| 1 | /* 32-bit ELF support for ARM |
| 2 | Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 20 | |
| 21 | #include "elf/arm.h" |
| 22 | #include "bfd.h" |
| 23 | #include "sysdep.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "elf-bfd.h" |
| 26 | |
| 27 | #ifndef NUM_ELEM |
| 28 | #define NUM_ELEM(a) (sizeof (a) / (sizeof (a)[0])) |
| 29 | #endif |
| 30 | |
| 31 | #define elf_info_to_howto 0 |
| 32 | #define elf_info_to_howto_rel elf32_arm_info_to_howto |
| 33 | |
| 34 | #define ARM_ELF_ABI_VERSION 0 |
| 35 | #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM |
| 36 | |
| 37 | /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g. |
| 38 | R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO |
| 39 | in that slot. */ |
| 40 | |
| 41 | static reloc_howto_type elf32_arm_howto_table_1[] = |
| 42 | { |
| 43 | /* No relocation */ |
| 44 | HOWTO (R_ARM_NONE, /* type */ |
| 45 | 0, /* rightshift */ |
| 46 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 47 | 0, /* bitsize */ |
| 48 | FALSE, /* pc_relative */ |
| 49 | 0, /* bitpos */ |
| 50 | complain_overflow_dont,/* complain_on_overflow */ |
| 51 | bfd_elf_generic_reloc, /* special_function */ |
| 52 | "R_ARM_NONE", /* name */ |
| 53 | FALSE, /* partial_inplace */ |
| 54 | 0, /* src_mask */ |
| 55 | 0, /* dst_mask */ |
| 56 | FALSE), /* pcrel_offset */ |
| 57 | |
| 58 | HOWTO (R_ARM_PC24, /* type */ |
| 59 | 2, /* rightshift */ |
| 60 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 61 | 24, /* bitsize */ |
| 62 | TRUE, /* pc_relative */ |
| 63 | 0, /* bitpos */ |
| 64 | complain_overflow_signed,/* complain_on_overflow */ |
| 65 | bfd_elf_generic_reloc, /* special_function */ |
| 66 | "R_ARM_PC24", /* name */ |
| 67 | FALSE, /* partial_inplace */ |
| 68 | 0x00ffffff, /* src_mask */ |
| 69 | 0x00ffffff, /* dst_mask */ |
| 70 | TRUE), /* pcrel_offset */ |
| 71 | |
| 72 | /* 32 bit absolute */ |
| 73 | HOWTO (R_ARM_ABS32, /* type */ |
| 74 | 0, /* rightshift */ |
| 75 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 76 | 32, /* bitsize */ |
| 77 | FALSE, /* pc_relative */ |
| 78 | 0, /* bitpos */ |
| 79 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 80 | bfd_elf_generic_reloc, /* special_function */ |
| 81 | "R_ARM_ABS32", /* name */ |
| 82 | FALSE, /* partial_inplace */ |
| 83 | 0xffffffff, /* src_mask */ |
| 84 | 0xffffffff, /* dst_mask */ |
| 85 | FALSE), /* pcrel_offset */ |
| 86 | |
| 87 | /* standard 32bit pc-relative reloc */ |
| 88 | HOWTO (R_ARM_REL32, /* type */ |
| 89 | 0, /* rightshift */ |
| 90 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 91 | 32, /* bitsize */ |
| 92 | TRUE, /* pc_relative */ |
| 93 | 0, /* bitpos */ |
| 94 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 95 | bfd_elf_generic_reloc, /* special_function */ |
| 96 | "R_ARM_REL32", /* name */ |
| 97 | FALSE, /* partial_inplace */ |
| 98 | 0xffffffff, /* src_mask */ |
| 99 | 0xffffffff, /* dst_mask */ |
| 100 | TRUE), /* pcrel_offset */ |
| 101 | |
| 102 | /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */ |
| 103 | HOWTO (R_ARM_PC13, /* type */ |
| 104 | 0, /* rightshift */ |
| 105 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 106 | 8, /* bitsize */ |
| 107 | FALSE, /* pc_relative */ |
| 108 | 0, /* bitpos */ |
| 109 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 110 | bfd_elf_generic_reloc, /* special_function */ |
| 111 | "R_ARM_PC13", /* name */ |
| 112 | FALSE, /* partial_inplace */ |
| 113 | 0x000000ff, /* src_mask */ |
| 114 | 0x000000ff, /* dst_mask */ |
| 115 | FALSE), /* pcrel_offset */ |
| 116 | |
| 117 | /* 16 bit absolute */ |
| 118 | HOWTO (R_ARM_ABS16, /* type */ |
| 119 | 0, /* rightshift */ |
| 120 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 121 | 16, /* bitsize */ |
| 122 | FALSE, /* pc_relative */ |
| 123 | 0, /* bitpos */ |
| 124 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 125 | bfd_elf_generic_reloc, /* special_function */ |
| 126 | "R_ARM_ABS16", /* name */ |
| 127 | FALSE, /* partial_inplace */ |
| 128 | 0x0000ffff, /* src_mask */ |
| 129 | 0x0000ffff, /* dst_mask */ |
| 130 | FALSE), /* pcrel_offset */ |
| 131 | |
| 132 | /* 12 bit absolute */ |
| 133 | HOWTO (R_ARM_ABS12, /* type */ |
| 134 | 0, /* rightshift */ |
| 135 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 136 | 12, /* bitsize */ |
| 137 | FALSE, /* pc_relative */ |
| 138 | 0, /* bitpos */ |
| 139 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 140 | bfd_elf_generic_reloc, /* special_function */ |
| 141 | "R_ARM_ABS12", /* name */ |
| 142 | FALSE, /* partial_inplace */ |
| 143 | 0x000008ff, /* src_mask */ |
| 144 | 0x000008ff, /* dst_mask */ |
| 145 | FALSE), /* pcrel_offset */ |
| 146 | |
| 147 | HOWTO (R_ARM_THM_ABS5, /* type */ |
| 148 | 6, /* rightshift */ |
| 149 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 150 | 5, /* bitsize */ |
| 151 | FALSE, /* pc_relative */ |
| 152 | 0, /* bitpos */ |
| 153 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 154 | bfd_elf_generic_reloc, /* special_function */ |
| 155 | "R_ARM_THM_ABS5", /* name */ |
| 156 | FALSE, /* partial_inplace */ |
| 157 | 0x000007e0, /* src_mask */ |
| 158 | 0x000007e0, /* dst_mask */ |
| 159 | FALSE), /* pcrel_offset */ |
| 160 | |
| 161 | /* 8 bit absolute */ |
| 162 | HOWTO (R_ARM_ABS8, /* type */ |
| 163 | 0, /* rightshift */ |
| 164 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 165 | 8, /* bitsize */ |
| 166 | FALSE, /* pc_relative */ |
| 167 | 0, /* bitpos */ |
| 168 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 169 | bfd_elf_generic_reloc, /* special_function */ |
| 170 | "R_ARM_ABS8", /* name */ |
| 171 | FALSE, /* partial_inplace */ |
| 172 | 0x000000ff, /* src_mask */ |
| 173 | 0x000000ff, /* dst_mask */ |
| 174 | FALSE), /* pcrel_offset */ |
| 175 | |
| 176 | HOWTO (R_ARM_SBREL32, /* type */ |
| 177 | 0, /* rightshift */ |
| 178 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 179 | 32, /* bitsize */ |
| 180 | FALSE, /* pc_relative */ |
| 181 | 0, /* bitpos */ |
| 182 | complain_overflow_dont,/* complain_on_overflow */ |
| 183 | bfd_elf_generic_reloc, /* special_function */ |
| 184 | "R_ARM_SBREL32", /* name */ |
| 185 | FALSE, /* partial_inplace */ |
| 186 | 0xffffffff, /* src_mask */ |
| 187 | 0xffffffff, /* dst_mask */ |
| 188 | FALSE), /* pcrel_offset */ |
| 189 | |
| 190 | /* FIXME: Has two more bits of offset in Thumb32. */ |
| 191 | HOWTO (R_ARM_THM_CALL, /* type */ |
| 192 | 1, /* rightshift */ |
| 193 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 194 | 23, /* 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_THM_CALL", /* name */ |
| 200 | FALSE, /* partial_inplace */ |
| 201 | 0x07ff07ff, /* src_mask */ |
| 202 | 0x07ff07ff, /* dst_mask */ |
| 203 | TRUE), /* pcrel_offset */ |
| 204 | |
| 205 | HOWTO (R_ARM_THM_PC8, /* type */ |
| 206 | 1, /* rightshift */ |
| 207 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 208 | 8, /* bitsize */ |
| 209 | TRUE, /* pc_relative */ |
| 210 | 0, /* bitpos */ |
| 211 | complain_overflow_signed,/* complain_on_overflow */ |
| 212 | bfd_elf_generic_reloc, /* special_function */ |
| 213 | "R_ARM_THM_PC8", /* name */ |
| 214 | FALSE, /* partial_inplace */ |
| 215 | 0x000000ff, /* src_mask */ |
| 216 | 0x000000ff, /* dst_mask */ |
| 217 | TRUE), /* pcrel_offset */ |
| 218 | |
| 219 | HOWTO (R_ARM_BREL_ADJ, /* type */ |
| 220 | 1, /* rightshift */ |
| 221 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 222 | 32, /* bitsize */ |
| 223 | FALSE, /* pc_relative */ |
| 224 | 0, /* bitpos */ |
| 225 | complain_overflow_signed,/* complain_on_overflow */ |
| 226 | bfd_elf_generic_reloc, /* special_function */ |
| 227 | "R_ARM_BREL_ADJ", /* name */ |
| 228 | FALSE, /* partial_inplace */ |
| 229 | 0xffffffff, /* src_mask */ |
| 230 | 0xffffffff, /* dst_mask */ |
| 231 | FALSE), /* pcrel_offset */ |
| 232 | |
| 233 | HOWTO (R_ARM_SWI24, /* type */ |
| 234 | 0, /* rightshift */ |
| 235 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 236 | 0, /* bitsize */ |
| 237 | FALSE, /* pc_relative */ |
| 238 | 0, /* bitpos */ |
| 239 | complain_overflow_signed,/* complain_on_overflow */ |
| 240 | bfd_elf_generic_reloc, /* special_function */ |
| 241 | "R_ARM_SWI24", /* name */ |
| 242 | FALSE, /* partial_inplace */ |
| 243 | 0x00000000, /* src_mask */ |
| 244 | 0x00000000, /* dst_mask */ |
| 245 | FALSE), /* pcrel_offset */ |
| 246 | |
| 247 | HOWTO (R_ARM_THM_SWI8, /* type */ |
| 248 | 0, /* rightshift */ |
| 249 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 250 | 0, /* bitsize */ |
| 251 | FALSE, /* pc_relative */ |
| 252 | 0, /* bitpos */ |
| 253 | complain_overflow_signed,/* complain_on_overflow */ |
| 254 | bfd_elf_generic_reloc, /* special_function */ |
| 255 | "R_ARM_SWI8", /* name */ |
| 256 | FALSE, /* partial_inplace */ |
| 257 | 0x00000000, /* src_mask */ |
| 258 | 0x00000000, /* dst_mask */ |
| 259 | FALSE), /* pcrel_offset */ |
| 260 | |
| 261 | /* BLX instruction for the ARM. */ |
| 262 | HOWTO (R_ARM_XPC25, /* type */ |
| 263 | 2, /* rightshift */ |
| 264 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 265 | 25, /* bitsize */ |
| 266 | TRUE, /* pc_relative */ |
| 267 | 0, /* bitpos */ |
| 268 | complain_overflow_signed,/* complain_on_overflow */ |
| 269 | bfd_elf_generic_reloc, /* special_function */ |
| 270 | "R_ARM_XPC25", /* name */ |
| 271 | FALSE, /* partial_inplace */ |
| 272 | 0x00ffffff, /* src_mask */ |
| 273 | 0x00ffffff, /* dst_mask */ |
| 274 | TRUE), /* pcrel_offset */ |
| 275 | |
| 276 | /* BLX instruction for the Thumb. */ |
| 277 | HOWTO (R_ARM_THM_XPC22, /* type */ |
| 278 | 2, /* rightshift */ |
| 279 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 280 | 22, /* bitsize */ |
| 281 | TRUE, /* pc_relative */ |
| 282 | 0, /* bitpos */ |
| 283 | complain_overflow_signed,/* complain_on_overflow */ |
| 284 | bfd_elf_generic_reloc, /* special_function */ |
| 285 | "R_ARM_THM_XPC22", /* name */ |
| 286 | FALSE, /* partial_inplace */ |
| 287 | 0x07ff07ff, /* src_mask */ |
| 288 | 0x07ff07ff, /* dst_mask */ |
| 289 | TRUE), /* pcrel_offset */ |
| 290 | |
| 291 | /* Dynamic TLS relocations. */ |
| 292 | |
| 293 | HOWTO (R_ARM_TLS_DTPMOD32, /* type */ |
| 294 | 0, /* rightshift */ |
| 295 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 296 | 32, /* bitsize */ |
| 297 | FALSE, /* pc_relative */ |
| 298 | 0, /* bitpos */ |
| 299 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 300 | bfd_elf_generic_reloc, /* special_function */ |
| 301 | "R_ARM_TLS_DTPMOD32", /* name */ |
| 302 | TRUE, /* partial_inplace */ |
| 303 | 0xffffffff, /* src_mask */ |
| 304 | 0xffffffff, /* dst_mask */ |
| 305 | FALSE), /* pcrel_offset */ |
| 306 | |
| 307 | HOWTO (R_ARM_TLS_DTPOFF32, /* type */ |
| 308 | 0, /* rightshift */ |
| 309 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 310 | 32, /* bitsize */ |
| 311 | FALSE, /* pc_relative */ |
| 312 | 0, /* bitpos */ |
| 313 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 314 | bfd_elf_generic_reloc, /* special_function */ |
| 315 | "R_ARM_TLS_DTPOFF32", /* name */ |
| 316 | TRUE, /* partial_inplace */ |
| 317 | 0xffffffff, /* src_mask */ |
| 318 | 0xffffffff, /* dst_mask */ |
| 319 | FALSE), /* pcrel_offset */ |
| 320 | |
| 321 | HOWTO (R_ARM_TLS_TPOFF32, /* 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_ARM_TLS_TPOFF32", /* name */ |
| 330 | TRUE, /* partial_inplace */ |
| 331 | 0xffffffff, /* src_mask */ |
| 332 | 0xffffffff, /* dst_mask */ |
| 333 | FALSE), /* pcrel_offset */ |
| 334 | |
| 335 | /* Relocs used in ARM Linux */ |
| 336 | |
| 337 | HOWTO (R_ARM_COPY, /* type */ |
| 338 | 0, /* rightshift */ |
| 339 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 340 | 32, /* bitsize */ |
| 341 | FALSE, /* pc_relative */ |
| 342 | 0, /* bitpos */ |
| 343 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 344 | bfd_elf_generic_reloc, /* special_function */ |
| 345 | "R_ARM_COPY", /* name */ |
| 346 | TRUE, /* partial_inplace */ |
| 347 | 0xffffffff, /* src_mask */ |
| 348 | 0xffffffff, /* dst_mask */ |
| 349 | FALSE), /* pcrel_offset */ |
| 350 | |
| 351 | HOWTO (R_ARM_GLOB_DAT, /* 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_ARM_GLOB_DAT", /* name */ |
| 360 | TRUE, /* partial_inplace */ |
| 361 | 0xffffffff, /* src_mask */ |
| 362 | 0xffffffff, /* dst_mask */ |
| 363 | FALSE), /* pcrel_offset */ |
| 364 | |
| 365 | HOWTO (R_ARM_JUMP_SLOT, /* type */ |
| 366 | 0, /* rightshift */ |
| 367 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 368 | 32, /* bitsize */ |
| 369 | FALSE, /* pc_relative */ |
| 370 | 0, /* bitpos */ |
| 371 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 372 | bfd_elf_generic_reloc, /* special_function */ |
| 373 | "R_ARM_JUMP_SLOT", /* name */ |
| 374 | TRUE, /* partial_inplace */ |
| 375 | 0xffffffff, /* src_mask */ |
| 376 | 0xffffffff, /* dst_mask */ |
| 377 | FALSE), /* pcrel_offset */ |
| 378 | |
| 379 | HOWTO (R_ARM_RELATIVE, /* type */ |
| 380 | 0, /* rightshift */ |
| 381 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 382 | 32, /* bitsize */ |
| 383 | FALSE, /* pc_relative */ |
| 384 | 0, /* bitpos */ |
| 385 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 386 | bfd_elf_generic_reloc, /* special_function */ |
| 387 | "R_ARM_RELATIVE", /* name */ |
| 388 | TRUE, /* partial_inplace */ |
| 389 | 0xffffffff, /* src_mask */ |
| 390 | 0xffffffff, /* dst_mask */ |
| 391 | FALSE), /* pcrel_offset */ |
| 392 | |
| 393 | HOWTO (R_ARM_GOTOFF32, /* type */ |
| 394 | 0, /* rightshift */ |
| 395 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 396 | 32, /* bitsize */ |
| 397 | FALSE, /* pc_relative */ |
| 398 | 0, /* bitpos */ |
| 399 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 400 | bfd_elf_generic_reloc, /* special_function */ |
| 401 | "R_ARM_GOTOFF32", /* name */ |
| 402 | TRUE, /* partial_inplace */ |
| 403 | 0xffffffff, /* src_mask */ |
| 404 | 0xffffffff, /* dst_mask */ |
| 405 | FALSE), /* pcrel_offset */ |
| 406 | |
| 407 | HOWTO (R_ARM_GOTPC, /* type */ |
| 408 | 0, /* rightshift */ |
| 409 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 410 | 32, /* bitsize */ |
| 411 | TRUE, /* pc_relative */ |
| 412 | 0, /* bitpos */ |
| 413 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 414 | bfd_elf_generic_reloc, /* special_function */ |
| 415 | "R_ARM_GOTPC", /* name */ |
| 416 | TRUE, /* partial_inplace */ |
| 417 | 0xffffffff, /* src_mask */ |
| 418 | 0xffffffff, /* dst_mask */ |
| 419 | TRUE), /* pcrel_offset */ |
| 420 | |
| 421 | HOWTO (R_ARM_GOT32, /* type */ |
| 422 | 0, /* rightshift */ |
| 423 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 424 | 32, /* bitsize */ |
| 425 | FALSE, /* pc_relative */ |
| 426 | 0, /* bitpos */ |
| 427 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 428 | bfd_elf_generic_reloc, /* special_function */ |
| 429 | "R_ARM_GOT32", /* name */ |
| 430 | TRUE, /* partial_inplace */ |
| 431 | 0xffffffff, /* src_mask */ |
| 432 | 0xffffffff, /* dst_mask */ |
| 433 | FALSE), /* pcrel_offset */ |
| 434 | |
| 435 | HOWTO (R_ARM_PLT32, /* type */ |
| 436 | 2, /* rightshift */ |
| 437 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 438 | 26, /* bitsize */ |
| 439 | TRUE, /* pc_relative */ |
| 440 | 0, /* bitpos */ |
| 441 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 442 | bfd_elf_generic_reloc, /* special_function */ |
| 443 | "R_ARM_PLT32", /* name */ |
| 444 | TRUE, /* partial_inplace */ |
| 445 | 0x00ffffff, /* src_mask */ |
| 446 | 0x00ffffff, /* dst_mask */ |
| 447 | TRUE), /* pcrel_offset */ |
| 448 | |
| 449 | HOWTO (R_ARM_CALL, /* type */ |
| 450 | 2, /* rightshift */ |
| 451 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 452 | 24, /* bitsize */ |
| 453 | TRUE, /* pc_relative */ |
| 454 | 0, /* bitpos */ |
| 455 | complain_overflow_signed,/* complain_on_overflow */ |
| 456 | bfd_elf_generic_reloc, /* special_function */ |
| 457 | "R_ARM_CALL", /* name */ |
| 458 | FALSE, /* partial_inplace */ |
| 459 | 0x00ffffff, /* src_mask */ |
| 460 | 0x00ffffff, /* dst_mask */ |
| 461 | TRUE), /* pcrel_offset */ |
| 462 | |
| 463 | HOWTO (R_ARM_JUMP24, /* type */ |
| 464 | 2, /* rightshift */ |
| 465 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 466 | 24, /* bitsize */ |
| 467 | TRUE, /* pc_relative */ |
| 468 | 0, /* bitpos */ |
| 469 | complain_overflow_signed,/* complain_on_overflow */ |
| 470 | bfd_elf_generic_reloc, /* special_function */ |
| 471 | "R_ARM_JUMP24", /* name */ |
| 472 | FALSE, /* partial_inplace */ |
| 473 | 0x00ffffff, /* src_mask */ |
| 474 | 0x00ffffff, /* dst_mask */ |
| 475 | TRUE), /* pcrel_offset */ |
| 476 | |
| 477 | HOWTO (R_ARM_THM_JUMP24, /* type */ |
| 478 | 1, /* rightshift */ |
| 479 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 480 | 24, /* bitsize */ |
| 481 | TRUE, /* pc_relative */ |
| 482 | 0, /* bitpos */ |
| 483 | complain_overflow_signed,/* complain_on_overflow */ |
| 484 | bfd_elf_generic_reloc, /* special_function */ |
| 485 | "R_ARM_THM_JUMP24", /* name */ |
| 486 | FALSE, /* partial_inplace */ |
| 487 | 0x07ff2fff, /* src_mask */ |
| 488 | 0x07ff2fff, /* dst_mask */ |
| 489 | TRUE), /* pcrel_offset */ |
| 490 | |
| 491 | HOWTO (R_ARM_BASE_ABS, /* type */ |
| 492 | 0, /* rightshift */ |
| 493 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 494 | 32, /* 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_BASE_ABS", /* name */ |
| 500 | FALSE, /* partial_inplace */ |
| 501 | 0xffffffff, /* src_mask */ |
| 502 | 0xffffffff, /* dst_mask */ |
| 503 | FALSE), /* pcrel_offset */ |
| 504 | |
| 505 | HOWTO (R_ARM_ALU_PCREL7_0, /* type */ |
| 506 | 0, /* rightshift */ |
| 507 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 508 | 12, /* bitsize */ |
| 509 | TRUE, /* pc_relative */ |
| 510 | 0, /* bitpos */ |
| 511 | complain_overflow_dont,/* complain_on_overflow */ |
| 512 | bfd_elf_generic_reloc, /* special_function */ |
| 513 | "R_ARM_ALU_PCREL_7_0", /* name */ |
| 514 | FALSE, /* partial_inplace */ |
| 515 | 0x00000fff, /* src_mask */ |
| 516 | 0x00000fff, /* dst_mask */ |
| 517 | TRUE), /* pcrel_offset */ |
| 518 | |
| 519 | HOWTO (R_ARM_ALU_PCREL15_8, /* type */ |
| 520 | 0, /* rightshift */ |
| 521 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 522 | 12, /* bitsize */ |
| 523 | TRUE, /* pc_relative */ |
| 524 | 8, /* bitpos */ |
| 525 | complain_overflow_dont,/* complain_on_overflow */ |
| 526 | bfd_elf_generic_reloc, /* special_function */ |
| 527 | "R_ARM_ALU_PCREL_15_8",/* name */ |
| 528 | FALSE, /* partial_inplace */ |
| 529 | 0x00000fff, /* src_mask */ |
| 530 | 0x00000fff, /* dst_mask */ |
| 531 | TRUE), /* pcrel_offset */ |
| 532 | |
| 533 | HOWTO (R_ARM_ALU_PCREL23_15, /* type */ |
| 534 | 0, /* rightshift */ |
| 535 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 536 | 12, /* bitsize */ |
| 537 | TRUE, /* pc_relative */ |
| 538 | 16, /* bitpos */ |
| 539 | complain_overflow_dont,/* complain_on_overflow */ |
| 540 | bfd_elf_generic_reloc, /* special_function */ |
| 541 | "R_ARM_ALU_PCREL_23_15",/* name */ |
| 542 | FALSE, /* partial_inplace */ |
| 543 | 0x00000fff, /* src_mask */ |
| 544 | 0x00000fff, /* dst_mask */ |
| 545 | TRUE), /* pcrel_offset */ |
| 546 | |
| 547 | HOWTO (R_ARM_LDR_SBREL_11_0, /* type */ |
| 548 | 0, /* rightshift */ |
| 549 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 550 | 12, /* bitsize */ |
| 551 | FALSE, /* pc_relative */ |
| 552 | 0, /* bitpos */ |
| 553 | complain_overflow_dont,/* complain_on_overflow */ |
| 554 | bfd_elf_generic_reloc, /* special_function */ |
| 555 | "R_ARM_LDR_SBREL_11_0",/* name */ |
| 556 | FALSE, /* partial_inplace */ |
| 557 | 0x00000fff, /* src_mask */ |
| 558 | 0x00000fff, /* dst_mask */ |
| 559 | FALSE), /* pcrel_offset */ |
| 560 | |
| 561 | HOWTO (R_ARM_ALU_SBREL_19_12, /* type */ |
| 562 | 0, /* rightshift */ |
| 563 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 564 | 8, /* bitsize */ |
| 565 | FALSE, /* pc_relative */ |
| 566 | 12, /* bitpos */ |
| 567 | complain_overflow_dont,/* complain_on_overflow */ |
| 568 | bfd_elf_generic_reloc, /* special_function */ |
| 569 | "R_ARM_ALU_SBREL_19_12",/* name */ |
| 570 | FALSE, /* partial_inplace */ |
| 571 | 0x000ff000, /* src_mask */ |
| 572 | 0x000ff000, /* dst_mask */ |
| 573 | FALSE), /* pcrel_offset */ |
| 574 | |
| 575 | HOWTO (R_ARM_ALU_SBREL_27_20, /* type */ |
| 576 | 0, /* rightshift */ |
| 577 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 578 | 8, /* bitsize */ |
| 579 | FALSE, /* pc_relative */ |
| 580 | 20, /* bitpos */ |
| 581 | complain_overflow_dont,/* complain_on_overflow */ |
| 582 | bfd_elf_generic_reloc, /* special_function */ |
| 583 | "R_ARM_ALU_SBREL_27_20",/* name */ |
| 584 | FALSE, /* partial_inplace */ |
| 585 | 0x0ff00000, /* src_mask */ |
| 586 | 0x0ff00000, /* dst_mask */ |
| 587 | FALSE), /* pcrel_offset */ |
| 588 | |
| 589 | HOWTO (R_ARM_TARGET1, /* type */ |
| 590 | 0, /* rightshift */ |
| 591 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 592 | 32, /* bitsize */ |
| 593 | FALSE, /* pc_relative */ |
| 594 | 0, /* bitpos */ |
| 595 | complain_overflow_dont,/* complain_on_overflow */ |
| 596 | bfd_elf_generic_reloc, /* special_function */ |
| 597 | "R_ARM_TARGET1", /* name */ |
| 598 | FALSE, /* partial_inplace */ |
| 599 | 0xffffffff, /* src_mask */ |
| 600 | 0xffffffff, /* dst_mask */ |
| 601 | FALSE), /* pcrel_offset */ |
| 602 | |
| 603 | HOWTO (R_ARM_ROSEGREL32, /* type */ |
| 604 | 0, /* rightshift */ |
| 605 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 606 | 32, /* bitsize */ |
| 607 | FALSE, /* pc_relative */ |
| 608 | 0, /* bitpos */ |
| 609 | complain_overflow_dont,/* complain_on_overflow */ |
| 610 | bfd_elf_generic_reloc, /* special_function */ |
| 611 | "R_ARM_ROSEGREL32", /* name */ |
| 612 | FALSE, /* partial_inplace */ |
| 613 | 0xffffffff, /* src_mask */ |
| 614 | 0xffffffff, /* dst_mask */ |
| 615 | FALSE), /* pcrel_offset */ |
| 616 | |
| 617 | HOWTO (R_ARM_V4BX, /* type */ |
| 618 | 0, /* rightshift */ |
| 619 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 620 | 32, /* bitsize */ |
| 621 | FALSE, /* pc_relative */ |
| 622 | 0, /* bitpos */ |
| 623 | complain_overflow_dont,/* complain_on_overflow */ |
| 624 | bfd_elf_generic_reloc, /* special_function */ |
| 625 | "R_ARM_V4BX", /* name */ |
| 626 | FALSE, /* partial_inplace */ |
| 627 | 0xffffffff, /* src_mask */ |
| 628 | 0xffffffff, /* dst_mask */ |
| 629 | FALSE), /* pcrel_offset */ |
| 630 | |
| 631 | HOWTO (R_ARM_TARGET2, /* type */ |
| 632 | 0, /* rightshift */ |
| 633 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 634 | 32, /* bitsize */ |
| 635 | FALSE, /* pc_relative */ |
| 636 | 0, /* bitpos */ |
| 637 | complain_overflow_signed,/* complain_on_overflow */ |
| 638 | bfd_elf_generic_reloc, /* special_function */ |
| 639 | "R_ARM_TARGET2", /* name */ |
| 640 | FALSE, /* partial_inplace */ |
| 641 | 0xffffffff, /* src_mask */ |
| 642 | 0xffffffff, /* dst_mask */ |
| 643 | TRUE), /* pcrel_offset */ |
| 644 | |
| 645 | HOWTO (R_ARM_PREL31, /* type */ |
| 646 | 0, /* rightshift */ |
| 647 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 648 | 31, /* bitsize */ |
| 649 | TRUE, /* pc_relative */ |
| 650 | 0, /* bitpos */ |
| 651 | complain_overflow_signed,/* complain_on_overflow */ |
| 652 | bfd_elf_generic_reloc, /* special_function */ |
| 653 | "R_ARM_PREL31", /* name */ |
| 654 | FALSE, /* partial_inplace */ |
| 655 | 0x7fffffff, /* src_mask */ |
| 656 | 0x7fffffff, /* dst_mask */ |
| 657 | TRUE), /* pcrel_offset */ |
| 658 | |
| 659 | HOWTO (R_ARM_MOVW_ABS_NC, /* type */ |
| 660 | 0, /* rightshift */ |
| 661 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 662 | 16, /* bitsize */ |
| 663 | FALSE, /* pc_relative */ |
| 664 | 0, /* bitpos */ |
| 665 | complain_overflow_dont,/* complain_on_overflow */ |
| 666 | bfd_elf_generic_reloc, /* special_function */ |
| 667 | "R_ARM_MOVW_ABS_NC", /* name */ |
| 668 | FALSE, /* partial_inplace */ |
| 669 | 0x0000ffff, /* src_mask */ |
| 670 | 0x0000ffff, /* dst_mask */ |
| 671 | FALSE), /* pcrel_offset */ |
| 672 | |
| 673 | HOWTO (R_ARM_MOVT_ABS, /* type */ |
| 674 | 0, /* rightshift */ |
| 675 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 676 | 16, /* bitsize */ |
| 677 | FALSE, /* pc_relative */ |
| 678 | 0, /* bitpos */ |
| 679 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 680 | bfd_elf_generic_reloc, /* special_function */ |
| 681 | "R_ARM_MOVT_ABS", /* name */ |
| 682 | FALSE, /* partial_inplace */ |
| 683 | 0x0000ffff, /* src_mask */ |
| 684 | 0x0000ffff, /* dst_mask */ |
| 685 | FALSE), /* pcrel_offset */ |
| 686 | |
| 687 | HOWTO (R_ARM_MOVW_PREL_NC, /* type */ |
| 688 | 0, /* rightshift */ |
| 689 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 690 | 16, /* bitsize */ |
| 691 | TRUE, /* pc_relative */ |
| 692 | 0, /* bitpos */ |
| 693 | complain_overflow_dont,/* complain_on_overflow */ |
| 694 | bfd_elf_generic_reloc, /* special_function */ |
| 695 | "R_ARM_MOVW_PREL_NC", /* name */ |
| 696 | FALSE, /* partial_inplace */ |
| 697 | 0x0000ffff, /* src_mask */ |
| 698 | 0x0000ffff, /* dst_mask */ |
| 699 | TRUE), /* pcrel_offset */ |
| 700 | |
| 701 | HOWTO (R_ARM_MOVT_PREL, /* type */ |
| 702 | 0, /* rightshift */ |
| 703 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 704 | 16, /* bitsize */ |
| 705 | TRUE, /* pc_relative */ |
| 706 | 0, /* bitpos */ |
| 707 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 708 | bfd_elf_generic_reloc, /* special_function */ |
| 709 | "R_ARM_MOVT_PREL", /* name */ |
| 710 | FALSE, /* partial_inplace */ |
| 711 | 0x0000ffff, /* src_mask */ |
| 712 | 0x0000ffff, /* dst_mask */ |
| 713 | TRUE), /* pcrel_offset */ |
| 714 | |
| 715 | HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */ |
| 716 | 0, /* rightshift */ |
| 717 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 718 | 16, /* bitsize */ |
| 719 | FALSE, /* pc_relative */ |
| 720 | 0, /* bitpos */ |
| 721 | complain_overflow_dont,/* complain_on_overflow */ |
| 722 | bfd_elf_generic_reloc, /* special_function */ |
| 723 | "R_ARM_THM_MOVW_ABS_NC",/* name */ |
| 724 | FALSE, /* partial_inplace */ |
| 725 | 0x040f70ff, /* src_mask */ |
| 726 | 0x040f70ff, /* dst_mask */ |
| 727 | FALSE), /* pcrel_offset */ |
| 728 | |
| 729 | HOWTO (R_ARM_THM_MOVT_ABS, /* type */ |
| 730 | 0, /* rightshift */ |
| 731 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 732 | 16, /* bitsize */ |
| 733 | FALSE, /* pc_relative */ |
| 734 | 0, /* bitpos */ |
| 735 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 736 | bfd_elf_generic_reloc, /* special_function */ |
| 737 | "R_ARM_THM_MOVT_ABS", /* name */ |
| 738 | FALSE, /* partial_inplace */ |
| 739 | 0x040f70ff, /* src_mask */ |
| 740 | 0x040f70ff, /* dst_mask */ |
| 741 | FALSE), /* pcrel_offset */ |
| 742 | |
| 743 | HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */ |
| 744 | 0, /* rightshift */ |
| 745 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 746 | 16, /* bitsize */ |
| 747 | TRUE, /* pc_relative */ |
| 748 | 0, /* bitpos */ |
| 749 | complain_overflow_dont,/* complain_on_overflow */ |
| 750 | bfd_elf_generic_reloc, /* special_function */ |
| 751 | "R_ARM_THM_MOVW_PREL_NC",/* name */ |
| 752 | FALSE, /* partial_inplace */ |
| 753 | 0x040f70ff, /* src_mask */ |
| 754 | 0x040f70ff, /* dst_mask */ |
| 755 | TRUE), /* pcrel_offset */ |
| 756 | |
| 757 | HOWTO (R_ARM_THM_MOVT_PREL, /* type */ |
| 758 | 0, /* rightshift */ |
| 759 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 760 | 16, /* bitsize */ |
| 761 | TRUE, /* pc_relative */ |
| 762 | 0, /* bitpos */ |
| 763 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 764 | bfd_elf_generic_reloc, /* special_function */ |
| 765 | "R_ARM_THM_MOVT_PREL", /* name */ |
| 766 | FALSE, /* partial_inplace */ |
| 767 | 0x040f70ff, /* src_mask */ |
| 768 | 0x040f70ff, /* dst_mask */ |
| 769 | TRUE), /* pcrel_offset */ |
| 770 | |
| 771 | HOWTO (R_ARM_THM_JUMP19, /* type */ |
| 772 | 1, /* rightshift */ |
| 773 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 774 | 19, /* bitsize */ |
| 775 | TRUE, /* pc_relative */ |
| 776 | 0, /* bitpos */ |
| 777 | complain_overflow_signed,/* complain_on_overflow */ |
| 778 | bfd_elf_generic_reloc, /* special_function */ |
| 779 | "R_ARM_THM_JUMP19", /* name */ |
| 780 | FALSE, /* partial_inplace */ |
| 781 | 0x043f2fff, /* src_mask */ |
| 782 | 0x043f2fff, /* dst_mask */ |
| 783 | TRUE), /* pcrel_offset */ |
| 784 | |
| 785 | HOWTO (R_ARM_THM_JUMP6, /* type */ |
| 786 | 1, /* rightshift */ |
| 787 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 788 | 6, /* bitsize */ |
| 789 | TRUE, /* pc_relative */ |
| 790 | 0, /* bitpos */ |
| 791 | complain_overflow_unsigned,/* complain_on_overflow */ |
| 792 | bfd_elf_generic_reloc, /* special_function */ |
| 793 | "R_ARM_THM_JUMP6", /* name */ |
| 794 | FALSE, /* partial_inplace */ |
| 795 | 0x02f8, /* src_mask */ |
| 796 | 0x02f8, /* dst_mask */ |
| 797 | TRUE), /* pcrel_offset */ |
| 798 | |
| 799 | /* These are declared as 13-bit signed relocations because we can |
| 800 | address -4095 .. 4095(base) by altering ADDW to SUBW or vice |
| 801 | versa. */ |
| 802 | HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */ |
| 803 | 0, /* rightshift */ |
| 804 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 805 | 13, /* bitsize */ |
| 806 | TRUE, /* pc_relative */ |
| 807 | 0, /* bitpos */ |
| 808 | complain_overflow_signed,/* complain_on_overflow */ |
| 809 | bfd_elf_generic_reloc, /* special_function */ |
| 810 | "R_ARM_THM_ALU_PREL_11_0",/* name */ |
| 811 | FALSE, /* partial_inplace */ |
| 812 | 0x040070ff, /* src_mask */ |
| 813 | 0x040070ff, /* dst_mask */ |
| 814 | TRUE), /* pcrel_offset */ |
| 815 | |
| 816 | HOWTO (R_ARM_THM_PC12, /* type */ |
| 817 | 0, /* rightshift */ |
| 818 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 819 | 13, /* bitsize */ |
| 820 | TRUE, /* pc_relative */ |
| 821 | 0, /* bitpos */ |
| 822 | complain_overflow_signed,/* complain_on_overflow */ |
| 823 | bfd_elf_generic_reloc, /* special_function */ |
| 824 | "R_ARM_THM_PC12", /* name */ |
| 825 | FALSE, /* partial_inplace */ |
| 826 | 0x040070ff, /* src_mask */ |
| 827 | 0x040070ff, /* dst_mask */ |
| 828 | TRUE), /* pcrel_offset */ |
| 829 | |
| 830 | HOWTO (R_ARM_ABS32_NOI, /* type */ |
| 831 | 0, /* rightshift */ |
| 832 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 833 | 32, /* bitsize */ |
| 834 | FALSE, /* pc_relative */ |
| 835 | 0, /* bitpos */ |
| 836 | complain_overflow_dont,/* complain_on_overflow */ |
| 837 | bfd_elf_generic_reloc, /* special_function */ |
| 838 | "R_ARM_ABS32_NOI", /* name */ |
| 839 | FALSE, /* partial_inplace */ |
| 840 | 0xffffffff, /* src_mask */ |
| 841 | 0xffffffff, /* dst_mask */ |
| 842 | FALSE), /* pcrel_offset */ |
| 843 | |
| 844 | HOWTO (R_ARM_REL32_NOI, /* type */ |
| 845 | 0, /* rightshift */ |
| 846 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 847 | 32, /* bitsize */ |
| 848 | TRUE, /* pc_relative */ |
| 849 | 0, /* bitpos */ |
| 850 | complain_overflow_dont,/* complain_on_overflow */ |
| 851 | bfd_elf_generic_reloc, /* special_function */ |
| 852 | "R_ARM_REL32_NOI", /* name */ |
| 853 | FALSE, /* partial_inplace */ |
| 854 | 0xffffffff, /* src_mask */ |
| 855 | 0xffffffff, /* dst_mask */ |
| 856 | FALSE), /* pcrel_offset */ |
| 857 | }; |
| 858 | |
| 859 | /* Relocations 57 .. 83 are the "group relocations" which we do not |
| 860 | support. */ |
| 861 | |
| 862 | static reloc_howto_type elf32_arm_howto_table_2[] = |
| 863 | { |
| 864 | HOWTO (R_ARM_MOVW_BREL_NC, /* type */ |
| 865 | 0, /* rightshift */ |
| 866 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 867 | 16, /* bitsize */ |
| 868 | FALSE, /* pc_relative */ |
| 869 | 0, /* bitpos */ |
| 870 | complain_overflow_dont,/* complain_on_overflow */ |
| 871 | bfd_elf_generic_reloc, /* special_function */ |
| 872 | "R_ARM_MOVW_BREL_NC", /* name */ |
| 873 | FALSE, /* partial_inplace */ |
| 874 | 0x0000ffff, /* src_mask */ |
| 875 | 0x0000ffff, /* dst_mask */ |
| 876 | FALSE), /* pcrel_offset */ |
| 877 | |
| 878 | HOWTO (R_ARM_MOVT_BREL, /* type */ |
| 879 | 0, /* rightshift */ |
| 880 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 881 | 16, /* bitsize */ |
| 882 | FALSE, /* pc_relative */ |
