1 /* TILE-Gx-specific support for ELF. 2 Copyright 2011, 2012 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 70 static reloc_howto_type tilegx_elf_howto_table [] = 71 { 72 /* This reloc does nothing. */ 73 HOWTO (R_TILEGX_NONE, /* type */ 74 0, /* rightshift */ 75 2, /* size (0 = byte, 1 = short, 2 = long) */ 76 32, /* bitsize */ 77 FALSE, /* pc_relative */ 78 0, /* bitpos */ 79 complain_overflow_bitfield, /* complain_on_overflow */ 80 bfd_elf_generic_reloc, /* special_function */ 81 "R_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 4, /* size (0 = byte, 1 = short, 2 = long) */ 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 2, /* size (0 = byte, 1 = short, 2 = long) */ 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 1, /* size (0 = byte, 1 = short, 2 = long) */ 121 16, /* bitsize */ 122 FALSE, /* pc_relative */ 123 0, /* bitpos */ 124 complain_overflow_bitfield, /* complain_on_overflow */ 125 bfd_elf_generic_reloc, /* special_function */ 126 "R_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 0, /* size (0 = byte, 1 = short, 2 = long) */ 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 4, /* size (0 = byte, 1 = short, 2 = long) */ 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 2, /* size (0 = byte, 1 = short, 2 = long) */ 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 1, /* size (0 = byte, 1 = short, 2 = long) */ 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 0, /* size (0 = byte, 1 = short, 2 = long) */ 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 1, /* size (0 = byte, 1 = short, 2 = long) */ 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 1, /* size (0 = byte, 1 = short, 2 = long) */ 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 1, /* size (0 = byte, 1 = short, 2 = long) */ 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 1, /* size (0 = byte, 1 = short, 2 = long) */ 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 1, /* size (0 = byte, 1 = short, 2 = long) */ 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 1, /* size (0 = byte, 1 = short, 2 = long) */ 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 1, /* size (0 = byte, 1 = short, 2 = long) */ 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 (0 = byte, 1 = short, 2 = long) */ 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 (0 = byte, 1 = short, 2 = long) */ 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 (0 = byte, 1 = short, 2 = long) */ 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 (0 = byte, 1 = short, 2 = long) */ 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 2, /* size (0 = byte, 1 = short, 2 = long) */ 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 2, /* size (0 = byte, 1 = short, 2 = long) */ 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 2, /* size (0 = byte, 1 = short, 2 = long) */ 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, 0, 8), 421 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y0, 0, 8), 422 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X1, 0, 8), 423 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y1, 0, 8), 424 TILEGX_IMM_HOWTO(R_TILEGX_DEST_IMM8_X1, 0, 8), 425 426 TILEGX_UIMM_HOWTO(R_TILEGX_MT_IMM14_X1, 1, 14), 427 TILEGX_UIMM_HOWTO(R_TILEGX_MF_IMM14_X1, 1, 14), 428 429 TILEGX_UIMM_HOWTO(R_TILEGX_MMSTART_X0, 0, 6), 430 TILEGX_UIMM_HOWTO(R_TILEGX_MMEND_X0, 0, 6), 431 432 TILEGX_UIMM_HOWTO(R_TILEGX_SHAMT_X0, 0, 6), 433 TILEGX_UIMM_HOWTO(R_TILEGX_SHAMT_X1, 0, 6), 434 TILEGX_UIMM_HOWTO(R_TILEGX_SHAMT_Y0, 0, 6), 435 TILEGX_UIMM_HOWTO(R_TILEGX_SHAMT_Y1, 0, 6), 436 437 #define TILEGX_IMM16_HOWTO(name, rshift) \ 438 HOWTO (name, rshift, 1, 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, 1, 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, 1, 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, 1, 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 /* These relocs are currently not defined. */ 494 EMPTY_HOWTO (66), 495 EMPTY_HOWTO (67), 496 EMPTY_HOWTO (68), 497 EMPTY_HOWTO (69), 498 EMPTY_HOWTO (70), 499 EMPTY_HOWTO (71), 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 /* These relocs are currently not defined. */ 506 EMPTY_HOWTO (76), 507 EMPTY_HOWTO (77), 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, 1, 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 EMPTY_HOWTO (94), 534 EMPTY_HOWTO (95), 535 EMPTY_HOWTO (96), 536 EMPTY_HOWTO (97), 537 EMPTY_HOWTO (98), 538 EMPTY_HOWTO (99), 539 540 #define TILEGX_IMM16_HOWTO_LAST_TLS_IE(name, rshift) \ 541 HOWTO (name, rshift, 1, 16, FALSE, 0, \ 542 complain_overflow_signed, bfd_elf_generic_reloc, \ 543 #name, FALSE, 0, 0xffff, TRUE) 544 545 TILEGX_IMM16_HOWTO_LAST_TLS_IE (R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE, 0), 546 TILEGX_IMM16_HOWTO_LAST_TLS_IE (R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE, 0), 547 TILEGX_IMM16_HOWTO_LAST_TLS_IE (R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE, 16), 548 TILEGX_IMM16_HOWTO_LAST_TLS_IE (R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE, 16), 549 EMPTY_HOWTO (104), 550 EMPTY_HOWTO (105), 551 552 HOWTO(R_TILEGX_TLS_DTPMOD64, 0, 0, 0, FALSE, 0, complain_overflow_dont, 553 bfd_elf_generic_reloc, "R_TILEGX_TLS_DTPMOD64", 554 FALSE, 0, 0, TRUE), 555 HOWTO(R_TILEGX_TLS_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, 556 bfd_elf_generic_reloc, "R_TILEGX_TLS_DTPOFF64", 557 FALSE, 0, -1, TRUE), 558 HOWTO(R_TILEGX_TLS_TPOFF64, 0, 0, 0, FALSE, 0, complain_overflow_dont, 559 bfd_elf_generic_reloc, "R_TILEGX_TLS_TPOFF64", 560 FALSE, 0, 0, TRUE), 561 562 HOWTO(R_TILEGX_TLS_DTPMOD32, 0, 0, 0, FALSE, 0, complain_overflow_dont, 563 bfd_elf_generic_reloc, "R_TILEGX_TLS_DTPMOD32", 564 FALSE, 0, 0, TRUE), 565 HOWTO(R_TILEGX_TLS_DTPOFF32, 0, 4, 32, FALSE, 0, complain_overflow_bitfield, 566 bfd_elf_generic_reloc, "R_TILEGX_TLS_DTPOFF32", 567 FALSE, 0, -1, TRUE), 568 HOWTO(R_TILEGX_TLS_TPOFF32, 0, 0, 0, FALSE, 0, complain_overflow_dont, 569 bfd_elf_generic_reloc, "R_TILEGX_TLS_TPOFF32", 570 FALSE, 0, 0, TRUE), 571 572 HOWTO (R_TILEGX_TLS_GD_CALL, /* type */ 573 TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES, /* rightshift */ 574 2, /* size (0 = byte, 1 = short, 2 = long) */ 575 27, /* bitsize */ 576 TRUE, /* pc_relative */ 577 0, /* bitpos */ 578 complain_overflow_signed,/* complain_on_overflow */ 579 bfd_elf_generic_reloc, /* special_function */ 580 "R_TILEGX_TLS_GD_CALL", /* name */ 581 FALSE, /* partial_inplace */ 582 0, /* src_mask */ 583 -1, /* dst_mask */ 584 TRUE), /* pcrel_offset */ 585 586 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X0_TLS_GD_ADD, 0, 8), 587 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X1_TLS_GD_ADD, 0, 8), 588 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y0_TLS_GD_ADD, 0, 8), 589 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y1_TLS_GD_ADD, 0, 8), 590 TILEGX_IMM_HOWTO(R_TILEGX_TLS_IE_LOAD, 0, 8), 591 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X0_TLS_ADD, 0, 8), 592 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X1_TLS_ADD, 0, 8), 593 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y0_TLS_ADD, 0, 8), 594 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y1_TLS_ADD, 0, 8), 595 }; 596 597 static reloc_howto_type tilegx_elf_howto_table2 [] = 598 { 599 /* GNU extension to record C++ vtable hierarchy */ 600 HOWTO (R_TILEGX_GNU_VTINHERIT, /* type */ 601 0, /* rightshift */ 602 4, /* size (0 = byte, 1 = short, 2 = long) */ 603 0, /* bitsize */ 604 FALSE, /* pc_relative */ 605 0, /* bitpos */ 606 complain_overflow_dont, /* complain_on_overflow */ 607 NULL, /* special_function */ 608 "R_TILEGX_GNU_VTINHERIT", /* name */ 609 FALSE, /* partial_inplace */ 610 0, /* src_mask */ 611 0, /* dst_mask */ 612 FALSE), /* pcrel_offset */ 613 614 /* GNU extension to record C++ vtable member usage */ 615 HOWTO (R_TILEGX_GNU_VTENTRY, /* type */ 616 0, /* rightshift */ 617 4, /* size (0 = byte, 1 = short, 2 = long) */ 618 0, /* bitsize */ 619 FALSE, /* pc_relative */ 620 0, /* bitpos */ 621 complain_overflow_dont, /* complain_on_overflow */ 622 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 623 "R_TILEGX_GNU_VTENTRY", /* name */ 624 FALSE, /* partial_inplace */ 625 0, /* src_mask */ 626 0, /* dst_mask */ 627 FALSE), /* pcrel_offset */ 628 629 }; 630 631 /* Map BFD reloc types to TILEGX ELF reloc types. */ 632 633 typedef struct tilegx_reloc_map 634 { 635 bfd_reloc_code_real_type bfd_reloc_val; 636 unsigned int tilegx_reloc_val; 637 reloc_howto_type * table; 638 } reloc_map; 639 640 static const reloc_map tilegx_reloc_map [] = 641 { 642 #define TH_REMAP(bfd, tilegx) \ 643 { bfd, tilegx, tilegx_elf_howto_table }, 644 645 /* Standard relocations. */ 646 TH_REMAP (BFD_RELOC_NONE, R_TILEGX_NONE) 647 TH_REMAP (BFD_RELOC_64, R_TILEGX_64) 648 TH_REMAP (BFD_RELOC_32, R_TILEGX_32) 649 TH_REMAP (BFD_RELOC_16, R_TILEGX_16) 650 TH_REMAP (BFD_RELOC_8, R_TILEGX_8) 651 TH_REMAP (BFD_RELOC_64_PCREL, R_TILEGX_64_PCREL) 652 TH_REMAP (BFD_RELOC_32_PCREL, R_TILEGX_32_PCREL) 653 TH_REMAP (BFD_RELOC_16_PCREL, R_TILEGX_16_PCREL) 654 TH_REMAP (BFD_RELOC_8_PCREL, R_TILEGX_8_PCREL) 655 656 #define SIMPLE_REMAP(t) TH_REMAP (BFD_RELOC_##t, R_##t) 657 658 /* Custom relocations. */ 659 SIMPLE_REMAP (TILEGX_HW0) 660 SIMPLE_REMAP (TILEGX_HW1) 661 SIMPLE_REMAP (TILEGX_HW2) 662 SIMPLE_REMAP (TILEGX_HW3) 663 SIMPLE_REMAP (TILEGX_HW0_LAST) 664 SIMPLE_REMAP (TILEGX_HW1_LAST) 665 SIMPLE_REMAP (TILEGX_HW2_LAST) 666 SIMPLE_REMAP (TILEGX_COPY) 667 SIMPLE_REMAP (TILEGX_GLOB_DAT) 668 SIMPLE_REMAP (TILEGX_JMP_SLOT) 669 SIMPLE_REMAP (TILEGX_RELATIVE) 670 SIMPLE_REMAP (TILEGX_BROFF_X1) 671 SIMPLE_REMAP (TILEGX_JUMPOFF_X1) 672 SIMPLE_REMAP (TILEGX_JUMPOFF_X1_PLT) 673 SIMPLE_REMAP (TILEGX_IMM8_X0) 674 SIMPLE_REMAP (TILEGX_IMM8_Y0) 675 SIMPLE_REMAP (TILEGX_IMM8_X1) 676 SIMPLE_REMAP (TILEGX_IMM8_Y1) 677 SIMPLE_REMAP (TILEGX_DEST_IMM8_X1) 678 SIMPLE_REMAP (TILEGX_MT_IMM14_X1) 679 SIMPLE_REMAP (TILEGX_MF_IMM14_X1) 680 SIMPLE_REMAP (TILEGX_MMSTART_X0) 681 SIMPLE_REMAP (TILEGX_MMEND_X0) 682 SIMPLE_REMAP (TILEGX_SHAMT_X0) 683 SIMPLE_REMAP (TILEGX_SHAMT_X1) 684 SIMPLE_REMAP (TILEGX_SHAMT_Y0) 685 SIMPLE_REMAP (TILEGX_SHAMT_Y1) 686 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0) 687 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0) 688 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1) 689 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1) 690 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2) 691 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2) 692 SIMPLE_REMAP (TILEGX_IMM16_X0_HW3) 693 SIMPLE_REMAP (TILEGX_IMM16_X1_HW3) 694 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST) 695 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST) 696 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST) 697 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST) 698 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_LAST) 699 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_LAST) 700 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_PCREL) 701 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_PCREL) 702 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_PCREL) 703 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_PCREL) 704 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_PCREL) 705 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_PCREL) 706 SIMPLE_REMAP (TILEGX_IMM16_X0_HW3_PCREL) 707 SIMPLE_REMAP (TILEGX_IMM16_X1_HW3_PCREL) 708 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_PCREL) 709 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_PCREL) 710 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_PCREL) 711 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_PCREL) 712 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_LAST_PCREL) 713 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_LAST_PCREL) 714 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_GOT) 715 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_GOT) 716 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_GOT) 717 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_GOT) 718 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_GOT) 719 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_GOT) 720 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_TLS_GD) 721 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_TLS_GD) 722 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_TLS_LE) 723 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_TLS_LE) 724 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_TLS_LE) 725 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_TLS_LE) 726 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_TLS_LE) 727 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_TLS_LE) 728 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_TLS_GD) 729 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_TLS_GD) 730 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_TLS_GD) 731 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_TLS_GD) 732 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_TLS_IE) 733 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_TLS_IE) 734 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_TLS_IE) 735 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_TLS_IE) 736 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_TLS_IE) 737 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_TLS_IE) 738 739 SIMPLE_REMAP (TILEGX_TLS_DTPMOD64) 740 SIMPLE_REMAP (TILEGX_TLS_DTPOFF64) 741 SIMPLE_REMAP (TILEGX_TLS_TPOFF64) 742 743 SIMPLE_REMAP (TILEGX_TLS_DTPMOD32) 744 SIMPLE_REMAP (TILEGX_TLS_DTPOFF32) 745 SIMPLE_REMAP (TILEGX_TLS_TPOFF32) 746 747 SIMPLE_REMAP (TILEGX_TLS_GD_CALL) 748 SIMPLE_REMAP (TILEGX_IMM8_X0_TLS_GD_ADD) 749 SIMPLE_REMAP (TILEGX_IMM8_X1_TLS_GD_ADD) 750 SIMPLE_REMAP (TILEGX_IMM8_Y0_TLS_GD_ADD) 751 SIMPLE_REMAP (TILEGX_IMM8_Y1_TLS_GD_ADD) 752 SIMPLE_REMAP (TILEGX_TLS_IE_LOAD) 753 SIMPLE_REMAP (TILEGX_IMM8_X0_TLS_ADD) 754 SIMPLE_REMAP (TILEGX_IMM8_X1_TLS_ADD) 755 SIMPLE_REMAP (TILEGX_IMM8_Y0_TLS_ADD) 756 SIMPLE_REMAP (TILEGX_IMM8_Y1_TLS_ADD) 757 758 #undef SIMPLE_REMAP 759 #undef TH_REMAP 760 761 { BFD_RELOC_VTABLE_INHERIT, R_TILEGX_GNU_VTINHERIT, tilegx_elf_howto_table2 }, 762 { BFD_RELOC_VTABLE_ENTRY, R_TILEGX_GNU_VTENTRY, tilegx_elf_howto_table2 }, 763 }; 764 765 766 767 /* The TILE-Gx linker needs to keep track of the number of relocs that it 768 decides to copy as dynamic relocs in check_relocs for each symbol. 