| 1 | /* VAX series support for 32-bit ELF |
| 2 | Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 |
| 3 | Free Software Foundation, Inc. |
| 4 | Contributed by Matt Thomas <matt@3am-software.com>. |
| 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 | #include "bfd.h" |
| 23 | #include "sysdep.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 |
| 30 | PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| 31 | static void rtype_to_howto |
| 32 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
| 33 | static struct bfd_hash_entry *elf_vax_link_hash_newfunc |
| 34 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| 35 | static struct bfd_link_hash_table *elf_vax_link_hash_table_create |
| 36 | PARAMS ((bfd *)); |
| 37 | static bfd_boolean elf_vax_check_relocs |
| 38 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| 39 | const Elf_Internal_Rela *)); |
| 40 | static asection *elf_vax_gc_mark_hook |
| 41 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
| 42 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
| 43 | static bfd_boolean elf_vax_gc_sweep_hook |
| 44 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| 45 | const Elf_Internal_Rela *)); |
| 46 | static bfd_boolean elf_vax_adjust_dynamic_symbol |
| 47 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
| 48 | static bfd_boolean elf_vax_size_dynamic_sections |
| 49 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 50 | static bfd_boolean elf_vax_relocate_section |
| 51 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| 52 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
| 53 | static bfd_boolean elf_vax_finish_dynamic_symbol |
| 54 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
| 55 | Elf_Internal_Sym *)); |
| 56 | static bfd_boolean elf_vax_finish_dynamic_sections |
| 57 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 58 | |
| 59 | static bfd_boolean elf32_vax_set_private_flags |
| 60 | PARAMS ((bfd *, flagword)); |
| 61 | static bfd_boolean elf32_vax_merge_private_bfd_data |
| 62 | PARAMS ((bfd *, bfd *)); |
| 63 | static bfd_boolean elf32_vax_print_private_bfd_data |
| 64 | PARAMS ((bfd *, PTR)); |
| 65 | |
| 66 | static reloc_howto_type howto_table[] = { |
| 67 | HOWTO (R_VAX_NONE, /* type */ |
| 68 | 0, /* rightshift */ |
| 69 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 70 | 0, /* bitsize */ |
| 71 | FALSE, /* pc_relative */ |
| 72 | 0, /* bitpos */ |
| 73 | complain_overflow_dont, /* complain_on_overflow */ |
| 74 | bfd_elf_generic_reloc, /* special_function */ |
| 75 | "R_VAX_NONE", /* name */ |
| 76 | FALSE, /* partial_inplace */ |
| 77 | 0, /* src_mask */ |
| 78 | 0x00000000, /* dst_mask */ |
| 79 | FALSE), /* pcrel_offset */ |
| 80 | |
| 81 | HOWTO (R_VAX_32, /* type */ |
| 82 | 0, /* rightshift */ |
| 83 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 84 | 32, /* bitsize */ |
| 85 | FALSE, /* pc_relative */ |
| 86 | 0, /* bitpos */ |
| 87 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 88 | bfd_elf_generic_reloc, /* special_function */ |
| 89 | "R_VAX_32", /* name */ |
| 90 | FALSE, /* partial_inplace */ |
| 91 | 0, /* src_mask */ |
| 92 | 0xffffffff, /* dst_mask */ |
| 93 | FALSE), /* pcrel_offset */ |
| 94 | |
| 95 | HOWTO (R_VAX_16, /* type */ |
| 96 | 0, /* rightshift */ |
| 97 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 98 | 16, /* bitsize */ |
| 99 | FALSE, /* pc_relative */ |
| 100 | 0, /* bitpos */ |
| 101 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 102 | bfd_elf_generic_reloc, /* special_function */ |
| 103 | "R_VAX_16", /* name */ |
| 104 | FALSE, /* partial_inplace */ |
| 105 | 0, /* src_mask */ |
| 106 | 0x0000ffff, /* dst_mask */ |
| 107 | FALSE), /* pcrel_offset */ |
| 108 | |
| 109 | HOWTO (R_VAX_8, /* type */ |
| 110 | 0, /* rightshift */ |
| 111 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 112 | 8, /* bitsize */ |
| 113 | FALSE, /* pc_relative */ |
| 114 | 0, /* bitpos */ |
| 115 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 116 | bfd_elf_generic_reloc, /* special_function */ |
| 117 | "R_VAX_8", /* name */ |
| 118 | FALSE, /* partial_inplace */ |
| 119 | 0, /* src_mask */ |
| 120 | 0x000000ff, /* dst_mask */ |
| 121 | FALSE), /* pcrel_offset */ |
| 122 | |
| 123 | HOWTO (R_VAX_PC32, /* type */ |
| 124 | 0, /* rightshift */ |
| 125 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 126 | 32, /* bitsize */ |
| 127 | TRUE, /* pc_relative */ |
| 128 | 0, /* bitpos */ |
| 129 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 130 | bfd_elf_generic_reloc, /* special_function */ |
| 131 | "R_VAX_PC32", /* name */ |
| 132 | FALSE, /* partial_inplace */ |
| 133 | 0, /* src_mask */ |
| 134 | 0xffffffff, /* dst_mask */ |
| 135 | TRUE), /* pcrel_offset */ |
| 136 | |
| 137 | HOWTO (R_VAX_PC16, /* type */ |
| 138 | 0, /* rightshift */ |
| 139 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 140 | 16, /* bitsize */ |
| 141 | TRUE, /* pc_relative */ |
| 142 | 0, /* bitpos */ |
| 143 | complain_overflow_signed, /* complain_on_overflow */ |
| 144 | bfd_elf_generic_reloc, /* special_function */ |
| 145 | "R_VAX_PC16", /* name */ |
| 146 | FALSE, /* partial_inplace */ |
| 147 | 0, /* src_mask */ |
| 148 | 0x0000ffff, /* dst_mask */ |
| 149 | TRUE), /* pcrel_offset */ |
| 150 | |
| 151 | HOWTO (R_VAX_PC8, /* type */ |
| 152 | 0, /* rightshift */ |
| 153 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 154 | 8, /* bitsize */ |
| 155 | TRUE, /* pc_relative */ |
| 156 | 0, /* bitpos */ |
| 157 | complain_overflow_signed, /* complain_on_overflow */ |
| 158 | bfd_elf_generic_reloc, /* special_function */ |
| 159 | "R_VAX_PC8", /* name */ |
| 160 | FALSE, /* partial_inplace */ |
| 161 | 0, /* src_mask */ |
| 162 | 0x000000ff, /* dst_mask */ |
| 163 | TRUE), /* pcrel_offset */ |
| 164 | |
| 165 | HOWTO (R_VAX_GOT32, /* type */ |
| 166 | 0, /* rightshift */ |
| 167 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 168 | 32, /* bitsize */ |
| 169 | TRUE, /* pc_relative */ |
| 170 | 0, /* bitpos */ |
| 171 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 172 | bfd_elf_generic_reloc, /* special_function */ |
| 173 | "R_VAX_GOT32", /* name */ |
| 174 | FALSE, /* partial_inplace */ |
| 175 | 0, /* src_mask */ |
| 176 | 0xffffffff, /* dst_mask */ |
| 177 | TRUE), /* pcrel_offset */ |
| 178 | |
| 179 | EMPTY_HOWTO (-1), |
| 180 | EMPTY_HOWTO (-1), |
| 181 | EMPTY_HOWTO (-1), |
| 182 | EMPTY_HOWTO (-1), |
| 183 | EMPTY_HOWTO (-1), |
| 184 | |
| 185 | HOWTO (R_VAX_PLT32, /* type */ |
| 186 | 0, /* rightshift */ |
| 187 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 188 | 32, /* bitsize */ |
| 189 | TRUE, /* pc_relative */ |
| 190 | 0, /* bitpos */ |
| 191 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 192 | bfd_elf_generic_reloc, /* special_function */ |
| 193 | "R_VAX_PLT32", /* name */ |
| 194 | FALSE, /* partial_inplace */ |
| 195 | 0, /* src_mask */ |
| 196 | 0xffffffff, /* dst_mask */ |
| 197 | TRUE), /* pcrel_offset */ |
| 198 | |
| 199 | EMPTY_HOWTO (-1), |
| 200 | EMPTY_HOWTO (-1), |
| 201 | EMPTY_HOWTO (-1), |
| 202 | EMPTY_HOWTO (-1), |
| 203 | EMPTY_HOWTO (-1), |
| 204 | |
| 205 | HOWTO (R_VAX_COPY, /* type */ |
| 206 | 0, /* rightshift */ |
| 207 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 208 | 0, /* bitsize */ |
| 209 | FALSE, /* pc_relative */ |
| 210 | 0, /* bitpos */ |
| 211 | complain_overflow_dont, /* complain_on_overflow */ |
| 212 | bfd_elf_generic_reloc, /* special_function */ |
| 213 | "R_VAX_COPY", /* name */ |
| 214 | FALSE, /* partial_inplace */ |
| 215 | 0, /* src_mask */ |
| 216 | 0xffffffff, /* dst_mask */ |
| 217 | FALSE), /* pcrel_offset */ |
| 218 | |
| 219 | HOWTO (R_VAX_GLOB_DAT, /* type */ |
| 220 | 0, /* rightshift */ |
| 221 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 222 | 32, /* bitsize */ |
| 223 | FALSE, /* pc_relative */ |
| 224 | 0, /* bitpos */ |
| 225 | complain_overflow_dont, /* complain_on_overflow */ |
| 226 | bfd_elf_generic_reloc, /* special_function */ |
| 227 | "R_VAX_GLOB_DAT", /* name */ |
| 228 | FALSE, /* partial_inplace */ |
| 229 | 0, /* src_mask */ |
| 230 | 0xffffffff, /* dst_mask */ |
| 231 | FALSE), /* pcrel_offset */ |
| 232 | |
| 233 | HOWTO (R_VAX_JMP_SLOT, /* type */ |
| 234 | 0, /* rightshift */ |
| 235 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 236 | 32, /* bitsize */ |
| 237 | FALSE, /* pc_relative */ |
| 238 | 0, /* bitpos */ |
| 239 | complain_overflow_dont, /* complain_on_overflow */ |
| 240 | bfd_elf_generic_reloc, /* special_function */ |
| 241 | "R_VAX_JMP_SLOT", /* name */ |
| 242 | FALSE, /* partial_inplace */ |
| 243 | 0, /* src_mask */ |
| 244 | 0xffffffff, /* dst_mask */ |
| 245 | FALSE), /* pcrel_offset */ |
| 246 | |
| 247 | HOWTO (R_VAX_RELATIVE, /* type */ |
| 248 | 0, /* rightshift */ |
| 249 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 250 | 32, /* bitsize */ |
| 251 | FALSE, /* pc_relative */ |
| 252 | 0, /* bitpos */ |
| 253 | complain_overflow_dont, /* complain_on_overflow */ |
| 254 | bfd_elf_generic_reloc, /* special_function */ |
| 255 | "R_VAX_RELATIVE", /* name */ |
| 256 | FALSE, /* partial_inplace */ |
| 257 | 0, /* src_mask */ |
| 258 | 0xffffffff, /* dst_mask */ |
| 259 | FALSE), /* pcrel_offset */ |
| 260 | |
| 261 | /* GNU extension to record C++ vtable hierarchy */ |
| 262 | HOWTO (R_VAX_GNU_VTINHERIT, /* type */ |
| 263 | 0, /* rightshift */ |
| 264 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 265 | 0, /* bitsize */ |
| 266 | FALSE, /* pc_relative */ |
| 267 | 0, /* bitpos */ |
| 268 | complain_overflow_dont, /* complain_on_overflow */ |
| 269 | NULL, /* special_function */ |
| 270 | "R_VAX_GNU_VTINHERIT", /* name */ |
| 271 | FALSE, /* partial_inplace */ |
| 272 | 0, /* src_mask */ |
| 273 | 0, /* dst_mask */ |
| 274 | FALSE), /* pcrel_offset */ |
| 275 | |
| 276 | /* GNU extension to record C++ vtable member usage */ |
