1 /* BFD back-end for HP PA-RISC ELF files. 2 Copyright (C) 1990-2016 Free Software Foundation, Inc. 3 4 Original code by 5 Center for Software Science 6 Department of Computer Science 7 University of Utah 8 Largely rewritten by Alan Modra <alan@linuxcare.com.au> 9 Naming cleanup by Carlos O'Donell <carlos@systemhalted.org> 10 TLS support written by Randolph Chung <tausq@debian.org> 11 12 This file is part of BFD, the Binary File Descriptor library. 13 14 This program is free software; you can redistribute it and/or modify 15 it under the terms of the GNU General Public License as published by 16 the Free Software Foundation; either version 3 of the License, or 17 (at your option) any later version. 18 19 This program is distributed in the hope that it will be useful, 20 but WITHOUT ANY WARRANTY; without even the implied warranty of 21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 GNU General Public License for more details. 23 24 You should have received a copy of the GNU General Public License 25 along with this program; if not, write to the Free Software 26 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 27 MA 02110-1301, USA. */ 28 29 #include "sysdep.h" 30 #include "bfd.h" 31 #include "libbfd.h" 32 #include "elf-bfd.h" 33 #include "elf/hppa.h" 34 #include "libhppa.h" 35 #include "elf32-hppa.h" 36 #define ARCH_SIZE 32 37 #include "elf32-hppa.h" 38 #include "elf-hppa.h" 39 40 /* In order to gain some understanding of code in this file without 41 knowing all the intricate details of the linker, note the 42 following: 43 44 Functions named elf32_hppa_* are called by external routines, other 45 functions are only called locally. elf32_hppa_* functions appear 46 in this file more or less in the order in which they are called 47 from external routines. eg. elf32_hppa_check_relocs is called 48 early in the link process, elf32_hppa_finish_dynamic_sections is 49 one of the last functions. */ 50 51 /* We use two hash tables to hold information for linking PA ELF objects. 52 53 The first is the elf32_hppa_link_hash_table which is derived 54 from the standard ELF linker hash table. We use this as a place to 55 attach other hash tables and static information. 56 57 The second is the stub hash table which is derived from the 58 base BFD hash table. The stub hash table holds the information 59 necessary to build the linker stubs during a link. 60 61 There are a number of different stubs generated by the linker. 62 63 Long branch stub: 64 : ldil LR'X,%r1 65 : be,n RR'X(%sr4,%r1) 66 67 PIC long branch stub: 68 : b,l .+8,%r1 69 : addil LR'X - ($PIC_pcrel$0 - 4),%r1 70 : be,n RR'X - ($PIC_pcrel$0 - 8)(%sr4,%r1) 71 72 Import stub to call shared library routine from normal object file 73 (single sub-space version) 74 : addil LR'lt_ptr+ltoff,%dp ; get procedure entry point 75 : ldw RR'lt_ptr+ltoff(%r1),%r21 76 : bv %r0(%r21) 77 : ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value. 78 79 Import stub to call shared library routine from shared library 80 (single sub-space version) 81 : addil LR'ltoff,%r19 ; get procedure entry point 82 : ldw RR'ltoff(%r1),%r21 83 : bv %r0(%r21) 84 : ldw RR'ltoff+4(%r1),%r19 ; get new dlt value. 85 86 Import stub to call shared library routine from normal object file 87 (multiple sub-space support) 88 : addil LR'lt_ptr+ltoff,%dp ; get procedure entry point 89 : ldw RR'lt_ptr+ltoff(%r1),%r21 90 : ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value. 91 : ldsid (%r21),%r1 92 : mtsp %r1,%sr0 93 : be 0(%sr0,%r21) ; branch to target 94 : stw %rp,-24(%sp) ; save rp 95 96 Import stub to call shared library routine from shared library 97 (multiple sub-space support) 98 : addil LR'ltoff,%r19 ; get procedure entry point 99 : ldw RR'ltoff(%r1),%r21 100 : ldw RR'ltoff+4(%r1),%r19 ; get new dlt value. 101 : ldsid (%r21),%r1 102 : mtsp %r1,%sr0 103 : be 0(%sr0,%r21) ; branch to target 104 : stw %rp,-24(%sp) ; save rp 105 106 Export stub to return from shared lib routine (multiple sub-space support) 107 One of these is created for each exported procedure in a shared 108 library (and stored in the shared lib). Shared lib routines are 109 called via the first instruction in the export stub so that we can 110 do an inter-space return. Not required for single sub-space. 111 : bl,n X,%rp ; trap the return 112 : nop 113 : ldw -24(%sp),%rp ; restore the original rp 114 : ldsid (%rp),%r1 115 : mtsp %r1,%sr0 116 : be,n 0(%sr0,%rp) ; inter-space return. */ 117 118 119 /* Variable names follow a coding style. 120 Please follow this (Apps Hungarian) style: 121 122 Structure/Variable Prefix 123 elf_link_hash_table "etab" 124 elf_link_hash_entry "eh" 125 126 elf32_hppa_link_hash_table "htab" 127 elf32_hppa_link_hash_entry "hh" 128 129 bfd_hash_table "btab" 130 bfd_hash_entry "bh" 131 132 bfd_hash_table containing stubs "bstab" 133 elf32_hppa_stub_hash_entry "hsh" 134 135 elf32_hppa_dyn_reloc_entry "hdh" 136 137 Always remember to use GNU Coding Style. */ 138 139 #define PLT_ENTRY_SIZE 8 140 #define GOT_ENTRY_SIZE 4 141 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" 142 143 static const bfd_byte plt_stub[] = 144 { 145 0x0e, 0x80, 0x10, 0x96, /* 1: ldw 0(%r20),%r22 */ 146 0xea, 0xc0, 0xc0, 0x00, /* bv %r0(%r22) */ 147 0x0e, 0x88, 0x10, 0x95, /* ldw 4(%r20),%r21 */ 148 #define PLT_STUB_ENTRY (3*4) 149 0xea, 0x9f, 0x1f, 0xdd, /* b,l 1b,%r20 */ 150 0xd6, 0x80, 0x1c, 0x1e, /* depi 0,31,2,%r20 */ 151 0x00, 0xc0, 0xff, 0xee, /* 9: .word fixup_func */ 152 0xde, 0xad, 0xbe, 0xef /* .word fixup_ltp */ 153 }; 154 155 /* Section name for stubs is the associated section name plus this 156 string. */ 157 #define STUB_SUFFIX ".stub" 158 159 /* We don't need to copy certain PC- or GP-relative dynamic relocs 160 into a shared object's dynamic section. All the relocs of the 161 limited class we are interested in, are absolute. */ 162 #ifndef RELATIVE_DYNRELOCS 163 #define RELATIVE_DYNRELOCS 0 164 #define IS_ABSOLUTE_RELOC(r_type) 1 165 #endif 166 167 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 168 copying dynamic variables from a shared lib into an app's dynbss 169 section, and instead use a dynamic relocation to point into the 170 shared lib. */ 171 #define ELIMINATE_COPY_RELOCS 1 172 173 enum elf32_hppa_stub_type 174 { 175 hppa_stub_long_branch, 176 hppa_stub_long_branch_shared, 177 hppa_stub_import, 178 hppa_stub_import_shared, 179 hppa_stub_export, 180 hppa_stub_none 181 }; 182 183 struct elf32_hppa_stub_hash_entry 184 { 185 /* Base hash table entry structure. */ 186 struct bfd_hash_entry bh_root; 187 188 /* The stub section. */ 189 asection *stub_sec; 190 191 /* Offset within stub_sec of the beginning of this stub. */ 192 bfd_vma stub_offset; 193 194 /* Given the symbol's value and its section we can determine its final 195 value when building the stubs (so the stub knows where to jump. */ 196 bfd_vma target_value; 197 asection *target_section; 198 199 enum elf32_hppa_stub_type stub_type; 200 201 /* The symbol table entry, if any, that this was derived from. */ 202 struct elf32_hppa_link_hash_entry *hh; 203 204 /* Where this stub is being called from, or, in the case of combined 205 stub sections, the first input section in the group. */ 206 asection *id_sec; 207 }; 208 209 struct elf32_hppa_link_hash_entry 210 { 211 struct elf_link_hash_entry eh; 212 213 /* A pointer to the most recently used stub hash entry against this 214 symbol. */ 215 struct elf32_hppa_stub_hash_entry *hsh_cache; 216 217 /* Used to count relocations for delayed sizing of relocation 218 sections. */ 219 struct elf32_hppa_dyn_reloc_entry 220 { 221 /* Next relocation in the chain. */ 222 struct elf32_hppa_dyn_reloc_entry *hdh_next; 223 224 /* The input section of the reloc. */ 225 asection *sec; 226 227 /* Number of relocs copied in this section. */ 228 bfd_size_type count; 229 230 #if RELATIVE_DYNRELOCS 231 /* Number of relative relocs copied for the input section. */ 232 bfd_size_type relative_count; 233 #endif 234 } *dyn_relocs; 235 236 enum 237 { 238 GOT_UNKNOWN = 0, GOT_NORMAL = 1, GOT_TLS_GD = 2, GOT_TLS_LDM = 4, GOT_TLS_IE = 8 239 } tls_type; 240 241 /* Set if this symbol is used by a plabel reloc. */ 242 unsigned int plabel:1; 243 }; 244 245 struct elf32_hppa_link_hash_table 246 { 247 /* The main hash table. */ 248 struct elf_link_hash_table etab; 249 250 /* The stub hash table. */ 251 struct bfd_hash_table bstab; 252 253 /* Linker stub bfd. */ 254 bfd *stub_bfd; 255 256 /* Linker call-backs. */ 257 asection * (*add_stub_section) (const char *, asection *); 258 void (*layout_sections_again) (void); 259 260 /* Array to keep track of which stub sections have been created, and 261 information on stub grouping. */ 262 struct map_stub 263 { 264 /* This is the section to which stubs in the group will be 265 attached. */ 266 asection *link_sec; 267 /* The stub section. */ 268 asection *stub_sec; 269 } *stub_group; 270 271 /* Assorted information used by elf32_hppa_size_stubs. */ 272 unsigned int bfd_count; 273 unsigned int top_index; 274 asection **input_list; 275 Elf_Internal_Sym **all_local_syms; 276 277 /* Short-cuts to get to dynamic linker sections. */ 278 asection *sgot; 279 asection *srelgot; 280 asection *splt; 281 asection *srelplt; 282 asection *sdynbss; 283 asection *srelbss; 284 285 /* Used during a final link to store the base of the text and data 286 segments so that we can perform SEGREL relocations. */ 287 bfd_vma text_segment_base; 288 bfd_vma data_segment_base; 289 290 /* Whether we support multiple sub-spaces for shared libs. */ 291 unsigned int multi_subspace:1; 292 293 /* Flags set when various size branches are detected. Used to 294 select suitable defaults for the stub group size. */ 295 unsigned int has_12bit_branch:1; 296 unsigned int has_17bit_branch:1; 297 unsigned int has_22bit_branch:1; 298 299 /* Set if we need a .plt stub to support lazy dynamic linking. */ 300 unsigned int need_plt_stub:1; 301 302 /* Small local sym cache. */ 303 struct sym_cache sym_cache; 304 305 /* Data for LDM relocations. */ 306 union 307 { 308 bfd_signed_vma refcount; 309 bfd_vma offset; 310 } tls_ldm_got; 311 }; 312 313 /* Various hash macros and functions. */ 314 #define hppa_link_hash_table(p) \ 315 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 316 == HPPA32_ELF_DATA ? ((struct elf32_hppa_link_hash_table *) ((p)->hash)) : NULL) 317 318 #define hppa_elf_hash_entry(ent) \ 319 ((struct elf32_hppa_link_hash_entry *)(ent)) 320 321 #define hppa_stub_hash_entry(ent) \ 322 ((struct elf32_hppa_stub_hash_entry *)(ent)) 323 324 #define hppa_stub_hash_lookup(table, string, create, copy) \ 325 ((struct elf32_hppa_stub_hash_entry *) \ 326 bfd_hash_lookup ((table), (string), (create), (copy))) 327 328 #define hppa_elf_local_got_tls_type(abfd) \ 329 ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info * 2))) 330 331 #define hh_name(hh) \ 332 (hh ? hh->eh.root.root.string : "<undef>") 333 334 #define eh_name(eh) \ 335 (eh ? eh->root.root.string : "<undef>") 336 337 /* Assorted hash table functions. */ 338 339 /* Initialize an entry in the stub hash table. */ 340 341 static struct bfd_hash_entry * 342 stub_hash_newfunc (struct bfd_hash_entry *entry, 343 struct bfd_hash_table *table, 344 const char *string) 345 { 346 /* Allocate the structure if it has not already been allocated by a 347 subclass. */ 348 if (entry == NULL) 349 { 350 entry = bfd_hash_allocate (table, 351 sizeof (struct elf32_hppa_stub_hash_entry)); 352 if (entry == NULL) 353 return entry; 354 } 355 356 /* Call the allocation method of the superclass. */ 357 entry = bfd_hash_newfunc (entry, table, string); 358 if (entry != NULL) 359 { 360 struct elf32_hppa_stub_hash_entry *hsh; 361 362 /* Initialize the local fields. */ 363 hsh = hppa_stub_hash_entry (entry); 364 hsh->stub_sec = NULL; 365 hsh->stub_offset = 0; 366 hsh->target_value = 0; 367 hsh->target_section = NULL; 368 hsh->stub_type = hppa_stub_long_branch; 369 hsh->hh = NULL; 370 hsh->id_sec = NULL; 371 } 372 373 return entry; 374 } 375 376 /* Initialize an entry in the link hash table. */ 377 378 static struct bfd_hash_entry * 379 hppa_link_hash_newfunc (struct bfd_hash_entry *entry, 380 struct bfd_hash_table *table, 381 const char *string) 382 { 383 /* Allocate the structure if it has not already been allocated by a 384 subclass. */ 385 if (entry == NULL) 386 { 387 entry = bfd_hash_allocate (table, 388 sizeof (struct elf32_hppa_link_hash_entry)); 389 if (entry == NULL) 390 return entry; 391 } 392 393 /* Call the allocation method of the superclass. */ 394 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 395 if (entry != NULL) 396 { 397 struct elf32_hppa_link_hash_entry *hh; 398 399 /* Initialize the local fields. */ 400 hh = hppa_elf_hash_entry (entry); 401 hh->hsh_cache = NULL; 402 hh->dyn_relocs = NULL; 403 hh->plabel = 0; 404 hh->tls_type = GOT_UNKNOWN; 405 } 406 407 return entry; 408 } 409 410 /* Free the derived linker hash table. */ 411 412 static void 413 elf32_hppa_link_hash_table_free (bfd *obfd) 414 { 415 struct elf32_hppa_link_hash_table *htab 416 = (struct elf32_hppa_link_hash_table *) obfd->link.hash; 417 418 bfd_hash_table_free (&htab->bstab); 419 _bfd_elf_link_hash_table_free (obfd); 420 } 421 422 /* Create the derived linker hash table. The PA ELF port uses the derived 423 hash table to keep information specific to the PA ELF linker (without 424 using static variables). */ 425 426 static struct bfd_link_hash_table * 427 elf32_hppa_link_hash_table_create (bfd *abfd) 428 { 429 struct elf32_hppa_link_hash_table *htab; 430 bfd_size_type amt = sizeof (*htab); 431 432 htab = bfd_zmalloc (amt); 433 if (htab == NULL) 434 return NULL; 435 436 if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd, hppa_link_hash_newfunc, 437 sizeof (struct elf32_hppa_link_hash_entry), 438 HPPA32_ELF_DATA)) 439 { 440 free (htab); 441 return NULL; 442 } 443 444 /* Init the stub hash table too. */ 445 if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc, 446 sizeof (struct elf32_hppa_stub_hash_entry))) 447 { 448 _bfd_elf_link_hash_table_free (abfd); 449 return NULL; 450 } 451 htab->etab.root.hash_table_free = elf32_hppa_link_hash_table_free; 452 453 htab->text_segment_base = (bfd_vma) -1; 454 htab->data_segment_base = (bfd_vma) -1; 455 return &htab->etab.root; 456 } 457 458 /* Initialize the linker stubs BFD so that we can use it for linker 459 created dynamic sections. */ 460 461 void 462 elf32_hppa_init_stub_bfd (bfd *abfd, struct bfd_link_info *info) 463 { 464 struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info); 465 466 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS32; 467 htab->etab.dynobj = abfd; 468 } 469 470 /* Build a name for an entry in the stub hash table. */ 471 472 static char * 473 hppa_stub_name (const asection *input_section, 474 const asection *sym_sec, 475 const struct elf32_hppa_link_hash_entry *hh, 476 const Elf_Internal_Rela *rela) 477 { 478 char *stub_name; 479 bfd_size_type len; 480 481 if (hh) 482 { 483 len = 8 + 1 + strlen (hh_name (hh)) + 1 + 8 + 1; 484 stub_name = bfd_malloc (len); 485 if (stub_name != NULL) 486 sprintf (stub_name, "%08x_%s+%x", 487 input_section->id & 0xffffffff, 488 hh_name (hh), 489 (int) rela->r_addend & 0xffffffff); 490 } 491 else 492 { 493 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; 494 stub_name = bfd_malloc (len); 495 if (stub_name != NULL) 496 sprintf (stub_name, "%08x_%x:%x+%x", 497 input_section->id & 0xffffffff, 498 sym_sec->id & 0xffffffff, 499 (int) ELF32_R_SYM (rela->r_info) & 0xffffffff, 500 (int) rela->r_addend & 0xffffffff); 501 } 502 return stub_name; 503 } 504 505 /* Look up an entry in the stub hash. Stub entries are cached because 506 creating the stub name takes a bit of time. */ 507 508 static struct elf32_hppa_stub_hash_entry * 509 hppa_get_stub_entry (const asection *input_section, 510 const asection *sym_sec, 511 struct elf32_hppa_link_hash_entry *hh, 512 const Elf_Internal_Rela *rela, 513 struct elf32_hppa_link_hash_table *htab) 514 { 515 struct elf32_hppa_stub_hash_entry *hsh_entry; 516 const asection *id_sec; 517 518 /* If this input section is part of a group of sections sharing one 519 stub section, then use the id of the first section in the group. 