| 883 | 0, /* bitpos */ |
| 884 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 885 | bfd_elf_generic_reloc, /* special_function */ |
| 886 | "R_ARM_MOVT_BREL", /* name */ |
| 887 | FALSE, /* partial_inplace */ |
| 888 | 0x0000ffff, /* src_mask */ |
| 889 | 0x0000ffff, /* dst_mask */ |
| 890 | FALSE), /* pcrel_offset */ |
| 891 | |
| 892 | HOWTO (R_ARM_MOVW_BREL, /* type */ |
| 893 | 0, /* rightshift */ |
| 894 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 895 | 16, /* bitsize */ |
| 896 | FALSE, /* pc_relative */ |
| 897 | 0, /* bitpos */ |
| 898 | complain_overflow_dont,/* complain_on_overflow */ |
| 899 | bfd_elf_generic_reloc, /* special_function */ |
| 900 | "R_ARM_MOVW_BREL", /* name */ |
| 901 | FALSE, /* partial_inplace */ |
| 902 | 0x0000ffff, /* src_mask */ |
| 903 | 0x0000ffff, /* dst_mask */ |
| 904 | FALSE), /* pcrel_offset */ |
| 905 | |
| 906 | HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */ |
| 907 | 0, /* rightshift */ |
| 908 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 909 | 16, /* bitsize */ |
| 910 | FALSE, /* pc_relative */ |
| 911 | 0, /* bitpos */ |
| 912 | complain_overflow_dont,/* complain_on_overflow */ |
| 913 | bfd_elf_generic_reloc, /* special_function */ |
| 914 | "R_ARM_THM_MOVW_BREL_NC",/* name */ |
| 915 | FALSE, /* partial_inplace */ |
| 916 | 0x040f70ff, /* src_mask */ |
| 917 | 0x040f70ff, /* dst_mask */ |
| 918 | FALSE), /* pcrel_offset */ |
| 919 | |
| 920 | HOWTO (R_ARM_THM_MOVT_BREL, /* type */ |
| 921 | 0, /* rightshift */ |
| 922 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 923 | 16, /* bitsize */ |
| 924 | FALSE, /* pc_relative */ |
| 925 | 0, /* bitpos */ |
| 926 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 927 | bfd_elf_generic_reloc, /* special_function */ |
| 928 | "R_ARM_THM_MOVT_BREL", /* name */ |
| 929 | FALSE, /* partial_inplace */ |
| 930 | 0x040f70ff, /* src_mask */ |
| 931 | 0x040f70ff, /* dst_mask */ |
| 932 | FALSE), /* pcrel_offset */ |
| 933 | |
| 934 | HOWTO (R_ARM_THM_MOVW_BREL, /* type */ |
| 935 | 0, /* rightshift */ |
| 936 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 937 | 16, /* bitsize */ |
| 938 | FALSE, /* pc_relative */ |
| 939 | 0, /* bitpos */ |
| 940 | complain_overflow_dont,/* complain_on_overflow */ |
| 941 | bfd_elf_generic_reloc, /* special_function */ |
| 942 | "R_ARM_THM_MOVW_BREL", /* name */ |
| 943 | FALSE, /* partial_inplace */ |
| 944 | 0x040f70ff, /* src_mask */ |
| 945 | 0x040f70ff, /* dst_mask */ |
| 946 | FALSE), /* pcrel_offset */ |
| 947 | |
| 948 | EMPTY_HOWTO (90), /* unallocated */ |
| 949 | EMPTY_HOWTO (91), |
| 950 | EMPTY_HOWTO (92), |
| 951 | EMPTY_HOWTO (93), |
| 952 | |
| 953 | HOWTO (R_ARM_PLT32_ABS, /* type */ |
| 954 | 0, /* rightshift */ |
| 955 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 956 | 32, /* bitsize */ |
| 957 | FALSE, /* pc_relative */ |
| 958 | 0, /* bitpos */ |
| 959 | complain_overflow_dont,/* complain_on_overflow */ |
| 960 | bfd_elf_generic_reloc, /* special_function */ |
| 961 | "R_ARM_PLT32_ABS", /* name */ |
| 962 | FALSE, /* partial_inplace */ |
| 963 | 0xffffffff, /* src_mask */ |
| 964 | 0xffffffff, /* dst_mask */ |
| 965 | FALSE), /* pcrel_offset */ |
| 966 | |
| 967 | HOWTO (R_ARM_GOT_ABS, /* type */ |
| 968 | 0, /* rightshift */ |
| 969 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 970 | 32, /* bitsize */ |
| 971 | FALSE, /* pc_relative */ |
| 972 | 0, /* bitpos */ |
| 973 | complain_overflow_dont,/* complain_on_overflow */ |
| 974 | bfd_elf_generic_reloc, /* special_function */ |
| 975 | "R_ARM_GOT_ABS", /* name */ |
| 976 | FALSE, /* partial_inplace */ |
| 977 | 0xffffffff, /* src_mask */ |
| 978 | 0xffffffff, /* dst_mask */ |
| 979 | FALSE), /* pcrel_offset */ |
| 980 | |
| 981 | HOWTO (R_ARM_GOT_PREL, /* type */ |
| 982 | 0, /* rightshift */ |
| 983 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 984 | 32, /* bitsize */ |
| 985 | TRUE, /* pc_relative */ |
| 986 | 0, /* bitpos */ |
| 987 | complain_overflow_dont, /* complain_on_overflow */ |
| 988 | bfd_elf_generic_reloc, /* special_function */ |
| 989 | "R_ARM_GOT_PREL", /* name */ |
| 990 | FALSE, /* partial_inplace */ |
| 991 | 0xffffffff, /* src_mask */ |
| 992 | 0xffffffff, /* dst_mask */ |
| 993 | TRUE), /* pcrel_offset */ |
| 994 | |
| 995 | HOWTO (R_ARM_GOT_BREL12, /* type */ |
| 996 | 0, /* rightshift */ |
| 997 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 998 | 12, /* bitsize */ |
| 999 | FALSE, /* pc_relative */ |
| 1000 | 0, /* bitpos */ |
| 1001 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1002 | bfd_elf_generic_reloc, /* special_function */ |
| 1003 | "R_ARM_GOT_BREL12", /* name */ |
| 1004 | FALSE, /* partial_inplace */ |
| 1005 | 0x00000fff, /* src_mask */ |
| 1006 | 0x00000fff, /* dst_mask */ |
| 1007 | FALSE), /* pcrel_offset */ |
| 1008 | |
| 1009 | HOWTO (R_ARM_GOTOFF12, /* type */ |
| 1010 | 0, /* rightshift */ |
| 1011 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1012 | 12, /* bitsize */ |
| 1013 | FALSE, /* pc_relative */ |
| 1014 | 0, /* bitpos */ |
| 1015 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1016 | bfd_elf_generic_reloc, /* special_function */ |
| 1017 | "R_ARM_GOTOFF12", /* name */ |
| 1018 | FALSE, /* partial_inplace */ |
| 1019 | 0x00000fff, /* src_mask */ |
| 1020 | 0x00000fff, /* dst_mask */ |
| 1021 | FALSE), /* pcrel_offset */ |
| 1022 | |
| 1023 | EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */ |
| 1024 | |
| 1025 | /* GNU extension to record C++ vtable member usage */ |
| 1026 | HOWTO (R_ARM_GNU_VTENTRY, /* type */ |
| 1027 | 0, /* rightshift */ |
| 1028 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1029 | 0, /* bitsize */ |
| 1030 | FALSE, /* pc_relative */ |
| 1031 | 0, /* bitpos */ |
| 1032 | complain_overflow_dont, /* complain_on_overflow */ |
| 1033 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| 1034 | "R_ARM_GNU_VTENTRY", /* name */ |
| 1035 | FALSE, /* partial_inplace */ |
| 1036 | 0, /* src_mask */ |
| 1037 | 0, /* dst_mask */ |
| 1038 | FALSE), /* pcrel_offset */ |
| 1039 | |
| 1040 | /* GNU extension to record C++ vtable hierarchy */ |
| 1041 | HOWTO (R_ARM_GNU_VTINHERIT, /* type */ |
| 1042 | 0, /* rightshift */ |
| 1043 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1044 | 0, /* bitsize */ |
| 1045 | FALSE, /* pc_relative */ |
| 1046 | 0, /* bitpos */ |
| 1047 | complain_overflow_dont, /* complain_on_overflow */ |
| 1048 | NULL, /* special_function */ |
| 1049 | "R_ARM_GNU_VTINHERIT", /* name */ |
| 1050 | FALSE, /* partial_inplace */ |
| 1051 | 0, /* src_mask */ |
| 1052 | 0, /* dst_mask */ |
| 1053 | FALSE), /* pcrel_offset */ |
| 1054 | |
| 1055 | HOWTO (R_ARM_THM_JUMP11, /* type */ |
| 1056 | 1, /* rightshift */ |
| 1057 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1058 | 11, /* bitsize */ |
| 1059 | TRUE, /* pc_relative */ |
| 1060 | 0, /* bitpos */ |
| 1061 | complain_overflow_signed, /* complain_on_overflow */ |
| 1062 | bfd_elf_generic_reloc, /* special_function */ |
| 1063 | "R_ARM_THM_JUMP11", /* name */ |
| 1064 | FALSE, /* partial_inplace */ |
| 1065 | 0x000007ff, /* src_mask */ |
| 1066 | 0x000007ff, /* dst_mask */ |
| 1067 | TRUE), /* pcrel_offset */ |
| 1068 | |
| 1069 | HOWTO (R_ARM_THM_JUMP8, /* type */ |
| 1070 | 1, /* rightshift */ |
| 1071 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1072 | 8, /* bitsize */ |
| 1073 | TRUE, /* pc_relative */ |
| 1074 | 0, /* bitpos */ |
| 1075 | complain_overflow_signed, /* complain_on_overflow */ |
| 1076 | bfd_elf_generic_reloc, /* special_function */ |
| 1077 | "R_ARM_THM_JUMP8", /* name */ |
| 1078 | FALSE, /* partial_inplace */ |
| 1079 | 0x000000ff, /* src_mask */ |
| 1080 | 0x000000ff, /* dst_mask */ |
| 1081 | TRUE), /* pcrel_offset */ |
| 1082 | |
| 1083 | /* TLS relocations */ |
| 1084 | HOWTO (R_ARM_TLS_GD32, /* type */ |
| 1085 | 0, /* rightshift */ |
| 1086 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1087 | 32, /* bitsize */ |
| 1088 | FALSE, /* pc_relative */ |
| 1089 | 0, /* bitpos */ |
| 1090 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1091 | NULL, /* special_function */ |
| 1092 | "R_ARM_TLS_GD32", /* name */ |
| 1093 | TRUE, /* partial_inplace */ |
| 1094 | 0xffffffff, /* src_mask */ |
| 1095 | 0xffffffff, /* dst_mask */ |
| 1096 | FALSE), /* pcrel_offset */ |
| 1097 | |
| 1098 | HOWTO (R_ARM_TLS_LDM32, /* type */ |
| 1099 | 0, /* rightshift */ |
| 1100 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1101 | 32, /* bitsize */ |
| 1102 | FALSE, /* pc_relative */ |
| 1103 | 0, /* bitpos */ |
| 1104 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1105 | bfd_elf_generic_reloc, /* special_function */ |
| 1106 | "R_ARM_TLS_LDM32", /* name */ |
| 1107 | TRUE, /* partial_inplace */ |
| 1108 | 0xffffffff, /* src_mask */ |
| 1109 | 0xffffffff, /* dst_mask */ |
| 1110 | FALSE), /* pcrel_offset */ |
| 1111 | |
| 1112 | HOWTO (R_ARM_TLS_LDO32, /* type */ |
| 1113 | 0, /* rightshift */ |
| 1114 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1115 | 32, /* bitsize */ |
| 1116 | FALSE, /* pc_relative */ |
| 1117 | 0, /* bitpos */ |
| 1118 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1119 | bfd_elf_generic_reloc, /* special_function */ |
| 1120 | "R_ARM_TLS_LDO32", /* name */ |
| 1121 | TRUE, /* partial_inplace */ |
| 1122 | 0xffffffff, /* src_mask */ |
| 1123 | 0xffffffff, /* dst_mask */ |
| 1124 | FALSE), /* pcrel_offset */ |
| 1125 | |
| 1126 | HOWTO (R_ARM_TLS_IE32, /* type */ |
| 1127 | 0, /* rightshift */ |
| 1128 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1129 | 32, /* bitsize */ |
| 1130 | FALSE, /* pc_relative */ |
| 1131 | 0, /* bitpos */ |
| 1132 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1133 | NULL, /* special_function */ |
| 1134 | "R_ARM_TLS_IE32", /* name */ |
| 1135 | TRUE, /* partial_inplace */ |
| 1136 | 0xffffffff, /* src_mask */ |
| 1137 | 0xffffffff, /* dst_mask */ |
| 1138 | FALSE), /* pcrel_offset */ |
| 1139 | |
| 1140 | HOWTO (R_ARM_TLS_LE32, /* type */ |
| 1141 | 0, /* rightshift */ |
| 1142 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1143 | 32, /* bitsize */ |
| 1144 | FALSE, /* pc_relative */ |
| 1145 | 0, /* bitpos */ |
| 1146 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1147 | bfd_elf_generic_reloc, /* special_function */ |
| 1148 | "R_ARM_TLS_LE32", /* name */ |
| 1149 | TRUE, /* partial_inplace */ |
| 1150 | 0xffffffff, /* src_mask */ |
| 1151 | 0xffffffff, /* dst_mask */ |
| 1152 | FALSE), /* pcrel_offset */ |
| 1153 | |
| 1154 | HOWTO (R_ARM_TLS_LDO12, /* type */ |
| 1155 | 0, /* rightshift */ |
| 1156 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1157 | 12, /* bitsize */ |
| 1158 | FALSE, /* pc_relative */ |
| 1159 | 0, /* bitpos */ |
| 1160 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1161 | bfd_elf_generic_reloc, /* special_function */ |
| 1162 | "R_ARM_TLS_LDO12", /* name */ |
| 1163 | FALSE, /* partial_inplace */ |
| 1164 | 0x00000fff, /* src_mask */ |
| 1165 | 0x00000fff, /* dst_mask */ |
| 1166 | FALSE), /* pcrel_offset */ |
| 1167 | |
| 1168 | HOWTO (R_ARM_TLS_LE12, /* type */ |
| 1169 | 0, /* rightshift */ |
| 1170 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1171 | 12, /* bitsize */ |
| 1172 | FALSE, /* pc_relative */ |
| 1173 | 0, /* bitpos */ |
| 1174 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1175 | bfd_elf_generic_reloc, /* special_function */ |
| 1176 | "R_ARM_TLS_LE12", /* name */ |
| 1177 | FALSE, /* partial_inplace */ |
| 1178 | 0x00000fff, /* src_mask */ |
| 1179 | 0x00000fff, /* dst_mask */ |
| 1180 | FALSE), /* pcrel_offset */ |
| 1181 | |
| 1182 | HOWTO (R_ARM_TLS_IE12GP, /* type */ |
| 1183 | 0, /* rightshift */ |
| 1184 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1185 | 12, /* bitsize */ |
| 1186 | FALSE, /* pc_relative */ |
| 1187 | 0, /* bitpos */ |
| 1188 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1189 | bfd_elf_generic_reloc, /* special_function */ |
| 1190 | "R_ARM_TLS_IE12GP", /* name */ |
| 1191 | FALSE, /* partial_inplace */ |
| 1192 | 0x00000fff, /* src_mask */ |
| 1193 | 0x00000fff, /* dst_mask */ |
| 1194 | FALSE), /* pcrel_offset */ |
| 1195 | }; |
| 1196 | |
| 1197 | /* 112-127 private relocations |
| 1198 | 128 R_ARM_ME_TOO, obsolete |
| 1199 | 129-255 unallocated in AAELF. |
| 1200 | |
| 1201 | 249-255 extended, currently unused, relocations: */ |
| 1202 | |
| 1203 | static reloc_howto_type elf32_arm_howto_table_3[4] = |
| 1204 | { |
| 1205 | HOWTO (R_ARM_RREL32, /* type */ |
| 1206 | 0, /* rightshift */ |
| 1207 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1208 | 0, /* bitsize */ |
| 1209 | FALSE, /* pc_relative */ |
| 1210 | 0, /* bitpos */ |
| 1211 | complain_overflow_dont,/* complain_on_overflow */ |
| 1212 | bfd_elf_generic_reloc, /* special_function */ |
| 1213 | "R_ARM_RREL32", /* name */ |
| 1214 | FALSE, /* partial_inplace */ |
| 1215 | 0, /* src_mask */ |
| 1216 | 0, /* dst_mask */ |
| 1217 | FALSE), /* pcrel_offset */ |
| 1218 | |
| 1219 | HOWTO (R_ARM_RABS32, /* type */ |
| 1220 | 0, /* rightshift */ |
| 1221 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1222 | 0, /* bitsize */ |
| 1223 | FALSE, /* pc_relative */ |
| 1224 | 0, /* bitpos */ |
| 1225 | complain_overflow_dont,/* complain_on_overflow */ |
| 1226 | bfd_elf_generic_reloc, /* special_function */ |
| 1227 | "R_ARM_RABS32", /* name */ |
| 1228 | FALSE, /* partial_inplace */ |
| 1229 | 0, /* src_mask */ |
| 1230 | 0, /* dst_mask */ |
| 1231 | FALSE), /* pcrel_offset */ |
| 1232 | |
| 1233 | HOWTO (R_ARM_RPC24, /* type */ |
| 1234 | 0, /* rightshift */ |
| 1235 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1236 | 0, /* bitsize */ |
| 1237 | FALSE, /* pc_relative */ |
| 1238 | 0, /* bitpos */ |
| 1239 | complain_overflow_dont,/* complain_on_overflow */ |
| 1240 | bfd_elf_generic_reloc, /* special_function */ |
| 1241 | "R_ARM_RPC24", /* name */ |
| 1242 | FALSE, /* partial_inplace */ |
| 1243 | 0, /* src_mask */ |
| 1244 | 0, /* dst_mask */ |
| 1245 | FALSE), /* pcrel_offset */ |
| 1246 | |
| 1247 | HOWTO (R_ARM_RBASE, /* type */ |
| 1248 | 0, /* rightshift */ |
| 1249 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1250 | 0, /* bitsize */ |
| 1251 | FALSE, /* pc_relative */ |
| 1252 | 0, /* bitpos */ |
| 1253 | complain_overflow_dont,/* complain_on_overflow */ |
| 1254 | bfd_elf_generic_reloc, /* special_function */ |
| 1255 | "R_ARM_RBASE", /* name */ |
| 1256 | FALSE, /* partial_inplace */ |
| 1257 | 0, /* src_mask */ |
| 1258 | 0, /* dst_mask */ |
| 1259 | FALSE) /* pcrel_offset */ |
| 1260 | }; |
| 1261 | |
| 1262 | static reloc_howto_type * |
| 1263 | elf32_arm_howto_from_type (unsigned int r_type) |
| 1264 | { |
| 1265 | if (r_type < NUM_ELEM (elf32_arm_howto_table_1)) |
| 1266 | return &elf32_arm_howto_table_1[r_type]; |
| 1267 | |
| 1268 | if (r_type >= R_ARM_MOVW_BREL_NC |
| 1269 | && r_type < R_ARM_MOVW_BREL_NC + NUM_ELEM (elf32_arm_howto_table_2)) |
| 1270 | return &elf32_arm_howto_table_2[r_type - R_ARM_MOVW_BREL_NC]; |
| 1271 | |
| 1272 | if (r_type >= R_ARM_RREL32 |
| 1273 | && r_type < R_ARM_RREL32 + NUM_ELEM (elf32_arm_howto_table_2)) |
| 1274 | return &elf32_arm_howto_table_3[r_type - R_ARM_RREL32]; |
| 1275 | |
| 1276 | return NULL; |
| 1277 | } |
| 1278 | |
| 1279 | static void |
| 1280 | elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc, |
| 1281 | Elf_Internal_Rela * elf_reloc) |
| 1282 | { |
| 1283 | unsigned int r_type; |
| 1284 | |
| 1285 | r_type = ELF32_R_TYPE (elf_reloc->r_info); |
| 1286 | bfd_reloc->howto = elf32_arm_howto_from_type (r_type); |
| 1287 | } |
| 1288 | |
| 1289 | struct elf32_arm_reloc_map |
| 1290 | { |
| 1291 | bfd_reloc_code_real_type bfd_reloc_val; |
| 1292 | unsigned char elf_reloc_val; |
| 1293 | }; |
| 1294 | |
| 1295 | /* All entries in this list must also be present in elf32_arm_howto_table. */ |
| 1296 | static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] = |
| 1297 | { |
| 1298 | {BFD_RELOC_NONE, R_ARM_NONE}, |
| 1299 | {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24}, |
| 1300 | {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25}, |
| 1301 | {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22}, |
| 1302 | {BFD_RELOC_32, R_ARM_ABS32}, |
| 1303 | {BFD_RELOC_32_PCREL, R_ARM_REL32}, |
| 1304 | {BFD_RELOC_8, R_ARM_ABS8}, |
| 1305 | {BFD_RELOC_16, R_ARM_ABS16}, |
| 1306 | {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12}, |
| 1307 | {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5}, |
| 1308 | {BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24}, |
| 1309 | {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL}, |
| 1310 | {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11}, |
| 1311 | {BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19}, |
| 1312 | {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8}, |
| 1313 | {BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6}, |
| 1314 | {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT}, |
| 1315 | {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT}, |
| 1316 | {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE}, |
| 1317 | {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32}, |
| 1318 | {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC}, |
| 1319 | {BFD_RELOC_ARM_GOT32, R_ARM_GOT32}, |
| 1320 | {BFD_RELOC_ARM_PLT32, R_ARM_PLT32}, |
| 1321 | {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1}, |
| 1322 | {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32}, |
| 1323 | {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32}, |
| 1324 | {BFD_RELOC_ARM_PREL31, R_ARM_PREL31}, |
| 1325 | {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2}, |
| 1326 | {BFD_RELOC_ARM_PLT32, R_ARM_PLT32}, |
| 1327 | {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32}, |
| 1328 | {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32}, |
| 1329 | {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32}, |
| 1330 | {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32}, |
| 1331 | {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32}, |
| 1332 | {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32}, |
| 1333 | {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32}, |
| 1334 | {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32}, |
| 1335 | {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT}, |
| 1336 | {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY}, |
| 1337 | }; |
| 1338 | |
| 1339 | static reloc_howto_type * |
| 1340 | elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1341 | bfd_reloc_code_real_type code) |
| 1342 | { |
| 1343 | unsigned int i; |
| 1344 | for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++) |
| 1345 | if (elf32_arm_reloc_map[i].bfd_reloc_val == code) |
| 1346 | return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val); |
| 1347 | |
| 1348 | return NULL; |
| 1349 | } |
| 1350 | |
| 1351 | /* Support for core dump NOTE sections */ |
| 1352 | static bfd_boolean |
| 1353 | elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| 1354 | { |
| 1355 | int offset; |
| 1356 | size_t size; |
| 1357 | |
| 1358 | switch (note->descsz) |
| 1359 | { |
| 1360 | default: |
| 1361 | return FALSE; |
| 1362 | |
| 1363 | case 148: /* Linux/ARM 32-bit*/ |
| 1364 | /* pr_cursig */ |
| 1365 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); |
| 1366 | |
| 1367 | /* pr_pid */ |
| 1368 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); |
| 1369 | |
| 1370 | /* pr_reg */ |
| 1371 | offset = 72; |
| 1372 | size = 72; |
| 1373 | |
| 1374 | break; |
| 1375 | } |
| 1376 | |
| 1377 | /* Make a ".reg/999" section. */ |
| 1378 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 1379 | size, note->descpos + offset); |
| 1380 | } |
| 1381 | |
| 1382 | static bfd_boolean |
| 1383 | elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 1384 | { |
| 1385 | switch (note->descsz) |
| 1386 | { |
| 1387 | default: |
| 1388 | return FALSE; |
| 1389 | |
| 1390 | case 124: /* Linux/ARM elf_prpsinfo */ |
| 1391 | elf_tdata (abfd)->core_program |
| 1392 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
| 1393 | elf_tdata (abfd)->core_command |
| 1394 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
| 1395 | } |
| 1396 | |
| 1397 | /* Note that for some reason, a spurious space is tacked |
| 1398 | onto the end of the args in some (at least one anyway) |
| 1399 | implementations, so strip it off if it exists. */ |
| 1400 | |
| 1401 | { |
| 1402 | char *command = elf_tdata (abfd)->core_command; |
| 1403 | int n = strlen (command); |
| 1404 | |
| 1405 | if (0 < n && command[n - 1] == ' ') |
| 1406 | command[n - 1] = '\0'; |
| 1407 | } |
| 1408 | |
| 1409 | return TRUE; |
| 1410 | } |
| 1411 | |
| 1412 | #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec |
| 1413 | #define TARGET_LITTLE_NAME "elf32-littlearm" |
| 1414 | #define TARGET_BIG_SYM bfd_elf32_bigarm_vec |
| 1415 | #define TARGET_BIG_NAME "elf32-bigarm" |
| 1416 | |
| 1417 | #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus |
| 1418 | #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo |
| 1419 | |
| 1420 | typedef unsigned long int insn32; |
| 1421 | typedef unsigned short int insn16; |
| 1422 | |
| 1423 | /* In lieu of proper flags, assume all EABIv4 objects are interworkable. */ |
| 1424 | #define INTERWORK_FLAG(abfd) \ |
| 1425 | (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) == EF_ARM_EABI_VER4 \ |
| 1426 | || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK)) |
| 1427 | |
| 1428 | /* The linker script knows the section names for placement. |
| 1429 | The entry_names are used to do simple name mangling on the stubs. |
| 1430 | Given a function name, and its type, the stub can be found. The |
| 1431 | name can be changed. The only requirement is the %s be present. */ |
| 1432 | #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t" |
| 1433 | #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb" |
| 1434 | |
| 1435 | #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7" |
| 1436 | #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm" |
| 1437 | |
| 1438 | /* The name of the dynamic interpreter. This is put in the .interp |
| 1439 | section. */ |
| 1440 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| 1441 | |
| 1442 | #ifdef FOUR_WORD_PLT |
| 1443 | |
| 1444 | /* The first entry in a procedure linkage table looks like |
| 1445 | this. It is set up so that any shared library function that is |
| 1446 | called before the relocation has been set up calls the dynamic |
| 1447 | linker first. */ |
| 1448 | static const bfd_vma elf32_arm_plt0_entry [] = |
| 1449 | { |
| 1450 | 0xe52de004, /* str lr, [sp, #-4]! */ |
| 1451 | 0xe59fe010, /* ldr lr, [pc, #16] */ |
| 1452 | 0xe08fe00e, /* add lr, pc, lr */ |
| 1453 | 0xe5bef008, /* ldr pc, [lr, #8]! */ |
| 1454 | }; |
| 1455 | |
| 1456 | /* Subsequent entries in a procedure linkage table look like |
| 1457 | this. */ |
| 1458 | static const bfd_vma elf32_arm_plt_entry [] = |
| 1459 | { |
| 1460 | 0xe28fc600, /* add ip, pc, #NN */ |
| 1461 | 0xe28cca00, /* add ip, ip, #NN */ |
| 1462 | 0xe5bcf000, /* ldr pc, [ip, #NN]! */ |
| 1463 | 0x00000000, /* unused */ |
| 1464 | }; |
| 1465 | |
| 1466 | #else |
| 1467 | |
| 1468 | /* The first entry in a procedure linkage table looks like |
| 1469 | this. It is set up so that any shared library function that is |
| 1470 | called before the relocation has been set up calls the dynamic |
| 1471 | linker first. */ |
| 1472 | static const bfd_vma elf32_arm_plt0_entry [] = |
| 1473 | { |
| 1474 | 0xe52de004, /* str lr, [sp, #-4]! */ |
| 1475 | 0xe59fe004, /* ldr lr, [pc, #4] */ |
| 1476 | 0xe08fe00e, /* add lr, pc, lr */ |
| 1477 | 0xe5bef008, /* ldr pc, [lr, #8]! */ |
| 1478 | 0x00000000, /* &GOT[0] - . */ |
| 1479 | }; |
| 1480 | |
| 1481 | /* Subsequent entries in a procedure linkage table look like |
| 1482 | this. */ |
| 1483 | static const bfd_vma elf32_arm_plt_entry [] = |
| 1484 | { |
| 1485 | 0xe28fc600, /* add ip, pc, #0xNN00000 */ |
| 1486 | 0xe28cca00, /* add ip, ip, #0xNN000 */ |
| 1487 | 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */ |
| 1488 | }; |
| 1489 | |
| 1490 | #endif |
| 1491 | |
| 1492 | /* An initial stub used if the PLT entry is referenced from Thumb code. */ |
| 1493 | #define PLT_THUMB_STUB_SIZE 4 |
| 1494 | static const bfd_vma elf32_arm_plt_thumb_stub [] = |
| 1495 | { |
| 1496 | 0x4778, /* bx pc */ |
| 1497 | 0x46c0 /* nop */ |
| 1498 | }; |
| 1499 | |
| 1500 | /* The entries in a PLT when using a DLL-based target with multiple |
| 1501 | address spaces. */ |
| 1502 | static const bfd_vma elf32_arm_symbian_plt_entry [] = |
| 1503 | { |
| 1504 | 0xe51ff004, /* ldr pc, [pc, #-4] */ |
| 1505 | 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */ |
| 1506 | }; |
| 1507 | |
| 1508 | /* Used to build a map of a section. This is required for mixed-endian |
| 1509 | code/data. */ |
| 1510 | |
| 1511 | typedef struct elf32_elf_section_map |
| 1512 | { |
| 1513 | bfd_vma vma; |
| 1514 | char type; |
| 1515 | } |
| 1516 | elf32_arm_section_map; |
| 1517 | |
| 1518 | struct _arm_elf_section_data |
| 1519 | { |
| 1520 | struct bfd_elf_section_data elf; |
| 1521 | int mapcount; |
| 1522 | elf32_arm_section_map *map; |
| 1523 | }; |
| 1524 | |
| 1525 | #define elf32_arm_section_data(sec) \ |
| 1526 | ((struct _arm_elf_section_data *) elf_section_data (sec)) |
| 1527 | |
| 1528 | /* The size of the thread control block. */ |
| 1529 | #define TCB_SIZE 8 |
| 1530 | |
| 1531 | struct elf32_arm_obj_tdata |
| 1532 | { |
| 1533 | struct elf_obj_tdata root; |
| 1534 | |
| 1535 | /* tls_type for each local got entry. */ |
| 1536 | char *local_got_tls_type; |
| 1537 | }; |
| 1538 | |
| 1539 | #define elf32_arm_tdata(abfd) \ |
| 1540 | ((struct elf32_arm_obj_tdata *) (abfd)->tdata.any) |
| 1541 | |
| 1542 | #define elf32_arm_local_got_tls_type(abfd) \ |
| 1543 | (elf32_arm_tdata (abfd)->local_got_tls_type) |
| 1544 | |
| 1545 | static bfd_boolean |
| 1546 | elf32_arm_mkobject (bfd *abfd) |
| 1547 | { |
| 1548 | bfd_size_type amt = sizeof (struct elf32_arm_obj_tdata); |
| 1549 | abfd->tdata.any = bfd_zalloc (abfd, amt); |
| 1550 | if (abfd->tdata.any == NULL) |
| 1551 | return FALSE; |
| 1552 | return TRUE; |
| 1553 | } |
| 1554 | |
| 1555 | /* The ARM linker needs to keep track of the number of relocs that it |
| 1556 | decides to copy in check_relocs for each symbol. This is so that |
| 1557 | it can discard PC relative relocs if it doesn't need them when |
| 1558 | linking with -Bsymbolic. We store the information in a field |
| 1559 | extending the regular ELF linker hash table. */ |
| 1560 | |
| 1561 | /* This structure keeps track of the number of relocs we have copied |
| 1562 | for a given symbol. */ |
| 1563 | struct elf32_arm_relocs_copied |
| 1564 | { |
| 1565 | /* Next section. */ |
| 1566 | struct elf32_arm_relocs_copied * next; |
| 1567 | /* A section in dynobj. */ |
| 1568 | asection * section; |
| 1569 | /* Number of relocs copied in this section. */ |
| 1570 | bfd_size_type count; |
| 1571 | /* Number of PC-relative relocs copied in this section. */ |
| 1572 | bfd_size_type pc_count; |
| 1573 | }; |
| 1574 | |
| 1575 | #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent)) |
| 1576 | |
| 1577 | /* Arm ELF linker hash entry. */ |
| 1578 | struct elf32_arm_link_hash_entry |
| 1579 | { |
| 1580 | struct elf_link_hash_entry root; |
| 1581 | |
| 1582 | /* Number of PC relative relocs copied for this symbol. */ |
| 1583 | struct elf32_arm_relocs_copied * relocs_copied; |
| 1584 | |
| 1585 | /* We reference count Thumb references to a PLT entry separately, |
| 1586 | so that we can emit the Thumb trampoline only if needed. */ |
| 1587 | bfd_signed_vma plt_thumb_refcount; |
| 1588 | |
| 1589 | /* Since PLT entries have variable size if the Thumb prologue is |
| 1590 | used, we need to record the index into .got.plt instead of |
| 1591 | recomputing it from the PLT offset. */ |
| 1592 | bfd_signed_vma plt_got_offset; |
| 1593 | |
| 1594 | #define GOT_UNKNOWN 0 |
| 1595 | #define GOT_NORMAL 1 |
| 1596 | #define GOT_TLS_GD 2 |
| 1597 | #define GOT_TLS_IE 4 |
| 1598 | unsigned char tls_type; |
| 1599 | }; |
| 1600 | |
| 1601 | /* Traverse an arm ELF linker hash table. */ |
| 1602 | #define elf32_arm_link_hash_traverse(table, func, info) \ |
| 1603 | (elf_link_hash_traverse \ |
| 1604 | (&(table)->root, \ |
| 1605 | (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ |
| 1606 | (info))) |
| 1607 | |
| 1608 | /* Get the ARM elf linker hash table from a link_info structure. */ |
| 1609 | #define elf32_arm_hash_table(info) \ |
| 1610 | ((struct elf32_arm_link_hash_table *) ((info)->hash)) |
| 1611 | |
| 1612 | /* ARM ELF linker hash table. */ |
| 1613 | struct elf32_arm_link_hash_table |
| 1614 | { |
| 1615 | /* The main hash table. */ |
| 1616 | struct elf_link_hash_table root; |
| 1617 | |
| 1618 | /* The size in bytes of the section containing the Thumb-to-ARM glue. */ |
| 1619 | bfd_size_type thumb_glue_size; |
| 1620 | |
| 1621 | /* The size in bytes of the section containing the ARM-to-Thumb glue. */ |
| 1622 | bfd_size_type arm_glue_size; |
| 1623 | |
| 1624 | /* An arbitrary input BFD chosen to hold the glue sections. */ |
| 1625 | bfd * bfd_of_glue_owner; |
| 1626 | |
| 1627 | /* Nonzero to output a BE8 image. */ |
| 1628 | int byteswap_code; |
| 1629 | |
| 1630 | /* Zero if R_ARM_TARGET1 means R_ARM_ABS32. |
| 1631 | Nonzero if R_ARM_TARGET1 means R_ARM_ABS32. */ |
| 1632 | int target1_is_rel; |
| 1633 | |
| 1634 | /* The relocation to use for R_ARM_TARGET2 relocations. */ |
| 1635 | int target2_reloc; |
| 1636 | |
| 1637 | /* Nonzero to fix BX instructions for ARMv4 targets. */ |
| 1638 | int fix_v4bx; |
| 1639 | |
| 1640 | /* Nonzero if the ARM/Thumb BLX instructions are available for use. */ |
| 1641 | int use_blx; |
| 1642 | |
| 1643 | /* The number of bytes in the initial entry in the PLT. */ |
| 1644 | bfd_size_type plt_header_size; |
| 1645 | |
| 1646 | /* The number of bytes in the subsequent PLT etries. */ |
| 1647 | bfd_size_type plt_entry_size; |
| 1648 | |
| 1649 | /* True if the target system is Symbian OS. */ |
| 1650 | int symbian_p; |
| 1651 | |
| 1652 | /* True if the target uses REL relocations. */ |
| 1653 | int use_rel; |
| 1654 | |
| 1655 | /* Short-cuts to get to dynamic linker sections. */ |
| 1656 | asection *sgot; |
| 1657 | asection *sgotplt; |
| 1658 | asection *srelgot; |
| 1659 | asection *splt; |
| 1660 | asection *srelplt; |
| 1661 | asection *sdynbss; |
| 1662 | asection *srelbss; |
| 1663 | |
| 1664 | /* Data for R_ARM_TLS_LDM32 relocations. */ |
| 1665 | union { |
| 1666 | bfd_signed_vma refcount; |
| 1667 | bfd_vma offset; |
| 1668 | } tls_ldm_got; |
| 1669 | |
| 1670 | /* Small local sym to section mapping cache. */ |
| 1671 | struct sym_sec_cache sym_sec; |
| 1672 | |
| 1673 | /* For convenience in allocate_dynrelocs. */ |
| 1674 | bfd * obfd; |
| 1675 | }; |
| 1676 | |
| 1677 | /* Create an entry in an ARM ELF linker hash table. */ |
| 1678 | |
| 1679 | static struct bfd_hash_entry * |
| 1680 | elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry, |
| 1681 | struct bfd_hash_table * table, |
| 1682 | const char * string) |
| 1683 | { |
| 1684 | struct elf32_arm_link_hash_entry * ret = |
| 1685 | (struct elf32_arm_link_hash_entry *) entry; |
| 1686 | |
| 1687 | /* Allocate the structure if it has not already been allocated by a |
| 1688 | subclass. */ |
| 1689 | if (ret == (struct elf32_arm_link_hash_entry *) NULL) |
| 1690 | ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry)); |
| 1691 | if (ret == NULL) |
| 1692 | return (struct bfd_hash_entry *) ret; |
| 1693 | |
| 1694 | /* Call the allocation method of the superclass. */ |
| 1695 | ret = ((struct elf32_arm_link_hash_entry *) |
| 1696 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 1697 | table, string)); |
| 1698 | if (ret != NULL) |
| 1699 | { |
| 1700 | ret->relocs_copied = NULL; |
| 1701 | ret->tls_type = GOT_UNKNOWN; |
| 1702 | ret->plt_thumb_refcount = 0; |
| 1703 | ret->plt_got_offset = -1; |
| 1704 | } |
| 1705 | |
| 1706 | return (struct bfd_hash_entry *) ret; |
| 1707 | } |
| 1708 | |
