elf32-or1k.c revision 1.1.1.4
1 /* Or1k-specific support for 32-bit ELF. 2 Copyright (C) 2001-2017 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 3, /* size (0 = byte, 1 = short, 2 = long) */ 64 0, /* 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 TRUE), /* 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 TRUE), /* 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 TRUE), /* 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 /* Small local sym to section mapping cache. */ 619 struct sym_cache sym_sec; 620 }; 621 622 /* Get the ELF linker hash table from a link_info structure. */ 623 #define or1k_elf_hash_table(p) \ 624 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 625 == OR1K_ELF_DATA ? ((struct elf_or1k_link_hash_table *) ((p)->hash)) : NULL) 626 627 static bfd_boolean 628 elf_or1k_mkobject (bfd *abfd) 629 { 630 return bfd_elf_allocate_object (abfd, sizeof (struct elf_or1k_obj_tdata), 631 OR1K_ELF_DATA); 632 } 633 634 /* Create an entry in an or1k ELF linker hash table. */ 635 636 static struct bfd_hash_entry * 637 or1k_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 638 struct bfd_hash_table *table, 639 const char *string) 640 { 641 struct elf_or1k_link_hash_entry *ret = 642 (struct elf_or1k_link_hash_entry *) entry; 643 644 /* Allocate the structure if it has not already been allocated by a 645 subclass. */ 646 if (ret == NULL) 647 ret = bfd_hash_allocate (table, 648 sizeof (struct elf_or1k_link_hash_entry)); 649 if (ret == NULL) 650 return NULL; 651 652 /* Call the allocation method of the superclass. */ 653 ret = ((struct elf_or1k_link_hash_entry *) 654 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 655 table, string)); 656 if (ret != NULL) 657 { 658 struct elf_or1k_link_hash_entry *eh; 659 660 eh = (struct elf_or1k_link_hash_entry *) ret; 661 eh->dyn_relocs = NULL; 662 eh->tls_type = TLS_UNKNOWN; 663 } 664 665 return (struct bfd_hash_entry *) ret; 666 } 667 668 /* Create an or1k ELF linker hash table. */ 669 670 static struct bfd_link_hash_table * 671 or1k_elf_link_hash_table_create (bfd *abfd) 672 { 673 struct elf_or1k_link_hash_table *ret; 674 bfd_size_type amt = sizeof (struct elf_or1k_link_hash_table); 675 676 ret = bfd_zmalloc (amt); 677 if (ret == NULL) 678 return NULL; 679 680 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, 681 or1k_elf_link_hash_newfunc, 682 sizeof (struct elf_or1k_link_hash_entry), 683 OR1K_ELF_DATA)) 684 { 685 free (ret); 686 return NULL; 687 } 688 689 return &ret->root.root; 690 } 691 692 static reloc_howto_type * 693 or1k_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, 694 bfd_reloc_code_real_type code) 695 { 696 unsigned int i; 697 698 for (i = ARRAY_SIZE (or1k_reloc_map); i--;) 699 if (or1k_reloc_map[i].bfd_reloc_val == code) 700 return & or1k_elf_howto_table[or1k_reloc_map[i].or1k_reloc_val]; 701 702 return NULL; 703 } 704 705 static reloc_howto_type * 706 or1k_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 707 const char *r_name) 708 { 709 unsigned int i; 710 711 for (i = 0; 712 i < (sizeof (or1k_elf_howto_table) 713 / sizeof (or1k_elf_howto_table[0])); 714 i++) 715 if (or1k_elf_howto_table[i].name != NULL 716 && strcasecmp (or1k_elf_howto_table[i].name, r_name) == 0) 717 return &or1k_elf_howto_table[i]; 718 719 return NULL; 720 } 721 722 /* Set the howto pointer for an Or1k ELF reloc. */ 723 724 static void 725 or1k_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED, 726 arelent * cache_ptr, 727 Elf_Internal_Rela * dst) 728 { 729 unsigned int r_type; 730 731 r_type = ELF32_R_TYPE (dst->r_info); 732 if (r_type >= (unsigned int) R_OR1K_max) 733 { 734 /* xgettext:c-format */ 735 _bfd_error_handler (_("%B: invalid OR1K reloc number: %d"), abfd, r_type); 736 r_type = 0; 737 } 738 cache_ptr->howto = & or1k_elf_howto_table[r_type]; 739 } 740 741 742 /* Return the relocation value for @tpoff relocations.. */ 743 static bfd_vma 744 tpoff (struct bfd_link_info *info, bfd_vma address) 745 { 746 /* If tls_sec is NULL, we should have signalled an error already. */ 747 if (elf_hash_table (info)->tls_sec == NULL) 748 return 0; 749 750 /* The thread pointer on or1k stores the address after the TCB where 751 the data is, just compute the difference. No need to compensate 752 for the size of TCB. */ 753 return (address - elf_hash_table (info)->tls_sec->vma); 754 } 755 756 /* Relocate an Or1k ELF section. 757 758 The RELOCATE_SECTION function is called by the new ELF backend linker 759 to handle the relocations for a section. 760 761 The relocs are always passed as Rela structures; if the section 762 actually uses Rel structures, the r_addend field will always be 763 zero. 764 765 This function is responsible for adjusting the section contents as 766 necessary, and (if using Rela relocs and generating a relocatable 767 output file) adjusting the reloc addend as necessary. 768 769 This function does not have to worry about setting the reloc 770 address or the reloc symbol index. 771 772 LOCAL_SYMS is a pointer to the swapped in local symbols. 773 774 LOCAL_SECTIONS is an array giving the section in the input file 775 corresponding to the st_shndx field of each local symbol. 776 777 The global hash table entry for the global symbols can be found 778 via elf_sym_hashes (input_bfd). 779 780 When generating relocatable output, this function must handle 781 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 782 going to be the section symbol corresponding to the output 783 section, which means that the addend must be adjusted 784 accordingly. */ 785 786 static bfd_boolean 787 or1k_elf_relocate_section (bfd *output_bfd, 788 struct bfd_link_info *info, 789 bfd *input_bfd, 790 asection *input_section, 791 bfd_byte *contents, 792 Elf_Internal_Rela *relocs, 793 Elf_Internal_Sym *local_syms, 794 asection **local_sections) 795 { 796 Elf_Internal_Shdr *symtab_hdr; 797 struct elf_link_hash_entry **sym_hashes; 798 Elf_Internal_Rela *rel; 799 Elf_Internal_Rela *relend; 800 struct elf_or1k_link_hash_table *htab = or1k_elf_hash_table (info); 801 bfd *dynobj; 802 asection *sreloc; 803 bfd_vma *local_got_offsets; 804 asection *sgot; 805 806 if (htab == NULL) 807 return FALSE; 808 809 dynobj = htab->root.dynobj; 810 local_got_offsets = elf_local_got_offsets (input_bfd); 811 812 sreloc = elf_section_data (input_section)->sreloc; 813 814 sgot = htab->root.sgot; 815 816 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 817 sym_hashes = elf_sym_hashes (input_bfd); 818 relend = relocs + input_section->reloc_count; 819 820 for (rel = relocs; rel < relend; rel++) 821 { 822 reloc_howto_type *howto; 823 unsigned long r_symndx; 824 Elf_Internal_Sym *sym; 825 asection *sec; 826 struct elf_link_hash_entry *h; 827 bfd_vma relocation; 828 bfd_reloc_status_type r; 829 const char *name = NULL; 830 int r_type; 831 832 r_type = ELF32_R_TYPE (rel->r_info); 833 r_symndx = ELF32_R_SYM (rel->r_info); 834 835 if (r_type == R_OR1K_GNU_VTINHERIT 836 || r_type == R_OR1K_GNU_VTENTRY) 837 continue; 838 839 if (r_type < 0 || r_type >= (int) R_OR1K_max) 840 { 841 bfd_set_error (bfd_error_bad_value); 842 return FALSE; 843 } 844 845 howto = or1k_elf_howto_table + ELF32_R_TYPE (rel->r_info); 846 h = NULL; 847 sym = NULL; 848 sec = NULL; 849 850 if (r_symndx < symtab_hdr->sh_info) 851 { 852 sym = local_syms + r_symndx; 853 sec = local_sections[r_symndx]; 854 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 855 856 name = bfd_elf_string_from_elf_section 857 (input_bfd, symtab_hdr->sh_link, sym->st_name); 858 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; 859 } 860 else 861 { 862 bfd_boolean unresolved_reloc, warned, ignored; 863 864 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 865 r_symndx, symtab_hdr, sym_hashes, 866 h, sec, relocation, 867 unresolved_reloc, warned, ignored); 868 } 869 870 if (sec != NULL && discarded_section (sec)) 871 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 872 rel, 