| 1 | /* BFD back-end for HP PA-RISC ELF files. |
| 2 | Copyright (C) 1990-2018 Free Software Foundation, Inc. |
| 3 | |
| 4 | Original code by |
| 5 | Center for Software Science |
| 6 | Department of Computer Science |
| 7 | University of Utah |
| 8 | Largely rewritten by Alan Modra <alan@linuxcare.com.au> |
| 9 | Naming cleanup by Carlos O'Donell <carlos@systemhalted.org> |
| 10 | TLS support written by Randolph Chung <tausq@debian.org> |
| 11 | |
| 12 | This file is part of BFD, the Binary File Descriptor library. |
| 13 | |
| 14 | This program is free software; you can redistribute it and/or modify |
| 15 | it under the terms of the GNU General Public License as published by |
| 16 | the Free Software Foundation; either version 3 of the License, or |
| 17 | (at your option) any later version. |
| 18 | |
| 19 | This program is distributed in the hope that it will be useful, |
| 20 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | GNU General Public License for more details. |
| 23 | |
| 24 | You should have received a copy of the GNU General Public License |
| 25 | along with this program; if not, write to the Free Software |
| 26 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 27 | MA 02110-1301, USA. */ |
| 28 | |
| 29 | #include "sysdep.h" |
| 30 | #include "bfd.h" |
| 31 | #include "libbfd.h" |
| 32 | #include "elf-bfd.h" |
| 33 | #include "elf/hppa.h" |
| 34 | #include "libhppa.h" |
| 35 | #include "elf32-hppa.h" |
| 36 | #define ARCH_SIZE 32 |
| 37 | #include "elf32-hppa.h" |
| 38 | #include "elf-hppa.h" |
| 39 | |
| 40 | /* In order to gain some understanding of code in this file without |
| 41 | knowing all the intricate details of the linker, note the |
| 42 | following: |
| 43 | |
| 44 | Functions named elf32_hppa_* are called by external routines, other |
| 45 | functions are only called locally. elf32_hppa_* functions appear |
| 46 | in this file more or less in the order in which they are called |
| 47 | from external routines. eg. elf32_hppa_check_relocs is called |
| 48 | early in the link process, elf32_hppa_finish_dynamic_sections is |
| 49 | one of the last functions. */ |
| 50 | |
| 51 | /* We use two hash tables to hold information for linking PA ELF objects. |
| 52 | |
| 53 | The first is the elf32_hppa_link_hash_table which is derived |
| 54 | from the standard ELF linker hash table. We use this as a place to |
| 55 | attach other hash tables and static information. |
| 56 | |
| 57 | The second is the stub hash table which is derived from the |
| 58 | base BFD hash table. The stub hash table holds the information |
| 59 | necessary to build the linker stubs during a link. |
| 60 | |
| 61 | There are a number of different stubs generated by the linker. |
| 62 | |
| 63 | Long branch stub: |
| 64 | : ldil LR'X,%r1 |
| 65 | : be,n RR'X(%sr4,%r1) |
| 66 | |
| 67 | PIC long branch stub: |
| 68 | : b,l .+8,%r1 |
| 69 | : addil LR'X - ($PIC_pcrel$0 - 4),%r1 |
| 70 | : be,n RR'X - ($PIC_pcrel$0 - 8)(%sr4,%r1) |
| 71 | |
| 72 | Import stub to call shared library routine from normal object file |
| 73 | (single sub-space version) |
| 74 | : addil LR'lt_ptr+ltoff,%dp ; get procedure entry point |
| 75 | : ldw RR'lt_ptr+ltoff(%r1),%r21 |
| 76 | : bv %r0(%r21) |
| 77 | : ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value. |
| 78 | |
| 79 | Import stub to call shared library routine from shared library |
| 80 | (single sub-space version) |
| 81 | : addil LR'ltoff,%r19 ; get procedure entry point |
| 82 | : ldw RR'ltoff(%r1),%r21 |
| 83 | : bv %r0(%r21) |
| 84 | : ldw RR'ltoff+4(%r1),%r19 ; get new dlt value. |
| 85 | |
| 86 | Import stub to call shared library routine from normal object file |
| 87 | (multiple sub-space support) |
| 88 | : addil LR'lt_ptr+ltoff,%dp ; get procedure entry point |
| 89 | : ldw RR'lt_ptr+ltoff(%r1),%r21 |
| 90 | : ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value. |
| 91 | : ldsid (%r21),%r1 |
| 92 | : mtsp %r1,%sr0 |
| 93 | : be 0(%sr0,%r21) ; branch to target |
| 94 | : stw %rp,-24(%sp) ; save rp |
| 95 | |
| 96 | Import stub to call shared library routine from shared library |
| 97 | (multiple sub-space support) |
| 98 | : addil LR'ltoff,%r19 ; get procedure entry point |
| 99 | : ldw RR'ltoff(%r1),%r21 |
| 100 | : ldw RR'ltoff+4(%r1),%r19 ; get new dlt value. |
| 101 | : ldsid (%r21),%r1 |
| 102 | : mtsp %r1,%sr0 |
| 103 | : be 0(%sr0,%r21) ; branch to target |
| 104 | : stw %rp,-24(%sp) ; save rp |
| 105 | |
| 106 | Export stub to return from shared lib routine (multiple sub-space support) |
| 107 | One of these is created for each exported procedure in a shared |
| 108 | library (and stored in the shared lib). Shared lib routines are |
| 109 | called via the first instruction in the export stub so that we can |
| 110 | do an inter-space return. Not required for single sub-space. |
| 111 | : bl,n X,%rp ; trap the return |
| 112 | : nop |
| 113 | : ldw -24(%sp),%rp ; restore the original rp |
| 114 | : ldsid (%rp),%r1 |
| 115 | : mtsp %r1,%sr0 |
| 116 | : be,n 0(%sr0,%rp) ; inter-space return. */ |
| 117 | |
| 118 | |
| 119 | /* Variable names follow a coding style. |
| 120 | Please follow this (Apps Hungarian) style: |
| 121 | |
| 122 | Structure/Variable Prefix |
| 123 | elf_link_hash_table "etab" |
| 124 | elf_link_hash_entry "eh" |
| 125 | |
| 126 | elf32_hppa_link_hash_table "htab" |
| 127 | elf32_hppa_link_hash_entry "hh" |
| 128 | |
| 129 | bfd_hash_table "btab" |
| 130 | bfd_hash_entry "bh" |
| 131 | |
| 132 | bfd_hash_table containing stubs "bstab" |
| 133 | elf32_hppa_stub_hash_entry "hsh" |
| 134 | |
| 135 | Always remember to use GNU Coding Style. */ |
| 136 | |
| 137 | #define PLT_ENTRY_SIZE 8 |
| 138 | #define GOT_ENTRY_SIZE 4 |
| 139 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" |
| 140 | |
| 141 | static const bfd_byte plt_stub[] = |
| 142 | { |
| 143 | 0x0e, 0x80, 0x10, 0x96, /* 1: ldw 0(%r20),%r22 */ |
| 144 | 0xea, 0xc0, 0xc0, 0x00, /* bv %r0(%r22) */ |
| 145 | 0x0e, 0x88, 0x10, 0x95, /* ldw 4(%r20),%r21 */ |
| 146 | #define PLT_STUB_ENTRY (3*4) |
| 147 | 0xea, 0x9f, 0x1f, 0xdd, /* b,l 1b,%r20 */ |
| 148 | 0xd6, 0x80, 0x1c, 0x1e, /* depi 0,31,2,%r20 */ |
| 149 | 0x00, 0xc0, 0xff, 0xee, /* 9: .word fixup_func */ |
| 150 | 0xde, 0xad, 0xbe, 0xef /* .word fixup_ltp */ |
| 151 | }; |
| 152 | |
| 153 | /* Section name for stubs is the associated section name plus this |
| 154 | string. */ |
| 155 | #define STUB_SUFFIX ".stub" |
| 156 | |
| 157 | /* We don't need to copy certain PC- or GP-relative dynamic relocs |
| 158 | into a shared object's dynamic section. All the relocs of the |
| 159 | limited class we are interested in, are absolute. */ |
| 160 | #ifndef RELATIVE_DYNRELOCS |
| 161 | #define RELATIVE_DYNRELOCS 0 |
| 162 | #define IS_ABSOLUTE_RELOC(r_type) 1 |
| 163 | #define pc_dynrelocs(hh) 0 |
| 164 | #endif |
| 165 | |
| 166 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
| 167 | copying dynamic variables from a shared lib into an app's dynbss |
| 168 | section, and instead use a dynamic relocation to point into the |
| 169 | shared lib. */ |
| 170 | #define ELIMINATE_COPY_RELOCS 1 |
| 171 | |
| 172 | enum elf32_hppa_stub_type |
| 173 | { |
| 174 | hppa_stub_long_branch, |
| 175 | hppa_stub_long_branch_shared, |
| 176 | hppa_stub_import, |
| 177 | hppa_stub_import_shared, |
| 178 | hppa_stub_export, |
| 179 | hppa_stub_none |
| 180 | }; |
| 181 | |
| 182 | struct elf32_hppa_stub_hash_entry |
| 183 | { |
| 184 | /* Base hash table entry structure. */ |
| 185 | struct bfd_hash_entry bh_root; |
| 186 | |
| 187 | /* The stub section. */ |
| 188 | asection *stub_sec; |
| 189 | |
| 190 | /* Offset within stub_sec of the beginning of this stub. */ |
| 191 | bfd_vma stub_offset; |
| 192 | |
| 193 | /* Given the symbol's value and its section we can determine its final |
| 194 | value when building the stubs (so the stub knows where to jump. */ |
| 195 | bfd_vma target_value; |
| 196 | asection *target_section; |
| 197 | |
| 198 | enum elf32_hppa_stub_type stub_type; |
| 199 | |
| 200 | /* The symbol table entry, if any, that this was derived from. */ |
| 201 | struct elf32_hppa_link_hash_entry *hh; |
| 202 | |
| 203 | /* Where this stub is being called from, or, in the case of combined |
| 204 | stub sections, the first input section in the group. */ |
| 205 | asection *id_sec; |
| 206 | }; |
| 207 | |
| 208 | enum _tls_type |
| 209 | { |
| 210 | GOT_UNKNOWN = 0, |
| 211 | GOT_NORMAL = 1, |
| 212 | GOT_TLS_GD = 2, |
| 213 | GOT_TLS_LDM = 4, |
| 214 | GOT_TLS_IE = 8 |
| 215 | }; |
| 216 | |
| 217 | struct elf32_hppa_link_hash_entry |
| 218 | { |
| 219 | struct elf_link_hash_entry eh; |
| 220 | |
| 221 | /* A pointer to the most recently used stub hash entry against this |
| 222 | symbol. */ |
| 223 | struct elf32_hppa_stub_hash_entry *hsh_cache; |
| 224 | |
| 225 | /* Used to count relocations for delayed sizing of relocation |
| 226 | sections. */ |
| 227 | struct elf_dyn_relocs *dyn_relocs; |
| 228 | |
| 229 | ENUM_BITFIELD (_tls_type) tls_type : 8; |
| 230 | |
| 231 | /* Set if this symbol is used by a plabel reloc. */ |
| 232 | unsigned int plabel:1; |
| 233 | }; |
| 234 | |
| 235 | struct elf32_hppa_link_hash_table |
| 236 | { |
| 237 | /* The main hash table. */ |
| 238 | struct elf_link_hash_table etab; |
| 239 | |
| 240 | /* The stub hash table. */ |
| 241 | struct bfd_hash_table bstab; |
| 242 | |
| 243 | /* Linker stub bfd. */ |
| 244 | bfd *stub_bfd; |
| 245 | |
| 246 | /* Linker call-backs. */ |
| 247 | asection * (*add_stub_section) (const char *, asection *); |
| 248 | void (*layout_sections_again) (void); |
| 249 | |
| 250 | /* Array to keep track of which stub sections have been created, and |
| 251 | information on stub grouping. */ |
| 252 | struct map_stub |
| 253 | { |
| 254 | /* This is the section to which stubs in the group will be |
| 255 | attached. */ |
| 256 | asection *link_sec; |
| 257 | /* The stub section. */ |
| 258 | asection *stub_sec; |
| 259 | } *stub_group; |
| 260 | |
| 261 | /* Assorted information used by elf32_hppa_size_stubs. */ |
| 262 | unsigned int bfd_count; |
| 263 | unsigned int top_index; |
| 264 | asection **input_list; |
| 265 | Elf_Internal_Sym **all_local_syms; |
| 266 | |
| 267 | /* Used during a final link to store the base of the text and data |
| 268 | segments so that we can perform SEGREL relocations. */ |
| 269 | bfd_vma text_segment_base; |
| 270 | bfd_vma data_segment_base; |
| 271 | |
| 272 | /* Whether we support multiple sub-spaces for shared libs. */ |
| 273 | unsigned int multi_subspace:1; |
| 274 | |
| 275 | /* Flags set when various size branches are detected. Used to |
| 276 | select suitable defaults for the stub group size. */ |
| 277 | unsigned int has_12bit_branch:1; |
| 278 | unsigned int has_17bit_branch:1; |
| 279 | unsigned int has_22bit_branch:1; |
| 280 | |
| 281 | /* Set if we need a .plt stub to support lazy dynamic linking. */ |
| 282 | unsigned int need_plt_stub:1; |
| 283 | |
| 284 | /* Small local sym cache. */ |
| 285 | struct sym_cache sym_cache; |
| 286 | |
| 287 | /* Data for LDM relocations. */ |
| 288 | union |
| 289 | { |
| 290 | bfd_signed_vma refcount; |
| 291 | bfd_vma offset; |
| 292 | } tls_ldm_got; |
| 293 | }; |
| 294 | |
| 295 | /* Various hash macros and functions. */ |
| 296 | #define hppa_link_hash_table(p) \ |
| 297 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
| 298 | == HPPA32_ELF_DATA ? ((struct elf32_hppa_link_hash_table *) ((p)->hash)) : NULL) |
| 299 | |
| 300 | #define hppa_elf_hash_entry(ent) \ |
| 301 | ((struct elf32_hppa_link_hash_entry *)(ent)) |
| 302 | |
| 303 | #define hppa_stub_hash_entry(ent) \ |
| 304 | ((struct elf32_hppa_stub_hash_entry *)(ent)) |
| 305 | |
| 306 | #define hppa_stub_hash_lookup(table, string, create, copy) \ |
| 307 | ((struct elf32_hppa_stub_hash_entry *) \ |
| 308 | bfd_hash_lookup ((table), (string), (create), (copy))) |
| 309 | |
| 310 | #define hppa_elf_local_got_tls_type(abfd) \ |
| 311 | ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info * 2))) |
| 312 | |
| 313 | #define hh_name(hh) \ |
| 314 | (hh ? hh->eh.root.root.string : "<undef>") |
| 315 | |
| 316 | #define eh_name(eh) \ |
| 317 | (eh ? eh->root.root.string : "<undef>") |
| 318 | |
| 319 | /* Assorted hash table functions. */ |
| 320 | |
| 321 | /* Initialize an entry in the stub hash table. */ |
| 322 | |
| 323 | static struct bfd_hash_entry * |
| 324 | stub_hash_newfunc (struct bfd_hash_entry *entry, |
| 325 | struct bfd_hash_table *table, |
| 326 | const char *string) |
| 327 | { |
| 328 | /* Allocate the structure if it has not already been allocated by a |
| 329 | subclass. */ |
| 330 | if (entry == NULL) |
| 331 | { |
| 332 | entry = bfd_hash_allocate (table, |
| 333 | sizeof (struct elf32_hppa_stub_hash_entry)); |
| 334 | if (entry == NULL) |
| 335 | return entry; |
| 336 | } |
| 337 | |
| 338 | /* Call the allocation method of the superclass. */ |
| 339 | entry = bfd_hash_newfunc (entry, table, string); |
| 340 | if (entry != NULL) |
| 341 | { |
| 342 | struct elf32_hppa_stub_hash_entry *hsh; |
| 343 | |
| 344 | /* Initialize the local fields. */ |
| 345 | hsh = hppa_stub_hash_entry (entry); |
| 346 | hsh->stub_sec = NULL; |
| 347 | hsh->stub_offset = 0; |
| 348 | hsh->target_value = 0; |
| 349 | hsh->target_section = NULL; |
| 350 | hsh->stub_type = hppa_stub_long_branch; |
| 351 | hsh->hh = NULL; |
| 352 | hsh->id_sec = NULL; |
| 353 | } |
| 354 | |
| 355 | return entry; |
| 356 | } |
| 357 | |
| 358 | /* Initialize an entry in the link hash table. */ |
| 359 | |
| 360 | static struct bfd_hash_entry * |
| 361 | hppa_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 362 | struct bfd_hash_table *table, |
| 363 | const char *string) |
| 364 | { |
| 365 | /* Allocate the structure if it has not already been allocated by a |
| 366 | subclass. */ |
| 367 | if (entry == NULL) |
| 368 | { |
| 369 | entry = bfd_hash_allocate (table, |
| 370 | sizeof (struct elf32_hppa_link_hash_entry)); |
| 371 | if (entry == NULL) |
| 372 | return entry; |
| 373 | } |
| 374 | |
| 375 | /* Call the allocation method of the superclass. */ |
| 376 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| 377 | if (entry != NULL) |
| 378 | { |
| 379 | struct elf32_hppa_link_hash_entry *hh; |
| 380 | |
| 381 | /* Initialize the local fields. */ |
| 382 | hh = hppa_elf_hash_entry (entry); |
| 383 | hh->hsh_cache = NULL; |
| 384 | hh->dyn_relocs = NULL; |
| 385 | hh->plabel = 0; |
| 386 | hh->tls_type = GOT_UNKNOWN; |
| 387 | } |
| 388 | |
| 389 | return entry; |
| 390 | } |
| 391 | |
| 392 | /* Free the derived linker hash table. */ |
| 393 | |
| 394 | static void |
| 395 | elf32_hppa_link_hash_table_free (bfd *obfd) |
| 396 | { |
| 397 | struct elf32_hppa_link_hash_table *htab |
| 398 | = (struct elf32_hppa_link_hash_table *) obfd->link.hash; |
| 399 | |
| 400 | bfd_hash_table_free (&htab->bstab); |
| 401 | _bfd_elf_link_hash_table_free (obfd); |
| 402 | } |
| 403 | |
| 404 | /* Create the derived linker hash table. The PA ELF port uses the derived |
| 405 | hash table to keep information specific to the PA ELF linker (without |
| 406 | using static variables). */ |
| 407 | |
| 408 | static struct bfd_link_hash_table * |
| 409 | elf32_hppa_link_hash_table_create (bfd *abfd) |
| 410 | { |
| 411 | struct elf32_hppa_link_hash_table *htab; |
| 412 | bfd_size_type amt = sizeof (*htab); |
| 413 | |
| 414 | htab = bfd_zmalloc (amt); |
| 415 | if (htab == NULL) |
| 416 | return NULL; |
| 417 | |
| 418 | if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd, hppa_link_hash_newfunc, |
| 419 | sizeof (struct elf32_hppa_link_hash_entry), |
| 420 | HPPA32_ELF_DATA)) |
| 421 | { |
| 422 | free (htab); |
| 423 | return NULL; |
| 424 | } |
| 425 | |
| 426 | /* Init the stub hash table too. */ |
| 427 | if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc, |
| 428 | sizeof (struct elf32_hppa_stub_hash_entry))) |
| 429 | { |
| 430 | _bfd_elf_link_hash_table_free (abfd); |
| 431 | return NULL; |
| 432 | } |
| 433 | htab->etab.root.hash_table_free = elf32_hppa_link_hash_table_free; |
| 434 | |
| 435 | htab->text_segment_base = (bfd_vma) -1; |
| 436 | htab->data_segment_base = (bfd_vma) -1; |
| 437 | return &htab->etab.root; |
| 438 | } |
| 439 | |
| 440 | /* Initialize the linker stubs BFD so that we can use it for linker |
| 441 | created dynamic sections. */ |
| 442 | |
| 443 | void |
| 444 | elf32_hppa_init_stub_bfd (bfd *abfd, struct bfd_link_info *info) |
| 445 | { |
| 446 | struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info); |
| 447 | |
| 448 | elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS32; |
| 449 | htab->etab.dynobj = abfd; |
| 450 | } |
| 451 | |
| 452 | /* Build a name for an entry in the stub hash table. */ |
| 453 | |
| 454 | static char * |
| 455 | hppa_stub_name (const asection *input_section, |
| 456 | const asection *sym_sec, |
| 457 | const struct elf32_hppa_link_hash_entry *hh, |
| 458 | const Elf_Internal_Rela *rela) |
| 459 | { |
| 460 | char *stub_name; |
| 461 | bfd_size_type len; |
| 462 | |
| 463 | if (hh) |
| 464 | { |
| 465 | len = 8 + 1 + strlen (hh_name (hh)) + 1 + 8 + 1; |
| 466 | stub_name = bfd_malloc (len); |
| 467 | if (stub_name != NULL) |
| 468 | sprintf (stub_name, "%08x_%s+%x", |
| 469 | input_section->id & 0xffffffff, |
| 470 | hh_name (hh), |
| 471 | (int) rela->r_addend & 0xffffffff); |
| 472 | } |
| 473 | else |
| 474 | { |
| 475 | len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; |
| 476 | stub_name = bfd_malloc (len); |
| 477 | if (stub_name != NULL) |
| 478 | sprintf (stub_name, "%08x_%x:%x+%x", |
| 479 | input_section->id & 0xffffffff, |
| 480 | sym_sec->id & 0xffffffff, |
| 481 | (int) ELF32_R_SYM (rela->r_info) & 0xffffffff, |
| 482 | (int) rela->r_addend & 0xffffffff); |
| 483 | } |
| 484 | return stub_name; |
| 485 | } |
| 486 | |
| 487 | /* Look up an entry in the stub hash. Stub entries are cached because |
| 488 | creating the stub name takes a bit of time. */ |
| 489 | |
| 490 | static struct elf32_hppa_stub_hash_entry * |
| 491 | hppa_get_stub_entry (const asection *input_section, |
| 492 | const asection *sym_sec, |
| 493 | struct elf32_hppa_link_hash_entry *hh, |
| 494 | const Elf_Internal_Rela *rela, |
| 495 | struct elf32_hppa_link_hash_table *htab) |
| 496 | { |
| 497 | struct elf32_hppa_stub_hash_entry *hsh_entry; |
| 498 | const asection *id_sec; |
| 499 | |
| 500 | /* If this input section is part of a group of sections sharing one |
| 501 | stub section, then use the id of the first section in the group. |
| 502 | Stub names need to include a section id, as there may well be |
| 503 | more than one stub used to reach say, printf, and we need to |
| 504 | distinguish between them. */ |
| 505 | id_sec = htab->stub_group[input_section->id].link_sec; |
| 506 | if (id_sec == NULL) |
| 507 | return NULL; |
| 508 | |
| 509 | if (hh != NULL && hh->hsh_cache != NULL |
| 510 | && hh->hsh_cache->hh == hh |
| 511 | && hh->hsh_cache->id_sec == id_sec) |
| 512 | { |
| 513 | hsh_entry = hh->hsh_cache; |
| 514 | } |
| 515 | else |
| 516 | { |
| 517 | char *stub_name; |
| 518 | |
| 519 | stub_name = hppa_stub_name (id_sec, sym_sec, hh, rela); |
| 520 | if (stub_name == NULL) |
| 521 | return NULL; |
| 522 | |
| 523 | hsh_entry = hppa_stub_hash_lookup (&htab->bstab, |
| 524 | stub_name, FALSE, FALSE); |
| 525 | if (hh != NULL) |
| 526 | hh->hsh_cache = hsh_entry; |
| 527 | |
| 528 | free (stub_name); |
| 529 | } |
| 530 | |
| 531 | return hsh_entry; |
| 532 | } |
| 533 | |
| 534 | /* Add a new stub entry to the stub hash. Not all fields of the new |
| 535 | stub entry are initialised. */ |
| 536 | |
| 537 | static struct elf32_hppa_stub_hash_entry * |
| 538 | hppa_add_stub (const char *stub_name, |
| 539 | asection *section, |
| 540 | struct elf32_hppa_link_hash_table *htab) |
| 541 | { |
| 542 | asection *link_sec; |
| 543 | asection *stub_sec; |
| 544 | struct elf32_hppa_stub_hash_entry *hsh; |
| 545 | |
| 546 | link_sec = htab->stub_group[section->id].link_sec; |
| 547 | stub_sec = htab->stub_group[section->id].stub_sec; |
| 548 | if (stub_sec == NULL) |
| 549 | { |
| 550 | stub_sec = htab->stub_group[link_sec->id].stub_sec; |
| 551 | if (stub_sec == NULL) |
| 552 | { |
| 553 | size_t namelen; |
| 554 | bfd_size_type len; |
| 555 | char *s_name; |
| 556 | |
| 557 | namelen = strlen (link_sec->name); |
| 558 | len = namelen + sizeof (STUB_SUFFIX); |
| 559 | s_name = bfd_alloc (htab->stub_bfd, len); |
| 560 | if (s_name == NULL) |
| 561 | return NULL; |
| 562 | |
| 563 | memcpy (s_name, link_sec->name, namelen); |
| 564 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); |
| 565 | stub_sec = (*htab->add_stub_section) (s_name, link_sec); |
| 566 | if (stub_sec == NULL) |
| 567 | return NULL; |
| 568 | htab->stub_group[link_sec->id].stub_sec = stub_sec; |
| 569 | } |
| 570 | htab->stub_group[section->id].stub_sec = stub_sec; |
| 571 | } |
| 572 | |
