1 /* Or1k-specific support for 32-bit ELF. 2 Copyright 2001-2014 Free Software Foundation, Inc. 3 Contributed for OR32 by Johan Rydberg, jrydberg (at) opencores.org 4 5 PIC parts added by Stefan Kristiansson, stefan.kristiansson (at) saunalahti.fi, 6 largely based on elf32-m32r.c and elf32-microblaze.c. 7 8 This file is part of BFD, the Binary File Descriptor library. 9 10 This program is free software; you can redistribute it and/or modify 11 it under the terms of the GNU General Public License as published by 12 the Free Software Foundation; either version 3 of the License, or 13 (at your option) any later version. 14 15 This program is distributed in the hope that it will be useful, 16 but WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 GNU General Public License for more details. 19 20 You should have received a copy of the GNU General Public License 21 along with this program; if not, see <http://www.gnu.org/licenses/>. */ 22 23 #include "sysdep.h" 24 #include "bfd.h" 25 #include "libbfd.h" 26 #include "elf-bfd.h" 27 #include "elf/or1k.h" 28 #include "libiberty.h" 29 30 #define PLT_ENTRY_SIZE 20 31 32 #define PLT0_ENTRY_WORD0 0x19800000 /* l.movhi r12, 0 <- hi(.got+4) */ 33 #define PLT0_ENTRY_WORD1 0xa98c0000 /* l.ori r12, r12, 0 <- lo(.got+4) */ 34 #define PLT0_ENTRY_WORD2 0x85ec0004 /* l.lwz r15, 4(r12) <- *(.got+8)*/ 35 #define PLT0_ENTRY_WORD3 0x44007800 /* l.jr r15 */ 36 #define PLT0_ENTRY_WORD4 0x858c0000 /* l.lwz r12, 0(r12) */ 37 38 #define PLT0_PIC_ENTRY_WORD0 0x85900004 /* l.lwz r12, 4(r16) */ 39 #define PLT0_PIC_ENTRY_WORD1 0x85f00008 /* l.lwz r15, 8(r16) */ 40 #define PLT0_PIC_ENTRY_WORD2 0x44007800 /* l.jr r15 */ 41 #define PLT0_PIC_ENTRY_WORD3 0x15000000 /* l.nop */ 42 #define PLT0_PIC_ENTRY_WORD4 0x15000000 /* l.nop */ 43 44 #define PLT_ENTRY_WORD0 0x19800000 /* l.movhi r12, 0 <- hi(got idx addr) */ 45 #define PLT_ENTRY_WORD1 0xa98c0000 /* l.ori r12, r12, 0 <- lo(got idx addr) */ 46 #define PLT_ENTRY_WORD2 0x858c0000 /* l.lwz r12, 0(r12) */ 47 #define PLT_ENTRY_WORD3 0x44006000 /* l.jr r12 */ 48 #define PLT_ENTRY_WORD4 0xa9600000 /* l.ori r11, r0, 0 <- reloc offset */ 49 50 #define PLT_PIC_ENTRY_WORD0 0x85900000 /* l.lwz r12, 0(r16) <- index in got */ 51 #define PLT_PIC_ENTRY_WORD1 0xa9600000 /* l.ori r11, r0, 0 <- reloc offset */ 52 #define PLT_PIC_ENTRY_WORD2 0x44006000 /* l.jr r12 */ 53 #define PLT_PIC_ENTRY_WORD3 0x15000000 /* l.nop */ 54 #define PLT_PIC_ENTRY_WORD4 0x15000000 /* l.nop */ 55 56 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 57 58 static reloc_howto_type or1k_elf_howto_table[] = 59 { 60 /* This reloc does nothing. */ 61 HOWTO (R_OR1K_NONE, /* type */ 62 0, /* rightshift */ 63 2, /* size (0 = byte, 1 = short, 2 = long) */ 64 32, /* bitsize */ 65 FALSE, /* pc_relative */ 66 0, /* bitpos */ 67 complain_overflow_dont, /* complain_on_overflow */ 68 bfd_elf_generic_reloc, /* special_function */ 69 "R_OR1K_NONE", /* name */ 70 FALSE, /* partial_inplace */ 71 0, /* src_mask */ 72 0, /* dst_mask */ 73 FALSE), /* pcrel_offset */ 74 75 HOWTO (R_OR1K_32, 76 0, /* rightshift */ 77 2, /* size (0 = byte, 1 = short, 2 = long) */ 78 32, /* bitsize */ 79 FALSE, /* pc_relative */ 80 0, /* bitpos */ 81 complain_overflow_unsigned, /* complain_on_overflow */ 82 bfd_elf_generic_reloc, /* special_function */ 83 "R_OR1K_32", /* name */ 84 FALSE, /* partial_inplace */ 85 0, /* src_mask */ 86 0xffffffff, /* dst_mask */ 87 FALSE), /* pcrel_offset */ 88 89 HOWTO (R_OR1K_16, 90 0, /* rightshift */ 91 1, /* size (0 = byte, 1 = short, 2 = long) */ 92 16, /* bitsize */ 93 FALSE, /* pc_relative */ 94 0, /* bitpos */ 95 complain_overflow_unsigned, /* complain_on_overflow */ 96 bfd_elf_generic_reloc, /* special_function */ 97 "R_OR1K_16", /* name */ 98 FALSE, /* partial_inplace */ 99 0, /* src_mask */ 100 0xffff, /* dst_mask */ 101 FALSE), /* pcrel_offset */ 102 103 HOWTO (R_OR1K_8, 104 0, /* rightshift */ 105 0, /* size (0 = byte, 1 = short, 2 = long) */ 106 8, /* bitsize */ 107 FALSE, /* pc_relative */ 108 0, /* bitpos */ 109 complain_overflow_unsigned, /* complain_on_overflow */ 110 bfd_elf_generic_reloc, /* special_function */ 111 "R_OR1K_8", /* name */ 112 FALSE, /* partial_inplace */ 113 0, /* src_mask */ 114 0xff, /* dst_mask */ 115 FALSE), /* pcrel_offset */ 116 117 HOWTO (R_OR1K_LO_16_IN_INSN, /* type */ 118 0, /* rightshift */ 119 2, /* size (0 = byte, 1 = short, 2 = long) */ 120 16, /* bitsize */ 121 FALSE, /* pc_relative */ 122 0, /* bitpos */ 123 complain_overflow_dont, /* complain_on_overflow */ 124 bfd_elf_generic_reloc, /* special_function */ 125 "R_OR1K_LO_16_IN_INSN", /* name */ 126 FALSE, /* partial_inplace */ 127 0, /* src_mask */ 128 0x0000ffff, /* dst_mask */ 129 FALSE), /* pcrel_offset */ 130 131 HOWTO (R_OR1K_HI_16_IN_INSN, /* type */ 132 16, /* rightshift */ 133 2, /* size (0 = byte, 1 = short, 2 = long) */ 134 16, /* bitsize */ 135 FALSE, /* pc_relative */ 136 0, /* bitpos */ 137 complain_overflow_dont, /* complain_on_overflow */ 138 bfd_elf_generic_reloc, /* special_function */ 139 "R_OR1K_HI_16_IN_INSN", /* name */ 140 FALSE, /* partial_inplace */ 141 0, /* src_mask */ 142 0x0000ffff, /* dst_mask */ 143 FALSE), /* pcrel_offset */ 144 145 /* A PC relative 26 bit relocation, right shifted by 2. */ 146 HOWTO (R_OR1K_INSN_REL_26, /* type */ 147 2, /* rightshift */ 148 2, /* size (0 = byte, 1 = short, 2 = long) */ 149 26, /* bitsize */ 150 TRUE, /* pc_relative */ 151 0, /* bitpos */ 152 complain_overflow_signed, /* complain_on_overflow */ 153 bfd_elf_generic_reloc, /* special_function */ 154 "R_OR1K_INSN_REL_26", /* name */ 155 FALSE, /* partial_inplace */ 156 0, /* src_mask */ 157 0x03ffffff, /* dst_mask */ 158 TRUE), /* pcrel_offset */ 159 160 /* GNU extension to record C++ vtable hierarchy. */ 161 HOWTO (R_OR1K_GNU_VTINHERIT, /* type */ 162 0, /* rightshift */ 163 2, /* size (0 = byte, 1 = short, 2 = long) */ 164 0, /* bitsize */ 165 FALSE, /* pc_relative */ 166 0, /* bitpos */ 167 complain_overflow_dont, /* complain_on_overflow */ 168 NULL, /* special_function */ 169 "R_OR1K_GNU_VTINHERIT", /* name */ 170 FALSE, /* partial_inplace */ 171 0, /* src_mask */ 172 0, /* dst_mask */ 173 FALSE), /* pcrel_offset */ 174 175 /* GNU extension to record C++ vtable member usage. */ 176 HOWTO (R_OR1K_GNU_VTENTRY, /* type */ 177 0, /* rightshift */ 178 2, /* size (0 = byte, 1 = short, 2 = long) */ 179 0, /* bitsize */ 180 FALSE, /* pc_relative */ 181 0, /* bitpos */ 182 complain_overflow_dont, /* complain_on_overflow */ 183 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 184 "R_OR1K_GNU_VTENTRY", /* name */ 185 FALSE, /* partial_inplace */ 186 0, /* src_mask */ 187 0, /* dst_mask */ 188 FALSE), /* pcrel_offset */ 189 190 HOWTO (R_OR1K_32_PCREL, 191 0, /* rightshift */ 192 2, /* size (0 = byte, 1 = short, 2 = long) */ 193 32, /* bitsize */ 194 TRUE, /* pc_relative */ 195 0, /* bitpos */ 196 complain_overflow_signed, /* complain_on_overflow */ 197 bfd_elf_generic_reloc, /* special_function */ 198 "R_OR1K_32_PCREL", /* name */ 199 FALSE, /* partial_inplace */ 200 0, /* src_mask */ 201 0xffffffff, /* dst_mask */ 202 FALSE), /* pcrel_offset */ 203 204 HOWTO (R_OR1K_16_PCREL, 205 0, /* rightshift */ 206 1, /* size (0 = byte, 1 = short, 2 = long) */ 207 16, /* bitsize */ 208 TRUE, /* pc_relative */ 209 0, /* bitpos */ 210 complain_overflow_signed, /* complain_on_overflow */ 211 bfd_elf_generic_reloc, /* special_function */ 212 "R_OR1K_16_PCREL", /* name */ 213 FALSE, /* partial_inplace */ 214 0, /* src_mask */ 215 0xffff, /* dst_mask */ 216 FALSE), /* pcrel_offset */ 217 218 HOWTO (R_OR1K_8_PCREL, 219 0, /* rightshift */ 220 0, /* size (0 = byte, 1 = short, 2 = long) */ 221 8, /* bitsize */ 222 TRUE, /* pc_relative */ 223 0, /* bitpos */ 224 complain_overflow_signed, /* complain_on_overflow */ 225 bfd_elf_generic_reloc, /* special_function */ 226 "R_OR1K_8_PCREL", /* name */ 227 FALSE, /* partial_inplace */ 228 0, /* src_mask */ 229 0xff, /* dst_mask */ 230 FALSE), /* pcrel_offset */ 231 232 HOWTO (R_OR1K_GOTPC_HI16, /* Type. */ 233 16, /* Rightshift. */ 234 2, /* Size (0 = byte, 1 = short, 2 = long). */ 235 16, /* Bitsize. */ 236 TRUE, /* PC_relative. */ 237 0, /* Bitpos. */ 238 complain_overflow_dont, /* Complain on overflow. */ 239 bfd_elf_generic_reloc, /* Special Function. */ 240 "R_OR1K_GOTPC_HI16", /* Name. */ 241 FALSE, /* Partial Inplace. */ 242 0, /* Source Mask. */ 243 0xffff, /* Dest Mask. */ 244 TRUE), /* PC relative offset? */ 245 246 HOWTO (R_OR1K_GOTPC_LO16, /* Type. */ 247 0, /* Rightshift. */ 248 2, /* Size (0 = byte, 1 = short, 2 = long). */ 249 16, /* Bitsize. */ 250 TRUE, /* PC_relative. */ 251 0, /* Bitpos. */ 252 complain_overflow_dont, /* Complain on overflow. */ 253 bfd_elf_generic_reloc, /* Special Function. */ 254 "R_OR1K_GOTPC_LO16", /* Name. */ 255 FALSE, /* Partial Inplace. */ 256 0, /* Source Mask. */ 257 0xffff, /* Dest Mask. */ 258 TRUE), /* PC relative offset? */ 259 260 HOWTO (R_OR1K_GOT16, /* type */ 261 0, /* rightshift */ 262 2, /* size (0 = byte, 1 = short, 2 = long) */ 263 16, /* bitsize */ 264 FALSE, /* pc_relative */ 265 0, /* bitpos */ 266 complain_overflow_signed, /* complain_on_overflow */ 267 bfd_elf_generic_reloc, /* special_function */ 268 "R_OR1K_GOT16", /* name */ 269 FALSE, /* partial_inplace */ 270 0, /* src_mask */ 271 0xffff, /* dst_mask */ 272 FALSE), /* pcrel_offset */ 273 274 /* A 26 bit PLT relocation. Shifted by 2. */ 275 HOWTO (R_OR1K_PLT26, /* Type. */ 276 2, /* Rightshift. */ 277 2, /* Size (0 = byte, 1 = short, 2 = long). */ 278 26, /* Bitsize. */ 279 TRUE, /* PC_relative. */ 280 0, /* Bitpos. */ 281 complain_overflow_dont, /* Complain on overflow. */ 282 bfd_elf_generic_reloc,/* Special Function. */ 283 "R_OR1K_PLT26", /* Name. */ 284 FALSE, /* Partial Inplace. */ 285 0, /* Source Mask. */ 286 0x03ffffff, /* Dest Mask. */ 287 TRUE), /* PC relative offset? */ 288 289 HOWTO (R_OR1K_GOTOFF_HI16, /* type */ 290 16, /* rightshift */ 291 2, /* size (0 = byte, 1 = short, 2 = long) */ 292 16, /* bitsize */ 293 FALSE, /* pc_relative */ 294 0, /* bitpos */ 295 complain_overflow_dont, /* complain_on_overflow */ 296 bfd_elf_generic_reloc, /* special_function */ 297 "R_OR1K_GOTOFF_HI16", /* name */ 298 FALSE, /* partial_inplace */ 299 0x0, /* src_mask */ 300 0xffff, /* dst_mask */ 301 FALSE), /* pcrel_offset */ 302 303 HOWTO (R_OR1K_GOTOFF_LO16, /* type */ 304 0, /* rightshift */ 305 2, /* size (0 = byte, 1 = short, 2 = long) */ 306 16, /* bitsize */ 307 FALSE, /* pc_relative */ 308 0, /* bitpos */ 309 complain_overflow_dont, /* complain_on_overflow */ 310 bfd_elf_generic_reloc, /* special_function */ 311 "R_OR1K_GOTOFF_LO16", /* name */ 312 FALSE, /* partial_inplace */ 313 0x0, /* src_mask */ 314 0xffff, /* dst_mask */ 315 FALSE), /* pcrel_offset */ 316 317 HOWTO (R_OR1K_COPY, /* type */ 318 0, /* rightshift */ 319 2, /* size (0 = byte, 1 = short, 2 = long) */ 320 32, /* bitsize */ 321 FALSE, /* pc_relative */ 322 0, /* bitpos */ 323 complain_overflow_bitfield, /* complain_on_overflow */ 324 bfd_elf_generic_reloc, /* special_function */ 325 "R_OR1K_COPY", /* name */ 326 FALSE, /* partial_inplace */ 327 0xffffffff, /* src_mask */ 328 0xffffffff, /* dst_mask */ 329 FALSE), /* pcrel_offset */ 330 331 HOWTO (R_OR1K_GLOB_DAT, /* type */ 332 0, /* rightshift */ 333 2, /* size (0 = byte, 1 = short, 2 = long) */ 334 32, /* bitsize */ 335 FALSE, /* pc_relative */ 336 0, /* bitpos */ 337 complain_overflow_bitfield, /* complain_on_overflow */ 338 bfd_elf_generic_reloc, /* special_function */ 339 "R_OR1K_GLOB_DAT", /* name */ 340 FALSE, /* partial_inplace */ 341 0xffffffff, /* src_mask */ 342 0xffffffff, /* dst_mask */ 343 FALSE), /* pcrel_offset */ 344 345 HOWTO (R_OR1K_JMP_SLOT, /* type */ 346 0, /* rightshift */ 347 2, /* size (0 = byte, 1 = short, 2 = long) */ 348 32, /* bitsize */ 349 FALSE, /* pc_relative */ 350 0, /* bitpos */ 351 complain_overflow_bitfield, /* complain_on_overflow */ 352 bfd_elf_generic_reloc, /* special_function */ 353 "R_OR1K_JMP_SLOT", /* name */ 354 FALSE, /* partial_inplace */ 355 0xffffffff, /* src_mask */ 356 0xffffffff, /* dst_mask */ 357 FALSE), /* pcrel_offset */ 358 359 HOWTO (R_OR1K_RELATIVE, /* type */ 360 0, /* rightshift */ 361 2, /* size (0 = byte, 1 = short, 2 = long) */ 362 32, /* bitsize */ 363 FALSE, /* pc_relative */ 364 0, /* bitpos */ 365 complain_overflow_bitfield, /* complain_on_overflow */ 366 bfd_elf_generic_reloc, /* special_function */ 367 "R_OR1K_RELATIVE", /* name */ 368 FALSE, /* partial_inplace */ 369 0xffffffff, /* src_mask */ 370 0xffffffff, /* dst_mask */ 371 FALSE), /* pcrel_offset */ 372 373 HOWTO (R_OR1K_TLS_GD_HI16, /* type */ 374 16, /* rightshift */ 375 2, /* size (0 = byte, 1 = short, 2 = long) */ 376 16, /* bitsize */ 377 FALSE, /* pc_relative */ 378 0, /* bitpos */ 379 complain_overflow_dont, /* complain_on_overflow */ 380 bfd_elf_generic_reloc, /* special_function */ 381 "R_OR1K_TLS_GD_HI16", /* name */ 382 FALSE, /* partial_inplace */ 383 0x0, /* src_mask */ 384 0xffff, /* dst_mask */ 385 FALSE), /* pcrel_offset */ 386 387 HOWTO (R_OR1K_TLS_GD_LO16, /* type */ 388 0, /* rightshift */ 389 2, /* size (0 = byte, 1 = short, 2 = long) */ 390 16, /* bitsize */ 391 FALSE, /* pc_relative */ 392 0, /* bitpos */ 393 complain_overflow_dont, /* complain_on_overflow */ 394 bfd_elf_generic_reloc, /* special_function */ 395 "R_OR1K_TLS_GD_LO16", /* name */ 396 FALSE, /* partial_inplace */ 397 0x0, /* src_mask */ 398 0xffff, /* dst_mask */ 399 FALSE), /* pcrel_offset */ 400 401 HOWTO (R_OR1K_TLS_LDM_HI16, /* type */ 402 16, /* rightshift */ 403 2, /* size (0 = byte, 1 = short, 2 = long) */ 404 16, /* bitsize */ 405 FALSE, /* pc_relative */ 406 0, /* bitpos */ 407 complain_overflow_dont, /* complain_on_overflow */ 408 bfd_elf_generic_reloc, /* special_function */ 409 "R_OR1K_TLS_LDM_HI16", /* name */ 410 FALSE, /* partial_inplace */ 411 0x0, /* src_mask */ 412 0xffff, /* dst_mask */ 413 FALSE), /* pcrel_offset */ 414 415 HOWTO (R_OR1K_TLS_LDM_LO16, /* type */ 416 0, /* rightshift */ 417 2, /* size (0 = byte, 1 = short, 2 = long) */ 418 16, /* bitsize */ 419 FALSE, /* pc_relative */ 420 0, /* bitpos */ 421 complain_overflow_dont, /* complain_on_overflow */ 422 bfd_elf_generic_reloc, /* special_function */ 423 "R_OR1K_TLS_LDM_LO16", /* name */ 424 FALSE, /* partial_inplace */ 425 0x0, /* src_mask */ 426 0xffff, /* dst_mask */ 427 FALSE), /* pcrel_offset */ 428 429 HOWTO (R_OR1K_TLS_LDO_HI16, /* type */ 430 16, /* rightshift */ 431 2, /* size (0 = byte, 1 = short, 2 = long) */ 432 16, /* bitsize */ 433 FALSE, /* pc_relative */ 434 0, /* bitpos */ 435 complain_overflow_dont, /* complain_on_overflow */ 436 bfd_elf_generic_reloc, /* special_function */ 437 "R_OR1K_TLS_LDO_HI16", /* name */ 438 FALSE, /* partial_inplace */ 439 0x0, /* src_mask */ 440 0xffff, /* dst_mask */ 441 FALSE), /* pcrel_offset */ 442 443 HOWTO (R_OR1K_TLS_LDO_LO16, /* type */ 444 0, /* rightshift */ 445 2, /* size (0 = byte, 1 = short, 2 = long) */ 446 16, /* bitsize */ 447 FALSE, /* pc_relative */ 448 0, /* bitpos */ 449 complain_overflow_dont, /* complain_on_overflow */ 450 bfd_elf_generic_reloc, /* special_function */ 451 "R_OR1K_TLS_LDO_LO16", /* name */ 452 FALSE, /* partial_inplace */ 453 0x0, /* src_mask */ 454 0xffff, /* dst_mask */ 455 FALSE), /* pcrel_offset */ 456 457 HOWTO (R_OR1K_TLS_IE_HI16, /* type */ 458 16, /* rightshift */ 459 2, /* size (0 = byte, 1 = short, 2 = long) */ 460 16, /* bitsize */ 461 FALSE, /* pc_relative */ 462 0, /* bitpos */ 463 complain_overflow_dont, /* complain_on_overflow */ 464 bfd_elf_generic_reloc, /* special_function */ 465 "R_OR1K_TLS_IE_HI16", /* name */ 466 FALSE, /* partial_inplace */ 467 0x0, /* src_mask */ 468 0xffff, /* dst_mask */ 469 FALSE), /* pcrel_offset */ 470 471 HOWTO (R_OR1K_TLS_IE_LO16, /* type */ 472 0, /* rightshift */ 473 2, /* size (0 = byte, 1 = short, 2 = long) */ 474 16, /* bitsize */ 475 FALSE, /* pc_relative */ 476 0, /* bitpos */ 477 complain_overflow_dont, /* complain_on_overflow */ 478 bfd_elf_generic_reloc, /* special_function */ 479 "R_OR1K_TLS_IE_LO16", /* name */ 480 FALSE, /* partial_inplace */ 481 0x0, /* src_mask */ 482 0xffff, /* dst_mask */ 483 FALSE), /* pcrel_offset */ 484 485 HOWTO (R_OR1K_TLS_LE_HI16, /* type */ 486 16, /* rightshift */ 487 2, /* size (0 = byte, 1 = short, 2 = long) */ 488 16, /* bitsize */ 489 FALSE, /* pc_relative */ 490 0, /* bitpos */ 491 complain_overflow_dont, /* complain_on_overflow */ 492 bfd_elf_generic_reloc, /* special_function */ 493 "R_OR1K_TLS_LE_HI16", /* name */ 494 FALSE, /* partial_inplace */ 495 0x0, /* src_mask */ 496 0xffff, /* dst_mask */ 497 FALSE), /* pcrel_offset */ 498 499 HOWTO (R_OR1K_TLS_LE_LO16, /* type */ 500 0, /* rightshift */ 501 2, /* size (0 = byte, 1 = short, 2 = long) */ 502 16, /* bitsize */ 503 FALSE, /* pc_relative */ 504 0, /* bitpos */ 505 complain_overflow_dont, /* complain_on_overflow */ 506 bfd_elf_generic_reloc, /* special_function */ 507 "R_OR1K_TLS_LE_LO16", /* name */ 508 FALSE, /* partial_inplace */ 509 0x0, /* src_mask */ 510 0xffff, /* dst_mask */ 511 FALSE), /* pcrel_offset */ 512 513 }; 514 515 /* Map BFD reloc types to Or1k ELF reloc types. */ 516 517 struct or1k_reloc_map 518 { 519 bfd_reloc_code_real_type bfd_reloc_val; 520 unsigned int or1k_reloc_val; 521 }; 522 523 static const struct or1k_reloc_map or1k_reloc_map[] = 524 { 525 { BFD_RELOC_NONE, R_OR1K_NONE }, 526 { BFD_RELOC_32, R_OR1K_32 }, 527 { BFD_RELOC_16, R_OR1K_16 }, 528 { BFD_RELOC_8, R_OR1K_8 }, 529 { BFD_RELOC_LO16, R_OR1K_LO_16_IN_INSN }, 530 { BFD_RELOC_HI16, R_OR1K_HI_16_IN_INSN }, 531 { BFD_RELOC_OR1K_REL_26, R_OR1K_INSN_REL_26 }, 532 { BFD_RELOC_VTABLE_ENTRY, R_OR1K_GNU_VTENTRY }, 533 { BFD_RELOC_VTABLE_INHERIT, R_OR1K_GNU_VTINHERIT }, 534 { BFD_RELOC_32_PCREL, R_OR1K_32_PCREL }, 535 { BFD_RELOC_16_PCREL, R_OR1K_16_PCREL }, 536 { BFD_RELOC_8_PCREL, R_OR1K_8_PCREL }, 537 { BFD_RELOC_OR1K_GOTPC_HI16, R_OR1K_GOTPC_HI16 }, 538 { BFD_RELOC_OR1K_GOTPC_LO16, R_OR1K_GOTPC_LO16 }, 539 { BFD_RELOC_OR1K_GOT16, R_OR1K_GOT16 }, 540 { BFD_RELOC_OR1K_PLT26, R_OR1K_PLT26 }, 541 { BFD_RELOC_OR1K_GOTOFF_HI16, R_OR1K_GOTOFF_HI16 }, 542 { BFD_RELOC_OR1K_GOTOFF_LO16, R_OR1K_GOTOFF_LO16 }, 543 { BFD_RELOC_OR1K_GLOB_DAT, R_OR1K_GLOB_DAT }, 544 { BFD_RELOC_OR1K_COPY, R_OR1K_COPY }, 545 { BFD_RELOC_OR1K_JMP_SLOT, R_OR1K_JMP_SLOT }, 546 { BFD_RELOC_OR1K_RELATIVE, R_OR1K_RELATIVE }, 547 { BFD_RELOC_OR1K_TLS_GD_HI16, R_OR1K_TLS_GD_HI16 }, 548 { BFD_RELOC_OR1K_TLS_GD_LO16, R_OR1K_TLS_GD_LO16 }, 549 { BFD_RELOC_OR1K_TLS_LDM_HI16, R_OR1K_TLS_LDM_HI16 }, 550 { BFD_RELOC_OR1K_TLS_LDM_LO16, R_OR1K_TLS_LDM_LO16 }, 551 { BFD_RELOC_OR1K_TLS_LDO_HI16, R_OR1K_TLS_LDO_HI16 }, 552 { BFD_RELOC_OR1K_TLS_LDO_LO16, R_OR1K_TLS_LDO_LO16 }, 553 { BFD_RELOC_OR1K_TLS_IE_HI16, R_OR1K_TLS_IE_HI16 }, 554 { BFD_RELOC_OR1K_TLS_IE_LO16, R_OR1K_TLS_IE_LO16 }, 555 { BFD_RELOC_OR1K_TLS_LE_HI16, R_OR1K_TLS_LE_HI16 }, 556 { BFD_RELOC_OR1K_TLS_LE_LO16, R_OR1K_TLS_LE_LO16 }, 557 }; 558 559 /* The linker needs to keep track of the number of relocs that it 560 decides to copy as dynamic relocs in check_relocs for each symbol. 561 This is so that it can later discard them if they are found to be 562 unnecessary. We store the information in a field extending the 563 regular ELF linker hash table. */ 564 565 struct elf_or1k_dyn_relocs 566 { 567 struct elf_or1k_dyn_relocs *next; 568 569 /* The input section of the reloc. */ 570 asection *sec; 571 572 /* Total number of relocs copied for the input section. */ 573 bfd_size_type count; 574 575 /* Number of pc-relative relocs copied for the input section. */ 576 bfd_size_type pc_count; 577 }; 578 579 #define TLS_UNKNOWN 0 580 #define TLS_NONE 1 581 #define TLS_GD 2 582 #define TLS_LD 3 583 #define TLS_IE 4 584 #define TLS_LE 5 585 586 /* ELF linker hash entry. */ 587 struct elf_or1k_link_hash_entry 588 { 589 struct elf_link_hash_entry root; 590 591 /* Track dynamic relocs copied for this symbol. */ 592 struct elf_or1k_dyn_relocs *dyn_relocs; 593 594 /* Track type of TLS access. */ 595 unsigned char tls_type; 596 }; 597 598 /* ELF object data. */ 599 struct elf_or1k_obj_tdata 600 { 601 struct elf_obj_tdata root; 602 603 /* tls_type for each local got entry. */ 604 unsigned char *local_tls_type; 605 }; 606 607 #define elf_or1k_tdata(abfd) \ 608 ((struct elf_or1k_obj_tdata *) (abfd)->tdata.any) 609 610 #define elf_or1k_local_tls_type(abfd) \ 611 (elf_or1k_tdata (abfd)->local_tls_type) 612 613 /* ELF linker hash table. */ 614 struct elf_or1k_link_hash_table 615 { 616 struct elf_link_hash_table root; 617 618 /* Short-cuts to get to dynamic linker sections. */ 619 asection *sgot; 620 asection *sgotplt; 621 asection *srelgot; 622 asection *splt; 623 asection *srelplt; 624 asection *sdynbss; 625 asection *srelbss; 626 627 /* Small local sym to section mapping cache. */ 628 struct sym_cache sym_sec; 629 }; 630 631 /* Get the ELF linker hash table from a link_info structure. */ 632 #define or1k_elf_hash_table(p) \ 633 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 634 == OR1K_ELF_DATA ? ((struct elf_or1k_link_hash_table *) ((p)->hash)) : NULL) 635 636 static bfd_boolean 637 elf_or1k_mkobject (bfd *abfd) 638 { 639 return bfd_elf_allocate_object (abfd, sizeof (struct elf_or1k_obj_tdata), 640 OR1K_ELF_DATA); 641 } 642 643 /* Create an entry in an or1k ELF linker hash table. */ 644 645 static struct bfd_hash_entry * 646 or1k_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 647 struct bfd_hash_table *table, 648 const char *string) 649 { 650 struct elf_or1k_link_hash_entry *ret = 651 (struct