| 1 | /* Lattice Mico32-specific support for 32-bit ELF |
| 2 | Copyright 2008, 2009, 2010 Free Software Foundation, Inc. |
| 3 | Contributed by Jon Beniston <jon@beniston.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 "bfd.h" |
| 23 | #include "sysdep.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "elf-bfd.h" |
| 26 | #include "elf/lm32.h" |
| 27 | |
| 28 | #define DEFAULT_STACK_SIZE 0x20000 |
| 29 | |
| 30 | #define PLT_ENTRY_SIZE 20 |
| 31 | |
| 32 | #define PLT0_ENTRY_WORD0 0 |
| 33 | #define PLT0_ENTRY_WORD1 0 |
| 34 | #define PLT0_ENTRY_WORD2 0 |
| 35 | #define PLT0_ENTRY_WORD3 0 |
| 36 | #define PLT0_ENTRY_WORD4 0 |
| 37 | |
| 38 | #define PLT0_PIC_ENTRY_WORD0 0 |
| 39 | #define PLT0_PIC_ENTRY_WORD1 0 |
| 40 | #define PLT0_PIC_ENTRY_WORD2 0 |
| 41 | #define PLT0_PIC_ENTRY_WORD3 0 |
| 42 | #define PLT0_PIC_ENTRY_WORD4 0 |
| 43 | |
| 44 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" |
| 45 | |
| 46 | extern const bfd_target bfd_elf32_lm32fdpic_vec; |
| 47 | |
| 48 | #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_lm32fdpic_vec) |
| 49 | |
| 50 | static bfd_reloc_status_type lm32_elf_gprel_reloc |
| 51 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 52 | |
| 53 | /* The linker needs to keep track of the number of relocs that it |
| 54 | decides to copy as dynamic relocs in check_relocs for each symbol. |
| 55 | This is so that it can later discard them if they are found to be |
| 56 | unnecessary. We store the information in a field extending the |
| 57 | regular ELF linker hash table. */ |
| 58 | |
| 59 | struct elf_lm32_dyn_relocs |
| 60 | { |
| 61 | struct elf_lm32_dyn_relocs *next; |
| 62 | |
| 63 | /* The input section of the reloc. */ |
| 64 | asection *sec; |
| 65 | |
| 66 | /* Total number of relocs copied for the input section. */ |
| 67 | bfd_size_type count; |
| 68 | |
| 69 | /* Number of pc-relative relocs copied for the input section. */ |
| 70 | bfd_size_type pc_count; |
| 71 | }; |
| 72 | |
| 73 | /* lm32 ELF linker hash entry. */ |
| 74 | |
| 75 | struct elf_lm32_link_hash_entry |
| 76 | { |
| 77 | struct elf_link_hash_entry root; |
| 78 | |
| 79 | /* Track dynamic relocs copied for this symbol. */ |
| 80 | struct elf_lm32_dyn_relocs *dyn_relocs; |
| 81 | }; |
| 82 | |
| 83 | /* lm32 ELF linker hash table. */ |
| 84 | |
| 85 | struct elf_lm32_link_hash_table |
| 86 | { |
| 87 | struct elf_link_hash_table root; |
| 88 | |
| 89 | /* Short-cuts to get to dynamic linker sections. */ |
| 90 | asection *sgot; |
| 91 | asection *sgotplt; |
| 92 | asection *srelgot; |
| 93 | asection *sfixup32; |
| 94 | asection *splt; |
| 95 | asection *srelplt; |
| 96 | asection *sdynbss; |
| 97 | asection *srelbss; |
| 98 | |
| 99 | int relocs32; |
| 100 | }; |
| 101 | |
| 102 | /* Get the lm32 ELF linker hash table from a link_info structure. */ |
| 103 | |
| 104 | #define lm32_elf_hash_table(p) \ |
| 105 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
| 106 | == LM32_ELF_DATA ? ((struct elf_lm32_link_hash_table *) ((p)->hash)) : NULL) |
| 107 | |
| 108 | #define lm32fdpic_got_section(info) \ |
| 109 | (lm32_elf_hash_table (info)->sgot) |
| 110 | #define lm32fdpic_gotrel_section(info) \ |
| 111 | (lm32_elf_hash_table (info)->srelgot) |
| 112 | #define lm32fdpic_fixup32_section(info) \ |
| 113 | (lm32_elf_hash_table (info)->sfixup32) |
| 114 | |
| 115 | struct weak_symbol_list |
| 116 | { |
| 117 | const char *name; |
| 118 | struct weak_symbol_list *next; |
| 119 | }; |
| 120 | |
| 121 | /* Create an entry in an lm32 ELF linker hash table. */ |
| 122 | |
| 123 | static struct bfd_hash_entry * |
| 124 | lm32_elf_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 125 | struct bfd_hash_table *table, |
| 126 | const char *string) |
| 127 | { |
| 128 | struct elf_lm32_link_hash_entry *ret = |
| 129 | (struct elf_lm32_link_hash_entry *) entry; |
| 130 | |
| 131 | /* Allocate the structure if it has not already been allocated by a |
| 132 | subclass. */ |
| 133 | if (ret == NULL) |
| 134 | ret = bfd_hash_allocate (table, |
| 135 | sizeof (struct elf_lm32_link_hash_entry)); |
| 136 | if (ret == NULL) |
| 137 | return NULL; |
| 138 | |
| 139 | /* Call the allocation method of the superclass. */ |
| 140 | ret = ((struct elf_lm32_link_hash_entry *) |
| 141 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 142 | table, string)); |
| 143 | if (ret != NULL) |
| 144 | { |
| 145 | struct elf_lm32_link_hash_entry *eh; |
| 146 | |
| 147 | eh = (struct elf_lm32_link_hash_entry *) ret; |
| 148 | eh->dyn_relocs = NULL; |
| 149 | } |
| 150 | |
| 151 | return (struct bfd_hash_entry *) ret; |
| 152 | } |
| 153 | |
| 154 | /* Create an lm32 ELF linker hash table. */ |
| 155 | |
| 156 | static struct bfd_link_hash_table * |
| 157 | lm32_elf_link_hash_table_create (bfd *abfd) |
| 158 | { |
| 159 | struct elf_lm32_link_hash_table *ret; |
| 160 | bfd_size_type amt = sizeof (struct elf_lm32_link_hash_table); |
| 161 | |
| 162 | ret = bfd_malloc (amt); |
| 163 | if (ret == NULL) |
| 164 | return NULL; |
| 165 | |
| 166 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 167 | lm32_elf_link_hash_newfunc, |
| 168 | sizeof (struct elf_lm32_link_hash_entry), |
| 169 | LM32_ELF_DATA)) |
| 170 | { |
| 171 | free (ret); |
| 172 | return NULL; |
| 173 | } |
| 174 | |
| 175 | ret->sgot = NULL; |
| 176 | ret->sgotplt = NULL; |
| 177 | ret->srelgot = NULL; |
| 178 | ret->sfixup32 = NULL; |
| 179 | ret->splt = NULL; |
| 180 | ret->srelplt = NULL; |
| 181 | ret->sdynbss = NULL; |
| 182 | ret->srelbss = NULL; |
| 183 | ret->relocs32 = 0; |
| 184 | |
| 185 | return &ret->root.root; |
| 186 | } |
| 187 | |
| 188 | /* Add a fixup to the ROFIXUP section. */ |
| 189 | |
| 190 | static bfd_vma |
| 191 | _lm32fdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma relocation) |
| 192 | { |
| 193 | bfd_vma fixup_offset; |
| 194 | |
| 195 | if (rofixup->flags & SEC_EXCLUDE) |
| 196 | return -1; |
| 197 | |
| 198 | fixup_offset = rofixup->reloc_count * 4; |
| 199 | if (rofixup->contents) |
| 200 | { |
| 201 | BFD_ASSERT (fixup_offset < rofixup->size); |
| 202 | if (fixup_offset < rofixup->size) |
| 203 | bfd_put_32 (output_bfd, relocation, rofixup->contents + fixup_offset); |
| 204 | } |
| 205 | rofixup->reloc_count++; |
| 206 | |
| 207 | return fixup_offset; |
| 208 | } |
| 209 | |
| 210 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up |
| 211 | shortcuts to them in our hash table. */ |
| 212 | |
| 213 | static bfd_boolean |
| 214 | create_got_section (bfd *dynobj, struct bfd_link_info *info) |
| 215 | { |
| 216 | struct elf_lm32_link_hash_table *htab; |
| 217 | asection *s; |
| 218 | |
| 219 | /* This function may be called more than once. */ |
| 220 | s = bfd_get_section_by_name (dynobj, ".got"); |
| 221 | if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0) |
| 222 | return TRUE; |
| 223 | |
| 224 | htab = lm32_elf_hash_table (info); |
| 225 | if (htab == NULL) |
| 226 | return FALSE; |
| 227 | |
| 228 | if (! _bfd_elf_create_got_section (dynobj, info)) |
| 229 | return FALSE; |
| 230 | |
| 231 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 232 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 233 | htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 234 | if (! htab->sgot || ! htab->sgotplt || ! htab->srelgot) |
| 235 | abort (); |
| 236 | |
| 237 | return TRUE; |
| 238 | } |
| 239 | |
| 240 | /* Create .rofixup sections in DYNOBJ, and set up |
| 241 | shortcuts to them in our hash table. */ |
| 242 | |
| 243 | static bfd_boolean |
| 244 | create_rofixup_section (bfd *dynobj, struct bfd_link_info *info) |
| 245 | { |
| 246 | struct elf_lm32_link_hash_table *htab; |
| 247 | htab = lm32_elf_hash_table (info); |
| 248 | |
| 249 | if (htab == NULL) |
| 250 | return FALSE; |
| 251 | |
| 252 | /* Fixup section for R_LM32_32 relocs. */ |
| 253 | lm32fdpic_fixup32_section (info) = bfd_make_section_with_flags (dynobj, |
| 254 | ".rofixup", |
| 255 | (SEC_ALLOC |
| 256 | | SEC_LOAD |
| 257 | | SEC_HAS_CONTENTS |
| 258 | | SEC_IN_MEMORY |
| 259 | | SEC_LINKER_CREATED |
| 260 | | SEC_READONLY)); |
| 261 | if (lm32fdpic_fixup32_section (info) == NULL |
| 262 | || ! bfd_set_section_alignment (dynobj, lm32fdpic_fixup32_section (info), 2)) |
| 263 | return FALSE; |
| 264 | |
| 265 | return TRUE; |
| 266 | } |
| 267 | |
| 268 | static reloc_howto_type lm32_elf_howto_table [] = |
| 269 | { |
| 270 | /* This reloc does nothing. */ |
| 271 | HOWTO (R_LM32_NONE, /* type */ |
| 272 | 0, /* rightshift */ |
| 273 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 274 | 32, /* bitsize */ |
| 275 | FALSE, /* pc_relative */ |
| 276 | 0, /* bitpos */ |
| 277 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 278 | bfd_elf_generic_reloc, /* special_function */ |
| 279 | "R_LM32_NONE", /* name */ |
| 280 | FALSE, /* partial_inplace */ |
| 281 | 0, /* src_mask */ |
| 282 | 0, /* dst_mask */ |
| 283 | FALSE), /* pcrel_offset */ |
| 284 | |
| 285 | /* An 8 bit absolute relocation. */ |
| 286 | HOWTO (R_LM32_8, /* type */ |
| 287 | 0, /* rightshift */ |
| 288 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 289 | 8, /* bitsize */ |
| 290 | FALSE, /* pc_relative */ |
| 291 | 0, /* bitpos */ |
| 292 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 293 | bfd_elf_generic_reloc, /* special_function */ |
| 294 | "R_LM32_8", /* name */ |
| 295 | FALSE, /* partial_inplace */ |
| 296 | 0, /* src_mask */ |
| 297 | 0xff, /* dst_mask */ |
| 298 | FALSE), /* pcrel_offset */ |
| 299 | |
| 300 | /* A 16 bit absolute relocation. */ |
| 301 | HOWTO (R_LM32_16, /* type */ |
| 302 | 0, /* rightshift */ |
| 303 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 304 | 16, /* bitsize */ |
| 305 | FALSE, /* pc_relative */ |
| 306 | 0, /* bitpos */ |
| 307 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 308 | bfd_elf_generic_reloc, /* special_function */ |
| 309 | "R_LM32_16", /* name */ |
| 310 | FALSE, /* partial_inplace */ |
| 311 | 0, /* src_mask */ |
| 312 | 0xffff, /* dst_mask */ |
| 313 | FALSE), /* pcrel_offset */ |
| 314 | |
| 315 | /* A 32 bit absolute relocation. */ |
| 316 | HOWTO (R_LM32_32, /* type */ |
| 317 | 0, /* rightshift */ |
| 318 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 319 | 32, /* bitsize */ |
| 320 | FALSE, /* pc_relative */ |
| 321 | 0, /* bitpos */ |
| 322 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 323 | bfd_elf_generic_reloc, /* special_function */ |
| 324 | "R_LM32_32", /* name */ |
| 325 | FALSE, /* partial_inplace */ |
| 326 | 0, /* src_mask */ |
| 327 | 0xffffffff, /* dst_mask */ |
| 328 | FALSE), /* pcrel_offset */ |
| 329 | |
| 330 | HOWTO (R_LM32_HI16, /* type */ |
| 331 | 16, /* rightshift */ |
| 332 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 333 | 16, /* bitsize */ |
| 334 | FALSE, /* pc_relative */ |
| 335 | 0, /* bitpos */ |
| 336 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 337 | bfd_elf_generic_reloc, /* special_function */ |
| 338 | "R_LM32_HI16", /* name */ |
| 339 | FALSE, /* partial_inplace */ |
| 340 | 0, /* src_mask */ |
| 341 | 0xffff, /* dst_mask */ |
| 342 | FALSE), /* pcrel_offset */ |
| 343 | |
| 344 | HOWTO (R_LM32_LO16, /* type */ |
| 345 | 0, /* rightshift */ |
| 346 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 347 | 16, /* bitsize */ |
| 348 | FALSE, /* pc_relative */ |
| 349 | 0, /* bitpos */ |
| 350 | complain_overflow_dont, /* complain_on_overflow */ |
| 351 | bfd_elf_generic_reloc, /* special_function */ |
| 352 | "R_LM32_LO16", /* name */ |
| 353 | FALSE, /* partial_inplace */ |
| 354 | 0, /* src_mask */ |
| 355 | 0xffff, /* dst_mask */ |
| 356 | FALSE), /* pcrel_offset */ |
| 357 | |
| 358 | HOWTO (R_LM32_GPREL16, /* type */ |