| 573 | /* Enter this entry into the linker stub hash table. */ |
| 574 | hsh = hppa_stub_hash_lookup (&htab->bstab, stub_name, |
| 575 | TRUE, FALSE); |
| 576 | if (hsh == NULL) |
| 577 | { |
| 578 | /* xgettext:c-format */ |
| 579 | _bfd_error_handler (_("%pB: cannot create stub entry %s"), |
| 580 | section->owner, stub_name); |
| 581 | return NULL; |
| 582 | } |
| 583 | |
| 584 | hsh->stub_sec = stub_sec; |
| 585 | hsh->stub_offset = 0; |
| 586 | hsh->id_sec = link_sec; |
| 587 | return hsh; |
| 588 | } |
| 589 | |
| 590 | /* Determine the type of stub needed, if any, for a call. */ |
| 591 | |
| 592 | static enum elf32_hppa_stub_type |
| 593 | hppa_type_of_stub (asection *input_sec, |
| 594 | const Elf_Internal_Rela *rela, |
| 595 | struct elf32_hppa_link_hash_entry *hh, |
| 596 | bfd_vma destination, |
| 597 | struct bfd_link_info *info) |
| 598 | { |
| 599 | bfd_vma location; |
| 600 | bfd_vma branch_offset; |
| 601 | bfd_vma max_branch_offset; |
| 602 | unsigned int r_type; |
| 603 | |
| 604 | if (hh != NULL |
| 605 | && hh->eh.plt.offset != (bfd_vma) -1 |
| 606 | && hh->eh.dynindx != -1 |
| 607 | && !hh->plabel |
| 608 | && (bfd_link_pic (info) |
| 609 | || !hh->eh.def_regular |
| 610 | || hh->eh.root.type == bfd_link_hash_defweak)) |
| 611 | { |
| 612 | /* We need an import stub. Decide between hppa_stub_import |
| 613 | and hppa_stub_import_shared later. */ |
| 614 | return hppa_stub_import; |
| 615 | } |
| 616 | |
| 617 | if (destination == (bfd_vma) -1) |
| 618 | return hppa_stub_none; |
| 619 | |
| 620 | /* Determine where the call point is. */ |
| 621 | location = (input_sec->output_offset |
| 622 | + input_sec->output_section->vma |
| 623 | + rela->r_offset); |
| 624 | |
| 625 | branch_offset = destination - location - 8; |
| 626 | r_type = ELF32_R_TYPE (rela->r_info); |
| 627 | |
| 628 | /* Determine if a long branch stub is needed. parisc branch offsets |
| 629 | are relative to the second instruction past the branch, ie. +8 |
| 630 | bytes on from the branch instruction location. The offset is |
| 631 | signed and counts in units of 4 bytes. */ |
| 632 | if (r_type == (unsigned int) R_PARISC_PCREL17F) |
| 633 | max_branch_offset = (1 << (17 - 1)) << 2; |
| 634 | |
| 635 | else if (r_type == (unsigned int) R_PARISC_PCREL12F) |
| 636 | max_branch_offset = (1 << (12 - 1)) << 2; |
| 637 | |
| 638 | else /* R_PARISC_PCREL22F. */ |
| 639 | max_branch_offset = (1 << (22 - 1)) << 2; |
| 640 | |
| 641 | if (branch_offset + max_branch_offset >= 2*max_branch_offset) |
| 642 | return hppa_stub_long_branch; |
| 643 | |
| 644 | return hppa_stub_none; |
| 645 | } |
| 646 | |
| 647 | /* Build one linker stub as defined by the stub hash table entry GEN_ENTRY. |
| 648 | IN_ARG contains the link info pointer. */ |
| 649 | |
| 650 | #define LDIL_R1 0x20200000 /* ldil LR'XXX,%r1 */ |
| 651 | #define BE_SR4_R1 0xe0202002 /* be,n RR'XXX(%sr4,%r1) */ |
| 652 | |
| 653 | #define BL_R1 0xe8200000 /* b,l .+8,%r1 */ |
| 654 | #define ADDIL_R1 0x28200000 /* addil LR'XXX,%r1,%r1 */ |
| 655 | #define DEPI_R1 0xd4201c1e /* depi 0,31,2,%r1 */ |
| 656 | |
| 657 | #define ADDIL_DP 0x2b600000 /* addil LR'XXX,%dp,%r1 */ |
| 658 | #define LDW_R1_R21 0x48350000 /* ldw RR'XXX(%sr0,%r1),%r21 */ |
| 659 | #define BV_R0_R21 0xeaa0c000 /* bv %r0(%r21) */ |
| 660 | #define LDW_R1_R19 0x48330000 /* ldw RR'XXX(%sr0,%r1),%r19 */ |
| 661 | |
| 662 | #define ADDIL_R19 0x2a600000 /* addil LR'XXX,%r19,%r1 */ |
| 663 | #define LDW_R1_DP 0x483b0000 /* ldw RR'XXX(%sr0,%r1),%dp */ |
| 664 | |
| 665 | #define LDSID_R21_R1 0x02a010a1 /* ldsid (%sr0,%r21),%r1 */ |
| 666 | #define MTSP_R1 0x00011820 /* mtsp %r1,%sr0 */ |
| 667 | #define BE_SR0_R21 0xe2a00000 /* be 0(%sr0,%r21) */ |
| 668 | #define STW_RP 0x6bc23fd1 /* stw %rp,-24(%sr0,%sp) */ |
| 669 | |
| 670 | #define BL22_RP 0xe800a002 /* b,l,n XXX,%rp */ |
| 671 | #define BL_RP 0xe8400002 /* b,l,n XXX,%rp */ |
| 672 | #define NOP 0x08000240 /* nop */ |
| 673 | #define LDW_RP 0x4bc23fd1 /* ldw -24(%sr0,%sp),%rp */ |
| 674 | #define LDSID_RP_R1 0x004010a1 /* ldsid (%sr0,%rp),%r1 */ |
| 675 | #define BE_SR0_RP 0xe0400002 /* be,n 0(%sr0,%rp) */ |
| 676 | |
| 677 | #ifndef R19_STUBS |
| 678 | #define R19_STUBS 1 |
| 679 | #endif |
| 680 | |
| 681 | #if R19_STUBS |
| 682 | #define LDW_R1_DLT LDW_R1_R19 |
| 683 | #else |
| 684 | #define LDW_R1_DLT LDW_R1_DP |
| 685 | #endif |
| 686 | |
| 687 | static bfd_boolean |
| 688 | hppa_build_one_stub (struct bfd_hash_entry *bh, void *in_arg) |
| 689 | { |
| 690 | struct elf32_hppa_stub_hash_entry *hsh; |
| 691 | struct bfd_link_info *info; |
| 692 | struct elf32_hppa_link_hash_table *htab; |
| 693 | asection *stub_sec; |
| 694 | bfd *stub_bfd; |
| 695 | bfd_byte *loc; |
| 696 | bfd_vma sym_value; |
| 697 | bfd_vma insn; |
| 698 | bfd_vma off; |
| 699 | int val; |
| 700 | int size; |
| 701 | |
| 702 | /* Massage our args to the form they really have. */ |
| 703 | hsh = hppa_stub_hash_entry (bh); |
| 704 | info = (struct bfd_link_info *)in_arg; |
| 705 | |
| 706 | htab = hppa_link_hash_table (info); |
| 707 | if (htab == NULL) |
| 708 | return FALSE; |
| 709 | |
| 710 | stub_sec = hsh->stub_sec; |
| 711 | |
| 712 | /* Make a note of the offset within the stubs for this entry. */ |
| 713 | hsh->stub_offset = stub_sec->size; |
| 714 | loc = stub_sec->contents + hsh->stub_offset; |
| 715 | |
| 716 | stub_bfd = stub_sec->owner; |
| 717 | |
| 718 | switch (hsh->stub_type) |
| 719 | { |
| 720 | case hppa_stub_long_branch: |
| 721 | /* Create the long branch. A long branch is formed with "ldil" |
| 722 | loading the upper bits of the target address into a register, |
| 723 | then branching with "be" which adds in the lower bits. |
| 724 | The "be" has its delay slot nullified. */ |
| 725 | sym_value = (hsh->target_value |
| 726 | + hsh->target_section->output_offset |
| 727 | + hsh->target_section->output_section->vma); |
| 728 | |
| 729 | val = hppa_field_adjust (sym_value, 0, e_lrsel); |
| 730 | insn = hppa_rebuild_insn ((int) LDIL_R1, val, 21); |
| 731 | bfd_put_32 (stub_bfd, insn, loc); |
| 732 | |
| 733 | val = hppa_field_adjust (sym_value, 0, e_rrsel) >> 2; |
| 734 | insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17); |
| 735 | bfd_put_32 (stub_bfd, insn, loc + 4); |
| 736 | |
| 737 | size = 8; |
| 738 | break; |
| 739 | |
| 740 | case hppa_stub_long_branch_shared: |
| 741 | /* Branches are relative. This is where we are going to. */ |
| 742 | sym_value = (hsh->target_value |
| 743 | + hsh->target_section->output_offset |
| 744 | + hsh->target_section->output_section->vma); |
| 745 | |
| 746 | /* And this is where we are coming from, more or less. */ |
| 747 | sym_value -= (hsh->stub_offset |
| 748 | + stub_sec->output_offset |
| 749 | + stub_sec->output_section->vma); |
| 750 | |
| 751 | bfd_put_32 (stub_bfd, (bfd_vma) BL_R1, loc); |
| 752 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_lrsel); |
| 753 | insn = hppa_rebuild_insn ((int) ADDIL_R1, val, 21); |
| 754 | bfd_put_32 (stub_bfd, insn, loc + 4); |
| 755 | |
| 756 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_rrsel) >> 2; |
| 757 | insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17); |
| 758 | bfd_put_32 (stub_bfd, insn, loc + 8); |
| 759 | size = 12; |
| 760 | break; |
| 761 | |
| 762 | case hppa_stub_import: |
| 763 | case hppa_stub_import_shared: |
| 764 | off = hsh->hh->eh.plt.offset; |
| 765 | if (off >= (bfd_vma) -2) |
| 766 | abort (); |
| 767 | |
| 768 | off &= ~ (bfd_vma) 1; |
| 769 | sym_value = (off |
| 770 | + htab->etab.splt->output_offset |
| 771 | + htab->etab.splt->output_section->vma |
| 772 | - elf_gp (htab->etab.splt->output_section->owner)); |
| 773 | |
| 774 | insn = ADDIL_DP; |
| 775 | #if R19_STUBS |
| 776 | if (hsh->stub_type == hppa_stub_import_shared) |
| 777 | insn = ADDIL_R19; |
| 778 | #endif |
| 779 | val = hppa_field_adjust (sym_value, 0, e_lrsel), |
| 780 | insn = hppa_rebuild_insn ((int) insn, val, 21); |
| 781 | bfd_put_32 (stub_bfd, insn, loc); |
| 782 | |
| 783 | /* It is critical to use lrsel/rrsel here because we are using |
| 784 | two different offsets (+0 and +4) from sym_value. If we use |
| 785 | lsel/rsel then with unfortunate sym_values we will round |
| 786 | sym_value+4 up to the next 2k block leading to a mis-match |
| 787 | between the lsel and rsel value. */ |
| 788 | val = hppa_field_adjust (sym_value, 0, e_rrsel); |
| 789 | insn = hppa_rebuild_insn ((int) LDW_R1_R21, val, 14); |
| 790 | bfd_put_32 (stub_bfd, insn, loc + 4); |
| 791 | |
| 792 | if (htab->multi_subspace) |
| 793 | { |
| 794 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel); |
| 795 | insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14); |
| 796 | bfd_put_32 (stub_bfd, insn, loc + 8); |
| 797 | |
| 798 | bfd_put_32 (stub_bfd, (bfd_vma) LDSID_R21_R1, loc + 12); |
| 799 | bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16); |
| 800 | bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_R21, loc + 20); |
| 801 | bfd_put_32 (stub_bfd, (bfd_vma) STW_RP, loc + 24); |
| 802 | |
| 803 | size = 28; |
| 804 | } |
| 805 | else |
| 806 | { |
| 807 | bfd_put_32 (stub_bfd, (bfd_vma) BV_R0_R21, loc + 8); |
| 808 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel); |
| 809 | insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14); |
| 810 | bfd_put_32 (stub_bfd, insn, loc + 12); |
| 811 | |
| 812 | size = 16; |
| 813 | } |
| 814 | |
| 815 | break; |
| 816 | |
| 817 | case hppa_stub_export: |
| 818 | /* Branches are relative. This is where we are going to. */ |
| 819 | sym_value = (hsh->target_value |
| 820 | + hsh->target_section->output_offset |
| 821 | + hsh->target_section->output_section->vma); |
| 822 | |
| 823 | /* And this is where we are coming from. */ |
| 824 | sym_value -= (hsh->stub_offset |
| 825 | + stub_sec->output_offset |
| 826 | + stub_sec->output_section->vma); |
| 827 | |
| 828 | if (sym_value - 8 + (1 << (17 + 1)) >= (1 << (17 + 2)) |
| 829 | && (!htab->has_22bit_branch |
| 830 | || sym_value - 8 + (1 << (22 + 1)) >= (1 << (22 + 2)))) |
| 831 | { |
| 832 | _bfd_error_handler |
| 833 | /* xgettext:c-format */ |
| 834 | (_("%pB(%pA+%#" PRIx64 "): " |
| 835 | "cannot reach %s, recompile with -ffunction-sections"), |
| 836 | hsh->target_section->owner, |
| 837 | stub_sec, |
| 838 | (uint64_t) hsh->stub_offset, |
| 839 | hsh->bh_root.string); |
| 840 | bfd_set_error (bfd_error_bad_value); |
| 841 | return FALSE; |
| 842 | } |
| 843 | |
| 844 | val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_fsel) >> 2; |
| 845 | if (!htab->has_22bit_branch) |
| 846 | insn = hppa_rebuild_insn ((int) BL_RP, val, 17); |
| 847 | else |
| 848 | insn = hppa_rebuild_insn ((int) BL22_RP, val, 22); |
| 849 | bfd_put_32 (stub_bfd, insn, loc); |
| 850 | |
| 851 | bfd_put_32 (stub_bfd, (bfd_vma) NOP, loc + 4); |
| 852 | bfd_put_32 (stub_bfd, (bfd_vma) LDW_RP, loc + 8); |
| 853 | bfd_put_32 (stub_bfd, (bfd_vma) LDSID_RP_R1, loc + 12); |
| 854 | bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16); |
| 855 | bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_RP, loc + 20); |
| 856 | |
| 857 | /* Point the function symbol at the stub. */ |
| 858 | hsh->hh->eh.root.u.def.section = stub_sec; |
| 859 | hsh->hh->eh.root.u.def.value = stub_sec->size; |
| 860 | |
| 861 | size = 24; |
| 862 | break; |
| 863 | |
| 864 | default: |
| 865 | BFD_FAIL (); |
| 866 | return FALSE; |
| 867 | } |
| 868 | |
| 869 | stub_sec->size += size; |
| 870 | return TRUE; |
| 871 | } |
| 872 | |
| 873 | #undef LDIL_R1 |
| 874 | #undef BE_SR4_R1 |
| 875 | #undef BL_R1 |
| 876 | #undef ADDIL_R1 |
| 877 | #undef DEPI_R1 |
| 878 | #undef LDW_R1_R21 |
| 879 | #undef LDW_R1_DLT |
| 880 | #undef LDW_R1_R19 |
| 881 | #undef ADDIL_R19 |
| 882 | #undef LDW_R1_DP |
| 883 | #undef LDSID_R21_R1 |
| 884 | #undef MTSP_R1 |
| 885 | #undef BE_SR0_R21 |
| 886 | #undef STW_RP |
| 887 | #undef BV_R0_R21 |
| 888 | #undef BL_RP |
| 889 | #undef NOP |
| 890 | #undef LDW_RP |
| 891 | #undef LDSID_RP_R1 |
| 892 | #undef BE_SR0_RP |
| 893 | |
| 894 | /* As above, but don't actually build the stub. Just bump offset so |
| 895 | we know stub section sizes. */ |
| 896 | |
| 897 | static bfd_boolean |
| 898 | hppa_size_one_stub (struct bfd_hash_entry *bh, void *in_arg) |
| 899 | { |
| 900 | struct elf32_hppa_stub_hash_entry *hsh; |
| 901 | struct elf32_hppa_link_hash_table *htab; |
| 902 | int size; |
| 903 | |
| 904 | /* Massage our args to the form they really have. */ |
| 905 | hsh = hppa_stub_hash_entry (bh); |
| 906 | htab = in_arg; |
| 907 | |
| 908 | if (hsh->stub_type == hppa_stub_long_branch) |
| 909 | size = 8; |
| 910 | else if (hsh->stub_type == hppa_stub_long_branch_shared) |
| 911 | size = 12; |
| 912 | else if (hsh->stub_type == hppa_stub_export) |
| 913 | size = 24; |
| 914 | else /* hppa_stub_import or hppa_stub_import_shared. */ |
| 915 | { |
| 916 | if (htab->multi_subspace) |
| 917 | size = 28; |
| 918 | else |
| 919 | size = 16; |
| 920 | } |
| 921 | |
| 922 | hsh->stub_sec->size += size; |
| 923 | return TRUE; |
| 924 | } |
| 925 | |
| 926 | /* Return nonzero if ABFD represents an HPPA ELF32 file. |
| 927 | Additionally we set the default architecture and machine. */ |
| 928 | |
| 929 | static bfd_boolean |
| 930 | elf32_hppa_object_p (bfd *abfd) |
| 931 | { |
| 932 | Elf_Internal_Ehdr * i_ehdrp; |
| 933 | unsigned int flags; |
| 934 | |
| 935 | i_ehdrp = elf_elfheader (abfd); |
| 936 | if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0) |
| 937 | { |
| 938 | /* GCC on hppa-linux produces binaries with OSABI=GNU, |
| 939 | but the kernel produces corefiles with OSABI=SysV. */ |
| 940 | if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_GNU && |
| 941 | i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_NONE) /* aka SYSV */ |
| 942 | return FALSE; |
| 943 | } |
| 944 | else if (strcmp (bfd_get_target (abfd), "elf32-hppa-netbsd") == 0) |
| 945 | { |
| 946 | /* GCC on hppa-netbsd produces binaries with OSABI=NetBSD, |
| 947 | but the kernel produces corefiles with OSABI=SysV. */ |
| 948 | if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_NETBSD && |
| 949 | i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_NONE) /* aka SYSV */ |
| 950 | return FALSE; |
| 951 | } |
| 952 | else |
| 953 | { |
| 954 | if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_HPUX) |
| 955 | return FALSE; |
| 956 | } |
| 957 | |
| 958 | flags = i_ehdrp->e_flags; |
| 959 | switch (flags & (EF_PARISC_ARCH | EF_PARISC_WIDE)) |
| 960 | { |
| 961 | case EFA_PARISC_1_0: |
| 962 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 10); |
| 963 | case EFA_PARISC_1_1: |
| 964 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 11); |
| 965 | case EFA_PARISC_2_0: |
| 966 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 20); |
| 967 | case EFA_PARISC_2_0 | EF_PARISC_WIDE: |
| 968 | return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 25); |
| 969 | } |
| 970 | return TRUE; |
| 971 | } |
| 972 | |
| 973 | /* Create the .plt and .got sections, and set up our hash table |
| 974 | short-cuts to various dynamic sections. */ |
| 975 | |
| 976 | static bfd_boolean |
| 977 | elf32_hppa_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
| 978 | { |
| 979 | struct elf32_hppa_link_hash_table *htab; |
| 980 | struct elf_link_hash_entry *eh; |
| 981 | |
| 982 | /* Don't try to create the .plt and .got twice. */ |
| 983 | htab = hppa_link_hash_table (info); |
| 984 | if (htab == NULL) |
| 985 | return FALSE; |
| 986 | if (htab->etab.splt != NULL) |
| 987 | return TRUE; |
| 988 | |
| 989 | /* Call the generic code to do most of the work. */ |
| 990 | if (! _bfd_elf_create_dynamic_sections (abfd, info)) |
| 991 | return FALSE; |
| 992 | |
| 993 | /* hppa-linux needs _GLOBAL_OFFSET_TABLE_ to be visible from the main |
| 994 | application, because __canonicalize_funcptr_for_compare needs it. */ |
| 995 | eh = elf_hash_table (info)->hgot; |
| 996 | eh->forced_local = 0; |
| 997 | eh->other = STV_DEFAULT; |
| 998 | return bfd_elf_link_record_dynamic_symbol (info, eh); |
| 999 | } |
| 1000 | |
| 1001 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 1002 | |
| 1003 | static void |
| 1004 | elf32_hppa_copy_indirect_symbol (struct bfd_link_info *info, |
| 1005 | struct elf_link_hash_entry *eh_dir, |
| 1006 | struct elf_link_hash_entry *eh_ind) |
| 1007 | { |
| 1008 | struct elf32_hppa_link_hash_entry *hh_dir, *hh_ind; |
| 1009 | |
| 1010 | hh_dir = hppa_elf_hash_entry (eh_dir); |
| 1011 | hh_ind = hppa_elf_hash_entry (eh_ind); |
| 1012 | |
| 1013 | if (hh_ind->dyn_relocs != NULL |
| 1014 | && eh_ind->root.type == bfd_link_hash_indirect) |
| 1015 | { |
| 1016 | if (hh_dir->dyn_relocs != NULL) |
| 1017 | { |
| 1018 | struct elf_dyn_relocs **hdh_pp; |
| 1019 | struct elf_dyn_relocs *hdh_p; |
| 1020 | |
| 1021 | /* Add reloc counts against the indirect sym to the direct sym |
| 1022 | list. Merge any entries against the same section. */ |
| 1023 | for (hdh_pp = &hh_ind->dyn_relocs; (hdh_p = *hdh_pp) != NULL; ) |
| 1024 | { |
| 1025 | struct elf_dyn_relocs *hdh_q; |
| 1026 | |
| 1027 | for (hdh_q = hh_dir->dyn_relocs; |
| 1028 | hdh_q != NULL; |
| 1029 | hdh_q = hdh_q->next) |
| 1030 | if (hdh_q->sec == hdh_p->sec) |
| 1031 | { |
| 1032 | #if RELATIVE_DYNRELOCS |
| 1033 | hdh_q->pc_count += hdh_p->pc_count; |
| 1034 | #endif |
| 1035 | hdh_q->count += hdh_p->count; |
| 1036 | *hdh_pp = hdh_p->next; |
| 1037 | break; |
| 1038 | } |
| 1039 | if (hdh_q == NULL) |
| 1040 | hdh_pp = &hdh_p->next; |
| 1041 | } |
| 1042 | *hdh_pp = hh_dir->dyn_relocs; |
| 1043 | } |
| 1044 | |
| 1045 | hh_dir->dyn_relocs = hh_ind->dyn_relocs; |
| 1046 | hh_ind->dyn_relocs = NULL; |
| 1047 | } |
| 1048 | |
| 1049 | if (eh_ind->root.type == bfd_link_hash_indirect) |
| 1050 | { |
| 1051 | hh_dir->plabel |= hh_ind->plabel; |
| 1052 | hh_dir->tls_type |= hh_ind->tls_type; |
| 1053 | hh_ind->tls_type = GOT_UNKNOWN; |
| 1054 | } |
| 1055 | |
| 1056 | _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind); |
| 1057 | } |
| 1058 | |
| 1059 | static int |
| 1060 | elf32_hppa_optimized_tls_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 1061 | int r_type, int is_local ATTRIBUTE_UNUSED) |
| 1062 | { |
| 1063 | /* For now we don't support linker optimizations. */ |
| 1064 | return r_type; |
| 1065 | } |
| 1066 | |
| 1067 | /* Return a pointer to the local GOT, PLT and TLS reference counts |
| 1068 | for ABFD. Returns NULL if the storage allocation fails. */ |
| 1069 | |
| 1070 | static bfd_signed_vma * |
| 1071 | hppa32_elf_local_refcounts (bfd *abfd) |
| 1072 | { |
| 1073 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1074 | bfd_signed_vma *local_refcounts; |
| 1075 | |
| 1076 | local_refcounts = elf_local_got_refcounts (abfd); |
| 1077 | if (local_refcounts == NULL) |
| 1078 | { |
| 1079 | bfd_size_type size; |
| 1080 | |
| 1081 | /* Allocate space for local GOT and PLT reference |
| 1082 | counts. Done this way to save polluting elf_obj_tdata |
| 1083 | with another target specific pointer. */ |
| 1084 | size = symtab_hdr->sh_info; |
| 1085 | size *= 2 * sizeof (bfd_signed_vma); |
| 1086 | /* Add in space to store the local GOT TLS types. */ |
| 1087 | size += symtab_hdr->sh_info; |
| 1088 | local_refcounts = bfd_zalloc (abfd, size); |
| 1089 | if (local_refcounts == NULL) |
| 1090 | return NULL; |
| 1091 | elf_local_got_refcounts (abfd) = local_refcounts; |
| 1092 | memset (hppa_elf_local_got_tls_type (abfd), GOT_UNKNOWN, |
| 1093 | symtab_hdr->sh_info); |
| 1094 | } |
| 1095 | return local_refcounts; |
| 1096 | } |
| 1097 | |
| 1098 | |
| 1099 | /* Look through the relocs for a section during the first phase, and |
| 1100 | calculate needed space in the global offset table, procedure linkage |
| 1101 | table, and dynamic reloc sections. At this point we haven't |
| 1102 | necessarily read all the input files. */ |
| 1103 | |
| 1104 | static bfd_boolean |
| 1105 | elf32_hppa_check_relocs (bfd *abfd, |
| 1106 | struct bfd_link_info *info, |
| 1107 | asection *sec, |
| 1108 | const Elf_Internal_Rela *relocs) |
| 1109 | { |
| 1110 | Elf_Internal_Shdr *symtab_hdr; |
| 1111 | struct elf_link_hash_entry **eh_syms; |
| 1112 | const Elf_Internal_Rela *rela; |
| 1113 | const Elf_Internal_Rela *rela_end; |
| 1114 | struct elf32_hppa_link_hash_table *htab; |
| 1115 | asection *sreloc; |
| 1116 | |
| 1117 | if (bfd_link_relocatable (info)) |
| 1118 | return TRUE; |
| 1119 | |
| 1120 | htab = hppa_link_hash_table (info); |
| 1121 | if (htab == NULL) |
| 1122 | return FALSE; |
| 1123 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1124 | eh_syms = elf_sym_hashes (abfd); |
| 1125 | sreloc = NULL; |
| 1126 | |
| 1127 | rela_end = relocs + sec->reloc_count; |
| 1128 | for (rela = relocs; rela < rela_end; rela++) |
| 1129 | { |
| 1130 | enum { |
| 1131 | NEED_GOT = 1, |
| 1132 | NEED_PLT = 2, |
| 1133 | NEED_DYNREL = 4, |
| 1134 | PLT_PLABEL = 8 |
| 1135 | }; |
| 1136 | |
| 1137 | unsigned int r_symndx, r_type; |
| 1138 | struct elf32_hppa_link_hash_entry *hh; |