520 Stub names need to include a section id, as there may well be 521 more than one stub used to reach say, printf, and we need to 522 distinguish between them. */ 523 id_sec = htab->stub_group[input_section->id].link_sec; 524 525 if (hh != NULL && hh->hsh_cache != NULL 526 && hh->hsh_cache->hh == hh 527 && hh->hsh_cache->id_sec == id_sec) 528 { 529 hsh_entry = hh->hsh_cache; 530 } 531 else 532 { 533 char *stub_name; 534 535 stub_name = hppa_stub_name (id_sec, sym_sec, hh, rela); 536 if (stub_name == NULL) 537 return NULL; 538 539 hsh_entry = hppa_stub_hash_lookup (&htab->bstab, 540 stub_name, FALSE, FALSE); 541 if (hh != NULL) 542 hh->hsh_cache = hsh_entry; 543 544 free (stub_name); 545 } 546 547 return hsh_entry; 548 } 549 550 /* Add a new stub entry to the stub hash. Not all fields of the new 551 stub entry are initialised. */ 552 553 static struct elf32_hppa_stub_hash_entry * 554 hppa_add_stub (const char *stub_name, 555 asection *section, 556 struct elf32_hppa_link_hash_table *htab) 557 { 558 asection *link_sec; 559 asection *stub_sec; 560 struct elf32_hppa_stub_hash_entry *hsh; 561 562 link_sec = htab->stub_group[section->id].link_sec; 563 stub_sec = htab->stub_group[section->id].stub_sec; 564 if (stub_sec == NULL) 565 { 566 stub_sec = htab->stub_group[link_sec->id].stub_sec; 567 if (stub_sec == NULL) 568 { 569 size_t namelen; 570 bfd_size_type len; 571 char *s_name; 572 573 namelen = strlen (link_sec->name); 574 len = namelen + sizeof (STUB_SUFFIX); 575 s_name = bfd_alloc (htab->stub_bfd, len); 576 if (s_name == NULL) 577 return NULL; 578 579 memcpy (s_name, link_sec->name, namelen); 580 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); 581 stub_sec = (*htab->add_stub_section) (s_name, link_sec); 582 if (stub_sec == NULL) 583 return NULL; 584 htab->stub_group[link_sec->id].stub_sec = stub_sec; 585 } 586 htab->stub_group[section->id].stub_sec = stub_sec; 587 } 588 589 /* Enter this entry into the linker stub hash table. */ 590 hsh = hppa_stub_hash_lookup (&htab->bstab, stub_name, 591 TRUE, FALSE); 592 if (hsh == NULL) 593 { 594 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"), 595 section->owner, 596 stub_name); 597 return NULL; 598 } 599 600 hsh->stub_sec = stub_sec; 601 hsh->stub_offset = 0; 602 hsh->id_sec = link_sec; 603 return hsh; 604 } 605 606 /* Determine the type of stub needed, if any, for a call. */ 607 608 static enum elf32_hppa_stub_type 609 hppa_type_of_stub (asection *input_sec, 610 const Elf_Internal_Rela *rela, 611 struct elf32_hppa_link_hash_entry *hh, 612 bfd_vma destination, 613 struct bfd_link_info *info) 614 { 615 bfd_vma location; 616 bfd_vma branch_offset; 617 bfd_vma max_branch_offset; 618 unsigned int r_type; 619 620 if (hh != NULL 621 && hh->eh.plt.offset != (bfd_vma) -1 622 && hh->eh.dynindx != -1 623 && !hh->plabel 624 && (bfd_link_pic (info) 625 || !hh->eh.def_regular 626 || hh->eh.root.type == bfd_link_hash_defweak)) 627 { 628 /* We need an import stub. Decide between hppa_stub_import 629 and hppa_stub_import_shared later. */ 630 return hppa_stub_import; 631 } 632 633 /* Determine where the call point is. */ 634 location = (input_sec->output_offset 635 + input_sec->output_section->vma 636 + rela->r_offset); 637 638 branch_offset = destination - location - 8; 639 r_type = ELF32_R_TYPE (rela->r_info); 640 641 /* Determine if a long branch stub is needed. parisc branch offsets 642 are relative to the second instruction past the branch, ie. +8 643 bytes on from the branch instruction location. The offset is 644 signed and counts in units of 4 bytes. */ 645 if (r_type == (unsigned int) R_PARISC_PCREL17F) 646 max_branch_offset = (1 << (17 - 1)) << 2; 647 648 else if (r_type == (unsigned int) R_PARISC_PCREL12F) 649 max_branch_offset = (1 << (12 - 1)) << 2; 650 651 else /* R_PARISC_PCREL22F. */ 652 max_branch_offset = (1 << (22 - 1)) << 2; 653 654 if (branch_offset + max_branch_offset >= 2*max_branch_offset) 655 return hppa_stub_long_branch; 656 657 return hppa_stub_none; 658 } 659 660 /* Build one linker stub as defined by the stub hash table entry GEN_ENTRY. 661 IN_ARG contains the link info pointer. */ 662 663 #define LDIL_R1 0x20200000 /* ldil LR'XXX,%r1 */ 664 #define BE_SR4_R1 0xe0202002 /* be,n RR'XXX(%sr4,%r1) */ 665 666 #define BL_R1 0xe8200000 /* b,l .+8,%r1 */ 667 #define ADDIL_R1 0x28200000 /* addil LR'XXX,%r1,%r1 */ 668 #define DEPI_R1 0xd4201c1e /* depi 0,31,2,%r1 */ 669 670 #define ADDIL_DP 0x2b600000 /* addil LR'XXX,%dp,%r1 */ 671 #define LDW_R1_R21 0x48350000 /* ldw RR'XXX(%sr0,%r1),%r21 */ 672 #define BV_R0_R21 0xeaa0c000 /* bv %r0(%r21) */ 673 #define LDW_R1_R19 0x48330000 /* ldw RR'XXX(%sr0,%r1),%r19 */ 674 675 #define ADDIL_R19 0x2a600000 /* addil LR'XXX,%r19,%r1 */ 676 #define LDW_R1_DP 0x483b0000 /* ldw RR'XXX(%sr0,%r1),%dp */ 677 678 #define LDSID_R21_R1 0x02a010a1 /* ldsid (%sr0,%r21),%r1 */ 679 #define MTSP_R1 0x00011820 /* mtsp %r1,%sr0 */ 680 #define BE_SR0_R21 0xe2a00000 /* be 0(%sr0,%r21) */ 681 #define STW_RP 0x6bc23fd1 /* stw %rp,-24(%sr0,%sp) */ 682 683 #define BL22_RP 0xe800a002 /* b,l,n XXX,%rp */ 684 #define BL_RP 0xe8400002 /* b,l,n XXX,%rp */ 685 #define NOP 0x08000240 /* nop */ 686 #define LDW_RP 0x4bc23fd1 /* ldw -24(%sr0,%sp),%rp */ 687 #define LDSID_RP_R1 0x004010a1 /* ldsid (%sr0,%rp),%r1 */ 688 #define BE_SR0_RP 0xe0400002 /* be,n 0(%sr0,%rp) */ 689 690 #ifndef R19_STUBS 691 #define R19_STUBS 1 692 #endif 693 694 #if R19_STUBS 695 #define LDW_R1_DLT LDW_R1_R19 696 #else 697 #define LDW_R1_DLT LDW_R1_DP 698 #endif 699 700 static bfd_boolean 701 hppa_build_one_stub (struct bfd_hash_entry *bh, void *in_arg) 702 { 703 struct elf32_hppa_stub_hash_entry *hsh; 704 struct bfd_link_info *info; 705 struct elf32_hppa_link_hash_table *htab; 706 asection *stub_sec; 707 bfd *stub_bfd; 708 bfd_byte *loc; 709 bfd_vma sym_value; 710 bfd_vma insn; 711 bfd_vma off; 712 int val; 713 int size; 714 715 /* Massage our args to the form they really have. */ 716 hsh = hppa_stub_hash_entry (bh); 717 info = (struct bfd_link_info *)in_arg; 718 719 htab = hppa_link_hash_table (info); 720 if (htab == NULL) 721 return FALSE; 722 723 stub_sec = hsh->stub_sec; 724 725 /* Make a note of the offset within the stubs for this entry. */ 726 hsh->stub_offset = stub_sec->size; 727 loc = stub_sec->contents + hsh->stub_offset; 728 729 stub_bfd = stub_sec->owner; 730 731 switch (hsh->stub_type) 732 { 733 case hppa_stub_long_branch: 734 /* Create the long branch. A long branch is formed with "ldil" 735 loading the upper bits of the target address into a register, 736 then branching with "be" which adds in the lower bits. 737 The "be" has its delay slot nullified. */ 738 sym_value = (hsh->target_value 739 + hsh->target_section->output_offset 740 + hsh->target_section->output_section->vma); 741 742 val = hppa_field_adjust (sym_value, 0, e_lrsel); 743 insn = hppa_rebuild_insn ((int) LDIL_R1, val, 21); 744 bfd_put_32 (stub_bfd, insn, loc); 745 746 val = hppa_field_adjust (sym_value, 0, e_rrsel) >> 2; 747 insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17); 748 bfd_put_32 (stub_bfd, insn, loc + 4); 749 750 size = 8; 751 break; 752 753 case hppa_stub_long_branch_shared: 754 /* Branches are relative. This is where we are going to. */ 755 sym_value = (hsh->target_value 756 + hsh->target_section->output_offset 757 + hsh->target_section->output_section->vma); 758 759 /* And this is where we are coming from, more or less. */ 760 sym_value -= (hsh->stub_offset 761 + stub_sec->output_offset 762 + stub_sec->output_section->vma); 763 764 bfd_put_32 (stub_bfd, (bfd_vma) BL_R1, loc); 765 val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_lrsel); 766 insn = hppa_rebuild_insn ((int) ADDIL_R1, val, 21); 767 bfd_put_32 (stub_bfd, insn, loc + 4); 768 769 val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_rrsel) >> 2; 770 insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17); 771 bfd_put_32 (stub_bfd, insn, loc + 8); 772 size = 12; 773 break; 774 775 case hppa_stub_import: 776 case hppa_stub_import_shared: 777 off = hsh->hh->eh.plt.offset; 778 if (off >= (bfd_vma) -2) 779 abort (); 780 781 off &= ~ (bfd_vma) 1; 782 sym_value = (off 783 + htab->splt->output_offset 784 + htab->splt->output_section->vma 785 - elf_gp (htab->splt->output_section->owner)); 786 787 insn = ADDIL_DP; 788 #if R19_STUBS 789 if (hsh->stub_type == hppa_stub_import_shared) 790 insn = ADDIL_R19; 791 #endif 792 val = hppa_field_adjust (sym_value, 0, e_lrsel), 793 insn = hppa_rebuild_insn ((int) insn, val, 21); 794 bfd_put_32 (stub_bfd, insn, loc); 795 796 /* It is critical to use lrsel/rrsel here because we are using 797 two different offsets (+0 and +4) from sym_value. If we use 798 lsel/rsel then with unfortunate sym_values we will round 799 sym_value+4 up to the next 2k block leading to a mis-match 800 between the lsel and rsel value. */ 801 val = hppa_field_adjust (sym_value, 0, e_rrsel); 802 insn = hppa_rebuild_insn ((int) LDW_R1_R21, val, 14); 803 bfd_put_32 (stub_bfd, insn, loc + 4); 804 805 if (htab->multi_subspace) 806 { 807 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel); 808 insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14); 809 bfd_put_32 (stub_bfd, insn, loc + 8); 810 811 bfd_put_32 (stub_bfd, (bfd_vma) LDSID_R21_R1, loc + 12); 812 bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16); 813 bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_R21, loc + 20); 814 bfd_put_32 (stub_bfd, (bfd_vma) STW_RP, loc + 24); 815 816 size = 28; 817 } 818 else 819 { 820 bfd_put_32 (stub_bfd, (bfd_vma) BV_R0_R21, loc + 8); 821 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel); 822 insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14); 823 bfd_put_32 (stub_bfd, insn, loc + 12); 824 825 size = 16; 826 } 827 828 break; 829 830 case hppa_stub_export: 831 /* Branches are relative. This is where we are going to. */ 832 sym_value = (hsh->target_value 833 + hsh->target_section->output_offset 834 + hsh->target_section->output_section->vma); 835 836 /* And this is where we are coming from. */ 837 sym_value -= (hsh->stub_offset 838 + stub_sec->output_offset 839 + stub_sec->output_section->vma); 840 841 if (sym_value - 8 + (1 << (17 + 1)) >= (1 << (17 + 2)) 842 && (!htab->has_22bit_branch 843 || sym_value - 8 + (1 << (22 + 1)) >= (1 << (22 + 2)))) 844 { 845 (*_bfd_error_handler) 846 (_("%B(%A+0x%lx): cannot reach %s, recompile with -ffunction-sections"), 847 hsh->target_section->owner, 848 stub_sec, 849 (long) hsh->stub_offset, 850 hsh->bh_root.string); 851 bfd_set_error (bfd_error_bad_value); 852 return FALSE; 853 } 854 855 val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_fsel) >> 2; 856 if (!htab->has_22bit_branch) 857 insn = hppa_rebuild_insn ((int) BL_RP, val, 17); 858 else 859 insn = hppa_rebuild_insn ((int) BL22_RP, val, 22); 860 bfd_put_32 (stub_bfd, insn, loc); 861 862 bfd_put_32 (stub_bfd, (bfd_vma) NOP, loc + 4); 863 bfd_put_32 (stub_bfd, (bfd_vma) LDW_RP, loc + 8); 864 bfd_put_32 (stub_bfd, (bfd_vma) LDSID_RP_R1, loc + 12); 865 bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16); 866 bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_RP, loc + 20); 867 868 /* Point the function symbol at the stub. */ 869 hsh->hh->eh.root.u.def.section = stub_sec; 870 hsh->hh->eh.root.u.def.value = stub_sec->size; 871 872 size = 24; 873 break; 874 875 default: 876 BFD_FAIL (); 877 return FALSE; 878 } 879 880 stub_sec->size += size; 881 return TRUE; 882 } 883 884 #undef LDIL_R1 885 #undef BE_SR4_R1 886 #undef BL_R1 887 #undef ADDIL_R1 888 #undef DEPI_R1 889 #undef LDW_R1_R21 890 #undef LDW_R1_DLT 891 #undef LDW_R1_R19 892 #undef ADDIL_R19 893 #undef LDW_R1_DP 894 #undef LDSID_R21_R1 895 #undef MTSP_R1 896 #undef BE_SR0_R21 897 #undef STW_RP 898 #undef BV_R0_R21 899 #undef BL_RP 900 #undef NOP 901 #undef LDW_RP 902 #undef LDSID_RP_R1 903 #undef BE_SR0_RP 904 905 /* As above, but don't actually build the stub. Just bump offset so 906 we know stub section sizes. */ 907 908 static bfd_boolean 909 hppa_size_one_stub (struct bfd_hash_entry *bh, void *in_arg) 910 { 911 struct elf32_hppa_stub_hash_entry *hsh; 912 struct elf32_hppa_link_hash_table *htab; 913 int size; 914 915 /* Massage our args to the form they really have. */ 916 hsh = hppa_stub_hash_entry (bh); 917 htab = in_arg; 918 919 if (hsh->stub_type == hppa_stub_long_branch) 920 size = 8; 921 else if (hsh->stub_type == hppa_stub_long_branch_shared) 922 size = 12; 923 else if (hsh->stub_type == hppa_stub_export) 924 size = 24; 925 else /* hppa_stub_import or hppa_stub_import_shared. */ 926 { 927 if (htab->multi_subspace) 928 size = 28; 929 else 930 size = 16; 931 } 932 933 hsh->stub_sec->size += size; 934 return TRUE; 935 } 936 937 /* Return nonzero if ABFD represents an HPPA ELF32 file. 938 Additionally we set the default architecture and machine. */ 939 940 static bfd_boolean 941 elf32_hppa_object_p (bfd *abfd) 942 { 943 Elf_Internal_Ehdr * i_ehdrp; 944 unsigned int flags; 945 946 i_ehdrp = elf_elfheader (abfd); 947 if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0) 948 { 949 /* GCC on hppa-linux produces binaries with OSABI=GNU, 950 but the kernel produces corefiles with OSABI=SysV. */ 951 if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_GNU && 952 i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_NONE) /* aka SYSV */ 953 return FALSE; 954 } 955 else if (strcmp (bfd_get_target (abfd), "elf32-hppa-netbsd") == 0) 956 { 957 /* GCC on hppa-netbsd produces binaries with OSABI=NetBSD, 958 but the kernel produces corefiles with OSABI=SysV. */ 959 if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_NETBSD && 960 i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_NONE) /* aka SYSV */ 961 return FALSE; 962 } 963 else 964 { 965 if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_HPUX) 966 return FALSE; 967 } 968 969 flags = i_ehdrp->e_flags; 970 switch (flags & (EF_PARISC_ARCH | EF_PARISC_WIDE)) 971 { 972 case EFA_PARISC_1_0: 973 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 10); 974 case EFA_PARISC_1_1: 975 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 11); 976 case EFA_PARISC_2_0: 977 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 20); 978 case EFA_PARISC_2_0 | EF_PARISC_WIDE: 979 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 25); 980 } 981 return TRUE; 982 } 983 984 /* Create the .plt and .got sections, and set up our hash table 985 short-cuts to various dynamic sections. */ 986 987 static bfd_boolean 988 elf32_hppa_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 989 { 990 struct elf32_hppa_link_hash_table *htab; 991 struct elf_link_hash_entry *eh; 992 993 /* Don't try to create the .plt and .got twice. */ 994 htab = hppa_link_hash_table (info); 995 if (htab == NULL) 996 return FALSE; 997 if (htab->splt != NULL) 998 return TRUE; 999 1000 /* Call the generic code to do most of the work. */ 1001 if (! _bfd_elf_create_dynamic_sections (abfd, info)) 1002 return FALSE; 1003 1004 htab->splt = bfd_get_linker_section (abfd, ".plt"); 1005 htab->srelplt = bfd_get_linker_section (abfd, ".rela.plt"); 1006 1007 htab->sgot = bfd_get_linker_section (abfd, ".got"); 1008 htab->srelgot = bfd_get_linker_section (abfd, ".rela.got"); 1009 1010 htab->sdynbss = bfd_get_linker_section (abfd, ".dynbss"); 1011 htab->srelbss = bfd_get_linker_section (abfd, ".rela.bss"); 1012 1013 /* hppa-linux needs _GLOBAL_OFFSET_TABLE_ to be visible from the main 1014 application, because __canonicalize_funcptr_for_compare needs it. */ 1015 eh = elf_hash_table (info)->hgot; 1016 eh->forced_local = 0; 1017 eh->other = STV_DEFAULT; 1018 return bfd_elf_link_record_dynamic_symbol (info, eh); 1019 } 1020 1021 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 1022 1023 static void 1024 elf32_hppa_copy_indirect_symbol (struct bfd_link_info *info, 1025 struct elf_link_hash_entry *eh_dir, 1026 struct elf_link_hash_entry *eh_ind) 1027 { 1028 struct elf32_hppa_link_hash_entry *hh_dir, *hh_ind; 1029 1030 hh_dir = hppa_elf_hash_entry (eh_dir); 1031 hh_ind = hppa_elf_hash_entry (eh_ind); 1032 1033 if (hh_ind->dyn_relocs != NULL) 1034 { 1035 if (hh_dir->dyn_relocs != NULL) 1036 { 1037 struct elf32_hppa_dyn_reloc_entry **hdh_pp; 1038 struct elf32_hppa_dyn_reloc_entry *hdh_p; 1039 1040 /* Add reloc counts against the indirect sym to the direct sym 1041 list. Merge any entries against the same section. */ 1042 for (hdh_pp = &hh_ind->dyn_relocs; (hdh_p = *hdh_pp) != NULL; ) 1043 { 1044 struct elf32_hppa_dyn_reloc_entry *hdh_q; 1045 1046 for (hdh_q = hh_dir->dyn_relocs; 1047 hdh_q != NULL; 1048 hdh_q = hdh_q->hdh_next) 1049 if (hdh_q->sec == hdh_p->sec) 1050 { 1051 #if RELATIVE_DYNRELOCS 1052 hdh_q->relative_count += hdh_p->relative_count; 1053 #endif 1054 hdh_q->count += hdh_p->count; 1055 *hdh_pp = hdh_p->hdh_next; 1056 break; 1057 } 1058 if (hdh_q == NULL) 1059 hdh_pp = &hdh_p->hdh_next; 1060 } 1061 *hdh_pp = hh_dir->dyn_relocs; 1062 } 1063 1064 hh_dir->dyn_relocs = hh_ind->dyn_relocs; 1065 hh_ind->dyn_relocs = NULL; 1066 } 1067 1068 if (ELIMINATE_COPY_RELOCS 1069 && eh_ind->root.type != bfd_link_hash_indirect 1070 && eh_dir->dynamic_adjusted) 1071 { 1072 /* If called to transfer flags for a weakdef during processing 1073 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 1074 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 1075 eh_dir->ref_dynamic |= eh_ind->ref_dynamic; 1076 eh_dir->ref_regular |= eh_ind->ref_regular; 1077 eh_dir->ref_regular_nonweak |= eh_ind->ref_regular_nonweak; 1078 eh_dir->needs_plt |= eh_ind->needs_plt; 1079 } 1080 else 1081 { 1082 if (eh_ind->root.type == bfd_link_hash_indirect 1083 && eh_dir->got.refcount <= 0) 1084 { 1085 hh_dir->tls_type = hh_ind->tls_type; 1086 hh_ind->tls_type = GOT_UNKNOWN; 1087 } 1088 1089 _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind); 1090 } 1091 } 1092 1093 static int 1094 elf32_hppa_optimized_tls_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, 1095 int r_type, int is_local ATTRIBUTE_UNUSED) 1096 { 1097 /* For now we don't support linker optimizations. */ 1098 return r_type; 1099 } 1100 1101 /* Return a pointer to the local GOT, PLT and TLS reference counts 1102 for ABFD. Returns NULL if the storage allocation fails. */ 1103 1104 static bfd_signed_vma * 1105 hppa32_elf_local_refcounts (bfd *abfd) 1106 { 1107 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1108 bfd_signed_vma *local_refcounts; 1109 1110 local_refcounts = elf_local_got_refcounts (abfd); 1111 if (local_refcounts == NULL) 1112 { 1113 bfd_size_type size; 1114 1115 /* Allocate space for local GOT and PLT reference 1116 counts. Done this way to save polluting elf_obj_tdata 1117 with another target specific pointer. */ 1118 size = symtab_hdr->sh_info; 1119 size *= 2 * sizeof (bfd_signed_vma); 1120 /* Add in space to store the local GOT TLS types. */ 1121 size += symtab_hdr->sh_info; 1122 local_refcounts = bfd_zalloc (abfd, size); 1123 if (local_refcounts == NULL) 1124 return NULL; 1125 elf_local_got_refcounts (abfd) = local_refcounts; 1126 memset (hppa_elf_local_got_tls_type (abfd), GOT_UNKNOWN, 1127 symtab_hdr->sh_info); 1128 } 1129 return local_refcounts; 1130 } 1131 1132 1133 /* Look through the relocs for a section during the first phase, and 1134 calculate needed space in the global offset table, procedure linkage 1135 table, and dynamic reloc sections. At this point we haven't 1136 necessarily read all the input files. */ 1137 1138 static bfd_boolean 1139 elf32_hppa_check_relocs (bfd *abfd, 1140 struct bfd_link_info *info, 1141 asection *sec, 1142 const Elf_Internal_Rela *relocs) 1143 { 1144 Elf_Internal_Shdr *symtab_hdr; 1145 struct elf_link_hash_entry **eh_syms; 1146 const Elf_Internal_Rela *rela; 1147 const Elf_Internal_Rela *rela_end; 1148 struct elf32_hppa_link_hash_table *htab; 1149 asection *sreloc; 1150 int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN; 1151 1152 if (bfd_link_relocatable (info)) 1153 return TRUE; 1154 1155 htab = hppa_link_hash_table (info); 1156 if (htab == NULL) 1157 return FALSE; 1158 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1159 eh_syms = elf_sym_hashes (abfd); 1160 sreloc = NULL; 1161 1162 rela_end = relocs + sec->reloc_count; 1163 for (rela = relocs; rela < rela_end; rela++) 1164 { 1165 enum { 1166 NEED_GOT = 1, 1167 NEED_PLT = 2, 1168 NEED_DYNREL = 4, 1169 PLT_PLABEL = 8 1170 }; 1171 1172 unsigned int r_symndx, r_type; 1173 struct elf32_hppa_link_hash_entry *hh; 1174 int need_entry = 0; 1175 1176 r_symndx = ELF32_R_SYM (rela->r_info); 1177 1178 if (r_symndx < symtab_hdr->sh_info) 1179 hh = NULL; 1180 else 1181 { 1182 hh = hppa_elf_hash_entry (eh_syms[r_symndx - symtab_hdr->sh_info]); 1183 while (hh->eh.root.type == bfd_link_hash_indirect 1184 || hh->eh.root.type == bfd_link_hash_warning) 1185 hh = hppa_elf_hash_entry (hh->eh.root.u.i.link); 1186 1187 /* PR15323, ref flags aren't set for references in the same 1188 object. */ 1189 hh->eh.root.non_ir_ref = 1; 1190 } 1191 1192 r_type = ELF32_R_TYPE (rela->r_info); 1193 r_type = elf32_hppa_optimized_tls_reloc (info, r_type, hh == NULL); 1194 1195 switch (r_type) 1196 { 1197 case R_PARISC_DLTIND14F: 1198 case R_PARISC_DLTIND14R: 1199 case R_PARISC_DLTIND21L: 1200 /* This symbol requires a global offset table entry. */ 1201 need_entry = NEED_GOT; 1202 break; 1203 1204 case R_PARISC_PLABEL14R: /* "Official" procedure labels. */ 1205 case R_PARISC_PLABEL21L: 1206 case R_PARISC_PLABEL32: 1207 /* If the addend is non-zero, we break badly. */ 1208 if (rela->r_addend != 0) 1209 abort (); 1210 1211 /* If we are creating a shared library, then we need to 1212 create a PLT entry for all PLABELs, because PLABELs with 1213 local symbols may be passed via a pointer to another 1214 object. Additionally, output a dynamic relocation 1215 pointing to the PLT entry. 