| 1 | /* VAX series support for 32-bit ELF |
| 2 | Copyright (C) 1993-2020 Free Software Foundation, Inc. |
| 3 | Contributed by Matt Thomas <matt@3am-software.com>. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 20 | MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "sysdep.h" |
| 23 | #include "bfd.h" |
| 24 | #include "bfdlink.h" |
| 25 | #include "libbfd.h" |
| 26 | #include "elf-bfd.h" |
| 27 | #include "elf/vax.h" |
| 28 | |
| 29 | static reloc_howto_type *reloc_type_lookup (bfd *, bfd_reloc_code_real_type); |
| 30 | static bfd_boolean rtype_to_howto (bfd *, arelent *, Elf_Internal_Rela *); |
| 31 | static struct bfd_hash_entry *elf_vax_link_hash_newfunc (struct bfd_hash_entry *, |
| 32 | struct bfd_hash_table *, |
| 33 | const char *); |
| 34 | static struct bfd_link_hash_table *elf_vax_link_hash_table_create (bfd *); |
| 35 | static bfd_boolean elf_vax_check_relocs (bfd *, struct bfd_link_info *, |
| 36 | asection *, const Elf_Internal_Rela *); |
| 37 | static bfd_boolean elf_vax_adjust_dynamic_symbol (struct bfd_link_info *, |
| 38 | struct elf_link_hash_entry *); |
| 39 | static bfd_boolean elf_vax_size_dynamic_sections (bfd *, struct bfd_link_info *); |
| 40 | static bfd_boolean elf_vax_relocate_section (bfd *, struct bfd_link_info *, |
| 41 | bfd *, asection *, bfd_byte *, |
| 42 | Elf_Internal_Rela *, |
| 43 | Elf_Internal_Sym *, asection **); |
| 44 | static bfd_boolean elf_vax_finish_dynamic_symbol (bfd *, struct bfd_link_info *, |
| 45 | struct elf_link_hash_entry *, |
| 46 | Elf_Internal_Sym *); |
| 47 | static bfd_boolean elf_vax_finish_dynamic_sections (bfd *, |
| 48 | struct bfd_link_info *); |
| 49 | static bfd_vma elf_vax_plt_sym_val (bfd_vma, const asection *, |
| 50 | const arelent *); |
| 51 | |
| 52 | static bfd_boolean elf32_vax_set_private_flags (bfd *, flagword); |
| 53 | static bfd_boolean elf32_vax_print_private_bfd_data (bfd *, void *); |
| 54 | |
| 55 | static reloc_howto_type howto_table[] = { |
| 56 | HOWTO (R_VAX_NONE, /* type */ |
| 57 | 0, /* rightshift */ |
| 58 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 59 | 0, /* bitsize */ |
| 60 | FALSE, /* pc_relative */ |
| 61 | 0, /* bitpos */ |
| 62 | complain_overflow_dont, /* complain_on_overflow */ |
| 63 | bfd_elf_generic_reloc, /* special_function */ |
| 64 | "R_VAX_NONE", /* name */ |
| 65 | FALSE, /* partial_inplace */ |
| 66 | 0, /* src_mask */ |
| 67 | 0x00000000, /* dst_mask */ |
| 68 | FALSE), /* pcrel_offset */ |
| 69 | |
| 70 | HOWTO (R_VAX_32, /* type */ |
| 71 | 0, /* rightshift */ |
| 72 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 73 | 32, /* bitsize */ |
| 74 | FALSE, /* pc_relative */ |
| 75 | 0, /* bitpos */ |
| 76 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 77 | bfd_elf_generic_reloc, /* special_function */ |
| 78 | "R_VAX_32", /* name */ |
| 79 | FALSE, /* partial_inplace */ |
| 80 | 0, /* src_mask */ |
| 81 | 0xffffffff, /* dst_mask */ |
| 82 | FALSE), /* pcrel_offset */ |
| 83 | |
| 84 | HOWTO (R_VAX_16, /* type */ |
| 85 | 0, /* rightshift */ |
| 86 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 87 | 16, /* bitsize */ |
| 88 | FALSE, /* pc_relative */ |
| 89 | 0, /* bitpos */ |
| 90 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 91 | bfd_elf_generic_reloc, /* special_function */ |
| 92 | "R_VAX_16", /* name */ |
| 93 | FALSE, /* partial_inplace */ |
| 94 | 0, /* src_mask */ |
| 95 | 0x0000ffff, /* dst_mask */ |
| 96 | FALSE), /* pcrel_offset */ |
| 97 | |
| 98 | HOWTO (R_VAX_8, /* type */ |
| 99 | 0, /* rightshift */ |
| 100 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 101 | 8, /* bitsize */ |
| 102 | FALSE, /* pc_relative */ |
| 103 | 0, /* bitpos */ |
| 104 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 105 | bfd_elf_generic_reloc, /* special_function */ |
| 106 | "R_VAX_8", /* name */ |
| 107 | FALSE, /* partial_inplace */ |
| 108 | 0, /* src_mask */ |
| 109 | 0x000000ff, /* dst_mask */ |
| 110 | FALSE), /* pcrel_offset */ |
| 111 | |
| 112 | HOWTO (R_VAX_PC32, /* type */ |
| 113 | 0, /* rightshift */ |
| 114 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 115 | 32, /* bitsize */ |
| 116 | TRUE, /* pc_relative */ |
| 117 | 0, /* bitpos */ |
| 118 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 119 | bfd_elf_generic_reloc, /* special_function */ |
| 120 | "R_VAX_PC32", /* name */ |
| 121 | FALSE, /* partial_inplace */ |
| 122 | 0, /* src_mask */ |
| 123 | 0xffffffff, /* dst_mask */ |
| 124 | TRUE), /* pcrel_offset */ |
| 125 | |
| 126 | HOWTO (R_VAX_PC16, /* type */ |
| 127 | 0, /* rightshift */ |
| 128 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 129 | 16, /* bitsize */ |
| 130 | TRUE, /* pc_relative */ |
| 131 | 0, /* bitpos */ |
| 132 | complain_overflow_signed, /* complain_on_overflow */ |
| 133 | bfd_elf_generic_reloc, /* special_function */ |
| 134 | "R_VAX_PC16", /* name */ |
| 135 | FALSE, /* partial_inplace */ |
| 136 | 0, /* src_mask */ |
| 137 | 0x0000ffff, /* dst_mask */ |
| 138 | TRUE), /* pcrel_offset */ |
| 139 | |
| 140 | HOWTO (R_VAX_PC8, /* type */ |
| 141 | 0, /* rightshift */ |
| 142 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 143 | 8, /* bitsize */ |
| 144 | TRUE, /* pc_relative */ |
| 145 | 0, /* bitpos */ |
| 146 | complain_overflow_signed, /* complain_on_overflow */ |
| 147 | bfd_elf_generic_reloc, /* special_function */ |
| 148 | "R_VAX_PC8", /* name */ |
| 149 | FALSE, /* partial_inplace */ |
| 150 | 0, /* src_mask */ |
| 151 | 0x000000ff, /* dst_mask */ |
| 152 | TRUE), /* pcrel_offset */ |
| 153 | |
| 154 | HOWTO (R_VAX_GOT32, /* type */ |
| 155 | 0, /* rightshift */ |
| 156 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 157 | 32, /* bitsize */ |
| 158 | TRUE, /* pc_relative */ |
| 159 | 0, /* bitpos */ |
| 160 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 161 | bfd_elf_generic_reloc, /* special_function */ |
| 162 | "R_VAX_GOT32", /* name */ |
| 163 | FALSE, /* partial_inplace */ |
| 164 | 0, /* src_mask */ |
| 165 | 0xffffffff, /* dst_mask */ |
| 166 | TRUE), /* pcrel_offset */ |
| 167 | |
| 168 | EMPTY_HOWTO (-1), |
| 169 | EMPTY_HOWTO (-1), |
| 170 | EMPTY_HOWTO (-1), |
| 171 | EMPTY_HOWTO (-1), |
| 172 | EMPTY_HOWTO (-1), |
| 173 | |
| 174 | HOWTO (R_VAX_PLT32, /* type */ |
| 175 | 0, /* rightshift */ |
| 176 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 177 | 32, /* bitsize */ |
| 178 | TRUE, /* pc_relative */ |
| 179 | 0, /* bitpos */ |
| 180 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 181 | bfd_elf_generic_reloc, /* special_function */ |
| 182 | "R_VAX_PLT32", /* name */ |
| 183 | FALSE, /* partial_inplace */ |
| 184 | 0, /* src_mask */ |
| 185 | 0xffffffff, /* dst_mask */ |
| 186 | TRUE), /* pcrel_offset */ |
| 187 | |
| 188 | EMPTY_HOWTO (-1), |
| 189 | EMPTY_HOWTO (-1), |
| 190 | EMPTY_HOWTO (-1), |
| 191 | EMPTY_HOWTO (-1), |
| 192 | EMPTY_HOWTO (-1), |
| 193 | |
| 194 | HOWTO (R_VAX_COPY, /* type */ |
| 195 | 0, /* rightshift */ |
| 196 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 197 | 0, /* bitsize */ |
| 198 | FALSE, /* pc_relative */ |
| 199 | 0, /* bitpos */ |
| 200 | complain_overflow_dont, /* complain_on_overflow */ |
| 201 | bfd_elf_generic_reloc, /* special_function */ |
| 202 | "R_VAX_COPY", /* name */ |
| 203 | FALSE, /* partial_inplace */ |
| 204 | 0, /* src_mask */ |
| 205 | 0xffffffff, /* dst_mask */ |
| 206 | FALSE), /* pcrel_offset */ |
| 207 | |
| 208 | HOWTO (R_VAX_GLOB_DAT, /* type */ |
| 209 | 0, /* rightshift */ |
| 210 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 211 | 32, /* bitsize */ |
| 212 | FALSE, /* pc_relative */ |
| 213 | 0, /* bitpos */ |
| 214 | complain_overflow_dont, /* complain_on_overflow */ |
| 215 | bfd_elf_generic_reloc, /* special_function */ |
| 216 | "R_VAX_GLOB_DAT", /* name */ |
| 217 | FALSE, /* partial_inplace */ |
| 218 | 0, /* src_mask */ |
| 219 | 0xffffffff, /* dst_mask */ |
| 220 | FALSE), /* pcrel_offset */ |
| 221 | |
| 222 | HOWTO (R_VAX_JMP_SLOT, /* type */ |
| 223 | 0, /* rightshift */ |
| 224 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 225 | 32, /* bitsize */ |
| 226 | FALSE, /* pc_relative */ |
| 227 | 0, /* bitpos */ |
| 228 | complain_overflow_dont, /* complain_on_overflow */ |
| 229 | bfd_elf_generic_reloc, /* special_function */ |
| 230 | "R_VAX_JMP_SLOT", /* name */ |
| 231 | FALSE, /* partial_inplace */ |
| 232 | 0, /* src_mask */ |
| 233 | 0xffffffff, /* dst_mask */ |
| 234 | FALSE), /* pcrel_offset */ |
| 235 | |
| 236 | HOWTO (R_VAX_RELATIVE, /* type */ |
| 237 | 0, /* rightshift */ |
| 238 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 239 | 32, /* bitsize */ |
| 240 | FALSE, /* pc_relative */ |
| 241 | 0, /* bitpos */ |
| 242 | complain_overflow_dont, /* complain_on_overflow */ |
| 243 | bfd_elf_generic_reloc, /* special_function */ |
| 244 | "R_VAX_RELATIVE", /* name */ |