| 1709 | /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up |
| 1710 | shortcuts to them in our hash table. */ |
| 1711 | |
| 1712 | static bfd_boolean |
| 1713 | create_got_section (bfd *dynobj, struct bfd_link_info *info) |
| 1714 | { |
| 1715 | struct elf32_arm_link_hash_table *htab; |
| 1716 | |
| 1717 | htab = elf32_arm_hash_table (info); |
| 1718 | /* BPABI objects never have a GOT, or associated sections. */ |
| 1719 | if (htab->symbian_p) |
| 1720 | return TRUE; |
| 1721 | |
| 1722 | if (! _bfd_elf_create_got_section (dynobj, info)) |
| 1723 | return FALSE; |
| 1724 | |
| 1725 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1726 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 1727 | if (!htab->sgot || !htab->sgotplt) |
| 1728 | abort (); |
| 1729 | |
| 1730 | htab->srelgot = bfd_make_section_with_flags (dynobj, ".rel.got", |
| 1731 | (SEC_ALLOC | SEC_LOAD |
| 1732 | | SEC_HAS_CONTENTS |
| 1733 | | SEC_IN_MEMORY |
| 1734 | | SEC_LINKER_CREATED |
| 1735 | | SEC_READONLY)); |
| 1736 | if (htab->srelgot == NULL |
| 1737 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) |
| 1738 | return FALSE; |
| 1739 | return TRUE; |
| 1740 | } |
| 1741 | |
| 1742 | /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and |
| 1743 | .rel.bss sections in DYNOBJ, and set up shortcuts to them in our |
| 1744 | hash table. */ |
| 1745 | |
| 1746 | static bfd_boolean |
| 1747 | elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
| 1748 | { |
| 1749 | struct elf32_arm_link_hash_table *htab; |
| 1750 | |
| 1751 | htab = elf32_arm_hash_table (info); |
| 1752 | if (!htab->sgot && !create_got_section (dynobj, info)) |
| 1753 | return FALSE; |
| 1754 | |
| 1755 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
| 1756 | return FALSE; |
| 1757 | |
| 1758 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 1759 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt"); |
| 1760 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 1761 | if (!info->shared) |
| 1762 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss"); |
| 1763 | |
| 1764 | if (!htab->splt |
| 1765 | || !htab->srelplt |
| 1766 | || !htab->sdynbss |
| 1767 | || (!info->shared && !htab->srelbss)) |
| 1768 | abort (); |
| 1769 | |
| 1770 | return TRUE; |
| 1771 | } |
| 1772 | |
| 1773 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 1774 | |
| 1775 | static void |
| 1776 | elf32_arm_copy_indirect_symbol (const struct elf_backend_data *bed, |
| 1777 | struct elf_link_hash_entry *dir, |
| 1778 | struct elf_link_hash_entry *ind) |
| 1779 | { |
| 1780 | struct elf32_arm_link_hash_entry *edir, *eind; |
| 1781 | |
| 1782 | edir = (struct elf32_arm_link_hash_entry *) dir; |
| 1783 | eind = (struct elf32_arm_link_hash_entry *) ind; |
| 1784 | |
| 1785 | if (eind->relocs_copied != NULL) |
| 1786 | { |
| 1787 | if (edir->relocs_copied != NULL) |
| 1788 | { |
| 1789 | struct elf32_arm_relocs_copied **pp; |
| 1790 | struct elf32_arm_relocs_copied *p; |
| 1791 | |
| 1792 | if (ind->root.type == bfd_link_hash_indirect) |
| 1793 | abort (); |
| 1794 | |
| 1795 | /* Add reloc counts against the weak sym to the strong sym |
| 1796 | list. Merge any entries against the same section. */ |
| 1797 | for (pp = &eind->relocs_copied; (p = *pp) != NULL; ) |
| 1798 | { |
| 1799 | struct elf32_arm_relocs_copied *q; |
| 1800 | |
| 1801 | for (q = edir->relocs_copied; q != NULL; q = q->next) |
| 1802 | if (q->section == p->section) |
| 1803 | { |
| 1804 | q->pc_count += p->pc_count; |
| 1805 | q->count += p->count; |
| 1806 | *pp = p->next; |
| 1807 | break; |
| 1808 | } |
| 1809 | if (q == NULL) |
| 1810 | pp = &p->next; |
| 1811 | } |
| 1812 | *pp = edir->relocs_copied; |
| 1813 | } |
| 1814 | |
| 1815 | edir->relocs_copied = eind->relocs_copied; |
| 1816 | eind->relocs_copied = NULL; |
| 1817 | } |
| 1818 | |
| 1819 | /* If the direct symbol already has an associated PLT entry, the |
| 1820 | indirect symbol should not. If it doesn't, swap refcount information |
| 1821 | from the indirect symbol. */ |
| 1822 | if (edir->plt_thumb_refcount == 0) |
| 1823 | { |
| 1824 | edir->plt_thumb_refcount = eind->plt_thumb_refcount; |
| 1825 | eind->plt_thumb_refcount = 0; |
| 1826 | } |
| 1827 | else |
| 1828 | BFD_ASSERT (eind->plt_thumb_refcount == 0); |
| 1829 | |
| 1830 | if (ind->root.type == bfd_link_hash_indirect |
| 1831 | && dir->got.refcount <= 0) |
| 1832 | { |
| 1833 | edir->tls_type = eind->tls_type; |
| 1834 | eind->tls_type = GOT_UNKNOWN; |
| 1835 | } |
| 1836 | |
| 1837 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); |
| 1838 | } |
| 1839 | |
| 1840 | /* Create an ARM elf linker hash table. */ |
| 1841 | |
| 1842 | static struct bfd_link_hash_table * |
| 1843 | elf32_arm_link_hash_table_create (bfd *abfd) |
| 1844 | { |
| 1845 | struct elf32_arm_link_hash_table *ret; |
| 1846 | bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table); |
| 1847 | |
| 1848 | ret = bfd_malloc (amt); |
| 1849 | if (ret == NULL) |
| 1850 | return NULL; |
| 1851 | |
| 1852 | if (!_bfd_elf_link_hash_table_init (& ret->root, abfd, |
| 1853 | elf32_arm_link_hash_newfunc)) |
| 1854 | { |
| 1855 | free (ret); |
| 1856 | return NULL; |
| 1857 | } |
| 1858 | |
| 1859 | ret->sgot = NULL; |
| 1860 | ret->sgotplt = NULL; |
| 1861 | ret->srelgot = NULL; |
| 1862 | ret->splt = NULL; |
| 1863 | ret->srelplt = NULL; |
| 1864 | ret->sdynbss = NULL; |
| 1865 | ret->srelbss = NULL; |
| 1866 | ret->thumb_glue_size = 0; |
| 1867 | ret->arm_glue_size = 0; |
| 1868 | ret->bfd_of_glue_owner = NULL; |
| 1869 | ret->byteswap_code = 0; |
| 1870 | ret->target1_is_rel = 0; |
| 1871 | ret->target2_reloc = R_ARM_NONE; |
| 1872 | #ifdef FOUR_WORD_PLT |
| 1873 | ret->plt_header_size = 16; |
| 1874 | ret->plt_entry_size = 16; |
| 1875 | #else |
| 1876 | ret->plt_header_size = 20; |
| 1877 | ret->plt_entry_size = 12; |
| 1878 | #endif |
| 1879 | ret->fix_v4bx = 0; |
| 1880 | ret->use_blx = 0; |
| 1881 | ret->symbian_p = 0; |
| 1882 | ret->use_rel = 1; |
| 1883 | ret->sym_sec.abfd = NULL; |
| 1884 | ret->obfd = abfd; |
| 1885 | ret->tls_ldm_got.refcount = 0; |
| 1886 | |
| 1887 | return &ret->root.root; |
| 1888 | } |
| 1889 | |
| 1890 | /* Locate the Thumb encoded calling stub for NAME. */ |
| 1891 | |
| 1892 | static struct elf_link_hash_entry * |
| 1893 | find_thumb_glue (struct bfd_link_info *link_info, |
| 1894 | const char *name, |
| 1895 | bfd *input_bfd) |
| 1896 | { |
| 1897 | char *tmp_name; |
| 1898 | struct elf_link_hash_entry *hash; |
| 1899 | struct elf32_arm_link_hash_table *hash_table; |
| 1900 | |
| 1901 | /* We need a pointer to the armelf specific hash table. */ |
| 1902 | hash_table = elf32_arm_hash_table (link_info); |
| 1903 | |
| 1904 | tmp_name = bfd_malloc ((bfd_size_type) strlen (name) |
| 1905 | + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); |
| 1906 | |
| 1907 | BFD_ASSERT (tmp_name); |
| 1908 | |
| 1909 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); |
| 1910 | |
| 1911 | hash = elf_link_hash_lookup |
| 1912 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
| 1913 | |
| 1914 | if (hash == NULL) |
| 1915 | /* xgettext:c-format */ |
| 1916 | (*_bfd_error_handler) (_("%B: unable to find THUMB glue '%s' for `%s'"), |
| 1917 | input_bfd, tmp_name, name); |
| 1918 | |
| 1919 | free (tmp_name); |
| 1920 | |
| 1921 | return hash; |
| 1922 | } |
| 1923 | |
| 1924 | /* Locate the ARM encoded calling stub for NAME. */ |
| 1925 | |
| 1926 | static struct elf_link_hash_entry * |
| 1927 | find_arm_glue (struct bfd_link_info *link_info, |
| 1928 | const char *name, |
| 1929 | bfd *input_bfd) |
| 1930 | { |
| 1931 | char *tmp_name; |
| 1932 | struct elf_link_hash_entry *myh; |
| 1933 | struct elf32_arm_link_hash_table *hash_table; |
| 1934 | |
| 1935 | /* We need a pointer to the elfarm specific hash table. */ |
| 1936 | hash_table = elf32_arm_hash_table (link_info); |
| 1937 | |
| 1938 | tmp_name = bfd_malloc ((bfd_size_type) strlen (name) |
| 1939 | + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); |
| 1940 | |
| 1941 | BFD_ASSERT (tmp_name); |
| 1942 | |
| 1943 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); |
| 1944 | |
| 1945 | myh = elf_link_hash_lookup |
| 1946 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
| 1947 | |
| 1948 | if (myh == NULL) |
| 1949 | /* xgettext:c-format */ |
| 1950 | (*_bfd_error_handler) (_("%B: unable to find ARM glue '%s' for `%s'"), |
| 1951 | input_bfd, tmp_name, name); |
| 1952 | |
| 1953 | free (tmp_name); |
| 1954 | |
| 1955 | return myh; |
| 1956 | } |
| 1957 | |
| 1958 | /* ARM->Thumb glue (static images): |
| 1959 | |
| 1960 | .arm |
| 1961 | __func_from_arm: |
| 1962 | ldr r12, __func_addr |
| 1963 | bx r12 |
| 1964 | __func_addr: |
| 1965 | .word func @ behave as if you saw a ARM_32 reloc. |
| 1966 | |
| 1967 | (relocatable images) |
| 1968 | .arm |
| 1969 | __func_from_arm: |
| 1970 | ldr r12, __func_offset |
| 1971 | add r12, r12, pc |
| 1972 | bx r12 |
| 1973 | __func_offset: |
| 1974 | .word func - . |
| 1975 | */ |
| 1976 | |
| 1977 | #define ARM2THUMB_STATIC_GLUE_SIZE 12 |
| 1978 | static const insn32 a2t1_ldr_insn = 0xe59fc000; |
| 1979 | static const insn32 a2t2_bx_r12_insn = 0xe12fff1c; |
| 1980 | static const insn32 a2t3_func_addr_insn = 0x00000001; |
| 1981 | |
| 1982 | #define ARM2THUMB_PIC_GLUE_SIZE 16 |
| 1983 | static const insn32 a2t1p_ldr_insn = 0xe59fc004; |
| 1984 | static const insn32 a2t2p_add_pc_insn = 0xe08cc00f; |
| 1985 | static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c; |
| 1986 | |
| 1987 | /* Thumb->ARM: Thumb->(non-interworking aware) ARM |
| 1988 | |
| 1989 | .thumb .thumb |
| 1990 | .align 2 .align 2 |
| 1991 | __func_from_thumb: __func_from_thumb: |
| 1992 | bx pc push {r6, lr} |
| 1993 | nop ldr r6, __func_addr |
| 1994 | .arm mov lr, pc |
| 1995 | __func_change_to_arm: bx r6 |
| 1996 | b func .arm |
| 1997 | __func_back_to_thumb: |
| 1998 | ldmia r13! {r6, lr} |
| 1999 | bx lr |
| 2000 | __func_addr: |
| 2001 | .word func */ |
| 2002 | |
| 2003 | #define THUMB2ARM_GLUE_SIZE 8 |
| 2004 | static const insn16 t2a1_bx_pc_insn = 0x4778; |
| 2005 | static const insn16 t2a2_noop_insn = 0x46c0; |
| 2006 | static const insn32 t2a3_b_insn = 0xea000000; |
| 2007 | |
| 2008 | #ifndef ELFARM_NABI_C_INCLUDED |
| 2009 | bfd_boolean |
| 2010 | bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info) |
| 2011 | { |
| 2012 | asection * s; |
| 2013 | bfd_byte * foo; |
| 2014 | struct elf32_arm_link_hash_table * globals; |
| 2015 | |
| 2016 | globals = elf32_arm_hash_table (info); |
| 2017 | |
| 2018 | BFD_ASSERT (globals != NULL); |
| 2019 | |
| 2020 | if (globals->arm_glue_size != 0) |
| 2021 | { |
| 2022 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 2023 | |
| 2024 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, |
| 2025 | ARM2THUMB_GLUE_SECTION_NAME); |
| 2026 | |
| 2027 | BFD_ASSERT (s != NULL); |
| 2028 | |
| 2029 | foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size); |
| 2030 | |
| 2031 | s->size = globals->arm_glue_size; |
| 2032 | s->contents = foo; |
| 2033 | } |
| 2034 | |
| 2035 | if (globals->thumb_glue_size != 0) |
| 2036 | { |
| 2037 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 2038 | |
| 2039 | s = bfd_get_section_by_name |
| 2040 | (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); |
| 2041 | |
| 2042 | BFD_ASSERT (s != NULL); |
| 2043 | |
| 2044 | foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size); |
| 2045 | |
| 2046 | s->size = globals->thumb_glue_size; |
| 2047 | s->contents = foo; |
| 2048 | } |
| 2049 | |
| 2050 | return TRUE; |
| 2051 | } |
| 2052 | |
| 2053 | static void |
| 2054 | record_arm_to_thumb_glue (struct bfd_link_info * link_info, |
| 2055 | struct elf_link_hash_entry * h) |
| 2056 | { |
| 2057 | const char * name = h->root.root.string; |
| 2058 | asection * s; |
| 2059 | char * tmp_name; |
| 2060 | struct elf_link_hash_entry * myh; |
| 2061 | struct bfd_link_hash_entry * bh; |
| 2062 | struct elf32_arm_link_hash_table * globals; |
| 2063 | bfd_vma val; |
| 2064 | |
| 2065 | globals = elf32_arm_hash_table (link_info); |
| 2066 | |
| 2067 | BFD_ASSERT (globals != NULL); |
| 2068 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 2069 | |
| 2070 | s = bfd_get_section_by_name |
| 2071 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); |
| 2072 | |
| 2073 | BFD_ASSERT (s != NULL); |
| 2074 | |
| 2075 | tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); |
| 2076 | |
| 2077 | BFD_ASSERT (tmp_name); |
| 2078 | |
| 2079 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); |
| 2080 | |
| 2081 | myh = elf_link_hash_lookup |
| 2082 | (&(globals)->root, tmp_name, FALSE, FALSE, TRUE); |
| 2083 | |
| 2084 | if (myh != NULL) |
| 2085 | { |
| 2086 | /* We've already seen this guy. */ |
| 2087 | free (tmp_name); |
| 2088 | return; |
| 2089 | } |
| 2090 | |
| 2091 | /* The only trick here is using hash_table->arm_glue_size as the value. |
| 2092 | Even though the section isn't allocated yet, this is where we will be |
| 2093 | putting it. */ |
| 2094 | bh = NULL; |
| 2095 | val = globals->arm_glue_size + 1; |
| 2096 | _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner, |
| 2097 | tmp_name, BSF_GLOBAL, s, val, |
| 2098 | NULL, TRUE, FALSE, &bh); |
| 2099 | |
| 2100 | myh = (struct elf_link_hash_entry *) bh; |
| 2101 | myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC); |
| 2102 | myh->forced_local = 1; |
| 2103 | |
| 2104 | free (tmp_name); |
| 2105 | |
| 2106 | if ((link_info->shared || globals->root.is_relocatable_executable)) |
| 2107 | globals->arm_glue_size += ARM2THUMB_PIC_GLUE_SIZE; |
| 2108 | else |
| 2109 | globals->arm_glue_size += ARM2THUMB_STATIC_GLUE_SIZE; |
| 2110 | |
| 2111 | return; |
| 2112 | } |
| 2113 | |
| 2114 | static void |
| 2115 | record_thumb_to_arm_glue (struct bfd_link_info *link_info, |
| 2116 | struct elf_link_hash_entry *h) |
| 2117 | { |
| 2118 | const char *name = h->root.root.string; |
| 2119 | asection *s; |
| 2120 | char *tmp_name; |
| 2121 | struct elf_link_hash_entry *myh; |
| 2122 | struct bfd_link_hash_entry *bh; |
| 2123 | struct elf32_arm_link_hash_table *hash_table; |
| 2124 | bfd_vma val; |
| 2125 | |
| 2126 | hash_table = elf32_arm_hash_table (link_info); |
| 2127 | |
| 2128 | BFD_ASSERT (hash_table != NULL); |
| 2129 | BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL); |
| 2130 | |
| 2131 | s = bfd_get_section_by_name |
| 2132 | (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); |
| 2133 | |
| 2134 | BFD_ASSERT (s != NULL); |
| 2135 | |
| 2136 | tmp_name = bfd_malloc ((bfd_size_type) strlen (name) |
| 2137 | + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); |
| 2138 | |
| 2139 | BFD_ASSERT (tmp_name); |
| 2140 | |
| 2141 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); |
| 2142 | |
| 2143 | myh = elf_link_hash_lookup |
| 2144 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
| 2145 | |
| 2146 | if (myh != NULL) |
| 2147 | { |
| 2148 | /* We've already seen this guy. */ |
| 2149 | free (tmp_name); |
| 2150 | return; |
| 2151 | } |
| 2152 | |
| 2153 | bh = NULL; |
| 2154 | val = hash_table->thumb_glue_size + 1; |
| 2155 | _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, |
| 2156 | tmp_name, BSF_GLOBAL, s, val, |
| 2157 | NULL, TRUE, FALSE, &bh); |
| 2158 | |
| 2159 | /* If we mark it 'Thumb', the disassembler will do a better job. */ |
| 2160 | myh = (struct elf_link_hash_entry *) bh; |
| 2161 | myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC); |
| 2162 | myh->forced_local = 1; |
| 2163 | |
| 2164 | free (tmp_name); |
| 2165 | |
| 2166 | #define CHANGE_TO_ARM "__%s_change_to_arm" |
| 2167 | #define BACK_FROM_ARM "__%s_back_from_arm" |
| 2168 | |
| 2169 | /* Allocate another symbol to mark where we switch to Arm mode. */ |
| 2170 | tmp_name = bfd_malloc ((bfd_size_type) strlen (name) |
| 2171 | + strlen (CHANGE_TO_ARM) + 1); |
| 2172 | |
| 2173 | BFD_ASSERT (tmp_name); |
| 2174 | |
| 2175 | sprintf (tmp_name, CHANGE_TO_ARM, name); |
| 2176 | |
| 2177 | bh = NULL; |
| 2178 | val = hash_table->thumb_glue_size + 4, |
| 2179 | _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, |
| 2180 | tmp_name, BSF_LOCAL, s, val, |
| 2181 | NULL, TRUE, FALSE, &bh); |
| 2182 | |
| 2183 | free (tmp_name); |
| 2184 | |
| 2185 | hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE; |
| 2186 | |
| 2187 | return; |
| 2188 | } |
| 2189 | |
| 2190 | /* Add the glue sections to ABFD. This function is called from the |
| 2191 | linker scripts in ld/emultempl/{armelf}.em. */ |
| 2192 | |
| 2193 | bfd_boolean |
| 2194 | bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd, |
| 2195 | struct bfd_link_info *info) |
| 2196 | { |
| 2197 | flagword flags; |
| 2198 | asection *sec; |
| 2199 | |
| 2200 | /* If we are only performing a partial |
| 2201 | link do not bother adding the glue. */ |
| 2202 | if (info->relocatable) |
| 2203 | return TRUE; |
| 2204 | |
| 2205 | sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME); |
| 2206 | |
| 2207 | if (sec == NULL) |
| 2208 | { |
| 2209 | /* Note: we do not include the flag SEC_LINKER_CREATED, as this |
| 2210 | will prevent elf_link_input_bfd() from processing the contents |
| 2211 | of this section. */ |
| 2212 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY; |
| 2213 | |
| 2214 | sec = bfd_make_section_with_flags (abfd, |
| 2215 | ARM2THUMB_GLUE_SECTION_NAME, |
| 2216 | flags); |
| 2217 | |
| 2218 | if (sec == NULL |
| 2219 | || !bfd_set_section_alignment (abfd, sec, 2)) |
| 2220 | return FALSE; |
| 2221 | |
| 2222 | /* Set the gc mark to prevent the section from being removed by garbage |
| 2223 | collection, despite the fact that no relocs refer to this section. */ |
| 2224 | sec->gc_mark = 1; |
| 2225 | } |
| 2226 | |
| 2227 | sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME); |
| 2228 | |
| 2229 | if (sec == NULL) |
| 2230 | { |
| 2231 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 2232 | | SEC_CODE | SEC_READONLY; |
| 2233 | |
| 2234 | sec = bfd_make_section_with_flags (abfd, |
| 2235 | THUMB2ARM_GLUE_SECTION_NAME, |
| 2236 | flags); |
| 2237 | |
| 2238 | if (sec == NULL |
| 2239 | || !bfd_set_section_alignment (abfd, sec, 2)) |
| 2240 | return FALSE; |
| 2241 | |
| 2242 | sec->gc_mark = 1; |
| 2243 | } |
| 2244 | |
| 2245 | return TRUE; |
| 2246 | } |
| 2247 | |
| 2248 | /* Select a BFD to be used to hold the sections used by the glue code. |
| 2249 | This function is called from the linker scripts in ld/emultempl/ |
| 2250 | {armelf/pe}.em */ |
| 2251 | |
| 2252 | bfd_boolean |
| 2253 | bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info) |
| 2254 | { |
| 2255 | struct elf32_arm_link_hash_table *globals; |
| 2256 | |
| 2257 | /* If we are only performing a partial link |
| 2258 | do not bother getting a bfd to hold the glue. */ |
| 2259 | if (info->relocatable) |
| 2260 | return TRUE; |
| 2261 | |
| 2262 | /* Make sure we don't attach the glue sections to a dynamic object. */ |
| 2263 | BFD_ASSERT (!(abfd->flags & DYNAMIC)); |
| 2264 | |
| 2265 | globals = elf32_arm_hash_table (info); |
| 2266 | |
| 2267 | BFD_ASSERT (globals != NULL); |
| 2268 | |
| 2269 | if (globals->bfd_of_glue_owner != NULL) |
| 2270 | return TRUE; |
| 2271 | |
| 2272 | /* Save the bfd for later use. */ |
| 2273 | globals->bfd_of_glue_owner = abfd; |
| 2274 | |
| 2275 | return TRUE; |
| 2276 | } |
| 2277 | |
| 2278 | bfd_boolean |
| 2279 | bfd_elf32_arm_process_before_allocation (bfd *abfd, |
| 2280 | struct bfd_link_info *link_info, |
| 2281 | int byteswap_code) |
| 2282 | { |
| 2283 | Elf_Internal_Shdr *symtab_hdr; |
| 2284 | Elf_Internal_Rela *internal_relocs = NULL; |
| 2285 | Elf_Internal_Rela *irel, *irelend; |
| 2286 | bfd_byte *contents = NULL; |
| 2287 | |
| 2288 | asection *sec; |
| 2289 | struct elf32_arm_link_hash_table *globals; |
| 2290 | |
| 2291 | /* If we are only performing a partial link do not bother |
| 2292 | to construct any glue. */ |
| 2293 | if (link_info->relocatable) |
| 2294 | return TRUE; |
| 2295 | |
| 2296 | /* Here we have a bfd that is to be included on the link. We have a hook |
| 2297 | to do reloc rummaging, before section sizes are nailed down. */ |
| 2298 | globals = elf32_arm_hash_table (link_info); |
| 2299 | |
| 2300 | BFD_ASSERT (globals != NULL); |
| 2301 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 2302 | |
| 2303 | if (byteswap_code && !bfd_big_endian (abfd)) |
| 2304 | { |
| 2305 | _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."), |
| 2306 | abfd); |
| 2307 | return FALSE; |
| 2308 | } |
| 2309 | globals->byteswap_code = byteswap_code; |
| 2310 | |
| 2311 | /* Rummage around all the relocs and map the glue vectors. */ |
| 2312 | sec = abfd->sections; |
| 2313 | |
| 2314 | if (sec == NULL) |
| 2315 | return TRUE; |
| 2316 | |
| 2317 | for (; sec != NULL; sec = sec->next) |
| 2318 | { |
| 2319 | if (sec->reloc_count == 0) |
| 2320 | continue; |
| 2321 | |
| 2322 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 2323 | |
| 2324 | /* Load the relocs. */ |
| 2325 | internal_relocs |
| 2326 | = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL, |
| 2327 | (Elf_Internal_Rela *) NULL, FALSE); |
| 2328 | |
| 2329 | if (internal_relocs == NULL) |
| 2330 | goto error_return; |
| 2331 | |
| 2332 | irelend = internal_relocs + sec->reloc_count; |
| 2333 | for (irel = internal_relocs; irel < irelend; irel++) |
| 2334 | { |
| 2335 | long r_type; |
| 2336 | unsigned long r_index; |
| 2337 | |
| 2338 | struct elf_link_hash_entry *h; |
| 2339 | |
| 2340 | r_type = ELF32_R_TYPE (irel->r_info); |
| 2341 | r_index = ELF32_R_SYM (irel->r_info); |
| 2342 | |
| 2343 | /* These are the only relocation types we care about. */ |
| 2344 | if ( r_type != R_ARM_PC24 |
| 2345 | && r_type != R_ARM_PLT32 |
| 2346 | && r_type != R_ARM_CALL |
| 2347 | && r_type != R_ARM_JUMP24 |
| 2348 | && r_type != R_ARM_THM_CALL) |
| 2349 | continue; |
| 2350 | |
| 2351 | /* Get the section contents if we haven't done so already. */ |
| 2352 | if (contents == NULL) |
| 2353 | { |
| 2354 | /* Get cached copy if it exists. */ |
| 2355 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 2356 | contents = elf_section_data (sec)->this_hdr.contents; |
| 2357 | else |
| 2358 | { |
| 2359 | /* Go get them off disk. */ |
| 2360 | if (! bfd_malloc_and_get_section (abfd, sec, &contents)) |
| 2361 | goto error_return; |
| 2362 | } |
| 2363 | } |
| 2364 | |
| 2365 | /* If the relocation is not against a symbol it cannot concern us. */ |
| 2366 | h = NULL; |
| 2367 | |
| 2368 | /* We don't care about local symbols. */ |
| 2369 | if (r_index < symtab_hdr->sh_info) |
| 2370 | continue; |
| 2371 | |
| 2372 | /* This is an external symbol. */ |
| 2373 | r_index -= symtab_hdr->sh_info; |
| 2374 | h = (struct elf_link_hash_entry *) |
| 2375 | elf_sym_hashes (abfd)[r_index]; |
| 2376 | |
| 2377 | /* If the relocation is against a static symbol it must be within |
| 2378 | the current section and so cannot be a cross ARM/Thumb relocation. */ |
| 2379 | if (h == NULL) |
| 2380 | continue; |
| 2381 | |
| 2382 | /* If the call will go through a PLT entry then we do not need |
| 2383 | glue. */ |
| 2384 | if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1) |
| 2385 | continue; |
| 2386 | |
| 2387 | switch (r_type) |
| 2388 | { |
| 2389 | case R_ARM_PC24: |
| 2390 | case R_ARM_PLT32: |
| 2391 | case R_ARM_CALL: |
| 2392 | case R_ARM_JUMP24: |
| 2393 | /* This one is a call from arm code. We need to look up |
| 2394 | the target of the call. If it is a thumb target, we |
| 2395 | insert glue. */ |
| 2396 | if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC) |
| 2397 | record_arm_to_thumb_glue (link_info, h); |
| 2398 | break; |
| 2399 | |
| 2400 | case R_ARM_THM_CALL: |
| 2401 | /* This one is a call from thumb code. We look |
| 2402 | up the target of the call. If it is not a thumb |
| 2403 | target, we insert glue. */ |
| 2404 | if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC) |
| 2405 | record_thumb_to_arm_glue (link_info, h); |
| 2406 | break; |
| 2407 | |
| 2408 | default: |
| 2409 | abort (); |
| 2410 | } |
| 2411 | } |
| 2412 | |
| 2413 | if (contents != NULL |
| 2414 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 2415 | free (contents); |
| 2416 | contents = NULL; |
| 2417 | |
| 2418 | if (internal_relocs != NULL |
| 2419 | && elf_section_data (sec)->relocs != internal_relocs) |
| 2420 | free (internal_relocs); |
| 2421 | internal_relocs = NULL; |
| 2422 | } |
| 2423 | |
| 2424 | return TRUE; |
| 2425 | |
| 2426 | error_return: |
| 2427 | if (contents != NULL |
| 2428 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 2429 | free (contents); |
| 2430 | if (internal_relocs != NULL |
| 2431 | && elf_section_data (sec)->relocs != internal_relocs) |
| 2432 | free (internal_relocs); |
| 2433 | |
| 2434 | return FALSE; |
| 2435 | } |
| 2436 | #endif |
| 2437 | |
| 2438 | |
| 2439 | /* Set target relocation values needed during linking. */ |
| 2440 | |
| 2441 | void |
| 2442 | bfd_elf32_arm_set_target_relocs (struct bfd_link_info *link_info, |
| 2443 | int target1_is_rel, |
| 2444 | char * target2_type, |
| 2445 | int fix_v4bx, |
| 2446 | int use_blx) |
| 2447 | { |
| 2448 | struct elf32_arm_link_hash_table *globals; |
| 2449 | |
| 2450 | globals = elf32_arm_hash_table (link_info); |
| 2451 | |
| 2452 | globals->target1_is_rel = target1_is_rel; |
| 2453 | if (strcmp (target2_type, "rel") == 0) |
| 2454 | globals->target2_reloc = R_ARM_REL32; |
| 2455 | else if (strcmp (target2_type, "abs") == 0) |
| 2456 | globals->target2_reloc = R_ARM_ABS32; |
| 2457 | else if (strcmp (target2_type, "got-rel") == 0) |
| 2458 | globals->target2_reloc = R_ARM_GOT_PREL; |
| 2459 | else |
| 2460 | { |
| 2461 | _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."), |
| 2462 | target2_type); |
| 2463 | } |
| 2464 | globals->fix_v4bx = fix_v4bx; |
| 2465 | globals->use_blx |= use_blx; |
| 2466 | } |
| 2467 | |
| 2468 | /* The thumb form of a long branch is a bit finicky, because the offset |
| 2469 | encoding is split over two fields, each in it's own instruction. They |
| 2470 | can occur in any order. So given a thumb form of long branch, and an |
| 2471 | offset, insert the offset into the thumb branch and return finished |
| 2472 | instruction. |
| 2473 | |
| 2474 | It takes two thumb instructions to encode the target address. Each has |
| 2475 | 11 bits to invest. The upper 11 bits are stored in one (identified by |
| 2476 | H-0.. see below), the lower 11 bits are stored in the other (identified |
| 2477 | by H-1). |
| 2478 | |
| 2479 | Combine together and shifted left by 1 (it's a half word address) and |
| 2480 | there you have it. |
| 2481 | |
| 2482 | Op: 1111 = F, |
| 2483 | H-0, upper address-0 = 000 |
| 2484 | Op: 1111 = F, |
| 2485 | H-1, lower address-0 = 800 |
| 2486 | |
| 2487 | They can be ordered either way, but the arm tools I've seen always put |
| 2488 | the lower one first. It probably doesn't matter. krk@cygnus.com |
| 2489 | |
| 2490 | XXX: Actually the order does matter. The second instruction (H-1) |
| 2491 | moves the computed address into the PC, so it must be the second one |
| 2492 | in the sequence. The problem, however is that whilst little endian code |
| 2493 | stores the instructions in HI then LOW order, big endian code does the |
| 2494 | reverse. nickc@cygnus.com. */ |
| 2495 | |
| 2496 | #define LOW_HI_ORDER 0xF800F000 |
| 2497 | #define HI_LOW_ORDER 0xF000F800 |
| 2498 | |
| 2499 | static insn32 |
| 2500 | insert_thumb_branch (insn32 br_insn, int rel_off) |
| 2501 | { |
| 2502 | unsigned int low_bits; |
| 2503 | unsigned int high_bits; |
| 2504 | |
| 2505 | BFD_ASSERT ((rel_off & 1) != 1); |
| 2506 | |
| 2507 | rel_off >>= 1; /* Half word aligned address. */ |
| 2508 | low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */ |
| 2509 | high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */ |
| 2510 | |
| 2511 | if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER) |
| 2512 | br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits; |
| 2513 | else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER) |
| 2514 | br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits; |
| 2515 | else |
| 2516 | /* FIXME: abort is probably not the right call. krk@cygnus.com */ |
| 2517 | abort (); /* Error - not a valid branch instruction form. */ |
| 2518 | |
| 2519 | return br_insn; |
| 2520 | } |
| 2521 | |
| 2522 | /* Thumb code calling an ARM function. */ |
| 2523 | |
| 2524 | static int |
| 2525 | elf32_thumb_to_arm_stub (struct bfd_link_info * info, |
| 2526 | const char * name, |
| 2527 | bfd * input_bfd, |
| 2528 | bfd * output_bfd, |
| 2529 | asection * input_section, |
| 2530 | bfd_byte * hit_data, |
| 2531 | asection * sym_sec, |
| 2532 | bfd_vma offset, |
| 2533 | bfd_signed_vma addend, |
| 2534 | bfd_vma val) |
| 2535 | { |
| 2536 | asection * s = 0; |
| 2537 | bfd_vma my_offset; |
| 2538 | unsigned long int tmp; |
| 2539 | long int ret_offset; |
| 2540 | struct elf_link_hash_entry * myh; |
| 2541 | struct elf32_arm_link_hash_table * globals; |
| 2542 | |
| 2543 | myh = find_thumb_glue (info, name, input_bfd); |
| 2544 | if (myh == NULL) |
| 2545 | return FALSE; |
| 2546 | |
| 2547 | globals = elf32_arm_hash_table (info); |
| 2548 | |
| 2549 | BFD_ASSERT (globals != NULL); |
| 2550 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 2551 | |
| 2552 | my_offset = myh->root.u.def.value; |
| 2553 | |
| 2554 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, |
| 2555 | THUMB2ARM_GLUE_SECTION_NAME); |
| 2556 | |
| 2557 | BFD_ASSERT (s != NULL); |
| 2558 | BFD_ASSERT (s->contents != NULL); |
| 2559 | BFD_ASSERT (s->output_section != NULL); |
| 2560 | |
| 2561 | if ((my_offset & 0x01) == 0x01) |
| 2562 | { |
| 2563 | if (sym_sec != NULL |
| 2564 | && sym_sec->owner != NULL |
| 2565 | && !INTERWORK_FLAG (sym_sec->owner)) |
| 2566 | { |
| 2567 | (*_bfd_error_handler) |
| 2568 | (_("%B(%s): warning: interworking not enabled.\n" |
| 2569 | " first occurrence: %B: thumb call to arm"), |
| 2570 | sym_sec->owner, input_bfd, name); |
| 2571 | |
| 2572 | return FALSE; |
| 2573 | } |
| 2574 | |
| 2575 | --my_offset; |
| 2576 | myh->root.u.def.value = my_offset; |
| 2577 | |
| 2578 | bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn, |
| 2579 | s->contents + my_offset); |
| 2580 | |
| 2581 | bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn, |
| 2582 | s->contents + my_offset + 2); |
| 2583 | |
| 2584 | ret_offset = |
| 2585 | /* Address of destination of the stub. */ |
| 2586 | ((bfd_signed_vma) val) |
| 2587 | - ((bfd_signed_vma) |
| 2588 | /* Offset from the start of the current section |
| 2589 | to the start of the stubs. */ |
| 2590 | (s->output_offset |
| 2591 | /* Offset of the start of this stub from the start of the stubs. */ |
| 2592 | + my_offset |
| 2593 | /* Address of the start of the current section. */ |
| 2594 | + s->output_section->vma) |
| 2595 | /* The branch instruction is 4 bytes into the stub. */ |
| 2596 | + 4 |
| 2597 | /* ARM branches work from the pc of the instruction + 8. */ |
| 2598 | + 8); |
| 2599 | |
| 2600 | bfd_put_32 (output_bfd, |
| 2601 | (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF), |
| 2602 | s->contents + my_offset + 4); |
| 2603 | } |
| 2604 | |
| 2605 | BFD_ASSERT (my_offset <= globals->thumb_glue_size); |
| 2606 | |
| 2607 | /* Now go back and fix up the original BL insn to point to here. */ |
| 2608 | ret_offset = |
| 2609 | /* Address of where the stub is located. */ |
| 2610 | (s->output_section->vma + s->output_offset + my_offset) |
| 2611 | /* Address of where the BL is located. */ |
| 2612 | - (input_section->output_section->vma + input_section->output_offset |
| 2613 | + offset) |
| 2614 | /* Addend in the relocation. */ |
| 2615 | - addend |
| 2616 | /* Biassing for PC-relative addressing. */ |
| 2617 | - 8; |
| 2618 | |
| 2619 | tmp = bfd_get_32 (input_bfd, hit_data |
| 2620 | - input_section->vma); |
| 2621 | |
| 2622 | bfd_put_32 (output_bfd, |
| 2623 | (bfd_vma) insert_thumb_branch (tmp, ret_offset), |
| 2624 | hit_data - input_section->vma); |
| 2625 | |
| 2626 | return TRUE; |
| 2627 | } |
| 2628 | |
| 2629 | /* Arm code calling a Thumb function. */ |