1216 1217 For executables, the original 32-bit ABI allowed two 1218 different styles of PLABELs (function pointers): For 1219 global functions, the PLABEL word points into the .plt 1220 two bytes past a (function address, gp) pair, and for 1221 local functions the PLABEL points directly at the 1222 function. The magic +2 for the first type allows us to 1223 differentiate between the two. As you can imagine, this 1224 is a real pain when it comes to generating code to call 1225 functions indirectly or to compare function pointers. 1226 We avoid the mess by always pointing a PLABEL into the 1227 .plt, even for local functions. */ 1228 need_entry = PLT_PLABEL | NEED_PLT | NEED_DYNREL; 1229 break; 1230 1231 case R_PARISC_PCREL12F: 1232 htab->has_12bit_branch = 1; 1233 goto branch_common; 1234 1235 case R_PARISC_PCREL17C: 1236 case R_PARISC_PCREL17F: 1237 htab->has_17bit_branch = 1; 1238 goto branch_common; 1239 1240 case R_PARISC_PCREL22F: 1241 htab->has_22bit_branch = 1; 1242 branch_common: 1243 /* Function calls might need to go through the .plt, and 1244 might require long branch stubs. */ 1245 if (hh == NULL) 1246 { 1247 /* We know local syms won't need a .plt entry, and if 1248 they need a long branch stub we can't guarantee that 1249 we can reach the stub. So just flag an error later 1250 if we're doing a shared link and find we need a long 1251 branch stub. */ 1252 continue; 1253 } 1254 else 1255 { 1256 /* Global symbols will need a .plt entry if they remain 1257 global, and in most cases won't need a long branch 1258 stub. Unfortunately, we have to cater for the case 1259 where a symbol is forced local by versioning, or due 1260 to symbolic linking, and we lose the .plt entry. */ 1261 need_entry = NEED_PLT; 1262 if (hh->eh.type == STT_PARISC_MILLI) 1263 need_entry = 0; 1264 } 1265 break; 1266 1267 case R_PARISC_SEGBASE: /* Used to set segment base. */ 1268 case R_PARISC_SEGREL32: /* Relative reloc, used for unwind. */ 1269 case R_PARISC_PCREL14F: /* PC relative load/store. */ 1270 case R_PARISC_PCREL14R: 1271 case R_PARISC_PCREL17R: /* External branches. */ 1272 case R_PARISC_PCREL21L: /* As above, and for load/store too. */ 1273 case R_PARISC_PCREL32: 1274 /* We don't need to propagate the relocation if linking a 1275 shared object since these are section relative. */ 1276 continue; 1277 1278 case R_PARISC_DPREL14F: /* Used for gp rel data load/store. */ 1279 case R_PARISC_DPREL14R: 1280 case R_PARISC_DPREL21L: 1281 if (bfd_link_pic (info)) 1282 { 1283 (*_bfd_error_handler) 1284 (_("%B: relocation %s can not be used when making a shared object; recompile with -fPIC"), 1285 abfd, 1286 elf_hppa_howto_table[r_type].name); 1287 bfd_set_error (bfd_error_bad_value); 1288 return FALSE; 1289 } 1290 /* Fall through. */ 1291 1292 case R_PARISC_DIR17F: /* Used for external branches. */ 1293 case R_PARISC_DIR17R: 1294 case R_PARISC_DIR14F: /* Used for load/store from absolute locn. */ 1295 case R_PARISC_DIR14R: 1296 case R_PARISC_DIR21L: /* As above, and for ext branches too. */ 1297 case R_PARISC_DIR32: /* .word relocs. */ 1298 /* We may want to output a dynamic relocation later. */ 1299 need_entry = NEED_DYNREL; 1300 break; 1301 1302 /* This relocation describes the C++ object vtable hierarchy. 1303 Reconstruct it for later use during GC. */ 1304 case R_PARISC_GNU_VTINHERIT: 1305 if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh, rela->r_offset)) 1306 return FALSE; 1307 continue; 1308 1309 /* This relocation describes which C++ vtable entries are actually 1310 used. Record for later use during GC. */ 1311 case R_PARISC_GNU_VTENTRY: 1312 BFD_ASSERT (hh != NULL); 1313 if (hh != NULL 1314 && !bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rela->r_addend)) 1315 return FALSE; 1316 continue; 1317 1318 case R_PARISC_TLS_GD21L: 1319 case R_PARISC_TLS_GD14R: 1320 case R_PARISC_TLS_LDM21L: 1321 case R_PARISC_TLS_LDM14R: 1322 need_entry = NEED_GOT; 1323 break; 1324 1325 case R_PARISC_TLS_IE21L: 1326 case R_PARISC_TLS_IE14R: 1327 if (bfd_link_pic (info)) 1328 info->flags |= DF_STATIC_TLS; 1329 need_entry = NEED_GOT; 1330 break; 1331 1332 default: 1333 continue; 1334 } 1335 1336 /* Now carry out our orders. */ 1337 if (need_entry & NEED_GOT) 1338 { 1339 switch (r_type) 1340 { 1341 default: 1342 tls_type = GOT_NORMAL; 1343 break; 1344 case R_PARISC_TLS_GD21L: 1345 case R_PARISC_TLS_GD14R: 1346 tls_type |= GOT_TLS_GD; 1347 break; 1348 case R_PARISC_TLS_LDM21L: 1349 case R_PARISC_TLS_LDM14R: 1350 tls_type |= GOT_TLS_LDM; 1351 break; 1352 case R_PARISC_TLS_IE21L: 1353 case R_PARISC_TLS_IE14R: 1354 tls_type |= GOT_TLS_IE; 1355 break; 1356 } 1357 1358 /* Allocate space for a GOT entry, as well as a dynamic 1359 relocation for this entry. */ 1360 if (htab->sgot == NULL) 1361 { 1362 if (!elf32_hppa_create_dynamic_sections (htab->etab.dynobj, info)) 1363 return FALSE; 1364 } 1365 1366 if (r_type == R_PARISC_TLS_LDM21L 1367 || r_type == R_PARISC_TLS_LDM14R) 1368 htab->tls_ldm_got.refcount += 1; 1369 else 1370 { 1371 if (hh != NULL) 1372 { 1373 hh->eh.got.refcount += 1; 1374 old_tls_type = hh->tls_type; 1375 } 1376 else 1377 { 1378 bfd_signed_vma *local_got_refcounts; 1379 1380 /* This is a global offset table entry for a local symbol. */ 1381 local_got_refcounts = hppa32_elf_local_refcounts (abfd); 1382 if (local_got_refcounts == NULL) 1383 return FALSE; 1384 local_got_refcounts[r_symndx] += 1; 1385 1386 old_tls_type = hppa_elf_local_got_tls_type (abfd) [r_symndx]; 1387 } 1388 1389 tls_type |= old_tls_type; 1390 1391 if (old_tls_type != tls_type) 1392 { 1393 if (hh != NULL) 1394 hh->tls_type = tls_type; 1395 else 1396 hppa_elf_local_got_tls_type (abfd) [r_symndx] = tls_type; 1397 } 1398 1399 } 1400 } 1401 1402 if (need_entry & NEED_PLT) 1403 { 1404 /* If we are creating a shared library, and this is a reloc 1405 against a weak symbol or a global symbol in a dynamic 1406 object, then we will be creating an import stub and a 1407 .plt entry for the symbol. Similarly, on a normal link 1408 to symbols defined in a dynamic object we'll need the 1409 import stub and a .plt entry. We don't know yet whether 1410 the symbol is defined or not, so make an entry anyway and 1411 clean up later in adjust_dynamic_symbol. */ 1412 if ((sec->flags & SEC_ALLOC) != 0) 1413 { 1414 if (hh != NULL) 1415 { 1416 hh->eh.needs_plt = 1; 1417 hh->eh.plt.refcount += 1; 1418 1419 /* If this .plt entry is for a plabel, mark it so 1420 that adjust_dynamic_symbol will keep the entry 1421 even if it appears to be local. */ 1422 if (need_entry & PLT_PLABEL) 1423 hh->plabel = 1; 1424 } 1425 else if (need_entry & PLT_PLABEL) 1426 { 1427 bfd_signed_vma *local_got_refcounts; 1428 bfd_signed_vma *local_plt_refcounts; 1429 1430 local_got_refcounts = hppa32_elf_local_refcounts (abfd); 1431 if (local_got_refcounts == NULL) 1432 return FALSE; 1433 local_plt_refcounts = (local_got_refcounts 1434 + symtab_hdr->sh_info); 1435 local_plt_refcounts[r_symndx] += 1; 1436 } 1437 } 1438 } 1439 1440 if (need_entry & NEED_DYNREL) 1441 { 1442 /* Flag this symbol as having a non-got, non-plt reference 1443 so that we generate copy relocs if it turns out to be 1444 dynamic. */ 1445 if (hh != NULL && !bfd_link_pic (info)) 1446 hh->eh.non_got_ref = 1; 1447 1448 /* If we are creating a shared library then we need to copy 1449 the reloc into the shared library. However, if we are 1450 linking with -Bsymbolic, we need only copy absolute 1451 relocs or relocs against symbols that are not defined in 1452 an object we are including in the link. PC- or DP- or 1453 DLT-relative relocs against any local sym or global sym 1454 with DEF_REGULAR set, can be discarded. At this point we 1455 have not seen all the input files, so it is possible that 1456 DEF_REGULAR is not set now but will be set later (it is 1457 never cleared). We account for that possibility below by 1458 storing information in the dyn_relocs field of the 1459 hash table entry. 1460 1461 A similar situation to the -Bsymbolic case occurs when 1462 creating shared libraries and symbol visibility changes 1463 render the symbol local. 1464 1465 As it turns out, all the relocs we will be creating here 1466 are absolute, so we cannot remove them on -Bsymbolic 1467 links or visibility changes anyway. A STUB_REL reloc 1468 is absolute too, as in that case it is the reloc in the 1469 stub we will be creating, rather than copying the PCREL 1470 reloc in the branch. 1471 1472 If on the other hand, we are creating an executable, we 1473 may need to keep relocations for symbols satisfied by a 1474 dynamic library if we manage to avoid copy relocs for the 1475 symbol. */ 1476 if ((bfd_link_pic (info) 1477 && (sec->flags & SEC_ALLOC) != 0 1478 && (IS_ABSOLUTE_RELOC (r_type) 1479 || (hh != NULL 1480 && (!SYMBOLIC_BIND (info, &hh->eh) 1481 || hh->eh.root.type == bfd_link_hash_defweak 1482 || !hh->eh.def_regular)))) 1483 || (ELIMINATE_COPY_RELOCS 1484 && !bfd_link_pic (info) 1485 && (sec->flags & SEC_ALLOC) != 0 1486 && hh != NULL 1487 && (hh->eh.root.type == bfd_link_hash_defweak 1488 || !hh->eh.def_regular))) 1489 { 1490 struct elf32_hppa_dyn_reloc_entry *hdh_p; 1491 struct elf32_hppa_dyn_reloc_entry **hdh_head; 1492 1493 /* Create a reloc section in dynobj and make room for 1494 this reloc. */ 1495 if (sreloc == NULL) 1496 { 1497 sreloc = _bfd_elf_make_dynamic_reloc_section 1498 (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE); 1499 1500 if (sreloc == NULL) 1501 { 1502 bfd_set_error (bfd_error_bad_value); 1503 return FALSE; 1504 } 1505 } 1506 1507 /* If this is a global symbol, we count the number of 1508 relocations we need for this symbol. */ 1509 if (hh != NULL) 1510 { 1511 hdh_head = &hh->dyn_relocs; 1512 } 1513 else 1514 { 1515 /* Track dynamic relocs needed for local syms too. 1516 We really need local syms available to do this 1517 easily. Oh well. */ 1518 asection *sr; 1519 void *vpp; 1520 Elf_Internal_Sym *isym; 1521 1522 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 1523 abfd, r_symndx); 1524 if (isym == NULL) 1525 return FALSE; 1526 1527 sr = bfd_section_from_elf_index (abfd, isym->st_shndx); 1528 if (sr == NULL) 1529 sr = sec; 1530 1531 vpp = &elf_section_data (sr)->local_dynrel; 1532 hdh_head = (struct elf32_hppa_dyn_reloc_entry **) vpp; 1533 } 1534 1535 hdh_p = *hdh_head; 1536 if (hdh_p == NULL || hdh_p->sec != sec) 1537 { 1538 hdh_p = bfd_alloc (htab->etab.dynobj, sizeof *hdh_p); 1539 if (hdh_p == NULL) 1540 return FALSE; 1541 hdh_p->hdh_next = *hdh_head; 1542 *hdh_head = hdh_p; 1543 hdh_p->sec = sec; 1544 hdh_p->count = 0; 1545 #if RELATIVE_DYNRELOCS 1546 hdh_p->relative_count = 0; 1547 #endif 1548 } 1549 1550 hdh_p->count += 1; 1551 #if RELATIVE_DYNRELOCS 1552 if (!IS_ABSOLUTE_RELOC (rtype)) 1553 hdh_p->relative_count += 1; 1554 #endif 1555 } 1556 } 1557 } 1558 1559 return TRUE; 1560 } 1561 1562 /* Return the section that should be marked against garbage collection 1563 for a given relocation. */ 1564 1565 static asection * 1566 elf32_hppa_gc_mark_hook (asection *sec, 1567 struct bfd_link_info *info, 1568 Elf_Internal_Rela *rela, 1569 struct elf_link_hash_entry *hh, 1570 Elf_Internal_Sym *sym) 1571 { 1572 if (hh != NULL) 1573 switch ((unsigned int) ELF32_R_TYPE (rela->r_info)) 1574 { 1575 case R_PARISC_GNU_VTINHERIT: 1576 case R_PARISC_GNU_VTENTRY: 1577 return NULL; 1578 } 1579 1580 return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym); 1581 } 1582 1583 /* Update the got and plt entry reference counts for the section being 1584 removed. */ 1585 1586 static bfd_boolean 1587 elf32_hppa_gc_sweep_hook (bfd *abfd, 1588 struct bfd_link_info *info ATTRIBUTE_UNUSED, 1589 asection *sec, 1590 const Elf_Internal_Rela *relocs) 1591 { 1592 Elf_Internal_Shdr *symtab_hdr; 1593 struct elf_link_hash_entry **eh_syms; 1594 bfd_signed_vma *local_got_refcounts; 1595 bfd_signed_vma *local_plt_refcounts; 1596 const Elf_Internal_Rela *rela, *relend; 1597 struct elf32_hppa_link_hash_table *htab; 1598 1599 if (bfd_link_relocatable (info)) 1600 return TRUE; 1601 1602 htab = hppa_link_hash_table (info); 1603 if (htab == NULL) 1604 return FALSE; 1605 1606 elf_section_data (sec)->local_dynrel = NULL; 1607 1608 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1609 eh_syms = elf_sym_hashes (abfd); 1610 local_got_refcounts = elf_local_got_refcounts (abfd); 1611 local_plt_refcounts = local_got_refcounts; 1612 if (local_plt_refcounts != NULL) 1613 local_plt_refcounts += symtab_hdr->sh_info; 1614 1615 relend = relocs + sec->reloc_count; 1616 for (rela = relocs; rela < relend; rela++) 1617 { 1618 unsigned long r_symndx; 1619 unsigned int r_type; 1620 struct elf_link_hash_entry *eh = NULL; 1621 1622 r_symndx = ELF32_R_SYM (rela->r_info); 1623 if (r_symndx >= symtab_hdr->sh_info) 1624 { 1625 struct elf32_hppa_link_hash_entry *hh; 1626 struct elf32_hppa_dyn_reloc_entry **hdh_pp; 1627 struct elf32_hppa_dyn_reloc_entry *hdh_p; 1628 1629 eh = eh_syms[r_symndx - symtab_hdr->sh_info]; 1630 while (eh->root.type == bfd_link_hash_indirect 1631 || eh->root.type == bfd_link_hash_warning) 1632 eh = (struct elf_link_hash_entry *) eh->root.u.i.link; 1633 hh = hppa_elf_hash_entry (eh); 1634 1635 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; hdh_pp = &hdh_p->hdh_next) 1636 if (hdh_p->sec == sec) 1637 { 1638 /* Everything must go for SEC. */ 1639 *hdh_pp = hdh_p->hdh_next; 1640 break; 1641 } 1642 } 1643 1644 r_type = ELF32_R_TYPE (rela->r_info); 1645 r_type = elf32_hppa_optimized_tls_reloc (info, r_type, eh != NULL); 1646 1647 switch (r_type) 1648 { 1649 case R_PARISC_DLTIND14F: 1650 case R_PARISC_DLTIND14R: 1651 case R_PARISC_DLTIND21L: 1652 case R_PARISC_TLS_GD21L: 1653 case R_PARISC_TLS_GD14R: 1654 case R_PARISC_TLS_IE21L: 1655 case R_PARISC_TLS_IE14R: 1656 if (eh != NULL) 1657 { 1658 if (eh->got.refcount > 0) 1659 eh->got.refcount -= 1; 1660 } 1661 else if (local_got_refcounts != NULL) 1662 { 1663 if (local_got_refcounts[r_symndx] > 0) 1664 local_got_refcounts[r_symndx] -= 1; 1665 } 1666 break; 1667 1668 case R_PARISC_TLS_LDM21L: 1669 case R_PARISC_TLS_LDM14R: 1670 htab->tls_ldm_got.refcount -= 1; 1671 break; 1672 1673 case R_PARISC_PCREL12F: 1674 case R_PARISC_PCREL17C: 1675 case R_PARISC_PCREL17F: 1676 case R_PARISC_PCREL22F: 1677 if (eh != NULL) 1678 { 1679 if (eh->plt.refcount > 0) 1680 eh->plt.refcount -= 1; 1681 } 1682 break; 1683 1684 case R_PARISC_PLABEL14R: 1685 case R_PARISC_PLABEL21L: 1686 case R_PARISC_PLABEL32: 1687 if (eh != NULL) 1688 { 1689 if (eh->plt.refcount > 0) 1690 eh->plt.refcount -= 1; 1691 } 1692 else if (local_plt_refcounts != NULL) 1693 { 1694 if (local_plt_refcounts[r_symndx] > 0) 1695 local_plt_refcounts[r_symndx] -= 1; 1696 } 1697 break; 1698 1699 default: 1700 break; 1701 } 1702 } 1703 1704 return TRUE; 1705 } 1706 1707 /* Support for core dump NOTE sections. */ 1708 1709 static bfd_boolean 1710 elf32_hppa_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 1711 { 1712 int offset; 1713 size_t size; 1714 1715 switch (note->descsz) 1716 { 1717 default: 1718 return FALSE; 1719 1720 case 396: /* Linux/hppa */ 1721 /* pr_cursig */ 1722 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 1723 1724 /* pr_pid */ 1725 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); 1726 1727 /* pr_reg */ 1728 offset = 72; 1729 size = 320; 1730 1731 break; 1732 } 1733 1734 /* Make a ".reg/999" section. */ 1735 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 1736 size, note->descpos + offset); 1737 } 1738 1739 static bfd_boolean 1740 elf32_hppa_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 1741 { 1742 switch (note->descsz) 1743 { 1744 default: 1745 return FALSE; 1746 1747 case 124: /* Linux/hppa elf_prpsinfo. */ 1748 elf_tdata (abfd)->core->program 1749 