| 245 | FALSE, /* partial_inplace */ |
| 246 | 0, /* src_mask */ |
| 247 | 0xffffffff, /* dst_mask */ |
| 248 | FALSE), /* pcrel_offset */ |
| 249 | |
| 250 | /* GNU extension to record C++ vtable hierarchy */ |
| 251 | HOWTO (R_VAX_GNU_VTINHERIT, /* type */ |
| 252 | 0, /* rightshift */ |
| 253 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 254 | 0, /* bitsize */ |
| 255 | FALSE, /* pc_relative */ |
| 256 | 0, /* bitpos */ |
| 257 | complain_overflow_dont, /* complain_on_overflow */ |
| 258 | NULL, /* special_function */ |
| 259 | "R_VAX_GNU_VTINHERIT", /* name */ |
| 260 | FALSE, /* partial_inplace */ |
| 261 | 0, /* src_mask */ |
| 262 | 0, /* dst_mask */ |
| 263 | FALSE), /* pcrel_offset */ |
| 264 | |
| 265 | /* GNU extension to record C++ vtable member usage */ |
| 266 | HOWTO (R_VAX_GNU_VTENTRY, /* type */ |
| 267 | 0, /* rightshift */ |
| 268 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 269 | 0, /* bitsize */ |
| 270 | FALSE, /* pc_relative */ |
| 271 | 0, /* bitpos */ |
| 272 | complain_overflow_dont, /* complain_on_overflow */ |
| 273 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| 274 | "R_VAX_GNU_VTENTRY", /* name */ |
| 275 | FALSE, /* partial_inplace */ |
| 276 | 0, /* src_mask */ |
| 277 | 0, /* dst_mask */ |
| 278 | FALSE), /* pcrel_offset */ |
| 279 | }; |
| 280 | |
| 281 | static bfd_boolean |
| 282 | rtype_to_howto (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst) |
| 283 | { |
| 284 | unsigned int r_type; |
| 285 | |
| 286 | r_type = ELF32_R_TYPE (dst->r_info); |
| 287 | if (r_type >= R_VAX_max) |
| 288 | { |
| 289 | /* xgettext:c-format */ |
| 290 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| 291 | abfd, r_type); |
| 292 | bfd_set_error (bfd_error_bad_value); |
| 293 | return FALSE; |
| 294 | } |
| 295 | cache_ptr->howto = &howto_table[r_type]; |
| 296 | return TRUE; |
| 297 | } |
| 298 | |
| 299 | #define elf_info_to_howto rtype_to_howto |
| 300 | |
| 301 | static const struct |
| 302 | { |
| 303 | bfd_reloc_code_real_type bfd_val; |
| 304 | int elf_val; |
| 305 | } reloc_map[] = { |
| 306 | { BFD_RELOC_NONE, R_VAX_NONE }, |
| 307 | { BFD_RELOC_32, R_VAX_32 }, |
| 308 | { BFD_RELOC_16, R_VAX_16 }, |
| 309 | { BFD_RELOC_8, R_VAX_8 }, |
| 310 | { BFD_RELOC_32_PCREL, R_VAX_PC32 }, |
| 311 | { BFD_RELOC_16_PCREL, R_VAX_PC16 }, |
| 312 | { BFD_RELOC_8_PCREL, R_VAX_PC8 }, |
| 313 | { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 }, |
| 314 | { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 }, |
| 315 | { BFD_RELOC_NONE, R_VAX_COPY }, |
| 316 | { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT }, |
| 317 | { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT }, |
| 318 | { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE }, |
| 319 | { BFD_RELOC_CTOR, R_VAX_32 }, |
| 320 | { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT }, |
| 321 | { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY }, |
| 322 | }; |
| 323 | |
| 324 | static reloc_howto_type * |
| 325 | reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code) |
| 326 | { |
| 327 | unsigned int i; |
| 328 | for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++) |
| 329 | { |
| 330 | if (reloc_map[i].bfd_val == code) |
| 331 | return &howto_table[reloc_map[i].elf_val]; |
| 332 | } |
| 333 | return 0; |
| 334 | } |
| 335 | |
| 336 | static reloc_howto_type * |
| 337 | reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 338 | const char *r_name) |
| 339 | { |
| 340 | unsigned int i; |
| 341 | |
| 342 | for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++) |
| 343 | if (howto_table[i].name != NULL |
| 344 | && strcasecmp (howto_table[i].name, r_name) == 0) |
| 345 | return &howto_table[i]; |
| 346 | |
| 347 | return NULL; |
| 348 | } |
| 349 | |
| 350 | #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup |
| 351 | #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup |
| 352 | #define ELF_ARCH bfd_arch_vax |
| 353 | /* end code generated by elf.el */ |
| 354 | \f |
| 355 | /* Functions for the VAX ELF linker. */ |
| 356 | |
| 357 | /* The name of the dynamic interpreter. This is put in the .interp |
| 358 | section. */ |
| 359 | |
| 360 | #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so" |
| 361 | |
| 362 | /* The size in bytes of an entry in the procedure linkage table. */ |
| 363 | |
| 364 | #define PLT_ENTRY_SIZE 12 |
| 365 | |
| 366 | /* The first entry in a procedure linkage table looks like this. See |
| 367 | the SVR4 ABI VAX supplement to see how this works. */ |
| 368 | |
| 369 | static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] = |
| 370 | { |
| 371 | 0xdd, 0xef, /* pushl l^ */ |
| 372 | 0, 0, 0, 0, /* offset to .plt.got + 4 */ |
| 373 | 0x17, 0xff, /* jmp @L^(pc) */ |
| 374 | 0, 0, 0, 0, /* offset to .plt.got + 8 */ |
| 375 | }; |
| 376 | |
| 377 | /* Subsequent entries in a procedure linkage table look like this. */ |
| 378 | |
| 379 | static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] = |
| 380 | { |
| 381 | 0xfc, 0x0f, /* .word ^M<r11:r2> */ |
| 382 | 0x16, 0xef, /* jsb L^(pc) */ |
| 383 | 0, 0, 0, 0, /* replaced with offset to start of .plt */ |
| 384 | 0, 0, 0, 0, /* index into .rela.plt */ |
| 385 | }; |
| 386 | |
| 387 | /* The VAX linker needs to keep track of the number of relocs that it |
| 388 | decides to copy in check_relocs for each symbol. This is so that it |
| 389 | can discard PC relative relocs if it doesn't need them when linking |
| 390 | with -Bsymbolic. We store the information in a field extending the |
| 391 | regular ELF linker hash table. */ |
| 392 | |
| 393 | /* This structure keeps track of the number of PC relative relocs we have |
| 394 | copied for a given symbol. */ |
| 395 | |
| 396 | struct elf_vax_pcrel_relocs_copied |
| 397 | { |
| 398 | /* Next section. */ |
| 399 | struct elf_vax_pcrel_relocs_copied *next; |
| 400 | /* A section in dynobj. */ |
| 401 | asection *section; |
| 402 | /* Number of relocs copied in this section. */ |
| 403 | bfd_size_type count; |
| 404 | }; |
| 405 | |
| 406 | /* VAX ELF linker hash entry. */ |
| 407 | |
| 408 | struct elf_vax_link_hash_entry |
| 409 | { |
| 410 | struct elf_link_hash_entry root; |
| 411 | |
| 412 | /* Number of PC relative relocs copied for this symbol. */ |
| 413 | struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied; |
| 414 | |
| 415 | bfd_vma got_addend; |
| 416 | }; |
| 417 | |
| 418 | /* Declare this now that the above structures are defined. */ |
| 419 | |
| 420 | static bfd_boolean elf_vax_discard_copies (struct elf_vax_link_hash_entry *, |
| 421 | void *); |
| 422 | |
| 423 | /* Declare this now that the above structures are defined. */ |
| 424 | |
| 425 | static bfd_boolean elf_vax_instantiate_got_entries (struct elf_link_hash_entry *, |
| 426 | void *); |
| 427 | |
| 428 | /* Traverse an VAX ELF linker hash table. */ |
| 429 | |
| 430 | #define elf_vax_link_hash_traverse(table, func, info) \ |
| 431 | (elf_link_hash_traverse \ |
| 432 | ((table), \ |
| 433 | (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ |
| 434 | (info))) |
| 435 | |
| 436 | /* Create an entry in an VAX ELF linker hash table. */ |
| 437 | |
| 438 | static struct bfd_hash_entry * |
| 439 | elf_vax_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 440 | struct bfd_hash_table *table, |
| 441 | const char *string) |
| 442 | { |
| 443 | struct elf_vax_link_hash_entry *ret = |
| 444 | (struct elf_vax_link_hash_entry *) entry; |
| 445 | |
| 446 | /* Allocate the structure if it has not already been allocated by a |
| 447 | subclass. */ |
| 448 | if (ret == NULL) |
| 449 | ret = ((struct elf_vax_link_hash_entry *) |
| 450 | bfd_hash_allocate (table, |
| 451 | sizeof (struct elf_vax_link_hash_entry))); |
| 452 | if (ret == NULL) |
| 453 | return (struct bfd_hash_entry *) ret; |
| 454 | |
| 455 | /* Call the allocation method of the superclass. */ |
| 456 | ret = ((struct elf_vax_link_hash_entry *) |
| 457 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 458 | table, string)); |
| 459 | if (ret != NULL) |
| 460 | { |
| 461 | ret->pcrel_relocs_copied = NULL; |
| 462 | } |
| 463 | |
| 464 | return (struct bfd_hash_entry *) ret; |
| 465 | } |
| 466 | |
| 467 | /* Create an VAX ELF linker hash table. */ |
| 468 | |
| 469 | static struct bfd_link_hash_table * |
| 470 | elf_vax_link_hash_table_create (bfd *abfd) |
| 471 | { |
| 472 | struct elf_link_hash_table *ret; |
| 473 | size_t amt = sizeof (struct elf_link_hash_table); |
| 474 | |
| 475 | ret = bfd_zmalloc (amt); |
| 476 | if (ret == NULL) |
| 477 | return NULL; |
| 478 | |
| 479 | if (!_bfd_elf_link_hash_table_init (ret, abfd, |
| 480 | elf_vax_link_hash_newfunc, |
| 481 | sizeof (struct elf_vax_link_hash_entry), |
| 482 | GENERIC_ELF_DATA)) |
| 483 | { |
| 484 | free (ret); |
| 485 | return NULL; |