| 359 | 0, /* rightshift */ |
| 360 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 361 | 16, /* bitsize */ |
| 362 | FALSE, /* pc_relative */ |
| 363 | 0, /* bitpos */ |
| 364 | complain_overflow_dont, /* complain_on_overflow */ |
| 365 | lm32_elf_gprel_reloc, /* special_function */ |
| 366 | "R_LM32_GPREL16", /* name */ |
| 367 | FALSE, /* partial_inplace */ |
| 368 | 0, /* src_mask */ |
| 369 | 0xffff, /* dst_mask */ |
| 370 | FALSE), /* pcrel_offset */ |
| 371 | |
| 372 | HOWTO (R_LM32_CALL, /* type */ |
| 373 | 2, /* rightshift */ |
| 374 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 375 | 26, /* bitsize */ |
| 376 | TRUE, /* pc_relative */ |
| 377 | 0, /* bitpos */ |
| 378 | complain_overflow_signed, /* complain_on_overflow */ |
| 379 | bfd_elf_generic_reloc, /* special_function */ |
| 380 | "R_LM32_CALL", /* name */ |
| 381 | FALSE, /* partial_inplace */ |
| 382 | 0, /* src_mask */ |
| 383 | 0x3ffffff, /* dst_mask */ |
| 384 | TRUE), /* pcrel_offset */ |
| 385 | |
| 386 | HOWTO (R_LM32_BRANCH, /* type */ |
| 387 | 2, /* rightshift */ |
| 388 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 389 | 16, /* bitsize */ |
| 390 | TRUE, /* pc_relative */ |
| 391 | 0, /* bitpos */ |
| 392 | complain_overflow_signed, /* complain_on_overflow */ |
| 393 | bfd_elf_generic_reloc, /* special_function */ |
| 394 | "R_LM32_BRANCH", /* name */ |
| 395 | FALSE, /* partial_inplace */ |
| 396 | 0, /* src_mask */ |
| 397 | 0xffff, /* dst_mask */ |
| 398 | TRUE), /* pcrel_offset */ |
| 399 | |
| 400 | /* GNU extension to record C++ vtable hierarchy. */ |
| 401 | HOWTO (R_LM32_GNU_VTINHERIT, /* type */ |
| 402 | 0, /* rightshift */ |
| 403 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 404 | 0, /* bitsize */ |
| 405 | FALSE, /* pc_relative */ |
| 406 | 0, /* bitpos */ |
| 407 | complain_overflow_dont, /* complain_on_overflow */ |
| 408 | NULL, /* special_function */ |
| 409 | "R_LM32_GNU_VTINHERIT", /* name */ |
| 410 | FALSE, /* partial_inplace */ |
| 411 | 0, /* src_mask */ |
| 412 | 0, /* dst_mask */ |
| 413 | FALSE), /* pcrel_offset */ |
| 414 | |
| 415 | /* GNU extension to record C++ vtable member usage. */ |
| 416 | HOWTO (R_LM32_GNU_VTENTRY, /* type */ |
| 417 | 0, /* rightshift */ |
| 418 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 419 | 0, /* bitsize */ |
| 420 | FALSE, /* pc_relative */ |
| 421 | 0, /* bitpos */ |
| 422 | complain_overflow_dont, /* complain_on_overflow */ |
| 423 | _bfd_elf_rel_vtable_reloc_fn,/* special_function */ |
| 424 | "R_LM32_GNU_VTENTRY", /* name */ |
| 425 | FALSE, /* partial_inplace */ |
| 426 | 0, /* src_mask */ |
| 427 | 0, /* dst_mask */ |
| 428 | FALSE), /* pcrel_offset */ |
| 429 | |
| 430 | HOWTO (R_LM32_16_GOT, /* type */ |
| 431 | 0, /* rightshift */ |
| 432 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 433 | 16, /* bitsize */ |
| 434 | FALSE, /* pc_relative */ |
| 435 | 0, /* bitpos */ |
| 436 | complain_overflow_signed, /* complain_on_overflow */ |
| 437 | bfd_elf_generic_reloc, /* special_function */ |
| 438 | "R_LM32_16_GOT", /* name */ |
| 439 | FALSE, /* partial_inplace */ |
| 440 | 0, /* src_mask */ |
| 441 | 0xffff, /* dst_mask */ |
| 442 | FALSE), /* pcrel_offset */ |
| 443 | |
| 444 | HOWTO (R_LM32_GOTOFF_HI16, /* type */ |
| 445 | 16, /* rightshift */ |
| 446 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 447 | 16, /* bitsize */ |
| 448 | FALSE, /* pc_relative */ |
| 449 | 0, /* bitpos */ |
| 450 | complain_overflow_dont, /* complain_on_overflow */ |
| 451 | bfd_elf_generic_reloc, /* special_function */ |
| 452 | "R_LM32_GOTOFF_HI16", /* name */ |
| 453 | FALSE, /* partial_inplace */ |
| 454 | 0xffff, /* src_mask */ |
| 455 | 0xffff, /* dst_mask */ |
| 456 | FALSE), /* pcrel_offset */ |
| 457 | |
| 458 | HOWTO (R_LM32_GOTOFF_LO16, /* type */ |
| 459 | 0, /* rightshift */ |
| 460 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 461 | 16, /* bitsize */ |
| 462 | FALSE, /* pc_relative */ |
| 463 | 0, /* bitpos */ |
| 464 | complain_overflow_dont, /* complain_on_overflow */ |
| 465 | bfd_elf_generic_reloc, /* special_function */ |
| 466 | "R_LM32_GOTOFF_LO16", /* name */ |
| 467 | FALSE, /* partial_inplace */ |
| 468 | 0xffff, /* src_mask */ |
| 469 | 0xffff, /* dst_mask */ |
| 470 | FALSE), /* pcrel_offset */ |
| 471 | |
| 472 | HOWTO (R_LM32_COPY, /* type */ |
| 473 | 0, /* rightshift */ |
| 474 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 475 | 32, /* bitsize */ |
| 476 | FALSE, /* pc_relative */ |
| 477 | 0, /* bitpos */ |
| 478 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 479 | bfd_elf_generic_reloc, /* special_function */ |
| 480 | "R_LM32_COPY", /* name */ |
| 481 | FALSE, /* partial_inplace */ |
| 482 | 0xffffffff, /* src_mask */ |
| 483 | 0xffffffff, /* dst_mask */ |
| 484 | FALSE), /* pcrel_offset */ |
| 485 | |
| 486 | HOWTO (R_LM32_GLOB_DAT, /* type */ |
| 487 | 0, /* rightshift */ |
| 488 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 489 | 32, /* bitsize */ |
| 490 | FALSE, /* pc_relative */ |
| 491 | 0, /* bitpos */ |
| 492 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 493 | bfd_elf_generic_reloc, /* special_function */ |
| 494 | "R_LM32_GLOB_DAT", /* name */ |
| 495 | FALSE, /* partial_inplace */ |
| 496 | 0xffffffff, /* src_mask */ |
| 497 | 0xffffffff, /* dst_mask */ |
| 498 | FALSE), /* pcrel_offset */ |
| 499 | |
| 500 | HOWTO (R_LM32_JMP_SLOT, /* type */ |
| 501 | 0, /* rightshift */ |
| 502 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 503 | 32, /* bitsize */ |
| 504 | FALSE, /* pc_relative */ |
| 505 | 0, /* bitpos */ |
| 506 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 507 | bfd_elf_generic_reloc, /* special_function */ |
| 508 | "R_LM32_JMP_SLOT", /* name */ |
| 509 | FALSE, /* partial_inplace */ |
| 510 | 0xffffffff, /* src_mask */ |
| 511 | 0xffffffff, /* dst_mask */ |
| 512 | FALSE), /* pcrel_offset */ |
| 513 | |
| 514 | HOWTO (R_LM32_RELATIVE, /* type */ |
| 515 | 0, /* rightshift */ |
| 516 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 517 | 32, /* bitsize */ |
| 518 | FALSE, /* pc_relative */ |
| 519 | 0, /* bitpos */ |
| 520 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 521 | bfd_elf_generic_reloc, /* special_function */ |
| 522 | "R_LM32_RELATIVE", /* name */ |
| 523 | FALSE, /* partial_inplace */ |
| 524 | 0xffffffff, /* src_mask */ |
| 525 | 0xffffffff, /* dst_mask */ |
| 526 | FALSE), /* pcrel_offset */ |
| 527 | |
| 528 | }; |
| 529 | |
| 530 | /* Map BFD reloc types to lm32 ELF reloc types. */ |
| 531 | |
| 532 | struct lm32_reloc_map |
| 533 | { |
| 534 | bfd_reloc_code_real_type bfd_reloc_val; |
| 535 | unsigned char elf_reloc_val; |
| 536 | }; |
| 537 | |
| 538 | static const struct lm32_reloc_map lm32_reloc_map[] = |
| 539 | { |
| 540 | { BFD_RELOC_NONE, R_LM32_NONE }, |
| 541 | { BFD_RELOC_8, R_LM32_8 }, |
| 542 | { BFD_RELOC_16, R_LM32_16 }, |
| 543 | { BFD_RELOC_32, R_LM32_32 }, |
| 544 | { BFD_RELOC_HI16, R_LM32_HI16 }, |
| 545 | { BFD_RELOC_LO16, R_LM32_LO16 }, |
| 546 | { BFD_RELOC_GPREL16, R_LM32_GPREL16 }, |
| 547 | { BFD_RELOC_LM32_CALL, R_LM32_CALL }, |
| 548 | { BFD_RELOC_LM32_BRANCH, R_LM32_BRANCH }, |
| 549 | { BFD_RELOC_VTABLE_INHERIT, R_LM32_GNU_VTINHERIT }, |
| 550 | { BFD_RELOC_VTABLE_ENTRY, R_LM32_GNU_VTENTRY }, |
| 551 | { BFD_RELOC_LM32_16_GOT, R_LM32_16_GOT }, |
| 552 | { BFD_RELOC_LM32_GOTOFF_HI16, R_LM32_GOTOFF_HI16 }, |
| 553 | { BFD_RELOC_LM32_GOTOFF_LO16, R_LM32_GOTOFF_LO16 }, |
| 554 | { BFD_RELOC_LM32_COPY, R_LM32_COPY }, |
| 555 | { BFD_RELOC_LM32_GLOB_DAT, R_LM32_GLOB_DAT }, |
| 556 | { BFD_RELOC_LM32_JMP_SLOT, R_LM32_JMP_SLOT }, |
| 557 | { BFD_RELOC_LM32_RELATIVE, R_LM32_RELATIVE }, |
| 558 | }; |
| 559 | |
| 560 | static reloc_howto_type * |
| 561 | lm32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 562 | bfd_reloc_code_real_type code) |
| 563 | { |
| 564 | unsigned int i; |
| 565 | |
| 566 | for (i = 0; i < sizeof (lm32_reloc_map) / sizeof (lm32_reloc_map[0]); i++) |
| 567 | if (lm32_reloc_map[i].bfd_reloc_val == code) |
| 568 | return &lm32_elf_howto_table[lm32_reloc_map[i].elf_reloc_val]; |
| 569 | return NULL; |
| 570 | } |
| 571 | |
| 572 | static reloc_howto_type * |
| 573 | lm32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 574 | const char *r_name) |
| 575 | { |
| 576 | unsigned int i; |
| 577 | |
| 578 | for (i = 0; |
| 579 | i < sizeof (lm32_elf_howto_table) / sizeof (lm32_elf_howto_table[0]); |
| 580 | i++) |
| 581 | if (lm32_elf_howto_table[i].name != NULL |
| 582 | && strcasecmp (lm32_elf_howto_table[i].name, r_name) == 0) |
| 583 | return &lm32_elf_howto_table[i]; |
| 584 | |
| 585 | return NULL; |
| 586 | } |
| 587 | |
| 588 | |
| 589 | /* Set the howto pointer for an Lattice Mico32 ELF reloc. */ |
| 590 | |
| 591 | static void |
| 592 | lm32_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, |
| 593 | arelent *cache_ptr, |
| 594 | Elf_Internal_Rela *dst) |
| 595 | { |
| 596 | unsigned int r_type; |
| 597 | |
| 598 | r_type = ELF32_R_TYPE (dst->r_info); |
| 599 | BFD_ASSERT (r_type < (unsigned int) R_LM32_max); |
| 600 | cache_ptr->howto = &lm32_elf_howto_table[r_type]; |
| 601 | } |
| 602 | |
| 603 | /* Set the right machine number for an Lattice Mico32 ELF file. */ |
| 604 | |
| 605 | static bfd_boolean |
| 606 | lm32_elf_object_p (bfd *abfd) |
| 607 | { |
| 608 | return bfd_default_set_arch_mach (abfd, bfd_arch_lm32, bfd_mach_lm32); |
| 609 | } |
| 610 | |
| 611 | /* Set machine type flags just before file is written out. */ |
| 612 | |
| 613 | static void |
| 614 | lm32_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) |
| 615 | { |
| 616 | elf_elfheader (abfd)->e_machine = EM_LATTICEMICO32; |
| 617 | elf_elfheader (abfd)->e_flags &=~ EF_LM32_MACH; |
| 618 | switch (bfd_get_mach (abfd)) |
| 619 | { |
| 620 | case bfd_mach_lm32: |
| 621 | elf_elfheader (abfd)->e_flags |= E_LM32_MACH; |
| 622 | break; |
| 623 | default: |
| 624 | abort (); |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a |
| 629 | dangerous relocation. */ |
| 630 | |
| 631 | static bfd_boolean |
| 632 | lm32_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp) |
| 633 | { |
| 634 | unsigned int count; |
| 635 | asymbol **sym; |
| 636 | unsigned int i; |
| 637 | |
| 638 | /* If we've already figured out what GP will be, just return it. */ |
| 639 | *pgp = _bfd_get_gp_value (output_bfd); |
| 640 | if (*pgp) |
| 641 | return TRUE; |
| 642 | |
| 643 | count = bfd_get_symcount (output_bfd); |
| 644 | sym = bfd_get_outsymbols (output_bfd); |
| 645 | |
| 646 | /* The linker script will have created a symbol named `_gp' with the |
| 647 | appropriate value. */ |
| 648 | if (sym == NULL) |
| 649 | i = count; |
| 650 | else |
| 651 | { |
| 652 | for (i = 0; i < count; i++, sym++) |
| 653 | { |
| 654 | const char *name; |
| 655 | |
| 656 | name = bfd_asymbol_name (*sym); |
| 657 | if (*name == '_' && strcmp (name, "_gp") == 0) |
| 658 | { |
| 659 | *pgp = bfd_asymbol_value (*sym); |
| 660 | _bfd_set_gp_value (output_bfd, *pgp); |
| 661 | break; |
| 662 | } |
| 663 | } |
| 664 | } |
| 665 | |
| 666 | if (i >= count) |
| 667 | { |
| 668 | /* Only get the error once. */ |
| 669 | *pgp = 4; |
| 670 | _bfd_set_gp_value (output_bfd, *pgp); |
| 671 | return FALSE; |
| 672 | } |
| 673 | |
| 674 | return TRUE; |
| 675 | } |
| 676 | |
| 677 | /* We have to figure out the gp value, so that we can adjust the |
| 678 | symbol value correctly. We look up the symbol _gp in the output |
| 679 | BFD. If we can't find it, we're stuck. We cache it in the ELF |
| 680 | target data. We don't need to adjust the symbol value for an |
| 681 | external symbol if we are producing relocatable output. */ |