769 This is so that it can later discard them if they are found to be 770 unnecessary. We store the information in a field extending the 771 regular ELF linker hash table. */ 772 773 struct tilegx_elf_dyn_relocs 774 { 775 struct tilegx_elf_dyn_relocs *next; 776 777 /* The input section of the reloc. */ 778 asection *sec; 779 780 /* Total number of relocs copied for the input section. */ 781 bfd_size_type count; 782 783 /* Number of pc-relative relocs copied for the input section. */ 784 bfd_size_type pc_count; 785 }; 786 787 /* TILEGX ELF linker hash entry. */ 788 789 struct tilegx_elf_link_hash_entry 790 { 791 struct elf_link_hash_entry elf; 792 793 /* Track dynamic relocs copied for this symbol. */ 794 struct tilegx_elf_dyn_relocs *dyn_relocs; 795 796 #define GOT_UNKNOWN 0 797 #define GOT_NORMAL 1 798 #define GOT_TLS_GD 2 799 #define GOT_TLS_IE 4 800 unsigned char tls_type; 801 }; 802 803 #define tilegx_elf_hash_entry(ent) \ 804 ((struct tilegx_elf_link_hash_entry *)(ent)) 805 806 struct _bfd_tilegx_elf_obj_tdata 807 { 808 struct elf_obj_tdata root; 809 810 /* tls_type for each local got entry. */ 811 char *local_got_tls_type; 812 }; 813 814 #define _bfd_tilegx_elf_tdata(abfd) \ 815 ((struct _bfd_tilegx_elf_obj_tdata *) (abfd)->tdata.any) 816 817 #define _bfd_tilegx_elf_local_got_tls_type(abfd) \ 818 (_bfd_tilegx_elf_tdata (abfd)->local_got_tls_type) 819 820 #define is_tilegx_elf(bfd) \ 821 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 822 && elf_tdata (bfd) != NULL \ 823 && elf_object_id (bfd) == TILEGX_ELF_DATA) 824 825 #include "elf/common.h" 826 #include "elf/internal.h" 827 828 struct tilegx_elf_link_hash_table 829 { 830 struct elf_link_hash_table elf; 831 832 int bytes_per_word; 833 int word_align_power; 834 int bytes_per_rela; 835 int dtpmod_reloc; 836 int dtpoff_reloc; 837 int tpoff_reloc; 838 bfd_vma (*r_info) (Elf_Internal_Rela *, bfd_vma, bfd_vma); 839 bfd_vma (*r_symndx) (bfd_vma); 840 void (*put_word) (bfd *, bfd_vma, void *); 841 const char *dynamic_interpreter; 842 843 /* Short-cuts to get to dynamic linker sections. */ 844 asection *sdynbss; 845 asection *srelbss; 846 847 /* Whether LE transition has been disabled for some of the 848 sections. */ 849 bfd_boolean disable_le_transition; 850 851 /* Small local sym to section mapping cache. */ 852 struct sym_cache sym_cache; 853 }; 854 855 856 /* Get the Tile ELF linker hash table from a link_info structure. */ 857 #define tilegx_elf_hash_table(p) \ 858 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 859 == TILEGX_ELF_DATA ? ((struct tilegx_elf_link_hash_table *) ((p)->hash)) : NULL) 860 861 #ifdef BFD64 862 static bfd_vma 863 tilegx_elf_r_info_64 (Elf_Internal_Rela *in_rel ATTRIBUTE_UNUSED, 864 bfd_vma rel_index, 865 bfd_vma type) 866 { 867 return ELF64_R_INFO (rel_index, type); 868 } 869 870 static bfd_vma 871 tilegx_elf_r_symndx_64 (bfd_vma r_info) 872 { 873 return ELF64_R_SYM (r_info); 874 } 875 876 static void 877 tilegx_put_word_64 (bfd *abfd, bfd_vma val, void *ptr) 878 { 879 bfd_put_64 (abfd, val, ptr); 880 } 881 #endif /* BFD64 */ 882 883 static bfd_vma 884 tilegx_elf_r_info_32 (Elf_Internal_Rela *in_rel ATTRIBUTE_UNUSED, 885 bfd_vma rel_index, 886 bfd_vma type) 887 { 888 return ELF32_R_INFO (rel_index, type); 889 } 890 891 static bfd_vma 892 tilegx_elf_r_symndx_32 (bfd_vma r_info) 893 { 894 return ELF32_R_SYM (r_info); 895 } 896 897 static void 898 tilegx_put_word_32 (bfd *abfd, bfd_vma val, void *ptr) 899 { 900 bfd_put_32 (abfd, val, ptr); 901 } 902 903 reloc_howto_type * 904 tilegx_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, 905 bfd_reloc_code_real_type code) 906 { 907 unsigned int i; 908 909 for (i = ARRAY_SIZE (tilegx_reloc_map); --i;) 910 { 911 const reloc_map * entry; 912 913 entry = tilegx_reloc_map + i; 914 915 if (entry->bfd_reloc_val == code) 916 return entry->table + (entry->tilegx_reloc_val 917 - entry->table[0].type); 918 } 919 920 return NULL; 921 } 922 923 reloc_howto_type * 924 tilegx_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 925 const char *r_name) 926 { 927 unsigned int i; 928 929 for (i = 0; 930 i < (sizeof (tilegx_elf_howto_table) 931 / sizeof (tilegx_elf_howto_table[0])); 932 i++) 933 if (tilegx_elf_howto_table[i].name != NULL 934 && strcasecmp (tilegx_elf_howto_table[i].name, r_name) == 0) 935 return &tilegx_elf_howto_table[i]; 936 937 return NULL; 938 } 939 940 void 941 tilegx_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, 942 arelent *cache_ptr, 943 Elf_Internal_Rela *dst) 944 { 945 unsigned int r_type = TILEGX_ELF_R_TYPE (dst->r_info); 946 947 if (r_type <= (unsigned int) R_TILEGX_IMM8_Y1_TLS_ADD) 948 cache_ptr->howto = &tilegx_elf_howto_table [r_type]; 949 else if (r_type - R_TILEGX_GNU_VTINHERIT 950 <= (unsigned int) R_TILEGX_GNU_VTENTRY) 951 cache_ptr->howto 952 = &tilegx_elf_howto_table2 [r_type - R_TILEGX_GNU_VTINHERIT]; 953 else 954 abort (); 955 } 956 957 typedef tilegx_bundle_bits (*tilegx_create_func)(int); 958 959 static const tilegx_create_func reloc_to_create_func[] = 960 { 961 /* The first twenty relocation types don't correspond to operands */ 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 NULL, 981 NULL, 982 983 /* The remaining relocations are used for immediate operands */ 984 create_BrOff_X1, 985 create_JumpOff_X1, 986 create_JumpOff_X1, 987 create_Imm8_X0, 988 create_Imm8_Y0, 989 create_Imm8_X1, 990 create_Imm8_Y1, 991 create_Dest_Imm8_X1, 992 create_MT_Imm14_X1, 993 create_MF_Imm14_X1, 994 create_BFStart_X0, 995 create_BFEnd_X0, 996 create_ShAmt_X0, 997 create_ShAmt_X1, 998 create_ShAmt_Y0, 999 create_ShAmt_Y1, 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 NULL, 1031 NULL, 1032 NULL, 1033 NULL, 1034 NULL, 1035 NULL, 1036 create_Imm16_X0, 1037 create_Imm16_X1, 1038 create_Imm16_X0, 1039 create_Imm16_X1, 1040 NULL, 1041 NULL, 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 create_Imm16_X0, 1053 create_Imm16_X1, 1054 NULL, 1055 NULL, 1056 create_Imm16_X0, 1057 create_Imm16_X1, 1058 NULL, 1059 NULL, 1060 NULL, 1061 NULL, 1062 NULL, 1063 NULL, 1064 create_Imm16_X0, 1065 create_Imm16_X1, 1066 create_Imm16_X0, 1067 create_Imm16_X1, 1068 }; 1069 1070 static void 1071 tilegx_elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel) 1072 { 1073 const struct elf_backend_data *bed; 1074 bfd_byte *loc; 1075 1076 bed = get_elf_backend_data (abfd); 1077 loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela); 1078 bed->s->swap_reloca_out (abfd, rel, loc); 1079 } 1080 1081 /* PLT/GOT stuff */ 1082 1083 /* The procedure linkage table starts with the following header: 1084 1085 ld_add r28, r27, 8 1086 ld r27, r27 1087 { 1088 jr r27 1089 info 10 ## SP not offset, return PC in LR 1090 } 1091 1092 Subsequent entries are the following, jumping to the header at the end: 1093 1094 { 1095 moveli r28, <_GLOBAL_OFFSET_TABLE_ - 1f + MY_GOT_OFFSET> 1096 lnk r26 1097 } 1098 1: 1099 { 1100 moveli r27, <_GLOBAL_OFFSET_TABLE_ - 1b> 1101 shl16insli r28, r28, <_GLOBAL_OFFSET_TABLE_ - 1b + MY_GOT_OFFSET> 1102 } 1103 { 1104 add r28, r26, r28 1105 shl16insli r27, r27, <_GLOBAL_OFFSET_TABLE_ - 1b> 1106 } 1107 { 1108 add r27, r26, r27 1109 ld r28, r28 1110 info 10 ## SP not offset, return PC in LR 1111 } 1112 { 1113 shl16insli r29, zero, MY_PLT_INDEX 1114 jr r28 1115 } 1116 1117 This code sequence lets the code at at the start of the PLT determine 1118 which PLT entry was executed by examining 'r29'. 1119 1120 Note that MY_PLT_INDEX skips over the header entries, so the first 1121 actual jump table entry has index zero. 1122 1123 If the offset fits in 16 bits, 1124 1125 lnk r26 1126 1: 1127 { 1128 addli r28, r26, <_GLOBAL_OFFSET_TABLE_ - 1b + MY_GOT_OFFSET> 1129 moveli r27, <_GLOBAL_OFFSET_TABLE_ - 1b> 1130 } 1131 { 1132 shl16insli r29, zero, MY_PLT_INDEX 1133 ld r28, r28 1134 } 1135 { 1136 add r27, r26, r27 1137 jr r28 1138 } 1139 info 10 ## SP not offset, return PC in LR 1140 1141 For the purpose of backtracing, the procedure linkage table ends with the 1142 following tail entry: 1143 1144 info 10 ## SP not offset, return PC in LR 1145 1146 The 32-bit versions are similar, with ld4s replacing ld, and offsets into 1147 the GOT being multiples of 4 instead of 8. 1148 1149 */ 1150 1151 #define PLT_HEADER_SIZE_IN_BUNDLES 3 1152 #define PLT_ENTRY_SIZE_IN_BUNDLES 5 1153 #define PLT_TAIL_SIZE_IN_BUNDLES 1 1154 1155 #define PLT_HEADER_SIZE \ 1156 (PLT_HEADER_SIZE_IN_BUNDLES * TILEGX_BUNDLE_SIZE_IN_BYTES) 1157 #define PLT_ENTRY_SIZE \ 1158 (PLT_ENTRY_SIZE_IN_BUNDLES * TILEGX_BUNDLE_SIZE_IN_BYTES) 1159 #define PLT_TAIL_SIZE \ 1160 (PLT_TAIL_SIZE_IN_BUNDLES * TILEGX_BUNDLE_SIZE_IN_BYTES) 1161 1162 #define GOT_ENTRY_SIZE(htab) TILEGX_ELF_WORD_BYTES (htab) 1163 1164 #define GOTPLT_HEADER_SIZE(htab) (2 * GOT_ENTRY_SIZE (htab)) 1165 1166 static const bfd_byte 1167 tilegx64_plt0_entry[PLT_HEADER_SIZE] = 1168 { 1169 0x00, 0x30, 0x48, 0x51, 1170 0x6e, 0x43, 0xa0, 0x18, /* { ld_add r28, r27, 8 } */ 1171 0x00, 0x30, 0xbc, 0x35, 1172 0x00, 0x40, 0xde, 0x9e, /* { ld r27, r27 } */ 1173 0xff, 0xaf, 0x30, 0x40, 1174 0x60, 0x73, 0x6a, 0x28, /* { info 10 ; jr r27 } */ 1175 }; 1176 1177 static const bfd_byte 1178 tilegx64_long_plt_entry[PLT_ENTRY_SIZE] = 1179 { 1180 0xdc, 0x0f, 0x00, 0x10, 1181 0x0d, 0xf0, 0x6a, 0x28, /* { moveli r28, 0 ; lnk r26 } */ 1182 0xdb, 0x0f, 0x00, 0x10, 1183 0x8e, 0x03, 0x00, 0x38, /* { moveli r27, 0 ; shl16insli r28, r28, 0 } */ 1184 0x9c, 0xc6, 0x0d, 0xd0, 1185 0x6d, 0x03, 0x00, 0x38, /* { add r28, r26, r28 ; shl16insli r27, r27, 0 } */ 1186 0x9b, 0xb6, 0xc5, 0xad, 1187 0xff, 0x57, 0xe0, 0x8e, /* { add r27, r26, r27 ; info 10 ; ld r28, r28 } */ 1188 0xdd, 0x0f, 0x00, 0x70, 1189 0x80, 0x73, 0x6a, 0x28, /* { shl16insli r29, zero, 0 ; jr r28 } */ 1190 }; 1191 1192 static const bfd_byte 1193 tilegx64_short_plt_entry[PLT_ENTRY_SIZE] = 1194 { 1195 0x00, 0x30, 0x48, 0x51, 1196 0x0d, 0xf0, 0x6a, 0x28, /* { lnk r26 } */ 1197 0x9c, 0x06, 0x00, 0x90, 1198 0xed, 0x07, 0x00, 0x00, /* { addli r28, r26, 0 ; moveli r27, 0 } */ 1199 0xdd, 0x0f, 0x00, 0x70, 1200 0x8e, 0xeb, 0x6a, 0x28, /* { shl16insli r29, zero, 0 ; ld r28, r28 } */ 1201 0x9b, 0xb6, 0x0d, 0x50, 1202 0x80, 0x73, 0x6a, 0x28, /* { add r27, r26, r27 ; jr r28 } */ 1203 0x00, 0x30, 0x48, 0xd1, 1204 0xff, 0x57, 0x18, 0x18, /* { info 10 } */ 1205 }; 1206 1207 /* Reuse an existing info 10 bundle. */ 1208 static const bfd_byte const *tilegx64_plt_tail_entry = 1209 &tilegx64_short_plt_entry[4 * TILEGX_BUNDLE_SIZE_IN_BYTES]; 1210 1211 static const bfd_byte 1212 tilegx32_plt0_entry[PLT_HEADER_SIZE] = 1213 { 1214 0x00, 0x30, 0x48, 0x51, 1215 0x6e, 0x23, 0x58, 0x18, /* { ld4s_add r28, r27, 4 } */ 1216 0x00, 0x30, 0xbc, 0x35, 1217 0x00, 0x40, 0xde, 0x9c, /* { ld4s r27, r27 } */ 1218 0xff, 0xaf, 0x30, 0x40, 1219 0x60, 0x73, 0x6a, 0x28, /* { info 10 ; jr r27 } */ 1220 }; 1221 1222 static const bfd_byte 1223 tilegx32_long_plt_entry[PLT_ENTRY_SIZE] = 1224 { 1225 0xdc, 0x0f, 0x00, 0x10, 1226 0x0d, 0xf0, 0x6a, 0x28, /* { moveli r28, 0 ; lnk r26 } */ 1227 0xdb, 0x0f, 0x00, 0x10, 1228 0x8e, 0x03, 0x00, 0x38, /* { moveli r27, 0 ; shl16insli r28, r28, 0 } */ 1229 0x9c, 0xc6, 0x0d, 0xd0, 1230 0x6d, 0x03, 0x00, 0x38, /* { add r28, r26, r28 ; shl16insli r27, r27, 0 } */ 1231 0x9b, 0xb6, 0xc5, 0xad, 1232 0xff, 0x57, 0xe0, 0x8c, /* { add r27, r26, r27 ; info 10 ; ld4s r28, r28 } */ 1233 0xdd, 0x0f, 0x00, 0x70, 1234 0x80, 0x73, 0x6a, 0x28, /* { shl16insli r29, zero, 0 ; jr r28 } */ 1235 }; 1236 1237 static const bfd_byte 1238 tilegx32_short_plt_entry[PLT_ENTRY_SIZE] = 1239 { 1240 0x00, 0x30, 0x48, 0x51, 1241 0x0d, 0xf0, 0x6a, 0x28, /* { lnk r26 } */ 1242 0x9c, 0x06, 0x00, 0x90, 1243 0xed, 0x07, 0x00, 0x00, /* { addli r28, r26, 0 ; moveli r27, 0 } */ 1244 0xdd, 0x0f, 0x00, 0x70, 1245 0x8e, 0x9b, 0x6a, 0x28, /* { shl16insli r29, zero, 0 ; ld4s r28, r28 } */ 1246 0x9b, 0xb6, 0x0d, 0x50, 1247 0x80, 0x73, 0x6a, 0x28, /* { add r27, r26, r27 ; jr r28 } */ 1248 0x00, 0x30, 0x48, 0xd1, 1249 0xff, 0x57, 0x18, 0x18, /* { info 10 } */ 1250 }; 1251 1252 /* Reuse an existing info 10 bundle. */ 1253 static const bfd_byte const *tilegx32_plt_tail_entry = 1254 &tilegx64_short_plt_entry[4 * TILEGX_BUNDLE_SIZE_IN_BYTES]; 1255 1256 static int 1257 tilegx_plt_entry_build (bfd *output_bfd, 1258 struct tilegx_elf_link_hash_table *htab, 1259 asection *splt, asection *sgotplt, 1260 bfd_vma offset, bfd_vma *r_offset) 1261 { 1262 int plt_index = (offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; 1263 int got_offset = (plt_index * GOT_ENTRY_SIZE (htab) 1264 + GOTPLT_HEADER_SIZE (htab)); 1265 tilegx_bundle_bits *pc; 1266 1267 /* Compute the distance from the got entry to the lnk. */ 1268 bfd_signed_vma dist_got_entry = sgotplt->output_section->vma 1269 + sgotplt->output_offset 1270 + got_offset 1271 - splt->output_section->vma 1272 - splt->output_offset 1273 - offset 1274 - TILEGX_BUNDLE_SIZE_IN_BYTES; 1275 1276 /* Compute the distance to GOTPLT[0]. */ 1277 bfd_signed_vma dist_got0 = dist_got_entry - got_offset; 1278 1279 /* Check whether we can use the short plt entry with 16-bit offset. */ 1280 bfd_boolean short_plt_entry = 1281 (dist_got_entry <= 0x7fff && dist_got0 >= -0x8000); 1282 1283 const tilegx_bundle_bits *plt_entry = (tilegx_bundle_bits *) 1284 (ABI_64_P (output_bfd) ? 1285 (short_plt_entry ? tilegx64_short_plt_entry : tilegx64_long_plt_entry) : 1286 (short_plt_entry ? tilegx32_short_plt_entry : tilegx32_long_plt_entry)); 1287 1288 /* Copy the plt entry template. */ 1289 memcpy (splt->contents + offset, plt_entry, PLT_ENTRY_SIZE); 1290 1291 /* Write the immediate offsets. */ 1292 pc = (tilegx_bundle_bits *)(splt->contents + offset); 1293 1294 if (short_plt_entry) 1295 { 1296 /* { lnk r28 } */ 1297 pc++; 1298 1299 /* { addli r28, r28, &GOTPLT[MY_GOT_INDEX] ; moveli r27, &GOTPLT[0] } */ 1300 *pc++ |= create_Imm16_X0 (dist_got_entry) 1301 | create_Imm16_X1 (dist_got0); 1302 1303 /* { shl16insli r29, zero, MY_PLT_INDEX ; ld r28, r28 } */ 1304 *pc++ |= create_Imm16_X0 (plt_index); 1305 } 1306 else 1307 { 1308 /* { moveli r28, &GOTPLT[MY_GOT_INDEX] ; lnk r26 } */ 1309 *pc++ |= create_Imm16_X0 (dist_got_entry >> 16); 1310 1311 /* { moveli r27, &GOTPLT[0] ; 1312 shl16insli r28, r28, &GOTPLT[MY_GOT_INDEX] } */ 1313 *pc++ |= create_Imm16_X0 (dist_got0 >> 16) 1314 | create_Imm16_X1 (dist_got_entry); 1315 1316 /* { add r28, r26, r28 ; shl16insli r27, r27, &GOTPLT[0] } */ 1317 *pc++ |= create_Imm16_X1 (dist_got0); 1318 1319 /* { add r27, r26, r27 ; info 10 ; ld r28, r28 } */ 1320 pc++; 1321 1322 /* { shl16insli r29, zero, MY_GOT_INDEX ; jr r28 } */ 1323 *pc++ |= create_Imm16_X0 (plt_index); 1324 } 1325 1326 /* Set the relocation offset. */ 1327 *r_offset = got_offset; 1328 1329 return plt_index; 1330 } 1331 1332 /* Create an entry in an TILEGX ELF linker hash table. */ 1333 1334 static struct bfd_hash_entry * 1335 link_hash_newfunc (struct bfd_hash_entry *entry, 1336 struct bfd_hash_table *table, const char *string) 1337 { 1338 /* Allocate the structure if it has not already been allocated by a 1339 subclass. */ 1340 if (entry == NULL) 1341 { 1342 entry = 1343 bfd_hash_allocate (table, 1344 sizeof (struct tilegx_elf_link_hash_entry)); 1345 if (entry == NULL) 1346 return entry; 1347 } 1348 1349 /* Call the allocation method of the superclass. */ 1350 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 1351 if (entry != NULL) 1352 { 1353 struct tilegx_elf_link_hash_entry *eh; 1354 1355 eh = (struct tilegx_elf_link_hash_entry *) entry; 1356 eh->dyn_relocs = NULL; 1357 eh->tls_type = GOT_UNKNOWN; 1358 } 1359 1360 return entry; 1361 } 1362 1363 /* Create a TILEGX ELF linker hash table. */ 1364 1365 struct bfd_link_hash_table * 1366 tilegx_elf_link_hash_table_create (bfd *abfd) 1367 { 1368 struct tilegx_elf_link_hash_table *ret; 1369 bfd_size_type amt = sizeof (struct tilegx_elf_link_hash_table); 1370 1371 ret = (struct tilegx_elf_link_hash_table *) bfd_zmalloc (amt); 1372 if (ret == NULL) 1373 return NULL; 1374 1375 #ifdef BFD64 1376 if (ABI_64_P (abfd)) 1377 { 1378 ret->bytes_per_word = 8; 1379 ret->word_align_power = 3; 1380 ret->bytes_per_rela = sizeof (Elf64_External_Rela); 