1/* MIPS-specific support for 32-bit ELF 2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 3 2003, 2004, 2005, 2007 Free Software Foundation, Inc. 4 5 Most of the information added by Ian Lance Taylor, Cygnus Support, 6 <ian@cygnus.com>. 7 N32/64 ABI support added by Mark Mitchell, CodeSourcery, LLC. 8 <mark@codesourcery.com> 9 Traditional MIPS targets support added by Koundinya.K, Dansk Data 10 Elektronik & Operations Research Group. <kk@ddeorg.soft.net> 11 12This file is part of BFD, the Binary File Descriptor library. 13 14This program is free software; you can redistribute it and/or modify 15it under the terms of the GNU General Public License as published by 16the Free Software Foundation; either version 2 of the License, or 17(at your option) any later version. 18 19This program is distributed in the hope that it will be useful, 20but WITHOUT ANY WARRANTY; without even the implied warranty of 21MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22GNU General Public License for more details. 23 24You should have received a copy of the GNU General Public License 25along with this program; if not, write to the Free Software 26Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 27 28/* This file handles MIPS ELF targets. SGI Irix 5 uses a slightly 29 different MIPS ELF from other targets. This matters when linking. 30 This file supports both, switching at runtime. */ 31 32#include "sysdep.h" 33#include "bfd.h" 34#include "libbfd.h" 35#include "bfdlink.h" 36#include "genlink.h" 37#include "elf-bfd.h" 38#include "elfxx-mips.h" 39#include "elf/mips.h" 40#include "elf-vxworks.h" 41 42/* Get the ECOFF swapping routines. */ 43#include "coff/sym.h" 44#include "coff/symconst.h" 45#include "coff/internal.h" 46#include "coff/ecoff.h" 47#include "coff/mips.h" 48#define ECOFF_SIGNED_32 49#include "ecoffswap.h" 50 51static bfd_reloc_status_type gprel32_with_gp 52 (bfd *, asymbol *, arelent *, asection *, bfd_boolean, void *, bfd_vma); 53static bfd_reloc_status_type mips_elf_gprel32_reloc 54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 55static bfd_reloc_status_type mips32_64bit_reloc 56 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 57static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup 58 (bfd *, bfd_reloc_code_real_type); 59static reloc_howto_type *mips_elf32_rtype_to_howto 60 (unsigned int, bfd_boolean); 61static void mips_info_to_howto_rel 62 (bfd *, arelent *, Elf_Internal_Rela *); 63static void mips_info_to_howto_rela 64 (bfd *, arelent *, Elf_Internal_Rela *); 65static bfd_boolean mips_elf_sym_is_global 66 (bfd *, asymbol *); 67static bfd_boolean mips_elf32_object_p 68 (bfd *); 69static bfd_boolean mips_elf_is_local_label_name 70 (bfd *, const char *); 71static bfd_reloc_status_type mips16_gprel_reloc 72 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 73static bfd_reloc_status_type mips_elf_final_gp 74 (bfd *, asymbol *, bfd_boolean, char **, bfd_vma *); 75static bfd_boolean mips_elf_assign_gp 76 (bfd *, bfd_vma *); 77static bfd_boolean elf32_mips_grok_prstatus 78 (bfd *, Elf_Internal_Note *); 79static bfd_boolean elf32_mips_grok_psinfo 80 (bfd *, Elf_Internal_Note *); 81static irix_compat_t elf32_mips_irix_compat 82 (bfd *); 83 84extern const bfd_target bfd_elf32_bigmips_vec; 85extern const bfd_target bfd_elf32_littlemips_vec; 86 87/* Nonzero if ABFD is using the N32 ABI. */ 88#define ABI_N32_P(abfd) \ 89 ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI2) != 0) 90 91/* Whether we are trying to be compatible with IRIX at all. */ 92#define SGI_COMPAT(abfd) \ 93 (elf32_mips_irix_compat (abfd) != ict_none) 94 95/* The number of local .got entries we reserve. */ 96#define MIPS_RESERVED_GOTNO (2) 97 98/* In case we're on a 32-bit machine, construct a 64-bit "-1" value 99 from smaller values. Start with zero, widen, *then* decrement. */ 100#define MINUS_ONE (((bfd_vma)0) - 1) 101 102/* The relocation table used for SHT_REL sections. */ 103 104static reloc_howto_type elf_mips_howto_table_rel[] = 105{ 106 /* No relocation. */ 107 HOWTO (R_MIPS_NONE, /* type */ 108 0, /* rightshift */ 109 0, /* size (0 = byte, 1 = short, 2 = long) */ 110 0, /* bitsize */ 111 FALSE, /* pc_relative */ 112 0, /* bitpos */ 113 complain_overflow_dont, /* complain_on_overflow */ 114 _bfd_mips_elf_generic_reloc, /* special_function */ 115 "R_MIPS_NONE", /* name */ 116 FALSE, /* partial_inplace */ 117 0, /* src_mask */ 118 0, /* dst_mask */ 119 FALSE), /* pcrel_offset */ 120 121 /* 16 bit relocation. */ 122 HOWTO (R_MIPS_16, /* type */ 123 0, /* rightshift */ 124 2, /* size (0 = byte, 1 = short, 2 = long) */ 125 16, /* bitsize */ 126 FALSE, /* pc_relative */ 127 0, /* bitpos */ 128 complain_overflow_signed, /* complain_on_overflow */ 129 _bfd_mips_elf_generic_reloc, /* special_function */ 130 "R_MIPS_16", /* name */ 131 TRUE, /* partial_inplace */ 132 0x0000ffff, /* src_mask */ 133 0x0000ffff, /* dst_mask */ 134 FALSE), /* pcrel_offset */ 135 136 /* 32 bit relocation. */ 137 HOWTO (R_MIPS_32, /* type */ 138 0, /* rightshift */ 139 2, /* size (0 = byte, 1 = short, 2 = long) */ 140 32, /* bitsize */ 141 FALSE, /* pc_relative */ 142 0, /* bitpos */ 143 complain_overflow_dont, /* complain_on_overflow */ 144 _bfd_mips_elf_generic_reloc, /* special_function */ 145 "R_MIPS_32", /* name */ 146 TRUE, /* partial_inplace */ 147 0xffffffff, /* src_mask */ 148 0xffffffff, /* dst_mask */ 149 FALSE), /* pcrel_offset */ 150 151 /* 32 bit symbol relative relocation. */ 152 HOWTO (R_MIPS_REL32, /* type */ 153 0, /* rightshift */ 154 2, /* size (0 = byte, 1 = short, 2 = long) */ 155 32, /* bitsize */ 156 FALSE, /* pc_relative */ 157 0, /* bitpos */ 158 complain_overflow_dont, /* complain_on_overflow */ 159 _bfd_mips_elf_generic_reloc, /* special_function */ 160 "R_MIPS_REL32", /* name */ 161 TRUE, /* partial_inplace */ 162 0xffffffff, /* src_mask */ 163 0xffffffff, /* dst_mask */ 164 FALSE), /* pcrel_offset */ 165 166 /* 26 bit jump address. */ 167 HOWTO (R_MIPS_26, /* type */ 168 2, /* rightshift */ 169 2, /* size (0 = byte, 1 = short, 2 = long) */ 170 26, /* bitsize */ 171 FALSE, /* pc_relative */ 172 0, /* bitpos */ 173 complain_overflow_dont, /* complain_on_overflow */ 174 /* This needs complex overflow 175 detection, because the upper four 176 bits must match the PC + 4. */ 177 _bfd_mips_elf_generic_reloc, /* special_function */ 178 "R_MIPS_26", /* name */ 179 TRUE, /* partial_inplace */ 180 0x03ffffff, /* src_mask */ 181 0x03ffffff, /* dst_mask */ 182 FALSE), /* pcrel_offset */ 183 184 /* High 16 bits of symbol value. */ 185 HOWTO (R_MIPS_HI16, /* type */ 186 16, /* rightshift */ 187 2, /* size (0 = byte, 1 = short, 2 = long) */ 188 16, /* bitsize */ 189 FALSE, /* pc_relative */ 190 0, /* bitpos */ 191 complain_overflow_dont, /* complain_on_overflow */ 192 _bfd_mips_elf_hi16_reloc, /* special_function */ 193 "R_MIPS_HI16", /* name */ 194 TRUE, /* partial_inplace */ 195 0x0000ffff, /* src_mask */ 196 0x0000ffff, /* dst_mask */ 197 FALSE), /* pcrel_offset */ 198 199 /* Low 16 bits of symbol value. */ 200 HOWTO (R_MIPS_LO16, /* type */ 201 0, /* rightshift */ 202 2, /* size (0 = byte, 1 = short, 2 = long) */ 203 16, /* bitsize */ 204 FALSE, /* pc_relative */ 205 0, /* bitpos */ 206 complain_overflow_dont, /* complain_on_overflow */ 207 _bfd_mips_elf_lo16_reloc, /* special_function */ 208 "R_MIPS_LO16", /* name */ 209 TRUE, /* partial_inplace */ 210 0x0000ffff, /* src_mask */ 211 0x0000ffff, /* dst_mask */ 212 FALSE), /* pcrel_offset */ 213 214 /* GP relative reference. */ 215 HOWTO (R_MIPS_GPREL16, /* type */ 216 0, /* rightshift */ 217 2, /* size (0 = byte, 1 = short, 2 = long) */ 218 16, /* bitsize */ 219 FALSE, /* pc_relative */ 220 0, /* bitpos */ 221 complain_overflow_signed, /* complain_on_overflow */ 222 _bfd_mips_elf32_gprel16_reloc, /* special_function */ 223 "R_MIPS_GPREL16", /* name */ 224 TRUE, /* partial_inplace */ 225 0x0000ffff, /* src_mask */ 226 0x0000ffff, /* dst_mask */ 227 FALSE), /* pcrel_offset */ 228 229 /* Reference to literal section. */ 230 HOWTO (R_MIPS_LITERAL, /* type */ 231 0, /* rightshift */ 232 2, /* size (0 = byte, 1 = short, 2 = long) */ 233 16, /* bitsize */ 234 FALSE, /* pc_relative */ 235 0, /* bitpos */ 236 complain_overflow_signed, /* complain_on_overflow */ 237 _bfd_mips_elf32_gprel16_reloc, /* special_function */ 238 "R_MIPS_LITERAL", /* name */ 239 TRUE, /* partial_inplace */ 240 0x0000ffff, /* src_mask */ 241 0x0000ffff, /* dst_mask */ 242 FALSE), /* pcrel_offset */ 243 244 /* Reference to global offset table. */ 245 HOWTO (R_MIPS_GOT16, /* type */ 246 0, /* rightshift */ 247 2, /* size (0 = byte, 1 = short, 2 = long) */ 248 16, /* bitsize */ 249 FALSE, /* pc_relative */ 250 0, /* bitpos */ 251 complain_overflow_signed, /* complain_on_overflow */ 252 _bfd_mips_elf_got16_reloc, /* special_function */ 253 "R_MIPS_GOT16", /* name */ 254 TRUE, /* partial_inplace */ 255 0x0000ffff, /* src_mask */ 256 0x0000ffff, /* dst_mask */ 257 FALSE), /* pcrel_offset */ 258 259 /* 16 bit PC relative reference. Note that the ABI document has a typo 260 and claims R_MIPS_PC16 to be not rightshifted, rendering it useless. 261 We do the right thing here. */ 262 HOWTO (R_MIPS_PC16, /* type */ 263 2, /* rightshift */ 264 2, /* size (0 = byte, 1 = short, 2 = long) */ 265 16, /* bitsize */ 266 TRUE, /* pc_relative */ 267 0, /* bitpos */ 268 complain_overflow_signed, /* complain_on_overflow */ 269 _bfd_mips_elf_generic_reloc, /* special_function */ 270 "R_MIPS_PC16", /* name */ 271 TRUE, /* partial_inplace */ 272 0x0000ffff, /* src_mask */ 273 0x0000ffff, /* dst_mask */ 274 TRUE), /* pcrel_offset */ 275 276 /* 16 bit call through global offset table. */ 277 HOWTO (R_MIPS_CALL16, /* type */ 278 0, /* rightshift */ 279 2, /* size (0 = byte, 1 = short, 2 = long) */ 280 16, /* bitsize */ 281 FALSE, /* pc_relative */ 282 0, /* bitpos */ 283 complain_overflow_signed, /* complain_on_overflow */ 284 _bfd_mips_elf_generic_reloc, /* special_function */ 285 "R_MIPS_CALL16", /* name */ 286 TRUE, /* partial_inplace */ 287 0x0000ffff, /* src_mask */ 288 0x0000ffff, /* dst_mask */ 289 FALSE), /* pcrel_offset */ 290 291 /* 32 bit GP relative reference. */ 292 HOWTO (R_MIPS_GPREL32, /* type */ 293 0, /* rightshift */ 294 2, /* size (0 = byte, 1 = short, 2 = long) */ 295 32, /* bitsize */ 296 FALSE, /* pc_relative */ 297 0, /* bitpos */ 298 complain_overflow_dont, /* complain_on_overflow */ 299 mips_elf_gprel32_reloc, /* special_function */ 300 "R_MIPS_GPREL32", /* name */ 301 TRUE, /* partial_inplace */ 302 0xffffffff, /* src_mask */ 303 0xffffffff, /* dst_mask */ 304 FALSE), /* pcrel_offset */ 305 306 /* The remaining relocs are defined on Irix 5, although they are 307 not defined by the ABI. */ 308 EMPTY_HOWTO (13), 309 EMPTY_HOWTO (14), 310 EMPTY_HOWTO (15), 311 312 /* A 5 bit shift field. */ 313 HOWTO (R_MIPS_SHIFT5, /* type */ 314 0, /* rightshift */ 315 2, /* size (0 = byte, 1 = short, 2 = long) */ 316 5, /* bitsize */ 317 FALSE, /* pc_relative */ 318 6, /* bitpos */ 319 complain_overflow_bitfield, /* complain_on_overflow */ 320 _bfd_mips_elf_generic_reloc, /* special_function */ 321 "R_MIPS_SHIFT5", /* name */ 322 TRUE, /* partial_inplace */ 323 0x000007c0, /* src_mask */ 324 0x000007c0, /* dst_mask */ 325 FALSE), /* pcrel_offset */ 326 327 /* A 6 bit shift field. */ 328 /* FIXME: This is not handled correctly; a special function is 329 needed to put the most significant bit in the right place. */ 330 HOWTO (R_MIPS_SHIFT6, /* type */ 331 0, /* rightshift */ 332 2, /* size (0 = byte, 1 = short, 2 = long) */ 333 6, /* bitsize */ 334 FALSE, /* pc_relative */ 335 6, /* bitpos */ 336 complain_overflow_bitfield, /* complain_on_overflow */ 337 _bfd_mips_elf_generic_reloc, /* special_function */ 338 "R_MIPS_SHIFT6", /* name */ 339 TRUE, /* partial_inplace */ 340 0x000007c4, /* src_mask */ 341 0x000007c4, /* dst_mask */ 342 FALSE), /* pcrel_offset */ 343 344 /* A 64 bit relocation. */ 345 HOWTO (R_MIPS_64, /* type */ 346 0, /* rightshift */ 347 4, /* size (0 = byte, 1 = short, 2 = long) */ 348 64, /* bitsize */ 349 FALSE, /* pc_relative */ 350 0, /* bitpos */ 351 complain_overflow_dont, /* complain_on_overflow */ 352 mips32_64bit_reloc, /* special_function */ 353 "R_MIPS_64", /* name */ 354 TRUE, /* partial_inplace */ 355 MINUS_ONE, /* src_mask */ 356 MINUS_ONE, /* dst_mask */ 357 FALSE), /* pcrel_offset */ 358 359 /* Displacement in the global offset table. */ 360 HOWTO (R_MIPS_GOT_DISP, /* type */ 361 0, /* rightshift */ 362 2, /* size (0 = byte, 1 = short, 2 = long) */ 363 16, /* bitsize */ 364 FALSE, /* pc_relative */ 365 0, /* bitpos */ 366 complain_overflow_signed, /* complain_on_overflow */ 367 _bfd_mips_elf_generic_reloc, /* special_function */ 368 "R_MIPS_GOT_DISP", /* name */ 369 TRUE, /* partial_inplace */ 370 0x0000ffff, /* src_mask */ 371 0x0000ffff, /* dst_mask */ 372 FALSE), /* pcrel_offset */ 373 374 /* Displacement to page pointer in the global offset table. */ 375 HOWTO (R_MIPS_GOT_PAGE, /* type */ 376 0, /* rightshift */ 377 2, /* size (0 = byte, 1 = short, 2 = long) */ 378 16, /* bitsize */ 379 FALSE, /* pc_relative */ 380 0, /* bitpos */ 381 complain_overflow_signed, /* complain_on_overflow */ 382 _bfd_mips_elf_generic_reloc, /* special_function */ 383 "R_MIPS_GOT_PAGE", /* name */ 384 TRUE, /* partial_inplace */ 385 0x0000ffff, /* src_mask */ 386 0x0000ffff, /* dst_mask */ 387 FALSE), /* pcrel_offset */ 388 389 /* Offset from page pointer in the global offset table. */ 390 HOWTO (R_MIPS_GOT_OFST, /* type */ 391 0, /* rightshift */ 392 2, /* size (0 = byte, 1 = short, 2 = long) */ 393 16, /* bitsize */ 394 FALSE, /* pc_relative */ 395 0, /* bitpos */ 396 complain_overflow_signed, /* complain_on_overflow */ 397 _bfd_mips_elf_generic_reloc, /* special_function */ 398 "R_MIPS_GOT_OFST", /* name */ 399 TRUE, /* partial_inplace */ 400 0x0000ffff, /* src_mask */ 401 0x0000ffff, /* dst_mask */ 402 FALSE), /* pcrel_offset */ 403 404 /* High 16 bits of displacement in global offset table. */ 405 HOWTO (R_MIPS_GOT_HI16, /* type */ 406 0, /* rightshift */ 407 2, /* size (0 = byte, 1 = short, 2 = long) */ 408 16, /* bitsize */ 409 FALSE, /* pc_relative */ 410 0, /* bitpos */ 411 complain_overflow_dont, /* complain_on_overflow */ 412 _bfd_mips_elf_generic_reloc, /* special_function */ 413 "R_MIPS_GOT_HI16", /* name */ 414 TRUE, /* partial_inplace */ 415 0x0000ffff, /* src_mask */ 416 0x0000ffff, /* dst_mask */ 417 FALSE), /* pcrel_offset */ 418 419 /* Low 16 bits of displacement in global offset table. */ 420 HOWTO (R_MIPS_GOT_LO16, /* type */ 421 0, /* rightshift */ 422 2, /* size (0 = byte, 1 = short, 2 = long) */ 423 16, /* bitsize */ 424 FALSE, /* pc_relative */ 425 0, /* bitpos */ 426 complain_overflow_dont, /* complain_on_overflow */ 427 _bfd_mips_elf_generic_reloc, /* special_function */ 428 "R_MIPS_GOT_LO16", /* name */ 429 TRUE, /* partial_inplace */ 430 0x0000ffff, /* src_mask */ 431 0x0000ffff, /* dst_mask */ 432 FALSE), /* pcrel_offset */ 433 434 /* 64 bit subtraction. Used in the N32 ABI. */ 435 HOWTO (R_MIPS_SUB, /* type */ 436 0, /* rightshift */ 437 4, /* size (0 = byte, 1 = short, 2 = long) */ 438 64, /* bitsize */ 439 FALSE, /* pc_relative */ 440 0, /* bitpos */ 441 complain_overflow_dont, /* complain_on_overflow */ 442 _bfd_mips_elf_generic_reloc, /* special_function */ 443 "R_MIPS_SUB", /* name */ 444 TRUE, /* partial_inplace */ 445 MINUS_ONE, /* src_mask */ 