1 /* BFD back-end for National Semiconductor's CR16 ELF 2 Copyright (C) 2007-2014 Free Software Foundation, Inc. 3 Written by M R Swami Reddy. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software Foundation, 19 Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 20 21 #include "sysdep.h" 22 #include "bfd.h" 23 #include "bfdlink.h" 24 #include "libbfd.h" 25 #include "libiberty.h" 26 #include "elf-bfd.h" 27 #include "elf/cr16.h" 28 29 /* The cr16 linker needs to keep track of the number of relocs that 30 it decides to copy in check_relocs for each symbol. This is so 31 that it can discard PC relative relocs if it doesn't need them when 32 linking with -Bsymbolic. We store the information in a field 33 extending the regular ELF linker hash table. */ 34 35 struct elf32_cr16_link_hash_entry 36 { 37 /* The basic elf link hash table entry. */ 38 struct elf_link_hash_entry root; 39 40 /* For function symbols, the number of times this function is 41 called directly (ie by name). */ 42 unsigned int direct_calls; 43 44 /* For function symbols, the size of this function's stack 45 (if <= 255 bytes). We stuff this into "call" instructions 46 to this target when it's valid and profitable to do so. 47 48 This does not include stack allocated by movm! */ 49 unsigned char stack_size; 50 51 /* For function symbols, arguments (if any) for movm instruction 52 in the prologue. We stuff this value into "call" instructions 53 to the target when it's valid and profitable to do so. */ 54 unsigned char movm_args; 55 56 /* For function symbols, the amount of stack space that would be allocated 57 by the movm instruction. This is redundant with movm_args, but we 58 add it to the hash table to avoid computing it over and over. */ 59 unsigned char movm_stack_size; 60 61 /* Used to mark functions which have had redundant parts of their 62 prologue deleted. */ 63 #define CR16_DELETED_PROLOGUE_BYTES 0x1 64 unsigned char flags; 65 66 /* Calculated value. */ 67 bfd_vma value; 68 }; 69 70 /* cr16_reloc_map array maps BFD relocation enum into a CRGAS relocation type. */ 71 72 struct cr16_reloc_map 73 { 74 bfd_reloc_code_real_type bfd_reloc_enum; /* BFD relocation enum. */ 75 unsigned short cr16_reloc_type; /* CR16 relocation type. */ 76 }; 77 78 static const struct cr16_reloc_map cr16_reloc_map[R_CR16_MAX] = 79 { 80 {BFD_RELOC_NONE, R_CR16_NONE}, 81 {BFD_RELOC_CR16_NUM8, R_CR16_NUM8}, 82 {BFD_RELOC_CR16_NUM16, R_CR16_NUM16}, 83 {BFD_RELOC_CR16_NUM32, R_CR16_NUM32}, 84 {BFD_RELOC_CR16_NUM32a, R_CR16_NUM32a}, 85 {BFD_RELOC_CR16_REGREL4, R_CR16_REGREL4}, 86 {BFD_RELOC_CR16_REGREL4a, R_CR16_REGREL4a}, 87 {BFD_RELOC_CR16_REGREL14, R_CR16_REGREL14}, 88 {BFD_RELOC_CR16_REGREL14a, R_CR16_REGREL14a}, 89 {BFD_RELOC_CR16_REGREL16, R_CR16_REGREL16}, 90 {BFD_RELOC_CR16_REGREL20, R_CR16_REGREL20}, 91 {BFD_RELOC_CR16_REGREL20a, R_CR16_REGREL20a}, 92 {BFD_RELOC_CR16_ABS20, R_CR16_ABS20}, 93 {BFD_RELOC_CR16_ABS24, R_CR16_ABS24}, 94 {BFD_RELOC_CR16_IMM4, R_CR16_IMM4}, 95 {BFD_RELOC_CR16_IMM8, R_CR16_IMM8}, 96 {BFD_RELOC_CR16_IMM16, R_CR16_IMM16}, 97 {BFD_RELOC_CR16_IMM20, R_CR16_IMM20}, 98 {BFD_RELOC_CR16_IMM24, R_CR16_IMM24}, 99 {BFD_RELOC_CR16_IMM32, R_CR16_IMM32}, 100 {BFD_RELOC_CR16_IMM32a, R_CR16_IMM32a}, 101 {BFD_RELOC_CR16_DISP4, R_CR16_DISP4}, 102 {BFD_RELOC_CR16_DISP8, R_CR16_DISP8}, 103 {BFD_RELOC_CR16_DISP16, R_CR16_DISP16}, 104 {BFD_RELOC_CR16_DISP24, R_CR16_DISP24}, 105 {BFD_RELOC_CR16_DISP24a, R_CR16_DISP24a}, 106 {BFD_RELOC_CR16_SWITCH8, R_CR16_SWITCH8}, 107 {BFD_RELOC_CR16_SWITCH16, R_CR16_SWITCH16}, 108 {BFD_RELOC_CR16_SWITCH32, R_CR16_SWITCH32}, 109 {BFD_RELOC_CR16_GOT_REGREL20, R_CR16_GOT_REGREL20}, 110 {BFD_RELOC_CR16_GOTC_REGREL20, R_CR16_GOTC_REGREL20}, 111 {BFD_RELOC_CR16_GLOB_DAT, R_CR16_GLOB_DAT} 112 }; 113 114 static reloc_howto_type cr16_elf_howto_table[] = 115 { 116 HOWTO (R_CR16_NONE, /* type */ 117 0, /* rightshift */ 118 2, /* size */ 119 32, /* bitsize */ 120 FALSE, /* pc_relative */ 121 0, /* bitpos */ 122 complain_overflow_dont, /* complain_on_overflow */ 123 bfd_elf_generic_reloc, /* special_function */ 124 "R_CR16_NONE", /* name */ 125 FALSE, /* partial_inplace */ 126 0, /* src_mask */ 127 0, /* dst_mask */ 128 FALSE), /* pcrel_offset */ 129 130 HOWTO (R_CR16_NUM8, /* type */ 131 0, /* rightshift */ 132 0, /* size */ 133 8, /* bitsize */ 134 FALSE, /* pc_relative */ 135 0, /* bitpos */ 136 complain_overflow_bitfield,/* complain_on_overflow */ 137 bfd_elf_generic_reloc, /* special_function */ 138 "R_CR16_NUM8", /* name */ 139 FALSE, /* partial_inplace */ 140 0x0, /* src_mask */ 141 0xff, /* dst_mask */ 142 FALSE), /* pcrel_offset */ 143 144 HOWTO (R_CR16_NUM16, /* type */ 145 0, /* rightshift */ 146 1, /* size */ 147 16, /* bitsize */ 148 FALSE, /* pc_relative */ 149 0, /* bitpos */ 150 complain_overflow_bitfield,/* complain_on_overflow */ 151 bfd_elf_generic_reloc, /* special_function */ 152 "R_CR16_NUM16", /* name */ 153 FALSE, /* partial_inplace */ 154 0x0, /* src_mask */ 155 0xffff, /* dst_mask */ 156 FALSE), /* pcrel_offset */ 157 158 HOWTO (R_CR16_NUM32, /* type */ 159 0, /* rightshift */ 160 2, /* size */ 161 32, /* bitsize */ 162 FALSE, /* pc_relative */ 163 0, /* bitpos */ 164 complain_overflow_bitfield,/* complain_on_overflow */ 165 bfd_elf_generic_reloc, /* special_function */ 166 "R_CR16_NUM32", /* name */ 167 FALSE, /* partial_inplace */ 168 0x0, /* src_mask */ 169 0xffffffff, /* dst_mask */ 170 FALSE), /* pcrel_offset */ 171 172 HOWTO (R_CR16_NUM32a, /* type */ 173 1, /* rightshift */ 174 2, /* size */ 175 32, /* bitsize */ 176 FALSE, /* pc_relative */ 177 0, /* bitpos */ 178 complain_overflow_bitfield,/* complain_on_overflow */ 179 bfd_elf_generic_reloc, /* special_function */ 180 "R_CR16_NUM32a", /* name */ 181 FALSE, /* partial_inplace */ 182 0x0, /* src_mask */ 183 0xffffffff, /* dst_mask */ 184 FALSE), /* pcrel_offset */ 185 186 HOWTO (R_CR16_REGREL4, /* type */ 187 0, /* rightshift */ 188 0, /* size */ 189 4, /* bitsize */ 190 FALSE, /* pc_relative */ 191 0, /* bitpos */ 192 complain_overflow_bitfield,/* complain_on_overflow */ 193 bfd_elf_generic_reloc, /* special_function */ 194 "R_CR16_REGREL4", /* name */ 195 FALSE, /* partial_inplace */ 196 0x0, /* src_mask */ 197 0xf, /* dst_mask */ 198 FALSE), /* pcrel_offset */ 199 200 HOWTO (R_CR16_REGREL4a, /* type */ 201 0, /* rightshift */ 202 0, /* size */ 203 4, /* bitsize */ 204 FALSE, /* pc_relative */ 205 0, /* bitpos */ 206 complain_overflow_bitfield,/* complain_on_overflow */ 207 bfd_elf_generic_reloc, /* special_function */ 208 "R_CR16_REGREL4a", /* name */ 209 FALSE, /* partial_inplace */ 210 0x0, /* src_mask */ 211 0xf, /* dst_mask */ 212 FALSE), /* pcrel_offset */ 213 214 HOWTO (R_CR16_REGREL14, /* type */ 215 0, /* rightshift */ 216 1, /* size */ 217 14, /* bitsize */ 218 FALSE, /* pc_relative */ 219 0, /* bitpos */ 220 complain_overflow_bitfield,/* complain_on_overflow */ 221 bfd_elf_generic_reloc, /* special_function */ 222 "R_CR16_REGREL14", /* name */ 223 FALSE, /* partial_inplace */ 224 0x0, /* src_mask */ 225 0x3fff, /* dst_mask */ 226 FALSE), /* pcrel_offset */ 227 228 HOWTO (R_CR16_REGREL14a, /* type */ 229 0, /* rightshift */ 230 1, /* size */ 231 14, /* bitsize */ 232 FALSE, /* pc_relative */ 233 0, /* bitpos */ 234 complain_overflow_bitfield,/* complain_on_overflow */ 235 bfd_elf_generic_reloc, /* special_function */ 236 "R_CR16_REGREL14a", /* name */ 237 FALSE, /* partial_inplace */ 238 0x0, /* src_mask */ 239 0x3fff, /* dst_mask */ 240 FALSE), /* pcrel_offset */ 241 242 HOWTO (R_CR16_REGREL16, /* type */ 243 0, /* rightshift */ 244 1, /* size */ 245 16, /* bitsize */ 246 FALSE, /* pc_relative */ 247 0, /* bitpos */ 248 complain_overflow_bitfield,/* complain_on_overflow */ 249 bfd_elf_generic_reloc, /* special_function */ 250 "R_CR16_REGREL16", /* name */ 251 FALSE, /* partial_inplace */ 252 0x0, /* src_mask */ 253 0xffff, /* dst_mask */ 254 FALSE), /* pcrel_offset */ 255 256 HOWTO (R_CR16_REGREL20, /* type */ 257 0, /* rightshift */ 258 2, /* size */ 259 20, /* bitsize */ 260 FALSE, /* pc_relative */ 261 0, /* bitpos */ 262 complain_overflow_bitfield,/* complain_on_overflow */ 263 bfd_elf_generic_reloc, /* special_function */ 264 "R_CR16_REGREL20", /* name */ 265 FALSE, /* partial_inplace */ 266 0x0, /* src_mask */ 267 0xfffff, /* dst_mask */ 268 FALSE), /* pcrel_offset */ 269 270 HOWTO (R_CR16_REGREL20a, /* type */ 271 0, /* rightshift */ 272 2, /* size */ 273 20, /* bitsize */ 274 FALSE, /* pc_relative */ 275 0, /* bitpos */ 276 complain_overflow_bitfield,/* complain_on_overflow */ 277 bfd_elf_generic_reloc, /* special_function */ 278 "R_CR16_REGREL20a", /* name */ 279 FALSE, /* partial_inplace */ 280 0x0, /* src_mask */ 281 0xfffff, /* dst_mask */ 282 FALSE), /* pcrel_offset */ 283 284 HOWTO (R_CR16_ABS20, /* type */ 285 0, /* rightshift */ 286 2, /* size */ 287 20, /* bitsize */ 288 FALSE, /* pc_relative */ 289 0, /* bitpos */ 290 complain_overflow_bitfield,/* complain_on_overflow */ 291 bfd_elf_generic_reloc, /* special_function */ 292 "R_CR16_ABS20", /* name */ 293 FALSE, /* partial_inplace */ 294 0x0, /* src_mask */ 295 0xfffff, /* dst_mask */ 296 FALSE), /* pcrel_offset */ 297 298 HOWTO (R_CR16_ABS24, /* type */ 299 0, /* rightshift */ 300 2, /* size */ 301 24, /* bitsize */ 302 FALSE, /* pc_relative */ 303 0, /* bitpos */ 304 complain_overflow_bitfield,/* complain_on_overflow */ 305 bfd_elf_generic_reloc, /* special_function */ 306 "R_CR16_ABS24", /* name */ 307 FALSE, /* partial_inplace */ 308 0x0, /* src_mask */ 309 0xffffff, /* dst_mask */ 310 FALSE), /* pcrel_offset */ 311 312 HOWTO (R_CR16_IMM4, /* type */ 313 0, /* rightshift */ 314 0, /* size */ 315 4, /* bitsize */ 316 FALSE, /* pc_relative */ 317 0, /* bitpos */ 318 complain_overflow_bitfield,/* complain_on_overflow */ 319 bfd_elf_generic_reloc, /* special_function */ 320 "R_CR16_IMM4", /* name */ 321 FALSE, /* partial_inplace */ 322 0x0, /* src_mask */ 323 0xf, /* dst_mask */ 324 FALSE), /* pcrel_offset */ 325 326 HOWTO (R_CR16_IMM8, /* type */ 327 0, /* rightshift */ 328 0, /* size */ 329 8, /* bitsize */ 330 FALSE, /* pc_relative */ 331 0, /* bitpos */ 332 complain_overflow_bitfield,/* complain_on_overflow */ 333 bfd_elf_generic_reloc, /* special_function */ 334 "R_CR16_IMM8", /* name */ 335 FALSE, /* partial_inplace */ 336 0x0, /* src_mask */ 337 0xff, /* dst_mask */ 338 FALSE), /* pcrel_offset */ 339 340 HOWTO (R_CR16_IMM16, /* type */ 341 0, /* rightshift */ 342 1, /* size */ 343 16, /* bitsize */ 344 FALSE, /* pc_relative */ 345 0, /* bitpos */ 346 complain_overflow_bitfield,/* complain_on_overflow */ 347 bfd_elf_generic_reloc, /* special_function */ 348 "R_CR16_IMM16", /* name */ 349 FALSE, /* partial_inplace */ 350 0x0, /* src_mask */ 351 0xffff, /* dst_mask */ 352 FALSE), /* pcrel_offset */ 353 354 HOWTO (R_CR16_IMM20, /* type */ 355 0, /* rightshift */ 356 2, /* size */ 357 20, /* bitsize */ 358 FALSE, /* pc_relative */ 359 0, /* bitpos */ 360 complain_overflow_bitfield,/* complain_on_overflow */ 361 bfd_elf_generic_reloc, /* special_function */ 362 "R_CR16_IMM20", /* name */ 363 FALSE, /* partial_inplace */ 364 0x0, /* src_mask */ 365 0xfffff, /* dst_mask */ 366 FALSE), /* pcrel_offset */ 367 368 HOWTO (R_CR16_IMM24, /* type */ 369 0, /* rightshift */ 370 2, /* size */ 371 24, /* bitsize */ 372 FALSE, /* pc_relative */ 373 0, /* bitpos */ 374 complain_overflow_bitfield,/* complain_on_overflow */ 375 bfd_elf_generic_reloc, /* special_function */ 376 "R_CR16_IMM24", /* name */ 377 FALSE, /* partial_inplace */ 378 0x0, /* src_mask */ 379 0xffffff, /* dst_mask */ 380 FALSE), /* pcrel_offset */ 381 382 HOWTO (R_CR16_IMM32, /* type */ 383 0, /* rightshift */ 384 2, /* size */ 385 32, /* bitsize */ 386 