| 1 | /* Support for HPPA 64-bit ELF |
| 2 | Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of BFD, the Binary File Descriptor library. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | #include "alloca-conf.h" |
| 21 | #include "bfd.h" |
| 22 | #include "sysdep.h" |
| 23 | #include "libbfd.h" |
| 24 | #include "elf-bfd.h" |
| 25 | #include "elf/hppa.h" |
| 26 | #include "libhppa.h" |
| 27 | #include "elf64-hppa.h" |
| 28 | #define ARCH_SIZE 64 |
| 29 | |
| 30 | #define PLT_ENTRY_SIZE 0x10 |
| 31 | #define DLT_ENTRY_SIZE 0x8 |
| 32 | #define OPD_ENTRY_SIZE 0x20 |
| 33 | |
| 34 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/pa20_64/dld.sl" |
| 35 | |
| 36 | /* The stub is supposed to load the target address and target's DP |
| 37 | value out of the PLT, then do an external branch to the target |
| 38 | address. |
| 39 | |
| 40 | LDD PLTOFF(%r27),%r1 |
| 41 | BVE (%r1) |
| 42 | LDD PLTOFF+8(%r27),%r27 |
| 43 | |
| 44 | Note that we must use the LDD with a 14 bit displacement, not the one |
| 45 | with a 5 bit displacement. */ |
| 46 | static char plt_stub[] = {0x53, 0x61, 0x00, 0x00, 0xe8, 0x20, 0xd0, 0x00, |
| 47 | 0x53, 0x7b, 0x00, 0x00 }; |
| 48 | |
| 49 | struct elf64_hppa_dyn_hash_entry |
| 50 | { |
| 51 | struct bfd_hash_entry root; |
| 52 | |
| 53 | /* Offsets for this symbol in various linker sections. */ |
| 54 | bfd_vma dlt_offset; |
| 55 | bfd_vma plt_offset; |
| 56 | bfd_vma opd_offset; |
| 57 | bfd_vma stub_offset; |
| 58 | |
| 59 | /* The symbol table entry, if any, that this was derived from. */ |
| 60 | struct elf_link_hash_entry *h; |
| 61 | |
| 62 | /* The index of the (possibly local) symbol in the input bfd and its |
| 63 | associated BFD. Needed so that we can have relocs against local |
| 64 | symbols in shared libraries. */ |
| 65 | long sym_indx; |
| 66 | bfd *owner; |
| 67 | |
| 68 | /* Dynamic symbols may need to have two different values. One for |
| 69 | the dynamic symbol table, one for the normal symbol table. |
| 70 | |
| 71 | In such cases we store the symbol's real value and section |
| 72 | index here so we can restore the real value before we write |
| 73 | the normal symbol table. */ |
| 74 | bfd_vma st_value; |
| 75 | int st_shndx; |
| 76 | |
| 77 | /* Used to count non-got, non-plt relocations for delayed sizing |
| 78 | of relocation sections. */ |
| 79 | struct elf64_hppa_dyn_reloc_entry |
| 80 | { |
| 81 | /* Next relocation in the chain. */ |
| 82 | struct elf64_hppa_dyn_reloc_entry *next; |
| 83 | |
| 84 | /* The type of the relocation. */ |
| 85 | int type; |
| 86 | |
| 87 | /* The input section of the relocation. */ |
| 88 | asection *sec; |
| 89 | |
| 90 | /* The index of the section symbol for the input section of |
| 91 | the relocation. Only needed when building shared libraries. */ |
| 92 | int sec_symndx; |
| 93 | |
| 94 | /* The offset within the input section of the relocation. */ |
| 95 | bfd_vma offset; |
| 96 | |
| 97 | /* The addend for the relocation. */ |
| 98 | bfd_vma addend; |
| 99 | |
| 100 | } *reloc_entries; |
| 101 | |
| 102 | /* Nonzero if this symbol needs an entry in one of the linker |
| 103 | sections. */ |
| 104 | unsigned want_dlt; |
| 105 | unsigned want_plt; |
| 106 | unsigned want_opd; |
| 107 | unsigned want_stub; |
| 108 | }; |
| 109 | |
| 110 | struct elf64_hppa_dyn_hash_table |
| 111 | { |
| 112 | struct bfd_hash_table root; |
| 113 | }; |
| 114 | |
| 115 | struct elf64_hppa_link_hash_table |
| 116 | { |
| 117 | struct elf_link_hash_table root; |
| 118 | |
| 119 | /* Shortcuts to get to the various linker defined sections. */ |
| 120 | asection *dlt_sec; |
| 121 | asection *dlt_rel_sec; |
| 122 | asection *plt_sec; |
| 123 | asection *plt_rel_sec; |
| 124 | asection *opd_sec; |
| 125 | asection *opd_rel_sec; |
| 126 | asection *other_rel_sec; |
| 127 | |
| 128 | /* Offset of __gp within .plt section. When the PLT gets large we want |
| 129 | to slide __gp into the PLT section so that we can continue to use |
| 130 | single DP relative instructions to load values out of the PLT. */ |
| 131 | bfd_vma gp_offset; |
| 132 | |
| 133 | /* Note this is not strictly correct. We should create a stub section for |
| 134 | each input section with calls. The stub section should be placed before |
| 135 | the section with the call. */ |
| 136 | asection *stub_sec; |
| 137 | |
| 138 | bfd_vma text_segment_base; |
| 139 | bfd_vma data_segment_base; |
| 140 | |
| 141 | struct elf64_hppa_dyn_hash_table dyn_hash_table; |
| 142 | |
| 143 | /* We build tables to map from an input section back to its |
| 144 | symbol index. This is the BFD for which we currently have |
| 145 | a map. */ |
| 146 | bfd *section_syms_bfd; |
| 147 | |
| 148 | /* Array of symbol numbers for each input section attached to the |
| 149 | current BFD. */ |
| 150 | int *section_syms; |
| 151 | }; |
| 152 | |
| 153 | #define elf64_hppa_hash_table(p) \ |
| 154 | ((struct elf64_hppa_link_hash_table *) ((p)->hash)) |
| 155 | |
| 156 | typedef struct bfd_hash_entry *(*new_hash_entry_func) |
| 157 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| 158 | |
| 159 | static boolean elf64_hppa_dyn_hash_table_init |
| 160 | PARAMS ((struct elf64_hppa_dyn_hash_table *ht, bfd *abfd, |
| 161 | new_hash_entry_func new)); |
| 162 | static struct bfd_hash_entry *elf64_hppa_new_dyn_hash_entry |
| 163 | PARAMS ((struct bfd_hash_entry *entry, struct bfd_hash_table *table, |
| 164 | const char *string)); |
| 165 | static struct bfd_link_hash_table *elf64_hppa_hash_table_create |
| 166 | PARAMS ((bfd *abfd)); |
| 167 | static struct elf64_hppa_dyn_hash_entry *elf64_hppa_dyn_hash_lookup |
| 168 | PARAMS ((struct elf64_hppa_dyn_hash_table *table, const char *string, |
| 169 | boolean create, boolean copy)); |
| 170 | static void elf64_hppa_dyn_hash_traverse |
| 171 | PARAMS ((struct elf64_hppa_dyn_hash_table *table, |
| 172 | boolean (*func) (struct elf64_hppa_dyn_hash_entry *, PTR), |
| 173 | PTR info)); |
| 174 | |
| 175 | static const char *get_dyn_name |
| 176 | PARAMS ((asection *, struct elf_link_hash_entry *, |
| 177 | const Elf_Internal_Rela *, char **, size_t *)); |
| 178 | |
| 179 | /* This must follow the definitions of the various derived linker |
| 180 | hash tables and shared functions. */ |
| 181 | #include "elf-hppa.h" |
| 182 | |
| 183 | static boolean elf64_hppa_object_p |
| 184 | PARAMS ((bfd *)); |
| 185 | |
| 186 | static boolean elf64_hppa_section_from_shdr |
| 187 | PARAMS ((bfd *, Elf64_Internal_Shdr *, const char *)); |
| 188 | |
| 189 | static void elf64_hppa_post_process_headers |
| 190 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 191 | |
| 192 | static boolean elf64_hppa_create_dynamic_sections |
| 193 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 194 | |
| 195 | static boolean elf64_hppa_adjust_dynamic_symbol |
| 196 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
| 197 | |
| 198 | static boolean elf64_hppa_mark_milli_and_exported_functions |
| 199 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
| 200 | |
| 201 | static boolean elf64_hppa_size_dynamic_sections |
| 202 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 203 | |
| 204 | static boolean elf64_hppa_link_output_symbol_hook |
| 205 | PARAMS ((bfd *abfd, struct bfd_link_info *, const char *, |
| 206 | Elf_Internal_Sym *, asection *input_sec)); |
| 207 | |
| 208 | static boolean elf64_hppa_finish_dynamic_symbol |
| 209 | PARAMS ((bfd *, struct bfd_link_info *, |
| 210 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
| 211 | |
| 212 | static int elf64_hppa_additional_program_headers PARAMS ((bfd *)); |
| 213 | |
| 214 | static boolean elf64_hppa_modify_segment_map PARAMS ((bfd *)); |
| 215 | |
| 216 | static boolean elf64_hppa_finish_dynamic_sections |
| 217 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 218 | |
| 219 | static boolean elf64_hppa_check_relocs |
| 220 | PARAMS ((bfd *, struct bfd_link_info *, |
| 221 | asection *, const Elf_Internal_Rela *)); |
| 222 | |
| 223 | static boolean elf64_hppa_dynamic_symbol_p |
| 224 | PARAMS ((struct elf_link_hash_entry *, struct bfd_link_info *)); |
| 225 | |
| 226 | static boolean elf64_hppa_mark_exported_functions |
| 227 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
| 228 | |
| 229 | static boolean elf64_hppa_finalize_opd |
| 230 | PARAMS ((struct elf64_hppa_dyn_hash_entry *, PTR)); |
| 231 | |
| 232 | static boolean elf64_hppa_finalize_dlt |
| 233 | PARAMS ((struct elf64_hppa_dyn_hash_entry *, PTR)); |
| 234 | |
| 235 | static boolean allocate_global_data_dlt |
| 236 | PARAMS ((struct elf64_hppa_dyn_hash_entry *, PTR)); |
| 237 | |
| 238 | static boolean allocate_global_data_plt |
| 239 | PARAMS ((struct elf64_hppa_dyn_hash_entry *, PTR)); |
| 240 | |
| 241 | static boolean allocate_global_data_stub |
| 242 | PARAMS ((struct elf64_hppa_dyn_hash_entry *, PTR)); |
| 243 | |
| 244 | static boolean allocate_global_data_opd |
| 245 | PARAMS ((struct elf64_hppa_dyn_hash_entry *, PTR)); |
| 246 | |
| 247 | static boolean get_reloc_section |
| 248 | PARAMS ((bfd *, struct elf64_hppa_link_hash_table *, asection *)); |
| 249 | |
| 250 | static boolean count_dyn_reloc |
| 251 | PARAMS ((bfd *, struct elf64_hppa_dyn_hash_entry *, |
| 252 | int, asection *, int, bfd_vma, bfd_vma)); |
| 253 | |
| 254 | static boolean allocate_dynrel_entries |
| 255 | PARAMS ((struct elf64_hppa_dyn_hash_entry *, PTR)); |
| 256 | |
| 257 | static boolean elf64_hppa_finalize_dynreloc |
| 258 | PARAMS ((struct elf64_hppa_dyn_hash_entry *, PTR)); |
| 259 | |
| 260 | static boolean get_opd |
| 261 | PARAMS ((bfd *, struct bfd_link_info *, struct elf64_hppa_link_hash_table *)); |
| 262 | |
| 263 | static boolean get_plt |
| 264 | PARAMS ((bfd *, struct bfd_link_info *, struct elf64_hppa_link_hash_table *)); |
| 265 | |
| 266 | static boolean get_dlt |
| 267 | PARAMS ((bfd *, struct bfd_link_info *, struct elf64_hppa_link_hash_table *)); |
| 268 | |
| 269 | static boolean get_stub |
| 270 | PARAMS ((bfd *, struct bfd_link_info *, struct elf64_hppa_link_hash_table *)); |
| 271 | |
| 272 | static int elf64_hppa_elf_get_symbol_type |
| 273 | PARAMS ((Elf_Internal_Sym *, int)); |
| 274 | |
| 275 | static boolean |
| 276 | elf64_hppa_dyn_hash_table_init (ht, abfd, new) |
| 277 | struct elf64_hppa_dyn_hash_table *ht; |
| 278 | bfd *abfd ATTRIBUTE_UNUSED; |
| 279 | new_hash_entry_func new; |
| 280 | { |
| 281 | memset (ht, 0, sizeof (*ht)); |
| 282 | return bfd_hash_table_init (&ht->root, new); |
| 283 | } |
| 284 | |
| 285 | static struct bfd_hash_entry* |
| 286 | elf64_hppa_new_dyn_hash_entry (entry, table, string) |
| 287 | struct bfd_hash_entry *entry; |
| 288 | struct bfd_hash_table *table; |
| 289 | const char *string; |
| 290 | { |
| 291 | struct elf64_hppa_dyn_hash_entry *ret; |
| 292 | ret = (struct elf64_hppa_dyn_hash_entry *) entry; |
| 293 | |
| 294 | /* Allocate the structure if it has not already been allocated by a |
| 295 | subclass. */ |
| 296 | if (!ret) |
| 297 | ret = bfd_hash_allocate (table, sizeof (*ret)); |
| 298 | |
| 299 | if (!ret) |
| 300 | return 0; |
| 301 | |
| 302 | /* Initialize our local data. All zeros, and definitely easier |
| 303 | than setting 8 bit fields. */ |
| 304 | memset (ret, 0, sizeof (*ret)); |
| 305 | |
| 306 | /* Call the allocation method of the superclass. */ |
| 307 | ret = ((struct elf64_hppa_dyn_hash_entry *) |
| 308 | bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string)); |
| 309 | |
| 310 | return &ret->root; |
| 311 | } |
| 312 | |
| 313 | /* Create the derived linker hash table. The PA64 ELF port uses this |
| 314 | derived hash table to keep information specific to the PA ElF |
| 315 | linker (without using static variables). */ |
| 316 | |
| 317 | static struct bfd_link_hash_table* |
| 318 | elf64_hppa_hash_table_create (abfd) |
| 319 | bfd *abfd; |
| 320 | { |
| 321 | struct elf64_hppa_link_hash_table *ret; |
| 322 | |
| 323 | ret = bfd_zalloc (abfd, (bfd_size_type) sizeof (*ret)); |
| 324 | if (!ret) |
| 325 | return 0; |
| 326 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 327 | _bfd_elf_link_hash_newfunc)) |
| 328 | { |
| 329 | bfd_release (abfd, ret); |
| 330 | return 0; |
| 331 | } |
| 332 | |
| 333 | if (!elf64_hppa_dyn_hash_table_init (&ret->dyn_hash_table, abfd, |
| 334 | elf64_hppa_new_dyn_hash_entry)) |
| 335 | return 0; |
| 336 | return &ret->root.root; |
| 337 | } |
| 338 | |
| 339 | /* Look up an entry in a PA64 ELF linker hash table. */ |
| 340 | |
| 341 | static struct elf64_hppa_dyn_hash_entry * |
| 342 | elf64_hppa_dyn_hash_lookup(table, string, create, copy) |
| 343 | struct elf64_hppa_dyn_hash_table *table; |
| 344 | const char *string; |
| 345 | boolean create, copy; |
| 346 | { |
| 347 | return ((struct elf64_hppa_dyn_hash_entry *) |
| 348 | bfd_hash_lookup (&table->root, string, create, copy)); |
| 349 | } |
| 350 | |
| 351 | /* Traverse a PA64 ELF linker hash table. */ |
