1 /* Xilinx MicroBlaze-specific support for 32-bit ELF 2 3 Copyright (C) 2009-2020 Free Software Foundation, Inc. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the 19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, 20 Boston, MA 02110-1301, USA. */ 21 22 23 int dbg = 0; 24 25 #include "sysdep.h" 26 #include "bfd.h" 27 #include "bfdlink.h" 28 #include "libbfd.h" 29 #include "elf-bfd.h" 30 #include "elf/microblaze.h" 31 #include <assert.h> 32 33 #define USE_RELA /* Only USE_REL is actually significant, but this is 34 here are a reminder... */ 35 #define INST_WORD_SIZE 4 36 37 static int ro_small_data_pointer = 0; 38 static int rw_small_data_pointer = 0; 39 40 static reloc_howto_type * microblaze_elf_howto_table [(int) R_MICROBLAZE_max]; 41 42 static reloc_howto_type microblaze_elf_howto_raw[] = 43 { 44 /* This reloc does nothing. */ 45 HOWTO (R_MICROBLAZE_NONE, /* Type. */ 46 0, /* Rightshift. */ 47 3, /* Size (0 = byte, 1 = short, 2 = long). */ 48 0, /* Bitsize. */ 49 FALSE, /* PC_relative. */ 50 0, /* Bitpos. */ 51 complain_overflow_dont, /* Complain on overflow. */ 52 NULL, /* Special Function. */ 53 "R_MICROBLAZE_NONE", /* Name. */ 54 FALSE, /* Partial Inplace. */ 55 0, /* Source Mask. */ 56 0, /* Dest Mask. */ 57 FALSE), /* PC relative offset? */ 58 59 /* A standard 32 bit relocation. */ 60 HOWTO (R_MICROBLAZE_32, /* Type. */ 61 0, /* Rightshift. */ 62 2, /* Size (0 = byte, 1 = short, 2 = long). */ 63 32, /* Bitsize. */ 64 FALSE, /* PC_relative. */ 65 0, /* Bitpos. */ 66 complain_overflow_bitfield, /* Complain on overflow. */ 67 bfd_elf_generic_reloc,/* Special Function. */ 68 "R_MICROBLAZE_32", /* Name. */ 69 FALSE, /* Partial Inplace. */ 70 0, /* Source Mask. */ 71 0xffffffff, /* Dest Mask. */ 72 FALSE), /* PC relative offset? */ 73 74 /* A standard PCREL 32 bit relocation. */ 75 HOWTO (R_MICROBLAZE_32_PCREL,/* Type. */ 76 0, /* Rightshift. */ 77 2, /* Size (0 = byte, 1 = short, 2 = long). */ 78 32, /* Bitsize. */ 79 TRUE, /* PC_relative. */ 80 0, /* Bitpos. */ 81 complain_overflow_bitfield, /* Complain on overflow. */ 82 bfd_elf_generic_reloc,/* Special Function. */ 83 "R_MICROBLAZE_32_PCREL", /* Name. */ 84 TRUE, /* Partial Inplace. */ 85 0, /* Source Mask. */ 86 0xffffffff, /* Dest Mask. */ 87 TRUE), /* PC relative offset? */ 88 89 /* A 64 bit PCREL relocation. Table-entry not really used. */ 90 HOWTO (R_MICROBLAZE_64_PCREL,/* Type. */ 91 0, /* Rightshift. */ 92 2, /* Size (0 = byte, 1 = short, 2 = long). */ 93 16, /* Bitsize. */ 94 TRUE, /* PC_relative. */ 95 0, /* Bitpos. */ 96 complain_overflow_dont, /* Complain on overflow. */ 97 bfd_elf_generic_reloc,/* Special Function. */ 98 "R_MICROBLAZE_64_PCREL", /* Name. */ 99 FALSE, /* Partial Inplace. */ 100 0, /* Source Mask. */ 101 0x0000ffff, /* Dest Mask. */ 102 TRUE), /* PC relative offset? */ 103 104 /* The low half of a PCREL 32 bit relocation. */ 105 HOWTO (R_MICROBLAZE_32_PCREL_LO, /* Type. */ 106 0, /* Rightshift. */ 107 2, /* Size (0 = byte, 1 = short, 2 = long). */ 108 16, /* Bitsize. */ 109 TRUE, /* PC_relative. */ 110 0, /* Bitpos. */ 111 complain_overflow_signed, /* Complain on overflow. */ 112 bfd_elf_generic_reloc, /* Special Function. */ 113 "R_MICROBLAZE_32_PCREL_LO", /* Name. */ 114 FALSE, /* Partial Inplace. */ 115 0, /* Source Mask. */ 116 0x0000ffff, /* Dest Mask. */ 117 TRUE), /* PC relative offset? */ 118 119 /* A 64 bit relocation. Table entry not really used. */ 120 HOWTO (R_MICROBLAZE_64, /* Type. */ 121 0, /* Rightshift. */ 122 2, /* Size (0 = byte, 1 = short, 2 = long). */ 123 16, /* Bitsize. */ 124 FALSE, /* PC_relative. */ 125 0, /* Bitpos. */ 126 complain_overflow_dont, /* Complain on overflow. */ 127 bfd_elf_generic_reloc,/* Special Function. */ 128 "R_MICROBLAZE_64", /* Name. */ 129 FALSE, /* Partial Inplace. */ 130 0, /* Source Mask. */ 131 0x0000ffff, /* Dest Mask. */ 132 FALSE), /* PC relative offset? */ 133 134 /* The low half of a 32 bit relocation. */ 135 HOWTO (R_MICROBLAZE_32_LO, /* Type. */ 136 0, /* Rightshift. */ 137 2, /* Size (0 = byte, 1 = short, 2 = long). */ 138 16, /* Bitsize. */ 139 FALSE, /* PC_relative. */ 140 0, /* Bitpos. */ 141 complain_overflow_signed, /* Complain on overflow. */ 142 bfd_elf_generic_reloc,/* Special Function. */ 143 "R_MICROBLAZE_32_LO", /* Name. */ 144 FALSE, /* Partial Inplace. */ 145 0, /* Source Mask. */ 146 0x0000ffff, /* Dest Mask. */ 147 FALSE), /* PC relative offset? */ 148 149 /* Read-only small data section relocation. */ 150 HOWTO (R_MICROBLAZE_SRO32, /* Type. */ 151 0, /* Rightshift. */ 152 2, /* Size (0 = byte, 1 = short, 2 = long). */ 153 16, /* Bitsize. */ 154 FALSE, /* PC_relative. */ 155 0, /* Bitpos. */ 156 complain_overflow_bitfield, /* Complain on overflow. */ 157 bfd_elf_generic_reloc,/* Special Function. */ 158 "R_MICROBLAZE_SRO32", /* Name. */ 159 FALSE, /* Partial Inplace. */ 160 0, /* Source Mask. */ 161 0x0000ffff, /* Dest Mask. */ 162 FALSE), /* PC relative offset? */ 163 164 /* Read-write small data area relocation. */ 165 HOWTO (R_MICROBLAZE_SRW32, /* Type. */ 166 0, /* Rightshift. */ 167 2, /* Size (0 = byte, 1 = short, 2 = long). */ 168 16, /* Bitsize. */ 169 FALSE, /* PC_relative. */ 170 0, /* Bitpos. */ 171 complain_overflow_bitfield, /* Complain on overflow. */ 172 bfd_elf_generic_reloc,/* Special Function. */ 173 "R_MICROBLAZE_SRW32", /* Name. */ 174 FALSE, /* Partial Inplace. */ 175 0, /* Source Mask. */ 176 0x0000ffff, /* Dest Mask. */ 177 FALSE), /* PC relative offset? */ 178 179 /* This reloc does nothing. Used for relaxation. */ 180 HOWTO (R_MICROBLAZE_64_NONE, /* Type. */ 181 0, /* Rightshift. */ 182 3, /* Size (0 = byte, 1 = short, 2 = long). */ 183 0, /* Bitsize. */ 184 TRUE, /* PC_relative. */ 185 0, /* Bitpos. */ 186 complain_overflow_dont, /* Complain on overflow. */ 187 NULL, /* Special Function. */ 188 "R_MICROBLAZE_64_NONE",/* Name. */ 189 FALSE, /* Partial Inplace. */ 190 0, /* Source Mask. */ 191 0, /* Dest Mask. */ 192 FALSE), /* PC relative offset? */ 193 194 /* Symbol Op Symbol relocation. */ 195 HOWTO (R_MICROBLAZE_32_SYM_OP_SYM, /* Type. */ 196 0, /* Rightshift. */ 197 2, /* Size (0 = byte, 1 = short, 2 = long). */ 198 32, /* Bitsize. */ 199 FALSE, /* PC_relative. */ 200 0, /* Bitpos. */ 201 complain_overflow_bitfield, /* Complain on overflow. */ 202 bfd_elf_generic_reloc,/* Special Function. */ 203 "R_MICROBLAZE_32_SYM_OP_SYM", /* Name. */ 204 FALSE, /* Partial Inplace. */ 205 0, /* Source Mask. */ 206 0xffffffff, /* Dest Mask. */ 207 FALSE), /* PC relative offset? */ 208 209 /* GNU extension to record C++ vtable hierarchy. */ 210 HOWTO (R_MICROBLAZE_GNU_VTINHERIT, /* Type. */ 211 0, /* Rightshift. */ 212 2, /* Size (0 = byte, 1 = short, 2 = long). */ 213 0, /* Bitsize. */ 214 FALSE, /* PC_relative. */ 215 0, /* Bitpos. */ 216 complain_overflow_dont,/* Complain on overflow. */ 217 NULL, /* Special Function. */ 218 "R_MICROBLAZE_GNU_VTINHERIT", /* Name. */ 219 FALSE, /* Partial Inplace. */ 220 0, /* Source Mask. */ 221 0, /* Dest Mask. */ 222 FALSE), /* PC relative offset? */ 223 224 /* GNU extension to record C++ vtable member usage. */ 225 HOWTO (R_MICROBLAZE_GNU_VTENTRY, /* Type. */ 226 0, /* Rightshift. */ 227 2, /* Size (0 = byte, 1 = short, 2 = long). */ 228 0, /* Bitsize. */ 229 FALSE, /* PC_relative. */ 230 0, /* Bitpos. */ 231 complain_overflow_dont,/* Complain on overflow. */ 232 _bfd_elf_rel_vtable_reloc_fn, /* Special Function. */ 233 "R_MICROBLAZE_GNU_VTENTRY", /* Name. */ 234 FALSE, /* Partial Inplace. */ 235 0, /* Source Mask. */ 236 0, /* Dest Mask. */ 237 FALSE), /* PC relative offset? */ 238 239 /* A 64 bit GOTPC relocation. Table-entry not really used. */ 240 HOWTO (R_MICROBLAZE_GOTPC_64, /* Type. */ 241 0, /* Rightshift. */ 242 2, /* Size (0 = byte, 1 = short, 2 = long). */ 243 16, /* Bitsize. */ 244 TRUE, /* PC_relative. */ 245 0, /* Bitpos. */ 246 complain_overflow_dont, /* Complain on overflow. */ 247 bfd_elf_generic_reloc, /* Special Function. */ 248 "R_MICROBLAZE_GOTPC_64", /* Name. */ 249 FALSE, /* Partial Inplace. */ 250 0, /* Source Mask. */ 251 0x0000ffff, /* Dest Mask. */ 252 TRUE), /* PC relative offset? */ 253 254 /* A 64 bit TEXTPCREL relocation. Table-entry not really used. */ 255 HOWTO (R_MICROBLAZE_TEXTPCREL_64, /* Type. */ 256 0, /* Rightshift. */ 257 2, /* Size (0 = byte, 1 = short, 2 = long). */ 258 16, /* Bitsize. */ 259 TRUE, /* PC_relative. */ 260 0, /* Bitpos. */ 261 complain_overflow_dont, /* Complain on overflow. */ 262 bfd_elf_generic_reloc, /* Special Function. */ 263 "R_MICROBLAZE_TEXTPCREL_64", /* Name. */ 264 FALSE, /* Partial Inplace. */ 265 0, /* Source Mask. */ 266 0x0000ffff, /* Dest Mask. */ 267 TRUE), /* PC relative offset? */ 268 269 /* A 64 bit GOT relocation. Table-entry not really used. */ 270 HOWTO (R_MICROBLAZE_GOT_64, /* Type. */ 271 0, /* Rightshift. */ 272 2, /* Size (0 = byte, 1 = short, 2 = long). */ 273 16, /* Bitsize. */ 274 FALSE, /* PC_relative. */ 275 0, /* Bitpos. */ 276 complain_overflow_dont, /* Complain on overflow. */ 277 bfd_elf_generic_reloc,/* Special Function. */ 278 "R_MICROBLAZE_GOT_64",/* Name. */ 279 FALSE, /* Partial Inplace. */ 280 0, /* Source Mask. */ 281 0x0000ffff, /* Dest Mask. */ 282 FALSE), /* PC relative offset? */ 283 284 /* A 64 bit TEXTREL relocation. Table-entry not really used. */ 285 HOWTO (R_MICROBLAZE_TEXTREL_64, /* Type. */ 286 0, /* Rightshift. */ 287 2, /* Size (0 = byte, 1 = short, 2 = long). */ 288 16, /* Bitsize. */ 289 FALSE, /* PC_relative. */ 290 0, /* Bitpos. */ 291 complain_overflow_dont, /* Complain on overflow. */ 292 bfd_elf_generic_reloc,/* Special Function. */ 293 "R_MICROBLAZE_TEXTREL_64",/* Name. */ 294 FALSE, /* Partial Inplace. */ 295 0, /* Source Mask. */ 296 0x0000ffff, /* Dest Mask. */ 297 FALSE), /* PC relative offset? */ 298 299 /* A 64 bit PLT relocation. Table-entry not really used. */ 300 HOWTO (R_MICROBLAZE_PLT_64, /* Type. */ 301 0, /* Rightshift. */ 302 2, /* Size (0 = byte, 1 = short, 2 = long). */ 303 16, /* Bitsize. */ 304 TRUE, /* PC_relative. */ 305 0, /* Bitpos. */ 306 complain_overflow_dont, /* Complain on overflow. */ 307 bfd_elf_generic_reloc,/* Special Function. */ 308 "R_MICROBLAZE_PLT_64",/* Name. */ 309 FALSE, /* Partial Inplace. */ 310 0, /* Source Mask. */ 311 0x0000ffff, /* Dest Mask. */ 312 TRUE), /* PC relative offset? */ 313 314 /* Table-entry not really used. */ 315 HOWTO (R_MICROBLAZE_REL, /* Type. */ 316 0, /* Rightshift. */ 317 2, /* Size (0 = byte, 1 = short, 2 = long). */ 318 16, /* Bitsize. */ 319 TRUE, /* PC_relative. */ 320 0, /* Bitpos. */ 321 complain_overflow_dont, /* Complain on overflow. */ 322 bfd_elf_generic_reloc,/* Special Function. */ 323 "R_MICROBLAZE_REL", /* Name. */ 324 FALSE, /* Partial Inplace. */ 325 0, /* Source Mask. */ 326 0x0000ffff, /* Dest Mask. */ 327 TRUE), /* PC relative offset? */ 328 329 /* Table-entry not really used. */ 330 HOWTO (R_MICROBLAZE_JUMP_SLOT,/* Type. */ 331 0, /* Rightshift. */ 332 2, /* Size (0 = byte, 1 = short, 2 = long). */ 333 16, /* Bitsize. */ 334 TRUE, /* PC_relative. */ 335 0, /* Bitpos. */ 336 complain_overflow_dont, /* Complain on overflow. */ 337 bfd_elf_generic_reloc,/* Special Function. */ 338 "R_MICROBLAZE_JUMP_SLOT", /* Name. */ 339 FALSE, /* Partial Inplace. */ 340 0, /* Source Mask. */ 341 0x0000ffff, /* Dest Mask. */ 342 TRUE), /* PC relative offset? */ 343 344 /* Table-entry not really used. */ 345 HOWTO (R_MICROBLAZE_GLOB_DAT,/* Type. */ 346 0, /* Rightshift. */ 347 2, /* Size (0 = byte, 1 = short, 2 = long). */ 348 16, /* Bitsize. */ 349 TRUE, /* PC_relative. */ 350 0, /* Bitpos. */ 351 complain_overflow_dont, /* Complain on overflow. */ 352 bfd_elf_generic_reloc,/* Special Function. */ 353 "R_MICROBLAZE_GLOB_DAT", /* Name. */ 354 FALSE, /* Partial Inplace. */ 355 0, /* Source Mask. */ 356 0x0000ffff, /* Dest Mask. */ 357 TRUE), /* PC relative offset? */ 358 359 /* A 64 bit GOT relative relocation. Table-entry not really used. */ 360 HOWTO (R_MICROBLAZE_GOTOFF_64, /* 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_dont, /* Complain on overflow. */ 367 bfd_elf_generic_reloc,/* Special Function. */ 368 "R_MICROBLAZE_GOTOFF_64", /* Name. */ 369 FALSE, /* Partial Inplace. */ 370 0, /* Source Mask. */ 371 0x0000ffff, /* Dest Mask. */ 372 FALSE), /* PC relative offset? */ 373 374 /* A 32 bit GOT relative relocation. Table-entry not really used. */ 375 HOWTO (R_MICROBLAZE_GOTOFF_32, /* 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_dont, /* Complain on overflow. */ 382 bfd_elf_generic_reloc, /* Special Function. */ 383 "R_MICROBLAZE_GOTOFF_32", /* Name. */ 384 FALSE, /* Partial Inplace. */ 385 0, /* Source Mask. */ 386 0x0000ffff, /* Dest Mask. */ 387 FALSE), /* PC relative offset? */ 388 389 /* COPY relocation. Table-entry not really used. */ 390 HOWTO (R_MICROBLAZE_COPY, /* 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_dont, /* Complain on overflow. */ 397 bfd_elf_generic_reloc,/* Special Function. */ 398 "R_MICROBLAZE_COPY", /* Name. */ 399 FALSE, /* Partial Inplace. */ 400 0, /* Source Mask. */ 401 0x0000ffff, /* Dest Mask. */ 402 FALSE), /* PC relative offset? */ 403 404 /* Marker relocs for TLS. */ 405 HOWTO (R_MICROBLAZE_TLS, 406 0, /* rightshift */ 407 