| 682 | |
| 683 | static bfd_reloc_status_type |
| 684 | lm32_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable, |
| 685 | char **error_message, bfd_vma *pgp) |
| 686 | { |
| 687 | if (bfd_is_und_section (symbol->section) && !relocatable) |
| 688 | { |
| 689 | *pgp = 0; |
| 690 | return bfd_reloc_undefined; |
| 691 | } |
| 692 | |
| 693 | *pgp = _bfd_get_gp_value (output_bfd); |
| 694 | if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0)) |
| 695 | { |
| 696 | if (relocatable) |
| 697 | { |
| 698 | /* Make up a value. */ |
| 699 | *pgp = symbol->section->output_section->vma + 0x4000; |
| 700 | _bfd_set_gp_value (output_bfd, *pgp); |
| 701 | } |
| 702 | else if (!lm32_elf_assign_gp (output_bfd, pgp)) |
| 703 | { |
| 704 | *error_message = |
| 705 | (char *) |
| 706 | _("global pointer relative relocation when _gp not defined"); |
| 707 | return bfd_reloc_dangerous; |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | return bfd_reloc_ok; |
| 712 | } |
| 713 | |
| 714 | static bfd_reloc_status_type |
| 715 | lm32_elf_do_gprel_relocate (bfd *abfd, |
| 716 | reloc_howto_type *howto, |
| 717 | asection *input_section ATTRIBUTE_UNUSED, |
| 718 | bfd_byte *data, |
| 719 | bfd_vma offset, |
| 720 | bfd_vma symbol_value, |
| 721 | bfd_vma addend) |
| 722 | { |
| 723 | return _bfd_final_link_relocate (howto, abfd, input_section, |
| 724 | data, offset, symbol_value, addend); |
| 725 | } |
| 726 | |
| 727 | static bfd_reloc_status_type |
| 728 | lm32_elf_gprel_reloc (bfd *abfd, |
| 729 | arelent *reloc_entry, |
| 730 | asymbol *symbol, |
| 731 | void *data, |
| 732 | asection *input_section, |
| 733 | bfd *output_bfd, |
| 734 | char **msg) |
| 735 | { |
| 736 | bfd_vma relocation; |
| 737 | bfd_vma gp; |
| 738 | bfd_reloc_status_type r; |
| 739 | |
| 740 | if (output_bfd != (bfd *) NULL |
| 741 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 742 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| 743 | { |
| 744 | reloc_entry->address += input_section->output_offset; |
| 745 | return bfd_reloc_ok; |
| 746 | } |
| 747 | |
| 748 | if (output_bfd != NULL) |
| 749 | return bfd_reloc_ok; |
| 750 | |
| 751 | relocation = symbol->value |
| 752 | + symbol->section->output_section->vma + symbol->section->output_offset; |
| 753 | |
| 754 | if ((r = |
| 755 | lm32_elf_final_gp (abfd, symbol, FALSE, msg, &gp)) == bfd_reloc_ok) |
| 756 | { |
| 757 | relocation = relocation + reloc_entry->addend - gp; |
| 758 | reloc_entry->addend = 0; |
| 759 | if ((signed) relocation < -32768 || (signed) relocation > 32767) |
| 760 | { |
| 761 | *msg = _("global pointer relative address out of range"); |
| 762 | r = bfd_reloc_outofrange; |
| 763 | } |
| 764 | else |
| 765 | { |
| 766 | r = lm32_elf_do_gprel_relocate (abfd, reloc_entry->howto, |
| 767 | input_section, |
| 768 | data, reloc_entry->address, |
| 769 | relocation, reloc_entry->addend); |
| 770 | } |
| 771 | } |
| 772 | |
| 773 | return r; |
| 774 | } |
| 775 | |
| 776 | /* Find the segment number in which OSEC, and output section, is |
| 777 | located. */ |
| 778 | |
| 779 | static unsigned |
| 780 | _lm32fdpic_osec_to_segment (bfd *output_bfd, asection *osec) |
| 781 | { |
| 782 | struct elf_segment_map *m; |
| 783 | Elf_Internal_Phdr *p; |
| 784 | |
| 785 | /* Find the segment that contains the output_section. */ |
| 786 | for (m = elf_tdata (output_bfd)->segment_map, |
| 787 | p = elf_tdata (output_bfd)->phdr; |
| 788 | m != NULL; |
| 789 | m = m->next, p++) |
| 790 | { |
| 791 | int i; |
| 792 | |
| 793 | for (i = m->count - 1; i >= 0; i--) |
| 794 | if (m->sections[i] == osec) |
| 795 | break; |
| 796 | |
| 797 | if (i >= 0) |
| 798 | break; |
| 799 | } |
| 800 | |
| 801 | return p - elf_tdata (output_bfd)->phdr; |
| 802 | } |
| 803 | |
| 804 | /* Determine if an output section is read-only. */ |
| 805 | |
| 806 | inline static bfd_boolean |
| 807 | _lm32fdpic_osec_readonly_p (bfd *output_bfd, asection *osec) |
| 808 | { |
| 809 | unsigned seg = _lm32fdpic_osec_to_segment (output_bfd, osec); |
| 810 | |
| 811 | return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W); |
| 812 | } |
| 813 | |
| 814 | /* Relocate a section */ |
| 815 | |
| 816 | static bfd_boolean |
| 817 | lm32_elf_relocate_section (bfd *output_bfd, |
| 818 | struct bfd_link_info *info, |
| 819 | bfd *input_bfd, |
| 820 | asection *input_section, |
| 821 | bfd_byte *contents, |
| 822 | Elf_Internal_Rela *relocs, |
| 823 | Elf_Internal_Sym *local_syms, |
| 824 | asection **local_sections) |
| 825 | { |
| 826 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 827 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); |
| 828 | Elf_Internal_Rela *rel, *relend; |
| 829 | struct elf_lm32_link_hash_table *htab = lm32_elf_hash_table (info); |
| 830 | bfd *dynobj; |
| 831 | bfd_vma *local_got_offsets; |
| 832 | asection *sgot; |
| 833 | |
| 834 | if (htab == NULL) |
| 835 | return FALSE; |
| 836 | |
| 837 | dynobj = htab->root.dynobj; |
| 838 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 839 | |
| 840 | sgot = htab->sgot; |
| 841 | |
| 842 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 843 | sym_hashes = elf_sym_hashes (input_bfd); |
| 844 | |
| 845 | rel = relocs; |
| 846 | relend = relocs + input_section->reloc_count; |
| 847 | for (; rel < relend; rel++) |
| 848 | { |
| 849 | reloc_howto_type *howto; |
| 850 | unsigned int r_type; |
| 851 | unsigned long r_symndx; |
| 852 | Elf_Internal_Sym *sym; |
| 853 | asection *sec; |
| 854 | struct elf_link_hash_entry *h; |
| 855 | bfd_vma relocation; |
| 856 | bfd_vma gp; |
| 857 | bfd_reloc_status_type r; |
| 858 | const char *name = NULL; |
| 859 | |
| 860 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 861 | r_type = ELF32_R_TYPE (rel->r_info); |
| 862 | |
| 863 | if (r_type == R_LM32_GNU_VTENTRY |
| 864 | || r_type == R_LM32_GNU_VTINHERIT ) |
| 865 | continue; |
| 866 | |
| 867 | h = NULL; |
| 868 | sym = NULL; |
| 869 | sec = NULL; |
| 870 | |
| 871 | howto = lm32_elf_howto_table + r_type; |
| 872 | |
| 873 | if (r_symndx < symtab_hdr->sh_info) |
| 874 | { |
| 875 | /* It's a local symbol. */ |
| 876 | sym = local_syms + r_symndx; |
| 877 | sec = local_sections[r_symndx]; |
| 878 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 879 | name = bfd_elf_string_from_elf_section |
| 880 | (input_bfd, symtab_hdr->sh_link, sym->st_name); |
| 881 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; |
| 882 | } |
| 883 | else |
| 884 | { |
| 885 | /* It's a global symbol. */ |
| 886 | bfd_boolean unresolved_reloc; |
| 887 | bfd_boolean warned; |
| 888 | |
| 889 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 890 | r_symndx, symtab_hdr, sym_hashes, |
| 891 | h, sec, relocation, |
| 892 | unresolved_reloc, warned); |
| 893 | name = h->root.root.string; |
| 894 | } |
| 895 | |
| 896 | if (sec != NULL && elf_discarded_section (sec)) |
| 897 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 898 | rel, relend, howto, contents); |
| 899 | |
| 900 | if (info->relocatable) |
| 901 | { |
| 902 | /* This is a relocatable link. We don't have to change |
| 903 | anything, unless the reloc is against a section symbol, |
| 904 | in which case we have to adjust according to where the |
| 905 | section symbol winds up in the output section. */ |
| 906 | if (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 907 | continue; |
| 908 | |
| 909 | /* If partial_inplace, we need to store any additional addend |
| 910 | back in the section. */ |
| 911 | if (! howto->partial_inplace) |
| 912 | continue; |
| 913 | |
| 914 | /* Shouldn't reach here. */ |
| 915 | abort (); |
| 916 | r = bfd_reloc_ok; |
| 917 | } |
| 918 | else |
| 919 | { |
| 920 | switch (howto->type) |
| 921 | { |
| 922 | case R_LM32_GPREL16: |
| 923 | if (!lm32_elf_assign_gp (output_bfd, &gp)) |
| 924 | r = bfd_reloc_dangerous; |
| 925 | else |
| 926 | { |
| 927 | relocation = relocation + rel->r_addend - gp; |
| 928 | rel->r_addend = 0; |
| 929 | if ((signed)relocation < -32768 || (signed)relocation > 32767) |
| 930 | r = bfd_reloc_outofrange; |
| 931 | else |
| 932 | { |
| 933 | r = _bfd_final_link_relocate (howto, input_bfd, |
| 934 | input_section, contents, |
| 935 | rel->r_offset, relocation, |
| 936 | rel->r_addend); |
| 937 | } |
| 938 | } |
| 939 | break; |
| 940 | case R_LM32_16_GOT: |
| 941 | /* Relocation is to the entry for this symbol in the global |
| 942 | offset table. */ |
| 943 | BFD_ASSERT (sgot != NULL); |
| 944 | if (h != NULL) |
| 945 | { |
| 946 | bfd_boolean dyn; |
| 947 | bfd_vma off; |
| 948 | |
| 949 | off = h->got.offset; |
| 950 | BFD_ASSERT (off != (bfd_vma) -1); |
| 951 | |
| 952 | dyn = htab->root.dynamic_sections_created; |
| 953 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 954 | || (info->shared |
| 955 | && (info->symbolic |
| 956 | || h->dynindx == -1 |
| 957 | || h->forced_local) |
| 958 | && h->def_regular)) |
| 959 | { |
| 960 | /* This is actually a static link, or it is a |
| 961 | -Bsymbolic link and the symbol is defined |
| 962 | locally, or the symbol was forced to be local |
| 963 | because of a version file. We must initialize |
| 964 | this entry in the global offset table. Since the |
| 965 | offset must always be a multiple of 4, we use the |
| 966 | least significant bit to record whether we have |
| 967 | initialized it already. |
| 968 | |
| 969 | When doing a dynamic link, we create a .rela.got |
| 970 | relocation entry to initialize the value. This |
| 971 | is done in the finish_dynamic_symbol routine. */ |
| 972 | if ((off & 1) != 0) |
| 973 | off &= ~1; |
| 974 | else |
| 975 | { |
| 976 | /* Write entry in GOT */ |
| 977 | bfd_put_32 (output_bfd, relocation, |
| 978 | sgot->contents + off); |
| 979 | /* Create entry in .rofixup pointing to GOT entry. */ |
| 980 | if (IS_FDPIC (output_bfd) && h->root.type != bfd_link_hash_undefweak) |
| 981 | { |
| 982 | _lm32fdpic_add_rofixup (output_bfd, |
| 983 | lm32fdpic_fixup32_section |
| 984 | (info), |
| 985 | sgot->output_section->vma |
| 986 | + sgot->output_offset |
| 987 | + off); |
| 988 | } |
| 989 | /* Mark GOT entry as having been written. */ |
| 990 | h->got.offset |= 1; |
| 991 | } |
| 992 | } |
| 993 | |
| 994 | relocation = sgot->output_offset + off; |
| 995 | } |
| 996 | else |
| 997 | { |
| 998 | bfd_vma off; |
| 999 | bfd_byte *loc; |
| 1000 | |
| 1001 | BFD_ASSERT (local_got_offsets != NULL |
| 1002 | && local_got_offsets[r_symndx] != (bfd_vma) -1); |
| 1003 | |
| 1004 | /* Get offset into GOT table. */ |
| 1005 | off = local_got_offsets[r_symndx]; |
| 1006 | |
| 1007 | /* The offset must always be a multiple of 4. We use |
| 1008 | the least significant bit to record whether we have |
| 1009 | already processed this entry. */ |
| 1010 | if ((off & 1) != 0) |
| 1011 | off &= ~1; |
| 1012 | else |
| 1013 | { |
| 1014 | /* Write entry in GOT. */ |
| 1015 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); |
| 1016 | /* Create entry in .rofixup pointing to GOT entry. */ |
| 1017 | if (IS_FDPIC (output_bfd)) |
| 1018 | { |
| 1019 | _lm32fdpic_add_rofixup (output_bfd, |
| 1020 | lm32fdpic_fixup32_section |
| 1021 | (info), |
| 1022 | sgot->output_section->vma |
| 1023 | + sgot->output_offset |
| 1024 | + off); |
| 1025 | } |
| 1026 | |
| 1027 | if (info->shared) |
| 1028 | { |
| 1029 | asection *srelgot; |
| 1030 | Elf_Internal_Rela outrel; |
| 1031 | |
| 1032 | /* We need to generate a R_LM32_RELATIVE reloc |
| 1033 | for the dynamic linker. */ |
| 1034 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 1035 | BFD_ASSERT (srelgot != NULL); |
| 1036 | |
| 1037 | outrel.r_offset = (sgot->output_section->vma |
| 1038 | + sgot->output_offset |
| 1039 | + off); |
