1 /* ADI Blackfin BFD support for 32-bit ELF. 2 Copyright (C) 2005-2020 Free Software Foundation, Inc. 3 4 This file is part of BFD, the Binary File Descriptor library. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 19 MA 02110-1301, USA. */ 20 21 #include "sysdep.h" 22 #include "bfd.h" 23 #include "libbfd.h" 24 #include "elf-bfd.h" 25 #include "elf/bfin.h" 26 #include "dwarf2.h" 27 #include "hashtab.h" 28 #include "elf32-bfin.h" 29 30 /* FUNCTION : bfin_pltpc_reloc 31 ABSTRACT : TODO : figure out how to handle pltpc relocs. */ 32 static bfd_reloc_status_type 33 bfin_pltpc_reloc ( 34 bfd *abfd ATTRIBUTE_UNUSED, 35 arelent *reloc_entry ATTRIBUTE_UNUSED, 36 asymbol *symbol ATTRIBUTE_UNUSED, 37 void * data ATTRIBUTE_UNUSED, 38 asection *input_section ATTRIBUTE_UNUSED, 39 bfd *output_bfd ATTRIBUTE_UNUSED, 40 char **error_message ATTRIBUTE_UNUSED) 41 { 42 bfd_reloc_status_type flag = bfd_reloc_ok; 43 return flag; 44 } 45 46 47 static bfd_reloc_status_type 48 bfin_pcrel24_reloc (bfd *abfd, 49 arelent *reloc_entry, 50 asymbol *symbol, 51 void * data, 52 asection *input_section, 53 bfd *output_bfd, 54 char **error_message ATTRIBUTE_UNUSED) 55 { 56 bfd_vma relocation; 57 bfd_size_type addr = reloc_entry->address; 58 bfd_vma output_base = 0; 59 reloc_howto_type *howto = reloc_entry->howto; 60 asection *output_section; 61 bfd_boolean relocatable = (output_bfd != NULL); 62 63 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 64 return bfd_reloc_outofrange; 65 66 if (bfd_is_und_section (symbol->section) 67 && (symbol->flags & BSF_WEAK) == 0 68 && !relocatable) 69 return bfd_reloc_undefined; 70 71 if (bfd_is_com_section (symbol->section)) 72 relocation = 0; 73 else 74 relocation = symbol->value; 75 76 output_section = symbol->section->output_section; 77 78 if (relocatable) 79 output_base = 0; 80 else 81 output_base = output_section->vma; 82 83 if (!relocatable || !strcmp (symbol->name, symbol->section->name)) 84 relocation += output_base + symbol->section->output_offset; 85 86 if (!relocatable && !strcmp (symbol->name, symbol->section->name)) 87 relocation += reloc_entry->addend; 88 89 relocation -= input_section->output_section->vma + input_section->output_offset; 90 relocation -= reloc_entry->address; 91 92 if (howto->complain_on_overflow != complain_overflow_dont) 93 { 94 bfd_reloc_status_type status; 95 status = bfd_check_overflow (howto->complain_on_overflow, 96 howto->bitsize, 97 howto->rightshift, 98 bfd_arch_bits_per_address(abfd), 99 relocation); 100 if (status != bfd_reloc_ok) 101 return status; 102 } 103 104 /* if rightshift is 1 and the number odd, return error. */ 105 if (howto->rightshift && (relocation & 0x01)) 106 { 107 _bfd_error_handler (_("relocation should be even number")); 108 return bfd_reloc_overflow; 109 } 110 111 relocation >>= (bfd_vma) howto->rightshift; 112 /* Shift everything up to where it's going to be used. */ 113 114 relocation <<= (bfd_vma) howto->bitpos; 115 116 if (relocatable) 117 { 118 reloc_entry->address += input_section->output_offset; 119 reloc_entry->addend += symbol->section->output_offset; 120 } 121 122 { 123 short x; 124 125 /* We are getting reloc_entry->address 2 byte off from 126 the start of instruction. Assuming absolute postion 127 of the reloc data. But, following code had been written assuming 128 reloc address is starting at begining of instruction. 129 To compensate that I have increased the value of 130 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */ 131 132 relocation += 1; 133 x = bfd_get_16 (abfd, (bfd_byte *) data + addr - 2); 134 x = (x & 0xff00) | ((relocation >> 16) & 0xff); 135 bfd_put_16 (abfd, x, (unsigned char *) data + addr - 2); 136 137 x = bfd_get_16 (abfd, (bfd_byte *) data + addr); 138 x = relocation & 0xFFFF; 139 bfd_put_16 (abfd, x, (unsigned char *) data + addr ); 140 } 141 return bfd_reloc_ok; 142 } 143 144 static bfd_reloc_status_type 145 bfin_imm16_reloc (bfd *abfd, 146 arelent *reloc_entry, 147 asymbol *symbol, 148 void * data, 149 asection *input_section, 150 bfd *output_bfd, 151 char **error_message ATTRIBUTE_UNUSED) 152 { 153 bfd_vma relocation, x; 154 bfd_size_type reloc_addr = reloc_entry->address; 155 bfd_vma output_base = 0; 156 reloc_howto_type *howto = reloc_entry->howto; 157 asection *output_section; 158 bfd_boolean relocatable = (output_bfd != NULL); 159 160 /* Is the address of the relocation really within the section? */ 161 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 162 return bfd_reloc_outofrange; 163 164 if (bfd_is_und_section (symbol->section) 165 && (symbol->flags & BSF_WEAK) == 0 166 && !relocatable) 167 return bfd_reloc_undefined; 168 169 output_section = symbol->section->output_section; 170 relocation = symbol->value; 171 172 /* Convert input-section-relative symbol value to absolute. */ 173 if (relocatable) 174 output_base = 0; 175 else 176 output_base = output_section->vma; 177 178 if (!relocatable || !strcmp (symbol->name, symbol->section->name)) 179 relocation += output_base + symbol->section->output_offset; 180 181 /* Add in supplied addend. */ 182 relocation += reloc_entry->addend; 183 184 if (relocatable) 185 { 186 reloc_entry->address += input_section->output_offset; 187 reloc_entry->addend += symbol->section->output_offset; 188 } 189 else 190 { 191 reloc_entry->addend = 0; 192 } 193 194 if (howto->complain_on_overflow != complain_overflow_dont) 195 { 196 bfd_reloc_status_type flag; 197 flag = bfd_check_overflow (howto->complain_on_overflow, 198 howto->bitsize, 199 howto->rightshift, 200 bfd_arch_bits_per_address(abfd), 201 relocation); 202 if (flag != bfd_reloc_ok) 203 return flag; 204 } 205 206 /* Here the variable relocation holds the final address of the 207 symbol we are relocating against, plus any addend. */ 208 209 relocation >>= (bfd_vma) howto->rightshift; 210 x = relocation; 211 bfd_put_16 (abfd, x, (unsigned char *) data + reloc_addr); 212 return bfd_reloc_ok; 213 } 214 215 216 static bfd_reloc_status_type 217 bfin_byte4_reloc (bfd *abfd, 218 arelent *reloc_entry, 219 asymbol *symbol, 220 void * data, 221 asection *input_section, 222 bfd *output_bfd, 223 char **error_message ATTRIBUTE_UNUSED) 224 { 225 bfd_vma relocation, x; 226 bfd_size_type addr = reloc_entry->address; 227 bfd_vma output_base = 0; 228 asection *output_section; 229 bfd_boolean relocatable = (output_bfd != NULL); 230 231 /* Is the address of the relocation really within the section? */ 232 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 233 return bfd_reloc_outofrange; 234 235 if (bfd_is_und_section (symbol->section) 236 && (symbol->flags & BSF_WEAK) == 0 237 && !relocatable) 238 return bfd_reloc_undefined; 239 240 output_section = symbol->section->output_section; 241 relocation = symbol->value; 242 /* Convert input-section-relative symbol value to absolute. */ 243 if (relocatable) 244 output_base = 0; 245 else 246 output_base = output_section->vma; 247 248 if ((symbol->name 249 && symbol->section->name 250 && !strcmp (symbol->name, symbol->section->name)) 251 || !relocatable) 252 { 253 relocation += output_base + symbol->section->output_offset; 254 } 255 256 relocation += reloc_entry->addend; 257 258 if (relocatable) 259 { 260 /* This output will be relocatable ... like ld -r. */ 261 reloc_entry->address += input_section->output_offset; 262 reloc_entry->addend += symbol->section->output_offset; 263 } 264 else 265 { 266 reloc_entry->addend = 0; 267 } 268 269 /* Here the variable relocation holds the final address of the 270 symbol we are relocating against, plus any addend. */ 271 x = relocation & 0xFFFF0000; 272 x >>=16; 273 bfd_put_16 (abfd, x, (unsigned char *) data + addr + 2); 274 275 x = relocation & 0x0000FFFF; 276 bfd_put_16 (abfd, x, (unsigned char *) data + addr); 277 return bfd_reloc_ok; 278 } 279 280 /* bfin_bfd_reloc handles the blackfin arithmetic relocations. 281 Use this instead of bfd_perform_relocation. */ 282 static bfd_reloc_status_type 283 bfin_bfd_reloc (bfd *abfd, 284 arelent *reloc_entry, 285 asymbol *symbol, 286 void * data, 287 asection *input_section, 288 bfd *output_bfd, 289 char **error_message ATTRIBUTE_UNUSED) 290 { 291 bfd_vma relocation; 292 bfd_size_type addr = reloc_entry->address; 293 bfd_vma output_base = 0; 294 reloc_howto_type *howto = reloc_entry->howto; 295 asection *output_section; 296 bfd_boolean relocatable = (output_bfd != NULL); 297 298 /* Is the address of the relocation really within the section? */ 299 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 300 return bfd_reloc_outofrange; 301 302 if (bfd_is_und_section (symbol->section) 303 && (symbol->flags & BSF_WEAK) == 0 304 && !relocatable) 305 return bfd_reloc_undefined; 306 307 /* Get symbol value. (Common symbols are special.) */ 308 if (bfd_is_com_section (symbol->section)) 309 relocation = 0; 310 else 311 relocation = symbol->value; 312 313 output_section = symbol->section->output_section; 314 315 /* Convert input-section-relative symbol value to absolute. */ 316 if (relocatable) 317 output_base = 0; 318 else 319 output_base = output_section->vma; 320 321 if (!relocatable || !strcmp (symbol->name, symbol->section->name)) 322 relocation += output_base + symbol->section->output_offset; 323 324 if (!relocatable && !strcmp (symbol->name, symbol->section->name)) 325 { 326 /* Add in supplied addend. */ 327 relocation += reloc_entry->addend; 328 } 329 330 /* Here the variable relocation holds the final address of the 331 symbol we are relocating against, plus any addend. */ 332 333 if (howto->pc_relative) 334 { 335 relocation -= input_section->output_section->vma + input_section->output_offset; 336 337 if (howto->pcrel_offset) 338 relocation -= reloc_entry->address; 339 } 340 341 if (relocatable) 342 { 343 reloc_entry->address += input_section->output_offset; 344 reloc_entry->addend += symbol->section->output_offset; 345 } 346 347 if (howto->complain_on_overflow != complain_overflow_dont) 348 { 349 bfd_reloc_status_type status; 350 351 status = bfd_check_overflow (howto->complain_on_overflow, 352 howto->bitsize, 353 howto->rightshift, 354 bfd_arch_bits_per_address(abfd), 355 relocation); 356 if (status != bfd_reloc_ok) 357 return status; 358 } 359 360 /* If rightshift is 1 and the number odd, return error. */ 361 if (howto->rightshift && (relocation & 0x01)) 362 { 363 _bfd_error_handler (_("relocation should be even number")); 364 return bfd_reloc_overflow; 365 } 366 367 relocation >>= (bfd_vma) howto->rightshift; 368 369 /* Shift everything up to where it's going to be used. */ 370 371 relocation <<= (bfd_vma) howto->bitpos; 372 373 #define DOIT(x) \ 374 x = ( (x & ~howto->dst_mask) | (relocation & howto->dst_mask)) 375 376 /* handle 8 and 16 bit relocations here. */ 377 switch (howto->size) 378 { 379 case 0: 380 { 381 char x = bfd_get_8 (abfd, (char *) data + addr); 382 DOIT (x); 383 bfd_put_8 (abfd, x, (unsigned char *) data + addr); 384 } 385 break; 386 387 case 1: 388 { 389 unsigned short x = bfd_get_16 (abfd, (bfd_byte *) data + addr); 390 DOIT (x); 391 bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data + addr); 392 } 393 break; 394 395 default: 396 return bfd_reloc_other; 397 } 398 399 return bfd_reloc_ok; 400 } 401 402 /* HOWTO Table for blackfin. 403 Blackfin relocations are fairly complicated. 404 Some of the salient features are 405 a. Even numbered offsets. A number of (not all) relocations are 406 even numbered. This means that the rightmost bit is not stored. 407 Needs to right shift by 1 and check to see if value is not odd 408 b. A relocation can be an expression. An expression takes on 409 a variety of relocations arranged in a stack. 410 As a result, we cannot use the standard generic function as special 411 function. We will have our own, which is very similar to the standard 412 generic function except that it understands how to get the value from 413 the relocation stack. . */ 414 415 #define BFIN_RELOC_MIN 0 416 #define BFIN_RELOC_MAX 0x21 417 #define BFIN_GNUEXT_RELOC_MIN 0x40 418 #define BFIN_GNUEXT_RELOC_MAX 0x43 419 #define BFIN_ARELOC_MIN 0xE0 420 #define BFIN_ARELOC_MAX 0xF3 421 422 static reloc_howto_type bfin_howto_table [] = 423 { 424 /* This reloc does nothing. . */ 425 HOWTO (R_BFIN_UNUSED0, /* type. */ 426 0, /* rightshift. */ 427 3, /* size (0 = byte, 1 = short, 2 = long). */ 428 0, /* bitsize. */ 429 FALSE, /* pc_relative. */ 430 0, /* bitpos. */ 431 complain_overflow_dont, /* complain_on_overflow. */ 432 bfd_elf_generic_reloc, /* special_function. */ 433 "R_BFIN_UNUSED0", /* name. */ 434 FALSE, /* partial_inplace. */ 435 0, /* src_mask. */ 436 0, /* dst_mask. */ 437 FALSE), /* pcrel_offset. */ 438 439 HOWTO (R_BFIN_PCREL5M2, /* type. */ 440 1, /* rightshift. */ 441 1, /* size (0 = byte, 1 = short, 2 = long).. */ 442 4, /* bitsize. */ 443 TRUE, /* pc_relative. */ 444 0, /* bitpos. */ 445 complain_overflow_unsigned, /* complain_on_overflow. */ 446 bfin_bfd_reloc, /* special_function. */ 447 "R_BFIN_PCREL5M2", /* name. */ 448 FALSE, /* partial_inplace. */ 449 0, /* src_mask. */ 450 0x0000000F, /* dst_mask. */ 451 FALSE), /* pcrel_offset. */ 452 453 HOWTO (R_BFIN_UNUSED1, /* type. */ 454 0, /* rightshift. */ 455 3, /* size (0 = byte, 1 = short, 2 = long). */ 456 0, /* bitsize. */ 457 FALSE, /* pc_relative. */ 458 0, /* bitpos. */ 459 complain_overflow_dont, /* complain_on_overflow. */ 460 bfd_elf_generic_reloc, /* special_function. */ 461 "R_BFIN_UNUSED1", /* name. */ 462 FALSE, /* partial_inplace. */ 463 0, /* src_mask. */ 464 0, /* dst_mask. */ 465 FALSE), /* pcrel_offset. */ 466 467 HOWTO (R_BFIN_PCREL10, /* type. */ 468 1, /* rightshift. */ 469 1, /* size (0 = byte, 1 = short, 2 = long). */ 470 10, /* bitsize. */ 471 TRUE, /* pc_relative. */ 472 0, /* bitpos. */ 473 complain_overflow_signed, /* complain_on_overflow. */ 474 bfin_bfd_reloc, /* special_function. */ 475 "R_BFIN_PCREL10", /* name. */ 476 FALSE, /* partial_inplace. */ 477 0, /* src_mask. */ 478 0x000003FF, /* dst_mask. */ 479 TRUE), /* pcrel_offset. */ 480 481 HOWTO (R_BFIN_PCREL12_JUMP, /* type. */ 482 1, /* rightshift. */ 483 /* the offset is actually 13 bit 484 aligned on a word boundary so 485 only 12 bits have to be used. 486 Right shift the rightmost bit.. */ 487 1, /* size (0 = byte, 1 = short, 2 = long). */ 488 12, /* bitsize. */ 489 TRUE, /* pc_relative. */ 490 0, /* bitpos. */ 491 complain_overflow_signed, /* complain_on_overflow. */ 492 bfin_bfd_reloc, /* special_function. */ 493 "R_BFIN_PCREL12_JUMP", /* name. */ 494 FALSE, /* partial_inplace. */ 495 0, /* src_mask. */ 496 0x0FFF, /* dst_mask. */ 497 TRUE), /* pcrel_offset. */ 498 499 HOWTO (R_BFIN_RIMM16, /* type. */ 500 0, /* rightshift. */ 501 1, /* size (0 = byte, 1 = short, 2 = long). */ 502 16, /* bitsize. */ 503 FALSE, /* pc_relative. */ 504 0, /* bitpos. */ 505 complain_overflow_signed, /* complain_on_overflow. */ 506 bfin_imm16_reloc, /* special_function. */ 507 "R_BFIN_RIMM16", /* name. */ 508 FALSE, /* partial_inplace. */ 509 0, /* src_mask. */ 510 0x0000FFFF, /* dst_mask. */ 511 TRUE), /* pcrel_offset. */ 512 513 HOWTO (R_BFIN_LUIMM16, /* type. */ 514 0, /* rightshift. */ 515 1, /* size (0 = byte, 1 = short, 2 = long). */ 516 16, /* bitsize. */ 517 FALSE, /* pc_relative. */ 518 0, /* bitpos. */ 519 complain_overflow_dont, /* complain_on_overflow. */ 520 bfin_imm16_reloc, /* special_function. */ 521 "R_BFIN_LUIMM16", /* name. */ 522 FALSE, /* partial_inplace. */ 523 0, /* src_mask. */ 524 0x0000FFFF, /* dst_mask. */ 525 TRUE), /* pcrel_offset. */ 526 527 HOWTO (R_BFIN_HUIMM16, /* type. */ 528 16, /* rightshift. */ 529 1, /* size (0 = byte, 1 = short, 2 = long). */ 530 16, /* bitsize. */ 531 FALSE, /* pc_relative. */ 532 0, /* bitpos. */ 533 complain_overflow_unsigned, /* complain_on_overflow. */ 534 bfin_imm16_reloc, /* special_function. */ 535 "R_BFIN_HUIMM16", /* name. */ 536 FALSE, /* partial_inplace. */ 537 0, /* src_mask. */ 538 0x0000FFFF, /* dst_mask. */ 539 TRUE), /* pcrel_offset. */ 540 541 HOWTO (R_BFIN_PCREL12_JUMP_S, /* type. */ 542 1, /* rightshift. */ 543 1, /* size (0 = byte, 1 = short, 2 = long). */ 544 12, /* bitsize. */ 545 TRUE, /* pc_relative. */ 546 0, /* bitpos. */ 547 complain_overflow_signed, /* complain_on_overflow. */ 548 bfin_bfd_reloc, /* special_function. */ 549 "R_BFIN_PCREL12_JUMP_S", /* name. */ 550 FALSE, /* partial_inplace. */ 551 0, /* src_mask. */ 552 0x00000FFF, /* dst_mask. */ 553 TRUE), /* pcrel_offset. */ 554 555 HOWTO (R_BFIN_PCREL24_JUMP_X, /* type. */ 556 1, /* rightshift. */ 557 2, /* size (0 = byte, 1 = short, 2 = long). */ 558 24, /* bitsize. */ 559 TRUE, /* pc_relative. */ 560 0, /* bitpos. */ 561 complain_overflow_signed, /* complain_on_overflow. */ 562 bfin_pcrel24_reloc, /* special_function. */ 563 "R_BFIN_PCREL24_JUMP_X", /* name. */ 564 FALSE, /* partial_inplace. */ 565 0, /* src_mask. */ 566 0x00FFFFFF, /* dst_mask. */ 567 TRUE), /* pcrel_offset. */ 568 569 HOWTO (R_BFIN_PCREL24, /* type. */ 570 1, /* rightshift. */ 571 2, /* size (0 = byte, 1 = short, 2 = long). */ 572 24, /* bitsize. */ 573 TRUE, /* pc_relative. */ 574 0, /* bitpos. */ 575 complain_overflow_signed, /* complain_on_overflow. */ 576 bfin_pcrel24_reloc, /* special_function. */ 577 "R_BFIN_PCREL24", /* name. */ 578 FALSE, /* partial_inplace. */ 579 0, /* src_mask. */ 580 0x00FFFFFF, /* dst_mask. */ 581 TRUE), /* pcrel_offset. */ 582 583 HOWTO (R_BFIN_UNUSEDB, /* type. */ 584 0, /* rightshift. */ 585 3, /* size (0 = byte, 1 = short, 2 = long). */ 586 0, /* bitsize. */ 587 FALSE, /* pc_relative. */ 588 0, /* bitpos. */ 589 complain_overflow_dont, /* complain_on_overflow. */ 590 bfd_elf_generic_reloc, /* special_function. */ 591 "R_BFIN_UNUSEDB", /* name. */ 592 FALSE, /* partial_inplace. */ 593 0, /* src_mask. */ 594 0, /* dst_mask. */ 595 FALSE), /* pcrel_offset. */ 596 597 HOWTO (R_BFIN_UNUSEDC, /* type. */ 598 0, /* rightshift. */ 599 3, /* size (0 = byte, 1 = short, 2 = long). */ 600 0, /* bitsize. */ 601 FALSE, /* pc_relative. */ 602 0, /* bitpos. */ 603 complain_overflow_dont, /* complain_on_overflow. */ 604 bfd_elf_generic_reloc, /* special_function. */ 605 "R_BFIN_UNUSEDC", /* name. */ 606 FALSE, /* partial_inplace. */ 607 0, /* src_mask. */ 608 0, /* dst_mask. */ 609 FALSE), /* pcrel_offset. */ 610 611 HOWTO (R_BFIN_PCREL24_JUMP_L, /* type. */ 612 1, /* rightshift. */ 613 2, /* size (0 = byte, 1 = short, 2 = long). */ 614 24, /* bitsize. */ 615 TRUE, /* pc_relative. */ 616 0, /* bitpos. */ 617 complain_overflow_signed, /* complain_on_overflow. */ 618 bfin_pcrel24_reloc, /* special_function. */ 619 "R_BFIN_PCREL24_JUMP_L", /* name. */ 620 FALSE, /* partial_inplace. */ 621 0, /* src_mask. */ 622 0x00FFFFFF, /* dst_mask. */ 623 TRUE), /* pcrel_offset. */ 624 625 HOWTO (R_BFIN_PCREL24_CALL_X, /* type. */ 626 1, /* rightshift. */ 627 2, /* size (0 = byte, 1 = short, 2 = long). */ 628 24, /* bitsize. */ 629 TRUE, /* pc_relative. */ 630 0, /* bitpos. */ 631 complain_overflow_signed, /* complain_on_overflow. */ 632 bfin_pcrel24_reloc, /* special_function. */ 633 "R_BFIN_PCREL24_CALL_X", /* name. */ 634 FALSE, /* partial_inplace. */ 635 0, /* src_mask. */ 636 0x00FFFFFF, /* dst_mask. */ 637 TRUE), /* pcrel_offset. */ 638 639 HOWTO (R_BFIN_VAR_EQ_SYMB, /* type. */ 640 0, /* rightshift. */ 641 2, /* size (0 = byte, 1 = short, 2 = long). */ 642 32, /* bitsize. */ 643 FALSE, /* pc_relative. */ 644 0, /* bitpos. */ 645 complain_overflow_bitfield, /* complain_on_overflow. */ 646 bfin_bfd_reloc, /* special_function. */ 647 "R_BFIN_VAR_EQ_SYMB", /* name. */ 648 FALSE, /* partial_inplace. */ 649 0, /* src_mask. */ 650 0, /* dst_mask. */ 651 FALSE), /* pcrel_offset. */ 652 653 HOWTO (R_BFIN_BYTE_DATA, /* type. */ 654 0, /* rightshift. */ 655 0, /* size (0 = byte, 1 = short, 2 = long). */ 656 8, /* bitsize. */ 657 FALSE, /* pc_relative. */ 658 0, /* bitpos. */ 659 complain_overflow_unsigned, /* complain_on_overflow. */ 660 bfin_bfd_reloc, /* special_function. */ 661 "R_BFIN_BYTE_DATA", /* name. */ 662 FALSE, /* partial_inplace. */ 663 0, /* src_mask. */ 664 0xFF, /* dst_mask. */ 665 TRUE), /* pcrel_offset. */ 666 667 HOWTO (R_BFIN_BYTE2_DATA, /* type. */ 668 0, /* rightshift. */ 669 1, /* size (0 = byte, 1 = short, 2 = long). */ 670 16, /* bitsize. */ 671 FALSE, /* pc_relative. */ 672 0, /* bitpos. */ 673 complain_overflow_signed, /* complain_on_overflow. */ 674 bfin_bfd_reloc, /* special_function. */ 675 "R_BFIN_BYTE2_DATA", /* name. */ 676 FALSE, /* partial_inplace. */ 677 0, /* src_mask. */ 678 0xFFFF, /* dst_mask. */ 679 TRUE), /* pcrel_offset. */ 680 681 HOWTO (R_BFIN_BYTE4_DATA, /* type. */ 682 0, /* rightshift. */ 683 2, /* size (0 = byte, 1 = short, 2 = long). */ 684 32, /* bitsize. */ 685 FALSE, /* pc_relative. */ 686 0, /* bitpos. */ 687 complain_overflow_unsigned, /* complain_on_overflow. */ 688 bfin_byte4_reloc, /* special_function. */ 689 "R_BFIN_BYTE4_DATA", /* name. */ 690 FALSE, /* partial_inplace. */ 691 0, /* src_mask. */ 692 0xFFFFFFFF, /* dst_mask. */ 693 TRUE), /* pcrel_offset. */ 694 695 HOWTO (R_BFIN_PCREL11, /* type. */ 696 1, /* rightshift. */ 697 1, /* size (0 = byte, 1 = short, 2 = long). */ 698 10, /* bitsize. */ 699 TRUE, /* pc_relative. */ 700 0, /* bitpos. */ 701 complain_overflow_unsigned, /* complain_on_overflow. */ 702 bfin_bfd_reloc, /* special_function. */ 703 "R_BFIN_PCREL11", /* name. */ 704 FALSE, /* partial_inplace. */ 705 0, /* src_mask. */ 706 0x000003FF, /* dst_mask. */ 707 FALSE), /* pcrel_offset. */ 708 709 710 /* A 18-bit signed operand with the GOT offset for the address of 711 the symbol. */ 712 HOWTO (R_BFIN_GOT17M4, /* type */ 713 2, /* rightshift */ 714 1, /* size (0 = byte, 1 = short, 2 = long) */ 715 16, /* bitsize */ 716 FALSE, /* pc_relative */ 717 0, /* bitpos */ 718 complain_overflow_signed, /* complain_on_overflow */ 719 bfd_elf_generic_reloc, /* special_function */ 720 "R_BFIN_GOT17M4", /* name */ 721 FALSE, /* partial_inplace */ 722 0xffff, /* src_mask */ 723 0xffff, /* dst_mask */ 724 FALSE), /* pcrel_offset */ 725 726 /* The upper 16 bits of the GOT offset for the address of the 727 symbol. */ 728 HOWTO (R_BFIN_GOTHI, /* type */ 729 