1 /* Matsushita 10300 specific support for 32-bit ELF 2 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 3 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 20 MA 02110-1301, USA. */ 21 22 #include "sysdep.h" 23 #include "bfd.h" 24 #include "libbfd.h" 25 #include "elf-bfd.h" 26 #include "elf/mn10300.h" 27 #include "libiberty.h" 28 29 /* The mn10300 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_mn10300_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 /* When set, convert all "call" instructions to this target into "calls" 62 instructions. */ 63 #define MN10300_CONVERT_CALL_TO_CALLS 0x1 64 65 /* Used to mark functions which have had redundant parts of their 66 prologue deleted. */ 67 #define MN10300_DELETED_PROLOGUE_BYTES 0x2 68 unsigned char flags; 69 70 /* Calculated value. */ 71 bfd_vma value; 72 73 #define GOT_UNKNOWN 0 74 #define GOT_NORMAL 1 75 #define GOT_TLS_GD 2 76 #define GOT_TLS_LD 3 77 #define GOT_TLS_IE 4 78 /* Used to distinguish GOT entries for TLS types from normal GOT entries. */ 79 unsigned char tls_type; 80 }; 81 82 /* We derive a hash table from the main elf linker hash table so 83 we can store state variables and a secondary hash table without 84 resorting to global variables. */ 85 struct elf32_mn10300_link_hash_table 86 { 87 /* The main hash table. */ 88 struct elf_link_hash_table root; 89 90 /* A hash table for static functions. We could derive a new hash table 91 instead of using the full elf32_mn10300_link_hash_table if we wanted 92 to save some memory. */ 93 struct elf32_mn10300_link_hash_table *static_hash_table; 94 95 /* Random linker state flags. */ 96 #define MN10300_HASH_ENTRIES_INITIALIZED 0x1 97 char flags; 98 struct 99 { 100 bfd_signed_vma refcount; 101 bfd_vma offset; 102 char got_allocated; 103 char rel_emitted; 104 } tls_ldm_got; 105 }; 106 107 #define elf_mn10300_hash_entry(ent) ((struct elf32_mn10300_link_hash_entry *)(ent)) 108 109 struct elf_mn10300_obj_tdata 110 { 111 struct elf_obj_tdata root; 112 113 /* tls_type for each local got entry. */ 114 char * local_got_tls_type; 115 }; 116 117 #define elf_mn10300_tdata(abfd) \ 118 ((struct elf_mn10300_obj_tdata *) (abfd)->tdata.any) 119 120 #define elf_mn10300_local_got_tls_type(abfd) \ 121 (elf_mn10300_tdata (abfd)->local_got_tls_type) 122 123 #ifndef streq 124 #define streq(a, b) (strcmp ((a),(b)) == 0) 125 #endif 126 127 /* For MN10300 linker hash table. */ 128 129 /* Get the MN10300 ELF linker hash table from a link_info structure. */ 130 131 #define elf32_mn10300_hash_table(p) \ 132 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 133 == MN10300_ELF_DATA ? ((struct elf32_mn10300_link_hash_table *) ((p)->hash)) : NULL) 134 135 #define elf32_mn10300_link_hash_traverse(table, func, info) \ 136 (elf_link_hash_traverse \ 137 (&(table)->root, \ 138 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ 139 (info))) 140 141 static reloc_howto_type elf_mn10300_howto_table[] = 142 { 143 /* Dummy relocation. Does nothing. */ 144 HOWTO (R_MN10300_NONE, 145 0, 146 2, 147 16, 148 FALSE, 149 0, 150 complain_overflow_bitfield, 151 bfd_elf_generic_reloc, 152 "R_MN10300_NONE", 153 FALSE, 154 0, 155 0, 156 FALSE), 157 /* Standard 32 bit reloc. */ 158 HOWTO (R_MN10300_32, 159 0, 160 2, 161 32, 162 FALSE, 163 0, 164 complain_overflow_bitfield, 165 bfd_elf_generic_reloc, 166 "R_MN10300_32", 167 FALSE, 168 0xffffffff, 169 0xffffffff, 170 FALSE), 171 /* Standard 16 bit reloc. */ 172 HOWTO (R_MN10300_16, 173 0, 174 1, 175 16, 176 FALSE, 177 0, 178 complain_overflow_bitfield, 179 bfd_elf_generic_reloc, 180 "R_MN10300_16", 181 FALSE, 182 0xffff, 183 0xffff, 184 FALSE), 185 /* Standard 8 bit reloc. */ 186 HOWTO (R_MN10300_8, 187 0, 188 0, 189 8, 190 FALSE, 191 0, 192 complain_overflow_bitfield, 193 bfd_elf_generic_reloc, 194 "R_MN10300_8", 195 FALSE, 196 0xff, 197 0xff, 198 FALSE), 199 /* Standard 32bit pc-relative reloc. */ 200 HOWTO (R_MN10300_PCREL32, 201 0, 202 2, 203 32, 204 TRUE, 205 0, 206 complain_overflow_bitfield, 207 bfd_elf_generic_reloc, 208 "R_MN10300_PCREL32", 209 FALSE, 210 0xffffffff, 211 0xffffffff, 212 TRUE), 213 /* Standard 16bit pc-relative reloc. */ 214 HOWTO (R_MN10300_PCREL16, 215 0, 216 1, 217 16, 218 TRUE, 219 0, 220 complain_overflow_bitfield, 221 bfd_elf_generic_reloc, 222 "R_MN10300_PCREL16", 223 FALSE, 224 0xffff, 225 0xffff, 226 TRUE), 227 /* Standard 8 pc-relative reloc. */ 228 HOWTO (R_MN10300_PCREL8, 229 0, 230 0, 231 8, 232 TRUE, 233 0, 234 complain_overflow_bitfield, 235 bfd_elf_generic_reloc, 236 "R_MN10300_PCREL8", 237 FALSE, 238 0xff, 239 0xff, 240 TRUE), 241 242 /* GNU extension to record C++ vtable hierarchy. */ 243 HOWTO (R_MN10300_GNU_VTINHERIT, /* type */ 244 0, /* rightshift */ 245 0, /* size (0 = byte, 1 = short, 2 = long) */ 246 0, /* bitsize */ 247 FALSE, /* pc_relative */ 248 0, /* bitpos */ 249 complain_overflow_dont, /* complain_on_overflow */ 250 NULL, /* special_function */ 251 "R_MN10300_GNU_VTINHERIT", /* name */ 252 FALSE, /* partial_inplace */ 253 0, /* src_mask */ 254 0, /* dst_mask */ 255 FALSE), /* pcrel_offset */ 256 257 /* GNU extension to record C++ vtable member usage */ 258 HOWTO (R_MN10300_GNU_VTENTRY, /* type */ 259 0, /* rightshift */ 260 0, /* size (0 = byte, 1 = short, 2 = long) */ 261 0, /* bitsize */ 262 FALSE, /* pc_relative */ 263 0, /* bitpos */ 264 complain_overflow_dont, /* complain_on_overflow */ 265 NULL, /* special_function */ 266 "R_MN10300_GNU_VTENTRY", /* name */ 267 FALSE, /* partial_inplace */ 268 0, /* src_mask */ 269 0, /* dst_mask */ 270 FALSE), /* pcrel_offset */ 271 272 /* Standard 24 bit reloc. */ 273 HOWTO (R_MN10300_24, 274 0, 275 2, 276 24, 277 FALSE, 278 0, 279 complain_overflow_bitfield, 280 bfd_elf_generic_reloc, 281 "R_MN10300_24", 282 FALSE, 283 0xffffff, 284 0xffffff, 285 FALSE), 286 HOWTO (R_MN10300_GOTPC32, /* type */ 287 0, /* rightshift */ 288 2, /* size (0 = byte, 1 = short, 2 = long) */ 289 32, /* bitsize */ 290 TRUE, /* pc_relative */ 291 0, /* bitpos */ 292 complain_overflow_bitfield, /* complain_on_overflow */ 293 bfd_elf_generic_reloc, /* */ 294 "R_MN10300_GOTPC32", /* name */ 295 FALSE, /* partial_inplace */ 296 0xffffffff, /* src_mask */ 297 0xffffffff, /* dst_mask */ 298 TRUE), /* pcrel_offset */ 299 300 HOWTO (R_MN10300_GOTPC16, /* type */ 301 0, /* rightshift */ 302 1, /* size (0 = byte, 1 = short, 2 = long) */ 303 16, /* bitsize */ 304 TRUE, /* pc_relative */ 305 0, /* bitpos */ 306 complain_overflow_bitfield, /* complain_on_overflow */ 307 bfd_elf_generic_reloc, /* */ 308 "R_MN10300_GOTPC16", /* name */ 309 FALSE, /* partial_inplace */ 310 0xffff, /* src_mask */ 311 0xffff, /* dst_mask */ 312 TRUE), /* pcrel_offset */ 313 314 HOWTO (R_MN10300_GOTOFF32, /* type */ 315 0, /* rightshift */ 316 2, /* size (0 = byte, 1 = short, 2 = long) */ 317 32, /* bitsize */ 318 FALSE, /* pc_relative */ 319 0, /* bitpos */ 320 complain_overflow_bitfield, /* complain_on_overflow */ 321 bfd_elf_generic_reloc, /* */ 322 "R_MN10300_GOTOFF32", /* name */ 323 FALSE, /* partial_inplace */ 324 0xffffffff, /* src_mask */ 325 0xffffffff, /* dst_mask */ 326 FALSE), /* pcrel_offset */ 327 328 HOWTO (R_MN10300_GOTOFF24, /* type */ 329 0, /* rightshift */ 330 2, /* size (0 = byte, 1 = short, 2 = long) */ 331 24, /* bitsize */ 332 FALSE, /* pc_relative */ 333 0, /* bitpos */ 334 complain_overflow_bitfield, /* complain_on_overflow */ 335 bfd_elf_generic_reloc, /* */ 336 "R_MN10300_GOTOFF24", /* name */ 337 FALSE, /* partial_inplace */ 338 0xffffff, /* src_mask */ 339 0xffffff, /* dst_mask */ 340 FALSE), /* pcrel_offset */ 341 342 HOWTO (R_MN10300_GOTOFF16, /* type */ 343 0, /* rightshift */ 344 1, /* size (0 = byte, 1 = short, 2 = long) */ 345 16, /* bitsize */ 346 FALSE, /* pc_relative */ 347 0, /* bitpos */ 348 complain_overflow_bitfield, /* complain_on_overflow */ 349 bfd_elf_generic_reloc, /* */ 350 "R_MN10300_GOTOFF16", /* name */ 351 FALSE, /* partial_inplace */ 352 0xffff, /* src_mask */ 353 0xffff, /* dst_mask */ 354 FALSE), /* pcrel_offset */ 355 356 HOWTO (R_MN10300_PLT32, /* type */ 357 0, /* rightshift */ 358 2, /* size (0 = byte, 1 = short, 2 = long) */ 359 32, /* bitsize */ 360 TRUE, /* pc_relative */ 361 0, /* bitpos */ 362 complain_overflow_bitfield, /* complain_on_overflow */ 363 bfd_elf_generic_reloc, /* */ 364 "R_MN10300_PLT32", /* name */ 365 FALSE, /* partial_inplace */ 366 0xffffffff, /* src_mask */ 367 0xffffffff, /* dst_mask */ 368 TRUE), /* pcrel_offset */ 369 370 HOWTO (R_MN10300_PLT16, /* type */ 371 0, /* rightshift */ 372 1, /* size (0 = byte, 1 = short, 2 = long) */ 373 16, /* bitsize */ 374 TRUE, /* pc_relative */ 375 0, /* bitpos */ 376 complain_overflow_bitfield, /* complain_on_overflow */ 377 bfd_elf_generic_reloc, /* */ 378 "R_MN10300_PLT16", /* name */ 379 FALSE, /* partial_inplace */ 380 0xffff, /* src_mask */ 381 0xffff, /* dst_mask */ 382 TRUE), /* pcrel_offset */ 383 384 HOWTO (R_MN10300_GOT32, /* type */ 385 0, /* rightshift */ 386 2, /* size (0 = byte, 1 = short, 2 = long) */ 387 32, /* bitsize */ 388 FALSE, /* pc_relative */ 389 0, /* bitpos */ 390 complain_overflow_bitfield, /* complain_on_overflow */ 391 bfd_elf_generic_reloc, /* */ 392 "R_MN10300_GOT32", /* name */ 393 FALSE, /* partial_inplace */ 394 0xffffffff, /* src_mask */ 395 0xffffffff, /* dst_mask */ 396 FALSE), /* pcrel_offset */ 397 398 HOWTO (R_MN10300_GOT24, /* type */ 399 0, /* rightshift */ 400 2, /* size (0 = byte, 1 = short, 2 = long) */ 401 24, /* bitsize */ 402 FALSE, /* pc_relative */ 403 0, /* bitpos */ 404 complain_overflow_bitfield, /* complain_on_overflow */ 405 bfd_elf_generic_reloc, /* */ 406 "R_MN10300_GOT24", /* name */ 407 FALSE, /* partial_inplace */ 408 0xffffffff, /* src_mask */ 409 0xffffffff, /* dst_mask */ 410 FALSE), /* pcrel_offset */ 411 412 HOWTO (R_MN10300_GOT16, /* type */ 413 0, /* rightshift */ 414 1, /* size (0 = byte, 1 = short, 2 = long) */ 415 16, /* bitsize */ 416 FALSE, /* pc_relative */ 417 0, /* bitpos */ 418 complain_overflow_bitfield, /* complain_on_overflow */ 419 bfd_elf_generic_reloc, /* */ 420 "R_MN10300_GOT16", /* name */ 421 FALSE, /* partial_inplace */ 422 0xffffffff, /* src_mask */ 423 0xffffffff, /* dst_mask */ 424 FALSE), /* pcrel_offset */ 425 426 HOWTO (R_MN10300_COPY, /* type */ 427 0, /* rightshift */ 428 2, /* size (0 = byte, 1 = short, 2 = long) */ 429 32, /* bitsize */ 430 FALSE, /* pc_relative */ 431 0, /* bitpos */ 432 complain_overflow_bitfield, /* complain_on_overflow */ 433 bfd_elf_generic_reloc, /* */ 434 "R_MN10300_COPY", /* name */ 435 FALSE, /* partial_inplace */ 436 0xffffffff, /* src_mask */ 437 0xffffffff, /* dst_mask */ 438 FALSE), /* pcrel_offset */ 439 440 HOWTO (R_MN10300_GLOB_DAT, /* type */ 441 0, /* rightshift */ 442 2, /* size (0 = byte, 1 = short, 2 = long) */ 443 32, /* bitsize */ 444 FALSE, /* pc_relative */ 445 0, /* bitpos */ 446 complain_overflow_bitfield, /* complain_on_overflow */ 447 bfd_elf_generic_reloc, /* */ 448 "R_MN10300_GLOB_DAT", /* name */ 449 FALSE, /* partial_inplace */ 450 0xffffffff, /* src_mask */ 451 0xffffffff, /* dst_mask */ 452 FALSE), /* pcrel_offset */ 453 454 HOWTO (R_MN10300_JMP_SLOT, /* type */ 455 0, /* rightshift */ 456 2, /* size (0 = byte, 1 = short, 2 = long) */ 457 32, /* bitsize */ 458 FALSE, /* pc_relative */ 459 0, /* bitpos */ 460 complain_overflow_bitfield, /* complain_on_overflow */ 461 bfd_elf_generic_reloc, /* */ 462 "R_MN10300_JMP_SLOT", /* name */ 463 FALSE, /* partial_inplace */ 464 0xffffffff, /* src_mask */ 465 0xffffffff, /* dst_mask */ 466 FALSE), /* pcrel_offset */ 467 468 HOWTO (R_MN10300_RELATIVE, /* type */ 469 0, /* rightshift */ 470 2, /* size (0 = byte, 1 = short, 2 = long) */ 471 32, /* bitsize */ 472 FALSE, /* pc_relative */ 473 0, /* bitpos */ 474 complain_overflow_bitfield, /* complain_on_overflow */ 475 bfd_elf_generic_reloc, /* */ 476 "R_MN10300_RELATIVE", /* name */ 477 FALSE, /* partial_inplace */ 478 0xffffffff, /* src_mask */ 479 0xffffffff, /* dst_mask */ 480 FALSE), /* pcrel_offset */ 481 482 HOWTO (R_MN10300_TLS_GD, /* type */ 483 0, /* rightshift */ 484 2, /* size (0 = byte, 1 = short, 2 = long) */ 485 32, /* bitsize */ 486 FALSE, /* pc_relative */ 487 0, /* bitpos */ 488 complain_overflow_bitfield, /* complain_on_overflow */ 489 bfd_elf_generic_reloc, /* */ 490 "R_MN10300_TLS_GD", /* name */ 491 FALSE, /* partial_inplace */ 492 0xffffffff, /* src_mask */ 493 0xffffffff, /* dst_mask */ 494 FALSE), /* pcrel_offset */ 495 496 HOWTO (R_MN10300_TLS_LD, /* type */ 497 0, /* rightshift */ 498 2, /* size (0 = byte, 1 = short, 2 = long) */ 499 32, /* bitsize */ 500 FALSE, /* pc_relative */ 501 0, /* bitpos */ 502 complain_overflow_bitfield, /* complain_on_overflow */ 503 bfd_elf_generic_reloc, /* */ 504 "R_MN10300_TLS_LD", /* name */ 505 FALSE, /* partial_inplace */ 506 0xffffffff, /* src_mask */ 507 0xffffffff, /* dst_mask */ 508 FALSE), /* pcrel_offset */ 509 510 HOWTO (R_MN10300_TLS_LDO, /* type */ 511 0, /* rightshift */ 512 2, /* size (0 = byte, 1 = short, 2 = long) */ 513 32, /* bitsize */ 514 FALSE, /* pc_relative */ 515 0, /* bitpos */ 516 complain_overflow_bitfield, /* complain_on_overflow */ 517 bfd_elf_generic_reloc, /* */ 518 "R_MN10300_TLS_LDO", /* name */ 519 FALSE, /* partial_inplace */ 520 0xffffffff, /* src_mask */ 521 0xffffffff, /* dst_mask */ 522 FALSE), /* pcrel_offset */ 523 524 HOWTO (R_MN10300_TLS_GOTIE, /* type */ 525 0, /* rightshift */ 526 2, /* size (0 = byte, 1 = short, 2 = long) */ 527 32, /* bitsize */ 528 FALSE, /* pc_relative */ 529 0, /* bitpos */ 530 complain_overflow_bitfield, /* complain_on_overflow */ 531 bfd_elf_generic_reloc, /* */ 532 "R_MN10300_TLS_GOTIE", /* name */ 533 FALSE, /* partial_inplace */ 534 0xffffffff, /* src_mask */ 535 0xffffffff, /* dst_mask */ 536 FALSE), /* pcrel_offset */ 537 538 HOWTO (R_MN10300_TLS_IE, /* type */ 539 0, /* rightshift */ 540 2, /* size (0 = byte, 1 = short, 2 = long) */ 541 32, /* bitsize */ 542 FALSE, /* pc_relative */ 543 0, /* bitpos */ 544 complain_overflow_bitfield, /* complain_on_overflow */ 545 bfd_elf_generic_reloc, /* */ 546 "R_MN10300_TLS_IE", /* name */ 547 FALSE, /* partial_inplace */ 548 0xffffffff, /* src_mask */ 549 0xffffffff, /* dst_mask */ 550 FALSE), /* pcrel_offset */ 551 552 HOWTO (R_MN10300_TLS_LE, /* type */ 553 0, /* rightshift */ 554 2, /* size (0 = byte, 1 = short, 2 = long) */ 555 32, /* bitsize */ 556 FALSE, /* pc_relative */ 557 0, /* bitpos */ 558 complain_overflow_bitfield, /* complain_on_overflow */ 559 bfd_elf_generic_reloc, /* */ 560 "R_MN10300_TLS_LE", /* name */ 561 FALSE, /* partial_inplace */ 562 0xffffffff, /* src_mask */ 563 0xffffffff, /* dst_mask */ 564 FALSE), /* pcrel_offset */ 565 566 HOWTO (R_MN10300_TLS_DTPMOD, /* type */ 567 0, /* rightshift */ 568 2, /* size (0 = byte, 1 = short, 2 = long) */ 569 32, /* bitsize */ 570 FALSE, /* pc_relative */ 571 0, /* bitpos */ 572 complain_overflow_bitfield, /* complain_on_overflow */ 573 bfd_elf_generic_reloc, /* */ 574 "R_MN10300_TLS_DTPMOD", /* name */ 575 FALSE, /* partial_inplace */ 576 0xffffffff, /* src_mask */ 577 0xffffffff, /* dst_mask */ 578 FALSE), /* pcrel_offset */ 579 580 HOWTO (R_MN10300_TLS_DTPOFF, /* type */ 581 0, /* rightshift */ 582 2, /* size (0 = byte, 1 = short, 2 = long) */ 583 32, /* bitsize */ 584 FALSE, /* pc_relative */ 585 0, /* bitpos */ 586 complain_overflow_bitfield, /* complain_on_overflow */ 587 bfd_elf_generic_reloc, /* */ 588 "R_MN10300_TLS_DTPOFF", /* name */ 589 FALSE, /* partial_inplace */ 590 0xffffffff, /* src_mask */ 591 0xffffffff, /* dst_mask */ 592 FALSE), /* pcrel_offset */ 593 594 HOWTO (R_MN10300_TLS_TPOFF, /* type */ 595 0, /* rightshift */ 596 2, /* size (0 = byte, 1 = short, 2 = long) */ 597 32, /* bitsize */ 598 FALSE, /* pc_relative */ 599 0, /* bitpos */ 600 complain_overflow_bitfield, /* complain_on_overflow */ 601 bfd_elf_generic_reloc, /* */ 602 "R_MN10300_TLS_TPOFF", /* name */ 603 FALSE, /* partial_inplace */ 604 0xffffffff, /* src_mask */ 605 0xffffffff, /* dst_mask */ 606 FALSE), /* pcrel_offset */ 607 608 HOWTO (R_MN10300_SYM_DIFF, /* type */ 609 0, /* rightshift */ 610 2, /* size (0 = byte, 1 = short, 2 = long) */ 611 32, /* bitsize */ 612 FALSE, /* pc_relative */ 613 0, /* bitpos */ 614 complain_overflow_dont,/* complain_on_overflow */ 615 NULL, /* special handler. */ 616 "R_MN10300_SYM_DIFF", /* name */ 617 FALSE, /* partial_inplace */ 618 0xffffffff, /* src_mask */ 619 0xffffffff, /* dst_mask */ 620 FALSE), /* pcrel_offset */ 621 622 HOWTO (R_MN10300_ALIGN, /* type */ 623 0, /* rightshift */ 624 0, /* size (0 = byte, 1 = short, 2 = long) */ 625 32, /* bitsize */ 626 FALSE, /* pc_relative */ 627 0, /* bitpos */ 628 complain_overflow_dont,/* complain_on_overflow */ 629 NULL, /* special handler. */ 630 "R_MN10300_ALIGN", /* name */ 631 FALSE, /* partial_inplace */ 632 0, /* src_mask */ 633 0, /* dst_mask */ 634 FALSE) /* pcrel_offset */ 635 }; 636 637 struct mn10300_reloc_map 638 { 639 bfd_reloc_code_real_type bfd_reloc_val; 640 unsigned char elf_reloc_val; 641 }; 642 643 static const struct mn10300_reloc_map mn10300_reloc_map[] = 644 { 645 { BFD_RELOC_NONE, R_MN10300_NONE, }, 646 { BFD_RELOC_32, R_MN10300_32, }, 647 { BFD_RELOC_16, R_MN10300_16, }, 648 { BFD_RELOC_8, R_MN10300_8, }, 649 { BFD_RELOC_32_PCREL, R_MN10300_PCREL32, }, 650 { BFD_RELOC_16_PCREL, R_MN10300_PCREL16, }, 651 { BFD_RELOC_8_PCREL, R_MN10300_PCREL8, }, 652 { BFD_RELOC_24, R_MN10300_24, }, 653 { BFD_RELOC_VTABLE_INHERIT, R_MN10300_GNU_VTINHERIT }, 654 { BFD_RELOC_VTABLE_ENTRY, R_MN10300_GNU_VTENTRY }, 655 { BFD_RELOC_32_GOT_PCREL, R_MN10300_GOTPC32 }, 656 { BFD_RELOC_16_GOT_PCREL, R_MN10300_GOTPC16 }, 657 { BFD_RELOC_32_GOTOFF, R_MN10300_GOTOFF32 }, 658 { BFD_RELOC_MN10300_GOTOFF24, R_MN10300_GOTOFF24 }, 659 { BFD_RELOC_16_GOTOFF, R_MN10300_GOTOFF16 }, 660 { BFD_RELOC_32_PLT_PCREL, R_MN10300_PLT32 }, 661 { BFD_RELOC_16_PLT_PCREL, R_MN10300_PLT16 }, 662 { BFD_RELOC_MN10300_GOT32, R_MN10300_GOT32 }, 663 { BFD_RELOC_MN10300_GOT24, R_MN10300_GOT24 }, 664 { BFD_RELOC_MN10300_GOT16, R_MN10300_GOT16 }, 665 { BFD_RELOC_MN10300_COPY, R_MN10300_COPY }, 666 { BFD_RELOC_MN10300_GLOB_DAT, R_MN10300_GLOB_DAT }, 667 { BFD_RELOC_MN10300_JMP_SLOT, R_MN10300_JMP_SLOT }, 668 { BFD_RELOC_MN10300_RELATIVE, R_MN10300_RELATIVE }, 669 { BFD_RELOC_MN10300_TLS_GD, R_MN10300_TLS_GD }, 670 { BFD_RELOC_MN10300_TLS_LD, R_MN10300_TLS_LD }, 671 { BFD_RELOC_MN10300_TLS_LDO, R_MN10300_TLS_LDO }, 672 { BFD_RELOC_MN10300_TLS_GOTIE, R_MN10300_TLS_GOTIE }, 673 { BFD_RELOC_MN10300_TLS_IE, R_MN10300_TLS_IE }, 674 { BFD_RELOC_MN10300_TLS_LE, R_MN10300_TLS_LE }, 675 { BFD_RELOC_MN10300_TLS_DTPMOD, R_MN10300_TLS_DTPMOD }, 676 { BFD_RELOC_MN10300_TLS_DTPOFF, R_MN10300_TLS_DTPOFF }, 677 { BFD_RELOC_MN10300_TLS_TPOFF, R_MN10300_TLS_TPOFF }, 678 { BFD_RELOC_MN10300_SYM_DIFF, R_MN10300_SYM_DIFF }, 679 { BFD_RELOC_MN10300_ALIGN, R_MN10300_ALIGN } 680 }; 681 682 /* Create the GOT section. */ 683 684 static bfd_boolean 685 _bfd_mn10300_elf_create_got_section (bfd * abfd, 686 struct bfd_link_info * info) 687 { 688 flagword flags; 689 flagword pltflags; 690 asection * s; 691 struct elf_link_hash_entry * h; 692 const struct elf_backend_data * bed = get_elf_backend_data (abfd); 693 struct elf_link_hash_table *htab; 694 int ptralign; 695 696 /* This function may be called more than once. */ 697 htab = elf_hash_table (info); 698 if (htab->sgot != NULL) 699 return TRUE; 700 701 switch (bed->s->arch_size) 702 { 703 case 32: 704 ptralign = 2; 705 break; 706 707 case 64: 708 ptralign = 3; 709 break; 710 711 default: 712 bfd_set_error (bfd_error_bad_value); 713 return FALSE; 714 } 715 716 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 717 | SEC_LINKER_CREATED); 718 719 pltflags = flags; 720 pltflags |= SEC_CODE; 721 if (bed->plt_not_loaded) 722 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); 723 if (bed->plt_readonly) 724 pltflags |= SEC_READONLY; 725 726 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); 727 htab->splt = s; 728 if (s == NULL 729 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) 730 return FALSE; 731 732 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the 733 .plt section. */ 734 if (bed->want_plt_sym) 735 { 736 h = _bfd_elf_define_linkage_sym (abfd, info, s, 737 "_PROCEDURE_LINKAGE_TABLE_"); 738 htab->hplt = h; 739 if (h == NULL) 740 return FALSE; 741 } 742 743 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); 744 htab->sgot = s; 745 if (s == NULL 746 || ! bfd_set_section_alignment (abfd, s, ptralign)) 747 return FALSE; 748 749 if (bed->want_got_plt) 750 { 751 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); 752 htab->sgotplt = s; 753 if (s == NULL 754 || ! bfd_set_section_alignment (abfd, s, ptralign)) 755 return FALSE; 756 } 757 758 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got 759 (or .got.plt) section. We don't do this in the linker script 760 because we don't want to define the symbol if we are not creating 761 a global offset table. */ 762 h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_"); 763 htab->hgot = h; 764 if (h == NULL) 765 return FALSE; 766 767 /* The first bit of the global offset table is the header. */ 768 s->size += bed->got_header_size; 769 770 return TRUE; 771 } 772 773 static reloc_howto_type * 774 bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 775 bfd_reloc_code_real_type code) 776 { 777 unsigned int i; 778 779 for (i = ARRAY_SIZE (mn10300_reloc_map); i--;) 780 if (mn10300_reloc_map[i].bfd_reloc_val == code) 781 return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val]; 782 783 return NULL; 784 } 785 786 static reloc_howto_type * 787 bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 