| 1139 | int need_entry = 0; |
| 1140 | |
| 1141 | r_symndx = ELF32_R_SYM (rela->r_info); |
| 1142 | |
| 1143 | if (r_symndx < symtab_hdr->sh_info) |
| 1144 | hh = NULL; |
| 1145 | else |
| 1146 | { |
| 1147 | hh = hppa_elf_hash_entry (eh_syms[r_symndx - symtab_hdr->sh_info]); |
| 1148 | while (hh->eh.root.type == bfd_link_hash_indirect |
| 1149 | || hh->eh.root.type == bfd_link_hash_warning) |
| 1150 | hh = hppa_elf_hash_entry (hh->eh.root.u.i.link); |
| 1151 | } |
| 1152 | |
| 1153 | r_type = ELF32_R_TYPE (rela->r_info); |
| 1154 | r_type = elf32_hppa_optimized_tls_reloc (info, r_type, hh == NULL); |
| 1155 | |
| 1156 | switch (r_type) |
| 1157 | { |
| 1158 | case R_PARISC_DLTIND14F: |
| 1159 | case R_PARISC_DLTIND14R: |
| 1160 | case R_PARISC_DLTIND21L: |
| 1161 | /* This symbol requires a global offset table entry. */ |
| 1162 | need_entry = NEED_GOT; |
| 1163 | break; |
| 1164 | |
| 1165 | case R_PARISC_PLABEL14R: /* "Official" procedure labels. */ |
| 1166 | case R_PARISC_PLABEL21L: |
| 1167 | case R_PARISC_PLABEL32: |
| 1168 | /* If the addend is non-zero, we break badly. */ |
| 1169 | if (rela->r_addend != 0) |
| 1170 | abort (); |
| 1171 | |
| 1172 | /* If we are creating a shared library, then we need to |
| 1173 | create a PLT entry for all PLABELs, because PLABELs with |
| 1174 | local symbols may be passed via a pointer to another |
| 1175 | object. Additionally, output a dynamic relocation |
| 1176 | pointing to the PLT entry. |
| 1177 | |
| 1178 | For executables, the original 32-bit ABI allowed two |
| 1179 | different styles of PLABELs (function pointers): For |
| 1180 | global functions, the PLABEL word points into the .plt |
| 1181 | two bytes past a (function address, gp) pair, and for |
| 1182 | local functions the PLABEL points directly at the |
| 1183 | function. The magic +2 for the first type allows us to |
| 1184 | differentiate between the two. As you can imagine, this |
| 1185 | is a real pain when it comes to generating code to call |
| 1186 | functions indirectly or to compare function pointers. |
| 1187 | We avoid the mess by always pointing a PLABEL into the |
| 1188 | .plt, even for local functions. */ |
| 1189 | need_entry = PLT_PLABEL | NEED_PLT; |
| 1190 | if (bfd_link_pic (info)) |
| 1191 | need_entry |= NEED_DYNREL; |
| 1192 | break; |
| 1193 | |
| 1194 | case R_PARISC_PCREL12F: |
| 1195 | htab->has_12bit_branch = 1; |
| 1196 | goto branch_common; |
| 1197 | |
| 1198 | case R_PARISC_PCREL17C: |
| 1199 | case R_PARISC_PCREL17F: |
| 1200 | htab->has_17bit_branch = 1; |
| 1201 | goto branch_common; |
| 1202 | |
| 1203 | case R_PARISC_PCREL22F: |
| 1204 | htab->has_22bit_branch = 1; |
| 1205 | branch_common: |
| 1206 | /* Function calls might need to go through the .plt, and |
| 1207 | might require long branch stubs. */ |
| 1208 | if (hh == NULL) |
| 1209 | { |
| 1210 | /* We know local syms won't need a .plt entry, and if |
| 1211 | they need a long branch stub we can't guarantee that |
| 1212 | we can reach the stub. So just flag an error later |
| 1213 | if we're doing a shared link and find we need a long |
| 1214 | branch stub. */ |
| 1215 | continue; |
| 1216 | } |
| 1217 | else |
| 1218 | { |
| 1219 | /* Global symbols will need a .plt entry if they remain |
| 1220 | global, and in most cases won't need a long branch |
| 1221 | stub. Unfortunately, we have to cater for the case |
| 1222 | where a symbol is forced local by versioning, or due |
| 1223 | to symbolic linking, and we lose the .plt entry. */ |
| 1224 | need_entry = NEED_PLT; |
| 1225 | if (hh->eh.type == STT_PARISC_MILLI) |
| 1226 | need_entry = 0; |
| 1227 | } |
| 1228 | break; |
| 1229 | |
| 1230 | case R_PARISC_SEGBASE: /* Used to set segment base. */ |
| 1231 | case R_PARISC_SEGREL32: /* Relative reloc, used for unwind. */ |
| 1232 | case R_PARISC_PCREL14F: /* PC relative load/store. */ |
| 1233 | case R_PARISC_PCREL14R: |
| 1234 | case R_PARISC_PCREL17R: /* External branches. */ |
| 1235 | case R_PARISC_PCREL21L: /* As above, and for load/store too. */ |
| 1236 | case R_PARISC_PCREL32: |
| 1237 | /* We don't need to propagate the relocation if linking a |
| 1238 | shared object since these are section relative. */ |
| 1239 | continue; |
| 1240 | |
| 1241 | case R_PARISC_DPREL14F: /* Used for gp rel data load/store. */ |
| 1242 | case R_PARISC_DPREL14R: |
| 1243 | case R_PARISC_DPREL21L: |
| 1244 | if (bfd_link_pic (info)) |
| 1245 | { |
| 1246 | _bfd_error_handler |
| 1247 | /* xgettext:c-format */ |
| 1248 | (_("%pB: relocation %s can not be used when making a shared object; recompile with -fPIC"), |
| 1249 | abfd, |
| 1250 | elf_hppa_howto_table[r_type].name); |
| 1251 | bfd_set_error (bfd_error_bad_value); |
| 1252 | return FALSE; |
| 1253 | } |
| 1254 | /* Fall through. */ |
| 1255 | |
| 1256 | case R_PARISC_DIR17F: /* Used for external branches. */ |
| 1257 | case R_PARISC_DIR17R: |
| 1258 | case R_PARISC_DIR14F: /* Used for load/store from absolute locn. */ |
| 1259 | case R_PARISC_DIR14R: |
| 1260 | case R_PARISC_DIR21L: /* As above, and for ext branches too. */ |
| 1261 | case R_PARISC_DIR32: /* .word relocs. */ |
| 1262 | /* We may want to output a dynamic relocation later. */ |
| 1263 | need_entry = NEED_DYNREL; |
| 1264 | break; |
| 1265 | |
| 1266 | /* This relocation describes the C++ object vtable hierarchy. |
| 1267 | Reconstruct it for later use during GC. */ |
| 1268 | case R_PARISC_GNU_VTINHERIT: |
| 1269 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh, rela->r_offset)) |
| 1270 | return FALSE; |
| 1271 | continue; |
| 1272 | |
| 1273 | /* This relocation describes which C++ vtable entries are actually |
| 1274 | used. Record for later use during GC. */ |
| 1275 | case R_PARISC_GNU_VTENTRY: |
| 1276 | BFD_ASSERT (hh != NULL); |
| 1277 | if (hh != NULL |
| 1278 | && !bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rela->r_addend)) |
| 1279 | return FALSE; |
| 1280 | continue; |
| 1281 | |
| 1282 | case R_PARISC_TLS_GD21L: |
| 1283 | case R_PARISC_TLS_GD14R: |
| 1284 | case R_PARISC_TLS_LDM21L: |
| 1285 | case R_PARISC_TLS_LDM14R: |
| 1286 | need_entry = NEED_GOT; |
| 1287 | break; |
| 1288 | |
| 1289 | case R_PARISC_TLS_IE21L: |
| 1290 | case R_PARISC_TLS_IE14R: |
| 1291 | if (bfd_link_dll (info)) |
| 1292 | info->flags |= DF_STATIC_TLS; |
| 1293 | need_entry = NEED_GOT; |
| 1294 | break; |
| 1295 | |
| 1296 | default: |
| 1297 | continue; |
| 1298 | } |
| 1299 | |
| 1300 | /* Now carry out our orders. */ |
| 1301 | if (need_entry & NEED_GOT) |
| 1302 | { |
| 1303 | int tls_type = GOT_NORMAL; |
| 1304 | |
| 1305 | switch (r_type) |
| 1306 | { |
| 1307 | default: |
| 1308 | break; |
| 1309 | case R_PARISC_TLS_GD21L: |
| 1310 | case R_PARISC_TLS_GD14R: |
| 1311 | tls_type = GOT_TLS_GD; |
| 1312 | break; |
| 1313 | case R_PARISC_TLS_LDM21L: |
| 1314 | case R_PARISC_TLS_LDM14R: |
| 1315 | tls_type = GOT_TLS_LDM; |
| 1316 | break; |
| 1317 | case R_PARISC_TLS_IE21L: |
| 1318 | case R_PARISC_TLS_IE14R: |
| 1319 | tls_type = GOT_TLS_IE; |
| 1320 | break; |
| 1321 | } |
| 1322 | |
| 1323 | /* Allocate space for a GOT entry, as well as a dynamic |
| 1324 | relocation for this entry. */ |
| 1325 | if (htab->etab.sgot == NULL) |
| 1326 | { |
| 1327 | if (!elf32_hppa_create_dynamic_sections (htab->etab.dynobj, info)) |
| 1328 | return FALSE; |
| 1329 | } |
| 1330 | |
| 1331 | if (hh != NULL) |
| 1332 | { |
| 1333 | if (tls_type == GOT_TLS_LDM) |
| 1334 | htab->tls_ldm_got.refcount += 1; |
| 1335 | else |
| 1336 | hh->eh.got.refcount += 1; |
| 1337 | hh->tls_type |= tls_type; |
| 1338 | } |
| 1339 | else |
| 1340 | { |
| 1341 | bfd_signed_vma *local_got_refcounts; |
| 1342 | |
| 1343 | /* This is a global offset table entry for a local symbol. */ |
| 1344 | local_got_refcounts = hppa32_elf_local_refcounts (abfd); |
| 1345 | if (local_got_refcounts == NULL) |
| 1346 | return FALSE; |
| 1347 | if (tls_type == GOT_TLS_LDM) |
| 1348 | htab->tls_ldm_got.refcount += 1; |
| 1349 | else |
| 1350 | local_got_refcounts[r_symndx] += 1; |
| 1351 | |
| 1352 | hppa_elf_local_got_tls_type (abfd) [r_symndx] |= tls_type; |
| 1353 | } |
| 1354 | } |
| 1355 | |
| 1356 | if (need_entry & NEED_PLT) |
| 1357 | { |
| 1358 | /* If we are creating a shared library, and this is a reloc |
| 1359 | against a weak symbol or a global symbol in a dynamic |
| 1360 | object, then we will be creating an import stub and a |
| 1361 | .plt entry for the symbol. Similarly, on a normal link |
| 1362 | to symbols defined in a dynamic object we'll need the |
| 1363 | import stub and a .plt entry. We don't know yet whether |
| 1364 | the symbol is defined or not, so make an entry anyway and |
| 1365 | clean up later in adjust_dynamic_symbol. */ |
| 1366 | if ((sec->flags & SEC_ALLOC) != 0) |
| 1367 | { |
| 1368 | if (hh != NULL) |
| 1369 | { |
| 1370 | hh->eh.needs_plt = 1; |
| 1371 | hh->eh.plt.refcount += 1; |
| 1372 | |
| 1373 | /* If this .plt entry is for a plabel, mark it so |
| 1374 | that adjust_dynamic_symbol will keep the entry |
| 1375 | even if it appears to be local. */ |
| 1376 | if (need_entry & PLT_PLABEL) |
| 1377 | hh->plabel = 1; |
| 1378 | } |
| 1379 | else if (need_entry & PLT_PLABEL) |
| 1380 | { |
| 1381 | bfd_signed_vma *local_got_refcounts; |
| 1382 | bfd_signed_vma *local_plt_refcounts; |
| 1383 | |
| 1384 | local_got_refcounts = hppa32_elf_local_refcounts (abfd); |
| 1385 | if (local_got_refcounts == NULL) |
| 1386 | return FALSE; |
| 1387 | local_plt_refcounts = (local_got_refcounts |
| 1388 | + symtab_hdr->sh_info); |
| 1389 | local_plt_refcounts[r_symndx] += 1; |
| 1390 | } |
| 1391 | } |
| 1392 | } |
| 1393 | |
| 1394 | if ((need_entry & NEED_DYNREL) != 0 |
| 1395 | && (sec->flags & SEC_ALLOC) != 0) |
| 1396 | { |
| 1397 | /* Flag this symbol as having a non-got, non-plt reference |
| 1398 | so that we generate copy relocs if it turns out to be |
| 1399 | dynamic. */ |
| 1400 | if (hh != NULL) |
| 1401 | hh->eh.non_got_ref = 1; |
| 1402 | |
| 1403 | /* If we are creating a shared library then we need to copy |
| 1404 | the reloc into the shared library. However, if we are |
| 1405 | linking with -Bsymbolic, we need only copy absolute |
| 1406 | relocs or relocs against symbols that are not defined in |
| 1407 | an object we are including in the link. PC- or DP- or |
| 1408 | DLT-relative relocs against any local sym or global sym |
| 1409 | with DEF_REGULAR set, can be discarded. At this point we |
| 1410 | have not seen all the input files, so it is possible that |
| 1411 | DEF_REGULAR is not set now but will be set later (it is |
| 1412 | never cleared). We account for that possibility below by |
| 1413 | storing information in the dyn_relocs field of the |
| 1414 | hash table entry. |
| 1415 | |
| 1416 | A similar situation to the -Bsymbolic case occurs when |
| 1417 | creating shared libraries and symbol visibility changes |
| 1418 | render the symbol local. |
| 1419 | |
| 1420 | As it turns out, all the relocs we will be creating here |
| 1421 | are absolute, so we cannot remove them on -Bsymbolic |
| 1422 | links or visibility changes anyway. A STUB_REL reloc |
| 1423 | is absolute too, as in that case it is the reloc in the |
| 1424 | stub we will be creating, rather than copying the PCREL |
| 1425 | reloc in the branch. |
| 1426 | |
| 1427 | If on the other hand, we are creating an executable, we |
| 1428 | may need to keep relocations for symbols satisfied by a |
| 1429 | dynamic library if we manage to avoid copy relocs for the |
| 1430 | symbol. */ |
| 1431 | if ((bfd_link_pic (info) |
| 1432 | && (IS_ABSOLUTE_RELOC (r_type) |
| 1433 | || (hh != NULL |
| 1434 | && (!SYMBOLIC_BIND (info, &hh->eh) |
| 1435 | || hh->eh.root.type == bfd_link_hash_defweak |
| 1436 | || !hh->eh.def_regular)))) |
| 1437 | || (ELIMINATE_COPY_RELOCS |
| 1438 | && !bfd_link_pic (info) |
| 1439 | && hh != NULL |
| 1440 | && (hh->eh.root.type == bfd_link_hash_defweak |
| 1441 | || !hh->eh.def_regular))) |
| 1442 | { |
| 1443 | struct elf_dyn_relocs *hdh_p; |
| 1444 | struct elf_dyn_relocs **hdh_head; |
| 1445 | |
| 1446 | /* Create a reloc section in dynobj and make room for |
| 1447 | this reloc. */ |
| 1448 | if (sreloc == NULL) |
| 1449 | { |
| 1450 | sreloc = _bfd_elf_make_dynamic_reloc_section |
| 1451 | (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE); |
| 1452 | |
| 1453 | if (sreloc == NULL) |
| 1454 | { |
| 1455 | bfd_set_error (bfd_error_bad_value); |
| 1456 | return FALSE; |
| 1457 | } |
| 1458 | } |
| 1459 | |
| 1460 | /* If this is a global symbol, we count the number of |
| 1461 | relocations we need for this symbol. */ |
| 1462 | if (hh != NULL) |
| 1463 | { |
| 1464 | hdh_head = &hh->dyn_relocs; |
| 1465 | } |
| 1466 | else |
| 1467 | { |
| 1468 | /* Track dynamic relocs needed for local syms too. |
| 1469 | We really need local syms available to do this |
| 1470 | easily. Oh well. */ |
| 1471 | asection *sr; |
| 1472 | void *vpp; |
| 1473 | Elf_Internal_Sym *isym; |
| 1474 | |
| 1475 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 1476 | abfd, r_symndx); |
| 1477 | if (isym == NULL) |
| 1478 | return FALSE; |
| 1479 | |
| 1480 | sr = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 1481 | if (sr == NULL) |
| 1482 | sr = sec; |
| 1483 | |
| 1484 | vpp = &elf_section_data (sr)->local_dynrel; |
| 1485 | hdh_head = (struct elf_dyn_relocs **) vpp; |
| 1486 | } |
| 1487 | |
| 1488 | hdh_p = *hdh_head; |
| 1489 | if (hdh_p == NULL || hdh_p->sec != sec) |
| 1490 | { |
| 1491 | hdh_p = bfd_alloc (htab->etab.dynobj, sizeof *hdh_p); |
| 1492 | if (hdh_p == NULL) |
| 1493 | return FALSE; |
| 1494 | hdh_p->next = *hdh_head; |
| 1495 | *hdh_head = hdh_p; |
| 1496 | hdh_p->sec = sec; |
| 1497 | hdh_p->count = 0; |
| 1498 | #if RELATIVE_DYNRELOCS |
| 1499 | hdh_p->pc_count = 0; |
| 1500 | #endif |
| 1501 | } |
| 1502 | |
| 1503 | hdh_p->count += 1; |
| 1504 | #if RELATIVE_DYNRELOCS |
| 1505 | if (!IS_ABSOLUTE_RELOC (rtype)) |
| 1506 | hdh_p->pc_count += 1; |
| 1507 | #endif |
| 1508 | } |
| 1509 | } |
| 1510 | } |
| 1511 | |
| 1512 | return TRUE; |
| 1513 | } |
| 1514 | |
| 1515 | /* Return the section that should be marked against garbage collection |
| 1516 | for a given relocation. */ |
| 1517 | |
| 1518 | static asection * |
| 1519 | elf32_hppa_gc_mark_hook (asection *sec, |
| 1520 | struct bfd_link_info *info, |
| 1521 | Elf_Internal_Rela *rela, |
| 1522 | struct elf_link_hash_entry *hh, |
| 1523 | Elf_Internal_Sym *sym) |
| 1524 | { |
| 1525 | if (hh != NULL) |
| 1526 | switch ((unsigned int) ELF32_R_TYPE (rela->r_info)) |
| 1527 | { |
| 1528 | case R_PARISC_GNU_VTINHERIT: |
| 1529 | case R_PARISC_GNU_VTENTRY: |
| 1530 | return NULL; |
| 1531 | } |
| 1532 | |
| 1533 | return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym); |
| 1534 | } |
| 1535 | |
| 1536 | /* Support for core dump NOTE sections. */ |
| 1537 | |
| 1538 | static bfd_boolean |
| 1539 | elf32_hppa_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| 1540 | { |
| 1541 | int offset; |
| 1542 | size_t size; |
| 1543 | |
| 1544 | switch (note->descsz) |
| 1545 | { |
| 1546 | default: |
| 1547 | return FALSE; |
| 1548 | |
| 1549 | case 396: /* Linux/hppa */ |
| 1550 | /* pr_cursig */ |
| 1551 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
| 1552 | |
| 1553 | /* pr_pid */ |
| 1554 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
| 1555 | |
| 1556 | /* pr_reg */ |
| 1557 | offset = 72; |
| 1558 | size = 320; |
| 1559 | |
| 1560 | break; |
| 1561 | } |
| 1562 | |
| 1563 | /* Make a ".reg/999" section. */ |
| 1564 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 1565 | size, note->descpos + offset); |
| 1566 | } |
| 1567 | |
| 1568 | static bfd_boolean |
| 1569 | elf32_hppa_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 1570 | { |
| 1571 | switch (note->descsz) |
| 1572 | { |
| 1573 | default: |
| 1574 | return FALSE; |
| 1575 | |
| 1576 | case 124: /* Linux/hppa elf_prpsinfo. */ |
| 1577 | elf_tdata (abfd)->core->program |
| 1578 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
| 1579 | elf_tdata (abfd)->core->command |
| 1580 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
| 1581 | } |
| 1582 | |
| 1583 | /* Note that for some reason, a spurious space is tacked |
| 1584 | onto the end of the args in some (at least one anyway) |
| 1585 | implementations, so strip it off if it exists. */ |
| 1586 | { |
| 1587 | char *command = elf_tdata (abfd)->core->command; |
| 1588 | int n = strlen (command); |
| 1589 | |
| 1590 | if (0 < n && command[n - 1] == ' ') |
| 1591 | command[n - 1] = '\0'; |
| 1592 | } |
| 1593 | |
| 1594 | return TRUE; |
| 1595 | } |
| 1596 | |
| 1597 | /* Our own version of hide_symbol, so that we can keep plt entries for |
| 1598 | plabels. */ |
| 1599 | |
| 1600 | static void |
| 1601 | elf32_hppa_hide_symbol (struct bfd_link_info *info, |
| 1602 | struct elf_link_hash_entry *eh, |
| 1603 | bfd_boolean force_local) |
| 1604 | { |
| 1605 | if (force_local) |
| 1606 | { |
| 1607 | eh->forced_local = 1; |
| 1608 | if (eh->dynindx != -1) |
| 1609 | { |
| 1610 | eh->dynindx = -1; |
| 1611 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, |
| 1612 | eh->dynstr_index); |
| 1613 | } |
| 1614 | |
| 1615 | /* PR 16082: Remove version information from hidden symbol. */ |
| 1616 | eh->verinfo.verdef = NULL; |
| 1617 | eh->verinfo.vertree = NULL; |
| 1618 | } |
| 1619 | |
| 1620 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
| 1621 | if (! hppa_elf_hash_entry (eh)->plabel |
| 1622 | && eh->type != STT_GNU_IFUNC) |
| 1623 | { |
| 1624 | eh->needs_plt = 0; |
| 1625 | eh->plt = elf_hash_table (info)->init_plt_offset; |
| 1626 | } |
| 1627 | } |
| 1628 | |
| 1629 | /* Find any dynamic relocs that apply to read-only sections. */ |
| 1630 | |
| 1631 | static asection * |
| 1632 | readonly_dynrelocs (struct elf_link_hash_entry *eh) |
| 1633 | { |
| 1634 | struct elf32_hppa_link_hash_entry *hh; |
| 1635 | struct elf_dyn_relocs *hdh_p; |
| 1636 | |
| 1637 | hh = hppa_elf_hash_entry (eh); |
| 1638 | for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->next) |
| 1639 | { |
| 1640 | asection *sec = hdh_p->sec->output_section; |
| 1641 | |
| 1642 | if (sec != NULL && (sec->flags & SEC_READONLY) != 0) |
| 1643 | return hdh_p->sec; |
| 1644 | } |
| 1645 | return NULL; |
| 1646 | } |
| 1647 | |
| 1648 | /* Return true if we have dynamic relocs against H or any of its weak |
| 1649 | aliases, that apply to read-only sections. Cannot be used after |
| 1650 | size_dynamic_sections. */ |
| 1651 | |
| 1652 | static bfd_boolean |
| 1653 | alias_readonly_dynrelocs (struct elf_link_hash_entry *eh) |
| 1654 | { |
| 1655 | struct elf32_hppa_link_hash_entry *hh = hppa_elf_hash_entry (eh); |
| 1656 | do |
| 1657 | { |
| 1658 | if (readonly_dynrelocs (&hh->eh)) |
| 1659 | return TRUE; |
| 1660 | hh = hppa_elf_hash_entry (hh->eh.u.alias); |
| 1661 | } while (hh != NULL && &hh->eh != eh); |
| 1662 | |
| 1663 | return FALSE; |
| 1664 | } |
| 1665 | |
| 1666 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 1667 | regular object. The current definition is in some section of the |
| 1668 | dynamic object, but we're not including those sections. We have to |
| 1669 | change the definition to something the rest of the link can |
| 1670 | understand. */ |
| 1671 | |
| 1672 | static bfd_boolean |
| 1673 | elf32_hppa_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 1674 | struct elf_link_hash_entry *eh) |
| 1675 | { |
| 1676 | struct elf32_hppa_link_hash_table *htab; |
| 1677 | asection *sec, *srel; |
| 1678 | |
| 1679 | /* If this is a function, put it in the procedure linkage table. We |
| 1680 | will fill in the contents of the procedure linkage table later. */ |
| 1681 | if (eh->type == STT_FUNC |
| 1682 | || eh->needs_plt) |
| 1683 | { |
| 1684 | bfd_boolean local = (SYMBOL_CALLS_LOCAL (info, eh) |
| 1685 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, eh)); |
| 1686 | /* Discard dyn_relocs when non-pic if we've decided that a |
| 1687 | function symbol is local. */ |
| 1688 | if (!bfd_link_pic (info) && local) |
| 1689 | hppa_elf_hash_entry (eh)->dyn_relocs = NULL; |
| 1690 | |
| 1691 | /* If the symbol is used by a plabel, we must allocate a PLT slot. |
| 1692 | The refcounts are not reliable when it has been hidden since |
| 1693 | hide_symbol can be called before the plabel flag is set. */ |
| 1694 | if (hppa_elf_hash_entry (eh)->plabel) |
| 1695 | eh->plt.refcount = 1; |
| 1696 | |
| 1697 | /* Note that unlike some other backends, the refcount is not |
| 1698 | incremented for a non-call (and non-plabel) function reference. */ |
| 1699 | else if (eh->plt.refcount <= 0 |
| 1700 | || local) |
| 1701 | { |
| 1702 | /* The .plt entry is not needed when: |
| 1703 | a) Garbage collection has removed all references to the |
| 1704 | symbol, or |
| 1705 | b) We know for certain the symbol is defined in this |
| 1706 | object, and it's not a weak definition, nor is the symbol |
