1 /* Xilinx MicroBlaze-specific support for 32-bit ELF 2 3 Copyright 2009, 2010, 2011, 2012 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 2, /* Size (0 = byte, 1 = short, 2 = long). */ 48 32, /* Bitsize. */ 49 FALSE, /* PC_relative. */ 50 0, /* Bitpos. */ 51 complain_overflow_bitfield, /* 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 2, /* Size (0 = byte, 1 = short, 2 = long). */ 183 32, /* Bitsize. */ 184 TRUE, /* PC_relative. */ 185 0, /* Bitpos. */ 186 complain_overflow_bitfield, /* 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 GOT relocation. Table-entry not really used. */ 255 HOWTO (R_MICROBLAZE_GOT_64, /* Type. */ 256 0, /* Rightshift. */ 257 2, /* Size (0 = byte, 1 = short, 2 = long). */ 258 16, /* Bitsize. */ 259 FALSE, /* PC_relative. */ 260 0, /* Bitpos. */ 261 complain_overflow_dont, /* Complain on overflow. */ 262 bfd_elf_generic_reloc,/* Special Function. */ 263 "R_MICROBLAZE_GOT_64",/* Name. */ 264 FALSE, /* Partial Inplace. */ 265 0, /* Source Mask. */ 266 0x0000ffff, /* Dest Mask. */ 267 FALSE), /* PC relative offset? */ 268 269 /* A 64 bit PLT relocation. Table-entry not really used. */ 270 HOWTO (R_MICROBLAZE_PLT_64, /* Type. */ 271 0, /* Rightshift. */ 272 2, /* Size (0 = byte, 1 = short, 2 = long). */ 273 16, /* Bitsize. */ 274 TRUE, /* PC_relative. */ 275 0, /* Bitpos. */ 276 complain_overflow_dont, /* Complain on overflow. */ 277 bfd_elf_generic_reloc,/* Special Function. */ 278 "R_MICROBLAZE_PLT_64",/* Name. */ 279 FALSE, /* Partial Inplace. */ 280 0, /* Source Mask. */ 281 0x0000ffff, /* Dest Mask. */ 282 TRUE), /* PC relative offset? */ 283 284 /* Table-entry not really used. */ 285 HOWTO (R_MICROBLAZE_REL, /* Type. */ 286 0, /* Rightshift. */ 287 2, /* Size (0 = byte, 1 = short, 2 = long). */ 288 16, /* Bitsize. */ 289 TRUE, /* PC_relative. */ 290 0, /* Bitpos. */ 291 complain_overflow_dont, /* Complain on overflow. */ 292 bfd_elf_generic_reloc,/* Special Function. */ 293 "R_MICROBLAZE_REL", /* Name. */ 294 FALSE, /* Partial Inplace. */ 295 0, /* Source Mask. */ 296 0x0000ffff, /* Dest Mask. */ 297 TRUE), /* PC relative offset? */ 298 299 /* Table-entry not really used. */ 300 HOWTO (R_MICROBLAZE_JUMP_SLOT,/* 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_JUMP_SLOT", /* 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_GLOB_DAT,/* 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_GLOB_DAT", /* Name. */ 324 FALSE, /* Partial Inplace. */ 325 0, /* Source Mask. */ 326 0x0000ffff, /* Dest Mask. */ 327 TRUE), /* PC relative offset? */ 328 329 /* A 64 bit GOT relative relocation. Table-entry not really used. */ 330 HOWTO (R_MICROBLAZE_GOTOFF_64, /* Type. */ 331 0, /* Rightshift. */ 332 2, /* Size (0 = byte, 1 = short, 2 = long). */ 333 16, /* Bitsize. */ 334 FALSE, /* PC_relative. */ 335 0, /* Bitpos. */ 336 complain_overflow_dont, /* Complain on overflow. */ 337 bfd_elf_generic_reloc,/* Special Function. */ 338 "R_MICROBLAZE_GOTOFF_64", /* Name. */ 339 FALSE, /* Partial Inplace. */ 340 0, /* Source Mask. */ 341 0x0000ffff, /* Dest Mask. */ 342 FALSE), /* PC relative offset? */ 343 344 /* A 32 bit GOT relative relocation. Table-entry not really used. */ 345 HOWTO (R_MICROBLAZE_GOTOFF_32, /* Type. */ 346 0, /* Rightshift. */ 347 2, /* Size (0 = byte, 1 = short, 2 = long). */ 348 16, /* Bitsize. */ 349 FALSE, /* PC_relative. */ 350 0, /* Bitpos. */ 351 complain_overflow_dont, /* Complain on overflow. */ 352 bfd_elf_generic_reloc, /* Special Function. */ 353 "R_MICROBLAZE_GOTOFF_32", /* Name. */ 354 FALSE, /* Partial Inplace. */ 355 0, /* Source Mask. */ 356 0x0000ffff, /* Dest Mask. */ 357 FALSE), /* PC relative offset? */ 358 359 /* COPY relocation. Table-entry not really used. */ 360 HOWTO (R_MICROBLAZE_COPY, /* 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_COPY", /* Name. */ 369 FALSE, /* Partial Inplace. */ 370 0, /* Source Mask. */ 371 0x0000ffff, /* Dest Mask. */ 372 FALSE), /* PC relative offset? */ 373 374 /* Marker relocs for TLS. */ 375 HOWTO (R_MICROBLAZE_TLS, 376 0, /* rightshift */ 377 2, /* size (0 = byte, 1 = short, 2 = long) */ 378 32, /* 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_TLS", /* name */ 384 FALSE, /* partial_inplace */ 385 0, /* src_mask */ 386 0x0000ffff, /* dst_mask */ 387 FALSE), /* pcrel_offset */ 388 389 HOWTO (R_MICROBLAZE_TLSGD, 390 0, /* rightshift */ 391 2, /* size (0 = byte, 1 = short, 2 = long) */ 392 32, /* bitsize */ 393 FALSE, /* pc_relative */ 394 0, /* bitpos */ 395 complain_overflow_dont, /* complain_on_overflow */ 396 bfd_elf_generic_reloc, /* special_function */ 397 "R_MICROBLAZE_TLSGD", /* name */ 398 FALSE, /* partial_inplace */ 399 0, /* src_mask */ 400 0x0000ffff, /* dst_mask */ 401 FALSE), /* pcrel_offset */ 402 403 HOWTO (R_MICROBLAZE_TLSLD, 404 0, /* rightshift */ 405 2, /* size (0 = byte, 1 = short, 2 = long) */ 406 32, /* bitsize */ 407 FALSE, /* pc_relative */ 408 0, /* bitpos */ 409 complain_overflow_dont, /* complain_on_overflow */ 410 bfd_elf_generic_reloc, /* special_function */ 411 "R_MICROBLAZE_TLSLD", /* name */ 412 FALSE, /* partial_inplace */ 413 0, /* src_mask */ 414 0x0000ffff, /* dst_mask */ 415 FALSE), /* pcrel_offset */ 416 417 /* Computes the load module index of the load module that contains the 418 definition of its TLS sym. */ 419 HOWTO (R_MICROBLAZE_TLSDTPMOD32, 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_TLSDTPMOD32", /* name */ 428 FALSE, /* partial_inplace */ 429 0, /* src_mask */ 430 0x0000ffff, /* dst_mask */ 431 FALSE), /* pcrel_offset */ 432 433 /* Computes a dtv-relative displacement, the difference between the value 434 of sym+add and the base address of the thread-local storage block that 435 contains the definition of sym, minus 0x8000. Used for initializing GOT */ 436 HOWTO (R_MICROBLAZE_TLSDTPREL32, 437 0, /* rightshift */ 438 2, /* size (0 = byte, 1 = short, 2 = long) */ 439 32, /* bitsize */ 440 FALSE, /* pc_relative */ 441 0, /* bitpos */ 442 complain_overflow_dont, /* complain_on_overflow */ 443 bfd_elf_generic_reloc, /* special_function */ 444 "R_MICROBLAZE_TLSDTPREL32", /* name */ 445 FALSE, /* partial_inplace */ 446 0, /* src_mask */ 447 0x0000ffff, /* dst_mask */ 448 FALSE), /* pcrel_offset */ 449 450 /* Computes a dtv-relative displacement, the difference between the value 451 of sym+add and the base address of the thread-local storage block that 452 contains the definition of sym, minus 0x8000. */ 453 HOWTO (R_MICROBLAZE_TLSDTPREL64, 454 0, /* rightshift */ 455 2, /* size (0 = byte, 1 = short, 2 = long) */ 456 32, /* bitsize */ 457 FALSE, /* pc_relative */ 458 0, /* bitpos */ 459 complain_overflow_dont, /* complain_on_overflow */ 460 bfd_elf_generic_reloc, /* special_function */ 461 "R_MICROBLAZE_TLSDTPREL64", /* name */ 462 FALSE, /* partial_inplace */ 463 0, /* src_mask */ 464 0x0000ffff, /* dst_mask */ 465 FALSE), /* pcrel_offset */ 466 467 /* Computes a tp-relative displacement, the difference between the value of 468 sym+add and the value of the thread pointer (r13). */ 469 HOWTO (R_MICROBLAZE_TLSGOTTPREL32, 470 0, /* rightshift */ 471 2, /* size (0 = byte, 1 = short, 2 = long) */ 472 32, /* bitsize */ 473 FALSE, /* pc_relative */ 474 0, /* bitpos */ 475 complain_overflow_dont, /* complain_on_overflow */ 476 bfd_elf_generic_reloc, /* special_function */ 477 "R_MICROBLAZE_TLSGOTTPREL32", /* name */ 478 FALSE, /* partial_inplace */ 479 0, /* src_mask */ 480 0x0000ffff, /* dst_mask */ 481 FALSE), /* pcrel_offset */ 482 483 /* Computes a tp-relative displacement, the difference between the value of 484 sym+add and the value of the thread pointer (r13). */ 485 HOWTO (R_MICROBLAZE_TLSTPREL32, 486 0, /* rightshift */ 487 2, /* size (0 = byte, 1 = short, 2 = long) */ 488 32, /* bitsize */ 489 FALSE, /* pc_relative */ 490 0, /* bitpos */ 491 complain_overflow_dont, /* complain_on_overflow */ 492 bfd_elf_generic_reloc, /* special_function */ 493 "R_MICROBLAZE_TLSTPREL32", /* name */ 494 FALSE, /* partial_inplace */ 495 0, /* src_mask */ 496 0x0000ffff, /* dst_mask */ 497 FALSE), /* pcrel_offset */ 498 499 }; 500 501 #ifndef NUM_ELEM 502 #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0]) 503 #endif 504 505 /* Initialize the microblaze_elf_howto_table, so that linear accesses can be done. */ 506 507 static void 508 microblaze_elf_howto_init (void) 509 { 510 unsigned int i; 511 512 for (i = NUM_ELEM (microblaze_elf_howto_raw); i--;) 513 { 514 unsigned int type; 515 516 type = microblaze_elf_howto_raw[i].type; 517 518 BFD_ASSERT (type < NUM_ELEM (microblaze_elf_howto_table)); 519 520 microblaze_elf_howto_table [type] = & microblaze_elf_howto_raw [i]; 521 } 522 } 523 524 static reloc_howto_type * 525 microblaze_elf_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, 526 bfd_reloc_code_real_type code) 527 { 528 enum elf_microblaze_reloc_type microblaze_reloc = R_MICROBLAZE_NONE; 529 530 switch (code) 531 { 532 case BFD_RELOC_NONE: 533 microblaze_reloc = R_MICROBLAZE_NONE; 534 break; 535 case BFD_RELOC_MICROBLAZE_64_NONE: 536 microblaze_reloc = R_MICROBLAZE_64_NONE; 537 break; 538 case BFD_RELOC_32: 539 microblaze_reloc = R_MICROBLAZE_32; 540 break; 541 /* RVA is treated the same as 32 */ 542 case BFD_RELOC_RVA: 543 microblaze_reloc = R_MICROBLAZE_32; 544 break; 545 case BFD_RELOC_32_PCREL: 546 microblaze_reloc = R_MICROBLAZE_32_PCREL; 547 break; 548 case BFD_RELOC_64_PCREL: 549 microblaze_reloc = R_MICROBLAZE_64_PCREL; 550 break; 551 case BFD_RELOC_MICROBLAZE_32_LO_PCREL: 552 microblaze_reloc = R_MICROBLAZE_32_PCREL_LO; 553 break; 554 case BFD_RELOC_64: 555 microblaze_reloc = R_MICROBLAZE_64; 556 break; 557 case BFD_RELOC_MICROBLAZE_32_LO: 558 microblaze_reloc = R_MICROBLAZE_32_LO; 559 break; 560 case BFD_RELOC_MICROBLAZE_32_ROSDA: 561 microblaze_reloc = R_MICROBLAZE_SRO32; 562 break; 563 case BFD_RELOC_MICROBLAZE_32_RWSDA: 564 microblaze_reloc = R_MICROBLAZE_SRW32; 565 break; 566 case BFD_RELOC_MICROBLAZE_32_SYM_OP_SYM: 567 microblaze_reloc = R_MICROBLAZE_32_SYM_OP_SYM; 568 break; 569 case BFD_RELOC_VTABLE_INHERIT: 570 microblaze_reloc = R_MICROBLAZE_GNU_VTINHERIT; 571 break; 572 case BFD_RELOC_VTABLE_ENTRY: 573 microblaze_reloc = R_MICROBLAZE_GNU_VTENTRY; 574 break; 575 case BFD_RELOC_MICROBLAZE_64_GOTPC: 576 microblaze_reloc = R_MICROBLAZE_GOTPC_64; 577 break; 578 case BFD_RELOC_MICROBLAZE_64_GOT: 579 microblaze_reloc = R_MICROBLAZE_GOT_64; 580 break; 581 case BFD_RELOC_MICROBLAZE_64_PLT: 582 microblaze_reloc = R_MICROBLAZE_PLT_64; 583 break; 584 case BFD_RELOC_MICROBLAZE_64_GOTOFF: 585 microblaze_reloc = R_MICROBLAZE_GOTOFF_64; 586 break; 587 case BFD_RELOC_MICROBLAZE_32_GOTOFF: 588 microblaze_reloc = R_MICROBLAZE_GOTOFF_32; 589 break; 590 case BFD_RELOC_MICROBLAZE_64_TLSGD: 591 microblaze_reloc = R_MICROBLAZE_TLSGD; 592 break; 593 case BFD_RELOC_MICROBLAZE_64_TLSLD: 594 microblaze_reloc = R_MICROBLAZE_TLSLD; 595 break; 596 case BFD_RELOC_MICROBLAZE_32_TLSDTPREL: 597 microblaze_reloc = R_MICROBLAZE_TLSDTPREL32; 598 break; 599 case BFD_RELOC_MICROBLAZE_64_TLSDTPREL: 600 microblaze_reloc = R_MICROBLAZE_TLSDTPREL64; 601 break; 602 case BFD_RELOC_MICROBLAZE_32_TLSDTPMOD: 603 microblaze_reloc = R_MICROBLAZE_TLSDTPMOD32; 604 break; 605 case BFD_RELOC_MICROBLAZE_64_TLSGOTTPREL: 606 microblaze_reloc = R_MICROBLAZE_TLSGOTTPREL32; 607 break; 608 case BFD_RELOC_MICROBLAZE_64_TLSTPREL: 609 microblaze_reloc = R_MICROBLAZE_TLSTPREL32; 610 break; 611 case BFD_RELOC_MICROBLAZE_COPY: 612 microblaze_reloc = R_MICROBLAZE_COPY; 613 break; 614 default: 615 return (reloc_howto_type *) NULL; 616 } 617 618 if (!microblaze_elf_howto_table [R_MICROBLAZE_32]) 619 /* Initialize howto table if needed. */ 620 microblaze_elf_howto_init (); 621 622 return microblaze_elf_howto_table [(int) microblaze_reloc]; 623 }; 624 625 static reloc_howto_type * 626 microblaze_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 627 const char *r_name) 628 { 629 unsigned int i; 630 631 for (i = 0; i < NUM_ELEM (microblaze_elf_howto_raw); i++) 632 if (microblaze_elf_howto_raw[i].name != NULL 633 && strcasecmp (microblaze_elf_howto_raw[i].name, r_name) == 0) 634 return µblaze_elf_howto_raw[i]; 635 636 return NULL; 637 } 638 639 /* Set the howto pointer for a RCE ELF reloc. */ 640 641 static void 642 microblaze_elf_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, 643 arelent * cache_ptr, 644 Elf_Internal_Rela * dst) 645 { 646 if (!microblaze_elf_howto_table [R_MICROBLAZE_32]) 647 /* Initialize howto table if needed. */ 648 microblaze_elf_howto_init (); 649 650 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_MICROBLAZE_max); 651 652 cache_ptr->howto = microblaze_elf_howto_table [ELF32_R_TYPE (dst->r_info)]; 653 } 654 655 /* Microblaze ELF local labels start with 'L.' or '$L', not '.L'. */ 656 657 static bfd_boolean 658 microblaze_elf_is_local_label_name (bfd *abfd, const char *name) 659 { 660 if (name[0] == 'L' && name[1] == '.') 