| 277 | HOWTO (R_VAX_GNU_VTENTRY, /* type */ |
| 278 | 0, /* rightshift */ |
| 279 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 280 | 0, /* bitsize */ |
| 281 | FALSE, /* pc_relative */ |
| 282 | 0, /* bitpos */ |
| 283 | complain_overflow_dont, /* complain_on_overflow */ |
| 284 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| 285 | "R_VAX_GNU_VTENTRY", /* name */ |
| 286 | FALSE, /* partial_inplace */ |
| 287 | 0, /* src_mask */ |
| 288 | 0, /* dst_mask */ |
| 289 | FALSE), /* pcrel_offset */ |
| 290 | }; |
| 291 | |
| 292 | static void |
| 293 | rtype_to_howto (abfd, cache_ptr, dst) |
| 294 | bfd *abfd ATTRIBUTE_UNUSED; |
| 295 | arelent *cache_ptr; |
| 296 | Elf_Internal_Rela *dst; |
| 297 | { |
| 298 | BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max); |
| 299 | cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)]; |
| 300 | } |
| 301 | |
| 302 | #define elf_info_to_howto rtype_to_howto |
| 303 | |
| 304 | static const struct |
| 305 | { |
| 306 | bfd_reloc_code_real_type bfd_val; |
| 307 | int elf_val; |
| 308 | } reloc_map[] = { |
| 309 | { BFD_RELOC_NONE, R_VAX_NONE }, |
| 310 | { BFD_RELOC_32, R_VAX_32 }, |
| 311 | { BFD_RELOC_16, R_VAX_16 }, |
| 312 | { BFD_RELOC_8, R_VAX_8 }, |
| 313 | { BFD_RELOC_32_PCREL, R_VAX_PC32 }, |
| 314 | { BFD_RELOC_16_PCREL, R_VAX_PC16 }, |
| 315 | { BFD_RELOC_8_PCREL, R_VAX_PC8 }, |
| 316 | { BFD_RELOC_32_GOT_PCREL, R_VAX_GOT32 }, |
| 317 | { BFD_RELOC_32_PLT_PCREL, R_VAX_PLT32 }, |
| 318 | { BFD_RELOC_NONE, R_VAX_COPY }, |
| 319 | { BFD_RELOC_VAX_GLOB_DAT, R_VAX_GLOB_DAT }, |
| 320 | { BFD_RELOC_VAX_JMP_SLOT, R_VAX_JMP_SLOT }, |
| 321 | { BFD_RELOC_VAX_RELATIVE, R_VAX_RELATIVE }, |
| 322 | { BFD_RELOC_CTOR, R_VAX_32 }, |
| 323 | { BFD_RELOC_VTABLE_INHERIT, R_VAX_GNU_VTINHERIT }, |
| 324 | { BFD_RELOC_VTABLE_ENTRY, R_VAX_GNU_VTENTRY }, |
| 325 | }; |
| 326 | |
| 327 | static reloc_howto_type * |
| 328 | reloc_type_lookup (abfd, code) |
| 329 | bfd *abfd ATTRIBUTE_UNUSED; |
| 330 | bfd_reloc_code_real_type code; |
| 331 | { |
| 332 | unsigned int i; |
| 333 | for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++) |
| 334 | { |
| 335 | if (reloc_map[i].bfd_val == code) |
| 336 | return &howto_table[reloc_map[i].elf_val]; |
| 337 | } |
| 338 | return 0; |
| 339 | } |
| 340 | |
| 341 | #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup |
| 342 | #define ELF_ARCH bfd_arch_vax |
| 343 | /* end code generated by elf.el */ |
| 344 | \f |
| 345 | /* Functions for the VAX ELF linker. */ |
| 346 | |
| 347 | /* The name of the dynamic interpreter. This is put in the .interp |
| 348 | section. */ |
| 349 | |
| 350 | #define ELF_DYNAMIC_INTERPRETER "/usr/libexec/ld.elf_so" |
| 351 | |
| 352 | /* The size in bytes of an entry in the procedure linkage table. */ |
| 353 | |
| 354 | #define PLT_ENTRY_SIZE 12 |
| 355 | |
| 356 | /* The first entry in a procedure linkage table looks like this. See |
| 357 | the SVR4 ABI VAX supplement to see how this works. */ |
| 358 | |
| 359 | static const bfd_byte elf_vax_plt0_entry[PLT_ENTRY_SIZE] = |
| 360 | { |
| 361 | 0xdd, 0xef, /* pushl l^ */ |
| 362 | 0, 0, 0, 0, /* offset to .plt.got + 4 */ |
| 363 | 0x17, 0xff, /* jmp @L^(pc) */ |
| 364 | 0, 0, 0, 0, /* offset to .plt.got + 8 */ |
| 365 | }; |
| 366 | |
| 367 | /* Subsequent entries in a procedure linkage table look like this. */ |
| 368 | |
| 369 | static const bfd_byte elf_vax_plt_entry[PLT_ENTRY_SIZE] = |
| 370 | { |
| 371 | 0x40, 0x00, /* .word ^M<r6> */ |
| 372 | 0x16, 0xef, /* jsb L^(pc) */ |
| 373 | 0, 0, 0, 0, /* replaced with offset to start of .plt */ |
| 374 | 0, 0, 0, 0, /* index into .rela.plt */ |
| 375 | }; |
| 376 | |
| 377 | /* The VAX linker needs to keep track of the number of relocs that it |
| 378 | decides to copy in check_relocs for each symbol. This is so that it |
| 379 | can discard PC relative relocs if it doesn't need them when linking |
| 380 | with -Bsymbolic. We store the information in a field extending the |
| 381 | regular ELF linker hash table. */ |
| 382 | |
| 383 | /* This structure keeps track of the number of PC relative relocs we have |
| 384 | copied for a given symbol. */ |
| 385 | |
| 386 | struct elf_vax_pcrel_relocs_copied |
| 387 | { |
| 388 | /* Next section. */ |
| 389 | struct elf_vax_pcrel_relocs_copied *next; |
| 390 | /* A section in dynobj. */ |
| 391 | asection *section; |
| 392 | /* Number of relocs copied in this section. */ |
| 393 | bfd_size_type count; |
| 394 | }; |
| 395 | |
| 396 | /* VAX ELF linker hash entry. */ |
| 397 | |
| 398 | struct elf_vax_link_hash_entry |
| 399 | { |
| 400 | struct elf_link_hash_entry root; |
| 401 | |
| 402 | /* Number of PC relative relocs copied for this symbol. */ |
| 403 | struct elf_vax_pcrel_relocs_copied *pcrel_relocs_copied; |
| 404 | |
| 405 | bfd_vma got_addend; |
| 406 | }; |
| 407 | |
| 408 | /* VAX ELF linker hash table. */ |
| 409 | |
| 410 | struct elf_vax_link_hash_table |
| 411 | { |
| 412 | struct elf_link_hash_table root; |
| 413 | }; |
| 414 | |
| 415 | /* Declare this now that the above structures are defined. */ |
| 416 | |
| 417 | static bfd_boolean elf_vax_discard_copies |
| 418 | PARAMS ((struct elf_vax_link_hash_entry *, PTR)); |
| 419 | |
| 420 | /* Declare this now that the above structures are defined. */ |
| 421 | |
| 422 | static bfd_boolean elf_vax_instantiate_got_entries |
| 423 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
| 424 | |
| 425 | /* Traverse an VAX ELF linker hash table. */ |
| 426 | |
| 427 | #define elf_vax_link_hash_traverse(table, func, info) \ |
| 428 | (elf_link_hash_traverse \ |
| 429 | (&(table)->root, \ |
| 430 | (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ |
| 431 | (info))) |
| 432 | |
| 433 | /* Get the VAX ELF linker hash table from a link_info structure. */ |
| 434 | |
| 435 | #define elf_vax_hash_table(p) \ |
| 436 | ((struct elf_vax_link_hash_table *) (p)->hash) |
| 437 | |
| 438 | /* Create an entry in an VAX ELF linker hash table. */ |
| 439 | |
| 440 | static struct bfd_hash_entry * |
| 441 | elf_vax_link_hash_newfunc (entry, table, string) |
| 442 | struct bfd_hash_entry *entry; |
| 443 | struct bfd_hash_table *table; |
| 444 | const char *string; |
| 445 | { |
| 446 | struct elf_vax_link_hash_entry *ret = |
| 447 | (struct elf_vax_link_hash_entry *) entry; |
| 448 | |
| 449 | /* Allocate the structure if it has not already been allocated by a |
| 450 | subclass. */ |
| 451 | if (ret == (struct elf_vax_link_hash_entry *) NULL) |
| 452 | ret = ((struct elf_vax_link_hash_entry *) |
| 453 | bfd_hash_allocate (table, |
| 454 | sizeof (struct elf_vax_link_hash_entry))); |
| 455 | if (ret == (struct elf_vax_link_hash_entry *) NULL) |
| 456 | return (struct bfd_hash_entry *) ret; |
| 457 | |
| 458 | /* Call the allocation method of the superclass. */ |
| 459 | ret = ((struct elf_vax_link_hash_entry *) |
| 460 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 461 | table, string)); |
| 462 | if (ret != (struct elf_vax_link_hash_entry *) NULL) |
| 463 | { |
| 464 | ret->pcrel_relocs_copied = NULL; |
| 465 | } |
| 466 | |
| 467 | return (struct bfd_hash_entry *) ret; |
| 468 | } |
| 469 | |
| 470 | /* Create an VAX ELF linker hash table. */ |
| 471 | |
| 472 | static struct bfd_link_hash_table * |
| 473 | elf_vax_link_hash_table_create (abfd) |
| 474 | bfd *abfd; |
| 475 | { |
| 476 | struct elf_vax_link_hash_table *ret; |
| 477 | bfd_size_type amt = sizeof (struct elf_vax_link_hash_table); |
| 478 | |
| 479 | ret = (struct elf_vax_link_hash_table *) bfd_malloc (amt); |
| 480 | if (ret == (struct elf_vax_link_hash_table *) NULL) |
| 481 | return NULL; |
| 482 | |
| 483 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 484 | elf_vax_link_hash_newfunc)) |
| 485 | { |
| 486 | free (ret); |
| 487 | return NULL; |
| 488 | } |
| 489 | |
| 490 | return &ret->root.root; |
| 491 | } |
| 492 | |
| 493 | /* Keep vax-specific flags in the ELF header */ |
| 494 | static bfd_boolean |
| 495 | elf32_vax_set_private_flags (abfd, flags) |
| 496 | bfd *abfd; |
| 497 | flagword flags; |
| 498 | { |
| 499 | elf_elfheader (abfd)->e_flags = flags; |
| 500 | elf_flags_init (abfd) = TRUE; |
| 501 | return TRUE; |
| 502 | } |
| 503 | |
| 504 | /* Merge backend specific data from an object file to the output |
| 505 | object file when linking. */ |
| 506 | static bfd_boolean |
| 507 | elf32_vax_merge_private_bfd_data (ibfd, obfd) |
| 508 | bfd *ibfd; |
| 509 | bfd *obfd; |
| 510 | { |
| 511 | flagword out_flags; |
| 512 | flagword in_flags; |
| 513 | |
| 514 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 515 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 516 | return TRUE; |
| 517 | |
| 518 | in_flags = elf_elfheader (ibfd)->e_flags; |
| 519 | out_flags = elf_elfheader (obfd)->e_flags; |
| 520 | |
| 521 | if (!elf_flags_init (obfd)) |
| 522 | { |
| 523 | elf_flags_init (obfd) = TRUE; |
| 524 | elf_elfheader (obfd)->e_flags = in_flags; |
| 525 | } |
| 526 | |
| 527 | return TRUE; |
| 528 | } |
| 529 | |
| 530 | /* Display the flags field */ |
| 531 | static bfd_boolean |
| 532 | elf32_vax_print_private_bfd_data (abfd, ptr) |
| 533 | bfd *abfd; |
| 534 | PTR ptr; |
| 535 | { |
| 536 | FILE *file = (FILE *) ptr; |
| 537 | |
| 538 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 539 | |
| 540 | /* Print normal ELF private data. */ |
| 541 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 542 | |
| 543 | /* Ignore init flag - it may not be set, despite the flags field containing valid data. */ |
| 544 | |
| 545 | /* xgettext:c-format */ |
| 546 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| 547 | |
| 548 | if (elf_elfheader (abfd)->e_flags & EF_VAX_NONPIC) |
| 549 | fprintf (file, _(" [nonpic]")); |
| 550 | |
| 551 | if (elf_elfheader (abfd)->e_flags & EF_VAX_DFLOAT) |
| 552 | fprintf (file, _(" [d-float]")); |