| 486 | } |
| 487 | |
| 488 | return &ret->root; |
| 489 | } |
| 490 | |
| 491 | /* Keep vax-specific flags in the ELF header */ |
| 492 | static bfd_boolean |
| 493 | elf32_vax_set_private_flags (bfd *abfd, flagword flags) |
| 494 | { |
| 495 | elf_elfheader (abfd)->e_flags = flags; |
| 496 | elf_flags_init (abfd) = TRUE; |
| 497 | return TRUE; |
| 498 | } |
| 499 | |
| 500 | /* Merge backend specific data from an object file to the output |
| 501 | object file when linking. */ |
| 502 | static bfd_boolean |
| 503 | elf32_vax_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
| 504 | { |
| 505 | bfd *obfd = info->output_bfd; |
| 506 | flagword in_flags; |
| 507 | |
| 508 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 509 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 510 | return TRUE; |
| 511 | |
| 512 | in_flags = elf_elfheader (ibfd)->e_flags; |
| 513 | |
| 514 | if (!elf_flags_init (obfd)) |
| 515 | { |
| 516 | elf_flags_init (obfd) = TRUE; |
| 517 | elf_elfheader (obfd)->e_flags = in_flags; |
| 518 | } |
| 519 | |
| 520 | return TRUE; |
| 521 | } |
| 522 | |
| 523 | /* Display the flags field */ |
| 524 | static bfd_boolean |
| 525 | elf32_vax_print_private_bfd_data (bfd *abfd, void * ptr) |
| 526 | { |
| 527 | FILE *file = (FILE *) ptr; |
| 528 | |
| 529 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 530 | |
| 531 | /* Print normal ELF private data. */ |
| 532 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 533 | |
| 534 | /* Ignore init flag - it may not be set, despite the flags field containing valid data. */ |
| 535 | |
| 536 | /* xgettext:c-format */ |
| 537 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| 538 | |
| 539 | if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC) |
| 540 | fprintf (file, _(" [nonpic]")); |
| 541 | |
| 542 | if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT) |
| 543 | fprintf (file, _(" [d-float]")); |
| 544 | |
| 545 | if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT) |
| 546 | fprintf (file, _(" [g-float]")); |
| 547 | |
| 548 | fputc ('\n', file); |
| 549 | |
| 550 | return TRUE; |
| 551 | } |
| 552 | /* Look through the relocs for a section during the first phase, and |
| 553 | allocate space in the global offset table or procedure linkage |
| 554 | table. */ |
| 555 | |
| 556 | static bfd_boolean |
| 557 | elf_vax_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec, |
| 558 | const Elf_Internal_Rela *relocs) |
| 559 | { |
| 560 | bfd *dynobj; |
| 561 | Elf_Internal_Shdr *symtab_hdr; |
| 562 | struct elf_link_hash_entry **sym_hashes; |
| 563 | const Elf_Internal_Rela *rel; |
| 564 | const Elf_Internal_Rela *rel_end; |
| 565 | asection *sreloc; |
| 566 | |
| 567 | if (bfd_link_relocatable (info)) |
| 568 | return TRUE; |
| 569 | |
| 570 | dynobj = elf_hash_table (info)->dynobj; |
| 571 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 572 | sym_hashes = elf_sym_hashes (abfd); |
| 573 | |
| 574 | sreloc = NULL; |
| 575 | |
| 576 | rel_end = relocs + sec->reloc_count; |
| 577 | for (rel = relocs; rel < rel_end; rel++) |
| 578 | { |
| 579 | unsigned long r_symndx; |
| 580 | struct elf_link_hash_entry *h; |
| 581 | |
| 582 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 583 | |
| 584 | if (r_symndx < symtab_hdr->sh_info) |
| 585 | h = NULL; |
| 586 | else |
| 587 | { |
| 588 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 589 | while (h->root.type == bfd_link_hash_indirect |
| 590 | || h->root.type == bfd_link_hash_warning) |
| 591 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 592 | } |
| 593 | |
| 594 | switch (ELF32_R_TYPE (rel->r_info)) |
| 595 | { |
| 596 | case R_VAX_GOT32: |
| 597 | BFD_ASSERT (h != NULL); |
| 598 | |
| 599 | /* If this is a local symbol, we resolve it directly without |
| 600 | creating a global offset table entry. */ |
| 601 | if (h->forced_local |
| 602 | || h == elf_hash_table (info)->hgot |
| 603 | || h == elf_hash_table (info)->hplt) |
| 604 | break; |
| 605 | |
| 606 | /* This symbol requires a global offset table entry. */ |
| 607 | |
| 608 | if (dynobj == NULL) |
| 609 | { |
| 610 | /* Create the .got section. */ |
| 611 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 612 | if (!_bfd_elf_create_got_section (dynobj, info)) |
| 613 | return FALSE; |
| 614 | } |
| 615 | |
| 616 | if (h != NULL) |
| 617 | { |
| 618 | struct elf_vax_link_hash_entry *eh; |
| 619 | |
| 620 | eh = (struct elf_vax_link_hash_entry *) h; |
| 621 | if (h->got.refcount == -1) |
| 622 | { |
| 623 | h->got.refcount = 1; |
| 624 | eh->got_addend = rel->r_addend; |
| 625 | } |
| 626 | else |
| 627 | { |
| 628 | h->got.refcount++; |
| 629 | if (eh->got_addend != (bfd_vma) rel->r_addend) |
| 630 | _bfd_error_handler |
| 631 | /* xgettext:c-format */ |
| 632 | (_("%pB: warning: GOT addend of %" PRId64 " to `%s' does" |
| 633 | " not match previous GOT addend of %" PRId64), |
| 634 | abfd, (int64_t) rel->r_addend, h->root.root.string, |
| 635 | (int64_t) eh->got_addend); |
| 636 | |
| 637 | } |
| 638 | } |
| 639 | break; |
| 640 | |
| 641 | case R_VAX_PLT32: |
| 642 | /* This symbol requires a procedure linkage table entry. We |
| 643 | actually build the entry in adjust_dynamic_symbol, |
| 644 | because this might be a case of linking PIC code which is |
| 645 | never referenced by a dynamic object, in which case we |
| 646 | don't need to generate a procedure linkage table entry |
| 647 | after all. */ |
| 648 | BFD_ASSERT (h != NULL); |
| 649 | |
| 650 | /* If this is a local symbol, we resolve it directly without |
| 651 | creating a procedure linkage table entry. */ |
| 652 | if (h->forced_local) |
| 653 | break; |
| 654 | |
| 655 | h->needs_plt = 1; |
| 656 | if (h->plt.refcount == -1) |
| 657 | h->plt.refcount = 1; |
| 658 | else |
| 659 | h->plt.refcount++; |
| 660 | break; |
| 661 | |
| 662 | case R_VAX_PC8: |
| 663 | case R_VAX_PC16: |
| 664 | case R_VAX_PC32: |
| 665 | /* If we are creating a shared library and this is not a local |
| 666 | symbol, we need to copy the reloc into the shared library. |
| 667 | However when linking with -Bsymbolic and this is a global |
| 668 | symbol which is defined in an object we are including in the |
| 669 | link (i.e., DEF_REGULAR is set), then we can resolve the |
| 670 | reloc directly. At this point we have not seen all the input |
| 671 | files, so it is possible that DEF_REGULAR is not set now but |
| 672 | will be set later (it is never cleared). We account for that |
| 673 | possibility below by storing information in the |
| 674 | pcrel_relocs_copied field of the hash table entry. */ |
| 675 | if (!(bfd_link_pic (info) |
| 676 | && (sec->flags & SEC_ALLOC) != 0 |
| 677 | && h != NULL |
| 678 | && (!info->symbolic |
| 679 | || !h->def_regular))) |
| 680 | { |
| 681 | if (h != NULL |
| 682 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 683 | && !h->forced_local) |
| 684 | { |
| 685 | /* Make sure a plt entry is created for this symbol if |
| 686 | it turns out to be a function defined by a dynamic |
| 687 | object. */ |
| 688 | if (h->plt.refcount == -1) |
| 689 | h->plt.refcount = 1; |
| 690 | else |
| 691 | h->plt.refcount++; |
| 692 | } |
| 693 | break; |
| 694 | } |
| 695 | /* If this is a local symbol, we can resolve it directly. */ |
| 696 | if (h != NULL |
| 697 | && (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 698 | || h->forced_local)) |
| 699 | break; |
| 700 | |
| 701 | /* Fall through. */ |
| 702 | case R_VAX_8: |
| 703 | case R_VAX_16: |
| 704 | case R_VAX_32: |
| 705 | if (h != NULL && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
| 706 | { |
| 707 | /* Make sure a plt entry is created for this symbol if it |
| 708 | turns out to be a function defined by a dynamic object. */ |
| 709 | if (h->plt.refcount == -1) |
| 710 | h->plt.refcount = 1; |
| 711 | else |
| 712 | h->plt.refcount++; |
| 713 | } |
| 714 | |
| 715 | /* If we are creating a shared library, we need to copy the |
| 716 | reloc into the shared library. */ |
| 717 | if (bfd_link_pic (info) |
| 718 | && (sec->flags & SEC_ALLOC) != 0) |
| 719 | { |
| 720 | /* When creating a shared object, we must copy these |
| 721 | reloc types into the output file. We create a reloc |
| 722 | section in dynobj and make room for this reloc. */ |
| 723 | if (sreloc == NULL) |
| 724 | { |
| 725 | sreloc = _bfd_elf_make_dynamic_reloc_section |
| 726 | (sec, dynobj, 2, abfd, /*rela?*/ TRUE); |
| 727 | |
| 728 | if (sreloc == NULL) |
| 729 | return FALSE; |
| 730 | |
| 731 | if (sec->flags & SEC_READONLY) |
| 732 | info->flags |= DF_TEXTREL; |
| 733 | } |
| 734 | |
| 735 | sreloc->size += sizeof (Elf32_External_Rela); |
| 736 | |
| 737 | /* If we are linking with -Bsymbolic, we count the number of |
| 738 | PC relative relocations we have entered for this symbol, |