788 const char *r_name) 789 { 790 unsigned int i; 791 792 for (i = ARRAY_SIZE (elf_mn10300_howto_table); i--;) 793 if (elf_mn10300_howto_table[i].name != NULL 794 && strcasecmp (elf_mn10300_howto_table[i].name, r_name) == 0) 795 return elf_mn10300_howto_table + i; 796 797 return NULL; 798 } 799 800 /* Set the howto pointer for an MN10300 ELF reloc. */ 801 802 static void 803 mn10300_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 804 arelent *cache_ptr, 805 Elf_Internal_Rela *dst) 806 { 807 unsigned int r_type; 808 809 r_type = ELF32_R_TYPE (dst->r_info); 810 BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX); 811 cache_ptr->howto = elf_mn10300_howto_table + r_type; 812 } 813 814 static int 815 elf_mn10300_tls_transition (struct bfd_link_info * info, 816 int r_type, 817 struct elf_link_hash_entry * h, 818 asection * sec, 819 bfd_boolean counting) 820 { 821 bfd_boolean is_local; 822 823 if (r_type == R_MN10300_TLS_GD 824 && h != NULL 825 && elf_mn10300_hash_entry (h)->tls_type == GOT_TLS_IE) 826 return R_MN10300_TLS_GOTIE; 827 828 if (info->shared) 829 return r_type; 830 831 if (! (sec->flags & SEC_CODE)) 832 return r_type; 833 834 if (! counting && h != NULL && ! elf_hash_table (info)->dynamic_sections_created) 835 is_local = TRUE; 836 else 837 is_local = SYMBOL_CALLS_LOCAL (info, h); 838 839 /* For the main program, these are the transitions we do. */ 840 switch (r_type) 841 { 842 case R_MN10300_TLS_GD: return is_local ? R_MN10300_TLS_LE : R_MN10300_TLS_GOTIE; 843 case R_MN10300_TLS_LD: return R_MN10300_NONE; 844 case R_MN10300_TLS_LDO: return R_MN10300_TLS_LE; 845 case R_MN10300_TLS_IE: 846 case R_MN10300_TLS_GOTIE: return is_local ? R_MN10300_TLS_LE : r_type; 847 } 848 849 return r_type; 850 } 851 852 /* Return the relocation value for @tpoff relocation 853 if STT_TLS virtual address is ADDRESS. */ 854 855 static bfd_vma 856 dtpoff (struct bfd_link_info * info, bfd_vma address) 857 { 858 struct elf_link_hash_table *htab = elf_hash_table (info); 859 860 /* If tls_sec is NULL, we should have signalled an error already. */ 861 if (htab->tls_sec == NULL) 862 return 0; 863 return address - htab->tls_sec->vma; 864 } 865 866 /* Return the relocation value for @tpoff relocation 867 if STT_TLS virtual address is ADDRESS. */ 868 869 static bfd_vma 870 tpoff (struct bfd_link_info * info, bfd_vma address) 871 { 872 struct elf_link_hash_table *htab = elf_hash_table (info); 873 874 /* If tls_sec is NULL, we should have signalled an error already. */ 875 if (htab->tls_sec == NULL) 876 return 0; 877 return address - (htab->tls_size + htab->tls_sec->vma); 878 } 879 880 /* Returns nonzero if there's a R_MN10300_PLT32 reloc that we now need 881 to skip, after this one. The actual value is the offset between 882 this reloc and the PLT reloc. */ 883 884 static int 885 mn10300_do_tls_transition (bfd * input_bfd, 886 unsigned int r_type, 887 unsigned int tls_r_type, 888 bfd_byte * contents, 889 bfd_vma offset) 890 { 891 bfd_byte *op = contents + offset; 892 int gotreg = 0; 893 894 #define TLS_PAIR(r1,r2) ((r1) * R_MN10300_MAX + (r2)) 895 896 /* This is common to all GD/LD transitions, so break it out. */ 897 if (r_type == R_MN10300_TLS_GD 898 || r_type == R_MN10300_TLS_LD) 899 { 900 op -= 2; 901 /* mov imm,d0. */ 902 BFD_ASSERT (bfd_get_8 (input_bfd, op) == 0xFC); 903 BFD_ASSERT (bfd_get_8 (input_bfd, op + 1) == 0xCC); 904 /* add aN,d0. */ 905 BFD_ASSERT (bfd_get_8 (input_bfd, op + 6) == 0xF1); 906 gotreg = (bfd_get_8 (input_bfd, op + 7) & 0x0c) >> 2; 907 /* Call. */ 908 BFD_ASSERT (bfd_get_8 (input_bfd, op + 8) == 0xDD); 909 } 910 911 switch (TLS_PAIR (r_type, tls_r_type)) 912 { 913 case TLS_PAIR (R_MN10300_TLS_GD, R_MN10300_TLS_GOTIE): 914 { 915 /* Keep track of which register we put GOTptr in. */ 916 /* mov (_x@indntpoff,a2),a0. */ 917 memcpy (op, "\xFC\x20\x00\x00\x00\x00", 6); 918 op[1] |= gotreg; 919 /* add e2,a0. */ 920 memcpy (op+6, "\xF9\x78\x28", 3); 921 /* or 0x00000000, d0 - six byte nop. */ 922 memcpy (op+9, "\xFC\xE4\x00\x00\x00\x00", 6); 923 } 924 return 7; 925 926 case TLS_PAIR (R_MN10300_TLS_GD, R_MN10300_TLS_LE): 927 { 928 /* Register is *always* a0. */ 929 /* mov _x@tpoff,a0. */ 930 memcpy (op, "\xFC\xDC\x00\x00\x00\x00", 6); 931 /* add e2,a0. */ 932 memcpy (op+6, "\xF9\x78\x28", 3); 933 /* or 0x00000000, d0 - six byte nop. */ 934 memcpy (op+9, "\xFC\xE4\x00\x00\x00\x00", 6); 935 } 936 return 7; 937 case TLS_PAIR (R_MN10300_TLS_LD, R_MN10300_NONE): 938 { 939 /* Register is *always* a0. */ 940 /* mov e2,a0. */ 941 memcpy (op, "\xF5\x88", 2); 942 /* or 0x00000000, d0 - six byte nop. */ 943 memcpy (op+2, "\xFC\xE4\x00\x00\x00\x00", 6); 944 /* or 0x00000000, e2 - seven byte nop. */ 945 memcpy (op+8, "\xFE\x19\x22\x00\x00\x00\x00", 7); 946 } 947 return 7; 948 949 case TLS_PAIR (R_MN10300_TLS_LDO, R_MN10300_TLS_LE): 950 /* No changes needed, just the reloc change. */ 951 return 0; 952 953 /* These are a little tricky, because we have to detect which 954 opcode is being used (they're different sizes, with the reloc 955 at different offsets within the opcode) and convert each 956 accordingly, copying the operands as needed. The conversions 957 we do are as follows (IE,GOTIE,LE): 958 959 1111 1100 1010 01Dn [-- abs32 --] MOV (x@indntpoff),Dn 960 1111 1100 0000 DnAm [-- abs32 --] MOV (x@gotntpoff,Am),Dn 961 1111 1100 1100 11Dn [-- abs32 --] MOV x@tpoff,Dn 962 963 1111 1100 1010 00An [-- abs32 --] MOV (x@indntpoff),An 964 1111 1100 0010 AnAm [-- abs32 --] MOV (x@gotntpoff,Am),An 965 1111 1100 1101 11An [-- abs32 --] MOV x@tpoff,An 966 967 1111 1110 0000 1110 Rnnn Xxxx [-- abs32 --] MOV (x@indntpoff),Rn 968 1111 1110 0000 1010 Rnnn Rmmm [-- abs32 --] MOV (x@indntpoff,Rm),Rn 969 1111 1110 0000 1000 Rnnn Xxxx [-- abs32 --] MOV x@tpoff,Rn 970 971 Since the GOT pointer is always $a2, we assume the last 972 normally won't happen, but let's be paranoid and plan for the 973 day that GCC optimizes it somewhow. */ 974 975 case TLS_PAIR (R_MN10300_TLS_IE, R_MN10300_TLS_LE): 976 if (op[-2] == 0xFC) 977 { 978 op -= 2; 979 if ((op[1] & 0xFC) == 0xA4) /* Dn */ 980 { 981 op[1] &= 0x03; /* Leaves Dn. */ 982 op[1] |= 0xCC; 983 } 984 else /* An */ 985 { 986 op[1] &= 0x03; /* Leaves An. */ 987 op[1] |= 0xDC; 988 } 989 } 990 else if (op[-3] == 0xFE) 991 op[-2] = 0x08; 992 else 993 abort (); 994 break; 995 996 case TLS_PAIR (R_MN10300_TLS_GOTIE, R_MN10300_TLS_LE): 997 if (op[-2] == 0xFC) 998 { 999 op -= 2; 1000 if ((op[1] & 0xF0) == 0x00) /* Dn */ 1001 { 1002 op[1] &= 0x0C; /* Leaves Dn. */ 1003 op[1] >>= 2; 1004 op[1] |= 0xCC; 1005 } 1006 else /* An */ 1007 { 1008 op[1] &= 0x0C; /* Leaves An. */ 1009 op[1] >>= 2; 1010 op[1] |= 0xDC; 1011 } 1012 } 1013 else if (op[-3] == 0xFE) 1014 op[-2] = 0x08; 1015 else 1016 abort (); 1017 break; 1018 1019 default: 1020 (*_bfd_error_handler) 1021 (_("%s: Unsupported transition from %s to %s"), 1022 bfd_get_filename (input_bfd), 1023 elf_mn10300_howto_table[r_type].name, 1024 elf_mn10300_howto_table[tls_r_type].name); 1025 break; 1026 } 1027 #undef TLS_PAIR 1028 return 0; 1029 } 1030 1031 /* Look through the relocs for a section during the first phase. 1032 Since we don't do .gots or .plts, we just need to consider the 1033 virtual table relocs for gc. */ 1034 1035 static bfd_boolean 1036 mn10300_elf_check_relocs (bfd *abfd, 1037 struct bfd_link_info *info, 1038 asection *sec, 1039 const Elf_Internal_Rela *relocs) 1040 { 1041 struct elf32_mn10300_link_hash_table * htab = elf32_mn10300_hash_table (info); 1042 bfd_boolean sym_diff_reloc_seen; 1043 Elf_Internal_Shdr *symtab_hdr; 1044 Elf_Internal_Sym * isymbuf = NULL; 1045 struct elf_link_hash_entry **sym_hashes; 1046 const Elf_Internal_Rela *rel; 1047 const Elf_Internal_Rela *rel_end; 1048 bfd * dynobj; 1049 bfd_vma * local_got_offsets; 1050 asection * sgot; 1051 asection * srelgot; 1052 asection * sreloc; 1053 bfd_boolean result = FALSE; 1054 1055 sgot = NULL; 1056 srelgot = NULL; 1057 sreloc = NULL; 1058 1059 if (info->relocatable) 1060 return TRUE; 1061 1062 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1063 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 1064 sym_hashes = elf_sym_hashes (abfd); 1065 1066 dynobj = elf_hash_table (info)->dynobj; 1067 local_got_offsets = elf_local_got_offsets (abfd); 1068 rel_end = relocs + sec->reloc_count; 1069 sym_diff_reloc_seen = FALSE; 1070 1071 for (rel = relocs; rel < rel_end; rel++) 1072 { 1073 struct elf_link_hash_entry *h; 1074 unsigned long r_symndx; 1075 unsigned int r_type; 1076 int tls_type = GOT_NORMAL; 1077 1078 r_symndx = ELF32_R_SYM (rel->r_info); 1079 if (r_symndx < symtab_hdr->sh_info) 1080 h = NULL; 1081 else 1082 { 1083 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1084 while (h->root.type == bfd_link_hash_indirect 1085 || h->root.type == bfd_link_hash_warning) 1086 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1087 1088 /* PR15323, ref flags aren't set for references in the same 1089 object. */ 1090 h->root.non_ir_ref = 1; 1091 } 1092 1093 r_type = ELF32_R_TYPE (rel->r_info); 1094 r_type = elf_mn10300_tls_transition (info, r_type, h, sec, TRUE); 1095 1096 /* Some relocs require a global offset table. */ 1097 if (dynobj == NULL) 1098 { 1099 switch (r_type) 1100 { 1101 case R_MN10300_GOT32: 1102 case R_MN10300_GOT24: 1103 case R_MN10300_GOT16: 1104 case R_MN10300_GOTOFF32: 1105 case R_MN10300_GOTOFF24: 1106 case R_MN10300_GOTOFF16: 1107 case R_MN10300_GOTPC32: 1108 case R_MN10300_GOTPC16: 1109 case R_MN10300_TLS_GD: 1110 case R_MN10300_TLS_LD: 1111 case R_MN10300_TLS_GOTIE: 1112 case R_MN10300_TLS_IE: 1113 elf_hash_table (info)->dynobj = dynobj = abfd; 1114 if (! _bfd_mn10300_elf_create_got_section (dynobj, info)) 1115 goto fail; 1116 break; 1117 1118 default: 1119 break; 1120 } 1121 } 1122 1123 switch (r_type) 1124 { 1125 /* This relocation describes the C++ object vtable hierarchy. 1126 Reconstruct it for later use during GC. */ 1127 case R_MN10300_GNU_VTINHERIT: 1128 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1129 goto fail; 1130 break; 1131 1132 /* This relocation describes which C++ vtable entries are actually 1133 used. Record for later use during GC. */ 1134 case R_MN10300_GNU_VTENTRY: 1135 BFD_ASSERT (h != NULL); 1136 if (h != NULL 1137 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1138 goto fail; 1139 break; 1140 1141 case R_MN10300_TLS_LD: 1142 htab->tls_ldm_got.refcount ++; 1143 tls_type = GOT_TLS_LD; 1144 1145 if (htab->tls_ldm_got.got_allocated) 1146 break; 1147 goto create_got; 1148 1149 case R_MN10300_TLS_IE: 1150 case R_MN10300_TLS_GOTIE: 1151 if (info->shared) 1152 info->flags |= DF_STATIC_TLS; 1153 /* Fall through */ 1154 1155 case R_MN10300_TLS_GD: 1156 case R_MN10300_GOT32: 1157 case R_MN10300_GOT24: 1158 case R_MN10300_GOT16: 1159 create_got: 1160 /* This symbol requires a global offset table entry. */ 1161 1162 switch (r_type) 1163 { 1164 case R_MN10300_TLS_IE: 1165 case R_MN10300_TLS_GOTIE: tls_type = GOT_TLS_IE; break; 1166 case R_MN10300_TLS_GD: tls_type = GOT_TLS_GD; break; 1167 default: tls_type = GOT_NORMAL; break; 1168 } 1169 1170 if (sgot == NULL) 1171 { 1172 sgot = htab->root.sgot; 1173 BFD_ASSERT (sgot != NULL); 1174 } 1175 1176 if (srelgot == NULL 1177 && (h != NULL || info->shared)) 1178 { 1179 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 1180 if (srelgot == NULL) 1181 { 1182 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 1183 | SEC_IN_MEMORY | SEC_LINKER_CREATED 1184 | SEC_READONLY); 1185 srelgot = bfd_make_section_anyway_with_flags (dynobj, 1186 ".rela.got", 1187 flags); 1188 if (srelgot == NULL 1189 || ! bfd_set_section_alignment (dynobj, srelgot, 2)) 1190 goto fail; 1191 } 1192 } 1193 1194 if (r_type == R_MN10300_TLS_LD) 1195 { 1196 htab->tls_ldm_got.offset = sgot->size; 1197 htab->tls_ldm_got.got_allocated ++; 1198 } 1199 else if (h != NULL) 1200 { 1201 if (elf_mn10300_hash_entry (h)->tls_type != tls_type 1202 && elf_mn10300_hash_entry (h)->tls_type != GOT_UNKNOWN) 1203 { 1204 if (tls_type == GOT_TLS_IE 1205 && elf_mn10300_hash_entry (h)->tls_type == GOT_TLS_GD) 1206 /* No change - this is ok. */; 1207 else if (tls_type == GOT_TLS_GD 1208 && elf_mn10300_hash_entry (h)->tls_type == GOT_TLS_IE) 1209 /* Transition GD->IE. */ 1210 tls_type = GOT_TLS_IE; 1211 else 1212 (*_bfd_error_handler) 1213 (_("%B: %s' accessed both as normal and thread local symbol"), 1214 abfd, h ? h->root.root.string : "<local>"); 1215 } 1216 1217 elf_mn10300_hash_entry (h)->tls_type = tls_type; 1218 1219 if (h->got.offset != (bfd_vma) -1) 1220 /* We have already allocated space in the .got. */ 1221 break; 1222 1223 h->got.offset = sgot->size; 1224 1225 if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL 1226 /* Make sure this symbol is output as a dynamic symbol. */ 1227 && h->dynindx == -1) 1228 { 1229 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1230 goto fail; 1231 } 1232 1233 srelgot->size += sizeof (Elf32_External_Rela); 1234 if (r_type == R_MN10300_TLS_GD) 1235 srelgot->size += sizeof (Elf32_External_Rela); 1236 } 1237 else 1238 { 1239 /* This is a global offset table entry for a local 1240 symbol. */ 1241 if (local_got_offsets == NULL) 1242 { 1243 size_t size; 1244 unsigned int i; 1245 1246 size = symtab_hdr->sh_info * (sizeof (bfd_vma) + sizeof (char)); 1247 local_got_offsets = bfd_alloc (abfd, size); 1248 1249 if (local_got_offsets == NULL) 1250 goto fail; 1251 1252 elf_local_got_offsets (abfd) = local_got_offsets; 1253 elf_mn10300_local_got_tls_type (abfd) 1254 = (char *) (local_got_offsets + symtab_hdr->sh_info); 1255 1256 for (i = 0; i < symtab_hdr->sh_info; i++) 1257 local_got_offsets[i] = (bfd_vma) -1; 1258 } 1259 1260 if (local_got_offsets[r_symndx] != (bfd_vma) -1) 1261 /* We have already allocated space in the .got. */ 1262 break; 1263 1264 local_got_offsets[r_symndx] = sgot->size; 1265 1266 if (info->shared) 1267 { 1268 /* If we are generating a shared object, we need to 1269 output a R_MN10300_RELATIVE reloc so that the dynamic 1270 linker can adjust this GOT entry. */ 1271 srelgot->size += sizeof (Elf32_External_Rela); 1272 1273 if (r_type == R_MN10300_TLS_GD) 1274 /* And a R_MN10300_TLS_DTPOFF reloc as well. */ 1275 srelgot->size += sizeof (Elf32_External_Rela); 1276 } 1277 1278 elf_mn10300_local_got_tls_type (abfd) [r_symndx] = tls_type; 1279 } 1280 1281 sgot->size += 4; 1282 if (r_type == R_MN10300_TLS_GD 1283 || r_type == R_MN10300_TLS_LD) 1284 sgot->size += 4; 1285 1286 goto need_shared_relocs; 1287 1288 case R_MN10300_PLT32: 1289 case R_MN10300_PLT16: 1290 /* This symbol requires a procedure linkage table entry. We 1291 actually build the entry in adjust_dynamic_symbol, 1292 because this might be a case of linking PIC code which is 1293 never referenced by a dynamic object, in which case we 1294 don't need to generate a procedure linkage table entry 1295 after all. */ 1296 1297 /* If this is a local symbol, we resolve it directly without 1298 creating a procedure linkage table entry. */ 1299 if (h == NULL) 1300 continue; 1301 1302 if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL 1303 || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) 1304 break; 1305 1306 h->needs_plt = 1; 1307 break; 1308 1309 case R_MN10300_24: 1310 case R_MN10300_16: 1311 case R_MN10300_8: 1312 case R_MN10300_PCREL32: 1313 case R_MN10300_PCREL16: 1314 case R_MN10300_PCREL8: 1315 if (h != NULL) 1316 h->non_got_ref = 1; 1317 break; 1318 1319 case R_MN10300_SYM_DIFF: 1320 sym_diff_reloc_seen = TRUE; 1321 break; 1322 1323 case R_MN10300_32: 1324 if (h != NULL) 1325 h->non_got_ref = 1; 1326 1327 need_shared_relocs: 1328 /* If we are creating a shared library, then we 1329 need to copy the reloc into the shared library. */ 1330 if (info->shared 1331 && (sec->flags & SEC_ALLOC) != 0 1332 /* Do not generate a dynamic reloc for a 1333 reloc associated with a SYM_DIFF operation. */ 1334 && ! sym_diff_reloc_seen) 1335 { 1336 asection * sym_section = NULL; 1337 1338 /* Find the section containing the 1339 symbol involved in the relocation. */ 1340 if (h == NULL) 1341 { 1342 Elf_Internal_Sym * isym; 1343 1344 if (isymbuf == NULL) 1345 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 1346 symtab_hdr->sh_info, 0, 1347 NULL, NULL, NULL); 1348 if (isymbuf) 1349 { 1350 isym = isymbuf + r_symndx; 1351 /* All we care about is whether this local symbol is absolute. */ 1352 if (isym->st_shndx == SHN_ABS) 1353 sym_section = bfd_abs_section_ptr; 1354 } 1355 } 1356 else 1357 { 1358 if (h->root.type == bfd_link_hash_defined 1359 || h->root.type == bfd_link_hash_defweak) 1360 sym_section = h->root.u.def.section; 1361 } 1362 1363 /* If the symbol is absolute then the relocation can 1364 be resolved during linking and there is no need for 1365 a dynamic reloc. */ 1366 if (sym_section != bfd_abs_section_ptr) 1367 { 1368 /* When creating a shared object, we must copy these 1369 reloc types into the output file. We create a reloc 1370 section in dynobj and make room for this reloc. */ 1371 if (sreloc == NULL) 1372 { 1373 sreloc = _bfd_elf_make_dynamic_reloc_section 1374 (sec, dynobj, 2, abfd, /*rela?*/ TRUE); 1375 if (sreloc == NULL) 1376 goto fail; 1377 } 1378 1379 sreloc->size += sizeof (Elf32_External_Rela); 1380 } 1381 } 1382 1383 break; 1384 } 1385 1386 if (ELF32_R_TYPE (rel->r_info) != R_MN10300_SYM_DIFF) 1387 sym_diff_reloc_seen = FALSE; 1388 } 1389 1390 result = TRUE; 1391 fail: 1392 if (isymbuf != NULL) 1393 free (isymbuf); 1394 1395 return result; 1396 } 1397 1398 /* Return the section that should be marked against GC for a given 1399 relocation. */ 1400 1401 static asection * 1402 mn10300_elf_gc_mark_hook (asection *sec, 1403 struct bfd_link_info *info, 1404 Elf_Internal_Rela *rel, 1405 struct elf_link_hash_entry *h, 1406 Elf_Internal_Sym *sym) 1407 { 1408 if (h != NULL) 1409 switch (ELF32_R_TYPE (rel->r_info)) 1410 { 1411 case R_MN10300_GNU_VTINHERIT: 1412 case R_MN10300_GNU_VTENTRY: 1413 return NULL; 1414 } 1415 1416 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1417 } 1418 1419 /* Perform a relocation as part of a final link. */ 1420 1421 static bfd_reloc_status_type 1422 mn10300_elf_final_link_relocate (reloc_howto_type *howto, 1423 bfd *input_bfd, 1424 bfd *output_bfd ATTRIBUTE_UNUSED, 1425 asection *input_section, 1426 bfd_byte *contents, 1427 bfd_vma offset, 1428 bfd_vma value, 1429 bfd_vma addend, 1430 struct elf_link_hash_entry * h, 1431 unsigned long symndx, 1432 struct bfd_link_info *info, 1433 asection *sym_sec ATTRIBUTE_UNUSED, 1434 int is_local ATTRIBUTE_UNUSED) 1435 { 1436 struct elf32_mn10300_link_hash_table * htab = elf32_mn10300_hash_table (info); 1437 static asection * sym_diff_section; 1438 static bfd_vma sym_diff_value; 1439 bfd_boolean is_sym_diff_reloc; 1440 unsigned long r_type = howto->type; 1441 bfd_byte * hit_data = contents + offset; 1442 bfd * dynobj; 1443 asection * sgot; 1444 asection * splt; 1445 asection * sreloc; 1446 1447 dynobj = elf_hash_table (info)->dynobj; 1448 sgot = NULL; 1449 splt = NULL; 1450 sreloc = NULL; 1451 1452 switch (r_type) 1453 { 1454 case R_MN10300_24: 1455 case R_MN10300_16: 1456 case R_MN10300_8: 1457 case R_MN10300_PCREL8: 1458 case R_MN10300_PCREL16: 1459 case R_MN10300_PCREL32: 1460 case R_MN10300_GOTOFF32: 1461 case R_MN10300_GOTOFF24: 1462 case R_MN10300_GOTOFF16: 1463 if (info->shared 1464 && (input_section->flags & SEC_ALLOC) != 0 1465 && h != NULL 1466 && ! SYMBOL_REFERENCES_LOCAL (info, h)) 1467 return bfd_reloc_dangerous; 1468 case R_MN10300_GOT32: 1469 /* Issue 2052223: 1470 Taking the address of a protected function in a shared library 1471 is illegal. Issue an error message here. */ 1472 if (info->shared 1473 && (input_section->flags & SEC_ALLOC) != 0 1474 && h != NULL 1475 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED 1476 && (h->type == STT_FUNC || h->type == STT_GNU_IFUNC) 1477 && ! SYMBOL_REFERENCES_LOCAL (info, h)) 1478 return bfd_reloc_dangerous; 1479 } 1480 1481 is_sym_diff_reloc = FALSE; 1482 if (sym_diff_section != NULL) 1483 { 1484 BFD_ASSERT (sym_diff_section == input_section); 1485 1486 switch (r_type) 1487 { 1488 case R_MN10300_32: 1489 case R_MN10300_24: 1490 case R_MN10300_16: 1491 case R_MN10300_8: 1492 value -= sym_diff_value; 1493 /* If we are computing a 32-bit value for the location lists 1494 and the result is 0 then we add one to the value. A zero 1495 value can result because of linker relaxation deleteing 1496 prologue instructions and using a value of 1 (for the begin 1497 and end offsets in the location list entry) results in a 1498 nul entry which does not prevent the following entries from 1499 being parsed. */ 1500 if (r_type == R_MN10300_32 1501 && value == 0 1502 && strcmp (input_section->name, ".debug_loc") == 0) 1503 value = 1; 1504 sym_diff_section = NULL; 1505 is_sym_diff_reloc = TRUE; 1506 break; 1507 1508 default: 1509 sym_diff_section = NULL; 1510 break; 1511 } 1512 } 1513 1514 switch (r_type) 1515 { 1516 case R_MN10300_SYM_DIFF: 1517 BFD_ASSERT (addend == 0); 1518 /* Cache the input section and value. 1519 The offset is unreliable, since relaxation may 1520 have reduced the following reloc's offset. */ 1521 sym_diff_section = input_section; 1522 sym_diff_value = value; 1523 return bfd_reloc_ok; 1524 1525 case R_MN10300_ALIGN: 1526 case R_MN10300_NONE: 1527 return bfd_reloc_ok; 1528 1529 case R_MN10300_32: 1530 if (info->shared 1531 /* Do not generate relocs when an R_MN10300_32 has been used 1532 with an R_MN10300_SYM_DIFF to compute a difference of two 1533 symbols. */ 1534 && is_sym_diff_reloc == FALSE 1535 /* Also, do not generate a reloc when the symbol associated 1536 with the R_MN10300_32 reloc is absolute - there is no 1537 need for a run time computation in this case. */ 1538 && sym_sec != bfd_abs_section_ptr 1539 /* If the section is not going to be allocated at load time 1540 then there is no need to generate relocs for it. */ 1541 && (input_section->flags & SEC_ALLOC) != 0) 1542 { 1543 Elf_Internal_Rela outrel; 1544 bfd_boolean skip, relocate; 1545 1546 /* When generating a shared object, these relocations are 1547 copied into the output file to be resolved at run 1548 time. */ 1549 if (sreloc == NULL) 1550 { 1551 sreloc = _bfd_elf_get_dynamic_reloc_section 1552 (input_bfd, input_section, /*rela?