2, /* size (0 = byte, 1 = short, 2 = long) */ 408 32, /* bitsize */ 409 FALSE, /* pc_relative */ 410 0, /* bitpos */ 411 complain_overflow_dont, /* complain_on_overflow */ 412 bfd_elf_generic_reloc, /* special_function */ 413 "R_MICROBLAZE_TLS", /* name */ 414 FALSE, /* partial_inplace */ 415 0, /* src_mask */ 416 0x0000ffff, /* dst_mask */ 417 FALSE), /* pcrel_offset */ 418 419 HOWTO (R_MICROBLAZE_TLSGD, 420 0, /* rightshift */ 421 2, /* size (0 = byte, 1 = short, 2 = long) */ 422 32, /* bitsize */ 423 FALSE, /* pc_relative */ 424 0, /* bitpos */ 425 complain_overflow_dont, /* complain_on_overflow */ 426 bfd_elf_generic_reloc, /* special_function */ 427 "R_MICROBLAZE_TLSGD", /* name */ 428 FALSE, /* partial_inplace */ 429 0, /* src_mask */ 430 0x0000ffff, /* dst_mask */ 431 FALSE), /* pcrel_offset */ 432 433 HOWTO (R_MICROBLAZE_TLSLD, 434 0, /* rightshift */ 435 2, /* size (0 = byte, 1 = short, 2 = long) */ 436 32, /* bitsize */ 437 FALSE, /* pc_relative */ 438 0, /* bitpos */ 439 complain_overflow_dont, /* complain_on_overflow */ 440 bfd_elf_generic_reloc, /* special_function */ 441 "R_MICROBLAZE_TLSLD", /* name */ 442 FALSE, /* partial_inplace */ 443 0, /* src_mask */ 444 0x0000ffff, /* dst_mask */ 445 FALSE), /* pcrel_offset */ 446 447 /* Computes the load module index of the load module that contains the 448 definition of its TLS sym. */ 449 HOWTO (R_MICROBLAZE_TLSDTPMOD32, 450 0, /* rightshift */ 451 2, /* size (0 = byte, 1 = short, 2 = long) */ 452 32, /* bitsize */ 453 FALSE, /* pc_relative */ 454 0, /* bitpos */ 455 complain_overflow_dont, /* complain_on_overflow */ 456 bfd_elf_generic_reloc, /* special_function */ 457 "R_MICROBLAZE_TLSDTPMOD32", /* name */ 458 FALSE, /* partial_inplace */ 459 0, /* src_mask */ 460 0x0000ffff, /* dst_mask */ 461 FALSE), /* pcrel_offset */ 462 463 /* Computes a dtv-relative displacement, the difference between the value 464 of sym+add and the base address of the thread-local storage block that 465 contains the definition of sym, minus 0x8000. Used for initializing GOT */ 466 HOWTO (R_MICROBLAZE_TLSDTPREL32, 467 0, /* rightshift */ 468 2, /* size (0 = byte, 1 = short, 2 = long) */ 469 32, /* bitsize */ 470 FALSE, /* pc_relative */ 471 0, /* bitpos */ 472 complain_overflow_dont, /* complain_on_overflow */ 473 bfd_elf_generic_reloc, /* special_function */ 474 "R_MICROBLAZE_TLSDTPREL32", /* name */ 475 FALSE, /* partial_inplace */ 476 0, /* src_mask */ 477 0x0000ffff, /* dst_mask */ 478 FALSE), /* pcrel_offset */ 479 480 /* Computes a dtv-relative displacement, the difference between the value 481 of sym+add and the base address of the thread-local storage block that 482 contains the definition of sym, minus 0x8000. */ 483 HOWTO (R_MICROBLAZE_TLSDTPREL64, 484 0, /* rightshift */ 485 2, /* size (0 = byte, 1 = short, 2 = long) */ 486 32, /* bitsize */ 487 FALSE, /* pc_relative */ 488 0, /* bitpos */ 489 complain_overflow_dont, /* complain_on_overflow */ 490 bfd_elf_generic_reloc, /* special_function */ 491 "R_MICROBLAZE_TLSDTPREL64", /* name */ 492 FALSE, /* partial_inplace */ 493 0, /* src_mask */ 494 0x0000ffff, /* dst_mask */ 495 FALSE), /* pcrel_offset */ 496 497 /* Computes a tp-relative displacement, the difference between the value of 498 sym+add and the value of the thread pointer (r13). */ 499 HOWTO (R_MICROBLAZE_TLSGOTTPREL32, 500 0, /* rightshift */ 501 2, /* size (0 = byte, 1 = short, 2 = long) */ 502 32, /* bitsize */ 503 FALSE, /* pc_relative */ 504 0, /* bitpos */ 505 complain_overflow_dont, /* complain_on_overflow */ 506 bfd_elf_generic_reloc, /* special_function */ 507 "R_MICROBLAZE_TLSGOTTPREL32", /* name */ 508 FALSE, /* partial_inplace */ 509 0, /* src_mask */ 510 0x0000ffff, /* dst_mask */ 511 FALSE), /* pcrel_offset */ 512 513 /* Computes a tp-relative displacement, the difference between the value of 514 sym+add and the value of the thread pointer (r13). */ 515 HOWTO (R_MICROBLAZE_TLSTPREL32, 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_elf_generic_reloc, /* special_function */ 523 "R_MICROBLAZE_TLSTPREL32", /* name */ 524 FALSE, /* partial_inplace */ 525 0, /* src_mask */ 526 0x0000ffff, /* dst_mask */ 527 FALSE), /* pcrel_offset */ 528 529 }; 530 531 #ifndef NUM_ELEM 532 #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0]) 533 #endif 534 535 /* Initialize the microblaze_elf_howto_table, so that linear accesses can be done. */ 536 537 static void 538 microblaze_elf_howto_init (void) 539 { 540 unsigned int i; 541 542 for (i = NUM_ELEM (microblaze_elf_howto_raw); i--;) 543 { 544 unsigned int type; 545 546 type = microblaze_elf_howto_raw[i].type; 547 548 BFD_ASSERT (type < NUM_ELEM (microblaze_elf_howto_table)); 549 550 microblaze_elf_howto_table [type] = & microblaze_elf_howto_raw [i]; 551 } 552 } 553 554 static reloc_howto_type * 555 microblaze_elf_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, 556 bfd_reloc_code_real_type code) 557 { 558 enum elf_microblaze_reloc_type microblaze_reloc = R_MICROBLAZE_NONE; 559 560 switch (code) 561 { 562 case BFD_RELOC_NONE: 563 microblaze_reloc = R_MICROBLAZE_NONE; 564 break; 565 case BFD_RELOC_MICROBLAZE_64_NONE: 566 microblaze_reloc = R_MICROBLAZE_64_NONE; 567 break; 568 case BFD_RELOC_32: 569 microblaze_reloc = R_MICROBLAZE_32; 570 break; 571 /* RVA is treated the same as 32 */ 572 case BFD_RELOC_RVA: 573 microblaze_reloc = R_MICROBLAZE_32; 574 break; 575 case BFD_RELOC_32_PCREL: 576 microblaze_reloc = R_MICROBLAZE_32_PCREL; 577 break; 578 case BFD_RELOC_64_PCREL: 579 microblaze_reloc = R_MICROBLAZE_64_PCREL; 580 break; 581 case BFD_RELOC_MICROBLAZE_32_LO_PCREL: 582 microblaze_reloc = R_MICROBLAZE_32_PCREL_LO; 583 break; 584 case BFD_RELOC_64: 585 microblaze_reloc = R_MICROBLAZE_64; 586 break; 587 case BFD_RELOC_MICROBLAZE_32_LO: 588 microblaze_reloc = R_MICROBLAZE_32_LO; 589 break; 590 case BFD_RELOC_MICROBLAZE_32_ROSDA: 591 microblaze_reloc = R_MICROBLAZE_SRO32; 592 break; 593 case BFD_RELOC_MICROBLAZE_32_RWSDA: 594 microblaze_reloc = R_MICROBLAZE_SRW32; 595 break; 596 case BFD_RELOC_MICROBLAZE_32_SYM_OP_SYM: 597 microblaze_reloc = R_MICROBLAZE_32_SYM_OP_SYM; 598 break; 599 case BFD_RELOC_VTABLE_INHERIT: 600 microblaze_reloc = R_MICROBLAZE_GNU_VTINHERIT; 601 break; 602 case BFD_RELOC_VTABLE_ENTRY: 603 microblaze_reloc = R_MICROBLAZE_GNU_VTENTRY; 604 break; 605 case BFD_RELOC_MICROBLAZE_64_GOTPC: 606 microblaze_reloc = R_MICROBLAZE_GOTPC_64; 607 break; 608 case BFD_RELOC_MICROBLAZE_64_GOT: 609 microblaze_reloc = R_MICROBLAZE_GOT_64; 610 break; 611 case BFD_RELOC_MICROBLAZE_64_TEXTPCREL: 612 microblaze_reloc = R_MICROBLAZE_TEXTPCREL_64; 613 break; 614 case BFD_RELOC_MICROBLAZE_64_TEXTREL: 615 microblaze_reloc = R_MICROBLAZE_TEXTREL_64; 616 break; 617 case BFD_RELOC_MICROBLAZE_64_PLT: 618 microblaze_reloc = R_MICROBLAZE_PLT_64; 619 break; 620 case BFD_RELOC_MICROBLAZE_64_GOTOFF: 621 microblaze_reloc = R_MICROBLAZE_GOTOFF_64; 622 break; 623 case BFD_RELOC_MICROBLAZE_32_GOTOFF: 624 microblaze_reloc = R_MICROBLAZE_GOTOFF_32; 625 break; 626 case BFD_RELOC_MICROBLAZE_64_TLSGD: 627 microblaze_reloc = R_MICROBLAZE_TLSGD; 628 break; 629 case BFD_RELOC_MICROBLAZE_64_TLSLD: 630 microblaze_reloc = R_MICROBLAZE_TLSLD; 631 break; 632 case BFD_RELOC_MICROBLAZE_32_TLSDTPREL: 633 microblaze_reloc = R_MICROBLAZE_TLSDTPREL32; 634 break; 635 case BFD_RELOC_MICROBLAZE_64_TLSDTPREL: 636 microblaze_reloc = R_MICROBLAZE_TLSDTPREL64; 637 break; 638 case BFD_RELOC_MICROBLAZE_32_TLSDTPMOD: 639 microblaze_reloc = R_MICROBLAZE_TLSDTPMOD32; 640 break; 641 case BFD_RELOC_MICROBLAZE_64_TLSGOTTPREL: 642 microblaze_reloc = R_MICROBLAZE_TLSGOTTPREL32; 643 break; 644 case BFD_RELOC_MICROBLAZE_64_TLSTPREL: 645 microblaze_reloc = R_MICROBLAZE_TLSTPREL32; 646 break; 647 case BFD_RELOC_MICROBLAZE_COPY: 648 microblaze_reloc = R_MICROBLAZE_COPY; 649 break; 650 default: 651 return (reloc_howto_type *) NULL; 652 } 653 654 if (!microblaze_elf_howto_table [R_MICROBLAZE_32]) 655 /* Initialize howto table if needed. */ 656 microblaze_elf_howto_init (); 657 658 return microblaze_elf_howto_table [(int) microblaze_reloc]; 659 }; 660 661 static reloc_howto_type * 662 microblaze_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 663 const char *r_name) 664 { 665 unsigned int i; 666 667 for (i = 0; i < NUM_ELEM (microblaze_elf_howto_raw); i++) 668 if (microblaze_elf_howto_raw[i].name != NULL 669 && strcasecmp (microblaze_elf_howto_raw[i].name, r_name) == 0) 670 return µblaze_elf_howto_raw[i]; 671 672 return NULL; 673 } 674 675 /* Set the howto pointer for a RCE ELF reloc. */ 676 677 static bfd_boolean 678 microblaze_elf_info_to_howto (bfd * abfd, 679 arelent * cache_ptr, 680 Elf_Internal_Rela * dst) 681 { 682 unsigned int r_type; 683 684 if (!microblaze_elf_howto_table [R_MICROBLAZE_32]) 685 /* Initialize howto table if needed. */ 686 microblaze_elf_howto_init (); 687 688 r_type = ELF32_R_TYPE (dst->r_info); 689 if (r_type >= R_MICROBLAZE_max) 690 { 691 /* xgettext:c-format */ 692 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 693 abfd, r_type); 694 bfd_set_error (bfd_error_bad_value); 695 return FALSE; 696 } 697 698 cache_ptr->howto = microblaze_elf_howto_table [r_type]; 699 return TRUE; 700 } 701 702 /* Microblaze ELF local labels start with 'L.' or '$L', not '.L'. */ 703 704 static bfd_boolean 705 microblaze_elf_is_local_label_name (bfd *abfd, const char *name) 706 { 707 if (name[0] == 'L' && name[1] == '.') 708 return TRUE; 709 710 if (name[0] == '$' && name[1] == 'L') 711 return TRUE; 712 713 /* With gcc, the labels go back to starting with '.', so we accept 714 the generic ELF local label syntax as well. */ 715 return _bfd_elf_is_local_label_name (abfd, name); 716 } 717 718 /* ELF linker hash entry. */ 719 720 struct elf32_mb_link_hash_entry 721 { 722 struct elf_link_hash_entry elf; 723 724 /* TLS Reference Types for the symbol; Updated by check_relocs */ 725 #define TLS_GD 1 /* GD reloc. */ 726 #define TLS_LD 2 /* LD reloc. */ 727 #define TLS_TPREL 4 /* TPREL reloc, => IE. */ 728 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ 729 #define TLS_TLS 16 /* Any TLS reloc. */ 730 unsigned char tls_mask; 731 732 }; 733 734 #define IS_TLS_GD(x) (x == (TLS_TLS | TLS_GD)) 735 #define IS_TLS_LD(x) (x == (TLS_TLS | TLS_LD)) 736 #define IS_TLS_DTPREL(x) (x == (TLS_TLS | TLS_DTPREL)) 737 #define IS_TLS_NONE(x) (x == 0) 738 739 #define elf32_mb_hash_entry(ent) ((struct elf32_mb_link_hash_entry *)(ent)) 740 741 /* ELF linker hash table. */ 742 743 struct elf32_mb_link_hash_table 744 { 745 struct elf_link_hash_table elf; 746 747 /* TLS Local Dynamic GOT Entry */ 748 union { 749 bfd_signed_vma refcount; 750 bfd_vma offset; 751 } tlsld_got; 752 }; 753 754 /* Nonzero if this section has TLS related relocations. */ 755 #define has_tls_reloc sec_flg0 756 757 /* Get the ELF linker hash table from a link_info structure. */ 758 759 #define elf32_mb_hash_table(p) \ 760 ((is_elf_hash_table ((p)->hash) \ 761 && elf_hash_table_id (elf_hash_table (p)) == MICROBLAZE_ELF_DATA) \ 762 ? (struct elf32_mb_link_hash_table *) (p)->hash : NULL) 763 764 /* Create an entry in a microblaze ELF linker hash table. */ 765 766 static struct bfd_hash_entry * 767 link_hash_newfunc (struct bfd_hash_entry *entry, 768 struct bfd_hash_table *table, 769 const char *string) 770 { 771 /* Allocate the structure if it has not already been allocated by a 772 subclass. */ 773 if (entry == NULL) 774 { 775 entry = bfd_hash_allocate (table, 776 sizeof (struct elf32_mb_link_hash_entry)); 777 if (entry == NULL) 778 return entry; 779 } 780 781 /* Call the allocation method of the superclass. */ 782 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 783 if (entry != NULL) 784 { 785 struct elf32_mb_link_hash_entry *eh; 786 787 eh = (struct elf32_mb_link_hash_entry *) entry; 788 eh->tls_mask = 0; 789 } 790 791 return entry; 792 } 793 794 /* Create a mb ELF linker hash table. */ 795 796 static struct bfd_link_hash_table * 797 microblaze_elf_link_hash_table_create (bfd *abfd) 798 { 799 struct elf32_mb_link_hash_table *ret; 800 size_t amt = sizeof (struct elf32_mb_link_hash_table); 801 802 ret = (struct elf32_mb_link_hash_table *) bfd_zmalloc (amt); 803 if (ret == NULL) 804 return NULL; 805 806 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, 807 sizeof (struct elf32_mb_link_hash_entry), 808 MICROBLAZE_ELF_DATA)) 809 { 810 free (ret); 811 return NULL; 812 } 813 814 return &ret->elf.root; 815 } 816 817 /* Set the values of the small data pointers. */ 818 819 static void 820 microblaze_elf_final_sdp (struct bfd_link_info *info) 821 { 822 struct bfd_link_hash_entry *h; 823 824 h = bfd_link_hash_lookup (info->hash, RO_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE); 825 if (h != (struct bfd_link_hash_entry *) NULL 826 && h->type == bfd_link_hash_defined) 827 ro_small_data_pointer = (h->u.def.value 828 + h->u.def.section->output_section->vma 829 + h->u.def.section->output_offset); 830 831 h = bfd_link_hash_lookup (info->hash, RW_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE); 832 if (h != (struct bfd_link_hash_entry *) NULL 833 && h->type == bfd_link_hash_defined) 834 rw_small_data_pointer = (h->u.def.value 835 + h->u.def.section->output_section->vma 836 + h->u.def.section->output_offset); 837 } 838 839 static bfd_vma 840 dtprel_base (struct bfd_link_info *info) 841 { 842 /* If tls_sec is NULL, we should have signalled an error already. */ 843 if (elf_hash_table (info)->tls_sec == NULL) 844 return 0; 845 return elf_hash_table (info)->tls_sec->vma; 846 } 847 848 /* The size of the thread control block. */ 849 #define TCB_SIZE 8 850 851 /* Output a simple dynamic relocation into SRELOC. */ 852 853 static void 854 microblaze_elf_output_dynamic_relocation (bfd *output_bfd, 855 asection *sreloc, 856 unsigned long reloc_index, 857 unsigned long indx, 858 int r_type, 859 bfd_vma offset, 860 bfd_vma addend) 861 { 862 863 Elf_Internal_Rela rel; 864 865 rel.r_info = ELF32_R_INFO (indx, r_type); 866 rel.r_offset = offset; 867 rel.r_addend = addend; 868 869 bfd_elf32_swap_reloca_out (output_bfd, &rel, 870 (sreloc->contents + reloc_index * sizeof (Elf32_External_Rela))); 871 } 872 873 /* This code is taken from elf32-m32r.c 874 There is some attempt to make this function usable for many architectures, 875 both USE_REL and USE_RELA ['twould be nice if such a critter existed], 876 if only to serve as a learning tool. 877 878 The RELOCATE_SECTION function is called by the new ELF backend linker 879 to handle the relocations for a section. 