| 1 | /* Alpha specific support for 64-bit ELF |
| 2 | Copyright 1996, 1997, 1998, 1999, 2000, 2001 |
| 3 | Free Software Foundation, Inc. |
| 4 | Contributed by Richard Henderson <rth@tamu.edu>. |
| 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 Free Software |
| 20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | /* We need a published ABI spec for this. Until one comes out, don't |
| 23 | assume this'll remain unchanged forever. */ |
| 24 | |
| 25 | #include "bfd.h" |
| 26 | #include "sysdep.h" |
| 27 | #include "libbfd.h" |
| 28 | #include "elf-bfd.h" |
| 29 | |
| 30 | #include "elf/alpha.h" |
| 31 | |
| 32 | #define ALPHAECOFF |
| 33 | |
| 34 | #define NO_COFF_RELOCS |
| 35 | #define NO_COFF_SYMBOLS |
| 36 | #define NO_COFF_LINENOS |
| 37 | |
| 38 | /* Get the ECOFF swapping routines. Needed for the debug information. */ |
| 39 | #include "coff/internal.h" |
| 40 | #include "coff/sym.h" |
| 41 | #include "coff/symconst.h" |
| 42 | #include "coff/ecoff.h" |
| 43 | #include "coff/alpha.h" |
| 44 | #include "aout/ar.h" |
| 45 | #include "libcoff.h" |
| 46 | #include "libecoff.h" |
| 47 | #define ECOFF_64 |
| 48 | #include "ecoffswap.h" |
| 49 | |
| 50 | static int alpha_elf_dynamic_symbol_p |
| 51 | PARAMS((struct elf_link_hash_entry *, struct bfd_link_info *)); |
| 52 | static struct bfd_hash_entry * elf64_alpha_link_hash_newfunc |
| 53 | PARAMS((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| 54 | static struct bfd_link_hash_table * elf64_alpha_bfd_link_hash_table_create |
| 55 | PARAMS((bfd *)); |
| 56 | |
| 57 | static bfd_reloc_status_type elf64_alpha_reloc_nil |
| 58 | PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 59 | static bfd_reloc_status_type elf64_alpha_reloc_bad |
| 60 | PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 61 | static bfd_reloc_status_type elf64_alpha_do_reloc_gpdisp |
| 62 | PARAMS((bfd *, bfd_vma, bfd_byte *, bfd_byte *)); |
| 63 | static bfd_reloc_status_type elf64_alpha_reloc_gpdisp |
| 64 | PARAMS((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 65 | |
| 66 | static reloc_howto_type * elf64_alpha_bfd_reloc_type_lookup |
| 67 | PARAMS((bfd *, bfd_reloc_code_real_type)); |
| 68 | static void elf64_alpha_info_to_howto |
| 69 | PARAMS((bfd *, arelent *, Elf64_Internal_Rela *)); |
| 70 | |
| 71 | static boolean elf64_alpha_mkobject |
| 72 | PARAMS((bfd *)); |
| 73 | static boolean elf64_alpha_object_p |
| 74 | PARAMS((bfd *)); |
| 75 | static boolean elf64_alpha_section_from_shdr |
| 76 | PARAMS((bfd *, Elf64_Internal_Shdr *, char *)); |
| 77 | static boolean elf64_alpha_fake_sections |
| 78 | PARAMS((bfd *, Elf64_Internal_Shdr *, asection *)); |
| 79 | static boolean elf64_alpha_create_got_section |
| 80 | PARAMS((bfd *, struct bfd_link_info *)); |
| 81 | static boolean elf64_alpha_create_dynamic_sections |
| 82 | PARAMS((bfd *, struct bfd_link_info *)); |
| 83 | |
| 84 | static boolean elf64_alpha_read_ecoff_info |
| 85 | PARAMS((bfd *, asection *, struct ecoff_debug_info *)); |
| 86 | static boolean elf64_alpha_is_local_label_name |
| 87 | PARAMS((bfd *, const char *)); |
| 88 | static boolean elf64_alpha_find_nearest_line |
| 89 | PARAMS((bfd *, asection *, asymbol **, bfd_vma, const char **, |
| 90 | const char **, unsigned int *)); |
| 91 | |
| 92 | #if defined(__STDC__) || defined(ALMOST_STDC) |
| 93 | struct alpha_elf_link_hash_entry; |
| 94 | #endif |
| 95 | |
| 96 | static boolean elf64_alpha_output_extsym |
| 97 | PARAMS((struct alpha_elf_link_hash_entry *, PTR)); |
| 98 | |
| 99 | static boolean elf64_alpha_can_merge_gots |
| 100 | PARAMS((bfd *, bfd *)); |
| 101 | static void elf64_alpha_merge_gots |
| 102 | PARAMS((bfd *, bfd *)); |
| 103 | static boolean elf64_alpha_calc_got_offsets_for_symbol |
| 104 | PARAMS ((struct alpha_elf_link_hash_entry *, PTR)); |
| 105 | static void elf64_alpha_calc_got_offsets PARAMS ((struct bfd_link_info *)); |
| 106 | static boolean elf64_alpha_size_got_sections |
| 107 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 108 | static boolean elf64_alpha_always_size_sections |
| 109 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 110 | static boolean elf64_alpha_calc_dynrel_sizes |
| 111 | PARAMS ((struct alpha_elf_link_hash_entry *, struct bfd_link_info *)); |
| 112 | static boolean elf64_alpha_add_symbol_hook |
| 113 | PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, |
| 114 | const char **, flagword *, asection **, bfd_vma *)); |
| 115 | static boolean elf64_alpha_check_relocs |
| 116 | PARAMS((bfd *, struct bfd_link_info *, asection *sec, |
| 117 | const Elf_Internal_Rela *)); |
| 118 | static boolean elf64_alpha_adjust_dynamic_symbol |
| 119 | PARAMS((struct bfd_link_info *, struct elf_link_hash_entry *)); |
| 120 | static boolean elf64_alpha_size_dynamic_sections |
| 121 | PARAMS((bfd *, struct bfd_link_info *)); |
| 122 | static boolean elf64_alpha_relocate_section |
| 123 | PARAMS((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| 124 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
| 125 | static boolean elf64_alpha_finish_dynamic_symbol |
| 126 | PARAMS((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
| 127 | Elf_Internal_Sym *)); |
| 128 | static boolean elf64_alpha_finish_dynamic_sections |
| 129 | PARAMS((bfd *, struct bfd_link_info *)); |
| 130 | static boolean elf64_alpha_final_link |
| 131 | PARAMS((bfd *, struct bfd_link_info *)); |
| 132 | static boolean elf64_alpha_merge_ind_symbols |
| 133 | PARAMS((struct alpha_elf_link_hash_entry *, PTR)); |
| 134 | static Elf_Internal_Rela * elf64_alpha_find_reloc_at_ofs |
| 135 | PARAMS ((Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_vma, int)); |
| 136 | static enum elf_reloc_type_class elf64_alpha_reloc_type_class |
| 137 | PARAMS ((int)); |
| 138 | \f |
| 139 | struct alpha_elf_link_hash_entry |
| 140 | { |
| 141 | struct elf_link_hash_entry root; |
| 142 | |
| 143 | /* External symbol information. */ |
| 144 | EXTR esym; |
| 145 | |
| 146 | /* Cumulative flags for all the .got entries. */ |
| 147 | int flags; |
| 148 | |
| 149 | /* Contexts (LITUSE) in which a literal was referenced. */ |
| 150 | #define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01 |
| 151 | #define ALPHA_ELF_LINK_HASH_LU_MEM 0x02 |
| 152 | #define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04 |
| 153 | #define ALPHA_ELF_LINK_HASH_LU_FUNC 0x08 |
| 154 | |
| 155 | /* Used to implement multiple .got subsections. */ |
| 156 | struct alpha_elf_got_entry |
| 157 | { |
| 158 | struct alpha_elf_got_entry *next; |
| 159 | |
| 160 | /* which .got subsection? */ |
| 161 | bfd *gotobj; |
| 162 | |
| 163 | /* the addend in effect for this entry. */ |
| 164 | bfd_signed_vma addend; |
| 165 | |
| 166 | /* the .got offset for this entry. */ |
| 167 | int got_offset; |
| 168 | |
| 169 | int flags; |
| 170 | |
| 171 | /* An additional flag. */ |
| 172 | #define ALPHA_ELF_GOT_ENTRY_RELOCS_DONE 0x10 |
| 173 | |
| 174 | int use_count; |
| 175 | } *got_entries; |
| 176 | |
| 177 | /* used to count non-got, non-plt relocations for delayed sizing |
| 178 | of relocation sections. */ |
| 179 | struct alpha_elf_reloc_entry |
| 180 | { |
| 181 | struct alpha_elf_reloc_entry *next; |
| 182 | |
| 183 | /* which .reloc section? */ |
| 184 | asection *srel; |
| 185 | |
| 186 | /* what kind of relocation? */ |
| 187 | unsigned int rtype; |
| 188 | |
| 189 | /* is this against read-only section? */ |
| 190 | unsigned int reltext : 1; |
| 191 | |
| 192 | /* how many did we find? */ |
| 193 | unsigned long count; |
| 194 | } *reloc_entries; |
| 195 | }; |
| 196 | |
| 197 | /* Alpha ELF linker hash table. */ |
| 198 | |
| 199 | struct alpha_elf_link_hash_table |
| 200 | { |
| 201 | struct elf_link_hash_table root; |
| 202 | |
| 203 | /* The head of a list of .got subsections linked through |
| 204 | alpha_elf_tdata(abfd)->got_link_next. */ |
| 205 | bfd *got_list; |
| 206 | }; |
| 207 | |
| 208 | /* Look up an entry in a Alpha ELF linker hash table. */ |
| 209 | |
| 210 | #define alpha_elf_link_hash_lookup(table, string, create, copy, follow) \ |
| 211 | ((struct alpha_elf_link_hash_entry *) \ |
| 212 | elf_link_hash_lookup (&(table)->root, (string), (create), \ |
| 213 | (copy), (follow))) |
| 214 | |
| 215 | /* Traverse a Alpha ELF linker hash table. */ |
| 216 | |
| 217 | #define alpha_elf_link_hash_traverse(table, func, info) \ |
| 218 | (elf_link_hash_traverse \ |
| 219 | (&(table)->root, \ |
| 220 | (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ |
| 221 | (info))) |
| 222 | |
| 223 | /* Get the Alpha ELF linker hash table from a link_info structure. */ |
| 224 | |
| 225 | #define alpha_elf_hash_table(p) \ |
| 226 | ((struct alpha_elf_link_hash_table *) ((p)->hash)) |
| 227 | |
| 228 | /* Get the object's symbols as our own entry type. */ |
| 229 | |
| 230 | #define alpha_elf_sym_hashes(abfd) \ |
| 231 | ((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd)) |
| 232 | |
| 233 | /* Should we do dynamic things to this symbol? */ |
| 234 | |
| 235 | static int |
| 236 | alpha_elf_dynamic_symbol_p (h, info) |
| 237 | struct elf_link_hash_entry *h; |
| 238 | struct bfd_link_info *info; |
| 239 | { |
| 240 | if (h == NULL) |
| 241 | return false; |
| 242 | |
| 243 | while (h->root.type == bfd_link_hash_indirect |
| 244 | || h->root.type == bfd_link_hash_warning) |
| 245 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 246 | |
| 247 | if (h->dynindx == -1) |
| 248 | return false; |
| 249 | |
| 250 | if (h->root.type == bfd_link_hash_undefweak |
| 251 | || h->root.type == bfd_link_hash_defweak) |
| 252 | return true; |
| 253 | |
| 254 | switch (ELF_ST_VISIBILITY (h->other)) |
| 255 | { |
| 256 | case STV_DEFAULT: |
| 257 | break; |
| 258 | case STV_HIDDEN: |
| 259 | case STV_INTERNAL: |
| 260 | return false; |
| 261 | case STV_PROTECTED: |
| 262 | if (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) |
| 263 | return false; |
| 264 | break; |
| 265 | } |
| 266 | |
| 267 | if ((info->shared && !info->symbolic) |
| 268 | || ((h->elf_link_hash_flags |
| 269 | & (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR)) |
| 270 | == (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR))) |
| 271 | return true; |
| 272 | |
| 273 | return false; |
| 274 | } |
| 275 | |
| 276 | /* Create an entry in a Alpha ELF linker hash table. */ |
| 277 | |
| 278 | static struct bfd_hash_entry * |
| 279 | elf64_alpha_link_hash_newfunc (entry, table, string) |
| 280 | struct bfd_hash_entry *entry; |
| 281 | struct bfd_hash_table *table; |
| 282 | const char *string; |
| 283 | { |
| 284 | struct alpha_elf_link_hash_entry *ret = |
| 285 | (struct alpha_elf_link_hash_entry *) entry; |
| 286 | |
| 287 | /* Allocate the structure if it has not already been allocated by a |
| 288 | subclass. */ |
| 289 | if (ret == (struct alpha_elf_link_hash_entry *) NULL) |
| 290 | ret = ((struct alpha_elf_link_hash_entry *) |
| 291 | bfd_hash_allocate (table, |
| 292 | sizeof (struct alpha_elf_link_hash_entry))); |
| 293 | if (ret == (struct alpha_elf_link_hash_entry *) NULL) |
| 294 | return (struct bfd_hash_entry *) ret; |
| 295 | |
| 296 | /* Call the allocation method of the superclass. */ |
| 297 | ret = ((struct alpha_elf_link_hash_entry *) |
| 298 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 299 | table, string)); |
| 300 | if (ret != (struct alpha_elf_link_hash_entry *) NULL) |
| 301 | { |
| 302 | /* Set local fields. */ |
| 303 | memset (&ret->esym, 0, sizeof (EXTR)); |
| 304 | /* We use -2 as a marker to indicate that the information has |
| 305 | not been set. -1 means there is no associated ifd. */ |
| 306 | ret->esym.ifd = -2; |
| 307 | ret->flags = 0; |
| 308 | ret->got_entries = NULL; |
| 309 | ret->reloc_entries = NULL; |
| 310 | } |
| 311 | |
| 312 | return (struct bfd_hash_entry *) ret; |
| 313 | } |
| 314 | |
| 315 | /* Create a Alpha ELF linker hash table. */ |
| 316 | |
| 317 | static struct bfd_link_hash_table * |
| 318 | elf64_alpha_bfd_link_hash_table_create (abfd) |
| 319 | bfd *abfd; |
| 320 | { |
| 321 | struct alpha_elf_link_hash_table *ret; |
| 322 | |
| 323 | ret = ((struct alpha_elf_link_hash_table *) |
| 324 | bfd_zalloc (abfd, sizeof (struct alpha_elf_link_hash_table))); |
| 325 | if (ret == (struct alpha_elf_link_hash_table *) NULL) |
| 326 | return NULL; |
| 327 | |
| 328 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 329 | elf64_alpha_link_hash_newfunc)) |
| 330 | { |
| 331 | bfd_release (abfd, ret); |
| 332 | return NULL; |
| 333 | } |
| 334 | |
| 335 | return &ret->root.root; |
| 336 | } |
| 337 | \f |
| 338 | /* We have some private fields hanging off of the elf_tdata structure. */ |
| 339 | |
| 340 | struct alpha_elf_obj_tdata |
| 341 | { |
| 342 | struct elf_obj_tdata root; |
| 343 | |
| 344 | /* For every input file, these are the got entries for that object's |
| 345 | local symbols. */ |
| 346 | struct alpha_elf_got_entry ** local_got_entries; |
| 347 | |
| 348 | /* For every input file, this is the object that owns the got that |
| 349 | this input file uses. */ |
| 350 | bfd *gotobj; |
| 351 | |
| 352 | /* For every got, this is a linked list through the objects using this got */ |
| 353 | bfd *in_got_link_next; |
| 354 | |
| 355 | /* For every got, this is a link to the next got subsegment. */ |
| 356 | bfd *got_link_next; |
| 357 | |
| 358 | /* For every got, this is the section. */ |
| 359 | asection *got; |
| 360 | |
| 361 | /* For every got, this is it's total number of *entries*. */ |
| 362 | int total_got_entries; |
| 363 | |
| 364 | /* For every got, this is the sum of the number of *entries* required |
| 365 | to hold all of the member object's local got. */ |
| 366 | int n_local_got_entries; |
| 367 | }; |
| 368 | |
| 369 | #define alpha_elf_tdata(abfd) \ |
| 370 | ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any) |
| 371 | |
| 372 | static boolean |
| 373 | elf64_alpha_mkobject (abfd) |
| 374 | bfd *abfd; |
| 375 | { |
| 376 | abfd->tdata.any = bfd_zalloc (abfd, sizeof (struct alpha_elf_obj_tdata)); |
| 377 | if (abfd->tdata.any == NULL) |
| 378 | return false; |
| 379 | return true; |
| 380 | } |
| 381 | |
| 382 | static boolean |
| 383 | elf64_alpha_object_p (abfd) |
| 384 | bfd *abfd; |
| 385 | { |
| 386 | /* Allocate our special target data. */ |
| 387 | struct alpha_elf_obj_tdata *new_tdata; |
| 388 | new_tdata = bfd_zalloc (abfd, sizeof (struct alpha_elf_obj_tdata)); |
| 389 | if (new_tdata == NULL) |
| 390 | return false; |
| 391 | new_tdata->root = *abfd->tdata.elf_obj_data; |
| 392 | abfd->tdata.any = new_tdata; |
| 393 | |
| 394 | /* Set the right machine number for an Alpha ELF file. */ |
| 395 | return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0); |
| 396 | } |
| 397 | \f |
| 398 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value |
| 399 | from smaller values. Start with zero, widen, *then* decrement. */ |
| 400 | #define MINUS_ONE (((bfd_vma)0) - 1) |
| 401 | |
| 402 | static reloc_howto_type elf64_alpha_howto_table[] = |
| 403 | { |
| 404 | HOWTO (R_ALPHA_NONE, /* type */ |
| 405 | 0, /* rightshift */ |
| 406 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 407 | 8, /* bitsize */ |
| 408 | true, /* pc_relative */ |
| 409 | 0, /* bitpos */ |
| 410 | complain_overflow_dont, /* complain_on_overflow */ |
| 411 | elf64_alpha_reloc_nil, /* special_function */ |
| 412 | "NONE", /* name */ |
| 413 | false, /* partial_inplace */ |
| 414 | 0, /* src_mask */ |
| 415 | 0, /* dst_mask */ |
| 416 | true), /* pcrel_offset */ |
| 417 | |
| 418 | /* A 32 bit reference to a symbol. */ |
| 419 | HOWTO (R_ALPHA_REFLONG, /* type */ |
| 420 | 0, /* rightshift */ |
| 421 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 422 | 32, /* bitsize */ |
| 423 | false, /* pc_relative */ |
| 424 | 0, /* bitpos */ |
| 425 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 426 | 0, /* special_function */ |
| 427 | "REFLONG", /* name */ |
| 428 | false, /* partial_inplace */ |
| 429 | 0xffffffff, /* src_mask */ |
| 430 | 0xffffffff, /* dst_mask */ |
| 431 | false), /* pcrel_offset */ |
| 432 | |
| 433 | /* A 64 bit reference to a symbol. */ |
| 434 | HOWTO (R_ALPHA_REFQUAD, /* type */ |
| 435 | 0, /* rightshift */ |
| 436 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 437 | 64, /* bitsize */ |
| 438 | false, /* pc_relative */ |
| 439 | 0, /* bitpos */ |
| 440 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 441 | 0, /* special_function */ |
| 442 | "REFQUAD", /* name */ |
| 443 | false, /* partial_inplace */ |
| 444 | MINUS_ONE, /* src_mask */ |
| 445 | MINUS_ONE, /* dst_mask */ |
| 446 | false), /* pcrel_offset */ |
| 447 | |
| 448 | /* A 32 bit GP relative offset. This is just like REFLONG except |
| 449 | that when the value is used the value of the gp register will be |
| 450 | added in. */ |
| 451 | HOWTO (R_ALPHA_GPREL32, /* type */ |
| 452 | 0, /* rightshift */ |
| 453 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 454 | 32, /* bitsize */ |
| 455 | false, /* pc_relative */ |
| 456 | 0, /* bitpos */ |
| 457 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 458 | 0, /* special_function */ |
| 459 | "GPREL32", /* name */ |
| 460 | false, /* partial_inplace */ |
| 461 | 0xffffffff, /* src_mask */ |
| 462 | 0xffffffff, /* dst_mask */ |
| 463 | false), /* pcrel_offset */ |
| 464 | |
| 465 | /* Used for an instruction that refers to memory off the GP register. */ |
| 466 | HOWTO (R_ALPHA_LITERAL, /* type */ |
| 467 | 0, /* rightshift */ |
| 468 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 469 | 16, /* bitsize */ |
| 470 | false, /* pc_relative */ |
| 471 | 0, /* bitpos */ |
| 472 | complain_overflow_signed, /* complain_on_overflow */ |
| 473 | 0, /* special_function */ |
| 474 | "ELF_LITERAL", /* name */ |
| 475 | false, /* partial_inplace */ |
| 476 | 0xffff, /* src_mask */ |
| 477 | 0xffff, /* dst_mask */ |
| 478 | false), /* pcrel_offset */ |
| 479 | |
| 480 | /* This reloc only appears immediately following an ELF_LITERAL reloc. |
| 481 | It identifies a use of the literal. The symbol index is special: |
| 482 | 1 means the literal address is in the base register of a memory |
| 483 | format instruction; 2 means the literal address is in the byte |
| 484 | offset register of a byte-manipulation instruction; 3 means the |
| 485 | literal address is in the target register of a jsr instruction. |
| 486 | This does not actually do any relocation. */ |
| 487 | HOWTO (R_ALPHA_LITUSE, /* type */ |
| 488 | 0, /* rightshift */ |
| 489 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 490 | 32, /* bitsize */ |
| 491 | false, /* pc_relative */ |
| 492 | 0, /* bitpos */ |
| 493 | complain_overflow_dont, /* complain_on_overflow */ |
| 494 | elf64_alpha_reloc_nil, /* special_function */ |
| 495 | "LITUSE", /* name */ |
| 496 | false, /* partial_inplace */ |
| 497 | 0, /* src_mask */ |
| 498 | 0, /* dst_mask */ |
| 499 | false), /* pcrel_offset */ |
| 500 | |
| 501 | /* Load the gp register. This is always used for a ldah instruction |
| 502 | which loads the upper 16 bits of the gp register. The symbol |
| 503 | index of the GPDISP instruction is an offset in bytes to the lda |
| 504 | instruction that loads the lower 16 bits. The value to use for |
| 505 | the relocation is the difference between the GP value and the |
| 506 | current location; the load will always be done against a register |
| 507 | holding the current address. |
| 508 | |
| 509 | NOTE: Unlike ECOFF, partial in-place relocation is not done. If |
| 510 | any offset is present in the instructions, it is an offset from |
| 511 | the register to the ldah instruction. This lets us avoid any |
| 512 | stupid hackery like inventing a gp value to do partial relocation |
| 513 | against. Also unlike ECOFF, we do the whole relocation off of |
| 514 | the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd, |
| 515 | space consuming bit, that, since all the information was present |
| 516 | in the GPDISP_HI16 reloc. */ |
| 517 | HOWTO (R_ALPHA_GPDISP, /* type */ |
| 518 | 16, /* rightshift */ |
| 519 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 520 | 16, /* bitsize */ |
| 521 | false, /* pc_relative */ |
| 522 | 0, /* bitpos */ |
| 523 | complain_overflow_dont, /* complain_on_overflow */ |
| 524 | elf64_alpha_reloc_gpdisp, /* special_function */ |
| 525 | "GPDISP", /* name */ |
| 526 | false, /* partial_inplace */ |
| 527 | 0xffff, /* src_mask */ |
| 528 | 0xffff, /* dst_mask */ |
| 529 | true), /* pcrel_offset */ |
| 530 | |
| 531 | /* A 21 bit branch. */ |
| 532 | HOWTO (R_ALPHA_BRADDR, /* type */ |
| 533 | 2, /* rightshift */ |
| 534 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 535 | 21, /* bitsize */ |
| 536 | true, /* pc_relative */ |
| 537 | 0, /* bitpos */ |
| 538 | complain_overflow_signed, /* complain_on_overflow */ |
| 539 | 0, /* special_function */ |
| 540 | "BRADDR", /* name */ |
| 541 | false, /* partial_inplace */ |
| 542 | 0x1fffff, /* src_mask */ |
| 543 | 0x1fffff, /* dst_mask */ |
| 544 | true), /* pcrel_offset */ |
| 545 | |
| 546 | /* A hint for a jump to a register. */ |
| 547 | HOWTO (R_ALPHA_HINT, /* type */ |
| 548 | 2, /* rightshift */ |
| 549 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 550 | 14, /* bitsize */ |
| 551 | true, /* pc_relative */ |
| 552 | 0, /* bitpos */ |
| 553 | complain_overflow_dont, /* complain_on_overflow */ |
| 554 | 0, /* special_function */ |
| 555 | "HINT", /* name */ |
| 556 | false, /* partial_inplace */ |
| 557 | 0x3fff, /* src_mask */ |
| 558 | 0x3fff, /* dst_mask */ |
| 559 | true), /* pcrel_offset */ |
| 560 | |
| 561 | /* 16 bit PC relative offset. */ |
| 562 | HOWTO (R_ALPHA_SREL16, /* type */ |
| 563 | 0, /* rightshift */ |