1, relend, howto, 0, contents); 873 874 if (bfd_link_relocatable (info)) 875 continue; 876 877 switch (howto->type) 878 { 879 case R_OR1K_PLT26: 880 { 881 if (htab->root.splt != NULL && h != NULL 882 && h->plt.offset != (bfd_vma) -1) 883 { 884 relocation = (htab->root.splt->output_section->vma 885 + htab->root.splt->output_offset 886 + h->plt.offset); 887 } 888 break; 889 } 890 891 case R_OR1K_GOT16: 892 /* Relocation is to the entry for this symbol in the global 893 offset table. */ 894 BFD_ASSERT (sgot != NULL); 895 if (h != NULL) 896 { 897 bfd_boolean dyn; 898 bfd_vma off; 899 900 off = h->got.offset; 901 BFD_ASSERT (off != (bfd_vma) -1); 902 903 dyn = htab->root.dynamic_sections_created; 904 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 905 bfd_link_pic (info), 906 h) 907 || (bfd_link_pic (info) 908 && SYMBOL_REFERENCES_LOCAL (info, h))) 909 { 910 /* This is actually a static link, or it is a 911 -Bsymbolic link and the symbol is defined 912 locally, or the symbol was forced to be local 913 because of a version file. We must initialize 914 this entry in the global offset table. Since the 915 offset must always be a multiple of 4, we use the 916 least significant bit to record whether we have 917 initialized it already. 918 919 When doing a dynamic link, we create a .rela.got 920 relocation entry to initialize the value. This 921 is done in the finish_dynamic_symbol routine. */ 922 if ((off & 1) != 0) 923 off &= ~1; 924 else 925 { 926 /* Write entry in GOT. */ 927 bfd_put_32 (output_bfd, relocation, 928 sgot->contents + off); 929 /* Mark GOT entry as having been written. */ 930 h->got.offset |= 1; 931 } 932 } 933 934 relocation = sgot->output_offset + off; 935 } 936 else 937 { 938 bfd_vma off; 939 bfd_byte *loc; 940 941 BFD_ASSERT (local_got_offsets != NULL 942 && local_got_offsets[r_symndx] != (bfd_vma) -1); 943 944 /* Get offset into GOT table. */ 945 off = local_got_offsets[r_symndx]; 946 947 /* The offset must always be a multiple of 4. We use 948 the least significant bit to record whether we have 949 already processed this entry. */ 950 if ((off & 1) != 0) 951 off &= ~1; 952 else 953 { 954 /* Write entry in GOT. */ 955 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 956 if (bfd_link_pic (info)) 957 { 958 asection *srelgot; 959 Elf_Internal_Rela outrel; 960 961 /* We need to generate a R_OR1K_RELATIVE reloc 962 for the dynamic linker. */ 963 srelgot = htab->root.srelgot; 964 BFD_ASSERT (srelgot != NULL); 965 966 outrel.r_offset = (sgot->output_section->vma 967 + sgot->output_offset 968 + off); 969 outrel.r_info = ELF32_R_INFO (0, R_OR1K_RELATIVE); 970 outrel.r_addend = relocation; 971 loc = srelgot->contents; 972 loc += srelgot->reloc_count * sizeof (Elf32_External_Rela); 973 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); 974 ++srelgot->reloc_count; 975 } 976 977 local_got_offsets[r_symndx] |= 1; 978 } 979 relocation = sgot->output_offset + off; 980 } 981 982 /* Addend should be zero. */ 983 if (rel->r_addend != 0) 984 _bfd_error_handler 985 (_("internal error: addend should be zero for R_OR1K_GOT16")); 986 987 break; 988 989 case R_OR1K_GOTOFF_LO16: 990 case R_OR1K_GOTOFF_HI16: 991 /* Relocation is offset from GOT. */ 992 BFD_ASSERT (sgot != NULL); 993 relocation 994 -= (htab->root.hgot->root.u.def.value 995 + htab->root.hgot->root.u.def.section->output_offset 996 + htab->root.hgot->root.u.def.section->output_section->vma); 997 break; 998 999 case R_OR1K_INSN_REL_26: 1000 case R_OR1K_HI_16_IN_INSN: 1001 case R_OR1K_LO_16_IN_INSN: 1002 case R_OR1K_32: 1003 /* R_OR1K_16? */ 1004 { 1005 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols 1006 from removed linkonce sections, or sections discarded by 1007 a linker script. */ 1008 if (r_symndx == STN_UNDEF 1009 || (input_section->flags & SEC_ALLOC) == 0) 1010 break; 1011 1012 if ((bfd_link_pic (info) 1013 && (h == NULL 1014 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1015 || h->root.type != bfd_link_hash_undefweak) 1016 && (howto->type != R_OR1K_INSN_REL_26 1017 || !SYMBOL_CALLS_LOCAL (info, h))) 1018 || (!bfd_link_pic (info) 1019 && h != NULL 1020 && h->dynindx != -1 1021 && !h->non_got_ref 1022 && ((h->def_dynamic 1023 && !h->def_regular) 1024 || h->root.type == bfd_link_hash_undefweak 1025 || h->root.type == bfd_link_hash_undefined))) 1026 { 1027 Elf_Internal_Rela outrel; 1028 bfd_byte *loc; 1029 bfd_boolean skip; 1030 1031 /* When generating a shared object, these relocations 1032 are copied into the output file to be resolved at run 1033 time. */ 1034 1035 BFD_ASSERT (sreloc != NULL); 1036 1037 skip = FALSE; 1038 1039 outrel.r_offset = 1040 _bfd_elf_section_offset (output_bfd, info, input_section, 1041 rel->r_offset); 1042 if (outrel.r_offset == (bfd_vma) -1) 1043 skip = TRUE; 1044 else if (outrel.r_offset == (bfd_vma) -2) 1045 skip = TRUE; 1046 outrel.r_offset += (input_section->output_section->vma 1047 + input_section->output_offset); 1048 1049 if (skip) 1050 memset (&outrel, 0, sizeof outrel); 1051 /* h->dynindx may be -1 if the symbol was marked to 1052 become local. */ 1053 else if (h != NULL 1054 && ((! info->symbolic && h->dynindx != -1) 1055 || !h->def_regular)) 1056 { 1057 BFD_ASSERT (h->dynindx != -1); 1058 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 1059 outrel.r_addend = rel->r_addend; 1060 } 1061 else 1062 { 1063 if (r_type == R_OR1K_32) 1064 { 1065 outrel.r_info = ELF32_R_INFO (0, R_OR1K_RELATIVE); 1066 outrel.r_addend = relocation + rel->r_addend; 1067 } 1068 else 1069 { 1070 BFD_FAIL (); 1071 _bfd_error_handler 1072 (_("%B: probably compiled without -fPIC?"), 1073 input_bfd); 1074 bfd_set_error (bfd_error_bad_value); 1075 return FALSE; 1076 } 1077 } 1078 1079 loc = sreloc->contents; 1080 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 1081 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1082 break; 1083 } 1084 break; 1085 } 1086 1087 case R_OR1K_TLS_LDM_HI16: 1088 case R_OR1K_TLS_LDM_LO16: 1089 case R_OR1K_TLS_LDO_HI16: 1090 case R_OR1K_TLS_LDO_LO16: 1091 /* TODO: implement support for local dynamic. */ 1092 BFD_FAIL (); 1093 _bfd_error_handler 1094 (_("%B: support for local dynamic not implemented"), 1095 input_bfd); 1096 bfd_set_error (bfd_error_bad_value); 1097 return FALSE; 1098 1099 1100 case R_OR1K_TLS_GD_HI16: 1101 case R_OR1K_TLS_GD_LO16: 1102 case R_OR1K_TLS_IE_HI16: 1103 case R_OR1K_TLS_IE_LO16: 1104 { 1105 bfd_vma gotoff; 1106 Elf_Internal_Rela rela; 1107 bfd_byte *loc; 1108 int dynamic; 1109 1110 sreloc = bfd_get_section_by_name (dynobj, ".rela.got"); 1111 1112 /* Mark as TLS related GOT entry by setting 1113 bit 2 as well as bit 1. */ 1114 if (h != NULL) 1115 { 1116 gotoff = h->got.offset; 1117 h->got.offset |= 3; 1118 } 1119 else 1120 { 1121 gotoff = local_got_offsets[r_symndx]; 1122 local_got_offsets[r_symndx] |= 3; 1123 } 1124 1125 /* Only process the relocation once. */ 1126 if (gotoff & 1) 1127 { 1128 relocation = sgot->output_offset + (gotoff & ~3); 1129 break; 1130 } 1131 1132 BFD_ASSERT (elf_hash_table (info)->hgot == NULL 1133 || elf_hash_table (info)->hgot->root.u.def.value == 0); 1134 1135 /* Dynamic entries will require relocations. if we do not need 1136 them we will just use the default R_OR1K_NONE and 1137 not set anything. */ 1138 dynamic = bfd_link_pic (info) 1139 || (sec && (sec->flags & SEC_ALLOC) != 0 1140 && h != NULL 1141 && (h->root.type == bfd_link_hash_defweak || !h->def_regular)); 1142 1143 /* Shared GD. */ 1144 if (dynamic && (howto->type == R_OR1K_TLS_GD_HI16 1145 || howto->type == R_OR1K_TLS_GD_LO16)) 1146 { 1147 int i; 1148 1149 /* Add DTPMOD and DTPOFF GOT and rela entries. */ 1150 for (i = 0; i < 2; ++i) 1151 { 1152 rela.r_offset = sgot->output_section->vma + 1153 sgot->output_offset + gotoff + i*4; 1154 if (h != NULL && h->dynindx != -1) 1155 { 1156 rela.r_info = ELF32_R_INFO (h->dynindx, 1157 (i == 0 ? R_OR1K_TLS_DTPMOD : R_OR1K_TLS_DTPOFF)); 1158 rela.r_addend = 0; 1159 } 1160 else 1161 { 1162 rela.r_info = ELF32_R_INFO (0, 1163 (i == 0 ? R_OR1K_TLS_DTPMOD : R_OR1K_TLS_DTPOFF)); 1164 rela.r_addend = tpoff (info, relocation); 1165 } 1166 1167 loc = sreloc->contents; 1168 loc += sreloc->reloc_count++ * 1169 sizeof (Elf32_External_Rela); 1170 1171 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1172 bfd_put_32 (output_bfd, 0, sgot->contents + gotoff + i*4); 1173 } 1174 } 1175 /* Static GD. */ 1176 else if (howto->type == R_OR1K_TLS_GD_HI16 1177 || howto->type == R_OR1K_TLS_GD_LO16) 1178 { 1179 bfd_put_32 (output_bfd, 1, sgot->contents + gotoff); 1180 bfd_put_32 (output_bfd, tpoff (info, relocation), 1181 sgot->contents + gotoff + 4); 1182 } 1183 /* Shared IE. */ 1184 else if (dynamic) 1185 { 1186 /* Add TPOFF GOT and rela entries. */ 1187 rela.r_offset = sgot->output_section->vma + 1188 sgot->output_offset + gotoff; 1189 if (h != NULL && h->dynindx != -1) 1190 { 1191 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_TLS_TPOFF); 1192 rela.r_addend = 0; 1193 } 1194 else 1195 { 1196 rela.r_info = ELF32_R_INFO (0, R_OR1K_TLS_TPOFF); 1197 rela.r_addend = tpoff (info, relocation); 1198 } 1199 1200 loc = sreloc->contents; 1201 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 1202 1203 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1204 bfd_put_32 (output_bfd, 0, sgot->contents + gotoff); 1205 } 1206 /* Static IE. */ 1207 else 1208 { 1209 bfd_put_32 (output_bfd, tpoff (info, relocation), 1210 sgot->contents + gotoff); 1211 } 1212 relocation = sgot->output_offset + gotoff; 1213 break; 1214 } 1215 case R_OR1K_TLS_LE_HI16: 1216 case R_OR1K_TLS_LE_LO16: 1217 1218 /* Relocation is offset from TP. */ 1219 relocation = tpoff (info, relocation); 1220 break; 1221 1222 case R_OR1K_TLS_DTPMOD: 1223 case R_OR1K_TLS_DTPOFF: 1224 case R_OR1K_TLS_TPOFF: 1225 /* These are resolved dynamically on load and shouldn't 1226 be used as linker input. */ 1227 BFD_FAIL (); 1228 _bfd_error_handler 1229 (_("%B: will not resolve runtime TLS relocation"), 1230 input_bfd); 1231 bfd_set_error (bfd_error_bad_value); 1232 return FALSE; 1233 1234 default: 1235 break; 1236 } 1237 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents, 1238 rel->r_offset, relocation, rel->r_addend); 1239 1240 if (r != bfd_reloc_ok) 1241 { 1242 const char *msg = NULL; 1243 1244 switch (r) 1245 { 1246 case bfd_reloc_overflow: 1247 (*info->callbacks->reloc_overflow) 1248 (info, (h ? &h->root : NULL), name, howto->name, 1249 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 1250 break; 1251 1252 case bfd_reloc_undefined: 1253 (*info->callbacks->undefined_symbol) 1254 (info, name, input_bfd, input_section, rel->r_offset, TRUE); 1255 break; 1256 1257 case bfd_reloc_outofrange: 1258 msg = _("internal error: out of range error"); 1259 break; 1260 1261 case bfd_reloc_notsupported: 1262 msg = _("internal error: unsupported relocation error"); 1263 break; 1264 1265 case bfd_reloc_dangerous: 1266 msg = _("internal error: dangerous relocation"); 1267 break; 1268 1269 default: 1270 msg = _("internal error: unknown error"); 1271 break; 1272 } 1273 1274 if (msg) 1275 (*info->callbacks->warning) (info, msg, name, input_bfd, 1276 input_section, rel->r_offset); 1277 } 1278 } 1279 1280 return TRUE; 1281 } 1282 1283 /* Return the section that should be marked against GC for a given 1284 relocation. */ 1285 1286 static asection * 1287 or1k_elf_gc_mark_hook (asection *sec, 1288 struct bfd_link_info *info, 1289 Elf_Internal_Rela *rel, 1290 struct elf_link_hash_entry *h, 1291 Elf_Internal_Sym *sym) 1292 { 1293 if (h != NULL) 1294 switch (ELF32_R_TYPE (rel->r_info)) 1295 { 1296 case R_OR1K_GNU_VTINHERIT: 1297 case R_OR1K_GNU_VTENTRY: 1298 return NULL; 1299 } 1300 1301 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1302 } 1303 1304 static bfd_boolean 1305 or1k_elf_gc_sweep_hook (bfd *abfd, 1306 struct bfd_link_info *info ATTRIBUTE_UNUSED, 1307 asection *sec, 1308 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) 1309 { 1310 /* Update the got entry reference counts for the section being removed. */ 1311 Elf_Internal_Shdr *symtab_hdr; 1312 struct elf_link_hash_entry **sym_hashes; 1313 bfd_signed_vma *local_got_refcounts; 1314 const Elf_Internal_Rela *rel, *relend; 1315 1316 elf_section_data (sec)->local_dynrel = NULL; 1317 1318 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1319 sym_hashes = elf_sym_hashes (abfd); 1320 local_got_refcounts = elf_local_got_refcounts (abfd); 1321 1322 relend = relocs + sec->reloc_count; 1323 for (rel = relocs; rel < relend; rel++) 1324 { 1325 unsigned long r_symndx; 1326 struct elf_link_hash_entry *h = NULL; 1327 1328 r_symndx = ELF32_R_SYM (rel->r_info); 1329 if (r_symndx >= symtab_hdr->sh_info) 1330 { 1331 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1332 while (h->root.type == bfd_link_hash_indirect 1333 || h->root.type == bfd_link_hash_warning) 1334 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1335 } 1336 1337 switch (ELF32_R_TYPE (rel->r_info)) 1338 { 1339 case R_OR1K_GOT16: 1340 if (h != NULL) 1341 { 1342 if (h->got.refcount > 0) 1343 h->got.refcount--; 1344 } 1345 else 1346 { 1347 if (local_got_refcounts && local_got_refcounts[r_symndx] > 0) 1348 local_got_refcounts[r_symndx]--; 1349 } 1350 break; 1351 1352 default: 1353 break; 1354 } 1355 } 1356 return TRUE; 1357 } 1358 1359 /* Look through the relocs for a section during the first phase. */ 1360 1361 static bfd_boolean 1362 or1k_elf_check_relocs (bfd *abfd, 1363 struct bfd_link_info *info, 1364 asection *sec, 1365 const Elf_Internal_Rela *relocs) 1366 { 1367 Elf_Internal_Shdr *symtab_hdr; 1368 struct elf_link_hash_entry **sym_hashes; 1369 const Elf_Internal_Rela *rel; 1370 1371 const Elf_Internal_Rela *rel_end; 1372 struct elf_or1k_link_hash_table *htab; 1373 bfd *dynobj; 1374 asection *sreloc = NULL; 1375 1376 if (bfd_link_relocatable (info)) 1377 return TRUE; 1378 1379 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1380 sym_hashes = elf_sym_hashes (abfd); 1381 1382 htab = or1k_elf_hash_table (info); 1383 if (htab == NULL) 1384 return FALSE; 1385 1386 dynobj = htab->root.dynobj; 1387 1388 rel_end = relocs + sec->reloc_count; 1389 for (rel = relocs; rel < rel_end; rel++) 1390 { 1391 struct elf_link_hash_entry *h; 1392 unsigned long r_symndx; 1393 unsigned char tls_type; 1394 1395 r_symndx = ELF32_R_SYM (rel->r_info); 1396 if (r_symndx < symtab_hdr->sh_info) 1397 h = NULL; 1398 else 1399 { 1400 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1401 while (h->root.type == bfd_link_hash_indirect 1402 || h->root.type == bfd_link_hash_warning) 1403 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1404 1405 /* PR15323, ref flags aren't set for references in the same 1406 object. */ 1407 h->root.non_ir_ref = 1; 1408 } 1409 1410 switch (ELF32_R_TYPE (rel->r_info)) 1411 { 1412 case R_OR1K_TLS_GD_HI16: 1413 case R_OR1K_TLS_GD_LO16: 1414 tls_type = TLS_GD; 1415 break; 1416 case R_OR1K_TLS_LDM_HI16: 1417 case R_OR1K_TLS_LDM_LO16: 1418 case R_OR1K_TLS_LDO_HI16: 1419 case R_OR1K_TLS_LDO_LO16: 1420 tls_type = TLS_LD; 1421 break; 1422 case R_OR1K_TLS_IE_HI16: 1423 case R_OR1K_TLS_IE_LO16: 1424 tls_type = TLS_IE; 1425 break; 1426 case R_OR1K_TLS_LE_HI16: 1427 case R_OR1K_TLS_LE_LO16: 1428 tls_type = TLS_LE; 1429 break; 1430 default: 1431 tls_type = TLS_NONE; 1432 } 1433 1434 /* Record TLS type. */ 1435 if (h != NULL) 1436 ((struct elf_or1k_link_hash_entry *) h)->tls_type = tls_type; 1437 else 1438 { 1439 unsigned char *local_tls_type; 1440 1441 /* This is a TLS type record for a local symbol. */ 1442 local_tls_type = (unsigned char *) elf_or1k_local_tls_type (abfd); 1443 if (local_tls_type == NULL) 1444 { 1445 bfd_size_type size; 1446 1447 size = symtab_hdr->sh_info; 1448 local_tls_type = bfd_zalloc (abfd, size); 1449 if (local_tls_type == NULL) 1450 return FALSE; 1451 elf_or1k_local_tls_type (abfd) = local_tls_type; 1452 } 1453 local_tls_type[r_symndx] = tls_type; 1454 } 1455 1456 switch (ELF32_R_TYPE (rel->r_info)) 1457 { 1458 /* This relocation describes the C++ object vtable hierarchy. 