| 1 | /* PowerPC-specific support for 32-bit ELF |
| 2 | Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 |
| 3 | Free Software Foundation, Inc. |
| 4 | Written by Ian Lance Taylor, Cygnus Support. |
| 5 | |
| 6 | This file is part of BFD, the Binary File Descriptor library. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the |
| 20 | Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 21 | Boston, MA 02111-1307, USA. */ |
| 22 | |
| 23 | /* This file is based on a preliminary PowerPC ELF ABI. The |
| 24 | information may not match the final PowerPC ELF ABI. It includes |
| 25 | suggestions from the in-progress Embedded PowerPC ABI, and that |
| 26 | information may also not match. */ |
| 27 | |
| 28 | #include "bfd.h" |
| 29 | #include "sysdep.h" |
| 30 | #include "bfdlink.h" |
| 31 | #include "libbfd.h" |
| 32 | #include "elf-bfd.h" |
| 33 | #include "elf/ppc.h" |
| 34 | #include "elf32-ppc.h" |
| 35 | |
| 36 | /* RELA relocations are used here. */ |
| 37 | |
| 38 | static struct bfd_hash_entry *ppc_elf_link_hash_newfunc |
| 39 | PARAMS ((struct bfd_hash_entry *entry, struct bfd_hash_table *table, |
| 40 | const char *string)); |
| 41 | static struct bfd_link_hash_table *ppc_elf_link_hash_table_create |
| 42 | PARAMS ((bfd *abfd)); |
| 43 | static void ppc_elf_copy_indirect_symbol |
| 44 | PARAMS ((struct elf_backend_data *bed, struct elf_link_hash_entry *dir, |
| 45 | struct elf_link_hash_entry *ind)); |
| 46 | static reloc_howto_type *ppc_elf_reloc_type_lookup |
| 47 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); |
| 48 | static void ppc_elf_info_to_howto |
| 49 | PARAMS ((bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)); |
| 50 | static void ppc_elf_howto_init |
| 51 | PARAMS ((void)); |
| 52 | static int ppc_elf_sort_rela |
| 53 | PARAMS ((const PTR, const PTR)); |
| 54 | static bfd_boolean ppc_elf_relax_section |
| 55 | PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *)); |
| 56 | static bfd_reloc_status_type ppc_elf_addr16_ha_reloc |
| 57 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 58 | static bfd_reloc_status_type ppc_elf_unhandled_reloc |
| 59 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 60 | static bfd_boolean ppc_elf_object_p |
| 61 | PARAMS ((bfd *)); |
| 62 | static bfd_boolean ppc_elf_set_private_flags |
| 63 | PARAMS ((bfd *, flagword)); |
| 64 | static bfd_boolean ppc_elf_merge_private_bfd_data |
| 65 | PARAMS ((bfd *, bfd *)); |
| 66 | static int ppc_elf_additional_program_headers |
| 67 | PARAMS ((bfd *)); |
| 68 | static bfd_boolean ppc_elf_modify_segment_map |
| 69 | PARAMS ((bfd *)); |
| 70 | static bfd_boolean ppc_elf_create_got |
| 71 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 72 | static bfd_boolean ppc_elf_create_dynamic_sections |
| 73 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 74 | static bfd_boolean ppc_elf_section_from_shdr |
| 75 | PARAMS ((bfd *, Elf_Internal_Shdr *, const char *)); |
| 76 | static bfd_boolean ppc_elf_fake_sections |
| 77 | PARAMS ((bfd *, Elf_Internal_Shdr *, asection *)); |
| 78 | static elf_linker_section_t *ppc_elf_create_linker_section |
| 79 | PARAMS ((bfd *abfd, struct bfd_link_info *info, |
| 80 | enum elf_linker_section_enum)); |
| 81 | static bfd_boolean update_local_sym_info |
| 82 | PARAMS ((bfd *, Elf_Internal_Shdr *, unsigned long, int)); |
| 83 | static void bad_shared_reloc |
| 84 | PARAMS ((bfd *, enum elf_ppc_reloc_type)); |
| 85 | static bfd_boolean ppc_elf_check_relocs |
| 86 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| 87 | const Elf_Internal_Rela *)); |
| 88 | static asection *ppc_elf_gc_mark_hook |
| 89 | PARAMS ((asection *sec, struct bfd_link_info *info, Elf_Internal_Rela *rel, |
| 90 | struct elf_link_hash_entry *h, Elf_Internal_Sym *sym)); |
| 91 | static bfd_boolean ppc_elf_gc_sweep_hook |
| 92 | PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *sec, |
| 93 | const Elf_Internal_Rela *relocs)); |
| 94 | static bfd_boolean ppc_elf_adjust_dynamic_symbol |
| 95 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
| 96 | static bfd_boolean allocate_dynrelocs |
| 97 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
| 98 | static bfd_boolean readonly_dynrelocs |
| 99 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
| 100 | static bfd_boolean ppc_elf_size_dynamic_sections |
| 101 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 102 | static bfd_boolean ppc_elf_relocate_section |
| 103 | PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *, |
| 104 | Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms, |
| 105 | asection **)); |
| 106 | static bfd_boolean ppc_elf_add_symbol_hook |
| 107 | PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, |
| 108 | const char **, flagword *, asection **, bfd_vma *)); |
| 109 | static bfd_boolean ppc_elf_finish_dynamic_symbol |
| 110 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
| 111 | Elf_Internal_Sym *)); |
| 112 | static bfd_boolean ppc_elf_finish_dynamic_sections |
| 113 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 114 | static enum elf_reloc_type_class ppc_elf_reloc_type_class |
| 115 | PARAMS ((const Elf_Internal_Rela *)); |
| 116 | static bfd_boolean ppc_elf_grok_prstatus |
| 117 | PARAMS ((bfd *abfd, Elf_Internal_Note *note)); |
| 118 | static bfd_boolean ppc_elf_grok_psinfo |
| 119 | PARAMS ((bfd *abfd, Elf_Internal_Note *note)); |
| 120 | |
| 121 | /* Branch prediction bit for branch taken relocs. */ |
| 122 | #define BRANCH_PREDICT_BIT 0x200000 |
| 123 | /* Mask to set RA in memory instructions. */ |
| 124 | #define RA_REGISTER_MASK 0x001f0000 |
| 125 | /* Value to shift register by to insert RA. */ |
| 126 | #define RA_REGISTER_SHIFT 16 |
| 127 | |
| 128 | /* The name of the dynamic interpreter. This is put in the .interp |
| 129 | section. */ |
| 130 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| 131 | |
| 132 | /* The size in bytes of an entry in the procedure linkage table. */ |
| 133 | #define PLT_ENTRY_SIZE 12 |
| 134 | /* The initial size of the plt reserved for the dynamic linker. */ |
| 135 | #define PLT_INITIAL_ENTRY_SIZE 72 |
| 136 | /* The size of the gap between entries in the PLT. */ |
| 137 | #define PLT_SLOT_SIZE 8 |
| 138 | /* The number of single-slot PLT entries (the rest use two slots). */ |
| 139 | #define PLT_NUM_SINGLE_ENTRIES 8192 |
| 140 | |
| 141 | /* Some nop instructions. */ |
| 142 | #define NOP 0x60000000 |
| 143 | #define CROR_151515 0x4def7b82 |
| 144 | #define CROR_313131 0x4ffffb82 |
| 145 | |
| 146 | /* Offset of tp and dtp pointers from start of TLS block. */ |
| 147 | #define TP_OFFSET 0x7000 |
| 148 | #define DTP_OFFSET 0x8000 |
| 149 | |
| 150 | /* Will references to this symbol always reference the symbol |
| 151 | in this object? STV_PROTECTED is excluded from the visibility test |
| 152 | here so that function pointer comparisons work properly. Since |
| 153 | function symbols not defined in an app are set to their .plt entry, |
| 154 | it's necessary for shared libs to also reference the .plt even |
| 155 | though the symbol is really local to the shared lib. */ |
| 156 | #define SYMBOL_REFERENCES_LOCAL(INFO, H) \ |
| 157 | ((! INFO->shared \ |
| 158 | || INFO->symbolic \ |
| 159 | || H->dynindx == -1 \ |
| 160 | || ELF_ST_VISIBILITY (H->other) == STV_INTERNAL \ |
| 161 | || ELF_ST_VISIBILITY (H->other) == STV_HIDDEN) \ |
| 162 | && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) |
| 163 | |
| 164 | /* Will _calls_ to this symbol always call the version in this object? */ |
| 165 | #define SYMBOL_CALLS_LOCAL(INFO, H) \ |
| 166 | ((! INFO->shared \ |
| 167 | || INFO->symbolic \ |
| 168 | || H->dynindx == -1 \ |
| 169 | || ELF_ST_VISIBILITY (H->other) != STV_DEFAULT) \ |
| 170 | && (H->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) |
| 171 | \f |
| 172 | /* The PPC linker needs to keep track of the number of relocs that it |
| 173 | decides to copy as dynamic relocs in check_relocs for each symbol. |
| 174 | This is so that it can later discard them if they are found to be |
| 175 | unnecessary. We store the information in a field extending the |
| 176 | regular ELF linker hash table. */ |
| 177 | |
| 178 | struct ppc_elf_dyn_relocs |
| 179 | { |
| 180 | struct ppc_elf_dyn_relocs *next; |
| 181 | |
| 182 | /* The input section of the reloc. */ |
| 183 | asection *sec; |
| 184 | |
| 185 | /* Total number of relocs copied for the input section. */ |
| 186 | bfd_size_type count; |
| 187 | |
| 188 | /* Number of pc-relative relocs copied for the input section. */ |
| 189 | bfd_size_type pc_count; |
| 190 | }; |
| 191 | |
| 192 | /* PPC ELF linker hash entry. */ |
| 193 | |
| 194 | struct ppc_elf_link_hash_entry |
| 195 | { |
| 196 | struct elf_link_hash_entry elf; |
| 197 | |
| 198 | /* Track dynamic relocs copied for this symbol. */ |
| 199 | struct ppc_elf_dyn_relocs *dyn_relocs; |
| 200 | |
| 201 | /* Contexts in which symbol is used in the GOT (or TOC). |
| 202 | TLS_GD .. TLS_TLS bits are or'd into the mask as the |
| 203 | corresponding relocs are encountered during check_relocs. |
| 204 | tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to |
| 205 | indicate the corresponding GOT entry type is not needed. */ |
| 206 | #define TLS_GD 1 /* GD reloc. */ |
| 207 | #define TLS_LD 2 /* LD reloc. */ |
| 208 | #define TLS_TPREL 4 /* TPREL reloc, => IE. */ |
| 209 | #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ |
| 210 | #define TLS_TLS 16 /* Any TLS reloc. */ |
| 211 | #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */ |
| 212 | char tls_mask; |
| 213 | }; |
| 214 | |
| 215 | #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) |
| 216 | |
| 217 | /* PPC ELF linker hash table. */ |
| 218 | |
| 219 | struct ppc_elf_link_hash_table |
| 220 | { |
| 221 | struct elf_link_hash_table elf; |
| 222 | |
| 223 | /* Short-cuts to get to dynamic linker sections. */ |
| 224 | asection *got; |
| 225 | asection *relgot; |
| 226 | asection *plt; |
| 227 | asection *relplt; |
| 228 | asection *dynbss; |
| 229 | asection *relbss; |
| 230 | asection *dynsbss; |
| 231 | asection *relsbss; |
| 232 | elf_linker_section_t *sdata; |
| 233 | elf_linker_section_t *sdata2; |
| 234 | |
| 235 | /* Short-cut to first output tls section. */ |
| 236 | asection *tls_sec; |
| 237 | |
| 238 | /* Shortcut to .__tls_get_addr. */ |
| 239 | struct elf_link_hash_entry *tls_get_addr; |
| 240 | |
| 241 | /* TLS local dynamic got entry handling. */ |
| 242 | union { |
| 243 | bfd_signed_vma refcount; |
| 244 | bfd_vma offset; |
| 245 | } tlsld_got; |
| 246 | |
| 247 | /* Small local sym to section mapping cache. */ |
| 248 | struct sym_sec_cache sym_sec; |
| 249 | }; |
| 250 | |
| 251 | /* Get the PPC ELF linker hash table from a link_info structure. */ |
| 252 | |
| 253 | #define ppc_elf_hash_table(p) \ |
| 254 | ((struct ppc_elf_link_hash_table *) (p)->hash) |
| 255 | |
| 256 | /* Create an entry in a PPC ELF linker hash table. */ |
| 257 | |
| 258 | static struct bfd_hash_entry * |
| 259 | ppc_elf_link_hash_newfunc (entry, table, string) |
| 260 | struct bfd_hash_entry *entry; |
| 261 | struct bfd_hash_table *table; |
| 262 | const char *string; |
| 263 | { |
| 264 | /* Allocate the structure if it has not already been allocated by a |
| 265 | subclass. */ |
| 266 | if (entry == NULL) |
| 267 | { |
| 268 | entry = bfd_hash_allocate (table, |
| 269 | sizeof (struct ppc_elf_link_hash_entry)); |
| 270 | if (entry == NULL) |
| 271 | return entry; |
| 272 | } |
| 273 | |
| 274 | /* Call the allocation method of the superclass. */ |
| 275 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| 276 | if (entry != NULL) |
| 277 | { |
| 278 | ppc_elf_hash_entry (entry)->dyn_relocs = NULL; |
| 279 | ppc_elf_hash_entry (entry)->tls_mask = 0; |
| 280 | } |
| 281 | |
| 282 | return entry; |
| 283 | } |
| 284 | |
| 285 | /* Create a PPC ELF linker hash table. */ |
| 286 | |
| 287 | static struct bfd_link_hash_table * |
| 288 | ppc_elf_link_hash_table_create (abfd) |
| 289 | bfd *abfd; |
| 290 | { |
| 291 | struct ppc_elf_link_hash_table *ret; |
| 292 | |
| 293 | ret = ((struct ppc_elf_link_hash_table *) |
| 294 | bfd_malloc (sizeof (struct ppc_elf_link_hash_table))); |
| 295 | if (ret == NULL) |
| 296 | return NULL; |
| 297 | |
| 298 | if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, |
| 299 | ppc_elf_link_hash_newfunc)) |
| 300 | { |
| 301 | free (ret); |
| 302 | return NULL; |
| 303 | } |
| 304 | |
| 305 | ret->got = NULL; |
| 306 | ret->relgot = NULL; |
| 307 | ret->plt = NULL; |
| 308 | ret->relplt = NULL; |
| 309 | ret->dynbss = NULL; |
| 310 | ret->relbss = NULL; |
| 311 | ret->dynsbss = NULL; |
| 312 | ret->relsbss = NULL; |
| 313 | ret->sdata = NULL; |
| 314 | ret->sdata2 = NULL; |
| 315 | ret->tls_sec = NULL; |
| 316 | ret->tls_get_addr = NULL; |
| 317 | ret->tlsld_got.refcount = 0; |
| 318 | ret->sym_sec.abfd = NULL; |
| 319 | |
| 320 | return &ret->elf.root; |
| 321 | } |
| 322 | |
| 323 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
| 324 | copying dynamic variables from a shared lib into an app's dynbss |
| 325 | section, and instead use a dynamic relocation to point into the |
| 326 | shared lib. */ |
| 327 | #define ELIMINATE_COPY_RELOCS 1 |
| 328 | |
| 329 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 330 | |
| 331 | static void |
| 332 | ppc_elf_copy_indirect_symbol (bed, dir, ind) |
| 333 | struct elf_backend_data *bed; |
| 334 | struct elf_link_hash_entry *dir, *ind; |
| 335 | { |
| 336 | struct ppc_elf_link_hash_entry *edir, *eind; |
| 337 | |
| 338 | edir = (struct ppc_elf_link_hash_entry *) dir; |
| 339 | eind = (struct ppc_elf_link_hash_entry *) ind; |
| 340 | |
| 341 | if (eind->dyn_relocs != NULL) |
| 342 | { |
| 343 | if (edir->dyn_relocs != NULL) |
| 344 | { |
| 345 | struct ppc_elf_dyn_relocs **pp; |
| 346 | struct ppc_elf_dyn_relocs *p; |
| 347 | |
| 348 | if (ind->root.type == bfd_link_hash_indirect) |
| 349 | abort (); |
| 350 | |
| 351 | /* Add reloc counts against the weak sym to the strong sym |
| 352 | list. Merge any entries against the same section. */ |
| 353 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) |
| 354 | { |
| 355 | struct ppc_elf_dyn_relocs *q; |
| 356 | |
| 357 | for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| 358 | if (q->sec == p->sec) |
| 359 | { |
| 360 | q->pc_count += p->pc_count; |
| 361 | q->count += p->count; |
| 362 | *pp = p->next; |
| 363 | break; |
| 364 | } |
| 365 | if (q == NULL) |
| 366 | pp = &p->next; |
| 367 | } |
| 368 | *pp = edir->dyn_relocs; |
| 369 | } |
| 370 | |
| 371 | edir->dyn_relocs = eind->dyn_relocs; |
| 372 | eind->dyn_relocs = NULL; |
| 373 | } |
| 374 | |
| 375 | edir->tls_mask |= eind->tls_mask; |
| 376 | |
| 377 | if (ELIMINATE_COPY_RELOCS |
| 378 | && ind->root.type != bfd_link_hash_indirect |
| 379 | && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) |
| 380 | /* If called to transfer flags for a weakdef during processing |
| 381 | of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF. |
| 382 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ |
| 383 | dir->elf_link_hash_flags |= |
| 384 | (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC |
| 385 | | ELF_LINK_HASH_REF_REGULAR |
| 386 | | ELF_LINK_HASH_REF_REGULAR_NONWEAK)); |
| 387 | else |
| 388 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); |
| 389 | } |
| 390 | \f |
| 391 | static reloc_howto_type *ppc_elf_howto_table[(int) R_PPC_max]; |
| 392 | |
| 393 | static reloc_howto_type ppc_elf_howto_raw[] = { |
| 394 | /* This reloc does nothing. */ |
| 395 | HOWTO (R_PPC_NONE, /* type */ |
| 396 | 0, /* rightshift */ |
| 397 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 398 | 32, /* bitsize */ |
| 399 | FALSE, /* pc_relative */ |
| 400 | 0, /* bitpos */ |
| 401 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 402 | bfd_elf_generic_reloc, /* special_function */ |
| 403 | "R_PPC_NONE", /* name */ |
| 404 | FALSE, /* partial_inplace */ |
| 405 | 0, /* src_mask */ |
| 406 | 0, /* dst_mask */ |
| 407 | FALSE), /* pcrel_offset */ |
| 408 | |
| 409 | /* A standard 32 bit relocation. */ |
| 410 | HOWTO (R_PPC_ADDR32, /* type */ |
| 411 | 0, /* rightshift */ |
| 412 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 413 | 32, /* bitsize */ |
| 414 | FALSE, /* pc_relative */ |
| 415 | 0, /* bitpos */ |
| 416 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 417 | bfd_elf_generic_reloc, /* special_function */ |
| 418 | "R_PPC_ADDR32", /* name */ |
| 419 | FALSE, /* partial_inplace */ |
| 420 | 0, /* src_mask */ |
| 421 | 0xffffffff, /* dst_mask */ |
| 422 | FALSE), /* pcrel_offset */ |
| 423 | |
| 424 | /* An absolute 26 bit branch; the lower two bits must be zero. |
| 425 | FIXME: we don't check that, we just clear them. */ |
| 426 | HOWTO (R_PPC_ADDR24, /* type */ |
| 427 | 0, /* rightshift */ |
| 428 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 429 | 26, /* bitsize */ |
| 430 | FALSE, /* pc_relative */ |
| 431 | 0, /* bitpos */ |
| 432 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 433 | bfd_elf_generic_reloc, /* special_function */ |
| 434 | "R_PPC_ADDR24", /* name */ |
| 435 | FALSE, /* partial_inplace */ |
| 436 | 0, /* src_mask */ |
| 437 | 0x3fffffc, /* dst_mask */ |
| 438 | FALSE), /* pcrel_offset */ |
| 439 | |
| 440 | /* A standard 16 bit relocation. */ |
| 441 | HOWTO (R_PPC_ADDR16, /* type */ |
| 442 | 0, /* rightshift */ |
| 443 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 444 | 16, /* bitsize */ |
| 445 | FALSE, /* pc_relative */ |
| 446 | 0, /* bitpos */ |
| 447 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 448 | bfd_elf_generic_reloc, /* special_function */ |
| 449 | "R_PPC_ADDR16", /* name */ |
| 450 | FALSE, /* partial_inplace */ |
| 451 | 0, /* src_mask */ |
| 452 | 0xffff, /* dst_mask */ |
| 453 | FALSE), /* pcrel_offset */ |
| 454 | |
| 455 | /* A 16 bit relocation without overflow. */ |
| 456 | HOWTO (R_PPC_ADDR16_LO, /* type */ |
| 457 | 0, /* rightshift */ |
| 458 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 459 | 16, /* bitsize */ |
| 460 | FALSE, /* pc_relative */ |
| 461 | 0, /* bitpos */ |
| 462 | complain_overflow_dont,/* complain_on_overflow */ |
| 463 | bfd_elf_generic_reloc, /* special_function */ |
| 464 | "R_PPC_ADDR16_LO", /* name */ |
| 465 | FALSE, /* partial_inplace */ |
| 466 | 0, /* src_mask */ |
| 467 | 0xffff, /* dst_mask */ |
| 468 | FALSE), /* pcrel_offset */ |
| 469 | |
| 470 | /* The high order 16 bits of an address. */ |
| 471 | HOWTO (R_PPC_ADDR16_HI, /* type */ |
| 472 | 16, /* rightshift */ |
| 473 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 474 | 16, /* bitsize */ |
| 475 | FALSE, /* pc_relative */ |
| 476 | 0, /* bitpos */ |
| 477 | complain_overflow_dont, /* complain_on_overflow */ |
| 478 | bfd_elf_generic_reloc, /* special_function */ |
| 479 | "R_PPC_ADDR16_HI", /* name */ |
| 480 | FALSE, /* partial_inplace */ |
| 481 | 0, /* src_mask */ |
| 482 | 0xffff, /* dst_mask */ |
| 483 | FALSE), /* pcrel_offset */ |
| 484 | |
| 485 | /* The high order 16 bits of an address, plus 1 if the contents of |
| 486 | the low 16 bits, treated as a signed number, is negative. */ |
| 487 | HOWTO (R_PPC_ADDR16_HA, /* type */ |
| 488 | 16, /* rightshift */ |
| 489 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 490 | 16, /* bitsize */ |
| 491 | FALSE, /* pc_relative */ |
| 492 | 0, /* bitpos */ |
| 493 | complain_overflow_dont, /* complain_on_overflow */ |
| 494 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 495 | "R_PPC_ADDR16_HA", /* name */ |
| 496 | FALSE, /* partial_inplace */ |
| 497 | 0, /* src_mask */ |
| 498 | 0xffff, /* dst_mask */ |
| 499 | FALSE), /* pcrel_offset */ |
| 500 | |
| 501 | /* An absolute 16 bit branch; the lower two bits must be zero. |
| 502 | FIXME: we don't check that, we just clear them. */ |
| 503 | HOWTO (R_PPC_ADDR14, /* type */ |
| 504 | 0, /* rightshift */ |
| 505 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 506 | 16, /* bitsize */ |
| 507 | FALSE, /* pc_relative */ |
| 508 | 0, /* bitpos */ |
| 509 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 510 | bfd_elf_generic_reloc, /* special_function */ |
| 511 | "R_PPC_ADDR14", /* name */ |
| 512 | FALSE, /* partial_inplace */ |
| 513 | 0, /* src_mask */ |
| 514 | 0xfffc, /* dst_mask */ |
| 515 | FALSE), /* pcrel_offset */ |
| 516 | |
| 517 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 518 | indicate that the branch is expected to be taken. The lower two |
| 519 | bits must be zero. */ |
| 520 | HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */ |
| 521 | 0, /* rightshift */ |
| 522 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 523 | 16, /* bitsize */ |
| 524 | FALSE, /* pc_relative */ |
| 525 | 0, /* bitpos */ |
| 526 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 527 | bfd_elf_generic_reloc, /* special_function */ |
| 528 | "R_PPC_ADDR14_BRTAKEN",/* name */ |
| 529 | FALSE, /* partial_inplace */ |
| 530 | 0, /* src_mask */ |
| 531 | 0xfffc, /* dst_mask */ |
| 532 | FALSE), /* pcrel_offset */ |
| 533 | |
| 534 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 535 | indicate that the branch is not expected to be taken. The lower |
| 536 | two bits must be zero. */ |
| 537 | HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */ |
| 538 | 0, /* rightshift */ |
| 539 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 540 | 16, /* bitsize */ |
| 541 | FALSE, /* pc_relative */ |
| 542 | 0, /* bitpos */ |
| 543 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 544 | bfd_elf_generic_reloc, /* special_function */ |
| 545 | "R_PPC_ADDR14_BRNTAKEN",/* name */ |
| 546 | FALSE, /* partial_inplace */ |
| 547 | 0, /* src_mask */ |
| 548 | 0xfffc, /* dst_mask */ |
| 549 | FALSE), /* pcrel_offset */ |
| 550 | |
| 551 | /* A relative 26 bit branch; the lower two bits must be zero. */ |
| 552 | HOWTO (R_PPC_REL24, /* type */ |
| 553 | 0, /* rightshift */ |
| 554 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 555 | 26, /* bitsize */ |
| 556 | TRUE, /* pc_relative */ |
| 557 | 0, /* bitpos */ |
| 558 | complain_overflow_signed, /* complain_on_overflow */ |
| 559 | bfd_elf_generic_reloc, /* special_function */ |
| 560 | "R_PPC_REL24", /* name */ |
| 561 | FALSE, /* partial_inplace */ |
| 562 | 0, /* src_mask */ |
| 563 | 0x3fffffc, /* dst_mask */ |
| 564 | TRUE), /* pcrel_offset */ |
| 565 | |
| 566 | /* A relative 16 bit branch; the lower two bits must be zero. */ |
| 567 | HOWTO (R_PPC_REL14, /* type */ |
| 568 | 0, /* rightshift */ |
| 569 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 570 | 16, /* bitsize */ |
| 571 | TRUE, /* pc_relative */ |
| 572 | 0, /* bitpos */ |
| 573 | complain_overflow_signed, /* complain_on_overflow */ |
| 574 | bfd_elf_generic_reloc, /* special_function */ |
| 575 | "R_PPC_REL14", /* name */ |
| 576 | FALSE, /* partial_inplace */ |
| 577 | 0, /* src_mask */ |
| 578 | 0xfffc, /* dst_mask */ |
| 579 | TRUE), /* pcrel_offset */ |
| 580 | |
| 581 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 582 | the branch is expected to be taken. The lower two bits must be |
| 583 | zero. */ |
| 584 | HOWTO (R_PPC_REL14_BRTAKEN, /* type */ |
| 585 | 0, /* rightshift */ |
| 586 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 587 | 16, /* bitsize */ |
| 588 | TRUE, /* pc_relative */ |
| 589 | 0, /* bitpos */ |
| 590 | complain_overflow_signed, /* complain_on_overflow */ |
| 591 | bfd_elf_generic_reloc, /* special_function */ |
| 592 | "R_PPC_REL14_BRTAKEN", /* name */ |
| 593 | FALSE, /* partial_inplace */ |
| 594 | 0, /* src_mask */ |
| 595 | 0xfffc, /* dst_mask */ |
| 596 | TRUE), /* pcrel_offset */ |
| 597 | |
| 598 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 599 | the branch is not expected to be taken. The lower two bits must |
| 600 | be zero. */ |
| 601 | HOWTO (R_PPC_REL14_BRNTAKEN, /* type */ |
| 602 | 0, /* rightshift */ |
| 603 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 604 | 16, /* bitsize */ |
| 605 | TRUE, /* pc_relative */ |
| 606 | 0, /* bitpos */ |
| 607 | complain_overflow_signed, /* complain_on_overflow */ |
| 608 | bfd_elf_generic_reloc, /* special_function */ |
| 609 | "R_PPC_REL14_BRNTAKEN",/* name */ |
| 610 | FALSE, /* partial_inplace */ |
| 611 | 0, /* src_mask */ |
| 612 | 0xfffc, /* dst_mask */ |
| 613 | TRUE), /* pcrel_offset */ |
| 614 | |
| 615 | /* Like R_PPC_ADDR16, but referring to the GOT table entry for the |
| 616 | symbol. */ |
| 617 | HOWTO (R_PPC_GOT16, /* type */ |
| 618 | 0, /* rightshift */ |
| 619 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 620 | 16, /* bitsize */ |
| 621 | FALSE, /* pc_relative */ |
| 622 | 0, /* bitpos */ |
| 623 | complain_overflow_signed, /* complain_on_overflow */ |
| 624 | bfd_elf_generic_reloc, /* special_function */ |
| 625 | "R_PPC_GOT16", /* name */ |
| 626 | FALSE, /* partial_inplace */ |
| 627 | 0, /* src_mask */ |
| 628 | 0xffff, /* dst_mask */ |
| 629 | FALSE), /* pcrel_offset */ |
| 630 | |
| 631 | /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for |
| 632 | the symbol. */ |
| 633 | HOWTO (R_PPC_GOT16_LO, /* type */ |
| 634 | 0, /* rightshift */ |
| 635 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 636 | 16, /* bitsize */ |
| 637 | FALSE, /* pc_relative */ |
| 638 | 0, /* bitpos */ |
| 639 | complain_overflow_dont, /* complain_on_overflow */ |
| 640 | bfd_elf_generic_reloc, /* special_function */ |
| 641 | "R_PPC_GOT16_LO", /* name */ |
| 642 | FALSE, /* partial_inplace */ |
| 643 | 0, /* src_mask */ |
| 644 | 0xffff, /* dst_mask */ |
| 645 | FALSE), /* pcrel_offset */ |
| 646 | |
| 647 | /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for |
| 648 | the symbol. */ |
| 649 | HOWTO (R_PPC_GOT16_HI, /* type */ |
| 650 | 16, /* rightshift */ |
| 651 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 652 | 16, /* bitsize */ |
| 653 | FALSE, /* pc_relative */ |
| 654 | 0, /* bitpos */ |
| 655 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 656 | bfd_elf_generic_reloc, /* special_function */ |
| 657 | "R_PPC_GOT16_HI", /* name */ |
| 658 | FALSE, /* partial_inplace */ |
| 659 | 0, /* src_mask */ |
| 660 | 0xffff, /* dst_mask */ |
| 661 | FALSE), /* pcrel_offset */ |
| 662 | |
| 663 | /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for |
| 664 | the symbol. */ |
| 665 | HOWTO (R_PPC_GOT16_HA, /* type */ |
| 666 | 16, /* rightshift */ |
| 667 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 668 | 16, /* bitsize */ |
| 669 | FALSE, /* pc_relative */ |
| 670 | 0, /* bitpos */ |
| 671 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 672 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 673 | "R_PPC_GOT16_HA", /* name */ |
| 674 | FALSE, /* partial_inplace */ |
| 675 | 0, /* src_mask */ |
| 676 | 0xffff, /* dst_mask */ |
| 677 | FALSE), /* pcrel_offset */ |
| 678 | |
| 679 | /* Like R_PPC_REL24, but referring to the procedure linkage table |
| 680 | entry for the symbol. */ |
| 681 | HOWTO (R_PPC_PLTREL24, /* type */ |
| 682 | 0, /* rightshift */ |
| 683 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 684 | 26, /* bitsize */ |
| 685 | TRUE, /* pc_relative */ |
| 686 | 0, /* bitpos */ |
| 687 | complain_overflow_signed, /* complain_on_overflow */ |
| 688 | bfd_elf_generic_reloc, /* special_function */ |
| 689 | "R_PPC_PLTREL24", /* name */ |
| 690 | FALSE, /* partial_inplace */ |
| 691 | 0, /* src_mask */ |
| 692 | 0x3fffffc, /* dst_mask */ |