1381 ret->dtpoff_reloc = R_TILEGX_TLS_DTPOFF64; 1382 ret->dtpmod_reloc = R_TILEGX_TLS_DTPMOD64; 1383 ret->tpoff_reloc = R_TILEGX_TLS_TPOFF64; 1384 ret->r_info = tilegx_elf_r_info_64; 1385 ret->r_symndx = tilegx_elf_r_symndx_64; 1386 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; 1387 ret->put_word = tilegx_put_word_64; 1388 } 1389 else 1390 #endif 1391 { 1392 ret->bytes_per_word = 4; 1393 ret->word_align_power = 2; 1394 ret->bytes_per_rela = sizeof (Elf32_External_Rela); 1395 ret->dtpoff_reloc = R_TILEGX_TLS_DTPOFF32; 1396 ret->dtpmod_reloc = R_TILEGX_TLS_DTPMOD32; 1397 ret->tpoff_reloc = R_TILEGX_TLS_TPOFF32; 1398 ret->r_info = tilegx_elf_r_info_32; 1399 ret->r_symndx = tilegx_elf_r_symndx_32; 1400 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; 1401 ret->put_word = tilegx_put_word_32; 1402 } 1403 1404 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, 1405 sizeof (struct tilegx_elf_link_hash_entry), 1406 TILEGX_ELF_DATA)) 1407 { 1408 free (ret); 1409 return NULL; 1410 } 1411 1412 return &ret->elf.root; 1413 } 1414 1415 /* Create the .got section. */ 1416 1417 static bfd_boolean 1418 tilegx_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) 1419 { 1420 flagword flags; 1421 asection *s, *s_got; 1422 struct elf_link_hash_entry *h; 1423 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 1424 struct elf_link_hash_table *htab = elf_hash_table (info); 1425 1426 /* This function may be called more than once. */ 1427 s = bfd_get_linker_section (abfd, ".got"); 1428 if (s != NULL) 1429 return TRUE; 1430 1431 flags = bed->dynamic_sec_flags; 1432 1433 s = bfd_make_section_anyway_with_flags (abfd, 1434 (bed->rela_plts_and_copies_p 1435 ? ".rela.got" : ".rel.got"), 1436 (bed->dynamic_sec_flags 1437 | SEC_READONLY)); 1438 if (s == NULL 1439 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) 1440 return FALSE; 1441 htab->srelgot = s; 1442 1443 s = s_got = bfd_make_section_anyway_with_flags (abfd, ".got", flags); 1444 if (s == NULL 1445 || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) 1446 return FALSE; 1447 htab->sgot = s; 1448 1449 /* The first bit of the global offset table is the header. */ 1450 s->size += bed->got_header_size; 1451 1452 if (bed->want_got_plt) 1453 { 1454 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); 1455 if (s == NULL 1456 || !bfd_set_section_alignment (abfd, s, 1457 bed->s->log_file_align)) 1458 return FALSE; 1459 htab->sgotplt = s; 1460 1461 /* Reserve room for the header. */ 1462 s->size += GOTPLT_HEADER_SIZE (tilegx_elf_hash_table (info)); 1463 } 1464 1465 if (bed->want_got_sym) 1466 { 1467 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got 1468 section. We don't do this in the linker script because we don't want 1469 to define the symbol if we are not creating a global offset 1470 table. */ 1471 h = _bfd_elf_define_linkage_sym (abfd, info, s_got, 1472 "_GLOBAL_OFFSET_TABLE_"); 1473 elf_hash_table (info)->hgot = h; 1474 if (h == NULL) 1475 return FALSE; 1476 } 1477 1478 return TRUE; 1479 } 1480 1481 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and 1482 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our 1483 hash table. */ 1484 1485 bfd_boolean 1486 tilegx_elf_create_dynamic_sections (bfd *dynobj, 1487 struct bfd_link_info *info) 1488 { 1489 struct tilegx_elf_link_hash_table *htab; 1490 1491 htab = tilegx_elf_hash_table (info); 1492 BFD_ASSERT (htab != NULL); 1493 1494 if (!tilegx_elf_create_got_section (dynobj, info)) 1495 return FALSE; 1496 1497 if (!_bfd_elf_create_dynamic_sections (dynobj, info)) 1498 return FALSE; 1499 1500 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); 1501 if (!info->shared) 1502 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); 1503 1504 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss 1505 || (!info->shared && !htab->srelbss)) 1506 abort (); 1507 1508 return TRUE; 1509 } 1510 1511 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 1512 1513 void 1514 tilegx_elf_copy_indirect_symbol (struct bfd_link_info *info, 1515 struct elf_link_hash_entry *dir, 1516 struct elf_link_hash_entry *ind) 1517 { 1518 struct tilegx_elf_link_hash_entry *edir, *eind; 1519 1520 edir = (struct tilegx_elf_link_hash_entry *) dir; 1521 eind = (struct tilegx_elf_link_hash_entry *) ind; 1522 1523 if (eind->dyn_relocs != NULL) 1524 { 1525 if (edir->dyn_relocs != NULL) 1526 { 1527 struct tilegx_elf_dyn_relocs **pp; 1528 struct tilegx_elf_dyn_relocs *p; 1529 1530 /* Add reloc counts against the indirect sym to the direct sym 1531 list. Merge any entries against the same section. */ 1532 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 1533 { 1534 struct tilegx_elf_dyn_relocs *q; 1535 1536 for (q = edir->dyn_relocs; q != NULL; q = q->next) 1537 if (q->sec == p->sec) 1538 { 1539 q->pc_count += p->pc_count; 1540 q->count += p->count; 1541 *pp = p->next; 1542 break; 1543 } 1544 if (q == NULL) 1545 pp = &p->next; 1546 } 1547 *pp = edir->dyn_relocs; 1548 } 1549 1550 edir->dyn_relocs = eind->dyn_relocs; 1551 eind->dyn_relocs = NULL; 1552 } 1553 1554 if (ind->root.type == bfd_link_hash_indirect 1555 && dir->got.refcount <= 0) 1556 { 1557 edir->tls_type = eind->tls_type; 1558 eind->tls_type = GOT_UNKNOWN; 1559 } 1560 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 1561 } 1562 1563 static int 1564 tilegx_tls_translate_to_le (int r_type) 1565 { 1566 switch (r_type) 1567 { 1568 case R_TILEGX_IMM16_X0_HW0_TLS_GD: 1569 case R_TILEGX_IMM16_X0_HW0_TLS_IE: 1570 return R_TILEGX_IMM16_X0_HW0_TLS_LE; 1571 1572 case R_TILEGX_IMM16_X1_HW0_TLS_GD: 1573 case R_TILEGX_IMM16_X1_HW0_TLS_IE: 1574 return R_TILEGX_IMM16_X1_HW0_TLS_LE; 1575 1576 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD: 1577 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE: 1578 return R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE; 1579 1580 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD: 1581 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE: 1582 return R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE; 1583 1584 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD: 1585 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE: 1586 return R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE; 1587 1588 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD: 1589 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE: 1590 return R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE; 1591 } 1592 return r_type; 1593 } 1594 1595 static int 1596 tilegx_tls_translate_to_ie (int r_type) 1597 { 1598 switch (r_type) 1599 { 1600 case R_TILEGX_IMM16_X0_HW0_TLS_GD: 1601 case R_TILEGX_IMM16_X0_HW0_TLS_IE: 1602 return R_TILEGX_IMM16_X0_HW0_TLS_IE; 1603 1604 case R_TILEGX_IMM16_X1_HW0_TLS_GD: 1605 case R_TILEGX_IMM16_X1_HW0_TLS_IE: 1606 return R_TILEGX_IMM16_X1_HW0_TLS_IE; 1607 1608 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD: 1609 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE: 1610 return R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE; 1611 1612 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD: 1613 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE: 1614 return R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE; 1615 1616 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD: 1617 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE: 1618 return R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE; 1619 1620 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD: 1621 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE: 1622 return R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE; 1623 } 1624 return r_type; 1625 } 1626 1627 static int 1628 tilegx_elf_tls_transition (struct bfd_link_info *info, int r_type, 1629 int is_local, bfd_boolean disable_le_transition) 1630 { 1631 if (info->shared) 1632 return r_type; 1633 1634 if (is_local && !disable_le_transition) 1635 return tilegx_tls_translate_to_le (r_type); 1636 else 1637 return tilegx_tls_translate_to_ie (r_type); 1638 } 1639 1640 /* Look through the relocs for a section during the first phase, and 1641 allocate space in the global offset table or procedure linkage 1642 table. */ 1643 1644 bfd_boolean 1645 tilegx_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, 1646 asection *sec, const Elf_Internal_Rela *relocs) 1647 { 1648 struct tilegx_elf_link_hash_table *htab; 1649 Elf_Internal_Shdr *symtab_hdr; 1650 struct elf_link_hash_entry **sym_hashes; 1651 const Elf_Internal_Rela *rel; 1652 const Elf_Internal_Rela *rel_end; 1653 asection *sreloc; 1654 int num_relocs; 1655 bfd_boolean has_tls_gd_or_ie = FALSE, has_tls_add = FALSE; 1656 1657 if (info->relocatable) 1658 return TRUE; 1659 1660 htab = tilegx_elf_hash_table (info); 1661 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1662 sym_hashes = elf_sym_hashes (abfd); 1663 1664 sreloc = NULL; 1665 1666 num_relocs = sec->reloc_count; 1667 1668 BFD_ASSERT (is_tilegx_elf (abfd) || num_relocs == 0); 1669 1670 if (htab->elf.dynobj == NULL) 1671 htab->elf.dynobj = abfd; 1672 1673 rel_end = relocs + num_relocs; 1674 1675 /* Check whether to do optimization to transform TLS GD/IE 1676 referehces to TLS LE. We disable it if we're linking with old 1677 TLS code sequences that do not support such optimization. Old 1678 TLS code sequences have tls_gd_call/tls_ie_load relocations but 1679 no tls_add relocations. */ 1680 for (rel = relocs; rel < rel_end && !has_tls_add; rel++) 1681 { 1682 int r_type = TILEGX_ELF_R_TYPE (rel->r_info); 1683 switch (r_type) 1684 { 1685 case R_TILEGX_TLS_GD_CALL: 1686 case R_TILEGX_TLS_IE_LOAD: 1687 has_tls_gd_or_ie = TRUE; 1688 break; 1689 case R_TILEGX_IMM8_X0_TLS_ADD: 1690 case R_TILEGX_IMM8_Y0_TLS_ADD: 1691 case R_TILEGX_IMM8_X1_TLS_ADD: 1692 case R_TILEGX_IMM8_Y1_TLS_ADD: 1693 has_tls_add = TRUE; 1694 break; 1695 } 1696 } 1697 1698 sec->sec_flg0 = (has_tls_gd_or_ie && !has_tls_add); 1699 htab->disable_le_transition |= sec->sec_flg0; 1700 1701 for (rel = relocs; rel < rel_end; rel++) 1702 { 1703 unsigned int r_type; 1704 unsigned long r_symndx; 1705 struct elf_link_hash_entry *h; 1706 int tls_type; 1707 1708 r_symndx = TILEGX_ELF_R_SYMNDX (htab, rel->r_info); 1709 r_type = TILEGX_ELF_R_TYPE (rel->r_info); 1710 1711 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) 1712 { 1713 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), 1714 abfd, r_symndx); 1715 return FALSE; 1716 } 1717 1718 if (r_symndx < symtab_hdr->sh_info) 1719 h = NULL; 1720 else 1721 { 1722 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1723 while (h->root.type == bfd_link_hash_indirect 1724 || h->root.type == bfd_link_hash_warning) 1725 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1726 } 1727 1728 r_type = tilegx_elf_tls_transition (info, r_type, h == NULL, 1729 sec->sec_flg0); 1730 switch (r_type) 1731 { 1732 case R_TILEGX_IMM16_X0_HW0_TLS_LE: 1733 case R_TILEGX_IMM16_X1_HW0_TLS_LE: 1734 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE: 1735 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE: 1736 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE: 1737 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE: 1738 if (info->shared) 1739 goto r_tilegx_plt32; 1740 break; 1741 1742 case R_TILEGX_IMM16_X0_HW0_TLS_GD: 1743 case R_TILEGX_IMM16_X1_HW0_TLS_GD: 1744 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD: 1745 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD: 1746 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD: 1747 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD: 1748 BFD_ASSERT (info->shared); 1749 tls_type = GOT_TLS_GD; 1750 goto have_got_reference; 1751 1752 case R_TILEGX_IMM16_X0_HW0_TLS_IE: 1753 case R_TILEGX_IMM16_X1_HW0_TLS_IE: 1754 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE: 1755 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE: 1756 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE: 1757 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE: 1758 tls_type = GOT_TLS_IE; 1759 if (info->shared) 1760 info->flags |= DF_STATIC_TLS; 1761 goto have_got_reference; 1762 1763 case R_TILEGX_IMM16_X0_HW0_GOT: 1764 case R_TILEGX_IMM16_X1_HW0_GOT: 1765 case R_TILEGX_IMM16_X0_HW0_LAST_GOT: 1766 case R_TILEGX_IMM16_X1_HW0_LAST_GOT: 1767 case R_TILEGX_IMM16_X0_HW1_LAST_GOT: 1768 case R_TILEGX_IMM16_X1_HW1_LAST_GOT: 1769 tls_type = GOT_NORMAL; 1770 /* Fall Through */ 1771 1772 have_got_reference: 1773 /* This symbol requires a global offset table entry. */ 1774 { 1775 int old_tls_type; 1776 1777 if (h != NULL) 1778 { 1779 h->got.refcount += 1; 1780 old_tls_type = tilegx_elf_hash_entry(h)->tls_type; 1781 } 1782 else 1783 { 1784 bfd_signed_vma *local_got_refcounts; 1785 1786 /* This is a global offset table entry for a local symbol. */ 1787 local_got_refcounts = elf_local_got_refcounts (abfd); 1788 if (local_got_refcounts == NULL) 1789 { 1790 bfd_size_type size; 1791 1792 size = symtab_hdr->sh_info; 1793 size *= (sizeof (bfd_signed_vma) + sizeof(char)); 1794 local_got_refcounts = ((bfd_signed_vma *) 1795 bfd_zalloc (abfd, size)); 1796 if (local_got_refcounts == NULL) 1797 return FALSE; 1798 elf_local_got_refcounts (abfd) = local_got_refcounts; 1799 _bfd_tilegx_elf_local_got_tls_type (abfd) 1800 = (char *) (local_got_refcounts + symtab_hdr->sh_info); 1801 } 1802 local_got_refcounts[r_symndx] += 1; 1803 old_tls_type = _bfd_tilegx_elf_local_got_tls_type (abfd) [r_symndx]; 1804 } 1805 1806 /* If a TLS symbol is accessed using IE at least once, 1807 there is no point to use dynamic model for it. */ 1808 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN 1809 && (old_tls_type != GOT_TLS_GD 1810 || tls_type != GOT_TLS_IE)) 1811 { 1812 if (old_tls_type == GOT_TLS_IE && tls_type == GOT_TLS_GD) 1813 tls_type = old_tls_type; 1814 else 1815 { 1816 (*_bfd_error_handler) 1817 (_("%B: `%s' accessed both as normal and thread local symbol"), 1818 abfd, h ? h->root.root.string : "<local>"); 1819 return FALSE; 1820 } 1821 } 1822 1823 if (old_tls_type != tls_type) 1824 { 1825 if (h != NULL) 1826 tilegx_elf_hash_entry (h)->tls_type = tls_type; 1827 else 1828 _bfd_tilegx_elf_local_got_tls_type (abfd) [r_symndx] = tls_type; 1829 } 1830 } 1831 1832 if (htab->elf.sgot == NULL) 1833 { 1834 if (!tilegx_elf_create_got_section (htab->elf.dynobj, info)) 1835 return FALSE; 1836 } 1837 break; 1838 1839 case R_TILEGX_TLS_GD_CALL: 1840 if (info->shared) 1841 { 1842 /* These are basically R_TILEGX_JUMPOFF_X1_PLT relocs 1843 against __tls_get_addr. */ 1844 struct bfd_link_hash_entry *bh = NULL; 1845 if (! _bfd_generic_link_add_one_symbol (info, abfd, 1846 "__tls_get_addr", 0, 1847 bfd_und_section_ptr, 0, 1848 NULL, FALSE, FALSE, 1849 &bh)) 1850 return FALSE; 1851 h = (struct elf_link_hash_entry *) bh; 1852 } 1853 else 1854 break; 1855 /* Fall through */ 1856 1857 case R_TILEGX_JUMPOFF_X1_PLT: 1858 /* This symbol requires a procedure linkage table entry. We 1859 actually build the entry in adjust_dynamic_symbol, 1860 because this might be a case of linking PIC code without 1861 linking in any dynamic objects, in which case we don't 1862 need to generate a procedure linkage table after all. */ 1863 1864 if (h != NULL) 1865 { 1866 h->needs_plt = 1; 1867 h->plt.refcount += 1; 1868 } 1869 break; 1870 1871 case R_TILEGX_64_PCREL: 1872 case