| 564 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 565 | 16, /* bitsize */ |
| 566 | true, /* pc_relative */ |
| 567 | 0, /* bitpos */ |
| 568 | complain_overflow_signed, /* complain_on_overflow */ |
| 569 | 0, /* special_function */ |
| 570 | "SREL16", /* name */ |
| 571 | false, /* partial_inplace */ |
| 572 | 0xffff, /* src_mask */ |
| 573 | 0xffff, /* dst_mask */ |
| 574 | true), /* pcrel_offset */ |
| 575 | |
| 576 | /* 32 bit PC relative offset. */ |
| 577 | HOWTO (R_ALPHA_SREL32, /* type */ |
| 578 | 0, /* rightshift */ |
| 579 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 580 | 32, /* bitsize */ |
| 581 | true, /* pc_relative */ |
| 582 | 0, /* bitpos */ |
| 583 | complain_overflow_signed, /* complain_on_overflow */ |
| 584 | 0, /* special_function */ |
| 585 | "SREL32", /* name */ |
| 586 | false, /* partial_inplace */ |
| 587 | 0xffffffff, /* src_mask */ |
| 588 | 0xffffffff, /* dst_mask */ |
| 589 | true), /* pcrel_offset */ |
| 590 | |
| 591 | /* A 64 bit PC relative offset. */ |
| 592 | HOWTO (R_ALPHA_SREL64, /* type */ |
| 593 | 0, /* rightshift */ |
| 594 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 595 | 64, /* bitsize */ |
| 596 | true, /* pc_relative */ |
| 597 | 0, /* bitpos */ |
| 598 | complain_overflow_signed, /* complain_on_overflow */ |
| 599 | 0, /* special_function */ |
| 600 | "SREL64", /* name */ |
| 601 | false, /* partial_inplace */ |
| 602 | MINUS_ONE, /* src_mask */ |
| 603 | MINUS_ONE, /* dst_mask */ |
| 604 | true), /* pcrel_offset */ |
| 605 | |
| 606 | /* Push a value on the reloc evaluation stack. */ |
| 607 | /* Not implemented -- it's dumb. */ |
| 608 | HOWTO (R_ALPHA_OP_PUSH, /* type */ |
| 609 | 0, /* rightshift */ |
| 610 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 611 | 0, /* bitsize */ |
| 612 | false, /* pc_relative */ |
| 613 | 0, /* bitpos */ |
| 614 | complain_overflow_dont, /* complain_on_overflow */ |
| 615 | elf64_alpha_reloc_bad, /* special_function */ |
| 616 | "OP_PUSH", /* name */ |
| 617 | false, /* partial_inplace */ |
| 618 | 0, /* src_mask */ |
| 619 | 0, /* dst_mask */ |
| 620 | false), /* pcrel_offset */ |
| 621 | |
| 622 | /* Store the value from the stack at the given address. Store it in |
| 623 | a bitfield of size r_size starting at bit position r_offset. */ |
| 624 | /* Not implemented -- it's dumb. */ |
| 625 | HOWTO (R_ALPHA_OP_STORE, /* type */ |
| 626 | 0, /* rightshift */ |
| 627 | 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 628 | 64, /* bitsize */ |
| 629 | false, /* pc_relative */ |
| 630 | 0, /* bitpos */ |
| 631 | complain_overflow_dont, /* complain_on_overflow */ |
| 632 | elf64_alpha_reloc_bad, /* special_function */ |
| 633 | "OP_STORE", /* name */ |
| 634 | false, /* partial_inplace */ |
| 635 | 0, /* src_mask */ |
| 636 | MINUS_ONE, /* dst_mask */ |
| 637 | false), /* pcrel_offset */ |
| 638 | |
| 639 | /* Subtract the reloc address from the value on the top of the |
| 640 | relocation stack. */ |
| 641 | /* Not implemented -- it's dumb. */ |
| 642 | HOWTO (R_ALPHA_OP_PSUB, /* type */ |
| 643 | 0, /* rightshift */ |
| 644 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 645 | 0, /* bitsize */ |
| 646 | false, /* pc_relative */ |
| 647 | 0, /* bitpos */ |
| 648 | complain_overflow_dont, /* complain_on_overflow */ |
| 649 | elf64_alpha_reloc_bad, /* special_function */ |
| 650 | "OP_PSUB", /* name */ |
| 651 | false, /* partial_inplace */ |
| 652 | 0, /* src_mask */ |
| 653 | 0, /* dst_mask */ |
| 654 | false), /* pcrel_offset */ |
| 655 | |
| 656 | /* Shift the value on the top of the relocation stack right by the |
| 657 | given value. */ |
| 658 | /* Not implemented -- it's dumb. */ |
| 659 | HOWTO (R_ALPHA_OP_PRSHIFT, /* type */ |
| 660 | 0, /* rightshift */ |
| 661 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 662 | 0, /* bitsize */ |
| 663 | false, /* pc_relative */ |
| 664 | 0, /* bitpos */ |
| 665 | complain_overflow_dont, /* complain_on_overflow */ |
| 666 | elf64_alpha_reloc_bad, /* special_function */ |
| 667 | "OP_PRSHIFT", /* name */ |
| 668 | false, /* partial_inplace */ |
| 669 | 0, /* src_mask */ |
| 670 | 0, /* dst_mask */ |
| 671 | false), /* pcrel_offset */ |
| 672 | |
| 673 | /* Change the value of GP used by +r_addend until the next GPVALUE or the |
| 674 | end of the input bfd. */ |
| 675 | /* Not implemented -- it's dumb. */ |
| 676 | HOWTO (R_ALPHA_GPVALUE, |
| 677 | 0, /* rightshift */ |
| 678 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 679 | 0, /* bitsize */ |
| 680 | false, /* pc_relative */ |
| 681 | 0, /* bitpos */ |
| 682 | complain_overflow_dont, /* complain_on_overflow */ |
| 683 | elf64_alpha_reloc_bad, /* special_function */ |
| 684 | "GPVALUE", /* name */ |
| 685 | false, /* partial_inplace */ |
| 686 | 0, /* src_mask */ |
| 687 | 0, /* dst_mask */ |
| 688 | false), /* pcrel_offset */ |
| 689 | |
| 690 | /* The high 16 bits of the displacement from GP to the target. */ |
| 691 | HOWTO (R_ALPHA_GPRELHIGH, |
| 692 | 0, /* rightshift */ |
| 693 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 694 | 16, /* bitsize */ |
| 695 | false, /* pc_relative */ |
| 696 | 0, /* bitpos */ |
| 697 | complain_overflow_signed, /* complain_on_overflow */ |
| 698 | elf64_alpha_reloc_bad, /* special_function */ |
| 699 | "GPRELHIGH", /* name */ |
| 700 | false, /* partial_inplace */ |
| 701 | 0xffff, /* src_mask */ |
| 702 | 0xffff, /* dst_mask */ |
| 703 | false), /* pcrel_offset */ |
| 704 | |
| 705 | /* The low 16 bits of the displacement from GP to the target. */ |
| 706 | HOWTO (R_ALPHA_GPRELLOW, |
| 707 | 0, /* rightshift */ |
| 708 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 709 | 16, /* bitsize */ |
| 710 | false, /* pc_relative */ |
| 711 | 0, /* bitpos */ |
| 712 | complain_overflow_dont, /* complain_on_overflow */ |
| 713 | elf64_alpha_reloc_bad, /* special_function */ |
| 714 | "GPRELLOW", /* name */ |
| 715 | false, /* partial_inplace */ |
| 716 | 0xffff, /* src_mask */ |
| 717 | 0xffff, /* dst_mask */ |
| 718 | false), /* pcrel_offset */ |
| 719 | |
| 720 | /* A 16-bit displacement from the GP to the target. */ |
| 721 | /* XXX: Not implemented. */ |
| 722 | HOWTO (R_ALPHA_IMMED_GP_16, |
| 723 | 0, /* rightshift */ |
| 724 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 725 | 16, /* bitsize */ |
| 726 | false, /* pc_relative */ |
| 727 | 0, /* bitpos */ |
| 728 | complain_overflow_signed, /* complain_on_overflow */ |
| 729 | 0, /* special_function */ |
| 730 | "IMMED_GP_16", /* name */ |
| 731 | false, /* partial_inplace */ |
| 732 | 0xffff, /* src_mask */ |
| 733 | 0xffff, /* dst_mask */ |
| 734 | false), /* pcrel_offset */ |
| 735 | |
| 736 | /* The high bits of a 32-bit displacement from the GP to the target; the |
| 737 | low bits are supplied in the subsequent R_ALPHA_IMMED_LO32 relocs. */ |
| 738 | /* XXX: Not implemented. */ |
| 739 | HOWTO (R_ALPHA_IMMED_GP_HI32, |
| 740 | 0, /* rightshift */ |
| 741 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 742 | 0, /* bitsize */ |
| 743 | false, /* pc_relative */ |
| 744 | 0, /* bitpos */ |
| 745 | complain_overflow_dont, /* complain_on_overflow */ |
| 746 | elf64_alpha_reloc_bad, /* special_function */ |
| 747 | "IMMED_GP_HI32", /* name */ |
| 748 | false, /* partial_inplace */ |
| 749 | 0, /* src_mask */ |
| 750 | 0, /* dst_mask */ |
| 751 | false), /* pcrel_offset */ |
| 752 | |
| 753 | /* The high bits of a 32-bit displacement to the starting address of the |
| 754 | current section (the relocation target is ignored); the low bits are |
| 755 | supplied in the subsequent R_ALPHA_IMMED_LO32 relocs. */ |
| 756 | /* XXX: Not implemented. */ |
| 757 | HOWTO (R_ALPHA_IMMED_SCN_HI32, |
| 758 | 0, /* rightshift */ |
| 759 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 760 | 0, /* bitsize */ |
| 761 | false, /* pc_relative */ |
| 762 | 0, /* bitpos */ |
| 763 | complain_overflow_dont, /* complain_on_overflow */ |
| 764 | elf64_alpha_reloc_bad, /* special_function */ |
| 765 | "IMMED_SCN_HI32", /* name */ |
| 766 | false, /* partial_inplace */ |
| 767 | 0, /* src_mask */ |
| 768 | 0, /* dst_mask */ |
| 769 | false), /* pcrel_offset */ |
| 770 | |
| 771 | /* The high bits of a 32-bit displacement from the previous br, bsr, jsr |
| 772 | or jmp insn (as tagged by a BRADDR or HINT reloc) to the target; the |
| 773 | low bits are supplied by subsequent R_ALPHA_IMMED_LO32 relocs. */ |
| 774 | /* XXX: Not implemented. */ |
| 775 | HOWTO (R_ALPHA_IMMED_BR_HI32, |
| 776 | 0, /* rightshift */ |
| 777 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 778 | 0, /* bitsize */ |
| 779 | false, /* pc_relative */ |
| 780 | 0, /* bitpos */ |
| 781 | complain_overflow_dont, /* complain_on_overflow */ |
| 782 | elf64_alpha_reloc_bad, /* special_function */ |
| 783 | "IMMED_BR_HI32", /* name */ |
| 784 | false, /* partial_inplace */ |
| 785 | 0, /* src_mask */ |
| 786 | 0, /* dst_mask */ |
| 787 | false), /* pcrel_offset */ |
| 788 | |
| 789 | /* The low 16 bits of a displacement calculated in a previous HI32 reloc. */ |
| 790 | /* XXX: Not implemented. */ |
| 791 | HOWTO (R_ALPHA_IMMED_LO32, |
| 792 | 0, /* rightshift */ |
| 793 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 794 | 0, /* bitsize */ |
| 795 | false, /* pc_relative */ |
| 796 | 0, /* bitpos */ |
| 797 | complain_overflow_dont, /* complain_on_overflow */ |
| 798 | elf64_alpha_reloc_bad, /* special_function */ |
| 799 | "IMMED_LO32", /* name */ |
| 800 | false, /* partial_inplace */ |
| 801 | 0, /* src_mask */ |
| 802 | 0, /* dst_mask */ |
| 803 | false), /* pcrel_offset */ |
| 804 | |
| 805 | /* Misc ELF relocations. */ |
| 806 | |
| 807 | /* A dynamic relocation to copy the target into our .dynbss section. */ |
| 808 | /* Not generated, as all Alpha objects use PIC, so it is not needed. It |
| 809 | is present because every other ELF has one, but should not be used |
| 810 | because .dynbss is an ugly thing. */ |
| 811 | HOWTO (R_ALPHA_COPY, |
| 812 | 0, |
| 813 | 0, |
| 814 | 0, |
| 815 | false, |
| 816 | 0, |
| 817 | complain_overflow_dont, |
| 818 | bfd_elf_generic_reloc, |
| 819 | "COPY", |
| 820 | false, |
| 821 | 0, |
| 822 | 0, |
| 823 | true), |
| 824 | |
| 825 | /* A dynamic relocation for a .got entry. */ |
| 826 | HOWTO (R_ALPHA_GLOB_DAT, |
| 827 | 0, |
| 828 | 0, |
| 829 | 0, |
| 830 | false, |
| 831 | 0, |
| 832 | complain_overflow_dont, |
| 833 | bfd_elf_generic_reloc, |
| 834 | "GLOB_DAT", |
| 835 | false, |
| 836 | 0, |
| 837 | 0, |
| 838 | true), |
| 839 | |
| 840 | /* A dynamic relocation for a .plt entry. */ |
| 841 | HOWTO (R_ALPHA_JMP_SLOT, |
| 842 | 0, |
| 843 | 0, |
| 844 | 0, |
| 845 | false, |
| 846 | 0, |
| 847 | complain_overflow_dont, |
| 848 | bfd_elf_generic_reloc, |
| 849 | "JMP_SLOT", |
| 850 | false, |
| 851 | 0, |
| 852 | 0, |
| 853 | true), |
| 854 | |
| 855 | /* A dynamic relocation to add the base of the DSO to a 64-bit field. */ |
| 856 | HOWTO (R_ALPHA_RELATIVE, |
| 857 | 0, |
| 858 | 0, |
| 859 | 0, |
| 860 | false, |
| 861 | 0, |
| 862 | complain_overflow_dont, |
| 863 | bfd_elf_generic_reloc, |
| 864 | "RELATIVE", |
| 865 | false, |
| 866 | 0, |
| 867 | 0, |
| 868 | true) |
| 869 | }; |
| 870 | |
| 871 | /* A relocation function which doesn't do anything. */ |
| 872 | |
| 873 | static bfd_reloc_status_type |
| 874 | elf64_alpha_reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message) |
| 875 | bfd *abfd ATTRIBUTE_UNUSED; |
| 876 | arelent *reloc; |
| 877 | asymbol *sym ATTRIBUTE_UNUSED; |
| 878 | PTR data ATTRIBUTE_UNUSED; |
| 879 | asection *sec; |
| 880 | bfd *output_bfd; |
| 881 | char **error_message ATTRIBUTE_UNUSED; |
| 882 | { |
| 883 | if (output_bfd) |
| 884 | reloc->address += sec->output_offset; |
| 885 | return bfd_reloc_ok; |
| 886 | } |
| 887 | |
| 888 | /* A relocation function used for an unsupported reloc. */ |
| 889 | |
| 890 | static bfd_reloc_status_type |
| 891 | elf64_alpha_reloc_bad (abfd, reloc, sym, data, sec, output_bfd, error_message) |
| 892 | bfd *abfd ATTRIBUTE_UNUSED; |
| 893 | arelent *reloc; |
| 894 | asymbol *sym ATTRIBUTE_UNUSED; |
| 895 | PTR data ATTRIBUTE_UNUSED; |
| 896 | asection *sec; |
| 897 | bfd *output_bfd; |
| 898 | char **error_message ATTRIBUTE_UNUSED; |
| 899 | { |
| 900 | if (output_bfd) |
| 901 | reloc->address += sec->output_offset; |
| 902 | return bfd_reloc_notsupported; |
| 903 | } |
| 904 | |
| 905 | /* Do the work of the GPDISP relocation. */ |
| 906 | |
| 907 | static bfd_reloc_status_type |
| 908 | elf64_alpha_do_reloc_gpdisp (abfd, gpdisp, p_ldah, p_lda) |
| 909 | bfd *abfd; |
| 910 | bfd_vma gpdisp; |
| 911 | bfd_byte *p_ldah; |
| 912 | bfd_byte *p_lda; |
| 913 | { |
| 914 | bfd_reloc_status_type ret = bfd_reloc_ok; |
| 915 | bfd_vma addend; |
| 916 | unsigned long i_ldah, i_lda; |
| 917 | |
| 918 | i_ldah = bfd_get_32 (abfd, p_ldah); |
| 919 | i_lda = bfd_get_32 (abfd, p_lda); |
| 920 | |
| 921 | /* Complain if the instructions are not correct. */ |
| 922 | if (((i_ldah >> 26) & 0x3f) != 0x09 |
| 923 | || ((i_lda >> 26) & 0x3f) != 0x08) |
| 924 | ret = bfd_reloc_dangerous; |
| 925 | |
| 926 | /* Extract the user-supplied offset, mirroring the sign extensions |
| 927 | that the instructions perform. */ |
| 928 | addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff); |
| 929 | addend = (addend ^ 0x80008000) - 0x80008000; |
| 930 | |
| 931 | gpdisp += addend; |
| 932 | |
| 933 | if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000 |
| 934 | || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000) |
| 935 | ret = bfd_reloc_overflow; |
| 936 | |
| 937 | /* compensate for the sign extension again. */ |
| 938 | i_ldah = ((i_ldah & 0xffff0000) |
| 939 | | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff)); |
| 940 | i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff); |
| 941 | |
| 942 | bfd_put_32 (abfd, i_ldah, p_ldah); |
| 943 | bfd_put_32 (abfd, i_lda, p_lda); |
| 944 | |
| 945 | return ret; |
| 946 | } |
| 947 | |
| 948 | /* The special function for the GPDISP reloc. */ |
| 949 | |
| 950 | static bfd_reloc_status_type |
| 951 | elf64_alpha_reloc_gpdisp (abfd, reloc_entry, sym, data, input_section, |
| 952 | output_bfd, err_msg) |
| 953 | bfd *abfd; |
| 954 | arelent *reloc_entry; |
| 955 | asymbol *sym ATTRIBUTE_UNUSED; |
| 956 | PTR data; |
| 957 | asection *input_section; |
| 958 | bfd *output_bfd; |
| 959 | char **err_msg; |
| 960 | { |
| 961 | bfd_reloc_status_type ret; |
| 962 | bfd_vma gp, relocation; |
| 963 | bfd_byte *p_ldah, *p_lda; |
| 964 | |
| 965 | /* Don't do anything if we're not doing a final link. */ |
| 966 | if (output_bfd) |
| 967 | { |
| 968 | reloc_entry->address += input_section->output_offset; |
| 969 | return bfd_reloc_ok; |
| 970 | } |
| 971 | |
| 972 | if (reloc_entry->address > input_section->_cooked_size || |
| 973 | reloc_entry->address + reloc_entry->addend > input_section->_cooked_size) |
| 974 | return bfd_reloc_outofrange; |
| 975 | |
| 976 | /* The gp used in the portion of the output object to which this |
| 977 | input object belongs is cached on the input bfd. */ |
| 978 | gp = _bfd_get_gp_value (abfd); |
| 979 | |
| 980 | relocation = (input_section->output_section->vma |
| 981 | + input_section->output_offset |
| 982 | + reloc_entry->address); |
| 983 | |
| 984 | p_ldah = (bfd_byte *) data + reloc_entry->address; |
| 985 | p_lda = p_ldah + reloc_entry->addend; |
| 986 | |
| 987 | ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda); |
| 988 | |
| 989 | /* Complain if the instructions are not correct. */ |
| 990 | if (ret == bfd_reloc_dangerous) |
| 991 | *err_msg = _("GPDISP relocation did not find ldah and lda instructions"); |
| 992 | |
| 993 | return ret; |
| 994 | } |
| 995 | |
| 996 | /* A mapping from BFD reloc types to Alpha ELF reloc types. */ |
| 997 | |
| 998 | struct elf_reloc_map |
| 999 | { |
| 1000 | bfd_reloc_code_real_type bfd_reloc_val; |
| 1001 | int elf_reloc_val; |
| 1002 | }; |
| 1003 | |
| 1004 | static const struct elf_reloc_map elf64_alpha_reloc_map[] = |
| 1005 | { |
| 1006 | {BFD_RELOC_NONE, R_ALPHA_NONE}, |
| 1007 | {BFD_RELOC_32, R_ALPHA_REFLONG}, |
| 1008 | {BFD_RELOC_64, R_ALPHA_REFQUAD}, |
| 1009 | {BFD_RELOC_CTOR, R_ALPHA_REFQUAD}, |
| 1010 | {BFD_RELOC_GPREL32, R_ALPHA_GPREL32}, |
| 1011 | {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL}, |
| 1012 | {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE}, |
| 1013 | {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP}, |
| 1014 | {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR}, |
| 1015 | {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT}, |
| 1016 | {BFD_RELOC_16_PCREL, R_ALPHA_SREL16}, |
| 1017 | {BFD_RELOC_32_PCREL, R_ALPHA_SREL32}, |
| 1018 | {BFD_RELOC_64_PCREL, R_ALPHA_SREL64}, |
| 1019 | |
| 1020 | /* The BFD_RELOC_ALPHA_USER_* relocations are used by the assembler to process |
| 1021 | the explicit !<reloc>!sequence relocations, and are mapped into the normal |
| 1022 | relocations at the end of processing. */ |
| 1023 | {BFD_RELOC_ALPHA_USER_LITERAL, R_ALPHA_LITERAL}, |
| 1024 | {BFD_RELOC_ALPHA_USER_LITUSE_BASE, R_ALPHA_LITUSE}, |
| 1025 | {BFD_RELOC_ALPHA_USER_LITUSE_BYTOFF, R_ALPHA_LITUSE}, |
| 1026 | {BFD_RELOC_ALPHA_USER_LITUSE_JSR, R_ALPHA_LITUSE}, |
| 1027 | {BFD_RELOC_ALPHA_USER_GPDISP, R_ALPHA_GPDISP}, |
| 1028 | {BFD_RELOC_ALPHA_USER_GPRELHIGH, R_ALPHA_GPRELHIGH}, |
| 1029 | {BFD_RELOC_ALPHA_USER_GPRELLOW, R_ALPHA_GPRELLOW}, |
| 1030 | }; |
| 1031 | |
| 1032 | /* Given a BFD reloc type, return a HOWTO structure. */ |
| 1033 | |
| 1034 | static reloc_howto_type * |
| 1035 | elf64_alpha_bfd_reloc_type_lookup (abfd, code) |
| 1036 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1037 | bfd_reloc_code_real_type code; |
| 1038 | { |
| 1039 | const struct elf_reloc_map *i, *e; |
| 1040 | i = e = elf64_alpha_reloc_map; |
| 1041 | e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map); |
| 1042 | for (; i != e; ++i) |
| 1043 | { |
| 1044 | if (i->bfd_reloc_val == code) |
| 1045 | return &elf64_alpha_howto_table[i->elf_reloc_val]; |
| 1046 | } |
| 1047 | return 0; |
| 1048 | } |
| 1049 | |
| 1050 | /* Given an Alpha ELF reloc type, fill in an arelent structure. */ |
| 1051 | |
| 1052 | static void |
| 1053 | elf64_alpha_info_to_howto (abfd, cache_ptr, dst) |
| 1054 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1055 | arelent *cache_ptr; |
| 1056 | Elf64_Internal_Rela *dst; |
| 1057 | { |
| 1058 | unsigned r_type; |
| 1059 | |
| 1060 | r_type = ELF64_R_TYPE(dst->r_info); |
| 1061 | BFD_ASSERT (r_type < (unsigned int) R_ALPHA_max); |
| 1062 | cache_ptr->howto = &elf64_alpha_howto_table[r_type]; |
| 1063 | } |
| 1064 | \f |
| 1065 | /* These functions do relaxation for Alpha ELF. |
| 1066 | |
| 1067 | Currently I'm only handling what I can do with existing compiler |
| 1068 | and assembler support, which means no instructions are removed, |
| 1069 | though some may be nopped. At this time GCC does not emit enough |
| 1070 | information to do all of the relaxing that is possible. It will |
| 1071 | take some not small amount of work for that to happen. |
| 1072 | |
| 1073 | There are a couple of interesting papers that I once read on this |
| 1074 | subject, that I cannot find references to at the moment, that |
| 1075 | related to Alpha in particular. They are by David Wall, then of |
| 1076 | DEC WRL. */ |
| 1077 | |
| 1078 | #define OP_LDA 0x08 |
| 1079 | #define OP_LDAH 0x09 |
| 1080 | #define INSN_JSR 0x68004000 |
| 1081 | #define INSN_JSR_MASK 0xfc00c000 |
| 1082 | #define OP_LDQ 0x29 |
| 1083 | #define OP_BR 0x30 |
| 1084 | #define OP_BSR 0x34 |
| 1085 | #define INSN_UNOP 0x2fe00000 |
| 1086 | |
| 1087 | struct alpha_relax_info |
| 1088 | { |
| 1089 | bfd *abfd; |
| 1090 | asection *sec; |
| 1091 | bfd_byte *contents; |
| 1092 | Elf_Internal_Rela *relocs, *relend; |
| 1093 | struct bfd_link_info *link_info; |
| 1094 | boolean changed_contents; |
| 1095 | boolean changed_relocs; |
| 1096 | bfd_vma gp; |
| 1097 | bfd *gotobj; |
| 1098 | asection *tsec; |
| 1099 | struct alpha_elf_link_hash_entry *h; |
| 1100 | struct alpha_elf_got_entry *gotent; |
| 1101 | unsigned char other; |
| 1102 | }; |
| 1103 | |
| 1104 | static Elf_Internal_Rela * elf64_alpha_relax_with_lituse |
| 1105 | PARAMS((struct alpha_relax_info *info, bfd_vma symval, |
| 1106 | Elf_Internal_Rela *irel, Elf_Internal_Rela *irelend)); |
| 1107 | |
| 1108 | static boolean elf64_alpha_relax_without_lituse |
| 1109 | PARAMS((struct alpha_relax_info *info, bfd_vma symval, |
| 1110 | Elf_Internal_Rela *irel)); |
| 1111 | |
| 1112 | static bfd_vma elf64_alpha_relax_opt_call |
| 1113 | PARAMS((struct alpha_relax_info *info, bfd_vma symval)); |
| 1114 | |
| 1115 | static boolean elf64_alpha_relax_section |
| 1116 | PARAMS((bfd *abfd, asection *sec, struct bfd_link_info *link_info, |
| 1117 | boolean *again)); |
| 1118 | |
| 1119 | static Elf_Internal_Rela * |
| 1120 | elf64_alpha_find_reloc_at_ofs (rel, relend, offset, type) |
| 1121 | Elf_Internal_Rela *rel, *relend; |
| 1122 | bfd_vma offset; |
| 1123 | int type; |
| 1124 | { |
| 1125 | while (rel < relend) |
| 1126 | { |
| 1127 | if (rel->r_offset == offset |
| 1128 | && ELF64_R_TYPE (rel->r_info) == (unsigned int) type) |
| 1129 | return rel; |
| 1130 | ++rel; |
| 1131 | } |
| 1132 | return NULL; |
| 1133 | } |
| 1134 | |
| 1135 | static Elf_Internal_Rela * |
| 1136 | elf64_alpha_relax_with_lituse (info, symval, irel, irelend) |
| 1137 | struct alpha_relax_info *info; |
| 1138 | bfd_vma symval; |
| 1139 | Elf_Internal_Rela *irel, *irelend; |
| 1140 | { |
| 1141 | Elf_Internal_Rela *urel; |
| 1142 | int flags, count, i; |
| 1143 | bfd_signed_vma disp; |
| 1144 | boolean fits16; |
| 1145 | boolean fits32; |
| 1146 | boolean lit_reused = false; |
| 1147 | boolean all_optimized = true; |