1459 Reconstruct it for later use during GC. */ 1460 case R_OR1K_GNU_VTINHERIT: 1461 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1462 return FALSE; 1463 break; 1464 1465 /* This relocation describes which C++ vtable entries are actually 1466 used. Record for later use during GC. */ 1467 case R_OR1K_GNU_VTENTRY: 1468 BFD_ASSERT (h != NULL); 1469 if (h != NULL 1470 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1471 return FALSE; 1472 break; 1473 1474 /* This relocation requires .plt entry. */ 1475 case R_OR1K_PLT26: 1476 if (h != NULL) 1477 { 1478 h->needs_plt = 1; 1479 h->plt.refcount += 1; 1480 } 1481 break; 1482 1483 case R_OR1K_GOT16: 1484 case R_OR1K_GOTOFF_HI16: 1485 case R_OR1K_GOTOFF_LO16: 1486 case R_OR1K_TLS_GD_HI16: 1487 case R_OR1K_TLS_GD_LO16: 1488 case R_OR1K_TLS_IE_HI16: 1489 case R_OR1K_TLS_IE_LO16: 1490 if (htab->root.sgot == NULL) 1491 { 1492 if (dynobj == NULL) 1493 htab->root.dynobj = dynobj = abfd; 1494 if (!_bfd_elf_create_got_section (dynobj, info)) 1495 return FALSE; 1496 } 1497 1498 if (ELF32_R_TYPE (rel->r_info) != R_OR1K_GOTOFF_HI16 && 1499 ELF32_R_TYPE (rel->r_info) != R_OR1K_GOTOFF_LO16) 1500 { 1501 if (h != NULL) 1502 h->got.refcount += 1; 1503 else 1504 { 1505 bfd_signed_vma *local_got_refcounts; 1506 1507 /* This is a global offset table entry for a local symbol. */ 1508 local_got_refcounts = elf_local_got_refcounts (abfd); 1509 if (local_got_refcounts == NULL) 1510 { 1511 bfd_size_type size; 1512 1513 size = symtab_hdr->sh_info; 1514 size *= sizeof (bfd_signed_vma); 1515 local_got_refcounts = bfd_zalloc (abfd, size); 1516 if (local_got_refcounts == NULL) 1517 return FALSE; 1518 elf_local_got_refcounts (abfd) = local_got_refcounts; 1519 } 1520 local_got_refcounts[r_symndx] += 1; 1521 } 1522 } 1523 break; 1524 1525 case R_OR1K_INSN_REL_26: 1526 case R_OR1K_HI_16_IN_INSN: 1527 case R_OR1K_LO_16_IN_INSN: 1528 case R_OR1K_32: 1529 /* R_OR1K_16? */ 1530 { 1531 if (h != NULL && !bfd_link_pic (info)) 1532 { 1533 /* We may need a copy reloc. */ 1534 h->non_got_ref = 1; 1535 1536 /* We may also need a .plt entry. */ 1537 h->plt.refcount += 1; 1538 if (ELF32_R_TYPE (rel->r_info) != R_OR1K_INSN_REL_26) 1539 h->pointer_equality_needed = 1; 1540 } 1541 1542 /* If we are creating a shared library, and this is a reloc 1543 against a global symbol, or a non PC relative reloc 1544 against a local symbol, then we need to copy the reloc 1545 into the shared library. However, if we are linking with 1546 -Bsymbolic, we do not need to copy a reloc against a 1547 global symbol which is defined in an object we are 1548 including in the link (i.e., DEF_REGULAR is set). At 1549 this point we have not seen all the input files, so it is 1550 possible that DEF_REGULAR is not set now but will be set 1551 later (it is never cleared). In case of a weak definition, 1552 DEF_REGULAR may be cleared later by a strong definition in 1553 a shared library. We account for that possibility below by 1554 storing information in the relocs_copied field of the hash 1555 table entry. A similar situation occurs when creating 1556 shared libraries and symbol visibility changes render the 1557 symbol local. 1558 1559 If on the other hand, we are creating an executable, we 1560 may need to keep relocations for symbols satisfied by a 1561 dynamic library if we manage to avoid copy relocs for the 1562 symbol. */ 1563 1564 if ((bfd_link_pic (info) 1565 && (sec->flags & SEC_ALLOC) != 0 1566 && (ELF32_R_TYPE (rel->r_info) != R_OR1K_INSN_REL_26 1567 || (h != NULL 1568 && (!SYMBOLIC_BIND (info, h) 1569 || h->root.type == bfd_link_hash_defweak 1570 || !h->def_regular)))) 1571 || (!bfd_link_pic (info) 1572 && (sec->flags & SEC_ALLOC) != 0 1573 && h != NULL 1574 && (h->root.type == bfd_link_hash_defweak 1575 || !h->def_regular))) 1576 { 1577 struct elf_or1k_dyn_relocs *p; 1578 struct elf_or1k_dyn_relocs **head; 1579 1580 /* When creating a shared object, we must copy these 1581 relocs into the output file. We create a reloc 1582 section in dynobj and make room for the reloc. */ 1583 if (sreloc == NULL) 1584 { 1585 const char *name; 1586 unsigned int strndx = elf_elfheader (abfd)->e_shstrndx; 1587 unsigned int shnam = _bfd_elf_single_rel_hdr (sec)->sh_name; 1588 1589 name = bfd_elf_string_from_elf_section (abfd, strndx, shnam); 1590 if (name == NULL) 1591 return FALSE; 1592 1593 if (strncmp (name, ".rela", 5) != 0 1594 || strcmp (bfd_get_section_name (abfd, sec), 1595 name + 5) != 0) 1596 { 1597 _bfd_error_handler 1598 /* xgettext:c-format */ 1599 (_("%B: bad relocation section name `%s\'"), 1600 abfd, name); 1601 } 1602 1603 if (htab->root.dynobj == NULL) 1604 htab->root.dynobj = abfd; 1605 dynobj = htab->root.dynobj; 1606 1607 sreloc = bfd_get_section_by_name (dynobj, name); 1608 if (sreloc == NULL) 1609 { 1610 sreloc = _bfd_elf_make_dynamic_reloc_section 1611 (sec, dynobj, 2, abfd, /*rela?*/ TRUE); 1612 1613 if (sreloc == NULL) 1614 return FALSE; 1615 } 1616 elf_section_data (sec)->sreloc = sreloc; 1617 } 1618 1619 /* If this is a global symbol, we count the number of 1620 relocations we need for this symbol. */ 1621 if (h != NULL) 1622 head = &((struct elf_or1k_link_hash_entry *) h)->dyn_relocs; 1623 else 1624 { 1625 /* Track dynamic relocs needed for local syms too. 1626 We really need local syms available to do this 1627 easily. Oh well. */ 1628 1629 asection *s; 1630 Elf_Internal_Sym *isym; 1631 void *vpp; 1632 1633 isym = bfd_sym_from_r_symndx (&htab->sym_sec, 1634 abfd, r_symndx); 1635 if (isym == NULL) 1636 return FALSE; 1637 1638 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 1639 if (s == NULL) 1640 return FALSE; 1641 1642 vpp = &elf_section_data (s)->local_dynrel; 1643 head = (struct elf_or1k_dyn_relocs **) vpp; 1644 } 1645 1646 p = *head; 1647 if (p == NULL || p->sec != sec) 1648 { 1649 bfd_size_type amt = sizeof *p; 1650 p = ((struct elf_or1k_dyn_relocs *) 1651 bfd_alloc (htab->root.dynobj, amt)); 1652 if (p == NULL) 1653 return FALSE; 1654 p->next = *head; 1655 *head = p; 1656 p->sec = sec; 1657 p->count = 0; 1658 p->pc_count = 0; 1659 } 1660 1661 p->count += 1; 1662 if (ELF32_R_TYPE (rel->r_info) == R_OR1K_INSN_REL_26) 1663 p->pc_count += 1; 1664 } 1665 } 1666 break; 1667 } 1668 } 1669 1670 return TRUE; 1671 } 1672 1673 /* Finish up the dynamic sections. */ 1674 1675 static bfd_boolean 1676 or1k_elf_finish_dynamic_sections (bfd *output_bfd, 1677 struct bfd_link_info *info) 1678 { 1679 bfd *dynobj; 1680 asection *sdyn, *sgot; 1681 struct elf_or1k_link_hash_table *htab; 1682 1683 htab = or1k_elf_hash_table (info); 1684 if (htab == NULL) 1685 return FALSE; 1686 1687 dynobj = htab->root.dynobj; 1688 1689 sgot = htab->root.sgotplt; 1690 sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); 1691 1692 if (htab->root.dynamic_sections_created) 1693 { 1694 asection *splt; 1695 Elf32_External_Dyn *dyncon, *dynconend; 1696 1697 BFD_ASSERT (sgot != NULL && sdyn != NULL); 1698 1699 dyncon = (Elf32_External_Dyn *) sdyn->contents; 1700 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 1701 1702 for (; dyncon < dynconend; dyncon++) 1703 { 1704 Elf_Internal_Dyn dyn; 1705 asection *s; 1706 1707 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 1708 1709 switch (dyn.d_tag) 1710 { 1711 default: 1712 continue; 1713 1714 case DT_PLTGOT: 1715 s = htab->root.sgotplt; 1716 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 1717 break; 1718 1719 case DT_JMPREL: 1720 s = htab->root.srelplt; 1721 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 1722 break; 1723 1724 case DT_PLTRELSZ: 1725 s = htab->root.srelplt; 1726 dyn.d_un.d_val = s->size; 1727 break; 1728 } 1729 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1730 } 1731 1732 1733 /* Fill in the first entry in the procedure linkage table. */ 1734 splt = htab->root.splt; 1735 if (splt && splt->size > 0) 1736 { 1737 if (bfd_link_pic (info)) 1738 { 1739 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, 1740 splt->contents); 1741 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, 1742 splt->contents + 4); 1743 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, 1744 splt->contents + 8); 1745 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, 1746 splt->contents + 12); 1747 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, 1748 splt->contents + 16); 1749 } 1750 else 1751 { 1752 unsigned long addr; 1753 /* addr = .got + 4 */ 1754 addr = sgot->output_section->vma + sgot->output_offset + 4; 1755 bfd_put_32 (output_bfd, 1756 PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), 1757 splt->contents); 1758 bfd_put_32 (output_bfd, 1759 PLT0_ENTRY_WORD1 | (addr & 0xffff), 1760 splt->contents + 4); 1761 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); 1762 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); 1763 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); 1764 } 1765 1766 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; 1767 } 1768 } 1769 1770 /* Set the first entry in the global offset table to the address of 1771 the dynamic section. */ 1772 if (sgot && sgot->size > 0) 1773 { 1774 if (sdyn == NULL) 1775 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 1776 else 1777 bfd_put_32 (output_bfd, 1778 sdyn->output_section->vma + sdyn->output_offset, 1779 sgot->contents); 1780 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 1781 } 1782 1783 if (htab->root.sgot && htab->root.sgot->size > 0) 1784 elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize = 4; 1785 1786 return TRUE; 1787 } 1788 1789 /* Finish up dynamic symbol handling. We set the contents of various 1790 dynamic sections here. */ 1791 1792 static bfd_boolean 1793 or1k_elf_finish_dynamic_symbol (bfd *output_bfd, 1794 struct bfd_link_info *info, 1795 struct elf_link_hash_entry *h, 1796 Elf_Internal_Sym *sym) 1797 { 1798 struct elf_or1k_link_hash_table *htab; 1799 bfd_byte *loc; 1800 1801 htab = or1k_elf_hash_table (info); 1802 if (htab == NULL) 1803 return FALSE; 1804 1805 if (h->plt.offset != (bfd_vma) -1) 1806 { 1807 asection *splt; 1808 asection *sgot; 1809 asection *srela; 1810 1811 bfd_vma plt_index; 1812 bfd_vma got_offset; 1813 bfd_vma got_addr; 1814 Elf_Internal_Rela rela; 1815 1816 /* This symbol has an entry in the procedure linkage table. Set 1817 it up. */ 1818 BFD_ASSERT (h->dynindx != -1); 1819 1820 splt = htab->root.splt; 1821 sgot = htab->root.sgotplt; 1822 srela = htab->root.srelplt; 1823 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); 1824 1825 /* Get the index in the procedure linkage table which 1826 corresponds to this symbol. This is the index of this symbol 1827 in all the symbols for which we are making plt entries. The 1828 first entry in the procedure linkage table is reserved. */ 1829 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 1830 1831 /* Get the offset into the .got table of the entry that 1832 corresponds to this function. Each .got entry is 4 bytes. 1833 The first three are reserved. */ 1834 got_offset = (plt_index + 3) * 4; 1835 got_addr = got_offset; 1836 1837 /* Fill in the entry in the procedure linkage table. */ 1838 if (! bfd_link_pic (info)) 1839 { 1840 got_addr += htab->root.sgotplt->output_section->vma 1841 + htab->root.sgotplt->output_offset; 1842 bfd_put_32 (output_bfd, PLT_ENTRY_WORD0 | ((got_addr >> 16) & 0xffff), 1843 splt->contents + h->plt.offset); 1844 bfd_put_32 (output_bfd, PLT_ENTRY_WORD1 | (got_addr & 0xffff), 1845 splt->contents + h->plt.offset + 4); 1846 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, 1847 splt->contents + h->plt.offset + 8); 1848 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3, 1849 splt->contents + h->plt.offset + 12); 1850 bfd_put_32 (output_bfd, PLT_ENTRY_WORD4 1851 | plt_index * sizeof (Elf32_External_Rela), 1852 splt->contents + h->plt.offset + 16); 1853 } 1854 else 1855 { 1856 bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD0 | (got_addr & 0xffff), 1857 splt->contents + h->plt.offset); 1858 bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD1 1859 | plt_index * sizeof (Elf32_External_Rela), 1860 splt->contents + h->plt.offset + 4); 1861 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2, 1862 splt->contents + h->plt.offset + 8); 1863 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3, 1864 splt->contents + h->plt.offset + 12); 1865 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4, 1866 splt->contents + h->plt.offset + 16); 1867 } 1868 1869 /* Fill in the entry in the global offset table. */ 1870 bfd_put_32 (output_bfd, 1871 (splt->output_section->vma 1872 + splt->output_offset), /* Same offset. */ 1873 sgot->contents + got_offset); 1874 1875 /* Fill in the entry in the .rela.plt section. */ 1876 rela.r_offset = (sgot->output_section->vma 1877 + sgot->output_offset 1878 + got_offset); 1879 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_JMP_SLOT); 1880 rela.r_addend = 0; 1881 loc = srela->contents; 1882 loc += plt_index * sizeof (Elf32_External_Rela); 1883 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1884 1885 if (!h->def_regular) 1886 { 1887 /* Mark the symbol as undefined, rather than as defined in 1888 the .plt section. Leave the value alone. */ 1889 sym->st_shndx = SHN_UNDEF; 1890 } 1891 1892 } 1893 1894 if (h->got.offset != (bfd_vma) -1 1895 && (h->got.offset & 2) == 0) /* Homemade TLS check. */ 1896 { 1897 asection *sgot; 1898 asection *srela; 1899 Elf_Internal_Rela rela; 1900 1901 /* This symbol has an entry in the global offset table. Set it 1902 up. */ 1903 sgot = htab->root.sgot; 1904 srela = htab->root.srelgot; 1905 BFD_ASSERT (sgot != NULL && srela != NULL); 1906 1907 rela.r_offset = (sgot->output_section->vma 1908 + sgot->output_offset 1909 + (h->got.offset &~ 1)); 1910 1911 /* If this is a -Bsymbolic link, and the symbol is defined 1912 locally, we just want to emit a RELATIVE reloc. Likewise if 1913 the symbol was forced to be local because of a version file. 1914 The entry in the global offset table will already have been 1915 initialized in the relocate_section function. */ 1916 if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h)) 1917 { 1918 rela.r_info = ELF32_R_INFO (0, R_OR1K_RELATIVE); 1919 rela.r_addend = (h->root.u.def.value 1920 + h->root.u.def.section->output_section->vma 1921 + h->root.u.def.section->output_offset); 1922 } 1923 else 1924 { 1925 BFD_ASSERT ((h->got.offset & 1) == 0); 1926 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); 1927 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_GLOB_DAT); 1928 rela.r_addend = 0; 1929 } 1930 1931 loc = srela->contents; 1932 loc += srela->reloc_count * sizeof (Elf32_External_Rela); 1933 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1934 ++srela->reloc_count; 1935 } 1936 1937 if (h->needs_copy) 1938 { 1939 asection *s; 1940 Elf_Internal_Rela rela; 1941 1942 /* This symbols needs a copy reloc. Set it up. */ 1943 BFD_ASSERT (h->dynindx != -1 1944 && (h->root.type == bfd_link_hash_defined 1945 || h->root.type == bfd_link_hash_defweak)); 1946 1947 rela.r_offset = (h->root.u.def.value 1948 + h->root.u.def.section->output_section->vma 1949 + h->root.u.def.section->output_offset); 1950 rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_COPY); 1951 rela.r_addend = 0; 1952 if (h->root.u.def.section == htab->root.sdynrelro) 1953 s = htab->root.sreldynrelro; 1954 else 1955 s = htab->root.srelbss; 1956 loc = s->contents + s->reloc_count * sizeof (Elf32_External_Rela); 1957 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1958 ++s->reloc_count; 1959 } 1960 1961 /* Mark some specially defined symbols as absolute. */ 1962 if (strcmp (h->root.root.string, "_DYNAMIC") == 0 1963 || h == htab->root.hgot) 1964 sym->st_shndx = SHN_ABS; 1965 1966 return TRUE; 1967 } 1968 1969 static enum elf_reloc_type_class 1970 or1k_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 1971 const