| 693 | TRUE), /* pcrel_offset */ |
| 694 | |
| 695 | /* This is used only by the dynamic linker. The symbol should exist |
| 696 | both in the object being run and in some shared library. The |
| 697 | dynamic linker copies the data addressed by the symbol from the |
| 698 | shared library into the object, because the object being |
| 699 | run has to have the data at some particular address. */ |
| 700 | HOWTO (R_PPC_COPY, /* type */ |
| 701 | 0, /* rightshift */ |
| 702 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 703 | 32, /* bitsize */ |
| 704 | FALSE, /* pc_relative */ |
| 705 | 0, /* bitpos */ |
| 706 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 707 | bfd_elf_generic_reloc, /* special_function */ |
| 708 | "R_PPC_COPY", /* name */ |
| 709 | FALSE, /* partial_inplace */ |
| 710 | 0, /* src_mask */ |
| 711 | 0, /* dst_mask */ |
| 712 | FALSE), /* pcrel_offset */ |
| 713 | |
| 714 | /* Like R_PPC_ADDR32, but used when setting global offset table |
| 715 | entries. */ |
| 716 | HOWTO (R_PPC_GLOB_DAT, /* type */ |
| 717 | 0, /* rightshift */ |
| 718 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 719 | 32, /* bitsize */ |
| 720 | FALSE, /* pc_relative */ |
| 721 | 0, /* bitpos */ |
| 722 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 723 | bfd_elf_generic_reloc, /* special_function */ |
| 724 | "R_PPC_GLOB_DAT", /* name */ |
| 725 | FALSE, /* partial_inplace */ |
| 726 | 0, /* src_mask */ |
| 727 | 0xffffffff, /* dst_mask */ |
| 728 | FALSE), /* pcrel_offset */ |
| 729 | |
| 730 | /* Marks a procedure linkage table entry for a symbol. */ |
| 731 | HOWTO (R_PPC_JMP_SLOT, /* type */ |
| 732 | 0, /* rightshift */ |
| 733 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 734 | 32, /* bitsize */ |
| 735 | FALSE, /* pc_relative */ |
| 736 | 0, /* bitpos */ |
| 737 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 738 | bfd_elf_generic_reloc, /* special_function */ |
| 739 | "R_PPC_JMP_SLOT", /* name */ |
| 740 | FALSE, /* partial_inplace */ |
| 741 | 0, /* src_mask */ |
| 742 | 0, /* dst_mask */ |
| 743 | FALSE), /* pcrel_offset */ |
| 744 | |
| 745 | /* Used only by the dynamic linker. When the object is run, this |
| 746 | longword is set to the load address of the object, plus the |
| 747 | addend. */ |
| 748 | HOWTO (R_PPC_RELATIVE, /* type */ |
| 749 | 0, /* rightshift */ |
| 750 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 751 | 32, /* bitsize */ |
| 752 | FALSE, /* pc_relative */ |
| 753 | 0, /* bitpos */ |
| 754 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 755 | bfd_elf_generic_reloc, /* special_function */ |
| 756 | "R_PPC_RELATIVE", /* name */ |
| 757 | FALSE, /* partial_inplace */ |
| 758 | 0, /* src_mask */ |
| 759 | 0xffffffff, /* dst_mask */ |
| 760 | FALSE), /* pcrel_offset */ |
| 761 | |
| 762 | /* Like R_PPC_REL24, but uses the value of the symbol within the |
| 763 | object rather than the final value. Normally used for |
| 764 | _GLOBAL_OFFSET_TABLE_. */ |
| 765 | HOWTO (R_PPC_LOCAL24PC, /* type */ |
| 766 | 0, /* rightshift */ |
| 767 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 768 | 26, /* bitsize */ |
| 769 | TRUE, /* pc_relative */ |
| 770 | 0, /* bitpos */ |
| 771 | complain_overflow_signed, /* complain_on_overflow */ |
| 772 | bfd_elf_generic_reloc, /* special_function */ |
| 773 | "R_PPC_LOCAL24PC", /* name */ |
| 774 | FALSE, /* partial_inplace */ |
| 775 | 0, /* src_mask */ |
| 776 | 0x3fffffc, /* dst_mask */ |
| 777 | TRUE), /* pcrel_offset */ |
| 778 | |
| 779 | /* Like R_PPC_ADDR32, but may be unaligned. */ |
| 780 | HOWTO (R_PPC_UADDR32, /* type */ |
| 781 | 0, /* rightshift */ |
| 782 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 783 | 32, /* bitsize */ |
| 784 | FALSE, /* pc_relative */ |
| 785 | 0, /* bitpos */ |
| 786 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 787 | bfd_elf_generic_reloc, /* special_function */ |
| 788 | "R_PPC_UADDR32", /* name */ |
| 789 | FALSE, /* partial_inplace */ |
| 790 | 0, /* src_mask */ |
| 791 | 0xffffffff, /* dst_mask */ |
| 792 | FALSE), /* pcrel_offset */ |
| 793 | |
| 794 | /* Like R_PPC_ADDR16, but may be unaligned. */ |
| 795 | HOWTO (R_PPC_UADDR16, /* type */ |
| 796 | 0, /* rightshift */ |
| 797 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 798 | 16, /* bitsize */ |
| 799 | FALSE, /* pc_relative */ |
| 800 | 0, /* bitpos */ |
| 801 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 802 | bfd_elf_generic_reloc, /* special_function */ |
| 803 | "R_PPC_UADDR16", /* name */ |
| 804 | FALSE, /* partial_inplace */ |
| 805 | 0, /* src_mask */ |
| 806 | 0xffff, /* dst_mask */ |
| 807 | FALSE), /* pcrel_offset */ |
| 808 | |
| 809 | /* 32-bit PC relative */ |
| 810 | HOWTO (R_PPC_REL32, /* type */ |
| 811 | 0, /* rightshift */ |
| 812 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 813 | 32, /* bitsize */ |
| 814 | TRUE, /* pc_relative */ |
| 815 | 0, /* bitpos */ |
| 816 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 817 | bfd_elf_generic_reloc, /* special_function */ |
| 818 | "R_PPC_REL32", /* name */ |
| 819 | FALSE, /* partial_inplace */ |
| 820 | 0, /* src_mask */ |
| 821 | 0xffffffff, /* dst_mask */ |
| 822 | TRUE), /* pcrel_offset */ |
| 823 | |
| 824 | /* 32-bit relocation to the symbol's procedure linkage table. |
| 825 | FIXME: not supported. */ |
| 826 | HOWTO (R_PPC_PLT32, /* type */ |
| 827 | 0, /* rightshift */ |
| 828 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 829 | 32, /* bitsize */ |
| 830 | FALSE, /* pc_relative */ |
| 831 | 0, /* bitpos */ |
| 832 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 833 | bfd_elf_generic_reloc, /* special_function */ |
| 834 | "R_PPC_PLT32", /* name */ |
| 835 | FALSE, /* partial_inplace */ |
| 836 | 0, /* src_mask */ |
| 837 | 0, /* dst_mask */ |
| 838 | FALSE), /* pcrel_offset */ |
| 839 | |
| 840 | /* 32-bit PC relative relocation to the symbol's procedure linkage table. |
| 841 | FIXME: not supported. */ |
| 842 | HOWTO (R_PPC_PLTREL32, /* type */ |
| 843 | 0, /* rightshift */ |
| 844 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 845 | 32, /* bitsize */ |
| 846 | TRUE, /* pc_relative */ |
| 847 | 0, /* bitpos */ |
| 848 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 849 | bfd_elf_generic_reloc, /* special_function */ |
| 850 | "R_PPC_PLTREL32", /* name */ |
| 851 | FALSE, /* partial_inplace */ |
| 852 | 0, /* src_mask */ |
| 853 | 0, /* dst_mask */ |
| 854 | TRUE), /* pcrel_offset */ |
| 855 | |
| 856 | /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for |
| 857 | the symbol. */ |
| 858 | HOWTO (R_PPC_PLT16_LO, /* type */ |
| 859 | 0, /* rightshift */ |
| 860 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 861 | 16, /* bitsize */ |
| 862 | FALSE, /* pc_relative */ |
| 863 | 0, /* bitpos */ |
| 864 | complain_overflow_dont, /* complain_on_overflow */ |
| 865 | bfd_elf_generic_reloc, /* special_function */ |
| 866 | "R_PPC_PLT16_LO", /* name */ |
| 867 | FALSE, /* partial_inplace */ |
| 868 | 0, /* src_mask */ |
| 869 | 0xffff, /* dst_mask */ |
| 870 | FALSE), /* pcrel_offset */ |
| 871 | |
| 872 | /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for |
| 873 | the symbol. */ |
| 874 | HOWTO (R_PPC_PLT16_HI, /* type */ |
| 875 | 16, /* rightshift */ |
| 876 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 877 | 16, /* bitsize */ |
| 878 | FALSE, /* pc_relative */ |
| 879 | 0, /* bitpos */ |
| 880 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 881 | bfd_elf_generic_reloc, /* special_function */ |
| 882 | "R_PPC_PLT16_HI", /* name */ |
| 883 | FALSE, /* partial_inplace */ |
| 884 | 0, /* src_mask */ |
| 885 | 0xffff, /* dst_mask */ |
| 886 | FALSE), /* pcrel_offset */ |
| 887 | |
| 888 | /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for |
| 889 | the symbol. */ |
| 890 | HOWTO (R_PPC_PLT16_HA, /* type */ |
| 891 | 16, /* rightshift */ |
| 892 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 893 | 16, /* bitsize */ |
| 894 | FALSE, /* pc_relative */ |
| 895 | 0, /* bitpos */ |
| 896 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 897 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 898 | "R_PPC_PLT16_HA", /* name */ |
| 899 | FALSE, /* partial_inplace */ |
| 900 | 0, /* src_mask */ |
| 901 | 0xffff, /* dst_mask */ |
| 902 | FALSE), /* pcrel_offset */ |
| 903 | |
| 904 | /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with |
| 905 | small data items. */ |
| 906 | HOWTO (R_PPC_SDAREL16, /* type */ |
| 907 | 0, /* rightshift */ |
| 908 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 909 | 16, /* bitsize */ |
| 910 | FALSE, /* pc_relative */ |
| 911 | 0, /* bitpos */ |
| 912 | complain_overflow_signed, /* complain_on_overflow */ |
| 913 | bfd_elf_generic_reloc, /* special_function */ |
| 914 | "R_PPC_SDAREL16", /* name */ |
| 915 | FALSE, /* partial_inplace */ |
| 916 | 0, /* src_mask */ |
| 917 | 0xffff, /* dst_mask */ |
| 918 | FALSE), /* pcrel_offset */ |
| 919 | |
| 920 | /* 16-bit section relative relocation. */ |
| 921 | HOWTO (R_PPC_SECTOFF, /* type */ |
| 922 | 0, /* rightshift */ |
| 923 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 924 | 16, /* bitsize */ |
| 925 | FALSE, /* pc_relative */ |
| 926 | 0, /* bitpos */ |
| 927 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 928 | bfd_elf_generic_reloc, /* special_function */ |
| 929 | "R_PPC_SECTOFF", /* name */ |
| 930 | FALSE, /* partial_inplace */ |
| 931 | 0, /* src_mask */ |
| 932 | 0xffff, /* dst_mask */ |
| 933 | FALSE), /* pcrel_offset */ |
| 934 | |
| 935 | /* 16-bit lower half section relative relocation. */ |
| 936 | HOWTO (R_PPC_SECTOFF_LO, /* type */ |
| 937 | 0, /* rightshift */ |
| 938 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 939 | 16, /* bitsize */ |
| 940 | FALSE, /* pc_relative */ |
| 941 | 0, /* bitpos */ |
| 942 | complain_overflow_dont, /* complain_on_overflow */ |
| 943 | bfd_elf_generic_reloc, /* special_function */ |
| 944 | "R_PPC_SECTOFF_LO", /* name */ |
| 945 | FALSE, /* partial_inplace */ |
| 946 | 0, /* src_mask */ |
| 947 | 0xffff, /* dst_mask */ |
| 948 | FALSE), /* pcrel_offset */ |
| 949 | |
| 950 | /* 16-bit upper half section relative relocation. */ |
| 951 | HOWTO (R_PPC_SECTOFF_HI, /* type */ |
| 952 | 16, /* rightshift */ |
| 953 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 954 | 16, /* bitsize */ |
| 955 | FALSE, /* pc_relative */ |
| 956 | 0, /* bitpos */ |
| 957 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 958 | bfd_elf_generic_reloc, /* special_function */ |
| 959 | "R_PPC_SECTOFF_HI", /* name */ |
| 960 | FALSE, /* partial_inplace */ |
| 961 | 0, /* src_mask */ |
| 962 | 0xffff, /* dst_mask */ |
| 963 | FALSE), /* pcrel_offset */ |
| 964 | |
| 965 | /* 16-bit upper half adjusted section relative relocation. */ |
| 966 | HOWTO (R_PPC_SECTOFF_HA, /* type */ |
| 967 | 16, /* rightshift */ |
| 968 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 969 | 16, /* bitsize */ |
| 970 | FALSE, /* pc_relative */ |
| 971 | 0, /* bitpos */ |
| 972 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 973 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 974 | "R_PPC_SECTOFF_HA", /* name */ |
| 975 | FALSE, /* partial_inplace */ |
| 976 | 0, /* src_mask */ |
| 977 | 0xffff, /* dst_mask */ |
| 978 | FALSE), /* pcrel_offset */ |
| 979 | |
| 980 | /* Marker reloc for TLS. */ |
| 981 | HOWTO (R_PPC_TLS, |
| 982 | 0, /* rightshift */ |
| 983 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 984 | 32, /* bitsize */ |
| 985 | FALSE, /* pc_relative */ |
| 986 | 0, /* bitpos */ |
| 987 | complain_overflow_dont, /* complain_on_overflow */ |
| 988 | bfd_elf_generic_reloc, /* special_function */ |
| 989 | "R_PPC_TLS", /* name */ |
| 990 | FALSE, /* partial_inplace */ |
| 991 | 0, /* src_mask */ |
| 992 | 0, /* dst_mask */ |
| 993 | FALSE), /* pcrel_offset */ |
| 994 | |
| 995 | /* Computes the load module index of the load module that contains the |
| 996 | definition of its TLS sym. */ |
| 997 | HOWTO (R_PPC_DTPMOD32, |
| 998 | 0, /* rightshift */ |
| 999 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1000 | 32, /* bitsize */ |
| 1001 | FALSE, /* pc_relative */ |
| 1002 | 0, /* bitpos */ |
| 1003 | complain_overflow_dont, /* complain_on_overflow */ |
| 1004 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1005 | "R_PPC_DTPMOD32", /* name */ |
| 1006 | FALSE, /* partial_inplace */ |
| 1007 | 0, /* src_mask */ |
| 1008 | 0xffffffff, /* dst_mask */ |
| 1009 | FALSE), /* pcrel_offset */ |
| 1010 | |
| 1011 | /* Computes a dtv-relative displacement, the difference between the value |
| 1012 | of sym+add and the base address of the thread-local storage block that |
| 1013 | contains the definition of sym, minus 0x8000. */ |
| 1014 | HOWTO (R_PPC_DTPREL32, |
| 1015 | 0, /* rightshift */ |
| 1016 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1017 | 32, /* bitsize */ |
| 1018 | FALSE, /* pc_relative */ |
| 1019 | 0, /* bitpos */ |
| 1020 | complain_overflow_dont, /* complain_on_overflow */ |
| 1021 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1022 | "R_PPC_DTPREL32", /* name */ |
| 1023 | FALSE, /* partial_inplace */ |
| 1024 | 0, /* src_mask */ |
| 1025 | 0xffffffff, /* dst_mask */ |
| 1026 | FALSE), /* pcrel_offset */ |
| 1027 | |
| 1028 | /* A 16 bit dtprel reloc. */ |
| 1029 | HOWTO (R_PPC_DTPREL16, |
| 1030 | 0, /* rightshift */ |
| 1031 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1032 | 16, /* bitsize */ |
| 1033 | FALSE, /* pc_relative */ |
| 1034 | 0, /* bitpos */ |
| 1035 | complain_overflow_signed, /* complain_on_overflow */ |
| 1036 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1037 | "R_PPC_DTPREL16", /* name */ |
| 1038 | FALSE, /* partial_inplace */ |
| 1039 | 0, /* src_mask */ |
| 1040 | 0xffff, /* dst_mask */ |
| 1041 | FALSE), /* pcrel_offset */ |
| 1042 | |
| 1043 | /* Like DTPREL16, but no overflow. */ |
| 1044 | HOWTO (R_PPC_DTPREL16_LO, |
| 1045 | 0, /* rightshift */ |
| 1046 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1047 | 16, /* bitsize */ |
| 1048 | FALSE, /* pc_relative */ |
| 1049 | 0, /* bitpos */ |
| 1050 | complain_overflow_dont, /* complain_on_overflow */ |
| 1051 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1052 | "R_PPC_DTPREL16_LO", /* name */ |
| 1053 | FALSE, /* partial_inplace */ |
| 1054 | 0, /* src_mask */ |
| 1055 | 0xffff, /* dst_mask */ |
| 1056 | FALSE), /* pcrel_offset */ |
| 1057 | |
| 1058 | /* Like DTPREL16_LO, but next higher group of 16 bits. */ |
| 1059 | HOWTO (R_PPC_DTPREL16_HI, |
| 1060 | 16, /* rightshift */ |
| 1061 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1062 | 16, /* bitsize */ |
| 1063 | FALSE, /* pc_relative */ |
| 1064 | 0, /* bitpos */ |
| 1065 | complain_overflow_dont, /* complain_on_overflow */ |
| 1066 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1067 | "R_PPC_DTPREL16_HI", /* name */ |
| 1068 | FALSE, /* partial_inplace */ |
| 1069 | 0, /* src_mask */ |
| 1070 | 0xffff, /* dst_mask */ |
| 1071 | FALSE), /* pcrel_offset */ |
| 1072 | |
| 1073 | /* Like DTPREL16_HI, but adjust for low 16 bits. */ |
| 1074 | HOWTO (R_PPC_DTPREL16_HA, |
| 1075 | 16, /* rightshift */ |
| 1076 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1077 | 16, /* bitsize */ |
| 1078 | FALSE, /* pc_relative */ |
| 1079 | 0, /* bitpos */ |
| 1080 | complain_overflow_dont, /* complain_on_overflow */ |
| 1081 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1082 | "R_PPC_DTPREL16_HA", /* name */ |
| 1083 | FALSE, /* partial_inplace */ |
| 1084 | 0, /* src_mask */ |
| 1085 | 0xffff, /* dst_mask */ |
| 1086 | FALSE), /* pcrel_offset */ |
| 1087 | |
| 1088 | /* Computes a tp-relative displacement, the difference between the value of |
| 1089 | sym+add and the value of the thread pointer (r13). */ |
| 1090 | HOWTO (R_PPC_TPREL32, |
| 1091 | 0, /* rightshift */ |
| 1092 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1093 | 32, /* bitsize */ |
| 1094 | FALSE, /* pc_relative */ |
| 1095 | 0, /* bitpos */ |
| 1096 | complain_overflow_dont, /* complain_on_overflow */ |
| 1097 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1098 | "R_PPC_TPREL32", /* name */ |
| 1099 | FALSE, /* partial_inplace */ |
| 1100 | 0, /* src_mask */ |
| 1101 | 0xffffffff, /* dst_mask */ |
| 1102 | FALSE), /* pcrel_offset */ |
| 1103 | |
| 1104 | /* A 16 bit tprel reloc. */ |
| 1105 | HOWTO (R_PPC_TPREL16, |
| 1106 | 0, /* rightshift */ |
| 1107 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1108 | 16, /* bitsize */ |
| 1109 | FALSE, /* pc_relative */ |
| 1110 | 0, /* bitpos */ |
| 1111 | complain_overflow_signed, /* complain_on_overflow */ |
| 1112 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1113 | "R_PPC_TPREL16", /* name */ |
| 1114 | FALSE, /* partial_inplace */ |
| 1115 | 0, /* src_mask */ |
| 1116 | 0xffff, /* dst_mask */ |
| 1117 | FALSE), /* pcrel_offset */ |
| 1118 | |
| 1119 | /* Like TPREL16, but no overflow. */ |
| 1120 | HOWTO (R_PPC_TPREL16_LO, |
| 1121 | 0, /* rightshift */ |
| 1122 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1123 | 16, /* bitsize */ |
| 1124 | FALSE, /* pc_relative */ |
| 1125 | 0, /* bitpos */ |
| 1126 | complain_overflow_dont, /* complain_on_overflow */ |
| 1127 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1128 | "R_PPC_TPREL16_LO", /* name */ |
| 1129 | FALSE, /* partial_inplace */ |
| 1130 | 0, /* src_mask */ |
| 1131 | 0xffff, /* dst_mask */ |
| 1132 | FALSE), /* pcrel_offset */ |
| 1133 | |
| 1134 | /* Like TPREL16_LO, but next higher group of 16 bits. */ |
| 1135 | HOWTO (R_PPC_TPREL16_HI, |
| 1136 | 16, /* rightshift */ |
| 1137 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1138 | 16, /* bitsize */ |
| 1139 | FALSE, /* pc_relative */ |
| 1140 | 0, /* bitpos */ |
| 1141 | complain_overflow_dont, /* complain_on_overflow */ |
| 1142 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1143 | "R_PPC_TPREL16_HI", /* name */ |
| 1144 | FALSE, /* partial_inplace */ |
| 1145 | 0, /* src_mask */ |
| 1146 | 0xffff, /* dst_mask */ |
| 1147 | FALSE), /* pcrel_offset */ |
| 1148 | |
| 1149 | /* Like TPREL16_HI, but adjust for low 16 bits. */ |
| 1150 | HOWTO (R_PPC_TPREL16_HA, |
| 1151 | 16, /* rightshift */ |
| 1152 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1153 | 16, /* bitsize */ |
| 1154 | FALSE, /* pc_relative */ |
| 1155 | 0, /* bitpos */ |
| 1156 | complain_overflow_dont, /* complain_on_overflow */ |
| 1157 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1158 | "R_PPC_TPREL16_HA", /* name */ |
| 1159 | FALSE, /* partial_inplace */ |
| 1160 | 0, /* src_mask */ |
| 1161 | 0xffff, /* dst_mask */ |
| 1162 | FALSE), /* pcrel_offset */ |
| 1163 | |
| 1164 | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
| 1165 | with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset |
| 1166 | to the first entry. */ |
| 1167 | HOWTO (R_PPC_GOT_TLSGD16, |
| 1168 | 0, /* rightshift */ |
| 1169 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1170 | 16, /* bitsize */ |
| 1171 | FALSE, /* pc_relative */ |
| 1172 | 0, /* bitpos */ |
| 1173 | complain_overflow_signed, /* complain_on_overflow */ |
| 1174 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1175 | "R_PPC_GOT_TLSGD16", /* name */ |
| 1176 | FALSE, /* partial_inplace */ |
| 1177 | 0, /* src_mask */ |
| 1178 | 0xffff, /* dst_mask */ |
| 1179 | FALSE), /* pcrel_offset */ |
| 1180 | |
| 1181 | /* Like GOT_TLSGD16, but no overflow. */ |
| 1182 | HOWTO (R_PPC_GOT_TLSGD16_LO, |
| 1183 | 0, /* rightshift */ |
| 1184 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1185 | 16, /* bitsize */ |
| 1186 | FALSE, /* pc_relative */ |
| 1187 | 0, /* bitpos */ |
| 1188 | complain_overflow_dont, /* complain_on_overflow */ |
| 1189 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1190 | "R_PPC_GOT_TLSGD16_LO", /* name */ |
| 1191 | FALSE, /* partial_inplace */ |
| 1192 | 0, /* src_mask */ |
| 1193 | 0xffff, /* dst_mask */ |
| 1194 | FALSE), /* pcrel_offset */ |
| 1195 | |
| 1196 | /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ |
| 1197 | HOWTO (R_PPC_GOT_TLSGD16_HI, |
| 1198 | 16, /* rightshift */ |
| 1199 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1200 | 16, /* bitsize */ |
| 1201 | FALSE, /* pc_relative */ |
| 1202 | 0, /* bitpos */ |
| 1203 | complain_overflow_dont, /* complain_on_overflow */ |
| 1204 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1205 | "R_PPC_GOT_TLSGD16_HI", /* name */ |
| 1206 | FALSE, /* partial_inplace */ |
| 1207 | 0, /* src_mask */ |
| 1208 | 0xffff, /* dst_mask */ |
| 1209 | FALSE), /* pcrel_offset */ |
| 1210 | |
| 1211 | /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ |
| 1212 | HOWTO (R_PPC_GOT_TLSGD16_HA, |
| 1213 | 16, /* rightshift */ |
| 1214 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1215 | 16, /* bitsize */ |
| 1216 | FALSE, /* pc_relative */ |
| 1217 | 0, /* bitpos */ |
| 1218 | complain_overflow_dont, /* complain_on_overflow */ |
| 1219 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1220 | "R_PPC_GOT_TLSGD16_HA", /* name */ |
| 1221 | FALSE, /* partial_inplace */ |
| 1222 | 0, /* src_mask */ |
| 1223 | 0xffff, /* dst_mask */ |
| 1224 | FALSE), /* pcrel_offset */ |
| 1225 | |
| 1226 | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
| 1227 | with values (sym+add)@dtpmod and zero, and computes the offset to the |
| 1228 | first entry. */ |
| 1229 | HOWTO (R_PPC_GOT_TLSLD16, |
| 1230 | 0, /* rightshift */ |
| 1231 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1232 | 16, /* bitsize */ |
| 1233 | FALSE, /* pc_relative */ |
| 1234 | 0, /* bitpos */ |
| 1235 | complain_overflow_signed, /* complain_on_overflow */ |
| 1236 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1237 | "R_PPC_GOT_TLSLD16", /* name */ |
| 1238 | FALSE, /* partial_inplace */ |
| 1239 | 0, /* src_mask */ |
| 1240 | 0xffff, /* dst_mask */ |
| 1241 | FALSE), /* pcrel_offset */ |
| 1242 | |
| 1243 | /* Like GOT_TLSLD16, but no overflow. */ |
| 1244 | HOWTO (R_PPC_GOT_TLSLD16_LO, |
| 1245 | 0, /* rightshift */ |
| 1246 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1247 | 16, /* bitsize */ |
| 1248 | FALSE, /* pc_relative */ |
| 1249 | 0, /* bitpos */ |
| 1250 | complain_overflow_dont, /* complain_on_overflow */ |
| 1251 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1252 | "R_PPC_GOT_TLSLD16_LO", /* name */ |
| 1253 | FALSE, /* partial_inplace */ |
| 1254 | 0, /* src_mask */ |
| 1255 | 0xffff, /* dst_mask */ |
| 1256 | FALSE), /* pcrel_offset */ |
| 1257 | |
| 1258 | /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ |
| 1259 | HOWTO (R_PPC_GOT_TLSLD16_HI, |
| 1260 | 16, /* rightshift */ |
| 1261 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1262 | 16, /* bitsize */ |
| 1263 | FALSE, /* pc_relative */ |
| 1264 | 0, /* bitpos */ |
| 1265 | complain_overflow_dont, /* complain_on_overflow */ |
| 1266 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1267 | "R_PPC_GOT_TLSLD16_HI", /* name */ |
| 1268 | FALSE, /* partial_inplace */ |
| 1269 | 0, /* src_mask */ |
| 1270 | 0xffff, /* dst_mask */ |
| 1271 | FALSE), /* pcrel_offset */ |
| 1272 | |
| 1273 | /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ |
| 1274 | HOWTO (R_PPC_GOT_TLSLD16_HA, |
| 1275 | 16, /* rightshift */ |
| 1276 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1277 | 16, /* bitsize */ |
| 1278 | FALSE, /* pc_relative */ |
| 1279 | 0, /* bitpos */ |
| 1280 | complain_overflow_dont, /* complain_on_overflow */ |
| 1281 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1282 | "R_PPC_GOT_TLSLD16_HA", /* name */ |
| 1283 | FALSE, /* partial_inplace */ |
| 1284 | 0, /* src_mask */ |
| 1285 | 0xffff, /* dst_mask */ |
| 1286 | FALSE), /* pcrel_offset */ |
| 1287 | |
| 1288 | /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes |
| 1289 | the offset to the entry. */ |
| 1290 | HOWTO (R_PPC_GOT_DTPREL16, |
| 1291 | 0, /* rightshift */ |
| 1292 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1293 | 16, /* bitsize */ |
| 1294 | FALSE, /* pc_relative */ |
| 1295 | 0, /* bitpos */ |
| 1296 | complain_overflow_signed, /* complain_on_overflow */ |
| 1297 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1298 | "R_PPC_GOT_DTPREL16", /* name */ |
| 1299 | FALSE, /* partial_inplace */ |
| 1300 | 0, /* src_mask */ |
| 1301 | 0xffff, /* dst_mask */ |
| 1302 | FALSE), /* pcrel_offset */ |
| 1303 | |
| 1304 | /* Like GOT_DTPREL16, but no overflow. */ |
| 1305 | HOWTO (R_PPC_GOT_DTPREL16_LO, |
| 1306 | 0, /* rightshift */ |
| 1307 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1308 | 16, /* bitsize */ |
| 1309 | FALSE, /* pc_relative */ |
| 1310 | 0, /* bitpos */ |
| 1311 | complain_overflow_dont, /* complain_on_overflow */ |
| 1312 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1313 | "R_PPC_GOT_DTPREL16_LO", /* name */ |
| 1314 | FALSE, /* partial_inplace */ |
| 1315 | 0, /* src_mask */ |
| 1316 | 0xffff, /* dst_mask */ |
| 1317 | FALSE), /* pcrel_offset */ |
| 1318 | |
| 1319 | /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */ |
| 1320 | HOWTO (R_PPC_GOT_DTPREL16_HI, |
| 1321 | 16, /* rightshift */ |
| 1322 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1323 | 16, /* bitsize */ |
| 1324 | FALSE, /* pc_relative */ |
| 1325 | 0, /* bitpos */ |
| 1326 | complain_overflow_dont, /* complain_on_overflow */ |
| 1327 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1328 | "R_PPC_GOT_DTPREL16_HI", /* name */ |
| 1329 | FALSE, /* partial_inplace */ |
| 1330 | 0, /* src_mask */ |
| 1331 | 0xffff, /* dst_mask */ |
| 1332 | FALSE), /* pcrel_offset */ |
| 1333 | |
| 1334 | /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ |
| 1335 | HOWTO (R_PPC_GOT_DTPREL16_HA, |
| 1336 | 16, /* rightshift */ |
| 1337 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1338 | 16, /* bitsize */ |
| 1339 | FALSE, /* pc_relative */ |
| 1340 | 0, /* bitpos */ |
| 1341 | complain_overflow_dont, /* complain_on_overflow */ |
| 1342 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1343 | "R_PPC_GOT_DTPREL16_HA", /* name */ |
| 1344 | FALSE, /* partial_inplace */ |
| 1345 | 0, /* src_mask */ |
| 1346 | 0xffff, /* dst_mask */ |
| 1347 | FALSE), /* pcrel_offset */ |
| 1348 | |
| 1349 | /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the |
| 1350 | offset to the entry. */ |
| 1351 | HOWTO (R_PPC_GOT_TPREL16, |
| 1352 | 0, /* rightshift */ |
| 1353 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1354 | 16, /* bitsize */ |
| 1355 | FALSE, /* pc_relative */ |
| 1356 | 0, /* bitpos */ |
| 1357 | complain_overflow_signed, /* complain_on_overflow */ |
| 1358 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1359 | "R_PPC_GOT_TPREL16", /* name */ |
| 1360 | FALSE, /* partial_inplace */ |
| 1361 | 0, /* src_mask */ |
| 1362 | 0xffff, /* dst_mask */ |
| 1363 | FALSE), /* pcrel_offset */ |
| 1364 | |
| 1365 | /* Like GOT_TPREL16, but no overflow. */ |
| 1366 | HOWTO (R_PPC_GOT_TPREL16_LO, |
| 1367 | 0, /* rightshift */ |
| 1368 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1369 | 16, /* bitsize */ |
| 1370 | FALSE, /* pc_relative */ |
| 1371 | 0, /* bitpos */ |
| 1372 | complain_overflow_dont, /* complain_on_overflow */ |
| 1373 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1374 | "R_PPC_GOT_TPREL16_LO", /* name */ |
| 1375 | FALSE, /* partial_inplace */ |
| 1376 | 0, /* src_mask */ |
| 1377 | 0xffff, /* dst_mask */ |
| 1378 | FALSE), /* pcrel_offset */ |
| 1379 | |