| 1707 | used by a plabel relocation. Either this object is the |
| 1708 | application or we are doing a shared symbolic link. */ |
| 1709 | eh->plt.offset = (bfd_vma) -1; |
| 1710 | eh->needs_plt = 0; |
| 1711 | } |
| 1712 | |
| 1713 | /* Unlike other targets, elf32-hppa.c does not define a function |
| 1714 | symbol in a non-pic executable on PLT stub code, so we don't |
| 1715 | have a local definition in that case. ie. dyn_relocs can't |
| 1716 | be discarded. */ |
| 1717 | |
| 1718 | /* Function symbols can't have copy relocs. */ |
| 1719 | return TRUE; |
| 1720 | } |
| 1721 | else |
| 1722 | eh->plt.offset = (bfd_vma) -1; |
| 1723 | |
| 1724 | htab = hppa_link_hash_table (info); |
| 1725 | if (htab == NULL) |
| 1726 | return FALSE; |
| 1727 | |
| 1728 | /* If this is a weak symbol, and there is a real definition, the |
| 1729 | processor independent code will have arranged for us to see the |
| 1730 | real definition first, and we can just use the same value. */ |
| 1731 | if (eh->is_weakalias) |
| 1732 | { |
| 1733 | struct elf_link_hash_entry *def = weakdef (eh); |
| 1734 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
| 1735 | eh->root.u.def.section = def->root.u.def.section; |
| 1736 | eh->root.u.def.value = def->root.u.def.value; |
| 1737 | if (def->root.u.def.section == htab->etab.sdynbss |
| 1738 | || def->root.u.def.section == htab->etab.sdynrelro) |
| 1739 | hppa_elf_hash_entry (eh)->dyn_relocs = NULL; |
| 1740 | return TRUE; |
| 1741 | } |
| 1742 | |
| 1743 | /* This is a reference to a symbol defined by a dynamic object which |
| 1744 | is not a function. */ |
| 1745 | |
| 1746 | /* If we are creating a shared library, we must presume that the |
| 1747 | only references to the symbol are via the global offset table. |
| 1748 | For such cases we need not do anything here; the relocations will |
| 1749 | be handled correctly by relocate_section. */ |
| 1750 | if (bfd_link_pic (info)) |
| 1751 | return TRUE; |
| 1752 | |
| 1753 | /* If there are no references to this symbol that do not use the |
| 1754 | GOT, we don't need to generate a copy reloc. */ |
| 1755 | if (!eh->non_got_ref) |
| 1756 | return TRUE; |
| 1757 | |
| 1758 | /* If -z nocopyreloc was given, we won't generate them either. */ |
| 1759 | if (info->nocopyreloc) |
| 1760 | return TRUE; |
| 1761 | |
| 1762 | /* If we don't find any dynamic relocs in read-only sections, then |
| 1763 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
| 1764 | if (ELIMINATE_COPY_RELOCS |
| 1765 | && !alias_readonly_dynrelocs (eh)) |
| 1766 | return TRUE; |
| 1767 | |
| 1768 | /* We must allocate the symbol in our .dynbss section, which will |
| 1769 | become part of the .bss section of the executable. There will be |
| 1770 | an entry for this symbol in the .dynsym section. The dynamic |
| 1771 | object will contain position independent code, so all references |
| 1772 | from the dynamic object to this symbol will go through the global |
| 1773 | offset table. The dynamic linker will use the .dynsym entry to |
| 1774 | determine the address it must put in the global offset table, so |
| 1775 | both the dynamic object and the regular object will refer to the |
| 1776 | same memory location for the variable. */ |
| 1777 | if ((eh->root.u.def.section->flags & SEC_READONLY) != 0) |
| 1778 | { |
| 1779 | sec = htab->etab.sdynrelro; |
| 1780 | srel = htab->etab.sreldynrelro; |
| 1781 | } |
| 1782 | else |
| 1783 | { |
| 1784 | sec = htab->etab.sdynbss; |
| 1785 | srel = htab->etab.srelbss; |
| 1786 | } |
| 1787 | if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0) |
| 1788 | { |
| 1789 | /* We must generate a COPY reloc to tell the dynamic linker to |
| 1790 | copy the initial value out of the dynamic object and into the |
| 1791 | runtime process image. */ |
| 1792 | srel->size += sizeof (Elf32_External_Rela); |
| 1793 | eh->needs_copy = 1; |
| 1794 | } |
| 1795 | |
| 1796 | /* We no longer want dyn_relocs. */ |
| 1797 | hppa_elf_hash_entry (eh)->dyn_relocs = NULL; |
| 1798 | return _bfd_elf_adjust_dynamic_copy (info, eh, sec); |
| 1799 | } |
| 1800 | |
| 1801 | /* If EH is undefined, make it dynamic if that makes sense. */ |
| 1802 | |
| 1803 | static bfd_boolean |
| 1804 | ensure_undef_dynamic (struct bfd_link_info *info, |
| 1805 | struct elf_link_hash_entry *eh) |
| 1806 | { |
| 1807 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 1808 | |
| 1809 | if (htab->dynamic_sections_created |
| 1810 | && (eh->root.type == bfd_link_hash_undefweak |
| 1811 | || eh->root.type == bfd_link_hash_undefined) |
| 1812 | && eh->dynindx == -1 |
| 1813 | && !eh->forced_local |
| 1814 | && eh->type != STT_PARISC_MILLI |
| 1815 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, eh) |
| 1816 | && ELF_ST_VISIBILITY (eh->other) == STV_DEFAULT) |
| 1817 | return bfd_elf_link_record_dynamic_symbol (info, eh); |
| 1818 | return TRUE; |
| 1819 | } |
| 1820 | |
| 1821 | /* Allocate space in the .plt for entries that won't have relocations. |
| 1822 | ie. plabel entries. */ |
| 1823 | |
| 1824 | static bfd_boolean |
| 1825 | allocate_plt_static (struct elf_link_hash_entry *eh, void *inf) |
| 1826 | { |
| 1827 | struct bfd_link_info *info; |
| 1828 | struct elf32_hppa_link_hash_table *htab; |
| 1829 | struct elf32_hppa_link_hash_entry *hh; |
| 1830 | asection *sec; |
| 1831 | |
| 1832 | if (eh->root.type == bfd_link_hash_indirect) |
| 1833 | return TRUE; |
| 1834 | |
| 1835 | info = (struct bfd_link_info *) inf; |
| 1836 | hh = hppa_elf_hash_entry (eh); |
| 1837 | htab = hppa_link_hash_table (info); |
| 1838 | if (htab == NULL) |
| 1839 | return FALSE; |
| 1840 | |
| 1841 | if (htab->etab.dynamic_sections_created |
| 1842 | && eh->plt.refcount > 0) |
| 1843 | { |
| 1844 | if (!ensure_undef_dynamic (info, eh)) |
| 1845 | return FALSE; |
| 1846 | |
| 1847 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), eh)) |
| 1848 | { |
| 1849 | /* Allocate these later. From this point on, h->plabel |
| 1850 | means that the plt entry is only used by a plabel. |
| 1851 | We'll be using a normal plt entry for this symbol, so |
| 1852 | clear the plabel indicator. */ |
| 1853 | |
| 1854 | hh->plabel = 0; |
| 1855 | } |
| 1856 | else if (hh->plabel) |
| 1857 | { |
| 1858 | /* Make an entry in the .plt section for plabel references |
| 1859 | that won't have a .plt entry for other reasons. */ |
| 1860 | sec = htab->etab.splt; |
| 1861 | eh->plt.offset = sec->size; |
| 1862 | sec->size += PLT_ENTRY_SIZE; |
| 1863 | if (bfd_link_pic (info)) |
| 1864 | htab->etab.srelplt->size += sizeof (Elf32_External_Rela); |
| 1865 | } |
| 1866 | else |
| 1867 | { |
| 1868 | /* No .plt entry needed. */ |
| 1869 | eh->plt.offset = (bfd_vma) -1; |
| 1870 | eh->needs_plt = 0; |
| 1871 | } |
| 1872 | } |
| 1873 | else |
| 1874 | { |
| 1875 | eh->plt.offset = (bfd_vma) -1; |
| 1876 | eh->needs_plt = 0; |
| 1877 | } |
| 1878 | |
| 1879 | return TRUE; |
| 1880 | } |
| 1881 | |
| 1882 | /* Calculate size of GOT entries for symbol given its TLS_TYPE. */ |
| 1883 | |
| 1884 | static inline unsigned int |
| 1885 | got_entries_needed (int tls_type) |
| 1886 | { |
| 1887 | unsigned int need = 0; |
| 1888 | |
| 1889 | if ((tls_type & GOT_NORMAL) != 0) |
| 1890 | need += GOT_ENTRY_SIZE; |
| 1891 | if ((tls_type & GOT_TLS_GD) != 0) |
| 1892 | need += GOT_ENTRY_SIZE * 2; |
| 1893 | if ((tls_type & GOT_TLS_IE) != 0) |
| 1894 | need += GOT_ENTRY_SIZE; |
| 1895 | return need; |
| 1896 | } |
| 1897 | |
| 1898 | /* Calculate size of relocs needed for symbol given its TLS_TYPE and |
| 1899 | NEEDed GOT entries. TPREL_KNOWN says a TPREL offset can be |
| 1900 | calculated at link time. DTPREL_KNOWN says the same for a DTPREL |
| 1901 | offset. */ |
| 1902 | |
| 1903 | static inline unsigned int |
| 1904 | got_relocs_needed (int tls_type, unsigned int need, |
| 1905 | bfd_boolean dtprel_known, bfd_boolean tprel_known) |
| 1906 | { |
| 1907 | /* All the entries we allocated need relocs. |
| 1908 | Except for GD and IE with local symbols. */ |
| 1909 | if ((tls_type & GOT_TLS_GD) != 0 && dtprel_known) |
| 1910 | need -= GOT_ENTRY_SIZE; |
| 1911 | if ((tls_type & GOT_TLS_IE) != 0 && tprel_known) |
| 1912 | need -= GOT_ENTRY_SIZE; |
| 1913 | return need * sizeof (Elf32_External_Rela) / GOT_ENTRY_SIZE; |
| 1914 | } |
| 1915 | |
| 1916 | /* Allocate space in .plt, .got and associated reloc sections for |
| 1917 | global syms. */ |
| 1918 | |
| 1919 | static bfd_boolean |
| 1920 | allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf) |
| 1921 | { |
| 1922 | struct bfd_link_info *info; |
| 1923 | struct elf32_hppa_link_hash_table *htab; |
| 1924 | asection *sec; |
| 1925 | struct elf32_hppa_link_hash_entry *hh; |
| 1926 | struct elf_dyn_relocs *hdh_p; |
| 1927 | |
| 1928 | if (eh->root.type == bfd_link_hash_indirect) |
| 1929 | return TRUE; |
| 1930 | |
| 1931 | info = inf; |
| 1932 | htab = hppa_link_hash_table (info); |
| 1933 | if (htab == NULL) |
| 1934 | return FALSE; |
| 1935 | |
| 1936 | hh = hppa_elf_hash_entry (eh); |
| 1937 | |
| 1938 | if (htab->etab.dynamic_sections_created |
| 1939 | && eh->plt.offset != (bfd_vma) -1 |
| 1940 | && !hh->plabel |
| 1941 | && eh->plt.refcount > 0) |
| 1942 | { |
| 1943 | /* Make an entry in the .plt section. */ |
| 1944 | sec = htab->etab.splt; |
| 1945 | eh->plt.offset = sec->size; |
| 1946 | sec->size += PLT_ENTRY_SIZE; |
| 1947 | |
| 1948 | /* We also need to make an entry in the .rela.plt section. */ |
| 1949 | htab->etab.srelplt->size += sizeof (Elf32_External_Rela); |
| 1950 | htab->need_plt_stub = 1; |
| 1951 | } |
| 1952 | |
| 1953 | if (eh->got.refcount > 0) |
| 1954 | { |
| 1955 | unsigned int need; |
| 1956 | |
| 1957 | if (!ensure_undef_dynamic (info, eh)) |
| 1958 | return FALSE; |
| 1959 | |
| 1960 | sec = htab->etab.sgot; |
| 1961 | eh->got.offset = sec->size; |
| 1962 | need = got_entries_needed (hh->tls_type); |
| 1963 | sec->size += need; |
| 1964 | if (htab->etab.dynamic_sections_created |
| 1965 | && (bfd_link_dll (info) |
| 1966 | || (bfd_link_pic (info) && (hh->tls_type & GOT_NORMAL) != 0) |
| 1967 | || (eh->dynindx != -1 |
| 1968 | && !SYMBOL_REFERENCES_LOCAL (info, eh))) |
| 1969 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, eh)) |
| 1970 | { |
| 1971 | bfd_boolean local = SYMBOL_REFERENCES_LOCAL (info, eh); |
| 1972 | htab->etab.srelgot->size |
| 1973 | += got_relocs_needed (hh->tls_type, need, local, |
| 1974 | local && bfd_link_executable (info)); |
| 1975 | } |
| 1976 | } |
| 1977 | else |
| 1978 | eh->got.offset = (bfd_vma) -1; |
| 1979 | |
| 1980 | /* If no dynamic sections we can't have dynamic relocs. */ |
| 1981 | if (!htab->etab.dynamic_sections_created) |
| 1982 | hh->dyn_relocs = NULL; |
| 1983 | |
| 1984 | /* Discard relocs on undefined syms with non-default visibility. */ |
| 1985 | else if ((eh->root.type == bfd_link_hash_undefined |
| 1986 | && ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT) |
| 1987 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, eh)) |
| 1988 | hh->dyn_relocs = NULL; |
| 1989 | |
| 1990 | if (hh->dyn_relocs == NULL) |
| 1991 | return TRUE; |
| 1992 | |
| 1993 | /* If this is a -Bsymbolic shared link, then we need to discard all |
| 1994 | space allocated for dynamic pc-relative relocs against symbols |
| 1995 | defined in a regular object. For the normal shared case, discard |
| 1996 | space for relocs that have become local due to symbol visibility |
| 1997 | changes. */ |
| 1998 | if (bfd_link_pic (info)) |
| 1999 | { |
| 2000 | #if RELATIVE_DYNRELOCS |
| 2001 | if (SYMBOL_CALLS_LOCAL (info, eh)) |
| 2002 | { |
| 2003 | struct elf_dyn_relocs **hdh_pp; |
| 2004 | |
| 2005 | for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; ) |
| 2006 | { |
| 2007 | hdh_p->count -= hdh_p->pc_count; |
| 2008 | hdh_p->pc_count = 0; |
| 2009 | if (hdh_p->count == 0) |
| 2010 | *hdh_pp = hdh_p->next; |
| 2011 | else |
| 2012 | hdh_pp = &hdh_p->next; |
| 2013 | } |
| 2014 | } |
| 2015 | #endif |
| 2016 | |
| 2017 | if (hh->dyn_relocs != NULL) |
| 2018 | { |
| 2019 | if (!ensure_undef_dynamic (info, eh)) |
| 2020 | return FALSE; |
| 2021 | } |
| 2022 | } |
| 2023 | else if (ELIMINATE_COPY_RELOCS) |
| 2024 | { |
| 2025 | /* For the non-shared case, discard space for relocs against |
| 2026 | symbols which turn out to need copy relocs or are not |
| 2027 | dynamic. */ |
| 2028 | |
| 2029 | if (eh->dynamic_adjusted |
| 2030 | && !eh->def_regular |
| 2031 | && !ELF_COMMON_DEF_P (eh)) |
| 2032 | { |
| 2033 | if (!ensure_undef_dynamic (info, eh)) |
| 2034 | return FALSE; |
| 2035 | |
| 2036 | if (eh->dynindx == -1) |
| 2037 | hh->dyn_relocs = NULL; |
| 2038 | } |
| 2039 | else |
| 2040 | hh->dyn_relocs = NULL; |
| 2041 | } |
| 2042 | |
| 2043 | /* Finally, allocate space. */ |
| 2044 | for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->next) |
| 2045 | { |
| 2046 | asection *sreloc = elf_section_data (hdh_p->sec)->sreloc; |
| 2047 | sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela); |
| 2048 | } |
| 2049 | |
| 2050 | return TRUE; |
| 2051 | } |
| 2052 | |
| 2053 | /* This function is called via elf_link_hash_traverse to force |
| 2054 | millicode symbols local so they do not end up as globals in the |
| 2055 | dynamic symbol table. We ought to be able to do this in |
| 2056 | adjust_dynamic_symbol, but our adjust_dynamic_symbol is not called |
| 2057 | for all dynamic symbols. Arguably, this is a bug in |
| 2058 | elf_adjust_dynamic_symbol. */ |
| 2059 | |
| 2060 | static bfd_boolean |
| 2061 | clobber_millicode_symbols (struct elf_link_hash_entry *eh, |
| 2062 | struct bfd_link_info *info) |
| 2063 | { |
| 2064 | if (eh->type == STT_PARISC_MILLI |
| 2065 | && !eh->forced_local) |
| 2066 | { |
| 2067 | elf32_hppa_hide_symbol (info, eh, TRUE); |
| 2068 | } |
| 2069 | return TRUE; |
| 2070 | } |
| 2071 | |
| 2072 | /* Set DF_TEXTREL if we find any dynamic relocs that apply to |
| 2073 | read-only sections. */ |
| 2074 | |
| 2075 | static bfd_boolean |
| 2076 | maybe_set_textrel (struct elf_link_hash_entry *eh, void *inf) |
| 2077 | { |
| 2078 | asection *sec; |
| 2079 | |
| 2080 | if (eh->root.type == bfd_link_hash_indirect) |
| 2081 | return TRUE; |
| 2082 | |
| 2083 | sec = readonly_dynrelocs (eh); |
| 2084 | if (sec != NULL) |
| 2085 | { |
| 2086 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| 2087 | |
| 2088 | info->flags |= DF_TEXTREL; |
| 2089 | info->callbacks->minfo |
| 2090 | (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"), |
| 2091 | sec->owner, eh->root.root.string, sec); |
| 2092 | |
| 2093 | /* Not an error, just cut short the traversal. */ |
| 2094 | return FALSE; |
| 2095 | } |
| 2096 | return TRUE; |
| 2097 | } |
| 2098 | |
| 2099 | /* Set the sizes of the dynamic sections. */ |
| 2100 | |
| 2101 | static bfd_boolean |
| 2102 | elf32_hppa_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 2103 | struct bfd_link_info *info) |
| 2104 | { |
| 2105 | struct elf32_hppa_link_hash_table *htab; |
| 2106 | bfd *dynobj; |
| 2107 | bfd *ibfd; |
| 2108 | asection *sec; |
| 2109 | bfd_boolean relocs; |
| 2110 | |
| 2111 | htab = hppa_link_hash_table (info); |
| 2112 | if (htab == NULL) |
| 2113 | return FALSE; |
| 2114 | |
| 2115 | dynobj = htab->etab.dynobj; |
| 2116 | if (dynobj == NULL) |
| 2117 | abort (); |
| 2118 | |
| 2119 | if (htab->etab.dynamic_sections_created) |
| 2120 | { |
| 2121 | /* Set the contents of the .interp section to the interpreter. */ |
| 2122 | if (bfd_link_executable (info) && !info->nointerp) |
| 2123 | { |
| 2124 | sec = bfd_get_linker_section (dynobj, ".interp"); |
| 2125 | if (sec == NULL) |
| 2126 | abort (); |
| 2127 | sec->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 2128 | sec->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 2129 | } |
| 2130 | |
| 2131 | /* Force millicode symbols local. */ |
| 2132 | elf_link_hash_traverse (&htab->etab, |
| 2133 | clobber_millicode_symbols, |
| 2134 | info); |
| 2135 | } |
| 2136 | |
| 2137 | /* Set up .got and .plt offsets for local syms, and space for local |
| 2138 | dynamic relocs. */ |
| 2139 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 2140 | { |
| 2141 | bfd_signed_vma *local_got; |
| 2142 | bfd_signed_vma *end_local_got; |
| 2143 | bfd_signed_vma *local_plt; |
| 2144 | bfd_signed_vma *end_local_plt; |
| 2145 | bfd_size_type locsymcount; |
| 2146 | Elf_Internal_Shdr *symtab_hdr; |
| 2147 | asection *srel; |
| 2148 | char *local_tls_type; |
| 2149 | |
| 2150 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
| 2151 | continue; |
| 2152 | |
| 2153 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 2154 | { |
| 2155 | struct elf_dyn_relocs *hdh_p; |
| 2156 | |
| 2157 | for (hdh_p = ((struct elf_dyn_relocs *) |
| 2158 | elf_section_data (sec)->local_dynrel); |
| 2159 | hdh_p != NULL; |
| 2160 | hdh_p = hdh_p->next) |
| 2161 | { |
| 2162 | if (!bfd_is_abs_section (hdh_p->sec) |
| 2163 | && bfd_is_abs_section (hdh_p->sec->output_section)) |
| 2164 | { |
| 2165 | /* Input section has been discarded, either because |
| 2166 | it is a copy of a linkonce section or due to |
| 2167 | linker script /DISCARD/, so we'll be discarding |
| 2168 | the relocs too. */ |
| 2169 | } |
| 2170 | else if (hdh_p->count != 0) |
| 2171 | { |
| 2172 | srel = elf_section_data (hdh_p->sec)->sreloc; |
| 2173 | srel->size += hdh_p->count * sizeof (Elf32_External_Rela); |
| 2174 | if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0) |
| 2175 | info->flags |= DF_TEXTREL; |
| 2176 | } |
| 2177 | } |
| 2178 | } |
| 2179 | |
| 2180 | local_got = elf_local_got_refcounts (ibfd); |
| 2181 | if (!local_got) |
| 2182 | continue; |
| 2183 | |
| 2184 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 2185 | locsymcount = symtab_hdr->sh_info; |
| 2186 | end_local_got = local_got + locsymcount; |
| 2187 | local_tls_type = hppa_elf_local_got_tls_type (ibfd); |
| 2188 | sec = htab->etab.sgot; |
| 2189 | srel = htab->etab.srelgot; |
| 2190 | for (; local_got < end_local_got; ++local_got) |
| 2191 | { |
| 2192 | if (*local_got > 0) |
| 2193 | { |
| 2194 | unsigned int need; |
| 2195 | |
| 2196 | *local_got = sec->size; |
| 2197 | need = got_entries_needed (*local_tls_type); |
| 2198 | sec->size += need; |
| 2199 | if (bfd_link_dll (info) |
| 2200 | || (bfd_link_pic (info) |
| 2201 | && (*local_tls_type & GOT_NORMAL) != 0)) |
| 2202 | htab->etab.srelgot->size |
| 2203 | += got_relocs_needed (*local_tls_type, need, TRUE, |
| 2204 | bfd_link_executable (info)); |
| 2205 | } |
| 2206 | else |
| 2207 | *local_got = (bfd_vma) -1; |
| 2208 | |
| 2209 | ++local_tls_type; |
| 2210 | } |
| 2211 | |
| 2212 | local_plt = end_local_got; |
| 2213 | end_local_plt = local_plt + locsymcount; |
| 2214 | if (! htab->etab.dynamic_sections_created) |
| 2215 | { |
| 2216 | /* Won't be used, but be safe. */ |
| 2217 | for (; local_plt < end_local_plt; ++local_plt) |
| 2218 | *local_plt = (bfd_vma) -1; |
| 2219 | } |
| 2220 | else |
| 2221 | { |
| 2222 | sec = htab->etab.splt; |
| 2223 | srel = htab->etab.srelplt; |
| 2224 | for (; local_plt < end_local_plt; ++local_plt) |
| 2225 | { |
| 2226 | if (*local_plt > 0) |
| 2227 | { |
| 2228 | *local_plt = sec->size; |
| 2229 | sec->size += PLT_ENTRY_SIZE; |
| 2230 | if (bfd_link_pic (info)) |
| 2231 | srel->size += sizeof (Elf32_External_Rela); |
| 2232 | } |
| 2233 | else |
| 2234 | *local_plt = (bfd_vma) -1; |
| 2235 | } |
| 2236 | } |
| 2237 | } |
| 2238 | |
| 2239 | if (htab->tls_ldm_got.refcount > 0) |
| 2240 | { |
| 2241 | /* Allocate 2 got entries and 1 dynamic reloc for |
| 2242 | R_PARISC_TLS_DTPMOD32 relocs. */ |
| 2243 | htab->tls_ldm_got.offset = htab->etab.sgot->size; |
| 2244 | htab->etab.sgot->size += (GOT_ENTRY_SIZE * 2); |
| 2245 | htab->etab.srelgot->size += sizeof (Elf32_External_Rela); |
| 2246 | } |
| 2247 | else |
| 2248 | htab->tls_ldm_got.offset = -1; |
| 2249 | |
| 2250 | /* Do all the .plt entries without relocs first. The dynamic linker |
| 2251 | uses the last .plt reloc to find the end of the .plt (and hence |
| 2252 | the start of the .got) for lazy linking. */ |
| 2253 | elf_link_hash_traverse (&htab->etab, allocate_plt_static, info); |
| 2254 | |
| 2255 | /* Allocate global sym .plt and .got entries, and space for global |
| 2256 | sym dynamic relocs. */ |
| 2257 | elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info); |
| 2258 | |
| 2259 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 2260 | determined the sizes of the various dynamic sections. Allocate |
| 2261 | memory for them. */ |
| 2262 | relocs = FALSE; |
| 2263 | for (sec = dynobj->sections; sec != NULL; sec = sec->next) |
| 2264 | { |
| 2265 | if ((sec->flags & SEC_LINKER_CREATED) == 0) |
| 2266 | continue; |
| 2267 | |
| 2268 | if (sec == htab->etab.splt) |
| 2269 | { |
| 2270 | if (htab->need_plt_stub) |
| 2271 | { |
| 2272 | /* Make space for the plt stub at the end of the .plt |
| 2273 | section. We want this stub right at the end, up |
| 2274 | against the .got section. */ |