R_TILEGX_32_PCREL: 1873 case R_TILEGX_16_PCREL: 1874 case R_TILEGX_8_PCREL: 1875 case R_TILEGX_IMM16_X0_HW0_PCREL: 1876 case R_TILEGX_IMM16_X1_HW0_PCREL: 1877 case R_TILEGX_IMM16_X0_HW1_PCREL: 1878 case R_TILEGX_IMM16_X1_HW1_PCREL: 1879 case R_TILEGX_IMM16_X0_HW2_PCREL: 1880 case R_TILEGX_IMM16_X1_HW2_PCREL: 1881 case R_TILEGX_IMM16_X0_HW3_PCREL: 1882 case R_TILEGX_IMM16_X1_HW3_PCREL: 1883 case R_TILEGX_IMM16_X0_HW0_LAST_PCREL: 1884 case R_TILEGX_IMM16_X1_HW0_LAST_PCREL: 1885 case R_TILEGX_IMM16_X0_HW1_LAST_PCREL: 1886 case R_TILEGX_IMM16_X1_HW1_LAST_PCREL: 1887 case R_TILEGX_IMM16_X0_HW2_LAST_PCREL: 1888 case R_TILEGX_IMM16_X1_HW2_LAST_PCREL: 1889 if (h != NULL) 1890 h->non_got_ref = 1; 1891 1892 if (h != NULL 1893 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 1894 break; 1895 /* Fall through. */ 1896 1897 case R_TILEGX_64: 1898 case R_TILEGX_32: 1899 case R_TILEGX_16: 1900 case R_TILEGX_8: 1901 case R_TILEGX_HW0: 1902 case R_TILEGX_HW1: 1903 case R_TILEGX_HW2: 1904 case R_TILEGX_HW3: 1905 case R_TILEGX_HW0_LAST: 1906 case R_TILEGX_HW1_LAST: 1907 case R_TILEGX_HW2_LAST: 1908 case R_TILEGX_COPY: 1909 case R_TILEGX_GLOB_DAT: 1910 case R_TILEGX_JMP_SLOT: 1911 case R_TILEGX_RELATIVE: 1912 case R_TILEGX_BROFF_X1: 1913 case R_TILEGX_JUMPOFF_X1: 1914 case R_TILEGX_IMM8_X0: 1915 case R_TILEGX_IMM8_Y0: 1916 case R_TILEGX_IMM8_X1: 1917 case R_TILEGX_IMM8_Y1: 1918 case R_TILEGX_DEST_IMM8_X1: 1919 case R_TILEGX_MT_IMM14_X1: 1920 case R_TILEGX_MF_IMM14_X1: 1921 case R_TILEGX_MMSTART_X0: 1922 case R_TILEGX_MMEND_X0: 1923 case R_TILEGX_SHAMT_X0: 1924 case R_TILEGX_SHAMT_X1: 1925 case R_TILEGX_SHAMT_Y0: 1926 case R_TILEGX_SHAMT_Y1: 1927 case R_TILEGX_IMM16_X0_HW0: 1928 case R_TILEGX_IMM16_X1_HW0: 1929 case R_TILEGX_IMM16_X0_HW1: 1930 case R_TILEGX_IMM16_X1_HW1: 1931 case R_TILEGX_IMM16_X0_HW2: 1932 case R_TILEGX_IMM16_X1_HW2: 1933 case R_TILEGX_IMM16_X0_HW3: 1934 case R_TILEGX_IMM16_X1_HW3: 1935 case R_TILEGX_IMM16_X0_HW0_LAST: 1936 case R_TILEGX_IMM16_X1_HW0_LAST: 1937 case R_TILEGX_IMM16_X0_HW1_LAST: 1938 case R_TILEGX_IMM16_X1_HW1_LAST: 1939 case R_TILEGX_IMM16_X0_HW2_LAST: 1940 case R_TILEGX_IMM16_X1_HW2_LAST: 1941 if (h != NULL) 1942 h->non_got_ref = 1; 1943 1944 r_tilegx_plt32: 1945 if (h != NULL && !info->shared) 1946 { 1947 /* We may need a .plt entry if the function this reloc 1948 refers to is in a shared lib. */ 1949 h->plt.refcount += 1; 1950 } 1951 1952 /* If we are creating a shared library, and this is a reloc 1953 against a global symbol, or a non PC relative reloc 1954 against a local symbol, then we need to copy the reloc 1955 into the shared library. However, if we are linking with 1956 -Bsymbolic, we do not need to copy a reloc against a 1957 global symbol which is defined in an object we are 1958 including in the link (i.e., DEF_REGULAR is set). At 1959 this point we have not seen all the input files, so it is 1960 possible that DEF_REGULAR is not set now but will be set 1961 later (it is never cleared). In case of a weak definition, 1962 DEF_REGULAR may be cleared later by a strong definition in 1963 a shared library. We account for that possibility below by 1964 storing information in the relocs_copied field of the hash 1965 table entry. A similar situation occurs when creating 1966 shared libraries and symbol visibility changes render the 1967 symbol local. 1968 1969 If on the other hand, we are creating an executable, we 1970 may need to keep relocations for symbols satisfied by a 1971 dynamic library if we manage to avoid copy relocs for the 1972 symbol. */ 1973 if ((info->shared 1974 && (sec->flags & SEC_ALLOC) != 0 1975 && (! tilegx_elf_howto_table[r_type].pc_relative 1976 || (h != NULL 1977 && (! info->symbolic 1978 || h->root.type == bfd_link_hash_defweak 1979 || !h->def_regular)))) 1980 || (!info->shared 1981 && (sec->flags & SEC_ALLOC) != 0 1982 && h != NULL 1983 && (h->root.type == bfd_link_hash_defweak 1984 || !h->def_regular))) 1985 { 1986 struct tilegx_elf_dyn_relocs *p; 1987 struct tilegx_elf_dyn_relocs **head; 1988 1989 /* When creating a shared object, we must copy these 1990 relocs into the output file. We create a reloc 1991 section in dynobj and make room for the reloc. */ 1992 if (sreloc == NULL) 1993 { 1994 sreloc = _bfd_elf_make_dynamic_reloc_section 1995 (sec, htab->elf.dynobj, htab->word_align_power, abfd, 1996 /*rela?*/ TRUE); 1997 1998 if (sreloc == NULL) 1999 return FALSE; 2000 } 2001 2002 /* If this is a global symbol, we count the number of 2003 relocations we need for this symbol. */ 2004 if (h != NULL) 2005 head = 2006 &((struct tilegx_elf_link_hash_entry *) h)->dyn_relocs; 2007 else 2008 { 2009 /* Track dynamic relocs needed for local syms too. 2010 We really need local syms available to do this 2011 easily. Oh well. */ 2012 2013 asection *s; 2014 void *vpp; 2015 Elf_Internal_Sym *isym; 2016 2017 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 2018 abfd, r_symndx); 2019 if (isym == NULL) 2020 return FALSE; 2021 2022 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 2023 if (s == NULL) 2024 s = sec; 2025 2026 vpp = &elf_section_data (s)->local_dynrel; 2027 head = (struct tilegx_elf_dyn_relocs **) vpp; 2028 } 2029 2030 p = *head; 2031 if (p == NULL || p->sec != sec) 2032 { 2033 bfd_size_type amt = sizeof *p; 2034 p = ((struct tilegx_elf_dyn_relocs *) 2035 bfd_alloc (htab->elf.dynobj, amt)); 2036 if (p == NULL) 2037 return FALSE; 2038 p->next = *head; 2039 *head = p; 2040 p->sec = sec; 2041 p->count = 0; 2042 p->pc_count = 0; 2043 } 2044 2045 p->count += 1; 2046 if (tilegx_elf_howto_table[r_type].pc_relative) 2047 p->pc_count += 1; 2048 } 2049 2050 break; 2051 2052 case R_TILEGX_GNU_VTINHERIT: 2053 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 2054 return FALSE; 2055 break; 2056 2057 case R_TILEGX_GNU_VTENTRY: 2058 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 2059 return FALSE; 2060 break; 2061 2062 default: 2063 break; 2064 } 2065 } 2066 2067 return TRUE; 2068 } 2069 2070 2071 asection * 2072 tilegx_elf_gc_mark_hook (asection *sec, 2073 struct bfd_link_info *info, 2074 Elf_Internal_Rela *rel, 2075 struct elf_link_hash_entry *h, 2076 Elf_Internal_Sym *sym) 2077 { 2078 if (h != NULL) 2079 { 2080 switch (TILEGX_ELF_R_TYPE (rel->r_info)) 2081 { 2082 case R_TILEGX_GNU_VTINHERIT: 2083 case R_TILEGX_GNU_VTENTRY: 2084 return NULL; 2085 } 2086 } 2087 2088 /* FIXME: The test here, in check_relocs and in relocate_section 2089 dealing with TLS optimization, ought to be !info->executable. */ 2090 if (info->shared) 2091 { 2092 switch (TILEGX_ELF_R_TYPE (rel->r_info)) 2093 { 2094 case R_TILEGX_TLS_GD_CALL: 2095 /* This reloc implicitly references __tls_get_addr. We know 2096 another reloc will reference the same symbol as the one 2097 on this reloc, so the real symbol and section will be 2098 gc marked when processing the other reloc. That lets 2099 us handle __tls_get_addr here. */ 2100 h = elf_link_hash_lookup (elf_hash_table (info), "__tls_get_addr", 2101 FALSE, FALSE, TRUE); 2102 BFD_ASSERT (h != NULL); 2103 h->mark = 1; 2104 if (h->u.weakdef != NULL) 2105 h->u.weakdef->mark = 1; 2106 sym = NULL; 2107 } 2108 } 2109 2110 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 2111 } 2112 2113 /* Update the got entry reference counts for the section being removed. */ 2114 bfd_boolean 2115 tilegx_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, 2116 asection *sec, const Elf_Internal_Rela *relocs) 2117 { 2118 struct tilegx_elf_link_hash_table *htab; 2119 Elf_Internal_Shdr *symtab_hdr; 2120 struct elf_link_hash_entry **sym_hashes; 2121 bfd_signed_vma *local_got_refcounts; 2122 const Elf_Internal_Rela *rel, *relend; 2123 2124 if (info->relocatable) 2125 return TRUE; 2126 2127 BFD_ASSERT (is_tilegx_elf (abfd) || sec->reloc_count == 0); 2128 2129 elf_section_data (sec)->local_dynrel = NULL; 2130 2131 htab = tilegx_elf_hash_table (info); 2132 BFD_ASSERT (htab != NULL); 2133 symtab_hdr = &elf_symtab_hdr (abfd); 2134 sym_hashes = elf_sym_hashes (abfd); 2135 local_got_refcounts = elf_local_got_refcounts (abfd); 2136 2137 relend = relocs + sec->reloc_count; 2138 for (rel = relocs; rel < relend; rel++) 2139 { 2140 unsigned long r_symndx; 2141 unsigned int r_type; 2142 struct elf_link_hash_entry *h = NULL; 2143 2144 r_symndx = TILEGX_ELF_R_SYMNDX (htab, rel->r_info); 2145 if (r_symndx >= symtab_hdr->sh_info) 2146 { 2147 struct tilegx_elf_link_hash_entry *eh; 2148 struct tilegx_elf_dyn_relocs **pp; 2149 struct tilegx_elf_dyn_relocs *p; 2150 2151 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 2152 while (h->root.type == bfd_link_hash_indirect 2153 || h->root.type == bfd_link_hash_warning) 2154 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2155 eh = (struct tilegx_elf_link_hash_entry *) h; 2156 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 2157 if (p->sec == sec) 2158 { 2159 /* Everything must go for SEC. */ 2160 *pp = p->next; 2161 break; 2162 } 2163 } 2164 2165 r_type = TILEGX_ELF_R_TYPE (rel->r_info); 2166 r_type = tilegx_elf_tls_transition (info, r_type, h != NULL, 2167 sec->sec_flg0); 2168 switch (r_type) 2169 { 2170 case R_TILEGX_IMM16_X0_HW0_GOT: 2171 case R_TILEGX_IMM16_X1_HW0_GOT: 2172 case R_TILEGX_IMM16_X0_HW0_LAST_GOT: 2173 case R_TILEGX_IMM16_X1_HW0_LAST_GOT: 2174 case R_TILEGX_IMM16_X0_HW1_LAST_GOT: 2175 case R_TILEGX_IMM16_X1_HW1_LAST_GOT: 2176 case R_TILEGX_IMM16_X0_HW0_TLS_GD: 2177 case R_TILEGX_IMM16_X1_HW0_TLS_GD: 2178 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD: 2179 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD: 2180 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD: 2181 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD: 2182 case R_TILEGX_IMM16_X0_HW0_TLS_IE: 2183 case R_TILEGX_IMM16_X1_HW0_TLS_IE: 2184 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE: 2185 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE: 2186 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE: 2187 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE: 2188 if (h != NULL) 2189 { 2190 if (h->got.refcount > 0) 2191 h->got.refcount--; 2192 } 2193 else 2194 { 2195 if (local_got_refcounts && 2196 local_got_refcounts[r_symndx] > 0) 2197 local_got_refcounts[r_symndx]--; 2198 } 2199 break; 2200 2201 case R_TILEGX_64_PCREL: 2202 case R_TILEGX_32_PCREL: 2203 case R_TILEGX_16_PCREL: 2204 case R_TILEGX_8_PCREL: 2205 case R_TILEGX_IMM16_X0_HW0_PCREL: 2206 case R_TILEGX_IMM16_X1_HW0_PCREL: 2207 case R_TILEGX_IMM16_X0_HW1_PCREL: 2208 case R_TILEGX_IMM16_X1_HW1_PCREL: 2209 case R_TILEGX_IMM16_X0_HW2_PCREL: 2210 case R_TILEGX_IMM16_X1_HW2_PCREL: 2211 case R_TILEGX_IMM16_X0_HW3_PCREL: 2212 case R_TILEGX_IMM16_X1_HW3_PCREL: 2213 case R_TILEGX_IMM16_X0_HW0_LAST_PCREL: 2214 case R_TILEGX_IMM16_X1_HW0_LAST_PCREL: 2215 case R_TILEGX_IMM16_X0_HW1_LAST_PCREL: 2216 case R_TILEGX_IMM16_X1_HW1_LAST_PCREL: 2217 case R_TILEGX_IMM16_X0_HW2_LAST_PCREL: 2218 case R_TILEGX_IMM16_X1_HW2_LAST_PCREL: 2219 if (h != NULL 2220 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 2221 break; 2222 /* Fall through. */ 2223 2224 case R_TILEGX_64: 2225 case R_TILEGX_32: 2226 case R_TILEGX_16: 2227 case R_TILEGX_8: 2228 case R_TILEGX_HW0: 2229 case R_TILEGX_HW1: 2230 case R_TILEGX_HW2: 2231 case R_TILEGX_HW3: 2232 case R_TILEGX_HW0_LAST: 2233 case R_TILEGX_HW1_LAST: 2234 case R_TILEGX_HW2_LAST: 2235 case R_TILEGX_COPY: 2236 case R_TILEGX_GLOB_DAT: 2237 case R_TILEGX_JMP_SLOT: 2238 case R_TILEGX_RELATIVE: 2239 case R_TILEGX_BROFF_X1: 2240 case R_TILEGX_JUMPOFF_X1: 2241 case R_TILEGX_IMM8_X0: 2242 case R_TILEGX_IMM8_Y0: 2243 case R_TILEGX_IMM8_X1: 2244 case R_TILEGX_IMM8_Y1: 2245 case R_TILEGX_DEST_IMM8_X1: 2246 case R_TILEGX_MT_IMM14_X1: 2247 case R_TILEGX_MF_IMM14_X1: 2248 case R_TILEGX_MMSTART_X0: 2249 case R_TILEGX_MMEND_X0: 2250 case R_TILEGX_SHAMT_X0: 2251 case R_TILEGX_SHAMT_X1: 2252 case R_TILEGX_SHAMT_Y0: 2253 case R_TILEGX_SHAMT_Y1: 2254 case R_TILEGX_IMM16_X0_HW0: 2255 case R_TILEGX_IMM16_X1_HW0: 2256 case R_TILEGX_IMM16_X0_HW1: 2257 case R_TILEGX_IMM16_X1_HW1: 2258 case R_TILEGX_IMM16_X0_HW2: 2259 case R_TILEGX_IMM16_X1_HW2: 2260 case R_TILEGX_IMM16_X0_HW3: 2261 case R_TILEGX_IMM16_X1_HW3: 2262 case R_TILEGX_IMM16_X0_HW0_LAST: 2263 case R_TILEGX_IMM16_X1_HW0_LAST: 2264 case R_TILEGX_IMM16_X0_HW1_LAST: 2265 case R_TILEGX_IMM16_X1_HW1_LAST: 2266 case R_TILEGX_IMM16_X0_HW2_LAST: 2267 case R_TILEGX_IMM16_X1_HW2_LAST: 2268 if (info->shared) 2269 break; 2270 /* Fall through. */ 2271 2272 case R_TILEGX_JUMPOFF_X1_PLT: 2273 if (h != NULL) 2274 { 2275 if (h->plt.refcount > 0) 2276 h->plt.refcount--; 2277 } 2278 break; 2279 2280 default: 2281 break; 2282 } 2283 } 2284 2285 return TRUE; 2286 } 2287 2288 /* Adjust a symbol defined by a dynamic object and referenced by a 2289 regular object. The current definition is in some section of the 2290 dynamic object, but we're not including those sections. We have to 2291 change the definition to something the rest of the link can 2292 understand. */ 2293 2294 bfd_boolean 2295 tilegx_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 2296 struct elf_link_hash_entry *h) 2297 { 2298 struct tilegx_elf_link_hash_table *htab; 2299 struct tilegx_elf_link_hash_entry * eh; 2300 struct tilegx_elf_dyn_relocs *p; 2301 bfd *dynobj; 2302 asection *s; 2303 2304 htab = tilegx_elf_hash_table (info); 2305 BFD_ASSERT (htab != NULL); 2306 2307 dynobj = htab->elf.dynobj; 2308 2309 /* Make sure we know what is going on here. */ 2310 BFD_ASSERT (dynobj != NULL 2311 && (h->needs_plt 2312 || h->u.weakdef != NULL 2313 || (h->def_dynamic 2314 && h->ref_regular 2315 && !h->def_regular))); 2316 2317 /* If this is a function, put it in the procedure linkage table. We 2318 will fill in the contents of the procedure linkage table later 2319 (although we could actually do it here). */ 2320 if (h->type == STT_FUNC || h->needs_plt) 2321 { 2322 if (h->plt.refcount <= 0 2323 || SYMBOL_CALLS_LOCAL (info, h) 2324 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 2325 && h->root.type == bfd_link_hash_undefweak)) 2326 { 2327 /* This case can occur if we saw a R_TILEGX_JUMPOFF_X1_PLT 2328 reloc in an input file, but the symbol was never referred 2329 to by a dynamic object, or if all references were garbage 2330 collected. In such a case, we don't actually need to build 2331 a procedure linkage table, and we can just do a 2332 R_TILEGX_JUMPOFF_X1 relocation instead. */ 2333 h->plt.offset = (bfd_vma) -1; 2334 h->needs_plt = 0; 2335 } 2336 2337 return TRUE; 2338 } 2339 else 2340 h->plt.offset = (bfd_vma) -1; 2341 2342 /* If this is a weak symbol, and there is a real definition, the 2343 processor independent code will have arranged for us to see the 2344 real definition first, and we can just use the same value. */ 2345 if (h->u.weakdef != NULL) 2346 { 2347 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 2348 || h->u.weakdef->root.type == bfd_link_hash_defweak); 2349 h->root.u.def.section = h->u.weakdef->root.u.def.section; 2350 h->root.u.def.value = h->u.weakdef->root.u.def.value; 2351 return TRUE; 2352 } 2353 2354 /* This is a reference to a symbol defined by a dynamic object which 2355 is not a function. */ 2356 2357 /* If we are creating a shared library, we must presume that the 2358 only references to the symbol are via the global offset table. 