| 553 | |
| 554 | if (elf_elfheader (abfd)->e_flags & EF_VAX_GFLOAT) |
| 555 | fprintf (file, _(" [g-float]")); |
| 556 | |
| 557 | fputc ('\n', file); |
| 558 | |
| 559 | return TRUE; |
| 560 | } |
| 561 | /* Look through the relocs for a section during the first phase, and |
| 562 | allocate space in the global offset table or procedure linkage |
| 563 | table. */ |
| 564 | |
| 565 | static bfd_boolean |
| 566 | elf_vax_check_relocs (abfd, info, sec, relocs) |
| 567 | bfd *abfd; |
| 568 | struct bfd_link_info *info; |
| 569 | asection *sec; |
| 570 | const Elf_Internal_Rela *relocs; |
| 571 | { |
| 572 | bfd *dynobj; |
| 573 | Elf_Internal_Shdr *symtab_hdr; |
| 574 | struct elf_link_hash_entry **sym_hashes; |
| 575 | const Elf_Internal_Rela *rel; |
| 576 | const Elf_Internal_Rela *rel_end; |
| 577 | asection *sgot; |
| 578 | asection *srelgot; |
| 579 | asection *sreloc; |
| 580 | |
| 581 | if (info->relocatable) |
| 582 | return TRUE; |
| 583 | |
| 584 | dynobj = elf_hash_table (info)->dynobj; |
| 585 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 586 | sym_hashes = elf_sym_hashes (abfd); |
| 587 | |
| 588 | sgot = NULL; |
| 589 | srelgot = NULL; |
| 590 | sreloc = NULL; |
| 591 | |
| 592 | rel_end = relocs + sec->reloc_count; |
| 593 | for (rel = relocs; rel < rel_end; rel++) |
| 594 | { |
| 595 | unsigned long r_symndx; |
| 596 | struct elf_link_hash_entry *h; |
| 597 | |
| 598 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 599 | |
| 600 | if (r_symndx < symtab_hdr->sh_info) |
| 601 | h = NULL; |
| 602 | else |
| 603 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 604 | |
| 605 | switch (ELF32_R_TYPE (rel->r_info)) |
| 606 | { |
| 607 | case R_VAX_GOT32: |
| 608 | if (h != NULL |
| 609 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 610 | break; |
| 611 | |
| 612 | /* This symbol requires a global offset table entry. */ |
| 613 | |
| 614 | if (dynobj == NULL) |
| 615 | { |
| 616 | /* Create the .got section. */ |
| 617 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 618 | if (!_bfd_elf_create_got_section (dynobj, info)) |
| 619 | return FALSE; |
| 620 | } |
| 621 | |
| 622 | if (sgot == NULL) |
| 623 | { |
| 624 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 625 | BFD_ASSERT (sgot != NULL); |
| 626 | } |
| 627 | |
| 628 | if (srelgot == NULL |
| 629 | && (h != NULL || info->shared)) |
| 630 | { |
| 631 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 632 | if (srelgot == NULL) |
| 633 | { |
| 634 | srelgot = bfd_make_section (dynobj, ".rela.got"); |
| 635 | if (srelgot == NULL |
| 636 | || !bfd_set_section_flags (dynobj, srelgot, |
| 637 | (SEC_ALLOC |
| 638 | | SEC_LOAD |
| 639 | | SEC_HAS_CONTENTS |
| 640 | | SEC_IN_MEMORY |
| 641 | | SEC_LINKER_CREATED |
| 642 | | SEC_READONLY)) |
| 643 | || !bfd_set_section_alignment (dynobj, srelgot, 2)) |
| 644 | return FALSE; |
| 645 | } |
| 646 | } |
| 647 | |
| 648 | if (h != NULL) |
| 649 | { |
| 650 | struct elf_vax_link_hash_entry *eh; |
| 651 | |
| 652 | eh = (struct elf_vax_link_hash_entry *) h; |
| 653 | if (h->got.refcount == -1) |
| 654 | { |
| 655 | h->got.refcount = 1; |
| 656 | eh->got_addend = rel->r_addend; |
| 657 | } |
| 658 | else |
| 659 | { |
| 660 | h->got.refcount++; |
| 661 | if (eh->got_addend != (bfd_vma) rel->r_addend) |
| 662 | (*_bfd_error_handler) |
| 663 | (_("%s: warning: GOT addend of %ld to `%s' does not match previous GOT addend of %ld"), |
| 664 | bfd_get_filename (abfd), rel->r_addend, |
| 665 | h->root.root.string, |
| 666 | eh->got_addend); |
| 667 | |
| 668 | } |
| 669 | } |
| 670 | break; |
| 671 | |
| 672 | case R_VAX_PLT32: |
| 673 | /* This symbol requires a procedure linkage table entry. We |
| 674 | actually build the entry in adjust_dynamic_symbol, |
| 675 | because this might be a case of linking PIC code which is |
| 676 | never referenced by a dynamic object, in which case we |
| 677 | don't need to generate a procedure linkage table entry |
| 678 | after all. */ |
| 679 | |
| 680 | /* If this is a local symbol, we resolve it directly without |
| 681 | creating a procedure linkage table entry. */ |
| 682 | if (h == NULL) |
| 683 | continue; |
| 684 | |
| 685 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 686 | if (h->plt.refcount == -1) |
| 687 | h->plt.refcount = 1; |
| 688 | else |
| 689 | h->plt.refcount++; |
| 690 | break; |
| 691 | |
| 692 | case R_VAX_PC8: |
| 693 | case R_VAX_PC16: |
| 694 | case R_VAX_PC32: |
| 695 | /* If we are creating a shared library and this is not a local |
| 696 | symbol, we need to copy the reloc into the shared library. |
| 697 | However when linking with -Bsymbolic and this is a global |
| 698 | symbol which is defined in an object we are including in the |
| 699 | link (i.e., DEF_REGULAR is set), then we can resolve the |
| 700 | reloc directly. At this point we have not seen all the input |
| 701 | files, so it is possible that DEF_REGULAR is not set now but |
| 702 | will be set later (it is never cleared). We account for that |
| 703 | possibility below by storing information in the |
| 704 | pcrel_relocs_copied field of the hash table entry. */ |
| 705 | if (!(info->shared |
| 706 | && (sec->flags & SEC_ALLOC) != 0 |
| 707 | && h != NULL |
| 708 | && (!info->symbolic |
| 709 | || (h->elf_link_hash_flags |
| 710 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) |
| 711 | { |
| 712 | if (h != NULL) |
| 713 | { |
| 714 | /* Make sure a plt entry is created for this symbol if |
| 715 | it turns out to be a function defined by a dynamic |
| 716 | object. */ |
| 717 | if (h->plt.refcount == -1) |
| 718 | h->plt.refcount = 1; |
| 719 | else |
| 720 | h->plt.refcount++; |
| 721 | } |
| 722 | break; |
| 723 | } |
| 724 | /* Fall through. */ |
| 725 | case R_VAX_8: |
| 726 | case R_VAX_16: |
| 727 | case R_VAX_32: |
| 728 | if (h != NULL) |
| 729 | { |
| 730 | /* Make sure a plt entry is created for this symbol if it |
| 731 | turns out to be a function defined by a dynamic object. */ |
| 732 | if (h->plt.refcount == -1) |
| 733 | h->plt.refcount = 1; |
| 734 | else |
| 735 | h->plt.refcount++; |
| 736 | } |
| 737 | |
| 738 | /* If we are creating a shared library, we need to copy the |
| 739 | reloc into the shared library. */ |
| 740 | if (info->shared |
| 741 | && (sec->flags & SEC_ALLOC) != 0) |
| 742 | { |
| 743 | /* When creating a shared object, we must copy these |
| 744 | reloc types into the output file. We create a reloc |
| 745 | section in dynobj and make room for this reloc. */ |
| 746 | if (sreloc == NULL) |
| 747 | { |
| 748 | const char *name; |
| 749 | |
| 750 | name = (bfd_elf_string_from_elf_section |
| 751 | (abfd, |
| 752 | elf_elfheader (abfd)->e_shstrndx, |
| 753 | elf_section_data (sec)->rel_hdr.sh_name)); |
| 754 | if (name == NULL) |
| 755 | return FALSE; |
| 756 | |
| 757 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 758 | && strcmp (bfd_get_section_name (abfd, sec), |
| 759 | name + 5) == 0); |
| 760 | |
| 761 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 762 | if (sreloc == NULL) |
| 763 | { |
| 764 | sreloc = bfd_make_section (dynobj, name); |
| 765 | if (sreloc == NULL |
| 766 | || !bfd_set_section_flags (dynobj, sreloc, |
| 767 | (SEC_ALLOC |
| 768 | | SEC_LOAD |
| 769 | | SEC_HAS_CONTENTS |
| 770 | | SEC_IN_MEMORY |
| 771 | | SEC_LINKER_CREATED |
| 772 | | SEC_READONLY)) |
| 773 | || !bfd_set_section_alignment (dynobj, sreloc, 2)) |
| 774 | return FALSE; |
| 775 | } |
| 776 | if (sec->flags & SEC_READONLY) |
| 777 | info->flags |= DF_TEXTREL; |
| 778 | } |
| 779 | |
| 780 | sreloc->_raw_size += sizeof (Elf32_External_Rela); |
| 781 | |
| 782 | /* If we are linking with -Bsymbolic, we count the number of |
| 783 | PC relative relocations we have entered for this symbol, |
| 784 | so that we can discard them again if the symbol is later |
| 785 | defined by a regular object. Note that this function is |
| 786 | only called if we are using a vaxelf linker hash table, |
| 787 | which means that h is really a pointer to an |
| 788 | elf_vax_link_hash_entry. */ |
| 789 | if ((ELF32_R_TYPE (rel->r_info) == R_VAX_PC8 |
| 790 | || ELF32_R_TYPE (rel->r_info) == R_VAX_PC16 |
| 791 | || ELF32_R_TYPE (rel->r_info) == R_VAX_PC32) |
| 792 | && info->symbolic) |
| 793 | { |
| 794 | struct elf_vax_link_hash_entry *eh; |
| 795 | struct elf_vax_pcrel_relocs_copied *p; |
| 796 | |
| 797 | eh = (struct elf_vax_link_hash_entry *) h; |
| 798 | |
| 799 | for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) |
| 800 | if (p->section == sreloc) |
| 801 | break; |
| 802 | |
| 803 | if (p == NULL) |
| 804 | { |
| 805 | p = ((struct elf_vax_pcrel_relocs_copied *) |
| 806 | bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); |
| 807 | if (p == NULL) |
| 808 | return FALSE; |
| 809 | p->next = eh->pcrel_relocs_copied; |
| 810 | eh->pcrel_relocs_copied = p; |
| 811 | p->section = sreloc; |
| 812 | p->count = 0; |
| 813 | } |
| 814 | |
| 815 | ++p->count; |
| 816 | } |
| 817 | } |
| 818 | |
| 819 | break; |
| 820 | |
| 821 | /* This relocation describes the C++ object vtable hierarchy. |
| 822 | Reconstruct it for later use during GC. */ |
| 823 | case R_VAX_GNU_VTINHERIT: |
| 824 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 825 | return FALSE; |
| 826 | break; |
| 827 | |
| 828 | /* This relocation describes which C++ vtable entries are actually |
| 829 | used. Record for later use during GC. */ |
| 830 | case R_VAX_GNU_VTENTRY: |
| 831 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 832 | return FALSE; |
| 833 | break; |
| 834 | |
| 835 | default: |
| 836 | break; |
| 837 | } |
| 838 | } |
| 839 | |
| 840 | return TRUE; |
| 841 | } |
| 842 | |
| 843 | /* Return the section that should be marked against GC for a given |
| 844 | relocation. */ |
| 845 | |
| 846 | static asection * |
| 847 | elf_vax_gc_mark_hook (sec, info, rel, h, sym) |