880 881 The relocs are always passed as Rela structures; if the section 882 actually uses Rel structures, the r_addend field will always be 883 zero. 884 885 This function is responsible for adjust the section contents as 886 necessary, and (if using Rela relocs and generating a 887 relocatable output file) adjusting the reloc addend as 888 necessary. 889 890 This function does not have to worry about setting the reloc 891 address or the reloc symbol index. 892 893 LOCAL_SYMS is a pointer to the swapped in local symbols. 894 895 LOCAL_SECTIONS is an array giving the section in the input file 896 corresponding to the st_shndx field of each local symbol. 897 898 The global hash table entry for the global symbols can be found 899 via elf_sym_hashes (input_bfd). 900 901 When generating relocatable output, this function must handle 902 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 903 going to be the section symbol corresponding to the output 904 section, which means that the addend must be adjusted 905 accordingly. */ 906 907 static bfd_boolean 908 microblaze_elf_relocate_section (bfd *output_bfd, 909 struct bfd_link_info *info, 910 bfd *input_bfd, 911 asection *input_section, 912 bfd_byte *contents, 913 Elf_Internal_Rela *relocs, 914 Elf_Internal_Sym *local_syms, 915 asection **local_sections) 916 { 917 struct elf32_mb_link_hash_table *htab; 918 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 919 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); 920 Elf_Internal_Rela *rel, *relend; 921 int endian = (bfd_little_endian (output_bfd)) ? 0 : 2; 922 /* Assume success. */ 923 bfd_boolean ret = TRUE; 924 asection *sreloc; 925 bfd_vma *local_got_offsets; 926 unsigned int tls_type; 927 928 if (!microblaze_elf_howto_table[R_MICROBLAZE_max-1]) 929 microblaze_elf_howto_init (); 930 931 htab = elf32_mb_hash_table (info); 932 if (htab == NULL) 933 return FALSE; 934 935 local_got_offsets = elf_local_got_offsets (input_bfd); 936 937 sreloc = elf_section_data (input_section)->sreloc; 938 939 rel = relocs; 940 relend = relocs + input_section->reloc_count; 941 for (; rel < relend; rel++) 942 { 943 int r_type; 944 reloc_howto_type *howto; 945 unsigned long r_symndx; 946 bfd_vma addend = rel->r_addend; 947 bfd_vma offset = rel->r_offset; 948 struct elf_link_hash_entry *h; 949 Elf_Internal_Sym *sym; 950 asection *sec; 951 const char *sym_name; 952 bfd_reloc_status_type r = bfd_reloc_ok; 953 const char *errmsg = NULL; 954 bfd_boolean unresolved_reloc = FALSE; 955 956 h = NULL; 957 r_type = ELF32_R_TYPE (rel->r_info); 958 tls_type = 0; 959 960 if (r_type < 0 || r_type >= (int) R_MICROBLAZE_max) 961 { 962 /* xgettext:c-format */ 963 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 964 input_bfd, (int) r_type); 965 bfd_set_error (bfd_error_bad_value); 966 ret = FALSE; 967 continue; 968 } 969 970 howto = microblaze_elf_howto_table[r_type]; 971 r_symndx = ELF32_R_SYM (rel->r_info); 972 973 if (bfd_link_relocatable (info)) 974 { 975 /* This is a relocatable link. We don't have to change 976 anything, unless the reloc is against a section symbol, 977 in which case we have to adjust according to where the 978 section symbol winds up in the output section. */ 979 sec = NULL; 980 if (r_symndx >= symtab_hdr->sh_info) 981 /* External symbol. */ 982 continue; 983 984 /* Local symbol. */ 985 sym = local_syms + r_symndx; 986 sym_name = "<local symbol>"; 987 /* STT_SECTION: symbol is associated with a section. */ 988 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) 989 /* Symbol isn't associated with a section. Nothing to do. */ 990 continue; 991 992 sec = local_sections[r_symndx]; 993 addend += sec->output_offset + sym->st_value; 994 #ifndef USE_REL 995 /* This can't be done for USE_REL because it doesn't mean anything 996 and elf_link_input_bfd asserts this stays zero. */ 997 /* rel->r_addend = addend; */ 998 #endif 999 1000 #ifndef USE_REL 1001 /* Addends are stored with relocs. We're done. */ 1002 continue; 1003 #else /* USE_REL */ 1004 /* If partial_inplace, we need to store any additional addend 1005 back in the section. */ 1006 if (!howto->partial_inplace) 1007 continue; 1008 /* ??? Here is a nice place to call a special_function like handler. */ 1009 r = _bfd_relocate_contents (howto, input_bfd, addend, 1010 contents + offset); 1011 #endif /* USE_REL */ 1012 } 1013 else 1014 { 1015 bfd_vma relocation; 1016 bfd_boolean resolved_to_zero; 1017 1018 /* This is a final link. */ 1019 sym = NULL; 1020 sec = NULL; 1021 unresolved_reloc = FALSE; 1022 1023 if (r_symndx < symtab_hdr->sh_info) 1024 { 1025 /* Local symbol. */ 1026 sym = local_syms + r_symndx; 1027 sec = local_sections[r_symndx]; 1028 if (sec == 0) 1029 continue; 1030 sym_name = "<local symbol>"; 1031 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 1032 /* r_addend may have changed if the reference section was 1033 a merge section. */ 1034 addend = rel->r_addend; 1035 } 1036 else 1037 { 1038 /* External symbol. */ 1039 bfd_boolean warned ATTRIBUTE_UNUSED; 1040 bfd_boolean ignored ATTRIBUTE_UNUSED; 1041 1042 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 1043 r_symndx, symtab_hdr, sym_hashes, 1044 h, sec, relocation, 1045 unresolved_reloc, warned, ignored); 1046 sym_name = h->root.root.string; 1047 } 1048 1049 /* Sanity check the address. */ 1050 if (offset > bfd_get_section_limit (input_bfd, input_section)) 1051 { 1052 r = bfd_reloc_outofrange; 1053 goto check_reloc; 1054 } 1055 1056 resolved_to_zero = (h != NULL 1057 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); 1058 1059 switch ((int) r_type) 1060 { 1061 case (int) R_MICROBLAZE_SRO32 : 1062 { 1063 const char *name; 1064 1065 /* Only relocate if the symbol is defined. */ 1066 if (sec) 1067 { 1068 name = bfd_section_name (sec); 1069 1070 if (strcmp (name, ".sdata2") == 0 1071 || strcmp (name, ".sbss2") == 0) 1072 { 1073 if (ro_small_data_pointer == 0) 1074 microblaze_elf_final_sdp (info); 1075 if (ro_small_data_pointer == 0) 1076 { 1077 ret = FALSE; 1078 r = bfd_reloc_undefined; 1079 goto check_reloc; 1080 } 1081 1082 /* At this point `relocation' contains the object's 1083 address. */ 1084 relocation -= ro_small_data_pointer; 1085 /* Now it contains the offset from _SDA2_BASE_. */ 1086 r = _bfd_final_link_relocate (howto, input_bfd, 1087 input_section, 1088 contents, offset, 1089 relocation, addend); 1090 } 1091 else 1092 { 1093 _bfd_error_handler 1094 /* xgettext:c-format */ 1095 (_("%pB: the target (%s) of an %s relocation" 1096 " is in the wrong section (%pA)"), 1097 input_bfd, 1098 sym_name, 1099 microblaze_elf_howto_table[(int) r_type]->name, 1100 sec); 1101 /*bfd_set_error (bfd_error_bad_value); ??? why? */ 1102 ret = FALSE; 1103 continue; 1104 } 1105 } 1106 } 1107 break; 1108 1109 case (int) R_MICROBLAZE_SRW32 : 1110 { 1111 const char *name; 1112 1113 /* Only relocate if the symbol is defined. */ 1114 if (sec) 1115 { 1116 name = bfd_section_name (sec); 1117 1118 if (strcmp (name, ".sdata") == 0 1119 || strcmp (name, ".sbss") == 0) 1120 { 1121 if (rw_small_data_pointer == 0) 1122 microblaze_elf_final_sdp (info); 1123 if (rw_small_data_pointer == 0) 1124 { 1125 ret = FALSE; 1126 r = bfd_reloc_undefined; 1127 goto check_reloc; 1128 } 1129 1130 /* At this point `relocation' contains the object's 1131 address. */ 1132 relocation -= rw_small_data_pointer; 1133 /* Now it contains the offset from _SDA_BASE_. */ 1134 r = _bfd_final_link_relocate (howto, input_bfd, 1135 input_section, 1136 contents, offset, 1137 relocation, addend); 1138 } 1139 else 1140 { 1141 _bfd_error_handler 1142 /* xgettext:c-format */ 1143 (_("%pB: the target (%s) of an %s relocation" 1144 " is in the wrong section (%pA)"), 1145 input_bfd, 1146 sym_name, 1147 microblaze_elf_howto_table[(int) r_type]->name, 1148 sec); 1149 /*bfd_set_error (bfd_error_bad_value); ??? why? */ 1150 ret = FALSE; 1151 continue; 1152 } 1153 } 1154 } 1155 break; 1156 1157 case (int) R_MICROBLAZE_32_SYM_OP_SYM: 1158 break; /* Do nothing. */ 1159 1160 case (int) R_MICROBLAZE_GOTPC_64: 1161 relocation = (htab->elf.sgotplt->output_section->vma 1162 + htab->elf.sgotplt->output_offset); 1163 relocation -= (input_section->output_section->vma 1164 + input_section->output_offset 1165 + offset + INST_WORD_SIZE); 1166 relocation += addend; 1167 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff, 1168 contents + offset + endian); 1169 bfd_put_16 (input_bfd, relocation & 0xffff, 1170 contents + offset + endian + INST_WORD_SIZE); 1171 break; 1172 1173 case (int) R_MICROBLAZE_TEXTPCREL_64: 1174 relocation = input_section->output_section->vma; 1175 relocation -= (input_section->output_section->vma 1176 + input_section->output_offset 1177 + offset + INST_WORD_SIZE); 1178 relocation += addend; 1179 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff, 1180 contents + offset + endian); 1181 bfd_put_16 (input_bfd, relocation & 0xffff, 1182 contents + offset + endian + INST_WORD_SIZE); 1183 break; 1184 1185 case (int) R_MICROBLAZE_PLT_64: 1186 { 1187 bfd_vma immediate; 1188 if (htab->elf.splt != NULL && h != NULL 1189 && h->plt.offset != (bfd_vma) -1) 1190 { 1191 relocation = (htab->elf.splt->output_section->vma 1192 + htab->elf.splt->output_offset 1193 + h->plt.offset); 1194 unresolved_reloc = FALSE; 1195 immediate = relocation - (input_section->output_section->vma 1196 + input_section->output_offset 1197 + offset + INST_WORD_SIZE); 1198 bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff, 1199 contents + offset + endian); 1200 bfd_put_16 (input_bfd, immediate & 0xffff, 1201 contents + offset + endian + INST_WORD_SIZE); 1202 } 1203 else 1204 { 1205 relocation -= (input_section->output_section->vma 1206 + input_section->output_offset 1207 + offset + INST_WORD_SIZE); 1208 immediate = relocation; 1209 bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff, 1210 contents + offset + endian); 1211 bfd_put_16 (input_bfd, immediate & 0xffff, 1212 contents + offset + endian + INST_WORD_SIZE); 1213 } 1214 break; 1215 } 1216 1217 case (int) R_MICROBLAZE_TLSGD: 1218 tls_type = (TLS_TLS | TLS_GD); 1219 goto dogot; 1220 case (int) R_MICROBLAZE_TLSLD: 1221 tls_type = (TLS_TLS | TLS_LD); 1222 /* Fall through. */ 1223 dogot: 1224 case (int) R_MICROBLAZE_GOT_64: 1225 { 1226 bfd_vma *offp; 1227 bfd_vma off, off2; 1228 unsigned long indx; 1229 bfd_vma static_value; 1230 1231 bfd_boolean need_relocs = FALSE; 1232 if (htab->elf.sgot == NULL) 1233 abort (); 1234 1235 indx = 0; 1236 offp = NULL; 1237 1238 /* 1. Identify GOT Offset; 1239 2. Compute Static Values 1240 3. Process Module Id, Process Offset 1241 4. Fixup Relocation with GOT offset value. */ 1242 1243 /* 1. Determine GOT Offset to use : TLS_LD, global, local */ 1244 if (IS_TLS_LD (tls_type)) 1245 offp = &htab->tlsld_got.offset; 1246 else if (h != NULL) 1247 { 1248 if (htab->elf.sgotplt != NULL 1249 && h->got.offset != (bfd_vma) -1) 1250 offp = &h->got.offset; 1251 else 1252 abort (); 1253 } 1254 else 1255 { 1256 if (local_got_offsets == NULL) 1257 abort (); 1258 offp = &local_got_offsets[r_symndx]; 1259 } 1260 1261 if (!offp) 1262 abort (); 1263 1264 off = (*offp) & ~1; 1265 off2 = off; 1266 1267 if (IS_TLS_LD(tls_type) || IS_TLS_GD(tls_type)) 1268 off2 = off + 4; 1269 1270 /* Symbol index to use for relocs */ 1271 if (h != NULL) 1272 { 1273 bfd_boolean dyn = 1274 elf_hash_table (info)->dynamic_sections_created; 1275 1276 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 1277 bfd_link_pic (info), 1278 h) 1279 && (!bfd_link_pic (info) 1280 || !SYMBOL_REFERENCES_LOCAL (info, h))) 1281 indx = h->dynindx; 1282 } 1283 1284 /* Need to generate relocs ? */ 1285 if ((bfd_link_pic (info) || indx != 0) 1286 && (h == NULL 1287 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1288 && !resolved_to_zero) 1289 || h->root.type != bfd_link_hash_undefweak)) 1290 need_relocs = TRUE; 1291 1292 /* 2. Compute/Emit Static value of r-expression */ 1293 static_value = relocation + addend; 1294 1295 /* 3. Process module-id and offset */ 1296 if (! ((*offp) & 1) ) 1297 { 1298 bfd_vma got_offset; 1299 1300 got_offset = (htab->elf.sgot->output_section->vma 1301 + htab->elf.sgot->output_offset 1302 + off); 1303 1304 /* Process module-id */ 1305 if (IS_TLS_LD(tls_type)) 1306 { 1307 if (! bfd_link_pic (info)) 1308 bfd_put_32 (output_bfd, 1, 1309 htab->elf.sgot->contents + off); 1310 else 1311 microblaze_elf_output_dynamic_relocation 1312 (output_bfd, 1313 htab->elf.srelgot, 1314 htab->elf.srelgot->reloc_count++, 1315 /* symindex= */ 0, R_MICROBLAZE_TLSDTPMOD32, 1316 got_offset, 0); 1317 } 1318 else if (IS_TLS_GD(tls_type)) 1319 { 1320 if (! need_relocs) 1321 bfd_put_32 (output_bfd, 1, 1322 htab->elf.sgot->contents + off); 1323 else 1324 microblaze_elf_output_dynamic_relocation 1325 (output_bfd, 1326 htab->elf.srelgot, 1327 htab->elf.srelgot->reloc_count++, 1328 /* symindex= */ indx, R_MICROBLAZE_TLSDTPMOD32, 1329 got_offset, indx ? 