2359 For such cases we need not do anything here; the relocations will 2360 be handled correctly by relocate_section. */ 2361 if (info->shared) 2362 return TRUE; 2363 2364 /* If there are no references to this symbol that do not use the 2365 GOT, we don't need to generate a copy reloc. */ 2366 if (!h->non_got_ref) 2367 return TRUE; 2368 2369 /* If -z nocopyreloc was given, we won't generate them either. */ 2370 if (info->nocopyreloc) 2371 { 2372 h->non_got_ref = 0; 2373 return TRUE; 2374 } 2375 2376 eh = (struct tilegx_elf_link_hash_entry *) h; 2377 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2378 { 2379 s = p->sec->output_section; 2380 if (s != NULL && (s->flags & SEC_READONLY) != 0) 2381 break; 2382 } 2383 2384 /* If we didn't find any dynamic relocs in read-only sections, then 2385 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 2386 if (p == NULL) 2387 { 2388 h->non_got_ref = 0; 2389 return TRUE; 2390 } 2391 2392 /* We must allocate the symbol in our .dynbss section, which will 2393 become part of the .bss section of the executable. There will be 2394 an entry for this symbol in the .dynsym section. The dynamic 2395 object will contain position independent code, so all references 2396 from the dynamic object to this symbol will go through the global 2397 offset table. The dynamic linker will use the .dynsym entry to 2398 determine the address it must put in the global offset table, so 2399 both the dynamic object and the regular object will refer to the 2400 same memory location for the variable. */ 2401 2402 /* We must generate a R_TILEGX_COPY reloc to tell the dynamic linker 2403 to copy the initial value out of the dynamic object and into the 2404 runtime process image. We need to remember the offset into the 2405 .rel.bss section we are going to use. */ 2406 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 2407 { 2408 htab->srelbss->size += TILEGX_ELF_RELA_BYTES (htab); 2409 h->needs_copy = 1; 2410 } 2411 2412 return _bfd_elf_adjust_dynamic_copy (h, htab->sdynbss); 2413 } 2414 2415 /* Allocate space in .plt, .got and associated reloc sections for 2416 dynamic relocs. */ 2417 2418 static bfd_boolean 2419 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) 2420 { 2421 struct bfd_link_info *info; 2422 struct tilegx_elf_link_hash_table *htab; 2423 struct tilegx_elf_link_hash_entry *eh; 2424 struct tilegx_elf_dyn_relocs *p; 2425 2426 if (h->root.type == bfd_link_hash_indirect) 2427 return TRUE; 2428 2429 info = (struct bfd_link_info *) inf; 2430 htab = tilegx_elf_hash_table (info); 2431 BFD_ASSERT (htab != NULL); 2432 2433 if (htab->elf.dynamic_sections_created 2434 && h->plt.refcount > 0) 2435 { 2436 /* Make sure this symbol is output as a dynamic symbol. 2437 Undefined weak syms won't yet be marked as dynamic. */ 2438 if (h->dynindx == -1 2439 && !h->forced_local) 2440 { 2441 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2442 return FALSE; 2443 } 2444 2445 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h)) 2446 { 2447 asection *s = htab->elf.splt; 2448 2449 /* Allocate room for the header and tail. */ 2450 if (s->size == 0) 2451 { 2452 s->size = PLT_HEADER_SIZE + PLT_TAIL_SIZE; 2453 } 2454 2455 h->plt.offset = s->size - PLT_TAIL_SIZE; 2456 2457 /* If this symbol is not defined in a regular file, and we are 2458 not generating a shared library, then set the symbol to this 2459 location in the .plt. This is required to make function 2460 pointers compare as equal between the normal executable and 2461 the shared library. */ 2462 if (! info->shared 2463 && !h->def_regular) 2464 { 2465 h->root.u.def.section = s; 2466 h->root.u.def.value = h->plt.offset; 2467 } 2468 2469 /* Make room for this entry. */ 2470 s->size += PLT_ENTRY_SIZE; 2471 2472 /* We also need to make an entry in the .got.plt section. */ 2473 htab->elf.sgotplt->size += GOT_ENTRY_SIZE (htab); 2474 2475 /* We also need to make an entry in the .rela.plt section. */ 2476 htab->elf.srelplt->size += TILEGX_ELF_RELA_BYTES (htab); 2477 } 2478 else 2479 { 2480 h->plt.offset = (bfd_vma) -1; 2481 h->needs_plt = 0; 2482 } 2483 } 2484 else 2485 { 2486 h->plt.offset = (bfd_vma) -1; 2487 h->needs_plt = 0; 2488 } 2489 2490 /* If a TLS_IE symbol is now local to the binary, make it a TLS_LE 2491 requiring no TLS entry. */ 2492 if (h->got.refcount > 0 2493 && !htab->disable_le_transition 2494 && !info->shared 2495 && h->dynindx == -1 2496 && tilegx_elf_hash_entry(h)->tls_type == GOT_TLS_IE) 2497 h->got.offset = (bfd_vma) -1; 2498 else if (h->got.refcount > 0) 2499 { 2500 asection *s; 2501 bfd_boolean dyn; 2502 int tls_type = tilegx_elf_hash_entry(h)->tls_type; 2503 2504 /* Make sure this symbol is output as a dynamic symbol. 2505 Undefined weak syms won't yet be marked as dynamic. */ 2506 if (h->dynindx == -1 2507 && !h->forced_local) 2508 { 2509 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2510 return FALSE; 2511 } 2512 2513 s = htab->elf.sgot; 2514 h->got.offset = s->size; 2515 s->size += TILEGX_ELF_WORD_BYTES (htab); 2516 /* TLS_GD entries need 2 consecutive GOT slots. */ 2517 if (tls_type == GOT_TLS_GD) 2518 s->size += TILEGX_ELF_WORD_BYTES (htab); 2519 dyn = htab->elf.dynamic_sections_created; 2520 /* TLS_IE needs one dynamic relocation, 2521 TLS_GD needs two if local symbol and two if global. */ 2522 if (tls_type == GOT_TLS_GD || tls_type == GOT_TLS_IE) 2523 htab->elf.srelgot->size += 2 * TILEGX_ELF_RELA_BYTES (htab); 2524 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)) 2525 htab->elf.srelgot->size += TILEGX_ELF_RELA_BYTES (htab); 2526 } 2527 else 2528 h->got.offset = (bfd_vma) -1; 2529 2530 eh = (struct tilegx_elf_link_hash_entry *) h; 2531 if (eh->dyn_relocs == NULL) 2532 return TRUE; 2533 2534 /* In the shared -Bsymbolic case, discard space allocated for 2535 dynamic pc-relative relocs against symbols which turn out to be 2536 defined in regular objects. For the normal shared case, discard 2537 space for pc-relative relocs that have become local due to symbol 2538 visibility changes. */ 2539 2540 if (info->shared) 2541 { 2542 if (SYMBOL_CALLS_LOCAL (info, h)) 2543 { 2544 struct tilegx_elf_dyn_relocs **pp; 2545 2546 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 2547 { 2548 p->count -= p->pc_count; 2549 p->pc_count = 0; 2550 if (p->count == 0) 2551 *pp = p->next; 2552 else 2553 pp = &p->next; 2554 } 2555 } 2556 2557 /* Also discard relocs on undefined weak syms with non-default 2558 visibility. */ 2559 if (eh->dyn_relocs != NULL 2560 && h->root.type == bfd_link_hash_undefweak) 2561 { 2562 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 2563 eh->dyn_relocs = NULL; 2564 2565 /* Make sure undefined weak symbols are output as a dynamic 2566 symbol in PIEs. */ 2567 else if (h->dynindx == -1 2568 && !h->forced_local) 2569 { 2570 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2571 return FALSE; 2572 } 2573 } 2574 } 2575 else 2576 { 2577 /* For the non-shared case, discard space for relocs against 2578 symbols which turn out to need copy relocs or are not 2579 dynamic. */ 2580 2581 if (!h->non_got_ref 2582 && ((h->def_dynamic 2583 && !h->def_regular) 2584 || (htab->elf.dynamic_sections_created 2585 && (h->root.type == bfd_link_hash_undefweak 2586 || h->root.type == bfd_link_hash_undefined)))) 2587 { 2588 /* Make sure this symbol is output as a dynamic symbol. 2589 Undefined weak syms won't yet be marked as dynamic. */ 2590 if (h->dynindx == -1 2591 && !h->forced_local) 2592 { 2593 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2594 return FALSE; 2595 } 2596 2597 /* If that succeeded, we know we'll be keeping all the 2598 relocs. */ 2599 if (h->dynindx != -1) 2600 goto keep; 2601 } 2602 2603 eh->dyn_relocs = NULL; 2604 2605 keep: ; 2606 } 2607 2608 /* Finally, allocate space. */ 2609 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2610 { 2611 asection *sreloc = elf_section_data (p->sec)->sreloc; 2612 sreloc->size += p->count * TILEGX_ELF_RELA_BYTES (htab); 2613 } 2614 2615 return TRUE; 2616 } 2617 2618 /* Find any dynamic relocs that apply to read-only sections. */ 2619 2620 static bfd_boolean 2621 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) 2622 { 2623 struct tilegx_elf_link_hash_entry *eh; 2624 struct tilegx_elf_dyn_relocs *p; 2625 2626 eh = (struct tilegx_elf_link_hash_entry *) h; 2627 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2628 { 2629 asection *s = p->sec->output_section; 2630 2631 if (s != NULL && (s->flags & SEC_READONLY) != 0) 2632 { 2633 struct bfd_link_info *info = (struct bfd_link_info *) inf; 2634 2635 info->flags |= DF_TEXTREL; 2636 2637 /* Not an error, just cut short the traversal. */ 2638 return FALSE; 2639 } 2640 } 2641 return TRUE; 2642 } 2643 2644 /* Return true if the dynamic symbol for a given section should be 2645 omitted when creating a shared library. */ 2646 2647 bfd_boolean 2648 tilegx_elf_omit_section_dynsym (bfd *output_bfd, 2649 struct bfd_link_info *info, 2650 asection *p) 2651 { 2652 /* We keep the .got section symbol so that explicit relocations 2653 against the _GLOBAL_OFFSET_TABLE_ symbol emitted in PIC mode 2654 can be turned into relocations against the .got symbol. */ 2655 if (strcmp (p->name, ".got") == 0) 2656 return FALSE; 2657 2658 return _bfd_elf_link_omit_section_dynsym (output_bfd, info, p); 2659 } 2660 2661 bfd_boolean 2662 tilegx_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 2663 struct bfd_link_info *info) 2664 { 2665 struct tilegx_elf_link_hash_table *htab; 2666 bfd *dynobj; 2667 asection *s; 2668 bfd *ibfd; 2669 2670 htab = tilegx_elf_hash_table (info); 2671 BFD_ASSERT (htab != NULL); 2672 dynobj = htab->elf.dynobj; 2673 BFD_ASSERT (dynobj != NULL); 2674 2675 if (elf_hash_table (info)->dynamic_sections_created) 2676 { 2677 /* Set the contents of the .interp section to the interpreter. */ 2678 if (info->executable) 2679 { 2680 s = bfd_get_linker_section (dynobj, ".interp"); 2681 BFD_ASSERT (s != NULL); 2682 s->size = strlen (htab->dynamic_interpreter) + 1; 2683 s->contents = (unsigned char *) htab->dynamic_interpreter; 2684 } 2685 } 2686 2687 /* Set up .got offsets for local syms, and space for local dynamic 2688 relocs. */ 2689 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 2690 { 2691 bfd_signed_vma *local_got; 2692 bfd_signed_vma *end_local_got; 2693 char *local_tls_type; 2694 bfd_size_type locsymcount; 2695 Elf_Internal_Shdr *symtab_hdr; 2696 asection *srel; 2697 2698 if (! is_tilegx_elf (ibfd)) 2699 continue; 2700 2701 for (s = ibfd->sections; s != NULL; s = s->next) 2702 { 2703 struct tilegx_elf_dyn_relocs *p; 2704 2705 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) 2706 { 2707 if (!bfd_is_abs_section (p->sec) 2708 && bfd_is_abs_section (p->sec->output_section)) 2709 { 2710 /* Input section has been discarded, either because 2711 it is a copy of a linkonce section or due to 2712 linker script /DISCARD/, so we'll be discarding 2713 the relocs too. */ 2714 } 2715 else if (p->count != 0) 2716 { 2717 srel = elf_section_data (p->sec)->sreloc; 2718 srel->size += p->count * TILEGX_ELF_RELA_BYTES (htab); 2719 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2720 info->flags |= DF_TEXTREL; 2721 } 2722 } 2723 } 2724 2725 local_got = elf_local_got_refcounts (ibfd); 2726 if (!local_got) 2727 continue; 2728 2729 symtab_hdr = &elf_symtab_hdr (ibfd); 2730 locsymcount = symtab_hdr->sh_info; 2731 end_local_got = local_got + locsymcount; 2732 local_tls_type = _bfd_tilegx_elf_local_got_tls_type (ibfd); 2733 s = htab->elf.sgot; 2734 srel = htab->elf.srelgot; 2735 for (; local_got < end_local_got; ++local_got, ++local_tls_type) 2736 { 2737 if (*local_got > 0) 2738 { 2739 *local_got = s->size; 2740 s->size += TILEGX_ELF_WORD_BYTES (htab); 2741 if (*local_tls_type == GOT_TLS_GD) 2742 s->size += TILEGX_ELF_WORD_BYTES (htab); 2743 if (info->shared 2744 || *local_tls_type == GOT_TLS_GD 2745 || *local_tls_type == GOT_TLS_IE) 2746 srel->size += TILEGX_ELF_RELA_BYTES (htab); 2747 } 2748 else 2749 *local_got = (bfd_vma) -1; 2750 } 2751 } 2752 2753 /* Allocate global sym .plt and .got entries, and space for global 2754 sym dynamic relocs. */ 2755 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); 2756 2757 if (elf_hash_table (info)->dynamic_sections_created) 2758 { 2759 /* If the .got section is more than 0x8000 bytes, we add 2760 0x8000 to the value of _GLOBAL_OFFSET_TABLE_, so that 16 2761 bit relocations have a greater chance of working. */ 2762 if (htab->elf.sgot->size >= 0x8000 2763 && elf_hash_table (info)->hgot->root.u.def.value == 0) 2764 elf_hash_table (info)->hgot->root.u.def.value = 0x8000; 2765 } 2766 2767 if (htab->elf.sgotplt) 2768 { 2769 struct elf_link_hash_entry *got; 2770 got = elf_link_hash_lookup (elf_hash_table (info), 2771 "_GLOBAL_OFFSET_TABLE_", 2772 FALSE, FALSE, FALSE); 2773 2774 /* Don't allocate .got.plt section if there are no GOT nor PLT 2775 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ 2776 if ((got == NULL 2777 || !got->ref_regular_nonweak) 2778 && (htab->elf.sgotplt->size 2779 == (unsigned)GOTPLT_HEADER_SIZE (htab)) 2780 && (htab->elf.splt == NULL 2781 || htab->elf.splt->size == 0) 2782 && (htab->elf.sgot == NULL 2783 || (htab->elf.sgot->size 2784 == get_elf_backend_data (output_bfd)->got_header_size))) 2785 htab->elf.sgotplt->size = 0; 2786 } 2787 2788 /* The check_relocs and adjust_dynamic_symbol entry points have 2789 determined the sizes of the various dynamic sections. Allocate 2790 memory for them. */ 2791 for (s = dynobj->sections; s != NULL; s = s->next) 2792 { 2793 if ((s->flags & SEC_LINKER_CREATED) == 0) 2794 continue; 2795 2796 if (s == htab->elf.splt 2797 || s == htab->elf.sgot 2798 || s == htab->elf.sgotplt 2799 || s == htab->sdynbss) 2800 { 2801 /* Strip this section if we don't need it; see the 2802 comment below. */ 2803 } 2804 else if (strncmp (s->name, ".rela", 5) == 0) 2805 { 2806 if (s->size != 0) 2807 { 2808 /* We use the reloc_count field as a counter if we need 2809 to copy relocs into the output file. */ 2810 s->reloc_count = 0; 2811 } 2812 } 2813 else 2814 { 2815 /* It's not one of our sections. */ 2816 continue; 2817 } 2818 2819 if (s->size == 0) 2820 { 2821 /* If we don't need this section, strip it from the 2822 output file. This is mostly to handle .rela.bss and 2823 .rela.plt. We must create both sections in 2824 create_dynamic_sections, because they must be created 2825 before the linker maps input sections to output 2826 sections. The linker does that before 2827 adjust_dynamic_symbol is called, and it is that 2828 function which decides whether anything needs to go 2829 into these sections. */ 2830 s->flags |= SEC_EXCLUDE; 2831 continue; 2832 } 2833 2834 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2835 continue; 2836 2837 /* Allocate memory for the section contents. Zero the memory 2838 for the benefit of .rela.plt, which has 4 unused entries 2839 at the beginning, and we don't want garbage. */ 2840 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 2841 if (s->contents == NULL) 2842 return FALSE; 2843 } 2844 2845 if (elf_hash_table (info)->dynamic_sections_created) 2846 { 2847 /* Add some entries to the .dynamic section. We fill in the 2848 values later, in tilegx_elf_finish_dynamic_sections, but we 2849 must add the entries now so that we get the correct size for 2850 the .dynamic section. The DT_DEBUG entry is filled in by the 2851 dynamic linker and used by the debugger. */ 2852 #define add_dynamic_entry(TAG, VAL) \ 2853 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2854 2855 if (info->executable) 2856 { 2857 if (!add_dynamic_entry (DT_DEBUG, 0)) 2858 return FALSE; 2859 } 2860 2861 if (htab->elf.srelplt->size != 0) 2862 { 2863 if (!add_dynamic_entry (DT_PLTGOT, 0) 2864 || !add_dynamic_entry (DT_PLTRELSZ, 0) 2865 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 2866 || !add_dynamic_entry (DT_JMPREL, 0)) 2867 return FALSE; 2868 } 2869 2870 if (!add_dynamic_entry (DT_RELA, 0) 2871 || !add_dynamic_entry (DT_RELASZ, 0) 2872 || !add_dynamic_entry (DT_RELAENT, TILEGX_ELF_RELA_BYTES (htab))) 2873 return FALSE; 2874 2875 /* If any dynamic relocs apply to a read-only section, 2876 then we need a DT_TEXTREL entry. */ 2877 if ((info->flags & DF_TEXTREL) == 0) 2878 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info); 2879 2880 if (info->flags & DF_TEXTREL) 2881 { 2882 if (!add_dynamic_entry (DT_TEXTREL, 0)) 2883 return FALSE; 2884 } 2885 } 2886 #undef add_dynamic_entry 2887 2888 return TRUE; 2889 } 2890 2891 /* Return the base VMA address which should be subtracted from real addresses 2892 when resolving @dtpoff relocation. 