| 848 | asection *sec; |
| 849 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 850 | Elf_Internal_Rela *rel; |
| 851 | struct elf_link_hash_entry *h; |
| 852 | Elf_Internal_Sym *sym; |
| 853 | { |
| 854 | if (h != NULL) |
| 855 | { |
| 856 | switch (ELF32_R_TYPE (rel->r_info)) |
| 857 | { |
| 858 | case R_VAX_GNU_VTINHERIT: |
| 859 | case R_VAX_GNU_VTENTRY: |
| 860 | break; |
| 861 | |
| 862 | default: |
| 863 | switch (h->root.type) |
| 864 | { |
| 865 | default: |
| 866 | break; |
| 867 | |
| 868 | case bfd_link_hash_defined: |
| 869 | case bfd_link_hash_defweak: |
| 870 | return h->root.u.def.section; |
| 871 | |
| 872 | case bfd_link_hash_common: |
| 873 | return h->root.u.c.p->section; |
| 874 | } |
| 875 | } |
| 876 | } |
| 877 | else |
| 878 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| 879 | |
| 880 | return NULL; |
| 881 | } |
| 882 | |
| 883 | /* Update the got entry reference counts for the section being removed. */ |
| 884 | |
| 885 | static bfd_boolean |
| 886 | elf_vax_gc_sweep_hook (abfd, info, sec, relocs) |
| 887 | bfd *abfd; |
| 888 | struct bfd_link_info *info; |
| 889 | asection *sec; |
| 890 | const Elf_Internal_Rela *relocs; |
| 891 | { |
| 892 | Elf_Internal_Shdr *symtab_hdr; |
| 893 | struct elf_link_hash_entry **sym_hashes; |
| 894 | const Elf_Internal_Rela *rel, *relend; |
| 895 | unsigned long r_symndx; |
| 896 | struct elf_link_hash_entry *h; |
| 897 | bfd *dynobj; |
| 898 | |
| 899 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 900 | sym_hashes = elf_sym_hashes (abfd); |
| 901 | |
| 902 | dynobj = elf_hash_table (info)->dynobj; |
| 903 | if (dynobj == NULL) |
| 904 | return TRUE; |
| 905 | |
| 906 | relend = relocs + sec->reloc_count; |
| 907 | for (rel = relocs; rel < relend; rel++) |
| 908 | { |
| 909 | switch (ELF32_R_TYPE (rel->r_info)) |
| 910 | { |
| 911 | case R_VAX_GOT32: |
| 912 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 913 | if (r_symndx >= symtab_hdr->sh_info) |
| 914 | { |
| 915 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 916 | if (h->got.refcount > 0) |
| 917 | --h->got.refcount; |
| 918 | } |
| 919 | break; |
| 920 | |
| 921 | case R_VAX_PLT32: |
| 922 | case R_VAX_PC8: |
| 923 | case R_VAX_PC16: |
| 924 | case R_VAX_PC32: |
| 925 | case R_VAX_8: |
| 926 | case R_VAX_16: |
| 927 | case R_VAX_32: |
| 928 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 929 | if (r_symndx >= symtab_hdr->sh_info) |
| 930 | { |
| 931 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 932 | if (h->plt.refcount > 0) |
| 933 | --h->plt.refcount; |
| 934 | } |
| 935 | break; |
| 936 | |
| 937 | default: |
| 938 | break; |
| 939 | } |
| 940 | } |
| 941 | |
| 942 | return TRUE; |
| 943 | } |
| 944 | |
| 945 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 946 | regular object. The current definition is in some section of the |
| 947 | dynamic object, but we're not including those sections. We have to |
| 948 | change the definition to something the rest of the link can |
| 949 | understand. */ |
| 950 | |
| 951 | static bfd_boolean |
| 952 | elf_vax_adjust_dynamic_symbol (info, h) |
| 953 | struct bfd_link_info *info; |
| 954 | struct elf_link_hash_entry *h; |
| 955 | { |
| 956 | bfd *dynobj; |
| 957 | asection *s; |
| 958 | unsigned int power_of_two; |
| 959 | |
| 960 | dynobj = elf_hash_table (info)->dynobj; |
| 961 | |
| 962 | /* Make sure we know what is going on here. */ |
| 963 | BFD_ASSERT (dynobj != NULL |
| 964 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) |
| 965 | || h->weakdef != NULL |
| 966 | || ((h->elf_link_hash_flags |
| 967 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 968 | && (h->elf_link_hash_flags |
| 969 | & ELF_LINK_HASH_REF_REGULAR) != 0 |
| 970 | && (h->elf_link_hash_flags |
| 971 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); |
| 972 | |
| 973 | /* If this is a function, put it in the procedure linkage table. We |
| 974 | will fill in the contents of the procedure linkage table later, |
| 975 | when we know the address of the .got section. */ |
| 976 | if (h->type == STT_FUNC |
| 977 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| 978 | { |
| 979 | if (! info->shared |
| 980 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 |
| 981 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 |
| 982 | /* We must always create the plt entry if it was referenced |
| 983 | by a PLTxxO relocation. In this case we already recorded |
| 984 | it as a dynamic symbol. */ |
| 985 | && h->dynindx == -1) |
| 986 | { |
| 987 | /* This case can occur if we saw a PLTxx reloc in an input |
| 988 | file, but the symbol was never referred to by a dynamic |
| 989 | object. In such a case, we don't actually need to build |
| 990 | a procedure linkage table, and we can just do a PCxx |
| 991 | reloc instead. */ |
| 992 | BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); |
| 993 | h->plt.offset = (bfd_vma) -1; |
| 994 | return TRUE; |
| 995 | } |
| 996 | |
| 997 | /* GC may have rendered this entry unused. */ |
| 998 | if (h->plt.refcount <= 0) |
| 999 | { |
| 1000 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 1001 | h->plt.offset = (bfd_vma) -1; |
| 1002 | return TRUE; |
| 1003 | } |
| 1004 | |
| 1005 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 1006 | if (h->dynindx == -1) |
| 1007 | { |
| 1008 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 1009 | return FALSE; |
| 1010 | } |
| 1011 | |
| 1012 | s = bfd_get_section_by_name (dynobj, ".plt"); |
| 1013 | BFD_ASSERT (s != NULL); |
| 1014 | |
| 1015 | /* If this is the first .plt entry, make room for the special |
| 1016 | first entry. */ |
| 1017 | if (s->_raw_size == 0) |
| 1018 | { |
| 1019 | s->_raw_size += PLT_ENTRY_SIZE; |
| 1020 | } |
| 1021 | |
| 1022 | /* If this symbol is not defined in a regular file, and we are |
| 1023 | not generating a shared library, then set the symbol to this |
| 1024 | location in the .plt. This is required to make function |
| 1025 | pointers compare as equal between the normal executable and |
| 1026 | the shared library. */ |
| 1027 | if (!info->shared |
| 1028 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 1029 | { |
| 1030 | h->root.u.def.section = s; |
| 1031 | h->root.u.def.value = s->_raw_size; |
| 1032 | } |
| 1033 | |
| 1034 | h->plt.offset = s->_raw_size; |
| 1035 | |
| 1036 | /* Make room for this entry. */ |
| 1037 | s->_raw_size += PLT_ENTRY_SIZE; |
| 1038 | |
| 1039 | /* We also need to make an entry in the .got.plt section, which |
| 1040 | will be placed in the .got section by the linker script. */ |
| 1041 | |
| 1042 | s = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 1043 | BFD_ASSERT (s != NULL); |
| 1044 | s->_raw_size += 4; |
| 1045 | |
| 1046 | /* We also need to make an entry in the .rela.plt section. */ |
| 1047 | |
| 1048 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 1049 | BFD_ASSERT (s != NULL); |
| 1050 | s->_raw_size += sizeof (Elf32_External_Rela); |
| 1051 | |
| 1052 | return TRUE; |
| 1053 | } |
| 1054 | |
| 1055 | /* Reinitialize the plt offset now that it is not used as a reference |
| 1056 | count any more. */ |
| 1057 | h->plt.offset = (bfd_vma) -1; |
| 1058 | |
| 1059 | /* If this is a weak symbol, and there is a real definition, the |
| 1060 | processor independent code will have arranged for us to see the |
| 1061 | real definition first, and we can just use the same value. */ |
| 1062 | if (h->weakdef != NULL) |
| 1063 | { |
| 1064 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
| 1065 | || h->weakdef->root.type == bfd_link_hash_defweak); |
| 1066 | h->root.u.def.section = h->weakdef->root.u.def.section; |
| 1067 | h->root.u.def.value = h->weakdef->root.u.def.value; |
| 1068 | return TRUE; |
| 1069 | } |
| 1070 | |
| 1071 | /* This is a reference to a symbol defined by a dynamic object which |
| 1072 | is not a function. */ |
| 1073 | |
| 1074 | /* If we are creating a shared library, we must presume that the |
| 1075 | only references to the symbol are via the global offset table. |
| 1076 | For such cases we need not do anything here; the relocations will |
| 1077 | be handled correctly by relocate_section. */ |
| 1078 | if (info->shared) |
| 1079 | return TRUE; |
| 1080 | |
| 1081 | /* We must allocate the symbol in our .dynbss section, which will |
| 1082 | become part of the .bss section of the executable. There will be |
| 1083 | an entry for this symbol in the .dynsym section. The dynamic |
| 1084 | object will contain position independent code, so all references |
| 1085 | from the dynamic object to this symbol will go through the global |
| 1086 | offset table. The dynamic linker will use the .dynsym entry to |
| 1087 | determine the address it must put in the global offset table, so |
| 1088 | both the dynamic object and the regular object will refer to the |
| 1089 | same memory location for the variable. */ |
| 1090 | |
| 1091 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 1092 | BFD_ASSERT (s != NULL); |
| 1093 | |
| 1094 | /* We must generate a R_VAX_COPY reloc to tell the dynamic linker to |
| 1095 | copy the initial value out of the dynamic object and into the |
| 1096 | runtime process image. We need to remember the offset into the |
| 1097 | .rela.bss section we are going to use. */ |
| 1098 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 1099 | { |
| 1100 | asection *srel; |
| 1101 | |
| 1102 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| 1103 | BFD_ASSERT (srel != NULL); |
| 1104 | srel->_raw_size += sizeof (Elf32_External_Rela); |
| 1105 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
| 1106 | } |
| 1107 | |
| 1108 | /* We need to figure out the alignment required for this symbol. I |
| 1109 | have no idea how ELF linkers handle this. */ |
| 1110 | power_of_two = bfd_log2 (h->size); |