0 : static_value); 1330 } 1331 1332 /* Process Offset */ 1333 if (htab->elf.srelgot == NULL) 1334 abort (); 1335 1336 got_offset = (htab->elf.sgot->output_section->vma 1337 + htab->elf.sgot->output_offset 1338 + off2); 1339 if (IS_TLS_LD(tls_type)) 1340 { 1341 /* For LD, offset should be 0 */ 1342 *offp |= 1; 1343 bfd_put_32 (output_bfd, 0, 1344 htab->elf.sgot->contents + off2); 1345 } 1346 else if (IS_TLS_GD(tls_type)) 1347 { 1348 *offp |= 1; 1349 static_value -= dtprel_base(info); 1350 if (need_relocs) 1351 microblaze_elf_output_dynamic_relocation 1352 (output_bfd, 1353 htab->elf.srelgot, 1354 htab->elf.srelgot->reloc_count++, 1355 /* symindex= */ indx, R_MICROBLAZE_TLSDTPREL32, 1356 got_offset, indx ? 0 : static_value); 1357 else 1358 bfd_put_32 (output_bfd, static_value, 1359 htab->elf.sgot->contents + off2); 1360 } 1361 else 1362 { 1363 bfd_put_32 (output_bfd, static_value, 1364 htab->elf.sgot->contents + off2); 1365 1366 /* Relocs for dyn symbols generated by 1367 finish_dynamic_symbols */ 1368 if (bfd_link_pic (info) && h == NULL) 1369 { 1370 *offp |= 1; 1371 microblaze_elf_output_dynamic_relocation 1372 (output_bfd, 1373 htab->elf.srelgot, 1374 htab->elf.srelgot->reloc_count++, 1375 /* symindex= */ indx, R_MICROBLAZE_REL, 1376 got_offset, static_value); 1377 } 1378 } 1379 } 1380 1381 /* 4. Fixup Relocation with GOT offset value 1382 Compute relative address of GOT entry for applying 1383 the current relocation */ 1384 relocation = htab->elf.sgot->output_section->vma 1385 + htab->elf.sgot->output_offset 1386 + off 1387 - htab->elf.sgotplt->output_section->vma 1388 - htab->elf.sgotplt->output_offset; 1389 1390 /* Apply Current Relocation */ 1391 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff, 1392 contents + offset + endian); 1393 bfd_put_16 (input_bfd, relocation & 0xffff, 1394 contents + offset + endian + INST_WORD_SIZE); 1395 1396 unresolved_reloc = FALSE; 1397 break; 1398 } 1399 1400 case (int) R_MICROBLAZE_GOTOFF_64: 1401 { 1402 bfd_vma immediate; 1403 unsigned short lo, high; 1404 relocation += addend; 1405 relocation -= (htab->elf.sgotplt->output_section->vma 1406 + htab->elf.sgotplt->output_offset); 1407 /* Write this value into correct location. */ 1408 immediate = relocation; 1409 lo = immediate & 0x0000ffff; 1410 high = (immediate >> 16) & 0x0000ffff; 1411 bfd_put_16 (input_bfd, high, contents + offset + endian); 1412 bfd_put_16 (input_bfd, lo, 1413 contents + offset + INST_WORD_SIZE + endian); 1414 break; 1415 } 1416 1417 case (int) R_MICROBLAZE_GOTOFF_32: 1418 { 1419 relocation += addend; 1420 relocation -= (htab->elf.sgotplt->output_section->vma 1421 + htab->elf.sgotplt->output_offset); 1422 /* Write this value into correct location. */ 1423 bfd_put_32 (input_bfd, relocation, contents + offset); 1424 break; 1425 } 1426 1427 case (int) R_MICROBLAZE_TLSDTPREL64: 1428 relocation += addend; 1429 relocation -= dtprel_base(info); 1430 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff, 1431 contents + offset + 2); 1432 bfd_put_16 (input_bfd, relocation & 0xffff, 1433 contents + offset + 2 + INST_WORD_SIZE); 1434 break; 1435 case (int) R_MICROBLAZE_TEXTREL_64: 1436 case (int) R_MICROBLAZE_TEXTREL_32_LO: 1437 case (int) R_MICROBLAZE_64_PCREL : 1438 case (int) R_MICROBLAZE_64: 1439 case (int) R_MICROBLAZE_32: 1440 { 1441 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols 1442 from removed linkonce sections, or sections discarded by 1443 a linker script. */ 1444 if (r_symndx == STN_UNDEF || (input_section->flags & SEC_ALLOC) == 0) 1445 { 1446 relocation += addend; 1447 if (r_type == R_MICROBLAZE_32) 1448 bfd_put_32 (input_bfd, relocation, contents + offset); 1449 else 1450 { 1451 if (r_type == R_MICROBLAZE_64_PCREL) 1452 relocation -= (input_section->output_section->vma 1453 + input_section->output_offset 1454 + offset + INST_WORD_SIZE); 1455 else if (r_type == R_MICROBLAZE_TEXTREL_64 1456 || r_type == R_MICROBLAZE_TEXTREL_32_LO) 1457 relocation -= input_section->output_section->vma; 1458 1459 if (r_type == R_MICROBLAZE_TEXTREL_32_LO) 1460 bfd_put_16 (input_bfd, relocation & 0xffff, 1461 contents + offset + endian); 1462 1463 else 1464 { 1465 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff, 1466 contents + offset + endian); 1467 bfd_put_16 (input_bfd, relocation & 0xffff, 1468 contents + offset + endian + INST_WORD_SIZE); 1469 } 1470 } 1471 break; 1472 } 1473 1474 if ((bfd_link_pic (info) 1475 && (h == NULL 1476 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1477 && !resolved_to_zero) 1478 || h->root.type != bfd_link_hash_undefweak) 1479 && (!howto->pc_relative 1480 || (h != NULL 1481 && h->dynindx != -1 1482 && (!info->symbolic 1483 || !h->def_regular)))) 1484 || (!bfd_link_pic (info) 1485 && h != NULL 1486 && h->dynindx != -1 1487 && !h->non_got_ref 1488 && ((h->def_dynamic 1489 && !h->def_regular) 1490 || h->root.type == bfd_link_hash_undefweak 1491 || h->root.type == bfd_link_hash_undefined))) 1492 { 1493 Elf_Internal_Rela outrel; 1494 bfd_byte *loc; 1495 bfd_boolean skip; 1496 1497 /* When generating a shared object, these relocations 1498 are copied into the output file to be resolved at run 1499 time. */ 1500 1501 BFD_ASSERT (sreloc != NULL); 1502 1503 skip = FALSE; 1504 1505 outrel.r_offset = 1506 _bfd_elf_section_offset (output_bfd, info, input_section, 1507 rel->r_offset); 1508 if (outrel.r_offset == (bfd_vma) -1) 1509 skip = TRUE; 1510 else if (outrel.r_offset == (bfd_vma) -2) 1511 skip = TRUE; 1512 outrel.r_offset += (input_section->output_section->vma 1513 + input_section->output_offset); 1514 1515 if (skip) 1516 memset (&outrel, 0, sizeof outrel); 1517 /* h->dynindx may be -1 if the symbol was marked to 1518 become local. */ 1519 else if (h != NULL 1520 && ((! info->symbolic && h->dynindx != -1) 1521 || !h->def_regular)) 1522 { 1523 BFD_ASSERT (h->dynindx != -1); 1524 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 1525 outrel.r_addend = addend; 1526 } 1527 else 1528 { 1529 if (r_type == R_MICROBLAZE_32) 1530 { 1531 outrel.r_info = ELF32_R_INFO (0, R_MICROBLAZE_REL); 1532 outrel.r_addend = relocation + addend; 1533 } 1534 else 1535 { 1536 BFD_FAIL (); 1537 _bfd_error_handler 1538 (_("%pB: probably compiled without -fPIC?"), 1539 input_bfd); 1540 bfd_set_error (bfd_error_bad_value); 1541 return FALSE; 1542 } 1543 } 1544 1545 loc = sreloc->contents; 1546 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 1547 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1548 break; 1549 } 1550 else 1551 { 1552 relocation += addend; 1553 if (r_type == R_MICROBLAZE_32) 1554 bfd_put_32 (input_bfd, relocation, contents + offset); 1555 else 1556 { 1557 if (r_type == R_MICROBLAZE_64_PCREL) 1558 relocation -= (input_section->output_section->vma 1559 + input_section->output_offset 1560 + offset + INST_WORD_SIZE); 1561 else if (r_type == R_MICROBLAZE_TEXTREL_64 1562 || r_type == R_MICROBLAZE_TEXTREL_32_LO) 1563 relocation -= input_section->output_section->vma; 1564 1565 if (r_type == R_MICROBLAZE_TEXTREL_32_LO) 1566 { 1567 bfd_put_16 (input_bfd, relocation & 0xffff, 1568 contents + offset + endian); 1569 } 1570 else 1571 { 1572 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff, 1573 contents + offset + endian); 1574 bfd_put_16 (input_bfd, relocation & 0xffff, 1575 contents + offset + endian 1576 + INST_WORD_SIZE); 1577 } 1578 } 1579 break; 1580 } 1581 } 1582 1583 default : 1584 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 1585 contents, offset, 1586 relocation, addend); 1587 break; 1588 } 1589 } 1590 1591 check_reloc: 1592 1593 if (r != bfd_reloc_ok) 1594 { 1595 /* FIXME: This should be generic enough to go in a utility. */ 1596 const char *name; 1597 1598 if (h != NULL) 1599 name = h->root.root.string; 1600 else 1601 { 1602 name = (bfd_elf_string_from_elf_section 1603 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 1604 if (name == NULL || *name == '\0') 1605 name = bfd_section_name (sec); 1606 } 1607 1608 if (errmsg != NULL) 1609 goto common_error; 1610 1611 switch (r) 1612 { 1613 case bfd_reloc_overflow: 1614 (*info->callbacks->reloc_overflow) 1615 (info, (h ? &h->root : NULL), name, howto->name, 1616 (bfd_vma) 0, input_bfd, input_section, offset); 1617 break; 1618 1619 case bfd_reloc_undefined: 1620 (*info->callbacks->undefined_symbol) 1621 (info, name, input_bfd, input_section, offset, TRUE); 1622 break; 1623 1624 case bfd_reloc_outofrange: 1625 errmsg = _("internal error: out of range error"); 1626 goto common_error; 1627 1628 case bfd_reloc_notsupported: 1629 errmsg = _("internal error: unsupported relocation error"); 1630 goto common_error; 1631 1632 case bfd_reloc_dangerous: 1633 errmsg = _("internal error: dangerous error"); 1634 goto common_error; 1635 1636 default: 1637 errmsg = _("internal error: unknown error"); 1638 /* Fall through. */ 1639 common_error: 1640 (*info->callbacks->warning) (info, errmsg, name, input_bfd, 1641 input_section, offset); 1642 break; 1643 } 1644 } 1645 } 1646 1647 return ret; 1648 } 1649 1650 /* Calculate fixup value for reference. */ 1651 1652 static int 1653 calc_fixup (bfd_vma start, bfd_vma size, asection *sec) 1654 { 1655 bfd_vma end = start + size; 1656 int i, fixup = 0; 1657 1658 if (sec == NULL || sec->relax == NULL) 1659 return 0; 1660 1661 /* Look for addr in relax table, total fixup value. */ 1662 for (i = 0; i < sec->relax_count; i++) 1663 { 1664 if (end <= sec->relax[i].addr) 1665 break; 1666 if ((end != start) && (start > sec->relax[i].addr)) 1667 continue; 1668 fixup += sec->relax[i].size; 1669 } 1670 return fixup; 1671 } 1672 1673 /* Read-modify-write into the bfd, an immediate value into appropriate fields of 1674 a 32-bit instruction. */ 1675 static void 1676 microblaze_bfd_write_imm_value_32 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val) 1677 { 1678 unsigned long instr = bfd_get_32 (abfd, bfd_addr); 1679 instr &= ~0x0000ffff; 1680 instr |= (val & 0x0000ffff); 1681 bfd_put_32 (abfd, instr, bfd_addr); 1682 } 1683 1684 /* Read-modify-write into the bfd, an immediate value into appropriate fields of 1685 two consecutive 32-bit instructions. */ 1686 static void 1687 microblaze_bfd_write_imm_value_64 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val) 1688 { 1689 unsigned long instr_hi; 1690 unsigned long instr_lo; 1691 1692 instr_hi = bfd_get_32 (abfd, bfd_addr); 1693 instr_hi &= ~0x0000ffff; 1694 instr_hi |= ((val >> 16) & 0x0000ffff); 1695 bfd_put_32 (abfd, instr_hi, bfd_addr); 1696 1697 instr_lo = bfd_get_32 (abfd, bfd_addr + INST_WORD_SIZE); 1698 instr_lo &= ~0x0000ffff; 1699 instr_lo |= (val & 0x0000ffff); 1700 bfd_put_32 (abfd, instr_lo, bfd_addr + INST_WORD_SIZE); 1701 } 1702 1703 static bfd_boolean 1704 microblaze_elf_relax_section (bfd *abfd, 1705 asection *sec, 1706 struct bfd_link_info *link_info, 1707 bfd_boolean *again) 1708 { 1709 Elf_Internal_Shdr *symtab_hdr; 1710 Elf_Internal_Rela *internal_relocs; 1711 Elf_Internal_Rela *free_relocs = NULL; 1712 Elf_Internal_Rela *irel, *irelend; 1713 bfd_byte *contents = NULL; 1714 bfd_byte *free_contents = NULL; 1715 int rel_count; 1716 unsigned int shndx; 1717 int i, sym_index; 1718 asection *o; 1719 struct elf_link_hash_entry *sym_hash; 1720 Elf_Internal_Sym *isymbuf, *isymend; 1721 Elf_Internal_Sym *isym; 1722 int symcount; 1723 int offset; 1724 bfd_vma src, dest; 1725 1726 /* We only do this once per section. We may be able to delete some code 1727 by running multiple passes, but it is not worth it. */ 1728 *again = FALSE; 1729 1730 /* Only do this for a text section. */ 1731 if (bfd_link_relocatable (link_info) 1732 || (sec->flags & SEC_RELOC) == 0 1733 || (sec->reloc_count == 0) 1734 || (sec->flags & SEC_CODE) == 0) 1735 return TRUE; 1736 1737 BFD_ASSERT ((sec->size > 0) || (sec->rawsize > 0)); 1738 1739 /* If this is the first time we have been called for this section, 1740 initialize the cooked size. */ 1741 if (sec->size == 0) 1742 sec->size = sec->rawsize; 1743 1744 /* Get symbols for this section. */ 1745 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1746 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 1747 symcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym); 1748 if (isymbuf == NULL) 1749 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, symcount, 1750 0, NULL, NULL, NULL); 1751 BFD_ASSERT (isymbuf != NULL); 1752 1753 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory); 1754 if (internal_relocs == NULL) 1755 goto error_return; 1756 if (! link_info->keep_memory) 1757 free_relocs = internal_relocs; 1758 1759 sec->relax = (struct relax_table *) bfd_malloc ((sec->reloc_count + 1) 1760 * sizeof (struct relax_table)); 1761 if (sec->relax == NULL) 1762 goto error_return; 1763 sec->relax_count = 0; 1764 1765 irelend = internal_relocs + sec->reloc_count; 1766 rel_count = 0; 1767 for (irel = internal_relocs; irel < irelend; irel++, rel_count++) 1768 { 1769 bfd_vma symval; 1770 if ((ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64_PCREL) 1771 && (ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64) 1772 && (ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_TEXTREL_64)) 1773 continue; /* Can't delete this reloc. */ 1774 1775 /* Get the section contents. */ 1776 if (contents == NULL) 1777 { 1778 if (elf_section_data (sec)->this_hdr.contents != NULL) 1779 contents = elf_section_data (sec)->this_hdr.contents; 1780 else 1781 { 1782 contents = (bfd_byte *) bfd_malloc (sec->size); 1783 if (contents == NULL) 1784 goto error_return; 1785 free_contents = contents; 1786 1787 if (!bfd_get_section_contents (abfd, sec, contents, 1788 (file_ptr) 0, sec->size)) 1789 goto error_return; 1790 elf_section_data (sec)->this_hdr.contents = contents; 1791 } 1792 } 1793 1794 /* Get the value of the symbol referred to by the reloc. */ 1795 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 1796 { 1797 /* A local symbol. */ 1798 asection *sym_sec; 1799 1800 isym = isymbuf + ELF32_R_SYM (irel->r_info); 1801 if (isym->st_shndx == SHN_UNDEF) 1802 sym_sec = bfd_und_section_ptr; 1803 else if (isym->st_shndx == SHN_ABS) 1804 sym_sec = bfd_abs_section_ptr; 1805 else if (isym->st_shndx == SHN_COMMON) 1806 sym_sec = bfd_com_section_ptr; 1807 else 1808 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); 1809 1810 symval = _bfd_elf_rela_local_sym (abfd, isym, &sym_sec, irel); 1811 } 1812 else 1813 { 1814 unsigned long indx; 1815 struct elf_link_hash_entry *h; 1816 1817 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 1818 h = elf_sym_hashes (abfd)[indx]; 1819 BFD_ASSERT (h != NULL); 1820 1821 if (h->root.type != bfd_link_hash_defined 1822 && h->root.type != bfd_link_hash_defweak) 1823 /* This appears to be a reference to an undefined 1824 symbol. Just ignore it--it will be caught by the 1825 regular reloc processing. */ 1826 continue; 1827 1828 symval = (h->root.u.def.value 1829 + h->root.u.def.section->output_section->vma 1830 + h->root.u.def.section->output_offset); 1831 } 1832 1833 /* If this is a PC-relative reloc, subtract the instr offset from 1834 the symbol value. */ 1835 if (ELF32_R_TYPE (irel->r_info) == (int) R_MICROBLAZE_64_PCREL) 1836 { 1837 symval = symval + irel->r_addend 1838 - (irel->r_offset 1839 + sec->output_section->vma 1840 + sec->output_offset); 1841 } 1842 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MICROBLAZE_TEXTREL_64) 1843 { 1844 symval = symval + irel->r_addend - (sec->output_section->vma); 1845 } 1846 else 1847 symval += irel->r_addend; 1848 1849 if ((symval & 0xffff8000) == 0 1850 || (symval & 0xffff8000) == 0xffff8000) 1851 { 1852 /* We can delete this instruction. */ 1853 sec->relax[sec->relax_count].addr = irel->r_offset; 1854 sec->relax[sec->relax_count].size = INST_WORD_SIZE; 1855 sec->relax_count++; 1856 1857 /* Rewrite relocation type. */ 1858 switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info)) 1859 { 1860 case R_MICROBLAZE_64_PCREL: 1861 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 1862 (int) R_MICROBLAZE_32_PCREL_LO); 1863 break; 1864 case R_MICROBLAZE_64: 1865 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 1866 (int) R_MICROBLAZE_32_LO); 1867 break; 1868 case R_MICROBLAZE_TEXTREL_64: 1869 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 1870 (int) R_MICROBLAZE_TEXTREL_32_LO); 1871 break; 1872 default: 1873 /* Cannot happen. */ 1874 BFD_ASSERT (FALSE); 1875 } 1876 } 1877 } /* Loop through all relocations. */ 1878 1879 /* Loop through the relocs again, and see if anything needs to change. */ 1880 if (sec->relax_count > 0) 1881 { 1882 shndx = _bfd_elf_section_from_bfd_section (abfd, sec); 1883 rel_count = 0; 1884 sec->relax[sec->relax_count].addr = sec->size; 1885 1886 for (irel = internal_relocs; irel < irelend; irel++, rel_count++) 1887 { 1888 bfd_vma nraddr; 1889 1890 /* Get the new reloc address. */ 1891 nraddr = irel->r_offset - calc_fixup (irel->r_offset, 0, sec); 1892 switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info)) 1893 { 1894 default: 1895 break; 1896 case R_MICROBLAZE_64_PCREL: 1897 break; 1898 case R_MICROBLAZE_TEXTREL_64: 1899 case R_MICROBLAZE_TEXTREL_32_LO: 1900 case R_MICROBLAZE_64: 1901 case R_MICROBLAZE_32_LO: 1902 /* If this reloc is against a symbol defined in this 1903 section, we must check the addend to see it will put the value in 1904 range to be adjusted, and hence must be changed. */ 1905 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 1906 { 1907 isym = isymbuf + ELF32_R_SYM (irel->r_info); 1908 /* Only handle relocs against .text. */ 1909 if (isym->st_shndx == shndx 1910 && ELF32_ST_TYPE (isym->st_info) == STT_SECTION) 1911 irel->r_addend -= calc_fixup (irel->r_addend, 0, sec); 1912 } 1913 break; 1914 case R_MICROBLAZE_NONE: 1915 { 1916 /* This was a PC-relative instruction that was 1917 completely resolved. */ 1918 int sfix, efix; 1919 bfd_vma target_address; 1920 target_address = irel->r_addend + irel->r_offset; 1921 sfix = calc_fixup (irel->r_offset, 0, sec); 1922 efix = calc_fixup (target_address, 0, sec); 1923 irel->r_addend -= (efix - sfix); 1924 /* Should use HOWTO. */ 1925 microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset, 1926 irel->r_addend); 1927 } 1928 break; 1929 case R_MICROBLAZE_64_NONE: 1930 { 1931 /* This was a PC-relative 64-bit instruction that was 1932 completely resolved. */ 1933 int sfix, efix; 1934 bfd_vma target_address; 1935 target_address = irel->r_addend + irel->r_offset + INST_WORD_SIZE; 1936 sfix = calc_fixup (irel->r_offset + INST_WORD_SIZE, 0, sec); 1937 efix = calc_fixup (target_address, 0, sec); 1938 irel->r_addend -= (efix - sfix); 1939 microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset 1940 + INST_WORD_SIZE, irel->r_addend); 1941 } 1942 break; 1943 } 1944 irel->r_offset = nraddr; 1945 } /* Change all relocs in this section. */ 1946 1947 /* Look through all other sections. */ 1948 for (o = abfd->sections; o != NULL; o = o->next) 1949 { 1950 Elf_Internal_Rela *irelocs; 1951 Elf_Internal_Rela *irelscan, *irelscanend; 1952 bfd_byte *ocontents; 1953 1954 if (o == sec 1955 || (o->flags & SEC_RELOC) == 0 1956 || o->reloc_count == 0) 1957 continue; 1958 1959 /* We always cache the relocs. Perhaps, if info->keep_memory is 1960 FALSE, we should free them, if we are permitted to. */ 1961 1962 irelocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, TRUE); 1963 if (irelocs == NULL) 1964 goto error_return; 1965 1966 ocontents = NULL; 1967 irelscanend = irelocs + o->reloc_count; 1968 for (irelscan = irelocs; irelscan < irelscanend; irelscan++) 1969 { 1970 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32) 1971 { 1972 isym = isymbuf + ELF32_R_SYM (irelscan->r_info); 1973 1974 /* Look at the reloc only if the value has been resolved. */ 1975 if (isym->st_shndx == shndx 1976 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION)) 1977 { 1978 if (ocontents == NULL) 1979 { 1980 if (elf_section_data (o)->this_hdr.contents != NULL) 1981 ocontents = elf_section_data (o)->this_hdr.contents; 1982 else 1983 { 1984 /* We always cache the section contents. 1985 Perhaps, if info->keep_memory is FALSE, we 1986 should free them, if we are permitted to. */ 1987 if (o->rawsize == 0) 1988 o->rawsize = o->size; 1989 ocontents = (bfd_byte *) bfd_malloc (o->rawsize); 1990 if (ocontents == NULL) 1991 goto error_return; 1992 if (!bfd_get_section_contents (abfd, o, ocontents, 1993 (file_ptr) 0, 1994 o->rawsize)) 1995 goto error_return; 1996 elf_section_data (o)->this_hdr.contents = ocontents; 1997 } 1998 1999 } 2000 irelscan->r_addend -= calc_fixup (irelscan->r_addend, 0, sec); 2001 } 2002 else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_SYM_OP_SYM) 2003 { 2004 isym = isymbuf + ELF32_R_SYM (irelscan->r_info); 2005 2006 /* Look at the reloc only if the value has been resolved. */ 2007 if (ocontents == NULL) 2008 { 2009 if (elf_section_data (o)->this_hdr.contents != NULL) 2010 ocontents = elf_section_data (o)->this_hdr.contents; 2011 else 2012 { 2013 /* We always cache the section contents. 2014 Perhaps, if info->keep_memory is FALSE, we 2015 should free them, if we are permitted to. */ 2016 2017 if (o->rawsize == 0) 2018 o->rawsize = o->size; 2019 ocontents = (bfd_byte *) bfd_malloc (o->rawsize); 2020 if (ocontents == NULL) 2021 goto error_return; 2022 if (!bfd_get_section_contents (abfd, o, ocontents, 2023 (file_ptr) 0, 2024 o->rawsize)) 2025 goto error_return; 2026 elf_section_data (o)->this_hdr.contents = ocontents; 2027 } 2028 } 2029 irelscan->r_addend -= calc_fixup (irel->r_addend 2030 + isym->st_value, 2031 0, 2032 sec); 2033 } 2034 } 2035 else if ((ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_PCREL_LO) 2036 || (ELF32_R_TYPE (irelscan->r_info) 2037 == (int) R_MICROBLAZE_32_LO) 2038 || (ELF32_R_TYPE (irelscan->r_info) 2039 == (int) R_MICROBLAZE_TEXTREL_32_LO)) 2040 { 2041 isym = isymbuf + ELF32_R_SYM (irelscan->r_info); 2042 2043 /* Look at the reloc only if the value has been resolved. */ 2044 if (isym->st_shndx == shndx 2045 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION)) 2046 { 2047 bfd_vma immediate; 2048 bfd_vma target_address; 2049 2050 if (ocontents == NULL) 2051 { 2052 if (elf_section_data (o)->this_hdr.contents != NULL) 2053 ocontents = elf_section_data (o)->this_hdr.contents; 2054 else 2055 { 2056 /* We always cache the section contents. 2057 Perhaps, if info->keep_memory is FALSE, we 2058 should free them, if we are permitted to. */ 2059 if (o->rawsize == 0) 2060 o->rawsize = o->size; 2061 ocontents = (bfd_byte *) bfd_malloc (o->rawsize); 2062 if (ocontents == NULL) 2063 goto error_return; 2064 if (!bfd_get_section_contents (abfd, o, ocontents, 2065 (file_ptr) 0, 2066 o->rawsize)) 2067 goto error_return; 2068 elf_section_data (o)->this_hdr.contents = ocontents; 2069 } 2070 } 2071 2072 unsigned long instr = bfd_get_32 (abfd, ocontents + irelscan->r_offset); 2073 immediate = instr & 0x0000ffff; 2074 target_address = immediate; 2075 offset = calc_fixup (target_address, 0, sec); 2076 immediate -= offset; 2077 irelscan->r_addend -= offset; 2078 microblaze_bfd_write_imm_value_32 (abfd, ocontents + irelscan->r_offset, 2079 irelscan->r_addend); 2080 } 2081 } 2082 2083 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64 2084 || (ELF32_R_TYPE (irelscan->r_info) 2085 == (int) R_MICROBLAZE_TEXTREL_64)) 2086 { 2087 isym = isymbuf + ELF32_R_SYM (irelscan->r_info); 2088 2089 /* Look at the reloc only if the value has been resolved. */ 2090 if (isym->st_shndx == shndx 2091 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION)) 2092 { 2093 bfd_vma immediate; 2094 2095 if (ocontents == NULL) 2096 { 2097 if (elf_section_data (o)->this_hdr.contents != NULL) 2098 ocontents = elf_section_data (o)->this_hdr.contents; 2099 else 2100 { 2101 /* We always cache the section contents. 2102 Perhaps, if info->keep_memory is FALSE, we 2103 should free them, if we are permitted to. */ 2104 2105 if (o->rawsize == 0) 2106 o->rawsize = o->size; 2107 ocontents = (bfd_byte *) bfd_malloc (o->rawsize); 2108 if (ocontents == NULL) 2109 goto error_return; 2110 if (!bfd_get_section_contents (abfd, o, ocontents, 2111 (file_ptr) 0, 2112 o->rawsize)) 2113 goto error_return; 2114 elf_section_data (o)->this_hdr.contents = ocontents; 2115 } 2116 } 2117 unsigned long instr_hi = bfd_get_32 (abfd, ocontents 2118 + irelscan->r_offset); 2119 unsigned long instr_lo = bfd_get_32 (abfd, ocontents 2120 + irelscan->r_offset 2121 + INST_WORD_SIZE); 2122 immediate = (instr_hi & 0x0000ffff) << 16; 2123 immediate |= (instr_lo & 0x0000ffff); 2124 offset = calc_fixup (irelscan->r_addend, 0, sec); 2125 immediate -= offset; 2126 irelscan->r_addend -= offset; 2127 } 2128 } 2129 else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64_PCREL) 2130 { 2131 isym = isymbuf + ELF32_R_SYM (irelscan->r_info); 2132 2133 /* Look at the reloc only if the value has been resolved. */ 2134 if (isym->st_shndx == shndx 2135 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION)) 2136 { 2137 bfd_vma immediate; 2138 bfd_vma target_address; 2139 2140 if (ocontents == NULL) 2141 { 2142 if (elf_section_data (o)->this_hdr.contents != NULL) 2143 ocontents = elf_section_data (o)->this_hdr.contents; 2144 else 2145 { 2146 /* We always cache the section contents. 