| 1148 | unsigned int lit_insn; |
| 1149 | |
| 1150 | lit_insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset); |
| 1151 | if (lit_insn >> 26 != OP_LDQ) |
| 1152 | { |
| 1153 | ((*_bfd_error_handler) |
| 1154 | ("%s: %s+0x%lx: warning: LITERAL relocation against unexpected insn", |
| 1155 | bfd_get_filename (info->abfd), info->sec->name, |
| 1156 | (unsigned long)irel->r_offset)); |
| 1157 | return irel; |
| 1158 | } |
| 1159 | |
| 1160 | /* Summarize how this particular LITERAL is used. */ |
| 1161 | for (urel = irel+1, flags = count = 0; urel < irelend; ++urel, ++count) |
| 1162 | { |
| 1163 | if (ELF64_R_TYPE (urel->r_info) != R_ALPHA_LITUSE) |
| 1164 | break; |
| 1165 | if (urel->r_addend >= 0 && urel->r_addend <= 3) |
| 1166 | flags |= 1 << urel->r_addend; |
| 1167 | } |
| 1168 | |
| 1169 | /* A little preparation for the loop... */ |
| 1170 | disp = symval - info->gp; |
| 1171 | |
| 1172 | for (urel = irel+1, i = 0; i < count; ++i, ++urel) |
| 1173 | { |
| 1174 | unsigned int insn; |
| 1175 | int insn_disp; |
| 1176 | bfd_signed_vma xdisp; |
| 1177 | |
| 1178 | insn = bfd_get_32 (info->abfd, info->contents + urel->r_offset); |
| 1179 | |
| 1180 | switch (urel->r_addend) |
| 1181 | { |
| 1182 | default: /* 0 = ADDRESS FORMAT */ |
| 1183 | /* This type is really just a placeholder to note that all |
| 1184 | uses cannot be optimized, but to still allow some. */ |
| 1185 | all_optimized = false; |
| 1186 | break; |
| 1187 | |
| 1188 | case 1: /* MEM FORMAT */ |
| 1189 | /* We can always optimize 16-bit displacements. */ |
| 1190 | |
| 1191 | /* Extract the displacement from the instruction, sign-extending |
| 1192 | it if necessary, then test whether it is within 16 or 32 bits |
| 1193 | displacement from GP. */ |
| 1194 | insn_disp = insn & 0x0000ffff; |
| 1195 | if (insn_disp & 0x00008000) |
| 1196 | insn_disp |= 0xffff0000; /* Negative: sign-extend. */ |
| 1197 | |
| 1198 | xdisp = disp + insn_disp; |
| 1199 | fits16 = (xdisp >= - (bfd_signed_vma) 0x00008000 && xdisp < 0x00008000); |
| 1200 | fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000 && xdisp < 0x7fff8000); |
| 1201 | |
| 1202 | if (fits16) |
| 1203 | { |
| 1204 | /* Take the op code and dest from this insn, take the base |
| 1205 | register from the literal insn. Leave the offset alone. */ |
| 1206 | insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000); |
| 1207 | urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), |
| 1208 | R_ALPHA_GPRELLOW); |
| 1209 | urel->r_addend = irel->r_addend; |
| 1210 | info->changed_relocs = true; |
| 1211 | |
| 1212 | bfd_put_32 (info->abfd, insn, info->contents + urel->r_offset); |
| 1213 | info->changed_contents = true; |
| 1214 | } |
| 1215 | |
| 1216 | /* If all mem+byte, we can optimize 32-bit mem displacements. */ |
| 1217 | else if (fits32 && !(flags & ~6)) |
| 1218 | { |
| 1219 | /* FIXME: sanity check that lit insn Ra is mem insn Rb. */ |
| 1220 | |
| 1221 | irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), |
| 1222 | R_ALPHA_GPRELHIGH); |
| 1223 | lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000); |
| 1224 | bfd_put_32 (info->abfd, lit_insn, |
| 1225 | info->contents + irel->r_offset); |
| 1226 | lit_reused = true; |
| 1227 | info->changed_contents = true; |
| 1228 | |
| 1229 | urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), |
| 1230 | R_ALPHA_GPRELLOW); |
| 1231 | urel->r_addend = irel->r_addend; |
| 1232 | info->changed_relocs = true; |
| 1233 | } |
| 1234 | else |
| 1235 | all_optimized = false; |
| 1236 | break; |
| 1237 | |
| 1238 | case 2: /* BYTE OFFSET FORMAT */ |
| 1239 | /* We can always optimize byte instructions. */ |
| 1240 | |
| 1241 | /* FIXME: sanity check the insn for byte op. Check that the |
| 1242 | literal dest reg is indeed Rb in the byte insn. */ |
| 1243 | |
| 1244 | insn = (insn & ~0x001ff000) | ((symval & 7) << 13) | 0x1000; |
| 1245 | |
| 1246 | urel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
| 1247 | urel->r_addend = 0; |
| 1248 | info->changed_relocs = true; |
| 1249 | |
| 1250 | bfd_put_32 (info->abfd, insn, info->contents + urel->r_offset); |
| 1251 | info->changed_contents = true; |
| 1252 | break; |
| 1253 | |
| 1254 | case 3: /* CALL FORMAT */ |
| 1255 | { |
| 1256 | /* If not zero, place to jump without needing pv. */ |
| 1257 | bfd_vma optdest = elf64_alpha_relax_opt_call (info, symval); |
| 1258 | bfd_vma org = (info->sec->output_section->vma |
| 1259 | + info->sec->output_offset |
| 1260 | + urel->r_offset + 4); |
| 1261 | bfd_signed_vma odisp; |
| 1262 | |
| 1263 | odisp = (optdest ? optdest : symval) - org; |
| 1264 | if (odisp >= -0x400000 && odisp < 0x400000) |
| 1265 | { |
| 1266 | Elf_Internal_Rela *xrel; |
| 1267 | |
| 1268 | /* Preserve branch prediction call stack when possible. */ |
| 1269 | if ((insn & INSN_JSR_MASK) == INSN_JSR) |
| 1270 | insn = (OP_BSR << 26) | (insn & 0x03e00000); |
| 1271 | else |
| 1272 | insn = (OP_BR << 26) | (insn & 0x03e00000); |
| 1273 | |
| 1274 | urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), |
| 1275 | R_ALPHA_BRADDR); |
| 1276 | urel->r_addend = irel->r_addend; |
| 1277 | |
| 1278 | if (optdest) |
| 1279 | urel->r_addend += optdest - symval; |
| 1280 | else |
| 1281 | all_optimized = false; |
| 1282 | |
| 1283 | bfd_put_32 (info->abfd, insn, info->contents + urel->r_offset); |
| 1284 | |
| 1285 | /* Kill any HINT reloc that might exist for this insn. */ |
| 1286 | xrel = (elf64_alpha_find_reloc_at_ofs |
| 1287 | (info->relocs, info->relend, urel->r_offset, |
| 1288 | R_ALPHA_HINT)); |
| 1289 | if (xrel) |
| 1290 | xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
| 1291 | |
| 1292 | info->changed_contents = true; |
| 1293 | info->changed_relocs = true; |
| 1294 | } |
| 1295 | else |
| 1296 | all_optimized = false; |
| 1297 | |
| 1298 | /* ??? If target gp == current gp we can eliminate the gp reload. |
| 1299 | This does depend on every place a gp could be reloaded will |
| 1300 | be, which currently happens for all code produced by gcc, but |
| 1301 | not necessarily by hand-coded assembly, or if sibling calls |
| 1302 | are enabled in gcc. |
| 1303 | |
| 1304 | Perhaps conditionalize this on a flag being set in the target |
| 1305 | object file's header, and have gcc set it? */ |
| 1306 | } |
| 1307 | break; |
| 1308 | } |
| 1309 | } |
| 1310 | |
| 1311 | /* If all cases were optimized, we can reduce the use count on this |
| 1312 | got entry by one, possibly eliminating it. */ |
| 1313 | if (all_optimized) |
| 1314 | { |
| 1315 | info->gotent->use_count -= 1; |
| 1316 | alpha_elf_tdata (info->gotent->gotobj)->total_got_entries -= 1; |
| 1317 | if (!info->h) |
| 1318 | alpha_elf_tdata (info->gotent->gotobj)->n_local_got_entries -= 1; |
| 1319 | |
| 1320 | /* If the literal instruction is no longer needed (it may have been |
| 1321 | reused. We can eliminate it. |
| 1322 | ??? For now, I don't want to deal with compacting the section, |
| 1323 | so just nop it out. */ |
| 1324 | if (!lit_reused) |
| 1325 | { |
| 1326 | irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); |
| 1327 | info->changed_relocs = true; |
| 1328 | |
| 1329 | bfd_put_32 (info->abfd, INSN_UNOP, info->contents + irel->r_offset); |
| 1330 | info->changed_contents = true; |
| 1331 | } |
| 1332 | } |
| 1333 | |
| 1334 | return irel + count; |
| 1335 | } |
| 1336 | |
| 1337 | static bfd_vma |
| 1338 | elf64_alpha_relax_opt_call (info, symval) |
| 1339 | struct alpha_relax_info *info; |
| 1340 | bfd_vma symval; |
| 1341 | { |
| 1342 | /* If the function has the same gp, and we can identify that the |
| 1343 | function does not use its function pointer, we can eliminate the |
| 1344 | address load. */ |
| 1345 | |
| 1346 | /* If the symbol is marked NOPV, we are being told the function never |
| 1347 | needs its procedure value. */ |
| 1348 | if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV) |
| 1349 | return symval; |
| 1350 | |
| 1351 | /* If the symbol is marked STD_GP, we are being told the function does |
| 1352 | a normal ldgp in the first two words. */ |
| 1353 | else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD) |
| 1354 | ; |
| 1355 | |
| 1356 | /* Otherwise, we may be able to identify a GP load in the first two |
| 1357 | words, which we can then skip. */ |
| 1358 | else |
| 1359 | { |
| 1360 | Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp; |
| 1361 | bfd_vma ofs; |
| 1362 | |
| 1363 | /* Load the relocations from the section that the target symbol is in. */ |
| 1364 | if (info->sec == info->tsec) |
| 1365 | { |
| 1366 | tsec_relocs = info->relocs; |
| 1367 | tsec_relend = info->relend; |
| 1368 | tsec_free = NULL; |
| 1369 | } |
| 1370 | else |
| 1371 | { |
| 1372 | tsec_relocs = (_bfd_elf64_link_read_relocs |
| 1373 | (info->abfd, info->tsec, (PTR) NULL, |
| 1374 | (Elf_Internal_Rela *) NULL, |
| 1375 | info->link_info->keep_memory)); |
| 1376 | if (tsec_relocs == NULL) |
| 1377 | return 0; |
| 1378 | tsec_relend = tsec_relocs + info->tsec->reloc_count; |
| 1379 | tsec_free = (info->link_info->keep_memory ? NULL : tsec_relocs); |
| 1380 | } |
| 1381 | |
| 1382 | /* Recover the symbol's offset within the section. */ |
| 1383 | ofs = (symval - info->tsec->output_section->vma |
| 1384 | - info->tsec->output_offset); |
| 1385 | |
| 1386 | /* Look for a GPDISP reloc. */ |
| 1387 | gpdisp = (elf64_alpha_find_reloc_at_ofs |
| 1388 | (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP)); |
| 1389 | |
| 1390 | if (!gpdisp || gpdisp->r_addend != 4) |
| 1391 | { |
| 1392 | if (tsec_free) |
| 1393 | free (tsec_free); |
| 1394 | return 0; |
| 1395 | } |
| 1396 | if (tsec_free) |
| 1397 | free (tsec_free); |
| 1398 | } |
| 1399 | |
| 1400 | /* We've now determined that we can skip an initial gp load. Verify |
| 1401 | that the call and the target use the same gp. */ |
| 1402 | if (info->link_info->hash->creator != info->tsec->owner->xvec |
| 1403 | || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj) |
| 1404 | return 0; |
| 1405 | |
| 1406 | return symval + 8; |
| 1407 | } |
| 1408 | |
| 1409 | static boolean |
| 1410 | elf64_alpha_relax_without_lituse (info, symval, irel) |
| 1411 | struct alpha_relax_info *info; |
| 1412 | bfd_vma symval; |
| 1413 | Elf_Internal_Rela *irel; |
| 1414 | { |
| 1415 | unsigned int insn; |
| 1416 | bfd_signed_vma disp; |
| 1417 | |
| 1418 | /* Get the instruction. */ |
| 1419 | insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset); |
| 1420 | |
| 1421 | if (insn >> 26 != OP_LDQ) |
| 1422 | { |
| 1423 | ((*_bfd_error_handler) |
| 1424 | ("%s: %s+0x%lx: warning: LITERAL relocation against unexpected insn", |
| 1425 | bfd_get_filename (info->abfd), info->sec->name, |
| 1426 | (unsigned long) irel->r_offset)); |
| 1427 | return true; |
| 1428 | } |
| 1429 | |
| 1430 | /* So we aren't told much. Do what we can with the address load and |
| 1431 | fake the rest. All of the optimizations here require that the |
| 1432 | offset from the GP fit in 16 bits. */ |
| 1433 | |
| 1434 | disp = symval - info->gp; |
| 1435 | if (disp < -0x8000 || disp >= 0x8000) |
| 1436 | return true; |
| 1437 | |
| 1438 | /* On the LITERAL instruction itself, consider exchanging |
| 1439 | `ldq R,X(gp)' for `lda R,Y(gp)'. */ |
| 1440 | |
| 1441 | insn = (OP_LDA << 26) | (insn & 0x03ff0000); |
| 1442 | bfd_put_32 (info->abfd, insn, info->contents + irel->r_offset); |
| 1443 | info->changed_contents = true; |
| 1444 | |
| 1445 | irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), R_ALPHA_GPRELLOW); |
| 1446 | info->changed_relocs = true; |
| 1447 | |
| 1448 | /* Reduce the use count on this got entry by one, possibly |
| 1449 | eliminating it. */ |
| 1450 | info->gotent->use_count -= 1; |
| 1451 | alpha_elf_tdata (info->gotent->gotobj)->total_got_entries -= 1; |
| 1452 | if (!info->h) |
| 1453 | alpha_elf_tdata (info->gotent->gotobj)->n_local_got_entries -= 1; |
| 1454 | |
| 1455 | /* ??? Search forward through this basic block looking for insns |
| 1456 | that use the target register. Stop after an insn modifying the |
| 1457 | register is seen, or after a branch or call. |
| 1458 | |
| 1459 | Any such memory load insn may be substituted by a load directly |
| 1460 | off the GP. This allows the memory load insn to be issued before |
| 1461 | the calculated GP register would otherwise be ready. |
| 1462 | |
| 1463 | Any such jsr insn can be replaced by a bsr if it is in range. |
| 1464 | |
| 1465 | This would mean that we'd have to _add_ relocations, the pain of |
| 1466 | which gives one pause. */ |
| 1467 | |
| 1468 | return true; |
| 1469 | } |
| 1470 | |
| 1471 | static boolean |
| 1472 | elf64_alpha_relax_section (abfd, sec, link_info, again) |
| 1473 | bfd *abfd; |
| 1474 | asection *sec; |
| 1475 | struct bfd_link_info *link_info; |
| 1476 | boolean *again; |
| 1477 | { |
| 1478 | Elf_Internal_Shdr *symtab_hdr; |
| 1479 | Elf_Internal_Rela *internal_relocs; |
| 1480 | Elf_Internal_Rela *free_relocs = NULL; |
| 1481 | Elf_Internal_Rela *irel, *irelend; |
| 1482 | bfd_byte *free_contents = NULL; |
| 1483 | Elf64_External_Sym *extsyms = NULL; |
| 1484 | Elf64_External_Sym *free_extsyms = NULL; |
| 1485 | struct alpha_elf_got_entry **local_got_entries; |
| 1486 | struct alpha_relax_info info; |
| 1487 | |
| 1488 | /* We are not currently changing any sizes, so only one pass. */ |
| 1489 | *again = false; |
| 1490 | |
| 1491 | if (link_info->relocateable |
| 1492 | || (sec->flags & SEC_RELOC) == 0 |
| 1493 | || sec->reloc_count == 0) |
| 1494 | return true; |
| 1495 | |
| 1496 | /* If this is the first time we have been called for this section, |
| 1497 | initialize the cooked size. */ |
| 1498 | if (sec->_cooked_size == 0) |
| 1499 | sec->_cooked_size = sec->_raw_size; |
| 1500 | |
| 1501 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1502 | local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; |
| 1503 | |
| 1504 | /* Load the relocations for this section. */ |
| 1505 | internal_relocs = (_bfd_elf64_link_read_relocs |
| 1506 | (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
| 1507 | link_info->keep_memory)); |
| 1508 | if (internal_relocs == NULL) |
| 1509 | goto error_return; |
| 1510 | if (! link_info->keep_memory) |
| 1511 | free_relocs = internal_relocs; |
| 1512 | |
| 1513 | memset(&info, 0, sizeof (info)); |
| 1514 | info.abfd = abfd; |
| 1515 | info.sec = sec; |
| 1516 | info.link_info = link_info; |
| 1517 | info.relocs = internal_relocs; |
| 1518 | info.relend = irelend = internal_relocs + sec->reloc_count; |
| 1519 | |
| 1520 | /* Find the GP for this object. */ |
| 1521 | info.gotobj = alpha_elf_tdata (abfd)->gotobj; |
| 1522 | if (info.gotobj) |
| 1523 | { |
| 1524 | asection *sgot = alpha_elf_tdata (info.gotobj)->got; |
| 1525 | info.gp = _bfd_get_gp_value (info.gotobj); |
| 1526 | if (info.gp == 0) |
| 1527 | { |
| 1528 | info.gp = (sgot->output_section->vma |
| 1529 | + sgot->output_offset |
| 1530 | + 0x8000); |
| 1531 | _bfd_set_gp_value (info.gotobj, info.gp); |
| 1532 | } |
| 1533 | } |
| 1534 | |
| 1535 | for (irel = internal_relocs; irel < irelend; irel++) |
| 1536 | { |
| 1537 | bfd_vma symval; |
| 1538 | Elf_Internal_Sym isym; |
| 1539 | struct alpha_elf_got_entry *gotent; |
| 1540 | |
| 1541 | if (ELF64_R_TYPE (irel->r_info) != (int) R_ALPHA_LITERAL) |
| 1542 | continue; |
| 1543 | |
| 1544 | /* Get the section contents. */ |
| 1545 | if (info.contents == NULL) |
| 1546 | { |
| 1547 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 1548 | info.contents = elf_section_data (sec)->this_hdr.contents; |
| 1549 | else |
| 1550 | { |
| 1551 | info.contents = (bfd_byte *) bfd_malloc (sec->_raw_size); |
| 1552 | if (info.contents == NULL) |
| 1553 | goto error_return; |
| 1554 | free_contents = info.contents; |
| 1555 | |
| 1556 | if (! bfd_get_section_contents (abfd, sec, info.contents, |
| 1557 | (file_ptr) 0, sec->_raw_size)) |
| 1558 | goto error_return; |
| 1559 | } |
| 1560 | } |
| 1561 | |
| 1562 | /* Read this BFD's symbols if we haven't done so already. */ |
| 1563 | if (extsyms == NULL) |
| 1564 | { |
| 1565 | if (symtab_hdr->contents != NULL) |
| 1566 | extsyms = (Elf64_External_Sym *) symtab_hdr->contents; |
| 1567 | else |
| 1568 | { |
| 1569 | extsyms = ((Elf64_External_Sym *) |
| 1570 | bfd_malloc (symtab_hdr->sh_size)); |
| 1571 | if (extsyms == NULL) |
| 1572 | goto error_return; |
| 1573 | free_extsyms = extsyms; |
| 1574 | if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0 |
| 1575 | || (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd) |
| 1576 | != symtab_hdr->sh_size)) |
| 1577 | goto error_return; |
| 1578 | } |
| 1579 | } |
| 1580 | |
| 1581 | /* Get the value of the symbol referred to by the reloc. */ |
| 1582 | if (ELF64_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 1583 | { |
| 1584 | /* A local symbol. */ |
| 1585 | bfd_elf64_swap_symbol_in (abfd, |
| 1586 | extsyms + ELF64_R_SYM (irel->r_info), |
| 1587 | &isym); |
| 1588 | if (isym.st_shndx == SHN_UNDEF) |
| 1589 | info.tsec = bfd_und_section_ptr; |
| 1590 | else if (isym.st_shndx > 0 && isym.st_shndx < SHN_LORESERVE) |
| 1591 | info.tsec = bfd_section_from_elf_index (abfd, isym.st_shndx); |
| 1592 | else if (isym.st_shndx == SHN_ABS) |
| 1593 | info.tsec = bfd_abs_section_ptr; |
| 1594 | else if (isym.st_shndx == SHN_COMMON) |
| 1595 | info.tsec = bfd_com_section_ptr; |
| 1596 | else |
| 1597 | continue; /* who knows. */ |
| 1598 | |
| 1599 | info.h = NULL; |
| 1600 | info.other = isym.st_other; |
| 1601 | gotent = local_got_entries[ELF64_R_SYM(irel->r_info)]; |
| 1602 | symval = isym.st_value; |
| 1603 | } |
| 1604 | else |
| 1605 | { |
| 1606 | unsigned long indx; |
| 1607 | struct alpha_elf_link_hash_entry *h; |
| 1608 | |
| 1609 | indx = ELF64_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 1610 | h = alpha_elf_sym_hashes (abfd)[indx]; |
| 1611 | BFD_ASSERT (h != NULL); |
| 1612 | |
| 1613 | while (h->root.root.type == bfd_link_hash_indirect |
| 1614 | || h->root.root.type == bfd_link_hash_warning) |
| 1615 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; |
| 1616 | |
| 1617 | /* We can't do anthing with undefined or dynamic symbols. */ |
| 1618 | if (h->root.root.type == bfd_link_hash_undefined |
| 1619 | || h->root.root.type == bfd_link_hash_undefweak |
| 1620 | || alpha_elf_dynamic_symbol_p (&h->root, link_info)) |
| 1621 | continue; |
| 1622 | |
| 1623 | info.h = h; |
| 1624 | info.tsec = h->root.root.u.def.section; |
| 1625 | info.other = h->root.other; |
| 1626 | gotent = h->got_entries; |
| 1627 | symval = h->root.root.u.def.value; |
| 1628 | } |
| 1629 | |
| 1630 | /* Search for the got entry to be used by this relocation. */ |
| 1631 | while (gotent->gotobj != info.gotobj || gotent->addend != irel->r_addend) |
| 1632 | gotent = gotent->next; |
| 1633 | info.gotent = gotent; |
| 1634 | |
| 1635 | symval += info.tsec->output_section->vma + info.tsec->output_offset; |
| 1636 | symval += irel->r_addend; |
| 1637 | |
| 1638 | BFD_ASSERT(info.gotent != NULL); |
| 1639 | |
| 1640 | /* If there exist LITUSE relocations immediately following, this |
| 1641 | opens up all sorts of interesting optimizations, because we |
| 1642 | now know every location that this address load is used. */ |
| 1643 | |
| 1644 | if (irel+1 < irelend && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE) |
| 1645 | { |
| 1646 | irel = elf64_alpha_relax_with_lituse (&info, symval, irel, irelend); |
| 1647 | if (irel == NULL) |
| 1648 | goto error_return; |
| 1649 | } |
| 1650 | else |
| 1651 | { |
| 1652 | if (!elf64_alpha_relax_without_lituse (&info, symval, irel)) |
| 1653 | goto error_return; |
| 1654 | } |
| 1655 | } |
| 1656 | |
| 1657 | if (!elf64_alpha_size_got_sections (abfd, link_info)) |
| 1658 | return false; |
| 1659 | |
| 1660 | if (info.changed_relocs) |
| 1661 | { |
| 1662 | elf_section_data (sec)->relocs = internal_relocs; |
| 1663 | } |
| 1664 | else if (free_relocs != NULL) |
| 1665 | { |
| 1666 | free (free_relocs); |
| 1667 | } |
| 1668 | |
| 1669 | if (info.changed_contents) |
| 1670 | { |
| 1671 | elf_section_data (sec)->this_hdr.contents = info.contents; |
| 1672 | } |
| 1673 | else if (free_contents != NULL) |
| 1674 | { |
| 1675 | if (! link_info->keep_memory) |
| 1676 | free (free_contents); |
| 1677 | else |
| 1678 | { |
| 1679 | /* Cache the section contents for elf_link_input_bfd. */ |
| 1680 | elf_section_data (sec)->this_hdr.contents = info.contents; |
| 1681 | } |
| 1682 | } |
| 1683 | |
| 1684 | if (free_extsyms != NULL) |
| 1685 | { |
| 1686 | if (! link_info->keep_memory) |
| 1687 | free (free_extsyms); |
| 1688 | else |
| 1689 | { |
| 1690 | /* Cache the symbols for elf_link_input_bfd. */ |
| 1691 | symtab_hdr->contents = extsyms; |
| 1692 | } |
| 1693 | } |
| 1694 | |
| 1695 | *again = info.changed_contents || info.changed_relocs; |
| 1696 | |
| 1697 | return true; |
| 1698 | |
| 1699 | error_return: |
| 1700 | if (free_relocs != NULL) |
| 1701 | free (free_relocs); |
| 1702 | if (free_contents != NULL) |
| 1703 | free (free_contents); |
| 1704 | if (free_extsyms != NULL) |
| 1705 | free (free_extsyms); |
| 1706 | return false; |
| 1707 | } |
| 1708 | \f |
| 1709 | /* PLT/GOT Stuff */ |
| 1710 | #define PLT_HEADER_SIZE 32 |
| 1711 | #define PLT_HEADER_WORD1 0xc3600000 /* br $27,.+4 */ |
| 1712 | #define PLT_HEADER_WORD2 0xa77b000c /* ldq $27,12($27) */ |
| 1713 | #define PLT_HEADER_WORD3 0x47ff041f /* nop */ |
| 1714 | #define PLT_HEADER_WORD4 0x6b7b0000 /* jmp $27,($27) */ |
| 1715 | |
| 1716 | #define PLT_ENTRY_SIZE 12 |
| 1717 | #define PLT_ENTRY_WORD1 0xc3800000 /* br $28, plt0 */ |
| 1718 | #define PLT_ENTRY_WORD2 0 |
| 1719 | #define PLT_ENTRY_WORD3 0 |
| 1720 | |
| 1721 | #define MAX_GOT_ENTRIES (64*1024 / 8) |