*/ TRUE); 1553 if (sreloc == NULL) 1554 return FALSE; 1555 } 1556 1557 skip = FALSE; 1558 1559 outrel.r_offset = _bfd_elf_section_offset (input_bfd, info, 1560 input_section, offset); 1561 if (outrel.r_offset == (bfd_vma) -1) 1562 skip = TRUE; 1563 1564 outrel.r_offset += (input_section->output_section->vma 1565 + input_section->output_offset); 1566 1567 if (skip) 1568 { 1569 memset (&outrel, 0, sizeof outrel); 1570 relocate = FALSE; 1571 } 1572 else 1573 { 1574 /* h->dynindx may be -1 if this symbol was marked to 1575 become local. */ 1576 if (h == NULL 1577 || SYMBOL_REFERENCES_LOCAL (info, h)) 1578 { 1579 relocate = TRUE; 1580 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE); 1581 outrel.r_addend = value + addend; 1582 } 1583 else 1584 { 1585 BFD_ASSERT (h->dynindx != -1); 1586 relocate = FALSE; 1587 outrel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_32); 1588 outrel.r_addend = value + addend; 1589 } 1590 } 1591 1592 bfd_elf32_swap_reloca_out (output_bfd, &outrel, 1593 (bfd_byte *) (((Elf32_External_Rela *) sreloc->contents) 1594 + sreloc->reloc_count)); 1595 ++sreloc->reloc_count; 1596 1597 /* If this reloc is against an external symbol, we do 1598 not want to fiddle with the addend. Otherwise, we 1599 need to include the symbol value so that it becomes 1600 an addend for the dynamic reloc. */ 1601 if (! relocate) 1602 return bfd_reloc_ok; 1603 } 1604 value += addend; 1605 bfd_put_32 (input_bfd, value, hit_data); 1606 return bfd_reloc_ok; 1607 1608 case R_MN10300_24: 1609 value += addend; 1610 1611 if ((long) value > 0x7fffff || (long) value < -0x800000) 1612 return bfd_reloc_overflow; 1613 1614 bfd_put_8 (input_bfd, value & 0xff, hit_data); 1615 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1); 1616 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2); 1617 return bfd_reloc_ok; 1618 1619 case R_MN10300_16: 1620 value += addend; 1621 1622 if ((long) value > 0x7fff || (long) value < -0x8000) 1623 return bfd_reloc_overflow; 1624 1625 bfd_put_16 (input_bfd, value, hit_data); 1626 return bfd_reloc_ok; 1627 1628 case R_MN10300_8: 1629 value += addend; 1630 1631 if ((long) value > 0x7f || (long) value < -0x80) 1632 return bfd_reloc_overflow; 1633 1634 bfd_put_8 (input_bfd, value, hit_data); 1635 return bfd_reloc_ok; 1636 1637 case R_MN10300_PCREL8: 1638 value -= (input_section->output_section->vma 1639 + input_section->output_offset); 1640 value -= offset; 1641 value += addend; 1642 1643 if ((long) value > 0x7f || (long) value < -0x80) 1644 return bfd_reloc_overflow; 1645 1646 bfd_put_8 (input_bfd, value, hit_data); 1647 return bfd_reloc_ok; 1648 1649 case R_MN10300_PCREL16: 1650 value -= (input_section->output_section->vma 1651 + input_section->output_offset); 1652 value -= offset; 1653 value += addend; 1654 1655 if ((long) value > 0x7fff || (long) value < -0x8000) 1656 return bfd_reloc_overflow; 1657 1658 bfd_put_16 (input_bfd, value, hit_data); 1659 return bfd_reloc_ok; 1660 1661 case R_MN10300_PCREL32: 1662 value -= (input_section->output_section->vma 1663 + input_section->output_offset); 1664 value -= offset; 1665 value += addend; 1666 1667 bfd_put_32 (input_bfd, value, hit_data); 1668 return bfd_reloc_ok; 1669 1670 case R_MN10300_GNU_VTINHERIT: 1671 case R_MN10300_GNU_VTENTRY: 1672 return bfd_reloc_ok; 1673 1674 case R_MN10300_GOTPC32: 1675 if (dynobj == NULL) 1676 return bfd_reloc_dangerous; 1677 1678 /* Use global offset table as symbol value. */ 1679 value = htab->root.sgot->output_section->vma; 1680 value -= (input_section->output_section->vma 1681 + input_section->output_offset); 1682 value -= offset; 1683 value += addend; 1684 1685 bfd_put_32 (input_bfd, value, hit_data); 1686 return bfd_reloc_ok; 1687 1688 case R_MN10300_GOTPC16: 1689 if (dynobj == NULL) 1690 return bfd_reloc_dangerous; 1691 1692 /* Use global offset table as symbol value. */ 1693 value = htab->root.sgot->output_section->vma; 1694 value -= (input_section->output_section->vma 1695 + input_section->output_offset); 1696 value -= offset; 1697 value += addend; 1698 1699 if ((long) value > 0x7fff || (long) value < -0x8000) 1700 return bfd_reloc_overflow; 1701 1702 bfd_put_16 (input_bfd, value, hit_data); 1703 return bfd_reloc_ok; 1704 1705 case R_MN10300_GOTOFF32: 1706 if (dynobj == NULL) 1707 return bfd_reloc_dangerous; 1708 1709 value -= htab->root.sgot->output_section->vma; 1710 value += addend; 1711 1712 bfd_put_32 (input_bfd, value, hit_data); 1713 return bfd_reloc_ok; 1714 1715 case R_MN10300_GOTOFF24: 1716 if (dynobj == NULL) 1717 return bfd_reloc_dangerous; 1718 1719 value -= htab->root.sgot->output_section->vma; 1720 value += addend; 1721 1722 if ((long) value > 0x7fffff || (long) value < -0x800000) 1723 return bfd_reloc_overflow; 1724 1725 bfd_put_8 (input_bfd, value, hit_data); 1726 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1); 1727 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2); 1728 return bfd_reloc_ok; 1729 1730 case R_MN10300_GOTOFF16: 1731 if (dynobj == NULL) 1732 return bfd_reloc_dangerous; 1733 1734 value -= htab->root.sgot->output_section->vma; 1735 value += addend; 1736 1737 if ((long) value > 0x7fff || (long) value < -0x8000) 1738 return bfd_reloc_overflow; 1739 1740 bfd_put_16 (input_bfd, value, hit_data); 1741 return bfd_reloc_ok; 1742 1743 case R_MN10300_PLT32: 1744 if (h != NULL 1745 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL 1746 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN 1747 && h->plt.offset != (bfd_vma) -1) 1748 { 1749 if (dynobj == NULL) 1750 return bfd_reloc_dangerous; 1751 1752 splt = htab->root.splt; 1753 value = (splt->output_section->vma 1754 + splt->output_offset 1755 + h->plt.offset) - value; 1756 } 1757 1758 value -= (input_section->output_section->vma 1759 + input_section->output_offset); 1760 value -= offset; 1761 value += addend; 1762 1763 bfd_put_32 (input_bfd, value, hit_data); 1764 return bfd_reloc_ok; 1765 1766 case R_MN10300_PLT16: 1767 if (h != NULL 1768 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL 1769 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN 1770 && h->plt.offset != (bfd_vma) -1) 1771 { 1772 if (dynobj == NULL) 1773 return bfd_reloc_dangerous; 1774 1775 splt = htab->root.splt; 1776 value = (splt->output_section->vma 1777 + splt->output_offset 1778 + h->plt.offset) - value; 1779 } 1780 1781 value -= (input_section->output_section->vma 1782 + input_section->output_offset); 1783 value -= offset; 1784 value += addend; 1785 1786 if ((long) value > 0x7fff || (long) value < -0x8000) 1787 return bfd_reloc_overflow; 1788 1789 bfd_put_16 (input_bfd, value, hit_data); 1790 return bfd_reloc_ok; 1791 1792 case R_MN10300_TLS_LDO: 1793 value = dtpoff (info, value); 1794 bfd_put_32 (input_bfd, value + addend, hit_data); 1795 return bfd_reloc_ok; 1796 1797 case R_MN10300_TLS_LE: 1798 value = tpoff (info, value); 1799 bfd_put_32 (input_bfd, value + addend, hit_data); 1800 return bfd_reloc_ok; 1801 1802 case R_MN10300_TLS_LD: 1803 if (dynobj == NULL) 1804 return bfd_reloc_dangerous; 1805 1806 sgot = htab->root.sgot; 1807 BFD_ASSERT (sgot != NULL); 1808 value = htab->tls_ldm_got.offset + sgot->output_offset; 1809 bfd_put_32 (input_bfd, value, hit_data); 1810 1811 if (!htab->tls_ldm_got.rel_emitted) 1812 { 1813 asection * srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 1814 Elf_Internal_Rela rel; 1815 1816 BFD_ASSERT (srelgot != NULL); 1817 htab->tls_ldm_got.rel_emitted ++; 1818 rel.r_offset = (sgot->output_section->vma 1819 + sgot->output_offset 1820 + htab->tls_ldm_got.offset); 1821 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + htab->tls_ldm_got.offset); 1822 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + htab->tls_ldm_got.offset+4); 1823 rel.r_info = ELF32_R_INFO (0, R_MN10300_TLS_DTPMOD); 1824 rel.r_addend = 0; 1825 bfd_elf32_swap_reloca_out (output_bfd, & rel, 1826 (bfd_byte *) ((Elf32_External_Rela *) srelgot->contents 1827 + srelgot->reloc_count)); 1828 ++ srelgot->reloc_count; 1829 } 1830 1831 return bfd_reloc_ok; 1832 1833 case R_MN10300_TLS_GOTIE: 1834 value = tpoff (info, value); 1835 /* Fall Through. */ 1836 1837 case R_MN10300_TLS_GD: 1838 case R_MN10300_TLS_IE: 1839 case R_MN10300_GOT32: 1840 case R_MN10300_GOT24: 1841 case R_MN10300_GOT16: 1842 if (dynobj == NULL) 1843 return bfd_reloc_dangerous; 1844 1845 sgot = htab->root.sgot; 1846 if (r_type == R_MN10300_TLS_GD) 1847 value = dtpoff (info, value); 1848 1849 if (h != NULL) 1850 { 1851 bfd_vma off; 1852 1853 off = h->got.offset; 1854 /* Offsets in the GOT are allocated in check_relocs 1855 which is not called for shared libraries... */ 1856 if (off == (bfd_vma) -1) 1857 off = 0; 1858 1859 if (sgot->contents != NULL 1860 && (! elf_hash_table (info)->dynamic_sections_created 1861 || SYMBOL_REFERENCES_LOCAL (info, h))) 1862 /* This is actually a static link, or it is a 1863 -Bsymbolic link and the symbol is defined 1864 locally, or the symbol was forced to be local 1865 because of a version file. We must initialize 1866 this entry in the global offset table. 1867 1868 When doing a dynamic link, we create a .rela.got 1869 relocation entry to initialize the value. This 1870 is done in the finish_dynamic_symbol routine. */ 1871 bfd_put_32 (output_bfd, value, 1872 sgot->contents + off); 1873 1874 value = sgot->output_offset + off; 1875 } 1876 else 1877 { 1878 bfd_vma off; 1879 1880 off = elf_local_got_offsets (input_bfd)[symndx]; 1881 1882 if (off & 1) 1883 bfd_put_32 (output_bfd, value, sgot->contents + (off & ~ 1)); 1884 else 1885 { 1886 bfd_put_32 (output_bfd, value, sgot->contents + off); 1887 1888 if (info->shared) 1889 { 1890 asection * srelgot; 1891 Elf_Internal_Rela outrel; 1892 1893 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 1894 BFD_ASSERT (srelgot != NULL); 1895 1896 outrel.r_offset = (sgot->output_section->vma 1897 + sgot->output_offset 1898 + off); 1899 switch (r_type) 1900 { 1901 case R_MN10300_TLS_GD: 1902 outrel.r_info = ELF32_R_INFO (0, R_MN10300_TLS_DTPOFF); 1903 outrel.r_offset = (sgot->output_section->vma 1904 + sgot->output_offset 1905 + off + 4); 1906 bfd_elf32_swap_reloca_out (output_bfd, & outrel, 1907 (bfd_byte *) (((Elf32_External_Rela *) 1908 srelgot->contents) 1909 + srelgot->reloc_count)); 1910 ++ srelgot->reloc_count; 1911 outrel.r_info = ELF32_R_INFO (0, R_MN10300_TLS_DTPMOD); 1912 break; 1913 case R_MN10300_TLS_GOTIE: 1914 case R_MN10300_TLS_IE: 1915 outrel.r_info = ELF32_R_INFO (0, R_MN10300_TLS_TPOFF); 1916 break; 1917 default: 1918 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE); 1919 break; 1920 } 1921 1922 outrel.r_addend = value; 1923 bfd_elf32_swap_reloca_out (output_bfd, &outrel, 1924 (bfd_byte *) (((Elf32_External_Rela *) 1925 srelgot->contents) 1926 + srelgot->reloc_count)); 1927 ++ srelgot->reloc_count; 1928 elf_local_got_offsets (input_bfd)[symndx] |= 1; 1929 } 1930 1931 value = sgot->output_offset + (off & ~(bfd_vma) 1); 1932 } 1933 } 1934 1935 value += addend; 1936 1937 if (r_type == R_MN10300_TLS_IE) 1938 { 1939 value += sgot->output_section->vma; 1940 bfd_put_32 (input_bfd, value, hit_data); 1941 return bfd_reloc_ok; 1942 } 1943 else if (r_type == R_MN10300_TLS_GOTIE 1944 || r_type == R_MN10300_TLS_GD 1945 || r_type == R_MN10300_TLS_LD) 1946 { 1947 bfd_put_32 (input_bfd, value, hit_data); 1948 return bfd_reloc_ok; 1949 } 1950 else if (r_type == R_MN10300_GOT32) 1951 { 1952 bfd_put_32 (input_bfd, value, hit_data); 1953 return bfd_reloc_ok; 1954 } 1955 else if (r_type == R_MN10300_GOT24) 1956 { 1957 if ((long) value > 0x7fffff || (long) value < -0x800000) 1958 return bfd_reloc_overflow; 1959 1960 bfd_put_8 (input_bfd, value & 0xff, hit_data); 1961 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1); 1962 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2); 1963 return bfd_reloc_ok; 1964 } 1965 else if (r_type == R_MN10300_GOT16) 1966 { 1967 if ((long) value > 0x7fff || (long) value < -0x8000) 1968 return bfd_reloc_overflow; 1969 1970 bfd_put_16 (input_bfd, value, hit_data); 1971 return bfd_reloc_ok; 1972 } 1973 /* Fall through. */ 1974 1975 default: 1976 return bfd_reloc_notsupported; 1977 } 1978 } 1979 1980 /* Relocate an MN10300 ELF section. */ 1981 1982 static bfd_boolean 1983 mn10300_elf_relocate_section (bfd *output_bfd, 1984 struct bfd_link_info *info, 1985 bfd *input_bfd, 1986 asection *input_section, 1987 bfd_byte *contents, 1988 Elf_Internal_Rela *relocs, 1989 Elf_Internal_Sym *local_syms, 1990 asection **local_sections) 1991 { 1992 Elf_Internal_Shdr *symtab_hdr; 1993 struct elf_link_hash_entry **sym_hashes; 1994 Elf_Internal_Rela *rel, *relend; 1995 Elf_Internal_Rela * trel; 1996 1997 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 1998 sym_hashes = elf_sym_hashes (input_bfd); 1999 2000 rel = relocs; 2001 relend = relocs + input_section->reloc_count; 2002 for (; rel < relend; rel++) 2003 { 2004 int r_type; 2005 reloc_howto_type *howto; 2006 unsigned long r_symndx; 2007 Elf_Internal_Sym *sym; 2008 asection *sec; 2009 struct elf32_mn10300_link_hash_entry *h; 2010 bfd_vma relocation; 2011 bfd_reloc_status_type r; 2012 int tls_r_type; 2013 bfd_boolean unresolved_reloc = FALSE; 2014 bfd_boolean warned, ignored; 2015 struct elf_link_hash_entry * hh; 2016 2017 relocation = 0; 2018 r_symndx = ELF32_R_SYM (rel->r_info); 2019 r_type = ELF32_R_TYPE (rel->r_info); 2020 howto = elf_mn10300_howto_table + r_type; 2021 2022 /* Just skip the vtable gc relocs. */ 2023 if (r_type == R_MN10300_GNU_VTINHERIT 2024 || r_type == R_MN10300_GNU_VTENTRY) 2025 continue; 2026 2027 h = NULL; 2028 sym = NULL; 2029 sec = NULL; 2030 if (r_symndx < symtab_hdr->sh_info) 2031 hh = NULL; 2032 else 2033 { 2034 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 2035 r_symndx, symtab_hdr, sym_hashes, 2036 hh, sec, relocation, 2037 unresolved_reloc, warned, ignored); 2038 } 2039 h = elf_mn10300_hash_entry (hh); 2040 2041 tls_r_type = elf_mn10300_tls_transition (info, r_type, hh, input_section, 0); 2042 if (tls_r_type != r_type) 2043 { 2044 bfd_boolean had_plt; 2045 2046 had_plt = mn10300_do_tls_transition (input_bfd, r_type, tls_r_type, 2047 contents, rel->r_offset); 2048 r_type = tls_r_type; 2049 howto = elf_mn10300_howto_table + r_type; 2050 2051 if (had_plt) 2052 for (trel = rel+1; trel < relend; trel++) 2053 if ((ELF32_R_TYPE (trel->r_info) == R_MN10300_PLT32 2054 || ELF32_R_TYPE (trel->r_info) == R_MN10300_PCREL32) 2055 && rel->r_offset + had_plt == trel->r_offset) 2056 trel->r_info = ELF32_R_INFO (0, R_MN10300_NONE); 2057 } 2058 2059 if (r_symndx < symtab_hdr->sh_info) 2060 { 2061 sym = local_syms + r_symndx; 2062 sec = local_sections[r_symndx]; 2063 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2064 } 2065 else 2066 { 2067 if ((h->root.root.type == bfd_link_hash_defined 2068 || h->root.root.type == bfd_link_hash_defweak) 2069 && ( r_type == R_MN10300_GOTPC32 2070 || r_type == R_MN10300_GOTPC16 2071 || (( r_type == R_MN10300_PLT32 2072 || r_type == R_MN10300_PLT16) 2073 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL 2074 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN 2075 && h->root.plt.offset != (bfd_vma) -1) 2076 || (( r_type == R_MN10300_GOT32 2077 || r_type == R_MN10300_GOT24 2078 || r_type == R_MN10300_TLS_GD 2079 || r_type == R_MN10300_TLS_LD 2080 || r_type == R_MN10300_TLS_GOTIE 2081 || r_type == R_MN10300_TLS_IE 2082 || r_type == R_MN10300_GOT16) 2083 && elf_hash_table (info)->dynamic_sections_created 2084 && !SYMBOL_REFERENCES_LOCAL (info, hh)) 2085 || (r_type == R_MN10300_32 2086 /* _32 relocs in executables force _COPY relocs, 2087 such that the address of the symbol ends up 2088 being local. */ 2089 && !info->executable 2090 && !SYMBOL_REFERENCES_LOCAL (info, hh) 2091 && ((input_section->flags & SEC_ALLOC) != 0 2092 /* DWARF will emit R_MN10300_32 relocations 2093 in its sections against symbols defined 2094 externally in shared libraries. We can't 2095 do anything with them here. */ 2096 || ((input_section->flags & SEC_DEBUGGING) != 0 2097 && h->root.def_dynamic))))) 2098 /* In these cases, we don't need the relocation 2099 value. We check specially because in some 2100 obscure cases sec->output_section will be NULL. */ 2101 relocation = 0; 2102 2103 else if (!info->relocatable && unresolved_reloc 2104 && _bfd_elf_section_offset (output_bfd, info, input_section, 2105 rel->r_offset) != (bfd_vma) -1) 2106 2107 (*_bfd_error_handler) 2108 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), 2109 input_bfd, 2110 input_section, 2111 (long) rel->r_offset, 2112 howto->name, 2113 h->root.root.root.string); 2114 } 2115 2116 if (sec != NULL && discarded_section (sec)) 2117 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2118 rel, 1, relend, howto, 0, contents); 2119 2120 if (info->relocatable) 2121 continue; 2122 2123 r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd, 2124 input_section, 2125 contents, rel->r_offset, 2126 relocation, rel->r_addend, 2127 (struct elf_link_hash_entry *) h, 2128 r_symndx, 2129 info, sec, h == NULL); 2130 2131 if (r != bfd_reloc_ok) 2132 { 2133 const char *name; 2134 const char *msg = NULL; 2135 2136 if (h != NULL) 2137 name = h->root.root.root.string; 2138 else 2139 { 2140 name = (bfd_elf_string_from_elf_section 2141 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 2142 if (name == NULL || *name == '\0') 2143 name = bfd_section_name (input_bfd, sec); 2144 } 2145 2146 switch (r) 2147 { 2148 case bfd_reloc_overflow: 2149 if (! ((*info->callbacks->reloc_overflow) 2150 (info, (h ? &h->root.root : NULL), name, 2151 howto->name, (bfd_vma) 0, input_bfd, 2152 input_section, rel->r_offset))) 2153 return FALSE; 2154 break; 2155 2156 case bfd_reloc_undefined: 2157 if (! ((*info->callbacks->undefined_symbol) 2158 (info, name, input_bfd, input_section, 2159 rel->r_offset, TRUE))) 2160 return FALSE; 2161 break; 2162 2163 case bfd_reloc_outofrange: 2164 msg = _("internal error: out of range error"); 2165 goto common_error; 2166 2167 case bfd_reloc_notsupported: 2168 msg = _("internal error: unsupported relocation error"); 2169 goto common_error; 2170 2171 case bfd_reloc_dangerous: 2172 if (r_type == R_MN10300_PCREL32) 2173 msg = _("error: inappropriate relocation type for shared" 2174 " library (did you forget -fpic?)"); 2175 else if (r_type == R_MN10300_GOT32) 2176 msg = _("%B: taking the address of protected function" 2177 " '%s' cannot be done when making a shared library"); 2178 else 2179 msg = _("internal error: suspicious relocation type used" 2180 " in shared library"); 2181 goto common_error; 2182 2183 default: 2184 msg = _("internal error: unknown error"); 2185 /* Fall through. */ 2186 2187 common_error: 2188 _bfd_error_handler (msg, input_bfd, name); 2189 bfd_set_error (bfd_error_bad_value); 2190 return FALSE; 2191 } 2192 } 2193 } 2194 2195 return TRUE; 2196 } 2197 2198 /* Finish initializing one hash table entry. */ 2199 2200 static bfd_boolean 2201 elf32_mn10300_finish_hash_table_entry (struct bfd_hash_entry *gen_entry, 2202 void * in_args) 2203 { 2204 struct elf32_mn10300_link_hash_entry *entry; 2205 struct bfd_link_info *link_info = (struct bfd_link_info *) in_args; 2206 unsigned int byte_count = 0; 2207 2208 entry = (struct elf32_mn10300_link_hash_entry *) gen_entry; 2209 2210 /* If we already know we want to convert "call" to "calls" for calls 2211 to this symbol, then return now. */ 2212 if (entry->flags == MN10300_CONVERT_CALL_TO_CALLS) 2213 return TRUE; 2214 2215 /* If there are no named calls to this symbol, or there's nothing we 2216 can move from the function itself into the "call" instruction, 2217 then note that all "call" instructions should be converted into 2218 "calls" instructions and return. If a symbol is available for 2219 dynamic symbol resolution (overridable or overriding), avoid 2220 custom calling conventions. */ 2221 if (entry->direct_calls == 0 2222 || (entry->stack_size == 0 && entry->movm_args == 0) 2223 || (elf_hash_table (link_info)->dynamic_sections_created 2224 && ELF_ST_VISIBILITY (entry->root.other) != STV_INTERNAL 2225 && ELF_ST_VISIBILITY (entry->root.other) != STV_HIDDEN)) 2226 { 2227 /* Make a note that we should convert "call" instructions to "calls" 2228 instructions for calls to this symbol. */ 2229 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS; 2230 return TRUE; 2231 } 2232 2233 /* We may be able to move some instructions from the function itself into 2234 the "call" instruction. Count how many bytes we might be able to 2235 eliminate in the function itself. */ 2236 2237 /* A movm instruction is two bytes. */ 2238 if (entry->movm_args) 2239 byte_count += 2; 2240 2241 /* Count the insn to allocate stack space too. */ 2242 if (entry->stack_size > 0) 2243 { 2244 if (entry->stack_size <= 128) 2245 byte_count += 3; 2246 else 2247 byte_count += 4; 2248 } 2249 2250 /* If using "call" will result in larger code, then turn all 2251 the associated "call" instructions into "calls" instructions. */ 2252 if (byte_count < entry->direct_calls) 2253 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS; 2254 2255 /* This