elf_or1k_link_hash_entry *) entry; 652 653 /* Allocate the structure if it has not already been allocated by a 654 subclass. */ 655 if (ret == NULL) 656 ret = bfd_hash_allocate (table, 657 sizeof (struct elf_or1k_link_hash_entry)); 658 if (ret == NULL) 659 return NULL; 660 661 /* Call the allocation method of the superclass. */ 662 ret = ((struct elf_or1k_link_hash_entry *) 663 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 664 table, string)); 665 if (ret != NULL) 666 { 667 struct elf_or1k_link_hash_entry *eh; 668 669 eh = (struct elf_or1k_link_hash_entry *) ret; 670 eh->dyn_relocs = NULL; 671 eh->tls_type = TLS_UNKNOWN; 672 } 673 674 return (struct bfd_hash_entry *) ret; 675 } 676 677 /* Create an or1k ELF linker hash table. */ 678 679 static struct bfd_link_hash_table * 680 or1k_elf_link_hash_table_create (bfd *abfd) 681 { 682 struct elf_or1k_link_hash_table *ret; 683 bfd_size_type amt = sizeof (struct elf_or1k_link_hash_table); 684 685 ret = bfd_zmalloc (amt); 686 if (ret == NULL) 687 return NULL; 688 689 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, 690 or1k_elf_link_hash_newfunc, 691 sizeof (struct elf_or1k_link_hash_entry), 692 OR1K_ELF_DATA)) 693 { 694 free (ret); 695 return NULL; 696 } 697 698 return &ret->root.root; 699 } 700 701 static reloc_howto_type * 702 or1k_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, 703 bfd_reloc_code_real_type code) 704 { 705 unsigned int i; 706 707 for (i = ARRAY_SIZE (or1k_reloc_map); --i;) 708 if (or1k_reloc_map[i].bfd_reloc_val == code) 709 return & or1k_elf_howto_table[or1k_reloc_map[i].or1k_reloc_val]; 710 711 return NULL; 712 } 713 714 static reloc_howto_type * 715 or1k_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 716 const char *r_name) 717 { 718 unsigned int i; 719 720 for (i = 0; 721 i < (sizeof (or1k_elf_howto_table) 722 / sizeof (or1k_elf_howto_table[0])); 723 i++) 724 if (or1k_elf_howto_table[i].name != NULL 725 && strcasecmp (or1k_elf_howto_table[i].name, r_name) == 0) 726 return &or1k_elf_howto_table[i]; 727 728 return NULL; 729 } 730 731 /* Set the howto pointer for an Or1k ELF reloc. */ 732 733 static void 734 or1k_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED, 735 arelent * cache_ptr, 736 Elf_Internal_Rela * dst) 737 { 738 unsigned int r_type; 739 740 r_type = ELF32_R_TYPE (dst->r_info); 741 BFD_ASSERT (r_type < (unsigned int) R_OR1K_max); 742 cache_ptr->howto = & or1k_elf_howto_table[r_type]; 743 } 744 745 746 /* Return the relocation value for @tpoff relocations.. */ 747 static bfd_vma 748 tpoff (struct bfd_link_info *info, bfd_vma address) 749 { 750 /* If tls_sec is NULL, we should have signalled an error already. */ 751 if (elf_hash_table (info)->tls_sec == NULL) 752 return 0; 753 754 /* The thread pointer on or1k stores the address after the TCB where 755 the data is, just compute the difference. No need to compensate 756 for the size of TCB. */ 757 return (address - elf_hash_table (info)->tls_sec->vma); 758 } 759 760 /* Relocate an Or1k ELF section. 761 762 The RELOCATE_SECTION function is called by the new ELF backend linker 763 to handle the relocations for a section. 764 765 The relocs are always passed as Rela structures; if the section 766 actually uses Rel structures, the r_addend field will always be 767 zero. 768 769 This function is responsible for adjusting the section contents as 770 necessary, and (if using Rela relocs and generating a relocatable 771 output file) adjusting the reloc addend as necessary. 772 773 This function does not have to worry about setting the reloc 774 address or the reloc symbol index. 775 776 LOCAL_SYMS is a pointer to the swapped in local symbols. 777 778 LOCAL_SECTIONS is an array giving the section in the input file 779 corresponding to the st_shndx field of each local symbol. 780 781 The global hash table entry for the global symbols can be found 782 via elf_sym_hashes (input_bfd). 783 784 When generating relocatable output, this function must handle 785 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 786 going to be the section symbol corresponding to the output 787 section, which means that the addend must be adjusted 788 accordingly. */ 789 790 static bfd_boolean 791 or1k_elf_relocate_section (bfd *output_bfd, 792 struct bfd_link_info *info, 793 bfd *input_bfd, 794 asection *input_section, 795 bfd_byte *contents, 796 Elf_Internal_Rela *relocs, 797 Elf_Internal_Sym *local_syms, 798 asection **local_sections) 799 { 800 Elf_Internal_Shdr *symtab_hdr; 801 struct elf_link_hash_entry **sym_hashes; 802 Elf_Internal_Rela *rel; 803 Elf_Internal_Rela *relend; 804 struct elf_or1k_link_hash_table *htab = or1k_elf_hash_table (info); 805 bfd *dynobj; 806 asection *sreloc; 807 bfd_vma *local_got_offsets; 808 asection *sgot; 809 810 if (htab == NULL) 811 return FALSE; 812 813 dynobj = htab->root.dynobj; 814 local_got_offsets = elf_local_got_offsets (input_bfd); 815 816 sreloc = elf_section_data (input_section)->sreloc; 817 818 sgot = htab->sgot; 819 820 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 821 sym_hashes = elf_sym_hashes (input_bfd); 822 relend = relocs + input_section->reloc_count; 823 824 for (rel = relocs; rel < relend; rel++) 825 { 826 reloc_howto_type *howto; 827 unsigned long r_symndx; 828 Elf_Internal_Sym *sym; 829 asection *sec; 830 struct elf_link_hash_entry *h; 831 bfd_vma relocation; 832 bfd_reloc_status_type r; 833 const char *name = NULL; 834 int r_type; 835 836 r_type = ELF32_R_TYPE (rel->r_info); 837 r_symndx = ELF32_R_SYM (rel->r_info); 838 839 if (r_type == R_OR1K_GNU_VTINHERIT 840 || r_type == R_OR1K_GNU_VTENTRY) 841 continue; 842 843 if (r_type < 0 || r_type >= (int) R_OR1K_max) 844 { 845 bfd_set_error (bfd_error_bad_value); 846 return FALSE; 847 } 848 849 howto = or1k_elf_howto_table + ELF32_R_TYPE (rel->r_info); 850 h = NULL; 851 sym = NULL; 852 sec = NULL; 853 854 if (r_symndx < symtab_hdr->sh_info) 855 { 856 sym = local_syms + r_symndx; 857 sec = local_sections[r_symndx]; 858 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 859 860 name = bfd_elf_string_from_elf_section 861 (input_bfd, symtab_hdr->sh_link, sym->st_name); 862 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; 863 } 864 else 865 { 866 bfd_boolean unresolved_reloc, warned, ignored; 867 868 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 869 r_symndx, symtab_hdr, sym_hashes, 870 h, sec, relocation, 871 unresolved_reloc, warned, ignored); 872 } 873 874 if (sec != NULL && discarded_section (sec)) 875 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 876 rel, 1, relend, howto, 0, contents); 877 878 if (info->relocatable) 879 continue; 880 881 switch (howto->type) 882 { 883 case R_OR1K_PLT26: 884 { 885 if (htab->splt != NULL && h != NULL 886 && h->plt.offset != (bfd_vma) -1) 887 { 888 relocation = (htab->splt->output_section->vma 889 + htab->splt->output_offset 890 + h->plt.offset); 891 } 892 break; 893 } 894 895 case R_OR1K_GOT16: 896 /* Relocation is to the entry for this symbol in the global 897 offset table. */ 898 BFD_ASSERT (sgot != NULL); 899 if (h != NULL) 900 { 901 bfd_boolean dyn; 902 bfd_vma off; 903 904 off = h->got.offset; 905 BFD_ASSERT (off != (bfd_vma) -1); 906 907 dyn = htab->root.dynamic_sections_created; 908 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 909 || (info->shared 910 && SYMBOL_REFERENCES_LOCAL (info, h))) 911 { 912 /* This is actually a static link, or it is a 913 -Bsymbolic link and the symbol is defined 914 locally, or the symbol was forced to be local 915 because of a version file. We must initialize 916 this entry in the global offset table. Since the 917 offset must always be a multiple of 4, we use the 918 least significant bit to record whether we have 919 initialized it already. 920 921 When doing a dynamic link, we create a .rela.got 922 relocation entry to initialize the value. This 923 is done in the finish_dynamic_symbol routine. */ 924 if ((off & 1) != 0) 925 off &= ~1; 926 else 927 { 928 /* Write entry in GOT. */ 929 bfd_put_32 (output_bfd, relocation, 930 sgot->contents + off); 931 /* Mark GOT entry as having been written. */ 932 h->got.offset |= 1; 933 } 934 } 935 936 relocation = sgot->output_offset + off; 937 } 938 else 939 { 940 bfd_vma off; 941 bfd_byte *loc; 942 943 BFD_ASSERT (local_got_offsets != NULL 944 && local_got_offsets[r_symndx] != (bfd_vma) -1); 945 946 /* Get offset into GOT table. */ 947 off = local_got_offsets[r_symndx]; 948 949 /* The offset must always be a multiple of 4. We use 950 the least significant bit to record whether we have 951 already processed this entry. */ 952 if ((off & 1) != 0) 953 off &= ~1; 954 else 955 { 956 /* Write entry in GOT. */ 957 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 958 if (info->shared) 959 { 960 asection *srelgot; 961 Elf_Internal_Rela outrel; 962 963 /* We need to generate a R_OR1K_RELATIVE reloc 964 for the dynamic linker. */ 965 srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); 966 BFD_ASSERT (srelgot != NULL); 967 968 outrel.r_offset = (sgot->output_section->vma 969 + sgot->output_offset 970 + off); 971 outrel.r_info = ELF32_R_INFO (0, R_OR1K_RELATIVE); 972 outrel.r_addend = relocation; 973 loc = srelgot->contents; 974 loc += srelgot->reloc_count * sizeof (Elf32_External_Rela); 975 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); 976 ++srelgot->reloc_count; 977 } 978 979 local_got_offsets[r_symndx] |= 1; 980 } 981 relocation = sgot->output_offset + off; 982 } 983 984 /* Addend should be zero. */ 985 if (rel->r_addend != 0) 986 (*_bfd_error_handler) 987 (_("internal error: addend should be zero for R_OR1K_GOT16")); 988 989 break; 990 991 case R_OR1K_GOTOFF_LO16: 992 case R_OR1K_GOTOFF_HI16: 993 /* Relocation is offset from GOT. */ 994 BFD_ASSERT (sgot != NULL); 995 relocation -= sgot->output_section->vma; 996 break; 997 998 case R_OR1K_INSN_REL_26: 999 case R_OR1K_HI_16_IN_INSN: 1000 case R_OR1K_LO_16_IN_INSN: 1001 case R_OR1K_32: 1002 /* R_OR1K_16? */ 1003 { 1004 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols 1005 from removed linkonce sections, or sections discarded by 1006 a linker script. */ 1007 if (r_symndx == STN_UNDEF 1008 || (input_section->flags & SEC_ALLOC) == 0) 1009 break; 1010 1011 if ((info->shared 1012 && (h == NULL 1013 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1014 || h->root.type != bfd_link_hash_undefweak) 1015 && (howto->type != R_OR1K_INSN_REL_26 1016 || !SYMBOL_CALLS_LOCAL (info, h))) 1017 || (!info->shared 1018 && h != NULL 1019 && h->dynindx != -1 1020 && !h->non_got_ref 1021 && ((h->def_dynamic 1022 && !h->def_regular) 1023 || h->root.type == bfd_link_hash_undefweak 1024 || h->root.type == bfd_link_hash_undefined))) 1025 { 1026 Elf_Internal_Rela outrel; 1027 bfd_byte *loc; 1028 bfd_boolean skip; 1029 1030 /* When generating a shared object, these relocations 1031 are copied into the output file to be resolved at run 1032 time. */ 1033 1034 BFD_ASSERT (sreloc != NULL); 1035 1036 skip = FALSE; 1037 1038 outrel.r_offset = 1039 _bfd_elf_section_offset (output_bfd, info, input_section, 1040 rel->r_offset); 1041 if (outrel.r_offset == (bfd_vma) -1) 1042 skip = TRUE; 1043 else if (outrel.r_offset == (bfd_vma) -2) 1044 skip = TRUE; 1045 outrel.r_offset += (input_section->output_section->vma 1046 + input_section->output_offset); 1047 1048 if (skip) 1049 memset (&outrel, 0, sizeof outrel); 1050 /* h->dynindx may be -1 if the symbol was marked to 1051 become local. */ 1052 else if (h != NULL 1053 && ((! info->symbolic && h->dynindx != -1) 1054 || !h->def_regular)) 1055 { 1056 BFD_ASSERT (h->dynindx != -1); 1057 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 1058 outrel.r_addend = rel->r_addend; 1059 } 1060 else 1061 { 1062 if (r_type == R_OR1K_32) 1063 { 1064 outrel.r_info = ELF32_R_INFO (0, R_OR1K_RELATIVE); 1065 outrel.r_addend = relocation + rel->r_addend; 1066 } 1067 else 1068 { 1069 BFD_FAIL (); 1070 (*_bfd_error_handler) 1071 (_("%B: probably compiled without -fPIC?"), 1072 input_bfd); 1073 bfd_set_error (bfd_error_bad_value); 1074 return FALSE; 1075 } 1076 } 1077 1078 loc = sreloc->contents; 1079 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 1080 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1081 break; 1082 } 1083 break; 1084 } 1085 1086 case R_OR1K_TLS_LDM_HI16: 1087 case R_OR1K_TLS_LDM_LO16: 1088 case R_OR1K_TLS_LDO_HI16: 1089 case R_OR1K_TLS_LDO_LO16: 1090 /* TODO: implement support for local dynamic. */ 1091 BFD_FAIL (); 1092 (*_bfd_error_handler) 1093 (_("%B: support for local dynamic not implemented"), 1094 input_bfd); 1095 bfd_set_error (bfd_error_bad_value); 1096 return FALSE; 1097 1098 1099 case R_OR1K_TLS_GD_HI16: 1100 case R_OR1K_TLS_GD_LO16: 1101 case R_OR1K_TLS_IE_HI16: 1102 case R_OR1K_TLS_IE_LO16: 1103 { 1104 bfd_vma gotoff; 1105 Elf_Internal_Rela rela; 1106 bfd_byte *loc; 1107 int dynamic; 1108 1109 sreloc = bfd_get_section_by_name (dynobj, ".rela.got"); 1110 1111 /* Mark as TLS related GOT entry by setting 1112 bit 2 as well as bit 1. */ 1113 if (h != NULL) 1114 { 1115 gotoff = h->got.offset; 1116 h->got.offset |= 3; 1117 } 1118 else 1119 { 1120 gotoff = local_got_offsets[r_symndx]; 1121 local_got_offsets[r_symndx] |= 3; 1122 } 1123 1124 /* Only process the relocation once. */ 1125 if (gotoff & 1) 1126 { 1127 relocation = sgot->output_offset + (gotoff & ~3); 1128 break; 1129 } 1130 1131 BFD_ASSERT (elf_hash_table (info)->hgot == NULL 1132 || elf_hash_table (info)->hgot->root.u.def.value == 0); 1133 1134 /* Dynamic entries will require relocations. if we do not need 1135 them we will just use the default R_OR1K_NONE and 1136 not set anything. */ 1137 dynamic = info->shared 1138 || (sec && (sec->flags & SEC_ALLOC) != 0 1139 && h != NULL 1140 && (h->root.type == bfd_link_hash_defweak || !h->def_regular)); 1141 1142 /* Shared GD. */ 1143 if (dynamic && (howto->type == R_OR1K_TLS_GD_HI16 1144 || howto->type == R_OR1K_TLS_GD_LO16)) 1145 { 1146 int i; 1147 1148 /* Add DTPMOD and DTPOFF GOT and rela entries. */ 1149 for (i = 0; i < 2; ++i) 1150 { 1151 rela.r_offset = sgot->output_section->vma + 1152 sgot->output_offset + gotoff + i*4; 1153 if (h != NULL && h->dynindx != -1) 1154 { 1155 rela.r_info = ELF32_R_INFO (h->dynindx, 1156 (i == 0 ? R_OR1K_TLS_DTPMOD : R_OR1K_TLS_DTPOFF)); 1157 rela.r_addend = 0; 1158 } 1159 else 1160 { 1161 rela.r_info = ELF32_R_INFO (0, 1162 (i == 0 ? R_OR1K_TLS_DTPMOD : R_OR1K_TLS_DTPOFF)); 1163 rela.r_addend = tpoff (info, relocation); 1164 } 1165 1166 loc = sreloc->contents; 1167 loc += sreloc->reloc_count++ * 1168 sizeof (Elf32_External_Rela); 1169 1170 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1171 bfd_put_32 (output_bfd, 0, sgot->contents + gotoff + i*4); 1172 } 1173 } 1174 /* Static GD. */ 1175 else if (howto->type == R_OR1K_TLS_GD_HI16 1176 || howto->type == R_OR1K_TLS_GD_LO16) 1177 { 1178 bfd_put_32 (output_bfd, 1, sgot->contents + gotoff); 1179 bfd_put_32 (output_bfd, tpoff (info, relocation), 1180 sgot->contents + gotoff + 4); 1181 } 1182 /* Shared IE. */ 1183 else if (dynamic) 1184 { 1185 /* Add TPOFF GOT and rela entries. */ 1186 rela.r_offset = sgot->output_section->vma + 1187 sgot->output_offset + gotoff; 1188 if (h != NULL && h->dynindx != -1) 1189 { 1190 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_TLS_TPOFF); 1191 rela.r_addend = 0; 1192 } 1193 else 1194 { 1195 rela.r_info = ELF32_R_INFO (0, R_OR1K_TLS_TPOFF); 1196 rela.r_addend = tpoff (info, relocation); 1197 } 1198 1199 loc = sreloc->contents; 1200 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 1201 1202 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1203 bfd_put_32 (output_bfd, 0, sgot->contents + gotoff); 1204 } 1205 /* Static IE. */ 1206 else 1207 { 1208 bfd_put_32 (output_bfd, tpoff (info, relocation), 1209 sgot->contents + gotoff); 1210 } 1211 relocation = sgot->output_offset + gotoff; 1212 break; 1213 } 1214 case R_OR1K_TLS_LE_HI16: 1215 case R_OR1K_TLS_LE_LO16: 1216 1217 /* Relocation is offset from TP. */ 1218 relocation = tpoff (info, relocation); 1219 break; 1220 1221 case R_OR1K_TLS_DTPMOD: 1222 case R_OR1K_TLS_DTPOFF: 1223 case R_OR1K_TLS_TPOFF: 1224 /* These are resolved dynamically on load and shouldn't 1225 be used as linker input. */ 1226 BFD_FAIL (); 1227 (*_bfd_error_handler) 1228 (_("%B: will not resolve runtime TLS relocation"), 1229 input_bfd); 1230 bfd_set_error (bfd_error_bad_value); 1231 return FALSE; 1232 1233 default: 1234 break; 1235 } 1236 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents, 1237 rel->r_offset, relocation, rel->r_addend); 1238 1239 if (r != bfd_reloc_ok) 1240 { 1241 const char *msg = NULL; 1242 1243 switch (r) 1244 { 1245 case bfd_reloc_overflow: 1246 r = info->callbacks->reloc_overflow 1247 (info, (h ? &h->root : NULL), name, howto->name, 1248 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 1249 break; 1250 1251 case bfd_reloc_undefined: 1252 r = info->callbacks->undefined_symbol 1253 (info, name, input_bfd, input_section, rel->r_offset, TRUE); 1254 break; 1255 1256 case bfd_reloc_outofrange: 1257 msg = _("internal error: out of range error"); 1258 break; 1259 1260 case bfd_reloc_notsupported: 1261 msg = _("internal error: unsupported relocation error"); 1262 break; 1263 1264 case bfd_reloc_dangerous: 1265 msg = _("internal error: dangerous relocation"); 1266 break; 1267 1268 default: 1269 msg = _("internal error: unknown error"); 1270 break; 1271 } 1272 1273 if (msg) 1274 r = info->callbacks->warning 1275 (info, msg, name, input_bfd, input_section, rel->r_offset); 1276 1277 if (!r) 1278 return FALSE; 1279 } 1280 } 1281 1282 return TRUE; 1283 } 1284 1285 /* Return the section that should be marked against GC for a given 1286 relocation. */ 1287 1288 static asection * 1289 or1k_elf_gc_mark_hook (asection *sec, 1290 struct bfd_link_info *info, 1291 Elf_Internal_Rela *rel, 1292 struct elf_link_hash_entry *h, 1293 Elf_Internal_Sym *sym) 1294 { 1295 if (h != NULL) 1296 switch (ELF32_R_TYPE (rel->r_info)) 1297 { 1298 case R_OR1K_GNU_VTINHERIT: 1299 case R_OR1K_GNU_VTENTRY: 1300 return NULL; 1301 } 1302 1303 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1304 } 1305 1306 static bfd_boolean 1307 or1k_elf_gc_sweep_hook (bfd *abfd, 1308 struct bfd_link_info *info ATTRIBUTE_UNUSED, 1309 asection *sec, 1310 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) 1311 { 1312 /* Update the got entry reference counts for the section being removed. */ 1313 Elf_Internal_Shdr *symtab_hdr; 1314 struct elf_link_hash_entry **sym_hashes; 1315 bfd_signed_vma *local_got_refcounts; 1316 const Elf_Internal_Rela *rel, *relend; 1317 1318 elf_section_data (sec)->local_dynrel = NULL; 1319 1320 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1321 sym_hashes = elf_sym_hashes (abfd); 1322 local_got_refcounts = elf_local_got_refcounts (abfd); 1323 1324 relend = relocs + sec->reloc_count; 1325 for (rel = relocs; rel < relend; rel++) 1326 { 1327 unsigned long r_symndx; 1328 struct elf_link_hash_entry *h = NULL; 1329 1330 r_symndx = ELF32_R_SYM (rel->r_info); 1331 if (r_symndx >= symtab_hdr->sh_info) 1332 { 1333 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1334 while (h->root.type == bfd_link_hash_indirect 1335 || h->root.type == bfd_link_hash_warning) 1336 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1337 } 1338 1339 switch (ELF32_R_TYPE (rel->r_info)) 1340 { 1341 case R_OR1K_GOT16: 1342 if (h != NULL) 1343 { 1344 if (h->got.refcount > 0) 1345 h->got.refcount--; 1346 } 1347 else 1348 { 1349 if (local_got_refcounts && local_got_refcounts[r_symndx] > 0) 1350 local_got_refcounts[r_symndx]--; 1351 } 1352 break; 1353 1354 default: 1355 break; 1356 } 1357 } 1358 return TRUE; 1359 } 1360 1361 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up 1362 shortcuts to them in our hash table. */ 1363 1364 static bfd_boolean 1365 create_got_section (bfd *dynobj, struct bfd_link_info *info) 1366 { 1367 struct elf_or1k_link_hash_table *htab; 1368 asection *s; 1369 1370 /* This function may be called more than once. */ 1371 s = bfd_get_section_by_name (dynobj, ".got"); 1372 if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0) 1373 return TRUE; 1374 1375 htab = or1k_elf_hash_table (info); 1376 if (htab == NULL) 1377 return FALSE; 1378 1379 if (! _bfd_elf_create_got_section (dynobj, info)) 1380 return FALSE; 1381 1382 htab->sgot = bfd_get_section_by_name (dynobj, ".got"); 1383 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); 1384 htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); 1385 1386 if (! htab->sgot || ! htab->sgotplt || ! htab->srelgot) 1387 abort (); 1388 1389 if (! bfd_set_section_flags (dynobj, htab->srelgot, SEC_ALLOC 1390 | SEC_LOAD 1391 | SEC_HAS_CONTENTS 1392 | SEC_IN_MEMORY 1393 | SEC_LINKER_CREATED 1394 | SEC_READONLY) 1395 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) 1396 return FALSE; 1397 1398 return TRUE; 1399 } 1400 1401 /* Look through the relocs for a section during the first phase. */ 1402 1403 static bfd_boolean 1404 or1k_elf_check_relocs (bfd *abfd, 1405 struct bfd_link_info *info, 1406 asection *sec, 1407 const Elf_Internal_Rela *relocs) 1408 { 1409 Elf_Internal_Shdr *symtab_hdr; 1410 struct elf_link_hash_entry **sym_hashes; 1411 const Elf_Internal_Rela *rel; 1412 1413 const Elf_Internal_Rela *rel_end; 1414 struct elf_or1k_link_hash_table *htab; 1415 bfd *dynobj; 1416 asection *sreloc = NULL; 1417 1418 if (info->relocatable) 1419 return TRUE; 1420 1421 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1422 sym_hashes = elf_sym_hashes (abfd); 1423 1424 htab = or1k_elf_hash_table (info); 1425 if (htab == NULL) 1426 return FALSE; 1427 1428 dynobj = htab->root.dynobj; 1429 1430 rel_end = relocs + sec->reloc_count; 1431 for (rel = relocs; rel < rel_end; rel++) 1432 { 1433 struct elf_link_hash_entry *h; 1434 unsigned long r_symndx; 1435 unsigned char tls_type; 1436 1437 r_symndx = ELF32_R_SYM (rel->r_info); 1438 if (r_symndx < symtab_hdr->sh_info) 1439 h = NULL; 1440 else 1441 { 1442 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1443 while (h->root.type == bfd_link_hash_indirect 1444 || h->root.type == bfd_link_hash_warning) 1445 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1446 1447 /* PR15323, ref flags aren't set for references in the same 1448 object. */ 1449 h->root.non_ir_ref = 1; 1450 } 1451 1452 switch (ELF32_R_TYPE (rel->r_info)) 1453 { 1454 case R_OR1K_TLS_GD_HI16: 1455 case R_OR1K_TLS_GD_LO16: 1456 tls_type = TLS_GD; 1457 break; 1458 case R_OR1K_TLS_LDM_HI16: 1459 case R_OR1K_TLS_LDM_LO16: 1460 case R_OR1K_TLS_LDO_HI16: 1461 case R_OR1K_TLS_LDO_LO16: 1462 tls_type = TLS_LD; 1463 break; 1464 case R_OR1K_TLS_IE_HI16: 1465 case R_OR1K_TLS_IE_LO16: 1466 tls_type = TLS_IE; 1467 break; 1468 case R_OR1K_TLS_LE_HI16: 1469 case R_OR1K_TLS_LE_LO16: 1470 tls_type = TLS_LE; 1471 break; 1472 default: 1473 tls_type = TLS_NONE; 1474 } 1475 1476 /* Record TLS type. */ 1477 if (h != NULL) 1478 ((struct elf_or1k_link_hash_entry *) h)->tls_type = tls_type; 1479 else 1480 { 1481 unsigned char *local_tls_type; 1482 1483 /* This is a TLS type record for a local symbol. */ 1484 local_tls_type = (unsigned char *) elf_or1k_local_tls_type (abfd); 1485 if (local_tls_type == NULL) 1486 { 1487 bfd_size_type size; 1488 1489 size = symtab_hdr->sh_info; 1490 local_tls_type = bfd_zalloc (abfd, size); 1491 if (local_tls_type == NULL) 1492 return FALSE; 1493 elf_or1k_local_tls_type (abfd) = local_tls_type; 1494 } 1495 local_tls_type[r_symndx] = tls_type; 1496 } 1497 1498 switch (ELF32_R_TYPE (rel->r_info)) 1499 { 1500 /* This relocation describes the C++ object vtable hierarchy. 1501 Reconstruct it for later use during GC. */ 1502 case R_OR1K_GNU_VTINHERIT: 1503 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1504 return FALSE; 1505 break; 1506 1507 /* This relocation describes which C++ vtable entries are actually 1508 used. Record for later use during GC. */ 1509 case R_OR1K_GNU_VTENTRY: 1510 BFD_ASSERT (h != NULL); 1511 if (h != NULL 1512 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1513 return FALSE; 1514 break; 1515 1516 /* This relocation requires .plt entry. */ 1517 case R_OR1K_PLT26: 1518 if (h != NULL) 1519 { 1520 h->needs_plt = 1; 1521 h->plt.refcount += 1; 1522 } 1523 break; 1524 1525 case R_OR1K_GOT16: 1526 case R_OR1K_GOTOFF_HI16: 1527 case R_OR1K_GOTOFF_LO16: 1528 case R_OR1K_TLS_GD_HI16: 1529 case R_OR1K_TLS_GD_LO16: 1530 case R_OR1K_TLS_IE_HI16: 1531 case R_OR1K_TLS_IE_LO16: 1532 if (htab->sgot == NULL) 1533 { 1534 if (dynobj == NULL) 1535 htab->root.dynobj = dynobj = abfd; 1536 if (! create_got_section (dynobj, info)) 1537 return FALSE; 1538 } 1539 1540 if (ELF32_R_TYPE (rel->r_info) != R_OR1K_GOTOFF_HI16 && 1541 ELF32_R_TYPE (rel->r_info) != R_OR1K_GOTOFF_LO16) 1542 { 1543 if (h != NULL) 1544 h->got.refcount += 1; 1545 else 1546 { 1547 bfd_signed_vma *local_got_refcounts; 1548 1549 /* This is a global offset table entry for a local symbol. */ 1550 local_got_refcounts = elf_local_got_refcounts (abfd); 1551 if (local_got_refcounts == NULL) 1552 { 1553 bfd_size_type size; 1554 1555 size = symtab_hdr->sh_info; 1556 size *= sizeof (bfd_signed_vma); 1557 local_got_refcounts = bfd_zalloc (abfd, size); 1558 if (local_got_refcounts == NULL) 1559 return FALSE; 1560 elf_local_got_refcounts (abfd) = local_got_refcounts; 1561 } 1562 local_got_refcounts[r_symndx] += 1; 1563 } 1564 } 1565 break; 1566 1567 case R_OR1K_INSN_REL_26: 1568 case R_OR1K_HI_16_IN_INSN: 1569 case R_OR1K_LO_16_IN_INSN: 1570 case R_OR1K_32: 1571 /* R_OR1K_16? */ 1572 { 1573 if (h != NULL && !info->shared) 1574 { 1575 /* We may need a copy reloc. */ 1576 h->non_got_ref = 1; 1577 1578 /* We may also need a .plt entry. */ 1579 h->plt.refcount += 1; 1580 if (ELF32_R_TYPE (rel->r_info) != R_OR1K_INSN_REL_26) 1581 h->pointer_equality_needed = 1; 1582 } 1583 1584 /* If we are creating a shared library, and this is a reloc 1585 against a global symbol, or a non PC relative reloc 1586 against a local symbol, then we need to copy the reloc 1587 into the shared library. However, if we are linking with 1588 -Bsymbolic, we do not need to copy a reloc against a 1589 global symbol which is defined in an object we are 1590 including in the link (i.e., DEF_REGULAR is set). At 1591 this point we have not seen all the input files, so it is 1592 possible that DEF_REGULAR is not set now but will be set 1593 later (it is never cleared). In case of a weak definition, 1594 DEF_REGULAR may be cleared later by a strong definition in 1595 a shared library. We account for that possibility below by 1596 storing information in the relocs_copied field of the hash 1597 table entry. A similar situation occurs when creating 1598 shared libraries and symbol visibility changes render the 1599 symbol local. 1600 1601 If on the other hand, we are creating an executable, we 1602 may need to keep relocations for symbols satisfied by a 1603 dynamic library if we manage to avoid copy relocs for the 1604 symbol. */ 1605 1606 if ((info->shared 1607 && (sec->flags & SEC_ALLOC) != 0 1608 && (ELF32_R_TYPE (rel->r_info) != R_OR1K_INSN_REL_26 1609 || (h != NULL 1610 && (!SYMBOLIC_BIND (info, h) 1611 || h->root.type == bfd_link_hash_defweak 1612 || !h->def_regular)))) 1613 || (!info->shared 1614 && (sec->flags & SEC_ALLOC) != 0 1615 && h != NULL 1616 && (h->root.type == bfd_link_hash_defweak 1617 || !h->def_regular))) 1618 { 1619 struct elf_or1k_dyn_relocs *p; 1620 struct elf_or1k_dyn_relocs **head; 1621 1622 /* When creating a shared object, we must copy these 1623 relocs into the output file. We create a reloc 1624 section in dynobj and make room for the reloc. */ 1625 if (sreloc == NULL) 1626 { 1627 const char *name; 1628 unsigned int strndx = elf_elfheader (abfd)->e_shstrndx; 1629 unsigned int shnam = _bfd_elf_single_rel_hdr (sec)->sh_name; 1630 1631 name = bfd_elf_string_from_elf_section (abfd, strndx, shnam); 1632 if (name == NULL) 1633 return FALSE; 1634 1635 if (strncmp (name, ".rela", 5) != 0 1636 || strcmp (bfd_get_section_name (abfd, sec), 1637 name + 5) != 0) 1638 { 1639 (*_bfd_error_handler) 1640 (_("%B: bad relocation section name `%s\'"), 1641 abfd, name); 1642 } 1643 1644 if (htab->root.dynobj == NULL) 1645 htab->root.dynobj = abfd; 1646 dynobj = htab->root.dynobj; 1647 1648 sreloc = bfd_get_section_by_name (dynobj, name); 1649 if (sreloc == NULL) 1650 { 1651 sreloc = _bfd_elf_make_dynamic_reloc_section 1652 (sec, dynobj, 2, abfd, /*rela?*/ TRUE); 1653 1654 if (sreloc == NULL) 1655 return FALSE; 1656 } 1657 elf_section_data (sec)->sreloc = sreloc; 1658 } 1659 1660 /* If this is a global symbol, we count the number of 1661 relocations we need for this symbol. */ 1662 if (h != NULL) 1663 head = &((struct elf_or1k_link_hash_entry *) h)->dyn_relocs; 1664 else 1665 { 1666 /* Track dynamic relocs needed for local syms too. 1667 We really need local syms available to do this 1668 easily. Oh well. */ 1669 1670 asection *s; 1671 Elf_Internal_Sym *isym; 1672 void *vpp; 1673 1674 isym = bfd_sym_from_r_symndx (&htab->sym_sec, 1675 abfd, r_symndx); 1676 if (isym == NULL) 1677 return FALSE; 1678 1679 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 1680 if (s == NULL) 1681 return FALSE; 1682 1683 vpp = &elf_section_data (s)->local_dynrel; 1684 head = (struct elf_or1k_dyn_relocs **) vpp; 1685 } 1686 1687 p = *head; 1688 if (p == NULL || p->sec != sec) 1689 { 1690 bfd_size_type amt = sizeof *p; 1691 p = ((struct elf_or1k_dyn_relocs *) 1692 bfd_alloc (htab->root.dynobj, amt)); 1693 if (p == NULL) 1694 return FALSE; 1695 p->next = *head; 1696 *head = p; 1697 p->sec = sec; 1698 p->count = 0; 1699 p->pc_count = 0; 1700 } 1701 1702 p->count += 1; 1703 if (ELF32_R_TYPE (rel->r_info) == R_OR1K_INSN_REL_26) 1704 p->pc_count += 1; 1705 } 1706 } 1707 break; 1708 } 1709 } 1710 1711 return TRUE; 1712 } 1713 1714 /* Finish up the dynamic sections. */ 1715 1716 static bfd_boolean 1717 or1k_elf_finish_dynamic_sections (bfd *output_bfd, 1718 struct bfd_link_info *info) 1719 { 1720 bfd *dynobj; 1721 asection *sdyn, *sgot; 1722 struct elf_or1k_link_hash_table *htab; 1723 1724 htab = or1k_elf_hash_table (info); 1725 if (htab == NULL) 1726 return FALSE; 1727 1728 dynobj = htab->root.dynobj; 1729 1730 sgot = htab->sgotplt; 1731 sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); 1732 1733 if (htab->root.dynamic_sections_created) 1734 { 1735 asection *splt; 1736 Elf32_External_Dyn *dyncon, *dynconend; 1737 1738 BFD_ASSERT (sgot != NULL && sdyn != NULL); 1739 1740 dyncon = (Elf32_External_Dyn *) sdyn->contents; 1741 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 1742 1743 for (; dyncon < dynconend; dyncon++) 1744 { 1745 Elf_Internal_Dyn dyn; 1746 asection *s; 1747 1748 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 1749 1750 switch (dyn.d_tag) 1751 { 1752 default: 1753 continue; 1754 1755 case DT_PLTGOT: 1756 s = htab->sgot->output_section; 1757 BFD_ASSERT (s != NULL); 1758 dyn.d_un.d_ptr = s->vma; 1759 break; 1760 1761 case DT_JMPREL: 1762 s = htab->srelplt->output_section; 1763 BFD_ASSERT (s != NULL); 1764 dyn.d_un.d_ptr = s->vma; 1765 break; 1766 1767 case DT_PLTRELSZ: 1768 s = htab->srelplt->output_section; 1769 BFD_ASSERT (s != NULL); 1770 dyn.d_un.d_val = s->size; 1771 break; 1772 1773 case DT_RELASZ: 1774 /* My reading of the SVR4 ABI indicates that the 1775 procedure linkage table relocs (DT_JMPREL) should be 1776 included in the overall relocs (DT_RELA). This is 1777 what Solaris does. However, UnixWare can not handle 1778 that case. Therefore, we override the DT_RELASZ entry 1779 here to make it not include the JMPREL relocs. Since 1780 the linker script arranges for .rela.plt to follow all 1781 other relocation sections, we don't have to worry 1782 about changing the DT_RELA entry. */ 1783 if (htab->srelplt != NULL) 1784 { 1785 /* FIXME: this calculation sometimes produces 1786 wrong result, the problem is that the dyn.d_un.d_val 1787 is not always correct, needs investigation why 1788 that happens. In the meantime, reading the 1789 ".rela.dyn" section by name seems to yield 1790 correct result. 