1 /* PowerPC-specific support for 32-bit ELF 2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 3 2004 Free Software Foundation, Inc. 4 Written by Ian Lance Taylor, Cygnus Support. 5 6 This file is part of BFD, the Binary File Descriptor library. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 2 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the 20 Free Software Foundation, Inc., 59 Temple Place - Suite 330, 21 Boston, MA 02111-1307, USA. */ 22 23 /* This file is based on a preliminary PowerPC ELF ABI. The 24 information may not match the final PowerPC ELF ABI. It includes 25 suggestions from the in-progress Embedded PowerPC ABI, and that 26 information may also not match. */ 27 28 #include "bfd.h" 29 #include "sysdep.h" 30 #include "bfdlink.h" 31 #include "libbfd.h" 32 #include "elf-bfd.h" 33 #include "elf/ppc.h" 34 #include "elf32-ppc.h" 35 36 /* RELA relocations are used here. */ 37 38 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc 39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 40 static bfd_reloc_status_type ppc_elf_unhandled_reloc 41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 42 43 /* Branch prediction bit for branch taken relocs. */ 44 #define BRANCH_PREDICT_BIT 0x200000 45 /* Mask to set RA in memory instructions. */ 46 #define RA_REGISTER_MASK 0x001f0000 47 /* Value to shift register by to insert RA. */ 48 #define RA_REGISTER_SHIFT 16 49 50 /* The name of the dynamic interpreter. This is put in the .interp 51 section. */ 52 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 53 54 /* The size in bytes of an entry in the procedure linkage table. */ 55 #define PLT_ENTRY_SIZE 12 56 /* The initial size of the plt reserved for the dynamic linker. */ 57 #define PLT_INITIAL_ENTRY_SIZE 72 58 /* The size of the gap between entries in the PLT. */ 59 #define PLT_SLOT_SIZE 8 60 /* The number of single-slot PLT entries (the rest use two slots). */ 61 #define PLT_NUM_SINGLE_ENTRIES 8192 62 63 /* Some nop instructions. */ 64 #define NOP 0x60000000 65 #define CROR_151515 0x4def7b82 66 #define CROR_313131 0x4ffffb82 67 68 /* Offset of tp and dtp pointers from start of TLS block. */ 69 #define TP_OFFSET 0x7000 70 #define DTP_OFFSET 0x8000 71 72 73 /* Enumeration to specify the special section. */ 74 enum elf_linker_section_enum 75 { 76 LINKER_SECTION_SDATA, 77 LINKER_SECTION_SDATA2 78 }; 79 80 /* Sections created by the linker. */ 81 82 typedef struct elf_linker_section 83 { 84 /* pointer to the section */ 85 asection *section; 86 /* pointer to the relocations needed for this section */ 87 asection *rel_section; 88 /* pointer to the created symbol hash value */ 89 struct elf_link_hash_entry *sym_hash; 90 /* offset of symbol from beginning of section */ 91 bfd_vma sym_offset; 92 } elf_linker_section_t; 93 94 /* Linked list of allocated pointer entries. This hangs off of the 95 symbol lists, and provides allows us to return different pointers, 96 based on different addend's. */ 97 98 typedef struct elf_linker_section_pointers 99 { 100 /* next allocated pointer for this symbol */ 101 struct elf_linker_section_pointers *next; 102 /* offset of pointer from beginning of section */ 103 bfd_vma offset; 104 /* addend used */ 105 bfd_vma addend; 106 /* which linker section this is */ 107 elf_linker_section_t *lsect; 108 /* whether address was written yet */ 109 bfd_boolean written_address_p; 110 } elf_linker_section_pointers_t; 111 112 struct ppc_elf_obj_tdata 113 { 114 struct elf_obj_tdata elf; 115 116 /* A mapping from local symbols to offsets into the various linker 117 sections added. This is index by the symbol index. */ 118 elf_linker_section_pointers_t **linker_section_pointers; 119 }; 120 121 #define ppc_elf_tdata(bfd) \ 122 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any) 123 124 #define elf_local_ptr_offsets(bfd) \ 125 (ppc_elf_tdata (bfd)->linker_section_pointers) 126 127 /* Override the generic function because we store some extras. */ 128 129 static bfd_boolean 130 ppc_elf_mkobject (bfd *abfd) 131 { 132 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata); 133 abfd->tdata.any = bfd_zalloc (abfd, amt); 134 if (abfd->tdata.any == NULL) 135 return FALSE; 136 return TRUE; 137 } 138 139 /* The PPC linker needs to keep track of the number of relocs that it 140 decides to copy as dynamic relocs in check_relocs for each symbol. 141 This is so that it can later discard them if they are found to be 142 unnecessary. We store the information in a field extending the 143 regular ELF linker hash table. */ 144 145 struct ppc_elf_dyn_relocs 146 { 147 struct ppc_elf_dyn_relocs *next; 148 149 /* The input section of the reloc. */ 150 asection *sec; 151 152 /* Total number of relocs copied for the input section. */ 153 bfd_size_type count; 154 155 /* Number of pc-relative relocs copied for the input section. */ 156 bfd_size_type pc_count; 157 }; 158 159 /* PPC ELF linker hash entry. */ 160 161 struct ppc_elf_link_hash_entry 162 { 163 struct elf_link_hash_entry elf; 164 165 /* If this symbol is used in the linker created sections, the processor 166 specific backend uses this field to map the field into the offset 167 from the beginning of the section. */ 168 elf_linker_section_pointers_t *linker_section_pointer; 169 170 /* Track dynamic relocs copied for this symbol. */ 171 struct ppc_elf_dyn_relocs *dyn_relocs; 172 173 /* Contexts in which symbol is used in the GOT (or TOC). 174 TLS_GD .. TLS_TLS bits are or'd into the mask as the 175 corresponding relocs are encountered during check_relocs. 176 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to 177 indicate the corresponding GOT entry type is not needed. */ 178 #define TLS_GD 1 /* GD reloc. */ 179 #define TLS_LD 2 /* LD reloc. */ 180 #define TLS_TPREL 4 /* TPREL reloc, => IE. */ 181 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ 182 #define TLS_TLS 16 /* Any TLS reloc. */ 183 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */ 184 char tls_mask; 185 }; 186 187 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) 188 189 /* PPC ELF linker hash table. */ 190 191 struct ppc_elf_link_hash_table 192 { 193 struct elf_link_hash_table elf; 194 195 /* Short-cuts to get to dynamic linker sections. */ 196 asection *got; 197 asection *relgot; 198 asection *plt; 199 asection *relplt; 200 asection *dynbss; 201 asection *relbss; 202 asection *dynsbss; 203 asection *relsbss; 204 elf_linker_section_t *sdata; 205 elf_linker_section_t *sdata2; 206 asection *sbss; 207 208 /* Shortcut to .__tls_get_addr. */ 209 struct elf_link_hash_entry *tls_get_addr; 210 211 /* TLS local dynamic got entry handling. */ 212 union { 213 bfd_signed_vma refcount; 214 bfd_vma offset; 215 } tlsld_got; 216 217 /* Small local sym to section mapping cache. */ 218 struct sym_sec_cache sym_sec; 219 }; 220 221 /* Get the PPC ELF linker hash table from a link_info structure. */ 222 223 #define ppc_elf_hash_table(p) \ 224 ((struct ppc_elf_link_hash_table *) (p)->hash) 225 226 /* Create an entry in a PPC ELF linker hash table. */ 227 228 static struct bfd_hash_entry * 229 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 230 struct bfd_hash_table *table, 231 const char *string) 232 { 233 /* Allocate the structure if it has not already been allocated by a 234 subclass. */ 235 if (entry == NULL) 236 { 237 entry = bfd_hash_allocate (table, 238 sizeof (struct ppc_elf_link_hash_entry)); 239 if (entry == NULL) 240 return entry; 241 } 242 243 /* Call the allocation method of the superclass. */ 244 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 245 if (entry != NULL) 246 { 247 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL; 248 ppc_elf_hash_entry (entry)->dyn_relocs = NULL; 249 ppc_elf_hash_entry (entry)->tls_mask = 0; 250 } 251 252 return entry; 253 } 254 255 /* Create a PPC ELF linker hash table. */ 256 257 static struct bfd_link_hash_table * 258 ppc_elf_link_hash_table_create (bfd *abfd) 259 { 260 struct ppc_elf_link_hash_table *ret; 261 262 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table)); 263 if (ret == NULL) 264 return NULL; 265 266 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, 267 ppc_elf_link_hash_newfunc)) 268 { 269 free (ret); 270 return NULL; 271 } 272 273 return &ret->elf.root; 274 } 275 276 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 277 copying dynamic variables from a shared lib into an app's dynbss 278 section, and instead use a dynamic relocation to point into the 279 shared lib. */ 280 #define ELIMINATE_COPY_RELOCS 1 281 282 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 283 284 static void 285 ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed, 286 struct elf_link_hash_entry *dir, 287 struct elf_link_hash_entry *ind) 288 { 289 struct ppc_elf_link_hash_entry *edir, *eind; 290 291 edir = (struct ppc_elf_link_hash_entry *) dir; 292 eind = (struct ppc_elf_link_hash_entry *) ind; 293 294 if (eind->dyn_relocs != NULL) 295 { 296 if (edir->dyn_relocs != NULL) 297 { 298 struct ppc_elf_dyn_relocs **pp; 299 struct ppc_elf_dyn_relocs *p; 300 301 if (ind->root.type == bfd_link_hash_indirect) 302 abort (); 303 304 /* Add reloc counts against the weak sym to the strong sym 305 list. Merge any entries against the same section. */ 306 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 307 { 308 struct ppc_elf_dyn_relocs *q; 309 310 for (q = edir->dyn_relocs; q != NULL; q = q->next) 311 if (q->sec == p->sec) 312 { 313 q->pc_count += p->pc_count; 314 q->count += p->count; 315 *pp = p->next; 316 break; 317 } 318 if (q == NULL) 319 pp = &p->next; 320 } 321 *pp = edir->dyn_relocs; 322 } 323 324 edir->dyn_relocs = eind->dyn_relocs; 325 eind->dyn_relocs = NULL; 326 } 327 328 edir->tls_mask |= eind->tls_mask; 329 330 if (ELIMINATE_COPY_RELOCS 331 && ind->root.type != bfd_link_hash_indirect 332 && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) 333 /* If called to transfer flags for a weakdef during processing 334 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF. 335 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 336 dir->elf_link_hash_flags |= 337 (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC 338 | ELF_LINK_HASH_REF_REGULAR 339 | ELF_LINK_HASH_REF_REGULAR_NONWEAK 340 | ELF_LINK_HASH_NEEDS_PLT)); 341 else 342 _bfd_elf_link_hash_copy_indirect (bed, dir, ind); 343 } 344 345 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max]; 346 347 static reloc_howto_type ppc_elf_howto_raw[] = { 348 /* This reloc does nothing. */ 349 HOWTO (R_PPC_NONE, /* type */ 350 0, /* rightshift */ 351 2, /* size (0 = byte, 1 = short, 2 = long) */ 352 32, /* bitsize */ 353 FALSE, /* pc_relative */ 354 0, /* bitpos */ 355 complain_overflow_bitfield, /* complain_on_overflow */ 356 bfd_elf_generic_reloc, /* special_function */ 357 "R_PPC_NONE", /* name */ 358 FALSE, /* partial_inplace */ 359 0, /* src_mask */ 360 0, /* dst_mask */ 361 FALSE), /* pcrel_offset */ 362 363 /* A standard 32 bit relocation. */ 364 HOWTO (R_PPC_ADDR32, /* type */ 365 0, /* rightshift */ 366 2, /* size (0 = byte, 1 = short, 2 = long) */ 367 32, /* bitsize */ 368 FALSE, /* pc_relative */ 369 0, /* bitpos */ 370 complain_overflow_bitfield, /* complain_on_overflow */ 371 bfd_elf_generic_reloc, /* special_function */ 372 "R_PPC_ADDR32", /* name */ 373 FALSE, /* partial_inplace */ 374 0, /* src_mask */ 375 0xffffffff, /* dst_mask */ 376 FALSE), /* pcrel_offset */ 377 378 /* An absolute 26 bit branch; the lower two bits must be zero. 379 FIXME: we don't check that, we just clear them. */ 380 HOWTO (R_PPC_ADDR24, /* type */ 381 0, /* rightshift */ 382 2, /* size (0 = byte, 1 = short, 2 = long) */ 383 26, /* bitsize */ 384 FALSE, /* pc_relative */ 385 0, /* bitpos */ 386 complain_overflow_bitfield, /* complain_on_overflow */ 387 bfd_elf_generic_reloc, /* special_function */ 388 "R_PPC_ADDR24", /* name */ 389 FALSE, /* partial_inplace */ 390 0, /* src_mask */ 391 0x3fffffc, /* dst_mask */ 392 FALSE), /* pcrel_offset */ 393 394 /* A standard 16 bit relocation. */ 395 HOWTO (R_PPC_ADDR16, /* type */ 396 0, /* rightshift */ 397 1, /* size (0 = byte, 1 = short, 2 = long) */ 398 16, /* bitsize */ 399 FALSE, /* pc_relative */ 400 0, /* bitpos */ 401 complain_overflow_bitfield, /* complain_on_overflow */ 402 bfd_elf_generic_reloc, /* special_function */ 403 "R_PPC_ADDR16", /* name */ 404 FALSE, /* partial_inplace */ 405 0, /* src_mask */ 406 0xffff, /* dst_mask */ 407 FALSE), /* pcrel_offset */ 408 409 /* A 16 bit relocation without overflow. */ 410 HOWTO (R_PPC_ADDR16_LO, /* type */ 411 0, /* rightshift */ 412 1, /* size (0 = byte, 1 = short, 2 = long) */ 413 16, /* bitsize */ 414 FALSE, /* pc_relative */ 415 0, /* bitpos */ 416 complain_overflow_dont,/* complain_on_overflow */ 417 bfd_elf_generic_reloc, /* special_function */ 418 "R_PPC_ADDR16_LO", /* name */ 419 FALSE, /* partial_inplace */ 420 0, /* src_mask */ 421 0xffff, /* dst_mask */ 422 FALSE), /* pcrel_offset */ 423 424 /* The high order 16 bits of an address. */ 425 HOWTO (R_PPC_ADDR16_HI, /* type */ 426 16, /* rightshift */ 427 1, /* size (0 = byte, 1 = short, 2 = long) */ 428 16, /* bitsize */ 429 FALSE, /* pc_relative */ 430 0, /* bitpos */ 431 complain_overflow_dont, /* complain_on_overflow */ 432 bfd_elf_generic_reloc, /* special_function */ 433 "R_PPC_ADDR16_HI", /* name */ 434 FALSE, /* partial_inplace */ 435 0, /* src_mask */ 436 0xffff, /* dst_mask */ 437 FALSE), /* pcrel_offset */ 438 439 /* The high order 16 bits of an address, plus 1 if the contents of 440 the low 16 bits, treated as a signed number, is negative. */ 441 HOWTO (R_PPC_ADDR16_HA, /* type */ 442 16, /* rightshift */ 443 1, /* size (0 = byte, 1 = short, 2 = long) */ 444 16, /* bitsize */ 445 FALSE, /* pc_relative */ 446 0, /* bitpos */ 447 complain_overflow_dont, /* complain_on_overflow */ 448 ppc_elf_addr16_ha_reloc, /* special_function */ 449 "R_PPC_ADDR16_HA", /* name */ 450 FALSE, /* partial_inplace */ 451 0, /* src_mask */ 452 0xffff, /* dst_mask */ 453 FALSE), /* pcrel_offset */ 454 455 /* An absolute 16 bit branch; the lower two bits must be zero. 456 FIXME: we don't check that, we just clear them. */ 457 HOWTO (R_PPC_ADDR14, /* type */ 458 0, /* rightshift */ 459 2, /* size (0 = byte, 1 = short, 2 = long) */ 460 16, /* bitsize */ 461 FALSE, /* pc_relative */ 462 0, /* bitpos */ 463 complain_overflow_bitfield, /* complain_on_overflow */ 464 bfd_elf_generic_reloc, /* special_function */ 465 "R_PPC_ADDR14", /* name */ 466 FALSE, /* partial_inplace */ 467 0, /* src_mask */ 468 0xfffc, /* dst_mask */ 469 FALSE), /* pcrel_offset */ 470 471 /* An absolute 16 bit branch, for which bit 10 should be set to 472 indicate that the branch is expected to be taken. The lower two 473 bits must be zero. */ 474 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */ 475 0, /* rightshift */ 476 2, /* size (0 = byte, 1 = short, 2 = long) */ 477 16, /* bitsize */ 478 FALSE, /* pc_relative */ 479 0, /* bitpos */ 480 complain_overflow_bitfield, /* complain_on_overflow */ 481 bfd_elf_generic_reloc, /* special_function */ 482 "R_PPC_ADDR14_BRTAKEN",/* name */ 483 FALSE, /* partial_inplace */ 484 0, /* src_mask */ 485 0xfffc, /* dst_mask */ 486 FALSE), /* pcrel_offset */ 487 488 /* An absolute 16 bit branch, for which bit 10 should be set to 489 indicate that the branch is not expected to be taken. The lower 490 two bits must be zero. */ 491 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */ 492 0, /* rightshift */ 493 2, /* size (0 = byte, 1 = short, 2 = long) */ 494 16, /* bitsize */ 495 FALSE, /* pc_relative */ 496 0, /* bitpos */ 497 complain_overflow_bitfield, /* complain_on_overflow */ 498 bfd_elf_generic_reloc, /* special_function */ 499 "R_PPC_ADDR14_BRNTAKEN",/* name */ 500 FALSE, /* partial_inplace */ 501 0, /* src_mask */ 502 0xfffc, /* dst_mask */ 503 FALSE), /* pcrel_offset */ 504 505 /* A relative 26 bit branch; the lower two bits must be zero. */ 506 HOWTO (R_PPC_REL24, /* type */ 507 0, /* rightshift */ 508 2, /* size (0 = byte, 1 = short, 2 = long) */ 509 26, /* bitsize */ 510 TRUE, /* pc_relative */ 511 0, /* bitpos */ 512 complain_overflow_signed, /* complain_on_overflow */ 513 bfd_elf_generic_reloc, /* special_function */ 514 "R_PPC_REL24", /* name */ 515 FALSE, /* partial_inplace */ 516 0, /* src_mask */ 517 0x3fffffc, /* dst_mask */ 518 TRUE), /* pcrel_offset */ 519 520 /* A relative 16 bit branch; the lower two bits must be zero. */ 521 HOWTO (R_PPC_REL14, /* type */ 522 0, /* rightshift */ 523 2, /* size (0 = byte, 1 = short, 2 = long) */ 524 16, /* bitsize */ 525 TRUE, /* pc_relative */ 526 0, /* bitpos */ 527 complain_overflow_signed, /* complain_on_overflow */ 528 bfd_elf_generic_reloc, /* special_function */ 529 "R_PPC_REL14", /* name */ 530 FALSE, /* partial_inplace */ 531 0, /* src_mask */ 532 0xfffc, /* dst_mask */ 533 TRUE), /* pcrel_offset */ 534 535 /* A relative 16 bit branch. Bit 10 should be set to indicate that 536 the branch is expected to be taken. The lower two bits must be 537 zero. */ 538 HOWTO (R_PPC_REL14_BRTAKEN, /* type */ 539 0, /* rightshift */ 540 2, /* size (0 = byte, 1 = short, 2 = long) */ 541 16, /* bitsize */ 542 TRUE, /* pc_relative */ 543 0, /* bitpos */ 544 complain_overflow_signed, /* complain_on_overflow */ 545 bfd_elf_generic_reloc, /* special_function */ 546 "R_PPC_REL14_BRTAKEN", /* name */ 547 FALSE, /* partial_inplace */ 548 0, /* src_mask */ 549 0xfffc, /* dst_mask */ 550 TRUE), /* pcrel_offset */ 551 552 /* A relative 16 bit branch. Bit 10 should be set to indicate that 553 the branch is not expected to be taken. The lower two bits must 554 be zero. */ 555 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */ 556 0, /* rightshift */ 557 2, /* size (0 = byte, 1 = short, 2 = long) */ 558 16, /* bitsize */ 559 TRUE, /* pc_relative */ 560 0, /* bitpos */ 561 complain_overflow_signed, /* complain_on_overflow */ 562 bfd_elf_generic_reloc, /* special_function */ 563 "R_PPC_REL14_BRNTAKEN",/* name */ 564 FALSE, /* partial_inplace */ 565 0, /* src_mask */ 566 0xfffc, /* dst_mask */ 567 TRUE), /* pcrel_offset */ 568 569 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the 570 symbol. */ 571 HOWTO (R_PPC_GOT16, /* type */ 572 0, /* rightshift */ 573 1, /* size (0 = byte, 1 = short, 2 = long) */ 574 16, /* bitsize */ 575 FALSE, /* pc_relative */ 576 0, /* bitpos */ 577 complain_overflow_signed, /* complain_on_overflow */ 578 bfd_elf_generic_reloc, /* special_function */ 579 "R_PPC_GOT16", /* name */ 580 FALSE, /* partial_inplace */ 581 0, /* src_mask */ 582 0xffff, /* dst_mask */ 583 FALSE), /* pcrel_offset */ 584 585 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for 586 the symbol. */ 587 HOWTO (R_PPC_GOT16_LO, /* type */ 588 0, /* rightshift */ 589 1, /* size (0 = byte, 1 = short, 2 = long) */ 590 16, /* bitsize */ 591 FALSE, /* pc_relative */ 592 0, /* bitpos */ 593 complain_overflow_dont, /* complain_on_overflow */ 594 bfd_elf_generic_reloc, /* special_function */ 595 "R_PPC_GOT16_LO", /* name */ 596 FALSE, /* partial_inplace */ 597 0, /* src_mask */ 598 0xffff, /* dst_mask */ 599 FALSE), /* pcrel_offset */ 600 601 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for 602 the symbol. */ 603 HOWTO (R_PPC_GOT16_HI, /* type */ 604 16, /* rightshift */ 605 1, /* size (0 = byte, 1 = short, 2 = long) */ 606 16, /* bitsize */ 607 FALSE, /* pc_relative */ 608 0, /* bitpos */ 609 complain_overflow_bitfield, /* complain_on_overflow */ 610 bfd_elf_generic_reloc, /* special_function */ 611 "R_PPC_GOT16_HI", /* name */ 612 FALSE, /* partial_inplace */ 613 0, /* src_mask */ 614 0xffff, /* dst_mask */ 615 FALSE), /* pcrel_offset */ 616 617 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for 618 the symbol. */ 619 HOWTO (R_PPC_GOT16_HA, /* type */ 620 16, /* rightshift */ 621 1, /* size (0 = byte, 1 = short, 2 = long) */ 622 16, /* bitsize */ 623 FALSE, /* pc_relative */ 624 0, /* bitpos */ 625 complain_overflow_bitfield, /* complain_on_overflow */ 626 ppc_elf_addr16_ha_reloc, /* special_function */ 627 "R_PPC_GOT16_HA", /* name */ 628 FALSE, /* partial_inplace */ 629 0, /* src_mask */ 630 0xffff, /* dst_mask */ 631 FALSE), /* pcrel_offset */ 632 633 /* Like R_PPC_REL24, but referring to the procedure linkage table 634 entry for the symbol. */ 635 HOWTO (R_PPC_PLTREL24, /* type */ 636 0, /* rightshift */ 637 2, /* size (0 = byte, 1 = short, 2 = long) */ 638 26, /* bitsize */ 639 TRUE, /* pc_relative */ 640 0, /* bitpos */ 641 complain_overflow_signed, /* complain_on_overflow */ 642 bfd_elf_generic_reloc, /* special_function */ 643 "R_PPC_PLTREL24", /* name */ 644 FALSE, /* partial_inplace */ 645 0, /* src_mask */ 646 0x3fffffc, /* dst_mask */ 647 TRUE), /* pcrel_offset */ 648 649 /* This is used only by the dynamic linker. The symbol should exist 650 both in the object being run and in some shared library. The 651 dynamic linker copies the data addressed by the symbol from the 652 shared library into the object, because the object being 653 run has to have the data at some particular address. */ 654 HOWTO (R_PPC_COPY, /* type */ 655 0, /* rightshift */ 656 2, /* size (0 = byte, 1 = short, 2 = long) */ 657 32, /* bitsize */ 658 FALSE, /* pc_relative */ 659 0, /* bitpos */ 660 complain_overflow_bitfield, /* complain_on_overflow */ 661 bfd_elf_generic_reloc, /* special_function */ 662 "R_PPC_COPY", /* name */ 663 FALSE, /* partial_inplace */ 664 0, /* src_mask */ 665 0, /* dst_mask */ 666 FALSE), /* pcrel_offset */ 667 668 /* Like R_PPC_ADDR32, but used when setting global offset table 669 entries. */ 670 HOWTO (R_PPC_GLOB_DAT, /* type */ 671 0, /* rightshift */ 672 2, /* size (0 = byte, 1 = short, 2 = long) */ 673 32, /* bitsize */ 674 FALSE, /* pc_relative */ 675 0, /* bitpos */ 676 complain_overflow_bitfield, /* complain_on_overflow */ 677 bfd_elf_generic_reloc, /* special_function */ 678 "R_PPC_GLOB_DAT", /* name */ 679 FALSE, /* partial_inplace */ 680 0, /* src_mask */ 681 0xffffffff, /* dst_mask */ 682 FALSE), /* pcrel_offset */ 683 684 /* Marks a procedure linkage table entry for a symbol. */ 685 HOWTO (R_PPC_JMP_SLOT, /* type */ 686 0, /* rightshift */ 687 2, /* size (0 = byte, 1 = short, 2 = long) */ 688 32, /* bitsize */ 689 FALSE, /* pc_relative */ 690 0, /* bitpos */ 691 complain_overflow_bitfield, /* complain_on_overflow */ 692 bfd_elf_generic_reloc, /* special_function */ 693 "R_PPC_JMP_SLOT", /* name */ 694 FALSE, /* partial_inplace */ 695 0, /* src_mask */ 696 0, /* dst_mask */ 697 FALSE), /* pcrel_offset */ 698 699 /* Used only by the dynamic linker. When the object is run, this 700 longword is set to the load address of the object, plus the 701 addend. */ 702 HOWTO (R_PPC_RELATIVE, /* type */ 703 0, /* rightshift */ 704 2, /* size (0 = byte, 1 = short, 2 = long) */ 705 32, /* bitsize */ 706 FALSE, /* pc_relative */ 707 0, /* bitpos */ 708 complain_overflow_bitfield, /* complain_on_overflow */ 709 bfd_elf_generic_reloc, /* special_function */ 710 "R_PPC_RELATIVE", /* name */ 711 FALSE, /* partial_inplace */ 712 0, /* src_mask */ 713 0xffffffff, /* dst_mask */ 714 FALSE), /* pcrel_offset */ 715 716 /* Like R_PPC_REL24, but uses the value of the symbol within the 717 object rather than the final value. Normally used for 718 _GLOBAL_OFFSET_TABLE_. */ mips_elf_assign_gp(bfd * output_bfd,bfd_vma * pgp)719 HOWTO (R_PPC_LOCAL24PC, /* type */ 720 0, /* rightshift */ 721 2, /* size (0 = byte, 1 = short, 2 = long) */ 722 26, /* bitsize */ 723 TRUE, /* pc_relative */ 724 0, /* bitpos */ 725 complain_overflow_signed, /* complain_on_overflow */ 726 bfd_elf_generic_reloc, /* special_function */ 727 "R_PPC_LOCAL24PC", /* name */ 728 FALSE, /* partial_inplace */ 729 0, /* src_mask */ 730 0x3fffffc, /* dst_mask */ 731 TRUE), /* pcrel_offset */ 732 733 /* Like R_PPC_ADDR32, but may be unaligned. */ 734 HOWTO (R_PPC_UADDR32, /* type */ 735 0, /* rightshift */ 736 2, /* size (0 = byte, 1 = short, 2 = long) */ 737 32, /* bitsize */ 738 FALSE, /* pc_relative */ 739 0, /* bitpos */ 740 complain_overflow_bitfield, /* complain_on_overflow */ 741 bfd_elf_generic_reloc, /* special_function */ 742 "R_PPC_UADDR32", /* name */ 743 FALSE, /* partial_inplace */ 744 0, /* src_mask */ 745 0xffffffff, /* dst_mask */ 746 FALSE), /* pcrel_offset */ 747 748 /* Like R_PPC_ADDR16, but may be unaligned. */ 749 HOWTO (R_PPC_UADDR16, /* type */ 750 0, /* rightshift */ 751 1, /* size (0 = byte, 1 = short, 2 = long) */ 752 16, /* bitsize */ 753 FALSE, /* pc_relative */ 754 0, /* bitpos */ 755 complain_overflow_bitfield, /* complain_on_overflow */ 756 bfd_elf_generic_reloc, /* special_function */ 757 "R_PPC_UADDR16", /* name */ 758 FALSE, /* partial_inplace */ 759 0, /* src_mask */ 760 0xffff, /* dst_mask */ 761 FALSE), /* pcrel_offset */ 762 763 /* 32-bit PC relative */ 764 HOWTO (R_PPC_REL32, /* type */ 765 0, /* rightshift */ 766 2, /* size (0 = byte, 1 = short, 2 = long) */ 767 32, /* bitsize */ 768 TRUE, /* pc_relative */ 769 0, /* bitpos */ 770 complain_overflow_bitfield, /* complain_on_overflow */ 771 bfd_elf_generic_reloc, /* special_function */ 772 "R_PPC_REL32", /* name */ 773 FALSE, /* partial_inplace */ 774 0, /* src_mask */ 775 0xffffffff, /* dst_mask */ 776 TRUE), /* pcrel_offset */ 777 778 /* 32-bit relocation to the symbol's procedure linkage table. 