| 352 | |
| 353 | static void |
| 354 | elf64_hppa_dyn_hash_traverse (table, func, info) |
| 355 | struct elf64_hppa_dyn_hash_table *table; |
| 356 | boolean (*func) PARAMS ((struct elf64_hppa_dyn_hash_entry *, PTR)); |
| 357 | PTR info; |
| 358 | { |
| 359 | (bfd_hash_traverse |
| 360 | (&table->root, |
| 361 | (boolean (*) PARAMS ((struct bfd_hash_entry *, PTR))) func, |
| 362 | info)); |
| 363 | } |
| 364 | \f |
| 365 | /* Return nonzero if ABFD represents a PA2.0 ELF64 file. |
| 366 | |
| 367 | Additionally we set the default architecture and machine. */ |
| 368 | static boolean |
| 369 | elf64_hppa_object_p (abfd) |
| 370 | bfd *abfd; |
| 371 | { |
| 372 | Elf_Internal_Ehdr * i_ehdrp; |
| 373 | unsigned int flags; |
| 374 | |
| 375 | i_ehdrp = elf_elfheader (abfd); |
| 376 | if (strcmp (bfd_get_target (abfd), "elf64-hppa-linux") == 0) |
| 377 | { |
| 378 | if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_LINUX) |
| 379 | return false; |
| 380 | } |
| 381 | else |
| 382 | { |
| 383 | if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_HPUX) |
| 384 | return false; |
| 385 | } |
| 386 | |
| 387 | flags = i_ehdrp->e_flags; |
| 388 | switch (flags & (EF_PARISC_ARCH | EF_PARISC_WIDE)) |
| 389 | { |
| 390 | case EFA_PARISC_1_0: |
| 391 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 10); |
| 392 | case EFA_PARISC_1_1: |
| 393 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 11); |
| 394 | case EFA_PARISC_2_0: |
| 395 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 20); |
| 396 | case EFA_PARISC_2_0 | EF_PARISC_WIDE: |
| 397 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 25); |
| 398 | } |
| 399 | /* Don't be fussy. */ |
| 400 | return true; |
| 401 | } |
| 402 | |
| 403 | /* Given section type (hdr->sh_type), return a boolean indicating |
| 404 | whether or not the section is an elf64-hppa specific section. */ |
| 405 | static boolean |
| 406 | elf64_hppa_section_from_shdr (abfd, hdr, name) |
| 407 | bfd *abfd; |
| 408 | Elf64_Internal_Shdr *hdr; |
| 409 | const char *name; |
| 410 | { |
| 411 | asection *newsect; |
| 412 | |
| 413 | switch (hdr->sh_type) |
| 414 | { |
| 415 | case SHT_PARISC_EXT: |
| 416 | if (strcmp (name, ".PARISC.archext") != 0) |
| 417 | return false; |
| 418 | break; |
| 419 | case SHT_PARISC_UNWIND: |
| 420 | if (strcmp (name, ".PARISC.unwind") != 0) |
| 421 | return false; |
| 422 | break; |
| 423 | case SHT_PARISC_DOC: |
| 424 | case SHT_PARISC_ANNOT: |
| 425 | default: |
| 426 | return false; |
| 427 | } |
| 428 | |
| 429 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) |
| 430 | return false; |
| 431 | newsect = hdr->bfd_section; |
| 432 | |
| 433 | return true; |
| 434 | } |
| 435 | |
| 436 | /* Construct a string for use in the elf64_hppa_dyn_hash_table. The |
| 437 | name describes what was once potentially anonymous memory. We |
| 438 | allocate memory as necessary, possibly reusing PBUF/PLEN. */ |
| 439 | |
| 440 | static const char * |
| 441 | get_dyn_name (sec, h, rel, pbuf, plen) |
| 442 | asection *sec; |
| 443 | struct elf_link_hash_entry *h; |
| 444 | const Elf_Internal_Rela *rel; |
| 445 | char **pbuf; |
| 446 | size_t *plen; |
| 447 | { |
| 448 | size_t nlen, tlen; |
| 449 | char *buf; |
| 450 | size_t len; |
| 451 | |
| 452 | if (h && rel->r_addend == 0) |
| 453 | return h->root.root.string; |
| 454 | |
| 455 | if (h) |
| 456 | nlen = strlen (h->root.root.string); |
| 457 | else |
| 458 | nlen = 8 + 1 + sizeof (rel->r_info) * 2 - 8; |
| 459 | tlen = nlen + 1 + sizeof (rel->r_addend) * 2 + 1; |
| 460 | |
| 461 | len = *plen; |
| 462 | buf = *pbuf; |
| 463 | if (len < tlen) |
| 464 | { |
| 465 | if (buf) |
| 466 | free (buf); |
| 467 | *pbuf = buf = malloc (tlen); |
| 468 | *plen = len = tlen; |
| 469 | if (!buf) |
| 470 | return NULL; |
| 471 | } |
| 472 | |
| 473 | if (h) |
| 474 | { |
| 475 | memcpy (buf, h->root.root.string, nlen); |
| 476 | buf[nlen++] = '+'; |
| 477 | sprintf_vma (buf + nlen, rel->r_addend); |
| 478 | } |
| 479 | else |
| 480 | { |
| 481 | nlen = sprintf (buf, "%x:%lx", |
| 482 | sec->id & 0xffffffff, |
| 483 | (long) ELF64_R_SYM (rel->r_info)); |
| 484 | if (rel->r_addend) |
| 485 | { |
| 486 | buf[nlen++] = '+'; |
| 487 | sprintf_vma (buf + nlen, rel->r_addend); |
| 488 | } |
| 489 | } |
| 490 | |
| 491 | return buf; |
| 492 | } |
| 493 | |
| 494 | /* SEC is a section containing relocs for an input BFD when linking; return |
| 495 | a suitable section for holding relocs in the output BFD for a link. */ |
| 496 | |
| 497 | static boolean |
| 498 | get_reloc_section (abfd, hppa_info, sec) |
| 499 | bfd *abfd; |
| 500 | struct elf64_hppa_link_hash_table *hppa_info; |
| 501 | asection *sec; |
| 502 | { |
| 503 | const char *srel_name; |
| 504 | asection *srel; |
| 505 | bfd *dynobj; |
| 506 | |
| 507 | srel_name = (bfd_elf_string_from_elf_section |
| 508 | (abfd, elf_elfheader(abfd)->e_shstrndx, |
| 509 | elf_section_data(sec)->rel_hdr.sh_name)); |
| 510 | if (srel_name == NULL) |
| 511 | return false; |
| 512 | |
| 513 | BFD_ASSERT ((strncmp (srel_name, ".rela", 5) == 0 |
| 514 | && strcmp (bfd_get_section_name (abfd, sec), |
| 515 | srel_name+5) == 0) |
| 516 | || (strncmp (srel_name, ".rel", 4) == 0 |
| 517 | && strcmp (bfd_get_section_name (abfd, sec), |
| 518 | srel_name+4) == 0)); |
| 519 | |
| 520 | dynobj = hppa_info->root.dynobj; |
| 521 | if (!dynobj) |
| 522 | hppa_info->root.dynobj = dynobj = abfd; |
| 523 | |
| 524 | srel = bfd_get_section_by_name (dynobj, srel_name); |
| 525 | if (srel == NULL) |
| 526 | { |
| 527 | srel = bfd_make_section (dynobj, srel_name); |
| 528 | if (srel == NULL |
| 529 | || !bfd_set_section_flags (dynobj, srel, |
| 530 | (SEC_ALLOC |
| 531 | | SEC_LOAD |
| 532 | | SEC_HAS_CONTENTS |
| 533 | | SEC_IN_MEMORY |
| 534 | | SEC_LINKER_CREATED |
| 535 | | SEC_READONLY)) |
| 536 | || !bfd_set_section_alignment (dynobj, srel, 3)) |
| 537 | return false; |
| 538 | } |
| 539 | |
| 540 | hppa_info->other_rel_sec = srel; |
| 541 | return true; |
| 542 | } |
| 543 | |
| 544 | /* Add a new entry to the list of dynamic relocations against DYN_H. |
| 545 | |
| 546 | We use this to keep a record of all the FPTR relocations against a |
| 547 | particular symbol so that we can create FPTR relocations in the |
| 548 | output file. */ |
| 549 | |
| 550 | static boolean |
| 551 | count_dyn_reloc (abfd, dyn_h, type, sec, sec_symndx, offset, addend) |
| 552 | bfd *abfd; |
| 553 | struct elf64_hppa_dyn_hash_entry *dyn_h; |
| 554 | int type; |
| 555 | asection *sec; |
| 556 | int sec_symndx; |
| 557 | bfd_vma offset; |
| 558 | bfd_vma addend; |
| 559 | { |
| 560 | struct elf64_hppa_dyn_reloc_entry *rent; |
| 561 | |
| 562 | rent = (struct elf64_hppa_dyn_reloc_entry *) |
| 563 | bfd_alloc (abfd, (bfd_size_type) sizeof (*rent)); |
| 564 | if (!rent) |
| 565 | return false; |
| 566 | |
| 567 | rent->next = dyn_h->reloc_entries; |
| 568 | rent->type = type; |
| 569 | rent->sec = sec; |
| 570 | rent->sec_symndx = sec_symndx; |
| 571 | rent->offset = offset; |
| 572 | rent->addend = addend; |
| 573 | dyn_h->reloc_entries = rent; |
| 574 | |
| 575 | return true; |
| 576 | } |
| 577 | |
| 578 | /* Scan the RELOCS and record the type of dynamic entries that each |
| 579 | referenced symbol needs. */ |
| 580 | |
| 581 | static boolean |
| 582 | elf64_hppa_check_relocs (abfd, info, sec, relocs) |
| 583 | bfd *abfd; |
| 584 | struct bfd_link_info *info; |
| 585 | asection *sec; |
| 586 | const Elf_Internal_Rela *relocs; |
| 587 | { |
| 588 | struct elf64_hppa_link_hash_table *hppa_info; |
| 589 | const Elf_Internal_Rela *relend; |
| 590 | Elf_Internal_Shdr *symtab_hdr; |
| 591 | Elf_Internal_Shdr *shndx_hdr; |
| 592 | const Elf_Internal_Rela *rel; |
| 593 | asection *dlt, *plt, *stubs; |
| 594 | char *buf; |
| 595 | size_t buf_len; |
| 596 | int sec_symndx; |
| 597 | |
| 598 | if (info->relocateable) |
| 599 | return true; |
| 600 | |
| 601 | /* If this is the first dynamic object found in the link, create |
| 602 | the special sections required for dynamic linking. */ |
| 603 | if (! elf_hash_table (info)->dynamic_sections_created) |
| 604 | { |
| 605 | if (! bfd_elf64_link_create_dynamic_sections (abfd, info)) |
| 606 | return false; |
| 607 | } |
| 608 | |
| 609 | hppa_info = elf64_hppa_hash_table (info); |
| 610 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 611 | |
| 612 | /* If necessary, build a new table holding section symbols indices |
| 613 | for this BFD. This is disgusting. */ |
| 614 | |
| 615 | if (info->shared && hppa_info->section_syms_bfd != abfd) |
| 616 | { |
| 617 | unsigned long i; |
| 618 | unsigned int highest_shndx; |
| 619 | Elf_Internal_Sym *local_syms, *isym; |
| 620 | Elf64_External_Sym *ext_syms, *esym; |
| 621 | Elf_External_Sym_Shndx *shndx_buf, *shndx; |
| 622 | bfd_size_type amt; |
| 623 | |
| 624 | /* We're done with the old cache of section index to section symbol |
| 625 | index information. Free it. |
| 626 | |
| 627 | ?!? Note we leak the last section_syms array. Presumably we |
| 628 | could free it in one of the later routines in this file. */ |
| 629 | if (hppa_info->section_syms) |
| 630 | free (hppa_info->section_syms); |
| 631 | |
| 632 | /* Allocate memory for the internal and external symbols. */ |
| 633 | amt = symtab_hdr->sh_info; |
| 634 | amt *= sizeof (Elf_Internal_Sym); |
| 635 | local_syms = (Elf_Internal_Sym *) bfd_malloc (amt); |
| 636 | if (local_syms == NULL) |
| 637 | return false; |
| 638 | |
| 639 | amt = symtab_hdr->sh_info; |
| 640 | amt *= sizeof (Elf64_External_Sym); |
| 641 | ext_syms = (Elf64_External_Sym *) bfd_malloc (amt); |
| 642 | if (ext_syms == NULL) |
| 643 | { |
| 644 | free (local_syms); |
| 645 | return false; |
| 646 | } |
| 647 | |
| 648 | /* Read in the local symbols. */ |
| 649 | if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0 |
| 650 | || bfd_bread (ext_syms, amt, abfd) != amt) |
| 651 | { |
| 652 | free (ext_syms); |
| 653 | free (local_syms); |
| 654 | return false; |
| 655 | } |
| 656 | |
| 657 | shndx_buf = NULL; |
| 658 | shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; |
| 659 | if (shndx_hdr->sh_size != 0) |
| 660 | { |
| 661 | amt = symtab_hdr->sh_info; |
| 662 | amt *= sizeof (Elf_External_Sym_Shndx); |
| 663 | shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt); |
| 664 | if (shndx_buf == NULL) |
| 665 | { |
| 666 | free (ext_syms); |
| 667 | free (local_syms); |
| 668 | return false; |
| 669 | } |
| 670 | |
| 671 | if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0 |
| 672 | || bfd_bread (shndx_buf, amt, abfd) != amt) |
| 673 | { |
| 674 | free (shndx_buf); |
| 675 | free (ext_syms); |
| 676 | free (local_syms); |
| 677 | return false; |
| 678 | } |
| 679 | } |
| 680 | |
| 681 | /* Swap in the local symbols, also record the highest section index |
| 682 | referenced by the local symbols. */ |
| 683 | highest_shndx = 0; |
| 684 | for (i = 0, isym = local_syms, esym = ext_syms, shndx = shndx_buf; |
| 685 | i < symtab_hdr->sh_info; |
| 686 | i++, esym++, isym++, shndx = (shndx != NULL ? shndx + 1 : NULL)) |
| 687 | { |
| 688 | bfd_elf64_swap_symbol_in (abfd, (const PTR) esym, (const PTR) shndx, |
| 689 | isym); |
| 690 | if (isym->st_shndx > highest_shndx) |
| 691 | highest_shndx = isym->st_shndx; |
| 692 | } |
| 693 | |
| 694 | /* Now we can free the external symbols. */ |
| 695 | free (shndx_buf); |
| 696 | free (ext_syms); |
| 697 | |
| 698 | /* Allocate an array to hold the section index to section symbol index |
| 699 | mapping. Bump by one since we start counting at zero. */ |
| 700 | highest_shndx++; |
| 701 | amt = highest_shndx; |
| 702 | amt *= sizeof (int); |
| 703 | hppa_info->section_syms = (int *) bfd_malloc (amt); |
| 704 | |
| 705 | /* Now walk the local symbols again. If we find a section symbol, |
| 706 | record the index of the symbol into the section_syms array. */ |
| 707 | for (isym = local_syms, i = 0; i < symtab_hdr->sh_info; i++, isym++) |
| 708 | { |
| 709 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) |
| 710 | hppa_info->section_syms[isym->st_shndx] = i; |
| 711 | } |
| 712 | |
| 713 | /* We are finished with the local symbols. Get rid of them. */ |
| 714 | free (local_syms); |
| 715 | |
| 716 | /* Record which BFD we built the section_syms mapping for. */ |
| 717 | hppa_info->section_syms_bfd = abfd; |
| 718 | } |
| 719 | |
| 720 | /* Record the symbol index for this input section. We may need it for |
| 721 | relocations when building shared libraries. When not building shared |
| 722 | libraries this value is never really used, but assign it to zero to |
| 723 | prevent out of bounds memory accesses in other routines. */ |
| 724 | if (info->shared) |
| 725 | { |
| 726 | sec_symndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| 727 | |
| 728 | /* If we did not find a section symbol for this section, then |
| 729 | something went terribly wrong above. */ |