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); 1750 elf_tdata (abfd)->core->command 1751 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); 1752 } 1753 1754 /* Note that for some reason, a spurious space is tacked 1755 onto the end of the args in some (at least one anyway) 1756 implementations, so strip it off if it exists. */ 1757 { 1758 char *command = elf_tdata (abfd)->core->command; 1759 int n = strlen (command); 1760 1761 if (0 < n && command[n - 1] == ' ') 1762 command[n - 1] = '\0'; 1763 } 1764 1765 return TRUE; 1766 } 1767 1768 /* Our own version of hide_symbol, so that we can keep plt entries for 1769 plabels. */ 1770 1771 static void 1772 elf32_hppa_hide_symbol (struct bfd_link_info *info, 1773 struct elf_link_hash_entry *eh, 1774 bfd_boolean force_local) 1775 { 1776 if (force_local) 1777 { 1778 eh->forced_local = 1; 1779 if (eh->dynindx != -1) 1780 { 1781 eh->dynindx = -1; 1782 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 1783 eh->dynstr_index); 1784 } 1785 1786 /* PR 16082: Remove version information from hidden symbol. */ 1787 eh->verinfo.verdef = NULL; 1788 eh->verinfo.vertree = NULL; 1789 } 1790 1791 /* STT_GNU_IFUNC symbol must go through PLT. */ 1792 if (! hppa_elf_hash_entry (eh)->plabel 1793 && eh->type != STT_GNU_IFUNC) 1794 { 1795 eh->needs_plt = 0; 1796 eh->plt = elf_hash_table (info)->init_plt_offset; 1797 } 1798 } 1799 1800 /* Adjust a symbol defined by a dynamic object and referenced by a 1801 regular object. The current definition is in some section of the 1802 dynamic object, but we're not including those sections. We have to 1803 change the definition to something the rest of the link can 1804 understand. */ 1805 1806 static bfd_boolean 1807 elf32_hppa_adjust_dynamic_symbol (struct bfd_link_info *info, 1808 struct elf_link_hash_entry *eh) 1809 { 1810 struct elf32_hppa_link_hash_table *htab; 1811 asection *sec; 1812 1813 /* If this is a function, put it in the procedure linkage table. We 1814 will fill in the contents of the procedure linkage table later. */ 1815 if (eh->type == STT_FUNC 1816 || eh->needs_plt) 1817 { 1818 /* If the symbol is used by a plabel, we must allocate a PLT slot. 1819 The refcounts are not reliable when it has been hidden since 1820 hide_symbol can be called before the plabel flag is set. */ 1821 if (hppa_elf_hash_entry (eh)->plabel 1822 && eh->plt.refcount <= 0) 1823 eh->plt.refcount = 1; 1824 1825 if (eh->plt.refcount <= 0 1826 || (eh->def_regular 1827 && eh->root.type != bfd_link_hash_defweak 1828 && ! hppa_elf_hash_entry (eh)->plabel 1829 && (!bfd_link_pic (info) || SYMBOLIC_BIND (info, eh)))) 1830 { 1831 /* The .plt entry is not needed when: 1832 a) Garbage collection has removed all references to the 1833 symbol, or 1834 b) We know for certain the symbol is defined in this 1835 object, and it's not a weak definition, nor is the symbol 1836 used by a plabel relocation. Either this object is the 1837 application or we are doing a shared symbolic link. */ 1838 1839 eh->plt.offset = (bfd_vma) -1; 1840 eh->needs_plt = 0; 1841 } 1842 1843 return TRUE; 1844 } 1845 else 1846 eh->plt.offset = (bfd_vma) -1; 1847 1848 /* If this is a weak symbol, and there is a real definition, the 1849 processor independent code will have arranged for us to see the 1850 real definition first, and we can just use the same value. */ 1851 if (eh->u.weakdef != NULL) 1852 { 1853 if (eh->u.weakdef->root.type != bfd_link_hash_defined 1854 && eh->u.weakdef->root.type != bfd_link_hash_defweak) 1855 abort (); 1856 eh->root.u.def.section = eh->u.weakdef->root.u.def.section; 1857 eh->root.u.def.value = eh->u.weakdef->root.u.def.value; 1858 if (ELIMINATE_COPY_RELOCS) 1859 eh->non_got_ref = eh->u.weakdef->non_got_ref; 1860 return TRUE; 1861 } 1862 1863 /* This is a reference to a symbol defined by a dynamic object which 1864 is not a function. */ 1865 1866 /* If we are creating a shared library, we must presume that the 1867 only references to the symbol are via the global offset table. 1868 For such cases we need not do anything here; the relocations will 1869 be handled correctly by relocate_section. */ 1870 if (bfd_link_pic (info)) 1871 return TRUE; 1872 1873 /* If there are no references to this symbol that do not use the 1874 GOT, we don't need to generate a copy reloc. */ 1875 if (!eh->non_got_ref) 1876 return TRUE; 1877 1878 if (ELIMINATE_COPY_RELOCS) 1879 { 1880 struct elf32_hppa_link_hash_entry *hh; 1881 struct elf32_hppa_dyn_reloc_entry *hdh_p; 1882 1883 hh = hppa_elf_hash_entry (eh); 1884 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next) 1885 { 1886 sec = hdh_p->sec->output_section; 1887 if (sec != NULL && (sec->flags & SEC_READONLY) != 0) 1888 break; 1889 } 1890 1891 /* If we didn't find any dynamic relocs in read-only sections, then 1892 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 1893 if (hdh_p == NULL) 1894 { 1895 eh->non_got_ref = 0; 1896 return TRUE; 1897 } 1898 } 1899 1900 /* We must allocate the symbol in our .dynbss section, which will 1901 become part of the .bss section of the executable. There will be 1902 an entry for this symbol in the .dynsym section. The dynamic 1903 object will contain position independent code, so all references 1904 from the dynamic object to this symbol will go through the global 1905 offset table. The dynamic linker will use the .dynsym entry to 1906 determine the address it must put in the global offset table, so 1907 both the dynamic object and the regular object will refer to the 1908 same memory location for the variable. */ 1909 1910 htab = hppa_link_hash_table (info); 1911 if (htab == NULL) 1912 return FALSE; 1913 1914 /* We must generate a COPY reloc to tell the dynamic linker to 1915 copy the initial value out of the dynamic object and into the 1916 runtime process image. */ 1917 if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0) 1918 { 1919 htab->srelbss->size += sizeof (Elf32_External_Rela); 1920 eh->needs_copy = 1; 1921 } 1922 1923 sec = htab->sdynbss; 1924 1925 return _bfd_elf_adjust_dynamic_copy (info, eh, sec); 1926 } 1927 1928 /* Allocate space in the .plt for entries that won't have relocations. 1929 ie. plabel entries. */ 1930 1931 static bfd_boolean 1932 allocate_plt_static (struct elf_link_hash_entry *eh, void *inf) 1933 { 1934 struct bfd_link_info *info; 1935 struct elf32_hppa_link_hash_table *htab; 1936 struct elf32_hppa_link_hash_entry *hh; 1937 asection *sec; 1938 1939 if (eh->root.type == bfd_link_hash_indirect) 1940 return TRUE; 1941 1942 info = (struct bfd_link_info *) inf; 1943 hh = hppa_elf_hash_entry (eh); 1944 htab = hppa_link_hash_table (info); 1945 if (htab == NULL) 1946 return FALSE; 1947 1948 if (htab->etab.dynamic_sections_created 1949 && eh->plt.refcount > 0) 1950 { 1951 /* Make sure this symbol is output as a dynamic symbol. 1952 Undefined weak syms won't yet be marked as dynamic. */ 1953 if (eh->dynindx == -1 1954 && !eh->forced_local 1955 && eh->type != STT_PARISC_MILLI) 1956 { 1957 if (! bfd_elf_link_record_dynamic_symbol (info, eh)) 1958 return FALSE; 1959 } 1960 1961 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), eh)) 1962 { 1963 /* Allocate these later. From this point on, h->plabel 1964 means that the plt entry is only used by a plabel. 1965 We'll be using a normal plt entry for this symbol, so 1966 clear the plabel indicator. */ 1967 1968 hh->plabel = 0; 1969 } 1970 else if (hh->plabel) 1971 { 1972 /* Make an entry in the .plt section for plabel references 1973 that won't have a .plt entry for other reasons. */ 1974 sec = htab->splt; 1975 eh->plt.offset = sec->size; 1976 sec->size += PLT_ENTRY_SIZE; 1977 } 1978 else 1979 { 1980 /* No .plt entry needed. */ 1981 eh->plt.offset = (bfd_vma) -1; 1982 eh->needs_plt = 0; 1983 } 1984 } 1985 else 1986 { 1987 eh->plt.offset = (bfd_vma) -1; 1988 eh->needs_plt = 0; 1989 } 1990 1991 return TRUE; 1992 } 1993 1994 /* Allocate space in .plt, .got and associated reloc sections for 1995 global syms. */ 1996 1997 static bfd_boolean 1998 allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf) 1999 { 2000 struct bfd_link_info *info; 2001 struct elf32_hppa_link_hash_table *htab; 2002 asection *sec; 2003 struct elf32_hppa_link_hash_entry *hh; 2004 struct elf32_hppa_dyn_reloc_entry *hdh_p; 2005 2006 if (eh->root.type == bfd_link_hash_indirect) 2007 return TRUE; 2008 2009 info = inf; 2010 htab = hppa_link_hash_table (info); 2011 if (htab == NULL) 2012 return FALSE; 2013 2014 hh = hppa_elf_hash_entry (eh); 2015 2016 if (htab->etab.dynamic_sections_created 2017 && eh->plt.offset != (bfd_vma) -1 2018 && !hh->plabel 2019 && eh->plt.refcount > 0) 2020 { 2021 /* Make an entry in the .plt section. */ 2022 sec = htab->splt; 2023 eh->plt.offset = sec->size; 2024 sec->size += PLT_ENTRY_SIZE; 2025 2026 /* We also need to make an entry in the .rela.plt section. */ 2027 htab->srelplt->size += sizeof (Elf32_External_Rela); 2028 htab->need_plt_stub = 1; 2029 } 2030 2031 if (eh->got.refcount > 0) 2032 { 2033 /* Make sure this symbol is output as a dynamic symbol. 2034 Undefined weak syms won't yet be marked as dynamic. */ 2035 if (eh->dynindx == -1 2036 && !eh->forced_local 2037 && eh->type != STT_PARISC_MILLI) 2038 { 2039 if (! bfd_elf_link_record_dynamic_symbol (info, eh)) 2040 return FALSE; 2041 } 2042 2043 sec = htab->sgot; 2044 eh->got.offset = sec->size; 2045 sec->size += GOT_ENTRY_SIZE; 2046 /* R_PARISC_TLS_GD* needs two GOT entries */ 2047 if ((hh->tls_type & (GOT_TLS_GD | GOT_TLS_IE)) == (GOT_TLS_GD | GOT_TLS_IE)) 2048 sec->size += GOT_ENTRY_SIZE * 2; 2049 else if ((hh->tls_type & GOT_TLS_GD) == GOT_TLS_GD) 2050 sec->size += GOT_ENTRY_SIZE; 2051 if (htab->etab.dynamic_sections_created 2052 && (bfd_link_pic (info) 2053 || (eh->dynindx != -1 2054 && !eh->forced_local))) 2055 { 2056 htab->srelgot->size += sizeof (Elf32_External_Rela); 2057 if ((hh->tls_type & (GOT_TLS_GD | GOT_TLS_IE)) == (GOT_TLS_GD | GOT_TLS_IE)) 2058 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela); 2059 else if ((hh->tls_type & GOT_TLS_GD) == GOT_TLS_GD) 2060 htab->srelgot->size += sizeof (Elf32_External_Rela); 2061 } 2062 } 2063 else 2064 eh->got.offset = (bfd_vma) -1; 2065 2066 if (hh->dyn_relocs == NULL) 2067 return TRUE; 2068 2069 /* If this is a -Bsymbolic shared link, then we need to discard all 2070 space allocated for dynamic pc-relative relocs against symbols 2071 defined in a regular object. For the normal shared case, discard 2072 space for relocs that have become local due to symbol visibility 2073 changes. */ 2074 if (bfd_link_pic (info)) 2075 { 2076 #if RELATIVE_DYNRELOCS 2077 if (SYMBOL_CALLS_LOCAL (info, eh)) 2078 { 2079 struct elf32_hppa_dyn_reloc_entry **hdh_pp; 2080 2081 for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; ) 2082 { 2083 hdh_p->count -= hdh_p->relative_count; 2084 hdh_p->relative_count = 0; 2085 if (hdh_p->count == 0) 2086 *hdh_pp = hdh_p->hdh_next; 2087 else 2088 hdh_pp = &hdh_p->hdh_next; 2089 } 2090 } 2091 #endif 2092 2093 /* Also discard relocs on undefined weak syms with non-default 2094 visibility. */ 2095 if (hh->dyn_relocs != NULL 2096 && eh->root.type == bfd_link_hash_undefweak) 2097 { 2098 if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT) 2099 hh->dyn_relocs = NULL; 2100 2101 /* Make sure undefined weak symbols are output as a dynamic 2102 symbol in PIEs. */ 2103 else if (eh->dynindx == -1 2104 && !eh->forced_local) 2105 { 2106 if (! bfd_elf_link_record_dynamic_symbol (info, eh)) 2107 return FALSE; 2108 } 2109 } 2110 } 2111 else 2112 { 2113 /* For the non-shared case, discard space for relocs against 2114 symbols which turn out to need copy relocs or are not 2115 dynamic. */ 2116 2117 if (!eh->non_got_ref 2118 && ((ELIMINATE_COPY_RELOCS 2119 && eh->def_dynamic 2120 && !eh->def_regular) 2121 || (htab->etab.dynamic_sections_created 2122 && (eh->root.type == bfd_link_hash_undefweak 2123 || eh->root.type == bfd_link_hash_undefined)))) 2124 { 2125 /* Make sure this symbol is output as a dynamic symbol. 2126 Undefined weak syms won't yet be marked as dynamic. */ 2127 if (eh->dynindx == -1 2128 && !eh->forced_local 2129 && eh->type != STT_PARISC_MILLI) 2130 { 2131 if (! bfd_elf_link_record_dynamic_symbol (info, eh)) 2132 return FALSE; 2133 } 2134 2135 /* If that succeeded, we know we'll be keeping all the 2136 relocs. */ 2137 if (eh->dynindx != -1) 2138 goto keep; 2139 } 2140 2141 hh->dyn_relocs = NULL; 2142 return TRUE; 2143 2144 keep: ; 2145 } 2146 2147 /* Finally, allocate space. */ 2148 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next) 2149 { 2150 asection *sreloc = elf_section_data (hdh_p->sec)->sreloc; 2151 sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela); 2152 } 2153 2154 return TRUE; 2155 } 2156 2157 /* This function is called via elf_link_hash_traverse to force 2158 millicode symbols local so they do not end up as globals in the 2159 dynamic symbol table. We ought to be able to do this in 2160 adjust_dynamic_symbol, but our adjust_dynamic_symbol is not called 2161 for all dynamic symbols. Arguably, this is a bug in 2162 elf_adjust_dynamic_symbol. */ 2163 2164 static bfd_boolean 2165 clobber_millicode_symbols (struct elf_link_hash_entry *eh, 2166 struct bfd_link_info *info) 2167 { 2168 if (eh->type == STT_PARISC_MILLI 2169 && !eh->forced_local) 2170 { 2171 elf32_hppa_hide_symbol (info, eh, TRUE); 2172 } 2173 return TRUE; 2174 } 2175 2176 /* Find any dynamic relocs that apply to read-only sections. */ 2177 2178 static bfd_boolean 2179 readonly_dynrelocs (struct elf_link_hash_entry *eh, void *inf) 2180 { 2181 struct elf32_hppa_link_hash_entry *hh; 2182 struct elf32_hppa_dyn_reloc_entry *hdh_p; 2183 2184 hh = hppa_elf_hash_entry (eh); 2185 for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next) 2186 { 2187 asection *sec = hdh_p->sec->output_section; 2188 2189 if (sec != NULL && (sec->flags & SEC_READONLY) != 0) 2190 { 2191 struct bfd_link_info *info = inf; 2192 2193 if (info->warn_shared_textrel) 2194 (*_bfd_error_handler) 2195 (_("warning: dynamic relocation to `%s' in readonly section `%s'"), 2196 eh->root.root.string, sec->name); 2197 info->flags |= DF_TEXTREL; 2198 2199 /* Not an error, just cut short the traversal. */ 2200 return FALSE; 2201 } 2202 } 2203 return TRUE; 2204 } 2205 2206 /* Set the sizes of the dynamic sections. */ 2207 2208 static bfd_boolean 2209 elf32_hppa_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 2210 struct bfd_link_info *info) 2211 { 2212 struct elf32_hppa_link_hash_table *htab; 2213 bfd *dynobj; 2214 bfd *ibfd; 2215 asection *sec; 2216 bfd_boolean relocs; 2217 2218 htab = hppa_link_hash_table (info); 2219 if (htab == NULL) 2220 return FALSE; 2221 2222 dynobj = htab->etab.dynobj; 2223 if (dynobj == NULL) 2224 abort (); 2225 2226 if (htab->etab.dynamic_sections_created) 2227 { 2228 /* Set the contents of the .interp section to the interpreter. */ 2229 if (bfd_link_executable (info) && !info->nointerp) 2230 { 2231 sec = bfd_get_linker_section (dynobj, ".interp"); 2232 if (sec == NULL) 2233 abort (); 2234 sec->size = sizeof ELF_DYNAMIC_INTERPRETER; 2235 sec->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 2236 } 2237 2238 /* Force millicode symbols local. */ 2239 elf_link_hash_traverse (&htab->etab, 2240 clobber_millicode_symbols, 2241 info); 2242 } 2243 2244 /* Set up .got and .plt offsets for local syms, and space for local 2245 dynamic relocs. */ 2246 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 2247 { 2248 bfd_signed_vma *local_got; 2249 bfd_signed_vma *end_local_got; 2250 bfd_signed_vma *local_plt; 2251 bfd_signed_vma *end_local_plt; 2252 bfd_size_type locsymcount; 2253 Elf_Internal_Shdr *symtab_hdr; 2254 asection *srel; 2255 char *local_tls_type; 2256 2257 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 2258 continue; 2259 2260 for (sec = ibfd->sections; sec != NULL; sec = sec->next) 2261 { 2262 struct elf32_hppa_dyn_reloc_entry *hdh_p; 2263 2264 for (hdh_p = ((struct elf32_hppa_dyn_reloc_entry *) 2265 elf_section_data (sec)->local_dynrel); 2266 hdh_p != NULL; 2267 hdh_p = hdh_p->hdh_next) 2268 { 2269 if (!bfd_is_abs_section (hdh_p->sec) 2270 && bfd_is_abs_section (hdh_p->sec->output_section)) 2271 { 2272 /* Input section has been discarded, either because 2273 it is a copy of a linkonce section or due to 2274 linker script /DISCARD/, so we'll be discarding 2275 the relocs too. */ 2276 } 2277 else if (hdh_p->count != 0) 2278 { 2279 srel = elf_section_data (hdh_p->sec)->sreloc; 2280 srel->size += hdh_p->count * sizeof (Elf32_External_Rela); 2281 if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0) 2282 info->flags |= DF_TEXTREL; 2283 } 2284 } 2285 } 2286 2287 local_got = elf_local_got_refcounts (ibfd); 2288 if (!local_got) 2289 continue; 2290 2291 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2292 locsymcount = symtab_hdr->sh_info; 2293 end_local_got = local_got + locsymcount; 2294 local_tls_type = hppa_elf_local_got_tls_type (ibfd); 2295 sec = htab->sgot; 2296 srel = htab->srelgot; 2297 for (; local_got < end_local_got; ++local_got) 2298 { 2299 if (*local_got > 0) 2300 { 2301 *local_got = sec->size; 2302 sec->size += GOT_ENTRY_SIZE; 2303 if ((*local_tls_type & (GOT_TLS_GD | GOT_TLS_IE)) == (GOT_TLS_GD | GOT_TLS_IE)) 2304 sec->size += 2 * GOT_ENTRY_SIZE; 2305 else if ((*local_tls_type & GOT_TLS_GD) == GOT_TLS_GD) 2306 sec->size += GOT_ENTRY_SIZE; 2307 if (bfd_link_pic (info)) 2308 { 2309 srel->size += sizeof (Elf32_External_Rela); 2310 if ((*local_tls_type & (GOT_TLS_GD | GOT_TLS_IE)) == (GOT_TLS_GD | GOT_TLS_IE)) 2311 srel->size += 2 * sizeof (Elf32_External_Rela); 2312 else if ((*local_tls_type & GOT_TLS_GD) == GOT_TLS_GD) 2313 srel->size += sizeof (Elf32_External_Rela); 2314 } 2315 } 2316 else 2317 *local_got = (bfd_vma) -1; 2318 2319 ++local_tls_type; 2320 } 2321 2322 local_plt = end_local_got; 2323 end_local_plt = local_plt + locsymcount; 2324 if (! htab->etab.dynamic_sections_created) 2325 { 2326 /* Won't be