| 1040 | outrel.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE); |
| 1041 | outrel.r_addend = relocation; |
| 1042 | loc = srelgot->contents; |
| 1043 | loc += srelgot->reloc_count * sizeof (Elf32_External_Rela); |
| 1044 | bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); |
| 1045 | ++srelgot->reloc_count; |
| 1046 | } |
| 1047 | |
| 1048 | local_got_offsets[r_symndx] |= 1; |
| 1049 | } |
| 1050 | |
| 1051 | |
| 1052 | relocation = sgot->output_offset + off; |
| 1053 | } |
| 1054 | |
| 1055 | /* Addend should be zero. */ |
| 1056 | if (rel->r_addend != 0) |
| 1057 | (*_bfd_error_handler) (_("internal error: addend should be zero for R_LM32_16_GOT")); |
| 1058 | |
| 1059 | r = _bfd_final_link_relocate (howto, |
| 1060 | input_bfd, |
| 1061 | input_section, |
| 1062 | contents, |
| 1063 | rel->r_offset, |
| 1064 | relocation, |
| 1065 | rel->r_addend); |
| 1066 | break; |
| 1067 | |
| 1068 | case R_LM32_GOTOFF_LO16: |
| 1069 | case R_LM32_GOTOFF_HI16: |
| 1070 | /* Relocation is offset from GOT. */ |
| 1071 | BFD_ASSERT (sgot != NULL); |
| 1072 | relocation -= sgot->output_section->vma; |
| 1073 | /* Account for sign-extension. */ |
| 1074 | if ((r_type == R_LM32_GOTOFF_HI16) |
| 1075 | && ((relocation + rel->r_addend) & 0x8000)) |
| 1076 | rel->r_addend += 0x10000; |
| 1077 | r = _bfd_final_link_relocate (howto, |
| 1078 | input_bfd, |
| 1079 | input_section, |
| 1080 | contents, |
| 1081 | rel->r_offset, |
| 1082 | relocation, |
| 1083 | rel->r_addend); |
| 1084 | break; |
| 1085 | |
| 1086 | case R_LM32_32: |
| 1087 | if (IS_FDPIC (output_bfd)) |
| 1088 | { |
| 1089 | if ((!h) || (h && h->root.type != bfd_link_hash_undefweak)) |
| 1090 | { |
| 1091 | /* Only create .rofixup entries for relocs in loadable sections. */ |
| 1092 | if ((bfd_get_section_flags (output_bfd, input_section->output_section) |
| 1093 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) |
| 1094 | |
| 1095 | { |
| 1096 | /* Check address to be modified is writable. */ |
| 1097 | if (_lm32fdpic_osec_readonly_p (output_bfd, |
| 1098 | input_section |
| 1099 | ->output_section)) |
| 1100 | { |
| 1101 | info->callbacks->warning |
| 1102 | (info, |
| 1103 | _("cannot emit dynamic relocations in read-only section"), |
| 1104 | name, input_bfd, input_section, rel->r_offset); |
| 1105 | return FALSE; |
| 1106 | } |
| 1107 | /* Create entry in .rofixup section. */ |
| 1108 | _lm32fdpic_add_rofixup (output_bfd, |
| 1109 | lm32fdpic_fixup32_section (info), |
| 1110 | input_section->output_section->vma |
| 1111 | + input_section->output_offset |
| 1112 | + rel->r_offset); |
| 1113 | } |
| 1114 | } |
| 1115 | } |
| 1116 | /* Fall through. */ |
| 1117 | |
| 1118 | default: |
| 1119 | r = _bfd_final_link_relocate (howto, |
| 1120 | input_bfd, |
| 1121 | input_section, |
| 1122 | contents, |
| 1123 | rel->r_offset, |
| 1124 | relocation, |
| 1125 | rel->r_addend); |
| 1126 | break; |
| 1127 | } |
| 1128 | } |
| 1129 | |
| 1130 | if (r != bfd_reloc_ok) |
| 1131 | { |
| 1132 | const char *msg = NULL; |
| 1133 | arelent bfd_reloc; |
| 1134 | |
| 1135 | lm32_info_to_howto_rela (input_bfd, &bfd_reloc, rel); |
| 1136 | howto = bfd_reloc.howto; |
| 1137 | |
| 1138 | if (h != NULL) |
| 1139 | name = h->root.root.string; |
| 1140 | else |
| 1141 | { |
| 1142 | name = (bfd_elf_string_from_elf_section |
| 1143 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 1144 | if (name == NULL || *name == '\0') |
| 1145 | name = bfd_section_name (input_bfd, sec); |
| 1146 | } |
| 1147 | |
| 1148 | switch (r) |
| 1149 | { |
| 1150 | case bfd_reloc_overflow: |
| 1151 | if ((h != NULL) |
| 1152 | && (h->root.type == bfd_link_hash_undefweak)) |
| 1153 | break; |
| 1154 | if (! ((*info->callbacks->reloc_overflow) |
| 1155 | (info, (h ? &h->root : NULL), name, howto->name, |
| 1156 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset))) |
| 1157 | return FALSE; |
| 1158 | break; |
| 1159 | |
| 1160 | case bfd_reloc_undefined: |
| 1161 | if (! ((*info->callbacks->undefined_symbol) |
| 1162 | (info, name, input_bfd, input_section, |
| 1163 | rel->r_offset, TRUE))) |
| 1164 | return FALSE; |
| 1165 | break; |
| 1166 | |
| 1167 | case bfd_reloc_outofrange: |
| 1168 | msg = _("internal error: out of range error"); |
| 1169 | goto common_error; |
| 1170 | |
| 1171 | case bfd_reloc_notsupported: |
| 1172 | msg = _("internal error: unsupported relocation error"); |
| 1173 | goto common_error; |
| 1174 | |
| 1175 | case bfd_reloc_dangerous: |
| 1176 | msg = _("internal error: dangerous error"); |
| 1177 | goto common_error; |
| 1178 | |
| 1179 | default: |
| 1180 | msg = _("internal error: unknown error"); |
| 1181 | /* fall through */ |
| 1182 | |
| 1183 | common_error: |
| 1184 | if (!((*info->callbacks->warning) |
| 1185 | (info, msg, name, input_bfd, input_section, |
| 1186 | rel->r_offset))) |
| 1187 | return FALSE; |
| 1188 | break; |
| 1189 | } |
| 1190 | } |
| 1191 | } |
| 1192 | |
| 1193 | return TRUE; |
| 1194 | } |
| 1195 | |
| 1196 | static asection * |
| 1197 | lm32_elf_gc_mark_hook (asection *sec, |
| 1198 | struct bfd_link_info *info, |
| 1199 | Elf_Internal_Rela *rel, |
| 1200 | struct elf_link_hash_entry *h, |
| 1201 | Elf_Internal_Sym *sym) |
| 1202 | { |
| 1203 | if (h != NULL) |
| 1204 | switch (ELF32_R_TYPE (rel->r_info)) |
| 1205 | { |
| 1206 | case R_LM32_GNU_VTINHERIT: |
| 1207 | case R_LM32_GNU_VTENTRY: |
| 1208 | return NULL; |
| 1209 | } |
| 1210 | |
| 1211 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 1212 | } |
| 1213 | |
| 1214 | static bfd_boolean |
| 1215 | lm32_elf_gc_sweep_hook (bfd *abfd, |
| 1216 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 1217 | asection *sec, |
| 1218 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) |
| 1219 | { |
| 1220 | /* Update the got entry reference counts for the section being removed. */ |
| 1221 | Elf_Internal_Shdr *symtab_hdr; |
| 1222 | struct elf_link_hash_entry **sym_hashes; |
| 1223 | bfd_signed_vma *local_got_refcounts; |
| 1224 | const Elf_Internal_Rela *rel, *relend; |
| 1225 | |
| 1226 | elf_section_data (sec)->local_dynrel = NULL; |
| 1227 | |
| 1228 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1229 | sym_hashes = elf_sym_hashes (abfd); |
| 1230 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 1231 | |
| 1232 | relend = relocs + sec->reloc_count; |
| 1233 | for (rel = relocs; rel < relend; rel++) |
| 1234 | { |
| 1235 | unsigned long r_symndx; |
| 1236 | struct elf_link_hash_entry *h = NULL; |
| 1237 | |
| 1238 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1239 | if (r_symndx >= symtab_hdr->sh_info) |
| 1240 | { |
| 1241 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1242 | while (h->root.type == bfd_link_hash_indirect |
| 1243 | || h->root.type == bfd_link_hash_warning) |
| 1244 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1245 | } |
| 1246 | |
| 1247 | switch (ELF32_R_TYPE (rel->r_info)) |
| 1248 | { |
| 1249 | case R_LM32_16_GOT: |
| 1250 | if (h != NULL) |
| 1251 | { |
| 1252 | if (h->got.refcount > 0) |
| 1253 | h->got.refcount--; |
| 1254 | } |
| 1255 | else |
| 1256 | { |
| 1257 | if (local_got_refcounts && local_got_refcounts[r_symndx] > 0) |
| 1258 | local_got_refcounts[r_symndx]--; |
| 1259 | } |
| 1260 | break; |
| 1261 | |
| 1262 | default: |
| 1263 | break; |
| 1264 | } |
| 1265 | } |
| 1266 | return TRUE; |
| 1267 | } |
| 1268 | |
| 1269 | /* Look through the relocs for a section during the first phase. */ |
| 1270 | |
| 1271 | static bfd_boolean |
| 1272 | lm32_elf_check_relocs (bfd *abfd, |
| 1273 | struct bfd_link_info *info, |
| 1274 | asection *sec, |
| 1275 | const Elf_Internal_Rela *relocs) |
| 1276 | { |
| 1277 | Elf_Internal_Shdr *symtab_hdr; |
| 1278 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; |
| 1279 | const Elf_Internal_Rela *rel; |
| 1280 | const Elf_Internal_Rela *rel_end; |
| 1281 | struct elf_lm32_link_hash_table *htab; |
| 1282 | bfd *dynobj; |
| 1283 | |
| 1284 | if (info->relocatable) |
| 1285 | return TRUE; |
| 1286 | |
| 1287 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1288 | sym_hashes = elf_sym_hashes (abfd); |
| 1289 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); |
| 1290 | if (!elf_bad_symtab (abfd)) |
| 1291 | sym_hashes_end -= symtab_hdr->sh_info; |
| 1292 | |
| 1293 | htab = lm32_elf_hash_table (info); |
| 1294 | if (htab == NULL) |
| 1295 | return FALSE; |
| 1296 | |
| 1297 | dynobj = htab->root.dynobj; |
| 1298 | |
| 1299 | rel_end = relocs + sec->reloc_count; |
| 1300 | for (rel = relocs; rel < rel_end; rel++) |
| 1301 | { |
| 1302 | int r_type; |
| 1303 | struct elf_link_hash_entry *h; |
| 1304 | unsigned long r_symndx; |
| 1305 | |
| 1306 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1307 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1308 | if (r_symndx < symtab_hdr->sh_info) |
| 1309 | h = NULL; |
| 1310 | else |
| 1311 | { |
| 1312 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1313 | while (h->root.type == bfd_link_hash_indirect |
| 1314 | || h->root.type == bfd_link_hash_warning) |
| 1315 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1316 | } |
| 1317 | |
| 1318 | /* Some relocs require a global offset table. */ |
| 1319 | if (htab->sgot == NULL) |
| 1320 | { |
| 1321 | switch (r_type) |
| 1322 | { |
| 1323 | case R_LM32_16_GOT: |
| 1324 | case R_LM32_GOTOFF_HI16: |
| 1325 | case R_LM32_GOTOFF_LO16: |
| 1326 | if (dynobj == NULL) |
| 1327 | htab->root.dynobj = dynobj = abfd; |
| 1328 | if (! create_got_section (dynobj, info)) |
| 1329 | return FALSE; |
| 1330 | break; |
| 1331 | } |
| 1332 | } |
| 1333 | |
| 1334 | /* Some relocs require a rofixup table. */ |
| 1335 | if (IS_FDPIC (abfd)) |
| 1336 | { |
| 1337 | switch (r_type) |
| 1338 | { |
| 1339 | case R_LM32_32: |
| 1340 | /* FDPIC requires a GOT if there is a .rofixup section |
| 1341 | (Normal ELF doesn't). */ |
| 1342 | if (dynobj == NULL) |
| 1343 | htab->root.dynobj = dynobj = abfd; |
| 1344 | if (! create_got_section (dynobj, info)) |
| 1345 | return FALSE; |
| 1346 | /* Create .rofixup section */ |
| 1347 | if (htab->sfixup32 == NULL) |
| 1348 | { |
| 1349 | if (! create_rofixup_section (abfd, info)) |
| 1350 | return FALSE; |
| 1351 | } |
| 1352 | break; |
| 1353 | case R_LM32_16_GOT: |
| 1354 | case R_LM32_GOTOFF_HI16: |
| 1355 | case R_LM32_GOTOFF_LO16: |
| 1356 | /* Create .rofixup section. */ |
| 1357 | if (htab->sfixup32 == NULL) |
| 1358 | { |
| 1359 | if (! create_rofixup_section (abfd, info)) |
| 1360 | return FALSE; |
| 1361 | } |
| 1362 | break; |
| 1363 | } |
| 1364 | } |
| 1365 | |
| 1366 | switch (r_type) |
| 1367 | { |
| 1368 | case R_LM32_16_GOT: |
| 1369 | if (h != NULL) |
| 1370 | h->got.refcount += 1; |
| 1371 | else |
| 1372 | { |
| 1373 | bfd_signed_vma *local_got_refcounts; |
| 1374 | |
| 1375 | /* This is a global offset table entry for a local symbol. */ |
| 1376 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 1377 | if (local_got_refcounts == NULL) |
| 1378 | { |
| 1379 | bfd_size_type size; |
| 1380 | |
| 1381 | size = symtab_hdr->sh_info; |
| 1382 | size *= sizeof (bfd_signed_vma); |
| 1383 | local_got_refcounts = bfd_zalloc (abfd, size); |
| 1384 | if (local_got_refcounts == NULL) |
| 1385 | return FALSE; |
| 1386 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 1387 | } |
| 1388 | local_got_refcounts[r_symndx] += 1; |
| 1389 | } |
| 1390 | break; |
| 1391 | |
| 1392 | /* This relocation describes the C++ object vtable hierarchy. |
| 1393 | Reconstruct it for later use during GC. */ |
| 1394 | case R_LM32_GNU_VTINHERIT: |
| 1395 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 1396 | return FALSE; |
| 1397 | break; |
| 1398 | |