| 1722 | |
| 1723 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so" |
| 1724 | \f |
| 1725 | /* Handle an Alpha specific section when reading an object file. This |
| 1726 | is called when elfcode.h finds a section with an unknown type. |
| 1727 | FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure |
| 1728 | how to. */ |
| 1729 | |
| 1730 | static boolean |
| 1731 | elf64_alpha_section_from_shdr (abfd, hdr, name) |
| 1732 | bfd *abfd; |
| 1733 | Elf64_Internal_Shdr *hdr; |
| 1734 | char *name; |
| 1735 | { |
| 1736 | asection *newsect; |
| 1737 | |
| 1738 | /* There ought to be a place to keep ELF backend specific flags, but |
| 1739 | at the moment there isn't one. We just keep track of the |
| 1740 | sections by their name, instead. Fortunately, the ABI gives |
| 1741 | suggested names for all the MIPS specific sections, so we will |
| 1742 | probably get away with this. */ |
| 1743 | switch (hdr->sh_type) |
| 1744 | { |
| 1745 | case SHT_ALPHA_DEBUG: |
| 1746 | if (strcmp (name, ".mdebug") != 0) |
| 1747 | return false; |
| 1748 | break; |
| 1749 | #ifdef ERIC_neverdef |
| 1750 | case SHT_ALPHA_REGINFO: |
| 1751 | if (strcmp (name, ".reginfo") != 0 |
| 1752 | || hdr->sh_size != sizeof (Elf64_External_RegInfo)) |
| 1753 | return false; |
| 1754 | break; |
| 1755 | #endif |
| 1756 | default: |
| 1757 | return false; |
| 1758 | } |
| 1759 | |
| 1760 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) |
| 1761 | return false; |
| 1762 | newsect = hdr->bfd_section; |
| 1763 | |
| 1764 | if (hdr->sh_type == SHT_ALPHA_DEBUG) |
| 1765 | { |
| 1766 | if (! bfd_set_section_flags (abfd, newsect, |
| 1767 | (bfd_get_section_flags (abfd, newsect) |
| 1768 | | SEC_DEBUGGING))) |
| 1769 | return false; |
| 1770 | } |
| 1771 | |
| 1772 | #ifdef ERIC_neverdef |
| 1773 | /* For a .reginfo section, set the gp value in the tdata information |
| 1774 | from the contents of this section. We need the gp value while |
| 1775 | processing relocs, so we just get it now. */ |
| 1776 | if (hdr->sh_type == SHT_ALPHA_REGINFO) |
| 1777 | { |
| 1778 | Elf64_External_RegInfo ext; |
| 1779 | Elf64_RegInfo s; |
| 1780 | |
| 1781 | if (! bfd_get_section_contents (abfd, newsect, (PTR) &ext, |
| 1782 | (file_ptr) 0, sizeof ext)) |
| 1783 | return false; |
| 1784 | bfd_alpha_elf64_swap_reginfo_in (abfd, &ext, &s); |
| 1785 | elf_gp (abfd) = s.ri_gp_value; |
| 1786 | } |
| 1787 | #endif |
| 1788 | |
| 1789 | return true; |
| 1790 | } |
| 1791 | |
| 1792 | /* Set the correct type for an Alpha ELF section. We do this by the |
| 1793 | section name, which is a hack, but ought to work. */ |
| 1794 | |
| 1795 | static boolean |
| 1796 | elf64_alpha_fake_sections (abfd, hdr, sec) |
| 1797 | bfd *abfd; |
| 1798 | Elf64_Internal_Shdr *hdr; |
| 1799 | asection *sec; |
| 1800 | { |
| 1801 | register const char *name; |
| 1802 | |
| 1803 | name = bfd_get_section_name (abfd, sec); |
| 1804 | |
| 1805 | if (strcmp (name, ".mdebug") == 0) |
| 1806 | { |
| 1807 | hdr->sh_type = SHT_ALPHA_DEBUG; |
| 1808 | /* In a shared object on Irix 5.3, the .mdebug section has an |
| 1809 | entsize of 0. FIXME: Does this matter? */ |
| 1810 | if ((abfd->flags & DYNAMIC) != 0 ) |
| 1811 | hdr->sh_entsize = 0; |
| 1812 | else |
| 1813 | hdr->sh_entsize = 1; |
| 1814 | } |
| 1815 | #ifdef ERIC_neverdef |
| 1816 | else if (strcmp (name, ".reginfo") == 0) |
| 1817 | { |
| 1818 | hdr->sh_type = SHT_ALPHA_REGINFO; |
| 1819 | /* In a shared object on Irix 5.3, the .reginfo section has an |
| 1820 | entsize of 0x18. FIXME: Does this matter? */ |
| 1821 | if ((abfd->flags & DYNAMIC) != 0) |
| 1822 | hdr->sh_entsize = sizeof (Elf64_External_RegInfo); |
| 1823 | else |
| 1824 | hdr->sh_entsize = 1; |
| 1825 | |
| 1826 | /* Force the section size to the correct value, even if the |
| 1827 | linker thinks it is larger. The link routine below will only |
| 1828 | write out this much data for .reginfo. */ |
| 1829 | hdr->sh_size = sec->_raw_size = sizeof (Elf64_External_RegInfo); |
| 1830 | } |
| 1831 | else if (strcmp (name, ".hash") == 0 |
| 1832 | || strcmp (name, ".dynamic") == 0 |
| 1833 | || strcmp (name, ".dynstr") == 0) |
| 1834 | { |
| 1835 | hdr->sh_entsize = 0; |
| 1836 | hdr->sh_info = SIZEOF_ALPHA_DYNSYM_SECNAMES; |
| 1837 | } |
| 1838 | #endif |
| 1839 | else if (strcmp (name, ".sdata") == 0 |
| 1840 | || strcmp (name, ".sbss") == 0 |
| 1841 | || strcmp (name, ".lit4") == 0 |
| 1842 | || strcmp (name, ".lit8") == 0) |
| 1843 | hdr->sh_flags |= SHF_ALPHA_GPREL; |
| 1844 | |
| 1845 | return true; |
| 1846 | } |
| 1847 | |
| 1848 | /* Hook called by the linker routine which adds symbols from an object |
| 1849 | file. We use it to put .comm items in .sbss, and not .bss. */ |
| 1850 | |
| 1851 | static boolean |
| 1852 | elf64_alpha_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) |
| 1853 | bfd *abfd; |
| 1854 | struct bfd_link_info *info; |
| 1855 | const Elf_Internal_Sym *sym; |
| 1856 | const char **namep ATTRIBUTE_UNUSED; |
| 1857 | flagword *flagsp ATTRIBUTE_UNUSED; |
| 1858 | asection **secp; |
| 1859 | bfd_vma *valp; |
| 1860 | { |
| 1861 | if (sym->st_shndx == SHN_COMMON |
| 1862 | && !info->relocateable |
| 1863 | && sym->st_size <= elf_gp_size (abfd)) |
| 1864 | { |
| 1865 | /* Common symbols less than or equal to -G nn bytes are |
| 1866 | automatically put into .sbss. */ |
| 1867 | |
| 1868 | asection *scomm = bfd_get_section_by_name (abfd, ".scommon"); |
| 1869 | |
| 1870 | if (scomm == NULL) |
| 1871 | { |
| 1872 | scomm = bfd_make_section (abfd, ".scommon"); |
| 1873 | if (scomm == NULL |
| 1874 | || !bfd_set_section_flags (abfd, scomm, (SEC_ALLOC |
| 1875 | | SEC_IS_COMMON |
| 1876 | | SEC_LINKER_CREATED))) |
| 1877 | return false; |
| 1878 | } |
| 1879 | |
| 1880 | *secp = scomm; |
| 1881 | *valp = sym->st_size; |
| 1882 | } |
| 1883 | |
| 1884 | return true; |
| 1885 | } |
| 1886 | |
| 1887 | /* Create the .got section. */ |
| 1888 | |
| 1889 | static boolean |
| 1890 | elf64_alpha_create_got_section(abfd, info) |
| 1891 | bfd *abfd; |
| 1892 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 1893 | { |
| 1894 | asection *s; |
| 1895 | |
| 1896 | if (bfd_get_section_by_name (abfd, ".got")) |
| 1897 | return true; |
| 1898 | |
| 1899 | s = bfd_make_section (abfd, ".got"); |
| 1900 | if (s == NULL |
| 1901 | || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD |
| 1902 | | SEC_HAS_CONTENTS |
| 1903 | | SEC_IN_MEMORY |
| 1904 | | SEC_LINKER_CREATED)) |
| 1905 | || !bfd_set_section_alignment (abfd, s, 3)) |
| 1906 | return false; |
| 1907 | |
| 1908 | alpha_elf_tdata (abfd)->got = s; |
| 1909 | |
| 1910 | return true; |
| 1911 | } |
| 1912 | |
| 1913 | /* Create all the dynamic sections. */ |
| 1914 | |
| 1915 | static boolean |
| 1916 | elf64_alpha_create_dynamic_sections (abfd, info) |
| 1917 | bfd *abfd; |
| 1918 | struct bfd_link_info *info; |
| 1919 | { |
| 1920 | asection *s; |
| 1921 | struct elf_link_hash_entry *h; |
| 1922 | |
| 1923 | /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */ |
| 1924 | |
| 1925 | s = bfd_make_section (abfd, ".plt"); |
| 1926 | if (s == NULL |
| 1927 | || ! bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD |
| 1928 | | SEC_HAS_CONTENTS |
| 1929 | | SEC_IN_MEMORY |
| 1930 | | SEC_LINKER_CREATED |
| 1931 | | SEC_CODE)) |
| 1932 | || ! bfd_set_section_alignment (abfd, s, 3)) |
| 1933 | return false; |
| 1934 | |
| 1935 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
| 1936 | .plt section. */ |
| 1937 | h = NULL; |
| 1938 | if (! (_bfd_generic_link_add_one_symbol |
| 1939 | (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, |
| 1940 | (bfd_vma) 0, (const char *) NULL, false, |
| 1941 | get_elf_backend_data (abfd)->collect, |
| 1942 | (struct bfd_link_hash_entry **) &h))) |
| 1943 | return false; |
| 1944 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
| 1945 | h->type = STT_OBJECT; |
| 1946 | |
| 1947 | if (info->shared |
| 1948 | && ! _bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1949 | return false; |
| 1950 | |
| 1951 | s = bfd_make_section (abfd, ".rela.plt"); |
| 1952 | if (s == NULL |
| 1953 | || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD |
| 1954 | | SEC_HAS_CONTENTS |
| 1955 | | SEC_IN_MEMORY |
| 1956 | | SEC_LINKER_CREATED |
| 1957 | | SEC_READONLY)) |
| 1958 | || ! bfd_set_section_alignment (abfd, s, 3)) |
| 1959 | return false; |
| 1960 | |
| 1961 | /* We may or may not have created a .got section for this object, but |
| 1962 | we definitely havn't done the rest of the work. */ |
| 1963 | |
| 1964 | if (!elf64_alpha_create_got_section (abfd, info)) |
| 1965 | return false; |
| 1966 | |
| 1967 | s = bfd_make_section(abfd, ".rela.got"); |
| 1968 | if (s == NULL |
| 1969 | || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD |
| 1970 | | SEC_HAS_CONTENTS |
| 1971 | | SEC_IN_MEMORY |
| 1972 | | SEC_LINKER_CREATED |
| 1973 | | SEC_READONLY)) |
| 1974 | || !bfd_set_section_alignment (abfd, s, 3)) |
| 1975 | return false; |
| 1976 | |
| 1977 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the |
| 1978 | dynobj's .got section. We don't do this in the linker script |
| 1979 | because we don't want to define the symbol if we are not creating |
| 1980 | a global offset table. */ |
| 1981 | h = NULL; |
| 1982 | if (!(_bfd_generic_link_add_one_symbol |
| 1983 | (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, |
| 1984 | alpha_elf_tdata(abfd)->got, (bfd_vma) 0, (const char *) NULL, |
| 1985 | false, get_elf_backend_data (abfd)->collect, |
| 1986 | (struct bfd_link_hash_entry **) &h))) |
| 1987 | return false; |
| 1988 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
| 1989 | h->type = STT_OBJECT; |
| 1990 | |
| 1991 | if (info->shared |
| 1992 | && ! _bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1993 | return false; |
| 1994 | |
| 1995 | elf_hash_table (info)->hgot = h; |
| 1996 | |
| 1997 | return true; |
| 1998 | } |
| 1999 | \f |
| 2000 | /* Read ECOFF debugging information from a .mdebug section into a |
| 2001 | ecoff_debug_info structure. */ |
| 2002 | |
| 2003 | static boolean |
| 2004 | elf64_alpha_read_ecoff_info (abfd, section, debug) |
| 2005 | bfd *abfd; |
| 2006 | asection *section; |
| 2007 | struct ecoff_debug_info *debug; |
| 2008 | { |
| 2009 | HDRR *symhdr; |
| 2010 | const struct ecoff_debug_swap *swap; |
| 2011 | char *ext_hdr = NULL; |
| 2012 | |
| 2013 | swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 2014 | memset (debug, 0, sizeof (*debug)); |
| 2015 | |
| 2016 | ext_hdr = (char *) bfd_malloc ((size_t) swap->external_hdr_size); |
| 2017 | if (ext_hdr == NULL && swap->external_hdr_size != 0) |
| 2018 | goto error_return; |
| 2019 | |
| 2020 | if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0, |
| 2021 | swap->external_hdr_size) |
| 2022 | == false) |
| 2023 | goto error_return; |
| 2024 | |
| 2025 | symhdr = &debug->symbolic_header; |
| 2026 | (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr); |
| 2027 | |
| 2028 | /* The symbolic header contains absolute file offsets and sizes to |
| 2029 | read. */ |
| 2030 | #define READ(ptr, offset, count, size, type) \ |
| 2031 | if (symhdr->count == 0) \ |
| 2032 | debug->ptr = NULL; \ |
| 2033 | else \ |
| 2034 | { \ |
| 2035 | debug->ptr = (type) bfd_malloc ((size_t) (size * symhdr->count)); \ |
| 2036 | if (debug->ptr == NULL) \ |
| 2037 | goto error_return; \ |
| 2038 | if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \ |
| 2039 | || (bfd_read (debug->ptr, size, symhdr->count, \ |
| 2040 | abfd) != size * symhdr->count)) \ |
| 2041 | goto error_return; \ |
| 2042 | } |
| 2043 | |
| 2044 | READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *); |
| 2045 | READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR); |
| 2046 | READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR); |
| 2047 | READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR); |
| 2048 | READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR); |
| 2049 | READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext), |
| 2050 | union aux_ext *); |
| 2051 | READ (ss, cbSsOffset, issMax, sizeof (char), char *); |
| 2052 | READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *); |
| 2053 | READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR); |
| 2054 | READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR); |
| 2055 | READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR); |
| 2056 | #undef READ |
| 2057 | |
| 2058 | debug->fdr = NULL; |
| 2059 | debug->adjust = NULL; |
| 2060 | |
| 2061 | return true; |
| 2062 | |
| 2063 | error_return: |
| 2064 | if (ext_hdr != NULL) |
| 2065 | free (ext_hdr); |
| 2066 | if (debug->line != NULL) |
| 2067 | free (debug->line); |
| 2068 | if (debug->external_dnr != NULL) |
| 2069 | free (debug->external_dnr); |
| 2070 | if (debug->external_pdr != NULL) |
| 2071 | free (debug->external_pdr); |
| 2072 | if (debug->external_sym != NULL) |
| 2073 | free (debug->external_sym); |
| 2074 | if (debug->external_opt != NULL) |
| 2075 | free (debug->external_opt); |
| 2076 | if (debug->external_aux != NULL) |
| 2077 | free (debug->external_aux); |
| 2078 | if (debug->ss != NULL) |
| 2079 | free (debug->ss); |
| 2080 | if (debug->ssext != NULL) |
| 2081 | free (debug->ssext); |
| 2082 | if (debug->external_fdr != NULL) |
| 2083 | free (debug->external_fdr); |
| 2084 | if (debug->external_rfd != NULL) |
| 2085 | free (debug->external_rfd); |
| 2086 | if (debug->external_ext != NULL) |
| 2087 | free (debug->external_ext); |
| 2088 | return false; |
| 2089 | } |
| 2090 | |
| 2091 | /* Alpha ELF local labels start with '$'. */ |
| 2092 | |
| 2093 | static boolean |
| 2094 | elf64_alpha_is_local_label_name (abfd, name) |
| 2095 | bfd *abfd ATTRIBUTE_UNUSED; |
| 2096 | const char *name; |
| 2097 | { |
| 2098 | return name[0] == '$'; |
| 2099 | } |
| 2100 | |
| 2101 | /* Alpha ELF follows MIPS ELF in using a special find_nearest_line |
| 2102 | routine in order to handle the ECOFF debugging information. We |
| 2103 | still call this mips_elf_find_line because of the slot |
| 2104 | find_line_info in elf_obj_tdata is declared that way. */ |
| 2105 | |
| 2106 | struct mips_elf_find_line |
| 2107 | { |
| 2108 | struct ecoff_debug_info d; |
| 2109 | struct ecoff_find_line i; |
| 2110 | }; |
| 2111 | |
| 2112 | static boolean |
| 2113 | elf64_alpha_find_nearest_line (abfd, section, symbols, offset, filename_ptr, |
| 2114 | functionname_ptr, line_ptr) |
| 2115 | bfd *abfd; |
| 2116 | asection *section; |
| 2117 | asymbol **symbols; |
| 2118 | bfd_vma offset; |
| 2119 | const char **filename_ptr; |
| 2120 | const char **functionname_ptr; |
| 2121 | unsigned int *line_ptr; |
| 2122 | { |
| 2123 | asection *msec; |
| 2124 | |
| 2125 | if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, |
| 2126 | filename_ptr, functionname_ptr, |
| 2127 | line_ptr, 0, |
| 2128 | &elf_tdata (abfd)->dwarf2_find_line_info)) |
| 2129 | return true; |
| 2130 | |
| 2131 | msec = bfd_get_section_by_name (abfd, ".mdebug"); |
| 2132 | if (msec != NULL) |
| 2133 | { |
| 2134 | flagword origflags; |
| 2135 | struct mips_elf_find_line *fi; |
| 2136 | const struct ecoff_debug_swap * const swap = |
| 2137 | get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 2138 | |
| 2139 | /* If we are called during a link, alpha_elf_final_link may have |
| 2140 | cleared the SEC_HAS_CONTENTS field. We force it back on here |
| 2141 | if appropriate (which it normally will be). */ |
| 2142 | origflags = msec->flags; |
| 2143 | if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS) |
| 2144 | msec->flags |= SEC_HAS_CONTENTS; |
| 2145 | |
| 2146 | fi = elf_tdata (abfd)->find_line_info; |
| 2147 | if (fi == NULL) |
| 2148 | { |
| 2149 | bfd_size_type external_fdr_size; |
| 2150 | char *fraw_src; |
| 2151 | char *fraw_end; |
| 2152 | struct fdr *fdr_ptr; |
| 2153 | |
| 2154 | fi = ((struct mips_elf_find_line *) |
| 2155 | bfd_zalloc (abfd, sizeof (struct mips_elf_find_line))); |
| 2156 | if (fi == NULL) |
| 2157 | { |
| 2158 | msec->flags = origflags; |
| 2159 | return false; |
| 2160 | } |
| 2161 | |
| 2162 | if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d)) |
| 2163 | { |
| 2164 | msec->flags = origflags; |
| 2165 | return false; |
| 2166 | } |
| 2167 | |
| 2168 | /* Swap in the FDR information. */ |
| 2169 | fi->d.fdr = ((struct fdr *) |
| 2170 | bfd_alloc (abfd, |
| 2171 | (fi->d.symbolic_header.ifdMax * |
| 2172 | sizeof (struct fdr)))); |
| 2173 | if (fi->d.fdr == NULL) |
| 2174 | { |
| 2175 | msec->flags = origflags; |
| 2176 | return false; |
| 2177 | } |
| 2178 | external_fdr_size = swap->external_fdr_size; |
| 2179 | fdr_ptr = fi->d.fdr; |
| 2180 | fraw_src = (char *) fi->d.external_fdr; |
| 2181 | fraw_end = (fraw_src |
| 2182 | + fi->d.symbolic_header.ifdMax * external_fdr_size); |
| 2183 | for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++) |
| 2184 | (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr); |
| 2185 | |
| 2186 | elf_tdata (abfd)->find_line_info = fi; |
| 2187 | |
| 2188 | /* Note that we don't bother to ever free this information. |
| 2189 | find_nearest_line is either called all the time, as in |
| 2190 | objdump -l, so the information should be saved, or it is |
| 2191 | rarely called, as in ld error messages, so the memory |
| 2192 | wasted is unimportant. Still, it would probably be a |
| 2193 | good idea for free_cached_info to throw it away. */ |
| 2194 | } |
| 2195 | |
| 2196 | if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap, |
| 2197 | &fi->i, filename_ptr, functionname_ptr, |
| 2198 | line_ptr)) |
| 2199 | { |
| 2200 | msec->flags = origflags; |
| 2201 | return true; |
| 2202 | } |
| 2203 | |
| 2204 | msec->flags = origflags; |
| 2205 | } |
| 2206 | |
| 2207 | /* Fall back on the generic ELF find_nearest_line routine. */ |
| 2208 | |
| 2209 | return _bfd_elf_find_nearest_line (abfd, section, symbols, offset, |
| 2210 | filename_ptr, functionname_ptr, |
| 2211 | line_ptr); |
| 2212 | } |
| 2213 | \f |
| 2214 | /* Structure used to pass information to alpha_elf_output_extsym. */ |
| 2215 | |
| 2216 | struct extsym_info |
| 2217 | { |
| 2218 | bfd *abfd; |
| 2219 | struct bfd_link_info *info; |
| 2220 | struct ecoff_debug_info *debug; |
| 2221 | const struct ecoff_debug_swap *swap; |
| 2222 | boolean failed; |
| 2223 | }; |
| 2224 | |
| 2225 | static boolean |
| 2226 | elf64_alpha_output_extsym (h, data) |
| 2227 | struct alpha_elf_link_hash_entry *h; |
| 2228 | PTR data; |
| 2229 | { |
| 2230 | struct extsym_info *einfo = (struct extsym_info *) data; |
| 2231 | boolean strip; |
| 2232 | asection *sec, *output_section; |
| 2233 | |
| 2234 | if (h->root.indx == -2) |
| 2235 | strip = false; |
| 2236 | else if (((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 2237 | || (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) |
| 2238 | && (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 |
| 2239 | && (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) |
| 2240 | strip = true; |
| 2241 | else if (einfo->info->strip == strip_all |
| 2242 | || (einfo->info->strip == strip_some |
| 2243 | && bfd_hash_lookup (einfo->info->keep_hash, |
| 2244 | h->root.root.root.string, |
| 2245 | false, false) == NULL)) |
| 2246 | strip = true; |
| 2247 | else |
| 2248 | strip = false; |
| 2249 | |
| 2250 | if (strip) |
| 2251 | return true; |
| 2252 | |
| 2253 | if (h->esym.ifd == -2) |
| 2254 | { |
| 2255 | h->esym.jmptbl = 0; |
| 2256 | h->esym.cobol_main = 0; |
| 2257 | h->esym.weakext = 0; |
| 2258 | h->esym.reserved = 0; |
| 2259 | h->esym.ifd = ifdNil; |
| 2260 | h->esym.asym.value = 0; |
| 2261 | h->esym.asym.st = stGlobal; |
| 2262 | |
| 2263 | if (h->root.root.type != bfd_link_hash_defined |
| 2264 | && h->root.root.type != bfd_link_hash_defweak) |
| 2265 | h->esym.asym.sc = scAbs; |
| 2266 | else |
| 2267 | { |
| 2268 | const char *name; |
| 2269 | |
| 2270 | sec = h->root.root.u.def.section; |
| 2271 | output_section = sec->output_section; |
| 2272 | |
| 2273 | /* When making a shared library and symbol h is the one from |
| 2274 | the another shared library, OUTPUT_SECTION may be null. */ |
| 2275 | if (output_section == NULL) |
| 2276 | h->esym.asym.sc = scUndefined; |
| 2277 | else |
| 2278 | { |
| 2279 | name = bfd_section_name (output_section->owner, output_section); |
| 2280 | |
| 2281 | if (strcmp (name, ".text") == 0) |
| 2282 | h->esym.asym.sc = scText; |
| 2283 | else if (strcmp (name, ".data") == 0) |
| 2284 | h->esym.asym.sc = scData; |
| 2285 | else if (strcmp (name, ".sdata") == 0) |
| 2286 | h->esym.asym.sc = scSData; |
| 2287 | else if (strcmp (name, ".rodata") == 0 |
| 2288 | || strcmp (name, ".rdata") == 0) |
| 2289 | h->esym.asym.sc = scRData; |
| 2290 | else if (strcmp (name, ".bss") == 0) |
| 2291 | h->esym.asym.sc = scBss; |
| 2292 | else if (strcmp (name, ".sbss") == 0) |
| 2293 | h->esym.asym.sc = scSBss; |
| 2294 | else if (strcmp (name, ".init") == 0) |
| 2295 | h->esym.asym.sc = scInit; |
| 2296 | else if (strcmp (name, ".fini") == 0) |
| 2297 | h->esym.asym.sc = scFini; |
| 2298 | else |
| 2299 | h->esym.asym.sc = scAbs; |
| 2300 | } |
| 2301 | } |
| 2302 | |
| 2303 | h->esym.asym.reserved = 0; |
| 2304 | h->esym.asym.index = indexNil; |
| 2305 | } |
| 2306 | |
| 2307 | if (h->root.root.type == bfd_link_hash_common) |
| 2308 | h->esym.asym.value = h->root.root.u.c.size; |
| 2309 | else if (h->root.root.type == bfd_link_hash_defined |
| 2310 | || h->root.root.type == bfd_link_hash_defweak) |
| 2311 | { |
| 2312 | if (h->esym.asym.sc == scCommon) |
| 2313 | h->esym.asym.sc = scBss; |
| 2314 | else if (h->esym.asym.sc == scSCommon) |
| 2315 | h->esym.asym.sc = scSBss; |
| 2316 | |
| 2317 | sec = h->root.root.u.def.section; |