| 1380 | /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */ |
| 1381 | HOWTO (R_PPC_GOT_TPREL16_HI, |
| 1382 | 16, /* rightshift */ |
| 1383 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1384 | 16, /* bitsize */ |
| 1385 | FALSE, /* pc_relative */ |
| 1386 | 0, /* bitpos */ |
| 1387 | complain_overflow_dont, /* complain_on_overflow */ |
| 1388 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1389 | "R_PPC_GOT_TPREL16_HI", /* name */ |
| 1390 | FALSE, /* partial_inplace */ |
| 1391 | 0, /* src_mask */ |
| 1392 | 0xffff, /* dst_mask */ |
| 1393 | FALSE), /* pcrel_offset */ |
| 1394 | |
| 1395 | /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ |
| 1396 | HOWTO (R_PPC_GOT_TPREL16_HA, |
| 1397 | 16, /* rightshift */ |
| 1398 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1399 | 16, /* bitsize */ |
| 1400 | FALSE, /* pc_relative */ |
| 1401 | 0, /* bitpos */ |
| 1402 | complain_overflow_dont, /* complain_on_overflow */ |
| 1403 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1404 | "R_PPC_GOT_TPREL16_HA", /* name */ |
| 1405 | FALSE, /* partial_inplace */ |
| 1406 | 0, /* src_mask */ |
| 1407 | 0xffff, /* dst_mask */ |
| 1408 | FALSE), /* pcrel_offset */ |
| 1409 | |
| 1410 | /* The remaining relocs are from the Embedded ELF ABI, and are not |
| 1411 | in the SVR4 ELF ABI. */ |
| 1412 | |
| 1413 | /* 32 bit value resulting from the addend minus the symbol. */ |
| 1414 | HOWTO (R_PPC_EMB_NADDR32, /* type */ |
| 1415 | 0, /* rightshift */ |
| 1416 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1417 | 32, /* bitsize */ |
| 1418 | FALSE, /* pc_relative */ |
| 1419 | 0, /* bitpos */ |
| 1420 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1421 | bfd_elf_generic_reloc, /* special_function */ |
| 1422 | "R_PPC_EMB_NADDR32", /* name */ |
| 1423 | FALSE, /* partial_inplace */ |
| 1424 | 0, /* src_mask */ |
| 1425 | 0xffffffff, /* dst_mask */ |
| 1426 | FALSE), /* pcrel_offset */ |
| 1427 | |
| 1428 | /* 16 bit value resulting from the addend minus the symbol. */ |
| 1429 | HOWTO (R_PPC_EMB_NADDR16, /* type */ |
| 1430 | 0, /* rightshift */ |
| 1431 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1432 | 16, /* bitsize */ |
| 1433 | FALSE, /* pc_relative */ |
| 1434 | 0, /* bitpos */ |
| 1435 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1436 | bfd_elf_generic_reloc, /* special_function */ |
| 1437 | "R_PPC_EMB_NADDR16", /* name */ |
| 1438 | FALSE, /* partial_inplace */ |
| 1439 | 0, /* src_mask */ |
| 1440 | 0xffff, /* dst_mask */ |
| 1441 | FALSE), /* pcrel_offset */ |
| 1442 | |
| 1443 | /* 16 bit value resulting from the addend minus the symbol. */ |
| 1444 | HOWTO (R_PPC_EMB_NADDR16_LO, /* type */ |
| 1445 | 0, /* rightshift */ |
| 1446 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1447 | 16, /* bitsize */ |
| 1448 | FALSE, /* pc_relative */ |
| 1449 | 0, /* bitpos */ |
| 1450 | complain_overflow_dont,/* complain_on_overflow */ |
| 1451 | bfd_elf_generic_reloc, /* special_function */ |
| 1452 | "R_PPC_EMB_ADDR16_LO", /* name */ |
| 1453 | FALSE, /* partial_inplace */ |
| 1454 | 0, /* src_mask */ |
| 1455 | 0xffff, /* dst_mask */ |
| 1456 | FALSE), /* pcrel_offset */ |
| 1457 | |
| 1458 | /* The high order 16 bits of the addend minus the symbol. */ |
| 1459 | HOWTO (R_PPC_EMB_NADDR16_HI, /* type */ |
| 1460 | 16, /* rightshift */ |
| 1461 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1462 | 16, /* bitsize */ |
| 1463 | FALSE, /* pc_relative */ |
| 1464 | 0, /* bitpos */ |
| 1465 | complain_overflow_dont, /* complain_on_overflow */ |
| 1466 | bfd_elf_generic_reloc, /* special_function */ |
| 1467 | "R_PPC_EMB_NADDR16_HI", /* name */ |
| 1468 | FALSE, /* partial_inplace */ |
| 1469 | 0, /* src_mask */ |
| 1470 | 0xffff, /* dst_mask */ |
| 1471 | FALSE), /* pcrel_offset */ |
| 1472 | |
| 1473 | /* The high order 16 bits of the result of the addend minus the address, |
| 1474 | plus 1 if the contents of the low 16 bits, treated as a signed number, |
| 1475 | is negative. */ |
| 1476 | HOWTO (R_PPC_EMB_NADDR16_HA, /* type */ |
| 1477 | 16, /* rightshift */ |
| 1478 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1479 | 16, /* bitsize */ |
| 1480 | FALSE, /* pc_relative */ |
| 1481 | 0, /* bitpos */ |
| 1482 | complain_overflow_dont, /* complain_on_overflow */ |
| 1483 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 1484 | "R_PPC_EMB_NADDR16_HA", /* name */ |
| 1485 | FALSE, /* partial_inplace */ |
| 1486 | 0, /* src_mask */ |
| 1487 | 0xffff, /* dst_mask */ |
| 1488 | FALSE), /* pcrel_offset */ |
| 1489 | |
| 1490 | /* 16 bit value resulting from allocating a 4 byte word to hold an |
| 1491 | address in the .sdata section, and returning the offset from |
| 1492 | _SDA_BASE_ for that relocation. */ |
| 1493 | HOWTO (R_PPC_EMB_SDAI16, /* type */ |
| 1494 | 0, /* rightshift */ |
| 1495 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1496 | 16, /* bitsize */ |
| 1497 | FALSE, /* pc_relative */ |
| 1498 | 0, /* bitpos */ |
| 1499 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1500 | bfd_elf_generic_reloc, /* special_function */ |
| 1501 | "R_PPC_EMB_SDAI16", /* name */ |
| 1502 | FALSE, /* partial_inplace */ |
| 1503 | 0, /* src_mask */ |
| 1504 | 0xffff, /* dst_mask */ |
| 1505 | FALSE), /* pcrel_offset */ |
| 1506 | |
| 1507 | /* 16 bit value resulting from allocating a 4 byte word to hold an |
| 1508 | address in the .sdata2 section, and returning the offset from |
| 1509 | _SDA2_BASE_ for that relocation. */ |
| 1510 | HOWTO (R_PPC_EMB_SDA2I16, /* type */ |
| 1511 | 0, /* rightshift */ |
| 1512 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1513 | 16, /* bitsize */ |
| 1514 | FALSE, /* pc_relative */ |
| 1515 | 0, /* bitpos */ |
| 1516 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1517 | bfd_elf_generic_reloc, /* special_function */ |
| 1518 | "R_PPC_EMB_SDA2I16", /* name */ |
| 1519 | FALSE, /* partial_inplace */ |
| 1520 | 0, /* src_mask */ |
| 1521 | 0xffff, /* dst_mask */ |
| 1522 | FALSE), /* pcrel_offset */ |
| 1523 | |
| 1524 | /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with |
| 1525 | small data items. */ |
| 1526 | HOWTO (R_PPC_EMB_SDA2REL, /* type */ |
| 1527 | 0, /* rightshift */ |
| 1528 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1529 | 16, /* bitsize */ |
| 1530 | FALSE, /* pc_relative */ |
| 1531 | 0, /* bitpos */ |
| 1532 | complain_overflow_signed, /* complain_on_overflow */ |
| 1533 | bfd_elf_generic_reloc, /* special_function */ |
| 1534 | "R_PPC_EMB_SDA2REL", /* name */ |
| 1535 | FALSE, /* partial_inplace */ |
| 1536 | 0, /* src_mask */ |
| 1537 | 0xffff, /* dst_mask */ |
| 1538 | FALSE), /* pcrel_offset */ |
| 1539 | |
| 1540 | /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit |
| 1541 | signed offset from the appropriate base, and filling in the register |
| 1542 | field with the appropriate register (0, 2, or 13). */ |
| 1543 | HOWTO (R_PPC_EMB_SDA21, /* type */ |
| 1544 | 0, /* rightshift */ |
| 1545 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1546 | 16, /* bitsize */ |
| 1547 | FALSE, /* pc_relative */ |
| 1548 | 0, /* bitpos */ |
| 1549 | complain_overflow_signed, /* complain_on_overflow */ |
| 1550 | bfd_elf_generic_reloc, /* special_function */ |
| 1551 | "R_PPC_EMB_SDA21", /* name */ |
| 1552 | FALSE, /* partial_inplace */ |
| 1553 | 0, /* src_mask */ |
| 1554 | 0xffff, /* dst_mask */ |
| 1555 | FALSE), /* pcrel_offset */ |
| 1556 | |
| 1557 | /* Relocation not handled: R_PPC_EMB_MRKREF */ |
| 1558 | /* Relocation not handled: R_PPC_EMB_RELSEC16 */ |
| 1559 | /* Relocation not handled: R_PPC_EMB_RELST_LO */ |
| 1560 | /* Relocation not handled: R_PPC_EMB_RELST_HI */ |
| 1561 | /* Relocation not handled: R_PPC_EMB_RELST_HA */ |
| 1562 | /* Relocation not handled: R_PPC_EMB_BIT_FLD */ |
| 1563 | |
| 1564 | /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling |
| 1565 | in the 16 bit signed offset from the appropriate base, and filling in the |
| 1566 | register field with the appropriate register (0, 2, or 13). */ |
| 1567 | HOWTO (R_PPC_EMB_RELSDA, /* type */ |
| 1568 | 0, /* rightshift */ |
| 1569 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1570 | 16, /* bitsize */ |
| 1571 | TRUE, /* pc_relative */ |
| 1572 | 0, /* bitpos */ |
| 1573 | complain_overflow_signed, /* complain_on_overflow */ |
| 1574 | bfd_elf_generic_reloc, /* special_function */ |
| 1575 | "R_PPC_EMB_RELSDA", /* name */ |
| 1576 | FALSE, /* partial_inplace */ |
| 1577 | 0, /* src_mask */ |
| 1578 | 0xffff, /* dst_mask */ |
| 1579 | FALSE), /* pcrel_offset */ |
| 1580 | |
| 1581 | /* GNU extension to record C++ vtable hierarchy. */ |
| 1582 | HOWTO (R_PPC_GNU_VTINHERIT, /* type */ |
| 1583 | 0, /* rightshift */ |
| 1584 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1585 | 0, /* bitsize */ |
| 1586 | FALSE, /* pc_relative */ |
| 1587 | 0, /* bitpos */ |
| 1588 | complain_overflow_dont, /* complain_on_overflow */ |
| 1589 | NULL, /* special_function */ |
| 1590 | "R_PPC_GNU_VTINHERIT", /* name */ |
| 1591 | FALSE, /* partial_inplace */ |
| 1592 | 0, /* src_mask */ |
| 1593 | 0, /* dst_mask */ |
| 1594 | FALSE), /* pcrel_offset */ |
| 1595 | |
| 1596 | /* GNU extension to record C++ vtable member usage. */ |
| 1597 | HOWTO (R_PPC_GNU_VTENTRY, /* type */ |
| 1598 | 0, /* rightshift */ |
| 1599 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1600 | 0, /* bitsize */ |
| 1601 | FALSE, /* pc_relative */ |
| 1602 | 0, /* bitpos */ |
| 1603 | complain_overflow_dont, /* complain_on_overflow */ |
| 1604 | NULL, /* special_function */ |
| 1605 | "R_PPC_GNU_VTENTRY", /* name */ |
| 1606 | FALSE, /* partial_inplace */ |
| 1607 | 0, /* src_mask */ |
| 1608 | 0, /* dst_mask */ |
| 1609 | FALSE), /* pcrel_offset */ |
| 1610 | |
| 1611 | /* Phony reloc to handle AIX style TOC entries. */ |
| 1612 | HOWTO (R_PPC_TOC16, /* type */ |
| 1613 | 0, /* rightshift */ |
| 1614 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1615 | 16, /* bitsize */ |
| 1616 | FALSE, /* pc_relative */ |
| 1617 | 0, /* bitpos */ |
| 1618 | complain_overflow_signed, /* complain_on_overflow */ |
| 1619 | bfd_elf_generic_reloc, /* special_function */ |
| 1620 | "R_PPC_TOC16", /* name */ |
| 1621 | FALSE, /* partial_inplace */ |
| 1622 | 0, /* src_mask */ |
| 1623 | 0xffff, /* dst_mask */ |
| 1624 | FALSE), /* pcrel_offset */ |
| 1625 | }; |
| 1626 | \f |
| 1627 | /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ |
| 1628 | |
| 1629 | static void |
| 1630 | ppc_elf_howto_init () |
| 1631 | { |
| 1632 | unsigned int i, type; |
| 1633 | |
| 1634 | for (i = 0; |
| 1635 | i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); |
| 1636 | i++) |
| 1637 | { |
| 1638 | type = ppc_elf_howto_raw[i].type; |
| 1639 | if (type >= (sizeof (ppc_elf_howto_table) |
| 1640 | / sizeof (ppc_elf_howto_table[0]))) |
| 1641 | abort (); |
| 1642 | ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; |
| 1643 | } |
| 1644 | } |
| 1645 | \f |
| 1646 | /* This function handles relaxing for the PPC with option --mpc860c0[=<n>]. |
| 1647 | |
| 1648 | The MPC860, revision C0 or earlier contains a bug in the die. |
| 1649 | If all of the following conditions are true, the next instruction |
| 1650 | to be executed *may* be treated as a no-op. |
| 1651 | 1/ A forward branch is executed. |
| 1652 | 2/ The branch is predicted as not taken. |
| 1653 | 3/ The branch is taken. |
| 1654 | 4/ The branch is located in the last 5 words of a page. |
| 1655 | (The EOP limit is 5 by default but may be specified as any value |
| 1656 | from 1-10.) |
| 1657 | |
| 1658 | Our software solution is to detect these problematic branches in a |
| 1659 | linker pass and modify them as follows: |
| 1660 | 1/ Unconditional branches - Since these are always predicted taken, |
| 1661 | there is no problem and no action is required. |
| 1662 | 2/ Conditional backward branches - No problem, no action required. |
| 1663 | 3/ Conditional forward branches - Ensure that the "inverse prediction |
| 1664 | bit" is set (ensure it is predicted taken). |
| 1665 | 4/ Conditional register branches - Ensure that the "y bit" is set |
| 1666 | (ensure it is predicted taken). */ |
| 1667 | |
| 1668 | /* Sort sections by address. */ |
| 1669 | |
| 1670 | static int |
| 1671 | ppc_elf_sort_rela (arg1, arg2) |
| 1672 | const PTR arg1; |
| 1673 | const PTR arg2; |
| 1674 | { |
| 1675 | const Elf_Internal_Rela **rela1 = (const Elf_Internal_Rela**) arg1; |
| 1676 | const Elf_Internal_Rela **rela2 = (const Elf_Internal_Rela**) arg2; |
| 1677 | |
| 1678 | /* Sort by offset. */ |
| 1679 | return ((*rela1)->r_offset - (*rela2)->r_offset); |
| 1680 | } |
| 1681 | |
| 1682 | static bfd_boolean |
| 1683 | ppc_elf_relax_section (abfd, isec, link_info, again) |
| 1684 | bfd *abfd; |
| 1685 | asection *isec; |
| 1686 | struct bfd_link_info *link_info; |
| 1687 | bfd_boolean *again; |
| 1688 | { |
| 1689 | #define PAGESIZE 0x1000 |
| 1690 | |
| 1691 | bfd_byte *contents = NULL; |
| 1692 | bfd_byte *free_contents = NULL; |
| 1693 | Elf_Internal_Rela *internal_relocs = NULL; |
| 1694 | Elf_Internal_Rela *free_relocs = NULL; |
| 1695 | Elf_Internal_Rela **rela_comb = NULL; |
| 1696 | int comb_curr, comb_count; |
| 1697 | |
| 1698 | /* We never have to do this more than once per input section. */ |
| 1699 | *again = FALSE; |
| 1700 | |
| 1701 | /* If needed, initialize this section's cooked size. */ |
| 1702 | if (isec->_cooked_size == 0) |
| 1703 | isec->_cooked_size = isec->_raw_size; |
| 1704 | |
| 1705 | /* We're only interested in text sections which overlap the |
| 1706 | troublesome area at the end of a page. */ |
| 1707 | if (link_info->mpc860c0 && (isec->flags & SEC_CODE) && isec->_cooked_size) |
| 1708 | { |
| 1709 | bfd_vma dot, end_page, end_section; |
| 1710 | bfd_boolean section_modified; |
| 1711 | |
| 1712 | /* Get the section contents. */ |
| 1713 | /* Get cached copy if it exists. */ |
| 1714 | if (elf_section_data (isec)->this_hdr.contents != NULL) |
| 1715 | contents = elf_section_data (isec)->this_hdr.contents; |
| 1716 | else |
| 1717 | { |
| 1718 | /* Go get them off disk. */ |
| 1719 | contents = (bfd_byte *) bfd_malloc (isec->_raw_size); |
| 1720 | if (contents == NULL) |
| 1721 | goto error_return; |
| 1722 | free_contents = contents; |
| 1723 | |
| 1724 | if (! bfd_get_section_contents (abfd, isec, contents, |
| 1725 | (file_ptr) 0, isec->_raw_size)) |
| 1726 | goto error_return; |
| 1727 | } |
| 1728 | |
| 1729 | comb_curr = 0; |
| 1730 | comb_count = 0; |
| 1731 | if (isec->reloc_count) |
| 1732 | { |
| 1733 | unsigned n; |
| 1734 | bfd_size_type amt; |
| 1735 | |
| 1736 | /* Get a copy of the native relocations. */ |
| 1737 | internal_relocs |
| 1738 | = _bfd_elf_link_read_relocs (abfd, isec, (PTR) NULL, |
| 1739 | (Elf_Internal_Rela *) NULL, |
| 1740 | link_info->keep_memory); |
| 1741 | if (internal_relocs == NULL) |
| 1742 | goto error_return; |
| 1743 | if (! link_info->keep_memory) |
| 1744 | free_relocs = internal_relocs; |
| 1745 | |
| 1746 | /* Setup a faster access method for the reloc info we need. */ |
| 1747 | amt = isec->reloc_count; |
| 1748 | amt *= sizeof (Elf_Internal_Rela*); |
| 1749 | rela_comb = (Elf_Internal_Rela**) bfd_malloc (amt); |
| 1750 | if (rela_comb == NULL) |
| 1751 | goto error_return; |
| 1752 | for (n = 0; n < isec->reloc_count; ++n) |
| 1753 | { |
| 1754 | long r_type; |
| 1755 | |
| 1756 | r_type = ELF32_R_TYPE (internal_relocs[n].r_info); |
| 1757 | if (r_type < 0 || r_type >= (int) R_PPC_max) |
| 1758 | goto error_return; |
| 1759 | |
| 1760 | /* Prologue constants are sometimes present in the ".text" |
| 1761 | sections and they can be identified by their associated |
| 1762 | relocation. We don't want to process those words and |
| 1763 | some others which can also be identified by their |
| 1764 | relocations. However, not all conditional branches will |
| 1765 | have a relocation so we will only ignore words that |
| 1766 | 1) have a reloc, and 2) the reloc is not applicable to a |
| 1767 | conditional branch. The array rela_comb is built here |
| 1768 | for use in the EOP scan loop. */ |
| 1769 | switch (r_type) |
| 1770 | { |
| 1771 | case R_PPC_ADDR14_BRNTAKEN: |
| 1772 | case R_PPC_REL14: |
| 1773 | case R_PPC_REL14_BRNTAKEN: |
| 1774 | /* We should check the instruction. */ |
| 1775 | break; |
| 1776 | default: |
| 1777 | /* The word is not a conditional branch - ignore it. */ |
| 1778 | rela_comb[comb_count++] = &internal_relocs[n]; |
| 1779 | break; |
| 1780 | } |
| 1781 | } |
| 1782 | if (comb_count > 1) |
| 1783 | qsort (rela_comb, (size_t) comb_count, sizeof (int), |
| 1784 | ppc_elf_sort_rela); |
| 1785 | } |
| 1786 | |
| 1787 | /* Enumerate each EOP region that overlaps this section. */ |
| 1788 | end_section = isec->vma + isec->_cooked_size; |
| 1789 | dot = end_page = (isec->vma | (PAGESIZE - 1)) + 1; |
| 1790 | dot -= link_info->mpc860c0; |
| 1791 | section_modified = FALSE; |
| 1792 | /* Increment the start position if this section begins in the |
| 1793 | middle of its first EOP region. */ |
| 1794 | if (dot < isec->vma) |
| 1795 | dot = isec->vma; |
| 1796 | for (; |
| 1797 | dot < end_section; |
| 1798 | dot += PAGESIZE, end_page += PAGESIZE) |
| 1799 | { |
| 1800 | /* Check each word in this EOP region. */ |
| 1801 | for (; dot < end_page; dot += 4) |
| 1802 | { |
| 1803 | bfd_vma isec_offset; |
| 1804 | unsigned long insn; |
| 1805 | bfd_boolean skip, modified; |
| 1806 | |
| 1807 | /* Don't process this word if there is a relocation for it |
| 1808 | and the relocation indicates the word is not a |
| 1809 | conditional branch. */ |
| 1810 | skip = FALSE; |
| 1811 | isec_offset = dot - isec->vma; |
| 1812 | for (; comb_curr<comb_count; ++comb_curr) |
| 1813 | { |
| 1814 | bfd_vma r_offset; |
| 1815 | |
| 1816 | r_offset = rela_comb[comb_curr]->r_offset; |
| 1817 | if (r_offset >= isec_offset) |
| 1818 | { |
| 1819 | if (r_offset == isec_offset) skip = TRUE; |
| 1820 | break; |
| 1821 | } |
| 1822 | } |
| 1823 | if (skip) continue; |
| 1824 | |
| 1825 | /* Check the current word for a problematic conditional |
| 1826 | branch. */ |
| 1827 | #define BO0(insn) ((insn) & 0x02000000) |
| 1828 | #define BO2(insn) ((insn) & 0x00800000) |
| 1829 | #define BO4(insn) ((insn) & 0x00200000) |
| 1830 | insn = (unsigned long) bfd_get_32 (abfd, contents + isec_offset); |
| 1831 | modified = FALSE; |
| 1832 | if ((insn & 0xFc000000) == 0x40000000) |
| 1833 | { |
| 1834 | /* Instruction is BCx */ |
| 1835 | if ((!BO0(insn) || !BO2(insn)) && !BO4(insn)) |
| 1836 | { |
| 1837 | bfd_vma target; |
| 1838 | |
| 1839 | /* This branch is predicted as "normal". |
| 1840 | If this is a forward branch, it is problematic. */ |
| 1841 | target = insn & 0x0000Fffc; |
| 1842 | target = (target ^ 0x8000) - 0x8000; |
| 1843 | if ((insn & 0x00000002) == 0) |
| 1844 | /* Convert to abs. */ |
| 1845 | target += dot; |
| 1846 | if (target > dot) |
| 1847 | { |
| 1848 | /* Set the prediction bit. */ |
| 1849 | insn |= 0x00200000; |
| 1850 | modified = TRUE; |
| 1851 | } |
| 1852 | } |
| 1853 | } |
| 1854 | else if ((insn & 0xFc00Fffe) == 0x4c000420) |
| 1855 | { |
| 1856 | /* Instruction is BCCTRx. */ |
| 1857 | if ((!BO0(insn) || !BO2(insn)) && !BO4(insn)) |
| 1858 | { |
| 1859 | /* This branch is predicted as not-taken. |
| 1860 | If this is a forward branch, it is problematic. |
| 1861 | Since we can't tell statically if it will branch |
| 1862 | forward, always set the prediction bit. */ |
| 1863 | insn |= 0x00200000; |
| 1864 | modified = TRUE; |
| 1865 | } |
| 1866 | } |
| 1867 | else if ((insn & 0xFc00Fffe) == 0x4c000020) |
| 1868 | { |
| 1869 | /* Instruction is BCLRx */ |
| 1870 | if ((!BO0(insn) || !BO2(insn)) && !BO4(insn)) |
| 1871 | { |
| 1872 | /* This branch is predicted as not-taken. |
| 1873 | If this is a forward branch, it is problematic. |
| 1874 | Since we can't tell statically if it will branch |
| 1875 | forward, always set the prediction bit. */ |
| 1876 | insn |= 0x00200000; |
| 1877 | modified = TRUE; |
| 1878 | } |
| 1879 | } |
| 1880 | #undef BO0 |
| 1881 | #undef BO2 |
| 1882 | #undef BO4 |
| 1883 | if (modified) |
| 1884 | { |
| 1885 | bfd_put_32 (abfd, (bfd_vma) insn, contents + isec_offset); |
| 1886 | section_modified = TRUE; |
| 1887 | } |
| 1888 | } |
| 1889 | } |
| 1890 | if (section_modified) |
| 1891 | { |
| 1892 | elf_section_data (isec)->this_hdr.contents = contents; |
| 1893 | free_contents = NULL; |
| 1894 | } |
| 1895 | } |
| 1896 | |
| 1897 | if (rela_comb != NULL) |
| 1898 | { |
| 1899 | free (rela_comb); |
| 1900 | rela_comb = NULL; |
| 1901 | } |
| 1902 | |
| 1903 | if (free_relocs != NULL) |
| 1904 | { |
| 1905 | free (free_relocs); |
| 1906 | free_relocs = NULL; |
| 1907 | } |
| 1908 | |
| 1909 | if (free_contents != NULL) |
| 1910 | { |
| 1911 | if (! link_info->keep_memory) |
| 1912 | free (free_contents); |
| 1913 | else |
| 1914 | { |
| 1915 | /* Cache the section contents for elf_link_input_bfd. */ |
| 1916 | elf_section_data (isec)->this_hdr.contents = contents; |
| 1917 | } |
| 1918 | free_contents = NULL; |
| 1919 | } |
| 1920 | |
| 1921 | return TRUE; |
| 1922 | |
| 1923 | error_return: |
| 1924 | if (rela_comb != NULL) |
| 1925 | free (rela_comb); |
| 1926 | if (free_relocs != NULL) |
| 1927 | free (free_relocs); |
| 1928 | if (free_contents != NULL) |
| 1929 | free (free_contents); |
| 1930 | return FALSE; |
| 1931 | } |
| 1932 | \f |
| 1933 | static reloc_howto_type * |
| 1934 | ppc_elf_reloc_type_lookup (abfd, code) |
| 1935 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1936 | bfd_reloc_code_real_type code; |
| 1937 | { |
| 1938 | enum elf_ppc_reloc_type r; |
| 1939 | |
| 1940 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 1941 | /* Initialize howto table if needed. */ |
| 1942 | ppc_elf_howto_init (); |
| 1943 | |
| 1944 | switch ((int) code) |
| 1945 | { |
| 1946 | default: |
| 1947 | return (reloc_howto_type *) NULL; |
| 1948 | |
| 1949 | case BFD_RELOC_NONE: r = R_PPC_NONE; break; |
| 1950 | case BFD_RELOC_32: r = R_PPC_ADDR32; break; |
| 1951 | case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; |
| 1952 | case BFD_RELOC_16: r = R_PPC_ADDR16; break; |
| 1953 | case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; |
| 1954 | case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; |
| 1955 | case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; |
| 1956 | case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break; |
| 1957 | case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break; |
| 1958 | case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break; |
| 1959 | case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break; |
| 1960 | case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; |
| 1961 | case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; |
| 1962 | case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; |
| 1963 | case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; |
| 1964 | case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; |
| 1965 | case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; |
| 1966 | case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; |
| 1967 | case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break; |
| 1968 | case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break; |
| 1969 | case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break; |
| 1970 | case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break; |
| 1971 | case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; |
| 1972 | case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; |
| 1973 | case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; |
| 1974 | case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; |
| 1975 | case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; |
| 1976 | case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; |
| 1977 | case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; |
| 1978 | case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; |
| 1979 | case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; |
| 1980 | case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; |
| 1981 | case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; |
| 1982 | case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; |
| 1983 | case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; |
| 1984 | case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; |
| 1985 | case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; |
| 1986 | case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; |
| 1987 | case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; |
| 1988 | case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; |
| 1989 | case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; |
| 1990 | case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; |
| 1991 | case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; |
| 1992 | case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; |
| 1993 | case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; |
| 1994 | case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; |
| 1995 | case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break; |
| 1996 | case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break; |
| 1997 | case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break; |
| 1998 | case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break; |
| 1999 | case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break; |
| 2000 | case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break; |
| 2001 | case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break; |
| 2002 | case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break; |
| 2003 | case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break; |
| 2004 | case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break; |
| 2005 | case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break; |
| 2006 | case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break; |
| 2007 | case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break; |
| 2008 | case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break; |
| 2009 | case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break; |
| 2010 | case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break; |
| 2011 | case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break; |
| 2012 | case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break; |
| 2013 | case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break; |
| 2014 | case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break; |
| 2015 | case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break; |
| 2016 | case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break; |
| 2017 | case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break; |
| 2018 | case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break; |
| 2019 | case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break; |
| 2020 | case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break; |
| 2021 | case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break; |
| 2022 | case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break; |
| 2023 | case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break; |
| 2024 | case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break; |