| 739 | so that we can discard them again if the symbol is later |
| 740 | defined by a regular object. Note that this function is |
| 741 | only called if we are using a vaxelf linker hash table, |
| 742 | which means that h is really a pointer to an |
| 743 | elf_vax_link_hash_entry. */ |
| 744 | if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8 |
| 745 | || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16 |
| 746 | || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32) |
| 747 | && info->symbolic) |
| 748 | { |
| 749 | struct elf_vax_link_hash_entry *eh; |
| 750 | struct elf_vax_pcrel_relocs_copied *p; |
| 751 | |
| 752 | eh = (struct elf_vax_link_hash_entry *) h; |
| 753 | |
| 754 | for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) |
| 755 | if (p->section == sreloc) |
| 756 | break; |
| 757 | |
| 758 | if (p == NULL) |
| 759 | { |
| 760 | p = ((struct elf_vax_pcrel_relocs_copied *) |
| 761 | bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); |
| 762 | if (p == NULL) |
| 763 | return FALSE; |
| 764 | p->next = eh->pcrel_relocs_copied; |
| 765 | eh->pcrel_relocs_copied = p; |
| 766 | p->section = sreloc; |
| 767 | p->count = 0; |
| 768 | } |
| 769 | |
| 770 | ++p->count; |
| 771 | } |
| 772 | } |
| 773 | |
| 774 | break; |
| 775 | |
| 776 | /* This relocation describes the C++ object vtable hierarchy. |
| 777 | Reconstruct it for later use during GC. */ |
| 778 | case R_VAX_GNU_VTINHERIT: |
| 779 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 780 | return FALSE; |
| 781 | break; |
| 782 | |
| 783 | /* This relocation describes which C++ vtable entries are actually |
| 784 | used. Record for later use during GC. */ |
| 785 | case R_VAX_GNU_VTENTRY: |
| 786 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 787 | return FALSE; |
| 788 | break; |
| 789 | |
| 790 | default: |
| 791 | break; |
| 792 | } |
| 793 | } |
| 794 | |
| 795 | return TRUE; |
| 796 | } |
| 797 | |
| 798 | /* Return the section that should be marked against GC for a given |
| 799 | relocation. */ |
| 800 | |
| 801 | static asection * |
| 802 | elf_vax_gc_mark_hook (asection *sec, |
| 803 | struct bfd_link_info *info, |
| 804 | Elf_Internal_Rela *rel, |
| 805 | struct elf_link_hash_entry *h, |
| 806 | Elf_Internal_Sym *sym) |
| 807 | { |
| 808 | if (h != NULL) |
| 809 | switch (ELF32_R_TYPE (rel->r_info)) |
| 810 | { |
| 811 | case R_VAX_GNU_VTINHERIT: |
| 812 | case R_VAX_GNU_VTENTRY: |
| 813 | return NULL; |
| 814 | } |
| 815 | |
| 816 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 817 | } |
| 818 | |
| 819 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 820 | regular object. The current definition is in some section of the |
| 821 | dynamic object, but we're not including those sections. We have to |
| 822 | change the definition to something the rest of the link can |
| 823 | understand. */ |
| 824 | |
| 825 | static bfd_boolean |
| 826 | elf_vax_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 827 | struct elf_link_hash_entry *h) |
| 828 | { |
| 829 | bfd *dynobj; |
| 830 | asection *s; |
| 831 | |
| 832 | dynobj = elf_hash_table (info)->dynobj; |
| 833 | |
| 834 | /* Make sure we know what is going on here. */ |
| 835 | BFD_ASSERT (dynobj != NULL |
| 836 | && (h->needs_plt |
| 837 | || h->is_weakalias |
| 838 | || (h->def_dynamic |
| 839 | && h->ref_regular |
| 840 | && !h->def_regular))); |
| 841 | |
| 842 | /* If this is a function, put it in the procedure linkage table. We |
| 843 | will fill in the contents of the procedure linkage table later, |
| 844 | when we know the address of the .got section. */ |
| 845 | if (h->type == STT_FUNC |
| 846 | || h->needs_plt) |
| 847 | { |
| 848 | if (h->plt.refcount <= 0 |
| 849 | || SYMBOL_CALLS_LOCAL (info, h) |
| 850 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 851 | && h->root.type == bfd_link_hash_undefweak)) |
| 852 | { |
| 853 | /* This case can occur if we saw a PLTxx reloc in an input |
| 854 | file, but the symbol was never referred to by a dynamic |
| 855 | object, or if all references were garbage collected. In |
| 856 | such a case, we don't actually need to build a procedure |
| 857 | linkage table, and we can just do a PCxx reloc instead. */ |
| 858 | h->plt.offset = (bfd_vma) -1; |
| 859 | h->needs_plt = 0; |
| 860 | return TRUE; |
| 861 | } |
| 862 | |
| 863 | s = elf_hash_table (info)->splt; |
| 864 | BFD_ASSERT (s != NULL); |
| 865 | |
| 866 | /* If this is the first .plt entry, make room for the special |
| 867 | first entry. */ |
| 868 | if (s->size == 0) |
| 869 | { |
| 870 | s->size += PLT_ENTRY_SIZE; |
| 871 | } |
| 872 | |
| 873 | /* If this symbol is not defined in a regular file, and we are |
| 874 | not generating a shared library, then set the symbol to this |
| 875 | location in the .plt. This is required to make function |
| 876 | pointers compare as equal between the normal executable and |
| 877 | the shared library. */ |
| 878 | if (!bfd_link_pic (info) |
| 879 | && !h->def_regular) |
| 880 | { |
| 881 | h->root.u.def.section = s; |
| 882 | h->root.u.def.value = s->size; |
| 883 | } |
| 884 | |
| 885 | h->plt.offset = s->size; |
| 886 | |
| 887 | /* Make room for this entry. */ |
| 888 | s->size += PLT_ENTRY_SIZE; |
| 889 | |
| 890 | /* We also need to make an entry in the .got.plt section, which |
| 891 | will be placed in the .got section by the linker script. */ |
| 892 | |
| 893 | s = elf_hash_table (info)->sgotplt; |
| 894 | BFD_ASSERT (s != NULL); |
| 895 | s->size += 4; |
| 896 | |
| 897 | /* We also need to make an entry in the .rela.plt section. */ |
| 898 | |
| 899 | s = elf_hash_table (info)->srelplt; |
| 900 | BFD_ASSERT (s != NULL); |
| 901 | s->size += sizeof (Elf32_External_Rela); |
| 902 | |
| 903 | return TRUE; |
| 904 | } |
| 905 | |
| 906 | /* Reinitialize the plt offset now that it is not used as a reference |
| 907 | count any more. */ |
| 908 | h->plt.offset = (bfd_vma) -1; |
| 909 | |
| 910 | /* If this is a weak symbol, and there is a real definition, the |
| 911 | processor independent code will have arranged for us to see the |
| 912 | real definition first, and we can just use the same value. */ |
| 913 | if (h->is_weakalias) |
| 914 | { |
| 915 | struct elf_link_hash_entry *def = weakdef (h); |
| 916 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
| 917 | h->root.u.def.section = def->root.u.def.section; |
| 918 | h->root.u.def.value = def->root.u.def.value; |
| 919 | return TRUE; |
| 920 | } |
| 921 | |
| 922 | /* This is a reference to a symbol defined by a dynamic object which |
| 923 | is not a function. */ |
| 924 | |
| 925 | /* If we are creating a shared library, we must presume that the |
| 926 | only references to the symbol are via the global offset table. |
| 927 | For such cases we need not do anything here; the relocations will |
| 928 | be handled correctly by relocate_section. */ |
| 929 | if (bfd_link_pic (info)) |
| 930 | return TRUE; |
| 931 | |
| 932 | /* We must allocate the symbol in our .dynbss section, which will |
| 933 | become part of the .bss section of the executable. There will be |
| 934 | an entry for this symbol in the .dynsym section. The dynamic |
| 935 | object will contain position independent code, so all references |
| 936 | from the dynamic object to this symbol will go through the global |
| 937 | offset table. The dynamic linker will use the .dynsym entry to |
| 938 | determine the address it must put in the global offset table, so |
| 939 | both the dynamic object and the regular object will refer to the |
| 940 | same memory location for the variable. */ |
| 941 | |
| 942 | s = bfd_get_linker_section (dynobj, ".dynbss"); |
| 943 | BFD_ASSERT (s != NULL); |
| 944 | |
| 945 | /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to |
| 946 | copy the initial value out of the dynamic object and into the |
| 947 | runtime process image. We need to remember the offset into the |
| 948 | .rela.bss section we are going to use. */ |
| 949 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
| 950 | { |
| 951 | asection *srel; |
| 952 | |
| 953 | srel = bfd_get_linker_section (dynobj, ".rela.bss"); |
| 954 | BFD_ASSERT (srel != NULL); |
| 955 | srel->size += sizeof (Elf32_External_Rela); |
| 956 | h->needs_copy = 1; |
| 957 | } |
| 958 | |
| 959 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
| 960 | } |
| 961 | |
| 962 | /* This function is called via elf_link_hash_traverse. It resets GOT |
| 963 | and PLT (.GOT) reference counts back to -1 so normal PC32 relocation |
| 964 | will be done. */ |
| 965 | |
| 966 | static bfd_boolean |
| 967 | elf_vax_discard_got_entries (struct elf_link_hash_entry *h, |
| 968 | void *infoptr ATTRIBUTE_UNUSED) |
| 969 | { |
| 970 | h->got.refcount = -1; |
| 971 | h->plt.refcount = -1; |
| 972 | |
| 973 | return TRUE; |
| 974 | } |