FALSE, /* pc_relative */ 387 0, /* bitpos */ 388 complain_overflow_bitfield,/* complain_on_overflow */ 389 bfd_elf_generic_reloc, /* special_function */ 390 "R_CR16_IMM32", /* name */ 391 FALSE, /* partial_inplace */ 392 0x0, /* src_mask */ 393 0xffffffff, /* dst_mask */ 394 FALSE), /* pcrel_offset */ 395 396 HOWTO (R_CR16_IMM32a, /* type */ 397 1, /* rightshift */ 398 2, /* size */ 399 32, /* bitsize */ 400 FALSE, /* pc_relative */ 401 0, /* bitpos */ 402 complain_overflow_bitfield,/* complain_on_overflow */ 403 bfd_elf_generic_reloc, /* special_function */ 404 "R_CR16_IMM32a", /* name */ 405 FALSE, /* partial_inplace */ 406 0x0, /* src_mask */ 407 0xffffffff, /* dst_mask */ 408 FALSE), /* pcrel_offset */ 409 410 HOWTO (R_CR16_DISP4, /* type */ 411 1, /* rightshift */ 412 0, /* size (0 = byte, 1 = short, 2 = long) */ 413 4, /* bitsize */ 414 TRUE, /* pc_relative */ 415 0, /* bitpos */ 416 complain_overflow_unsigned, /* complain_on_overflow */ 417 bfd_elf_generic_reloc, /* special_function */ 418 "R_CR16_DISP4", /* name */ 419 FALSE, /* partial_inplace */ 420 0x0, /* src_mask */ 421 0xf, /* dst_mask */ 422 FALSE), /* pcrel_offset */ 423 424 HOWTO (R_CR16_DISP8, /* type */ 425 1, /* rightshift */ 426 0, /* size (0 = byte, 1 = short, 2 = long) */ 427 8, /* bitsize */ 428 TRUE, /* pc_relative */ 429 0, /* bitpos */ 430 complain_overflow_unsigned, /* complain_on_overflow */ 431 bfd_elf_generic_reloc, /* special_function */ 432 "R_CR16_DISP8", /* name */ 433 FALSE, /* partial_inplace */ 434 0x0, /* src_mask */ 435 0x1ff, /* dst_mask */ 436 FALSE), /* pcrel_offset */ 437 438 HOWTO (R_CR16_DISP16, /* type */ 439 0, /* rightshift REVIITS: To sync with WinIDEA*/ 440 1, /* size (0 = byte, 1 = short, 2 = long) */ 441 16, /* bitsize */ 442 TRUE, /* pc_relative */ 443 0, /* bitpos */ 444 complain_overflow_unsigned, /* complain_on_overflow */ 445 bfd_elf_generic_reloc, /* special_function */ 446 "R_CR16_DISP16", /* name */ 447 FALSE, /* partial_inplace */ 448 0x0, /* src_mask */ 449 0x1ffff, /* dst_mask */ 450 FALSE), /* pcrel_offset */ 451 /* REVISIT: DISP24 should be left-shift by 2 as per ISA doc 452 but its not done, to sync with WinIDEA and CR16 4.1 tools */ 453 HOWTO (R_CR16_DISP24, /* type */ 454 0, /* rightshift */ 455 2, /* size (0 = byte, 1 = short, 2 = long) */ 456 24, /* bitsize */ 457 TRUE, /* pc_relative */ 458 0, /* bitpos */ 459 complain_overflow_unsigned, /* complain_on_overflow */ 460 bfd_elf_generic_reloc, /* special_function */ 461 "R_CR16_DISP24", /* name */ 462 FALSE, /* partial_inplace */ 463 0x0, /* src_mask */ 464 0x1ffffff, /* dst_mask */ 465 FALSE), /* pcrel_offset */ 466 467 HOWTO (R_CR16_DISP24a, /* type */ 468 0, /* rightshift */ 469 2, /* size (0 = byte, 1 = short, 2 = long) */ 470 24, /* bitsize */ 471 TRUE, /* pc_relative */ 472 0, /* bitpos */ 473 complain_overflow_unsigned, /* complain_on_overflow */ 474 bfd_elf_generic_reloc, /* special_function */ 475 "R_CR16_DISP24a", /* name */ 476 FALSE, /* partial_inplace */ 477 0x0, /* src_mask */ 478 0xffffff, /* dst_mask */ 479 FALSE), /* pcrel_offset */ 480 481 /* An 8 bit switch table entry. This is generated for an expression 482 such as ``.byte L1 - L2''. The offset holds the difference 483 between the reloc address and L2. */ 484 HOWTO (R_CR16_SWITCH8, /* type */ 485 0, /* rightshift */ 486 0, /* size (0 = byte, 1 = short, 2 = long) */ 487 8, /* bitsize */ 488 FALSE, /* pc_relative */ 489 0, /* bitpos */ 490 complain_overflow_unsigned, /* complain_on_overflow */ 491 bfd_elf_generic_reloc, /* special_function */ 492 "R_CR16_SWITCH8", /* name */ 493 FALSE, /* partial_inplace */ 494 0x0, /* src_mask */ 495 0xff, /* dst_mask */ 496 TRUE), /* pcrel_offset */ 497 498 /* A 16 bit switch table entry. This is generated for an expression 499 such as ``.word L1 - L2''. The offset holds the difference 500 between the reloc address and L2. */ 501 HOWTO (R_CR16_SWITCH16, /* type */ 502 0, /* rightshift */ 503 1, /* size (0 = byte, 1 = short, 2 = long) */ 504 16, /* bitsize */ 505 FALSE, /* pc_relative */ 506 0, /* bitpos */ 507 complain_overflow_unsigned, /* complain_on_overflow */ 508 bfd_elf_generic_reloc, /* special_function */ 509 "R_CR16_SWITCH16", /* name */ 510 FALSE, /* partial_inplace */ 511 0x0, /* src_mask */ 512 0xffff, /* dst_mask */ 513 TRUE), /* pcrel_offset */ 514 515 /* A 32 bit switch table entry. This is generated for an expression 516 such as ``.long L1 - L2''. The offset holds the difference 517 between the reloc address and L2. */ 518 HOWTO (R_CR16_SWITCH32, /* type */ 519 0, /* rightshift */ 520 2, /* size (0 = byte, 1 = short, 2 = long) */ 521 32, /* bitsize */ 522 FALSE, /* pc_relative */ 523 0, /* bitpos */ 524 complain_overflow_unsigned, /* complain_on_overflow */ 525 bfd_elf_generic_reloc, /* special_function */ 526 "R_CR16_SWITCH32", /* name */ 527 FALSE, /* partial_inplace */ 528 0x0, /* src_mask */ 529 0xffffffff, /* dst_mask */ 530 TRUE), /* pcrel_offset */ 531 532 HOWTO (R_CR16_GOT_REGREL20, /* type */ 533 0, /* rightshift */ 534 2, /* size */ 535 20, /* bitsize */ 536 FALSE, /* pc_relative */ 537 0, /* bitpos */ 538 complain_overflow_bitfield,/* complain_on_overflow */ 539 bfd_elf_generic_reloc, /* special_function */ 540 "R_CR16_GOT_REGREL20", /* name */ 541 TRUE, /* partial_inplace */ 542 0x0, /* src_mask */ 543 0xfffff, /* dst_mask */ 544 FALSE), /* pcrel_offset */ 545 546 HOWTO (R_CR16_GOTC_REGREL20, /* type */ 547 0, /* rightshift */ 548 2, /* size */ 549 20, /* bitsize */ 550 FALSE, /* pc_relative */ 551 0, /* bitpos */ 552 complain_overflow_bitfield,/* complain_on_overflow */ 553 bfd_elf_generic_reloc, /* special_function */ 554 "R_CR16_GOTC_REGREL20", /* name */ 555 TRUE, /* partial_inplace */ 556 0x0, /* src_mask */ 557 0xfffff, /* dst_mask */ 558 FALSE), /* pcrel_offset */ 559 560 HOWTO (R_CR16_GLOB_DAT, /* type */ 561 0, /* rightshift */ 562 2, /* size (0 = byte, 1 = short, 2 = long) */ 563 32, /* bitsize */ 564 FALSE, /* pc_relative */ 565 0, /* bitpos */ 566 complain_overflow_unsigned, /* complain_on_overflow */ 567 bfd_elf_generic_reloc, /* special_function */ 568 "R_CR16_GLOB_DAT", /* name */ 569 FALSE, /* partial_inplace */ 570 0x0, /* src_mask */ 571 0xffffffff, /* dst_mask */ 572 TRUE) /* pcrel_offset */ 573 }; 574 575 576 /* Create the GOT section. */ 577 578 static bfd_boolean 579 _bfd_cr16_elf_create_got_section (bfd * abfd, struct bfd_link_info * info) 580 { 581 flagword flags; 582 asection * s; 583 struct elf_link_hash_entry * h; 584 const struct elf_backend_data * bed = get_elf_backend_data (abfd); 585 int ptralign; 586 587 /* This function may be called more than once. */ 588 if (bfd_get_linker_section (abfd, ".got") != NULL) 589 return TRUE; 590 591 switch (bed->s->arch_size) 592 { 593 case 16: 594 ptralign = 1; 595 break; 596 597 case 32: 598 ptralign = 2; 599 break; 600 601 default: 602 bfd_set_error (bfd_error_bad_value); 603 return FALSE; 604 } 605 606 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 607 | SEC_LINKER_CREATED); 608 609 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); 610 if (s == NULL 611 || ! bfd_set_section_alignment (abfd, s, ptralign)) 612 return FALSE; 613 614 if (bed->want_got_plt) 615 { 616 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); 617 if (s == NULL 618 || ! bfd_set_section_alignment (abfd, s, ptralign)) 619 return FALSE; 620 } 621 622 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got 623 (or .got.plt) section. We don't do this in the linker script 624 because we don't want to define the symbol if we are not creating 625 a global offset table. */ 626 h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_"); 627 elf_hash_table (info)->hgot = h; 628 if (h == NULL) 629 return FALSE; 630 631 /* The first bit of the global offset table is the header. */ 632 s->size += bed->got_header_size; 633 634 return TRUE; 635 } 636 637 638 /* Retrieve a howto ptr using a BFD reloc_code. */ 639 640 static reloc_howto_type * 641 elf_cr16_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 642 bfd_reloc_code_real_type code) 643 { 644 unsigned int i; 645 646 for (i = 0; i < R_CR16_MAX; i++) 647 if (code == cr16_reloc_map[i].bfd_reloc_enum) 648 return &cr16_elf_howto_table[cr16_reloc_map[i].cr16_reloc_type]; 649 650 _bfd_error_handler ("Unsupported CR16 relocation type: 0x%x\n", code); 651 return NULL; 652 } 653 654 static reloc_howto_type * 655 elf_cr16_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 656 const char *r_name) 657 { 658 unsigned int i; 659 660 for (i = 0; ARRAY_SIZE (cr16_elf_howto_table); i++) 661 if (cr16_elf_howto_table[i].name != NULL 662 && strcasecmp (cr16_elf_howto_table[i].name, r_name) == 0) 663 return cr16_elf_howto_table + i; 664 665 return NULL; 666 } 667 668 /* Retrieve a howto ptr using an internal relocation entry. */ 669 670 static void 671 elf_cr16_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, 672 Elf_Internal_Rela *dst) 673 { 674 unsigned int r_type = ELF32_R_TYPE (dst->r_info); 675 676 BFD_ASSERT (r_type < (unsigned int) R_CR16_MAX); 677 cache_ptr->howto = cr16_elf_howto_table + r_type; 678 } 679 680 /* Look through the relocs for a section during the first phase. 681 Since we don't do .gots or .plts, we just need to consider the 682 virtual table relocs for gc. */ 683 684 static bfd_boolean 685 cr16_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec, 686 const Elf_Internal_Rela *relocs) 687 { 688 Elf_Internal_Shdr *symtab_hdr; 689 Elf_Internal_Sym * isymbuf = NULL; 690 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; 691 const Elf_Internal_Rela *rel; 692 const Elf_Internal_Rela *rel_end; 693 bfd * dynobj; 694 bfd_vma * local_got_offsets; 695 asection * sgot; 696 asection * srelgot; 697 698 sgot = NULL; 699 srelgot = NULL; 700 bfd_boolean result = FALSE; 701 702 if (info->relocatable) 703 return TRUE; 704 705 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 706 sym_hashes = elf_sym_hashes (abfd); 707 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); 708 if (!elf_bad_symtab (abfd)) 709 sym_hashes_end -= symtab_hdr->sh_info; 710 711 dynobj = elf_hash_table (info)->dynobj; 712 local_got_offsets = elf_local_got_offsets (abfd); 713 rel_end = relocs + sec->reloc_count; 714 for (rel = relocs; rel < rel_end; rel++) 715 { 716 struct elf_link_hash_entry *h; 717 unsigned long r_symndx; 718 719 r_symndx = ELF32_R_SYM (rel->r_info); 720 if (r_symndx < symtab_hdr->sh_info) 721 h = NULL; 722 else 723 { 724 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 725 while (h->root.type == bfd_link_hash_indirect 726 || h->root.type == bfd_link_hash_warning) 727 h = (struct elf_link_hash_entry *) h->root.u.i.link; 728 729 /* PR15323, ref flags aren't set for references in the same 730 object. */ 731 h->root.non_ir_ref = 1; 732 } 733 734 /* Some relocs require a global offset table. */ 735 if (dynobj == NULL) 736 { 737 switch (ELF32_R_TYPE (rel->r_info)) 738 { 739 case R_CR16_GOT_REGREL20: 740 case R_CR16_GOTC_REGREL20: 741 elf_hash_table (info)->dynobj = dynobj = abfd; 742 if (! _bfd_cr16_elf_create_got_section (dynobj, info)) 743 goto fail; 744 break; 745 746 default: 747 break; 748 } 749 } 750 751 switch (ELF32_R_TYPE (rel->r_info)) 752 { 753 case R_CR16_GOT_REGREL20: 754 case R_CR16_GOTC_REGREL20: 755 /* This symbol requires a global offset table entry. */ 756 757 if (sgot == NULL) 758 { 759 sgot = bfd_get_linker_section (dynobj, ".got"); 760 BFD_ASSERT (sgot != NULL); 761 } 762 763 if (srelgot == NULL 764 && (h != NULL || info->executable)) 765 { 766 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 767 if (srelgot == NULL) 768 { 769 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 770 | SEC_IN_MEMORY | SEC_LINKER_CREATED 771 | SEC_READONLY); 772 srelgot = bfd_make_section_anyway_with_flags (dynobj, 773 ".rela.got", 774 flags); 775 if (srelgot == NULL 776 || ! bfd_set_section_alignment (dynobj, srelgot, 2)) 777 goto fail; 778 } 779 } 780 781 if (h != NULL) 782 { 783 if (h->got.offset != (bfd_vma) -1) 784 /* We have already allocated space in the .got. */ 785 break; 786 787 h->got.offset = sgot->size; 788 789 /* Make sure this symbol is output as a dynamic symbol. */ 790 if (h->dynindx == -1) 791 { 792 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 793 goto fail; 794 } 795 796 srelgot->size += sizeof (Elf32_External_Rela); 797 } 798 else 799 { 800 /* This is a global offset table entry for a local 801 symbol. */ 802 if (local_got_offsets == NULL) 803 { 804 size_t size; 805 unsigned int i; 806 807 size = symtab_hdr->sh_info * sizeof (bfd_vma); 808 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); 809 810 if (local_got_offsets == NULL) 811 goto fail; 812 813 elf_local_got_offsets (abfd) = local_got_offsets; 814 815 for (i = 0; i < symtab_hdr->sh_info; i++) 816 local_got_offsets[i] = (bfd_vma) -1; 817 } 818 819 if (local_got_offsets[r_symndx] != (bfd_vma) -1) 820 /* We have already allocated space in the .got. */ 821 break; 822 823 local_got_offsets[r_symndx] = sgot->size; 824 825 if (info->executable) 826 /* If we are generating a shared object, we need to 827 output a R_CR16_RELATIVE reloc so that the dynamic 828 linker can adjust this GOT entry. */ 829 srelgot->size += sizeof (Elf32_External_Rela); 830 } 831 832 sgot->size += 4; 833 break; 834 835 } 836 } 837 838 result = TRUE; 839 fail: 840 if (isymbuf != NULL) 841 free (isymbuf); 842 843 return result; 844 } 845 846 /* Perform a relocation as part of a final link. */ 847 848 static bfd_reloc_status_type 849 cr16_elf_final_link_relocate (reloc_howto_type *howto, 850 bfd *input_bfd, 851 bfd *output_bfd ATTRIBUTE_UNUSED, 852 asection *input_section, 853 bfd_byte *contents, 854 bfd_vma offset, 855 bfd_vma Rvalue, 856 bfd_vma addend, 857 struct elf_link_hash_entry * h, 858 unsigned long symndx ATTRIBUTE_UNUSED, 859 struct bfd_link_info *info ATTRIBUTE_UNUSED, 860 asection *sec ATTRIBUTE_UNUSED, 861 int is_local ATTRIBUTE_UNUSED) 862 { 863 unsigned short r_type = howto->type; 864 bfd_byte *hit_data = contents + offset; 865 bfd_vma reloc_bits, check, Rvalue1; 866 bfd * dynobj; 867 868 dynobj = elf_hash_table (info)->dynobj; 869 870 switch (r_type) 871 { 872 case R_CR16_IMM4: 873 case R_CR16_IMM20: 874 case R_CR16_ABS20: 875 break; 876 877 case R_CR16_IMM8: 878 case R_CR16_IMM16: 879 case R_CR16_IMM32: 880 case R_CR16_IMM32a: 881 case R_CR16_REGREL4: 882 case R_CR16_REGREL4a: 883 case R_CR16_REGREL14: 884 case R_CR16_REGREL14a: 885 case R_CR16_REGREL16: 886 case R_CR16_REGREL20: 887 case R_CR16_REGREL20a: 888 case R_CR16_GOT_REGREL20: 889 case R_CR16_GOTC_REGREL20: 890 case R_CR16_ABS24: 891 case R_CR16_DISP16: 892 case R_CR16_DISP24: 893 /* 'hit_data' is relative to the start of the instruction, not the 894 relocation offset. Advance it to account for the exact offset. */ 895 hit_data += 2; 896 break; 897 898 case R_CR16_NONE: 899 return bfd_reloc_ok; 900 break; 901 902 case R_CR16_DISP4: 903 if (is_local) 904 Rvalue += -1; 905 break; 906 907 case R_CR16_DISP8: 908 case R_CR16_DISP24a: 909 if (is_local) 910 Rvalue -= -1; 911 break; 912 913 case R_CR16_SWITCH8: 914 case R_CR16_SWITCH16: 915 case R_CR16_SWITCH32: 916 /* We only care about the addend, where the difference between 917 expressions is kept. */ 918 Rvalue = 0; 919 920 default: 921 break; 922 } 923 924 if (howto->pc_relative) 925 { 926 /* Subtract the address of the section containing the location. */ 927 Rvalue -= (input_section->output_section->vma 928 + input_section->output_offset); 929 /* Subtract the position of the location within the section. */ 930 Rvalue -= offset; 931 } 932 933 /* Add in supplied addend. */ 934 Rvalue += addend; 935 936 /* Complain if the bitfield overflows, whether it is considered 937 as signed or unsigned. */ 938 check = Rvalue >> howto->rightshift; 939 940 /* Assumes two's complement. This expression avoids 941 overflow if howto->bitsize is the number of bits in 942 bfd_vma. */ 943 reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1; 944 945 /* For GOT and GOTC relocs no boundary checks applied. */ 946 if (!((r_type == R_CR16_GOT_REGREL20) 947 || (r_type == R_CR16_GOTC_REGREL20))) 948 { 949 if (((bfd_vma) check & ~reloc_bits) != 0 950 && (((bfd_vma) check & ~reloc_bits) 951 != (-(bfd_vma) 1 & ~reloc_bits))) 952 { 953 /* The above right shift is incorrect for a signed 954 value. See if turning on the upper bits fixes the 955 overflow. */ 956 if (howto->rightshift && (bfd_signed_vma) Rvalue < 0) 957 { 958 check |= ((bfd_vma) - 1 959 & ~((bfd_vma) - 1 960 >> howto->rightshift)); 961 962 if (((bfd_vma) check & ~reloc_bits) 963 != (-(bfd_vma) 1 & ~reloc_bits)) 964 return bfd_reloc_overflow; 965 } 966 else 967 return bfd_reloc_overflow; 968 } 969 970 /* Drop unwanted bits from the value we are relocating to. */ 971 Rvalue >>= (bfd_vma) howto->rightshift; 972 973 /* Apply dst_mask to select only relocatable part of the insn. */ 974 Rvalue &= howto->dst_mask; 975 } 976 977 switch (howto->size) 978 { 979 case 0: 980 if (r_type == R_CR16_DISP8) 981 { 982 Rvalue1 = bfd_get_16 (input_bfd, hit_data); 983 Rvalue = ((Rvalue1 & 0xf000) | ((Rvalue << 4) & 0xf00) 984 | (Rvalue1 & 0x00f0) | (Rvalue & 0xf)); 985 bfd_put_16 (input_bfd, Rvalue, hit_data); 986 } 987 else if (r_type == R_CR16_IMM4) 988 { 989 Rvalue1 = bfd_get_16 (input_bfd, hit_data); 990 Rvalue = (((Rvalue1 & 0xff) << 8) | ((Rvalue << 4) & 0xf0) 991 | ((Rvalue1 & 0x0f00) >> 8)); 992 bfd_put_16 (input_bfd, Rvalue, hit_data); 993 } 994 else if (r_type == R_CR16_DISP4) 995 { 996 Rvalue1 = bfd_get_16 (input_bfd, hit_data); 997 Rvalue = (Rvalue1 | ((Rvalue & 0xf) << 4)); 998 bfd_put_16 (input_bfd, Rvalue, hit_data); 999 } 1000 else 1001 { 1002 bfd_put_8 (input_bfd, (unsigned char) Rvalue, hit_data); 1003 } 1004 break; 1005 1006 case 1: 1007 if (r_type == R_CR16_DISP16) 1008 { 1009 Rvalue |= (bfd_get_16 (input_bfd, hit_data)); 1010 Rvalue = ((Rvalue & 0xfffe) | ((Rvalue >> 16) & 0x1)); 1011 } 1012 if (r_type == R_CR16_IMM16) 1013 { 1014 Rvalue1 = bfd_get_16 (input_bfd, hit_data); 1015 1016 /* Add or subtract the offset value. */ 1017 if (Rvalue1 & 0x8000) 1018 Rvalue -= (~Rvalue1 + 1) & 0xffff; 1019 else 1020 Rvalue += Rvalue1; 1021 1022 /* Check for range. */ 1023 if ((long) Rvalue > 0xffff || (long) Rvalue < 0x0) 1024 return bfd_reloc_overflow; 1025 } 1026 1027 bfd_put_16 (input_bfd, Rvalue, hit_data); 1028 break; 1029 1030 case 2: 1031 if ((r_type == R_CR16_ABS20) || (r_type == R_CR16_IMM20)) 1032 { 1033 Rvalue1 = (bfd_get_16 (input_bfd, hit_data + 2) 1034 | (((bfd_get_16 (input_bfd, hit_data) & 0xf) <<16))); 1035 1036 /* Add or subtract the offset value. */ 1037 if (Rvalue1 & 0x80000) 1038 Rvalue -= (~Rvalue1 + 1) & 0xfffff; 1039 else 1040 Rvalue += Rvalue1; 1041 1042 /* Check for range. */ 1043 if ((long) Rvalue > 0xfffff || (long) Rvalue < 0x0) 1044 return bfd_reloc_overflow; 1045 1046 bfd_put_16 (input_bfd, ((bfd_get_16 (input_bfd, hit_data) & 0xfff0) 1047 | ((Rvalue >> 16) & 0xf)), hit_data); 1048 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2); 1049 } 1050 else if (r_type == R_CR16_GOT_REGREL20) 1051 { 1052 asection * sgot = bfd_get_linker_section (dynobj, ".got"); 1053 1054 if (h != NULL) 1055 { 1056 bfd_vma off; 1057 1058 off = h->got.offset; 1059 BFD_ASSERT (off != (bfd_vma) -1); 1060 1061 if (! elf_hash_table (info)->dynamic_sections_created 1062 || SYMBOL_REFERENCES_LOCAL (info, h)) 1063 /* This is actually a static link, or it is a 1064 -Bsymbolic link and the symbol is defined 1065 locally, or the symbol was forced to be local 1066 because of a version file. We must initialize 1067 this entry in the global offset table. 1068 When doing a dynamic link, we create a .rela.got 1069 relocation entry to initialize the value. This 1070 is done in the finish_dynamic_symbol routine. */ 1071 bfd_put_32 (output_bfd, Rvalue, sgot->contents + off); 1072 1073 Rvalue = sgot->output_offset + off; 1074 } 1075 else 1076 { 1077 bfd_vma off; 1078 1079 off = elf_local_got_offsets (input_bfd)[symndx]; 1080 bfd_put_32 (output_bfd,Rvalue, sgot->contents + off); 1081 1082 Rvalue = sgot->output_offset + off; 1083 } 1084 1085 Rvalue += addend; 1086 1087 /* REVISIT: if ((long) Rvalue > 0xffffff || 1088 (long) Rvalue < -0x800000). */ 1089 if ((long) Rvalue > 0xffffff || (long) Rvalue < 0) 1090 return bfd_reloc_overflow; 1091 1092 1093 bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data)) 1094 | (((Rvalue >> 16) & 0xf) << 8), hit_data); 1095 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2); 1096 1097 } 1098 else if (r_type == R_CR16_GOTC_REGREL20) 1099 { 1100 asection * sgot; 1101 sgot = bfd_get_linker_section (dynobj, ".got"); 1102 1103 if (h != NULL) 1104 { 1105 bfd_vma off; 1106 1107 off = h->got.offset; 1108 BFD_ASSERT (off != (bfd_vma) -1); 1109 1110 Rvalue >>=1; /* For code symbols. */ 1111 1112 if (! elf_hash_table (info)->dynamic_sections_created 1113 || SYMBOL_REFERENCES_LOCAL (info, h)) 1114 /* This is actually a static link, or it is a 1115 -Bsymbolic link and the symbol is defined 1116 locally, or the symbol was forced to be local 1117 because of a version file. We must initialize 1118 this entry in the global offset table. 1119 When doing a dynamic link, we create a .rela.got 1120 relocation entry to initialize the value. This 1121 is done in the finish_dynamic_symbol routine. */ 1122 bfd_put_32 (output_bfd, Rvalue, sgot->contents + off); 1123 1124 Rvalue = sgot->output_offset + off; 1125 } 1126 else 1127 { 1128 bfd_vma off; 1129 1130 off = elf_local_got_offsets (input_bfd)[symndx]; 1131 Rvalue >>= 1; 1132 bfd_put_32 (output_bfd,Rvalue, sgot->contents + off); 1133 Rvalue = sgot->output_offset + off; 1134 } 1135 1136 Rvalue += addend; 1137 1138 /* Check if any value in DISP. */ 1139 Rvalue1 =((bfd_get_32 (input_bfd, hit_data) >>16) 1140 | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16)); 1141 1142 /* Add or subtract the offset value. */ 1143 if (Rvalue1 & 0x80000) 1144 Rvalue -= (~Rvalue1 + 1) & 0xfffff; 1145 else 1146 Rvalue += Rvalue1; 1147 1148 /* Check for range. */ 1149 /* REVISIT: if ((long) Rvalue > 0xffffff 1150 || (long) Rvalue < -0x800000). */ 1151 if ((long) Rvalue > 0xffffff || (long) Rvalue < 0) 1152 return bfd_reloc_overflow; 1153 1154 bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data)) 1155 | (((Rvalue >> 16) & 0xf) << 8), hit_data); 1156 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2); 1157 } 1158 else 1159 { 1160 if (r_type == R_CR16_ABS24) 1161 { 1162 Rvalue1 = ((bfd_get_32 (input_bfd, hit_data) >> 16) 1163 | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16) 1164 | (((bfd_get_32 (input_bfd, hit_data) & 0xf) <<20))); 1165 1166 /* Add or subtract the offset value. */ 1167 if (Rvalue1 & 0x800000) 1168 Rvalue -= (~Rvalue1 + 1) & 0xffffff; 1169 else 1170 Rvalue += Rvalue1; 1171 1172 /* Check for Range. */ 1173 if ((long) Rvalue > 0xffffff || (long) Rvalue < 0x0) 1174 return bfd_reloc_overflow; 1175 1176 Rvalue = ((((Rvalue >> 20) & 0xf) | (((Rvalue >> 16) & 0xf)<<8) 1177 | (bfd_get_32 (input_bfd, hit_data) & 0xf0f0)) 1178 | ((Rvalue & 0xffff) << 16)); 1179 } 1180 else if (r_type == R_CR16_DISP24) 1181 { 1182 Rvalue = ((((Rvalue >> 20)& 0xf) | (((Rvalue >>16) & 0xf)<<8) 1183 | (bfd_get_16 (input_bfd, hit_data))) 1184 | (((Rvalue & 0xfffe) | ((Rvalue >> 24) & 0x1)) << 16)); 1185 } 1186 else if ((r_type == R_CR16_IMM32) || (r_type == R_CR16_IMM32a)) 1187 { 1188 Rvalue1 =((((bfd_get_32 (input_bfd, hit_data)) >> 16) &0xffff) 1189 | (((bfd_get_32 (input_bfd, hit_data)) &0xffff)) << 