1/* TILE-Gx-specific support for ELF. 2 Copyright (C) 2011-2022 Free Software Foundation, Inc. 3 4 This file is part of BFD, the Binary File Descriptor library. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 19 MA 02110-1301, USA. */ 20 21#include "sysdep.h" 22#include "bfd.h" 23#include "libbfd.h" 24#include "elf-bfd.h" 25#include "elf/tilegx.h" 26#include "opcode/tilegx.h" 27#include "libiberty.h" 28#include "elfxx-tilegx.h" 29 30#define ABI_64_P(abfd) \ 31 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64) 32 33#define TILEGX_ELF_WORD_BYTES(htab) \ 34 ((htab)->bytes_per_word) 35 36/* The size of an external RELA relocation. */ 37#define TILEGX_ELF_RELA_BYTES(htab) \ 38 ((htab)->bytes_per_rela) 39 40/* Both 32-bit and 64-bit tilegx encode this in an identical manner, 41 so just take advantage of that. */ 42#define TILEGX_ELF_R_TYPE(r_info) \ 43 ((r_info) & 0xFF) 44 45#define TILEGX_ELF_R_INFO(htab, in_rel, index, type) \ 46 ((htab)->r_info (in_rel, index, type)) 47 48#define TILEGX_ELF_R_SYMNDX(htab, r_info) \ 49 ((htab)->r_symndx(r_info)) 50 51#define TILEGX_ELF_DTPOFF_RELOC(htab) \ 52 ((htab)->dtpoff_reloc) 53 54#define TILEGX_ELF_DTPMOD_RELOC(htab) \ 55 ((htab)->dtpmod_reloc) 56 57#define TILEGX_ELF_TPOFF_RELOC(htab) \ 58 ((htab)->tpoff_reloc) 59 60#define TILEGX_ELF_PUT_WORD(htab, bfd, val, ptr) \ 61 ((htab)->put_word (bfd, val, ptr)) 62 63/* The name of the dynamic interpreter. This is put in the .interp 64 section. */ 65 66#define ELF64_DYNAMIC_INTERPRETER "/lib/ld.so.1" 67#define ELF32_DYNAMIC_INTERPRETER "/lib32/ld.so.1" 68 69 70static reloc_howto_type tilegx_elf_howto_table [] = 71{ 72 /* This reloc does nothing. */ 73 HOWTO (R_TILEGX_NONE, /* type */ 74 0, /* rightshift */ 75 0, /* size */ 76 0, /* bitsize */ 77 false, /* pc_relative */ 78 0, /* bitpos */ 79 complain_overflow_dont, /* complain_on_overflow */ 80 bfd_elf_generic_reloc, /* special_function */ 81 "R_TILEGX_NONE", /* name */ 82 false, /* partial_inplace */ 83 0, /* src_mask */ 84 0, /* dst_mask */ 85 false), /* pcrel_offset */ 86#ifdef BFD64 87 /* A 64 bit absolute relocation. */ 88 HOWTO (R_TILEGX_64, /* type */ 89 0, /* rightshift */ 90 8, /* size */ 91 64, /* bitsize */ 92 false, /* pc_relative */ 93 0, /* bitpos */ 94 complain_overflow_dont, /* complain_on_overflow */ 95 bfd_elf_generic_reloc, /* special_function */ 96 "R_TILEGX_64", /* name */ 97 false, /* partial_inplace */ 98 0, /* src_mask */ 99 0xffffffffffffffffULL, /* dst_mask */ 100 false), /* pcrel_offset */ 101#endif 102 /* A 32 bit absolute relocation. */ 103 HOWTO (R_TILEGX_32, /* type */ 104 0, /* rightshift */ 105 4, /* size */ 106 32, /* bitsize */ 107 false, /* pc_relative */ 108 0, /* bitpos */ 109 complain_overflow_dont, /* complain_on_overflow */ 110 bfd_elf_generic_reloc, /* special_function */ 111 "R_TILEGX_32", /* name */ 112 false, /* partial_inplace */ 113 0, /* src_mask */ 114 0xffffffff, /* dst_mask */ 115 false), /* pcrel_offset */ 116 117 /* A 16 bit absolute relocation. */ 118 HOWTO (R_TILEGX_16, /* type */ 119 0, /* rightshift */ 120 2, /* size */ 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_TILEGX_16", /* name */ 127 false, /* partial_inplace */ 128 0, /* src_mask */ 129 0xffff, /* dst_mask */ 130 false), /* pcrel_offset */ 131 132 /* An 8 bit absolute relocation. */ 133 HOWTO (R_TILEGX_8, /* type */ 134 0, /* rightshift */ 135 1, /* size */ 136 8, /* bitsize */ 137 false, /* pc_relative */ 138 0, /* bitpos */ 139 complain_overflow_unsigned, /* complain_on_overflow */ 140 bfd_elf_generic_reloc, /* special_function */ 141 "R_TILEGX_8", /* name */ 142 false, /* partial_inplace */ 143 0, /* src_mask */ 144 0xff, /* dst_mask */ 145 false), /* pcrel_offset */ 146#ifdef BFD64 147 /* A 64 bit pc-relative relocation. */ 148 HOWTO (R_TILEGX_64_PCREL,/* type */ 149 0, /* rightshift */ 150 8, /* size */ 151 64, /* bitsize */ 152 true, /* pc_relative */ 153 0, /* bitpos */ 154 complain_overflow_dont, /* complain_on_overflow */ 155 bfd_elf_generic_reloc, /* special_function */ 156 "R_TILEGX_32_PCREL", /* name */ 157 false, /* partial_inplace */ 158 0, /* src_mask */ 159 0xffffffffffffffffULL, /* dst_mask */ 160 true), /* pcrel_offset */ 161#endif 162 /* A 32 bit pc-relative relocation. */ 163 HOWTO (R_TILEGX_32_PCREL,/* type */ 164 0, /* rightshift */ 165 4, /* size */ 166 32, /* bitsize */ 167 true, /* pc_relative */ 168 0, /* bitpos */ 169 complain_overflow_dont, /* complain_on_overflow */ 170 bfd_elf_generic_reloc, /* special_function */ 171 "R_TILEGX_32_PCREL", /* name */ 172 false, /* partial_inplace */ 173 0, /* src_mask */ 174 0xffffffff, /* dst_mask */ 175 true), /* pcrel_offset */ 176 177 /* A 16 bit pc-relative relocation. */ 178 HOWTO (R_TILEGX_16_PCREL,/* type */ 179 0, /* rightshift */ 180 2, /* size */ 181 16, /* bitsize */ 182 true, /* pc_relative */ 183 0, /* bitpos */ 184 complain_overflow_signed, /* complain_on_overflow */ 185 bfd_elf_generic_reloc, /* special_function */ 186 "R_TILEGX_16_PCREL", /* name */ 187 false, /* partial_inplace */ 188 0, /* src_mask */ 189 0xffff, /* dst_mask */ 190 true), /* pcrel_offset */ 191 192 /* An 8 bit pc-relative relocation. */ 193 HOWTO (R_TILEGX_8_PCREL, /* type */ 194 0, /* rightshift */ 195 1, /* size */ 196 8, /* bitsize */ 197 true, /* pc_relative */ 198 0, /* bitpos */ 199 complain_overflow_signed, /* complain_on_overflow */ 200 bfd_elf_generic_reloc, /* special_function */ 201 "R_TILEGX_8_PCREL",/* name */ 202 false, /* partial_inplace */ 203 0, /* src_mask */ 204 0xff, /* dst_mask */ 205 true), /* pcrel_offset */ 206 207 /* A 16 bit relocation without overflow. */ 208 HOWTO (R_TILEGX_HW0, /* type */ 209 0, /* rightshift */ 210 2, /* size */ 211 16, /* bitsize */ 212 false, /* pc_relative */ 213 0, /* bitpos */ 214 complain_overflow_dont,/* complain_on_overflow */ 215 bfd_elf_generic_reloc, /* special_function */ 216 "R_TILEGX_HW0", /* name */ 217 false, /* partial_inplace */ 218 0, /* src_mask */ 219 0xffff, /* dst_mask */ 220 false), /* pcrel_offset */ 221 222 /* A 16 bit relocation without overflow. */ 223 HOWTO (R_TILEGX_HW1, /* type */ 224 16, /* rightshift */ 225 2, /* size */ 226 16, /* bitsize */ 227 false, /* pc_relative */ 228 0, /* bitpos */ 229 complain_overflow_dont,/* complain_on_overflow */ 230 bfd_elf_generic_reloc, /* special_function */ 231 "R_TILEGX_HW1", /* name */ 232 false, /* partial_inplace */ 233 0, /* src_mask */ 234 0xffff, /* dst_mask */ 235 false), /* pcrel_offset */ 236 237 /* A 16 bit relocation without overflow. */ 238 HOWTO (R_TILEGX_HW2, /* type */ 239 32, /* rightshift */ 240 2, /* size */ 241 16, /* bitsize */ 242 false, /* pc_relative */ 243 0, /* bitpos */ 244 complain_overflow_dont,/* complain_on_overflow */ 245 bfd_elf_generic_reloc, /* special_function */ 246 "R_TILEGX_HW2", /* name */ 247 false, /* partial_inplace */ 248 0, /* src_mask */ 249 0xffff, /* dst_mask */ 250 false), /* pcrel_offset */ 251 252 /* A 16 bit relocation without overflow. */ 253 HOWTO (R_TILEGX_HW3, /* type */ 254 48, /* rightshift */ 255 2, /* size */ 256 16, /* bitsize */ 257 false, /* pc_relative */ 258 0, /* bitpos */ 259 complain_overflow_dont,/* complain_on_overflow */ 260 bfd_elf_generic_reloc, /* special_function */ 261 "R_TILEGX_HW3", /* name */ 262 false, /* partial_inplace */ 263 0, /* src_mask */ 264 0xffff, /* dst_mask */ 265 false), /* pcrel_offset */ 266 267 /* A 16 bit relocation with overflow. */ 268 HOWTO (R_TILEGX_HW0_LAST, /* type */ 269 0, /* rightshift */ 270 2, /* size */ 271 16, /* bitsize */ 272 false, /* pc_relative */ 273 0, /* bitpos */ 274 complain_overflow_signed,/* complain_on_overflow */ 275 bfd_elf_generic_reloc, /* special_function */ 276 "R_TILEGX_HW0_LAST", /* name */ 277 false, /* partial_inplace */ 278 0, /* src_mask */ 279 0xffff, /* dst_mask */ 280 false), /* pcrel_offset */ 281 282 /* A 16 bit relocation with overflow. */ 283 HOWTO (R_TILEGX_HW1_LAST, /* type */ 284 16, /* rightshift */ 285 2, /* size */ 286 16, /* bitsize */ 287 false, /* pc_relative */ 288 0, /* bitpos */ 289 complain_overflow_signed,/* complain_on_overflow */ 290 bfd_elf_generic_reloc, /* special_function */ 291 "R_TILEGX_HW1_LAST", /* name */ 292 false, /* partial_inplace */ 293 0, /* src_mask */ 294 0xffff, /* dst_mask */ 295 false), /* pcrel_offset */ 296 297 /* A 16 bit relocation with overflow. */ 298 HOWTO (R_TILEGX_HW2_LAST, /* type */ 299 32, /* rightshift */ 300 2, /* size */ 301 16, /* bitsize */ 302 false, /* pc_relative */ 303 0, /* bitpos */ 304 complain_overflow_signed,/* complain_on_overflow */ 305 bfd_elf_generic_reloc, /* special_function */ 306 "R_TILEGX_HW2_LAST", /* name */ 307 false, /* partial_inplace */ 308 0, /* src_mask */ 309 0xffff, /* dst_mask */ 310 false), /* pcrel_offset */ 311 312 HOWTO (R_TILEGX_COPY, /* type */ 313 0, /* rightshift */ 314 0, /* size */ 315 0, /* bitsize */ 316 false, /* pc_relative */ 317 0, /* bitpos */ 318 complain_overflow_dont, /* complain_on_overflow */ 319 bfd_elf_generic_reloc, /* special_function */ 320 "R_TILEGX_COPY", /* name */ 321 false, /* partial_inplace */ 322 0, /* src_mask */ 323 0, /* dst_mask */ 324 true), /* pcrel_offset */ 325 326 HOWTO (R_TILEGX_GLOB_DAT, /* type */ 327 0, /* rightshift */ 328 0, /* size */ 329 0, /* bitsize */ 330 false, /* pc_relative */ 331 0, /* bitpos */ 332 complain_overflow_dont, /* complain_on_overflow */ 333 bfd_elf_generic_reloc, /* special_function */ 334 "R_TILEGX_GLOB_DAT", /* name */ 335 false, /* partial_inplace */ 336 0, /* src_mask */ 337 0, /* dst_mask */ 338 true), /* pcrel_offset */ 339 340 HOWTO (R_TILEGX_JMP_SLOT, /* type */ 341 0, /* rightshift */ 342 0, /* size */ 343 0, /* bitsize */ 344 false, /* pc_relative */ 345 0, /* bitpos */ 346 complain_overflow_dont, /* complain_on_overflow */ 347 bfd_elf_generic_reloc, /* special_function */ 348 "R_TILEGX_JMP_SLOT", /* name */ 349 false, /* partial_inplace */ 350 0, /* src_mask */ 351 0, /* dst_mask */ 352 true), /* pcrel_offset */ 353 354 HOWTO (R_TILEGX_RELATIVE, /* type */ 355 0, /* rightshift */ 356 0, /* size */ 357 0, /* bitsize */ 358 false, /* pc_relative */ 359 0, /* bitpos */ 360 complain_overflow_dont, /* complain_on_overflow */ 361 bfd_elf_generic_reloc, /* special_function */ 362 "R_TILEGX_RELATIVE", /* name */ 363 false, /* partial_inplace */ 364 0, /* src_mask */ 365 0, /* dst_mask */ 366 true), /* pcrel_offset */ 367 368 HOWTO (R_TILEGX_BROFF_X1, /* type */ 369 TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES, /* rightshift */ 370 4, /* size */ 371 17, /* bitsize */ 372 true, /* pc_relative */ 373 0, /* bitpos */ 374 complain_overflow_signed, /* complain_on_overflow */ 375 bfd_elf_generic_reloc, /* special_function */ 376 "R_TILEGX_BROFF_X1", /* name */ 377 false, /* partial_inplace */ 378 0, /* src_mask */ 379 -1, /* dst_mask */ 380 true), /* pcrel_offset */ 381 382 HOWTO (R_TILEGX_JUMPOFF_X1, /* type */ 383 TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES, /* rightshift */ 384 4, /* size */ 385 27, /* bitsize */ 386 true, /* pc_relative */ 387 0, /* bitpos */ 388 complain_overflow_signed,/* complain_on_overflow */ 389 bfd_elf_generic_reloc, /* special_function */ 390 "R_TILEGX_JUMPOFF_X1", /* name */ 391 false, /* partial_inplace */ 392 0, /* src_mask */ 393 -1, /* dst_mask */ 394 true), /* pcrel_offset */ 395 396 HOWTO (R_TILEGX_JUMPOFF_X1_PLT, /* type */ 397 TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES, /* rightshift */ 398 4, /* size */ 399 27, /* bitsize */ 400 true, /* pc_relative */ 401 0, /* bitpos */ 402 complain_overflow_signed,/* complain_on_overflow */ 403 bfd_elf_generic_reloc, /* special_function */ 404 "R_TILEGX_JUMPOFF_X1_PLT", /* name */ 405 false, /* partial_inplace */ 406 0, /* src_mask */ 407 -1, /* dst_mask */ 408 true), /* pcrel_offset */ 409 410#define TILEGX_IMM_HOWTO(name, size, bitsize) \ 411 HOWTO (name, 0, size, bitsize, false, 0, \ 412 complain_overflow_signed, bfd_elf_generic_reloc, \ 413 #name, false, 0, -1, false) 414 415#define TILEGX_UIMM_HOWTO(name, size, bitsize) \ 416 HOWTO (name, 0, size, bitsize, false, 0, \ 417 complain_overflow_unsigned, bfd_elf_generic_reloc, \ 418 #name, false, 0, -1, false) 419 420 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X0, 1, 8), 421 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y0, 1, 8), 422 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X1, 1, 8), 423 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y1, 1, 8), 424 TILEGX_IMM_HOWTO(R_TILEGX_DEST_IMM8_X1, 1, 8), 425 426 TILEGX_UIMM_HOWTO(R_TILEGX_MT_IMM14_X1, 2, 14), 427 TILEGX_UIMM_HOWTO(R_TILEGX_MF_IMM14_X1, 2, 14), 428 429 TILEGX_UIMM_HOWTO(R_TILEGX_MMSTART_X0, 1, 6), 430 TILEGX_UIMM_HOWTO(R_TILEGX_MMEND_X0, 1, 6), 431 432 TILEGX_UIMM_HOWTO(R_TILEGX_SHAMT_X0, 1, 6), 433 TILEGX_UIMM_HOWTO(R_TILEGX_SHAMT_X1, 1, 6), 434 TILEGX_UIMM_HOWTO(R_TILEGX_SHAMT_Y0, 1, 6), 435 TILEGX_UIMM_HOWTO(R_TILEGX_SHAMT_Y1, 1, 6), 436 437#define TILEGX_IMM16_HOWTO(name, rshift) \ 438 HOWTO (name, rshift, 2, 16, false, 0, \ 439 complain_overflow_dont, bfd_elf_generic_reloc, \ 440 #name, false, 0, 0xffff, false) 441 442 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW0, 0), 443 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW0, 0), 444 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW1, 16), 445 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW1, 16), 446 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW2, 32), 447 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW2, 32), 448 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW3, 48), 449 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW3, 48), 450 451#define TILEGX_IMM16_HOWTO_LAST(name, rshift) \ 452 HOWTO (name, rshift, 2, 16, false, 0, \ 453 complain_overflow_signed, bfd_elf_generic_reloc, \ 454 #name, false, 0, 0xffff, false) 455 456 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW0_LAST, 0), 457 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW0_LAST, 0), 458 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW1_LAST, 16), 459 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW1_LAST, 16), 460 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW2_LAST, 32), 461 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW2_LAST, 32), 462 463 /* PC-relative offsets. */ 464 465#define TILEGX_IMM16_HOWTO_PCREL(name, rshift) \ 466 HOWTO (name, rshift, 2, 16, true, 0, \ 467 complain_overflow_dont, bfd_elf_generic_reloc, \ 468 #name, false, 0, 0xffff, true) 469 470 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW0_PCREL, 0), 471 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW0_PCREL, 0), 472 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW1_PCREL, 16), 473 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW1_PCREL, 16), 474 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW2_PCREL, 32), 475 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW2_PCREL, 32), 476 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW3_PCREL, 48), 477 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW3_PCREL, 48), 478 479#define TILEGX_IMM16_HOWTO_LAST_PCREL(name, rshift) \ 480 HOWTO (name, rshift, 2, 16, true, 0, \ 481 complain_overflow_signed, bfd_elf_generic_reloc, \ 482 #name, false, 0, 0xffff, true) 483 484 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW0_LAST_PCREL, 0), 485 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW0_LAST_PCREL, 0), 486 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW1_LAST_PCREL, 16), 487 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW1_LAST_PCREL, 16), 488 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW2_LAST_PCREL, 32), 489 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW2_LAST_PCREL, 32), 490 491 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW0_GOT, 0), 492 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW0_GOT, 0), 493 494 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW0_PLT_PCREL, 0), 495 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW0_PLT_PCREL, 0), 496 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW1_PLT_PCREL, 16), 497 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW1_PLT_PCREL, 16), 498 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW2_PLT_PCREL, 32), 499 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW2_PLT_PCREL, 32), 500 501 