used, but be safe. */ 2327 for (; local_plt < end_local_plt; ++local_plt) 2328 *local_plt = (bfd_vma) -1; 2329 } 2330 else 2331 { 2332 sec = htab->splt; 2333 srel = htab->srelplt; 2334 for (; local_plt < end_local_plt; ++local_plt) 2335 { 2336 if (*local_plt > 0) 2337 { 2338 *local_plt = sec->size; 2339 sec->size += PLT_ENTRY_SIZE; 2340 if (bfd_link_pic (info)) 2341 srel->size += sizeof (Elf32_External_Rela); 2342 } 2343 else 2344 *local_plt = (bfd_vma) -1; 2345 } 2346 } 2347 } 2348 2349 if (htab->tls_ldm_got.refcount > 0) 2350 { 2351 /* Allocate 2 got entries and 1 dynamic reloc for 2352 R_PARISC_TLS_DTPMOD32 relocs. */ 2353 htab->tls_ldm_got.offset = htab->sgot->size; 2354 htab->sgot->size += (GOT_ENTRY_SIZE * 2); 2355 htab->srelgot->size += sizeof (Elf32_External_Rela); 2356 } 2357 else 2358 htab->tls_ldm_got.offset = -1; 2359 2360 /* Do all the .plt entries without relocs first. The dynamic linker 2361 uses the last .plt reloc to find the end of the .plt (and hence 2362 the start of the .got) for lazy linking. */ 2363 elf_link_hash_traverse (&htab->etab, allocate_plt_static, info); 2364 2365 /* Allocate global sym .plt and .got entries, and space for global 2366 sym dynamic relocs. */ 2367 elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info); 2368 2369 /* The check_relocs and adjust_dynamic_symbol entry points have 2370 determined the sizes of the various dynamic sections. Allocate 2371 memory for them. */ 2372 relocs = FALSE; 2373 for (sec = dynobj->sections; sec != NULL; sec = sec->next) 2374 { 2375 if ((sec->flags & SEC_LINKER_CREATED) == 0) 2376 continue; 2377 2378 if (sec == htab->splt) 2379 { 2380 if (htab->need_plt_stub) 2381 { 2382 /* Make space for the plt stub at the end of the .plt 2383 section. We want this stub right at the end, up 2384 against the .got section. */ 2385 int gotalign = bfd_section_alignment (dynobj, htab->sgot); 2386 int pltalign = bfd_section_alignment (dynobj, sec); 2387 bfd_size_type mask; 2388 2389 if (gotalign > pltalign) 2390 (void) bfd_set_section_alignment (dynobj, sec, gotalign); 2391 mask = ((bfd_size_type) 1 << gotalign) - 1; 2392 sec->size = (sec->size + sizeof (plt_stub) + mask) & ~mask; 2393 } 2394 } 2395 else if (sec == htab->sgot 2396 || sec == htab->sdynbss) 2397 ; 2398 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, sec), ".rela")) 2399 { 2400 if (sec->size != 0) 2401 { 2402 /* Remember whether there are any reloc sections other 2403 than .rela.plt. */ 2404 if (sec != htab->srelplt) 2405 relocs = TRUE; 2406 2407 /* We use the reloc_count field as a counter if we need 2408 to copy relocs into the output file. */ 2409 sec->reloc_count = 0; 2410 } 2411 } 2412 else 2413 { 2414 /* It's not one of our sections, so don't allocate space. */ 2415 continue; 2416 } 2417 2418 if (sec->size == 0) 2419 { 2420 /* If we don't need this section, strip it from the 2421 output file. This is mostly to handle .rela.bss and 2422 .rela.plt. We must create both sections in 2423 create_dynamic_sections, because they must be created 2424 before the linker maps input sections to output 2425 sections. The linker does that before 2426 adjust_dynamic_symbol is called, and it is that 2427 function which decides whether anything needs to go 2428 into these sections. */ 2429 sec->flags |= SEC_EXCLUDE; 2430 continue; 2431 } 2432 2433 if ((sec->flags & SEC_HAS_CONTENTS) == 0) 2434 continue; 2435 2436 /* Allocate memory for the section contents. Zero it, because 2437 we may not fill in all the reloc sections. */ 2438 sec->contents = bfd_zalloc (dynobj, sec->size); 2439 if (sec->contents == NULL) 2440 return FALSE; 2441 } 2442 2443 if (htab->etab.dynamic_sections_created) 2444 { 2445 /* Like IA-64 and HPPA64, always create a DT_PLTGOT. It 2446 actually has nothing to do with the PLT, it is how we 2447 communicate the LTP value of a load module to the dynamic 2448 linker. */ 2449 #define add_dynamic_entry(TAG, VAL) \ 2450 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2451 2452 if (!add_dynamic_entry (DT_PLTGOT, 0)) 2453 return FALSE; 2454 2455 /* Add some entries to the .dynamic section. We fill in the 2456 values later, in elf32_hppa_finish_dynamic_sections, but we 2457 must add the entries now so that we get the correct size for 2458 the .dynamic section. The DT_DEBUG entry is filled in by the 2459 dynamic linker and used by the debugger. */ 2460 if (bfd_link_executable (info)) 2461 { 2462 if (!add_dynamic_entry (DT_DEBUG, 0)) 2463 return FALSE; 2464 } 2465 2466 if (htab->srelplt->size != 0) 2467 { 2468 if (!add_dynamic_entry (DT_PLTRELSZ, 0) 2469 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 2470 || !add_dynamic_entry (DT_JMPREL, 0)) 2471 return FALSE; 2472 } 2473 2474 if (relocs) 2475 { 2476 if (!add_dynamic_entry (DT_RELA, 0) 2477 || !add_dynamic_entry (DT_RELASZ, 0) 2478 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 2479 return FALSE; 2480 2481 /* If any dynamic relocs apply to a read-only section, 2482 then we need a DT_TEXTREL entry. */ 2483 if ((info->flags & DF_TEXTREL) == 0) 2484 elf_link_hash_traverse (&htab->etab, readonly_dynrelocs, info); 2485 2486 if ((info->flags & DF_TEXTREL) != 0) 2487 { 2488 if (!add_dynamic_entry (DT_TEXTREL, 0)) 2489 return FALSE; 2490 } 2491 } 2492 } 2493 #undef add_dynamic_entry 2494 2495 return TRUE; 2496 } 2497 2498 /* External entry points for sizing and building linker stubs. */ 2499 2500 /* Set up various things so that we can make a list of input sections 2501 for each output section included in the link. Returns -1 on error, 2502 0 when no stubs will be needed, and 1 on success. */ 2503 2504 int 2505 elf32_hppa_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info) 2506 { 2507 bfd *input_bfd; 2508 unsigned int bfd_count; 2509 unsigned int top_id, top_index; 2510 asection *section; 2511 asection **input_list, **list; 2512 bfd_size_type amt; 2513 struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info); 2514 2515 if (htab == NULL) 2516 return -1; 2517 2518 /* Count the number of input BFDs and find the top input section id. */ 2519 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; 2520 input_bfd != NULL; 2521 input_bfd = input_bfd->link.next) 2522 { 2523 bfd_count += 1; 2524 for (section = input_bfd->sections; 2525 section != NULL; 2526 section = section->next) 2527 { 2528 if (top_id < section->id) 2529 top_id = section->id; 2530 } 2531 } 2532 htab->bfd_count = bfd_count; 2533 2534 amt = sizeof (struct map_stub) * (top_id + 1); 2535 htab->stub_group = bfd_zmalloc (amt); 2536 if (htab->stub_group == NULL) 2537 return -1; 2538 2539 /* We can't use output_bfd->section_count here to find the top output 2540 section index as some sections may have been removed, and 2541 strip_excluded_output_sections doesn't renumber the indices. */ 2542 for (section = output_bfd->sections, top_index = 0; 2543 section != NULL; 2544 section = section->next) 2545 { 2546 if (top_index < section->index) 2547 top_index = section->index; 2548 } 2549 2550 htab->top_index = top_index; 2551 amt = sizeof (asection *) * (top_index + 1); 2552 input_list = bfd_malloc (amt); 2553 htab->input_list = input_list; 2554 if (input_list == NULL) 2555 return -1; 2556 2557 /* For sections we aren't interested in, mark their entries with a 2558 value we can check later. */ 2559 list = input_list + top_index; 2560 do 2561 *list = bfd_abs_section_ptr; 2562 while (list-- != input_list); 2563 2564 for (section = output_bfd->sections; 2565 section != NULL; 2566 section = section->next) 2567 { 2568 if ((section->flags & SEC_CODE) != 0) 2569 input_list[section->index] = NULL; 2570 } 2571 2572 return 1; 2573 } 2574 2575 /* The linker repeatedly calls this function for each input section, 2576 in the order that input sections are linked into output sections. 2577 Build lists of input sections to determine groupings between which 2578 we may insert linker stubs. */ 2579 2580 void 2581 elf32_hppa_next_input_section (struct bfd_link_info *info, asection *isec) 2582 { 2583 struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info); 2584 2585 if (htab == NULL) 2586 return; 2587 2588 if (isec->output_section->index <= htab->top_index) 2589 { 2590 asection **list = htab->input_list + isec->output_section->index; 2591 if (*list != bfd_abs_section_ptr) 2592 { 2593 /* Steal the link_sec pointer for our list. */ 2594 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) 2595 /* This happens to make the list in reverse order, 2596 which is what we want. */ 2597 PREV_SEC (isec) = *list; 2598 *list = isec; 2599 } 2600 } 2601 } 2602 2603 /* See whether we can group stub sections together. Grouping stub 2604 sections may result in fewer stubs. More importantly, we need to 2605 put all .init* and .fini* stubs at the beginning of the .init or 2606 .fini output sections respectively, because glibc splits the 2607 _init and _fini functions into multiple parts. Putting a stub in 2608 the middle of a function is not a good idea. */ 2609 2610 static void 2611 group_sections (struct elf32_hppa_link_hash_table *htab, 2612 bfd_size_type stub_group_size, 2613 bfd_boolean stubs_always_before_branch) 2614 { 2615 asection **list = htab->input_list + htab->top_index; 2616 do 2617 { 2618 asection *tail = *list; 2619 if (tail == bfd_abs_section_ptr) 2620 continue; 2621 while (tail != NULL) 2622 { 2623 asection *curr; 2624 asection *prev; 2625 bfd_size_type total; 2626 bfd_boolean big_sec; 2627 2628 curr = tail; 2629 total = tail->size; 2630 big_sec = total >= stub_group_size; 2631 2632 while ((prev = PREV_SEC (curr)) != NULL 2633 && ((total += curr->output_offset - prev->output_offset) 2634 < stub_group_size)) 2635 curr = prev; 2636 2637 /* OK, the size from the start of CURR to the end is less 2638 than 240000 bytes and thus can be handled by one stub 2639 section. (or the tail section is itself larger than 2640 240000 bytes, in which case we may be toast.) 2641 We should really be keeping track of the total size of 2642 stubs added here, as stubs contribute to the final output 2643 section size. That's a little tricky, and this way will 2644 only break if stubs added total more than 22144 bytes, or 2645 2768 long branch stubs. It seems unlikely for more than 2646 2768 different functions to be called, especially from 2647 code only 240000 bytes long. This limit used to be 2648 250000, but c++ code tends to generate lots of little 2649 functions, and sometimes violated the assumption. */ 2650 do 2651 { 2652 prev = PREV_SEC (tail); 2653 /* Set up this stub group. */ 2654 htab->stub_group[tail->id].link_sec = curr; 2655 } 2656 while (tail != curr && (tail = prev) != NULL); 2657 2658 /* But wait, there's more! Input sections up to 240000 2659 bytes before the stub section can be handled by it too. 2660 Don't do this if we have a really large section after the 2661 stubs, as adding more stubs increases the chance that 2662 branches may not reach into the stub section. */ 2663 if (!stubs_always_before_branch && !big_sec) 2664 { 2665 total = 0; 2666 while (prev != NULL 2667 && ((total += tail->output_offset - prev->output_offset) 2668 < stub_group_size)) 2669 { 2670 tail = prev; 2671 prev = PREV_SEC (tail); 2672 htab->stub_group[tail->id].link_sec = curr; 2673 } 2674 } 2675 tail = prev; 2676 } 2677 } 2678 while (list-- != htab->input_list); 2679 free (htab->input_list); 2680 #undef PREV_SEC 2681 } 2682 2683 /* Read in all local syms for all input bfds, and create hash entries 2684 for export stubs if we are building a multi-subspace shared lib. 2685 Returns -1 on error, 1 if export stubs created, 0 otherwise. */ 2686 2687 static int 2688 get_local_syms (bfd *output_bfd, bfd *input_bfd, struct bfd_link_info *info) 2689 { 2690 unsigned int bfd_indx; 2691 Elf_Internal_Sym *local_syms, **all_local_syms; 2692 int stub_changed = 0; 2693 struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info); 2694 2695 if (htab == NULL) 2696 return -1; 2697 2698 /* We want to read in symbol extension records only once. To do this 2699 we need to read in the local symbols in parallel and save them for 2700 later use; so hold pointers to the local symbols in an array. */ 2701 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count; 2702 all_local_syms = bfd_zmalloc (amt); 2703 htab->all_local_syms = all_local_syms; 2704 if (all_local_syms == NULL) 2705 return -1; 2706 2707 /* Walk over all the input BFDs, swapping in local symbols. 2708 If we are creating a shared library, create hash entries for the 2709 export stubs. */ 2710 for (bfd_indx = 0; 2711 input_bfd != NULL; 2712 input_bfd = input_bfd->link.next, bfd_indx++) 2713 { 2714 Elf_Internal_Shdr *symtab_hdr; 2715 2716 /* We'll need the symbol table in a second. */ 2717 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 2718 if (symtab_hdr->sh_info == 0) 2719 continue; 2720 2721 /* We need an array of the local symbols attached to the input bfd. */ 2722 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; 2723 if (local_syms == NULL) 2724 { 2725 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, 2726 symtab_hdr->sh_info, 0, 2727 NULL, NULL, NULL); 2728 /* Cache them for elf_link_input_bfd. */ 2729 symtab_hdr->contents = (unsigned char *) local_syms; 2730 } 2731 if (local_syms == NULL) 2732 return -1; 2733 2734 all_local_syms[bfd_indx] = local_syms; 2735 2736 if (bfd_link_pic (info) && htab->multi_subspace) 2737 { 2738 struct elf_link_hash_entry **eh_syms; 2739 struct elf_link_hash_entry **eh_symend; 2740 unsigned int symcount; 2741 2742 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) 2743 - symtab_hdr->sh_info); 2744 eh_syms = (struct elf_link_hash_entry **) elf_sym_hashes (input_bfd); 2745 eh_symend = (struct elf_link_hash_entry **) (eh_syms + symcount); 2746 2747 /* Look through the global syms for functions; We need to 2748 build export stubs for all globally visible functions. */ 2749 for (; eh_syms < eh_symend; eh_syms++) 2750 { 2751 struct elf32_hppa_link_hash_entry *hh; 2752 2753 hh = hppa_elf_hash_entry (*eh_syms); 2754 2755 while (hh->eh.root.type == bfd_link_hash_indirect 2756 || hh->eh.root.type == bfd_link_hash_warning) 2757 hh = hppa_elf_hash_entry (hh->eh.root.u.i.link); 2758 2759 /* At this point in the link, undefined syms have been 2760 resolved, so we need to check that the symbol was 2761 defined in this BFD. */ 2762 if ((hh->eh.root.type == bfd_link_hash_defined 2763 || hh->eh.root.type == bfd_link_hash_defweak) 2764 && hh->eh.type == STT_FUNC 2765 && hh->eh.root.u.def.section->output_section != NULL 2766 && (hh->eh.root.u.def.section->output_section->owner 2767 == output_bfd) 2768 && hh->eh.root.u.def.section->owner == input_bfd 2769 && hh->eh.def_regular 2770 && !hh->eh.forced_local 2771 && ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT) 2772 { 2773 asection *sec; 2774 const char *stub_name; 2775 struct elf32_hppa_stub_hash_entry *hsh; 2776 2777 sec = hh->eh.root.u.def.section; 2778 stub_name = hh_name (hh); 2779 hsh = hppa_stub_hash_lookup (&htab->bstab, 2780 stub_name, 2781 FALSE, FALSE); 2782 if (hsh == NULL) 2783 { 2784 hsh = hppa_add_stub (stub_name, sec, htab); 2785 if (!hsh) 2786 return -1; 2787 2788 hsh->target_value = hh->eh.root.u.def.value; 2789 hsh->target_section = hh->eh.root.u.def.section; 2790 hsh->stub_type = hppa_stub_export; 2791 hsh->hh = hh; 2792 stub_changed = 1; 2793 } 2794 else 2795 { 2796 (*_bfd_error_handler) (_("%B: duplicate export stub %s"), 2797 input_bfd, 2798 stub_name); 2799 } 2800 } 2801 } 2802 } 2803 } 2804 2805 return stub_changed; 2806 } 2807 2808 /* Determine and set the size of the stub section for a final link. 2809 2810 The basic idea here is to examine all the relocations looking for 2811 PC-relative calls to a target that is unreachable with a "bl" 2812 instruction. */ 2813 2814 bfd_boolean 2815 elf32_hppa_size_stubs 2816 (bfd *output_bfd, bfd *stub_bfd, struct bfd_link_info *info, 2817 bfd_boolean multi_subspace, bfd_signed_vma group_size, 2818 asection * (*add_stub_section) (const char *, asection *), 2819 void (*layout_sections_again) (void)) 2820 { 2821 bfd_size_type stub_group_size; 2822 bfd_boolean stubs_always_before_branch; 2823 bfd_boolean stub_changed; 2824 struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info); 2825 2826 if (htab == NULL) 2827 return FALSE; 2828 2829 /* Stash our params away. */ 2830 htab->stub_bfd = stub_bfd; 2831 htab->multi_subspace = multi_subspace; 2832 htab->add_stub_section = add_stub_section; 2833 htab->layout_sections_again = layout_sections_again; 2834 stubs_always_before_branch = group_size < 0; 2835 if (group_size < 0) 2836 stub_group_size = -group_size; 2837 else 2838 stub_group_size = group_size; 2839 if (stub_group_size == 1) 2840 { 2841 /* Default values. */ 2842 if (stubs_always_before_branch) 2843 { 2844 stub_group_size = 7680000; 2845 if (htab->has_17bit_branch || htab->multi_subspace) 2846 stub_group_size = 240000; 2847 if (htab->has_12bit_branch) 2848 stub_group_size = 7500; 2849 } 2850 else 2851 { 2852 stub_group_size = 6971392; 2853 if (htab->has_17bit_branch || htab->multi_subspace) 2854 stub_group_size = 217856; 2855 if (htab->has_12bit_branch) 2856 stub_group_size = 6808; 2857 } 2858 } 2859 2860 group_sections (htab, stub_group_size, stubs_always_before_branch); 2861 2862 switch (get_local_syms (output_bfd, info->input_bfds, info)) 2863 { 2864 default: 2865 if (htab->all_local_syms) 2866 goto error_ret_free_local; 2867 return FALSE; 2868 2869 case 0: 2870 stub_changed = FALSE; 2871 break; 2872 2873 case 1: 2874 stub_changed = TRUE; 2875 break; 2876 } 2877 2878 while (1) 2879 { 2880 bfd *input_bfd; 2881 unsigned int bfd_indx; 2882 asection *stub_sec; 2883 2884 for (input_bfd = info->input_bfds, bfd_indx = 0; 2885 input_bfd != NULL; 2886 input_bfd = input_bfd->link.next, bfd_indx++) 2887 { 2888 Elf_Internal_Shdr *symtab_hdr; 2889 asection *section; 2890 Elf_Internal_Sym *local_syms; 2891 2892 /* We'll need