1791 1792 s = htab->srelplt->output_section; 1793 dyn.d_un.d_val -= s->size; 1794 */ 1795 1796 s = bfd_get_section_by_name (output_bfd, ".rela.dyn"); 1797 dyn.d_un.d_val = s ? s->size : 0; 1798 } 1799 break; 1800 } 1801 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1802 } 1803 1804 1805 /* Fill in the first entry in the procedure linkage table. */ 1806 splt = htab->splt; 1807 if (splt && splt->size > 0) 1808 { 1809 if (info->shared) 1810 { 1811 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, 1812 splt->contents); 1813 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, 1814 splt->contents + 4); 1815 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, 1816 splt->contents + 8); 1817 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, 1818 splt->contents + 12); 1819 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, 1820 splt->contents + 16); 1821 } 1822 else 1823 { 1824 unsigned long addr; 1825 /* addr = .got + 4 */ 1826 addr = sgot->output_section->vma + sgot->output_offset + 4; 1827 bfd_put_32 (output_bfd, 1828 PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), 1829 splt->contents); 1830 bfd_put_32 (output_bfd, 1831 PLT0_ENTRY_WORD1 | (addr & 0xffff), 1832 splt->contents + 4); 1833 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); 1834 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); 1835 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); 1836 } 1837 1838 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; 1839 } 1840 } 1841 1842 /* Set the first entry in the global offset table to the address of 1843 the dynamic section. */ 1844 if (sgot && sgot->size > 0) 1845 { 1846 if (sdyn == NULL) 1847 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 1848 else 1849 bfd_put_32 (output_bfd, 1850 sdyn->output_section->vma + sdyn->output_offset, 1851 sgot->contents); 1852 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 1853 } 1854 1855 if (htab->sgot && htab->sgot->size > 0) 1856 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4; 1857 1858 return TRUE; 1859 } 1860 1861 /* Finish up dynamic symbol handling. We set the contents of various 1862 dynamic sections here. */ 1863 1864 static bfd_boolean 1865 or1k_elf_finish_dynamic_symbol (bfd *output_bfd, 1866 struct bfd_link_info *info, 1867 struct elf_link_hash_entry *h, 1868 Elf_Internal_Sym *sym) 1869 { 1870 struct elf_or1k_link_hash_table *htab; 1871 bfd_byte *loc; 1872 1873 htab = or1k_elf_hash_table (info); 1874 if (htab == NULL) 1875 return FALSE; 1876 1877 if (h->plt.offset != (bfd_vma) -1) 1878 { 1879 asection *splt; 1880 asection *sgot; 1881 asection *srela; 1882 1883 bfd_vma plt_index; 1884 bfd_vma got_offset; 1885 bfd_vma got_addr; 1886 Elf_Internal_Rela rela; 1887 1888 /* This symbol has an entry in the procedure linkage table. Set 1889 it up. */ 1890 BFD_ASSERT (h->dynindx != -1); 1891 1892 splt = htab->splt; 1893 sgot = htab->sgotplt; 1894 srela = htab->srelplt; 1895 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); 1896 1897 /* Get the index in the procedure linkage table which 1898 corresponds to this symbol. This is the index of this symbol 1899 in all the symbols for which we are making plt entries. The 1900 first entry in the procedure linkage table is reserved. */ 1901 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 1902 1903 /* Get the offset into the .got table of the entry that 1904 corresponds to this function. Each .got entry is 4 bytes. 1905 The first three are reserved. */ 1906 got_offset = (plt_index + 3) * 4; 1907 got_addr = got_offset; 1908 1909 /* Fill in the entry in the procedure linkage table. */ 1910 if (! info->shared) 1911 { 1912 got_addr += htab->sgotplt->output_section->vma 1913 + htab->sgotplt->output_offset; 1914 bfd_put_32 (output_bfd, PLT_ENTRY_WORD0 | ((got_addr >> 16) & 0xffff), 1915 splt->contents + h->plt.offset); 1916 bfd_put_32 (output_bfd, PLT_ENTRY_WORD1 | (got_addr & 0xffff), 1917 splt->contents + h->plt.offset + 4); 1918 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, 1919 splt->contents + h->plt.offset + 8); 1920 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3, 1921 splt->contents + h->plt.offset + 12); 1922 bfd_put_32 (output_bfd, PLT_ENTRY_WORD4 1923 | plt_index * sizeof (Elf32_External_Rela), 1924 splt->contents + h->plt.offset + 16); 1925 } 1926 else 1927 { 1928 bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD0 | (got_addr & 0xffff), 1929 splt->contents + h->plt.offset); 1930 bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD1 1931 | plt_index * sizeof (Elf32_External_Rela), 1932 splt->contents + h->plt.offset + 4); 1933 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2, 1934 splt->contents + h->plt.offset + 8); 1935 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3, 1936 splt->contents + h->plt.offset + 12); 1937 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4, 1938 splt->contents + h->plt.offset + 16); 1939 } 1940 1941 /* Fill in the entry in the global offset table. */ 1942 bfd_put_32 (output_bfd, 1943 (splt->output_section->vma 1944 + splt->output_offset), /* Same offset. */ 1945 sgot->contents + got_offset); 1946 1947 /* Fill in the entry in the .rela.plt section. */ 1948 rela.r_offset = (sgot->output_section->vma 1949 + sgot->output_offset 1950 + got_offset); 1951 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_JMP_SLOT); 1952 rela.r_addend = 0; 1953 loc = srela->contents; 1954 loc += plt_index * sizeof (Elf32_External_Rela); 1955 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1956 1957 if (!h->def_regular) 1958 { 1959 /* Mark the symbol as undefined, rather than as defined in 1960 the .plt section. Leave the value alone. */ 1961 sym->st_shndx = SHN_UNDEF; 1962 } 1963 1964 } 1965 1966 if (h->got.offset != (bfd_vma) -1 1967 && (h->got.offset & 2) == 0) /* Homemade TLS check. */ 1968 { 1969 asection *sgot; 1970 asection *srela; 1971 Elf_Internal_Rela rela; 1972 1973 /* This symbol has an entry in the global offset table. Set it 1974 up. */ 1975 sgot = htab->sgot; 1976 srela = htab->srelgot; 1977 BFD_ASSERT (sgot != NULL && srela != NULL); 1978 1979 rela.r_offset = (sgot->output_section->vma 1980 + sgot->output_offset 1981 + (h->got.offset &~ 1)); 1982 1983 /* If this is a -Bsymbolic link, and the symbol is defined 1984 locally, we just want to emit a RELATIVE reloc. Likewise if 1985 the symbol was forced to be local because of a version file. 1986 The entry in the global offset table will already have been 1987 initialized in the relocate_section function. */ 1988 if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h)) 1989 { 1990 rela.r_info = ELF32_R_INFO (0, R_OR1K_RELATIVE); 1991 rela.r_addend = (h->root.u.def.value 1992 + h->root.u.def.section->output_section->vma 1993 + h->root.u.def.section->output_offset); 1994 } 1995 else 1996 { 1997 BFD_ASSERT ((h->got.offset & 1) == 0); 1998 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); 1999 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_GLOB_DAT); 2000 rela.r_addend = 0; 2001 } 2002 2003 loc = srela->contents; 2004 loc += srela->reloc_count * sizeof (Elf32_External_Rela); 2005 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 2006 ++srela->reloc_count; 2007 } 2008 2009 if (h->needs_copy) 2010 { 2011 asection *s; 2012 Elf_Internal_Rela rela; 2013 2014 /* This symbols needs a copy reloc. Set it up. */ 2015 BFD_ASSERT (h->dynindx != -1 2016 && (h->root.type == bfd_link_hash_defined 2017 || h->root.type == bfd_link_hash_defweak)); 2018 2019 s = bfd_get_section_by_name (h->root.u.def.section->owner, 2020 ".rela.bss"); 2021 BFD_ASSERT (s != NULL); 2022 2023 rela.r_offset = (h->root.u.def.value 2024 + h->root.u.def.section->output_section->vma 2025 + h->root.u.def.section->output_offset); 2026 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_COPY); 2027 rela.r_addend = 0; 2028 loc = s->contents; 2029 loc += s->reloc_count * sizeof (Elf32_External_Rela); 2030 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 2031 ++s->reloc_count; 2032 } 2033 2034 /* Mark some specially defined symbols as absolute. */ 2035 if (strcmp (h->root.root.string, "_DYNAMIC") == 0 2036 || h == htab->root.hgot) 2037 sym->st_shndx = SHN_ABS; 2038 2039 return TRUE; 2040 } 2041 2042 static enum elf_reloc_type_class 2043 or1k_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 2044 const asection *rel_sec ATTRIBUTE_UNUSED, 2045 const Elf_Internal_Rela *rela) 2046 { 2047 switch ((int) ELF32_R_TYPE (rela->r_info)) 2048 { 2049 case R_OR1K_RELATIVE: return reloc_class_relative; 2050 case R_OR1K_JMP_SLOT: return reloc_class_plt; 2051 case R_OR1K_COPY: return reloc_class_copy; 2052 default: return reloc_class_normal; 2053 } 2054 } 2055 2056 /* Adjust a symbol defined by a dynamic object and referenced by a 2057 regular object. The current definition is in some section of the 2058 dynamic object, but we're not including those sections. We have to 2059 change the definition to something the rest of the link can 2060 understand. */ 2061 2062 static bfd_boolean 2063 or1k_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 2064 struct elf_link_hash_entry *h) 2065 { 2066 struct elf_or1k_link_hash_table *htab; 2067 struct elf_or1k_link_hash_entry *eh; 2068 struct elf_or1k_dyn_relocs *p; 2069 bfd *dynobj; 2070 asection *s; 2071 2072 dynobj = elf_hash_table (info)->dynobj; 2073 2074 /* Make sure we know what is going on here. */ 2075 BFD_ASSERT (dynobj != NULL 2076 && (h->needs_plt 2077 || h->u.weakdef != NULL 2078 || (h->def_dynamic 2079 && h->ref_regular 2080 && !h->def_regular))); 2081 2082 /* If this is a function, put it in the procedure linkage table. We 2083 will fill in the contents of the procedure linkage table later, 2084 when we know the address of the .got section. */ 2085 if (h->type == STT_FUNC 2086 || h->needs_plt) 2087 { 2088 if (! info->shared 2089 && !h->def_dynamic 2090 && !h->ref_dynamic 2091 && h->root.type != bfd_link_hash_undefweak 2092 && h->root.type != bfd_link_hash_undefined) 2093 { 2094 /* This case can occur if we saw a PLT reloc in an input 2095 file, but the symbol was never referred to by a dynamic 2096 object. In such a case, we don't actually need to build 2097 a procedure linkage table, and we can just do a PCREL 2098 reloc instead. */ 2099 h->plt.offset = (bfd_vma) -1; 2100 h->needs_plt = 0; 2101 } 2102 2103 return TRUE; 2104 } 2105 else 2106 h->plt.offset = (bfd_vma) -1; 2107 2108 /* If this is a weak symbol, and there is a real definition, the 2109 processor independent code will have arranged for us to see the 2110 real definition first, and we can just use the same value. */ 2111 if (h->u.weakdef != NULL) 2112 { 2113 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 2114 || h->u.weakdef->root.type == bfd_link_hash_defweak); 2115 h->root.u.def.section = h->u.weakdef->root.u.def.section; 2116 h->root.u.def.value = h->u.weakdef->root.u.def.value; 2117 return TRUE; 2118 } 2119 2120 /* This is a reference to a symbol defined by a dynamic object which 2121 is not a function. */ 2122 2123 /* If we are creating a shared library, we must presume that the 2124 only references to the symbol are via the global offset table. 