routine never fails. */ 2256 return TRUE; 2257 } 2258 2259 /* Used to count hash table entries. */ 2260 2261 static bfd_boolean 2262 elf32_mn10300_count_hash_table_entries (struct bfd_hash_entry *gen_entry ATTRIBUTE_UNUSED, 2263 void * in_args) 2264 { 2265 int *count = (int *) in_args; 2266 2267 (*count) ++; 2268 return TRUE; 2269 } 2270 2271 /* Used to enumerate hash table entries into a linear array. */ 2272 2273 static bfd_boolean 2274 elf32_mn10300_list_hash_table_entries (struct bfd_hash_entry *gen_entry, 2275 void * in_args) 2276 { 2277 struct bfd_hash_entry ***ptr = (struct bfd_hash_entry ***) in_args; 2278 2279 **ptr = gen_entry; 2280 (*ptr) ++; 2281 return TRUE; 2282 } 2283 2284 /* Used to sort the array created by the above. */ 2285 2286 static int 2287 sort_by_value (const void *va, const void *vb) 2288 { 2289 struct elf32_mn10300_link_hash_entry *a 2290 = *(struct elf32_mn10300_link_hash_entry **) va; 2291 struct elf32_mn10300_link_hash_entry *b 2292 = *(struct elf32_mn10300_link_hash_entry **) vb; 2293 2294 return a->value - b->value; 2295 } 2296 2297 /* Compute the stack size and movm arguments for the function 2298 referred to by HASH at address ADDR in section with 2299 contents CONTENTS, store the information in the hash table. */ 2300 2301 static void 2302 compute_function_info (bfd *abfd, 2303 struct elf32_mn10300_link_hash_entry *hash, 2304 bfd_vma addr, 2305 unsigned char *contents) 2306 { 2307 unsigned char byte1, byte2; 2308 /* We only care about a very small subset of the possible prologue 2309 sequences here. Basically we look for: 2310 2311 movm [d2,d3,a2,a3],sp (optional) 2312 add <size>,sp (optional, and only for sizes which fit in an unsigned 2313 8 bit number) 2314 2315 If we find anything else, we quit. */ 2316 2317 /* Look for movm [regs],sp. */ 2318 byte1 = bfd_get_8 (abfd, contents + addr); 2319 byte2 = bfd_get_8 (abfd, contents + addr + 1); 2320 2321 if (byte1 == 0xcf) 2322 { 2323 hash->movm_args = byte2; 2324 addr += 2; 2325 byte1 = bfd_get_8 (abfd, contents + addr); 2326 byte2 = bfd_get_8 (abfd, contents + addr + 1); 2327 } 2328 2329 /* Now figure out how much stack space will be allocated by the movm 2330 instruction. We need this kept separate from the function's normal 2331 stack space. */ 2332 if (hash->movm_args) 2333 { 2334 /* Space for d2. */ 2335 if (hash->movm_args & 0x80) 2336 hash->movm_stack_size += 4; 2337 2338 /* Space for d3. */ 2339 if (hash->movm_args & 0x40) 2340 hash->movm_stack_size += 4; 2341 2342 /* Space for a2. */ 2343 if (hash->movm_args & 0x20) 2344 hash->movm_stack_size += 4; 2345 2346 /* Space for a3. */ 2347 if (hash->movm_args & 0x10) 2348 hash->movm_stack_size += 4; 2349 2350 /* "other" space. d0, d1, a0, a1, mdr, lir, lar, 4 byte pad. */ 2351 if (hash->movm_args & 0x08) 2352 hash->movm_stack_size += 8 * 4; 2353 2354 if (bfd_get_mach (abfd) == bfd_mach_am33 2355 || bfd_get_mach (abfd) == bfd_mach_am33_2) 2356 { 2357 /* "exother" space. e0, e1, mdrq, mcrh, mcrl, mcvf */ 2358 if (hash->movm_args & 0x1) 2359 hash->movm_stack_size += 6 * 4; 2360 2361 /* exreg1 space. e4, e5, e6, e7 */ 2362 if (hash->movm_args & 0x2) 2363 hash->movm_stack_size += 4 * 4; 2364 2365 /* exreg0 space. e2, e3 */ 2366 if (hash->movm_args & 0x4) 2367 hash->movm_stack_size += 2 * 4; 2368 } 2369 } 2370 2371 /* Now look for the two stack adjustment variants. */ 2372 if (byte1 == 0xf8 && byte2 == 0xfe) 2373 { 2374 int temp = bfd_get_8 (abfd, contents + addr + 2); 2375 temp = ((temp & 0xff) ^ (~0x7f)) + 0x80; 2376 2377 hash->stack_size = -temp; 2378 } 2379 else if (byte1 == 0xfa && byte2 == 0xfe) 2380 { 2381 int temp = bfd_get_16 (abfd, contents + addr + 2); 2382 temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000; 2383 temp = -temp; 2384 2385 if (temp < 255) 2386 hash->stack_size = temp; 2387 } 2388 2389 /* If the total stack to be allocated by the call instruction is more 2390 than 255 bytes, then we can't remove the stack adjustment by using 2391 "call" (we might still be able to remove the "movm" instruction. */ 2392 if (hash->stack_size + hash->movm_stack_size > 255) 2393 hash->stack_size = 0; 2394 } 2395 2396 /* Delete some bytes from a section while relaxing. */ 2397 2398 static bfd_boolean 2399 mn10300_elf_relax_delete_bytes (bfd *abfd, 2400 asection *sec, 2401 bfd_vma addr, 2402 int count) 2403 { 2404 Elf_Internal_Shdr *symtab_hdr; 2405 unsigned int sec_shndx; 2406 bfd_byte *contents; 2407 Elf_Internal_Rela *irel, *irelend; 2408 Elf_Internal_Rela *irelalign; 2409 bfd_vma toaddr; 2410 Elf_Internal_Sym *isym, *isymend; 2411 struct elf_link_hash_entry **sym_hashes; 2412 struct elf_link_hash_entry **end_hashes; 2413 unsigned int symcount; 2414 2415 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); 2416 2417 contents = elf_section_data (sec)->this_hdr.contents; 2418 2419 irelalign = NULL; 2420 toaddr = sec->size; 2421 2422 irel = elf_section_data (sec)->relocs; 2423 irelend = irel + sec->reloc_count; 2424 2425 if (sec->reloc_count > 0) 2426 { 2427 /* If there is an align reloc at the end of the section ignore it. 2428 GAS creates these relocs for reasons of its own, and they just 2429 serve to keep the section artifically inflated. */ 2430 if (ELF32_R_TYPE ((irelend - 1)->r_info) == (int) R_MN10300_ALIGN) 2431 --irelend; 2432 2433 /* The deletion must stop at the next ALIGN reloc for an aligment 2434 power larger than, or not a multiple of, the number of bytes we 2435 are deleting. */ 2436 for (; irel < irelend; irel++) 2437 { 2438 int alignment = 1 << irel->r_addend; 2439 2440 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_ALIGN 2441 && irel->r_offset > addr 2442 && irel->r_offset < toaddr 2443 && (count < alignment 2444 || alignment % count != 0)) 2445 { 2446 irelalign = irel; 2447 toaddr = irel->r_offset; 2448 break; 2449 } 2450 } 2451 } 2452 2453 /* Actually delete the bytes. */ 2454 memmove (contents + addr, contents + addr + count, 2455 (size_t) (toaddr - addr - count)); 2456 2457 /* Adjust the section's size if we are shrinking it, or else 2458 pad the bytes between the end of the shrunken region and 2459 the start of the next region with NOP codes. */ 2460 if (irelalign == NULL) 2461 { 2462 sec->size -= count; 2463 /* Include symbols at the end of the section, but 2464 not at the end of a sub-region of the section. */ 2465 toaddr ++; 2466 } 2467 else 2468 { 2469 int i; 2470 2471 #define NOP_OPCODE 0xcb 2472 2473 for (i = 0; i < count; i ++) 2474 bfd_put_8 (abfd, (bfd_vma) NOP_OPCODE, contents + toaddr - count + i); 2475 } 2476 2477 /* Adjust all the relocs. */ 2478 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) 2479 { 2480 /* Get the new reloc address. */ 2481 if ((irel->r_offset > addr 2482 && irel->r_offset < toaddr) 2483 || (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_ALIGN 2484 && irel->r_offset == toaddr)) 2485 irel->r_offset -= count; 2486 } 2487 2488 /* Adjust the local symbols in the section, reducing their value 2489 by the number of bytes deleted. Note - symbols within the deleted 2490 region are moved to the address of the start of the region, which 2491 actually means that they will address the byte beyond the end of 2492 the region once the deletion has been completed. */ 2493 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 2494 isym = (Elf_Internal_Sym *) symtab_hdr->contents; 2495 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) 2496 { 2497 if (isym->st_shndx == sec_shndx 2498 && isym->st_value > addr 2499 && isym->st_value < toaddr) 2500 { 2501 if (isym->st_value < addr + count) 2502 isym->st_value = addr; 2503 else 2504 isym->st_value -= count; 2505 } 2506 /* Adjust the function symbol's size as well. */ 2507 else if (isym->st_shndx == sec_shndx 2508 && ELF_ST_TYPE (isym->st_info) == STT_FUNC 2509 && isym->st_value + isym->st_size > addr 2510 && isym->st_value + isym->st_size < toaddr) 2511 isym->st_size -= count; 2512 } 2513 2514 /* Now adjust the global symbols defined in this section. */ 2515 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) 2516 - symtab_hdr->sh_info); 2517 sym_hashes = elf_sym_hashes (abfd); 2518 end_hashes = sym_hashes + symcount; 2519 for (; sym_hashes < end_hashes; sym_hashes++) 2520 { 2521 struct elf_link_hash_entry *sym_hash = *sym_hashes; 2522 2523 if ((sym_hash->root.type == bfd_link_hash_defined 2524 || sym_hash->root.type == bfd_link_hash_defweak) 2525 && sym_hash->root.u.def.section == sec 2526 && sym_hash->root.u.def.value > addr 2527 && sym_hash->root.u.def.value < toaddr) 2528 { 2529 if (sym_hash->root.u.def.value < addr + count) 2530 sym_hash->root.u.def.value = addr; 2531 else 2532 sym_hash->root.u.def.value -= count; 2533 } 2534 /* Adjust the function symbol's size as well. */ 2535 else if (sym_hash->root.type == bfd_link_hash_defined 2536 && sym_hash->root.u.def.section == sec 2537 && sym_hash->type == STT_FUNC 2538 && sym_hash->root.u.def.value + sym_hash->size > addr 2539 && sym_hash->root.u.def.value + sym_hash->size < toaddr) 2540 sym_hash->size -= count; 2541 } 2542 2543 /* See if we can move the ALIGN reloc forward. 2544 We have adjusted r_offset for it already. */ 2545 if (irelalign != NULL) 2546 { 2547 bfd_vma alignto, alignaddr; 2548 2549 if ((int) irelalign->r_addend > 0) 2550 { 2551 /* This is the old address. */ 2552 alignto = BFD_ALIGN (toaddr, 1 << irelalign->r_addend); 2553 /* This is where the align points to now. */ 2554 alignaddr = BFD_ALIGN (irelalign->r_offset, 2555 1 << irelalign->r_addend); 2556 if (alignaddr < alignto) 2557 /* Tail recursion. */ 2558 return mn10300_elf_relax_delete_bytes (abfd, sec, alignaddr, 2559 (int) (alignto - alignaddr)); 2560 } 2561 } 2562 2563 return TRUE; 2564 } 2565 2566 /* Return TRUE if a symbol exists at the given address, else return 2567 FALSE. */ 2568 2569 static bfd_boolean 2570 mn10300_elf_symbol_address_p (bfd *abfd, 2571 asection *sec, 2572 Elf_Internal_Sym *isym, 2573 bfd_vma addr) 2574 { 2575 Elf_Internal_Shdr *symtab_hdr; 2576 unsigned int sec_shndx; 2577 Elf_Internal_Sym *isymend; 2578 struct elf_link_hash_entry **sym_hashes; 2579 struct elf_link_hash_entry **end_hashes; 2580 unsigned int symcount; 2581 2582 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); 2583 2584 /* Examine all the symbols. */ 2585 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 2586 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) 2587 if (isym->st_shndx == sec_shndx 2588 && isym->st_value == addr) 2589 return TRUE; 2590 2591 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) 2592 - symtab_hdr->sh_info); 2593 sym_hashes = elf_sym_hashes (abfd); 2594 end_hashes = sym_hashes + symcount; 2595 for (; sym_hashes < end_hashes; sym_hashes++) 2596 { 2597 struct elf_link_hash_entry *sym_hash = *sym_hashes; 2598 2599 if ((sym_hash->root.type == bfd_link_hash_defined 2600 || sym_hash->root.type == bfd_link_hash_defweak) 2601 && sym_hash->root.u.def.section == sec 2602 && sym_hash->root.u.def.value == addr) 2603 return TRUE; 2604 } 2605 2606 return FALSE; 2607 } 2608 2609 /* This function handles relaxing for the mn10300. 2610 2611 There are quite a few relaxing opportunities available on the mn10300: 2612 2613 * calls:32 -> calls:16 2 bytes 2614 * call:32 -> call:16 2 bytes 2615 2616 * call:32 -> calls:32 1 byte 2617 * call:16 -> calls:16 1 byte 2618 * These are done anytime using "calls" would result 2619 in smaller code, or when necessary to preserve the 2620 meaning of the program. 2621 2622 * call:32 varies 2623 * call:16 2624 * In some circumstances we can move instructions 2625 from a function prologue into a "call" instruction. 2626 This is only done if the resulting code is no larger 2627 than the original code. 2628 2629 * jmp:32 -> jmp:16 2 bytes 2630 * jmp:16 -> bra:8 1 byte 2631 2632 * If the previous instruction is a conditional branch 2633 around the jump/bra, we may be able to reverse its condition 2634 and change its target to the jump's target. The jump/bra 2635 can then be deleted. 2 bytes 2636 2637 * mov abs32 -> mov abs16 1 or 2 bytes 2638 2639 * Most instructions which accept imm32 can relax to imm16 1 or 2 bytes 2640 - Most instructions which accept imm16 can relax to imm8 1 or 2 bytes 2641 2642 * Most instructions which accept d32 can relax to d16 1 or 2 bytes 2643 - Most instructions which accept d16 can relax to d8 1 or 2 bytes 2644 2645 We don't handle imm16->imm8 or d16->d8 as they're very rare 2646 and somewhat more difficult to support. */ 2647 2648 static bfd_boolean 2649 mn10300_elf_relax_section (bfd *abfd, 2650 asection *sec, 2651 struct bfd_link_info *link_info, 2652 bfd_boolean *again) 2653 { 2654 Elf_Internal_Shdr *symtab_hdr; 2655 Elf_Internal_Rela *internal_relocs = NULL; 2656 Elf_Internal_Rela *irel, *irelend; 2657 bfd_byte *contents = NULL; 2658 Elf_Internal_Sym *isymbuf = NULL; 2659 struct elf32_mn10300_link_hash_table *hash_table; 2660 asection *section = sec; 2661 bfd_vma align_gap_adjustment; 2662 2663 if (link_info->relocatable) 2664 (*link_info->callbacks->einfo) 2665 (_("%P%F: --relax and -r may not be used together\n")); 2666 2667 /* Assume nothing changes. */ 2668 *again = FALSE; 2669 2670 /* We need a pointer to the mn10300 specific hash table. */ 2671 hash_table = elf32_mn10300_hash_table (link_info); 2672 if (hash_table == NULL) 2673 return FALSE; 2674 2675 /* Initialize fields in each hash table entry the first time through. */ 2676 if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0) 2677 { 2678 bfd *input_bfd; 2679 2680 /* Iterate over all the input bfds. */ 2681 for (input_bfd = link_info->input_bfds; 2682 input_bfd != NULL; 2683 input_bfd = input_bfd->link_next) 2684 { 2685 /* We're going to need all the symbols for each bfd. */ 2686 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 2687 if (symtab_hdr->sh_info != 0) 2688 { 2689 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 2690 if (isymbuf == NULL) 2691 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, 2692 symtab_hdr->sh_info, 0, 2693 NULL, NULL, NULL); 2694 if (isymbuf == NULL) 2695 goto error_return; 2696 } 2697 2698 /* Iterate over each section in this bfd. */ 2699 for (section = input_bfd->sections; 2700 section != NULL; 2701 section = section->next) 2702 { 2703 struct elf32_mn10300_link_hash_entry *hash; 2704 asection *sym_sec = NULL; 2705 const char *sym_name; 2706 char *new_name; 2707 2708 /* If there's nothing to do in this section, skip it. */ 2709 if (! ((section->flags & SEC_RELOC) != 0 2710 && section->reloc_count != 0)) 2711 continue; 2712 if ((section->flags & SEC_ALLOC) == 0) 2713 continue; 2714 2715 /* Get cached copy of section contents if it exists. */ 2716 if (elf_section_data (section)->this_hdr.contents != NULL) 2717 contents = elf_section_data (section)->this_hdr.contents; 2718 else if (section->size != 0) 2719 { 2720 /* Go get them off disk. */ 2721 if (!bfd_malloc_and_get_section (input_bfd, section, 2722 &contents)) 2723 goto error_return; 2724 } 2725 else 2726 contents = NULL; 2727 2728 /* If there aren't any relocs, then there's nothing to do. */ 2729 if ((section->flags & SEC_RELOC) != 0 2730 && section->reloc_count != 0) 2731 { 2732 /* Get a copy of the native relocations. */ 2733 internal_relocs = _bfd_elf_link_read_relocs (input_bfd, section, 2734 NULL, NULL, 2735 link_info->keep_memory); 2736 if (internal_relocs == NULL) 2737 goto error_return; 2738 2739 /* Now examine each relocation. */ 2740 irel = internal_relocs; 2741 irelend = irel + section->reloc_count; 2742 for (; irel < irelend; irel++) 2743 { 2744 long r_type; 2745 unsigned long r_index; 2746 unsigned char code; 2747 2748 r_type = ELF32_R_TYPE (irel->r_info); 2749 r_index = ELF32_R_SYM (irel->r_info); 2750 2751 if (r_type < 0 || r_type >= (int) R_MN10300_MAX) 2752 goto error_return; 2753 2754 /* We need the name and hash table entry of the target 2755 symbol! */ 2756 hash = NULL; 2757 sym_sec = NULL; 2758 2759 if (r_index < symtab_hdr->sh_info) 2760 { 2761 /* A local symbol. */ 2762 Elf_Internal_Sym *isym; 2763 struct elf_link_hash_table *elftab; 2764 bfd_size_type amt; 2765 2766 isym = isymbuf + r_index; 2767 if (isym->st_shndx == SHN_UNDEF) 2768 sym_sec = bfd_und_section_ptr; 2769 else if (isym->st_shndx == SHN_ABS) 2770 sym_sec = bfd_abs_section_ptr; 2771 else if (isym->st_shndx == SHN_COMMON) 2772 sym_sec = bfd_com_section_ptr; 2773 else 2774 sym_sec 2775 = bfd_section_from_elf_index (input_bfd, 2776 isym->st_shndx); 2777 2778 sym_name 2779 = bfd_elf_string_from_elf_section (input_bfd, 2780 (symtab_hdr 2781 ->sh_link), 2782 isym->st_name); 2783 2784 /* If it isn't a function, then we don't care 2785 about it. */ 2786 if (ELF_ST_TYPE (isym->st_info) != STT_FUNC) 2787 continue; 2788 2789 /* Tack on an ID so we can uniquely identify this 2790 local symbol in the global hash table. */ 2791 amt = strlen (sym_name) + 10; 2792 new_name = bfd_malloc (amt); 2793 if (new_name == NULL) 2794 goto error_return; 2795 2796 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id); 2797 sym_name = new_name; 2798 2799 elftab = &hash_table->static_hash_table->root; 2800 hash = ((struct elf32_mn10300_link_hash_entry *) 2801 elf_link_hash_lookup (elftab, sym_name, 2802 TRUE, TRUE, FALSE)); 2803 free (new_name); 2804 } 2805 else 2806 { 2807 r_index -= symtab_hdr->sh_info; 2808 hash = (struct elf32_mn10300_link_hash_entry *) 2809 elf_sym_hashes (input_bfd)[r_index]; 2810 } 2811 2812 sym_name = hash->root.root.root.string; 2813 if ((section->flags & SEC_CODE) != 0) 2814 { 2815 /* If this is not a "call" instruction, then we 2816 should convert "call" instructions to "calls" 2817 instructions. */ 2818 code = bfd_get_8 (input_bfd, 2819 contents + irel->r_offset - 1); 2820 if (code != 0xdd && code != 0xcd) 2821 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS; 2822 } 2823 2824 /* If this is a jump/call, then bump the 2825 direct_calls counter. Else force "call" to 2826 "calls" conversions. */ 2827 if (r_type == R_MN10300_PCREL32 2828 || r_type == R_MN10300_PLT32 2829 || r_type == R_MN10300_PLT16 2830 || r_type == R_MN10300_PCREL16) 2831 hash->direct_calls++; 2832 else 2833 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS; 2834 } 2835 } 2836 2837 /* Now look at the actual contents to get the stack size, 2838 and a list of what registers were saved in the prologue 2839 (ie movm_args). */ 2840 if ((section->flags & SEC_CODE) != 0) 2841 { 2842 Elf_Internal_Sym *isym, *isymend; 2843 unsigned int sec_shndx; 2844 struct elf_link_hash_entry **hashes; 2845 struct elf_link_hash_entry **end_hashes; 2846 unsigned int symcount; 2847 2848 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd, 2849 section); 2850 2851 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) 2852 - symtab_hdr->sh_info); 2853 hashes = elf_sym_hashes (input_bfd); 2854 end_hashes = hashes + symcount; 2855 2856 /* Look at each function defined in this section and 2857 update info for that function. */ 2858 isymend = isymbuf + symtab_hdr->sh_info; 2859 for (isym = isymbuf; isym < isymend; isym++) 2860 { 2861 if (isym->st_shndx == sec_shndx 2862 && ELF_ST_TYPE (isym->st_info) == STT_FUNC) 2863 { 2864 struct elf_link_hash_table *elftab; 2865 bfd_size_type amt; 2866 struct elf_link_hash_entry **lhashes = hashes; 2867 2868 /* Skip a local symbol if it aliases a 2869 global one. */ 2870 for (; lhashes < end_hashes; lhashes++) 2871 { 2872 hash = (struct elf32_mn10300_link_hash_entry *) *lhashes; 2873 if ((hash->root.root.type == bfd_link_hash_defined 2874 || hash->root.root.type == bfd_link_hash_defweak) 2875 && hash->root.root.u.def.section == section 2876 && hash->root.type == STT_FUNC 2877 && hash->root.root.u.def.value == isym->st_value) 2878 break; 2879 } 2880 if (lhashes != end_hashes) 2881 continue; 2882 2883 if (isym->st_shndx == SHN_UNDEF) 2884 sym_sec = bfd_und_section_ptr; 2885 else if (isym->st_shndx == SHN_ABS) 2886 sym_sec = bfd_abs_section_ptr; 2887 else if (isym->st_shndx == SHN_COMMON) 2888 sym_sec = bfd_com_section_ptr; 2889 else 2890 sym_sec 2891 = bfd_section_from_elf_index (input_bfd, 2892 isym->st_shndx); 2893 2894 sym_name = (bfd_elf_string_from_elf_section 2895 (input_bfd, symtab_hdr->sh_link, 2896 isym->st_name)); 2897 2898 /* Tack on an ID so we can uniquely identify this 2899 local symbol in the global hash table. */ 2900 amt = strlen (sym_name) + 10; 2901 new_name = bfd_malloc (amt); 2902 if (new_name == NULL) 2903 goto error_return; 2904 2905 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id); 2906 sym_name = new_name; 2907 2908 elftab = &hash_table->static_hash_table->root; 2909 hash = ((struct elf32_mn10300_link_hash_entry *) 2910 elf_link_hash_lookup (elftab, sym_name, 2911 TRUE, TRUE, FALSE)); 2912 free (new_name); 2913 compute_function_info (input_bfd, hash, 2914 isym->st_value, contents); 2915 hash->value = isym->st_value; 2916 } 2917 } 2918 2919 for (; hashes < end_hashes; hashes++) 2920 { 2921 hash = (struct elf32_mn10300_link_hash_entry *) *hashes; 2922 if ((hash->root.root.type == bfd_link_hash_defined 2923 || hash->root.root.type == bfd_link_hash_defweak) 2924 && hash->root.root.u.def.section == section 2925 && hash->root.type == STT_FUNC) 2926 compute_function_info (input_bfd, hash, 2927 (hash)->root.root.u.def.value, 2928 contents); 2929 } 2930 } 2931 2932 /* Cache or free any memory we allocated for the relocs. */ 2933 if (internal_relocs != NULL 2934 && elf_section_data (section)->relocs != internal_relocs) 2935 free (internal_relocs); 2936 internal_relocs = NULL; 2937 2938 /* Cache or free any memory we allocated for the contents. */ 2939 if (contents != NULL 2940 && elf_section_data (section)->this_hdr.contents != contents) 2941 { 2942 if (! link_info->keep_memory) 2943 free (contents); 2944 else 2945 { 2946 /* Cache the section contents for elf_link_input_bfd. */ 2947 elf_section_data (section)->this_hdr.contents = contents; 2948 } 2949 } 2950 contents = NULL; 2951 } 2952 2953 /* Cache or free any memory we allocated for the symbols. */ 2954 if (isymbuf != NULL 2955 && symtab_hdr->contents != (unsigned char *) isymbuf) 2956 { 2957 if (! link_info->keep_memory) 2958 free (isymbuf); 2959 else 2960 { 2961 /* Cache the symbols for elf_link_input_bfd. */ 2962 symtab_hdr->contents = (unsigned char *) isymbuf; 2963 } 2964 } 2965 isymbuf = NULL; 2966 } 2967 2968 /* Now iterate on each symbol in the hash table and perform 2969 the final initialization steps on each. */ 2970 elf32_mn10300_link_hash_traverse (hash_table, 2971 elf32_mn10300_finish_hash_table_entry, 2972 link_info); 2973 elf32_mn10300_link_hash_traverse (hash_table->static_hash_table, 2974 elf32_mn10300_finish_hash_table_entry, 2975 link_info); 2976 2977 { 2978 /* This section of code collects all our local symbols, sorts 2979 them by value, and looks for multiple symbols referring to 2980 the same address. For those symbols, the flags are merged. 