| 1111 | if (power_of_two > 3) |
| 1112 | power_of_two = 3; |
| 1113 | |
| 1114 | /* Apply the required alignment. */ |
| 1115 | s->_raw_size = BFD_ALIGN (s->_raw_size, |
| 1116 | (bfd_size_type) (1 << power_of_two)); |
| 1117 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
| 1118 | { |
| 1119 | if (!bfd_set_section_alignment (dynobj, s, power_of_two)) |
| 1120 | return FALSE; |
| 1121 | } |
| 1122 | |
| 1123 | /* Define the symbol as being at this point in the section. */ |
| 1124 | h->root.u.def.section = s; |
| 1125 | h->root.u.def.value = s->_raw_size; |
| 1126 | |
| 1127 | /* Increment the section size to make room for the symbol. */ |
| 1128 | s->_raw_size += h->size; |
| 1129 | |
| 1130 | return TRUE; |
| 1131 | } |
| 1132 | |
| 1133 | /* Set the sizes of the dynamic sections. */ |
| 1134 | |
| 1135 | static bfd_boolean |
| 1136 | elf_vax_size_dynamic_sections (output_bfd, info) |
| 1137 | bfd *output_bfd; |
| 1138 | struct bfd_link_info *info; |
| 1139 | { |
| 1140 | bfd *dynobj; |
| 1141 | asection *s; |
| 1142 | bfd_boolean plt; |
| 1143 | bfd_boolean relocs; |
| 1144 | bfd_boolean reltext; |
| 1145 | |
| 1146 | dynobj = elf_hash_table (info)->dynobj; |
| 1147 | BFD_ASSERT (dynobj != NULL); |
| 1148 | |
| 1149 | if (elf_hash_table (info)->dynamic_sections_created) |
| 1150 | { |
| 1151 | /* Set the contents of the .interp section to the interpreter. */ |
| 1152 | if (!info->shared) |
| 1153 | { |
| 1154 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 1155 | BFD_ASSERT (s != NULL); |
| 1156 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 1157 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 1158 | } |
| 1159 | } |
| 1160 | else |
| 1161 | { |
| 1162 | /* We may have created entries in the .rela.got and .got sections. |
| 1163 | However, if we are not creating the dynamic sections, we will |
| 1164 | not actually use these entries. Reset the size of .rela.got |
| 1165 | and .got, which will cause it to get stripped from the output |
| 1166 | file below. */ |
| 1167 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 1168 | if (s != NULL) |
| 1169 | s->_raw_size = 0; |
| 1170 | s = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 1171 | if (s != NULL) |
| 1172 | s->_raw_size = 0; |
| 1173 | s = bfd_get_section_by_name (dynobj, ".got"); |
| 1174 | if (s != NULL) |
| 1175 | s->_raw_size = 0; |
| 1176 | } |
| 1177 | |
| 1178 | /* If this is a -Bsymbolic shared link, then we need to discard all PC |
| 1179 | relative relocs against symbols defined in a regular object. We |
| 1180 | allocated space for them in the check_relocs routine, but we will not |
| 1181 | fill them in in the relocate_section routine. */ |
| 1182 | if (info->shared && info->symbolic) |
| 1183 | elf_vax_link_hash_traverse (elf_vax_hash_table (info), |
| 1184 | elf_vax_discard_copies, |
| 1185 | (PTR) NULL); |
| 1186 | |
| 1187 | /* If this is a -Bsymbolic shared link or a static link, we need to |
| 1188 | discard all the got entries we've recorded. Otherwise, we need to |
| 1189 | instantiate (allocate space for them). */ |
| 1190 | elf_link_hash_traverse (elf_hash_table (info), |
| 1191 | elf_vax_instantiate_got_entries, |
| 1192 | (PTR) info); |
| 1193 | |
| 1194 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 1195 | determined the sizes of the various dynamic sections. Allocate |
| 1196 | memory for them. */ |
| 1197 | plt = FALSE; |
| 1198 | relocs = FALSE; |
| 1199 | reltext = FALSE; |
| 1200 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 1201 | { |
| 1202 | const char *name; |
| 1203 | bfd_boolean strip; |
| 1204 | |
| 1205 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 1206 | continue; |
| 1207 | |
| 1208 | /* It's OK to base decisions on the section name, because none |
| 1209 | of the dynobj section names depend upon the input files. */ |
| 1210 | name = bfd_get_section_name (dynobj, s); |
| 1211 | |
| 1212 | strip = FALSE; |
| 1213 | |
| 1214 | if (strcmp (name, ".plt") == 0) |
| 1215 | { |
| 1216 | if (s->_raw_size == 0) |
| 1217 | { |
| 1218 | /* Strip this section if we don't need it; see the |
| 1219 | comment below. */ |
| 1220 | strip = TRUE; |
| 1221 | } |
| 1222 | else |
| 1223 | { |
| 1224 | /* Remember whether there is a PLT. */ |
| 1225 | plt = TRUE; |
| 1226 | } |
| 1227 | } |
| 1228 | else if (strncmp (name, ".rela", 5) == 0) |
| 1229 | { |
| 1230 | if (s->_raw_size == 0) |
| 1231 | { |
| 1232 | /* If we don't need this section, strip it from the |
| 1233 | output file. This is mostly to handle .rela.bss and |
| 1234 | .rela.plt. We must create both sections in |
| 1235 | create_dynamic_sections, because they must be created |
| 1236 | before the linker maps input sections to output |
| 1237 | sections. The linker does that before |
| 1238 | adjust_dynamic_symbol is called, and it is that |
| 1239 | function which decides whether anything needs to go |
| 1240 | into these sections. */ |
| 1241 | strip = TRUE; |
| 1242 | } |
| 1243 | else |
| 1244 | { |
| 1245 | asection *target; |
| 1246 | |
| 1247 | /* Remember whether there are any reloc sections other |
| 1248 | than .rela.plt. */ |
| 1249 | if (strcmp (name, ".rela.plt") != 0) |
| 1250 | { |
| 1251 | const char *outname; |
| 1252 | |
| 1253 | relocs = TRUE; |
| 1254 | |
| 1255 | /* If this relocation section applies to a read only |
| 1256 | section, then we probably need a DT_TEXTREL |
| 1257 | entry. .rela.plt is actually associated with |
| 1258 | .got.plt, which is never readonly. */ |
| 1259 | outname = bfd_get_section_name (output_bfd, |
| 1260 | s->output_section); |
| 1261 | target = bfd_get_section_by_name (output_bfd, outname + 5); |
| 1262 | if (target != NULL |
| 1263 | && (target->flags & SEC_READONLY) != 0 |
| 1264 | && (target->flags & SEC_ALLOC) != 0) |
| 1265 | reltext = TRUE; |
| 1266 | } |
| 1267 | |
| 1268 | /* We use the reloc_count field as a counter if we need |
| 1269 | to copy relocs into the output file. */ |
| 1270 | s->reloc_count = 0; |
| 1271 | } |
| 1272 | } |
| 1273 | else if (strncmp (name, ".got", 4) != 0) |
| 1274 | { |
| 1275 | /* It's not one of our sections, so don't allocate space. */ |
| 1276 | continue; |
| 1277 | } |
| 1278 | |
| 1279 | if (strip) |
| 1280 | { |
| 1281 | _bfd_strip_section_from_output (info, s); |
| 1282 | continue; |
| 1283 | } |
| 1284 | |
| 1285 | /* Allocate memory for the section contents. */ |
| 1286 | s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size); |
| 1287 | if (s->contents == NULL && s->_raw_size != 0) |
| 1288 | return FALSE; |
| 1289 | } |
| 1290 | |
| 1291 | if (elf_hash_table (info)->dynamic_sections_created) |
| 1292 | { |
| 1293 | /* Add some entries to the .dynamic section. We fill in the |
| 1294 | values later, in elf_vax_finish_dynamic_sections, but we |
| 1295 | must add the entries now so that we get the correct size for |
| 1296 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 1297 | dynamic linker and used by the debugger. */ |
| 1298 | #define add_dynamic_entry(TAG, VAL) \ |
| 1299 | bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) |
| 1300 | |
| 1301 | if (!info->shared) |
| 1302 | { |
| 1303 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 1304 | return FALSE; |
| 1305 | } |
| 1306 | |
| 1307 | if (plt) |
| 1308 | { |
| 1309 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 1310 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 1311 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 1312 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 1313 | return FALSE; |
| 1314 | } |
| 1315 | |
| 1316 | if (relocs) |
| 1317 | { |
| 1318 | if (!add_dynamic_entry (DT_RELA, 0) |
| 1319 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 1320 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) |
| 1321 | return FALSE; |
| 1322 | } |
| 1323 | |
| 1324 | if (reltext || (info->flags & DF_TEXTREL) != 0) |
| 1325 | { |
| 1326 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 1327 | return FALSE; |
| 1328 | } |
| 1329 | } |
| 1330 | #undef add_dynamic_entry |
| 1331 | |
| 1332 | return TRUE; |
| 1333 | } |
| 1334 | |
| 1335 | /* This function is called via elf_vax_link_hash_traverse if we are |
| 1336 | creating a shared object with -Bsymbolic. It discards the space |
| 1337 | allocated to copy PC relative relocs against symbols which are defined |
| 1338 | in regular objects. We allocated space for them in the check_relocs |
| 1339 | routine, but we won't fill them in in the relocate_section routine. */ |
| 1340 | |
| 1341 | /*ARGSUSED*/ |
| 1342 | static bfd_boolean |
| 1343 | elf_vax_discard_copies (h, ignore) |
| 1344 | struct elf_vax_link_hash_entry *h; |
| 1345 | PTR ignore ATTRIBUTE_UNUSED; |
| 1346 | { |
| 1347 | struct elf_vax_pcrel_relocs_copied *s; |
| 1348 | |
| 1349 | if (h->root.root.type == bfd_link_hash_warning) |
| 1350 | h = (struct elf_vax_link_hash_entry *) h->root.root.u.i.link; |
| 1351 | |
| 1352 | /* We only discard relocs for symbols defined in a regular object. */ |
| 1353 | if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 1354 | return TRUE; |
| 1355 | |
| 1356 | for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) |
| 1357 | s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela); |
| 1358 | |
| 1359 | return TRUE; |
| 1360 | } |
| 1361 | |
| 1362 | /* This function is called via elf_link_hash_traverse. It looks for entries |
| 1363 | that have GOT or PLT (.GOT) references. If creating a static object or a |
| 1364 | shared object with -Bsymbolic, it resets the reference count back to 0 |
| 1365 | and sets the offset to -1 so normal PC32 relocation will be done. If |
| 1366 | creating a shared object or executable, space in the .got and .rela.got |
| 1367 | will be reserved for the symbol. */ |
| 1368 | |
| 1369 | /*ARGSUSED*/ |
| 1370 | static bfd_boolean |
| 1371 | elf_vax_instantiate_got_entries (h, infoptr) |