2125 For such cases we need not do anything here; the relocations will 2126 be handled correctly by relocate_section. */ 2127 if (info->shared) 2128 return TRUE; 2129 2130 /* If there are no references to this symbol that do not use the 2131 GOT, we don't need to generate a copy reloc. */ 2132 if (!h->non_got_ref) 2133 return TRUE; 2134 2135 /* If -z nocopyreloc was given, we won't generate them either. */ 2136 if (info->nocopyreloc) 2137 { 2138 h->non_got_ref = 0; 2139 return TRUE; 2140 } 2141 2142 eh = (struct elf_or1k_link_hash_entry *) h; 2143 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2144 { 2145 s = p->sec->output_section; 2146 if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0) 2147 break; 2148 } 2149 2150 /* If we didn't find any dynamic relocs in sections which needs the 2151 copy reloc, then we'll be keeping the dynamic relocs and avoiding 2152 the copy reloc. */ 2153 if (p == NULL) 2154 { 2155 h->non_got_ref = 0; 2156 return TRUE; 2157 } 2158 2159 /* We must allocate the symbol in our .dynbss section, which will 2160 become part of the .bss section of the executable. There will be 2161 an entry for this symbol in the .dynsym section. The dynamic 2162 object will contain position independent code, so all references 2163 from the dynamic object to this symbol will go through the global 2164 offset table. The dynamic linker will use the .dynsym entry to 2165 determine the address it must put in the global offset table, so 2166 both the dynamic object and the regular object will refer to the 2167 same memory location for the variable. */ 2168 2169 htab = or1k_elf_hash_table (info); 2170 if (htab == NULL) 2171 return FALSE; 2172 2173 s = htab->sdynbss; 2174 BFD_ASSERT (s != NULL); 2175 2176 /* We must generate a R_OR1K_COPY reloc to tell the dynamic linker 2177 to copy the initial value out of the dynamic object and into the 2178 runtime process image. We need to remember the offset into the 2179 .rela.bss section we are going to use. */ 2180 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 2181 { 2182 asection *srel; 2183 2184 srel = htab->srelbss; 2185 BFD_ASSERT (srel != NULL); 2186 srel->size += sizeof (Elf32_External_Rela); 2187 h->needs_copy = 1; 2188 } 2189 2190 return _bfd_elf_adjust_dynamic_copy (h, s); 2191 } 2192 2193 /* Allocate space in .plt, .got and associated reloc sections for 2194 dynamic relocs. */ 2195 2196 static bfd_boolean 2197 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) 2198 { 2199 struct bfd_link_info *info; 2200 struct elf_or1k_link_hash_table *htab; 2201 struct elf_or1k_link_hash_entry *eh; 2202 struct elf_or1k_dyn_relocs *p; 2203 2204 if (h->root.type == bfd_link_hash_indirect) 2205 return TRUE; 2206 2207 info = (struct bfd_link_info *) inf; 2208 htab = or1k_elf_hash_table (info); 2209 if (htab == NULL) 2210 return FALSE; 2211 2212 eh = (struct elf_or1k_link_hash_entry *) h; 2213 2214 if (htab->root.dynamic_sections_created 2215 && h->plt.refcount > 0) 2216 { 2217 /* Make sure this symbol is output as a dynamic symbol. 2218 Undefined weak syms won't yet be marked as dynamic. */ 2219 if (h->dynindx == -1 2220 && !h->forced_local) 2221 { 2222 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2223 return FALSE; 2224 } 2225 2226 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h)) 2227 { 2228 asection *s = htab->splt; 2229 2230 /* If this is the first .plt entry, make room for the special 2231 first entry. */ 2232 if (s->size == 0) 2233 s->size = PLT_ENTRY_SIZE; 2234 2235 h->plt.offset = s->size; 2236 2237 /* If this symbol is not defined in a regular file, and we are 2238 not generating a shared library, then set the symbol to this 2239 location in the .plt. This is required to make function 2240 pointers compare as equal between the normal executable and 2241 the shared library. */ 2242 if (! info->shared 2243 && !h->def_regular) 2244 { 2245 h->root.u.def.section = s; 2246 h->root.u.def.value = h->plt.offset; 2247 } 2248 2249 /* Make room for this entry. */ 2250 s->size += PLT_ENTRY_SIZE; 2251 2252 /* We also need to make an entry in the .got.plt section, which 2253 will be placed in the .got section by the linker script. */ 2254 htab->sgotplt->size += 4; 2255 2256 /* We also need to make an entry in the .rel.plt section. */ 2257 htab->srelplt->size += sizeof (Elf32_External_Rela); 2258 } 2259 else 2260 { 2261 h->plt.offset = (bfd_vma) -1; 2262 h->needs_plt = 0; 2263 } 2264 } 2265 else 2266 { 2267 h->plt.offset = (bfd_vma) -1; 2268 h->needs_plt = 0; 2269 } 2270 2271 if (h->got.refcount > 0) 2272 { 2273 asection *s; 2274 bfd_boolean dyn; 2275 unsigned char tls_type; 2276 2277 /* Make sure this symbol is output as a dynamic symbol. 2278 Undefined weak syms won't yet be marked as dynamic. */ 2279 if (h->dynindx == -1 2280 && !h->forced_local) 2281 { 2282 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2283 return FALSE; 2284 } 2285 2286 s = htab->sgot; 2287 2288 h->got.offset = s->size; 2289 2290 tls_type = ((struct elf_or1k_link_hash_entry *) h)->tls_type; 2291 2292 /* TLS GD requires two GOT and two relocs. */ 2293 if (tls_type == TLS_GD) 2294 s->size += 8; 2295 else 2296 s->size += 4; 2297 dyn = htab->root.dynamic_sections_created; 2298 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)) 2299 { 2300 if (tls_type == TLS_GD) 2301 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela); 2302 else 2303 htab->srelgot->size += sizeof (Elf32_External_Rela); 2304 } 2305 } 2306 else 2307 h->got.offset = (bfd_vma) -1; 2308 2309 if (eh->dyn_relocs == NULL) 2310 return TRUE; 2311 2312 /* In the shared -Bsymbolic case, discard space allocated for 2313 dynamic pc-relative relocs against symbols which turn out to be 2314 defined in regular objects. For the normal shared case, discard 2315 space for pc-relative relocs that have become local due to symbol 2316 visibility changes. */ 2317 2318 if (info->shared) 2319 { 2320 if (SYMBOL_CALLS_LOCAL (info, h)) 2321 { 2322 struct elf_or1k_dyn_relocs **pp; 2323 2324 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;) 2325 { 2326 p->count -= p->pc_count; 2327 p->pc_count = 0; 2328 if (p->count == 0) 2329 *pp = p->next; 2330 else 2331 pp = &p->next; 2332 } 2333 } 2334 2335 /* Also discard relocs on undefined weak syms with non-default 2336 visibility. */ 2337 if (eh->dyn_relocs != NULL 2338 && h->root.type == bfd_link_hash_undefweak) 2339 { 2340 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 2341 eh->dyn_relocs = NULL; 2342 2343 /* Make sure undefined weak symbols are output as a dynamic 2344 symbol in PIEs. */ 2345 else if (h->dynindx == -1 2346 && !h->forced_local) 2347 { 2348 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2349 return FALSE; 2350 } 2351 } 2352 } 2353 else 2354 { 2355 /* For the non-shared case, discard space for relocs against 2356 symbols which turn out to need copy relocs or are not 2357 dynamic. */ 2358 2359 if (!h->non_got_ref 2360 && ((h->def_dynamic 2361 && !h->def_regular) 2362 || (htab->root.dynamic_sections_created 2363 && (h->root.type == bfd_link_hash_undefweak 2364 || h->root.type == bfd_link_hash_undefined)))) 2365 { 2366 /* Make sure this symbol is output as a dynamic symbol. 2367 Undefined weak syms won't yet be marked as dynamic. */ 2368 if (h->dynindx == -1 2369 && !h->forced_local) 2370 { 2371 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2372 return FALSE; 2373 } 2374 2375 /* If that succeeded, we know we'll be keeping all the 2376 relocs. */ 2377 if (h->dynindx != -1) 2378 goto keep; 2379 } 2380 2381 eh->dyn_relocs = NULL; 2382 2383 keep: ; 2384 } 2385 2386 /* Finally, allocate space. */ 2387 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2388 { 2389 asection *sreloc = elf_section_data (p->sec)->sreloc; 2390 sreloc->size += p->count * sizeof (Elf32_External_Rela); 2391 } 2392 2393 return TRUE; 2394 } 2395 2396 /* Find any dynamic relocs that apply to read-only sections. */ 2397 2398 static bfd_boolean 2399 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) 2400 { 2401 struct elf_or1k_link_hash_entry *eh; 2402 struct elf_or1k_dyn_relocs *p; 2403 2404 eh = (struct elf_or1k_link_hash_entry *) h; 2405 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2406 { 2407 asection *s = p->sec->output_section; 2408 2409 if (s != NULL && (s->flags & SEC_READONLY) != 0) 2410 { 2411 struct bfd_link_info *info = (struct bfd_link_info *) inf; 2412 2413 info->flags |= DF_TEXTREL; 2414 2415 /* Not an error, just cut short the traversal. */ 2416 return FALSE; 2417 } 2418 } 2419 return TRUE; 2420 } 2421 2422 /* Set the sizes of the dynamic sections. */ 2423 2424 static bfd_boolean 2425 or1k_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 2426 struct bfd_link_info *info) 2427 { 2428 struct elf_or1k_link_hash_table *htab; 2429 bfd *dynobj; 2430 asection *s; 2431 bfd_boolean relocs; 2432 bfd *ibfd; 2433 2434 htab = or1k_elf_hash_table (info); 2435 if (htab == NULL) 2436 return FALSE; 2437 2438 dynobj = htab->root.dynobj; 2439 BFD_ASSERT (dynobj != NULL); 2440 2441 if (htab->root.dynamic_sections_created) 2442 { 2443 /* Set the contents of the .interp section to the interpreter. */ 2444 if (info->executable) 2445 { 2446 s = bfd_get_section_by_name (dynobj, ".interp"); 2447 BFD_ASSERT (s != NULL); 2448 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 2449 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 2450 } 2451 } 2452 2453 /* Set up .got offsets for local syms, and space for local dynamic 2454 relocs. */ 2455 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 2456 { 2457 bfd_signed_vma *local_got; 2458 bfd_signed_vma *end_local_got; 2459 bfd_size_type locsymcount; 2460 Elf_Internal_Shdr *symtab_hdr; 2461 unsigned char *local_tls_type; 2462 asection *srel; 2463 2464 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 2465 continue; 2466 2467 for (s = ibfd->sections; s != NULL; s = s->next) 2468 { 2469 struct elf_or1k_dyn_relocs *p; 2470 2471 for (p = ((struct elf_or1k_dyn_relocs *) 2472 elf_section_data (s)->local_dynrel); 2473 p != NULL; 2474 p = p->next) 2475 { 2476 if (! bfd_is_abs_section (p->sec) 2477 && bfd_is_abs_section (p->sec->output_section)) 2478 { 2479 /* Input section has been discarded, either because 2480 it is a copy of a linkonce section or due to 2481 linker script /DISCARD/, so we'll be discarding 2482 the relocs too. */ 2483 } 2484 else if (p->count != 0) 2485 { 2486 srel = elf_section_data (p->sec)->sreloc; 2487 srel->size += p->count * sizeof (Elf32_External_Rela); 2488 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2489 info->flags |= DF_TEXTREL; 2490 } 2491 } 2492 } 2493 2494 local_got = elf_local_got_refcounts (ibfd); 2495 if (!local_got) 2496 continue; 2497 2498 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2499 locsymcount = symtab_hdr->sh_info; 2500 end_local_got = local_got + locsymcount; 2501 s = htab->sgot; 2502 srel = htab->srelgot; 2503 local_tls_type = (unsigned char *) elf_or1k_local_tls_type (ibfd); 2504 for (; local_got < end_local_got; ++local_got) 2505 { 2506 if (*local_got > 0) 2507 { 2508 *local_got = s->size; 2509 2510 /* TLS GD requires two GOT and two relocs. */ 2511 if (local_tls_type != NULL && *local_tls_type == TLS_GD) 2512 s->size += 8; 2513 else 2514 s->size += 4; 2515 if (info->shared) 2516 { 2517 if (local_tls_type != NULL && *local_tls_type == TLS_GD) 2518 srel->size += 2 * sizeof (Elf32_External_Rela); 2519 else 2520 srel->size += sizeof (Elf32_External_Rela); 2521 } 2522 } 2523 else 2524 2525 *local_got = (bfd_vma) -1; 2526 2527 if (local_tls_type) 2528 ++local_tls_type; 2529 } 2530 } 2531 2532 /* Allocate global sym .plt and .got entries, and space for global 2533 sym dynamic relocs. */ 2534 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info); 2535 2536 /* We now have determined the sizes of the various dynamic sections. 