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW0_LAST_GOT, 0), 502 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW0_LAST_GOT, 0), 503 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW1_LAST_GOT, 16), 504 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW1_LAST_GOT, 16), 505 506 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW3_PLT_PCREL, 48), 507 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW3_PLT_PCREL, 48), 508 509 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW0_TLS_GD, 0), 510 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW0_TLS_GD, 0), 511 512 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW0_TLS_LE, 0), 513 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW0_TLS_LE, 0), 514 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE, 0), 515 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE, 0), 516 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE, 16), 517 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE, 16), 518 519 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD, 0), 520 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD, 0), 521 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD, 16), 522 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD, 16), 523 EMPTY_HOWTO (90), 524 EMPTY_HOWTO (91), 525 526#define TILEGX_IMM16_HOWTO_TLS_IE(name, rshift) \ 527 HOWTO (name, rshift, 2, 16, false, 0, \ 528 complain_overflow_dont, bfd_elf_generic_reloc, \ 529 #name, false, 0, 0xffff, true) 530 531 TILEGX_IMM16_HOWTO_TLS_IE (R_TILEGX_IMM16_X0_HW0_TLS_IE, 0), 532 TILEGX_IMM16_HOWTO_TLS_IE (R_TILEGX_IMM16_X1_HW0_TLS_IE, 0), 533 534 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL, 0), 535 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL, 0), 536 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL, 16), 537 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL, 16), 538 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL, 32), 539 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL, 32), 540 541#define TILEGX_IMM16_HOWTO_LAST_TLS_IE(name, rshift) \ 542 HOWTO (name, rshift, 2, 16, false, 0, \ 543 complain_overflow_signed, bfd_elf_generic_reloc, \ 544 #name, false, 0, 0xffff, true) 545 546 TILEGX_IMM16_HOWTO_LAST_TLS_IE (R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE, 0), 547 TILEGX_IMM16_HOWTO_LAST_TLS_IE (R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE, 0), 548 TILEGX_IMM16_HOWTO_LAST_TLS_IE (R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE, 16), 549 TILEGX_IMM16_HOWTO_LAST_TLS_IE (R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE, 16), 550 EMPTY_HOWTO (104), 551 EMPTY_HOWTO (105), 552 553 HOWTO(R_TILEGX_TLS_DTPMOD64, 0, 0, 0, false, 0, complain_overflow_dont, 554 bfd_elf_generic_reloc, "R_TILEGX_TLS_DTPMOD64", 555 false, 0, 0, true), 556 HOWTO(R_TILEGX_TLS_DTPOFF64, 0, 8, 64, false, 0, complain_overflow_bitfield, 557 bfd_elf_generic_reloc, "R_TILEGX_TLS_DTPOFF64", 558 false, 0, -1, true), 559 HOWTO(R_TILEGX_TLS_TPOFF64, 0, 0, 0, false, 0, complain_overflow_dont, 560 bfd_elf_generic_reloc, "R_TILEGX_TLS_TPOFF64", 561 false, 0, 0, true), 562 563 HOWTO(R_TILEGX_TLS_DTPMOD32, 0, 0, 0, false, 0, complain_overflow_dont, 564 bfd_elf_generic_reloc, "R_TILEGX_TLS_DTPMOD32", 565 false, 0, 0, true), 566 HOWTO(R_TILEGX_TLS_DTPOFF32, 0, 8, 32, false, 0, complain_overflow_bitfield, 567 bfd_elf_generic_reloc, "R_TILEGX_TLS_DTPOFF32", 568 false, 0, -1, true), 569 HOWTO(R_TILEGX_TLS_TPOFF32, 0, 0, 0, false, 0, complain_overflow_dont, 570 bfd_elf_generic_reloc, "R_TILEGX_TLS_TPOFF32", 571 false, 0, 0, true), 572 573 HOWTO (R_TILEGX_TLS_GD_CALL, /* type */ 574 TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES, /* rightshift */ 575 4, /* size */ 576 27, /* bitsize */ 577 true, /* pc_relative */ 578 0, /* bitpos */ 579 complain_overflow_signed,/* complain_on_overflow */ 580 bfd_elf_generic_reloc, /* special_function */ 581 "R_TILEGX_TLS_GD_CALL", /* name */ 582 false, /* partial_inplace */ 583 0, /* src_mask */ 584 -1, /* dst_mask */ 585 true), /* pcrel_offset */ 586 587 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X0_TLS_GD_ADD, 1, 8), 588 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X1_TLS_GD_ADD, 1, 8), 589 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y0_TLS_GD_ADD, 1, 8), 590 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y1_TLS_GD_ADD, 1, 8), 591 TILEGX_IMM_HOWTO(R_TILEGX_TLS_IE_LOAD, 1, 8), 592 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X0_TLS_ADD, 1, 8), 593 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X1_TLS_ADD, 1, 8), 594 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y0_TLS_ADD, 1, 8), 595 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y1_TLS_ADD, 1, 8), 596}; 597 598static reloc_howto_type tilegx_elf_howto_table2 [] = 599{ 600 /* GNU extension to record C++ vtable hierarchy */ 601 HOWTO (R_TILEGX_GNU_VTINHERIT, /* type */ 602 0, /* rightshift */ 603 8, /* size */ 604 0, /* bitsize */ 605 false, /* pc_relative */ 606 0, /* bitpos */ 607 complain_overflow_dont, /* complain_on_overflow */ 608 NULL, /* special_function */ 609 "R_TILEGX_GNU_VTINHERIT", /* name */ 610 false, /* partial_inplace */ 611 0, /* src_mask */ 612 0, /* dst_mask */ 613 false), /* pcrel_offset */ 614 615 /* GNU extension to record C++ vtable member usage */ 616 HOWTO (R_TILEGX_GNU_VTENTRY, /* type */ 617 0, /* rightshift */ 618 8, /* size */ 619 0, /* bitsize */ 620 false, /* pc_relative */ 621 0, /* bitpos */ 622 complain_overflow_dont, /* complain_on_overflow */ 623 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 624 "R_TILEGX_GNU_VTENTRY", /* name */ 625 false, /* partial_inplace */ 626 0, /* src_mask */ 627 0, /* dst_mask */ 628 false), /* pcrel_offset */ 629 630}; 631 632/* Map BFD reloc types to TILEGX ELF reloc types. */ 633 634typedef struct tilegx_reloc_map 635{ 636 bfd_reloc_code_real_type bfd_reloc_val; 637 unsigned int tilegx_reloc_val; 638 reloc_howto_type * table; 639} reloc_map; 640 641static const reloc_map tilegx_reloc_map [] = 642{ 643#define TH_REMAP(bfd, tilegx) \ 644 { bfd, tilegx, tilegx_elf_howto_table }, 645 646 /* Standard relocations. */ 647 TH_REMAP (BFD_RELOC_NONE, R_TILEGX_NONE) 648 TH_REMAP (BFD_RELOC_64, R_TILEGX_64) 649 TH_REMAP (BFD_RELOC_32, R_TILEGX_32) 650 TH_REMAP (BFD_RELOC_16, R_TILEGX_16) 651 TH_REMAP (BFD_RELOC_8, R_TILEGX_8) 652 TH_REMAP (BFD_RELOC_64_PCREL, R_TILEGX_64_PCREL) 653 TH_REMAP (BFD_RELOC_32_PCREL, R_TILEGX_32_PCREL) 654 TH_REMAP (BFD_RELOC_16_PCREL, R_TILEGX_16_PCREL) 655 TH_REMAP (BFD_RELOC_8_PCREL, R_TILEGX_8_PCREL) 656 657#define SIMPLE_REMAP(t) TH_REMAP (BFD_RELOC_##t, R_##t) 658 659 /* Custom relocations. */ 660 SIMPLE_REMAP (TILEGX_HW0) 661 SIMPLE_REMAP (TILEGX_HW1) 662 SIMPLE_REMAP (TILEGX_HW2) 663 SIMPLE_REMAP (TILEGX_HW3) 664 SIMPLE_REMAP (TILEGX_HW0_LAST) 665 SIMPLE_REMAP (TILEGX_HW1_LAST) 666 SIMPLE_REMAP (TILEGX_HW2_LAST) 667 SIMPLE_REMAP (TILEGX_COPY) 668 SIMPLE_REMAP (TILEGX_GLOB_DAT) 669 SIMPLE_REMAP (TILEGX_JMP_SLOT) 670 SIMPLE_REMAP (TILEGX_RELATIVE) 671 SIMPLE_REMAP (TILEGX_BROFF_X1) 672 SIMPLE_REMAP (TILEGX_JUMPOFF_X1) 673 SIMPLE_REMAP (TILEGX_JUMPOFF_X1_PLT) 674 SIMPLE_REMAP (TILEGX_IMM8_X0) 675 SIMPLE_REMAP (TILEGX_IMM8_Y0) 676 SIMPLE_REMAP (TILEGX_IMM8_X1) 677 SIMPLE_REMAP (TILEGX_IMM8_Y1) 678 SIMPLE_REMAP (TILEGX_DEST_IMM8_X1) 679 SIMPLE_REMAP (TILEGX_MT_IMM14_X1) 680 SIMPLE_REMAP (TILEGX_MF_IMM14_X1) 681 SIMPLE_REMAP (TILEGX_MMSTART_X0) 682 SIMPLE_REMAP (TILEGX_MMEND_X0) 683 SIMPLE_REMAP (TILEGX_SHAMT_X0) 684 SIMPLE_REMAP (TILEGX_SHAMT_X1) 685 SIMPLE_REMAP (TILEGX_SHAMT_Y0) 686 SIMPLE_REMAP (TILEGX_SHAMT_Y1) 687 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0) 688 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0) 689 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1) 690 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1) 691 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2) 692 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2) 693 SIMPLE_REMAP (TILEGX_IMM16_X0_HW3) 694 SIMPLE_REMAP (TILEGX_IMM16_X1_HW3) 695 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST) 696 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST) 697 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST) 698 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST) 699 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_LAST) 700 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_LAST) 701 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_PCREL) 702 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_PCREL) 703 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_PCREL) 704 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_PCREL) 705 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_PCREL) 706 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_PCREL) 707 SIMPLE_REMAP (TILEGX_IMM16_X0_HW3_PCREL) 708 SIMPLE_REMAP (TILEGX_IMM16_X1_HW3_PCREL) 709 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_PCREL) 710 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_PCREL) 711 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_PCREL) 712 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_PCREL) 713 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_LAST_PCREL) 714 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_LAST_PCREL) 715 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_GOT) 716 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_GOT) 717 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_PLT_PCREL) 718 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_PLT_PCREL) 719 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_PLT_PCREL) 720 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_PLT_PCREL) 721 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_PLT_PCREL) 722 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_PLT_PCREL) 723 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_GOT) 724 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_GOT) 725 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_GOT) 726 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_GOT) 727 SIMPLE_REMAP (TILEGX_IMM16_X0_HW3_PLT_PCREL) 728 SIMPLE_REMAP (TILEGX_IMM16_X1_HW3_PLT_PCREL) 729 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_TLS_GD) 730 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_TLS_GD) 731 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_TLS_LE) 732 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_TLS_LE) 733 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_TLS_LE) 734 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_TLS_LE) 735 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_TLS_LE) 736 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_TLS_LE) 737 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_TLS_GD) 738 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_TLS_GD) 739 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_TLS_GD) 740 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_TLS_GD) 741 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_TLS_IE) 742 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_TLS_IE) 743 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL) 744 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL) 745 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL) 746 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL) 747 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL) 748 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL) 749 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_TLS_IE) 750 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_TLS_IE) 751 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_TLS_IE) 752 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_TLS_IE) 753 754 SIMPLE_REMAP (TILEGX_TLS_DTPMOD64) 755 SIMPLE_REMAP (TILEGX_TLS_DTPOFF64) 756 SIMPLE_REMAP (TILEGX_TLS_TPOFF64) 757 758 SIMPLE_REMAP (TILEGX_TLS_DTPMOD32) 759 SIMPLE_REMAP (TILEGX_TLS_DTPOFF32) 760 SIMPLE_REMAP (TILEGX_TLS_TPOFF32) 761 762 SIMPLE_REMAP (TILEGX_TLS_GD_CALL) 763 SIMPLE_REMAP (TILEGX_IMM8_X0_TLS_GD_ADD) 764 SIMPLE_REMAP (TILEGX_IMM8_X1_TLS_GD_ADD) 765 SIMPLE_REMAP (TILEGX_IMM8_Y0_TLS_GD_ADD) 766 SIMPLE_REMAP (TILEGX_IMM8_Y1_TLS_GD_ADD) 767 SIMPLE_REMAP (TILEGX_TLS_IE_LOAD) 768 SIMPLE_REMAP (TILEGX_IMM8_X0_TLS_ADD) 769 SIMPLE_REMAP (TILEGX_IMM8_X1_TLS_ADD) 770 SIMPLE_REMAP (TILEGX_IMM8_Y0_TLS_ADD) 771 SIMPLE_REMAP (TILEGX_IMM8_Y1_TLS_ADD) 772 773#undef SIMPLE_REMAP 774#undef TH_REMAP 775 776 { BFD_RELOC_VTABLE_INHERIT, R_TILEGX_GNU_VTINHERIT, tilegx_elf_howto_table2 }, 777 { BFD_RELOC_VTABLE_ENTRY, R_TILEGX_GNU_VTENTRY, tilegx_elf_howto_table2 }, 778}; 779 780 781 782/* TILEGX ELF linker hash entry. */ 783 784struct tilegx_elf_link_hash_entry 785{ 786 struct elf_link_hash_entry elf; 787 788#define GOT_UNKNOWN 0 789#define GOT_NORMAL 1 790#define GOT_TLS_GD 2 791#define GOT_TLS_IE 4 792 unsigned char tls_type; 793}; 794 795#define tilegx_elf_hash_entry(ent) \ 796 ((struct tilegx_elf_link_hash_entry *)(ent)) 797 798struct _bfd_tilegx_elf_obj_tdata 799{ 800 struct elf_obj_tdata root; 801 802 /* tls_type for each local got entry. */ 803 char *local_got_tls_type; 804}; 805 806#define _bfd_tilegx_elf_tdata(abfd) \ 807 ((struct _bfd_tilegx_elf_obj_tdata *) (abfd)->tdata.any) 808 809#define _bfd_tilegx_elf_local_got_tls_type(abfd) \ 810 (_bfd_tilegx_elf_tdata (abfd)->local_got_tls_type) 811 812#define is_tilegx_elf(bfd) \ 813 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 814 && elf_tdata (bfd) != NULL \ 815 && elf_object_id (bfd) == TILEGX_ELF_DATA) 816 817#include "elf/common.h" 818#include "elf/internal.h" 819 820struct tilegx_elf_link_hash_table 821{ 822 struct elf_link_hash_table elf; 823 824 int bytes_per_word; 825 int word_align_power; 826 int bytes_per_rela; 827 int dtpmod_reloc; 828 int dtpoff_reloc; 829 int tpoff_reloc; 830 bfd_vma (*r_info) (Elf_Internal_Rela *, bfd_vma, bfd_vma); 831 bfd_vma (*r_symndx) (bfd_vma); 832 void (*put_word) (bfd *, bfd_vma, void *); 833 const char *dynamic_interpreter; 834 835 /* Whether LE transition has been disabled for some of the 836 sections. */ 837 bool disable_le_transition; 838}; 839 840 841/* Get the Tile ELF linker hash table from a link_info structure. */ 842#define tilegx_elf_hash_table(p) \ 843 ((is_elf_hash_table ((p)->hash) \ 844 && elf_hash_table_id (elf_hash_table (p)) == TILEGX_ELF_DATA) \ 845 ? (struct tilegx_elf_link_hash_table *) (p)->hash : NULL) 846 847#ifdef BFD64 848static bfd_vma 849tilegx_elf_r_info_64 (Elf_Internal_Rela *in_rel ATTRIBUTE_UNUSED, 850 bfd_vma rel_index, 851 bfd_vma type) 852{ 853 return ELF64_R_INFO (rel_index, type); 854} 855 856static bfd_vma 857tilegx_elf_r_symndx_64 (bfd_vma r_info) 858{ 859 return ELF64_R_SYM (r_info); 860} 861 862static void 863tilegx_put_word_64 (bfd *abfd, bfd_vma val, void *ptr) 864{ 865 bfd_put_64 (abfd, val, ptr); 866} 867#endif /* BFD64 */ 868 869static bfd_vma 870tilegx_elf_r_info_32 (Elf_Internal_Rela *in_rel ATTRIBUTE_UNUSED, 871 bfd_vma rel_index, 872 bfd_vma type) 873{ 874 return ELF32_R_INFO (rel_index, type); 875} 876 877static bfd_vma 878tilegx_elf_r_symndx_32 (bfd_vma r_info) 879{ 880 return ELF32_R_SYM (r_info); 881} 882 883static void 884tilegx_put_word_32 (bfd *abfd, bfd_vma val, void *ptr) 885{ 886 bfd_put_32 (abfd, val, ptr); 887} 888 889reloc_howto_type * 890tilegx_reloc_type_lookup (bfd * abfd, 891 bfd_reloc_code_real_type code) 892{ 893 unsigned int i; 894 895 for (i = ARRAY_SIZE (tilegx_reloc_map); i--;) 896 { 897 const reloc_map * entry; 898 899 entry = tilegx_reloc_map + i; 900 901 if (entry->bfd_reloc_val == code) 902 return entry->table + (entry->tilegx_reloc_val 903 - entry->table[0].type); 904 } 905 906 /* xgettext:c-format */ 907 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 908 abfd, (int) code); 909 bfd_set_error (bfd_error_bad_value); 910 return NULL; 911} 912 913reloc_howto_type * 914tilegx_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 915 const char *r_name) 916{ 917 unsigned int i; 918 919 for (i = 0; 920 i < (sizeof (tilegx_elf_howto_table) 921 / sizeof (tilegx_elf_howto_table[0])); 922 i++) 923 if (tilegx_elf_howto_table[i].name != NULL 924 && strcasecmp (tilegx_elf_howto_table[i].name, r_name) == 0) 925 return &tilegx_elf_howto_table[i]; 926 927 return NULL; 928} 929 930bool 