2893 This is PT_TLS segment p_vaddr. */ 2894 2895 static bfd_vma 2896 dtpoff_base (struct bfd_link_info *info) 2897 { 2898 /* If tls_sec is NULL, we should have signalled an error already. */ 2899 if (elf_hash_table (info)->tls_sec == NULL) 2900 return 0; 2901 return elf_hash_table (info)->tls_sec->vma; 2902 } 2903 2904 /* Return the relocation value for @tpoff relocation. */ 2905 2906 static bfd_vma 2907 tpoff (struct bfd_link_info *info, bfd_vma address) 2908 { 2909 struct elf_link_hash_table *htab = elf_hash_table (info); 2910 2911 /* If tls_sec is NULL, we should have signalled an error already. */ 2912 if (htab->tls_sec == NULL) 2913 return 0; 2914 2915 return (address - htab->tls_sec->vma); 2916 } 2917 2918 /* Copy SIZE bits from FROM to TO at address ADDR. */ 2919 2920 static void 2921 tilegx_copy_bits (bfd_byte *addr, int from, int to, int size) 2922 { 2923 int i; 2924 for (i = 0; i < size; i++) 2925 { 2926 int from_byte = (from + i) / 8; 2927 int from_bit = (from + i) % 8; 2928 int to_byte = (to + i) / 8; 2929 int to_bit = (to + i) % 8; 2930 bfd_byte to_mask = 1 << to_bit; 2931 addr[to_byte] = (addr[to_byte] & ~to_mask) 2932 | ((addr[from_byte] >> from_bit << to_bit) & to_mask); 2933 } 2934 } 2935 2936 /* Replace the MASK bits in ADDR with those in INSN, for the next 2937 TILEGX_BUNDLE_SIZE_IN_BYTES bytes. */ 2938 2939 static void 2940 tilegx_replace_insn (bfd_byte *addr, const bfd_byte *mask, 2941 const bfd_byte *insn) 2942 { 2943 int i; 2944 for (i = 0; i < TILEGX_BUNDLE_SIZE_IN_BYTES; i++) 2945 { 2946 addr[i] = (addr[i] & ~mask[i]) | (insn[i] & mask[i]); 2947 } 2948 } 2949 2950 /* Mask to extract the bits corresponding to an instruction in a 2951 specific pipe of a bundle. */ 2952 static const bfd_byte insn_mask_X1[] = { 2953 0x00, 0x00, 0x00, 0x80, 0xff, 0xff, 0xff, 0x3f 2954 }; 2955 2956 /* Mask to extract the bits corresponding to an instruction in a 2957 specific pipe of a bundle, minus the destination operand and the 2958 first source operand. */ 2959 static const bfd_byte insn_mask_X0_no_dest_no_srca[] = { 2960 0x00, 0xf0, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x00 2961 }; 2962 2963 static const bfd_byte insn_mask_X1_no_dest_no_srca[] = { 2964 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0xff, 0x3f 2965 }; 2966 2967 static const bfd_byte insn_mask_Y0_no_dest_no_srca[] = { 2968 0x00, 0xf0, 0x0f, 0x78, 0x00, 0x00, 0x00, 0x00 2969 }; 2970 static const bfd_byte insn_mask_Y1_no_dest_no_srca[] = { 2971 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x07, 0x3c 2972 }; 2973 2974 /* Mask to extract the bits corresponding to an instruction in a 2975 specific pipe of a bundle, minus the register operands. */ 2976 static const bfd_byte insn_mask_X0_no_operand[] = { 2977 0x00, 0x00, 0xfc, 0x7f, 0x00, 0x00, 0x00, 0x00 2978 }; 2979 2980 static const bfd_byte insn_mask_X1_no_operand[] = { 2981 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x3f 2982 }; 2983 2984 static const bfd_byte insn_mask_Y0_no_operand[] = { 2985 0x00, 0x00, 0x0c, 0x78, 0x00, 0x00, 0x00, 0x00 2986 }; 2987 2988 static const bfd_byte insn_mask_Y1_no_operand[] = { 2989 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x3c 2990 }; 2991 2992 /* Various instructions synthesized to support tls references. */ 2993 2994 /* ld r0, r0 in the X1 pipe, used for tls ie. */ 2995 static const bfd_byte insn_tls_ie_ld_X1[] = { 2996 0x00, 0x00, 0x00, 0x00, 0x00, 0xe8, 0x6a, 0x28 2997 }; 2998 2999 /* ld4s r0, r0 in the X1 pipe, used for tls ie. */ 3000 static const bfd_byte insn_tls_ie_ld4s_X1[] = { 3001 0x00, 0x00, 0x00, 0x00, 0x00, 0x98, 0x6a, 0x28 3002 }; 3003 3004 /* add r0, r0, tp in various pipes, used for tls ie. */ 3005 static const bfd_byte insn_tls_ie_add_X0X1[] = { 3006 0x00, 0x50, 0x0f, 0x50, 0x00, 0xa8, 0x07, 0x28 3007 }; 3008 static const bfd_byte insn_tls_ie_add_Y0Y1[] = { 3009 0x00, 0x50, 0x27, 0x2c, 0x00, 0xa8, 0x13, 0x9a 3010 }; 3011 3012 /* addx r0, r0, tp in various pipes, used for tls ie. */ 3013 static const bfd_byte insn_tls_ie_addx_X0X1[] = { 3014 0x00, 0x50, 0x0b, 0x50, 0x00, 0xa8, 0x05, 0x28 3015 }; 3016 static const bfd_byte insn_tls_ie_addx_Y0Y1[] = { 3017 0x00, 0x50, 0x03, 0x2c, 0x00, 0xa8, 0x01, 0x9a 3018 }; 3019 3020 /* move r0, r0 in various pipes, used for tls gd. */ 3021 static const bfd_byte insn_tls_gd_add_X0X1[] = { 3022 0x00, 0xf0, 0x07, 0x51, 0x00, 0xf8, 0x3b, 0x28 3023 }; 3024 static const bfd_byte insn_tls_gd_add_Y0Y1[] = { 3025 0x00, 0xf0, 0x0b, 0x54, 0x00, 0xf8, 0x05, 0xae 3026 }; 3027 3028 static const bfd_byte *insn_move_X0X1 = insn_tls_gd_add_X0X1; 3029 static const bfd_byte *insn_move_Y0Y1 = insn_tls_gd_add_Y0Y1; 3030 3031 static const bfd_byte *insn_add_X0X1 = insn_tls_ie_add_X0X1; 3032 static const bfd_byte *insn_add_Y0Y1 = insn_tls_ie_add_Y0Y1; 3033 3034 static const bfd_byte *insn_addx_X0X1 = insn_tls_ie_addx_X0X1; 3035 static const bfd_byte *insn_addx_Y0Y1 = insn_tls_ie_addx_Y0Y1; 3036 3037 /* Relocate an TILEGX ELF section. 3038 3039 The RELOCATE_SECTION function is called by the new ELF backend linker 3040 to handle the relocations for a section. 3041 3042 The relocs are always passed as Rela structures. 3043 3044 This function is responsible for adjusting the section contents as 3045 necessary, and (if generating a relocatable output file) adjusting 3046 the reloc addend as necessary. 3047 3048 This function does not have to worry about setting the reloc 3049 address or the reloc symbol index. 3050 3051 LOCAL_SYMS is a pointer to the swapped in local symbols. 3052 3053 LOCAL_SECTIONS is an array giving the section in the input file 3054 corresponding to the st_shndx field of each local symbol. 3055 3056 The global hash table entry for the global symbols can be found 3057 via elf_sym_hashes (input_bfd). 3058 3059 When generating relocatable output, this function must handle 3060 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 3061 going to be the section symbol corresponding to the output 3062 section, which means that the addend must be adjusted 3063 accordingly. */ 3064 3065 bfd_boolean 3066 tilegx_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info, 3067 bfd *input_bfd, asection *input_section, 3068 bfd_byte *contents, Elf_Internal_Rela *relocs, 3069 Elf_Internal_Sym *local_syms, 3070 asection **local_sections) 3071 { 3072 struct tilegx_elf_link_hash_table *htab; 3073 Elf_Internal_Shdr *symtab_hdr; 3074 struct elf_link_hash_entry **sym_hashes; 3075 bfd_vma *local_got_offsets; 3076 bfd_vma got_base; 3077 asection *sreloc; 3078 Elf_Internal_Rela *rel; 3079 Elf_Internal_Rela *relend; 3080 int num_relocs; 3081 3082 htab = tilegx_elf_hash_table (info); 3083 BFD_ASSERT (htab != NULL); 3084 symtab_hdr = &elf_symtab_hdr (input_bfd); 3085 sym_hashes = elf_sym_hashes (input_bfd); 3086 local_got_offsets = elf_local_got_offsets (input_bfd); 3087 3088 if (elf_hash_table (info)->hgot == NULL) 3089 got_base = 0; 3090 else 3091 got_base = elf_hash_table (info)->hgot->root.u.def.value; 3092 3093 sreloc = elf_section_data (input_section)->sreloc; 3094 3095 rel = relocs; 3096 num_relocs = input_section->reloc_count; 3097 relend = relocs + num_relocs; 3098 for (; rel < relend; rel++) 3099 { 3100 int r_type, tls_type; 3101 bfd_boolean is_tls_iele, is_tls_le; 3102 reloc_howto_type *howto; 3103 unsigned long r_symndx; 3104 struct elf_link_hash_entry *h; 3105 Elf_Internal_Sym *sym; 3106 tilegx_create_func create_func; 3107 asection *sec; 3108 bfd_vma relocation; 3109 bfd_reloc_status_type r; 3110 const char *name; 3111 bfd_vma off; 3112 bfd_boolean is_plt = FALSE; 3113 3114 bfd_boolean unresolved_reloc; 3115 3116 r_type = TILEGX_ELF_R_TYPE (rel->r_info); 3117 if (r_type == R_TILEGX_GNU_VTINHERIT 3118 || r_type == R_TILEGX_GNU_VTENTRY) 3119 continue; 3120 3121 if ((unsigned int)r_type >= ARRAY_SIZE (tilegx_elf_howto_table)) 3122 { 3123 /* Not clear if we need to check here, but just be paranoid. */ 3124 (*_bfd_error_handler) 3125 (_("%B: unrecognized relocation (0x%x) in section `%A'"), 3126 input_bfd, r_type, input_section); 3127 bfd_set_error (bfd_error_bad_value); 3128 return FALSE; 3129 } 3130 3131 howto = tilegx_elf_howto_table + r_type; 3132 3133 /* This is a final link. */ 3134 r_symndx = TILEGX_ELF_R_SYMNDX (htab, rel->r_info); 3135 h = NULL; 3136 sym = NULL; 3137 sec = NULL; 3138 unresolved_reloc = FALSE; 3139 if (r_symndx < symtab_hdr->sh_info) 3140 { 3141 sym = local_syms + r_symndx; 3142 sec = local_sections[r_symndx]; 3143 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 3144 } 3145 else 3146 { 3147 bfd_boolean warned; 3148 3149 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 3150 r_symndx, symtab_hdr, sym_hashes, 3151 h, sec, relocation, 3152 unresolved_reloc, warned); 3153 if (warned) 3154 { 3155 /* To avoid generating warning messages about truncated 3156 relocations, set the relocation's address to be the same as 3157 the start of this section. */ 3158 if (input_section->output_section != NULL) 3159 relocation = input_section->output_section->vma; 3160 else 3161 relocation = 0; 3162 } 3163 } 3164 3165 if (sec != NULL && discarded_section (sec)) 3166 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 3167 rel, 1, relend, howto, 0, contents); 3168 3169 if (info->relocatable) 3170 continue; 3171 3172 if (h != NULL) 3173 name = h->root.root.string; 3174 else 3175 { 3176 name = (bfd_elf_string_from_elf_section 3177 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 3178 if (name == NULL || *name == '\0') 3179 name = bfd_section_name (input_bfd, sec); 3180 } 3181 3182 switch (r_type) 3183 { 3184 case R_TILEGX_TLS_GD_CALL: 3185 case R_TILEGX_IMM8_X0_TLS_GD_ADD: 3186 case R_TILEGX_IMM8_Y0_TLS_GD_ADD: 3187 case R_TILEGX_IMM8_X1_TLS_GD_ADD: 3188 case R_TILEGX_IMM8_Y1_TLS_GD_ADD: 3189 case R_TILEGX_IMM8_X0_TLS_ADD: 3190 case R_TILEGX_IMM8_Y0_TLS_ADD: 3191 case R_TILEGX_IMM8_X1_TLS_ADD: 3192 case R_TILEGX_IMM8_Y1_TLS_ADD: 3193 tls_type = GOT_UNKNOWN; 3194 if (h == NULL && local_got_offsets) 3195 tls_type = 3196 _bfd_tilegx_elf_local_got_tls_type (input_bfd) [r_symndx]; 3197 else if (h != NULL) 3198 tls_type = tilegx_elf_hash_entry(h)->tls_type; 3199 3200 is_tls_iele = (! info->shared || tls_type == GOT_TLS_IE); 3201 is_tls_le = is_tls_iele && (!input_section->sec_flg0 3202 && !info->shared 3203 && (h == NULL || h->dynindx == -1)); 3204 3205 if (r_type == R_TILEGX_TLS_GD_CALL) 3206 { 3207 if (is_tls_le) 3208 { 3209 /* GD -> LE */ 3210 tilegx_replace_insn (contents + rel->r_offset, 3211 insn_mask_X1, insn_move_X0X1); 3212 continue; 3213 } 3214 else if (is_tls_iele) 3215 { 3216 /* GD -> IE */ 3217 if (ABI_64_P (output_bfd)) 3218 tilegx_replace_insn (contents + rel->r_offset, 3219 insn_mask_X1, insn_tls_ie_ld_X1); 3220 else 3221 tilegx_replace_insn (contents + rel->r_offset, 3222 insn_mask_X1, insn_tls_ie_ld4s_X1); 3223 continue; 3224 } 3225 3226 /* GD -> GD */ 3227 h = (struct elf_link_hash_entry *) 3228 bfd_link_hash_lookup (info->hash, "__tls_get_addr", FALSE, 3229 FALSE, TRUE); 3230 BFD_ASSERT (h != NULL); 3231 r_type = R_TILEGX_JUMPOFF_X1_PLT; 3232 howto = tilegx_elf_howto_table + r_type; 3233 } 3234 else if (r_type == R_TILEGX_IMM8_X0_TLS_ADD 3235 || r_type == R_TILEGX_IMM8_X1_TLS_ADD 3236 || r_type == R_TILEGX_IMM8_Y0_TLS_ADD 3237 || r_type == R_TILEGX_IMM8_Y1_TLS_ADD) 3238 { 3239 bfd_boolean is_pipe0 = 3240 (r_type == R_TILEGX_IMM8_X0_TLS_ADD 3241 || r_type == R_TILEGX_IMM8_Y0_TLS_ADD); 3242 bfd_boolean is_X0X1 = 3243 (r_type == R_TILEGX_IMM8_X0_TLS_ADD 3244 || r_type == R_TILEGX_IMM8_X1_TLS_ADD); 3245 int dest_begin = is_pipe0 ? 0 : 31; 3246 int src_begin; 3247 const bfd_byte *insn; 3248 const bfd_byte *mask = NULL; 3249 3250 if (is_tls_le) 3251 { 3252 /* 1. copy dest operand into the first source operand. 3253 2. change the opcode to "move". */ 3254 src_begin = is_pipe0 ? 6 : 37; 3255 insn = is_X0X1 ? insn_move_X0X1 : insn_move_Y0Y1; 3256 3257 switch (r_type) 3258 { 3259 case R_TILEGX_IMM8_X0_TLS_ADD: 3260 mask = insn_mask_X0_no_dest_no_srca; 3261 break; 3262 case R_TILEGX_IMM8_X1_TLS_ADD: 3263 mask = insn_mask_X1_no_dest_no_srca; 3264 break; 3265 case R_TILEGX_IMM8_Y0_TLS_ADD: 3266 mask = insn_mask_Y0_no_dest_no_srca; 3267 break; 3268 case R_TILEGX_IMM8_Y1_TLS_ADD: 3269 mask = insn_mask_Y1_no_dest_no_srca; 3270 break; 3271 } 3272 } 3273 else 3274 { 3275 /* 1. copy dest operand into the second source operand. 3276 2. change the opcode to "add". */ 3277 src_begin = is_pipe0 ? 