the symbol table in a second. */ 2893 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 2894 if (symtab_hdr->sh_info == 0) 2895 continue; 2896 2897 local_syms = htab->all_local_syms[bfd_indx]; 2898 2899 /* Walk over each section attached to the input bfd. */ 2900 for (section = input_bfd->sections; 2901 section != NULL; 2902 section = section->next) 2903 { 2904 Elf_Internal_Rela *internal_relocs, *irelaend, *irela; 2905 2906 /* If there aren't any relocs, then there's nothing more 2907 to do. */ 2908 if ((section->flags & SEC_RELOC) == 0 2909 || section->reloc_count == 0) 2910 continue; 2911 2912 /* If this section is a link-once section that will be 2913 discarded, then don't create any stubs. */ 2914 if (section->output_section == NULL 2915 || section->output_section->owner != output_bfd) 2916 continue; 2917 2918 /* Get the relocs. */ 2919 internal_relocs 2920 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, 2921 info->keep_memory); 2922 if (internal_relocs == NULL) 2923 goto error_ret_free_local; 2924 2925 /* Now examine each relocation. */ 2926 irela = internal_relocs; 2927 irelaend = irela + section->reloc_count; 2928 for (; irela < irelaend; irela++) 2929 { 2930 unsigned int r_type, r_indx; 2931 enum elf32_hppa_stub_type stub_type; 2932 struct elf32_hppa_stub_hash_entry *hsh; 2933 asection *sym_sec; 2934 bfd_vma sym_value; 2935 bfd_vma destination; 2936 struct elf32_hppa_link_hash_entry *hh; 2937 char *stub_name; 2938 const asection *id_sec; 2939 2940 r_type = ELF32_R_TYPE (irela->r_info); 2941 r_indx = ELF32_R_SYM (irela->r_info); 2942 2943 if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED) 2944 { 2945 bfd_set_error (bfd_error_bad_value); 2946 error_ret_free_internal: 2947 if (elf_section_data (section)->relocs == NULL) 2948 free (internal_relocs); 2949 goto error_ret_free_local; 2950 } 2951 2952 /* Only look for stubs on call instructions. */ 2953 if (r_type != (unsigned int) R_PARISC_PCREL12F 2954 && r_type != (unsigned int) R_PARISC_PCREL17F 2955 && r_type != (unsigned int) R_PARISC_PCREL22F) 2956 continue; 2957 2958 /* Now determine the call target, its name, value, 2959 section. */ 2960 sym_sec = NULL; 2961 sym_value = 0; 2962 destination = 0; 2963 hh = NULL; 2964 if (r_indx < symtab_hdr->sh_info) 2965 { 2966 /* It's a local symbol. */ 2967 Elf_Internal_Sym *sym; 2968 Elf_Internal_Shdr *hdr; 2969 unsigned int shndx; 2970 2971 sym = local_syms + r_indx; 2972 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) 2973 sym_value = sym->st_value; 2974 shndx = sym->st_shndx; 2975 if (shndx < elf_numsections (input_bfd)) 2976 { 2977 hdr = elf_elfsections (input_bfd)[shndx]; 2978 sym_sec = hdr->bfd_section; 2979 destination = (sym_value + irela->r_addend 2980 + sym_sec->output_offset 2981 + sym_sec->output_section->vma); 2982 } 2983 } 2984 else 2985 { 2986 /* It's an external symbol. */ 2987 int e_indx; 2988 2989 e_indx = r_indx - symtab_hdr->sh_info; 2990 hh = hppa_elf_hash_entry (elf_sym_hashes (input_bfd)[e_indx]); 2991 2992 while (hh->eh.root.type == bfd_link_hash_indirect 2993 || hh->eh.root.type == bfd_link_hash_warning) 2994 hh = hppa_elf_hash_entry (hh->eh.root.u.i.link); 2995 2996 if (hh->eh.root.type == bfd_link_hash_defined 2997 || hh->eh.root.type == bfd_link_hash_defweak) 2998 { 2999 sym_sec = hh->eh.root.u.def.section; 3000 sym_value = hh->eh.root.u.def.value; 3001 if (sym_sec->output_section != NULL) 3002 destination = (sym_value + irela->r_addend 3003 + sym_sec->output_offset 3004 + sym_sec->output_section->vma); 3005 } 3006 else if (hh->eh.root.type == bfd_link_hash_undefweak) 3007 { 3008 if (! bfd_link_pic (info)) 3009 continue; 3010 } 3011 else if (hh->eh.root.type == bfd_link_hash_undefined) 3012 { 3013 if (! (info->unresolved_syms_in_objects == RM_IGNORE 3014 && (ELF_ST_VISIBILITY (hh->eh.other) 3015 == STV_DEFAULT) 3016 && hh->eh.type != STT_PARISC_MILLI)) 3017 continue; 3018 } 3019 else 3020 { 3021 bfd_set_error (bfd_error_bad_value); 3022 goto error_ret_free_internal; 3023 } 3024 } 3025 3026 /* Determine what (if any) linker stub is needed. */ 3027 stub_type = hppa_type_of_stub (section, irela, hh, 3028 destination, info); 3029 if (stub_type == hppa_stub_none) 3030 continue; 3031 3032 /* Support for grouping stub sections. */ 3033 id_sec = htab->stub_group[section->id].link_sec; 3034 3035 /* Get the name of this stub. */ 3036 stub_name = hppa_stub_name (id_sec, sym_sec, hh, irela); 3037 if (!stub_name) 3038 goto error_ret_free_internal; 3039 3040 hsh = hppa_stub_hash_lookup (&htab->bstab, 3041 stub_name, 3042 FALSE, FALSE); 3043 if (hsh != NULL) 3044 { 3045 /* The proper stub has already been created. */ 3046 free (stub_name); 3047 continue; 3048 } 3049 3050 hsh = hppa_add_stub (stub_name, section, htab); 3051 if (hsh == NULL) 3052 { 3053 free (stub_name); 3054 goto error_ret_free_internal; 3055 } 3056 3057 hsh->target_value = sym_value; 3058 hsh->target_section = sym_sec; 3059 hsh->stub_type = stub_type; 3060 if (bfd_link_pic (info)) 3061 { 3062 if (stub_type == hppa_stub_import) 3063 hsh->stub_type = hppa_stub_import_shared; 3064 else if (stub_type == hppa_stub_long_branch) 3065 hsh->stub_type = hppa_stub_long_branch_shared; 3066 } 3067 hsh->hh = hh; 3068 stub_changed = TRUE; 3069 } 3070 3071 /* We're done with the internal relocs, free them. */ 3072 if (elf_section_data (section)->relocs == NULL) 3073 free (internal_relocs); 3074 } 3075 } 3076 3077 if (!stub_changed) 3078 break; 3079 3080 /* OK, we've added some stubs. Find out the new size of the 3081 stub sections. */ 3082 for (stub_sec = htab->stub_bfd->sections; 3083 stub_sec != NULL; 3084 stub_sec = stub_sec->next) 3085 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) 3086 stub_sec->size = 0; 3087 3088 bfd_hash_traverse (&htab->bstab, hppa_size_one_stub, htab); 3089 3090 /* Ask the linker to do its stuff. */ 3091 (*htab->layout_sections_again) (); 3092 stub_changed = FALSE; 3093 } 3094 3095 free (htab->all_local_syms); 3096 return TRUE; 3097 3098 error_ret_free_local: 3099 free (htab->all_local_syms); 3100 return FALSE; 3101 } 3102 3103 /* For a final link, this function is called after we have sized the 3104 stubs to provide a value for __gp. */ 3105 3106 bfd_boolean 3107 elf32_hppa_set_gp (bfd *abfd, struct bfd_link_info *info) 3108 { 3109 struct bfd_link_hash_entry *h; 3110 asection *sec = NULL; 3111 bfd_vma gp_val = 0; 3112 struct elf32_hppa_link_hash_table *htab; 3113 3114 htab = hppa_link_hash_table (info); 3115 if (htab == NULL) 3116 return FALSE; 3117 3118 h = bfd_link_hash_lookup (&htab->etab.root, "$global$", FALSE, FALSE, FALSE); 3119 3120 if (h != NULL 3121 && (h->type == bfd_link_hash_defined 3122 || h->type == bfd_link_hash_defweak)) 3123 { 3124 gp_val = h->u.def.value; 3125 sec = h->u.def.section; 3126 } 3127 else 3128 { 3129 asection *splt = bfd_get_section_by_name (abfd, ".plt"); 3130 asection *sgot = bfd_get_section_by_name (abfd, ".got"); 3131 3132 /* Choose to point our LTP at, in this order, one of .plt, .got, 3133 or .data, if these sections exist. In the case of choosing 3134 .plt try to make the LTP ideal for addressing anywhere in the 3135 .plt or .got with a 14 bit signed offset. Typically, the end 3136 of the .plt is the start of the .got, so choose .plt + 0x2000 3137 if either the .plt or .got is larger than 0x2000. If both 3138 the .plt and .got are smaller than 0x2000, choose the end of 3139 the .plt section. */ 3140 sec = strcmp (bfd_get_target (abfd), "elf32-hppa-netbsd") == 0 3141 ? NULL : splt; 3142 if (sec != NULL) 3143 { 3144 gp_val = sec->size; 3145 if (gp_val > 0x2000 || (sgot && sgot->size > 0x2000)) 3146 { 3147 gp_val = 0x2000; 3148 } 3149 } 3150 else 3151 { 3152 sec = sgot; 3153 if (sec != NULL) 3154 { 3155 if (strcmp (bfd_get_target (abfd), "elf32-hppa-netbsd") != 0) 3156 { 3157 /* We know we don't have a .plt. If .got is large, 3158 offset our LTP. */ 3159 if (sec->size > 0x2000) 3160 gp_val = 0x2000; 3161 } 3162 } 3163 else 3164 { 3165 /* No .plt or .got. Who cares what the LTP is? */ 3166 sec = bfd_get_section_by_name (abfd, ".data"); 3167 } 3168 } 3169 3170 if (h != NULL) 3171 { 3172 h->type = bfd_link_hash_defined; 3173 h->u.def.value = gp_val; 3174 if (sec != NULL) 3175 h->u.def.section = sec; 3176 else 3177 h->u.def.section = bfd_abs_section_ptr; 3178 } 3179 } 3180 3181 if (sec != NULL && sec->output_section != NULL) 3182 gp_val += sec->output_section->vma + sec->output_offset; 3183 3184 elf_gp (abfd) = gp_val; 3185 return TRUE; 3186 } 3187 3188 /* Build all the stubs associated with the current output file. The 3189 stubs are kept in a hash table attached to the main linker hash 3190 table. We also set up the .plt entries for statically linked PIC 3191 functions here. This function is called via hppaelf_finish in the 3192 linker. */ 3193 3194 bfd_boolean 3195 elf32_hppa_build_stubs (struct bfd_link_info *info) 3196 { 3197 asection *stub_sec; 3198 struct bfd_hash_table *table; 3199 struct elf32_hppa_link_hash_table *htab; 3200 3201 htab = hppa_link_hash_table (info); 3202 if (htab == NULL) 3203 return FALSE; 3204 3205 for (stub_sec = htab->stub_bfd->sections; 3206 stub_sec != NULL; 3207 stub_sec = stub_sec->next) 3208 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0 3209 && stub_sec->size != 0) 3210 { 3211 /* Allocate memory to hold the linker stubs. */ 3212 stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size); 3213 if (stub_sec->contents == NULL) 3214 return FALSE; 3215 stub_sec->size = 0; 3216 } 3217 3218 /* Build the stubs as directed by the stub hash table. */ 3219 table = &htab->bstab; 3220 bfd_hash_traverse (table, hppa_build_one_stub, info); 3221 3222 return TRUE; 3223 } 3224 3225 /* Return the base vma address which should be subtracted from the real 3226 address when resolving a dtpoff relocation. 3227 This is PT_TLS segment p_vaddr. */ 3228 3229 static bfd_vma 3230 dtpoff_base (struct bfd_link_info *info) 3231 { 3232 /* If tls_sec is NULL, we should have signalled an error already. */ 3233 if (elf_hash_table (info)->tls_sec == NULL) 3234 return 0; 3235 return elf_hash_table (info)->tls_sec->vma; 3236 } 3237 3238 /* Return the relocation value for R_PARISC_TLS_TPOFF*.. */ 3239 3240 static bfd_vma 3241 tpoff (struct bfd_link_info *info, bfd_vma address) 3242 { 3243 struct elf_link_hash_table *htab = elf_hash_table (info); 3244 3245 /* If tls_sec is NULL, we should have signalled an error already. */ 3246 if (htab->tls_sec == NULL) 3247 return 0; 3248 /* hppa TLS ABI is variant I and static TLS block start just after 3249 tcbhead structure which has 2 pointer fields. */ 3250 return (address - htab->tls_sec->vma 3251 + align_power ((bfd_vma) 8, htab->tls_sec->alignment_power)); 3252 } 3253 3254 /* Perform a final link. */ 3255 3256 static bfd_boolean 3257 elf32_hppa_final_link (bfd *abfd, struct bfd_link_info *info) 3258 { 3259 struct stat buf; 3260 3261 /* Invoke the regular ELF linker to do all the work. */ 3262 if (!bfd_elf_final_link (abfd, info)) 3263 return FALSE; 3264 3265 /* If we're producing a final executable, sort the contents of the 3266 unwind section. */ 3267 if (bfd_link_relocatable (info)) 3268 return TRUE; 3269 3270 /* Do not attempt to sort non-regular files. This is here 3271 especially for configure scripts and kernel builds which run 3272 tests with "ld [...] -o /dev/null". */ 3273 if (stat (abfd->filename, &buf) != 0 3274 || !S_ISREG(buf.st_mode)) 3275 return TRUE; 3276 3277 return elf_hppa_sort_unwind (abfd); 3278 } 3279 3280 /* Record the lowest address for the data and text segments. */ 3281 3282 static void 3283 hppa_record_segment_addr (bfd *abfd, asection *section, void *data) 3284 { 3285 struct elf32_hppa_link_hash_table *htab; 3286 3287 htab = (struct elf32_hppa_link_hash_table*) data; 3288 if (htab == NULL) 3289 return; 3290 3291 if ((section->flags & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) 3292 { 3293 bfd_vma value; 3294 Elf_Internal_Phdr *p; 3295 3296 p = _bfd_elf_find_segment_containing_section (abfd, section->output_section); 3297 BFD_ASSERT (p != NULL); 3298 value = p->p_vaddr; 3299 3300 if ((section->flags & SEC_READONLY) != 0) 3301 { 3302 if (value < htab->text_segment_base) 3303 htab->text_segment_base = value; 3304 } 3305 else 3306 { 3307 if (value < htab->data_segment_base) 3308 htab->data_segment_base = value; 3309 } 3310 } 3311 } 3312 3313 /* Perform a relocation as part of a final link. */ 3314 3315 static bfd_reloc_status_type 3316 final_link_relocate (asection *input_section, 3317 bfd_byte *contents, 3318 const Elf_Internal_Rela *rela, 3319 bfd_vma value, 3320 struct elf32_hppa_link_hash_table *htab, 3321 asection *sym_sec, 3322 struct elf32_hppa_link_hash_entry *hh, 3323 struct bfd_link_info *info) 3324 { 3325 int insn; 3326 unsigned int r_type = ELF32_R_TYPE (rela->r_info); 3327 unsigned int orig_r_type = r_type; 3328 reloc_howto_type *howto = elf_hppa_howto_table + r_type; 3329 int r_format = howto->bitsize; 3330 enum hppa_reloc_field_selector_type_alt r_field; 3331 bfd *input_bfd = input_section->owner; 3332 bfd_vma offset = rela->r_offset; 3333 bfd_vma max_branch_offset = 0; 3334 bfd_byte *hit_data = contents + offset; 3335 bfd_signed_vma addend = rela->r_addend; 3336 bfd_vma location; 3337 struct elf32_hppa_stub_hash_entry *hsh = NULL; 3338 int val; 3339 3340 if (r_type == R_PARISC_NONE) 3341 return bfd_reloc_ok; 3342 3343 insn = bfd_get_32 (input_bfd, hit_data); 3344 3345 /* Find out where we are and where we're going. */ 3346 location = (offset + 3347 input_section->output_offset + 3348 input_section->output_section->vma); 3349 3350 /* If we are not building a shared library, convert DLTIND relocs to 3351 DPREL relocs. */ 3352 if (!bfd_link_pic (info)) 3353 { 3354 switch (r_type) 3355 { 3356 case R_PARISC_DLTIND21L: 3357 case R_PARISC_TLS_GD21L: 3358 case R_PARISC_TLS_LDM21L: 3359 case R_PARISC_TLS_IE21L: 3360 r_type = R_PARISC_DPREL21L; 3361 break; 3362 3363 case R_PARISC_DLTIND14R: 3364 case R_PARISC_TLS_GD14R: 3365 case R_PARISC_TLS_LDM14R: 3366 case R_PARISC_TLS_IE14R: 3367 r_type = R_PARISC_DPREL14R; 3368 break; 3369 3370 case R_PARISC_DLTIND14F: 3371 r_type = R_PARISC_DPREL14F; 3372 break; 3373 } 3374 } 3375 3376 switch (r_type) 3377 { 3378 case R_PARISC_PCREL12F: 3379 case R_PARISC_PCREL17F: 3380 case R_PARISC_PCREL22F: 3381 /* If this call should go via the plt, find the import stub in 3382 the stub hash. */ 3383 if (sym_sec == NULL 3384 || sym_sec->output_section == NULL 3385 || (hh != NULL 3386 && hh->eh.plt.offset != (bfd_vma) -1 3387 && hh->eh.dynindx != -1 3388 && !hh->plabel 3389 && (bfd_link_pic (info) 3390 || !hh->eh.def_regular 3391 || hh->eh.root.type == bfd_link_hash_defweak))) 3392 { 3393 hsh = hppa_get_stub_entry (input_section, sym_sec, 3394 hh, rela, htab); 3395 if (hsh != NULL) 3396 { 3397 value = (hsh->stub_offset 3398 + hsh->stub_sec->output_offset 3399 + hsh->stub_sec->output_section->vma); 3400 addend = 0; 3401 } 3402 else if (sym_sec == NULL && hh != NULL 3403 && hh->eh.root.type == bfd_link_hash_undefweak) 3404 { 3405 /* It's OK if undefined weak. Calls to undefined weak 3406 symbols behave as if the "called" function 3407 immediately returns. We can thus call to a weak 3408 function without first checking whether the function 3409 is defined. */ 3410 value = location; 3411 addend = 8; 3412 } 3413 else 3414 return bfd_reloc_undefined; 3415 } 3416 /* Fall thru. */ 3417 3418 case R_PARISC_PCREL21L: 3419 case R_PARISC_PCREL17C: 3420 case R_PARISC_PCREL17R: 3421 case R_PARISC_PCREL14R: 3422 case R_PARISC_PCREL14F: 3423 case R_PARISC_PCREL32: 3424 /* Make it a pc relative offset. */ 3425 value -= location; 3426 addend -= 8; 3427 break; 3428 3429 case R_PARISC_DPREL21L: 3430 case R_PARISC_DPREL14R: 3431 case R_PARISC_DPREL14F: 3432 /* Convert instructions that use the linkage table pointer (r19) to 3433 instructions that use the global data pointer (dp). This is the 3434 most efficient way of using PIC code in an incomplete executable, 3435 but the user must follow the standard runtime conventions for 3436 accessing data for this to work. */ 3437 if (orig_r_type != r_type) 3438 { 3439 if (r_type == R_PARISC_DPREL21L) 3440 { 3441 /* GCC sometimes uses a register other than r19 for the 3442 operation, so we must convert any addil instruction 3443 that uses this relocation. */ 3444 if ((insn & 0xfc000000) == ((int) OP_ADDIL << 26)) 3445 insn = ADDIL_DP; 3446 else 3447 /* We must have a ldil instruction. It's too hard to find 3448 and convert the associated add instruction, so issue an 3449 error. */ 3450 (*_bfd_error_handler) 3451 (_("%B(%A+0x%lx): %s fixup for insn 0x%x is not supported in a non-shared link"), 3452 input_bfd, 3453 input_section, 3454 (long) offset, 3455 howto->name, 3456 insn); 3457 } 3458 else if (r_type == R_PARISC_DPREL14F) 3459 { 3460 /* This must be a format 1 load/store. Change the base 3461 register to dp. */ 3462 insn = (insn & 0xfc1ffff) | (27 << 21); 3463 } 3464 } 3465 3466 /* For all the DP relative relocations, we need to examine the symbol's 3467 section. If it has no section or if it's a code section, then 3468 "data pointer relative" makes no sense. In that case we don't 3469 adjust the "value", and for 21 bit addil instructions, we change the 3470 source addend register from %dp to %r0. This situation commonly 3471 arises for undefined weak symbols and when a variable's "constness" 3472 is declared differently from the way the variable is defined. For 3473 instance: "extern int foo" with foo defined as "const int foo". */ 3474 if (sym_sec == NULL || (sym_sec->flags & SEC_CODE) != 0) 3475 { 3476 if ((insn & ((0x3f << 26) | (0x1f << 21))) 3477 == (((int) OP_ADDIL << 26) | (27 << 21))) 3478 { 3479 insn &= ~ (0x1f << 21); 3480 } 3481 /* Now try to make things easy for the dynamic linker. */ 3482 3483 break; 3484 } 3485 /* Fall thru. */ 3486 3487 case R_PARISC_DLTIND21L: 3488 case R_PARISC_DLTIND14R: 3489 case