931tilegx_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, 932 arelent *cache_ptr, 933 Elf_Internal_Rela *dst) 934{ 935 unsigned int r_type = TILEGX_ELF_R_TYPE (dst->r_info); 936 937 if (r_type <= (unsigned int) R_TILEGX_IMM8_Y1_TLS_ADD) 938 cache_ptr->howto = &tilegx_elf_howto_table [r_type]; 939 else if (r_type - R_TILEGX_GNU_VTINHERIT 940 <= ((unsigned int) R_TILEGX_GNU_VTENTRY 941 - (unsigned int) R_TILEGX_GNU_VTINHERIT)) 942 cache_ptr->howto 943 = &tilegx_elf_howto_table2 [r_type - R_TILEGX_GNU_VTINHERIT]; 944 else 945 { 946 /* xgettext:c-format */ 947 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 948 abfd, r_type); 949 bfd_set_error (bfd_error_bad_value); 950 return false; 951 } 952 return true; 953} 954 955typedef tilegx_bundle_bits (*tilegx_create_func)(int); 956 957static const tilegx_create_func reloc_to_create_func[] = 958{ 959 /* The first twenty relocation types don't correspond to operands */ 960 NULL, 961 NULL, 962 NULL, 963 NULL, 964 NULL, 965 NULL, 966 NULL, 967 NULL, 968 NULL, 969 NULL, 970 NULL, 971 NULL, 972 NULL, 973 NULL, 974 NULL, 975 NULL, 976 NULL, 977 NULL, 978 NULL, 979 NULL, 980 981 /* The remaining relocations are used for immediate operands */ 982 create_BrOff_X1, 983 create_JumpOff_X1, 984 create_JumpOff_X1, 985 create_Imm8_X0, 986 create_Imm8_Y0, 987 create_Imm8_X1, 988 create_Imm8_Y1, 989 create_Dest_Imm8_X1, 990 create_MT_Imm14_X1, 991 create_MF_Imm14_X1, 992 create_BFStart_X0, 993 create_BFEnd_X0, 994 create_ShAmt_X0, 995 create_ShAmt_X1, 996 create_ShAmt_Y0, 997 create_ShAmt_Y1, 998 create_Imm16_X0, 999 create_Imm16_X1, 1000 create_Imm16_X0, 1001 create_Imm16_X1, 1002 create_Imm16_X0, 1003 create_Imm16_X1, 1004 create_Imm16_X0, 1005 create_Imm16_X1, 1006 create_Imm16_X0, 1007 create_Imm16_X1, 1008 create_Imm16_X0, 1009 create_Imm16_X1, 1010 create_Imm16_X0, 1011 create_Imm16_X1, 1012 create_Imm16_X0, 1013 create_Imm16_X1, 1014 create_Imm16_X0, 1015 create_Imm16_X1, 1016 create_Imm16_X0, 1017 create_Imm16_X1, 1018 create_Imm16_X0, 1019 create_Imm16_X1, 1020 create_Imm16_X0, 1021 create_Imm16_X1, 1022 create_Imm16_X0, 1023 create_Imm16_X1, 1024 create_Imm16_X0, 1025 create_Imm16_X1, 1026 create_Imm16_X0, 1027 create_Imm16_X1, 1028 create_Imm16_X0, 1029 create_Imm16_X1, 1030 create_Imm16_X0, 1031 create_Imm16_X1, 1032 create_Imm16_X0, 1033 create_Imm16_X1, 1034 create_Imm16_X0, 1035 create_Imm16_X1, 1036 create_Imm16_X0, 1037 create_Imm16_X1, 1038 create_Imm16_X0, 1039 create_Imm16_X1, 1040 create_Imm16_X0, 1041 create_Imm16_X1, 1042 create_Imm16_X0, 1043 create_Imm16_X1, 1044 create_Imm16_X0, 1045 create_Imm16_X1, 1046 create_Imm16_X0, 1047 create_Imm16_X1, 1048 create_Imm16_X0, 1049 create_Imm16_X1, 1050 create_Imm16_X0, 1051 create_Imm16_X1, 1052 NULL, 1053 NULL, 1054 create_Imm16_X0, 1055 create_Imm16_X1, 1056 create_Imm16_X0, 1057 create_Imm16_X1, 1058 create_Imm16_X0, 1059 create_Imm16_X1, 1060 create_Imm16_X0, 1061 create_Imm16_X1, 1062 create_Imm16_X0, 1063 create_Imm16_X1, 1064 create_Imm16_X0, 1065 create_Imm16_X1, 1066}; 1067 1068static void 1069tilegx_elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel) 1070{ 1071 const struct elf_backend_data *bed; 1072 bfd_byte *loc; 1073 1074 bed = get_elf_backend_data (abfd); 1075 loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela); 1076 bed->s->swap_reloca_out (abfd, rel, loc); 1077} 1078 1079/* PLT/GOT stuff */ 1080 1081/* The procedure linkage table starts with the following header: 1082 1083 ld_add r28, r27, 8 1084 ld r27, r27 1085 { 1086 jr r27 1087 info 10 ## SP not offset, return PC in LR 1088 } 1089 1090 Subsequent entries are the following, jumping to the header at the end: 1091 1092 { 1093 moveli r28, <_GLOBAL_OFFSET_TABLE_ - 1f + MY_GOT_OFFSET> 1094 lnk r26 1095 } 10961: 1097 { 1098 moveli r27, <_GLOBAL_OFFSET_TABLE_ - 1b> 1099 shl16insli r28, r28, <_GLOBAL_OFFSET_TABLE_ - 1b + MY_GOT_OFFSET> 1100 } 1101 { 1102 add r28, r26, r28 1103 shl16insli r27, r27, <_GLOBAL_OFFSET_TABLE_ - 1b> 1104 } 1105 { 1106 add r27, r26, r27 1107 ld r28, r28 1108 info 10 ## SP not offset, return PC in LR 1109 } 1110 { 1111 shl16insli r29, zero, MY_PLT_INDEX 1112 jr r28 1113 } 1114 1115 This code sequence lets the code at at the start of the PLT determine 1116 which PLT entry was executed by examining 'r29'. 1117 1118 Note that MY_PLT_INDEX skips over the header entries, so the first 1119 actual jump table entry has index zero. 1120 1121 If the offset fits in 16 bits, 1122 1123 lnk r26 11241: 1125 { 1126 addli r28, r26, <_GLOBAL_OFFSET_TABLE_ - 1b + MY_GOT_OFFSET> 1127 moveli r27, <_GLOBAL_OFFSET_TABLE_ - 1b> 1128 } 1129 { 1130 shl16insli r29, zero, MY_PLT_INDEX 1131 ld r28, r28 1132 } 1133 { 1134 add r27, r26, r27 1135 jr r28 1136 } 1137 info 10 ## SP not offset, return PC in LR 1138 1139 For the purpose of backtracing, the procedure linkage table ends with the 1140 following tail entry: 1141 1142 info 10 ## SP not offset, return PC in LR 1143 1144 The 32-bit versions are similar, with ld4s replacing ld, and offsets into 1145 the GOT being multiples of 4 instead of 8. 1146 1147*/ 1148 1149#define PLT_HEADER_SIZE_IN_BUNDLES 3 1150#define PLT_ENTRY_SIZE_IN_BUNDLES 5 1151#define PLT_TAIL_SIZE_IN_BUNDLES 1 1152 1153#define PLT_HEADER_SIZE \ 1154 (PLT_HEADER_SIZE_IN_BUNDLES * TILEGX_BUNDLE_SIZE_IN_BYTES) 1155#define PLT_ENTRY_SIZE \ 1156 (PLT_ENTRY_SIZE_IN_BUNDLES * TILEGX_BUNDLE_SIZE_IN_BYTES) 1157#define PLT_TAIL_SIZE \ 1158 (PLT_TAIL_SIZE_IN_BUNDLES * TILEGX_BUNDLE_SIZE_IN_BYTES) 1159 1160#define GOT_ENTRY_SIZE(htab) TILEGX_ELF_WORD_BYTES (htab) 1161 1162#define GOTPLT_HEADER_SIZE(htab) (2 * GOT_ENTRY_SIZE (htab)) 1163 1164static const bfd_byte 1165tilegx64_plt0_entry[PLT_HEADER_SIZE] = 1166{ 1167 0x00, 0x30, 0x48, 0x51, 1168 0x6e, 0x43, 0xa0, 0x18, /* { ld_add r28, r27, 8 } */ 1169 0x00, 0x30, 0xbc, 0x35, 1170 0x00, 0x40, 0xde, 0x9e, /* { ld r27, r27 } */ 1171 0xff, 0xaf, 0x30, 0x40, 1172 0x60, 0x73, 0x6a, 0x28, /* { info 10 ; jr r27 } */ 1173}; 1174 1175static const bfd_byte 1176tilegx64_long_plt_entry[PLT_ENTRY_SIZE] = 1177{ 1178 0xdc, 0x0f, 0x00, 0x10, 1179 0x0d, 0xf0, 0x6a, 0x28, /* { moveli r28, 0 ; lnk r26 } */ 1180 0xdb, 0x0f, 0x00, 0x10, 1181 0x8e, 0x03, 0x00, 0x38, /* { moveli r27, 0 ; shl16insli r28, r28, 0 } */ 1182 0x9c, 0xc6, 0x0d, 0xd0, 1183 0x6d, 0x03, 0x00, 0x38, /* { add r28, r26, r28 ; shl16insli r27, r27, 0 } */ 1184 0x9b, 0xb6, 0xc5, 0xad, 1185 0xff, 0x57, 0xe0, 0x8e, /* { add r27, r26, r27 ; info 10 ; ld r28, r28 } */ 1186 0xdd, 0x0f, 0x00, 0x70, 1187 0x80, 0x73, 0x6a, 0x28, /* { shl16insli r29, zero, 0 ; jr r28 } */ 1188}; 1189 1190static const bfd_byte 1191tilegx64_short_plt_entry[PLT_ENTRY_SIZE] = 1192{ 1193 0x00, 0x30, 0x48, 0x51, 1194 0x0d, 0xf0, 0x6a, 0x28, /* { lnk r26 } */ 1195 0x9c, 0x06, 0x00, 0x90, 1196 0xed, 0x07, 0x00, 0x00, /* { addli r28, r26, 0 ; moveli r27, 0 } */ 1197 0xdd, 0x0f, 0x00, 0x70, 1198 0x8e, 0xeb, 0x6a, 0x28, /* { shl16insli r29, zero, 0 ; ld r28, r28 } */ 1199 0x9b, 0xb6, 0x0d, 0x50, 1200 0x80, 0x73, 0x6a, 0x28, /* { add r27, r26, r27 ; jr r28 } */ 1201 0x00, 0x30, 0x48, 0xd1, 1202 0xff, 0x57, 0x18, 0x18, /* { info 10 } */ 1203}; 1204 1205/* Reuse an existing info 10 bundle. */ 1206static const bfd_byte *const tilegx64_plt_tail_entry = 1207 &tilegx64_short_plt_entry[4 * TILEGX_BUNDLE_SIZE_IN_BYTES]; 1208 1209static const bfd_byte 1210tilegx32_plt0_entry[PLT_HEADER_SIZE] = 1211{ 1212 0x00, 0x30, 0x48, 0x51, 1213 0x6e, 0x23, 0x58, 0x18, /* { ld4s_add r28, r27, 4 } */ 1214 0x00, 0x30, 0xbc, 0x35, 1215 0x00, 0x40, 0xde, 0x9c, /* { ld4s r27, r27 } */ 1216 0xff, 0xaf, 0x30, 0x40, 1217 0x60, 0x73, 0x6a, 0x28, /* { info 10 ; jr r27 } */ 1218}; 1219 1220static const bfd_byte 1221tilegx32_long_plt_entry[PLT_ENTRY_SIZE] = 1222{ 1223 0xdc, 0x0f, 0x00, 0x10, 1224 0x0d, 0xf0, 0x6a, 0x28, /* { moveli r28, 0 ; lnk r26 } */ 1225 0xdb, 0x0f, 0x00, 0x10, 1226 0x8e, 0x03, 0x00, 0x38, /* { moveli r27, 0 ; shl16insli r28, r28, 0 } */ 1227 0x9c, 0xc6, 0x0d, 0xd0, 1228 0x6d, 0x03, 0x00, 0x38, /* { add r28, r26, r28 ; shl16insli r27, r27, 0 } */ 1229 0x9b, 0xb6, 0xc5, 0xad, 1230 0xff, 0x57, 0xe0, 0x8c, /* { add r27, r26, r27 ; info 10 ; ld4s r28, r28 } */ 1231 0xdd, 0x0f, 0x00, 0x70, 1232 0x80, 0x73, 0x6a, 0x28, /* { shl16insli r29, zero, 0 ; jr r28 } */ 1233}; 1234 1235static const bfd_byte 1236tilegx32_short_plt_entry[PLT_ENTRY_SIZE] = 1237{ 1238 0x00, 0x30, 0x48, 0x51, 1239 0x0d, 0xf0, 0x6a, 0x28, /* { lnk r26 } */ 1240 0x9c, 0x06, 0x00, 0x90, 1241 0xed, 0x07, 0x00, 0x00, /* { addli r28, r26, 0 ; moveli r27, 0 } */ 1242 0xdd, 0x0f, 0x00, 0x70, 1243 0x8e, 0x9b, 0x6a, 0x28, /* { shl16insli r29, zero, 0 ; ld4s r28, r28 } */ 1244 0x9b, 0xb6, 0x0d, 0x50, 1245 0x80, 0x73, 0x6a, 0x28, /* { add r27, r26, r27 ; jr r28 } */ 1246 0x00, 0x30, 0x48, 0xd1, 1247 0xff, 0x57, 0x18, 0x18, /* { info 10 } */ 1248}; 1249 1250/* Reuse an existing info 10 bundle. */ 1251static const bfd_byte *const tilegx32_plt_tail_entry = 1252 &tilegx64_short_plt_entry[4 * TILEGX_BUNDLE_SIZE_IN_BYTES]; 1253 1254static int 1255tilegx_plt_entry_build (bfd *output_bfd, 1256 struct tilegx_elf_link_hash_table *htab, 1257 asection *splt, asection *sgotplt, 1258 bfd_vma offset, bfd_vma *r_offset) 1259{ 1260 int plt_index = (offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; 1261 int got_offset = (plt_index * GOT_ENTRY_SIZE (htab) 1262 + GOTPLT_HEADER_SIZE (htab)); 1263 tilegx_bundle_bits *pc; 1264 1265 /* Compute the distance from the got entry to the lnk. */ 1266 bfd_signed_vma dist_got_entry = sgotplt->output_section->vma 1267 + sgotplt->output_offset 1268 + got_offset 1269 - splt->output_section->vma 1270 - splt->output_offset 1271 - offset 1272 - TILEGX_BUNDLE_SIZE_IN_BYTES; 1273 1274 /* Compute the distance to GOTPLT[0]. */ 1275 bfd_signed_vma dist_got0 = dist_got_entry - got_offset; 1276 1277 /* Check whether we can use the short plt entry with 16-bit offset. */ 1278 bool short_plt_entry = 1279 (dist_got_entry <= 0x7fff && dist_got0 >= -0x8000); 1280 1281 const tilegx_bundle_bits *plt_entry = (tilegx_bundle_bits *) 1282 (ABI_64_P (output_bfd) ? 1283 (short_plt_entry ? tilegx64_short_plt_entry : tilegx64_long_plt_entry) : 1284 (short_plt_entry ? tilegx32_short_plt_entry : tilegx32_long_plt_entry)); 1285 1286 /* Copy the plt entry template. */ 1287 memcpy (splt->contents + offset, plt_entry, PLT_ENTRY_SIZE); 1288 1289 /* Write the immediate offsets. */ 1290 pc = (tilegx_bundle_bits *)(splt->contents + offset); 1291 1292 if (short_plt_entry) 1293 { 1294 /* { lnk r28 } */ 1295 pc++; 1296 1297 /* { addli r28, r28, &GOTPLT[MY_GOT_INDEX] ; moveli r27, &GOTPLT[0] } */ 1298 *pc++ |= create_Imm16_X0 (dist_got_entry) 1299 | create_Imm16_X1 (dist_got0); 1300 1301 /* { shl16insli r29, zero, MY_PLT_INDEX ; ld r28, r28 } */ 1302 *pc++ |= create_Imm16_X0 (plt_index); 1303 } 1304 else 1305 { 1306 /* { moveli r28, &GOTPLT[MY_GOT_INDEX] ; lnk r26 } */ 1307 *pc++ |= create_Imm16_X0 (dist_got_entry >> 16); 1308 1309 /* { moveli r27, &GOTPLT[0] ; 1310 shl16insli r28, r28, &GOTPLT[MY_GOT_INDEX] } */ 1311 *pc++ |= create_Imm16_X0 (dist_got0 >> 16) 1312 | create_Imm16_X1 (dist_got_entry); 1313 1314 /* { add r28, r26, r28 ; shl16insli r27, r27, &GOTPLT[0] } */ 1315 *pc++ |= create_Imm16_X1 (dist_got0); 1316 1317 /* { add r27, r26, r27 ; info 10 ; ld r28, r28 } */ 1318 pc++; 1319 1320 /* { shl16insli r29, zero, MY_GOT_INDEX ; jr r28 } */ 1321 *pc++ |= create_Imm16_X0 (plt_index); 1322 } 1323 1324 /* Set the relocation offset. */ 1325 *r_offset = got_offset; 1326 1327 return plt_index; 1328} 1329 1330/* Create an entry in an TILEGX ELF linker hash table. */ 1331 1332static struct bfd_hash_entry * 1333link_hash_newfunc (struct bfd_hash_entry *entry, 1334 struct bfd_hash_table *table, const char *string) 1335{ 1336 /* Allocate the structure if it has not already been allocated by a 1337 subclass. */ 1338 if (entry == NULL) 1339 { 1340 entry = 1341 bfd_hash_allocate (table, 1342 sizeof (struct tilegx_elf_link_hash_entry)); 1343 if (entry == NULL) 1344 return entry; 1345 } 1346 1347 /* Call the allocation method of the superclass. */ 1348 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 1349 if (entry != NULL) 1350 { 1351 struct tilegx_elf_link_hash_entry *eh; 1352 1353 eh = (struct tilegx_elf_link_hash_entry *) entry; 1354 eh->tls_type = GOT_UNKNOWN; 1355 } 1356 1357 return entry; 1358} 1359 1360/* Create a TILEGX ELF linker hash table. */ 1361 1362struct bfd_link_hash_table * 1363tilegx_elf_link_hash_table_create (bfd *abfd) 1364{ 1365 struct tilegx_elf_link_hash_table *ret; 1366 size_t amt = sizeof (struct tilegx_elf_link_hash_table); 1367 1368 ret = (struct tilegx_elf_link_hash_table *) bfd_zmalloc (amt); 1369 if (ret == NULL) 1370 return NULL; 1371 1372#ifdef BFD64 1373 if (ABI_64_P (abfd)) 1374 { 1375 ret->bytes_per_word = 8; 1376 ret->word_align_power = 3; 1377 ret->bytes_per_rela = sizeof (Elf64_External_Rela); 1378 ret->dtpoff_reloc = R_TILEGX_TLS_DTPOFF64; 1379 ret->dtpmod_reloc = R_TILEGX_TLS_DTPMOD64; 1380 ret->tpoff_reloc = R_TILEGX_TLS_TPOFF64; 1381 ret->r_info = tilegx_elf_r_info_64; 1382 ret->r_symndx = tilegx_elf_r_symndx_64; 1383 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; 1384 ret->put_word = tilegx_put_word_64; 1385 } 1386 else 1387#endif 1388 { 1389 ret->bytes_per_word = 4; 1390 ret->word_align_power = 2; 1391 ret->bytes_per_rela = sizeof (Elf32_External_Rela); 1392 ret->dtpoff_reloc = R_TILEGX_TLS_DTPOFF32; 1393 ret->dtpmod_reloc = R_TILEGX_TLS_DTPMOD32; 1394 ret->tpoff_reloc = R_TILEGX_TLS_TPOFF32; 1395 ret->r_info = tilegx_elf_r_info_32; 1396 ret->r_symndx = tilegx_elf_r_symndx_32; 1397 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; 1398 ret->put_word = tilegx_put_word_32; 1399 } 1400 1401 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, 1402 sizeof (struct tilegx_elf_link_hash_entry), 1403 TILEGX_ELF_DATA)) 1404 { 1405 free (ret); 1406 return NULL; 1407 } 1408 1409 return &ret->elf.root; 1410} 1411 1412/* Create the .got section. */ 1413 1414static bool 1415tilegx_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) 1416{ 1417 flagword flags; 1418 asection *s, *s_got; 1419 struct elf_link_hash_entry *h; 1420 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 1421 struct elf_link_hash_table *htab = elf_hash_table (info); 1422 1423 /* This function may be called more than once. */ 1424 if (htab->sgot != NULL) 1425 return true; 1426 1427 flags = bed->dynamic_sec_flags; 1428 1429 s = bfd_make_section_anyway_with_flags (abfd, 1430 (bed->rela_plts_and_copies_p 1431 ? ".rela.got" : ".rel.got"), 1432 (bed->dynamic_sec_flags 1433 | SEC_READONLY)); 1434 if (s == NULL 1435 || !bfd_set_section_alignment (s, bed->s->log_file_align)) 1436 return false; 1437 htab->srelgot = s; 1438 1439 s = s_got = bfd_make_section_anyway_with_flags (abfd, ".got", flags); 1440 if (s == NULL 1441 || !bfd_set_section_alignment (s, bed->s->log_file_align)) 1442 return false; 1443 htab->sgot = s; 1444 1445 /* The first bit of the global offset table is the header. */ 1446 s->size += bed->got_header_size; 1447 1448 if (bed->want_got_plt) 1449 { 1450 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); 1451 if (s == NULL 1452 || !bfd_set_section_alignment (s, bed->s->log_file_align)) 1453 return false; 1454 htab->sgotplt = s; 1455 1456 /* Reserve room for the header. */ 1457 s->size += GOTPLT_HEADER_SIZE (tilegx_elf_hash_table (info)); 1458 } 1459 1460 if (bed->want_got_sym) 1461 { 1462 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got 1463 section. We don't do this in the linker script because we don't want 1464 to define the symbol if we are not creating a global offset 1465 table. */ 1466 h = _bfd_elf_define_linkage_sym (abfd, info, s_got, 1467 "_GLOBAL_OFFSET_TABLE_"); 1468 elf_hash_table (info)->hgot = h; 1469 if (h == NULL) 1470 return false; 1471 } 1472 1473 return true; 1474} 1475 1476/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and 1477 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our 1478 hash table. */ 1479 1480bool 1481tilegx_elf_create_dynamic_sections (bfd *dynobj, 1482 struct bfd_link_info *info) 1483{ 1484 if (!tilegx_elf_create_got_section (dynobj, info)) 1485 return false; 1486 1487 return _bfd_elf_create_dynamic_sections (dynobj, info); 1488} 1489 1490/* Copy the extra info we tack onto an elf_link_hash_entry. */ 1491 1492void 1493tilegx_elf_copy_indirect_symbol (struct bfd_link_info *info, 1494 struct elf_link_hash_entry *dir, 1495 struct elf_link_hash_entry *ind) 1496{ 1497 struct tilegx_elf_link_hash_entry *edir, *eind; 1498 1499 edir = (struct tilegx_elf_link_hash_entry *) dir; 1500 eind = (struct tilegx_elf_link_hash_entry *) ind; 1501 1502 if (ind->root.type == bfd_link_hash_indirect 1503 && dir->got.refcount <= 0) 1504 { 1505 edir->tls_type = eind->tls_type; 1506 eind->tls_type = GOT_UNKNOWN; 1507 } 1508 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 1509} 1510 1511static int 1512tilegx_tls_translate_to_le (int r_type) 1513{ 1514 switch (r_type) 1515 { 1516 case R_TILEGX_IMM16_X0_HW0_TLS_GD: 1517 case R_TILEGX_IMM16_X0_HW0_TLS_IE: 1518 return R_TILEGX_IMM16_X0_HW0_TLS_LE; 1519 1520 case R_TILEGX_IMM16_X1_HW0_TLS_GD: 1521 case R_TILEGX_IMM16_X1_HW0_TLS_IE: 1522 return R_TILEGX_IMM16_X1_HW0_TLS_LE; 1523 1524 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD: 1525 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE: 1526 return R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE; 1527 1528 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD: 1529 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE: 1530 return R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE; 1531 1532 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD: 1533 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE: 1534 return R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE; 1535 1536 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD: 1537 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE: 1538 return R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE; 1539 } 1540 return r_type; 1541} 1542 1543static int 1544tilegx_tls_translate_to_ie (int r_type) 1545{ 1546 switch (r_type) 1547 { 1548 case R_TILEGX_IMM16_X0_HW0_TLS_GD: 1549 case R_TILEGX_IMM16_X0_HW0_TLS_IE: 1550 return R_TILEGX_IMM16_X0_HW0_TLS_IE; 1551 1552 case R_TILEGX_IMM16_X1_HW0_TLS_GD: 1553 case R_TILEGX_IMM16_X1_HW0_TLS_IE: 1554 return R_TILEGX_IMM16_X1_HW0_TLS_IE; 1555 1556 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD: 1557 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE: 1558 return R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE; 1559 1560 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD: 1561 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE: 1562 return R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE; 1563 1564 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD: 1565 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE: 1566 return R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE; 1567 1568 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD: 1569 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE: 1570 return R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE; 1571 } 1572 return r_type; 1573} 1574 1575static int 1576tilegx_elf_tls_transition (struct bfd_link_info *info, int r_type, 1577 int is_local, bool disable_le_transition) 1578{ 1579 if (!bfd_link_executable (info)) 1580 return r_type; 1581 1582 if (is_local && !disable_le_transition) 1583 return tilegx_tls_translate_to_le (r_type); 1584 else 1585 return tilegx_tls_translate_to_ie (r_type); 1586} 1587 1588/* Look through the relocs for a section during the first phase, and 1589 allocate space in the global offset table or procedure linkage 1590 table. */ 1591 1592bool 1593tilegx_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, 1594 asection *sec, const Elf_Internal_Rela *relocs) 1595{ 1596 struct tilegx_elf_link_hash_table *htab; 1597 Elf_Internal_Shdr *symtab_hdr; 1598 struct elf_link_hash_entry **sym_hashes; 1599 const Elf_Internal_Rela *rel; 1600 const Elf_Internal_Rela *rel_end; 1601 asection *sreloc; 1602 int num_relocs; 1603 bool has_tls_gd_or_ie = false, has_tls_add = false; 1604 1605 if (bfd_link_relocatable (info)) 1606 return true; 1607 1608 htab = tilegx_elf_hash_table (info); 1609 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1610 sym_hashes = elf_sym_hashes (abfd); 1611 1612 sreloc = NULL; 1613 1614 num_relocs = sec->reloc_count; 1615 1616 BFD_ASSERT (is_tilegx_elf (abfd) || num_relocs == 0); 1617 1618 if (htab->elf.dynobj == NULL) 1619 htab->elf.dynobj = abfd; 1620 1621 rel_end = relocs + num_relocs; 1622 1623 /* Check whether to do optimization to transform TLS GD/IE 1624 referehces to TLS LE. We disable it if we're linking with old 1625 TLS code sequences that do not support such optimization. Old 1626 TLS code sequences have tls_gd_call/tls_ie_load relocations but 1627 no tls_add relocations. */ 1628 for (rel = relocs; rel < rel_end && !has_tls_add; rel++) 1629 { 1630 int r_type = TILEGX_ELF_R_TYPE (rel->r_info); 1631 switch (r_type) 1632 { 1633 case R_TILEGX_TLS_GD_CALL: 1634 case R_TILEGX_TLS_IE_LOAD: 1635 has_tls_gd_or_ie = true; 1636 break; 1637 case R_TILEGX_IMM8_X0_TLS_ADD: 1638 case R_TILEGX_IMM8_Y0_TLS_ADD: 1639 case R_TILEGX_IMM8_X1_TLS_ADD: 1640 case R_TILEGX_IMM8_Y1_TLS_ADD: 1641 has_tls_add = true; 1642 break; 1643 } 1644 } 1645 1646 sec->sec_flg0 = (has_tls_gd_or_ie && !has_tls_add); 1647 htab->disable_le_transition |= sec->sec_flg0; 1648 1649 for (rel = relocs; rel < rel_end; rel++) 1650 { 1651 unsigned int r_type; 1652 unsigned int r_symndx; 1653 struct elf_link_hash_entry *h; 1654 int tls_type; 1655 1656 r_symndx = TILEGX_ELF_R_SYMNDX (htab, rel->r_info); 1657 r_type = TILEGX_ELF_R_TYPE (rel->r_info); 1658 1659 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) 1660 { 1661 /* xgettext:c-format */ 1662 _bfd_error_handler (_("%pB: bad symbol index: %d"), 1663 abfd, r_symndx); 1664 return false; 1665 } 1666 1667 if (r_symndx < symtab_hdr->sh_info) 1668 h = NULL; 1669 else 1670 { 1671 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1672 while (h->root.type == bfd_link_hash_indirect 1673 || h->root.type == bfd_link_hash_warning) 1674 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1675 } 1676 1677 r_type = tilegx_elf_tls_transition (info, r_type, h == NULL, 1678 sec->sec_flg0); 1679 switch (r_type) 1680 { 1681 case R_TILEGX_IMM16_X0_HW0_TLS_LE: 1682 case R_TILEGX_IMM16_X1_HW0_TLS_LE: 1683 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE: 1684 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE: 1685 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE: 1686 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE: 1687 if (!bfd_link_executable (info)) 1688 goto r_tilegx_plt32; 1689 break; 1690 1691 case R_TILEGX_IMM16_X0_HW0_TLS_GD: 1692 case R_TILEGX_IMM16_X1_HW0_TLS_GD: 1693 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD: 1694 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD: 1695 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD: 1696 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD: 1697 BFD_ASSERT (bfd_link_pic (info)); 1698 tls_type = GOT_TLS_GD; 1699 goto have_got_reference; 1700 1701 case R_TILEGX_IMM16_X0_HW0_TLS_IE: 1702 case R_TILEGX_IMM16_X1_HW0_TLS_IE: 1703 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE: 1704 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE: 1705 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE: 1706 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE: 1707 tls_type = GOT_TLS_IE; 1708 if (!bfd_link_executable (info)) 1709 info->flags |= DF_STATIC_TLS; 1710 goto have_got_reference; 1711 1712 case R_TILEGX_IMM16_X0_HW0_GOT: 1713 case R_TILEGX_IMM16_X1_HW0_GOT: 1714 case R_TILEGX_IMM16_X0_HW0_LAST_GOT: 1715 case R_TILEGX_IMM16_X1_HW0_LAST_GOT: 1716 case R_TILEGX_IMM16_X0_HW1_LAST_GOT: 1717 case R_TILEGX_IMM16_X1_HW1_LAST_GOT: 1718 tls_type = GOT_NORMAL; 1719 /* Fall Through */ 1720 1721 have_got_reference: 1722 /* This symbol requires a global offset table entry. */ 1723 { 1724 int old_tls_type; 1725 1726 if (h != NULL) 1727 { 1728 h->got.refcount += 1; 1729 old_tls_type = tilegx_elf_hash_entry(h)->tls_type; 1730 } 1731 else 1732 { 1733 bfd_signed_vma *local_got_refcounts; 1734 1735 /* This is a global offset table entry for a local symbol. */ 1736 local_got_refcounts = elf_local_got_refcounts (abfd); 1737 if (local_got_refcounts == NULL) 1738 { 1739 bfd_size_type size; 1740 1741 size = symtab_hdr->sh_info; 1742 size *= (sizeof (bfd_signed_vma) + sizeof(char)); 1743 local_got_refcounts = ((bfd_signed_vma *) 1744 bfd_zalloc (abfd, size)); 1745 if (local_got_refcounts == NULL) 1746 return false; 1747 elf_local_got_refcounts (abfd) = local_got_refcounts; 1748 _bfd_tilegx_elf_local_got_tls_type (abfd) 1749 = (char *) (local_got_refcounts + symtab_hdr->sh_info); 1750 } 1751 local_got_refcounts[r_symndx] += 1; 1752 old_tls_type = _bfd_tilegx_elf_local_got_tls_type (abfd) [r_symndx]; 1753 } 1754 1755 /* If a TLS symbol is accessed using IE at least once, 1756 there is no point to use dynamic model for it. */ 1757 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN 1758 && (old_tls_type != GOT_TLS_GD 1759 || tls_type != GOT_TLS_IE)) 1760 { 1761 if (old_tls_type == GOT_TLS_IE && tls_type == GOT_TLS_GD) 1762 tls_type = old_tls_type; 1763 else 1764 { 1765 _bfd_error_handler 1766 /* xgettext:c-format */ 1767 (_("%pB: `%s' accessed both as normal and thread local symbol"), 1768 abfd, h ? h->root.root.string : "<local>"); 1769 return false; 1770 } 1771 } 1772 1773 if (old_tls_type != tls_type) 1774 { 1775 if (h != NULL) 1776 tilegx_elf_hash_entry (h)->tls_type = tls_type; 1777 else 1778 _bfd_tilegx_elf_local_got_tls_type (abfd) [r_symndx] = tls_type; 1779 } 1780 } 1781 1782 if (htab->elf.sgot == NULL) 1783 { 1784 if (!tilegx_elf_create_got_section (htab->elf.dynobj, info)) 1785 return false; 1786 } 1787 break; 1788 1789 case R_TILEGX_TLS_GD_CALL: 1790 if (!bfd_link_executable (info)) 1791 { 1792 /* These are basically R_TILEGX_JUMPOFF_X1_PLT relocs 1793 against __tls_get_addr. */ 1794 struct bfd_link_hash_entry *bh = NULL; 1795 if (! _bfd_generic_link_add_one_symbol (info, abfd, 1796 "__tls_get_addr", 0, 1797 bfd_und_section_ptr, 0, 1798 NULL, false, false, 1799 &bh)) 1800 return false; 1801 h = (struct elf_link_hash_entry *) bh; 1802 } 1803 else 1804 break; 1805 /* Fall through */ 1806 1807 case R_TILEGX_JUMPOFF_X1_PLT: 1808 case R_TILEGX_IMM16_X0_HW0_PLT_PCREL: 1809 case R_TILEGX_IMM16_X1_HW0_PLT_PCREL: 1810 case R_TILEGX_IMM16_X0_HW1_PLT_PCREL: 1811 case R_TILEGX_IMM16_X1_HW1_PLT_PCREL: 1812 case R_TILEGX_IMM16_X0_HW2_PLT_PCREL: 1813 case R_TILEGX_IMM16_X1_HW2_PLT_PCREL: 1814 case R_TILEGX_IMM16_X0_HW3_PLT_PCREL: 1815 case R_TILEGX_IMM16_X1_HW3_PLT_PCREL: 1816 case R_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL: 1817 case R_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL: 1818 case R_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL: 1819 case R_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL: 1820 case R_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL: 1821 case R_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL: 1822 /* This symbol requires a procedure linkage table entry. We 1823 actually build the entry in adjust_dynamic_symbol, 1824 because this might be a case of linking PIC code without 1825 linking in any dynamic objects, in which case we don't 1826 need to generate a procedure linkage table after all. */ 1827 1828 if (h != NULL) 1829 { 1830 h->needs_plt = 1; 1831 h->plt.refcount += 1; 1832 } 1833 break; 1834 1835 case R_TILEGX_64_PCREL: 1836 case R_TILEGX_32_PCREL: 1837 case R_TILEGX_16_PCREL: 1838 case R_TILEGX_8_PCREL: 1839 case R_TILEGX_IMM16_X0_HW0_PCREL: 1840 case R_TILEGX_IMM16_X1_HW0_PCREL: 1841 case R_TILEGX_IMM16_X0_HW1_PCREL: 1842 case R_TILEGX_IMM16_X1_HW1_PCREL: 1843 case R_TILEGX_IMM16_X0_HW2_PCREL: 1844 case R_TILEGX_IMM16_X1_HW2_PCREL: 1845 case R_TILEGX_IMM16_X0_HW3_PCREL: 1846 case R_TILEGX_IMM16_X1_HW3_PCREL: 1847 case R_TILEGX_IMM16_X0_HW0_LAST_PCREL: 1848 case R_TILEGX_IMM16_X1_HW0_LAST_PCREL: 1849 case R_TILEGX_IMM16_X0_HW1_LAST_PCREL: 1850 case R_TILEGX_IMM16_X1_HW1_LAST_PCREL: 1851 case R_TILEGX_IMM16_X0_HW2_LAST_PCREL: 1852 case R_TILEGX_IMM16_X1_HW2_LAST_PCREL: 1853 if (h != NULL) 1854 h->non_got_ref = 1; 1855 1856 if (h != NULL 1857 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 1858 break; 1859 /* Fall through. */ 1860 1861 case R_TILEGX_64: 1862 case R_TILEGX_32: 1863 case R_TILEGX_16: 1864 case R_TILEGX_8: 1865 case R_TILEGX_HW0: 1866 case R_TILEGX_HW1: 1867 case R_TILEGX_HW2: 1868 case R_TILEGX_HW3: 1869 case R_TILEGX_HW0_LAST: 1870 case R_TILEGX_HW1_LAST: 1871 case R_TILEGX_HW2_LAST: 1872 case R_TILEGX_COPY: 1873 case R_TILEGX_GLOB_DAT: 1874 case R_TILEGX_JMP_SLOT: 1875 case R_TILEGX_RELATIVE: 1876 case R_TILEGX_BROFF_X1: 1877 case R_TILEGX_JUMPOFF_X1: 1878 case R_TILEGX_IMM8_X0: 1879 case R_TILEGX_IMM8_Y0: 1880 case R_TILEGX_IMM8_X1: 1881 case R_TILEGX_IMM8_Y1: 1882 case R_TILEGX_DEST_IMM8_X1: 1883 case R_TILEGX_MT_IMM14_X1: 1884 case R_TILEGX_MF_IMM14_X1: 1885 case R_TILEGX_MMSTART_X0: 1886 case R_TILEGX_MMEND_X0: 1887 case R_TILEGX_SHAMT_X0: 1888 case R_TILEGX_SHAMT_X1: 1889 case R_TILEGX_SHAMT_Y0: 1890 case R_TILEGX_SHAMT_Y1: 1891 case R_TILEGX_IMM16_X0_HW0: 1892 case R_TILEGX_IMM16_X1_HW0: 1893 case R_TILEGX_IMM16_X0_HW1: 1894 case R_TILEGX_IMM16_X1_HW1: 1895 case R_TILEGX_IMM16_X0_HW2: 1896 case R_TILEGX_IMM16_X1_HW2: 1897 case R_TILEGX_IMM16_X0_HW3: 1898 case R_TILEGX_IMM16_X1_HW3: 1899 case R_TILEGX_IMM16_X0_HW0_LAST: 1900 case R_TILEGX_IMM16_X1_HW0_LAST: 1901 case R_TILEGX_IMM16_X0_HW1_LAST: 1902 case R_TILEGX_IMM16_X1_HW1_LAST: 1903 case R_TILEGX_IMM16_X0_HW2_LAST: 1904 case R_TILEGX_IMM16_X1_HW2_LAST: 1905 if (h != NULL) 1906 h->non_got_ref = 1; 1907 1908 r_tilegx_plt32: 1909 if (h != NULL && !bfd_link_pic (info)) 1910 { 1911 /* We may need a .plt entry if the function this reloc 1912 refers to is in a shared lib. */ 1913 h->plt.refcount += 1; 1914 } 1915 1916 /* If we are creating a shared library, and this is a reloc 1917 against a global symbol, or a non PC relative reloc 1918 against a local symbol, then we need to copy the reloc 1919 into the shared library. However, if we are linking with 1920 -Bsymbolic, we do not need to copy a reloc against a 1921 global symbol which is defined in an object we are 1922 including in the link (i.e., DEF_REGULAR is set). At 1923 this point we have not seen all the input files, so it is 1924 possible that DEF_REGULAR is not set now but will be set 1925 later (it is never cleared). In case of a weak definition, 1926 DEF_REGULAR may be cleared later by a strong definition in 1927 a shared library. We account for that possibility below by 1928 storing information in the relocs_copied field of the hash 1929 table entry. A similar situation occurs when creating 1930 shared libraries and symbol visibility changes render the 1931 symbol local. 1932 1933 If on the other hand, we are creating an executable, we 1934 may need to keep relocations for symbols satisfied by a 1935 dynamic library if we manage to avoid copy relocs for the 1936 symbol. */ 1937 if ((bfd_link_pic (info) 1938 && (sec->flags & SEC_ALLOC) != 0 1939 && (! tilegx_elf_howto_table[r_type].pc_relative 1940 || (h != NULL 1941 && (! info->symbolic 1942 || h->root.type == bfd_link_hash_defweak 1943 || !h->def_regular)))) 1944 || (!bfd_link_pic (info) 1945 && (sec->flags & SEC_ALLOC) != 0 1946 && h != NULL 1947 && (h->root.type == bfd_link_hash_defweak 1948 || !h->def_regular))) 1949 { 1950 struct elf_dyn_relocs *p; 1951 struct elf_dyn_relocs **head; 1952 1953 /* When creating a shared object, we must copy these 1954 relocs into the output file. We create a reloc 1955 section in dynobj and make room for the reloc. */ 1956 if (sreloc == NULL) 1957 { 1958 sreloc = _bfd_elf_make_dynamic_reloc_section 1959 (sec, htab->elf.dynobj, htab->word_align_power, abfd, 1960 /*rela?