| 730 | if (sec_symndx == -1) |
| 731 | return false; |
| 732 | |
| 733 | sec_symndx = hppa_info->section_syms[sec_symndx]; |
| 734 | } |
| 735 | else |
| 736 | sec_symndx = 0; |
| 737 | |
| 738 | dlt = plt = stubs = NULL; |
| 739 | buf = NULL; |
| 740 | buf_len = 0; |
| 741 | |
| 742 | relend = relocs + sec->reloc_count; |
| 743 | for (rel = relocs; rel < relend; ++rel) |
| 744 | { |
| 745 | enum { |
| 746 | NEED_DLT = 1, |
| 747 | NEED_PLT = 2, |
| 748 | NEED_STUB = 4, |
| 749 | NEED_OPD = 8, |
| 750 | NEED_DYNREL = 16, |
| 751 | }; |
| 752 | |
| 753 | struct elf_link_hash_entry *h = NULL; |
| 754 | unsigned long r_symndx = ELF64_R_SYM (rel->r_info); |
| 755 | struct elf64_hppa_dyn_hash_entry *dyn_h; |
| 756 | int need_entry; |
| 757 | const char *addr_name; |
| 758 | boolean maybe_dynamic; |
| 759 | int dynrel_type = R_PARISC_NONE; |
| 760 | static reloc_howto_type *howto; |
| 761 | |
| 762 | if (r_symndx >= symtab_hdr->sh_info) |
| 763 | { |
| 764 | /* We're dealing with a global symbol -- find its hash entry |
| 765 | and mark it as being referenced. */ |
| 766 | long indx = r_symndx - symtab_hdr->sh_info; |
| 767 | h = elf_sym_hashes (abfd)[indx]; |
| 768 | while (h->root.type == bfd_link_hash_indirect |
| 769 | || h->root.type == bfd_link_hash_warning) |
| 770 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 771 | |
| 772 | h->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; |
| 773 | } |
| 774 | |
| 775 | /* We can only get preliminary data on whether a symbol is |
| 776 | locally or externally defined, as not all of the input files |
| 777 | have yet been processed. Do something with what we know, as |
| 778 | this may help reduce memory usage and processing time later. */ |
| 779 | maybe_dynamic = false; |
| 780 | if (h && ((info->shared |
| 781 | && (!info->symbolic || info->allow_shlib_undefined) ) |
| 782 | || ! (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) |
| 783 | || h->root.type == bfd_link_hash_defweak)) |
| 784 | maybe_dynamic = true; |
| 785 | |
| 786 | howto = elf_hppa_howto_table + ELF64_R_TYPE (rel->r_info); |
| 787 | need_entry = 0; |
| 788 | switch (howto->type) |
| 789 | { |
| 790 | /* These are simple indirect references to symbols through the |
| 791 | DLT. We need to create a DLT entry for any symbols which |
| 792 | appears in a DLTIND relocation. */ |
| 793 | case R_PARISC_DLTIND21L: |
| 794 | case R_PARISC_DLTIND14R: |
| 795 | case R_PARISC_DLTIND14F: |
| 796 | case R_PARISC_DLTIND14WR: |
| 797 | case R_PARISC_DLTIND14DR: |
| 798 | need_entry = NEED_DLT; |
| 799 | break; |
| 800 | |
| 801 | /* ?!? These need a DLT entry. But I have no idea what to do with |
| 802 | the "link time TP value. */ |
| 803 | case R_PARISC_LTOFF_TP21L: |
| 804 | case R_PARISC_LTOFF_TP14R: |
| 805 | case R_PARISC_LTOFF_TP14F: |
| 806 | case R_PARISC_LTOFF_TP64: |
| 807 | case R_PARISC_LTOFF_TP14WR: |
| 808 | case R_PARISC_LTOFF_TP14DR: |
| 809 | case R_PARISC_LTOFF_TP16F: |
| 810 | case R_PARISC_LTOFF_TP16WF: |
| 811 | case R_PARISC_LTOFF_TP16DF: |
| 812 | need_entry = NEED_DLT; |
| 813 | break; |
| 814 | |
| 815 | /* These are function calls. Depending on their precise target we |
| 816 | may need to make a stub for them. The stub uses the PLT, so we |
| 817 | need to create PLT entries for these symbols too. */ |
| 818 | case R_PARISC_PCREL12F: |
| 819 | case R_PARISC_PCREL17F: |
| 820 | case R_PARISC_PCREL22F: |
| 821 | case R_PARISC_PCREL32: |
| 822 | case R_PARISC_PCREL64: |
| 823 | case R_PARISC_PCREL21L: |
| 824 | case R_PARISC_PCREL17R: |
| 825 | case R_PARISC_PCREL17C: |
| 826 | case R_PARISC_PCREL14R: |
| 827 | case R_PARISC_PCREL14F: |
| 828 | case R_PARISC_PCREL22C: |
| 829 | case R_PARISC_PCREL14WR: |
| 830 | case R_PARISC_PCREL14DR: |
| 831 | case R_PARISC_PCREL16F: |
| 832 | case R_PARISC_PCREL16WF: |
| 833 | case R_PARISC_PCREL16DF: |
| 834 | need_entry = (NEED_PLT | NEED_STUB); |
| 835 | break; |
| 836 | |
| 837 | case R_PARISC_PLTOFF21L: |
| 838 | case R_PARISC_PLTOFF14R: |
| 839 | case R_PARISC_PLTOFF14F: |
| 840 | case R_PARISC_PLTOFF14WR: |
| 841 | case R_PARISC_PLTOFF14DR: |
| 842 | case R_PARISC_PLTOFF16F: |
| 843 | case R_PARISC_PLTOFF16WF: |
| 844 | case R_PARISC_PLTOFF16DF: |
| 845 | need_entry = (NEED_PLT); |
| 846 | break; |
| 847 | |
| 848 | case R_PARISC_DIR64: |
| 849 | if (info->shared || maybe_dynamic) |
| 850 | need_entry = (NEED_DYNREL); |
| 851 | dynrel_type = R_PARISC_DIR64; |
| 852 | break; |
| 853 | |
| 854 | /* This is an indirect reference through the DLT to get the address |
| 855 | of a OPD descriptor. Thus we need to make a DLT entry that points |
| 856 | to an OPD entry. */ |
| 857 | case R_PARISC_LTOFF_FPTR21L: |
| 858 | case R_PARISC_LTOFF_FPTR14R: |
| 859 | case R_PARISC_LTOFF_FPTR14WR: |
| 860 | case R_PARISC_LTOFF_FPTR14DR: |
| 861 | case R_PARISC_LTOFF_FPTR32: |
| 862 | case R_PARISC_LTOFF_FPTR64: |
| 863 | case R_PARISC_LTOFF_FPTR16F: |
| 864 | case R_PARISC_LTOFF_FPTR16WF: |
| 865 | case R_PARISC_LTOFF_FPTR16DF: |
| 866 | if (info->shared || maybe_dynamic) |
| 867 | need_entry = (NEED_DLT | NEED_OPD); |
| 868 | else |
| 869 | need_entry = (NEED_DLT | NEED_OPD); |
| 870 | dynrel_type = R_PARISC_FPTR64; |
| 871 | break; |
| 872 | |
| 873 | /* This is a simple OPD entry. */ |
| 874 | case R_PARISC_FPTR64: |
| 875 | if (info->shared || maybe_dynamic) |
| 876 | need_entry = (NEED_OPD | NEED_DYNREL); |
| 877 | else |
| 878 | need_entry = (NEED_OPD); |
| 879 | dynrel_type = R_PARISC_FPTR64; |
| 880 | break; |
| 881 | |
| 882 | /* Add more cases as needed. */ |
| 883 | } |
| 884 | |
| 885 | if (!need_entry) |
| 886 | continue; |
| 887 | |
| 888 | /* Collect a canonical name for this address. */ |
| 889 | addr_name = get_dyn_name (sec, h, rel, &buf, &buf_len); |
| 890 | |
| 891 | /* Collect the canonical entry data for this address. */ |
| 892 | dyn_h = elf64_hppa_dyn_hash_lookup (&hppa_info->dyn_hash_table, |
| 893 | addr_name, true, true); |
| 894 | BFD_ASSERT (dyn_h); |
| 895 | |
| 896 | /* Stash away enough information to be able to find this symbol |
| 897 | regardless of whether or not it is local or global. */ |
| 898 | dyn_h->h = h; |
| 899 | dyn_h->owner = abfd; |
| 900 | dyn_h->sym_indx = r_symndx; |
| 901 | |
| 902 | /* ?!? We may need to do some error checking in here. */ |
| 903 | /* Create what's needed. */ |
| 904 | if (need_entry & NEED_DLT) |
| 905 | { |
| 906 | if (! hppa_info->dlt_sec |
| 907 | && ! get_dlt (abfd, info, hppa_info)) |
| 908 | goto err_out; |
| 909 | dyn_h->want_dlt = 1; |
| 910 | } |
| 911 | |
| 912 | if (need_entry & NEED_PLT) |
| 913 | { |
| 914 | if (! hppa_info->plt_sec |
| 915 | && ! get_plt (abfd, info, hppa_info)) |
| 916 | goto err_out; |
| 917 | dyn_h->want_plt = 1; |
| 918 | } |
| 919 | |
| 920 | if (need_entry & NEED_STUB) |
| 921 | { |
| 922 | if (! hppa_info->stub_sec |
| 923 | && ! get_stub (abfd, info, hppa_info)) |
| 924 | goto err_out; |
| 925 | dyn_h->want_stub = 1; |
| 926 | } |
| 927 | |
| 928 | if (need_entry & NEED_OPD) |
| 929 | { |
| 930 | if (! hppa_info->opd_sec |
| 931 | && ! get_opd (abfd, info, hppa_info)) |
| 932 | goto err_out; |
| 933 | |
| 934 | dyn_h->want_opd = 1; |
| 935 | |
| 936 | /* FPTRs are not allocated by the dynamic linker for PA64, though |
| 937 | it is possible that will change in the future. */ |
| 938 | |
| 939 | /* This could be a local function that had its address taken, in |
| 940 | which case H will be NULL. */ |
| 941 | if (h) |
| 942 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 943 | } |
| 944 | |
| 945 | /* Add a new dynamic relocation to the chain of dynamic |
| 946 | relocations for this symbol. */ |
| 947 | if ((need_entry & NEED_DYNREL) && (sec->flags & SEC_ALLOC)) |
| 948 | { |
| 949 | if (! hppa_info->other_rel_sec |
| 950 | && ! get_reloc_section (abfd, hppa_info, sec)) |
| 951 | goto err_out; |
| 952 | |
| 953 | if (!count_dyn_reloc (abfd, dyn_h, dynrel_type, sec, |
| 954 | sec_symndx, rel->r_offset, rel->r_addend)) |
| 955 | goto err_out; |
| 956 | |
| 957 | /* If we are building a shared library and we just recorded |
| 958 | a dynamic R_PARISC_FPTR64 relocation, then make sure the |
| 959 | section symbol for this section ends up in the dynamic |
| 960 | symbol table. */ |
| 961 | if (info->shared && dynrel_type == R_PARISC_FPTR64 |
| 962 | && ! (_bfd_elf64_link_record_local_dynamic_symbol |
| 963 | (info, abfd, sec_symndx))) |
| 964 | return false; |
| 965 | } |
| 966 | } |
| 967 | |
| 968 | if (buf) |
| 969 | free (buf); |
| 970 | return true; |
| 971 | |
| 972 | err_out: |
| 973 | if (buf) |
| 974 | free (buf); |
| 975 | return false; |
| 976 | } |
| 977 | |
| 978 | struct elf64_hppa_allocate_data |
| 979 | { |
| 980 | struct bfd_link_info *info; |
| 981 | bfd_size_type ofs; |
| 982 | }; |
| 983 | |
| 984 | /* Should we do dynamic things to this symbol? */ |
| 985 | |
| 986 | static boolean |
| 987 | elf64_hppa_dynamic_symbol_p (h, info) |
| 988 | struct elf_link_hash_entry *h; |
| 989 | struct bfd_link_info *info; |
| 990 | { |
| 991 | if (h == NULL) |
| 992 | return false; |
| 993 | |
| 994 | while (h->root.type == bfd_link_hash_indirect |
| 995 | || h->root.type == bfd_link_hash_warning) |
| 996 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 997 | |
| 998 | if (h->dynindx == -1) |
| 999 | return false; |
| 1000 | |
| 1001 | if (h->root.type == bfd_link_hash_undefweak |
| 1002 | || h->root.type == bfd_link_hash_defweak) |
| 1003 | return true; |
| 1004 | |
| 1005 | if (h->root.root.string[0] == '$' && h->root.root.string[1] == '$') |
| 1006 | return false; |
| 1007 | |
| 1008 | if ((info->shared && (!info->symbolic || info->allow_shlib_undefined)) |
| 1009 | || ((h->elf_link_hash_flags |
| 1010 | & (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR)) |
| 1011 | == (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR))) |
| 1012 | return true; |
| 1013 | |
| 1014 | return false; |
| 1015 | } |
| 1016 | |
| 1017 | /* Mark all funtions exported by this file so that we can later allocate |
| 1018 | entries in .opd for them. */ |
| 1019 | |
| 1020 | static boolean |
| 1021 | elf64_hppa_mark_exported_functions (h, data) |
| 1022 | struct elf_link_hash_entry *h; |
| 1023 | PTR data; |
| 1024 | { |
| 1025 | struct bfd_link_info *info = (struct bfd_link_info *)data; |
| 1026 | struct elf64_hppa_link_hash_table *hppa_info; |
| 1027 | |
| 1028 | hppa_info = elf64_hppa_hash_table (info); |
| 1029 | |
| 1030 | if (h->root.type == bfd_link_hash_warning) |
| 1031 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1032 | |
| 1033 | if (h |
| 1034 | && (h->root.type == bfd_link_hash_defined |
| 1035 | || h->root.type == bfd_link_hash_defweak) |
| 1036 | && h->root.u.def.section->output_section != NULL |
| 1037 | && h->type == STT_FUNC) |
| 1038 | { |
| 1039 | struct elf64_hppa_dyn_hash_entry *dyn_h; |
| 1040 | |
| 1041 | /* Add this symbol to the PA64 linker hash table. */ |
| 1042 | dyn_h = elf64_hppa_dyn_hash_lookup (&hppa_info->dyn_hash_table, |
| 1043 | h->root.root.string, true, true); |
| 1044 | BFD_ASSERT (dyn_h); |
| 1045 | dyn_h->h = h; |
| 1046 | |
| 1047 | if (! hppa_info->opd_sec |
| 1048 | && ! get_opd (hppa_info->root.dynobj, info, hppa_info)) |
| 1049 | return false; |
| 1050 | |
| 1051 | dyn_h->want_opd = 1; |
| 1052 | /* Put a flag here for output_symbol_hook. */ |
| 1053 | dyn_h->st_shndx = -1; |
| 1054 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 1055 | } |
| 1056 | |
| 1057 | return true; |
| 1058 | } |
| 1059 | |
| 1060 | /* Allocate space for a DLT entry. */ |
| 1061 | |
| 1062 | static boolean |
| 1063 | allocate_global_data_dlt (dyn_h, data) |
| 1064 | struct elf64_hppa_dyn_hash_entry *dyn_h; |
| 1065 | PTR data; |
| 1066 | { |
| 1067 | struct elf64_hppa_allocate_data *x = (struct elf64_hppa_allocate_data *)data; |
| 1068 | |
| 1069 | if (dyn_h->want_dlt) |
| 1070 | { |
| 1071 | struct elf_link_hash_entry *h = dyn_h->h; |
| 1072 | |
| 1073 | if (x->info->shared) |
| 1074 | { |
| 1075 | /* Possibly add the symbol to the local dynamic symbol |
| 1076 | table since we might need to create a dynamic relocation |
| 1077 | against it. */ |
| 1078 | if (! h |
| 1079 | || (h->dynindx == -1 && h->type != STT_PARISC_MILLI)) |
| 1080 | { |
| 1081 | bfd *owner; |
| 1082 | owner = (h ? h->root.u.def.section->owner : dyn_h->owner); |
| 1083 | |
| 1084 | if (! (_bfd_elf64_link_record_local_dynamic_symbol |
| 1085 | (x->info, owner, dyn_h->sym_indx))) |
| 1086 | return false; |
| 1087 | } |
| 1088 | } |
| 1089 | |
| 1090 | dyn_h->dlt_offset = x->ofs; |
| 1091 | x->ofs += DLT_ENTRY_SIZE; |
| 1092 | } |
| 1093 | return true; |
| 1094 | } |
| 1095 | |
| 1096 | /* Allocate space for a DLT.PLT entry. */ |
| 1097 | |
| 1098 | static boolean |
| 1099 | allocate_global_data_plt (dyn_h, data) |
| 1100 | struct elf64_hppa_dyn_hash_entry *dyn_h; |
| 1101 | PTR data; |
| 1102 | { |