16); 1190 1191 /* Add or subtract the offset value. */ 1192 if (Rvalue1 & 0x80000000) 1193 Rvalue -= (~Rvalue1 + 1) & 0xffffffff; 1194 else 1195 Rvalue += Rvalue1; 1196 1197 /* Check for range. */ 1198 if (Rvalue > 0xffffffff || (long) Rvalue < 0x0) 1199 return bfd_reloc_overflow; 1200 1201 Rvalue = (((Rvalue >> 16)& 0xffff) | (Rvalue & 0xffff) << 16); 1202 } 1203 else if (r_type == R_CR16_DISP24a) 1204 { 1205 Rvalue = (((Rvalue & 0xfffffe) | (Rvalue >> 23))); 1206 Rvalue = ((Rvalue >> 16) & 0xff) | ((Rvalue & 0xffff) << 16) 1207 | (bfd_get_32 (input_bfd, hit_data)); 1208 } 1209 else if ((r_type == R_CR16_REGREL20) 1210 || (r_type == R_CR16_REGREL20a)) 1211 { 1212 Rvalue1 = ((bfd_get_32 (input_bfd, hit_data) >> 16) 1213 | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16)); 1214 /* Add or subtract the offset value. */ 1215 if (Rvalue1 & 0x80000) 1216 Rvalue -= (~Rvalue1 + 1) & 0xfffff; 1217 else 1218 Rvalue += Rvalue1; 1219 1220 /* Check for range. */ 1221 if ((long) Rvalue > 0xfffff || (long) Rvalue < 0x0) 1222 return bfd_reloc_overflow; 1223 1224 Rvalue = (((((Rvalue >> 20)& 0xf) | (((Rvalue >>16) & 0xf)<<8) 1225 | ((Rvalue & 0xffff) << 16))) 1226 | (bfd_get_32 (input_bfd, hit_data) & 0xf0ff)); 1227 1228 } 1229 else if (r_type == R_CR16_NUM32) 1230 { 1231 Rvalue1 = (bfd_get_32 (input_bfd, hit_data)); 1232 1233 /* Add or subtract the offset value */ 1234 if (Rvalue1 & 0x80000000) 1235 Rvalue -= (~Rvalue1 + 1) & 0xffffffff; 1236 else 1237 Rvalue += Rvalue1; 1238 1239 /* Check for Ranga */ 1240 if (Rvalue > 0xffffffff) 1241 return bfd_reloc_overflow; 1242 } 1243 1244 bfd_put_32 (input_bfd, Rvalue, hit_data); 1245 } 1246 break; 1247 1248 default: 1249 return bfd_reloc_notsupported; 1250 } 1251 1252 return bfd_reloc_ok; 1253 } 1254 1255 /* Delete some bytes from a section while relaxing. */ 1256 1257 static bfd_boolean 1258 elf32_cr16_relax_delete_bytes (struct bfd_link_info *link_info, bfd *abfd, 1259 asection *sec, bfd_vma addr, int count) 1260 { 1261 Elf_Internal_Shdr *symtab_hdr; 1262 unsigned int sec_shndx; 1263 bfd_byte *contents; 1264 Elf_Internal_Rela *irel, *irelend; 1265 bfd_vma toaddr; 1266 Elf_Internal_Sym *isym; 1267 Elf_Internal_Sym *isymend; 1268 struct elf_link_hash_entry **sym_hashes; 1269 struct elf_link_hash_entry **end_hashes; 1270 struct elf_link_hash_entry **start_hashes; 1271 unsigned int symcount; 1272 1273 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); 1274 1275 contents = elf_section_data (sec)->this_hdr.contents; 1276 1277 toaddr = sec->size; 1278 1279 irel = elf_section_data (sec)->relocs; 1280 irelend = irel + sec->reloc_count; 1281 1282 /* Actually delete the bytes. */ 1283 memmove (contents + addr, contents + addr + count, 1284 (size_t) (toaddr - addr - count)); 1285 sec->size -= count; 1286 1287 /* Adjust all the relocs. */ 1288 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) 1289 /* Get the new reloc address. */ 1290 if ((irel->r_offset > addr && irel->r_offset < toaddr)) 1291 irel->r_offset -= count; 1292 1293 /* Adjust the local symbols defined in this section. */ 1294 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1295 isym = (Elf_Internal_Sym *) symtab_hdr->contents; 1296 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) 1297 { 1298 if (isym->st_shndx == sec_shndx 1299 && isym->st_value > addr 1300 && isym->st_value < toaddr) 1301 { 1302 /* Adjust the addend of SWITCH relocations in this section, 1303 which reference this local symbol. */ 1304 #if 0 1305 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) 1306 { 1307 unsigned long r_symndx; 1308 Elf_Internal_Sym *rsym; 1309 bfd_vma addsym, subsym; 1310 1311 /* Skip if not a SWITCH relocation. */ 1312 if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH8 1313 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH16 1314 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH32) 1315 continue; 1316 1317 r_symndx = ELF32_R_SYM (irel->r_info); 1318 rsym = (Elf_Internal_Sym *) symtab_hdr->contents + r_symndx; 1319 1320 /* Skip if not the local adjusted symbol. */ 1321 if (rsym != isym) 1322 continue; 1323 1324 addsym = isym->st_value; 1325 subsym = addsym - irel->r_addend; 1326 1327 /* Fix the addend only when -->> (addsym > addr >= subsym). */ 1328 if (subsym <= addr) 1329 irel->r_addend -= count; 1330 else 1331 continue; 1332 } 1333 #endif 1334 1335 isym->st_value -= count; 1336 } 1337 } 1338 1339 /* Now adjust the global symbols defined in this section. */ 1340 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) 1341 - symtab_hdr->sh_info); 1342 sym_hashes = start_hashes = elf_sym_hashes (abfd); 1343 end_hashes = sym_hashes + symcount; 1344 1345 for (; sym_hashes < end_hashes; sym_hashes++) 1346 { 1347 struct elf_link_hash_entry *sym_hash = *sym_hashes; 1348 1349 /* The '--wrap SYMBOL' option is causing a pain when the object file, 1350 containing the definition of __wrap_SYMBOL, includes a direct 1351 call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference 1352 the same symbol (which is __wrap_SYMBOL), but still exist as two 1353 different symbols in 'sym_hashes', we don't want to adjust 1354 the global symbol __wrap_SYMBOL twice. 1355 This check is only relevant when symbols are being wrapped. */ 1356 if (link_info->wrap_hash != NULL) 1357 { 1358 struct elf_link_hash_entry **cur_sym_hashes; 1359 1360 /* Loop only over the symbols whom been already checked. */ 1361 for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes; 1362 cur_sym_hashes++) 1363 /* If the current symbol is identical to 'sym_hash', that means 1364 the symbol was already adjusted (or at least checked). */ 1365 if (*cur_sym_hashes == sym_hash) 1366 break; 1367 1368 /* Don't adjust the symbol again. */ 1369 if (cur_sym_hashes < sym_hashes) 1370 continue; 1371 } 1372 1373 if ((sym_hash->root.type == bfd_link_hash_defined 1374 || sym_hash->root.type == bfd_link_hash_defweak) 1375 && sym_hash->root.u.def.section == sec 1376 && sym_hash->root.u.def.value > addr 1377 && sym_hash->root.u.def.value < toaddr) 1378 sym_hash->root.u.def.value -= count; 1379 } 1380 1381 return TRUE; 1382 } 1383 1384 /* Relocate a CR16 ELF section. */ 1385 1386 static bfd_boolean 1387 elf32_cr16_relocate_section (bfd *output_bfd, struct bfd_link_info *info, 1388 bfd *input_bfd, asection *input_section, 1389 bfd_byte *contents, Elf_Internal_Rela *relocs, 1390 Elf_Internal_Sym *local_syms, 1391 asection **local_sections) 1392 { 1393 Elf_Internal_Shdr *symtab_hdr; 1394 struct elf_link_hash_entry **sym_hashes; 1395 Elf_Internal_Rela *rel, *relend; 1396 1397 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 1398 sym_hashes = elf_sym_hashes (input_bfd); 1399 1400 rel = relocs; 1401 relend = relocs + input_section->reloc_count; 1402 for (; rel < relend; rel++) 1403 { 1404 int r_type; 1405 reloc_howto_type *howto; 1406 unsigned long r_symndx; 1407 Elf_Internal_Sym *sym; 1408 asection *sec; 1409 struct elf_link_hash_entry *h; 1410 bfd_vma relocation; 1411 bfd_reloc_status_type r; 1412 1413 r_symndx = ELF32_R_SYM (rel->r_info); 1414 r_type = ELF32_R_TYPE (rel->r_info); 1415 howto = cr16_elf_howto_table + (r_type); 1416 1417 h = NULL; 1418 sym = NULL; 1419 sec = NULL; 1420 if (r_symndx < symtab_hdr->sh_info) 1421 { 1422 sym = local_syms + r_symndx; 1423 sec = local_sections[r_symndx]; 1424 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 1425 } 1426 else 1427 { 1428 bfd_boolean unresolved_reloc, warned, ignored; 1429 1430 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 1431 r_symndx, symtab_hdr, sym_hashes, 1432 h, sec, relocation, 1433 unresolved_reloc, warned, ignored); 1434 } 1435 1436 if (sec != NULL && discarded_section (sec)) 1437 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 1438 rel, 1, relend, howto, 0, contents); 1439 1440 if (info->relocatable) 1441 continue; 1442 1443 r = cr16_elf_final_link_relocate (howto, input_bfd, output_bfd, 1444 input_section, 1445 contents, rel->r_offset, 1446 relocation, rel->r_addend, 1447 (struct elf_link_hash_entry *) h, 1448 r_symndx, 1449 info, sec, h == NULL); 1450 1451 if (r != bfd_reloc_ok) 1452 { 1453 const char *name; 1454 const char *msg = NULL; 1455 1456 if (h != NULL) 1457 name = h->root.root.string; 1458 else 1459 { 1460 name = (bfd_elf_string_from_elf_section 1461 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 1462 if (name == NULL || *name == '\0') 1463 name = bfd_section_name (input_bfd, sec); 1464 } 1465 1466 switch (r) 1467 { 1468 case bfd_reloc_overflow: 1469 if (!((*info->callbacks->reloc_overflow) 1470 (info, (h ? &h->root : NULL), name, howto->name, 1471 (bfd_vma) 0, input_bfd, input_section, 1472 rel->r_offset))) 1473 return FALSE; 1474 break; 1475 1476 case bfd_reloc_undefined: 1477 if (!((*info->callbacks->undefined_symbol) 1478 (info, name, input_bfd, input_section, 1479 rel->r_offset, TRUE))) 1480 return FALSE; 1481 break; 1482 1483 case bfd_reloc_outofrange: 1484 msg = _("internal error: out of range error"); 1485 goto common_error; 1486 1487 case bfd_reloc_notsupported: 1488 msg = _("internal error: unsupported relocation error"); 1489 goto common_error; 1490 1491 case bfd_reloc_dangerous: 1492 msg = _("internal error: dangerous error"); 1493 goto common_error; 1494 1495 default: 1496 msg = _("internal error: unknown error"); 1497 /* Fall through. */ 1498 1499 common_error: 1500 if (!((*info->callbacks->warning) 1501 (info, msg, name, input_bfd, input_section, 1502 rel->r_offset))) 1503 return FALSE; 1504 break; 1505 } 1506 } 1507 } 1508 1509 return TRUE; 1510 } 1511 1512 /* This is a version of bfd_generic_get_relocated_section_contents 1513 which uses elf32_cr16_relocate_section. */ 1514 1515 static bfd_byte * 1516 elf32_cr16_get_relocated_section_contents (bfd *output_bfd, 1517 struct bfd_link_info *link_info, 1518 struct bfd_link_order *link_order, 1519 bfd_byte *data, 1520 bfd_boolean relocatable, 1521 asymbol **symbols) 1522 { 1523 Elf_Internal_Shdr *symtab_hdr; 1524 asection *input_section = link_order->u.indirect.section; 1525 bfd *input_bfd = input_section->owner; 1526 asection **sections = NULL; 1527 Elf_Internal_Rela *internal_relocs = NULL; 1528 Elf_Internal_Sym *isymbuf = NULL; 1529 1530 /* We only need to handle the case of relaxing, or of having a 1531 particular set of section contents, specially. */ 1532 if (relocatable 1533 || elf_section_data (input_section)->this_hdr.contents == NULL) 1534 return bfd_generic_get_relocated_section_contents (output_bfd, link_info, 1535 link_order, data, 1536 relocatable, 1537 symbols); 1538 1539 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 1540 1541 memcpy (data, elf_section_data (input_section)->this_hdr.contents, 1542 (size_t) input_section->size); 1543 1544 if ((input_section->flags & SEC_RELOC) != 0 1545 && input_section->reloc_count > 0) 1546 { 1547 Elf_Internal_Sym *isym; 1548 Elf_Internal_Sym *isymend; 1549 asection **secpp; 1550 bfd_size_type amt; 1551 1552 internal_relocs = _bfd_elf_link_read_relocs (input_bfd, input_section, 1553 NULL, NULL, FALSE); 1554 if (internal_relocs == NULL) 1555 goto error_return; 1556 1557 if (symtab_hdr->sh_info != 0) 1558 { 1559 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 1560 if (isymbuf == NULL) 1561 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, 1562 symtab_hdr->sh_info, 0, 1563 NULL, NULL, NULL); 1564 if (isymbuf == NULL) 1565 goto error_return; 1566 } 1567 1568 amt = symtab_hdr->sh_info; 1569 amt *= sizeof (asection *); 1570 sections = bfd_malloc (amt); 1571 if (sections == NULL && amt != 0) 1572 goto error_return; 1573 1574 isymend = isymbuf + symtab_hdr->sh_info; 1575 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) 1576 { 1577 asection *isec; 1578 1579 if (isym->st_shndx == SHN_UNDEF) 1580 isec = bfd_und_section_ptr; 1581 else if (isym->st_shndx == SHN_ABS) 1582 isec = bfd_abs_section_ptr; 1583 else if (isym->st_shndx == SHN_COMMON) 1584 isec = bfd_com_section_ptr; 1585 else 1586 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); 1587 1588 *secpp = isec; 1589 } 1590 1591 if (! elf32_cr16_relocate_section (output_bfd, link_info, input_bfd, 1592 input_section, data, internal_relocs, 1593 isymbuf, sections)) 1594 goto error_return; 1595 1596 if (sections != NULL) 1597 free (sections); 1598 if (isymbuf != NULL 1599 && symtab_hdr->contents != (unsigned char *) isymbuf) 1600 free (isymbuf); 1601 if (elf_section_data (input_section)->relocs != internal_relocs) 1602 free (internal_relocs); 1603 } 1604 1605 return data; 1606 1607 error_return: 1608 if (sections != NULL) 1609 free (sections); 1610 if (isymbuf != NULL 1611 && symtab_hdr->contents != (unsigned char *) isymbuf) 1612 free (isymbuf); 1613 if (internal_relocs != NULL 1614 && elf_section_data (input_section)->relocs != internal_relocs) 1615 free (internal_relocs); 1616 return NULL; 1617 } 1618 1619 /* Assorted hash table functions. */ 1620 1621 /* Initialize an entry in the link hash table. */ 1622 1623 /* Create an entry in an CR16 ELF linker hash table. */ 1624 1625 static struct bfd_hash_entry * 1626 elf32_cr16_link_hash_newfunc (struct bfd_hash_entry *entry, 1627 struct bfd_hash_table *table, 1628 const char *string) 1629 { 1630 struct elf32_cr16_link_hash_entry *ret = 1631 (struct elf32_cr16_link_hash_entry *) entry; 1632 1633 /* Allocate the structure if it has not already been allocated by a 1634 subclass. */ 1635 if (ret == (struct elf32_cr16_link_hash_entry *) NULL) 1636 ret = ((struct elf32_cr16_link_hash_entry *) 1637 bfd_hash_allocate (table, 1638 sizeof (struct elf32_cr16_link_hash_entry))); 1639 if (ret == (struct elf32_cr16_link_hash_entry *) NULL) 1640 return (struct bfd_hash_entry *) ret; 1641 1642 /* Call the allocation method of the superclass. */ 1643 ret = ((struct elf32_cr16_link_hash_entry *) 1644 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 1645 table, string)); 1646 if (ret != (struct elf32_cr16_link_hash_entry *) NULL) 1647 { 1648 ret->direct_calls = 0; 1649 ret->stack_size = 0; 1650 ret->movm_args = 0; 1651 ret->movm_stack_size = 0; 1652 ret->flags = 0; 1653 ret->value = 0; 1654 } 1655 1656 return (struct bfd_hash_entry *) ret; 1657 } 1658 1659 /* Create an cr16 ELF linker hash table. */ 1660 1661 static struct bfd_link_hash_table * 1662 elf32_cr16_link_hash_table_create (bfd *abfd) 1663 { 1664 struct elf_link_hash_table *ret; 1665 bfd_size_type amt = sizeof (struct elf_link_hash_table); 1666 1667 ret = (struct elf_link_hash_table *) bfd_zmalloc (amt); 1668 if (ret == (struct elf_link_hash_table *) NULL) 1669 return NULL; 1670 1671 if (!_bfd_elf_link_hash_table_init (ret, abfd, 1672 elf32_cr16_link_hash_newfunc, 1673 sizeof (struct elf32_cr16_link_hash_entry), 1674 GENERIC_ELF_DATA)) 1675 { 1676 free (ret); 1677 return NULL; 1678 } 1679 1680 return &ret->root; 1681 } 1682 1683 static unsigned long 1684 elf_cr16_mach (flagword flags) 1685 { 1686 switch (flags) 1687 { 1688 case EM_CR16: 1689 default: 1690 return bfd_mach_cr16; 1691 } 1692 } 1693 1694 /* The final processing done just before writing out a CR16 ELF object 1695 file. This gets the CR16 architecture right based on the machine 1696 number. */ 1697 1698 static void 1699 _bfd_cr16_elf_final_write_processing (bfd *abfd, 1700 bfd_boolean linker ATTRIBUTE_UNUSED) 1701 { 1702 unsigned long val; 1703 switch (bfd_get_mach (abfd)) 1704 { 1705 default: 1706 case bfd_mach_cr16: 1707 val = EM_CR16; 1708 break; 1709 } 1710 1711 1712 elf_elfheader (abfd)->e_flags |= val; 1713 } 1714 1715 1716 static bfd_boolean 1717 _bfd_cr16_elf_object_p (bfd *abfd) 1718 { 1719 bfd_default_set_arch_mach (abfd, bfd_arch_cr16, 1720 elf_cr16_mach (elf_elfheader (abfd)->e_flags)); 1721 return TRUE; 1722 } 1723 1724 /* Merge backend specific data from an object file to the output 1725 object file when linking. */ 1726 1727 static bfd_boolean 1728 _bfd_cr16_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 1729 { 1730 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 1731 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 1732 return TRUE; 1733 1734 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) 1735 && bfd_get_mach (obfd) < bfd_get_mach (ibfd)) 1736 { 1737 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), 1738 bfd_get_mach (ibfd))) 1739 return FALSE; 1740 } 1741 1742 return TRUE; 1743 } 1744 1745 1746 /* This function handles relaxing for the CR16. 1747 1748 There's quite a few relaxing opportunites available on the CR16: 1749 1750 * bcond:24 -> bcond:16 1 byte 1751 * bcond:16 -> bcond:8 1 byte 1752 * arithmetic imm32 -> arithmetic imm20 12 bits 1753 * arithmetic imm20/imm16 -> arithmetic imm4 12/16 bits 1754 1755 Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */ 1756 1757 static bfd_boolean 1758 elf32_cr16_relax_section (bfd *abfd, asection *sec, 1759 struct bfd_link_info *link_info, bfd_boolean *again) 1760 { 1761 Elf_Internal_Shdr *symtab_hdr; 1762 Elf_Internal_Rela *internal_relocs; 1763 Elf_Internal_Rela *irel, *irelend; 1764 bfd_byte *contents = NULL; 1765 Elf_Internal_Sym *isymbuf = NULL; 1766 1767 /* Assume nothing changes. */ 1768 *again = FALSE; 1769 1770 /* We don't have to do anything for a relocatable link, if 1771 this section does not have relocs, or if this is not a 1772 code section. */ 1773 if (link_info->relocatable 1774 || (sec->flags & SEC_RELOC) == 0 1775 || sec->reloc_count == 0 1776 || (sec->flags & SEC_CODE) == 0) 1777 return TRUE; 1778 1779 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1780 1781 /* Get a copy of the native relocations. */ 1782 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, 1783 link_info->keep_memory); 1784 if (internal_relocs == NULL) 1785 goto error_return; 1786 1787 /* Walk through them looking for relaxing opportunities. */ 1788 irelend = internal_relocs + sec->reloc_count; 1789 for (irel = internal_relocs; irel < irelend; irel++) 1790 { 1791 bfd_vma symval; 1792 1793 /* If this isn't something that can be relaxed, then ignore 1794 this reloc. */ 1795 if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP16 1796 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP24 1797 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM32 1798 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM20 1799 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM16) 1800 continue; 1801 1802 /* Get the section contents if we haven't done so already. */ 1803 if (contents == NULL) 1804 { 1805 /* Get cached copy if it exists. */ 1806 if (elf_section_data (sec)->this_hdr.contents != NULL) 1807 contents = elf_section_data (sec)->this_hdr.contents; 1808 /* Go get them off disk. */ 1809 else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) 1810 goto error_return; 1811 } 1812 1813 /* Read this BFD's local symbols if we haven't done so already. */ 1814 if (isymbuf == NULL && symtab_hdr->sh_info != 0) 1815 { 1816 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 1817 if (isymbuf == NULL) 1818 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 1819 symtab_hdr->sh_info, 0, 1820 NULL, NULL, NULL); 1821 if (isymbuf == NULL) 1822 goto error_return; 1823 } 1824 1825 /* Get the value of the symbol referred to by the reloc. */ 1826 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 1827 { 1828 /* A local symbol. */ 1829 Elf_Internal_Sym *isym; 1830 asection *sym_sec; 1831 1832 isym = isymbuf + ELF32_R_SYM (irel->r_info); 1833 if (isym->st_shndx == SHN_UNDEF) 1834 sym_sec = bfd_und_section_ptr; 1835 else if (isym->st_shndx == SHN_ABS) 1836 sym_sec = bfd_abs_section_ptr; 1837 else if (isym->st_shndx == SHN_COMMON) 1838 sym_sec = bfd_com_section_ptr; 1839 else 1840 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); 1841 symval = (isym->st_value 1842 + sym_sec->output_section->vma 1843 + sym_sec->output_offset); 1844 } 1845 else 1846 { 1847 unsigned long indx; 1848 struct elf_link_hash_entry *h; 1849 1850 /* An external symbol. */ 1851 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 1852 h = elf_sym_hashes (abfd)[indx]; 1853 BFD_ASSERT (h != NULL); 1854 1855 if (h->root.type != bfd_link_hash_defined 1856 && h->root.type != bfd_link_hash_defweak) 1857 /* This appears to be a reference to an undefined 1858 symbol. Just ignore it--it will be caught by the 1859 regular reloc processing. */ 1860 continue; 1861 1862 symval = (h->root.u.def.value 1863 + h->root.u.def.section->output_section->vma 1864 + h->root.u.def.section->output_offset); 1865 } 1866 1867 /* For simplicity of coding, we are going to modify the section 1868 contents, the section relocs, and the BFD symbol table. We 1869 must tell the rest of the code not to free up this 1870 information. It would be possible to instead create a table 1871 of changes which have to be made, as is done in coff-mips.c; 1872 that would be more work, but would require less memory when 1873 the linker is run. */ 1874 1875 /* Try to turn a 24 branch/call into a 16bit relative 1876 branch/call. */ 1877 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP24) 1878 { 1879 bfd_vma value = symval; 1880 1881 /* Deal with pc-relative gunk. */ 1882 value -= (sec->output_section->vma + sec->output_offset); 1883 value -= irel->r_offset; 1884 value += irel->r_addend; 1885 1886 /* See if the value will fit in 16 bits, note the high value is 1887 0xfffe + 2 as the target will be two bytes closer if we are 1888 able to relax. */ 1889 if ((long) value < 0x10000 && (long) value > -0x10002) 1890 { 1891 unsigned int code; 1892 1893 /* Get the opcode. */ 1894 code = (unsigned int) bfd_get_32 (abfd, contents + irel->r_offset); 1895 1896 /* Verify it's a 'bcond' and fix the opcode. */ 1897 if ((code & 0xffff) == 0x0010) 1898 bfd_put_16 (abfd, 0x1800 | ((0xf & (code >> 20)) << 4), contents + irel->r_offset); 1899 else 1900 continue; 1901 1902 /* Note that we've changed the relocs, section contents, etc. */ 1903 elf_section_data (sec)->relocs = internal_relocs; 1904 elf_section_data (sec)->this_hdr.contents = contents; 1905 symtab_hdr->contents = (unsigned char *) isymbuf; 1906 1907 /* Fix the relocation's type. */ 1908 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 1909 R_CR16_DISP16); 1910 1911 /* Delete two bytes of data. */ 1912 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, 1913 irel->r_offset + 2, 2)) 1914 goto error_return; 1915 1916 /* That will change things, so, we should relax again. 1917 Note that this is not required, and it may be slow. */ 1918 *again = TRUE; 1919 } 1920 } 1921 1922 /* Try to turn a 16bit pc-relative branch into an 1923 8bit pc-relative branch. */ 1924 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP16) 1925 { 1926 bfd_vma value = symval; 1927 1928 /* Deal with pc-relative gunk. */ 1929 value -= (sec->output_section->vma + sec->output_offset); 1930 value -= irel->r_offset; 1931 value += irel->r_addend; 1932 1933 /* See if the value will fit in 8 bits, note the high value is 1934 0xfc + 2 as the target will be two bytes closer if we are 1935 able to relax. */ 1936 /*if ((long) value < 0x1fa && (long) value > -0x100) REVISIT:range */ 1937 if ((long) value < 0xfa && (long) value > -0x100) 1938 { 1939 unsigned short code; 1940 1941 /* Get the opcode. */ 1942 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); 1943 1944 /* Verify it's a 'bcond' and fix the opcode. */ 1945 if ((code & 0xff0f) == 0x1800) 1946 bfd_put_16 (abfd, (code & 0xf0f0), contents + irel->r_offset); 1947 else 1948 continue; 1949 1950 /* Note that we've changed the relocs, section contents, etc. */ 1951 elf_section_data (sec)->relocs = internal_relocs; 1952 elf_section_data (sec)->this_hdr.contents = contents; 1953 symtab_hdr->contents = (unsigned char *) isymbuf; 1954 1955 /* Fix the relocation's type. */ 1956 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 1957 R_CR16_DISP8); 1958 1959 /* Delete two bytes of data. */ 1960 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, 1961 irel->r_offset + 2, 2)) 1962 goto error_return; 1963 1964 /* That will change things, so, we should relax again. 