| 2630 | |
| 2631 | static int |
| 2632 | elf32_arm_to_thumb_stub (struct bfd_link_info * info, |
| 2633 | const char * name, |
| 2634 | bfd * input_bfd, |
| 2635 | bfd * output_bfd, |
| 2636 | asection * input_section, |
| 2637 | bfd_byte * hit_data, |
| 2638 | asection * sym_sec, |
| 2639 | bfd_vma offset, |
| 2640 | bfd_signed_vma addend, |
| 2641 | bfd_vma val) |
| 2642 | { |
| 2643 | unsigned long int tmp; |
| 2644 | bfd_vma my_offset; |
| 2645 | asection * s; |
| 2646 | long int ret_offset; |
| 2647 | struct elf_link_hash_entry * myh; |
| 2648 | struct elf32_arm_link_hash_table * globals; |
| 2649 | |
| 2650 | myh = find_arm_glue (info, name, input_bfd); |
| 2651 | if (myh == NULL) |
| 2652 | return FALSE; |
| 2653 | |
| 2654 | globals = elf32_arm_hash_table (info); |
| 2655 | |
| 2656 | BFD_ASSERT (globals != NULL); |
| 2657 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 2658 | |
| 2659 | my_offset = myh->root.u.def.value; |
| 2660 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, |
| 2661 | ARM2THUMB_GLUE_SECTION_NAME); |
| 2662 | BFD_ASSERT (s != NULL); |
| 2663 | BFD_ASSERT (s->contents != NULL); |
| 2664 | BFD_ASSERT (s->output_section != NULL); |
| 2665 | |
| 2666 | if ((my_offset & 0x01) == 0x01) |
| 2667 | { |
| 2668 | if (sym_sec != NULL |
| 2669 | && sym_sec->owner != NULL |
| 2670 | && !INTERWORK_FLAG (sym_sec->owner)) |
| 2671 | { |
| 2672 | (*_bfd_error_handler) |
| 2673 | (_("%B(%s): warning: interworking not enabled.\n" |
| 2674 | " first occurrence: %B: arm call to thumb"), |
| 2675 | sym_sec->owner, input_bfd, name); |
| 2676 | } |
| 2677 | |
| 2678 | --my_offset; |
| 2679 | myh->root.u.def.value = my_offset; |
| 2680 | |
| 2681 | if ((info->shared || globals->root.is_relocatable_executable)) |
| 2682 | { |
| 2683 | /* For relocatable objects we can't use absolute addresses, |
| 2684 | so construct the address from a relative offset. */ |
| 2685 | /* TODO: If the offset is small it's probably worth |
| 2686 | constructing the address with adds. */ |
| 2687 | bfd_put_32 (output_bfd, (bfd_vma) a2t1p_ldr_insn, |
| 2688 | s->contents + my_offset); |
| 2689 | bfd_put_32 (output_bfd, (bfd_vma) a2t2p_add_pc_insn, |
| 2690 | s->contents + my_offset + 4); |
| 2691 | bfd_put_32 (output_bfd, (bfd_vma) a2t3p_bx_r12_insn, |
| 2692 | s->contents + my_offset + 8); |
| 2693 | /* Adjust the offset by 4 for the position of the add, |
| 2694 | and 8 for the pipeline offset. */ |
| 2695 | ret_offset = (val - (s->output_offset |
| 2696 | + s->output_section->vma |
| 2697 | + my_offset + 12)) |
| 2698 | | 1; |
| 2699 | bfd_put_32 (output_bfd, ret_offset, |
| 2700 | s->contents + my_offset + 12); |
| 2701 | } |
| 2702 | else |
| 2703 | { |
| 2704 | bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn, |
| 2705 | s->contents + my_offset); |
| 2706 | |
| 2707 | bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn, |
| 2708 | s->contents + my_offset + 4); |
| 2709 | |
| 2710 | /* It's a thumb address. Add the low order bit. */ |
| 2711 | bfd_put_32 (output_bfd, val | a2t3_func_addr_insn, |
| 2712 | s->contents + my_offset + 8); |
| 2713 | } |
| 2714 | } |
| 2715 | |
| 2716 | BFD_ASSERT (my_offset <= globals->arm_glue_size); |
| 2717 | |
| 2718 | tmp = bfd_get_32 (input_bfd, hit_data); |
| 2719 | tmp = tmp & 0xFF000000; |
| 2720 | |
| 2721 | /* Somehow these are both 4 too far, so subtract 8. */ |
| 2722 | ret_offset = (s->output_offset |
| 2723 | + my_offset |
| 2724 | + s->output_section->vma |
| 2725 | - (input_section->output_offset |
| 2726 | + input_section->output_section->vma |
| 2727 | + offset + addend) |
| 2728 | - 8); |
| 2729 | |
| 2730 | tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF); |
| 2731 | |
| 2732 | bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma); |
| 2733 | |
| 2734 | return TRUE; |
| 2735 | } |
| 2736 | |
| 2737 | /* Some relocations map to different relocations depending on the |
| 2738 | target. Return the real relocation. */ |
| 2739 | static int |
| 2740 | arm_real_reloc_type (struct elf32_arm_link_hash_table * globals, |
| 2741 | int r_type) |
| 2742 | { |
| 2743 | switch (r_type) |
| 2744 | { |
| 2745 | case R_ARM_TARGET1: |
| 2746 | if (globals->target1_is_rel) |
| 2747 | return R_ARM_REL32; |
| 2748 | else |
| 2749 | return R_ARM_ABS32; |
| 2750 | |
| 2751 | case R_ARM_TARGET2: |
| 2752 | return globals->target2_reloc; |
| 2753 | |
| 2754 | default: |
| 2755 | return r_type; |
| 2756 | } |
| 2757 | } |
| 2758 | |
| 2759 | /* Return the base VMA address which should be subtracted from real addresses |
| 2760 | when resolving @dtpoff relocation. |
| 2761 | This is PT_TLS segment p_vaddr. */ |
| 2762 | |
| 2763 | static bfd_vma |
| 2764 | dtpoff_base (struct bfd_link_info *info) |
| 2765 | { |
| 2766 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 2767 | if (elf_hash_table (info)->tls_sec == NULL) |
| 2768 | return 0; |
| 2769 | return elf_hash_table (info)->tls_sec->vma; |
| 2770 | } |
| 2771 | |
| 2772 | /* Return the relocation value for @tpoff relocation |
| 2773 | if STT_TLS virtual address is ADDRESS. */ |
| 2774 | |
| 2775 | static bfd_vma |
| 2776 | tpoff (struct bfd_link_info *info, bfd_vma address) |
| 2777 | { |
| 2778 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 2779 | bfd_vma base; |
| 2780 | |
| 2781 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 2782 | if (htab->tls_sec == NULL) |
| 2783 | return 0; |
| 2784 | base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power); |
| 2785 | return address - htab->tls_sec->vma + base; |
| 2786 | } |
| 2787 | |
| 2788 | /* Perform a relocation as part of a final link. */ |
| 2789 | |
| 2790 | static bfd_reloc_status_type |
| 2791 | elf32_arm_final_link_relocate (reloc_howto_type * howto, |
| 2792 | bfd * input_bfd, |
| 2793 | bfd * output_bfd, |
| 2794 | asection * input_section, |
| 2795 | bfd_byte * contents, |
| 2796 | Elf_Internal_Rela * rel, |
| 2797 | bfd_vma value, |
| 2798 | struct bfd_link_info * info, |
| 2799 | asection * sym_sec, |
| 2800 | const char * sym_name, |
| 2801 | int sym_flags, |
| 2802 | struct elf_link_hash_entry * h, |
| 2803 | bfd_boolean * unresolved_reloc_p) |
| 2804 | { |
| 2805 | unsigned long r_type = howto->type; |
| 2806 | unsigned long r_symndx; |
| 2807 | bfd_byte * hit_data = contents + rel->r_offset; |
| 2808 | bfd * dynobj = NULL; |
| 2809 | Elf_Internal_Shdr * symtab_hdr; |
| 2810 | struct elf_link_hash_entry ** sym_hashes; |
| 2811 | bfd_vma * local_got_offsets; |
| 2812 | asection * sgot = NULL; |
| 2813 | asection * splt = NULL; |
| 2814 | asection * sreloc = NULL; |
| 2815 | bfd_vma addend; |
| 2816 | bfd_signed_vma signed_addend; |
| 2817 | struct elf32_arm_link_hash_table * globals; |
| 2818 | |
| 2819 | globals = elf32_arm_hash_table (info); |
| 2820 | |
| 2821 | /* Some relocation type map to different relocations depending on the |
| 2822 | target. We pick the right one here. */ |
| 2823 | r_type = arm_real_reloc_type (globals, r_type); |
| 2824 | if (r_type != howto->type) |
| 2825 | howto = elf32_arm_howto_from_type (r_type); |
| 2826 | |
| 2827 | /* If the start address has been set, then set the EF_ARM_HASENTRY |
| 2828 | flag. Setting this more than once is redundant, but the cost is |
| 2829 | not too high, and it keeps the code simple. |
| 2830 | |
| 2831 | The test is done here, rather than somewhere else, because the |
| 2832 | start address is only set just before the final link commences. |
| 2833 | |
| 2834 | Note - if the user deliberately sets a start address of 0, the |
| 2835 | flag will not be set. */ |
| 2836 | if (bfd_get_start_address (output_bfd) != 0) |
| 2837 | elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY; |
| 2838 | |
| 2839 | dynobj = elf_hash_table (info)->dynobj; |
| 2840 | if (dynobj) |
| 2841 | { |
| 2842 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 2843 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 2844 | } |
| 2845 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
| 2846 | sym_hashes = elf_sym_hashes (input_bfd); |
| 2847 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 2848 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2849 | |
| 2850 | if (globals->use_rel) |
| 2851 | { |
| 2852 | addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask; |
| 2853 | |
| 2854 | if (addend & ((howto->src_mask + 1) >> 1)) |
| 2855 | { |
| 2856 | signed_addend = -1; |
| 2857 | signed_addend &= ~ howto->src_mask; |
| 2858 | signed_addend |= addend; |
| 2859 | } |
| 2860 | else |
| 2861 | signed_addend = addend; |
| 2862 | } |
| 2863 | else |
| 2864 | addend = signed_addend = rel->r_addend; |
| 2865 | |
| 2866 | switch (r_type) |
| 2867 | { |
| 2868 | case R_ARM_NONE: |
| 2869 | /* We don't need to find a value for this symbol. It's just a |
| 2870 | marker. */ |
| 2871 | *unresolved_reloc_p = FALSE; |
| 2872 | return bfd_reloc_ok; |
| 2873 | |
| 2874 | case R_ARM_PC24: |
| 2875 | case R_ARM_ABS32: |
| 2876 | case R_ARM_REL32: |
| 2877 | case R_ARM_CALL: |
| 2878 | case R_ARM_JUMP24: |
| 2879 | case R_ARM_XPC25: |
| 2880 | case R_ARM_PREL31: |
| 2881 | case R_ARM_PLT32: |
| 2882 | /* r_symndx will be zero only for relocs against symbols |
| 2883 | from removed linkonce sections, or sections discarded by |
| 2884 | a linker script. */ |
| 2885 | if (r_symndx == 0) |
| 2886 | return bfd_reloc_ok; |
| 2887 | |
| 2888 | /* Handle relocations which should use the PLT entry. ABS32/REL32 |
| 2889 | will use the symbol's value, which may point to a PLT entry, but we |
| 2890 | don't need to handle that here. If we created a PLT entry, all |
| 2891 | branches in this object should go to it. */ |
| 2892 | if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32) |
| 2893 | && h != NULL |
| 2894 | && splt != NULL |
| 2895 | && h->plt.offset != (bfd_vma) -1) |
| 2896 | { |
| 2897 | /* If we've created a .plt section, and assigned a PLT entry to |
| 2898 | this function, it should not be known to bind locally. If |
| 2899 | it were, we would have cleared the PLT entry. */ |
| 2900 | BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h)); |
| 2901 | |
| 2902 | value = (splt->output_section->vma |
| 2903 | + splt->output_offset |
| 2904 | + h->plt.offset); |
| 2905 | *unresolved_reloc_p = FALSE; |
| 2906 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 2907 | contents, rel->r_offset, value, |
| 2908 | (bfd_vma) 0); |
| 2909 | } |
| 2910 | |
| 2911 | /* When generating a shared object or relocatable executable, these |
| 2912 | relocations are copied into the output file to be resolved at |
| 2913 | run time. */ |
| 2914 | if ((info->shared || globals->root.is_relocatable_executable) |
| 2915 | && (input_section->flags & SEC_ALLOC) |
| 2916 | && (r_type != R_ARM_REL32 |
| 2917 | || !SYMBOL_CALLS_LOCAL (info, h)) |
| 2918 | && (h == NULL |
| 2919 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 2920 | || h->root.type != bfd_link_hash_undefweak) |
| 2921 | && r_type != R_ARM_PC24 |
| 2922 | && r_type != R_ARM_CALL |
| 2923 | && r_type != R_ARM_JUMP24 |
| 2924 | && r_type != R_ARM_PREL31 |
| 2925 | && r_type != R_ARM_PLT32) |
| 2926 | { |
| 2927 | Elf_Internal_Rela outrel; |
| 2928 | bfd_byte *loc; |
| 2929 | bfd_boolean skip, relocate; |
| 2930 | |
| 2931 | *unresolved_reloc_p = FALSE; |
| 2932 | |
| 2933 | if (sreloc == NULL) |
| 2934 | { |
| 2935 | const char * name; |
| 2936 | |
| 2937 | name = (bfd_elf_string_from_elf_section |
| 2938 | (input_bfd, |
| 2939 | elf_elfheader (input_bfd)->e_shstrndx, |
| 2940 | elf_section_data (input_section)->rel_hdr.sh_name)); |
| 2941 | if (name == NULL) |
| 2942 | return bfd_reloc_notsupported; |
| 2943 | |
| 2944 | BFD_ASSERT (strncmp (name, ".rel", 4) == 0 |
| 2945 | && strcmp (bfd_get_section_name (input_bfd, |
| 2946 | input_section), |
| 2947 | name + 4) == 0); |
| 2948 | |
| 2949 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 2950 | BFD_ASSERT (sreloc != NULL); |
| 2951 | } |
| 2952 | |
| 2953 | skip = FALSE; |
| 2954 | relocate = FALSE; |
| 2955 | |
| 2956 | outrel.r_offset = |
| 2957 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 2958 | rel->r_offset); |
| 2959 | if (outrel.r_offset == (bfd_vma) -1) |
| 2960 | skip = TRUE; |
| 2961 | else if (outrel.r_offset == (bfd_vma) -2) |
| 2962 | skip = TRUE, relocate = TRUE; |
| 2963 | outrel.r_offset += (input_section->output_section->vma |
| 2964 | + input_section->output_offset); |
| 2965 | |
| 2966 | if (skip) |
| 2967 | memset (&outrel, 0, sizeof outrel); |
| 2968 | else if (h != NULL |
| 2969 | && h->dynindx != -1 |
| 2970 | && (!info->shared |
| 2971 | || !info->symbolic |
| 2972 | || !h->def_regular)) |
| 2973 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 2974 | else |
| 2975 | { |
| 2976 | int symbol; |
| 2977 | |
| 2978 | /* This symbol is local, or marked to become local. */ |
| 2979 | relocate = TRUE; |
| 2980 | if (sym_flags == STT_ARM_TFUNC) |
| 2981 | value |= 1; |
| 2982 | if (globals->symbian_p) |
| 2983 | { |
| 2984 | /* On Symbian OS, the data segment and text segement |
| 2985 | can be relocated independently. Therefore, we |
| 2986 | must indicate the segment to which this |
| 2987 | relocation is relative. The BPABI allows us to |
| 2988 | use any symbol in the right segment; we just use |
| 2989 | the section symbol as it is convenient. (We |
| 2990 | cannot use the symbol given by "h" directly as it |
| 2991 | will not appear in the dynamic symbol table.) */ |
| 2992 | if (sym_sec) |
| 2993 | symbol = elf_section_data (sym_sec->output_section)->dynindx; |
| 2994 | else |
| 2995 | symbol = elf_section_data (input_section->output_section)->dynindx; |
| 2996 | BFD_ASSERT (symbol != 0); |
| 2997 | } |
| 2998 | else |
| 2999 | /* On SVR4-ish systems, the dynamic loader cannot |
| 3000 | relocate the text and data segments independently, |
| 3001 | so the symbol does not matter. */ |
| 3002 | symbol = 0; |
| 3003 | outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE); |
| 3004 | } |
| 3005 | |
| 3006 | loc = sreloc->contents; |
| 3007 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel); |
| 3008 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
| 3009 | |
| 3010 | /* If this reloc is against an external symbol, we do not want to |
| 3011 | fiddle with the addend. Otherwise, we need to include the symbol |
| 3012 | value so that it becomes an addend for the dynamic reloc. */ |
| 3013 | if (! relocate) |
| 3014 | return bfd_reloc_ok; |
| 3015 | |
| 3016 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3017 | contents, rel->r_offset, value, |
| 3018 | (bfd_vma) 0); |
| 3019 | } |
| 3020 | else switch (r_type) |
| 3021 | { |
| 3022 | case R_ARM_XPC25: /* Arm BLX instruction. */ |
| 3023 | case R_ARM_CALL: |
| 3024 | case R_ARM_JUMP24: |
| 3025 | case R_ARM_PC24: /* Arm B/BL instruction */ |
| 3026 | case R_ARM_PLT32: |
| 3027 | if (r_type == R_ARM_XPC25) |
| 3028 | { |
| 3029 | /* Check for Arm calling Arm function. */ |
| 3030 | /* FIXME: Should we translate the instruction into a BL |
| 3031 | instruction instead ? */ |
| 3032 | if (sym_flags != STT_ARM_TFUNC) |
| 3033 | (*_bfd_error_handler) |
| 3034 | (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."), |
| 3035 | input_bfd, |
| 3036 | h ? h->root.root.string : "(local)"); |
| 3037 | } |
| 3038 | else |
| 3039 | { |
| 3040 | /* Check for Arm calling Thumb function. */ |
| 3041 | if (sym_flags == STT_ARM_TFUNC) |
| 3042 | { |
| 3043 | elf32_arm_to_thumb_stub (info, sym_name, input_bfd, |
| 3044 | output_bfd, input_section, |
| 3045 | hit_data, sym_sec, rel->r_offset, |
| 3046 | signed_addend, value); |
| 3047 | return bfd_reloc_ok; |
| 3048 | } |
| 3049 | } |
| 3050 | |
| 3051 | /* The ARM ELF ABI says that this reloc is computed as: S - P + A |
| 3052 | where: |
| 3053 | S is the address of the symbol in the relocation. |
| 3054 | P is address of the instruction being relocated. |
| 3055 | A is the addend (extracted from the instruction) in bytes. |
| 3056 | |
| 3057 | S is held in 'value'. |
| 3058 | P is the base address of the section containing the |
| 3059 | instruction plus the offset of the reloc into that |
| 3060 | section, ie: |
| 3061 | (input_section->output_section->vma + |
| 3062 | input_section->output_offset + |
| 3063 | rel->r_offset). |
| 3064 | A is the addend, converted into bytes, ie: |
| 3065 | (signed_addend * 4) |
| 3066 | |
| 3067 | Note: None of these operations have knowledge of the pipeline |
| 3068 | size of the processor, thus it is up to the assembler to |
| 3069 | encode this information into the addend. */ |
| 3070 | value -= (input_section->output_section->vma |
| 3071 | + input_section->output_offset); |
| 3072 | value -= rel->r_offset; |
| 3073 | if (globals->use_rel) |
| 3074 | value += (signed_addend << howto->size); |
| 3075 | else |
| 3076 | /* RELA addends do not have to be adjusted by howto->size. */ |
| 3077 | value += signed_addend; |
| 3078 | |
| 3079 | signed_addend = value; |
| 3080 | signed_addend >>= howto->rightshift; |
| 3081 | |
| 3082 | /* It is not an error for an undefined weak reference to be |
| 3083 | out of range. Any program that branches to such a symbol |
| 3084 | is going to crash anyway, so there is no point worrying |
| 3085 | about getting the destination exactly right. */ |
| 3086 | if (! h || h->root.type != bfd_link_hash_undefweak) |
| 3087 | { |
| 3088 | /* Perform a signed range check. */ |
| 3089 | if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1)) |
| 3090 | || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1))) |
| 3091 | return bfd_reloc_overflow; |
| 3092 | } |
| 3093 | |
| 3094 | /* If necessary set the H bit in the BLX instruction. */ |
| 3095 | if (r_type == R_ARM_XPC25 && ((value & 2) == 2)) |
| 3096 | value = (signed_addend & howto->dst_mask) |
| 3097 | | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)) |
| 3098 | | (1 << 24); |
| 3099 | else |
| 3100 | value = (signed_addend & howto->dst_mask) |
| 3101 | | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)); |
| 3102 | break; |
| 3103 | |
| 3104 | case R_ARM_ABS32: |
| 3105 | value += addend; |
| 3106 | if (sym_flags == STT_ARM_TFUNC) |
| 3107 | value |= 1; |
| 3108 | break; |
| 3109 | |
| 3110 | case R_ARM_REL32: |
| 3111 | value -= (input_section->output_section->vma |
| 3112 | + input_section->output_offset + rel->r_offset); |
| 3113 | value += addend; |
| 3114 | break; |
| 3115 | |
| 3116 | case R_ARM_PREL31: |
| 3117 | value -= (input_section->output_section->vma |
| 3118 | + input_section->output_offset + rel->r_offset); |
| 3119 | value += signed_addend; |
| 3120 | if (! h || h->root.type != bfd_link_hash_undefweak) |
| 3121 | { |
| 3122 | /* Check for overflow */ |
| 3123 | if ((value ^ (value >> 1)) & (1 << 30)) |
| 3124 | return bfd_reloc_overflow; |
| 3125 | } |
| 3126 | value &= 0x7fffffff; |
| 3127 | value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000); |
| 3128 | if (sym_flags == STT_ARM_TFUNC) |
| 3129 | value |= 1; |
| 3130 | break; |
| 3131 | } |
| 3132 | |
| 3133 | bfd_put_32 (input_bfd, value, hit_data); |
| 3134 | return bfd_reloc_ok; |
| 3135 | |
| 3136 | case R_ARM_ABS8: |
| 3137 | value += addend; |
| 3138 | if ((long) value > 0x7f || (long) value < -0x80) |
| 3139 | return bfd_reloc_overflow; |
| 3140 | |
| 3141 | bfd_put_8 (input_bfd, value, hit_data); |
| 3142 | return bfd_reloc_ok; |
| 3143 | |
| 3144 | case R_ARM_ABS16: |
| 3145 | value += addend; |
| 3146 | |
| 3147 | if ((long) value > 0x7fff || (long) value < -0x8000) |
| 3148 | return bfd_reloc_overflow; |
| 3149 | |
| 3150 | bfd_put_16 (input_bfd, value, hit_data); |
| 3151 | return bfd_reloc_ok; |
| 3152 | |
| 3153 | case R_ARM_ABS12: |
| 3154 | /* Support ldr and str instruction for the arm */ |
| 3155 | /* Also thumb b (unconditional branch). ??? Really? */ |
| 3156 | value += addend; |
| 3157 | |
| 3158 | if ((long) value > 0x7ff || (long) value < -0x800) |
| 3159 | return bfd_reloc_overflow; |
| 3160 | |
| 3161 | value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000); |
| 3162 | bfd_put_32 (input_bfd, value, hit_data); |
| 3163 | return bfd_reloc_ok; |
| 3164 | |
| 3165 | case R_ARM_THM_ABS5: |
| 3166 | /* Support ldr and str instructions for the thumb. */ |
| 3167 | if (globals->use_rel) |
| 3168 | { |
| 3169 | /* Need to refetch addend. */ |
| 3170 | addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; |
| 3171 | /* ??? Need to determine shift amount from operand size. */ |
| 3172 | addend >>= howto->rightshift; |
| 3173 | } |
| 3174 | value += addend; |
| 3175 | |
| 3176 | /* ??? Isn't value unsigned? */ |
| 3177 | if ((long) value > 0x1f || (long) value < -0x10) |
| 3178 | return bfd_reloc_overflow; |
| 3179 | |
| 3180 | /* ??? Value needs to be properly shifted into place first. */ |
| 3181 | value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f; |
| 3182 | bfd_put_16 (input_bfd, value, hit_data); |
| 3183 | return bfd_reloc_ok; |
| 3184 | |
| 3185 | case R_ARM_THM_XPC22: |
| 3186 | case R_ARM_THM_CALL: |
| 3187 | /* Thumb BL (branch long instruction). */ |
| 3188 | { |
| 3189 | bfd_vma relocation; |
| 3190 | bfd_boolean overflow = FALSE; |
| 3191 | bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data); |
| 3192 | bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2); |
| 3193 | bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift; |
| 3194 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; |
| 3195 | bfd_vma check; |
| 3196 | bfd_signed_vma signed_check; |
| 3197 | bfd_boolean thumb_plt_call = FALSE; |
| 3198 | |
| 3199 | /* Need to refetch the addend and squish the two 11 bit pieces |
| 3200 | together. */ |
| 3201 | if (globals->use_rel) |
| 3202 | { |
| 3203 | bfd_vma upper = upper_insn & 0x7ff; |
| 3204 | bfd_vma lower = lower_insn & 0x7ff; |
| 3205 | upper = (upper ^ 0x400) - 0x400; /* Sign extend. */ |
| 3206 | addend = (upper << 12) | (lower << 1); |
| 3207 | signed_addend = addend; |
| 3208 | } |
| 3209 | |
| 3210 | if (r_type == R_ARM_THM_XPC22) |
| 3211 | { |
| 3212 | /* Check for Thumb to Thumb call. */ |
| 3213 | /* FIXME: Should we translate the instruction into a BL |
| 3214 | instruction instead ? */ |
| 3215 | if (sym_flags == STT_ARM_TFUNC) |
| 3216 | (*_bfd_error_handler) |
| 3217 | (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."), |
| 3218 | input_bfd, |
| 3219 | h ? h->root.root.string : "(local)"); |
| 3220 | } |
| 3221 | else |
| 3222 | { |
| 3223 | /* If it is not a call to Thumb, assume call to Arm. |
| 3224 | If it is a call relative to a section name, then it is not a |
| 3225 | function call at all, but rather a long jump. Calls through |
| 3226 | the PLT do not require stubs. */ |
| 3227 | if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION |
| 3228 | && (h == NULL || splt == NULL |
| 3229 | || h->plt.offset == (bfd_vma) -1)) |
| 3230 | { |
| 3231 | if (elf32_thumb_to_arm_stub |
| 3232 | (info, sym_name, input_bfd, output_bfd, input_section, |
| 3233 | hit_data, sym_sec, rel->r_offset, signed_addend, value)) |
| 3234 | return bfd_reloc_ok; |
| 3235 | else |
| 3236 | return bfd_reloc_dangerous; |
| 3237 | } |
| 3238 | } |
| 3239 | |
| 3240 | /* Handle calls via the PLT. */ |
| 3241 | if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1) |
| 3242 | { |
| 3243 | value = (splt->output_section->vma |
| 3244 | + splt->output_offset |
| 3245 | + h->plt.offset); |
| 3246 | if (globals->use_blx) |
| 3247 | { |
| 3248 | /* If the Thumb BLX instruction is available, convert the |
| 3249 | BL to a BLX instruction to call the ARM-mode PLT entry. */ |
| 3250 | if ((lower_insn & (0x3 << 11)) == 0x3 << 11) |
| 3251 | { |
| 3252 | lower_insn = (lower_insn & ~(0x3 << 11)) | 0x1 << 11; |
| 3253 | thumb_plt_call = TRUE; |
| 3254 | } |
| 3255 | } |
| 3256 | else |
| 3257 | /* Target the Thumb stub before the ARM PLT entry. */ |
| 3258 | value -= PLT_THUMB_STUB_SIZE; |
| 3259 | *unresolved_reloc_p = FALSE; |
| 3260 | } |
| 3261 | |
| 3262 | relocation = value + signed_addend; |
| 3263 | |
| 3264 | relocation -= (input_section->output_section->vma |
| 3265 | + input_section->output_offset |
| 3266 | + rel->r_offset); |
| 3267 | |
| 3268 | check = relocation >> howto->rightshift; |
| 3269 | |
| 3270 | /* If this is a signed value, the rightshift just dropped |
| 3271 | leading 1 bits (assuming twos complement). */ |
| 3272 | if ((bfd_signed_vma) relocation >= 0) |
| 3273 | signed_check = check; |
| 3274 | else |
| 3275 | signed_check = check | ~((bfd_vma) -1 >> howto->rightshift); |
| 3276 | |
| 3277 | /* Assumes two's complement. */ |
| 3278 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) |
| 3279 | overflow = TRUE; |
| 3280 | |
| 3281 | if ((r_type == R_ARM_THM_XPC22 |
| 3282 | && ((lower_insn & 0x1800) == 0x0800)) |
| 3283 | || thumb_plt_call) |
| 3284 | /* For a BLX instruction, make sure that the relocation is rounded up |
| 3285 | to a word boundary. This follows the semantics of the instruction |
| 3286 | which specifies that bit 1 of the target address will come from bit |
| 3287 | 1 of the base address. */ |
| 3288 | relocation = (relocation + 2) & ~ 3; |
| 3289 | |
| 3290 | /* Put RELOCATION back into the insn. */ |
| 3291 | upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff); |
| 3292 | lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff); |
| 3293 | |
| 3294 | /* Put the relocated value back in the object file: */ |
| 3295 | bfd_put_16 (input_bfd, upper_insn, hit_data); |
| 3296 | bfd_put_16 (input_bfd, lower_insn, hit_data + 2); |
| 3297 | |
| 3298 | return (overflow ? bfd_reloc_overflow : bfd_reloc_ok); |
| 3299 | } |
| 3300 | break; |
| 3301 | |
| 3302 | case R_ARM_THM_JUMP24: |
| 3303 | /* Thumb32 unconditional branch instruction. */ |
| 3304 | { |
| 3305 | bfd_vma relocation; |
| 3306 | bfd_boolean overflow = FALSE; |
| 3307 | bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data); |
| 3308 | bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2); |
| 3309 | bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift; |
| 3310 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; |
| 3311 | bfd_vma check; |
| 3312 | bfd_signed_vma signed_check; |
| 3313 | |
| 3314 | /* Need to refetch the addend, reconstruct the top three bits, and glue the |
| 3315 | two pieces together. */ |
| 3316 | if (globals->use_rel) |
| 3317 | { |
| 3318 | bfd_vma S = (upper_insn & 0x0400) >> 10; |
| 3319 | bfd_vma hi = (upper_insn & 0x03ff); |
| 3320 | bfd_vma I1 = (lower_insn & 0x2000) >> 13; |
| 3321 | bfd_vma I2 = (lower_insn & 0x0800) >> 11; |
| 3322 | bfd_vma lo = (lower_insn & 0x07ff); |
| 3323 | |
| 3324 | I1 = !(I1 ^ S); |
| 3325 | I2 = !(I2 ^ S); |
| 3326 | S = !S; |
| 3327 | |
| 3328 | signed_addend = (S << 24) | (I1 << 23) | (I2 << 22) | (hi << 12) | (lo << 1); |
| 3329 | signed_addend -= (1 << 24); /* Sign extend. */ |
| 3330 | } |
| 3331 | |
| 3332 | /* ??? Should handle interworking? GCC might someday try to |
| 3333 | use this for tail calls. */ |
| 3334 | |
| 3335 | relocation = value + signed_addend; |
| 3336 | relocation -= (input_section->output_section->vma |
| 3337 | + input_section->output_offset |
| 3338 | + rel->r_offset); |
| 3339 | |
| 3340 | check = relocation >> howto->rightshift; |
| 3341 | |
| 3342 | /* If this is a signed value, the rightshift just dropped |
| 3343 | leading 1 bits (assuming twos complement). */ |
| 3344 | if ((bfd_signed_vma) relocation >= 0) |
| 3345 | signed_check = check; |
| 3346 | else |
| 3347 | signed_check = check | ~((bfd_vma) -1 >> howto->rightshift); |
| 3348 | |
| 3349 | /* Assumes two's complement. */ |
| 3350 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) |
| 3351 | overflow = TRUE; |
| 3352 | |
| 3353 | /* Put RELOCATION back into the insn. */ |
| 3354 | { |
| 3355 | bfd_vma S = (relocation & 0x01000000) >> 24; |
| 3356 | bfd_vma I1 = (relocation & 0x00800000) >> 23; |
| 3357 | bfd_vma I2 = (relocation & 0x00400000) >> 22; |
| 3358 | bfd_vma hi = (relocation & 0x003ff000) >> 12; |
| 3359 | bfd_vma lo = (relocation & 0x00000ffe) >> 1; |
| 3360 | |
| 3361 | I1 = !(I1 ^ S); |
| 3362 | I2 = !(I2 ^ S); |
| 3363 | |
| 3364 | upper_insn = (upper_insn & (bfd_vma) 0xf800) | (S << 10) | hi; |
| 3365 | lower_insn = (lower_insn & (bfd_vma) 0xd000) | (I1 << 13) | (I2 << 11) | lo; |
| 3366 | } |
| 3367 | |
| 3368 | /* Put the relocated value back in the object file: */ |
| 3369 | bfd_put_16 (input_bfd, upper_insn, hit_data); |
| 3370 | bfd_put_16 (input_bfd, lower_insn, hit_data + 2); |
| 3371 | |
| 3372 | return (overflow ? bfd_reloc_overflow : bfd_reloc_ok); |
| 3373 | } |
| 3374 | |
| 3375 | case R_ARM_THM_JUMP19: |
| 3376 | /* Thumb32 conditional branch instruction. */ |
| 3377 | { |
| 3378 | bfd_vma relocation; |
| 3379 | bfd_boolean overflow = FALSE; |
| 3380 | bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data); |
| 3381 | bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2); |
| 3382 | bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift; |
| 3383 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; |
| 3384 | bfd_vma check; |
| 3385 | bfd_signed_vma signed_check; |
| 3386 | |
| 3387 | /* Need to refetch the addend, reconstruct the top three bits, |
| 3388 | and squish the two 11 bit pieces together. */ |
| 3389 | if (globals->use_rel) |
| 3390 | { |
| 3391 | bfd_vma S = (upper_insn & 0x0400) >> 10; |
| 3392 | bfd_vma upper = (upper_insn & 0x001f); |
| 3393 | bfd_vma J1 = (lower_insn & 0x2000) >> 13; |
| 3394 | bfd_vma J2 = (lower_insn & 0x0800) >> 11; |
| 3395 | bfd_vma lower = (lower_insn & 0x07ff); |
| 3396 | |
| 3397 | upper |= J2 << 6; |
| 3398 | upper |= J1 << 7; |
| 3399 | upper |= ~S << 8; |
| 3400 | upper -= 0x0100; /* Sign extend. */ |
| 3401 | |
| 3402 | addend = (upper << 12) | (lower << 1); |
| 3403 | signed_addend = addend; |
| 3404 | } |
| 3405 | |
| 3406 | /* ??? Should handle interworking? GCC might someday try to |
| 3407 | use this for tail calls. */ |
| 3408 | |
| 3409 | relocation = value + signed_addend; |
| 3410 | relocation -= (input_section->output_section->vma |
| 3411 | + input_section->output_offset |
| 3412 | + rel->r_offset); |
| 3413 | |
| 3414 | check = relocation >> howto->rightshift; |
| 3415 | |
| 3416 | /* If this is a signed value, the rightshift just dropped |
| 3417 | leading 1 bits (assuming twos complement). */ |
| 3418 | if ((bfd_signed_vma) relocation >= 0) |
| 3419 | signed_check = check; |
| 3420 | else |
| 3421 | signed_check = check | ~((bfd_vma) -1 >> howto->rightshift); |
| 3422 | |
| 3423 | /* Assumes two's complement. */ |
| 3424 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) |
| 3425 | overflow = TRUE; |
| 3426 | |
| 3427 | /* Put RELOCATION back into the insn. */ |
| 3428 | { |
| 3429 | bfd_vma S = (relocation & 0x00100000) >> 20; |
| 3430 | bfd_vma J2 = (relocation & 0x00080000) >> 19; |
| 3431 | bfd_vma J1 = (relocation & 0x00040000) >> 18; |
| 3432 | bfd_vma hi = (relocation & 0x0003f000) >> 12; |
| 3433 | bfd_vma lo = (relocation & 0x00000ffe) >> 1; |
| 3434 | |
| 3435 | upper_insn = (upper_insn & 0xfb30) | (S << 10) | hi; |
| 3436 | lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo; |
| 3437 | } |
| 3438 | |
| 3439 | /* Put the relocated value back in the object file: */ |
| 3440 | bfd_put_16 (input_bfd, upper_insn, hit_data); |
| 3441 | bfd_put_16 (input_bfd, lower_insn, hit_data + 2); |
| 3442 | |
| 3443 | return (overflow ? bfd_reloc_overflow : bfd_reloc_ok); |
| 3444 | } |
| 3445 | |
| 3446 | case R_ARM_THM_JUMP11: |
| 3447 | case R_ARM_THM_JUMP8: |
| 3448 | case R_ARM_THM_JUMP6: |
| 3449 | /* Thumb B (branch) instruction). */ |
| 3450 | { |
| 3451 | bfd_signed_vma relocation; |
| 3452 | bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1; |
| 3453 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; |
| 3454 | bfd_signed_vma signed_check; |
| 3455 | |
| 3456 | /* CZB cannot jump backward. */ |
| 3457 | if (r_type == R_ARM_THM_JUMP6) |
| 3458 | reloc_signed_min = 0; |
| 3459 | |
| 3460 | if (globals->use_rel) |
| 3461 | { |
| 3462 | /* Need to refetch addend. */ |
| 3463 | addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; |
| 3464 | if (addend & ((howto->src_mask + 1) >> 1)) |
| 3465 | { |
| 3466 | signed_addend = -1; |
| 3467 | signed_addend &= ~ howto->src_mask; |