2147 Perhaps, if info->keep_memory is FALSE, we 2148 should free them, if we are permitted to. */ 2149 if (o->rawsize == 0) 2150 o->rawsize = o->size; 2151 ocontents = (bfd_byte *) bfd_malloc (o->rawsize); 2152 if (ocontents == NULL) 2153 goto error_return; 2154 if (!bfd_get_section_contents (abfd, o, ocontents, 2155 (file_ptr) 0, 2156 o->rawsize)) 2157 goto error_return; 2158 elf_section_data (o)->this_hdr.contents = ocontents; 2159 } 2160 } 2161 unsigned long instr_hi = bfd_get_32 (abfd, ocontents 2162 + irelscan->r_offset); 2163 unsigned long instr_lo = bfd_get_32 (abfd, ocontents 2164 + irelscan->r_offset 2165 + INST_WORD_SIZE); 2166 immediate = (instr_hi & 0x0000ffff) << 16; 2167 immediate |= (instr_lo & 0x0000ffff); 2168 target_address = immediate; 2169 offset = calc_fixup (target_address, 0, sec); 2170 immediate -= offset; 2171 irelscan->r_addend -= offset; 2172 microblaze_bfd_write_imm_value_64 (abfd, ocontents 2173 + irelscan->r_offset, immediate); 2174 } 2175 } 2176 } 2177 } 2178 2179 /* Adjust the local symbols defined in this section. */ 2180 isymend = isymbuf + symtab_hdr->sh_info; 2181 for (isym = isymbuf; isym < isymend; isym++) 2182 { 2183 if (isym->st_shndx == shndx) 2184 { 2185 isym->st_value -= calc_fixup (isym->st_value, 0, sec); 2186 if (isym->st_size) 2187 isym->st_size -= calc_fixup (isym->st_value, isym->st_size, sec); 2188 } 2189 } 2190 2191 /* Now adjust the global symbols defined in this section. */ 2192 isym = isymbuf + symtab_hdr->sh_info; 2193 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)) - symtab_hdr->sh_info; 2194 for (sym_index = 0; sym_index < symcount; sym_index++) 2195 { 2196 sym_hash = elf_sym_hashes (abfd)[sym_index]; 2197 if ((sym_hash->root.type == bfd_link_hash_defined 2198 || sym_hash->root.type == bfd_link_hash_defweak) 2199 && sym_hash->root.u.def.section == sec) 2200 { 2201 sym_hash->root.u.def.value -= calc_fixup (sym_hash->root.u.def.value, 2202 0, sec); 2203 if (sym_hash->size) 2204 sym_hash->size -= calc_fixup (sym_hash->root.u.def.value, 2205 sym_hash->size, sec); 2206 } 2207 } 2208 2209 /* Physically move the code and change the cooked size. */ 2210 dest = sec->relax[0].addr; 2211 for (i = 0; i < sec->relax_count; i++) 2212 { 2213 int len; 2214 src = sec->relax[i].addr + sec->relax[i].size; 2215 len = sec->relax[i+1].addr - sec->relax[i].addr - sec->relax[i].size; 2216 2217 memmove (contents + dest, contents + src, len); 2218 sec->size -= sec->relax[i].size; 2219 dest += len; 2220 } 2221 2222 elf_section_data (sec)->relocs = internal_relocs; 2223 free_relocs = NULL; 2224 2225 elf_section_data (sec)->this_hdr.contents = contents; 2226 free_contents = NULL; 2227 2228 symtab_hdr->contents = (bfd_byte *) isymbuf; 2229 } 2230 2231 free (free_relocs); 2232 free_relocs = NULL; 2233 2234 if (free_contents != NULL) 2235 { 2236 if (!link_info->keep_memory) 2237 free (free_contents); 2238 else 2239 /* Cache the section contents for elf_link_input_bfd. */ 2240 elf_section_data (sec)->this_hdr.contents = contents; 2241 free_contents = NULL; 2242 } 2243 2244 if (sec->relax_count == 0) 2245 { 2246 *again = FALSE; 2247 free (sec->relax); 2248 sec->relax = NULL; 2249 } 2250 else 2251 *again = TRUE; 2252 return TRUE; 2253 2254 error_return: 2255 free (free_relocs); 2256 free (free_contents); 2257 free (sec->relax); 2258 sec->relax = NULL; 2259 sec->relax_count = 0; 2260 return FALSE; 2261 } 2262 2263 /* Return the section that should be marked against GC for a given 2264 relocation. */ 2265 2266 static asection * 2267 microblaze_elf_gc_mark_hook (asection *sec, 2268 struct bfd_link_info * info, 2269 Elf_Internal_Rela * rel, 2270 struct elf_link_hash_entry * h, 2271 Elf_Internal_Sym * sym) 2272 { 2273 if (h != NULL) 2274 switch (ELF32_R_TYPE (rel->r_info)) 2275 { 2276 case R_MICROBLAZE_GNU_VTINHERIT: 2277 case R_MICROBLAZE_GNU_VTENTRY: 2278 return NULL; 2279 } 2280 2281 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 2282 } 2283 2284 /* PIC support. */ 2285 2286 #define PLT_ENTRY_SIZE 16 2287 2288 #define PLT_ENTRY_WORD_0 0xb0000000 /* "imm 0". */ 2289 #define PLT_ENTRY_WORD_1 0xe9940000 /* "lwi r12,r20,0" - relocated to lwi r12,r20,func@GOT. */ 2290 #define PLT_ENTRY_WORD_1_NOPIC 0xe9800000 /* "lwi r12,r0,0" - non-PIC object. */ 2291 #define PLT_ENTRY_WORD_2 0x98186000 /* "brad r12". */ 2292 #define PLT_ENTRY_WORD_3 0x80000000 /* "nop". */ 2293 2294 static bfd_boolean 2295 update_local_sym_info (bfd *abfd, 2296 Elf_Internal_Shdr *symtab_hdr, 2297 unsigned long r_symndx, 2298 unsigned int tls_type) 2299 { 2300 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); 2301 unsigned char *local_got_tls_masks; 2302 2303 if (local_got_refcounts == NULL) 2304 { 2305 bfd_size_type size = symtab_hdr->sh_info; 2306 2307 size *= (sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks)); 2308 local_got_refcounts = bfd_zalloc (abfd, size); 2309 if (local_got_refcounts == NULL) 2310 return FALSE; 2311 elf_local_got_refcounts (abfd) = local_got_refcounts; 2312 } 2313 2314 local_got_tls_masks = 2315 (unsigned char *) (local_got_refcounts + symtab_hdr->sh_info); 2316 local_got_tls_masks[r_symndx] |= tls_type; 2317 local_got_refcounts[r_symndx] += 1; 2318 2319 return TRUE; 2320 } 2321 /* Look through the relocs for a section during the first phase. */ 2322 2323 static bfd_boolean 2324 microblaze_elf_check_relocs (bfd * abfd, 2325 struct bfd_link_info * info, 2326 asection * sec, 2327 const Elf_Internal_Rela * relocs) 2328 { 2329 Elf_Internal_Shdr * symtab_hdr; 2330 struct elf_link_hash_entry ** sym_hashes; 2331 struct elf_link_hash_entry ** sym_hashes_end; 2332 const Elf_Internal_Rela * rel; 2333 const Elf_Internal_Rela * rel_end; 2334 struct elf32_mb_link_hash_table *htab; 2335 asection *sreloc = NULL; 2336 2337 if (bfd_link_relocatable (info)) 2338 return TRUE; 2339 2340 htab = elf32_mb_hash_table (info); 2341 if (htab == NULL) 2342 return FALSE; 2343 2344 symtab_hdr = & elf_tdata (abfd)->symtab_hdr; 2345 sym_hashes = elf_sym_hashes (abfd); 2346 sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); 2347 if (!elf_bad_symtab (abfd)) 2348 sym_hashes_end -= symtab_hdr->sh_info; 2349 2350 rel_end = relocs + sec->reloc_count; 2351 2352 for (rel = relocs; rel < rel_end; rel++) 2353 { 2354 unsigned int r_type; 2355 struct elf_link_hash_entry * h; 2356 unsigned long r_symndx; 2357 unsigned char tls_type = 0; 2358 2359 r_symndx = ELF32_R_SYM (rel->r_info); 2360 r_type = ELF32_R_TYPE (rel->r_info); 2361 2362 if (r_symndx < symtab_hdr->sh_info) 2363 h = NULL; 2364 else 2365 { 2366 h = sym_hashes [r_symndx - symtab_hdr->sh_info]; 2367 while (h->root.type == bfd_link_hash_indirect 2368 || h->root.type == bfd_link_hash_warning) 2369 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2370 } 2371 2372 switch (r_type) 2373 { 2374 /* This relocation describes the C++ object vtable hierarchy. 2375 Reconstruct it for later use during GC. */ 2376 case R_MICROBLAZE_GNU_VTINHERIT: 2377 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 2378 return FALSE; 2379 break; 2380 2381 /* This relocation describes which C++ vtable entries are actually 2382 used. Record for later use during GC. */ 2383 case R_MICROBLAZE_GNU_VTENTRY: 2384 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 2385 return FALSE; 2386 break; 2387 2388 /* This relocation requires .plt entry. */ 2389 case R_MICROBLAZE_PLT_64: 2390 if (h != NULL) 2391 { 2392 h->needs_plt = 1; 2393 h->plt.refcount += 1; 2394 } 2395 break; 2396 2397 /* This relocation requires .got entry. */ 2398 case R_MICROBLAZE_TLSGD: 2399 tls_type |= (TLS_TLS | TLS_GD); 2400 goto dogottls; 2401 case R_MICROBLAZE_TLSLD: 2402 tls_type |= (TLS_TLS | TLS_LD); 2403 /* Fall through. */ 2404 dogottls: 2405 sec->has_tls_reloc = 1; 2406 /* Fall through. */ 2407 case R_MICROBLAZE_GOT_64: 2408 if (htab->elf.sgot == NULL) 2409 { 2410 if (htab->elf.dynobj == NULL) 2411 htab->elf.dynobj = abfd; 2412 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) 2413 return FALSE; 2414 } 2415 if (h != NULL) 2416 { 2417 h->got.refcount += 1; 2418 elf32_mb_hash_entry (h)->tls_mask |= tls_type; 2419 } 2420 else 2421 { 2422 if (! update_local_sym_info(abfd, symtab_hdr, r_symndx, tls_type) ) 2423 return FALSE; 2424 } 2425 break; 2426 2427 case R_MICROBLAZE_GOTOFF_64: 2428 case R_MICROBLAZE_GOTOFF_32: 2429 if (htab->elf.sgot == NULL) 2430 { 2431 if (htab->elf.dynobj == NULL) 2432 htab->elf.dynobj = abfd; 2433 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) 2434 return FALSE; 2435 } 2436 break; 2437 2438 case R_MICROBLAZE_64: 2439 case R_MICROBLAZE_64_PCREL: 2440 case R_MICROBLAZE_32: 2441 { 2442 if (h != NULL && !bfd_link_pic (info)) 2443 { 2444 /* we may need a copy reloc. */ 2445 h->non_got_ref = 1; 2446 2447 /* we may also need a .plt entry. */ 2448 h->plt.refcount += 1; 2449 if (ELF32_R_TYPE (rel->r_info) != R_MICROBLAZE_64_PCREL) 2450 h->pointer_equality_needed = 1; 2451 } 2452 2453 2454 /* If we are creating a shared library, and this is a reloc 2455 against a global symbol, or a non PC relative reloc 2456 against a local symbol, then we need to copy the reloc 2457 into the shared library. However, if we are linking with 2458 -Bsymbolic, we do not need to copy a reloc against a 2459 global symbol which is defined in an object we are 2460 including in the link (i.e., DEF_REGULAR is set). At 2461 this point we have not seen all the input files, so it is 2462 possible that DEF_REGULAR is not set now but will be set 2463 later (it is never cleared). In case of a weak definition, 2464 DEF_REGULAR may be cleared later by a strong definition in 2465 a shared library. We account for that possibility below by 2466 storing information in the relocs_copied field of the hash 2467 table entry. A similar situation occurs when creating 2468 shared libraries and symbol visibility changes render the 2469 symbol local. 2470 2471 If on the other hand, we are creating an executable, we 2472 may need to keep relocations for symbols satisfied by a 2473 dynamic library if we manage to avoid copy relocs for the 2474 symbol. */ 2475 2476 if ((bfd_link_pic (info) 2477 && (sec->flags & SEC_ALLOC) != 0 2478 && (r_type != R_MICROBLAZE_64_PCREL 2479 || (h != NULL 2480 && (! info->symbolic 2481 || h->root.type == bfd_link_hash_defweak 2482 || !h->def_regular)))) 2483 || (!bfd_link_pic (info) 2484 && (sec->flags & SEC_ALLOC) != 0 2485 && h != NULL 2486 && (h->root.type == bfd_link_hash_defweak 2487 || !h->def_regular))) 2488 { 2489 struct elf_dyn_relocs *p; 2490 struct elf_dyn_relocs **head; 2491 2492 /* When creating a shared object, we must copy these 2493 relocs into the output file. We create a reloc 2494 section in dynobj and make room for the reloc. */ 2495 2496 if (sreloc == NULL) 2497 { 2498 bfd *dynobj; 2499 2500 if (htab->elf.dynobj == NULL) 2501 htab->elf.dynobj = abfd; 2502 dynobj = htab->elf.dynobj; 2503 2504 sreloc = _bfd_elf_make_dynamic_reloc_section (sec, dynobj, 2505 2, abfd, 1); 2506 if (sreloc == NULL) 2507 return FALSE; 2508 } 2509 2510 /* If this is a global symbol, we count the number of 2511 relocations we need for this symbol. */ 2512 if (h != NULL) 2513 head = &h->dyn_relocs; 2514 else 2515 { 2516 /* Track dynamic relocs needed for local syms too. 2517 We really need local syms available to do this 2518 easily. Oh well. */ 2519 2520 asection *s; 2521 Elf_Internal_Sym *isym; 2522 void *vpp; 2523 2524 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, 2525 abfd, r_symndx); 2526 if (isym == NULL) 2527 return FALSE; 2528 2529 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 2530 if (s == NULL) 2531 return FALSE; 2532 2533 vpp = &elf_section_data (s)->local_dynrel; 2534 head = (struct elf_dyn_relocs **) vpp; 2535 } 2536 2537 p = *head; 2538 if (p == NULL || p->sec != sec) 2539 { 2540 size_t amt = sizeof *p; 2541 p = ((struct elf_dyn_relocs *) 2542 bfd_alloc (htab->elf.dynobj, amt)); 2543 if (p == NULL) 2544 return FALSE; 2545 p->next = *head; 2546 *head = p; 2547 p->sec = sec; 2548 p->count = 0; 2549 p->pc_count = 0; 2550 } 2551 2552 p->count += 1; 2553 if (r_type == R_MICROBLAZE_64_PCREL) 2554 p->pc_count += 1; 2555 } 2556 } 2557 break; 2558 } 2559 } 2560 2561 return TRUE; 2562 } 2563 2564 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 2565 2566 static void 2567 microblaze_elf_copy_indirect_symbol (struct bfd_link_info *info, 2568 struct elf_link_hash_entry *dir, 2569 struct elf_link_hash_entry *ind) 2570 { 2571 struct elf32_mb_link_hash_entry *edir, *eind; 2572 2573 edir = (struct elf32_mb_link_hash_entry *) dir; 2574 eind = (struct elf32_mb_link_hash_entry *) ind; 2575 2576 edir->tls_mask |= eind->tls_mask; 2577 2578 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 2579 } 2580 2581 static bfd_boolean 2582 microblaze_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 2583 struct elf_link_hash_entry *h) 2584 { 2585 struct elf32_mb_link_hash_table *htab; 2586 asection *s, *srel; 2587 unsigned int power_of_two; 2588 2589 htab = elf32_mb_hash_table (info); 2590 if (htab == NULL) 2591 return FALSE; 2592 2593 /* If this is a function, put it in the procedure linkage table. We 2594 will fill in the contents of the procedure linkage table later, 2595 when we know the address of the .got section. */ 2596 if (h->type == STT_FUNC 2597 || h->needs_plt) 2598 { 2599 if (h->plt.refcount <= 0 2600 || SYMBOL_CALLS_LOCAL (info, h) 2601 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 2602 && h->root.type == bfd_link_hash_undefweak)) 2603 { 2604 /* This case can occur if we saw a PLT reloc in an input 2605 file, but the symbol was never referred to by a dynamic 2606 object, or if all references were garbage collected. In 2607 such a case, we don't actually need to build a procedure 2608 linkage table, and we can just do a PC32 reloc instead. */ 2609 h->plt.offset = (bfd_vma) -1; 2610 h->needs_plt = 0; 2611 } 2612 2613 return TRUE; 2614 } 2615 else 2616 /* It's possible that we incorrectly decided a .plt reloc was 2617 needed for an R_MICROBLAZE_64_PCREL reloc to a non-function sym in 2618 check_relocs. We can't decide accurately between function and 2619 non-function syms in check-relocs; Objects loaded later in 2620 the link may change h->type. So fix it now. */ 2621 h->plt.offset = (bfd_vma) -1; 2622 2623 /* If this is a weak symbol, and there is a real definition, the 2624 processor independent code will have arranged for us to see the 2625 real definition first, and we can just use the same value. */ 2626 if (h->is_weakalias) 2627 { 2628 struct elf_link_hash_entry *def = weakdef (h); 2629 BFD_ASSERT (def->root.type == bfd_link_hash_defined); 2630 h->root.u.def.section = def->root.u.def.section; 2631 h->root.u.def.value = def->root.u.def.value; 2632 return TRUE; 2633 } 2634 2635 /* This is a reference to a symbol defined by a dynamic object which 2636 is not a function. */ 2637 2638 /* If we are creating a shared library, we must presume that the 2639 only references to the symbol are via the global offset table. 