779 FIXME: not supported. */ 780 HOWTO (R_PPC_PLT32, /* type */ 781 0, /* rightshift */ 782 2, /* size (0 = byte, 1 = short, 2 = long) */ 783 32, /* bitsize */ 784 FALSE, /* pc_relative */ 785 0, /* bitpos */ 786 complain_overflow_bitfield, /* complain_on_overflow */ 787 bfd_elf_generic_reloc, /* special_function */ 788 "R_PPC_PLT32", /* name */ 789 FALSE, /* partial_inplace */ 790 0, /* src_mask */ 791 0, /* dst_mask */ 792 FALSE), /* pcrel_offset */ 793 794 /* 32-bit PC relative relocation to the symbol's procedure linkage table. 795 FIXME: not supported. */ 796 HOWTO (R_PPC_PLTREL32, /* type */ 797 0, /* rightshift */ 798 2, /* size (0 = byte, 1 = short, 2 = long) */ 799 32, /* bitsize */ 800 TRUE, /* pc_relative */ 801 0, /* bitpos */ 802 complain_overflow_bitfield, /* complain_on_overflow */ 803 bfd_elf_generic_reloc, /* special_function */ 804 "R_PPC_PLTREL32", /* name */ 805 FALSE, /* partial_inplace */ 806 0, /* src_mask */ 807 0, /* dst_mask */ 808 TRUE), /* pcrel_offset */ 809 810 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for 811 the symbol. */ 812 HOWTO (R_PPC_PLT16_LO, /* type */ 813 0, /* rightshift */ 814 1, /* size (0 = byte, 1 = short, 2 = long) */ 815 16, /* bitsize */ 816 FALSE, /* pc_relative */ 817 0, /* bitpos */ 818 complain_overflow_dont, /* complain_on_overflow */ 819 bfd_elf_generic_reloc, /* special_function */ 820 "R_PPC_PLT16_LO", /* name */ 821 FALSE, /* partial_inplace */ 822 0, /* src_mask */ 823 0xffff, /* dst_mask */ 824 FALSE), /* pcrel_offset */ 825 826 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for 827 the symbol. */ 828 HOWTO (R_PPC_PLT16_HI, /* type */ 829 16, /* rightshift */ 830 1, /* size (0 = byte, 1 = short, 2 = long) */ 831 16, /* bitsize */ 832 FALSE, /* pc_relative */ 833 0, /* bitpos */ 834 complain_overflow_bitfield, /* complain_on_overflow */ 835 bfd_elf_generic_reloc, /* special_function */ 836 "R_PPC_PLT16_HI", /* name */ 837 FALSE, /* partial_inplace */ 838 0, /* src_mask */ 839 0xffff, /* dst_mask */ 840 FALSE), /* pcrel_offset */ 841 842 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for 843 the symbol. */ 844 HOWTO (R_PPC_PLT16_HA, /* type */ 845 16, /* rightshift */ 846 1, /* size (0 = byte, 1 = short, 2 = long) */ 847 16, /* bitsize */ 848 FALSE, /* pc_relative */ 849 0, /* bitpos */ 850 complain_overflow_bitfield, /* complain_on_overflow */ 851 ppc_elf_addr16_ha_reloc, /* special_function */ 852 "R_PPC_PLT16_HA", /* name */ 853 FALSE, /* partial_inplace */ 854 0, /* src_mask */ 855 0xffff, /* dst_mask */ 856 FALSE), /* pcrel_offset */ 857 858 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with 859 small data items. */ 860 HOWTO (R_PPC_SDAREL16, /* type */ 861 0, /* rightshift */ 862 1, /* size (0 = byte, 1 = short, 2 = long) */ 863 16, /* bitsize */ 864 FALSE, /* pc_relative */ 865 0, /* bitpos */ 866 complain_overflow_signed, /* complain_on_overflow */ 867 bfd_elf_generic_reloc, /* special_function */ 868 "R_PPC_SDAREL16", /* name */ 869 FALSE, /* partial_inplace */ 870 0, /* src_mask */ 871 0xffff, /* dst_mask */ 872 FALSE), /* pcrel_offset */ 873 874 /* 16-bit section relative relocation. */ 875 HOWTO (R_PPC_SECTOFF, /* type */ 876 0, /* rightshift */ 877 1, /* size (0 = byte, 1 = short, 2 = long) */ 878 16, /* bitsize */ 879 FALSE, /* pc_relative */ 880 0, /* bitpos */ 881 complain_overflow_bitfield, /* complain_on_overflow */ 882 bfd_elf_generic_reloc, /* special_function */ 883 "R_PPC_SECTOFF", /* name */ 884 FALSE, /* partial_inplace */ 885 0, /* src_mask */ 886 0xffff, /* dst_mask */ 887 FALSE), /* pcrel_offset */ 888 889 /* 16-bit lower half section relative relocation. */ 890 HOWTO (R_PPC_SECTOFF_LO, /* type */ 891 0, /* rightshift */ 892 1, /* size (0 = byte, 1 = short, 2 = long) */ 893 16, /* bitsize */ 894 FALSE, /* pc_relative */ 895 0, /* bitpos */ 896 complain_overflow_dont, /* complain_on_overflow */ 897 bfd_elf_generic_reloc, /* special_function */ 898 "R_PPC_SECTOFF_LO", /* name */ 899 FALSE, /* partial_inplace */ 900 0, /* src_mask */ 901 0xffff, /* dst_mask */ 902 FALSE), /* pcrel_offset */ 903 904 /* 16-bit upper half section relative relocation. */ 905 HOWTO (R_PPC_SECTOFF_HI, /* type */ 906 16, /* rightshift */ 907 1, /* size (0 = byte, 1 = short, 2 = long) */ 908 16, /* bitsize */ 909 FALSE, /* pc_relative */ 910 0, /* bitpos */ 911 complain_overflow_bitfield, /* complain_on_overflow */ 912 bfd_elf_generic_reloc, /* special_function */ 913 "R_PPC_SECTOFF_HI", /* name */ 914 FALSE, /* partial_inplace */ 915 0, /* src_mask */ 916 0xffff, /* dst_mask */ 917 FALSE), /* pcrel_offset */ 918 919 /* 16-bit upper half adjusted section relative relocation. */ 920 HOWTO (R_PPC_SECTOFF_HA, /* type */ 921 16, /* rightshift */ 922 1, /* size (0 = byte, 1 = short, 2 = long) */ 923 16, /* bitsize */ 924 FALSE, /* pc_relative */ 925 0, /* bitpos */ 926 complain_overflow_bitfield, /* complain_on_overflow */ 927 ppc_elf_addr16_ha_reloc, /* special_function */ 928 "R_PPC_SECTOFF_HA", /* name */ 929 FALSE, /* partial_inplace */ 930 0, /* src_mask */ 931 0xffff, /* dst_mask */ 932 FALSE), /* pcrel_offset */ 933 934 /* Marker reloc for TLS. */ 935 HOWTO (R_PPC_TLS, 936 0, /* rightshift */ 937 2, /* size (0 = byte, 1 = short, 2 = long) */ 938 32, /* bitsize */ 939 FALSE, /* pc_relative */ 940 0, /* bitpos */ 941 complain_overflow_dont, /* complain_on_overflow */ 942 bfd_elf_generic_reloc, /* special_function */ 943 "R_PPC_TLS", /* name */ 944 FALSE, /* partial_inplace */ 945 0, /* src_mask */ 946 0, /* dst_mask */ 947 FALSE), /* pcrel_offset */ 948 949 /* Computes the load module index of the load module that contains the 950 definition of its TLS sym. */ 951 HOWTO (R_PPC_DTPMOD32, 952 0, /* rightshift */ 953 2, /* size (0 = byte, 1 = short, 2 = long) */ 954 32, /* bitsize */ 955 FALSE, /* pc_relative */ 956 0, /* bitpos */ 957 complain_overflow_dont, /* complain_on_overflow */ 958 ppc_elf_unhandled_reloc, /* special_function */ 959 "R_PPC_DTPMOD32", /* name */ 960 FALSE, /* partial_inplace */ 961 0, /* src_mask */ 962 0xffffffff, /* dst_mask */ 963 FALSE), /* pcrel_offset */ 964 965 /* Computes a dtv-relative displacement, the difference between the value 966 of sym+add and the base address of the thread-local storage block that 967 contains the definition of sym, minus 0x8000. */ 968 HOWTO (R_PPC_DTPREL32, 969 0, /* rightshift */ 970 2, /* size (0 = byte, 1 = short, 2 = long) */ 971 32, /* bitsize */ 972 FALSE, /* pc_relative */ 973 0, /* bitpos */ 974 complain_overflow_dont, /* complain_on_overflow */ 975 ppc_elf_unhandled_reloc, /* special_function */ 976 "R_PPC_DTPREL32", /* name */ 977 FALSE, /* partial_inplace */ 978 0, /* src_mask */ 979 0xffffffff, /* dst_mask */ 980 FALSE), /* pcrel_offset */ 981 982 /* A 16 bit dtprel reloc. */ 983 HOWTO (R_PPC_DTPREL16, 984 0, /* rightshift */ 985 1, /* size (0 = byte, 1 = short, 2 = long) */ 986 16, /* bitsize */ 987 FALSE, /* pc_relative */ 988 0, /* bitpos */ 989 complain_overflow_signed, /* complain_on_overflow */ 990 ppc_elf_unhandled_reloc, /* special_function */ 991 "R_PPC_DTPREL16", /* name */ 992 FALSE, /* partial_inplace */ 993 0, /* src_mask */ 994 0xffff, /* dst_mask */ 995 FALSE), /* pcrel_offset */ 996 997 /* Like DTPREL16, but no overflow. */ 998 HOWTO (R_PPC_DTPREL16_LO, 999 0, /* rightshift */ 1000 1, /* size (0 = byte, 1 = short, 2 = long) */ 1001 16, /* bitsize */ 1002 FALSE, /* pc_relative */ 1003 0, /* bitpos */ 1004 complain_overflow_dont, /* complain_on_overflow */ 1005 ppc_elf_unhandled_reloc, /* special_function */ 1006 "R_PPC_DTPREL16_LO", /* name */ 1007 FALSE, /* partial_inplace */ 1008 0, /* src_mask */ 1009 0xffff, /* dst_mask */ 1010 FALSE), /* pcrel_offset */ 1011 1012 /* Like DTPREL16_LO, but next higher group of 16 bits. */ 1013 HOWTO (R_PPC_DTPREL16_HI, 1014 16, /* rightshift */ 1015 1, /* size (0 = byte, 1 = short, 2 = long) */ 1016 16, /* bitsize */ 1017 FALSE, /* pc_relative */ 1018 0, /* bitpos */ 1019 complain_overflow_dont, /* complain_on_overflow */ 1020 ppc_elf_unhandled_reloc, /* special_function */ 1021 "R_PPC_DTPREL16_HI", /* name */ 1022 FALSE, /* partial_inplace */ 1023 0, /* src_mask */ 1024 0xffff, /* dst_mask */ 1025 FALSE), /* pcrel_offset */ 1026 1027 /* Like DTPREL16_HI, but adjust for low 16 bits. */ 1028 HOWTO (R_PPC_DTPREL16_HA, 1029 16, /* rightshift */ 1030 1, /* size (0 = byte, 1 = short, 2 = long) */ 1031 16, /* bitsize */ 1032 FALSE, /* pc_relative */ 1033 0, /* bitpos */ 1034 complain_overflow_dont, /* complain_on_overflow */ 1035 ppc_elf_unhandled_reloc, /* special_function */ 1036 "R_PPC_DTPREL16_HA", /* name */ 1037 FALSE, /* partial_inplace */ 1038 0, /* src_mask */ 1039 0xffff, /* dst_mask */ 1040 FALSE), /* pcrel_offset */ 1041 1042 /* Computes a tp-relative displacement, the difference between the value of 1043 sym+add and the value of the thread pointer (r13). */ 1044 HOWTO (R_PPC_TPREL32, 1045 0, /* rightshift */ 1046 2, /* size (0 = byte, 1 = short, 2 = long) */ 1047 32, /* bitsize */ 1048 FALSE, /* pc_relative */ 1049 0, /* bitpos */ 1050 complain_overflow_dont, /* complain_on_overflow */ 1051 ppc_elf_unhandled_reloc, /* special_function */ 1052 "R_PPC_TPREL32", /* name */ 1053 FALSE, /* partial_inplace */ 1054 0, /* src_mask */ 1055 0xffffffff, /* dst_mask */ 1056 FALSE), /* pcrel_offset */ 1057 1058 /* A 16 bit tprel reloc. */ 1059 HOWTO (R_PPC_TPREL16, 1060 0, /* rightshift */ 1061 1, /* size (0 = byte, 1 = short, 2 = long) */ 1062 16, /* bitsize */ 1063 FALSE, /* pc_relative */ 1064 0, /* bitpos */ 1065 complain_overflow_signed, /* complain_on_overflow */ 1066 ppc_elf_unhandled_reloc, /* special_function */ 1067 "R_PPC_TPREL16", /* name */ 1068 FALSE, /* partial_inplace */ 1069 0, /* src_mask */ 1070 0xffff, /* dst_mask */ 1071 FALSE), /* pcrel_offset */ 1072 1073 /* Like TPREL16, but no overflow. */ 1074 HOWTO (R_PPC_TPREL16_LO, 1075 0, /* rightshift */ 1076 1, /* size (0 = byte, 1 = short, 2 = long) */ 1077 16, /* bitsize */ 1078 FALSE, /* pc_relative */ 1079 0, /* bitpos */ 1080 complain_overflow_dont, /* complain_on_overflow */ 1081 ppc_elf_unhandled_reloc, /* special_function */ 1082 "R_PPC_TPREL16_LO", /* name */ 1083 FALSE, /* partial_inplace */ 1084 0, /* src_mask */ 1085 0xffff, /* dst_mask */ 1086 FALSE), /* pcrel_offset */ 1087 1088 /* Like TPREL16_LO, but next higher group of 16 bits. */ 1089 HOWTO (R_PPC_TPREL16_HI, 1090 16, /* rightshift */ 1091 1, /* size (0 = byte, 1 = short, 2 = long) */ 1092 16, /* bitsize */ 1093 FALSE, /* pc_relative */ 1094 0, /* bitpos */ 1095 complain_overflow_dont, /* complain_on_overflow */ 1096 ppc_elf_unhandled_reloc, /* special_function */ 1097 "R_PPC_TPREL16_HI", /* name */ 1098 FALSE, /* partial_inplace */ 1099 0, /* src_mask */ 1100 0xffff, /* dst_mask */ 1101 FALSE), /* pcrel_offset */ 1102 1103 /* Like TPREL16_HI, but adjust for low 16 bits. */ 1104 HOWTO (R_PPC_TPREL16_HA, 1105 16, /* rightshift */ 1106 1, /* size (0 = byte, 1 = short, 2 = long) */ 1107 16, /* bitsize */ 1108 FALSE, /* pc_relative */ 1109 0, /* bitpos */ 1110 complain_overflow_dont, /* complain_on_overflow */ 1111 ppc_elf_unhandled_reloc, /* special_function */ 1112 "R_PPC_TPREL16_HA", /* name */ 1113 FALSE, /* partial_inplace */ 1114 0, /* src_mask */ 1115 0xffff, /* dst_mask */ 1116 FALSE), /* pcrel_offset */ 1117 1118 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 1119 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset 1120 to the first entry. */ 1121 HOWTO (R_PPC_GOT_TLSGD16, 1122 0, /* rightshift */ 1123 1, /* size (0 = byte, 1 = short, 2 = long) */ 1124 16, /* bitsize */ 1125 FALSE, /* pc_relative */ 1126 0, /* bitpos */ 1127 complain_overflow_signed, /* complain_on_overflow */ 1128 ppc_elf_unhandled_reloc, /* special_function */ 1129 "R_PPC_GOT_TLSGD16", /* name */ 1130 FALSE, /* partial_inplace */ 1131 0, /* src_mask */ 1132 0xffff, /* dst_mask */ 1133 FALSE), /* pcrel_offset */ 1134 1135 /* Like GOT_TLSGD16, but no overflow. */ 1136 HOWTO (R_PPC_GOT_TLSGD16_LO, 1137 0, /* rightshift */ 1138 1, /* size (0 = byte, 1 = short, 2 = long) */ 1139 16, /* bitsize */ 1140 FALSE, /* pc_relative */ 1141 0, /* bitpos */ 1142 complain_overflow_dont, /* complain_on_overflow */ 1143 ppc_elf_unhandled_reloc, /* special_function */ 1144 "R_PPC_GOT_TLSGD16_LO", /* name */ 1145 FALSE, /* partial_inplace */ 1146 0, /* src_mask */ 1147 0xffff, /* dst_mask */ 1148 FALSE), /* pcrel_offset */ 1149 1150 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ 1151 HOWTO (R_PPC_GOT_TLSGD16_HI, 1152 16, /* rightshift */ 1153 1, /* size (0 = byte, 1 = short, 2 = long) */ 1154 16, /* bitsize */ 1155 FALSE, /* pc_relative */ 1156 0, /* bitpos */ 1157 complain_overflow_dont, /* complain_on_overflow */ 1158 ppc_elf_unhandled_reloc, /* special_function */ 1159 "R_PPC_GOT_TLSGD16_HI", /* name */ 1160 FALSE, /* partial_inplace */ 1161 0, /* src_mask */ 1162 0xffff, /* dst_mask */ 1163 FALSE), /* pcrel_offset */ 1164 1165 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ 1166 HOWTO (R_PPC_GOT_TLSGD16_HA, 1167 16, /* rightshift */ 1168 1, /* size (0 = byte, 1 = short, 2 = long) */ 1169 16, /* bitsize */ 1170 FALSE, /* pc_relative */ 1171 0, /* bitpos */ 1172 complain_overflow_dont, /* complain_on_overflow */ 1173 ppc_elf_unhandled_reloc, /* special_function */ 1174 "R_PPC_GOT_TLSGD16_HA", /* name */ 1175 FALSE, /* partial_inplace */ 1176 0, /* src_mask */ 1177 0xffff, /* dst_mask */ 1178 FALSE), /* pcrel_offset */ 1179 1180 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 1181 with values (sym+add)@dtpmod and zero, and computes the offset to the 1182 first entry. */ 1183 HOWTO (R_PPC_GOT_TLSLD16, 1184 0, /* rightshift */ 1185 1, /* size (0 = byte, 1 = short, 2 = long) */ 1186 16, /* bitsize */ 1187 FALSE, /* pc_relative */ 1188 0, /* bitpos */ 1189 complain_overflow_signed, /* complain_on_overflow */ 1190 ppc_elf_unhandled_reloc, /* special_function */ 1191 "R_PPC_GOT_TLSLD16", /* name */ 1192 FALSE, /* partial_inplace */ 1193 0, /* src_mask */ 1194 0xffff, /* dst_mask */ 1195 FALSE), /* pcrel_offset */ 1196 1197 /* Like GOT_TLSLD16, but no overflow. */ 1198 HOWTO (R_PPC_GOT_TLSLD16_LO, 1199 0, /* rightshift */ 1200 1, /* size (0 = byte, 1 = short, 2 = long) */ 1201 16, /* bitsize */ 1202 FALSE, /* pc_relative */ 1203 0, /* bitpos */ 1204 complain_overflow_dont, /* complain_on_overflow */ 1205 ppc_elf_unhandled_reloc, /* special_function */ 1206 "R_PPC_GOT_TLSLD16_LO", /* name */ 1207 FALSE, /* partial_inplace */ 1208 0, /* src_mask */ 1209 0xffff, /* dst_mask */ 1210 FALSE), /* pcrel_offset */ 1211 1212 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ 1213 HOWTO (R_PPC_GOT_TLSLD16_HI, 1214 16, /* rightshift */ 1215 1, /* size (0 = byte, 1 = short, 2 = long) */ 1216 16, /* bitsize */ 1217 FALSE, /* pc_relative */ 1218 0, /* bitpos */ 1219 complain_overflow_dont, /* complain_on_overflow */ 1220 ppc_elf_unhandled_reloc, /* special_function */ 1221 "R_PPC_GOT_TLSLD16_HI", /* name */ 1222 FALSE, /* partial_inplace */ 1223 0, /* src_mask */ 1224 0xffff, /* dst_mask */ 1225 FALSE), /* pcrel_offset */ 1226 1227 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ 1228 HOWTO (R_PPC_GOT_TLSLD16_HA, 1229 16, /* rightshift */ 1230 1, /* size (0 = byte, 1 = short, 2 = long) */ 1231 16, /* bitsize */ 1232 FALSE, /* pc_relative */ 1233 0, /* bitpos */ 1234 complain_overflow_dont, /* complain_on_overflow */ 1235 ppc_elf_unhandled_reloc, /* special_function */ 1236 "R_PPC_GOT_TLSLD16_HA", /* name */ 1237 FALSE, /* partial_inplace */ 1238 0, /* src_mask */ 1239 0xffff, /* dst_mask */ 1240 FALSE), /* pcrel_offset */ 1241 1242 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes 1243 the offset to the entry. */ 1244 HOWTO (R_PPC_GOT_DTPREL16, 1245 0, /* rightshift */ 1246 1, /* size (0 = byte, 1 = short, 2 = long) */ 1247 16, /* bitsize */ 1248 FALSE, /* pc_relative */ 1249 0, /* bitpos */ 1250 complain_overflow_signed, /* complain_on_overflow */ 1251 ppc_elf_unhandled_reloc, /* special_function */ 1252 "R_PPC_GOT_DTPREL16", /* name */ 1253 FALSE, /* partial_inplace */ 1254 0, /* src_mask */ 1255 0xffff, /* dst_mask */ 1256 FALSE), /* pcrel_offset */ 1257 1258 /* Like GOT_DTPREL16, but no overflow. */ 1259 HOWTO (R_PPC_GOT_DTPREL16_LO, 1260 0, /* rightshift */ 1261 1, /* size (0 = byte, 1 = short, 2 = long) */ 1262 16, /* bitsize */ 1263 FALSE, /* pc_relative */ 1264 0, /* bitpos */ 1265 complain_overflow_dont, /* complain_on_overflow */ 1266 ppc_elf_unhandled_reloc, /* special_function */ 1267 "R_PPC_GOT_DTPREL16_LO", /* name */ 1268 FALSE, /* partial_inplace */ 1269 0, /* src_mask */ 1270 0xffff, /* dst_mask */ 1271 FALSE), /* pcrel_offset */ 1272 1273 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */ 1274 HOWTO (R_PPC_GOT_DTPREL16_HI, 1275 16, /* rightshift */ 1276 1, /* size (0 = byte, 1 = short, 2 = long) */ 1277 16, /* bitsize */ 1278 FALSE, /* pc_relative */ 1279 0, /* bitpos */ 1280 complain_overflow_dont, /* complain_on_overflow */ 1281 ppc_elf_unhandled_reloc, /* special_function */ 1282 "R_PPC_GOT_DTPREL16_HI", /* name */ 1283 FALSE, /* partial_inplace */ 1284 0, /* src_mask */ 1285 0xffff, /* dst_mask */ 1286 FALSE), /* pcrel_offset */ 1287 1288 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ 1289 HOWTO (R_PPC_GOT_DTPREL16_HA, 1290 16, /* rightshift */ 1291 1, /* size (0 = byte, 1 = short, 2 = long) */ 1292 16, /* bitsize */ 1293 FALSE, /* pc_relative */ 1294 0, /* bitpos */ 1295 complain_overflow_dont, /* complain_on_overflow */ 1296 ppc_elf_unhandled_reloc, /* special_function */ 1297 "R_PPC_GOT_DTPREL16_HA", /* name */ 1298 FALSE, /* partial_inplace */ 1299 0, /* src_mask */ 1300 0xffff, /* dst_mask */ 1301 FALSE), /* pcrel_offset */ 1302 1303 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the 1304 offset to the entry. */ 1305 HOWTO (R_PPC_GOT_TPREL16, 1306 0, /* rightshift */ 1307 1, /* size (0 = byte, 1 = short, 2 = long) */ 1308 16, /* bitsize */ 1309 FALSE, /* pc_relative */ 1310 0, /* bitpos */ 1311 complain_overflow_signed, /* complain_on_overflow */ 1312 ppc_elf_unhandled_reloc, /* special_function */ 1313 "R_PPC_GOT_TPREL16", /* name */ 1314 FALSE, /* partial_inplace */ 1315 0, /* src_mask */ 1316 0xffff, /* dst_mask */ 1317 FALSE), /* pcrel_offset */ 1318 1319 /* Like GOT_TPREL16, but no overflow. */ 1320 HOWTO (R_PPC_GOT_TPREL16_LO, 1321 0, /* rightshift */ 1322 1, /* size (0 = byte, 1 = short, 2 = long) */ 1323 16, /* bitsize */ 1324 FALSE, /* pc_relative */ 1325 0, /* bitpos */ 1326 complain_overflow_dont, /* complain_on_overflow */ 1327 ppc_elf_unhandled_reloc, /* special_function */ 1328 "R_PPC_GOT_TPREL16_LO", /* name */ 1329 FALSE, /* partial_inplace */ 1330 0, /* src_mask */ 1331 0xffff, /* dst_mask */ 1332 FALSE), /* pcrel_offset */ 1333 1334 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */ 1335 HOWTO (R_PPC_GOT_TPREL16_HI, 1336 16, /* rightshift */ 1337 1, /* size (0 = byte, 1 = short, 2 = long) */ 1338 16, /* bitsize */ 1339 FALSE, /* pc_relative */ 1340 0, /* bitpos */ 1341 complain_overflow_dont, /* complain_on_overflow */ 1342 ppc_elf_unhandled_reloc, /* special_function */ 1343 "R_PPC_GOT_TPREL16_HI", /* name */ 1344 FALSE, /* partial_inplace */ 1345 0, /* src_mask */ 1346 0xffff, /* dst_mask */ 1347 FALSE), /* pcrel_offset */ 1348 1349 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ 1350 HOWTO (R_PPC_GOT_TPREL16_HA, 1351 16, /* rightshift */ 1352 1, /* size (0 = byte, 1 = short, 2 = long) */ 1353 16, /* bitsize */ 1354 FALSE, /* pc_relative */ 1355 0, /* bitpos */ 1356 complain_overflow_dont, /* complain_on_overflow */ 1357 ppc_elf_unhandled_reloc, /* special_function */ 1358 "R_PPC_GOT_TPREL16_HA", /* name */ 1359 FALSE, /* partial_inplace */ 1360 0, /* src_mask */ 1361 0xffff, /* dst_mask */ 1362 FALSE), /* pcrel_offset */ 1363 1364 /* The remaining relocs are from the Embedded ELF ABI, and are not 1365 in the SVR4 ELF ABI. */ 1366 1367 /* 32 bit value resulting from the addend minus the symbol. */ 1368 HOWTO (R_PPC_EMB_NADDR32, /* type */ 1369 0, /* rightshift */ 1370 2, /* size (0 = byte, 1 = short, 2 = long) */ 1371 32, /* bitsize */ 1372 FALSE, /* pc_relative */ 1373 0, /* bitpos */ 1374 complain_overflow_bitfield, /* complain_on_overflow */ 1375 bfd_elf_generic_reloc, /* special_function */ 1376 "R_PPC_EMB_NADDR32", /* name */ 1377 FALSE, /* partial_inplace */ 1378 0, /* src_mask */ 1379 0xffffffff, /* dst_mask */ 1380 FALSE), /* pcrel_offset */ 1381 1382 /* 16 bit value resulting from the addend minus the symbol. */ 1383 HOWTO (R_PPC_EMB_NADDR16, /* type */ 1384 0, /* rightshift */ 1385 1, /* size (0 = byte, 1 = short, 2 = long) */ 1386 16, /* bitsize */ 1387 FALSE, /* pc_relative */ 1388 0, /* bitpos */ 1389 complain_overflow_bitfield, /* complain_on_overflow */ 1390 bfd_elf_generic_reloc, /* special_function */ 1391 "R_PPC_EMB_NADDR16", /* name */ 1392 FALSE, /* partial_inplace */ 1393 0, /* src_mask */ 1394 0xffff, /* dst_mask */ 1395 FALSE), /* pcrel_offset */ 1396 1397 /* 16 bit value resulting from the addend minus the symbol. */ 1398 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */ 1399 0, /* rightshift */ 1400 1, /* size (0 = byte, 1 = short, 2 = long) */ 1401 16, /* bitsize */ 1402 FALSE, /* pc_relative */ 1403 0, /* bitpos */ 1404 complain_overflow_dont,/* complain_on_overflow */ 1405 bfd_elf_generic_reloc, /* special_function */ 1406 "R_PPC_EMB_ADDR16_LO", /* name */ 1407 FALSE, /* partial_inplace */ 1408 0, /* src_mask */ 1409 0xffff, /* dst_mask */ 1410 FALSE), /* pcrel_offset */ 1411 1412 /* The high order 16 bits of the addend minus the symbol. */ 1413 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */ 1414 16, /* rightshift */ 1415 1, /* size (0 = byte, 1 = short, 2 = long) */ 1416 16, /* bitsize */ 1417 FALSE, /* pc_relative */ 1418 0, /* bitpos */ 1419 complain_overflow_dont, /* complain_on_overflow */ 1420 bfd_elf_generic_reloc, /* special_function */ 1421 "R_PPC_EMB_NADDR16_HI", /* name */ 1422 FALSE, /* partial_inplace */ 1423 0, /* src_mask */ 1424 0xffff, /* dst_mask */ 1425 FALSE), /* pcrel_offset */ 1426 1427 /* The high order 16 bits of the result of the addend minus the address, 1428 plus 1 if the contents of the low 16 bits, treated as a signed number, 1429 is negative. */ 1430 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */ 1431 16, /* rightshift */ 1432 1, /* size (0 = byte, 1 = short, 2 = long) */ 1433 16, /* bitsize */ 1434 FALSE, /* pc_relative */ 1435 0, /* bitpos */ 1436 complain_overflow_dont, /* complain_on_overflow */ 1437 ppc_elf_addr16_ha_reloc, /* special_function */ 1438 "R_PPC_EMB_NADDR16_HA", /* name */ 1439 FALSE, /* partial_inplace */ 1440 0, /* src_mask */ 1441 0xffff, /* dst_mask */ 1442 FALSE), /* pcrel_offset */ 1443 1444 /* 16 bit value resulting from allocating a 4 byte word to hold an 1445 address in the .sdata section, and returning the offset from 1446 _SDA_BASE_ for that relocation. */ 1447 HOWTO (R_PPC_EMB_SDAI16, /* type */ 1448 0, /* rightshift */ 1449 1, /* size (0 = byte, 1 = short, 2 = long) */ 1450 16, /* bitsize */ 1451 FALSE, /* pc_relative */ 1452 0, /* bitpos */ 1453 complain_overflow_bitfield, /* complain_on_overflow */ 1454 bfd_elf_generic_reloc, /* special_function */ 1455 "R_PPC_EMB_SDAI16", /* name */ 1456 FALSE, /* partial_inplace */ 1457 0, /* src_mask */ 1458 0xffff, /* dst_mask */ 1459 FALSE), /* pcrel_offset */ 1460 1461 /* 16 bit value resulting from allocating a 4 byte word to hold an 1462 address in the .sdata2 section, and returning the offset from 1463 _SDA2_BASE_ for that relocation. */ 1464 HOWTO (R_PPC_EMB_SDA2I16, /* type */ 1465 0, /* rightshift */ 1466 1, /* size (0 = byte, 1 = short, 2 = long) */ 1467 16, /* bitsize */ 1468 FALSE, /* pc_relative */ 1469 0, /* bitpos */ 1470 complain_overflow_bitfield, /* complain_on_overflow */ 1471 bfd_elf_generic_reloc, /* special_function */ 1472 "R_PPC_EMB_SDA2I16", /* name */ 1473 FALSE, /* partial_inplace */ 1474 0, /* src_mask */ 1475 0xffff, /* dst_mask */ 1476 FALSE), /* pcrel_offset */ 1477 1478 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with 1479 small data items. */ 1480 HOWTO (R_PPC_EMB_SDA2REL, /* type */ 1481 0, /* rightshift */ 1482 1, /* size (0 = byte, 1 = short, 2 = long) */ 1483 16, /* bitsize */ 1484 FALSE, /* pc_relative */ 1485 0, /* bitpos */ 1486 complain_overflow_signed, /* complain_on_overflow */ 1487 bfd_elf_generic_reloc, /* special_function */ 1488 "R_PPC_EMB_SDA2REL", /* name */ 1489 FALSE, /* partial_inplace */ 1490 0, /* src_mask */ 1491 0xffff, /* dst_mask */ 1492 FALSE), /* pcrel_offset */ 1493 1494 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit 1495 signed offset from the appropriate base, and filling in the register 1496 field with the appropriate register (0, 2, or 13). */ 1497 HOWTO (R_PPC_EMB_SDA21, /* type */ 1498 0, /* rightshift */ 1499 2, /* size (0 = byte, 1 = short, 2 = long) */ 1500 16, /* bitsize */ 1501 FALSE, /* pc_relative */ 1502 0, /* bitpos */ 1503 complain_overflow_signed, /* complain_on_overflow */ 1504 bfd_elf_generic_reloc, /* special_function */ 1505 "R_PPC_EMB_SDA21", /* name */ 1506 FALSE, /* partial_inplace */ 1507 0, /* src_mask */ 1508 0xffff, /* dst_mask */ 1509 FALSE), /* pcrel_offset */ 1510 1511 /* Relocation not handled: R_PPC_EMB_MRKREF */ 1512 /* Relocation not handled: R_PPC_EMB_RELSEC16 */ 1513 /* Relocation not handled: R_PPC_EMB_RELST_LO */ 1514 /* Relocation not handled: R_PPC_EMB_RELST_HI */ 1515 /* Relocation not handled: R_PPC_EMB_RELST_HA */ 1516 /* Relocation not handled: R_PPC_EMB_BIT_FLD */ 1517 1518 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling 1519 in the 16 bit signed offset from the appropriate base, and filling in the 1520 register field with the appropriate register (0, 2, or 13). */ 1521 HOWTO (R_PPC_EMB_RELSDA, /* type */ 1522 0, /* rightshift */ 1523 1, /* size (0 = byte, 1 = short, 2 = long) */ 1524 16, /* bitsize */ 1525 TRUE, /* pc_relative */ 1526 0, /* bitpos */ 1527 complain_overflow_signed, /* complain_on_overflow */ 1528 bfd_elf_generic_reloc, /* special_function */ 1529 "R_PPC_EMB_RELSDA", /* name */ 1530 FALSE, /* partial_inplace */ 1531 0, /* src_mask */ 1532 0xffff, /* dst_mask */ 1533 FALSE), /* pcrel_offset */ 1534 1535 /* Phony relocs to handle branch stubs. */ 1536 HOWTO (R_PPC_RELAX32, /* type */ 1537 0, /* rightshift */ 1538 0, /* size */ 1539 0, /* bitsize */ 1540 FALSE, /* pc_relative */ 1541 0, /* bitpos */ 1542 complain_overflow_dont, /* complain_on_overflow */ 1543 bfd_elf_generic_reloc, /* special_function */ 1544 "R_PPC_RELAX32", /* name */ 1545 FALSE, /* partial_inplace */ 1546 0, /* src_mask */ 1547 0, /* dst_mask */ 1548 FALSE), /* pcrel_offset */ 1549 1550 HOWTO (R_PPC_RELAX32PC, /* type */ 1551 0, /* rightshift */ 1552 0, /* size */ 1553 0, /* bitsize */ 1554 FALSE, /* pc_relative */ 1555 0, /* bitpos */ 1556 complain_overflow_dont, /* complain_on_overflow */ 1557 bfd_elf_generic_reloc, /* special_function */ 1558 "R_PPC_RELAX32PC", /* name */ 1559 FALSE, /* partial_inplace */ 1560 0, /* src_mask */ 1561 0, /* dst_mask */ 1562 FALSE), /* pcrel_offset */ 1563 1564 /* GNU extension to record C++ vtable hierarchy. */ 1565 HOWTO (R_PPC_GNU_VTINHERIT, /* type */ 1566 0, /* rightshift */ 1567 0, /* size (0 = byte, 1 = short, 2 = long) */ 1568 0, /* bitsize */ 1569 FALSE, /* pc_relative */ 1570 0, /* bitpos */ 1571 complain_overflow_dont, /* complain_on_overflow */ 1572 NULL, /* special_function */ 1573 "R_PPC_GNU_VTINHERIT", /* name */ 1574 FALSE, /* partial_inplace */ 1575 0, /* src_mask */ 1576 0, /* dst_mask */ 1577 FALSE), /* pcrel_offset */ 1578 1579 /* GNU extension to record C++ vtable member usage. */ 1580 HOWTO (R_PPC_GNU_VTENTRY, /* type */ 1581 0, /* rightshift */ 1582 0, /* size (0 = byte, 1 = short, 2 = long) */ 1583 0, /* bitsize */ 1584 FALSE, /* pc_relative */ 1585 0, /* bitpos */ 1586 complain_overflow_dont, /* complain_on_overflow */ 1587 NULL, /* special_function */ 1588 "R_PPC_GNU_VTENTRY", /* name */ 1589 FALSE, /* partial_inplace */ 1590 0, /* src_mask */ 1591 0, /* dst_mask */ 1592 FALSE), /* pcrel_offset */ 1593 1594 /* Phony reloc to handle AIX style TOC entries. */ 1595 HOWTO (R_PPC_TOC16, /* type */ 1596 0, /* rightshift */ 1597 1, /* size (0 = byte, 1 = short, 2 = long) */ 1598 16, /* bitsize */ 1599 FALSE, /* pc_relative */ 1600 0, /* bitpos */ 1601 complain_overflow_signed, /* complain_on_overflow */ 1602 bfd_elf_generic_reloc, /* special_function */ 1603 "R_PPC_TOC16", /* name */ 1604 FALSE, /* partial_inplace */ 1605 0, /* src_mask */ 1606 0xffff, /* dst_mask */ 1607 FALSE), /* pcrel_offset */ 1608 }; 1609 1610 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ 1611 1612 static void 1613 ppc_elf_howto_init (void) 1614 { 1615 unsigned int i, type; 1616 1617 for (i = 0; 1618 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); 1619 i++) 1620 { 1621 type = ppc_elf_howto_raw[i].type; 1622 if (type >= (sizeof (ppc_elf_howto_table) 1623 / sizeof (ppc_elf_howto_table[0]))) 1624 abort (); 1625 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; 1626 } 1627 } 1628 1629 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) 1630 1631 static const int shared_stub_entry[] = 1632 { 1633 0x7c0802a6, /* mflr 0 */ 1634 0x429f0005, /* bcl 20, 31, .Lxxx */ 1635 0x7d6802a6, /* mflr 11 */ 1636 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */ 1637 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */ 1638 0x7c0803a6, /* mtlr 0 */ 1639 0x7d6903a6, /* mtctr 11 */ 1640 0x4e800420, /* bctr */ 1641 }; 1642 1643 static const int stub_entry[] = 1644 { 1645 0x3d600000, /* lis 11,xxx@ha */ 1646 0x396b0000, /* addi 11,11,xxx@l */ 1647 0x7d6903a6, /* mtctr 11 */ 1648 0x4e800420, /* bctr */ 1649 }; 1650 1651 1652 static bfd_boolean 1653 ppc_elf_relax_section (bfd *abfd, 1654 asection *isec, 1655 struct bfd_link_info *link_info, 1656 bfd_boolean *again) 1657 { 1658 struct one_fixup 1659 { 1660 struct one_fixup *next; 1661 asection *tsec; 1662 bfd_vma toff; 1663 bfd_vma trampoff; 1664 }; 1665 1666 Elf_Internal_Shdr *symtab_hdr; 1667 bfd_byte *contents = NULL; 1668 Elf_Internal_Sym *isymbuf = NULL; 1669 Elf_Internal_Rela *internal_relocs = NULL; 1670 Elf_Internal_Rela *irel, *irelend; 1671 struct one_fixup *fixups = NULL; 1672 bfd_boolean changed; 1673 struct ppc_elf_link_hash_table *ppc_info; 1674 bfd_size_type trampoff; 1675 1676 *again = FALSE; 1677 1678 /* Nothing to do if there are no relocations. */ 1679 if ((isec->flags & SEC_RELOC) == 0 || isec->reloc_count == 0) 1680 return TRUE; 1681 1682 /* If needed, initialize this section's cooked size. */ 1683 if (isec->_cooked_size == 0) 1684 isec->_cooked_size = isec->_raw_size; 1685 1686 trampoff = (isec->_cooked_size + 3) & (bfd_vma) -4; 1687 /* Space for a branch around any trampolines. */ 1688 trampoff += 4; 1689 1690 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1691 1692 /* Get a copy of the native relocations. */ 1693 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, 1694 link_info->keep_memory); 1695 if (internal_relocs == NULL) 1696 goto error_return; 1697 1698 ppc_info = ppc_elf_hash_table (link_info); 1699 irelend = internal_relocs + isec->reloc_count; 1700 1701 /* Get the section contents. */ 1702 /* Get cached copy if it exists. */ 1703 if (elf_section_data (isec)->this_hdr.contents != NULL) 1704 contents = elf_section_data (isec)->this_hdr.contents; 1705 else 1706 { 1707 /* Go get them off disk. */ 1708 contents = bfd_malloc (isec->_raw_size); 1709 if (contents == NULL) 1710 goto error_return; 1711 1712 if (!bfd_get_section_contents (abfd, isec, contents, 0, isec->_raw_size)) 1713 goto error_return; 1714 } 1715 1716 for (irel = internal_relocs; irel < irelend; irel++) 1717 { 1718 unsigned long r_type = ELF32_R_TYPE (irel->r_info); 1719 bfd_vma symaddr, reladdr, toff, roff; 1720 asection *tsec; 1721 struct one_fixup *f; 1722 size_t insn_offset = 0; 1723 bfd_vma max_branch_offset, val; 1724 bfd_byte *hit_addr; 1725 unsigned long t0; 1726 1727 switch (r_type) 1728 { 1729 case R_PPC_REL24: 1730 case R_PPC_LOCAL24PC: 1731 case R_PPC_PLTREL24: 1732 max_branch_offset = 1 << 25; 1733 break; 1734 1735 case R_PPC_REL14: 1736 case R_PPC_REL14_BRTAKEN: 1737 case R_PPC_REL14_BRNTAKEN: 1738 max_branch_offset = 1 << 15; 1739 break; 1740 1741 default: 1742 continue; 1743 } 1744 1745 /* Get the value of the symbol referred to by the reloc. */ 1746 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 1747 { 1748 /* A local symbol. */ 1749 Elf_Internal_Sym *isym; 1750 1751 /* Read this BFD's local symbols. */ 1752 if (isymbuf == NULL) 1753 { 1754 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 1755 if (isymbuf == NULL) 1756 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 1757 symtab_hdr->sh_info, 0, 1758 NULL, NULL, NULL); 1759 if (isymbuf == 0) 1760 goto error_return; 1761 } 1762 isym = isymbuf + ELF32_R_SYM (irel->r_info); 1763 if (isym->st_shndx == SHN_UNDEF) 1764 continue; /* We can't do anything with undefined symbols. */ 1765 else if (isym->st_shndx == SHN_ABS) 1766 tsec = bfd_abs_section_ptr; 1767 else if (isym->st_shndx == SHN_COMMON) 1768 tsec = bfd_com_section_ptr; 1769 else 1770 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); 1771 1772 toff = isym->st_value; 1773 } 1774 else 1775 { 1776 /* Global symbol handling. */ 1777 unsigned long indx; 1778 struct elf_link_hash_entry *h; 1779 1780 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 1781 h = elf_sym_hashes (abfd)[indx]; 1782 1783 while (h->root.type == bfd_link_hash_indirect 1784 || h->root.type == bfd_link_hash_warning) 1785 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1786 1787 if (r_type == R_PPC_PLTREL24 1788 && ppc_info->plt != NULL 1789 && h->plt.offset != (bfd_vma) -1) 1790 { 1791 tsec = ppc_info->plt; 1792 toff = h->plt.offset; 1793 } 1794 else if (h->root.type == bfd_link_hash_defined 1795 || h->root.type == bfd_link_hash_defweak) 1796 { 1797 tsec = h->root.u.def.section; 1798 toff = h->root.u.def.value; 1799 } 1800 else 1801 continue; 1802 } 1803 1804 /* If the branch and target are in the same section, you have 1805 no hope of adding stubs. We'll error out later should the 1806 branch overflow. */ 1807 if (tsec == isec) 1808 continue; 1809 1810 toff += irel->r_addend; 1811 if (tsec->sec_info_type == ELF_INFO_TYPE_MERGE) 1812 toff = _bfd_merged_section_offset (abfd, &tsec, 1813 elf_section_data (tsec)->sec_info, 1814 toff, 0); 1815 1816 symaddr = tsec->output_section->vma + tsec->output_offset + toff; 1817 1818 roff = irel->r_offset; 1819 reladdr = isec->output_section->vma + isec->output_offset + roff; 1820 1821 /* If the branch is in range, no need to do anything. */ 1822 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset) 1823 continue; 1824 1825 /* Look for an existing fixup to this address. */ 1826 for (f = fixups; f ; f = f->next) 1827 if (f->tsec == tsec && f->toff == toff) 1828 break; 1829 1830 if (f == NULL) 1831 { 1832 size_t size; 1833 unsigned long stub_rtype; 1834 1835 val = trampoff - roff; 1836 if (val >= max_branch_offset) 1837 /* Oh dear, we can't reach a trampoline. Don't try to add 1838 one. We'll report an error later. */ 1839 continue; 1840 1841 if (link_info->shared) 1842 { 1843 size = 4 * ARRAY_SIZE (shared_stub_entry); 1844 insn_offset = 12; 1845 stub_rtype = R_PPC_RELAX32PC; 1846 } 1847 else 1848 { 1849 size = 4 * ARRAY_SIZE (stub_entry); 1850 insn_offset = 0; 1851 stub_rtype = R_PPC_RELAX32; 1852 } 1853 1854 /* Hijack the old relocation. Since we need two 1855 relocations for this use a "composite" reloc. */ 1856 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 1857 stub_rtype); 1858 irel->r_offset = trampoff + insn_offset; 1859 1860 /* Record the fixup so we don't do it again this section. */ 1861 f = bfd_malloc (sizeof (*f)); 1862 f->next = fixups; 1863 f->tsec = tsec; 1864 f->toff = toff; 1865 f->trampoff = trampoff; 1866 fixups = f; 1867 1868 trampoff += size; 1869 } 1870 else 1871 { 1872 val = f->trampoff - roff; 1873 if (val >= max_branch_offset) 1874 continue; 1875 1876 /* Nop out the reloc, since we're finalizing things here. */ 1877 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); 1878 } 1879 1880 /* Fix up the existing branch to hit the trampoline. */ 1881 hit_addr = contents + roff; 1882 switch (r_type) 1883 { 1884 case R_PPC_REL24: 1885 case R_PPC_LOCAL24PC: 1886 case R_PPC_PLTREL24: 1887 t0 = bfd_get_32 (abfd, hit_addr); 1888 t0 &= ~0x3fffffc; 1889 t0 |= val & 0x3fffffc; 1890 bfd_put_32 (abfd, t0, hit_addr); 1891 break; 1892 1893 case R_PPC_REL14: 1894 case R_PPC_REL14_BRTAKEN: 1895 case R_PPC_REL14_BRNTAKEN: 1896 t0 = bfd_get_32 (abfd, hit_addr); 1897 t0 &= ~0xfffc; 1898 t0 |= val & 0xfffc; 1899 bfd_put_32 (abfd, t0, hit_addr); 1900 break; 1901 } 1902 } 1903 1904 /* Write out the trampolines. */ 1905 changed = fixups != NULL; 1906 if (fixups != NULL) 1907 { 1908 const int *stub; 1909 bfd_byte *dest; 1910 bfd_vma val; 1911 int i, size; 1912 1913 do 1914 { 1915 struct one_fixup *f = fixups; 1916 fixups = fixups->next; 1917 free (f); 1918 } 1919 while (fixups); 1920 1921 contents = bfd_realloc (contents, trampoff); 1922 if (contents == NULL) 1923 goto error_return; 1924 1925 isec->_cooked_size = (isec->_cooked_size + 3) & (bfd_vma) -4; 1926 /* Branch around the trampolines. */ 1927 val = trampoff - isec->_cooked_size + 0x48000000; 1928 dest = contents + isec->_cooked_size; 1929 isec->_cooked_size = trampoff; 1930 bfd_put_32 (abfd, val, dest); 1931 dest += 4; 1932 1933 if (link_info->shared) 1934 { 1935 stub = shared_stub_entry; 1936 size = ARRAY_SIZE (shared_stub_entry); 1937 } 1938 else 1939 { 1940 stub = stub_entry; 1941 size = ARRAY_SIZE (stub_entry); 1942 } 1943 1944 i = 0; 1945 while (dest < contents + trampoff) 1946 { 1947 bfd_put_32 (abfd, stub[i], dest); 1948 i++; 1949 if (i == size) 1950 i = 0; 1951 dest += 4; 1952 } 1953 BFD_ASSERT (i == 0); 1954 } 1955 1956 if (isymbuf != NULL 1957 && symtab_hdr->contents != (unsigned char *) isymbuf) 1958 { 1959 if (! link_info->keep_memory) 1960 free (isymbuf); 1961 else 1962 { 1963 /* Cache the symbols for elf_link_input_bfd. */ 1964 symtab_hdr->contents = (unsigned char *) isymbuf; 1965 } 1966 } 1967 1968 if (contents != NULL 1969 && elf_section_data (isec)->this_hdr.contents != contents) 1970 { 1971 if (!changed && !link_info->keep_memory) 1972 free (contents); 1973 else 1974 { 1975 /* Cache the section contents for elf_link_input_bfd. */ 1976 elf_section_data (isec)->this_hdr.contents = contents; 1977 } 1978 } 1979 1980 if (elf_section_data (isec)->relocs != internal_relocs) 1981 { 1982 if (!changed) 1983 free (internal_relocs); 1984 else 1985 elf_section_data (isec)->relocs = internal_relocs; 1986 } 1987 1988 *again = changed; 1989 return TRUE; 1990 1991 error_return: 1992 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) 1993 free (isymbuf); 1994 if (contents != NULL 1995 && elf_section_data (isec)->this_hdr.contents != contents) 1996 free (contents); 1997 if (internal_relocs != NULL 1998 && elf_section_data (isec)->relocs != internal_relocs) 1999 free (internal_relocs); 2000 return FALSE; 2001 } 2002 2003 static reloc_howto_type * 2004 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 2005 bfd_reloc_code_real_type code) 2006 { 2007 enum elf_ppc_reloc_type r; 2008 2009 /* Initialize howto table if not already done. */ 2010 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 2011 ppc_elf_howto_init (); 2012 2013 switch (code) 2014 { 2015 default: 2016 return NULL; 2017 2018 case BFD_RELOC_NONE: r = R_PPC_NONE; break; 2019 case BFD_RELOC_32: r = R_PPC_ADDR32; break; 2020 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; 2021 case BFD_RELOC_16: r = R_PPC_ADDR16; break; 2022 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; 2023 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; 2024 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; 2025 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break; 2026 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break; 2027 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break; 2028 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break; 2029 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; 2030 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; 2031 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; 2032 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; 2033 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; 2034 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; 2035 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; 2036 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break; 2037 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break; 2038 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break; 2039 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break; 2040 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; 2041 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; 2042 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; 2043 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; 2044 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; 2045 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; 2046 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; 2047 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; 2048 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; 2049 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; 2050 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; 2051 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; 2052 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; 2053 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; 2054 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; 2055 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; 2056 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; 2057 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; 2058 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; 2059 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; 2060 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; 2061 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; 2062 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; 2063 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; 2064 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break; 2065 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break; 2066 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break; 2067 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break; 2068 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break; 2069 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break; 2070 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break; 2071 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break; 2072 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break; 2073 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break; 2074 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break; 2075 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break; 2076 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break; 2077 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break; 2078 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break; 2079 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break; 2080 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break; 2081 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break; 2082 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break; 2083 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break; 2084 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break; 2085 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break; 2086 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break; 2087 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break; 2088 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break; 2089 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break; 2090 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break; 2091 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break; 2092 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break; 2093 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break; 2094 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break; 2095 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break; 2096 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break; 2097 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break; 2098 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break; 2099 } 2100 2101 return ppc_elf_howto_table[r]; 2102 }; 2103 2104 /* Set the howto pointer for a PowerPC ELF reloc. */ 2105 2106 static void 2107 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 2108 arelent *cache_ptr, 2109 Elf_Internal_Rela *dst) 2110 { 2111 /* Initialize howto table if not already done. */ 2112 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 2113 ppc_elf_howto_init (); 2114 2115 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max); 2116 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)]; 2117 } 2118 2119 /* Handle the R_PPC_ADDR16_HA reloc. */ 2120 2121 static bfd_reloc_status_type 2122 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED, 2123 arelent *reloc_entry, 2124 asymbol *symbol, 2125 void *data ATTRIBUTE_UNUSED, 2126 asection *input_section, 2127 bfd *output_bfd, 2128 char **error_message ATTRIBUTE_UNUSED) 2129 { 2130 bfd_vma relocation; 2131 2132 if (output_bfd != NULL) 2133 { 2134 reloc_entry->address += input_section->output_offset; 2135 return bfd_reloc_ok; 2136 } 2137 2138 if (reloc_entry->address > input_section->_cooked_size) 2139 return bfd_reloc_outofrange; 2140 2141 if (bfd_is_com_section (symbol->section)) 2142 relocation = 0; 2143 else 2144 relocation = symbol->value; 2145 2146 relocation += symbol->section->output_section->vma; 2147 relocation += symbol->section->output_offset; 2148 relocation += reloc_entry->addend; 2149 2150 reloc_entry->addend += (relocation & 0x8000) << 1; 2151 2152 return bfd_reloc_continue; 2153 } 2154 2155 static bfd_reloc_status_type 2156 ppc_elf_unhandled_reloc (bfd *abfd, 2157 arelent *reloc_entry, 2158 asymbol *symbol, 2159 void *data, 2160 asection *input_section, 2161 bfd *output_bfd, 2162 char **error_message) 2163 { 2164 /* If this is a relocatable link (output_bfd test tells us), just 2165 call the generic function. Any adjustment will be done at final 2166 link time. */ 2167 if (output_bfd != NULL) 2168 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2169 input_section, output_bfd, error_message); 2170 2171 if (error_message != NULL) 2172 { 2173 static char buf[60]; 2174 sprintf (buf, _("generic linker can't handle %s"), 2175 reloc_entry->howto->name); 2176 *error_message = buf; 2177 } 2178 return bfd_reloc_dangerous; 2179 } 2180 2181 /* Fix bad default arch selected for a 32 bit input bfd when the 2182 default is 64 bit. */ 2183 2184 static bfd_boolean 2185 ppc_elf_object_p (bfd *abfd) 2186 { 2187 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64) 2188 { 2189 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); 2190 2191 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32) 2192 { 2193 /* Relies on arch after 64 bit default being 32 bit default. */ 2194 abfd->arch_info = abfd->arch_info->next; 2195 BFD_ASSERT (abfd->arch_info->bits_per_word == 32); 2196 } 2197 } 2198 return TRUE; 2199 } 2200 2201 /* Function to set whether a module needs the -mrelocatable bit set. */ 2202 2203 static bfd_boolean 2204 ppc_elf_set_private_flags (bfd *abfd, flagword flags) 2205 { 2206 BFD_ASSERT (!elf_flags_init (abfd) 2207 || elf_elfheader (abfd)->e_flags == flags); 2208 2209 elf_elfheader (abfd)->e_flags = flags; 2210 elf_flags_init (abfd) = TRUE; 2211 return TRUE; 2212 } 2213 2214 /* Merge backend specific data from an object file to the output 2215 object file when linking. */ 2216 2217 static bfd_boolean 2218 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 2219 { 2220 flagword old_flags; 2221 flagword new_flags; 2222 bfd_boolean error; 2223 2224 /* Check if we have the same endianess. */ 2225 if (! _bfd_generic_verify_endian_match (ibfd, obfd)) 2226 return FALSE; 2227 2228 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 2229 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 2230 return TRUE; 2231 2232 new_flags = elf_elfheader (ibfd)->e_flags; 2233 old_flags = elf_elfheader (obfd)->e_flags; 2234 if (!elf_flags_init (obfd)) 2235 { 2236 /* First call, no flags set. */ 2237 elf_flags_init (obfd) = TRUE; 2238 elf_elfheader (obfd)->e_flags = new_flags; 2239 } 2240 2241 /* Compatible flags are ok. */ 2242 else if (new_flags == old_flags) 2243 ; 2244 2245 /* Incompatible flags. */ 2246 else 2247 { 2248 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib 2249 to be linked with either. */ 2250 error = FALSE; 2251 if ((new_flags & EF_PPC_RELOCATABLE) != 0 2252 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) 2253 { 2254 error = TRUE; 2255 (*_bfd_error_handler) 2256 (_("%s: compiled with -mrelocatable and linked with " 2257 "modules compiled normally"), 2258 bfd_archive_filename (ibfd)); 2259 } 2260 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 2261 && (old_flags & EF_PPC_RELOCATABLE) != 0) 2262 { 2263 error = TRUE; 2264 (*_bfd_error_handler) 2265 (_("%s: compiled normally and linked with " 2266 "modules compiled with -mrelocatable"), 2267 bfd_archive_filename (ibfd)); 2268 } 2269 2270 /* The output is -mrelocatable-lib iff both the input files are. */ 2271 if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) 2272 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; 2273 2274 /* The output is -mrelocatable iff it can't be -mrelocatable-lib, 2275 but each input file is either -mrelocatable or -mrelocatable-lib. */ 2276 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) 2277 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) 2278 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) 2279 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; 2280 2281 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if 2282 any module uses it. */ 2283 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); 2284 2285 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 2286 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 2287 2288 /* Warn about any other mismatches. */ 2289 if (new_flags != old_flags) 2290 { 2291 error = TRUE; 2292 (*_bfd_error_handler) 2293 (_("%s: uses different e_flags (0x%lx) fields " 2294 "than previous modules (0x%lx)"), 2295 bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags); 2296 } 2297 2298 if (error) 2299 { 2300 bfd_set_error (bfd_error_bad_value); 2301 return FALSE; 2302 } 2303 } 2304 2305 return TRUE; 2306 } 2307 2308 /* Handle a PowerPC specific section when reading an object file. This 2309 is called when elfcode.h finds a section with an unknown type. */ 2310 2311 static bfd_boolean 2312 ppc_elf_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, const char *name) 2313 { 2314 asection *newsect; 2315 flagword flags; 2316 2317 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) 2318 return FALSE; 2319 2320 newsect = hdr->bfd_section; 2321 flags = bfd_get_section_flags (abfd, newsect); 2322 if (hdr->sh_flags & SHF_EXCLUDE) 2323 flags |= SEC_EXCLUDE; 2324 2325 if (hdr->sh_type == SHT_ORDERED) 2326 flags |= SEC_SORT_ENTRIES; 2327 2328 bfd_set_section_flags (abfd, newsect, flags); 2329 return TRUE; 2330 } 2331 2332 /* Set up any other section flags and such that may be necessary. */ 2333 2334 static bfd_boolean 2335 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, 2336 Elf_Internal_Shdr *shdr, 2337 asection *asect) 2338 { 2339 if ((asect->flags & SEC_EXCLUDE) != 0) 2340 shdr->sh_flags |= SHF_EXCLUDE; 2341 2342 if ((asect->flags & SEC_SORT_ENTRIES) != 0) 2343 shdr->sh_type = SHT_ORDERED; 2344 2345 return TRUE; 2346 } 2347 2348 /* Find a linker generated pointer with a given addend and type. */ 2349 2350 static elf_linker_section_pointers_t * 2351 elf_find_pointer_linker_section 2352 (elf_linker_section_pointers_t *linker_pointers, 2353 bfd_vma addend, 2354 elf_linker_section_t *lsect) 2355 { 2356 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next) 2357 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend) 2358 return linker_pointers; 2359 2360 return NULL; 2361 } 2362 2363 /* Allocate a pointer to live in a linker created section. */ 2364 2365 static bfd_boolean 2366 elf_create_pointer_linker_section (bfd *abfd, 2367 struct bfd_link_info *info, 2368 elf_linker_section_t *lsect, 2369 struct elf_link_hash_entry *h, 2370 const Elf_Internal_Rela *rel) 2371 { 2372 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; 2373 elf_linker_section_pointers_t *linker_section_ptr; 2374 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 2375 bfd_size_type amt; 2376 2377 BFD_ASSERT (lsect != NULL); 2378 2379 /* Is this a global symbol? */ 2380 if (h != NULL) 2381 { 2382 struct ppc_elf_link_hash_entry *eh; 2383 2384 /* Has this symbol already been allocated? If so, our work is done. */ 2385 eh = (struct ppc_elf_link_hash_entry *) h; 2386 if (elf_find_pointer_linker_section (eh->linker_section_pointer, 2387 rel->r_addend, 2388 lsect)) 2389 return TRUE; 2390 2391 ptr_linker_section_ptr = &eh->linker_section_pointer; 2392 /* Make sure this symbol is output as a dynamic symbol. */ 2393 if (h->dynindx == -1) 2394 { 2395 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2396 return FALSE; 2397 } 2398 2399 if (lsect->rel_section) 2400 lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela); 2401 } 2402 else 2403 { 2404 /* Allocation of a pointer to a local symbol. */ 2405 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); 2406 2407 /* Allocate a table to hold the local symbols if first time. */ 2408 if (!ptr) 2409 { 2410 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info; 2411 2412 amt = num_symbols; 2413 amt *= sizeof (elf_linker_section_pointers_t *); 2414 ptr = bfd_zalloc (abfd, amt); 2415 2416 if (!ptr) 2417 return FALSE; 2418 2419 elf_local_ptr_offsets (abfd) = ptr; 2420 } 2421 2422 /* Has this symbol already been allocated? If so, our work is done. */ 2423 if (elf_find_pointer_linker_section (ptr[r_symndx], 2424 rel->r_addend, 2425 lsect)) 2426 return TRUE; 2427 2428 ptr_linker_section_ptr = &ptr[r_symndx]; 2429 2430 if (info->shared) 2431 { 2432 /* If we are generating a shared object, we need to 2433 output a R_<xxx>_RELATIVE reloc so that the 2434 dynamic linker can adjust this GOT entry. */ 2435 BFD_ASSERT (lsect->rel_section != NULL); 2436 lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela); 2437 } 2438 } 2439 2440 /* Allocate space for a pointer in the linker section, and allocate 2441 a new pointer record from internal memory. */ 2442 BFD_ASSERT (ptr_linker_section_ptr != NULL); 2443 amt = sizeof (elf_linker_section_pointers_t); 2444 linker_section_ptr = bfd_alloc (abfd, amt); 2445 2446 if (!linker_section_ptr) 2447 return FALSE; 2448 2449 linker_section_ptr->next = *ptr_linker_section_ptr; 2450 linker_section_ptr->addend = rel->r_addend; 2451 linker_section_ptr->lsect = lsect; 2452 linker_section_ptr->written_address_p = FALSE; 2453 *ptr_linker_section_ptr = linker_section_ptr; 2454 2455 linker_section_ptr->offset = lsect->section->_raw_size; 2456 lsect->section->_raw_size += 4; 2457 2458 #ifdef DEBUG 2459 fprintf (stderr, 2460 "Create pointer in linker section %s, offset = %ld, section size = %ld\n", 2461 lsect->name, (long) linker_section_ptr->offset, 2462 (long) lsect->section->_raw_size); 2463 #endif 2464 2465 return TRUE; 2466 } 2467 2468 #define bfd_put_ptr(BFD, VAL, ADDR) bfd_put_32 (BFD, VAL, ADDR) 2469 2470 /* Fill in the address for a pointer generated in a linker section. */ 2471 2472 static bfd_vma 2473 elf_finish_pointer_linker_section (bfd *output_bfd, 2474 bfd *input_bfd, 2475 struct bfd_link_info *info, 2476 elf_linker_section_t *lsect, 2477 struct elf_link_hash_entry *h, 2478 bfd_vma relocation, 2479 const Elf_Internal_Rela *rel, 2480 int relative_reloc) 2481 { 2482 elf_linker_section_pointers_t *linker_section_ptr; 2483 2484 BFD_ASSERT (lsect != NULL); 2485 2486 if (h != NULL) 2487 { 2488 /* Handle global symbol. */ 2489 struct ppc_elf_link_hash_entry *eh; 2490 2491 eh = (struct ppc_elf_link_hash_entry *) h; 2492 linker_section_ptr 2493 = elf_find_pointer_linker_section (eh->linker_section_pointer, 2494 rel->r_addend, 2495 lsect); 2496 2497 BFD_ASSERT (linker_section_ptr != NULL); 2498 2499 if (! elf_hash_table (info)->dynamic_sections_created 2500 || (info->shared 2501 && info->symbolic 2502 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) 2503 { 2504 /* This is actually a static link, or it is a 2505 -Bsymbolic link and the symbol is defined 2506 locally. We must initialize this entry in the 2507 global section. 2508 2509 When doing a dynamic link, we create a .rela.<xxx> 2510 relocation entry to initialize the value. This 2511 is done in the finish_dynamic_symbol routine. */ 2512 if (!linker_section_ptr->written_address_p) 2513 { 2514 linker_section_ptr->written_address_p = TRUE; 2515 bfd_put_ptr (output_bfd, 2516 relocation + linker_section_ptr->addend, 2517 (lsect->section->contents 2518 + linker_section_ptr->offset)); 2519 } 2520 } 2521 } 2522 else 2523 { 2524 /* Handle local symbol. */ 2525 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 2526 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); 2527 BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL); 2528 linker_section_ptr = (elf_find_pointer_linker_section 2529 (elf_local_ptr_offsets (input_bfd)[r_symndx], 2530 rel->r_addend, 2531 lsect)); 2532 2533 BFD_ASSERT (linker_section_ptr != NULL); 2534 2535 /* Write out pointer if it hasn't been rewritten out before. */ 2536 if (!linker_section_ptr->written_address_p) 2537 { 2538 linker_section_ptr->written_address_p = TRUE; 2539 bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend, 2540 lsect->section->contents + linker_section_ptr->offset); 2541 2542 if (info->shared) 2543 { 2544 /* We need to generate a relative reloc for the dynamic 2545 linker. */ 2546 2547 asection *srel = lsect->rel_section; 2548 Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL]; 2549 bfd_byte *erel; 2550 const struct elf_backend_data *bed; 2551 unsigned int i; 2552 2553 BFD_ASSERT (srel != NULL); 2554 2555 bed = get_elf_backend_data (output_bfd); 2556 for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) 2557 { 2558 outrel[i].r_offset = (lsect->section->output_section->vma 2559 + lsect->section->output_offset 2560 + linker_section_ptr->offset); 2561 outrel[i].r_info = 0; 2562 outrel[i].r_addend = 0; 2563 } 2564 outrel[0].r_info = ELF32_R_INFO (0, relative_reloc); 2565 erel = lsect->section->contents; 2566 erel += (elf_section_data (lsect->section)->rel_count++ 2567 * sizeof (Elf32_External_Rela)); 2568 bfd_elf32_swap_reloca_out (output_bfd, outrel, erel); 2569 } 2570 } 2571 } 2572 2573 relocation = (lsect->section->output_offset 2574 + linker_section_ptr->offset 2575 - lsect->sym_offset); 2576 2577 #ifdef DEBUG 2578 fprintf (stderr, 2579 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", 2580 lsect->name, (long) relocation, (long) relocation); 2581 #endif 2582 2583 /* Subtract out the addend, because it will get added back in by the normal 2584 processing. */ 2585 return relocation - linker_section_ptr->addend; 2586 } 2587 2588 /* Create a special linker section */ 2589 static elf_linker_section_t * 2590 ppc_elf_create_linker_section (bfd *abfd, 2591 struct bfd_link_info *info, 2592 enum elf_linker_section_enum which) 2593 { 2594 elf_linker_section_t *lsect; 2595 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 2596 asection *s; 2597 bfd_size_type amt; 2598 flagword flags; 2599 const char *name; 2600 const char *rel_name; 2601 const char *sym_name; 2602 bfd_vma sym_offset; 2603 2604 /* Both of these sections are (technically) created by the user 2605 putting data in them, so they shouldn't be marked 2606 SEC_LINKER_CREATED. 2607 2608 The linker creates them so it has somewhere to attach their 2609 respective symbols. In fact, if they were empty it would 2610 be OK to leave the symbol set to 0 (or any random number), because 2611 the appropriate register should never be used. */ 2612 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; 2613 sym_offset = 32768; 2614 2615 switch (which) 2616 { 2617 default: 2618 abort (); 2619 return NULL; 2620 2621 case LINKER_SECTION_SDATA: /* .sdata/.sbss section */ 2622 name = ".sdata"; 2623 rel_name = ".rela.sdata"; 2624 sym_name = "_SDA_BASE_"; 2625 break; 2626 2627 case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */ 2628 name = ".sdata2"; 2629 rel_name = ".rela.sdata2"; 2630 sym_name = "_SDA2_BASE_"; 2631 flags |= SEC_READONLY; 2632 break; 2633 } 2634 2635 /* Record the first bfd that needs the special sections. */ 2636 if (!htab->elf.dynobj) 2637 htab->elf.dynobj = abfd; 2638 2639 amt = sizeof (elf_linker_section_t); 2640 lsect = bfd_zalloc (htab->elf.dynobj, amt); 2641 2642 lsect->sym_offset = sym_offset; 2643 2644 /* See if the sections already exist. */ 2645 s = bfd_get_section_by_name (htab->elf.dynobj, name); 2646 if (s == NULL || (s->flags & flags) != flags) 2647 { 2648 s = bfd_make_section_anyway (htab->elf.dynobj, name); 2649 if (s == NULL 2650 || !bfd_set_section_flags (htab->elf.dynobj, s, flags)) 2651 return NULL; 2652 } 2653 lsect->section = s; 2654 2655 if (bfd_get_section_alignment (htab->elf.dynobj, s) < 2 2656 && !bfd_set_section_alignment (htab->elf.dynobj, s, 2)) 2657 return NULL; 2658 2659 s->_raw_size = align_power (s->_raw_size, 2); 2660 2661 #ifdef DEBUG 2662 fprintf (stderr, "Creating section %s, current size = %ld\n", 2663 name, (long) s->_raw_size); 2664 #endif 2665 2666 if (sym_name) 2667 { 2668 struct elf_link_hash_entry *h; 2669 struct bfd_link_hash_entry *bh; 2670 2671 #ifdef DEBUG 2672 fprintf (stderr, "Adding %s to section %s\n", sym_name, name); 2673 #endif 2674 bh = bfd_link_hash_lookup (info->hash, sym_name, 2675 FALSE, FALSE, FALSE); 2676 2677 if ((bh == NULL || bh->type == bfd_link_hash_undefined) 2678 && !(_bfd_generic_link_add_one_symbol 2679 (info, abfd, sym_name, BSF_GLOBAL, s, sym_offset, NULL, 2680 FALSE, get_elf_backend_data (abfd)->collect, &bh))) 2681 return NULL; 2682 h = (struct elf_link_hash_entry *) bh; 2683 2684 h->type = STT_OBJECT; 2685 lsect->sym_hash = h; 2686 2687 if (info->shared 2688 && ! bfd_elf_link_record_dynamic_symbol (info, h)) 2689 return NULL; 2690 } 2691 2692 if (info->shared) 2693 { 2694 s = bfd_make_section_anyway (htab->elf.dynobj, rel_name); 2695 lsect->rel_section = s; 2696 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 2697 | SEC_LINKER_CREATED | SEC_READONLY); 2698 if (s == NULL 2699 || ! bfd_set_section_flags (htab->elf.dynobj, s, flags) 2700 || ! bfd_set_section_alignment (htab->elf.dynobj, s, 2)) 2701 return NULL; 2702 } 2703 2704 return lsect; 2705 } 2706 2707 /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we 2708 need to bump up the number of section headers. */ 2709 2710 static int 2711 ppc_elf_additional_program_headers (bfd *abfd) 2712 { 2713 asection *s; 2714 int ret; 2715 2716 ret = 0; 2717 2718 s = bfd_get_section_by_name (abfd, ".interp"); 2719 if (s != NULL) 2720 ++ret; 2721 2722 s = bfd_get_section_by_name (abfd, ".sbss2"); 2723 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0) 2724 ++ret; 2725 2726 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); 2727 if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0) 2728 ++ret; 2729 2730 return ret; 2731 } 2732 2733 /* Modify the segment map if needed. */ 2734 2735 static bfd_boolean 2736 ppc_elf_modify_segment_map (bfd *abfd ATTRIBUTE_UNUSED, 2737 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2738 { 2739 return TRUE; 2740 } 2741 2742 /* The powerpc .got has a blrl instruction in it. Mark it executable. */ 2743 2744 static bfd_boolean 2745 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info) 2746 { 2747 struct ppc_elf_link_hash_table *htab; 2748 asection *s; 2749 flagword flags; 2750 2751 if (!_bfd_elf_create_got_section (abfd, info)) 2752 return FALSE; 2753 2754 htab = ppc_elf_hash_table (info); 2755 htab->got = s = bfd_get_section_by_name (abfd, ".got"); 2756 if (s == NULL) 2757 abort (); 2758 2759 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY 2760 | SEC_LINKER_CREATED); 2761 if (!bfd_set_section_flags (abfd, s, flags)) 2762 return FALSE; 2763 2764 htab->relgot = bfd_make_section (abfd, ".rela.got"); 2765 if (!htab->relgot 2766 || ! bfd_set_section_flags (abfd, htab->relgot, 2767 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 2768 | SEC_IN_MEMORY | SEC_LINKER_CREATED 2769 | SEC_READONLY)) 2770 || ! bfd_set_section_alignment (abfd, htab->relgot, 2)) 2771 return FALSE; 2772 2773 return TRUE; 2774 } 2775 2776 /* We have to create .dynsbss and .rela.sbss here so that they get mapped 2777 to output sections (just like _bfd_elf_create_dynamic_sections has 2778 to create .dynbss and .rela.bss). */ 2779 2780 static bfd_boolean 2781 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 2782 { 2783 struct ppc_elf_link_hash_table *htab; 2784 asection *s; 2785 flagword flags; 2786 2787 htab = ppc_elf_hash_table (info); 2788 2789 if (htab->got == NULL 2790 && !ppc_elf_create_got (abfd, info)) 2791 return FALSE; 2792 2793 if (!_bfd_elf_create_dynamic_sections (abfd, info)) 2794 return FALSE; 2795 2796 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 2797 | SEC_LINKER_CREATED); 2798 2799 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss"); 2800 htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss"); 2801 if (s == NULL 2802 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC)) 2803 return FALSE; 2804 2805 if (! info->shared) 2806 { 2807 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss"); 2808 htab->relsbss = s = bfd_make_section (abfd, ".rela.sbss"); 2809 if (s == NULL 2810 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) 2811 || ! bfd_set_section_alignment (abfd, s, 2)) 2812 return FALSE; 2813 } 2814 2815 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt"); 2816 htab->plt = s = bfd_get_section_by_name (abfd, ".plt"); 2817 if (s == NULL) 2818 abort (); 2819 2820 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED; 2821 return bfd_set_section_flags (abfd, s, flags); 2822 } 2823 2824 /* Adjust a symbol defined by a dynamic object and referenced by a 2825 regular object. The current definition is in some section of the 2826 dynamic object, but we're not including those sections. We have to 2827 change the definition to something the rest of the link can 2828 understand. */ 2829 2830 static bfd_boolean 2831 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 2832 struct elf_link_hash_entry *h) 2833 { 2834 struct ppc_elf_link_hash_table *htab; 2835 asection *s; 2836 unsigned int power_of_two; 2837 2838 #ifdef DEBUG 2839 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", 2840 h->root.root.string); 2841 #endif 2842 2843 /* Make sure we know what is going on here. */ 2844 htab = ppc_elf_hash_table (info); 2845 BFD_ASSERT (htab->elf.dynobj != NULL 2846 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) 2847 || h->weakdef != NULL 2848 || ((h->elf_link_hash_flags 2849 & ELF_LINK_HASH_DEF_DYNAMIC) != 0 2850 && (h->elf_link_hash_flags 2851 & ELF_LINK_HASH_REF_REGULAR) != 0 2852 && (h->elf_link_hash_flags 2853 & ELF_LINK_HASH_DEF_REGULAR) == 0))); 2854 2855 /* Deal with function syms. */ 2856 if (h->type == STT_FUNC 2857 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) 2858 { 2859 /* Clear procedure linkage table information for any symbol that 2860 won't need a .plt entry. */ 2861 if (h->plt.refcount <= 0 2862 || SYMBOL_CALLS_LOCAL (info, h) 2863 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 2864 && h->root.type == bfd_link_hash_undefweak)) 2865 { 2866 /* A PLT entry is not required/allowed when: 2867 2868 1. We are not using ld.so; because then the PLT entry 2869 can't be set up, so we can't use one. In this case, 2870 ppc_elf_adjust_dynamic_symbol won't even be called. 2871 2872 2. GC has rendered the entry unused. 2873 2874 3. We know for certain that a call to this symbol 2875 will go to this object, or will remain undefined. */ 2876 h->plt.offset = (bfd_vma) -1; 2877 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; 2878 } 2879 return TRUE; 2880 } 2881 else 2882 h->plt.offset = (bfd_vma) -1; 2883 2884 /* If this is a weak symbol, and there is a real definition, the 2885 processor independent code will have arranged for us to see the 2886 real definition first, and we can just use the same value. */ 2887 if (h->weakdef != NULL) 2888 { 2889 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined 2890 || h->weakdef->root.type == bfd_link_hash_defweak); 2891 h->root.u.def.section = h->weakdef->root.u.def.section; 2892 h->root.u.def.value = h->weakdef->root.u.def.value; 2893 if (ELIMINATE_COPY_RELOCS) 2894 h->elf_link_hash_flags 2895 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF) 2896 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF)); 2897 return TRUE; 2898 } 2899 2900 /* This is a reference to a symbol defined by a dynamic object which 2901 is not a function. */ 2902 2903 /* If we are creating a shared library, we must presume that the 2904 only references to the symbol are via the global offset table. 