asection *rel_sec ATTRIBUTE_UNUSED, 1972 const Elf_Internal_Rela *rela) 1973 { 1974 switch ((int) ELF32_R_TYPE (rela->r_info)) 1975 { 1976 case R_OR1K_RELATIVE: return reloc_class_relative; 1977 case R_OR1K_JMP_SLOT: return reloc_class_plt; 1978 case R_OR1K_COPY: return reloc_class_copy; 1979 default: return reloc_class_normal; 1980 } 1981 } 1982 1983 /* Adjust a symbol defined by a dynamic object and referenced by a 1984 regular object. The current definition is in some section of the 1985 dynamic object, but we're not including those sections. We have to 1986 change the definition to something the rest of the link can 1987 understand. */ 1988 1989 static bfd_boolean 1990 or1k_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 1991 struct elf_link_hash_entry *h) 1992 { 1993 struct elf_or1k_link_hash_table *htab; 1994 struct elf_or1k_link_hash_entry *eh; 1995 struct elf_or1k_dyn_relocs *p; 1996 bfd *dynobj; 1997 asection *s, *srel; 1998 1999 dynobj = elf_hash_table (info)->dynobj; 2000 2001 /* Make sure we know what is going on here. */ 2002 BFD_ASSERT (dynobj != NULL 2003 && (h->needs_plt 2004 || h->u.weakdef != NULL 2005 || (h->def_dynamic 2006 && h->ref_regular 2007 && !h->def_regular))); 2008 2009 /* If this is a function, put it in the procedure linkage table. We 2010 will fill in the contents of the procedure linkage table later, 2011 when we know the address of the .got section. */ 2012 if (h->type == STT_FUNC 2013 || h->needs_plt) 2014 { 2015 if (! bfd_link_pic (info) 2016 && !h->def_dynamic 2017 && !h->ref_dynamic 2018 && h->root.type != bfd_link_hash_undefweak 2019 && h->root.type != bfd_link_hash_undefined) 2020 { 2021 /* This case can occur if we saw a PLT reloc in an input 2022 file, but the symbol was never referred to by a dynamic 2023 object. In such a case, we don't actually need to build 2024 a procedure linkage table, and we can just do a PCREL 2025 reloc instead. */ 2026 h->plt.offset = (bfd_vma) -1; 2027 h->needs_plt = 0; 2028 } 2029 2030 return TRUE; 2031 } 2032 else 2033 h->plt.offset = (bfd_vma) -1; 2034 2035 /* If this is a weak symbol, and there is a real definition, the 2036 processor independent code will have arranged for us to see the 2037 real definition first, and we can just use the same value. */ 2038 if (h->u.weakdef != NULL) 2039 { 2040 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 2041 || h->u.weakdef->root.type == bfd_link_hash_defweak); 2042 h->root.u.def.section = h->u.weakdef->root.u.def.section; 2043 h->root.u.def.value = h->u.weakdef->root.u.def.value; 2044 return TRUE; 2045 } 2046 2047 /* This is a reference to a symbol defined by a dynamic object which 2048 is not a function. */ 2049 2050 /* If we are creating a shared library, we must presume that the 2051 only references to the symbol are via the global offset table. 2052 For such cases we need not do anything here; the relocations will 2053 be handled correctly by relocate_section. */ 2054 if (bfd_link_pic (info)) 2055 return TRUE; 2056 2057 /* If there are no references to this symbol that do not use the 2058 GOT, we don't need to generate a copy reloc. */ 2059 if (!h->non_got_ref) 2060 return TRUE; 2061 2062 /* If -z nocopyreloc was given, we won't generate them either. */ 2063 if (info->nocopyreloc) 2064 { 2065 h->non_got_ref = 0; 2066 return TRUE; 2067 } 2068 2069 eh = (struct elf_or1k_link_hash_entry *) h; 2070 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2071 { 2072 s = p->sec->output_section; 2073 if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0) 2074 break; 2075 } 2076 2077 /* If we didn't find any dynamic relocs in sections which needs the 2078 copy reloc, then we'll be keeping the dynamic relocs and avoiding 2079 the copy reloc. */ 2080 if (p == NULL) 2081 { 2082 h->non_got_ref = 0; 2083 return TRUE; 2084 } 2085 2086 /* We must allocate the symbol in our .dynbss section, which will 2087 become part of the .bss section of the executable. There will be 2088 an entry for this symbol in the .dynsym section. The dynamic 2089 object will contain position independent code, so all references 2090 from the dynamic object to this symbol will go through the global 2091 offset table. The dynamic linker will use the .dynsym entry to 2092 determine the address it must put in the global offset table, so 2093 both the dynamic object and the regular object will refer to the 2094 same memory location for the variable. */ 2095 2096 htab = or1k_elf_hash_table (info); 2097 if (htab == NULL) 2098 return FALSE; 2099 2100 /* We must generate a R_OR1K_COPY reloc to tell the dynamic linker 2101 to copy the initial value out of the dynamic object and into the 2102 runtime process image. We need to remember the offset into the 2103 .rela.bss section we are going to use. */ 2104 if ((h->root.u.def.section->flags & SEC_READONLY) != 0) 2105 { 2106 s = htab->root.sdynrelro; 2107 srel = htab->root.sreldynrelro; 2108 } 2109 else 2110 { 2111 s = htab->root.sdynbss; 2112 srel = htab->root.srelbss; 2113 } 2114 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 2115 { 2116 srel->size += sizeof (Elf32_External_Rela); 2117 h->needs_copy = 1; 2118 } 2119 2120 return _bfd_elf_adjust_dynamic_copy (info, h, s); 2121 } 2122 2123 /* Allocate space in .plt, .got and associated reloc sections for 2124 dynamic relocs. */ 2125 2126 static bfd_boolean 2127 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) 2128 { 2129 struct bfd_link_info *info; 2130 struct elf_or1k_link_hash_table *htab; 2131 struct elf_or1k_link_hash_entry *eh; 2132 struct elf_or1k_dyn_relocs *p; 2133 2134 if (h->root.type == bfd_link_hash_indirect) 2135 return TRUE; 2136 2137 info = (struct bfd_link_info *) inf; 2138 htab = or1k_elf_hash_table (info); 2139 if (htab == NULL) 2140 return FALSE; 2141 2142 eh = (struct elf_or1k_link_hash_entry *) h; 2143 2144 if (htab->root.dynamic_sections_created 2145 && h->plt.refcount > 0) 2146 { 2147 /* Make sure this symbol is output as a dynamic symbol. 2148 Undefined weak syms won't yet be marked as dynamic. */ 2149 if (h->dynindx == -1 2150 && !h->forced_local) 2151 { 2152 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2153 return FALSE; 2154 } 2155 2156 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) 2157 { 2158 asection *s = htab->root.splt; 2159 2160 /* If this is the first .plt entry, make room for the special 2161 first entry. */ 2162 if (s->size == 0) 2163 s->size = PLT_ENTRY_SIZE; 2164 2165 h->plt.offset = s->size; 2166 2167 /* If this symbol is not defined in a regular file, and we are 2168 not generating a shared library, then set the symbol to this 2169 location in the .plt. This is required to make function 2170 pointers compare as equal between the normal executable and 2171 the shared library. */ 2172 if (! bfd_link_pic (info) 2173 && !h->def_regular) 2174 { 2175 h->root.u.def.section = s; 2176 h->root.u.def.value = h->plt.offset; 2177 } 2178 2179 /* Make room for this entry. */ 2180 s->size += PLT_ENTRY_SIZE; 2181 2182 /* We also need to make an entry in the .got.plt section, which 2183 will be placed in the .got section by the linker script. */ 2184 htab->root.sgotplt->size += 4; 2185 2186 /* We also need to make an entry in the .rel.plt section. */ 2187 htab->root.srelplt->size += sizeof (Elf32_External_Rela); 2188 } 2189 else 2190 { 2191 h->plt.offset = (bfd_vma) -1; 2192 h->needs_plt = 0; 2193 } 2194 } 2195 else 2196 { 2197 h->plt.offset = (bfd_vma) -1; 2198 h->needs_plt = 0; 2199 } 2200 2201 if (h->got.refcount > 0) 2202 { 2203 asection *s; 2204 bfd_boolean dyn; 2205 unsigned char tls_type; 2206 2207 /* Make sure this symbol is output as a dynamic symbol. 