| 1372 | struct elf_link_hash_entry *h; |
| 1373 | PTR infoptr; |
| 1374 | { |
| 1375 | struct bfd_link_info *info = (struct bfd_link_info *) infoptr; |
| 1376 | bfd *dynobj; |
| 1377 | asection *sgot; |
| 1378 | asection *srelgot; |
| 1379 | |
| 1380 | /* We don't care about non-GOT (and non-PLT) entries. */ |
| 1381 | if (h->got.refcount <= 0 && h->plt.refcount <= 0) |
| 1382 | return TRUE; |
| 1383 | |
| 1384 | dynobj = elf_hash_table (info)->dynobj; |
| 1385 | if (dynobj == NULL) |
| 1386 | return TRUE; |
| 1387 | |
| 1388 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1389 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 1390 | |
| 1391 | if (!elf_hash_table (info)->dynamic_sections_created |
| 1392 | || (info->shared && info->symbolic)) |
| 1393 | { |
| 1394 | h->got.refcount = 0; |
| 1395 | h->got.offset = (bfd_vma) -1; |
| 1396 | h->plt.refcount = 0; |
| 1397 | h->plt.offset = (bfd_vma) -1; |
| 1398 | } |
| 1399 | else if (h->got.refcount > 0) |
| 1400 | { |
| 1401 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 1402 | if (h->dynindx == -1) |
| 1403 | { |
| 1404 | if (!bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 1405 | return FALSE; |
| 1406 | } |
| 1407 | |
| 1408 | /* Allocate space in the .got and .rela.got sections. */ |
| 1409 | sgot->_raw_size += 4; |
| 1410 | srelgot->_raw_size += sizeof (Elf32_External_Rela); |
| 1411 | } |
| 1412 | |
| 1413 | return TRUE; |
| 1414 | } |
| 1415 | |
| 1416 | /* Relocate an VAX ELF section. */ |
| 1417 | |
| 1418 | static bfd_boolean |
| 1419 | elf_vax_relocate_section (output_bfd, info, input_bfd, input_section, |
| 1420 | contents, relocs, local_syms, local_sections) |
| 1421 | bfd *output_bfd; |
| 1422 | struct bfd_link_info *info; |
| 1423 | bfd *input_bfd; |
| 1424 | asection *input_section; |
| 1425 | bfd_byte *contents; |
| 1426 | Elf_Internal_Rela *relocs; |
| 1427 | Elf_Internal_Sym *local_syms; |
| 1428 | asection **local_sections; |
| 1429 | { |
| 1430 | bfd *dynobj; |
| 1431 | Elf_Internal_Shdr *symtab_hdr; |
| 1432 | struct elf_link_hash_entry **sym_hashes; |
| 1433 | bfd_vma *local_got_offsets; |
| 1434 | bfd_vma plt_index; |
| 1435 | bfd_vma got_offset; |
| 1436 | asection *sgot; |
| 1437 | asection *splt; |
| 1438 | asection *sgotplt; |
| 1439 | asection *sreloc; |
| 1440 | Elf_Internal_Rela *rel; |
| 1441 | Elf_Internal_Rela *relend; |
| 1442 | |
| 1443 | if (info->relocatable) |
| 1444 | return TRUE; |
| 1445 | |
| 1446 | dynobj = elf_hash_table (info)->dynobj; |
| 1447 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1448 | sym_hashes = elf_sym_hashes (input_bfd); |
| 1449 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 1450 | |
| 1451 | sgot = NULL; |
| 1452 | splt = NULL; |
| 1453 | sgotplt = NULL; |
| 1454 | sreloc = NULL; |
| 1455 | |
| 1456 | rel = relocs; |
| 1457 | relend = relocs + input_section->reloc_count; |
| 1458 | for (; rel < relend; rel++) |
| 1459 | { |
| 1460 | int r_type; |
| 1461 | reloc_howto_type *howto; |
| 1462 | unsigned long r_symndx; |
| 1463 | struct elf_link_hash_entry *h; |
| 1464 | Elf_Internal_Sym *sym; |
| 1465 | asection *sec; |
| 1466 | bfd_vma relocation; |
| 1467 | bfd_reloc_status_type r; |
| 1468 | |
| 1469 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1470 | if (r_type < 0 || r_type >= (int) R_VAX_max) |
| 1471 | { |
| 1472 | bfd_set_error (bfd_error_bad_value); |
| 1473 | return FALSE; |
| 1474 | } |
| 1475 | howto = howto_table + r_type; |
| 1476 | |
| 1477 | /* This is a final link. */ |
| 1478 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1479 | h = NULL; |
| 1480 | sym = NULL; |
| 1481 | sec = NULL; |
| 1482 | if (r_symndx < symtab_hdr->sh_info) |
| 1483 | { |
| 1484 | sym = local_syms + r_symndx; |
| 1485 | sec = local_sections[r_symndx]; |
| 1486 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
| 1487 | } |
| 1488 | else |
| 1489 | { |
| 1490 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1491 | while (h->root.type == bfd_link_hash_indirect |
| 1492 | || h->root.type == bfd_link_hash_warning) |
| 1493 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1494 | if (h->root.type == bfd_link_hash_defined |
| 1495 | || h->root.type == bfd_link_hash_defweak) |
| 1496 | { |
| 1497 | sec = h->root.u.def.section; |
| 1498 | if ((r_type == R_VAX_PLT32 |
| 1499 | && h->plt.offset != (bfd_vma) -1 |
| 1500 | && elf_hash_table (info)->dynamic_sections_created) |
| 1501 | || (r_type == R_VAX_GOT32 |
| 1502 | && strcmp (h->root.root.string, |
| 1503 | "_GLOBAL_OFFSET_TABLE_") != 0 |
| 1504 | && elf_hash_table (info)->dynamic_sections_created |
| 1505 | && (! info->shared |
| 1506 | || (! info->symbolic && h->dynindx != -1) |
| 1507 | || (h->elf_link_hash_flags |
| 1508 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| 1509 | || (info->shared |
| 1510 | && ((! info->symbolic && h->dynindx != -1) |
| 1511 | || (h->elf_link_hash_flags |
| 1512 | & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 1513 | && ((input_section->flags & SEC_ALLOC) != 0 |
| 1514 | /* DWARF will emit R_VAX_32 relocations in its |
| 1515 | sections against symbols defined externally |
| 1516 | in shared libraries. We can't do anything |
| 1517 | with them here. */ |
| 1518 | |
| 1519 | || ((input_section->flags & SEC_DEBUGGING) != 0 |
| 1520 | && (h->elf_link_hash_flags |
| 1521 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) |
| 1522 | && (r_type == R_VAX_8 |
| 1523 | || r_type == R_VAX_16 |
| 1524 | || r_type == R_VAX_32 |
| 1525 | || r_type == R_VAX_PC8 |
| 1526 | || r_type == R_VAX_PC16 |
| 1527 | || r_type == R_VAX_PC32))) |
| 1528 | { |
| 1529 | /* In these cases, we don't need the relocation |
| 1530 | value. We check specially because in some |
| 1531 | obscure cases sec->output_section will be NULL. */ |
| 1532 | relocation = 0; |
| 1533 | } |
| 1534 | else |
| 1535 | relocation = (h->root.u.def.value |
| 1536 | + sec->output_section->vma |
| 1537 | + sec->output_offset); |
| 1538 | } |
| 1539 | else if (h->root.type == bfd_link_hash_undefweak) |
| 1540 | relocation = 0; |
| 1541 | else if (info->shared |
| 1542 | && !info->no_undefined |
| 1543 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
| 1544 | relocation = 0; |
| 1545 | else |
| 1546 | { |
| 1547 | if (!(info->callbacks->undefined_symbol |
| 1548 | (info, h->root.root.string, input_bfd, |
| 1549 | input_section, rel->r_offset, |
| 1550 | (!info->shared || info->no_undefined |
| 1551 | || ELF_ST_VISIBILITY (h->other))))) |
| 1552 | return FALSE; |
| 1553 | relocation = 0; |
| 1554 | } |
| 1555 | } |
| 1556 | |
| 1557 | switch (r_type) |
| 1558 | { |
| 1559 | case R_VAX_GOT32: |
| 1560 | /* Relocation is to the address of the entry for this symbol |
| 1561 | in the global offset table. */ |
| 1562 | if (h == NULL || h->got.offset == (bfd_vma) -1) |
| 1563 | break; |
| 1564 | |
| 1565 | /* Relocation is the offset of the entry for this symbol in |
| 1566 | the global offset table. */ |
| 1567 | |
| 1568 | { |
| 1569 | bfd_vma off; |
| 1570 | |
| 1571 | if (sgot == NULL) |
| 1572 | { |
| 1573 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1574 | BFD_ASSERT (sgot != NULL); |
| 1575 | } |
| 1576 | |
| 1577 | BFD_ASSERT (h != NULL); |
| 1578 | off = h->got.offset; |
| 1579 | BFD_ASSERT (off != (bfd_vma) -1); |
| 1580 | BFD_ASSERT (off < sgot->_raw_size); |
| 1581 | |
| 1582 | if (info->shared |
| 1583 | && h->dynindx == -1 |
| 1584 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
| 1585 | { |
| 1586 | /* The symbol was forced to be local |
| 1587 | because of a version file.. We must initialize |
| 1588 | this entry in the global offset table. Since |
| 1589 | the offset must always be a multiple of 4, we |
| 1590 | use the least significant bit to record whether |
| 1591 | we have initialized it already. |
| 1592 | |
| 1593 | When doing a dynamic link, we create a .rela.got |
| 1594 | relocation entry to initialize the value. This |
| 1595 | is done in the finish_dynamic_symbol routine. */ |
| 1596 | if ((off & 1) != 0) |
| 1597 | off &= ~1; |
| 1598 | else |
| 1599 | { |
| 1600 | bfd_put_32 (output_bfd, relocation + rel->r_addend, |
| 1601 | sgot->contents + off); |
| 1602 | h->got.offset |= 1; |
| 1603 | } |
| 1604 | } else { |
| 1605 | bfd_put_32 (output_bfd, rel->r_addend, sgot->contents + off); |
| 1606 | } |
| 1607 | |
| 1608 | relocation = sgot->output_offset + off; |
| 1609 | /* The GOT relocation uses the addend. */ |
| 1610 | rel->r_addend = 0; |
| 1611 | |
| 1612 | /* Change the reference to be indirect. */ |
| 1613 | contents[rel->r_offset - 1] |= 0x10; |
| 1614 | relocation += sgot->output_section->vma; |
| 1615 | } |
| 1616 | break; |
| 1617 | |
| 1618 | case R_VAX_PLT32: |
| 1619 | /* Relocation is to the entry for this symbol in the |
| 1620 | procedure linkage table. */ |
| 1621 | |
| 1622 | /* Resolve a PLTxx reloc against a local symbol directly, |
| 1623 | without using the procedure linkage table. */ |
| 1624 | if (h == NULL) |
| 1625 | break; |
| 1626 | |
| 1627 | if (h->plt.offset == (bfd_vma) -1 |
| 1628 | || !elf_hash_table (info)->dynamic_sections_created) |
| 1629 | { |
| 1630 | /* We didn't make a PLT entry for this symbol. This |
| 1631 | happens when statically linking PIC code, or when |
| 1632 | using -Bsymbolic. */ |
| 1633 | break; |
| 1634 | } |
| 1635 | |
| 1636 | if (splt == NULL) |
| 1637 | { |
| 1638 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 1639 | BFD_ASSERT (splt != NULL); |
| 1640 | } |
| 1641 | |
| 1642 | if (sgotplt == NULL) |
| 1643 | { |
| 1644 | sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 1645 | BFD_ASSERT (splt != NULL); |
| 1646 | } |
| 1647 | |
| 1648 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; |
| 1649 | |
| 1650 | /* Get the offset into the .got table of the entry that |
| 1651 | corresponds to this function. Each .got entry is 4 bytes. |