0, /* rightshift */ 730 1, /* size (0 = byte, 1 = short, 2 = long) */ 731 16, /* bitsize */ 732 FALSE, /* pc_relative */ 733 0, /* bitpos */ 734 complain_overflow_dont, /* complain_on_overflow */ 735 bfd_elf_generic_reloc, /* special_function */ 736 "R_BFIN_GOTHI", /* name */ 737 FALSE, /* partial_inplace */ 738 0xffff, /* src_mask */ 739 0xffff, /* dst_mask */ 740 FALSE), /* pcrel_offset */ 741 742 /* The lower 16 bits of the GOT offset for the address of the 743 symbol. */ 744 HOWTO (R_BFIN_GOTLO, /* type */ 745 0, /* rightshift */ 746 1, /* size (0 = byte, 1 = short, 2 = long) */ 747 16, /* bitsize */ 748 FALSE, /* pc_relative */ 749 0, /* bitpos */ 750 complain_overflow_dont, /* complain_on_overflow */ 751 bfd_elf_generic_reloc, /* special_function */ 752 "R_BFIN_GOTLO", /* name */ 753 FALSE, /* partial_inplace */ 754 0xffff, /* src_mask */ 755 0xffff, /* dst_mask */ 756 FALSE), /* pcrel_offset */ 757 758 /* The 32-bit address of the canonical descriptor of a function. */ 759 HOWTO (R_BFIN_FUNCDESC, /* type */ 760 0, /* rightshift */ 761 2, /* size (0 = byte, 1 = short, 2 = long) */ 762 32, /* bitsize */ 763 FALSE, /* pc_relative */ 764 0, /* bitpos */ 765 complain_overflow_bitfield, /* complain_on_overflow */ 766 bfd_elf_generic_reloc, /* special_function */ 767 "R_BFIN_FUNCDESC", /* name */ 768 FALSE, /* partial_inplace */ 769 0xffffffff, /* src_mask */ 770 0xffffffff, /* dst_mask */ 771 FALSE), /* pcrel_offset */ 772 773 /* A 12-bit signed operand with the GOT offset for the address of 774 canonical descriptor of a function. */ 775 HOWTO (R_BFIN_FUNCDESC_GOT17M4, /* type */ 776 2, /* rightshift */ 777 1, /* size (0 = byte, 1 = short, 2 = long) */ 778 16, /* bitsize */ 779 FALSE, /* pc_relative */ 780 0, /* bitpos */ 781 complain_overflow_signed, /* complain_on_overflow */ 782 bfd_elf_generic_reloc, /* special_function */ 783 "R_BFIN_FUNCDESC_GOT17M4", /* name */ 784 FALSE, /* partial_inplace */ 785 0xffff, /* src_mask */ 786 0xffff, /* dst_mask */ 787 FALSE), /* pcrel_offset */ 788 789 /* The upper 16 bits of the GOT offset for the address of the 790 canonical descriptor of a function. */ 791 HOWTO (R_BFIN_FUNCDESC_GOTHI, /* type */ 792 0, /* rightshift */ 793 1, /* size (0 = byte, 1 = short, 2 = long) */ 794 16, /* bitsize */ 795 FALSE, /* pc_relative */ 796 0, /* bitpos */ 797 complain_overflow_dont, /* complain_on_overflow */ 798 bfd_elf_generic_reloc, /* special_function */ 799 "R_BFIN_FUNCDESC_GOTHI", /* name */ 800 FALSE, /* partial_inplace */ 801 0xffff, /* src_mask */ 802 0xffff, /* dst_mask */ 803 FALSE), /* pcrel_offset */ 804 805 /* The lower 16 bits of the GOT offset for the address of the 806 canonical descriptor of a function. */ 807 HOWTO (R_BFIN_FUNCDESC_GOTLO, /* type */ 808 0, /* rightshift */ 809 1, /* size (0 = byte, 1 = short, 2 = long) */ 810 16, /* bitsize */ 811 FALSE, /* pc_relative */ 812 0, /* bitpos */ 813 complain_overflow_dont, /* complain_on_overflow */ 814 bfd_elf_generic_reloc, /* special_function */ 815 "R_BFIN_FUNCDESC_GOTLO", /* name */ 816 FALSE, /* partial_inplace */ 817 0xffff, /* src_mask */ 818 0xffff, /* dst_mask */ 819 FALSE), /* pcrel_offset */ 820 821 /* The 32-bit address of the canonical descriptor of a function. */ 822 HOWTO (R_BFIN_FUNCDESC_VALUE, /* type */ 823 0, /* rightshift */ 824 2, /* size (0 = byte, 1 = short, 2 = long) */ 825 64, /* bitsize */ 826 FALSE, /* pc_relative */ 827 0, /* bitpos */ 828 complain_overflow_bitfield, /* complain_on_overflow */ 829 bfd_elf_generic_reloc, /* special_function */ 830 "R_BFIN_FUNCDESC_VALUE", /* name */ 831 FALSE, /* partial_inplace */ 832 0xffffffff, /* src_mask */ 833 0xffffffff, /* dst_mask */ 834 FALSE), /* pcrel_offset */ 835 836 /* A 12-bit signed operand with the GOT offset for the address of 837 canonical descriptor of a function. */ 838 HOWTO (R_BFIN_FUNCDESC_GOTOFF17M4, /* type */ 839 2, /* rightshift */ 840 1, /* size (0 = byte, 1 = short, 2 = long) */ 841 16, /* bitsize */ 842 FALSE, /* pc_relative */ 843 0, /* bitpos */ 844 complain_overflow_signed, /* complain_on_overflow */ 845 bfd_elf_generic_reloc, /* special_function */ 846 "R_BFIN_FUNCDESC_GOTOFF17M4", /* name */ 847 FALSE, /* partial_inplace */ 848 0xffff, /* src_mask */ 849 0xffff, /* dst_mask */ 850 FALSE), /* pcrel_offset */ 851 852 /* The upper 16 bits of the GOT offset for the address of the 853 canonical descriptor of a function. */ 854 HOWTO (R_BFIN_FUNCDESC_GOTOFFHI, /* type */ 855 0, /* rightshift */ 856 1, /* size (0 = byte, 1 = short, 2 = long) */ 857 16, /* bitsize */ 858 FALSE, /* pc_relative */ 859 0, /* bitpos */ 860 complain_overflow_dont, /* complain_on_overflow */ 861 bfd_elf_generic_reloc, /* special_function */ 862 "R_BFIN_FUNCDESC_GOTOFFHI", /* name */ 863 FALSE, /* partial_inplace */ 864 0xffff, /* src_mask */ 865 0xffff, /* dst_mask */ 866 FALSE), /* pcrel_offset */ 867 868 /* The lower 16 bits of the GOT offset for the address of the 869 canonical descriptor of a function. */ 870 HOWTO (R_BFIN_FUNCDESC_GOTOFFLO, /* type */ 871 0, /* rightshift */ 872 1, /* size (0 = byte, 1 = short, 2 = long) */ 873 16, /* bitsize */ 874 FALSE, /* pc_relative */ 875 0, /* bitpos */ 876 complain_overflow_dont, /* complain_on_overflow */ 877 bfd_elf_generic_reloc, /* special_function */ 878 "R_BFIN_FUNCDESC_GOTOFFLO", /* name */ 879 FALSE, /* partial_inplace */ 880 0xffff, /* src_mask */ 881 0xffff, /* dst_mask */ 882 FALSE), /* pcrel_offset */ 883 884 /* A 12-bit signed operand with the GOT offset for the address of 885 the symbol. */ 886 HOWTO (R_BFIN_GOTOFF17M4, /* type */ 887 2, /* rightshift */ 888 1, /* size (0 = byte, 1 = short, 2 = long) */ 889 16, /* bitsize */ 890 FALSE, /* pc_relative */ 891 0, /* bitpos */ 892 complain_overflow_signed, /* complain_on_overflow */ 893 bfd_elf_generic_reloc, /* special_function */ 894 "R_BFIN_GOTOFF17M4", /* name */ 895 FALSE, /* partial_inplace */ 896 0xffff, /* src_mask */ 897 0xffff, /* dst_mask */ 898 FALSE), /* pcrel_offset */ 899 900 /* The upper 16 bits of the GOT offset for the address of the 901 symbol. */ 902 HOWTO (R_BFIN_GOTOFFHI, /* type */ 903 0, /* rightshift */ 904 1, /* size (0 = byte, 1 = short, 2 = long) */ 905 16, /* bitsize */ 906 FALSE, /* pc_relative */ 907 0, /* bitpos */ 908 complain_overflow_dont, /* complain_on_overflow */ 909 bfd_elf_generic_reloc, /* special_function */ 910 "R_BFIN_GOTOFFHI", /* name */ 911 FALSE, /* partial_inplace */ 912 0xffff, /* src_mask */ 913 0xffff, /* dst_mask */ 914 FALSE), /* pcrel_offset */ 915 916 /* The lower 16 bits of the GOT offset for the address of the 917 symbol. */ 918 HOWTO (R_BFIN_GOTOFFLO, /* type */ 919 0, /* rightshift */ 920 1, /* size (0 = byte, 1 = short, 2 = long) */ 921 16, /* bitsize */ 922 FALSE, /* pc_relative */ 923 0, /* bitpos */ 924 complain_overflow_dont, /* complain_on_overflow */ 925 bfd_elf_generic_reloc, /* special_function */ 926 "R_BFIN_GOTOFFLO", /* name */ 927 FALSE, /* partial_inplace */ 928 0xffff, /* src_mask */ 929 0xffff, /* dst_mask */ 930 FALSE), /* pcrel_offset */ 931 }; 932 933 static reloc_howto_type bfin_gnuext_howto_table [] = 934 { 935 HOWTO (R_BFIN_PLTPC, /* type. */ 936 0, /* rightshift. */ 937 1, /* size (0 = byte, 1 = short, 2 = long). */ 938 16, /* bitsize. */ 939 FALSE, /* pc_relative. */ 940 0, /* bitpos. */ 941 complain_overflow_bitfield, /* complain_on_overflow. */ 942 bfin_pltpc_reloc, /* special_function. */ 943 "R_BFIN_PLTPC", /* name. */ 944 FALSE, /* partial_inplace. */ 945 0xffff, /* src_mask. */ 946 0xffff, /* dst_mask. */ 947 FALSE), /* pcrel_offset. */ 948 949 HOWTO (R_BFIN_GOT, /* type. */ 950 0, /* rightshift. */ 951 1, /* size (0 = byte, 1 = short, 2 = long). */ 952 16, /* bitsize. */ 953 FALSE, /* pc_relative. */ 954 0, /* bitpos. */ 955 complain_overflow_bitfield, /* complain_on_overflow. */ 956 bfd_elf_generic_reloc, /* special_function. */ 957 "R_BFIN_GOT", /* name. */ 958 FALSE, /* partial_inplace. */ 959 0x7fff, /* src_mask. */ 960 0x7fff, /* dst_mask. */ 961 FALSE), /* pcrel_offset. */ 962 963 /* GNU extension to record C++ vtable hierarchy. */ 964 HOWTO (R_BFIN_GNU_VTINHERIT, /* type. */ 965 0, /* rightshift. */ 966 2, /* size (0 = byte, 1 = short, 2 = long). */ 967 0, /* bitsize. */ 968 FALSE, /* pc_relative. */ 969 0, /* bitpos. */ 970 complain_overflow_dont, /* complain_on_overflow. */ 971 NULL, /* special_function. */ 972 "R_BFIN_GNU_VTINHERIT", /* name. */ 973 FALSE, /* partial_inplace. */ 974 0, /* src_mask. */ 975 0, /* dst_mask. */ 976 FALSE), /* pcrel_offset. */ 977 978 /* GNU extension to record C++ vtable member usage. */ 979 HOWTO (R_BFIN_GNU_VTENTRY, /* type. */ 980 0, /* rightshift. */ 981 2, /* size (0 = byte, 1 = short, 2 = long). */ 982 0, /* bitsize. */ 983 FALSE, /* pc_relative. */ 984 0, /* bitpos. */ 985 complain_overflow_dont, /* complain_on_overflow. */ 986 _bfd_elf_rel_vtable_reloc_fn, /* special_function. */ 987 "R_BFIN_GNU_VTENTRY", /* name. */ 988 FALSE, /* partial_inplace. */ 989 0, /* src_mask. */ 990 0, /* dst_mask. */ 991 FALSE) /* pcrel_offset. */ 992 }; 993 994 struct bfin_reloc_map 995 { 996 bfd_reloc_code_real_type bfd_reloc_val; 997 unsigned int bfin_reloc_val; 998 }; 999 1000 static const struct bfin_reloc_map bfin_reloc_map [] = 1001 { 1002 { BFD_RELOC_NONE, R_BFIN_UNUSED0 }, 1003 { BFD_RELOC_BFIN_5_PCREL, R_BFIN_PCREL5M2 }, 1004 { BFD_RELOC_NONE, R_BFIN_UNUSED1 }, 1005 { BFD_RELOC_BFIN_10_PCREL, R_BFIN_PCREL10 }, 1006 { BFD_RELOC_BFIN_12_PCREL_JUMP, R_BFIN_PCREL12_JUMP }, 1007 { BFD_RELOC_BFIN_16_IMM, R_BFIN_RIMM16 }, 1008 { BFD_RELOC_BFIN_16_LOW, R_BFIN_LUIMM16 }, 1009 { BFD_RELOC_BFIN_16_HIGH, R_BFIN_HUIMM16 }, 1010 { BFD_RELOC_BFIN_12_PCREL_JUMP_S, R_BFIN_PCREL12_JUMP_S }, 1011 { BFD_RELOC_24_PCREL, R_BFIN_PCREL24 }, 1012 { BFD_RELOC_24_PCREL, R_BFIN_PCREL24 }, 1013 { BFD_RELOC_BFIN_24_PCREL_JUMP_L, R_BFIN_PCREL24_JUMP_L }, 1014 { BFD_RELOC_NONE, R_BFIN_UNUSEDB }, 1015 { BFD_RELOC_NONE, R_BFIN_UNUSEDC }, 1016 { BFD_RELOC_BFIN_24_PCREL_CALL_X, R_BFIN_PCREL24_CALL_X }, 1017 { BFD_RELOC_8, R_BFIN_BYTE_DATA }, 1018 { BFD_RELOC_16, R_BFIN_BYTE2_DATA }, 1019 { BFD_RELOC_32, R_BFIN_BYTE4_DATA }, 1020 { BFD_RELOC_BFIN_11_PCREL, R_BFIN_PCREL11 }, 1021 { BFD_RELOC_BFIN_GOT, R_BFIN_GOT }, 1022 { BFD_RELOC_BFIN_PLTPC, R_BFIN_PLTPC }, 1023 1024 { BFD_RELOC_BFIN_GOT17M4, R_BFIN_GOT17M4 }, 1025 { BFD_RELOC_BFIN_GOTHI, R_BFIN_GOTHI }, 1026 { BFD_RELOC_BFIN_GOTLO, R_BFIN_GOTLO }, 1027 { BFD_RELOC_BFIN_FUNCDESC, R_BFIN_FUNCDESC }, 1028 { BFD_RELOC_BFIN_FUNCDESC_GOT17M4, R_BFIN_FUNCDESC_GOT17M4 }, 1029 { BFD_RELOC_BFIN_FUNCDESC_GOTHI, R_BFIN_FUNCDESC_GOTHI }, 1030 { BFD_RELOC_BFIN_FUNCDESC_GOTLO, R_BFIN_FUNCDESC_GOTLO }, 1031 { BFD_RELOC_BFIN_FUNCDESC_VALUE, R_BFIN_FUNCDESC_VALUE }, 1032 { BFD_RELOC_BFIN_FUNCDESC_GOTOFF17M4, R_BFIN_FUNCDESC_GOTOFF17M4 }, 1033 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFHI, R_BFIN_FUNCDESC_GOTOFFHI }, 1034 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFLO, R_BFIN_FUNCDESC_GOTOFFLO }, 1035 { BFD_RELOC_BFIN_GOTOFF17M4, R_BFIN_GOTOFF17M4 }, 1036 { BFD_RELOC_BFIN_GOTOFFHI, R_BFIN_GOTOFFHI }, 1037 { BFD_RELOC_BFIN_GOTOFFLO, R_BFIN_GOTOFFLO }, 1038 1039 { BFD_RELOC_VTABLE_INHERIT, R_BFIN_GNU_VTINHERIT }, 1040 { BFD_RELOC_VTABLE_ENTRY, R_BFIN_GNU_VTENTRY }, 1041 }; 1042 1043 1044 static bfd_boolean 1045 bfin_info_to_howto (bfd *abfd, 1046 arelent *cache_ptr, 1047 Elf_Internal_Rela *dst) 1048 { 1049 unsigned int r_type; 1050 1051 r_type = ELF32_R_TYPE (dst->r_info); 1052 1053 if (r_type <= BFIN_RELOC_MAX) 1054 cache_ptr->howto = &bfin_howto_table [r_type]; 1055 1056 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX) 1057 cache_ptr->howto = &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN]; 1058 1059 else 1060 { 1061 /* xgettext:c-format */ 1062 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 1063 abfd, r_type); 1064 bfd_set_error (bfd_error_bad_value); 1065 return FALSE; 1066 } 1067 1068 return TRUE; 1069 } 1070 1071 /* Given a BFD reloc type, return the howto. */ 1072 static reloc_howto_type * 1073 bfin_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, 1074 bfd_reloc_code_real_type code) 1075 { 1076 unsigned int i; 1077 unsigned int r_type = (unsigned int) -1; 1078 1079 for (i = sizeof (bfin_reloc_map) / sizeof (bfin_reloc_map[0]); i--;) 1080 if (bfin_reloc_map[i].bfd_reloc_val == code) 1081 r_type = bfin_reloc_map[i].bfin_reloc_val; 1082 1083 if (r_type <= BFIN_RELOC_MAX) 1084 return &bfin_howto_table [r_type]; 1085 1086 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX) 1087 return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN]; 1088 1089 return (reloc_howto_type *) NULL; 1090 } 1091 1092 static reloc_howto_type * 1093 bfin_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1094 const char *r_name) 1095 { 1096 unsigned int i; 1097 1098 for (i = 0; 1099 i < (sizeof (bfin_howto_table) 1100 / sizeof (bfin_howto_table[0])); 1101 i++) 1102 if (bfin_howto_table[i].name != NULL 1103 && strcasecmp (bfin_howto_table[i].name, r_name) == 0) 1104 return &bfin_howto_table[i]; 1105 1106 for (i = 0; 1107 i < (sizeof (bfin_gnuext_howto_table) 1108 / sizeof (bfin_gnuext_howto_table[0])); 1109 i++) 1110 if (bfin_gnuext_howto_table[i].name != NULL 1111 && strcasecmp (bfin_gnuext_howto_table[i].name, r_name) == 0) 1112 return &bfin_gnuext_howto_table[i]; 1113 1114 return NULL; 1115 } 1116 1117 /* Given a bfin relocation type, return the howto. */ 1118 static reloc_howto_type * 1119 bfin_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, 1120 unsigned int r_type) 1121 { 1122 if (r_type <= BFIN_RELOC_MAX) 1123 return &bfin_howto_table [r_type]; 1124 1125 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX) 1126 return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN]; 1127 1128 return (reloc_howto_type *) NULL; 1129 } 1130 1131 /* Set by ld emulation if --code-in-l1. */ 1132 bfd_boolean elf32_bfin_code_in_l1 = 0; 1133 1134 /* Set by ld emulation if --data-in-l1. */ 1135 bfd_boolean elf32_bfin_data_in_l1 = 0; 1136 1137 static bfd_boolean 1138 elf32_bfin_final_write_processing (bfd *abfd) 1139 { 1140 if (elf32_bfin_code_in_l1) 1141 elf_elfheader (abfd)->e_flags |= EF_BFIN_CODE_IN_L1; 1142 if (elf32_bfin_data_in_l1) 1143 elf_elfheader (abfd)->e_flags |= EF_BFIN_DATA_IN_L1; 1144 return _bfd_elf_final_write_processing (abfd); 1145 } 1146 1147 /* Return TRUE if the name is a local label. 1148 bfin local labels begin with L$. */ 1149 static bfd_boolean 1150 bfin_is_local_label_name (bfd *abfd, const char *label) 1151 { 1152 if (label[0] == 'L' && label[1] == '$' ) 1153 return TRUE; 1154 1155 return _bfd_elf_is_local_label_name (abfd, label); 1156 } 1157 1158 /* Look through the relocs for a section during the first phase, and 1159 allocate space in the global offset table or procedure linkage 1160 table. */ 1161 1162 static bfd_boolean 1163 bfin_check_relocs (bfd * abfd, 1164 struct bfd_link_info *info, 1165 asection *sec, 1166 const Elf_Internal_Rela *relocs) 1167 { 1168 bfd *dynobj; 1169 Elf_Internal_Shdr *symtab_hdr; 1170 struct elf_link_hash_entry **sym_hashes; 1171 bfd_signed_vma *local_got_refcounts; 1172 const Elf_Internal_Rela *rel; 1173 const Elf_Internal_Rela *rel_end; 1174 asection *sgot; 1175 asection *srelgot; 1176 1177 if (bfd_link_relocatable (info)) 1178 return TRUE; 1179 1180 dynobj = elf_hash_table (info)->dynobj; 1181 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1182 sym_hashes = elf_sym_hashes (abfd); 1183 local_got_refcounts = elf_local_got_refcounts (abfd); 1184 1185 sgot = NULL; 1186 srelgot = NULL; 1187 1188 rel_end = relocs + sec->reloc_count; 1189 for (rel = relocs; rel < rel_end; rel++) 1190 { 1191 unsigned long r_symndx; 1192 struct elf_link_hash_entry *h; 1193 1194 r_symndx = ELF32_R_SYM (rel->r_info); 1195 if (r_symndx < symtab_hdr->sh_info) 1196 h = NULL; 1197 else 1198 { 1199 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1200 } 1201 1202 switch (ELF32_R_TYPE (rel->r_info)) 1203 { 1204 /* This relocation describes the C++ object vtable hierarchy. 1205 Reconstruct it for later use during GC. */ 1206 case R_BFIN_GNU_VTINHERIT: 1207 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1208 return FALSE; 1209 break; 1210 1211 /* This relocation describes which C++ vtable entries 1212 are actually used. Record for later use during GC. */ 1213 case R_BFIN_GNU_VTENTRY: 1214 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1215 return FALSE; 1216 break; 1217 1218 case R_BFIN_GOT: 1219 if (h != NULL 1220 && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0) 1221 break; 1222 /* Fall through. */ 1223 1224 if (dynobj == NULL) 1225 { 1226 /* Create the .got section. */ 1227 elf_hash_table (info)->dynobj = dynobj = abfd; 1228 if (!_bfd_elf_create_got_section (dynobj, info)) 1229 return FALSE; 1230 } 1231 1232 sgot = elf_hash_table (info)->sgot; 1233 srelgot = elf_hash_table (info)->srelgot; 1234 BFD_ASSERT (sgot != NULL); 1235 1236 if (h != NULL) 1237 { 1238 if (h->got.refcount == 0) 1239 { 1240 /* Make sure this symbol is output as a dynamic symbol. */ 1241 if (h->dynindx == -1 && !h->forced_local) 1242 { 1243 if (!bfd_elf_link_record_dynamic_symbol (info, h)) 1244 return FALSE; 1245 } 1246 1247 /* Allocate space in the .got section. */ 1248 sgot->size += 4; 1249 /* Allocate relocation space. */ 1250 srelgot->size += sizeof (Elf32_External_Rela); 1251 } 1252 h->got.refcount++; 1253 } 1254 else 1255 { 1256 /* This is a global offset table entry for a local symbol. */ 1257 if (local_got_refcounts == NULL) 1258 { 1259 bfd_size_type size; 1260 1261 size = symtab_hdr->sh_info; 1262 size *= sizeof (bfd_signed_vma); 1263 local_got_refcounts = ((bfd_signed_vma *) 1264 bfd_zalloc (abfd, size)); 1265 if (local_got_refcounts == NULL) 1266 return FALSE; 1267 elf_local_got_refcounts (abfd) = local_got_refcounts; 1268 } 1269 if (local_got_refcounts[r_symndx] == 0) 1270 { 1271 sgot->size += 4; 1272 if (bfd_link_pic (info)) 1273 { 1274 /* If we are generating a shared object, we need to 1275 output a R_68K_RELATIVE reloc so that the dynamic 1276 linker can adjust this GOT entry. */ 1277 srelgot->size += sizeof (Elf32_External_Rela); 1278 } 1279 } 1280 local_got_refcounts[r_symndx]++; 1281 } 1282 break; 1283 1284 default: 1285 break; 1286 } 1287 } 1288 1289 return TRUE; 1290 } 1291 1292 static enum elf_reloc_type_class 1293 elf32_bfin_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 1294 const asection *rel_sec ATTRIBUTE_UNUSED, 1295 const Elf_Internal_Rela * rela) 1296 { 1297 switch ((int) ELF32_R_TYPE (rela->r_info)) 1298 { 1299 default: 1300 return reloc_class_normal; 1301 } 1302 } 1303 1304 static bfd_reloc_status_type 1305 bfin_final_link_relocate (Elf_Internal_Rela *rel, reloc_howto_type *howto, 1306 bfd *input_bfd, asection *input_section, 1307 bfd_byte *contents, bfd_vma address, 1308 bfd_vma value, bfd_vma addend) 1309 { 1310 int r_type = ELF32_R_TYPE (rel->r_info); 1311 1312 if (r_type == R_BFIN_PCREL24 || r_type == R_BFIN_PCREL24_JUMP_L) 1313 { 1314 bfd_reloc_status_type r = bfd_reloc_ok; 1315 bfd_vma x; 1316 1317 if (address > bfd_get_section_limit (input_bfd, input_section)) 1318 return bfd_reloc_outofrange; 1319 1320 value += addend; 1321 1322 /* Perform usual pc-relative correction. */ 1323 value -= input_section->output_section->vma + input_section->output_offset; 1324 value -= address; 1325 1326 /* We are getting reloc_entry->address 2 byte off from 1327 the start of instruction. Assuming absolute postion 1328 of the reloc data. But, following code had been written assuming 1329 reloc address is starting at begining of instruction. 1330 To compensate that I have increased the value of 1331 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */ 1332 1333 value += 2; 1334 address -= 2; 1335 1336 if ((value & 0xFF000000) != 0 1337 && (value & 0xFF000000) != 0xFF000000) 1338 r = bfd_reloc_overflow; 1339 1340 value >>= 1; 1341 1342 x = bfd_get_16 (input_bfd, contents + address); 1343 x = (x & 0xff00) | ((value >> 16) & 0xff); 1344 bfd_put_16 (input_bfd, x, contents + address); 1345 1346 x = bfd_get_16 (input_bfd, contents + address + 2); 1347 x = value & 0xFFFF; 1348 bfd_put_16 (input_bfd, x, contents + address + 2); 1349 return r; 1350 } 1351 1352 return _bfd_final_link_relocate (howto, input_bfd, input_section, contents, 1353 rel->r_offset, value, addend); 1354 1355 } 1356 1357 static bfd_boolean 1358 bfin_relocate_section (bfd * output_bfd, 1359 struct bfd_link_info *info, 1360 bfd * input_bfd, 1361 asection * input_section, 1362 bfd_byte * contents, 1363 Elf_Internal_Rela * relocs, 1364 Elf_Internal_Sym * local_syms, 1365 asection ** local_sections) 1366 { 1367 bfd *dynobj; 1368 Elf_Internal_Shdr *symtab_hdr; 1369 struct elf_link_hash_entry **sym_hashes; 1370 bfd_vma *local_got_offsets; 1371 asection *sgot; 1372 Elf_Internal_Rela *rel; 1373 Elf_Internal_Rela *relend; 1374 int i = 0; 1375 1376 dynobj = elf_hash_table (info)->dynobj; 1377 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 1378 sym_hashes = elf_sym_hashes (input_bfd); 1379 local_got_offsets = elf_local_got_offsets (input_bfd); 1380 1381 sgot = NULL; 1382 1383 rel = relocs; 1384 relend = relocs + input_section->reloc_count; 1385 for (; rel < relend; rel++, i++) 1386 { 1387 int r_type; 1388 reloc_howto_type *howto; 1389 unsigned long r_symndx; 1390 struct elf_link_hash_entry *h; 1391 Elf_Internal_Sym *sym; 1392 asection *sec; 1393 bfd_vma relocation = 0; 1394 bfd_boolean unresolved_reloc; 1395 bfd_reloc_status_type r; 1396 bfd_vma address; 1397 1398 r_type = ELF32_R_TYPE (rel->r_info); 1399 if (r_type < 0 || r_type >= 243) 1400 { 1401 bfd_set_error (bfd_error_bad_value); 1402 return FALSE; 1403 } 1404 1405 if (r_type == R_BFIN_GNU_VTENTRY 1406 || r_type == R_BFIN_GNU_VTINHERIT) 1407 continue; 1408 1409 howto = bfin_reloc_type_lookup (input_bfd, r_type); 1410 if (howto == NULL) 1411 { 1412 bfd_set_error (bfd_error_bad_value); 1413 return FALSE; 1414 } 1415 r_symndx = ELF32_R_SYM (rel->r_info); 1416 1417 h = NULL; 1418 sym = NULL; 1419 sec = NULL; 1420 unresolved_reloc = FALSE; 1421 1422 if (r_symndx < symtab_hdr->sh_info) 1423 { 1424 sym = local_syms + r_symndx; 1425 sec = local_sections[r_symndx]; 1426 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 1427 } 1428 else 1429 { 1430 bfd_boolean warned, ignored; 1431 1432 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 1433 r_symndx, symtab_hdr, sym_hashes, 1434 h, sec, relocation, 1435 unresolved_reloc, warned, ignored); 1436 } 1437 1438 if (sec != NULL && discarded_section (sec)) 1439 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 1440 rel, 1, relend, howto, 0, contents); 1441 1442 if (bfd_link_relocatable (info)) 1443 continue; 1444 1445 address = rel->r_offset; 1446 1447 /* Then, process normally. */ 1448 switch (r_type) 1449 { 1450 case R_BFIN_GNU_VTINHERIT: 1451 case R_BFIN_GNU_VTENTRY: 1452 return bfd_reloc_ok; 1453 1454 case R_BFIN_GOT: 1455 /* Relocation is to the address of the entry for this symbol 1456 in the global offset table. */ 1457 if (h != NULL 1458 && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0) 1459 goto do_default; 1460 /* Fall through. */ 1461 /* Relocation is the offset of the entry for this symbol in 1462 the global offset table. */ 1463 1464 { 1465 bfd_vma off; 1466 1467 if (dynobj == NULL) 1468 { 1469 /* Create the .got section. */ 1470 elf_hash_table (info)->dynobj = dynobj = output_bfd; 1471 if (!