2905 For such cases we need not do anything here; the relocations will 2906 be handled correctly by relocate_section. */ 2907 if (info->shared) 2908 return TRUE; 2909 2910 /* If there are no references to this symbol that do not use the 2911 GOT, we don't need to generate a copy reloc. */ 2912 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) 2913 return TRUE; 2914 2915 if (ELIMINATE_COPY_RELOCS) 2916 { 2917 struct ppc_elf_dyn_relocs *p; 2918 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) 2919 { 2920 s = p->sec->output_section; 2921 if (s != NULL && (s->flags & SEC_READONLY) != 0) 2922 break; 2923 } 2924 2925 /* If we didn't find any dynamic relocs in read-only sections, then 2926 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 2927 if (p == NULL) 2928 { 2929 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; 2930 return TRUE; 2931 } 2932 } 2933 2934 /* We must allocate the symbol in our .dynbss section, which will 2935 become part of the .bss section of the executable. There will be 2936 an entry for this symbol in the .dynsym section. The dynamic 2937 object will contain position independent code, so all references 2938 from the dynamic object to this symbol will go through the global 2939 offset table. The dynamic linker will use the .dynsym entry to 2940 determine the address it must put in the global offset table, so 2941 both the dynamic object and the regular object will refer to the 2942 same memory location for the variable. 2943 2944 Of course, if the symbol is sufficiently small, we must instead 2945 allocate it in .sbss. FIXME: It would be better to do this if and 2946 only if there were actually SDAREL relocs for that symbol. */ 2947 2948 if (h->size <= elf_gp_size (htab->elf.dynobj)) 2949 s = htab->dynsbss; 2950 else 2951 s = htab->dynbss; 2952 BFD_ASSERT (s != NULL); 2953 2954 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to 2955 copy the initial value out of the dynamic object and into the 2956 runtime process image. We need to remember the offset into the 2957 .rela.bss section we are going to use. */ 2958 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) 2959 { 2960 asection *srel; 2961 2962 if (h->size <= elf_gp_size (htab->elf.dynobj)) 2963 srel = htab->relsbss; 2964 else 2965 srel = htab->relbss; 2966 BFD_ASSERT (srel != NULL); 2967 srel->_raw_size += sizeof (Elf32_External_Rela); 2968 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; 2969 } 2970 2971 /* We need to figure out the alignment required for this symbol. I 2972 have no idea how ELF linkers handle this. */ 2973 power_of_two = bfd_log2 (h->size); 2974 if (power_of_two > 4) 2975 power_of_two = 4; 2976 2977 /* Apply the required alignment. */ 2978 s->_raw_size = BFD_ALIGN (s->_raw_size, 2979 (bfd_size_type) (1 << power_of_two)); 2980 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) 2981 { 2982 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) 2983 return FALSE; 2984 } 2985 2986 /* Define the symbol as being at this point in the section. */ 2987 h->root.u.def.section = s; 2988 h->root.u.def.value = s->_raw_size; 2989 2990 /* Increment the section size to make room for the symbol. */ 2991 s->_raw_size += h->size; 2992 2993 return TRUE; 2994 } 2995 2996 /* Of those relocs that might be copied as dynamic relocs, this macro 2997 selects those that must be copied when linking a shared library, 2998 even when the symbol is local. */ 2999 3000 #define MUST_BE_DYN_RELOC(RTYPE) \ 3001 ((RTYPE) != R_PPC_REL24 \ 3002 && (RTYPE) != R_PPC_REL14 \ 3003 && (RTYPE) != R_PPC_REL14_BRTAKEN \ 3004 && (RTYPE) != R_PPC_REL14_BRNTAKEN \ 3005 && (RTYPE) != R_PPC_REL32) 3006 3007 /* Allocate space in associated reloc sections for dynamic relocs. */ 3008 3009 static bfd_boolean 3010 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) 3011 { 3012 struct bfd_link_info *info = inf; 3013 struct ppc_elf_link_hash_entry *eh; 3014 struct ppc_elf_link_hash_table *htab; 3015 struct ppc_elf_dyn_relocs *p; 3016 3017 if (h->root.type == bfd_link_hash_indirect) 3018 return TRUE; 3019 3020 if (h->root.type == bfd_link_hash_warning) 3021 /* When warning symbols are created, they **replace** the "real" 3022 entry in the hash table, thus we never get to see the real 3023 symbol in a hash traversal. So look at it now. */ 3024 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3025 3026 htab = ppc_elf_hash_table (info); 3027 if (htab->elf.dynamic_sections_created 3028 && h->plt.refcount > 0) 3029 { 3030 /* Make sure this symbol is output as a dynamic symbol. */ 3031 if (h->dynindx == -1 3032 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) 3033 { 3034 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 3035 return FALSE; 3036 } 3037 3038 if (info->shared 3039 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) 3040 { 3041 asection *s = htab->plt; 3042 3043 /* If this is the first .plt entry, make room for the special 3044 first entry. */ 3045 if (s->_raw_size == 0) 3046 s->_raw_size += PLT_INITIAL_ENTRY_SIZE; 3047 3048 /* The PowerPC PLT is actually composed of two parts, the 3049 first part is 2 words (for a load and a jump), and then 3050 there is a remaining word available at the end. */ 3051 h->plt.offset = (PLT_INITIAL_ENTRY_SIZE 3052 + (PLT_SLOT_SIZE 3053 * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) 3054 / PLT_ENTRY_SIZE))); 3055 3056 /* If this symbol is not defined in a regular file, and we 3057 are not generating a shared library, then set the symbol 3058 to this location in the .plt. This is required to make 3059 function pointers compare as equal between the normal 3060 executable and the shared library. */ 3061 if (! info->shared 3062 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) 3063 { 3064 h->root.u.def.section = s; 3065 h->root.u.def.value = h->plt.offset; 3066 } 3067 3068 /* Make room for this entry. After the 8192nd entry, room 3069 for two entries is allocated. */ 3070 s->_raw_size += PLT_ENTRY_SIZE; 3071 if ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE 3072 > PLT_NUM_SINGLE_ENTRIES) 3073 s->_raw_size += PLT_ENTRY_SIZE; 3074 3075 /* We also need to make an entry in the .rela.plt section. */ 3076 htab->relplt->_raw_size += sizeof (Elf32_External_Rela); 3077 } 3078 else 3079 { 3080 h->plt.offset = (bfd_vma) -1; 3081 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; 3082 } 3083 } 3084 else 3085 { 3086 h->plt.offset = (bfd_vma) -1; 3087 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; 3088 } 3089 3090 eh = (struct ppc_elf_link_hash_entry *) h; 3091 if (eh->elf.got.refcount > 0) 3092 { 3093 /* Make sure this symbol is output as a dynamic symbol. */ 3094 if (eh->elf.dynindx == -1 3095 && (eh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) 3096 { 3097 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf)) 3098 return FALSE; 3099 } 3100 3101 if (eh->tls_mask == (TLS_TLS | TLS_LD) 3102 && !(eh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)) 3103 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */ 3104 eh->elf.got.offset = (bfd_vma) -1; 3105 else 3106 { 3107 bfd_boolean dyn; 3108 eh->elf.got.offset = htab->got->_raw_size; 3109 if ((eh->tls_mask & TLS_TLS) != 0) 3110 { 3111 if ((eh->tls_mask & TLS_LD) != 0) 3112 htab->got->_raw_size += 8; 3113 if ((eh->tls_mask & TLS_GD) != 0) 3114 htab->got->_raw_size += 8; 3115 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0) 3116 htab->got->_raw_size += 4; 3117 if ((eh->tls_mask & TLS_DTPREL) != 0) 3118 htab->got->_raw_size += 4; 3119 } 3120 else 3121 htab->got->_raw_size += 4; 3122 dyn = htab->elf.dynamic_sections_created; 3123 if ((info->shared 3124 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf)) 3125 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT 3126 || eh->elf.root.type != bfd_link_hash_undefweak)) 3127 { 3128 /* All the entries we allocated need relocs. */ 3129 htab->relgot->_raw_size 3130 += ((htab->got->_raw_size - eh->elf.got.offset) / 4 3131 * sizeof (Elf32_External_Rela)); 3132 /* Except LD only needs one. */ 3133 if ((eh->tls_mask & TLS_LD) != 0) 3134 htab->relgot->_raw_size -= sizeof (Elf32_External_Rela); 3135 } 3136 } 3137 } 3138 else 3139 eh->elf.got.offset = (bfd_vma) -1; 3140 3141 if (eh->dyn_relocs == NULL) 3142 return TRUE; 3143 3144 /* In the shared -Bsymbolic case, discard space allocated for 3145 dynamic pc-relative relocs against symbols which turn out to be 3146 defined in regular objects. For the normal shared case, discard 3147 space for relocs that have become local due to symbol visibility 3148 changes. */ 3149 3150 if (info->shared) 3151 { 3152 /* Relocs that use pc_count are those that appear on a call insn, 3153 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be 3154 generated via assembly. We want calls to protected symbols to 3155 resolve directly to the function rather than going via the plt. 3156 If people want function pointer comparisons to work as expected 3157 then they should avoid writing weird assembly. */ 3158 if (SYMBOL_CALLS_LOCAL (info, h)) 3159 { 3160 struct ppc_elf_dyn_relocs **pp; 3161 3162 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 3163 { 3164 p->count -= p->pc_count; 3165 p->pc_count = 0; 3166 if (p->count == 0) 3167 *pp = p->next; 3168 else 3169 pp = &p->next; 3170 } 3171 } 3172 3173 /* Also discard relocs on undefined weak syms with non-default 3174 visibility. */ 3175 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 3176 && h->root.type == bfd_link_hash_undefweak) 3177 eh->dyn_relocs = NULL; 3178 3179 /* Make sure undefined weak symbols are output as a dynamic symbol 3180 in PIEs. */ 3181 if (info->pie 3182 && eh->dyn_relocs != NULL 3183 && h->dynindx == -1 3184 && h->root.type == bfd_link_hash_undefweak 3185 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) 3186 { 3187 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 3188 return FALSE; 3189 } 3190 } 3191 else if (ELIMINATE_COPY_RELOCS) 3192 { 3193 /* For the non-shared case, discard space for relocs against 3194 symbols which turn out to need copy relocs or are not 3195 dynamic. */ 3196 3197 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 3198 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 3199 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) 3200 { 3201 /* Make sure this symbol is output as a dynamic symbol. 3202 Undefined weak syms won't yet be marked as dynamic. */ 3203 if (h->dynindx == -1 3204 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) 3205 { 3206 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 3207 return FALSE; 3208 } 3209 3210 /* If that succeeded, we know we'll be keeping all the 3211 relocs. */ 3212 if (h->dynindx != -1) 3213 goto keep; 3214 } 3215 3216 eh->dyn_relocs = NULL; 3217 3218 keep: ; 3219 } 3220 3221 /* Finally, allocate space. */ 3222 for (p = eh->dyn_relocs; p != NULL; p = p->next) 3223 { 3224 asection *sreloc = elf_section_data (p->sec)->sreloc; 3225 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela); 3226 } 3227 3228 return TRUE; 3229 } 3230 3231 /* Find any dynamic relocs that apply to read-only sections. */ 3232 3233 static bfd_boolean 3234 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info) 3235 { 3236 struct ppc_elf_dyn_relocs *p; 3237 3238 if (h->root.type == bfd_link_hash_indirect) 3239 return TRUE; 3240 3241 if (h->root.type == bfd_link_hash_warning) 3242 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3243 3244 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) 3245 { 3246 asection *s = p->sec->output_section; 3247 3248 if (s != NULL 3249 && ((s->flags & (SEC_READONLY | SEC_ALLOC)) 3250 == (SEC_READONLY | SEC_ALLOC))) 3251 { 3252 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL; 3253 3254 /* Not an error, just cut short the traversal. */ 3255 return FALSE; 3256 } 3257 } 3258 return TRUE; 3259 } 3260 3261 /* Set the sizes of the dynamic sections. */ 3262 3263 static bfd_boolean 3264 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 3265 struct bfd_link_info *info) 3266 { 3267 struct ppc_elf_link_hash_table *htab; 3268 asection *s; 3269 bfd_boolean relocs; 3270 bfd *ibfd; 3271 3272 #ifdef DEBUG 3273 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); 3274 #endif 3275 3276 htab = ppc_elf_hash_table (info); 3277 BFD_ASSERT (htab->elf.dynobj != NULL); 3278 3279 if (elf_hash_table (info)->dynamic_sections_created) 3280 { 3281 /* Set the contents of the .interp section to the interpreter. */ 3282 if (info->executable) 3283 { 3284 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp"); 3285 BFD_ASSERT (s != NULL); 3286 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; 3287 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 3288 } 3289 } 3290 3291 if (htab->tlsld_got.refcount > 0) 3292 { 3293 htab->tlsld_got.offset = htab->got->_raw_size; 3294 htab->got->_raw_size += 8; 3295 if (info->shared) 3296 htab->relgot->_raw_size += sizeof (Elf32_External_Rela); 3297 } 3298 else 3299 htab->tlsld_got.offset = (bfd_vma) -1; 3300 3301 /* Set up .got offsets for local syms, and space for local dynamic 3302 relocs. */ 3303 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 3304 { 3305 bfd_signed_vma *local_got; 3306 bfd_signed_vma *end_local_got; 3307 char *lgot_masks; 3308 bfd_size_type locsymcount; 3309 Elf_Internal_Shdr *symtab_hdr; 3310 asection *srel; 3311 3312 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 3313 continue; 3314 3315 for (s = ibfd->sections; s != NULL; s = s->next) 3316 { 3317 struct ppc_elf_dyn_relocs *p; 3318 3319 for (p = ((struct ppc_elf_dyn_relocs *) 3320 elf_section_data (s)->local_dynrel); 3321 p != NULL; 3322 p = p->next) 3323 { 3324 if (!bfd_is_abs_section (p->sec) 3325 && bfd_is_abs_section (p->sec->output_section)) 3326 { 3327 /* Input section has been discarded, either because 3328 it is a copy of a linkonce section or due to 3329 linker script /DISCARD/, so we'll be discarding 3330 the relocs too. */ 3331 } 3332 else if (p->count != 0) 3333 { 3334 elf_section_data (p->sec)->sreloc->_raw_size 3335 += p->count * sizeof (Elf32_External_Rela); 3336 if ((p->sec->output_section->flags 3337 & (SEC_READONLY | SEC_ALLOC)) 3338 == (SEC_READONLY | SEC_ALLOC)) 3339 info->flags |= DF_TEXTREL; 3340 } 3341 } 3342 } 3343 3344 local_got = elf_local_got_refcounts (ibfd); 3345 if (!local_got) 3346 continue; 3347 3348 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 3349 locsymcount = symtab_hdr->sh_info; 3350 end_local_got = local_got + locsymcount; 3351 lgot_masks = (char *) end_local_got; 3352 s = htab->got; 3353 srel = htab->relgot; 3354 for (; local_got < end_local_got; ++local_got, ++lgot_masks) 3355 if (*local_got > 0) 3356 { 3357 if (*lgot_masks == (TLS_TLS | TLS_LD)) 3358 { 3359 /* If just an LD reloc, we'll just use 3360 htab->tlsld_got.offset. */ 3361 if (htab->tlsld_got.offset == (bfd_vma) -1) 3362 { 3363 htab->tlsld_got.offset = s->_raw_size; 3364 s->_raw_size += 8; 3365 if (info->shared) 3366 srel->_raw_size += sizeof (Elf32_External_Rela); 3367 } 3368 *local_got = (bfd_vma) -1; 3369 } 3370 else 3371 { 3372 *local_got = s->_raw_size; 3373 if ((*lgot_masks & TLS_TLS) != 0) 3374 { 3375 if ((*lgot_masks & TLS_GD) != 0) 3376 s->_raw_size += 8; 3377 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0) 3378 s->_raw_size += 4; 3379 if ((*lgot_masks & TLS_DTPREL) != 0) 3380 s->_raw_size += 4; 3381 } 3382 else 3383 s->_raw_size += 4; 3384 if (info->shared) 3385 srel->_raw_size += ((s->_raw_size - *local_got) / 4 3386 * sizeof (Elf32_External_Rela)); 3387 } 3388 } 3389 else 3390 *local_got = (bfd_vma) -1; 3391 } 3392 3393 /* Allocate space for global sym dynamic relocs. */ 3394 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); 3395 3396 /* We've now determined the sizes of the various dynamic sections. 3397 Allocate memory for them. */ 3398 relocs = FALSE; 3399 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next) 3400 { 3401 if ((s->flags & SEC_LINKER_CREATED) == 0) 3402 continue; 3403 3404 if (s == htab->plt 3405 || s == htab->got 3406 || (htab->sdata != NULL && s == htab->sdata->section) 3407 || (htab->sdata2 != NULL && s == htab->sdata2->section)) 3408 { 3409 /* Strip this section if we don't need it; see the 3410 comment below. */ 3411 } 3412 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) 3413 { 3414 if (s->_raw_size == 0) 3415 { 3416 /* If we don't need this section, strip it from the 3417 output file. This is mostly to handle .rela.bss and 3418 .rela.plt. We must create both sections in 3419 create_dynamic_sections, because they must be created 3420 before the linker maps input sections to output 3421 sections. The linker does that before 3422 adjust_dynamic_symbol is called, and it is that 3423 function which decides whether anything needs to go 3424 into these sections. */ 3425 } 3426 else 3427 { 3428 /* Remember whether there are any relocation sections. */ 3429 relocs = TRUE; 3430 3431 /* We use the reloc_count field as a counter if we need 3432 to copy relocs into the output file. */ 3433 s->reloc_count = 0; 3434 } 3435 } 3436 else 3437 { 3438 /* It's not one of our sections, so don't allocate space. */ 3439 continue; 3440 } 3441 3442 if (s->_raw_size == 0) 3443 { 3444 _bfd_strip_section_from_output (info, s); 3445 continue; 3446 } 3447 3448 /* Allocate memory for the section contents. */ 3449 s->contents = bfd_zalloc (htab->elf.dynobj, s->_raw_size); 3450 if (s->contents == NULL) 3451 return FALSE; 3452 } 3453 3454 if (htab->elf.dynamic_sections_created) 3455 { 3456 /* Add some entries to the .dynamic section. We fill in the 3457 values later, in ppc_elf_finish_dynamic_sections, but we 3458 must add the entries now so that we get the correct size for 3459 the .dynamic section. The DT_DEBUG entry is filled in by the 3460 dynamic linker and used by the debugger. */ 3461 #define add_dynamic_entry(TAG, VAL) \ 3462 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 3463 3464 if (info->executable) 3465 { 3466 if (!add_dynamic_entry (DT_DEBUG, 0)) 3467 return FALSE; 3468 } 3469 3470 if (htab->plt != NULL && htab->plt->_raw_size != 0) 3471 { 3472 if (!add_dynamic_entry (DT_PLTGOT, 0) 3473 || !add_dynamic_entry (DT_PLTRELSZ, 0) 3474 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 3475 || !add_dynamic_entry (DT_JMPREL, 0)) 3476 return FALSE; 3477 } 3478 3479 if (relocs) 3480 { 3481 if (!add_dynamic_entry (DT_RELA, 0) 3482 || !add_dynamic_entry (DT_RELASZ, 0) 3483 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 3484 return FALSE; 3485 } 3486 3487 /* If any dynamic relocs apply to a read-only section, then we 3488 need a DT_TEXTREL entry. */ 3489 if ((info->flags & DF_TEXTREL) == 0) 3490 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs, 3491 info); 3492 3493 if ((info->flags & DF_TEXTREL) != 0) 3494 { 3495 if (!add_dynamic_entry (DT_TEXTREL, 0)) 3496 return FALSE; 3497 } 3498 } 3499 #undef add_dynamic_entry 3500 3501 return TRUE; 3502 } 3503 3504 static bfd_boolean 3505 update_local_sym_info (bfd *abfd, 3506 Elf_Internal_Shdr *symtab_hdr, 3507 unsigned long r_symndx, 3508 int tls_type) 3509 { 3510 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); 3511 char *local_got_tls_masks; 3512 3513 if (local_got_refcounts == NULL) 3514 { 3515 bfd_size_type size = symtab_hdr->sh_info; 3516 3517 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks); 3518 local_got_refcounts = bfd_zalloc (abfd, size); 3519 if (local_got_refcounts == NULL) 3520 return FALSE; 3521 elf_local_got_refcounts (abfd) = local_got_refcounts; 3522 } 3523 3524 local_got_refcounts[r_symndx] += 1; 3525 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info); 3526 local_got_tls_masks[r_symndx] |= tls_type; 3527 return TRUE; 3528 } 3529 3530 static void 3531 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type) 3532 { 3533 (*_bfd_error_handler) 3534 (_("%s: relocation %s cannot be used when making a shared object"), 3535 bfd_archive_filename (abfd), 3536 ppc_elf_howto_table[r_type]->name); 3537 bfd_set_error (bfd_error_bad_value); 3538 } 3539 3540 /* Look through the relocs for a section during the first phase, and 3541 allocate space in the global offset table or procedure linkage 3542 table. */ 3543 3544 static bfd_boolean 3545 ppc_elf_check_relocs (bfd *abfd, 3546 struct bfd_link_info *info, 3547 asection *sec, 3548 const Elf_Internal_Rela *relocs) 3549 { 3550 struct ppc_elf_link_hash_table *htab; 3551 Elf_Internal_Shdr *symtab_hdr; 3552 struct elf_link_hash_entry **sym_hashes; 3553 const Elf_Internal_Rela *rel; 3554 const Elf_Internal_Rela *rel_end; 3555 asection *sreloc; 3556 3557 if (info->relocatable) 3558 return TRUE; 3559 3560 #ifdef DEBUG 3561 fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n", 3562 bfd_get_section_name (abfd, sec), 3563 bfd_archive_filename (abfd)); 3564 #endif 3565 3566 /* Initialize howto table if not already done. */ 3567 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 3568 ppc_elf_howto_init (); 3569 3570 /* Create the linker generated sections all the time so that the 3571 special symbols are created. */ 3572 htab = ppc_elf_hash_table (info); 3573 if (htab->sdata == NULL) 3574 { 3575 htab->sdata = ppc_elf_create_linker_section (abfd, info, 3576 LINKER_SECTION_SDATA); 3577 if (htab->sdata == NULL) 3578 return FALSE; 3579 } 3580 3581 if (htab->sdata2 == NULL) 3582 { 3583 htab->sdata2 = ppc_elf_create_linker_section (abfd, info, 3584 LINKER_SECTION_SDATA2); 3585 if (htab->sdata2 == NULL) 3586 return FALSE; 3587 } 3588 3589 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 3590 sym_hashes = elf_sym_hashes (abfd); 3591 sreloc = NULL; 3592 3593 rel_end = relocs + sec->reloc_count; 3594 for (rel = relocs; rel < rel_end; rel++) 3595 { 3596 unsigned long r_symndx; 3597 enum elf_ppc_reloc_type r_type; 3598 struct elf_link_hash_entry *h; 3599 int tls_type = 0; 3600 3601 r_symndx = ELF32_R_SYM (rel->r_info); 3602 if (r_symndx < symtab_hdr->sh_info) 3603 h = NULL; 3604 else 3605 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3606 3607 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. 