*/ true); 1961 1962 if (sreloc == NULL) 1963 return false; 1964 } 1965 1966 /* If this is a global symbol, we count the number of 1967 relocations we need for this symbol. */ 1968 if (h != NULL) 1969 head = &h->dyn_relocs; 1970 else 1971 { 1972 /* Track dynamic relocs needed for local syms too. 1973 We really need local syms available to do this 1974 easily. Oh well. */ 1975 1976 asection *s; 1977 void *vpp; 1978 Elf_Internal_Sym *isym; 1979 1980 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, 1981 abfd, r_symndx); 1982 if (isym == NULL) 1983 return false; 1984 1985 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 1986 if (s == NULL) 1987 s = sec; 1988 1989 vpp = &elf_section_data (s)->local_dynrel; 1990 head = (struct elf_dyn_relocs **) vpp; 1991 } 1992 1993 p = *head; 1994 if (p == NULL || p->sec != sec) 1995 { 1996 size_t amt = sizeof *p; 1997 p = ((struct elf_dyn_relocs *) 1998 bfd_alloc (htab->elf.dynobj, amt)); 1999 if (p == NULL) 2000 return false; 2001 p->next = *head; 2002 *head = p; 2003 p->sec = sec; 2004 p->count = 0; 2005 p->pc_count = 0; 2006 } 2007 2008 p->count += 1; 2009 if (tilegx_elf_howto_table[r_type].pc_relative) 2010 p->pc_count += 1; 2011 } 2012 2013 break; 2014 2015 case R_TILEGX_GNU_VTINHERIT: 2016 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 2017 return false; 2018 break; 2019 2020 case R_TILEGX_GNU_VTENTRY: 2021 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 2022 return false; 2023 break; 2024 2025 default: 2026 break; 2027 } 2028 } 2029 2030 return true; 2031} 2032 2033 2034asection * 2035tilegx_elf_gc_mark_hook (asection *sec, 2036 struct bfd_link_info *info, 2037 Elf_Internal_Rela *rel, 2038 struct elf_link_hash_entry *h, 2039 Elf_Internal_Sym *sym) 2040{ 2041 if (h != NULL) 2042 { 2043 switch (TILEGX_ELF_R_TYPE (rel->r_info)) 2044 { 2045 case R_TILEGX_GNU_VTINHERIT: 2046 case R_TILEGX_GNU_VTENTRY: 2047 return NULL; 2048 } 2049 } 2050 2051 /* FIXME: The test here, in check_relocs and in relocate_section 2052 dealing with TLS optimization, ought to be !bfd_link_executable (info). */ 2053 if (bfd_link_pic (info)) 2054 { 2055 struct bfd_link_hash_entry *bh; 2056 2057 switch (TILEGX_ELF_R_TYPE (rel->r_info)) 2058 { 2059 case R_TILEGX_TLS_GD_CALL: 2060 /* This reloc implicitly references __tls_get_addr. We know 2061 another reloc will reference the same symbol as the one 2062 on this reloc, so the real symbol and section will be 2063 gc marked when processing the other reloc. That lets 2064 us handle __tls_get_addr here. */ 2065 bh = NULL; 2066 if (! _bfd_generic_link_add_one_symbol (info, sec->owner, 2067 "__tls_get_addr", 0, 2068 bfd_und_section_ptr, 2069 0, NULL, false, 2070 false, &bh)) 2071 return NULL; 2072 h = (struct elf_link_hash_entry *) bh; 2073 BFD_ASSERT (h != NULL); 2074 h->mark = 1; 2075 if (h->is_weakalias) 2076 weakdef (h)->mark = 1; 2077 sym = NULL; 2078 } 2079 } 2080 2081 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 2082} 2083 2084/* Adjust a symbol defined by a dynamic object and referenced by a 2085 regular object. The current definition is in some section of the 2086 dynamic object, but we're not including those sections. We have to 2087 change the definition to something the rest of the link can 2088 understand. */ 2089 2090bool 2091tilegx_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 2092 struct elf_link_hash_entry *h) 2093{ 2094 struct tilegx_elf_link_hash_table *htab; 2095 bfd *dynobj; 2096 asection *s, *srel; 2097 2098 htab = tilegx_elf_hash_table (info); 2099 BFD_ASSERT (htab != NULL); 2100 2101 dynobj = htab->elf.dynobj; 2102 2103 /* Make sure we know what is going on here. */ 2104 BFD_ASSERT (dynobj != NULL 2105 && (h->needs_plt 2106 || h->is_weakalias 2107 || (h->def_dynamic 2108 && h->ref_regular 2109 && !h->def_regular))); 2110 2111 /* If this is a function, put it in the procedure linkage table. We 2112 will fill in the contents of the procedure linkage table later 2113 (although we could actually do it here). */ 2114 if (h->type == STT_FUNC || h->needs_plt) 2115 { 2116 if (h->plt.refcount <= 0 2117 || SYMBOL_CALLS_LOCAL (info, h) 2118 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 2119 && h->root.type == bfd_link_hash_undefweak)) 2120 { 2121 /* This case can occur if we saw a R_TILEGX_JUMPOFF_X1_PLT 2122 reloc in an input file, but the symbol was never referred 2123 to by a dynamic object, or if all references were garbage 2124 collected. In such a case, we don't actually need to build 2125 a procedure linkage table, and we can just do a 2126 R_TILEGX_JUMPOFF_X1 relocation instead. */ 2127 h->plt.offset = (bfd_vma) -1; 2128 h->needs_plt = 0; 2129 } 2130 2131 return true; 2132 } 2133 else 2134 h->plt.offset = (bfd_vma) -1; 2135 2136 /* If this is a weak symbol, and there is a real definition, the 2137 processor independent code will have arranged for us to see the 2138 real definition first, and we can just use the same value. */ 2139 if (h->is_weakalias) 2140 { 2141 struct elf_link_hash_entry *def = weakdef (h); 2142 BFD_ASSERT (def->root.type == bfd_link_hash_defined); 2143 h->root.u.def.section = def->root.u.def.section; 2144 h->root.u.def.value = def->root.u.def.value; 2145 return true; 2146 } 2147 2148 /* This is a reference to a symbol defined by a dynamic object which 2149 is not a function. */ 2150 2151 /* If we are creating a shared library, we must presume that the 2152 only references to the symbol are via the global offset table. 2153 For such cases we need not do anything here; the relocations will 2154 be handled correctly by relocate_section. */ 2155 if (bfd_link_pic (info)) 2156 return true; 2157 2158 /* If there are no references to this symbol that do not use the 2159 GOT, we don't need to generate a copy reloc. */ 2160 if (!h->non_got_ref) 2161 return true; 2162 2163 /* If -z nocopyreloc was given, we won't generate them either. */ 2164 if (info->nocopyreloc) 2165 { 2166 h->non_got_ref = 0; 2167 return true; 2168 } 2169 2170 /* If we don't find any dynamic relocs in read-only sections, then 2171 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 2172 if (!_bfd_elf_readonly_dynrelocs (h)) 2173 { 2174 h->non_got_ref = 0; 2175 return true; 2176 } 2177 2178 /* We must allocate the symbol in our .dynbss section, which will 2179 become part of the .bss section of the executable. There will be 2180 an entry for this symbol in the .dynsym section. The dynamic 2181 object will contain position independent code, so all references 2182 from the dynamic object to this symbol will go through the global 2183 offset table. The dynamic linker will use the .dynsym entry to 2184 determine the address it must put in the global offset table, so 2185 both the dynamic object and the regular object will refer to the 2186 same memory location for the variable. */ 2187 2188 /* We must generate a R_TILEGX_COPY reloc to tell the dynamic linker 2189 to copy the initial value out of the dynamic object and into the 2190 runtime process image. We need to remember the offset into the 2191 .rel.bss section we are going to use. */ 2192 if ((h->root.u.def.section->flags & SEC_READONLY) != 0) 2193 { 2194 s = htab->elf.sdynrelro; 2195 srel = htab->elf.sreldynrelro; 2196 } 2197 else 2198 { 2199 s = htab->elf.sdynbss; 2200 srel = htab->elf.srelbss; 2201 } 2202 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 2203 { 2204 srel->size += TILEGX_ELF_RELA_BYTES (htab); 2205 h->needs_copy = 1; 2206 } 2207 2208 return _bfd_elf_adjust_dynamic_copy (info, h, s); 2209} 2210 2211/* Allocate space in .plt, .got and associated reloc sections for 2212 dynamic relocs. */ 2213 2214static bool 2215allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) 2216{ 2217 struct bfd_link_info *info; 2218 struct tilegx_elf_link_hash_table *htab; 2219 struct elf_dyn_relocs *p; 2220 2221 if (h->root.type == bfd_link_hash_indirect) 2222 return true; 2223 2224 info = (struct bfd_link_info *) inf; 2225 htab = tilegx_elf_hash_table (info); 2226 BFD_ASSERT (htab != NULL); 2227 2228 if (htab->elf.dynamic_sections_created 2229 && h->plt.refcount > 0) 2230 { 2231 /* Make sure this symbol is output as a dynamic symbol. 2232 Undefined weak syms won't yet be marked as dynamic. */ 2233 if (h->dynindx == -1 2234 && !h->forced_local) 2235 { 2236 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2237 return false; 2238 } 2239 2240 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) 2241 { 2242 asection *s = htab->elf.splt; 2243 2244 /* Allocate room for the header and tail. */ 2245 if (s->size == 0) 2246 { 2247 s->size = PLT_ENTRY_SIZE; 2248 } 2249 2250 h->plt.offset = s->size - PLT_ENTRY_SIZE + PLT_HEADER_SIZE; 2251 2252 /* If this symbol is not defined in a regular file, and we are 2253 not generating a shared library, then set the symbol to this 2254 location in the .plt. This is required to make function 2255 pointers compare as equal between the normal executable and 2256 the shared library. */ 2257 if (! bfd_link_pic (info) 2258 && !h->def_regular) 2259 { 2260 h->root.u.def.section = s; 2261 h->root.u.def.value = h->plt.offset; 2262 } 2263 2264 /* Make room for this entry. */ 2265 s->size += PLT_ENTRY_SIZE; 2266 2267 /* We also need to make an entry in the .got.plt section. */ 2268 htab->elf.sgotplt->size += GOT_ENTRY_SIZE (htab); 2269 2270 /* We also need to make an entry in the .rela.plt section. */ 2271 htab->elf.srelplt->size += TILEGX_ELF_RELA_BYTES (htab); 2272 } 2273 else 2274 { 2275 h->plt.offset = (bfd_vma) -1; 2276 h->needs_plt = 0; 2277 } 2278 } 2279 else 2280 { 2281 h->plt.offset = (bfd_vma) -1; 2282 h->needs_plt = 0; 2283 } 2284 2285 /* If a TLS_IE symbol is now local to the binary, make it a TLS_LE 2286 requiring no TLS entry. */ 2287 if (h->got.refcount > 0 2288 && !htab->disable_le_transition 2289 && bfd_link_executable (info) 2290 && h->dynindx == -1 2291 && tilegx_elf_hash_entry(h)->tls_type == GOT_TLS_IE) 2292 h->got.offset = (bfd_vma) -1; 2293 else if (h->got.refcount > 0) 2294 { 2295 asection *s; 2296 bool dyn; 2297 int tls_type = tilegx_elf_hash_entry(h)->tls_type; 2298 2299 /* Make sure this symbol is output as a dynamic symbol. 2300 Undefined weak syms won't yet be marked as dynamic. */ 2301 if (h->dynindx == -1 2302 && !h->forced_local) 2303 { 2304 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2305 return false; 2306 } 2307 2308 s = htab->elf.sgot; 2309 h->got.offset = s->size; 2310 s->size += TILEGX_ELF_WORD_BYTES (htab); 2311 /* TLS_GD entries need 2 consecutive GOT slots. */ 2312 if (tls_type == GOT_TLS_GD) 2313 s->size += TILEGX_ELF_WORD_BYTES (htab); 2314 dyn = htab->elf.dynamic_sections_created; 2315 /* TLS_IE needs one dynamic relocation, 2316 TLS_GD needs two if local symbol and two if global. */ 2317 if (tls_type == GOT_TLS_GD || tls_type == GOT_TLS_IE) 2318 htab->elf.srelgot->size += 2 * TILEGX_ELF_RELA_BYTES (htab); 2319 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 2320 bfd_link_pic (info), 2321 h)) 2322 htab->elf.srelgot->size += TILEGX_ELF_RELA_BYTES (htab); 2323 } 2324 else 2325 h->got.offset = (bfd_vma) -1; 2326 2327 if (h->dyn_relocs == NULL) 2328 return true; 2329 2330 /* In the shared -Bsymbolic case, discard space allocated for 2331 dynamic pc-relative relocs against symbols which turn out to be 2332 defined in regular objects. For the normal shared case, discard 2333 space for pc-relative relocs that have become local due to symbol 2334 visibility changes. */ 2335 2336 if (bfd_link_pic (info)) 2337 { 2338 if (SYMBOL_CALLS_LOCAL (info, h)) 2339 { 2340 struct elf_dyn_relocs **pp; 2341 2342 for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) 2343 { 2344 p->count -= p->pc_count; 2345 p->pc_count = 0; 2346 if (p->count == 0) 2347 *pp = p->next; 2348 else 2349 pp = &p->next; 2350 } 2351 } 2352 2353 /* Also discard relocs on undefined weak syms with non-default 2354 visibility. */ 2355 if (h->dyn_relocs != NULL 2356 && h->root.type == bfd_link_hash_undefweak) 2357 { 2358 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 2359 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 2360 h->dyn_relocs = NULL; 2361 2362 /* Make sure undefined weak symbols are output as a dynamic 2363 symbol in PIEs. */ 2364 else if (h->dynindx == -1 2365 && !h->forced_local) 2366 { 2367 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2368 return false; 2369 } 2370 } 2371 } 2372 else 2373 { 2374 /* For the non-shared case, discard space for relocs against 2375 symbols which turn out to need copy relocs or are not 2376 dynamic. */ 2377 2378 if (!h->non_got_ref 2379 && ((h->def_dynamic 2380 && !h->def_regular) 2381 || (htab->elf.dynamic_sections_created 2382 && (h->root.type == bfd_link_hash_undefweak 2383 || h->root.type == bfd_link_hash_undefined)))) 2384 { 2385 /* Make sure this symbol is output as a dynamic symbol. 2386 Undefined weak syms won't yet be marked as dynamic. */ 2387 if (h->dynindx == -1 2388 && !h->forced_local) 2389 { 2390 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2391 return false; 2392 } 2393 2394 /* If that succeeded, we know we'll be keeping all the 2395 relocs. */ 2396 if (h->dynindx != -1) 2397 goto keep; 2398 } 2399 2400 h->dyn_relocs = NULL; 2401 2402 keep: ; 2403 } 2404 2405 /* Finally, allocate space. */ 2406 for (p = h->dyn_relocs; p != NULL; p = p->next) 2407 { 2408 asection *sreloc = elf_section_data (p->sec)->sreloc; 2409 sreloc->size += p->count * TILEGX_ELF_RELA_BYTES (htab); 2410 } 2411 2412 return true; 2413} 2414 2415/* Return true if the dynamic symbol for a given section should be 2416 omitted when creating a shared library. */ 2417 2418bool 2419tilegx_elf_omit_section_dynsym (bfd *output_bfd, 2420 struct bfd_link_info *info, 2421 asection *p) 2422{ 2423 /* We keep the .got section symbol so that explicit relocations 2424 against the _GLOBAL_OFFSET_TABLE_ symbol emitted in PIC mode 2425 can be turned into relocations against the .got symbol. */ 2426 if (strcmp (p->name, ".got") == 0) 2427 return false; 2428 2429 return _bfd_elf_omit_section_dynsym_default (output_bfd, info, p); 2430} 2431 2432bool 2433tilegx_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 2434 struct bfd_link_info *info) 2435{ 2436 struct tilegx_elf_link_hash_table *htab; 2437 bfd *dynobj; 2438 asection *s; 2439 bfd *ibfd; 2440 2441 htab = tilegx_elf_hash_table (info); 2442 BFD_ASSERT (htab != NULL); 2443 dynobj = htab->elf.dynobj; 2444 BFD_ASSERT (dynobj != NULL); 2445 2446 if (elf_hash_table (info)->dynamic_sections_created) 2447 { 2448 /* Set the contents of the .interp section to the interpreter. */ 2449 if (bfd_link_executable (info) && !info->nointerp) 2450 { 2451 s = bfd_get_linker_section (dynobj, ".interp"); 2452 BFD_ASSERT (s != NULL); 2453 s->size = strlen (htab->dynamic_interpreter) + 1; 2454 s->contents = (unsigned char *) htab->dynamic_interpreter; 2455 } 2456 } 2457 2458 /* Set up .got offsets for local syms, and space for local dynamic 2459 relocs. */ 2460 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 2461 { 2462 bfd_signed_vma *local_got; 2463 bfd_signed_vma *end_local_got; 2464 char *local_tls_type; 2465 bfd_size_type locsymcount; 2466 Elf_Internal_Shdr *symtab_hdr; 2467 asection *srel; 2468 2469 if (! is_tilegx_elf (ibfd)) 2470 continue; 2471 2472 for (s = ibfd->sections; s != NULL; s = s->next) 2473 { 2474 struct elf_dyn_relocs *p; 2475 2476 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) 2477 { 2478 if (!bfd_is_abs_section (p->sec) 2479 && bfd_is_abs_section (p->sec->output_section)) 2480 { 2481 /* Input section has been discarded, either because 2482 it is a copy of a linkonce section or due to 2483 linker script /DISCARD/, so we'll be discarding 2484 the relocs too. */ 2485 } 2486 else if (p->count != 0) 2487 { 2488 srel = elf_section_data (p->sec)->sreloc; 2489 srel->size += p->count * TILEGX_ELF_RELA_BYTES (htab); 2490 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2491 { 2492 info->flags |= DF_TEXTREL; 2493 2494 info->callbacks->minfo (_("%pB: dynamic relocation in read-only section `%pA'\n"), 2495 p->sec->owner, p->sec); 2496 } 2497 } 2498 } 2499 } 2500 2501 local_got = elf_local_got_refcounts (ibfd); 2502 if (!local_got) 2503 continue; 2504 2505 symtab_hdr = &elf_symtab_hdr (ibfd); 2506 locsymcount = symtab_hdr->sh_info; 2507 end_local_got = local_got + locsymcount; 2508 local_tls_type = _bfd_tilegx_elf_local_got_tls_type (ibfd); 2509 s = htab->elf.sgot; 2510 srel = htab->elf.srelgot; 2511 for (; local_got < end_local_got; ++local_got, ++local_tls_type) 2512 { 2513 if (*local_got > 0) 2514 { 2515 *local_got = s->size; 2516 s->size += TILEGX_ELF_WORD_BYTES (htab); 2517 if (*local_tls_type == GOT_TLS_GD) 2518 s->size += TILEGX_ELF_WORD_BYTES (htab); 2519 if (bfd_link_pic (info) 2520 || *local_tls_type == GOT_TLS_GD 2521 || *local_tls_type == GOT_TLS_IE) 2522 srel->size += TILEGX_ELF_RELA_BYTES (htab); 2523 } 2524 else 2525 *local_got = (bfd_vma) -1; 2526 } 2527 } 2528 2529 /* Allocate global sym .plt and .got entries, and space for global 2530 sym dynamic relocs. */ 2531 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); 2532 2533 if (elf_hash_table (info)->dynamic_sections_created) 2534 { 2535 /* If the .got section is more than 0x8000 bytes, we add 2536 0x8000 to the value of _GLOBAL_OFFSET_TABLE_, so that 16 2537 bit relocations have a greater chance of working. */ 2538 if (htab->elf.sgot->size >= 0x8000 2539 && elf_hash_table (info)->hgot->root.u.def.value == 0) 2540 elf_hash_table (info)->hgot->root.u.def.value = 0x8000; 2541 } 2542 2543 if (htab->elf.sgotplt) 2544 { 2545 struct elf_link_hash_entry *got; 2546 got = elf_link_hash_lookup (elf_hash_table (info), 2547 "_GLOBAL_OFFSET_TABLE_", 2548 false, false, false); 2549 2550 /* Don't allocate .got.plt section if there are no GOT nor PLT 2551 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ 2552 if ((got == NULL 2553 || !got->ref_regular_nonweak) 2554 && (htab->elf.sgotplt->size 2555 == (unsigned)GOTPLT_HEADER_SIZE (htab)) 2556 && (htab->elf.splt == NULL 2557 || htab->elf.splt->size == 0) 2558 && (htab->elf.sgot == NULL 2559 || (htab->elf.sgot->size 2560 == get_elf_backend_data (output_bfd)->got_header_size))) 2561 htab->elf.sgotplt->size = 0; 2562 } 2563 2564 /* The check_relocs and adjust_dynamic_symbol entry points have 2565 determined the sizes of the various dynamic sections. Allocate 2566 memory for them. */ 2567 for (s = dynobj->sections; s != NULL; s = s->next) 2568 { 2569 if ((s->flags & SEC_LINKER_CREATED) == 0) 2570 continue; 2571 2572 if (s == htab->elf.splt 2573 || s == htab->elf.sgot 2574 || s == htab->elf.sgotplt 2575 || s == htab->elf.sdynbss 2576 || s == htab->elf.sdynrelro) 2577 { 2578 /* Strip this section if we don't need it; see the 2579 comment below. */ 2580 } 2581 else if (startswith (s->name, ".rela")) 2582 { 2583 if (s->size != 0) 2584 { 2585 /* We use the reloc_count field as a counter if we need 2586 to copy relocs into the output file. */ 2587 s->reloc_count = 0; 2588 } 2589 } 2590 else 2591 { 2592 /* It's not one of our sections. */ 2593 continue; 2594 } 2595 2596 if (s->size == 0) 2597 { 2598 /* If we don't need this section, strip it from the 2599 output file. This is mostly to handle .rela.bss and 2600 .rela.plt. We must create both sections in 2601 create_dynamic_sections, because they must be created 2602 before the linker maps input sections to output 2603 sections. The linker does that before 2604 adjust_dynamic_symbol is called, and it is that 2605 function which decides whether anything needs to go 2606 into these sections. */ 2607 s->flags |= SEC_EXCLUDE; 2608 continue; 2609 } 2610 2611 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2612 continue; 2613 2614 /* Allocate memory for the section contents. Zero the memory 2615 for the benefit of .rela.plt, which has 4 unused entries 2616 at the beginning, and we don't want garbage. */ 2617 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 2618 if (s->contents == NULL) 2619 return false; 2620 } 2621 2622 return _bfd_elf_add_dynamic_tags (output_bfd, info, true); 2623} 2624 2625/* Return the base VMA address which should be subtracted from real addresses 2626 when resolving @dtpoff relocation. 2627 This is PT_TLS segment p_vaddr. */ 2628 2629static bfd_vma 2630dtpoff_base (struct bfd_link_info *info) 2631{ 2632 /* If tls_sec is NULL, we should have signalled an error already. */ 2633 if (elf_hash_table (info)->tls_sec == NULL) 2634 return 0; 2635 return elf_hash_table (info)->tls_sec->vma; 2636} 2637 2638/* Return the relocation value for @tpoff relocation. */ 2639 2640static bfd_vma 2641tpoff (struct bfd_link_info *info, bfd_vma address) 2642{ 2643 struct elf_link_hash_table *htab = elf_hash_table (info); 2644 2645 /* If tls_sec is NULL, we should have signalled an error already. */ 2646 if (htab->tls_sec == NULL) 2647 return 0; 2648 2649 return (address - htab->tls_sec->vma); 2650} 2651 2652/* Copy SIZE bits from FROM to TO at address ADDR. */ 2653 2654static void 2655tilegx_copy_bits (bfd_byte *addr, int from, int to, int size) 2656{ 2657 int i; 2658 for (i = 0; i < size; i++) 2659 { 2660 int from_byte = (from + i) / 8; 2661 int from_bit = (from + i) % 8; 2662 int to_byte = (to + i) / 8; 2663 int to_bit = (to + i) % 8; 2664 bfd_byte to_mask = 1 << to_bit; 2665 addr[to_byte] = (addr[to_byte] & ~to_mask) 2666 | ((addr[from_byte] >> from_bit << to_bit) & to_mask); 2667 } 2668} 2669 2670/* Replace the MASK bits in ADDR with those in INSN, for the next 2671 TILEGX_BUNDLE_SIZE_IN_BYTES bytes. */ 2672 2673static void 2674tilegx_replace_insn (bfd_byte *addr, const bfd_byte *mask, 2675 const bfd_byte *insn) 2676{ 2677 int i; 2678 for (i = 0; i < TILEGX_BUNDLE_SIZE_IN_BYTES; i++) 2679 { 2680 addr[i] = (addr[i] & ~mask[i]) | (insn[i] & mask[i]); 2681 } 2682} 2683 2684/* Mask to extract the bits corresponding to an instruction in a 2685 specific pipe of a bundle. */ 2686static const bfd_byte insn_mask_X1[] = { 2687 0x00, 0x00, 0x00, 0x80, 0xff, 0xff, 0xff, 0x3f 2688}; 2689 2690/* Mask to extract the bits corresponding to an instruction in a 2691 specific pipe of a bundle, minus the destination operand and the 2692 first source operand. */ 2693static const bfd_byte insn_mask_X0_no_dest_no_srca[] = { 2694 0x00, 0xf0, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x00 2695}; 2696 2697static const bfd_byte insn_mask_X1_no_dest_no_srca[] = { 2698 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0xff, 0x3f 2699}; 2700 2701static const bfd_byte insn_mask_Y0_no_dest_no_srca[] = { 2702 0x00, 0xf0, 0x0f, 0x78, 0x00, 0x00, 0x00, 0x00 2703}; 2704static const bfd_byte insn_mask_Y1_no_dest_no_srca[] = { 2705 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x07, 0x3c 2706}; 2707 2708/* Mask to extract the bits corresponding to an instruction in a 2709 specific pipe of a bundle, minus the register operands. */ 2710static const bfd_byte insn_mask_X0_no_operand[] = { 2711 0x00, 0x00, 0xfc, 0x7f, 0x00, 0x00, 0x00, 0x00 2712}; 2713 2714static const bfd_byte insn_mask_X1_no_operand[] = { 2715 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x3f 2716}; 2717 2718static const bfd_byte insn_mask_Y0_no_operand[] = { 2719 0x00, 0x00, 0x0c, 0x78, 0x00, 0x00, 0x00, 0x00 2720}; 2721 2722static const bfd_byte insn_mask_Y1_no_operand[] = { 2723 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x3c 2724}; 2725 2726/* Various instructions synthesized to support tls references. */ 2727 2728/* ld r0, r0 in the X1 pipe, used for tls ie. */ 2729static const bfd_byte insn_tls_ie_ld_X1[] = { 2730 0x00, 0x00, 0x00, 0x00, 0x00, 0xe8, 0x6a, 0x28 2731}; 2732 2733/* ld4s r0, r0 in the X1 pipe, used for tls ie. */ 2734static const bfd_byte insn_tls_ie_ld4s_X1[] = { 2735 0x00, 0x00, 0x00, 0x00, 0x00, 0x98, 0x6a, 0x28 2736}; 2737 2738/* add r0, r0, tp in various pipes, used for tls ie. */ 2739static const bfd_byte insn_tls_ie_add_X0X1[] = { 2740 0x00, 0x50, 0x0f, 0x50, 0x00, 0xa8, 0x07, 0x28 2741}; 2742static const bfd_byte insn_tls_ie_add_Y0Y1[] = { 2743 0x00, 0x50, 0x27, 0x2c, 0x00, 0xa8, 0x13, 0x9a 2744}; 2745 2746/* addx r0, r0, tp in various pipes, used for tls ie. */ 2747static const bfd_byte insn_tls_ie_addx_X0X1[] = { 2748 0x00, 0x50, 0x0b, 0x50, 0x00, 0xa8, 0x05, 0x28 2749}; 2750static const bfd_byte insn_tls_ie_addx_Y0Y1[] = { 2751 0x00, 0x50, 0x03, 0x2c, 0x00, 0xa8, 0x01, 0x9a 2752}; 2753 2754/* move r0, r0 in various pipes, used for tls gd. */ 2755static const bfd_byte insn_tls_gd_add_X0X1[] = { 2756 0x00, 0xf0, 0x07, 0x51, 0x00, 0xf8, 0x3b, 0x28 2757}; 2758static const bfd_byte insn_tls_gd_add_Y0Y1[] = { 2759 0x00, 0xf0, 0x0b, 0x54, 0x00, 0xf8, 0x05, 0xae 2760}; 2761 2762static const bfd_byte *insn_move_X0X1 = insn_tls_gd_add_X0X1; 2763static const bfd_byte *insn_move_Y0Y1 = insn_tls_gd_add_Y0Y1; 2764 2765static const bfd_byte *insn_add_X0X1 = insn_tls_ie_add_X0X1; 2766static const bfd_byte *insn_add_Y0Y1 = insn_tls_ie_add_Y0Y1; 2767 2768static const bfd_byte *insn_addx_X0X1 = insn_tls_ie_addx_X0X1; 2769static const bfd_byte *insn_addx_Y0Y1 = insn_tls_ie_addx_Y0Y1; 2770 2771/* Relocate an TILEGX ELF section. 2772 2773 The RELOCATE_SECTION function is called by the new ELF backend linker 2774 to handle the relocations for a section. 2775 2776 The relocs are always passed as Rela structures. 2777 2778 This function is responsible for adjusting the section contents as 2779 necessary, and (if generating a relocatable output file) adjusting 2780 the reloc addend as necessary. 2781 2782 This function does not have to worry about setting the reloc 2783 address or the reloc symbol index. 2784 2785 LOCAL_SYMS is a pointer to the swapped in local symbols. 2786 2787 LOCAL_SECTIONS is an array giving the section in the input file 2788 corresponding to the st_shndx field of each local symbol. 2789 2790 The global hash table entry for the global symbols can be found 2791 via elf_sym_hashes (input_bfd). 2792 2793 When generating relocatable output, this function must handle 2794 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 2795 going to be the section symbol corresponding to the output 2796 section, which means that the addend must be adjusted 2797 accordingly. */ 2798 2799int 2800tilegx_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info, 2801 bfd *input_bfd, asection *input_section, 2802 bfd_byte *contents, Elf_Internal_Rela *relocs, 2803 Elf_Internal_Sym *local_syms, 2804 asection **local_sections) 2805{ 2806 struct tilegx_elf_link_hash_table *htab; 2807 Elf_Internal_Shdr *symtab_hdr; 2808 struct elf_link_hash_entry **sym_hashes; 2809 bfd_vma *local_got_offsets; 2810 bfd_vma got_base; 2811 asection *sreloc; 2812 Elf_Internal_Rela *rel; 2813 Elf_Internal_Rela *relend; 2814 int num_relocs; 2815 2816 htab = tilegx_elf_hash_table (info); 2817 BFD_ASSERT (htab != NULL); 2818 symtab_hdr = &elf_symtab_hdr (input_bfd); 2819 sym_hashes = elf_sym_hashes (input_bfd); 2820 local_got_offsets = elf_local_got_offsets (input_bfd); 2821 2822 if (elf_hash_table (info)->hgot == NULL) 2823 got_base = 0; 2824 else 2825 got_base = elf_hash_table (info)->hgot->root.u.def.value; 2826 2827 sreloc = elf_section_data (input_section)->sreloc; 2828 2829 rel = relocs; 2830 num_relocs = input_section->reloc_count; 2831 relend = relocs + num_relocs; 2832 for (; rel < relend; rel++) 2833 { 2834 int r_type, tls_type; 2835 bool is_tls_iele, is_tls_le; 2836 reloc_howto_type *howto; 2837 unsigned long r_symndx; 2838 struct elf_link_hash_entry *h; 2839 Elf_Internal_Sym *sym; 2840 tilegx_create_func create_func; 2841 asection *sec; 2842 bfd_vma relocation; 2843 bfd_reloc_status_type r; 2844 const char *name; 2845 bfd_vma off; 2846 bool is_plt = false; 2847 bool resolved_to_zero; 2848 bool unresolved_reloc; 2849 2850 r_type = TILEGX_ELF_R_TYPE (rel->r_info); 2851 if (r_type == R_TILEGX_GNU_VTINHERIT 2852 || r_type == R_TILEGX_GNU_VTENTRY) 2853 continue; 2854 2855 if ((unsigned int)r_type >= ARRAY_SIZE (tilegx_elf_howto_table)) 2856 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); 2857 2858 howto = tilegx_elf_howto_table + r_type; 2859 2860 /* This is a final link. */ 2861 r_symndx = TILEGX_ELF_R_SYMNDX (htab, rel->r_info); 2862 h = NULL; 2863 sym = NULL; 2864 sec = NULL; 2865 unresolved_reloc = false; 2866 if (r_symndx < symtab_hdr->sh_info) 2867 { 2868 sym = local_syms + r_symndx; 2869 sec = local_sections[r_symndx]; 2870 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2871 } 2872 else 2873 { 2874 bool warned ATTRIBUTE_UNUSED; 2875 bool ignored ATTRIBUTE_UNUSED; 2876 2877 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 2878 r_symndx, symtab_hdr, sym_hashes, 2879 h, sec, relocation, 2880 unresolved_reloc, warned, ignored); 2881 if (warned) 2882 { 2883 /* To avoid generating warning messages about truncated 2884 relocations, set the relocation's address to be the same as 2885 the start of this section. */ 2886 if (input_section->output_section != NULL) 2887 relocation = input_section->output_section->vma; 2888 else 2889 relocation = 0; 2890 } 2891 } 2892 2893 if (sec != NULL && discarded_section (sec)) 2894 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2895 rel, 1, relend, howto, 0, contents); 2896 2897 if (bfd_link_relocatable (info)) 2898 continue; 2899 2900 if (h != NULL) 2901 name = h->root.root.string; 2902 else 2903 { 2904 name = (bfd_elf_string_from_elf_section 2905 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 2906 if (name == NULL || *name == '\0') 2907 name = bfd_section_name (sec); 2908 } 2909 2910 switch (r_type) 2911 { 2912 case R_TILEGX_TLS_GD_CALL: 2913 case R_TILEGX_IMM8_X0_TLS_GD_ADD: 2914 case R_TILEGX_IMM8_Y0_TLS_GD_ADD: 2915 case R_TILEGX_IMM8_X1_TLS_GD_ADD: 2916 case R_TILEGX_IMM8_Y1_TLS_GD_ADD: 2917 case R_TILEGX_IMM8_X0_TLS_ADD: 2918 case R_TILEGX_IMM8_Y0_TLS_ADD: 2919 case R_TILEGX_IMM8_X1_TLS_ADD: 2920 case R_TILEGX_IMM8_Y1_TLS_ADD: 2921 tls_type = GOT_UNKNOWN; 2922 if (h == NULL && local_got_offsets) 2923 tls_type = 2924 _bfd_tilegx_elf_local_got_tls_type (input_bfd) [r_symndx]; 2925 else if (h != NULL) 2926 tls_type = tilegx_elf_hash_entry(h)->tls_type; 2927 2928 is_tls_iele = (bfd_link_executable (info) || tls_type == GOT_TLS_IE); 2929 is_tls_le = is_tls_iele && (!input_section->sec_flg0 2930 && bfd_link_executable (info) 2931 && (h == NULL || h->dynindx == -1)); 2932 2933 if (r_type == R_TILEGX_TLS_GD_CALL) 2934 { 2935 if (is_tls_le) 2936 { 2937 /* GD -> LE */ 2938 tilegx_replace_insn (contents + rel->r_offset, 2939 insn_mask_X1, insn_move_X0X1); 2940 continue; 2941 } 2942 else if (is_tls_iele) 2943 { 2944 /* GD -> IE */ 2945 if (ABI_64_P (output_bfd)) 2946 tilegx_replace_insn (contents + rel->r_offset, 2947 insn_mask_X1, insn_tls_ie_ld_X1); 2948 else 2949 tilegx_replace_insn (contents + rel->r_offset, 2950 insn_mask_X1, insn_tls_ie_ld4s_X1); 2951 continue; 2952 } 2953 2954 /* GD -> GD */ 2955 h = (struct elf_link_hash_entry *) 2956 bfd_link_hash_lookup (info->hash, "__tls_get_addr", false, 2957 false, true); 2958 BFD_ASSERT (h != NULL); 2959 r_type = R_TILEGX_JUMPOFF_X1_PLT; 2960 howto = tilegx_elf_howto_table + r_type; 2961 } 2962 else if (r_type == R_TILEGX_IMM8_X0_TLS_ADD 2963 || r_type == R_TILEGX_IMM8_X1_TLS_ADD 2964 || r_type == R_TILEGX_IMM8_Y0_TLS_ADD 2965 || r_type == R_TILEGX_IMM8_Y1_TLS_ADD) 2966 { 2967 bool is_pipe0 = 2968 (r_type == R_TILEGX_IMM8_X0_TLS_ADD 2969 || r_type == R_TILEGX_IMM8_Y0_TLS_ADD); 2970 bool is_X0X1 = 2971 (r_type == R_TILEGX_IMM8_X0_TLS_ADD 2972 || r_type == R_TILEGX_IMM8_X1_TLS_ADD); 2973 int dest_begin = is_pipe0 ? 0 : 31; 2974 int src_begin; 2975 const bfd_byte *insn; 2976 const bfd_byte *mask = NULL; 2977 2978 if (is_tls_le) 2979 { 2980 /* 1. copy dest operand into the first source operand. 2981 2. change the opcode to "move". */ 2982 src_begin = is_pipe0 ? 6 : 37; 2983 insn = is_X0X1 ? insn_move_X0X1 : insn_move_Y0Y1; 2984 2985 switch (r_type) 2986 { 2987 case R_TILEGX_IMM8_X0_TLS_ADD: 2988 mask = insn_mask_X0_no_dest_no_srca; 2989 break; 2990 case R_TILEGX_IMM8_X1_TLS_ADD: 2991 mask = insn_mask_X1_no_dest_no_srca; 2992 break; 2993 case R_TILEGX_IMM8_Y0_TLS_ADD: 2994 mask = insn_mask_Y0_no_dest_no_srca; 2995 break; 2996 case R_TILEGX_IMM8_Y1_TLS_ADD: 2997 mask = insn_mask_Y1_no_dest_no_srca; 2998 break; 2999 } 3000 } 3001 else 3002 { 3003 /* 1. copy dest operand into the second source operand. 3004 2. change the opcode to "add". */ 3005 src_begin = is_pipe0 ? 