| 1399 | /* This relocation describes which C++ vtable entries are actually |
| 1400 | used. Record for later use during GC. */ |
| 1401 | case R_LM32_GNU_VTENTRY: |
| 1402 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 1403 | return FALSE; |
| 1404 | break; |
| 1405 | |
| 1406 | } |
| 1407 | } |
| 1408 | |
| 1409 | return TRUE; |
| 1410 | } |
| 1411 | |
| 1412 | /* Finish up the dynamic sections. */ |
| 1413 | |
| 1414 | static bfd_boolean |
| 1415 | lm32_elf_finish_dynamic_sections (bfd *output_bfd, |
| 1416 | struct bfd_link_info *info) |
| 1417 | { |
| 1418 | struct elf_lm32_link_hash_table *htab; |
| 1419 | bfd *dynobj; |
| 1420 | asection *sdyn; |
| 1421 | asection *sgot; |
| 1422 | |
| 1423 | htab = lm32_elf_hash_table (info); |
| 1424 | if (htab == NULL) |
| 1425 | return FALSE; |
| 1426 | |
| 1427 | dynobj = htab->root.dynobj; |
| 1428 | |
| 1429 | sgot = htab->sgotplt; |
| 1430 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 1431 | |
| 1432 | if (htab->root.dynamic_sections_created) |
| 1433 | { |
| 1434 | asection *splt; |
| 1435 | Elf32_External_Dyn *dyncon, *dynconend; |
| 1436 | |
| 1437 | BFD_ASSERT (sgot != NULL && sdyn != NULL); |
| 1438 | |
| 1439 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 1440 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 1441 | |
| 1442 | for (; dyncon < dynconend; dyncon++) |
| 1443 | { |
| 1444 | Elf_Internal_Dyn dyn; |
| 1445 | asection *s; |
| 1446 | |
| 1447 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 1448 | |
| 1449 | switch (dyn.d_tag) |
| 1450 | { |
| 1451 | default: |
| 1452 | break; |
| 1453 | |
| 1454 | case DT_PLTGOT: |
| 1455 | s = htab->sgot->output_section; |
| 1456 | goto get_vma; |
| 1457 | case DT_JMPREL: |
| 1458 | s = htab->srelplt->output_section; |
| 1459 | get_vma: |
| 1460 | BFD_ASSERT (s != NULL); |
| 1461 | dyn.d_un.d_ptr = s->vma; |
| 1462 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 1463 | break; |
| 1464 | |
| 1465 | case DT_PLTRELSZ: |
| 1466 | s = htab->srelplt->output_section; |
| 1467 | BFD_ASSERT (s != NULL); |
| 1468 | dyn.d_un.d_val = s->size; |
| 1469 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 1470 | break; |
| 1471 | |
| 1472 | case DT_RELASZ: |
| 1473 | /* My reading of the SVR4 ABI indicates that the |
| 1474 | procedure linkage table relocs (DT_JMPREL) should be |
| 1475 | included in the overall relocs (DT_RELA). This is |
| 1476 | what Solaris does. However, UnixWare can not handle |
| 1477 | that case. Therefore, we override the DT_RELASZ entry |
| 1478 | here to make it not include the JMPREL relocs. Since |
| 1479 | the linker script arranges for .rela.plt to follow all |
| 1480 | other relocation sections, we don't have to worry |
| 1481 | about changing the DT_RELA entry. */ |
| 1482 | if (htab->srelplt != NULL) |
| 1483 | { |
| 1484 | s = htab->srelplt->output_section; |
| 1485 | dyn.d_un.d_val -= s->size; |
| 1486 | } |
| 1487 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 1488 | break; |
| 1489 | } |
| 1490 | } |
| 1491 | |
| 1492 | /* Fill in the first entry in the procedure linkage table. */ |
| 1493 | splt = htab->splt; |
| 1494 | if (splt && splt->size > 0) |
| 1495 | { |
| 1496 | if (info->shared) |
| 1497 | { |
| 1498 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents); |
| 1499 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4); |
| 1500 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8); |
| 1501 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12); |
| 1502 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16); |
| 1503 | } |
| 1504 | else |
| 1505 | { |
| 1506 | unsigned long addr; |
| 1507 | /* addr = .got + 4 */ |
| 1508 | addr = sgot->output_section->vma + sgot->output_offset + 4; |
| 1509 | bfd_put_32 (output_bfd, |
| 1510 | PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), |
| 1511 | splt->contents); |
| 1512 | bfd_put_32 (output_bfd, |
| 1513 | PLT0_ENTRY_WORD1 | (addr & 0xffff), |
| 1514 | splt->contents + 4); |
| 1515 | bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); |
| 1516 | bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); |
| 1517 | bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); |
| 1518 | } |
| 1519 | |
| 1520 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = |
| 1521 | PLT_ENTRY_SIZE; |
| 1522 | } |
| 1523 | } |
| 1524 | |
| 1525 | /* Fill in the first three entries in the global offset table. */ |
| 1526 | if (sgot && sgot->size > 0) |
| 1527 | { |
| 1528 | if (sdyn == NULL) |
| 1529 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
| 1530 | else |
| 1531 | bfd_put_32 (output_bfd, |
| 1532 | sdyn->output_section->vma + sdyn->output_offset, |
| 1533 | sgot->contents); |
| 1534 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); |
| 1535 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); |
| 1536 | |
| 1537 | /* FIXME: This can be null if create_dynamic_sections wasn't called. */ |
| 1538 | if (elf_section_data (sgot->output_section) != NULL) |
| 1539 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| 1540 | } |
| 1541 | |
| 1542 | if (lm32fdpic_fixup32_section (info)) |
| 1543 | { |
| 1544 | struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot; |
| 1545 | bfd_vma got_value = hgot->root.u.def.value |
| 1546 | + hgot->root.u.def.section->output_section->vma |
| 1547 | + hgot->root.u.def.section->output_offset; |
| 1548 | struct bfd_link_hash_entry *hend; |
| 1549 | |
| 1550 | /* Last entry is pointer to GOT. */ |
| 1551 | _lm32fdpic_add_rofixup (output_bfd, lm32fdpic_fixup32_section (info), got_value); |
| 1552 | |
| 1553 | /* Check we wrote enough entries. */ |
| 1554 | if (lm32fdpic_fixup32_section (info)->size |
| 1555 | != (lm32fdpic_fixup32_section (info)->reloc_count * 4)) |
| 1556 | { |
| 1557 | (*_bfd_error_handler) |
| 1558 | ("LINKER BUG: .rofixup section size mismatch: size/4 %d != relocs %d", |
| 1559 | lm32fdpic_fixup32_section (info)->size/4, |
| 1560 | lm32fdpic_fixup32_section (info)->reloc_count); |
| 1561 | return FALSE; |
| 1562 | } |
| 1563 | |
| 1564 | hend = bfd_link_hash_lookup (info->hash, "__ROFIXUP_END__", |
| 1565 | FALSE, FALSE, TRUE); |
| 1566 | if (hend |
| 1567 | && (hend->type == bfd_link_hash_defined |
| 1568 | || hend->type == bfd_link_hash_defweak)) |
| 1569 | { |
| 1570 | bfd_vma value = |
| 1571 | lm32fdpic_fixup32_section (info)->output_section->vma |
| 1572 | + lm32fdpic_fixup32_section (info)->output_offset |
| 1573 | + lm32fdpic_fixup32_section (info)->size |
| 1574 | - hend->u.def.section->output_section->vma |
| 1575 | - hend->u.def.section->output_offset; |
| 1576 | BFD_ASSERT (hend->u.def.value == value); |
| 1577 | if (hend->u.def.value != value) |
| 1578 | { |
| 1579 | (*_bfd_error_handler) |
| 1580 | ("LINKER BUG: .rofixup section hend->u.def.value != value: %ld != %ld", hend->u.def.value, value); |
| 1581 | return FALSE; |
| 1582 | } |
| 1583 | } |
| 1584 | } |
| 1585 | |
| 1586 | return TRUE; |
| 1587 | } |
| 1588 | |
| 1589 | /* Finish up dynamic symbol handling. We set the contents of various |
| 1590 | dynamic sections here. */ |
| 1591 | |
| 1592 | static bfd_boolean |
| 1593 | lm32_elf_finish_dynamic_symbol (bfd *output_bfd, |
| 1594 | struct bfd_link_info *info, |
| 1595 | struct elf_link_hash_entry *h, |
| 1596 | Elf_Internal_Sym *sym) |
| 1597 | { |
| 1598 | struct elf_lm32_link_hash_table *htab; |
| 1599 | bfd_byte *loc; |
| 1600 | |
| 1601 | htab = lm32_elf_hash_table (info); |
| 1602 | if (htab == NULL) |
| 1603 | return FALSE; |
| 1604 | |
| 1605 | if (h->plt.offset != (bfd_vma) -1) |
| 1606 | { |
| 1607 | asection *splt; |
| 1608 | asection *sgot; |
| 1609 | asection *srela; |
| 1610 | |
| 1611 | bfd_vma plt_index; |
| 1612 | bfd_vma got_offset; |
| 1613 | Elf_Internal_Rela rela; |
| 1614 | |
| 1615 | /* This symbol has an entry in the procedure linkage table. Set |
| 1616 | it up. */ |
| 1617 | BFD_ASSERT (h->dynindx != -1); |
| 1618 | |
| 1619 | splt = htab->splt; |
| 1620 | sgot = htab->sgotplt; |
| 1621 | srela = htab->srelplt; |
| 1622 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); |
| 1623 | |
| 1624 | /* Get the index in the procedure linkage table which |
| 1625 | corresponds to this symbol. This is the index of this symbol |
| 1626 | in all the symbols for which we are making plt entries. The |
| 1627 | first entry in the procedure linkage table is reserved. */ |
| 1628 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; |
| 1629 | |
| 1630 | /* Get the offset into the .got table of the entry that |
| 1631 | corresponds to this function. Each .got entry is 4 bytes. |
| 1632 | The first three are reserved. */ |
| 1633 | got_offset = (plt_index + 3) * 4; |
| 1634 | |
| 1635 | /* Fill in the entry in the procedure linkage table. */ |
| 1636 | if (! info->shared) |
| 1637 | { |
| 1638 | /* TODO */ |
| 1639 | } |
| 1640 | else |
| 1641 | { |
| 1642 | /* TODO */ |
| 1643 | } |
| 1644 | |
| 1645 | /* Fill in the entry in the global offset table. */ |
| 1646 | bfd_put_32 (output_bfd, |
| 1647 | (splt->output_section->vma |
| 1648 | + splt->output_offset |
| 1649 | + h->plt.offset |
| 1650 | + 12), /* same offset */ |
| 1651 | sgot->contents + got_offset); |
| 1652 | |
| 1653 | /* Fill in the entry in the .rela.plt section. */ |
| 1654 | rela.r_offset = (sgot->output_section->vma |
| 1655 | + sgot->output_offset |
| 1656 | + got_offset); |
| 1657 | rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_JMP_SLOT); |
| 1658 | rela.r_addend = 0; |
| 1659 | loc = srela->contents; |
| 1660 | loc += plt_index * sizeof (Elf32_External_Rela); |
| 1661 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 1662 | |
| 1663 | if (!h->def_regular) |
| 1664 | { |
| 1665 | /* Mark the symbol as undefined, rather than as defined in |
| 1666 | the .plt section. Leave the value alone. */ |
| 1667 | sym->st_shndx = SHN_UNDEF; |
| 1668 | } |
| 1669 | |
| 1670 | } |
| 1671 | |
| 1672 | if (h->got.offset != (bfd_vma) -1) |
| 1673 | { |
| 1674 | asection *sgot; |
| 1675 | asection *srela; |
| 1676 | Elf_Internal_Rela rela; |
| 1677 | |
| 1678 | /* This symbol has an entry in the global offset table. Set it |
| 1679 | up. */ |
| 1680 | sgot = htab->sgot; |
| 1681 | srela = htab->srelgot; |
| 1682 | BFD_ASSERT (sgot != NULL && srela != NULL); |
| 1683 | |
| 1684 | rela.r_offset = (sgot->output_section->vma |
| 1685 | + sgot->output_offset |
| 1686 | + (h->got.offset &~ 1)); |
| 1687 | |
| 1688 | /* If this is a -Bsymbolic link, and the symbol is defined |
| 1689 | locally, we just want to emit a RELATIVE reloc. Likewise if |
| 1690 | the symbol was forced to be local because of a version file. |
| 1691 | The entry in the global offset table will already have been |
| 1692 | initialized in the relocate_section function. */ |
| 1693 | if (info->shared |
| 1694 | && (info->symbolic |
| 1695 | || h->dynindx == -1 |
| 1696 | || h->forced_local) |
| 1697 | && h->def_regular) |
| 1698 | { |
| 1699 | rela.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE); |
| 1700 | rela.r_addend = (h->root.u.def.value |
| 1701 | + h->root.u.def.section->output_section->vma |
| 1702 | + h->root.u.def.section->output_offset); |
| 1703 | } |
| 1704 | else |
| 1705 | { |
| 1706 | BFD_ASSERT ((h->got.offset & 1) == 0); |
| 1707 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); |
| 1708 | rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_GLOB_DAT); |
| 1709 | rela.r_addend = 0; |
| 1710 | } |
| 1711 | |
| 1712 | loc = srela->contents; |
| 1713 | loc += srela->reloc_count * sizeof (Elf32_External_Rela); |
| 1714 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 1715 | ++srela->reloc_count; |
| 1716 | } |
| 1717 | |
| 1718 | if (h->needs_copy) |