| 2025 | case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break; |
| 2026 | case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break; |
| 2027 | case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break; |
| 2028 | case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break; |
| 2029 | case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break; |
| 2030 | } |
| 2031 | |
| 2032 | return ppc_elf_howto_table[(int) r]; |
| 2033 | }; |
| 2034 | |
| 2035 | /* Set the howto pointer for a PowerPC ELF reloc. */ |
| 2036 | |
| 2037 | static void |
| 2038 | ppc_elf_info_to_howto (abfd, cache_ptr, dst) |
| 2039 | bfd *abfd ATTRIBUTE_UNUSED; |
| 2040 | arelent *cache_ptr; |
| 2041 | Elf_Internal_Rela *dst; |
| 2042 | { |
| 2043 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 2044 | /* Initialize howto table if needed. */ |
| 2045 | ppc_elf_howto_init (); |
| 2046 | |
| 2047 | BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max); |
| 2048 | cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)]; |
| 2049 | } |
| 2050 | |
| 2051 | /* Handle the R_PPC_ADDR16_HA reloc. */ |
| 2052 | |
| 2053 | static bfd_reloc_status_type |
| 2054 | ppc_elf_addr16_ha_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 2055 | output_bfd, error_message) |
| 2056 | bfd *abfd ATTRIBUTE_UNUSED; |
| 2057 | arelent *reloc_entry; |
| 2058 | asymbol *symbol; |
| 2059 | PTR data ATTRIBUTE_UNUSED; |
| 2060 | asection *input_section; |
| 2061 | bfd *output_bfd; |
| 2062 | char **error_message ATTRIBUTE_UNUSED; |
| 2063 | { |
| 2064 | bfd_vma relocation; |
| 2065 | |
| 2066 | if (output_bfd != NULL) |
| 2067 | { |
| 2068 | reloc_entry->address += input_section->output_offset; |
| 2069 | return bfd_reloc_ok; |
| 2070 | } |
| 2071 | |
| 2072 | if (reloc_entry->address > input_section->_cooked_size) |
| 2073 | return bfd_reloc_outofrange; |
| 2074 | |
| 2075 | if (bfd_is_com_section (symbol->section)) |
| 2076 | relocation = 0; |
| 2077 | else |
| 2078 | relocation = symbol->value; |
| 2079 | |
| 2080 | relocation += symbol->section->output_section->vma; |
| 2081 | relocation += symbol->section->output_offset; |
| 2082 | relocation += reloc_entry->addend; |
| 2083 | |
| 2084 | reloc_entry->addend += (relocation & 0x8000) << 1; |
| 2085 | |
| 2086 | return bfd_reloc_continue; |
| 2087 | } |
| 2088 | |
| 2089 | static bfd_reloc_status_type |
| 2090 | ppc_elf_unhandled_reloc (abfd, reloc_entry, symbol, data, |
| 2091 | input_section, output_bfd, error_message) |
| 2092 | bfd *abfd; |
| 2093 | arelent *reloc_entry; |
| 2094 | asymbol *symbol; |
| 2095 | PTR data; |
| 2096 | asection *input_section; |
| 2097 | bfd *output_bfd; |
| 2098 | char **error_message; |
| 2099 | { |
| 2100 | /* If this is a relocatable link (output_bfd test tells us), just |
| 2101 | call the generic function. Any adjustment will be done at final |
| 2102 | link time. */ |
| 2103 | if (output_bfd != NULL) |
| 2104 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 2105 | input_section, output_bfd, error_message); |
| 2106 | |
| 2107 | if (error_message != NULL) |
| 2108 | { |
| 2109 | static char buf[60]; |
| 2110 | sprintf (buf, "generic linker can't handle %s", |
| 2111 | reloc_entry->howto->name); |
| 2112 | *error_message = buf; |
| 2113 | } |
| 2114 | return bfd_reloc_dangerous; |
| 2115 | } |
| 2116 | |
| 2117 | /* Fix bad default arch selected for a 32 bit input bfd when the |
| 2118 | default is 64 bit. */ |
| 2119 | |
| 2120 | static bfd_boolean |
| 2121 | ppc_elf_object_p (abfd) |
| 2122 | bfd *abfd; |
| 2123 | { |
| 2124 | if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64) |
| 2125 | { |
| 2126 | Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); |
| 2127 | |
| 2128 | if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32) |
| 2129 | { |
| 2130 | /* Relies on arch after 64 bit default being 32 bit default. */ |
| 2131 | abfd->arch_info = abfd->arch_info->next; |
| 2132 | BFD_ASSERT (abfd->arch_info->bits_per_word == 32); |
| 2133 | } |
| 2134 | } |
| 2135 | return TRUE; |
| 2136 | } |
| 2137 | |
| 2138 | /* Function to set whether a module needs the -mrelocatable bit set. */ |
| 2139 | |
| 2140 | static bfd_boolean |
| 2141 | ppc_elf_set_private_flags (abfd, flags) |
| 2142 | bfd *abfd; |
| 2143 | flagword flags; |
| 2144 | { |
| 2145 | BFD_ASSERT (!elf_flags_init (abfd) |
| 2146 | || elf_elfheader (abfd)->e_flags == flags); |
| 2147 | |
| 2148 | elf_elfheader (abfd)->e_flags = flags; |
| 2149 | elf_flags_init (abfd) = TRUE; |
| 2150 | return TRUE; |
| 2151 | } |
| 2152 | |
| 2153 | /* Merge backend specific data from an object file to the output |
| 2154 | object file when linking. */ |
| 2155 | |
| 2156 | static bfd_boolean |
| 2157 | ppc_elf_merge_private_bfd_data (ibfd, obfd) |
| 2158 | bfd *ibfd; |
| 2159 | bfd *obfd; |
| 2160 | { |
| 2161 | flagword old_flags; |
| 2162 | flagword new_flags; |
| 2163 | bfd_boolean error; |
| 2164 | |
| 2165 | /* Check if we have the same endianess. */ |
| 2166 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) |
| 2167 | return FALSE; |
| 2168 | |
| 2169 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 2170 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 2171 | return TRUE; |
| 2172 | |
| 2173 | new_flags = elf_elfheader (ibfd)->e_flags; |
| 2174 | old_flags = elf_elfheader (obfd)->e_flags; |
| 2175 | if (!elf_flags_init (obfd)) |
| 2176 | { |
| 2177 | /* First call, no flags set. */ |
| 2178 | elf_flags_init (obfd) = TRUE; |
| 2179 | elf_elfheader (obfd)->e_flags = new_flags; |
| 2180 | } |
| 2181 | |
| 2182 | /* Compatible flags are ok. */ |
| 2183 | else if (new_flags == old_flags) |
| 2184 | ; |
| 2185 | |
| 2186 | /* Incompatible flags. */ |
| 2187 | else |
| 2188 | { |
| 2189 | /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib |
| 2190 | to be linked with either. */ |
| 2191 | error = FALSE; |
| 2192 | if ((new_flags & EF_PPC_RELOCATABLE) != 0 |
| 2193 | && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) |
| 2194 | { |
| 2195 | error = TRUE; |
| 2196 | (*_bfd_error_handler) |
| 2197 | (_("%s: compiled with -mrelocatable and linked with modules compiled normally"), |
| 2198 | bfd_archive_filename (ibfd)); |
| 2199 | } |
| 2200 | else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 |
| 2201 | && (old_flags & EF_PPC_RELOCATABLE) != 0) |
| 2202 | { |
| 2203 | error = TRUE; |
| 2204 | (*_bfd_error_handler) |
| 2205 | (_("%s: compiled normally and linked with modules compiled with -mrelocatable"), |
| 2206 | bfd_archive_filename (ibfd)); |
| 2207 | } |
| 2208 | |
| 2209 | /* The output is -mrelocatable-lib iff both the input files are. */ |
| 2210 | if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) |
| 2211 | elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; |
| 2212 | |
| 2213 | /* The output is -mrelocatable iff it can't be -mrelocatable-lib, |
| 2214 | but each input file is either -mrelocatable or -mrelocatable-lib. */ |
| 2215 | if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) |
| 2216 | && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) |
| 2217 | && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) |
| 2218 | elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; |
| 2219 | |
| 2220 | /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if |
| 2221 | any module uses it. */ |
| 2222 | elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); |
| 2223 | |
| 2224 | new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| 2225 | old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| 2226 | |
| 2227 | /* Warn about any other mismatches. */ |
| 2228 | if (new_flags != old_flags) |
| 2229 | { |
| 2230 | error = TRUE; |
| 2231 | (*_bfd_error_handler) |
| 2232 | (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), |
| 2233 | bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags); |
| 2234 | } |
| 2235 | |
| 2236 | if (error) |
| 2237 | { |
| 2238 | bfd_set_error (bfd_error_bad_value); |
| 2239 | return FALSE; |
| 2240 | } |
| 2241 | } |
| 2242 | |
| 2243 | return TRUE; |
| 2244 | } |
| 2245 | \f |
| 2246 | /* Handle a PowerPC specific section when reading an object file. This |
| 2247 | is called when elfcode.h finds a section with an unknown type. */ |
| 2248 | |
| 2249 | static bfd_boolean |
| 2250 | ppc_elf_section_from_shdr (abfd, hdr, name) |
| 2251 | bfd *abfd; |
| 2252 | Elf_Internal_Shdr *hdr; |
| 2253 | const char *name; |
| 2254 | { |
| 2255 | asection *newsect; |
| 2256 | flagword flags; |
| 2257 | |
| 2258 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) |
| 2259 | return FALSE; |
| 2260 | |
| 2261 | newsect = hdr->bfd_section; |
| 2262 | flags = bfd_get_section_flags (abfd, newsect); |
| 2263 | if (hdr->sh_flags & SHF_EXCLUDE) |
| 2264 | flags |= SEC_EXCLUDE; |
| 2265 | |
| 2266 | if (hdr->sh_type == SHT_ORDERED) |
| 2267 | flags |= SEC_SORT_ENTRIES; |
| 2268 | |
| 2269 | bfd_set_section_flags (abfd, newsect, flags); |
| 2270 | return TRUE; |
| 2271 | } |
| 2272 | \f |
| 2273 | /* Set up any other section flags and such that may be necessary. */ |
| 2274 | |
| 2275 | static bfd_boolean |
| 2276 | ppc_elf_fake_sections (abfd, shdr, asect) |
| 2277 | bfd *abfd ATTRIBUTE_UNUSED; |
| 2278 | Elf_Internal_Shdr *shdr; |
| 2279 | asection *asect; |
| 2280 | { |
| 2281 | if ((asect->flags & SEC_EXCLUDE) != 0) |
| 2282 | shdr->sh_flags |= SHF_EXCLUDE; |
| 2283 | |
| 2284 | if ((asect->flags & SEC_SORT_ENTRIES) != 0) |
| 2285 | shdr->sh_type = SHT_ORDERED; |
| 2286 | |
| 2287 | return TRUE; |
| 2288 | } |
| 2289 | \f |
| 2290 | /* Create a special linker section */ |
| 2291 | static elf_linker_section_t * |
| 2292 | ppc_elf_create_linker_section (abfd, info, which) |
| 2293 | bfd *abfd; |
| 2294 | struct bfd_link_info *info; |
| 2295 | enum elf_linker_section_enum which; |
| 2296 | { |
| 2297 | bfd *dynobj = elf_hash_table (info)->dynobj; |
| 2298 | elf_linker_section_t *lsect; |
| 2299 | |
| 2300 | /* Record the first bfd section that needs the special section. */ |
| 2301 | if (!dynobj) |
| 2302 | dynobj = elf_hash_table (info)->dynobj = abfd; |
| 2303 | |
| 2304 | /* If this is the first time, create the section. */ |
| 2305 | lsect = elf_linker_section (dynobj, which); |
| 2306 | if (!lsect) |
| 2307 | { |
| 2308 | elf_linker_section_t defaults; |
| 2309 | static elf_linker_section_t zero_section; |
| 2310 | |
| 2311 | defaults = zero_section; |
| 2312 | defaults.which = which; |
| 2313 | defaults.hole_written_p = FALSE; |
| 2314 | defaults.alignment = 2; |
| 2315 | |
| 2316 | /* Both of these sections are (technically) created by the user |
| 2317 | putting data in them, so they shouldn't be marked |
| 2318 | SEC_LINKER_CREATED. |
| 2319 | |
| 2320 | The linker creates them so it has somewhere to attach their |
| 2321 | respective symbols. In fact, if they were empty it would |
| 2322 | be OK to leave the symbol set to 0 (or any random number), because |
| 2323 | the appropriate register should never be used. */ |
| 2324 | defaults.flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| 2325 | | SEC_IN_MEMORY); |
| 2326 | |
| 2327 | switch (which) |
| 2328 | { |
| 2329 | default: |
| 2330 | (*_bfd_error_handler) (_("%s: unknown special linker type %d"), |
| 2331 | bfd_get_filename (abfd), |
| 2332 | (int) which); |
| 2333 | |
| 2334 | bfd_set_error (bfd_error_bad_value); |
| 2335 | return (elf_linker_section_t *) 0; |
| 2336 | |
| 2337 | case LINKER_SECTION_SDATA: /* .sdata/.sbss section */ |
| 2338 | defaults.name = ".sdata"; |
| 2339 | defaults.rel_name = ".rela.sdata"; |
| 2340 | defaults.bss_name = ".sbss"; |
| 2341 | defaults.sym_name = "_SDA_BASE_"; |
| 2342 | defaults.sym_offset = 32768; |
| 2343 | break; |
| 2344 | |
| 2345 | case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */ |
| 2346 | defaults.name = ".sdata2"; |
| 2347 | defaults.rel_name = ".rela.sdata2"; |
| 2348 | defaults.bss_name = ".sbss2"; |
| 2349 | defaults.sym_name = "_SDA2_BASE_"; |
| 2350 | defaults.sym_offset = 32768; |
| 2351 | defaults.flags |= SEC_READONLY; |
| 2352 | break; |
| 2353 | } |
| 2354 | |
| 2355 | lsect = _bfd_elf_create_linker_section (abfd, info, which, &defaults); |
| 2356 | } |
| 2357 | |
| 2358 | return lsect; |
| 2359 | } |
| 2360 | \f |
| 2361 | /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we |
| 2362 | need to bump up the number of section headers. */ |
| 2363 | |
| 2364 | static int |
| 2365 | ppc_elf_additional_program_headers (abfd) |
| 2366 | bfd *abfd; |
| 2367 | { |
| 2368 | asection *s; |
| 2369 | int ret; |
| 2370 | |
| 2371 | ret = 0; |
| 2372 | |
| 2373 | s = bfd_get_section_by_name (abfd, ".interp"); |
| 2374 | if (s != NULL) |
| 2375 | ++ret; |
| 2376 | |
| 2377 | s = bfd_get_section_by_name (abfd, ".sbss2"); |
| 2378 | if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0) |
| 2379 | ++ret; |
| 2380 | |
| 2381 | s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); |
| 2382 | if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0) |
| 2383 | ++ret; |
| 2384 | |
| 2385 | return ret; |
| 2386 | } |
| 2387 | |
| 2388 | /* Modify the segment map if needed. */ |
| 2389 | |
| 2390 | static bfd_boolean |
| 2391 | ppc_elf_modify_segment_map (abfd) |
| 2392 | bfd *abfd ATTRIBUTE_UNUSED; |
| 2393 | { |
| 2394 | return TRUE; |
| 2395 | } |
| 2396 | \f |
| 2397 | /* The powerpc .got has a blrl instruction in it. Mark it executable. */ |
| 2398 | |
| 2399 | static bfd_boolean |
| 2400 | ppc_elf_create_got (abfd, info) |
| 2401 | bfd *abfd; |
| 2402 | struct bfd_link_info *info; |
| 2403 | { |
| 2404 | struct ppc_elf_link_hash_table *htab; |
| 2405 | asection *s; |
| 2406 | flagword flags; |
| 2407 | |
| 2408 | if (!_bfd_elf_create_got_section (abfd, info)) |
| 2409 | return FALSE; |
| 2410 | |
| 2411 | htab = ppc_elf_hash_table (info); |
| 2412 | htab->got = s = bfd_get_section_by_name (abfd, ".got"); |
| 2413 | if (s == NULL) |
| 2414 | abort (); |
| 2415 | |
| 2416 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 2417 | | SEC_LINKER_CREATED); |
| 2418 | if (!bfd_set_section_flags (abfd, s, flags)) |
| 2419 | return FALSE; |
| 2420 | |
| 2421 | htab->relgot = bfd_make_section (abfd, ".rela.got"); |
| 2422 | if (!htab->relgot |
| 2423 | || ! bfd_set_section_flags (abfd, htab->relgot, |
| 2424 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| 2425 | | SEC_IN_MEMORY | SEC_LINKER_CREATED |
| 2426 | | SEC_READONLY)) |
| 2427 | || ! bfd_set_section_alignment (abfd, htab->relgot, 2)) |
| 2428 | return FALSE; |
| 2429 | |
| 2430 | return TRUE; |
| 2431 | } |
| 2432 | |
| 2433 | /* We have to create .dynsbss and .rela.sbss here so that they get mapped |
| 2434 | to output sections (just like _bfd_elf_create_dynamic_sections has |
| 2435 | to create .dynbss and .rela.bss). */ |
| 2436 | |
| 2437 | static bfd_boolean |
| 2438 | ppc_elf_create_dynamic_sections (abfd, info) |
| 2439 | bfd *abfd; |
| 2440 | struct bfd_link_info *info; |
| 2441 | { |
| 2442 | struct ppc_elf_link_hash_table *htab; |
| 2443 | asection *s; |
| 2444 | flagword flags; |
| 2445 | |
| 2446 | if (!ppc_elf_create_got (abfd, info)) |
| 2447 | return FALSE; |
| 2448 | |
| 2449 | if (!_bfd_elf_create_dynamic_sections (abfd, info)) |
| 2450 | return FALSE; |
| 2451 | |
| 2452 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 2453 | | SEC_LINKER_CREATED); |
| 2454 | |
| 2455 | htab = ppc_elf_hash_table (info); |
| 2456 | htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss"); |
| 2457 | htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss"); |
| 2458 | if (s == NULL |
| 2459 | || ! bfd_set_section_flags (abfd, s, SEC_ALLOC)) |
| 2460 | return FALSE; |
| 2461 | |
| 2462 | if (! info->shared) |
| 2463 | { |
| 2464 | htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss"); |
| 2465 | htab->relsbss = s = bfd_make_section (abfd, ".rela.sbss"); |
| 2466 | if (s == NULL |
| 2467 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) |
| 2468 | || ! bfd_set_section_alignment (abfd, s, 2)) |
| 2469 | return FALSE; |
| 2470 | } |
| 2471 | |
| 2472 | htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt"); |
| 2473 | htab->plt = s = bfd_get_section_by_name (abfd, ".plt"); |
| 2474 | if (s == NULL) |
| 2475 | abort (); |
| 2476 | |
| 2477 | flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED; |
| 2478 | return bfd_set_section_flags (abfd, s, flags); |
| 2479 | } |
| 2480 | |
| 2481 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 2482 | regular object. The current definition is in some section of the |
| 2483 | dynamic object, but we're not including those sections. We have to |
| 2484 | change the definition to something the rest of the link can |
| 2485 | understand. */ |
| 2486 | |
| 2487 | static bfd_boolean |
| 2488 | ppc_elf_adjust_dynamic_symbol (info, h) |
| 2489 | struct bfd_link_info *info; |
| 2490 | struct elf_link_hash_entry *h; |
| 2491 | { |
| 2492 | struct ppc_elf_link_hash_table *htab; |
| 2493 | asection *s; |
| 2494 | unsigned int power_of_two; |
| 2495 | |
| 2496 | #ifdef DEBUG |
| 2497 | fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", |
| 2498 | h->root.root.string); |
| 2499 | #endif |
| 2500 | |
| 2501 | /* Make sure we know what is going on here. */ |
| 2502 | htab = ppc_elf_hash_table (info); |
| 2503 | BFD_ASSERT (htab->elf.dynobj != NULL |
| 2504 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) |
| 2505 | || h->weakdef != NULL |
| 2506 | || ((h->elf_link_hash_flags |
| 2507 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 2508 | && (h->elf_link_hash_flags |
| 2509 | & ELF_LINK_HASH_REF_REGULAR) != 0 |
| 2510 | && (h->elf_link_hash_flags |
| 2511 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); |
| 2512 | |
| 2513 | /* Deal with function syms. */ |
| 2514 | if (h->type == STT_FUNC |
| 2515 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| 2516 | { |
| 2517 | /* Clear procedure linkage table information for any symbol that |
| 2518 | won't need a .plt entry. */ |
| 2519 | if (! htab->elf.dynamic_sections_created |
| 2520 | || SYMBOL_CALLS_LOCAL (info, h) |
| 2521 | || h->plt.refcount <= 0) |
| 2522 | { |
| 2523 | /* A PLT entry is not required/allowed when: |
| 2524 | |
| 2525 | 1. We are not using ld.so; because then the PLT entry |
| 2526 | can't be set up, so we can't use one. |
| 2527 | |
| 2528 | 2. We know for certain that a call to this symbol |
| 2529 | will go to this object. |
| 2530 | |
| 2531 | 3. GC has rendered the entry unused. */ |
| 2532 | h->plt.offset = (bfd_vma) -1; |
| 2533 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 2534 | } |
| 2535 | return TRUE; |
| 2536 | } |
| 2537 | else |
| 2538 | h->plt.offset = (bfd_vma) -1; |
| 2539 | |
| 2540 | /* If this is a weak symbol, and there is a real definition, the |
| 2541 | processor independent code will have arranged for us to see the |
| 2542 | real definition first, and we can just use the same value. */ |
| 2543 | if (h->weakdef != NULL) |
| 2544 | { |
| 2545 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
| 2546 | || h->weakdef->root.type == bfd_link_hash_defweak); |
| 2547 | h->root.u.def.section = h->weakdef->root.u.def.section; |
| 2548 | h->root.u.def.value = h->weakdef->root.u.def.value; |
| 2549 | if (ELIMINATE_COPY_RELOCS) |
| 2550 | h->elf_link_hash_flags |
| 2551 | = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF) |
| 2552 | | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF)); |
| 2553 | return TRUE; |
| 2554 | } |
| 2555 | |
| 2556 | /* This is a reference to a symbol defined by a dynamic object which |
| 2557 | is not a function. */ |
| 2558 | |
| 2559 | /* If we are creating a shared library, we must presume that the |
| 2560 | only references to the symbol are via the global offset table. |
| 2561 | For such cases we need not do anything here; the relocations will |
| 2562 | be handled correctly by relocate_section. */ |
| 2563 | if (info->shared) |
| 2564 | return TRUE; |
| 2565 | |
| 2566 | /* If there are no references to this symbol that do not use the |
| 2567 | GOT, we don't need to generate a copy reloc. */ |
| 2568 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) |
| 2569 | return TRUE; |
| 2570 | |
| 2571 | if (ELIMINATE_COPY_RELOCS) |
| 2572 | { |
| 2573 | struct ppc_elf_dyn_relocs *p; |
| 2574 | for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) |
| 2575 | { |
| 2576 | s = p->sec->output_section; |
| 2577 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 2578 | break; |
| 2579 | } |
| 2580 | |
| 2581 | /* If we didn't find any dynamic relocs in read-only sections, then |
| 2582 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
| 2583 | if (p == NULL) |
| 2584 | { |
| 2585 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; |
| 2586 | return TRUE; |
| 2587 | } |
| 2588 | } |
| 2589 | |
| 2590 | /* We must allocate the symbol in our .dynbss section, which will |
| 2591 | become part of the .bss section of the executable. There will be |
| 2592 | an entry for this symbol in the .dynsym section. The dynamic |
| 2593 | object will contain position independent code, so all references |
| 2594 | from the dynamic object to this symbol will go through the global |
| 2595 | offset table. The dynamic linker will use the .dynsym entry to |
| 2596 | determine the address it must put in the global offset table, so |
| 2597 | both the dynamic object and the regular object will refer to the |
| 2598 | same memory location for the variable. |
| 2599 | |
| 2600 | Of course, if the symbol is sufficiently small, we must instead |
| 2601 | allocate it in .sbss. FIXME: It would be better to do this if and |
| 2602 | only if there were actually SDAREL relocs for that symbol. */ |
| 2603 | |
| 2604 | if (h->size <= elf_gp_size (htab->elf.dynobj)) |
| 2605 | s = htab->dynsbss; |
| 2606 | else |
| 2607 | s = htab->dynbss; |
| 2608 | BFD_ASSERT (s != NULL); |
| 2609 | |
| 2610 | /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to |
| 2611 | copy the initial value out of the dynamic object and into the |
| 2612 | runtime process image. We need to remember the offset into the |
| 2613 | .rela.bss section we are going to use. */ |
| 2614 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 2615 | { |
| 2616 | asection *srel; |
| 2617 | |
| 2618 | if (h->size <= elf_gp_size (htab->elf.dynobj)) |
| 2619 | srel = htab->relsbss; |
| 2620 | else |
| 2621 | srel = htab->relbss; |
| 2622 | BFD_ASSERT (srel != NULL); |
| 2623 | srel->_raw_size += sizeof (Elf32_External_Rela); |
| 2624 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
| 2625 | } |
| 2626 | |
| 2627 | /* We need to figure out the alignment required for this symbol. I |
| 2628 | have no idea how ELF linkers handle this. */ |
| 2629 | power_of_two = bfd_log2 (h->size); |
| 2630 | if (power_of_two > 4) |
| 2631 | power_of_two = 4; |
| 2632 | |
| 2633 | /* Apply the required alignment. */ |
| 2634 | s->_raw_size = BFD_ALIGN (s->_raw_size, |
| 2635 | (bfd_size_type) (1 << power_of_two)); |
| 2636 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) |
| 2637 | { |
| 2638 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
| 2639 | return FALSE; |
| 2640 | } |
| 2641 | |
| 2642 | /* Define the symbol as being at this point in the section. */ |
| 2643 | h->root.u.def.section = s; |
| 2644 | h->root.u.def.value = s->_raw_size; |
| 2645 | |
| 2646 | /* Increment the section size to make room for the symbol. */ |
| 2647 | s->_raw_size += h->size; |
| 2648 | |
| 2649 | return TRUE; |
| 2650 | } |
| 2651 | \f |
| 2652 | /* This is the condition under which finish_dynamic_symbol will be |
| 2653 | called from elflink.h. If elflink.h doesn't call our |
| 2654 | finish_dynamic_symbol routine, we'll need to do something about |
| 2655 | initializing any .plt and .got entries in relocate_section. */ |
| 2656 | #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \ |
| 2657 | ((DYN) \ |
| 2658 | && ((SHARED) \ |
| 2659 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ |
| 2660 | && ((H)->dynindx != -1 \ |
| 2661 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) |
| 2662 | |
| 2663 | /* Of those relocs that might be copied as dynamic relocs, this macro |
| 2664 | selects those that must be copied when linking a shared library, |
| 2665 | even when the symbol is local. */ |
| 2666 | |
| 2667 | #define MUST_BE_DYN_RELOC(RTYPE) \ |
| 2668 | ((RTYPE) != R_PPC_REL24 \ |
| 2669 | && (RTYPE) != R_PPC_REL14 \ |
| 2670 | && (RTYPE) != R_PPC_REL14_BRTAKEN \ |
| 2671 | && (RTYPE) != R_PPC_REL14_BRNTAKEN \ |
| 2672 | && (RTYPE) != R_PPC_REL32) |
| 2673 | |
| 2674 | /* Allocate space in associated reloc sections for dynamic relocs. */ |
| 2675 | |
| 2676 | static bfd_boolean |
| 2677 | allocate_dynrelocs (h, inf) |
| 2678 | struct elf_link_hash_entry *h; |
| 2679 | PTR inf; |
| 2680 | { |
| 2681 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| 2682 | struct ppc_elf_link_hash_entry *eh; |
| 2683 | struct ppc_elf_link_hash_table *htab; |
| 2684 | struct ppc_elf_dyn_relocs *p; |
| 2685 | |
| 2686 | if (h->root.type == bfd_link_hash_indirect) |
| 2687 | return TRUE; |
| 2688 | |
| 2689 | if (h->root.type == bfd_link_hash_warning) |
| 2690 | /* When warning symbols are created, they **replace** the "real" |
| 2691 | entry in the hash table, thus we never get to see the real |
| 2692 | symbol in a hash traversal. So look at it now. */ |
| 2693 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 2694 | |
| 2695 | htab = ppc_elf_hash_table (info); |
| 2696 | if (htab->elf.dynamic_sections_created |
| 2697 | && h->plt.refcount > 0 |
| 2698 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 2699 | || h->root.type != bfd_link_hash_undefweak)) |
| 2700 | { |
| 2701 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 2702 | if (h->dynindx == -1 |
| 2703 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
| 2704 | { |
| 2705 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 2706 | return FALSE; |
| 2707 | } |
| 2708 | |
| 2709 | if (info->shared |
| 2710 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
| 2711 | { |
| 2712 | asection *s = htab->plt; |
| 2713 | |
| 2714 | /* If this is the first .plt entry, make room for the special |
| 2715 | first entry. */ |
| 2716 | if (s->_raw_size == 0) |
| 2717 | s->_raw_size += PLT_INITIAL_ENTRY_SIZE; |
| 2718 | |
| 2719 | /* The PowerPC PLT is actually composed of two parts, the |
| 2720 | first part is 2 words (for a load and a jump), and then |
| 2721 | there is a remaining word available at the end. */ |
| 2722 | h->plt.offset = (PLT_INITIAL_ENTRY_SIZE |
| 2723 | + (PLT_SLOT_SIZE |
| 2724 | * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) |
| 2725 | / PLT_ENTRY_SIZE))); |
| 2726 | |
| 2727 | /* If this symbol is not defined in a regular file, and we |
| 2728 | are not generating a shared library, then set the symbol |
| 2729 | to this location in the .plt. This is required to make |
| 2730 | function pointers compare as equal between the normal |
| 2731 | executable and the shared library. */ |
| 2732 | if (! info->shared |
| 2733 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 2734 | { |
| 2735 | h->root.u.def.section = s; |
| 2736 | h->root.u.def.value = h->plt.offset; |
| 2737 | } |
| 2738 | |
| 2739 | /* Make room for this entry. After the 8192nd entry, room |
| 2740 | for two entries is allocated. */ |
| 2741 | s->_raw_size += PLT_ENTRY_SIZE; |
| 2742 | if ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE |
| 2743 | >= PLT_NUM_SINGLE_ENTRIES) |
| 2744 | s->_raw_size += PLT_ENTRY_SIZE; |
| 2745 | |
| 2746 | /* We also need to make an entry in the .rela.plt section. */ |
| 2747 | htab->relplt->_raw_size += sizeof (Elf32_External_Rela); |
| 2748 | } |
| 2749 | else |
| 2750 | { |
| 2751 | h->plt.offset = (bfd_vma) -1; |
| 2752 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 2753 | } |
| 2754 | } |
| 2755 | else |
| 2756 | { |
| 2757 | h->plt.offset = (bfd_vma) -1; |
| 2758 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 2759 | } |
| 2760 | |
| 2761 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 2762 | if (eh->elf.got.refcount > 0) |
| 2763 | { |
| 2764 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 2765 | if (eh->elf.dynindx == -1 |
| 2766 | && (eh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
| 2767 | { |
| 2768 | if (!bfd_elf32_link_record_dynamic_symbol (info, &eh->elf)) |
| 2769 | return FALSE; |
| 2770 | } |
| 2771 | |
| 2772 | if (eh->tls_mask == (TLS_TLS | TLS_LD) |
| 2773 | && !(eh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)) |
| 2774 | /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */ |
| 2775 | eh->elf.got.offset = (bfd_vma) -1; |
| 2776 | else |
| 2777 | { |
| 2778 | bfd_boolean dyn; |
| 2779 | eh->elf.got.offset = htab->got->_raw_size; |
| 2780 | if ((eh->tls_mask & TLS_TLS) != 0) |
| 2781 | { |
| 2782 | if ((eh->tls_mask & TLS_LD) != 0) |
| 2783 | htab->got->_raw_size += 8; |
| 2784 | if ((eh->tls_mask & TLS_GD) != 0) |
| 2785 | htab->got->_raw_size += 8; |
| 2786 | if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0) |
| 2787 | htab->got->_raw_size += 4; |
| 2788 | if ((eh->tls_mask & TLS_DTPREL) != 0) |
| 2789 | htab->got->_raw_size += 4; |
| 2790 | } |
| 2791 | else |
| 2792 | htab->got->_raw_size += 4; |
| 2793 | dyn = htab->elf.dynamic_sections_created; |
| 2794 | if ((info->shared |
| 2795 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf)) |
| 2796 | && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT |
| 2797 | || eh->elf.root.type != bfd_link_hash_undefweak)) |
| 2798 | { |
| 2799 | /* All the entries we allocated need relocs. */ |
| 2800 | htab->relgot->_raw_size |
| 2801 | += ((htab->got->_raw_size - eh->elf.got.offset) / 4 |
| 2802 | * sizeof (Elf32_External_Rela)); |
| 2803 | /* Except LD only needs one. */ |
| 2804 | if ((eh->tls_mask & TLS_LD) != 0) |
| 2805 | htab->relgot->_raw_size -= sizeof (Elf32_External_Rela); |
| 2806 | } |
| 2807 | } |
| 2808 | } |
| 2809 | else |
| 2810 | eh->elf.got.offset = (bfd_vma) -1; |
| 2811 | |
| 2812 | if (eh->dyn_relocs == NULL) |
| 2813 | return TRUE; |
| 2814 | |
| 2815 | /* In the shared -Bsymbolic case, discard space allocated for |
| 2816 | dynamic pc-relative relocs against symbols which turn out to be |
| 2817 | defined in regular objects. For the normal shared case, discard |
| 2818 | space for relocs that have become local due to symbol visibility |
| 2819 | changes. */ |
| 2820 | if (info->shared) |
| 2821 | { |
| 2822 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 |
| 2823 | && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 |
| 2824 | || info->symbolic)) |
| 2825 | { |
| 2826 | struct ppc_elf_dyn_relocs **pp; |
| 2827 | |
| 2828 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| 2829 | { |
| 2830 | p->count -= p->pc_count; |
| 2831 | p->pc_count = 0; |
| 2832 | if (p->count == 0) |
| 2833 | *pp = p->next; |
| 2834 | else |
| 2835 | pp = &p->next; |
| 2836 | } |
| 2837 | } |
| 2838 | |
| 2839 | /* Also discard relocs on undefined weak syms with non-default |
| 2840 | visibility. */ |
| 2841 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 2842 | && h->root.type == bfd_link_hash_undefweak) |
| 2843 | eh->dyn_relocs = NULL; |
| 2844 | } |
| 2845 | else if (ELIMINATE_COPY_RELOCS) |
| 2846 | { |
| 2847 | /* For the non-shared case, discard space for relocs against |
| 2848 | symbols which turn out to need copy relocs or are not |
| 2849 | dynamic. */ |
| 2850 | |
| 2851 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 |
| 2852 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 2853 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 2854 | { |
| 2855 | /* Make sure this symbol is output as a dynamic symbol. |
| 2856 | Undefined weak syms won't yet be marked as dynamic. */ |
| 2857 | if (h->dynindx == -1 |
| 2858 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
| 2859 | { |
| 2860 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) |
| 2861 | return FALSE; |
| 2862 | } |
| 2863 | |
| 2864 | /* If that succeeded, we know we'll be keeping all the |
| 2865 | relocs. */ |
| 2866 | if (h->dynindx != -1) |
| 2867 | goto keep; |
| 2868 | } |
| 2869 | |
| 2870 | eh->dyn_relocs = NULL; |
| 2871 | |
| 2872 | keep: ; |
| 2873 | } |
| 2874 | |
| 2875 | /* Finally, allocate space. */ |
| 2876 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 2877 | { |
| 2878 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
| 2879 | sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela); |
| 2880 | } |
| 2881 | |
| 2882 | return TRUE; |
| 2883 | } |
| 2884 | |
| 2885 | /* Find any dynamic relocs that apply to read-only sections. */ |
| 2886 | |
| 2887 | static bfd_boolean |
| 2888 | readonly_dynrelocs (h, info) |
| 2889 | struct elf_link_hash_entry *h; |
| 2890 | PTR info; |
| 2891 | { |
| 2892 | struct ppc_elf_dyn_relocs *p; |
| 2893 | |
| 2894 | if (h->root.type == bfd_link_hash_indirect) |
| 2895 | return TRUE; |
| 2896 | |
| 2897 | if (h->root.type == bfd_link_hash_warning) |
| 2898 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 2899 | |
| 2900 | for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) |
| 2901 | { |
| 2902 | asection *s = p->sec->output_section; |
| 2903 | |
| 2904 | if (s != NULL |
| 2905 | && ((s->flags & (SEC_READONLY | SEC_ALLOC)) |
| 2906 | == (SEC_READONLY | SEC_ALLOC))) |
| 2907 | { |
| 2908 | ((struct bfd_link_info *) info)->flags |= DF_TEXTREL; |
| 2909 | |
| 2910 | /* Not an error, just cut short the traversal. */ |
| 2911 | return FALSE; |
| 2912 | } |
| 2913 | } |
| 2914 | return TRUE; |
| 2915 | } |
| 2916 | |
| 2917 | /* Set the sizes of the dynamic sections. */ |
| 2918 | |
| 2919 | static bfd_boolean |
| 2920 | ppc_elf_size_dynamic_sections (output_bfd, info) |
| 2921 | bfd *output_bfd ATTRIBUTE_UNUSED; |
| 2922 | struct bfd_link_info *info; |
| 2923 | { |
| 2924 | struct ppc_elf_link_hash_table *htab; |
| 2925 | asection *s; |
| 2926 | bfd_boolean relocs; |
| 2927 | bfd *ibfd; |
| 2928 | |
| 2929 | #ifdef DEBUG |
| 2930 | fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); |
| 2931 | #endif |
| 2932 | |
| 2933 | htab = ppc_elf_hash_table (info); |
| 2934 | BFD_ASSERT (htab->elf.dynobj != NULL); |
| 2935 | |
| 2936 | if (elf_hash_table (info)->dynamic_sections_created) |
| 2937 | { |
| 2938 | /* Set the contents of the .interp section to the interpreter. */ |
| 2939 | if (! info->shared) |
| 2940 | { |
| 2941 | s = bfd_get_section_by_name (htab->elf.dynobj, ".interp"); |
| 2942 | BFD_ASSERT (s != NULL); |
| 2943 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 2944 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 2945 | } |
| 2946 | } |
| 2947 | |
| 2948 | if (htab->tlsld_got.refcount > 0) |
| 2949 | { |
| 2950 | htab->tlsld_got.offset = htab->got->_raw_size; |
| 2951 | htab->got->_raw_size += 8; |
| 2952 | if (info->shared) |
| 2953 | htab->relgot->_raw_size += sizeof (Elf32_External_Rela); |
| 2954 | } |
| 2955 | else |
| 2956 | htab->tlsld_got.offset = (bfd_vma) -1; |
| 2957 | |
| 2958 | /* Set up .got offsets for local syms, and space for local dynamic |
| 2959 | relocs. */ |
| 2960 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 2961 | { |
| 2962 | bfd_signed_vma *local_got; |
| 2963 | bfd_signed_vma *end_local_got; |
| 2964 | char *lgot_masks; |
| 2965 | bfd_size_type locsymcount; |
| 2966 | Elf_Internal_Shdr *symtab_hdr; |
| 2967 | asection *srel; |
| 2968 | |
| 2969 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
| 2970 | continue; |
| 2971 | |
| 2972 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 2973 | { |
| 2974 | struct ppc_elf_dyn_relocs *p; |
| 2975 | |
| 2976 | for (p = ((struct ppc_elf_dyn_relocs *) |
| 2977 | elf_section_data (s)->local_dynrel); |
| 2978 | p != NULL; |
| 2979 | p = p->next) |
| 2980 | { |
| 2981 | if (!bfd_is_abs_section (p->sec) |
| 2982 | && bfd_is_abs_section (p->sec->output_section)) |
| 2983 | { |
| 2984 | /* Input section has been discarded, either because |
| 2985 | it is a copy of a linkonce section or due to |
| 2986 | linker script /DISCARD/, so we'll be discarding |
| 2987 | the relocs too. */ |
| 2988 | } |
| 2989 | else if (p->count != 0) |
| 2990 | { |
| 2991 | elf_section_data (p->sec)->sreloc->_raw_size |
| 2992 | += p->count * sizeof (Elf32_External_Rela); |
| 2993 | if ((p->sec->output_section->flags |
| 2994 | & (SEC_READONLY | SEC_ALLOC)) |
| 2995 | == (SEC_READONLY | SEC_ALLOC)) |
| 2996 | info->flags |= DF_TEXTREL; |
| 2997 | } |
| 2998 | } |
| 2999 | } |
| 3000 | |
| 3001 | local_got = elf_local_got_refcounts (ibfd); |
| 3002 | if (!local_got) |
| 3003 | continue; |
| 3004 | |
| 3005 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 3006 | locsymcount = symtab_hdr->sh_info; |
| 3007 | end_local_got = local_got + locsymcount; |
| 3008 | lgot_masks = (char *) end_local_got; |
| 3009 | s = htab->got; |
| 3010 | srel = htab->relgot; |
| 3011 | for (; local_got < end_local_got; ++local_got, ++lgot_masks) |
| 3012 | if (*local_got > 0) |
| 3013 | { |
| 3014 | if (*lgot_masks == (TLS_TLS | TLS_LD)) |
| 3015 | { |
| 3016 | /* If just an LD reloc, we'll just use |
| 3017 | htab->tlsld_got.offset. */ |
| 3018 | if (htab->tlsld_got.offset == (bfd_vma) -1) |
| 3019 | { |
| 3020 | htab->tlsld_got.offset = s->_raw_size; |
| 3021 | s->_raw_size += 8; |
| 3022 | if (info->shared) |
| 3023 | srel->_raw_size += sizeof (Elf32_External_Rela); |
| 3024 | } |
| 3025 | *local_got = (bfd_vma) -1; |
| 3026 | } |
| 3027 | else |
| 3028 | { |
| 3029 | *local_got = s->_raw_size; |
| 3030 | if ((*lgot_masks & TLS_TLS) != 0) |
| 3031 | { |
| 3032 | if ((*lgot_masks & TLS_GD) != 0) |
| 3033 | s->_raw_size += 8; |
| 3034 | if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0) |
| 3035 | s->_raw_size += 4; |
| 3036 | if ((*lgot_masks & TLS_DTPREL) != 0) |
| 3037 | s->_raw_size += 4; |
| 3038 | } |
| 3039 | else |
| 3040 | s->_raw_size += 4; |
| 3041 | if (info->shared) |
| 3042 | srel->_raw_size += ((s->_raw_size - *local_got) / 4 |
| 3043 | * sizeof (Elf32_External_Rela)); |
| 3044 | } |
| 3045 | } |
| 3046 | else |
| 3047 | *local_got = (bfd_vma) -1; |
| 3048 | } |
| 3049 | |
| 3050 | /* Allocate space for global sym dynamic relocs. */ |
| 3051 | elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); |
| 3052 | |
| 3053 | /* We've now determined the sizes of the various dynamic sections. |
| 3054 | Allocate memory for them. */ |
| 3055 | relocs = FALSE; |
| 3056 | for (s = htab->elf.dynobj->sections; s != NULL; s = s->next) |
| 3057 | { |
| 3058 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 3059 | continue; |
| 3060 | |
| 3061 | if (s == htab->plt |
| 3062 | || s == htab->got |
| 3063 | || (htab->sdata != NULL && s == htab->sdata->section) |
| 3064 | || (htab->sdata2 != NULL && s == htab->sdata2->section)) |
| 3065 | { |
| 3066 | /* Strip this section if we don't need it; see the |
| 3067 | comment below. */ |
| 3068 | } |
| 3069 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) |
| 3070 | { |
| 3071 | if (s->_raw_size == 0) |
| 3072 | { |
| 3073 | /* If we don't need this section, strip it from the |
| 3074 | output file. This is mostly to handle .rela.bss and |
| 3075 | .rela.plt. We must create both sections in |
| 3076 | create_dynamic_sections, because they must be created |
| 3077 | before the linker maps input sections to output |
| 3078 | sections. The linker does that before |
| 3079 | adjust_dynamic_symbol is called, and it is that |
| 3080 | function which decides whether anything needs to go |
| 3081 | into these sections. */ |
| 3082 | } |
| 3083 | else |
| 3084 | { |
| 3085 | /* Remember whether there are any relocation sections. */ |
| 3086 | relocs = TRUE; |
| 3087 | |
| 3088 | /* We use the reloc_count field as a counter if we need |
| 3089 | to copy relocs into the output file. */ |
| 3090 | s->reloc_count = 0; |
| 3091 | } |
| 3092 | } |
| 3093 | else |
| 3094 | { |
| 3095 | /* It's not one of our sections, so don't allocate space. */ |
| 3096 | continue; |
| 3097 | } |
| 3098 | |
| 3099 | if (s->_raw_size == 0) |
| 3100 | { |
| 3101 | _bfd_strip_section_from_output (info, s); |
| 3102 | continue; |
| 3103 | } |
| 3104 | |
| 3105 | /* Allocate memory for the section contents. */ |
| 3106 | s->contents = (bfd_byte *) bfd_zalloc (htab->elf.dynobj, s->_raw_size); |
| 3107 | if (s->contents == NULL) |
| 3108 | return FALSE; |
| 3109 | } |
| 3110 | |
| 3111 | if (htab->elf.dynamic_sections_created) |
| 3112 | { |
| 3113 | /* Add some entries to the .dynamic section. We fill in the |
| 3114 | values later, in ppc_elf_finish_dynamic_sections, but we |
| 3115 | must add the entries now so that we get the correct size for |
| 3116 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 3117 | dynamic linker and used by the debugger. */ |
| 3118 | #define add_dynamic_entry(TAG, VAL) \ |
| 3119 | bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) |
| 3120 | |
| 3121 | if (!info->shared) |
| 3122 | { |
| 3123 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 3124 | return FALSE; |
| 3125 | } |
| 3126 | |
| 3127 | if (htab->plt != NULL && htab->plt->_raw_size != 0) |
| 3128 | { |
| 3129 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 3130 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 3131 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 3132 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 3133 | return FALSE; |
| 3134 | } |
| 3135 | |
| 3136 | if (relocs) |
| 3137 | { |
| 3138 | if (!add_dynamic_entry (DT_RELA, 0) |
| 3139 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 3140 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) |
| 3141 | return FALSE; |
| 3142 | } |
| 3143 | |
| 3144 | /* If any dynamic relocs apply to a read-only section, then we |
| 3145 | need a DT_TEXTREL entry. */ |
| 3146 | if ((info->flags & DF_TEXTREL) == 0) |
| 3147 | elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs, |
| 3148 | (PTR) info); |
| 3149 | |
| 3150 | if ((info->flags & DF_TEXTREL) != 0) |
| 3151 | { |
| 3152 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 3153 | return FALSE; |
| 3154 | } |
| 3155 | } |
| 3156 | #undef add_dynamic_entry |
| 3157 | |
| 3158 | return TRUE; |
| 3159 | } |
| 3160 | \f |
| 3161 | static bfd_boolean |
| 3162 | update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type) |
| 3163 | bfd *abfd; |
| 3164 | Elf_Internal_Shdr *symtab_hdr; |
| 3165 | unsigned long r_symndx; |
| 3166 | int tls_type; |
| 3167 | { |
| 3168 | bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); |
| 3169 | char *local_got_tls_masks; |
| 3170 | |
| 3171 | if (local_got_refcounts == NULL) |
| 3172 | { |
| 3173 | bfd_size_type size = symtab_hdr->sh_info; |
| 3174 | |
| 3175 | size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks); |
| 3176 | local_got_refcounts = (bfd_signed_vma *) bfd_zalloc (abfd, size); |
| 3177 | if (local_got_refcounts == NULL) |
| 3178 | return FALSE; |
| 3179 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 3180 | } |
| 3181 | |
| 3182 | local_got_refcounts[r_symndx] += 1; |
| 3183 | local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info); |
| 3184 | local_got_tls_masks[r_symndx] |= tls_type; |
| 3185 | return TRUE; |
| 3186 | } |
| 3187 | |
| 3188 | static void |
| 3189 | bad_shared_reloc (abfd, r_type) |
| 3190 | bfd *abfd; |
| 3191 | enum elf_ppc_reloc_type r_type; |
| 3192 | { |
| 3193 | (*_bfd_error_handler) |
| 3194 | (_("%s: relocation %s cannot be used when making a shared object"), |
| 3195 | bfd_archive_filename (abfd), |
| 3196 | ppc_elf_howto_table[(int) r_type]->name); |
| 3197 | bfd_set_error (bfd_error_bad_value); |
| 3198 | } |
| 3199 | |
| 3200 | /* Look through the relocs for a section during the first phase, and |
| 3201 | allocate space in the global offset table or procedure linkage |
| 3202 | table. */ |
| 3203 | |
| 3204 | static bfd_boolean |
| 3205 | ppc_elf_check_relocs (abfd, info, sec, relocs) |
| 3206 | bfd *abfd; |
| 3207 | struct bfd_link_info *info; |
| 3208 | asection *sec; |
| 3209 | const Elf_Internal_Rela *relocs; |
| 3210 | { |
| 3211 | struct ppc_elf_link_hash_table *htab; |
| 3212 | Elf_Internal_Shdr *symtab_hdr; |
| 3213 | struct elf_link_hash_entry **sym_hashes; |
| 3214 | const Elf_Internal_Rela *rel; |
| 3215 | const Elf_Internal_Rela *rel_end; |
| 3216 | asection *sreloc; |
| 3217 | |
| 3218 | if (info->relocateable) |
| 3219 | return TRUE; |
| 3220 | |
| 3221 | #ifdef DEBUG |
| 3222 | fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n", |
| 3223 | bfd_get_section_name (abfd, sec), |
| 3224 | bfd_archive_filename (abfd)); |
| 3225 | #endif |
| 3226 | |
| 3227 | /* Create the linker generated sections all the time so that the |
| 3228 | special symbols are created. */ |
| 3229 | |
| 3230 | htab = ppc_elf_hash_table (info); |
| 3231 | if (htab->sdata == NULL) |
| 3232 | { |
| 3233 | htab->sdata = elf_linker_section (abfd, LINKER_SECTION_SDATA); |
| 3234 | if (htab->sdata == NULL) |
| 3235 | htab->sdata = ppc_elf_create_linker_section (abfd, info, |
| 3236 | LINKER_SECTION_SDATA); |
| 3237 | if (htab->sdata == NULL) |
| 3238 | return FALSE; |
| 3239 | } |
| 3240 | |
| 3241 | if (htab->sdata2 == NULL) |
| 3242 | { |
| 3243 | htab->sdata2 = elf_linker_section (abfd, LINKER_SECTION_SDATA2); |
| 3244 | if (htab->sdata2 == NULL) |
| 3245 | htab->sdata2 = ppc_elf_create_linker_section (abfd, info, |
| 3246 | LINKER_SECTION_SDATA2); |
| 3247 | if (htab->sdata2 == NULL) |
| 3248 | return FALSE; |
| 3249 | } |
| 3250 | |
| 3251 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 3252 | sym_hashes = elf_sym_hashes (abfd); |
| 3253 | sreloc = NULL; |
| 3254 | |
| 3255 | rel_end = relocs + sec->reloc_count; |
| 3256 | for (rel = relocs; rel < rel_end; rel++) |
| 3257 | { |
| 3258 | unsigned long r_symndx; |
| 3259 | enum elf_ppc_reloc_type r_type; |
| 3260 | struct elf_link_hash_entry *h; |
| 3261 | int tls_type = 0; |
| 3262 | |
| 3263 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 3264 | if (r_symndx < symtab_hdr->sh_info) |
| 3265 | h = NULL; |
| 3266 | else |
| 3267 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3268 | |
| 3269 | /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. |
| 3270 | This shows up in particular in an R_PPC_ADDR32 in the eabi |
| 3271 | startup code. */ |
| 3272 | if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 3273 | { |
| 3274 | if (htab->got == NULL) |
| 3275 | { |
| 3276 | if (htab->elf.dynobj == NULL) |
| 3277 | htab->elf.dynobj = abfd; |
| 3278 | if (!ppc_elf_create_got (htab->elf.dynobj, info)) |
| 3279 | return FALSE; |
| 3280 | } |
| 3281 | } |
| 3282 | |
| 3283 | r_type = (enum elf_ppc_reloc_type) ELF32_R_TYPE (rel->r_info); |
| 3284 | switch (r_type) |
| 3285 | { |
| 3286 | case R_PPC_GOT_TLSLD16: |
| 3287 | case R_PPC_GOT_TLSLD16_LO: |
| 3288 | case R_PPC_GOT_TLSLD16_HI: |
| 3289 | case R_PPC_GOT_TLSLD16_HA: |
| 3290 | htab->tlsld_got.refcount += 1; |
| 3291 | tls_type = TLS_TLS | TLS_LD; |
| 3292 | goto dogottls; |
| 3293 | |
| 3294 | case R_PPC_GOT_TLSGD16: |
| 3295 | case R_PPC_GOT_TLSGD16_LO: |
| 3296 | case R_PPC_GOT_TLSGD16_HI: |
| 3297 | case R_PPC_GOT_TLSGD16_HA: |
| 3298 | tls_type = TLS_TLS | TLS_GD; |
| 3299 | goto dogottls; |
| 3300 | |
| 3301 | case R_PPC_GOT_TPREL16: |
| 3302 | case R_PPC_GOT_TPREL16_LO: |
| 3303 | case R_PPC_GOT_TPREL16_HI: |
| 3304 | case R_PPC_GOT_TPREL16_HA: |
| 3305 | if (info->shared) |
| 3306 | info->flags |= DF_STATIC_TLS; |
| 3307 | tls_type = TLS_TLS | TLS_TPREL; |
| 3308 | goto dogottls; |
| 3309 | |
| 3310 | case R_PPC_GOT_DTPREL16: |
| 3311 | case R_PPC_GOT_DTPREL16_LO: |
| 3312 | case R_PPC_GOT_DTPREL16_HI: |
| 3313 | case R_PPC_GOT_DTPREL16_HA: |
| 3314 | tls_type = TLS_TLS | TLS_DTPREL; |
| 3315 | dogottls: |
| 3316 | sec->has_tls_reloc = 1; |
| 3317 | /* Fall thru */ |
| 3318 | |
| 3319 | /* GOT16 relocations */ |
| 3320 | case R_PPC_GOT16: |
| 3321 | case R_PPC_GOT16_LO: |
| 3322 | case R_PPC_GOT16_HI: |
| 3323 | case R_PPC_GOT16_HA: |
| 3324 | /* This symbol requires a global offset table entry. */ |
| 3325 | if (htab->got == NULL) |
| 3326 | { |
| 3327 | if (htab->elf.dynobj == NULL) |
| 3328 | htab->elf.dynobj = abfd; |
| 3329 | if (!ppc_elf_create_got (htab->elf.dynobj, info)) |
| 3330 | return FALSE; |
| 3331 | } |
| 3332 | if (h != NULL) |
| 3333 | { |
| 3334 | h->got.refcount += 1; |
| 3335 | ppc_elf_hash_entry (h)->tls_mask |= tls_type; |
| 3336 | } |
| 3337 | else |
| 3338 | /* This is a global offset table entry for a local symbol. */ |
| 3339 | if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)) |
| 3340 | return FALSE; |
| 3341 | break; |
| 3342 | |
| 3343 | /* Indirect .sdata relocation. */ |
| 3344 | case R_PPC_EMB_SDAI16: |
| 3345 | if (info->shared) |
| 3346 | { |
| 3347 | bad_shared_reloc (abfd, r_type); |
| 3348 | return FALSE; |
| 3349 | } |
| 3350 | if (!bfd_elf32_create_pointer_linker_section (abfd, info, |
| 3351 | htab->sdata, h, rel)) |
| 3352 | return FALSE; |
| 3353 | break; |
| 3354 | |
| 3355 | /* Indirect .sdata2 relocation. */ |
| 3356 | case R_PPC_EMB_SDA2I16: |
| 3357 | if (info->shared) |
| 3358 | { |
| 3359 | bad_shared_reloc (abfd, r_type); |
| 3360 | return FALSE; |
| 3361 | } |
| 3362 | if (!bfd_elf32_create_pointer_linker_section (abfd, info, |
| 3363 | htab->sdata2, h, rel)) |
| 3364 | return FALSE; |
| 3365 | break; |
| 3366 | |
| 3367 | case R_PPC_SDAREL16: |
| 3368 | case R_PPC_EMB_SDA2REL: |
| 3369 | case R_PPC_EMB_SDA21: |
| 3370 | case R_PPC_EMB_RELSDA: |
| 3371 | case R_PPC_EMB_NADDR32: |
| 3372 | case R_PPC_EMB_NADDR16: |
| 3373 | case R_PPC_EMB_NADDR16_LO: |
| 3374 | case R_PPC_EMB_NADDR16_HI: |
| 3375 | case R_PPC_EMB_NADDR16_HA: |
| 3376 | if (info->shared) |
| 3377 | { |
| 3378 | bad_shared_reloc (abfd, r_type); |
| 3379 | return FALSE; |
| 3380 | } |
| 3381 | break; |
| 3382 | |
| 3383 | case R_PPC_PLT32: |
| 3384 | case R_PPC_PLTREL24: |
| 3385 | case R_PPC_PLTREL32: |
| 3386 | case R_PPC_PLT16_LO: |
| 3387 | case R_PPC_PLT16_HI: |
| 3388 | case R_PPC_PLT16_HA: |
| 3389 | #ifdef DEBUG |
| 3390 | fprintf (stderr, "Reloc requires a PLT entry\n"); |
| 3391 | #endif |
| 3392 | /* This symbol requires a procedure linkage table entry. We |
| 3393 | actually build the entry in finish_dynamic_symbol, |
| 3394 | because this might be a case of linking PIC code without |
| 3395 | linking in any dynamic objects, in which case we don't |
| 3396 | need to generate a procedure linkage table after all. */ |
| 3397 | |
| 3398 | if (h == NULL) |
| 3399 | { |
| 3400 | /* It does not make sense to have a procedure linkage |
| 3401 | table entry for a local symbol. */ |
| 3402 | bfd_set_error (bfd_error_bad_value); |
| 3403 | return FALSE; |
| 3404 | } |
| 3405 | |
| 3406 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 3407 | h->plt.refcount++; |
| 3408 | break; |
| 3409 | |
| 3410 | /* The following relocations don't need to propagate the |
| 3411 | relocation if linking a shared object since they are |
| 3412 | section relative. */ |
| 3413 | case R_PPC_SECTOFF: |
| 3414 | case R_PPC_SECTOFF_LO: |
| 3415 | case R_PPC_SECTOFF_HI: |
| 3416 | case R_PPC_SECTOFF_HA: |
| 3417 | case R_PPC_DTPREL16: |
| 3418 | case R_PPC_DTPREL16_LO: |
| 3419 | case R_PPC_DTPREL16_HI: |
| 3420 | case R_PPC_DTPREL16_HA: |
| 3421 | case R_PPC_TOC16: |
| 3422 | break; |
| 3423 | |
| 3424 | /* This are just markers. */ |
| 3425 | case R_PPC_TLS: |
| 3426 | case R_PPC_EMB_MRKREF: |
| 3427 | case R_PPC_NONE: |
| 3428 | case R_PPC_max: |
| 3429 | break; |
| 3430 | |
| 3431 | /* These should only appear in dynamic objects. */ |
| 3432 | case R_PPC_COPY: |
| 3433 | case R_PPC_GLOB_DAT: |
| 3434 | case R_PPC_JMP_SLOT: |
| 3435 | case R_PPC_RELATIVE: |
| 3436 | break; |
| 3437 | |
| 3438 | /* These aren't handled yet. We'll report an error later. */ |
| 3439 | case R_PPC_ADDR30: |
| 3440 | case R_PPC_EMB_RELSEC16: |
| 3441 | case R_PPC_EMB_RELST_LO: |
| 3442 | case R_PPC_EMB_RELST_HI: |
| 3443 | case R_PPC_EMB_RELST_HA: |
| 3444 | case R_PPC_EMB_BIT_FLD: |
| 3445 | break; |
| 3446 | |
| 3447 | /* This refers only to functions defined in the shared library. */ |
| 3448 | case R_PPC_LOCAL24PC: |
| 3449 | break; |
| 3450 | |
| 3451 | /* This relocation describes the C++ object vtable hierarchy. |
| 3452 | Reconstruct it for later use during GC. */ |
| 3453 | case R_PPC_GNU_VTINHERIT: |
| 3454 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 3455 | return FALSE; |
| 3456 | break; |
| 3457 | |
| 3458 | /* This relocation describes which C++ vtable entries are actually |
| 3459 | used. Record for later use during GC. */ |
| 3460 | case R_PPC_GNU_VTENTRY: |
| 3461 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 3462 | return FALSE; |
| 3463 | break; |
| 3464 | |
| 3465 | /* We shouldn't really be seeing these. */ |
| 3466 | case R_PPC_TPREL32: |
| 3467 | if (info->shared) |
| 3468 | info->flags |= DF_STATIC_TLS; |
| 3469 | goto dodyn; |
| 3470 | |
| 3471 | /* Nor these. */ |
| 3472 | case R_PPC_DTPMOD32: |
| 3473 | case R_PPC_DTPREL32: |
| 3474 | goto dodyn; |
| 3475 | |
| 3476 | case R_PPC_TPREL16: |
| 3477 | case R_PPC_TPREL16_LO: |
| 3478 | case R_PPC_TPREL16_HI: |
| 3479 | case R_PPC_TPREL16_HA: |
| 3480 | if (info->shared) |
| 3481 | info->flags |= DF_STATIC_TLS; |
| 3482 | goto dodyn; |
| 3483 | |
| 3484 | /* When creating a shared object, we must copy these |
| 3485 | relocs into the output file. We create a reloc |
| 3486 | section in dynobj and make room for the reloc. */ |
| 3487 | case R_PPC_REL24: |
| 3488 | case R_PPC_REL14: |
| 3489 | case R_PPC_REL14_BRTAKEN: |
| 3490 | case R_PPC_REL14_BRNTAKEN: |
| 3491 | case R_PPC_REL32: |
| 3492 | if (h == NULL |
| 3493 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 3494 | break; |
| 3495 | /* fall through */ |
| 3496 | |
| 3497 | case R_PPC_ADDR32: |
| 3498 | case R_PPC_ADDR24: |
| 3499 | case R_PPC_ADDR16: |
| 3500 | case R_PPC_ADDR16_LO: |
| 3501 | case R_PPC_ADDR16_HI: |
| 3502 | case R_PPC_ADDR16_HA: |
| 3503 | case R_PPC_ADDR14: |
| 3504 | case R_PPC_ADDR14_BRTAKEN: |
| 3505 | case R_PPC_ADDR14_BRNTAKEN: |
| 3506 | case R_PPC_UADDR32: |
| 3507 | case R_PPC_UADDR16: |
| 3508 | if (h != NULL && !info->shared) |
| 3509 | { |
| 3510 | /* We may need a plt entry if the symbol turns out to be |
| 3511 | a function defined in a dynamic object. */ |
| 3512 | h->plt.refcount++; |
| 3513 | |
| 3514 | /* We may need a copy reloc too. */ |
| 3515 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; |
| 3516 | } |
| 3517 | |
| 3518 | dodyn: |
| 3519 | /* If we are creating a shared library, and this is a reloc |
| 3520 | against a global symbol, or a non PC relative reloc |
| 3521 | against a local symbol, then we need to copy the reloc |
| 3522 | into the shared library. However, if we are linking with |
| 3523 | -Bsymbolic, we do not need to copy a reloc against a |
| 3524 | global symbol which is defined in an object we are |