2208 Undefined weak syms won't yet be marked as dynamic. */ 2209 if (h->dynindx == -1 2210 && !h->forced_local) 2211 { 2212 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2213 return FALSE; 2214 } 2215 2216 s = htab->root.sgot; 2217 2218 h->got.offset = s->size; 2219 2220 tls_type = ((struct elf_or1k_link_hash_entry *) h)->tls_type; 2221 2222 /* TLS GD requires two GOT and two relocs. */ 2223 if (tls_type == TLS_GD) 2224 s->size += 8; 2225 else 2226 s->size += 4; 2227 dyn = htab->root.dynamic_sections_created; 2228 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)) 2229 { 2230 if (tls_type == TLS_GD) 2231 htab->root.srelgot->size += 2 * sizeof (Elf32_External_Rela); 2232 else 2233 htab->root.srelgot->size += sizeof (Elf32_External_Rela); 2234 } 2235 } 2236 else 2237 h->got.offset = (bfd_vma) -1; 2238 2239 if (eh->dyn_relocs == NULL) 2240 return TRUE; 2241 2242 /* In the shared -Bsymbolic case, discard space allocated for 2243 dynamic pc-relative relocs against symbols which turn out to be 2244 defined in regular objects. For the normal shared case, discard 2245 space for pc-relative relocs that have become local due to symbol 2246 visibility changes. */ 2247 2248 if (bfd_link_pic (info)) 2249 { 2250 if (SYMBOL_CALLS_LOCAL (info, h)) 2251 { 2252 struct elf_or1k_dyn_relocs **pp; 2253 2254 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;) 2255 { 2256 p->count -= p->pc_count; 2257 p->pc_count = 0; 2258 if (p->count == 0) 2259 *pp = p->next; 2260 else 2261 pp = &p->next; 2262 } 2263 } 2264 2265 /* Also discard relocs on undefined weak syms with non-default 2266 visibility. */ 2267 if (eh->dyn_relocs != NULL 2268 && h->root.type == bfd_link_hash_undefweak) 2269 { 2270 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 2271 eh->dyn_relocs = NULL; 2272 2273 /* Make sure undefined weak symbols are output as a dynamic 2274 symbol in PIEs. */ 2275 else if (h->dynindx == -1 2276 && !h->forced_local) 2277 { 2278 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2279 return FALSE; 2280 } 2281 } 2282 } 2283 else 2284 { 2285 /* For the non-shared case, discard space for relocs against 2286 symbols which turn out to need copy relocs or are not 2287 dynamic. */ 2288 2289 if (!h->non_got_ref 2290 && ((h->def_dynamic 2291 && !h->def_regular) 2292 || (htab->root.dynamic_sections_created 2293 && (h->root.type == bfd_link_hash_undefweak 2294 || h->root.type == bfd_link_hash_undefined)))) 2295 { 2296 /* Make sure this symbol is output as a dynamic symbol. 2297 Undefined weak syms won't yet be marked as dynamic. */ 2298 if (h->dynindx == -1 2299 && !h->forced_local) 2300 { 2301 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2302 return FALSE; 2303 } 2304 2305 /* If that succeeded, we know we'll be keeping all the 2306 relocs. */ 2307 if (h->dynindx != -1) 2308 goto keep; 2309 } 2310 2311 eh->dyn_relocs = NULL; 2312 2313 keep: ; 2314 } 2315 2316 /* Finally, allocate space. */ 2317 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2318 { 2319 asection *sreloc = elf_section_data (p->sec)->sreloc; 2320 sreloc->size += p->count * sizeof (Elf32_External_Rela); 2321 } 2322 2323 return TRUE; 2324 } 2325 2326 /* Find any dynamic relocs that apply to read-only sections. */ 2327 2328 static bfd_boolean 2329 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) 2330 { 2331 struct elf_or1k_link_hash_entry *eh; 2332 struct elf_or1k_dyn_relocs *p; 2333 2334 eh = (struct elf_or1k_link_hash_entry *) h; 2335 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2336 { 2337 asection *s = p->sec->output_section; 2338 2339 if (s != NULL && (s->flags & SEC_READONLY) != 0) 2340 { 2341 struct bfd_link_info *info = (struct bfd_link_info *) inf; 2342 2343 info->flags |= DF_TEXTREL; 2344 2345 /* Not an error, just cut short the traversal. */ 2346 return FALSE; 2347 } 2348 } 2349 return TRUE; 2350 } 2351 2352 /* Set the sizes of the dynamic sections. */ 2353 2354 static bfd_boolean 2355 or1k_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 2356 struct bfd_link_info *info) 2357 { 2358 struct elf_or1k_link_hash_table *htab; 2359 bfd *dynobj; 2360 asection *s; 2361 bfd_boolean relocs; 2362 bfd *ibfd; 2363 2364 htab = or1k_elf_hash_table (info); 2365 if (htab == NULL) 2366 return FALSE; 2367 2368 dynobj = htab->root.dynobj; 2369 BFD_ASSERT (dynobj != NULL); 2370 2371 if (htab->root.dynamic_sections_created) 2372 { 2373 /* Set the contents of the .interp section to the interpreter. */ 2374 if (bfd_link_executable (info) && !info->nointerp) 2375 { 2376 s = bfd_get_section_by_name (dynobj, ".interp"); 2377 BFD_ASSERT (s != NULL); 2378 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 2379 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 2380 } 2381 } 2382 2383 /* Set up .got offsets for local syms, and space for local dynamic 2384 relocs. */ 2385 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 2386 { 2387 bfd_signed_vma *local_got; 2388 bfd_signed_vma *end_local_got; 2389 bfd_size_type locsymcount; 2390 Elf_Internal_Shdr *symtab_hdr; 2391 unsigned char *local_tls_type; 2392 asection *srel; 2393 2394 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 2395 continue; 2396 2397 for (s = ibfd->sections; s != NULL; s = s->next) 2398 { 2399 struct elf_or1k_dyn_relocs *p; 2400 2401 for (p = ((struct elf_or1k_dyn_relocs *) 2402 elf_section_data (s)->local_dynrel); 2403 p != NULL; 2404 p = p->next) 2405 { 2406 if (! bfd_is_abs_section (p->sec) 2407 && bfd_is_abs_section (p->sec->output_section)) 2408 { 2409 /* Input section has been discarded, either because 2410 it is a copy of a linkonce section or due to 2411 linker script /DISCARD/, so we'll be discarding 2412 the relocs too. */ 2413 } 2414 else if (p->count != 0) 2415 { 2416 srel = elf_section_data (p->sec)->sreloc; 2417 srel->size += p->count * sizeof (Elf32_External_Rela); 2418 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2419 info->flags |= DF_TEXTREL; 2420 } 2421 } 2422 } 2423 2424 local_got = elf_local_got_refcounts (ibfd); 2425 if (!local_got) 2426 continue; 2427 2428 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2429 locsymcount = symtab_hdr->sh_info; 2430 end_local_got = local_got + locsymcount; 2431 s = htab->root.sgot; 2432 srel = htab->root.srelgot; 2433 local_tls_type = (unsigned char *) elf_or1k_local_tls_type (ibfd); 2434 for (; local_got < end_local_got; ++local_got) 2435 { 2436 if (*local_got > 0) 2437 { 2438 *local_got = s->size; 2439 2440 /* TLS GD requires two GOT and two relocs. */ 2441 if (local_tls_type != NULL && *local_tls_type == TLS_GD) 2442 s->size += 8; 2443 else 2444 s->size += 4; 2445 if (bfd_link_pic (info)) 2446 { 2447 if (local_tls_type != NULL && *local_tls_type == TLS_GD) 2448 srel->size += 2 * sizeof (Elf32_External_Rela); 2449 else 2450 srel->size += sizeof (Elf32_External_Rela); 2451 } 2452 } 2453 else 2454 2455 *local_got = (bfd_vma) -1; 2456 2457 if (local_tls_type) 2458 ++local_tls_type; 2459 } 2460 } 2461 2462 /* Allocate global sym .plt and .got entries, and space for global 2463 sym dynamic relocs. */ 2464 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info); 2465 2466 /* We now have determined the sizes of the various dynamic sections. 