| 1652 | The first two are reserved. */ |
| 1653 | got_offset = (plt_index + 3) * 4; |
| 1654 | |
| 1655 | /* We want the relocate to point into the .got.plt instead |
| 1656 | of the plt itself. */ |
| 1657 | relocation = (sgotplt->output_section->vma |
| 1658 | + sgotplt->output_offset |
| 1659 | + got_offset); |
| 1660 | contents[rel->r_offset-1] |= 0x10; /* make indirect */ |
| 1661 | if (rel->r_addend == 2) |
| 1662 | { |
| 1663 | h->plt.offset |= 1; |
| 1664 | } |
| 1665 | else if (rel->r_addend != 0) |
| 1666 | (*_bfd_error_handler) |
| 1667 | (_("%s: warning: PLT addend of %d to `%s' from %s section ignored"), |
| 1668 | bfd_get_filename (input_bfd), rel->r_addend, |
| 1669 | h->root.root.string, |
| 1670 | bfd_get_section_name (input_bfd, input_section)); |
| 1671 | rel->r_addend = 0; |
| 1672 | |
| 1673 | break; |
| 1674 | |
| 1675 | case R_VAX_PC8: |
| 1676 | case R_VAX_PC16: |
| 1677 | case R_VAX_PC32: |
| 1678 | if (h == NULL) |
| 1679 | break; |
| 1680 | /* Fall through. */ |
| 1681 | case R_VAX_8: |
| 1682 | case R_VAX_16: |
| 1683 | case R_VAX_32: |
| 1684 | if (info->shared |
| 1685 | && r_symndx != 0 |
| 1686 | && (input_section->flags & SEC_ALLOC) != 0 |
| 1687 | && ((r_type != R_VAX_PC8 |
| 1688 | && r_type != R_VAX_PC16 |
| 1689 | && r_type != R_VAX_PC32) |
| 1690 | || (!info->symbolic |
| 1691 | || (h->elf_link_hash_flags |
| 1692 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) |
| 1693 | { |
| 1694 | Elf_Internal_Rela outrel; |
| 1695 | bfd_byte *loc; |
| 1696 | bfd_boolean skip, relocate; |
| 1697 | |
| 1698 | /* When generating a shared object, these relocations |
| 1699 | are copied into the output file to be resolved at run |
| 1700 | time. */ |
| 1701 | if (sreloc == NULL) |
| 1702 | { |
| 1703 | const char *name; |
| 1704 | |
| 1705 | name = (bfd_elf_string_from_elf_section |
| 1706 | (input_bfd, |
| 1707 | elf_elfheader (input_bfd)->e_shstrndx, |
| 1708 | elf_section_data (input_section)->rel_hdr.sh_name)); |
| 1709 | if (name == NULL) |
| 1710 | return FALSE; |
| 1711 | |
| 1712 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 1713 | && strcmp (bfd_get_section_name (input_bfd, |
| 1714 | input_section), |
| 1715 | name + 5) == 0); |
| 1716 | |
| 1717 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 1718 | BFD_ASSERT (sreloc != NULL); |
| 1719 | } |
| 1720 | |
| 1721 | skip = FALSE; |
| 1722 | relocate = FALSE; |
| 1723 | |
| 1724 | outrel.r_offset = |
| 1725 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 1726 | rel->r_offset); |
| 1727 | if (outrel.r_offset == (bfd_vma) -1) |
| 1728 | skip = TRUE; |
| 1729 | if (outrel.r_offset == (bfd_vma) -2) |
| 1730 | skip = TRUE, relocate = TRUE; |
| 1731 | outrel.r_offset += (input_section->output_section->vma |
| 1732 | + input_section->output_offset); |
| 1733 | |
| 1734 | if (skip) |
| 1735 | memset (&outrel, 0, sizeof outrel); |
| 1736 | /* h->dynindx may be -1 if the symbol was marked to |
| 1737 | become local. */ |
| 1738 | else if (h != NULL |
| 1739 | && ((! info->symbolic && h->dynindx != -1) |
| 1740 | || (h->elf_link_hash_flags |
| 1741 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| 1742 | { |
| 1743 | BFD_ASSERT (h->dynindx != -1); |
| 1744 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 1745 | outrel.r_addend = relocation + rel->r_addend; |
| 1746 | } |
| 1747 | else |
| 1748 | { |
| 1749 | if (r_type == R_VAX_32) |
| 1750 | { |
| 1751 | relocate = TRUE; |
| 1752 | outrel.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE); |
| 1753 | BFD_ASSERT (bfd_get_signed_32 (input_bfd, |
| 1754 | &contents[rel->r_offset]) == 0); |
| 1755 | outrel.r_addend = relocation + rel->r_addend; |
| 1756 | } |
| 1757 | else |
| 1758 | { |
| 1759 | long indx; |
| 1760 | |
| 1761 | if (h == NULL) |
| 1762 | sec = local_sections[r_symndx]; |
| 1763 | else |
| 1764 | { |
| 1765 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
| 1766 | || (h->root.type |
| 1767 | == bfd_link_hash_defweak)); |
| 1768 | sec = h->root.u.def.section; |
| 1769 | } |
| 1770 | if (sec != NULL && bfd_is_abs_section (sec)) |
| 1771 | indx = 0; |
| 1772 | else if (sec == NULL || sec->owner == NULL) |
| 1773 | { |
| 1774 | bfd_set_error (bfd_error_bad_value); |
| 1775 | return FALSE; |
| 1776 | } |
| 1777 | else |
| 1778 | { |
| 1779 | asection *osec; |
| 1780 | |
| 1781 | osec = sec->output_section; |
| 1782 | indx = elf_section_data (osec)->dynindx; |
| 1783 | BFD_ASSERT (indx > 0); |
| 1784 | } |
| 1785 | |
| 1786 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
| 1787 | outrel.r_addend = relocation + rel->r_addend; |
| 1788 | } |
| 1789 | } |
| 1790 | |
| 1791 | if (!strcmp (bfd_get_section_name (input_bfd, input_section), |
| 1792 | ".text") != 0 || |
| 1793 | (info->shared |
| 1794 | && ELF32_R_TYPE(outrel.r_info) != R_VAX_32 |
| 1795 | && ELF32_R_TYPE(outrel.r_info) != R_VAX_RELATIVE |
| 1796 | && ELF32_R_TYPE(outrel.r_info) != R_VAX_COPY |
| 1797 | && ELF32_R_TYPE(outrel.r_info) != R_VAX_JMP_SLOT |
| 1798 | && ELF32_R_TYPE(outrel.r_info) != R_VAX_GLOB_DAT)) |
| 1799 | { |
| 1800 | if (h != NULL) |
| 1801 | (*_bfd_error_handler) |
| 1802 | (_("%s: warning: %s relocation against symbol `%s' from %s section"), |
| 1803 | bfd_get_filename (input_bfd), howto->name, |
| 1804 | h->root.root.string, |
| 1805 | bfd_get_section_name (input_bfd, input_section)); |
| 1806 | else |
| 1807 | (*_bfd_error_handler) |
| 1808 | (_("%s: warning: %s relocation to 0x%x from %s section"), |
| 1809 | bfd_get_filename (input_bfd), howto->name, |
| 1810 | outrel.r_addend, |
| 1811 | bfd_get_section_name (input_bfd, input_section)); |
| 1812 | } |
| 1813 | loc = sreloc->contents; |
| 1814 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); |
| 1815 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 1816 | |
| 1817 | /* This reloc will be computed at runtime, so there's no |
| 1818 | need to do anything now, except for R_VAX_32 |
| 1819 | relocations that have been turned into |
| 1820 | R_VAX_RELATIVE. */ |
| 1821 | if (!relocate) |
| 1822 | continue; |
| 1823 | } |
| 1824 | |
| 1825 | break; |
| 1826 | |
| 1827 | case R_VAX_GNU_VTINHERIT: |
| 1828 | case R_VAX_GNU_VTENTRY: |
| 1829 | /* These are no-ops in the end. */ |
| 1830 | continue; |
| 1831 | |
| 1832 | default: |
| 1833 | break; |
| 1834 | } |
| 1835 | |
| 1836 | /* VAX PCREL relocations are from the end of relocation, not the start. |
| 1837 | So subtract the difference from the relocation amount since we can't |
| 1838 | add it to the offset. */ |
| 1839 | if (howto->pc_relative && howto->pcrel_offset) |
| 1840 | relocation -= bfd_get_reloc_size(howto); |
| 1841 | |
| 1842 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 1843 | contents, rel->r_offset, |
| 1844 | relocation, rel->r_addend); |
| 1845 | |
| 1846 | if (r != bfd_reloc_ok) |
| 1847 | { |
| 1848 | switch (r) |
| 1849 | { |
| 1850 | default: |
| 1851 | case bfd_reloc_outofrange: |
| 1852 | abort (); |
| 1853 | case bfd_reloc_overflow: |
| 1854 | { |
| 1855 | const char *name; |
| 1856 | |
| 1857 | if (h != NULL) |
| 1858 | name = h->root.root.string; |
| 1859 | else |
| 1860 | { |
| 1861 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 1862 | symtab_hdr->sh_link, |
| 1863 | sym->st_name); |
| 1864 | if (name == NULL) |
| 1865 | return FALSE; |
| 1866 | if (*name == '\0') |
| 1867 | name = bfd_section_name (input_bfd, sec); |
| 1868 | } |
| 1869 | if (!(info->callbacks->reloc_overflow |
| 1870 | (info, name, howto->name, (bfd_vma) 0, |
| 1871 | input_bfd, input_section, rel->r_offset))) |
| 1872 | return FALSE; |
| 1873 | } |
| 1874 | break; |
| 1875 | } |
| 1876 | } |
| 1877 | } |
| 1878 | |
| 1879 | return TRUE; |
| 1880 | } |
| 1881 | |
| 1882 | /* Finish up dynamic symbol handling. We set the contents of various |
| 1883 | dynamic sections here. */ |
| 1884 | |
| 1885 | static bfd_boolean |
| 1886 | elf_vax_finish_dynamic_symbol (output_bfd, info, h, sym) |
| 1887 | bfd *output_bfd; |
| 1888 | struct bfd_link_info *info; |
| 1889 | struct elf_link_hash_entry *h; |
| 1890 | Elf_Internal_Sym *sym; |
| 1891 | { |
| 1892 | bfd *dynobj; |
| 1893 | |
| 1894 | dynobj = elf_hash_table (info)->dynobj; |
| 1895 | |
| 1896 | if (h->plt.offset != (bfd_vma) -1) |
| 1897 | { |
| 1898 | asection *splt; |
| 1899 | asection *sgot; |
| 1900 | asection *srela; |
| 1901 | bfd_vma plt_index; |
| 1902 | bfd_vma got_offset; |
| 1903 | bfd_vma addend; |
| 1904 | Elf_Internal_Rela rela; |
| 1905 | bfd_byte *loc; |
| 1906 | |
| 1907 | /* This symbol has an entry in the procedure linkage table. Set |
| 1908 | it up. */ |
| 1909 | BFD_ASSERT (h->dynindx != -1); |
| 1910 | |
| 1911 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 1912 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 1913 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 1914 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); |
| 1915 | |
| 1916 | addend = 2 * (h->plt.offset & 1); |
| 1917 | h->plt.offset &= ~1; |
| 1918 | |
| 1919 | /* Get the index in the procedure linkage table which |
| 1920 | corresponds to this symbol. This is the index of this symbol |
| 1921 | in all the symbols for which we are making plt entries. The |
| 1922 | first entry in the procedure linkage table is reserved. */ |
| 1923 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; |
| 1924 | |
| 1925 | /* Get the offset into the .got table of the entry that |
| 1926 | corresponds to this function. Each .got entry is 4 bytes. |
| 1927 | The first two are reserved. */ |
| 1928 | got_offset = (plt_index + 3) * 4; |
| 1929 | |
| 1930 | /* Fill in the entry in the procedure linkage table. */ |
| 1931 | memcpy (splt->contents + h->plt.offset, elf_vax_plt_entry, |
| 1932 | PLT_ENTRY_SIZE); |
| 1933 | |
| 1934 | /* The offset is relative to the first extension word. */ |
| 1935 | bfd_put_32 (output_bfd, |