_bfd_elf_create_got_section (dynobj, info)) 1472 return FALSE; 1473 } 1474 1475 sgot = elf_hash_table (info)->sgot; 1476 BFD_ASSERT (sgot != NULL); 1477 1478 if (h != NULL) 1479 { 1480 bfd_boolean dyn; 1481 1482 off = h->got.offset; 1483 BFD_ASSERT (off != (bfd_vma) - 1); 1484 dyn = elf_hash_table (info)->dynamic_sections_created; 1485 1486 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 1487 bfd_link_pic (info), 1488 h) 1489 || (bfd_link_pic (info) 1490 && (info->symbolic 1491 || h->dynindx == -1 1492 || h->forced_local) 1493 && h->def_regular)) 1494 { 1495 /* This is actually a static link, or it is a 1496 -Bsymbolic link and the symbol is defined 1497 locally, or the symbol was forced to be local 1498 because of a version file.. We must initialize 1499 this entry in the global offset table. Since 1500 the offset must always be a multiple of 4, we 1501 use the least significant bit to record whether 1502 we have initialized it already. 1503 1504 When doing a dynamic link, we create a .rela.got 1505 relocation entry to initialize the value. This 1506 is done in the finish_dynamic_symbol routine. */ 1507 if ((off & 1) != 0) 1508 off &= ~1; 1509 else 1510 { 1511 bfd_put_32 (output_bfd, relocation, 1512 sgot->contents + off); 1513 h->got.offset |= 1; 1514 } 1515 } 1516 else 1517 unresolved_reloc = FALSE; 1518 } 1519 else 1520 { 1521 BFD_ASSERT (local_got_offsets != NULL); 1522 off = local_got_offsets[r_symndx]; 1523 BFD_ASSERT (off != (bfd_vma) - 1); 1524 1525 /* The offset must always be a multiple of 4. We use 1526 the least significant bit to record whether we have 1527 already generated the necessary reloc. */ 1528 if ((off & 1) != 0) 1529 off &= ~1; 1530 else 1531 { 1532 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 1533 1534 if (bfd_link_pic (info)) 1535 { 1536 asection *s; 1537 Elf_Internal_Rela outrel; 1538 bfd_byte *loc; 1539 1540 s = elf_hash_table (info)->srelgot; 1541 BFD_ASSERT (s != NULL); 1542 1543 outrel.r_offset = (sgot->output_section->vma 1544 + sgot->output_offset + off); 1545 outrel.r_info = 1546 ELF32_R_INFO (0, R_BFIN_PCREL24); 1547 outrel.r_addend = relocation; 1548 loc = s->contents; 1549 loc += 1550 s->reloc_count++ * sizeof (Elf32_External_Rela); 1551 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1552 } 1553 1554 local_got_offsets[r_symndx] |= 1; 1555 } 1556 } 1557 1558 relocation = sgot->output_offset + off; 1559 rel->r_addend = 0; 1560 /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */ 1561 relocation /= 4; 1562 } 1563 goto do_default; 1564 1565 default: 1566 do_default: 1567 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section, 1568 contents, address, 1569 relocation, rel->r_addend); 1570 1571 break; 1572 } 1573 1574 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 1575 because such sections are not SEC_ALLOC and thus ld.so will 1576 not process them. */ 1577 if (unresolved_reloc 1578 && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic) 1579 && _bfd_elf_section_offset (output_bfd, info, input_section, 1580 rel->r_offset) != (bfd_vma) -1) 1581 { 1582 _bfd_error_handler 1583 /* xgettext:c-format */ 1584 (_("%pB(%pA+%#" PRIx64 "): " 1585 "unresolvable relocation against symbol `%s'"), 1586 input_bfd, input_section, (uint64_t) rel->r_offset, 1587 h->root.root.string); 1588 return FALSE; 1589 } 1590 1591 if (r != bfd_reloc_ok) 1592 { 1593 const char *name; 1594 1595 if (h != NULL) 1596 name = h->root.root.string; 1597 else 1598 { 1599 name = bfd_elf_string_from_elf_section (input_bfd, 1600 symtab_hdr->sh_link, 1601 sym->st_name); 1602 if (name == NULL) 1603 return FALSE; 1604 if (*name == '\0') 1605 name = bfd_section_name (sec); 1606 } 1607 1608 if (r == bfd_reloc_overflow) 1609 (*info->callbacks->reloc_overflow) 1610 (info, (h ? &h->root : NULL), name, howto->name, 1611 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 1612 else 1613 { 1614 _bfd_error_handler 1615 /* xgettext:c-format */ 1616 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"), 1617 input_bfd, input_section, (uint64_t) rel->r_offset, 1618 name, (int) r); 1619 return FALSE; 1620 } 1621 } 1622 } 1623 1624 return TRUE; 1625 } 1626 1627 static asection * 1628 bfin_gc_mark_hook (asection * sec, 1629 struct bfd_link_info *info, 1630 Elf_Internal_Rela * rel, 1631 struct elf_link_hash_entry *h, 1632 Elf_Internal_Sym * sym) 1633 { 1634 if (h != NULL) 1635 switch (ELF32_R_TYPE (rel->r_info)) 1636 { 1637 case R_BFIN_GNU_VTINHERIT: 1638 case R_BFIN_GNU_VTENTRY: 1639 return NULL; 1640 } 1641 1642 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1643 } 1644 1645 extern const bfd_target bfin_elf32_fdpic_vec; 1646 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfin_elf32_fdpic_vec) 1647 1648 /* An extension of the elf hash table data structure, 1649 containing some additional Blackfin-specific data. */ 1650 struct bfinfdpic_elf_link_hash_table 1651 { 1652 struct elf_link_hash_table elf; 1653 1654 /* A pointer to the .rofixup section. */ 1655 asection *sgotfixup; 1656 /* GOT base offset. */ 1657 bfd_vma got0; 1658 /* Location of the first non-lazy PLT entry, i.e., the number of 1659 bytes taken by lazy PLT entries. */ 1660 bfd_vma plt0; 1661 /* A hash table holding information about which symbols were 1662 referenced with which PIC-related relocations. */ 1663 struct htab *relocs_info; 1664 /* Summary reloc information collected by 1665 _bfinfdpic_count_got_plt_entries. */ 1666 struct _bfinfdpic_dynamic_got_info *g; 1667 }; 1668 1669 /* Get the Blackfin ELF linker hash table from a link_info structure. */ 1670 1671 #define bfinfdpic_hash_table(p) \ 1672 ((is_elf_hash_table ((p)->hash) \ 1673 && elf_hash_table_id (elf_hash_table (p)) == BFIN_ELF_DATA) \ 1674 ? (struct bfinfdpic_elf_link_hash_table *) (p)->hash : NULL) 1675 1676 #define bfinfdpic_got_section(info) \ 1677 (bfinfdpic_hash_table (info)->elf.sgot) 1678 #define bfinfdpic_gotrel_section(info) \ 1679 (bfinfdpic_hash_table (info)->elf.srelgot) 1680 #define bfinfdpic_gotfixup_section(info) \ 1681 (bfinfdpic_hash_table (info)->sgotfixup) 1682 #define bfinfdpic_plt_section(info) \ 1683 (bfinfdpic_hash_table (info)->elf.splt) 1684 #define bfinfdpic_pltrel_section(info) \ 1685 (bfinfdpic_hash_table (info)->elf.srelplt) 1686 #define bfinfdpic_relocs_info(info) \ 1687 (bfinfdpic_hash_table (info)->relocs_info) 1688 #define bfinfdpic_got_initial_offset(info) \ 1689 (bfinfdpic_hash_table (info)->got0) 1690 #define bfinfdpic_plt_initial_offset(info) \ 1691 (bfinfdpic_hash_table (info)->plt0) 1692 #define bfinfdpic_dynamic_got_plt_info(info) \ 1693 (bfinfdpic_hash_table (info)->g) 1694 1695 /* The name of the dynamic interpreter. This is put in the .interp 1696 section. */ 1697 1698 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" 1699 1700 #define DEFAULT_STACK_SIZE 0x20000 1701 1702 /* This structure is used to collect the number of entries present in 1703 each addressable range of the got. */ 1704 struct _bfinfdpic_dynamic_got_info 1705 { 1706 /* Several bits of information about the current link. */ 1707 struct bfd_link_info *info; 1708 /* Total size needed for GOT entries within the 18- or 32-bit 1709 ranges. */ 1710 bfd_vma got17m4, gothilo; 1711 /* Total size needed for function descriptor entries within the 18- 1712 or 32-bit ranges. */ 1713 bfd_vma fd17m4, fdhilo; 1714 /* Total size needed function descriptor entries referenced in PLT 1715 entries, that would be profitable to place in offsets close to 1716 the PIC register. */ 1717 bfd_vma fdplt; 1718 /* Total size needed by lazy PLT entries. */ 1719 bfd_vma lzplt; 1720 /* Number of relocations carried over from input object files. */ 1721 unsigned long relocs; 1722 /* Number of fixups introduced by relocations in input object files. */ 1723 unsigned long fixups; 1724 }; 1725 1726 /* Create a Blackfin ELF linker hash table. */ 1727 1728 static struct bfd_link_hash_table * 1729 bfinfdpic_elf_link_hash_table_create (bfd *abfd) 1730 { 1731 struct bfinfdpic_elf_link_hash_table *ret; 1732 size_t amt = sizeof (struct bfinfdpic_elf_link_hash_table); 1733 1734 ret = bfd_zmalloc (amt); 1735 if (ret == NULL) 1736 return NULL; 1737 1738 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, 1739 _bfd_elf_link_hash_newfunc, 1740 sizeof (struct elf_link_hash_entry), 1741 BFIN_ELF_DATA)) 1742 { 1743 free (ret); 1744 return NULL; 1745 } 1746 1747 return &ret->elf.root; 1748 } 1749 1750 /* Decide whether a reference to a symbol can be resolved locally or 1751 not. If the symbol is protected, we want the local address, but 1752 its function descriptor must be assigned by the dynamic linker. */ 1753 #define BFINFDPIC_SYM_LOCAL(INFO, H) \ 1754 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \ 1755 || ! elf_hash_table (INFO)->dynamic_sections_created) 1756 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \ 1757 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created) 1758 1759 /* This structure collects information on what kind of GOT, PLT or 1760 function descriptors are required by relocations that reference a 1761 certain symbol. */ 1762 struct bfinfdpic_relocs_info 1763 { 1764 /* The index of the symbol, as stored in the relocation r_info, if 1765 we have a local symbol; -1 otherwise. */ 1766 long symndx; 1767 union 1768 { 1769 /* The input bfd in which the symbol is defined, if it's a local 1770 symbol. */ 1771 bfd *abfd; 1772 /* If symndx == -1, the hash table entry corresponding to a global 1773 symbol (even if it turns out to bind locally, in which case it 1774 should ideally be replaced with section's symndx + addend). */ 1775 struct elf_link_hash_entry *h; 1776 } d; 1777 /* The addend of the relocation that references the symbol. */ 1778 bfd_vma addend; 1779 1780 /* The fields above are used to identify an entry. The fields below 1781 contain information on how an entry is used and, later on, which 1782 locations it was assigned. */ 1783 /* The following 2 fields record whether the symbol+addend above was 1784 ever referenced with a GOT relocation. The 17M4 suffix indicates a 1785 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */ 1786 unsigned got17m4; 1787 unsigned gothilo; 1788 /* Whether a FUNCDESC relocation references symbol+addend. */ 1789 unsigned fd; 1790 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */ 1791 unsigned fdgot17m4; 1792 unsigned fdgothilo; 1793 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */ 1794 unsigned fdgoff17m4; 1795 unsigned fdgoffhilo; 1796 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or 1797 GOTOFFHI relocations. The addend doesn't really matter, since we 1798 envision that this will only be used to check whether the symbol 1799 is mapped to the same segment as the got. */ 1800 unsigned gotoff; 1801 /* Whether symbol+addend is referenced by a LABEL24 relocation. */ 1802 unsigned call; 1803 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE 1804 relocation. */ 1805 unsigned sym; 1806 /* Whether we need a PLT entry for a symbol. Should be implied by 1807 something like: 1808 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */ 1809 unsigned plt:1; 1810 /* Whether a function descriptor should be created in this link unit 1811 for symbol+addend. Should be implied by something like: 1812 (plt || fdgotoff17m4 || fdgotofflohi 1813 || ((fd || fdgot17m4 || fdgothilo) 1814 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */ 1815 unsigned privfd:1; 1816 /* Whether a lazy PLT entry is needed for this symbol+addend. 1817 Should be implied by something like: 1818 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h) 1819 && ! (info->flags & DF_BIND_NOW)) */ 1820 unsigned lazyplt:1; 1821 /* Whether we've already emitted GOT relocations and PLT entries as 1822 needed for this symbol. */ 1823 unsigned done:1; 1824 1825 /* The number of R_BFIN_BYTE4_DATA, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE 1826 relocations referencing the symbol. */ 1827 unsigned relocs32, relocsfd, relocsfdv; 1828 1829 /* The number of .rofixups entries and dynamic relocations allocated 1830 for this symbol, minus any that might have already been used. */ 1831 unsigned fixups, dynrelocs; 1832 1833 /* The offsets of the GOT entries assigned to symbol+addend, to the 1834 function descriptor's address, and to a function descriptor, 1835 respectively. Should be zero if unassigned. The offsets are 1836 counted from the value that will be assigned to the PIC register, 1837 not from the beginning of the .got section. */ 1838 bfd_signed_vma got_entry, fdgot_entry, fd_entry; 1839 /* The offsets of the PLT entries assigned to symbol+addend, 1840 non-lazy and lazy, respectively. If unassigned, should be 1841 (bfd_vma)-1. */ 1842 bfd_vma plt_entry, lzplt_entry; 1843 }; 1844 1845 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */ 1846 static hashval_t 1847 bfinfdpic_relocs_info_hash (const void *entry_) 1848 { 1849 const struct bfinfdpic_relocs_info *entry = entry_; 1850 1851 return (entry->symndx == -1 1852 ? (long) entry->d.h->root.root.hash 1853 : entry->symndx + (long) entry->d.abfd->id * 257) + entry->addend; 1854 } 1855 1856 /* Test whether the key fields of two bfinfdpic_relocs_info entries are 1857 identical. */ 1858 static int 1859 bfinfdpic_relocs_info_eq (const void *entry1, const void *entry2) 1860 { 1861 const struct bfinfdpic_relocs_info *e1 = entry1; 1862 const struct bfinfdpic_relocs_info *e2 = entry2; 1863 1864 return e1->symndx == e2->symndx && e1->addend == e2->addend 1865 && (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd); 1866 } 1867 1868 /* Find or create an entry in a hash table HT that matches the key 1869 fields of the given ENTRY. If it's not found, memory for a new 1870 entry is allocated in ABFD's obstack. */ 1871 static struct bfinfdpic_relocs_info * 1872 bfinfdpic_relocs_info_find (struct htab *ht, 1873 bfd *abfd, 1874 const struct bfinfdpic_relocs_info *entry, 1875 enum insert_option insert) 1876 { 1877 struct bfinfdpic_relocs_info **loc; 1878 1879 if (!ht) 1880 return NULL; 1881 1882 loc = (struct bfinfdpic_relocs_info **) htab_find_slot (ht, entry, insert); 1883 1884 if (! loc) 1885 return NULL; 1886 1887 if (*loc) 1888 return *loc; 1889 1890 *loc = bfd_zalloc (abfd, sizeof (**loc)); 1891 1892 if (! *loc) 1893 return *loc; 1894 1895 (*loc)->symndx = entry->symndx; 1896 (*loc)->d = entry->d; 1897 (*loc)->addend = entry->addend; 1898 (*loc)->plt_entry = (bfd_vma)-1; 1899 (*loc)->lzplt_entry = (bfd_vma)-1; 1900 1901 return *loc; 1902 } 1903 1904 /* Obtain the address of the entry in HT associated with H's symbol + 1905 addend, creating a new entry if none existed. ABFD is only used 1906 for memory allocation purposes. */ 1907 inline static struct bfinfdpic_relocs_info * 1908 bfinfdpic_relocs_info_for_global (struct htab *ht, 1909 bfd *abfd, 1910 struct elf_link_hash_entry *h, 1911 bfd_vma addend, 1912 enum insert_option insert) 1913 { 1914 struct bfinfdpic_relocs_info entry; 1915 1916 entry.symndx = -1; 1917 entry.d.h = h; 1918 entry.addend = addend; 1919 1920 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert); 1921 } 1922 1923 /* Obtain the address of the entry in HT associated with the SYMNDXth 1924 local symbol of the input bfd ABFD, plus the addend, creating a new 1925 entry if none existed. */ 1926 inline static struct bfinfdpic_relocs_info * 1927 bfinfdpic_relocs_info_for_local (struct htab *ht, 1928 bfd *abfd, 1929 long symndx, 1930 bfd_vma addend, 1931 enum insert_option insert) 1932 { 1933 struct bfinfdpic_relocs_info entry; 1934 1935 entry.symndx = symndx; 1936 entry.d.abfd = abfd; 1937 entry.addend = addend; 1938 1939 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert); 1940 } 1941 1942 /* Merge fields set by check_relocs() of two entries that end up being 1943 mapped to the same (presumably global) symbol. */ 1944 1945 inline static void 1946 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info *e2, 1947 struct bfinfdpic_relocs_info const *e1) 1948 { 1949 e2->got17m4 |= e1->got17m4; 1950 e2->gothilo |= e1->gothilo; 1951 e2->fd |= e1->fd; 1952 e2->fdgot17m4 |= e1->fdgot17m4; 1953 e2->fdgothilo |= e1->fdgothilo; 1954 e2->fdgoff17m4 |= e1->fdgoff17m4; 1955 e2->fdgoffhilo |= e1->fdgoffhilo; 1956 e2->gotoff |= e1->gotoff; 1957 e2->call |= e1->call; 1958 e2->sym |= e1->sym; 1959 } 1960 1961 /* Every block of 65535 lazy PLT entries shares a single call to the 1962 resolver, inserted in the 32768th lazy PLT entry (i.e., entry # 1963 32767, counting from 0). All other lazy PLT entries branch to it 1964 in a single instruction. */ 1965 1966 #define LZPLT_RESOLVER_EXTRA 10 1967 #define LZPLT_NORMAL_SIZE 6 1968 #define LZPLT_ENTRIES 1362 1969 1970 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA) 1971 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2) 1972 1973 /* Add a dynamic relocation to the SRELOC section. */ 1974 1975 inline static bfd_vma 1976 _bfinfdpic_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset, 1977 int reloc_type, long dynindx, bfd_vma addend, 1978 struct bfinfdpic_relocs_info *entry) 1979 { 1980 Elf_Internal_Rela outrel; 1981 bfd_vma reloc_offset; 1982 1983 outrel.r_offset = offset; 1984 outrel.r_info = ELF32_R_INFO (dynindx, reloc_type); 1985 outrel.r_addend = addend; 1986 1987 reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel); 1988 BFD_ASSERT (reloc_offset < sreloc->size); 1989 bfd_elf32_swap_reloc_out (output_bfd, &outrel, 1990 sreloc->contents + reloc_offset); 1991 sreloc->reloc_count++; 1992 1993 /* If the entry's index is zero, this relocation was probably to a 1994 linkonce section that got discarded. We reserved a dynamic 1995 relocation, but it was for another entry than the one we got at 1996 the time of emitting the relocation. Unfortunately there's no 1997 simple way for us to catch this situation, since the relocation 1998 is cleared right before calling relocate_section, at which point 1999 we no longer know what the relocation used to point to. */ 2000 if (entry->symndx) 2001 { 2002 BFD_ASSERT (entry->dynrelocs > 0); 2003 entry->dynrelocs--; 2004 } 2005 2006 return reloc_offset; 2007 } 2008 2009 /* Add a fixup to the ROFIXUP section. */ 2010 2011 static bfd_vma 2012 _bfinfdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset, 2013 struct bfinfdpic_relocs_info *entry) 2014 { 2015 bfd_vma fixup_offset; 2016 2017 if (rofixup->flags & SEC_EXCLUDE) 2018 return -1; 2019 2020 fixup_offset = rofixup->reloc_count * 4; 2021 if (rofixup->contents) 2022 { 2023 BFD_ASSERT (fixup_offset < rofixup->size); 2024 bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset); 2025 } 2026 rofixup->reloc_count++; 2027 2028 if (entry && entry->symndx) 2029 { 2030 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc 2031 above. */ 2032 BFD_ASSERT (entry->fixups > 0); 2033 entry->fixups--; 2034 } 2035 2036 return fixup_offset; 2037 } 2038 2039 /* Find the segment number in which OSEC, and output section, is 2040 located. */ 2041 2042 static unsigned 2043 _bfinfdpic_osec_to_segment (bfd *output_bfd, asection *osec) 2044 { 2045 Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section (output_bfd, osec); 2046 2047 return (p != NULL) ? p - elf_tdata (output_bfd)->phdr : -1; 2048 } 2049 2050 inline static bfd_boolean 2051 _bfinfdpic_osec_readonly_p (bfd *output_bfd, asection *osec) 2052 { 2053 unsigned seg = _bfinfdpic_osec_to_segment (output_bfd, osec); 2054 2055 return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W); 2056 } 2057 2058 /* Generate relocations for GOT entries, function descriptors, and 2059 code for PLT and lazy PLT entries. */ 2060 2061 inline static bfd_boolean 2062 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry, 2063 bfd *output_bfd, 2064 struct bfd_link_info *info, 2065 asection *sec, 2066 Elf_Internal_Sym *sym, 2067 bfd_vma addend) 2068 { 2069 bfd_vma fd_lazy_rel_offset = (bfd_vma) -1; 2070 int dynindx = -1; 2071 2072 if (entry->done) 2073 return TRUE; 2074 entry->done = 1; 2075 2076 if (entry->got_entry || entry->fdgot_entry || entry->fd_entry) 2077 { 2078 /* If the symbol is dynamic, consider it for dynamic 2079 relocations, otherwise decay to section + offset. */ 2080 if (entry->symndx == -1 && entry->d.h->dynindx != -1) 2081 dynindx = entry->d.h->dynindx; 2082 else 2083 { 2084 if (sec 2085 && sec->output_section 2086 && ! bfd_is_abs_section (sec->output_section) 2087 && ! bfd_is_und_section (sec->output_section)) 2088 dynindx = elf_section_data (sec->output_section)->dynindx; 2089 else 2090 dynindx = 0; 2091 } 2092 } 2093 2094 /* Generate relocation for GOT entry pointing to the symbol. */ 2095 if (entry->got_entry) 2096 { 2097 int idx = dynindx; 2098 bfd_vma ad = addend; 2099 2100 /* If the symbol is dynamic but binds locally, use 2101 section+offset. */ 2102 if (sec && (entry->symndx != -1 2103 || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) 2104 { 2105 if (entry->symndx == -1) 2106 ad += entry->d.h->root.u.def.value; 2107 else 2108 ad += sym->st_value; 2109 ad += sec->output_offset; 2110 if (sec->output_section && elf_section_data (sec->output_section)) 2111 idx = elf_section_data (sec->output_section)->dynindx; 2112 else 2113 idx = 0; 2114 } 2115 2116 /* If we're linking an executable at a fixed address, we can 2117 omit the dynamic relocation as long as the symbol is local to 2118 this module. */ 2119 if (bfd_link_pde (info) 2120 && (entry->symndx != -1 2121 || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) 2122 { 2123 if (sec) 2124 ad += sec->output_section->vma; 2125 if (entry->symndx != -1 2126 || entry->d.h->root.type != bfd_link_hash_undefweak) 2127 _bfinfdpic_add_rofixup (output_bfd, 2128 bfinfdpic_gotfixup_section (info), 2129 bfinfdpic_got_section (info)->output_section 2130 ->vma 2131 + bfinfdpic_got_section (info)->output_offset 2132 + bfinfdpic_got_initial_offset (info) 2133 + entry->got_entry, entry); 2134 } 2135 else 2136 _bfinfdpic_add_dyn_reloc (output_bfd, bfinfdpic_gotrel_section (info), 2137 _bfd_elf_section_offset 2138 (output_bfd, info, 2139 bfinfdpic_got_section (info), 2140 bfinfdpic_got_initial_offset (info) 2141 + entry->got_entry) 2142 + bfinfdpic_got_section (info) 2143 ->output_section->vma 2144 + bfinfdpic_got_section (info)->output_offset, 2145 R_BFIN_BYTE4_DATA, idx, ad, entry); 2146 2147 bfd_put_32 (output_bfd, ad, 2148 bfinfdpic_got_section (info)->contents 2149 + bfinfdpic_got_initial_offset (info) 2150 + entry->got_entry); 2151 } 2152 2153 /* Generate relocation for GOT entry pointing to a canonical 2154 function descriptor. */ 2155 if (entry->fdgot_entry) 2156 { 2157 int reloc, idx; 2158 bfd_vma ad = 0; 2159 2160 if (! (entry->symndx == -1 2161 && entry->d.h->root.type == bfd_link_hash_undefweak 2162 && BFINFDPIC_SYM_LOCAL (info, entry->d.h))) 2163 { 2164 /* If the symbol is dynamic and there may be dynamic symbol 2165 resolution because we are, or are linked with, a shared 2166 library, emit a FUNCDESC relocation such that the dynamic 2167 linker will allocate the function descriptor. If the 2168 symbol needs a non-local function descriptor but binds 2169 locally (e.g., its visibility is protected, emit a 2170 dynamic relocation decayed to section+offset. */ 2171 if (entry->symndx == -1 2172 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h) 2173 && BFINFDPIC_SYM_LOCAL (info, entry->d.h) 2174 && !bfd_link_pde (info)) 2175 { 2176 reloc = R_BFIN_FUNCDESC; 2177 idx = elf_section_data (entry->d.h->root.u.def.section 2178 ->output_section)->dynindx; 2179 ad = entry->d.h->root.u.def.section->output_offset 2180 + entry->d.h->root.u.def.value; 2181 } 2182 else if (entry->symndx == -1 2183 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)) 2184 { 2185 reloc = R_BFIN_FUNCDESC; 2186 idx = dynindx; 2187 ad = addend; 2188 if (ad) 2189 return FALSE; 2190 } 2191 else 2192 { 2193 /* Otherwise, we know we have a private function descriptor, 2194 so reference it directly. */ 2195 if (elf_hash_table (info)->dynamic_sections_created) 2196 BFD_ASSERT (entry->privfd); 2197 reloc = R_BFIN_BYTE4_DATA; 2198 idx = elf_section_data (bfinfdpic_got_section (info) 2199 ->output_section)->dynindx; 2200 ad = bfinfdpic_got_section (info)->output_offset 2201 + bfinfdpic_got_initial_offset (info) + entry->fd_entry; 2202 } 2203 2204 /* If there is room for dynamic symbol resolution, emit the 2205 dynamic relocation. However, if we're linking an 2206 executable at a fixed location, we won't have emitted a 2207 dynamic symbol entry for the got section, so idx will be 2208 zero, which means we can and should compute the address 2209 of the private descriptor ourselves. */ 2210 if (bfd_link_pde (info) 2211 && (entry->symndx != -1 2212 || BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h))) 2213 { 2214 ad += bfinfdpic_got_section (info)->output_section->vma; 2215 _bfinfdpic_add_rofixup (output_bfd, 2216 bfinfdpic_gotfixup_section (info), 2217 bfinfdpic_got_section (info) 2218 ->output_section->vma 2219 + bfinfdpic_got_section (info) 2220 ->output_offset 2221 + bfinfdpic_got_initial_offset (info) 2222 + entry->fdgot_entry, entry); 2223 } 2224 else 2225 _bfinfdpic_add_dyn_reloc (output_bfd, 2226 bfinfdpic_gotrel_section (info), 2227 _bfd_elf_section_offset 2228 (output_bfd, info, 2229 bfinfdpic_got_section (info), 2230 bfinfdpic_got_initial_offset (info) 2231 + entry->fdgot_entry) 2232 + bfinfdpic_got_section (info) 2233 ->output_section->vma 2234 + bfinfdpic_got_section (info) 2235 ->output_offset, 2236 reloc, idx, ad, entry); 2237 } 2238 2239 bfd_put_32 (output_bfd, ad, 2240 bfinfdpic_got_section (info)->contents 2241 + bfinfdpic_got_initial_offset (info) 2242 + entry->fdgot_entry); 2243 } 2244 2245 /* Generate relocation to fill in a private function descriptor in 2246 the GOT. */ 2247 if (entry->fd_entry) 2248 { 2249 int idx = dynindx; 2250 bfd_vma ad = addend; 2251 bfd_vma ofst; 2252 long lowword, highword; 2253 2254 /* If the symbol is dynamic but binds locally, use 2255 section+offset. */ 2256 if (sec && (entry->symndx != -1 2257 || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) 2258 { 2259 if (entry->symndx == -1) 2260 ad += entry->d.h->root.u.def.value; 2261 else 2262 ad += sym->st_value; 2263 ad += sec->output_offset; 2264 if (sec->output_section && elf_section_data (sec->output_section)) 2265 idx = elf_section_data (sec->output_section)->dynindx; 2266 else 2267 idx = 0; 2268 } 2269 2270 /* If we're linking an executable at a fixed address, we can 2271 omit the dynamic relocation as long as the symbol is local to 2272 this module. */ 2273 if (bfd_link_pde (info) 2274 && (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) 2275 { 2276 if (sec) 2277 ad += sec->output_section->vma; 2278 ofst = 0; 2279 if (entry->symndx != -1 2280 || entry->d.h->root.type != bfd_link_hash_undefweak) 2281 { 2282 _bfinfdpic_add_rofixup (output_bfd, 2283 bfinfdpic_gotfixup_section (info), 2284 bfinfdpic_got_section (info) 2285 ->output_section->vma 2286 + bfinfdpic_got_section (info) 2287 ->output_offset 2288 + bfinfdpic_got_initial_offset (info) 2289 + entry->fd_entry, entry); 2290 _bfinfdpic_add_rofixup (output_bfd, 2291 bfinfdpic_gotfixup_section (info), 2292 bfinfdpic_got_section (info) 2293 ->output_section->vma 2294 + bfinfdpic_got_section (info) 2295 ->output_offset 2296 + bfinfdpic_got_initial_offset (info) 2297 + entry->fd_entry + 4, entry); 2298 } 2299 } 2300 else 2301 { 2302 ofst 2303 = _bfinfdpic_add_dyn_reloc (output_bfd, 2304 entry->lazyplt 2305 ? bfinfdpic_pltrel_section (info) 2306 : bfinfdpic_gotrel_section (info), 2307 _bfd_elf_section_offset 2308 (output_bfd, info, 2309 bfinfdpic_got_section (info), 2310 bfinfdpic_got_initial_offset (info) 2311 + entry->fd_entry) 2312 + bfinfdpic_got_section (info) 2313 ->output_section->vma 2314 + bfinfdpic_got_section (info) 2315 ->output_offset, 2316 R_BFIN_FUNCDESC_VALUE, idx, ad, entry); 2317 } 2318 2319 /* If we've omitted the dynamic relocation, just emit the fixed 2320 addresses of the symbol and of the local GOT base offset. */ 2321 if (bfd_link_pde (info) 2322 && sec 2323 && sec->output_section) 2324 { 2325 lowword = ad; 2326 highword = bfinfdpic_got_section (info)->output_section->vma 2327 + bfinfdpic_got_section (info)->output_offset 2328 + bfinfdpic_got_initial_offset (info); 2329 } 2330 else if (entry->lazyplt) 2331 { 2332 if (ad) 2333 return FALSE; 2334 2335 fd_lazy_rel_offset = ofst; 2336 2337 /* A function descriptor used for lazy or local resolving is 2338 initialized such that its high word contains the output 2339 section index in which the PLT entries are located, and 2340 the low word contains the address of the lazy PLT entry 2341 entry point, that must be within the memory region 2342 assigned to that section. */ 2343 lowword = entry->lzplt_entry + 4 2344 + bfinfdpic_plt_section (info)->output_offset 2345 + bfinfdpic_plt_section (info)->output_section->vma; 2346 highword = _bfinfdpic_osec_to_segment 2347 (output_bfd, bfinfdpic_plt_section (info)->output_section); 2348 } 2349 else 2350 { 2351 /* A function descriptor for a local function gets the index 2352 of the section. For a non-local function, it's 2353 disregarded. */ 2354 lowword = ad; 2355 if (sec == NULL 2356 || (entry->symndx == -1 && entry->d.h->dynindx != -1 2357 && entry->d.h->dynindx == idx)) 2358 highword = 0; 2359 else 2360 highword = _bfinfdpic_osec_to_segment 2361 (output_bfd, sec->output_section); 2362 } 2363 2364 bfd_put_32 (output_bfd, lowword, 2365 bfinfdpic_got_section (info)->contents 2366 + bfinfdpic_got_initial_offset (info) 2367 + entry->fd_entry); 2368 bfd_put_32 (output_bfd, highword, 2369 bfinfdpic_got_section (info)->contents 2370 + bfinfdpic_got_initial_offset (info) 2371 + entry->fd_entry + 4); 2372 } 2373 2374 /* Generate code for the PLT entry. */ 2375 if (entry->plt_entry != (bfd_vma) -1) 2376 { 2377 bfd_byte *plt_code = bfinfdpic_plt_section (info)->contents 2378 + entry->plt_entry; 2379 2380 BFD_ASSERT (entry->fd_entry); 2381 2382 /* Figure out what kind of PLT entry we need, depending on the 2383 location of the function descriptor within the GOT. */ 2384 if (entry->fd_entry >= -(1 << (18 - 1)) 2385 && entry->fd_entry + 4 < (1 << (18 - 1))) 2386 { 2387 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */ 2388 bfd_put_32 (output_bfd, 2389 0xe519 | ((entry->fd_entry << 14) & 0xFFFF0000), 2390 plt_code); 2391 bfd_put_32 (output_bfd, 2392 0xe51b | (((entry->fd_entry + 4) << 14) & 0xFFFF0000), 2393 plt_code + 4); 2394 plt_code += 8; 2395 } 2396 else 2397 { 2398 /* P1.L = fd_entry; P1.H = fd_entry; 2399 P3 = P3 + P1; 2400 P1 = [P3]; 2401 P3 = [P3 + 4]; */ 2402 bfd_put_32 (output_bfd, 2403 0xe109 | (entry->fd_entry << 16), 2404 plt_code); 2405 bfd_put_32 (output_bfd, 2406 0xe149 | (entry->fd_entry & 0xFFFF0000), 2407 plt_code + 4); 2408 bfd_put_16 (output_bfd, 0x5ad9, plt_code + 8); 2409 bfd_put_16 (output_bfd, 0x9159, plt_code + 10); 2410 bfd_put_16 (output_bfd, 0xac5b, plt_code + 12); 2411 plt_code += 14; 2412 } 2413 /* JUMP (P1) */ 2414 bfd_put_16 (output_bfd, 0x0051, plt_code); 2415 } 2416 2417 /* Generate code for the lazy PLT entry. */ 2418 if (entry->lzplt_entry != (bfd_vma) -1) 2419 { 2420 bfd_byte *lzplt_code = bfinfdpic_plt_section (info)->contents 2421 + entry->lzplt_entry; 2422 bfd_vma resolverStub_addr; 2423 2424 bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code); 2425 lzplt_code += 4; 2426 2427 resolverStub_addr = entry->lzplt_entry / BFINFDPIC_LZPLT_BLOCK_SIZE 2428 * BFINFDPIC_LZPLT_BLOCK_SIZE + BFINFDPIC_LZPLT_RESOLV_LOC; 2429 if (resolverStub_addr >= bfinfdpic_plt_initial_offset (info)) 2430 resolverStub_addr = bfinfdpic_plt_initial_offset (info) - LZPLT_NORMAL_SIZE - LZPLT_RESOLVER_EXTRA; 2431 2432 if (entry->lzplt_entry == resolverStub_addr) 2433 { 2434 /* This is a lazy PLT entry that includes a resolver call. 2435 P2 = [P3]; 2436 R3 = [P3 + 4]; 2437 JUMP (P2); */ 2438 bfd_put_32 (output_bfd, 2439 0xa05b915a, 2440 lzplt_code); 2441 bfd_put_16 (output_bfd, 0x0052, lzplt_code + 4); 2442 } 2443 else 2444 { 2445 /* JUMP.S resolverStub */ 2446 bfd_put_16 (output_bfd, 2447 0x2000 2448 | (((resolverStub_addr - entry->lzplt_entry) 2449 / 2) & (((bfd_vma)1 << 12) - 1)), 2450 lzplt_code); 2451 } 2452 } 2453 2454 return TRUE; 2455 } 2456 2457 /* Relocate an Blackfin ELF section. 2458 2459 The RELOCATE_SECTION function is called by the new ELF backend linker 2460 to handle the relocations for a section. 2461 2462 The relocs are always passed as Rela structures; if the section 2463 actually uses Rel structures, the r_addend field will always be 2464 zero. 2465 2466 This function is responsible for adjusting the section contents as 2467 necessary, and (if using Rela relocs and generating a relocatable 2468 output file) adjusting the reloc addend as necessary. 2469 2470 This function does not have to worry about setting the reloc 2471 address or the reloc symbol index. 2472 2473 LOCAL_SYMS is a pointer to the swapped in local symbols. 2474 2475 LOCAL_SECTIONS is an array giving the section in the input file 2476 corresponding to the st_shndx field of each local symbol. 2477 2478 The global hash table entry for the global symbols can be found 2479 via elf_sym_hashes (input_bfd). 2480 2481 When generating relocatable output, this function must handle 2482 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 2483 going to be the section symbol corresponding to the output 2484 section, which means that the addend must be adjusted 2485 accordingly. */ 2486 2487 static bfd_boolean 2488 bfinfdpic_relocate_section (bfd * output_bfd, 2489 struct bfd_link_info *info, 2490 bfd * input_bfd, 2491 asection * input_section, 2492 bfd_byte * contents, 2493 Elf_Internal_Rela * relocs, 2494 Elf_Internal_Sym * local_syms, 2495 asection ** local_sections) 2496 { 2497 Elf_Internal_Shdr *symtab_hdr; 2498 struct elf_link_hash_entry **sym_hashes; 2499 Elf_Internal_Rela *rel; 2500 Elf_Internal_Rela *relend; 2501 unsigned isec_segment, got_segment, plt_segment, 2502 check_segment[2]; 2503 int silence_segment_error = !bfd_link_pic (info); 2504 2505 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; 2506 sym_hashes = elf_sym_hashes (input_bfd); 2507 relend = relocs + input_section->reloc_count; 2508 2509 isec_segment = _bfinfdpic_osec_to_segment (output_bfd, 2510 input_section->output_section); 2511 if (IS_FDPIC (output_bfd) && bfinfdpic_got_section (info)) 2512 got_segment = _bfinfdpic_osec_to_segment (output_bfd, 2513 bfinfdpic_got_section (info) 2514 ->output_section); 2515 else 2516 got_segment = -1; 2517 if (IS_FDPIC (output_bfd) && elf_hash_table (info)->dynamic_sections_created) 2518 plt_segment = _bfinfdpic_osec_to_segment (output_bfd, 2519 bfinfdpic_plt_section (info) 2520 ->output_section); 2521 else 2522 plt_segment = -1; 2523 2524 for (rel = relocs; rel < relend; rel ++) 2525 { 2526 reloc_howto_type *howto; 2527 unsigned long r_symndx; 2528 Elf_Internal_Sym *sym; 2529 asection *sec; 2530 struct elf_link_hash_entry *h; 2531 bfd_vma relocation; 2532 bfd_reloc_status_type r; 2533 const char * name = NULL; 2534 int r_type; 2535 asection *osec; 2536 struct bfinfdpic_relocs_info *picrel; 2537 bfd_vma orig_addend = rel->r_addend; 2538 2539 r_type = ELF32_R_TYPE (rel->r_info); 2540 2541 if (r_type == R_BFIN_GNU_VTINHERIT 2542 || r_type == R_BFIN_GNU_VTENTRY) 2543 continue; 2544 2545 r_symndx = ELF32_R_SYM (rel->r_info); 2546 howto = bfin_reloc_type_lookup (input_bfd, r_type); 2547 if (howto == NULL) 2548 { 2549 bfd_set_error (bfd_error_bad_value); 2550 return FALSE; 2551 } 2552 2553 h = NULL; 2554 sym = NULL; 2555 sec = NULL; 2556 picrel = NULL; 2557 2558 if (r_symndx < symtab_hdr->sh_info) 2559 { 2560 sym = local_syms + r_symndx; 2561 osec = sec = local_sections [r_symndx]; 2562 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2563 2564 name = bfd_elf_string_from_elf_section 2565 (input_bfd, symtab_hdr->sh_link, sym->st_name); 2566 name = name == NULL ? bfd_section_name (sec) : name; 2567 } 2568 else 2569 { 2570 bfd_boolean warned, ignored; 2571 bfd_boolean unresolved_reloc; 2572 2573 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 2574 r_symndx, symtab_hdr, sym_hashes, 2575 h, sec, relocation, 2576 unresolved_reloc, warned, ignored); 2577 osec = sec; 2578 } 2579 2580 if (sec != NULL && discarded_section (sec)) 2581 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2582 rel, 1, relend, howto, 0, contents); 2583 2584 if (bfd_link_relocatable (info)) 2585 continue; 2586 2587 if (h != NULL 2588 && (h->root.type == bfd_link_hash_defined 2589 || h->root.type == bfd_link_hash_defweak) 2590 && !BFINFDPIC_SYM_LOCAL (info, h)) 2591 { 2592 osec = sec = NULL; 2593 relocation = 0; 2594 } 2595 2596 switch (r_type) 2597 { 2598 case R_BFIN_PCREL24: 2599 case R_BFIN_PCREL24_JUMP_L: 2600 case R_BFIN_BYTE4_DATA: 2601 if (! IS_FDPIC (output_bfd)) 2602 goto non_fdpic; 2603 /* Fall through. */ 2604 2605 case R_BFIN_GOT17M4: 2606 case R_BFIN_GOTHI: 2607 case R_BFIN_GOTLO: 2608 case R_BFIN_FUNCDESC_GOT17M4: 2609 case R_BFIN_FUNCDESC_GOTHI: 2610 case R_BFIN_FUNCDESC_GOTLO: 2611 case R_BFIN_GOTOFF17M4: 2612 case R_BFIN_GOTOFFHI: 2613 case R_BFIN_GOTOFFLO: 2614 case R_BFIN_FUNCDESC_GOTOFF17M4: 2615 case R_BFIN_FUNCDESC_GOTOFFHI: 2616 case R_BFIN_FUNCDESC_GOTOFFLO: 2617 case R_BFIN_FUNCDESC: 2618 case R_BFIN_FUNCDESC_VALUE: 2619 if ((input_section->flags & SEC_ALLOC) == 0) 2620 break; 2621 2622 if (h != NULL) 2623 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info 2624 (info), input_bfd, h, 2625 orig_addend, INSERT); 2626 else 2627 /* In order to find the entry we created before, we must 2628 use the original addend, not the one that may have been 2629 modified by _bfd_elf_rela_local_sym(). */ 2630 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info 2631 (info), input_bfd, r_symndx, 2632 orig_addend, INSERT); 2633 if (! picrel) 2634 return FALSE; 2635 2636 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info, 2637 osec, sym, 2638 rel->r_addend)) 2639 { 2640 _bfd_error_handler 2641 /* xgettext:c-format */ 2642 (_("%pB: relocation at `%pA+%#" PRIx64 "' " 2643 "references symbol `%s' with nonzero addend"), 2644 input_bfd, input_section, (uint64_t) rel->r_offset, name); 2645 return FALSE; 2646 2647 } 2648 2649 break; 2650 2651 default: 2652 non_fdpic: 2653 picrel = NULL; 2654 if (h && ! BFINFDPIC_SYM_LOCAL (info, h) 2655 && _bfd_elf_section_offset (output_bfd, info, input_section, 2656 rel->r_offset) != (bfd_vma) -1) 2657 { 2658 info->callbacks->warning 2659 (info, _("relocation references symbol not defined in the module"), 2660 name, input_bfd, input_section, rel->r_offset); 2661 return FALSE; 2662 } 2663 break; 2664 } 2665 2666 switch (r_type) 2667 { 2668 case R_BFIN_PCREL24: 2669 case R_BFIN_PCREL24_JUMP_L: 2670 check_segment[0] = isec_segment; 2671 if (! IS_FDPIC (output_bfd)) 2672 check_segment[1] = isec_segment; 2673 else if (picrel->plt) 2674 { 2675 relocation = bfinfdpic_plt_section (info)->output_section->vma 2676 + bfinfdpic_plt_section (info)->output_offset 2677 + picrel->plt_entry; 2678 check_segment[1] = plt_segment; 2679 } 2680 /* We don't want to warn on calls to undefined weak symbols, 2681 as calls to them must be protected by non-NULL tests 2682 anyway, and unprotected calls would invoke undefined 2683 behavior. */ 2684 else if (picrel->symndx == -1 2685 && picrel->d.h->root.type == bfd_link_hash_undefweak) 2686 check_segment[1] = check_segment[0]; 2687 else 2688 check_segment[1] = sec 2689 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section) 2690 : (unsigned)-1; 2691 break; 2692 2693 case R_BFIN_GOT17M4: 2694 case R_BFIN_GOTHI: 2695 case R_BFIN_GOTLO: 2696 relocation = picrel->got_entry; 2697 check_segment[0] = check_segment[1] = got_segment; 2698 break; 2699 2700 case R_BFIN_FUNCDESC_GOT17M4: 2701 case R_BFIN_FUNCDESC_GOTHI: 2702 case R_BFIN_FUNCDESC_GOTLO: 2703 relocation = picrel->fdgot_entry; 2704 check_segment[0] = check_segment[1] = got_segment; 2705 break; 2706 2707 case R_BFIN_GOTOFFHI: 2708 case R_BFIN_GOTOFF17M4: 2709 case R_BFIN_GOTOFFLO: 2710 relocation -= bfinfdpic_got_section (info)->output_section->vma 2711 + bfinfdpic_got_section (info)->output_offset 2712 + bfinfdpic_got_initial_offset (info); 2713 check_segment[0] = got_segment; 2714 check_segment[1] = sec 2715 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section) 2716 : (unsigned)-1; 2717 break; 2718 2719 case R_BFIN_FUNCDESC_GOTOFF17M4: 2720 case R_BFIN_FUNCDESC_GOTOFFHI: 2721 case R_BFIN_FUNCDESC_GOTOFFLO: 2722 relocation = picrel->fd_entry; 2723 check_segment[0] = check_segment[1] = got_segment; 2724 break; 2725 2726 case R_BFIN_FUNCDESC: 2727 { 2728 int dynindx; 2729 bfd_vma addend = rel->r_addend; 2730 2731 if (! (h && h->root.type == bfd_link_hash_undefweak 2732 && BFINFDPIC_SYM_LOCAL (info, h))) 2733 { 2734 /* If the symbol is dynamic and there may be dynamic 2735 symbol resolution because we are or are linked with a 2736 shared library, emit a FUNCDESC relocation such that 2737 the dynamic linker will allocate the function 2738 descriptor. If the symbol needs a non-local function 2739 descriptor but binds locally (e.g., its visibility is 2740 protected, emit a dynamic relocation decayed to 2741 section+offset. */ 2742 if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h) 2743 && BFINFDPIC_SYM_LOCAL (info, h) 2744 && !bfd_link_pde (info)) 2745 { 2746 dynindx = elf_section_data (h->root.u.def.section 2747 ->output_section)->dynindx; 2748 addend += h->root.u.def.section->output_offset 2749 + h->root.u.def.value; 2750 } 2751 else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)) 2752 { 2753 if (addend) 2754 { 2755 info->callbacks->warning 2756 (info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"), 2757 name, input_bfd, input_section, rel->r_offset); 2758 return FALSE; 2759 } 2760 dynindx = h->dynindx; 2761 } 2762 else 2763 { 2764 /* Otherwise, we know we have a private function 2765 descriptor, so reference it directly. */ 2766 BFD_ASSERT (picrel->privfd); 2767 r_type = R_BFIN_BYTE4_DATA; 2768 dynindx = elf_section_data (bfinfdpic_got_section (info) 2769 ->output_section)->dynindx; 2770 addend = bfinfdpic_got_section (info)->output_offset 2771 + bfinfdpic_got_initial_offset (info) 2772 + picrel->fd_entry; 2773 } 2774 2775 /* If there is room for dynamic symbol resolution, emit 2776 the dynamic relocation. However, if we're linking an 2777 executable at a fixed location, we won't have emitted a 2778 dynamic symbol entry for the got section, so idx will 2779 be zero, which means we can and should compute the 2780 address of the private descriptor ourselves. */ 2781 if (bfd_link_pde (info) 2782 && (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h))) 2783 { 2784 bfd_vma offset; 2785 2786 addend += bfinfdpic_got_section (info)->output_section->vma; 2787 if ((bfd_section_flags (input_section->output_section) 2788 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) 2789 { 2790 if (_bfinfdpic_osec_readonly_p (output_bfd, 2791 input_section 2792 ->output_section)) 2793 { 2794 info->callbacks->warning 2795 (info, 2796 _("cannot emit fixups in read-only section"), 2797 name, input_bfd, input_section, rel->r_offset); 2798 return FALSE; 2799 } 2800 2801 offset = _bfd_elf_section_offset 2802 (output_bfd, info, 2803 input_section, rel->r_offset); 2804 2805 if (offset != (bfd_vma)-1) 2806 _bfinfdpic_add_rofixup (output_bfd, 2807 bfinfdpic_gotfixup_section 2808 (info), 2809 offset + input_section 2810 ->output_section->vma 2811 + input_section->output_offset, 2812 picrel); 2813 } 2814 } 2815 else if ((bfd_section_flags (input_section->output_section) 2816 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) 2817 { 2818 bfd_vma offset; 2819 2820 if (_bfinfdpic_osec_readonly_p (output_bfd, 2821 input_section 2822 ->output_section)) 2823 { 2824 info->callbacks->warning 2825 (info, 2826 _("cannot emit dynamic relocations in read-only section"), 2827 name, input_bfd, input_section, rel->r_offset); 2828 return FALSE; 2829 } 2830 offset = _bfd_elf_section_offset (output_bfd, info, 2831 input_section, rel->r_offset); 2832 2833 if (offset != (bfd_vma)-1) 2834 _bfinfdpic_add_dyn_reloc (output_bfd, 2835 bfinfdpic_gotrel_section (info), 2836 offset + input_section 2837 ->output_section->vma 2838 + input_section->output_offset, 2839 r_type, 2840 dynindx, addend, picrel); 2841 } 2842 else 2843 addend += bfinfdpic_got_section (info)->output_section->vma; 2844 } 2845 2846 /* We want the addend in-place because dynamic 2847 relocations are REL. Setting relocation to it should 2848 arrange for it to be installed. */ 2849 relocation = addend - rel->r_addend; 2850 } 2851 check_segment[0] = check_segment[1] = got_segment; 2852 break; 2853 2854 case R_BFIN_BYTE4_DATA: 2855 if (! IS_FDPIC (output_bfd)) 2856 { 2857 check_segment[0] = check_segment[1] = -1; 2858 break; 2859 } 2860 /* Fall through. */ 2861 case R_BFIN_FUNCDESC_VALUE: 2862 { 2863 int dynindx; 2864 bfd_vma addend = rel->r_addend; 2865 bfd_vma offset; 2866 offset = _bfd_elf_section_offset (output_bfd, info, 2867 input_section, rel->r_offset); 2868 2869 /* If the symbol is dynamic but binds locally, use 2870 section+offset. */ 2871 if (h && ! BFINFDPIC_SYM_LOCAL (info, h)) 2872 { 2873 if (addend && r_type == R_BFIN_FUNCDESC_VALUE) 2874 { 2875 info->callbacks->warning 2876 (info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"), 2877 name, input_bfd, input_section, rel->r_offset); 2878 return FALSE; 2879 } 2880 dynindx = h->dynindx; 2881 } 2882 else 2883 { 2884 if (h) 2885 addend += h->root.u.def.value; 2886 else 2887 addend += sym->st_value; 2888 if (osec) 2889 addend += osec->output_offset; 2890 if (osec && osec->output_section 2891 && ! bfd_is_abs_section (osec->output_section) 2892 && ! bfd_is_und_section (osec->output_section)) 2893 dynindx = elf_section_data (osec->output_section)->dynindx; 2894 else 2895 dynindx = 0; 2896 } 2897 2898 /* If we're linking an executable at a fixed address, we 2899 can omit the dynamic relocation as long as the symbol 2900 is defined in the current link unit (which is implied 2901 by its output section not being NULL). */ 2902 if (bfd_link_pde (info) 2903 && (!h || BFINFDPIC_SYM_LOCAL (info, h))) 2904 { 2905 if (osec) 2906 addend += osec->output_section->vma; 2907 if (IS_FDPIC (input_bfd) 2908 && (bfd_section_flags (input_section->output_section) 2909 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) 2910 { 2911 if (_bfinfdpic_osec_readonly_p (output_bfd, 2912 input_section 2913 ->output_section)) 2914 { 2915 info->callbacks->warning 2916 (info, 2917 _("cannot emit fixups in read-only section"), 2918 name, input_bfd, input_section, rel->r_offset); 2919 return FALSE; 2920 } 2921 if (!h || h->root.type != bfd_link_hash_undefweak) 2922 { 2923 if (offset != (bfd_vma)-1) 2924 { 2925 _bfinfdpic_add_rofixup (output_bfd, 2926 bfinfdpic_gotfixup_section 2927 (info), 2928 offset + input_section 2929 ->output_section->vma 2930 + input_section->output_offset, 2931 picrel); 2932 2933 if (r_type == R_BFIN_FUNCDESC_VALUE) 2934 _bfinfdpic_add_rofixup 2935 (output_bfd, 2936 bfinfdpic_gotfixup_section (info), 2937 offset + input_section->output_section->vma 2938 + input_section->output_offset + 4, picrel); 2939 } 2940 } 2941 } 2942 } 2943 else 2944 { 2945 if ((bfd_section_flags (input_section->output_section) 2946 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) 2947 { 2948 if (_bfinfdpic_osec_readonly_p (output_bfd, 2949 input_section 2950 ->output_section)) 2951 { 2952 info->callbacks->warning 2953 (info, 2954 _("cannot emit dynamic relocations in read-only section"), 2955 name, input_bfd, input_section, rel->r_offset); 2956 return FALSE; 2957 } 2958 2959 if (offset != (bfd_vma)-1) 2960 _bfinfdpic_add_dyn_reloc (output_bfd, 2961 bfinfdpic_gotrel_section (info), 2962 offset 2963 + input_section->output_section->vma 2964 + input_section->output_offset, 2965 r_type, dynindx, addend, picrel); 2966 } 2967 else if (osec) 2968 addend += osec->output_section->vma; 2969 /* We want the addend in-place because dynamic 2970 relocations are REL. Setting relocation to it 2971 should arrange for it to be installed. */ 2972 relocation = addend - rel->r_addend; 2973 } 2974 2975 if (r_type == R_BFIN_FUNCDESC_VALUE) 2976 { 2977 /* If we've omitted the dynamic relocation, just emit 2978 the fixed addresses of the symbol and of the local 2979 GOT base offset. */ 2980 if (bfd_link_pde (info) 2981 && (!h || BFINFDPIC_SYM_LOCAL (info, h))) 2982 bfd_put_32 (output_bfd, 2983 bfinfdpic_got_section (info)->output_section->vma 2984 + bfinfdpic_got_section (info)->output_offset 2985 + bfinfdpic_got_initial_offset (info), 2986 contents + rel->r_offset + 4); 2987 else 2988 /* A function descriptor used for lazy or local 2989 resolving is initialized such that its high word 2990 contains the output section index in which the 2991 PLT entries are located, and the low word 2992 contains the offset of the lazy PLT entry entry 2993 point into that section. */ 2994 bfd_put_32 (output_bfd, 2995 h && ! BFINFDPIC_SYM_LOCAL (info, h) 2996 ? 0 2997 : _bfinfdpic_osec_to_segment (output_bfd, 2998 sec 2999 ->output_section), 3000 contents + rel->r_offset + 4); 3001 } 3002 } 3003 check_segment[0] = check_segment[1] = got_segment; 3004 break; 3005 3006 default: 3007 check_segment[0] = isec_segment; 3008 check_segment[1] = sec 3009 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section) 3010 : (unsigned)-1; 3011 break; 3012 } 3013 3014 if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd)) 3015 { 3016 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d 3017 in the ld testsuite. */ 3018 /* This helps catch problems in GCC while we can't do more 3019 than static linking. The idea is to test whether the 3020 input file basename is crt0.o only once. */ 3021 if (silence_segment_error == 1) 3022 silence_segment_error = 3023 (strlen (bfd_get_filename (input_bfd)) == 6 3024 && filename_cmp (bfd_get_filename (input_bfd), "crt0.o") == 0) 3025 || (strlen (bfd_get_filename (input_bfd)) > 6 3026 && filename_cmp (bfd_get_filename (input_bfd) 3027 + strlen (bfd_get_filename (input_bfd)) - 7, 3028 "/crt0.o") == 0) 3029 ? -1 : 0; 3030 #endif 3031 if (!silence_segment_error 3032 /* We don't want duplicate errors for undefined 3033 symbols. */ 3034 && !(picrel && picrel->symndx == -1 3035 && picrel->d.h->root.type == bfd_link_hash_undefined)) 3036 info->callbacks->warning 3037 (info, 3038 bfd_link_pic (info) 3039 ? _("relocations between different segments are not supported") 3040 : _("warning: relocation references a different segment"), 3041 name, input_bfd, input_section, rel->r_offset); 3042 if (!silence_segment_error && bfd_link_pic (info)) 3043 return FALSE; 3044 elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC; 3045 } 3046 3047 switch (r_type) 3048 { 3049 case R_BFIN_GOTOFFHI: 3050 /* We need the addend to be applied before we shift the 3051 value right. */ 3052 relocation += rel->r_addend; 3053 /* Fall through. */ 3054 case R_BFIN_GOTHI: 3055 case R_BFIN_FUNCDESC_GOTHI: 3056 case R_BFIN_FUNCDESC_GOTOFFHI: 3057 relocation >>= 16; 3058 /* Fall through. */ 3059 3060 case R_BFIN_GOTLO: 3061 case R_BFIN_FUNCDESC_GOTLO: 3062 case R_BFIN_GOTOFFLO: 3063 case R_BFIN_FUNCDESC_GOTOFFLO: 3064 relocation &= 0xffff; 3065 break; 3066 3067 default: 3068 break; 3069 } 3070 3071 switch (r_type) 3072 { 3073 case R_BFIN_PCREL24: 3074 case R_BFIN_PCREL24_JUMP_L: 3075 if (! IS_FDPIC (output_bfd) || ! picrel->plt) 3076 break; 3077 /* Fall through. */ 3078 3079 /* When referencing a GOT entry, a function descriptor or a 3080 PLT, we don't want the addend to apply to the reference, 3081 but rather to the referenced symbol. The actual entry 3082 will have already been created taking the addend into 3083 account, so cancel it out here. */ 3084 case R_BFIN_GOT17M4: 3085 case R_BFIN_GOTHI: 3086 case R_BFIN_GOTLO: 3087 case R_BFIN_FUNCDESC_GOT17M4: 3088 case R_BFIN_FUNCDESC_GOTHI: 3089 case R_BFIN_FUNCDESC_GOTLO: 3090 case R_BFIN_FUNCDESC_GOTOFF17M4: 3091 case R_BFIN_FUNCDESC_GOTOFFHI: 3092 case R_BFIN_FUNCDESC_GOTOFFLO: 3093 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4 3094 here, since we do want to apply the addend to the others. 3095 Note that we've applied the addend to GOTOFFHI before we 3096 shifted it right. */ 3097 case R_BFIN_GOTOFFHI: 3098 relocation -= rel->r_addend; 3099 break; 3100 3101 default: 3102 break; 3103 } 3104 3105 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section, 3106 contents, rel->r_offset, 3107 relocation, rel->r_addend); 3108 3109 if (r != bfd_reloc_ok) 3110 { 3111 const char * msg = (const char *) NULL; 3112 3113 switch (r) 3114 { 3115 case bfd_reloc_overflow: 3116 (*info->callbacks->reloc_overflow) 3117 (info, (h ? &h->root : NULL), name, howto->name, 3118 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 3119 break; 3120 3121 case bfd_reloc_undefined: 3122 (*info->callbacks->undefined_symbol) 3123 (info, name, input_bfd, input_section, rel->r_offset, TRUE); 3124 break; 3125 3126 case bfd_reloc_outofrange: 3127 msg = _("internal error: out of range error"); 3128 break; 3129 3130 case bfd_reloc_notsupported: 3131 msg = _("internal error: unsupported relocation error"); 3132 break; 3133 3134 case bfd_reloc_dangerous: 3135 msg = _("internal error: dangerous relocation"); 3136 break; 3137 3138 default: 3139 msg = _("internal error: unknown error"); 3140 break; 3141 } 3142 3143 if (msg) 3144 (*info->callbacks->warning) (info, msg, name, input_bfd, 3145 input_section, rel->r_offset); 3146 } 3147 } 3148 3149 return TRUE; 3150 } 3151 3152 /* We need dynamic symbols for every section, since segments can 3153 relocate independently. */ 3154 static bfd_boolean 3155 _bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED, 3156 struct bfd_link_info *info ATTRIBUTE_UNUSED, 3157 asection *p) 3158 { 3159 switch (elf_section_data (p)->this_hdr.sh_type) 3160 { 3161 case SHT_PROGBITS: 3162 case SHT_NOBITS: 3163 /* If sh_type is yet undecided, assume it could be 3164 SHT_PROGBITS/SHT_NOBITS. */ 3165 case SHT_NULL: 3166 return FALSE; 3167 3168 /* There shouldn't be section relative relocations 3169 against any other section. */ 3170 default: 3171 return TRUE; 3172 } 3173 } 3174 3175 /* Create a .got section, as well as its additional info field. This 3176 is almost entirely copied from 3177 elflink.c:_bfd_elf_create_got_section(). */ 3178 3179 static bfd_boolean 3180 _bfin_create_got_section (bfd *abfd, struct bfd_link_info *info) 3181 { 3182 flagword flags, pltflags; 3183 asection *s; 3184 struct elf_link_hash_entry *h; 3185 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 3186 int ptralign; 3187 3188 /* This function may be called more than once. */ 3189 s = elf_hash_table (info)->sgot; 3190 if (s != NULL) 3191 return TRUE; 3192 3193 /* Machine specific: although pointers are 32-bits wide, we want the 3194 GOT to be aligned to a 64-bit boundary, such that function 3195 descriptors in it can be accessed with 64-bit loads and 3196 stores. */ 3197 ptralign = 3; 3198 3199 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 3200 | SEC_LINKER_CREATED); 3201 pltflags = flags; 3202 3203 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); 3204 elf_hash_table (info)->sgot = s; 3205 if (s == NULL 3206 || !bfd_set_section_alignment (s, ptralign)) 3207 return FALSE; 3208 3209 if (bed->want_got_sym) 3210 { 3211 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got 3212 (or .got.plt) section. We don't do this in the linker script 3213 because we don't want to define the symbol if we are not creating 3214 a global offset table. */ 3215 h = _bfd_elf_define_linkage_sym (abfd, info, s, "__GLOBAL_OFFSET_TABLE_"); 3216 elf_hash_table (info)->hgot = h; 3217 if (h == NULL) 3218 return FALSE; 3219 3220 /* Machine-specific: we want the symbol for executables as 3221 well. */ 3222 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 3223 return FALSE; 3224 } 3225 3226 /* The first bit of the global offset table is the header. */ 3227 s->size += bed->got_header_size; 3228 3229 /* This is the machine-specific part. Create and initialize section 3230 data for the got. */ 3231 if (IS_FDPIC (abfd)) 3232 { 3233 bfinfdpic_relocs_info (info) = htab_try_create (1, 3234 bfinfdpic_relocs_info_hash, 3235 bfinfdpic_relocs_info_eq, 3236 (htab_del) NULL); 3237 if (! bfinfdpic_relocs_info (info)) 3238 return FALSE; 3239 3240 s = bfd_make_section_anyway_with_flags (abfd, ".rel.got", 3241 (flags | SEC_READONLY)); 3242 if (s == NULL 3243 || !bfd_set_section_alignment (s, 2)) 3244 return FALSE; 3245 3246 bfinfdpic_gotrel_section (info) = s; 3247 3248 /* Machine-specific. */ 3249 s = bfd_make_section_anyway_with_flags (abfd, ".rofixup", 3250 (flags | SEC_READONLY)); 3251 if (s == NULL 3252 || !bfd_set_section_alignment (s, 2)) 3253 return FALSE; 3254 3255 bfinfdpic_gotfixup_section (info) = s; 3256 } 3257 3258 pltflags |= SEC_CODE; 3259 if (bed->plt_not_loaded) 3260 pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS); 3261 if (bed->plt_readonly) 3262 pltflags |= SEC_READONLY; 3263 3264 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); 3265 if (s == NULL 3266 || !bfd_set_section_alignment (s, bed->plt_alignment)) 3267 return FALSE; 3268 /* Blackfin-specific: remember it. */ 3269 bfinfdpic_plt_section (info) = s; 3270 3271 if (bed->want_plt_sym) 3272 { 3273 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the 3274 .plt section. */ 3275 struct bfd_link_hash_entry *bh = NULL; 3276 3277 if (! (_bfd_generic_link_add_one_symbol 3278 (info, abfd, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL, 3279 FALSE, get_elf_backend_data (abfd)->collect, &bh))) 3280 return FALSE; 3281 h = (struct elf_link_hash_entry *) bh; 3282 h->def_regular = 1; 3283 h->type = STT_OBJECT; 3284 3285 if (! bfd_link_executable (info) 3286 && ! bfd_elf_link_record_dynamic_symbol (info, h)) 3287 return FALSE; 3288 } 3289 3290 /* Blackfin-specific: we want rel relocations for the plt. */ 3291 s = bfd_make_section_anyway_with_flags (abfd, ".rel.plt", 3292 flags | SEC_READONLY); 3293 if (s == NULL 3294 || !bfd_set_section_alignment (s, bed->s->log_file_align)) 3295 return FALSE; 3296 /* Blackfin-specific: remember it. */ 3297 bfinfdpic_pltrel_section (info) = s; 3298 3299 return TRUE; 3300 } 3301 3302 /* Make sure the got and plt sections exist, and that our pointers in 3303 the link hash table point to them. */ 3304 3305 static bfd_boolean 3306 elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 3307 { 3308 /* This is mostly copied from 3309 elflink.c:_bfd_elf_create_dynamic_sections(). */ 3310 flagword flags; 3311 asection *s; 3312 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 3313 3314 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 3315 | SEC_LINKER_CREATED); 3316 3317 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and 3318 .rel[a].bss sections. */ 3319 3320 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */ 3321 if (! _bfin_create_got_section (abfd, info)) 3322 return FALSE; 3323 3324 /* Blackfin-specific: make sure we created everything we wanted. */ 3325 BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info) 3326 /* && bfinfdpic_gotfixup_section (info) */ 3327 && bfinfdpic_plt_section (info) 3328 && bfinfdpic_pltrel_section (info)); 3329 3330 if (bed->want_dynbss) 3331 { 3332 /* The .dynbss section is a place to put symbols which are defined 3333 by dynamic objects, are referenced by regular objects, and are 3334 not functions. We must allocate space for them in the process 3335 image and use a R_*_COPY reloc to tell the dynamic linker to 3336 initialize them at run time. The linker script puts the .dynbss 3337 section into the .bss section of the final image. */ 3338 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", 3339 SEC_ALLOC | SEC_LINKER_CREATED); 3340 if (s == NULL) 3341 return FALSE; 3342 3343 /* The .rel[a].bss section holds copy relocs. This section is not 3344 normally needed. We need to create it here, though, so that the 3345 linker will map it to an output section. We can't just create it 3346 only if we need it, because we will not know whether we need it 3347 until we have seen all the input files, and the first time the 3348 main linker code calls BFD after examining all the input files 3349 (size_dynamic_sections) the input sections have already been 3350 mapped to the output sections. If the section turns out not to 3351 be needed, we can discard it later. We will never need this 3352 section when generating a shared object, since they do not use 3353 copy relocs. */ 3354 if (! bfd_link_pic (info)) 3355 { 3356 s = bfd_make_section_anyway_with_flags (abfd, 3357 ".rela.bss", 3358 flags | SEC_READONLY); 3359 if (s == NULL 3360 || !bfd_set_section_alignment (s, bed->s->log_file_align)) 3361 return FALSE; 3362 } 3363 } 3364 3365 return TRUE; 3366 } 3367 3368 /* Compute the total GOT size required by each symbol in each range. 3369 Symbols may require up to 4 words in the GOT: an entry pointing to 3370 the symbol, an entry pointing to its function descriptor, and a 3371 private function descriptors taking two words. */ 3372 3373 static void 3374 _bfinfdpic_count_nontls_entries (struct bfinfdpic_relocs_info *entry, 3375 struct _bfinfdpic_dynamic_got_info *dinfo) 3376 { 3377 /* Allocate space for a GOT entry pointing to the symbol. */ 3378 if (entry->got17m4) 3379 dinfo->got17m4 += 4; 3380 else if (entry->gothilo) 3381 dinfo->gothilo += 4; 3382 else 3383 entry->relocs32--; 3384 entry->relocs32++; 3385 3386 /* Allocate space for a GOT entry pointing to the function 3387 descriptor. */ 3388 if (entry->fdgot17m4) 3389 dinfo->got17m4 += 4; 3390 else if (entry->fdgothilo) 3391 dinfo->gothilo += 4; 3392 else 3393 entry->relocsfd--; 3394 entry->relocsfd++; 3395 3396 /* Decide whether we need a PLT entry, a function descriptor in the 3397 GOT, and a lazy PLT entry for this symbol. */ 3398 entry->plt = entry->call 3399 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h) 3400 && elf_hash_table (dinfo->info)->dynamic_sections_created; 3401 entry->privfd = entry->plt 3402 || entry->fdgoff17m4 || entry->fdgoffhilo 3403 || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo) 3404 && (entry->symndx != -1 3405 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))); 3406 entry->lazyplt = entry->privfd 3407 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h) 3408 && ! (dinfo->info->flags & DF_BIND_NOW) 3409 && elf_hash_table (dinfo->info)->dynamic_sections_created; 3410 3411 /* Allocate space for a function descriptor. */ 3412 if (entry->fdgoff17m4) 3413 dinfo->fd17m4 += 8; 3414 else if (entry->privfd && entry->plt) 3415 dinfo->fdplt += 8; 3416 else if (entry->privfd) 3417 dinfo->fdhilo += 8; 3418 else 3419 entry->relocsfdv--; 3420 entry->relocsfdv++; 3421 3422 if (entry->lazyplt) 3423 dinfo->lzplt += LZPLT_NORMAL_SIZE; 3424 } 3425 3426 /* Compute the number of dynamic relocations and fixups that a symbol 3427 requires, and add (or subtract) from the grand and per-symbol 3428 totals. */ 3429 3430 static void 3431 _bfinfdpic_count_relocs_fixups (struct bfinfdpic_relocs_info *entry, 3432 struct _bfinfdpic_dynamic_got_info *dinfo, 3433 bfd_boolean subtract) 3434 { 3435 bfd_vma relocs = 0, fixups = 0; 3436 3437 if (!bfd_link_pde (dinfo->info)) 3438 relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv; 3439 else 3440 { 3441 if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)) 3442 { 3443 if (entry->symndx != -1 3444 || entry->d.h->root.type != bfd_link_hash_undefweak) 3445 fixups += entry->relocs32 + 2 * entry->relocsfdv; 3446 } 3447 else 3448 relocs += entry->relocs32 + entry->relocsfdv; 3449 3450 if (entry->symndx != -1 3451 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)) 3452 { 3453 if (entry->symndx != -1 3454 || entry->d.h->root.type != bfd_link_hash_undefweak) 3455 fixups += entry->relocsfd; 3456 } 3457 else 3458 relocs += entry->relocsfd; 3459 } 3460 3461 if (subtract) 3462 { 3463 relocs = - relocs; 3464 fixups = - fixups; 3465 } 3466 3467 entry->dynrelocs += relocs; 3468 entry->fixups += fixups; 3469 dinfo->relocs += relocs; 3470 dinfo->fixups += fixups; 3471 } 3472 3473 /* Compute the total GOT and PLT size required by each symbol in each range. * 3474 Symbols may require up to 4 words in the GOT: an entry pointing to 3475 the symbol, an entry pointing to its function descriptor, and a 3476 private function descriptors taking two words. */ 3477 3478 static int 3479 _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_) 3480 { 3481 struct bfinfdpic_relocs_info *entry = *entryp; 3482 struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_; 3483 3484 _bfinfdpic_count_nontls_entries (entry, dinfo); 3485 3486 _bfinfdpic_count_relocs_fixups (entry, dinfo, FALSE); 3487 3488 return 1; 3489 } 3490 3491 /* This structure is used to assign offsets to got entries, function 3492 descriptors, plt entries and lazy plt entries. */ 3493 3494 struct _bfinfdpic_dynamic_got_plt_info 3495 { 3496 