| 1103 | struct elf64_hppa_allocate_data *x = (struct elf64_hppa_allocate_data *)data; |
| 1104 | |
| 1105 | if (dyn_h->want_plt |
| 1106 | && elf64_hppa_dynamic_symbol_p (dyn_h->h, x->info) |
| 1107 | && !((dyn_h->h->root.type == bfd_link_hash_defined |
| 1108 | || dyn_h->h->root.type == bfd_link_hash_defweak) |
| 1109 | && dyn_h->h->root.u.def.section->output_section != NULL)) |
| 1110 | { |
| 1111 | dyn_h->plt_offset = x->ofs; |
| 1112 | x->ofs += PLT_ENTRY_SIZE; |
| 1113 | if (dyn_h->plt_offset < 0x2000) |
| 1114 | elf64_hppa_hash_table (x->info)->gp_offset = dyn_h->plt_offset; |
| 1115 | } |
| 1116 | else |
| 1117 | dyn_h->want_plt = 0; |
| 1118 | |
| 1119 | return true; |
| 1120 | } |
| 1121 | |
| 1122 | /* Allocate space for a STUB entry. */ |
| 1123 | |
| 1124 | static boolean |
| 1125 | allocate_global_data_stub (dyn_h, data) |
| 1126 | struct elf64_hppa_dyn_hash_entry *dyn_h; |
| 1127 | PTR data; |
| 1128 | { |
| 1129 | struct elf64_hppa_allocate_data *x = (struct elf64_hppa_allocate_data *)data; |
| 1130 | |
| 1131 | if (dyn_h->want_stub |
| 1132 | && elf64_hppa_dynamic_symbol_p (dyn_h->h, x->info) |
| 1133 | && !((dyn_h->h->root.type == bfd_link_hash_defined |
| 1134 | || dyn_h->h->root.type == bfd_link_hash_defweak) |
| 1135 | && dyn_h->h->root.u.def.section->output_section != NULL)) |
| 1136 | { |
| 1137 | dyn_h->stub_offset = x->ofs; |
| 1138 | x->ofs += sizeof (plt_stub); |
| 1139 | } |
| 1140 | else |
| 1141 | dyn_h->want_stub = 0; |
| 1142 | return true; |
| 1143 | } |
| 1144 | |
| 1145 | /* Allocate space for a FPTR entry. */ |
| 1146 | |
| 1147 | static boolean |
| 1148 | allocate_global_data_opd (dyn_h, data) |
| 1149 | struct elf64_hppa_dyn_hash_entry *dyn_h; |
| 1150 | PTR data; |
| 1151 | { |
| 1152 | struct elf64_hppa_allocate_data *x = (struct elf64_hppa_allocate_data *)data; |
| 1153 | |
| 1154 | if (dyn_h->want_opd) |
| 1155 | { |
| 1156 | struct elf_link_hash_entry *h = dyn_h->h; |
| 1157 | |
| 1158 | if (h) |
| 1159 | while (h->root.type == bfd_link_hash_indirect |
| 1160 | || h->root.type == bfd_link_hash_warning) |
| 1161 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1162 | |
| 1163 | /* We never need an opd entry for a symbol which is not |
| 1164 | defined by this output file. */ |
| 1165 | if (h && (h->root.type == bfd_link_hash_undefined |
| 1166 | || h->root.u.def.section->output_section == NULL)) |
| 1167 | dyn_h->want_opd = 0; |
| 1168 | |
| 1169 | /* If we are creating a shared library, took the address of a local |
| 1170 | function or might export this function from this object file, then |
| 1171 | we have to create an opd descriptor. */ |
| 1172 | else if (x->info->shared |
| 1173 | || h == NULL |
| 1174 | || (h->dynindx == -1 && h->type != STT_PARISC_MILLI) |
| 1175 | || (h->root.type == bfd_link_hash_defined |
| 1176 | || h->root.type == bfd_link_hash_defweak)) |
| 1177 | { |
| 1178 | /* If we are creating a shared library, then we will have to |
| 1179 | create a runtime relocation for the symbol to properly |
| 1180 | initialize the .opd entry. Make sure the symbol gets |
| 1181 | added to the dynamic symbol table. */ |
| 1182 | if (x->info->shared |
| 1183 | && (h == NULL || (h->dynindx == -1))) |
| 1184 | { |
| 1185 | bfd *owner; |
| 1186 | owner = (h ? h->root.u.def.section->owner : dyn_h->owner); |
| 1187 | |
| 1188 | if (!_bfd_elf64_link_record_local_dynamic_symbol |
| 1189 | (x->info, owner, dyn_h->sym_indx)) |
| 1190 | return false; |
| 1191 | } |
| 1192 | |
| 1193 | /* This may not be necessary or desirable anymore now that |
| 1194 | we have some support for dealing with section symbols |
| 1195 | in dynamic relocs. But name munging does make the result |
| 1196 | much easier to debug. ie, the EPLT reloc will reference |
| 1197 | a symbol like .foobar, instead of .text + offset. */ |
| 1198 | if (x->info->shared && h) |
| 1199 | { |
| 1200 | char *new_name; |
| 1201 | struct elf_link_hash_entry *nh; |
| 1202 | |
| 1203 | new_name = alloca (strlen (h->root.root.string) + 2); |
| 1204 | new_name[0] = '.'; |
| 1205 | strcpy (new_name + 1, h->root.root.string); |
| 1206 | |
| 1207 | nh = elf_link_hash_lookup (elf_hash_table (x->info), |
| 1208 | new_name, true, true, true); |
| 1209 | |
| 1210 | nh->root.type = h->root.type; |
| 1211 | nh->root.u.def.value = h->root.u.def.value; |
| 1212 | nh->root.u.def.section = h->root.u.def.section; |
| 1213 | |
| 1214 | if (! bfd_elf64_link_record_dynamic_symbol (x->info, nh)) |
| 1215 | return false; |
| 1216 | |
| 1217 | } |
| 1218 | dyn_h->opd_offset = x->ofs; |
| 1219 | x->ofs += OPD_ENTRY_SIZE; |
| 1220 | } |
| 1221 | |
| 1222 | /* Otherwise we do not need an opd entry. */ |
| 1223 | else |
| 1224 | dyn_h->want_opd = 0; |
| 1225 | } |
| 1226 | return true; |
| 1227 | } |
| 1228 | |
| 1229 | /* HP requires the EI_OSABI field to be filled in. The assignment to |
| 1230 | EI_ABIVERSION may not be strictly necessary. */ |
| 1231 | |
| 1232 | static void |
| 1233 | elf64_hppa_post_process_headers (abfd, link_info) |
| 1234 | bfd * abfd; |
| 1235 | struct bfd_link_info * link_info ATTRIBUTE_UNUSED; |
| 1236 | { |
| 1237 | Elf_Internal_Ehdr * i_ehdrp; |
| 1238 | |
| 1239 | i_ehdrp = elf_elfheader (abfd); |
| 1240 | |
| 1241 | if (strcmp (bfd_get_target (abfd), "elf64-hppa-linux") == 0) |
| 1242 | { |
| 1243 | i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX; |
| 1244 | } |
| 1245 | else |
| 1246 | { |
| 1247 | i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_HPUX; |
| 1248 | i_ehdrp->e_ident[EI_ABIVERSION] = 1; |
| 1249 | } |
| 1250 | } |
| 1251 | |
| 1252 | /* Create function descriptor section (.opd). This section is called .opd |
| 1253 | because it contains "official prodecure descriptors". The "official" |
| 1254 | refers to the fact that these descriptors are used when taking the address |
| 1255 | of a procedure, thus ensuring a unique address for each procedure. */ |
| 1256 | |
| 1257 | static boolean |
| 1258 | get_opd (abfd, info, hppa_info) |
| 1259 | bfd *abfd; |
| 1260 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 1261 | struct elf64_hppa_link_hash_table *hppa_info; |
| 1262 | { |
| 1263 | asection *opd; |
| 1264 | bfd *dynobj; |
| 1265 | |
| 1266 | opd = hppa_info->opd_sec; |
| 1267 | if (!opd) |
| 1268 | { |
| 1269 | dynobj = hppa_info->root.dynobj; |
| 1270 | if (!dynobj) |
| 1271 | hppa_info->root.dynobj = dynobj = abfd; |
| 1272 | |
| 1273 | opd = bfd_make_section (dynobj, ".opd"); |
| 1274 | if (!opd |
| 1275 | || !bfd_set_section_flags (dynobj, opd, |
| 1276 | (SEC_ALLOC |
| 1277 | | SEC_LOAD |
| 1278 | | SEC_HAS_CONTENTS |
| 1279 | | SEC_IN_MEMORY |
| 1280 | | SEC_LINKER_CREATED)) |
| 1281 | || !bfd_set_section_alignment (abfd, opd, 3)) |
| 1282 | { |
| 1283 | BFD_ASSERT (0); |
| 1284 | return false; |
| 1285 | } |
| 1286 | |
| 1287 | hppa_info->opd_sec = opd; |
| 1288 | } |
| 1289 | |
| 1290 | return true; |
| 1291 | } |
| 1292 | |
| 1293 | /* Create the PLT section. */ |
| 1294 | |
| 1295 | static boolean |
| 1296 | get_plt (abfd, info, hppa_info) |
| 1297 | bfd *abfd; |
| 1298 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 1299 | struct elf64_hppa_link_hash_table *hppa_info; |
| 1300 | { |
| 1301 | asection *plt; |
| 1302 | bfd *dynobj; |
| 1303 | |
| 1304 | plt = hppa_info->plt_sec; |
| 1305 | if (!plt) |
| 1306 | { |
| 1307 | dynobj = hppa_info->root.dynobj; |
| 1308 | if (!dynobj) |
| 1309 | hppa_info->root.dynobj = dynobj = abfd; |
| 1310 | |
| 1311 | plt = bfd_make_section (dynobj, ".plt"); |
| 1312 | if (!plt |
| 1313 | || !bfd_set_section_flags (dynobj, plt, |
| 1314 | (SEC_ALLOC |
| 1315 | | SEC_LOAD |
| 1316 | | SEC_HAS_CONTENTS |
| 1317 | | SEC_IN_MEMORY |
| 1318 | | SEC_LINKER_CREATED)) |
| 1319 | || !bfd_set_section_alignment (abfd, plt, 3)) |
| 1320 | { |
| 1321 | BFD_ASSERT (0); |
| 1322 | return false; |
| 1323 | } |
| 1324 | |
| 1325 | hppa_info->plt_sec = plt; |
| 1326 | } |
| 1327 | |
| 1328 | return true; |
| 1329 | } |
| 1330 | |
| 1331 | /* Create the DLT section. */ |
| 1332 | |
| 1333 | static boolean |
| 1334 | get_dlt (abfd, info, hppa_info) |
| 1335 | bfd *abfd; |
| 1336 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 1337 | struct elf64_hppa_link_hash_table *hppa_info; |
| 1338 | { |
| 1339 | asection *dlt; |
| 1340 | bfd *dynobj; |
| 1341 | |
| 1342 | dlt = hppa_info->dlt_sec; |
| 1343 | if (!dlt) |
| 1344 | { |
| 1345 | dynobj = hppa_info->root.dynobj; |
| 1346 | if (!dynobj) |
| 1347 | hppa_info->root.dynobj = dynobj = abfd; |
| 1348 | |
| 1349 | dlt = bfd_make_section (dynobj, ".dlt"); |
| 1350 | if (!dlt |
| 1351 | || !bfd_set_section_flags (dynobj, dlt, |
| 1352 | (SEC_ALLOC |
| 1353 | | SEC_LOAD |
| 1354 | | SEC_HAS_CONTENTS |
| 1355 | | SEC_IN_MEMORY |
| 1356 | | SEC_LINKER_CREATED)) |
| 1357 | || !bfd_set_section_alignment (abfd, dlt, 3)) |
| 1358 | { |
| 1359 | BFD_ASSERT (0); |
| 1360 | return false; |
| 1361 | } |
| 1362 | |
| 1363 | hppa_info->dlt_sec = dlt; |
| 1364 | } |
| 1365 | |
| 1366 | return true; |
| 1367 | } |
| 1368 | |
| 1369 | /* Create the stubs section. */ |
| 1370 | |
| 1371 | static boolean |
| 1372 | get_stub (abfd, info, hppa_info) |
| 1373 | bfd *abfd; |
| 1374 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 1375 | struct elf64_hppa_link_hash_table *hppa_info; |
| 1376 | { |
| 1377 | asection *stub; |
| 1378 | bfd *dynobj; |
| 1379 | |
| 1380 | stub = hppa_info->stub_sec; |
| 1381 | if (!stub) |
| 1382 | { |
| 1383 | dynobj = hppa_info->root.dynobj; |
| 1384 | if (!dynobj) |
| 1385 | hppa_info->root.dynobj = dynobj = abfd; |
| 1386 | |
| 1387 | stub = bfd_make_section (dynobj, ".stub"); |
| 1388 | if (!stub |
| 1389 | || !bfd_set_section_flags (dynobj, stub, |
| 1390 | (SEC_ALLOC |
| 1391 | | SEC_LOAD |
| 1392 | | SEC_HAS_CONTENTS |
| 1393 | | SEC_IN_MEMORY |
| 1394 | | SEC_READONLY |
| 1395 | | SEC_LINKER_CREATED)) |
| 1396 | || !bfd_set_section_alignment (abfd, stub, 3)) |
| 1397 | { |
| 1398 | BFD_ASSERT (0); |
| 1399 | return false; |
| 1400 | } |
| 1401 | |
| 1402 | hppa_info->stub_sec = stub; |
| 1403 | } |
| 1404 | |
| 1405 | return true; |
| 1406 | } |
| 1407 | |
| 1408 | /* Create sections necessary for dynamic linking. This is only a rough |
| 1409 | cut and will likely change as we learn more about the somewhat |
| 1410 | unusual dynamic linking scheme HP uses. |
| 1411 | |
| 1412 | .stub: |
| 1413 | Contains code to implement cross-space calls. The first time one |
| 1414 | of the stubs is used it will call into the dynamic linker, later |
| 1415 | calls will go straight to the target. |
| 1416 | |
| 1417 | The only stub we support right now looks like |
| 1418 | |
| 1419 | ldd OFFSET(%dp),%r1 |
| 1420 | bve %r0(%r1) |
| 1421 | ldd OFFSET+8(%dp),%dp |
| 1422 | |
| 1423 | Other stubs may be needed in the future. We may want the remove |
| 1424 | the break/nop instruction. It is only used right now to keep the |
| 1425 | offset of a .plt entry and a .stub entry in sync. |
| 1426 | |
| 1427 | .dlt: |
| 1428 | This is what most people call the .got. HP used a different name. |
| 1429 | Losers. |
| 1430 | |
| 1431 | .rela.dlt: |
| 1432 | Relocations for the DLT. |
| 1433 | |
| 1434 | .plt: |
| 1435 | Function pointers as address,gp pairs. |
| 1436 | |
| 1437 | .rela.plt: |
| 1438 | Should contain dynamic IPLT (and EPLT?) relocations. |
| 1439 | |
| 1440 | .opd: |
| 1441 | FPTRS |
| 1442 | |
| 1443 | .rela.opd: |
| 1444 | EPLT relocations for symbols exported from shared libraries. */ |
| 1445 | |
| 1446 | static boolean |
| 1447 | elf64_hppa_create_dynamic_sections (abfd, info) |
| 1448 | bfd *abfd; |
| 1449 | struct bfd_link_info *info; |
| 1450 | { |
| 1451 | asection *s; |
| 1452 | |
| 1453 | if (! get_stub (abfd, info, elf64_hppa_hash_table (info))) |
| 1454 | return false; |
| 1455 | |
| 1456 | if (! get_dlt (abfd, info, elf64_hppa_hash_table (info))) |
| 1457 | return false; |
| 1458 | |
| 1459 | if (! get_plt (abfd, info, elf64_hppa_hash_table (info))) |
| 1460 | return false; |
| 1461 | |
| 1462 | if (! get_opd (abfd, info, elf64_hppa_hash_table (info))) |
| 1463 | return false; |
| 1464 | |
| 1465 | s = bfd_make_section(abfd, ".rela.dlt"); |
| 1466 | if (s == NULL |
| 1467 | || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD |
| 1468 | | SEC_HAS_CONTENTS |
| 1469 | | SEC_IN_MEMORY |
| 1470 | | SEC_READONLY |
| 1471 | | SEC_LINKER_CREATED)) |
| 1472 | || !bfd_set_section_alignment (abfd, s, 3)) |
| 1473 | return false; |
| 1474 | elf64_hppa_hash_table (info)->dlt_rel_sec = s; |
| 1475 | |
| 1476 | s = bfd_make_section(abfd, ".rela.plt"); |
| 1477 | if (s == NULL |
| 1478 | || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD |
| 1479 | | SEC_HAS_CONTENTS |
| 1480 | | SEC_IN_MEMORY |
| 1481 | | SEC_READONLY |
| 1482 | | SEC_LINKER_CREATED)) |
| 1483 | || !bfd_set_section_alignment (abfd, s, 3)) |
| 1484 | return false; |
| 1485 | elf64_hppa_hash_table (info)->plt_rel_sec = s; |
| 1486 | |