| 975 | |
| 976 | /* Discard unused dynamic data if this is a static link. */ |
| 977 | |
| 978 | static bfd_boolean |
| 979 | elf_vax_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 980 | struct bfd_link_info *info) |
| 981 | { |
| 982 | bfd *dynobj; |
| 983 | asection *s; |
| 984 | |
| 985 | dynobj = elf_hash_table (info)->dynobj; |
| 986 | |
| 987 | if (dynobj && !elf_hash_table (info)->dynamic_sections_created) |
| 988 | { |
| 989 | /* We may have created entries in the .rela.got and .got sections. |
| 990 | However, if we are not creating the dynamic sections, we will |
| 991 | not actually use these entries. Reset the size of .rela.got |
| 992 | and .got, which will cause them to get stripped from the output |
| 993 | file below. */ |
| 994 | s = elf_hash_table (info)->srelgot; |
| 995 | if (s != NULL) |
| 996 | s->size = 0; |
| 997 | s = elf_hash_table (info)->sgotplt; |
| 998 | if (s != NULL) |
| 999 | s->size = 0; |
| 1000 | s = elf_hash_table (info)->sgot; |
| 1001 | if (s != NULL) |
| 1002 | s->size = 0; |
| 1003 | } |
| 1004 | |
| 1005 | /* If this is a static link, we need to discard all the got entries we've |
| 1006 | recorded. */ |
| 1007 | if (!dynobj || !elf_hash_table (info)->dynamic_sections_created) |
| 1008 | elf_link_hash_traverse (elf_hash_table (info), |
| 1009 | elf_vax_discard_got_entries, |
| 1010 | info); |
| 1011 | |
| 1012 | return TRUE; |
| 1013 | } |
| 1014 | |
| 1015 | /* Set the sizes of the dynamic sections. */ |
| 1016 | |
| 1017 | static bfd_boolean |
| 1018 | elf_vax_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
| 1019 | { |
| 1020 | bfd *dynobj; |
| 1021 | asection *s; |
| 1022 | bfd_boolean plt; |
| 1023 | bfd_boolean relocs; |
| 1024 | bfd_boolean reltext; |
| 1025 | |
| 1026 | dynobj = elf_hash_table (info)->dynobj; |
| 1027 | BFD_ASSERT (dynobj != NULL); |
| 1028 | |
| 1029 | if (elf_hash_table (info)->dynamic_sections_created) |
| 1030 | { |
| 1031 | /* Set the contents of the .interp section to the interpreter. */ |
| 1032 | if (bfd_link_executable (info) && !info->nointerp) |
| 1033 | { |
| 1034 | s = bfd_get_linker_section (dynobj, ".interp"); |
| 1035 | BFD_ASSERT (s != NULL); |
| 1036 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 1037 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 1038 | } |
| 1039 | } |
| 1040 | |
| 1041 | /* If this is a -Bsymbolic shared link, then we need to discard all PC |
| 1042 | relative relocs against symbols defined in a regular object. We |
| 1043 | allocated space for them in the check_relocs routine, but we will not |
| 1044 | fill them in in the relocate_section routine. */ |
| 1045 | if (bfd_link_pic (info) && info->symbolic) |
| 1046 | elf_vax_link_hash_traverse (elf_hash_table (info), |
| 1047 | elf_vax_discard_copies, |
| 1048 | NULL); |
| 1049 | |
| 1050 | /* If this is a -Bsymbolic shared link, we need to discard all the got |
| 1051 | entries we've recorded. Otherwise, we need to instantiate (allocate |
| 1052 | space for them). */ |
| 1053 | elf_link_hash_traverse (elf_hash_table (info), |
| 1054 | elf_vax_instantiate_got_entries, |
| 1055 | info); |
| 1056 | |
| 1057 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 1058 | determined the sizes of the various dynamic sections. Allocate |
| 1059 | memory for them. */ |
| 1060 | plt = FALSE; |
| 1061 | relocs = FALSE; |
| 1062 | reltext = FALSE; |
| 1063 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 1064 | { |
| 1065 | const char *name; |
| 1066 | |
| 1067 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 1068 | continue; |
| 1069 | |
| 1070 | /* It's OK to base decisions on the section name, because none |
| 1071 | of the dynobj section names depend upon the input files. */ |
| 1072 | name = bfd_section_name (s); |
| 1073 | |
| 1074 | if (strcmp (name, ".plt") == 0) |
| 1075 | { |
| 1076 | /* Remember whether there is a PLT. */ |
| 1077 | plt = s->size != 0; |
| 1078 | } |
| 1079 | else if (CONST_STRNEQ (name, ".rela")) |
| 1080 | { |
| 1081 | if (s->size != 0) |
| 1082 | { |
| 1083 | asection *target; |
| 1084 | |
| 1085 | /* Remember whether there are any reloc sections other |
| 1086 | than .rela.plt. */ |
| 1087 | if (strcmp (name, ".rela.plt") != 0) |
| 1088 | { |
| 1089 | const char *outname; |
| 1090 | |
| 1091 | relocs = TRUE; |
| 1092 | |
| 1093 | /* If this relocation section applies to a read only |
| 1094 | section, then we probably need a DT_TEXTREL |
| 1095 | entry. .rela.plt is actually associated with |
| 1096 | .got.plt, which is never readonly. */ |
| 1097 | outname = bfd_section_name (s->output_section); |
| 1098 | target = bfd_get_section_by_name (output_bfd, outname + 5); |
| 1099 | if (target != NULL |
| 1100 | && (target->flags & SEC_READONLY) != 0 |
| 1101 | && (target->flags & SEC_ALLOC) != 0) |
| 1102 | reltext = TRUE; |
| 1103 | } |
| 1104 | |
| 1105 | /* We use the reloc_count field as a counter if we need |
| 1106 | to copy relocs into the output file. */ |
| 1107 | s->reloc_count = 0; |
| 1108 | } |
| 1109 | } |
| 1110 | else if (! CONST_STRNEQ (name, ".got") |
| 1111 | && strcmp (name, ".dynbss") != 0) |
| 1112 | { |
| 1113 | /* It's not one of our sections, so don't allocate space. */ |
| 1114 | continue; |
| 1115 | } |
| 1116 | |
| 1117 | if (s->size == 0) |
| 1118 | { |
| 1119 | /* If we don't need this section, strip it from the |
| 1120 | output file. This is mostly to handle .rela.bss and |
| 1121 | .rela.plt. We must create both sections in |
| 1122 | create_dynamic_sections, because they must be created |
| 1123 | before the linker maps input sections to output |
| 1124 | sections. The linker does that before |
| 1125 | adjust_dynamic_symbol is called, and it is that |
| 1126 | function which decides whether anything needs to go |
| 1127 | into these sections. */ |
| 1128 | s->flags |= SEC_EXCLUDE; |
| 1129 | continue; |
| 1130 | } |
| 1131 | |
| 1132 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 1133 | continue; |
| 1134 | |
| 1135 | /* Allocate memory for the section contents. */ |
| 1136 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| 1137 | if (s->contents == NULL) |
| 1138 | return FALSE; |
| 1139 | } |
| 1140 | |
| 1141 | if (elf_hash_table (info)->dynamic_sections_created) |
| 1142 | { |
| 1143 | /* Add some entries to the .dynamic section. We fill in the |
| 1144 | values later, in elf_vax_finish_dynamic_sections, but we |
| 1145 | must add the entries now so that we get the correct size for |
| 1146 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 1147 | dynamic linker and used by the debugger. */ |
| 1148 | #define add_dynamic_entry(TAG, VAL) \ |
| 1149 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 1150 | |
| 1151 | if (!bfd_link_pic (info)) |
| 1152 | { |
| 1153 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 1154 | return FALSE; |
| 1155 | } |
| 1156 | |
| 1157 | if (plt) |
| 1158 | { |
| 1159 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 1160 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 1161 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 1162 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 1163 | return FALSE; |
| 1164 | } |
| 1165 | |
| 1166 | if (relocs) |
| 1167 | { |
| 1168 | if (!add_dynamic_entry (DT_RELA, 0) |
| 1169 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 1170 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) |
| 1171 | return FALSE; |
| 1172 | } |
| 1173 | |
| 1174 | if (reltext || (info->flags & DF_TEXTREL) != 0) |
| 1175 | { |
| 1176 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 1177 | return FALSE; |
| 1178 | } |
| 1179 | } |
| 1180 | #undef add_dynamic_entry |
| 1181 | |
| 1182 | return TRUE; |
| 1183 | } |
| 1184 | |
| 1185 | /* This function is called via elf_vax_link_hash_traverse if we are |
| 1186 | creating a shared object with -Bsymbolic. It discards the space |
| 1187 | allocated to copy PC relative relocs against symbols which are defined |
| 1188 | in regular objects. We allocated space for them in the check_relocs |
| 1189 | routine, but we won't fill them in in the relocate_section routine. */ |
| 1190 | |
| 1191 | static bfd_boolean |
| 1192 | elf_vax_discard_copies (struct elf_vax_link_hash_entry *h, |
| 1193 | void * ignore ATTRIBUTE_UNUSED) |
| 1194 | { |
| 1195 | struct elf_vax_pcrel_relocs_copied *s; |
| 1196 | |
| 1197 | /* We only discard relocs for symbols defined in a regular object. */ |
| 1198 | if (!h->root.def_regular) |
| 1199 | return TRUE; |
| 1200 | |
| 1201 | for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) |
| 1202 | s->section->size -= s->count * sizeof (Elf32_External_Rela); |
| 1203 | |
| 1204 | return TRUE; |
| 1205 | } |
| 1206 | |
| 1207 | /* This function is called via elf_link_hash_traverse. It looks for |
| 1208 | entries that have GOT or PLT (.GOT) references. If creating a shared |