| 2318 | output_section = sec->output_section; |
| 2319 | if (output_section != NULL) |
| 2320 | h->esym.asym.value = (h->root.root.u.def.value |
| 2321 | + sec->output_offset |
| 2322 | + output_section->vma); |
| 2323 | else |
| 2324 | h->esym.asym.value = 0; |
| 2325 | } |
| 2326 | else if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| 2327 | { |
| 2328 | /* Set type and value for a symbol with a function stub. */ |
| 2329 | h->esym.asym.st = stProc; |
| 2330 | sec = bfd_get_section_by_name (einfo->abfd, ".plt"); |
| 2331 | if (sec == NULL) |
| 2332 | h->esym.asym.value = 0; |
| 2333 | else |
| 2334 | { |
| 2335 | output_section = sec->output_section; |
| 2336 | if (output_section != NULL) |
| 2337 | h->esym.asym.value = (h->root.plt.offset |
| 2338 | + sec->output_offset |
| 2339 | + output_section->vma); |
| 2340 | else |
| 2341 | h->esym.asym.value = 0; |
| 2342 | } |
| 2343 | #if 0 /* FIXME? */ |
| 2344 | h->esym.ifd = 0; |
| 2345 | #endif |
| 2346 | } |
| 2347 | |
| 2348 | if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap, |
| 2349 | h->root.root.root.string, |
| 2350 | &h->esym)) |
| 2351 | { |
| 2352 | einfo->failed = true; |
| 2353 | return false; |
| 2354 | } |
| 2355 | |
| 2356 | return true; |
| 2357 | } |
| 2358 | |
| 2359 | /* FIXME: Create a runtime procedure table from the .mdebug section. |
| 2360 | |
| 2361 | static boolean |
| 2362 | mips_elf_create_procedure_table (handle, abfd, info, s, debug) |
| 2363 | PTR handle; |
| 2364 | bfd *abfd; |
| 2365 | struct bfd_link_info *info; |
| 2366 | asection *s; |
| 2367 | struct ecoff_debug_info *debug; |
| 2368 | */ |
| 2369 | \f |
| 2370 | /* Handle dynamic relocations when doing an Alpha ELF link. */ |
| 2371 | |
| 2372 | static boolean |
| 2373 | elf64_alpha_check_relocs (abfd, info, sec, relocs) |
| 2374 | bfd *abfd; |
| 2375 | struct bfd_link_info *info; |
| 2376 | asection *sec; |
| 2377 | const Elf_Internal_Rela *relocs; |
| 2378 | { |
| 2379 | bfd *dynobj; |
| 2380 | asection *sreloc; |
| 2381 | const char *rel_sec_name; |
| 2382 | Elf_Internal_Shdr *symtab_hdr; |
| 2383 | struct alpha_elf_link_hash_entry **sym_hashes; |
| 2384 | struct alpha_elf_got_entry **local_got_entries; |
| 2385 | const Elf_Internal_Rela *rel, *relend; |
| 2386 | int got_created; |
| 2387 | |
| 2388 | if (info->relocateable) |
| 2389 | return true; |
| 2390 | |
| 2391 | dynobj = elf_hash_table(info)->dynobj; |
| 2392 | if (dynobj == NULL) |
| 2393 | elf_hash_table(info)->dynobj = dynobj = abfd; |
| 2394 | |
| 2395 | sreloc = NULL; |
| 2396 | rel_sec_name = NULL; |
| 2397 | symtab_hdr = &elf_tdata(abfd)->symtab_hdr; |
| 2398 | sym_hashes = alpha_elf_sym_hashes(abfd); |
| 2399 | local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; |
| 2400 | got_created = 0; |
| 2401 | |
| 2402 | relend = relocs + sec->reloc_count; |
| 2403 | for (rel = relocs; rel < relend; ++rel) |
| 2404 | { |
| 2405 | unsigned long r_symndx, r_type; |
| 2406 | struct alpha_elf_link_hash_entry *h; |
| 2407 | |
| 2408 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 2409 | if (r_symndx < symtab_hdr->sh_info) |
| 2410 | h = NULL; |
| 2411 | else |
| 2412 | { |
| 2413 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 2414 | |
| 2415 | while (h->root.root.type == bfd_link_hash_indirect |
| 2416 | || h->root.root.type == bfd_link_hash_warning) |
| 2417 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; |
| 2418 | |
| 2419 | h->root.elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; |
| 2420 | } |
| 2421 | r_type = ELF64_R_TYPE (rel->r_info); |
| 2422 | |
| 2423 | switch (r_type) |
| 2424 | { |
| 2425 | case R_ALPHA_LITERAL: |
| 2426 | { |
| 2427 | struct alpha_elf_got_entry *gotent; |
| 2428 | int flags = 0; |
| 2429 | |
| 2430 | if (h) |
| 2431 | { |
| 2432 | /* Search for and possibly create a got entry. */ |
| 2433 | for (gotent = h->got_entries; gotent ; gotent = gotent->next) |
| 2434 | if (gotent->gotobj == abfd && |
| 2435 | gotent->addend == rel->r_addend) |
| 2436 | break; |
| 2437 | |
| 2438 | if (!gotent) |
| 2439 | { |
| 2440 | gotent = ((struct alpha_elf_got_entry *) |
| 2441 | bfd_alloc (abfd, |
| 2442 | sizeof (struct alpha_elf_got_entry))); |
| 2443 | if (!gotent) |
| 2444 | return false; |
| 2445 | |
| 2446 | gotent->gotobj = abfd; |
| 2447 | gotent->addend = rel->r_addend; |
| 2448 | gotent->got_offset = -1; |
| 2449 | gotent->flags = 0; |
| 2450 | gotent->use_count = 1; |
| 2451 | |
| 2452 | gotent->next = h->got_entries; |
| 2453 | h->got_entries = gotent; |
| 2454 | |
| 2455 | alpha_elf_tdata (abfd)->total_got_entries++; |
| 2456 | } |
| 2457 | else |
| 2458 | gotent->use_count += 1; |
| 2459 | } |
| 2460 | else |
| 2461 | { |
| 2462 | /* This is a local .got entry -- record for merge. */ |
| 2463 | if (!local_got_entries) |
| 2464 | { |
| 2465 | size_t size; |
| 2466 | size = (symtab_hdr->sh_info |
| 2467 | * sizeof (struct alpha_elf_got_entry *)); |
| 2468 | |
| 2469 | local_got_entries = ((struct alpha_elf_got_entry **) |
| 2470 | bfd_alloc (abfd, size)); |
| 2471 | if (!local_got_entries) |
| 2472 | return false; |
| 2473 | |
| 2474 | memset (local_got_entries, 0, size); |
| 2475 | alpha_elf_tdata (abfd)->local_got_entries = |
| 2476 | local_got_entries; |
| 2477 | } |
| 2478 | |
| 2479 | for (gotent = local_got_entries[ELF64_R_SYM(rel->r_info)]; |
| 2480 | gotent != NULL && gotent->addend != rel->r_addend; |
| 2481 | gotent = gotent->next) |
| 2482 | continue; |
| 2483 | if (!gotent) |
| 2484 | { |
| 2485 | gotent = ((struct alpha_elf_got_entry *) |
| 2486 | bfd_alloc (abfd, |
| 2487 | sizeof (struct alpha_elf_got_entry))); |
| 2488 | if (!gotent) |
| 2489 | return false; |
| 2490 | |
| 2491 | gotent->gotobj = abfd; |
| 2492 | gotent->addend = rel->r_addend; |
| 2493 | gotent->got_offset = -1; |
| 2494 | gotent->flags = 0; |
| 2495 | gotent->use_count = 1; |
| 2496 | |
| 2497 | gotent->next = local_got_entries[ELF64_R_SYM(rel->r_info)]; |
| 2498 | local_got_entries[ELF64_R_SYM(rel->r_info)] = gotent; |
| 2499 | |
| 2500 | alpha_elf_tdata(abfd)->total_got_entries++; |
| 2501 | alpha_elf_tdata(abfd)->n_local_got_entries++; |
| 2502 | } |
| 2503 | else |
| 2504 | gotent->use_count += 1; |
| 2505 | } |
| 2506 | |
| 2507 | /* Remember how this literal is used from its LITUSEs. |
| 2508 | This will be important when it comes to decide if we can |
| 2509 | create a .plt entry for a function symbol. */ |
| 2510 | if (rel+1 < relend |
| 2511 | && ELF64_R_TYPE (rel[1].r_info) == R_ALPHA_LITUSE) |
| 2512 | { |
| 2513 | do |
| 2514 | { |
| 2515 | ++rel; |
| 2516 | if (rel->r_addend >= 1 && rel->r_addend <= 3) |
| 2517 | flags |= 1 << rel->r_addend; |
| 2518 | } |
| 2519 | while (rel+1 < relend && |
| 2520 | ELF64_R_TYPE (rel[1].r_info) == R_ALPHA_LITUSE); |
| 2521 | } |
| 2522 | else |
| 2523 | { |
| 2524 | /* No LITUSEs -- presumably the address is not being |
| 2525 | loaded for nothing. */ |
| 2526 | flags = ALPHA_ELF_LINK_HASH_LU_ADDR; |
| 2527 | } |
| 2528 | |
| 2529 | gotent->flags |= flags; |
| 2530 | if (h) |
| 2531 | { |
| 2532 | /* Make a guess as to whether a .plt entry will be needed. */ |
| 2533 | if ((h->flags |= flags) == ALPHA_ELF_LINK_HASH_LU_FUNC) |
| 2534 | h->root.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 2535 | else |
| 2536 | h->root.elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 2537 | } |
| 2538 | } |
| 2539 | /* FALLTHRU */ |
| 2540 | |
| 2541 | case R_ALPHA_GPDISP: |
| 2542 | case R_ALPHA_GPREL32: |
| 2543 | case R_ALPHA_GPRELHIGH: |
| 2544 | case R_ALPHA_GPRELLOW: |
| 2545 | /* We don't actually use the .got here, but the sections must |
| 2546 | be created before the linker maps input sections to output |
| 2547 | sections. */ |
| 2548 | if (!got_created) |
| 2549 | { |
| 2550 | if (!elf64_alpha_create_got_section (abfd, info)) |
| 2551 | return false; |
| 2552 | |
| 2553 | /* Make sure the object's gotobj is set to itself so |
| 2554 | that we default to every object with its own .got. |
| 2555 | We'll merge .gots later once we've collected each |
| 2556 | object's info. */ |
| 2557 | alpha_elf_tdata(abfd)->gotobj = abfd; |
| 2558 | |
| 2559 | got_created = 1; |
| 2560 | } |
| 2561 | break; |
| 2562 | |
| 2563 | case R_ALPHA_SREL16: |
| 2564 | case R_ALPHA_SREL32: |
| 2565 | case R_ALPHA_SREL64: |
| 2566 | if (h == NULL) |
| 2567 | break; |
| 2568 | /* FALLTHRU */ |
| 2569 | |
| 2570 | case R_ALPHA_REFLONG: |
| 2571 | case R_ALPHA_REFQUAD: |
| 2572 | if (rel_sec_name == NULL) |
| 2573 | { |
| 2574 | rel_sec_name = (bfd_elf_string_from_elf_section |
| 2575 | (abfd, elf_elfheader(abfd)->e_shstrndx, |
| 2576 | elf_section_data(sec)->rel_hdr.sh_name)); |
| 2577 | if (rel_sec_name == NULL) |
| 2578 | return false; |
| 2579 | |
| 2580 | BFD_ASSERT (strncmp (rel_sec_name, ".rela", 5) == 0 |
| 2581 | && strcmp (bfd_get_section_name (abfd, sec), |
| 2582 | rel_sec_name+5) == 0); |
| 2583 | } |
| 2584 | |
| 2585 | /* We need to create the section here now whether we eventually |
| 2586 | use it or not so that it gets mapped to an output section by |
| 2587 | the linker. If not used, we'll kill it in |
| 2588 | size_dynamic_sections. */ |
| 2589 | if (sreloc == NULL) |
| 2590 | { |
| 2591 | sreloc = bfd_get_section_by_name (dynobj, rel_sec_name); |
| 2592 | if (sreloc == NULL) |
| 2593 | { |
| 2594 | sreloc = bfd_make_section (dynobj, rel_sec_name); |
| 2595 | if (sreloc == NULL |
| 2596 | || !bfd_set_section_flags (dynobj, sreloc, |
| 2597 | (((sec->flags |
| 2598 | & SEC_ALLOC) |
| 2599 | ? (SEC_ALLOC |
| 2600 | | SEC_LOAD) : 0) |
| 2601 | | SEC_HAS_CONTENTS |
| 2602 | | SEC_IN_MEMORY |
| 2603 | | SEC_LINKER_CREATED |
| 2604 | | SEC_READONLY)) |
| 2605 | || !bfd_set_section_alignment (dynobj, sreloc, 3)) |
| 2606 | return false; |
| 2607 | } |
| 2608 | } |
| 2609 | |
| 2610 | if (h) |
| 2611 | { |
| 2612 | /* Since we havn't seen all of the input symbols yet, we |
| 2613 | don't know whether we'll actually need a dynamic relocation |
| 2614 | entry for this reloc. So make a record of it. Once we |
| 2615 | find out if this thing needs dynamic relocation we'll |
| 2616 | expand the relocation sections by the appropriate amount. */ |
| 2617 | |
| 2618 | struct alpha_elf_reloc_entry *rent; |
| 2619 | |
| 2620 | for (rent = h->reloc_entries; rent; rent = rent->next) |
| 2621 | if (rent->rtype == r_type && rent->srel == sreloc) |
| 2622 | break; |
| 2623 | |
| 2624 | if (!rent) |
| 2625 | { |
| 2626 | rent = ((struct alpha_elf_reloc_entry *) |
| 2627 | bfd_alloc (abfd, |
| 2628 | sizeof (struct alpha_elf_reloc_entry))); |
| 2629 | if (!rent) |
| 2630 | return false; |
| 2631 | |
| 2632 | rent->srel = sreloc; |
| 2633 | rent->rtype = r_type; |
| 2634 | rent->count = 1; |
| 2635 | rent->reltext = (sec->flags & SEC_READONLY) != 0; |
| 2636 | |
| 2637 | rent->next = h->reloc_entries; |
| 2638 | h->reloc_entries = rent; |
| 2639 | } |
| 2640 | else |
| 2641 | rent->count++; |
| 2642 | } |
| 2643 | else if (info->shared && (sec->flags & SEC_ALLOC)) |
| 2644 | { |
| 2645 | /* If this is a shared library, and the section is to be |
| 2646 | loaded into memory, we need a RELATIVE reloc. */ |
| 2647 | sreloc->_raw_size += sizeof (Elf64_External_Rela); |
| 2648 | if (sec->flags & SEC_READONLY) |
| 2649 | info->flags |= DF_TEXTREL; |
| 2650 | } |
| 2651 | break; |
| 2652 | } |
| 2653 | } |
| 2654 | |
| 2655 | return true; |
| 2656 | } |
| 2657 | |
| 2658 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 2659 | regular object. The current definition is in some section of the |
| 2660 | dynamic object, but we're not including those sections. We have to |
| 2661 | change the definition to something the rest of the link can |
| 2662 | understand. */ |
| 2663 | |
| 2664 | static boolean |
| 2665 | elf64_alpha_adjust_dynamic_symbol (info, h) |
| 2666 | struct bfd_link_info *info; |
| 2667 | struct elf_link_hash_entry *h; |
| 2668 | { |
| 2669 | bfd *dynobj; |
| 2670 | asection *s; |
| 2671 | struct alpha_elf_link_hash_entry *ah; |
| 2672 | |
| 2673 | dynobj = elf_hash_table(info)->dynobj; |
| 2674 | ah = (struct alpha_elf_link_hash_entry *)h; |
| 2675 | |
| 2676 | /* Now that we've seen all of the input symbols, finalize our decision |
| 2677 | about whether this symbol should get a .plt entry. */ |
| 2678 | |
| 2679 | if (h->root.type != bfd_link_hash_undefweak |
| 2680 | && alpha_elf_dynamic_symbol_p (h, info) |
| 2681 | && ((h->type == STT_FUNC |
| 2682 | && !(ah->flags & ALPHA_ELF_LINK_HASH_LU_ADDR)) |
| 2683 | || (h->type == STT_NOTYPE |
| 2684 | && ah->flags == ALPHA_ELF_LINK_HASH_LU_FUNC)) |
| 2685 | /* Don't prevent otherwise valid programs from linking by attempting |
| 2686 | to create a new .got entry somewhere. A Correct Solution would be |
| 2687 | to add a new .got section to a new object file and let it be merged |
| 2688 | somewhere later. But for now don't bother. */ |
| 2689 | && ah->got_entries) |
| 2690 | { |
| 2691 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 2692 | |
| 2693 | s = bfd_get_section_by_name(dynobj, ".plt"); |
| 2694 | if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info)) |
| 2695 | return false; |
| 2696 | |
| 2697 | /* The first bit of the .plt is reserved. */ |
| 2698 | if (s->_raw_size == 0) |
| 2699 | s->_raw_size = PLT_HEADER_SIZE; |
| 2700 | |
| 2701 | h->plt.offset = s->_raw_size; |
| 2702 | s->_raw_size += PLT_ENTRY_SIZE; |
| 2703 | |
| 2704 | /* If this symbol is not defined in a regular file, and we are not |
| 2705 | generating a shared library, then set the symbol to the location |
| 2706 | in the .plt. This is required to make function pointers compare |
| 2707 | equal between the normal executable and the shared library. */ |
| 2708 | if (! info->shared |
| 2709 | && h->root.type != bfd_link_hash_defweak) |
| 2710 | { |
| 2711 | h->root.u.def.section = s; |
| 2712 | h->root.u.def.value = h->plt.offset; |
| 2713 | } |
| 2714 | |
| 2715 | /* We also need a JMP_SLOT entry in the .rela.plt section. */ |
| 2716 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 2717 | BFD_ASSERT (s != NULL); |
| 2718 | s->_raw_size += sizeof (Elf64_External_Rela); |
| 2719 | |
| 2720 | return true; |
| 2721 | } |
| 2722 | else |
| 2723 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 2724 | |
| 2725 | /* If this is a weak symbol, and there is a real definition, the |
| 2726 | processor independent code will have arranged for us to see the |
| 2727 | real definition first, and we can just use the same value. */ |
| 2728 | if (h->weakdef != NULL) |
| 2729 | { |
| 2730 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
| 2731 | || h->weakdef->root.type == bfd_link_hash_defweak); |
| 2732 | h->root.u.def.section = h->weakdef->root.u.def.section; |
| 2733 | h->root.u.def.value = h->weakdef->root.u.def.value; |
| 2734 | return true; |
| 2735 | } |
| 2736 | |
| 2737 | /* This is a reference to a symbol defined by a dynamic object which |
| 2738 | is not a function. The Alpha, since it uses .got entries for all |
| 2739 | symbols even in regular objects, does not need the hackery of a |
| 2740 | .dynbss section and COPY dynamic relocations. */ |
| 2741 | |
| 2742 | return true; |
| 2743 | } |
| 2744 | |
| 2745 | /* Symbol versioning can create new symbols, and make our old symbols |
| 2746 | indirect to the new ones. Consolidate the got and reloc information |
| 2747 | in these situations. */ |
| 2748 | |
| 2749 | static boolean |
| 2750 | elf64_alpha_merge_ind_symbols (hi, dummy) |
| 2751 | struct alpha_elf_link_hash_entry *hi; |
| 2752 | PTR dummy ATTRIBUTE_UNUSED; |
| 2753 | { |
| 2754 | struct alpha_elf_link_hash_entry *hs; |
| 2755 | |
| 2756 | if (hi->root.root.type != bfd_link_hash_indirect) |
| 2757 | return true; |
| 2758 | hs = hi; |
| 2759 | do { |
| 2760 | hs = (struct alpha_elf_link_hash_entry *)hs->root.root.u.i.link; |
| 2761 | } while (hs->root.root.type == bfd_link_hash_indirect); |
| 2762 | |
| 2763 | /* Merge the flags. Whee. */ |
| 2764 | |
| 2765 | hs->flags |= hi->flags; |
| 2766 | |
| 2767 | /* Merge the .got entries. Cannibalize the old symbol's list in |
| 2768 | doing so, since we don't need it anymore. */ |
| 2769 | |
| 2770 | if (hs->got_entries == NULL) |
| 2771 | hs->got_entries = hi->got_entries; |
| 2772 | else |
| 2773 | { |
| 2774 | struct alpha_elf_got_entry *gi, *gs, *gin, *gsh; |
| 2775 | |
| 2776 | gsh = hs->got_entries; |
| 2777 | for (gi = hi->got_entries; gi ; gi = gin) |
| 2778 | { |
| 2779 | gin = gi->next; |
| 2780 | for (gs = gsh; gs ; gs = gs->next) |
| 2781 | if (gi->gotobj == gs->gotobj && gi->addend == gs->addend) |
| 2782 | goto got_found; |
| 2783 | gi->next = hs->got_entries; |
| 2784 | hs->got_entries = gi; |
| 2785 | got_found:; |
| 2786 | } |
| 2787 | } |
| 2788 | hi->got_entries = NULL; |
| 2789 | |
| 2790 | /* And similar for the reloc entries. */ |
| 2791 | |
| 2792 | if (hs->reloc_entries == NULL) |
| 2793 | hs->reloc_entries = hi->reloc_entries; |
| 2794 | else |
| 2795 | { |
| 2796 | struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh; |
| 2797 | |
| 2798 | rsh = hs->reloc_entries; |
| 2799 | for (ri = hi->reloc_entries; ri ; ri = rin) |
| 2800 | { |
| 2801 | rin = ri->next; |
| 2802 | for (rs = rsh; rs ; rs = rs->next) |
| 2803 | if (ri->rtype == rs->rtype) |
| 2804 | { |
| 2805 | rs->count += ri->count; |
| 2806 | goto found_reloc; |
| 2807 | } |
| 2808 | ri->next = hs->reloc_entries; |
| 2809 | hs->reloc_entries = ri; |
| 2810 | found_reloc:; |
| 2811 | } |
| 2812 | } |
| 2813 | hi->reloc_entries = NULL; |
| 2814 | |
| 2815 | return true; |
| 2816 | } |
| 2817 | |
| 2818 | /* Is it possible to merge two object file's .got tables? */ |
| 2819 | |
| 2820 | static boolean |
| 2821 | elf64_alpha_can_merge_gots (a, b) |
| 2822 | bfd *a, *b; |
| 2823 | { |
| 2824 | int total = alpha_elf_tdata (a)->total_got_entries; |
| 2825 | bfd *bsub; |
| 2826 | |
| 2827 | /* Trivial quick fallout test. */ |
| 2828 | if (total + alpha_elf_tdata (b)->total_got_entries <= MAX_GOT_ENTRIES) |
| 2829 | return true; |
| 2830 | |
| 2831 | /* By their nature, local .got entries cannot be merged. */ |
| 2832 | if ((total += alpha_elf_tdata (b)->n_local_got_entries) > MAX_GOT_ENTRIES) |
| 2833 | return false; |
| 2834 | |
| 2835 | /* Failing the common trivial comparison, we must effectively |
| 2836 | perform the merge. Not actually performing the merge means that |
| 2837 | we don't have to store undo information in case we fail. */ |
| 2838 | for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next) |
| 2839 | { |
| 2840 | struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub); |
| 2841 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr; |
| 2842 | int i, n; |
| 2843 | |
| 2844 | n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info; |
| 2845 | for (i = 0; i < n; ++i) |
| 2846 | { |
| 2847 | struct alpha_elf_got_entry *ae, *be; |
| 2848 | struct alpha_elf_link_hash_entry *h; |
| 2849 | |
| 2850 | h = hashes[i]; |
| 2851 | while (h->root.root.type == bfd_link_hash_indirect |
| 2852 | || h->root.root.type == bfd_link_hash_warning) |
| 2853 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; |
| 2854 | |
| 2855 | for (be = h->got_entries; be ; be = be->next) |
| 2856 | { |
| 2857 | if (be->use_count == 0) |
| 2858 | continue; |
| 2859 | if (be->gotobj != b) |
| 2860 | continue; |
| 2861 | |
| 2862 | for (ae = h->got_entries; ae ; ae = ae->next) |
| 2863 | if (ae->gotobj == a && ae->addend == be->addend) |
| 2864 | goto global_found; |
| 2865 | |
| 2866 | if (++total > MAX_GOT_ENTRIES) |
| 2867 | return false; |
| 2868 | global_found:; |
| 2869 | } |
| 2870 | } |
| 2871 | } |
| 2872 | |
| 2873 | return true; |
| 2874 | } |
| 2875 | |
| 2876 | /* Actually merge two .got tables. */ |
| 2877 | |
| 2878 | static void |
| 2879 | elf64_alpha_merge_gots (a, b) |
| 2880 | bfd *a, *b; |
| 2881 | { |
| 2882 | int total = alpha_elf_tdata (a)->total_got_entries; |
| 2883 | bfd *bsub; |
| 2884 | |
| 2885 | /* Remember local expansion. */ |
| 2886 | { |
| 2887 | int e = alpha_elf_tdata (b)->n_local_got_entries; |
| 2888 | total += e; |
| 2889 | alpha_elf_tdata (a)->n_local_got_entries += e; |
| 2890 | } |
| 2891 | |
| 2892 | for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next) |
| 2893 | { |
| 2894 | struct alpha_elf_got_entry **local_got_entries; |
| 2895 | struct alpha_elf_link_hash_entry **hashes; |
| 2896 | Elf_Internal_Shdr *symtab_hdr; |
| 2897 | int i, n; |
| 2898 | |
| 2899 | /* Let the local .got entries know they are part of a new subsegment. */ |
| 2900 | local_got_entries = alpha_elf_tdata (bsub)->local_got_entries; |
| 2901 | if (local_got_entries) |
| 2902 | { |
| 2903 | n = elf_tdata (bsub)->symtab_hdr.sh_info; |
| 2904 | for (i = 0; i < n; ++i) |
| 2905 | { |
| 2906 | struct alpha_elf_got_entry *ent; |
| 2907 | for (ent = local_got_entries[i]; ent; ent = ent->next) |
| 2908 | ent->gotobj = a; |
| 2909 | } |
| 2910 | } |
| 2911 | |
| 2912 | /* Merge the global .got entries. */ |
| 2913 | hashes = alpha_elf_sym_hashes (bsub); |
| 2914 | symtab_hdr = &elf_tdata (bsub)->symtab_hdr; |
| 2915 | |
| 2916 | n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info; |
| 2917 | for (i = 0; i < n; ++i) |
| 2918 | { |
| 2919 | struct alpha_elf_got_entry *ae, *be, **pbe, **start; |
| 2920 | struct alpha_elf_link_hash_entry *h; |
| 2921 | |
| 2922 | h = hashes[i]; |
| 2923 | while (h->root.root.type == bfd_link_hash_indirect |
| 2924 | || h->root.root.type == bfd_link_hash_warning) |
| 2925 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; |
| 2926 | |
| 2927 | start = &h->got_entries; |
| 2928 | for (pbe = start, be = *start; be ; pbe = &be->next, be = be->next) |
| 2929 | { |
| 2930 | if (be->use_count == 0) |
| 2931 | { |
| 2932 | *pbe = be->next; |