446 MINUS_ONE, /* dst_mask */ 447 FALSE), /* pcrel_offset */ 448 449 /* Used to cause the linker to insert and delete instructions? */ 450 EMPTY_HOWTO (R_MIPS_INSERT_A), 451 EMPTY_HOWTO (R_MIPS_INSERT_B), 452 EMPTY_HOWTO (R_MIPS_DELETE), 453 454 /* Get the higher value of a 64 bit addend. */ 455 HOWTO (R_MIPS_HIGHER, /* type */ 456 0, /* rightshift */ 457 2, /* size (0 = byte, 1 = short, 2 = long) */ 458 16, /* bitsize */ 459 FALSE, /* pc_relative */ 460 0, /* bitpos */ 461 complain_overflow_dont, /* complain_on_overflow */ 462 _bfd_mips_elf_generic_reloc, /* special_function */ 463 "R_MIPS_HIGHER", /* name */ 464 TRUE, /* partial_inplace */ 465 0x0000ffff, /* src_mask */ 466 0x0000ffff, /* dst_mask */ 467 FALSE), /* pcrel_offset */ 468 469 /* Get the highest value of a 64 bit addend. */ 470 HOWTO (R_MIPS_HIGHEST, /* type */ 471 0, /* rightshift */ 472 2, /* size (0 = byte, 1 = short, 2 = long) */ 473 16, /* bitsize */ 474 FALSE, /* pc_relative */ 475 0, /* bitpos */ 476 complain_overflow_dont, /* complain_on_overflow */ 477 _bfd_mips_elf_generic_reloc, /* special_function */ 478 "R_MIPS_HIGHEST", /* name */ 479 TRUE, /* partial_inplace */ 480 0x0000ffff, /* src_mask */ 481 0x0000ffff, /* dst_mask */ 482 FALSE), /* pcrel_offset */ 483 484 /* High 16 bits of displacement in global offset table. */ 485 HOWTO (R_MIPS_CALL_HI16, /* type */ 486 0, /* 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_mips_elf_generic_reloc, /* special_function */ 493 "R_MIPS_CALL_HI16", /* name */ 494 TRUE, /* partial_inplace */ 495 0x0000ffff, /* src_mask */ 496 0x0000ffff, /* dst_mask */ 497 FALSE), /* pcrel_offset */ 498 499 /* Low 16 bits of displacement in global offset table. */ 500 HOWTO (R_MIPS_CALL_LO16, /* type */ 501 0, /* rightshift */ 502 2, /* size (0 = byte, 1 = short, 2 = long) */ 503 16, /* bitsize */ 504 FALSE, /* pc_relative */ 505 0, /* bitpos */ 506 complain_overflow_dont, /* complain_on_overflow */ 507 _bfd_mips_elf_generic_reloc, /* special_function */ 508 "R_MIPS_CALL_LO16", /* name */ 509 TRUE, /* partial_inplace */ 510 0x0000ffff, /* src_mask */ 511 0x0000ffff, /* dst_mask */ 512 FALSE), /* pcrel_offset */ 513 514 /* Section displacement. */ 515 HOWTO (R_MIPS_SCN_DISP, /* type */ 516 0, /* rightshift */ 517 2, /* size (0 = byte, 1 = short, 2 = long) */ 518 32, /* bitsize */ 519 FALSE, /* pc_relative */ 520 0, /* bitpos */ 521 complain_overflow_dont, /* complain_on_overflow */ 522 _bfd_mips_elf_generic_reloc, /* special_function */ 523 "R_MIPS_SCN_DISP", /* name */ 524 TRUE, /* partial_inplace */ 525 0xffffffff, /* src_mask */ 526 0xffffffff, /* dst_mask */ 527 FALSE), /* pcrel_offset */ 528 529 EMPTY_HOWTO (R_MIPS_REL16), 530 EMPTY_HOWTO (R_MIPS_ADD_IMMEDIATE), 531 EMPTY_HOWTO (R_MIPS_PJUMP), 532 EMPTY_HOWTO (R_MIPS_RELGOT), 533 534 /* Protected jump conversion. This is an optimization hint. No 535 relocation is required for correctness. */ 536 HOWTO (R_MIPS_JALR, /* type */ 537 0, /* rightshift */ 538 2, /* size (0 = byte, 1 = short, 2 = long) */ 539 32, /* bitsize */ 540 FALSE, /* pc_relative */ 541 0, /* bitpos */ 542 complain_overflow_dont, /* complain_on_overflow */ 543 _bfd_mips_elf_generic_reloc, /* special_function */ 544 "R_MIPS_JALR", /* name */ 545 FALSE, /* partial_inplace */ 546 0x00000000, /* src_mask */ 547 0x00000000, /* dst_mask */ 548 FALSE), /* pcrel_offset */ 549 550 /* TLS GD/LD dynamic relocations. */ 551 HOWTO (R_MIPS_TLS_DTPMOD32, /* type */ 552 0, /* rightshift */ 553 2, /* size (0 = byte, 1 = short, 2 = long) */ 554 32, /* bitsize */ 555 FALSE, /* pc_relative */ 556 0, /* bitpos */ 557 complain_overflow_dont, /* complain_on_overflow */ 558 _bfd_mips_elf_generic_reloc, /* special_function */ 559 "R_MIPS_TLS_DTPMOD32", /* name */ 560 TRUE, /* partial_inplace */ 561 0xffffffff, /* src_mask */ 562 0xffffffff, /* dst_mask */ 563 FALSE), /* pcrel_offset */ 564 565 HOWTO (R_MIPS_TLS_DTPREL32, /* type */ 566 0, /* rightshift */ 567 2, /* size (0 = byte, 1 = short, 2 = long) */ 568 32, /* bitsize */ 569 FALSE, /* pc_relative */ 570 0, /* bitpos */ 571 complain_overflow_dont, /* complain_on_overflow */ 572 _bfd_mips_elf_generic_reloc, /* special_function */ 573 "R_MIPS_TLS_DTPREL32", /* name */ 574 TRUE, /* partial_inplace */ 575 0xffffffff, /* src_mask */ 576 0xffffffff, /* dst_mask */ 577 FALSE), /* pcrel_offset */ 578 579 EMPTY_HOWTO (R_MIPS_TLS_DTPMOD64), 580 EMPTY_HOWTO (R_MIPS_TLS_DTPREL64), 581 582 /* TLS general dynamic variable reference. */ 583 HOWTO (R_MIPS_TLS_GD, /* type */ 584 0, /* rightshift */ 585 2, /* size (0 = byte, 1 = short, 2 = long) */ 586 16, /* bitsize */ 587 FALSE, /* pc_relative */ 588 0, /* bitpos */ 589 complain_overflow_signed, /* complain_on_overflow */ 590 _bfd_mips_elf_generic_reloc, /* special_function */ 591 "R_MIPS_TLS_GD", /* name */ 592 TRUE, /* partial_inplace */ 593 0x0000ffff, /* src_mask */ 594 0x0000ffff, /* dst_mask */ 595 FALSE), /* pcrel_offset */ 596 597 /* TLS local dynamic variable reference. */ 598 HOWTO (R_MIPS_TLS_LDM, /* type */ 599 0, /* rightshift */ 600 2, /* size (0 = byte, 1 = short, 2 = long) */ 601 16, /* bitsize */ 602 FALSE, /* pc_relative */ 603 0, /* bitpos */ 604 complain_overflow_signed, /* complain_on_overflow */ 605 _bfd_mips_elf_generic_reloc, /* special_function */ 606 "R_MIPS_TLS_LDM", /* name */ 607 TRUE, /* partial_inplace */ 608 0x0000ffff, /* src_mask */ 609 0x0000ffff, /* dst_mask */ 610 FALSE), /* pcrel_offset */ 611 612 /* TLS local dynamic offset. */ 613 HOWTO (R_MIPS_TLS_DTPREL_HI16, /* type */ 614 0, /* rightshift */ 615 2, /* size (0 = byte, 1 = short, 2 = long) */ 616 16, /* bitsize */ 617 FALSE, /* pc_relative */ 618 0, /* bitpos */ 619 complain_overflow_signed, /* complain_on_overflow */ 620 _bfd_mips_elf_generic_reloc, /* special_function */ 621 "R_MIPS_TLS_DTPREL_HI16", /* name */ 622 TRUE, /* partial_inplace */ 623 0x0000ffff, /* src_mask */ 624 0x0000ffff, /* dst_mask */ 625 FALSE), /* pcrel_offset */ 626 627 /* TLS local dynamic offset. */ 628 HOWTO (R_MIPS_TLS_DTPREL_LO16, /* type */ 629 0, /* rightshift */ 630 2, /* size (0 = byte, 1 = short, 2 = long) */ 631 16, /* bitsize */ 632 FALSE, /* pc_relative */ 633 0, /* bitpos */ 634 complain_overflow_signed, /* complain_on_overflow */ 635 _bfd_mips_elf_generic_reloc, /* special_function */ 636 "R_MIPS_TLS_DTPREL_LO16", /* name */ 637 TRUE, /* partial_inplace */ 638 0x0000ffff, /* src_mask */ 639 0x0000ffff, /* dst_mask */ 640 FALSE), /* pcrel_offset */ 641 642 /* TLS thread pointer offset. */ 643 HOWTO (R_MIPS_TLS_GOTTPREL, /* type */ 644 0, /* rightshift */ 645 2, /* size (0 = byte, 1 = short, 2 = long) */ 646 16, /* bitsize */ 647 FALSE, /* pc_relative */ 648 0, /* bitpos */ 649 complain_overflow_signed, /* complain_on_overflow */ 650 _bfd_mips_elf_generic_reloc, /* special_function */ 651 "R_MIPS_TLS_GOTTPREL", /* name */ 652 TRUE, /* partial_inplace */ 653 0x0000ffff, /* src_mask */ 654 0x0000ffff, /* dst_mask */ 655 FALSE), /* pcrel_offset */ 656 657 /* TLS IE dynamic relocations. */ 658 HOWTO (R_MIPS_TLS_TPREL32, /* type */ 659 0, /* rightshift */ 660 2, /* size (0 = byte, 1 = short, 2 = long) */ 661 32, /* bitsize */ 662 FALSE, /* pc_relative */ 663 0, /* bitpos */ 664 complain_overflow_dont, /* complain_on_overflow */ 665 _bfd_mips_elf_generic_reloc, /* special_function */ 666 "R_MIPS_TLS_TPREL32", /* name */ 667 TRUE, /* partial_inplace */ 668 0xffffffff, /* src_mask */ 669 0xffffffff, /* dst_mask */ 670 FALSE), /* pcrel_offset */ 671 672 EMPTY_HOWTO (R_MIPS_TLS_TPREL64), 673 674 /* TLS thread pointer offset. */ 675 HOWTO (R_MIPS_TLS_TPREL_HI16, /* type */ 676 0, /* rightshift */ 677 2, /* size (0 = byte, 1 = short, 2 = long) */ 678 16, /* bitsize */ 679 FALSE, /* pc_relative */ 680 0, /* bitpos */ 681 complain_overflow_signed, /* complain_on_overflow */ 682 _bfd_mips_elf_generic_reloc, /* special_function */ 683 "R_MIPS_TLS_TPREL_HI16", /* name */ 684 TRUE, /* partial_inplace */ 685 0x0000ffff, /* src_mask */ 686 0x0000ffff, /* dst_mask */ 687 FALSE), /* pcrel_offset */ 688 689 /* TLS thread pointer offset. */ 690 HOWTO (R_MIPS_TLS_TPREL_LO16, /* type */ 691 0, /* rightshift */ 692 2, /* size (0 = byte, 1 = short, 2 = long) */ 693 16, /* bitsize */ 694 FALSE, /* pc_relative */ 695 0, /* bitpos */ 696 complain_overflow_signed, /* complain_on_overflow */ 697 _bfd_mips_elf_generic_reloc, /* special_function */ 698 "R_MIPS_TLS_TPREL_LO16", /* name */ 699 TRUE, /* partial_inplace */ 700 0x0000ffff, /* src_mask */ 701 0x0000ffff, /* dst_mask */ 702 FALSE), /* pcrel_offset */ 703 704 /* 32 bit relocation with no addend. */ 705 HOWTO (R_MIPS_GLOB_DAT, /* type */ 706 0, /* rightshift */ 707 2, /* size (0 = byte, 1 = short, 2 = long) */ 708 32, /* bitsize */ 709 FALSE, /* pc_relative */ 710 0, /* bitpos */ 711 complain_overflow_dont, /* complain_on_overflow */ 712 _bfd_mips_elf_generic_reloc, /* special_function */ 713 "R_MIPS_GLOB_DAT", /* name */ 714 FALSE, /* partial_inplace */ 715 0x0, /* src_mask */ 716 0xffffffff, /* dst_mask */ 717 FALSE), /* pcrel_offset */ 718}; 719 720/* The reloc used for BFD_RELOC_CTOR when doing a 64 bit link. This 721 is a hack to make the linker think that we need 64 bit values. */ 722static reloc_howto_type elf_mips_ctor64_howto = 723 HOWTO (R_MIPS_64, /* type */ 724 0, /* rightshift */ 725 4, /* size (0 = byte, 1 = short, 2 = long) */ 726 32, /* bitsize */ 727 FALSE, /* pc_relative */ 728 0, /* bitpos */ 729 complain_overflow_signed, /* complain_on_overflow */ 730 mips32_64bit_reloc, /* special_function */ 731 "R_MIPS_64", /* name */ 732 TRUE, /* partial_inplace */ 733 0xffffffff, /* src_mask */ 734 0xffffffff, /* dst_mask */ 735 FALSE); /* pcrel_offset */ 736 737static reloc_howto_type elf_mips16_howto_table_rel[] = 738{ 739 /* The reloc used for the mips16 jump instruction. */ 740 HOWTO (R_MIPS16_26, /* type */ 741 2, /* rightshift */ 742 2, /* size (0 = byte, 1 = short, 2 = long) */ 743 26, /* bitsize */ 744 FALSE, /* pc_relative */ 745 0, /* bitpos */ 746 complain_overflow_dont, /* complain_on_overflow */ 747 /* This needs complex overflow 748 detection, because the upper four 749 bits must match the PC. */ 750 _bfd_mips_elf_generic_reloc, /* special_function */ 751 "R_MIPS16_26", /* name */ 752 TRUE, /* partial_inplace */ 753 0x3ffffff, /* src_mask */ 754 0x3ffffff, /* dst_mask */ 755 FALSE), /* pcrel_offset */ 756 757 /* The reloc used for the mips16 gprel instruction. */ 758 HOWTO (R_MIPS16_GPREL, /* type */ 759 0, /* rightshift */ 760 2, /* size (0 = byte, 1 = short, 2 = long) */ 761 16, /* bitsize */ 762 FALSE, /* pc_relative */ 763 0, /* bitpos */ 764 complain_overflow_signed, /* complain_on_overflow */ 765 mips16_gprel_reloc, /* special_function */ 766 "R_MIPS16_GPREL", /* name */ 767 TRUE, /* partial_inplace */ 768 0x0000ffff, /* src_mask */ 769 0x0000ffff, /* dst_mask */ 770 FALSE), /* pcrel_offset */ 771 772 /* A placeholder for MIPS16 reference to global offset table. */ 773 EMPTY_HOWTO (R_MIPS16_GOT16), 774 775 /* A placeholder for MIPS16 16 bit call through global offset table. */ 776 EMPTY_HOWTO (R_MIPS16_CALL16), 777 778 /* MIPS16 high 16 bits of symbol value. */ 779 HOWTO (R_MIPS16_HI16, /* type */ 780 16, /* rightshift */ 781 2, /* size (0 = byte, 1 = short, 2 = long) */ 782 16, /* bitsize */ 783 FALSE, /* pc_relative */ 784 0, /* bitpos */ 785 complain_overflow_dont, /* complain_on_overflow */ 786 _bfd_mips_elf_hi16_reloc, /* special_function */ 787 "R_MIPS16_HI16", /* name */ 788 TRUE, /* partial_inplace */ 789 0x0000ffff, /* src_mask */ 790 0x0000ffff, /* dst_mask */ 791 FALSE), /* pcrel_offset */ 792 793 /* MIPS16 low 16 bits of symbol value. */ 794 HOWTO (R_MIPS16_LO16, /* type */ 795 0, /* rightshift */ 796 2, /* size (0 = byte, 1 = short, 2 = long) */ 797 16, /* bitsize */ 798 FALSE, /* pc_relative */ 799 0, /* bitpos */ 800 complain_overflow_dont, /* complain_on_overflow */ 801 _bfd_mips_elf_lo16_reloc, /* special_function */ 802 "R_MIPS16_LO16", /* name */ 803 TRUE, /* partial_inplace */ 804 0x0000ffff, /* src_mask */ 805 0x0000ffff, /* dst_mask */ 806 FALSE), /* pcrel_offset */ 807}; 808 809/* 16 bit offset for pc-relative branches. */ 810static reloc_howto_type elf_mips_gnu_rel16_s2 = 811 HOWTO (R_MIPS_GNU_REL16_S2, /* type */ 812 2, /* rightshift */ 813 2, /* size (0 = byte, 1 = short, 2 = long) */ 814 16, /* bitsize */ 815 TRUE, /* pc_relative */ 816 0, /* bitpos */ 817 complain_overflow_signed, /* complain_on_overflow */ 818 _bfd_mips_elf_generic_reloc, /* special_function */ 819 "R_MIPS_GNU_REL16_S2", /* name */ 820 TRUE, /* partial_inplace */ 821 0xffff, /* src_mask */ 822 0xffff, /* dst_mask */ 823 TRUE); /* pcrel_offset */ 824 825/* 32 bit pc-relative. This was a GNU extension used by embedded-PIC. 826 It was co-opted by mips-linux for exception-handling data. It is no 827 longer used, but should continue to be supported by the linker for 828 backward compatibility. (GCC stopped using it in May, 2004.) */ 829static reloc_howto_type elf_mips_gnu_pcrel32 = 830 HOWTO (R_MIPS_PC32, /* type */ 831 0, /* rightshift */ 832 2, /* size (0 = byte, 1 = short, 2 = long) */ 833 32, /* bitsize */ 834 TRUE, /* pc_relative */ 835 0, /* bitpos */ 836 complain_overflow_signed, /* complain_on_overflow */ 837 _bfd_mips_elf_generic_reloc, /* special_function */ 838 "R_MIPS_PC32", /* name */ 839 TRUE, /* partial_inplace */ 840 0xffffffff, /* src_mask */ 841 0xffffffff, /* dst_mask */ 842 TRUE); /* pcrel_offset */ 843 844/* GNU extension to record C++ vtable hierarchy */ 845static reloc_howto_type elf_mips_gnu_vtinherit_howto = 846 HOWTO (R_MIPS_GNU_VTINHERIT, /* type */ 847 0, /* rightshift */ 848 2, /* size (0 = byte, 1 = short, 2 = long) */ 849 0, /* bitsize */ 850 FALSE, /* pc_relative */ 851 0, /* bitpos */ 852 complain_overflow_dont, /* complain_on_overflow */ 853 NULL, /* special_function */ 854 "R_MIPS_GNU_VTINHERIT", /* name */ 855 FALSE, /* partial_inplace */ 856 0, /* src_mask */ 857 0, /* dst_mask */ 858 FALSE); /* pcrel_offset */ 859 860/* GNU extension to record C++ vtable member usage */ 861static reloc_howto_type elf_mips_gnu_vtentry_howto = 862 HOWTO (R_MIPS_GNU_VTENTRY, /* type */ 863 0, /* rightshift */ 864 2, /* size (0 = byte, 1 = short, 2 = long) */ 865 0, /* bitsize */ 866 FALSE, /* pc_relative */ 867 0, /* bitpos */ 868 complain_overflow_dont, /* complain_on_overflow */ 869 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 870 "R_MIPS_GNU_VTENTRY", /* name */ 871 FALSE, /* partial_inplace */ 872 0, /* src_mask */ 873 0, /* dst_mask */ 874 FALSE); /* pcrel_offset */ 875 876/* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a 877 dangerous relocation. */ 878 879static bfd_boolean 880mips_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp) 881{ 882 unsigned int count; 883 asymbol **sym; 884 unsigned int i; 885 886 /* If we've already figured out what GP will be, just return it. */ 887 *pgp = _bfd_get_gp_value (output_bfd); 888 if (*pgp) 889 return TRUE; 890 891 count = bfd_get_symcount (output_bfd); 892 sym = bfd_get_outsymbols (output_bfd); 893 894 /* The linker script will have created a symbol named `_gp' with the 895 appropriate value. */ 896 if (sym == NULL) 897 i = count; 898 else 899 { 900 for (i = 0; i < count; i++, sym++) 901 { 902 register const char *name; 903 904 name = bfd_asymbol_name (*sym); 905 if (*name == '_' && strcmp (name, "_gp") == 0) 906 { 907 *pgp = bfd_asymbol_value (*sym); 908 _bfd_set_gp_value (output_bfd, *pgp); 