R_PARISC_DLTIND14F: 3490 case R_PARISC_TLS_GD21L: 3491 case R_PARISC_TLS_LDM21L: 3492 case R_PARISC_TLS_IE21L: 3493 case R_PARISC_TLS_GD14R: 3494 case R_PARISC_TLS_LDM14R: 3495 case R_PARISC_TLS_IE14R: 3496 value -= elf_gp (input_section->output_section->owner); 3497 break; 3498 3499 case R_PARISC_SEGREL32: 3500 if ((sym_sec->flags & SEC_CODE) != 0) 3501 value -= htab->text_segment_base; 3502 else 3503 value -= htab->data_segment_base; 3504 break; 3505 3506 default: 3507 break; 3508 } 3509 3510 switch (r_type) 3511 { 3512 case R_PARISC_DIR32: 3513 case R_PARISC_DIR14F: 3514 case R_PARISC_DIR17F: 3515 case R_PARISC_PCREL17C: 3516 case R_PARISC_PCREL14F: 3517 case R_PARISC_PCREL32: 3518 case R_PARISC_DPREL14F: 3519 case R_PARISC_PLABEL32: 3520 case R_PARISC_DLTIND14F: 3521 case R_PARISC_SEGBASE: 3522 case R_PARISC_SEGREL32: 3523 case R_PARISC_TLS_DTPMOD32: 3524 case R_PARISC_TLS_DTPOFF32: 3525 case R_PARISC_TLS_TPREL32: 3526 r_field = e_fsel; 3527 break; 3528 3529 case R_PARISC_DLTIND21L: 3530 case R_PARISC_PCREL21L: 3531 case R_PARISC_PLABEL21L: 3532 r_field = e_lsel; 3533 break; 3534 3535 case R_PARISC_DIR21L: 3536 case R_PARISC_DPREL21L: 3537 case R_PARISC_TLS_GD21L: 3538 case R_PARISC_TLS_LDM21L: 3539 case R_PARISC_TLS_LDO21L: 3540 case R_PARISC_TLS_IE21L: 3541 case R_PARISC_TLS_LE21L: 3542 r_field = e_lrsel; 3543 break; 3544 3545 case R_PARISC_PCREL17R: 3546 case R_PARISC_PCREL14R: 3547 case R_PARISC_PLABEL14R: 3548 case R_PARISC_DLTIND14R: 3549 r_field = e_rsel; 3550 break; 3551 3552 case R_PARISC_DIR17R: 3553 case R_PARISC_DIR14R: 3554 case R_PARISC_DPREL14R: 3555 case R_PARISC_TLS_GD14R: 3556 case R_PARISC_TLS_LDM14R: 3557 case R_PARISC_TLS_LDO14R: 3558 case R_PARISC_TLS_IE14R: 3559 case R_PARISC_TLS_LE14R: 3560 r_field = e_rrsel; 3561 break; 3562 3563 case R_PARISC_PCREL12F: 3564 case R_PARISC_PCREL17F: 3565 case R_PARISC_PCREL22F: 3566 r_field = e_fsel; 3567 3568 if (r_type == (unsigned int) R_PARISC_PCREL17F) 3569 { 3570 max_branch_offset = (1 << (17-1)) << 2; 3571 } 3572 else if (r_type == (unsigned int) R_PARISC_PCREL12F) 3573 { 3574 max_branch_offset = (1 << (12-1)) << 2; 3575 } 3576 else 3577 { 3578 max_branch_offset = (1 << (22-1)) << 2; 3579 } 3580 3581 /* sym_sec is NULL on undefined weak syms or when shared on 3582 undefined syms. We've already checked for a stub for the 3583 shared undefined case. */ 3584 if (sym_sec == NULL) 3585 break; 3586 3587 /* If the branch is out of reach, then redirect the 3588 call to the local stub for this function. */ 3589 if (value + addend + max_branch_offset >= 2*max_branch_offset) 3590 { 3591 hsh = hppa_get_stub_entry (input_section, sym_sec, 3592 hh, rela, htab); 3593 if (hsh == NULL) 3594 return bfd_reloc_undefined; 3595 3596 /* Munge up the value and addend so that we call the stub 3597 rather than the procedure directly. */ 3598 value = (hsh->stub_offset 3599 + hsh->stub_sec->output_offset 3600 + hsh->stub_sec->output_section->vma 3601 - location); 3602 addend = -8; 3603 } 3604 break; 3605 3606 /* Something we don't know how to handle. */ 3607 default: 3608 return bfd_reloc_notsupported; 3609 } 3610 3611 /* Make sure we can reach the stub. */ 3612 if (max_branch_offset != 0 3613 && value + addend + max_branch_offset >= 2*max_branch_offset) 3614 { 3615 (*_bfd_error_handler) 3616 (_("%B(%A+0x%lx): cannot reach %s, recompile with -ffunction-sections"), 3617 input_bfd, 3618 input_section, 3619 (long) offset, 3620 hsh->bh_root.string); 3621 bfd_set_error (bfd_error_bad_value); 3622 return bfd_reloc_notsupported; 3623 } 3624 3625 val = hppa_field_adjust (value, addend, r_field); 3626 3627 switch (r_type) 3628 { 3629 case R_PARISC_PCREL12F: 3630 case R_PARISC_PCREL17C: 3631 case R_PARISC_PCREL17F: 3632 case R_PARISC_PCREL17R: 3633 case R_PARISC_PCREL22F: 3634 case R_PARISC_DIR17F: 3635 case R_PARISC_DIR17R: 3636 /* This is a branch. Divide the offset by four. 3637 Note that we need to decide whether it's a branch or 3638 otherwise by inspecting the reloc. Inspecting insn won't 3639 work as insn might be from a .word directive. */ 3640 val >>= 2; 3641 break; 3642 3643 default: 3644 break; 3645 } 3646 3647 insn = hppa_rebuild_insn (insn, val, r_format); 3648 3649 /* Update the instruction word. */ 3650 bfd_put_32 (input_bfd, (bfd_vma) insn, hit_data); 3651 return bfd_reloc_ok; 3652 } 3653 3654 /* Relocate an HPPA ELF section. */ 3655 3656 static bfd_boolean 3657 elf32_hppa_relocate_section (bfd *output_bfd, 3658 struct bfd_link_info *info, 3659 bfd *input_bfd, 3660 asection *input_section, 3661 bfd_byte *contents, 3662 Elf_Internal_Rela *relocs, 3663 Elf_Internal_Sym *local_syms, 3664 asection **local_sections) 3665 { 3666 bfd_vma *local_got_offsets; 3667 struct elf32_hppa_link_hash_table *htab; 3668 Elf_Internal_Shdr *symtab_hdr; 3669 Elf_Internal_Rela *rela; 3670 Elf_Internal_Rela *relend; 3671 3672 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 3673 3674 htab = hppa_link_hash_table (info); 3675 if (htab == NULL) 3676 return FALSE; 3677 3678 local_got_offsets = elf_local_got_offsets (input_bfd); 3679 3680 rela = relocs; 3681 relend = relocs + input_section->reloc_count; 3682 for (; rela < relend; rela++) 3683 { 3684 unsigned int r_type; 3685 reloc_howto_type *howto; 3686 unsigned int r_symndx; 3687 struct elf32_hppa_link_hash_entry *hh; 3688 Elf_Internal_Sym *sym; 3689 asection *sym_sec; 3690 bfd_vma relocation; 3691 bfd_reloc_status_type rstatus; 3692 const char *sym_name; 3693 bfd_boolean plabel; 3694 bfd_boolean warned_undef; 3695 3696 r_type = ELF32_R_TYPE (rela->r_info); 3697 if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED) 3698 { 3699 bfd_set_error (bfd_error_bad_value); 3700 return FALSE; 3701 } 3702 if (r_type == (unsigned int) R_PARISC_GNU_VTENTRY 3703 || r_type == (unsigned int) R_PARISC_GNU_VTINHERIT) 3704 continue; 3705 3706 r_symndx = ELF32_R_SYM (rela->r_info); 3707 hh = NULL; 3708 sym = NULL; 3709 sym_sec = NULL; 3710 warned_undef = FALSE; 3711 if (r_symndx < symtab_hdr->sh_info) 3712 { 3713 /* This is a local symbol, h defaults to NULL. */ 3714 sym = local_syms + r_symndx; 3715 sym_sec = local_sections[r_symndx]; 3716 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sym_sec, rela); 3717 } 3718 else 3719 { 3720 struct elf_link_hash_entry *eh; 3721 bfd_boolean unresolved_reloc, ignored; 3722 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); 3723 3724 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rela, 3725 r_symndx, symtab_hdr, sym_hashes, 3726 eh, sym_sec, relocation, 3727 unresolved_reloc, warned_undef, 3728 ignored); 3729 3730 if (!bfd_link_relocatable (info) 3731 && relocation == 0 3732 && eh->root.type != bfd_link_hash_defined 3733 && eh->root.type != bfd_link_hash_defweak 3734 && eh->root.type != bfd_link_hash_undefweak) 3735 { 3736 if (info->unresolved_syms_in_objects == RM_IGNORE 3737 && ELF_ST_VISIBILITY (eh->other) == STV_DEFAULT 3738 && eh->type == STT_PARISC_MILLI) 3739 { 3740 (*info->callbacks->undefined_symbol) 3741 (info, eh_name (eh), input_bfd, 3742 input_section, rela->r_offset, FALSE); 3743 warned_undef = TRUE; 3744 } 3745 } 3746 hh = hppa_elf_hash_entry (eh); 3747 } 3748 3749 if (sym_sec != NULL && discarded_section (sym_sec)) 3750 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 3751 rela, 1, relend, 3752 elf_hppa_howto_table + r_type, 0, 3753 contents); 3754 3755 if (bfd_link_relocatable (info)) 3756 continue; 3757 3758 /* Do any required modifications to the relocation value, and 3759 determine what types of dynamic info we need to output, if 3760 any. */ 3761 plabel = 0; 3762 switch (r_type) 3763 { 3764 case R_PARISC_DLTIND14F: 3765 case R_PARISC_DLTIND14R: 3766 case R_PARISC_DLTIND21L: 3767 { 3768 bfd_vma off; 3769 bfd_boolean do_got = 0; 3770 3771 /* Relocation is to the entry for this symbol in the 3772 global offset table. */ 3773 if (hh != NULL) 3774 { 3775 bfd_boolean dyn; 3776 3777 off = hh->eh.got.offset; 3778 dyn = htab->etab.dynamic_sections_created; 3779 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 3780 bfd_link_pic (info), 3781 &hh->eh)) 3782 { 3783 /* If we aren't going to call finish_dynamic_symbol, 3784 then we need to handle initialisation of the .got 3785 entry and create needed relocs here. Since the 3786 offset must always be a multiple of 4, we use the 3787 least significant bit to record whether we have 3788 initialised it already. */ 3789 if ((off & 1) != 0) 3790 off &= ~1; 3791 else 3792 { 3793 hh->eh.got.offset |= 1; 3794 do_got = 1; 3795 } 3796 } 3797 } 3798 else 3799 { 3800 /* Local symbol case. */ 3801 if (local_got_offsets == NULL) 3802 abort (); 3803 3804 off = local_got_offsets[r_symndx]; 3805 3806 /* The offset must always be a multiple of 4. We use 3807 the least significant bit to record whether we have 3808 already generated the necessary reloc. */ 3809 if ((off & 1) != 0) 3810 off &= ~1; 3811 else 3812 { 3813 local_got_offsets[r_symndx] |= 1; 3814 do_got = 1; 3815 } 3816 } 3817 3818 if (do_got) 3819 { 3820 if (bfd_link_pic (info)) 3821 { 3822 /* Output a dynamic relocation for this GOT entry. 3823 In this case it is relative to the base of the 3824 object because the symbol index is zero. */ 3825 Elf_Internal_Rela outrel; 3826 bfd_byte *loc; 3827 asection *sec = htab->srelgot; 3828 3829 outrel.r_offset = (off 3830 + htab->sgot->output_offset 3831 + htab->sgot->output_section->vma); 3832 outrel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32); 3833 outrel.r_addend = relocation; 3834 loc = sec->contents; 3835 loc += sec->reloc_count++ * sizeof (Elf32_External_Rela); 3836 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 3837 } 3838 else 3839 bfd_put_32 (output_bfd, relocation, 3840 htab->sgot->contents + off); 3841 } 3842 3843 if (off >= (bfd_vma) -2) 3844 abort (); 3845 3846 /* Add the base of the GOT to the relocation value. */ 3847 relocation = (off 3848 + htab->sgot->output_offset 3849 + htab->sgot->output_section->vma); 3850 } 3851 break; 3852 3853 case R_PARISC_SEGREL32: 3854 /* If this is the first SEGREL relocation, then initialize 3855 the segment base values. */ 3856 if (htab->text_segment_base == (bfd_vma) -1) 3857 bfd_map_over_sections (output_bfd, hppa_record_segment_addr, htab); 3858 break; 3859 3860 case R_PARISC_PLABEL14R: 3861 case R_PARISC_PLABEL21L: 3862 case R_PARISC_PLABEL32: 3863 if (htab->etab.dynamic_sections_created) 3864 { 3865 bfd_vma off; 3866 bfd_boolean do_plt = 0; 3867 /* If we have a global symbol with a PLT slot, then 3868 redirect this relocation to it. */ 3869 if (hh != NULL) 3870 { 3871 off = hh->eh.plt.offset; 3872 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 3873 bfd_link_pic (info), 3874 &hh->eh)) 3875 { 3876 /* In a non-shared link, adjust_dynamic_symbols 3877 isn't called for symbols forced local. We 3878 need to write out the plt entry here. */ 3879 if ((off & 1) != 0) 3880 off &= ~1; 3881 else 3882 { 3883 hh->eh.plt.offset |= 1; 3884 do_plt = 1; 3885 } 3886 } 3887 } 3888 else 3889 { 3890 bfd_vma *local_plt_offsets; 3891 3892 if (local_got_offsets == NULL) 3893 abort (); 3894 3895 local_plt_offsets = local_got_offsets + symtab_hdr->sh_info; 3896 off = local_plt_offsets[r_symndx]; 3897 3898 /* As for the local .got entry case, we use the last 3899 bit to record whether we've already initialised 3900 this local .plt entry. */ 3901 if ((off & 1) != 0) 3902 off &= ~1; 3903 else 3904 { 3905 local_plt_offsets[r_symndx] |= 1; 3906 do_plt = 1; 3907 } 3908 } 3909 3910 if (do_plt) 3911 { 3912 if (bfd_link_pic (info)) 3913 { 3914 /* Output a dynamic IPLT relocation for this 3915 PLT entry. */ 3916 Elf_Internal_Rela outrel; 3917 bfd_byte *loc; 3918 asection *s = htab->srelplt; 3919 3920 outrel.r_offset = (off 3921 + htab->splt->output_offset 3922 + htab->splt->output_section->vma); 3923 outrel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT); 3924 outrel.r_addend = relocation; 3925 loc = s->contents; 3926 loc += s->reloc_count++ * sizeof (Elf32_External_Rela); 3927 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 3928 } 3929 else 3930 { 3931 bfd_put_32 (output_bfd, 3932 relocation, 3933 htab->splt->contents + off); 3934 bfd_put_32 (output_bfd, 3935 elf_gp (htab->splt->output_section->owner), 3936 htab->splt->contents + off + 4); 3937 } 3938 } 3939 3940 if (off >= (bfd_vma) -2) 3941 abort (); 3942 3943 /* PLABELs contain function pointers. Relocation is to 3944 the entry for the function in the .plt. The magic +2 3945 offset signals to $$dyncall that the function pointer 3946 is in the .plt and thus has a gp pointer too. 3947 Exception: Undefined PLABELs should have a value of 3948 zero. */ 3949 if (hh == NULL 3950 || (hh->eh.root.type != bfd_link_hash_undefweak 3951 && hh->eh.root.type != bfd_link_hash_undefined)) 3952 { 3953 relocation = (off 3954 + htab->splt->output_offset 3955 + htab->splt->output_section->vma 3956 + 2); 3957 } 3958 plabel = 1; 3959 } 3960 /* Fall through and possibly emit a dynamic relocation. */ 3961 3962 case R_PARISC_DIR17F: 3963 case R_PARISC_DIR17R: 3964 case R_PARISC_DIR14F: 3965 case R_PARISC_DIR14R: 3966 case R_PARISC_DIR21L: 3967 case R_PARISC_DPREL14F: 3968 case R_PARISC_DPREL14R: 3969 case R_PARISC_DPREL21L: 3970 case R_PARISC_DIR32: 3971 if ((input_section->flags & SEC_ALLOC) == 0) 3972 break; 3973 3974 /* The reloc types handled here and this conditional 3975 expression must match the code in ..check_relocs and 3976 allocate_dynrelocs. ie. We need exactly the same condition 3977 as in ..check_relocs, with some extra conditions (dynindx 3978 test in this case) to cater for relocs removed by 3979 allocate_dynrelocs. If you squint, the non-shared test 3980 here does indeed match the one in ..check_relocs, the 3981 difference being that here we test DEF_DYNAMIC as well as 3982 !DEF_REGULAR. All common syms end up with !DEF_REGULAR, 3983 which is why we can't use just that test here. 3984 Conversely, DEF_DYNAMIC can't be used in check_relocs as 3985 there all files have not been loaded. */ 3986 if ((bfd_link_pic (info) 3987 && (hh == NULL 3988 || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT 3989 || hh->eh.root.type != bfd_link_hash_undefweak) 3990 && (IS_ABSOLUTE_RELOC (r_type) 3991 || !SYMBOL_CALLS_LOCAL (info, &hh->eh))) 3992 || (!bfd_link_pic (info) 3993 && hh != NULL 3994 && hh->eh.dynindx != -1 3995 && !hh->eh.non_got_ref 3996 && ((ELIMINATE_COPY_RELOCS 3997 && hh->eh.def_dynamic 3998 && !hh->eh.def_regular) 3999 || hh->eh.root.type == bfd_link_hash_undefweak 4000 || hh->eh.root.type == bfd_link_hash_undefined))) 4001 { 4002 Elf_Internal_Rela outrel; 4003 bfd_boolean skip; 4004 asection *sreloc; 4005 bfd_byte *loc; 4006 4007 /* When generating a shared object, these relocations 4008 are copied into the output file to be resolved at run 4009 time. */ 4010 4011 outrel.r_addend = rela->r_addend; 4012 outrel.r_offset = 4013 _bfd_elf_section_offset (output_bfd, info, input_section, 4014 rela->r_offset); 4015 skip = (outrel.r_offset == (bfd_vma) -1 4016 || outrel.r_offset == (bfd_vma) -2); 4017 outrel.r_offset += (input_section->output_offset 4018 + input_section->output_section->vma); 4019 4020 if (skip) 4021 { 4022 memset (&outrel, 0, sizeof (outrel)); 4023 } 4024 else if (hh != NULL 4025 && hh->eh.dynindx != -1 4026 && (plabel 4027 || !IS_ABSOLUTE_RELOC (r_type) 4028 || !bfd_link_pic (info) 4029 || !SYMBOLIC_BIND (info, &hh->eh) 4030 || !hh->eh.def_regular)) 4031 { 4032 outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type); 4033 } 4034 else /* It's a local symbol, or one marked to become local. */ 4035 { 4036 int indx = 0; 4037 4038 /* Add the absolute offset of the symbol. */ 4039 outrel.r_addend += relocation; 4040 4041 /* Global plabels need to be processed by the 4042 dynamic linker so that functions have at most one 4043 fptr. For this reason, we need to differentiate 4044 between global and local plabels, which we do by 4045 providing the function symbol for a global plabel 4046 reloc, and no symbol for local plabels. */ 4047 if (! plabel 4048 && sym_sec != NULL 4049 && sym_sec->output_section != NULL 4050 && ! bfd_is_abs_section (sym_sec)) 4051 { 4052 asection *osec; 4053 4054 osec = sym_sec->output_section; 4055 indx = elf_section_data (osec)->dynindx; 4056 if (indx == 0) 4057 { 4058 osec = htab->etab.text_index_section; 4059 indx = elf_section_data (osec)->dynindx; 4060 } 4061 BFD_ASSERT (indx != 0); 4062 4063 /* We are turning this relocation into one 4064 against a section symbol, so subtract out the 4065 output section's address but not the offset 4066 of the input section in the output section. */ 4067 outrel.r_addend -= osec->vma; 4068 } 4069 4070 outrel.r_info = ELF32_R_INFO (indx, r_type); 4071 } 4072 sreloc = elf_section_data (input_section)->sreloc; 4073 if (sreloc == NULL) 4074 abort (); 4075 4076 loc = sreloc->contents; 4077 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 4078 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 4079 } 4080 break; 4081 4082 case R_PARISC_TLS_LDM21L: 4083 case R_PARISC_TLS_LDM14R: 4084 { 4085 bfd_vma off; 4086 4087 off = htab->tls_ldm_got.offset; 4088 if (off & 1) 4089 off &= ~1; 4090 else 4091 { 4092 Elf_Internal_Rela outrel; 4093 bfd_byte *loc; 4094 4095 outrel.r_offset = (off 4096 + htab->sgot->output_section->vma 4097 + htab->sgot->output_offset); 4098 outrel.r_addend = 0; 4099 outrel.r_info = ELF32_R_INFO (0, R_PARISC_TLS_DTPMOD32); 4100 loc = htab->srelgot->contents; 4101 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 4102 4103 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 4104 htab->tls_ldm_got.offset |= 1; 4105 } 4106 4107 /* Add the base of the GOT to the relocation value. */ 4108 relocation = (off 4109 + htab->sgot->output_offset 4110 + htab->sgot->output_section->vma); 4111 4112 break; 4113 } 4114 4115 case R_PARISC_TLS_LDO21L: 4116 case R_PARISC_TLS_LDO14R: 4117 relocation -= dtpoff_base (info); 4118 break; 4119 4120 case R_PARISC_TLS_GD21L: 4121 case