| 1209 | object with -Bsymbolic, or the symbol has been forced local, then it |
| 1210 | resets the reference count back to -1 so normal PC32 relocation will |
| 1211 | be done. Otherwise space in the .got and .rela.got will be reserved |
| 1212 | for the symbol. */ |
| 1213 | |
| 1214 | static bfd_boolean |
| 1215 | elf_vax_instantiate_got_entries (struct elf_link_hash_entry *h, void * infoptr) |
| 1216 | { |
| 1217 | struct bfd_link_info *info = (struct bfd_link_info *) infoptr; |
| 1218 | bfd *dynobj; |
| 1219 | asection *sgot; |
| 1220 | asection *srelgot; |
| 1221 | |
| 1222 | /* We don't care about non-GOT (and non-PLT) entries. */ |
| 1223 | if (h->got.refcount <= 0 && h->plt.refcount <= 0) |
| 1224 | return TRUE; |
| 1225 | |
| 1226 | dynobj = elf_hash_table (info)->dynobj; |
| 1227 | BFD_ASSERT (dynobj != NULL); |
| 1228 | |
| 1229 | sgot = elf_hash_table (info)->sgot; |
| 1230 | srelgot = elf_hash_table (info)->srelgot; |
| 1231 | |
| 1232 | if (SYMBOL_REFERENCES_LOCAL (info, h)) |
| 1233 | { |
| 1234 | h->got.refcount = -1; |
| 1235 | h->plt.refcount = -1; |
| 1236 | } |
| 1237 | else if (h->got.refcount > 0) |
| 1238 | { |
| 1239 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 1240 | if (h->dynindx == -1) |
| 1241 | { |
| 1242 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1243 | return FALSE; |
| 1244 | } |
| 1245 | |
| 1246 | /* Allocate space in the .got and .rela.got sections. */ |
| 1247 | sgot->size += 4; |
| 1248 | srelgot->size += sizeof (Elf32_External_Rela); |
| 1249 | } |
| 1250 | |
| 1251 | return TRUE; |
| 1252 | } |
| 1253 | |
| 1254 | /* Relocate an VAX ELF section. */ |
| 1255 | |
| 1256 | static bfd_boolean |
| 1257 | elf_vax_relocate_section (bfd *output_bfd, |
| 1258 | struct bfd_link_info *info, |
| 1259 | bfd *input_bfd, |
| 1260 | asection *input_section, |
| 1261 | bfd_byte *contents, |
| 1262 | Elf_Internal_Rela *relocs, |
| 1263 | Elf_Internal_Sym *local_syms, |
| 1264 | asection **local_sections) |
| 1265 | { |
| 1266 | Elf_Internal_Shdr *symtab_hdr; |
| 1267 | struct elf_link_hash_entry **sym_hashes; |
| 1268 | bfd_vma plt_index; |
| 1269 | bfd_vma got_offset; |
| 1270 | asection *sgot; |
| 1271 | asection *splt; |
| 1272 | asection *sgotplt; |
| 1273 | asection *sreloc; |
| 1274 | Elf_Internal_Rela *rel; |
| 1275 | Elf_Internal_Rela *relend; |
| 1276 | |
| 1277 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1278 | sym_hashes = elf_sym_hashes (input_bfd); |
| 1279 | |
| 1280 | sgot = NULL; |
| 1281 | splt = NULL; |
| 1282 | sgotplt = NULL; |
| 1283 | sreloc = NULL; |
| 1284 | |
| 1285 | rel = relocs; |
| 1286 | relend = relocs + input_section->reloc_count; |
| 1287 | for (; rel < relend; rel++) |
| 1288 | { |
| 1289 | int r_type; |
| 1290 | reloc_howto_type *howto; |
| 1291 | unsigned long r_symndx; |
| 1292 | struct elf_link_hash_entry *h; |
| 1293 | Elf_Internal_Sym *sym; |
| 1294 | asection *sec; |
| 1295 | bfd_vma relocation; |
| 1296 | bfd_reloc_status_type r; |
| 1297 | |
| 1298 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1299 | if (r_type < 0 || r_type >= (int) R_VAX_max) |
| 1300 | { |
| 1301 | bfd_set_error (bfd_error_bad_value); |
| 1302 | return FALSE; |
| 1303 | } |
| 1304 | howto = howto_table + r_type; |
| 1305 | |
| 1306 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1307 | h = NULL; |
| 1308 | sym = NULL; |
| 1309 | sec = NULL; |
| 1310 | if (r_symndx < symtab_hdr->sh_info) |
| 1311 | { |
| 1312 | sym = local_syms + r_symndx; |
| 1313 | sec = local_sections[r_symndx]; |
| 1314 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 1315 | } |
| 1316 | else |
| 1317 | { |
| 1318 | bfd_boolean unresolved_reloc; |
| 1319 | bfd_boolean warned, ignored; |
| 1320 | |
| 1321 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 1322 | r_symndx, symtab_hdr, sym_hashes, |
| 1323 | h, sec, relocation, |
| 1324 | unresolved_reloc, warned, ignored); |
| 1325 | |
| 1326 | if ((h->root.type == bfd_link_hash_defined |
| 1327 | || h->root.type == bfd_link_hash_defweak) |
| 1328 | && ((r_type == R_VAX_PLT32 |
| 1329 | && h->plt.offset != (bfd_vma) -1 |
| 1330 | && !h->forced_local |
| 1331 | && elf_hash_table (info)->dynamic_sections_created) |
| 1332 | || (r_type == R_VAX_GOT32 |
| 1333 | && h->got.offset != (bfd_vma) -1 |
| 1334 | && !h->forced_local |
| 1335 | && elf_hash_table (info)->dynamic_sections_created |
| 1336 | && (! bfd_link_pic (info) |
| 1337 | || (! info->symbolic && h->dynindx != -1) |
| 1338 | || !h->def_regular)) |
| 1339 | || (bfd_link_pic (info) |
| 1340 | && ((! info->symbolic && h->dynindx != -1) |
| 1341 | || !h->def_regular) |
| 1342 | && ((input_section->flags & SEC_ALLOC) != 0 |
| 1343 | /* DWARF will emit R_VAX_32 relocations in its |
| 1344 | sections against symbols defined externally |
| 1345 | in shared libraries. We can't do anything |
| 1346 | with them here. */ |
| 1347 | |
| 1348 | || ((input_section->flags & SEC_DEBUGGING) != 0 |
| 1349 | && h->def_dynamic)) |
| 1350 | && (r_type == R_VAX_8 |
| 1351 | || r_type == R_VAX_16 |
| 1352 | || r_type == R_VAX_32)))) |
| 1353 | /* In these cases, we don't need the relocation |
| 1354 | value. We check specially because in some |
| 1355 | obscure cases sec->output_section will be NULL. */ |
| 1356 | relocation = 0; |
| 1357 | } |
| 1358 | |
| 1359 | if (sec != NULL && discarded_section (sec)) |
| 1360 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 1361 | rel, 1, relend, howto, 0, contents); |
| 1362 | |
| 1363 | if (bfd_link_relocatable (info)) |
| 1364 | continue; |
| 1365 | |
| 1366 | switch (r_type) |
| 1367 | { |
| 1368 | case R_VAX_GOT32: |
| 1369 | /* Relocation is to the address of the entry for this symbol |
| 1370 | in the global offset table. */ |
| 1371 | |
| 1372 | /* Resolve a GOTxx reloc against a local symbol directly, |
| 1373 | without using the global offset table. */ |
| 1374 | if (h == NULL |
| 1375 | || h->got.offset == (bfd_vma) -1) |
| 1376 | break; |
| 1377 | |
| 1378 | { |
| 1379 | bfd_vma off; |
| 1380 | |
| 1381 | sgot = elf_hash_table (info)->sgot; |
| 1382 | BFD_ASSERT (sgot != NULL); |
| 1383 | |
| 1384 | off = h->got.offset; |
| 1385 | BFD_ASSERT (off < sgot->size); |
| 1386 | |
| 1387 | bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off); |
| 1388 | |
| 1389 | relocation = sgot->output_offset + off; |
| 1390 | /* The GOT relocation uses the addend. */ |
| 1391 | rel->r_addend = 0; |
| 1392 | |
| 1393 | /* Change the reference to be indirect. */ |
| 1394 | contents[rel->r_offset - 1] |= 0x10; |
| 1395 | relocation += sgot->output_section->vma; |
| 1396 | } |
| 1397 | break; |
| 1398 | |
| 1399 | case R_VAX_PC32: |
| 1400 | /* If we are creating an executable and the function this |
| 1401 | reloc refers to is in a shared lib, then we made a PLT |
| 1402 | entry for this symbol and need to handle the reloc like |
| 1403 | a PLT reloc. */ |
| 1404 | if (bfd_link_pic (info)) |
| 1405 | goto r_vax_pc32_shared; |
| 1406 | /* Fall through. */ |
| 1407 | case R_VAX_PLT32: |
| 1408 | /* Relocation is to the entry for this symbol in the |
| 1409 | procedure linkage table. */ |
| 1410 | |
| 1411 | /* Resolve a PLTxx reloc against a local symbol directly, |
| 1412 | without using the procedure linkage table. */ |
| 1413 | if (h == NULL |
| 1414 | || h->plt.offset == (bfd_vma) -1) |
| 1415 | break; |
| 1416 | |
| 1417 | splt = elf_hash_table (info)->splt; |
| 1418 | BFD_ASSERT (splt != NULL); |
| 1419 | |
| 1420 | sgotplt = elf_hash_table (info)->sgotplt; |
| 1421 | BFD_ASSERT (sgotplt != NULL); |
| 1422 | |
| 1423 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; |
| 1424 | |
| 1425 | /* Get the offset into the .got table of the entry that |
| 1426 | corresponds to this function. Each .got entry is 4 bytes. |
| 1427 | The first two are reserved. */ |
| 1428 | got_offset = (plt_index + 3) * 4; |
| 1429 | |
| 1430 | /* We want the relocation to point into the .got.plt instead |
| 1431 | of the plt itself. */ |
| 1432 | relocation = (sgotplt->output_section->vma |
| 1433 | + sgotplt->output_offset |
| 1434 | + got_offset); |
| 1435 | contents[rel->r_offset-1] |= 0x10; /* make indirect */ |
| 1436 | if (rel->r_addend == 2) |
| 1437 | { |
| 1438 | h->plt.offset |= 1; |
| 1439 | } |
| 1440 | else if (rel->r_addend != 0) |
| 1441 | _bfd_error_handler |
| 1442 | /* xgettext:c-format */ |
| 1443 | (_("%pB: warning: PLT addend of %" PRId64 " to `%s'" |
| 1444 | " from %pA section ignored"), |
| 1445 | input_bfd, (int64_t) rel->r_addend, h->root.root.string, |
| 1446 | input_section); |
| 1447 | rel->r_addend = 0; |
| 1448 | |
| 1449 | break; |
| 1450 | |
| 1451 | case R_VAX_PC8: |
| 1452 | case R_VAX_PC16: |
| 1453 | r_vax_pc32_shared: |
| 1454 | if (h == NULL |
| 1455 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 1456 | || h->forced_local) |