| 1719 | { |
| 1720 | asection *s; |
| 1721 | Elf_Internal_Rela rela; |
| 1722 | |
| 1723 | /* This symbols needs a copy reloc. Set it up. */ |
| 1724 | BFD_ASSERT (h->dynindx != -1 |
| 1725 | && (h->root.type == bfd_link_hash_defined |
| 1726 | || h->root.type == bfd_link_hash_defweak)); |
| 1727 | |
| 1728 | s = bfd_get_section_by_name (h->root.u.def.section->owner, |
| 1729 | ".rela.bss"); |
| 1730 | BFD_ASSERT (s != NULL); |
| 1731 | |
| 1732 | rela.r_offset = (h->root.u.def.value |
| 1733 | + h->root.u.def.section->output_section->vma |
| 1734 | + h->root.u.def.section->output_offset); |
| 1735 | rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_COPY); |
| 1736 | rela.r_addend = 0; |
| 1737 | loc = s->contents; |
| 1738 | loc += s->reloc_count * sizeof (Elf32_External_Rela); |
| 1739 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 1740 | ++s->reloc_count; |
| 1741 | } |
| 1742 | |
| 1743 | /* Mark some specially defined symbols as absolute. */ |
| 1744 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 1745 | || h == htab->root.hgot) |
| 1746 | sym->st_shndx = SHN_ABS; |
| 1747 | |
| 1748 | return TRUE; |
| 1749 | } |
| 1750 | |
| 1751 | static enum elf_reloc_type_class |
| 1752 | lm32_elf_reloc_type_class (const Elf_Internal_Rela *rela) |
| 1753 | { |
| 1754 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 1755 | { |
| 1756 | case R_LM32_RELATIVE: return reloc_class_relative; |
| 1757 | case R_LM32_JMP_SLOT: return reloc_class_plt; |
| 1758 | case R_LM32_COPY: return reloc_class_copy; |
| 1759 | default: return reloc_class_normal; |
| 1760 | } |
| 1761 | } |
| 1762 | |
| 1763 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 1764 | regular object. The current definition is in some section of the |
| 1765 | dynamic object, but we're not including those sections. We have to |
| 1766 | change the definition to something the rest of the link can |
| 1767 | understand. */ |
| 1768 | |
| 1769 | static bfd_boolean |
| 1770 | lm32_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 1771 | struct elf_link_hash_entry *h) |
| 1772 | { |
| 1773 | struct elf_lm32_link_hash_table *htab; |
| 1774 | struct elf_lm32_link_hash_entry *eh; |
| 1775 | struct elf_lm32_dyn_relocs *p; |
| 1776 | bfd *dynobj; |
| 1777 | asection *s; |
| 1778 | |
| 1779 | dynobj = elf_hash_table (info)->dynobj; |
| 1780 | |
| 1781 | /* Make sure we know what is going on here. */ |
| 1782 | BFD_ASSERT (dynobj != NULL |
| 1783 | && (h->needs_plt |
| 1784 | || h->u.weakdef != NULL |
| 1785 | || (h->def_dynamic |
| 1786 | && h->ref_regular |
| 1787 | && !h->def_regular))); |
| 1788 | |
| 1789 | /* If this is a function, put it in the procedure linkage table. We |
| 1790 | will fill in the contents of the procedure linkage table later, |
| 1791 | when we know the address of the .got section. */ |
| 1792 | if (h->type == STT_FUNC |
| 1793 | || h->needs_plt) |
| 1794 | { |
| 1795 | if (! info->shared |
| 1796 | && !h->def_dynamic |
| 1797 | && !h->ref_dynamic |
| 1798 | && h->root.type != bfd_link_hash_undefweak |
| 1799 | && h->root.type != bfd_link_hash_undefined) |
| 1800 | { |
| 1801 | /* This case can occur if we saw a PLT reloc in an input |
| 1802 | file, but the symbol was never referred to by a dynamic |
| 1803 | object. In such a case, we don't actually need to build |
| 1804 | a procedure linkage table, and we can just do a PCREL |
| 1805 | reloc instead. */ |
| 1806 | h->plt.offset = (bfd_vma) -1; |
| 1807 | h->needs_plt = 0; |
| 1808 | } |
| 1809 | |
| 1810 | return TRUE; |
| 1811 | } |
| 1812 | else |
| 1813 | h->plt.offset = (bfd_vma) -1; |
| 1814 | |
| 1815 | /* If this is a weak symbol, and there is a real definition, the |
| 1816 | processor independent code will have arranged for us to see the |
| 1817 | real definition first, and we can just use the same value. */ |
| 1818 | if (h->u.weakdef != NULL) |
| 1819 | { |
| 1820 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 1821 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 1822 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 1823 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 1824 | return TRUE; |
| 1825 | } |
| 1826 | |
| 1827 | /* This is a reference to a symbol defined by a dynamic object which |
| 1828 | is not a function. */ |
| 1829 | |
| 1830 | /* If we are creating a shared library, we must presume that the |
| 1831 | only references to the symbol are via the global offset table. |
| 1832 | For such cases we need not do anything here; the relocations will |
| 1833 | be handled correctly by relocate_section. */ |
| 1834 | if (info->shared) |
| 1835 | return TRUE; |
| 1836 | |
| 1837 | /* If there are no references to this symbol that do not use the |
| 1838 | GOT, we don't need to generate a copy reloc. */ |
| 1839 | if (!h->non_got_ref) |
| 1840 | return TRUE; |
| 1841 | |
| 1842 | /* If -z nocopyreloc was given, we won't generate them either. */ |
| 1843 | if (info->nocopyreloc) |
| 1844 | { |
| 1845 | h->non_got_ref = 0; |
| 1846 | return TRUE; |
| 1847 | } |
| 1848 | |
| 1849 | eh = (struct elf_lm32_link_hash_entry *) h; |
| 1850 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 1851 | { |
| 1852 | s = p->sec->output_section; |
| 1853 | if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0) |
| 1854 | break; |
| 1855 | } |
| 1856 | |
| 1857 | /* If we didn't find any dynamic relocs in sections which needs the |
| 1858 | copy reloc, then we'll be keeping the dynamic relocs and avoiding |
| 1859 | the copy reloc. */ |
| 1860 | if (p == NULL) |
| 1861 | { |
| 1862 | h->non_got_ref = 0; |
| 1863 | return TRUE; |
| 1864 | } |
| 1865 | |
| 1866 | if (h->size == 0) |
| 1867 | { |
| 1868 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), |
| 1869 | h->root.root.string); |
| 1870 | return TRUE; |
| 1871 | } |
| 1872 | |
| 1873 | /* We must allocate the symbol in our .dynbss section, which will |
| 1874 | become part of the .bss section of the executable. There will be |
| 1875 | an entry for this symbol in the .dynsym section. The dynamic |
| 1876 | object will contain position independent code, so all references |
| 1877 | from the dynamic object to this symbol will go through the global |
| 1878 | offset table. The dynamic linker will use the .dynsym entry to |
| 1879 | determine the address it must put in the global offset table, so |
| 1880 | both the dynamic object and the regular object will refer to the |
| 1881 | same memory location for the variable. */ |
| 1882 | |
| 1883 | htab = lm32_elf_hash_table (info); |
| 1884 | if (htab == NULL) |
| 1885 | return FALSE; |
| 1886 | |
| 1887 | s = htab->sdynbss; |
| 1888 | BFD_ASSERT (s != NULL); |
| 1889 | |
| 1890 | /* We must generate a R_LM32_COPY reloc to tell the dynamic linker |
| 1891 | to copy the initial value out of the dynamic object and into the |
| 1892 | runtime process image. We need to remember the offset into the |
| 1893 | .rela.bss section we are going to use. */ |
| 1894 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 1895 | { |
| 1896 | asection *srel; |
| 1897 | |
| 1898 | srel = htab->srelbss; |
| 1899 | BFD_ASSERT (srel != NULL); |
| 1900 | srel->size += sizeof (Elf32_External_Rela); |
| 1901 | h->needs_copy = 1; |
| 1902 | } |
| 1903 | |
| 1904 | return _bfd_elf_adjust_dynamic_copy (h, s); |
| 1905 | } |
| 1906 | |
| 1907 | /* Allocate space in .plt, .got and associated reloc sections for |
| 1908 | dynamic relocs. */ |
| 1909 | |
| 1910 | static bfd_boolean |
| 1911 | allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
| 1912 | { |
| 1913 | struct bfd_link_info *info; |
| 1914 | struct elf_lm32_link_hash_table *htab; |
| 1915 | struct elf_lm32_link_hash_entry *eh; |
| 1916 | struct elf_lm32_dyn_relocs *p; |
| 1917 | |
| 1918 | if (h->root.type == bfd_link_hash_indirect) |
| 1919 | return TRUE; |
| 1920 | |
| 1921 | if (h->root.type == bfd_link_hash_warning) |
| 1922 | /* When warning symbols are created, they **replace** the "real" |
| 1923 | entry in the hash table, thus we never get to see the real |
| 1924 | symbol in a hash traversal. So look at it now. */ |
| 1925 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1926 | |
| 1927 | info = (struct bfd_link_info *) inf; |
| 1928 | htab = lm32_elf_hash_table (info); |
| 1929 | if (htab == NULL) |
| 1930 | return FALSE; |
| 1931 | |
| 1932 | eh = (struct elf_lm32_link_hash_entry *) h; |
| 1933 | |
| 1934 | if (htab->root.dynamic_sections_created |
| 1935 | && h->plt.refcount > 0) |
| 1936 | { |
| 1937 | /* Make sure this symbol is output as a dynamic symbol. |
| 1938 | Undefined weak syms won't yet be marked as dynamic. */ |
| 1939 | if (h->dynindx == -1 |
| 1940 | && !h->forced_local) |
| 1941 | { |
| 1942 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1943 | return FALSE; |
| 1944 | } |
| 1945 | |
| 1946 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h)) |
| 1947 | { |
| 1948 | asection *s = htab->splt; |
| 1949 | |
| 1950 | /* If this is the first .plt entry, make room for the special |
| 1951 | first entry. */ |
| 1952 | if (s->size == 0) |
| 1953 | s->size += PLT_ENTRY_SIZE; |
| 1954 | |
| 1955 | h->plt.offset = s->size; |
| 1956 | |
| 1957 | /* If this symbol is not defined in a regular file, and we are |
| 1958 | not generating a shared library, then set the symbol to this |
| 1959 | location in the .plt. This is required to make function |
| 1960 | pointers compare as equal between the normal executable and |
| 1961 | the shared library. */ |
| 1962 | if (! info->shared |
| 1963 | && !h->def_regular) |
| 1964 | { |
| 1965 | h->root.u.def.section = s; |
| 1966 | h->root.u.def.value = h->plt.offset; |
| 1967 | } |
| 1968 | |
| 1969 | /* Make room for this entry. */ |
| 1970 | s->size += PLT_ENTRY_SIZE; |
| 1971 | |
| 1972 | /* We also need to make an entry in the .got.plt section, which |
| 1973 | will be placed in the .got section by the linker script. */ |
| 1974 | htab->sgotplt->size += 4; |
| 1975 | |
| 1976 | /* We also need to make an entry in the .rel.plt section. */ |
| 1977 | htab->srelplt->size += sizeof (Elf32_External_Rela); |
| 1978 | } |
| 1979 | else |
| 1980 | { |
| 1981 | h->plt.offset = (bfd_vma) -1; |
| 1982 | h->needs_plt = 0; |
| 1983 | } |
| 1984 | } |
| 1985 | else |
| 1986 | { |
| 1987 | h->plt.offset = (bfd_vma) -1; |
| 1988 | h->needs_plt = 0; |
| 1989 | } |
| 1990 | |
| 1991 | if (h->got.refcount > 0) |
| 1992 | { |
| 1993 | asection *s; |
| 1994 | bfd_boolean dyn; |
| 1995 | |
| 1996 | /* Make sure this symbol is output as a dynamic symbol. |
| 1997 | Undefined weak syms won't yet be marked as dynamic. */ |
| 1998 | if (h->dynindx == -1 |
| 1999 | && !h->forced_local) |
| 2000 | { |
| 2001 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 2002 | return FALSE; |
| 2003 | } |
| 2004 | |
| 2005 | s = htab->sgot; |
| 2006 | |
| 2007 | h->got.offset = s->size; |
| 2008 | s->size += 4; |
| 2009 | dyn = htab->root.dynamic_sections_created; |
| 2010 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)) |
| 2011 | htab->srelgot->size += sizeof (Elf32_External_Rela); |
| 2012 | } |
| 2013 | else |
| 2014 | h->got.offset = (bfd_vma) -1; |
| 2015 | |
| 2016 | if (eh->dyn_relocs == NULL) |
| 2017 | return TRUE; |
| 2018 | |
| 2019 | /* In the shared -Bsymbolic case, discard space allocated for |
| 2020 | dynamic pc-relative relocs against symbols which turn out to be |
| 2021 | defined in regular objects. For the normal shared case, discard |
| 2022 | space for pc-relative relocs that have become local due to symbol |
| 2023 | visibility changes. */ |
| 2024 | |
| 2025 | if (info->shared) |
| 2026 | { |
| 2027 | if (h->def_regular |
| 2028 | && (h->forced_local |