3608 This shows up in particular in an R_PPC_ADDR32 in the eabi 3609 startup code. */ 3610 if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 3611 { 3612 if (htab->got == NULL) 3613 { 3614 if (htab->elf.dynobj == NULL) 3615 htab->elf.dynobj = abfd; 3616 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 3617 return FALSE; 3618 } 3619 } 3620 3621 r_type = ELF32_R_TYPE (rel->r_info); 3622 switch (r_type) 3623 { 3624 case R_PPC_GOT_TLSLD16: 3625 case R_PPC_GOT_TLSLD16_LO: 3626 case R_PPC_GOT_TLSLD16_HI: 3627 case R_PPC_GOT_TLSLD16_HA: 3628 htab->tlsld_got.refcount += 1; 3629 tls_type = TLS_TLS | TLS_LD; 3630 goto dogottls; 3631 3632 case R_PPC_GOT_TLSGD16: 3633 case R_PPC_GOT_TLSGD16_LO: 3634 case R_PPC_GOT_TLSGD16_HI: 3635 case R_PPC_GOT_TLSGD16_HA: 3636 tls_type = TLS_TLS | TLS_GD; 3637 goto dogottls; 3638 3639 case R_PPC_GOT_TPREL16: 3640 case R_PPC_GOT_TPREL16_LO: 3641 case R_PPC_GOT_TPREL16_HI: 3642 case R_PPC_GOT_TPREL16_HA: 3643 if (info->shared) 3644 info->flags |= DF_STATIC_TLS; 3645 tls_type = TLS_TLS | TLS_TPREL; 3646 goto dogottls; 3647 3648 case R_PPC_GOT_DTPREL16: 3649 case R_PPC_GOT_DTPREL16_LO: 3650 case R_PPC_GOT_DTPREL16_HI: 3651 case R_PPC_GOT_DTPREL16_HA: 3652 tls_type = TLS_TLS | TLS_DTPREL; 3653 dogottls: 3654 sec->has_tls_reloc = 1; 3655 /* Fall thru */ 3656 3657 /* GOT16 relocations */ 3658 case R_PPC_GOT16: 3659 case R_PPC_GOT16_LO: 3660 case R_PPC_GOT16_HI: 3661 case R_PPC_GOT16_HA: 3662 /* This symbol requires a global offset table entry. */ 3663 if (htab->got == NULL) 3664 { 3665 if (htab->elf.dynobj == NULL) 3666 htab->elf.dynobj = abfd; 3667 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 3668 return FALSE; 3669 } 3670 if (h != NULL) 3671 { 3672 h->got.refcount += 1; 3673 ppc_elf_hash_entry (h)->tls_mask |= tls_type; 3674 } 3675 else 3676 /* This is a global offset table entry for a local symbol. */ 3677 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)) 3678 return FALSE; 3679 break; 3680 3681 /* Indirect .sdata relocation. */ 3682 case R_PPC_EMB_SDAI16: 3683 if (info->shared) 3684 { 3685 bad_shared_reloc (abfd, r_type); 3686 return FALSE; 3687 } 3688 if (!elf_create_pointer_linker_section (abfd, info, 3689 htab->sdata, h, rel)) 3690 return FALSE; 3691 break; 3692 3693 /* Indirect .sdata2 relocation. */ 3694 case R_PPC_EMB_SDA2I16: 3695 if (info->shared) 3696 { 3697 bad_shared_reloc (abfd, r_type); 3698 return FALSE; 3699 } 3700 if (!elf_create_pointer_linker_section (abfd, info, 3701 htab->sdata2, h, rel)) 3702 return FALSE; 3703 break; 3704 3705 case R_PPC_SDAREL16: 3706 case R_PPC_EMB_SDA2REL: 3707 case R_PPC_EMB_SDA21: 3708 case R_PPC_EMB_RELSDA: 3709 case R_PPC_EMB_NADDR32: 3710 case R_PPC_EMB_NADDR16: 3711 case R_PPC_EMB_NADDR16_LO: 3712 case R_PPC_EMB_NADDR16_HI: 3713 case R_PPC_EMB_NADDR16_HA: 3714 if (info->shared) 3715 { 3716 bad_shared_reloc (abfd, r_type); 3717 return FALSE; 3718 } 3719 break; 3720 3721 case R_PPC_PLT32: 3722 case R_PPC_PLTREL24: 3723 case R_PPC_PLTREL32: 3724 case R_PPC_PLT16_LO: 3725 case R_PPC_PLT16_HI: 3726 case R_PPC_PLT16_HA: 3727 #ifdef DEBUG 3728 fprintf (stderr, "Reloc requires a PLT entry\n"); 3729 #endif 3730 /* This symbol requires a procedure linkage table entry. We 3731 actually build the entry in finish_dynamic_symbol, 3732 because this might be a case of linking PIC code without 3733 linking in any dynamic objects, in which case we don't 3734 need to generate a procedure linkage table after all. */ 3735 3736 if (h == NULL) 3737 { 3738 /* It does not make sense to have a procedure linkage 3739 table entry for a local symbol. */ 3740 (*_bfd_error_handler) (_("%s(%s+0x%lx): %s reloc against " 3741 "local symbol"), 3742 bfd_archive_filename (abfd), 3743 sec->name, 3744 (long) rel->r_offset, 3745 ppc_elf_howto_table[r_type]->name); 3746 bfd_set_error (bfd_error_bad_value); 3747 return FALSE; 3748 } 3749 3750 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; 3751 h->plt.refcount++; 3752 break; 3753 3754 /* The following relocations don't need to propagate the 3755 relocation if linking a shared object since they are 3756 section relative. */ 3757 case R_PPC_SECTOFF: 3758 case R_PPC_SECTOFF_LO: 3759 case R_PPC_SECTOFF_HI: 3760 case R_PPC_SECTOFF_HA: 3761 case R_PPC_DTPREL16: 3762 case R_PPC_DTPREL16_LO: 3763 case R_PPC_DTPREL16_HI: 3764 case R_PPC_DTPREL16_HA: 3765 case R_PPC_TOC16: 3766 break; 3767 3768 /* This are just markers. */ 3769 case R_PPC_TLS: 3770 case R_PPC_EMB_MRKREF: 3771 case R_PPC_NONE: 3772 case R_PPC_max: 3773 break; 3774 3775 /* These should only appear in dynamic objects. */ 3776 case R_PPC_COPY: 3777 case R_PPC_GLOB_DAT: 3778 case R_PPC_JMP_SLOT: 3779 case R_PPC_RELATIVE: 3780 break; 3781 3782 /* These aren't handled yet. We'll report an error later. */ 3783 case R_PPC_ADDR30: 3784 case R_PPC_EMB_RELSEC16: 3785 case R_PPC_EMB_RELST_LO: 3786 case R_PPC_EMB_RELST_HI: 3787 case R_PPC_EMB_RELST_HA: 3788 case R_PPC_EMB_BIT_FLD: 3789 break; 3790 3791 /* This refers only to functions defined in the shared library. */ 3792 case R_PPC_LOCAL24PC: 3793 break; 3794 3795 /* This relocation describes the C++ object vtable hierarchy. 3796 Reconstruct it for later use during GC. */ 3797 case R_PPC_GNU_VTINHERIT: 3798 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 3799 return FALSE; 3800 break; 3801 3802 /* This relocation describes which C++ vtable entries are actually 3803 used. Record for later use during GC. */ 3804 case R_PPC_GNU_VTENTRY: 3805 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 3806 return FALSE; 3807 break; 3808 3809 /* We shouldn't really be seeing these. */ 3810 case R_PPC_TPREL32: 3811 if (info->shared) 3812 info->flags |= DF_STATIC_TLS; 3813 goto dodyn; 3814 3815 /* Nor these. */ 3816 case R_PPC_DTPMOD32: 3817 case R_PPC_DTPREL32: 3818 goto dodyn; 3819 3820 case R_PPC_TPREL16: 3821 case R_PPC_TPREL16_LO: 3822 case R_PPC_TPREL16_HI: 3823 case R_PPC_TPREL16_HA: 3824 if (info->shared) 3825 info->flags |= DF_STATIC_TLS; 3826 goto dodyn; 3827 3828 /* When creating a shared object, we must copy these 3829 relocs into the output file. We create a reloc 3830 section in dynobj and make room for the reloc. */ 3831 case R_PPC_REL24: 3832 case R_PPC_REL14: 3833 case R_PPC_REL14_BRTAKEN: 3834 case R_PPC_REL14_BRNTAKEN: 3835 case R_PPC_REL32: 3836 if (h == NULL 3837 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 3838 break; 3839 /* fall through */ 3840 3841 case R_PPC_ADDR32: 3842 case R_PPC_ADDR24: 3843 case R_PPC_ADDR16: 3844 case R_PPC_ADDR16_LO: 3845 case R_PPC_ADDR16_HI: 3846 case R_PPC_ADDR16_HA: 3847 case R_PPC_ADDR14: 3848 case R_PPC_ADDR14_BRTAKEN: 3849 case R_PPC_ADDR14_BRNTAKEN: 3850 case R_PPC_UADDR32: 3851 case R_PPC_UADDR16: 3852 if (h != NULL && !info->shared) 3853 { 3854 /* We may need a plt entry if the symbol turns out to be 3855 a function defined in a dynamic object. */ 3856 h->plt.refcount++; 3857 3858 /* We may need a copy reloc too. */ 3859 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; 3860 } 3861 3862 dodyn: 3863 /* If we are creating a shared library, and this is a reloc 3864 against a global symbol, or a non PC relative reloc 3865 against a local symbol, then we need to copy the reloc 3866 into the shared library. However, if we are linking with 3867 -Bsymbolic, we do not need to copy a reloc against a 3868 global symbol which is defined in an object we are 3869 including in the link (i.e., DEF_REGULAR is set). At 3870 this point we have not seen all the input files, so it is 3871 possible that DEF_REGULAR is not set now but will be set 3872 later (it is never cleared). In case of a weak definition, 3873 DEF_REGULAR may be cleared later by a strong definition in 3874 a shared library. We account for that possibility below by 3875 storing information in the dyn_relocs field of the hash 3876 table entry. A similar situation occurs when creating 3877 shared libraries and symbol visibility changes render the 3878 symbol local. 3879 3880 If on the other hand, we are creating an executable, we 3881 may need to keep relocations for symbols satisfied by a 3882 dynamic library if we manage to avoid copy relocs for the 3883 symbol. */ 3884 if ((info->shared 3885 && (MUST_BE_DYN_RELOC (r_type) 3886 || (h != NULL 3887 && (! info->symbolic 3888 || h->root.type == bfd_link_hash_defweak 3889 || (h->elf_link_hash_flags 3890 & ELF_LINK_HASH_DEF_REGULAR) == 0)))) 3891 || (ELIMINATE_COPY_RELOCS 3892 && !info->shared 3893 && (sec->flags & SEC_ALLOC) != 0 3894 && h != NULL 3895 && (h->root.type == bfd_link_hash_defweak 3896 || (h->elf_link_hash_flags 3897 & ELF_LINK_HASH_DEF_REGULAR) == 0))) 3898 { 3899 struct ppc_elf_dyn_relocs *p; 3900 struct ppc_elf_dyn_relocs **head; 3901 3902 #ifdef DEBUG 3903 fprintf (stderr, 3904 "ppc_elf_check_relocs needs to " 3905 "create relocation for %s\n", 3906 (h && h->root.root.string 3907 ? h->root.root.string : "<unknown>")); 3908 #endif 3909 if (sreloc == NULL) 3910 { 3911 const char *name; 3912 3913 name = (bfd_elf_string_from_elf_section 3914 (abfd, 3915 elf_elfheader (abfd)->e_shstrndx, 3916 elf_section_data (sec)->rel_hdr.sh_name)); 3917 if (name == NULL) 3918 return FALSE; 3919 3920 BFD_ASSERT (strncmp (name, ".rela", 5) == 0 3921 && strcmp (bfd_get_section_name (abfd, sec), 3922 name + 5) == 0); 3923 3924 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name); 3925 if (sreloc == NULL) 3926 { 3927 flagword flags; 3928 3929 sreloc = bfd_make_section (htab->elf.dynobj, name); 3930 flags = (SEC_HAS_CONTENTS | SEC_READONLY 3931 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3932 if ((sec->flags & SEC_ALLOC) != 0) 3933 flags |= SEC_ALLOC | SEC_LOAD; 3934 if (sreloc == NULL 3935 || ! bfd_set_section_flags (htab->elf.dynobj, 3936 sreloc, flags) 3937 || ! bfd_set_section_alignment (htab->elf.dynobj, 3938 sreloc, 2)) 3939 return FALSE; 3940 } 3941 elf_section_data (sec)->sreloc = sreloc; 3942 } 3943 3944 /* If this is a global symbol, we count the number of 3945 relocations we need for this symbol. */ 3946 if (h != NULL) 3947 { 3948 head = &ppc_elf_hash_entry (h)->dyn_relocs; 3949 } 3950 else 3951 { 3952 /* Track dynamic relocs needed for local syms too. 3953 We really need local syms available to do this 3954 easily. Oh well. */ 3955 3956 asection *s; 3957 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, 3958 sec, r_symndx); 3959 if (s == NULL) 3960 return FALSE; 3961 3962 head = ((struct ppc_elf_dyn_relocs **) 3963 &elf_section_data (s)->local_dynrel); 3964 } 3965 3966 p = *head; 3967 if (p == NULL || p->sec != sec) 3968 { 3969 p = bfd_alloc (htab->elf.dynobj, sizeof *p); 3970 if (p == NULL) 3971 return FALSE; 3972 p->next = *head; 3973 *head = p; 3974 p->sec = sec; 3975 p->count = 0; 3976 p->pc_count = 0; 3977 } 3978 3979 p->count += 1; 3980 if (!MUST_BE_DYN_RELOC (r_type)) 3981 p->pc_count += 1; 3982 } 3983 3984 break; 3985 } 3986 } 3987 3988 return TRUE; 3989 } 3990 3991 /* Return the section that should be marked against GC for a given 3992 relocation. */ 3993 3994 static asection * 3995 ppc_elf_gc_mark_hook (asection *sec, 3996 struct bfd_link_info *info ATTRIBUTE_UNUSED, 3997 Elf_Internal_Rela *rel, 3998 struct elf_link_hash_entry *h, 3999 Elf_Internal_Sym *sym) 4000 { 4001 if (h != NULL) 4002 { 4003 switch (ELF32_R_TYPE (rel->r_info)) 4004 { 4005 case R_PPC_GNU_VTINHERIT: 4006 case R_PPC_GNU_VTENTRY: 4007 break; 4008 4009 default: 4010 switch (h->root.type) 4011 { 4012 case bfd_link_hash_defined: 4013 case bfd_link_hash_defweak: 4014 return h->root.u.def.section; 4015 4016 case bfd_link_hash_common: 4017 return h->root.u.c.p->section; 4018 4019 default: 4020 break; 4021 } 4022 } 4023 } 4024 else 4025 return bfd_section_from_elf_index (sec->owner, sym->st_shndx); 4026 4027 return NULL; 4028 } 4029 4030 /* Update the got, plt and dynamic reloc reference counts for the 4031 section being removed. */ 4032 4033 static bfd_boolean 4034 ppc_elf_gc_sweep_hook (bfd *abfd, 4035 struct bfd_link_info *info, 4036 asection *sec, 4037 const Elf_Internal_Rela *relocs) 4038 { 4039 struct ppc_elf_link_hash_table *htab; 4040 Elf_Internal_Shdr *symtab_hdr; 4041 struct elf_link_hash_entry **sym_hashes; 4042 bfd_signed_vma *local_got_refcounts; 4043 const Elf_Internal_Rela *rel, *relend; 4044 4045 elf_section_data (sec)->local_dynrel = NULL; 4046 4047 htab = ppc_elf_hash_table (info); 4048 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 4049 sym_hashes = elf_sym_hashes (abfd); 4050 local_got_refcounts = elf_local_got_refcounts (abfd); 4051 4052 relend = relocs + sec->reloc_count; 4053 for (rel = relocs; rel < relend; rel++) 4054 { 4055 unsigned long r_symndx; 4056 enum elf_ppc_reloc_type r_type; 4057 struct elf_link_hash_entry *h = NULL; 4058 4059 r_symndx = ELF32_R_SYM (rel->r_info); 4060 if (r_symndx >= symtab_hdr->sh_info) 4061 { 4062 struct ppc_elf_dyn_relocs **pp, *p; 4063 struct ppc_elf_link_hash_entry *eh; 4064 4065 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 4066 eh = (struct ppc_elf_link_hash_entry *) h; 4067 4068 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 4069 if (p->sec == sec) 4070 { 4071 /* Everything must go for SEC. */ 4072 *pp = p->next; 4073 break; 4074 } 4075 } 4076 4077 r_type = ELF32_R_TYPE (rel->r_info); 4078 switch (r_type) 4079 { 4080 case R_PPC_GOT_TLSLD16: 4081 case R_PPC_GOT_TLSLD16_LO: 4082 case R_PPC_GOT_TLSLD16_HI: 4083 case R_PPC_GOT_TLSLD16_HA: 4084 htab->tlsld_got.refcount -= 1; 4085 /* Fall thru */ 4086 4087 case R_PPC_GOT_TLSGD16: 4088 case R_PPC_GOT_TLSGD16_LO: 4089 case R_PPC_GOT_TLSGD16_HI: 4090 case R_PPC_GOT_TLSGD16_HA: 4091 case R_PPC_GOT_TPREL16: 4092 case R_PPC_GOT_TPREL16_LO: 4093 case R_PPC_GOT_TPREL16_HI: 4094 case R_PPC_GOT_TPREL16_HA: 4095 case R_PPC_GOT_DTPREL16: 4096 case R_PPC_GOT_DTPREL16_LO: 4097 case R_PPC_GOT_DTPREL16_HI: 4098 case R_PPC_GOT_DTPREL16_HA: 4099 case R_PPC_GOT16: 4100 case R_PPC_GOT16_LO: 4101 case R_PPC_GOT16_HI: 4102 case R_PPC_GOT16_HA: 4103 if (h != NULL) 4104 { 4105 if (h->got.refcount > 0) 4106 h->got.refcount--; 4107 } 4108 else if (local_got_refcounts != NULL) 4109 { 4110 if (local_got_refcounts[r_symndx] > 0) 4111 local_got_refcounts[r_symndx]--; 4112 } 4113 break; 4114 4115 case R_PPC_REL24: 4116 case R_PPC_REL14: 4117 case R_PPC_REL14_BRTAKEN: 4118 case R_PPC_REL14_BRNTAKEN: 4119 case R_PPC_REL32: 4120 if (h == NULL 4121 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 4122 break; 4123 /* Fall thru */ 4124 4125 case R_PPC_ADDR32: 4126 case R_PPC_ADDR24: 4127 case R_PPC_ADDR16: 4128 case R_PPC_ADDR16_LO: 4129 case R_PPC_ADDR16_HI: 4130 case R_PPC_ADDR16_HA: 4131 case R_PPC_ADDR14: 4132 case R_PPC_ADDR14_BRTAKEN: 4133 case R_PPC_ADDR14_BRNTAKEN: 4134 case R_PPC_UADDR32: 4135 case R_PPC_UADDR16: 4136 case R_PPC_PLT32: 4137 case R_PPC_PLTREL24: 4138 case R_PPC_PLT16_LO: 4139 case R_PPC_PLT16_HI: 4140 case R_PPC_PLT16_HA: 4141 if (h != NULL) 4142 { 4143 if (h->plt.refcount > 0) 4144 h->plt.refcount--; 4145 } 4146 break; 4147 4148 default: 4149 break; 4150 } 4151 } 4152 return TRUE; 4153 } 4154 4155 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */ 4156 4157 asection * 4158 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) 4159 { 4160 struct ppc_elf_link_hash_table *htab; 4161 4162 htab = ppc_elf_hash_table (info); 4163 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", 4164 FALSE, FALSE, TRUE); 4165 4166 return _bfd_elf_tls_setup (obfd, info); 4167 } 4168 4169 /* Run through all the TLS relocs looking for optimization 4170 opportunities. */ 4171 4172 bfd_boolean 4173 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, 4174 struct bfd_link_info *info) 4175 { 4176 bfd *ibfd; 4177 asection *sec; 4178 struct ppc_elf_link_hash_table *htab; 4179 4180 if (info->relocatable || info->shared) 4181 return TRUE; 4182 4183 htab = ppc_elf_hash_table (info); 4184 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 4185 { 4186 Elf_Internal_Sym *locsyms = NULL; 4187 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 4188 4189 for (sec = ibfd->sections; sec != NULL; sec = sec->next) 4190 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) 4191 { 4192 Elf_Internal_Rela *relstart, *rel, *relend; 4193 int expecting_tls_get_addr; 4194 4195 /* Read the relocations. */ 4196 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, 4197 info->keep_memory); 4198 if (relstart == NULL) 4199 return FALSE; 4200 4201 expecting_tls_get_addr = 0; 4202 relend = relstart + sec->reloc_count; 4203 for (rel = relstart; rel < relend; rel++) 4204 { 4205 enum elf_ppc_reloc_type r_type; 4206 unsigned long r_symndx; 4207 struct elf_link_hash_entry *h = NULL; 4208 char *tls_mask; 4209 char tls_set, tls_clear; 4210 bfd_boolean is_local; 4211 4212 r_symndx = ELF32_R_SYM (rel->r_info); 4213 if (r_symndx >= symtab_hdr->sh_info) 4214 { 4215 struct elf_link_hash_entry **sym_hashes; 4216 4217 sym_hashes = elf_sym_hashes (ibfd); 4218 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 4219 while (h->root.type == bfd_link_hash_indirect 4220 || h->root.type == bfd_link_hash_warning) 4221 h = (struct elf_link_hash_entry *) h->root.u.i.link; 4222 } 4223 4224 is_local = FALSE; 4225 if (h == NULL 4226 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)) 4227 is_local = TRUE; 4228 4229 r_type = ELF32_R_TYPE (rel->r_info); 4230 switch (r_type) 4231 { 4232 case R_PPC_GOT_TLSLD16: 4233 case R_PPC_GOT_TLSLD16_LO: 4234 case R_PPC_GOT_TLSLD16_HI: 4235 case R_PPC_GOT_TLSLD16_HA: 4236 /* These relocs should never be against a symbol 4237 defined in a shared lib. Leave them alone if 4238 that turns out to be the case. */ 4239 expecting_tls_get_addr = 0; 4240 htab->tlsld_got.refcount -= 1; 4241 if (!is_local) 4242 continue; 4243 4244 /* LD -> LE */ 4245 tls_set = 0; 4246 tls_clear = TLS_LD; 4247 expecting_tls_get_addr = 1; 4248 break; 4249 4250 case R_PPC_GOT_TLSGD16: 4251 case R_PPC_GOT_TLSGD16_LO: 4252 case R_PPC_GOT_TLSGD16_HI: 4253 case R_PPC_GOT_TLSGD16_HA: 4254 if (is_local) 4255 /* GD -> LE */ 4256 tls_set = 0; 4257 else 4258 /* GD -> IE */ 4259 tls_set = TLS_TLS | TLS_TPRELGD; 4260 tls_clear = TLS_GD; 4261 expecting_tls_get_addr = 1; 4262 break; 4263 4264 case R_PPC_GOT_TPREL16: 4265 case R_PPC_GOT_TPREL16_LO: 4266 case R_PPC_GOT_TPREL16_HI: 4267 case R_PPC_GOT_TPREL16_HA: 4268 expecting_tls_get_addr = 0; 4269 if (is_local) 4270 { 4271 /* IE -> LE */ 4272 tls_set = 0; 4273 tls_clear = TLS_TPREL; 4274 break; 4275 } 4276 else 4277 continue; 4278 4279 case R_PPC_REL14: 4280 case R_PPC_REL14_BRTAKEN: 4281 case R_PPC_REL14_BRNTAKEN: 4282 case R_PPC_REL24: 4283 if (expecting_tls_get_addr 4284 && h != NULL 4285 && h == htab->tls_get_addr) 4286 { 4287 if (h->plt.refcount > 0) 4288 h->plt.refcount -= 1; 4289 } 4290 expecting_tls_get_addr = 0; 4291 continue; 4292 4293 default: 4294 expecting_tls_get_addr = 0; 4295 continue; 4296 } 4297 4298 if (h != NULL) 4299 { 4300 if (tls_set == 0) 4301 { 4302 /* We managed to get rid of a got entry. */ 4303 if (h->got.refcount > 0) 4304 h->got.refcount -= 1; 4305 } 4306 tls_mask = &ppc_elf_hash_entry (h)->tls_mask; 4307 } 4308 else 4309 { 4310 Elf_Internal_Sym *sym; 4311 bfd_signed_vma *lgot_refs; 4312 char *lgot_masks; 4313 4314 if (locsyms == NULL) 4315 { 4316 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; 4317 if (locsyms == NULL) 4318 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, 4319 symtab_hdr->sh_info, 4320 0, NULL, NULL, NULL); 4321 if (locsyms == NULL) 4322 { 4323 if (elf_section_data (sec)->relocs != relstart) 4324 free (relstart); 4325 return FALSE; 4326 } 4327 } 4328 sym = locsyms + r_symndx; 4329 lgot_refs = elf_local_got_refcounts (ibfd); 4330 if (lgot_refs == NULL) 4331 abort (); 4332 if (tls_set == 0) 4333 { 4334 /* We managed to get rid of a got entry. */ 4335 if (lgot_refs[r_symndx] > 0) 4336 lgot_refs[r_symndx] -= 1; 4337 } 4338 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info); 4339 tls_mask = &lgot_masks[r_symndx]; 4340 } 4341 4342 *tls_mask |= tls_set; 4343 *tls_mask &= ~tls_clear; 4344 } 4345 4346 if (elf_section_data (sec)->relocs != relstart) 4347 free (relstart); 4348 } 4349 4350 if (locsyms != NULL 4351 && (symtab_hdr->contents != (unsigned char *) locsyms)) 4352 { 4353 if (!info->keep_memory) 4354 free (locsyms); 4355 else 4356 symtab_hdr->contents = (unsigned char *) locsyms; 4357 } 4358 } 4359 return TRUE; 4360 } 4361 4362 /* Hook called by the linker routine which adds symbols from an object 4363 file. We use it to put .comm items in .sbss, and not .bss. */ 4364 4365 static bfd_boolean 4366 ppc_elf_add_symbol_hook (bfd *abfd, 4367 struct bfd_link_info *info, 4368 Elf_Internal_Sym *sym, 4369 const char **namep ATTRIBUTE_UNUSED, 4370 flagword *flagsp ATTRIBUTE_UNUSED, 4371 asection **secp, 4372 bfd_vma *valp) 4373 { 4374 if (sym->st_shndx == SHN_COMMON 4375 && !info->relocatable 4376 && sym->st_size <= elf_gp_size (abfd) 4377 && (info->hash->creator == abfd->xvec 4378 || info->hash->creator == abfd->xvec->alternative_target)) 4379 { 4380 /* Common symbols less than or equal to -G nn bytes are automatically 4381 put into .sbss. */ 4382 struct ppc_elf_link_hash_table *htab; 4383 4384 htab = ppc_elf_hash_table (info); 4385 if (htab->sbss == NULL) 4386 { 4387 flagword flags = SEC_IS_COMMON; 4388 4389 htab->sbss = bfd_make_section_anyway (abfd, ".sbss"); 4390 if (htab->sbss == NULL 4391 || ! bfd_set_section_flags (abfd, htab->sbss, flags)) 4392 return FALSE; 4393 } 4394 4395 *secp = htab->sbss; 4396 *valp = sym->st_size; 4397 } 4398 4399 return TRUE; 4400 } 4401 4402 /* Finish up dynamic symbol handling. We set the contents of various 4403 dynamic sections here. */ 4404 4405 static bfd_boolean 4406 ppc_elf_finish_dynamic_symbol (bfd *output_bfd, 4407 struct bfd_link_info *info, 4408 struct elf_link_hash_entry *h, 4409 Elf_Internal_Sym *sym) 4410 { 4411 struct ppc_elf_link_hash_table *htab; 4412 4413 #ifdef DEBUG 4414 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", 4415 h->root.root.string); 4416 #endif 4417 4418 htab = ppc_elf_hash_table (info); 4419 BFD_ASSERT (htab->elf.dynobj != NULL); 4420 4421 if (h->plt.offset != (bfd_vma) -1) 4422 { 4423 Elf_Internal_Rela rela; 4424 bfd_byte *loc; 4425 bfd_vma reloc_index; 4426 4427 #ifdef DEBUG 4428 fprintf (stderr, ", plt_offset = %d", h->plt.offset); 4429 #endif 4430 4431 /* This symbol has an entry in the procedure linkage table. Set 4432 it up. */ 4433 4434 BFD_ASSERT (h->dynindx != -1); 4435 BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL); 4436 4437 /* We don't need to fill in the .plt. The ppc dynamic linker 4438 will fill it in. */ 4439 4440 /* Fill in the entry in the .rela.plt section. */ 4441 rela.r_offset = (htab->plt->output_section->vma 4442 + htab->plt->output_offset 4443 + h->plt.offset); 4444 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); 4445 rela.r_addend = 0; 4446 4447 reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE; 4448 if (reloc_index > PLT_NUM_SINGLE_ENTRIES) 4449 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; 4450 loc = (htab->relplt->contents 4451 + reloc_index * sizeof (Elf32_External_Rela)); 4452 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 4453 4454 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) 4455 { 4456 /* Mark the symbol as undefined, rather than as defined in 4457 the .plt section. Leave the value alone. */ 4458 sym->st_shndx = SHN_UNDEF; 4459 /* If the symbol is weak, we do need to clear the value. 4460 Otherwise, the PLT entry would provide a definition for 4461 the symbol even if the symbol wasn't defined anywhere, 4462 and so the symbol would never be NULL. */ 4463 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) 4464 == 0) 4465 sym->st_value = 0; 4466 } 4467 } 4468 4469 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) 4470 { 4471 asection *s; 4472 Elf_Internal_Rela rela; 4473 bfd_byte *loc; 4474 4475 /* This symbols needs a copy reloc. Set it up. */ 4476 4477 #ifdef DEBUG 4478 fprintf (stderr, ", copy"); 4479 #endif 4480 4481 BFD_ASSERT (h->dynindx != -1); 4482 4483 if (h->size <= elf_gp_size (htab->elf.dynobj)) 4484 s = htab->relsbss; 4485 else 4486 s = htab->relbss; 4487 BFD_ASSERT (s != NULL); 4488 4489 rela.r_offset = (h->root.u.def.value 4490 + h->root.u.def.section->output_section->vma 4491 + h->root.u.def.section->output_offset); 4492 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); 4493 rela.r_addend = 0; 4494 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 4495 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 4496 } 4497 4498 #ifdef DEBUG 4499 fprintf (stderr, "\n"); 4500 #endif 4501 4502 /* Mark some specially defined symbols as absolute. */ 4503 if (strcmp (h->root.root.string, "_DYNAMIC") == 0 4504 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 4505 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) 4506 sym->st_shndx = SHN_ABS; 4507 4508 return TRUE; 4509 } 4510 4511 /* Finish up the dynamic sections. */ 4512 4513 static bfd_boolean 4514 ppc_elf_finish_dynamic_sections (bfd *output_bfd, 4515 struct bfd_link_info *info) 4516 { 4517 asection *sdyn; 4518 struct ppc_elf_link_hash_table *htab; 4519 4520 #ifdef DEBUG 4521 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); 4522 #endif 4523 4524 htab = ppc_elf_hash_table (info); 4525 sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic"); 4526 4527 if (htab->elf.dynamic_sections_created) 4528 { 4529 Elf32_External_Dyn *dyncon, *dynconend; 4530 4531 BFD_ASSERT (htab->plt != NULL && sdyn != NULL); 4532 4533 dyncon = (Elf32_External_Dyn *) sdyn->contents; 4534 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); 4535 for (; dyncon < dynconend; dyncon++) 4536 { 4537 Elf_Internal_Dyn dyn; 4538 asection *s; 4539 4540 bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn); 4541 4542 switch (dyn.d_tag) 4543 { 4544 case DT_PLTGOT: 4545 s = htab->plt; 4546 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 4547 break; 4548 4549 case DT_PLTRELSZ: 4550 dyn.d_un.d_val = htab->relplt->_raw_size; 4551 break; 4552 4553 case DT_JMPREL: 4554 s = htab->relplt; 4555 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 4556 break; 4557 4558 default: 4559 continue; 4560 } 4561 4562 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 4563 } 4564 } 4565 4566 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can 4567 easily find the address of the _GLOBAL_OFFSET_TABLE_. */ 4568 if (htab->got) 4569 { 4570 unsigned char *contents = htab->got->contents; 4571 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents); 4572 4573 if (sdyn == NULL) 4574 bfd_put_32 (output_bfd, 0, contents + 4); 4575 else 4576 bfd_put_32 (output_bfd, 4577 sdyn->output_section->vma + sdyn->output_offset, 4578 contents + 4); 4579 4580 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4; 4581 } 4582 4583 return TRUE; 4584 } 4585 4586 /* The RELOCATE_SECTION function is called by the ELF backend linker 4587 to handle the relocations for a section. 