12 : 43; 3006 if (ABI_64_P (output_bfd)) 3007 insn = is_X0X1 ? insn_add_X0X1 : insn_add_Y0Y1; 3008 else 3009 insn = is_X0X1 ? insn_addx_X0X1 : insn_addx_Y0Y1; 3010 3011 switch (r_type) 3012 { 3013 case R_TILEGX_IMM8_X0_TLS_ADD: 3014 mask = insn_mask_X0_no_operand; 3015 break; 3016 case R_TILEGX_IMM8_X1_TLS_ADD: 3017 mask = insn_mask_X1_no_operand; 3018 break; 3019 case R_TILEGX_IMM8_Y0_TLS_ADD: 3020 mask = insn_mask_Y0_no_operand; 3021 break; 3022 case R_TILEGX_IMM8_Y1_TLS_ADD: 3023 mask = insn_mask_Y1_no_operand; 3024 break; 3025 } 3026 } 3027 3028 tilegx_copy_bits (contents + rel->r_offset, dest_begin, 3029 src_begin, 6); 3030 tilegx_replace_insn (contents + rel->r_offset, mask, insn); 3031 3032 continue; 3033 } 3034 else 3035 { 3036 const bfd_byte *mask = NULL; 3037 const bfd_byte *add_insn = NULL; 3038 bool is_64bit = ABI_64_P (output_bfd); 3039 3040 switch (r_type) 3041 { 3042 case R_TILEGX_IMM8_X0_TLS_GD_ADD: 3043 add_insn = is_tls_iele 3044 ? (is_64bit ? insn_tls_ie_add_X0X1 : insn_tls_ie_addx_X0X1) 3045 : insn_tls_gd_add_X0X1; 3046 mask = insn_mask_X0_no_dest_no_srca; 3047 break; 3048 case R_TILEGX_IMM8_X1_TLS_GD_ADD: 3049 add_insn = is_tls_iele 3050 ? (is_64bit ? insn_tls_ie_add_X0X1 : insn_tls_ie_addx_X0X1) 3051 : insn_tls_gd_add_X0X1; 3052 mask = insn_mask_X1_no_dest_no_srca; 3053 break; 3054 case R_TILEGX_IMM8_Y0_TLS_GD_ADD: 3055 add_insn = is_tls_iele 3056 ? (is_64bit ? insn_tls_ie_add_Y0Y1 : insn_tls_ie_addx_Y0Y1) 3057 : insn_tls_gd_add_Y0Y1; 3058 mask = insn_mask_Y0_no_dest_no_srca; 3059 break; 3060 case R_TILEGX_IMM8_Y1_TLS_GD_ADD: 3061 add_insn = is_tls_iele 3062 ? (is_64bit ? insn_tls_ie_add_Y0Y1 : insn_tls_ie_addx_Y0Y1) 3063 : insn_tls_gd_add_Y0Y1; 3064 mask = insn_mask_Y1_no_dest_no_srca; 3065 break; 3066 } 3067 3068 tilegx_replace_insn (contents + rel->r_offset, mask, add_insn); 3069 3070 continue; 3071 } 3072 break; 3073 case R_TILEGX_TLS_IE_LOAD: 3074 if (!input_section->sec_flg0 3075 && bfd_link_executable (info) 3076 && (h == NULL || h->dynindx == -1)) 3077 { 3078 /* IE -> LE */ 3079 tilegx_replace_insn (contents + rel->r_offset, 3080 insn_mask_X1_no_dest_no_srca, 3081 insn_move_X0X1); 3082 } 3083 else 3084 { 3085 /* IE -> IE */ 3086 if (ABI_64_P (output_bfd)) 3087 tilegx_replace_insn (contents + rel->r_offset, 3088 insn_mask_X1_no_dest_no_srca, 3089 insn_tls_ie_ld_X1); 3090 else 3091 tilegx_replace_insn (contents + rel->r_offset, 3092 insn_mask_X1_no_dest_no_srca, 3093 insn_tls_ie_ld4s_X1); 3094 } 3095 continue; 3096 break; 3097 default: 3098 break; 3099 } 3100 3101 resolved_to_zero = (h != NULL 3102 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); 3103 3104 switch (r_type) 3105 { 3106 case R_TILEGX_IMM16_X0_HW0_GOT: 3107 case R_TILEGX_IMM16_X1_HW0_GOT: 3108 case R_TILEGX_IMM16_X0_HW0_LAST_GOT: 3109 case R_TILEGX_IMM16_X1_HW0_LAST_GOT: 3110 case R_TILEGX_IMM16_X0_HW1_LAST_GOT: 3111 case R_TILEGX_IMM16_X1_HW1_LAST_GOT: 3112 /* Relocation is to the entry for this symbol in the global 3113 offset table. */ 3114 if (htab->elf.sgot == NULL) 3115 abort (); 3116 3117 if (h != NULL) 3118 { 3119 bool dyn; 3120 3121 off = h->got.offset; 3122 BFD_ASSERT (off != (bfd_vma) -1); 3123 dyn = elf_hash_table (info)->dynamic_sections_created; 3124 3125 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 3126 bfd_link_pic (info), 3127 h) 3128 || (bfd_link_pic (info) 3129 && SYMBOL_REFERENCES_LOCAL (info, h))) 3130 { 3131 /* This is actually a static link, or it is a 3132 -Bsymbolic link and the symbol is defined 3133 locally, or the symbol was forced to be local 3134 because of a version file. We must initialize 3135 this entry in the global offset table. Since the 3136 offset must always be a multiple 3137 of 8 for 64-bit, we use the least significant bit 3138 to record whether we have initialized it already. 3139 3140 When doing a dynamic link, we create a .rela.got 3141 relocation entry to initialize the value. This 3142 is done in the finish_dynamic_symbol routine. */ 3143 if ((off & 1) != 0) 3144 off &= ~1; 3145 else 3146 { 3147 TILEGX_ELF_PUT_WORD (htab, output_bfd, relocation, 3148 htab->elf.sgot->contents + off); 3149 h->got.offset |= 1; 3150 } 3151 } 3152 else 3153 unresolved_reloc = false; 3154 } 3155 else 3156 { 3157 BFD_ASSERT (local_got_offsets != NULL 3158 && local_got_offsets[r_symndx] != (bfd_vma) -1); 3159 3160 off = local_got_offsets[r_symndx]; 3161 3162 /* The offset must always be a multiple of 8 on 64-bit. 3163 We use the least significant bit to record 3164 whether we have already processed this entry. */ 3165 if ((off & 1) != 0) 3166 off &= ~1; 3167 else 3168 { 3169 if (bfd_link_pic (info)) 3170 { 3171 asection *s; 3172 Elf_Internal_Rela outrel; 3173 3174 /* We need to generate a R_TILEGX_RELATIVE reloc 3175 for the dynamic linker. */ 3176 s = htab->elf.srelgot; 3177 BFD_ASSERT (s != NULL); 3178 3179 outrel.r_offset = (htab->elf.sgot->output_section->vma 3180 + htab->elf.sgot->output_offset 3181 + off); 3182 outrel.r_info = 3183 TILEGX_ELF_R_INFO (htab, NULL, 0, R_TILEGX_RELATIVE); 3184 outrel.r_addend = relocation; 3185 relocation = 0; 3186 tilegx_elf_append_rela (output_bfd, s, &outrel); 3187 } 3188 3189 TILEGX_ELF_PUT_WORD (htab, output_bfd, relocation, 3190 htab->elf.sgot->contents + off); 3191 local_got_offsets[r_symndx] |= 1; 3192 } 3193 } 3194 relocation = off - got_base; 3195 break; 3196 3197 case R_TILEGX_JUMPOFF_X1_PLT: 3198 case R_TILEGX_IMM16_X0_HW0_PLT_PCREL: 3199 case R_TILEGX_IMM16_X1_HW0_PLT_PCREL: 3200 case R_TILEGX_IMM16_X0_HW1_PLT_PCREL: 3201 case R_TILEGX_IMM16_X1_HW1_PLT_PCREL: 3202 case R_TILEGX_IMM16_X0_HW2_PLT_PCREL: 3203 case R_TILEGX_IMM16_X1_HW2_PLT_PCREL: 3204 case R_TILEGX_IMM16_X0_HW3_PLT_PCREL: 3205 case R_TILEGX_IMM16_X1_HW3_PLT_PCREL: 3206 case R_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL: 3207 case R_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL: 3208 case R_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL: 3209 case R_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL: 3210 case R_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL: 3211 case R_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL: 3212 /* Relocation is to the entry for this symbol in the 3213 procedure linkage table. */ 3214 BFD_ASSERT (h != NULL); 3215 3216 if (h->plt.offset == (bfd_vma) -1 || htab->elf.splt == NULL) 3217 { 3218 /* We didn't make a PLT entry for this symbol. This 3219 happens when statically linking PIC code, or when 3220 using -Bsymbolic. */ 3221 break; 3222 } 3223 3224 relocation = (htab->elf.splt->output_section->vma 3225 + htab->elf.splt->output_offset 3226 + h->plt.offset); 3227 unresolved_reloc = false; 3228 break; 3229 3230 case R_TILEGX_64_PCREL: 3231 case R_TILEGX_32_PCREL: 3232 case R_TILEGX_16_PCREL: 3233 case R_TILEGX_8_PCREL: 3234 case R_TILEGX_IMM16_X0_HW0_PCREL: 3235 case R_TILEGX_IMM16_X1_HW0_PCREL: 3236 case R_TILEGX_IMM16_X0_HW1_PCREL: 3237 case R_TILEGX_IMM16_X1_HW1_PCREL: 3238 case R_TILEGX_IMM16_X0_HW2_PCREL: 3239 case R_TILEGX_IMM16_X1_HW2_PCREL: 3240 case R_TILEGX_IMM16_X0_HW3_PCREL: 3241 case R_TILEGX_IMM16_X1_HW3_PCREL: 3242 case R_TILEGX_IMM16_X0_HW0_LAST_PCREL: 3243 case R_TILEGX_IMM16_X1_HW0_LAST_PCREL: 3244 case R_TILEGX_IMM16_X0_HW1_LAST_PCREL: 3245 case R_TILEGX_IMM16_X1_HW1_LAST_PCREL: 3246 case R_TILEGX_IMM16_X0_HW2_LAST_PCREL: 3247 case R_TILEGX_IMM16_X1_HW2_LAST_PCREL: 3248 if (h != NULL 3249 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 3250 break; 3251 /* Fall through. */ 3252 case R_TILEGX_64: 3253 case R_TILEGX_32: 3254 case R_TILEGX_16: 3255 case R_TILEGX_8: 3256 case R_TILEGX_HW0: 3257 case R_TILEGX_HW1: 3258 case R_TILEGX_HW2: 3259 case R_TILEGX_HW3: 3260 case R_TILEGX_HW0_LAST: 3261 case R_TILEGX_HW1_LAST: 3262 case R_TILEGX_HW2_LAST: 3263 case R_TILEGX_COPY: 3264 case R_TILEGX_GLOB_DAT: 3265 case R_TILEGX_JMP_SLOT: 3266 case R_TILEGX_RELATIVE: 3267 case R_TILEGX_BROFF_X1: 3268 case R_TILEGX_JUMPOFF_X1: 3269 case R_TILEGX_IMM8_X0: 3270 case R_TILEGX_IMM8_Y0: 3271 case R_TILEGX_IMM8_X1: 3272 case R_TILEGX_IMM8_Y1: 3273 case R_TILEGX_DEST_IMM8_X1: 3274 case R_TILEGX_MT_IMM14_X1: 3275 case R_TILEGX_MF_IMM14_X1: 3276 case R_TILEGX_MMSTART_X0: 3277 case R_TILEGX_MMEND_X0: 3278 case R_TILEGX_SHAMT_X0: 3279 case R_TILEGX_SHAMT_X1: 3280 case R_TILEGX_SHAMT_Y0: 3281 case R_TILEGX_SHAMT_Y1: 3282 case R_TILEGX_IMM16_X0_HW0: 3283 case R_TILEGX_IMM16_X1_HW0: 3284 case R_TILEGX_IMM16_X0_HW1: 3285 case R_TILEGX_IMM16_X1_HW1: 3286 case R_TILEGX_IMM16_X0_HW2: 3287 case R_TILEGX_IMM16_X1_HW2: 3288 case R_TILEGX_IMM16_X0_HW3: 3289 case R_TILEGX_IMM16_X1_HW3: 3290 case R_TILEGX_IMM16_X0_HW0_LAST: 3291 case R_TILEGX_IMM16_X1_HW0_LAST: 3292 case R_TILEGX_IMM16_X0_HW1_LAST: 3293 case R_TILEGX_IMM16_X1_HW1_LAST: 3294 case R_TILEGX_IMM16_X0_HW2_LAST: 3295 case R_TILEGX_IMM16_X1_HW2_LAST: 3296 if ((input_section->flags & SEC_ALLOC) == 0) 3297 break; 3298 3299 if ((bfd_link_pic (info) 3300 && (h == NULL 3301 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 3302 && !resolved_to_zero) 3303 || h->root.type != bfd_link_hash_undefweak) 3304 && (! howto->pc_relative 3305 || !SYMBOL_CALLS_LOCAL (info, h))) 3306 || (!bfd_link_pic (info) 3307 && h != NULL 3308 && h->dynindx != -1 3309 && !h->non_got_ref 3310 && ((h->def_dynamic 3311 && !h->def_regular) 3312 || h->root.type == bfd_link_hash_undefweak 3313 || h->root.type == bfd_link_hash_undefined))) 3314 { 3315 Elf_Internal_Rela outrel; 3316 bool skip, relocate = false; 3317 3318 /* When generating a shared object, these relocations 3319 are copied into the output file to be resolved at run 3320 time. */ 3321 3322 BFD_ASSERT (sreloc != NULL); 3323 3324 skip = false; 3325 3326 outrel.r_offset = 3327 _bfd_elf_section_offset (output_bfd, info, input_section, 3328 rel->r_offset); 3329 if (outrel.r_offset == (bfd_vma) -1) 3330 skip = true; 3331 else if (outrel.r_offset == (bfd_vma) -2) 3332 skip = true, relocate = true; 3333 outrel.r_offset += (input_section->output_section->vma 3334 + input_section->output_offset); 3335 3336 switch (r_type) 3337 { 3338 case R_TILEGX_64_PCREL: 3339 case R_TILEGX_32_PCREL: 3340 case R_TILEGX_16_PCREL: 3341 case R_TILEGX_8_PCREL: 3342 /* If the symbol is not dynamic, we should not keep 3343 a dynamic relocation. But an .rela.* slot has been 3344 allocated for it, output R_TILEGX_NONE. 3345 FIXME: Add code tracking needed dynamic relocs as 3346 e.g. i386 has. */ 3347 if (h->dynindx == -1) 3348 skip = true, relocate = true; 3349 break; 3350 } 3351 3352 if (skip) 3353 memset (&outrel, 0, sizeof outrel); 3354 /* h->dynindx may be -1 if the symbol was marked to 3355 become local. */ 3356 else if (h != NULL && 3357 h->dynindx != -1 3358 && (! is_plt 3359 || !bfd_link_pic (info) 3360 || !SYMBOLIC_BIND (info, h) 3361 || !h->def_regular)) 3362 { 3363 BFD_ASSERT (h->dynindx != -1); 3364 outrel.r_info = TILEGX_ELF_R_INFO (htab, rel, h->dynindx, r_type); 3365 outrel.r_addend = rel->r_addend; 3366 } 3367 else 3368 { 3369 if (r_type == R_TILEGX_32 || r_type == R_TILEGX_64) 3370 { 3371 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, 0, 3372 R_TILEGX_RELATIVE); 3373 outrel.r_addend = relocation + rel->r_addend; 3374 } 3375 else 3376 { 3377 long indx; 3378 3379 outrel.r_addend = relocation + rel->r_addend; 3380 3381 if (is_plt) 3382 sec = htab->elf.splt; 3383 3384 if (bfd_is_abs_section (sec)) 3385 indx = 0; 3386 else if (sec == NULL || sec->owner == NULL) 3387 { 3388 bfd_set_error (bfd_error_bad_value); 3389 return false; 3390 } 3391 else 3392 { 3393 asection *osec; 3394 3395 /* We are turning this relocation into one 3396 against a section symbol. It would be 3397 proper to subtract the symbol's value, 3398 osec->vma, from the emitted reloc addend, 3399 but ld.so expects buggy relocs. */ 3400 osec = sec->output_section; 3401 indx = elf_section_data (osec)->dynindx; 3402 3403 if (indx == 0) 3404 { 3405 osec = htab->elf.text_index_section; 3406 indx = elf_section_data (osec)->dynindx; 3407 } 3408 3409 /* FIXME: we really should be able to link non-pic 3410 shared libraries. */ 3411 if (indx == 0) 3412 { 3413 BFD_FAIL (); 3414 _bfd_error_handler 3415 (_("%pB: probably compiled without -fPIC?"), 3416 input_bfd); 3417 bfd_set_error (bfd_error_bad_value); 3418 return false; 3419 } 3420 } 3421 3422 outrel.r_info = TILEGX_ELF_R_INFO (htab, rel, indx, 3423 r_type); 3424 } 3425 } 3426 3427 tilegx_elf_append_rela (output_bfd, sreloc, &outrel); 3428 3429 /* This reloc will be computed at runtime, so there's no 3430 need to do anything now. */ 3431 if (! relocate) 3432 continue; 3433 } 3434 break; 3435 3436 case R_TILEGX_IMM16_X0_HW0_TLS_LE: 3437 case R_TILEGX_IMM16_X1_HW0_TLS_LE: 3438 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE: 3439 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE: 3440 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE: 3441 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE: 3442 if (!bfd_link_executable (info)) 3443 { 3444 Elf_Internal_Rela outrel; 3445 bool skip; 3446 3447 BFD_ASSERT (sreloc != NULL); 3448 skip = false; 3449 outrel.r_offset = 3450 _bfd_elf_section_offset (output_bfd, info, input_section, 3451 rel->r_offset); 3452 if (outrel.r_offset == (bfd_vma) -1) 3453 skip = true; 3454 else if (outrel.r_offset == (bfd_vma) -2) 3455 skip = true; 3456 outrel.r_offset += (input_section->output_section->vma 3457 + input_section->output_offset); 3458 if (skip) 3459 memset (&outrel, 0, sizeof outrel); 3460 else 3461 { 3462 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, 0, r_type); 3463 outrel.r_addend = relocation - dtpoff_base (info) 3464 + rel->r_addend; 3465 } 3466 3467 tilegx_elf_append_rela (output_bfd, sreloc, &outrel); 3468 continue; 3469 } 3470 relocation = tpoff (info, relocation); 3471 break; 3472 3473 case R_TILEGX_IMM16_X0_HW0_TLS_GD: 3474 case R_TILEGX_IMM16_X1_HW0_TLS_GD: 3475 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD: 3476 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD: 3477 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD: 3478 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD: 3479 case R_TILEGX_IMM16_X0_HW0_TLS_IE: 3480 case R_TILEGX_IMM16_X1_HW0_TLS_IE: 3481 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE: 3482 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE: 3483 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE: 3484 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE: 3485 r_type = tilegx_elf_tls_transition (info, r_type, h == NULL, 3486 input_section->sec_flg0); 3487 tls_type = GOT_UNKNOWN; 3488 if (h == NULL && local_got_offsets) 3489 tls_type = 3490 _bfd_tilegx_elf_local_got_tls_type (input_bfd) [r_symndx]; 3491 else if (h != NULL) 3492 { 3493 tls_type = tilegx_elf_hash_entry(h)->tls_type; 3494 if (bfd_link_executable (info) 3495 && h->dynindx == -1 3496 && tls_type == GOT_TLS_IE) 3497 r_type = (!input_section->sec_flg0 3498 ? tilegx_tls_translate_to_le (r_type) 3499 : tilegx_tls_translate_to_ie (r_type)); 3500 } 3501 3502 if (tls_type == GOT_TLS_IE) 3503 r_type = tilegx_tls_translate_to_ie (r_type); 3504 3505 if (r_type == R_TILEGX_IMM16_X0_HW0_TLS_LE 3506 || r_type == R_TILEGX_IMM16_X1_HW0_TLS_LE 3507 || r_type == R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE 3508 || r_type == R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE 3509 || r_type == R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE 3510 || r_type == R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE) 3511 { 3512 relocation = tpoff (info, relocation); 3513 break; 3514 } 3515 3516 if (h != NULL) 3517 { 3518 off = h->got.offset; 3519 h->got.offset |= 1; 3520 } 3521 else 3522 { 3523 BFD_ASSERT (local_got_offsets != NULL); 3524 off = local_got_offsets[r_symndx]; 3525 local_got_offsets[r_symndx] |= 1; 3526 } 3527 3528 if (htab->elf.sgot == NULL) 3529 abort (); 3530 3531 if ((off & 1) != 0) 3532 off &= ~1; 3533 else 3534 { 3535 Elf_Internal_Rela outrel; 3536 int indx = 0; 3537 bool need_relocs = false; 3538 3539 if (htab->elf.srelgot == NULL) 3540 abort (); 3541 3542 if (h != NULL) 3543 { 3544 bool dyn; 3545 dyn = htab->elf.dynamic_sections_created; 3546 3547 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 3548 bfd_link_pic (info), 3549 h) 3550 && (!bfd_link_pic (info) 3551 || !SYMBOL_REFERENCES_LOCAL (info, h))) 3552 { 3553 indx = h->dynindx; 3554 } 3555 } 3556 3557 /* The GOT entries have not been initialized yet. Do it 3558 now, and emit any relocations. */ 3559 if ((bfd_link_pic (info) || indx != 0) 3560 && (h == NULL 3561 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 3562 || h->root.type != bfd_link_hash_undefweak)) 3563 need_relocs = true; 3564 3565 switch (r_type) 3566 { 3567 case R_TILEGX_IMM16_X0_HW0_TLS_IE: 3568 case R_TILEGX_IMM16_X1_HW0_TLS_IE: 3569 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE: 3570 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE: 3571 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE: 3572 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE: 3573 if (need_relocs) { 3574 TILEGX_ELF_PUT_WORD (htab, output_bfd, 0, 3575 htab->elf.sgot->contents + off); 3576 outrel.r_offset = (htab->elf.sgot->output_section->vma 3577 + htab->elf.sgot->output_offset + off); 3578 outrel.r_addend = 0; 3579 if (indx == 0) 3580 outrel.r_addend = relocation - dtpoff_base (info); 3581 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, indx, 3582 TILEGX_ELF_TPOFF_RELOC (htab)); 3583 tilegx_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel); 3584 } else { 3585 TILEGX_ELF_PUT_WORD (htab, output_bfd, 3586 tpoff (info, relocation), 3587 htab->elf.sgot->contents + off); 3588 } 3589 break; 3590 3591 case R_TILEGX_IMM16_X0_HW0_TLS_GD: 3592 case R_TILEGX_IMM16_X1_HW0_TLS_GD: 3593 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD: 3594 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD: 3595 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD: 3596 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD: 3597 if (need_relocs) { 3598 outrel.r_offset = (htab->elf.sgot->output_section->vma 3599 + htab->elf.sgot->output_offset + off); 3600 outrel.r_addend = 0; 3601 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, indx, 3602 TILEGX_ELF_DTPMOD_RELOC (htab)); 3603 TILEGX_ELF_PUT_WORD (htab, output_bfd, 0, 3604 htab->elf.sgot->contents + off); 3605 tilegx_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel); 3606 if (indx == 0) 3607 { 3608 BFD_ASSERT (! unresolved_reloc); 3609 TILEGX_ELF_PUT_WORD (htab, output_bfd, 3610 relocation - dtpoff_base (info), 3611 (htab->elf.sgot->contents + off + 3612 TILEGX_ELF_WORD_BYTES (htab))); 3613 } 3614 else 3615 { 3616 TILEGX_ELF_PUT_WORD (htab, output_bfd, 0, 3617 (htab->elf.sgot->contents + off + 3618 TILEGX_ELF_WORD_BYTES (htab))); 3619 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, indx, 3620 TILEGX_ELF_DTPOFF_RELOC (htab)); 3621 outrel.r_offset += TILEGX_ELF_WORD_BYTES (htab); 3622 tilegx_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel); 3623 } 3624 } 3625 3626 else { 3627 /* If we are not emitting relocations for a 3628 general dynamic reference, then we must be in a 3629 static link or an executable link with the 3630 symbol binding locally. Mark it as belonging 3631 to module 1, the executable. */ 3632 TILEGX_ELF_PUT_WORD (htab, output_bfd, 1, 3633 htab->elf.sgot->contents + off ); 3634 TILEGX_ELF_PUT_WORD (htab, output_bfd, 3635 relocation - dtpoff_base (info), 3636 htab->elf.sgot->contents + off + 3637 TILEGX_ELF_WORD_BYTES (htab)); 3638 } 3639 break; 3640 } 3641 } 3642 3643 if (off >= (bfd_vma) -2) 3644 abort (); 3645 3646 relocation = off - got_base; 3647 unresolved_reloc = false; 3648 howto = tilegx_elf_howto_table + r_type; 3649 break; 3650 3651 default: 3652 break; 3653 } 3654 3655 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 3656 because such sections are not SEC_ALLOC and thus ld.so will 3657 not process them. */ 3658 if (unresolved_reloc 3659 && !((input_section->flags & SEC_DEBUGGING) != 0 3660 && h->def_dynamic) 3661 && _bfd_elf_section_offset (output_bfd, info, input_section, 3662 rel->r_offset) != (bfd_vma) -1) 3663 _bfd_error_handler 3664 /* xgettext:c-format */ 3665 (_("%pB(%pA+%#" PRIx64 "): " 3666 "unresolvable %s relocation against symbol `%s'"), 3667 input_bfd, 3668 input_section, 3669 (uint64_t) rel->r_offset, 3670 howto->name, 3671 h->root.root.string); 3672 3673 r = bfd_reloc_continue; 3674 3675 /* Get the operand creation function, if any. */ 3676 create_func = reloc_to_create_func[r_type]; 3677 if (create_func == NULL) 3678 { 3679 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3680 contents, rel->r_offset, 3681 relocation, rel->r_addend); 3682 } 3683 else 3684 { 3685 if (howto->pc_relative) 3686 { 3687 relocation -= 3688 input_section->output_section->vma + input_section->output_offset; 3689 if (howto->pcrel_offset) 3690 relocation -= rel->r_offset; 3691 } 3692 3693 bfd_byte *data; 3694 3695 /* Add the relocation addend if any to the final target value */ 3696 relocation += rel->r_addend; 3697 3698 /* Do basic range checking */ 3699 r = bfd_check_overflow (howto->complain_on_overflow, 3700 howto->bitsize, 3701 howto->rightshift, 3702 TILEGX_ELF_WORD_BYTES (htab) * 8, 3703 relocation); 3704 3705 /* 3706 * Write the relocated value out into the raw section data. 3707 * Don't put a relocation out in the .rela section. 3708 */ 3709 tilegx_bundle_bits mask = create_func(-1); 3710 tilegx_bundle_bits value = create_func(relocation >> howto->rightshift); 3711 3712 /* Only touch bytes while the mask is not 0, so we 3713 don't write to out of bounds memory if this is actually 3714 a 16-bit switch instruction. */ 3715 for (data = contents + rel->r_offset; mask != 0; data++) 3716 { 3717 bfd_byte byte_mask = (bfd_byte)mask; 3718 *data = (*data & ~byte_mask) | ((bfd_byte)value & byte_mask); 3719 mask >>= 8; 3720 value >>= 8; 3721 } 3722 } 3723 3724 if (r != bfd_reloc_ok) 3725 { 3726 const char *msg = NULL; 3727 3728 switch (r) 3729 { 3730 case bfd_reloc_overflow: 3731 (*info->callbacks->reloc_overflow) 3732 (info, (h ? &h->root : NULL), name, howto->name, 3733 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 3734 break; 3735 3736 case bfd_reloc_undefined: 3737 (*info->callbacks->undefined_symbol) 3738 (info, name, input_bfd, input_section, rel->r_offset, true); 3739 break; 3740 3741 case bfd_reloc_outofrange: 3742 msg = _("internal error: out of range error"); 3743 break; 3744 3745 case bfd_reloc_notsupported: 3746 msg = _("internal error: unsupported relocation error"); 3747 break; 3748 3749 case bfd_reloc_dangerous: 3750 msg = _("internal error: dangerous relocation"); 3751 break; 3752 3753 default: 3754 msg = _("internal error: unknown error"); 3755 break; 3756 } 3757 3758 if (msg) 3759 (*info->callbacks->warning) (info, msg, name, input_bfd, 3760 input_section, rel->r_offset); 3761 } 3762 } 3763 3764 return true; 3765} 3766 3767/* Finish up dynamic symbol handling. We set the contents of various 3768 dynamic sections here. */ 3769 3770bool 3771tilegx_elf_finish_dynamic_symbol (bfd *output_bfd, 3772 struct bfd_link_info *info, 3773 struct elf_link_hash_entry *h, 3774 Elf_Internal_Sym *sym) 3775{ 3776 struct tilegx_elf_link_hash_table *htab; 3777 3778 htab = tilegx_elf_hash_table (info); 3779 BFD_ASSERT (htab != NULL); 3780 3781 if (h->plt.offset != (bfd_vma) -1) 3782 { 3783 asection *splt; 3784 asection *srela; 3785 asection *sgotplt; 3786 Elf_Internal_Rela rela; 3787 bfd_byte *loc; 3788 bfd_vma r_offset; 3789 const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); 3790 3791 3792 int rela_index; 3793 3794 /* This symbol has an entry in the PLT. Set it up. */ 3795 3796 BFD_ASSERT (h->dynindx != -1); 3797 3798 splt = htab->elf.splt; 3799 srela = htab->elf.srelplt; 3800 sgotplt = htab->elf.sgotplt; 3801 3802 if (splt == NULL || srela == NULL) 3803 abort (); 3804 3805 /* Fill in the entry in the procedure linkage table. */ 3806 rela_index = tilegx_plt_entry_build (output_bfd, htab, splt, sgotplt, 3807 h->plt.offset, &r_offset); 3808 3809 /* Fill in the entry in the global offset table, which initially points 3810 to the beginning of the plt. */ 3811 TILEGX_ELF_PUT_WORD (htab, output_bfd, 3812 splt->output_section->vma + splt->output_offset, 3813 sgotplt->contents + r_offset); 3814 3815 /* Fill in the entry in the .rela.plt section. */ 3816 rela.r_offset = (sgotplt->output_section->vma 3817 + sgotplt->output_offset 3818 + r_offset); 3819 rela.r_addend = 0; 3820 rela.r_info = TILEGX_ELF_R_INFO (htab, NULL, h->dynindx, R_TILEGX_JMP_SLOT); 3821 3822 loc = srela->contents + rela_index * TILEGX_ELF_RELA_BYTES (htab); 3823 bed->s->swap_reloca_out (output_bfd, &rela, loc); 3824 3825 if (!h->def_regular) 3826 { 3827 /* Mark the symbol as undefined, rather than as defined in 3828 the .plt section. Leave the value alone. */ 3829 sym->st_shndx = SHN_UNDEF; 3830 /* If the symbol is weak, we do need to clear the value. 3831 Otherwise, the PLT entry would provide a definition for 3832 the symbol even if the symbol wasn't defined anywhere, 3833 and so the symbol would never be NULL. */ 3834 if (!h->ref_regular_nonweak) 3835 sym->st_value = 0; 3836 } 3837 } 3838 3839 if (h->got.offset != (bfd_vma) -1 3840 && tilegx_elf_hash_entry(h)->tls_type != GOT_TLS_GD 3841 && tilegx_elf_hash_entry(h)->tls_type != GOT_TLS_IE) 3842 { 3843 asection *sgot; 3844 asection *srela; 3845 Elf_Internal_Rela rela; 3846 3847 /* This symbol has an entry in the GOT. Set it up. */ 3848 3849 sgot = htab->elf.sgot; 3850 srela = htab->elf.srelgot; 3851 BFD_ASSERT (sgot != NULL && srela != NULL); 3852 3853 rela.r_offset = (sgot->output_section->vma 3854 + sgot->output_offset 3855 + (h->got.offset &~ (bfd_vma) 1)); 3856 3857 /* If this is a -Bsymbolic link, and the symbol is defined 3858 locally, we just want to emit a RELATIVE reloc. Likewise if 3859 the symbol was forced to be local because of a version file. 3860 The entry in the global offset table will already have been 3861 initialized in the relocate_section function. */ 3862 if (bfd_link_pic (info) 3863 && (info->symbolic || h->dynindx == -1) 3864 && h->def_regular) 3865 { 3866 asection *sec = h->root.u.def.section; 3867 rela.r_info = TILEGX_ELF_R_INFO (htab, NULL, 0, R_TILEGX_RELATIVE); 3868 rela.r_addend = (h->root.u.def.value 3869 + sec->output_section->vma 3870 + sec->output_offset); 3871 } 3872 else 3873 { 3874 rela.r_info = TILEGX_ELF_R_INFO (htab, NULL, h->dynindx, R_TILEGX_GLOB_DAT); 3875 rela.r_addend = 0; 3876 } 3877 3878 TILEGX_ELF_PUT_WORD (htab, output_bfd, 0, 3879 sgot->contents + (h->got.offset & ~(bfd_vma) 1)); 3880 tilegx_elf_append_rela (output_bfd, srela, &rela); 3881 } 3882 3883 if (h->needs_copy) 3884 { 3885 asection *s; 3886 Elf_Internal_Rela rela; 3887 3888 /* This symbols needs a copy reloc. Set it up. */ 3889 BFD_ASSERT (h->dynindx != -1); 3890 3891 if (h->root.u.def.section == htab->elf.sdynrelro) 3892 s = htab->elf.sreldynrelro; 3893 else 3894 s = htab->elf.srelbss; 3895 BFD_ASSERT (s != NULL); 3896 3897 rela.r_offset = (h->root.u.def.value 3898 + h->root.u.def.section->output_section->vma 3899 + h->root.u.def.section->output_offset); 3900 rela.r_info = TILEGX_ELF_R_INFO (htab, NULL, h->dynindx, R_TILEGX_COPY); 3901 rela.r_addend = 0; 3902 tilegx_elf_append_rela (output_bfd, s, &rela); 3903 } 3904 3905 /* Mark some specially defined symbols as absolute. */ 3906 if (h == htab->elf.hdynamic 3907 || (h == htab->elf.hgot || h == htab->elf.hplt)) 3908 sym->st_shndx = SHN_ABS; 3909 3910 return true; 3911} 3912 3913/* Finish up the dynamic sections. */ 3914 3915static bool 3916tilegx_finish_dyn (bfd *output_bfd, struct bfd_link_info *info, 3917 bfd *dynobj, asection *sdyn, 3918 asection *splt ATTRIBUTE_UNUSED) 3919{ 3920 struct tilegx_elf_link_hash_table *htab; 3921 const struct elf_backend_data *bed; 3922 bfd_byte *dyncon, *dynconend; 3923 size_t dynsize; 3924 3925 htab = tilegx_elf_hash_table (info); 3926 BFD_ASSERT (htab != NULL); 3927 bed = get_elf_backend_data (output_bfd); 3928 dynsize = bed->s->sizeof_dyn; 3929 dynconend = sdyn->contents + sdyn->size; 3930 3931 for (dyncon = sdyn->contents; dyncon < dynconend; dyncon += dynsize) 3932 { 3933 Elf_Internal_Dyn dyn; 3934 asection *s; 3935 3936 bed->s->swap_dyn_in (dynobj, dyncon, &dyn); 3937 3938 switch (dyn.d_tag) 3939 { 3940 case DT_PLTGOT: 3941 s = htab->elf.sgotplt; 3942 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 3943 break; 3944 case DT_JMPREL: 3945 s = htab->elf.srelplt; 3946 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 3947 break; 3948 case DT_PLTRELSZ: 3949 s = htab->elf.srelplt; 3950 dyn.d_un.d_val = s->size; 3951 break; 3952 default: 3953 continue; 3954 } 3955 3956 bed->s->swap_dyn_out (output_bfd, &dyn, dyncon); 3957 } 3958 return true; 3959} 3960 3961bool 3962tilegx_elf_finish_dynamic_sections (bfd *output_bfd, 3963 struct bfd_link_info *info) 3964{ 3965 bfd *dynobj; 3966 asection *sdyn; 3967 struct tilegx_elf_link_hash_table *htab; 3968 size_t pad_size; 3969 3970 htab = tilegx_elf_hash_table (info); 3971 BFD_ASSERT (htab != NULL); 3972 dynobj = htab->elf.dynobj; 3973 3974 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 3975 3976 if (elf_hash_table (info)->dynamic_sections_created) 3977 { 3978 asection *splt; 3979 bool ret; 3980 3981 splt = htab->elf.splt; 3982 BFD_ASSERT (splt != NULL && sdyn != NULL); 3983 3984 ret = tilegx_finish_dyn (output_bfd, info, dynobj, sdyn, splt); 3985 3986 if (!ret) 3987 return ret; 3988 3989 /* Fill in the head and tail entries in the procedure linkage table. */ 3990 if (splt->size > 0) 3991 { 3992 memcpy (splt->contents, 3993 ABI_64_P (output_bfd) ? 3994 tilegx64_plt0_entry : tilegx32_plt0_entry, 3995 PLT_HEADER_SIZE); 3996 3997 memcpy (splt->contents + splt->size 3998 - PLT_ENTRY_SIZE + PLT_HEADER_SIZE, 3999 ABI_64_P (output_bfd) ? 4000 tilegx64_plt_tail_entry : tilegx32_plt_tail_entry, 4001 PLT_TAIL_SIZE); 4002 /* Add padding so that the plt section is a multiple of its 4003 entry size. */ 4004 pad_size = PLT_ENTRY_SIZE - PLT_HEADER_SIZE - PLT_TAIL_SIZE; 4005 memset (splt->contents + splt->size - pad_size, 0, pad_size); 4006 4007 elf_section_data (splt->output_section)->this_hdr.sh_entsize 4008 = PLT_ENTRY_SIZE; 4009 } 4010 } 4011 4012 if (htab->elf.sgotplt) 4013 { 4014 if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) 4015 { 4016 _bfd_error_handler 4017 (_("discarded output section: `%pA'"), htab->elf.sgotplt); 4018 return false; 4019 } 4020 4021 if (htab->elf.sgotplt->size > 0) 4022 { 4023 /* Write the first two entries in .got.plt, needed for the dynamic 4024 linker. */ 4025 TILEGX_ELF_PUT_WORD (htab, output_bfd, (bfd_vma) -1, 4026 htab->elf.sgotplt->contents); 4027 TILEGX_ELF_PUT_WORD (htab, output_bfd, (bfd_vma) 0, 4028 htab->elf.sgotplt->contents 4029 + GOT_ENTRY_SIZE (htab)); 4030 4031 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4032 GOT_ENTRY_SIZE (htab); 4033 } 4034 } 4035 4036 if (htab->elf.sgot) 4037 { 4038 if (htab->elf.sgot->size > 0) 4039 { 4040 /* Set the first entry in the global offset table to the address of 4041 the dynamic section. */ 4042 bfd_vma val = (sdyn ? 4043 sdyn->output_section->vma + sdyn->output_offset : 4044 0); 4045 TILEGX_ELF_PUT_WORD (htab, output_bfd, val, 4046 htab->elf.sgot->contents); 4047 4048 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4049 GOT_ENTRY_SIZE (htab); 4050 } 4051 } 4052 4053 return true; 4054} 4055 4056 4057 4058/* Return address for Ith PLT stub in section PLT, for relocation REL 4059 or (bfd_vma) -1 if it should not be included. */ 4060 4061bfd_vma 4062tilegx_elf_plt_sym_val (bfd_vma i, const asection *plt, 4063 const arelent *rel ATTRIBUTE_UNUSED) 4064{ 4065 return plt->vma + PLT_HEADER_SIZE + i * PLT_ENTRY_SIZE; 4066} 4067 4068enum elf_reloc_type_class 4069tilegx_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 4070 const asection *rel_sec ATTRIBUTE_UNUSED, 4071 const Elf_Internal_Rela *rela) 4072{ 4073 switch ((int) TILEGX_ELF_R_TYPE (rela->r_info)) 4074 { 4075 case R_TILEGX_RELATIVE: 4076 return reloc_class_relative; 4077 case R_TILEGX_JMP_SLOT: 4078 return reloc_class_plt; 4079 case R_TILEGX_COPY: 4080 return reloc_class_copy; 4081 default: 4082 return reloc_class_normal; 4083 } 4084} 4085 4086int 4087tilegx_additional_program_headers (bfd *abfd, 4088 struct bfd_link_info *info ATTRIBUTE_UNUSED) 4089{ 4090 /* Each .intrpt section specified by the user adds another PT_LOAD 4091 header since the sections are discontiguous. */ 4092 static const char intrpt_sections[4][9] = 4093 { 4094 ".intrpt0", ".intrpt1", ".intrpt2", ".intrpt3" 4095 }; 4096 int count = 0; 4097 int i; 4098 4099 for (i = 0; i < 4; i++) 4100 { 4101 asection *sec = bfd_get_section_by_name (abfd, intrpt_sections[i]); 4102 if (sec != NULL && (sec->flags & SEC_LOAD) != 0) 4103 ++count; 4104 } 4105 4106 /* Add four "padding" headers in to leave room in case a custom linker 4107 script does something fancy. Otherwise ld complains that it ran 4108 out of program headers and refuses to link. */ 4109 count += 4; 4110 4111 return count; 4112} 4113 4114 4115bool 4116_bfd_tilegx_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 4117{ 4118 bfd *obfd = info->output_bfd; 4119 const char *targ1 = bfd_get_target (ibfd); 4120 const char *targ2 = bfd_get_target (obfd); 4121 4122 if (strcmp (targ1, targ2) != 0) 4123 { 4124 _bfd_error_handler 4125 /* xgettext:c-format */ 4126 (_("%pB: cannot link together %s and %s objects"), 4127 ibfd, targ1, targ2); 4128 bfd_set_error (bfd_error_bad_value); 4129 return false; 4130 } 4131 4132 return true; 4133} 4134