661 return TRUE; 662 663 if (name[0] == '$' && name[1] == 'L') 664 return TRUE; 665 666 /* With gcc, the labels go back to starting with '.', so we accept 667 the generic ELF local label syntax as well. */ 668 return _bfd_elf_is_local_label_name (abfd, name); 669 } 670 671 /* The microblaze linker (like many others) needs to keep track of 672 the number of relocs that it decides to copy as dynamic relocs in 673 check_relocs for each symbol. This is so that it can later discard 674 them if they are found to be unnecessary. We store the information 675 in a field extending the regular ELF linker hash table. */ 676 677 struct elf32_mb_dyn_relocs 678 { 679 struct elf32_mb_dyn_relocs *next; 680 681 /* The input section of the reloc. */ 682 asection *sec; 683 684 /* Total number of relocs copied for the input section. */ 685 bfd_size_type count; 686 687 /* Number of pc-relative relocs copied for the input section. */ 688 bfd_size_type pc_count; 689 }; 690 691 /* ELF linker hash entry. */ 692 693 struct elf32_mb_link_hash_entry 694 { 695 struct elf_link_hash_entry elf; 696 697 /* Track dynamic relocs copied for this symbol. */ 698 struct elf32_mb_dyn_relocs *dyn_relocs; 699 700 /* TLS Reference Types for the symbol; Updated by check_relocs */ 701 #define TLS_GD 1 /* GD reloc. */ 702 #define TLS_LD 2 /* LD reloc. */ 703 #define TLS_TPREL 4 /* TPREL reloc, => IE. */ 704 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ 705 #define TLS_TLS 16 /* Any TLS reloc. */ 706 unsigned char tls_mask; 707 708 }; 709 710 #define IS_TLS_GD(x) (x == (TLS_TLS | TLS_GD)) 711 #define IS_TLS_LD(x) (x == (TLS_TLS | TLS_LD)) 712 #define IS_TLS_DTPREL(x) (x == (TLS_TLS | TLS_DTPREL)) 713 #define IS_TLS_NONE(x) (x == 0) 714 715 #define elf32_mb_hash_entry(ent) ((struct elf32_mb_link_hash_entry *)(ent)) 716 717 /* ELF linker hash table. */ 718 719 struct elf32_mb_link_hash_table 720 { 721 struct elf_link_hash_table elf; 722 723 /* Short-cuts to get to dynamic linker sections. */ 724 asection *sgot; 725 asection *sgotplt; 726 asection *srelgot; 727 asection *splt; 728 asection *srelplt; 729 asection *sdynbss; 730 asection *srelbss; 731 732 /* Small local sym to section mapping cache. */ 733 struct sym_cache sym_sec; 734 735 /* TLS Local Dynamic GOT Entry */ 736 union { 737 bfd_signed_vma refcount; 738 bfd_vma offset; 739 } tlsld_got; 740 }; 741 742 /* Nonzero if this section has TLS related relocations. */ 743 #define has_tls_reloc sec_flg0 744 745 /* Get the ELF linker hash table from a link_info structure. */ 746 747 #define elf32_mb_hash_table(p) \ 748 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 749 == MICROBLAZE_ELF_DATA ? ((struct elf32_mb_link_hash_table *) ((p)->hash)) : NULL) 750 751 /* Create an entry in a microblaze ELF linker hash table. */ 752 753 static struct bfd_hash_entry * 754 link_hash_newfunc (struct bfd_hash_entry *entry, 755 struct bfd_hash_table *table, 756 const char *string) 757 { 758 /* Allocate the structure if it has not already been allocated by a 759 subclass. */ 760 if (entry == NULL) 761 { 762 entry = bfd_hash_allocate (table, 763 sizeof (struct elf32_mb_link_hash_entry)); 764 if (entry == NULL) 765 return entry; 766 } 767 768 /* Call the allocation method of the superclass. */ 769 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 770 if (entry != NULL) 771 { 772 struct elf32_mb_link_hash_entry *eh; 773 774 eh = (struct elf32_mb_link_hash_entry *) entry; 775 eh->dyn_relocs = NULL; 776 eh->tls_mask = 0; 777 } 778 779 return entry; 780 } 781 782 /* Create a mb ELF linker hash table. */ 783 784 static struct bfd_link_hash_table * 785 microblaze_elf_link_hash_table_create (bfd *abfd) 786 { 787 struct elf32_mb_link_hash_table *ret; 788 bfd_size_type amt = sizeof (struct elf32_mb_link_hash_table); 789 790 ret = (struct elf32_mb_link_hash_table *) bfd_zmalloc (amt); 791 if (ret == NULL) 792 return NULL; 793 794 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, 795 sizeof (struct elf32_mb_link_hash_entry), 796 MICROBLAZE_ELF_DATA)) 797 { 798 free (ret); 799 return NULL; 800 } 801 802 return &ret->elf.root; 803 } 804 805 /* Set the values of the small data pointers. */ 806 807 static void 808 microblaze_elf_final_sdp (struct bfd_link_info *info) 809 { 810 struct bfd_link_hash_entry *h; 811 812 h = bfd_link_hash_lookup (info->hash, RO_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE); 813 if (h != (struct bfd_link_hash_entry *) NULL 814 && h->type == bfd_link_hash_defined) 815 ro_small_data_pointer = (h->u.def.value 816 + h->u.def.section->output_section->vma 817 + h->u.def.section->output_offset); 818 819 h = bfd_link_hash_lookup (info->hash, RW_SDA_ANCHOR_NAME, FALSE, FALSE, TRUE); 820 if (h != (struct bfd_link_hash_entry *) NULL 821 && h->type == bfd_link_hash_defined) 822 rw_small_data_pointer = (h->u.def.value 823 + h->u.def.section->output_section->vma 824 + h->u.def.section->output_offset); 825 } 826 827 static bfd_vma 828 dtprel_base (struct bfd_link_info *info) 829 { 830 /* If tls_sec is NULL, we should have signalled an error already. */ 831 if (elf_hash_table (info)->tls_sec == NULL) 832 return 0; 833 return elf_hash_table (info)->tls_sec->vma; 834 } 835 836 /* The size of the thread control block. */ 837 #define TCB_SIZE 8 838 839 /* Output a simple dynamic relocation into SRELOC. */ 840 841 static void 842 microblaze_elf_output_dynamic_relocation (bfd *output_bfd, 843 asection *sreloc, 844 unsigned long reloc_index, 845 unsigned long indx, 846 int r_type, 847 bfd_vma offset, 848 bfd_vma addend) 849 { 850 851 Elf_Internal_Rela rel; 852 853 rel.r_info = ELF32_R_INFO (indx, r_type); 854 rel.r_offset = offset; 855 rel.r_addend = addend; 856 857 bfd_elf32_swap_reloca_out (output_bfd, &rel, 858 (sreloc->contents + reloc_index * sizeof (Elf32_External_Rela))); 859 } 860 861 /* This code is taken from elf32-m32r.c 862 There is some attempt to make this function usable for many architectures, 863 both USE_REL and USE_RELA ['twould be nice if such a critter existed], 864 if only to serve as a learning tool. 865 866 The RELOCATE_SECTION function is called by the new ELF backend linker 867 to handle the relocations for a section. 868 869 The relocs are always passed as Rela structures; if the section 870 actually uses Rel structures, the r_addend field will always be 871 zero. 872 873 This function is responsible for adjust the section contents as 874 necessary, and (if using Rela relocs and generating a 875 relocatable output file) adjusting the reloc addend as 876 necessary. 877 878 This function does not have to worry about setting the reloc 879 address or the reloc symbol index. 880 881 LOCAL_SYMS is a pointer to the swapped in local symbols. 882 883 LOCAL_SECTIONS is an array giving the section in the input file 884 corresponding to the st_shndx field of each local symbol. 885 886 The global hash table entry for the global symbols can be found 887 via elf_sym_hashes (input_bfd). 888 889 When generating relocatable output, this function must handle 890 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 891 going to be the section symbol corresponding to the output 892 section, which means that the addend must be adjusted 893 accordingly. */ 894 895 static bfd_boolean 896 microblaze_elf_relocate_section (bfd *output_bfd, 897 struct bfd_link_info *info, 898 bfd *input_bfd, 899 asection *input_section, 900 bfd_byte *contents, 901 Elf_Internal_Rela *relocs, 902 Elf_Internal_Sym *local_syms, 903 asection **local_sections) 904 { 905 struct elf32_mb_link_hash_table *htab; 906 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 907 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); 908 Elf_Internal_Rela *rel, *relend; 909 int endian = (bfd_little_endian (output_bfd)) ? 0 : 2; 910 /* Assume success. */ 911 bfd_boolean ret = TRUE; 912 asection *sreloc; 913 bfd_vma *local_got_offsets; 914 unsigned int tls_type; 915 916 if (!microblaze_elf_howto_table[R_MICROBLAZE_max-1]) 917 microblaze_elf_howto_init (); 918 919 htab = elf32_mb_hash_table (info); 920 if (htab == NULL) 921 return FALSE; 922 923 local_got_offsets = elf_local_got_offsets (input_bfd); 924 925 sreloc = elf_section_data (input_section)->sreloc; 926 927 rel = relocs; 928 relend = relocs + input_section->reloc_count; 929 for (; rel < relend; rel++) 930 { 931 int r_type; 932 reloc_howto_type *howto; 933 unsigned long r_symndx; 934 bfd_vma addend = rel->r_addend; 935 bfd_vma offset = rel->r_offset; 936 struct elf_link_hash_entry *h; 937 Elf_Internal_Sym *sym; 938 asection *sec; 939 const char *sym_name; 940 bfd_reloc_status_type r = bfd_reloc_ok; 941 const char *errmsg = NULL; 942 bfd_boolean unresolved_reloc = FALSE; 943 944 h = NULL; 945 r_type = ELF32_R_TYPE (rel->r_info); 946 tls_type = 0; 947 948 if (r_type < 0 || r_type >= (int) R_MICROBLAZE_max) 949 { 950 (*_bfd_error_handler) (_("%s: unknown relocation type %d"), 951 bfd_get_filename (input_bfd), (int) r_type); 952 bfd_set_error (bfd_error_bad_value); 953 ret = FALSE; 954 continue; 955 } 956 957 howto = microblaze_elf_howto_table[r_type]; 958 r_symndx = ELF32_R_SYM (rel->r_info); 959 960 if (info->relocatable) 961 { 962 /* This is a relocatable link. We don't have to change 963 anything, unless the reloc is against a section symbol, 964 in which case we have to adjust according to where the 965 section symbol winds up in the output section. */ 966 sec = NULL; 967 if (r_symndx >= symtab_hdr->sh_info) 968 /* External symbol. */ 969 continue; 970 971 /* Local symbol. */ 972 sym = local_syms + r_symndx; 973 sym_name = "<local symbol>"; 974 /* STT_SECTION: symbol is associated with a section. */ 975 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) 976 /* Symbol isn't associated with a section. Nothing to do. */ 977 continue; 978 979 sec = local_sections[r_symndx]; 980 addend += sec->output_offset + sym->st_value; 981 #ifndef USE_REL 982 /* This can't be done for USE_REL because it doesn't mean anything 983 and elf_link_input_bfd asserts this stays zero. */ 984 /* rel->r_addend = addend; */ 985 #endif 986 987 #ifndef USE_REL 988 /* Addends are stored with relocs. We're done. */ 989 continue; 990 #else /* USE_REL */ 991 /* If partial_inplace, we need to store any additional addend 992 back in the section. */ 993 if (!howto->partial_inplace) 994 continue; 995 /* ??? Here is a nice place to call a special_function like handler. */ 996 r = _bfd_relocate_contents (howto, input_bfd, addend, 997 contents + offset); 998 #endif /* USE_REL */ 999 } 1000 else 1001 { 1002 bfd_vma relocation; 1003 1004 /* This is a final link. */ 1005 sym = NULL; 1006 sec = NULL; 1007 unresolved_reloc = FALSE; 1008 1009 if (r_symndx < symtab_hdr->sh_info) 1010 { 1011 /* Local symbol. */ 1012 sym = local_syms + r_symndx; 1013 sec = local_sections[r_symndx]; 1014 if (sec == 0) 1015 continue; 1016 sym_name = "<local symbol>"; 1017 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 1018 /* r_addend may have changed if the reference section was 1019 a merge section. */ 1020 addend = rel->r_addend; 1021 } 1022 else 1023 { 1024 /* External symbol. */ 1025 bfd_boolean warned ATTRIBUTE_UNUSED; 1026 bfd_boolean ignored ATTRIBUTE_UNUSED; 1027 1028 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 1029 r_symndx, symtab_hdr, sym_hashes, 1030 h, sec, relocation, 1031 unresolved_reloc, warned, ignored); 1032 sym_name = h->root.root.string; 1033 } 1034 1035 /* Sanity check the address. */ 1036 if (offset > bfd_get_section_limit (input_bfd, input_section)) 1037 { 1038 r = bfd_reloc_outofrange; 1039 goto check_reloc; 1040 } 1041 1042 switch ((int) r_type) 1043 { 1044 case (int) R_MICROBLAZE_SRO32 : 1045 { 1046 const char *name; 1047 1048 /* Only relocate if the symbol is defined. */ 1049 if (sec) 1050 { 1051 name = bfd_get_section_name (sec->owner, sec); 1052 1053 if (strcmp (name, ".sdata2") == 0 1054 || strcmp (name, ".sbss2") == 0) 1055 { 1056 if (ro_small_data_pointer == 0) 1057 microblaze_elf_final_sdp (info); 1058 if (ro_small_data_pointer == 0) 1059 { 1060 ret = FALSE; 1061 r = bfd_reloc_undefined; 1062 goto check_reloc; 1063 } 1064 1065 /* At this point `relocation' contains the object's 1066 address. */ 1067 relocation -= ro_small_data_pointer; 1068 /* Now it contains the offset from _SDA2_BASE_. */ 1069 r = _bfd_final_link_relocate (howto, input_bfd, 1070 input_section, 1071 contents, offset, 1072 relocation, addend); 1073 } 1074 else 1075 { 1076 (*_bfd_error_handler) (_("%s: The target (%s) of an %s relocation is in the wrong section (%s)"), 1077 bfd_get_filename (input_bfd), 1078 sym_name, 1079 microblaze_elf_howto_table[(int) r_type]->name, 1080 bfd_get_section_name (sec->owner, sec)); 1081 /*bfd_set_error (bfd_error_bad_value); ??? why? */ 1082 ret = FALSE; 1083 continue; 1084 } 1085 } 1086 } 1087 break; 1088 1089 case (int) R_MICROBLAZE_SRW32 : 1090 { 1091 const char *name; 1092 1093 /* Only relocate if the symbol is defined. */ 1094 if (sec) 1095 { 1096 name = bfd_get_section_name (sec->owner, sec); 1097 1098 if (strcmp (name, ".sdata") == 0 1099 || strcmp (name, ".sbss") == 0) 1100 { 1101 if (rw_small_data_pointer == 0) 1102 microblaze_elf_final_sdp (info); 1103 if (rw_small_data_pointer == 0) 1104 { 1105 ret = FALSE; 1106 r = bfd_reloc_undefined; 1107 goto check_reloc; 1108 } 1109 1110 /* At this point `relocation' contains the object's 1111 address. */ 1112 relocation -= rw_small_data_pointer; 1113 /* Now it contains the offset from _SDA_BASE_. */ 1114 r = _bfd_final_link_relocate (howto, input_bfd, 1115 input_section, 1116 contents, offset, 1117 relocation, addend); 1118 } 1119 else 1120 { 1121 (*_bfd_error_handler) (_("%s: The target (%s) of an %s relocation is in the wrong section (%s)"), 1122 bfd_get_filename (input_bfd), 1123 sym_name, 1124 microblaze_elf_howto_table[(int) r_type]->name, 1125 bfd_get_section_name (sec->owner, sec)); 1126 /*bfd_set_error (bfd_error_bad_value); ??? why? */ 1127 ret = FALSE; 1128 continue; 1129 } 1130 } 1131 } 1132 break; 1133 1134 case (int) R_MICROBLAZE_32_SYM_OP_SYM: 1135 break; /* Do nothing. */ 1136 1137 case (int) R_MICROBLAZE_GOTPC_64: 1138 relocation = htab->sgotplt->output_section->vma 1139 + htab->sgotplt->output_offset; 1140 relocation -= (input_section->output_section->vma 1141 + input_section->output_offset 1142 + offset + INST_WORD_SIZE); 1143 relocation += addend; 1144 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff, 1145 contents + offset + endian); 1146 bfd_put_16 (input_bfd, relocation & 0xffff, 1147 contents + offset + endian + INST_WORD_SIZE); 1148 break; 1149 1150 case (int) R_MICROBLAZE_PLT_64: 1151 { 1152 bfd_vma immediate; 1153 if (htab->splt != NULL && h != NULL 1154 && h->plt.offset != (bfd_vma) -1) 1155 { 1156 relocation = (htab->splt->output_section->vma 1157 + htab->splt->output_offset 1158 + h->plt.offset); 1159 unresolved_reloc = FALSE; 1160 immediate = relocation - (input_section->output_section->vma 1161 + input_section->output_offset 1162 + offset + INST_WORD_SIZE); 1163 bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff, 1164 contents + offset + endian); 1165 bfd_put_16 (input_bfd, immediate & 0xffff, 1166 contents + offset + endian + INST_WORD_SIZE); 1167 } 1168 else 1169 { 1170 relocation -= (input_section->output_section->vma 1171 + input_section->output_offset 1172 + offset + INST_WORD_SIZE); 1173 immediate = relocation; 1174 bfd_put_16 (input_bfd, (immediate >> 16) & 0xffff, 1175 contents + offset + endian); 1176 bfd_put_16 (input_bfd, immediate & 0xffff, 1177 contents + offset + endian + INST_WORD_SIZE); 1178 } 1179 break; 1180 } 1181 1182 case (int) R_MICROBLAZE_TLSGD: 1183 tls_type = (TLS_TLS | TLS_GD); 1184 goto dogot; 1185 case (int) R_MICROBLAZE_TLSLD: 1186 tls_type = (TLS_TLS | TLS_LD); 1187 dogot: 1188 case (int) R_MICROBLAZE_GOT_64: 1189 { 1190 bfd_vma *offp; 1191 bfd_vma off, off2; 1192 unsigned long indx; 1193 bfd_vma static_value; 1194 1195 bfd_boolean need_relocs = FALSE; 1196 if (htab->sgot == NULL) 1197 abort (); 1198 1199 indx = 0; 1200 offp = NULL; 1201 1202 /* 1. Identify GOT Offset; 1203 2. Compute Static Values 1204 3. Process Module Id, Process Offset 1205 4. Fixup Relocation with GOT offset value. */ 1206 1207 /* 1. Determine GOT Offset to use : TLS_LD, global, local */ 1208 if (IS_TLS_LD (tls_type)) 1209 offp = &htab->tlsld_got.offset; 1210 else if (h != NULL) 1211 { 1212 if (htab->sgotplt != NULL && h->got.offset != (bfd_vma) -1) 1213 offp = &h->got.offset; 1214 else 1215 abort (); 1216 } 1217 else 1218 { 1219 if (local_got_offsets == NULL) 1220 abort (); 1221 offp = &local_got_offsets[r_symndx]; 1222 } 1223 1224 if (!offp) 1225 abort (); 1226 1227 off = (*offp) & ~1; 1228 off2 = off; 1229 1230 if (IS_TLS_LD(tls_type) || IS_TLS_GD(tls_type)) 1231 off2 = off + 4; 1232 1233 /* Symbol index to use for relocs */ 1234 if (h != NULL) 1235 { 1236 bfd_boolean dyn = 1237 elf_hash_table (info)->dynamic_sections_created; 1238 1239 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 1240 && (!info->shared || !SYMBOL_REFERENCES_LOCAL (info, h))) 1241 indx = h->dynindx; 1242 } 1243 1244 /* Need to generate relocs ? */ 1245 if ((info->shared || indx != 0) 1246 && (h == NULL 1247 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1248 || h->root.type != bfd_link_hash_undefweak)) 1249 need_relocs = TRUE; 1250 1251 /* 2. Compute/Emit Static value of r-expression */ 1252 static_value = relocation + addend; 1253 1254 /* 3. Process module-id and offset */ 1255 if (! ((*offp) & 1) ) 1256 { 1257 bfd_vma got_offset; 1258 1259 got_offset = (htab->sgot->output_section->vma 1260 + htab->sgot->output_offset 1261 + off); 1262 1263 /* Process module-id */ 1264 if (IS_TLS_LD(tls_type)) 1265 { 1266 if (! info->shared) 1267 { 1268 bfd_put_32 (output_bfd, 1, htab->sgot->contents + off); 1269 } 1270 else 1271 { 1272 microblaze_elf_output_dynamic_relocation (output_bfd, 1273 htab->srelgot, htab->srelgot->reloc_count++, 1274 /* symindex= */ 0, R_MICROBLAZE_TLSDTPMOD32, 1275 got_offset, 0); 1276 } 1277 } 1278 else if (IS_TLS_GD(tls_type)) 1279 { 1280 if (! need_relocs) 1281 { 1282 bfd_put_32 (output_bfd, 1, htab->sgot->contents + off); 1283 } 1284 else 1285 { 1286 microblaze_elf_output_dynamic_relocation (output_bfd, 1287 htab->srelgot, 1288 htab->srelgot->reloc_count++, 1289 /* symindex= */ indx, R_MICROBLAZE_TLSDTPMOD32, 1290 got_offset, indx ? 0 : static_value); 1291 } 1292 } 1293 1294 /* Process Offset */ 1295 if (htab->srelgot == NULL) 1296 abort (); 1297 1298 got_offset = (htab->sgot->output_section->vma 1299 + htab->sgot->output_offset 1300 + off2); 1301 if (IS_TLS_LD(tls_type)) 1302 { 1303 /* For LD, offset should be 0 */ 1304 *offp |= 1; 1305 bfd_put_32 (output_bfd, 0, htab->sgot->contents + off2); 1306 } 1307 else if (IS_TLS_GD(tls_type)) 1308 { 1309 *offp |= 1; 1310 static_value -= dtprel_base(info); 1311 if (need_relocs) 1312 { 1313 microblaze_elf_output_dynamic_relocation (output_bfd, 1314 htab->srelgot, htab->srelgot->reloc_count++, 1315 /* symindex= */ indx, R_MICROBLAZE_TLSDTPREL32, 1316 got_offset, indx ? 0 : static_value); 1317 } 1318 else 1319 { 1320 bfd_put_32 (output_bfd, static_value, 1321 htab->sgot->contents + off2); 1322 } 1323 } 1324 else 1325 { 1326 bfd_put_32 (output_bfd, static_value, 1327 htab->sgot->contents + off2); 1328 1329 /* Relocs for dyn symbols generated by 1330 finish_dynamic_symbols */ 1331 if (info->shared && h == NULL) 1332 { 1333 *offp |= 1; 1334 microblaze_elf_output_dynamic_relocation (output_bfd, 1335 htab->srelgot, htab->srelgot->reloc_count++, 1336 /* symindex= */ indx, R_MICROBLAZE_REL, 1337 got_offset, static_value); 1338 } 1339 } 1340 } 1341 1342 /* 4. Fixup Relocation with GOT offset value 1343 Compute relative address of GOT entry for applying 1344 the current relocation */ 1345 relocation = htab->sgot->output_section->vma 1346 + htab->sgot->output_offset 1347 + off 1348 - htab->sgotplt->output_section->vma 1349 - htab->sgotplt->output_offset; 1350 1351 /* Apply Current Relocation */ 1352 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff, 1353 contents + offset + endian); 1354 bfd_put_16 (input_bfd, relocation & 0xffff, 1355 contents + offset + endian + INST_WORD_SIZE); 1356 1357 unresolved_reloc = FALSE; 1358 break; 1359 } 1360 1361 case (int) R_MICROBLAZE_GOTOFF_64: 1362 { 1363 bfd_vma immediate; 1364 unsigned short lo, high; 1365 relocation += addend; 1366 relocation -= htab->sgotplt->output_section->vma 1367 + htab->sgotplt->output_offset; 1368 /* Write this value into correct location. */ 1369 immediate = relocation; 1370 lo = immediate & 0x0000ffff; 1371 high = (immediate >> 16) & 0x0000ffff; 1372 bfd_put_16 (input_bfd, high, contents + offset + endian); 1373 bfd_put_16 (input_bfd, lo, contents + offset + INST_WORD_SIZE + endian); 1374 break; 1375 } 1376 1377 case (int) R_MICROBLAZE_GOTOFF_32: 1378 { 1379 relocation += addend; 1380 relocation -= htab->sgotplt->output_section->vma 1381 + htab->sgotplt->output_offset; 1382 /* Write this value into correct location. */ 1383 bfd_put_32 (input_bfd, relocation, contents + offset); 1384 break; 1385 } 1386 1387 case (int) R_MICROBLAZE_TLSDTPREL64: 1388 relocation += addend; 1389 relocation -= dtprel_base(info); 1390 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff, 1391 contents + offset + 2); 1392 bfd_put_16 (input_bfd, relocation & 0xffff, 1393 contents + offset + 2 + INST_WORD_SIZE); 1394 break; 1395 case (int) R_MICROBLAZE_64_PCREL : 1396 case (int) R_MICROBLAZE_64: 1397 case (int) R_MICROBLAZE_32: 1398 { 1399 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols 1400 from removed linkonce sections, or sections discarded by 1401 a linker script. */ 1402 if (r_symndx == STN_UNDEF || (input_section->flags & SEC_ALLOC) == 0) 1403 { 1404 relocation += addend; 1405 if (r_type == R_MICROBLAZE_32) 1406 bfd_put_32 (input_bfd, relocation, contents + offset); 1407 else 1408 { 1409 if (r_type == R_MICROBLAZE_64_PCREL) 1410 relocation -= (input_section->output_section->vma 1411 + input_section->output_offset 1412 + offset + INST_WORD_SIZE); 1413 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff, 1414 contents + offset + endian); 1415 bfd_put_16 (input_bfd, relocation & 0xffff, 1416 contents + offset + endian + INST_WORD_SIZE); 1417 } 1418 break; 1419 } 1420 1421 if ((info->shared 1422 && (h == NULL 1423 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1424 || h->root.type != bfd_link_hash_undefweak) 1425 && (!howto->pc_relative 1426 || (h != NULL 1427 && h->dynindx != -1 1428 && (!info->symbolic 1429 || !h->def_regular)))) 1430 || (!info->shared 1431 && h != NULL 1432 && h->dynindx != -1 1433 && !h->non_got_ref 1434 && ((h->def_dynamic 1435 && !h->def_regular) 1436 || h->root.type == bfd_link_hash_undefweak 1437 || h->root.type == bfd_link_hash_undefined))) 1438 { 1439 Elf_Internal_Rela outrel; 1440 bfd_byte *loc; 1441 bfd_boolean skip; 1442 1443 /* When generating a shared object, these relocations 1444 are copied into the output file to be resolved at run 1445 time. */ 1446 1447 BFD_ASSERT (sreloc != NULL); 1448 1449 skip = FALSE; 1450 1451 outrel.r_offset = 1452 _bfd_elf_section_offset (output_bfd, info, input_section, 1453 rel->r_offset); 1454 if (outrel.r_offset == (bfd_vma) -1) 1455 skip = TRUE; 1456 else if (outrel.r_offset == (bfd_vma) -2) 1457 skip = TRUE; 1458 outrel.r_offset += (input_section->output_section->vma 1459 + input_section->output_offset); 1460 1461 if (skip) 1462 memset (&outrel, 0, sizeof outrel); 1463 /* h->dynindx may be -1 if the symbol was marked to 1464 become local. */ 1465 else if (h != NULL 1466 && ((! info->symbolic && h->dynindx != -1) 1467 || !h->def_regular)) 1468 { 1469 BFD_ASSERT (h->dynindx != -1); 1470 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 1471 outrel.r_addend = addend; 1472 } 1473 else 1474 { 1475 if (r_type == R_MICROBLAZE_32) 1476 { 1477 outrel.r_info = ELF32_R_INFO (0, R_MICROBLAZE_REL); 1478 outrel.r_addend = relocation + addend; 1479 } 1480 else 1481 { 1482 BFD_FAIL (); 1483 (*_bfd_error_handler) 1484 (_("%B: probably compiled without -fPIC?"), 1485 input_bfd); 1486 bfd_set_error (bfd_error_bad_value); 1487 return FALSE; 1488 } 1489 } 1490 1491 loc = sreloc->contents; 1492 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 1493 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1494 break; 1495 } 1496 else 1497 { 1498 relocation += addend; 1499 if (r_type == R_MICROBLAZE_32) 1500 bfd_put_32 (input_bfd, relocation, contents + offset); 1501 else 1502 { 1503 if (r_type == R_MICROBLAZE_64_PCREL) 1504 relocation -= (input_section->output_section->vma 1505 + input_section->output_offset 1506 + offset + INST_WORD_SIZE); 1507 bfd_put_16 (input_bfd, (relocation >> 16) & 0xffff, 1508 contents + offset + endian); 1509 bfd_put_16 (input_bfd, relocation & 0xffff, 1510 contents + offset + endian + INST_WORD_SIZE); 1511 } 1512 break; 1513 } 1514 } 1515 1516 default : 1517 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 1518 contents, offset, 1519 relocation, addend); 1520 break; 1521 } 1522 } 1523 1524 check_reloc: 1525 1526 if (r != bfd_reloc_ok) 1527 { 1528 /* FIXME: This should be generic enough to go in a utility. */ 1529 const char *name; 1530 1531 if (h != NULL) 1532 name = h->root.root.string; 1533 else 1534 { 1535 name = (bfd_elf_string_from_elf_section 1536 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 1537 if (name == NULL || *name == '\0') 1538 name = bfd_section_name (input_bfd, sec); 1539 } 1540 1541 if (errmsg != NULL) 1542 goto common_error; 1543 1544 switch (r) 1545 { 1546 case bfd_reloc_overflow: 1547 if (!