| 1936 | -(h->plt.offset + 8), |
| 1937 | splt->contents + h->plt.offset + 4); |
| 1938 | |
| 1939 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), |
| 1940 | splt->contents + h->plt.offset + 8); |
| 1941 | |
| 1942 | /* Fill in the entry in the global offset table. */ |
| 1943 | bfd_put_32 (output_bfd, |
| 1944 | (splt->output_section->vma |
| 1945 | + splt->output_offset |
| 1946 | + h->plt.offset) + addend, |
| 1947 | sgot->contents + got_offset); |
| 1948 | |
| 1949 | /* Fill in the entry in the .rela.plt section. */ |
| 1950 | rela.r_offset = (sgot->output_section->vma |
| 1951 | + sgot->output_offset |
| 1952 | + got_offset); |
| 1953 | rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_JMP_SLOT); |
| 1954 | rela.r_addend = addend; |
| 1955 | loc = srela->contents + plt_index * sizeof (Elf32_External_Rela); |
| 1956 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 1957 | |
| 1958 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 1959 | { |
| 1960 | /* Mark the symbol as undefined, rather than as defined in |
| 1961 | the .plt section. Leave the value alone. */ |
| 1962 | sym->st_shndx = SHN_UNDEF; |
| 1963 | } |
| 1964 | } |
| 1965 | |
| 1966 | if (h->got.offset != (bfd_vma) -1) |
| 1967 | { |
| 1968 | asection *sgot; |
| 1969 | asection *srela; |
| 1970 | Elf_Internal_Rela rela; |
| 1971 | bfd_byte *loc; |
| 1972 | |
| 1973 | /* This symbol has an entry in the global offset table. Set it |
| 1974 | up. */ |
| 1975 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1976 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 1977 | BFD_ASSERT (sgot != NULL && srela != NULL); |
| 1978 | |
| 1979 | rela.r_offset = (sgot->output_section->vma |
| 1980 | + sgot->output_offset |
| 1981 | + (h->got.offset &~ 1)); |
| 1982 | |
| 1983 | /* If the symbol was forced to be local because of a version file |
| 1984 | locally we just want to emit a RELATIVE reloc. The entry in |
| 1985 | the global offset table will already have been initialized in |
| 1986 | the relocate_section function. */ |
| 1987 | if (info->shared |
| 1988 | && h->dynindx == -1 |
| 1989 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
| 1990 | { |
| 1991 | rela.r_info = ELF32_R_INFO (0, R_VAX_RELATIVE); |
| 1992 | } |
| 1993 | else |
| 1994 | { |
| 1995 | rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_GLOB_DAT); |
| 1996 | } |
| 1997 | rela.r_addend = bfd_get_signed_32 (output_bfd, |
| 1998 | (sgot->contents |
| 1999 | + (h->got.offset & ~1))); |
| 2000 | |
| 2001 | loc = srela->contents; |
| 2002 | loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); |
| 2003 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 2004 | } |
| 2005 | |
| 2006 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
| 2007 | { |
| 2008 | asection *s; |
| 2009 | Elf_Internal_Rela rela; |
| 2010 | bfd_byte *loc; |
| 2011 | |
| 2012 | /* This symbol needs a copy reloc. Set it up. */ |
| 2013 | BFD_ASSERT (h->dynindx != -1 |
| 2014 | && (h->root.type == bfd_link_hash_defined |
| 2015 | || h->root.type == bfd_link_hash_defweak)); |
| 2016 | |
| 2017 | s = bfd_get_section_by_name (h->root.u.def.section->owner, |
| 2018 | ".rela.bss"); |
| 2019 | BFD_ASSERT (s != NULL); |
| 2020 | |
| 2021 | rela.r_offset = (h->root.u.def.value |
| 2022 | + h->root.u.def.section->output_section->vma |
| 2023 | + h->root.u.def.section->output_offset); |
| 2024 | rela.r_info = ELF32_R_INFO (h->dynindx, R_VAX_COPY); |
| 2025 | rela.r_addend = 0; |
| 2026 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 2027 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 2028 | } |
| 2029 | |
| 2030 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 2031 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 2032 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 2033 | sym->st_shndx = SHN_ABS; |
| 2034 | |
| 2035 | return TRUE; |
| 2036 | } |
| 2037 | |
| 2038 | /* Finish up the dynamic sections. */ |
| 2039 | |
| 2040 | static bfd_boolean |
| 2041 | elf_vax_finish_dynamic_sections (output_bfd, info) |
| 2042 | bfd *output_bfd; |
| 2043 | struct bfd_link_info *info; |
| 2044 | { |
| 2045 | bfd *dynobj; |
| 2046 | asection *sgot; |
| 2047 | asection *sdyn; |
| 2048 | |
| 2049 | dynobj = elf_hash_table (info)->dynobj; |
| 2050 | |
| 2051 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 2052 | BFD_ASSERT (sgot != NULL); |
| 2053 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 2054 | |
| 2055 | if (elf_hash_table (info)->dynamic_sections_created) |
| 2056 | { |
| 2057 | asection *splt; |
| 2058 | Elf32_External_Dyn *dyncon, *dynconend; |
| 2059 | |
| 2060 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 2061 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
| 2062 | |
| 2063 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 2064 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| 2065 | for (; dyncon < dynconend; dyncon++) |
| 2066 | { |
| 2067 | Elf_Internal_Dyn dyn; |
| 2068 | const char *name; |
| 2069 | asection *s; |
| 2070 | |
| 2071 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 2072 | |
| 2073 | switch (dyn.d_tag) |
| 2074 | { |
| 2075 | default: |
| 2076 | break; |
| 2077 | |
| 2078 | case DT_PLTGOT: |
| 2079 | name = ".got"; |
| 2080 | goto get_vma; |
| 2081 | case DT_JMPREL: |
| 2082 | name = ".rela.plt"; |
| 2083 | get_vma: |
| 2084 | s = bfd_get_section_by_name (output_bfd, name); |
| 2085 | BFD_ASSERT (s != NULL); |
| 2086 | dyn.d_un.d_ptr = s->vma; |
| 2087 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2088 | break; |
| 2089 | |
| 2090 | case DT_PLTRELSZ: |
| 2091 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); |
| 2092 | BFD_ASSERT (s != NULL); |
| 2093 | if (s->_cooked_size != 0) |
| 2094 | dyn.d_un.d_val = s->_cooked_size; |
| 2095 | else |
| 2096 | dyn.d_un.d_val = s->_raw_size; |
| 2097 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2098 | break; |
| 2099 | |
| 2100 | case DT_RELASZ: |
| 2101 | /* The procedure linkage table relocs (DT_JMPREL) should |
| 2102 | not be included in the overall relocs (DT_RELA). |
| 2103 | Therefore, we override the DT_RELASZ entry here to |
| 2104 | make it not include the JMPREL relocs. Since the |
| 2105 | linker script arranges for .rela.plt to follow all |
| 2106 | other relocation sections, we don't have to worry |
| 2107 | about changing the DT_RELA entry. */ |
| 2108 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); |
| 2109 | if (s != NULL) |
| 2110 | { |
| 2111 | if (s->_cooked_size != 0) |
| 2112 | dyn.d_un.d_val -= s->_cooked_size; |
| 2113 | else |
| 2114 | dyn.d_un.d_val -= s->_raw_size; |
| 2115 | } |
| 2116 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2117 | break; |
| 2118 | } |
| 2119 | } |
| 2120 | |
| 2121 | /* Fill in the first entry in the procedure linkage table. */ |
| 2122 | if (splt->_raw_size > 0) |
| 2123 | { |
| 2124 | memcpy (splt->contents, elf_vax_plt0_entry, PLT_ENTRY_SIZE); |
| 2125 | bfd_put_32 (output_bfd, |
| 2126 | (sgot->output_section->vma |
| 2127 | + sgot->output_offset + 4 |
| 2128 | - (splt->output_section->vma + 6)), |
| 2129 | splt->contents + 2); |
| 2130 | bfd_put_32 (output_bfd, |
| 2131 | (sgot->output_section->vma |
| 2132 | + sgot->output_offset + 8 |
| 2133 | - (splt->output_section->vma + 12)), |
| 2134 | splt->contents + 8); |
| 2135 | elf_section_data (splt->output_section)->this_hdr.sh_entsize |
| 2136 | = PLT_ENTRY_SIZE; |
| 2137 | } |
| 2138 | } |
| 2139 | |
| 2140 | /* Fill in the first three entries in the global offset table. */ |
| 2141 | if (sgot->_raw_size > 0) |
| 2142 | { |
| 2143 | if (sdyn == NULL) |
| 2144 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
| 2145 | else |
| 2146 | bfd_put_32 (output_bfd, |
| 2147 | sdyn->output_section->vma + sdyn->output_offset, |
| 2148 | sgot->contents); |
| 2149 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); |
| 2150 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); |
| 2151 | } |
| 2152 | |
| 2153 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| 2154 | |
| 2155 | return TRUE; |
| 2156 | } |
| 2157 | |
| 2158 | #define TARGET_LITTLE_SYM bfd_elf32_vax_vec |
| 2159 | #define TARGET_LITTLE_NAME "elf32-vax" |
| 2160 | #define ELF_MACHINE_CODE EM_VAX |
| 2161 | #define ELF_MAXPAGESIZE 0x1000 |
| 2162 | |
| 2163 | #define elf_backend_create_dynamic_sections \ |
| 2164 | _bfd_elf_create_dynamic_sections |
| 2165 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 2166 | elf_vax_link_hash_table_create |
| 2167 | #define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link |
| 2168 | |
| 2169 | #define elf_backend_check_relocs elf_vax_check_relocs |
| 2170 | #define elf_backend_adjust_dynamic_symbol \ |
| 2171 | elf_vax_adjust_dynamic_symbol |
| 2172 | #define elf_backend_size_dynamic_sections \ |
| 2173 | elf_vax_size_dynamic_sections |
| 2174 | #define elf_backend_relocate_section elf_vax_relocate_section |
| 2175 | #define elf_backend_finish_dynamic_symbol \ |
| 2176 | elf_vax_finish_dynamic_symbol |
| 2177 | #define elf_backend_finish_dynamic_sections \ |
| 2178 | elf_vax_finish_dynamic_sections |
| 2179 | #define elf_backend_gc_mark_hook elf_vax_gc_mark_hook |
| 2180 | #define elf_backend_gc_sweep_hook elf_vax_gc_sweep_hook |
| 2181 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
| 2182 | elf32_vax_merge_private_bfd_data |
| 2183 | #define bfd_elf32_bfd_set_private_flags \ |
| 2184 | elf32_vax_set_private_flags |
| 2185 | #define bfd_elf32_bfd_print_private_bfd_data \ |
| 2186 | elf32_vax_print_private_bfd_data |
| 2187 | |
| 2188 | #define elf_backend_can_gc_sections 1 |
| 2189 | #define elf_backend_want_got_plt 1 |
| 2190 | #define elf_backend_plt_readonly 1 |
| 2191 | #define elf_backend_want_plt_sym 0 |
| 2192 | #define elf_backend_got_header_size 16 |
| 2193 | #define elf_backend_rela_normal 1 |
| 2194 | |
| 2195 | #include "elf32-target.h" |