2981 At this point, the only flag that can be set is 2982 MN10300_CONVERT_CALL_TO_CALLS, so we simply OR the flags 2983 together. */ 2984 int static_count = 0, i; 2985 struct elf32_mn10300_link_hash_entry **entries; 2986 struct elf32_mn10300_link_hash_entry **ptr; 2987 2988 elf32_mn10300_link_hash_traverse (hash_table->static_hash_table, 2989 elf32_mn10300_count_hash_table_entries, 2990 &static_count); 2991 2992 entries = bfd_malloc (static_count * sizeof (* ptr)); 2993 2994 ptr = entries; 2995 elf32_mn10300_link_hash_traverse (hash_table->static_hash_table, 2996 elf32_mn10300_list_hash_table_entries, 2997 & ptr); 2998 2999 qsort (entries, static_count, sizeof (entries[0]), sort_by_value); 3000 3001 for (i = 0; i < static_count - 1; i++) 3002 if (entries[i]->value && entries[i]->value == entries[i+1]->value) 3003 { 3004 int v = entries[i]->flags; 3005 int j; 3006 3007 for (j = i + 1; j < static_count && entries[j]->value == entries[i]->value; j++) 3008 v |= entries[j]->flags; 3009 3010 for (j = i; j < static_count && entries[j]->value == entries[i]->value; j++) 3011 entries[j]->flags = v; 3012 3013 i = j - 1; 3014 } 3015 } 3016 3017 /* All entries in the hash table are fully initialized. */ 3018 hash_table->flags |= MN10300_HASH_ENTRIES_INITIALIZED; 3019 3020 /* Now that everything has been initialized, go through each 3021 code section and delete any prologue insns which will be 3022 redundant because their operations will be performed by 3023 a "call" instruction. */ 3024 for (input_bfd = link_info->input_bfds; 3025 input_bfd != NULL; 3026 input_bfd = input_bfd->link_next) 3027 { 3028 /* We're going to need all the local symbols for each bfd. */ 3029 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 3030 if (symtab_hdr->sh_info != 0) 3031 { 3032 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 3033 if (isymbuf == NULL) 3034 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, 3035 symtab_hdr->sh_info, 0, 3036 NULL, NULL, NULL); 3037 if (isymbuf == NULL) 3038 goto error_return; 3039 } 3040 3041 /* Walk over each section in this bfd. */ 3042 for (section = input_bfd->sections; 3043 section != NULL; 3044 section = section->next) 3045 { 3046 unsigned int sec_shndx; 3047 Elf_Internal_Sym *isym, *isymend; 3048 struct elf_link_hash_entry **hashes; 3049 struct elf_link_hash_entry **end_hashes; 3050 unsigned int symcount; 3051 3052 /* Skip non-code sections and empty sections. */ 3053 if ((section->flags & SEC_CODE) == 0 || section->size == 0) 3054 continue; 3055 3056 if (section->reloc_count != 0) 3057 { 3058 /* Get a copy of the native relocations. */ 3059 internal_relocs = _bfd_elf_link_read_relocs (input_bfd, section, 3060 NULL, NULL, 3061 link_info->keep_memory); 3062 if (internal_relocs == NULL) 3063 goto error_return; 3064 } 3065 3066 /* Get cached copy of section contents if it exists. */ 3067 if (elf_section_data (section)->this_hdr.contents != NULL) 3068 contents = elf_section_data (section)->this_hdr.contents; 3069 else 3070 { 3071 /* Go get them off disk. */ 3072 if (!bfd_malloc_and_get_section (input_bfd, section, 3073 &contents)) 3074 goto error_return; 3075 } 3076 3077 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd, 3078 section); 3079 3080 /* Now look for any function in this section which needs 3081 insns deleted from its prologue. */ 3082 isymend = isymbuf + symtab_hdr->sh_info; 3083 for (isym = isymbuf; isym < isymend; isym++) 3084 { 3085 struct elf32_mn10300_link_hash_entry *sym_hash; 3086 asection *sym_sec = NULL; 3087 const char *sym_name; 3088 char *new_name; 3089 struct elf_link_hash_table *elftab; 3090 bfd_size_type amt; 3091 3092 if (isym->st_shndx != sec_shndx) 3093 continue; 3094 3095 if (isym->st_shndx == SHN_UNDEF) 3096 sym_sec = bfd_und_section_ptr; 3097 else if (isym->st_shndx == SHN_ABS) 3098 sym_sec = bfd_abs_section_ptr; 3099 else if (isym->st_shndx == SHN_COMMON) 3100 sym_sec = bfd_com_section_ptr; 3101 else 3102 sym_sec 3103 = bfd_section_from_elf_index (input_bfd, isym->st_shndx); 3104 3105 sym_name 3106 = bfd_elf_string_from_elf_section (input_bfd, 3107 symtab_hdr->sh_link, 3108 isym->st_name); 3109 3110 /* Tack on an ID so we can uniquely identify this 3111 local symbol in the global hash table. */ 3112 amt = strlen (sym_name) + 10; 3113 new_name = bfd_malloc (amt); 3114 if (new_name == NULL) 3115 goto error_return; 3116 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id); 3117 sym_name = new_name; 3118 3119 elftab = & hash_table->static_hash_table->root; 3120 sym_hash = (struct elf32_mn10300_link_hash_entry *) 3121 elf_link_hash_lookup (elftab, sym_name, 3122 FALSE, FALSE, FALSE); 3123 3124 free (new_name); 3125 if (sym_hash == NULL) 3126 continue; 3127 3128 if (! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS) 3129 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES)) 3130 { 3131 int bytes = 0; 3132 3133 /* Note that we've changed things. */ 3134 elf_section_data (section)->relocs = internal_relocs; 3135 elf_section_data (section)->this_hdr.contents = contents; 3136 symtab_hdr->contents = (unsigned char *) isymbuf; 3137 3138 /* Count how many bytes we're going to delete. */ 3139 if (sym_hash->movm_args) 3140 bytes += 2; 3141 3142 if (sym_hash->stack_size > 0) 3143 { 3144 if (sym_hash->stack_size <= 128) 3145 bytes += 3; 3146 else 3147 bytes += 4; 3148 } 3149 3150 /* Note that we've deleted prologue bytes for this 3151 function. */ 3152 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES; 3153 3154 /* Actually delete the bytes. */ 3155 if (!mn10300_elf_relax_delete_bytes (input_bfd, 3156 section, 3157 isym->st_value, 3158 bytes)) 3159 goto error_return; 3160 3161 /* Something changed. Not strictly necessary, but 3162 may lead to more relaxing opportunities. */ 3163 *again = TRUE; 3164 } 3165 } 3166 3167 /* Look for any global functions in this section which 3168 need insns deleted from their prologues. */ 3169 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) 3170 - symtab_hdr->sh_info); 3171 hashes = elf_sym_hashes (input_bfd); 3172 end_hashes = hashes + symcount; 3173 for (; hashes < end_hashes; hashes++) 3174 { 3175 struct elf32_mn10300_link_hash_entry *sym_hash; 3176 3177 sym_hash = (struct elf32_mn10300_link_hash_entry *) *hashes; 3178 if ((sym_hash->root.root.type == bfd_link_hash_defined 3179 || sym_hash->root.root.type == bfd_link_hash_defweak) 3180 && sym_hash->root.root.u.def.section == section 3181 && ! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS) 3182 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES)) 3183 { 3184 int bytes = 0; 3185 bfd_vma symval; 3186 struct elf_link_hash_entry **hh; 3187 3188 /* Note that we've changed things. */ 3189 elf_section_data (section)->relocs = internal_relocs; 3190 elf_section_data (section)->this_hdr.contents = contents; 3191 symtab_hdr->contents = (unsigned char *) isymbuf; 3192 3193 /* Count how many bytes we're going to delete. */ 3194 if (sym_hash->movm_args) 3195 bytes += 2; 3196 3197 if (sym_hash->stack_size > 0) 3198 { 3199 if (sym_hash->stack_size <= 128) 3200 bytes += 3; 3201 else 3202 bytes += 4; 3203 } 3204 3205 /* Note that we've deleted prologue bytes for this 3206 function. */ 3207 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES; 3208 3209 /* Actually delete the bytes. */ 3210 symval = sym_hash->root.root.u.def.value; 3211 if (!mn10300_elf_relax_delete_bytes (input_bfd, 3212 section, 3213 symval, 3214 bytes)) 3215 goto error_return; 3216 3217 /* There may be other C++ functions symbols with the same 3218 address. If so then mark these as having had their 3219 prologue bytes deleted as well. */ 3220 for (hh = elf_sym_hashes (input_bfd); hh < end_hashes; hh++) 3221 { 3222 struct elf32_mn10300_link_hash_entry *h; 3223 3224 h = (struct elf32_mn10300_link_hash_entry *) * hh; 3225 3226 if (h != sym_hash 3227 && (h->root.root.type == bfd_link_hash_defined 3228 || h->root.root.type == bfd_link_hash_defweak) 3229 && h->root.root.u.def.section == section 3230 && ! (h->flags & MN10300_CONVERT_CALL_TO_CALLS) 3231 && h->root.root.u.def.value == symval 3232 && h->root.type == STT_FUNC) 3233 h->flags |= MN10300_DELETED_PROLOGUE_BYTES; 3234 } 3235 3236 /* Something changed. Not strictly necessary, but 3237 may lead to more relaxing opportunities. */ 3238 *again = TRUE; 3239 } 3240 } 3241 3242 /* Cache or free any memory we allocated for the relocs. */ 3243 if (internal_relocs != NULL 3244 && elf_section_data (section)->relocs != internal_relocs) 3245 free (internal_relocs); 3246 internal_relocs = NULL; 3247 3248 /* Cache or free any memory we allocated for the contents. */ 3249 if (contents != NULL 3250 && elf_section_data (section)->this_hdr.contents != contents) 3251 { 3252 if (! link_info->keep_memory) 3253 free (contents); 3254 else 3255 /* Cache the section contents for elf_link_input_bfd. */ 3256 elf_section_data (section)->this_hdr.contents = contents; 3257 } 3258 contents = NULL; 3259 } 3260 3261 /* Cache or free any memory we allocated for the symbols. */ 3262 if (isymbuf != NULL 3263 && symtab_hdr->contents != (unsigned char *) isymbuf) 3264 { 3265 if (! link_info->keep_memory) 3266 free (isymbuf); 3267 else 3268 /* Cache the symbols for elf_link_input_bfd. */ 3269 symtab_hdr->contents = (unsigned char *) isymbuf; 3270 } 3271 isymbuf = NULL; 3272 } 3273 } 3274 3275 /* (Re)initialize for the basic instruction shortening/relaxing pass. */ 3276 contents = NULL; 3277 internal_relocs = NULL; 3278 isymbuf = NULL; 3279 /* For error_return. */ 3280 section = sec; 3281 3282 /* We don't have to do anything for a relocatable link, if 3283 this section does not have relocs, or if this is not a 3284 code section. */ 3285 if (link_info->relocatable 3286 || (sec->flags & SEC_RELOC) == 0 3287 || sec->reloc_count == 0 3288 || (sec->flags & SEC_CODE) == 0) 3289 return TRUE; 3290 3291 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 3292 3293 /* Get a copy of the native relocations. */ 3294 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, 3295 link_info->keep_memory); 3296 if (internal_relocs == NULL) 3297 goto error_return; 3298 3299 /* Scan for worst case alignment gap changes. Note that this logic 3300 is not ideal; what we should do is run this scan for every 3301 opcode/address range and adjust accordingly, but that's 3302 expensive. Worst case is that for an alignment of N bytes, we 3303 move by 2*N-N-1 bytes, assuming we have aligns of 1, 2, 4, 8, etc 3304 all before it. Plus, this still doesn't cover cross-section 3305 jumps with section alignment. */ 3306 irelend = internal_relocs + sec->reloc_count; 3307 align_gap_adjustment = 0; 3308 for (irel = internal_relocs; irel < irelend; irel++) 3309 { 3310 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_ALIGN) 3311 { 3312 bfd_vma adj = 1 << irel->r_addend; 3313 bfd_vma aend = irel->r_offset; 3314 3315 aend = BFD_ALIGN (aend, 1 << irel->r_addend); 3316 adj = 2 * adj - adj - 1; 3317 3318 /* Record the biggest adjustmnet. Skip any alignment at the 3319 end of our section. */ 3320 if (align_gap_adjustment < adj 3321 && aend < sec->output_section->vma + sec->output_offset + sec->size) 3322 align_gap_adjustment = adj; 3323 } 3324 } 3325 3326 /* Walk through them looking for relaxing opportunities. */ 3327 irelend = internal_relocs + sec->reloc_count; 3328 for (irel = internal_relocs; irel < irelend; irel++) 3329 { 3330 bfd_vma symval; 3331 bfd_signed_vma jump_offset; 3332 asection *sym_sec = NULL; 3333 struct elf32_mn10300_link_hash_entry *h = NULL; 3334 3335 /* If this isn't something that can be relaxed, then ignore 3336 this reloc. */ 3337 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_NONE 3338 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_8 3339 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_MAX) 3340 continue; 3341 3342 /* Get the section contents if we haven't done so already. */ 3343 if (contents == NULL) 3344 { 3345 /* Get cached copy if it exists. */ 3346 if (elf_section_data (sec)->this_hdr.contents != NULL) 3347 contents = elf_section_data (sec)->this_hdr.contents; 3348 else 3349 { 3350 /* Go get them off disk. */ 3351 if (!bfd_malloc_and_get_section (abfd, sec, &contents)) 3352 goto error_return; 3353 } 3354 } 3355 3356 /* Read this BFD's symbols if we haven't done so already. */ 3357 if (isymbuf == NULL && symtab_hdr->sh_info != 0) 3358 { 3359 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 3360 if (isymbuf == NULL) 3361 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 3362 symtab_hdr->sh_info, 0, 3363 NULL, NULL, NULL); 3364 if (isymbuf == NULL) 3365 goto error_return; 3366 } 3367 3368 /* Get the value of the symbol referred to by the reloc. */ 3369 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 3370 { 3371 Elf_Internal_Sym *isym; 3372 const char *sym_name; 3373 char *new_name; 3374 3375 /* A local symbol. */ 3376 isym = isymbuf + ELF32_R_SYM (irel->r_info); 3377 if (isym->st_shndx == SHN_UNDEF) 3378 sym_sec = bfd_und_section_ptr; 3379 else if (isym->st_shndx == SHN_ABS) 3380 sym_sec = bfd_abs_section_ptr; 3381 else if (isym->st_shndx == SHN_COMMON) 3382 sym_sec = bfd_com_section_ptr; 3383 else 3384 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); 3385 3386 sym_name = bfd_elf_string_from_elf_section (abfd, 3387 symtab_hdr->sh_link, 3388 isym->st_name); 3389 3390 if ((sym_sec->flags & SEC_MERGE) 3391 && sym_sec->sec_info_type == SEC_INFO_TYPE_MERGE) 3392 { 3393 symval = isym->st_value; 3394 3395 /* GAS may reduce relocations against symbols in SEC_MERGE 3396 sections to a relocation against the section symbol when 3397 the original addend was zero. When the reloc is against 3398 a section symbol we should include the addend in the 3399 offset passed to _bfd_merged_section_offset, since the 3400 location of interest is the original symbol. On the 3401 other hand, an access to "sym+addend" where "sym" is not 3402 a section symbol should not include the addend; Such an 3403 access is presumed to be an offset from "sym"; The 3404 location of interest is just "sym". */ 3405 if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) 3406 symval += irel->r_addend; 3407 3408 symval = _bfd_merged_section_offset (abfd, & sym_sec, 3409 elf_section_data (sym_sec)->sec_info, 3410 symval); 3411 3412 if (ELF_ST_TYPE (isym->st_info) != STT_SECTION) 3413 symval += irel->r_addend; 3414 3415 symval += sym_sec->output_section->vma 3416 + sym_sec->output_offset - irel->r_addend; 3417 } 3418 else 3419 symval = (isym->st_value 3420 + sym_sec->output_section->vma 3421 + sym_sec->output_offset); 3422 3423 /* Tack on an ID so we can uniquely identify this 3424 local symbol in the global hash table. */ 3425 new_name = bfd_malloc ((bfd_size_type) strlen (sym_name) + 10); 3426 if (new_name == NULL) 3427 goto error_return; 3428 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id); 3429 sym_name = new_name; 3430 3431 h = (struct elf32_mn10300_link_hash_entry *) 3432 elf_link_hash_lookup (&hash_table->static_hash_table->root, 3433 sym_name, FALSE, FALSE, FALSE); 3434 free (new_name); 3435 } 3436 else 3437 { 3438 unsigned long indx; 3439 3440 /* An external symbol. */ 3441 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 3442 h = (struct elf32_mn10300_link_hash_entry *) 3443 (elf_sym_hashes (abfd)[indx]); 3444 BFD_ASSERT (h != NULL); 3445 if (h->root.root.type != bfd_link_hash_defined 3446 && h->root.root.type != bfd_link_hash_defweak) 3447 /* This appears to be a reference to an undefined 3448 symbol. Just ignore it--it will be caught by the 3449 regular reloc processing. */ 3450 continue; 3451 3452 /* Check for a reference to a discarded symbol and ignore it. */ 3453 if (h->root.root.u.def.section->output_section == NULL) 3454 continue; 3455 3456 sym_sec = h->root.root.u.def.section->output_section; 3457 3458 symval = (h->root.root.u.def.value 3459 + h->root.root.u.def.section->output_section->vma 3460 + h->root.root.u.def.section->output_offset); 3461 } 3462 3463 /* For simplicity of coding, we are going to modify the section 3464 contents, the section relocs, and the BFD symbol table. We 3465 must tell the rest of the code not to free up this 3466 information. It would be possible to instead create a table 3467 of changes which have to be made, as is done in coff-mips.c; 3468 that would be more work, but would require less memory when 3469 the linker is run. */ 3470 3471 /* Try to turn a 32bit pc-relative branch/call into a 16bit pc-relative 3472 branch/call, also deal with "call" -> "calls" conversions and 3473 insertion of prologue data into "call" instructions. */ 3474 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL32 3475 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32) 3476 { 3477 bfd_vma value = symval; 3478 3479 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32 3480 && h != NULL 3481 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL 3482 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN 3483 && h->root.plt.offset != (bfd_vma) -1) 3484 { 3485 asection * splt; 3486 3487 splt = hash_table->root.splt; 3488 value = ((splt->output_section->vma 3489 + splt->output_offset 3490 + h->root.plt.offset) 3491 - (sec->output_section->vma 3492 + sec->output_offset 3493 + irel->r_offset)); 3494 } 3495 3496 /* If we've got a "call" instruction that needs to be turned 3497 into a "calls" instruction, do so now. It saves a byte. */ 3498 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS)) 3499 { 3500 unsigned char code; 3501 3502 /* Get the opcode. */ 3503 code = bfd_get_8 (abfd, contents + irel->r_offset - 1); 3504 3505 /* Make sure we're working with a "call" instruction! */ 3506 if (code == 0xdd) 3507 { 3508 /* Note that we've changed the relocs, section contents, 3509 etc. */ 3510 elf_section_data (sec)->relocs = internal_relocs; 3511 elf_section_data (sec)->this_hdr.contents = contents; 3512 symtab_hdr->contents = (unsigned char *) isymbuf; 3513 3514 /* Fix the opcode. */ 3515 bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 1); 3516 bfd_put_8 (abfd, 0xff, contents + irel->r_offset); 3517 3518 /* Fix irel->r_offset and irel->r_addend. */ 3519 irel->r_offset += 1; 3520 irel->r_addend += 1; 3521 3522 /* Delete one byte of data. */ 3523 if (!mn10300_elf_relax_delete_bytes (abfd, sec, 3524 irel->r_offset + 3, 1)) 3525 goto error_return; 3526 3527 /* That will change things, so, we should relax again. 3528 Note that this is not required, and it may be slow. */ 3529 *again = TRUE; 3530 } 3531 } 3532 else if (h) 3533 { 3534 /* We've got a "call" instruction which needs some data 3535 from target function filled in. */ 3536 unsigned char code; 3537 3538 /* Get the opcode. */ 3539 code = bfd_get_8 (abfd, contents + irel->r_offset - 1); 3540 3541 /* Insert data from the target function into the "call" 3542 instruction if needed. */ 3543 if (code == 0xdd) 3544 { 3545 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4); 3546 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size, 3547 contents + irel->r_offset + 5); 3548 } 3549 } 3550 3551 /* Deal with pc-relative gunk. */ 3552 value -= (sec->output_section->vma + sec->output_offset); 3553 value -= irel->r_offset; 3554 value += irel->r_addend; 3555 3556 /* See if the value will fit in 16 bits, note the high value is 3557 0x7fff + 2 as the target will be two bytes closer if we are 3558 able to relax, if it's in the same section. */ 3559 if (sec->output_section == sym_sec->output_section) 3560 jump_offset = 0x8001; 3561 else 3562 jump_offset = 0x7fff; 3563 3564 /* Account for jumps across alignment boundaries using 3565 align_gap_adjustment. */ 3566 if ((bfd_signed_vma) value < jump_offset - (bfd_signed_vma) align_gap_adjustment 3567 && ((bfd_signed_vma) value > -0x8000 + (bfd_signed_vma) align_gap_adjustment)) 3568 { 3569 unsigned char code; 3570 3571 /* Get the opcode. */ 3572 code = bfd_get_8 (abfd, contents + irel->r_offset - 1); 3573 3574 if (code != 0xdc && code != 0xdd && code != 0xff) 3575 continue; 3576 3577 /* Note that we've changed the relocs, section contents, etc. */ 3578 elf_section_data (sec)->relocs = internal_relocs; 3579 elf_section_data (sec)->this_hdr.contents = contents; 3580 symtab_hdr->contents = (unsigned char *) isymbuf; 3581 3582 /* Fix the opcode. */ 3583 if (code == 0xdc) 3584 bfd_put_8 (abfd, 0xcc, contents + irel->r_offset - 1); 3585 else if (code == 0xdd) 3586 bfd_put_8 (abfd, 0xcd, contents + irel->r_offset - 1); 3587 else if (code == 0xff) 3588 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); 3589 3590 /* Fix the relocation's type. */ 3591 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 3592 (ELF32_R_TYPE (irel->r_info) 3593 == (int) R_MN10300_PLT32) 3594 ? R_MN10300_PLT16 : 3595 R_MN10300_PCREL16); 3596 3597 /* Delete two bytes of data. */ 3598 if (!mn10300_elf_relax_delete_bytes (abfd, sec, 3599 irel->r_offset + 1, 2)) 3600 goto error_return; 3601 3602 /* That will change things, so, we should relax again. 