| 2933 | continue; |
| 2934 | } |
| 2935 | if (be->gotobj != b) |
| 2936 | continue; |
| 2937 | |
| 2938 | for (ae = *start; ae ; ae = ae->next) |
| 2939 | if (ae->gotobj == a && ae->addend == be->addend) |
| 2940 | { |
| 2941 | ae->flags |= be->flags; |
| 2942 | ae->use_count += be->use_count; |
| 2943 | *pbe = be->next; |
| 2944 | goto global_found; |
| 2945 | } |
| 2946 | be->gotobj = a; |
| 2947 | total += 1; |
| 2948 | |
| 2949 | global_found:; |
| 2950 | } |
| 2951 | } |
| 2952 | |
| 2953 | alpha_elf_tdata (bsub)->gotobj = a; |
| 2954 | } |
| 2955 | alpha_elf_tdata (a)->total_got_entries = total; |
| 2956 | |
| 2957 | /* Merge the two in_got chains. */ |
| 2958 | { |
| 2959 | bfd *next; |
| 2960 | |
| 2961 | bsub = a; |
| 2962 | while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL) |
| 2963 | bsub = next; |
| 2964 | |
| 2965 | alpha_elf_tdata (bsub)->in_got_link_next = b; |
| 2966 | } |
| 2967 | } |
| 2968 | |
| 2969 | /* Calculate the offsets for the got entries. */ |
| 2970 | |
| 2971 | static boolean |
| 2972 | elf64_alpha_calc_got_offsets_for_symbol (h, arg) |
| 2973 | struct alpha_elf_link_hash_entry *h; |
| 2974 | PTR arg ATTRIBUTE_UNUSED; |
| 2975 | { |
| 2976 | struct alpha_elf_got_entry *gotent; |
| 2977 | |
| 2978 | for (gotent = h->got_entries; gotent; gotent = gotent->next) |
| 2979 | if (gotent->use_count > 0) |
| 2980 | { |
| 2981 | bfd_size_type *plge |
| 2982 | = &alpha_elf_tdata (gotent->gotobj)->got->_raw_size; |
| 2983 | |
| 2984 | gotent->got_offset = *plge; |
| 2985 | *plge += 8; |
| 2986 | } |
| 2987 | |
| 2988 | return true; |
| 2989 | } |
| 2990 | |
| 2991 | static void |
| 2992 | elf64_alpha_calc_got_offsets (info) |
| 2993 | struct bfd_link_info *info; |
| 2994 | { |
| 2995 | bfd *i, *got_list = alpha_elf_hash_table(info)->got_list; |
| 2996 | |
| 2997 | /* First, zero out the .got sizes, as we may be recalculating the |
| 2998 | .got after optimizing it. */ |
| 2999 | for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next) |
| 3000 | alpha_elf_tdata(i)->got->_raw_size = 0; |
| 3001 | |
| 3002 | /* Next, fill in the offsets for all the global entries. */ |
| 3003 | alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), |
| 3004 | elf64_alpha_calc_got_offsets_for_symbol, |
| 3005 | NULL); |
| 3006 | |
| 3007 | /* Finally, fill in the offsets for the local entries. */ |
| 3008 | for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next) |
| 3009 | { |
| 3010 | bfd_size_type got_offset = alpha_elf_tdata(i)->got->_raw_size; |
| 3011 | bfd *j; |
| 3012 | |
| 3013 | for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next) |
| 3014 | { |
| 3015 | struct alpha_elf_got_entry **local_got_entries, *gotent; |
| 3016 | int k, n; |
| 3017 | |
| 3018 | local_got_entries = alpha_elf_tdata(j)->local_got_entries; |
| 3019 | if (!local_got_entries) |
| 3020 | continue; |
| 3021 | |
| 3022 | for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k) |
| 3023 | for (gotent = local_got_entries[k]; gotent; gotent = gotent->next) |
| 3024 | if (gotent->use_count > 0) |
| 3025 | { |
| 3026 | gotent->got_offset = got_offset; |
| 3027 | got_offset += 8; |
| 3028 | } |
| 3029 | } |
| 3030 | |
| 3031 | alpha_elf_tdata(i)->got->_raw_size = got_offset; |
| 3032 | alpha_elf_tdata(i)->got->_cooked_size = got_offset; |
| 3033 | } |
| 3034 | } |
| 3035 | |
| 3036 | /* Constructs the gots. */ |
| 3037 | |
| 3038 | static boolean |
| 3039 | elf64_alpha_size_got_sections (output_bfd, info) |
| 3040 | bfd *output_bfd ATTRIBUTE_UNUSED; |
| 3041 | struct bfd_link_info *info; |
| 3042 | { |
| 3043 | bfd *i, *got_list, *cur_got_obj = NULL; |
| 3044 | int something_changed = 0; |
| 3045 | |
| 3046 | got_list = alpha_elf_hash_table (info)->got_list; |
| 3047 | |
| 3048 | /* On the first time through, pretend we have an existing got list |
| 3049 | consisting of all of the input files. */ |
| 3050 | if (got_list == NULL) |
| 3051 | { |
| 3052 | for (i = info->input_bfds; i ; i = i->link_next) |
| 3053 | { |
| 3054 | bfd *this_got = alpha_elf_tdata (i)->gotobj; |
| 3055 | if (this_got == NULL) |
| 3056 | continue; |
| 3057 | |
| 3058 | /* We are assuming no merging has yet ocurred. */ |
| 3059 | BFD_ASSERT (this_got == i); |
| 3060 | |
| 3061 | if (alpha_elf_tdata (this_got)->total_got_entries > MAX_GOT_ENTRIES) |
| 3062 | { |
| 3063 | /* Yikes! A single object file has too many entries. */ |
| 3064 | (*_bfd_error_handler) |
| 3065 | (_("%s: .got subsegment exceeds 64K (size %d)"), |
| 3066 | bfd_get_filename (i), |
| 3067 | alpha_elf_tdata (this_got)->total_got_entries * 8); |
| 3068 | return false; |
| 3069 | } |
| 3070 | |
| 3071 | if (got_list == NULL) |
| 3072 | got_list = this_got; |
| 3073 | else |
| 3074 | alpha_elf_tdata(cur_got_obj)->got_link_next = this_got; |
| 3075 | cur_got_obj = this_got; |
| 3076 | } |
| 3077 | |
| 3078 | /* Strange degenerate case of no got references. */ |
| 3079 | if (got_list == NULL) |
| 3080 | return true; |
| 3081 | |
| 3082 | alpha_elf_hash_table (info)->got_list = got_list; |
| 3083 | |
| 3084 | /* Force got offsets to be recalculated. */ |
| 3085 | something_changed = 1; |
| 3086 | } |
| 3087 | |
| 3088 | cur_got_obj = got_list; |
| 3089 | i = alpha_elf_tdata(cur_got_obj)->got_link_next; |
| 3090 | while (i != NULL) |
| 3091 | { |
| 3092 | if (elf64_alpha_can_merge_gots (cur_got_obj, i)) |
| 3093 | { |
| 3094 | elf64_alpha_merge_gots (cur_got_obj, i); |
| 3095 | i = alpha_elf_tdata(i)->got_link_next; |
| 3096 | alpha_elf_tdata(cur_got_obj)->got_link_next = i; |
| 3097 | something_changed = 1; |
| 3098 | } |
| 3099 | else |
| 3100 | { |
| 3101 | cur_got_obj = i; |
| 3102 | i = alpha_elf_tdata(i)->got_link_next; |
| 3103 | } |
| 3104 | } |
| 3105 | |
| 3106 | /* Once the gots have been merged, fill in the got offsets for |
| 3107 | everything therein. */ |
| 3108 | if (1 || something_changed) |
| 3109 | elf64_alpha_calc_got_offsets (info); |
| 3110 | |
| 3111 | return true; |
| 3112 | } |
| 3113 | |
| 3114 | static boolean |
| 3115 | elf64_alpha_always_size_sections (output_bfd, info) |
| 3116 | bfd *output_bfd; |
| 3117 | struct bfd_link_info *info; |
| 3118 | { |
| 3119 | bfd *i; |
| 3120 | |
| 3121 | if (info->relocateable) |
| 3122 | return true; |
| 3123 | |
| 3124 | /* First, take care of the indirect symbols created by versioning. */ |
| 3125 | alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), |
| 3126 | elf64_alpha_merge_ind_symbols, |
| 3127 | NULL); |
| 3128 | |
| 3129 | if (!elf64_alpha_size_got_sections (output_bfd, info)) |
| 3130 | return false; |
| 3131 | |
| 3132 | /* Allocate space for all of the .got subsections. */ |
| 3133 | i = alpha_elf_hash_table (info)->got_list; |
| 3134 | for ( ; i ; i = alpha_elf_tdata(i)->got_link_next) |
| 3135 | { |
| 3136 | asection *s = alpha_elf_tdata(i)->got; |
| 3137 | if (s->_raw_size > 0) |
| 3138 | { |
| 3139 | s->contents = (bfd_byte *) bfd_zalloc (i, s->_raw_size); |
| 3140 | if (s->contents == NULL) |
| 3141 | return false; |
| 3142 | } |
| 3143 | } |
| 3144 | |
| 3145 | return true; |
| 3146 | } |
| 3147 | |
| 3148 | /* Work out the sizes of the dynamic relocation entries. */ |
| 3149 | |
| 3150 | static boolean |
| 3151 | elf64_alpha_calc_dynrel_sizes (h, info) |
| 3152 | struct alpha_elf_link_hash_entry *h; |
| 3153 | struct bfd_link_info *info; |
| 3154 | { |
| 3155 | /* If the symbol was defined as a common symbol in a regular object |
| 3156 | file, and there was no definition in any dynamic object, then the |
| 3157 | linker will have allocated space for the symbol in a common |
| 3158 | section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been |
| 3159 | set. This is done for dynamic symbols in |
| 3160 | elf_adjust_dynamic_symbol but this is not done for non-dynamic |
| 3161 | symbols, somehow. */ |
| 3162 | if (((h->root.elf_link_hash_flags |
| 3163 | & (ELF_LINK_HASH_DEF_REGULAR |
| 3164 | | ELF_LINK_HASH_REF_REGULAR |
| 3165 | | ELF_LINK_HASH_DEF_DYNAMIC)) |
| 3166 | == ELF_LINK_HASH_REF_REGULAR) |
| 3167 | && (h->root.root.type == bfd_link_hash_defined |
| 3168 | || h->root.root.type == bfd_link_hash_defweak) |
| 3169 | && !(h->root.root.u.def.section->owner->flags & DYNAMIC)) |
| 3170 | { |
| 3171 | h->root.elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
| 3172 | } |
| 3173 | |
| 3174 | /* If the symbol is dynamic, we'll need all the relocations in their |
| 3175 | natural form. If this is a shared object, and it has been forced |
| 3176 | local, we'll need the same number of RELATIVE relocations. */ |
| 3177 | |
| 3178 | if (alpha_elf_dynamic_symbol_p (&h->root, info) || info->shared) |
| 3179 | { |
| 3180 | struct alpha_elf_reloc_entry *relent; |
| 3181 | bfd *dynobj; |
| 3182 | struct alpha_elf_got_entry *gotent; |
| 3183 | bfd_size_type count; |
| 3184 | asection *srel; |
| 3185 | |
| 3186 | for (relent = h->reloc_entries; relent; relent = relent->next) |
| 3187 | if (relent->rtype == R_ALPHA_REFLONG |
| 3188 | || relent->rtype == R_ALPHA_REFQUAD) |
| 3189 | { |
| 3190 | relent->srel->_raw_size += |
| 3191 | sizeof (Elf64_External_Rela) * relent->count; |
| 3192 | if (relent->reltext) |
| 3193 | info->flags |= DT_TEXTREL; |
| 3194 | } |
| 3195 | |
| 3196 | dynobj = elf_hash_table(info)->dynobj; |
| 3197 | count = 0; |
| 3198 | |
| 3199 | for (gotent = h->got_entries; gotent ; gotent = gotent->next) |
| 3200 | count++; |
| 3201 | |
| 3202 | /* If we are using a .plt entry, subtract one, as the first |
| 3203 | reference uses a .rela.plt entry instead. */ |
| 3204 | if (h->root.plt.offset != MINUS_ONE) |
| 3205 | count--; |
| 3206 | |
| 3207 | if (count > 0) |
| 3208 | { |
| 3209 | srel = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 3210 | BFD_ASSERT (srel != NULL); |
| 3211 | srel->_raw_size += sizeof (Elf64_External_Rela) * count; |
| 3212 | } |
| 3213 | } |
| 3214 | |
| 3215 | return true; |
| 3216 | } |
| 3217 | |
| 3218 | /* Set the sizes of the dynamic sections. */ |
| 3219 | |
| 3220 | static boolean |
| 3221 | elf64_alpha_size_dynamic_sections (output_bfd, info) |
| 3222 | bfd *output_bfd; |
| 3223 | struct bfd_link_info *info; |
| 3224 | { |
| 3225 | bfd *dynobj; |
| 3226 | asection *s; |
| 3227 | boolean relplt; |
| 3228 | |
| 3229 | dynobj = elf_hash_table(info)->dynobj; |
| 3230 | BFD_ASSERT(dynobj != NULL); |
| 3231 | |
| 3232 | if (elf_hash_table (info)->dynamic_sections_created) |
| 3233 | { |
| 3234 | /* Set the contents of the .interp section to the interpreter. */ |
| 3235 | if (!info->shared) |
| 3236 | { |
| 3237 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 3238 | BFD_ASSERT (s != NULL); |
| 3239 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 3240 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 3241 | } |
| 3242 | |
| 3243 | /* Now that we've seen all of the input files, we can decide which |
| 3244 | symbols need dynamic relocation entries and which don't. We've |
| 3245 | collected information in check_relocs that we can now apply to |
| 3246 | size the dynamic relocation sections. */ |
| 3247 | alpha_elf_link_hash_traverse (alpha_elf_hash_table (info), |
| 3248 | elf64_alpha_calc_dynrel_sizes, |
| 3249 | info); |
| 3250 | |
| 3251 | /* When building shared libraries, each local .got entry needs a |
| 3252 | RELATIVE reloc. */ |
| 3253 | if (info->shared) |
| 3254 | { |
| 3255 | bfd *i; |
| 3256 | asection *srel; |
| 3257 | bfd_size_type count; |
| 3258 | |
| 3259 | srel = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 3260 | BFD_ASSERT (srel != NULL); |
| 3261 | |
| 3262 | for (i = alpha_elf_hash_table(info)->got_list, count = 0; |
| 3263 | i != NULL; |
| 3264 | i = alpha_elf_tdata(i)->got_link_next) |
| 3265 | count += alpha_elf_tdata(i)->n_local_got_entries; |
| 3266 | |
| 3267 | srel->_raw_size += count * sizeof (Elf64_External_Rela); |
| 3268 | } |
| 3269 | } |
| 3270 | /* else we're not dynamic and by definition we don't need such things. */ |
| 3271 | |
| 3272 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 3273 | determined the sizes of the various dynamic sections. Allocate |
| 3274 | memory for them. */ |
| 3275 | relplt = false; |
| 3276 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 3277 | { |
| 3278 | const char *name; |
| 3279 | boolean strip; |
| 3280 | |
| 3281 | if (!(s->flags & SEC_LINKER_CREATED)) |
| 3282 | continue; |
| 3283 | |
| 3284 | /* It's OK to base decisions on the section name, because none |
| 3285 | of the dynobj section names depend upon the input files. */ |
| 3286 | name = bfd_get_section_name (dynobj, s); |
| 3287 | |
| 3288 | /* If we don't need this section, strip it from the output file. |
| 3289 | This is to handle .rela.bss and .rela.plt. We must create it |
| 3290 | in create_dynamic_sections, because it must be created before |
| 3291 | the linker maps input sections to output sections. The |
| 3292 | linker does that before adjust_dynamic_symbol is called, and |
| 3293 | it is that function which decides whether anything needs to |
| 3294 | go into these sections. */ |
| 3295 | |
| 3296 | strip = false; |
| 3297 | |
| 3298 | if (strncmp (name, ".rela", 5) == 0) |
| 3299 | { |
| 3300 | strip = (s->_raw_size == 0); |
| 3301 | |
| 3302 | if (!strip) |
| 3303 | { |
| 3304 | if (strcmp(name, ".rela.plt") == 0) |
| 3305 | relplt = true; |
| 3306 | |
| 3307 | /* We use the reloc_count field as a counter if we need |
| 3308 | to copy relocs into the output file. */ |
| 3309 | s->reloc_count = 0; |
| 3310 | } |
| 3311 | } |
| 3312 | else if (strcmp (name, ".plt") != 0) |
| 3313 | { |
| 3314 | /* It's not one of our dynamic sections, so don't allocate space. */ |
| 3315 | continue; |
| 3316 | } |
| 3317 | |
| 3318 | if (strip) |
| 3319 | _bfd_strip_section_from_output (info, s); |
| 3320 | else |
| 3321 | { |
| 3322 | /* Allocate memory for the section contents. */ |
| 3323 | s->contents = (bfd_byte *) bfd_zalloc(dynobj, s->_raw_size); |
| 3324 | if (s->contents == NULL && s->_raw_size != 0) |
| 3325 | return false; |
| 3326 | } |
| 3327 | } |
| 3328 | |
| 3329 | if (elf_hash_table (info)->dynamic_sections_created) |
| 3330 | { |
| 3331 | /* Add some entries to the .dynamic section. We fill in the |
| 3332 | values later, in elf64_alpha_finish_dynamic_sections, but we |
| 3333 | must add the entries now so that we get the correct size for |
| 3334 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 3335 | dynamic linker and used by the debugger. */ |
| 3336 | if (!info->shared) |
| 3337 | { |
| 3338 | if (!bfd_elf64_add_dynamic_entry (info, DT_DEBUG, 0)) |
| 3339 | return false; |
| 3340 | } |
| 3341 | |
| 3342 | if (! bfd_elf64_add_dynamic_entry (info, DT_PLTGOT, 0)) |
| 3343 | return false; |
| 3344 | |
| 3345 | if (relplt) |
| 3346 | { |
| 3347 | if (! bfd_elf64_add_dynamic_entry (info, DT_PLTRELSZ, 0) |
| 3348 | || ! bfd_elf64_add_dynamic_entry (info, DT_PLTREL, DT_RELA) |
| 3349 | || ! bfd_elf64_add_dynamic_entry (info, DT_JMPREL, 0)) |
| 3350 | return false; |
| 3351 | } |
| 3352 | |
| 3353 | if (! bfd_elf64_add_dynamic_entry (info, DT_RELA, 0) |
| 3354 | || ! bfd_elf64_add_dynamic_entry (info, DT_RELASZ, 0) |
| 3355 | || ! bfd_elf64_add_dynamic_entry (info, DT_RELAENT, |
| 3356 | sizeof (Elf64_External_Rela))) |
| 3357 | return false; |
| 3358 | |
| 3359 | if (info->flags & DF_TEXTREL) |
| 3360 | { |
| 3361 | if (! bfd_elf64_add_dynamic_entry (info, DT_TEXTREL, 0)) |
| 3362 | return false; |
| 3363 | } |
| 3364 | } |
| 3365 | |
| 3366 | return true; |
| 3367 | } |
| 3368 | |
| 3369 | /* Relocate an Alpha ELF section. */ |
| 3370 | |
| 3371 | static boolean |
| 3372 | elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section, |
| 3373 | contents, relocs, local_syms, local_sections) |
| 3374 | bfd *output_bfd; |
| 3375 | struct bfd_link_info *info; |
| 3376 | bfd *input_bfd; |
| 3377 | asection *input_section; |
| 3378 | bfd_byte *contents; |
| 3379 | Elf_Internal_Rela *relocs; |
| 3380 | Elf_Internal_Sym *local_syms; |
| 3381 | asection **local_sections; |
| 3382 | { |
| 3383 | Elf_Internal_Shdr *symtab_hdr; |
| 3384 | Elf_Internal_Rela *rel; |
| 3385 | Elf_Internal_Rela *relend; |
| 3386 | asection *sec, *sgot, *srel, *srelgot; |
| 3387 | bfd *dynobj, *gotobj; |
| 3388 | bfd_vma gp; |
| 3389 | |
| 3390 | srelgot = srel = NULL; |
| 3391 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 3392 | dynobj = elf_hash_table (info)->dynobj; |
| 3393 | if (dynobj) |
| 3394 | { |
| 3395 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 3396 | } |
| 3397 | |
| 3398 | /* Find the gp value for this input bfd. */ |
| 3399 | sgot = NULL; |
| 3400 | gp = 0; |
| 3401 | gotobj = alpha_elf_tdata (input_bfd)->gotobj; |
| 3402 | if (gotobj) |
| 3403 | { |
| 3404 | sgot = alpha_elf_tdata (gotobj)->got; |
| 3405 | gp = _bfd_get_gp_value (gotobj); |
| 3406 | if (gp == 0) |
| 3407 | { |
| 3408 | gp = (sgot->output_section->vma |
| 3409 | + sgot->output_offset |
| 3410 | + 0x8000); |
| 3411 | _bfd_set_gp_value (gotobj, gp); |
| 3412 | } |
| 3413 | } |
| 3414 | |
| 3415 | rel = relocs; |
| 3416 | relend = relocs + input_section->reloc_count; |
| 3417 | for (; rel < relend; rel++) |
| 3418 | { |
| 3419 | int r_type; |
| 3420 | reloc_howto_type *howto; |
| 3421 | unsigned long r_symndx; |
| 3422 | struct alpha_elf_link_hash_entry *h; |
| 3423 | Elf_Internal_Sym *sym; |
| 3424 | bfd_vma relocation; |
| 3425 | bfd_signed_vma addend; |
| 3426 | bfd_reloc_status_type r; |
| 3427 | |
| 3428 | r_type = ELF64_R_TYPE(rel->r_info); |
| 3429 | if (r_type < 0 || r_type >= (int) R_ALPHA_max) |
| 3430 | { |
| 3431 | bfd_set_error (bfd_error_bad_value); |
| 3432 | return false; |
| 3433 | } |
| 3434 | howto = elf64_alpha_howto_table + r_type; |
| 3435 | |
| 3436 | r_symndx = ELF64_R_SYM(rel->r_info); |
| 3437 | |
| 3438 | if (info->relocateable) |
| 3439 | { |
| 3440 | /* This is a relocateable link. We don't have to change |
| 3441 | anything, unless the reloc is against a section symbol, |
| 3442 | in which case we have to adjust according to where the |
| 3443 | section symbol winds up in the output section. */ |
| 3444 | |
| 3445 | /* The symbol associated with GPDISP and LITUSE is |
| 3446 | immaterial. Only the addend is significant. */ |
| 3447 | if (r_type == R_ALPHA_GPDISP || r_type == R_ALPHA_LITUSE) |
| 3448 | continue; |
| 3449 | |
| 3450 | if (r_symndx < symtab_hdr->sh_info) |
| 3451 | { |
| 3452 | sym = local_syms + r_symndx; |
| 3453 | if (ELF_ST_TYPE(sym->st_info) == STT_SECTION) |
| 3454 | { |
| 3455 | sec = local_sections[r_symndx]; |
| 3456 | rel->r_addend += sec->output_offset + sym->st_value; |
| 3457 | } |
| 3458 | } |
| 3459 | |
| 3460 | continue; |
| 3461 | } |
| 3462 | |
| 3463 | /* This is a final link. */ |
| 3464 | |
| 3465 | h = NULL; |
| 3466 | sym = NULL; |
| 3467 | sec = NULL; |
| 3468 | |
| 3469 | if (r_symndx < symtab_hdr->sh_info) |
| 3470 | { |
| 3471 | sym = local_syms + r_symndx; |
| 3472 | sec = local_sections[r_symndx]; |
| 3473 | relocation = (sec->output_section->vma |
| 3474 | + sec->output_offset |
| 3475 | + sym->st_value); |
| 3476 | } |
| 3477 | else |
| 3478 | { |
| 3479 | h = alpha_elf_sym_hashes (input_bfd)[r_symndx - symtab_hdr->sh_info]; |
| 3480 | |
| 3481 | while (h->root.root.type == bfd_link_hash_indirect |
| 3482 | || h->root.root.type == bfd_link_hash_warning) |
| 3483 | h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; |
| 3484 | |
| 3485 | if (h->root.root.type == bfd_link_hash_defined |
| 3486 | || h->root.root.type == bfd_link_hash_defweak) |
| 3487 | { |
| 3488 | sec = h->root.root.u.def.section; |
| 3489 | |
| 3490 | #if rth_notdef |
| 3491 | if ((r_type == R_ALPHA_LITERAL |
| 3492 | && elf_hash_table(info)->dynamic_sections_created |
| 3493 | && (!info->shared |
| 3494 | || !info->symbolic |
| 3495 | || !(h->root.elf_link_hash_flags |
| 3496 | & ELF_LINK_HASH_DEF_REGULAR))) |
| 3497 | || (info->shared |
| 3498 | && (!info->symbolic |
| 3499 | || !(h->root.elf_link_hash_flags |
| 3500 | & ELF_LINK_HASH_DEF_REGULAR)) |
| 3501 | && (input_section->flags & SEC_ALLOC) |
| 3502 | && (r_type == R_ALPHA_REFLONG |
| 3503 | || r_type == R_ALPHA_REFQUAD |
| 3504 | || r_type == R_ALPHA_LITERAL))) |
| 3505 | { |
| 3506 | /* In these cases, we don't need the relocation value. |
| 3507 | We check specially because in some obscure cases |
| 3508 | sec->output_section will be NULL. */ |
| 3509 | relocation = 0; |
| 3510 | } |
| 3511 | #else |
| 3512 | /* FIXME: Are not these obscure cases simply bugs? Let's |
| 3513 | get something working and come back to this. */ |
| 3514 | if (sec->output_section == NULL) |
| 3515 | relocation = 0; |
| 3516 | #endif /* rth_notdef */ |
| 3517 | else |
| 3518 | { |
| 3519 | relocation = (h->root.root.u.def.value |
| 3520 | + sec->output_section->vma |
| 3521 | + sec->output_offset); |
| 3522 | } |
| 3523 | } |
| 3524 | else if (h->root.root.type == bfd_link_hash_undefweak) |
| 3525 | relocation = 0; |
| 3526 | else if (info->shared && !info->symbolic |
| 3527 | && !info->no_undefined |
| 3528 | && ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT) |
| 3529 | relocation = 0; |
| 3530 | else |
| 3531 | { |
| 3532 | if (!((*info->callbacks->undefined_symbol) |
| 3533 | (info, h->root.root.root.string, input_bfd, |
| 3534 | input_section, rel->r_offset, |
| 3535 | (!info->shared || info->no_undefined |
| 3536 | || ELF_ST_VISIBILITY (h->root.other))))) |
| 3537 | return false; |
| 3538 | relocation = 0; |
| 3539 | } |
| 3540 | } |
| 3541 | addend = rel->r_addend; |
| 3542 | |
| 3543 | switch (r_type) |
| 3544 | { |
| 3545 | case R_ALPHA_GPDISP: |
| 3546 | { |
| 3547 | bfd_byte *p_ldah, *p_lda; |
| 3548 | |
| 3549 | BFD_ASSERT(gp != 0); |
| 3550 | |
| 3551 | relocation = (input_section->output_section->vma |
| 3552 | + input_section->output_offset |