| 3468 | signed_addend |= addend; |
| 3469 | } |
| 3470 | else |
| 3471 | signed_addend = addend; |
| 3472 | /* The value in the insn has been right shifted. We need to |
| 3473 | undo this, so that we can perform the address calculation |
| 3474 | in terms of bytes. */ |
| 3475 | signed_addend <<= howto->rightshift; |
| 3476 | } |
| 3477 | relocation = value + signed_addend; |
| 3478 | |
| 3479 | relocation -= (input_section->output_section->vma |
| 3480 | + input_section->output_offset |
| 3481 | + rel->r_offset); |
| 3482 | |
| 3483 | relocation >>= howto->rightshift; |
| 3484 | signed_check = relocation; |
| 3485 | |
| 3486 | if (r_type == R_ARM_THM_JUMP6) |
| 3487 | relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3); |
| 3488 | else |
| 3489 | relocation &= howto->dst_mask; |
| 3490 | relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask)); |
| 3491 | |
| 3492 | bfd_put_16 (input_bfd, relocation, hit_data); |
| 3493 | |
| 3494 | /* Assumes two's complement. */ |
| 3495 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) |
| 3496 | return bfd_reloc_overflow; |
| 3497 | |
| 3498 | return bfd_reloc_ok; |
| 3499 | } |
| 3500 | |
| 3501 | case R_ARM_ALU_PCREL7_0: |
| 3502 | case R_ARM_ALU_PCREL15_8: |
| 3503 | case R_ARM_ALU_PCREL23_15: |
| 3504 | { |
| 3505 | bfd_vma insn; |
| 3506 | bfd_vma relocation; |
| 3507 | |
| 3508 | insn = bfd_get_32 (input_bfd, hit_data); |
| 3509 | if (globals->use_rel) |
| 3510 | { |
| 3511 | /* Extract the addend. */ |
| 3512 | addend = (insn & 0xff) << ((insn & 0xf00) >> 7); |
| 3513 | signed_addend = addend; |
| 3514 | } |
| 3515 | relocation = value + signed_addend; |
| 3516 | |
| 3517 | relocation -= (input_section->output_section->vma |
| 3518 | + input_section->output_offset |
| 3519 | + rel->r_offset); |
| 3520 | insn = (insn & ~0xfff) |
| 3521 | | ((howto->bitpos << 7) & 0xf00) |
| 3522 | | ((relocation >> howto->bitpos) & 0xff); |
| 3523 | bfd_put_32 (input_bfd, value, hit_data); |
| 3524 | } |
| 3525 | return bfd_reloc_ok; |
| 3526 | |
| 3527 | case R_ARM_GNU_VTINHERIT: |
| 3528 | case R_ARM_GNU_VTENTRY: |
| 3529 | return bfd_reloc_ok; |
| 3530 | |
| 3531 | case R_ARM_GOTOFF32: |
| 3532 | /* Relocation is relative to the start of the |
| 3533 | global offset table. */ |
| 3534 | |
| 3535 | BFD_ASSERT (sgot != NULL); |
| 3536 | if (sgot == NULL) |
| 3537 | return bfd_reloc_notsupported; |
| 3538 | |
| 3539 | /* If we are addressing a Thumb function, we need to adjust the |
| 3540 | address by one, so that attempts to call the function pointer will |
| 3541 | correctly interpret it as Thumb code. */ |
| 3542 | if (sym_flags == STT_ARM_TFUNC) |
| 3543 | value += 1; |
| 3544 | |
| 3545 | /* Note that sgot->output_offset is not involved in this |
| 3546 | calculation. We always want the start of .got. If we |
| 3547 | define _GLOBAL_OFFSET_TABLE in a different way, as is |
| 3548 | permitted by the ABI, we might have to change this |
| 3549 | calculation. */ |
| 3550 | value -= sgot->output_section->vma; |
| 3551 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3552 | contents, rel->r_offset, value, |
| 3553 | (bfd_vma) 0); |
| 3554 | |
| 3555 | case R_ARM_GOTPC: |
| 3556 | /* Use global offset table as symbol value. */ |
| 3557 | BFD_ASSERT (sgot != NULL); |
| 3558 | |
| 3559 | if (sgot == NULL) |
| 3560 | return bfd_reloc_notsupported; |
| 3561 | |
| 3562 | *unresolved_reloc_p = FALSE; |
| 3563 | value = sgot->output_section->vma; |
| 3564 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3565 | contents, rel->r_offset, value, |
| 3566 | (bfd_vma) 0); |
| 3567 | |
| 3568 | case R_ARM_GOT32: |
| 3569 | case R_ARM_GOT_PREL: |
| 3570 | /* Relocation is to the entry for this symbol in the |
| 3571 | global offset table. */ |
| 3572 | if (sgot == NULL) |
| 3573 | return bfd_reloc_notsupported; |
| 3574 | |
| 3575 | if (h != NULL) |
| 3576 | { |
| 3577 | bfd_vma off; |
| 3578 | bfd_boolean dyn; |
| 3579 | |
| 3580 | off = h->got.offset; |
| 3581 | BFD_ASSERT (off != (bfd_vma) -1); |
| 3582 | dyn = globals->root.dynamic_sections_created; |
| 3583 | |
| 3584 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 3585 | || (info->shared |
| 3586 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 3587 | || (ELF_ST_VISIBILITY (h->other) |
| 3588 | && h->root.type == bfd_link_hash_undefweak)) |
| 3589 | { |
| 3590 | /* This is actually a static link, or it is a -Bsymbolic link |
| 3591 | and the symbol is defined locally. We must initialize this |
| 3592 | entry in the global offset table. Since the offset must |
| 3593 | always be a multiple of 4, we use the least significant bit |
| 3594 | to record whether we have initialized it already. |
| 3595 | |
| 3596 | When doing a dynamic link, we create a .rel.got relocation |
| 3597 | entry to initialize the value. This is done in the |
| 3598 | finish_dynamic_symbol routine. */ |
| 3599 | if ((off & 1) != 0) |
| 3600 | off &= ~1; |
| 3601 | else |
| 3602 | { |
| 3603 | /* If we are addressing a Thumb function, we need to |
| 3604 | adjust the address by one, so that attempts to |
| 3605 | call the function pointer will correctly |
| 3606 | interpret it as Thumb code. */ |
| 3607 | if (sym_flags == STT_ARM_TFUNC) |
| 3608 | value |= 1; |
| 3609 | |
| 3610 | bfd_put_32 (output_bfd, value, sgot->contents + off); |
| 3611 | h->got.offset |= 1; |
| 3612 | } |
| 3613 | } |
| 3614 | else |
| 3615 | *unresolved_reloc_p = FALSE; |
| 3616 | |
| 3617 | value = sgot->output_offset + off; |
| 3618 | } |
| 3619 | else |
| 3620 | { |
| 3621 | bfd_vma off; |
| 3622 | |
| 3623 | BFD_ASSERT (local_got_offsets != NULL && |
| 3624 | local_got_offsets[r_symndx] != (bfd_vma) -1); |
| 3625 | |
| 3626 | off = local_got_offsets[r_symndx]; |
| 3627 | |
| 3628 | /* The offset must always be a multiple of 4. We use the |
| 3629 | least significant bit to record whether we have already |
| 3630 | generated the necessary reloc. */ |
| 3631 | if ((off & 1) != 0) |
| 3632 | off &= ~1; |
| 3633 | else |
| 3634 | { |
| 3635 | /* If we are addressing a Thumb function, we need to |
| 3636 | adjust the address by one, so that attempts to |
| 3637 | call the function pointer will correctly |
| 3638 | interpret it as Thumb code. */ |
| 3639 | if (sym_flags == STT_ARM_TFUNC) |
| 3640 | value |= 1; |
| 3641 | |
| 3642 | bfd_put_32 (output_bfd, value, sgot->contents + off); |
| 3643 | |
| 3644 | if (info->shared) |
| 3645 | { |
| 3646 | asection * srelgot; |
| 3647 | Elf_Internal_Rela outrel; |
| 3648 | bfd_byte *loc; |
| 3649 | |
| 3650 | srelgot = bfd_get_section_by_name (dynobj, ".rel.got"); |
| 3651 | BFD_ASSERT (srelgot != NULL); |
| 3652 | |
| 3653 | outrel.r_offset = (sgot->output_section->vma |
| 3654 | + sgot->output_offset |
| 3655 | + off); |
| 3656 | outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); |
| 3657 | loc = srelgot->contents; |
| 3658 | loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel); |
| 3659 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
| 3660 | } |
| 3661 | |
| 3662 | local_got_offsets[r_symndx] |= 1; |
| 3663 | } |
| 3664 | |
| 3665 | value = sgot->output_offset + off; |
| 3666 | } |
| 3667 | if (r_type != R_ARM_GOT32) |
| 3668 | value += sgot->output_section->vma; |
| 3669 | |
| 3670 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3671 | contents, rel->r_offset, value, |
| 3672 | (bfd_vma) 0); |
| 3673 | |
| 3674 | case R_ARM_TLS_LDO32: |
| 3675 | value = value - dtpoff_base (info); |
| 3676 | |
| 3677 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3678 | contents, rel->r_offset, value, (bfd_vma) 0); |
| 3679 | |
| 3680 | case R_ARM_TLS_LDM32: |
| 3681 | { |
| 3682 | bfd_vma off; |
| 3683 | |
| 3684 | if (globals->sgot == NULL) |
| 3685 | abort (); |
| 3686 | |
| 3687 | off = globals->tls_ldm_got.offset; |
| 3688 | |
| 3689 | if ((off & 1) != 0) |
| 3690 | off &= ~1; |
| 3691 | else |
| 3692 | { |
| 3693 | /* If we don't know the module number, create a relocation |
| 3694 | for it. */ |
| 3695 | if (info->shared) |
| 3696 | { |
| 3697 | Elf_Internal_Rela outrel; |
| 3698 | bfd_byte *loc; |
| 3699 | |
| 3700 | if (globals->srelgot == NULL) |
| 3701 | abort (); |
| 3702 | |
| 3703 | outrel.r_offset = (globals->sgot->output_section->vma |
| 3704 | + globals->sgot->output_offset + off); |
| 3705 | outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32); |
| 3706 | |
| 3707 | bfd_put_32 (output_bfd, 0, globals->sgot->contents + off); |
| 3708 | |
| 3709 | loc = globals->srelgot->contents; |
| 3710 | loc += globals->srelgot->reloc_count++ * sizeof (Elf32_External_Rel); |
| 3711 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
| 3712 | } |
| 3713 | else |
| 3714 | bfd_put_32 (output_bfd, 1, globals->sgot->contents + off); |
| 3715 | |
| 3716 | globals->tls_ldm_got.offset |= 1; |
| 3717 | } |
| 3718 | |
| 3719 | value = globals->sgot->output_section->vma + globals->sgot->output_offset + off |
| 3720 | - (input_section->output_section->vma + input_section->output_offset + rel->r_offset); |
| 3721 | |
| 3722 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3723 | contents, rel->r_offset, value, |
| 3724 | (bfd_vma) 0); |
| 3725 | } |
| 3726 | |
| 3727 | case R_ARM_TLS_GD32: |
| 3728 | case R_ARM_TLS_IE32: |
| 3729 | { |
| 3730 | bfd_vma off; |
| 3731 | int indx; |
| 3732 | char tls_type; |
| 3733 | |
| 3734 | if (globals->sgot == NULL) |
| 3735 | abort (); |
| 3736 | |
| 3737 | indx = 0; |
| 3738 | if (h != NULL) |
| 3739 | { |
| 3740 | bfd_boolean dyn; |
| 3741 | dyn = globals->root.dynamic_sections_created; |
| 3742 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 3743 | && (!info->shared |
| 3744 | || !SYMBOL_REFERENCES_LOCAL (info, h))) |
| 3745 | { |
| 3746 | *unresolved_reloc_p = FALSE; |
| 3747 | indx = h->dynindx; |
| 3748 | } |
| 3749 | off = h->got.offset; |
| 3750 | tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type; |
| 3751 | } |
| 3752 | else |
| 3753 | { |
| 3754 | if (local_got_offsets == NULL) |
| 3755 | abort (); |
| 3756 | off = local_got_offsets[r_symndx]; |
| 3757 | tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx]; |
| 3758 | } |
| 3759 | |
| 3760 | if (tls_type == GOT_UNKNOWN) |
| 3761 | abort (); |
| 3762 | |
| 3763 | if ((off & 1) != 0) |
| 3764 | off &= ~1; |
| 3765 | else |
| 3766 | { |
| 3767 | bfd_boolean need_relocs = FALSE; |
| 3768 | Elf_Internal_Rela outrel; |
| 3769 | bfd_byte *loc = NULL; |
| 3770 | int cur_off = off; |
| 3771 | |
| 3772 | /* The GOT entries have not been initialized yet. Do it |
| 3773 | now, and emit any relocations. If both an IE GOT and a |
| 3774 | GD GOT are necessary, we emit the GD first. */ |
| 3775 | |
| 3776 | if ((info->shared || indx != 0) |
| 3777 | && (h == NULL |
| 3778 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 3779 | || h->root.type != bfd_link_hash_undefweak)) |
| 3780 | { |
| 3781 | need_relocs = TRUE; |
| 3782 | if (globals->srelgot == NULL) |
| 3783 | abort (); |
| 3784 | loc = globals->srelgot->contents; |
| 3785 | loc += globals->srelgot->reloc_count * sizeof (Elf32_External_Rel); |
| 3786 | } |
| 3787 | |
| 3788 | if (tls_type & GOT_TLS_GD) |
| 3789 | { |
| 3790 | if (need_relocs) |
| 3791 | { |
| 3792 | outrel.r_offset = (globals->sgot->output_section->vma |
| 3793 | + globals->sgot->output_offset + cur_off); |
| 3794 | outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32); |
| 3795 | bfd_put_32 (output_bfd, 0, globals->sgot->contents + cur_off); |
| 3796 | |
| 3797 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
| 3798 | globals->srelgot->reloc_count++; |
| 3799 | loc += sizeof (Elf32_External_Rel); |
| 3800 | |
| 3801 | if (indx == 0) |
| 3802 | bfd_put_32 (output_bfd, value - dtpoff_base (info), |
| 3803 | globals->sgot->contents + cur_off + 4); |
| 3804 | else |
| 3805 | { |
| 3806 | bfd_put_32 (output_bfd, 0, |
| 3807 | globals->sgot->contents + cur_off + 4); |
| 3808 | |
| 3809 | outrel.r_info = ELF32_R_INFO (indx, |
| 3810 | R_ARM_TLS_DTPOFF32); |
| 3811 | outrel.r_offset += 4; |
| 3812 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
| 3813 | globals->srelgot->reloc_count++; |
| 3814 | loc += sizeof (Elf32_External_Rel); |
| 3815 | } |
| 3816 | } |
| 3817 | else |
| 3818 | { |
| 3819 | /* If we are not emitting relocations for a |
| 3820 | general dynamic reference, then we must be in a |
| 3821 | static link or an executable link with the |
| 3822 | symbol binding locally. Mark it as belonging |
| 3823 | to module 1, the executable. */ |
| 3824 | bfd_put_32 (output_bfd, 1, |
| 3825 | globals->sgot->contents + cur_off); |
| 3826 | bfd_put_32 (output_bfd, value - dtpoff_base (info), |
| 3827 | globals->sgot->contents + cur_off + 4); |
| 3828 | } |
| 3829 | |
| 3830 | cur_off += 8; |
| 3831 | } |
| 3832 | |
| 3833 | if (tls_type & GOT_TLS_IE) |
| 3834 | { |
| 3835 | if (need_relocs) |
| 3836 | { |
| 3837 | outrel.r_offset = (globals->sgot->output_section->vma |
| 3838 | + globals->sgot->output_offset |
| 3839 | + cur_off); |
| 3840 | outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32); |
| 3841 | |
| 3842 | if (indx == 0) |
| 3843 | bfd_put_32 (output_bfd, value - dtpoff_base (info), |
| 3844 | globals->sgot->contents + cur_off); |
| 3845 | else |
| 3846 | bfd_put_32 (output_bfd, 0, |
| 3847 | globals->sgot->contents + cur_off); |
| 3848 | |
| 3849 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
| 3850 | globals->srelgot->reloc_count++; |
| 3851 | loc += sizeof (Elf32_External_Rel); |
| 3852 | } |
| 3853 | else |
| 3854 | bfd_put_32 (output_bfd, tpoff (info, value), |
| 3855 | globals->sgot->contents + cur_off); |
| 3856 | cur_off += 4; |
| 3857 | } |
| 3858 | |
| 3859 | if (h != NULL) |
| 3860 | h->got.offset |= 1; |
| 3861 | else |
| 3862 | local_got_offsets[r_symndx] |= 1; |
| 3863 | } |
| 3864 | |
| 3865 | if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32) |
| 3866 | off += 8; |
| 3867 | value = globals->sgot->output_section->vma + globals->sgot->output_offset + off |
| 3868 | - (input_section->output_section->vma + input_section->output_offset + rel->r_offset); |
| 3869 | |
| 3870 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3871 | contents, rel->r_offset, value, |
| 3872 | (bfd_vma) 0); |
| 3873 | } |
| 3874 | |
| 3875 | case R_ARM_TLS_LE32: |
| 3876 | if (info->shared) |
| 3877 | { |
| 3878 | (*_bfd_error_handler) |
| 3879 | (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"), |
| 3880 | input_bfd, input_section, |
| 3881 | (long) rel->r_offset, howto->name); |
| 3882 | return FALSE; |
| 3883 | } |
| 3884 | else |
| 3885 | value = tpoff (info, value); |
| 3886 | |
| 3887 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3888 | contents, rel->r_offset, value, (bfd_vma) 0); |
| 3889 | |
| 3890 | case R_ARM_V4BX: |
| 3891 | if (globals->fix_v4bx) |
| 3892 | { |
| 3893 | bfd_vma insn = bfd_get_32 (input_bfd, hit_data); |
| 3894 | |
| 3895 | /* Ensure that we have a BX instruction. */ |
| 3896 | BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10); |
| 3897 | |
| 3898 | /* Preserve Rm (lowest four bits) and the condition code |
| 3899 | (highest four bits). Other bits encode MOV PC,Rm. */ |
| 3900 | insn = (insn & 0xf000000f) | 0x01a0f000; |
| 3901 | |
| 3902 | bfd_put_32 (input_bfd, insn, hit_data); |
| 3903 | } |
| 3904 | return bfd_reloc_ok; |
| 3905 | |
| 3906 | default: |
| 3907 | return bfd_reloc_notsupported; |
| 3908 | } |
| 3909 | } |
| 3910 | |
| 3911 | /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */ |
| 3912 | static void |
| 3913 | arm_add_to_rel (bfd * abfd, |
| 3914 | bfd_byte * address, |
| 3915 | reloc_howto_type * howto, |
| 3916 | bfd_signed_vma increment) |
| 3917 | { |
| 3918 | bfd_signed_vma addend; |
| 3919 | |
| 3920 | if (howto->type == R_ARM_THM_CALL) |
| 3921 | { |
| 3922 | int upper_insn, lower_insn; |
| 3923 | int upper, lower; |
| 3924 | |
| 3925 | upper_insn = bfd_get_16 (abfd, address); |
| 3926 | lower_insn = bfd_get_16 (abfd, address + 2); |
| 3927 | upper = upper_insn & 0x7ff; |
| 3928 | lower = lower_insn & 0x7ff; |
| 3929 | |
| 3930 | addend = (upper << 12) | (lower << 1); |
| 3931 | addend += increment; |
| 3932 | addend >>= 1; |
| 3933 | |
| 3934 | upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff); |
| 3935 | lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff); |
| 3936 | |
| 3937 | bfd_put_16 (abfd, (bfd_vma) upper_insn, address); |
| 3938 | bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2); |
| 3939 | } |
| 3940 | else |
| 3941 | { |
| 3942 | bfd_vma contents; |
| 3943 | |
| 3944 | contents = bfd_get_32 (abfd, address); |
| 3945 | |
| 3946 | /* Get the (signed) value from the instruction. */ |
| 3947 | addend = contents & howto->src_mask; |
| 3948 | if (addend & ((howto->src_mask + 1) >> 1)) |
| 3949 | { |
| 3950 | bfd_signed_vma mask; |
| 3951 | |
| 3952 | mask = -1; |
| 3953 | mask &= ~ howto->src_mask; |
| 3954 | addend |= mask; |
| 3955 | } |
| 3956 | |
| 3957 | /* Add in the increment, (which is a byte value). */ |
| 3958 | switch (howto->type) |
| 3959 | { |
| 3960 | default: |
| 3961 | addend += increment; |
| 3962 | break; |
| 3963 | |
| 3964 | case R_ARM_PC24: |
| 3965 | case R_ARM_PLT32: |
| 3966 | case R_ARM_CALL: |
| 3967 | case R_ARM_JUMP24: |
| 3968 | addend <<= howto->size; |
| 3969 | addend += increment; |
| 3970 | |
| 3971 | /* Should we check for overflow here ? */ |
| 3972 | |
| 3973 | /* Drop any undesired bits. */ |
| 3974 | addend >>= howto->rightshift; |
| 3975 | break; |
| 3976 | } |
| 3977 | |
| 3978 | contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask); |
| 3979 | |
| 3980 | bfd_put_32 (abfd, contents, address); |
| 3981 | } |
| 3982 | } |
| 3983 | |
| 3984 | #define IS_ARM_TLS_RELOC(R_TYPE) \ |
| 3985 | ((R_TYPE) == R_ARM_TLS_GD32 \ |
| 3986 | || (R_TYPE) == R_ARM_TLS_LDO32 \ |
| 3987 | || (R_TYPE) == R_ARM_TLS_LDM32 \ |
| 3988 | || (R_TYPE) == R_ARM_TLS_DTPOFF32 \ |
| 3989 | || (R_TYPE) == R_ARM_TLS_DTPMOD32 \ |
| 3990 | || (R_TYPE) == R_ARM_TLS_TPOFF32 \ |
| 3991 | || (R_TYPE) == R_ARM_TLS_LE32 \ |
| 3992 | || (R_TYPE) == R_ARM_TLS_IE32) |
| 3993 | |
| 3994 | /* Relocate an ARM ELF section. */ |
| 3995 | static bfd_boolean |
| 3996 | elf32_arm_relocate_section (bfd * output_bfd, |
| 3997 | struct bfd_link_info * info, |
| 3998 | bfd * input_bfd, |
| 3999 | asection * input_section, |
| 4000 | bfd_byte * contents, |
| 4001 | Elf_Internal_Rela * relocs, |
| 4002 | Elf_Internal_Sym * local_syms, |
| 4003 | asection ** local_sections) |
| 4004 | { |
| 4005 | Elf_Internal_Shdr *symtab_hdr; |
| 4006 | struct elf_link_hash_entry **sym_hashes; |
| 4007 | Elf_Internal_Rela *rel; |
| 4008 | Elf_Internal_Rela *relend; |
| 4009 | const char *name; |
| 4010 | struct elf32_arm_link_hash_table * globals; |
| 4011 | |
| 4012 | globals = elf32_arm_hash_table (info); |
| 4013 | if (info->relocatable && !globals->use_rel) |
| 4014 | return TRUE; |
| 4015 | |
| 4016 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
| 4017 | sym_hashes = elf_sym_hashes (input_bfd); |
| 4018 | |
| 4019 | rel = relocs; |
| 4020 | relend = relocs + input_section->reloc_count; |
| 4021 | for (; rel < relend; rel++) |
| 4022 | { |
| 4023 | int r_type; |
| 4024 | reloc_howto_type * howto; |
| 4025 | unsigned long r_symndx; |
| 4026 | Elf_Internal_Sym * sym; |
| 4027 | asection * sec; |
| 4028 | struct elf_link_hash_entry * h; |
| 4029 | bfd_vma relocation; |
| 4030 | bfd_reloc_status_type r; |
| 4031 | arelent bfd_reloc; |
| 4032 | char sym_type; |
| 4033 | bfd_boolean unresolved_reloc = FALSE; |
| 4034 | |
| 4035 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 4036 | r_type = ELF32_R_TYPE (rel->r_info); |
| 4037 | r_type = arm_real_reloc_type (globals, r_type); |
| 4038 | |
| 4039 | if ( r_type == R_ARM_GNU_VTENTRY |
| 4040 | || r_type == R_ARM_GNU_VTINHERIT) |
| 4041 | continue; |
| 4042 | |
| 4043 | bfd_reloc.howto = elf32_arm_howto_from_type (r_type); |
| 4044 | howto = bfd_reloc.howto; |
| 4045 | |
| 4046 | if (info->relocatable && globals->use_rel) |
| 4047 | { |
| 4048 | /* This is a relocatable link. We don't have to change |
| 4049 | anything, unless the reloc is against a section symbol, |
| 4050 | in which case we have to adjust according to where the |
| 4051 | section symbol winds up in the output section. */ |
| 4052 | if (r_symndx < symtab_hdr->sh_info) |
| 4053 | { |
| 4054 | sym = local_syms + r_symndx; |
| 4055 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 4056 | { |
| 4057 | sec = local_sections[r_symndx]; |
| 4058 | arm_add_to_rel (input_bfd, contents + rel->r_offset, |
| 4059 | howto, |
| 4060 | (bfd_signed_vma) (sec->output_offset |
| 4061 | + sym->st_value)); |
| 4062 | } |
| 4063 | } |
| 4064 | |
| 4065 | continue; |
| 4066 | } |
| 4067 | |
| 4068 | /* This is a final link. */ |
| 4069 | h = NULL; |
| 4070 | sym = NULL; |
| 4071 | sec = NULL; |
| 4072 | |
| 4073 | if (r_symndx < symtab_hdr->sh_info) |
| 4074 | { |
| 4075 | sym = local_syms + r_symndx; |
| 4076 | sym_type = ELF32_ST_TYPE (sym->st_info); |
| 4077 | sec = local_sections[r_symndx]; |
| 4078 | if (globals->use_rel) |
| 4079 | { |
| 4080 | relocation = (sec->output_section->vma |
| 4081 | + sec->output_offset |
| 4082 | + sym->st_value); |
| 4083 | if ((sec->flags & SEC_MERGE) |
| 4084 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 4085 | { |
| 4086 | asection *msec; |
| 4087 | bfd_vma addend, value; |
| 4088 | |
| 4089 | if (howto->rightshift) |
| 4090 | { |
| 4091 | (*_bfd_error_handler) |
| 4092 | (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"), |
| 4093 | input_bfd, input_section, |
| 4094 | (long) rel->r_offset, howto->name); |
| 4095 | return FALSE; |
| 4096 | } |
| 4097 | |
| 4098 | value = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 4099 | |
| 4100 | /* Get the (signed) value from the instruction. */ |
| 4101 | addend = value & howto->src_mask; |
| 4102 | if (addend & ((howto->src_mask + 1) >> 1)) |
| 4103 | { |
| 4104 | bfd_signed_vma mask; |
| 4105 | |
| 4106 | mask = -1; |
| 4107 | mask &= ~ howto->src_mask; |
| 4108 | addend |= mask; |
| 4109 | } |
| 4110 | msec = sec; |
| 4111 | addend = |
| 4112 | _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) |
| 4113 | - relocation; |
| 4114 | addend += msec->output_section->vma + msec->output_offset; |
| 4115 | value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask); |
| 4116 | bfd_put_32 (input_bfd, value, contents + rel->r_offset); |
| 4117 | } |
| 4118 | } |
| 4119 | else |
| 4120 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 4121 | } |
| 4122 | else |
| 4123 | { |
| 4124 | bfd_boolean warned; |
| 4125 | |
| 4126 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 4127 | r_symndx, symtab_hdr, sym_hashes, |
| 4128 | h, sec, relocation, |
| 4129 | unresolved_reloc, warned); |
| 4130 | |
| 4131 | sym_type = h->type; |
| 4132 | } |
| 4133 | |
| 4134 | if (h != NULL) |
| 4135 | name = h->root.root.string; |
| 4136 | else |
| 4137 | { |
| 4138 | name = (bfd_elf_string_from_elf_section |
| 4139 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 4140 | if (name == NULL || *name == '\0') |
| 4141 | name = bfd_section_name (input_bfd, sec); |
| 4142 | } |
| 4143 | |
| 4144 | if (r_symndx != 0 |
| 4145 | && r_type != R_ARM_NONE |
| 4146 | && (h == NULL |
| 4147 | || h->root.type == bfd_link_hash_defined |
| 4148 | || h->root.type == bfd_link_hash_defweak) |
| 4149 | && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS)) |
| 4150 | { |
| 4151 | (*_bfd_error_handler) |
| 4152 | ((sym_type == STT_TLS |
| 4153 | ? _("%B(%A+0x%lx): %s used with TLS symbol %s") |
| 4154 | : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")), |
| 4155 | input_bfd, |
| 4156 | input_section, |
| 4157 | (long) rel->r_offset, |
| 4158 | howto->name, |
| 4159 | name); |
| 4160 | } |
| 4161 | |
| 4162 | r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd, |
| 4163 | input_section, contents, rel, |
| 4164 | relocation, info, sec, name, |
| 4165 | (h ? ELF_ST_TYPE (h->type) : |
| 4166 | ELF_ST_TYPE (sym->st_info)), h, |
| 4167 | &unresolved_reloc); |
| 4168 | |
| 4169 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| 4170 | because such sections are not SEC_ALLOC and thus ld.so will |
| 4171 | not process them. */ |
| 4172 | if (unresolved_reloc |
| 4173 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
| 4174 | && h->def_dynamic)) |
| 4175 | { |
| 4176 | (*_bfd_error_handler) |
| 4177 | (_("%B(%A+0x%lx): warning: unresolvable relocation %d against symbol `%s'"), |
| 4178 | input_bfd, input_section, (long) rel->r_offset, |
| 4179 | r_type, h->root.root.string); |
| 4180 | return FALSE; |
| 4181 | } |
| 4182 | |
| 4183 | if (r != bfd_reloc_ok) |
| 4184 | { |
| 4185 | const char * msg = (const char *) 0; |
| 4186 | |
| 4187 | switch (r) |
| 4188 | { |
| 4189 | case bfd_reloc_overflow: |
| 4190 | /* If the overflowing reloc was to an undefined symbol, |
| 4191 | we have already printed one error message and there |
| 4192 | is no point complaining again. */ |
| 4193 | if ((! h || |
| 4194 | h->root.type != bfd_link_hash_undefined) |
| 4195 | && (!((*info->callbacks->reloc_overflow) |
| 4196 | (info, (h ? &h->root : NULL), name, howto->name, |
| 4197 | (bfd_vma) 0, input_bfd, input_section, |
| 4198 | rel->r_offset)))) |
| 4199 | return FALSE; |
| 4200 | break; |
| 4201 | |
| 4202 | case bfd_reloc_undefined: |
| 4203 | if (!((*info->callbacks->undefined_symbol) |
| 4204 | (info, name, input_bfd, input_section, |
| 4205 | rel->r_offset, TRUE))) |
| 4206 | return FALSE; |
| 4207 | break; |
| 4208 | |
| 4209 | case bfd_reloc_outofrange: |
| 4210 | msg = _("internal error: out of range error"); |
| 4211 | goto common_error; |
| 4212 | |
| 4213 | case bfd_reloc_notsupported: |
| 4214 | msg = _("internal error: unsupported relocation error"); |
| 4215 | goto common_error; |
| 4216 | |
| 4217 | case bfd_reloc_dangerous: |
| 4218 | msg = _("internal error: dangerous error"); |
| 4219 | goto common_error; |
| 4220 | |
| 4221 | default: |
| 4222 | msg = _("internal error: unknown error"); |
| 4223 | /* fall through */ |
| 4224 | |
| 4225 | common_error: |
| 4226 | if (!((*info->callbacks->warning) |
| 4227 | (info, msg, name, input_bfd, input_section, |
| 4228 | rel->r_offset))) |
| 4229 | return FALSE; |
| 4230 | break; |
| 4231 | } |
| 4232 | } |
| 4233 | } |
| 4234 | |
| 4235 | return TRUE; |
| 4236 | } |
| 4237 | |
| 4238 | /* Set the right machine number. */ |
| 4239 | |
| 4240 | static bfd_boolean |
| 4241 | elf32_arm_object_p (bfd *abfd) |
| 4242 | { |
| 4243 | unsigned int mach; |
| 4244 | |
| 4245 | mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION); |
| 4246 | |
| 4247 | if (mach != bfd_mach_arm_unknown) |
| 4248 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach); |
| 4249 | |
| 4250 | else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT) |
| 4251 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312); |
| 4252 | |
| 4253 | else |
| 4254 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach); |
| 4255 | |
| 4256 | return TRUE; |
| 4257 | } |
| 4258 | |
| 4259 | /* Function to keep ARM specific flags in the ELF header. */ |
| 4260 | |
| 4261 | static bfd_boolean |
| 4262 | elf32_arm_set_private_flags (bfd *abfd, flagword flags) |
| 4263 | { |
| 4264 | if (elf_flags_init (abfd) |
| 4265 | && elf_elfheader (abfd)->e_flags != flags) |
| 4266 | { |
| 4267 | if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN) |
| 4268 | { |
| 4269 | if (flags & EF_ARM_INTERWORK) |
| 4270 | (*_bfd_error_handler) |
| 4271 | (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"), |
| 4272 | abfd); |
| 4273 | else |
| 4274 | _bfd_error_handler |
| 4275 | (_("Warning: Clearing the interworking flag of %B due to outside request"), |
| 4276 | abfd); |
| 4277 | } |
| 4278 | } |
| 4279 | else |
| 4280 | { |
| 4281 | elf_elfheader (abfd)->e_flags = flags; |
| 4282 | elf_flags_init (abfd) = TRUE; |
| 4283 | } |
| 4284 | |
| 4285 | return TRUE; |
| 4286 | } |
| 4287 | |
| 4288 | /* Copy backend specific data from one object module to another. */ |
| 4289 | |
| 4290 | static bfd_boolean |
| 4291 | elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 4292 | { |
| 4293 | flagword in_flags; |
| 4294 | flagword out_flags; |
| 4295 | |
| 4296 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 4297 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 4298 | return TRUE; |
| 4299 | |
| 4300 | in_flags = elf_elfheader (ibfd)->e_flags; |
| 4301 | out_flags = elf_elfheader (obfd)->e_flags; |
| 4302 | |
| 4303 | if (elf_flags_init (obfd) |
| 4304 | && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN |
| 4305 | && in_flags != out_flags) |
| 4306 | { |
| 4307 | /* Cannot mix APCS26 and APCS32 code. */ |
| 4308 | if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) |
| 4309 | return FALSE; |
| 4310 | |
| 4311 | /* Cannot mix float APCS and non-float APCS code. */ |
| 4312 | if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) |
| 4313 | return FALSE; |
| 4314 | |
| 4315 | /* If the src and dest have different interworking flags |
| 4316 | then turn off the interworking bit. */ |
| 4317 | if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) |
| 4318 | { |
| 4319 | if (out_flags & EF_ARM_INTERWORK) |
| 4320 | _bfd_error_handler |
| 4321 | (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"), |
| 4322 | obfd, ibfd); |
| 4323 | |
| 4324 | in_flags &= ~EF_ARM_INTERWORK; |
| 4325 | } |
| 4326 | |
| 4327 | /* Likewise for PIC, though don't warn for this case. */ |
| 4328 | if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC)) |
| 4329 | in_flags &= ~EF_ARM_PIC; |
| 4330 | } |
| 4331 | |
| 4332 | elf_elfheader (obfd)->e_flags = in_flags; |
| 4333 | elf_flags_init (obfd) = TRUE; |
| 4334 | |
| 4335 | /* Also copy the EI_OSABI field. */ |
| 4336 | elf_elfheader (obfd)->e_ident[EI_OSABI] = |
| 4337 | elf_elfheader (ibfd)->e_ident[EI_OSABI]; |
| 4338 | |
| 4339 | return TRUE; |
| 4340 | } |
| 4341 | |
| 4342 | /* Merge backend specific data from an object file to the output |
| 4343 | object file when linking. */ |
| 4344 | |
| 4345 | static bfd_boolean |
| 4346 | elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd) |
| 4347 | { |
| 4348 | flagword out_flags; |
| 4349 | flagword in_flags; |
| 4350 | bfd_boolean flags_compatible = TRUE; |
| 4351 | asection *sec; |
| 4352 | |
| 4353 | /* Check if we have the same endianess. */ |
| 4354 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) |
| 4355 | return FALSE; |
| 4356 | |
| 4357 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 4358 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 4359 | return TRUE; |
| 4360 | |
| 4361 | /* The input BFD must have had its flags initialised. */ |
| 4362 | /* The following seems bogus to me -- The flags are initialized in |
| 4363 | the assembler but I don't think an elf_flags_init field is |
| 4364 | written into the object. */ |
| 4365 | /* BFD_ASSERT (elf_flags_init (ibfd)); */ |
| 4366 | |
| 4367 | in_flags = elf_elfheader (ibfd)->e_flags; |
| 4368 | out_flags = elf_elfheader (obfd)->e_flags; |
| 4369 | |
| 4370 | if (!elf_flags_init (obfd)) |
| 4371 | { |
| 4372 | /* If the input is the default architecture and had the default |
| 4373 | flags then do not bother setting the flags for the output |
| 4374 | architecture, instead allow future merges to do this. If no |
| 4375 | future merges ever set these flags then they will retain their |
| 4376 | uninitialised values, which surprise surprise, correspond |
| 4377 | to the default values. */ |
| 4378 | if (bfd_get_arch_info (ibfd)->the_default |
| 4379 | && elf_elfheader (ibfd)->e_flags == 0) |
| 4380 | return TRUE; |
| 4381 | |
| 4382 | elf_flags_init (obfd) = TRUE; |
| 4383 | elf_elfheader (obfd)->e_flags = in_flags; |
| 4384 | |
| 4385 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
| 4386 | && bfd_get_arch_info (obfd)->the_default) |
| 4387 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); |
| 4388 | |
| 4389 | return TRUE; |
| 4390 | } |
| 4391 | |
| 4392 | /* Determine what should happen if the input ARM architecture |
| 4393 | does not match the output ARM architecture. */ |
| 4394 | if (! bfd_arm_merge_machines (ibfd, obfd)) |
| 4395 | return FALSE; |
| 4396 | |
| 4397 | /* Identical flags must be compatible. */ |