| 2029 | || info->symbolic)) |
| 2030 | { |
| 2031 | struct elf_lm32_dyn_relocs **pp; |
| 2032 | |
| 2033 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL;) |
| 2034 | { |
| 2035 | p->count -= p->pc_count; |
| 2036 | p->pc_count = 0; |
| 2037 | if (p->count == 0) |
| 2038 | *pp = p->next; |
| 2039 | else |
| 2040 | pp = &p->next; |
| 2041 | } |
| 2042 | } |
| 2043 | |
| 2044 | /* Also discard relocs on undefined weak syms with non-default |
| 2045 | visibility. */ |
| 2046 | if (eh->dyn_relocs != NULL |
| 2047 | && h->root.type == bfd_link_hash_undefweak) |
| 2048 | { |
| 2049 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 2050 | eh->dyn_relocs = NULL; |
| 2051 | |
| 2052 | /* Make sure undefined weak symbols are output as a dynamic |
| 2053 | symbol in PIEs. */ |
| 2054 | else if (h->dynindx == -1 |
| 2055 | && !h->forced_local) |
| 2056 | { |
| 2057 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 2058 | return FALSE; |
| 2059 | } |
| 2060 | } |
| 2061 | } |
| 2062 | else |
| 2063 | { |
| 2064 | /* For the non-shared case, discard space for relocs against |
| 2065 | symbols which turn out to need copy relocs or are not |
| 2066 | dynamic. */ |
| 2067 | |
| 2068 | if (!h->non_got_ref |
| 2069 | && ((h->def_dynamic |
| 2070 | && !h->def_regular) |
| 2071 | || (htab->root.dynamic_sections_created |
| 2072 | && (h->root.type == bfd_link_hash_undefweak |
| 2073 | || h->root.type == bfd_link_hash_undefined)))) |
| 2074 | { |
| 2075 | /* Make sure this symbol is output as a dynamic symbol. |
| 2076 | Undefined weak syms won't yet be marked as dynamic. */ |
| 2077 | if (h->dynindx == -1 |
| 2078 | && !h->forced_local) |
| 2079 | { |
| 2080 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 2081 | return FALSE; |
| 2082 | } |
| 2083 | |
| 2084 | /* If that succeeded, we know we'll be keeping all the |
| 2085 | relocs. */ |
| 2086 | if (h->dynindx != -1) |
| 2087 | goto keep; |
| 2088 | } |
| 2089 | |
| 2090 | eh->dyn_relocs = NULL; |
| 2091 | |
| 2092 | keep: ; |
| 2093 | } |
| 2094 | |
| 2095 | /* Finally, allocate space. */ |
| 2096 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 2097 | { |
| 2098 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
| 2099 | sreloc->size += p->count * sizeof (Elf32_External_Rela); |
| 2100 | } |
| 2101 | |
| 2102 | return TRUE; |
| 2103 | } |
| 2104 | |
| 2105 | /* Find any dynamic relocs that apply to read-only sections. */ |
| 2106 | |
| 2107 | static bfd_boolean |
| 2108 | readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
| 2109 | { |
| 2110 | struct elf_lm32_link_hash_entry *eh; |
| 2111 | struct elf_lm32_dyn_relocs *p; |
| 2112 | |
| 2113 | if (h->root.type == bfd_link_hash_warning) |
| 2114 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 2115 | |
| 2116 | eh = (struct elf_lm32_link_hash_entry *) h; |
| 2117 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 2118 | { |
| 2119 | asection *s = p->sec->output_section; |
| 2120 | |
| 2121 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 2122 | { |
| 2123 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| 2124 | |
| 2125 | info->flags |= DF_TEXTREL; |
| 2126 | |
| 2127 | /* Not an error, just cut short the traversal. */ |
| 2128 | return FALSE; |
| 2129 | } |
| 2130 | } |
| 2131 | return TRUE; |
| 2132 | } |
| 2133 | |
| 2134 | /* Set the sizes of the dynamic sections. */ |
| 2135 | |
| 2136 | static bfd_boolean |
| 2137 | lm32_elf_size_dynamic_sections (bfd *output_bfd, |
| 2138 | struct bfd_link_info *info) |
| 2139 | { |
| 2140 | struct elf_lm32_link_hash_table *htab; |
| 2141 | bfd *dynobj; |
| 2142 | asection *s; |
| 2143 | bfd_boolean relocs; |
| 2144 | bfd *ibfd; |
| 2145 | |
| 2146 | htab = lm32_elf_hash_table (info); |
| 2147 | if (htab == NULL) |
| 2148 | return FALSE; |
| 2149 | |
| 2150 | dynobj = htab->root.dynobj; |
| 2151 | BFD_ASSERT (dynobj != NULL); |
| 2152 | |
| 2153 | if (htab->root.dynamic_sections_created) |
| 2154 | { |
| 2155 | /* Set the contents of the .interp section to the interpreter. */ |
| 2156 | if (info->executable) |
| 2157 | { |
| 2158 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 2159 | BFD_ASSERT (s != NULL); |
| 2160 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 2161 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 2162 | } |
| 2163 | } |
| 2164 | |
| 2165 | /* Set up .got offsets for local syms, and space for local dynamic |
| 2166 | relocs. */ |
| 2167 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 2168 | { |
| 2169 | bfd_signed_vma *local_got; |
| 2170 | bfd_signed_vma *end_local_got; |
| 2171 | bfd_size_type locsymcount; |
| 2172 | Elf_Internal_Shdr *symtab_hdr; |
| 2173 | asection *srel; |
| 2174 | |
| 2175 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
| 2176 | continue; |
| 2177 | |
| 2178 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 2179 | { |
| 2180 | struct elf_lm32_dyn_relocs *p; |
| 2181 | |
| 2182 | for (p = ((struct elf_lm32_dyn_relocs *) |
| 2183 | elf_section_data (s)->local_dynrel); |
| 2184 | p != NULL; |
| 2185 | p = p->next) |
| 2186 | { |
| 2187 | if (! bfd_is_abs_section (p->sec) |
| 2188 | && bfd_is_abs_section (p->sec->output_section)) |
| 2189 | { |
| 2190 | /* Input section has been discarded, either because |
| 2191 | it is a copy of a linkonce section or due to |
| 2192 | linker script /DISCARD/, so we'll be discarding |
| 2193 | the relocs too. */ |
| 2194 | } |
| 2195 | else if (p->count != 0) |
| 2196 | { |
| 2197 | srel = elf_section_data (p->sec)->sreloc; |
| 2198 | srel->size += p->count * sizeof (Elf32_External_Rela); |
| 2199 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| 2200 | info->flags |= DF_TEXTREL; |
| 2201 | } |
| 2202 | } |
| 2203 | } |
| 2204 | |
| 2205 | local_got = elf_local_got_refcounts (ibfd); |
| 2206 | if (!local_got) |
| 2207 | continue; |
| 2208 | |
| 2209 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 2210 | locsymcount = symtab_hdr->sh_info; |
| 2211 | end_local_got = local_got + locsymcount; |
| 2212 | s = htab->sgot; |
| 2213 | srel = htab->srelgot; |
| 2214 | for (; local_got < end_local_got; ++local_got) |
| 2215 | { |
| 2216 | if (*local_got > 0) |
| 2217 | { |
| 2218 | *local_got = s->size; |
| 2219 | s->size += 4; |
| 2220 | if (info->shared) |
| 2221 | srel->size += sizeof (Elf32_External_Rela); |
| 2222 | } |
| 2223 | else |
| 2224 | *local_got = (bfd_vma) -1; |
| 2225 | } |
| 2226 | } |
| 2227 | |
| 2228 | /* Allocate global sym .plt and .got entries, and space for global |
| 2229 | sym dynamic relocs. */ |
| 2230 | elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info); |
| 2231 | |
| 2232 | /* We now have determined the sizes of the various dynamic sections. |
| 2233 | Allocate memory for them. */ |
| 2234 | relocs = FALSE; |
| 2235 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 2236 | { |
| 2237 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 2238 | continue; |
| 2239 | |
| 2240 | if (s == htab->splt |
| 2241 | || s == htab->sgot |
| 2242 | || s == htab->sgotplt |
| 2243 | || s == htab->sdynbss) |
| 2244 | { |
| 2245 | /* Strip this section if we don't need it; see the |
| 2246 | comment below. */ |
| 2247 | } |
| 2248 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
| 2249 | { |
| 2250 | if (s->size != 0 && s != htab->srelplt) |
| 2251 | relocs = TRUE; |
| 2252 | |
| 2253 | /* We use the reloc_count field as a counter if we need |
| 2254 | to copy relocs into the output file. */ |
| 2255 | s->reloc_count = 0; |
| 2256 | } |
| 2257 | else |
| 2258 | /* It's not one of our sections, so don't allocate space. */ |
| 2259 | continue; |
| 2260 | |
| 2261 | if (s->size == 0) |
| 2262 | { |
| 2263 | /* If we don't need this section, strip it from the |
| 2264 | output file. This is mostly to handle .rela.bss and |
| 2265 | .rela.plt. We must create both sections in |
| 2266 | create_dynamic_sections, because they must be created |
| 2267 | before the linker maps input sections to output |
| 2268 | sections. The linker does that before |
| 2269 | adjust_dynamic_symbol is called, and it is that |
| 2270 | function which decides whether anything needs to go |
| 2271 | into these sections. */ |
| 2272 | s->flags |= SEC_EXCLUDE; |
| 2273 | continue; |
| 2274 | } |
| 2275 | |
| 2276 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 2277 | continue; |
| 2278 | |
| 2279 | /* Allocate memory for the section contents. We use bfd_zalloc |
| 2280 | here in case unused entries are not reclaimed before the |
| 2281 | section's contents are written out. This should not happen, |
| 2282 | but this way if it does, we get a R_LM32_NONE reloc instead |
| 2283 | of garbage. */ |
| 2284 | s->contents = bfd_zalloc (dynobj, s->size); |
| 2285 | if (s->contents == NULL) |
| 2286 | return FALSE; |
| 2287 | } |
| 2288 | |
| 2289 | if (htab->root.dynamic_sections_created) |
| 2290 | { |
| 2291 | /* Add some entries to the .dynamic section. We fill in the |
| 2292 | values later, in lm32_elf_finish_dynamic_sections, but we |
| 2293 | must add the entries now so that we get the correct size for |
| 2294 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 2295 | dynamic linker and used by the debugger. */ |
| 2296 | #define add_dynamic_entry(TAG, VAL) \ |
| 2297 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 2298 | |
| 2299 | if (info->executable) |
| 2300 | { |
| 2301 | if (! add_dynamic_entry (DT_DEBUG, 0)) |
| 2302 | return FALSE; |
| 2303 | } |
| 2304 | |
| 2305 | if (htab->splt->size != 0) |
| 2306 | { |
| 2307 | if (! add_dynamic_entry (DT_PLTGOT, 0) |
| 2308 | || ! add_dynamic_entry (DT_PLTRELSZ, 0) |
| 2309 | || ! add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 2310 | || ! add_dynamic_entry (DT_JMPREL, 0)) |
| 2311 | return FALSE; |
| 2312 | } |
| 2313 | |
| 2314 | if (relocs) |
| 2315 | { |
| 2316 | if (! add_dynamic_entry (DT_RELA, 0) |
| 2317 | || ! add_dynamic_entry (DT_RELASZ, 0) |
| 2318 | || ! add_dynamic_entry (DT_RELAENT, |
| 2319 | sizeof (Elf32_External_Rela))) |
| 2320 | return FALSE; |
| 2321 | |
| 2322 | /* If any dynamic relocs apply to a read-only section, |
| 2323 | then we need a DT_TEXTREL entry. */ |
| 2324 | if ((info->flags & DF_TEXTREL) == 0) |
| 2325 | elf_link_hash_traverse (&htab->root, readonly_dynrelocs, |
| 2326 | info); |
| 2327 | |
| 2328 | if ((info->flags & DF_TEXTREL) != 0) |
| 2329 | { |
| 2330 | if (! add_dynamic_entry (DT_TEXTREL, 0)) |
| 2331 | return FALSE; |
| 2332 | } |
| 2333 | } |
| 2334 | } |
| 2335 | #undef add_dynamic_entry |
| 2336 | |
| 2337 | /* Allocate .rofixup section. */ |
| 2338 | if (IS_FDPIC (output_bfd)) |
| 2339 | { |
| 2340 | struct weak_symbol_list *list_start = NULL, *list_end = NULL; |
| 2341 | int rgot_weak_count = 0; |
| 2342 | int r32_count = 0; |
| 2343 | int rgot_count = 0; |
| 2344 | /* Look for deleted sections. */ |
| 2345 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 2346 | { |
| 2347 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 2348 | { |
| 2349 | if (s->reloc_count) |
| 2350 | { |
| 2351 | /* Count relocs that need .rofixup entires. */ |
| 2352 | Elf_Internal_Rela *internal_relocs, *end; |
| 2353 | internal_relocs = elf_section_data (s)->relocs; |
| 2354 | if (internal_relocs == NULL) |
| 2355 | internal_relocs = (_bfd_elf_link_read_relocs (ibfd, s, NULL, NULL, FALSE)); |
| 2356 | if (internal_relocs != NULL) |
| 2357 | { |
| 2358 | end = internal_relocs + s->reloc_count; |
| 2359 | while (internal_relocs < end) |
| 2360 | { |
| 2361 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 2362 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); |
| 2363 | unsigned long r_symndx; |
| 2364 | struct elf_link_hash_entry *h; |