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */ 3497 struct _bfinfdpic_dynamic_got_info g; 3498 3499 /* For each addressable range, we record a MAX (positive) and MIN 3500 (negative) value. CUR is used to assign got entries, and it's 3501 incremented from an initial positive value to MAX, then from MIN 3502 to FDCUR (unless FDCUR wraps around first). FDCUR is used to 3503 assign function descriptors, and it's decreased from an initial 3504 non-positive value to MIN, then from MAX down to CUR (unless CUR 3505 wraps around first). All of MIN, MAX, CUR and FDCUR always point 3506 to even words. ODD, if non-zero, indicates an odd word to be 3507 used for the next got entry, otherwise CUR is used and 3508 incremented by a pair of words, wrapping around when it reaches 3509 MAX. FDCUR is decremented (and wrapped) before the next function 3510 descriptor is chosen. FDPLT indicates the number of remaining 3511 slots that can be used for function descriptors used only by PLT 3512 entries. */ 3513 struct _bfinfdpic_dynamic_got_alloc_data 3514 { 3515 bfd_signed_vma max, cur, odd, fdcur, min; 3516 bfd_vma fdplt; 3517 } got17m4, gothilo; 3518 }; 3519 3520 /* Determine the positive and negative ranges to be used by each 3521 offset range in the GOT. FDCUR and CUR, that must be aligned to a 3522 double-word boundary, are the minimum (negative) and maximum 3523 (positive) GOT offsets already used by previous ranges, except for 3524 an ODD entry that may have been left behind. GOT and FD indicate 3525 the size of GOT entries and function descriptors that must be 3526 placed within the range from -WRAP to WRAP. If there's room left, 3527 up to FDPLT bytes should be reserved for additional function 3528 descriptors. */ 3529 3530 inline static bfd_signed_vma 3531 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad, 3532 bfd_signed_vma fdcur, 3533 bfd_signed_vma odd, 3534 bfd_signed_vma cur, 3535 bfd_vma got, 3536 bfd_vma fd, 3537 bfd_vma fdplt, 3538 bfd_vma wrap) 3539 { 3540 bfd_signed_vma wrapmin = -wrap; 3541 3542 /* Start at the given initial points. */ 3543 gad->fdcur = fdcur; 3544 gad->cur = cur; 3545 3546 /* If we had an incoming odd word and we have any got entries that 3547 are going to use it, consume it, otherwise leave gad->odd at 3548 zero. We might force gad->odd to zero and return the incoming 3549 odd such that it is used by the next range, but then GOT entries 3550 might appear to be out of order and we wouldn't be able to 3551 shorten the GOT by one word if it turns out to end with an 3552 unpaired GOT entry. */ 3553 if (odd && got) 3554 { 3555 gad->odd = odd; 3556 got -= 4; 3557 odd = 0; 3558 } 3559 else 3560 gad->odd = 0; 3561 3562 /* If we're left with an unpaired GOT entry, compute its location 3563 such that we can return it. Otherwise, if got doesn't require an 3564 odd number of words here, either odd was already zero in the 3565 block above, or it was set to zero because got was non-zero, or 3566 got was already zero. In the latter case, we want the value of 3567 odd to carry over to the return statement, so we don't want to 3568 reset odd unless the condition below is true. */ 3569 if (got & 4) 3570 { 3571 odd = cur + got; 3572 got += 4; 3573 } 3574 3575 /* Compute the tentative boundaries of this range. */ 3576 gad->max = cur + got; 3577 gad->min = fdcur - fd; 3578 gad->fdplt = 0; 3579 3580 /* If function descriptors took too much space, wrap some of them 3581 around. */ 3582 if (gad->min < wrapmin) 3583 { 3584 gad->max += wrapmin - gad->min; 3585 gad->min = wrapmin; 3586 } 3587 /* If there is space left and we have function descriptors 3588 referenced in PLT entries that could take advantage of shorter 3589 offsets, place them here. */ 3590 else if (fdplt && gad->min > wrapmin) 3591 { 3592 bfd_vma fds; 3593 if ((bfd_vma) (gad->min - wrapmin) < fdplt) 3594 fds = gad->min - wrapmin; 3595 else 3596 fds = fdplt; 3597 3598 fdplt -= fds; 3599 gad->min -= fds; 3600 gad->fdplt += fds; 3601 } 3602 3603 /* If GOT entries took too much space, wrap some of them around. 3604 This may well cause gad->min to become lower than wrapmin. This 3605 will cause a relocation overflow later on, so we don't have to 3606 report it here . */ 3607 if ((bfd_vma) gad->max > wrap) 3608 { 3609 gad->min -= gad->max - wrap; 3610 gad->max = wrap; 3611 } 3612 /* If there is more space left, try to place some more function 3613 descriptors for PLT entries. */ 3614 else if (fdplt && (bfd_vma) gad->max < wrap) 3615 { 3616 bfd_vma fds; 3617 if ((bfd_vma) (wrap - gad->max) < fdplt) 3618 fds = wrap - gad->max; 3619 else 3620 fds = fdplt; 3621 3622 fdplt -= fds; 3623 gad->max += fds; 3624 gad->fdplt += fds; 3625 } 3626 3627 /* If odd was initially computed as an offset past the wrap point, 3628 wrap it around. */ 3629 if (odd > gad->max) 3630 odd = gad->min + odd - gad->max; 3631 3632 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed 3633 before returning, so do it here too. This guarantees that, 3634 should cur and fdcur meet at the wrap point, they'll both be 3635 equal to min. */ 3636 if (gad->cur == gad->max) 3637 gad->cur = gad->min; 3638 3639 return odd; 3640 } 3641 3642 /* Compute the location of the next GOT entry, given the allocation 3643 data for a range. */ 3644 3645 inline static bfd_signed_vma 3646 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad) 3647 { 3648 bfd_signed_vma ret; 3649 3650 if (gad->odd) 3651 { 3652 /* If there was an odd word left behind, use it. */ 3653 ret = gad->odd; 3654 gad->odd = 0; 3655 } 3656 else 3657 { 3658 /* Otherwise, use the word pointed to by cur, reserve the next 3659 as an odd word, and skip to the next pair of words, possibly 3660 wrapping around. */ 3661 ret = gad->cur; 3662 gad->odd = gad->cur + 4; 3663 gad->cur += 8; 3664 if (gad->cur == gad->max) 3665 gad->cur = gad->min; 3666 } 3667 3668 return ret; 3669 } 3670 3671 /* Compute the location of the next function descriptor entry in the 3672 GOT, given the allocation data for a range. */ 3673 3674 inline static bfd_signed_vma 3675 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad) 3676 { 3677 /* If we're at the bottom, wrap around, and only then allocate the 3678 next pair of words. */ 3679 if (gad->fdcur == gad->min) 3680 gad->fdcur = gad->max; 3681 return gad->fdcur -= 8; 3682 } 3683 3684 /* Assign GOT offsets for every GOT entry and function descriptor. 3685 Doing everything in a single pass is tricky. */ 3686 3687 static int 3688 _bfinfdpic_assign_got_entries (void **entryp, void *info_) 3689 { 3690 struct bfinfdpic_relocs_info *entry = *entryp; 3691 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_; 3692 3693 if (entry->got17m4) 3694 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4); 3695 else if (entry->gothilo) 3696 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo); 3697 3698 if (entry->fdgot17m4) 3699 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4); 3700 else if (entry->fdgothilo) 3701 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo); 3702 3703 if (entry->fdgoff17m4) 3704 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4); 3705 else if (entry->plt && dinfo->got17m4.fdplt) 3706 { 3707 dinfo->got17m4.fdplt -= 8; 3708 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4); 3709 } 3710 else if (entry->plt) 3711 { 3712 dinfo->gothilo.fdplt -= 8; 3713 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo); 3714 } 3715 else if (entry->privfd) 3716 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo); 3717 3718 return 1; 3719 } 3720 3721 /* Assign GOT offsets to private function descriptors used by PLT 3722 entries (or referenced by 32-bit offsets), as well as PLT entries 3723 and lazy PLT entries. */ 3724 3725 static int 3726 _bfinfdpic_assign_plt_entries (void **entryp, void *info_) 3727 { 3728 struct bfinfdpic_relocs_info *entry = *entryp; 3729 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_; 3730 3731 /* If this symbol requires a local function descriptor, allocate 3732 one. */ 3733 if (entry->privfd && entry->fd_entry == 0) 3734 { 3735 if (dinfo->got17m4.fdplt) 3736 { 3737 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4); 3738 dinfo->got17m4.fdplt -= 8; 3739 } 3740 else 3741 { 3742 BFD_ASSERT (dinfo->gothilo.fdplt); 3743 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo); 3744 dinfo->gothilo.fdplt -= 8; 3745 } 3746 } 3747 3748 if (entry->plt) 3749 { 3750 int size; 3751 3752 /* We use the section's raw size to mark the location of the 3753 next PLT entry. */ 3754 entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size; 3755 3756 /* Figure out the length of this PLT entry based on the 3757 addressing mode we need to reach the function descriptor. */ 3758 BFD_ASSERT (entry->fd_entry); 3759 if (entry->fd_entry >= -(1 << (18 - 1)) 3760 && entry->fd_entry + 4 < (1 << (18 - 1))) 3761 size = 10; 3762 else 3763 size = 16; 3764 3765 bfinfdpic_plt_section (dinfo->g.info)->size += size; 3766 } 3767 3768 if (entry->lazyplt) 3769 { 3770 entry->lzplt_entry = dinfo->g.lzplt; 3771 dinfo->g.lzplt += LZPLT_NORMAL_SIZE; 3772 /* If this entry is the one that gets the resolver stub, account 3773 for the additional instruction. */ 3774 if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE 3775 == BFINFDPIC_LZPLT_RESOLV_LOC) 3776 dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA; 3777 } 3778 3779 return 1; 3780 } 3781 3782 /* Cancel out any effects of calling _bfinfdpic_assign_got_entries and 3783 _bfinfdpic_assign_plt_entries. */ 3784 3785 static int 3786 _bfinfdpic_reset_got_plt_entries (void **entryp, void *ignore ATTRIBUTE_UNUSED) 3787 { 3788 struct bfinfdpic_relocs_info *entry = *entryp; 3789 3790 entry->got_entry = 0; 3791 entry->fdgot_entry = 0; 3792 entry->fd_entry = 0; 3793 entry->plt_entry = (bfd_vma)-1; 3794 entry->lzplt_entry = (bfd_vma)-1; 3795 3796 return 1; 3797 } 3798 3799 /* Follow indirect and warning hash entries so that each got entry 3800 points to the final symbol definition. P must point to a pointer 3801 to the hash table we're traversing. Since this traversal may 3802 modify the hash table, we set this pointer to NULL to indicate 3803 we've made a potentially-destructive change to the hash table, so 3804 the traversal must be restarted. */ 3805 static int 3806 _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p) 3807 { 3808 struct bfinfdpic_relocs_info *entry = *entryp; 3809 htab_t *htab = p; 3810 3811 if (entry->symndx == -1) 3812 { 3813 struct elf_link_hash_entry *h = entry->d.h; 3814 struct bfinfdpic_relocs_info *oentry; 3815 3816 while (h->root.type == bfd_link_hash_indirect 3817 || h->root.type == bfd_link_hash_warning) 3818 h = (struct elf_link_hash_entry *)h->root.u.i.link; 3819 3820 if (entry->d.h == h) 3821 return 1; 3822 3823 oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend, 3824 NO_INSERT); 3825 3826 if (oentry) 3827 { 3828 /* Merge the two entries. */ 3829 bfinfdpic_pic_merge_early_relocs_info (oentry, entry); 3830 htab_clear_slot (*htab, entryp); 3831 return 1; 3832 } 3833 3834 entry->d.h = h; 3835 3836 /* If we can't find this entry with the new bfd hash, re-insert 3837 it, and get the traversal restarted. */ 3838 if (! htab_find (*htab, entry)) 3839 { 3840 htab_clear_slot (*htab, entryp); 3841 entryp = htab_find_slot (*htab, entry, INSERT); 3842 if (! *entryp) 3843 *entryp = entry; 3844 /* Abort the traversal, since the whole table may have 3845 moved, and leave it up to the parent to restart the 3846 process. */ 3847 *(htab_t *)p = NULL; 3848 return 0; 3849 } 3850 } 3851 3852 return 1; 3853 } 3854 3855 /* Compute the total size of the GOT, the PLT, the dynamic relocations 3856 section and the rofixup section. Assign locations for GOT and PLT 3857 entries. */ 3858 3859 static bfd_boolean 3860 _bfinfdpic_size_got_plt (bfd *output_bfd, 3861 struct _bfinfdpic_dynamic_got_plt_info *gpinfop) 3862 { 3863 bfd_signed_vma odd; 3864 bfd_vma limit; 3865 struct bfd_link_info *info = gpinfop->g.info; 3866 bfd *dynobj = elf_hash_table (info)->dynobj; 3867 3868 memcpy (bfinfdpic_dynamic_got_plt_info (info), &gpinfop->g, 3869 sizeof (gpinfop->g)); 3870 3871 odd = 12; 3872 /* Compute the total size taken by entries in the 18-bit range, 3873 to tell how many PLT function descriptors we can bring into it 3874 without causing it to overflow. */ 3875 limit = odd + gpinfop->g.got17m4 + gpinfop->g.fd17m4; 3876 if (limit < (bfd_vma)1 << 18) 3877 limit = ((bfd_vma)1 << 18) - limit; 3878 else 3879 limit = 0; 3880 if (gpinfop->g.fdplt < limit) 3881 limit = gpinfop->g.fdplt; 3882 3883 /* Determine the ranges of GOT offsets that we can use for each 3884 range of addressing modes. */ 3885 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->got17m4, 3886 0, 3887 odd, 3888 16, 3889 gpinfop->g.got17m4, 3890 gpinfop->g.fd17m4, 3891 limit, 3892 (bfd_vma)1 << (18-1)); 3893 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->gothilo, 3894 gpinfop->got17m4.min, 3895 odd, 3896 gpinfop->got17m4.max, 3897 gpinfop->g.gothilo, 3898 gpinfop->g.fdhilo, 3899 gpinfop->g.fdplt - gpinfop->got17m4.fdplt, 3900 (bfd_vma)1 << (32-1)); 3901 3902 /* Now assign (most) GOT offsets. */ 3903 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries, 3904 gpinfop); 3905 3906 bfinfdpic_got_section (info)->size = gpinfop->gothilo.max 3907 - gpinfop->gothilo.min 3908 /* If an odd word is the last word of the GOT, we don't need this 3909 word to be part of the GOT. */ 3910 - (odd + 4 == gpinfop->gothilo.max ? 4 : 0); 3911 if (bfinfdpic_got_section (info)->size == 0) 3912 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE; 3913 else if (bfinfdpic_got_section (info)->size == 12 3914 && ! elf_hash_table (info)->dynamic_sections_created) 3915 { 3916 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE; 3917 bfinfdpic_got_section (info)->size = 0; 3918 } 3919 else 3920 { 3921 bfinfdpic_got_section (info)->contents = 3922 (bfd_byte *) bfd_zalloc (dynobj, 3923 bfinfdpic_got_section (info)->size); 3924 if (bfinfdpic_got_section (info)->contents == NULL) 3925 return FALSE; 3926 } 3927 3928 if (elf_hash_table (info)->dynamic_sections_created) 3929 /* Subtract the number of lzplt entries, since those will generate 3930 relocations in the pltrel section. */ 3931 bfinfdpic_gotrel_section (info)->size = 3932 (gpinfop->g.relocs - gpinfop->g.lzplt / LZPLT_NORMAL_SIZE) 3933 * get_elf_backend_data (output_bfd)->s->sizeof_rel; 3934 else 3935 BFD_ASSERT (gpinfop->g.relocs == 0); 3936 if (bfinfdpic_gotrel_section (info)->size == 0) 3937 bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE; 3938 else 3939 { 3940 bfinfdpic_gotrel_section (info)->contents = 3941 (bfd_byte *) bfd_zalloc (dynobj, 3942 bfinfdpic_gotrel_section (info)->size); 3943 if (bfinfdpic_gotrel_section (info)->contents == NULL) 3944 return FALSE; 3945 } 3946 3947 bfinfdpic_gotfixup_section (info)->size = (gpinfop->g.fixups + 1) * 4; 3948 if (bfinfdpic_gotfixup_section (info)->size == 0) 3949 bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE; 3950 else 3951 { 3952 bfinfdpic_gotfixup_section (info)->contents = 3953 (bfd_byte *) bfd_zalloc (dynobj, 3954 bfinfdpic_gotfixup_section (info)->size); 3955 if (bfinfdpic_gotfixup_section (info)->contents == NULL) 3956 return FALSE; 3957 } 3958 3959 if (elf_hash_table (info)->dynamic_sections_created) 3960 bfinfdpic_pltrel_section (info)->size = 3961 gpinfop->g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel; 3962 if (bfinfdpic_pltrel_section (info)->size == 0) 3963 bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE; 3964 else 3965 { 3966 bfinfdpic_pltrel_section (info)->contents = 3967 (bfd_byte *) bfd_zalloc (dynobj, 3968 bfinfdpic_pltrel_section (info)->size); 3969 if (bfinfdpic_pltrel_section (info)->contents == NULL) 3970 return FALSE; 3971 } 3972 3973 /* Add 4 bytes for every block of at most 65535 lazy PLT entries, 3974 such that there's room for the additional instruction needed to 3975 call the resolver. Since _bfinfdpic_assign_got_entries didn't 3976 account for them, our block size is 4 bytes smaller than the real 3977 block size. */ 3978 if (elf_hash_table (info)->dynamic_sections_created) 3979 { 3980 bfinfdpic_plt_section (info)->size = gpinfop->g.lzplt 3981 + ((gpinfop->g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE) 3982 / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA); 3983 } 3984 3985 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to 3986 actually assign lazy PLT entries addresses. */ 3987 gpinfop->g.lzplt = 0; 3988 3989 /* Save information that we're going to need to generate GOT and PLT 3990 entries. */ 3991 bfinfdpic_got_initial_offset (info) = -gpinfop->gothilo.min; 3992 3993 if (get_elf_backend_data (output_bfd)->want_got_sym) 3994 elf_hash_table (info)->hgot->root.u.def.value 3995 = bfinfdpic_got_initial_offset (info); 3996 3997 if (elf_hash_table (info)->dynamic_sections_created) 3998 bfinfdpic_plt_initial_offset (info) = 3999 bfinfdpic_plt_section (info)->size; 4000 4001 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries, 4002 gpinfop); 4003 4004 /* Allocate the PLT section contents only after 4005 _bfinfdpic_assign_plt_entries has a chance to add the size of the 4006 non-lazy PLT entries. */ 4007 if (bfinfdpic_plt_section (info)->size == 0) 4008 bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE; 4009 else 4010 { 4011 bfinfdpic_plt_section (info)->contents = 4012 (bfd_byte *) bfd_zalloc (dynobj, 4013 bfinfdpic_plt_section (info)->size); 4014 if (bfinfdpic_plt_section (info)->contents == NULL) 4015 return FALSE; 4016 } 4017 4018 return TRUE; 4019 } 4020 4021 /* Set the sizes of the dynamic sections. */ 4022 4023 static bfd_boolean 4024 elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd, 4025 struct bfd_link_info *info) 4026 { 4027 struct elf_link_hash_table *htab; 4028 bfd *dynobj; 4029 asection *s; 4030 struct _bfinfdpic_dynamic_got_plt_info gpinfo; 4031 4032 htab = elf_hash_table (info); 4033 dynobj = htab->dynobj; 4034 BFD_ASSERT (dynobj != NULL); 4035 4036 if (htab->dynamic_sections_created) 4037 { 4038 /* Set the contents of the .interp section to the interpreter. */ 4039 if (bfd_link_executable (info) && !info->nointerp) 4040 { 4041 s = bfd_get_linker_section (dynobj, ".interp"); 4042 BFD_ASSERT (s != NULL); 4043 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 4044 s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER; 4045 } 4046 } 4047 4048 memset (&gpinfo, 0, sizeof (gpinfo)); 4049 gpinfo.g.info = info; 4050 4051 for (;;) 4052 { 4053 htab_t relocs = bfinfdpic_relocs_info (info); 4054 4055 htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs); 4056 4057 if (relocs == bfinfdpic_relocs_info (info)) 4058 break; 4059 } 4060 4061 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries, 4062 &gpinfo.g); 4063 4064 /* Allocate space to save the summary information, we're going to 4065 use it if we're doing relaxations. */ 4066 bfinfdpic_dynamic_got_plt_info (info) = bfd_alloc (dynobj, sizeof (gpinfo.g)); 4067 4068 if (!_bfinfdpic_size_got_plt (output_bfd, &gpinfo)) 4069 return FALSE; 4070 4071 s = bfd_get_linker_section (dynobj, ".dynbss"); 4072 if (s && s->size == 0) 4073 s->flags |= SEC_EXCLUDE; 4074 4075 s = bfd_get_linker_section (dynobj, ".rela.bss"); 4076 if (s && s->size == 0) 4077 s->flags |= SEC_EXCLUDE; 4078 4079 return _bfd_elf_add_dynamic_tags (output_bfd, info, TRUE); 4080 } 4081 4082 static bfd_boolean 4083 elf32_bfinfdpic_always_size_sections (bfd *output_bfd, 4084 struct bfd_link_info *info) 4085 { 4086 if (!bfd_link_relocatable (info) 4087 && !bfd_elf_stack_segment_size (output_bfd, info, 4088 "__stacksize", DEFAULT_STACK_SIZE)) 4089 return FALSE; 4090 4091 return TRUE; 4092 } 4093 4094 /* Check whether any of the relocations was optimized away, and 4095 subtract it from the relocation or fixup count. */ 4096 static bfd_boolean 4097 _bfinfdpic_check_discarded_relocs (bfd *abfd, asection *sec, 4098 struct bfd_link_info *info, 4099 bfd_boolean *changed) 4100 { 4101 Elf_Internal_Shdr *symtab_hdr; 4102 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; 4103 Elf_Internal_Rela *rel, *erel; 4104 4105 if ((sec->flags & SEC_RELOC) == 0 4106 || sec->reloc_count == 0) 4107 return TRUE; 4108 4109 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 4110 sym_hashes = elf_sym_hashes (abfd); 4111 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym); 4112 if (!elf_bad_symtab (abfd)) 4113 sym_hashes_end -= symtab_hdr->sh_info; 4114 4115 rel = elf_section_data (sec)->relocs; 4116 4117 /* Now examine each relocation. */ 4118 for (erel = rel + sec->reloc_count; rel < erel; rel++) 4119 { 4120 struct elf_link_hash_entry *h; 4121 unsigned long r_symndx; 4122 struct bfinfdpic_relocs_info *picrel; 4123 struct _bfinfdpic_dynamic_got_info *dinfo; 4124 4125 if (ELF32_R_TYPE (rel->r_info) != R_BFIN_BYTE4_DATA 4126 && ELF32_R_TYPE (rel->r_info) != R_BFIN_FUNCDESC) 4127 continue; 4128 4129 if (_bfd_elf_section_offset (sec->output_section->owner, 4130 info, sec, rel->r_offset) 4131 != (bfd_vma)-1) 4132 continue; 4133 4134 r_symndx = ELF32_R_SYM (rel->r_info); 4135 if (r_symndx < symtab_hdr->sh_info) 4136 h = NULL; 4137 else 4138 { 4139 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 4140 while (h->root.type == bfd_link_hash_indirect 4141 || h->root.type == bfd_link_hash_warning) 4142 h = (struct elf_link_hash_entry *)h->root.u.i.link; 4143 } 4144 4145 if (h != NULL) 4146 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info), 4147 abfd, h, 4148 rel->r_addend, NO_INSERT); 4149 else 4150 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info (info), 4151 abfd, r_symndx, 4152 rel->r_addend, NO_INSERT); 4153 4154 if (! picrel) 4155 return FALSE; 4156 4157 *changed = TRUE; 4158 dinfo = bfinfdpic_dynamic_got_plt_info (info); 4159 4160 _bfinfdpic_count_relocs_fixups (picrel, dinfo, TRUE); 4161 if (ELF32_R_TYPE (rel->r_info) == R_BFIN_BYTE4_DATA) 4162 picrel->relocs32--; 4163 else /* we know (ELF32_R_TYPE (rel->r_info) == R_BFIN_FUNCDESC) */ 4164 picrel->relocsfd--; 4165 _bfinfdpic_count_relocs_fixups (picrel, dinfo, FALSE); 4166 } 4167 4168 return TRUE; 4169 } 4170 4171 static bfd_boolean 4172 bfinfdpic_elf_discard_info (bfd *ibfd, 4173 struct elf_reloc_cookie *cookie ATTRIBUTE_UNUSED, 4174 struct bfd_link_info *info) 4175 { 4176 bfd_boolean changed = FALSE; 4177 asection *s; 4178 bfd *obfd = NULL; 4179 4180 /* Account for relaxation of .eh_frame section. */ 4181 for (s = ibfd->sections; s; s = s->next) 4182 if (s->sec_info_type == SEC_INFO_TYPE_EH_FRAME) 4183 { 4184 if (!