((*info->callbacks->reloc_overflow) 1548 (info, (h ? &h->root : NULL), name, howto->name, 1549 (bfd_vma) 0, input_bfd, input_section, offset))) 1550 return FALSE; 1551 break; 1552 1553 case bfd_reloc_undefined: 1554 if (!((*info->callbacks->undefined_symbol) 1555 (info, name, input_bfd, input_section, offset, TRUE))) 1556 return FALSE; 1557 break; 1558 1559 case bfd_reloc_outofrange: 1560 errmsg = _("internal error: out of range error"); 1561 goto common_error; 1562 1563 case bfd_reloc_notsupported: 1564 errmsg = _("internal error: unsupported relocation error"); 1565 goto common_error; 1566 1567 case bfd_reloc_dangerous: 1568 errmsg = _("internal error: dangerous error"); 1569 goto common_error; 1570 1571 default: 1572 errmsg = _("internal error: unknown error"); 1573 /* Fall through. */ 1574 common_error: 1575 if (!((*info->callbacks->warning) 1576 (info, errmsg, name, input_bfd, input_section, offset))) 1577 return FALSE; 1578 break; 1579 } 1580 } 1581 } 1582 1583 return ret; 1584 } 1585 1586 /* Merge backend specific data from an object file to the output 1587 object file when linking. 1588 1589 Note: We only use this hook to catch endian mismatches. */ 1590 static bfd_boolean 1591 microblaze_elf_merge_private_bfd_data (bfd * ibfd, bfd * obfd) 1592 { 1593 /* Check if we have the same endianess. */ 1594 if (! _bfd_generic_verify_endian_match (ibfd, obfd)) 1595 return FALSE; 1596 1597 return TRUE; 1598 } 1599 1600 1601 /* Calculate fixup value for reference. */ 1602 1603 static int 1604 calc_fixup (bfd_vma start, bfd_vma size, asection *sec) 1605 { 1606 bfd_vma end = start + size; 1607 int i, fixup = 0; 1608 1609 if (sec == NULL || sec->relax == NULL) 1610 return 0; 1611 1612 /* Look for addr in relax table, total fixup value. */ 1613 for (i = 0; i < sec->relax_count; i++) 1614 { 1615 if (end <= sec->relax[i].addr) 1616 break; 1617 if ((end != start) && (start > sec->relax[i].addr)) 1618 continue; 1619 fixup += sec->relax[i].size; 1620 } 1621 return fixup; 1622 } 1623 1624 /* Read-modify-write into the bfd, an immediate value into appropriate fields of 1625 a 32-bit instruction. */ 1626 static void 1627 microblaze_bfd_write_imm_value_32 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val) 1628 { 1629 unsigned long instr = bfd_get_32 (abfd, bfd_addr); 1630 instr &= ~0x0000ffff; 1631 instr |= (val & 0x0000ffff); 1632 bfd_put_32 (abfd, instr, bfd_addr); 1633 } 1634 1635 /* Read-modify-write into the bfd, an immediate value into appropriate fields of 1636 two consecutive 32-bit instructions. */ 1637 static void 1638 microblaze_bfd_write_imm_value_64 (bfd *abfd, bfd_byte *bfd_addr, bfd_vma val) 1639 { 1640 unsigned long instr_hi; 1641 unsigned long instr_lo; 1642 1643 instr_hi = bfd_get_32 (abfd, bfd_addr); 1644 instr_hi &= ~0x0000ffff; 1645 instr_hi |= ((val >> 16) & 0x0000ffff); 1646 bfd_put_32 (abfd, instr_hi, bfd_addr); 1647 1648 instr_lo = bfd_get_32 (abfd, bfd_addr + INST_WORD_SIZE); 1649 instr_lo &= ~0x0000ffff; 1650 instr_lo |= (val & 0x0000ffff); 1651 bfd_put_32 (abfd, instr_lo, bfd_addr + INST_WORD_SIZE); 1652 } 1653 1654 static bfd_boolean 1655 microblaze_elf_relax_section (bfd *abfd, 1656 asection *sec, 1657 struct bfd_link_info *link_info, 1658 bfd_boolean *again) 1659 { 1660 Elf_Internal_Shdr *symtab_hdr; 1661 Elf_Internal_Rela *internal_relocs; 1662 Elf_Internal_Rela *free_relocs = NULL; 1663 Elf_Internal_Rela *irel, *irelend; 1664 bfd_byte *contents = NULL; 1665 bfd_byte *free_contents = NULL; 1666 int rel_count; 1667 unsigned int shndx; 1668 int i, sym_index; 1669 asection *o; 1670 struct elf_link_hash_entry *sym_hash; 1671 Elf_Internal_Sym *isymbuf, *isymend; 1672 Elf_Internal_Sym *isym; 1673 int symcount; 1674 int offset; 1675 bfd_vma src, dest; 1676 1677 /* We only do this once per section. We may be able to delete some code 1678 by running multiple passes, but it is not worth it. */ 1679 *again = FALSE; 1680 1681 /* Only do this for a text section. */ 1682 if (link_info->relocatable 1683 || (sec->flags & SEC_RELOC) == 0 1684 || (sec->reloc_count == 0) 1685 || (sec->flags & SEC_CODE) == 0) 1686 return TRUE; 1687 1688 BFD_ASSERT ((sec->size > 0) || (sec->rawsize > 0)); 1689 1690 /* If this is the first time we have been called for this section, 1691 initialize the cooked size. */ 1692 if (sec->size == 0) 1693 sec->size = sec->rawsize; 1694 1695 /* Get symbols for this section. */ 1696 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1697 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 1698 symcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym); 1699 if (isymbuf == NULL) 1700 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, symcount, 1701 0, NULL, NULL, NULL); 1702 BFD_ASSERT (isymbuf != NULL); 1703 1704 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory); 1705 if (internal_relocs == NULL) 1706 goto error_return; 1707 if (! link_info->keep_memory) 1708 free_relocs = internal_relocs; 1709 1710 sec->relax = (struct relax_table *) bfd_malloc ((sec->reloc_count + 1) 1711 * sizeof (struct relax_table)); 1712 if (sec->relax == NULL) 1713 goto error_return; 1714 sec->relax_count = 0; 1715 1716 irelend = internal_relocs + sec->reloc_count; 1717 rel_count = 0; 1718 for (irel = internal_relocs; irel < irelend; irel++, rel_count++) 1719 { 1720 bfd_vma symval; 1721 if ((ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64_PCREL) 1722 && (ELF32_R_TYPE (irel->r_info) != (int) R_MICROBLAZE_64 )) 1723 continue; /* Can't delete this reloc. */ 1724 1725 /* Get the section contents. */ 1726 if (contents == NULL) 1727 { 1728 if (elf_section_data (sec)->this_hdr.contents != NULL) 1729 contents = elf_section_data (sec)->this_hdr.contents; 1730 else 1731 { 1732 contents = (bfd_byte *) bfd_malloc (sec->size); 1733 if (contents == NULL) 1734 goto error_return; 1735 free_contents = contents; 1736 1737 if (!bfd_get_section_contents (abfd, sec, contents, 1738 (file_ptr) 0, sec->size)) 1739 goto error_return; 1740 elf_section_data (sec)->this_hdr.contents = contents; 1741 } 1742 } 1743 1744 /* Get the value of the symbol referred to by the reloc. */ 1745 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 1746 { 1747 /* A local symbol. */ 1748 asection *sym_sec; 1749 1750 isym = isymbuf + ELF32_R_SYM (irel->r_info); 1751 if (isym->st_shndx == SHN_UNDEF) 1752 sym_sec = bfd_und_section_ptr; 1753 else if (isym->st_shndx == SHN_ABS) 1754 sym_sec = bfd_abs_section_ptr; 1755 else if (isym->st_shndx == SHN_COMMON) 1756 sym_sec = bfd_com_section_ptr; 1757 else 1758 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); 1759 1760 symval = _bfd_elf_rela_local_sym (abfd, isym, &sym_sec, irel); 1761 } 1762 else 1763 { 1764 unsigned long indx; 1765 struct elf_link_hash_entry *h; 1766 1767 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 1768 h = elf_sym_hashes (abfd)[indx]; 1769 BFD_ASSERT (h != NULL); 1770 1771 if (h->root.type != bfd_link_hash_defined 1772 && h->root.type != bfd_link_hash_defweak) 1773 /* This appears to be a reference to an undefined 1774 symbol. Just ignore it--it will be caught by the 1775 regular reloc processing. */ 1776 continue; 1777 1778 symval = (h->root.u.def.value 1779 + h->root.u.def.section->output_section->vma 1780 + h->root.u.def.section->output_offset); 1781 } 1782 1783 /* If this is a PC-relative reloc, subtract the instr offset from 1784 the symbol value. */ 1785 if (ELF32_R_TYPE (irel->r_info) == (int) R_MICROBLAZE_64_PCREL) 1786 { 1787 symval = symval + irel->r_addend 1788 - (irel->r_offset 1789 + sec->output_section->vma 1790 + sec->output_offset); 1791 } 1792 else 1793 symval += irel->r_addend; 1794 1795 if ((symval & 0xffff8000) == 0 1796 || (symval & 0xffff8000) == 0xffff8000) 1797 { 1798 /* We can delete this instruction. */ 1799 sec->relax[sec->relax_count].addr = irel->r_offset; 1800 sec->relax[sec->relax_count].size = INST_WORD_SIZE; 1801 sec->relax_count++; 1802 1803 /* Rewrite relocation type. */ 1804 switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info)) 1805 { 1806 case R_MICROBLAZE_64_PCREL: 1807 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 1808 (int) R_MICROBLAZE_32_PCREL_LO); 1809 break; 1810 case R_MICROBLAZE_64: 1811 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 1812 (int) R_MICROBLAZE_32_LO); 1813 break; 1814 default: 1815 /* Cannot happen. */ 1816 BFD_ASSERT (FALSE); 1817 } 1818 } 1819 } /* Loop through all relocations. */ 1820 1821 /* Loop through the relocs again, and see if anything needs to change. */ 1822 if (sec->relax_count > 0) 1823 { 1824 shndx = _bfd_elf_section_from_bfd_section (abfd, sec); 1825 rel_count = 0; 1826 sec->relax[sec->relax_count].addr = sec->size; 1827 1828 for (irel = internal_relocs; irel < irelend; irel++, rel_count++) 1829 { 1830 bfd_vma nraddr; 1831 1832 /* Get the new reloc address. */ 1833 nraddr = irel->r_offset - calc_fixup (irel->r_offset, 0, sec); 1834 switch ((enum elf_microblaze_reloc_type) ELF32_R_TYPE (irel->r_info)) 1835 { 1836 default: 1837 break; 1838 case R_MICROBLAZE_64_PCREL: 1839 break; 1840 case R_MICROBLAZE_64: 1841 case R_MICROBLAZE_32_LO: 1842 /* If this reloc is against a symbol defined in this 1843 section, we must check the addend to see it will put the value in 1844 range to be adjusted, and hence must be changed. */ 1845 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 1846 { 1847 isym = isymbuf + ELF32_R_SYM (irel->r_info); 1848 /* Only handle relocs against .text. */ 1849 if (isym->st_shndx == shndx 1850 && ELF32_ST_TYPE (isym->st_info) == STT_SECTION) 1851 irel->r_addend -= calc_fixup (irel->r_addend, 0, sec); 1852 } 1853 break; 1854 case R_MICROBLAZE_NONE: 1855 { 1856 /* This was a PC-relative instruction that was 1857 completely resolved. */ 1858 int sfix, efix; 1859 bfd_vma target_address; 1860 target_address = irel->r_addend + irel->r_offset; 1861 sfix = calc_fixup (irel->r_offset, 0, sec); 1862 efix = calc_fixup (target_address, 0, sec); 1863 irel->r_addend -= (efix - sfix); 1864 /* Should use HOWTO. */ 1865 microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset, 1866 irel->r_addend); 1867 } 1868 break; 1869 case R_MICROBLAZE_64_NONE: 1870 { 1871 /* This was a PC-relative 64-bit instruction that was 1872 completely resolved. */ 1873 int sfix, efix; 1874 bfd_vma target_address; 1875 target_address = irel->r_addend + irel->r_offset + INST_WORD_SIZE; 1876 sfix = calc_fixup (irel->r_offset + INST_WORD_SIZE, 0, sec); 1877 efix = calc_fixup (target_address, 0, sec); 1878 irel->r_addend -= (efix - sfix); 1879 microblaze_bfd_write_imm_value_32 (abfd, contents + irel->r_offset 1880 + INST_WORD_SIZE, irel->r_addend); 1881 } 1882 break; 1883 } 1884 irel->r_offset = nraddr; 1885 } /* Change all relocs in this section. */ 1886 1887 /* Look through all other sections. */ 1888 for (o = abfd->sections; o != NULL; o = o->next) 1889 { 1890 Elf_Internal_Rela *irelocs; 1891 Elf_Internal_Rela *irelscan, *irelscanend; 1892 bfd_byte *ocontents; 1893 1894 if (o == sec 1895 || (o->flags & SEC_RELOC) == 0 1896 || o->reloc_count == 0) 1897 continue; 1898 1899 /* We always cache the relocs. Perhaps, if info->keep_memory is 1900 FALSE, we should free them, if we are permitted to. */ 1901 1902 irelocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, TRUE); 1903 if (irelocs == NULL) 1904 goto error_return; 1905 1906 ocontents = NULL; 1907 irelscanend = irelocs + o->reloc_count; 1908 for (irelscan = irelocs; irelscan < irelscanend; irelscan++) 1909 { 1910 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32) 1911 { 1912 isym = isymbuf + ELF32_R_SYM (irelscan->r_info); 1913 1914 /* Look at the reloc only if the value has been resolved. */ 1915 if (isym->st_shndx == shndx 1916 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION)) 1917 { 1918 if (ocontents == NULL) 1919 { 1920 if (elf_section_data (o)->this_hdr.contents != NULL) 1921 ocontents = elf_section_data (o)->this_hdr.contents; 1922 else 1923 { 1924 /* We always cache the section contents. 