| 3525 | including in the link (i.e., DEF_REGULAR is set). At |
| 3526 | this point we have not seen all the input files, so it is |
| 3527 | possible that DEF_REGULAR is not set now but will be set |
| 3528 | later (it is never cleared). In case of a weak definition, |
| 3529 | DEF_REGULAR may be cleared later by a strong definition in |
| 3530 | a shared library. We account for that possibility below by |
| 3531 | storing information in the dyn_relocs field of the hash |
| 3532 | table entry. A similar situation occurs when creating |
| 3533 | shared libraries and symbol visibility changes render the |
| 3534 | symbol local. |
| 3535 | |
| 3536 | If on the other hand, we are creating an executable, we |
| 3537 | may need to keep relocations for symbols satisfied by a |
| 3538 | dynamic library if we manage to avoid copy relocs for the |
| 3539 | symbol. */ |
| 3540 | if ((info->shared |
| 3541 | && (MUST_BE_DYN_RELOC (r_type) |
| 3542 | || (h != NULL |
| 3543 | && (! info->symbolic |
| 3544 | || h->root.type == bfd_link_hash_defweak |
| 3545 | || (h->elf_link_hash_flags |
| 3546 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) |
| 3547 | || (ELIMINATE_COPY_RELOCS |
| 3548 | && !info->shared |
| 3549 | && (sec->flags & SEC_ALLOC) != 0 |
| 3550 | && h != NULL |
| 3551 | && (h->root.type == bfd_link_hash_defweak |
| 3552 | || (h->elf_link_hash_flags |
| 3553 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) |
| 3554 | { |
| 3555 | struct ppc_elf_dyn_relocs *p; |
| 3556 | struct ppc_elf_dyn_relocs **head; |
| 3557 | |
| 3558 | #ifdef DEBUG |
| 3559 | fprintf (stderr, "ppc_elf_check_relocs need to create relocation for %s\n", |
| 3560 | (h && h->root.root.string |
| 3561 | ? h->root.root.string : "<unknown>")); |
| 3562 | #endif |
| 3563 | if (sreloc == NULL) |
| 3564 | { |
| 3565 | const char *name; |
| 3566 | |
| 3567 | name = (bfd_elf_string_from_elf_section |
| 3568 | (abfd, |
| 3569 | elf_elfheader (abfd)->e_shstrndx, |
| 3570 | elf_section_data (sec)->rel_hdr.sh_name)); |
| 3571 | if (name == NULL) |
| 3572 | return FALSE; |
| 3573 | |
| 3574 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 3575 | && strcmp (bfd_get_section_name (abfd, sec), |
| 3576 | name + 5) == 0); |
| 3577 | |
| 3578 | sreloc = bfd_get_section_by_name (htab->elf.dynobj, name); |
| 3579 | if (sreloc == NULL) |
| 3580 | { |
| 3581 | flagword flags; |
| 3582 | |
| 3583 | sreloc = bfd_make_section (htab->elf.dynobj, name); |
| 3584 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
| 3585 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 3586 | if ((sec->flags & SEC_ALLOC) != 0) |
| 3587 | flags |= SEC_ALLOC | SEC_LOAD; |
| 3588 | if (sreloc == NULL |
| 3589 | || ! bfd_set_section_flags (htab->elf.dynobj, |
| 3590 | sreloc, flags) |
| 3591 | || ! bfd_set_section_alignment (htab->elf.dynobj, |
| 3592 | sreloc, 2)) |
| 3593 | return FALSE; |
| 3594 | } |
| 3595 | elf_section_data (sec)->sreloc = sreloc; |
| 3596 | } |
| 3597 | |
| 3598 | /* If this is a global symbol, we count the number of |
| 3599 | relocations we need for this symbol. */ |
| 3600 | if (h != NULL) |
| 3601 | { |
| 3602 | head = &ppc_elf_hash_entry (h)->dyn_relocs; |
| 3603 | } |
| 3604 | else |
| 3605 | { |
| 3606 | /* Track dynamic relocs needed for local syms too. |
| 3607 | We really need local syms available to do this |
| 3608 | easily. Oh well. */ |
| 3609 | |
| 3610 | asection *s; |
| 3611 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, |
| 3612 | sec, r_symndx); |
| 3613 | if (s == NULL) |
| 3614 | return FALSE; |
| 3615 | |
| 3616 | head = ((struct ppc_elf_dyn_relocs **) |
| 3617 | &elf_section_data (s)->local_dynrel); |
| 3618 | } |
| 3619 | |
| 3620 | p = *head; |
| 3621 | if (p == NULL || p->sec != sec) |
| 3622 | { |
| 3623 | p = ((struct ppc_elf_dyn_relocs *) |
| 3624 | bfd_alloc (htab->elf.dynobj, sizeof *p)); |
| 3625 | if (p == NULL) |
| 3626 | return FALSE; |
| 3627 | p->next = *head; |
| 3628 | *head = p; |
| 3629 | p->sec = sec; |
| 3630 | p->count = 0; |
| 3631 | p->pc_count = 0; |
| 3632 | } |
| 3633 | |
| 3634 | p->count += 1; |
| 3635 | if (!MUST_BE_DYN_RELOC (r_type)) |
| 3636 | p->pc_count += 1; |
| 3637 | } |
| 3638 | |
| 3639 | break; |
| 3640 | } |
| 3641 | } |
| 3642 | |
| 3643 | return TRUE; |
| 3644 | } |
| 3645 | |
| 3646 | /* Return the section that should be marked against GC for a given |
| 3647 | relocation. */ |
| 3648 | |
| 3649 | static asection * |
| 3650 | ppc_elf_gc_mark_hook (sec, info, rel, h, sym) |
| 3651 | asection *sec; |
| 3652 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 3653 | Elf_Internal_Rela *rel; |
| 3654 | struct elf_link_hash_entry *h; |
| 3655 | Elf_Internal_Sym *sym; |
| 3656 | { |
| 3657 | if (h != NULL) |
| 3658 | { |
| 3659 | switch (ELF32_R_TYPE (rel->r_info)) |
| 3660 | { |
| 3661 | case R_PPC_GNU_VTINHERIT: |
| 3662 | case R_PPC_GNU_VTENTRY: |
| 3663 | break; |
| 3664 | |
| 3665 | default: |
| 3666 | switch (h->root.type) |
| 3667 | { |
| 3668 | case bfd_link_hash_defined: |
| 3669 | case bfd_link_hash_defweak: |
| 3670 | return h->root.u.def.section; |
| 3671 | |
| 3672 | case bfd_link_hash_common: |
| 3673 | return h->root.u.c.p->section; |
| 3674 | |
| 3675 | default: |
| 3676 | break; |
| 3677 | } |
| 3678 | } |
| 3679 | } |
| 3680 | else |
| 3681 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| 3682 | |
| 3683 | return NULL; |
| 3684 | } |
| 3685 | |
| 3686 | /* Update the got, plt and dynamic reloc reference counts for the |
| 3687 | section being removed. */ |
| 3688 | |
| 3689 | static bfd_boolean |
| 3690 | ppc_elf_gc_sweep_hook (abfd, info, sec, relocs) |
| 3691 | bfd *abfd; |
| 3692 | struct bfd_link_info *info; |
| 3693 | asection *sec; |
| 3694 | const Elf_Internal_Rela *relocs; |
| 3695 | { |
| 3696 | struct ppc_elf_link_hash_table *htab; |
| 3697 | Elf_Internal_Shdr *symtab_hdr; |
| 3698 | struct elf_link_hash_entry **sym_hashes; |
| 3699 | bfd_signed_vma *local_got_refcounts; |
| 3700 | const Elf_Internal_Rela *rel, *relend; |
| 3701 | |
| 3702 | elf_section_data (sec)->local_dynrel = NULL; |
| 3703 | |
| 3704 | htab = ppc_elf_hash_table (info); |
| 3705 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 3706 | sym_hashes = elf_sym_hashes (abfd); |
| 3707 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 3708 | |
| 3709 | relend = relocs + sec->reloc_count; |
| 3710 | for (rel = relocs; rel < relend; rel++) |
| 3711 | { |
| 3712 | unsigned long r_symndx; |
| 3713 | enum elf_ppc_reloc_type r_type; |
| 3714 | struct elf_link_hash_entry *h = NULL; |
| 3715 | |
| 3716 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 3717 | if (r_symndx >= symtab_hdr->sh_info) |
| 3718 | { |
| 3719 | struct ppc_elf_dyn_relocs **pp, *p; |
| 3720 | struct ppc_elf_link_hash_entry *eh; |
| 3721 | |
| 3722 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3723 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 3724 | |
| 3725 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
| 3726 | if (p->sec == sec) |
| 3727 | { |
| 3728 | /* Everything must go for SEC. */ |
| 3729 | *pp = p->next; |
| 3730 | break; |
| 3731 | } |
| 3732 | } |
| 3733 | |
| 3734 | r_type = (enum elf_ppc_reloc_type) ELF32_R_TYPE (rel->r_info); |
| 3735 | switch (r_type) |
| 3736 | { |
| 3737 | case R_PPC_GOT_TLSLD16: |
| 3738 | case R_PPC_GOT_TLSLD16_LO: |
| 3739 | case R_PPC_GOT_TLSLD16_HI: |
| 3740 | case R_PPC_GOT_TLSLD16_HA: |
| 3741 | htab->tlsld_got.refcount -= 1; |
| 3742 | /* Fall thru */ |
| 3743 | |
| 3744 | case R_PPC_GOT_TLSGD16: |
| 3745 | case R_PPC_GOT_TLSGD16_LO: |
| 3746 | case R_PPC_GOT_TLSGD16_HI: |
| 3747 | case R_PPC_GOT_TLSGD16_HA: |
| 3748 | case R_PPC_GOT_TPREL16: |
| 3749 | case R_PPC_GOT_TPREL16_LO: |
| 3750 | case R_PPC_GOT_TPREL16_HI: |
| 3751 | case R_PPC_GOT_TPREL16_HA: |
| 3752 | case R_PPC_GOT_DTPREL16: |
| 3753 | case R_PPC_GOT_DTPREL16_LO: |
| 3754 | case R_PPC_GOT_DTPREL16_HI: |
| 3755 | case R_PPC_GOT_DTPREL16_HA: |
| 3756 | case R_PPC_GOT16: |
| 3757 | case R_PPC_GOT16_LO: |
| 3758 | case R_PPC_GOT16_HI: |
| 3759 | case R_PPC_GOT16_HA: |
| 3760 | if (h != NULL) |
| 3761 | { |
| 3762 | if (h->got.refcount > 0) |
| 3763 | h->got.refcount--; |
| 3764 | } |
| 3765 | else if (local_got_refcounts != NULL) |
| 3766 | { |
| 3767 | if (local_got_refcounts[r_symndx] > 0) |
| 3768 | local_got_refcounts[r_symndx]--; |
| 3769 | } |
| 3770 | break; |
| 3771 | |
| 3772 | case R_PPC_REL24: |
| 3773 | case R_PPC_REL14: |
| 3774 | case R_PPC_REL14_BRTAKEN: |
| 3775 | case R_PPC_REL14_BRNTAKEN: |
| 3776 | case R_PPC_REL32: |
| 3777 | if (h == NULL |
| 3778 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 3779 | break; |
| 3780 | /* Fall thru */ |
| 3781 | |
| 3782 | case R_PPC_ADDR32: |
| 3783 | case R_PPC_ADDR24: |
| 3784 | case R_PPC_ADDR16: |
| 3785 | case R_PPC_ADDR16_LO: |
| 3786 | case R_PPC_ADDR16_HI: |
| 3787 | case R_PPC_ADDR16_HA: |
| 3788 | case R_PPC_ADDR14: |
| 3789 | case R_PPC_ADDR14_BRTAKEN: |
| 3790 | case R_PPC_ADDR14_BRNTAKEN: |
| 3791 | case R_PPC_UADDR32: |
| 3792 | case R_PPC_UADDR16: |
| 3793 | case R_PPC_PLT32: |
| 3794 | case R_PPC_PLTREL24: |
| 3795 | case R_PPC_PLT16_LO: |
| 3796 | case R_PPC_PLT16_HI: |
| 3797 | case R_PPC_PLT16_HA: |
| 3798 | if (h != NULL) |
| 3799 | { |
| 3800 | if (h->plt.refcount > 0) |
| 3801 | h->plt.refcount--; |
| 3802 | } |
| 3803 | break; |
| 3804 | |
| 3805 | default: |
| 3806 | break; |
| 3807 | } |
| 3808 | } |
| 3809 | return TRUE; |
| 3810 | } |
| 3811 | |
| 3812 | /* Set htab->tls_sec and htab->tls_get_addr. */ |
| 3813 | |
| 3814 | bfd_boolean |
| 3815 | ppc_elf_tls_setup (obfd, info) |
| 3816 | bfd *obfd; |
| 3817 | struct bfd_link_info *info; |
| 3818 | { |
| 3819 | asection *tls; |
| 3820 | struct ppc_elf_link_hash_table *htab; |
| 3821 | |
| 3822 | htab = ppc_elf_hash_table (info); |
| 3823 | htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", |
| 3824 | FALSE, FALSE, TRUE); |
| 3825 | |
| 3826 | for (tls = obfd->sections; tls != NULL; tls = tls->next) |
| 3827 | if ((tls->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) |
| 3828 | == (SEC_THREAD_LOCAL | SEC_LOAD)) |
| 3829 | break; |
| 3830 | htab->tls_sec = tls; |
| 3831 | |
| 3832 | return tls != NULL; |
| 3833 | } |
| 3834 | |
| 3835 | /* Run through all the TLS relocs looking for optimization |
| 3836 | opportunities. */ |
| 3837 | |
| 3838 | bfd_boolean |
| 3839 | ppc_elf_tls_optimize (obfd, info) |
| 3840 | bfd *obfd ATTRIBUTE_UNUSED; |
| 3841 | struct bfd_link_info *info; |
| 3842 | { |
| 3843 | bfd *ibfd; |
| 3844 | asection *sec; |
| 3845 | struct ppc_elf_link_hash_table *htab; |
| 3846 | |
| 3847 | if (info->relocateable || info->shared) |
| 3848 | return TRUE; |
| 3849 | |
| 3850 | htab = ppc_elf_hash_table (info); |
| 3851 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 3852 | { |
| 3853 | Elf_Internal_Sym *locsyms = NULL; |
| 3854 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 3855 | |
| 3856 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 3857 | if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) |
| 3858 | { |
| 3859 | Elf_Internal_Rela *relstart, *rel, *relend; |
| 3860 | int expecting_tls_get_addr; |
| 3861 | |
| 3862 | /* Read the relocations. */ |
| 3863 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, (PTR) NULL, |
| 3864 | (Elf_Internal_Rela *) NULL, |
| 3865 | info->keep_memory); |
| 3866 | if (relstart == NULL) |
| 3867 | return FALSE; |
| 3868 | |
| 3869 | expecting_tls_get_addr = 0; |
| 3870 | relend = relstart + sec->reloc_count; |
| 3871 | for (rel = relstart; rel < relend; rel++) |
| 3872 | { |
| 3873 | enum elf_ppc_reloc_type r_type; |
| 3874 | unsigned long r_symndx; |
| 3875 | struct elf_link_hash_entry *h = NULL; |
| 3876 | char *tls_mask; |
| 3877 | char tls_set, tls_clear; |
| 3878 | bfd_boolean is_local; |
| 3879 | |
| 3880 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 3881 | if (r_symndx >= symtab_hdr->sh_info) |
| 3882 | { |
| 3883 | struct elf_link_hash_entry **sym_hashes; |
| 3884 | |
| 3885 | sym_hashes = elf_sym_hashes (ibfd); |
| 3886 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3887 | while (h->root.type == bfd_link_hash_indirect |
| 3888 | || h->root.type == bfd_link_hash_warning) |
| 3889 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 3890 | } |
| 3891 | |
| 3892 | is_local = FALSE; |
| 3893 | if (h == NULL |
| 3894 | || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)) |
| 3895 | is_local = TRUE; |
| 3896 | |
| 3897 | r_type = (enum elf_ppc_reloc_type) ELF32_R_TYPE (rel->r_info); |
| 3898 | switch (r_type) |
| 3899 | { |
| 3900 | case R_PPC_GOT_TLSLD16: |
| 3901 | case R_PPC_GOT_TLSLD16_LO: |
| 3902 | case R_PPC_GOT_TLSLD16_HI: |
| 3903 | case R_PPC_GOT_TLSLD16_HA: |
| 3904 | /* These relocs should never be against a symbol |
| 3905 | defined in a shared lib. Leave them alone if |
| 3906 | that turns out to be the case. */ |
| 3907 | expecting_tls_get_addr = 0; |
| 3908 | htab->tlsld_got.refcount -= 1; |
| 3909 | if (!is_local) |
| 3910 | continue; |
| 3911 | |
| 3912 | /* LD -> LE */ |
| 3913 | tls_set = 0; |
| 3914 | tls_clear = TLS_LD; |
| 3915 | expecting_tls_get_addr = 1; |
| 3916 | break; |
| 3917 | |
| 3918 | case R_PPC_GOT_TLSGD16: |
| 3919 | case R_PPC_GOT_TLSGD16_LO: |
| 3920 | case R_PPC_GOT_TLSGD16_HI: |
| 3921 | case R_PPC_GOT_TLSGD16_HA: |
| 3922 | if (is_local) |
| 3923 | /* GD -> LE */ |
| 3924 | tls_set = 0; |
| 3925 | else |
| 3926 | /* GD -> IE */ |
| 3927 | tls_set = TLS_TLS | TLS_TPRELGD; |
| 3928 | tls_clear = TLS_GD; |
| 3929 | expecting_tls_get_addr = 1; |
| 3930 | break; |
| 3931 | |
| 3932 | case R_PPC_GOT_TPREL16: |
| 3933 | case R_PPC_GOT_TPREL16_LO: |
| 3934 | case R_PPC_GOT_TPREL16_HI: |
| 3935 | case R_PPC_GOT_TPREL16_HA: |
| 3936 | expecting_tls_get_addr = 0; |
| 3937 | if (is_local) |
| 3938 | { |
| 3939 | /* IE -> LE */ |
| 3940 | tls_set = 0; |
| 3941 | tls_clear = TLS_TPREL; |
| 3942 | break; |
| 3943 | } |
| 3944 | else |
| 3945 | continue; |
| 3946 | |
| 3947 | case R_PPC_REL14: |
| 3948 | case R_PPC_REL14_BRTAKEN: |
| 3949 | case R_PPC_REL14_BRNTAKEN: |
| 3950 | case R_PPC_REL24: |
| 3951 | if (expecting_tls_get_addr |
| 3952 | && h != NULL |
| 3953 | && h == htab->tls_get_addr) |
| 3954 | { |
| 3955 | if (h->plt.refcount > 0) |
| 3956 | h->plt.refcount -= 1; |
| 3957 | } |
| 3958 | expecting_tls_get_addr = 0; |
| 3959 | continue; |
| 3960 | |
| 3961 | default: |
| 3962 | expecting_tls_get_addr = 0; |
| 3963 | continue; |
| 3964 | } |
| 3965 | |
| 3966 | if (h != NULL) |
| 3967 | { |
| 3968 | if (tls_set == 0) |
| 3969 | { |
| 3970 | /* We managed to get rid of a got entry. */ |
| 3971 | if (h->got.refcount > 0) |
| 3972 | h->got.refcount -= 1; |
| 3973 | } |
| 3974 | tls_mask = &ppc_elf_hash_entry (h)->tls_mask; |
| 3975 | } |
| 3976 | else |
| 3977 | { |
| 3978 | Elf_Internal_Sym *sym; |
| 3979 | bfd_signed_vma *lgot_refs; |
| 3980 | char *lgot_masks; |
| 3981 | |
| 3982 | if (locsyms == NULL) |
| 3983 | { |
| 3984 | locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 3985 | if (locsyms == NULL) |
| 3986 | locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, |
| 3987 | symtab_hdr->sh_info, |
| 3988 | 0, NULL, NULL, NULL); |
| 3989 | if (locsyms == NULL) |
| 3990 | { |
| 3991 | if (elf_section_data (sec)->relocs != relstart) |
| 3992 | free (relstart); |
| 3993 | return FALSE; |
| 3994 | } |
| 3995 | } |
| 3996 | sym = locsyms + r_symndx; |
| 3997 | lgot_refs = elf_local_got_refcounts (ibfd); |
| 3998 | if (lgot_refs == NULL) |
| 3999 | abort (); |
| 4000 | if (tls_set == 0) |
| 4001 | { |
| 4002 | /* We managed to get rid of a got entry. */ |
| 4003 | if (lgot_refs[r_symndx] > 0) |
| 4004 | lgot_refs[r_symndx] -= 1; |
| 4005 | } |
| 4006 | lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info); |
| 4007 | tls_mask = &lgot_masks[r_symndx]; |
| 4008 | } |
| 4009 | |
| 4010 | *tls_mask |= tls_set; |
| 4011 | *tls_mask &= ~tls_clear; |
| 4012 | } |
| 4013 | |
| 4014 | if (elf_section_data (sec)->relocs != relstart) |
| 4015 | free (relstart); |
| 4016 | } |
| 4017 | |
| 4018 | if (locsyms != NULL |
| 4019 | && (symtab_hdr->contents != (unsigned char *) locsyms)) |
| 4020 | { |
| 4021 | if (!info->keep_memory) |
| 4022 | free (locsyms); |
| 4023 | else |
| 4024 | symtab_hdr->contents = (unsigned char *) locsyms; |
| 4025 | } |
| 4026 | } |
| 4027 | return TRUE; |
| 4028 | } |
| 4029 | \f |
| 4030 | /* Hook called by the linker routine which adds symbols from an object |
| 4031 | file. We use it to put .comm items in .sbss, and not .bss. */ |
| 4032 | |
| 4033 | static bfd_boolean |
| 4034 | ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) |
| 4035 | bfd *abfd; |
| 4036 | struct bfd_link_info *info; |
| 4037 | const Elf_Internal_Sym *sym; |
| 4038 | const char **namep ATTRIBUTE_UNUSED; |
| 4039 | flagword *flagsp ATTRIBUTE_UNUSED; |
| 4040 | asection **secp; |
| 4041 | bfd_vma *valp; |
| 4042 | { |
| 4043 | if (sym->st_shndx == SHN_COMMON |
| 4044 | && !info->relocateable |
| 4045 | && sym->st_size <= elf_gp_size (abfd) |
| 4046 | && info->hash->creator->flavour == bfd_target_elf_flavour) |
| 4047 | { |
| 4048 | /* Common symbols less than or equal to -G nn bytes are automatically |
| 4049 | put into .sdata. */ |
| 4050 | elf_linker_section_t *sdata |
| 4051 | = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA); |
| 4052 | |
| 4053 | if (!sdata->bss_section) |
| 4054 | { |
| 4055 | bfd_size_type amt; |
| 4056 | |
| 4057 | /* We don't go through bfd_make_section, because we don't |
| 4058 | want to attach this common section to DYNOBJ. The linker |
| 4059 | will move the symbols to the appropriate output section |
| 4060 | when it defines common symbols. */ |
| 4061 | amt = sizeof (asection); |
| 4062 | sdata->bss_section = (asection *) bfd_zalloc (abfd, amt); |
| 4063 | if (sdata->bss_section == NULL) |
| 4064 | return FALSE; |
| 4065 | sdata->bss_section->name = sdata->bss_name; |
| 4066 | sdata->bss_section->flags = SEC_IS_COMMON; |
| 4067 | sdata->bss_section->output_section = sdata->bss_section; |
| 4068 | amt = sizeof (asymbol); |
| 4069 | sdata->bss_section->symbol = (asymbol *) bfd_zalloc (abfd, amt); |
| 4070 | amt = sizeof (asymbol *); |
| 4071 | sdata->bss_section->symbol_ptr_ptr = |
| 4072 | (asymbol **) bfd_zalloc (abfd, amt); |
| 4073 | if (sdata->bss_section->symbol == NULL |
| 4074 | || sdata->bss_section->symbol_ptr_ptr == NULL) |
| 4075 | return FALSE; |
| 4076 | sdata->bss_section->symbol->name = sdata->bss_name; |
| 4077 | sdata->bss_section->symbol->flags = BSF_SECTION_SYM; |
| 4078 | sdata->bss_section->symbol->section = sdata->bss_section; |
| 4079 | *sdata->bss_section->symbol_ptr_ptr = sdata->bss_section->symbol; |
| 4080 | } |
| 4081 | |
| 4082 | *secp = sdata->bss_section; |
| 4083 | *valp = sym->st_size; |
| 4084 | } |
| 4085 | |
| 4086 | return TRUE; |
| 4087 | } |
| 4088 | \f |
| 4089 | /* Finish up dynamic symbol handling. We set the contents of various |
| 4090 | dynamic sections here. */ |
| 4091 | |
| 4092 | static bfd_boolean |
| 4093 | ppc_elf_finish_dynamic_symbol (output_bfd, info, h, sym) |
| 4094 | bfd *output_bfd; |
| 4095 | struct bfd_link_info *info; |
| 4096 | struct elf_link_hash_entry *h; |
| 4097 | Elf_Internal_Sym *sym; |
| 4098 | { |
| 4099 | struct ppc_elf_link_hash_table *htab; |
| 4100 | |
| 4101 | #ifdef DEBUG |
| 4102 | fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", |
| 4103 | h->root.root.string); |
| 4104 | #endif |
| 4105 | |
| 4106 | htab = ppc_elf_hash_table (info); |
| 4107 | BFD_ASSERT (htab->elf.dynobj != NULL); |
| 4108 | |
| 4109 | if (h->plt.offset != (bfd_vma) -1) |
| 4110 | { |
| 4111 | Elf_Internal_Rela rela; |
| 4112 | bfd_byte *loc; |
| 4113 | bfd_vma reloc_index; |
| 4114 | |
| 4115 | #ifdef DEBUG |
| 4116 | fprintf (stderr, ", plt_offset = %d", h->plt.offset); |
| 4117 | #endif |
| 4118 | |
| 4119 | /* This symbol has an entry in the procedure linkage table. Set |
| 4120 | it up. */ |
| 4121 | |
| 4122 | BFD_ASSERT (h->dynindx != -1); |
| 4123 | BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL); |
| 4124 | |
| 4125 | /* We don't need to fill in the .plt. The ppc dynamic linker |
| 4126 | will fill it in. */ |
| 4127 | |
| 4128 | /* Fill in the entry in the .rela.plt section. */ |
| 4129 | rela.r_offset = (htab->plt->output_section->vma |
| 4130 | + htab->plt->output_offset |
| 4131 | + h->plt.offset); |
| 4132 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); |
| 4133 | rela.r_addend = 0; |
| 4134 | |
| 4135 | reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE; |
| 4136 | if (reloc_index > PLT_NUM_SINGLE_ENTRIES) |
| 4137 | reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; |
| 4138 | loc = (htab->relplt->contents |
| 4139 | + reloc_index * sizeof (Elf32_External_Rela)); |
| 4140 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 4141 | |
| 4142 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 4143 | { |
| 4144 | /* Mark the symbol as undefined, rather than as defined in |
| 4145 | the .plt section. Leave the value alone. */ |
| 4146 | sym->st_shndx = SHN_UNDEF; |
| 4147 | /* If the symbol is weak, we do need to clear the value. |
| 4148 | Otherwise, the PLT entry would provide a definition for |
| 4149 | the symbol even if the symbol wasn't defined anywhere, |
| 4150 | and so the symbol would never be NULL. */ |
| 4151 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) |
| 4152 | == 0) |
| 4153 | sym->st_value = 0; |
| 4154 | } |
| 4155 | } |
| 4156 | |
| 4157 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
| 4158 | { |
| 4159 | asection *s; |
| 4160 | Elf_Internal_Rela rela; |
| 4161 | bfd_byte *loc; |
| 4162 | |
| 4163 | /* This symbols needs a copy reloc. Set it up. */ |
| 4164 | |
| 4165 | #ifdef DEBUG |
| 4166 | fprintf (stderr, ", copy"); |
| 4167 | #endif |
| 4168 | |
| 4169 | BFD_ASSERT (h->dynindx != -1); |
| 4170 | |
| 4171 | if (h->size <= elf_gp_size (htab->elf.dynobj)) |
| 4172 | s = htab->relsbss; |
| 4173 | else |
| 4174 | s = htab->relbss; |
| 4175 | BFD_ASSERT (s != NULL); |
| 4176 | |
| 4177 | rela.r_offset = (h->root.u.def.value |
| 4178 | + h->root.u.def.section->output_section->vma |
| 4179 | + h->root.u.def.section->output_offset); |
| 4180 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); |
| 4181 | rela.r_addend = 0; |
| 4182 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 4183 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 4184 | } |
| 4185 | |
| 4186 | #ifdef DEBUG |
| 4187 | fprintf (stderr, "\n"); |
| 4188 | #endif |
| 4189 | |
| 4190 | /* Mark some specially defined symbols as absolute. */ |
| 4191 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 4192 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 |
| 4193 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) |
| 4194 | sym->st_shndx = SHN_ABS; |
| 4195 | |
| 4196 | return TRUE; |
| 4197 | } |
| 4198 | \f |
| 4199 | /* Finish up the dynamic sections. */ |
| 4200 | |
| 4201 | static bfd_boolean |
| 4202 | ppc_elf_finish_dynamic_sections (output_bfd, info) |
| 4203 | bfd *output_bfd; |
| 4204 | struct bfd_link_info *info; |
| 4205 | { |
| 4206 | asection *sdyn; |
| 4207 | struct ppc_elf_link_hash_table *htab; |
| 4208 | |
| 4209 | #ifdef DEBUG |
| 4210 | fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); |
| 4211 | #endif |
| 4212 | |
| 4213 | htab = ppc_elf_hash_table (info); |
| 4214 | sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic"); |
| 4215 | |
| 4216 | if (htab->elf.dynamic_sections_created) |
| 4217 | { |
| 4218 | Elf32_External_Dyn *dyncon, *dynconend; |
| 4219 | |
| 4220 | BFD_ASSERT (htab->plt != NULL && sdyn != NULL); |
| 4221 | |
| 4222 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 4223 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| 4224 | for (; dyncon < dynconend; dyncon++) |
| 4225 | { |
| 4226 | Elf_Internal_Dyn dyn; |
| 4227 | asection *s; |
| 4228 | |
| 4229 | bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn); |
| 4230 | |
| 4231 | switch (dyn.d_tag) |
| 4232 | { |
| 4233 | case DT_PLTGOT: |
| 4234 | s = htab->plt; |
| 4235 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 4236 | break; |
| 4237 | |
| 4238 | case DT_PLTRELSZ: |
| 4239 | dyn.d_un.d_val = htab->relplt->_raw_size; |
| 4240 | break; |
| 4241 | |
| 4242 | case DT_JMPREL: |
| 4243 | s = htab->relplt; |
| 4244 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 4245 | break; |
| 4246 | |
| 4247 | default: |
| 4248 | continue; |
| 4249 | } |
| 4250 | |
| 4251 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4252 | } |
| 4253 | } |
| 4254 | |
| 4255 | /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can |
| 4256 | easily find the address of the _GLOBAL_OFFSET_TABLE_. */ |
| 4257 | if (htab->got) |
| 4258 | { |
| 4259 | unsigned char *contents = htab->got->contents; |
| 4260 | bfd_put_32 (output_bfd, (bfd_vma) 0x4e800021 /* blrl */, contents); |
| 4261 | |
| 4262 | if (sdyn == NULL) |
| 4263 | bfd_put_32 (output_bfd, (bfd_vma) 0, contents + 4); |
| 4264 | else |
| 4265 | bfd_put_32 (output_bfd, |
| 4266 | sdyn->output_section->vma + sdyn->output_offset, |
| 4267 | contents + 4); |
| 4268 | |
| 4269 | elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4; |
| 4270 | } |
| 4271 | |
| 4272 | return TRUE; |
| 4273 | } |
| 4274 | \f |
| 4275 | /* The RELOCATE_SECTION function is called by the ELF backend linker |
| 4276 | to handle the relocations for a section. |
| 4277 | |
| 4278 | The relocs are always passed as Rela structures; if the section |
| 4279 | actually uses Rel structures, the r_addend field will always be |
| 4280 | zero. |
| 4281 | |
| 4282 | This function is responsible for adjust the section contents as |
| 4283 | necessary, and (if using Rela relocs and generating a |
| 4284 | relocateable output file) adjusting the reloc addend as |
| 4285 | necessary. |
| 4286 | |
| 4287 | This function does not have to worry about setting the reloc |
| 4288 | address or the reloc symbol index. |
| 4289 | |
| 4290 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 4291 | |
| 4292 | LOCAL_SECTIONS is an array giving the section in the input file |
| 4293 | corresponding to the st_shndx field of each local symbol. |
| 4294 | |
| 4295 | The global hash table entry for the global symbols can be found |
| 4296 | via elf_sym_hashes (input_bfd). |
| 4297 | |
| 4298 | When generating relocateable output, this function must handle |
| 4299 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 4300 | going to be the section symbol corresponding to the output |
| 4301 | section, which means that the addend must be adjusted |
| 4302 | accordingly. */ |
| 4303 | |
| 4304 | static bfd_boolean |
| 4305 | ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
| 4306 | contents, relocs, local_syms, local_sections) |
| 4307 | bfd *output_bfd; |
| 4308 | struct bfd_link_info *info; |
| 4309 | bfd *input_bfd; |
| 4310 | asection *input_section; |
| 4311 | bfd_byte *contents; |
| 4312 | Elf_Internal_Rela *relocs; |
| 4313 | Elf_Internal_Sym *local_syms; |
| 4314 | asection **local_sections; |
| 4315 | { |
| 4316 | Elf_Internal_Shdr *symtab_hdr; |
| 4317 | struct elf_link_hash_entry **sym_hashes; |
| 4318 | struct ppc_elf_link_hash_table *htab; |
| 4319 | Elf_Internal_Rela *rel; |
| 4320 | Elf_Internal_Rela *relend; |
| 4321 | Elf_Internal_Rela outrel; |
| 4322 | bfd_byte *loc; |
| 4323 | asection *sreloc = NULL; |