| 2275 | int gotalign = bfd_section_alignment (dynobj, htab->etab.sgot); |
| 2276 | int pltalign = bfd_section_alignment (dynobj, sec); |
| 2277 | bfd_size_type mask; |
| 2278 | |
| 2279 | if (gotalign > pltalign) |
| 2280 | (void) bfd_set_section_alignment (dynobj, sec, gotalign); |
| 2281 | mask = ((bfd_size_type) 1 << gotalign) - 1; |
| 2282 | sec->size = (sec->size + sizeof (plt_stub) + mask) & ~mask; |
| 2283 | } |
| 2284 | } |
| 2285 | else if (sec == htab->etab.sgot |
| 2286 | || sec == htab->etab.sdynbss |
| 2287 | || sec == htab->etab.sdynrelro) |
| 2288 | ; |
| 2289 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, sec), ".rela")) |
| 2290 | { |
| 2291 | if (sec->size != 0) |
| 2292 | { |
| 2293 | /* Remember whether there are any reloc sections other |
| 2294 | than .rela.plt. */ |
| 2295 | if (sec != htab->etab.srelplt) |
| 2296 | relocs = TRUE; |
| 2297 | |
| 2298 | /* We use the reloc_count field as a counter if we need |
| 2299 | to copy relocs into the output file. */ |
| 2300 | sec->reloc_count = 0; |
| 2301 | } |
| 2302 | } |
| 2303 | else |
| 2304 | { |
| 2305 | /* It's not one of our sections, so don't allocate space. */ |
| 2306 | continue; |
| 2307 | } |
| 2308 | |
| 2309 | if (sec->size == 0) |
| 2310 | { |
| 2311 | /* If we don't need this section, strip it from the |
| 2312 | output file. This is mostly to handle .rela.bss and |
| 2313 | .rela.plt. We must create both sections in |
| 2314 | create_dynamic_sections, because they must be created |
| 2315 | before the linker maps input sections to output |
| 2316 | sections. The linker does that before |
| 2317 | adjust_dynamic_symbol is called, and it is that |
| 2318 | function which decides whether anything needs to go |
| 2319 | into these sections. */ |
| 2320 | sec->flags |= SEC_EXCLUDE; |
| 2321 | continue; |
| 2322 | } |
| 2323 | |
| 2324 | if ((sec->flags & SEC_HAS_CONTENTS) == 0) |
| 2325 | continue; |
| 2326 | |
| 2327 | /* Allocate memory for the section contents. Zero it, because |
| 2328 | we may not fill in all the reloc sections. */ |
| 2329 | sec->contents = bfd_zalloc (dynobj, sec->size); |
| 2330 | if (sec->contents == NULL) |
| 2331 | return FALSE; |
| 2332 | } |
| 2333 | |
| 2334 | if (htab->etab.dynamic_sections_created) |
| 2335 | { |
| 2336 | /* Like IA-64 and HPPA64, always create a DT_PLTGOT. It |
| 2337 | actually has nothing to do with the PLT, it is how we |
| 2338 | communicate the LTP value of a load module to the dynamic |
| 2339 | linker. */ |
| 2340 | #define add_dynamic_entry(TAG, VAL) \ |
| 2341 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 2342 | |
| 2343 | if (!add_dynamic_entry (DT_PLTGOT, 0)) |
| 2344 | return FALSE; |
| 2345 | |
| 2346 | /* Add some entries to the .dynamic section. We fill in the |
| 2347 | values later, in elf32_hppa_finish_dynamic_sections, but we |
| 2348 | must add the entries now so that we get the correct size for |
| 2349 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 2350 | dynamic linker and used by the debugger. */ |
| 2351 | if (bfd_link_executable (info)) |
| 2352 | { |
| 2353 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 2354 | return FALSE; |
| 2355 | } |
| 2356 | |
| 2357 | if (htab->etab.srelplt->size != 0) |
| 2358 | { |
| 2359 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) |
| 2360 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 2361 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 2362 | return FALSE; |
| 2363 | } |
| 2364 | |
| 2365 | if (relocs) |
| 2366 | { |
| 2367 | if (!add_dynamic_entry (DT_RELA, 0) |
| 2368 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 2369 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) |
| 2370 | return FALSE; |
| 2371 | |
| 2372 | /* If any dynamic relocs apply to a read-only section, |
| 2373 | then we need a DT_TEXTREL entry. */ |
| 2374 | if ((info->flags & DF_TEXTREL) == 0) |
| 2375 | elf_link_hash_traverse (&htab->etab, maybe_set_textrel, info); |
| 2376 | |
| 2377 | if ((info->flags & DF_TEXTREL) != 0) |
| 2378 | { |
| 2379 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 2380 | return FALSE; |
| 2381 | } |
| 2382 | } |
| 2383 | } |
| 2384 | #undef add_dynamic_entry |
| 2385 | |
| 2386 | return TRUE; |
| 2387 | } |
| 2388 | |
| 2389 | /* External entry points for sizing and building linker stubs. */ |
| 2390 | |
| 2391 | /* Set up various things so that we can make a list of input sections |
| 2392 | for each output section included in the link. Returns -1 on error, |
| 2393 | 0 when no stubs will be needed, and 1 on success. */ |
| 2394 | |
| 2395 | int |
| 2396 | elf32_hppa_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info) |
| 2397 | { |
| 2398 | bfd *input_bfd; |
| 2399 | unsigned int bfd_count; |
| 2400 | unsigned int top_id, top_index; |
| 2401 | asection *section; |
| 2402 | asection **input_list, **list; |
| 2403 | bfd_size_type amt; |
| 2404 | struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info); |
| 2405 | |
| 2406 | if (htab == NULL) |
| 2407 | return -1; |
| 2408 | |
| 2409 | /* Count the number of input BFDs and find the top input section id. */ |
| 2410 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; |
| 2411 | input_bfd != NULL; |
| 2412 | input_bfd = input_bfd->link.next) |
| 2413 | { |
| 2414 | bfd_count += 1; |
| 2415 | for (section = input_bfd->sections; |
| 2416 | section != NULL; |
| 2417 | section = section->next) |
| 2418 | { |
| 2419 | if (top_id < section->id) |
| 2420 | top_id = section->id; |
| 2421 | } |
| 2422 | } |
| 2423 | htab->bfd_count = bfd_count; |
| 2424 | |
| 2425 | amt = sizeof (struct map_stub) * (top_id + 1); |
| 2426 | htab->stub_group = bfd_zmalloc (amt); |
| 2427 | if (htab->stub_group == NULL) |
| 2428 | return -1; |
| 2429 | |
| 2430 | /* We can't use output_bfd->section_count here to find the top output |
| 2431 | section index as some sections may have been removed, and |
| 2432 | strip_excluded_output_sections doesn't renumber the indices. */ |
| 2433 | for (section = output_bfd->sections, top_index = 0; |
| 2434 | section != NULL; |
| 2435 | section = section->next) |
| 2436 | { |
| 2437 | if (top_index < section->index) |
| 2438 | top_index = section->index; |
| 2439 | } |
| 2440 | |
| 2441 | htab->top_index = top_index; |
| 2442 | amt = sizeof (asection *) * (top_index + 1); |
| 2443 | input_list = bfd_malloc (amt); |
| 2444 | htab->input_list = input_list; |
| 2445 | if (input_list == NULL) |
| 2446 | return -1; |
| 2447 | |
| 2448 | /* For sections we aren't interested in, mark their entries with a |
| 2449 | value we can check later. */ |
| 2450 | list = input_list + top_index; |
| 2451 | do |
| 2452 | *list = bfd_abs_section_ptr; |
| 2453 | while (list-- != input_list); |
| 2454 | |
| 2455 | for (section = output_bfd->sections; |
| 2456 | section != NULL; |
| 2457 | section = section->next) |
| 2458 | { |
| 2459 | if ((section->flags & SEC_CODE) != 0) |
| 2460 | input_list[section->index] = NULL; |
| 2461 | } |
| 2462 | |
| 2463 | return 1; |
| 2464 | } |
| 2465 | |
| 2466 | /* The linker repeatedly calls this function for each input section, |
| 2467 | in the order that input sections are linked into output sections. |
| 2468 | Build lists of input sections to determine groupings between which |
| 2469 | we may insert linker stubs. */ |
| 2470 | |
| 2471 | void |
| 2472 | elf32_hppa_next_input_section (struct bfd_link_info *info, asection *isec) |
| 2473 | { |
| 2474 | struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info); |
| 2475 | |
| 2476 | if (htab == NULL) |
| 2477 | return; |
| 2478 | |
| 2479 | if (isec->output_section->index <= htab->top_index) |
| 2480 | { |
| 2481 | asection **list = htab->input_list + isec->output_section->index; |
| 2482 | if (*list != bfd_abs_section_ptr) |
| 2483 | { |
| 2484 | /* Steal the link_sec pointer for our list. */ |
| 2485 | #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) |
| 2486 | /* This happens to make the list in reverse order, |
| 2487 | which is what we want. */ |
| 2488 | PREV_SEC (isec) = *list; |
| 2489 | *list = isec; |
| 2490 | } |
| 2491 | } |
| 2492 | } |
| 2493 | |
| 2494 | /* See whether we can group stub sections together. Grouping stub |
| 2495 | sections may result in fewer stubs. More importantly, we need to |
| 2496 | put all .init* and .fini* stubs at the beginning of the .init or |
| 2497 | .fini output sections respectively, because glibc splits the |
| 2498 | _init and _fini functions into multiple parts. Putting a stub in |
| 2499 | the middle of a function is not a good idea. */ |
| 2500 | |
| 2501 | static void |
| 2502 | group_sections (struct elf32_hppa_link_hash_table *htab, |
| 2503 | bfd_size_type stub_group_size, |
| 2504 | bfd_boolean stubs_always_before_branch) |
| 2505 | { |
| 2506 | asection **list = htab->input_list + htab->top_index; |
| 2507 | do |
| 2508 | { |
| 2509 | asection *tail = *list; |
| 2510 | if (tail == bfd_abs_section_ptr) |
| 2511 | continue; |
| 2512 | while (tail != NULL) |
| 2513 | { |
| 2514 | asection *curr; |
| 2515 | asection *prev; |
| 2516 | bfd_size_type total; |
| 2517 | bfd_boolean big_sec; |
| 2518 | |
| 2519 | curr = tail; |
| 2520 | total = tail->size; |
| 2521 | big_sec = total >= stub_group_size; |
| 2522 | |
| 2523 | while ((prev = PREV_SEC (curr)) != NULL |
| 2524 | && ((total += curr->output_offset - prev->output_offset) |
| 2525 | < stub_group_size)) |
| 2526 | curr = prev; |
| 2527 | |
| 2528 | /* OK, the size from the start of CURR to the end is less |
| 2529 | than 240000 bytes and thus can be handled by one stub |
| 2530 | section. (or the tail section is itself larger than |
| 2531 | 240000 bytes, in which case we may be toast.) |
| 2532 | We should really be keeping track of the total size of |
| 2533 | stubs added here, as stubs contribute to the final output |
| 2534 | section size. That's a little tricky, and this way will |
| 2535 | only break if stubs added total more than 22144 bytes, or |
| 2536 | 2768 long branch stubs. It seems unlikely for more than |
| 2537 | 2768 different functions to be called, especially from |
| 2538 | code only 240000 bytes long. This limit used to be |
| 2539 | 250000, but c++ code tends to generate lots of little |
| 2540 | functions, and sometimes violated the assumption. */ |
| 2541 | do |
| 2542 | { |
| 2543 | prev = PREV_SEC (tail); |
| 2544 | /* Set up this stub group. */ |
| 2545 | htab->stub_group[tail->id].link_sec = curr; |
| 2546 | } |
| 2547 | while (tail != curr && (tail = prev) != NULL); |
| 2548 | |
| 2549 | /* But wait, there's more! Input sections up to 240000 |
| 2550 | bytes before the stub section can be handled by it too. |
| 2551 | Don't do this if we have a really large section after the |
| 2552 | stubs, as adding more stubs increases the chance that |
| 2553 | branches may not reach into the stub section. */ |
| 2554 | if (!stubs_always_before_branch && !big_sec) |
| 2555 | { |
| 2556 | total = 0; |
| 2557 | while (prev != NULL |
| 2558 | && ((total += tail->output_offset - prev->output_offset) |
| 2559 | < stub_group_size)) |
| 2560 | { |
| 2561 | tail = prev; |
| 2562 | prev = PREV_SEC (tail); |
| 2563 | htab->stub_group[tail->id].link_sec = curr; |
| 2564 | } |
| 2565 | } |
| 2566 | tail = prev; |
| 2567 | } |
| 2568 | } |
| 2569 | while (list-- != htab->input_list); |
| 2570 | free (htab->input_list); |
| 2571 | #undef PREV_SEC |
| 2572 | } |
| 2573 | |
| 2574 | /* Read in all local syms for all input bfds, and create hash entries |
| 2575 | for export stubs if we are building a multi-subspace shared lib. |
| 2576 | Returns -1 on error, 1 if export stubs created, 0 otherwise. */ |
| 2577 | |
| 2578 | static int |
| 2579 | get_local_syms (bfd *output_bfd, bfd *input_bfd, struct bfd_link_info *info) |
| 2580 | { |
| 2581 | unsigned int bfd_indx; |
| 2582 | Elf_Internal_Sym *local_syms, **all_local_syms; |
| 2583 | int stub_changed = 0; |
| 2584 | struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info); |
| 2585 | |
| 2586 | if (htab == NULL) |
| 2587 | return -1; |
| 2588 | |
| 2589 | /* We want to read in symbol extension records only once. To do this |
| 2590 | we need to read in the local symbols in parallel and save them for |
| 2591 | later use; so hold pointers to the local symbols in an array. */ |
| 2592 | bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count; |
| 2593 | all_local_syms = bfd_zmalloc (amt); |
| 2594 | htab->all_local_syms = all_local_syms; |
| 2595 | if (all_local_syms == NULL) |
| 2596 | return -1; |
| 2597 | |
| 2598 | /* Walk over all the input BFDs, swapping in local symbols. |
| 2599 | If we are creating a shared library, create hash entries for the |
| 2600 | export stubs. */ |
| 2601 | for (bfd_indx = 0; |
| 2602 | input_bfd != NULL; |
| 2603 | input_bfd = input_bfd->link.next, bfd_indx++) |
| 2604 | { |
| 2605 | Elf_Internal_Shdr *symtab_hdr; |
| 2606 | |
| 2607 | /* We'll need the symbol table in a second. */ |
| 2608 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 2609 | if (symtab_hdr->sh_info == 0) |
| 2610 | continue; |
| 2611 | |
| 2612 | /* We need an array of the local symbols attached to the input bfd. */ |
| 2613 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 2614 | if (local_syms == NULL) |
| 2615 | { |
| 2616 | local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| 2617 | symtab_hdr->sh_info, 0, |
| 2618 | NULL, NULL, NULL); |
| 2619 | /* Cache them for elf_link_input_bfd. */ |
| 2620 | symtab_hdr->contents = (unsigned char *) local_syms; |
| 2621 | } |
| 2622 | if (local_syms == NULL) |
| 2623 | return -1; |
| 2624 | |
| 2625 | all_local_syms[bfd_indx] = local_syms; |
| 2626 | |
| 2627 | if (bfd_link_pic (info) && htab->multi_subspace) |
| 2628 | { |
| 2629 | struct elf_link_hash_entry **eh_syms; |
| 2630 | struct elf_link_hash_entry **eh_symend; |
| 2631 | unsigned int symcount; |
| 2632 | |
| 2633 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 2634 | - symtab_hdr->sh_info); |
| 2635 | eh_syms = (struct elf_link_hash_entry **) elf_sym_hashes (input_bfd); |
| 2636 | eh_symend = (struct elf_link_hash_entry **) (eh_syms + symcount); |
| 2637 | |
| 2638 | /* Look through the global syms for functions; We need to |
| 2639 | build export stubs for all globally visible functions. */ |
| 2640 | for (; eh_syms < eh_symend; eh_syms++) |
| 2641 | { |
| 2642 | struct elf32_hppa_link_hash_entry *hh; |
| 2643 | |
| 2644 | hh = hppa_elf_hash_entry (*eh_syms); |
| 2645 | |
| 2646 | while (hh->eh.root.type == bfd_link_hash_indirect |
| 2647 | || hh->eh.root.type == bfd_link_hash_warning) |
| 2648 | hh = hppa_elf_hash_entry (hh->eh.root.u.i.link); |
| 2649 | |
| 2650 | /* At this point in the link, undefined syms have been |
| 2651 | resolved, so we need to check that the symbol was |
| 2652 | defined in this BFD. */ |
| 2653 | if ((hh->eh.root.type == bfd_link_hash_defined |
| 2654 | || hh->eh.root.type == bfd_link_hash_defweak) |
| 2655 | && hh->eh.type == STT_FUNC |
| 2656 | && hh->eh.root.u.def.section->output_section != NULL |
| 2657 | && (hh->eh.root.u.def.section->output_section->owner |
| 2658 | == output_bfd) |
| 2659 | && hh->eh.root.u.def.section->owner == input_bfd |
| 2660 | && hh->eh.def_regular |
| 2661 | && !hh->eh.forced_local |
| 2662 | && ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT) |
| 2663 | { |
| 2664 | asection *sec; |
| 2665 | const char *stub_name; |
| 2666 | struct elf32_hppa_stub_hash_entry *hsh; |
| 2667 | |
| 2668 | sec = hh->eh.root.u.def.section; |
| 2669 | stub_name = hh_name (hh); |
| 2670 | hsh = hppa_stub_hash_lookup (&htab->bstab, |
| 2671 | stub_name, |
| 2672 | FALSE, FALSE); |
| 2673 | if (hsh == NULL) |
| 2674 | { |
| 2675 | hsh = hppa_add_stub (stub_name, sec, htab); |
| 2676 | if (!hsh) |
| 2677 | return -1; |
| 2678 | |
| 2679 | hsh->target_value = hh->eh.root.u.def.value; |
| 2680 | hsh->target_section = hh->eh.root.u.def.section; |
| 2681 | hsh->stub_type = hppa_stub_export; |
| 2682 | hsh->hh = hh; |
| 2683 | stub_changed = 1; |
| 2684 | } |
| 2685 | else |
| 2686 | { |
| 2687 | /* xgettext:c-format */ |
| 2688 | _bfd_error_handler (_("%pB: duplicate export stub %s"), |
| 2689 | input_bfd, stub_name); |
| 2690 | } |
| 2691 | } |
| 2692 | } |
| 2693 | } |
| 2694 | } |
| 2695 | |
| 2696 | return stub_changed; |
| 2697 | } |
| 2698 | |
| 2699 | /* Determine and set the size of the stub section for a final link. |
| 2700 | |
| 2701 | The basic idea here is to examine all the relocations looking for |
| 2702 | PC-relative calls to a target that is unreachable with a "bl" |
| 2703 | instruction. */ |
| 2704 | |
| 2705 | bfd_boolean |
| 2706 | elf32_hppa_size_stubs |
| 2707 | (bfd *output_bfd, bfd *stub_bfd, struct bfd_link_info *info, |
| 2708 | bfd_boolean multi_subspace, bfd_signed_vma group_size, |
| 2709 | asection * (*add_stub_section) (const char *, asection *), |
| 2710 | void (*layout_sections_again) (void)) |
| 2711 | { |
| 2712 | bfd_size_type stub_group_size; |
| 2713 | bfd_boolean stubs_always_before_branch; |
| 2714 | bfd_boolean stub_changed; |
| 2715 | struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info); |
| 2716 | |
| 2717 | if (htab == NULL) |
| 2718 | return FALSE; |
| 2719 | |
| 2720 | /* Stash our params away. */ |
| 2721 | htab->stub_bfd = stub_bfd; |
| 2722 | htab->multi_subspace = multi_subspace; |
| 2723 | htab->add_stub_section = add_stub_section; |
| 2724 | htab->layout_sections_again = layout_sections_again; |
| 2725 | stubs_always_before_branch = group_size < 0; |
| 2726 | if (group_size < 0) |
| 2727 | stub_group_size = -group_size; |
| 2728 | else |
| 2729 | stub_group_size = group_size; |
| 2730 | if (stub_group_size == 1) |
| 2731 | { |
| 2732 | /* Default values. */ |
| 2733 | if (stubs_always_before_branch) |
| 2734 | { |
| 2735 | stub_group_size = 7680000; |
| 2736 | if (htab->has_17bit_branch || htab->multi_subspace) |
| 2737 | stub_group_size = 240000; |
| 2738 | if (htab->has_12bit_branch) |
| 2739 | stub_group_size = 7500; |
| 2740 | } |
| 2741 | else |
| 2742 | { |
| 2743 | stub_group_size = 6971392; |
| 2744 | if (htab->has_17bit_branch || htab->multi_subspace) |
| 2745 | stub_group_size = 217856; |
| 2746 | if (htab->has_12bit_branch) |
| 2747 | stub_group_size = 6808; |
| 2748 | } |
| 2749 | } |
| 2750 | |
| 2751 | group_sections (htab, stub_group_size, stubs_always_before_branch); |
| 2752 | |
| 2753 | switch (get_local_syms (output_bfd, info->input_bfds, info)) |
| 2754 | { |
| 2755 | default: |
| 2756 | if (htab->all_local_syms) |
| 2757 | goto error_ret_free_local; |
| 2758 | return FALSE; |
| 2759 | |
| 2760 | case 0: |
| 2761 | stub_changed = FALSE; |
| 2762 | break; |
| 2763 | |
| 2764 | case 1: |
| 2765 | stub_changed = TRUE; |
| 2766 | break; |
| 2767 | } |
| 2768 | |
| 2769 | while (1) |
| 2770 | { |
| 2771 | bfd *input_bfd; |
| 2772 | unsigned int bfd_indx; |
| 2773 | asection *stub_sec; |
| 2774 | |
| 2775 | for (input_bfd = info->input_bfds, bfd_indx = 0; |
| 2776 | input_bfd != NULL; |
| 2777 | input_bfd = input_bfd->link.next, bfd_indx++) |
| 2778 | { |
| 2779 | Elf_Internal_Shdr *symtab_hdr; |
| 2780 | asection *section; |
| 2781 | Elf_Internal_Sym *local_syms; |
| 2782 | |
| 2783 | /* We'll need the symbol table in a second. */ |
| 2784 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 2785 | if (symtab_hdr->sh_info == 0) |
| 2786 | continue; |
| 2787 | |
| 2788 | local_syms = htab->all_local_syms[bfd_indx]; |
| 2789 | |
| 2790 | /* Walk over each section attached to the input bfd. */ |
| 2791 | for (section = input_bfd->sections; |
| 2792 | section != NULL; |
| 2793 | section = section->next) |
| 2794 | { |
| 2795 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
| 2796 | |
| 2797 | /* If there aren't any relocs, then there's nothing more |
| 2798 | to do. */ |
| 2799 | if ((section->flags & SEC_RELOC) == 0 |
| 2800 | || (section->flags & SEC_ALLOC) == 0 |
| 2801 | || (section->flags & SEC_LOAD) == 0 |
| 2802 | || (section->flags & SEC_CODE) == 0 |
| 2803 | || section->reloc_count == 0) |
| 2804 | continue; |
| 2805 | |
| 2806 | /* If this section is a link-once section that will be |
| 2807 | discarded, then don't create any stubs. */ |
| 2808 | if (section->output_section == NULL |
| 2809 | || section->output_section->owner != output_bfd) |
| 2810 | continue; |
| 2811 | |
| 2812 | /* Get the relocs. */ |
| 2813 | internal_relocs |
| 2814 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, |
| 2815 | info->keep_memory); |
| 2816 | if (internal_relocs == NULL) |
| 2817 | goto error_ret_free_local; |
| 2818 | |
| 2819 | /* Now examine each relocation. */ |
| 2820 | irela = internal_relocs; |
| 2821 | irelaend = irela + section->reloc_count; |
| 2822 | for (; irela < irelaend; irela++) |
| 2823 | { |
| 2824 | unsigned int r_type, r_indx; |
| 2825 | enum elf32_hppa_stub_type stub_type; |
| 2826 | struct elf32_hppa_stub_hash_entry *hsh; |
| 2827 | asection *sym_sec; |
| 2828 | bfd_vma sym_value; |