4588 4589 The relocs are always passed as Rela structures; if the section 4590 actually uses Rel structures, the r_addend field will always be 4591 zero. 4592 4593 This function is responsible for adjust the section contents as 4594 necessary, and (if using Rela relocs and generating a 4595 relocatable output file) adjusting the reloc addend as 4596 necessary. 4597 4598 This function does not have to worry about setting the reloc 4599 address or the reloc symbol index. 4600 4601 LOCAL_SYMS is a pointer to the swapped in local symbols. 4602 4603 LOCAL_SECTIONS is an array giving the section in the input file 4604 corresponding to the st_shndx field of each local symbol. 4605 4606 The global hash table entry for the global symbols can be found 4607 via elf_sym_hashes (input_bfd). 4608 4609 When generating relocatable output, this function must handle 4610 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 4611 going to be the section symbol corresponding to the output 4612 section, which means that the addend must be adjusted 4613 accordingly. */ 4614 4615 static bfd_boolean 4616 ppc_elf_relocate_section (bfd *output_bfd, 4617 struct bfd_link_info *info, 4618 bfd *input_bfd, 4619 asection *input_section, 4620 bfd_byte *contents, 4621 Elf_Internal_Rela *relocs, 4622 Elf_Internal_Sym *local_syms, 4623 asection **local_sections) 4624 { 4625 Elf_Internal_Shdr *symtab_hdr; 4626 struct elf_link_hash_entry **sym_hashes; 4627 struct ppc_elf_link_hash_table *htab; 4628 Elf_Internal_Rela *rel; 4629 Elf_Internal_Rela *relend; 4630 Elf_Internal_Rela outrel; 4631 bfd_byte *loc; 4632 asection *sreloc = NULL; 4633 bfd_vma *local_got_offsets; 4634 bfd_boolean ret = TRUE; 4635 4636 #ifdef DEBUG 4637 fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, " 4638 "%ld relocations%s\n", 4639 bfd_archive_filename (input_bfd), 4640 bfd_section_name(input_bfd, input_section), 4641 (long) input_section->reloc_count, 4642 (info->relocatable) ? " (relocatable)" : ""); 4643 #endif 4644 4645 if (info->relocatable) 4646 return TRUE; 4647 4648 /* Initialize howto table if not already done. */ 4649 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 4650 ppc_elf_howto_init (); 4651 4652 htab = ppc_elf_hash_table (info); 4653 local_got_offsets = elf_local_got_offsets (input_bfd); 4654 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 4655 sym_hashes = elf_sym_hashes (input_bfd); 4656 rel = relocs; 4657 relend = relocs + input_section->reloc_count; 4658 for (; rel < relend; rel++) 4659 { 4660 enum elf_ppc_reloc_type r_type; 4661 bfd_vma addend; 4662 bfd_reloc_status_type r; 4663 Elf_Internal_Sym *sym; 4664 asection *sec; 4665 struct elf_link_hash_entry *h; 4666 const char *sym_name; 4667 reloc_howto_type *howto; 4668 unsigned long r_symndx; 4669 bfd_vma relocation; 4670 bfd_vma branch_bit, insn, from; 4671 bfd_boolean unresolved_reloc; 4672 bfd_boolean warned; 4673 unsigned int tls_type, tls_mask, tls_gd; 4674 4675 r_type = ELF32_R_TYPE (rel->r_info); 4676 sym = NULL; 4677 sec = NULL; 4678 h = NULL; 4679 unresolved_reloc = FALSE; 4680 warned = FALSE; 4681 r_symndx = ELF32_R_SYM (rel->r_info); 4682 4683 if (r_symndx < symtab_hdr->sh_info) 4684 { 4685 sym = local_syms + r_symndx; 4686 sec = local_sections[r_symndx]; 4687 sym_name = bfd_elf_local_sym_name (input_bfd, sym); 4688 4689 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 4690 } 4691 else 4692 { 4693 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 4694 r_symndx, symtab_hdr, sym_hashes, 4695 h, sec, relocation, 4696 unresolved_reloc, warned); 4697 4698 sym_name = h->root.root.string; 4699 } 4700 4701 /* TLS optimizations. Replace instruction sequences and relocs 4702 based on information we collected in tls_optimize. We edit 4703 RELOCS so that --emit-relocs will output something sensible 4704 for the final instruction stream. */ 4705 tls_mask = 0; 4706 tls_gd = 0; 4707 if (IS_PPC_TLS_RELOC (r_type)) 4708 { 4709 if (h != NULL) 4710 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask; 4711 else if (local_got_offsets != NULL) 4712 { 4713 char *lgot_masks; 4714 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info); 4715 tls_mask = lgot_masks[r_symndx]; 4716 } 4717 } 4718 4719 /* Ensure reloc mapping code below stays sane. */ 4720 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3) 4721 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3) 4722 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3) 4723 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3) 4724 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3) 4725 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3) 4726 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3) 4727 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3)) 4728 abort (); 4729 switch (r_type) 4730 { 4731 default: 4732 break; 4733 4734 case R_PPC_GOT_TPREL16: 4735 case R_PPC_GOT_TPREL16_LO: 4736 if (tls_mask != 0 4737 && (tls_mask & TLS_TPREL) == 0) 4738 { 4739 bfd_vma insn; 4740 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2); 4741 insn &= 31 << 21; 4742 insn |= 0x3c020000; /* addis 0,2,0 */ 4743 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2); 4744 r_type = R_PPC_TPREL16_HA; 4745 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 4746 } 4747 break; 4748 4749 case R_PPC_TLS: 4750 if (tls_mask != 0 4751 && (tls_mask & TLS_TPREL) == 0) 4752 { 4753 bfd_vma insn, rtra; 4754 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 4755 if ((insn & ((31 << 26) | (31 << 11))) 4756 == ((31 << 26) | (2 << 11))) 4757 rtra = insn & ((1 << 26) - (1 << 16)); 4758 else if ((insn & ((31 << 26) | (31 << 16))) 4759 == ((31 << 26) | (2 << 16))) 4760 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5); 4761 else 4762 abort (); 4763 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1) 4764 /* add -> addi. */ 4765 insn = 14 << 26; 4766 else if ((insn & (31 << 1)) == 23 << 1 4767 && ((insn & (31 << 6)) < 14 << 6 4768 || ((insn & (31 << 6)) >= 16 << 6 4769 && (insn & (31 << 6)) < 24 << 6))) 4770 /* load and store indexed -> dform. */ 4771 insn = (32 | ((insn >> 6) & 31)) << 26; 4772 else if ((insn & (31 << 1)) == 21 << 1 4773 && (insn & (0x1a << 6)) == 0) 4774 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ 4775 insn = (((58 | ((insn >> 6) & 4)) << 26) 4776 | ((insn >> 6) & 1)); 4777 else if ((insn & (31 << 1)) == 21 << 1 4778 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1) 4779 /* lwax -> lwa. */ 4780 insn = (58 << 26) | 2; 4781 else 4782 abort (); 4783 insn |= rtra; 4784 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 4785 r_type = R_PPC_TPREL16_LO; 4786 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 4787 /* Was PPC_TLS which sits on insn boundary, now 4788 PPC_TPREL16_LO which is at insn+2. */ 4789 rel->r_offset += 2; 4790 } 4791 break; 4792 4793 case R_PPC_GOT_TLSGD16_HI: 4794 case R_PPC_GOT_TLSGD16_HA: 4795 tls_gd = TLS_TPRELGD; 4796 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) 4797 goto tls_gdld_hi; 4798 break; 4799 4800 case R_PPC_GOT_TLSLD16_HI: 4801 case R_PPC_GOT_TLSLD16_HA: 4802 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) 4803 { 4804 tls_gdld_hi: 4805 if ((tls_mask & tls_gd) != 0) 4806 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 4807 + R_PPC_GOT_TPREL16); 4808 else 4809 { 4810 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); 4811 rel->r_offset -= 2; 4812 r_type = R_PPC_NONE; 4813 } 4814 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 4815 } 4816 break; 4817 4818 case R_PPC_GOT_TLSGD16: 4819 case R_PPC_GOT_TLSGD16_LO: 4820 tls_gd = TLS_TPRELGD; 4821 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) 4822 goto tls_get_addr_check; 4823 break; 4824 4825 case R_PPC_GOT_TLSLD16: 4826 case R_PPC_GOT_TLSLD16_LO: 4827 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) 4828 { 4829 tls_get_addr_check: 4830 if (rel + 1 < relend) 4831 { 4832 enum elf_ppc_reloc_type r_type2; 4833 unsigned long r_symndx2; 4834 struct elf_link_hash_entry *h2; 4835 bfd_vma insn1, insn2; 4836 bfd_vma offset; 4837 4838 /* The next instruction should be a call to 4839 __tls_get_addr. Peek at the reloc to be sure. */ 4840 r_type2 = ELF32_R_TYPE (rel[1].r_info); 4841 r_symndx2 = ELF32_R_SYM (rel[1].r_info); 4842 if (r_symndx2 < symtab_hdr->sh_info 4843 || (r_type2 != R_PPC_REL14 4844 && r_type2 != R_PPC_REL14_BRTAKEN 4845 && r_type2 != R_PPC_REL14_BRNTAKEN 4846 && r_type2 != R_PPC_REL24 4847 && r_type2 != R_PPC_PLTREL24)) 4848 break; 4849 4850 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info]; 4851 while (h2->root.type == bfd_link_hash_indirect 4852 || h2->root.type == bfd_link_hash_warning) 4853 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link; 4854 if (h2 == NULL || h2 != htab->tls_get_addr) 4855 break; 4856 4857 /* OK, it checks out. Replace the call. */ 4858 offset = rel[1].r_offset; 4859 insn1 = bfd_get_32 (output_bfd, 4860 contents + rel->r_offset - 2); 4861 if ((tls_mask & tls_gd) != 0) 4862 { 4863 /* IE */ 4864 insn1 &= (1 << 26) - 1; 4865 insn1 |= 32 << 26; /* lwz */ 4866 insn2 = 0x7c631214; /* add 3,3,2 */ 4867 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE); 4868 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 4869 + R_PPC_GOT_TPREL16); 4870 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 4871 } 4872 else 4873 { 4874 /* LE */ 4875 insn1 = 0x3c620000; /* addis 3,2,0 */ 4876 insn2 = 0x38630000; /* addi 3,3,0 */ 4877 if (tls_gd == 0) 4878 { 4879 /* Was an LD reloc. */ 4880 r_symndx = 0; 4881 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 4882 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 4883 } 4884 r_type = R_PPC_TPREL16_HA; 4885 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 4886 rel[1].r_info = ELF32_R_INFO (r_symndx, 4887 R_PPC_TPREL16_LO); 4888 rel[1].r_offset += 2; 4889 } 4890 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2); 4891 bfd_put_32 (output_bfd, insn2, contents + offset); 4892 if (tls_gd == 0) 4893 { 4894 /* We changed the symbol on an LD reloc. Start over 4895 in order to get h, sym, sec etc. right. */ 4896 rel--; 4897 continue; 4898 } 4899 } 4900 } 4901 break; 4902 } 4903 4904 /* Handle other relocations that tweak non-addend part of insn. */ 4905 branch_bit = 0; 4906 switch (r_type) 4907 { 4908 default: 4909 break; 4910 4911 /* Branch taken prediction relocations. */ 4912 case R_PPC_ADDR14_BRTAKEN: 4913 case R_PPC_REL14_BRTAKEN: 4914 branch_bit = BRANCH_PREDICT_BIT; 4915 /* Fall thru */ 4916 4917 /* Branch not taken prediction relocations. */ 4918 case R_PPC_ADDR14_BRNTAKEN: 4919 case R_PPC_REL14_BRNTAKEN: 4920 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 4921 insn &= ~BRANCH_PREDICT_BIT; 4922 insn |= branch_bit; 4923 4924 from = (rel->r_offset 4925 + input_section->output_offset 4926 + input_section->output_section->vma); 4927 4928 /* Invert 'y' bit if not the default. */ 4929 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) 4930 insn ^= BRANCH_PREDICT_BIT; 4931 4932 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 4933 break; 4934 } 4935 4936 addend = rel->r_addend; 4937 tls_type = 0; 4938 howto = NULL; 4939 if (r_type < R_PPC_max) 4940 howto = ppc_elf_howto_table[r_type]; 4941 switch (r_type) 4942 { 4943 default: 4944 (*_bfd_error_handler) 4945 (_("%s: unknown relocation type %d for symbol %s"), 4946 bfd_archive_filename (input_bfd), (int) r_type, sym_name); 4947 4948 bfd_set_error (bfd_error_bad_value); 4949 ret = FALSE; 4950 continue; 4951 4952 case R_PPC_NONE: 4953 case R_PPC_TLS: 4954 case R_PPC_EMB_MRKREF: 4955 case R_PPC_GNU_VTINHERIT: 4956 case R_PPC_GNU_VTENTRY: 4957 continue; 4958 4959 /* GOT16 relocations. Like an ADDR16 using the symbol's 4960 address in the GOT as relocation value instead of the 4961 symbol's value itself. Also, create a GOT entry for the 4962 symbol and put the symbol value there. */ 4963 case R_PPC_GOT_TLSGD16: 4964 case R_PPC_GOT_TLSGD16_LO: 4965 case R_PPC_GOT_TLSGD16_HI: 4966 case R_PPC_GOT_TLSGD16_HA: 4967 tls_type = TLS_TLS | TLS_GD; 4968 goto dogot; 4969 4970 case R_PPC_GOT_TLSLD16: 4971 case R_PPC_GOT_TLSLD16_LO: 4972 case R_PPC_GOT_TLSLD16_HI: 4973 case R_PPC_GOT_TLSLD16_HA: 4974 tls_type = TLS_TLS | TLS_LD; 4975 goto dogot; 4976 4977 case R_PPC_GOT_TPREL16: 4978 case R_PPC_GOT_TPREL16_LO: 4979 case R_PPC_GOT_TPREL16_HI: 4980 case R_PPC_GOT_TPREL16_HA: 4981 tls_type = TLS_TLS | TLS_TPREL; 4982 goto dogot; 4983 4984 case R_PPC_GOT_DTPREL16: 4985 case R_PPC_GOT_DTPREL16_LO: 4986 case R_PPC_GOT_DTPREL16_HI: 4987 case R_PPC_GOT_DTPREL16_HA: 4988 tls_type = TLS_TLS | TLS_DTPREL; 4989 goto dogot; 4990 4991 case R_PPC_GOT16: 4992 case R_PPC_GOT16_LO: 4993 case R_PPC_GOT16_HI: 4994 case R_PPC_GOT16_HA: 4995 dogot: 4996 { 4997 /* Relocation is to the entry for this symbol in the global 4998 offset table. */ 4999 bfd_vma off; 5000 bfd_vma *offp; 5001 unsigned long indx; 5002 5003 if (htab->got == NULL) 5004 abort (); 5005 5006 indx = 0; 5007 if (tls_type == (TLS_TLS | TLS_LD) 5008 && (h == NULL 5009 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))) 5010 offp = &htab->tlsld_got.offset; 5011 else if (h != NULL) 5012 { 5013 bfd_boolean dyn; 5014 dyn = htab->elf.dynamic_sections_created; 5015 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 5016 || (info->shared 5017 && SYMBOL_REFERENCES_LOCAL (info, h))) 5018 /* This is actually a static link, or it is a 5019 -Bsymbolic link and the symbol is defined 5020 locally, or the symbol was forced to be local 5021 because of a version file. */ 5022 ; 5023 else 5024 { 5025 indx = h->dynindx; 5026 unresolved_reloc = FALSE; 5027 } 5028 offp = &h->got.offset; 5029 } 5030 else 5031 { 5032 if (local_got_offsets == NULL) 5033 abort (); 5034 offp = &local_got_offsets[r_symndx]; 5035 } 5036 5037 /* The offset must always be a multiple of 4. We use the 5038 least significant bit to record whether we have already 5039 processed this entry. */ 5040 off = *offp; 5041 if ((off & 1) != 0) 5042 off &= ~1; 5043 else 5044 { 5045 unsigned int tls_m = (tls_mask 5046 & (TLS_LD | TLS_GD | TLS_DTPREL 5047 | TLS_TPREL | TLS_TPRELGD)); 5048 5049 if (offp == &htab->tlsld_got.offset) 5050 tls_m = TLS_LD; 5051 else if (h == NULL 5052 || !(h->elf_link_hash_flags 5053 & ELF_LINK_HASH_DEF_DYNAMIC)) 5054 tls_m &= ~TLS_LD; 5055 5056 /* We might have multiple got entries for this sym. 5057 Initialize them all. */ 5058 do 5059 { 5060 int tls_ty = 0; 5061 5062 if ((tls_m & TLS_LD) != 0) 5063 { 5064 tls_ty = TLS_TLS | TLS_LD; 5065 tls_m &= ~TLS_LD; 5066 } 5067 else if ((tls_m & TLS_GD) != 0) 5068 { 5069 tls_ty = TLS_TLS | TLS_GD; 5070 tls_m &= ~TLS_GD; 5071 } 5072 else if ((tls_m & TLS_DTPREL) != 0) 5073 { 5074 tls_ty = TLS_TLS | TLS_DTPREL; 5075 tls_m &= ~TLS_DTPREL; 5076 } 5077 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0) 5078 { 5079 tls_ty = TLS_TLS | TLS_TPREL; 5080 tls_m = 0; 5081 } 5082 5083 /* Generate relocs for the dynamic linker. */ 5084 if ((info->shared || indx != 0) 5085 && (h == NULL 5086 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 5087 || h->root.type != bfd_link_hash_undefweak)) 5088 { 5089 outrel.r_offset = (htab->got->output_section->vma 5090 + htab->got->output_offset 5091 + off); 5092 outrel.r_addend = 0; 5093 if (tls_ty & (TLS_LD | TLS_GD)) 5094 { 5095 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32); 5096 if (tls_ty == (TLS_TLS | TLS_GD)) 5097 { 5098 loc = htab->relgot->contents; 5099 loc += (htab->relgot->reloc_count++ 5100 * sizeof (Elf32_External_Rela)); 5101 bfd_elf32_swap_reloca_out (output_bfd, 5102 &outrel, loc); 5103 outrel.r_offset += 4; 5104 outrel.r_info 5105 = ELF32_R_INFO (indx, R_PPC_DTPREL32); 5106 } 5107 } 5108 else if (tls_ty == (TLS_TLS | TLS_DTPREL)) 5109 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32); 5110 else if (tls_ty == (TLS_TLS | TLS_TPREL)) 5111 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32); 5112 else if (indx == 0) 5113 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE); 5114 else 5115 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT); 5116 if (indx == 0) 5117 { 5118 outrel.r_addend += relocation; 5119 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL)) 5120 outrel.r_addend -= htab->elf.tls_sec->vma; 5121 } 5122 loc = htab->relgot->contents; 5123 loc += (htab->relgot->reloc_count++ 5124 * sizeof (Elf32_External_Rela)); 5125 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 5126 } 5127 5128 /* Init the .got section contents if we're not 5129 emitting a reloc. */ 5130 else 5131 { 5132 bfd_vma value = relocation; 5133 5134 if (tls_ty == (TLS_TLS | TLS_LD)) 5135 value = 1; 5136 else if (tls_ty != 0) 5137 { 5138 value -= htab->elf.tls_sec->vma + DTP_OFFSET; 5139 if (tls_ty == (TLS_TLS | TLS_TPREL)) 5140 value += DTP_OFFSET - TP_OFFSET; 5141 5142 if (tls_ty == (TLS_TLS | TLS_GD)) 5143 { 5144 bfd_put_32 (output_bfd, value, 5145 htab->got->contents + off + 4); 5146 value = 1; 5147 } 5148 } 5149 bfd_put_32 (output_bfd, value, 5150 htab->got->contents + off); 5151 } 5152 5153 off += 4; 5154 if (tls_ty & (TLS_LD | TLS_GD)) 5155 off += 4; 5156 } 5157 while (tls_m != 0); 5158 5159 off = *offp; 5160 *offp = off | 1; 5161 } 5162 5163 if (off >= (bfd_vma) -2) 5164 abort (); 5165 5166 if ((tls_type & TLS_TLS) != 0) 5167 { 5168 if (tls_type != (TLS_TLS | TLS_LD)) 5169 { 5170 if ((tls_mask & TLS_LD) != 0 5171 && !(h == NULL 5172 || !(h->elf_link_hash_flags 5173 & ELF_LINK_HASH_DEF_DYNAMIC))) 5174 off += 8; 5175 if (tls_type != (TLS_TLS | TLS_GD)) 5176 { 5177 if ((tls_mask & TLS_GD) != 0) 5178 off += 8; 5179 if (tls_type != (TLS_TLS | TLS_DTPREL)) 5180 { 5181 if ((tls_mask & TLS_DTPREL) != 0) 5182 off += 4; 5183 } 5184 } 5185 } 5186 } 5187 5188 relocation = htab->got->output_offset + off - 4; 5189 5190 /* Addends on got relocations don't make much sense. 5191 x+off@got is actually x@got+off, and since the got is 5192 generated by a hash table traversal, the value in the 5193 got at entry m+n bears little relation to the entry m. */ 5194 if (addend != 0) 5195 (*_bfd_error_handler) 5196 (_("%s(%s+0x%lx): non-zero addend on %s reloc against `%s'"), 5197 bfd_archive_filename (input_bfd), 5198 bfd_get_section_name (input_bfd, input_section), 5199 (long) rel->r_offset, 5200 howto->name, 5201 sym_name); 5202 } 5203 break; 5204 5205 /* Relocations that need no special processing. */ 5206 case R_PPC_LOCAL24PC: 5207 /* It makes no sense to point a local relocation 5208 at a symbol not in this object. */ 5209 if (unresolved_reloc) 5210 { 5211 if (! (*info->callbacks->undefined_symbol) (info, 5212 h->root.root.string, 5213 input_bfd, 5214 input_section, 5215 rel->r_offset, 5216 TRUE)) 5217 return FALSE; 5218 continue; 5219 } 5220 break; 5221 5222 case R_PPC_DTPREL16: 5223 case R_PPC_DTPREL16_LO: 5224 case R_PPC_DTPREL16_HI: 5225 case R_PPC_DTPREL16_HA: 5226 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 5227 break; 5228 5229 /* Relocations that may need to be propagated if this is a shared 5230 object. */ 5231 case R_PPC_TPREL16: 5232 case R_PPC_TPREL16_LO: 5233 case R_PPC_TPREL16_HI: 5234 case R_PPC_TPREL16_HA: 5235 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 5236 /* The TPREL16 relocs shouldn't really be used in shared 5237 libs as they will result in DT_TEXTREL being set, but 5238 support them anyway. */ 5239 goto dodyn; 5240 5241 case R_PPC_TPREL32: 5242 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 5243 goto dodyn; 5244 5245 case R_PPC_DTPREL32: 5246 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 5247 goto dodyn; 5248 5249 case R_PPC_DTPMOD32: 5250 relocation = 1; 5251 addend = 0; 5252 goto dodyn; 5253 5254 case R_PPC_REL24: 5255 case R_PPC_REL32: 5256 case R_PPC_REL14: 5257 case R_PPC_REL14_BRTAKEN: 5258 case R_PPC_REL14_BRNTAKEN: 5259 /* If these relocations are not to a named symbol, they can be 5260 handled right here, no need to bother the dynamic linker. */ 5261 if (SYMBOL_REFERENCES_LOCAL (info, h) 5262 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 5263 break; 5264 /* fall through */ 5265 5266 /* Relocations that always need to be propagated if this is a shared 5267 object. */ 5268 case R_PPC_ADDR32: 5269 case R_PPC_ADDR24: 5270 case R_PPC_ADDR16: 5271 case R_PPC_ADDR16_LO: 5272 case R_PPC_ADDR16_HI: 5273 case R_PPC_ADDR16_HA: 5274 case R_PPC_ADDR14: 5275 case R_PPC_ADDR14_BRTAKEN: 5276 case R_PPC_ADDR14_BRNTAKEN: 5277 case R_PPC_UADDR32: 5278 case R_PPC_UADDR16: 5279 /* r_symndx will be zero only for relocs against symbols 5280 from removed linkonce sections, or sections discarded by 5281 a linker script. */ 5282 dodyn: 5283 if (r_symndx == 0) 5284 break; 5285 /* Fall thru. */ 5286 5287 if ((info->shared 5288 && (h == NULL 5289 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 5290 || h->root.type != bfd_link_hash_undefweak) 5291 && (MUST_BE_DYN_RELOC (r_type) 5292 || !SYMBOL_CALLS_LOCAL (info, h))) 5293 || (ELIMINATE_COPY_RELOCS 5294 && !info->shared 5295 && (input_section->flags & SEC_ALLOC) != 0 5296 && h != NULL 5297 && h->dynindx != -1 5298 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 5299 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 5300 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)) 5301 { 5302 int skip; 5303 5304 #ifdef DEBUG 5305 fprintf (stderr, "ppc_elf_relocate_section needs to " 5306 "create relocation for %s\n", 5307 (h && h->root.root.string 5308 ? h->root.root.string : "<unknown>")); 5309 #endif 5310 5311 /* When generating a shared object, these relocations 5312 are copied into the output file to be resolved at run 5313 time. */ 5314 if (sreloc == NULL) 5315 { 5316 const char *name; 5317 5318 name = (bfd_elf_string_from_elf_section 5319 (input_bfd, 5320 elf_elfheader (input_bfd)->e_shstrndx, 5321 elf_section_data (input_section)->rel_hdr.sh_name)); 5322 if (name == NULL) 5323 return FALSE; 5324 5325 BFD_ASSERT (strncmp (name, ".rela", 5) == 0 5326 && strcmp (bfd_get_section_name (input_bfd, 5327 input_section), 5328 name + 5) == 0); 5329 5330 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name); 5331 BFD_ASSERT (sreloc != NULL); 5332 } 5333 5334 skip = 0; 5335 5336 outrel.r_offset = 5337 _bfd_elf_section_offset (output_bfd, info, input_section, 5338 rel->r_offset); 5339 if (outrel.r_offset == (bfd_vma) -1 5340 || outrel.r_offset == (bfd_vma) -2) 5341 skip = (int) outrel.r_offset; 5342 outrel.r_offset += (input_section->output_section->vma 5343 + input_section->output_offset); 5344 5345 if (skip) 5346 memset (&outrel, 0, sizeof outrel); 5347 else if (!SYMBOL_REFERENCES_LOCAL (info, h)) 5348 { 5349 unresolved_reloc = FALSE; 5350 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 5351 outrel.r_addend = rel->r_addend; 5352 } 5353 else 5354 { 5355 outrel.r_addend = relocation + rel->r_addend; 5356 5357 if (r_type == R_PPC_ADDR32) 5358 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); 5359 else 5360 { 5361 long indx; 5362 5363 if (bfd_is_abs_section (sec)) 5364 indx = 0; 5365 else if (sec == NULL || sec->owner == NULL) 5366 { 5367 bfd_set_error (bfd_error_bad_value); 5368 return FALSE; 