1965 Note that this is not required, and it may be slow. */ 1966 *again = TRUE; 1967 } 1968 } 1969 1970 /* Try to turn a 32-bit IMM address into a 20/16-bit IMM address */ 1971 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM32) 1972 { 1973 bfd_vma value = symval; 1974 unsigned short is_add_mov = 0; 1975 bfd_vma value1 = 0; 1976 1977 /* Get the existing value from the mcode */ 1978 value1 = ((bfd_get_32 (abfd, contents + irel->r_offset + 2) >> 16) 1979 |(((bfd_get_32 (abfd, contents + irel->r_offset + 2) & 0xffff) << 16))); 1980 1981 /* See if the value will fit in 20 bits. */ 1982 if ((long) (value + value1) < 0xfffff && (long) (value + value1) > 0) 1983 { 1984 unsigned short code; 1985 1986 /* Get the opcode. */ 1987 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); 1988 1989 /* Verify it's a 'arithmetic ADDD or MOVD instruction'. 1990 For ADDD and MOVD only, convert to IMM32 -> IMM20. */ 1991 1992 if (((code & 0xfff0) == 0x0070) || ((code & 0xfff0) == 0x0020)) 1993 is_add_mov = 1; 1994 1995 if (is_add_mov) 1996 { 1997 /* Note that we've changed the relocs, section contents, 1998 etc. */ 1999 elf_section_data (sec)->relocs = internal_relocs; 2000 elf_section_data (sec)->this_hdr.contents = contents; 2001 symtab_hdr->contents = (unsigned char *) isymbuf; 2002 2003 /* Fix the opcode. */ 2004 if ((code & 0xfff0) == 0x0070) /* For movd. */ 2005 bfd_put_8 (abfd, 0x05, contents + irel->r_offset + 1); 2006 else /* code == 0x0020 for addd. */ 2007 bfd_put_8 (abfd, 0x04, contents + irel->r_offset + 1); 2008 2009 bfd_put_8 (abfd, (code & 0xf) << 4, contents + irel->r_offset); 2010 2011 /* If existing value is nagavive adjust approriately 2012 place the 16-20bits (ie 4 bit) in new opcode, 2013 as the 0xffffxxxx, the higher 2 byte values removed. */ 2014 if (value1 & 0x80000000) 2015 bfd_put_8 (abfd, (0x0f | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset); 2016 else 2017 bfd_put_8 (abfd, (((value1 >> 16)&0xf) | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset); 2018 2019 /* Fix the relocation's type. */ 2020 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 2021 R_CR16_IMM20); 2022 2023 /* Delete two bytes of data. */ 2024 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, 2025 irel->r_offset + 2, 2)) 2026 goto error_return; 2027 2028 /* That will change things, so, we should relax again. 2029 Note that this is not required, and it may be slow. */ 2030 *again = TRUE; 2031 } 2032 } 2033 2034 /* See if the value will fit in 16 bits. */ 2035 if ((!is_add_mov) 2036 && ((long)(value + value1) < 0x7fff && (long)(value + value1) > 0)) 2037 { 2038 unsigned short code; 2039 2040 /* Get the opcode. */ 2041 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); 2042 2043 /* Note that we've changed the relocs, section contents, etc. */ 2044 elf_section_data (sec)->relocs = internal_relocs; 2045 elf_section_data (sec)->this_hdr.contents = contents; 2046 symtab_hdr->contents = (unsigned char *) isymbuf; 2047 2048 /* Fix the opcode. */ 2049 if ((code & 0xf0) == 0x70) /* For movd. */ 2050 bfd_put_8 (abfd, 0x54, contents + irel->r_offset + 1); 2051 else if ((code & 0xf0) == 0x20) /* For addd. */ 2052 bfd_put_8 (abfd, 0x60, contents + irel->r_offset + 1); 2053 else if ((code & 0xf0) == 0x90) /* For cmpd. */ 2054 bfd_put_8 (abfd, 0x56, contents + irel->r_offset + 1); 2055 else 2056 continue; 2057 2058 bfd_put_8 (abfd, 0xb0 | (code & 0xf), contents + irel->r_offset); 2059 2060 /* If existing value is nagavive adjust approriately 2061 place the 12-16bits (ie 4 bit) in new opcode, 2062 as the 0xfffffxxx, the higher 2 byte values removed. */ 2063 if (value1 & 0x80000000) 2064 bfd_put_8 (abfd, (0x0f | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset); 2065 else 2066 bfd_put_16 (abfd, value1, contents + irel->r_offset + 2); 2067 2068 2069 /* Fix the relocation's type. */ 2070 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 2071 R_CR16_IMM16); 2072 2073 /* Delete two bytes of data. */ 2074 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, 2075 irel->r_offset + 2, 2)) 2076 goto error_return; 2077 2078 /* That will change things, so, we should relax again. 2079 Note that this is not required, and it may be slow. */ 2080 *again = TRUE; 2081 } 2082 } 2083 2084 #if 0 2085 /* Try to turn a 16bit immediate address into a 4bit 2086 immediate address. */ 2087 if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20) 2088 || (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM16)) 2089 { 2090 bfd_vma value = symval; 2091 bfd_vma value1 = 0; 2092 2093 /* Get the existing value from the mcode */ 2094 value1 = ((bfd_get_16 (abfd, contents + irel->r_offset + 2) & 0xffff)); 2095 2096 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20) 2097 { 2098 value1 |= ((bfd_get_16 (abfd, contents + irel->r_offset + 1) & 0xf000) << 0x4); 2099 } 2100 2101 /* See if the value will fit in 4 bits. */ 2102 if ((((long) (value + value1)) < 0xf) 2103 && (((long) (value + value1)) > 0)) 2104 { 2105 unsigned short code; 2106 2107 /* Get the opcode. */ 2108 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); 2109 2110 /* Note that we've changed the relocs, section contents, etc. */ 2111 elf_section_data (sec)->relocs = internal_relocs; 2112 elf_section_data (sec)->this_hdr.contents = contents; 2113 symtab_hdr->contents = (unsigned char *) isymbuf; 2114 2115 /* Fix the opcode. */ 2116 if (((code & 0x0f00) == 0x0400) || ((code & 0x0f00) == 0x0500)) 2117 { 2118 if ((code & 0x0f00) == 0x0400) /* For movd imm20. */ 2119 bfd_put_8 (abfd, 0x60, contents + irel->r_offset); 2120 else /* For addd imm20. */ 2121 bfd_put_8 (abfd, 0x54, contents + irel->r_offset); 2122 bfd_put_8 (abfd, (code & 0xf0) >> 4, contents + irel->r_offset + 1); 2123 } 2124 else 2125 { 2126 if ((code & 0xfff0) == 0x56b0) /* For cmpd imm16. */ 2127 bfd_put_8 (abfd, 0x56, contents + irel->r_offset); 2128 else if ((code & 0xfff0) == 0x54b0) /* For movd imm16. */ 2129 bfd_put_8 (abfd, 0x54, contents + irel->r_offset); 2130 else if ((code & 0xfff0) == 0x58b0) /* For movb imm16. */ 2131 bfd_put_8 (abfd, 0x58, contents + irel->r_offset); 2132 else if ((code & 0xfff0) == 0x5Ab0) /* For movw imm16. */ 2133 bfd_put_8 (abfd, 0x5A, contents + irel->r_offset); 2134 else if ((code & 0xfff0) == 0x60b0) /* For addd imm16. */ 2135 bfd_put_8 (abfd, 0x60, contents + irel->r_offset); 2136 else if ((code & 0xfff0) == 0x30b0) /* For addb imm16. */ 2137 bfd_put_8 (abfd, 0x30, contents + irel->r_offset); 2138 else if ((code & 0xfff0) == 0x2Cb0) /* For addub imm16. */ 2139 bfd_put_8 (abfd, 0x2C, contents + irel->r_offset); 2140 else if ((code & 0xfff0) == 0x32b0) /* For adduw imm16. */ 2141 bfd_put_8 (abfd, 0x32, contents + irel->r_offset); 2142 else if ((code & 0xfff0) == 0x38b0) /* For subb imm16. */ 2143 bfd_put_8 (abfd, 0x38, contents + irel->r_offset); 2144 else if ((code & 0xfff0) == 0x3Cb0) /* For subcb imm16. */ 2145 bfd_put_8 (abfd, 0x3C, contents + irel->r_offset); 2146 else if ((code & 0xfff0) == 0x3Fb0) /* For subcw imm16. */ 2147 bfd_put_8 (abfd, 0x3F, contents + irel->r_offset); 2148 else if ((code & 0xfff0) == 0x3Ab0) /* For subw imm16. */ 2149 bfd_put_8 (abfd, 0x3A, contents + irel->r_offset); 2150 else if ((code & 0xfff0) == 0x50b0) /* For cmpb imm16. */ 2151 bfd_put_8 (abfd, 0x50, contents + irel->r_offset); 2152 else if ((code & 0xfff0) == 0x52b0) /* For cmpw imm16. */ 2153 bfd_put_8 (abfd, 0x52, contents + irel->r_offset); 2154 else 2155 continue; 2156 2157 bfd_put_8 (abfd, (code & 0xf), contents + irel->r_offset + 1); 2158 } 2159 2160 /* Fix the relocation's type. */ 2161 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 2162 R_CR16_IMM4); 2163 2164 /* Delete two bytes of data. */ 2165 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, 2166 irel->r_offset + 2, 2)) 2167 goto error_return; 2168 2169 /* That will change things, so, we should relax again. 2170 Note that this is not required, and it may be slow. */ 2171 *again = TRUE; 2172 } 2173 } 2174 #endif 2175 } 2176 2177 if (isymbuf != NULL 2178 && symtab_hdr->contents != (unsigned char *) isymbuf) 2179 { 2180 if (! link_info->keep_memory) 2181 free (isymbuf); 2182 else 2183 /* Cache the symbols for elf_link_input_bfd. */ 2184 symtab_hdr->contents = (unsigned char *) isymbuf; 2185 } 2186 2187 if (contents != NULL 2188 && elf_section_data (sec)->this_hdr.contents != contents) 2189 { 2190 if (! link_info->keep_memory) 2191 free (contents); 2192 else 2193 /* Cache the section contents for elf_link_input_bfd. */ 2194 elf_section_data (sec)->this_hdr.contents = contents; 2195 2196 } 2197 2198 if (internal_relocs != NULL 2199 && elf_section_data (sec)->relocs != internal_relocs) 2200 free (internal_relocs); 2201 2202 return TRUE; 2203 2204 error_return: 2205 if (isymbuf != NULL 2206 && symtab_hdr->contents != (unsigned char *) isymbuf) 2207 free (isymbuf); 2208 if (contents != NULL 2209 && elf_section_data (sec)->this_hdr.contents != contents) 2210 free (contents); 2211 if (internal_relocs != NULL 2212 && elf_section_data (sec)->relocs != internal_relocs) 2213 free (internal_relocs); 2214 2215 return FALSE; 2216 } 2217 2218 static asection * 2219 elf32_cr16_gc_mark_hook (asection *sec, 2220 struct bfd_link_info *info, 2221 Elf_Internal_Rela *rel, 2222 struct elf_link_hash_entry *h, 2223 Elf_Internal_Sym *sym) 2224 { 2225 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 2226 } 2227 2228 /* Update the got entry reference counts for the section being removed. */ 2229 2230 static bfd_boolean 2231 elf32_cr16_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, 2232 struct bfd_link_info *info ATTRIBUTE_UNUSED, 2233 asection *sec ATTRIBUTE_UNUSED, 2234 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) 2235 { 2236 /* We don't support garbage collection of GOT and PLT relocs yet. */ 2237 return TRUE; 2238 } 2239 2240 /* Create dynamic sections when linking against a dynamic object. */ 2241 2242 static bfd_boolean 2243 _bfd_cr16_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 2244 { 2245 flagword flags; 2246 asection * s; 2247 const struct elf_backend_data * bed = get_elf_backend_data (abfd); 2248 int ptralign = 0; 2249 2250 switch (bed->s->arch_size) 2251 { 2252 case 16: 2253 ptralign = 1; 2254 break; 2255 2256 case 32: 2257 ptralign = 2; 2258 break; 2259 2260 default: 2261 bfd_set_error (bfd_error_bad_value); 2262 return FALSE; 2263 } 2264 2265 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and 2266 .rel[a].bss sections. */ 2267 2268 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 2269 | SEC_LINKER_CREATED); 2270 2271 s = bfd_make_section_anyway_with_flags (abfd, 2272 (bed->default_use_rela_p 2273 ? ".rela.plt" : ".rel.plt"), 2274 flags | SEC_READONLY); 2275 if (s == NULL 2276 || ! bfd_set_section_alignment (abfd, s, ptralign)) 2277 return FALSE; 2278 2279 if (! _bfd_cr16_elf_create_got_section (abfd, info)) 2280 return FALSE; 2281 2282 if (bed->want_dynbss) 2283 { 2284 /* The .dynbss section is a place to put symbols which are defined 2285 by dynamic objects, are referenced by regular objects, and are 2286 not functions. We must allocate space for them in the process 2287 image and use a R_*_COPY reloc to tell the dynamic linker to 2288 