| 4398 | if (in_flags == out_flags) |
| 4399 | return TRUE; |
| 4400 | |
| 4401 | /* Check to see if the input BFD actually contains any sections. If |
| 4402 | not, its flags may not have been initialised either, but it |
| 4403 | cannot actually cause any incompatibility. Do not short-circuit |
| 4404 | dynamic objects; their section list may be emptied by |
| 4405 | elf_link_add_object_symbols. |
| 4406 | |
| 4407 | Also check to see if there are no code sections in the input. |
| 4408 | In this case there is no need to check for code specific flags. |
| 4409 | XXX - do we need to worry about floating-point format compatability |
| 4410 | in data sections ? */ |
| 4411 | if (!(ibfd->flags & DYNAMIC)) |
| 4412 | { |
| 4413 | bfd_boolean null_input_bfd = TRUE; |
| 4414 | bfd_boolean only_data_sections = TRUE; |
| 4415 | |
| 4416 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 4417 | { |
| 4418 | /* Ignore synthetic glue sections. */ |
| 4419 | if (strcmp (sec->name, ".glue_7") |
| 4420 | && strcmp (sec->name, ".glue_7t")) |
| 4421 | { |
| 4422 | if ((bfd_get_section_flags (ibfd, sec) |
| 4423 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) |
| 4424 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) |
| 4425 | only_data_sections = FALSE; |
| 4426 | |
| 4427 | null_input_bfd = FALSE; |
| 4428 | break; |
| 4429 | } |
| 4430 | } |
| 4431 | |
| 4432 | if (null_input_bfd || only_data_sections) |
| 4433 | return TRUE; |
| 4434 | } |
| 4435 | |
| 4436 | /* Complain about various flag mismatches. */ |
| 4437 | if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags)) |
| 4438 | { |
| 4439 | _bfd_error_handler |
| 4440 | (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"), |
| 4441 | ibfd, obfd, |
| 4442 | (in_flags & EF_ARM_EABIMASK) >> 24, |
| 4443 | (out_flags & EF_ARM_EABIMASK) >> 24); |
| 4444 | return FALSE; |
| 4445 | } |
| 4446 | |
| 4447 | /* Not sure what needs to be checked for EABI versions >= 1. */ |
| 4448 | if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN) |
| 4449 | { |
| 4450 | if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) |
| 4451 | { |
| 4452 | _bfd_error_handler |
| 4453 | (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"), |
| 4454 | ibfd, obfd, |
| 4455 | in_flags & EF_ARM_APCS_26 ? 26 : 32, |
| 4456 | out_flags & EF_ARM_APCS_26 ? 26 : 32); |
| 4457 | flags_compatible = FALSE; |
| 4458 | } |
| 4459 | |
| 4460 | if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) |
| 4461 | { |
| 4462 | if (in_flags & EF_ARM_APCS_FLOAT) |
| 4463 | _bfd_error_handler |
| 4464 | (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"), |
| 4465 | ibfd, obfd); |
| 4466 | else |
| 4467 | _bfd_error_handler |
| 4468 | (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"), |
| 4469 | ibfd, obfd); |
| 4470 | |
| 4471 | flags_compatible = FALSE; |
| 4472 | } |
| 4473 | |
| 4474 | if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT)) |
| 4475 | { |
| 4476 | if (in_flags & EF_ARM_VFP_FLOAT) |
| 4477 | _bfd_error_handler |
| 4478 | (_("ERROR: %B uses VFP instructions, whereas %B does not"), |
| 4479 | ibfd, obfd); |
| 4480 | else |
| 4481 | _bfd_error_handler |
| 4482 | (_("ERROR: %B uses FPA instructions, whereas %B does not"), |
| 4483 | ibfd, obfd); |
| 4484 | |
| 4485 | flags_compatible = FALSE; |
| 4486 | } |
| 4487 | |
| 4488 | if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT)) |
| 4489 | { |
| 4490 | if (in_flags & EF_ARM_MAVERICK_FLOAT) |
| 4491 | _bfd_error_handler |
| 4492 | (_("ERROR: %B uses Maverick instructions, whereas %B does not"), |
| 4493 | ibfd, obfd); |
| 4494 | else |
| 4495 | _bfd_error_handler |
| 4496 | (_("ERROR: %B does not use Maverick instructions, whereas %B does"), |
| 4497 | ibfd, obfd); |
| 4498 | |
| 4499 | flags_compatible = FALSE; |
| 4500 | } |
| 4501 | |
| 4502 | #ifdef EF_ARM_SOFT_FLOAT |
| 4503 | if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT)) |
| 4504 | { |
| 4505 | /* We can allow interworking between code that is VFP format |
| 4506 | layout, and uses either soft float or integer regs for |
| 4507 | passing floating point arguments and results. We already |
| 4508 | know that the APCS_FLOAT flags match; similarly for VFP |
| 4509 | flags. */ |
| 4510 | if ((in_flags & EF_ARM_APCS_FLOAT) != 0 |
| 4511 | || (in_flags & EF_ARM_VFP_FLOAT) == 0) |
| 4512 | { |
| 4513 | if (in_flags & EF_ARM_SOFT_FLOAT) |
| 4514 | _bfd_error_handler |
| 4515 | (_("ERROR: %B uses software FP, whereas %B uses hardware FP"), |
| 4516 | ibfd, obfd); |
| 4517 | else |
| 4518 | _bfd_error_handler |
| 4519 | (_("ERROR: %B uses hardware FP, whereas %B uses software FP"), |
| 4520 | ibfd, obfd); |
| 4521 | |
| 4522 | flags_compatible = FALSE; |
| 4523 | } |
| 4524 | } |
| 4525 | #endif |
| 4526 | |
| 4527 | /* Interworking mismatch is only a warning. */ |
| 4528 | if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) |
| 4529 | { |
| 4530 | if (in_flags & EF_ARM_INTERWORK) |
| 4531 | { |
| 4532 | _bfd_error_handler |
| 4533 | (_("Warning: %B supports interworking, whereas %B does not"), |
| 4534 | ibfd, obfd); |
| 4535 | } |
| 4536 | else |
| 4537 | { |
| 4538 | _bfd_error_handler |
| 4539 | (_("Warning: %B does not support interworking, whereas %B does"), |
| 4540 | ibfd, obfd); |
| 4541 | } |
| 4542 | } |
| 4543 | } |
| 4544 | |
| 4545 | return flags_compatible; |
| 4546 | } |
| 4547 | |
| 4548 | /* Display the flags field. */ |
| 4549 | |
| 4550 | static bfd_boolean |
| 4551 | elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr) |
| 4552 | { |
| 4553 | FILE * file = (FILE *) ptr; |
| 4554 | unsigned long flags; |
| 4555 | |
| 4556 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 4557 | |
| 4558 | /* Print normal ELF private data. */ |
| 4559 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 4560 | |
| 4561 | flags = elf_elfheader (abfd)->e_flags; |
| 4562 | /* Ignore init flag - it may not be set, despite the flags field |
| 4563 | containing valid data. */ |
| 4564 | |
| 4565 | /* xgettext:c-format */ |
| 4566 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| 4567 | |
| 4568 | switch (EF_ARM_EABI_VERSION (flags)) |
| 4569 | { |
| 4570 | case EF_ARM_EABI_UNKNOWN: |
| 4571 | /* The following flag bits are GNU extensions and not part of the |
| 4572 | official ARM ELF extended ABI. Hence they are only decoded if |
| 4573 | the EABI version is not set. */ |
| 4574 | if (flags & EF_ARM_INTERWORK) |
| 4575 | fprintf (file, _(" [interworking enabled]")); |
| 4576 | |
| 4577 | if (flags & EF_ARM_APCS_26) |
| 4578 | fprintf (file, " [APCS-26]"); |
| 4579 | else |
| 4580 | fprintf (file, " [APCS-32]"); |
| 4581 | |
| 4582 | if (flags & EF_ARM_VFP_FLOAT) |
| 4583 | fprintf (file, _(" [VFP float format]")); |
| 4584 | else if (flags & EF_ARM_MAVERICK_FLOAT) |
| 4585 | fprintf (file, _(" [Maverick float format]")); |
| 4586 | else |
| 4587 | fprintf (file, _(" [FPA float format]")); |
| 4588 | |
| 4589 | if (flags & EF_ARM_APCS_FLOAT) |
| 4590 | fprintf (file, _(" [floats passed in float registers]")); |
| 4591 | |
| 4592 | if (flags & EF_ARM_PIC) |
| 4593 | fprintf (file, _(" [position independent]")); |
| 4594 | |
| 4595 | if (flags & EF_ARM_NEW_ABI) |
| 4596 | fprintf (file, _(" [new ABI]")); |
| 4597 | |
| 4598 | if (flags & EF_ARM_OLD_ABI) |
| 4599 | fprintf (file, _(" [old ABI]")); |
| 4600 | |
| 4601 | if (flags & EF_ARM_SOFT_FLOAT) |
| 4602 | fprintf (file, _(" [software FP]")); |
| 4603 | |
| 4604 | flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT |
| 4605 | | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI |
| 4606 | | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT |
| 4607 | | EF_ARM_MAVERICK_FLOAT); |
| 4608 | break; |
| 4609 | |
| 4610 | case EF_ARM_EABI_VER1: |
| 4611 | fprintf (file, _(" [Version1 EABI]")); |
| 4612 | |
| 4613 | if (flags & EF_ARM_SYMSARESORTED) |
| 4614 | fprintf (file, _(" [sorted symbol table]")); |
| 4615 | else |
| 4616 | fprintf (file, _(" [unsorted symbol table]")); |
| 4617 | |
| 4618 | flags &= ~ EF_ARM_SYMSARESORTED; |
| 4619 | break; |
| 4620 | |
| 4621 | case EF_ARM_EABI_VER2: |
| 4622 | fprintf (file, _(" [Version2 EABI]")); |
| 4623 | |
| 4624 | if (flags & EF_ARM_SYMSARESORTED) |
| 4625 | fprintf (file, _(" [sorted symbol table]")); |
| 4626 | else |
| 4627 | fprintf (file, _(" [unsorted symbol table]")); |
| 4628 | |
| 4629 | if (flags & EF_ARM_DYNSYMSUSESEGIDX) |
| 4630 | fprintf (file, _(" [dynamic symbols use segment index]")); |
| 4631 | |
| 4632 | if (flags & EF_ARM_MAPSYMSFIRST) |
| 4633 | fprintf (file, _(" [mapping symbols precede others]")); |
| 4634 | |
| 4635 | flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX |
| 4636 | | EF_ARM_MAPSYMSFIRST); |
| 4637 | break; |
| 4638 | |
| 4639 | case EF_ARM_EABI_VER3: |
| 4640 | fprintf (file, _(" [Version3 EABI]")); |
| 4641 | break; |
| 4642 | |
| 4643 | case EF_ARM_EABI_VER4: |
| 4644 | fprintf (file, _(" [Version4 EABI]")); |
| 4645 | |
| 4646 | if (flags & EF_ARM_BE8) |
| 4647 | fprintf (file, _(" [BE8]")); |
| 4648 | |
| 4649 | if (flags & EF_ARM_LE8) |
| 4650 | fprintf (file, _(" [LE8]")); |
| 4651 | |
| 4652 | flags &= ~(EF_ARM_LE8 | EF_ARM_BE8); |
| 4653 | break; |
| 4654 | |
| 4655 | default: |
| 4656 | fprintf (file, _(" <EABI version unrecognised>")); |
| 4657 | break; |
| 4658 | } |
| 4659 | |
| 4660 | flags &= ~ EF_ARM_EABIMASK; |
| 4661 | |
| 4662 | if (flags & EF_ARM_RELEXEC) |
| 4663 | fprintf (file, _(" [relocatable executable]")); |
| 4664 | |
| 4665 | if (flags & EF_ARM_HASENTRY) |
| 4666 | fprintf (file, _(" [has entry point]")); |
| 4667 | |
| 4668 | flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY); |
| 4669 | |
| 4670 | if (flags) |
| 4671 | fprintf (file, _("<Unrecognised flag bits set>")); |
| 4672 | |
| 4673 | fputc ('\n', file); |
| 4674 | |
| 4675 | return TRUE; |
| 4676 | } |
| 4677 | |
| 4678 | static int |
| 4679 | elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type) |
| 4680 | { |
| 4681 | switch (ELF_ST_TYPE (elf_sym->st_info)) |
| 4682 | { |
| 4683 | case STT_ARM_TFUNC: |
| 4684 | return ELF_ST_TYPE (elf_sym->st_info); |
| 4685 | |
| 4686 | case STT_ARM_16BIT: |
| 4687 | /* If the symbol is not an object, return the STT_ARM_16BIT flag. |
| 4688 | This allows us to distinguish between data used by Thumb instructions |
| 4689 | and non-data (which is probably code) inside Thumb regions of an |
| 4690 | executable. */ |
| 4691 | if (type != STT_OBJECT) |
| 4692 | return ELF_ST_TYPE (elf_sym->st_info); |
| 4693 | break; |
| 4694 | |
| 4695 | default: |
| 4696 | break; |
| 4697 | } |
| 4698 | |
| 4699 | return type; |
| 4700 | } |
| 4701 | |
| 4702 | static asection * |
| 4703 | elf32_arm_gc_mark_hook (asection * sec, |
| 4704 | struct bfd_link_info * info ATTRIBUTE_UNUSED, |
| 4705 | Elf_Internal_Rela * rel, |
| 4706 | struct elf_link_hash_entry * h, |
| 4707 | Elf_Internal_Sym * sym) |
| 4708 | { |
| 4709 | if (h != NULL) |
| 4710 | { |
| 4711 | switch (ELF32_R_TYPE (rel->r_info)) |
| 4712 | { |
| 4713 | case R_ARM_GNU_VTINHERIT: |
| 4714 | case R_ARM_GNU_VTENTRY: |
| 4715 | break; |
| 4716 | |
| 4717 | default: |
| 4718 | switch (h->root.type) |
| 4719 | { |
| 4720 | case bfd_link_hash_defined: |
| 4721 | case bfd_link_hash_defweak: |
| 4722 | return h->root.u.def.section; |
| 4723 | |
| 4724 | case bfd_link_hash_common: |
| 4725 | return h->root.u.c.p->section; |
| 4726 | |
| 4727 | default: |
| 4728 | break; |
| 4729 | } |
| 4730 | } |
| 4731 | } |
| 4732 | else |
| 4733 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| 4734 | |
| 4735 | return NULL; |
| 4736 | } |
| 4737 | |
| 4738 | /* Update the got entry reference counts for the section being removed. */ |
| 4739 | |
| 4740 | static bfd_boolean |
| 4741 | elf32_arm_gc_sweep_hook (bfd * abfd, |
| 4742 | struct bfd_link_info * info, |
| 4743 | asection * sec, |
| 4744 | const Elf_Internal_Rela * relocs) |
| 4745 | { |
| 4746 | Elf_Internal_Shdr *symtab_hdr; |
| 4747 | struct elf_link_hash_entry **sym_hashes; |
| 4748 | bfd_signed_vma *local_got_refcounts; |
| 4749 | const Elf_Internal_Rela *rel, *relend; |
| 4750 | struct elf32_arm_link_hash_table * globals; |
| 4751 | |
| 4752 | globals = elf32_arm_hash_table (info); |
| 4753 | |
| 4754 | elf_section_data (sec)->local_dynrel = NULL; |
| 4755 | |
| 4756 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 4757 | sym_hashes = elf_sym_hashes (abfd); |
| 4758 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 4759 | |
| 4760 | relend = relocs + sec->reloc_count; |
| 4761 | for (rel = relocs; rel < relend; rel++) |
| 4762 | { |
| 4763 | unsigned long r_symndx; |
| 4764 | struct elf_link_hash_entry *h = NULL; |
| 4765 | int r_type; |
| 4766 | |
| 4767 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 4768 | if (r_symndx >= symtab_hdr->sh_info) |
| 4769 | { |
| 4770 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 4771 | while (h->root.type == bfd_link_hash_indirect |
| 4772 | || h->root.type == bfd_link_hash_warning) |
| 4773 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 4774 | } |
| 4775 | |
| 4776 | r_type = ELF32_R_TYPE (rel->r_info); |
| 4777 | r_type = arm_real_reloc_type (globals, r_type); |
| 4778 | switch (r_type) |
| 4779 | { |
| 4780 | case R_ARM_GOT32: |
| 4781 | case R_ARM_GOT_PREL: |
| 4782 | case R_ARM_TLS_GD32: |
| 4783 | case R_ARM_TLS_IE32: |
| 4784 | if (h != NULL) |
| 4785 | { |
| 4786 | if (h->got.refcount > 0) |
| 4787 | h->got.refcount -= 1; |
| 4788 | } |
| 4789 | else if (local_got_refcounts != NULL) |
| 4790 | { |
| 4791 | if (local_got_refcounts[r_symndx] > 0) |
| 4792 | local_got_refcounts[r_symndx] -= 1; |
| 4793 | } |
| 4794 | break; |
| 4795 | |
| 4796 | case R_ARM_TLS_LDM32: |
| 4797 | elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1; |
| 4798 | break; |
| 4799 | |
| 4800 | case R_ARM_ABS32: |
| 4801 | case R_ARM_REL32: |
| 4802 | case R_ARM_PC24: |
| 4803 | case R_ARM_PLT32: |
| 4804 | case R_ARM_CALL: |
| 4805 | case R_ARM_JUMP24: |
| 4806 | case R_ARM_PREL31: |
| 4807 | case R_ARM_THM_CALL: |
| 4808 | /* Should the interworking branches be here also? */ |
| 4809 | |
| 4810 | if (h != NULL) |
| 4811 | { |
| 4812 | struct elf32_arm_link_hash_entry *eh; |
| 4813 | struct elf32_arm_relocs_copied **pp; |
| 4814 | struct elf32_arm_relocs_copied *p; |
| 4815 | |
| 4816 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 4817 | |
| 4818 | if (h->plt.refcount > 0) |
| 4819 | { |
| 4820 | h->plt.refcount -= 1; |
| 4821 | if (ELF32_R_TYPE (rel->r_info) == R_ARM_THM_CALL) |
| 4822 | eh->plt_thumb_refcount--; |
| 4823 | } |
| 4824 | |
| 4825 | if (r_type == R_ARM_ABS32 |
| 4826 | || r_type == R_ARM_REL32) |
| 4827 | { |
| 4828 | for (pp = &eh->relocs_copied; (p = *pp) != NULL; |
| 4829 | pp = &p->next) |
| 4830 | if (p->section == sec) |
| 4831 | { |
| 4832 | p->count -= 1; |
| 4833 | if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32) |
| 4834 | p->pc_count -= 1; |
| 4835 | if (p->count == 0) |
| 4836 | *pp = p->next; |
| 4837 | break; |
| 4838 | } |
| 4839 | } |
| 4840 | } |
| 4841 | break; |
| 4842 | |
| 4843 | default: |
| 4844 | break; |
| 4845 | } |
| 4846 | } |
| 4847 | |
| 4848 | return TRUE; |
| 4849 | } |
| 4850 | |
| 4851 | /* Look through the relocs for a section during the first phase. */ |
| 4852 | |
| 4853 | static bfd_boolean |
| 4854 | elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info, |
| 4855 | asection *sec, const Elf_Internal_Rela *relocs) |
| 4856 | { |
| 4857 | Elf_Internal_Shdr *symtab_hdr; |
| 4858 | struct elf_link_hash_entry **sym_hashes; |
| 4859 | struct elf_link_hash_entry **sym_hashes_end; |
| 4860 | const Elf_Internal_Rela *rel; |
| 4861 | const Elf_Internal_Rela *rel_end; |
| 4862 | bfd *dynobj; |
| 4863 | asection *sreloc; |
| 4864 | bfd_vma *local_got_offsets; |
| 4865 | struct elf32_arm_link_hash_table *htab; |
| 4866 | |
| 4867 | if (info->relocatable) |
| 4868 | return TRUE; |
| 4869 | |
| 4870 | htab = elf32_arm_hash_table (info); |
| 4871 | sreloc = NULL; |
| 4872 | |
| 4873 | /* Create dynamic sections for relocatable executables so that we can |
| 4874 | copy relocations. */ |
| 4875 | if (htab->root.is_relocatable_executable |
| 4876 | && ! htab->root.dynamic_sections_created) |
| 4877 | { |
| 4878 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) |
| 4879 | return FALSE; |
| 4880 | } |
| 4881 | |
| 4882 | dynobj = elf_hash_table (info)->dynobj; |
| 4883 | local_got_offsets = elf_local_got_offsets (abfd); |
| 4884 | |
| 4885 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 4886 | sym_hashes = elf_sym_hashes (abfd); |
| 4887 | sym_hashes_end = sym_hashes |
| 4888 | + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); |
| 4889 | |
| 4890 | if (!elf_bad_symtab (abfd)) |
| 4891 | sym_hashes_end -= symtab_hdr->sh_info; |
| 4892 | |
| 4893 | rel_end = relocs + sec->reloc_count; |
| 4894 | for (rel = relocs; rel < rel_end; rel++) |
| 4895 | { |
| 4896 | struct elf_link_hash_entry *h; |
| 4897 | struct elf32_arm_link_hash_entry *eh; |
| 4898 | unsigned long r_symndx; |
| 4899 | int r_type; |
| 4900 | |
| 4901 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 4902 | r_type = ELF32_R_TYPE (rel->r_info); |
| 4903 | r_type = arm_real_reloc_type (htab, r_type); |
| 4904 | |
| 4905 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
| 4906 | { |
| 4907 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd, |
| 4908 | r_symndx); |
| 4909 | return FALSE; |
| 4910 | } |
| 4911 | |
| 4912 | if (r_symndx < symtab_hdr->sh_info) |
| 4913 | h = NULL; |
| 4914 | else |
| 4915 | { |
| 4916 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 4917 | while (h->root.type == bfd_link_hash_indirect |
| 4918 | || h->root.type == bfd_link_hash_warning) |
| 4919 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 4920 | } |
| 4921 | |
| 4922 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 4923 | |
| 4924 | switch (r_type) |
| 4925 | { |
| 4926 | case R_ARM_GOT32: |
| 4927 | case R_ARM_GOT_PREL: |
| 4928 | case R_ARM_TLS_GD32: |
| 4929 | case R_ARM_TLS_IE32: |
| 4930 | /* This symbol requires a global offset table entry. */ |
| 4931 | { |
| 4932 | int tls_type, old_tls_type; |
| 4933 | |
| 4934 | switch (r_type) |
| 4935 | { |
| 4936 | case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break; |
| 4937 | case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break; |
| 4938 | default: tls_type = GOT_NORMAL; break; |
| 4939 | } |
| 4940 | |
| 4941 | if (h != NULL) |
| 4942 | { |
| 4943 | h->got.refcount++; |
| 4944 | old_tls_type = elf32_arm_hash_entry (h)->tls_type; |
| 4945 | } |
| 4946 | else |
| 4947 | { |
| 4948 | bfd_signed_vma *local_got_refcounts; |
| 4949 | |
| 4950 | /* This is a global offset table entry for a local symbol. */ |
| 4951 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 4952 | if (local_got_refcounts == NULL) |
| 4953 | { |
| 4954 | bfd_size_type size; |
| 4955 | |
| 4956 | size = symtab_hdr->sh_info; |
| 4957 | size *= (sizeof (bfd_signed_vma) + sizeof(char)); |
| 4958 | local_got_refcounts = bfd_zalloc (abfd, size); |
| 4959 | if (local_got_refcounts == NULL) |
| 4960 | return FALSE; |
| 4961 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 4962 | elf32_arm_local_got_tls_type (abfd) |
| 4963 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); |
| 4964 | } |
| 4965 | local_got_refcounts[r_symndx] += 1; |
| 4966 | old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx]; |
| 4967 | } |
| 4968 | |
| 4969 | /* We will already have issued an error message if there is a |
| 4970 | TLS / non-TLS mismatch, based on the symbol type. We don't |
| 4971 | support any linker relaxations. So just combine any TLS |
| 4972 | types needed. */ |
| 4973 | if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL |
| 4974 | && tls_type != GOT_NORMAL) |
| 4975 | tls_type |= old_tls_type; |
| 4976 | |
| 4977 | if (old_tls_type != tls_type) |
| 4978 | { |
| 4979 | if (h != NULL) |
| 4980 | elf32_arm_hash_entry (h)->tls_type = tls_type; |
| 4981 | else |
| 4982 | elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type; |
| 4983 | } |
| 4984 | } |
| 4985 | /* Fall through */ |
| 4986 | |
| 4987 | case R_ARM_TLS_LDM32: |
| 4988 | if (r_type == R_ARM_TLS_LDM32) |
| 4989 | htab->tls_ldm_got.refcount++; |
| 4990 | /* Fall through */ |
| 4991 | |
| 4992 | case R_ARM_GOTOFF32: |
| 4993 | case R_ARM_GOTPC: |
| 4994 | if (htab->sgot == NULL) |
| 4995 | { |
| 4996 | if (htab->root.dynobj == NULL) |
| 4997 | htab->root.dynobj = abfd; |
| 4998 | if (!create_got_section (htab->root.dynobj, info)) |
| 4999 | return FALSE; |
| 5000 | } |
| 5001 | break; |
| 5002 | |
| 5003 | case R_ARM_ABS32: |
| 5004 | case R_ARM_REL32: |
| 5005 | case R_ARM_PC24: |
| 5006 | case R_ARM_PLT32: |
| 5007 | case R_ARM_CALL: |
| 5008 | case R_ARM_JUMP24: |
| 5009 | case R_ARM_PREL31: |
| 5010 | case R_ARM_THM_CALL: |
| 5011 | /* Should the interworking branches be listed here? */ |
| 5012 | if (h != NULL) |
| 5013 | { |
| 5014 | /* If this reloc is in a read-only section, we might |
| 5015 | need a copy reloc. We can't check reliably at this |
| 5016 | stage whether the section is read-only, as input |
| 5017 | sections have not yet been mapped to output sections. |
| 5018 | Tentatively set the flag for now, and correct in |
| 5019 | adjust_dynamic_symbol. */ |
| 5020 | if (!info->shared) |
| 5021 | h->non_got_ref = 1; |
| 5022 | |
| 5023 | /* We may need a .plt entry if the function this reloc |
| 5024 | refers to is in a different object. We can't tell for |
| 5025 | sure yet, because something later might force the |
| 5026 | symbol local. */ |
| 5027 | if (r_type == R_ARM_PC24 |
| 5028 | || r_type == R_ARM_CALL |
| 5029 | || r_type == R_ARM_JUMP24 |
| 5030 | || r_type == R_ARM_PREL31 |
| 5031 | || r_type == R_ARM_PLT32 |
| 5032 | || r_type == R_ARM_THM_CALL) |
| 5033 | h->needs_plt = 1; |
| 5034 | |
| 5035 | /* If we create a PLT entry, this relocation will reference |
| 5036 | it, even if it's an ABS32 relocation. */ |
| 5037 | h->plt.refcount += 1; |
| 5038 | |
| 5039 | if (r_type == R_ARM_THM_CALL) |
| 5040 | eh->plt_thumb_refcount += 1; |
| 5041 | } |
| 5042 | |
| 5043 | /* If we are creating a shared library or relocatable executable, |
| 5044 | and this is a reloc against a global symbol, or a non PC |
| 5045 | relative reloc against a local symbol, then we need to copy |
| 5046 | the reloc into the shared library. However, if we are linking |
| 5047 | with -Bsymbolic, we do not need to copy a reloc against a |
| 5048 | global symbol which is defined in an object we are |
| 5049 | including in the link (i.e., DEF_REGULAR is set). At |
| 5050 | this point we have not seen all the input files, so it is |
| 5051 | possible that DEF_REGULAR is not set now but will be set |
| 5052 | later (it is never cleared). We account for that |
| 5053 | possibility below by storing information in the |
| 5054 | relocs_copied field of the hash table entry. */ |
| 5055 | if ((info->shared || htab->root.is_relocatable_executable) |
| 5056 | && (sec->flags & SEC_ALLOC) != 0 |
| 5057 | && (r_type == R_ARM_ABS32 |
| 5058 | || (h != NULL && ! h->needs_plt |
| 5059 | && (! info->symbolic || ! h->def_regular)))) |
| 5060 | { |
| 5061 | struct elf32_arm_relocs_copied *p, **head; |
| 5062 | |
| 5063 | /* When creating a shared object, we must copy these |
| 5064 | reloc types into the output file. We create a reloc |
| 5065 | section in dynobj and make room for this reloc. */ |
| 5066 | if (sreloc == NULL) |
| 5067 | { |
| 5068 | const char * name; |
| 5069 | |
| 5070 | name = (bfd_elf_string_from_elf_section |
| 5071 | (abfd, |
| 5072 | elf_elfheader (abfd)->e_shstrndx, |
| 5073 | elf_section_data (sec)->rel_hdr.sh_name)); |
| 5074 | if (name == NULL) |
| 5075 | return FALSE; |
| 5076 | |
| 5077 | BFD_ASSERT (strncmp (name, ".rel", 4) == 0 |
| 5078 | && strcmp (bfd_get_section_name (abfd, sec), |
| 5079 | name + 4) == 0); |
| 5080 | |
| 5081 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 5082 | if (sreloc == NULL) |
| 5083 | { |
| 5084 | flagword flags; |
| 5085 | |
| 5086 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
| 5087 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 5088 | if ((sec->flags & SEC_ALLOC) != 0 |
| 5089 | /* BPABI objects never have dynamic |
| 5090 | relocations mapped. */ |
| 5091 | && !htab->symbian_p) |
| 5092 | flags |= SEC_ALLOC | SEC_LOAD; |
| 5093 | sreloc = bfd_make_section_with_flags (dynobj, |
| 5094 | name, |
| 5095 | flags); |
| 5096 | if (sreloc == NULL |
| 5097 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) |
| 5098 | return FALSE; |
| 5099 | } |
| 5100 | |
| 5101 | elf_section_data (sec)->sreloc = sreloc; |
| 5102 | } |
| 5103 | |
| 5104 | /* If this is a global symbol, we count the number of |
| 5105 | relocations we need for this symbol. */ |
| 5106 | if (h != NULL) |
| 5107 | { |
| 5108 | head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied; |
| 5109 | } |
| 5110 | else |
| 5111 | { |
| 5112 | /* Track dynamic relocs needed for local syms too. |
| 5113 | We really need local syms available to do this |
| 5114 | easily. Oh well. */ |
| 5115 | |
| 5116 | asection *s; |
| 5117 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, |
| 5118 | sec, r_symndx); |
| 5119 | if (s == NULL) |
| 5120 | return FALSE; |
| 5121 | |
| 5122 | head = ((struct elf32_arm_relocs_copied **) |
| 5123 | &elf_section_data (s)->local_dynrel); |
| 5124 | } |
| 5125 | |
| 5126 | p = *head; |
| 5127 | if (p == NULL || p->section != sec) |
| 5128 | { |
| 5129 | bfd_size_type amt = sizeof *p; |
| 5130 | |
| 5131 | p = bfd_alloc (htab->root.dynobj, amt); |
| 5132 | if (p == NULL) |
| 5133 | return FALSE; |
| 5134 | p->next = *head; |
| 5135 | *head = p; |
| 5136 | p->section = sec; |
| 5137 | p->count = 0; |
| 5138 | p->pc_count = 0; |
| 5139 | } |
| 5140 | |
| 5141 | if (r_type == R_ARM_REL32) |
| 5142 | p->pc_count += 1; |
| 5143 | p->count += 1; |
| 5144 | } |
| 5145 | break; |
| 5146 | |
| 5147 | /* This relocation describes the C++ object vtable hierarchy. |
| 5148 | Reconstruct it for later use during GC. */ |
| 5149 | case R_ARM_GNU_VTINHERIT: |
| 5150 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 5151 | return FALSE; |
| 5152 | break; |
| 5153 | |
| 5154 | /* This relocation describes which C++ vtable entries are actually |
| 5155 | used. Record for later use during GC. */ |
| 5156 | case R_ARM_GNU_VTENTRY: |
| 5157 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
| 5158 | return FALSE; |
| 5159 | break; |
| 5160 | } |
| 5161 | } |
| 5162 | |
| 5163 | return TRUE; |
| 5164 | } |
| 5165 | |
| 5166 | /* Treat mapping symbols as special target symbols. */ |
| 5167 | |
| 5168 | static bfd_boolean |
| 5169 | elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym) |
| 5170 | { |
| 5171 | return bfd_is_arm_mapping_symbol_name (sym->name); |
| 5172 | } |
| 5173 | |
| 5174 | /* This is a copy of elf_find_function() from elf.c except that |
| 5175 | ARM mapping symbols are ignored when looking for function names |
| 5176 | and STT_ARM_TFUNC is considered to a function type. */ |
| 5177 | |
| 5178 | static bfd_boolean |
| 5179 | arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED, |
| 5180 | asection * section, |
| 5181 | asymbol ** symbols, |
| 5182 | bfd_vma offset, |
| 5183 | const char ** filename_ptr, |
| 5184 | const char ** functionname_ptr) |
| 5185 | { |
| 5186 | const char * filename = NULL; |
| 5187 | asymbol * func = NULL; |
| 5188 | bfd_vma low_func = 0; |
| 5189 | asymbol ** p; |
| 5190 | |
| 5191 | for (p = symbols; *p != NULL; p++) |
| 5192 | { |
| 5193 | elf_symbol_type *q; |
| 5194 | |
| 5195 | q = (elf_symbol_type *) *p; |
| 5196 | |
| 5197 | switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) |
| 5198 | { |
| 5199 | default: |
| 5200 | break; |
| 5201 | case STT_FILE: |
| 5202 | filename = bfd_asymbol_name (&q->symbol); |
| 5203 | break; |
| 5204 | case STT_FUNC: |
| 5205 | case STT_ARM_TFUNC: |
| 5206 | case STT_NOTYPE: |
| 5207 | /* Skip $a and $t symbols. */ |
| 5208 | if ((q->symbol.flags & BSF_LOCAL) |
| 5209 | && bfd_is_arm_mapping_symbol_name (q->symbol.name)) |
| 5210 | continue; |
| 5211 | /* Fall through. */ |
| 5212 | if (bfd_get_section (&q->symbol) == section |
| 5213 | && q->symbol.value >= low_func |
| 5214 | && q->symbol.value <= offset) |
| 5215 | { |
| 5216 | func = (asymbol *) q; |
| 5217 | low_func = q->symbol.value; |
| 5218 | } |
| 5219 | break; |
| 5220 | } |
| 5221 | } |
| 5222 | |
| 5223 | if (func == NULL) |
| 5224 | return FALSE; |
| 5225 | |
| 5226 | if (filename_ptr) |
| 5227 | *filename_ptr = filename; |
| 5228 | if (functionname_ptr) |
| 5229 | *functionname_ptr = bfd_asymbol_name (func); |
| 5230 | |
| 5231 | return TRUE; |
| 5232 | } |
| 5233 | |
| 5234 | |
| 5235 | /* Find the nearest line to a particular section and offset, for error |
| 5236 | reporting. This code is a duplicate of the code in elf.c, except |
| 5237 | that it uses arm_elf_find_function. */ |
| 5238 | |
| 5239 | static bfd_boolean |
| 5240 | elf32_arm_find_nearest_line (bfd * abfd, |
| 5241 | asection * section, |
| 5242 | asymbol ** symbols, |
| 5243 | bfd_vma offset, |
| 5244 | const char ** filename_ptr, |
| 5245 | const char ** functionname_ptr, |
| 5246 | unsigned int * line_ptr) |
| 5247 | { |
| 5248 | bfd_boolean found = FALSE; |
| 5249 | |
| 5250 | /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */ |
| 5251 | |
| 5252 | if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, |
| 5253 | filename_ptr, functionname_ptr, |
| 5254 | line_ptr, 0, |
| 5255 | & elf_tdata (abfd)->dwarf2_find_line_info)) |
| 5256 | { |
| 5257 | if (!*functionname_ptr) |
| 5258 | arm_elf_find_function (abfd, section, symbols, offset, |
| 5259 | *filename_ptr ? NULL : filename_ptr, |
| 5260 | functionname_ptr); |
| 5261 | |
| 5262 | return TRUE; |
| 5263 | } |
| 5264 | |
| 5265 | if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, |
| 5266 | & found, filename_ptr, |
| 5267 | functionname_ptr, line_ptr, |
| 5268 | & elf_tdata (abfd)->line_info)) |
| 5269 | return FALSE; |
| 5270 | |
| 5271 | if (found && (*functionname_ptr || *line_ptr)) |
| 5272 | return TRUE; |
| 5273 | |
| 5274 | if (symbols == NULL) |
| 5275 | return FALSE; |
| 5276 | |
| 5277 | if (! arm_elf_find_function (abfd, section, symbols, offset, |
| 5278 | filename_ptr, functionname_ptr)) |
| 5279 | return FALSE; |
| 5280 | |
| 5281 | *line_ptr = 0; |
| 5282 | return TRUE; |
| 5283 | } |
| 5284 | |
| 5285 | static bfd_boolean |
| 5286 | elf32_arm_find_inliner_info (bfd * abfd, |
| 5287 | const char ** filename_ptr, |
| 5288 | const char ** functionname_ptr, |
| 5289 | unsigned int * line_ptr) |
| 5290 | { |
| 5291 | bfd_boolean found; |
| 5292 | found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr, |
| 5293 | functionname_ptr, line_ptr, |
| 5294 | & elf_tdata (abfd)->dwarf2_find_line_info); |
| 5295 | return found; |
| 5296 | } |
| 5297 | |
| 5298 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 5299 | regular object. The current definition is in some section of the |
| 5300 | dynamic object, but we're not including those sections. We have to |
| 5301 | change the definition to something the rest of the link can |
| 5302 | understand. */ |
| 5303 | |
| 5304 | static bfd_boolean |
| 5305 | elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info, |
| 5306 | struct elf_link_hash_entry * h) |
| 5307 | { |
| 5308 | bfd * dynobj; |
| 5309 | asection * s; |
| 5310 | unsigned int power_of_two; |
| 5311 | struct elf32_arm_link_hash_entry * eh; |
| 5312 | struct elf32_arm_link_hash_table *globals; |
| 5313 | |
| 5314 | globals = elf32_arm_hash_table (info); |
| 5315 | dynobj = elf_hash_table (info)->dynobj; |
| 5316 | |
| 5317 | /* Make sure we know what is going on here. */ |
| 5318 | BFD_ASSERT (dynobj != NULL |
| 5319 | && (h->needs_plt |
| 5320 | || h->u.weakdef != NULL |
| 5321 | || (h->def_dynamic |
| 5322 | && h->ref_regular |
| 5323 | && !h->def_regular))); |
| 5324 | |
| 5325 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 5326 | |
| 5327 | /* If this is a function, put it in the procedure linkage table. We |
| 5328 | will fill in the contents of the procedure linkage table later, |