5369 } 5370 else 5371 { 5372 asection *osec; 5373 5374 /* We are turning this relocation into one 5375 against a section symbol. It would be 5376 proper to subtract the symbol's value, 5377 osec->vma, from the emitted reloc addend, 5378 but ld.so expects buggy relocs. */ 5379 osec = sec->output_section; 5380 indx = elf_section_data (osec)->dynindx; 5381 BFD_ASSERT (indx > 0); 5382 #ifdef DEBUG 5383 if (indx <= 0) 5384 printf ("indx=%d section=%s flags=%08x name=%s\n", 5385 indx, osec->name, osec->flags, 5386 h->root.root.string); 5387 #endif 5388 } 5389 5390 outrel.r_info = ELF32_R_INFO (indx, r_type); 5391 } 5392 } 5393 5394 loc = sreloc->contents; 5395 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 5396 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 5397 5398 if (skip == -1) 5399 continue; 5400 5401 /* This reloc will be computed at runtime. We clear the memory 5402 so that it contains predictable value. */ 5403 if (! skip 5404 && ((input_section->flags & SEC_ALLOC) != 0 5405 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE)) 5406 { 5407 relocation = howto->pc_relative ? outrel.r_offset : 0; 5408 addend = 0; 5409 break; 5410 } 5411 } 5412 break; 5413 5414 case R_PPC_RELAX32PC: 5415 relocation -= (input_section->output_section->vma 5416 + input_section->output_offset 5417 + rel->r_offset - 4); 5418 /* Fall thru */ 5419 case R_PPC_RELAX32: 5420 { 5421 unsigned long t0; 5422 unsigned long t1; 5423 5424 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset); 5425 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4); 5426 5427 /* We're clearing the bits for R_PPC_ADDR16_HA 5428 and R_PPC_ADDR16_LO here. */ 5429 t0 &= ~0xffff; 5430 t1 &= ~0xffff; 5431 5432 /* t0 is HA, t1 is LO */ 5433 relocation += addend; 5434 t0 |= ((relocation + 0x8000) >> 16) & 0xffff; 5435 t1 |= relocation & 0xffff; 5436 5437 bfd_put_32 (output_bfd, t0, contents + rel->r_offset); 5438 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4); 5439 } 5440 continue; 5441 5442 /* Indirect .sdata relocation. */ 5443 case R_PPC_EMB_SDAI16: 5444 BFD_ASSERT (htab->sdata != NULL); 5445 relocation 5446 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info, 5447 htab->sdata, h, relocation, 5448 rel, R_PPC_RELATIVE); 5449 break; 5450 5451 /* Indirect .sdata2 relocation. */ 5452 case R_PPC_EMB_SDA2I16: 5453 BFD_ASSERT (htab->sdata2 != NULL); 5454 relocation 5455 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info, 5456 htab->sdata2, h, relocation, 5457 rel, R_PPC_RELATIVE); 5458 break; 5459 5460 /* Handle the TOC16 reloc. We want to use the offset within the .got 5461 section, not the actual VMA. This is appropriate when generating 5462 an embedded ELF object, for which the .got section acts like the 5463 AIX .toc section. */ 5464 case R_PPC_TOC16: /* phony GOT16 relocations */ 5465 BFD_ASSERT (sec != NULL); 5466 BFD_ASSERT (bfd_is_und_section (sec) 5467 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0 5468 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0) 5469 5470 addend -= sec->output_section->vma + sec->output_offset + 0x8000; 5471 break; 5472 5473 case R_PPC_PLTREL24: 5474 /* Relocation is to the entry for this symbol in the 5475 procedure linkage table. */ 5476 BFD_ASSERT (h != NULL); 5477 5478 if (h->plt.offset == (bfd_vma) -1 5479 || htab->plt == NULL) 5480 { 5481 /* We didn't make a PLT entry for this symbol. This 5482 happens when statically linking PIC code, or when 5483 using -Bsymbolic. */ 5484 break; 5485 } 5486 5487 unresolved_reloc = FALSE; 5488 relocation = (htab->plt->output_section->vma 5489 + htab->plt->output_offset 5490 + h->plt.offset); 5491 break; 5492 5493 /* Relocate against _SDA_BASE_. */ 5494 case R_PPC_SDAREL16: 5495 { 5496 const char *name; 5497 const struct elf_link_hash_entry *sh; 5498 5499 BFD_ASSERT (sec != NULL); 5500 name = bfd_get_section_name (abfd, sec->output_section); 5501 if (! ((strncmp (name, ".sdata", 6) == 0 5502 && (name[6] == 0 || name[6] == '.')) 5503 || (strncmp (name, ".sbss", 5) == 0 5504 && (name[5] == 0 || name[5] == '.')))) 5505 { 5506 (*_bfd_error_handler) 5507 (_("%s: the target (%s) of a %s relocation is " 5508 "in the wrong output section (%s)"), 5509 bfd_archive_filename (input_bfd), 5510 sym_name, 5511 howto->name, 5512 name); 5513 } 5514 sh = htab->sdata->sym_hash; 5515 addend -= (sh->root.u.def.value 5516 + sh->root.u.def.section->output_section->vma 5517 + sh->root.u.def.section->output_offset); 5518 } 5519 break; 5520 5521 /* Relocate against _SDA2_BASE_. */ 5522 case R_PPC_EMB_SDA2REL: 5523 { 5524 const char *name; 5525 const struct elf_link_hash_entry *sh; 5526 5527 BFD_ASSERT (sec != NULL); 5528 name = bfd_get_section_name (abfd, sec->output_section); 5529 if (! (strncmp (name, ".sdata2", 7) == 0 5530 || strncmp (name, ".sbss2", 6) == 0)) 5531 { 5532 (*_bfd_error_handler) 5533 (_("%s: the target (%s) of a %s relocation is " 5534 "in the wrong output section (%s)"), 5535 bfd_archive_filename (input_bfd), 5536 sym_name, 5537 howto->name, 5538 name); 5539 5540 bfd_set_error (bfd_error_bad_value); 5541 ret = FALSE; 5542 continue; 5543 } 5544 sh = htab->sdata2->sym_hash; 5545 addend -= (sh->root.u.def.value 5546 + sh->root.u.def.section->output_section->vma 5547 + sh->root.u.def.section->output_offset); 5548 } 5549 break; 5550 5551 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */ 5552 case R_PPC_EMB_SDA21: 5553 case R_PPC_EMB_RELSDA: 5554 { 5555 const char *name; 5556 const struct elf_link_hash_entry *sh; 5557 int reg; 5558 5559 BFD_ASSERT (sec != NULL); 5560 name = bfd_get_section_name (abfd, sec->output_section); 5561 if (((strncmp (name, ".sdata", 6) == 0 5562 && (name[6] == 0 || name[6] == '.')) 5563 || (strncmp (name, ".sbss", 5) == 0 5564 && (name[5] == 0 || name[5] == '.')))) 5565 { 5566 reg = 13; 5567 sh = htab->sdata->sym_hash; 5568 addend -= (sh->root.u.def.value 5569 + sh->root.u.def.section->output_section->vma 5570 + sh->root.u.def.section->output_offset); 5571 } 5572 5573 else if (strncmp (name, ".sdata2", 7) == 0 5574 || strncmp (name, ".sbss2", 6) == 0) 5575 { 5576 reg = 2; 5577 sh = htab->sdata2->sym_hash; 5578 addend -= (sh->root.u.def.value 5579 + sh->root.u.def.section->output_section->vma 5580 + sh->root.u.def.section->output_offset); 5581 } 5582 5583 else if (strcmp (name, ".PPC.EMB.sdata0") == 0 5584 || strcmp (name, ".PPC.EMB.sbss0") == 0) 5585 { 5586 reg = 0; 5587 } 5588 5589 else 5590 { 5591 (*_bfd_error_handler) 5592 (_("%s: the target (%s) of a %s relocation is " 5593 "in the wrong output section (%s)"), 5594 bfd_archive_filename (input_bfd), 5595 sym_name, 5596 howto->name, 5597 name); 5598 5599 bfd_set_error (bfd_error_bad_value); 5600 ret = FALSE; 5601 continue; 5602 } 5603 5604 if (r_type == R_PPC_EMB_SDA21) 5605 { /* fill in register field */ 5606 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 5607 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); 5608 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 5609 } 5610 } 5611 break; 5612 5613 /* Relocate against the beginning of the section. */ 5614 case R_PPC_SECTOFF: 5615 case R_PPC_SECTOFF_LO: 5616 case R_PPC_SECTOFF_HI: 5617 case R_PPC_SECTOFF_HA: 5618 BFD_ASSERT (sec != NULL); 5619 addend -= sec->output_section->vma; 5620 break; 5621 5622 /* Negative relocations. */ 5623 case R_PPC_EMB_NADDR32: 5624 case R_PPC_EMB_NADDR16: 5625 case R_PPC_EMB_NADDR16_LO: 5626 case R_PPC_EMB_NADDR16_HI: 5627 case R_PPC_EMB_NADDR16_HA: 5628 addend -= 2 * relocation; 5629 break; 5630 5631 case R_PPC_COPY: 5632 case R_PPC_GLOB_DAT: 5633 case R_PPC_JMP_SLOT: 5634 case R_PPC_RELATIVE: 5635 case R_PPC_PLT32: 5636 case R_PPC_PLTREL32: 5637 case R_PPC_PLT16_LO: 5638 case R_PPC_PLT16_HI: 5639 case R_PPC_PLT16_HA: 5640 case R_PPC_ADDR30: 5641 case R_PPC_EMB_RELSEC16: 5642 case R_PPC_EMB_RELST_LO: 5643 case R_PPC_EMB_RELST_HI: 5644 case R_PPC_EMB_RELST_HA: 5645 case R_PPC_EMB_BIT_FLD: 5646 (*_bfd_error_handler) 5647 (_("%s: relocation %s is not yet supported for symbol %s."), 5648 bfd_archive_filename (input_bfd), 5649 howto->name, 5650 sym_name); 5651 5652 bfd_set_error (bfd_error_invalid_operation); 5653 ret = FALSE; 5654 continue; 5655 } 5656 5657 /* Do any further special processing. */ 5658 switch (r_type) 5659 { 5660 default: 5661 break; 5662 5663 case R_PPC_ADDR16_HA: 5664 case R_PPC_GOT16_HA: 5665 case R_PPC_PLT16_HA: 5666 case R_PPC_SECTOFF_HA: 5667 case R_PPC_TPREL16_HA: 5668 case R_PPC_DTPREL16_HA: 5669 case R_PPC_GOT_TLSGD16_HA: 5670 case R_PPC_GOT_TLSLD16_HA: 5671 case R_PPC_GOT_TPREL16_HA: 5672 case R_PPC_GOT_DTPREL16_HA: 5673 case R_PPC_EMB_NADDR16_HA: 5674 case R_PPC_EMB_RELST_HA: 5675 /* It's just possible that this symbol is a weak symbol 5676 that's not actually defined anywhere. In that case, 5677 'sec' would be NULL, and we should leave the symbol 5678 alone (it will be set to zero elsewhere in the link). */ 5679 if (sec != NULL) 5680 /* Add 0x10000 if sign bit in 0:15 is set. 5681 Bits 0:15 are not used. */ 5682 addend += 0x8000; 5683 break; 5684 } 5685 5686 #ifdef DEBUG 5687 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, " 5688 "offset = %ld, addend = %ld\n", 5689 howto->name, 5690 (int) r_type, 5691 sym_name, 5692 r_symndx, 5693 (long) rel->r_offset, 5694 (long) addend); 5695 #endif 5696 5697 if (unresolved_reloc 5698 && !((input_section->flags & SEC_DEBUGGING) != 0 5699 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) 5700 { 5701 (*_bfd_error_handler) 5702 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"), 5703 bfd_archive_filename (input_bfd), 5704 bfd_get_section_name (input_bfd, input_section), 5705 (long) rel->r_offset, 5706 howto->name, 5707 sym_name); 5708 ret = FALSE; 5709 } 5710 5711 r = _bfd_final_link_relocate (howto, 5712 input_bfd, 5713 input_section, 5714 contents, 5715 rel->r_offset, 5716 relocation, 5717 addend); 5718 5719 if (r != bfd_reloc_ok) 5720 { 5721 if (sym_name == NULL) 5722 sym_name = "(null)"; 5723 if (r == bfd_reloc_overflow) 5724 { 5725 if (warned) 5726 continue; 5727 if (h != NULL 5728 && h->root.type == bfd_link_hash_undefweak 5729 && howto->pc_relative) 5730 { 5731 /* Assume this is a call protected by other code that 5732 detect the symbol is undefined. If this is the case, 5733 we can safely ignore the overflow. If not, the 5734 program is hosed anyway, and a little warning isn't 5735 going to help. */ 5736 5737 continue; 5738 } 5739 5740 if (! (*info->callbacks->reloc_overflow) (info, 5741 sym_name, 5742 howto->name, 5743 rel->r_addend, 5744 input_bfd, 5745 input_section, 5746 rel->r_offset)) 5747 return FALSE; 5748 } 5749 else 5750 { 5751 (*_bfd_error_handler) 5752 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"), 5753 bfd_archive_filename (input_bfd), 5754 bfd_get_section_name (input_bfd, input_section), 5755 (long) rel->r_offset, howto->name, sym_name, (int) r); 5756 ret = FALSE; 5757 } 5758 } 5759 } 5760 5761 #ifdef DEBUG 5762 fprintf (stderr, "\n"); 5763 #endif 5764 5765 return ret; 5766 } 5767 5768 static enum elf_reloc_type_class 5769 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela) 5770 { 5771 switch (ELF32_R_TYPE (rela->r_info)) 5772 { 5773 case R_PPC_RELATIVE: 5774 return reloc_class_relative; 5775 case R_PPC_REL24: 5776 case R_PPC_ADDR24: 5777 case R_PPC_JMP_SLOT: 5778 return reloc_class_plt; 5779 case R_PPC_COPY: 5780 return reloc_class_copy; 5781 default: 5782 return reloc_class_normal; 5783 } 5784 } 5785 5786 /* Support for core dump NOTE sections. */ 5787 5788 static bfd_boolean 5789 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 5790 { 5791 int offset; 5792 unsigned int raw_size; 5793 5794 switch (note->descsz) 5795 { 5796 default: 5797 return FALSE; 5798 5799 case 268: /* Linux/PPC. */ 5800 /* pr_cursig */ 5801 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); 5802 5803 /* pr_pid */ 5804 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); 5805 5806 /* pr_reg */ 5807 offset = 72; 5808 raw_size = 192; 5809 5810 break; 5811 } 5812 5813 /* Make a ".reg/999" section. */ 5814 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 5815 raw_size, note->descpos + offset); 5816 } 5817 5818 static bfd_boolean 5819 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 5820 { 5821 switch (note->descsz) 5822 { 5823 default: 5824 return FALSE; 5825 5826 case 128: /* Linux/PPC elf_prpsinfo. */ 5827 elf_tdata (abfd)->core_program 5828 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); 5829 elf_tdata (abfd)->core_command 5830 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); 5831 } 5832 5833 /* Note that for some reason, a spurious space is tacked 5834 onto the end of the args in some (at least one anyway) 5835 implementations, so strip it off if it exists. */ 5836 5837 { 5838 char *command = elf_tdata (abfd)->core_command; 5839 int n = strlen (command); 5840 5841 if (0 < n && command[n - 1] == ' ') 5842 command[n - 1] = '\0'; 5843 } 5844 5845 return TRUE; 5846 } 5847 5848 /* Very simple linked list structure for recording apuinfo values. */ 5849 typedef struct apuinfo_list 5850 { 5851 struct apuinfo_list *next; 5852 unsigned long value; 5853 } 5854 apuinfo_list; 5855 5856 static apuinfo_list *head; 5857 5858 5859 static void 5860 apuinfo_list_init (void) 5861 { 5862 head = NULL; 5863 } 5864 5865 static void 5866 apuinfo_list_add (unsigned long value) 5867 { 5868 apuinfo_list *entry = head; 5869 5870 while (entry != NULL) 5871 { 5872 if (entry->value == value) 5873 return; 5874 entry = entry->next; 5875 } 5876 5877 entry = bfd_malloc (sizeof (* entry)); 5878 if (entry == NULL) 5879 return; 5880 5881 entry->value = value; 5882 entry->next = head; 5883 head = entry; 5884 } 5885 5886 static unsigned 5887 apuinfo_list_length (void) 5888 { 5889 apuinfo_list *entry; 5890 unsigned long count; 5891 5892 for (entry = head, count = 0; 5893 entry; 5894 entry = entry->next) 5895 ++ count; 5896 5897 return count; 5898 } 5899 5900 static inline unsigned long 5901 apuinfo_list_element (unsigned long number) 5902 { 5903 apuinfo_list * entry; 5904 5905 for (entry = head; 5906 entry && number --; 5907 entry = entry->next) 5908 ; 5909 5910 return entry ? entry->value : 0; 5911 } 5912 5913 static void 5914 apuinfo_list_finish (void) 5915 { 5916 apuinfo_list *entry; 5917 5918 for (entry = head; entry;) 5919 { 5920 apuinfo_list *next = entry->next; 5921 free (entry); 5922 entry = next; 5923 } 5924 5925 head = NULL; 5926 } 5927 5928 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo" 5929 #define APUINFO_LABEL "APUinfo" 5930 5931 /* Scan the input BFDs and create a linked list of 5932 the APUinfo values that will need to be emitted. */ 5933 5934 static void 5935 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info) 5936 { 5937 bfd *ibfd; 5938 asection *asec; 5939 char *buffer; 5940 unsigned num_input_sections; 5941 bfd_size_type output_section_size; 5942 unsigned i; 5943 unsigned num_entries; 5944 unsigned long offset; 5945 unsigned long length; 5946 const char *error_message = NULL; 5947 5948 if (link_info == NULL) 5949 return; 5950 5951 /* Scan the input bfds, looking for apuinfo sections. */ 5952 num_input_sections = 0; 5953 output_section_size = 0; 5954 5955 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) 5956 { 5957 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); 5958 if (asec) 5959 { 5960 ++ num_input_sections; 5961 output_section_size += asec->_raw_size; 5962 } 5963 } 5964 5965 /* We need at least one input sections 5966 in order to make merging worthwhile. */ 5967 if (num_input_sections < 1) 5968 return; 5969 5970 /* Just make sure that the output section exists as well. */ 5971 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 5972 if (asec == NULL) 5973 return; 5974 5975 /* Allocate a buffer for the contents of the input sections. */ 5976 buffer = bfd_malloc (output_section_size); 5977 if (buffer == NULL) 5978 return; 5979 5980 offset = 0; 5981 apuinfo_list_init (); 5982 5983 /* Read in the input sections contents. */ 5984 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) 5985 { 5986 unsigned long datum; 5987 char *ptr; 5988 5989 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); 5990 if (asec == NULL) 5991 continue; 5992 5993 length = asec->_raw_size; 5994 if (length < 24) 5995 { 5996 error_message = _("corrupt or empty %s section in %s"); 5997 goto fail; 5998 } 5999 6000 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0 6001 || (bfd_bread (buffer + offset, length, ibfd) != length)) 6002 { 6003 error_message = _("unable to read in %s section from %s"); 6004 goto fail; 6005 } 6006 6007 /* Process the contents of the section. */ 6008 ptr = buffer + offset; 6009 error_message = _("corrupt %s section in %s"); 6010 6011 /* Verify the contents of the header. Note - we have to 6012 extract the values this way in order to allow for a 6013 host whose endian-ness is different from the target. */ 6014 datum = bfd_get_32 (ibfd, ptr); 6015 if (datum != sizeof APUINFO_LABEL) 6016 goto fail; 6017 6018 datum = bfd_get_32 (ibfd, ptr + 8); 6019 if (datum != 0x2) 6020 goto fail; 6021 6022 if (strcmp (ptr + 12, APUINFO_LABEL) != 0) 6023 goto fail; 6024 6025 /* Get the number of bytes used for apuinfo entries. */ 6026 datum = bfd_get_32 (ibfd, ptr + 4); 6027 if (datum + 20 != length) 6028 goto fail; 6029 6030 /* Make sure that we do not run off the end of the section. */ 6031 if (offset + length > output_section_size) 6032 goto fail; 6033 6034 /* Scan the apuinfo section, building a list of apuinfo numbers. */ 6035 for (i = 0; i < datum; i += 4) 6036 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i)); 6037 6038 /* Update the offset. */ 6039 offset += length; 6040 } 6041 6042 error_message = NULL; 6043 6044 /* Compute the size of the output section. */ 6045 num_entries = apuinfo_list_length (); 6046 output_section_size = 20 + num_entries * 4; 6047 6048 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 6049 6050 if (! bfd_set_section_size (abfd, asec, output_section_size)) 6051 ibfd = abfd, 6052 error_message = _("warning: unable to set size of %s section in %s"); 6053 6054 fail: 6055 free (buffer); 6056 6057 if (error_message) 6058 (*_bfd_error_handler) (error_message, APUINFO_SECTION_NAME, 6059 bfd_archive_filename (ibfd)); 6060 } 6061 6062 6063 /* Prevent the output section from accumulating the input sections' 6064 contents. We have already stored this in our linked list structure. */ 6065 6066 static bfd_boolean 6067 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED, 6068 asection *asec, 6069 bfd_byte *contents ATTRIBUTE_UNUSED) 6070 { 6071 return (apuinfo_list_length () 6072 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0); 6073 } 6074 6075 6076 /* Finally we can generate the output section. */ 6077 6078 static void 6079 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) 6080 { 6081 bfd_byte *buffer; 6082 asection *asec; 6083 unsigned i; 6084 unsigned num_entries; 6085 bfd_size_type length; 6086 6087 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 6088 if (asec == NULL) 6089 return; 6090 6091 if (apuinfo_list_length () == 0) 6092 return; 6093 6094 length = asec->_raw_size; 6095 if (length < 20) 6096 return; 6097 6098 buffer = bfd_malloc (length); 6099 if (buffer == NULL) 6100 { 6101 (*_bfd_error_handler) 6102 (_("failed to allocate space for new APUinfo section.")); 6103 return; 6104 } 6105 6106 /* Create the apuinfo header. */ 6107 num_entries = apuinfo_list_length (); 6108 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer); 6109 bfd_put_32 (abfd, num_entries * 4, buffer + 4); 6110 bfd_put_32 (abfd, 0x2, buffer + 8); 6111 strcpy (buffer + 12, APUINFO_LABEL); 6112 6113 length = 20; 6114 for (i = 0; i < num_entries; i++) 6115 { 6116 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length); 6117 length += 4; 6118 } 6119 6120 if (length != asec->_raw_size) 6121 (*_bfd_error_handler) (_("failed to compute new APUinfo section.")); 6122 6123 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length)) 6124 (*_bfd_error_handler) (_("failed to install new APUinfo section.")); 6125 6126 free (buffer); 6127 6128 apuinfo_list_finish (); 6129 } 6130 6131 /* Add extra PPC sections -- Note, for now, make .sbss2 and 6132 .PPC.EMB.sbss0 a normal section, and not a bss section so 6133 that the linker doesn't crater when trying to make more than 6134 2 sections. */ 6135 6136 static struct bfd_elf_special_section const ppc_elf_special_sections[]= 6137 { 6138 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC }, 6139 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 6140 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 6141 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC }, 6142 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC }, 6143 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 }, 6144 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC }, 6145 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC }, 6146 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR }, 6147 { NULL, 0, 0, 0, 0 } 6148 }; 6149 6150 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec 6151 #define TARGET_LITTLE_NAME "elf32-powerpcle" 6152 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec 6153 #define TARGET_BIG_NAME "elf32-powerpc" 6154 #define ELF_ARCH bfd_arch_powerpc 6155 #define ELF_MACHINE_CODE EM_PPC 6156 #ifdef __QNXTARGET__ 6157 #define ELF_MAXPAGESIZE 0x1000 6158 #else 6159 #define ELF_MAXPAGESIZE 0x10000 6160 #endif 6161 #define elf_info_to_howto ppc_elf_info_to_howto 6162 6163 #ifdef EM_CYGNUS_POWERPC 6164 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC 6165 #endif 6166 6167 #ifdef EM_PPC_OLD 6168 #define ELF_MACHINE_ALT2 EM_PPC_OLD 6169 #endif 6170 6171 #define elf_backend_plt_not_loaded 1 6172 #define elf_backend_got_symbol_offset 4 6173 #define elf_backend_can_gc_sections 1 6174 #define elf_backend_can_refcount 1 6175 #define elf_backend_got_header_size 12 6176 #define elf_backend_rela_normal 1 6177 6178 #define bfd_elf32_mkobject ppc_elf_mkobject 6179 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data 6180 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section 6181 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup 6182 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags 6183 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create 6184 6185 #define elf_backend_object_p ppc_elf_object_p 6186 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook 6187 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook 6188 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr 6189 #define elf_backend_relocate_section ppc_elf_relocate_section 6190 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections 6191 #define elf_backend_check_relocs ppc_elf_check_relocs 6192 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol 6193 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol 6194 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook 6195 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections 6196 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol 6197 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections 6198 #define elf_backend_fake_sections ppc_elf_fake_sections 6199 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers 6200 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map 6201 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus 6202 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo 6203 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class 6204 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing 6205 #define elf_backend_final_write_processing ppc_elf_final_write_processing 6206 #define elf_backend_write_section ppc_elf_write_section 6207 #define elf_backend_special_sections ppc_elf_special_sections 6208 6209 #include "elf32-target.h" 6210