| 1487 | s = bfd_make_section(abfd, ".rela.data"); |
| 1488 | if (s == NULL |
| 1489 | || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD |
| 1490 | | SEC_HAS_CONTENTS |
| 1491 | | SEC_IN_MEMORY |
| 1492 | | SEC_READONLY |
| 1493 | | SEC_LINKER_CREATED)) |
| 1494 | || !bfd_set_section_alignment (abfd, s, 3)) |
| 1495 | return false; |
| 1496 | elf64_hppa_hash_table (info)->other_rel_sec = s; |
| 1497 | |
| 1498 | s = bfd_make_section(abfd, ".rela.opd"); |
| 1499 | if (s == NULL |
| 1500 | || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD |
| 1501 | | SEC_HAS_CONTENTS |
| 1502 | | SEC_IN_MEMORY |
| 1503 | | SEC_READONLY |
| 1504 | | SEC_LINKER_CREATED)) |
| 1505 | || !bfd_set_section_alignment (abfd, s, 3)) |
| 1506 | return false; |
| 1507 | elf64_hppa_hash_table (info)->opd_rel_sec = s; |
| 1508 | |
| 1509 | return true; |
| 1510 | } |
| 1511 | |
| 1512 | /* Allocate dynamic relocations for those symbols that turned out |
| 1513 | to be dynamic. */ |
| 1514 | |
| 1515 | static boolean |
| 1516 | allocate_dynrel_entries (dyn_h, data) |
| 1517 | struct elf64_hppa_dyn_hash_entry *dyn_h; |
| 1518 | PTR data; |
| 1519 | { |
| 1520 | struct elf64_hppa_allocate_data *x = (struct elf64_hppa_allocate_data *)data; |
| 1521 | struct elf64_hppa_link_hash_table *hppa_info; |
| 1522 | struct elf64_hppa_dyn_reloc_entry *rent; |
| 1523 | boolean dynamic_symbol, shared; |
| 1524 | |
| 1525 | hppa_info = elf64_hppa_hash_table (x->info); |
| 1526 | dynamic_symbol = elf64_hppa_dynamic_symbol_p (dyn_h->h, x->info); |
| 1527 | shared = x->info->shared; |
| 1528 | |
| 1529 | /* We may need to allocate relocations for a non-dynamic symbol |
| 1530 | when creating a shared library. */ |
| 1531 | if (!dynamic_symbol && !shared) |
| 1532 | return true; |
| 1533 | |
| 1534 | /* Take care of the normal data relocations. */ |
| 1535 | |
| 1536 | for (rent = dyn_h->reloc_entries; rent; rent = rent->next) |
| 1537 | { |
| 1538 | /* Allocate one iff we are building a shared library, the relocation |
| 1539 | isn't a R_PARISC_FPTR64, or we don't want an opd entry. */ |
| 1540 | if (!shared && rent->type == R_PARISC_FPTR64 && dyn_h->want_opd) |
| 1541 | continue; |
| 1542 | |
| 1543 | hppa_info->other_rel_sec->_raw_size += sizeof (Elf64_External_Rela); |
| 1544 | |
| 1545 | /* Make sure this symbol gets into the dynamic symbol table if it is |
| 1546 | not already recorded. ?!? This should not be in the loop since |
| 1547 | the symbol need only be added once. */ |
| 1548 | if (dyn_h->h == 0 |
| 1549 | || (dyn_h->h->dynindx == -1 && dyn_h->h->type != STT_PARISC_MILLI)) |
| 1550 | if (!_bfd_elf64_link_record_local_dynamic_symbol |
| 1551 | (x->info, rent->sec->owner, dyn_h->sym_indx)) |
| 1552 | return false; |
| 1553 | } |
| 1554 | |
| 1555 | /* Take care of the GOT and PLT relocations. */ |
| 1556 | |
| 1557 | if ((dynamic_symbol || shared) && dyn_h->want_dlt) |
| 1558 | hppa_info->dlt_rel_sec->_raw_size += sizeof (Elf64_External_Rela); |
| 1559 | |
| 1560 | /* If we are building a shared library, then every symbol that has an |
| 1561 | opd entry will need an EPLT relocation to relocate the symbol's address |
| 1562 | and __gp value based on the runtime load address. */ |
| 1563 | if (shared && dyn_h->want_opd) |
| 1564 | hppa_info->opd_rel_sec->_raw_size += sizeof (Elf64_External_Rela); |
| 1565 | |
| 1566 | if (dyn_h->want_plt && dynamic_symbol) |
| 1567 | { |
| 1568 | bfd_size_type t = 0; |
| 1569 | |
| 1570 | /* Dynamic symbols get one IPLT relocation. Local symbols in |
| 1571 | shared libraries get two REL relocations. Local symbols in |
| 1572 | main applications get nothing. */ |
| 1573 | if (dynamic_symbol) |
| 1574 | t = sizeof (Elf64_External_Rela); |
| 1575 | else if (shared) |
| 1576 | t = 2 * sizeof (Elf64_External_Rela); |
| 1577 | |
| 1578 | hppa_info->plt_rel_sec->_raw_size += t; |
| 1579 | } |
| 1580 | |
| 1581 | return true; |
| 1582 | } |
| 1583 | |
| 1584 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 1585 | regular object. */ |
| 1586 | |
| 1587 | static boolean |
| 1588 | elf64_hppa_adjust_dynamic_symbol (info, h) |
| 1589 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 1590 | struct elf_link_hash_entry *h; |
| 1591 | { |
| 1592 | /* ??? Undefined symbols with PLT entries should be re-defined |
| 1593 | to be the PLT entry. */ |
| 1594 | |
| 1595 | /* If this is a weak symbol, and there is a real definition, the |
| 1596 | processor independent code will have arranged for us to see the |
| 1597 | real definition first, and we can just use the same value. */ |
| 1598 | if (h->weakdef != NULL) |
| 1599 | { |
| 1600 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
| 1601 | || h->weakdef->root.type == bfd_link_hash_defweak); |
| 1602 | h->root.u.def.section = h->weakdef->root.u.def.section; |
| 1603 | h->root.u.def.value = h->weakdef->root.u.def.value; |
| 1604 | return true; |
| 1605 | } |
| 1606 | |
| 1607 | /* If this is a reference to a symbol defined by a dynamic object which |
| 1608 | is not a function, we might allocate the symbol in our .dynbss section |
| 1609 | and allocate a COPY dynamic relocation. |
| 1610 | |
| 1611 | But PA64 code is canonically PIC, so as a rule we can avoid this sort |
| 1612 | of hackery. */ |
| 1613 | |
| 1614 | return true; |
| 1615 | } |
| 1616 | |
| 1617 | /* This function is called via elf_link_hash_traverse to mark millicode |
| 1618 | symbols with a dynindx of -1 and to remove the string table reference |
| 1619 | from the dynamic symbol table. If the symbol is not a millicode symbol, |
| 1620 | elf64_hppa_mark_exported_functions is called. */ |
| 1621 | |
| 1622 | static boolean |
| 1623 | elf64_hppa_mark_milli_and_exported_functions (h, data) |
| 1624 | struct elf_link_hash_entry *h; |
| 1625 | PTR data; |
| 1626 | { |
| 1627 | struct bfd_link_info *info = (struct bfd_link_info *)data; |
| 1628 | struct elf_link_hash_entry *elf = h; |
| 1629 | |
| 1630 | if (elf->root.type == bfd_link_hash_warning) |
| 1631 | elf = (struct elf_link_hash_entry *) elf->root.u.i.link; |
| 1632 | |
| 1633 | if (elf->type == STT_PARISC_MILLI) |
| 1634 | { |
| 1635 | if (elf->dynindx != -1) |
| 1636 | { |
| 1637 | elf->dynindx = -1; |
| 1638 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, |
| 1639 | elf->dynstr_index); |
| 1640 | } |
| 1641 | return true; |
| 1642 | } |
| 1643 | |
| 1644 | return elf64_hppa_mark_exported_functions (h, data); |
| 1645 | } |
| 1646 | |
| 1647 | /* Set the final sizes of the dynamic sections and allocate memory for |
| 1648 | the contents of our special sections. */ |
| 1649 | |
| 1650 | static boolean |
| 1651 | elf64_hppa_size_dynamic_sections (output_bfd, info) |
| 1652 | bfd *output_bfd; |
| 1653 | struct bfd_link_info *info; |
| 1654 | { |
| 1655 | bfd *dynobj; |
| 1656 | asection *s; |
| 1657 | boolean plt; |
| 1658 | boolean relocs; |
| 1659 | boolean reltext; |
| 1660 | struct elf64_hppa_allocate_data data; |
| 1661 | struct elf64_hppa_link_hash_table *hppa_info; |
| 1662 | |
| 1663 | hppa_info = elf64_hppa_hash_table (info); |
| 1664 | |
| 1665 | dynobj = elf_hash_table (info)->dynobj; |
| 1666 | BFD_ASSERT (dynobj != NULL); |
| 1667 | |
| 1668 | /* Mark each function this program exports so that we will allocate |
| 1669 | space in the .opd section for each function's FPTR. If we are |
| 1670 | creating dynamic sections, change the dynamic index of millicode |
| 1671 | symbols to -1 and remove them from the string table for .dynstr. |
| 1672 | |
| 1673 | We have to traverse the main linker hash table since we have to |
| 1674 | find functions which may not have been mentioned in any relocs. */ |
| 1675 | elf_link_hash_traverse (elf_hash_table (info), |
| 1676 | (elf_hash_table (info)->dynamic_sections_created |
| 1677 | ? elf64_hppa_mark_milli_and_exported_functions |
| 1678 | : elf64_hppa_mark_exported_functions), |
| 1679 | info); |
| 1680 | |
| 1681 | if (elf_hash_table (info)->dynamic_sections_created) |
| 1682 | { |
| 1683 | /* Set the contents of the .interp section to the interpreter. */ |
| 1684 | if (! info->shared) |
| 1685 | { |
| 1686 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 1687 | BFD_ASSERT (s != NULL); |
| 1688 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 1689 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 1690 | } |
| 1691 | } |
| 1692 | else |
| 1693 | { |
| 1694 | /* We may have created entries in the .rela.got section. |
| 1695 | However, if we are not creating the dynamic sections, we will |
| 1696 | not actually use these entries. Reset the size of .rela.dlt, |
| 1697 | which will cause it to get stripped from the output file |
| 1698 | below. */ |
| 1699 | s = bfd_get_section_by_name (dynobj, ".rela.dlt"); |
| 1700 | if (s != NULL) |
| 1701 | s->_raw_size = 0; |
| 1702 | } |
| 1703 | |
| 1704 | /* Allocate the GOT entries. */ |
| 1705 | |
| 1706 | data.info = info; |
| 1707 | if (elf64_hppa_hash_table (info)->dlt_sec) |
| 1708 | { |
| 1709 | data.ofs = 0x0; |
| 1710 | elf64_hppa_dyn_hash_traverse (&hppa_info->dyn_hash_table, |
| 1711 | allocate_global_data_dlt, &data); |
| 1712 | hppa_info->dlt_sec->_raw_size = data.ofs; |
| 1713 | |
| 1714 | data.ofs = 0x0; |
| 1715 | elf64_hppa_dyn_hash_traverse (&hppa_info->dyn_hash_table, |
| 1716 | allocate_global_data_plt, &data); |
| 1717 | hppa_info->plt_sec->_raw_size = data.ofs; |
| 1718 | |
| 1719 | data.ofs = 0x0; |
| 1720 | elf64_hppa_dyn_hash_traverse (&hppa_info->dyn_hash_table, |
| 1721 | allocate_global_data_stub, &data); |
| 1722 | hppa_info->stub_sec->_raw_size = data.ofs; |
| 1723 | } |
| 1724 | |
| 1725 | /* Allocate space for entries in the .opd section. */ |
| 1726 | if (elf64_hppa_hash_table (info)->opd_sec) |
| 1727 | { |
| 1728 | data.ofs = 0; |
| 1729 | elf64_hppa_dyn_hash_traverse (&hppa_info->dyn_hash_table, |
| 1730 | allocate_global_data_opd, &data); |
| 1731 | hppa_info->opd_sec->_raw_size = data.ofs; |
| 1732 | } |
| 1733 | |
| 1734 | /* Now allocate space for dynamic relocations, if necessary. */ |
| 1735 | if (hppa_info->root.dynamic_sections_created) |
| 1736 | elf64_hppa_dyn_hash_traverse (&hppa_info->dyn_hash_table, |
| 1737 | allocate_dynrel_entries, &data); |
| 1738 | |
| 1739 | /* The sizes of all the sections are set. Allocate memory for them. */ |
| 1740 | plt = false; |
| 1741 | relocs = false; |
| 1742 | reltext = false; |
| 1743 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 1744 | { |
| 1745 | const char *name; |
| 1746 | boolean strip; |
| 1747 | |
| 1748 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 1749 | continue; |
| 1750 | |
| 1751 | /* It's OK to base decisions on the section name, because none |
| 1752 | of the dynobj section names depend upon the input files. */ |
| 1753 | name = bfd_get_section_name (dynobj, s); |
| 1754 | |
| 1755 | strip = 0; |
| 1756 | |
| 1757 | if (strcmp (name, ".plt") == 0) |
| 1758 | { |
| 1759 | /* Strip this section if we don't need it; see the comment below. */ |
| 1760 | if (s->_raw_size == 0) |
| 1761 | { |
| 1762 | strip = true; |
| 1763 | } |
| 1764 | else |
| 1765 | { |
| 1766 | /* Remember whether there is a PLT. */ |
| 1767 | plt = true; |
| 1768 | } |
| 1769 | } |
| 1770 | else if (strcmp (name, ".dlt") == 0) |
| 1771 | { |
| 1772 | /* Strip this section if we don't need it; see the comment below. */ |
| 1773 | if (s->_raw_size == 0) |
| 1774 | { |
| 1775 | strip = true; |
| 1776 | } |
| 1777 | } |
| 1778 | else if (strcmp (name, ".opd") == 0) |
| 1779 | { |
| 1780 | /* Strip this section if we don't need it; see the comment below. */ |
| 1781 | if (s->_raw_size == 0) |
| 1782 | { |
| 1783 | strip = true; |
| 1784 | } |
| 1785 | } |
| 1786 | else if (strncmp (name, ".rela", 5) == 0) |
| 1787 | { |
| 1788 | /* If we don't need this section, strip it from the output file. |
| 1789 | This is mostly to handle .rela.bss and .rela.plt. We must |
| 1790 | create both sections in create_dynamic_sections, because they |
| 1791 | must be created before the linker maps input sections to output |
| 1792 | sections. The linker does that before adjust_dynamic_symbol |
| 1793 | is called, and it is that function which decides whether |
| 1794 | anything needs to go into these sections. */ |
| 1795 | if (s->_raw_size == 0) |
| 1796 | { |
| 1797 | /* If we don't need this section, strip it from the |
| 1798 | output file. This is mostly to handle .rela.bss and |
| 1799 | .rela.plt. We must create both sections in |
| 1800 | create_dynamic_sections, because they must be created |
| 1801 | before the linker maps input sections to output |
| 1802 | sections. The linker does that before |
| 1803 | adjust_dynamic_symbol is called, and it is that |
| 1804 | function which decides whether anything needs to go |
| 1805 | into these sections. */ |
| 1806 | strip = true; |
| 1807 | } |
| 1808 | else |
| 1809 | { |
| 1810 | asection *target; |
| 1811 | |
| 1812 | /* Remember whether there are any reloc sections other |