_bfinfdpic_check_discarded_relocs (ibfd, s, info, &changed)) 4185 return FALSE; 4186 obfd = s->output_section->owner; 4187 } 4188 4189 if (changed) 4190 { 4191 struct _bfinfdpic_dynamic_got_plt_info gpinfo; 4192 4193 memset (&gpinfo, 0, sizeof (gpinfo)); 4194 memcpy (&gpinfo.g, bfinfdpic_dynamic_got_plt_info (info), 4195 sizeof (gpinfo.g)); 4196 4197 /* Clear GOT and PLT assignments. */ 4198 htab_traverse (bfinfdpic_relocs_info (info), 4199 _bfinfdpic_reset_got_plt_entries, 4200 NULL); 4201 4202 if (!_bfinfdpic_size_got_plt (obfd, &gpinfo)) 4203 return FALSE; 4204 } 4205 4206 return TRUE; 4207 } 4208 4209 static bfd_boolean 4210 elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd, 4211 struct bfd_link_info *info) 4212 { 4213 bfd *dynobj; 4214 asection *sdyn; 4215 4216 dynobj = elf_hash_table (info)->dynobj; 4217 4218 if (bfinfdpic_got_section (info)) 4219 { 4220 BFD_ASSERT (bfinfdpic_gotrel_section (info)->size 4221 /* PR 17334: It appears that the GOT section can end up 4222 being bigger than the number of relocs. Presumably 4223 because some relocs have been deleted. A test case has 4224 yet to be generated for verify this, but in the meantime 4225 the test below has been changed from == to >= so that 4226 applications can continue to be built. */ 4227 >= (bfinfdpic_gotrel_section (info)->reloc_count 4228 * sizeof (Elf32_External_Rel))); 4229 4230 if (bfinfdpic_gotfixup_section (info)) 4231 { 4232 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot; 4233 bfd_vma got_value = hgot->root.u.def.value 4234 + hgot->root.u.def.section->output_section->vma 4235 + hgot->root.u.def.section->output_offset; 4236 4237 _bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info), 4238 got_value, 0); 4239 4240 if (bfinfdpic_gotfixup_section (info)->size 4241 != (bfinfdpic_gotfixup_section (info)->reloc_count * 4)) 4242 { 4243 _bfd_error_handler 4244 ("LINKER BUG: .rofixup section size mismatch"); 4245 return FALSE; 4246 } 4247 } 4248 } 4249 if (elf_hash_table (info)->dynamic_sections_created) 4250 { 4251 BFD_ASSERT (bfinfdpic_pltrel_section (info)->size 4252 == (bfinfdpic_pltrel_section (info)->reloc_count 4253 * sizeof (Elf32_External_Rel))); 4254 } 4255 4256 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 4257 4258 if (elf_hash_table (info)->dynamic_sections_created) 4259 { 4260 Elf32_External_Dyn * dyncon; 4261 Elf32_External_Dyn * dynconend; 4262 4263 BFD_ASSERT (sdyn != NULL); 4264 4265 dyncon = (Elf32_External_Dyn *) sdyn->contents; 4266 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 4267 4268 for (; dyncon < dynconend; dyncon++) 4269 { 4270 Elf_Internal_Dyn dyn; 4271 4272 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 4273 4274 switch (dyn.d_tag) 4275 { 4276 default: 4277 break; 4278 4279 case DT_PLTGOT: 4280 dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma 4281 + bfinfdpic_got_section (info)->output_offset 4282 + bfinfdpic_got_initial_offset (info); 4283 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 4284 break; 4285 4286 case DT_JMPREL: 4287 dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info) 4288 ->output_section->vma 4289 + bfinfdpic_pltrel_section (info)->output_offset; 4290 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 4291 break; 4292 4293 case DT_PLTRELSZ: 4294 dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size; 4295 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 4296 break; 4297 } 4298 } 4299 } 4300 4301 return TRUE; 4302 } 4303 4304 /* Adjust a symbol defined by a dynamic object and referenced by a 4305 regular object. */ 4306 4307 static bfd_boolean 4308 elf32_bfinfdpic_adjust_dynamic_symbol (struct bfd_link_info *info, 4309 struct elf_link_hash_entry *h) 4310 { 4311 bfd * dynobj; 4312 4313 dynobj = elf_hash_table (info)->dynobj; 4314 4315 /* Make sure we know what is going on here. */ 4316 BFD_ASSERT (dynobj != NULL 4317 && (h->is_weakalias 4318 || (h->def_dynamic 4319 && h->ref_regular 4320 && !h->def_regular))); 4321 4322 /* If this is a weak symbol, and there is a real definition, the 4323 processor independent code will have arranged for us to see the 4324 real definition first, and we can just use the same value. */ 4325 if (h->is_weakalias) 4326 { 4327 struct elf_link_hash_entry *def = weakdef (h); 4328 BFD_ASSERT (def->root.type == bfd_link_hash_defined); 4329 h->root.u.def.section = def->root.u.def.section; 4330 h->root.u.def.value = def->root.u.def.value; 4331 } 4332 4333 return TRUE; 4334 } 4335 4336 /* Perform any actions needed for dynamic symbols. */ 4337 4338 static bfd_boolean 4339 elf32_bfinfdpic_finish_dynamic_symbol 4340 (bfd *output_bfd ATTRIBUTE_UNUSED, 4341 struct bfd_link_info *info ATTRIBUTE_UNUSED, 4342 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED, 4343 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED) 4344 { 4345 return TRUE; 4346 } 4347 4348 /* Decide whether to attempt to turn absptr or lsda encodings in 4349 shared libraries into pcrel within the given input section. */ 4350 4351 static bfd_boolean 4352 bfinfdpic_elf_use_relative_eh_frame 4353 (bfd *input_bfd ATTRIBUTE_UNUSED, 4354 struct bfd_link_info *info ATTRIBUTE_UNUSED, 4355 asection *eh_frame_section ATTRIBUTE_UNUSED) 4356 { 4357 /* We can't use PC-relative encodings in FDPIC binaries, in general. */ 4358 return FALSE; 4359 } 4360 4361 /* Adjust the contents of an eh_frame_hdr section before they're output. */ 4362 4363 static bfd_byte 4364 bfinfdpic_elf_encode_eh_address (bfd *abfd, 4365 struct bfd_link_info *info, 4366 asection *osec, bfd_vma offset, 4367 asection *loc_sec, bfd_vma loc_offset, 4368 bfd_vma *encoded) 4369 { 4370 struct elf_link_hash_entry *h; 4371 4372 h = elf_hash_table (info)->hgot; 4373 BFD_ASSERT (h && h->root.type == bfd_link_hash_defined); 4374 4375 if (! h || (_bfinfdpic_osec_to_segment (abfd, osec) 4376 == _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section))) 4377 return _bfd_elf_encode_eh_address (abfd, info, osec, offset, 4378 loc_sec, loc_offset, encoded); 4379 4380 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec) 4381 == (_bfinfdpic_osec_to_segment 4382 (abfd, h->root.u.def.section->output_section))); 4383 4384 *encoded = osec->vma + offset 4385 - (h->root.u.def.value 4386 + h->root.u.def.section->output_section->vma 4387 + h->root.u.def.section->output_offset); 4388 4389 return DW_EH_PE_datarel | DW_EH_PE_sdata4; 4390 } 4391 4392 4393 4394 /* Look through the relocs for a section during the first phase. 4395 4396 Besides handling virtual table relocs for gc, we have to deal with 4397 all sorts of PIC-related relocations. We describe below the 4398 general plan on how to handle such relocations, even though we only 4399 collect information at this point, storing them in hash tables for 4400 perusal of later passes. 4401 4402 32 relocations are propagated to the linker output when creating 4403 position-independent output. LO16 and HI16 relocations are not 4404 supposed to be encountered in this case. 4405 4406 LABEL16 should always be resolvable by the linker, since it's only 4407 used by branches. 4408 4409 LABEL24, on the other hand, is used by calls. If it turns out that 4410 the target of a call is a dynamic symbol, a PLT entry must be 4411 created for it, which triggers the creation of a private function 4412 descriptor and, unless lazy binding is disabled, a lazy PLT entry. 4413 4414 GPREL relocations require the referenced symbol to be in the same 4415 segment as _gp, but this can only be checked later. 4416 4417 All GOT, GOTOFF and FUNCDESC relocations require a .got section to 4418 exist. LABEL24 might as well, since it may require a PLT entry, 4419 that will require a got. 4420 4421 Non-FUNCDESC GOT relocations require a GOT entry to be created 4422 regardless of whether the symbol is dynamic. However, since a 4423 global symbol that turns out to not be exported may have the same 4424 address of a non-dynamic symbol, we don't assign GOT entries at 4425 this point, such that we can share them in this case. A relocation 4426 for the GOT entry always has to be created, be it to offset a 4427 private symbol by the section load address, be it to get the symbol 4428 resolved dynamically. 4429 4430 FUNCDESC GOT relocations require a GOT entry to be created, and 4431 handled as if a FUNCDESC relocation was applied to the GOT entry in 4432 an object file. 4433 4434 FUNCDESC relocations referencing a symbol that turns out to NOT be 4435 dynamic cause a private function descriptor to be created. The 4436 FUNCDESC relocation then decays to a 32 relocation that points at 4437 the private descriptor. If the symbol is dynamic, the FUNCDESC 4438 relocation is propagated to the linker output, such that the 4439 dynamic linker creates the canonical descriptor, pointing to the 4440 dynamically-resolved definition of the function. 4441 4442 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic 4443 symbols that are assigned to the same segment as the GOT, but we 4444 can only check this later, after we know the complete set of 4445 symbols defined and/or exported. 4446 4447 FUNCDESC GOTOFF relocations require a function descriptor to be 4448 created and, unless lazy binding is disabled or the symbol is not 4449 dynamic, a lazy PLT entry. Since we can't tell at this point 4450 whether a symbol is going to be dynamic, we have to decide later 4451 whether to create a lazy PLT entry or bind the descriptor directly 4452 to the private function. 4453 4454 FUNCDESC_VALUE relocations are not supposed to be present in object 4455 files, but they may very well be simply propagated to the linker 4456 output, since they have no side effect. 4457 4458 4459 A function descriptor always requires a FUNCDESC_VALUE relocation. 4460 Whether it's in .plt.rel or not depends on whether lazy binding is 4461 enabled and on whether the referenced symbol is dynamic. 4462 4463 The existence of a lazy PLT requires the resolverStub lazy PLT 4464 entry to be present. 4465 4466 4467 As for assignment of GOT, PLT and lazy PLT entries, and private 4468 descriptors, we might do them all sequentially, but we can do 4469 better than that. For example, we can place GOT entries and 4470 private function descriptors referenced using 12-bit operands 4471 closer to the PIC register value, such that these relocations don't 4472 overflow. Those that are only referenced with LO16 relocations 4473 could come next, but we may as well place PLT-required function 4474 descriptors in the 12-bit range to make them shorter. Symbols 4475 referenced with LO16/HI16 may come next, but we may place 4476 additional function descriptors in the 16-bit range if we can 4477 reliably tell that we've already placed entries that are ever 4478 referenced with only LO16. PLT entries are therefore generated as 4479 small as possible, while not introducing relocation overflows in 4480 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be 4481 generated before or after PLT entries, but not intermingled with 4482 them, such that we can have more lazy PLT entries in range for a 4483 branch to the resolverStub. The resolverStub should be emitted at 4484 the most distant location from the first lazy PLT entry such that 4485 it's still in range for a branch, or closer, if there isn't a need 4486 for so many lazy PLT entries. Additional lazy PLT entries may be 4487 emitted after the resolverStub, as long as branches are still in 4488 range. If the branch goes out of range, longer lazy PLT entries 4489 are emitted. 4490 4491 We could further optimize PLT and lazy PLT entries by giving them 4492 priority in assignment to closer-to-gr17 locations depending on the 4493 number of occurrences of references to them (assuming a function 4494 that's called more often is more important for performance, so its 4495 PLT entry should be faster), or taking hints from the compiler. 4496 Given infinite time and money... :-) */ 4497 4498 static bfd_boolean 4499 bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info, 4500 asection *sec, const Elf_Internal_Rela *relocs) 4501 { 4502 Elf_Internal_Shdr *symtab_hdr; 4503 struct elf_link_hash_entry **sym_hashes; 4504 const Elf_Internal_Rela *rel; 4505 const Elf_Internal_Rela *rel_end; 4506 bfd *dynobj; 4507 struct bfinfdpic_relocs_info *picrel; 4508 4509 if (bfd_link_relocatable (info)) 4510 return TRUE; 4511 4512 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 4513 sym_hashes = elf_sym_hashes (abfd); 4514 4515 dynobj = elf_hash_table (info)->dynobj; 4516 rel_end = relocs + sec->reloc_count; 4517 for (rel = relocs; rel < rel_end; rel++) 4518 { 4519 struct elf_link_hash_entry *h; 4520 unsigned long r_symndx; 4521 4522 r_symndx = ELF32_R_SYM (rel->r_info); 4523 if (r_symndx < symtab_hdr->sh_info) 4524 h = NULL; 4525 else 4526 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 4527 4528 switch (ELF32_R_TYPE (rel->r_info)) 4529 { 4530 case R_BFIN_GOT17M4: 4531 case R_BFIN_GOTHI: 4532 case R_BFIN_GOTLO: 4533 case R_BFIN_FUNCDESC_GOT17M4: 4534 case R_BFIN_FUNCDESC_GOTHI: 4535 case R_BFIN_FUNCDESC_GOTLO: 4536 case R_BFIN_GOTOFF17M4: 4537 case R_BFIN_GOTOFFHI: 4538 case R_BFIN_GOTOFFLO: 4539 case R_BFIN_FUNCDESC_GOTOFF17M4: 4540 case R_BFIN_FUNCDESC_GOTOFFHI: 4541 case R_BFIN_FUNCDESC_GOTOFFLO: 4542 case R_BFIN_FUNCDESC: 4543 case R_BFIN_FUNCDESC_VALUE: 4544 if (! IS_FDPIC (abfd)) 4545 goto bad_reloc; 4546 /* Fall through. */ 4547 case R_BFIN_PCREL24: 4548 case R_BFIN_PCREL24_JUMP_L: 4549 case R_BFIN_BYTE4_DATA: 4550 if (IS_FDPIC (abfd) && ! dynobj) 4551 { 4552 elf_hash_table (info)->dynobj = dynobj = abfd; 4553 if (! _bfin_create_got_section (abfd, info)) 4554 return FALSE; 4555 } 4556 if (! IS_FDPIC (abfd)) 4557 { 4558 picrel = NULL; 4559 break; 4560 } 4561 if (h != NULL) 4562 { 4563 if (h->dynindx == -1) 4564 switch (ELF_ST_VISIBILITY (h->other)) 4565 { 4566 case STV_INTERNAL: 4567 case STV_HIDDEN: 4568 break; 4569 default: 4570 bfd_elf_link_record_dynamic_symbol (info, h); 4571 break; 4572 } 4573 picrel 4574 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info), 4575 abfd, h, 4576 rel->r_addend, INSERT); 4577 } 4578 else 4579 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info 4580 (info), abfd, r_symndx, 4581 rel->r_addend, INSERT); 4582 if (! picrel) 4583 return FALSE; 4584 break; 4585 4586 default: 4587 picrel = NULL; 4588 break; 4589 } 4590 4591 switch (ELF32_R_TYPE (rel->r_info)) 4592 { 4593 case R_BFIN_PCREL24: 4594 case R_BFIN_PCREL24_JUMP_L: 4595 if (IS_FDPIC (abfd)) 4596 picrel->call++; 4597 break; 4598 4599 case R_BFIN_FUNCDESC_VALUE: 4600 picrel->relocsfdv++; 4601 if (bfd_section_flags (sec) & SEC_ALLOC) 4602 picrel->relocs32--; 4603 /* Fall through. */ 4604 4605 case R_BFIN_BYTE4_DATA: 4606 if (! IS_FDPIC (abfd)) 4607 break; 4608 4609 picrel->sym++; 4610 if (bfd_section_flags (sec) & SEC_ALLOC) 4611 picrel->relocs32++; 4612 break; 4613 4614 case R_BFIN_GOT17M4: 4615 picrel->got17m4++; 4616 break; 4617 4618 case R_BFIN_GOTHI: 4619 case R_BFIN_GOTLO: 4620 picrel->gothilo++; 4621 break; 4622 4623 case R_BFIN_FUNCDESC_GOT17M4: 4624 picrel->fdgot17m4++; 4625 break; 4626 4627 case R_BFIN_FUNCDESC_GOTHI: 4628 case R_BFIN_FUNCDESC_GOTLO: 4629 picrel->fdgothilo++; 4630 break; 4631 4632 case R_BFIN_GOTOFF17M4: 4633 case R_BFIN_GOTOFFHI: 4634 case R_BFIN_GOTOFFLO: 4635 picrel->gotoff++; 4636 break; 4637 4638 case R_BFIN_FUNCDESC_GOTOFF17M4: 4639 picrel->fdgoff17m4++; 4640 break; 4641 4642 case R_BFIN_FUNCDESC_GOTOFFHI: 4643 case R_BFIN_FUNCDESC_GOTOFFLO: 4644 picrel->fdgoffhilo++; 4645 break; 4646 4647 case R_BFIN_FUNCDESC: 4648 picrel->fd++; 4649 picrel->relocsfd++; 4650 break; 4651 4652 /* This relocation describes the C++ object vtable hierarchy. 4653 Reconstruct it for later use during GC. */ 4654 case R_BFIN_GNU_VTINHERIT: 4655 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 4656 return FALSE; 4657 break; 4658 4659 /* This relocation describes which C++ vtable entries are actually 4660 used. Record for later use during GC. */ 4661 case R_BFIN_GNU_VTENTRY: 4662 BFD_ASSERT (h != NULL); 4663 if (h != NULL 4664 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 4665 return FALSE; 4666 break; 4667 4668 case R_BFIN_HUIMM16: 4669 case R_BFIN_LUIMM16: 4670 case R_BFIN_PCREL12_JUMP_S: 4671 case R_BFIN_PCREL10: 4672 break; 4673 4674 default: 4675 bad_reloc: 4676 _bfd_error_handler 4677 /* xgettext:c-format */ 4678 (_("%pB: unsupported relocation type %#x"), 4679 abfd, (int) ELF32_R_TYPE (rel->r_info)); 4680 return FALSE; 4681 } 4682 } 4683 4684 return TRUE; 4685 } 4686 4687 /* Set the right machine number for a Blackfin ELF file. */ 4688 4689 static bfd_boolean 4690 elf32_bfin_object_p (bfd *abfd) 4691 { 4692 bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0); 4693 return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0) 4694 == (IS_FDPIC (abfd))); 4695 } 4696 4697 static bfd_boolean 4698 elf32_bfin_set_private_flags (bfd * abfd, flagword flags) 4699 { 4700 elf_elfheader (abfd)->e_flags = flags; 4701 elf_flags_init (abfd) = TRUE; 4702 return TRUE; 4703 } 4704 4705 /* Display the flags field. */ 4706 static bfd_boolean 4707 elf32_bfin_print_private_bfd_data (bfd * abfd, void * ptr) 4708 { 4709 FILE *file = (FILE *) ptr; 4710 flagword flags; 4711 4712 BFD_ASSERT (abfd != NULL && ptr != NULL); 4713 4714 /* Print normal ELF private data. */ 4715 _bfd_elf_print_private_bfd_data (abfd, ptr); 4716 4717 flags = elf_elfheader (abfd)->e_flags; 4718 4719 /* xgettext:c-format */ 4720 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); 4721 4722 if (flags & EF_BFIN_PIC) 4723 fprintf (file, " -fpic"); 4724 4725 if (flags & EF_BFIN_FDPIC) 4726 fprintf (file, " -mfdpic"); 4727 4728 fputc ('\n', file); 4729 4730 return TRUE; 4731 } 4732 4733 /* Merge backend specific data from an object file to the output 4734 object file when linking. */ 4735 4736 static bfd_boolean 4737 elf32_bfin_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 4738 { 4739 bfd *obfd = info->output_bfd; 4740 flagword old_flags, new_flags; 4741 bfd_boolean error = FALSE; 4742 4743 /* FIXME: What should be checked when linking shared libraries? */ 4744 if ((ibfd->flags & DYNAMIC) != 0) 4745 return TRUE; 4746 4747 new_flags = elf_elfheader (ibfd)->e_flags; 4748 old_flags = elf_elfheader (obfd)->e_flags; 4749 4750 if (new_flags & EF_BFIN_FDPIC) 4751 new_flags &= ~EF_BFIN_PIC; 4752 4753 #ifndef DEBUG 4754 if (0) 4755 #endif 4756 _bfd_error_handler 4757 ("old_flags = 0x%.8x, new_flags = 0x%.8x, init = %s, filename = %pB", 4758 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no", ibfd); 4759 4760 if (!elf_flags_init (obfd)) /* First call, no flags set. */ 4761 { 4762 elf_flags_init (obfd) = TRUE; 4763 elf_elfheader (obfd)->e_flags = new_flags; 4764 } 4765 4766 if (((new_flags & EF_BFIN_FDPIC) == 0) != (! IS_FDPIC (obfd))) 4767 { 4768 error = TRUE; 4769 if (IS_FDPIC (obfd)) 4770 _bfd_error_handler 4771 (_("%pB: cannot link non-fdpic object file into fdpic executable"), 4772 ibfd); 4773 else 4774 _bfd_error_handler 4775 (_("%pB: cannot link fdpic object file into non-fdpic executable"), 4776 ibfd); 4777 } 4778 4779 if (error) 4780 bfd_set_error (bfd_error_bad_value); 4781 4782 return !error; 4783 } 4784 4785 /* bfin ELF linker hash entry. */ 4786 4787 struct bfin_link_hash_entry 4788 { 4789 struct elf_link_hash_entry root; 4790 4791 /* Number of PC relative relocs copied for this symbol. */ 4792 struct bfin_pcrel_relocs_copied *pcrel_relocs_copied; 4793 }; 4794 4795 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent)) 4796 4797 static struct bfd_hash_entry * 4798 bfin_link_hash_newfunc (struct bfd_hash_entry *entry, 4799 struct bfd_hash_table *table, const char *string) 4800 { 4801 struct bfd_hash_entry *ret = entry; 4802 4803 /* Allocate the structure if it has not already been allocated by a 4804 subclass. */ 4805 if (ret == NULL) 4806 ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry)); 4807 if (ret == NULL) 4808 return ret; 4809 4810 /* Call the allocation method of the superclass. */ 4811 ret = _bfd_elf_link_hash_newfunc (ret, table, string); 4812 if (ret != NULL) 4813 bfin_hash_entry (ret)->pcrel_relocs_copied = NULL; 4814 4815 return ret; 4816 } 4817 4818 /* Create an bfin ELF linker hash table. */ 4819 4820 static struct bfd_link_hash_table * 4821 bfin_link_hash_table_create (bfd * abfd) 4822 { 4823 struct elf_link_hash_table *ret; 4824 size_t amt = sizeof (struct elf_link_hash_table); 4825 4826 ret = bfd_zmalloc (amt); 4827 if (ret == NULL) 4828 return NULL; 4829 4830 if (!_bfd_elf_link_hash_table_init (ret, abfd, bfin_link_hash_newfunc, 4831 sizeof (struct elf_link_hash_entry), 4832 BFIN_ELF_DATA)) 4833 { 4834 free (ret); 4835 return NULL; 4836 } 4837 4838 return &ret->root; 4839 } 4840 4841 /* The size in bytes of an entry in the procedure linkage table. */ 4842 4843 /* Finish up the dynamic sections. */ 4844 4845 static bfd_boolean 4846 bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, 4847 struct bfd_link_info *info) 4848 { 4849 bfd *dynobj; 4850 asection *sdyn; 4851 4852 dynobj = elf_hash_table (info)->dynobj; 4853 4854 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 4855 4856 if (elf_hash_table (info)->dynamic_sections_created) 4857 { 4858 Elf32_External_Dyn *dyncon, *dynconend; 4859 4860 BFD_ASSERT (sdyn != NULL); 4861 4862 dyncon = (Elf32_External_Dyn *) sdyn->contents; 4863 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 4864 for (; dyncon < dynconend; dyncon++) 4865 { 4866 Elf_Internal_Dyn dyn; 4867 4868 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 4869 4870 } 4871 4872 } 4873 return TRUE; 4874 } 4875 4876 /* Finish up dynamic symbol handling. We set the contents of various 4877 dynamic sections here. */ 4878 4879 static bfd_boolean 4880 bfin_finish_dynamic_symbol (bfd * output_bfd, 4881 struct bfd_link_info *info, 4882 struct elf_link_hash_entry *h, 4883 Elf_Internal_Sym * sym) 4884 { 4885 if (h->got.offset != (bfd_vma) - 1) 4886 { 4887 asection *sgot; 4888 asection *srela; 4889 Elf_Internal_Rela rela; 4890 bfd_byte *loc; 4891 4892 /* This symbol has an entry in the global offset table. 