| 1457 | break; |
| 1458 | /* Fall through. */ |
| 1459 | case R_VAX_8: |
| 1460 | case R_VAX_16: |
| 1461 | case R_VAX_32: |
| 1462 | if (bfd_link_pic (info) |
| 1463 | && r_symndx != STN_UNDEF |
| 1464 | && (input_section->flags & SEC_ALLOC) != 0 |
| 1465 | && ((r_type != R_VAX_PC8 |
| 1466 | && r_type != R_VAX_PC16 |
| 1467 | && r_type != R_VAX_PC32) |
| 1468 | || ((input_section->flags & SEC_CODE) |
| 1469 | && (!info->symbolic |
| 1470 | || (!h->def_regular && h->type != STT_SECTION))))) |
| 1471 | { |
| 1472 | Elf_Internal_Rela outrel; |
| 1473 | bfd_byte *loc; |
| 1474 | bfd_boolean skip, relocate; |
| 1475 | |
| 1476 | /* When generating a shared object, these relocations |
| 1477 | are copied into the output file to be resolved at run |
| 1478 | time. */ |
| 1479 | if (sreloc == NULL) |
| 1480 | { |
| 1481 | sreloc = _bfd_elf_get_dynamic_reloc_section |
| 1482 | (input_bfd, input_section, /*rela?*/ TRUE); |
| 1483 | if (sreloc == NULL) |
| 1484 | return FALSE; |
| 1485 | } |
| 1486 | |
| 1487 | skip = FALSE; |
| 1488 | relocate = FALSE; |
| 1489 | |
| 1490 | outrel.r_offset = |
| 1491 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 1492 | rel->r_offset); |
| 1493 | if (outrel.r_offset == (bfd_vma) -1) |
| 1494 | skip = TRUE; |
| 1495 | if (outrel.r_offset == (bfd_vma) -2) |
| 1496 | skip = TRUE, relocate = TRUE; |
| 1497 | outrel.r_offset += (input_section->output_section->vma |
| 1498 | + input_section->output_offset); |
| 1499 | |
| 1500 | if (skip) |
| 1501 | memset (&outrel, 0, sizeof outrel); |
| 1502 | /* h->dynindx may be -1 if the symbol was marked to |
| 1503 | become local. */ |
| 1504 | else if (h != NULL |
| 1505 | && ((! info->symbolic && h->dynindx != -1) |
| 1506 | || !h->def_regular)) |
| 1507 | { |
| 1508 | BFD_ASSERT (h->dynindx != -1); |
| 1509 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 1510 | outrel.r_addend = relocation + rel->r_addend; |
| 1511 | } |
| 1512 | else |
| 1513 | { |
| 1514 | if (r_type == R_VAX_32) |
| 1515 | { |
| 1516 | relocate = TRUE; |
| 1517 | outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE); |
| 1518 | BFD_ASSERT (bfd_get_signed_32 (input_bfd, |
| 1519 | &contents[rel->r_offset]) == 0); |
| 1520 | outrel.r_addend = relocation + rel->r_addend; |
| 1521 | } |
| 1522 | else |
| 1523 | { |
| 1524 | long indx; |
| 1525 | |
| 1526 | if (bfd_is_abs_section (sec)) |
| 1527 | indx = 0; |
| 1528 | else if (sec == NULL || sec->owner == NULL) |
| 1529 | { |
| 1530 | bfd_set_error (bfd_error_bad_value); |
| 1531 | return FALSE; |
| 1532 | } |
| 1533 | else |
| 1534 | { |
| 1535 | asection *osec; |
| 1536 | |
| 1537 | /* We are turning this relocation into one |
| 1538 | against a section symbol. It would be |
| 1539 | proper to subtract the symbol's value, |
| 1540 | osec->vma, from the emitted reloc addend, |
| 1541 | but ld.so expects buggy relocs. */ |
| 1542 | osec = sec->output_section; |
| 1543 | indx = elf_section_data (osec)->dynindx; |
| 1544 | if (indx == 0) |
| 1545 | { |
| 1546 | struct elf_link_hash_table *htab; |
| 1547 | htab = elf_hash_table (info); |
| 1548 | osec = htab->text_index_section; |
| 1549 | indx = elf_section_data (osec)->dynindx; |
| 1550 | } |
| 1551 | BFD_ASSERT (indx != 0); |
| 1552 | } |
| 1553 | |
| 1554 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
| 1555 | outrel.r_addend = relocation + rel->r_addend; |
| 1556 | } |
| 1557 | } |
| 1558 | |
| 1559 | if ((input_section->flags & SEC_CODE) != 0 |
| 1560 | || (ELF32_R_TYPE (outrel.r_info) != R_VAX_32 |
| 1561 | && ELF32_R_TYPE (outrel.r_info) != R_VAX_RELATIVE |
| 1562 | && ELF32_R_TYPE (outrel.r_info) != R_VAX_COPY |
| 1563 | && ELF32_R_TYPE (outrel.r_info) != R_VAX_JMP_SLOT |
| 1564 | && ELF32_R_TYPE (outrel.r_info) != R_VAX_GLOB_DAT)) |
| 1565 | { |
| 1566 | if (h != NULL) |
| 1567 | _bfd_error_handler |
| 1568 | /* xgettext:c-format */ |
| 1569 | (_("%pB: warning: %s relocation against symbol `%s'" |
| 1570 | " from %pA section"), |
| 1571 | input_bfd, howto->name, h->root.root.string, |
| 1572 | input_section); |
| 1573 | else |
| 1574 | _bfd_error_handler |
| 1575 | /* xgettext:c-format */ |
| 1576 | (_("%pB: warning: %s relocation to %#" PRIx64 |
| 1577 | " from %pA section"), |
| 1578 | input_bfd, howto->name, (uint64_t) outrel.r_addend, |
| 1579 | input_section); |
| 1580 | } |
| 1581 | loc = sreloc->contents; |
| 1582 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); |
| 1583 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 1584 | |
| 1585 | /* This reloc will be computed at runtime, so there's no |
| 1586 | need to do anything now, except for R_VAX_32 |
| 1587 | relocations that have been turned into |
| 1588 | R_VAX_RELATIVE. */ |
| 1589 | if (!relocate) |
| 1590 | continue; |
| 1591 | } |
| 1592 | |
| 1593 | break; |
| 1594 | |
| 1595 | case R_VAX_GNU_VTINHERIT: |
| 1596 | case R_VAX_GNU_VTENTRY: |
| 1597 | /* These are no-ops in the end. */ |
| 1598 | continue; |
| 1599 | |
| 1600 | default: |
| 1601 | break; |
| 1602 | } |
| 1603 | |
| 1604 | /* VAX PCREL relocations are from the end of relocation, not the start. |
| 1605 | So subtract the difference from the relocation amount since we can't |
| 1606 | add it to the offset. */ |
| 1607 | if (howto->pc_relative && howto->pcrel_offset) |
| 1608 | relocation -= bfd_get_reloc_size(howto); |
| 1609 | |
| 1610 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 1611 | contents, rel->r_offset, |
| 1612 | relocation, rel->r_addend); |
| 1613 | |
| 1614 | if (r != bfd_reloc_ok) |
| 1615 | { |
| 1616 | switch (r) |
| 1617 | { |
| 1618 | default: |
| 1619 | case bfd_reloc_outofrange: |
| 1620 | abort (); |
| 1621 | case bfd_reloc_overflow: |
| 1622 | { |
| 1623 | const char *name; |
| 1624 | |
| 1625 | if (h != NULL) |
| 1626 | name = NULL; |
| 1627 | else |
| 1628 | { |
| 1629 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 1630 | symtab_hdr->sh_link, |
| 1631 | sym->st_name); |
| 1632 | if (name == NULL) |
| 1633 | return FALSE; |
| 1634 | if (*name == '\0') |
| 1635 | name = bfd_section_name (sec); |
| 1636 | } |
| 1637 | info->callbacks->reloc_overflow |
| 1638 | (info, (h ? &h->root : NULL), name, howto->name, |
| 1639 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); |
| 1640 | } |
| 1641 | break; |
| 1642 | } |
| 1643 | } |
| 1644 | } |
| 1645 | |
| 1646 | return TRUE; |
| 1647 | } |
| 1648 | |
| 1649 | /* Finish up dynamic symbol handling. We set the contents of various |
| 1650 | dynamic sections here. */ |
| 1651 | |
| 1652 | static bfd_boolean |
| 1653 | elf_vax_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info, |
| 1654 | struct elf_link_hash_entry *h, |
| 1655 | Elf_Internal_Sym *sym) |
| 1656 | { |
| 1657 | bfd *dynobj; |
| 1658 | |
| 1659 | dynobj = elf_hash_table (info)->dynobj; |
| 1660 | |
| 1661 | if (h->plt.offset != (bfd_vma) -1) |
| 1662 | { |
| 1663 | asection *splt; |
| 1664 | asection *sgot; |
| 1665 | asection *srela; |
| 1666 | bfd_vma plt_index; |
| 1667 | bfd_vma got_offset; |
| 1668 | bfd_vma addend; |
| 1669 | Elf_Internal_Rela rela; |
| 1670 | bfd_byte *loc; |
| 1671 | |
| 1672 | /* This symbol has an entry in the procedure linkage table. Set |
| 1673 | it up. */ |
| 1674 | BFD_ASSERT (h->dynindx != -1); |
| 1675 | |
| 1676 | splt = elf_hash_table (info)->splt; |
| 1677 | sgot = elf_hash_table (info)->sgotplt; |
| 1678 | srela = elf_hash_table (info)->srelplt; |
| 1679 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); |
| 1680 | |
| 1681 | addend = 2 * (h->plt.offset & 1); |
| 1682 | h->plt.offset &= ~1; |
| 1683 | |
| 1684 | /* Get the index in the procedure linkage table which |
| 1685 | corresponds to this symbol. This is the index of this symbol |
| 1686 | in all the symbols for which we are making plt entries. The |
| 1687 | first entry in the procedure linkage table is reserved. */ |
| 1688 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; |
| 1689 | |
| 1690 | /* Get the offset into the .got table of the entry that |
| 1691 | corresponds to this function. Each .got entry is 4 bytes. |
| 1692 | The first two are reserved. */ |
| 1693 | got_offset = (plt_index + 3) * 4; |
| 1694 | |
| 1695 | /* Fill in the entry in the procedure linkage table. */ |
| 1696 | memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry, |
| 1697 | PLT_ENTRY_SIZE); |
| 1698 | |
| 1699 | /* The offset is relative to the first extension word. */ |
| 1700 | bfd_put_32 (output_bfd, |
| 1701 | -(h->plt.offset + 8), |
| 1702 | splt->contents + h->plt.offset + 4); |
| 1703 | |
| 1704 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), |
| 1705 | splt->contents + h->plt.offset + 8); |
| 1706 | |
| 1707 | /* Fill in the entry in the global offset table. */ |
| 1708 | bfd_put_32 (output_bfd, |
| 1709 | (splt->output_section->vma |
| 1710 | + splt->output_offset |