1925 Perhaps, if info->keep_memory is FALSE, we 1926 should free them, if we are permitted to. */ 1927 if (o->rawsize == 0) 1928 o->rawsize = o->size; 1929 ocontents = (bfd_byte *) bfd_malloc (o->rawsize); 1930 if (ocontents == NULL) 1931 goto error_return; 1932 if (!bfd_get_section_contents (abfd, o, ocontents, 1933 (file_ptr) 0, 1934 o->rawsize)) 1935 goto error_return; 1936 elf_section_data (o)->this_hdr.contents = ocontents; 1937 } 1938 1939 } 1940 irelscan->r_addend -= calc_fixup (irelscan->r_addend, 0, sec); 1941 } 1942 else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_SYM_OP_SYM) 1943 { 1944 isym = isymbuf + ELF32_R_SYM (irelscan->r_info); 1945 1946 /* Look at the reloc only if the value has been resolved. */ 1947 if (ocontents == NULL) 1948 { 1949 if (elf_section_data (o)->this_hdr.contents != NULL) 1950 ocontents = elf_section_data (o)->this_hdr.contents; 1951 else 1952 { 1953 /* We always cache the section contents. 1954 Perhaps, if info->keep_memory is FALSE, we 1955 should free them, if we are permitted to. */ 1956 1957 if (o->rawsize == 0) 1958 o->rawsize = o->size; 1959 ocontents = (bfd_byte *) bfd_malloc (o->rawsize); 1960 if (ocontents == NULL) 1961 goto error_return; 1962 if (!bfd_get_section_contents (abfd, o, ocontents, 1963 (file_ptr) 0, 1964 o->rawsize)) 1965 goto error_return; 1966 elf_section_data (o)->this_hdr.contents = ocontents; 1967 } 1968 } 1969 irelscan->r_addend -= calc_fixup (irel->r_addend 1970 + isym->st_value, 1971 0, 1972 sec); 1973 } 1974 } 1975 else if ((ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_PCREL_LO) 1976 || (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_32_LO)) 1977 { 1978 isym = isymbuf + ELF32_R_SYM (irelscan->r_info); 1979 1980 /* Look at the reloc only if the value has been resolved. */ 1981 if (isym->st_shndx == shndx 1982 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION)) 1983 { 1984 bfd_vma immediate; 1985 bfd_vma target_address; 1986 1987 if (ocontents == NULL) 1988 { 1989 if (elf_section_data (o)->this_hdr.contents != NULL) 1990 ocontents = elf_section_data (o)->this_hdr.contents; 1991 else 1992 { 1993 /* We always cache the section contents. 1994 Perhaps, if info->keep_memory is FALSE, we 1995 should free them, if we are permitted to. */ 1996 if (o->rawsize == 0) 1997 o->rawsize = o->size; 1998 ocontents = (bfd_byte *) bfd_malloc (o->rawsize); 1999 if (ocontents == NULL) 2000 goto error_return; 2001 if (!bfd_get_section_contents (abfd, o, ocontents, 2002 (file_ptr) 0, 2003 o->rawsize)) 2004 goto error_return; 2005 elf_section_data (o)->this_hdr.contents = ocontents; 2006 } 2007 } 2008 2009 unsigned long instr = bfd_get_32 (abfd, ocontents + irelscan->r_offset); 2010 immediate = instr & 0x0000ffff; 2011 target_address = immediate; 2012 offset = calc_fixup (target_address, 0, sec); 2013 immediate -= offset; 2014 irelscan->r_addend -= offset; 2015 microblaze_bfd_write_imm_value_32 (abfd, ocontents + irelscan->r_offset, 2016 irelscan->r_addend); 2017 } 2018 } 2019 2020 if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64) 2021 { 2022 isym = isymbuf + ELF32_R_SYM (irelscan->r_info); 2023 2024 /* Look at the reloc only if the value has been resolved. */ 2025 if (isym->st_shndx == shndx 2026 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION)) 2027 { 2028 bfd_vma immediate; 2029 2030 if (ocontents == NULL) 2031 { 2032 if (elf_section_data (o)->this_hdr.contents != NULL) 2033 ocontents = elf_section_data (o)->this_hdr.contents; 2034 else 2035 { 2036 /* We always cache the section contents. 2037 Perhaps, if info->keep_memory is FALSE, we 2038 should free them, if we are permitted to. */ 2039 2040 if (o->rawsize == 0) 2041 o->rawsize = o->size; 2042 ocontents = (bfd_byte *) bfd_malloc (o->rawsize); 2043 if (ocontents == NULL) 2044 goto error_return; 2045 if (!bfd_get_section_contents (abfd, o, ocontents, 2046 (file_ptr) 0, 2047 o->rawsize)) 2048 goto error_return; 2049 elf_section_data (o)->this_hdr.contents = ocontents; 2050 } 2051 } 2052 unsigned long instr_hi = bfd_get_32 (abfd, ocontents 2053 + irelscan->r_offset); 2054 unsigned long instr_lo = bfd_get_32 (abfd, ocontents 2055 + irelscan->r_offset 2056 + INST_WORD_SIZE); 2057 immediate = (instr_hi & 0x0000ffff) << 16; 2058 immediate |= (instr_lo & 0x0000ffff); 2059 offset = calc_fixup (irelscan->r_addend, 0, sec); 2060 immediate -= offset; 2061 irelscan->r_addend -= offset; 2062 } 2063 } 2064 else if (ELF32_R_TYPE (irelscan->r_info) == (int) R_MICROBLAZE_64_PCREL) 2065 { 2066 isym = isymbuf + ELF32_R_SYM (irelscan->r_info); 2067 2068 /* Look at the reloc only if the value has been resolved. */ 2069 if (isym->st_shndx == shndx 2070 && (ELF32_ST_TYPE (isym->st_info) == STT_SECTION)) 2071 { 2072 bfd_vma immediate; 2073 bfd_vma target_address; 2074 2075 if (ocontents == NULL) 2076 { 2077 if (elf_section_data (o)->this_hdr.contents != NULL) 2078 ocontents = elf_section_data (o)->this_hdr.contents; 2079 else 2080 { 2081 /* We always cache the section contents. 2082 Perhaps, if info->keep_memory is FALSE, we 2083 should free them, if we are permitted to. */ 2084 if (o->rawsize == 0) 2085 o->rawsize = o->size; 2086 ocontents = (bfd_byte *) bfd_malloc (o->rawsize); 2087 if (ocontents == NULL) 2088 goto error_return; 2089 if (!bfd_get_section_contents (abfd, o, ocontents, 2090 (file_ptr) 0, 2091 o->rawsize)) 2092 goto error_return; 2093 elf_section_data (o)->this_hdr.contents = ocontents; 2094 } 2095 } 2096 unsigned long instr_hi = bfd_get_32 (abfd, ocontents 2097 + irelscan->r_offset); 2098 unsigned long instr_lo = bfd_get_32 (abfd, ocontents 2099 + irelscan->r_offset 2100 + INST_WORD_SIZE); 2101 immediate = (instr_hi & 0x0000ffff) << 16; 2102 immediate |= (instr_lo & 0x0000ffff); 2103 target_address = immediate; 2104 offset = calc_fixup (target_address, 0, sec); 2105 immediate -= offset; 2106 irelscan->r_addend -= offset; 2107 microblaze_bfd_write_imm_value_64 (abfd, ocontents 2108 + irelscan->r_offset, immediate); 2109 } 2110 } 2111 } 2112 } 2113 2114 /* Adjust the local symbols defined in this section. */ 2115 isymend = isymbuf + symtab_hdr->sh_info; 2116 for (isym = isymbuf; isym < isymend; isym++) 2117 { 2118 if (isym->st_shndx == shndx) 2119 { 2120 isym->st_value -= calc_fixup (isym->st_value, 0, sec); 2121 if (isym->st_size) 2122 isym->st_size -= calc_fixup (isym->st_value, isym->st_size, sec); 2123 } 2124 } 2125 2126 /* Now adjust the global symbols defined in this section. */ 2127 isym = isymbuf + symtab_hdr->sh_info; 2128 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)) - symtab_hdr->sh_info; 2129 for (sym_index = 0; sym_index < symcount; sym_index++) 2130 { 2131 sym_hash = elf_sym_hashes (abfd)[sym_index]; 2132 if ((sym_hash->root.type == bfd_link_hash_defined 2133 || sym_hash->root.type == bfd_link_hash_defweak) 2134 && sym_hash->root.u.def.section == sec) 2135 { 2136 sym_hash->root.u.def.value -= calc_fixup (sym_hash->root.u.def.value, 2137 0, sec); 2138 if (sym_hash->size) 2139 sym_hash->size -= calc_fixup (sym_hash->root.u.def.value, 2140 sym_hash->size, sec); 2141 } 2142 } 2143 2144 /* Physically move the code and change the cooked size. */ 2145 dest = sec->relax[0].addr; 2146 for (i = 0; i < sec->relax_count; i++) 2147 { 2148 int len; 2149 src = sec->relax[i].addr + sec->relax[i].size; 2150 len = sec->relax[i+1].addr - sec->relax[i].addr - sec->relax[i].size; 2151 2152 memmove (contents + dest, contents + src, len); 2153 sec->size -= sec->relax[i].size; 2154 dest += len; 2155 } 2156 2157 elf_section_data (sec)->relocs = internal_relocs; 2158 free_relocs = NULL; 2159 2160 elf_section_data (sec)->this_hdr.contents = contents; 2161 free_contents = NULL; 2162 2163 symtab_hdr->contents = (bfd_byte *) isymbuf; 2164 } 2165 2166 if (free_relocs != NULL) 2167 { 2168 free (free_relocs); 2169 free_relocs = NULL; 2170 } 2171 2172 if (free_contents != NULL) 2173 { 2174 if (!link_info->keep_memory) 2175 free (free_contents); 2176 else 2177 /* Cache the section contents for elf_link_input_bfd. */ 2178 elf_section_data (sec)->this_hdr.contents = contents; 2179 free_contents = NULL; 2180 } 2181 2182 if (sec->relax_count == 0) 2183 { 2184 *again = FALSE; 2185 free (sec->relax); 2186 sec->relax = NULL; 2187 } 2188 else 2189 *again = TRUE; 2190 return TRUE; 2191 2192 error_return: 2193 if (free_relocs != NULL) 2194 free (free_relocs); 2195 if (free_contents != NULL) 2196 free (free_contents); 2197 if (sec->relax != NULL) 2198 { 2199 free (sec->relax); 2200 sec->relax = NULL; 2201 sec->relax_count = 0; 2202 } 2203 return FALSE; 2204 } 2205 2206 /* Return the section that should be marked against GC for a given 2207 relocation. */ 2208 2209 static asection * 2210 microblaze_elf_gc_mark_hook (asection *sec, 2211 struct bfd_link_info * info, 2212 Elf_Internal_Rela * rel, 2213 struct elf_link_hash_entry * h, 2214 Elf_Internal_Sym * sym) 2215 { 2216 if (h != NULL) 2217 switch (ELF32_R_TYPE (rel->r_info)) 2218 { 2219 case R_MICROBLAZE_GNU_VTINHERIT: 2220 case R_MICROBLAZE_GNU_VTENTRY: 2221 return NULL; 2222 } 2223 2224 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 2225 } 2226 2227 /* Update the got entry reference counts for the section being removed. */ 2228 2229 static bfd_boolean 2230 microblaze_elf_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED, 2231 struct bfd_link_info * info ATTRIBUTE_UNUSED, 2232 asection * sec ATTRIBUTE_UNUSED, 2233 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED) 2234 { 2235 return TRUE; 2236 } 2237 2238 /* PIC support. */ 2239 2240 #define PLT_ENTRY_SIZE 16 2241 2242 #define PLT_ENTRY_WORD_0 0xb0000000 /* "imm 0". */ 2243 #define PLT_ENTRY_WORD_1 0xe9940000 /* "lwi r12,r20,0" - relocated to lwi r12,r20,func@GOT. */ 2244 #define PLT_ENTRY_WORD_1_NOPIC 0xe9800000 /* "lwi r12,r0,0" - non-PIC object. */ 2245 #define PLT_ENTRY_WORD_2 0x98186000 /* "brad r12". */ 2246 #define PLT_ENTRY_WORD_3 0x80000000 /* "nop". */ 2247 2248 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up 2249 shortcuts to them in our hash table. */ 2250 2251 static bfd_boolean 2252 create_got_section (bfd *dynobj, struct bfd_link_info *info) 2253 { 2254 struct elf32_mb_link_hash_table *htab; 2255 2256 if (! _bfd_elf_create_got_section (dynobj, info)) 2257 return FALSE; 2258 htab = elf32_mb_hash_table (info); 2259 if (htab == NULL) 2260 return FALSE; 2261 2262 htab->sgot = bfd_get_linker_section (dynobj, ".got"); 2263 htab->sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); 2264 if (!htab->sgot || !htab->sgotplt) 2265 return FALSE; 2266 2267 if ((htab->srelgot = bfd_get_linker_section (dynobj, ".rela.got")) == NULL) 2268 htab->srelgot = bfd_make_section_anyway (dynobj, ".rela.got"); 2269 if (htab->srelgot == NULL 2270 || ! bfd_set_section_flags (dynobj, htab->srelgot, SEC_ALLOC 2271 | SEC_LOAD 2272 | SEC_HAS_CONTENTS 2273 | SEC_IN_MEMORY 2274 | SEC_LINKER_CREATED 2275 | SEC_READONLY) 2276 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) 2277 return FALSE; 2278 return TRUE; 2279 } 2280 2281 static bfd_boolean 2282 update_local_sym_info (bfd *abfd, 2283 Elf_Internal_Shdr *symtab_hdr, 2284 unsigned long r_symndx, 2285 unsigned int tls_type) 2286 { 2287 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); 2288 unsigned char *local_got_tls_masks; 2289 2290 if (local_got_refcounts == NULL) 2291 { 2292 bfd_size_type size = symtab_hdr->sh_info; 2293 2294 size *= (sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks)); 2295 local_got_refcounts = bfd_zalloc (abfd, size); 2296 if (local_got_refcounts == NULL) 2297 return FALSE; 2298 elf_local_got_refcounts (abfd) = local_got_refcounts; 2299 } 2300 2301 local_got_tls_masks = 2302 (unsigned char *) (local_got_refcounts + symtab_hdr->sh_info); 2303 local_got_tls_masks[r_symndx] |= tls_type; 2304 local_got_refcounts[r_symndx] += 1; 2305 2306 return TRUE; 2307 } 2308 /* Look through the relocs for a section during the first phase. */ 2309 2310 static bfd_boolean 2311 microblaze_elf_check_relocs (bfd * abfd, 2312 struct bfd_link_info * info, 2313 asection * sec, 2314 const Elf_Internal_Rela * relocs) 2315 { 2316 Elf_Internal_Shdr * symtab_hdr; 2317 struct elf_link_hash_entry ** sym_hashes; 2318 struct elf_link_hash_entry ** sym_hashes_end; 2319 const Elf_Internal_Rela * rel; 2320 const Elf_Internal_Rela * rel_end; 2321 struct elf32_mb_link_hash_table *htab; 2322 asection *sreloc = NULL; 2323 2324 if (info->relocatable) 2325 return TRUE; 2326 2327 htab = elf32_mb_hash_table (info); 2328 if (htab == NULL) 2329 return FALSE; 2330 2331 symtab_hdr = & elf_tdata (abfd)->symtab_hdr; 2332 sym_hashes = elf_sym_hashes (abfd); 2333 sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); 2334 if (!elf_bad_symtab (abfd)) 2335 sym_hashes_end -= symtab_hdr->sh_info; 2336 2337 rel_end = relocs + sec->reloc_count; 2338 2339 for (rel = relocs; rel < rel_end; rel++) 2340 { 2341 unsigned int r_type; 2342 struct elf_link_hash_entry * h; 2343 unsigned long r_symndx; 2344 unsigned char tls_type = 0; 2345 2346 r_symndx = ELF32_R_SYM (rel->r_info); 2347 r_type = ELF32_R_TYPE (rel->r_info); 2348 2349 if (r_symndx < symtab_hdr->sh_info) 2350 h = NULL; 2351 else 2352 { 2353 h = sym_hashes [r_symndx - symtab_hdr->sh_info]; 2354 2355 /* PR15323, ref flags aren't set for references in the same 2356 object. */ 2357 h->root.non_ir_ref = 1; 2358 } 2359 2360 switch (r_type) 2361 { 2362 /* This relocation describes the C++ object vtable hierarchy. 2363 Reconstruct it for later use during GC. */ 2364 case R_MICROBLAZE_GNU_VTINHERIT: 2365 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 2366 return FALSE; 2367 break; 2368 2369 /* This relocation describes which C++ vtable entries are actually 2370 used. Record for later use during GC. */ 2371 case R_MICROBLAZE_GNU_VTENTRY: 2372 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 2373 return FALSE; 2374 break; 2375 2376 /* This relocation requires .plt entry. */ 2377 case R_MICROBLAZE_PLT_64: 2378 if (h != NULL) 2379 { 2380 h->needs_plt = 1; 2381 h->plt.refcount += 1; 2382 } 2383 break; 2384 2385 /* This relocation requires .got entry. */ 2386 case R_MICROBLAZE_TLSGD: 2387 tls_type |= (TLS_TLS | TLS_GD); 2388 goto dogottls; 2389 case R_MICROBLAZE_TLSLD: 2390 tls_type |= (TLS_TLS | TLS_LD); 2391 dogottls: 2392 sec->has_tls_reloc = 1; 2393 case R_MICROBLAZE_GOT_64: 2394 if (htab->sgot == NULL) 2395 { 2396 if (htab->elf.dynobj == NULL) 2397 htab->elf.dynobj = abfd; 2398 if (!create_got_section (htab->elf.dynobj, info)) 2399 return FALSE; 2400 } 2401 if (h != NULL) 2402 { 2403 h->got.refcount += 1; 2404 elf32_mb_hash_entry (h)->tls_mask |= tls_type; 2405 } 2406 else 2407 { 2408 if (! update_local_sym_info(abfd, symtab_hdr, r_symndx, tls_type) ) 2409 return FALSE; 2410 } 2411 break; 2412 2413 case R_MICROBLAZE_64: 2414 case R_MICROBLAZE_64_PCREL: 2415 case R_MICROBLAZE_32: 2416 { 2417 if (h != NULL && !info->shared) 2418 { 2419 /* we may need a copy reloc. */ 2420 h->non_got_ref = 1; 2421 2422 /* we may also need a .plt entry. */ 2423 h->plt.refcount += 1; 2424 if (ELF32_R_TYPE (rel->r_info) != R_MICROBLAZE_64_PCREL) 2425 h->pointer_equality_needed = 1; 2426 } 2427 2428 2429 /* If we are creating a shared library, and this is a reloc 2430 against a global symbol, or a non PC relative reloc 2431 against a local symbol, then we need to copy the reloc 2432 into the shared library. However, if we are linking with 2433 -Bsymbolic, we do not need to copy a reloc against a 2434 global symbol which is defined in an object we are 2435 including in the link (i.e., DEF_REGULAR is set). At 2436 this point we have not seen all the input files, so it is 2437 possible that DEF_REGULAR is not set now but will be set 2438 later (it is never cleared). In case of a weak definition, 2439 DEF_REGULAR may be cleared later by a strong definition in 2440 a shared library. We account for that possibility below by 2441 storing information in the relocs_copied field of the hash 2442 table entry. A similar situation occurs when creating 2443 shared libraries and symbol visibility changes render the 2444 symbol local. 2445 2446 If on the other hand, we are creating an executable, we 2447 may need to keep relocations for symbols satisfied by a 2448 dynamic library if we manage to avoid copy relocs for the 2449 symbol. */ 2450 2451 if ((info->shared 2452 && (sec->flags & SEC_ALLOC) != 0 2453 && (r_type != R_MICROBLAZE_64_PCREL 2454 || (h != NULL 2455 && (! info->symbolic 2456 || h->root.type == bfd_link_hash_defweak 2457 || !h->def_regular)))) 2458 || (!info->shared 2459 && (sec->flags & SEC_ALLOC) != 0 2460 && h != NULL 2461 && (h->root.type == bfd_link_hash_defweak 2462 || !h->def_regular))) 2463 { 2464 struct elf32_mb_dyn_relocs *p; 2465 struct elf32_mb_dyn_relocs **head; 2466 2467 /* When creating a shared object, we must copy these 2468 relocs into the output file. We create a reloc 2469 section in dynobj and make room for the reloc. */ 2470 2471 if (sreloc == NULL) 2472 { 2473 bfd *dynobj; 2474 2475 if (htab->elf.dynobj == NULL) 2476 htab->elf.dynobj = abfd; 2477 dynobj = htab->elf.dynobj; 2478 2479 sreloc = _bfd_elf_make_dynamic_reloc_section (sec, dynobj, 2480 2, abfd, 1); 2481 if (sreloc == NULL) 2482 return FALSE; 2483 } 2484 2485 /* If this is a global symbol, we count the number of 2486 relocations we need for this symbol. */ 2487 if (h != NULL) 2488 head = &((struct elf32_mb_link_hash_entry *) h)->dyn_relocs; 2489 else 2490 { 2491 /* Track dynamic relocs needed for local syms too. 2492 We really need local syms available to do this 2493 easily. Oh well. */ 2494 2495 asection *s; 2496 Elf_Internal_Sym *isym; 2497 void *vpp; 2498 2499 isym = bfd_sym_from_r_symndx (&htab->sym_sec, 2500 abfd, r_symndx); 2501 if (isym == NULL) 2502 return FALSE; 2503 2504 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 2505 if (s == NULL) 2506 return FALSE; 2507 2508 vpp = &elf_section_data (s)->local_dynrel; 2509 head = (struct elf32_mb_dyn_relocs **) vpp; 2510 } 2511 2512 p = *head; 2513 if (p == NULL || p->sec != sec) 2514 { 2515 bfd_size_type amt = sizeof *p; 2516 p = ((struct elf32_mb_dyn_relocs *) 2517 bfd_alloc (htab->elf.dynobj, amt)); 2518 if (p == NULL) 2519 return FALSE; 2520 p->next = *head; 2521 *head = p; 2522 p->sec = sec; 2523 p->count = 0; 2524 p->pc_count = 0; 2525 } 2526 2527 p->count += 1; 2528 if (r_type == R_MICROBLAZE_64_PCREL) 2529 p->pc_count += 1; 2530 } 2531 } 2532 break; 2533 } 2534 } 2535 2536 return TRUE; 2537 } 2538 2539 static bfd_boolean 2540 microblaze_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) 2541 { 2542 struct elf32_mb_link_hash_table *htab; 2543 2544 htab = elf32_mb_hash_table (info); 2545 if (htab == NULL) 2546 return FALSE; 2547 2548 if (!htab->sgot && !create_got_section (dynobj, info)) 2549 return FALSE; 2550 2551 if (!_bfd_elf_create_dynamic_sections (dynobj, info)) 2552 return FALSE; 2553 2554 htab->splt = bfd_get_linker_section (dynobj, ".plt"); 2555 htab->srelplt = bfd_get_linker_section (dynobj, ".rela.plt"); 2556 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); 2557 if (!info->shared) 2558 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); 2559 2560 if (!htab->splt || !htab->srelplt || !htab->sdynbss 2561 || (!info->shared && !htab->srelbss)) 2562 abort (); 2563 2564 return TRUE; 2565 } 2566 2567 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 2568 2569 static void 2570 microblaze_elf_copy_indirect_symbol (struct bfd_link_info *info, 2571 struct elf_link_hash_entry *dir, 2572 struct elf_link_hash_entry *ind) 2573 { 2574 struct elf32_mb_link_hash_entry *edir, *eind; 2575 2576 edir = (struct elf32_mb_link_hash_entry *) dir; 2577 eind = (struct elf32_mb_link_hash_entry *) ind; 2578 2579 if (eind->dyn_relocs != NULL) 2580 { 2581 if (edir->dyn_relocs != NULL) 2582 { 2583 struct elf32_mb_dyn_relocs **pp; 2584 struct elf32_mb_dyn_relocs *p; 2585 2586 if (ind->root.type == bfd_link_hash_indirect) 2587 abort (); 2588 2589 /* Add reloc counts against the weak sym to the strong sym 2590 list. Merge any entries against the same section. */ 2591 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 2592 { 2593 struct elf32_mb_dyn_relocs *q; 2594 2595 for (q = edir->dyn_relocs; q != NULL; q = q->next) 2596 if (q->sec == p->sec) 2597 { 2598 q->pc_count += p->pc_count; 2599 q->count += p->count; 2600 *pp = p->next; 2601 break; 2602 } 2603 if (q == NULL) 2604 pp = &p->next; 2605 } 2606 *pp = edir->dyn_relocs; 2607 } 2608 2609 edir->dyn_relocs = eind->dyn_relocs; 2610 eind->dyn_relocs = NULL; 2611 } 2612 2613 edir->tls_mask |= eind->tls_mask; 2614 2615 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 2616 } 2617 2618 static bfd_boolean 2619 microblaze_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 2620 struct elf_link_hash_entry *h) 2621 { 2622 struct elf32_mb_link_hash_table *htab; 2623 struct elf32_mb_link_hash_entry * eh; 2624 struct elf32_mb_dyn_relocs *p; 2625 asection *sdynbss, *s; 2626 unsigned int power_of_two; 2627 bfd *dynobj; 2628 2629 htab = elf32_mb_hash_table (info); 2630 if (htab == NULL) 2631 return FALSE; 2632 2633 /* If this is a function, put it in the procedure linkage table. We 2634 will fill in the contents of the procedure linkage table later, 2635 when we know the address of the .got section. */ 2636 if (h->type == STT_FUNC 2637 || h->needs_plt) 2638 { 2639 if (h->plt.refcount <= 0 2640 || SYMBOL_CALLS_LOCAL (info, h) 2641 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 2642 && h->root.type == bfd_link_hash_undefweak)) 2643 { 2644 /* This case can occur if we saw a PLT reloc in an input 2645 file, but the symbol was never referred to by a dynamic 2646 object, or if all references were garbage collected. In 2647 such a case, we don't actually need to build a procedure 2648 linkage table, and we can just do a PC32 reloc instead. */ 2649 h->plt.offset = (bfd_vma) -1; 2650 h->needs_plt = 0; 2651 } 2652 2653 return TRUE; 2654 } 2655 else 2656 /* It's possible that we incorrectly decided a .plt reloc was 2657 needed for an R_MICROBLAZE_64_PCREL reloc to a non-function sym in 2658 check_relocs. We can't decide accurately between function and 2659 non-function syms in check-relocs; Objects loaded later in 2660 the link may change h->type. So fix it now. */ 2661 h->plt.offset = (bfd_vma) -1; 2662 2663 /* If this is a weak symbol, and there is a real definition, the 2664 processor independent code will have arranged for us to see the 2665 real definition first, and we can just use the same value. */ 2666 if (h->u.weakdef != NULL) 2667 { 2668 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 2669 || h->u.weakdef->root.type == bfd_link_hash_defweak); 2670 h->root.u.def.section = h->u.weakdef->root.u.def.section; 2671 h->root.u.def.value = h->u.weakdef->root.u.def.value; 2672 return TRUE; 2673 } 2674 2675 /* This is a reference to a symbol defined by a dynamic object which 2676 is not a function. */ 2677 2678 /* If we are creating a shared library, we must presume that the 2679 only references to the symbol are via the global offset table. 