| 1813 | than .rela.plt. */ |
| 1814 | if (strcmp (name, ".rela.plt") != 0) |
| 1815 | { |
| 1816 | const char *outname; |
| 1817 | |
| 1818 | relocs = true; |
| 1819 | |
| 1820 | /* If this relocation section applies to a read only |
| 1821 | section, then we probably need a DT_TEXTREL |
| 1822 | entry. The entries in the .rela.plt section |
| 1823 | really apply to the .got section, which we |
| 1824 | created ourselves and so know is not readonly. */ |
| 1825 | outname = bfd_get_section_name (output_bfd, |
| 1826 | s->output_section); |
| 1827 | target = bfd_get_section_by_name (output_bfd, outname + 4); |
| 1828 | if (target != NULL |
| 1829 | && (target->flags & SEC_READONLY) != 0 |
| 1830 | && (target->flags & SEC_ALLOC) != 0) |
| 1831 | reltext = true; |
| 1832 | } |
| 1833 | |
| 1834 | /* We use the reloc_count field as a counter if we need |
| 1835 | to copy relocs into the output file. */ |
| 1836 | s->reloc_count = 0; |
| 1837 | } |
| 1838 | } |
| 1839 | else if (strncmp (name, ".dlt", 4) != 0 |
| 1840 | && strcmp (name, ".stub") != 0 |
| 1841 | && strcmp (name, ".got") != 0) |
| 1842 | { |
| 1843 | /* It's not one of our sections, so don't allocate space. */ |
| 1844 | continue; |
| 1845 | } |
| 1846 | |
| 1847 | if (strip) |
| 1848 | { |
| 1849 | _bfd_strip_section_from_output (info, s); |
| 1850 | continue; |
| 1851 | } |
| 1852 | |
| 1853 | /* Allocate memory for the section contents if it has not |
| 1854 | been allocated already. We use bfd_zalloc here in case |
| 1855 | unused entries are not reclaimed before the section's |
| 1856 | contents are written out. This should not happen, but this |
| 1857 | way if it does, we get a R_PARISC_NONE reloc instead of |
| 1858 | garbage. */ |
| 1859 | if (s->contents == NULL) |
| 1860 | { |
| 1861 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
| 1862 | if (s->contents == NULL && s->_raw_size != 0) |
| 1863 | return false; |
| 1864 | } |
| 1865 | } |
| 1866 | |
| 1867 | if (elf_hash_table (info)->dynamic_sections_created) |
| 1868 | { |
| 1869 | /* Always create a DT_PLTGOT. It actually has nothing to do with |
| 1870 | the PLT, it is how we communicate the __gp value of a load |
| 1871 | module to the dynamic linker. */ |
| 1872 | #define add_dynamic_entry(TAG, VAL) \ |
| 1873 | bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) |
| 1874 | |
| 1875 | if (!add_dynamic_entry (DT_HP_DLD_FLAGS, 0) |
| 1876 | || !add_dynamic_entry (DT_PLTGOT, 0)) |
| 1877 | return false; |
| 1878 | |
| 1879 | /* Add some entries to the .dynamic section. We fill in the |
| 1880 | values later, in elf64_hppa_finish_dynamic_sections, but we |
| 1881 | must add the entries now so that we get the correct size for |
| 1882 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 1883 | dynamic linker and used by the debugger. */ |
| 1884 | if (! info->shared) |
| 1885 | { |
| 1886 | if (!add_dynamic_entry (DT_DEBUG, 0) |
| 1887 | || !add_dynamic_entry (DT_HP_DLD_HOOK, 0) |
| 1888 | || !add_dynamic_entry (DT_HP_LOAD_MAP, 0)) |
| 1889 | return false; |
| 1890 | } |
| 1891 | |
| 1892 | if (plt) |
| 1893 | { |
| 1894 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) |
| 1895 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 1896 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 1897 | return false; |
| 1898 | } |
| 1899 | |
| 1900 | if (relocs) |
| 1901 | { |
| 1902 | if (!add_dynamic_entry (DT_RELA, 0) |
| 1903 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 1904 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) |
| 1905 | return false; |
| 1906 | } |
| 1907 | |
| 1908 | if (reltext) |
| 1909 | { |
| 1910 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 1911 | return false; |
| 1912 | info->flags |= DF_TEXTREL; |
| 1913 | } |
| 1914 | } |
| 1915 | #undef add_dynamic_entry |
| 1916 | |
| 1917 | return true; |
| 1918 | } |
| 1919 | |
| 1920 | /* Called after we have output the symbol into the dynamic symbol |
| 1921 | table, but before we output the symbol into the normal symbol |
| 1922 | table. |
| 1923 | |
| 1924 | For some symbols we had to change their address when outputting |
| 1925 | the dynamic symbol table. We undo that change here so that |
| 1926 | the symbols have their expected value in the normal symbol |
| 1927 | table. Ick. */ |
| 1928 | |
| 1929 | static boolean |
| 1930 | elf64_hppa_link_output_symbol_hook (abfd, info, name, sym, input_sec) |
| 1931 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1932 | struct bfd_link_info *info; |
| 1933 | const char *name; |
| 1934 | Elf_Internal_Sym *sym; |
| 1935 | asection *input_sec ATTRIBUTE_UNUSED; |
| 1936 | { |
| 1937 | struct elf64_hppa_link_hash_table *hppa_info; |
| 1938 | struct elf64_hppa_dyn_hash_entry *dyn_h; |
| 1939 | |
| 1940 | /* We may be called with the file symbol or section symbols. |
| 1941 | They never need munging, so it is safe to ignore them. */ |
| 1942 | if (!name) |
| 1943 | return true; |
| 1944 | |
| 1945 | /* Get the PA dyn_symbol (if any) associated with NAME. */ |
| 1946 | hppa_info = elf64_hppa_hash_table (info); |
| 1947 | dyn_h = elf64_hppa_dyn_hash_lookup (&hppa_info->dyn_hash_table, |
| 1948 | name, false, false); |
| 1949 | |
| 1950 | /* Function symbols for which we created .opd entries *may* have been |
| 1951 | munged by finish_dynamic_symbol and have to be un-munged here. |
| 1952 | |
| 1953 | Note that finish_dynamic_symbol sometimes turns dynamic symbols |
| 1954 | into non-dynamic ones, so we initialize st_shndx to -1 in |
| 1955 | mark_exported_functions and check to see if it was overwritten |
| 1956 | here instead of just checking dyn_h->h->dynindx. */ |
| 1957 | if (dyn_h && dyn_h->want_opd && dyn_h->st_shndx != -1) |
| 1958 | { |
| 1959 | /* Restore the saved value and section index. */ |
| 1960 | sym->st_value = dyn_h->st_value; |
| 1961 | sym->st_shndx = dyn_h->st_shndx; |
| 1962 | } |
| 1963 | |
| 1964 | return true; |
| 1965 | } |
| 1966 | |
| 1967 | /* Finish up dynamic symbol handling. We set the contents of various |
| 1968 | dynamic sections here. */ |
| 1969 | |
| 1970 | static boolean |
| 1971 | elf64_hppa_finish_dynamic_symbol (output_bfd, info, h, sym) |
| 1972 | bfd *output_bfd; |
| 1973 | struct bfd_link_info *info; |
| 1974 | struct elf_link_hash_entry *h; |
| 1975 | Elf_Internal_Sym *sym; |
| 1976 | { |
| 1977 | asection *stub, *splt, *sdlt, *sopd, *spltrel, *sdltrel; |
| 1978 | struct elf64_hppa_link_hash_table *hppa_info; |
| 1979 | struct elf64_hppa_dyn_hash_entry *dyn_h; |
| 1980 | |
| 1981 | hppa_info = elf64_hppa_hash_table (info); |
| 1982 | dyn_h = elf64_hppa_dyn_hash_lookup (&hppa_info->dyn_hash_table, |
| 1983 | h->root.root.string, false, false); |
| 1984 | |
| 1985 | stub = hppa_info->stub_sec; |
| 1986 | splt = hppa_info->plt_sec; |
| 1987 | sdlt = hppa_info->dlt_sec; |
| 1988 | sopd = hppa_info->opd_sec; |
| 1989 | spltrel = hppa_info->plt_rel_sec; |
| 1990 | sdltrel = hppa_info->dlt_rel_sec; |
| 1991 | |
| 1992 | /* Incredible. It is actually necessary to NOT use the symbol's real |
| 1993 | value when building the dynamic symbol table for a shared library. |
| 1994 | At least for symbols that refer to functions. |
| 1995 | |
| 1996 | We will store a new value and section index into the symbol long |
| 1997 | enough to output it into the dynamic symbol table, then we restore |
| 1998 | the original values (in elf64_hppa_link_output_symbol_hook). */ |
| 1999 | if (dyn_h && dyn_h->want_opd) |
| 2000 | { |
| 2001 | BFD_ASSERT (sopd != NULL) |
| 2002 | |
| 2003 | /* Save away the original value and section index so that we |
| 2004 | can restore them later. */ |
| 2005 | dyn_h->st_value = sym->st_value; |
| 2006 | dyn_h->st_shndx = sym->st_shndx; |
| 2007 | |
| 2008 | /* For the dynamic symbol table entry, we want the value to be |
| 2009 | address of this symbol's entry within the .opd section. */ |
| 2010 | sym->st_value = (dyn_h->opd_offset |
| 2011 | + sopd->output_offset |
| 2012 | + sopd->output_section->vma); |
| 2013 | sym->st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, |
| 2014 | sopd->output_section); |
| 2015 | } |
| 2016 | |
| 2017 | /* Initialize a .plt entry if requested. */ |
| 2018 | if (dyn_h && dyn_h->want_plt |
| 2019 | && elf64_hppa_dynamic_symbol_p (dyn_h->h, info)) |
| 2020 | { |
| 2021 | bfd_vma value; |
| 2022 | Elf_Internal_Rela rel; |
| 2023 | |
| 2024 | BFD_ASSERT (splt != NULL && spltrel != NULL) |
| 2025 | |
| 2026 | /* We do not actually care about the value in the PLT entry |
| 2027 | if we are creating a shared library and the symbol is |
| 2028 | still undefined, we create a dynamic relocation to fill |
| 2029 | in the correct value. */ |
| 2030 | if (info->shared && h->root.type == bfd_link_hash_undefined) |
| 2031 | value = 0; |
| 2032 | else |
| 2033 | value = (h->root.u.def.value + h->root.u.def.section->vma); |
| 2034 | |
| 2035 | /* Fill in the entry in the procedure linkage table. |
| 2036 | |
| 2037 | The format of a plt entry is |
| 2038 | <funcaddr> <__gp>. |
| 2039 | |
| 2040 | plt_offset is the offset within the PLT section at which to |
| 2041 | install the PLT entry. |
| 2042 | |
| 2043 | We are modifying the in-memory PLT contents here, so we do not add |
| 2044 | in the output_offset of the PLT section. */ |
| 2045 | |
| 2046 | bfd_put_64 (splt->owner, value, splt->contents + dyn_h->plt_offset); |
| 2047 | value = _bfd_get_gp_value (splt->output_section->owner); |
| 2048 | bfd_put_64 (splt->owner, value, splt->contents + dyn_h->plt_offset + 0x8); |
| 2049 | |
| 2050 | /* Create a dynamic IPLT relocation for this entry. |
| 2051 | |
| 2052 | We are creating a relocation in the output file's PLT section, |
| 2053 | which is included within the DLT secton. So we do need to include |
| 2054 | the PLT's output_offset in the computation of the relocation's |
| 2055 | address. */ |
| 2056 | rel.r_offset = (dyn_h->plt_offset + splt->output_offset |
| 2057 | + splt->output_section->vma); |
| 2058 | rel.r_info = ELF64_R_INFO (h->dynindx, R_PARISC_IPLT); |
| 2059 | rel.r_addend = 0; |
| 2060 | |
| 2061 | bfd_elf64_swap_reloca_out (splt->output_section->owner, &rel, |
| 2062 | (((Elf64_External_Rela *) |
| 2063 | spltrel->contents) |
| 2064 | + spltrel->reloc_count)); |
| 2065 | spltrel->reloc_count++; |
| 2066 | } |
| 2067 | |
| 2068 | /* Initialize an external call stub entry if requested. */ |
| 2069 | if (dyn_h && dyn_h->want_stub |
| 2070 | && elf64_hppa_dynamic_symbol_p (dyn_h->h, info)) |
| 2071 | { |
| 2072 | bfd_vma value; |
| 2073 | int insn; |
| 2074 | unsigned int max_offset; |
| 2075 | |
| 2076 | BFD_ASSERT (stub != NULL) |
| 2077 | |
| 2078 | /* Install the generic stub template. |
| 2079 | |
| 2080 | We are modifying the contents of the stub section, so we do not |
| 2081 | need to include the stub section's output_offset here. */ |
| 2082 | memcpy (stub->contents + dyn_h->stub_offset, plt_stub, sizeof (plt_stub)); |
| 2083 | |
| 2084 | /* Fix up the first ldd instruction. |
| 2085 | |
| 2086 | We are modifying the contents of the STUB section in memory, |
| 2087 | so we do not need to include its output offset in this computation. |
| 2088 | |
| 2089 | Note the plt_offset value is the value of the PLT entry relative to |
| 2090 | the start of the PLT section. These instructions will reference |
| 2091 | data relative to the value of __gp, which may not necessarily have |
| 2092 | the same address as the start of the PLT section. |
| 2093 | |
| 2094 | gp_offset contains the offset of __gp within the PLT section. */ |
| 2095 | value = dyn_h->plt_offset - hppa_info->gp_offset; |
| 2096 | |
| 2097 | insn = bfd_get_32 (stub->owner, stub->contents + dyn_h->stub_offset); |
| 2098 | if (output_bfd->arch_info->mach >= 25) |
| 2099 | { |
| 2100 | /* Wide mode allows 16 bit offsets. */ |
| 2101 | max_offset = 32768; |
| 2102 | insn &= ~ 0xfff1; |
| 2103 | insn |= re_assemble_16 ((int) value); |
| 2104 | } |
| 2105 | else |
| 2106 | { |
| 2107 | max_offset = 8192; |
| 2108 | insn &= ~ 0x3ff1; |
| 2109 | insn |= re_assemble_14 ((int) value); |
| 2110 | } |
| 2111 | |
| 2112 | if ((value & 7) || value + max_offset >= 2*max_offset - 8) |
| 2113 | { |
| 2114 | (*_bfd_error_handler) (_("stub entry for %s cannot load .plt, dp offset = %ld"), |
| 2115 | dyn_h->root.string, |
| 2116 | (long) value); |
| 2117 | return false; |
| 2118 | } |
| 2119 | |
| 2120 | bfd_put_32 (stub->owner, (bfd_vma) insn, |
| 2121 | stub->contents + dyn_h->stub_offset); |
| 2122 | |
| 2123 | /* Fix up the second ldd instruction. */ |
| 2124 | value += 8; |
| 2125 | insn = bfd_get_32 (stub->owner, stub->contents + dyn_h->stub_offset + 8); |
| 2126 | if (output_bfd->arch_info->mach >= 25) |
| 2127 | { |
| 2128 | insn &= ~ 0xfff1; |
| 2129 | insn |= re_assemble_16 ((int) value); |
| 2130 | } |
| 2131 | else |
| 2132 | { |
| 2133 | insn &= ~ 0x3ff1; |
| 2134 | insn |= re_assemble_14 ((int) value); |