3603 Note that this is not required, and it may be slow. */ 3604 *again = TRUE; 3605 } 3606 } 3607 3608 /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative 3609 branch. */ 3610 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL16) 3611 { 3612 bfd_vma value = symval; 3613 3614 /* If we've got a "call" instruction that needs to be turned 3615 into a "calls" instruction, do so now. It saves a byte. */ 3616 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS)) 3617 { 3618 unsigned char code; 3619 3620 /* Get the opcode. */ 3621 code = bfd_get_8 (abfd, contents + irel->r_offset - 1); 3622 3623 /* Make sure we're working with a "call" instruction! */ 3624 if (code == 0xcd) 3625 { 3626 /* Note that we've changed the relocs, section contents, 3627 etc. */ 3628 elf_section_data (sec)->relocs = internal_relocs; 3629 elf_section_data (sec)->this_hdr.contents = contents; 3630 symtab_hdr->contents = (unsigned char *) isymbuf; 3631 3632 /* Fix the opcode. */ 3633 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 1); 3634 bfd_put_8 (abfd, 0xff, contents + irel->r_offset); 3635 3636 /* Fix irel->r_offset and irel->r_addend. */ 3637 irel->r_offset += 1; 3638 irel->r_addend += 1; 3639 3640 /* Delete one byte of data. */ 3641 if (!mn10300_elf_relax_delete_bytes (abfd, sec, 3642 irel->r_offset + 1, 1)) 3643 goto error_return; 3644 3645 /* That will change things, so, we should relax again. 3646 Note that this is not required, and it may be slow. */ 3647 *again = TRUE; 3648 } 3649 } 3650 else if (h) 3651 { 3652 unsigned char code; 3653 3654 /* Get the opcode. */ 3655 code = bfd_get_8 (abfd, contents + irel->r_offset - 1); 3656 3657 /* Insert data from the target function into the "call" 3658 instruction if needed. */ 3659 if (code == 0xcd) 3660 { 3661 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2); 3662 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size, 3663 contents + irel->r_offset + 3); 3664 } 3665 } 3666 3667 /* Deal with pc-relative gunk. */ 3668 value -= (sec->output_section->vma + sec->output_offset); 3669 value -= irel->r_offset; 3670 value += irel->r_addend; 3671 3672 /* See if the value will fit in 8 bits, note the high value is 3673 0x7f + 1 as the target will be one bytes closer if we are 3674 able to relax. */ 3675 if ((long) value < 0x80 && (long) value > -0x80) 3676 { 3677 unsigned char code; 3678 3679 /* Get the opcode. */ 3680 code = bfd_get_8 (abfd, contents + irel->r_offset - 1); 3681 3682 if (code != 0xcc) 3683 continue; 3684 3685 /* Note that we've changed the relocs, section contents, etc. */ 3686 elf_section_data (sec)->relocs = internal_relocs; 3687 elf_section_data (sec)->this_hdr.contents = contents; 3688 symtab_hdr->contents = (unsigned char *) isymbuf; 3689 3690 /* Fix the opcode. */ 3691 bfd_put_8 (abfd, 0xca, contents + irel->r_offset - 1); 3692 3693 /* Fix the relocation's type. */ 3694 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 3695 R_MN10300_PCREL8); 3696 3697 /* Delete one byte of data. */ 3698 if (!mn10300_elf_relax_delete_bytes (abfd, sec, 3699 irel->r_offset + 1, 1)) 3700 goto error_return; 3701 3702 /* That will change things, so, we should relax again. 3703 Note that this is not required, and it may be slow. */ 3704 *again = TRUE; 3705 } 3706 } 3707 3708 /* Try to eliminate an unconditional 8 bit pc-relative branch 3709 which immediately follows a conditional 8 bit pc-relative 3710 branch around the unconditional branch. 3711 3712 original: new: 3713 bCC lab1 bCC' lab2 3714 bra lab2 3715 lab1: lab1: 3716 3717 This happens when the bCC can't reach lab2 at assembly time, 3718 but due to other relaxations it can reach at link time. */ 3719 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL8) 3720 { 3721 Elf_Internal_Rela *nrel; 3722 bfd_vma value = symval; 3723 unsigned char code; 3724 3725 /* Deal with pc-relative gunk. */ 3726 value -= (sec->output_section->vma + sec->output_offset); 3727 value -= irel->r_offset; 3728 value += irel->r_addend; 3729 3730 /* Do nothing if this reloc is the last byte in the section. */ 3731 if (irel->r_offset == sec->size) 3732 continue; 3733 3734 /* See if the next instruction is an unconditional pc-relative 3735 branch, more often than not this test will fail, so we 3736 test it first to speed things up. */ 3737 code = bfd_get_8 (abfd, contents + irel->r_offset + 1); 3738 if (code != 0xca) 3739 continue; 3740 3741 /* Also make sure the next relocation applies to the next 3742 instruction and that it's a pc-relative 8 bit branch. */ 3743 nrel = irel + 1; 3744 if (nrel == irelend 3745 || irel->r_offset + 2 != nrel->r_offset 3746 || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10300_PCREL8) 3747 continue; 3748 3749 /* Make sure our destination immediately follows the 3750 unconditional branch. */ 3751 if (symval != (sec->output_section->vma + sec->output_offset 3752 + irel->r_offset + 3)) 3753 continue; 3754 3755 /* Now make sure we are a conditional branch. This may not 3756 be necessary, but why take the chance. 3757 3758 Note these checks assume that R_MN10300_PCREL8 relocs 3759 only occur on bCC and bCCx insns. If they occured 3760 elsewhere, we'd need to know the start of this insn 3761 for this check to be accurate. */ 3762 code = bfd_get_8 (abfd, contents + irel->r_offset - 1); 3763 if (code != 0xc0 && code != 0xc1 && code != 0xc2 3764 && code != 0xc3 && code != 0xc4 && code != 0xc5 3765 && code != 0xc6 && code != 0xc7 && code != 0xc8 3766 && code != 0xc9 && code != 0xe8 && code != 0xe9 3767 && code != 0xea && code != 0xeb) 3768 continue; 3769 3770 /* We also have to be sure there is no symbol/label 3771 at the unconditional branch. */ 3772 if (mn10300_elf_symbol_address_p (abfd, sec, isymbuf, 3773 irel->r_offset + 1)) 3774 continue; 3775 3776 /* Note that we've changed the relocs, section contents, etc. */ 3777 elf_section_data (sec)->relocs = internal_relocs; 3778 elf_section_data (sec)->this_hdr.contents = contents; 3779 symtab_hdr->contents = (unsigned char *) isymbuf; 3780 3781 /* Reverse the condition of the first branch. */ 3782 switch (code) 3783 { 3784 case 0xc8: 3785 code = 0xc9; 3786 break; 3787 case 0xc9: 3788 code = 0xc8; 3789 break; 3790 case 0xc0: 3791 code = 0xc2; 3792 break; 3793 case 0xc2: 3794 code = 0xc0; 3795 break; 3796 case 0xc3: 3797 code = 0xc1; 3798 break; 3799 case 0xc1: 3800 code = 0xc3; 3801 break; 3802 case 0xc4: 3803 code = 0xc6; 3804 break; 3805 case 0xc6: 3806 code = 0xc4; 3807 break; 3808 case 0xc7: 3809 code = 0xc5; 3810 break; 3811 case 0xc5: 3812 code = 0xc7; 3813 break; 3814 case 0xe8: 3815 code = 0xe9; 3816 break; 3817 case 0x9d: 3818 code = 0xe8; 3819 break; 3820 case 0xea: 3821 code = 0xeb; 3822 break; 3823 case 0xeb: 3824 code = 0xea; 3825 break; 3826 } 3827 bfd_put_8 (abfd, code, contents + irel->r_offset - 1); 3828 3829 /* Set the reloc type and symbol for the first branch 3830 from the second branch. */ 3831 irel->r_info = nrel->r_info; 3832 3833 /* Make the reloc for the second branch a null reloc. */ 3834 nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info), 3835 R_MN10300_NONE); 3836 3837 /* Delete two bytes of data. */ 3838 if (!mn10300_elf_relax_delete_bytes (abfd, sec, 3839 irel->r_offset + 1, 2)) 3840 goto error_return; 3841 3842 /* That will change things, so, we should relax again. 3843 Note that this is not required, and it may be slow. */ 3844 *again = TRUE; 3845 } 3846 3847 /* Try to turn a 24 immediate, displacement or absolute address 3848 into a 8 immediate, displacement or absolute address. */ 3849 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_24) 3850 { 3851 bfd_vma value = symval; 3852 value += irel->r_addend; 3853 3854 /* See if the value will fit in 8 bits. */ 3855 if ((long) value < 0x7f && (long) value > -0x80) 3856 { 3857 unsigned char code; 3858 3859 /* AM33 insns which have 24 operands are 6 bytes long and 3860 will have 0xfd as the first byte. */ 3861 3862 /* Get the first opcode. */ 3863 code = bfd_get_8 (abfd, contents + irel->r_offset - 3); 3864 3865 if (code == 0xfd) 3866 { 3867 /* Get the second opcode. */ 3868 code = bfd_get_8 (abfd, contents + irel->r_offset - 2); 3869 3870 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit 3871 equivalent instructions exists. */ 3872 if (code != 0x6b && code != 0x7b 3873 && code != 0x8b && code != 0x9b 3874 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08 3875 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b 3876 || (code & 0x0f) == 0x0e)) 3877 { 3878 /* Not safe if the high bit is on as relaxing may 3879 move the value out of high mem and thus not fit 3880 in a signed 8bit value. This is currently over 3881 conservative. */ 3882 if ((value & 0x80) == 0) 3883 { 3884 /* Note that we've changed the relocation contents, 3885 etc. */ 3886 elf_section_data (sec)->relocs = internal_relocs; 3887 elf_section_data (sec)->this_hdr.contents = contents; 3888 symtab_hdr->contents = (unsigned char *) isymbuf; 3889 3890 /* Fix the opcode. */ 3891 bfd_put_8 (abfd, 0xfb, contents + irel->r_offset - 3); 3892 bfd_put_8 (abfd, code, contents + irel->r_offset - 2); 3893 3894 /* Fix the relocation's type. */ 3895 irel->r_info = 3896 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 3897 R_MN10300_8); 3898 3899 /* Delete two bytes of data. */ 3900 if (!mn10300_elf_relax_delete_bytes (abfd, sec, 3901 irel->r_offset + 1, 2)) 3902 goto error_return; 3903 3904 /* That will change things, so, we should relax 3905 again. Note that this is not required, and it 3906 may be slow. */ 3907 *again = TRUE; 3908 break; 3909 } 3910 } 3911 } 3912 } 3913 } 3914 3915 /* Try to turn a 32bit immediate, displacement or absolute address 3916 into a 16bit immediate, displacement or absolute address. */ 3917 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_32 3918 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32 3919 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32) 3920 { 3921 bfd_vma value = symval; 3922 3923 if (ELF32_R_TYPE (irel->r_info) != (int) R_MN10300_32) 3924 { 3925 asection * sgot; 3926 3927 sgot = hash_table->root.sgot; 3928 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32) 3929 { 3930 value = sgot->output_offset; 3931 3932 if (h) 3933 value += h->root.got.offset; 3934 else 3935 value += (elf_local_got_offsets 3936 (abfd)[ELF32_R_SYM (irel->r_info)]); 3937 } 3938 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32) 3939 value -= sgot->output_section->vma; 3940 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32) 3941 value = (sgot->output_section->vma 3942 - (sec->output_section->vma 3943 + sec->output_offset 3944 + irel->r_offset)); 3945 else 3946 abort (); 3947 } 3948 3949 value += irel->r_addend; 3950 3951 /* See if the value will fit in 24 bits. 3952 We allow any 16bit match here. We prune those we can't 3953 handle below. */ 3954 if ((long) value < 0x7fffff && (long) value > -0x800000) 3955 { 3956 unsigned char code; 3957 3958 /* AM33 insns which have 32bit operands are 7 bytes long and 3959 will have 0xfe as the first byte. */ 3960 3961 /* Get the first opcode. */ 3962 code = bfd_get_8 (abfd, contents + irel->r_offset - 3); 3963 3964 if (code == 0xfe) 3965 { 3966 /* Get the second opcode. */ 3967 code = bfd_get_8 (abfd, contents + irel->r_offset - 2); 3968 3969 /* All the am33 32 -> 24 relaxing possibilities. */ 3970 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit 3971 equivalent instructions exists. */ 3972 if (code != 0x6b && code != 0x7b 3973 && code != 0x8b && code != 0x9b 3974 && (ELF32_R_TYPE (irel->r_info) 3975 != (int) R_MN10300_GOTPC32) 3976 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08 3977 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b 3978 || (code & 0x0f) == 0x0e)) 3979 { 3980 /* Not safe if the high bit is on as relaxing may 3981 move the value out of high mem and thus not fit 3982 in a signed 16bit value. This is currently over 3983 conservative. */ 3984 if ((value & 0x8000) == 0) 3985 { 3986 /* Note that we've changed the relocation contents, 3987 etc. */ 3988 elf_section_data (sec)->relocs = internal_relocs; 3989 elf_section_data (sec)->this_hdr.contents = contents; 3990 symtab_hdr->contents = (unsigned char *) isymbuf; 3991 3992 /* Fix the opcode. */ 3993 bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 3); 3994 bfd_put_8 (abfd, code, contents + irel->r_offset - 2); 3995 3996 /* Fix the relocation's type. */ 3997 irel->r_info = 3998 ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 3999 (ELF32_R_TYPE (irel->r_info) 4000 == (int) R_MN10300_GOTOFF32) 4001 ? R_MN10300_GOTOFF24 4002 : (ELF32_R_TYPE (irel->r_info) 4003 == (int) R_MN10300_GOT32) 4004 ? R_MN10300_GOT24 : 4005 R_MN10300_24); 4006 4007 /* Delete one byte of data. */ 4008 if (!mn10300_elf_relax_delete_bytes (abfd, sec, 4009 irel->r_offset + 3, 1)) 4010 goto error_return; 4011 4012 /* That will change things, so, we should relax 4013 again. Note that this is not required, and it 4014 may be slow. */ 4015 *again = TRUE; 4016 break; 4017 } 4018 } 4019 } 4020 } 4021 4022 /* See if the value will fit in 16 bits. 4023 We allow any 16bit match here. We prune those we can't 4024 handle below. */ 4025 if ((long) value < 0x7fff && (long) value > -0x8000) 4026 { 4027 unsigned char code; 4028 4029 /* Most insns which have 32bit operands are 6 bytes long; 4030 exceptions are pcrel insns and bit insns. 4031 4032 We handle pcrel insns above. We don't bother trying 4033 to handle the bit insns here. 4034 4035 The first byte of the remaining insns will be 0xfc. */ 4036 4037 /* Get the first opcode. */ 4038 code = bfd_get_8 (abfd, contents + irel->r_offset - 2); 4039 4040 if (code != 0xfc) 4041 continue; 4042 4043 /* Get the second opcode. */ 4044 code = bfd_get_8 (abfd, contents + irel->r_offset - 1); 4045 4046 if ((code & 0xf0) < 0x80) 4047 switch (code & 0xf0) 4048 { 4049 /* mov (d32,am),dn -> mov (d32,am),dn 4050 mov dm,(d32,am) -> mov dn,(d32,am) 4051 mov (d32,am),an -> mov (d32,am),an 4052 mov dm,(d32,am) -> mov dn,(d32,am) 4053 movbu (d32,am),dn -> movbu (d32,am),dn 4054 movbu dm,(d32,am) -> movbu dn,(d32,am) 4055 movhu (d32,am),dn -> movhu (d32,am),dn 4056 movhu dm,(d32,am) -> movhu dn,(d32,am) */ 4057 case 0x00: 4058 case 0x10: 4059 case 0x20: 4060 case 0x30: 4061 case 0x40: 4062 case 0x50: 4063 case 0x60: 4064 case 0x70: 4065 /* Not safe if the high bit is on as relaxing may 4066 move the value out of high mem and thus not fit 4067 in a signed 16bit value. */ 4068 if (code == 0xcc 4069 && (value & 0x8000)) 4070 continue; 4071 4072 /* Note that we've changed the relocation contents, etc. */ 4073 elf_section_data (sec)->relocs = internal_relocs; 4074 elf_section_data (sec)->this_hdr.contents = contents; 4075 symtab_hdr->contents = (unsigned char *) isymbuf; 4076 4077 /* Fix the opcode. */ 4078 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); 4079 bfd_put_8 (abfd, code, contents + irel->r_offset - 1); 4080 4081 /* Fix the relocation's type. */ 4082 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 4083 (ELF32_R_TYPE (irel->r_info) 4084 == (int) R_MN10300_GOTOFF32) 4085 ? R_MN10300_GOTOFF16 4086 : (ELF32_R_TYPE (irel->r_info) 4087 == (int) R_MN10300_GOT32) 4088 ? R_MN10300_GOT16 4089 : (ELF32_R_TYPE (irel->r_info) 4090 == (int) R_MN10300_GOTPC32) 4091 ? R_MN10300_GOTPC16 : 4092 R_MN10300_16); 4093 4094 /* Delete two bytes of data. */ 4095 if (!mn10300_elf_relax_delete_bytes (abfd, sec, 4096 irel->r_offset + 2, 2)) 4097 goto error_return; 4098 4099 /* That will change things, so, we should relax again. 4100 Note that this is not required, and it may be slow. */ 4101 *again = TRUE; 4102 break; 4103 } 4104 else if ((code & 0xf0) == 0x80 4105 || (code & 0xf0) == 0x90) 4106 switch (code & 0xf3) 4107 { 4108 /* mov dn,(abs32) -> mov dn,(abs16) 4109 movbu dn,(abs32) -> movbu dn,(abs16) 4110 movhu dn,(abs32) -> movhu dn,(abs16) */ 4111 case 0x81: 4112 case 0x82: 4113 case 0x83: 4114 /* Note that we've changed the relocation contents, etc. */ 4115 elf_section_data (sec)->relocs = internal_relocs; 4116 elf_section_data (sec)->this_hdr.contents = contents; 4117 symtab_hdr->contents = (unsigned char *) isymbuf; 4118 4119 if ((code & 0xf3) == 0x81) 4120 code = 0x01 + (code & 0x0c); 4121 else if ((code & 0xf3) == 0x82) 4122 code = 0x02 + (code & 0x0c); 4123 else if ((code & 0xf3) == 0x83) 4124 code = 0x03 + (code & 0x0c); 4125 else 4126 abort (); 4127 4128 /* Fix the opcode. */ 4129 bfd_put_8 (abfd, code, contents + irel->r_offset - 2); 4130 4131 /* Fix the relocation's type. */ 4132 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 4133 (ELF32_R_TYPE (irel->r_info) 4134 == (int) R_MN10300_GOTOFF32) 4135 ? R_MN10300_GOTOFF16 4136 : (ELF32_R_TYPE (irel->r_info) 4137 == (int) R_MN10300_GOT32) 4138 ? R_MN10300_GOT16 4139 : (ELF32_R_TYPE (irel->r_info) 4140 == (int) R_MN10300_GOTPC32) 4141 ? R_MN10300_GOTPC16 : 4142 R_MN10300_16); 4143 4144 /* The opcode got shorter too, so we have to fix the 4145 addend and offset too! */ 4146 irel->r_offset -= 1; 4147 4148 /* Delete three bytes of data. */ 4149 if (!mn10300_elf_relax_delete_bytes (abfd, sec, 4150 irel->r_offset + 1, 3)) 4151 goto error_return; 4152 4153 /* That will change things, so, we should relax again. 4154 Note that this is not required, and it may be slow. */ 4155 *again = TRUE; 4156 break; 4157 4158 /* mov am,(abs32) -> mov am,(abs16) 4159 mov am,(d32,sp) -> mov am,(d16,sp) 4160 mov dm,(d32,sp) -> mov dm,(d32,sp) 4161 movbu dm,(d32,sp) -> movbu dm,(d32,sp) 4162 movhu dm,(d32,sp) -> movhu dm,(d32,sp) */ 4163 case 0x80: 4164 case 0x90: 4165 case 0x91: 4166 case 0x92: 4167 case 0x93: 4168 /* sp-based offsets are zero-extended. */ 4169 if (code >= 0x90 && code <= 0x93 4170 && (long) value < 0) 4171 continue; 4172 4173 /* Note that we've changed the relocation contents, etc. */ 4174 elf_section_data (sec)->relocs = internal_relocs; 4175 elf_section_data (sec)->this_hdr.contents = contents; 4176 symtab_hdr->contents = (unsigned char *) isymbuf; 4177 4178 /* Fix the opcode. */ 4179 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); 4180 bfd_put_8 (abfd, code, contents + irel->r_offset - 1); 4181 4182 /* Fix the relocation's type. */ 4183 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 4184 (ELF32_R_TYPE (irel->r_info) 4185 == (int) R_MN10300_GOTOFF32) 4186 ? R_MN10300_GOTOFF16 4187 : (ELF32_R_TYPE (irel->r_info) 4188 == (int) R_MN10300_GOT32) 4189 ? R_MN10300_GOT16 4190 : (ELF32_R_TYPE (irel->r_info) 4191 == (int) R_MN10300_GOTPC32) 4192 ? R_MN10300_GOTPC16 : 4193 R_MN10300_16); 4194 4195 /* Delete two bytes of data. */ 4196 if (!mn10300_elf_relax_delete_bytes (abfd, sec, 4197 irel->r_offset + 2, 2)) 4198 goto error_return; 4199 4200 /* That will change things, so, we should relax again. 4201 Note that this is not required, and it may be slow. */ 4202 *again = TRUE; 4203 break; 4204 } 4205 else if ((code & 0xf0) < 0xf0) 4206 switch (code & 0xfc) 4207 { 4208 /* mov imm32,dn -> mov imm16,dn 4209 mov imm32,an -> mov imm16,an 4210 mov (abs32),dn -> mov (abs16),dn 4211 movbu (abs32),dn -> movbu (abs16),dn 4212 movhu (abs32),dn -> movhu (abs16),dn */ 4213 case 0xcc: 4214 case 0xdc: 4215 case 0xa4: 4216 case 0xa8: 4217 case 0xac: 4218 /* Not safe if the high bit is on as relaxing may 4219 move the value out of high mem and thus not fit 4220 in a signed 16bit value. */ 4221 if (code == 0xcc 4222 && (value & 0x8000)) 4223 continue; 4224 4225 /* "mov imm16, an" zero-extends the immediate. */ 4226 if ((code & 0xfc) == 0xdc 4227 && (long) value < 0) 4228 continue; 4229 4230 /* Note that we've changed the relocation contents, etc. */ 4231 elf_section_data (sec)->relocs = internal_relocs; 4232 elf_section_data (sec)->this_hdr.contents = contents; 4233 symtab_hdr->contents = (unsigned char *) isymbuf; 4234 4235 if ((code & 0xfc) == 0xcc) 4236 code = 0x2c + (code & 0x03); 4237 else if ((code & 0xfc) == 0xdc) 4238 code = 0x24 + (code & 0x03); 4239 else if ((code & 0xfc) == 0xa4) 4240 code = 0x30 + (code & 0x03); 4241 else if ((code & 0xfc) == 0xa8) 4242 code = 0x34 + (code & 0x03); 4243 else if ((code & 0xfc) == 0xac) 4244 code = 0x38 + (code & 0x03); 4245 else 4246 abort (); 4247 4248 /* Fix the opcode. */ 4249 bfd_put_8 (abfd, code, contents + irel->r_offset - 2); 4250 4251 /* Fix the relocation's type. */ 4252 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 4253 (ELF32_R_TYPE (irel->r_info) 4254 == (int) R_MN10300_GOTOFF32) 4255 ? R_MN10300_GOTOFF16 4256 : (ELF32_R_TYPE (irel->r_info) 4257 == (int) R_MN10300_GOT32) 4258 ? R_MN10300_GOT16 4259 : (ELF32_R_TYPE (irel->r_info) 4260 == (int) R_MN10300_GOTPC32) 4261 ? R_MN10300_GOTPC16 : 4262 R_MN10300_16); 4263 4264 /* The opcode got shorter too, so we have to fix the 4265 addend and offset too! */ 4266 irel->r_offset -= 1; 4267 4268 /* Delete three bytes of data. */ 4269 if (!mn10300_elf_relax_delete_bytes (abfd, sec, 4270 irel->r_offset + 1, 3)) 4271 goto error_return; 4272 4273 /* That will change things, so, we should relax again. 