4893 Set it up. */ 4894 4895 sgot = elf_hash_table (info)->sgot; 4896 srela = elf_hash_table (info)->srelgot; 4897 BFD_ASSERT (sgot != NULL && srela != NULL); 4898 4899 rela.r_offset = (sgot->output_section->vma 4900 + sgot->output_offset 4901 + (h->got.offset & ~(bfd_vma) 1)); 4902 4903 /* If this is a -Bsymbolic link, and the symbol is defined 4904 locally, we just want to emit a RELATIVE reloc. Likewise if 4905 the symbol was forced to be local because of a version file. 4906 The entry in the global offset table will already have been 4907 initialized in the relocate_section function. */ 4908 if (bfd_link_pic (info) 4909 && (info->symbolic 4910 || h->dynindx == -1 || h->forced_local) && h->def_regular) 4911 { 4912 _bfd_error_handler (_("*** check this relocation %s"), 4913 __FUNCTION__); 4914 rela.r_info = ELF32_R_INFO (0, R_BFIN_PCREL24); 4915 rela.r_addend = bfd_get_signed_32 (output_bfd, 4916 (sgot->contents 4917 + 4918 (h->got. 4919 offset & ~(bfd_vma) 1))); 4920 } 4921 else 4922 { 4923 bfd_put_32 (output_bfd, (bfd_vma) 0, 4924 sgot->contents + (h->got.offset & ~(bfd_vma) 1)); 4925 rela.r_info = ELF32_R_INFO (h->dynindx, R_BFIN_GOT); 4926 rela.r_addend = 0; 4927 } 4928 4929 loc = srela->contents; 4930 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); 4931 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 4932 } 4933 4934 if (h->needs_copy) 4935 { 4936 BFD_ASSERT (0); 4937 } 4938 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ 4939 if (strcmp (h->root.root.string, "__DYNAMIC") == 0 4940 || h == elf_hash_table (info)->hgot) 4941 sym->st_shndx = SHN_ABS; 4942 4943 return TRUE; 4944 } 4945 4946 /* Adjust a symbol defined by a dynamic object and referenced by a 4947 regular object. The current definition is in some section of the 4948 dynamic object, but we're not including those sections. We have to 4949 change the definition to something the rest of the link can 4950 understand. */ 4951 4952 static bfd_boolean 4953 bfin_adjust_dynamic_symbol (struct bfd_link_info *info, 4954 struct elf_link_hash_entry *h) 4955 { 4956 bfd *dynobj; 4957 asection *s; 4958 unsigned int power_of_two; 4959 4960 dynobj = elf_hash_table (info)->dynobj; 4961 4962 /* Make sure we know what is going on here. */ 4963 BFD_ASSERT (dynobj != NULL 4964 && (h->needs_plt 4965 || h->is_weakalias 4966 || (h->def_dynamic && h->ref_regular && !h->def_regular))); 4967 4968 /* If this is a function, put it in the procedure linkage table. We 4969 will fill in the contents of the procedure linkage table later, 4970 when we know the address of the .got section. */ 4971 if (h->type == STT_FUNC || h->needs_plt) 4972 { 4973 BFD_ASSERT(0); 4974 } 4975 4976 /* If this is a weak symbol, and there is a real definition, the 4977 processor independent code will have arranged for us to see the 4978 real definition first, and we can just use the same value. */ 4979 if (h->is_weakalias) 4980 { 4981 struct elf_link_hash_entry *def = weakdef (h); 4982 BFD_ASSERT (def->root.type == bfd_link_hash_defined); 4983 h->root.u.def.section = def->root.u.def.section; 4984 h->root.u.def.value = def->root.u.def.value; 4985 return TRUE; 4986 } 4987 4988 /* This is a reference to a symbol defined by a dynamic object which 4989 is not a function. */ 4990 4991 /* If we are creating a shared library, we must presume that the 4992 only references to the symbol are via the global offset table. 4993 For such cases we need not do anything here; the relocations will 4994 be handled correctly by relocate_section. */ 4995 if (bfd_link_pic (info)) 4996 return TRUE; 4997 4998 /* We must allocate the symbol in our .dynbss section, which will 4999 become part of the .bss section of the executable. There will be 5000 an entry for this symbol in the .dynsym section. The dynamic 5001 object will contain position independent code, so all references 5002 from the dynamic object to this symbol will go through the global 5003 offset table. The dynamic linker will use the .dynsym entry to 5004 determine the address it must put in the global offset table, so 5005 both the dynamic object and the regular object will refer to the 5006 same memory location for the variable. */ 5007 5008 s = bfd_get_linker_section (dynobj, ".dynbss"); 5009 BFD_ASSERT (s != NULL); 5010 5011 #if 0 /* Bfin does not currently have a COPY reloc. */ 5012 /* We must generate a R_BFIN_COPY reloc to tell the dynamic linker to 5013 copy the initial value out of the dynamic object and into the 5014 runtime process image. We need to remember the offset into the 5015 .rela.bss section we are going to use. */ 5016 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) 5017 { 5018 asection *srel; 5019 5020 srel = bfd_get_linker_section (dynobj, ".rela.bss"); 5021 BFD_ASSERT (srel != NULL); 5022 srel->size += sizeof (Elf32_External_Rela); 5023 h->needs_copy = 1; 5024 } 5025 #else 5026 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) 5027 { 5028 _bfd_error_handler (_("the bfin target does not currently support the generation of copy relocations")); 5029 return FALSE; 5030 } 5031 #endif 5032 /* We need to figure out the alignment required for this symbol. I 5033 have no idea how ELF linkers handle this. */ 5034 power_of_two = bfd_log2 (h->size); 5035 if (power_of_two > 3) 5036 power_of_two = 3; 5037 5038 /* Apply the required alignment. */ 5039 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); 5040 if (power_of_two > bfd_section_alignment (s)) 5041 { 5042 if (!bfd_set_section_alignment (s, power_of_two)) 5043 return FALSE; 5044 } 5045 5046 /* Define the symbol as being at this point in the section. */ 5047 h->root.u.def.section = s; 5048 h->root.u.def.value = s->size; 5049 5050 /* Increment the section size to make room for the symbol. */ 5051 s->size += h->size; 5052 5053 return TRUE; 5054 } 5055 5056 /* The bfin linker needs to keep track of the number of relocs that it 5057 decides to copy in check_relocs for each symbol. This is so that it 5058 can discard PC relative relocs if it doesn't need them when linking 5059 with -Bsymbolic. We store the information in a field extending the 5060 regular ELF linker hash table. */ 5061 5062 /* This structure keeps track of the number of PC relative relocs we have 5063 copied for a given symbol. */ 5064 5065 struct bfin_pcrel_relocs_copied 5066 { 5067 /* Next section. */ 5068 struct bfin_pcrel_relocs_copied *next; 5069 /* A section in dynobj. */ 5070 asection *section; 5071 /* Number of relocs copied in this section. */ 5072 bfd_size_type count; 5073 }; 5074 5075 /* This function is called via elf_link_hash_traverse if we are 5076 creating a shared object. In the -Bsymbolic case it discards the 5077 space allocated to copy PC relative relocs against symbols which 5078 are defined in regular objects. For the normal shared case, it 5079 discards space for pc-relative relocs that have become local due to 5080 symbol visibility changes. We allocated space for them in the 5081 check_relocs routine, but we won't fill them in in the 5082 relocate_section routine. 5083 5084 We also check whether any of the remaining relocations apply 5085 against a readonly section, and set the DF_TEXTREL flag in this 5086 case. */ 5087 5088 static bfd_boolean 5089 bfin_discard_copies (struct elf_link_hash_entry *h, void * inf) 5090 { 5091 struct bfd_link_info *info = (struct bfd_link_info *) inf; 5092 struct bfin_pcrel_relocs_copied *s; 5093 5094 if (!h->def_regular || (!info->symbolic && !h->forced_local)) 5095 { 5096 if ((info->flags & DF_TEXTREL) == 0) 5097 { 5098 /* Look for relocations against read-only sections. */ 5099 for (s = bfin_hash_entry (h)->pcrel_relocs_copied; 5100 s != NULL; s = s->next) 5101 if ((s->section->flags & SEC_READONLY) != 0) 5102 { 5103 info->flags |= DF_TEXTREL; 5104 break; 5105 } 5106 } 5107 5108 return TRUE; 5109 } 5110 5111 for (s = bfin_hash_entry (h)->pcrel_relocs_copied; 5112 s != NULL; s = s->next) 5113 s->section->size -= s->count * sizeof (Elf32_External_Rela); 5114 5115 return TRUE; 5116 } 5117 5118 static bfd_boolean 5119 bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, 5120 struct bfd_link_info *info) 5121 { 5122 bfd *dynobj; 5123 asection *s; 5124 bfd_boolean relocs; 5125 5126 dynobj = elf_hash_table (info)->dynobj; 5127 BFD_ASSERT (dynobj != NULL); 5128 5129 if (elf_hash_table (info)->dynamic_sections_created) 5130 { 5131 /* Set the contents of the .interp section to the interpreter. */ 5132 if (bfd_link_executable (info) && !info->nointerp) 5133 { 5134 s = bfd_get_linker_section (dynobj, ".interp"); 5135 BFD_ASSERT (s != NULL); 5136 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 5137 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 5138 } 5139 } 5140 else 5141 { 5142 /* We may have created entries in the .rela.got section. 5143 However, if we are not creating the dynamic sections, we will 5144 not actually use these entries. Reset the size of .rela.got, 5145 which will cause it to get stripped from the output file 5146 below. */ 5147 s = elf_hash_table (info)->srelgot; 5148 if (s != NULL) 5149 s->size = 0; 5150 } 5151 5152 /* If this is a -Bsymbolic shared link, then we need to discard all 5153 PC relative relocs against symbols defined in a regular object. 5154 For the normal shared case we discard the PC relative relocs 5155 against symbols that have become local due to visibility changes. 5156 We allocated space for them in the check_relocs routine, but we 5157 will not fill them in in the relocate_section routine. */ 5158 if (bfd_link_pic (info)) 5159 elf_link_hash_traverse (elf_hash_table (info), 5160 bfin_discard_copies, info); 5161 5162 /* The check_relocs and adjust_dynamic_symbol entry points have 5163 determined the sizes of the various dynamic sections. Allocate 5164 memory for them. */ 5165 relocs = FALSE; 5166 for (s = dynobj->sections; s != NULL; s = s->next) 5167 { 5168 const char *name; 5169 bfd_boolean strip; 5170 5171 if ((s->flags & SEC_LINKER_CREATED) == 0) 5172 continue; 5173 5174 /* It's OK to base decisions on the section name, because none 5175 of the dynobj section names depend upon the input files. */ 5176 name = bfd_section_name (s); 5177 5178 strip = FALSE; 5179 5180 if (CONST_STRNEQ (name, ".rela")) 5181 { 5182 if (s->size == 0) 5183 { 5184 /* If we don't need this section, strip it from the 5185 output file. This is mostly to handle .rela.bss and 5186 .rela.plt. We must create both sections in 5187 create_dynamic_sections, because they must be created 5188 before the linker maps input sections to output 5189 sections. The linker does that before 5190 adjust_dynamic_symbol is called, and it is that 5191 function which decides whether anything needs to go 5192 into these sections. */ 5193 strip = TRUE; 5194 } 5195 else 5196 { 5197 relocs = TRUE; 5198 5199 /* We use the reloc_count field as a counter if we need 5200 to copy relocs into the output file. */ 5201 s->reloc_count = 0; 5202 } 5203 } 5204 else if (! CONST_STRNEQ (name, ".got")) 5205 { 5206 /* It's not one of our sections, so don't allocate space. */ 5207 continue; 5208 } 5209 5210 if (strip) 5211 { 5212 s->flags |= SEC_EXCLUDE; 5213 continue; 5214 } 5215 5216 /* Allocate memory for the section contents. */ 5217 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. 5218 Unused entries should be reclaimed before the section's contents 5219 are written out, but at the moment this does not happen. Thus in 5220 order to prevent writing out garbage, we initialise the section's 5221 contents to zero. */ 5222 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 5223 if (s->contents == NULL && s->size != 0) 5224 return FALSE; 5225 } 5226 5227 if (elf_hash_table (info)->dynamic_sections_created) 5228 { 5229 /* Add some entries to the .dynamic section. We fill in the 5230 values later, in bfin_finish_dynamic_sections, but we 5231 must add the entries now so that we get the correct size for 5232 the .dynamic section. The DT_DEBUG entry is filled in by the 5233 dynamic linker and used by the debugger. */ 5234 #define add_dynamic_entry(TAG, VAL) \ 5235 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 5236 5237 if (!bfd_link_pic (info)) 5238 { 5239 if (!add_dynamic_entry (DT_DEBUG, 0)) 5240 return FALSE; 5241 } 5242 5243 5244 if (relocs) 5245 { 5246 if (!add_dynamic_entry (DT_RELA, 0) 5247 || !add_dynamic_entry (DT_RELASZ, 0) 5248 || !add_dynamic_entry (DT_RELAENT, 5249 sizeof (Elf32_External_Rela))) 5250 return FALSE; 5251 } 5252 5253 if ((info->flags & DF_TEXTREL) != 0) 5254 { 5255 if (!add_dynamic_entry (DT_TEXTREL, 0)) 5256 return FALSE; 5257 } 5258 } 5259 #undef add_dynamic_entry 5260 5261 return TRUE; 5262 } 5263 5264 /* Given a .data section and a .emreloc in-memory section, store 5265 relocation information into the .emreloc section which can be 5266 used at runtime to relocate the section. This is called by the 5267 linker when the --embedded-relocs switch is used. This is called 5268 after the add_symbols entry point has been called for all the 5269 objects, and before the final_link entry point is called. */ 5270 5271 bfd_boolean 5272 bfd_bfin_elf32_create_embedded_relocs (bfd *abfd, 5273 struct bfd_link_info *info, 5274 asection *datasec, 5275 asection *relsec, 5276 char **errmsg) 5277 { 5278 Elf_Internal_Shdr *symtab_hdr; 5279 Elf_Internal_Sym *isymbuf = NULL; 5280 Elf_Internal_Rela *internal_relocs = NULL; 5281 Elf_Internal_Rela *irel, *irelend; 5282 bfd_byte *p; 5283 bfd_size_type amt; 5284 5285 BFD_ASSERT (! bfd_link_relocatable (info)); 5286 5287 *errmsg = NULL; 5288 5289 if (datasec->reloc_count == 0) 5290 return TRUE; 5291 5292 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 5293 5294 /* Get a copy of the native relocations. */ 5295 internal_relocs = (_bfd_elf_link_read_relocs 5296 (abfd, datasec, NULL, (Elf_Internal_Rela *) NULL, 5297 info->keep_memory)); 5298 if (internal_relocs == NULL) 5299 goto error_return; 5300 5301 amt = (bfd_size_type) datasec->reloc_count * 12; 5302 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt); 5303 if (relsec->contents == NULL) 5304 goto error_return; 5305 5306 p = relsec->contents; 5307 5308 irelend = internal_relocs + datasec->reloc_count; 5309 for (irel = internal_relocs; irel < irelend; irel++, p += 12) 5310 { 5311 asection *targetsec; 5312 5313 /* We are going to write a four byte longword into the runtime 5314 reloc section. The longword will be the address in the data 5315 section which must be relocated. It is followed by the name 5316 of the target section NUL-padded or truncated to 8 5317 characters. */ 5318 5319 /* We can only relocate absolute longword relocs at run time. */ 5320 if (ELF32_R_TYPE (irel->r_info) != (int) R_BFIN_BYTE4_DATA) 5321 { 5322 *errmsg = _("unsupported relocation type"); 5323 bfd_set_error (bfd_error_bad_value); 5324 goto error_return; 5325 } 5326 5327 /* Get the target section referred to by the reloc. */ 5328 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 5329 { 5330 /* A local symbol. */ 5331 Elf_Internal_Sym *isym; 5332 5333 /* Read this BFD's local symbols if we haven't done so already. */ 5334 if (isymbuf == NULL) 5335 { 5336 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 5337 if (isymbuf == NULL) 5338 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 5339 symtab_hdr->sh_info, 0, 5340 NULL, NULL, NULL); 5341 if (isymbuf == NULL) 5342 goto error_return; 5343 } 5344 5345 isym = isymbuf + ELF32_R_SYM (irel->r_info); 5346 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx); 5347 } 5348 else 5349 { 5350 unsigned long indx; 5351 struct elf_link_hash_entry *h; 5352 5353 /* An external symbol. */ 5354 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 5355 h = elf_sym_hashes (abfd)[indx]; 5356 BFD_ASSERT (h != NULL); 5357 if (h->root.type == bfd_link_hash_defined 5358 || h->root.type == bfd_link_hash_defweak) 5359 targetsec = h->root.u.def.section; 5360 else 5361 targetsec = NULL; 5362 } 5363 5364 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p); 5365 memset (p + 4, 0, 8); 5366 if (targetsec != NULL) 5367 strncpy ((char *) p + 4, targetsec->output_section->name, 8); 5368 } 5369 5370 if (symtab_hdr->contents != (unsigned char *) isymbuf) 5371 free (isymbuf); 5372 if (elf_section_data (datasec)->relocs != internal_relocs) 5373 free (internal_relocs); 5374 return TRUE; 5375 5376 error_return: 5377 if (symtab_hdr->contents != (unsigned char *) isymbuf) 5378 free (isymbuf); 5379 if (elf_section_data (datasec)->relocs != internal_relocs) 5380 free (internal_relocs); 5381 return FALSE; 5382 } 5383 5384 struct bfd_elf_special_section const elf32_bfin_special_sections[] = 5385 { 5386 { ".l1.text", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, 5387 { ".l1.data", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 5388 { NULL, 0, 0, 0, 0 } 5389 }; 5390 5391 5392 #define TARGET_LITTLE_SYM bfin_elf32_vec 5393 #define TARGET_LITTLE_NAME "elf32-bfin" 5394 #define ELF_ARCH bfd_arch_bfin 5395 #define ELF_TARGET_ID BFIN_ELF_DATA 5396 #define ELF_MACHINE_CODE EM_BLACKFIN 5397 #define ELF_MAXPAGESIZE 0x1000 5398 #define elf_symbol_leading_char '_' 5399 5400 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup 5401 #define bfd_elf32_bfd_reloc_name_lookup \ 5402 bfin_bfd_reloc_name_lookup 5403 #define elf_info_to_howto bfin_info_to_howto 5404 #define elf_info_to_howto_rel NULL 5405 #define elf_backend_object_p elf32_bfin_object_p 5406 5407 #define bfd_elf32_bfd_is_local_label_name \ 5408 bfin_is_local_label_name 5409 5410 #define elf_backend_create_dynamic_sections \ 5411 _bfd_elf_create_dynamic_sections 5412 #define bfd_elf32_bfd_link_hash_table_create \ 5413 bfin_link_hash_table_create 5414 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link 5415 5416 #define elf_backend_check_relocs bfin_check_relocs 5417 #define elf_backend_adjust_dynamic_symbol \ 5418 bfin_adjust_dynamic_symbol 5419 #define elf_backend_size_dynamic_sections \ 5420 bfin_size_dynamic_sections 5421 #define elf_backend_relocate_section bfin_relocate_section 5422 #define elf_backend_finish_dynamic_symbol \ 5423 bfin_finish_dynamic_symbol 5424 #define elf_backend_finish_dynamic_sections \ 5425 bfin_finish_dynamic_sections 5426 #define elf_backend_gc_mark_hook bfin_gc_mark_hook 5427 #define bfd_elf32_bfd_merge_private_bfd_data \ 5428 elf32_bfin_merge_private_bfd_data 5429 #define bfd_elf32_bfd_set_private_flags \ 5430 elf32_bfin_set_private_flags 5431 #define bfd_elf32_bfd_print_private_bfd_data \ 5432 elf32_bfin_print_private_bfd_data 5433 #define elf_backend_final_write_processing \ 5434 elf32_bfin_final_write_processing 5435 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class 5436 #define elf_backend_stack_align 8 5437 #define elf_backend_can_gc_sections 1 5438 #define elf_backend_special_sections elf32_bfin_special_sections 5439 #define elf_backend_can_refcount 1 5440 #define elf_backend_want_got_plt 0 5441 #define elf_backend_plt_readonly 1 5442 #define elf_backend_want_plt_sym 0 5443 #define elf_backend_got_header_size 12 5444 #define elf_backend_rela_normal 1 5445 5446 #include "elf32-target.h" 5447 5448 #undef TARGET_LITTLE_SYM 5449 #define TARGET_LITTLE_SYM bfin_elf32_fdpic_vec 5450 #undef TARGET_LITTLE_NAME 5451 #define TARGET_LITTLE_NAME "elf32-bfinfdpic" 5452 #undef elf32_bed 5453 #define elf32_bed elf32_bfinfdpic_bed 5454 5455 #undef elf_backend_got_header_size 5456 #define elf_backend_got_header_size 0 5457 5458 #undef elf_backend_relocate_section 5459 #define elf_backend_relocate_section bfinfdpic_relocate_section 5460 #undef elf_backend_check_relocs 5461 #define elf_backend_check_relocs bfinfdpic_check_relocs 5462 5463 #undef bfd_elf32_bfd_link_hash_table_create 5464 #define bfd_elf32_bfd_link_hash_table_create \ 5465 bfinfdpic_elf_link_hash_table_create 5466 #undef elf_backend_always_size_sections 5467 #define elf_backend_always_size_sections \ 5468 elf32_bfinfdpic_always_size_sections 5469 5470 #undef elf_backend_create_dynamic_sections 5471 #define elf_backend_create_dynamic_sections \ 5472 elf32_bfinfdpic_create_dynamic_sections 5473 #undef elf_backend_adjust_dynamic_symbol 5474 #define elf_backend_adjust_dynamic_symbol \ 5475 elf32_bfinfdpic_adjust_dynamic_symbol 5476 #undef elf_backend_size_dynamic_sections 5477 #define elf_backend_size_dynamic_sections \ 5478 elf32_bfinfdpic_size_dynamic_sections 5479 #undef elf_backend_finish_dynamic_symbol 5480 #define elf_backend_finish_dynamic_symbol \ 5481 elf32_bfinfdpic_finish_dynamic_symbol 5482 #undef elf_backend_finish_dynamic_sections 5483 #define elf_backend_finish_dynamic_sections \ 5484 elf32_bfinfdpic_finish_dynamic_sections 5485 5486 #undef elf_backend_discard_info 5487 #define elf_backend_discard_info \ 5488 bfinfdpic_elf_discard_info 5489 #undef elf_backend_can_make_relative_eh_frame 5490 #define elf_backend_can_make_relative_eh_frame \ 5491 bfinfdpic_elf_use_relative_eh_frame 5492 #undef elf_backend_can_make_lsda_relative_eh_frame 5493 #define elf_backend_can_make_lsda_relative_eh_frame \ 5494 bfinfdpic_elf_use_relative_eh_frame 5495 #undef elf_backend_encode_eh_address 5496 #define elf_backend_encode_eh_address \ 5497 bfinfdpic_elf_encode_eh_address 5498 5499 #undef elf_backend_may_use_rel_p 5500 #define elf_backend_may_use_rel_p 1 5501 #undef elf_backend_may_use_rela_p 5502 #define elf_backend_may_use_rela_p 1 5503 /* We use REL for dynamic relocations only. */ 5504 #undef elf_backend_default_use_rela_p 5505 #define elf_backend_default_use_rela_p 1 5506 5507 #undef elf_backend_omit_section_dynsym 5508 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym 5509 5510 #include "elf32-target.h" 5511