2680 For such cases we need not do anything here; the relocations will 2681 be handled correctly by relocate_section. */ 2682 if (info->shared) 2683 return TRUE; 2684 2685 /* If there are no references to this symbol that do not use the 2686 GOT, we don't need to generate a copy reloc. */ 2687 if (!h->non_got_ref) 2688 return TRUE; 2689 2690 /* If -z nocopyreloc was given, we won't generate them either. */ 2691 if (info->nocopyreloc) 2692 { 2693 h->non_got_ref = 0; 2694 return TRUE; 2695 } 2696 2697 eh = (struct elf32_mb_link_hash_entry *) h; 2698 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2699 { 2700 s = p->sec->output_section; 2701 if (s != NULL && (s->flags & SEC_READONLY) != 0) 2702 break; 2703 } 2704 2705 /* If we didn't find any dynamic relocs in read-only sections, then 2706 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 2707 if (p == NULL) 2708 { 2709 h->non_got_ref = 0; 2710 return TRUE; 2711 } 2712 2713 /* We must allocate the symbol in our .dynbss section, which will 2714 become part of the .bss section of the executable. There will be 2715 an entry for this symbol in the .dynsym section. The dynamic 2716 object will contain position independent code, so all references 2717 from the dynamic object to this symbol will go through the global 2718 offset table. The dynamic linker will use the .dynsym entry to 2719 determine the address it must put in the global offset table, so 2720 both the dynamic object and the regular object will refer to the 2721 same memory location for the variable. */ 2722 2723 /* We must generate a R_MICROBLAZE_COPY reloc to tell the dynamic linker 2724 to copy the initial value out of the dynamic object and into the 2725 runtime process image. */ 2726 dynobj = elf_hash_table (info)->dynobj; 2727 BFD_ASSERT (dynobj != NULL); 2728 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) 2729 { 2730 htab->srelbss->size += sizeof (Elf32_External_Rela); 2731 h->needs_copy = 1; 2732 } 2733 2734 /* We need to figure out the alignment required for this symbol. I 2735 have no idea how ELF linkers handle this. */ 2736 power_of_two = bfd_log2 (h->size); 2737 if (power_of_two > 3) 2738 power_of_two = 3; 2739 2740 sdynbss = htab->sdynbss; 2741 /* Apply the required alignment. */ 2742 sdynbss->size = BFD_ALIGN (sdynbss->size, (bfd_size_type) (1 << power_of_two)); 2743 if (power_of_two > bfd_get_section_alignment (dynobj, sdynbss)) 2744 { 2745 if (! bfd_set_section_alignment (dynobj, sdynbss, power_of_two)) 2746 return FALSE; 2747 } 2748 2749 /* Define the symbol as being at this point in the section. */ 2750 h->root.u.def.section = sdynbss; 2751 h->root.u.def.value = sdynbss->size; 2752 2753 /* Increment the section size to make room for the symbol. */ 2754 sdynbss->size += h->size; 2755 return TRUE; 2756 } 2757 2758 /* Allocate space in .plt, .got and associated reloc sections for 2759 dynamic relocs. */ 2760 2761 static bfd_boolean 2762 allocate_dynrelocs (struct elf_link_hash_entry *h, void * dat) 2763 { 2764 struct bfd_link_info *info; 2765 struct elf32_mb_link_hash_table *htab; 2766 struct elf32_mb_link_hash_entry *eh; 2767 struct elf32_mb_dyn_relocs *p; 2768 2769 if (h->root.type == bfd_link_hash_indirect) 2770 return TRUE; 2771 2772 info = (struct bfd_link_info *) dat; 2773 htab = elf32_mb_hash_table (info); 2774 if (htab == NULL) 2775 return FALSE; 2776 2777 if (htab->elf.dynamic_sections_created 2778 && h->plt.refcount > 0) 2779 { 2780 /* Make sure this symbol is output as a dynamic symbol. 2781 Undefined weak syms won't yet be marked as dynamic. */ 2782 if (h->dynindx == -1 2783 && !h->forced_local) 2784 { 2785 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2786 return FALSE; 2787 } 2788 2789 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h)) 2790 { 2791 asection *s = htab->splt; 2792 2793 /* The first entry in .plt is reserved. */ 2794 if (s->size == 0) 2795 s->size = PLT_ENTRY_SIZE; 2796 2797 h->plt.offset = s->size; 2798 2799 /* If this symbol is not defined in a regular file, and we are 2800 not generating a shared library, then set the symbol to this 2801 location in the .plt. This is required to make function 2802 pointers compare as equal between the normal executable and 2803 the shared library. */ 2804 if (! info->shared 2805 && !h->def_regular) 2806 { 2807 h->root.u.def.section = s; 2808 h->root.u.def.value = h->plt.offset; 2809 } 2810 2811 /* Make room for this entry. */ 2812 s->size += PLT_ENTRY_SIZE; 2813 2814 /* We also need to make an entry in the .got.plt section, which 2815 will be placed in the .got section by the linker script. */ 2816 htab->sgotplt->size += 4; 2817 2818 /* We also need to make an entry in the .rel.plt section. */ 2819 htab->srelplt->size += sizeof (Elf32_External_Rela); 2820 } 2821 else 2822 { 2823 h->plt.offset = (bfd_vma) -1; 2824 h->needs_plt = 0; 2825 } 2826 } 2827 else 2828 { 2829 h->plt.offset = (bfd_vma) -1; 2830 h->needs_plt = 0; 2831 } 2832 2833 eh = (struct elf32_mb_link_hash_entry *) h; 2834 if (h->got.refcount > 0) 2835 { 2836 unsigned int need; 2837 asection *s; 2838 2839 /* Make sure this symbol is output as a dynamic symbol. 2840 Undefined weak syms won't yet be marked as dynamic. */ 2841 if (h->dynindx == -1 2842 && !h->forced_local) 2843 { 2844 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2845 return FALSE; 2846 } 2847 2848 need = 0; 2849 if ((eh->tls_mask & TLS_TLS) != 0) 2850 { 2851 /* Handle TLS Symbol */ 2852 if ((eh->tls_mask & TLS_LD) != 0) 2853 { 2854 if (!eh->elf.def_dynamic) 2855 /* We'll just use htab->tlsld_got.offset. This should 2856 always be the case. It's a little odd if we have 2857 a local dynamic reloc against a non-local symbol. */ 2858 htab->tlsld_got.refcount += 1; 2859 else 2860 need += 8; 2861 } 2862 if ((eh->tls_mask & TLS_GD) != 0) 2863 need += 8; 2864 } 2865 else 2866 { 2867 /* Regular (non-TLS) symbol */ 2868 need += 4; 2869 } 2870 if (need == 0) 2871 { 2872 h->got.offset = (bfd_vma) -1; 2873 } 2874 else 2875 { 2876 s = htab->sgot; 2877 h->got.offset = s->size; 2878 s->size += need; 2879 htab->srelgot->size += need * (sizeof (Elf32_External_Rela) / 4); 2880 } 2881 } 2882 else 2883 h->got.offset = (bfd_vma) -1; 2884 2885 if (eh->dyn_relocs == NULL) 2886 return TRUE; 2887 2888 /* In the shared -Bsymbolic case, discard space allocated for 2889 dynamic pc-relative relocs against symbols which turn out to be 2890 defined in regular objects. For the normal shared case, discard 2891 space for pc-relative relocs that have become local due to symbol 2892 visibility changes. */ 2893 2894 if (info->shared) 2895 { 2896 if (h->def_regular 2897 && (h->forced_local 2898 || info->symbolic)) 2899 { 2900 struct elf32_mb_dyn_relocs **pp; 2901 2902 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 2903 { 2904 p->count -= p->pc_count; 2905 p->pc_count = 0; 2906 if (p->count == 0) 2907 *pp = p->next; 2908 else 2909 pp = &p->next; 2910 } 2911 } 2912 } 2913 else 2914 { 2915 /* For the non-shared case, discard space for relocs against 2916 symbols which turn out to need copy relocs or are not 2917 dynamic. */ 2918 2919 if (!h->non_got_ref 2920 && ((h->def_dynamic 2921 && !h->def_regular) 2922 || (htab->elf.dynamic_sections_created 2923 && (h->root.type == bfd_link_hash_undefweak 2924 || h->root.type == bfd_link_hash_undefined)))) 2925 { 2926 /* Make sure this symbol is output as a dynamic symbol. 2927 Undefined weak syms won't yet be marked as dynamic. */ 2928 if (h->dynindx == -1 2929 && !h->forced_local) 2930 { 2931 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2932 return FALSE; 2933 } 2934 2935 /* If that succeeded, we know we'll be keeping all the 2936 relocs. */ 2937 if (h->dynindx != -1) 2938 goto keep; 2939 } 2940 2941 eh->dyn_relocs = NULL; 2942 2943 keep: ; 2944 } 2945 2946 /* Finally, allocate space. */ 2947 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2948 { 2949 asection *sreloc = elf_section_data (p->sec)->sreloc; 2950 sreloc->size += p->count * sizeof (Elf32_External_Rela); 2951 } 2952 2953 return TRUE; 2954 } 2955 2956 /* Set the sizes of the dynamic sections. */ 2957 2958 static bfd_boolean 2959 microblaze_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 2960 struct bfd_link_info *info) 2961 { 2962 struct elf32_mb_link_hash_table *htab; 2963 bfd *dynobj; 2964 asection *s; 2965 bfd *ibfd; 2966 2967 htab = elf32_mb_hash_table (info); 2968 if (htab == NULL) 2969 return FALSE; 2970 2971 dynobj = htab->elf.dynobj; 2972 BFD_ASSERT (dynobj != NULL); 2973 2974 /* Set up .got offsets for local syms, and space for local dynamic 2975 relocs. */ 2976 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 2977 { 2978 bfd_signed_vma *local_got; 2979 bfd_signed_vma *end_local_got; 2980 bfd_size_type locsymcount; 2981 Elf_Internal_Shdr *symtab_hdr; 2982 unsigned char *lgot_masks; 2983 asection *srel; 2984 2985 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 2986 continue; 2987 2988 for (s = ibfd->sections; s != NULL; s = s->next) 2989 { 2990 struct elf32_mb_dyn_relocs *p; 2991 2992 for (p = ((struct elf32_mb_dyn_relocs *) 2993 elf_section_data (s)->local_dynrel); 2994 p != NULL; 2995 p = p->next) 2996 { 2997 if (!bfd_is_abs_section (p->sec) 2998 && bfd_is_abs_section (p->sec->output_section)) 2999 { 3000 /* Input section has been discarded, either because 3001 it is a copy of a linkonce section or due to 3002 linker script /DISCARD/, so we'll be discarding 3003 the relocs too. */ 3004 } 3005 else if (p->count != 0) 3006 { 3007 srel = elf_section_data (p->sec)->sreloc; 3008 srel->size += p->count * sizeof (Elf32_External_Rela); 3009 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 3010 info->flags |= DF_TEXTREL; 3011 } 3012 } 3013 } 3014 3015 local_got = elf_local_got_refcounts (ibfd); 3016 if (!local_got) 3017 continue; 3018 3019 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 3020 locsymcount = symtab_hdr->sh_info; 3021 end_local_got = local_got + locsymcount; 3022 lgot_masks = (unsigned char *) end_local_got; 3023 s = htab->sgot; 3024 srel = htab->srelgot; 3025 3026 for (; local_got < end_local_got; ++local_got, ++lgot_masks) 3027 { 3028 if (*local_got > 0) 3029 { 3030 unsigned int need = 0; 3031 if ((*lgot_masks & TLS_TLS) != 0) 3032 { 3033 if ((*lgot_masks & TLS_GD) != 0) 3034 need += 8; 3035 if ((*lgot_masks & TLS_LD) != 0) 3036 htab->tlsld_got.refcount += 1; 3037 } 3038 else 3039 need += 4; 3040 3041 if (need == 0) 3042 { 3043 *local_got = (bfd_vma) -1; 3044 } 3045 else 3046 { 3047 *local_got = s->size; 3048 s->size += need; 3049 if (info->shared) 3050 srel->size += need * (sizeof (Elf32_External_Rela) / 4); 3051 } 3052 } 3053 else 3054 *local_got = (bfd_vma) -1; 3055 } 3056 } 3057 3058 /* Allocate global sym .plt and .got entries, and space for global 3059 sym dynamic relocs. */ 3060 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); 3061 3062 if (htab->tlsld_got.refcount > 0) 3063 { 3064 htab->tlsld_got.offset = htab->sgot->size; 3065 htab->sgot->size += 8; 3066 if (info->shared) 3067 htab->srelgot->size += sizeof (Elf32_External_Rela); 3068 } 3069 else 3070 htab->tlsld_got.offset = (bfd_vma) -1; 3071 3072 if (elf_hash_table (info)->dynamic_sections_created) 3073 { 3074 /* Make space for the trailing nop in .plt. */ 3075 if (htab->splt->size > 0) 3076 htab->splt->size += 4; 3077 } 3078 3079 /* The check_relocs and adjust_dynamic_symbol entry points have 3080 determined the sizes of the various dynamic sections. Allocate 3081 memory for them. */ 3082 for (s = dynobj->sections; s != NULL; s = s->next) 3083 { 3084 const char *name; 3085 bfd_boolean strip = FALSE; 3086 3087 if ((s->flags & SEC_LINKER_CREATED) == 0) 3088 continue; 3089 3090 /* It's OK to base decisions on the section name, because none 3091 of the dynobj section names depend upon the input files. */ 3092 name = bfd_get_section_name (dynobj, s); 3093 3094 if (strncmp (name, ".rela", 5) == 0) 3095 { 3096 if (s->size == 0) 3097 { 3098 /* If we don't need this section, strip it from the 3099 output file. This is to handle .rela.bss and 3100 .rela.plt. We must create it in 3101 create_dynamic_sections, because it must be created 3102 before the linker maps input sections to output 3103 sections. The linker does that before 3104 adjust_dynamic_symbol is called, and it is that 3105 function which decides whether anything needs to go 3106 into these sections. */ 3107 strip = TRUE; 3108 } 3109 else 3110 { 3111 /* We use the reloc_count field as a counter if we need 3112 to copy relocs into the output file. */ 3113 s->reloc_count = 0; 3114 } 3115 } 3116 else if (s != htab->splt && s != htab->sgot && s != htab->sgotplt) 3117 { 3118 /* It's not one of our sections, so don't allocate space. */ 3119 continue; 3120 } 3121 3122 if (strip) 3123 { 3124 s->flags |= SEC_EXCLUDE; 3125 continue; 3126 } 3127 3128 /* Allocate memory for the section contents. */ 3129 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. 