| 4324 | bfd_vma *local_got_offsets; |
| 4325 | bfd_boolean ret = TRUE; |
| 4326 | |
| 4327 | #ifdef DEBUG |
| 4328 | fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, %ld relocations%s\n", |
| 4329 | bfd_archive_filename (input_bfd), |
| 4330 | bfd_section_name(input_bfd, input_section), |
| 4331 | (long) input_section->reloc_count, |
| 4332 | (info->relocateable) ? " (relocatable)" : ""); |
| 4333 | #endif |
| 4334 | |
| 4335 | if (info->relocateable) |
| 4336 | return TRUE; |
| 4337 | |
| 4338 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 4339 | /* Initialize howto table if needed. */ |
| 4340 | ppc_elf_howto_init (); |
| 4341 | |
| 4342 | htab = ppc_elf_hash_table (info); |
| 4343 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 4344 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 4345 | sym_hashes = elf_sym_hashes (input_bfd); |
| 4346 | rel = relocs; |
| 4347 | relend = relocs + input_section->reloc_count; |
| 4348 | for (; rel < relend; rel++) |
| 4349 | { |
| 4350 | enum elf_ppc_reloc_type r_type; |
| 4351 | bfd_vma addend; |
| 4352 | bfd_reloc_status_type r; |
| 4353 | Elf_Internal_Sym *sym; |
| 4354 | asection *sec; |
| 4355 | struct elf_link_hash_entry *h; |
| 4356 | const char *sym_name; |
| 4357 | reloc_howto_type *howto; |
| 4358 | unsigned long r_symndx; |
| 4359 | bfd_vma relocation; |
| 4360 | bfd_vma branch_bit, insn, from; |
| 4361 | bfd_boolean unresolved_reloc; |
| 4362 | bfd_boolean warned; |
| 4363 | unsigned int tls_type, tls_mask, tls_gd; |
| 4364 | |
| 4365 | r_type = (enum elf_ppc_reloc_type)ELF32_R_TYPE (rel->r_info); |
| 4366 | sym = (Elf_Internal_Sym *) 0; |
| 4367 | sec = (asection *) 0; |
| 4368 | h = (struct elf_link_hash_entry *) 0; |
| 4369 | unresolved_reloc = FALSE; |
| 4370 | warned = FALSE; |
| 4371 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 4372 | if (r_symndx < symtab_hdr->sh_info) |
| 4373 | { |
| 4374 | sym = local_syms + r_symndx; |
| 4375 | sec = local_sections[r_symndx]; |
| 4376 | sym_name = bfd_elf_local_sym_name (input_bfd, sym); |
| 4377 | |
| 4378 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
| 4379 | } |
| 4380 | else |
| 4381 | { |
| 4382 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 4383 | while (h->root.type == bfd_link_hash_indirect |
| 4384 | || h->root.type == bfd_link_hash_warning) |
| 4385 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 4386 | sym_name = h->root.root.string; |
| 4387 | |
| 4388 | relocation = 0; |
| 4389 | if (h->root.type == bfd_link_hash_defined |
| 4390 | || h->root.type == bfd_link_hash_defweak) |
| 4391 | { |
| 4392 | sec = h->root.u.def.section; |
| 4393 | /* Set a flag that will be cleared later if we find a |
| 4394 | relocation value for this symbol. output_section |
| 4395 | is typically NULL for symbols satisfied by a shared |
| 4396 | library. */ |
| 4397 | if (sec->output_section == NULL) |
| 4398 | unresolved_reloc = TRUE; |
| 4399 | else |
| 4400 | relocation = (h->root.u.def.value |
| 4401 | + sec->output_section->vma |
| 4402 | + sec->output_offset); |
| 4403 | } |
| 4404 | else if (h->root.type == bfd_link_hash_undefweak) |
| 4405 | ; |
| 4406 | else if (info->shared |
| 4407 | && !info->no_undefined |
| 4408 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
| 4409 | ; |
| 4410 | else |
| 4411 | { |
| 4412 | if (! ((*info->callbacks->undefined_symbol) |
| 4413 | (info, h->root.root.string, input_bfd, input_section, |
| 4414 | rel->r_offset, (!info->shared |
| 4415 | || info->no_undefined |
| 4416 | || ELF_ST_VISIBILITY (h->other))))) |
| 4417 | return FALSE; |
| 4418 | warned = TRUE; |
| 4419 | } |
| 4420 | } |
| 4421 | |
| 4422 | /* TLS optimizations. Replace instruction sequences and relocs |
| 4423 | based on information we collected in tls_optimize. We edit |
| 4424 | RELOCS so that --emit-relocs will output something sensible |
| 4425 | for the final instruction stream. */ |
| 4426 | tls_mask = 0; |
| 4427 | tls_gd = 0; |
| 4428 | if (IS_PPC_TLS_RELOC (r_type)) |
| 4429 | { |
| 4430 | if (h != NULL) |
| 4431 | tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask; |
| 4432 | else if (local_got_offsets != NULL) |
| 4433 | { |
| 4434 | char *lgot_masks; |
| 4435 | lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info); |
| 4436 | tls_mask = lgot_masks[r_symndx]; |
| 4437 | } |
| 4438 | } |
| 4439 | |
| 4440 | /* Ensure reloc mapping code below stays sane. */ |
| 4441 | if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3) |
| 4442 | || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3) |
| 4443 | || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3) |
| 4444 | || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3) |
| 4445 | || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3) |
| 4446 | || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3) |
| 4447 | || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3) |
| 4448 | || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3)) |
| 4449 | abort (); |
| 4450 | switch (r_type) |
| 4451 | { |
| 4452 | default: |
| 4453 | break; |
| 4454 | |
| 4455 | case R_PPC_GOT_TPREL16: |
| 4456 | case R_PPC_GOT_TPREL16_LO: |
| 4457 | if (tls_mask != 0 |
| 4458 | && (tls_mask & TLS_TPREL) == 0) |
| 4459 | { |
| 4460 | bfd_vma insn; |
| 4461 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2); |
| 4462 | insn &= 31 << 21; |
| 4463 | insn |= 0x3c020000; /* addis 0,2,0 */ |
| 4464 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2); |
| 4465 | r_type = R_PPC_TPREL16_HA; |
| 4466 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 4467 | } |
| 4468 | break; |
| 4469 | |
| 4470 | case R_PPC_TLS: |
| 4471 | if (tls_mask != 0 |
| 4472 | && (tls_mask & TLS_TPREL) == 0) |
| 4473 | { |
| 4474 | bfd_vma insn, rtra; |
| 4475 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 4476 | if ((insn & ((31 << 26) | (31 << 11))) |
| 4477 | == ((31 << 26) | (2 << 11))) |
| 4478 | rtra = insn & ((1 << 26) - (1 << 16)); |
| 4479 | else if ((insn & ((31 << 26) | (31 << 16))) |
| 4480 | == ((31 << 26) | (2 << 16))) |
| 4481 | rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5); |
| 4482 | else |
| 4483 | abort (); |
| 4484 | if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1) |
| 4485 | /* add -> addi. */ |
| 4486 | insn = 14 << 26; |
| 4487 | else if ((insn & (31 << 1)) == 23 << 1 |
| 4488 | && ((insn & (31 << 6)) < 14 << 6 |
| 4489 | || ((insn & (31 << 6)) >= 16 << 6 |
| 4490 | && (insn & (31 << 6)) < 24 << 6))) |
| 4491 | /* load and store indexed -> dform. */ |
| 4492 | insn = (32 | ((insn >> 6) & 31)) << 26; |
| 4493 | else if ((insn & (31 << 1)) == 21 << 1 |
| 4494 | && (insn & (0x1a << 6)) == 0) |
| 4495 | /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ |
| 4496 | insn = (((58 | ((insn >> 6) & 4)) << 26) |
| 4497 | | ((insn >> 6) & 1)); |
| 4498 | else if ((insn & (31 << 1)) == 21 << 1 |
| 4499 | && (insn & ((1 << 11) - (1 << 1))) == 341 << 1) |
| 4500 | /* lwax -> lwa. */ |
| 4501 | insn = (58 << 26) | 2; |
| 4502 | else |
| 4503 | abort (); |
| 4504 | insn |= rtra; |
| 4505 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 4506 | r_type = R_PPC_TPREL16_LO; |
| 4507 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 4508 | /* Was PPC_TLS which sits on insn boundary, now |
| 4509 | PPC_TPREL16_LO which is at insn+2. */ |
| 4510 | rel->r_offset += 2; |
| 4511 | } |
| 4512 | break; |
| 4513 | |
| 4514 | case R_PPC_GOT_TLSGD16_HI: |
| 4515 | case R_PPC_GOT_TLSGD16_HA: |
| 4516 | tls_gd = TLS_TPRELGD; |
| 4517 | if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) |
| 4518 | goto tls_gdld_hi; |
| 4519 | break; |
| 4520 | |
| 4521 | case R_PPC_GOT_TLSLD16_HI: |
| 4522 | case R_PPC_GOT_TLSLD16_HA: |
| 4523 | if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) |
| 4524 | { |
| 4525 | tls_gdld_hi: |
| 4526 | if ((tls_mask & tls_gd) != 0) |
| 4527 | r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) |
| 4528 | + R_PPC_GOT_TPREL16); |
| 4529 | else |
| 4530 | { |
| 4531 | bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); |
| 4532 | rel->r_offset -= 2; |
| 4533 | r_type = R_PPC_NONE; |
| 4534 | } |
| 4535 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 4536 | } |
| 4537 | break; |
| 4538 | |
| 4539 | case R_PPC_GOT_TLSGD16: |
| 4540 | case R_PPC_GOT_TLSGD16_LO: |
| 4541 | tls_gd = TLS_TPRELGD; |
| 4542 | if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) |
| 4543 | goto tls_get_addr_check; |
| 4544 | break; |
| 4545 | |
| 4546 | case R_PPC_GOT_TLSLD16: |
| 4547 | case R_PPC_GOT_TLSLD16_LO: |
| 4548 | if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) |
| 4549 | { |
| 4550 | tls_get_addr_check: |
| 4551 | if (rel + 1 < relend) |
| 4552 | { |
| 4553 | enum elf_ppc_reloc_type r_type2; |
| 4554 | unsigned long r_symndx2; |
| 4555 | struct elf_link_hash_entry *h2; |
| 4556 | bfd_vma insn1, insn2; |
| 4557 | bfd_vma offset; |
| 4558 | |
| 4559 | /* The next instruction should be a call to |
| 4560 | __tls_get_addr. Peek at the reloc to be sure. */ |
| 4561 | r_type2 |
| 4562 | = (enum elf_ppc_reloc_type) ELF32_R_TYPE (rel[1].r_info); |
| 4563 | r_symndx2 = ELF32_R_SYM (rel[1].r_info); |
| 4564 | if (r_symndx2 < symtab_hdr->sh_info |
| 4565 | || (r_type2 != R_PPC_REL14 |
| 4566 | && r_type2 != R_PPC_REL14_BRTAKEN |
| 4567 | && r_type2 != R_PPC_REL14_BRNTAKEN |
| 4568 | && r_type2 != R_PPC_REL24 |
| 4569 | && r_type2 != R_PPC_PLTREL24)) |
| 4570 | break; |
| 4571 | |
| 4572 | h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info]; |
| 4573 | while (h2->root.type == bfd_link_hash_indirect |
| 4574 | || h2->root.type == bfd_link_hash_warning) |
| 4575 | h2 = (struct elf_link_hash_entry *) h2->root.u.i.link; |
| 4576 | if (h2 == NULL || h2 != htab->tls_get_addr) |
| 4577 | break; |
| 4578 | |
| 4579 | /* OK, it checks out. Replace the call. */ |
| 4580 | offset = rel[1].r_offset; |
| 4581 | insn1 = bfd_get_32 (output_bfd, |
| 4582 | contents + rel->r_offset - 2); |
| 4583 | if ((tls_mask & tls_gd) != 0) |
| 4584 | { |
| 4585 | /* IE */ |
| 4586 | insn1 &= (1 << 26) - 1; |
| 4587 | insn1 |= 32 << 26; /* lwz */ |
| 4588 | insn2 = 0x7c631214; /* add 3,3,2 */ |
| 4589 | rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE); |
| 4590 | r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) |
| 4591 | + R_PPC_GOT_TPREL16); |
| 4592 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 4593 | } |
| 4594 | else |
| 4595 | { |
| 4596 | /* LE */ |
| 4597 | insn1 = 0x3c620000; /* addis 3,2,0 */ |
| 4598 | insn2 = 0x38630000; /* addi 3,3,0 */ |
| 4599 | if (tls_gd == 0) |
| 4600 | { |
| 4601 | /* Was an LD reloc. */ |
| 4602 | r_symndx = 0; |
| 4603 | rel->r_addend = htab->tls_sec->vma + DTP_OFFSET; |
| 4604 | rel[1].r_addend = htab->tls_sec->vma + DTP_OFFSET; |
| 4605 | } |
| 4606 | r_type = R_PPC_TPREL16_HA; |
| 4607 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 4608 | rel[1].r_info = ELF32_R_INFO (r_symndx, |
| 4609 | R_PPC_TPREL16_LO); |
| 4610 | rel[1].r_offset += 2; |
| 4611 | } |
| 4612 | bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2); |
| 4613 | bfd_put_32 (output_bfd, insn2, contents + offset); |
| 4614 | if (tls_gd == 0) |
| 4615 | { |
| 4616 | /* We changed the symbol on an LD reloc. Start over |
| 4617 | in order to get h, sym, sec etc. right. */ |
| 4618 | rel--; |
| 4619 | continue; |
| 4620 | } |
| 4621 | } |
| 4622 | } |
| 4623 | break; |
| 4624 | } |
| 4625 | |
| 4626 | /* Handle other relocations that tweak non-addend part of insn. */ |
| 4627 | branch_bit = 0; |
| 4628 | switch (r_type) |
| 4629 | { |
| 4630 | default: |
| 4631 | break; |
| 4632 | |
| 4633 | /* Branch taken prediction relocations. */ |
| 4634 | case R_PPC_ADDR14_BRTAKEN: |
| 4635 | case R_PPC_REL14_BRTAKEN: |
| 4636 | branch_bit = BRANCH_PREDICT_BIT; |
| 4637 | /* Fall thru */ |
| 4638 | |
| 4639 | /* Branch not taken predicition relocations. */ |
| 4640 | case R_PPC_ADDR14_BRNTAKEN: |
| 4641 | case R_PPC_REL14_BRNTAKEN: |
| 4642 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 4643 | insn &= ~BRANCH_PREDICT_BIT; |
| 4644 | insn |= branch_bit; |
| 4645 | |
| 4646 | from = (rel->r_offset |
| 4647 | + input_section->output_offset |
| 4648 | + input_section->output_section->vma); |
| 4649 | |
| 4650 | /* Invert 'y' bit if not the default. */ |
| 4651 | if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) |
| 4652 | insn ^= BRANCH_PREDICT_BIT; |
| 4653 | |
| 4654 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 4655 | break; |
| 4656 | } |
| 4657 | |
| 4658 | addend = rel->r_addend; |
| 4659 | tls_type = 0; |
| 4660 | howto = NULL; |
| 4661 | if ((unsigned) r_type < (unsigned) R_PPC_max) |
| 4662 | howto = ppc_elf_howto_table[(int) r_type]; |
| 4663 | switch (r_type) |
| 4664 | { |
| 4665 | default: |
| 4666 | (*_bfd_error_handler) |
| 4667 | (_("%s: unknown relocation type %d for symbol %s"), |
| 4668 | bfd_archive_filename (input_bfd), (int) r_type, sym_name); |
| 4669 | |
| 4670 | bfd_set_error (bfd_error_bad_value); |
| 4671 | ret = FALSE; |
| 4672 | continue; |
| 4673 | |
| 4674 | case R_PPC_NONE: |
| 4675 | case R_PPC_TLS: |
| 4676 | case R_PPC_EMB_MRKREF: |
| 4677 | case R_PPC_GNU_VTINHERIT: |
| 4678 | case R_PPC_GNU_VTENTRY: |
| 4679 | continue; |
| 4680 | |
| 4681 | /* GOT16 relocations. Like an ADDR16 using the symbol's |
| 4682 | address in the GOT as relocation value instead of the |
| 4683 | symbol's value itself. Also, create a GOT entry for the |
| 4684 | symbol and put the symbol value there. */ |
| 4685 | case R_PPC_GOT_TLSGD16: |
| 4686 | case R_PPC_GOT_TLSGD16_LO: |
| 4687 | case R_PPC_GOT_TLSGD16_HI: |
| 4688 | case R_PPC_GOT_TLSGD16_HA: |
| 4689 | tls_type = TLS_TLS | TLS_GD; |
| 4690 | goto dogot; |
| 4691 | |
| 4692 | case R_PPC_GOT_TLSLD16: |
| 4693 | case R_PPC_GOT_TLSLD16_LO: |
| 4694 | case R_PPC_GOT_TLSLD16_HI: |
| 4695 | case R_PPC_GOT_TLSLD16_HA: |
| 4696 | tls_type = TLS_TLS | TLS_LD; |
| 4697 | goto dogot; |
| 4698 | |
| 4699 | case R_PPC_GOT_TPREL16: |
| 4700 | case R_PPC_GOT_TPREL16_LO: |
| 4701 | case R_PPC_GOT_TPREL16_HI: |
| 4702 | case R_PPC_GOT_TPREL16_HA: |
| 4703 | tls_type = TLS_TLS | TLS_TPREL; |
| 4704 | goto dogot; |
| 4705 | |
| 4706 | case R_PPC_GOT_DTPREL16: |
| 4707 | case R_PPC_GOT_DTPREL16_LO: |
| 4708 | case R_PPC_GOT_DTPREL16_HI: |
| 4709 | case R_PPC_GOT_DTPREL16_HA: |
| 4710 | tls_type = TLS_TLS | TLS_DTPREL; |
| 4711 | goto dogot; |
| 4712 | |
| 4713 | case R_PPC_GOT16: |
| 4714 | case R_PPC_GOT16_LO: |
| 4715 | case R_PPC_GOT16_HI: |
| 4716 | case R_PPC_GOT16_HA: |
| 4717 | dogot: |
| 4718 | { |
| 4719 | /* Relocation is to the entry for this symbol in the global |
| 4720 | offset table. */ |
| 4721 | bfd_vma off; |
| 4722 | bfd_vma *offp; |
| 4723 | unsigned long indx; |
| 4724 | |
| 4725 | if (htab->got == NULL) |
| 4726 | abort (); |
| 4727 | |
| 4728 | indx = 0; |
| 4729 | if (tls_type == (TLS_TLS | TLS_LD) |
| 4730 | && (h == NULL |
| 4731 | || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))) |
| 4732 | offp = &htab->tlsld_got.offset; |
| 4733 | else if (h != NULL) |
| 4734 | { |
| 4735 | bfd_boolean dyn; |
| 4736 | dyn = htab->elf.dynamic_sections_created; |
| 4737 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 4738 | || (info->shared |
| 4739 | && SYMBOL_REFERENCES_LOCAL (info, h))) |
| 4740 | /* This is actually a static link, or it is a |
| 4741 | -Bsymbolic link and the symbol is defined |
| 4742 | locally, or the symbol was forced to be local |
| 4743 | because of a version file. */ |
| 4744 | ; |
| 4745 | else |
| 4746 | { |
| 4747 | indx = h->dynindx; |
| 4748 | unresolved_reloc = FALSE; |
| 4749 | } |
| 4750 | offp = &h->got.offset; |
| 4751 | } |
| 4752 | else |
| 4753 | { |
| 4754 | if (local_got_offsets == NULL) |
| 4755 | abort (); |
| 4756 | offp = &local_got_offsets[r_symndx]; |
| 4757 | } |
| 4758 | |
| 4759 | /* The offset must always be a multiple of 4. We use the |
| 4760 | least significant bit to record whether we have already |
| 4761 | processed this entry. */ |
| 4762 | off = *offp; |
| 4763 | if ((off & 1) != 0) |
| 4764 | off &= ~1; |
| 4765 | else |
| 4766 | { |
| 4767 | unsigned int tls_m = (tls_mask |
| 4768 | & (TLS_LD | TLS_GD | TLS_DTPREL |
| 4769 | | TLS_TPREL | TLS_TPRELGD)); |
| 4770 | |
| 4771 | if (offp == &htab->tlsld_got.offset) |
| 4772 | tls_m = TLS_LD; |
| 4773 | else if (h == NULL |
| 4774 | || !(h->elf_link_hash_flags |
| 4775 | & ELF_LINK_HASH_DEF_DYNAMIC)) |
| 4776 | tls_m &= ~TLS_LD; |
| 4777 | |
| 4778 | /* We might have multiple got entries for this sym. |
| 4779 | Initialize them all. */ |
| 4780 | do |
| 4781 | { |
| 4782 | int tls_ty = 0; |
| 4783 | |
| 4784 | if ((tls_m & TLS_LD) != 0) |
| 4785 | { |
| 4786 | tls_ty = TLS_TLS | TLS_LD; |
| 4787 | tls_m &= ~TLS_LD; |
| 4788 | } |
| 4789 | else if ((tls_m & TLS_GD) != 0) |
| 4790 | { |
| 4791 | tls_ty = TLS_TLS | TLS_GD; |
| 4792 | tls_m &= ~TLS_GD; |
| 4793 | } |
| 4794 | else if ((tls_m & TLS_DTPREL) != 0) |
| 4795 | { |
| 4796 | tls_ty = TLS_TLS | TLS_DTPREL; |
| 4797 | tls_m &= ~TLS_DTPREL; |
| 4798 | } |
| 4799 | else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0) |
| 4800 | { |
| 4801 | tls_ty = TLS_TLS | TLS_TPREL; |
| 4802 | tls_m = 0; |
| 4803 | } |
| 4804 | |
| 4805 | /* Generate relocs for the dynamic linker. */ |
| 4806 | if ((info->shared || indx != 0) |
| 4807 | && (h == NULL |
| 4808 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 4809 | || h->root.type != bfd_link_hash_undefweak)) |
| 4810 | { |
| 4811 | outrel.r_offset = (htab->got->output_section->vma |
| 4812 | + htab->got->output_offset |
| 4813 | + off); |
| 4814 | outrel.r_addend = 0; |
| 4815 | if (tls_ty & (TLS_LD | TLS_GD)) |
| 4816 | { |
| 4817 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32); |
| 4818 | if (tls_ty == (TLS_TLS | TLS_GD)) |
| 4819 | { |
| 4820 | loc = htab->relgot->contents; |
| 4821 | loc += (htab->relgot->reloc_count++ |
| 4822 | * sizeof (Elf32_External_Rela)); |
| 4823 | bfd_elf32_swap_reloca_out (output_bfd, |
| 4824 | &outrel, loc); |
| 4825 | outrel.r_offset += 4; |
| 4826 | outrel.r_info |
| 4827 | = ELF32_R_INFO (indx, R_PPC_DTPREL32); |
| 4828 | } |
| 4829 | } |
| 4830 | else if (tls_ty == (TLS_TLS | TLS_DTPREL)) |
| 4831 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32); |
| 4832 | else if (tls_ty == (TLS_TLS | TLS_TPREL)) |
| 4833 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32); |
| 4834 | else if (indx == 0) |
| 4835 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE); |
| 4836 | else |
| 4837 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT); |
| 4838 | if (indx == 0) |
| 4839 | { |
| 4840 | outrel.r_addend += relocation; |
| 4841 | if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL)) |
| 4842 | outrel.r_addend -= htab->tls_sec->vma; |
| 4843 | } |
| 4844 | loc = htab->relgot->contents; |
| 4845 | loc += (htab->relgot->reloc_count++ |
| 4846 | * sizeof (Elf32_External_Rela)); |
| 4847 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 4848 | } |
| 4849 | |
| 4850 | /* Init the .got section contents if we're not |
| 4851 | emitting a reloc. */ |
| 4852 | else |
| 4853 | { |
| 4854 | bfd_vma value = relocation; |
| 4855 | |
| 4856 | if (tls_ty == (TLS_TLS | TLS_LD)) |
| 4857 | value = 1; |
| 4858 | else if (tls_ty != 0) |
| 4859 | { |
| 4860 | value -= htab->tls_sec->vma + DTP_OFFSET; |
| 4861 | if (tls_ty == (TLS_TLS | TLS_TPREL)) |
| 4862 | value += DTP_OFFSET - TP_OFFSET; |
| 4863 | |
| 4864 | if (tls_ty == (TLS_TLS | TLS_GD)) |
| 4865 | { |
| 4866 | bfd_put_32 (output_bfd, value, |
| 4867 | htab->got->contents + off + 4); |
| 4868 | value = 1; |
| 4869 | } |
| 4870 | } |
| 4871 | bfd_put_32 (output_bfd, value, |
| 4872 | htab->got->contents + off); |
| 4873 | } |
| 4874 | |
| 4875 | off += 4; |
| 4876 | if (tls_ty & (TLS_LD | TLS_GD)) |
| 4877 | off += 4; |
| 4878 | } |
| 4879 | while (tls_m != 0); |
| 4880 | |
| 4881 | off = *offp; |
| 4882 | *offp = off | 1; |
| 4883 | } |
| 4884 | |
| 4885 | if (off >= (bfd_vma) -2) |
| 4886 | abort (); |
| 4887 | |
| 4888 | if ((tls_type & TLS_TLS) != 0) |
| 4889 | { |
| 4890 | if (tls_type != (TLS_TLS | TLS_LD)) |
| 4891 | { |
| 4892 | if ((tls_mask & TLS_LD) != 0 |
| 4893 | && !(h == NULL |
| 4894 | || !(h->elf_link_hash_flags |
| 4895 | & ELF_LINK_HASH_DEF_DYNAMIC))) |
| 4896 | off += 8; |
| 4897 | if (tls_type != (TLS_TLS | TLS_GD)) |
| 4898 | { |
| 4899 | if ((tls_mask & TLS_GD) != 0) |
| 4900 | off += 8; |
| 4901 | if (tls_type != (TLS_TLS | TLS_DTPREL)) |
| 4902 | { |
| 4903 | if ((tls_mask & TLS_DTPREL) != 0) |
| 4904 | off += 4; |
| 4905 | } |
| 4906 | } |
| 4907 | } |
| 4908 | } |
| 4909 | |
| 4910 | relocation = htab->got->output_offset + off - 4; |
| 4911 | |
| 4912 | /* Addends on got relocations don't make much sense. |
| 4913 | x+off@got is actually x@got+off, and since the got is |
| 4914 | generated by a hash table traversal, the value in the |
| 4915 | got at entry m+n bears little relation to the entry m. */ |
| 4916 | if (addend != 0) |
| 4917 | (*_bfd_error_handler) |
| 4918 | (_("%s(%s+0x%lx): non-zero addend on %s reloc against `%s'"), |
| 4919 | bfd_archive_filename (input_bfd), |
| 4920 | bfd_get_section_name (input_bfd, input_section), |
| 4921 | (long) rel->r_offset, |
| 4922 | howto->name, |
| 4923 | sym_name); |
| 4924 | } |
| 4925 | break; |
| 4926 | |
| 4927 | /* Relocations that need no special processing. */ |
| 4928 | case R_PPC_LOCAL24PC: |
| 4929 | /* It makes no sense to point a local relocation |
| 4930 | at a symbol not in this object. */ |
| 4931 | if (unresolved_reloc) |
| 4932 | { |
| 4933 | if (! (*info->callbacks->undefined_symbol) (info, |
| 4934 | h->root.root.string, |
| 4935 | input_bfd, |
| 4936 | input_section, |
| 4937 | rel->r_offset, |
| 4938 | TRUE)) |
| 4939 | return FALSE; |
| 4940 | continue; |
| 4941 | } |
| 4942 | break; |
| 4943 | |
| 4944 | case R_PPC_DTPREL16: |
| 4945 | case R_PPC_DTPREL16_LO: |
| 4946 | case R_PPC_DTPREL16_HI: |
| 4947 | case R_PPC_DTPREL16_HA: |
| 4948 | addend -= htab->tls_sec->vma + DTP_OFFSET; |
| 4949 | break; |
| 4950 | |
| 4951 | /* Relocations that may need to be propagated if this is a shared |
| 4952 | object. */ |
| 4953 | case R_PPC_TPREL16: |
| 4954 | case R_PPC_TPREL16_LO: |
| 4955 | case R_PPC_TPREL16_HI: |
| 4956 | case R_PPC_TPREL16_HA: |
| 4957 | addend -= htab->tls_sec->vma + TP_OFFSET; |
| 4958 | /* The TPREL16 relocs shouldn't really be used in shared |
| 4959 | libs as they will result in DT_TEXTREL being set, but |
| 4960 | support them anyway. */ |
| 4961 | goto dodyn; |
| 4962 | |
| 4963 | case R_PPC_TPREL32: |
| 4964 | addend -= htab->tls_sec->vma + TP_OFFSET; |
| 4965 | goto dodyn; |
| 4966 | |
| 4967 | case R_PPC_DTPREL32: |
| 4968 | addend -= htab->tls_sec->vma + DTP_OFFSET; |
| 4969 | goto dodyn; |
| 4970 | |
| 4971 | case R_PPC_DTPMOD32: |
| 4972 | relocation = 1; |
| 4973 | addend = 0; |
| 4974 | goto dodyn; |
| 4975 | |
| 4976 | case R_PPC_REL24: |
| 4977 | case R_PPC_REL32: |
| 4978 | case R_PPC_REL14: |
| 4979 | case R_PPC_REL14_BRTAKEN: |
| 4980 | case R_PPC_REL14_BRNTAKEN: |
| 4981 | /* If these relocations are not to a named symbol, they can be |
| 4982 | handled right here, no need to bother the dynamic linker. */ |
| 4983 | if (h == NULL |
| 4984 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 |
| 4985 | || SYMBOL_REFERENCES_LOCAL (info, h)) |
| 4986 | break; |
| 4987 | /* fall through */ |
| 4988 | |
| 4989 | /* Relocations that always need to be propagated if this is a shared |
| 4990 | object. */ |
| 4991 | case R_PPC_ADDR32: |
| 4992 | case R_PPC_ADDR24: |
| 4993 | case R_PPC_ADDR16: |
| 4994 | case R_PPC_ADDR16_LO: |
| 4995 | case R_PPC_ADDR16_HI: |
| 4996 | case R_PPC_ADDR16_HA: |
| 4997 | case R_PPC_ADDR14: |
| 4998 | case R_PPC_ADDR14_BRTAKEN: |
| 4999 | case R_PPC_ADDR14_BRNTAKEN: |
| 5000 | case R_PPC_UADDR32: |
| 5001 | case R_PPC_UADDR16: |
| 5002 | /* r_symndx will be zero only for relocs against symbols |
| 5003 | from removed linkonce sections, or sections discarded by |
| 5004 | a linker script. */ |
| 5005 | dodyn: |
| 5006 | if (r_symndx == 0) |
| 5007 | break; |
| 5008 | /* Fall thru. */ |
| 5009 | |
| 5010 | if ((info->shared |
| 5011 | && (h == NULL |
| 5012 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 5013 | || h->root.type != bfd_link_hash_undefweak) |
| 5014 | && (MUST_BE_DYN_RELOC (r_type) |
| 5015 | || (h != NULL |
| 5016 | && h->dynindx != -1 |
| 5017 | && (!info->symbolic |
| 5018 | || (h->elf_link_hash_flags |
| 5019 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) |
| 5020 | || (ELIMINATE_COPY_RELOCS |
| 5021 | && !info->shared |
| 5022 | && (input_section->flags & SEC_ALLOC) != 0 |
| 5023 | && h != NULL |
| 5024 | && h->dynindx != -1 |
| 5025 | && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 |
| 5026 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 5027 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| 5028 | { |
| 5029 | int skip; |
| 5030 | |
| 5031 | #ifdef DEBUG |
| 5032 | fprintf (stderr, "ppc_elf_relocate_section need to create relocation for %s\n", |
| 5033 | (h && h->root.root.string |
| 5034 | ? h->root.root.string : "<unknown>")); |
| 5035 | #endif |
| 5036 | |
| 5037 | /* When generating a shared object, these relocations |
| 5038 | are copied into the output file to be resolved at run |
| 5039 | time. */ |
| 5040 | if (sreloc == NULL) |
| 5041 | { |
| 5042 | const char *name; |
| 5043 | |
| 5044 | name = (bfd_elf_string_from_elf_section |
| 5045 | (input_bfd, |
| 5046 | elf_elfheader (input_bfd)->e_shstrndx, |
| 5047 | elf_section_data (input_section)->rel_hdr.sh_name)); |
| 5048 | if (name == NULL) |
| 5049 | return FALSE; |
| 5050 | |
| 5051 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 5052 | && strcmp (bfd_get_section_name (input_bfd, |
| 5053 | input_section), |
| 5054 | name + 5) == 0); |
| 5055 | |
| 5056 | sreloc = bfd_get_section_by_name (htab->elf.dynobj, name); |
| 5057 | BFD_ASSERT (sreloc != NULL); |
| 5058 | } |
| 5059 | |
| 5060 | skip = 0; |
| 5061 | |
| 5062 | outrel.r_offset = |
| 5063 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 5064 | rel->r_offset); |
| 5065 | if (outrel.r_offset == (bfd_vma) -1 |
| 5066 | || outrel.r_offset == (bfd_vma) -2) |
| 5067 | skip = (int) outrel.r_offset; |
| 5068 | outrel.r_offset += (input_section->output_section->vma |
| 5069 | + input_section->output_offset); |
| 5070 | |
| 5071 | if (skip) |
| 5072 | memset (&outrel, 0, sizeof outrel); |
| 5073 | else if (h != NULL |
| 5074 | && !SYMBOL_REFERENCES_LOCAL (info, h)) |
| 5075 | { |
| 5076 | unresolved_reloc = FALSE; |
| 5077 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 5078 | outrel.r_addend = rel->r_addend; |
| 5079 | } |
| 5080 | else |
| 5081 | { |
| 5082 | outrel.r_addend = relocation + rel->r_addend; |
| 5083 | |
| 5084 | if (r_type == R_PPC_ADDR32) |
| 5085 | outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); |
| 5086 | else |
| 5087 | { |
| 5088 | long indx; |
| 5089 | |
| 5090 | if (bfd_is_abs_section (sec)) |
| 5091 | indx = 0; |
| 5092 | else if (sec == NULL || sec->owner == NULL) |
| 5093 | { |
| 5094 | bfd_set_error (bfd_error_bad_value); |
| 5095 | return FALSE; |
| 5096 | } |
| 5097 | else |
| 5098 | { |
| 5099 | asection *osec; |
| 5100 | |
| 5101 | /* We are turning this relocation into one |
| 5102 | against a section symbol. It would be |
| 5103 | proper to subtract the symbol's value, |
| 5104 | osec->vma, from the emitted reloc addend, |