2537 Allocate memory for them. */ 2538 relocs = FALSE; 2539 for (s = dynobj->sections; s != NULL; s = s->next) 2540 { 2541 if ((s->flags & SEC_LINKER_CREATED) == 0) 2542 continue; 2543 2544 if (s == htab->splt 2545 || s == htab->sgot 2546 || s == htab->sgotplt 2547 || s == htab->sdynbss) 2548 { 2549 /* Strip this section if we don't need it; see the 2550 comment below. */ 2551 } 2552 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) 2553 { 2554 if (s->size != 0 && s != htab->srelplt) 2555 relocs = TRUE; 2556 2557 /* We use the reloc_count field as a counter if we need 2558 to copy relocs into the output file. */ 2559 s->reloc_count = 0; 2560 } 2561 else 2562 /* It's not one of our sections, so don't allocate space. */ 2563 continue; 2564 2565 if (s->size == 0) 2566 { 2567 /* If we don't need this section, strip it from the 2568 output file. This is mostly to handle .rela.bss and 2569 .rela.plt. We must create both sections in 2570 create_dynamic_sections, because they must be created 2571 before the linker maps input sections to output 2572 sections. The linker does that before 2573 adjust_dynamic_symbol is called, and it is that 2574 function which decides whether anything needs to go 2575 into these sections. */ 2576 s->flags |= SEC_EXCLUDE; 2577 continue; 2578 } 2579 2580 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2581 continue; 2582 2583 /* Allocate memory for the section contents. We use bfd_zalloc 2584 here in case unused entries are not reclaimed before the 2585 section's contents are written out. This should not happen, 2586 but this way if it does, we get a R_OR1K_NONE reloc instead 2587 of garbage. */ 2588 s->contents = bfd_zalloc (dynobj, s->size); 2589 2590 if (s->contents == NULL) 2591 return FALSE; 2592 } 2593 2594 if (htab->root.dynamic_sections_created) 2595 { 2596 /* Add some entries to the .dynamic section. We fill in the 2597 values later, in or1k_elf_finish_dynamic_sections, but we 2598 must add the entries now so that we get the correct size for 2599 the .dynamic section. The DT_DEBUG entry is filled in by the 2600 dynamic linker and used by the debugger. */ 2601 #define add_dynamic_entry(TAG, VAL) \ 2602 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2603 2604 if (info->executable) 2605 { 2606 if (! add_dynamic_entry (DT_DEBUG, 0)) 2607 return FALSE; 2608 } 2609 2610 if (htab->splt->size != 0) 2611 { 2612 if (! add_dynamic_entry (DT_PLTGOT, 0) 2613 || ! add_dynamic_entry (DT_PLTRELSZ, 0) 2614 || ! add_dynamic_entry (DT_PLTREL, DT_RELA) 2615 || ! add_dynamic_entry (DT_JMPREL, 0)) 2616 return FALSE; 2617 } 2618 2619 if (relocs) 2620 { 2621 if (! add_dynamic_entry (DT_RELA, 0) 2622 || ! add_dynamic_entry (DT_RELASZ, 0) 2623 || ! add_dynamic_entry (DT_RELAENT, 2624 sizeof (Elf32_External_Rela))) 2625 return FALSE; 2626 2627 /* If any dynamic relocs apply to a read-only section, 2628 then we need a DT_TEXTREL entry. */ 2629 if ((info->flags & DF_TEXTREL) == 0) 2630 elf_link_hash_traverse (&htab->root, readonly_dynrelocs, 2631 info); 2632 2633 if ((info->flags & DF_TEXTREL) != 0) 2634 { 2635 if (! add_dynamic_entry (DT_TEXTREL, 0)) 2636 return FALSE; 2637 } 2638 } 2639 } 2640 2641 #undef add_dynamic_entry 2642 return TRUE; 2643 } 2644 2645 /* Create dynamic sections when linking against a dynamic object. */ 2646 2647 static bfd_boolean 2648 or1k_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) 2649 { 2650 struct elf_or1k_link_hash_table *htab; 2651 2652 htab = or1k_elf_hash_table (info); 2653 if (htab == NULL) 2654 return FALSE; 2655 2656 if (!htab->sgot && !create_got_section (dynobj, info)) 2657 return FALSE; 2658 2659 if (!_bfd_elf_create_dynamic_sections (dynobj, info)) 2660 return FALSE; 2661 2662 htab->splt = bfd_get_section_by_name (dynobj, ".plt"); 2663 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); 2664 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); 2665 if (!info->shared) 2666 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); 2667 2668 if (!htab->splt || !htab->srelplt || !htab->sdynbss 2669 || (!info->shared && !htab->srelbss)) 2670 abort (); 2671 2672 return TRUE; 2673 } 2674 2675 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 2676 2677 static void 2678 or1k_elf_copy_indirect_symbol (struct bfd_link_info *info, 2679 struct elf_link_hash_entry *dir, 2680 struct elf_link_hash_entry *ind) 2681 { 2682 struct elf_or1k_link_hash_entry * edir; 2683 struct elf_or1k_link_hash_entry * eind; 2684 2685 edir = (struct elf_or1k_link_hash_entry *) dir; 2686 eind = (struct elf_or1k_link_hash_entry *) ind; 2687 2688 if (eind->dyn_relocs != NULL) 2689 { 2690 if (edir->dyn_relocs != NULL) 2691 { 2692 struct elf_or1k_dyn_relocs **pp; 2693 struct elf_or1k_dyn_relocs *p; 2694 2695 /* Add reloc counts against the indirect sym to the direct sym 2696 list. Merge any entries against the same section. */ 2697 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) 2698 { 2699 struct elf_or1k_dyn_relocs *q; 2700 2701 for (q = edir->dyn_relocs; q != NULL; q = q->next) 2702 if (q->sec == p->sec) 2703 { 2704 q->pc_count += p->pc_count; 2705 q->count += p->count; 2706 *pp = p->next; 2707 break; 2708 } 2709 if (q == NULL) 2710 pp = &p->next; 2711 } 2712 *pp = edir->dyn_relocs; 2713 } 2714 2715 edir->dyn_relocs = eind->dyn_relocs; 2716 eind->dyn_relocs = NULL; 2717 } 2718 2719 if (ind->root.type == bfd_link_hash_indirect) 2720 { 2721 if (dir->got.refcount <= 0) 2722 { 2723 edir->tls_type = eind->tls_type; 2724 eind->tls_type = TLS_UNKNOWN; 2725 } 2726 } 2727 2728 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 2729 } 2730 2731 /* Set the right machine number. */ 2732 2733 static bfd_boolean 2734 or1k_elf_object_p (bfd *abfd) 2735 { 2736 unsigned long mach = bfd_mach_or1k; 2737 2738 if (elf_elfheader (abfd)->e_flags & EF_OR1K_NODELAY) 2739 mach = bfd_mach_or1knd; 2740 2741 return bfd_default_set_arch_mach (abfd, bfd_arch_or1k, mach); 2742 } 2743 2744 /* Store the machine number in the flags field. */ 2745 2746 static void 2747 or1k_elf_final_write_processing (bfd *abfd, 2748 bfd_boolean linker ATTRIBUTE_UNUSED) 2749 { 2750 switch (bfd_get_mach (abfd)) 2751 { 2752 default: 2753 case bfd_mach_or1k: 2754 break; 2755 case bfd_mach_or1knd: 2756 elf_elfheader (abfd)->e_flags |= EF_OR1K_NODELAY; 2757 break; 2758 } 2759 } 2760 2761 static bfd_boolean 2762 or1k_elf_set_private_flags (bfd *abfd, flagword flags) 2763 { 2764 BFD_ASSERT (!elf_flags_init (abfd) 2765 || elf_elfheader (abfd)->e_flags == flags); 2766 2767 elf_elfheader (abfd)->e_flags = flags; 2768 elf_flags_init (abfd) = TRUE; 2769 return TRUE; 2770 } 2771 2772 /* Make sure all input files are consistent with respect to 2773 EF_OR1K_NODELAY flag setting. */ 2774 2775 static bfd_boolean 2776 elf32_or1k_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 2777 { 2778 flagword out_flags; 2779 flagword in_flags; 2780 2781 in_flags = elf_elfheader (ibfd)->e_flags; 2782 out_flags = elf_elfheader (obfd)->e_flags; 2783 2784 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 2785 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 2786 return TRUE; 2787 2788 if (!elf_flags_init (obfd)) 2789 { 2790 elf_flags_init (obfd) = TRUE; 2791 elf_elfheader (obfd)->e_flags = in_flags; 2792 2793 return TRUE; 2794 } 2795 2796 if (in_flags == out_flags) 2797 return TRUE; 2798 2799 if ((in_flags & EF_OR1K_NODELAY) != (out_flags & EF_OR1K_NODELAY)) 2800 { 2801 (*_bfd_error_handler) 2802 (_("%B: EF_OR1K_NODELAY flag mismatch with previous modules"), ibfd); 2803 2804 bfd_set_error (bfd_error_bad_value); 2805 return FALSE; 2806 } 2807 2808 return TRUE; 2809 2810 } 2811 2812 #define ELF_ARCH bfd_arch_or1k 2813 #define ELF_MACHINE_CODE EM_OR1K 2814 #define ELF_TARGET_ID OR1K_ELF_DATA 2815 #define ELF_MAXPAGESIZE 0x2000 2816 2817 #define TARGET_BIG_SYM or1k_elf32_vec 2818 #define TARGET_BIG_NAME "elf32-or1k" 2819 2820 #define elf_info_to_howto_rel NULL 2821 #define elf_info_to_howto or1k_info_to_howto_rela 2822 #define elf_backend_relocate_section or1k_elf_relocate_section 2823 #define elf_backend_gc_mark_hook or1k_elf_gc_mark_hook 2824 #define elf_backend_gc_sweep_hook or1k_elf_gc_sweep_hook 2825 #define elf_backend_check_relocs or1k_elf_check_relocs 2826 #define elf_backend_reloc_type_class or1k_elf_reloc_type_class 2827 #define elf_backend_can_gc_sections 1 2828 #define elf_backend_rela_normal 1 2829 2830 #define bfd_elf32_mkobject elf_or1k_mkobject 2831 2832 #define bfd_elf32_bfd_merge_private_bfd_data elf32_or1k_merge_private_bfd_data 2833 #define bfd_elf32_bfd_set_private_flags or1k_elf_set_private_flags 2834 #define bfd_elf32_bfd_reloc_type_lookup or1k_reloc_type_lookup 2835 #define bfd_elf32_bfd_reloc_name_lookup or1k_reloc_name_lookup 2836 2837 #define elf_backend_object_p or1k_elf_object_p 2838 #define elf_backend_final_write_processing or1k_elf_final_write_processing 2839 #define elf_backend_can_refcount 1 2840 2841 #define elf_backend_plt_readonly 1 2842 #define elf_backend_want_got_plt 1 2843 #define elf_backend_want_plt_sym 0 2844 #define elf_backend_got_header_size 12 2845 #define bfd_elf32_bfd_link_hash_table_create or1k_elf_link_hash_table_create 2846 #define elf_backend_copy_indirect_symbol or1k_elf_copy_indirect_symbol 2847 #define elf_backend_create_dynamic_sections or1k_elf_create_dynamic_sections 2848 #define elf_backend_finish_dynamic_sections or1k_elf_finish_dynamic_sections 2849 #define elf_backend_size_dynamic_sections or1k_elf_size_dynamic_sections 2850 #define elf_backend_adjust_dynamic_symbol or1k_elf_adjust_dynamic_symbol 2851 #define elf_backend_finish_dynamic_symbol or1k_elf_finish_dynamic_symbol 2852 2853 #include "elf32-target.h" 2854