909 break; 910 } 911 } 912 } 913 914 if (i >= count) 915 { 916 /* Only get the error once. */ 917 *pgp = 4; 918 _bfd_set_gp_value (output_bfd, *pgp); 919 return FALSE; 920 } 921 922 return TRUE; 923} 924 925/* We have to figure out the gp value, so that we can adjust the 926 symbol value correctly. We look up the symbol _gp in the output 927 BFD. If we can't find it, we're stuck. We cache it in the ELF 928 target data. We don't need to adjust the symbol value for an 929 external symbol if we are producing relocatable output. */ 930 931static bfd_reloc_status_type 932mips_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable, 933 char **error_message, bfd_vma *pgp) 934{ 935 if (bfd_is_und_section (symbol->section) 936 && ! relocatable) 937 { 938 *pgp = 0; 939 return bfd_reloc_undefined; 940 } 941 942 *pgp = _bfd_get_gp_value (output_bfd); 943 if (*pgp == 0 944 && (! relocatable 945 || (symbol->flags & BSF_SECTION_SYM) != 0)) 946 { 947 if (relocatable) 948 { 949 /* Make up a value. */ 950 *pgp = symbol->section->output_section->vma + 0x4000; 951 _bfd_set_gp_value (output_bfd, *pgp); 952 } 953 else if (!mips_elf_assign_gp (output_bfd, pgp)) 954 { 955 *error_message = 956 (char *) _("GP relative relocation when _gp not defined"); 957 return bfd_reloc_dangerous; 958 } 959 } 960 961 return bfd_reloc_ok; 962} 963 964/* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must 965 become the offset from the gp register. This function also handles 966 R_MIPS_LITERAL relocations, although those can be handled more 967 cleverly because the entries in the .lit8 and .lit4 sections can be 968 merged. */ 969 970bfd_reloc_status_type 971_bfd_mips_elf32_gprel16_reloc (bfd *abfd, arelent *reloc_entry, 972 asymbol *symbol, void *data, 973 asection *input_section, bfd *output_bfd, 974 char **error_message) 975{ 976 bfd_boolean relocatable; 977 bfd_reloc_status_type ret; 978 bfd_vma gp; 979 980 /* R_MIPS_LITERAL relocations are defined for local symbols only. */ 981 if (reloc_entry->howto->type == R_MIPS_LITERAL 982 && output_bfd != NULL 983 && (symbol->flags & BSF_SECTION_SYM) == 0 984 && (symbol->flags & BSF_LOCAL) != 0) 985 { 986 *error_message = (char *) 987 _("literal relocation occurs for an external symbol"); 988 return bfd_reloc_outofrange; 989 } 990 991 if (output_bfd != NULL) 992 relocatable = TRUE; 993 else 994 { 995 relocatable = FALSE; 996 output_bfd = symbol->section->output_section->owner; 997 } 998 999 ret = mips_elf_final_gp (output_bfd, symbol, relocatable, error_message, 1000 &gp); 1001 if (ret != bfd_reloc_ok) 1002 return ret; 1003 1004 return _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry, 1005 input_section, relocatable, 1006 data, gp); 1007} 1008 1009/* Do a R_MIPS_GPREL32 relocation. This is a 32 bit value which must 1010 become the offset from the gp register. */ 1011 1012static bfd_reloc_status_type 1013mips_elf_gprel32_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 1014 void *data, asection *input_section, bfd *output_bfd, 1015 char **error_message) 1016{ 1017 bfd_boolean relocatable; 1018 bfd_reloc_status_type ret; 1019 bfd_vma gp; 1020 1021 /* R_MIPS_GPREL32 relocations are defined for local symbols only. */ 1022 if (output_bfd != NULL 1023 && (symbol->flags & BSF_SECTION_SYM) == 0 1024 && (symbol->flags & BSF_LOCAL) != 0) 1025 { 1026 *error_message = (char *) 1027 _("32bits gp relative relocation occurs for an external symbol"); 1028 return bfd_reloc_outofrange; 1029 } 1030 1031 if (output_bfd != NULL) 1032 relocatable = TRUE; 1033 else 1034 { 1035 relocatable = FALSE; 1036 output_bfd = symbol->section->output_section->owner; 1037 } 1038 1039 ret = mips_elf_final_gp (output_bfd, symbol, relocatable, 1040 error_message, &gp); 1041 if (ret != bfd_reloc_ok) 1042 return ret; 1043 1044 return gprel32_with_gp (abfd, symbol, reloc_entry, input_section, 1045 relocatable, data, gp); 1046} 1047 1048static bfd_reloc_status_type 1049gprel32_with_gp (bfd *abfd, asymbol *symbol, arelent *reloc_entry, 1050 asection *input_section, bfd_boolean relocatable, 1051 void *data, bfd_vma gp) 1052{ 1053 bfd_vma relocation; 1054 bfd_vma val; 1055 1056 if (bfd_is_com_section (symbol->section)) 1057 relocation = 0; 1058 else 1059 relocation = symbol->value; 1060 1061 relocation += symbol->section->output_section->vma; 1062 relocation += symbol->section->output_offset; 1063 1064 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 1065 return bfd_reloc_outofrange; 1066 1067 /* Set val to the offset into the section or symbol. */ 1068 val = reloc_entry->addend; 1069 1070 if (reloc_entry->howto->partial_inplace) 1071 val += bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); 1072 1073 /* Adjust val for the final section location and GP value. If we 1074 are producing relocatable output, we don't want to do this for 1075 an external symbol. */ 1076 if (! relocatable 1077 || (symbol->flags & BSF_SECTION_SYM) != 0) 1078 val += relocation - gp; 1079 1080 if (reloc_entry->howto->partial_inplace) 1081 bfd_put_32 (abfd, val, (bfd_byte *) data + reloc_entry->address); 1082 else 1083 reloc_entry->addend = val; 1084 1085 if (relocatable) 1086 reloc_entry->address += input_section->output_offset; 1087 1088 return bfd_reloc_ok; 1089} 1090 1091/* Handle a 64 bit reloc in a 32 bit MIPS ELF file. These are 1092 generated when addresses are 64 bits. The upper 32 bits are a simple 1093 sign extension. */ 1094 1095static bfd_reloc_status_type 1096mips32_64bit_reloc (bfd *abfd, arelent *reloc_entry, 1097 asymbol *symbol ATTRIBUTE_UNUSED, 1098 void *data, asection *input_section, 1099 bfd *output_bfd, char **error_message) 1100{ 1101 bfd_reloc_status_type r; 1102 arelent reloc32; 1103 unsigned long val; 1104 bfd_size_type addr; 1105 1106 /* Do a normal 32 bit relocation on the lower 32 bits. */ 1107 reloc32 = *reloc_entry; 1108 if (bfd_big_endian (abfd)) 1109 reloc32.address += 4; 1110 reloc32.howto = &elf_mips_howto_table_rel[R_MIPS_32]; 1111 r = bfd_perform_relocation (abfd, &reloc32, data, input_section, 1112 output_bfd, error_message); 1113 1114 /* Sign extend into the upper 32 bits. */ 1115 val = bfd_get_32 (abfd, (bfd_byte *) data + reloc32.address); 1116 if ((val & 0x80000000) != 0) 1117 val = 0xffffffff; 1118 else 1119 val = 0; 1120 addr = reloc_entry->address; 1121 if (bfd_little_endian (abfd)) 1122 addr += 4; 1123 bfd_put_32 (abfd, val, (bfd_byte *) data + addr); 1124 1125 return r; 1126} 1127 1128/* Handle a mips16 GP relative reloc. */ 1129 1130static bfd_reloc_status_type 1131mips16_gprel_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 1132 void *data, asection *input_section, bfd *output_bfd, 1133 char **error_message) 1134{ 1135 bfd_boolean relocatable; 1136 bfd_reloc_status_type ret; 1137 bfd_byte *location; 1138 bfd_vma gp; 1139 1140 /* If we're relocating, and this is an external symbol, we don't want 1141 to change anything. */ 1142 if (output_bfd != NULL 1143 && (symbol->flags & BSF_SECTION_SYM) == 0 1144 && (symbol->flags & BSF_LOCAL) != 0) 1145 { 1146 reloc_entry->address += input_section->output_offset; 1147 return bfd_reloc_ok; 1148 } 1149 1150 if (output_bfd != NULL) 1151 relocatable = TRUE; 1152 else 1153 { 1154 relocatable = FALSE; 1155 output_bfd = symbol->section->output_section->owner; 1156 } 1157 1158 ret = mips_elf_final_gp (output_bfd, symbol, relocatable, error_message, 1159 &gp); 1160 if (ret != bfd_reloc_ok) 1161 return ret; 1162 1163 location = (bfd_byte *) data + reloc_entry->address; 1164 _bfd_mips16_elf_reloc_unshuffle (abfd, reloc_entry->howto->type, FALSE, 1165 location); 1166 ret = _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry, 1167 input_section, relocatable, 1168 data, gp); 1169 _bfd_mips16_elf_reloc_shuffle (abfd, reloc_entry->howto->type, !relocatable, 1170 location); 1171 1172 return ret; 1173} 1174 1175/* A mapping from BFD reloc types to MIPS ELF reloc types. */ 1176 1177struct elf_reloc_map { 1178 bfd_reloc_code_real_type bfd_val; 1179 enum elf_mips_reloc_type elf_val; 1180}; 1181 1182static const struct elf_reloc_map mips_reloc_map[] = 1183{ 1184 { BFD_RELOC_NONE, R_MIPS_NONE }, 1185 { BFD_RELOC_16, R_MIPS_16 }, 1186 { BFD_RELOC_32, R_MIPS_32 }, 1187 /* There is no BFD reloc for R_MIPS_REL32. */ 1188 { BFD_RELOC_64, R_MIPS_64 }, 1189 { BFD_RELOC_MIPS_JMP, R_MIPS_26 }, 1190 { BFD_RELOC_HI16_S, R_MIPS_HI16 }, 1191 { BFD_RELOC_LO16, R_MIPS_LO16 }, 1192 { BFD_RELOC_GPREL16, R_MIPS_GPREL16 }, 1193 { BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL }, 1194 { BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 }, 1195 { BFD_RELOC_16_PCREL_S2, R_MIPS_PC16 }, 1196 { BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 }, 1197 { BFD_RELOC_GPREL32, R_MIPS_GPREL32 }, 1198 { BFD_RELOC_MIPS_GOT_HI16, R_MIPS_GOT_HI16 }, 1199 { BFD_RELOC_MIPS_GOT_LO16, R_MIPS_GOT_LO16 }, 1200 { BFD_RELOC_MIPS_CALL_HI16, R_MIPS_CALL_HI16 }, 1201 { BFD_RELOC_MIPS_CALL_LO16, R_MIPS_CALL_LO16 }, 1202 { BFD_RELOC_MIPS_SUB, R_MIPS_SUB }, 1203 { BFD_RELOC_MIPS_GOT_PAGE, R_MIPS_GOT_PAGE }, 1204 { BFD_RELOC_MIPS_GOT_OFST, R_MIPS_GOT_OFST }, 1205 { BFD_RELOC_MIPS_GOT_DISP, R_MIPS_GOT_DISP }, 1206 { BFD_RELOC_MIPS_TLS_DTPMOD32, R_MIPS_TLS_DTPMOD32 }, 1207 { BFD_RELOC_MIPS_TLS_DTPREL32, R_MIPS_TLS_DTPREL32 }, 1208 { BFD_RELOC_MIPS_TLS_DTPMOD64, R_MIPS_TLS_DTPMOD64 }, 1209 { BFD_RELOC_MIPS_TLS_DTPREL64, R_MIPS_TLS_DTPREL64 }, 1210 { BFD_RELOC_MIPS_TLS_GD, R_MIPS_TLS_GD }, 1211 { BFD_RELOC_MIPS_TLS_LDM, R_MIPS_TLS_LDM }, 1212 { BFD_RELOC_MIPS_TLS_DTPREL_HI16, R_MIPS_TLS_DTPREL_HI16 }, 1213 { BFD_RELOC_MIPS_TLS_DTPREL_LO16, R_MIPS_TLS_DTPREL_LO16 }, 1214 { BFD_RELOC_MIPS_TLS_GOTTPREL, R_MIPS_TLS_GOTTPREL }, 1215 { BFD_RELOC_MIPS_TLS_TPREL32, R_MIPS_TLS_TPREL32 }, 1216 { BFD_RELOC_MIPS_TLS_TPREL64, R_MIPS_TLS_TPREL64 }, 1217 { BFD_RELOC_MIPS_TLS_TPREL_HI16, R_MIPS_TLS_TPREL_HI16 }, 1218 { BFD_RELOC_MIPS_TLS_TPREL_LO16, R_MIPS_TLS_TPREL_LO16 } 1219}; 1220 1221static const struct elf_reloc_map mips16_reloc_map[] = 1222{ 1223 { BFD_RELOC_MIPS16_JMP, R_MIPS16_26 - R_MIPS16_min }, 1224 { BFD_RELOC_MIPS16_GPREL, R_MIPS16_GPREL - R_MIPS16_min }, 1225 { BFD_RELOC_MIPS16_HI16_S, R_MIPS16_HI16 - R_MIPS16_min }, 1226 { BFD_RELOC_MIPS16_LO16, R_MIPS16_LO16 - R_MIPS16_min }, 1227}; 1228 1229/* Given a BFD reloc type, return a howto structure. */ 1230 1231static reloc_howto_type * 1232bfd_elf32_bfd_reloc_type_lookup (bfd *abfd, bfd_reloc_code_real_type code) 1233{ 1234 unsigned int i; 1235 reloc_howto_type *howto_table = elf_mips_howto_table_rel; 1236 reloc_howto_type *howto16_table = elf_mips16_howto_table_rel; 1237 1238 for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map); 1239 i++) 1240 { 1241 if (mips_reloc_map[i].bfd_val == code) 1242 return &howto_table[(int) mips_reloc_map[i].elf_val]; 1243 } 1244 1245 for (i = 0; i < sizeof (mips16_reloc_map) / sizeof (struct elf_reloc_map); 1246 i++) 1247 { 1248 if (mips16_reloc_map[i].bfd_val == code) 1249 return &howto16_table[(int) mips16_reloc_map[i].elf_val]; 1250 } 1251 1252 switch (code) 1253 { 1254 default: 1255 bfd_set_error (bfd_error_bad_value); 1256 return NULL; 1257 1258 case BFD_RELOC_CTOR: 1259 /* We need to handle BFD_RELOC_CTOR specially. 1260 Select the right relocation (R_MIPS_32 or R_MIPS_64) based on the 1261 size of addresses of the ABI. */ 1262 if ((elf_elfheader (abfd)->e_flags & (E_MIPS_ABI_O64 1263 | E_MIPS_ABI_EABI64)) != 0) 1264 return &elf_mips_ctor64_howto; 1265 else 1266 return &howto_table[(int) R_MIPS_32]; 1267 1268 case BFD_RELOC_VTABLE_INHERIT: 1269 return &elf_mips_gnu_vtinherit_howto; 1270 case BFD_RELOC_VTABLE_ENTRY: 1271 return &elf_mips_gnu_vtentry_howto; 1272 case BFD_RELOC_32_PCREL: 1273 return &elf_mips_gnu_pcrel32; 1274 } 1275} 1276 1277static reloc_howto_type * 1278bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1279 const char *r_name) 1280{ 1281 unsigned int i; 1282 1283 for (i = 0; 1284 i < (sizeof (elf_mips_howto_table_rel) 1285 / sizeof (elf_mips_howto_table_rel[0])); 1286 i++) 1287 if (elf_mips_howto_table_rel[i].name != NULL 1288 && strcasecmp (elf_mips_howto_table_rel[i].name, r_name) == 0) 1289 return &elf_mips_howto_table_rel[i]; 1290 1291 for (i = 0; 1292 i < (sizeof (elf_mips16_howto_table_rel) 1293 / sizeof (elf_mips16_howto_table_rel[0])); 1294 i++) 1295 if (elf_mips16_howto_table_rel[i].name != NULL 1296 && strcasecmp (elf_mips16_howto_table_rel[i].name, r_name) == 0) 1297 return &elf_mips16_howto_table_rel[i]; 1298 1299 if (strcasecmp (elf_mips_gnu_pcrel32.name, r_name) == 0) 1300 return &elf_mips_gnu_pcrel32; 1301 if (strcasecmp (elf_mips_gnu_rel16_s2.name, r_name) == 0) 1302 return &elf_mips_gnu_rel16_s2; 1303 if (strcasecmp (elf_mips_gnu_vtinherit_howto.name, r_name) == 0) 1304 return &elf_mips_gnu_vtinherit_howto; 1305 if (strcasecmp (elf_mips_gnu_vtentry_howto.name, r_name) == 0) 1306 return &elf_mips_gnu_vtentry_howto; 1307 1308 return NULL; 1309} 1310 1311/* Given a MIPS Elf_Internal_Rel, fill in an arelent structure. */ 1312 1313static reloc_howto_type * 1314mips_elf32_rtype_to_howto (unsigned int r_type, 1315 bfd_boolean rela_p ATTRIBUTE_UNUSED) 1316{ 1317 switch (r_type) 1318 { 1319 case R_MIPS_GNU_VTINHERIT: 1320 return &elf_mips_gnu_vtinherit_howto; 1321 case R_MIPS_GNU_VTENTRY: 1322 return &elf_mips_gnu_vtentry_howto; 1323 case R_MIPS_GNU_REL16_S2: 1324 return &elf_mips_gnu_rel16_s2; 1325 case R_MIPS_PC32: 1326 return &elf_mips_gnu_pcrel32; 1327 default: 1328 if (r_type >= R_MIPS16_min && r_type < R_MIPS16_max) 1329 return &elf_mips16_howto_table_rel[r_type - R_MIPS16_min]; 1330 BFD_ASSERT (r_type < (unsigned int) R_MIPS_max); 1331 return &elf_mips_howto_table_rel[r_type]; 1332 } 1333} 1334 1335/* Given a MIPS Elf_Internal_Rel, fill in an arelent structure. */ 1336 1337static void 1338mips_info_to_howto_rel (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst) 1339{ 1340 const struct elf_backend_data *bed; 1341 unsigned int r_type; 1342 1343 r_type = ELF32_R_TYPE (dst->r_info); 1344 bed = get_elf_backend_data (abfd); 1345 cache_ptr->howto = bed->elf_backend_mips_rtype_to_howto (r_type, FALSE); 1346 1347 /* The addend for a GPREL16 or LITERAL relocation comes from the GP 1348 value for the object file. We get the addend now, rather than 1349 when we do the relocation, because the symbol manipulations done 1350 by the linker may cause us to lose track of the input BFD. */ 1351 if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0 1352 && (r_type == (unsigned int) R_MIPS_GPREL16 1353 || r_type == (unsigned int) R_MIPS_LITERAL)) 1354 cache_ptr->addend = elf_gp (abfd); 1355} 1356 1357/* Given a MIPS Elf_Internal_Rela, fill in an arelent structure. */ 1358 1359static void 1360mips_info_to_howto_rela (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst) 1361{ 1362 mips_info_to_howto_rel (abfd, cache_ptr, dst); 1363 1364 /* If we ever need to do any extra processing with dst->r_addend 1365 (the field omitted in an Elf_Internal_Rel) we can do it here. */ 1366} 1367 1368/* Determine whether a symbol is global for the purposes of splitting 1369 the symbol table into global symbols and local symbols. At least 1370 on Irix 5, this split must be between section symbols and all other 1371 symbols. On most ELF targets the split is between static symbols 1372 and externally visible symbols. */ 1373 1374static bfd_boolean 1375mips_elf_sym_is_global (bfd *abfd ATTRIBUTE_UNUSED, asymbol *sym) 1376{ 1377 if (SGI_COMPAT (abfd)) 1378 return (sym->flags & BSF_SECTION_SYM) == 0; 1379 else 1380 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0 1381 || bfd_is_und_section (bfd_get_section (sym)) 1382 || bfd_is_com_section (bfd_get_section (sym))); 1383} 1384 1385/* Set the right machine number for a MIPS ELF file. */ 1386 1387static bfd_boolean 1388mips_elf32_object_p (bfd *abfd) 1389{ 1390 unsigned long mach; 1391 1392 /* Irix 5 and 6 are broken. Object file symbol tables are not always 1393 sorted correctly such that local symbols precede global symbols, 1394 and the sh_info field in the symbol table is not always right. */ 1395 if (SGI_COMPAT (abfd)) 1396 elf_bad_symtab (abfd) = TRUE; 1397 1398 if (ABI_N32_P (abfd)) 1399 return FALSE; 1400 1401 mach = _bfd_elf_mips_mach (elf_elfheader (abfd)->e_flags); 1402 bfd_default_set_arch_mach (abfd, bfd_arch_mips, mach); 1403 1404 return TRUE; 1405} 1406 1407/* MIPS ELF local labels start with '$', not 'L'. */ 1408 1409static bfd_boolean 1410mips_elf_is_local_label_name (bfd *abfd, const char *name) 1411{ 1412 if (name[0] == '$') 1413 return TRUE; 1414 1415 /* On Irix 6, the labels go back to starting with '.', so we accept 1416 the generic ELF local label syntax as well. */ 1417 return _bfd_elf_is_local_label_name (abfd, name); 1418} 1419 1420/* Support for core dump NOTE sections. */ 1421static bfd_boolean 1422elf32_mips_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 1423{ 1424 int offset; 1425 unsigned int size; 1426 1427 switch (note->descsz) 1428 { 1429 default: 1430 return FALSE; 1431 1432 case 256: /* Linux/MIPS */ 1433 /* pr_cursig */ 1434 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); 1435 1436 /* pr_pid */ 1437 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); 1438 1439 /* pr_reg */ 1440 offset = 72; 1441 size = 180; 1442 1443 break; 1444 } 1445 1446 /* Make a ".reg/999" section. */ 1447 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 1448 size, note->descpos + offset); 1449} 1450 1451static bfd_boolean 1452elf32_mips_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 1453{ 1454 switch (note->descsz) 1455 { 1456 default: 1457 return FALSE; 1458 1459 case 128: /* Linux/MIPS elf_prpsinfo */ 1460 elf_tdata (abfd)->core_program 1461 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); 1462 elf_tdata (abfd)->core_command 1463 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); 1464 } 1465 1466 /* Note that for some reason, a spurious space is tacked 1467 onto the end of the args in some (at least one anyway) 1468 implementations, so strip it off if it exists. */ 1469 1470 { 1471 char *command = elf_tdata (abfd)->core_command; 1472 int n = strlen (command); 1473 1474 if (0 < n && command[n - 1] == ' ') 1475 command[n - 1] = '\0'; 1476 } 1477 1478 return TRUE; 1479} 1480 1481/* Depending on the target vector we generate some version of Irix 1482 executables or "normal" MIPS ELF ABI executables. */ 1483static irix_compat_t 1484elf32_mips_irix_compat (bfd *abfd) 1485{ 1486 if ((abfd->xvec == &bfd_elf32_bigmips_vec) 1487 || (abfd->xvec == &bfd_elf32_littlemips_vec)) 1488 return ict_irix5; 1489 else 1490 return ict_none; 1491} 1492 1493/* ECOFF swapping routines. These are used when dealing with the 1494 .mdebug section, which is in the ECOFF debugging format. */ 1495static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = { 1496 /* Symbol table magic number. */ 1497 magicSym, 1498 /* Alignment of debugging information. E.g., 4. */ 1499 4, 1500 /* Sizes of external symbolic information. */ 1501 sizeof (struct hdr_ext), 1502 sizeof (struct dnr_ext), 1503 sizeof (struct pdr_ext), 1504 sizeof (struct sym_ext), 1505 sizeof (struct opt_ext), 1506 sizeof (struct fdr_ext), 1507 sizeof (struct rfd_ext), 1508 sizeof (struct ext_ext), 1509 /* Functions to swap in external symbolic data. */ 1510 ecoff_swap_hdr_in, 1511 ecoff_swap_dnr_in, 1512 ecoff_swap_pdr_in, 1513 ecoff_swap_sym_in, 1514 ecoff_swap_opt_in, 1515 ecoff_swap_fdr_in, 1516 ecoff_swap_rfd_in, 1517 ecoff_swap_ext_in, 1518 _bfd_ecoff_swap_tir_in, 1519 _bfd_ecoff_swap_rndx_in, 1520 /* Functions to swap out external symbolic data. */ 1521 ecoff_swap_hdr_out, 1522 ecoff_swap_dnr_out, 1523 ecoff_swap_pdr_out, 1524 ecoff_swap_sym_out, 1525 ecoff_swap_opt_out, 1526 ecoff_swap_fdr_out, 1527 ecoff_swap_rfd_out, 1528 ecoff_swap_ext_out, 1529 _bfd_ecoff_swap_tir_out, 1530 _bfd_ecoff_swap_rndx_out, 1531 /* Function to read in symbolic data. */ 1532 _bfd_mips_elf_read_ecoff_info 1533}; 1534 1535#define ELF_ARCH bfd_arch_mips 1536#define ELF_MACHINE_CODE EM_MIPS 1537 1538#define elf_backend_collect TRUE 1539#define elf_backend_type_change_ok TRUE 1540#define elf_backend_can_gc_sections TRUE 1541#define elf_info_to_howto mips_info_to_howto_rela 1542#define elf_info_to_howto_rel mips_info_to_howto_rel 1543#define elf_backend_sym_is_global mips_elf_sym_is_global 1544#define elf_backend_object_p mips_elf32_object_p 1545#define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing 1546#define elf_backend_section_processing _bfd_mips_elf_section_processing 1547#define elf_backend_section_from_shdr _bfd_mips_elf_section_from_shdr 1548#define elf_backend_fake_sections _bfd_mips_elf_fake_sections 1549#define elf_backend_section_from_bfd_section \ 1550 _bfd_mips_elf_section_from_bfd_section 1551#define elf_backend_add_symbol_hook _bfd_mips_elf_add_symbol_hook 1552#define elf_backend_link_output_symbol_hook \ 1553 _bfd_mips_elf_link_output_symbol_hook 1554#define elf_backend_create_dynamic_sections \ 1555 _bfd_mips_elf_create_dynamic_sections 1556#define elf_backend_check_relocs _bfd_mips_elf_check_relocs 1557#define elf_backend_merge_symbol_attribute \ 1558 _bfd_mips_elf_merge_symbol_attribute 1559#define elf_backend_adjust_dynamic_symbol \ 1560 _bfd_mips_elf_adjust_dynamic_symbol 1561#define elf_backend_always_size_sections \ 1562 _bfd_mips_elf_always_size_sections 1563#define elf_backend_size_dynamic_sections \ 1564 _bfd_mips_elf_size_dynamic_sections 1565#define elf_backend_init_index_section _bfd_elf_init_1_index_section 1566#define elf_backend_relocate_section _bfd_mips_elf_relocate_section 1567#define elf_backend_finish_dynamic_symbol \ 1568 _bfd_mips_elf_finish_dynamic_symbol 1569#define elf_backend_finish_dynamic_sections \ 1570 _bfd_mips_elf_finish_dynamic_sections 1571#define elf_backend_final_write_processing \ 1572 _bfd_mips_elf_final_write_processing 1573#define elf_backend_additional_program_headers \ 1574 _bfd_mips_elf_additional_program_headers 1575#define elf_backend_modify_segment_map _bfd_mips_elf_modify_segment_map 1576#define elf_backend_gc_mark_hook _bfd_mips_elf_gc_mark_hook 1577#define elf_backend_gc_sweep_hook _bfd_mips_elf_gc_sweep_hook 1578#define elf_backend_copy_indirect_symbol \ 1579 _bfd_mips_elf_copy_indirect_symbol 1580#define elf_backend_hide_symbol _bfd_mips_elf_hide_symbol 1581#define elf_backend_grok_prstatus elf32_mips_grok_prstatus 1582#define elf_backend_grok_psinfo elf32_mips_grok_psinfo 1583#define elf_backend_ecoff_debug_swap &mips_elf32_ecoff_debug_swap 1584 1585#define elf_backend_got_header_size (4 * MIPS_RESERVED_GOTNO) 1586#define elf_backend_may_use_rel_p 1 1587#define elf_backend_may_use_rela_p 0 1588#define elf_backend_default_use_rela_p 0 1589#define elf_backend_sign_extend_vma TRUE 1590 1591#define elf_backend_discard_info _bfd_mips_elf_discard_info 1592#define elf_backend_ignore_discarded_relocs \ 1593 _bfd_mips_elf_ignore_discarded_relocs 1594#define elf_backend_mips_irix_compat elf32_mips_irix_compat 1595#define elf_backend_mips_rtype_to_howto mips_elf32_rtype_to_howto 1596#define bfd_elf32_bfd_is_local_label_name \ 1597 mips_elf_is_local_label_name 1598#define bfd_elf32_find_nearest_line _bfd_mips_elf_find_nearest_line 