| 1711 | + h->plt.offset) + addend, |
| 1712 | sgot->contents + got_offset); |
| 1713 | |
| 1714 | /* Fill in the entry in the .rela.plt section. */ |
| 1715 | rela.r_offset = (sgot->output_section->vma |
| 1716 | + sgot->output_offset |
| 1717 | + got_offset); |
| 1718 | rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT); |
| 1719 | rela.r_addend = addend; |
| 1720 | loc = srela->contents + plt_index * sizeof (Elf32_External_Rela); |
| 1721 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 1722 | |
| 1723 | if (!h->def_regular) |
| 1724 | { |
| 1725 | /* Mark the symbol as undefined, rather than as defined in |
| 1726 | the .plt section. Leave the value alone. */ |
| 1727 | sym->st_shndx = SHN_UNDEF; |
| 1728 | } |
| 1729 | } |
| 1730 | |
| 1731 | if (h->got.offset != (bfd_vma) -1) |
| 1732 | { |
| 1733 | asection *sgot; |
| 1734 | asection *srela; |
| 1735 | Elf_Internal_Rela rela; |
| 1736 | bfd_byte *loc; |
| 1737 | |
| 1738 | /* This symbol has an entry in the global offset table. Set it |
| 1739 | up. */ |
| 1740 | sgot = elf_hash_table (info)->sgot; |
| 1741 | srela = elf_hash_table (info)->srelgot; |
| 1742 | BFD_ASSERT (sgot != NULL && srela != NULL); |
| 1743 | |
| 1744 | rela.r_offset = (sgot->output_section->vma |
| 1745 | + sgot->output_offset |
| 1746 | + h->got.offset); |
| 1747 | rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT); |
| 1748 | rela.r_addend = bfd_get_signed_32 (output_bfd, |
| 1749 | sgot->contents + h->got.offset); |
| 1750 | |
| 1751 | loc = srela->contents; |
| 1752 | loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); |
| 1753 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 1754 | } |
| 1755 | |
| 1756 | if (h->needs_copy) |
| 1757 | { |
| 1758 | asection *s; |
| 1759 | Elf_Internal_Rela rela; |
| 1760 | bfd_byte *loc; |
| 1761 | |
| 1762 | /* This symbol needs a copy reloc. Set it up. */ |
| 1763 | BFD_ASSERT (h->dynindx != -1 |
| 1764 | && (h->root.type == bfd_link_hash_defined |
| 1765 | || h->root.type == bfd_link_hash_defweak)); |
| 1766 | |
| 1767 | s = bfd_get_linker_section (dynobj, ".rela.bss"); |
| 1768 | BFD_ASSERT (s != NULL); |
| 1769 | |
| 1770 | rela.r_offset = (h->root.u.def.value |
| 1771 | + h->root.u.def.section->output_section->vma |
| 1772 | + h->root.u.def.section->output_offset); |
| 1773 | rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY); |
| 1774 | rela.r_addend = 0; |
| 1775 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 1776 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 1777 | } |
| 1778 | |
| 1779 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 1780 | if (h == elf_hash_table (info)->hdynamic |
| 1781 | || h == elf_hash_table (info)->hgot) |
| 1782 | sym->st_shndx = SHN_ABS; |
| 1783 | |
| 1784 | return TRUE; |
| 1785 | } |
| 1786 | |
| 1787 | /* Finish up the dynamic sections. */ |
| 1788 | |
| 1789 | static bfd_boolean |
| 1790 | elf_vax_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
| 1791 | { |
| 1792 | bfd *dynobj; |
| 1793 | asection *sgot; |
| 1794 | asection *sdyn; |
| 1795 | |
| 1796 | dynobj = elf_hash_table (info)->dynobj; |
| 1797 | |
| 1798 | sgot = elf_hash_table (info)->sgotplt; |
| 1799 | BFD_ASSERT (sgot != NULL); |
| 1800 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 1801 | |
| 1802 | if (elf_hash_table (info)->dynamic_sections_created) |
| 1803 | { |
| 1804 | asection *splt; |
| 1805 | Elf32_External_Dyn *dyncon, *dynconend; |
| 1806 | |
| 1807 | splt = elf_hash_table (info)->splt; |
| 1808 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
| 1809 | |
| 1810 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 1811 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 1812 | for (; dyncon < dynconend; dyncon++) |
| 1813 | { |
| 1814 | Elf_Internal_Dyn dyn; |
| 1815 | asection *s; |
| 1816 | |
| 1817 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 1818 | |
| 1819 | switch (dyn.d_tag) |
| 1820 | { |
| 1821 | default: |
| 1822 | break; |
| 1823 | |
| 1824 | case DT_PLTGOT: |
| 1825 | s = elf_hash_table (info)->sgotplt; |
| 1826 | goto get_vma; |
| 1827 | case DT_JMPREL: |
| 1828 | s = elf_hash_table (info)->srelplt; |
| 1829 | get_vma: |
| 1830 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 1831 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 1832 | break; |
| 1833 | |
| 1834 | case DT_PLTRELSZ: |
| 1835 | s = elf_hash_table (info)->srelplt; |
| 1836 | dyn.d_un.d_val = s->size; |
| 1837 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 1838 | break; |
| 1839 | } |
| 1840 | } |
| 1841 | |
| 1842 | /* Fill in the first entry in the procedure linkage table. */ |
| 1843 | if (splt->size > 0) |
| 1844 | { |
| 1845 | memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE); |
| 1846 | bfd_put_32 (output_bfd, |
| 1847 | (sgot->output_section->vma |
| 1848 | + sgot->output_offset + 4 |
| 1849 | - (splt->output_section->vma + 6)), |
| 1850 | splt->contents + 2); |
| 1851 | bfd_put_32 (output_bfd, |
| 1852 | (sgot->output_section->vma |
| 1853 | + sgot->output_offset + 8 |
| 1854 | - (splt->output_section->vma + 12)), |
| 1855 | splt->contents + 8); |
| 1856 | elf_section_data (splt->output_section)->this_hdr.sh_entsize |
| 1857 | = PLT_ENTRY_SIZE; |
| 1858 | } |
| 1859 | } |
| 1860 | |
| 1861 | /* Fill in the first three entries in the global offset table. */ |
| 1862 | if (sgot->size > 0) |
| 1863 | { |
| 1864 | if (sdyn == NULL) |
| 1865 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
| 1866 | else |
| 1867 | bfd_put_32 (output_bfd, |
| 1868 | sdyn->output_section->vma + sdyn->output_offset, |
| 1869 | sgot->contents); |
| 1870 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); |
| 1871 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); |
| 1872 | } |
| 1873 | |
| 1874 | if (elf_section_data (sgot->output_section) != NULL) |
| 1875 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| 1876 | |
| 1877 | return TRUE; |
| 1878 | } |
| 1879 | |
| 1880 | static enum elf_reloc_type_class |
| 1881 | elf_vax_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 1882 | const asection *rel_sec ATTRIBUTE_UNUSED, |
| 1883 | const Elf_Internal_Rela *rela) |
| 1884 | { |
| 1885 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 1886 | { |
| 1887 | case R_VAX_RELATIVE: |
| 1888 | return reloc_class_relative; |
| 1889 | case R_VAX_JMP_SLOT: |
| 1890 | return reloc_class_plt; |
| 1891 | case R_VAX_COPY: |
| 1892 | return reloc_class_copy; |
| 1893 | default: |
| 1894 | return reloc_class_normal; |
| 1895 | } |
| 1896 | } |
| 1897 | |
| 1898 | static bfd_vma |
| 1899 | elf_vax_plt_sym_val (bfd_vma i, const asection *plt, |
| 1900 | const arelent *rel ATTRIBUTE_UNUSED) |
| 1901 | { |
| 1902 | return plt->vma + (i + 1) * PLT_ENTRY_SIZE; |
| 1903 | } |
| 1904 | |
| 1905 | #define TARGET_LITTLE_SYM vax_elf32_vec |
| 1906 | #define TARGET_LITTLE_NAME "elf32-vax" |
| 1907 | #define ELF_MACHINE_CODE EM_VAX |
| 1908 | #define ELF_MAXPAGESIZE 0x1000 |
| 1909 | |
| 1910 | #define elf_backend_create_dynamic_sections \ |
| 1911 | _bfd_elf_create_dynamic_sections |
| 1912 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 1913 | elf_vax_link_hash_table_create |
| 1914 | #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link |
| 1915 | |
| 1916 | #define elf_backend_check_relocs elf_vax_check_relocs |
| 1917 | #define elf_backend_adjust_dynamic_symbol \ |
| 1918 | elf_vax_adjust_dynamic_symbol |
| 1919 | #define elf_backend_always_size_sections \ |
| 1920 | elf_vax_always_size_sections |
| 1921 | #define elf_backend_size_dynamic_sections \ |
| 1922 | elf_vax_size_dynamic_sections |
| 1923 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
| 1924 | #define elf_backend_relocate_section elf_vax_relocate_section |
| 1925 | #define elf_backend_finish_dynamic_symbol \ |
| 1926 | elf_vax_finish_dynamic_symbol |
| 1927 | #define elf_backend_finish_dynamic_sections \ |
| 1928 | elf_vax_finish_dynamic_sections |
| 1929 | #define elf_backend_reloc_type_class elf_vax_reloc_type_class |
| 1930 | #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook |
| 1931 | #define elf_backend_plt_sym_val elf_vax_plt_sym_val |
| 1932 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
| 1933 | elf32_vax_merge_private_bfd_data |
| 1934 | #define bfd_elf32_bfd_set_private_flags \ |
| 1935 | elf32_vax_set_private_flags |
| 1936 | #define bfd_elf32_bfd_print_private_bfd_data \ |
| 1937 | elf32_vax_print_private_bfd_data |
| 1938 | |
| 1939 | #define elf_backend_can_gc_sections 1 |
| 1940 | #define elf_backend_want_got_plt 1 |
| 1941 | #define elf_backend_plt_readonly 1 |
| 1942 | #define elf_backend_want_plt_sym 0 |
| 1943 | #define elf_backend_got_header_size 16 |
| 1944 | #define elf_backend_rela_normal 1 |
| 1945 | #define elf_backend_dtrel_excludes_plt 1 |
| 1946 | |
| 1947 | #include "elf32-target.h" |