| 2829 | bfd_vma destination; |
| 2830 | struct elf32_hppa_link_hash_entry *hh; |
| 2831 | char *stub_name; |
| 2832 | const asection *id_sec; |
| 2833 | |
| 2834 | r_type = ELF32_R_TYPE (irela->r_info); |
| 2835 | r_indx = ELF32_R_SYM (irela->r_info); |
| 2836 | |
| 2837 | if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED) |
| 2838 | { |
| 2839 | bfd_set_error (bfd_error_bad_value); |
| 2840 | error_ret_free_internal: |
| 2841 | if (elf_section_data (section)->relocs == NULL) |
| 2842 | free (internal_relocs); |
| 2843 | goto error_ret_free_local; |
| 2844 | } |
| 2845 | |
| 2846 | /* Only look for stubs on call instructions. */ |
| 2847 | if (r_type != (unsigned int) R_PARISC_PCREL12F |
| 2848 | && r_type != (unsigned int) R_PARISC_PCREL17F |
| 2849 | && r_type != (unsigned int) R_PARISC_PCREL22F) |
| 2850 | continue; |
| 2851 | |
| 2852 | /* Now determine the call target, its name, value, |
| 2853 | section. */ |
| 2854 | sym_sec = NULL; |
| 2855 | sym_value = 0; |
| 2856 | destination = -1; |
| 2857 | hh = NULL; |
| 2858 | if (r_indx < symtab_hdr->sh_info) |
| 2859 | { |
| 2860 | /* It's a local symbol. */ |
| 2861 | Elf_Internal_Sym *sym; |
| 2862 | Elf_Internal_Shdr *hdr; |
| 2863 | unsigned int shndx; |
| 2864 | |
| 2865 | sym = local_syms + r_indx; |
| 2866 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 2867 | sym_value = sym->st_value; |
| 2868 | shndx = sym->st_shndx; |
| 2869 | if (shndx < elf_numsections (input_bfd)) |
| 2870 | { |
| 2871 | hdr = elf_elfsections (input_bfd)[shndx]; |
| 2872 | sym_sec = hdr->bfd_section; |
| 2873 | destination = (sym_value + irela->r_addend |
| 2874 | + sym_sec->output_offset |
| 2875 | + sym_sec->output_section->vma); |
| 2876 | } |
| 2877 | } |
| 2878 | else |
| 2879 | { |
| 2880 | /* It's an external symbol. */ |
| 2881 | int e_indx; |
| 2882 | |
| 2883 | e_indx = r_indx - symtab_hdr->sh_info; |
| 2884 | hh = hppa_elf_hash_entry (elf_sym_hashes (input_bfd)[e_indx]); |
| 2885 | |
| 2886 | while (hh->eh.root.type == bfd_link_hash_indirect |
| 2887 | || hh->eh.root.type == bfd_link_hash_warning) |
| 2888 | hh = hppa_elf_hash_entry (hh->eh.root.u.i.link); |
| 2889 | |
| 2890 | if (hh->eh.root.type == bfd_link_hash_defined |
| 2891 | || hh->eh.root.type == bfd_link_hash_defweak) |
| 2892 | { |
| 2893 | sym_sec = hh->eh.root.u.def.section; |
| 2894 | sym_value = hh->eh.root.u.def.value; |
| 2895 | if (sym_sec->output_section != NULL) |
| 2896 | destination = (sym_value + irela->r_addend |
| 2897 | + sym_sec->output_offset |
| 2898 | + sym_sec->output_section->vma); |
| 2899 | } |
| 2900 | else if (hh->eh.root.type == bfd_link_hash_undefweak) |
| 2901 | { |
| 2902 | if (! bfd_link_pic (info)) |
| 2903 | continue; |
| 2904 | } |
| 2905 | else if (hh->eh.root.type == bfd_link_hash_undefined) |
| 2906 | { |
| 2907 | if (! (info->unresolved_syms_in_objects == RM_IGNORE |
| 2908 | && (ELF_ST_VISIBILITY (hh->eh.other) |
| 2909 | == STV_DEFAULT) |
| 2910 | && hh->eh.type != STT_PARISC_MILLI)) |
| 2911 | continue; |
| 2912 | } |
| 2913 | else |
| 2914 | { |
| 2915 | bfd_set_error (bfd_error_bad_value); |
| 2916 | goto error_ret_free_internal; |
| 2917 | } |
| 2918 | } |
| 2919 | |
| 2920 | /* Determine what (if any) linker stub is needed. */ |
| 2921 | stub_type = hppa_type_of_stub (section, irela, hh, |
| 2922 | destination, info); |
| 2923 | if (stub_type == hppa_stub_none) |
| 2924 | continue; |
| 2925 | |
| 2926 | /* Support for grouping stub sections. */ |
| 2927 | id_sec = htab->stub_group[section->id].link_sec; |
| 2928 | |
| 2929 | /* Get the name of this stub. */ |
| 2930 | stub_name = hppa_stub_name (id_sec, sym_sec, hh, irela); |
| 2931 | if (!stub_name) |
| 2932 | goto error_ret_free_internal; |
| 2933 | |
| 2934 | hsh = hppa_stub_hash_lookup (&htab->bstab, |
| 2935 | stub_name, |
| 2936 | FALSE, FALSE); |
| 2937 | if (hsh != NULL) |
| 2938 | { |
| 2939 | /* The proper stub has already been created. */ |
| 2940 | free (stub_name); |
| 2941 | continue; |
| 2942 | } |
| 2943 | |
| 2944 | hsh = hppa_add_stub (stub_name, section, htab); |
| 2945 | if (hsh == NULL) |
| 2946 | { |
| 2947 | free (stub_name); |
| 2948 | goto error_ret_free_internal; |
| 2949 | } |
| 2950 | |
| 2951 | hsh->target_value = sym_value; |
| 2952 | hsh->target_section = sym_sec; |
| 2953 | hsh->stub_type = stub_type; |
| 2954 | if (bfd_link_pic (info)) |
| 2955 | { |
| 2956 | if (stub_type == hppa_stub_import) |
| 2957 | hsh->stub_type = hppa_stub_import_shared; |
| 2958 | else if (stub_type == hppa_stub_long_branch) |
| 2959 | hsh->stub_type = hppa_stub_long_branch_shared; |
| 2960 | } |
| 2961 | hsh->hh = hh; |
| 2962 | stub_changed = TRUE; |
| 2963 | } |
| 2964 | |
| 2965 | /* We're done with the internal relocs, free them. */ |
| 2966 | if (elf_section_data (section)->relocs == NULL) |
| 2967 | free (internal_relocs); |
| 2968 | } |
| 2969 | } |
| 2970 | |
| 2971 | if (!stub_changed) |
| 2972 | break; |
| 2973 | |
| 2974 | /* OK, we've added some stubs. Find out the new size of the |
| 2975 | stub sections. */ |
| 2976 | for (stub_sec = htab->stub_bfd->sections; |
| 2977 | stub_sec != NULL; |
| 2978 | stub_sec = stub_sec->next) |
| 2979 | if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) |
| 2980 | stub_sec->size = 0; |
| 2981 | |
| 2982 | bfd_hash_traverse (&htab->bstab, hppa_size_one_stub, htab); |
| 2983 | |
| 2984 | /* Ask the linker to do its stuff. */ |
| 2985 | (*htab->layout_sections_again) (); |
| 2986 | stub_changed = FALSE; |
| 2987 | } |
| 2988 | |
| 2989 | free (htab->all_local_syms); |
| 2990 | return TRUE; |
| 2991 | |
| 2992 | error_ret_free_local: |
| 2993 | free (htab->all_local_syms); |
| 2994 | return FALSE; |
| 2995 | } |
| 2996 | |
| 2997 | /* For a final link, this function is called after we have sized the |
| 2998 | stubs to provide a value for __gp. */ |
| 2999 | |
| 3000 | bfd_boolean |
| 3001 | elf32_hppa_set_gp (bfd *abfd, struct bfd_link_info *info) |
| 3002 | { |
| 3003 | struct bfd_link_hash_entry *h; |
| 3004 | asection *sec = NULL; |
| 3005 | bfd_vma gp_val = 0; |
| 3006 | |
| 3007 | h = bfd_link_hash_lookup (info->hash, "$global$", FALSE, FALSE, FALSE); |
| 3008 | |
| 3009 | if (h != NULL |
| 3010 | && (h->type == bfd_link_hash_defined |
| 3011 | || h->type == bfd_link_hash_defweak)) |
| 3012 | { |
| 3013 | gp_val = h->u.def.value; |
| 3014 | sec = h->u.def.section; |
| 3015 | } |
| 3016 | else |
| 3017 | { |
| 3018 | asection *splt = bfd_get_section_by_name (abfd, ".plt"); |
| 3019 | asection *sgot = bfd_get_section_by_name (abfd, ".got"); |
| 3020 | |
| 3021 | /* Choose to point our LTP at, in this order, one of .plt, .got, |
| 3022 | or .data, if these sections exist. In the case of choosing |
| 3023 | .plt try to make the LTP ideal for addressing anywhere in the |
| 3024 | .plt or .got with a 14 bit signed offset. Typically, the end |
| 3025 | of the .plt is the start of the .got, so choose .plt + 0x2000 |
| 3026 | if either the .plt or .got is larger than 0x2000. If both |
| 3027 | the .plt and .got are smaller than 0x2000, choose the end of |
| 3028 | the .plt section. */ |
| 3029 | sec = strcmp (bfd_get_target (abfd), "elf32-hppa-netbsd") == 0 |
| 3030 | ? NULL : splt; |
| 3031 | if (sec != NULL) |
| 3032 | { |
| 3033 | gp_val = sec->size; |
| 3034 | if (gp_val > 0x2000 || (sgot && sgot->size > 0x2000)) |
| 3035 | { |
| 3036 | gp_val = 0x2000; |
| 3037 | } |
| 3038 | } |
| 3039 | else |
| 3040 | { |
| 3041 | sec = sgot; |
| 3042 | if (sec != NULL) |
| 3043 | { |
| 3044 | if (strcmp (bfd_get_target (abfd), "elf32-hppa-netbsd") != 0) |
| 3045 | { |
| 3046 | /* We know we don't have a .plt. If .got is large, |
| 3047 | offset our LTP. */ |
| 3048 | if (sec->size > 0x2000) |
| 3049 | gp_val = 0x2000; |
| 3050 | } |
| 3051 | } |
| 3052 | else |
| 3053 | { |
| 3054 | /* No .plt or .got. Who cares what the LTP is? */ |
| 3055 | sec = bfd_get_section_by_name (abfd, ".data"); |
| 3056 | } |
| 3057 | } |
| 3058 | |
| 3059 | if (h != NULL) |
| 3060 | { |
| 3061 | h->type = bfd_link_hash_defined; |
| 3062 | h->u.def.value = gp_val; |
| 3063 | if (sec != NULL) |
| 3064 | h->u.def.section = sec; |
| 3065 | else |
| 3066 | h->u.def.section = bfd_abs_section_ptr; |
| 3067 | } |
| 3068 | } |
| 3069 | |
| 3070 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour) |
| 3071 | { |
| 3072 | if (sec != NULL && sec->output_section != NULL) |
| 3073 | gp_val += sec->output_section->vma + sec->output_offset; |
| 3074 | |
| 3075 | elf_gp (abfd) = gp_val; |
| 3076 | } |
| 3077 | return TRUE; |
| 3078 | } |
| 3079 | |
| 3080 | /* Build all the stubs associated with the current output file. The |
| 3081 | stubs are kept in a hash table attached to the main linker hash |
| 3082 | table. We also set up the .plt entries for statically linked PIC |
| 3083 | functions here. This function is called via hppaelf_finish in the |
| 3084 | linker. */ |
| 3085 | |
| 3086 | bfd_boolean |
| 3087 | elf32_hppa_build_stubs (struct bfd_link_info *info) |
| 3088 | { |
| 3089 | asection *stub_sec; |
| 3090 | struct bfd_hash_table *table; |
| 3091 | struct elf32_hppa_link_hash_table *htab; |
| 3092 | |
| 3093 | htab = hppa_link_hash_table (info); |
| 3094 | if (htab == NULL) |
| 3095 | return FALSE; |
| 3096 | |
| 3097 | for (stub_sec = htab->stub_bfd->sections; |
| 3098 | stub_sec != NULL; |
| 3099 | stub_sec = stub_sec->next) |
| 3100 | if ((stub_sec->flags & SEC_LINKER_CREATED) == 0 |
| 3101 | && stub_sec->size != 0) |
| 3102 | { |
| 3103 | /* Allocate memory to hold the linker stubs. */ |
| 3104 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, stub_sec->size); |
| 3105 | if (stub_sec->contents == NULL) |
| 3106 | return FALSE; |
| 3107 | stub_sec->size = 0; |
| 3108 | } |
| 3109 | |
| 3110 | /* Build the stubs as directed by the stub hash table. */ |
| 3111 | table = &htab->bstab; |
| 3112 | bfd_hash_traverse (table, hppa_build_one_stub, info); |
| 3113 | |
| 3114 | return TRUE; |
| 3115 | } |
| 3116 | |
| 3117 | /* Return the base vma address which should be subtracted from the real |
| 3118 | address when resolving a dtpoff relocation. |
| 3119 | This is PT_TLS segment p_vaddr. */ |
| 3120 | |
| 3121 | static bfd_vma |
| 3122 | dtpoff_base (struct bfd_link_info *info) |
| 3123 | { |
| 3124 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 3125 | if (elf_hash_table (info)->tls_sec == NULL) |
| 3126 | return 0; |
| 3127 | return elf_hash_table (info)->tls_sec->vma; |
| 3128 | } |
| 3129 | |
| 3130 | /* Return the relocation value for R_PARISC_TLS_TPOFF*.. */ |
| 3131 | |
| 3132 | static bfd_vma |
| 3133 | tpoff (struct bfd_link_info *info, bfd_vma address) |
| 3134 | { |
| 3135 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 3136 | |
| 3137 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 3138 | if (htab->tls_sec == NULL) |
| 3139 | return 0; |
| 3140 | /* hppa TLS ABI is variant I and static TLS block start just after |
| 3141 | tcbhead structure which has 2 pointer fields. */ |
| 3142 | return (address - htab->tls_sec->vma |
| 3143 | + align_power ((bfd_vma) 8, htab->tls_sec->alignment_power)); |
| 3144 | } |
| 3145 | |
| 3146 | /* Perform a final link. */ |
| 3147 | |
| 3148 | static bfd_boolean |
| 3149 | elf32_hppa_final_link (bfd *abfd, struct bfd_link_info *info) |
| 3150 | { |
| 3151 | struct stat buf; |
| 3152 | |
| 3153 | /* Invoke the regular ELF linker to do all the work. */ |
| 3154 | if (!bfd_elf_final_link (abfd, info)) |
| 3155 | return FALSE; |
| 3156 | |
| 3157 | /* If we're producing a final executable, sort the contents of the |
| 3158 | unwind section. */ |
| 3159 | if (bfd_link_relocatable (info)) |
| 3160 | return TRUE; |
| 3161 | |
| 3162 | /* Do not attempt to sort non-regular files. This is here |
| 3163 | especially for configure scripts and kernel builds which run |
| 3164 | tests with "ld [...] -o /dev/null". */ |
| 3165 | if (stat (abfd->filename, &buf) != 0 |
| 3166 | || !S_ISREG(buf.st_mode)) |
| 3167 | return TRUE; |
| 3168 | |
| 3169 | return elf_hppa_sort_unwind (abfd); |
| 3170 | } |
| 3171 | |
| 3172 | /* Record the lowest address for the data and text segments. */ |
| 3173 | |
| 3174 | static void |
| 3175 | hppa_record_segment_addr (bfd *abfd, asection *section, void *data) |
| 3176 | { |
| 3177 | struct elf32_hppa_link_hash_table *htab; |
| 3178 | |
| 3179 | htab = (struct elf32_hppa_link_hash_table*) data; |
| 3180 | if (htab == NULL) |
| 3181 | return; |
| 3182 | |
| 3183 | if ((section->flags & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) |
| 3184 | { |
| 3185 | bfd_vma value; |
| 3186 | Elf_Internal_Phdr *p; |
| 3187 | |
| 3188 | p = _bfd_elf_find_segment_containing_section (abfd, section->output_section); |
| 3189 | BFD_ASSERT (p != NULL); |
| 3190 | value = p->p_vaddr; |
| 3191 | |
| 3192 | if ((section->flags & SEC_READONLY) != 0) |
| 3193 | { |
| 3194 | if (value < htab->text_segment_base) |
| 3195 | htab->text_segment_base = value; |
| 3196 | } |
| 3197 | else |
| 3198 | { |
| 3199 | if (value < htab->data_segment_base) |
| 3200 | htab->data_segment_base = value; |
| 3201 | } |
| 3202 | } |
| 3203 | } |
| 3204 | |
| 3205 | /* Perform a relocation as part of a final link. */ |
| 3206 | |
| 3207 | static bfd_reloc_status_type |
| 3208 | final_link_relocate (asection *input_section, |
| 3209 | bfd_byte *contents, |
| 3210 | const Elf_Internal_Rela *rela, |
| 3211 | bfd_vma value, |
| 3212 | struct elf32_hppa_link_hash_table *htab, |
| 3213 | asection *sym_sec, |
| 3214 | struct elf32_hppa_link_hash_entry *hh, |
| 3215 | struct bfd_link_info *info) |
| 3216 | { |
| 3217 | int insn; |
| 3218 | unsigned int r_type = ELF32_R_TYPE (rela->r_info); |
| 3219 | unsigned int orig_r_type = r_type; |
| 3220 | reloc_howto_type *howto = elf_hppa_howto_table + r_type; |
| 3221 | int r_format = howto->bitsize; |
| 3222 | enum hppa_reloc_field_selector_type_alt r_field; |
| 3223 | bfd *input_bfd = input_section->owner; |
| 3224 | bfd_vma offset = rela->r_offset; |
| 3225 | bfd_vma max_branch_offset = 0; |
| 3226 | bfd_byte *hit_data = contents + offset; |
| 3227 | bfd_signed_vma addend = rela->r_addend; |
| 3228 | bfd_vma location; |
| 3229 | struct elf32_hppa_stub_hash_entry *hsh = NULL; |
| 3230 | int val; |
| 3231 | |
| 3232 | if (r_type == R_PARISC_NONE) |
| 3233 | return bfd_reloc_ok; |
| 3234 | |
| 3235 | insn = bfd_get_32 (input_bfd, hit_data); |
| 3236 | |
| 3237 | /* Find out where we are and where we're going. */ |
| 3238 | location = (offset + |
| 3239 | input_section->output_offset + |
| 3240 | input_section->output_section->vma); |
| 3241 | |
| 3242 | /* If we are not building a shared library, convert DLTIND relocs to |
| 3243 | DPREL relocs. */ |
| 3244 | if (!bfd_link_pic (info)) |
| 3245 | { |
| 3246 | switch (r_type) |
| 3247 | { |
| 3248 | case R_PARISC_DLTIND21L: |
| 3249 | case R_PARISC_TLS_GD21L: |
| 3250 | case R_PARISC_TLS_LDM21L: |
| 3251 | case R_PARISC_TLS_IE21L: |
| 3252 | r_type = R_PARISC_DPREL21L; |
| 3253 | break; |
| 3254 | |
| 3255 | case R_PARISC_DLTIND14R: |
| 3256 | case R_PARISC_TLS_GD14R: |
| 3257 | case R_PARISC_TLS_LDM14R: |
| 3258 | case R_PARISC_TLS_IE14R: |
| 3259 | r_type = R_PARISC_DPREL14R; |
| 3260 | break; |
| 3261 | |
| 3262 | case R_PARISC_DLTIND14F: |
| 3263 | r_type = R_PARISC_DPREL14F; |
| 3264 | break; |
| 3265 | } |
| 3266 | } |
| 3267 | |
| 3268 | switch (r_type) |
| 3269 | { |
| 3270 | case R_PARISC_PCREL12F: |
| 3271 | case R_PARISC_PCREL17F: |
| 3272 | case R_PARISC_PCREL22F: |
| 3273 | /* If this call should go via the plt, find the import stub in |
| 3274 | the stub hash. */ |
| 3275 | if (sym_sec == NULL |
| 3276 | || sym_sec->output_section == NULL |
| 3277 | || (hh != NULL |
| 3278 | && hh->eh.plt.offset != (bfd_vma) -1 |
| 3279 | && hh->eh.dynindx != -1 |
| 3280 | && !hh->plabel |
| 3281 | && (bfd_link_pic (info) |
| 3282 | || !hh->eh.def_regular |
| 3283 | || hh->eh.root.type == bfd_link_hash_defweak))) |
| 3284 | { |
| 3285 | hsh = hppa_get_stub_entry (input_section, sym_sec, |
| 3286 | hh, rela, htab); |
| 3287 | if (hsh != NULL) |
| 3288 | { |
| 3289 | value = (hsh->stub_offset |
| 3290 | + hsh->stub_sec->output_offset |
| 3291 | + hsh->stub_sec->output_section->vma); |
| 3292 | addend = 0; |
| 3293 | } |
| 3294 | else if (sym_sec == NULL && hh != NULL |
| 3295 | && hh->eh.root.type == bfd_link_hash_undefweak) |
| 3296 | { |
| 3297 | /* It's OK if undefined weak. Calls to undefined weak |
| 3298 | symbols behave as if the "called" function |
| 3299 | immediately returns. We can thus call to a weak |
| 3300 | function without first checking whether the function |
| 3301 | is defined. */ |
| 3302 | value = location; |
| 3303 | addend = 8; |
| 3304 | } |
| 3305 | else |
| 3306 | return bfd_reloc_undefined; |
| 3307 | } |
| 3308 | /* Fall thru. */ |
| 3309 | |
| 3310 | case R_PARISC_PCREL21L: |
| 3311 | case R_PARISC_PCREL17C: |
| 3312 | case R_PARISC_PCREL17R: |
| 3313 | case R_PARISC_PCREL14R: |
| 3314 | case R_PARISC_PCREL14F: |
| 3315 | case R_PARISC_PCREL32: |
| 3316 | /* Make it a pc relative offset. */ |
| 3317 | value -= location; |
| 3318 | addend -= 8; |
| 3319 | break; |
| 3320 | |
| 3321 | case R_PARISC_DPREL21L: |
| 3322 | case R_PARISC_DPREL14R: |
| 3323 | case R_PARISC_DPREL14F: |
| 3324 | /* Convert instructions that use the linkage table pointer (r19) to |
| 3325 | instructions that use the global data pointer (dp). This is the |
| 3326 | most efficient way of using PIC code in an incomplete executable, |
| 3327 | but the user must follow the standard runtime conventions for |
| 3328 | accessing data for this to work. */ |
| 3329 | if (orig_r_type != r_type) |
| 3330 | { |
| 3331 | if (r_type == R_PARISC_DPREL21L) |
| 3332 | { |
| 3333 | /* GCC sometimes uses a register other than r19 for the |
| 3334 | operation, so we must convert any addil instruction |
| 3335 | that uses this relocation. */ |
| 3336 | if ((insn & 0xfc000000) == ((int) OP_ADDIL << 26)) |
| 3337 | insn = ADDIL_DP; |
| 3338 | else |
| 3339 | /* We must have a ldil instruction. It's too hard to find |
| 3340 | and convert the associated add instruction, so issue an |
| 3341 | error. */ |
| 3342 | _bfd_error_handler |
| 3343 | /* xgettext:c-format */ |
| 3344 | (_("%pB(%pA+%#" PRIx64 "): %s fixup for insn %#x " |
| 3345 | "is not supported in a non-shared link"), |
| 3346 | input_bfd, |
| 3347 | input_section, |
| 3348 | (uint64_t) offset, |
| 3349 | howto->name, |
| 3350 | insn); |
| 3351 | } |
| 3352 | else if (r_type == R_PARISC_DPREL14F) |
| 3353 | { |
| 3354 | /* This must be a format 1 load/store. Change the base |
| 3355 | register to dp. */ |
| 3356 | insn = (insn & 0xfc1ffff) | (27 << 21); |
| 3357 | } |
| 3358 | } |
| 3359 | |
| 3360 | /* For all the DP relative relocations, we need to examine the symbol's |
| 3361 | section. If it has no section or if it's a code section, then |
| 3362 | "data pointer relative" makes no sense. In that case we don't |
| 3363 | adjust the "value", and for 21 bit addil instructions, we change the |
| 3364 | source addend register from %dp to %r0. This situation commonly |
| 3365 | arises for undefined weak symbols and when a variable's "constness" |
| 3366 | is declared differently from the way the variable is defined. For |
| 3367 | instance: "extern int foo" with foo defined as "const int foo". */ |
| 3368 | if (sym_sec == NULL || (sym_sec->flags & SEC_CODE) != 0) |
| 3369 | { |
| 3370 | if ((insn & ((0x3f << 26) | (0x1f << 21))) |
| 3371 | == (((int) OP_ADDIL << 26) | (27 << 21))) |
| 3372 | { |
| 3373 | insn &= ~ (0x1f << 21); |
| 3374 | } |
| 3375 | /* Now try to make things easy for the dynamic linker. */ |
| 3376 | |
| 3377 | break; |
| 3378 | } |
| 3379 | /* Fall thru. */ |
| 3380 | |
| 3381 | case R_PARISC_DLTIND21L: |
| 3382 | case R_PARISC_DLTIND14R: |
| 3383 | case R_PARISC_DLTIND14F: |
| 3384 | case R_PARISC_TLS_GD21L: |
| 3385 | case R_PARISC_TLS_LDM21L: |
| 3386 | case R_PARISC_TLS_IE21L: |
| 3387 | case R_PARISC_TLS_GD14R: |
| 3388 | case R_PARISC_TLS_LDM14R: |
| 3389 | case R_PARISC_TLS_IE14R: |
| 3390 | value -= elf_gp (input_section->output_section->owner); |
| 3391 | break; |
| 3392 | |
| 3393 | case R_PARISC_SEGREL32: |
| 3394 | if ((sym_sec->flags & SEC_CODE) != 0) |
| 3395 | value -= htab->text_segment_base; |
| 3396 | else |
| 3397 | value -= htab->data_segment_base; |
| 3398 | break; |
| 3399 | |
| 3400 | default: |
| 3401 | break; |
| 3402 | } |
| 3403 | |
| 3404 | switch (r_type) |
| 3405 | { |
| 3406 | case R_PARISC_DIR32: |
| 3407 | case R_PARISC_DIR14F: |
| 3408 | case R_PARISC_DIR17F: |
| 3409 | case R_PARISC_PCREL17C: |
| 3410 | case R_PARISC_PCREL14F: |
| 3411 | case R_PARISC_PCREL32: |
| 3412 | case R_PARISC_DPREL14F: |
| 3413 | case R_PARISC_PLABEL32: |
| 3414 | case R_PARISC_DLTIND14F: |
| 3415 | case R_PARISC_SEGBASE: |
| 3416 | case R_PARISC_SEGREL32: |
| 3417 | case R_PARISC_TLS_DTPMOD32: |
| 3418 | case R_PARISC_TLS_DTPOFF32: |
| 3419 | case R_PARISC_TLS_TPREL32: |
| 3420 | r_field = e_fsel; |
| 3421 | break; |