2640 For such cases we need not do anything here; the relocations will 2641 be handled correctly by relocate_section. */ 2642 if (bfd_link_pic (info)) 2643 return TRUE; 2644 2645 /* If there are no references to this symbol that do not use the 2646 GOT, we don't need to generate a copy reloc. */ 2647 if (!h->non_got_ref) 2648 return TRUE; 2649 2650 /* If -z nocopyreloc was given, we won't generate them either. */ 2651 if (info->nocopyreloc) 2652 { 2653 h->non_got_ref = 0; 2654 return TRUE; 2655 } 2656 2657 /* If we don't find any dynamic relocs in read-only sections, then 2658 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 2659 if (!_bfd_elf_readonly_dynrelocs (h)) 2660 { 2661 h->non_got_ref = 0; 2662 return TRUE; 2663 } 2664 2665 /* We must allocate the symbol in our .dynbss section, which will 2666 become part of the .bss section of the executable. There will be 2667 an entry for this symbol in the .dynsym section. The dynamic 2668 object will contain position independent code, so all references 2669 from the dynamic object to this symbol will go through the global 2670 offset table. The dynamic linker will use the .dynsym entry to 2671 determine the address it must put in the global offset table, so 2672 both the dynamic object and the regular object will refer to the 2673 same memory location for the variable. */ 2674 2675 /* We must generate a R_MICROBLAZE_COPY reloc to tell the dynamic linker 2676 to copy the initial value out of the dynamic object and into the 2677 runtime process image. */ 2678 if ((h->root.u.def.section->flags & SEC_READONLY) != 0) 2679 { 2680 s = htab->elf.sdynrelro; 2681 srel = htab->elf.sreldynrelro; 2682 } 2683 else 2684 { 2685 s = htab->elf.sdynbss; 2686 srel = htab->elf.srelbss; 2687 } 2688 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) 2689 { 2690 srel->size += sizeof (Elf32_External_Rela); 2691 h->needs_copy = 1; 2692 } 2693 2694 /* We need to figure out the alignment required for this symbol. I 2695 have no idea how ELF linkers handle this. */ 2696 power_of_two = bfd_log2 (h->size); 2697 if (power_of_two > 3) 2698 power_of_two = 3; 2699 2700 /* Apply the required alignment. */ 2701 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); 2702 if (power_of_two > s->alignment_power) 2703 { 2704 if (!bfd_set_section_alignment (s, power_of_two)) 2705 return FALSE; 2706 } 2707 2708 /* Define the symbol as being at this point in the section. */ 2709 h->root.u.def.section = s; 2710 h->root.u.def.value = s->size; 2711 2712 /* Increment the section size to make room for the symbol. */ 2713 s->size += h->size; 2714 return TRUE; 2715 } 2716 2717 /* Allocate space in .plt, .got and associated reloc sections for 2718 dynamic relocs. */ 2719 2720 static bfd_boolean 2721 allocate_dynrelocs (struct elf_link_hash_entry *h, void * dat) 2722 { 2723 struct bfd_link_info *info; 2724 struct elf32_mb_link_hash_table *htab; 2725 struct elf32_mb_link_hash_entry *eh; 2726 struct elf_dyn_relocs *p; 2727 2728 if (h->root.type == bfd_link_hash_indirect) 2729 return TRUE; 2730 2731 info = (struct bfd_link_info *) dat; 2732 htab = elf32_mb_hash_table (info); 2733 if (htab == NULL) 2734 return FALSE; 2735 2736 if (htab->elf.dynamic_sections_created 2737 && h->plt.refcount > 0) 2738 { 2739 /* Make sure this symbol is output as a dynamic symbol. 2740 Undefined weak syms won't yet be marked as dynamic. */ 2741 if (h->dynindx == -1 2742 && !h->forced_local) 2743 { 2744 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2745 return FALSE; 2746 } 2747 2748 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) 2749 { 2750 asection *s = htab->elf.splt; 2751 2752 /* The first entry in .plt is reserved. */ 2753 if (s->size == 0) 2754 s->size = PLT_ENTRY_SIZE; 2755 2756 h->plt.offset = s->size; 2757 2758 /* If this symbol is not defined in a regular file, and we are 2759 not generating a shared library, then set the symbol to this 2760 location in the .plt. This is required to make function 2761 pointers compare as equal between the normal executable and 2762 the shared library. */ 2763 if (! bfd_link_pic (info) 2764 && !h->def_regular) 2765 { 2766 h->root.u.def.section = s; 2767 h->root.u.def.value = h->plt.offset; 2768 } 2769 2770 /* Make room for this entry. */ 2771 s->size += PLT_ENTRY_SIZE; 2772 2773 /* We also need to make an entry in the .got.plt section, which 2774 will be placed in the .got section by the linker script. */ 2775 htab->elf.sgotplt->size += 4; 2776 2777 /* We also need to make an entry in the .rel.plt section. */ 2778 htab->elf.srelplt->size += sizeof (Elf32_External_Rela); 2779 } 2780 else 2781 { 2782 h->plt.offset = (bfd_vma) -1; 2783 h->needs_plt = 0; 2784 } 2785 } 2786 else 2787 { 2788 h->plt.offset = (bfd_vma) -1; 2789 h->needs_plt = 0; 2790 } 2791 2792 eh = (struct elf32_mb_link_hash_entry *) h; 2793 if (h->got.refcount > 0) 2794 { 2795 unsigned int need; 2796 asection *s; 2797 2798 /* Make sure this symbol is output as a dynamic symbol. 2799 Undefined weak syms won't yet be marked as dynamic. */ 2800 if (h->dynindx == -1 2801 && !h->forced_local) 2802 { 2803 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2804 return FALSE; 2805 } 2806 2807 need = 0; 2808 if ((eh->tls_mask & TLS_TLS) != 0) 2809 { 2810 /* Handle TLS Symbol */ 2811 if ((eh->tls_mask & TLS_LD) != 0) 2812 { 2813 if (!eh->elf.def_dynamic) 2814 /* We'll just use htab->tlsld_got.offset. This should 2815 always be the case. It's a little odd if we have 2816 a local dynamic reloc against a non-local symbol. */ 2817 htab->tlsld_got.refcount += 1; 2818 else 2819 need += 8; 2820 } 2821 if ((eh->tls_mask & TLS_GD) != 0) 2822 need += 8; 2823 } 2824 else 2825 { 2826 /* Regular (non-TLS) symbol */ 2827 need += 4; 2828 } 2829 if (need == 0) 2830 { 2831 h->got.offset = (bfd_vma) -1; 2832 } 2833 else 2834 { 2835 s = htab->elf.sgot; 2836 h->got.offset = s->size; 2837 s->size += need; 2838 htab->elf.srelgot->size += need * (sizeof (Elf32_External_Rela) / 4); 2839 } 2840 } 2841 else 2842 h->got.offset = (bfd_vma) -1; 2843 2844 if (h->dyn_relocs == NULL) 2845 return TRUE; 2846 2847 /* In the shared -Bsymbolic case, discard space allocated for 2848 dynamic pc-relative relocs against symbols which turn out to be 2849 defined in regular objects. For the normal shared case, discard 2850 space for pc-relative relocs that have become local due to symbol 2851 visibility changes. */ 2852 2853 if (bfd_link_pic (info)) 2854 { 2855 if (h->def_regular 2856 && (h->forced_local 2857 || info->symbolic)) 2858 { 2859 struct elf_dyn_relocs **pp; 2860 2861 for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) 2862 { 2863 p->count -= p->pc_count; 2864 p->pc_count = 0; 2865 if (p->count == 0) 2866 *pp = p->next; 2867 else 2868 pp = &p->next; 2869 } 2870 } 2871 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 2872 h->dyn_relocs = NULL; 2873 } 2874 else 2875 { 2876 /* For the non-shared case, discard space for relocs against 2877 symbols which turn out to need copy relocs or are not 2878 dynamic. */ 2879 2880 if (!h->non_got_ref 2881 && ((h->def_dynamic 2882 && !h->def_regular) 2883 || (htab->elf.dynamic_sections_created 2884 && (h->root.type == bfd_link_hash_undefweak 2885 || h->root.type == bfd_link_hash_undefined)))) 2886 { 2887 /* Make sure this symbol is output as a dynamic symbol. 2888 Undefined weak syms won't yet be marked as dynamic. */ 2889 if (h->dynindx == -1 2890 && !h->forced_local) 2891 { 2892 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2893 return FALSE; 2894 } 2895 2896 /* If that succeeded, we know we'll be keeping all the 2897 relocs. */ 2898 if (h->dynindx != -1) 2899 goto keep; 2900 } 2901 2902 h->dyn_relocs = NULL; 2903 2904 keep: ; 2905 } 2906 2907 /* Finally, allocate space. */ 2908 for (p = h->dyn_relocs; p != NULL; p = p->next) 2909 { 2910 asection *sreloc = elf_section_data (p->sec)->sreloc; 2911 sreloc->size += p->count * sizeof (Elf32_External_Rela); 2912 } 2913 2914 return TRUE; 2915 } 2916 2917 /* Set the sizes of the dynamic sections. */ 2918 2919 static bfd_boolean 2920 microblaze_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 2921 struct bfd_link_info *info) 2922 { 2923 struct elf32_mb_link_hash_table *htab; 2924 bfd *dynobj; 2925 asection *s; 2926 bfd *ibfd; 2927 2928 htab = elf32_mb_hash_table (info); 2929 if (htab == NULL) 2930 return FALSE; 2931 2932 dynobj = htab->elf.dynobj; 2933 BFD_ASSERT (dynobj != NULL); 2934 2935 /* Set up .got offsets for local syms, and space for local dynamic 2936 relocs. */ 2937 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 2938 { 2939 bfd_signed_vma *local_got; 2940 bfd_signed_vma *end_local_got; 2941 bfd_size_type locsymcount; 2942 Elf_Internal_Shdr *symtab_hdr; 2943 unsigned char *lgot_masks; 2944 asection *srel; 2945 2946 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 2947 continue; 2948 2949 for (s = ibfd->sections; s != NULL; s = s->next) 2950 { 2951 struct elf_dyn_relocs *p; 2952 2953 for (p = ((struct elf_dyn_relocs *) 2954 elf_section_data (s)->local_dynrel); 2955 p != NULL; 2956 p = p->next) 2957 { 2958 if (!bfd_is_abs_section (p->sec) 2959 && bfd_is_abs_section (p->sec->output_section)) 2960 { 2961 /* Input section has been discarded, either because 2962 it is a copy of a linkonce section or due to 2963 linker script /DISCARD/, so we'll be discarding 2964 the relocs too. */ 2965 } 2966 else if (p->count != 0) 2967 { 2968 srel = elf_section_data (p->sec)->sreloc; 2969 srel->size += p->count * sizeof (Elf32_External_Rela); 2970 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2971 info->flags |= DF_TEXTREL; 2972 } 2973 } 2974 } 2975 2976 local_got = elf_local_got_refcounts (ibfd); 2977 if (!local_got) 2978 continue; 2979 2980 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2981 locsymcount = symtab_hdr->sh_info; 2982 end_local_got = local_got + locsymcount; 2983 lgot_masks = (unsigned char *) end_local_got; 2984 s = htab->elf.sgot; 2985 srel = htab->elf.srelgot; 2986 2987 for (; local_got < end_local_got; ++local_got, ++lgot_masks) 2988 { 2989 if (*local_got > 0) 2990 { 2991 unsigned int need = 0; 2992 if ((*lgot_masks & TLS_TLS) != 0) 2993 { 2994 if ((*lgot_masks & TLS_GD) != 0) 2995 need += 8; 2996 if ((*lgot_masks & TLS_LD) != 0) 2997 htab->tlsld_got.refcount += 1; 2998 } 2999 else 3000 need += 4; 3001 3002 if (need == 0) 3003 { 3004 *local_got = (bfd_vma) -1; 3005 } 3006 else 3007 { 3008 *local_got = s->size; 3009 s->size += need; 3010 if (bfd_link_pic (info)) 3011 srel->size += need * (sizeof (Elf32_External_Rela) / 4); 3012 } 3013 } 3014 else 3015 *local_got = (bfd_vma) -1; 3016 } 3017 } 3018 3019 /* Allocate global sym .plt and .got entries, and space for global 3020 sym dynamic relocs. */ 3021 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); 3022 3023 if (htab->tlsld_got.refcount > 0) 3024 { 3025 htab->tlsld_got.offset = htab->elf.sgot->size; 3026 htab->elf.sgot->size += 8; 3027 if (bfd_link_pic (info)) 3028 htab->elf.srelgot->size += sizeof (Elf32_External_Rela); 3029 } 3030 else 3031 htab->tlsld_got.offset = (bfd_vma) -1; 3032 3033 if (elf_hash_table (info)->dynamic_sections_created) 3034 { 3035 /* Make space for the trailing nop in .plt. */ 3036 if (htab->elf.splt->size > 0) 3037 htab->elf.splt->size += 4; 3038 } 3039 3040 /* The check_relocs and adjust_dynamic_symbol entry points have 3041 determined the sizes of the various dynamic sections. Allocate 3042 memory for them. */ 3043 for (s = dynobj->sections; s != NULL; s = s->next) 3044 { 3045 const char *name; 3046 bfd_boolean strip = FALSE; 3047 3048 if ((s->flags & SEC_LINKER_CREATED) == 0) 3049 continue; 3050 3051 /* It's OK to base decisions on the section name, because none 3052 of the dynobj section names depend upon the input files. */ 3053 name = bfd_section_name (s); 3054 3055 if (strncmp (name, ".rela", 5) == 0) 3056 { 3057 if (s->size == 0) 3058 { 3059 /* If we don't need this section, strip it from the 3060 output file. This is to handle .rela.bss and 3061 .rela.plt. We must create it in 3062 create_dynamic_sections, because it must be created 3063 before the linker maps input sections to output 3064 sections. The linker does that before 3065 adjust_dynamic_symbol is called, and it is that 3066 function which decides whether anything needs to go 3067 into these sections. */ 3068 strip = TRUE; 3069 } 3070 else 3071 { 3072 /* We use the reloc_count field as a counter if we need 3073 to copy relocs into the output file. */ 3074 s->reloc_count = 0; 3075 } 3076 } 3077 else if (s != htab->elf.splt 3078 && s != htab->elf.sgot 3079 && s != htab->elf.sgotplt 3080 && s != htab->elf.sdynbss 3081 && s != htab->elf.sdynrelro) 3082 { 3083 /* It's not one of our sections, so don't allocate space. */ 3084 continue; 3085 } 3086 3087 if (strip) 3088 { 3089 s->flags |= SEC_EXCLUDE; 3090 continue; 3091 } 3092 3093 /* Allocate memory for the section contents. */ 3094 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. 