| 2135 | } |
| 2136 | bfd_put_32 (stub->owner, (bfd_vma) insn, |
| 2137 | stub->contents + dyn_h->stub_offset + 8); |
| 2138 | } |
| 2139 | |
| 2140 | return true; |
| 2141 | } |
| 2142 | |
| 2143 | /* The .opd section contains FPTRs for each function this file |
| 2144 | exports. Initialize the FPTR entries. */ |
| 2145 | |
| 2146 | static boolean |
| 2147 | elf64_hppa_finalize_opd (dyn_h, data) |
| 2148 | struct elf64_hppa_dyn_hash_entry *dyn_h; |
| 2149 | PTR data; |
| 2150 | { |
| 2151 | struct bfd_link_info *info = (struct bfd_link_info *)data; |
| 2152 | struct elf64_hppa_link_hash_table *hppa_info; |
| 2153 | struct elf_link_hash_entry *h = dyn_h ? dyn_h->h : NULL; |
| 2154 | asection *sopd; |
| 2155 | asection *sopdrel; |
| 2156 | |
| 2157 | hppa_info = elf64_hppa_hash_table (info); |
| 2158 | sopd = hppa_info->opd_sec; |
| 2159 | sopdrel = hppa_info->opd_rel_sec; |
| 2160 | |
| 2161 | if (h && dyn_h->want_opd) |
| 2162 | { |
| 2163 | bfd_vma value; |
| 2164 | |
| 2165 | /* The first two words of an .opd entry are zero. |
| 2166 | |
| 2167 | We are modifying the contents of the OPD section in memory, so we |
| 2168 | do not need to include its output offset in this computation. */ |
| 2169 | memset (sopd->contents + dyn_h->opd_offset, 0, 16); |
| 2170 | |
| 2171 | value = (h->root.u.def.value |
| 2172 | + h->root.u.def.section->output_section->vma |
| 2173 | + h->root.u.def.section->output_offset); |
| 2174 | |
| 2175 | /* The next word is the address of the function. */ |
| 2176 | bfd_put_64 (sopd->owner, value, sopd->contents + dyn_h->opd_offset + 16); |
| 2177 | |
| 2178 | /* The last word is our local __gp value. */ |
| 2179 | value = _bfd_get_gp_value (sopd->output_section->owner); |
| 2180 | bfd_put_64 (sopd->owner, value, sopd->contents + dyn_h->opd_offset + 24); |
| 2181 | } |
| 2182 | |
| 2183 | /* If we are generating a shared library, we must generate EPLT relocations |
| 2184 | for each entry in the .opd, even for static functions (they may have |
| 2185 | had their address taken). */ |
| 2186 | if (info->shared && dyn_h && dyn_h->want_opd) |
| 2187 | { |
| 2188 | Elf64_Internal_Rela rel; |
| 2189 | int dynindx; |
| 2190 | |
| 2191 | /* We may need to do a relocation against a local symbol, in |
| 2192 | which case we have to look up it's dynamic symbol index off |
| 2193 | the local symbol hash table. */ |
| 2194 | if (h && h->dynindx != -1) |
| 2195 | dynindx = h->dynindx; |
| 2196 | else |
| 2197 | dynindx |
| 2198 | = _bfd_elf_link_lookup_local_dynindx (info, dyn_h->owner, |
| 2199 | dyn_h->sym_indx); |
| 2200 | |
| 2201 | /* The offset of this relocation is the absolute address of the |
| 2202 | .opd entry for this symbol. */ |
| 2203 | rel.r_offset = (dyn_h->opd_offset + sopd->output_offset |
| 2204 | + sopd->output_section->vma); |
| 2205 | |
| 2206 | /* If H is non-null, then we have an external symbol. |
| 2207 | |
| 2208 | It is imperative that we use a different dynamic symbol for the |
| 2209 | EPLT relocation if the symbol has global scope. |
| 2210 | |
| 2211 | In the dynamic symbol table, the function symbol will have a value |
| 2212 | which is address of the function's .opd entry. |
| 2213 | |
| 2214 | Thus, we can not use that dynamic symbol for the EPLT relocation |
| 2215 | (if we did, the data in the .opd would reference itself rather |
| 2216 | than the actual address of the function). Instead we have to use |
| 2217 | a new dynamic symbol which has the same value as the original global |
| 2218 | function symbol. |
| 2219 | |
| 2220 | We prefix the original symbol with a "." and use the new symbol in |
| 2221 | the EPLT relocation. This new symbol has already been recorded in |
| 2222 | the symbol table, we just have to look it up and use it. |
| 2223 | |
| 2224 | We do not have such problems with static functions because we do |
| 2225 | not make their addresses in the dynamic symbol table point to |
| 2226 | the .opd entry. Ultimately this should be safe since a static |
| 2227 | function can not be directly referenced outside of its shared |
| 2228 | library. |
| 2229 | |
| 2230 | We do have to play similar games for FPTR relocations in shared |
| 2231 | libraries, including those for static symbols. See the FPTR |
| 2232 | handling in elf64_hppa_finalize_dynreloc. */ |
| 2233 | if (h) |
| 2234 | { |
| 2235 | char *new_name; |
| 2236 | struct elf_link_hash_entry *nh; |
| 2237 | |
| 2238 | new_name = alloca (strlen (h->root.root.string) + 2); |
| 2239 | new_name[0] = '.'; |
| 2240 | strcpy (new_name + 1, h->root.root.string); |
| 2241 | |
| 2242 | nh = elf_link_hash_lookup (elf_hash_table (info), |
| 2243 | new_name, false, false, false); |
| 2244 | |
| 2245 | /* All we really want from the new symbol is its dynamic |
| 2246 | symbol index. */ |
| 2247 | dynindx = nh->dynindx; |
| 2248 | } |
| 2249 | |
| 2250 | rel.r_addend = 0; |
| 2251 | rel.r_info = ELF64_R_INFO (dynindx, R_PARISC_EPLT); |
| 2252 | |
| 2253 | bfd_elf64_swap_reloca_out (sopd->output_section->owner, &rel, |
| 2254 | (((Elf64_External_Rela *) |
| 2255 | sopdrel->contents) |
| 2256 | + sopdrel->reloc_count)); |
| 2257 | sopdrel->reloc_count++; |
| 2258 | } |
| 2259 | return true; |
| 2260 | } |
| 2261 | |
| 2262 | /* The .dlt section contains addresses for items referenced through the |
| 2263 | dlt. Note that we can have a DLTIND relocation for a local symbol, thus |
| 2264 | we can not depend on finish_dynamic_symbol to initialize the .dlt. */ |
| 2265 | |
| 2266 | static boolean |
| 2267 | elf64_hppa_finalize_dlt (dyn_h, data) |
| 2268 | struct elf64_hppa_dyn_hash_entry *dyn_h; |
| 2269 | PTR data; |
| 2270 | { |
| 2271 | struct bfd_link_info *info = (struct bfd_link_info *)data; |
| 2272 | struct elf64_hppa_link_hash_table *hppa_info; |
| 2273 | asection *sdlt, *sdltrel; |
| 2274 | struct elf_link_hash_entry *h = dyn_h ? dyn_h->h : NULL; |
| 2275 | |
| 2276 | hppa_info = elf64_hppa_hash_table (info); |
| 2277 | |
| 2278 | sdlt = hppa_info->dlt_sec; |
| 2279 | sdltrel = hppa_info->dlt_rel_sec; |
| 2280 | |
| 2281 | /* H/DYN_H may refer to a local variable and we know it's |
| 2282 | address, so there is no need to create a relocation. Just install |
| 2283 | the proper value into the DLT, note this shortcut can not be |
| 2284 | skipped when building a shared library. */ |
| 2285 | if (! info->shared && h && dyn_h->want_dlt) |
| 2286 | { |
| 2287 | bfd_vma value; |
| 2288 | |
| 2289 | /* If we had an LTOFF_FPTR style relocation we want the DLT entry |
| 2290 | to point to the FPTR entry in the .opd section. |
| 2291 | |
| 2292 | We include the OPD's output offset in this computation as |
| 2293 | we are referring to an absolute address in the resulting |
| 2294 | object file. */ |
| 2295 | if (dyn_h->want_opd) |
| 2296 | { |
| 2297 | value = (dyn_h->opd_offset |
| 2298 | + hppa_info->opd_sec->output_offset |
| 2299 | + hppa_info->opd_sec->output_section->vma); |
| 2300 | } |
| 2301 | else if (h->root.u.def.section) |
| 2302 | { |
| 2303 | value = h->root.u.def.value + h->root.u.def.section->output_offset; |
| 2304 | if (h->root.u.def.section->output_section) |
| 2305 | value += h->root.u.def.section->output_section->vma; |
| 2306 | else |
| 2307 | value += h->root.u.def.section->vma; |
| 2308 | } |
| 2309 | else |
| 2310 | /* We have an undefined function reference. */ |
| 2311 | value = 0; |
| 2312 | |
| 2313 | /* We do not need to include the output offset of the DLT section |
| 2314 | here because we are modifying the in-memory contents. */ |
| 2315 | bfd_put_64 (sdlt->owner, value, sdlt->contents + dyn_h->dlt_offset); |
| 2316 | } |
| 2317 | |
| 2318 | /* Create a relocation for the DLT entry assocated with this symbol. |
| 2319 | When building a shared library the symbol does not have to be dynamic. */ |
| 2320 | if (dyn_h->want_dlt |
| 2321 | && (elf64_hppa_dynamic_symbol_p (dyn_h->h, info) || info->shared)) |
| 2322 | { |
| 2323 | Elf64_Internal_Rela rel; |
| 2324 | int dynindx; |
| 2325 | |
| 2326 | /* We may need to do a relocation against a local symbol, in |
| 2327 | which case we have to look up it's dynamic symbol index off |
| 2328 | the local symbol hash table. */ |
| 2329 | if (h && h->dynindx != -1) |
| 2330 | dynindx = h->dynindx; |
| 2331 | else |
| 2332 | dynindx |
| 2333 | = _bfd_elf_link_lookup_local_dynindx (info, dyn_h->owner, |
| 2334 | dyn_h->sym_indx); |
| 2335 | |
| 2336 | /* Create a dynamic relocation for this entry. Do include the output |
| 2337 | offset of the DLT entry since we need an absolute address in the |
| 2338 | resulting object file. */ |
| 2339 | rel.r_offset = (dyn_h->dlt_offset + sdlt->output_offset |
| 2340 | + sdlt->output_section->vma); |
| 2341 | if (h && h->type == STT_FUNC) |
| 2342 | rel.r_info = ELF64_R_INFO (dynindx, R_PARISC_FPTR64); |
| 2343 | else |
| 2344 | rel.r_info = ELF64_R_INFO (dynindx, R_PARISC_DIR64); |
| 2345 | rel.r_addend = 0; |
| 2346 | |
| 2347 | bfd_elf64_swap_reloca_out (sdlt->output_section->owner, &rel, |
| 2348 | (((Elf64_External_Rela *) |
| 2349 | sdltrel->contents) |
| 2350 | + sdltrel->reloc_count)); |
| 2351 | sdltrel->reloc_count++; |
| 2352 | } |
| 2353 | return true; |
| 2354 | } |
| 2355 | |
| 2356 | /* Finalize the dynamic relocations. Specifically the FPTR relocations |
| 2357 | for dynamic functions used to initialize static data. */ |
| 2358 | |
| 2359 | static boolean |
| 2360 | elf64_hppa_finalize_dynreloc (dyn_h, data) |
| 2361 | struct elf64_hppa_dyn_hash_entry *dyn_h; |
| 2362 | PTR data; |
| 2363 | { |
| 2364 | struct bfd_link_info *info = (struct bfd_link_info *)data; |
| 2365 | struct elf64_hppa_link_hash_table *hppa_info; |
| 2366 | struct elf_link_hash_entry *h; |
| 2367 | int dynamic_symbol; |
| 2368 | |
| 2369 | dynamic_symbol = elf64_hppa_dynamic_symbol_p (dyn_h->h, info); |
| 2370 | |
| 2371 | if (!dynamic_symbol && !info->shared) |
| 2372 | return true; |
| 2373 | |
| 2374 | if (dyn_h->reloc_entries) |
| 2375 | { |
| 2376 | struct elf64_hppa_dyn_reloc_entry *rent; |
| 2377 | int dynindx; |
| 2378 | |
| 2379 | hppa_info = elf64_hppa_hash_table (info); |
| 2380 | h = dyn_h->h; |
| 2381 | |
| 2382 | /* We may need to do a relocation against a local symbol, in |
| 2383 | which case we have to look up it's dynamic symbol index off |
| 2384 | the local symbol hash table. */ |
| 2385 | if (h && h->dynindx != -1) |
| 2386 | dynindx = h->dynindx; |
| 2387 | else |
| 2388 | dynindx |
| 2389 | = _bfd_elf_link_lookup_local_dynindx (info, dyn_h->owner, |
| 2390 | dyn_h->sym_indx); |
| 2391 | |
| 2392 | for (rent = dyn_h->reloc_entries; rent; rent = rent->next) |
| 2393 | { |
| 2394 | Elf64_Internal_Rela rel; |
| 2395 | |
| 2396 | /* Allocate one iff we are building a shared library, the relocation |
| 2397 | isn't a R_PARISC_FPTR64, or we don't want an opd entry. */ |
| 2398 | if (!info->shared && rent->type == R_PARISC_FPTR64 && dyn_h->want_opd) |
| 2399 | continue; |
| 2400 | |
| 2401 | /* Create a dynamic relocation for this entry. |
| 2402 | |
| 2403 | We need the output offset for the reloc's section because |
| 2404 | we are creating an absolute address in the resulting object |
| 2405 | file. */ |
| 2406 | rel.r_offset = (rent->offset + rent->sec->output_offset |
| 2407 | + rent->sec->output_section->vma); |
| 2408 | |
| 2409 | /* An FPTR64 relocation implies that we took the address of |
| 2410 | a function and that the function has an entry in the .opd |
| 2411 | section. We want the FPTR64 relocation to reference the |
| 2412 | entry in .opd. |
| 2413 | |
| 2414 | We could munge the symbol value in the dynamic symbol table |
| 2415 | (in fact we already do for functions with global scope) to point |
| 2416 | to the .opd entry. Then we could use that dynamic symbol in |
| 2417 | this relocation. |
| 2418 | |
| 2419 | Or we could do something sensible, not munge the symbol's |
| 2420 | address and instead just use a different symbol to reference |
| 2421 | the .opd entry. At least that seems sensible until you |
| 2422 | realize there's no local dynamic symbols we can use for that |
| 2423 | purpose. Thus the hair in the check_relocs routine. |
| 2424 | |
| 2425 | We use a section symbol recorded by check_relocs as the |
| 2426 | base symbol for the relocation. The addend is the difference |
| 2427 | between the section symbol and the address of the .opd entry. */ |
| 2428 | if (info->shared && rent->type == R_PARISC_FPTR64 && dyn_h->want_opd) |
| 2429 | { |
| 2430 | bfd_vma value, value2; |
| 2431 | |
| 2432 | /* First compute the address of the opd entry for this symbol. */ |
| 2433 | value = (dyn_h->opd_offset |
| 2434 | + hppa_info->opd_sec->output_section->vma |
| 2435 | + hppa_info->opd_sec->output_offset); |
| 2436 | |
| 2437 | /* Compute the value of the start of the section with |
| 2438 | the relocation. */ |
| 2439 | value2 = (rent->sec->output_section->vma |
| 2440 | + rent->sec->output_offset); |