| 5105 | but ld.so expects buggy relocs. */ |
| 5106 | osec = sec->output_section; |
| 5107 | indx = elf_section_data (osec)->dynindx; |
| 5108 | BFD_ASSERT (indx > 0); |
| 5109 | #ifdef DEBUG |
| 5110 | if (indx <= 0) |
| 5111 | { |
| 5112 | printf ("indx=%d section=%s flags=%08x name=%s\n", |
| 5113 | indx, osec->name, osec->flags, |
| 5114 | h->root.root.string); |
| 5115 | } |
| 5116 | #endif |
| 5117 | } |
| 5118 | |
| 5119 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
| 5120 | } |
| 5121 | } |
| 5122 | |
| 5123 | loc = sreloc->contents; |
| 5124 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); |
| 5125 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 5126 | |
| 5127 | if (skip == -1) |
| 5128 | continue; |
| 5129 | |
| 5130 | /* This reloc will be computed at runtime. We clear the memory |
| 5131 | so that it contains predictable value. */ |
| 5132 | if (! skip |
| 5133 | && ((input_section->flags & SEC_ALLOC) != 0 |
| 5134 | || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE)) |
| 5135 | { |
| 5136 | relocation = howto->pc_relative ? outrel.r_offset : 0; |
| 5137 | addend = 0; |
| 5138 | break; |
| 5139 | } |
| 5140 | } |
| 5141 | break; |
| 5142 | |
| 5143 | /* Indirect .sdata relocation. */ |
| 5144 | case R_PPC_EMB_SDAI16: |
| 5145 | BFD_ASSERT (htab->sdata != NULL); |
| 5146 | relocation |
| 5147 | = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, |
| 5148 | info, htab->sdata, h, |
| 5149 | relocation, rel, |
| 5150 | R_PPC_RELATIVE); |
| 5151 | break; |
| 5152 | |
| 5153 | /* Indirect .sdata2 relocation. */ |
| 5154 | case R_PPC_EMB_SDA2I16: |
| 5155 | BFD_ASSERT (htab->sdata2 != NULL); |
| 5156 | relocation |
| 5157 | = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, |
| 5158 | info, htab->sdata2, h, |
| 5159 | relocation, rel, |
| 5160 | R_PPC_RELATIVE); |
| 5161 | break; |
| 5162 | |
| 5163 | /* Handle the TOC16 reloc. We want to use the offset within the .got |
| 5164 | section, not the actual VMA. This is appropriate when generating |
| 5165 | an embedded ELF object, for which the .got section acts like the |
| 5166 | AIX .toc section. */ |
| 5167 | case R_PPC_TOC16: /* phony GOT16 relocations */ |
| 5168 | BFD_ASSERT (sec != (asection *) 0); |
| 5169 | BFD_ASSERT (bfd_is_und_section (sec) |
| 5170 | || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0 |
| 5171 | || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0) |
| 5172 | |
| 5173 | addend -= sec->output_section->vma + sec->output_offset + 0x8000; |
| 5174 | break; |
| 5175 | |
| 5176 | case R_PPC_PLTREL24: |
| 5177 | /* Relocation is to the entry for this symbol in the |
| 5178 | procedure linkage table. */ |
| 5179 | BFD_ASSERT (h != NULL); |
| 5180 | |
| 5181 | if (h->plt.offset == (bfd_vma) -1 |
| 5182 | || htab->plt == NULL) |
| 5183 | { |
| 5184 | /* We didn't make a PLT entry for this symbol. This |
| 5185 | happens when statically linking PIC code, or when |
| 5186 | using -Bsymbolic. */ |
| 5187 | break; |
| 5188 | } |
| 5189 | |
| 5190 | unresolved_reloc = FALSE; |
| 5191 | relocation = (htab->plt->output_section->vma |
| 5192 | + htab->plt->output_offset |
| 5193 | + h->plt.offset); |
| 5194 | break; |
| 5195 | |
| 5196 | /* Relocate against _SDA_BASE_. */ |
| 5197 | case R_PPC_SDAREL16: |
| 5198 | { |
| 5199 | const char *name; |
| 5200 | const struct elf_link_hash_entry *sh; |
| 5201 | |
| 5202 | BFD_ASSERT (sec != (asection *) 0); |
| 5203 | name = bfd_get_section_name (abfd, sec->output_section); |
| 5204 | if (! ((strncmp (name, ".sdata", 6) == 0 |
| 5205 | && (name[6] == 0 || name[6] == '.')) |
| 5206 | || (strncmp (name, ".sbss", 5) == 0 |
| 5207 | && (name[5] == 0 || name[5] == '.')))) |
| 5208 | { |
| 5209 | (*_bfd_error_handler) (_("%s: the target (%s) of a %s relocation is in the wrong output section (%s)"), |
| 5210 | bfd_archive_filename (input_bfd), |
| 5211 | sym_name, |
| 5212 | howto->name, |
| 5213 | name); |
| 5214 | } |
| 5215 | sh = htab->sdata->sym_hash; |
| 5216 | addend -= (sh->root.u.def.value |
| 5217 | + sh->root.u.def.section->output_section->vma |
| 5218 | + sh->root.u.def.section->output_offset); |
| 5219 | } |
| 5220 | break; |
| 5221 | |
| 5222 | /* Relocate against _SDA2_BASE_. */ |
| 5223 | case R_PPC_EMB_SDA2REL: |
| 5224 | { |
| 5225 | const char *name; |
| 5226 | const struct elf_link_hash_entry *sh; |
| 5227 | |
| 5228 | BFD_ASSERT (sec != (asection *) 0); |
| 5229 | name = bfd_get_section_name (abfd, sec->output_section); |
| 5230 | if (! (strncmp (name, ".sdata2", 7) == 0 |
| 5231 | || strncmp (name, ".sbss2", 6) == 0)) |
| 5232 | { |
| 5233 | (*_bfd_error_handler) (_("%s: the target (%s) of a %s relocation is in the wrong output section (%s)"), |
| 5234 | bfd_archive_filename (input_bfd), |
| 5235 | sym_name, |
| 5236 | howto->name, |
| 5237 | name); |
| 5238 | |
| 5239 | bfd_set_error (bfd_error_bad_value); |
| 5240 | ret = FALSE; |
| 5241 | continue; |
| 5242 | } |
| 5243 | sh = htab->sdata2->sym_hash; |
| 5244 | addend -= (sh->root.u.def.value |
| 5245 | + sh->root.u.def.section->output_section->vma |
| 5246 | + sh->root.u.def.section->output_offset); |
| 5247 | } |
| 5248 | break; |
| 5249 | |
| 5250 | /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */ |
| 5251 | case R_PPC_EMB_SDA21: |
| 5252 | case R_PPC_EMB_RELSDA: |
| 5253 | { |
| 5254 | const char *name; |
| 5255 | const struct elf_link_hash_entry *sh; |
| 5256 | int reg; |
| 5257 | |
| 5258 | BFD_ASSERT (sec != (asection *) 0); |
| 5259 | name = bfd_get_section_name (abfd, sec->output_section); |
| 5260 | if (((strncmp (name, ".sdata", 6) == 0 |
| 5261 | && (name[6] == 0 || name[6] == '.')) |
| 5262 | || (strncmp (name, ".sbss", 5) == 0 |
| 5263 | && (name[5] == 0 || name[5] == '.')))) |
| 5264 | { |
| 5265 | reg = 13; |
| 5266 | sh = htab->sdata->sym_hash; |
| 5267 | addend -= (sh->root.u.def.value |
| 5268 | + sh->root.u.def.section->output_section->vma |
| 5269 | + sh->root.u.def.section->output_offset); |
| 5270 | } |
| 5271 | |
| 5272 | else if (strncmp (name, ".sdata2", 7) == 0 |
| 5273 | || strncmp (name, ".sbss2", 6) == 0) |
| 5274 | { |
| 5275 | reg = 2; |
| 5276 | sh = htab->sdata2->sym_hash; |
| 5277 | addend -= (sh->root.u.def.value |
| 5278 | + sh->root.u.def.section->output_section->vma |
| 5279 | + sh->root.u.def.section->output_offset); |
| 5280 | } |
| 5281 | |
| 5282 | else if (strcmp (name, ".PPC.EMB.sdata0") == 0 |
| 5283 | || strcmp (name, ".PPC.EMB.sbss0") == 0) |
| 5284 | { |
| 5285 | reg = 0; |
| 5286 | } |
| 5287 | |
| 5288 | else |
| 5289 | { |
| 5290 | (*_bfd_error_handler) (_("%s: the target (%s) of a %s relocation is in the wrong output section (%s)"), |
| 5291 | bfd_archive_filename (input_bfd), |
| 5292 | sym_name, |
| 5293 | howto->name, |
| 5294 | name); |
| 5295 | |
| 5296 | bfd_set_error (bfd_error_bad_value); |
| 5297 | ret = FALSE; |
| 5298 | continue; |
| 5299 | } |
| 5300 | |
| 5301 | if (r_type == R_PPC_EMB_SDA21) |
| 5302 | { /* fill in register field */ |
| 5303 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 5304 | insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); |
| 5305 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 5306 | } |
| 5307 | } |
| 5308 | break; |
| 5309 | |
| 5310 | /* Relocate against the beginning of the section. */ |
| 5311 | case R_PPC_SECTOFF: |
| 5312 | case R_PPC_SECTOFF_LO: |
| 5313 | case R_PPC_SECTOFF_HI: |
| 5314 | case R_PPC_SECTOFF_HA: |
| 5315 | BFD_ASSERT (sec != (asection *) 0); |
| 5316 | addend -= sec->output_section->vma; |
| 5317 | break; |
| 5318 | |
| 5319 | /* Negative relocations. */ |
| 5320 | case R_PPC_EMB_NADDR32: |
| 5321 | case R_PPC_EMB_NADDR16: |
| 5322 | case R_PPC_EMB_NADDR16_LO: |
| 5323 | case R_PPC_EMB_NADDR16_HI: |
| 5324 | case R_PPC_EMB_NADDR16_HA: |
| 5325 | addend -= 2 * relocation; |
| 5326 | break; |
| 5327 | |
| 5328 | case R_PPC_COPY: |
| 5329 | case R_PPC_GLOB_DAT: |
| 5330 | case R_PPC_JMP_SLOT: |
| 5331 | case R_PPC_RELATIVE: |
| 5332 | case R_PPC_PLT32: |
| 5333 | case R_PPC_PLTREL32: |
| 5334 | case R_PPC_PLT16_LO: |
| 5335 | case R_PPC_PLT16_HI: |
| 5336 | case R_PPC_PLT16_HA: |
| 5337 | case R_PPC_ADDR30: |
| 5338 | case R_PPC_EMB_RELSEC16: |
| 5339 | case R_PPC_EMB_RELST_LO: |
| 5340 | case R_PPC_EMB_RELST_HI: |
| 5341 | case R_PPC_EMB_RELST_HA: |
| 5342 | case R_PPC_EMB_BIT_FLD: |
| 5343 | (*_bfd_error_handler) |
| 5344 | (_("%s: relocation %s is not yet supported for symbol %s."), |
| 5345 | bfd_archive_filename (input_bfd), |
| 5346 | howto->name, |
| 5347 | sym_name); |
| 5348 | |
| 5349 | bfd_set_error (bfd_error_invalid_operation); |
| 5350 | ret = FALSE; |
| 5351 | continue; |
| 5352 | } |
| 5353 | |
| 5354 | /* Do any further special processing. */ |
| 5355 | switch (r_type) |
| 5356 | { |
| 5357 | default: |
| 5358 | break; |
| 5359 | |
| 5360 | case R_PPC_ADDR16_HA: |
| 5361 | case R_PPC_GOT16_HA: |
| 5362 | case R_PPC_PLT16_HA: |
| 5363 | case R_PPC_SECTOFF_HA: |
| 5364 | case R_PPC_TPREL16_HA: |
| 5365 | case R_PPC_DTPREL16_HA: |
| 5366 | case R_PPC_GOT_TLSGD16_HA: |
| 5367 | case R_PPC_GOT_TLSLD16_HA: |
| 5368 | case R_PPC_GOT_TPREL16_HA: |
| 5369 | case R_PPC_GOT_DTPREL16_HA: |
| 5370 | case R_PPC_EMB_NADDR16_HA: |
| 5371 | case R_PPC_EMB_RELST_HA: |
| 5372 | /* It's just possible that this symbol is a weak symbol |
| 5373 | that's not actually defined anywhere. In that case, |
| 5374 | 'sec' would be NULL, and we should leave the symbol |
| 5375 | alone (it will be set to zero elsewhere in the link). */ |
| 5376 | if (sec != NULL) |
| 5377 | /* Add 0x10000 if sign bit in 0:15 is set. |
| 5378 | Bits 0:15 are not used. */ |
| 5379 | addend += 0x8000; |
| 5380 | break; |
| 5381 | } |
| 5382 | |
| 5383 | #ifdef DEBUG |
| 5384 | fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n", |
| 5385 | howto->name, |
| 5386 | (int) r_type, |
| 5387 | sym_name, |
| 5388 | r_symndx, |
| 5389 | (long) rel->r_offset, |
| 5390 | (long) addend); |
| 5391 | #endif |
| 5392 | |
| 5393 | if (unresolved_reloc |
| 5394 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
| 5395 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) |
| 5396 | { |
| 5397 | (*_bfd_error_handler) |
| 5398 | (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"), |
| 5399 | bfd_archive_filename (input_bfd), |
| 5400 | bfd_get_section_name (input_bfd, input_section), |
| 5401 | (long) rel->r_offset, |
| 5402 | howto->name, |
| 5403 | sym_name); |
| 5404 | ret = FALSE; |
| 5405 | } |
| 5406 | |
| 5407 | r = _bfd_final_link_relocate (howto, |
| 5408 | input_bfd, |
| 5409 | input_section, |
| 5410 | contents, |
| 5411 | rel->r_offset, |
| 5412 | relocation, |
| 5413 | addend); |
| 5414 | |
| 5415 | if (r != bfd_reloc_ok) |
| 5416 | { |
| 5417 | if (sym_name == NULL) |
| 5418 | sym_name = "(null)"; |
| 5419 | if (r == bfd_reloc_overflow) |
| 5420 | { |
| 5421 | if (warned) |
| 5422 | continue; |
| 5423 | if (h != NULL |
| 5424 | && h->root.type == bfd_link_hash_undefweak |
| 5425 | && howto->pc_relative) |
| 5426 | { |
| 5427 | /* Assume this is a call protected by other code that |
| 5428 | detect the symbol is undefined. If this is the case, |
| 5429 | we can safely ignore the overflow. If not, the |
| 5430 | program is hosed anyway, and a little warning isn't |
| 5431 | going to help. */ |
| 5432 | |
| 5433 | continue; |
| 5434 | } |
| 5435 | |
| 5436 | if (! (*info->callbacks->reloc_overflow) (info, |
| 5437 | sym_name, |
| 5438 | howto->name, |
| 5439 | rel->r_addend, |
| 5440 | input_bfd, |
| 5441 | input_section, |
| 5442 | rel->r_offset)) |
| 5443 | return FALSE; |
| 5444 | } |
| 5445 | else |
| 5446 | { |
| 5447 | (*_bfd_error_handler) |
| 5448 | (_("%s(%s+0x%lx): %s reloc against `%s': error %d"), |
| 5449 | bfd_archive_filename (input_bfd), |
| 5450 | bfd_get_section_name (input_bfd, input_section), |
| 5451 | (long) rel->r_offset, howto->name, sym_name, (int) r); |
| 5452 | ret = FALSE; |
| 5453 | } |
| 5454 | } |
| 5455 | } |
| 5456 | |
| 5457 | #ifdef DEBUG |
| 5458 | fprintf (stderr, "\n"); |
| 5459 | #endif |
| 5460 | |
| 5461 | return ret; |
| 5462 | } |
| 5463 | |
| 5464 | static enum elf_reloc_type_class |
| 5465 | ppc_elf_reloc_type_class (rela) |
| 5466 | const Elf_Internal_Rela *rela; |
| 5467 | { |
| 5468 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 5469 | { |
| 5470 | case R_PPC_RELATIVE: |
| 5471 | return reloc_class_relative; |
| 5472 | case R_PPC_REL24: |
| 5473 | case R_PPC_ADDR24: |
| 5474 | case R_PPC_JMP_SLOT: |
| 5475 | return reloc_class_plt; |
| 5476 | case R_PPC_COPY: |
| 5477 | return reloc_class_copy; |
| 5478 | default: |
| 5479 | return reloc_class_normal; |
| 5480 | } |
| 5481 | } |
| 5482 | \f |
| 5483 | /* Support for core dump NOTE sections. */ |
| 5484 | |
| 5485 | static bfd_boolean |
| 5486 | ppc_elf_grok_prstatus (abfd, note) |
| 5487 | bfd *abfd; |
| 5488 | Elf_Internal_Note *note; |
| 5489 | { |
| 5490 | int offset; |
| 5491 | unsigned int raw_size; |
| 5492 | |
| 5493 | switch (note->descsz) |
| 5494 | { |
| 5495 | default: |
| 5496 | return FALSE; |
| 5497 | |
| 5498 | case 268: /* Linux/PPC. */ |
| 5499 | /* pr_cursig */ |
| 5500 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); |
| 5501 | |
| 5502 | /* pr_pid */ |
| 5503 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); |
| 5504 | |
| 5505 | /* pr_reg */ |
| 5506 | offset = 72; |
| 5507 | raw_size = 192; |
| 5508 | |
| 5509 | break; |
| 5510 | } |
| 5511 | |
| 5512 | /* Make a ".reg/999" section. */ |
| 5513 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 5514 | raw_size, note->descpos + offset); |
| 5515 | } |
| 5516 | |
| 5517 | static bfd_boolean |
| 5518 | ppc_elf_grok_psinfo (abfd, note) |
| 5519 | bfd *abfd; |
| 5520 | Elf_Internal_Note *note; |
| 5521 | { |
| 5522 | switch (note->descsz) |
| 5523 | { |
| 5524 | default: |
| 5525 | return FALSE; |
| 5526 | |
| 5527 | case 128: /* Linux/PPC elf_prpsinfo. */ |
| 5528 | elf_tdata (abfd)->core_program |
| 5529 | = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); |
| 5530 | elf_tdata (abfd)->core_command |
| 5531 | = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); |
| 5532 | } |
| 5533 | |
| 5534 | /* Note that for some reason, a spurious space is tacked |
| 5535 | onto the end of the args in some (at least one anyway) |
| 5536 | implementations, so strip it off if it exists. */ |
| 5537 | |
| 5538 | { |
| 5539 | char *command = elf_tdata (abfd)->core_command; |
| 5540 | int n = strlen (command); |
| 5541 | |
| 5542 | if (0 < n && command[n - 1] == ' ') |
| 5543 | command[n - 1] = '\0'; |
| 5544 | } |
| 5545 | |
| 5546 | return TRUE; |
| 5547 | } |
| 5548 | \f |
| 5549 | /* Very simple linked list structure for recording apuinfo values. */ |
| 5550 | typedef struct apuinfo_list |
| 5551 | { |
| 5552 | struct apuinfo_list *next; |
| 5553 | unsigned long value; |
| 5554 | } |
| 5555 | apuinfo_list; |
| 5556 | |
| 5557 | static apuinfo_list * head; |
| 5558 | |
| 5559 | static void apuinfo_list_init PARAMS ((void)); |
| 5560 | static void apuinfo_list_add PARAMS ((unsigned long)); |
| 5561 | static unsigned apuinfo_list_length PARAMS ((void)); |
| 5562 | static unsigned long apuinfo_list_element PARAMS ((unsigned long)); |
| 5563 | static void apuinfo_list_finish PARAMS ((void)); |
| 5564 | |
| 5565 | extern void ppc_elf_begin_write_processing |
| 5566 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 5567 | extern void ppc_elf_final_write_processing |
| 5568 | PARAMS ((bfd *, bfd_boolean)); |
| 5569 | extern bfd_boolean ppc_elf_write_section |
| 5570 | PARAMS ((bfd *, asection *, bfd_byte *)); |
| 5571 | |
| 5572 | |
| 5573 | static void |
| 5574 | apuinfo_list_init PARAMS ((void)) |
| 5575 | { |
| 5576 | head = NULL; |
| 5577 | } |
| 5578 | |
| 5579 | static void |
| 5580 | apuinfo_list_add (value) |
| 5581 | unsigned long value; |
| 5582 | { |
| 5583 | apuinfo_list *entry = head; |
| 5584 | |
| 5585 | while (entry != NULL) |
| 5586 | { |
| 5587 | if (entry->value == value) |
| 5588 | return; |
| 5589 | entry = entry->next; |
| 5590 | } |
| 5591 | |
| 5592 | entry = bfd_malloc (sizeof (* entry)); |
| 5593 | if (entry == NULL) |
| 5594 | return; |
| 5595 | |
| 5596 | entry->value = value; |
| 5597 | entry->next = head; |
| 5598 | head = entry; |
| 5599 | } |
| 5600 | |
| 5601 | static unsigned |
| 5602 | apuinfo_list_length PARAMS ((void)) |
| 5603 | { |
| 5604 | apuinfo_list *entry; |
| 5605 | unsigned long count; |
| 5606 | |
| 5607 | for (entry = head, count = 0; |
| 5608 | entry; |
| 5609 | entry = entry->next) |
| 5610 | ++ count; |
| 5611 | |
| 5612 | return count; |
| 5613 | } |
| 5614 | |
| 5615 | static inline unsigned long |
| 5616 | apuinfo_list_element (number) |
| 5617 | unsigned long number; |
| 5618 | { |
| 5619 | apuinfo_list * entry; |
| 5620 | |
| 5621 | for (entry = head; |
| 5622 | entry && number --; |
| 5623 | entry = entry->next) |
| 5624 | ; |
| 5625 | |
| 5626 | return entry ? entry->value : 0; |
| 5627 | } |
| 5628 | |
| 5629 | static void |
| 5630 | apuinfo_list_finish PARAMS ((void)) |
| 5631 | { |
| 5632 | apuinfo_list *entry; |
| 5633 | |
| 5634 | for (entry = head; entry;) |
| 5635 | { |
| 5636 | apuinfo_list *next = entry->next; |
| 5637 | free (entry); |
| 5638 | entry = next; |
| 5639 | } |
| 5640 | |
| 5641 | head = NULL; |
| 5642 | } |
| 5643 | |
| 5644 | #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo" |
| 5645 | #define APUINFO_LABEL "APUinfo" |
| 5646 | |
| 5647 | /* Scan the input BFDs and create a linked list of |
| 5648 | the APUinfo values that will need to be emitted. */ |
| 5649 | |
| 5650 | void |
| 5651 | ppc_elf_begin_write_processing (abfd, link_info) |
| 5652 | bfd *abfd; |
| 5653 | struct bfd_link_info *link_info; |
| 5654 | { |
| 5655 | bfd *ibfd; |
| 5656 | asection *asec; |
| 5657 | char *buffer; |
| 5658 | unsigned num_input_sections; |
| 5659 | bfd_size_type output_section_size; |
| 5660 | unsigned i; |
| 5661 | unsigned num_entries; |
| 5662 | unsigned long offset; |
| 5663 | unsigned long length; |
| 5664 | const char *error_message = NULL; |
| 5665 | |
| 5666 | if (link_info == NULL) |
| 5667 | return; |
| 5668 | |
| 5669 | /* Scan the input bfds, looking for apuinfo sections. */ |
| 5670 | num_input_sections = 0; |
| 5671 | output_section_size = 0; |
| 5672 | |
| 5673 | for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) |
| 5674 | { |
| 5675 | asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); |
| 5676 | if (asec) |
| 5677 | { |
| 5678 | ++ num_input_sections; |
| 5679 | output_section_size += asec->_raw_size; |
| 5680 | } |
| 5681 | } |
| 5682 | |
| 5683 | /* We need at least one input sections |
| 5684 | in order to make merging worthwhile. */ |
| 5685 | if (num_input_sections < 1) |
| 5686 | return; |
| 5687 | |
| 5688 | /* Just make sure that the output section exists as well. */ |
| 5689 | asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); |
| 5690 | if (asec == NULL) |
| 5691 | return; |
| 5692 | |
| 5693 | /* Allocate a buffer for the contents of the input sections. */ |
| 5694 | buffer = bfd_malloc (output_section_size); |
| 5695 | if (buffer == NULL) |
| 5696 | return; |
| 5697 | |
| 5698 | offset = 0; |
| 5699 | apuinfo_list_init (); |
| 5700 | |
| 5701 | /* Read in the input sections contents. */ |
| 5702 | for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) |
| 5703 | { |
| 5704 | unsigned long datum; |
| 5705 | char *ptr; |
| 5706 | |
| 5707 | asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); |
| 5708 | if (asec == NULL) |
| 5709 | continue; |
| 5710 | |
| 5711 | length = asec->_raw_size; |
| 5712 | if (length < 24) |
| 5713 | { |
| 5714 | error_message = _("corrupt or empty %s section in %s"); |
| 5715 | goto fail; |
| 5716 | } |
| 5717 | |
| 5718 | if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0 |
| 5719 | || (bfd_bread (buffer + offset, length, ibfd) != length)) |
| 5720 | { |
| 5721 | error_message = _("unable to read in %s section from %s"); |
| 5722 | goto fail; |
| 5723 | } |
| 5724 | |
| 5725 | /* Process the contents of the section. */ |
| 5726 | ptr = buffer + offset; |
| 5727 | error_message = _("corrupt %s section in %s"); |
| 5728 | |
| 5729 | /* Verify the contents of the header. Note - we have to |
| 5730 | extract the values this way in order to allow for a |
| 5731 | host whose endian-ness is different from the target. */ |
| 5732 | datum = bfd_get_32 (ibfd, ptr); |
| 5733 | if (datum != sizeof APUINFO_LABEL) |
| 5734 | goto fail; |
| 5735 | |
| 5736 | datum = bfd_get_32 (ibfd, ptr + 8); |
| 5737 | if (datum != 0x2) |
| 5738 | goto fail; |
| 5739 | |
| 5740 | if (strcmp (ptr + 12, APUINFO_LABEL) != 0) |
| 5741 | goto fail; |
| 5742 | |
| 5743 | /* Get the number of apuinfo entries. */ |
| 5744 | datum = bfd_get_32 (ibfd, ptr + 4); |
| 5745 | if ((datum * 4 + 20) != length) |
| 5746 | goto fail; |
| 5747 | |
| 5748 | /* Make sure that we do not run off the end of the section. */ |
| 5749 | if (offset + length > output_section_size) |
| 5750 | goto fail; |
| 5751 | |
| 5752 | /* Scan the apuinfo section, building a list of apuinfo numbers. */ |
| 5753 | for (i = 0; i < datum; i++) |
| 5754 | apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + (i * 4))); |
| 5755 | |
| 5756 | /* Update the offset. */ |
| 5757 | offset += length; |
| 5758 | } |
| 5759 | |
| 5760 | error_message = NULL; |
| 5761 | |
| 5762 | /* Compute the size of the output section. */ |
| 5763 | num_entries = apuinfo_list_length (); |
| 5764 | output_section_size = 20 + num_entries * 4; |
| 5765 | |
| 5766 | asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); |
| 5767 | |
| 5768 | if (! bfd_set_section_size (abfd, asec, output_section_size)) |
| 5769 | ibfd = abfd, |
| 5770 | error_message = _("warning: unable to set size of %s section in %s"); |
| 5771 | |
| 5772 | fail: |
| 5773 | free (buffer); |
| 5774 | |
| 5775 | if (error_message) |
| 5776 | (*_bfd_error_handler) (error_message, APUINFO_SECTION_NAME, |
| 5777 | bfd_archive_filename (ibfd)); |
| 5778 | } |
| 5779 | |
| 5780 | |
| 5781 | /* Prevent the output section from accumulating the input sections' |
| 5782 | contents. We have already stored this in our linked list structure. */ |
| 5783 | |
| 5784 | bfd_boolean |
| 5785 | ppc_elf_write_section (abfd, asec, contents) |
| 5786 | bfd *abfd ATTRIBUTE_UNUSED; |
| 5787 | asection *asec; |
| 5788 | bfd_byte *contents ATTRIBUTE_UNUSED; |
| 5789 | { |
| 5790 | return (apuinfo_list_length () |
| 5791 | && strcmp (asec->name, APUINFO_SECTION_NAME) == 0); |
| 5792 | } |
| 5793 | |
| 5794 | |
| 5795 | /* Finally we can generate the output section. */ |
| 5796 | |
| 5797 | void |
| 5798 | ppc_elf_final_write_processing (abfd, linker) |
| 5799 | bfd *abfd; |
| 5800 | bfd_boolean linker ATTRIBUTE_UNUSED; |
| 5801 | { |
| 5802 | bfd_byte *buffer; |
| 5803 | asection *asec; |
| 5804 | unsigned i; |
| 5805 | unsigned num_entries; |
| 5806 | bfd_size_type length; |
| 5807 | |
| 5808 | asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); |
| 5809 | if (asec == NULL) |
| 5810 | return; |
| 5811 | |
| 5812 | if (apuinfo_list_length () == 0) |
| 5813 | return; |
| 5814 | |
| 5815 | length = asec->_raw_size; |
| 5816 | if (length < 20) |
| 5817 | return; |
| 5818 | |
| 5819 | buffer = bfd_malloc (length); |
| 5820 | if (buffer == NULL) |
| 5821 | { |
| 5822 | (*_bfd_error_handler) |
| 5823 | (_("failed to allocate space for new APUinfo section.")); |
| 5824 | return; |
| 5825 | } |
| 5826 | |
| 5827 | /* Create the apuinfo header. */ |
| 5828 | num_entries = apuinfo_list_length (); |
| 5829 | bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer); |
| 5830 | bfd_put_32 (abfd, num_entries, buffer + 4); |
| 5831 | bfd_put_32 (abfd, 0x2, buffer + 8); |
| 5832 | strcpy (buffer + 12, APUINFO_LABEL); |
| 5833 | |
| 5834 | length = 20; |
| 5835 | for (i = 0; i < num_entries; i++) |
| 5836 | { |
| 5837 | bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length); |
| 5838 | length += 4; |
| 5839 | } |
| 5840 | |
| 5841 | if (length != asec->_raw_size) |
| 5842 | (*_bfd_error_handler) (_("failed to compute new APUinfo section.")); |
| 5843 | |
| 5844 | if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length)) |
| 5845 | (*_bfd_error_handler) (_("failed to install new APUinfo section.")); |
| 5846 | |
| 5847 | free (buffer); |
| 5848 | |
| 5849 | apuinfo_list_finish (); |
| 5850 | } |
| 5851 | \f |
| 5852 | #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec |
| 5853 | #define TARGET_LITTLE_NAME "elf32-powerpcle" |
| 5854 | #define TARGET_BIG_SYM bfd_elf32_powerpc_vec |
| 5855 | #define TARGET_BIG_NAME "elf32-powerpc" |
| 5856 | #define ELF_ARCH bfd_arch_powerpc |
| 5857 | #define ELF_MACHINE_CODE EM_PPC |
| 5858 | #define ELF_MAXPAGESIZE 0x10000 |
| 5859 | #define elf_info_to_howto ppc_elf_info_to_howto |
| 5860 | |
| 5861 | #ifdef EM_CYGNUS_POWERPC |
| 5862 | #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC |
| 5863 | #endif |
| 5864 | |
| 5865 | #ifdef EM_PPC_OLD |
| 5866 | #define ELF_MACHINE_ALT2 EM_PPC_OLD |
| 5867 | #endif |
| 5868 | |
| 5869 | #define elf_backend_plt_not_loaded 1 |
| 5870 | #define elf_backend_got_symbol_offset 4 |
| 5871 | #define elf_backend_can_gc_sections 1 |
| 5872 | #define elf_backend_can_refcount 1 |
| 5873 | #define elf_backend_got_header_size 12 |
| 5874 | #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE |
| 5875 | #define elf_backend_rela_normal 1 |
| 5876 | |
| 5877 | #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data |
| 5878 | #define bfd_elf32_bfd_relax_section ppc_elf_relax_section |
| 5879 | #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup |
| 5880 | #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags |
| 5881 | #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create |
| 5882 | |
| 5883 | #define elf_backend_object_p ppc_elf_object_p |
| 5884 | #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook |
| 5885 | #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook |
| 5886 | #define elf_backend_section_from_shdr ppc_elf_section_from_shdr |
| 5887 | #define elf_backend_relocate_section ppc_elf_relocate_section |
| 5888 | #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections |
| 5889 | #define elf_backend_check_relocs ppc_elf_check_relocs |
| 5890 | #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol |
| 5891 | #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol |
| 5892 | #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook |
| 5893 | #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections |
| 5894 | #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol |
| 5895 | #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections |
| 5896 | #define elf_backend_fake_sections ppc_elf_fake_sections |
| 5897 | #define elf_backend_additional_program_headers ppc_elf_additional_program_headers |
| 5898 | #define elf_backend_modify_segment_map ppc_elf_modify_segment_map |
| 5899 | #define elf_backend_grok_prstatus ppc_elf_grok_prstatus |
| 5900 | #define elf_backend_grok_psinfo ppc_elf_grok_psinfo |
| 5901 | #define elf_backend_reloc_type_class ppc_elf_reloc_type_class |
| 5902 | #define elf_backend_begin_write_processing ppc_elf_begin_write_processing |
| 5903 | #define elf_backend_final_write_processing ppc_elf_final_write_processing |
| 5904 | #define elf_backend_write_section ppc_elf_write_section |
| 5905 | |
| 5906 | #include "elf32-target.h" |