3095 Unused entries should be reclaimed before the section's contents 3096 are written out, but at the moment this does not happen. Thus in 3097 order to prevent writing out garbage, we initialise the section's 3098 contents to zero. */ 3099 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 3100 if (s->contents == NULL && s->size != 0) 3101 return FALSE; 3102 } 3103 3104 /* ??? Force DF_BIND_NOW? */ 3105 info->flags |= DF_BIND_NOW; 3106 return _bfd_elf_add_dynamic_tags (output_bfd, info, TRUE); 3107 } 3108 3109 /* Finish up dynamic symbol handling. We set the contents of various 3110 dynamic sections here. */ 3111 3112 static bfd_boolean 3113 microblaze_elf_finish_dynamic_symbol (bfd *output_bfd, 3114 struct bfd_link_info *info, 3115 struct elf_link_hash_entry *h, 3116 Elf_Internal_Sym *sym) 3117 { 3118 struct elf32_mb_link_hash_table *htab; 3119 struct elf32_mb_link_hash_entry *eh = elf32_mb_hash_entry(h); 3120 3121 htab = elf32_mb_hash_table (info); 3122 if (htab == NULL) 3123 return FALSE; 3124 3125 if (h->plt.offset != (bfd_vma) -1) 3126 { 3127 asection *splt; 3128 asection *srela; 3129 asection *sgotplt; 3130 Elf_Internal_Rela rela; 3131 bfd_byte *loc; 3132 bfd_vma plt_index; 3133 bfd_vma got_offset; 3134 bfd_vma got_addr; 3135 3136 /* This symbol has an entry in the procedure linkage table. Set 3137 it up. */ 3138 BFD_ASSERT (h->dynindx != -1); 3139 3140 splt = htab->elf.splt; 3141 srela = htab->elf.srelplt; 3142 sgotplt = htab->elf.sgotplt; 3143 BFD_ASSERT (splt != NULL && srela != NULL && sgotplt != NULL); 3144 3145 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; /* first entry reserved. */ 3146 got_offset = (plt_index + 3) * 4; /* 3 reserved ??? */ 3147 got_addr = got_offset; 3148 3149 /* For non-PIC objects we need absolute address of the GOT entry. */ 3150 if (!bfd_link_pic (info)) 3151 got_addr += sgotplt->output_section->vma + sgotplt->output_offset; 3152 3153 /* Fill in the entry in the procedure linkage table. */ 3154 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_0 + ((got_addr >> 16) & 0xffff), 3155 splt->contents + h->plt.offset); 3156 if (bfd_link_pic (info)) 3157 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1 + (got_addr & 0xffff), 3158 splt->contents + h->plt.offset + 4); 3159 else 3160 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1_NOPIC + (got_addr & 0xffff), 3161 splt->contents + h->plt.offset + 4); 3162 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_2, 3163 splt->contents + h->plt.offset + 8); 3164 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_3, 3165 splt->contents + h->plt.offset + 12); 3166 3167 /* Any additions to the .got section??? */ 3168 /* bfd_put_32 (output_bfd, 3169 splt->output_section->vma + splt->output_offset + h->plt.offset + 4, 3170 sgotplt->contents + got_offset); */ 3171 3172 /* Fill in the entry in the .rela.plt section. */ 3173 rela.r_offset = (sgotplt->output_section->vma 3174 + sgotplt->output_offset 3175 + got_offset); 3176 rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_JUMP_SLOT); 3177 rela.r_addend = 0; 3178 loc = srela->contents; 3179 loc += plt_index * sizeof (Elf32_External_Rela); 3180 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3181 3182 if (!h->def_regular) 3183 { 3184 /* Mark the symbol as undefined, rather than as defined in 3185 the .plt section. Zero the value. */ 3186 sym->st_shndx = SHN_UNDEF; 3187 sym->st_value = 0; 3188 } 3189 } 3190 3191 /* h->got.refcount to be checked ? */ 3192 if (h->got.offset != (bfd_vma) -1 && 3193 ! ((h->got.offset & 1) || 3194 IS_TLS_LD(eh->tls_mask) || IS_TLS_GD(eh->tls_mask))) 3195 { 3196 asection *sgot; 3197 asection *srela; 3198 bfd_vma offset; 3199 3200 /* This symbol has an entry in the global offset table. Set it 3201 up. */ 3202 3203 sgot = htab->elf.sgot; 3204 srela = htab->elf.srelgot; 3205 BFD_ASSERT (sgot != NULL && srela != NULL); 3206 3207 offset = (sgot->output_section->vma + sgot->output_offset 3208 + (h->got.offset &~ (bfd_vma) 1)); 3209 3210 /* If this is a -Bsymbolic link, and the symbol is defined 3211 locally, we just want to emit a RELATIVE reloc. Likewise if 3212 the symbol was forced to be local because of a version file. 3213 The entry in the global offset table will already have been 3214 initialized in the relocate_section function. */ 3215 if (bfd_link_pic (info) 3216 && ((info->symbolic && h->def_regular) 3217 || h->dynindx == -1)) 3218 { 3219 asection *sec = h->root.u.def.section; 3220 bfd_vma value; 3221 3222 value = h->root.u.def.value; 3223 if (sec->output_section != NULL) 3224 /* PR 21180: If the output section is NULL, then the symbol is no 3225 longer needed, and in theory the GOT entry is redundant. But 3226 it is too late to change our minds now... */ 3227 value += sec->output_section->vma + sec->output_offset; 3228 3229 microblaze_elf_output_dynamic_relocation (output_bfd, 3230 srela, srela->reloc_count++, 3231 /* symindex= */ 0, 3232 R_MICROBLAZE_REL, offset, 3233 value); 3234 } 3235 else 3236 { 3237 microblaze_elf_output_dynamic_relocation (output_bfd, 3238 srela, srela->reloc_count++, 3239 h->dynindx, 3240 R_MICROBLAZE_GLOB_DAT, 3241 offset, 0); 3242 } 3243 3244 bfd_put_32 (output_bfd, (bfd_vma) 0, 3245 sgot->contents + (h->got.offset &~ (bfd_vma) 1)); 3246 } 3247 3248 if (h->needs_copy) 3249 { 3250 asection *s; 3251 Elf_Internal_Rela rela; 3252 bfd_byte *loc; 3253 3254 /* This symbols needs a copy reloc. Set it up. */ 3255 3256 BFD_ASSERT (h->dynindx != -1); 3257 3258 rela.r_offset = (h->root.u.def.value 3259 + h->root.u.def.section->output_section->vma 3260 + h->root.u.def.section->output_offset); 3261 rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_COPY); 3262 rela.r_addend = 0; 3263 if (h->root.u.def.section == htab->elf.sdynrelro) 3264 s = htab->elf.sreldynrelro; 3265 else 3266 s = htab->elf.srelbss; 3267 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 3268 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3269 } 3270 3271 /* Mark some specially defined symbols as absolute. */ 3272 if (h == htab->elf.hdynamic 3273 || h == htab->elf.hgot 3274 || h == htab->elf.hplt) 3275 sym->st_shndx = SHN_ABS; 3276 3277 return TRUE; 3278 } 3279 3280 3281 /* Finish up the dynamic sections. */ 3282 3283 static bfd_boolean 3284 microblaze_elf_finish_dynamic_sections (bfd *output_bfd, 3285 struct bfd_link_info *info) 3286 { 3287 bfd *dynobj; 3288 asection *sdyn, *sgot; 3289 struct elf32_mb_link_hash_table *htab; 3290 3291 htab = elf32_mb_hash_table (info); 3292 if (htab == NULL) 3293 return FALSE; 3294 3295 dynobj = htab->elf.dynobj; 3296 3297 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 3298 3299 if (htab->elf.dynamic_sections_created) 3300 { 3301 asection *splt; 3302 Elf32_External_Dyn *dyncon, *dynconend; 3303 3304 dyncon = (Elf32_External_Dyn *) sdyn->contents; 3305 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 3306 for (; dyncon < dynconend; dyncon++) 3307 { 3308 Elf_Internal_Dyn dyn; 3309 asection *s; 3310 bfd_boolean size; 3311 3312 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 3313 3314 switch (dyn.d_tag) 3315 { 3316 case DT_PLTGOT: 3317 s = htab->elf.sgotplt; 3318 size = FALSE; 3319 break; 3320 3321 case DT_PLTRELSZ: 3322 s = htab->elf.srelplt; 3323 size = TRUE; 3324 break; 3325 3326 case DT_JMPREL: 3327 s = htab->elf.srelplt; 3328 size = FALSE; 3329 break; 3330 3331 default: 3332 continue; 3333 } 3334 3335 if (s == NULL) 3336 dyn.d_un.d_val = 0; 3337 else 3338 { 3339 if (!size) 3340 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 3341 else 3342 dyn.d_un.d_val = s->size; 3343 } 3344 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3345 } 3346 3347 splt = htab->elf.splt; 3348 BFD_ASSERT (splt != NULL && sdyn != NULL); 3349 3350 /* Clear the first entry in the procedure linkage table, 3351 and put a nop in the last four bytes. */ 3352 if (splt->size > 0) 3353 { 3354 memset (splt->contents, 0, PLT_ENTRY_SIZE); 3355 bfd_put_32 (output_bfd, (bfd_vma) 0x80000000 /* nop. */, 3356 splt->contents + splt->size - 4); 3357 3358 if (splt->output_section != bfd_abs_section_ptr) 3359 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; 3360 } 3361 } 3362 3363 /* Set the first entry in the global offset table to the address of 3364 the dynamic section. */ 3365 sgot = htab->elf.sgotplt; 3366 if (sgot && sgot->size > 0) 3367 { 3368 if (sdyn == NULL) 3369 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 3370 else 3371 bfd_put_32 (output_bfd, 3372 sdyn->output_section->vma + sdyn->output_offset, 3373 sgot->contents); 3374 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 3375 } 3376 3377 if (htab->elf.sgot && htab->elf.sgot->size > 0) 3378 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4; 3379 3380 return TRUE; 3381 } 3382 3383 /* Hook called by the linker routine which adds symbols from an object 3384 file. We use it to put .comm items in .sbss, and not .bss. */ 3385 3386 static bfd_boolean 3387 microblaze_elf_add_symbol_hook (bfd *abfd, 3388 struct bfd_link_info *info, 3389 Elf_Internal_Sym *sym, 3390 const char **namep ATTRIBUTE_UNUSED, 3391 flagword *flagsp ATTRIBUTE_UNUSED, 3392 asection **secp, 3393 bfd_vma *valp) 3394 { 3395 if (sym->st_shndx == SHN_COMMON 3396 && !bfd_link_relocatable (info) 3397 && sym->st_size <= elf_gp_size (abfd)) 3398 { 3399 /* Common symbols less than or equal to -G nn bytes are automatically 3400 put into .sbss. */ 3401 *secp = bfd_make_section_old_way (abfd, ".sbss"); 3402 if (*secp == NULL 3403 || !bfd_set_section_flags (*secp, SEC_IS_COMMON | SEC_SMALL_DATA)) 3404 return FALSE; 3405 3406 *valp = sym->st_size; 3407 } 3408 3409 return TRUE; 3410 } 3411 3412 #define TARGET_LITTLE_SYM microblaze_elf32_le_vec 3413 #define TARGET_LITTLE_NAME "elf32-microblazeel" 3414 3415 #define TARGET_BIG_SYM microblaze_elf32_vec 3416 #define TARGET_BIG_NAME "elf32-microblaze" 3417 3418 #define ELF_ARCH bfd_arch_microblaze 3419 #define ELF_TARGET_ID MICROBLAZE_ELF_DATA 3420 #define ELF_MACHINE_CODE EM_MICROBLAZE 3421 #define ELF_MACHINE_ALT1 EM_MICROBLAZE_OLD 3422 #define ELF_MAXPAGESIZE 0x1000 3423 #define elf_info_to_howto microblaze_elf_info_to_howto 3424 #define elf_info_to_howto_rel NULL 3425 3426 #define bfd_elf32_bfd_reloc_type_lookup microblaze_elf_reloc_type_lookup 3427 #define bfd_elf32_bfd_is_local_label_name microblaze_elf_is_local_label_name 3428 #define elf_backend_relocate_section microblaze_elf_relocate_section 3429 #define bfd_elf32_bfd_relax_section microblaze_elf_relax_section 3430 #define bfd_elf32_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match 3431 #define bfd_elf32_bfd_reloc_name_lookup microblaze_elf_reloc_name_lookup 3432 3433 #define elf_backend_gc_mark_hook microblaze_elf_gc_mark_hook 3434 #define elf_backend_check_relocs microblaze_elf_check_relocs 3435 #define elf_backend_copy_indirect_symbol microblaze_elf_copy_indirect_symbol 3436 #define bfd_elf32_bfd_link_hash_table_create microblaze_elf_link_hash_table_create 3437 #define elf_backend_can_gc_sections 1 3438 #define elf_backend_can_refcount 1 3439 #define elf_backend_want_got_plt 1 3440 #define elf_backend_plt_readonly 1 3441 #define elf_backend_got_header_size 12 3442 #define elf_backend_want_dynrelro 1 3443 #define elf_backend_rela_normal 1 3444 #define elf_backend_dtrel_excludes_plt 1 3445 3446 #define elf_backend_adjust_dynamic_symbol microblaze_elf_adjust_dynamic_symbol 3447 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections 3448 #define elf_backend_finish_dynamic_sections microblaze_elf_finish_dynamic_sections 3449 #define elf_backend_finish_dynamic_symbol microblaze_elf_finish_dynamic_symbol 3450 #define elf_backend_size_dynamic_sections microblaze_elf_size_dynamic_sections 3451 #define elf_backend_add_symbol_hook microblaze_elf_add_symbol_hook 3452 3453 #include "elf32-target.h" 3454