| 2441 | |
| 2442 | /* Compute the difference between the start of the section |
| 2443 | with the relocation and the opd entry. */ |
| 2444 | value -= value2; |
| 2445 | |
| 2446 | /* The result becomes the addend of the relocation. */ |
| 2447 | rel.r_addend = value; |
| 2448 | |
| 2449 | /* The section symbol becomes the symbol for the dynamic |
| 2450 | relocation. */ |
| 2451 | dynindx |
| 2452 | = _bfd_elf_link_lookup_local_dynindx (info, |
| 2453 | rent->sec->owner, |
| 2454 | rent->sec_symndx); |
| 2455 | } |
| 2456 | else |
| 2457 | rel.r_addend = rent->addend; |
| 2458 | |
| 2459 | rel.r_info = ELF64_R_INFO (dynindx, rent->type); |
| 2460 | |
| 2461 | bfd_elf64_swap_reloca_out (hppa_info->other_rel_sec->output_section->owner, |
| 2462 | &rel, |
| 2463 | (((Elf64_External_Rela *) |
| 2464 | hppa_info->other_rel_sec->contents) |
| 2465 | + hppa_info->other_rel_sec->reloc_count)); |
| 2466 | hppa_info->other_rel_sec->reloc_count++; |
| 2467 | } |
| 2468 | } |
| 2469 | |
| 2470 | return true; |
| 2471 | } |
| 2472 | |
| 2473 | /* Finish up the dynamic sections. */ |
| 2474 | |
| 2475 | static boolean |
| 2476 | elf64_hppa_finish_dynamic_sections (output_bfd, info) |
| 2477 | bfd *output_bfd; |
| 2478 | struct bfd_link_info *info; |
| 2479 | { |
| 2480 | bfd *dynobj; |
| 2481 | asection *sdyn; |
| 2482 | struct elf64_hppa_link_hash_table *hppa_info; |
| 2483 | |
| 2484 | hppa_info = elf64_hppa_hash_table (info); |
| 2485 | |
| 2486 | /* Finalize the contents of the .opd section. */ |
| 2487 | elf64_hppa_dyn_hash_traverse (&hppa_info->dyn_hash_table, |
| 2488 | elf64_hppa_finalize_opd, |
| 2489 | info); |
| 2490 | |
| 2491 | elf64_hppa_dyn_hash_traverse (&hppa_info->dyn_hash_table, |
| 2492 | elf64_hppa_finalize_dynreloc, |
| 2493 | info); |
| 2494 | |
| 2495 | /* Finalize the contents of the .dlt section. */ |
| 2496 | dynobj = elf_hash_table (info)->dynobj; |
| 2497 | /* Finalize the contents of the .dlt section. */ |
| 2498 | elf64_hppa_dyn_hash_traverse (&hppa_info->dyn_hash_table, |
| 2499 | elf64_hppa_finalize_dlt, |
| 2500 | info); |
| 2501 | |
| 2502 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 2503 | |
| 2504 | if (elf_hash_table (info)->dynamic_sections_created) |
| 2505 | { |
| 2506 | Elf64_External_Dyn *dyncon, *dynconend; |
| 2507 | |
| 2508 | BFD_ASSERT (sdyn != NULL); |
| 2509 | |
| 2510 | dyncon = (Elf64_External_Dyn *) sdyn->contents; |
| 2511 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| 2512 | for (; dyncon < dynconend; dyncon++) |
| 2513 | { |
| 2514 | Elf_Internal_Dyn dyn; |
| 2515 | asection *s; |
| 2516 | |
| 2517 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
| 2518 | |
| 2519 | switch (dyn.d_tag) |
| 2520 | { |
| 2521 | default: |
| 2522 | break; |
| 2523 | |
| 2524 | case DT_HP_LOAD_MAP: |
| 2525 | /* Compute the absolute address of 16byte scratchpad area |
| 2526 | for the dynamic linker. |
| 2527 | |
| 2528 | By convention the linker script will allocate the scratchpad |
| 2529 | area at the start of the .data section. So all we have to |
| 2530 | to is find the start of the .data section. */ |
| 2531 | s = bfd_get_section_by_name (output_bfd, ".data"); |
| 2532 | dyn.d_un.d_ptr = s->vma; |
| 2533 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2534 | break; |
| 2535 | |
| 2536 | case DT_PLTGOT: |
| 2537 | /* HP's use PLTGOT to set the GOT register. */ |
| 2538 | dyn.d_un.d_ptr = _bfd_get_gp_value (output_bfd); |
| 2539 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2540 | break; |
| 2541 | |
| 2542 | case DT_JMPREL: |
| 2543 | s = hppa_info->plt_rel_sec; |
| 2544 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 2545 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2546 | break; |
| 2547 | |
| 2548 | case DT_PLTRELSZ: |
| 2549 | s = hppa_info->plt_rel_sec; |
| 2550 | dyn.d_un.d_val = s->_raw_size; |
| 2551 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2552 | break; |
| 2553 | |
| 2554 | case DT_RELA: |
| 2555 | s = hppa_info->other_rel_sec; |
| 2556 | if (! s) |
| 2557 | s = hppa_info->dlt_rel_sec; |
| 2558 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 2559 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2560 | break; |
| 2561 | |
| 2562 | case DT_RELASZ: |
| 2563 | s = hppa_info->other_rel_sec; |
| 2564 | dyn.d_un.d_val = s->_raw_size; |
| 2565 | s = hppa_info->dlt_rel_sec; |
| 2566 | dyn.d_un.d_val += s->_raw_size; |
| 2567 | s = hppa_info->opd_rel_sec; |
| 2568 | dyn.d_un.d_val += s->_raw_size; |
| 2569 | /* There is some question about whether or not the size of |
| 2570 | the PLT relocs should be included here. HP's tools do |
| 2571 | it, so we'll emulate them. */ |
| 2572 | s = hppa_info->plt_rel_sec; |
| 2573 | dyn.d_un.d_val += s->_raw_size; |
| 2574 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2575 | break; |
| 2576 | |
| 2577 | } |
| 2578 | } |
| 2579 | } |
| 2580 | |
| 2581 | return true; |
| 2582 | } |
| 2583 | |
| 2584 | /* Return the number of additional phdrs we will need. |
| 2585 | |
| 2586 | The generic ELF code only creates PT_PHDRs for executables. The HP |
| 2587 | dynamic linker requires PT_PHDRs for dynamic libraries too. |
| 2588 | |
| 2589 | This routine indicates that the backend needs one additional program |
| 2590 | header for that case. |
| 2591 | |
| 2592 | Note we do not have access to the link info structure here, so we have |
| 2593 | to guess whether or not we are building a shared library based on the |
| 2594 | existence of a .interp section. */ |
| 2595 | |
| 2596 | static int |
| 2597 | elf64_hppa_additional_program_headers (abfd) |
| 2598 | bfd *abfd; |
| 2599 | { |
| 2600 | asection *s; |
| 2601 | |
| 2602 | /* If we are creating a shared library, then we have to create a |
| 2603 | PT_PHDR segment. HP's dynamic linker chokes without it. */ |
| 2604 | s = bfd_get_section_by_name (abfd, ".interp"); |
| 2605 | if (! s) |
| 2606 | return 1; |
| 2607 | return 0; |
| 2608 | } |
| 2609 | |
| 2610 | /* Allocate and initialize any program headers required by this |
| 2611 | specific backend. |
| 2612 | |
| 2613 | The generic ELF code only creates PT_PHDRs for executables. The HP |
| 2614 | dynamic linker requires PT_PHDRs for dynamic libraries too. |
| 2615 | |
| 2616 | This allocates the PT_PHDR and initializes it in a manner suitable |
| 2617 | for the HP linker. |
| 2618 | |
| 2619 | Note we do not have access to the link info structure here, so we have |
| 2620 | to guess whether or not we are building a shared library based on the |
| 2621 | existence of a .interp section. */ |
| 2622 | |
| 2623 | static boolean |
| 2624 | elf64_hppa_modify_segment_map (abfd) |
| 2625 | bfd *abfd; |
| 2626 | { |
| 2627 | struct elf_segment_map *m; |
| 2628 | asection *s; |
| 2629 | |
| 2630 | s = bfd_get_section_by_name (abfd, ".interp"); |
| 2631 | if (! s) |
| 2632 | { |
| 2633 | for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) |
| 2634 | if (m->p_type == PT_PHDR) |
| 2635 | break; |
| 2636 | if (m == NULL) |
| 2637 | { |
| 2638 | m = ((struct elf_segment_map *) |
| 2639 | bfd_zalloc (abfd, (bfd_size_type) sizeof *m)); |
| 2640 | if (m == NULL) |
| 2641 | return false; |
| 2642 | |
| 2643 | m->p_type = PT_PHDR; |
| 2644 | m->p_flags = PF_R | PF_X; |
| 2645 | m->p_flags_valid = 1; |
| 2646 | m->p_paddr_valid = 1; |
| 2647 | m->includes_phdrs = 1; |
| 2648 | |
| 2649 | m->next = elf_tdata (abfd)->segment_map; |
| 2650 | elf_tdata (abfd)->segment_map = m; |
| 2651 | } |
| 2652 | } |
| 2653 | |
| 2654 | for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) |
| 2655 | if (m->p_type == PT_LOAD) |
| 2656 | { |
| 2657 | unsigned int i; |
| 2658 | |
| 2659 | for (i = 0; i < m->count; i++) |
| 2660 | { |
| 2661 | /* The code "hint" is not really a hint. It is a requirement |
| 2662 | for certain versions of the HP dynamic linker. Worse yet, |
| 2663 | it must be set even if the shared library does not have |
| 2664 | any code in its "text" segment (thus the check for .hash |
| 2665 | to catch this situation). */ |
| 2666 | if (m->sections[i]->flags & SEC_CODE |
| 2667 | || (strcmp (m->sections[i]->name, ".hash") == 0)) |
| 2668 | m->p_flags |= (PF_X | PF_HP_CODE); |
| 2669 | } |
| 2670 | } |
| 2671 | |
| 2672 | return true; |
| 2673 | } |
| 2674 | |
| 2675 | /* Called when writing out an object file to decide the type of a |
| 2676 | symbol. */ |
| 2677 | static int |
| 2678 | elf64_hppa_elf_get_symbol_type (elf_sym, type) |
| 2679 | Elf_Internal_Sym *elf_sym; |
| 2680 | int type; |
| 2681 | { |
| 2682 | if (ELF_ST_TYPE (elf_sym->st_info) == STT_PARISC_MILLI) |
| 2683 | return STT_PARISC_MILLI; |
| 2684 | else |
| 2685 | return type; |
| 2686 | } |
| 2687 | |
| 2688 | /* The hash bucket size is the standard one, namely 4. */ |
| 2689 | |
| 2690 | const struct elf_size_info hppa64_elf_size_info = |
| 2691 | { |
| 2692 | sizeof (Elf64_External_Ehdr), |
| 2693 | sizeof (Elf64_External_Phdr), |
| 2694 | sizeof (Elf64_External_Shdr), |
| 2695 | sizeof (Elf64_External_Rel), |
| 2696 | sizeof (Elf64_External_Rela), |
| 2697 | sizeof (Elf64_External_Sym), |
| 2698 | sizeof (Elf64_External_Dyn), |
| 2699 | sizeof (Elf_External_Note), |
| 2700 | 4, |
| 2701 | 1, |
| 2702 | 64, 8, |
| 2703 | ELFCLASS64, EV_CURRENT, |
| 2704 | bfd_elf64_write_out_phdrs, |
| 2705 | bfd_elf64_write_shdrs_and_ehdr, |
| 2706 | bfd_elf64_write_relocs, |
| 2707 | bfd_elf64_swap_symbol_in, |
| 2708 | bfd_elf64_swap_symbol_out, |
| 2709 | bfd_elf64_slurp_reloc_table, |
| 2710 | bfd_elf64_slurp_symbol_table, |
| 2711 | bfd_elf64_swap_dyn_in, |
| 2712 | bfd_elf64_swap_dyn_out, |
| 2713 | NULL, |
| 2714 | NULL, |
| 2715 | NULL, |
| 2716 | NULL |
| 2717 | }; |
| 2718 | |
| 2719 | #define TARGET_BIG_SYM bfd_elf64_hppa_vec |
| 2720 | #define TARGET_BIG_NAME "elf64-hppa" |
| 2721 | #define ELF_ARCH bfd_arch_hppa |
| 2722 | #define ELF_MACHINE_CODE EM_PARISC |
| 2723 | /* This is not strictly correct. The maximum page size for PA2.0 is |
| 2724 | 64M. But everything still uses 4k. */ |
| 2725 | #define ELF_MAXPAGESIZE 0x1000 |
| 2726 | #define bfd_elf64_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup |
| 2727 | #define bfd_elf64_bfd_is_local_label_name elf_hppa_is_local_label_name |
| 2728 | #define elf_info_to_howto elf_hppa_info_to_howto |
| 2729 | #define elf_info_to_howto_rel elf_hppa_info_to_howto_rel |
| 2730 | |
| 2731 | #define elf_backend_section_from_shdr elf64_hppa_section_from_shdr |
| 2732 | #define elf_backend_object_p elf64_hppa_object_p |
| 2733 | #define elf_backend_final_write_processing \ |
| 2734 | elf_hppa_final_write_processing |
| 2735 | #define elf_backend_fake_sections elf_hppa_fake_sections |
| 2736 | #define elf_backend_add_symbol_hook elf_hppa_add_symbol_hook |
| 2737 | |
| 2738 | #define elf_backend_relocate_section elf_hppa_relocate_section |
| 2739 | |
| 2740 | #define bfd_elf64_bfd_final_link elf_hppa_final_link |
| 2741 | |
| 2742 | #define elf_backend_create_dynamic_sections \ |
| 2743 | elf64_hppa_create_dynamic_sections |
| 2744 | #define elf_backend_post_process_headers elf64_hppa_post_process_headers |
| 2745 | |
| 2746 | #define elf_backend_adjust_dynamic_symbol \ |
| 2747 | elf64_hppa_adjust_dynamic_symbol |
| 2748 | |
| 2749 | #define elf_backend_size_dynamic_sections \ |
| 2750 | elf64_hppa_size_dynamic_sections |
| 2751 | |
| 2752 | #define elf_backend_finish_dynamic_symbol \ |
| 2753 | elf64_hppa_finish_dynamic_symbol |
| 2754 | #define elf_backend_finish_dynamic_sections \ |
| 2755 | elf64_hppa_finish_dynamic_sections |
| 2756 | |
| 2757 | /* Stuff for the BFD linker: */ |
| 2758 | #define bfd_elf64_bfd_link_hash_table_create \ |
| 2759 | elf64_hppa_hash_table_create |
| 2760 | |
| 2761 | #define elf_backend_check_relocs \ |
| 2762 | elf64_hppa_check_relocs |
| 2763 | |
| 2764 | #define elf_backend_size_info \ |
| 2765 | hppa64_elf_size_info |
| 2766 | |
| 2767 | #define elf_backend_additional_program_headers \ |
| 2768 | elf64_hppa_additional_program_headers |
| 2769 | |
| 2770 | #define elf_backend_modify_segment_map \ |
| 2771 | elf64_hppa_modify_segment_map |
| 2772 | |
| 2773 | #define elf_backend_link_output_symbol_hook \ |
| 2774 | elf64_hppa_link_output_symbol_hook |
| 2775 | |
| 2776 | #define elf_backend_want_got_plt 0 |
| 2777 | #define elf_backend_plt_readonly 0 |
| 2778 | #define elf_backend_want_plt_sym 0 |
| 2779 | #define elf_backend_got_header_size 0 |
| 2780 | #define elf_backend_plt_header_size 0 |
| 2781 | #define elf_backend_type_change_ok true |
| 2782 | #define elf_backend_get_symbol_type elf64_hppa_elf_get_symbol_type |
| 2783 | |
| 2784 | #include "elf64-target.h" |
| 2785 | |
| 2786 | #undef TARGET_BIG_SYM |
| 2787 | #define TARGET_BIG_SYM bfd_elf64_hppa_linux_vec |
| 2788 | #undef TARGET_BIG_NAME |
| 2789 | #define TARGET_BIG_NAME "elf64-hppa-linux" |
| 2790 | |
| 2791 | #define INCLUDED_TARGET_FILE 1 |
| 2792 | #include "elf64-target.h" |