R_PARISC_TLS_GD14R: 4122 case R_PARISC_TLS_IE21L: 4123 case R_PARISC_TLS_IE14R: 4124 { 4125 bfd_vma off; 4126 int indx; 4127 char tls_type; 4128 4129 indx = 0; 4130 if (hh != NULL) 4131 { 4132 bfd_boolean dyn; 4133 dyn = htab->etab.dynamic_sections_created; 4134 4135 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 4136 bfd_link_pic (info), 4137 &hh->eh) 4138 && (!bfd_link_pic (info) 4139 || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh))) 4140 { 4141 indx = hh->eh.dynindx; 4142 } 4143 off = hh->eh.got.offset; 4144 tls_type = hh->tls_type; 4145 } 4146 else 4147 { 4148 off = local_got_offsets[r_symndx]; 4149 tls_type = hppa_elf_local_got_tls_type (input_bfd)[r_symndx]; 4150 } 4151 4152 if (tls_type == GOT_UNKNOWN) 4153 abort (); 4154 4155 if ((off & 1) != 0) 4156 off &= ~1; 4157 else 4158 { 4159 bfd_boolean need_relocs = FALSE; 4160 Elf_Internal_Rela outrel; 4161 bfd_byte *loc = NULL; 4162 int cur_off = off; 4163 4164 /* The GOT entries have not been initialized yet. Do it 4165 now, and emit any relocations. If both an IE GOT and a 4166 GD GOT are necessary, we emit the GD first. */ 4167 4168 if ((bfd_link_pic (info) || indx != 0) 4169 && (hh == NULL 4170 || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT 4171 || hh->eh.root.type != bfd_link_hash_undefweak)) 4172 { 4173 need_relocs = TRUE; 4174 loc = htab->srelgot->contents; 4175 /* FIXME (CAO): Should this be reloc_count++ ? */ 4176 loc += htab->srelgot->reloc_count * sizeof (Elf32_External_Rela); 4177 } 4178 4179 if (tls_type & GOT_TLS_GD) 4180 { 4181 if (need_relocs) 4182 { 4183 outrel.r_offset = (cur_off 4184 + htab->sgot->output_section->vma 4185 + htab->sgot->output_offset); 4186 outrel.r_info = ELF32_R_INFO (indx,R_PARISC_TLS_DTPMOD32); 4187 outrel.r_addend = 0; 4188 bfd_put_32 (output_bfd, 0, htab->sgot->contents + cur_off); 4189 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 4190 htab->srelgot->reloc_count++; 4191 loc += sizeof (Elf32_External_Rela); 4192 4193 if (indx == 0) 4194 bfd_put_32 (output_bfd, relocation - dtpoff_base (info), 4195 htab->sgot->contents + cur_off + 4); 4196 else 4197 { 4198 bfd_put_32 (output_bfd, 0, 4199 htab->sgot->contents + cur_off + 4); 4200 outrel.r_info = ELF32_R_INFO (indx, R_PARISC_TLS_DTPOFF32); 4201 outrel.r_offset += 4; 4202 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); 4203 htab->srelgot->reloc_count++; 4204 loc += sizeof (Elf32_External_Rela); 4205 } 4206 } 4207 else 4208 { 4209 /* If we are not emitting relocations for a 4210 general dynamic reference, then we must be in a 4211 static link or an executable link with the 4212 symbol binding locally. Mark it as belonging 4213 to module 1, the executable. */ 4214 bfd_put_32 (output_bfd, 1, 4215 htab->sgot->contents + cur_off); 4216 bfd_put_32 (output_bfd, relocation - dtpoff_base (info), 4217 htab->sgot->contents + cur_off + 4); 4218 } 4219 4220 4221 cur_off += 8; 4222 } 4223 4224 if (tls_type & GOT_TLS_IE) 4225 { 4226 if (need_relocs) 4227 { 4228 outrel.r_offset = (cur_off 4229 + htab->sgot->output_section->vma 4230 + htab->sgot->output_offset); 4231 outrel.r_info = ELF32_R_INFO (indx, R_PARISC_TLS_TPREL32); 4232 4233 if (indx == 0) 4234 outrel.r_addend = relocation - dtpoff_base (info); 4235 else 4236 outrel.r_addend = 0; 4237 4238 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 4239 htab->srelgot->reloc_count++; 4240 loc += sizeof (Elf32_External_Rela); 4241 } 4242 else 4243 bfd_put_32 (output_bfd, tpoff (info, relocation), 4244 htab->sgot->contents + cur_off); 4245 4246 cur_off += 4; 4247 } 4248 4249 if (hh != NULL) 4250 hh->eh.got.offset |= 1; 4251 else 4252 local_got_offsets[r_symndx] |= 1; 4253 } 4254 4255 if ((tls_type & GOT_TLS_GD) 4256 && r_type != R_PARISC_TLS_GD21L 4257 && r_type != R_PARISC_TLS_GD14R) 4258 off += 2 * GOT_ENTRY_SIZE; 4259 4260 /* Add the base of the GOT to the relocation value. */ 4261 relocation = (off 4262 + htab->sgot->output_offset 4263 + htab->sgot->output_section->vma); 4264 4265 break; 4266 } 4267 4268 case R_PARISC_TLS_LE21L: 4269 case R_PARISC_TLS_LE14R: 4270 { 4271 relocation = tpoff (info, relocation); 4272 break; 4273 } 4274 break; 4275 4276 default: 4277 break; 4278 } 4279 4280 rstatus = final_link_relocate (input_section, contents, rela, relocation, 4281 htab, sym_sec, hh, info); 4282 4283 if (rstatus == bfd_reloc_ok) 4284 continue; 4285 4286 if (hh != NULL) 4287 sym_name = hh_name (hh); 4288 else 4289 { 4290 sym_name = bfd_elf_string_from_elf_section (input_bfd, 4291 symtab_hdr->sh_link, 4292 sym->st_name); 4293 if (sym_name == NULL) 4294 return FALSE; 4295 if (*sym_name == '\0') 4296 sym_name = bfd_section_name (input_bfd, sym_sec); 4297 } 4298 4299 howto = elf_hppa_howto_table + r_type; 4300 4301 if (rstatus == bfd_reloc_undefined || rstatus == bfd_reloc_notsupported) 4302 { 4303 if (rstatus == bfd_reloc_notsupported || !warned_undef) 4304 { 4305 (*_bfd_error_handler) 4306 (_("%B(%A+0x%lx): cannot handle %s for %s"), 4307 input_bfd, 4308 input_section, 4309 (long) rela->r_offset, 4310 howto->name, 4311 sym_name); 4312 bfd_set_error (bfd_error_bad_value); 4313 return FALSE; 4314 } 4315 } 4316 else 4317 (*info->callbacks->reloc_overflow) 4318 (info, (hh ? &hh->eh.root : NULL), sym_name, howto->name, 4319 (bfd_vma) 0, input_bfd, input_section, rela->r_offset); 4320 } 4321 4322 return TRUE; 4323 } 4324 4325 /* Finish up dynamic symbol handling. We set the contents of various 4326 dynamic sections here. */ 4327 4328 static bfd_boolean 4329 elf32_hppa_finish_dynamic_symbol (bfd *output_bfd, 4330 struct bfd_link_info *info, 4331 struct elf_link_hash_entry *eh, 4332 Elf_Internal_Sym *sym) 4333 { 4334 struct elf32_hppa_link_hash_table *htab; 4335 Elf_Internal_Rela rela; 4336 bfd_byte *loc; 4337 4338 htab = hppa_link_hash_table (info); 4339 if (htab == NULL) 4340 return FALSE; 4341 4342 if (eh->plt.offset != (bfd_vma) -1) 4343 { 4344 bfd_vma value; 4345 4346 if (eh->plt.offset & 1) 4347 abort (); 4348 4349 /* This symbol has an entry in the procedure linkage table. Set 4350 it up. 4351 4352 The format of a plt entry is 4353 <funcaddr> 4354 <__gp> 4355 */ 4356 value = 0; 4357 if (eh->root.type == bfd_link_hash_defined 4358 || eh->root.type == bfd_link_hash_defweak) 4359 { 4360 value = eh->root.u.def.value; 4361 if (eh->root.u.def.section->output_section != NULL) 4362 value += (eh->root.u.def.section->output_offset 4363 + eh->root.u.def.section->output_section->vma); 4364 } 4365 4366 /* Create a dynamic IPLT relocation for this entry. */ 4367 rela.r_offset = (eh->plt.offset 4368 + htab->splt->output_offset 4369 + htab->splt->output_section->vma); 4370 if (eh->dynindx != -1) 4371 { 4372 rela.r_info = ELF32_R_INFO (eh->dynindx, R_PARISC_IPLT); 4373 rela.r_addend = 0; 4374 } 4375 else 4376 { 4377 /* This symbol has been marked to become local, and is 4378 used by a plabel so must be kept in the .plt. */ 4379 rela.r_info = ELF32_R_INFO (0, R_PARISC_IPLT); 4380 rela.r_addend = value; 4381 } 4382 4383 loc = htab->srelplt->contents; 4384 loc += htab->srelplt->reloc_count++ * sizeof (Elf32_External_Rela); 4385 bfd_elf32_swap_reloca_out (htab->splt->output_section->owner, &rela, loc); 4386 4387 if (!eh->def_regular) 4388 { 4389 /* Mark the symbol as undefined, rather than as defined in 4390 the .plt section. Leave the value alone. */ 4391 sym->st_shndx = SHN_UNDEF; 4392 } 4393 } 4394 4395 if (eh->got.offset != (bfd_vma) -1 4396 && (hppa_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0 4397 && (hppa_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0) 4398 { 4399 /* This symbol has an entry in the global offset table. Set it 4400 up. */ 4401 4402 rela.r_offset = ((eh->got.offset &~ (bfd_vma) 1) 4403 + htab->sgot->output_offset 4404 + htab->sgot->output_section->vma); 4405 4406 /* If this is a -Bsymbolic link and the symbol is defined 4407 locally or was forced to be local because of a version file, 4408 we just want to emit a RELATIVE reloc. The entry in the 4409 global offset table will already have been initialized in the 4410 relocate_section function. */ 4411 if (bfd_link_pic (info) 4412 && (SYMBOLIC_BIND (info, eh) || eh->dynindx == -1) 4413 && eh->def_regular) 4414 { 4415 rela.r_info = ELF32_R_INFO (0, R_PARISC_DIR32); 4416 rela.r_addend = (eh->root.u.def.value 4417 + eh->root.u.def.section->output_offset 4418 + eh->root.u.def.section->output_section->vma); 4419 } 4420 else 4421 { 4422 if ((eh->got.offset & 1) != 0) 4423 abort (); 4424 4425 bfd_put_32 (output_bfd, 0, htab->sgot->contents + (eh->got.offset & ~1)); 4426 rela.r_info = ELF32_R_INFO (eh->dynindx, R_PARISC_DIR32); 4427 rela.r_addend = 0; 4428 } 4429 4430 loc = htab->srelgot->contents; 4431 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 4432 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 4433 } 4434 4435 if (eh->needs_copy) 4436 { 4437 asection *sec; 4438 4439 /* This symbol needs a copy reloc. Set it up. */ 4440 4441 if (! (eh->dynindx != -1 4442 && (eh->root.type == bfd_link_hash_defined 4443 || eh->root.type == bfd_link_hash_defweak))) 4444 abort (); 4445 4446 sec = htab->srelbss; 4447 4448 rela.r_offset = (eh->root.u.def.value 4449 + eh->root.u.def.section->output_offset 4450 + eh->root.u.def.section->output_section->vma); 4451 rela.r_addend = 0; 4452 rela.r_info = ELF32_R_INFO (eh->dynindx, R_PARISC_COPY); 4453 loc = sec->contents + sec->reloc_count++ * sizeof (Elf32_External_Rela); 4454 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 4455 } 4456 4457 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ 4458 if (eh == htab->etab.hdynamic || eh == htab->etab.hgot) 4459 { 4460 sym->st_shndx = SHN_ABS; 4461 } 4462 4463 return TRUE; 4464 } 4465 4466 /* Used to decide how to sort relocs in an optimal manner for the 4467 dynamic linker, before writing them out. */ 4468 4469 static enum elf_reloc_type_class 4470 elf32_hppa_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 4471 const asection *rel_sec ATTRIBUTE_UNUSED, 4472 const Elf_Internal_Rela *rela) 4473 { 4474 /* Handle TLS relocs first; we don't want them to be marked 4475 relative by the "if (ELF32_R_SYM (rela->r_info) == STN_UNDEF)" 4476 check below. */ 4477 switch ((int) ELF32_R_TYPE (rela->r_info)) 4478 { 4479 case R_PARISC_TLS_DTPMOD32: 4480 case R_PARISC_TLS_DTPOFF32: 4481 case R_PARISC_TLS_TPREL32: 4482 return reloc_class_normal; 4483 } 4484 4485 if (ELF32_R_SYM (rela->r_info) == STN_UNDEF) 4486 return reloc_class_relative; 4487 4488 switch ((int) ELF32_R_TYPE (rela->r_info)) 4489 { 4490 case R_PARISC_IPLT: 4491 return reloc_class_plt; 4492 case R_PARISC_COPY: 4493 return reloc_class_copy; 4494 default: 4495 return reloc_class_normal; 4496 } 4497 } 4498 4499 /* Finish up the dynamic sections. */ 4500 4501 static bfd_boolean 4502 elf32_hppa_finish_dynamic_sections (bfd *output_bfd, 4503 struct bfd_link_info *info) 4504 { 4505 bfd *dynobj; 4506 struct elf32_hppa_link_hash_table *htab; 4507 asection *sdyn; 4508 asection * sgot; 4509 4510 htab = hppa_link_hash_table (info); 4511 if (htab == NULL) 4512 return FALSE; 4513 4514 dynobj = htab->etab.dynobj; 4515 4516 sgot = htab->sgot; 4517 /* A broken linker script might have discarded the dynamic sections. 4518 Catch this here so that we do not seg-fault later on. */ 4519 if (sgot != NULL && bfd_is_abs_section (sgot->output_section)) 4520 return FALSE; 4521 4522 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 4523 4524 if (htab->etab.dynamic_sections_created) 4525 { 4526 Elf32_External_Dyn *dyncon, *dynconend; 4527 4528 if (sdyn == NULL) 4529 abort (); 4530 4531 dyncon = (Elf32_External_Dyn *) sdyn->contents; 4532 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 4533 for (; dyncon < dynconend; dyncon++) 4534 { 4535 Elf_Internal_Dyn dyn; 4536 asection *s; 4537 4538 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 4539 4540 switch (dyn.d_tag) 4541 { 4542 default: 4543 continue; 4544 4545 case DT_PLTGOT: 4546 /* Use PLTGOT to set the GOT register. */ 4547 dyn.d_un.d_ptr = elf_gp (output_bfd); 4548 break; 4549 4550 case DT_JMPREL: 4551 s = htab->srelplt; 4552 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 4553 break; 4554 4555 case DT_PLTRELSZ: 4556 s = htab->srelplt; 4557 dyn.d_un.d_val = s->size; 4558 break; 4559 4560 case DT_RELASZ: 4561 /* Don't count procedure linkage table relocs in the 4562 overall reloc count. */ 4563 s = htab->srelplt; 4564 if (s == NULL) 4565 continue; 4566 dyn.d_un.d_val -= s->size; 4567 break; 4568 4569 case DT_RELA: 4570 /* We may not be using the standard ELF linker script. 4571 If .rela.plt is the first .rela section, we adjust 4572 DT_RELA to not include it. */ 4573 s = htab->srelplt; 4574 if (s == NULL) 4575 continue; 4576 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset) 4577 continue; 4578 dyn.d_un.d_ptr += s->size; 4579 break; 4580 } 4581 4582 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 4583 } 4584 } 4585 4586 if (sgot != NULL && sgot->size != 0) 4587 { 4588 /* Fill in the first entry in the global offset table. 4589 We use it to point to our dynamic section, if we have one. */ 4590 bfd_put_32 (output_bfd, 4591 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0, 4592 sgot->contents); 4593 4594 /* The second entry is reserved for use by the dynamic linker. */ 4595 memset (sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE); 4596 4597 /* Set .got entry size. */ 4598 elf_section_data (sgot->output_section) 4599 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE; 4600 } 4601 4602 if (htab->splt != NULL && htab->splt->size != 0) 4603 { 4604 /* Set plt entry size to 0 instead of PLT_ENTRY_SIZE, since we add the 4605 plt stubs and as such the section does not hold a table of fixed-size 4606 entries. */ 4607 elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize = 0; 4608 4609 if (htab->need_plt_stub) 4610 { 4611 /* Set up the .plt stub. */ 4612 memcpy (htab->splt->contents 4613 + htab->splt->size - sizeof (plt_stub), 4614 plt_stub, sizeof (plt_stub)); 4615 4616 if ((htab->splt->output_offset 4617 + htab->splt->output_section->vma 4618 + htab->splt->size) 4619 != (sgot->output_offset 4620 + sgot->output_section->vma)) 4621 { 4622 (*_bfd_error_handler) 4623 (_(".got section not immediately after .plt section")); 4624 return FALSE; 4625 } 4626 } 4627 } 4628 4629 return TRUE; 4630 } 4631 4632 /* Called when writing out an object file to decide the type of a 4633 symbol. */ 4634 static int 4635 elf32_hppa_elf_get_symbol_type (Elf_Internal_Sym *elf_sym, int type) 4636 { 4637 if (ELF_ST_TYPE (elf_sym->st_info) == STT_PARISC_MILLI) 4638 return STT_PARISC_MILLI; 4639 else 4640 return type; 4641 } 4642 4643 /* Misc BFD support code. */ 4644 #define bfd_elf32_bfd_is_local_label_name elf_hppa_is_local_label_name 4645 #define bfd_elf32_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup 4646 #define bfd_elf32_bfd_reloc_name_lookup elf_hppa_reloc_name_lookup 4647 #define elf_info_to_howto elf_hppa_info_to_howto 4648 #define elf_info_to_howto_rel elf_hppa_info_to_howto_rel 4649 4650 /* Stuff for the BFD linker. */ 4651 #define bfd_elf32_bfd_final_link elf32_hppa_final_link 4652 #define bfd_elf32_bfd_link_hash_table_create elf32_hppa_link_hash_table_create 4653 #define elf_backend_adjust_dynamic_symbol elf32_hppa_adjust_dynamic_symbol 4654 #define elf_backend_copy_indirect_symbol elf32_hppa_copy_indirect_symbol 4655 #define elf_backend_check_relocs elf32_hppa_check_relocs 4656 #define elf_backend_create_dynamic_sections elf32_hppa_create_dynamic_sections 4657 #define elf_backend_fake_sections elf_hppa_fake_sections 4658 #define elf_backend_relocate_section elf32_hppa_relocate_section 4659 #define elf_backend_hide_symbol elf32_hppa_hide_symbol 4660 #define elf_backend_finish_dynamic_symbol elf32_hppa_finish_dynamic_symbol 4661 #define elf_backend_finish_dynamic_sections elf32_hppa_finish_dynamic_sections 4662 #define elf_backend_size_dynamic_sections elf32_hppa_size_dynamic_sections 4663 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 4664 #define elf_backend_gc_mark_hook elf32_hppa_gc_mark_hook 4665 #define elf_backend_gc_sweep_hook elf32_hppa_gc_sweep_hook 4666 #define elf_backend_grok_prstatus elf32_hppa_grok_prstatus 4667 #define elf_backend_grok_psinfo elf32_hppa_grok_psinfo 4668 #define elf_backend_object_p elf32_hppa_object_p 4669 #define elf_backend_final_write_processing elf_hppa_final_write_processing 4670 #define elf_backend_get_symbol_type elf32_hppa_elf_get_symbol_type 4671 #define elf_backend_reloc_type_class elf32_hppa_reloc_type_class 4672 #define elf_backend_action_discarded elf_hppa_action_discarded 4673 4674 #define elf_backend_can_gc_sections 1 4675 #define elf_backend_can_refcount 1 4676 #define elf_backend_plt_alignment 2 4677 #define elf_backend_want_got_plt 0 4678 #define elf_backend_plt_readonly 0 4679 #define elf_backend_want_plt_sym 0 4680 #define elf_backend_got_header_size 8 4681 #define elf_backend_rela_normal 1 4682 4683 #define TARGET_BIG_SYM hppa_elf32_vec 4684 #define TARGET_BIG_NAME "elf32-hppa" 4685 #define ELF_ARCH bfd_arch_hppa 4686 #define ELF_TARGET_ID HPPA32_ELF_DATA 4687 #define ELF_MACHINE_CODE EM_PARISC 4688 #define ELF_MAXPAGESIZE 0x1000 4689 #define ELF_OSABI ELFOSABI_HPUX 4690 #define elf32_bed elf32_hppa_hpux_bed 4691 4692 #include "elf32-target.h" 4693 4694 #undef TARGET_BIG_SYM 4695 #define TARGET_BIG_SYM hppa_elf32_linux_vec 4696 #undef TARGET_BIG_NAME 4697 #define TARGET_BIG_NAME "elf32-hppa-linux" 4698 #undef ELF_OSABI 4699 #define ELF_OSABI ELFOSABI_GNU 4700 #undef elf32_bed 4701 #define elf32_bed elf32_hppa_linux_bed 4702 4703 #include "elf32-target.h" 4704 4705 #undef TARGET_BIG_SYM 4706 #define TARGET_BIG_SYM hppa_elf32_nbsd_vec 4707 #undef TARGET_BIG_NAME 4708 #define TARGET_BIG_NAME "elf32-hppa-netbsd" 4709 #undef ELF_OSABI 4710 #define ELF_OSABI ELFOSABI_NETBSD 4711 #undef elf32_bed 4712 #define elf32_bed elf32_hppa_netbsd_bed 4713 4714 #include "elf32-target.h" 4715