| 5329 | when we know the address of the .got section. */ |
| 5330 | if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC |
| 5331 | || h->needs_plt) |
| 5332 | { |
| 5333 | if (h->plt.refcount <= 0 |
| 5334 | || SYMBOL_CALLS_LOCAL (info, h) |
| 5335 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 5336 | && h->root.type == bfd_link_hash_undefweak)) |
| 5337 | { |
| 5338 | /* This case can occur if we saw a PLT32 reloc in an input |
| 5339 | file, but the symbol was never referred to by a dynamic |
| 5340 | object, or if all references were garbage collected. In |
| 5341 | such a case, we don't actually need to build a procedure |
| 5342 | linkage table, and we can just do a PC24 reloc instead. */ |
| 5343 | h->plt.offset = (bfd_vma) -1; |
| 5344 | eh->plt_thumb_refcount = 0; |
| 5345 | h->needs_plt = 0; |
| 5346 | } |
| 5347 | |
| 5348 | return TRUE; |
| 5349 | } |
| 5350 | else |
| 5351 | { |
| 5352 | /* It's possible that we incorrectly decided a .plt reloc was |
| 5353 | needed for an R_ARM_PC24 or similar reloc to a non-function sym |
| 5354 | in check_relocs. We can't decide accurately between function |
| 5355 | and non-function syms in check-relocs; Objects loaded later in |
| 5356 | the link may change h->type. So fix it now. */ |
| 5357 | h->plt.offset = (bfd_vma) -1; |
| 5358 | eh->plt_thumb_refcount = 0; |
| 5359 | } |
| 5360 | |
| 5361 | /* If this is a weak symbol, and there is a real definition, the |
| 5362 | processor independent code will have arranged for us to see the |
| 5363 | real definition first, and we can just use the same value. */ |
| 5364 | if (h->u.weakdef != NULL) |
| 5365 | { |
| 5366 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 5367 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 5368 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 5369 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 5370 | return TRUE; |
| 5371 | } |
| 5372 | |
| 5373 | /* If there are no non-GOT references, we do not need a copy |
| 5374 | relocation. */ |
| 5375 | if (!h->non_got_ref) |
| 5376 | return TRUE; |
| 5377 | |
| 5378 | /* This is a reference to a symbol defined by a dynamic object which |
| 5379 | is not a function. */ |
| 5380 | |
| 5381 | /* If we are creating a shared library, we must presume that the |
| 5382 | only references to the symbol are via the global offset table. |
| 5383 | For such cases we need not do anything here; the relocations will |
| 5384 | be handled correctly by relocate_section. Relocatable executables |
| 5385 | can reference data in shared objects directly, so we don't need to |
| 5386 | do anything here. */ |
| 5387 | if (info->shared || globals->root.is_relocatable_executable) |
| 5388 | return TRUE; |
| 5389 | |
| 5390 | /* We must allocate the symbol in our .dynbss section, which will |
| 5391 | become part of the .bss section of the executable. There will be |
| 5392 | an entry for this symbol in the .dynsym section. The dynamic |
| 5393 | object will contain position independent code, so all references |
| 5394 | from the dynamic object to this symbol will go through the global |
| 5395 | offset table. The dynamic linker will use the .dynsym entry to |
| 5396 | determine the address it must put in the global offset table, so |
| 5397 | both the dynamic object and the regular object will refer to the |
| 5398 | same memory location for the variable. */ |
| 5399 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 5400 | BFD_ASSERT (s != NULL); |
| 5401 | |
| 5402 | /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to |
| 5403 | copy the initial value out of the dynamic object and into the |
| 5404 | runtime process image. We need to remember the offset into the |
| 5405 | .rel.bss section we are going to use. */ |
| 5406 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 5407 | { |
| 5408 | asection *srel; |
| 5409 | |
| 5410 | srel = bfd_get_section_by_name (dynobj, ".rel.bss"); |
| 5411 | BFD_ASSERT (srel != NULL); |
| 5412 | srel->size += sizeof (Elf32_External_Rel); |
| 5413 | h->needs_copy = 1; |
| 5414 | } |
| 5415 | |
| 5416 | /* We need to figure out the alignment required for this symbol. I |
| 5417 | have no idea how ELF linkers handle this. */ |
| 5418 | power_of_two = bfd_log2 (h->size); |
| 5419 | if (power_of_two > 3) |
| 5420 | power_of_two = 3; |
| 5421 | |
| 5422 | /* Apply the required alignment. */ |
| 5423 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
| 5424 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
| 5425 | { |
| 5426 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) |
| 5427 | return FALSE; |
| 5428 | } |
| 5429 | |
| 5430 | /* Define the symbol as being at this point in the section. */ |
| 5431 | h->root.u.def.section = s; |
| 5432 | h->root.u.def.value = s->size; |
| 5433 | |
| 5434 | /* Increment the section size to make room for the symbol. */ |
| 5435 | s->size += h->size; |
| 5436 | |
| 5437 | return TRUE; |
| 5438 | } |
| 5439 | |
| 5440 | /* Allocate space in .plt, .got and associated reloc sections for |
| 5441 | dynamic relocs. */ |
| 5442 | |
| 5443 | static bfd_boolean |
| 5444 | allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
| 5445 | { |
| 5446 | struct bfd_link_info *info; |
| 5447 | struct elf32_arm_link_hash_table *htab; |
| 5448 | struct elf32_arm_link_hash_entry *eh; |
| 5449 | struct elf32_arm_relocs_copied *p; |
| 5450 | |
| 5451 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 5452 | |
| 5453 | if (h->root.type == bfd_link_hash_indirect) |
| 5454 | return TRUE; |
| 5455 | |
| 5456 | if (h->root.type == bfd_link_hash_warning) |
| 5457 | /* When warning symbols are created, they **replace** the "real" |
| 5458 | entry in the hash table, thus we never get to see the real |
| 5459 | symbol in a hash traversal. So look at it now. */ |
| 5460 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5461 | |
| 5462 | info = (struct bfd_link_info *) inf; |
| 5463 | htab = elf32_arm_hash_table (info); |
| 5464 | |
| 5465 | if (htab->root.dynamic_sections_created |
| 5466 | && h->plt.refcount > 0) |
| 5467 | { |
| 5468 | /* Make sure this symbol is output as a dynamic symbol. |
| 5469 | Undefined weak syms won't yet be marked as dynamic. */ |
| 5470 | if (h->dynindx == -1 |
| 5471 | && !h->forced_local) |
| 5472 | { |
| 5473 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 5474 | return FALSE; |
| 5475 | } |
| 5476 | |
| 5477 | if (info->shared |
| 5478 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
| 5479 | { |
| 5480 | asection *s = htab->splt; |
| 5481 | |
| 5482 | /* If this is the first .plt entry, make room for the special |
| 5483 | first entry. */ |
| 5484 | if (s->size == 0) |
| 5485 | s->size += htab->plt_header_size; |
| 5486 | |
| 5487 | h->plt.offset = s->size; |
| 5488 | |
| 5489 | /* If we will insert a Thumb trampoline before this PLT, leave room |
| 5490 | for it. */ |
| 5491 | if (!htab->use_blx && eh->plt_thumb_refcount > 0) |
| 5492 | { |
| 5493 | h->plt.offset += PLT_THUMB_STUB_SIZE; |
| 5494 | s->size += PLT_THUMB_STUB_SIZE; |
| 5495 | } |
| 5496 | |
| 5497 | /* If this symbol is not defined in a regular file, and we are |
| 5498 | not generating a shared library, then set the symbol to this |
| 5499 | location in the .plt. This is required to make function |
| 5500 | pointers compare as equal between the normal executable and |
| 5501 | the shared library. */ |
| 5502 | if (! info->shared |
| 5503 | && !h->def_regular) |
| 5504 | { |
| 5505 | h->root.u.def.section = s; |
| 5506 | h->root.u.def.value = h->plt.offset; |
| 5507 | |
| 5508 | /* Make sure the function is not marked as Thumb, in case |
| 5509 | it is the target of an ABS32 relocation, which will |
| 5510 | point to the PLT entry. */ |
| 5511 | if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC) |
| 5512 | h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC); |
| 5513 | } |
| 5514 | |
| 5515 | /* Make room for this entry. */ |
| 5516 | s->size += htab->plt_entry_size; |
| 5517 | |
| 5518 | if (!htab->symbian_p) |
| 5519 | { |
| 5520 | /* We also need to make an entry in the .got.plt section, which |
| 5521 | will be placed in the .got section by the linker script. */ |
| 5522 | eh->plt_got_offset = htab->sgotplt->size; |
| 5523 | htab->sgotplt->size += 4; |
| 5524 | } |
| 5525 | |
| 5526 | /* We also need to make an entry in the .rel.plt section. */ |
| 5527 | htab->srelplt->size += sizeof (Elf32_External_Rel); |
| 5528 | } |
| 5529 | else |
| 5530 | { |
| 5531 | h->plt.offset = (bfd_vma) -1; |
| 5532 | h->needs_plt = 0; |
| 5533 | } |
| 5534 | } |
| 5535 | else |
| 5536 | { |
| 5537 | h->plt.offset = (bfd_vma) -1; |
| 5538 | h->needs_plt = 0; |
| 5539 | } |
| 5540 | |
| 5541 | if (h->got.refcount > 0) |
| 5542 | { |
| 5543 | asection *s; |
| 5544 | bfd_boolean dyn; |
| 5545 | int tls_type = elf32_arm_hash_entry (h)->tls_type; |
| 5546 | int indx; |
| 5547 | |
| 5548 | /* Make sure this symbol is output as a dynamic symbol. |
| 5549 | Undefined weak syms won't yet be marked as dynamic. */ |
| 5550 | if (h->dynindx == -1 |
| 5551 | && !h->forced_local) |
| 5552 | { |
| 5553 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 5554 | return FALSE; |
| 5555 | } |
| 5556 | |
| 5557 | if (!htab->symbian_p) |
| 5558 | { |
| 5559 | s = htab->sgot; |
| 5560 | h->got.offset = s->size; |
| 5561 | |
| 5562 | if (tls_type == GOT_UNKNOWN) |
| 5563 | abort (); |
| 5564 | |
| 5565 | if (tls_type == GOT_NORMAL) |
| 5566 | /* Non-TLS symbols need one GOT slot. */ |
| 5567 | s->size += 4; |
| 5568 | else |
| 5569 | { |
| 5570 | if (tls_type & GOT_TLS_GD) |
| 5571 | /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */ |
| 5572 | s->size += 8; |
| 5573 | if (tls_type & GOT_TLS_IE) |
| 5574 | /* R_ARM_TLS_IE32 needs one GOT slot. */ |
| 5575 | s->size += 4; |
| 5576 | } |
| 5577 | |
| 5578 | dyn = htab->root.dynamic_sections_created; |
| 5579 | |
| 5580 | indx = 0; |
| 5581 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 5582 | && (!info->shared |
| 5583 | || !SYMBOL_REFERENCES_LOCAL (info, h))) |
| 5584 | indx = h->dynindx; |
| 5585 | |
| 5586 | if (tls_type != GOT_NORMAL |
| 5587 | && (info->shared || indx != 0) |
| 5588 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 5589 | || h->root.type != bfd_link_hash_undefweak)) |
| 5590 | { |
| 5591 | if (tls_type & GOT_TLS_IE) |
| 5592 | htab->srelgot->size += sizeof (Elf32_External_Rel); |
| 5593 | |
| 5594 | if (tls_type & GOT_TLS_GD) |
| 5595 | htab->srelgot->size += sizeof (Elf32_External_Rel); |
| 5596 | |
| 5597 | if ((tls_type & GOT_TLS_GD) && indx != 0) |
| 5598 | htab->srelgot->size += sizeof (Elf32_External_Rel); |
| 5599 | } |
| 5600 | else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 5601 | || h->root.type != bfd_link_hash_undefweak) |
| 5602 | && (info->shared |
| 5603 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
| 5604 | htab->srelgot->size += sizeof (Elf32_External_Rel); |
| 5605 | } |
| 5606 | } |
| 5607 | else |
| 5608 | h->got.offset = (bfd_vma) -1; |
| 5609 | |
| 5610 | if (eh->relocs_copied == NULL) |
| 5611 | return TRUE; |
| 5612 | |
| 5613 | /* In the shared -Bsymbolic case, discard space allocated for |
| 5614 | dynamic pc-relative relocs against symbols which turn out to be |
| 5615 | defined in regular objects. For the normal shared case, discard |
| 5616 | space for pc-relative relocs that have become local due to symbol |
| 5617 | visibility changes. */ |
| 5618 | |
| 5619 | if (info->shared || htab->root.is_relocatable_executable) |
| 5620 | { |
| 5621 | /* The only reloc that uses pc_count is R_ARM_REL32, which will |
| 5622 | appear on something like ".long foo - .". We want calls to |
| 5623 | protected symbols to resolve directly to the function rather |
| 5624 | than going via the plt. If people want function pointer |
| 5625 | comparisons to work as expected then they should avoid |
| 5626 | writing assembly like ".long foo - .". */ |
| 5627 | if (SYMBOL_CALLS_LOCAL (info, h)) |
| 5628 | { |
| 5629 | struct elf32_arm_relocs_copied **pp; |
| 5630 | |
| 5631 | for (pp = &eh->relocs_copied; (p = *pp) != NULL; ) |
| 5632 | { |
| 5633 | p->count -= p->pc_count; |
| 5634 | p->pc_count = 0; |
| 5635 | if (p->count == 0) |
| 5636 | *pp = p->next; |
| 5637 | else |
| 5638 | pp = &p->next; |
| 5639 | } |
| 5640 | } |
| 5641 | |
| 5642 | /* Also discard relocs on undefined weak syms with non-default |
| 5643 | visibility. */ |
| 5644 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 5645 | && h->root.type == bfd_link_hash_undefweak) |
| 5646 | eh->relocs_copied = NULL; |
| 5647 | else if (htab->root.is_relocatable_executable && h->dynindx == -1 |
| 5648 | && h->root.type == bfd_link_hash_new) |
| 5649 | { |
| 5650 | /* Output absolute symbols so that we can create relocations |
| 5651 | against them. For normal symbols we output a relocation |
| 5652 | against the section that contains them. */ |
| 5653 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 5654 | return FALSE; |
| 5655 | } |
| 5656 | |
| 5657 | } |
| 5658 | else |
| 5659 | { |
| 5660 | /* For the non-shared case, discard space for relocs against |
| 5661 | symbols which turn out to need copy relocs or are not |
| 5662 | dynamic. */ |
| 5663 | |
| 5664 | if (!h->non_got_ref |
| 5665 | && ((h->def_dynamic |
| 5666 | && !h->def_regular) |
| 5667 | || (htab->root.dynamic_sections_created |
| 5668 | && (h->root.type == bfd_link_hash_undefweak |
| 5669 | || h->root.type == bfd_link_hash_undefined)))) |
| 5670 | { |
| 5671 | /* Make sure this symbol is output as a dynamic symbol. |
| 5672 | Undefined weak syms won't yet be marked as dynamic. */ |
| 5673 | if (h->dynindx == -1 |
| 5674 | && !h->forced_local) |
| 5675 | { |
| 5676 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 5677 | return FALSE; |
| 5678 | } |
| 5679 | |
| 5680 | /* If that succeeded, we know we'll be keeping all the |
| 5681 | relocs. */ |
| 5682 | if (h->dynindx != -1) |
| 5683 | goto keep; |
| 5684 | } |
| 5685 | |
| 5686 | eh->relocs_copied = NULL; |
| 5687 | |
| 5688 | keep: ; |
| 5689 | } |
| 5690 | |
| 5691 | /* Finally, allocate space. */ |
| 5692 | for (p = eh->relocs_copied; p != NULL; p = p->next) |
| 5693 | { |
| 5694 | asection *sreloc = elf_section_data (p->section)->sreloc; |
| 5695 | sreloc->size += p->count * sizeof (Elf32_External_Rel); |
| 5696 | } |
| 5697 | |
| 5698 | return TRUE; |
| 5699 | } |
| 5700 | |
| 5701 | /* Find any dynamic relocs that apply to read-only sections. */ |
| 5702 | |
| 5703 | static bfd_boolean |
| 5704 | elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf) |
| 5705 | { |
| 5706 | struct elf32_arm_link_hash_entry *eh; |
| 5707 | struct elf32_arm_relocs_copied *p; |
| 5708 | |
| 5709 | if (h->root.type == bfd_link_hash_warning) |
| 5710 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5711 | |
| 5712 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 5713 | for (p = eh->relocs_copied; p != NULL; p = p->next) |
| 5714 | { |
| 5715 | asection *s = p->section; |
| 5716 | |
| 5717 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 5718 | { |
| 5719 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| 5720 | |
| 5721 | info->flags |= DF_TEXTREL; |
| 5722 | |
| 5723 | /* Not an error, just cut short the traversal. */ |
| 5724 | return FALSE; |
| 5725 | } |
| 5726 | } |
| 5727 | return TRUE; |
| 5728 | } |
| 5729 | |
| 5730 | /* Set the sizes of the dynamic sections. */ |
| 5731 | |
| 5732 | static bfd_boolean |
| 5733 | elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, |
| 5734 | struct bfd_link_info * info) |
| 5735 | { |
| 5736 | bfd * dynobj; |
| 5737 | asection * s; |
| 5738 | bfd_boolean plt; |
| 5739 | bfd_boolean relocs; |
| 5740 | bfd *ibfd; |
| 5741 | struct elf32_arm_link_hash_table *htab; |
| 5742 | |
| 5743 | htab = elf32_arm_hash_table (info); |
| 5744 | dynobj = elf_hash_table (info)->dynobj; |
| 5745 | BFD_ASSERT (dynobj != NULL); |
| 5746 | |
| 5747 | if (elf_hash_table (info)->dynamic_sections_created) |
| 5748 | { |
| 5749 | /* Set the contents of the .interp section to the interpreter. */ |
| 5750 | if (info->executable) |
| 5751 | { |
| 5752 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 5753 | BFD_ASSERT (s != NULL); |
| 5754 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 5755 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 5756 | } |
| 5757 | } |
| 5758 | |
| 5759 | /* Set up .got offsets for local syms, and space for local dynamic |
| 5760 | relocs. */ |
| 5761 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 5762 | { |
| 5763 | bfd_signed_vma *local_got; |
| 5764 | bfd_signed_vma *end_local_got; |
| 5765 | char *local_tls_type; |
| 5766 | bfd_size_type locsymcount; |
| 5767 | Elf_Internal_Shdr *symtab_hdr; |
| 5768 | asection *srel; |
| 5769 | |
| 5770 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
| 5771 | continue; |
| 5772 | |
| 5773 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 5774 | { |
| 5775 | struct elf32_arm_relocs_copied *p; |
| 5776 | |
| 5777 | for (p = *((struct elf32_arm_relocs_copied **) |
| 5778 | &elf_section_data (s)->local_dynrel); |
| 5779 | p != NULL; |
| 5780 | p = p->next) |
| 5781 | { |
| 5782 | if (!bfd_is_abs_section (p->section) |
| 5783 | && bfd_is_abs_section (p->section->output_section)) |
| 5784 | { |
| 5785 | /* Input section has been discarded, either because |
| 5786 | it is a copy of a linkonce section or due to |
| 5787 | linker script /DISCARD/, so we'll be discarding |
| 5788 | the relocs too. */ |
| 5789 | } |
| 5790 | else if (p->count != 0) |
| 5791 | { |
| 5792 | srel = elf_section_data (p->section)->sreloc; |
| 5793 | srel->size += p->count * sizeof (Elf32_External_Rel); |
| 5794 | if ((p->section->output_section->flags & SEC_READONLY) != 0) |
| 5795 | info->flags |= DF_TEXTREL; |
| 5796 | } |
| 5797 | } |
| 5798 | } |
| 5799 | |
| 5800 | local_got = elf_local_got_refcounts (ibfd); |
| 5801 | if (!local_got) |
| 5802 | continue; |
| 5803 | |
| 5804 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 5805 | locsymcount = symtab_hdr->sh_info; |
| 5806 | end_local_got = local_got + locsymcount; |
| 5807 | local_tls_type = elf32_arm_local_got_tls_type (ibfd); |
| 5808 | s = htab->sgot; |
| 5809 | srel = htab->srelgot; |
| 5810 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
| 5811 | { |
| 5812 | if (*local_got > 0) |
| 5813 | { |
| 5814 | *local_got = s->size; |
| 5815 | if (*local_tls_type & GOT_TLS_GD) |
| 5816 | /* TLS_GD relocs need an 8-byte structure in the GOT. */ |
| 5817 | s->size += 8; |
| 5818 | if (*local_tls_type & GOT_TLS_IE) |
| 5819 | s->size += 4; |
| 5820 | if (*local_tls_type == GOT_NORMAL) |
| 5821 | s->size += 4; |
| 5822 | |
| 5823 | if (info->shared || *local_tls_type == GOT_TLS_GD) |
| 5824 | srel->size += sizeof (Elf32_External_Rel); |
| 5825 | } |
| 5826 | else |
| 5827 | *local_got = (bfd_vma) -1; |
| 5828 | } |
| 5829 | } |
| 5830 | |
| 5831 | if (htab->tls_ldm_got.refcount > 0) |
| 5832 | { |
| 5833 | /* Allocate two GOT entries and one dynamic relocation (if necessary) |
| 5834 | for R_ARM_TLS_LDM32 relocations. */ |
| 5835 | htab->tls_ldm_got.offset = htab->sgot->size; |
| 5836 | htab->sgot->size += 8; |
| 5837 | if (info->shared) |
| 5838 | htab->srelgot->size += sizeof (Elf32_External_Rel); |
| 5839 | } |
| 5840 | else |
| 5841 | htab->tls_ldm_got.offset = -1; |
| 5842 | |
| 5843 | /* Allocate global sym .plt and .got entries, and space for global |
| 5844 | sym dynamic relocs. */ |
| 5845 | elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info); |
| 5846 | |
| 5847 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 5848 | determined the sizes of the various dynamic sections. Allocate |
| 5849 | memory for them. */ |
| 5850 | plt = FALSE; |
| 5851 | relocs = FALSE; |
| 5852 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 5853 | { |
| 5854 | const char * name; |
| 5855 | |
| 5856 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 5857 | continue; |
| 5858 | |
| 5859 | /* It's OK to base decisions on the section name, because none |
| 5860 | of the dynobj section names depend upon the input files. */ |
| 5861 | name = bfd_get_section_name (dynobj, s); |
| 5862 | |
| 5863 | if (strcmp (name, ".plt") == 0) |
| 5864 | { |
| 5865 | /* Remember whether there is a PLT. */ |
| 5866 | plt = s->size != 0; |
| 5867 | } |
| 5868 | else if (strncmp (name, ".rel", 4) == 0) |
| 5869 | { |
| 5870 | if (s->size != 0) |
| 5871 | { |
| 5872 | /* Remember whether there are any reloc sections other |
| 5873 | than .rel.plt. */ |
| 5874 | if (strcmp (name, ".rel.plt") != 0) |
| 5875 | relocs = TRUE; |
| 5876 | |
| 5877 | /* We use the reloc_count field as a counter if we need |
| 5878 | to copy relocs into the output file. */ |
| 5879 | s->reloc_count = 0; |
| 5880 | } |
| 5881 | } |
| 5882 | else if (strncmp (name, ".got", 4) != 0 |
| 5883 | && strcmp (name, ".dynbss") != 0) |
| 5884 | { |
| 5885 | /* It's not one of our sections, so don't allocate space. */ |
| 5886 | continue; |
| 5887 | } |
| 5888 | |
| 5889 | if (s->size == 0) |
| 5890 | { |
| 5891 | /* If we don't need this section, strip it from the |
| 5892 | output file. This is mostly to handle .rel.bss and |
| 5893 | .rel.plt. We must create both sections in |
| 5894 | create_dynamic_sections, because they must be created |
| 5895 | before the linker maps input sections to output |
| 5896 | sections. The linker does that before |
| 5897 | adjust_dynamic_symbol is called, and it is that |
| 5898 | function which decides whether anything needs to go |
| 5899 | into these sections. */ |
| 5900 | s->flags |= SEC_EXCLUDE; |
| 5901 | continue; |
| 5902 | } |
| 5903 | |
| 5904 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 5905 | continue; |
| 5906 | |
| 5907 | /* Allocate memory for the section contents. */ |
| 5908 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| 5909 | if (s->contents == NULL) |
| 5910 | return FALSE; |
| 5911 | } |
| 5912 | |
| 5913 | if (elf_hash_table (info)->dynamic_sections_created) |
| 5914 | { |
| 5915 | /* Add some entries to the .dynamic section. We fill in the |
| 5916 | values later, in elf32_arm_finish_dynamic_sections, but we |
| 5917 | must add the entries now so that we get the correct size for |
| 5918 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 5919 | dynamic linker and used by the debugger. */ |
| 5920 | #define add_dynamic_entry(TAG, VAL) \ |
| 5921 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 5922 | |
| 5923 | if (info->executable) |
| 5924 | { |
| 5925 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 5926 | return FALSE; |
| 5927 | } |
| 5928 | |
| 5929 | if (plt) |
| 5930 | { |
| 5931 | if ( !add_dynamic_entry (DT_PLTGOT, 0) |
| 5932 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 5933 | || !add_dynamic_entry (DT_PLTREL, DT_REL) |
| 5934 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 5935 | return FALSE; |
| 5936 | } |
| 5937 | |
| 5938 | if (relocs) |
| 5939 | { |
| 5940 | if ( !add_dynamic_entry (DT_REL, 0) |
| 5941 | || !add_dynamic_entry (DT_RELSZ, 0) |
| 5942 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) |
| 5943 | return FALSE; |
| 5944 | } |
| 5945 | |
| 5946 | /* If any dynamic relocs apply to a read-only section, |
| 5947 | then we need a DT_TEXTREL entry. */ |
| 5948 | if ((info->flags & DF_TEXTREL) == 0) |
| 5949 | elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs, |
| 5950 | (PTR) info); |
| 5951 | |
| 5952 | if ((info->flags & DF_TEXTREL) != 0) |
| 5953 | { |
| 5954 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 5955 | return FALSE; |
| 5956 | } |
| 5957 | } |
| 5958 | #undef add_dynamic_entry |
| 5959 | |
| 5960 | return TRUE; |
| 5961 | } |
| 5962 | |
| 5963 | /* Finish up dynamic symbol handling. We set the contents of various |
| 5964 | dynamic sections here. */ |
| 5965 | |
| 5966 | static bfd_boolean |
| 5967 | elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info, |
| 5968 | struct elf_link_hash_entry * h, Elf_Internal_Sym * sym) |
| 5969 | { |
| 5970 | bfd * dynobj; |
| 5971 | struct elf32_arm_link_hash_table *htab; |
| 5972 | struct elf32_arm_link_hash_entry *eh; |
| 5973 | |
| 5974 | dynobj = elf_hash_table (info)->dynobj; |
| 5975 | htab = elf32_arm_hash_table (info); |
| 5976 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 5977 | |
| 5978 | if (h->plt.offset != (bfd_vma) -1) |
| 5979 | { |
| 5980 | asection * splt; |
| 5981 | asection * srel; |
| 5982 | bfd_byte *loc; |
| 5983 | bfd_vma plt_index; |
| 5984 | Elf_Internal_Rela rel; |
| 5985 | |
| 5986 | /* This symbol has an entry in the procedure linkage table. Set |
| 5987 | it up. */ |
| 5988 | |
| 5989 | BFD_ASSERT (h->dynindx != -1); |
| 5990 | |
| 5991 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 5992 | srel = bfd_get_section_by_name (dynobj, ".rel.plt"); |
| 5993 | BFD_ASSERT (splt != NULL && srel != NULL); |
| 5994 | |
| 5995 | /* Fill in the entry in the procedure linkage table. */ |
| 5996 | if (htab->symbian_p) |
| 5997 | { |
| 5998 | unsigned i; |
| 5999 | for (i = 0; i < htab->plt_entry_size / 4; ++i) |
| 6000 | bfd_put_32 (output_bfd, |
| 6001 | elf32_arm_symbian_plt_entry[i], |
| 6002 | splt->contents + h->plt.offset + 4 * i); |
| 6003 | |
| 6004 | /* Fill in the entry in the .rel.plt section. */ |
| 6005 | rel.r_offset = (splt->output_section->vma |
| 6006 | + splt->output_offset |
| 6007 | + h->plt.offset + 4 * (i - 1)); |
| 6008 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT); |
| 6009 | |
| 6010 | /* Get the index in the procedure linkage table which |
| 6011 | corresponds to this symbol. This is the index of this symbol |
| 6012 | in all the symbols for which we are making plt entries. The |
| 6013 | first entry in the procedure linkage table is reserved. */ |
| 6014 | plt_index = ((h->plt.offset - htab->plt_header_size) |
| 6015 | / htab->plt_entry_size); |
| 6016 | } |
| 6017 | else |
| 6018 | { |
| 6019 | bfd_vma got_offset; |
| 6020 | bfd_vma got_displacement; |
| 6021 | asection * sgot; |
| 6022 | |
| 6023 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 6024 | BFD_ASSERT (sgot != NULL); |
| 6025 | |
| 6026 | /* Get the offset into the .got.plt table of the entry that |
| 6027 | corresponds to this function. */ |
| 6028 | got_offset = eh->plt_got_offset; |
| 6029 | |
| 6030 | /* Get the index in the procedure linkage table which |
| 6031 | corresponds to this symbol. This is the index of this symbol |
| 6032 | in all the symbols for which we are making plt entries. The |
| 6033 | first three entries in .got.plt are reserved; after that |
| 6034 | symbols appear in the same order as in .plt. */ |
| 6035 | plt_index = (got_offset - 12) / 4; |
| 6036 | |
| 6037 | /* Calculate the displacement between the PLT slot and the |
| 6038 | entry in the GOT. The eight-byte offset accounts for the |
| 6039 | value produced by adding to pc in the first instruction |
| 6040 | of the PLT stub. */ |
| 6041 | got_displacement = (sgot->output_section->vma |
| 6042 | + sgot->output_offset |
| 6043 | + got_offset |
| 6044 | - splt->output_section->vma |
| 6045 | - splt->output_offset |
| 6046 | - h->plt.offset |
| 6047 | - 8); |
| 6048 | |
| 6049 | BFD_ASSERT ((got_displacement & 0xf0000000) == 0); |
| 6050 | |
| 6051 | if (!htab->use_blx && eh->plt_thumb_refcount > 0) |
| 6052 | { |
| 6053 | bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[0], |
| 6054 | splt->contents + h->plt.offset - 4); |
| 6055 | bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[1], |
| 6056 | splt->contents + h->plt.offset - 2); |
| 6057 | } |
| 6058 | |
| 6059 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20), |
| 6060 | splt->contents + h->plt.offset + 0); |
| 6061 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12), |
| 6062 | splt->contents + h->plt.offset + 4); |
| 6063 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff), |
| 6064 | splt->contents + h->plt.offset + 8); |
| 6065 | #ifdef FOUR_WORD_PLT |
| 6066 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], |
| 6067 | splt->contents + h->plt.offset + 12); |
| 6068 | #endif |
| 6069 | |
| 6070 | /* Fill in the entry in the global offset table. */ |
| 6071 | bfd_put_32 (output_bfd, |
| 6072 | (splt->output_section->vma |
| 6073 | + splt->output_offset), |
| 6074 | sgot->contents + got_offset); |
| 6075 | |
| 6076 | /* Fill in the entry in the .rel.plt section. */ |
| 6077 | rel.r_offset = (sgot->output_section->vma |
| 6078 | + sgot->output_offset |
| 6079 | + got_offset); |
| 6080 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT); |
| 6081 | } |
| 6082 | |
| 6083 | loc = srel->contents + plt_index * sizeof (Elf32_External_Rel); |
| 6084 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
| 6085 | |
| 6086 | if (!h->def_regular) |
| 6087 | { |
| 6088 | /* Mark the symbol as undefined, rather than as defined in |
| 6089 | the .plt section. Leave the value alone. */ |
| 6090 | sym->st_shndx = SHN_UNDEF; |
| 6091 | /* If the symbol is weak, we do need to clear the value. |
| 6092 | Otherwise, the PLT entry would provide a definition for |
| 6093 | the symbol even if the symbol wasn't defined anywhere, |
| 6094 | and so the symbol would never be NULL. */ |
| 6095 | if (!h->ref_regular_nonweak) |
| 6096 | sym->st_value = 0; |
| 6097 | } |
| 6098 | } |
| 6099 | |
| 6100 | if (h->got.offset != (bfd_vma) -1 |
| 6101 | && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0 |
| 6102 | && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0) |
| 6103 | { |
| 6104 | asection * sgot; |
| 6105 | asection * srel; |
| 6106 | Elf_Internal_Rela rel; |
| 6107 | bfd_byte *loc; |
| 6108 | |
| 6109 | /* This symbol has an entry in the global offset table. Set it |
| 6110 | up. */ |
| 6111 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 6112 | srel = bfd_get_section_by_name (dynobj, ".rel.got"); |
| 6113 | BFD_ASSERT (sgot != NULL && srel != NULL); |
| 6114 | |
| 6115 | rel.r_offset = (sgot->output_section->vma |
| 6116 | + sgot->output_offset |
| 6117 | + (h->got.offset &~ (bfd_vma) 1)); |
| 6118 | |
| 6119 | /* If this is a static link, or it is a -Bsymbolic link and the |
| 6120 | symbol is defined locally or was forced to be local because |
| 6121 | of a version file, we just want to emit a RELATIVE reloc. |
| 6122 | The entry in the global offset table will already have been |
| 6123 | initialized in the relocate_section function. */ |
| 6124 | if (info->shared |
| 6125 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 6126 | { |
| 6127 | BFD_ASSERT((h->got.offset & 1) != 0); |
| 6128 | rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); |
| 6129 | } |
| 6130 | else |
| 6131 | { |
| 6132 | BFD_ASSERT((h->got.offset & 1) == 0); |
| 6133 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); |
| 6134 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT); |
| 6135 | } |
| 6136 | |
| 6137 | loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel); |
| 6138 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
| 6139 | } |
| 6140 | |
| 6141 | if (h->needs_copy) |
| 6142 | { |
| 6143 | asection * s; |
| 6144 | Elf_Internal_Rela rel; |
| 6145 | bfd_byte *loc; |
| 6146 | |
| 6147 | /* This symbol needs a copy reloc. Set it up. */ |
| 6148 | BFD_ASSERT (h->dynindx != -1 |
| 6149 | && (h->root.type == bfd_link_hash_defined |
| 6150 | || h->root.type == bfd_link_hash_defweak)); |
| 6151 | |
| 6152 | s = bfd_get_section_by_name (h->root.u.def.section->owner, |
| 6153 | ".rel.bss"); |
| 6154 | BFD_ASSERT (s != NULL); |
| 6155 | |
| 6156 | rel.r_offset = (h->root.u.def.value |
| 6157 | + h->root.u.def.section->output_section->vma |
| 6158 | + h->root.u.def.section->output_offset); |
| 6159 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY); |
| 6160 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel); |
| 6161 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
| 6162 | } |
| 6163 | |
| 6164 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 6165 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 6166 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 6167 | sym->st_shndx = SHN_ABS; |
| 6168 | |
| 6169 | return TRUE; |
| 6170 | } |
| 6171 | |
| 6172 | /* Finish up the dynamic sections. */ |