12 : 43; 3278 if (ABI_64_P (output_bfd)) 3279 insn = is_X0X1 ? insn_add_X0X1 : insn_add_Y0Y1; 3280 else 3281 insn = is_X0X1 ? insn_addx_X0X1 : insn_addx_Y0Y1; 3282 3283 switch (r_type) 3284 { 3285 case R_TILEGX_IMM8_X0_TLS_ADD: 3286 mask = insn_mask_X0_no_operand; 3287 break; 3288 case R_TILEGX_IMM8_X1_TLS_ADD: 3289 mask = insn_mask_X1_no_operand; 3290 break; 3291 case R_TILEGX_IMM8_Y0_TLS_ADD: 3292 mask = insn_mask_Y0_no_operand; 3293 break; 3294 case R_TILEGX_IMM8_Y1_TLS_ADD: 3295 mask = insn_mask_Y1_no_operand; 3296 break; 3297 } 3298 } 3299 3300 tilegx_copy_bits (contents + rel->r_offset, dest_begin, 3301 src_begin, 6); 3302 tilegx_replace_insn (contents + rel->r_offset, mask, insn); 3303 3304 continue; 3305 } 3306 else 3307 { 3308 const bfd_byte *mask = NULL; 3309 const bfd_byte *add_insn = NULL; 3310 bfd_boolean is_64bit = ABI_64_P (output_bfd); 3311 3312 switch (r_type) 3313 { 3314 case R_TILEGX_IMM8_X0_TLS_GD_ADD: 3315 add_insn = is_tls_iele 3316 ? (is_64bit ? insn_tls_ie_add_X0X1 : insn_tls_ie_addx_X0X1) 3317 : insn_tls_gd_add_X0X1; 3318 mask = insn_mask_X0_no_dest_no_srca; 3319 break; 3320 case R_TILEGX_IMM8_X1_TLS_GD_ADD: 3321 add_insn = is_tls_iele 3322 ? (is_64bit ? insn_tls_ie_add_X0X1 : insn_tls_ie_addx_X0X1) 3323 : insn_tls_gd_add_X0X1; 3324 mask = insn_mask_X1_no_dest_no_srca; 3325 break; 3326 case R_TILEGX_IMM8_Y0_TLS_GD_ADD: 3327 add_insn = is_tls_iele 3328 ? (is_64bit ? insn_tls_ie_add_Y0Y1 : insn_tls_ie_addx_Y0Y1) 3329 : insn_tls_gd_add_Y0Y1; 3330 mask = insn_mask_Y0_no_dest_no_srca; 3331 break; 3332 case R_TILEGX_IMM8_Y1_TLS_GD_ADD: 3333 add_insn = is_tls_iele 3334 ? (is_64bit ? insn_tls_ie_add_Y0Y1 : insn_tls_ie_addx_Y0Y1) 3335 : insn_tls_gd_add_Y0Y1; 3336 mask = insn_mask_Y1_no_dest_no_srca; 3337 break; 3338 } 3339 3340 tilegx_replace_insn (contents + rel->r_offset, mask, add_insn); 3341 3342 continue; 3343 } 3344 break; 3345 case R_TILEGX_TLS_IE_LOAD: 3346 if (!input_section->sec_flg0 3347 && !info->shared 3348 && (h == NULL || h->dynindx == -1)) 3349 { 3350 /* IE -> LE */ 3351 tilegx_replace_insn (contents + rel->r_offset, 3352 insn_mask_X1_no_dest_no_srca, 3353 insn_move_X0X1); 3354 } 3355 else 3356 { 3357 /* IE -> IE */ 3358 if (ABI_64_P (output_bfd)) 3359 tilegx_replace_insn (contents + rel->r_offset, 3360 insn_mask_X1_no_dest_no_srca, 3361 insn_tls_ie_ld_X1); 3362 else 3363 tilegx_replace_insn (contents + rel->r_offset, 3364 insn_mask_X1_no_dest_no_srca, 3365 insn_tls_ie_ld4s_X1); 3366 } 3367 continue; 3368 break; 3369 default: 3370 break; 3371 } 3372 3373 switch (r_type) 3374 { 3375 case R_TILEGX_IMM16_X0_HW0_GOT: 3376 case R_TILEGX_IMM16_X1_HW0_GOT: 3377 case R_TILEGX_IMM16_X0_HW0_LAST_GOT: 3378 case R_TILEGX_IMM16_X1_HW0_LAST_GOT: 3379 case R_TILEGX_IMM16_X0_HW1_LAST_GOT: 3380 case R_TILEGX_IMM16_X1_HW1_LAST_GOT: 3381 /* Relocation is to the entry for this symbol in the global 3382 offset table. */ 3383 if (htab->elf.sgot == NULL) 3384 abort (); 3385 3386 if (h != NULL) 3387 { 3388 bfd_boolean dyn; 3389 3390 off = h->got.offset; 3391 BFD_ASSERT (off != (bfd_vma) -1); 3392 dyn = elf_hash_table (info)->dynamic_sections_created; 3393 3394 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 3395 || (info->shared 3396 && SYMBOL_REFERENCES_LOCAL (info, h))) 3397 { 3398 /* This is actually a static link, or it is a 3399 -Bsymbolic link and the symbol is defined 3400 locally, or the symbol was forced to be local 3401 because of a version file. We must initialize 3402 this entry in the global offset table. Since the 3403 offset must always be a multiple 3404 of 8 for 64-bit, we use the least significant bit 3405 to record whether we have initialized it already. 3406 3407 When doing a dynamic link, we create a .rela.got 3408 relocation entry to initialize the value. This 3409 is done in the finish_dynamic_symbol routine. */ 3410 if ((off & 1) != 0) 3411 off &= ~1; 3412 else 3413 { 3414 TILEGX_ELF_PUT_WORD (htab, output_bfd, relocation, 3415 htab->elf.sgot->contents + off); 3416 h->got.offset |= 1; 3417 } 3418 } 3419 else 3420 unresolved_reloc = FALSE; 3421 } 3422 else 3423 { 3424 BFD_ASSERT (local_got_offsets != NULL 3425 && local_got_offsets[r_symndx] != (bfd_vma) -1); 3426 3427 off = local_got_offsets[r_symndx]; 3428 3429 /* The offset must always be a multiple of 8 on 64-bit. 3430 We use the least significant bit to record 3431 whether we have already processed this entry. */ 3432 if ((off & 1) != 0) 3433 off &= ~1; 3434 else 3435 { 3436 if (info->shared) 3437 { 3438 asection *s; 3439 Elf_Internal_Rela outrel; 3440 3441 /* We need to generate a R_TILEGX_RELATIVE reloc 3442 for the dynamic linker. */ 3443 s = htab->elf.srelgot; 3444 BFD_ASSERT (s != NULL); 3445 3446 outrel.r_offset = (htab->elf.sgot->output_section->vma 3447 + htab->elf.sgot->output_offset 3448 + off); 3449 outrel.r_info = 3450 TILEGX_ELF_R_INFO (htab, NULL, 0, R_TILEGX_RELATIVE); 3451 outrel.r_addend = relocation; 3452 relocation = 0; 3453 tilegx_elf_append_rela (output_bfd, s, &outrel); 3454 } 3455 3456 TILEGX_ELF_PUT_WORD (htab, output_bfd, relocation, 3457 htab->elf.sgot->contents + off); 3458 local_got_offsets[r_symndx] |= 1; 3459 } 3460 } 3461 relocation = off - got_base; 3462 break; 3463 3464 case R_TILEGX_JUMPOFF_X1_PLT: 3465 /* Relocation is to the entry for this symbol in the 3466 procedure linkage table. */ 3467 BFD_ASSERT (h != NULL); 3468 3469 if (h->plt.offset == (bfd_vma) -1 || htab->elf.splt == NULL) 3470 { 3471 /* We didn't make a PLT entry for this symbol. This 3472 happens when statically linking PIC code, or when 3473 using -Bsymbolic. */ 3474 break; 3475 } 3476 3477 relocation = (htab->elf.splt->output_section->vma 3478 + htab->elf.splt->output_offset 3479 + h->plt.offset); 3480 unresolved_reloc = FALSE; 3481 break; 3482 3483 case R_TILEGX_64_PCREL: 3484 case R_TILEGX_32_PCREL: 3485 case R_TILEGX_16_PCREL: 3486 case R_TILEGX_8_PCREL: 3487 case R_TILEGX_IMM16_X0_HW0_PCREL: 3488 case R_TILEGX_IMM16_X1_HW0_PCREL: 3489 case R_TILEGX_IMM16_X0_HW1_PCREL: 3490 case R_TILEGX_IMM16_X1_HW1_PCREL: 3491 case R_TILEGX_IMM16_X0_HW2_PCREL: 3492 case R_TILEGX_IMM16_X1_HW2_PCREL: 3493 case R_TILEGX_IMM16_X0_HW3_PCREL: 3494 case R_TILEGX_IMM16_X1_HW3_PCREL: 3495 case R_TILEGX_IMM16_X0_HW0_LAST_PCREL: 3496 case R_TILEGX_IMM16_X1_HW0_LAST_PCREL: 3497 case R_TILEGX_IMM16_X0_HW1_LAST_PCREL: 3498 case R_TILEGX_IMM16_X1_HW1_LAST_PCREL: 3499 case R_TILEGX_IMM16_X0_HW2_LAST_PCREL: 3500 case R_TILEGX_IMM16_X1_HW2_LAST_PCREL: 3501 if (h != NULL 3502 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 3503 break; 3504 /* Fall through. */ 3505 case R_TILEGX_64: 3506 case R_TILEGX_32: 3507 case R_TILEGX_16: 3508 case R_TILEGX_8: 3509 case R_TILEGX_HW0: 3510 case R_TILEGX_HW1: 3511 case R_TILEGX_HW2: 3512 case R_TILEGX_HW3: 3513 case R_TILEGX_HW0_LAST: 3514 case R_TILEGX_HW1_LAST: 3515 case R_TILEGX_HW2_LAST: 3516 case R_TILEGX_COPY: 3517 case R_TILEGX_GLOB_DAT: 3518 case R_TILEGX_JMP_SLOT: 3519 case R_TILEGX_RELATIVE: 3520 case R_TILEGX_BROFF_X1: 3521 case R_TILEGX_JUMPOFF_X1: 3522 case R_TILEGX_IMM8_X0: 3523 case R_TILEGX_IMM8_Y0: 3524 case R_TILEGX_IMM8_X1: 3525 case R_TILEGX_IMM8_Y1: 3526 case R_TILEGX_DEST_IMM8_X1: 3527 case R_TILEGX_MT_IMM14_X1: 3528 case R_TILEGX_MF_IMM14_X1: 3529 case R_TILEGX_MMSTART_X0: 3530 case R_TILEGX_MMEND_X0: 3531 case R_TILEGX_SHAMT_X0: 3532 case R_TILEGX_SHAMT_X1: 3533 case R_TILEGX_SHAMT_Y0: 3534 case R_TILEGX_SHAMT_Y1: 3535 case R_TILEGX_IMM16_X0_HW0: 3536 case R_TILEGX_IMM16_X1_HW0: 3537 case R_TILEGX_IMM16_X0_HW1: 3538 case R_TILEGX_IMM16_X1_HW1: 3539 case R_TILEGX_IMM16_X0_HW2: 3540 case R_TILEGX_IMM16_X1_HW2: 3541 case R_TILEGX_IMM16_X0_HW3: 3542 case R_TILEGX_IMM16_X1_HW3: 3543 case R_TILEGX_IMM16_X0_HW0_LAST: 3544 case R_TILEGX_IMM16_X1_HW0_LAST: 3545 case R_TILEGX_IMM16_X0_HW1_LAST: 3546 case R_TILEGX_IMM16_X1_HW1_LAST: 3547 case R_TILEGX_IMM16_X0_HW2_LAST: 3548 case R_TILEGX_IMM16_X1_HW2_LAST: 3549 if ((input_section->flags & SEC_ALLOC) == 0) 3550 break; 3551 3552 if ((info->shared 3553 && (h == NULL 3554 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 3555 || h->root.type != bfd_link_hash_undefweak) 3556 && (! howto->pc_relative 3557 || !SYMBOL_CALLS_LOCAL (info, h))) 3558 || (!info->shared 3559 && h != NULL 3560 && h->dynindx != -1 3561 && !h->non_got_ref 3562 && ((h->def_dynamic 3563 && !h->def_regular) 3564 || h->root.type == bfd_link_hash_undefweak 3565 || h->root.type == bfd_link_hash_undefined))) 3566 { 3567 Elf_Internal_Rela outrel; 3568 bfd_boolean skip, relocate = FALSE; 3569 3570 /* When generating a shared object, these relocations 3571 are copied into the output file to be resolved at run 3572 time. */ 3573 3574 BFD_ASSERT (sreloc != NULL); 3575 3576 skip = FALSE; 3577 3578 outrel.r_offset = 3579 _bfd_elf_section_offset (output_bfd, info, input_section, 3580 rel->r_offset); 3581 if (outrel.r_offset == (bfd_vma) -1) 3582 skip = TRUE; 3583 else if (outrel.r_offset == (bfd_vma) -2) 3584 skip = TRUE, relocate = TRUE; 3585 outrel.r_offset += (input_section->output_section->vma 3586 + input_section->output_offset); 3587 3588 switch (r_type) 3589 { 3590 case R_TILEGX_64_PCREL: 3591 case R_TILEGX_32_PCREL: 3592 case R_TILEGX_16_PCREL: 3593 case R_TILEGX_8_PCREL: 3594 /* If the symbol is not dynamic, we should not keep 3595 a dynamic relocation. But an .rela.* slot has been 3596 allocated for it, output R_TILEGX_NONE. 3597 FIXME: Add code tracking needed dynamic relocs as 3598 e.g. i386 has. */ 3599 if (h->dynindx == -1) 3600 skip = TRUE, relocate = TRUE; 3601 break; 3602 } 3603 3604 if (skip) 3605 memset (&outrel, 0, sizeof outrel); 3606 /* h->dynindx may be -1 if the symbol was marked to 3607 become local. */ 3608 else if (h != NULL && 3609 h->dynindx != -1 3610 && (! is_plt 3611 || !info->shared 3612 || !SYMBOLIC_BIND (info, h) 3613 || !h->def_regular)) 3614 { 3615 BFD_ASSERT (h->dynindx != -1); 3616 outrel.r_info = TILEGX_ELF_R_INFO (htab, rel, h->dynindx, r_type); 3617 outrel.r_addend = rel->r_addend; 3618 } 3619 else 3620 { 3621 if (r_type == R_TILEGX_32 || r_type == R_TILEGX_64) 3622 { 3623 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, 0, 3624 R_TILEGX_RELATIVE); 3625 outrel.r_addend = relocation + rel->r_addend; 3626 } 3627 else 3628 { 3629 long indx; 3630 3631 outrel.r_addend = relocation + rel->r_addend; 3632 3633 if (is_plt) 3634 sec = htab->elf.splt; 3635 3636 if (bfd_is_abs_section (sec)) 3637 indx = 0; 3638 else if (sec == NULL || sec->owner == NULL) 3639 { 3640 bfd_set_error (bfd_error_bad_value); 3641 return FALSE; 3642 } 3643 else 3644 { 3645 asection *osec; 3646 3647 /* We are turning this relocation into one 3648 against a section symbol. It would be 3649 proper to subtract the symbol's value, 3650 osec->vma, from the emitted reloc addend, 3651 but ld.so expects buggy relocs. */ 3652 osec = sec->output_section; 3653 indx = elf_section_data (osec)->dynindx; 3654 3655 if (indx == 0) 3656 { 3657 osec = htab->elf.text_index_section; 3658 indx = elf_section_data (osec)->dynindx; 3659 } 3660 3661 /* FIXME: we really should be able to link non-pic 3662 shared libraries. */ 3663 if (indx == 0) 3664 { 3665 BFD_FAIL (); 3666 (*_bfd_error_handler) 3667 (_("%B: probably compiled without -fPIC?"), 3668 input_bfd); 3669 bfd_set_error (bfd_error_bad_value); 3670 return FALSE; 3671 } 3672 } 3673 3674 outrel.r_info = TILEGX_ELF_R_INFO (htab, rel, indx, 3675 r_type); 3676 } 3677 } 3678 3679 tilegx_elf_append_rela (output_bfd, sreloc, &outrel); 3680 3681 /* This reloc will be computed at runtime, so there's no 3682 need to do anything now. */ 3683 if (! relocate) 3684 continue; 3685 } 3686 break; 3687 3688 case R_TILEGX_IMM16_X0_HW0_TLS_LE: 3689 case R_TILEGX_IMM16_X1_HW0_TLS_LE: 3690 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE: 3691 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE: 3692 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE: 3693 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE: 3694 if (info->shared) 3695 { 3696 Elf_Internal_Rela outrel; 3697 bfd_boolean skip; 3698 3699 BFD_ASSERT (sreloc != NULL); 3700 skip = FALSE; 3701 outrel.r_offset = 3702 _bfd_elf_section_offset (output_bfd, info, input_section, 3703 rel->r_offset); 3704 if (outrel.r_offset == (bfd_vma) -1) 3705 skip = TRUE; 3706 else if (outrel.r_offset == (bfd_vma) -2) 3707 skip = TRUE; 3708 outrel.r_offset += (input_section->output_section->vma 3709 + input_section->output_offset); 3710 if (skip) 3711 memset (&outrel, 0, sizeof outrel); 3712 else 3713 { 3714 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, 0, r_type); 3715 outrel.r_addend = relocation - dtpoff_base (info) 3716 + rel->r_addend; 3717 } 3718 3719 tilegx_elf_append_rela (output_bfd, sreloc, &outrel); 3720 continue; 3721 } 3722 relocation = tpoff (info, relocation); 3723 break; 3724 3725 case R_TILEGX_IMM16_X0_HW0_TLS_GD: 3726 case R_TILEGX_IMM16_X1_HW0_TLS_GD: 3727 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD: 3728 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD: 3729 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD: 3730 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD: 3731 case R_TILEGX_IMM16_X0_HW0_TLS_IE: 3732 case R_TILEGX_IMM16_X1_HW0_TLS_IE: 3733 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE: 3734 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE: 3735 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE: 3736 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE: 3737 r_type = tilegx_elf_tls_transition (info, r_type, h == NULL, 3738 input_section->sec_flg0); 3739 tls_type = GOT_UNKNOWN; 3740 if (h == NULL && local_got_offsets) 3741 tls_type = 3742 _bfd_tilegx_elf_local_got_tls_type (input_bfd) [r_symndx]; 3743 else if (h != NULL) 3744 { 3745 tls_type = tilegx_elf_hash_entry(h)->tls_type; 3746 if (!info->shared && h->dynindx == -1 && tls_type == GOT_TLS_IE) 3747 r_type = (!input_section->sec_flg0 3748 ? tilegx_tls_translate_to_le (r_type) 3749 : tilegx_tls_translate_to_ie (r_type)); 3750 } 3751 3752 if (tls_type == GOT_TLS_IE) 3753 r_type = tilegx_tls_translate_to_ie (r_type); 3754 3755 if (r_type == R_TILEGX_IMM16_X0_HW0_TLS_LE 3756 || r_type == R_TILEGX_IMM16_X1_HW0_TLS_LE 3757 || r_type == R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE 3758 || r_type == R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE 3759 || r_type == R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE 3760 || r_type == R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE) 3761 { 3762 relocation = tpoff (info, relocation); 3763 break; 3764 } 3765 3766 if (h != NULL) 3767 { 3768 off = h->got.offset; 3769 h->got.offset |= 1; 3770 } 3771 else 3772 { 3773 BFD_ASSERT (local_got_offsets != NULL); 3774 off = local_got_offsets[r_symndx]; 3775 local_got_offsets[r_symndx] |= 1; 3776 } 3777 3778 if (htab->elf.sgot == NULL) 3779 abort (); 3780 3781 if ((off & 1) != 0) 3782 off &= ~1; 3783 else 3784 { 3785 Elf_Internal_Rela outrel; 3786 int indx = 0; 3787 bfd_boolean need_relocs = FALSE; 3788 3789 if (htab->elf.srelgot == NULL) 3790 abort (); 3791 3792 if (h != NULL) 3793 { 3794 bfd_boolean dyn; 3795 dyn = htab->elf.dynamic_sections_created; 3796 3797 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 3798 && (!info->shared 3799 || !SYMBOL_REFERENCES_LOCAL (info, h))) 3800 { 3801 indx = h->dynindx; 3802 } 3803 } 3804 3805 /* The GOT entries have not been initialized yet. Do it 3806 now, and emit any relocations. */ 3807 if ((info->shared || indx != 0) 3808 && (h == NULL 3809 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 3810 || h->root.type != bfd_link_hash_undefweak)) 3811 need_relocs = TRUE; 3812 3813 switch (r_type) 3814 { 3815 case R_TILEGX_IMM16_X0_HW0_TLS_IE: 3816 case R_TILEGX_IMM16_X1_HW0_TLS_IE: 3817 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE: 3818 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE: 3819 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE: 3820 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE: 3821 if (need_relocs) { 3822 TILEGX_ELF_PUT_WORD (htab, output_bfd, 0, 3823 htab->elf.sgot->contents + off); 3824 outrel.r_offset = (htab->elf.sgot->output_section->vma 3825 + htab->elf.sgot->output_offset + off); 3826 outrel.r_addend = 0; 3827 if (indx == 0) 3828 outrel.r_addend = relocation - dtpoff_base (info); 3829 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, indx, 3830 TILEGX_ELF_TPOFF_RELOC (htab)); 3831 tilegx_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel); 3832 } else { 3833 TILEGX_ELF_PUT_WORD (htab, output_bfd, 3834 tpoff (info, relocation), 3835 htab->elf.sgot->contents + off); 3836 } 3837 break; 3838 3839 case R_TILEGX_IMM16_X0_HW0_TLS_GD: 3840 case R_TILEGX_IMM16_X1_HW0_TLS_GD: 3841 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD: 3842 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD: 3843 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD: 3844 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD: 3845 if (need_relocs) { 3846 outrel.r_offset = (htab->elf.sgot->output_section->vma 3847 + htab->elf.sgot->output_offset + off); 3848 outrel.r_addend = 0; 3849 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, indx, 3850 TILEGX_ELF_DTPMOD_RELOC (htab)); 3851 TILEGX_ELF_PUT_WORD (htab, output_bfd, 0, 3852 htab->elf.sgot->contents + off); 3853 tilegx_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel); 3854 if (indx == 0) 3855 { 3856 BFD_ASSERT (! unresolved_reloc); 3857 TILEGX_ELF_PUT_WORD (htab, output_bfd, 3858 relocation - dtpoff_base (info), 3859 (htab->elf.sgot->contents + off + 3860 TILEGX_ELF_WORD_BYTES (htab))); 3861 } 3862 else 3863 { 3864 TILEGX_ELF_PUT_WORD (htab, output_bfd, 0, 3865 (htab->elf.sgot->contents + off + 3866 TILEGX_ELF_WORD_BYTES (htab))); 3867 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, indx, 3868 TILEGX_ELF_DTPOFF_RELOC (htab)); 3869 outrel.r_offset += TILEGX_ELF_WORD_BYTES (htab); 3870 tilegx_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel); 3871 } 3872 } 3873 3874 else { 3875 /* If we are not emitting relocations for a 3876 general dynamic reference, then we must be in a 3877 static link or an executable link with the 3878 symbol binding locally. Mark it as belonging 3879 to module 1, the executable. */ 3880 TILEGX_ELF_PUT_WORD (htab, output_bfd, 1, 3881 htab->elf.sgot->contents + off ); 3882 TILEGX_ELF_PUT_WORD (htab, output_bfd, 3883 relocation - dtpoff_base (info), 3884 htab->elf.sgot->contents + off + 3885 TILEGX_ELF_WORD_BYTES (htab)); 3886 } 3887 break; 3888 } 3889 } 3890 3891 if (off >= (bfd_vma) -2) 3892 abort (); 3893 3894 relocation = off - got_base; 3895 unresolved_reloc = FALSE; 3896 howto = tilegx_elf_howto_table + r_type; 3897 break; 3898 3899 default: 3900 break; 3901 } 3902 3903 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 3904 because such sections are not SEC_ALLOC and thus ld.so will 3905 not process them. */ 3906 if (unresolved_reloc 3907 && !