2467 Allocate memory for them. */ 2468 relocs = FALSE; 2469 for (s = dynobj->sections; s != NULL; s = s->next) 2470 { 2471 if ((s->flags & SEC_LINKER_CREATED) == 0) 2472 continue; 2473 2474 if (s == htab->root.splt 2475 || s == htab->root.sgot 2476 || s == htab->root.sgotplt 2477 || s == htab->root.sdynbss 2478 || s == htab->root.sdynrelro) 2479 { 2480 /* Strip this section if we don't need it; see the 2481 comment below. */ 2482 } 2483 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) 2484 { 2485 if (s->size != 0 && s != htab->root.srelplt) 2486 relocs = TRUE; 2487 2488 /* We use the reloc_count field as a counter if we need 2489 to copy relocs into the output file. */ 2490 s->reloc_count = 0; 2491 } 2492 else 2493 /* It's not one of our sections, so don't allocate space. */ 2494 continue; 2495 2496 if (s->size == 0) 2497 { 2498 /* If we don't need this section, strip it from the 2499 output file. This is mostly to handle .rela.bss and 2500 .rela.plt. We must create both sections in 2501 create_dynamic_sections, because they must be created 2502 before the linker maps input sections to output 2503 sections. The linker does that before 2504 adjust_dynamic_symbol is called, and it is that 2505 function which decides whether anything needs to go 2506 into these sections. */ 2507 s->flags |= SEC_EXCLUDE; 2508 continue; 2509 } 2510 2511 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2512 continue; 2513 2514 /* Allocate memory for the section contents. We use bfd_zalloc 2515 here in case unused entries are not reclaimed before the 2516 section's contents are written out. This should not happen, 2517 but this way if it does, we get a R_OR1K_NONE reloc instead 2518 of garbage. */ 2519 s->contents = bfd_zalloc (dynobj, s->size); 2520 2521 if (s->contents == NULL) 2522 return FALSE; 2523 } 2524 2525 if (htab->root.dynamic_sections_created) 2526 { 2527 /* Add some entries to the .dynamic section. We fill in the 2528 values later, in or1k_elf_finish_dynamic_sections, but we 2529 must add the entries now so that we get the correct size for 2530 the .dynamic section. The DT_DEBUG entry is filled in by the 2531 dynamic linker and used by the debugger. */ 2532 #define add_dynamic_entry(TAG, VAL) \ 2533 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2534 2535 if (bfd_link_executable (info)) 2536 { 2537 if (! add_dynamic_entry (DT_DEBUG, 0)) 2538 return FALSE; 2539 } 2540 2541 if (htab->root.splt->size != 0) 2542 { 2543 if (! add_dynamic_entry (DT_PLTGOT, 0) 2544 || ! add_dynamic_entry (DT_PLTRELSZ, 0) 2545 || ! add_dynamic_entry (DT_PLTREL, DT_RELA) 2546 || ! add_dynamic_entry (DT_JMPREL, 0)) 2547 return FALSE; 2548 } 2549 2550 if (relocs) 2551 { 2552 if (! add_dynamic_entry (DT_RELA, 0) 2553 || ! add_dynamic_entry (DT_RELASZ, 0) 2554 || ! add_dynamic_entry (DT_RELAENT, 2555 sizeof (Elf32_External_Rela))) 2556 return FALSE; 2557 2558 /* If any dynamic relocs apply to a read-only section, 2559 then we need a DT_TEXTREL entry. */ 2560 if ((info->flags & DF_TEXTREL) == 0) 2561 elf_link_hash_traverse (&htab->root, readonly_dynrelocs, 2562 info); 2563 2564 if ((info->flags & DF_TEXTREL) != 0) 2565 { 2566 if (! add_dynamic_entry (DT_TEXTREL, 0)) 2567 return FALSE; 2568 } 2569 } 2570 } 2571 2572 #undef add_dynamic_entry 2573 return TRUE; 2574 } 2575 2576 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 2577 2578 static void 2579 or1k_elf_copy_indirect_symbol (struct bfd_link_info *info, 2580 struct elf_link_hash_entry *dir, 2581 struct elf_link_hash_entry *ind) 2582 { 2583 struct elf_or1k_link_hash_entry * edir; 2584 struct elf_or1k_link_hash_entry * eind; 2585 2586 edir = (struct elf_or1k_link_hash_entry *) dir; 2587 eind = (struct elf_or1k_link_hash_entry *) ind; 2588 2589 if (eind->dyn_relocs != NULL) 2590 { 2591 if (edir->dyn_relocs != NULL) 2592 { 2593 struct elf_or1k_dyn_relocs **pp; 2594 struct elf_or1k_dyn_relocs *p; 2595 2596 /* Add reloc counts against the indirect sym to the direct sym 2597 list. Merge any entries against the same section. */ 2598 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) 2599 { 2600 struct elf_or1k_dyn_relocs *q; 2601 2602 for (q = edir->dyn_relocs; q != NULL; q = q->next) 2603 if (q->sec == p->sec) 2604 { 2605 q->pc_count += p->pc_count; 2606 q->count += p->count; 2607 *pp = p->next; 2608 break; 2609 } 2610 if (q == NULL) 2611 pp = &p->next; 2612 } 2613 *pp = edir->dyn_relocs; 2614 } 2615 2616 edir->dyn_relocs = eind->dyn_relocs; 2617 eind->dyn_relocs = NULL; 2618 } 2619 2620 if (ind->root.type == bfd_link_hash_indirect) 2621 { 2622 if (dir->got.refcount <= 0) 2623 { 2624 edir->tls_type = eind->tls_type; 2625 eind->tls_type = TLS_UNKNOWN; 2626 } 2627 } 2628 2629 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 2630 } 2631 2632 /* Set the right machine number. */ 2633 2634 static bfd_boolean 2635 or1k_elf_object_p (bfd *abfd) 2636 { 2637 unsigned long mach = bfd_mach_or1k; 2638 2639 if (elf_elfheader (abfd)->e_flags & EF_OR1K_NODELAY) 2640 mach = bfd_mach_or1knd; 2641 2642 return bfd_default_set_arch_mach (abfd, bfd_arch_or1k, mach); 2643 } 2644 2645 /* Store the machine number in the flags field. */ 2646 2647 static void 2648 or1k_elf_final_write_processing (bfd *abfd, 2649 bfd_boolean linker ATTRIBUTE_UNUSED) 2650 { 2651 switch (bfd_get_mach (abfd)) 2652 { 2653 default: 2654 case bfd_mach_or1k: 2655 break; 2656 case bfd_mach_or1knd: 2657 elf_elfheader (abfd)->e_flags |= EF_OR1K_NODELAY; 2658 break; 2659 } 2660 } 2661 2662 static bfd_boolean 2663 or1k_elf_set_private_flags (bfd *abfd, flagword flags) 2664 { 2665 BFD_ASSERT (!elf_flags_init (abfd) 2666 || elf_elfheader (abfd)->e_flags == flags); 2667 2668 elf_elfheader (abfd)->e_flags = flags; 2669 elf_flags_init (abfd) = TRUE; 2670 return TRUE; 2671 } 2672 2673 /* Make sure all input files are consistent with respect to 2674 EF_OR1K_NODELAY flag setting. */ 2675 2676 static bfd_boolean 2677 elf32_or1k_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 2678 { 2679 bfd *obfd = info->output_bfd; 2680 flagword out_flags; 2681 flagword in_flags; 2682 2683 in_flags = elf_elfheader (ibfd)->e_flags; 2684 out_flags = elf_elfheader (obfd)->e_flags; 2685 2686 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 2687 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 2688 return TRUE; 2689 2690 if (!elf_flags_init (obfd)) 2691 { 2692 elf_flags_init (obfd) = TRUE; 2693 elf_elfheader (obfd)->e_flags = in_flags; 2694 2695 return TRUE; 2696 } 2697 2698 if (in_flags == out_flags) 2699 return TRUE; 2700 2701 if ((in_flags & EF_OR1K_NODELAY) != (out_flags & EF_OR1K_NODELAY)) 2702 { 2703 _bfd_error_handler 2704 (_("%B: EF_OR1K_NODELAY flag mismatch with previous modules"), ibfd); 2705 2706 bfd_set_error (bfd_error_bad_value); 2707 return FALSE; 2708 } 2709 2710 return TRUE; 2711 2712 } 2713 2714 #define ELF_ARCH bfd_arch_or1k 2715 #define ELF_MACHINE_CODE EM_OR1K 2716 #define ELF_TARGET_ID OR1K_ELF_DATA 2717 #define ELF_MAXPAGESIZE 0x2000 2718 2719 #define TARGET_BIG_SYM or1k_elf32_vec 2720 #define TARGET_BIG_NAME "elf32-or1k" 2721 2722 #define elf_info_to_howto_rel NULL 2723 #define elf_info_to_howto or1k_info_to_howto_rela 2724 #define elf_backend_relocate_section or1k_elf_relocate_section 2725 #define elf_backend_gc_mark_hook or1k_elf_gc_mark_hook 2726 #define elf_backend_gc_sweep_hook or1k_elf_gc_sweep_hook 2727 #define elf_backend_check_relocs or1k_elf_check_relocs 2728 #define elf_backend_reloc_type_class or1k_elf_reloc_type_class 2729 #define elf_backend_can_gc_sections 1 2730 #define elf_backend_rela_normal 1 2731 2732 #define bfd_elf32_mkobject elf_or1k_mkobject 2733 2734 #define bfd_elf32_bfd_merge_private_bfd_data elf32_or1k_merge_private_bfd_data 2735 #define bfd_elf32_bfd_set_private_flags or1k_elf_set_private_flags 2736 #define bfd_elf32_bfd_reloc_type_lookup or1k_reloc_type_lookup 2737 #define bfd_elf32_bfd_reloc_name_lookup or1k_reloc_name_lookup 2738 2739 #define elf_backend_object_p or1k_elf_object_p 2740 #define elf_backend_final_write_processing or1k_elf_final_write_processing 2741 #define elf_backend_can_refcount 1 2742 2743 #define elf_backend_plt_readonly 1 2744 #define elf_backend_want_got_plt 1 2745 #define elf_backend_want_plt_sym 0 2746 #define elf_backend_got_header_size 12 2747 #define elf_backend_dtrel_excludes_plt 1 2748 #define elf_backend_want_dynrelro 1 2749 2750 #define bfd_elf32_bfd_link_hash_table_create or1k_elf_link_hash_table_create 2751 #define elf_backend_copy_indirect_symbol or1k_elf_copy_indirect_symbol 2752 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections 2753 #define elf_backend_finish_dynamic_sections or1k_elf_finish_dynamic_sections 2754 #define elf_backend_size_dynamic_sections or1k_elf_size_dynamic_sections 2755 #define elf_backend_adjust_dynamic_symbol or1k_elf_adjust_dynamic_symbol 2756 #define elf_backend_finish_dynamic_symbol or1k_elf_finish_dynamic_symbol 2757 2758 #include "elf32-target.h" 2759
Indexes created Tue Apr 07 00:22:49 UTC 2026