| 3553 | + rel->r_offset); |
| 3554 | |
| 3555 | p_ldah = contents + rel->r_offset - input_section->vma; |
| 3556 | p_lda = p_ldah + rel->r_addend; |
| 3557 | |
| 3558 | r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - relocation, |
| 3559 | p_ldah, p_lda); |
| 3560 | } |
| 3561 | break; |
| 3562 | |
| 3563 | case R_ALPHA_OP_PUSH: |
| 3564 | case R_ALPHA_OP_STORE: |
| 3565 | case R_ALPHA_OP_PSUB: |
| 3566 | case R_ALPHA_OP_PRSHIFT: |
| 3567 | /* We hate these silly beasts. */ |
| 3568 | abort (); |
| 3569 | |
| 3570 | case R_ALPHA_LITERAL: |
| 3571 | { |
| 3572 | struct alpha_elf_got_entry *gotent; |
| 3573 | boolean dynamic_symbol; |
| 3574 | |
| 3575 | BFD_ASSERT(sgot != NULL); |
| 3576 | BFD_ASSERT(gp != 0); |
| 3577 | |
| 3578 | if (h != NULL) |
| 3579 | { |
| 3580 | gotent = h->got_entries; |
| 3581 | dynamic_symbol = alpha_elf_dynamic_symbol_p (&h->root, info); |
| 3582 | } |
| 3583 | else |
| 3584 | { |
| 3585 | gotent = (alpha_elf_tdata(input_bfd)-> |
| 3586 | local_got_entries[r_symndx]); |
| 3587 | dynamic_symbol = false; |
| 3588 | } |
| 3589 | |
| 3590 | BFD_ASSERT(gotent != NULL); |
| 3591 | |
| 3592 | while (gotent->gotobj != gotobj || gotent->addend != addend) |
| 3593 | gotent = gotent->next; |
| 3594 | |
| 3595 | BFD_ASSERT(gotent->use_count >= 1); |
| 3596 | |
| 3597 | /* Initialize the .got entry's value. */ |
| 3598 | if (!(gotent->flags & ALPHA_ELF_GOT_ENTRY_RELOCS_DONE)) |
| 3599 | { |
| 3600 | bfd_put_64 (output_bfd, relocation+addend, |
| 3601 | sgot->contents + gotent->got_offset); |
| 3602 | |
| 3603 | /* If the symbol has been forced local, output a |
| 3604 | RELATIVE reloc, otherwise it will be handled in |
| 3605 | finish_dynamic_symbol. */ |
| 3606 | if (info->shared && !dynamic_symbol) |
| 3607 | { |
| 3608 | Elf_Internal_Rela outrel; |
| 3609 | |
| 3610 | BFD_ASSERT(srelgot != NULL); |
| 3611 | |
| 3612 | outrel.r_offset = (sgot->output_section->vma |
| 3613 | + sgot->output_offset |
| 3614 | + gotent->got_offset); |
| 3615 | outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE); |
| 3616 | outrel.r_addend = 0; |
| 3617 | |
| 3618 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, |
| 3619 | ((Elf64_External_Rela *) |
| 3620 | srelgot->contents) |
| 3621 | + srelgot->reloc_count++); |
| 3622 | BFD_ASSERT (sizeof (Elf64_External_Rela) |
| 3623 | * srelgot->reloc_count |
| 3624 | <= srelgot->_cooked_size); |
| 3625 | } |
| 3626 | |
| 3627 | gotent->flags |= ALPHA_ELF_GOT_ENTRY_RELOCS_DONE; |
| 3628 | } |
| 3629 | |
| 3630 | /* Figure the gprel relocation. */ |
| 3631 | addend = 0; |
| 3632 | relocation = (sgot->output_section->vma |
| 3633 | + sgot->output_offset |
| 3634 | + gotent->got_offset); |
| 3635 | relocation -= gp; |
| 3636 | } |
| 3637 | /* overflow handled by _bfd_final_link_relocate */ |
| 3638 | goto default_reloc; |
| 3639 | |
| 3640 | case R_ALPHA_GPREL32: |
| 3641 | case R_ALPHA_GPRELLOW: |
| 3642 | BFD_ASSERT(gp != 0); |
| 3643 | relocation -= gp; |
| 3644 | goto default_reloc; |
| 3645 | |
| 3646 | case R_ALPHA_GPRELHIGH: |
| 3647 | BFD_ASSERT(gp != 0); |
| 3648 | relocation -= gp; |
| 3649 | relocation += addend; |
| 3650 | addend = 0; |
| 3651 | relocation = (((bfd_signed_vma) relocation >> 16) |
| 3652 | + ((relocation >> 15) & 1)); |
| 3653 | goto default_reloc; |
| 3654 | |
| 3655 | case R_ALPHA_BRADDR: |
| 3656 | case R_ALPHA_HINT: |
| 3657 | /* The regular PC-relative stuff measures from the start of |
| 3658 | the instruction rather than the end. */ |
| 3659 | addend -= 4; |
| 3660 | goto default_reloc; |
| 3661 | |
| 3662 | case R_ALPHA_REFLONG: |
| 3663 | case R_ALPHA_REFQUAD: |
| 3664 | { |
| 3665 | Elf_Internal_Rela outrel; |
| 3666 | boolean skip; |
| 3667 | |
| 3668 | /* Careful here to remember RELATIVE relocations for global |
| 3669 | variables for symbolic shared objects. */ |
| 3670 | |
| 3671 | if (h && alpha_elf_dynamic_symbol_p (&h->root, info)) |
| 3672 | { |
| 3673 | BFD_ASSERT(h->root.dynindx != -1); |
| 3674 | outrel.r_info = ELF64_R_INFO(h->root.dynindx, r_type); |
| 3675 | outrel.r_addend = addend; |
| 3676 | addend = 0, relocation = 0; |
| 3677 | } |
| 3678 | else if (info->shared && (input_section->flags & SEC_ALLOC)) |
| 3679 | { |
| 3680 | outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE); |
| 3681 | outrel.r_addend = 0; |
| 3682 | } |
| 3683 | else |
| 3684 | goto default_reloc; |
| 3685 | |
| 3686 | if (!srel) |
| 3687 | { |
| 3688 | const char *name; |
| 3689 | |
| 3690 | name = (bfd_elf_string_from_elf_section |
| 3691 | (input_bfd, elf_elfheader(input_bfd)->e_shstrndx, |
| 3692 | elf_section_data(input_section)->rel_hdr.sh_name)); |
| 3693 | BFD_ASSERT(name != NULL); |
| 3694 | |
| 3695 | srel = bfd_get_section_by_name (dynobj, name); |
| 3696 | BFD_ASSERT(srel != NULL); |
| 3697 | } |
| 3698 | |
| 3699 | skip = false; |
| 3700 | |
| 3701 | if (elf_section_data (input_section)->stab_info == NULL) |
| 3702 | outrel.r_offset = rel->r_offset; |
| 3703 | else |
| 3704 | { |
| 3705 | bfd_vma off; |
| 3706 | |
| 3707 | off = (_bfd_stab_section_offset |
| 3708 | (output_bfd, &elf_hash_table (info)->stab_info, |
| 3709 | input_section, |
| 3710 | &elf_section_data (input_section)->stab_info, |
| 3711 | rel->r_offset)); |
| 3712 | if (off == (bfd_vma) -1) |
| 3713 | skip = true; |
| 3714 | outrel.r_offset = off; |
| 3715 | } |
| 3716 | |
| 3717 | if (! skip) |
| 3718 | outrel.r_offset += (input_section->output_section->vma |
| 3719 | + input_section->output_offset); |
| 3720 | else |
| 3721 | memset (&outrel, 0, sizeof outrel); |
| 3722 | |
| 3723 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, |
| 3724 | ((Elf64_External_Rela *) |
| 3725 | srel->contents) |
| 3726 | + srel->reloc_count++); |
| 3727 | BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count |
| 3728 | <= srel->_cooked_size); |
| 3729 | } |
| 3730 | goto default_reloc; |
| 3731 | |
| 3732 | default: |
| 3733 | default_reloc: |
| 3734 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3735 | contents, rel->r_offset, relocation, |
| 3736 | addend); |
| 3737 | break; |
| 3738 | } |
| 3739 | |
| 3740 | switch (r) |
| 3741 | { |
| 3742 | case bfd_reloc_ok: |
| 3743 | break; |
| 3744 | |
| 3745 | case bfd_reloc_overflow: |
| 3746 | { |
| 3747 | const char *name; |
| 3748 | |
| 3749 | if (h != NULL) |
| 3750 | name = h->root.root.root.string; |
| 3751 | else |
| 3752 | { |
| 3753 | name = (bfd_elf_string_from_elf_section |
| 3754 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 3755 | if (name == NULL) |
| 3756 | return false; |
| 3757 | if (*name == '\0') |
| 3758 | name = bfd_section_name (input_bfd, sec); |
| 3759 | } |
| 3760 | if (! ((*info->callbacks->reloc_overflow) |
| 3761 | (info, name, howto->name, (bfd_vma) 0, |
| 3762 | input_bfd, input_section, rel->r_offset))) |
| 3763 | return false; |
| 3764 | } |
| 3765 | break; |
| 3766 | |
| 3767 | default: |
| 3768 | case bfd_reloc_outofrange: |
| 3769 | abort (); |
| 3770 | } |
| 3771 | } |
| 3772 | |
| 3773 | return true; |
| 3774 | } |
| 3775 | |
| 3776 | /* Finish up dynamic symbol handling. We set the contents of various |
| 3777 | dynamic sections here. */ |
| 3778 | |
| 3779 | static boolean |
| 3780 | elf64_alpha_finish_dynamic_symbol (output_bfd, info, h, sym) |
| 3781 | bfd *output_bfd; |
| 3782 | struct bfd_link_info *info; |
| 3783 | struct elf_link_hash_entry *h; |
| 3784 | Elf_Internal_Sym *sym; |
| 3785 | { |
| 3786 | bfd *dynobj = elf_hash_table(info)->dynobj; |
| 3787 | |
| 3788 | if (h->plt.offset != MINUS_ONE) |
| 3789 | { |
| 3790 | /* Fill in the .plt entry for this symbol. */ |
| 3791 | asection *splt, *sgot, *srel; |
| 3792 | Elf_Internal_Rela outrel; |
| 3793 | bfd_vma got_addr, plt_addr; |
| 3794 | bfd_vma plt_index; |
| 3795 | struct alpha_elf_got_entry *gotent; |
| 3796 | |
| 3797 | BFD_ASSERT (h->dynindx != -1); |
| 3798 | |
| 3799 | /* The first .got entry will be updated by the .plt with the |
| 3800 | address of the target function. */ |
| 3801 | gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries; |
| 3802 | BFD_ASSERT (gotent && gotent->addend == 0); |
| 3803 | |
| 3804 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 3805 | BFD_ASSERT (splt != NULL); |
| 3806 | srel = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 3807 | BFD_ASSERT (srel != NULL); |
| 3808 | sgot = alpha_elf_tdata (gotent->gotobj)->got; |
| 3809 | BFD_ASSERT (sgot != NULL); |
| 3810 | |
| 3811 | got_addr = (sgot->output_section->vma |
| 3812 | + sgot->output_offset |
| 3813 | + gotent->got_offset); |
| 3814 | plt_addr = (splt->output_section->vma |
| 3815 | + splt->output_offset |
| 3816 | + h->plt.offset); |
| 3817 | |
| 3818 | plt_index = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; |
| 3819 | |
| 3820 | /* Fill in the entry in the procedure linkage table. */ |
| 3821 | { |
| 3822 | unsigned insn1, insn2, insn3; |
| 3823 | |
| 3824 | insn1 = PLT_ENTRY_WORD1 | ((-(h->plt.offset + 4) >> 2) & 0x1fffff); |
| 3825 | insn2 = PLT_ENTRY_WORD2; |
| 3826 | insn3 = PLT_ENTRY_WORD3; |
| 3827 | |
| 3828 | bfd_put_32 (output_bfd, insn1, splt->contents + h->plt.offset); |
| 3829 | bfd_put_32 (output_bfd, insn2, splt->contents + h->plt.offset + 4); |
| 3830 | bfd_put_32 (output_bfd, insn3, splt->contents + h->plt.offset + 8); |
| 3831 | } |
| 3832 | |
| 3833 | /* Fill in the entry in the .rela.plt section. */ |
| 3834 | outrel.r_offset = got_addr; |
| 3835 | outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT); |
| 3836 | outrel.r_addend = 0; |
| 3837 | |
| 3838 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, |
| 3839 | ((Elf64_External_Rela *)srel->contents |
| 3840 | + plt_index)); |
| 3841 | |
| 3842 | if (!(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
| 3843 | { |
| 3844 | /* Mark the symbol as undefined, rather than as defined in the |
| 3845 | .plt section. Leave the value alone. */ |
| 3846 | sym->st_shndx = SHN_UNDEF; |
| 3847 | } |
| 3848 | |
| 3849 | /* Fill in the entries in the .got. */ |
| 3850 | bfd_put_64 (output_bfd, plt_addr, sgot->contents + gotent->got_offset); |
| 3851 | |
| 3852 | /* Subsequent .got entries will continue to bounce through the .plt. */ |
| 3853 | if (gotent->next) |
| 3854 | { |
| 3855 | srel = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 3856 | BFD_ASSERT (! info->shared || srel != NULL); |
| 3857 | |
| 3858 | gotent = gotent->next; |
| 3859 | do |
| 3860 | { |
| 3861 | sgot = alpha_elf_tdata(gotent->gotobj)->got; |
| 3862 | BFD_ASSERT(sgot != NULL); |
| 3863 | BFD_ASSERT(gotent->addend == 0); |
| 3864 | |
| 3865 | bfd_put_64 (output_bfd, plt_addr, |
| 3866 | sgot->contents + gotent->got_offset); |
| 3867 | |
| 3868 | if (info->shared) |
| 3869 | { |
| 3870 | outrel.r_offset = (sgot->output_section->vma |
| 3871 | + sgot->output_offset |
| 3872 | + gotent->got_offset); |
| 3873 | outrel.r_info = ELF64_R_INFO(0, R_ALPHA_RELATIVE); |
| 3874 | outrel.r_addend = 0; |
| 3875 | |
| 3876 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, |
| 3877 | ((Elf64_External_Rela *) |
| 3878 | srel->contents) |
| 3879 | + srel->reloc_count++); |
| 3880 | BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count |
| 3881 | <= srel->_cooked_size); |
| 3882 | } |
| 3883 | |
| 3884 | gotent = gotent->next; |
| 3885 | } |
| 3886 | while (gotent != NULL); |
| 3887 | } |
| 3888 | } |
| 3889 | else if (alpha_elf_dynamic_symbol_p (h, info)) |
| 3890 | { |
| 3891 | /* Fill in the dynamic relocations for this symbol's .got entries. */ |
| 3892 | asection *srel; |
| 3893 | Elf_Internal_Rela outrel; |
| 3894 | struct alpha_elf_got_entry *gotent; |
| 3895 | |
| 3896 | srel = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 3897 | BFD_ASSERT (srel != NULL); |
| 3898 | |
| 3899 | outrel.r_info = ELF64_R_INFO (h->dynindx, R_ALPHA_GLOB_DAT); |
| 3900 | for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries; |
| 3901 | gotent != NULL; |
| 3902 | gotent = gotent->next) |
| 3903 | { |
| 3904 | asection *sgot = alpha_elf_tdata (gotent->gotobj)->got; |
| 3905 | outrel.r_offset = (sgot->output_section->vma |
| 3906 | + sgot->output_offset |
| 3907 | + gotent->got_offset); |
| 3908 | outrel.r_addend = gotent->addend; |
| 3909 | |
| 3910 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, |
| 3911 | ((Elf64_External_Rela *)srel->contents |
| 3912 | + srel->reloc_count++)); |
| 3913 | BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count |
| 3914 | <= srel->_cooked_size); |
| 3915 | } |
| 3916 | } |
| 3917 | |
| 3918 | /* Mark some specially defined symbols as absolute. */ |
| 3919 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 3920 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 |
| 3921 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) |
| 3922 | sym->st_shndx = SHN_ABS; |
| 3923 | |
| 3924 | return true; |
| 3925 | } |
| 3926 | |
| 3927 | /* Finish up the dynamic sections. */ |
| 3928 | |
| 3929 | static boolean |
| 3930 | elf64_alpha_finish_dynamic_sections (output_bfd, info) |
| 3931 | bfd *output_bfd; |
| 3932 | struct bfd_link_info *info; |
| 3933 | { |
| 3934 | bfd *dynobj; |
| 3935 | asection *sdyn; |
| 3936 | |
| 3937 | dynobj = elf_hash_table (info)->dynobj; |
| 3938 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 3939 | |
| 3940 | if (elf_hash_table (info)->dynamic_sections_created) |
| 3941 | { |
| 3942 | asection *splt; |
| 3943 | Elf64_External_Dyn *dyncon, *dynconend; |
| 3944 | |
| 3945 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 3946 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
| 3947 | |
| 3948 | dyncon = (Elf64_External_Dyn *) sdyn->contents; |
| 3949 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| 3950 | for (; dyncon < dynconend; dyncon++) |
| 3951 | { |
| 3952 | Elf_Internal_Dyn dyn; |
| 3953 | const char *name; |
| 3954 | asection *s; |
| 3955 | |
| 3956 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
| 3957 | |
| 3958 | switch (dyn.d_tag) |
| 3959 | { |
| 3960 | case DT_PLTGOT: |
| 3961 | name = ".plt"; |
| 3962 | goto get_vma; |
| 3963 | case DT_PLTRELSZ: |
| 3964 | name = ".rela.plt"; |
| 3965 | goto get_size; |
| 3966 | case DT_JMPREL: |
| 3967 | name = ".rela.plt"; |
| 3968 | goto get_vma; |
| 3969 | |
| 3970 | case DT_RELASZ: |
| 3971 | /* My interpretation of the TIS v1.1 ELF document indicates |
| 3972 | that RELASZ should not include JMPREL. This is not what |
| 3973 | the rest of the BFD does. It is, however, what the |
| 3974 | glibc ld.so wants. Do this fixup here until we found |
| 3975 | out who is right. */ |
| 3976 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); |
| 3977 | if (s) |
| 3978 | { |
| 3979 | dyn.d_un.d_val -= |
| 3980 | (s->_cooked_size ? s->_cooked_size : s->_raw_size); |
| 3981 | } |
| 3982 | break; |
| 3983 | |
| 3984 | get_vma: |
| 3985 | s = bfd_get_section_by_name (output_bfd, name); |
| 3986 | dyn.d_un.d_ptr = (s ? s->vma : 0); |
| 3987 | break; |
| 3988 | |
| 3989 | get_size: |
| 3990 | s = bfd_get_section_by_name (output_bfd, name); |
| 3991 | dyn.d_un.d_val = |
| 3992 | (s->_cooked_size ? s->_cooked_size : s->_raw_size); |
| 3993 | break; |
| 3994 | } |
| 3995 | |
| 3996 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 3997 | } |
| 3998 | |
| 3999 | /* Initialize the PLT0 entry */ |
| 4000 | if (splt->_raw_size > 0) |
| 4001 | { |
| 4002 | bfd_put_32 (output_bfd, PLT_HEADER_WORD1, splt->contents); |
| 4003 | bfd_put_32 (output_bfd, PLT_HEADER_WORD2, splt->contents + 4); |
| 4004 | bfd_put_32 (output_bfd, PLT_HEADER_WORD3, splt->contents + 8); |
| 4005 | bfd_put_32 (output_bfd, PLT_HEADER_WORD4, splt->contents + 12); |
| 4006 | |
| 4007 | /* The next two words will be filled in by ld.so */ |
| 4008 | bfd_put_64 (output_bfd, 0, splt->contents + 16); |
| 4009 | bfd_put_64 (output_bfd, 0, splt->contents + 24); |
| 4010 | |
| 4011 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = |
| 4012 | PLT_HEADER_SIZE; |
| 4013 | } |
| 4014 | } |
| 4015 | |
| 4016 | return true; |
| 4017 | } |
| 4018 | |
| 4019 | /* We need to use a special link routine to handle the .reginfo and |
| 4020 | the .mdebug sections. We need to merge all instances of these |
| 4021 | sections together, not write them all out sequentially. */ |
| 4022 | |
| 4023 | static boolean |
| 4024 | elf64_alpha_final_link (abfd, info) |
| 4025 | bfd *abfd; |
| 4026 | struct bfd_link_info *info; |
| 4027 | { |
| 4028 | asection *o; |
| 4029 | struct bfd_link_order *p; |
| 4030 | asection *reginfo_sec, *mdebug_sec, *gptab_data_sec, *gptab_bss_sec; |
| 4031 | struct ecoff_debug_info debug; |
| 4032 | const struct ecoff_debug_swap *swap |
| 4033 | = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; |
| 4034 | HDRR *symhdr = &debug.symbolic_header; |
| 4035 | PTR mdebug_handle = NULL; |
| 4036 | |
| 4037 | #if 0 |
| 4038 | if (++ngots == 2) |
| 4039 | { |
| 4040 | (*info->callbacks->warning) |
| 4041 | (info, _("using multiple gp values"), (char *) NULL, |
| 4042 | output_bfd, (asection *) NULL, (bfd_vma) 0); |
| 4043 | } |
| 4044 | #endif |
| 4045 | |
| 4046 | /* Go through the sections and collect the .reginfo and .mdebug |
| 4047 | information. */ |
| 4048 | reginfo_sec = NULL; |
| 4049 | mdebug_sec = NULL; |
| 4050 | gptab_data_sec = NULL; |
| 4051 | gptab_bss_sec = NULL; |
| 4052 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) |
| 4053 | { |
| 4054 | #ifdef ERIC_neverdef |
| 4055 | if (strcmp (o->name, ".reginfo") == 0) |
| 4056 | { |
| 4057 | memset (®info, 0, sizeof reginfo); |
| 4058 | |
| 4059 | /* We have found the .reginfo section in the output file. |
| 4060 | Look through all the link_orders comprising it and merge |
| 4061 | the information together. */ |
| 4062 | for (p = o->link_order_head; |
| 4063 | p != (struct bfd_link_order *) NULL; |
| 4064 | p = p->next) |
| 4065 | { |
| 4066 | asection *input_section; |
| 4067 | bfd *input_bfd; |
| 4068 | Elf64_External_RegInfo ext; |
| 4069 | Elf64_RegInfo sub; |
| 4070 | |
| 4071 | if (p->type != bfd_indirect_link_order) |
| 4072 | { |
| 4073 | if (p->type == bfd_fill_link_order) |
| 4074 | continue; |
| 4075 | abort (); |
| 4076 | } |
| 4077 | |
| 4078 | input_section = p->u.indirect.section; |
| 4079 | input_bfd = input_section->owner; |
| 4080 | |
| 4081 | /* The linker emulation code has probably clobbered the |
| 4082 | size to be zero bytes. */ |
| 4083 | if (input_section->_raw_size == 0) |
| 4084 | input_section->_raw_size = sizeof (Elf64_External_RegInfo); |
| 4085 | |
| 4086 | if (! bfd_get_section_contents (input_bfd, input_section, |
| 4087 | (PTR) &ext, |
| 4088 | (file_ptr) 0, |
| 4089 | sizeof ext)) |
| 4090 | return false; |
| 4091 | |
| 4092 | bfd_alpha_elf64_swap_reginfo_in (input_bfd, &ext, &sub); |
| 4093 | |
| 4094 | reginfo.ri_gprmask |= sub.ri_gprmask; |
| 4095 | reginfo.ri_cprmask[0] |= sub.ri_cprmask[0]; |
| 4096 | reginfo.ri_cprmask[1] |= sub.ri_cprmask[1]; |
| 4097 | reginfo.ri_cprmask[2] |= sub.ri_cprmask[2]; |
| 4098 | reginfo.ri_cprmask[3] |= sub.ri_cprmask[3]; |
| 4099 | |
| 4100 | /* ri_gp_value is set by the function |
| 4101 | alpha_elf_section_processing when the section is |
| 4102 | finally written out. */ |
| 4103 | |
| 4104 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 4105 | elf_link_input_bfd ignores this section. */ |
| 4106 | input_section->flags &=~ SEC_HAS_CONTENTS; |
| 4107 | } |
| 4108 | |
| 4109 | /* Force the section size to the value we want. */ |
| 4110 | o->_raw_size = sizeof (Elf64_External_RegInfo); |
| 4111 | |
| 4112 | /* Skip this section later on (I don't think this currently |
| 4113 | matters, but someday it might). */ |
| 4114 | o->link_order_head = (struct bfd_link_order *) NULL; |
| 4115 | |
| 4116 | reginfo_sec = o; |
| 4117 | } |
| 4118 | #endif |
| 4119 | |
| 4120 | if (strcmp (o->name, ".mdebug") == 0) |
| 4121 | { |
| 4122 | struct extsym_info einfo; |
| 4123 | |
| 4124 | /* We have found the .mdebug section in the output file. |
| 4125 | Look through all the link_orders comprising it and merge |
| 4126 | the information together. */ |
| 4127 | symhdr->magic = swap->sym_magic; |
| 4128 | /* FIXME: What should the version stamp be? */ |
| 4129 | symhdr->vstamp = 0; |
| 4130 | symhdr->ilineMax = 0; |
| 4131 | symhdr->cbLine = 0; |
| 4132 | symhdr->idnMax = 0; |
| 4133 | symhdr->ipdMax = 0; |
| 4134 | symhdr->isymMax = 0; |
| 4135 | symhdr->ioptMax = 0; |
| 4136 | symhdr->iauxMax = 0; |
| 4137 | symhdr->issMax = 0; |
| 4138 | symhdr->issExtMax = 0; |
| 4139 | symhdr->ifdMax = 0; |
| 4140 | symhdr->crfd = 0; |
| 4141 | symhdr->iextMax = 0; |
| 4142 | |
| 4143 | /* We accumulate the debugging information itself in the |
| 4144 | debug_info structure. */ |
| 4145 | debug.line = NULL; |
| 4146 | debug.external_dnr = NULL; |
| 4147 | debug.external_pdr = NULL; |
| 4148 | debug.external_sym = NULL; |
| 4149 | debug.external_opt = NULL; |
| 4150 | debug.external_aux = NULL; |
| 4151 | debug.ss = NULL; |
| 4152 | debug.ssext = debug.ssext_end = NULL; |
| 4153 | debug.external_fdr = NULL; |
| 4154 | debug.external_rfd = NULL; |
| 4155 | debug.external_ext = debug.external_ext_end = NULL; |
| 4156 | |
| 4157 | mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info); |
| 4158 | if (mdebug_handle == (PTR) NULL) |
| 4159 | return false; |
| 4160 | |
| 4161 | if (1) |
| 4162 | { |
| 4163 | asection *s; |
| 4164 | EXTR esym; |
| 4165 | bfd_vma last = 0; |
| 4166 | unsigned int i; |
| 4167 | static const char * const name[] = |
| 4168 | { |
| 4169 | ".text", ".init", ".fini", ".data", |
| 4170 | ".rodata", ".sdata", ".sbss", ".bss" |
| 4171 | }; |
| 4172 | static const int sc[] = { scText, scInit, scFini, scData, |
| 4173 | scRData, scSData, scSBss, scBss }; |
| 4174 | |
| 4175 | esym.jmptbl = 0; |
| 4176 | esym.cobol_main = 0; |
| 4177 | esym.weakext = 0; |