| 3422 | |
| 3423 | case R_PARISC_DLTIND21L: |
| 3424 | case R_PARISC_PCREL21L: |
| 3425 | case R_PARISC_PLABEL21L: |
| 3426 | r_field = e_lsel; |
| 3427 | break; |
| 3428 | |
| 3429 | case R_PARISC_DIR21L: |
| 3430 | case R_PARISC_DPREL21L: |
| 3431 | case R_PARISC_TLS_GD21L: |
| 3432 | case R_PARISC_TLS_LDM21L: |
| 3433 | case R_PARISC_TLS_LDO21L: |
| 3434 | case R_PARISC_TLS_IE21L: |
| 3435 | case R_PARISC_TLS_LE21L: |
| 3436 | r_field = e_lrsel; |
| 3437 | break; |
| 3438 | |
| 3439 | case R_PARISC_PCREL17R: |
| 3440 | case R_PARISC_PCREL14R: |
| 3441 | case R_PARISC_PLABEL14R: |
| 3442 | case R_PARISC_DLTIND14R: |
| 3443 | r_field = e_rsel; |
| 3444 | break; |
| 3445 | |
| 3446 | case R_PARISC_DIR17R: |
| 3447 | case R_PARISC_DIR14R: |
| 3448 | case R_PARISC_DPREL14R: |
| 3449 | case R_PARISC_TLS_GD14R: |
| 3450 | case R_PARISC_TLS_LDM14R: |
| 3451 | case R_PARISC_TLS_LDO14R: |
| 3452 | case R_PARISC_TLS_IE14R: |
| 3453 | case R_PARISC_TLS_LE14R: |
| 3454 | r_field = e_rrsel; |
| 3455 | break; |
| 3456 | |
| 3457 | case R_PARISC_PCREL12F: |
| 3458 | case R_PARISC_PCREL17F: |
| 3459 | case R_PARISC_PCREL22F: |
| 3460 | r_field = e_fsel; |
| 3461 | |
| 3462 | if (r_type == (unsigned int) R_PARISC_PCREL17F) |
| 3463 | { |
| 3464 | max_branch_offset = (1 << (17-1)) << 2; |
| 3465 | } |
| 3466 | else if (r_type == (unsigned int) R_PARISC_PCREL12F) |
| 3467 | { |
| 3468 | max_branch_offset = (1 << (12-1)) << 2; |
| 3469 | } |
| 3470 | else |
| 3471 | { |
| 3472 | max_branch_offset = (1 << (22-1)) << 2; |
| 3473 | } |
| 3474 | |
| 3475 | /* sym_sec is NULL on undefined weak syms or when shared on |
| 3476 | undefined syms. We've already checked for a stub for the |
| 3477 | shared undefined case. */ |
| 3478 | if (sym_sec == NULL) |
| 3479 | break; |
| 3480 | |
| 3481 | /* If the branch is out of reach, then redirect the |
| 3482 | call to the local stub for this function. */ |
| 3483 | if (value + addend + max_branch_offset >= 2*max_branch_offset) |
| 3484 | { |
| 3485 | hsh = hppa_get_stub_entry (input_section, sym_sec, |
| 3486 | hh, rela, htab); |
| 3487 | if (hsh == NULL) |
| 3488 | return bfd_reloc_undefined; |
| 3489 | |
| 3490 | /* Munge up the value and addend so that we call the stub |
| 3491 | rather than the procedure directly. */ |
| 3492 | value = (hsh->stub_offset |
| 3493 | + hsh->stub_sec->output_offset |
| 3494 | + hsh->stub_sec->output_section->vma |
| 3495 | - location); |
| 3496 | addend = -8; |
| 3497 | } |
| 3498 | break; |
| 3499 | |
| 3500 | /* Something we don't know how to handle. */ |
| 3501 | default: |
| 3502 | return bfd_reloc_notsupported; |
| 3503 | } |
| 3504 | |
| 3505 | /* Make sure we can reach the stub. */ |
| 3506 | if (max_branch_offset != 0 |
| 3507 | && value + addend + max_branch_offset >= 2*max_branch_offset) |
| 3508 | { |
| 3509 | _bfd_error_handler |
| 3510 | /* xgettext:c-format */ |
| 3511 | (_("%pB(%pA+%#" PRIx64 "): cannot reach %s, " |
| 3512 | "recompile with -ffunction-sections"), |
| 3513 | input_bfd, |
| 3514 | input_section, |
| 3515 | (uint64_t) offset, |
| 3516 | hsh->bh_root.string); |
| 3517 | bfd_set_error (bfd_error_bad_value); |
| 3518 | return bfd_reloc_notsupported; |
| 3519 | } |
| 3520 | |
| 3521 | val = hppa_field_adjust (value, addend, r_field); |
| 3522 | |
| 3523 | switch (r_type) |
| 3524 | { |
| 3525 | case R_PARISC_PCREL12F: |
| 3526 | case R_PARISC_PCREL17C: |
| 3527 | case R_PARISC_PCREL17F: |
| 3528 | case R_PARISC_PCREL17R: |
| 3529 | case R_PARISC_PCREL22F: |
| 3530 | case R_PARISC_DIR17F: |
| 3531 | case R_PARISC_DIR17R: |
| 3532 | /* This is a branch. Divide the offset by four. |
| 3533 | Note that we need to decide whether it's a branch or |
| 3534 | otherwise by inspecting the reloc. Inspecting insn won't |
| 3535 | work as insn might be from a .word directive. */ |
| 3536 | val >>= 2; |
| 3537 | break; |
| 3538 | |
| 3539 | default: |
| 3540 | break; |
| 3541 | } |
| 3542 | |
| 3543 | insn = hppa_rebuild_insn (insn, val, r_format); |
| 3544 | |
| 3545 | /* Update the instruction word. */ |
| 3546 | bfd_put_32 (input_bfd, (bfd_vma) insn, hit_data); |
| 3547 | return bfd_reloc_ok; |
| 3548 | } |
| 3549 | |
| 3550 | /* Relocate an HPPA ELF section. */ |
| 3551 | |
| 3552 | static bfd_boolean |
| 3553 | elf32_hppa_relocate_section (bfd *output_bfd, |
| 3554 | struct bfd_link_info *info, |
| 3555 | bfd *input_bfd, |
| 3556 | asection *input_section, |
| 3557 | bfd_byte *contents, |
| 3558 | Elf_Internal_Rela *relocs, |
| 3559 | Elf_Internal_Sym *local_syms, |
| 3560 | asection **local_sections) |
| 3561 | { |
| 3562 | bfd_vma *local_got_offsets; |
| 3563 | struct elf32_hppa_link_hash_table *htab; |
| 3564 | Elf_Internal_Shdr *symtab_hdr; |
| 3565 | Elf_Internal_Rela *rela; |
| 3566 | Elf_Internal_Rela *relend; |
| 3567 | |
| 3568 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 3569 | |
| 3570 | htab = hppa_link_hash_table (info); |
| 3571 | if (htab == NULL) |
| 3572 | return FALSE; |
| 3573 | |
| 3574 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 3575 | |
| 3576 | rela = relocs; |
| 3577 | relend = relocs + input_section->reloc_count; |
| 3578 | for (; rela < relend; rela++) |
| 3579 | { |
| 3580 | unsigned int r_type; |
| 3581 | reloc_howto_type *howto; |
| 3582 | unsigned int r_symndx; |
| 3583 | struct elf32_hppa_link_hash_entry *hh; |
| 3584 | Elf_Internal_Sym *sym; |
| 3585 | asection *sym_sec; |
| 3586 | bfd_vma relocation; |
| 3587 | bfd_reloc_status_type rstatus; |
| 3588 | const char *sym_name; |
| 3589 | bfd_boolean plabel; |
| 3590 | bfd_boolean warned_undef; |
| 3591 | |
| 3592 | r_type = ELF32_R_TYPE (rela->r_info); |
| 3593 | if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED) |
| 3594 | { |
| 3595 | bfd_set_error (bfd_error_bad_value); |
| 3596 | return FALSE; |
| 3597 | } |
| 3598 | if (r_type == (unsigned int) R_PARISC_GNU_VTENTRY |
| 3599 | || r_type == (unsigned int) R_PARISC_GNU_VTINHERIT) |
| 3600 | continue; |
| 3601 | |
| 3602 | r_symndx = ELF32_R_SYM (rela->r_info); |
| 3603 | hh = NULL; |
| 3604 | sym = NULL; |
| 3605 | sym_sec = NULL; |
| 3606 | warned_undef = FALSE; |
| 3607 | if (r_symndx < symtab_hdr->sh_info) |
| 3608 | { |
| 3609 | /* This is a local symbol, h defaults to NULL. */ |
| 3610 | sym = local_syms + r_symndx; |
| 3611 | sym_sec = local_sections[r_symndx]; |
| 3612 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sym_sec, rela); |
| 3613 | } |
| 3614 | else |
| 3615 | { |
| 3616 | struct elf_link_hash_entry *eh; |
| 3617 | bfd_boolean unresolved_reloc, ignored; |
| 3618 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); |
| 3619 | |
| 3620 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rela, |
| 3621 | r_symndx, symtab_hdr, sym_hashes, |
| 3622 | eh, sym_sec, relocation, |
| 3623 | unresolved_reloc, warned_undef, |
| 3624 | ignored); |
| 3625 | |
| 3626 | if (!bfd_link_relocatable (info) |
| 3627 | && relocation == 0 |
| 3628 | && eh->root.type != bfd_link_hash_defined |
| 3629 | && eh->root.type != bfd_link_hash_defweak |
| 3630 | && eh->root.type != bfd_link_hash_undefweak) |
| 3631 | { |
| 3632 | if (info->unresolved_syms_in_objects == RM_IGNORE |
| 3633 | && ELF_ST_VISIBILITY (eh->other) == STV_DEFAULT |
| 3634 | && eh->type == STT_PARISC_MILLI) |
| 3635 | { |
| 3636 | (*info->callbacks->undefined_symbol) |
| 3637 | (info, eh_name (eh), input_bfd, |
| 3638 | input_section, rela->r_offset, FALSE); |
| 3639 | warned_undef = TRUE; |
| 3640 | } |
| 3641 | } |
| 3642 | hh = hppa_elf_hash_entry (eh); |
| 3643 | } |
| 3644 | |
| 3645 | if (sym_sec != NULL && discarded_section (sym_sec)) |
| 3646 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 3647 | rela, 1, relend, |
| 3648 | elf_hppa_howto_table + r_type, 0, |
| 3649 | contents); |
| 3650 | |
| 3651 | if (bfd_link_relocatable (info)) |
| 3652 | continue; |
| 3653 | |
| 3654 | /* Do any required modifications to the relocation value, and |
| 3655 | determine what types of dynamic info we need to output, if |
| 3656 | any. */ |
| 3657 | plabel = 0; |
| 3658 | switch (r_type) |
| 3659 | { |
| 3660 | case R_PARISC_DLTIND14F: |
| 3661 | case R_PARISC_DLTIND14R: |
| 3662 | case R_PARISC_DLTIND21L: |
| 3663 | { |
| 3664 | bfd_vma off; |
| 3665 | bfd_boolean do_got = FALSE; |
| 3666 | bfd_boolean reloc = bfd_link_pic (info); |
| 3667 | |
| 3668 | /* Relocation is to the entry for this symbol in the |
| 3669 | global offset table. */ |
| 3670 | if (hh != NULL) |
| 3671 | { |
| 3672 | bfd_boolean dyn; |
| 3673 | |
| 3674 | off = hh->eh.got.offset; |
| 3675 | dyn = htab->etab.dynamic_sections_created; |
| 3676 | reloc = (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, &hh->eh) |
| 3677 | && (reloc |
| 3678 | || (hh->eh.dynindx != -1 |
| 3679 | && !SYMBOL_REFERENCES_LOCAL (info, &hh->eh)))); |
| 3680 | if (!reloc |
| 3681 | || !WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
| 3682 | bfd_link_pic (info), |
| 3683 | &hh->eh)) |
| 3684 | { |
| 3685 | /* If we aren't going to call finish_dynamic_symbol, |
| 3686 | then we need to handle initialisation of the .got |
| 3687 | entry and create needed relocs here. Since the |
| 3688 | offset must always be a multiple of 4, we use the |
| 3689 | least significant bit to record whether we have |
| 3690 | initialised it already. */ |
| 3691 | if ((off & 1) != 0) |
| 3692 | off &= ~1; |
| 3693 | else |
| 3694 | { |
| 3695 | hh->eh.got.offset |= 1; |
| 3696 | do_got = TRUE; |
| 3697 | } |
| 3698 | } |
| 3699 | } |
| 3700 | else |
| 3701 | { |
| 3702 | /* Local symbol case. */ |
| 3703 | if (local_got_offsets == NULL) |
| 3704 | abort (); |
| 3705 | |
| 3706 | off = local_got_offsets[r_symndx]; |
| 3707 | |
| 3708 | /* The offset must always be a multiple of 4. We use |
| 3709 | the least significant bit to record whether we have |
| 3710 | already generated the necessary reloc. */ |
| 3711 | if ((off & 1) != 0) |
| 3712 | off &= ~1; |
| 3713 | else |
| 3714 | { |
| 3715 | local_got_offsets[r_symndx] |= 1; |
| 3716 | do_got = TRUE; |
| 3717 | } |
| 3718 | } |
| 3719 | |
| 3720 | if (do_got) |
| 3721 | { |
| 3722 | if (reloc) |
| 3723 | { |
| 3724 | /* Output a dynamic relocation for this GOT entry. |
| 3725 | In this case it is relative to the base of the |
| 3726 | object because the symbol index is zero. */ |
| 3727 | Elf_Internal_Rela outrel; |
| 3728 | bfd_byte *loc; |
| 3729 | asection *sec = htab->etab.srelgot; |
| 3730 | |
| 3731 | outrel.r_offset = (off |
| 3732 | + htab->etab.sgot->output_offset |
| 3733 | + htab->etab.sgot->output_section->vma); |
| 3734 | outrel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32); |
| 3735 | outrel.r_addend = relocation; |
| 3736 | loc = sec->contents; |
| 3737 | loc += sec->reloc_count++ * sizeof (Elf32_External_Rela); |
| 3738 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 3739 | } |
| 3740 | else |
| 3741 | bfd_put_32 (output_bfd, relocation, |
| 3742 | htab->etab.sgot->contents + off); |
| 3743 | } |
| 3744 | |
| 3745 | if (off >= (bfd_vma) -2) |
| 3746 | abort (); |
| 3747 | |
| 3748 | /* Add the base of the GOT to the relocation value. */ |
| 3749 | relocation = (off |
| 3750 | + htab->etab.sgot->output_offset |
| 3751 | + htab->etab.sgot->output_section->vma); |
| 3752 | } |
| 3753 | break; |
| 3754 | |
| 3755 | case R_PARISC_SEGREL32: |
| 3756 | /* If this is the first SEGREL relocation, then initialize |
| 3757 | the segment base values. */ |
| 3758 | if (htab->text_segment_base == (bfd_vma) -1) |
| 3759 | bfd_map_over_sections (output_bfd, hppa_record_segment_addr, htab); |
| 3760 | break; |
| 3761 | |
| 3762 | case R_PARISC_PLABEL14R: |
| 3763 | case R_PARISC_PLABEL21L: |
| 3764 | case R_PARISC_PLABEL32: |
| 3765 | if (htab->etab.dynamic_sections_created) |
| 3766 | { |
| 3767 | bfd_vma off; |
| 3768 | bfd_boolean do_plt = 0; |
| 3769 | /* If we have a global symbol with a PLT slot, then |
| 3770 | redirect this relocation to it. */ |
| 3771 | if (hh != NULL) |
| 3772 | { |
| 3773 | off = hh->eh.plt.offset; |
| 3774 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, |
| 3775 | bfd_link_pic (info), |
| 3776 | &hh->eh)) |
| 3777 | { |
| 3778 | /* In a non-shared link, adjust_dynamic_symbol |
| 3779 | isn't called for symbols forced local. We |
| 3780 | need to write out the plt entry here. */ |
| 3781 | if ((off & 1) != 0) |
| 3782 | off &= ~1; |
| 3783 | else |
| 3784 | { |
| 3785 | hh->eh.plt.offset |= 1; |
| 3786 | do_plt = 1; |
| 3787 | } |
| 3788 | } |
| 3789 | } |
| 3790 | else |
| 3791 | { |
| 3792 | bfd_vma *local_plt_offsets; |
| 3793 | |
| 3794 | if (local_got_offsets == NULL) |
| 3795 | abort (); |
| 3796 | |
| 3797 | local_plt_offsets = local_got_offsets + symtab_hdr->sh_info; |
| 3798 | off = local_plt_offsets[r_symndx]; |
| 3799 | |
| 3800 | /* As for the local .got entry case, we use the last |
| 3801 | bit to record whether we've already initialised |
| 3802 | this local .plt entry. */ |
| 3803 | if ((off & 1) != 0) |
| 3804 | off &= ~1; |
| 3805 | else |
| 3806 | { |
| 3807 | local_plt_offsets[r_symndx] |= 1; |
| 3808 | do_plt = 1; |
| 3809 | } |
| 3810 | } |
| 3811 | |
| 3812 | if (do_plt) |
| 3813 | { |
| 3814 | if (bfd_link_pic (info)) |
| 3815 | { |
| 3816 | /* Output a dynamic IPLT relocation for this |
| 3817 | PLT entry. */ |
| 3818 | Elf_Internal_Rela outrel; |
| 3819 | bfd_byte *loc; |
| 3820 | asection *s = htab->etab.srelplt; |
| 3821 | |
| 3822 | outrel.r_offset = (off |
| 3823 | + htab->etab.splt->output_offset |
| 3824 | + htab->etab.splt->output_section->vma); |
| 3825 | outrel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT); |
| 3826 | outrel.r_addend = relocation; |
| 3827 | loc = s->contents; |
| 3828 | loc += s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 3829 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 3830 | } |
| 3831 | else |
| 3832 | { |
| 3833 | bfd_put_32 (output_bfd, |
| 3834 | relocation, |
| 3835 | htab->etab.splt->contents + off); |
| 3836 | bfd_put_32 (output_bfd, |
| 3837 | elf_gp (htab->etab.splt->output_section->owner), |
| 3838 | htab->etab.splt->contents + off + 4); |
| 3839 | } |
| 3840 | } |
| 3841 | |
| 3842 | if (off >= (bfd_vma) -2) |
| 3843 | abort (); |
| 3844 | |
| 3845 | /* PLABELs contain function pointers. Relocation is to |
| 3846 | the entry for the function in the .plt. The magic +2 |
| 3847 | offset signals to $$dyncall that the function pointer |
| 3848 | is in the .plt and thus has a gp pointer too. |
| 3849 | Exception: Undefined PLABELs should have a value of |
| 3850 | zero. */ |
| 3851 | if (hh == NULL |
| 3852 | || (hh->eh.root.type != bfd_link_hash_undefweak |
| 3853 | && hh->eh.root.type != bfd_link_hash_undefined)) |
| 3854 | { |
| 3855 | relocation = (off |
| 3856 | + htab->etab.splt->output_offset |
| 3857 | + htab->etab.splt->output_section->vma |
| 3858 | + 2); |
| 3859 | } |
| 3860 | plabel = 1; |
| 3861 | } |
| 3862 | /* Fall through. */ |
| 3863 | |
| 3864 | case R_PARISC_DIR17F: |
| 3865 | case R_PARISC_DIR17R: |
| 3866 | case R_PARISC_DIR14F: |
| 3867 | case R_PARISC_DIR14R: |
| 3868 | case R_PARISC_DIR21L: |
| 3869 | case R_PARISC_DPREL14F: |
| 3870 | case R_PARISC_DPREL14R: |
| 3871 | case R_PARISC_DPREL21L: |
| 3872 | case R_PARISC_DIR32: |
| 3873 | if ((input_section->flags & SEC_ALLOC) == 0) |
| 3874 | break; |
| 3875 | |
| 3876 | if (bfd_link_pic (info) |
| 3877 | ? ((hh == NULL |
| 3878 | || hh->dyn_relocs != NULL) |
| 3879 | && ((hh != NULL && pc_dynrelocs (hh)) |
| 3880 | || IS_ABSOLUTE_RELOC (r_type))) |
| 3881 | : (hh != NULL |
| 3882 | && hh->dyn_relocs != NULL)) |
| 3883 | { |
| 3884 | Elf_Internal_Rela outrel; |
| 3885 | bfd_boolean skip; |
| 3886 | asection *sreloc; |
| 3887 | bfd_byte *loc; |
| 3888 | |
| 3889 | /* When generating a shared object, these relocations |
| 3890 | are copied into the output file to be resolved at run |
| 3891 | time. */ |
| 3892 | |
| 3893 | outrel.r_addend = rela->r_addend; |
| 3894 | outrel.r_offset = |
| 3895 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 3896 | rela->r_offset); |
| 3897 | skip = (outrel.r_offset == (bfd_vma) -1 |
| 3898 | || outrel.r_offset == (bfd_vma) -2); |
| 3899 | outrel.r_offset += (input_section->output_offset |
| 3900 | + input_section->output_section->vma); |
| 3901 | |
| 3902 | if (skip) |
| 3903 | { |
| 3904 | memset (&outrel, 0, sizeof (outrel)); |
| 3905 | } |
| 3906 | else if (hh != NULL |
| 3907 | && hh->eh.dynindx != -1 |
| 3908 | && (plabel |
| 3909 | || !IS_ABSOLUTE_RELOC (r_type) |
| 3910 | || !bfd_link_pic (info) |
| 3911 | || !SYMBOLIC_BIND (info, &hh->eh) |
| 3912 | || !hh->eh.def_regular)) |
| 3913 | { |
| 3914 | outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type); |
| 3915 | } |
| 3916 | else /* It's a local symbol, or one marked to become local. */ |
| 3917 | { |
| 3918 | int indx = 0; |
| 3919 | |
| 3920 | /* Add the absolute offset of the symbol. */ |
| 3921 | outrel.r_addend += relocation; |
| 3922 | |
| 3923 | /* Global plabels need to be processed by the |
| 3924 | dynamic linker so that functions have at most one |
| 3925 | fptr. For this reason, we need to differentiate |
| 3926 | between global and local plabels, which we do by |
| 3927 | providing the function symbol for a global plabel |
| 3928 | reloc, and no symbol for local plabels. */ |
| 3929 | if (! plabel |
| 3930 | && sym_sec != NULL |
| 3931 | && sym_sec->output_section != NULL |
| 3932 | && ! bfd_is_abs_section (sym_sec)) |
| 3933 | { |
| 3934 | asection *osec; |
| 3935 | |
| 3936 | osec = sym_sec->output_section; |
| 3937 | indx = elf_section_data (osec)->dynindx; |
| 3938 | if (indx == 0) |
| 3939 | { |
| 3940 | osec = htab->etab.text_index_section; |
| 3941 | indx = elf_section_data (osec)->dynindx; |
| 3942 | } |
| 3943 | BFD_ASSERT (indx != 0); |
| 3944 | |
| 3945 | /* We are turning this relocation into one |
| 3946 | against a section symbol, so subtract out the |
| 3947 | output section's address but not the offset |
| 3948 | of the input section in the output section. */ |
| 3949 | outrel.r_addend -= osec->vma; |
| 3950 | } |
| 3951 | |
| 3952 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
| 3953 | } |
| 3954 | sreloc = elf_section_data (input_section)->sreloc; |
| 3955 | if (sreloc == NULL) |
| 3956 | abort (); |
| 3957 | |
| 3958 | loc = sreloc->contents; |
| 3959 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); |
| 3960 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 3961 | } |
| 3962 | break; |
| 3963 | |
| 3964 | case R_PARISC_TLS_LDM21L: |
| 3965 | case R_PARISC_TLS_LDM14R: |
| 3966 | { |
| 3967 | bfd_vma off; |
| 3968 | |
| 3969 | off = htab->tls_ldm_got.offset; |
| 3970 | if (off & 1) |
| 3971 | off &= ~1; |
| 3972 | else |
| 3973 | { |
| 3974 | Elf_Internal_Rela outrel; |
| 3975 | bfd_byte *loc; |
| 3976 | |
| 3977 | outrel.r_offset = (off |
| 3978 | + htab->etab.sgot->output_section->vma |
| 3979 | + htab->etab.sgot->output_offset); |
| 3980 | outrel.r_addend = 0; |
| 3981 | outrel.r_info = ELF32_R_INFO (0, R_PARISC_TLS_DTPMOD32); |
| 3982 | loc = htab->etab.srelgot->contents; |
| 3983 | loc += htab->etab.srelgot->reloc_count++ * sizeof (Elf32_External_Rela); |
| 3984 | |
| 3985 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 3986 | htab->tls_ldm_got.offset |= 1; |
| 3987 | } |
| 3988 | |
| 3989 | /* Add the base of the GOT to the relocation value. */ |
| 3990 | relocation = (off |
| 3991 | + htab->etab.sgot->output_offset |
| 3992 | + htab->etab.sgot->output_section->vma); |
| 3993 | |
| 3994 | break; |
| 3995 | } |
| 3996 | |
| 3997 | case R_PARISC_TLS_LDO21L: |
| 3998 | case R_PARISC_TLS_LDO14R: |
| 3999 | relocation -= dtpoff_base (info); |
| 4000 | break; |
| 4001 | |
| 4002 | case R_PARISC_TLS_GD21L: |
| 4003 | case R_PARISC_TLS_GD14R: |
| 4004 | case R_PARISC_TLS_IE21L: |
| 4005 | case R_PARISC_TLS_IE14R: |
| 4006 | { |
| 4007 | bfd_vma off; |
| 4008 | int indx; |
| 4009 | char tls_type; |
| 4010 | |
| 4011 | indx = 0; |
| 4012 | if (hh != NULL) |
| 4013 | { |
| 4014 | if (!htab->etab.dynamic_sections_created |
| 4015 | || hh->eh.dynindx == -1 |
| 4016 | || SYMBOL_REFERENCES_LOCAL (info, &hh->eh) |
| 4017 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &hh->eh)) |
| 4018 | /* This is actually a static link, or it is a |
| 4019 | -Bsymbolic link and the symbol is defined |
| 4020 | locally, or the symbol was forced to be local |
| 4021 | because of a version file. */ |
| 4022 | ; |
| 4023 | else |
| 4024 | indx = hh->eh.dynindx; |
| 4025 | off = hh->eh.got.offset; |
| 4026 | tls_type = hh->tls_type; |
| 4027 | } |
| 4028 | else |
| 4029 | { |
| 4030 | off = local_got_offsets[r_symndx]; |
| 4031 | tls_type = hppa_elf_local_got_tls_type (input_bfd)[r_symndx]; |
| 4032 | } |
| 4033 | |
| 4034 | if (tls_type == GOT_UNKNOWN) |
| 4035 | abort (); |
| 4036 | |
| 4037 | if ((off & 1) != 0) |
| 4038 | off &= ~1; |
| 4039 | else |
| 4040 | { |
| 4041 | bfd_boolean need_relocs = FALSE; |
| 4042 | Elf_Internal_Rela outrel; |
| 4043 | bfd_byte *loc = NULL; |
| 4044 | int cur_off = off; |