initialize them at run time. The linker script puts the .dynbss 2289 section into the .bss section of the final image. */ 2290 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", 2291 SEC_ALLOC | SEC_LINKER_CREATED); 2292 if (s == NULL) 2293 return FALSE; 2294 2295 /* The .rel[a].bss section holds copy relocs. This section is not 2296 normally needed. We need to create it here, though, so that the 2297 linker will map it to an output section. We can't just create it 2298 only if we need it, because we will not know whether we need it 2299 until we have seen all the input files, and the first time the 2300 main linker code calls BFD after examining all the input files 2301 (size_dynamic_sections) the input sections have already been 2302 mapped to the output sections. If the section turns out not to 2303 be needed, we can discard it later. We will never need this 2304 section when generating a shared object, since they do not use 2305 copy relocs. */ 2306 if (! info->executable) 2307 { 2308 s = bfd_make_section_anyway_with_flags (abfd, 2309 (bed->default_use_rela_p 2310 ? ".rela.bss" : ".rel.bss"), 2311 flags | SEC_READONLY); 2312 if (s == NULL 2313 || ! bfd_set_section_alignment (abfd, s, ptralign)) 2314 return FALSE; 2315 } 2316 } 2317 2318 return TRUE; 2319 } 2320 2321 /* Adjust a symbol defined by a dynamic object and referenced by a 2323 regular object. The current definition is in some section of the 2324 dynamic object, but we're not including those sections. We have to 2325 change the definition to something the rest of the link can 2326 understand. */ 2327 2328 static bfd_boolean 2329 _bfd_cr16_elf_adjust_dynamic_symbol (struct bfd_link_info * info, 2330 struct elf_link_hash_entry * h) 2331 { 2332 bfd * dynobj; 2333 asection * s; 2334 2335 dynobj = elf_hash_table (info)->dynobj; 2336 2337 /* Make sure we know what is going on here. */ 2338 BFD_ASSERT (dynobj != NULL 2339 && (h->needs_plt 2340 || h->u.weakdef != NULL 2341 || (h->def_dynamic 2342 && h->ref_regular 2343 && !h->def_regular))); 2344 2345 /* If this is a function, put it in the procedure linkage table. We 2346 will fill in the contents of the procedure linkage table later, 2347 when we know the address of the .got section. */ 2348 if (h->type == STT_FUNC 2349 || h->needs_plt) 2350 { 2351 if (! info->executable 2352 && !h->def_dynamic 2353 && !h->ref_dynamic) 2354 { 2355 /* This case can occur if we saw a PLT reloc in an input 2356 file, but the symbol was never referred to by a dynamic 2357 object. In such a case, we don't actually need to build 2358 a procedure linkage table, and we can just do a REL32 2359 reloc instead. */ 2360 BFD_ASSERT (h->needs_plt); 2361 return TRUE; 2362 } 2363 2364 /* Make sure this symbol is output as a dynamic symbol. */ 2365 if (h->dynindx == -1) 2366 { 2367 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2368 return FALSE; 2369 } 2370 2371 /* We also need to make an entry in the .got.plt section, which 2372 will be placed in the .got section by the linker script. */ 2373 2374 s = bfd_get_linker_section (dynobj, ".got.plt"); 2375 BFD_ASSERT (s != NULL); 2376 s->size += 4; 2377 2378 /* We also need to make an entry in the .rela.plt section. */ 2379 2380 s = bfd_get_linker_section (dynobj, ".rela.plt"); 2381 BFD_ASSERT (s != NULL); 2382 s->size += sizeof (Elf32_External_Rela); 2383 2384 return TRUE; 2385 } 2386 2387 /* If this is a weak symbol, and there is a real definition, the 2388 processor independent code will have arranged for us to see the 2389 real definition first, and we can just use the same value. */ 2390 if (h->u.weakdef != NULL) 2391 { 2392 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 2393 || h->u.weakdef->root.type == bfd_link_hash_defweak); 2394 h->root.u.def.section = h->u.weakdef->root.u.def.section; 2395 h->root.u.def.value = h->u.weakdef->root.u.def.value; 2396 return TRUE; 2397 } 2398 2399 /* This is a reference to a symbol defined by a dynamic object which 2400 is not a function. */ 2401 2402 /* If we are creating a shared library, we must presume that the 2403 only references to the symbol are via the global offset table. 2404 For such cases we need not do anything here; the relocations will 2405 be handled correctly by relocate_section. */ 2406 if (info->executable) 2407 return TRUE; 2408 2409 /* If there are no references to this symbol that do not use the 2410 GOT, we don't need to generate a copy reloc. */ 2411 if (!h->non_got_ref) 2412 return TRUE; 2413 2414 /* We must allocate the symbol in our .dynbss section, which will 2415 become part of the .bss section of the executable. There will be 2416 an entry for this symbol in the .dynsym section. The dynamic 2417 object will contain position independent code, so all references 2418 from the dynamic object to this symbol will go through the global 2419 offset table. The dynamic linker will use the .dynsym entry to 2420 determine the address it must put in the global offset table, so 2421 both the dynamic object and the regular object will refer to the 2422 same memory location for the variable. */ 2423 2424 s = bfd_get_linker_section (dynobj, ".dynbss"); 2425 BFD_ASSERT (s != NULL); 2426 2427 /* We must generate a R_CR16_COPY reloc to tell the dynamic linker to 2428 copy the initial value out of the dynamic object and into the 2429 runtime process image. We need to remember the offset into the 2430 .rela.bss section we are going to use. */ 2431 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 2432 { 2433 asection * srel; 2434 2435 srel = bfd_get_linker_section (dynobj, ".rela.bss"); 2436 BFD_ASSERT (srel != NULL); 2437 srel->size += sizeof (Elf32_External_Rela); 2438 h->needs_copy = 1; 2439 } 2440 2441 return _bfd_elf_adjust_dynamic_copy (h, s); 2442 } 2443 2444 /* Set the sizes of the dynamic sections. */ 2445 2446 static bfd_boolean 2447 _bfd_cr16_elf_size_dynamic_sections (bfd * output_bfd, 2448 struct bfd_link_info * info) 2449 { 2450 bfd * dynobj; 2451 asection * s; 2452 bfd_boolean plt; 2453 bfd_boolean relocs; 2454 bfd_boolean reltext; 2455 2456 dynobj = elf_hash_table (info)->dynobj; 2457 BFD_ASSERT (dynobj != NULL); 2458 2459 if (elf_hash_table (info)->dynamic_sections_created) 2460 { 2461 /* Set the contents of the .interp section to the interpreter. */ 2462 if (info->executable) 2463 { 2464 #if 0 2465 s = bfd_get_linker_section (dynobj, ".interp"); 2466 BFD_ASSERT (s != NULL); 2467 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 2468 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 2469 #endif 2470 } 2471 } 2472 else 2473 { 2474 /* We may have created entries in the .rela.got section. 2475 However, if we are not creating the dynamic sections, we will 2476 not actually use these entries. Reset the size of .rela.got, 2477 which will cause it to get stripped from the output file 2478 below. */ 2479 s = bfd_get_linker_section (dynobj, ".rela.got"); 2480 if (s != NULL) 2481 s->size = 0; 2482 } 2483 2484 /* The check_relocs and adjust_dynamic_symbol entry points have 2485 determined the sizes of the various dynamic sections. Allocate 2486 memory for them. */ 2487 plt = FALSE; 2488 relocs = FALSE; 2489 reltext = FALSE; 2490 for (s = dynobj->sections; s != NULL; s = s->next) 2491 { 2492 const char * name; 2493 2494 if ((s->flags & SEC_LINKER_CREATED) == 0) 2495 continue; 2496 2497 /* It's OK to base decisions on the section name, because none 2498 of the dynobj section names depend upon the input files. */ 2499 name = bfd_get_section_name (dynobj, s); 2500 2501 if (strcmp (name, ".plt") == 0) 2502 { 2503 /* Remember whether there is a PLT. */ 2504 plt = s->size != 0; 2505 } 2506 else if (CONST_STRNEQ (name, ".rela")) 2507 { 2508 if (s->size != 0) 2509 { 2510 asection * target; 2511 2512 /* Remember whether there are any reloc sections other 2513 than .rela.plt. */ 2514 if (strcmp (name, ".rela.plt") != 0) 2515 { 2516 const char * outname; 2517 2518 relocs = TRUE; 2519 2520 /* If this relocation section applies to a read only 2521 section, then we probably need a DT_TEXTREL 2522 entry. The entries in the .rela.plt section 2523 really apply to the .got section, which we 2524 created ourselves and so know is not readonly. */ 2525 outname = bfd_get_section_name (output_bfd, 2526 s->output_section); 2527 target = bfd_get_section_by_name (output_bfd, outname + 5); 2528 if (target != NULL 2529 && (target->flags & SEC_READONLY) != 0 2530 && (target->flags & SEC_ALLOC) != 0) 2531 reltext = TRUE; 2532 } 2533 2534 /* We use the reloc_count field as a counter if we need 2535 to copy relocs into the output file. */ 2536 s->reloc_count = 0; 2537 } 2538 } 2539 else if (! CONST_STRNEQ (name, ".got") 2540 && strcmp (name, ".dynbss") != 0) 2541 /* It's not one of our sections, so don't allocate space. */ 2542 continue; 2543 2544 if (s->size == 0) 2545 { 2546 /* If we don't need this section, strip it from the 2547 output file. This is mostly to handle .rela.bss and 2548 .rela.plt. We must create both sections in 2549 create_dynamic_sections, because they must be created 2550 before the linker maps input sections to output 2551 sections. The linker does that before 2552 adjust_dynamic_symbol is called, and it is that 2553 function which decides whether anything needs to go 2554 into these sections. */ 2555 s->flags |= SEC_EXCLUDE; 2556 continue; 2557 } 2558 2559 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2560 continue; 2561 2562 /* Allocate memory for the section contents. We use bfd_zalloc 2563 here in case unused entries are not reclaimed before the 2564 section's contents are written out. This should not happen, 2565 but this way if it does, we get a R_CR16_NONE reloc 2566 instead of garbage. */ 2567 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 2568 if (s->contents == NULL) 2569 return FALSE; 2570 } 2571 2572 if (elf_hash_table (info)->dynamic_sections_created) 2573 { 2574 /* Add some entries to the .dynamic section. We fill in the 2575 values later, in _bfd_cr16_elf_finish_dynamic_sections, 2576 but we must add the entries now so that we get the correct 2577 size for the .dynamic section. The DT_DEBUG entry is filled 2578 in by the dynamic linker and used by the debugger. */ 2579 if (! info->executable) 2580 { 2581 if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0)) 2582 return FALSE; 2583 } 2584 2585 if (plt) 2586 { 2587 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0) 2588 || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0) 2589 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA) 2590 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0)) 2591 return FALSE; 2592 } 2593 2594 if (relocs) 2595 { 2596 if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0) 2597 || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0) 2598 || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT, 2599 sizeof (Elf32_External_Rela))) 2600 return FALSE; 2601 } 2602 2603 if (reltext) 2604 { 2605 if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0)) 2606 return FALSE; 2607 } 2608 } 2609 2610 return TRUE; 2611 } 2612 2613 /* Finish up dynamic symbol handling. We set the contents of various 2614 dynamic sections here. */ 2615 2616 static bfd_boolean 2617 _bfd_cr16_elf_finish_dynamic_symbol (bfd * output_bfd, 2618 struct bfd_link_info * info, 2619 struct elf_link_hash_entry * h, 2620 Elf_Internal_Sym * sym) 2621 { 2622 bfd * dynobj; 2623 2624 dynobj = elf_hash_table (info)->dynobj; 2625 2626 if (h->got.offset != (bfd_vma) -1) 2627 { 2628 asection * sgot; 2629 asection * srel; 2630 Elf_Internal_Rela rel; 2631 2632 /* This symbol has an entry in the global offset table. Set it up. */ 2633 2634 sgot = bfd_get_linker_section (dynobj, ".got"); 2635 srel = bfd_get_linker_section (dynobj, ".rela.got"); 2636 BFD_ASSERT (sgot != NULL && srel != NULL); 2637 2638 rel.r_offset = (sgot->output_section->vma 2639 + sgot->output_offset 2640 + (h->got.offset & ~1)); 2641 2642 /* If this is a -Bsymbolic link, and the symbol is defined 2643 locally, we just want to emit a RELATIVE reloc. Likewise if 2644 the symbol was forced to be local because of a version file. 2645 The entry in the global offset table will already have been 2646 initialized in the relocate_section function. */ 2647 if (info->executable 2648 && (info->symbolic || h->dynindx == -1) 2649 && h->def_regular) 2650 { 2651 rel.r_info = ELF32_R_INFO (0, R_CR16_GOT_REGREL20); 2652 rel.r_addend = (h->root.u.def.value 2653 + h->root.u.def.section->output_section->vma 2654 + h->root.u.def.section->output_offset); 2655 } 2656 else 2657 { 2658 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); 2659 rel.r_info = ELF32_R_INFO (h->dynindx, R_CR16_GOT_REGREL20); 2660 rel.r_addend = 0; 2661 } 2662 2663 bfd_elf32_swap_reloca_out (output_bfd, &rel, 2664 (bfd_byte *) ((Elf32_External_Rela *) srel->contents 2665 + srel->reloc_count)); 2666 ++ srel->reloc_count; 2667 } 2668 2669 if (h->needs_copy) 2670 { 2671 asection * s; 2672 Elf_Internal_Rela rel; 2673 2674 /* This symbol needs a copy reloc. Set it up. */ 2675 BFD_ASSERT (h->dynindx != -1 2676 && (h->root.type == bfd_link_hash_defined 2677 || h->root.type == bfd_link_hash_defweak)); 2678 2679 s = bfd_get_linker_section (dynobj, ".rela.bss"); 2680 BFD_ASSERT (s != NULL); 2681 2682 rel.r_offset = (h->root.u.def.value 2683 + h->root.u.def.section->output_section->vma 2684 + h->root.u.def.section->output_offset); 2685 rel.r_info = ELF32_R_INFO (h->dynindx, R_CR16_GOT_REGREL20); 2686 rel.r_addend = 0; 2687 bfd_elf32_swap_reloca_out (output_bfd, &rel, 2688 (bfd_byte *) ((Elf32_External_Rela *) s->contents 2689 + s->reloc_count)); 2690 ++ s->reloc_count; 2691 } 2692 2693 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ 2694 if (h == elf_hash_table (info)->hdynamic 2695 || h == elf_hash_table (info)->hgot) 2696 sym->st_shndx = SHN_ABS; 2697 2698 return TRUE; 2699 } 2700 2701 /* Finish up the dynamic sections. */ 2702 2703 static bfd_boolean 2704 _bfd_cr16_elf_finish_dynamic_sections (bfd * output_bfd, 2705 struct bfd_link_info * info) 2706 { 2707 bfd * dynobj; 2708 asection * sgot; 2709 asection * sdyn; 2710 2711 dynobj = elf_hash_table (info)->dynobj; 2712 2713 sgot = bfd_get_linker_section (dynobj, ".got.plt"); 2714 BFD_ASSERT (sgot != NULL); 2715 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 2716 2717 if (elf_hash_table (info)->dynamic_sections_created) 2718 { 2719 Elf32_External_Dyn * dyncon; 2720 Elf32_External_Dyn * dynconend; 2721 2722 BFD_ASSERT (sdyn != NULL); 2723 2724 dyncon = (Elf32_External_Dyn *) sdyn->contents; 2725 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 2726 2727 for (; dyncon < dynconend; dyncon++) 2728 { 2729 Elf_Internal_Dyn dyn; 2730 const char * name; 2731 asection * s; 2732 2733 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 2734 2735 switch (dyn.d_tag) 2736 { 2737 default: 2738 break; 2739 2740 case DT_PLTGOT: 2741 name = ".got"; 2742 goto get_vma; 2743 2744 case DT_JMPREL: 2745 name = ".rela.plt"; 2746 get_vma: 2747 s = bfd_get_section_by_name (output_bfd, name); 2748 BFD_ASSERT (s != NULL); 2749 dyn.d_un.d_ptr = s->vma; 2750 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2751 break; 2752 2753 case DT_PLTRELSZ: 2754 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 2755 BFD_ASSERT (s != NULL); 2756 dyn.d_un.d_val = s->size; 2757 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2758 break; 2759 2760 case DT_RELASZ: 2761 /* My reading of the SVR4 ABI indicates that the 2762 procedure linkage table relocs (DT_JMPREL) should be 2763 included in the overall relocs (DT_RELA). This is 2764 what Solaris does. However, UnixWare can not handle 2765 that case. Therefore, we override the DT_RELASZ entry 2766 here to make it not include the JMPREL relocs. Since 2767 the linker script arranges for .rela.plt to follow all 2768 other relocation sections, we don't have to worry 2769 about changing the DT_RELA entry. */ 2770 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 2771 if (s != NULL) 2772 dyn.d_un.d_val -= s->size; 2773 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2774 break; 2775 } 2776 } 2777 2778 } 2779 2780 /* Fill in the first three entries in the global offset table. */ 2781 if (sgot->size > 0) 2782 { 2783 if (sdyn == NULL) 2784 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 2785 else 2786 bfd_put_32 (output_bfd, 2787 sdyn->output_section->vma + sdyn->output_offset, 2788 sgot->contents); 2789 } 2790 2791 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 2792 2793 return TRUE; 2794 } 2795 2796 /* Given a .data.rel section and a .emreloc in-memory section, store 2797 relocation information into the .emreloc section which can be 2798 used at runtime to relocate the section. This is called by the 2799 linker when the --embedded-relocs switch is used. This is called 2800 after the add_symbols entry point has been called for all the 2801 objects, and before the final_link entry point is called. */ 2802 2803 bfd_boolean 2804 bfd_cr16_elf32_create_embedded_relocs (bfd *abfd, 2805 struct bfd_link_info *info, 2806 asection *datasec, 2807 asection *relsec, 2808 char **errmsg) 2809 { 2810 Elf_Internal_Shdr *symtab_hdr; 2811 Elf_Internal_Sym *isymbuf = NULL; 2812 Elf_Internal_Rela *internal_relocs = NULL; 2813 Elf_Internal_Rela *irel, *irelend; 2814 bfd_byte *p; 2815 bfd_size_type amt; 2816 2817 BFD_ASSERT (! info->relocatable); 2818 2819 *errmsg = NULL; 2820 2821 if (datasec->reloc_count == 0) 2822 return TRUE; 2823 2824 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 2825 2826 /* Get a copy of the native relocations. */ 2827 internal_relocs = (_bfd_elf_link_read_relocs 2828 (abfd, datasec, NULL, NULL, info->keep_memory)); 2829 if (internal_relocs == NULL) 2830 goto error_return; 2831 2832 amt = (bfd_size_type) datasec->reloc_count * 8; 2833 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt); 2834 if (relsec->contents == NULL) 2835 goto error_return; 2836 2837 p = relsec->contents; 2838 2839 irelend = internal_relocs + datasec->reloc_count; 2840 for (irel = internal_relocs; irel < irelend; irel++, p += 8) 2841 { 2842 asection *targetsec; 2843 2844 /* We are going to write a four byte longword into the runtime 2845 reloc section. The longword will be the address in the data 2846 section which must be relocated. It is followed by the name 2847 of the target section NUL-padded or truncated to 8 2848 characters. */ 2849 2850 /* We can only relocate absolute longword relocs at run time. */ 2851 if (!((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32a) 2852 || (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32))) 2853 { 2854 *errmsg = _("unsupported reloc type"); 2855 bfd_set_error (bfd_error_bad_value); 2856 goto error_return; 2857 } 2858 2859 /* Get the target section referred to by the reloc. */ 2860 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 2861 { 2862 /* A local symbol. */ 2863 Elf_Internal_Sym *isym; 2864 2865 /* Read this BFD's local symbols if we haven't done so already. */ 2866 if (isymbuf == NULL) 2867 { 2868 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 2869 if (isymbuf == NULL) 2870 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 2871 symtab_hdr->sh_info, 0, 2872 NULL, NULL, NULL); 2873 if (isymbuf == NULL) 2874 goto error_return; 2875 } 2876 2877 isym = isymbuf + ELF32_R_SYM (irel->r_info); 2878 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx); 2879 } 2880 else 2881 { 2882 unsigned long indx; 2883 struct elf_link_hash_entry *h; 2884 2885 /* An external symbol. */ 2886 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 2887 h = elf_sym_hashes (abfd)[indx]; 2888 BFD_ASSERT (h != NULL); 2889 if (h->root.type == bfd_link_hash_defined 2890 || h->root.type == bfd_link_hash_defweak) 2891 targetsec = h->root.u.def.section; 2892 else 2893 targetsec = NULL; 2894 } 2895 2896 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p); 2897 memset (p + 4, 0, 4); 2898 if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32a) 2899 && (targetsec != NULL) ) 2900 strncpy ((char *) p + 4, targetsec->output_section->name, 4); 2901 } 2902 2903 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) 2904 free (isymbuf); 2905 if (internal_relocs != NULL 2906 && elf_section_data (datasec)->relocs != internal_relocs) 2907 free (internal_relocs); 2908 return TRUE; 2909 2910 error_return: 2911 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) 2912 free (isymbuf); 2913 if (internal_relocs != NULL 2914 && elf_section_data (datasec)->relocs != internal_relocs) 2915 free (internal_relocs); 2916 return FALSE; 2917 } 2918 2919 2920 /* Classify relocation types, such that combreloc can sort them 2921 properly. */ 2922 2923 static enum elf_reloc_type_class 2924 _bfd_cr16_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 2925 const asection *rel_sec ATTRIBUTE_UNUSED, 2926 const Elf_Internal_Rela *rela) 2927 { 2928 switch ((int) ELF32_R_TYPE (rela->r_info)) 2929 { 2930 case R_CR16_GOT_REGREL20: 2931 case R_CR16_GOTC_REGREL20: 2932 return reloc_class_relative; 2933 default: 2934 return reloc_class_normal; 2935 } 2936 } 2937 2938 /* Definitions for setting CR16 target vector. */ 2939 #define TARGET_LITTLE_SYM cr16_elf32_vec 2940 #define TARGET_LITTLE_NAME "elf32-cr16" 2941 #define ELF_ARCH bfd_arch_cr16 2942 #define ELF_MACHINE_CODE EM_CR16 2943 #define ELF_MACHINE_ALT1 EM_CR16_OLD 2944 #define ELF_MAXPAGESIZE 0x1 2945 #define elf_symbol_leading_char '_' 2946 2947 #define bfd_elf32_bfd_reloc_type_lookup elf_cr16_reloc_type_lookup 2948 #define bfd_elf32_bfd_reloc_name_lookup elf_cr16_reloc_name_lookup 2949 #define elf_info_to_howto elf_cr16_info_to_howto 2950 #define elf_info_to_howto_rel 0 2951 #define elf_backend_relocate_section elf32_cr16_relocate_section 2952 #define bfd_elf32_bfd_relax_section elf32_cr16_relax_section 2953 #define bfd_elf32_bfd_get_relocated_section_contents \ 2954 elf32_cr16_get_relocated_section_contents 2955 #define elf_backend_gc_mark_hook elf32_cr16_gc_mark_hook 2956 #define elf_backend_gc_sweep_hook elf32_cr16_gc_sweep_hook 2957 #define elf_backend_can_gc_sections 1 2958 #define elf_backend_rela_normal 1 2959 #define elf_backend_check_relocs cr16_elf_check_relocs 2960 /* So we can set bits in e_flags. */ 2961 #define elf_backend_final_write_processing \ 2962 _bfd_cr16_elf_final_write_processing 2963 #define elf_backend_object_p _bfd_cr16_elf_object_p 2964 2965 #define bfd_elf32_bfd_merge_private_bfd_data \ 2966 _bfd_cr16_elf_merge_private_bfd_data 2967 2968 2969 #define bfd_elf32_bfd_link_hash_table_create \ 2970 elf32_cr16_link_hash_table_create 2971 2972 #define elf_backend_create_dynamic_sections \ 2973 _bfd_cr16_elf_create_dynamic_sections 2974 #define elf_backend_adjust_dynamic_symbol \ 2975 _bfd_cr16_elf_adjust_dynamic_symbol 2976 #define elf_backend_size_dynamic_sections \ 2977 _bfd_cr16_elf_size_dynamic_sections 2978 #define elf_backend_omit_section_dynsym \ 2979 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) 2980 #define elf_backend_finish_dynamic_symbol \ 2981 _bfd_cr16_elf_finish_dynamic_symbol 2982 #define elf_backend_finish_dynamic_sections \ 2983 _bfd_cr16_elf_finish_dynamic_sections 2984 2985 #define elf_backend_reloc_type_class _bfd_cr16_elf_reloc_type_class 2986 2987 2988 #define elf_backend_want_got_plt 1 2989 #define elf_backend_plt_readonly 1 2990 #define elf_backend_want_plt_sym 0 2991 #define elf_backend_got_header_size 12 2992 2993 #include "elf32-target.h" 2994