| 4178 | esym.reserved = 0; |
| 4179 | esym.ifd = ifdNil; |
| 4180 | esym.asym.iss = issNil; |
| 4181 | esym.asym.st = stLocal; |
| 4182 | esym.asym.reserved = 0; |
| 4183 | esym.asym.index = indexNil; |
| 4184 | for (i = 0; i < 8; i++) |
| 4185 | { |
| 4186 | esym.asym.sc = sc[i]; |
| 4187 | s = bfd_get_section_by_name (abfd, name[i]); |
| 4188 | if (s != NULL) |
| 4189 | { |
| 4190 | esym.asym.value = s->vma; |
| 4191 | last = s->vma + s->_raw_size; |
| 4192 | } |
| 4193 | else |
| 4194 | esym.asym.value = last; |
| 4195 | |
| 4196 | if (! bfd_ecoff_debug_one_external (abfd, &debug, swap, |
| 4197 | name[i], &esym)) |
| 4198 | return false; |
| 4199 | } |
| 4200 | } |
| 4201 | |
| 4202 | for (p = o->link_order_head; |
| 4203 | p != (struct bfd_link_order *) NULL; |
| 4204 | p = p->next) |
| 4205 | { |
| 4206 | asection *input_section; |
| 4207 | bfd *input_bfd; |
| 4208 | const struct ecoff_debug_swap *input_swap; |
| 4209 | struct ecoff_debug_info input_debug; |
| 4210 | char *eraw_src; |
| 4211 | char *eraw_end; |
| 4212 | |
| 4213 | if (p->type != bfd_indirect_link_order) |
| 4214 | { |
| 4215 | if (p->type == bfd_fill_link_order) |
| 4216 | continue; |
| 4217 | abort (); |
| 4218 | } |
| 4219 | |
| 4220 | input_section = p->u.indirect.section; |
| 4221 | input_bfd = input_section->owner; |
| 4222 | |
| 4223 | if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour |
| 4224 | || (get_elf_backend_data (input_bfd) |
| 4225 | ->elf_backend_ecoff_debug_swap) == NULL) |
| 4226 | { |
| 4227 | /* I don't know what a non ALPHA ELF bfd would be |
| 4228 | doing with a .mdebug section, but I don't really |
| 4229 | want to deal with it. */ |
| 4230 | continue; |
| 4231 | } |
| 4232 | |
| 4233 | input_swap = (get_elf_backend_data (input_bfd) |
| 4234 | ->elf_backend_ecoff_debug_swap); |
| 4235 | |
| 4236 | BFD_ASSERT (p->size == input_section->_raw_size); |
| 4237 | |
| 4238 | /* The ECOFF linking code expects that we have already |
| 4239 | read in the debugging information and set up an |
| 4240 | ecoff_debug_info structure, so we do that now. */ |
| 4241 | if (!elf64_alpha_read_ecoff_info (input_bfd, input_section, |
| 4242 | &input_debug)) |
| 4243 | return false; |
| 4244 | |
| 4245 | if (! (bfd_ecoff_debug_accumulate |
| 4246 | (mdebug_handle, abfd, &debug, swap, input_bfd, |
| 4247 | &input_debug, input_swap, info))) |
| 4248 | return false; |
| 4249 | |
| 4250 | /* Loop through the external symbols. For each one with |
| 4251 | interesting information, try to find the symbol in |
| 4252 | the linker global hash table and save the information |
| 4253 | for the output external symbols. */ |
| 4254 | eraw_src = input_debug.external_ext; |
| 4255 | eraw_end = (eraw_src |
| 4256 | + (input_debug.symbolic_header.iextMax |
| 4257 | * input_swap->external_ext_size)); |
| 4258 | for (; |
| 4259 | eraw_src < eraw_end; |
| 4260 | eraw_src += input_swap->external_ext_size) |
| 4261 | { |
| 4262 | EXTR ext; |
| 4263 | const char *name; |
| 4264 | struct alpha_elf_link_hash_entry *h; |
| 4265 | |
| 4266 | (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext); |
| 4267 | if (ext.asym.sc == scNil |
| 4268 | || ext.asym.sc == scUndefined |
| 4269 | || ext.asym.sc == scSUndefined) |
| 4270 | continue; |
| 4271 | |
| 4272 | name = input_debug.ssext + ext.asym.iss; |
| 4273 | h = alpha_elf_link_hash_lookup (alpha_elf_hash_table (info), |
| 4274 | name, false, false, true); |
| 4275 | if (h == NULL || h->esym.ifd != -2) |
| 4276 | continue; |
| 4277 | |
| 4278 | if (ext.ifd != -1) |
| 4279 | { |
| 4280 | BFD_ASSERT (ext.ifd |
| 4281 | < input_debug.symbolic_header.ifdMax); |
| 4282 | ext.ifd = input_debug.ifdmap[ext.ifd]; |
| 4283 | } |
| 4284 | |
| 4285 | h->esym = ext; |
| 4286 | } |
| 4287 | |
| 4288 | /* Free up the information we just read. */ |
| 4289 | free (input_debug.line); |
| 4290 | free (input_debug.external_dnr); |
| 4291 | free (input_debug.external_pdr); |
| 4292 | free (input_debug.external_sym); |
| 4293 | free (input_debug.external_opt); |
| 4294 | free (input_debug.external_aux); |
| 4295 | free (input_debug.ss); |
| 4296 | free (input_debug.ssext); |
| 4297 | free (input_debug.external_fdr); |
| 4298 | free (input_debug.external_rfd); |
| 4299 | free (input_debug.external_ext); |
| 4300 | |
| 4301 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 4302 | elf_link_input_bfd ignores this section. */ |
| 4303 | input_section->flags &=~ SEC_HAS_CONTENTS; |
| 4304 | } |
| 4305 | |
| 4306 | #ifdef ERIC_neverdef |
| 4307 | if (info->shared) |
| 4308 | { |
| 4309 | /* Create .rtproc section. */ |
| 4310 | rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc"); |
| 4311 | if (rtproc_sec == NULL) |
| 4312 | { |
| 4313 | flagword flags = (SEC_HAS_CONTENTS |
| 4314 | | SEC_IN_MEMORY |
| 4315 | | SEC_LINKER_CREATED |
| 4316 | | SEC_READONLY); |
| 4317 | |
| 4318 | rtproc_sec = bfd_make_section (abfd, ".rtproc"); |
| 4319 | if (rtproc_sec == NULL |
| 4320 | || ! bfd_set_section_flags (abfd, rtproc_sec, flags) |
| 4321 | || ! bfd_set_section_alignment (abfd, rtproc_sec, 12)) |
| 4322 | return false; |
| 4323 | } |
| 4324 | |
| 4325 | if (! alpha_elf_create_procedure_table (mdebug_handle, abfd, |
| 4326 | info, rtproc_sec, &debug)) |
| 4327 | return false; |
| 4328 | } |
| 4329 | #endif |
| 4330 | |
| 4331 | /* Build the external symbol information. */ |
| 4332 | einfo.abfd = abfd; |
| 4333 | einfo.info = info; |
| 4334 | einfo.debug = &debug; |
| 4335 | einfo.swap = swap; |
| 4336 | einfo.failed = false; |
| 4337 | elf_link_hash_traverse (elf_hash_table (info), |
| 4338 | elf64_alpha_output_extsym, |
| 4339 | (PTR) &einfo); |
| 4340 | if (einfo.failed) |
| 4341 | return false; |
| 4342 | |
| 4343 | /* Set the size of the .mdebug section. */ |
| 4344 | o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap); |
| 4345 | |
| 4346 | /* Skip this section later on (I don't think this currently |
| 4347 | matters, but someday it might). */ |
| 4348 | o->link_order_head = (struct bfd_link_order *) NULL; |
| 4349 | |
| 4350 | mdebug_sec = o; |
| 4351 | } |
| 4352 | |
| 4353 | #ifdef ERIC_neverdef |
| 4354 | if (strncmp (o->name, ".gptab.", sizeof ".gptab." - 1) == 0) |
| 4355 | { |
| 4356 | const char *subname; |
| 4357 | unsigned int c; |
| 4358 | Elf64_gptab *tab; |
| 4359 | Elf64_External_gptab *ext_tab; |
| 4360 | unsigned int i; |
| 4361 | |
| 4362 | /* The .gptab.sdata and .gptab.sbss sections hold |
| 4363 | information describing how the small data area would |
| 4364 | change depending upon the -G switch. These sections |
| 4365 | not used in executables files. */ |
| 4366 | if (! info->relocateable) |
| 4367 | { |
| 4368 | asection **secpp; |
| 4369 | |
| 4370 | for (p = o->link_order_head; |
| 4371 | p != (struct bfd_link_order *) NULL; |
| 4372 | p = p->next) |
| 4373 | { |
| 4374 | asection *input_section; |
| 4375 | |
| 4376 | if (p->type != bfd_indirect_link_order) |
| 4377 | { |
| 4378 | if (p->type == bfd_fill_link_order) |
| 4379 | continue; |
| 4380 | abort (); |
| 4381 | } |
| 4382 | |
| 4383 | input_section = p->u.indirect.section; |
| 4384 | |
| 4385 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 4386 | elf_link_input_bfd ignores this section. */ |
| 4387 | input_section->flags &=~ SEC_HAS_CONTENTS; |
| 4388 | } |
| 4389 | |
| 4390 | /* Skip this section later on (I don't think this |
| 4391 | currently matters, but someday it might). */ |
| 4392 | o->link_order_head = (struct bfd_link_order *) NULL; |
| 4393 | |
| 4394 | /* Really remove the section. */ |
| 4395 | for (secpp = &abfd->sections; |
| 4396 | *secpp != o; |
| 4397 | secpp = &(*secpp)->next) |
| 4398 | ; |
| 4399 | *secpp = (*secpp)->next; |
| 4400 | --abfd->section_count; |
| 4401 | |
| 4402 | continue; |
| 4403 | } |
| 4404 | |
| 4405 | /* There is one gptab for initialized data, and one for |
| 4406 | uninitialized data. */ |
| 4407 | if (strcmp (o->name, ".gptab.sdata") == 0) |
| 4408 | gptab_data_sec = o; |
| 4409 | else if (strcmp (o->name, ".gptab.sbss") == 0) |
| 4410 | gptab_bss_sec = o; |
| 4411 | else |
| 4412 | { |
| 4413 | (*_bfd_error_handler) |
| 4414 | (_("%s: illegal section name `%s'"), |
| 4415 | bfd_get_filename (abfd), o->name); |
| 4416 | bfd_set_error (bfd_error_nonrepresentable_section); |
| 4417 | return false; |
| 4418 | } |
| 4419 | |
| 4420 | /* The linker script always combines .gptab.data and |
| 4421 | .gptab.sdata into .gptab.sdata, and likewise for |
| 4422 | .gptab.bss and .gptab.sbss. It is possible that there is |
| 4423 | no .sdata or .sbss section in the output file, in which |
| 4424 | case we must change the name of the output section. */ |
| 4425 | subname = o->name + sizeof ".gptab" - 1; |
| 4426 | if (bfd_get_section_by_name (abfd, subname) == NULL) |
| 4427 | { |
| 4428 | if (o == gptab_data_sec) |
| 4429 | o->name = ".gptab.data"; |
| 4430 | else |
| 4431 | o->name = ".gptab.bss"; |
| 4432 | subname = o->name + sizeof ".gptab" - 1; |
| 4433 | BFD_ASSERT (bfd_get_section_by_name (abfd, subname) != NULL); |
| 4434 | } |
| 4435 | |
| 4436 | /* Set up the first entry. */ |
| 4437 | c = 1; |
| 4438 | tab = (Elf64_gptab *) bfd_malloc (c * sizeof (Elf64_gptab)); |
| 4439 | if (tab == NULL) |
| 4440 | return false; |
| 4441 | tab[0].gt_header.gt_current_g_value = elf_gp_size (abfd); |
| 4442 | tab[0].gt_header.gt_unused = 0; |
| 4443 | |
| 4444 | /* Combine the input sections. */ |
| 4445 | for (p = o->link_order_head; |
| 4446 | p != (struct bfd_link_order *) NULL; |
| 4447 | p = p->next) |
| 4448 | { |
| 4449 | asection *input_section; |
| 4450 | bfd *input_bfd; |
| 4451 | bfd_size_type size; |
| 4452 | unsigned long last; |
| 4453 | bfd_size_type gpentry; |
| 4454 | |
| 4455 | if (p->type != bfd_indirect_link_order) |
| 4456 | { |
| 4457 | if (p->type == bfd_fill_link_order) |
| 4458 | continue; |
| 4459 | abort (); |
| 4460 | } |
| 4461 | |
| 4462 | input_section = p->u.indirect.section; |
| 4463 | input_bfd = input_section->owner; |
| 4464 | |
| 4465 | /* Combine the gptab entries for this input section one |
| 4466 | by one. We know that the input gptab entries are |
| 4467 | sorted by ascending -G value. */ |
| 4468 | size = bfd_section_size (input_bfd, input_section); |
| 4469 | last = 0; |
| 4470 | for (gpentry = sizeof (Elf64_External_gptab); |
| 4471 | gpentry < size; |
| 4472 | gpentry += sizeof (Elf64_External_gptab)) |
| 4473 | { |
| 4474 | Elf64_External_gptab ext_gptab; |
| 4475 | Elf64_gptab int_gptab; |
| 4476 | unsigned long val; |
| 4477 | unsigned long add; |
| 4478 | boolean exact; |
| 4479 | unsigned int look; |
| 4480 | |
| 4481 | if (! (bfd_get_section_contents |
| 4482 | (input_bfd, input_section, (PTR) &ext_gptab, |
| 4483 | gpentry, sizeof (Elf64_External_gptab)))) |
| 4484 | { |
| 4485 | free (tab); |
| 4486 | return false; |
| 4487 | } |
| 4488 | |
| 4489 | bfd_alpha_elf64_swap_gptab_in (input_bfd, &ext_gptab, |
| 4490 | &int_gptab); |
| 4491 | val = int_gptab.gt_entry.gt_g_value; |
| 4492 | add = int_gptab.gt_entry.gt_bytes - last; |
| 4493 | |
| 4494 | exact = false; |
| 4495 | for (look = 1; look < c; look++) |
| 4496 | { |
| 4497 | if (tab[look].gt_entry.gt_g_value >= val) |
| 4498 | tab[look].gt_entry.gt_bytes += add; |
| 4499 | |
| 4500 | if (tab[look].gt_entry.gt_g_value == val) |
| 4501 | exact = true; |
| 4502 | } |
| 4503 | |
| 4504 | if (! exact) |
| 4505 | { |
| 4506 | Elf64_gptab *new_tab; |
| 4507 | unsigned int max; |
| 4508 | |
| 4509 | /* We need a new table entry. */ |
| 4510 | new_tab = ((Elf64_gptab *) |
| 4511 | bfd_realloc ((PTR) tab, |
| 4512 | (c + 1) * sizeof (Elf64_gptab))); |
| 4513 | if (new_tab == NULL) |
| 4514 | { |
| 4515 | free (tab); |
| 4516 | return false; |
| 4517 | } |
| 4518 | tab = new_tab; |
| 4519 | tab[c].gt_entry.gt_g_value = val; |
| 4520 | tab[c].gt_entry.gt_bytes = add; |
| 4521 | |
| 4522 | /* Merge in the size for the next smallest -G |
| 4523 | value, since that will be implied by this new |
| 4524 | value. */ |
| 4525 | max = 0; |
| 4526 | for (look = 1; look < c; look++) |
| 4527 | { |
| 4528 | if (tab[look].gt_entry.gt_g_value < val |
| 4529 | && (max == 0 |
| 4530 | || (tab[look].gt_entry.gt_g_value |
| 4531 | > tab[max].gt_entry.gt_g_value))) |
| 4532 | max = look; |
| 4533 | } |
| 4534 | if (max != 0) |
| 4535 | tab[c].gt_entry.gt_bytes += |
| 4536 | tab[max].gt_entry.gt_bytes; |
| 4537 | |
| 4538 | ++c; |
| 4539 | } |
| 4540 | |
| 4541 | last = int_gptab.gt_entry.gt_bytes; |
| 4542 | } |
| 4543 | |
| 4544 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 4545 | elf_link_input_bfd ignores this section. */ |
| 4546 | input_section->flags &=~ SEC_HAS_CONTENTS; |
| 4547 | } |
| 4548 | |
| 4549 | /* The table must be sorted by -G value. */ |
| 4550 | if (c > 2) |
| 4551 | qsort (tab + 1, c - 1, sizeof (tab[0]), gptab_compare); |
| 4552 | |
| 4553 | /* Swap out the table. */ |
| 4554 | ext_tab = ((Elf64_External_gptab *) |
| 4555 | bfd_alloc (abfd, c * sizeof (Elf64_External_gptab))); |
| 4556 | if (ext_tab == NULL) |
| 4557 | { |
| 4558 | free (tab); |
| 4559 | return false; |
| 4560 | } |
| 4561 | |
| 4562 | for (i = 0; i < c; i++) |
| 4563 | bfd_alpha_elf64_swap_gptab_out (abfd, tab + i, ext_tab + i); |
| 4564 | free (tab); |
| 4565 | |
| 4566 | o->_raw_size = c * sizeof (Elf64_External_gptab); |
| 4567 | o->contents = (bfd_byte *) ext_tab; |
| 4568 | |
| 4569 | /* Skip this section later on (I don't think this currently |
| 4570 | matters, but someday it might). */ |
| 4571 | o->link_order_head = (struct bfd_link_order *) NULL; |
| 4572 | } |
| 4573 | #endif |
| 4574 | |
| 4575 | } |
| 4576 | |
| 4577 | /* Invoke the regular ELF backend linker to do all the work. */ |
| 4578 | if (! bfd_elf64_bfd_final_link (abfd, info)) |
| 4579 | return false; |
| 4580 | |
| 4581 | /* Now write out the computed sections. */ |
| 4582 | |
| 4583 | /* The .got subsections... */ |
| 4584 | { |
| 4585 | bfd *i, *dynobj = elf_hash_table(info)->dynobj; |
| 4586 | for (i = alpha_elf_hash_table(info)->got_list; |
| 4587 | i != NULL; |
| 4588 | i = alpha_elf_tdata(i)->got_link_next) |
| 4589 | { |
| 4590 | asection *sgot; |
| 4591 | |
| 4592 | /* elf_bfd_final_link already did everything in dynobj. */ |
| 4593 | if (i == dynobj) |
| 4594 | continue; |
| 4595 | |
| 4596 | sgot = alpha_elf_tdata(i)->got; |
| 4597 | if (! bfd_set_section_contents (abfd, sgot->output_section, |
| 4598 | sgot->contents, sgot->output_offset, |
| 4599 | sgot->_raw_size)) |
| 4600 | return false; |
| 4601 | } |
| 4602 | } |
| 4603 | |
| 4604 | #ifdef ERIC_neverdef |
| 4605 | if (reginfo_sec != (asection *) NULL) |
| 4606 | { |
| 4607 | Elf64_External_RegInfo ext; |
| 4608 | |
| 4609 | bfd_alpha_elf64_swap_reginfo_out (abfd, ®info, &ext); |
| 4610 | if (! bfd_set_section_contents (abfd, reginfo_sec, (PTR) &ext, |
| 4611 | (file_ptr) 0, sizeof ext)) |
| 4612 | return false; |
| 4613 | } |
| 4614 | #endif |
| 4615 | |
| 4616 | if (mdebug_sec != (asection *) NULL) |
| 4617 | { |
| 4618 | BFD_ASSERT (abfd->output_has_begun); |
| 4619 | if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug, |
| 4620 | swap, info, |
| 4621 | mdebug_sec->filepos)) |
| 4622 | return false; |
| 4623 | |
| 4624 | bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info); |
| 4625 | } |
| 4626 | |
| 4627 | if (gptab_data_sec != (asection *) NULL) |
| 4628 | { |
| 4629 | if (! bfd_set_section_contents (abfd, gptab_data_sec, |
| 4630 | gptab_data_sec->contents, |
| 4631 | (file_ptr) 0, |
| 4632 | gptab_data_sec->_raw_size)) |
| 4633 | return false; |
| 4634 | } |
| 4635 | |
| 4636 | if (gptab_bss_sec != (asection *) NULL) |
| 4637 | { |
| 4638 | if (! bfd_set_section_contents (abfd, gptab_bss_sec, |
| 4639 | gptab_bss_sec->contents, |
| 4640 | (file_ptr) 0, |
| 4641 | gptab_bss_sec->_raw_size)) |
| 4642 | return false; |
| 4643 | } |
| 4644 | |
| 4645 | return true; |
| 4646 | } |
| 4647 | |
| 4648 | static enum elf_reloc_type_class |
| 4649 | elf64_alpha_reloc_type_class (type) |
| 4650 | int type; |
| 4651 | { |
| 4652 | switch (type) |
| 4653 | { |
| 4654 | case R_ALPHA_RELATIVE: |
| 4655 | return reloc_class_relative; |
| 4656 | case R_ALPHA_JMP_SLOT: |
| 4657 | return reloc_class_plt; |
| 4658 | case R_ALPHA_COPY: |
| 4659 | return reloc_class_copy; |
| 4660 | default: |
| 4661 | return reloc_class_normal; |
| 4662 | } |
| 4663 | } |
| 4664 | \f |
| 4665 | /* ECOFF swapping routines. These are used when dealing with the |
| 4666 | .mdebug section, which is in the ECOFF debugging format. Copied |
| 4667 | from elf32-mips.c. */ |
| 4668 | static const struct ecoff_debug_swap |
| 4669 | elf64_alpha_ecoff_debug_swap = |
| 4670 | { |
| 4671 | /* Symbol table magic number. */ |
| 4672 | magicSym2, |
| 4673 | /* Alignment of debugging information. E.g., 4. */ |
| 4674 | 8, |
| 4675 | /* Sizes of external symbolic information. */ |
| 4676 | sizeof (struct hdr_ext), |
| 4677 | sizeof (struct dnr_ext), |
| 4678 | sizeof (struct pdr_ext), |
| 4679 | sizeof (struct sym_ext), |
| 4680 | sizeof (struct opt_ext), |
| 4681 | sizeof (struct fdr_ext), |
| 4682 | sizeof (struct rfd_ext), |
| 4683 | sizeof (struct ext_ext), |
| 4684 | /* Functions to swap in external symbolic data. */ |
| 4685 | ecoff_swap_hdr_in, |
| 4686 | ecoff_swap_dnr_in, |
| 4687 | ecoff_swap_pdr_in, |
| 4688 | ecoff_swap_sym_in, |
| 4689 | ecoff_swap_opt_in, |
| 4690 | ecoff_swap_fdr_in, |
| 4691 | ecoff_swap_rfd_in, |
| 4692 | ecoff_swap_ext_in, |
| 4693 | _bfd_ecoff_swap_tir_in, |
| 4694 | _bfd_ecoff_swap_rndx_in, |
| 4695 | /* Functions to swap out external symbolic data. */ |
| 4696 | ecoff_swap_hdr_out, |
| 4697 | ecoff_swap_dnr_out, |
| 4698 | ecoff_swap_pdr_out, |
| 4699 | ecoff_swap_sym_out, |
| 4700 | ecoff_swap_opt_out, |
| 4701 | ecoff_swap_fdr_out, |
| 4702 | ecoff_swap_rfd_out, |
| 4703 | ecoff_swap_ext_out, |
| 4704 | _bfd_ecoff_swap_tir_out, |
| 4705 | _bfd_ecoff_swap_rndx_out, |
| 4706 | /* Function to read in symbolic data. */ |
| 4707 | elf64_alpha_read_ecoff_info |
| 4708 | }; |
| 4709 | \f |
| 4710 | /* Use a non-standard hash bucket size of 8. */ |
| 4711 | |
| 4712 | const struct elf_size_info alpha_elf_size_info = |
| 4713 | { |
| 4714 | sizeof (Elf64_External_Ehdr), |
| 4715 | sizeof (Elf64_External_Phdr), |
| 4716 | sizeof (Elf64_External_Shdr), |
| 4717 | sizeof (Elf64_External_Rel), |
| 4718 | sizeof (Elf64_External_Rela), |
| 4719 | sizeof (Elf64_External_Sym), |
| 4720 | sizeof (Elf64_External_Dyn), |
| 4721 | sizeof (Elf_External_Note), |
| 4722 | 8, |
| 4723 | 1, |
| 4724 | 64, 8, |
| 4725 | ELFCLASS64, EV_CURRENT, |
| 4726 | bfd_elf64_write_out_phdrs, |
| 4727 | bfd_elf64_write_shdrs_and_ehdr, |
| 4728 | bfd_elf64_write_relocs, |
| 4729 | bfd_elf64_swap_symbol_out, |
| 4730 | bfd_elf64_slurp_reloc_table, |
| 4731 | bfd_elf64_slurp_symbol_table, |
| 4732 | bfd_elf64_swap_dyn_in, |
| 4733 | bfd_elf64_swap_dyn_out, |
| 4734 | NULL, |
| 4735 | NULL, |
| 4736 | NULL, |
| 4737 | NULL |
| 4738 | }; |
| 4739 | |
| 4740 | #define TARGET_LITTLE_SYM bfd_elf64_alpha_vec |
| 4741 | #define TARGET_LITTLE_NAME "elf64-alpha" |
| 4742 | #define ELF_ARCH bfd_arch_alpha |
| 4743 | #define ELF_MACHINE_CODE EM_ALPHA |
| 4744 | #define ELF_MAXPAGESIZE 0x10000 |
| 4745 | |
| 4746 | #define bfd_elf64_bfd_link_hash_table_create \ |
| 4747 | elf64_alpha_bfd_link_hash_table_create |
| 4748 | |
| 4749 | #define bfd_elf64_bfd_reloc_type_lookup \ |
| 4750 | elf64_alpha_bfd_reloc_type_lookup |
| 4751 | #define elf_info_to_howto \ |
| 4752 | elf64_alpha_info_to_howto |
| 4753 | |
| 4754 | #define bfd_elf64_mkobject \ |
| 4755 | elf64_alpha_mkobject |
| 4756 | #define elf_backend_object_p \ |
| 4757 | elf64_alpha_object_p |
| 4758 | |
| 4759 | #define elf_backend_section_from_shdr \ |
| 4760 | elf64_alpha_section_from_shdr |
| 4761 | #define elf_backend_fake_sections \ |
| 4762 | elf64_alpha_fake_sections |
| 4763 | |
| 4764 | #define bfd_elf64_bfd_is_local_label_name \ |
| 4765 | elf64_alpha_is_local_label_name |
| 4766 | #define bfd_elf64_find_nearest_line \ |
| 4767 | elf64_alpha_find_nearest_line |
| 4768 | #define bfd_elf64_bfd_relax_section \ |
| 4769 | elf64_alpha_relax_section |
| 4770 | |
| 4771 | #define elf_backend_add_symbol_hook \ |
| 4772 | elf64_alpha_add_symbol_hook |
| 4773 | #define elf_backend_check_relocs \ |
| 4774 | elf64_alpha_check_relocs |
| 4775 | #define elf_backend_create_dynamic_sections \ |
| 4776 | elf64_alpha_create_dynamic_sections |
| 4777 | #define elf_backend_adjust_dynamic_symbol \ |
| 4778 | elf64_alpha_adjust_dynamic_symbol |
| 4779 | #define elf_backend_always_size_sections \ |
| 4780 | elf64_alpha_always_size_sections |
| 4781 | #define elf_backend_size_dynamic_sections \ |
| 4782 | elf64_alpha_size_dynamic_sections |
| 4783 | #define elf_backend_relocate_section \ |
| 4784 | elf64_alpha_relocate_section |
| 4785 | #define elf_backend_finish_dynamic_symbol \ |
| 4786 | elf64_alpha_finish_dynamic_symbol |
| 4787 | #define elf_backend_finish_dynamic_sections \ |
| 4788 | elf64_alpha_finish_dynamic_sections |
| 4789 | #define bfd_elf64_bfd_final_link \ |
| 4790 | elf64_alpha_final_link |
| 4791 | #define elf_backend_reloc_type_class \ |
| 4792 | elf64_alpha_reloc_type_class |
| 4793 | |
| 4794 | #define elf_backend_ecoff_debug_swap \ |
| 4795 | &elf64_alpha_ecoff_debug_swap |
| 4796 | |
| 4797 | #define elf_backend_size_info \ |
| 4798 | alpha_elf_size_info |
| 4799 | |
| 4800 | /* A few constants that determine how the .plt section is set up. */ |
| 4801 | #define elf_backend_want_got_plt 0 |
| 4802 | #define elf_backend_plt_readonly 0 |
| 4803 | #define elf_backend_want_plt_sym 1 |
| 4804 | #define elf_backend_got_header_size 0 |
| 4805 | #define elf_backend_plt_header_size PLT_HEADER_SIZE |
| 4806 | |
| 4807 | #include "elf64-target.h" |