| 4045 | |
| 4046 | /* The GOT entries have not been initialized yet. Do it |
| 4047 | now, and emit any relocations. If both an IE GOT and a |
| 4048 | GD GOT are necessary, we emit the GD first. */ |
| 4049 | |
| 4050 | if (indx != 0 |
| 4051 | || (bfd_link_dll (info) |
| 4052 | && (hh == NULL |
| 4053 | || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &hh->eh)))) |
| 4054 | { |
| 4055 | need_relocs = TRUE; |
| 4056 | loc = htab->etab.srelgot->contents; |
| 4057 | loc += (htab->etab.srelgot->reloc_count |
| 4058 | * sizeof (Elf32_External_Rela)); |
| 4059 | } |
| 4060 | |
| 4061 | if (tls_type & GOT_TLS_GD) |
| 4062 | { |
| 4063 | if (need_relocs) |
| 4064 | { |
| 4065 | outrel.r_offset |
| 4066 | = (cur_off |
| 4067 | + htab->etab.sgot->output_section->vma |
| 4068 | + htab->etab.sgot->output_offset); |
| 4069 | outrel.r_info |
| 4070 | = ELF32_R_INFO (indx, R_PARISC_TLS_DTPMOD32); |
| 4071 | outrel.r_addend = 0; |
| 4072 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 4073 | htab->etab.srelgot->reloc_count++; |
| 4074 | loc += sizeof (Elf32_External_Rela); |
| 4075 | bfd_put_32 (output_bfd, 0, |
| 4076 | htab->etab.sgot->contents + cur_off); |
| 4077 | } |
| 4078 | else |
| 4079 | /* If we are not emitting relocations for a |
| 4080 | general dynamic reference, then we must be in a |
| 4081 | static link or an executable link with the |
| 4082 | symbol binding locally. Mark it as belonging |
| 4083 | to module 1, the executable. */ |
| 4084 | bfd_put_32 (output_bfd, 1, |
| 4085 | htab->etab.sgot->contents + cur_off); |
| 4086 | |
| 4087 | if (indx != 0) |
| 4088 | { |
| 4089 | outrel.r_info |
| 4090 | = ELF32_R_INFO (indx, R_PARISC_TLS_DTPOFF32); |
| 4091 | outrel.r_offset += 4; |
| 4092 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 4093 | htab->etab.srelgot->reloc_count++; |
| 4094 | loc += sizeof (Elf32_External_Rela); |
| 4095 | bfd_put_32 (output_bfd, 0, |
| 4096 | htab->etab.sgot->contents + cur_off + 4); |
| 4097 | } |
| 4098 | else |
| 4099 | bfd_put_32 (output_bfd, relocation - dtpoff_base (info), |
| 4100 | htab->etab.sgot->contents + cur_off + 4); |
| 4101 | cur_off += 8; |
| 4102 | } |
| 4103 | |
| 4104 | if (tls_type & GOT_TLS_IE) |
| 4105 | { |
| 4106 | if (need_relocs |
| 4107 | && !(bfd_link_executable (info) |
| 4108 | && SYMBOL_REFERENCES_LOCAL (info, &hh->eh))) |
| 4109 | { |
| 4110 | outrel.r_offset |
| 4111 | = (cur_off |
| 4112 | + htab->etab.sgot->output_section->vma |
| 4113 | + htab->etab.sgot->output_offset); |
| 4114 | outrel.r_info = ELF32_R_INFO (indx, |
| 4115 | R_PARISC_TLS_TPREL32); |
| 4116 | if (indx == 0) |
| 4117 | outrel.r_addend = relocation - dtpoff_base (info); |
| 4118 | else |
| 4119 | outrel.r_addend = 0; |
| 4120 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 4121 | htab->etab.srelgot->reloc_count++; |
| 4122 | loc += sizeof (Elf32_External_Rela); |
| 4123 | } |
| 4124 | else |
| 4125 | bfd_put_32 (output_bfd, tpoff (info, relocation), |
| 4126 | htab->etab.sgot->contents + cur_off); |
| 4127 | cur_off += 4; |
| 4128 | } |
| 4129 | |
| 4130 | if (hh != NULL) |
| 4131 | hh->eh.got.offset |= 1; |
| 4132 | else |
| 4133 | local_got_offsets[r_symndx] |= 1; |
| 4134 | } |
| 4135 | |
| 4136 | if ((tls_type & GOT_NORMAL) != 0 |
| 4137 | && (tls_type & (GOT_TLS_GD | GOT_TLS_LDM | GOT_TLS_IE)) != 0) |
| 4138 | { |
| 4139 | if (hh != NULL) |
| 4140 | _bfd_error_handler (_("%s has both normal and TLS relocs"), |
| 4141 | hh_name (hh)); |
| 4142 | else |
| 4143 | { |
| 4144 | Elf_Internal_Sym *isym |
| 4145 | = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 4146 | input_bfd, r_symndx); |
| 4147 | if (isym == NULL) |
| 4148 | return FALSE; |
| 4149 | sym_name |
| 4150 | = bfd_elf_string_from_elf_section (input_bfd, |
| 4151 | symtab_hdr->sh_link, |
| 4152 | isym->st_name); |
| 4153 | if (sym_name == NULL) |
| 4154 | return FALSE; |
| 4155 | if (*sym_name == '\0') |
| 4156 | sym_name = bfd_section_name (input_bfd, sym_sec); |
| 4157 | _bfd_error_handler |
| 4158 | (_("%pB:%s has both normal and TLS relocs"), |
| 4159 | input_bfd, sym_name); |
| 4160 | } |
| 4161 | bfd_set_error (bfd_error_bad_value); |
| 4162 | return FALSE; |
| 4163 | } |
| 4164 | |
| 4165 | if ((tls_type & GOT_TLS_GD) |
| 4166 | && r_type != R_PARISC_TLS_GD21L |
| 4167 | && r_type != R_PARISC_TLS_GD14R) |
| 4168 | off += 2 * GOT_ENTRY_SIZE; |
| 4169 | |
| 4170 | /* Add the base of the GOT to the relocation value. */ |
| 4171 | relocation = (off |
| 4172 | + htab->etab.sgot->output_offset |
| 4173 | + htab->etab.sgot->output_section->vma); |
| 4174 | |
| 4175 | break; |
| 4176 | } |
| 4177 | |
| 4178 | case R_PARISC_TLS_LE21L: |
| 4179 | case R_PARISC_TLS_LE14R: |
| 4180 | { |
| 4181 | relocation = tpoff (info, relocation); |
| 4182 | break; |
| 4183 | } |
| 4184 | break; |
| 4185 | |
| 4186 | default: |
| 4187 | break; |
| 4188 | } |
| 4189 | |
| 4190 | rstatus = final_link_relocate (input_section, contents, rela, relocation, |
| 4191 | htab, sym_sec, hh, info); |
| 4192 | |
| 4193 | if (rstatus == bfd_reloc_ok) |
| 4194 | continue; |
| 4195 | |
| 4196 | if (hh != NULL) |
| 4197 | sym_name = hh_name (hh); |
| 4198 | else |
| 4199 | { |
| 4200 | sym_name = bfd_elf_string_from_elf_section (input_bfd, |
| 4201 | symtab_hdr->sh_link, |
| 4202 | sym->st_name); |
| 4203 | if (sym_name == NULL) |
| 4204 | return FALSE; |
| 4205 | if (*sym_name == '\0') |
| 4206 | sym_name = bfd_section_name (input_bfd, sym_sec); |
| 4207 | } |
| 4208 | |
| 4209 | howto = elf_hppa_howto_table + r_type; |
| 4210 | |
| 4211 | if (rstatus == bfd_reloc_undefined || rstatus == bfd_reloc_notsupported) |
| 4212 | { |
| 4213 | if (rstatus == bfd_reloc_notsupported || !warned_undef) |
| 4214 | { |
| 4215 | _bfd_error_handler |
| 4216 | /* xgettext:c-format */ |
| 4217 | (_("%pB(%pA+%#" PRIx64 "): cannot handle %s for %s"), |
| 4218 | input_bfd, |
| 4219 | input_section, |
| 4220 | (uint64_t) rela->r_offset, |
| 4221 | howto->name, |
| 4222 | sym_name); |
| 4223 | bfd_set_error (bfd_error_bad_value); |
| 4224 | return FALSE; |
| 4225 | } |
| 4226 | } |
| 4227 | else |
| 4228 | (*info->callbacks->reloc_overflow) |
| 4229 | (info, (hh ? &hh->eh.root : NULL), sym_name, howto->name, |
| 4230 | (bfd_vma) 0, input_bfd, input_section, rela->r_offset); |
| 4231 | } |
| 4232 | |
| 4233 | return TRUE; |
| 4234 | } |
| 4235 | |
| 4236 | /* Finish up dynamic symbol handling. We set the contents of various |
| 4237 | dynamic sections here. */ |
| 4238 | |
| 4239 | static bfd_boolean |
| 4240 | elf32_hppa_finish_dynamic_symbol (bfd *output_bfd, |
| 4241 | struct bfd_link_info *info, |
| 4242 | struct elf_link_hash_entry *eh, |
| 4243 | Elf_Internal_Sym *sym) |
| 4244 | { |
| 4245 | struct elf32_hppa_link_hash_table *htab; |
| 4246 | Elf_Internal_Rela rela; |
| 4247 | bfd_byte *loc; |
| 4248 | |
| 4249 | htab = hppa_link_hash_table (info); |
| 4250 | if (htab == NULL) |
| 4251 | return FALSE; |
| 4252 | |
| 4253 | if (eh->plt.offset != (bfd_vma) -1) |
| 4254 | { |
| 4255 | bfd_vma value; |
| 4256 | |
| 4257 | if (eh->plt.offset & 1) |
| 4258 | abort (); |
| 4259 | |
| 4260 | /* This symbol has an entry in the procedure linkage table. Set |
| 4261 | it up. |
| 4262 | |
| 4263 | The format of a plt entry is |
| 4264 | <funcaddr> |
| 4265 | <__gp> |
| 4266 | */ |
| 4267 | value = 0; |
| 4268 | if (eh->root.type == bfd_link_hash_defined |
| 4269 | || eh->root.type == bfd_link_hash_defweak) |
| 4270 | { |
| 4271 | value = eh->root.u.def.value; |
| 4272 | if (eh->root.u.def.section->output_section != NULL) |
| 4273 | value += (eh->root.u.def.section->output_offset |
| 4274 | + eh->root.u.def.section->output_section->vma); |
| 4275 | } |
| 4276 | |
| 4277 | /* Create a dynamic IPLT relocation for this entry. */ |
| 4278 | rela.r_offset = (eh->plt.offset |
| 4279 | + htab->etab.splt->output_offset |
| 4280 | + htab->etab.splt->output_section->vma); |
| 4281 | if (eh->dynindx != -1) |
| 4282 | { |
| 4283 | rela.r_info = ELF32_R_INFO (eh->dynindx, R_PARISC_IPLT); |
| 4284 | rela.r_addend = 0; |
| 4285 | } |
| 4286 | else |
| 4287 | { |
| 4288 | /* This symbol has been marked to become local, and is |
| 4289 | used by a plabel so must be kept in the .plt. */ |
| 4290 | rela.r_info = ELF32_R_INFO (0, R_PARISC_IPLT); |
| 4291 | rela.r_addend = value; |
| 4292 | } |
| 4293 | |
| 4294 | loc = htab->etab.srelplt->contents; |
| 4295 | loc += htab->etab.srelplt->reloc_count++ * sizeof (Elf32_External_Rela); |
| 4296 | bfd_elf32_swap_reloca_out (htab->etab.splt->output_section->owner, &rela, loc); |
| 4297 | |
| 4298 | if (!eh->def_regular) |
| 4299 | { |
| 4300 | /* Mark the symbol as undefined, rather than as defined in |
| 4301 | the .plt section. Leave the value alone. */ |
| 4302 | sym->st_shndx = SHN_UNDEF; |
| 4303 | } |
| 4304 | } |
| 4305 | |
| 4306 | if (eh->got.offset != (bfd_vma) -1 |
| 4307 | && (hppa_elf_hash_entry (eh)->tls_type & GOT_NORMAL) != 0 |
| 4308 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, eh)) |
| 4309 | { |
| 4310 | bfd_boolean is_dyn = (eh->dynindx != -1 |
| 4311 | && !SYMBOL_REFERENCES_LOCAL (info, eh)); |
| 4312 | |
| 4313 | if (is_dyn || bfd_link_pic (info)) |
| 4314 | { |
| 4315 | /* This symbol has an entry in the global offset table. Set |
| 4316 | it up. */ |
| 4317 | |
| 4318 | rela.r_offset = ((eh->got.offset &~ (bfd_vma) 1) |
| 4319 | + htab->etab.sgot->output_offset |
| 4320 | + htab->etab.sgot->output_section->vma); |
| 4321 | |
| 4322 | /* If this is a -Bsymbolic link and the symbol is defined |
| 4323 | locally or was forced to be local because of a version |
| 4324 | file, we just want to emit a RELATIVE reloc. The entry |
| 4325 | in the global offset table will already have been |
| 4326 | initialized in the relocate_section function. */ |
| 4327 | if (!is_dyn) |
| 4328 | { |
| 4329 | rela.r_info = ELF32_R_INFO (0, R_PARISC_DIR32); |
| 4330 | rela.r_addend = (eh->root.u.def.value |
| 4331 | + eh->root.u.def.section->output_offset |
| 4332 | + eh->root.u.def.section->output_section->vma); |
| 4333 | } |
| 4334 | else |
| 4335 | { |
| 4336 | if ((eh->got.offset & 1) != 0) |
| 4337 | abort (); |
| 4338 | |
| 4339 | bfd_put_32 (output_bfd, 0, |
| 4340 | htab->etab.sgot->contents + (eh->got.offset & ~1)); |
| 4341 | rela.r_info = ELF32_R_INFO (eh->dynindx, R_PARISC_DIR32); |
| 4342 | rela.r_addend = 0; |
| 4343 | } |
| 4344 | |
| 4345 | loc = htab->etab.srelgot->contents; |
| 4346 | loc += (htab->etab.srelgot->reloc_count++ |
| 4347 | * sizeof (Elf32_External_Rela)); |
| 4348 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 4349 | } |
| 4350 | } |
| 4351 | |
| 4352 | if (eh->needs_copy) |
| 4353 | { |
| 4354 | asection *sec; |
| 4355 | |
| 4356 | /* This symbol needs a copy reloc. Set it up. */ |
| 4357 | |
| 4358 | if (! (eh->dynindx != -1 |
| 4359 | && (eh->root.type == bfd_link_hash_defined |
| 4360 | || eh->root.type == bfd_link_hash_defweak))) |
| 4361 | abort (); |
| 4362 | |
| 4363 | rela.r_offset = (eh->root.u.def.value |
| 4364 | + eh->root.u.def.section->output_offset |
| 4365 | + eh->root.u.def.section->output_section->vma); |
| 4366 | rela.r_addend = 0; |
| 4367 | rela.r_info = ELF32_R_INFO (eh->dynindx, R_PARISC_COPY); |
| 4368 | if (eh->root.u.def.section == htab->etab.sdynrelro) |
| 4369 | sec = htab->etab.sreldynrelro; |
| 4370 | else |
| 4371 | sec = htab->etab.srelbss; |
| 4372 | loc = sec->contents + sec->reloc_count++ * sizeof (Elf32_External_Rela); |
| 4373 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 4374 | } |
| 4375 | |
| 4376 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 4377 | if (eh == htab->etab.hdynamic || eh == htab->etab.hgot) |
| 4378 | { |
| 4379 | sym->st_shndx = SHN_ABS; |
| 4380 | } |
| 4381 | |
| 4382 | return TRUE; |
| 4383 | } |
| 4384 | |
| 4385 | /* Used to decide how to sort relocs in an optimal manner for the |
| 4386 | dynamic linker, before writing them out. */ |
| 4387 | |
| 4388 | static enum elf_reloc_type_class |
| 4389 | elf32_hppa_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 4390 | const asection *rel_sec ATTRIBUTE_UNUSED, |
| 4391 | const Elf_Internal_Rela *rela) |
| 4392 | { |
| 4393 | /* Handle TLS relocs first; we don't want them to be marked |
| 4394 | relative by the "if (ELF32_R_SYM (rela->r_info) == STN_UNDEF)" |
| 4395 | check below. */ |
| 4396 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 4397 | { |
| 4398 | case R_PARISC_TLS_DTPMOD32: |
| 4399 | case R_PARISC_TLS_DTPOFF32: |
| 4400 | case R_PARISC_TLS_TPREL32: |
| 4401 | return reloc_class_normal; |
| 4402 | } |
| 4403 | |
| 4404 | if (ELF32_R_SYM (rela->r_info) == STN_UNDEF) |
| 4405 | return reloc_class_relative; |
| 4406 | |
| 4407 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 4408 | { |
| 4409 | case R_PARISC_IPLT: |
| 4410 | return reloc_class_plt; |
| 4411 | case R_PARISC_COPY: |
| 4412 | return reloc_class_copy; |
| 4413 | default: |
| 4414 | return reloc_class_normal; |
| 4415 | } |
| 4416 | } |
| 4417 | |
| 4418 | /* Finish up the dynamic sections. */ |
| 4419 | |
| 4420 | static bfd_boolean |
| 4421 | elf32_hppa_finish_dynamic_sections (bfd *output_bfd, |
| 4422 | struct bfd_link_info *info) |
| 4423 | { |
| 4424 | bfd *dynobj; |
| 4425 | struct elf32_hppa_link_hash_table *htab; |
| 4426 | asection *sdyn; |
| 4427 | asection * sgot; |
| 4428 | |
| 4429 | htab = hppa_link_hash_table (info); |
| 4430 | if (htab == NULL) |
| 4431 | return FALSE; |
| 4432 | |
| 4433 | dynobj = htab->etab.dynobj; |
| 4434 | |
| 4435 | sgot = htab->etab.sgot; |
| 4436 | /* A broken linker script might have discarded the dynamic sections. |
| 4437 | Catch this here so that we do not seg-fault later on. */ |
| 4438 | if (sgot != NULL && bfd_is_abs_section (sgot->output_section)) |
| 4439 | return FALSE; |
| 4440 | |
| 4441 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 4442 | |
| 4443 | if (htab->etab.dynamic_sections_created) |
| 4444 | { |
| 4445 | Elf32_External_Dyn *dyncon, *dynconend; |
| 4446 | |
| 4447 | if (sdyn == NULL) |
| 4448 | abort (); |
| 4449 | |
| 4450 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 4451 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 4452 | for (; dyncon < dynconend; dyncon++) |
| 4453 | { |
| 4454 | Elf_Internal_Dyn dyn; |
| 4455 | asection *s; |
| 4456 | |
| 4457 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 4458 | |
| 4459 | switch (dyn.d_tag) |
| 4460 | { |
| 4461 | default: |
| 4462 | continue; |
| 4463 | |
| 4464 | case DT_PLTGOT: |
| 4465 | /* Use PLTGOT to set the GOT register. */ |
| 4466 | dyn.d_un.d_ptr = elf_gp (output_bfd); |
| 4467 | break; |
| 4468 | |
| 4469 | case DT_JMPREL: |
| 4470 | s = htab->etab.srelplt; |
| 4471 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 4472 | break; |
| 4473 | |
| 4474 | case DT_PLTRELSZ: |
| 4475 | s = htab->etab.srelplt; |
| 4476 | dyn.d_un.d_val = s->size; |
| 4477 | break; |
| 4478 | } |
| 4479 | |
| 4480 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4481 | } |
| 4482 | } |
| 4483 | |
| 4484 | if (sgot != NULL && sgot->size != 0) |
| 4485 | { |
| 4486 | /* Fill in the first entry in the global offset table. |
| 4487 | We use it to point to our dynamic section, if we have one. */ |
| 4488 | bfd_put_32 (output_bfd, |
| 4489 | sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0, |
| 4490 | sgot->contents); |
| 4491 | |
| 4492 | /* The second entry is reserved for use by the dynamic linker. */ |
| 4493 | memset (sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE); |
| 4494 | |
| 4495 | /* Set .got entry size. */ |
| 4496 | elf_section_data (sgot->output_section) |
| 4497 | ->this_hdr.sh_entsize = GOT_ENTRY_SIZE; |
| 4498 | } |
| 4499 | |
| 4500 | if (htab->etab.splt != NULL && htab->etab.splt->size != 0) |
| 4501 | { |
| 4502 | /* Set plt entry size to 0 instead of PLT_ENTRY_SIZE, since we add the |
| 4503 | plt stubs and as such the section does not hold a table of fixed-size |
| 4504 | entries. */ |
| 4505 | elf_section_data (htab->etab.splt->output_section)->this_hdr.sh_entsize = 0; |
| 4506 | |
| 4507 | if (htab->need_plt_stub) |
| 4508 | { |
| 4509 | /* Set up the .plt stub. */ |
| 4510 | memcpy (htab->etab.splt->contents |
| 4511 | + htab->etab.splt->size - sizeof (plt_stub), |
| 4512 | plt_stub, sizeof (plt_stub)); |
| 4513 | |
| 4514 | if ((htab->etab.splt->output_offset |
| 4515 | + htab->etab.splt->output_section->vma |
| 4516 | + htab->etab.splt->size) |
| 4517 | != (sgot->output_offset |
| 4518 | + sgot->output_section->vma)) |
| 4519 | { |
| 4520 | _bfd_error_handler |
| 4521 | (_(".got section not immediately after .plt section")); |
| 4522 | return FALSE; |
| 4523 | } |
| 4524 | } |
| 4525 | } |
| 4526 | |
| 4527 | return TRUE; |
| 4528 | } |
| 4529 | |
| 4530 | /* Called when writing out an object file to decide the type of a |
| 4531 | symbol. */ |
| 4532 | static int |
| 4533 | elf32_hppa_elf_get_symbol_type (Elf_Internal_Sym *elf_sym, int type) |
| 4534 | { |
| 4535 | if (ELF_ST_TYPE (elf_sym->st_info) == STT_PARISC_MILLI) |
| 4536 | return STT_PARISC_MILLI; |
| 4537 | else |
| 4538 | return type; |
| 4539 | } |
| 4540 | |
| 4541 | /* Misc BFD support code. */ |
| 4542 | #define bfd_elf32_bfd_is_local_label_name elf_hppa_is_local_label_name |
| 4543 | #define bfd_elf32_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup |
| 4544 | #define bfd_elf32_bfd_reloc_name_lookup elf_hppa_reloc_name_lookup |
| 4545 | #define elf_info_to_howto elf_hppa_info_to_howto |
| 4546 | #define elf_info_to_howto_rel elf_hppa_info_to_howto_rel |
| 4547 | |
| 4548 | /* Stuff for the BFD linker. */ |
| 4549 | #define bfd_elf32_bfd_final_link elf32_hppa_final_link |
| 4550 | #define bfd_elf32_bfd_link_hash_table_create elf32_hppa_link_hash_table_create |
| 4551 | #define elf_backend_adjust_dynamic_symbol elf32_hppa_adjust_dynamic_symbol |
| 4552 | #define elf_backend_copy_indirect_symbol elf32_hppa_copy_indirect_symbol |
| 4553 | #define elf_backend_check_relocs elf32_hppa_check_relocs |
| 4554 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
| 4555 | #define elf_backend_create_dynamic_sections elf32_hppa_create_dynamic_sections |
| 4556 | #define elf_backend_fake_sections elf_hppa_fake_sections |
| 4557 | #define elf_backend_relocate_section elf32_hppa_relocate_section |
| 4558 | #define elf_backend_hide_symbol elf32_hppa_hide_symbol |
| 4559 | #define elf_backend_finish_dynamic_symbol elf32_hppa_finish_dynamic_symbol |
| 4560 | #define elf_backend_finish_dynamic_sections elf32_hppa_finish_dynamic_sections |
| 4561 | #define elf_backend_size_dynamic_sections elf32_hppa_size_dynamic_sections |
| 4562 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
| 4563 | #define elf_backend_gc_mark_hook elf32_hppa_gc_mark_hook |
| 4564 | #define elf_backend_grok_prstatus elf32_hppa_grok_prstatus |
| 4565 | #define elf_backend_grok_psinfo elf32_hppa_grok_psinfo |
| 4566 | #define elf_backend_object_p elf32_hppa_object_p |
| 4567 | #define elf_backend_final_write_processing elf_hppa_final_write_processing |
| 4568 | #define elf_backend_get_symbol_type elf32_hppa_elf_get_symbol_type |
| 4569 | #define elf_backend_reloc_type_class elf32_hppa_reloc_type_class |
| 4570 | #define elf_backend_action_discarded elf_hppa_action_discarded |
| 4571 | |
| 4572 | #define elf_backend_can_gc_sections 1 |
| 4573 | #define elf_backend_can_refcount 1 |
| 4574 | #define elf_backend_plt_alignment 2 |
| 4575 | #define elf_backend_want_got_plt 0 |
| 4576 | #define elf_backend_plt_readonly 0 |
| 4577 | #define elf_backend_want_plt_sym 0 |
| 4578 | #define elf_backend_got_header_size 8 |
| 4579 | #define elf_backend_want_dynrelro 1 |
| 4580 | #define elf_backend_rela_normal 1 |
| 4581 | #define elf_backend_dtrel_excludes_plt 1 |
| 4582 | #define elf_backend_no_page_alias 1 |
| 4583 | |
| 4584 | #define TARGET_BIG_SYM hppa_elf32_vec |
| 4585 | #define TARGET_BIG_NAME "elf32-hppa" |
| 4586 | #define ELF_ARCH bfd_arch_hppa |
| 4587 | #define ELF_TARGET_ID HPPA32_ELF_DATA |
| 4588 | #define ELF_MACHINE_CODE EM_PARISC |
| 4589 | #define ELF_MAXPAGESIZE 0x1000 |
| 4590 | #define ELF_OSABI ELFOSABI_HPUX |
| 4591 | #define elf32_bed elf32_hppa_hpux_bed |
| 4592 | |
| 4593 | #include "elf32-target.h" |
| 4594 | |
| 4595 | #undef TARGET_BIG_SYM |
| 4596 | #define TARGET_BIG_SYM hppa_elf32_linux_vec |
| 4597 | #undef TARGET_BIG_NAME |
| 4598 | #define TARGET_BIG_NAME "elf32-hppa-linux" |
| 4599 | #undef ELF_OSABI |
| 4600 | #define ELF_OSABI ELFOSABI_GNU |
| 4601 | #undef elf32_bed |
| 4602 | #define elf32_bed elf32_hppa_linux_bed |
| 4603 | |
| 4604 | #include "elf32-target.h" |
| 4605 | |
| 4606 | #undef TARGET_BIG_SYM |
| 4607 | #define TARGET_BIG_SYM hppa_elf32_nbsd_vec |
| 4608 | #undef TARGET_BIG_NAME |
| 4609 | #define TARGET_BIG_NAME "elf32-hppa-netbsd" |
| 4610 | #undef ELF_OSABI |
| 4611 | #define ELF_OSABI ELFOSABI_NETBSD |
| 4612 | #undef elf32_bed |
| 4613 | #define elf32_bed elf32_hppa_netbsd_bed |
| 4614 | |
| 4615 | #include "elf32-target.h" |