| 6173 | |
| 6174 | static bfd_boolean |
| 6175 | elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info) |
| 6176 | { |
| 6177 | bfd * dynobj; |
| 6178 | asection * sgot; |
| 6179 | asection * sdyn; |
| 6180 | |
| 6181 | dynobj = elf_hash_table (info)->dynobj; |
| 6182 | |
| 6183 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 6184 | BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL); |
| 6185 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 6186 | |
| 6187 | if (elf_hash_table (info)->dynamic_sections_created) |
| 6188 | { |
| 6189 | asection *splt; |
| 6190 | Elf32_External_Dyn *dyncon, *dynconend; |
| 6191 | struct elf32_arm_link_hash_table *htab; |
| 6192 | |
| 6193 | htab = elf32_arm_hash_table (info); |
| 6194 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 6195 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
| 6196 | |
| 6197 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 6198 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 6199 | |
| 6200 | for (; dyncon < dynconend; dyncon++) |
| 6201 | { |
| 6202 | Elf_Internal_Dyn dyn; |
| 6203 | const char * name; |
| 6204 | asection * s; |
| 6205 | |
| 6206 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 6207 | |
| 6208 | switch (dyn.d_tag) |
| 6209 | { |
| 6210 | unsigned int type; |
| 6211 | |
| 6212 | default: |
| 6213 | break; |
| 6214 | |
| 6215 | case DT_HASH: |
| 6216 | name = ".hash"; |
| 6217 | goto get_vma_if_bpabi; |
| 6218 | case DT_STRTAB: |
| 6219 | name = ".dynstr"; |
| 6220 | goto get_vma_if_bpabi; |
| 6221 | case DT_SYMTAB: |
| 6222 | name = ".dynsym"; |
| 6223 | goto get_vma_if_bpabi; |
| 6224 | case DT_VERSYM: |
| 6225 | name = ".gnu.version"; |
| 6226 | goto get_vma_if_bpabi; |
| 6227 | case DT_VERDEF: |
| 6228 | name = ".gnu.version_d"; |
| 6229 | goto get_vma_if_bpabi; |
| 6230 | case DT_VERNEED: |
| 6231 | name = ".gnu.version_r"; |
| 6232 | goto get_vma_if_bpabi; |
| 6233 | |
| 6234 | case DT_PLTGOT: |
| 6235 | name = ".got"; |
| 6236 | goto get_vma; |
| 6237 | case DT_JMPREL: |
| 6238 | name = ".rel.plt"; |
| 6239 | get_vma: |
| 6240 | s = bfd_get_section_by_name (output_bfd, name); |
| 6241 | BFD_ASSERT (s != NULL); |
| 6242 | if (!htab->symbian_p) |
| 6243 | dyn.d_un.d_ptr = s->vma; |
| 6244 | else |
| 6245 | /* In the BPABI, tags in the PT_DYNAMIC section point |
| 6246 | at the file offset, not the memory address, for the |
| 6247 | convenience of the post linker. */ |
| 6248 | dyn.d_un.d_ptr = s->filepos; |
| 6249 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6250 | break; |
| 6251 | |
| 6252 | get_vma_if_bpabi: |
| 6253 | if (htab->symbian_p) |
| 6254 | goto get_vma; |
| 6255 | break; |
| 6256 | |
| 6257 | case DT_PLTRELSZ: |
| 6258 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); |
| 6259 | BFD_ASSERT (s != NULL); |
| 6260 | dyn.d_un.d_val = s->size; |
| 6261 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6262 | break; |
| 6263 | |
| 6264 | case DT_RELSZ: |
| 6265 | if (!htab->symbian_p) |
| 6266 | { |
| 6267 | /* My reading of the SVR4 ABI indicates that the |
| 6268 | procedure linkage table relocs (DT_JMPREL) should be |
| 6269 | included in the overall relocs (DT_REL). This is |
| 6270 | what Solaris does. However, UnixWare can not handle |
| 6271 | that case. Therefore, we override the DT_RELSZ entry |
| 6272 | here to make it not include the JMPREL relocs. Since |
| 6273 | the linker script arranges for .rel.plt to follow all |
| 6274 | other relocation sections, we don't have to worry |
| 6275 | about changing the DT_REL entry. */ |
| 6276 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); |
| 6277 | if (s != NULL) |
| 6278 | dyn.d_un.d_val -= s->size; |
| 6279 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6280 | break; |
| 6281 | } |
| 6282 | /* Fall through */ |
| 6283 | |
| 6284 | case DT_REL: |
| 6285 | case DT_RELA: |
| 6286 | case DT_RELASZ: |
| 6287 | /* In the BPABI, the DT_REL tag must point at the file |
| 6288 | offset, not the VMA, of the first relocation |
| 6289 | section. So, we use code similar to that in |
| 6290 | elflink.c, but do not check for SHF_ALLOC on the |
| 6291 | relcoation section, since relocations sections are |
| 6292 | never allocated under the BPABI. The comments above |
| 6293 | about Unixware notwithstanding, we include all of the |
| 6294 | relocations here. */ |
| 6295 | if (htab->symbian_p) |
| 6296 | { |
| 6297 | unsigned int i; |
| 6298 | type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) |
| 6299 | ? SHT_REL : SHT_RELA); |
| 6300 | dyn.d_un.d_val = 0; |
| 6301 | for (i = 1; i < elf_numsections (output_bfd); i++) |
| 6302 | { |
| 6303 | Elf_Internal_Shdr *hdr |
| 6304 | = elf_elfsections (output_bfd)[i]; |
| 6305 | if (hdr->sh_type == type) |
| 6306 | { |
| 6307 | if (dyn.d_tag == DT_RELSZ |
| 6308 | || dyn.d_tag == DT_RELASZ) |
| 6309 | dyn.d_un.d_val += hdr->sh_size; |
| 6310 | else if ((ufile_ptr) hdr->sh_offset |
| 6311 | <= dyn.d_un.d_val - 1) |
| 6312 | dyn.d_un.d_val = hdr->sh_offset; |
| 6313 | } |
| 6314 | } |
| 6315 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6316 | } |
| 6317 | break; |
| 6318 | |
| 6319 | /* Set the bottom bit of DT_INIT/FINI if the |
| 6320 | corresponding function is Thumb. */ |
| 6321 | case DT_INIT: |
| 6322 | name = info->init_function; |
| 6323 | goto get_sym; |
| 6324 | case DT_FINI: |
| 6325 | name = info->fini_function; |
| 6326 | get_sym: |
| 6327 | /* If it wasn't set by elf_bfd_final_link |
| 6328 | then there is nothing to adjust. */ |
| 6329 | if (dyn.d_un.d_val != 0) |
| 6330 | { |
| 6331 | struct elf_link_hash_entry * eh; |
| 6332 | |
| 6333 | eh = elf_link_hash_lookup (elf_hash_table (info), name, |
| 6334 | FALSE, FALSE, TRUE); |
| 6335 | if (eh != (struct elf_link_hash_entry *) NULL |
| 6336 | && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC) |
| 6337 | { |
| 6338 | dyn.d_un.d_val |= 1; |
| 6339 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6340 | } |
| 6341 | } |
| 6342 | break; |
| 6343 | } |
| 6344 | } |
| 6345 | |
| 6346 | /* Fill in the first entry in the procedure linkage table. */ |
| 6347 | if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size) |
| 6348 | { |
| 6349 | bfd_vma got_displacement; |
| 6350 | |
| 6351 | /* Calculate the displacement between the PLT slot and &GOT[0]. */ |
| 6352 | got_displacement = (sgot->output_section->vma |
| 6353 | + sgot->output_offset |
| 6354 | - splt->output_section->vma |
| 6355 | - splt->output_offset |
| 6356 | - 16); |
| 6357 | |
| 6358 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0); |
| 6359 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4); |
| 6360 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8); |
| 6361 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12); |
| 6362 | #ifdef FOUR_WORD_PLT |
| 6363 | /* The displacement value goes in the otherwise-unused last word of |
| 6364 | the second entry. */ |
| 6365 | bfd_put_32 (output_bfd, got_displacement, splt->contents + 28); |
| 6366 | #else |
| 6367 | bfd_put_32 (output_bfd, got_displacement, splt->contents + 16); |
| 6368 | #endif |
| 6369 | } |
| 6370 | |
| 6371 | /* UnixWare sets the entsize of .plt to 4, although that doesn't |
| 6372 | really seem like the right value. */ |
| 6373 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; |
| 6374 | } |
| 6375 | |
| 6376 | /* Fill in the first three entries in the global offset table. */ |
| 6377 | if (sgot) |
| 6378 | { |
| 6379 | if (sgot->size > 0) |
| 6380 | { |
| 6381 | if (sdyn == NULL) |
| 6382 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
| 6383 | else |
| 6384 | bfd_put_32 (output_bfd, |
| 6385 | sdyn->output_section->vma + sdyn->output_offset, |
| 6386 | sgot->contents); |
| 6387 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); |
| 6388 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); |
| 6389 | } |
| 6390 | |
| 6391 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| 6392 | } |
| 6393 | |
| 6394 | return TRUE; |
| 6395 | } |
| 6396 | |
| 6397 | static void |
| 6398 | elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED) |
| 6399 | { |
| 6400 | Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */ |
| 6401 | struct elf32_arm_link_hash_table *globals; |
| 6402 | |
| 6403 | i_ehdrp = elf_elfheader (abfd); |
| 6404 | |
| 6405 | if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN) |
| 6406 | i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM; |
| 6407 | else |
| 6408 | i_ehdrp->e_ident[EI_OSABI] = 0; |
| 6409 | i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION; |
| 6410 | |
| 6411 | if (link_info) |
| 6412 | { |
| 6413 | globals = elf32_arm_hash_table (link_info); |
| 6414 | if (globals->byteswap_code) |
| 6415 | i_ehdrp->e_flags |= EF_ARM_BE8; |
| 6416 | } |
| 6417 | } |
| 6418 | |
| 6419 | static enum elf_reloc_type_class |
| 6420 | elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela) |
| 6421 | { |
| 6422 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 6423 | { |
| 6424 | case R_ARM_RELATIVE: |
| 6425 | return reloc_class_relative; |
| 6426 | case R_ARM_JUMP_SLOT: |
| 6427 | return reloc_class_plt; |
| 6428 | case R_ARM_COPY: |
| 6429 | return reloc_class_copy; |
| 6430 | default: |
| 6431 | return reloc_class_normal; |
| 6432 | } |
| 6433 | } |
| 6434 | |
| 6435 | /* Set the right machine number for an Arm ELF file. */ |
| 6436 | |
| 6437 | static bfd_boolean |
| 6438 | elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr) |
| 6439 | { |
| 6440 | if (hdr->sh_type == SHT_NOTE) |
| 6441 | *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS; |
| 6442 | |
| 6443 | return TRUE; |
| 6444 | } |
| 6445 | |
| 6446 | static void |
| 6447 | elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) |
| 6448 | { |
| 6449 | bfd_arm_update_notes (abfd, ARM_NOTE_SECTION); |
| 6450 | } |
| 6451 | |
| 6452 | /* Return TRUE if this is an unwinding table entry. */ |
| 6453 | |
| 6454 | static bfd_boolean |
| 6455 | is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name) |
| 6456 | { |
| 6457 | size_t len1, len2; |
| 6458 | |
| 6459 | len1 = sizeof (ELF_STRING_ARM_unwind) - 1; |
| 6460 | len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1; |
| 6461 | return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0 |
| 6462 | || strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0); |
| 6463 | } |
| 6464 | |
| 6465 | |
| 6466 | /* Set the type and flags for an ARM section. We do this by |
| 6467 | the section name, which is a hack, but ought to work. */ |
| 6468 | |
| 6469 | static bfd_boolean |
| 6470 | elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec) |
| 6471 | { |
| 6472 | const char * name; |
| 6473 | |
| 6474 | name = bfd_get_section_name (abfd, sec); |
| 6475 | |
| 6476 | if (is_arm_elf_unwind_section_name (abfd, name)) |
| 6477 | { |
| 6478 | hdr->sh_type = SHT_ARM_EXIDX; |
| 6479 | hdr->sh_flags |= SHF_LINK_ORDER; |
| 6480 | } |
| 6481 | return TRUE; |
| 6482 | } |
| 6483 | |
| 6484 | /* Handle an ARM specific section when reading an object file. This is |
| 6485 | called when bfd_section_from_shdr finds a section with an unknown |
| 6486 | type. */ |
| 6487 | |
| 6488 | static bfd_boolean |
| 6489 | elf32_arm_section_from_shdr (bfd *abfd, |
| 6490 | Elf_Internal_Shdr * hdr, |
| 6491 | const char *name, |
| 6492 | int shindex) |
| 6493 | { |
| 6494 | /* There ought to be a place to keep ELF backend specific flags, but |
| 6495 | at the moment there isn't one. We just keep track of the |
| 6496 | sections by their name, instead. Fortunately, the ABI gives |
| 6497 | names for all the ARM specific sections, so we will probably get |
| 6498 | away with this. */ |
| 6499 | switch (hdr->sh_type) |
| 6500 | { |
| 6501 | case SHT_ARM_EXIDX: |
| 6502 | break; |
| 6503 | |
| 6504 | default: |
| 6505 | return FALSE; |
| 6506 | } |
| 6507 | |
| 6508 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
| 6509 | return FALSE; |
| 6510 | |
| 6511 | return TRUE; |
| 6512 | } |
| 6513 | |
| 6514 | /* Called for each symbol. Builds a section map based on mapping symbols. |
| 6515 | Does not alter any of the symbols. */ |
| 6516 | |
| 6517 | static bfd_boolean |
| 6518 | elf32_arm_output_symbol_hook (struct bfd_link_info *info, |
| 6519 | const char *name, |
| 6520 | Elf_Internal_Sym *elfsym, |
| 6521 | asection *input_sec, |
| 6522 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED) |
| 6523 | { |
| 6524 | int mapcount; |
| 6525 | elf32_arm_section_map *map; |
| 6526 | struct elf32_arm_link_hash_table *globals; |
| 6527 | |
| 6528 | /* Only do this on final link. */ |
| 6529 | if (info->relocatable) |
| 6530 | return TRUE; |
| 6531 | |
| 6532 | /* Only build a map if we need to byteswap code. */ |
| 6533 | globals = elf32_arm_hash_table (info); |
| 6534 | if (!globals->byteswap_code) |
| 6535 | return TRUE; |
| 6536 | |
| 6537 | /* We only want mapping symbols. */ |
| 6538 | if (! bfd_is_arm_mapping_symbol_name (name)) |
| 6539 | return TRUE; |
| 6540 | |
| 6541 | mapcount = ++(elf32_arm_section_data (input_sec)->mapcount); |
| 6542 | map = elf32_arm_section_data (input_sec)->map; |
| 6543 | /* TODO: This may be inefficient, but we probably don't usually have many |
| 6544 | mapping symbols per section. */ |
| 6545 | map = bfd_realloc (map, mapcount * sizeof (elf32_arm_section_map)); |
| 6546 | elf32_arm_section_data (input_sec)->map = map; |
| 6547 | |
| 6548 | map[mapcount - 1].vma = elfsym->st_value; |
| 6549 | map[mapcount - 1].type = name[1]; |
| 6550 | return TRUE; |
| 6551 | } |
| 6552 | |
| 6553 | |
| 6554 | /* Allocate target specific section data. */ |
| 6555 | |
| 6556 | static bfd_boolean |
| 6557 | elf32_arm_new_section_hook (bfd *abfd, asection *sec) |
| 6558 | { |
| 6559 | struct _arm_elf_section_data *sdata; |
| 6560 | bfd_size_type amt = sizeof (*sdata); |
| 6561 | |
| 6562 | sdata = bfd_zalloc (abfd, amt); |
| 6563 | if (sdata == NULL) |
| 6564 | return FALSE; |
| 6565 | sec->used_by_bfd = sdata; |
| 6566 | |
| 6567 | return _bfd_elf_new_section_hook (abfd, sec); |
| 6568 | } |
| 6569 | |
| 6570 | |
| 6571 | /* Used to order a list of mapping symbols by address. */ |
| 6572 | |
| 6573 | static int |
| 6574 | elf32_arm_compare_mapping (const void * a, const void * b) |
| 6575 | { |
| 6576 | return ((const elf32_arm_section_map *) a)->vma |
| 6577 | > ((const elf32_arm_section_map *) b)->vma; |
| 6578 | } |
| 6579 | |
| 6580 | |
| 6581 | /* Do code byteswapping. Return FALSE afterwards so that the section is |
| 6582 | written out as normal. */ |
| 6583 | |
| 6584 | static bfd_boolean |
| 6585 | elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec, |
| 6586 | bfd_byte *contents) |
| 6587 | { |
| 6588 | int mapcount; |
| 6589 | elf32_arm_section_map *map; |
| 6590 | bfd_vma ptr; |
| 6591 | bfd_vma end; |
| 6592 | bfd_vma offset; |
| 6593 | bfd_byte tmp; |
| 6594 | int i; |
| 6595 | |
| 6596 | mapcount = elf32_arm_section_data (sec)->mapcount; |
| 6597 | map = elf32_arm_section_data (sec)->map; |
| 6598 | |
| 6599 | if (mapcount == 0) |
| 6600 | return FALSE; |
| 6601 | |
| 6602 | qsort (map, mapcount, sizeof (elf32_arm_section_map), |
| 6603 | elf32_arm_compare_mapping); |
| 6604 | |
| 6605 | offset = sec->output_section->vma + sec->output_offset; |
| 6606 | ptr = map[0].vma - offset; |
| 6607 | for (i = 0; i < mapcount; i++) |
| 6608 | { |
| 6609 | if (i == mapcount - 1) |
| 6610 | end = sec->size; |
| 6611 | else |
| 6612 | end = map[i + 1].vma - offset; |
| 6613 | |
| 6614 | switch (map[i].type) |
| 6615 | { |
| 6616 | case 'a': |
| 6617 | /* Byte swap code words. */ |
| 6618 | while (ptr + 3 < end) |
| 6619 | { |
| 6620 | tmp = contents[ptr]; |
| 6621 | contents[ptr] = contents[ptr + 3]; |
| 6622 | contents[ptr + 3] = tmp; |
| 6623 | tmp = contents[ptr + 1]; |
| 6624 | contents[ptr + 1] = contents[ptr + 2]; |
| 6625 | contents[ptr + 2] = tmp; |
| 6626 | ptr += 4; |
| 6627 | } |
| 6628 | break; |
| 6629 | |
| 6630 | case 't': |
| 6631 | /* Byte swap code halfwords. */ |
| 6632 | while (ptr + 1 < end) |
| 6633 | { |
| 6634 | tmp = contents[ptr]; |
| 6635 | contents[ptr] = contents[ptr + 1]; |
| 6636 | contents[ptr + 1] = tmp; |
| 6637 | ptr += 2; |
| 6638 | } |
| 6639 | break; |
| 6640 | |
| 6641 | case 'd': |
| 6642 | /* Leave data alone. */ |
| 6643 | break; |
| 6644 | } |
| 6645 | ptr = end; |
| 6646 | } |
| 6647 | free (map); |
| 6648 | return FALSE; |
| 6649 | } |
| 6650 | |
| 6651 | /* Display STT_ARM_TFUNC symbols as functions. */ |
| 6652 | |
| 6653 | static void |
| 6654 | elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
| 6655 | asymbol *asym) |
| 6656 | { |
| 6657 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; |
| 6658 | |
| 6659 | if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC) |
| 6660 | elfsym->symbol.flags |= BSF_FUNCTION; |
| 6661 | } |
| 6662 | |
| 6663 | |
| 6664 | /* Mangle thumb function symbols as we read them in. */ |
| 6665 | |
| 6666 | static void |
| 6667 | elf32_arm_swap_symbol_in (bfd * abfd, |
| 6668 | const void *psrc, |
| 6669 | const void *pshn, |
| 6670 | Elf_Internal_Sym *dst) |
| 6671 | { |
| 6672 | bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst); |
| 6673 | |
| 6674 | /* New EABI objects mark thumb function symbols by setting the low bit of |
| 6675 | the address. Turn these into STT_ARM_TFUNC. */ |
| 6676 | if (ELF_ST_TYPE (dst->st_info) == STT_FUNC |
| 6677 | && (dst->st_value & 1)) |
| 6678 | { |
| 6679 | dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC); |
| 6680 | dst->st_value &= ~(bfd_vma) 1; |
| 6681 | } |
| 6682 | } |
| 6683 | |
| 6684 | |
| 6685 | /* Mangle thumb function symbols as we write them out. */ |
| 6686 | |
| 6687 | static void |
| 6688 | elf32_arm_swap_symbol_out (bfd *abfd, |
| 6689 | const Elf_Internal_Sym *src, |
| 6690 | void *cdst, |
| 6691 | void *shndx) |
| 6692 | { |
| 6693 | Elf_Internal_Sym newsym; |
| 6694 | |
| 6695 | /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit |
| 6696 | of the address set, as per the new EABI. We do this unconditionally |
| 6697 | because objcopy does not set the elf header flags until after |
| 6698 | it writes out the symbol table. */ |
| 6699 | if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC) |
| 6700 | { |
| 6701 | newsym = *src; |
| 6702 | newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC); |
| 6703 | newsym.st_value |= 1; |
| 6704 | |
| 6705 | src = &newsym; |
| 6706 | } |
| 6707 | bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx); |
| 6708 | } |
| 6709 | |
| 6710 | /* Add the PT_ARM_EXIDX program header. */ |
| 6711 | |
| 6712 | static bfd_boolean |
| 6713 | elf32_arm_modify_segment_map (bfd *abfd, |
| 6714 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 6715 | { |
| 6716 | struct elf_segment_map *m; |
| 6717 | asection *sec; |
| 6718 | |
| 6719 | sec = bfd_get_section_by_name (abfd, ".ARM.exidx"); |
| 6720 | if (sec != NULL && (sec->flags & SEC_LOAD) != 0) |
| 6721 | { |
| 6722 | /* If there is already a PT_ARM_EXIDX header, then we do not |
| 6723 | want to add another one. This situation arises when running |
| 6724 | "strip"; the input binary already has the header. */ |
| 6725 | m = elf_tdata (abfd)->segment_map; |
| 6726 | while (m && m->p_type != PT_ARM_EXIDX) |
| 6727 | m = m->next; |
| 6728 | if (!m) |
| 6729 | { |
| 6730 | m = bfd_zalloc (abfd, sizeof (struct elf_segment_map)); |
| 6731 | if (m == NULL) |
| 6732 | return FALSE; |
| 6733 | m->p_type = PT_ARM_EXIDX; |
| 6734 | m->count = 1; |
| 6735 | m->sections[0] = sec; |
| 6736 | |
| 6737 | m->next = elf_tdata (abfd)->segment_map; |
| 6738 | elf_tdata (abfd)->segment_map = m; |
| 6739 | } |
| 6740 | } |
| 6741 | |
| 6742 | return TRUE; |
| 6743 | } |
| 6744 | |
| 6745 | /* We may add a PT_ARM_EXIDX program header. */ |
| 6746 | |
| 6747 | static int |
| 6748 | elf32_arm_additional_program_headers (bfd *abfd) |
| 6749 | { |
| 6750 | asection *sec; |
| 6751 | |
| 6752 | sec = bfd_get_section_by_name (abfd, ".ARM.exidx"); |
| 6753 | if (sec != NULL && (sec->flags & SEC_LOAD) != 0) |
| 6754 | return 1; |
| 6755 | else |
| 6756 | return 0; |
| 6757 | } |
| 6758 | |
| 6759 | /* We use this to override swap_symbol_in and swap_symbol_out. */ |
| 6760 | const struct elf_size_info elf32_arm_size_info = { |
| 6761 | sizeof (Elf32_External_Ehdr), |
| 6762 | sizeof (Elf32_External_Phdr), |
| 6763 | sizeof (Elf32_External_Shdr), |
| 6764 | sizeof (Elf32_External_Rel), |
| 6765 | sizeof (Elf32_External_Rela), |
| 6766 | sizeof (Elf32_External_Sym), |
| 6767 | sizeof (Elf32_External_Dyn), |
| 6768 | sizeof (Elf_External_Note), |
| 6769 | 4, |
| 6770 | 1, |
| 6771 | 32, 2, |
| 6772 | ELFCLASS32, EV_CURRENT, |
| 6773 | bfd_elf32_write_out_phdrs, |
| 6774 | bfd_elf32_write_shdrs_and_ehdr, |
| 6775 | bfd_elf32_write_relocs, |
| 6776 | elf32_arm_swap_symbol_in, |
| 6777 | elf32_arm_swap_symbol_out, |
| 6778 | bfd_elf32_slurp_reloc_table, |
| 6779 | bfd_elf32_slurp_symbol_table, |
| 6780 | bfd_elf32_swap_dyn_in, |
| 6781 | bfd_elf32_swap_dyn_out, |
| 6782 | bfd_elf32_swap_reloc_in, |
| 6783 | bfd_elf32_swap_reloc_out, |
| 6784 | bfd_elf32_swap_reloca_in, |
| 6785 | bfd_elf32_swap_reloca_out |
| 6786 | }; |
| 6787 | |
| 6788 | #define ELF_ARCH bfd_arch_arm |
| 6789 | #define ELF_MACHINE_CODE EM_ARM |
| 6790 | #ifdef __QNXTARGET__ |
| 6791 | #define ELF_MAXPAGESIZE 0x1000 |
| 6792 | #else |
| 6793 | #define ELF_MAXPAGESIZE 0x8000 |
| 6794 | #endif |
| 6795 | #define ELF_MINPAGESIZE 0x1000 |
| 6796 | |
| 6797 | #define bfd_elf32_mkobject elf32_arm_mkobject |
| 6798 | |
| 6799 | #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data |
| 6800 | #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data |
| 6801 | #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags |
| 6802 | #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data |
| 6803 | #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create |
| 6804 | #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup |
| 6805 | #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line |
| 6806 | #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info |
| 6807 | #define bfd_elf32_new_section_hook elf32_arm_new_section_hook |
| 6808 | #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol |
| 6809 | |
| 6810 | #define elf_backend_get_symbol_type elf32_arm_get_symbol_type |
| 6811 | #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook |
| 6812 | #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook |
| 6813 | #define elf_backend_check_relocs elf32_arm_check_relocs |
| 6814 | #define elf_backend_relocate_section elf32_arm_relocate_section |
| 6815 | #define elf_backend_write_section elf32_arm_write_section |
| 6816 | #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol |
| 6817 | #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections |
| 6818 | #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol |
| 6819 | #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections |
| 6820 | #define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook |
| 6821 | #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections |
| 6822 | #define elf_backend_post_process_headers elf32_arm_post_process_headers |
| 6823 | #define elf_backend_reloc_type_class elf32_arm_reloc_type_class |
| 6824 | #define elf_backend_object_p elf32_arm_object_p |
| 6825 | #define elf_backend_section_flags elf32_arm_section_flags |
| 6826 | #define elf_backend_fake_sections elf32_arm_fake_sections |
| 6827 | #define elf_backend_section_from_shdr elf32_arm_section_from_shdr |
| 6828 | #define elf_backend_final_write_processing elf32_arm_final_write_processing |
| 6829 | #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol |
| 6830 | #define elf_backend_symbol_processing elf32_arm_symbol_processing |
| 6831 | #define elf_backend_size_info elf32_arm_size_info |
| 6832 | #define elf_backend_modify_segment_map elf32_arm_modify_segment_map |
| 6833 | #define elf_backend_additional_program_headers \ |
| 6834 | elf32_arm_additional_program_headers |
| 6835 | |
| 6836 | #define elf_backend_can_refcount 1 |
| 6837 | #define elf_backend_can_gc_sections 1 |
| 6838 | #define elf_backend_plt_readonly 1 |
| 6839 | #define elf_backend_want_got_plt 1 |
| 6840 | #define elf_backend_want_plt_sym 0 |
| 6841 | #define elf_backend_may_use_rel_p 1 |
| 6842 | #define elf_backend_may_use_rela_p 0 |
| 6843 | #define elf_backend_default_use_rela_p 0 |
| 6844 | #define elf_backend_rela_normal 0 |
| 6845 | |
| 6846 | #define elf_backend_got_header_size 12 |
| 6847 | |
| 6848 | #include "elf32-target.h" |
| 6849 | |
| 6850 | /* VxWorks Targets */ |
| 6851 | |
| 6852 | #undef TARGET_LITTLE_SYM |
| 6853 | #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec |
| 6854 | #undef TARGET_LITTLE_NAME |
| 6855 | #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks" |
| 6856 | #undef TARGET_BIG_SYM |
| 6857 | #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec |
| 6858 | #undef TARGET_BIG_NAME |
| 6859 | #define TARGET_BIG_NAME "elf32-bigarm-vxworks" |
| 6860 | |
| 6861 | /* Like elf32_arm_link_hash_table_create -- but overrides |
| 6862 | appropriately for VxWorks. */ |
| 6863 | static struct bfd_link_hash_table * |
| 6864 | elf32_arm_vxworks_link_hash_table_create (bfd *abfd) |
| 6865 | { |
| 6866 | struct bfd_link_hash_table *ret; |
| 6867 | |
| 6868 | ret = elf32_arm_link_hash_table_create (abfd); |
| 6869 | if (ret) |
| 6870 | { |
| 6871 | struct elf32_arm_link_hash_table *htab |
| 6872 | = (struct elf32_arm_link_hash_table *)ret; |
| 6873 | htab->use_rel = 0; |
| 6874 | } |
| 6875 | return ret; |
| 6876 | } |
| 6877 | |
| 6878 | #undef elf32_bed |
| 6879 | #define elf32_bed elf32_arm_vxworks_bed |
| 6880 | |
| 6881 | #undef bfd_elf32_bfd_link_hash_table_create |
| 6882 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 6883 | elf32_arm_vxworks_link_hash_table_create |
| 6884 | |
| 6885 | #undef elf_backend_may_use_rel_p |
| 6886 | #define elf_backend_may_use_rel_p 0 |
| 6887 | #undef elf_backend_may_use_rela_p |
| 6888 | #define elf_backend_may_use_rela_p 1 |
| 6889 | #undef elf_backend_default_use_rela_p |
| 6890 | #define elf_backend_default_use_rela_p 1 |
| 6891 | #undef elf_backend_rela_normal |
| 6892 | #define elf_backend_rela_normal 1 |
| 6893 | |
| 6894 | #include "elf32-target.h" |
| 6895 | |
| 6896 | |
| 6897 | /* Symbian OS Targets */ |
| 6898 | |
| 6899 | #undef TARGET_LITTLE_SYM |
| 6900 | #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec |
| 6901 | #undef TARGET_LITTLE_NAME |
| 6902 | #define TARGET_LITTLE_NAME "elf32-littlearm-symbian" |
| 6903 | #undef TARGET_BIG_SYM |
| 6904 | #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec |
| 6905 | #undef TARGET_BIG_NAME |
| 6906 | #define TARGET_BIG_NAME "elf32-bigarm-symbian" |
| 6907 | |
| 6908 | /* Like elf32_arm_link_hash_table_create -- but overrides |
| 6909 | appropriately for Symbian OS. */ |
| 6910 | static struct bfd_link_hash_table * |
| 6911 | elf32_arm_symbian_link_hash_table_create (bfd *abfd) |
| 6912 | { |
| 6913 | struct bfd_link_hash_table *ret; |
| 6914 | |
| 6915 | ret = elf32_arm_link_hash_table_create (abfd); |
| 6916 | if (ret) |
| 6917 | { |
| 6918 | struct elf32_arm_link_hash_table *htab |
| 6919 | = (struct elf32_arm_link_hash_table *)ret; |
| 6920 | /* There is no PLT header for Symbian OS. */ |
| 6921 | htab->plt_header_size = 0; |
| 6922 | /* The PLT entries are each three instructions. */ |
| 6923 | htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry); |
| 6924 | htab->symbian_p = 1; |
| 6925 | /* Symbian uses armv5t or above, so use_blx is always true. */ |
| 6926 | htab->use_blx = 1; |
| 6927 | htab->root.is_relocatable_executable = 1; |
| 6928 | } |
| 6929 | return ret; |
| 6930 | } |
| 6931 | |
| 6932 | static const struct bfd_elf_special_section |
| 6933 | elf32_arm_symbian_special_sections[] = |
| 6934 | { |
| 6935 | /* In a BPABI executable, the dynamic linking sections do not go in |
| 6936 | the loadable read-only segment. The post-linker may wish to |
| 6937 | refer to these sections, but they are not part of the final |
| 6938 | program image. */ |
| 6939 | { ".dynamic", 8, 0, SHT_DYNAMIC, 0 }, |
| 6940 | { ".dynstr", 7, 0, SHT_STRTAB, 0 }, |
| 6941 | { ".dynsym", 7, 0, SHT_DYNSYM, 0 }, |
| 6942 | { ".got", 4, 0, SHT_PROGBITS, 0 }, |
| 6943 | { ".hash", 5, 0, SHT_HASH, 0 }, |
| 6944 | /* These sections do not need to be writable as the SymbianOS |
| 6945 | postlinker will arrange things so that no dynamic relocation is |
| 6946 | required. */ |
| 6947 | { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC }, |
| 6948 | { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC }, |
| 6949 | { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC }, |
| 6950 | { NULL, 0, 0, 0, 0 } |
| 6951 | }; |
| 6952 | |
| 6953 | static void |
| 6954 | elf32_arm_symbian_begin_write_processing (bfd *abfd, |
| 6955 | struct bfd_link_info *link_info |
| 6956 | ATTRIBUTE_UNUSED) |
| 6957 | { |
| 6958 | /* BPABI objects are never loaded directly by an OS kernel; they are |
| 6959 | processed by a postlinker first, into an OS-specific format. If |
| 6960 | the D_PAGED bit is set on the file, BFD will align segments on |
| 6961 | page boundaries, so that an OS can directly map the file. With |
| 6962 | BPABI objects, that just results in wasted space. In addition, |
| 6963 | because we clear the D_PAGED bit, map_sections_to_segments will |
| 6964 | recognize that the program headers should not be mapped into any |
| 6965 | loadable segment. */ |
| 6966 | abfd->flags &= ~D_PAGED; |
| 6967 | } |
| 6968 | |
| 6969 | static bfd_boolean |
| 6970 | elf32_arm_symbian_modify_segment_map (bfd *abfd, |
| 6971 | struct bfd_link_info *info) |
| 6972 | { |
| 6973 | struct elf_segment_map *m; |
| 6974 | asection *dynsec; |
| 6975 | |
| 6976 | /* BPABI shared libraries and executables should have a PT_DYNAMIC |
| 6977 | segment. However, because the .dynamic section is not marked |
| 6978 | with SEC_LOAD, the generic ELF code will not create such a |
| 6979 | segment. */ |
| 6980 | dynsec = bfd_get_section_by_name (abfd, ".dynamic"); |
| 6981 | if (dynsec) |
| 6982 | { |
| 6983 | m = _bfd_elf_make_dynamic_segment (abfd, dynsec); |
| 6984 | m->next = elf_tdata (abfd)->segment_map; |
| 6985 | elf_tdata (abfd)->segment_map = m; |
| 6986 | } |
| 6987 | |
| 6988 | /* Also call the generic arm routine. */ |
| 6989 | return elf32_arm_modify_segment_map (abfd, info); |
| 6990 | } |
| 6991 | |
| 6992 | #undef elf32_bed |
| 6993 | #define elf32_bed elf32_arm_symbian_bed |
| 6994 | |
| 6995 | /* The dynamic sections are not allocated on SymbianOS; the postlinker |
| 6996 | will process them and then discard them. */ |
| 6997 | #undef ELF_DYNAMIC_SEC_FLAGS |
| 6998 | #define ELF_DYNAMIC_SEC_FLAGS \ |
| 6999 | (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED) |
| 7000 | |
| 7001 | #undef bfd_elf32_bfd_link_hash_table_create |
| 7002 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 7003 | elf32_arm_symbian_link_hash_table_create |
| 7004 | |
| 7005 | #undef elf_backend_special_sections |
| 7006 | #define elf_backend_special_sections elf32_arm_symbian_special_sections |
| 7007 | |
| 7008 | #undef elf_backend_begin_write_processing |
| 7009 | #define elf_backend_begin_write_processing \ |
| 7010 | elf32_arm_symbian_begin_write_processing |
| 7011 | |
| 7012 | #undef elf_backend_modify_segment_map |
| 7013 | #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map |
| 7014 | |
| 7015 | /* There is no .got section for BPABI objects, and hence no header. */ |
| 7016 | #undef elf_backend_got_header_size |
| 7017 | #define elf_backend_got_header_size 0 |
| 7018 | |
| 7019 | /* Similarly, there is no .got.plt section. */ |
| 7020 | #undef elf_backend_want_got_plt |
| 7021 | #define elf_backend_want_got_plt 0 |
| 7022 | |
| 7023 | #undef elf_backend_may_use_rel_p |
| 7024 | #define elf_backend_may_use_rel_p 1 |
| 7025 | #undef elf_backend_may_use_rela_p |
| 7026 | #define elf_backend_may_use_rela_p 0 |
| 7027 | #undef elf_backend_default_use_rela_p |
| 7028 | #define elf_backend_default_use_rela_p 0 |
| 7029 | #undef elf_backend_rela_normal |
| 7030 | #define elf_backend_rela_normal 0 |
| 7031 | |
| 7032 | #include "elf32-target.h" |