1599#define bfd_elf32_find_inliner_info _bfd_mips_elf_find_inliner_info 1600#define bfd_elf32_new_section_hook _bfd_mips_elf_new_section_hook 1601#define bfd_elf32_set_section_contents _bfd_mips_elf_set_section_contents 1602#define bfd_elf32_bfd_get_relocated_section_contents \ 1603 _bfd_elf_mips_get_relocated_section_contents 1604#define bfd_elf32_bfd_link_hash_table_create \ 1605 _bfd_mips_elf_link_hash_table_create 1606#define bfd_elf32_bfd_final_link _bfd_mips_elf_final_link 1607#define bfd_elf32_bfd_merge_private_bfd_data \ 1608 _bfd_mips_elf_merge_private_bfd_data 1609#define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags 1610#define bfd_elf32_bfd_print_private_bfd_data \ 1611 _bfd_mips_elf_print_private_bfd_data 1612 1613/* Support for SGI-ish mips targets. */ 1614#define TARGET_LITTLE_SYM bfd_elf32_littlemips_vec 1615#define TARGET_LITTLE_NAME "elf32-littlemips" 1616#define TARGET_BIG_SYM bfd_elf32_bigmips_vec 1617#define TARGET_BIG_NAME "elf32-bigmips" 1618 1619/* The SVR4 MIPS ABI says that this should be 0x10000, but Irix 5 uses 1620 a value of 0x1000, and we are compatible. */ 1621#define ELF_MAXPAGESIZE 0x1000 1622#define ELF_COMMONPAGESIZE 0x1000 1623 1624#include "elf32-target.h" 1625 1626/* Support for traditional mips targets. */ 1627#undef TARGET_LITTLE_SYM 1628#undef TARGET_LITTLE_NAME 1629#undef TARGET_BIG_SYM 1630#undef TARGET_BIG_NAME 1631 1632#undef ELF_MAXPAGESIZE 1633#undef ELF_COMMONPAGESIZE 1634 1635#define TARGET_LITTLE_SYM bfd_elf32_tradlittlemips_vec 1636#define TARGET_LITTLE_NAME "elf32-tradlittlemips" 1637#define TARGET_BIG_SYM bfd_elf32_tradbigmips_vec 1638#define TARGET_BIG_NAME "elf32-tradbigmips" 1639 1640/* The MIPS ABI says at Page 5-1: 1641 Virtual addresses and file offsets for MIPS segments are congruent 1642 modulo 64 KByte (0x10000) or larger powers of 2. Because 64 KBytes 1643 is the maximum page size, the files are suitable for paging 1644 regardless of physical page size. */ 1645#define ELF_MAXPAGESIZE 0x10000 1646#define ELF_COMMONPAGESIZE 0x1000 1647#define elf32_bed elf32_tradbed 1648 1649/* Include the target file again for this target. */ 1650#include "elf32-target.h" 1651 1652 1653/* Specific to VxWorks. */ 1654static reloc_howto_type mips_vxworks_copy_howto_rela = 1655 HOWTO (R_MIPS_COPY, /* type */ 1656 0, /* rightshift */ 1657 2, /* size (0 = byte, 1 = short, 2 = long) */ 1658 32, /* bitsize */ 1659 FALSE, /* pc_relative */ 1660 0, /* bitpos */ 1661 complain_overflow_bitfield, /* complain_on_overflow */ 1662 bfd_elf_generic_reloc, /* special_function */ 1663 "R_MIPS_COPY", /* name */ 1664 FALSE, /* partial_inplace */ 1665 0x0, /* src_mask */ 1666 0x0, /* dst_mask */ 1667 FALSE); /* pcrel_offset */ 1668 1669/* Specific to VxWorks. */ 1670static reloc_howto_type mips_vxworks_jump_slot_howto_rela = 1671 HOWTO (R_MIPS_JUMP_SLOT, /* type */ 1672 0, /* rightshift */ 1673 2, /* size (0 = byte, 1 = short, 2 = long) */ 1674 32, /* bitsize */ 1675 FALSE, /* pc_relative */ 1676 0, /* bitpos */ 1677 complain_overflow_bitfield, /* complain_on_overflow */ 1678 bfd_elf_generic_reloc, /* special_function */ 1679 "R_MIPS_JUMP_SLOT", /* name */ 1680 FALSE, /* partial_inplace */ 1681 0x0, /* src_mask */ 1682 0x0, /* dst_mask */ 1683 FALSE); /* pcrel_offset */ 1684 1685/* Implement elf_backend_bfd_reloc_type_lookup for VxWorks. */ 1686 1687static reloc_howto_type * 1688mips_vxworks_bfd_reloc_type_lookup (bfd *abfd, bfd_reloc_code_real_type code) 1689{ 1690 switch (code) 1691 { 1692 case BFD_RELOC_MIPS_COPY: 1693 return &mips_vxworks_copy_howto_rela; 1694 case BFD_RELOC_MIPS_JUMP_SLOT: 1695 return &mips_vxworks_jump_slot_howto_rela; 1696 default: 1697 return bfd_elf32_bfd_reloc_type_lookup (abfd, code); 1698 } 1699} 1700 1701static reloc_howto_type * 1702mips_vxworks_bfd_reloc_name_lookup (bfd *abfd, const char *r_name) 1703{ 1704 if (strcasecmp (mips_vxworks_copy_howto_rela.name, r_name) == 0) 1705 return &mips_vxworks_copy_howto_rela; 1706 if (strcasecmp (mips_vxworks_jump_slot_howto_rela.name, r_name) == 0) 1707 return &mips_vxworks_jump_slot_howto_rela; 1708 1709 return bfd_elf32_bfd_reloc_name_lookup (abfd, r_name); 1710} 1711 1712/* Implement elf_backend_mips_rtype_to_lookup for VxWorks. */ 1713 1714static reloc_howto_type * 1715mips_vxworks_rtype_to_howto (unsigned int r_type, bfd_boolean rela_p) 1716{ 1717 switch (r_type) 1718 { 1719 case R_MIPS_COPY: 1720 return &mips_vxworks_copy_howto_rela; 1721 case R_MIPS_JUMP_SLOT: 1722 return &mips_vxworks_jump_slot_howto_rela; 1723 default: 1724 return mips_elf32_rtype_to_howto (r_type, rela_p); 1725 } 1726} 1727 1728/* Implement elf_backend_final_write_processing for VxWorks. */ 1729 1730static void 1731mips_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) 1732{ 1733 _bfd_mips_elf_final_write_processing (abfd, linker); 1734 elf_vxworks_final_write_processing (abfd, linker); 1735} 1736 1737#undef TARGET_LITTLE_SYM 1738#undef TARGET_LITTLE_NAME 1739#undef TARGET_BIG_SYM 1740#undef TARGET_BIG_NAME 1741 1742#undef ELF_MAXPAGESIZE 1743#undef ELF_COMMONPAGESIZE 1744 1745#define TARGET_LITTLE_SYM bfd_elf32_littlemips_vxworks_vec 1746#define TARGET_LITTLE_NAME "elf32-littlemips-vxworks" 1747#define TARGET_BIG_SYM bfd_elf32_bigmips_vxworks_vec 1748#define TARGET_BIG_NAME "elf32-bigmips-vxworks" 1749 1750#undef elf32_bed 1751#define elf32_bed elf32_mips_vxworks_bed 1752 1753#define ELF_MAXPAGESIZE 0x1000 1754#define ELF_COMMONPAGESIZE 0x1000 1755 1756#undef elf_backend_want_got_plt 1757#define elf_backend_want_got_plt 1 1758#undef elf_backend_want_plt_sym 1759#define elf_backend_want_plt_sym 1 1760#undef elf_backend_got_symbol_offset 1761#define elf_backend_got_symbol_offset 0 1762#undef elf_backend_want_dynbss 1763#define elf_backend_want_dynbss 1 1764#undef elf_backend_may_use_rel_p 1765#define elf_backend_may_use_rel_p 0 1766#undef elf_backend_may_use_rela_p 1767#define elf_backend_may_use_rela_p 1 1768#undef elf_backend_default_use_rela_p 1769#define elf_backend_default_use_rela_p 1 1770#undef elf_backend_got_header_size 1771#define elf_backend_got_header_size (4 * 3) 1772#undef elf_backend_plt_readonly 1773#define elf_backend_plt_readonly 1 1774 1775#undef bfd_elf32_bfd_reloc_type_lookup 1776#define bfd_elf32_bfd_reloc_type_lookup \ 1777 mips_vxworks_bfd_reloc_type_lookup 1778#undef bfd_elf32_bfd_reloc_name_lookup 1779#define bfd_elf32_bfd_reloc_name_lookup \ 1780 mips_vxworks_bfd_reloc_name_lookup 1781#undef elf_backend_mips_rtype_to_howto 1782#define elf_backend_mips_rtype_to_howto \ 1783 mips_vxworks_rtype_to_howto 1784#undef elf_backend_adjust_dynamic_symbol 1785#define elf_backend_adjust_dynamic_symbol \ 1786 _bfd_mips_vxworks_adjust_dynamic_symbol 1787#undef elf_backend_finish_dynamic_symbol 1788#define elf_backend_finish_dynamic_symbol \ 1789 _bfd_mips_vxworks_finish_dynamic_symbol 1790#undef bfd_elf32_bfd_link_hash_table_create 1791#define bfd_elf32_bfd_link_hash_table_create \ 1792 _bfd_mips_vxworks_link_hash_table_create 1793#undef elf_backend_add_symbol_hook 1794#define elf_backend_add_symbol_hook \ 1795 elf_vxworks_add_symbol_hook 1796#undef elf_backend_link_output_symbol_hook 1797#define elf_backend_link_output_symbol_hook \ 1798 elf_vxworks_link_output_symbol_hook 1799#undef elf_backend_emit_relocs 1800#define elf_backend_emit_relocs \ 1801 elf_vxworks_emit_relocs 1802#undef elf_backend_final_write_processing 1803#define elf_backend_final_write_processing \ 1804 mips_vxworks_final_write_processing 1805 1806#undef elf_backend_additional_program_headers 1807#undef elf_backend_modify_segment_map 1808#undef elf_backend_symbol_processing 1809/* NOTE: elf_backend_rela_normal is not defined for MIPS. */ 1810 1811#include "elf32-target.h" 1812