4274 Note that this is not required, and it may be slow. */ 4275 *again = TRUE; 4276 break; 4277 4278 /* mov (abs32),an -> mov (abs16),an 4279 mov (d32,sp),an -> mov (d16,sp),an 4280 mov (d32,sp),dn -> mov (d16,sp),dn 4281 movbu (d32,sp),dn -> movbu (d16,sp),dn 4282 movhu (d32,sp),dn -> movhu (d16,sp),dn 4283 add imm32,dn -> add imm16,dn 4284 cmp imm32,dn -> cmp imm16,dn 4285 add imm32,an -> add imm16,an 4286 cmp imm32,an -> cmp imm16,an 4287 and imm32,dn -> and imm16,dn 4288 or imm32,dn -> or imm16,dn 4289 xor imm32,dn -> xor imm16,dn 4290 btst imm32,dn -> btst imm16,dn */ 4291 4292 case 0xa0: 4293 case 0xb0: 4294 case 0xb1: 4295 case 0xb2: 4296 case 0xb3: 4297 case 0xc0: 4298 case 0xc8: 4299 4300 case 0xd0: 4301 case 0xd8: 4302 case 0xe0: 4303 case 0xe1: 4304 case 0xe2: 4305 case 0xe3: 4306 /* cmp imm16, an zero-extends the immediate. */ 4307 if (code == 0xdc 4308 && (long) value < 0) 4309 continue; 4310 4311 /* So do sp-based offsets. */ 4312 if (code >= 0xb0 && code <= 0xb3 4313 && (long) value < 0) 4314 continue; 4315 4316 /* Note that we've changed the relocation contents, etc. */ 4317 elf_section_data (sec)->relocs = internal_relocs; 4318 elf_section_data (sec)->this_hdr.contents = contents; 4319 symtab_hdr->contents = (unsigned char *) isymbuf; 4320 4321 /* Fix the opcode. */ 4322 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); 4323 bfd_put_8 (abfd, code, contents + irel->r_offset - 1); 4324 4325 /* Fix the relocation's type. */ 4326 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 4327 (ELF32_R_TYPE (irel->r_info) 4328 == (int) R_MN10300_GOTOFF32) 4329 ? R_MN10300_GOTOFF16 4330 : (ELF32_R_TYPE (irel->r_info) 4331 == (int) R_MN10300_GOT32) 4332 ? R_MN10300_GOT16 4333 : (ELF32_R_TYPE (irel->r_info) 4334 == (int) R_MN10300_GOTPC32) 4335 ? R_MN10300_GOTPC16 : 4336 R_MN10300_16); 4337 4338 /* Delete two bytes of data. */ 4339 if (!mn10300_elf_relax_delete_bytes (abfd, sec, 4340 irel->r_offset + 2, 2)) 4341 goto error_return; 4342 4343 /* That will change things, so, we should relax again. 4344 Note that this is not required, and it may be slow. */ 4345 *again = TRUE; 4346 break; 4347 } 4348 else if (code == 0xfe) 4349 { 4350 /* add imm32,sp -> add imm16,sp */ 4351 4352 /* Note that we've changed the relocation contents, etc. */ 4353 elf_section_data (sec)->relocs = internal_relocs; 4354 elf_section_data (sec)->this_hdr.contents = contents; 4355 symtab_hdr->contents = (unsigned char *) isymbuf; 4356 4357 /* Fix the opcode. */ 4358 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); 4359 bfd_put_8 (abfd, 0xfe, contents + irel->r_offset - 1); 4360 4361 /* Fix the relocation's type. */ 4362 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 4363 (ELF32_R_TYPE (irel->r_info) 4364 == (int) R_MN10300_GOT32) 4365 ? R_MN10300_GOT16 4366 : (ELF32_R_TYPE (irel->r_info) 4367 == (int) R_MN10300_GOTOFF32) 4368 ? R_MN10300_GOTOFF16 4369 : (ELF32_R_TYPE (irel->r_info) 4370 == (int) R_MN10300_GOTPC32) 4371 ? R_MN10300_GOTPC16 : 4372 R_MN10300_16); 4373 4374 /* Delete two bytes of data. */ 4375 if (!mn10300_elf_relax_delete_bytes (abfd, sec, 4376 irel->r_offset + 2, 2)) 4377 goto error_return; 4378 4379 /* That will change things, so, we should relax again. 4380 Note that this is not required, and it may be slow. */ 4381 *again = TRUE; 4382 break; 4383 } 4384 } 4385 } 4386 } 4387 4388 if (isymbuf != NULL 4389 && symtab_hdr->contents != (unsigned char *) isymbuf) 4390 { 4391 if (! link_info->keep_memory) 4392 free (isymbuf); 4393 else 4394 { 4395 /* Cache the symbols for elf_link_input_bfd. */ 4396 symtab_hdr->contents = (unsigned char *) isymbuf; 4397 } 4398 } 4399 4400 if (contents != NULL 4401 && elf_section_data (sec)->this_hdr.contents != contents) 4402 { 4403 if (! link_info->keep_memory) 4404 free (contents); 4405 else 4406 { 4407 /* Cache the section contents for elf_link_input_bfd. */ 4408 elf_section_data (sec)->this_hdr.contents = contents; 4409 } 4410 } 4411 4412 if (internal_relocs != NULL 4413 && elf_section_data (sec)->relocs != internal_relocs) 4414 free (internal_relocs); 4415 4416 return TRUE; 4417 4418 error_return: 4419 if (isymbuf != NULL 4420 && symtab_hdr->contents != (unsigned char *) isymbuf) 4421 free (isymbuf); 4422 if (contents != NULL 4423 && elf_section_data (section)->this_hdr.contents != contents) 4424 free (contents); 4425 if (internal_relocs != NULL 4426 && elf_section_data (section)->relocs != internal_relocs) 4427 free (internal_relocs); 4428 4429 return FALSE; 4430 } 4431 4432 /* This is a version of bfd_generic_get_relocated_section_contents 4433 which uses mn10300_elf_relocate_section. */ 4434 4435 static bfd_byte * 4436 mn10300_elf_get_relocated_section_contents (bfd *output_bfd, 4437 struct bfd_link_info *link_info, 4438 struct bfd_link_order *link_order, 4439 bfd_byte *data, 4440 bfd_boolean relocatable, 4441 asymbol **symbols) 4442 { 4443 Elf_Internal_Shdr *symtab_hdr; 4444 asection *input_section = link_order->u.indirect.section; 4445 bfd *input_bfd = input_section->owner; 4446 asection **sections = NULL; 4447 Elf_Internal_Rela *internal_relocs = NULL; 4448 Elf_Internal_Sym *isymbuf = NULL; 4449 4450 /* We only need to handle the case of relaxing, or of having a 4451 particular set of section contents, specially. */ 4452 if (relocatable 4453 || elf_section_data (input_section)->this_hdr.contents == NULL) 4454 return bfd_generic_get_relocated_section_contents (output_bfd, link_info, 4455 link_order, data, 4456 relocatable, 4457 symbols); 4458 4459 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 4460 4461 memcpy (data, elf_section_data (input_section)->this_hdr.contents, 4462 (size_t) input_section->size); 4463 4464 if ((input_section->flags & SEC_RELOC) != 0 4465 && input_section->reloc_count > 0) 4466 { 4467 asection **secpp; 4468 Elf_Internal_Sym *isym, *isymend; 4469 bfd_size_type amt; 4470 4471 internal_relocs = _bfd_elf_link_read_relocs (input_bfd, input_section, 4472 NULL, NULL, FALSE); 4473 if (internal_relocs == NULL) 4474 goto error_return; 4475 4476 if (symtab_hdr->sh_info != 0) 4477 { 4478 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 4479 if (isymbuf == NULL) 4480 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, 4481 symtab_hdr->sh_info, 0, 4482 NULL, NULL, NULL); 4483 if (isymbuf == NULL) 4484 goto error_return; 4485 } 4486 4487 amt = symtab_hdr->sh_info; 4488 amt *= sizeof (asection *); 4489 sections = bfd_malloc (amt); 4490 if (sections == NULL && amt != 0) 4491 goto error_return; 4492 4493 isymend = isymbuf + symtab_hdr->sh_info; 4494 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) 4495 { 4496 asection *isec; 4497 4498 if (isym->st_shndx == SHN_UNDEF) 4499 isec = bfd_und_section_ptr; 4500 else if (isym->st_shndx == SHN_ABS) 4501 isec = bfd_abs_section_ptr; 4502 else if (isym->st_shndx == SHN_COMMON) 4503 isec = bfd_com_section_ptr; 4504 else 4505 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); 4506 4507 *secpp = isec; 4508 } 4509 4510 if (! mn10300_elf_relocate_section (output_bfd, link_info, input_bfd, 4511 input_section, data, internal_relocs, 4512 isymbuf, sections)) 4513 goto error_return; 4514 4515 if (sections != NULL) 4516 free (sections); 4517 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) 4518 free (isymbuf); 4519 if (internal_relocs != elf_section_data (input_section)->relocs) 4520 free (internal_relocs); 4521 } 4522 4523 return data; 4524 4525 error_return: 4526 if (sections != NULL) 4527 free (sections); 4528 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) 4529 free (isymbuf); 4530 if (internal_relocs != NULL 4531 && internal_relocs != elf_section_data (input_section)->relocs) 4532 free (internal_relocs); 4533 return NULL; 4534 } 4535 4536 /* Assorted hash table functions. */ 4537 4538 /* Initialize an entry in the link hash table. */ 4539 4540 /* Create an entry in an MN10300 ELF linker hash table. */ 4541 4542 static struct bfd_hash_entry * 4543 elf32_mn10300_link_hash_newfunc (struct bfd_hash_entry *entry, 4544 struct bfd_hash_table *table, 4545 const char *string) 4546 { 4547 struct elf32_mn10300_link_hash_entry *ret = 4548 (struct elf32_mn10300_link_hash_entry *) entry; 4549 4550 /* Allocate the structure if it has not already been allocated by a 4551 subclass. */ 4552 if (ret == NULL) 4553 ret = (struct elf32_mn10300_link_hash_entry *) 4554 bfd_hash_allocate (table, sizeof (* ret)); 4555 if (ret == NULL) 4556 return (struct bfd_hash_entry *) ret; 4557 4558 /* Call the allocation method of the superclass. */ 4559 ret = (struct elf32_mn10300_link_hash_entry *) 4560 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 4561 table, string); 4562 if (ret != NULL) 4563 { 4564 ret->direct_calls = 0; 4565 ret->stack_size = 0; 4566 ret->movm_args = 0; 4567 ret->movm_stack_size = 0; 4568 ret->flags = 0; 4569 ret->value = 0; 4570 ret->tls_type = GOT_UNKNOWN; 4571 } 4572 4573 return (struct bfd_hash_entry *) ret; 4574 } 4575 4576 static void 4577 _bfd_mn10300_copy_indirect_symbol (struct bfd_link_info * info, 4578 struct elf_link_hash_entry * dir, 4579 struct elf_link_hash_entry * ind) 4580 { 4581 struct elf32_mn10300_link_hash_entry * edir; 4582 struct elf32_mn10300_link_hash_entry * eind; 4583 4584 edir = elf_mn10300_hash_entry (dir); 4585 eind = elf_mn10300_hash_entry (ind); 4586 4587 if (ind->root.type == bfd_link_hash_indirect 4588 && dir->got.refcount <= 0) 4589 { 4590 edir->tls_type = eind->tls_type; 4591 eind->tls_type = GOT_UNKNOWN; 4592 } 4593 edir->direct_calls = eind->direct_calls; 4594 edir->stack_size = eind->stack_size; 4595 edir->movm_args = eind->movm_args; 4596 edir->movm_stack_size = eind->movm_stack_size; 4597 edir->flags = eind->flags; 4598 4599 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 4600 } 4601 4602 /* Create an mn10300 ELF linker hash table. */ 4603 4604 static struct bfd_link_hash_table * 4605 elf32_mn10300_link_hash_table_create (bfd *abfd) 4606 { 4607 struct elf32_mn10300_link_hash_table *ret; 4608 bfd_size_type amt = sizeof (* ret); 4609 4610 ret = bfd_zmalloc (amt); 4611 if (ret == NULL) 4612 return NULL; 4613 4614 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, 4615 elf32_mn10300_link_hash_newfunc, 4616 sizeof (struct elf32_mn10300_link_hash_entry), 4617 MN10300_ELF_DATA)) 4618 { 4619 free (ret); 4620 return NULL; 4621 } 4622 4623 ret->tls_ldm_got.offset = -1; 4624 4625 amt = sizeof (struct elf_link_hash_table); 4626 ret->static_hash_table = bfd_zmalloc (amt); 4627 if (ret->static_hash_table == NULL) 4628 { 4629 free (ret); 4630 return NULL; 4631 } 4632 4633 if (!_bfd_elf_link_hash_table_init (&ret->static_hash_table->root, abfd, 4634 elf32_mn10300_link_hash_newfunc, 4635 sizeof (struct elf32_mn10300_link_hash_entry), 4636 MN10300_ELF_DATA)) 4637 { 4638 free (ret->static_hash_table); 4639 free (ret); 4640 return NULL; 4641 } 4642 return & ret->root.root; 4643 } 4644 4645 /* Free an mn10300 ELF linker hash table. */ 4646 4647 static void 4648 elf32_mn10300_link_hash_table_free (struct bfd_link_hash_table *hash) 4649 { 4650 struct elf32_mn10300_link_hash_table *ret 4651 = (struct elf32_mn10300_link_hash_table *) hash; 4652 4653 _bfd_elf_link_hash_table_free 4654 ((struct bfd_link_hash_table *) ret->static_hash_table); 4655 _bfd_elf_link_hash_table_free 4656 ((struct bfd_link_hash_table *) ret); 4657 } 4658 4659 static unsigned long 4660 elf_mn10300_mach (flagword flags) 4661 { 4662 switch (flags & EF_MN10300_MACH) 4663 { 4664 case E_MN10300_MACH_MN10300: 4665 default: 4666 return bfd_mach_mn10300; 4667 4668 case E_MN10300_MACH_AM33: 4669 return bfd_mach_am33; 4670 4671 case E_MN10300_MACH_AM33_2: 4672 return bfd_mach_am33_2; 4673 } 4674 } 4675 4676 /* The final processing done just before writing out a MN10300 ELF object 4677 file. This gets the MN10300 architecture right based on the machine 4678 number. */ 4679 4680 static void 4681 _bfd_mn10300_elf_final_write_processing (bfd *abfd, 4682 bfd_boolean linker ATTRIBUTE_UNUSED) 4683 { 4684 unsigned long val; 4685 4686 switch (bfd_get_mach (abfd)) 4687 { 4688 default: 4689 case bfd_mach_mn10300: 4690 val = E_MN10300_MACH_MN10300; 4691 break; 4692 4693 case bfd_mach_am33: 4694 val = E_MN10300_MACH_AM33; 4695 break; 4696 4697 case bfd_mach_am33_2: 4698 val = E_MN10300_MACH_AM33_2; 4699 break; 4700 } 4701 4702 elf_elfheader (abfd)->e_flags &= ~ (EF_MN10300_MACH); 4703 elf_elfheader (abfd)->e_flags |= val; 4704 } 4705 4706 static bfd_boolean 4707 _bfd_mn10300_elf_object_p (bfd *abfd) 4708 { 4709 bfd_default_set_arch_mach (abfd, bfd_arch_mn10300, 4710 elf_mn10300_mach (elf_elfheader (abfd)->e_flags)); 4711 return TRUE; 4712 } 4713 4714 /* Merge backend specific data from an object file to the output 4715 object file when linking. */ 4716 4717 static bfd_boolean 4718 _bfd_mn10300_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 4719 { 4720 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 4721 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 4722 return TRUE; 4723 4724 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) 4725 && bfd_get_mach (obfd) < bfd_get_mach (ibfd)) 4726 { 4727 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), 4728 bfd_get_mach (ibfd))) 4729 return FALSE; 4730 } 4731 4732 return TRUE; 4733 } 4734 4735 #define PLT0_ENTRY_SIZE 15 4736 #define PLT_ENTRY_SIZE 20 4737 #define PIC_PLT_ENTRY_SIZE 24 4738 4739 static const bfd_byte elf_mn10300_plt0_entry[PLT0_ENTRY_SIZE] = 4740 { 4741 0xfc, 0xa0, 0, 0, 0, 0, /* mov (.got+8),a0 */ 4742 0xfe, 0xe, 0x10, 0, 0, 0, 0, /* mov (.got+4),r1 */ 4743 0xf0, 0xf4, /* jmp (a0) */ 4744 }; 4745 4746 static const bfd_byte elf_mn10300_plt_entry[PLT_ENTRY_SIZE] = 4747 { 4748 0xfc, 0xa0, 0, 0, 0, 0, /* mov (nameN@GOT + .got),a0 */ 4749 0xf0, 0xf4, /* jmp (a0) */ 4750 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */ 4751 0xdc, 0, 0, 0, 0, /* jmp .plt0 */ 4752 }; 4753 4754 static const bfd_byte elf_mn10300_pic_plt_entry[PIC_PLT_ENTRY_SIZE] = 4755 { 4756 0xfc, 0x22, 0, 0, 0, 0, /* mov (nameN@GOT,a2),a0 */ 4757 0xf0, 0xf4, /* jmp (a0) */ 4758 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */ 4759 0xf8, 0x22, 8, /* mov (8,a2),a0 */ 4760 0xfb, 0xa, 0x1a, 4, /* mov (4,a2),r1 */ 4761 0xf0, 0xf4, /* jmp (a0) */ 4762 }; 4763 4764 /* Return size of the first PLT entry. */ 4765 #define elf_mn10300_sizeof_plt0(info) \ 4766 (info->shared ? PIC_PLT_ENTRY_SIZE : PLT0_ENTRY_SIZE) 4767 4768 /* Return size of a PLT entry. */ 4769 #define elf_mn10300_sizeof_plt(info) \ 4770 (info->shared ? PIC_PLT_ENTRY_SIZE : PLT_ENTRY_SIZE) 4771 4772 /* Return offset of the PLT0 address in an absolute PLT entry. */ 4773 #define elf_mn10300_plt_plt0_offset(info) 16 4774 4775 /* Return offset of the linker in PLT0 entry. */ 4776 #define elf_mn10300_plt0_linker_offset(info) 2 4777 4778 /* Return offset of the GOT id in PLT0 entry. */ 4779 #define elf_mn10300_plt0_gotid_offset(info) 9 4780 4781 /* Return offset of the temporary in PLT entry. */ 4782 #define elf_mn10300_plt_temp_offset(info) 8 4783 4784 /* Return offset of the symbol in PLT entry. */ 4785 #define elf_mn10300_plt_symbol_offset(info) 2 4786 4787 /* Return offset of the relocation in PLT entry. */ 4788 #define elf_mn10300_plt_reloc_offset(info) 11 4789 4790 /* The name of the dynamic interpreter. This is put in the .interp 4791 section. */ 4792 4793 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" 4794 4795 /* Create dynamic sections when linking against a dynamic object. */ 4796 4797 static bfd_boolean 4798 _bfd_mn10300_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 4799 { 4800 flagword flags; 4801 asection * s; 4802 const struct elf_backend_data * bed = get_elf_backend_data (abfd); 4803 struct elf32_mn10300_link_hash_table *htab = elf32_mn10300_hash_table (info); 4804 int ptralign = 0; 4805 4806 switch (bed->s->arch_size) 4807 { 4808 case 32: 4809 ptralign = 2; 4810 break; 4811 4812 case 64: 4813 ptralign = 3; 4814 break; 4815 4816 default: 4817 bfd_set_error (bfd_error_bad_value); 4818 return FALSE; 4819 } 4820 4821 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and 4822 .rel[a].bss sections. */ 4823 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 4824 | SEC_LINKER_CREATED); 4825 4826 s = bfd_make_section_anyway_with_flags (abfd, 4827 (bed->default_use_rela_p 4828 ? ".rela.plt" : ".rel.plt"), 4829 flags | SEC_READONLY); 4830 htab->root.srelplt = s; 4831 if (s == NULL 4832 || ! bfd_set_section_alignment (abfd, s, ptralign)) 4833 return FALSE; 4834 4835 if (! _bfd_mn10300_elf_create_got_section (abfd, info)) 4836 return FALSE; 4837 4838 if (bed->want_dynbss) 4839 { 4840 /* The .dynbss section is a place to put symbols which are defined 4841 by dynamic objects, are referenced by regular objects, and are 4842 not functions. We must allocate space for them in the process 4843 image and use a R_*_COPY reloc to tell the dynamic linker to 4844 initialize them at run time. The linker script puts the .dynbss 4845 section into the .bss section of the final image. */ 4846 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", 4847 SEC_ALLOC | SEC_LINKER_CREATED); 4848 if (s == NULL) 4849 return FALSE; 4850 4851 /* The .rel[a].bss section holds copy relocs. This section is not 4852 normally needed. We need to create it here, though, so that the 4853 linker will map it to an output section. We can't just create it 4854 only if we need it, because we will not know whether we need it 4855 until we have seen all the input files, and the first time the 4856 main linker code calls BFD after examining all the input files 4857 (size_dynamic_sections) the input sections have already been 4858 mapped to the output sections. If the section turns out not to 4859 be needed, we can discard it later. We will never need this 4860 section when generating a shared object, since they do not use 4861 copy relocs. */ 4862 if (! info->shared) 4863 { 4864 s = bfd_make_section_anyway_with_flags (abfd, 4865 (bed->default_use_rela_p 4866 ? ".rela.bss" : ".rel.bss"), 4867 flags | SEC_READONLY); 4868 if (s == NULL 4869 || ! bfd_set_section_alignment (abfd, s, ptralign)) 4870 return FALSE; 4871 } 4872 } 4873 4874 return TRUE; 4875 } 4876 4877 /* Adjust a symbol defined by a dynamic object and referenced by a 4878 regular object. The current definition is in some section of the 4879 dynamic object, but we're not including those sections. We have to 4880 change the definition to something the rest of the link can 4881 understand. */ 4882 4883 static bfd_boolean 4884 _bfd_mn10300_elf_adjust_dynamic_symbol (struct bfd_link_info * info, 4885 struct elf_link_hash_entry * h) 4886 { 4887 struct elf32_mn10300_link_hash_table *htab = elf32_mn10300_hash_table (info); 4888 bfd * dynobj; 4889 asection * s; 4890 4891 dynobj = htab->root.dynobj; 4892 4893 /* Make sure we know what is going on here. */ 4894 BFD_ASSERT (dynobj != NULL 4895 && (h->needs_plt 4896 || h->u.weakdef != NULL 4897 || (h->def_dynamic 4898 && h->ref_regular 4899 && !h->def_regular))); 4900 4901 /* If this is a function, put it in the procedure linkage table. We 4902 will fill in the contents of the procedure linkage table later, 4903 when we know the address of the .got section. */ 4904 if (h->type == STT_FUNC 4905 || h->needs_plt) 4906 { 4907 if (! info->shared 4908 && !h->def_dynamic 4909 && !h->ref_dynamic) 4910 { 4911 /* This case can occur if we saw a PLT reloc in an input 4912 file, but the symbol was never referred to by a dynamic 4913 object. In such a case, we don't actually need to build 4914 a procedure linkage table, and we can just do a REL32 4915 reloc instead. */ 4916 BFD_ASSERT (h->needs_plt); 4917 return TRUE; 4918 } 4919 4920 /* Make sure this symbol is output as a dynamic symbol. */ 4921 if (h->dynindx == -1) 4922 { 4923 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 4924 return FALSE; 4925 } 4926 4927 s = htab->root.splt; 4928 BFD_ASSERT (s != NULL); 4929 4930 /* If this is the first .plt entry, make room for the special 4931 first entry. */ 4932 if (s->size == 0) 4933 s->size += elf_mn10300_sizeof_plt0 (info); 4934 4935 /* If this symbol is not defined in a regular file, and we are 4936 not generating a shared library, then set the symbol to this 4937 location in the .plt. This is required to make function 4938 pointers compare as equal between the normal executable and 4939 the shared library. */ 4940 if (! info->shared 4941 && !h->def_regular) 4942 { 4943 h->root.u.def.section = s; 4944 h->root.u.def.value = s->size; 4945 } 4946 4947 h->plt.offset = s->size; 4948 4949 /* Make room for this entry. */ 4950 s->size += elf_mn10300_sizeof_plt (info); 4951 4952 /* We also need to make an entry in the .got.plt section, which 4953 will be placed in the .got section by the linker script. */ 4954 s = htab->root.sgotplt; 4955 BFD_ASSERT (s != NULL); 4956 s->size += 4; 4957 4958 /* We also need to make an entry in the .rela.plt section. */ 4959 s = bfd_get_linker_section (dynobj, ".rela.plt"); 4960 BFD_ASSERT (s != NULL); 4961 s->size += sizeof (Elf32_External_Rela); 4962 4963 return TRUE; 4964 } 4965 4966 /* If this is a weak symbol, and there is a real definition, the 4967 processor independent code will have arranged for us to see the 4968 real definition first, and we can just use the same value. */ 4969 if (h->u.weakdef != NULL) 4970 { 4971 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 4972 || h->u.weakdef->root.type == bfd_link_hash_defweak); 4973 h->root.u.def.section = h->u.weakdef->root.u.def.section; 4974 h->root.u.def.value = h->u.weakdef->root.u.def.value; 4975 return TRUE; 4976 } 4977 4978 /* This is a reference to a symbol defined by a dynamic object which 4979 is not a function. */ 4980 4981 /* If we are creating a shared library, we must presume that the 4982 only references to the symbol are via the global offset table. 