3130 Unused entries should be reclaimed before the section's contents 3131 are written out, but at the moment this does not happen. Thus in 3132 order to prevent writing out garbage, we initialise the section's 3133 contents to zero. */ 3134 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 3135 if (s->contents == NULL && s->size != 0) 3136 return FALSE; 3137 } 3138 3139 if (elf_hash_table (info)->dynamic_sections_created) 3140 { 3141 /* Add some entries to the .dynamic section. We fill in the 3142 values later, in microblaze_elf_finish_dynamic_sections, but we 3143 must add the entries now so that we get the correct size for 3144 the .dynamic section. The DT_DEBUG entry is filled in by the 3145 dynamic linker and used by the debugger. */ 3146 #define add_dynamic_entry(TAG, VAL) \ 3147 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 3148 3149 if (info->executable) 3150 { 3151 if (!add_dynamic_entry (DT_DEBUG, 0)) 3152 return FALSE; 3153 } 3154 3155 if (!add_dynamic_entry (DT_RELA, 0) 3156 || !add_dynamic_entry (DT_RELASZ, 0) 3157 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 3158 return FALSE; 3159 3160 if (htab->splt->size != 0) 3161 { 3162 if (!add_dynamic_entry (DT_PLTGOT, 0) 3163 || !add_dynamic_entry (DT_PLTRELSZ, 0) 3164 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 3165 || !add_dynamic_entry (DT_JMPREL, 0) 3166 || !add_dynamic_entry (DT_BIND_NOW, 1)) 3167 return FALSE; 3168 } 3169 3170 if (info->flags & DF_TEXTREL) 3171 { 3172 if (!add_dynamic_entry (DT_TEXTREL, 0)) 3173 return FALSE; 3174 } 3175 } 3176 #undef add_dynamic_entry 3177 return TRUE; 3178 } 3179 3180 /* Finish up dynamic symbol handling. We set the contents of various 3181 dynamic sections here. */ 3182 3183 static bfd_boolean 3184 microblaze_elf_finish_dynamic_symbol (bfd *output_bfd, 3185 struct bfd_link_info *info, 3186 struct elf_link_hash_entry *h, 3187 Elf_Internal_Sym *sym) 3188 { 3189 struct elf32_mb_link_hash_table *htab; 3190 struct elf32_mb_link_hash_entry *eh = elf32_mb_hash_entry(h); 3191 3192 htab = elf32_mb_hash_table (info); 3193 if (htab == NULL) 3194 return FALSE; 3195 3196 if (h->plt.offset != (bfd_vma) -1) 3197 { 3198 asection *splt; 3199 asection *srela; 3200 asection *sgotplt; 3201 Elf_Internal_Rela rela; 3202 bfd_byte *loc; 3203 bfd_vma plt_index; 3204 bfd_vma got_offset; 3205 bfd_vma got_addr; 3206 3207 /* This symbol has an entry in the procedure linkage table. Set 3208 it up. */ 3209 BFD_ASSERT (h->dynindx != -1); 3210 3211 splt = htab->splt; 3212 srela = htab->srelplt; 3213 sgotplt = htab->sgotplt; 3214 BFD_ASSERT (splt != NULL && srela != NULL && sgotplt != NULL); 3215 3216 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; /* first entry reserved. */ 3217 got_offset = (plt_index + 3) * 4; /* 3 reserved ??? */ 3218 got_addr = got_offset; 3219 3220 /* For non-PIC objects we need absolute address of the GOT entry. */ 3221 if (!info->shared) 3222 got_addr += htab->sgotplt->output_section->vma + sgotplt->output_offset; 3223 3224 /* Fill in the entry in the procedure linkage table. */ 3225 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_0 + ((got_addr >> 16) & 0xffff), 3226 splt->contents + h->plt.offset); 3227 if (info->shared) 3228 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1 + (got_addr & 0xffff), 3229 splt->contents + h->plt.offset + 4); 3230 else 3231 bfd_put_32 (output_bfd, PLT_ENTRY_WORD_1_NOPIC + (got_addr & 0xffff), 3232 splt->contents + h->plt.offset + 4); 3233 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_2, 3234 splt->contents + h->plt.offset + 8); 3235 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD_3, 3236 splt->contents + h->plt.offset + 12); 3237 3238 /* Any additions to the .got section??? */ 3239 /* bfd_put_32 (output_bfd, 3240 splt->output_section->vma + splt->output_offset + h->plt.offset + 4, 3241 sgotplt->contents + got_offset); */ 3242 3243 /* Fill in the entry in the .rela.plt section. */ 3244 rela.r_offset = (sgotplt->output_section->vma 3245 + sgotplt->output_offset 3246 + got_offset); 3247 rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_JUMP_SLOT); 3248 rela.r_addend = 0; 3249 loc = srela->contents; 3250 loc += plt_index * sizeof (Elf32_External_Rela); 3251 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3252 3253 if (!h->def_regular) 3254 { 3255 /* Mark the symbol as undefined, rather than as defined in 3256 the .plt section. Zero the value. */ 3257 sym->st_shndx = SHN_UNDEF; 3258 sym->st_value = 0; 3259 } 3260 } 3261 3262 /* h->got.refcount to be checked ? */ 3263 if (h->got.offset != (bfd_vma) -1 && 3264 ! ((h->got.offset & 1) || 3265 IS_TLS_LD(eh->tls_mask) || IS_TLS_GD(eh->tls_mask))) 3266 { 3267 asection *sgot; 3268 asection *srela; 3269 bfd_vma offset; 3270 3271 /* This symbol has an entry in the global offset table. Set it 3272 up. */ 3273 3274 sgot = htab->sgot; 3275 srela = htab->srelgot; 3276 BFD_ASSERT (sgot != NULL && srela != NULL); 3277 3278 offset = (sgot->output_section->vma + sgot->output_offset 3279 + (h->got.offset &~ (bfd_vma) 1)); 3280 3281 /* If this is a -Bsymbolic link, and the symbol is defined 3282 locally, we just want to emit a RELATIVE reloc. Likewise if 3283 the symbol was forced to be local because of a version file. 3284 The entry in the global offset table will already have been 3285 initialized in the relocate_section function. */ 3286 if (info->shared 3287 && (info->symbolic || h->dynindx == -1) 3288 && h->def_regular) 3289 { 3290 asection *sec = h->root.u.def.section; 3291 microblaze_elf_output_dynamic_relocation (output_bfd, 3292 srela, srela->reloc_count++, 3293 /* symindex= */ 0, 3294 R_MICROBLAZE_REL, offset, 3295 h->root.u.def.value 3296 + sec->output_section->vma 3297 + sec->output_offset); 3298 } 3299 else 3300 { 3301 microblaze_elf_output_dynamic_relocation (output_bfd, 3302 srela, srela->reloc_count++, 3303 h->dynindx, 3304 R_MICROBLAZE_GLOB_DAT, 3305 offset, 0); 3306 } 3307 3308 bfd_put_32 (output_bfd, (bfd_vma) 0, 3309 sgot->contents + (h->got.offset &~ (bfd_vma) 1)); 3310 } 3311 3312 if (h->needs_copy) 3313 { 3314 asection *s; 3315 Elf_Internal_Rela rela; 3316 bfd_byte *loc; 3317 3318 /* This symbols needs a copy reloc. Set it up. */ 3319 3320 BFD_ASSERT (h->dynindx != -1); 3321 3322 s = bfd_get_linker_section (htab->elf.dynobj, ".rela.bss"); 3323 BFD_ASSERT (s != NULL); 3324 3325 rela.r_offset = (h->root.u.def.value 3326 + h->root.u.def.section->output_section->vma 3327 + h->root.u.def.section->output_offset); 3328 rela.r_info = ELF32_R_INFO (h->dynindx, R_MICROBLAZE_COPY); 3329 rela.r_addend = 0; 3330 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 3331 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3332 } 3333 3334 /* Mark some specially defined symbols as absolute. */ 3335 if (h == htab->elf.hdynamic 3336 || h == htab->elf.hgot 3337 || h == htab->elf.hplt) 3338 sym->st_shndx = SHN_ABS; 3339 3340 return TRUE; 3341 } 3342 3343 3344 /* Finish up the dynamic sections. */ 3345 3346 static bfd_boolean 3347 microblaze_elf_finish_dynamic_sections (bfd *output_bfd, 3348 struct bfd_link_info *info) 3349 { 3350 bfd *dynobj; 3351 asection *sdyn, *sgot; 3352 struct elf32_mb_link_hash_table *htab; 3353 3354 htab = elf32_mb_hash_table (info); 3355 if (htab == NULL) 3356 return FALSE; 3357 3358 dynobj = htab->elf.dynobj; 3359 3360 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 3361 3362 if (htab->elf.dynamic_sections_created) 3363 { 3364 asection *splt; 3365 Elf32_External_Dyn *dyncon, *dynconend; 3366 3367 splt = bfd_get_linker_section (dynobj, ".plt"); 3368 BFD_ASSERT (splt != NULL && sdyn != NULL); 3369 3370 dyncon = (Elf32_External_Dyn *) sdyn->contents; 3371 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 3372 for (; dyncon < dynconend; dyncon++) 3373 { 3374 Elf_Internal_Dyn dyn; 3375 const char *name; 3376 bfd_boolean size; 3377 3378 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 3379 3380 switch (dyn.d_tag) 3381 { 3382 case DT_PLTGOT: name = ".got.plt"; size = FALSE; break; 3383 case DT_PLTRELSZ: name = ".rela.plt"; size = TRUE; break; 3384 case DT_JMPREL: name = ".rela.plt"; size = FALSE; break; 3385 case DT_RELA: name = ".rela.dyn"; size = FALSE; break; 3386 case DT_RELASZ: name = ".rela.dyn"; size = TRUE; break; 3387 default: name = NULL; size = FALSE; break; 3388 } 3389 3390 if (name != NULL) 3391 { 3392 asection *s; 3393 3394 s = bfd_get_section_by_name (output_bfd, name); 3395 if (s == NULL) 3396 dyn.d_un.d_val = 0; 3397 else 3398 { 3399 if (! size) 3400 dyn.d_un.d_ptr = s->vma; 3401 else 3402 dyn.d_un.d_val = s->size; 3403 } 3404 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3405 } 3406 } 3407 3408 /* Clear the first entry in the procedure linkage table, 3409 and put a nop in the last four bytes. */ 3410 if (splt->size > 0) 3411 { 3412 memset (splt->contents, 0, PLT_ENTRY_SIZE); 3413 bfd_put_32 (output_bfd, (bfd_vma) 0x80000000 /* nop. */, 3414 splt->contents + splt->size - 4); 3415 } 3416 3417 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; 3418 } 3419 3420 /* Set the first entry in the global offset table to the address of 3421 the dynamic section. */ 3422 sgot = bfd_get_linker_section (dynobj, ".got.plt"); 3423 if (sgot && sgot->size > 0) 3424 { 3425 if (sdyn == NULL) 3426 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 3427 else 3428 bfd_put_32 (output_bfd, 3429 sdyn->output_section->vma + sdyn->output_offset, 3430 sgot->contents); 3431 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 3432 } 3433 3434 if (htab->sgot && htab->sgot->size > 0) 3435 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4; 3436 3437 return TRUE; 3438 } 3439 3440 /* Hook called by the linker routine which adds symbols from an object 3441 file. We use it to put .comm items in .sbss, and not .bss. */ 3442 3443 static bfd_boolean 3444 microblaze_elf_add_symbol_hook (bfd *abfd, 3445 struct bfd_link_info *info, 3446 Elf_Internal_Sym *sym, 3447 const char **namep ATTRIBUTE_UNUSED, 3448 flagword *flagsp ATTRIBUTE_UNUSED, 3449 asection **secp, 3450 bfd_vma *valp) 3451 { 3452 if (sym->st_shndx == SHN_COMMON 3453 && !info->relocatable 3454 && sym->st_size <= elf_gp_size (abfd)) 3455 { 3456 /* Common symbols less than or equal to -G nn bytes are automatically 3457 put into .sbss. */ 3458 *secp = bfd_make_section_old_way (abfd, ".sbss"); 3459 if (*secp == NULL 3460 || ! bfd_set_section_flags (abfd, *secp, SEC_IS_COMMON)) 3461 return FALSE; 3462 3463 *valp = sym->st_size; 3464 } 3465 3466 return TRUE; 3467 } 3468 3469 #define TARGET_LITTLE_SYM bfd_elf32_microblazeel_vec 3470 #define TARGET_LITTLE_NAME "elf32-microblazeel" 3471 3472 #define TARGET_BIG_SYM bfd_elf32_microblaze_vec 3473 #define TARGET_BIG_NAME "elf32-microblaze" 3474 3475 #define ELF_ARCH bfd_arch_microblaze 3476 #define ELF_TARGET_ID MICROBLAZE_ELF_DATA 3477 #define ELF_MACHINE_CODE EM_MICROBLAZE 3478 #define ELF_MACHINE_ALT1 EM_MICROBLAZE_OLD 3479 #define ELF_MAXPAGESIZE 0x1000 3480 #define elf_info_to_howto microblaze_elf_info_to_howto 3481 #define elf_info_to_howto_rel NULL 3482 3483 #define bfd_elf32_bfd_reloc_type_lookup microblaze_elf_reloc_type_lookup 3484 #define bfd_elf32_bfd_is_local_label_name microblaze_elf_is_local_label_name 3485 #define elf_backend_relocate_section microblaze_elf_relocate_section 3486 #define bfd_elf32_bfd_relax_section microblaze_elf_relax_section 3487 #define bfd_elf32_bfd_merge_private_bfd_data microblaze_elf_merge_private_bfd_data 3488 #define bfd_elf32_bfd_reloc_name_lookup microblaze_elf_reloc_name_lookup 3489 3490 #define elf_backend_gc_mark_hook microblaze_elf_gc_mark_hook 3491 #define elf_backend_gc_sweep_hook microblaze_elf_gc_sweep_hook 3492 #define elf_backend_check_relocs microblaze_elf_check_relocs 3493 #define elf_backend_copy_indirect_symbol microblaze_elf_copy_indirect_symbol 3494 #define bfd_elf32_bfd_link_hash_table_create microblaze_elf_link_hash_table_create 3495 #define elf_backend_can_gc_sections 1 3496 #define elf_backend_can_refcount 1 3497 #define elf_backend_want_got_plt 1 3498 #define elf_backend_plt_readonly 1 3499 #define elf_backend_got_header_size 12 3500 #define elf_backend_rela_normal 1 3501 3502 #define elf_backend_adjust_dynamic_symbol microblaze_elf_adjust_dynamic_symbol 3503 #define elf_backend_create_dynamic_sections microblaze_elf_create_dynamic_sections 3504 #define elf_backend_finish_dynamic_sections microblaze_elf_finish_dynamic_sections 3505 #define elf_backend_finish_dynamic_symbol microblaze_elf_finish_dynamic_symbol 3506 #define elf_backend_size_dynamic_sections microblaze_elf_size_dynamic_sections 3507 #define elf_backend_add_symbol_hook microblaze_elf_add_symbol_hook 3508 3509 #include "elf32-target.h" 3510