((input_section->flags & SEC_DEBUGGING) != 0 3908 && h->def_dynamic) 3909 && _bfd_elf_section_offset (output_bfd, info, input_section, 3910 rel->r_offset) != (bfd_vma) -1) 3911 (*_bfd_error_handler) 3912 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), 3913 input_bfd, 3914 input_section, 3915 (long) rel->r_offset, 3916 howto->name, 3917 h->root.root.string); 3918 3919 r = bfd_reloc_continue; 3920 3921 /* Get the operand creation function, if any. */ 3922 create_func = reloc_to_create_func[r_type]; 3923 if (create_func == NULL) 3924 { 3925 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3926 contents, rel->r_offset, 3927 relocation, rel->r_addend); 3928 } 3929 else 3930 { 3931 if (howto->pc_relative) 3932 { 3933 relocation -= 3934 input_section->output_section->vma + input_section->output_offset; 3935 if (howto->pcrel_offset) 3936 relocation -= rel->r_offset; 3937 } 3938 3939 bfd_byte *data; 3940 3941 /* Add the relocation addend if any to the final target value */ 3942 relocation += rel->r_addend; 3943 3944 /* Do basic range checking */ 3945 r = bfd_check_overflow (howto->complain_on_overflow, 3946 howto->bitsize, 3947 howto->rightshift, 3948 TILEGX_ELF_WORD_BYTES (htab) * 8, 3949 relocation); 3950 3951 /* 3952 * Write the relocated value out into the raw section data. 3953 * Don't put a relocation out in the .rela section. 3954 */ 3955 tilegx_bundle_bits mask = create_func(-1); 3956 tilegx_bundle_bits value = create_func(relocation >> howto->rightshift); 3957 3958 /* Only touch bytes while the mask is not 0, so we 3959 don't write to out of bounds memory if this is actually 3960 a 16-bit switch instruction. */ 3961 for (data = contents + rel->r_offset; mask != 0; data++) 3962 { 3963 bfd_byte byte_mask = (bfd_byte)mask; 3964 *data = (*data & ~byte_mask) | ((bfd_byte)value & byte_mask); 3965 mask >>= 8; 3966 value >>= 8; 3967 } 3968 } 3969 3970 if (r != bfd_reloc_ok) 3971 { 3972 const char *msg = NULL; 3973 3974 switch (r) 3975 { 3976 case bfd_reloc_overflow: 3977 r = info->callbacks->reloc_overflow 3978 (info, (h ? &h->root : NULL), name, howto->name, 3979 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 3980 break; 3981 3982 case bfd_reloc_undefined: 3983 r = info->callbacks->undefined_symbol 3984 (info, name, input_bfd, input_section, rel->r_offset, 3985 TRUE); 3986 break; 3987 3988 case bfd_reloc_outofrange: 3989 msg = _("internal error: out of range error"); 3990 break; 3991 3992 case bfd_reloc_notsupported: 3993 msg = _("internal error: unsupported relocation error"); 3994 break; 3995 3996 case bfd_reloc_dangerous: 3997 msg = _("internal error: dangerous relocation"); 3998 break; 3999 4000 default: 4001 msg = _("internal error: unknown error"); 4002 break; 4003 } 4004 4005 if (msg) 4006 r = info->callbacks->warning 4007 (info, msg, name, input_bfd, input_section, rel->r_offset); 4008 4009 if (! r) 4010 return FALSE; 4011 } 4012 } 4013 4014 return TRUE; 4015 } 4016 4017 /* Finish up dynamic symbol handling. We set the contents of various 4018 dynamic sections here. */ 4019 4020 bfd_boolean 4021 tilegx_elf_finish_dynamic_symbol (bfd *output_bfd, 4022 struct bfd_link_info *info, 4023 struct elf_link_hash_entry *h, 4024 Elf_Internal_Sym *sym) 4025 { 4026 struct tilegx_elf_link_hash_table *htab; 4027 4028 htab = tilegx_elf_hash_table (info); 4029 BFD_ASSERT (htab != NULL); 4030 4031 if (h->plt.offset != (bfd_vma) -1) 4032 { 4033 asection *splt; 4034 asection *srela; 4035 asection *sgotplt; 4036 Elf_Internal_Rela rela; 4037 bfd_byte *loc; 4038 bfd_vma r_offset; 4039 const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); 4040 4041 4042 int rela_index; 4043 4044 /* This symbol has an entry in the PLT. Set it up. */ 4045 4046 BFD_ASSERT (h->dynindx != -1); 4047 4048 splt = htab->elf.splt; 4049 srela = htab->elf.srelplt; 4050 sgotplt = htab->elf.sgotplt; 4051 4052 if (splt == NULL || srela == NULL) 4053 abort (); 4054 4055 /* Fill in the entry in the procedure linkage table. */ 4056 rela_index = tilegx_plt_entry_build (output_bfd, htab, splt, sgotplt, 4057 h->plt.offset, &r_offset); 4058 4059 /* Fill in the entry in the global offset table, which initially points 4060 to the beginning of the plt. */ 4061 TILEGX_ELF_PUT_WORD (htab, output_bfd, 4062 splt->output_section->vma + splt->output_offset, 4063 sgotplt->contents + r_offset); 4064 4065 /* Fill in the entry in the .rela.plt section. */ 4066 rela.r_offset = (sgotplt->output_section->vma 4067 + sgotplt->output_offset 4068 + r_offset); 4069 rela.r_addend = 0; 4070 rela.r_info = TILEGX_ELF_R_INFO (htab, NULL, h->dynindx, R_TILEGX_JMP_SLOT); 4071 4072 loc = srela->contents + rela_index * TILEGX_ELF_RELA_BYTES (htab); 4073 bed->s->swap_reloca_out (output_bfd, &rela, loc); 4074 4075 if (!h->def_regular) 4076 { 4077 /* Mark the symbol as undefined, rather than as defined in 4078 the .plt section. Leave the value alone. */ 4079 sym->st_shndx = SHN_UNDEF; 4080 /* If the symbol is weak, we do need to clear the value. 4081 Otherwise, the PLT entry would provide a definition for 4082 the symbol even if the symbol wasn't defined anywhere, 4083 and so the symbol would never be NULL. */ 4084 if (!h->ref_regular_nonweak) 4085 sym->st_value = 0; 4086 } 4087 } 4088 4089 if (h->got.offset != (bfd_vma) -1 4090 && tilegx_elf_hash_entry(h)->tls_type != GOT_TLS_GD 4091 && tilegx_elf_hash_entry(h)->tls_type != GOT_TLS_IE) 4092 { 4093 asection *sgot; 4094 asection *srela; 4095 Elf_Internal_Rela rela; 4096 4097 /* This symbol has an entry in the GOT. Set it up. */ 4098 4099 sgot = htab->elf.sgot; 4100 srela = htab->elf.srelgot; 4101 BFD_ASSERT (sgot != NULL && srela != NULL); 4102 4103 rela.r_offset = (sgot->output_section->vma 4104 + sgot->output_offset 4105 + (h->got.offset &~ (bfd_vma) 1)); 4106 4107 /* If this is a -Bsymbolic link, and the symbol is defined 4108 locally, we just want to emit a RELATIVE reloc. Likewise if 4109 the symbol was forced to be local because of a version file. 4110 The entry in the global offset table will already have been 4111 initialized in the relocate_section function. */ 4112 if (info->shared 4113 && (info->symbolic || h->dynindx == -1) 4114 && h->def_regular) 4115 { 4116 asection *sec = h->root.u.def.section; 4117 rela.r_info = TILEGX_ELF_R_INFO (htab, NULL, 0, R_TILEGX_RELATIVE); 4118 rela.r_addend = (h->root.u.def.value 4119 + sec->output_section->vma 4120 + sec->output_offset); 4121 } 4122 else 4123 { 4124 rela.r_info = TILEGX_ELF_R_INFO (htab, NULL, h->dynindx, R_TILEGX_GLOB_DAT); 4125 rela.r_addend = 0; 4126 } 4127 4128 TILEGX_ELF_PUT_WORD (htab, output_bfd, 0, 4129 sgot->contents + (h->got.offset & ~(bfd_vma) 1)); 4130 tilegx_elf_append_rela (output_bfd, srela, &rela); 4131 } 4132 4133 if (h->needs_copy) 4134 { 4135 asection *s; 4136 Elf_Internal_Rela rela; 4137 4138 /* This symbols needs a copy reloc. Set it up. */ 4139 BFD_ASSERT (h->dynindx != -1); 4140 4141 s = htab->srelbss; 4142 BFD_ASSERT (s != NULL); 4143 4144 rela.r_offset = (h->root.u.def.value 4145 + h->root.u.def.section->output_section->vma 4146 + h->root.u.def.section->output_offset); 4147 rela.r_info = TILEGX_ELF_R_INFO (htab, NULL, h->dynindx, R_TILEGX_COPY); 4148 rela.r_addend = 0; 4149 tilegx_elf_append_rela (output_bfd, s, &rela); 4150 } 4151 4152 /* Mark some specially defined symbols as absolute. */ 4153 if (strcmp (h->root.root.string, "_DYNAMIC") == 0 4154 || (h == htab->elf.hgot || h == htab->elf.hplt)) 4155 sym->st_shndx = SHN_ABS; 4156 4157 return TRUE; 4158 } 4159 4160 /* Finish up the dynamic sections. */ 4161 4162 static bfd_boolean 4163 tilegx_finish_dyn (bfd *output_bfd, struct bfd_link_info *info, 4164 bfd *dynobj, asection *sdyn, 4165 asection *splt ATTRIBUTE_UNUSED) 4166 { 4167 struct tilegx_elf_link_hash_table *htab; 4168 const struct elf_backend_data *bed; 4169 bfd_byte *dyncon, *dynconend; 4170 size_t dynsize; 4171 4172 htab = tilegx_elf_hash_table (info); 4173 BFD_ASSERT (htab != NULL); 4174 bed = get_elf_backend_data (output_bfd); 4175 dynsize = bed->s->sizeof_dyn; 4176 dynconend = sdyn->contents + sdyn->size; 4177 4178 for (dyncon = sdyn->contents; dyncon < dynconend; dyncon += dynsize) 4179 { 4180 Elf_Internal_Dyn dyn; 4181 asection *s; 4182 4183 bed->s->swap_dyn_in (dynobj, dyncon, &dyn); 4184 4185 switch (dyn.d_tag) 4186 { 4187 case DT_PLTGOT: 4188 s = htab->elf.sgotplt; 4189 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 4190 break; 4191 case DT_JMPREL: 4192 s = htab->elf.srelplt; 4193 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 4194 break; 4195 case DT_PLTRELSZ: 4196 s = htab->elf.srelplt; 4197 dyn.d_un.d_val = s->size; 4198 break; 4199 default: 4200 continue; 4201 } 4202 4203 bed->s->swap_dyn_out (output_bfd, &dyn, dyncon); 4204 } 4205 return TRUE; 4206 } 4207 4208 bfd_boolean 4209 tilegx_elf_finish_dynamic_sections (bfd *output_bfd, 4210 struct bfd_link_info *info) 4211 { 4212 bfd *dynobj; 4213 asection *sdyn; 4214 struct tilegx_elf_link_hash_table *htab; 4215 4216 htab = tilegx_elf_hash_table (info); 4217 BFD_ASSERT (htab != NULL); 4218 dynobj = htab->elf.dynobj; 4219 4220 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 4221 4222 if (elf_hash_table (info)->dynamic_sections_created) 4223 { 4224 asection *splt; 4225 bfd_boolean ret; 4226 4227 splt = htab->elf.splt; 4228 BFD_ASSERT (splt != NULL && sdyn != NULL); 4229 4230 ret = tilegx_finish_dyn (output_bfd, info, dynobj, sdyn, splt); 4231 4232 if (ret != TRUE) 4233 return ret; 4234 4235 /* Fill in the head and tail entries in the procedure linkage table. */ 4236 if (splt->size > 0) 4237 { 4238 memcpy (splt->contents, 4239 ABI_64_P (output_bfd) ? 4240 tilegx64_plt0_entry : tilegx32_plt0_entry, 4241 PLT_HEADER_SIZE); 4242 4243 memcpy (splt->contents + splt->size - PLT_TAIL_SIZE, 4244 ABI_64_P (output_bfd) ? 4245 tilegx64_plt_tail_entry : tilegx32_plt_tail_entry, 4246 PLT_TAIL_SIZE); 4247 } 4248 4249 elf_section_data (splt->output_section)->this_hdr.sh_entsize 4250 = PLT_ENTRY_SIZE; 4251 } 4252 4253 if (htab->elf.sgotplt) 4254 { 4255 if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) 4256 { 4257 (*_bfd_error_handler) 4258 (_("discarded output section: `%A'"), htab->elf.sgotplt); 4259 return FALSE; 4260 } 4261 4262 if (htab->elf.sgotplt->size > 0) 4263 { 4264 /* Write the first two entries in .got.plt, needed for the dynamic 4265 linker. */ 4266 TILEGX_ELF_PUT_WORD (htab, output_bfd, (bfd_vma) -1, 4267 htab->elf.sgotplt->contents); 4268 TILEGX_ELF_PUT_WORD (htab, output_bfd, (bfd_vma) 0, 4269 htab->elf.sgotplt->contents 4270 + GOT_ENTRY_SIZE (htab)); 4271 } 4272 4273 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4274 GOT_ENTRY_SIZE (htab); 4275 } 4276 4277 if (htab->elf.sgot) 4278 { 4279 if (htab->elf.sgot->size > 0) 4280 { 4281 /* Set the first entry in the global offset table to the address of 4282 the dynamic section. */ 4283 bfd_vma val = (sdyn ? 4284 sdyn->output_section->vma + sdyn->output_offset : 4285 0); 4286 TILEGX_ELF_PUT_WORD (htab, output_bfd, val, 4287 htab->elf.sgot->contents); 4288 } 4289 4290 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4291 GOT_ENTRY_SIZE (htab); 4292 } 4293 4294 return TRUE; 4295 } 4296 4297 4298 4299 /* Return address for Ith PLT stub in section PLT, for relocation REL 4300 or (bfd_vma) -1 if it should not be included. */ 4301 4302 bfd_vma 4303 tilegx_elf_plt_sym_val (bfd_vma i, const asection *plt, 4304 const arelent *rel ATTRIBUTE_UNUSED) 4305 { 4306 return plt->vma + PLT_HEADER_SIZE + i * PLT_ENTRY_SIZE; 4307 } 4308 4309 enum elf_reloc_type_class 4310 tilegx_reloc_type_class (const Elf_Internal_Rela *rela) 4311 { 4312 switch ((int) TILEGX_ELF_R_TYPE (rela->r_info)) 4313 { 4314 case R_TILEGX_RELATIVE: 4315 return reloc_class_relative; 4316 case R_TILEGX_JMP_SLOT: 4317 return reloc_class_plt; 4318 case R_TILEGX_COPY: 4319 return reloc_class_copy; 4320 default: 4321 return reloc_class_normal; 4322 } 4323 } 4324 4325 int 4326 tilegx_additional_program_headers (bfd *abfd, 4327 struct bfd_link_info *info ATTRIBUTE_UNUSED) 4328 { 4329 /* Each .intrpt section specified by the user adds another PT_LOAD 4330 header since the sections are discontiguous. */ 4331 static const char intrpt_sections[4][9] = 4332 { 4333 ".intrpt0", ".intrpt1", ".intrpt2", ".intrpt3" 4334 }; 4335 int count = 0; 4336 int i; 4337 4338 for (i = 0; i < 4; i++) 4339 { 4340 asection *sec = bfd_get_section_by_name (abfd, intrpt_sections[i]); 4341 if (sec != NULL && (sec->flags & SEC_LOAD) != 0) 4342 ++count; 4343 } 4344 4345 /* Add four "padding" headers in to leave room in case a custom linker 4346 script does something fancy. Otherwise ld complains that it ran 4347 out of program headers and refuses to link. */ 4348 count += 4; 4349 4350 return count; 4351 } 4352 4353 4354 bfd_boolean 4355 _bfd_tilegx_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 4356 { 4357 const char *targ1 = bfd_get_target (ibfd); 4358 const char *targ2 = bfd_get_target (obfd); 4359 4360 if (strcmp (targ1, targ2) != 0) 4361 { 4362 (*_bfd_error_handler) 4363 (_("%B: Cannot link together %s and %s objects."), 4364 ibfd, targ1, targ2); 4365 bfd_set_error (bfd_error_bad_value); 4366 return FALSE; 4367 } 4368 4369 return TRUE; 4370 } 4371