4983 For such cases we need not do anything here; the relocations will 4984 be handled correctly by relocate_section. */ 4985 if (info->shared) 4986 return TRUE; 4987 4988 /* If there are no references to this symbol that do not use the 4989 GOT, we don't need to generate a copy reloc. */ 4990 if (!h->non_got_ref) 4991 return TRUE; 4992 4993 /* We must allocate the symbol in our .dynbss section, which will 4994 become part of the .bss section of the executable. There will be 4995 an entry for this symbol in the .dynsym section. The dynamic 4996 object will contain position independent code, so all references 4997 from the dynamic object to this symbol will go through the global 4998 offset table. The dynamic linker will use the .dynsym entry to 4999 determine the address it must put in the global offset table, so 5000 both the dynamic object and the regular object will refer to the 5001 same memory location for the variable. */ 5002 5003 s = bfd_get_linker_section (dynobj, ".dynbss"); 5004 BFD_ASSERT (s != NULL); 5005 5006 /* We must generate a R_MN10300_COPY reloc to tell the dynamic linker to 5007 copy the initial value out of the dynamic object and into the 5008 runtime process image. We need to remember the offset into the 5009 .rela.bss section we are going to use. */ 5010 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 5011 { 5012 asection * srel; 5013 5014 srel = bfd_get_linker_section (dynobj, ".rela.bss"); 5015 BFD_ASSERT (srel != NULL); 5016 srel->size += sizeof (Elf32_External_Rela); 5017 h->needs_copy = 1; 5018 } 5019 5020 return _bfd_elf_adjust_dynamic_copy (h, s); 5021 } 5022 5023 /* Set the sizes of the dynamic sections. */ 5024 5025 static bfd_boolean 5026 _bfd_mn10300_elf_size_dynamic_sections (bfd * output_bfd, 5027 struct bfd_link_info * info) 5028 { 5029 struct elf32_mn10300_link_hash_table *htab = elf32_mn10300_hash_table (info); 5030 bfd * dynobj; 5031 asection * s; 5032 bfd_boolean plt; 5033 bfd_boolean relocs; 5034 bfd_boolean reltext; 5035 5036 dynobj = htab->root.dynobj; 5037 BFD_ASSERT (dynobj != NULL); 5038 5039 if (elf_hash_table (info)->dynamic_sections_created) 5040 { 5041 /* Set the contents of the .interp section to the interpreter. */ 5042 if (info->executable) 5043 { 5044 s = bfd_get_linker_section (dynobj, ".interp"); 5045 BFD_ASSERT (s != NULL); 5046 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 5047 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 5048 } 5049 } 5050 else 5051 { 5052 /* We may have created entries in the .rela.got section. 5053 However, if we are not creating the dynamic sections, we will 5054 not actually use these entries. Reset the size of .rela.got, 5055 which will cause it to get stripped from the output file 5056 below. */ 5057 s = htab->root.sgot; 5058 if (s != NULL) 5059 s->size = 0; 5060 } 5061 5062 if (htab->tls_ldm_got.refcount > 0) 5063 { 5064 s = bfd_get_linker_section (dynobj, ".rela.got"); 5065 BFD_ASSERT (s != NULL); 5066 s->size += sizeof (Elf32_External_Rela); 5067 } 5068 5069 /* The check_relocs and adjust_dynamic_symbol entry points have 5070 determined the sizes of the various dynamic sections. Allocate 5071 memory for them. */ 5072 plt = FALSE; 5073 relocs = FALSE; 5074 reltext = FALSE; 5075 for (s = dynobj->sections; s != NULL; s = s->next) 5076 { 5077 const char * name; 5078 5079 if ((s->flags & SEC_LINKER_CREATED) == 0) 5080 continue; 5081 5082 /* It's OK to base decisions on the section name, because none 5083 of the dynobj section names depend upon the input files. */ 5084 name = bfd_get_section_name (dynobj, s); 5085 5086 if (streq (name, ".plt")) 5087 { 5088 /* Remember whether there is a PLT. */ 5089 plt = s->size != 0; 5090 } 5091 else if (CONST_STRNEQ (name, ".rela")) 5092 { 5093 if (s->size != 0) 5094 { 5095 asection * target; 5096 5097 /* Remember whether there are any reloc sections other 5098 than .rela.plt. */ 5099 if (! streq (name, ".rela.plt")) 5100 { 5101 const char * outname; 5102 5103 relocs = TRUE; 5104 5105 /* If this relocation section applies to a read only 5106 section, then we probably need a DT_TEXTREL 5107 entry. The entries in the .rela.plt section 5108 really apply to the .got section, which we 5109 created ourselves and so know is not readonly. */ 5110 outname = bfd_get_section_name (output_bfd, 5111 s->output_section); 5112 target = bfd_get_section_by_name (output_bfd, outname + 5); 5113 if (target != NULL 5114 && (target->flags & SEC_READONLY) != 0 5115 && (target->flags & SEC_ALLOC) != 0) 5116 reltext = TRUE; 5117 } 5118 5119 /* We use the reloc_count field as a counter if we need 5120 to copy relocs into the output file. */ 5121 s->reloc_count = 0; 5122 } 5123 } 5124 else if (! CONST_STRNEQ (name, ".got") 5125 && ! streq (name, ".dynbss")) 5126 /* It's not one of our sections, so don't allocate space. */ 5127 continue; 5128 5129 if (s->size == 0) 5130 { 5131 /* If we don't need this section, strip it from the 5132 output file. This is mostly to handle .rela.bss and 5133 .rela.plt. We must create both sections in 5134 create_dynamic_sections, because they must be created 5135 before the linker maps input sections to output 5136 sections. The linker does that before 5137 adjust_dynamic_symbol is called, and it is that 5138 function which decides whether anything needs to go 5139 into these sections. */ 5140 s->flags |= SEC_EXCLUDE; 5141 continue; 5142 } 5143 5144 if ((s->flags & SEC_HAS_CONTENTS) == 0) 5145 continue; 5146 5147 /* Allocate memory for the section contents. We use bfd_zalloc 5148 here in case unused entries are not reclaimed before the 5149 section's contents are written out. This should not happen, 5150 but this way if it does, we get a R_MN10300_NONE reloc 5151 instead of garbage. */ 5152 s->contents = bfd_zalloc (dynobj, s->size); 5153 if (s->contents == NULL) 5154 return FALSE; 5155 } 5156 5157 if (elf_hash_table (info)->dynamic_sections_created) 5158 { 5159 /* Add some entries to the .dynamic section. We fill in the 5160 values later, in _bfd_mn10300_elf_finish_dynamic_sections, 5161 but we must add the entries now so that we get the correct 5162 size for the .dynamic section. The DT_DEBUG entry is filled 5163 in by the dynamic linker and used by the debugger. */ 5164 if (! info->shared) 5165 { 5166 if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0)) 5167 return FALSE; 5168 } 5169 5170 if (plt) 5171 { 5172 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0) 5173 || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0) 5174 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA) 5175 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0)) 5176 return FALSE; 5177 } 5178 5179 if (relocs) 5180 { 5181 if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0) 5182 || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0) 5183 || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT, 5184 sizeof (Elf32_External_Rela))) 5185 return FALSE; 5186 } 5187 5188 if (reltext) 5189 { 5190 if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0)) 5191 return FALSE; 5192 } 5193 } 5194 5195 return TRUE; 5196 } 5197 5198 /* Finish up dynamic symbol handling. We set the contents of various 5199 dynamic sections here. */ 5200 5201 static bfd_boolean 5202 _bfd_mn10300_elf_finish_dynamic_symbol (bfd * output_bfd, 5203 struct bfd_link_info * info, 5204 struct elf_link_hash_entry * h, 5205 Elf_Internal_Sym * sym) 5206 { 5207 struct elf32_mn10300_link_hash_table *htab = elf32_mn10300_hash_table (info); 5208 bfd * dynobj; 5209 5210 dynobj = htab->root.dynobj; 5211 5212 if (h->plt.offset != (bfd_vma) -1) 5213 { 5214 asection * splt; 5215 asection * sgot; 5216 asection * srel; 5217 bfd_vma plt_index; 5218 bfd_vma got_offset; 5219 Elf_Internal_Rela rel; 5220 5221 /* This symbol has an entry in the procedure linkage table. Set 5222 it up. */ 5223 5224 BFD_ASSERT (h->dynindx != -1); 5225 5226 splt = htab->root.splt; 5227 sgot = htab->root.sgotplt; 5228 srel = bfd_get_linker_section (dynobj, ".rela.plt"); 5229 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL); 5230 5231 /* Get the index in the procedure linkage table which 5232 corresponds to this symbol. This is the index of this symbol 5233 in all the symbols for which we are making plt entries. The 5234 first entry in the procedure linkage table is reserved. */ 5235 plt_index = ((h->plt.offset - elf_mn10300_sizeof_plt0 (info)) 5236 / elf_mn10300_sizeof_plt (info)); 5237 5238 /* Get the offset into the .got table of the entry that 5239 corresponds to this function. Each .got entry is 4 bytes. 5240 The first three are reserved. */ 5241 got_offset = (plt_index + 3) * 4; 5242 5243 /* Fill in the entry in the procedure linkage table. */ 5244 if (! info->shared) 5245 { 5246 memcpy (splt->contents + h->plt.offset, elf_mn10300_plt_entry, 5247 elf_mn10300_sizeof_plt (info)); 5248 bfd_put_32 (output_bfd, 5249 (sgot->output_section->vma 5250 + sgot->output_offset 5251 + got_offset), 5252 (splt->contents + h->plt.offset 5253 + elf_mn10300_plt_symbol_offset (info))); 5254 5255 bfd_put_32 (output_bfd, 5256 (1 - h->plt.offset - elf_mn10300_plt_plt0_offset (info)), 5257 (splt->contents + h->plt.offset 5258 + elf_mn10300_plt_plt0_offset (info))); 5259 } 5260 else 5261 { 5262 memcpy (splt->contents + h->plt.offset, elf_mn10300_pic_plt_entry, 5263 elf_mn10300_sizeof_plt (info)); 5264 5265 bfd_put_32 (output_bfd, got_offset, 5266 (splt->contents + h->plt.offset 5267 + elf_mn10300_plt_symbol_offset (info))); 5268 } 5269 5270 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), 5271 (splt->contents + h->plt.offset 5272 + elf_mn10300_plt_reloc_offset (info))); 5273 5274 /* Fill in the entry in the global offset table. */ 5275 bfd_put_32 (output_bfd, 5276 (splt->output_section->vma 5277 + splt->output_offset 5278 + h->plt.offset 5279 + elf_mn10300_plt_temp_offset (info)), 5280 sgot->contents + got_offset); 5281 5282 /* Fill in the entry in the .rela.plt section. */ 5283 rel.r_offset = (sgot->output_section->vma 5284 + sgot->output_offset 5285 + got_offset); 5286 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_JMP_SLOT); 5287 rel.r_addend = 0; 5288 bfd_elf32_swap_reloca_out (output_bfd, &rel, 5289 (bfd_byte *) ((Elf32_External_Rela *) srel->contents 5290 + plt_index)); 5291 5292 if (!h->def_regular) 5293 /* Mark the symbol as undefined, rather than as defined in 5294 the .plt section. Leave the value alone. */ 5295 sym->st_shndx = SHN_UNDEF; 5296 } 5297 5298 if (h->got.offset != (bfd_vma) -1) 5299 { 5300 asection * sgot; 5301 asection * srel; 5302 Elf_Internal_Rela rel; 5303 5304 /* This symbol has an entry in the global offset table. Set it up. */ 5305 sgot = htab->root.sgot; 5306 srel = bfd_get_linker_section (dynobj, ".rela.got"); 5307 BFD_ASSERT (sgot != NULL && srel != NULL); 5308 5309 rel.r_offset = (sgot->output_section->vma 5310 + sgot->output_offset 5311 + (h->got.offset & ~1)); 5312 5313 switch (elf_mn10300_hash_entry (h)->tls_type) 5314 { 5315 case GOT_TLS_GD: 5316 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); 5317 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset + 4); 5318 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_TLS_DTPMOD); 5319 rel.r_addend = 0; 5320 bfd_elf32_swap_reloca_out (output_bfd, & rel, 5321 (bfd_byte *) ((Elf32_External_Rela *) srel->contents 5322 + srel->reloc_count)); 5323 ++ srel->reloc_count; 5324 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_TLS_DTPOFF); 5325 rel.r_offset += 4; 5326 rel.r_addend = 0; 5327 break; 5328 5329 case GOT_TLS_IE: 5330 /* We originally stored the addend in the GOT, but at this 5331 point, we want to move it to the reloc instead as that's 5332 where the dynamic linker wants it. */ 5333 rel.r_addend = bfd_get_32 (output_bfd, sgot->contents + h->got.offset); 5334 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); 5335 if (h->dynindx == -1) 5336 rel.r_info = ELF32_R_INFO (0, R_MN10300_TLS_TPOFF); 5337 else 5338 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_TLS_TPOFF); 5339 break; 5340 5341 default: 5342 /* If this is a -Bsymbolic link, and the symbol is defined 5343 locally, we just want to emit a RELATIVE reloc. Likewise if 5344 the symbol was forced to be local because of a version file. 5345 The entry in the global offset table will already have been 5346 initialized in the relocate_section function. */ 5347 if (info->shared 5348 && (info->symbolic || h->dynindx == -1) 5349 && h->def_regular) 5350 { 5351 rel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE); 5352 rel.r_addend = (h->root.u.def.value 5353 + h->root.u.def.section->output_section->vma 5354 + h->root.u.def.section->output_offset); 5355 } 5356 else 5357 { 5358 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); 5359 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_GLOB_DAT); 5360 rel.r_addend = 0; 5361 } 5362 } 5363 5364 if (ELF32_R_TYPE (rel.r_info) != R_MN10300_NONE) 5365 { 5366 bfd_elf32_swap_reloca_out (output_bfd, &rel, 5367 (bfd_byte *) ((Elf32_External_Rela *) srel->contents 5368 + srel->reloc_count)); 5369 ++ srel->reloc_count; 5370 } 5371 } 5372 5373 if (h->needs_copy) 5374 { 5375 asection * s; 5376 Elf_Internal_Rela rel; 5377 5378 /* This symbol needs a copy reloc. Set it up. */ 5379 BFD_ASSERT (h->dynindx != -1 5380 && (h->root.type == bfd_link_hash_defined 5381 || h->root.type == bfd_link_hash_defweak)); 5382 5383 s = bfd_get_linker_section (dynobj, ".rela.bss"); 5384 BFD_ASSERT (s != NULL); 5385 5386 rel.r_offset = (h->root.u.def.value 5387 + h->root.u.def.section->output_section->vma 5388 + h->root.u.def.section->output_offset); 5389 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_COPY); 5390 rel.r_addend = 0; 5391 bfd_elf32_swap_reloca_out (output_bfd, & rel, 5392 (bfd_byte *) ((Elf32_External_Rela *) s->contents 5393 + s->reloc_count)); 5394 ++ s->reloc_count; 5395 } 5396 5397 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ 5398 if (h == elf_hash_table (info)->hdynamic 5399 || h == elf_hash_table (info)->hgot) 5400 sym->st_shndx = SHN_ABS; 5401 5402 return TRUE; 5403 } 5404 5405 /* Finish up the dynamic sections. */ 5406 5407 static bfd_boolean 5408 _bfd_mn10300_elf_finish_dynamic_sections (bfd * output_bfd, 5409 struct bfd_link_info * info) 5410 { 5411 bfd * dynobj; 5412 asection * sgot; 5413 asection * sdyn; 5414 struct elf32_mn10300_link_hash_table *htab = elf32_mn10300_hash_table (info); 5415 5416 dynobj = htab->root.dynobj; 5417 sgot = htab->root.sgotplt; 5418 BFD_ASSERT (sgot != NULL); 5419 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 5420 5421 if (elf_hash_table (info)->dynamic_sections_created) 5422 { 5423 asection * splt; 5424 Elf32_External_Dyn * dyncon; 5425 Elf32_External_Dyn * dynconend; 5426 5427 BFD_ASSERT (sdyn != NULL); 5428 5429 dyncon = (Elf32_External_Dyn *) sdyn->contents; 5430 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 5431 5432 for (; dyncon < dynconend; dyncon++) 5433 { 5434 Elf_Internal_Dyn dyn; 5435 const char * name; 5436 asection * s; 5437 5438 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 5439 5440 switch (dyn.d_tag) 5441 { 5442 default: 5443 break; 5444 5445 case DT_PLTGOT: 5446 name = ".got"; 5447 goto get_vma; 5448 5449 case DT_JMPREL: 5450 name = ".rela.plt"; 5451 get_vma: 5452 s = bfd_get_section_by_name (output_bfd, name); 5453 BFD_ASSERT (s != NULL); 5454 dyn.d_un.d_ptr = s->vma; 5455 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 5456 break; 5457 5458 case DT_PLTRELSZ: 5459 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 5460 BFD_ASSERT (s != NULL); 5461 dyn.d_un.d_val = s->size; 5462 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 5463 break; 5464 5465 case DT_RELASZ: 5466 /* My reading of the SVR4 ABI indicates that the 5467 procedure linkage table relocs (DT_JMPREL) should be 5468 included in the overall relocs (DT_RELA). This is 5469 what Solaris does. However, UnixWare can not handle 5470 that case. Therefore, we override the DT_RELASZ entry 5471 here to make it not include the JMPREL relocs. Since 5472 the linker script arranges for .rela.plt to follow all 5473 other relocation sections, we don't have to worry 5474 about changing the DT_RELA entry. */ 5475 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 5476 if (s != NULL) 5477 dyn.d_un.d_val -= s->size; 5478 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 5479 break; 5480 } 5481 } 5482 5483 /* Fill in the first entry in the procedure linkage table. */ 5484 splt = htab->root.splt; 5485 if (splt && splt->size > 0) 5486 { 5487 if (info->shared) 5488 { 5489 memcpy (splt->contents, elf_mn10300_pic_plt_entry, 5490 elf_mn10300_sizeof_plt (info)); 5491 } 5492 else 5493 { 5494 memcpy (splt->contents, elf_mn10300_plt0_entry, PLT0_ENTRY_SIZE); 5495 bfd_put_32 (output_bfd, 5496 sgot->output_section->vma + sgot->output_offset + 4, 5497 splt->contents + elf_mn10300_plt0_gotid_offset (info)); 5498 bfd_put_32 (output_bfd, 5499 sgot->output_section->vma + sgot->output_offset + 8, 5500 splt->contents + elf_mn10300_plt0_linker_offset (info)); 5501 } 5502 5503 /* UnixWare sets the entsize of .plt to 4, although that doesn't 5504 really seem like the right value. */ 5505 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; 5506 5507 /* UnixWare sets the entsize of .plt to 4, but this is incorrect 5508 as it means that the size of the PLT0 section (15 bytes) is not 5509 a multiple of the sh_entsize. Some ELF tools flag this as an 5510 error. We could pad PLT0 to 16 bytes, but that would introduce 5511 compatibilty issues with previous toolchains, so instead we 5512 just set the entry size to 1. */ 5513 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 1; 5514 } 5515 } 5516 5517 /* Fill in the first three entries in the global offset table. */ 5518 if (sgot->size > 0) 5519 { 5520 if (sdyn == NULL) 5521 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 5522 else 5523 bfd_put_32 (output_bfd, 5524 sdyn->output_section->vma + sdyn->output_offset, 5525 sgot->contents); 5526 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); 5527 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); 5528 } 5529 5530 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 5531 5532 return TRUE; 5533 } 5534 5535 /* Classify relocation types, such that combreloc can sort them 5536 properly. */ 5537 5538 static enum elf_reloc_type_class 5539 _bfd_mn10300_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 5540 const asection *rel_sec ATTRIBUTE_UNUSED, 5541 const Elf_Internal_Rela *rela) 5542 { 5543 switch ((int) ELF32_R_TYPE (rela->r_info)) 5544 { 5545 case R_MN10300_RELATIVE: return reloc_class_relative; 5546 case R_MN10300_JMP_SLOT: return reloc_class_plt; 5547 case R_MN10300_COPY: return reloc_class_copy; 5548 default: return reloc_class_normal; 5549 } 5550 } 5551 5552 /* Allocate space for an MN10300 extension to the bfd elf data structure. */ 5553 5554 static bfd_boolean 5555 mn10300_elf_mkobject (bfd *abfd) 5556 { 5557 return bfd_elf_allocate_object (abfd, sizeof (struct elf_mn10300_obj_tdata), 5558 MN10300_ELF_DATA); 5559 } 5560 5561 #define bfd_elf32_mkobject mn10300_elf_mkobject 5562 5563 #ifndef ELF_ARCH 5564 #define TARGET_LITTLE_SYM bfd_elf32_mn10300_vec 5565 #define TARGET_LITTLE_NAME "elf32-mn10300" 5566 #define ELF_ARCH bfd_arch_mn10300 5567 #define ELF_TARGET_ID MN10300_ELF_DATA 5568 #define ELF_MACHINE_CODE EM_MN10300 5569 #define ELF_MACHINE_ALT1 EM_CYGNUS_MN10300 5570 #define ELF_MAXPAGESIZE 0x1000 5571 #endif 5572 5573 #define elf_info_to_howto mn10300_info_to_howto 5574 #define elf_info_to_howto_rel 0 5575 #define elf_backend_can_gc_sections 1 5576 #define elf_backend_rela_normal 1 5577 #define elf_backend_check_relocs mn10300_elf_check_relocs 5578 #define elf_backend_gc_mark_hook mn10300_elf_gc_mark_hook 5579 #define elf_backend_relocate_section mn10300_elf_relocate_section 5580 #define bfd_elf32_bfd_relax_section mn10300_elf_relax_section 5581 #define bfd_elf32_bfd_get_relocated_section_contents \ 5582 mn10300_elf_get_relocated_section_contents 5583 #define bfd_elf32_bfd_link_hash_table_create \ 5584 elf32_mn10300_link_hash_table_create 5585 #define bfd_elf32_bfd_link_hash_table_free \ 5586 elf32_mn10300_link_hash_table_free 5587 5588 #ifndef elf_symbol_leading_char 5589 #define elf_symbol_leading_char '_' 5590 #endif 5591 5592 /* So we can set bits in e_flags. */ 5593 #define elf_backend_final_write_processing \ 5594 _bfd_mn10300_elf_final_write_processing 5595 #define elf_backend_object_p _bfd_mn10300_elf_object_p 5596 5597 #define bfd_elf32_bfd_merge_private_bfd_data \ 5598 _bfd_mn10300_elf_merge_private_bfd_data 5599 5600 #define elf_backend_can_gc_sections 1 5601 #define elf_backend_create_dynamic_sections \ 5602 _bfd_mn10300_elf_create_dynamic_sections 5603 #define elf_backend_adjust_dynamic_symbol \ 5604 _bfd_mn10300_elf_adjust_dynamic_symbol 5605 #define elf_backend_size_dynamic_sections \ 5606 _bfd_mn10300_elf_size_dynamic_sections 5607 #define elf_backend_omit_section_dynsym \ 5608 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) 5609 #define elf_backend_finish_dynamic_symbol \ 5610 _bfd_mn10300_elf_finish_dynamic_symbol 5611 #define elf_backend_finish_dynamic_sections \ 5612 _bfd_mn10300_elf_finish_dynamic_sections 5613 #define elf_backend_copy_indirect_symbol \ 5614 _bfd_mn10300_copy_indirect_symbol 5615 #define elf_backend_reloc_type_class \ 5616 _bfd_mn10300_elf_reloc_type_class 5617 5618 #define elf_backend_want_got_plt 1 5619 #define elf_backend_plt_readonly 1 5620 #define elf_backend_want_plt_sym 0 5621 #define elf_backend_got_header_size 12 5622 5623 #include "elf32-target.h" 5624