| 2365 | |
| 2366 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 2367 | sym_hashes = elf_sym_hashes (ibfd); |
| 2368 | r_symndx = ELF32_R_SYM (internal_relocs->r_info); |
| 2369 | h = NULL; |
| 2370 | if (r_symndx < symtab_hdr->sh_info) |
| 2371 | { |
| 2372 | } |
| 2373 | else |
| 2374 | { |
| 2375 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 2376 | while (h->root.type == bfd_link_hash_indirect |
| 2377 | || h->root.type == bfd_link_hash_warning) |
| 2378 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 2379 | } |
| 2380 | |
| 2381 | /* Don't generate entries for weak symbols. */ |
| 2382 | if (!h || (h && h->root.type != bfd_link_hash_undefweak)) |
| 2383 | { |
| 2384 | if (!elf_discarded_section (s) && !((bfd_get_section_flags (ibfd, s) & SEC_ALLOC) == 0)) |
| 2385 | { |
| 2386 | switch (ELF32_R_TYPE (internal_relocs->r_info)) |
| 2387 | { |
| 2388 | case R_LM32_32: |
| 2389 | r32_count++; |
| 2390 | break; |
| 2391 | case R_LM32_16_GOT: |
| 2392 | rgot_count++; |
| 2393 | break; |
| 2394 | } |
| 2395 | } |
| 2396 | } |
| 2397 | else |
| 2398 | { |
| 2399 | struct weak_symbol_list *current, *new_entry; |
| 2400 | /* Is this symbol already in the list? */ |
| 2401 | for (current = list_start; current; current = current->next) |
| 2402 | { |
| 2403 | if (!strcmp (current->name, h->root.root.string)) |
| 2404 | break; |
| 2405 | } |
| 2406 | if (!current && !elf_discarded_section (s) && (bfd_get_section_flags (ibfd, s) & SEC_ALLOC)) |
| 2407 | { |
| 2408 | /* Will this have an entry in the GOT. */ |
| 2409 | if (ELF32_R_TYPE (internal_relocs->r_info) == R_LM32_16_GOT) |
| 2410 | { |
| 2411 | /* Create a new entry. */ |
| 2412 | new_entry = malloc (sizeof (struct weak_symbol_list)); |
| 2413 | if (!new_entry) |
| 2414 | return FALSE; |
| 2415 | new_entry->name = h->root.root.string; |
| 2416 | new_entry->next = NULL; |
| 2417 | /* Add to list */ |
| 2418 | if (list_start == NULL) |
| 2419 | { |
| 2420 | list_start = new_entry; |
| 2421 | list_end = new_entry; |
| 2422 | } |
| 2423 | else |
| 2424 | { |
| 2425 | list_end->next = new_entry; |
| 2426 | list_end = new_entry; |
| 2427 | } |
| 2428 | /* Increase count of undefined weak symbols in the got. */ |
| 2429 | rgot_weak_count++; |
| 2430 | } |
| 2431 | } |
| 2432 | } |
| 2433 | internal_relocs++; |
| 2434 | } |
| 2435 | } |
| 2436 | else |
| 2437 | return FALSE; |
| 2438 | } |
| 2439 | } |
| 2440 | } |
| 2441 | /* Free list. */ |
| 2442 | while (list_start) |
| 2443 | { |
| 2444 | list_end = list_start->next; |
| 2445 | free (list_start); |
| 2446 | list_start = list_end; |
| 2447 | } |
| 2448 | |
| 2449 | /* Size sections. */ |
| 2450 | lm32fdpic_fixup32_section (info)->size = (r32_count + (htab->sgot->size / 4) - rgot_weak_count + 1) * 4; |
| 2451 | if (lm32fdpic_fixup32_section (info)->size == 0) |
| 2452 | lm32fdpic_fixup32_section (info)->flags |= SEC_EXCLUDE; |
| 2453 | else |
| 2454 | { |
| 2455 | lm32fdpic_fixup32_section (info)->contents = |
| 2456 | bfd_zalloc (dynobj, lm32fdpic_fixup32_section (info)->size); |
| 2457 | if (lm32fdpic_fixup32_section (info)->contents == NULL) |
| 2458 | return FALSE; |
| 2459 | } |
| 2460 | } |
| 2461 | |
| 2462 | return TRUE; |
| 2463 | } |
| 2464 | |
| 2465 | /* Create dynamic sections when linking against a dynamic object. */ |
| 2466 | |
| 2467 | static bfd_boolean |
| 2468 | lm32_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
| 2469 | { |
| 2470 | struct elf_lm32_link_hash_table *htab; |
| 2471 | flagword flags, pltflags; |
| 2472 | asection *s; |
| 2473 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 2474 | int ptralign = 2; /* 32bit */ |
| 2475 | |
| 2476 | htab = lm32_elf_hash_table (info); |
| 2477 | if (htab == NULL) |
| 2478 | return FALSE; |
| 2479 | |
| 2480 | /* Make sure we have a GOT - For the case where we have a dynamic object |
| 2481 | but none of the relocs in check_relocs */ |
| 2482 | if (! create_got_section (abfd, info)) |
| 2483 | return FALSE; |
| 2484 | if (IS_FDPIC (abfd) && (htab->sfixup32 == NULL)) |
| 2485 | { |
| 2486 | if (! create_rofixup_section (abfd, info)) |
| 2487 | return FALSE; |
| 2488 | } |
| 2489 | |
| 2490 | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and |
| 2491 | .rel[a].bss sections. */ |
| 2492 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 2493 | | SEC_LINKER_CREATED); |
| 2494 | |
| 2495 | pltflags = flags; |
| 2496 | pltflags |= SEC_CODE; |
| 2497 | if (bed->plt_not_loaded) |
| 2498 | pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); |
| 2499 | if (bed->plt_readonly) |
| 2500 | pltflags |= SEC_READONLY; |
| 2501 | |
| 2502 | s = bfd_make_section_with_flags (abfd, ".plt", pltflags); |
| 2503 | htab->splt = s; |
| 2504 | if (s == NULL |
| 2505 | || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) |
| 2506 | return FALSE; |
| 2507 | |
| 2508 | if (bed->want_plt_sym) |
| 2509 | { |
| 2510 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
| 2511 | .plt section. */ |
| 2512 | struct bfd_link_hash_entry *bh = NULL; |
| 2513 | struct elf_link_hash_entry *h; |
| 2514 | |
| 2515 | if (! (_bfd_generic_link_add_one_symbol |
| 2516 | (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, |
| 2517 | (bfd_vma) 0, NULL, FALSE, |
| 2518 | get_elf_backend_data (abfd)->collect, &bh))) |
| 2519 | return FALSE; |
| 2520 | h = (struct elf_link_hash_entry *) bh; |
| 2521 | h->def_regular = 1; |
| 2522 | h->type = STT_OBJECT; |
| 2523 | htab->root.hplt = h; |
| 2524 | |
| 2525 | if (info->shared |
| 2526 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 2527 | return FALSE; |
| 2528 | } |
| 2529 | |
| 2530 | s = bfd_make_section_with_flags (abfd, |
| 2531 | bed->default_use_rela_p ? ".rela.plt" : ".rel.plt", |
| 2532 | flags | SEC_READONLY); |
| 2533 | htab->srelplt = s; |
| 2534 | if (s == NULL |
| 2535 | || ! bfd_set_section_alignment (abfd, s, ptralign)) |
| 2536 | return FALSE; |
| 2537 | |
| 2538 | if (htab->sgot == NULL |
| 2539 | && ! create_got_section (abfd, info)) |
| 2540 | return FALSE; |
| 2541 | |
| 2542 | { |
| 2543 | const char *secname; |
| 2544 | char *relname; |
| 2545 | flagword secflags; |
| 2546 | asection *sec; |
| 2547 | |
| 2548 | for (sec = abfd->sections; sec; sec = sec->next) |
| 2549 | { |
| 2550 | secflags = bfd_get_section_flags (abfd, sec); |
| 2551 | if ((secflags & (SEC_DATA | SEC_LINKER_CREATED)) |
| 2552 | || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS)) |
| 2553 | continue; |
| 2554 | secname = bfd_get_section_name (abfd, sec); |
| 2555 | relname = bfd_malloc ((bfd_size_type) strlen (secname) + 6); |
| 2556 | strcpy (relname, ".rela"); |
| 2557 | strcat (relname, secname); |
| 2558 | if (bfd_get_section_by_name (abfd, secname)) |
| 2559 | continue; |
| 2560 | s = bfd_make_section_with_flags (abfd, relname, |
| 2561 | flags | SEC_READONLY); |
| 2562 | if (s == NULL |
| 2563 | || ! bfd_set_section_alignment (abfd, s, ptralign)) |
| 2564 | return FALSE; |
| 2565 | } |
| 2566 | } |
| 2567 | |
| 2568 | if (bed->want_dynbss) |
| 2569 | { |
| 2570 | /* The .dynbss section is a place to put symbols which are defined |
| 2571 | by dynamic objects, are referenced by regular objects, and are |
| 2572 | not functions. We must allocate space for them in the process |
| 2573 | image and use a R_*_COPY reloc to tell the dynamic linker to |
| 2574 | initialize them at run time. The linker script puts the .dynbss |
| 2575 | section into the .bss section of the final image. */ |
| 2576 | s = bfd_make_section_with_flags (abfd, ".dynbss", |
| 2577 | SEC_ALLOC | SEC_LINKER_CREATED); |
| 2578 | htab->sdynbss = s; |
| 2579 | if (s == NULL) |
| 2580 | return FALSE; |
| 2581 | /* The .rel[a].bss section holds copy relocs. This section is not |
| 2582 | normally needed. We need to create it here, though, so that the |
| 2583 | linker will map it to an output section. We can't just create it |
| 2584 | only if we need it, because we will not know whether we need it |
| 2585 | until we have seen all the input files, and the first time the |
| 2586 | main linker code calls BFD after examining all the input files |
| 2587 | (size_dynamic_sections) the input sections have already been |
| 2588 | mapped to the output sections. If the section turns out not to |
| 2589 | be needed, we can discard it later. We will never need this |
| 2590 | section when generating a shared object, since they do not use |
| 2591 | copy relocs. */ |
| 2592 | if (! info->shared) |
| 2593 | { |
| 2594 | s = bfd_make_section_with_flags (abfd, |
| 2595 | (bed->default_use_rela_p |
| 2596 | ? ".rela.bss" : ".rel.bss"), |
| 2597 | flags | SEC_READONLY); |
| 2598 | htab->srelbss = s; |
| 2599 | if (s == NULL |
| 2600 | || ! bfd_set_section_alignment (abfd, s, ptralign)) |
| 2601 | return FALSE; |
| 2602 | } |
| 2603 | } |
| 2604 | |
| 2605 | return TRUE; |
| 2606 | } |
| 2607 | |
| 2608 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 2609 | |
| 2610 | static void |
| 2611 | lm32_elf_copy_indirect_symbol (struct bfd_link_info *info, |
| 2612 | struct elf_link_hash_entry *dir, |
| 2613 | struct elf_link_hash_entry *ind) |
| 2614 | { |
| 2615 | struct elf_lm32_link_hash_entry * edir; |
| 2616 | struct elf_lm32_link_hash_entry * eind; |
| 2617 | |
| 2618 | edir = (struct elf_lm32_link_hash_entry *) dir; |
| 2619 | eind = (struct elf_lm32_link_hash_entry *) ind; |
| 2620 | |
| 2621 | if (eind->dyn_relocs != NULL) |
| 2622 | { |
| 2623 | if (edir->dyn_relocs != NULL) |
| 2624 | { |
| 2625 | struct elf_lm32_dyn_relocs **pp; |
| 2626 | struct elf_lm32_dyn_relocs *p; |
| 2627 | |
| 2628 | /* Add reloc counts against the indirect sym to the direct sym |
| 2629 | list. Merge any entries against the same section. */ |
| 2630 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) |
| 2631 | { |
| 2632 | struct elf_lm32_dyn_relocs *q; |
| 2633 | |
| 2634 | for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| 2635 | if (q->sec == p->sec) |
| 2636 | { |
| 2637 | q->pc_count += p->pc_count; |
| 2638 | q->count += p->count; |
| 2639 | *pp = p->next; |
| 2640 | break; |
| 2641 | } |
| 2642 | if (q == NULL) |
| 2643 | pp = &p->next; |
| 2644 | } |
| 2645 | *pp = edir->dyn_relocs; |
| 2646 | } |
| 2647 | |
| 2648 | edir->dyn_relocs = eind->dyn_relocs; |
| 2649 | eind->dyn_relocs = NULL; |
| 2650 | } |
| 2651 | |
| 2652 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| 2653 | } |
| 2654 | |
| 2655 | static bfd_boolean |
| 2656 | lm32_elf_always_size_sections (bfd *output_bfd, |
| 2657 | struct bfd_link_info *info) |
| 2658 | { |
| 2659 | if (!info->relocatable) |
| 2660 | { |
| 2661 | struct elf_link_hash_entry *h; |
| 2662 | |
| 2663 | /* Force a PT_GNU_STACK segment to be created. */ |
| 2664 | if (! elf_tdata (output_bfd)->stack_flags) |
| 2665 | elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X; |
| 2666 | |
| 2667 | /* Define __stacksize if it's not defined yet. */ |
| 2668 | h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize", |
| 2669 | FALSE, FALSE, FALSE); |
| 2670 | if (! h || h->root.type != bfd_link_hash_defined |
| 2671 | || h->type != STT_OBJECT |
| 2672 | || !h->def_regular) |
| 2673 | { |
| 2674 | struct bfd_link_hash_entry *bh = NULL; |
| 2675 | |
| 2676 | if (!(_bfd_generic_link_add_one_symbol |
| 2677 | (info, output_bfd, "__stacksize", |
| 2678 | BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE, |
| 2679 | (const char *) NULL, FALSE, |
| 2680 | get_elf_backend_data (output_bfd)->collect, &bh))) |
| 2681 | return FALSE; |
| 2682 | |
| 2683 | h = (struct elf_link_hash_entry *) bh; |
| 2684 | h->def_regular = 1; |
| 2685 | h->type = STT_OBJECT; |
| 2686 | /* This one must NOT be hidden. */ |
| 2687 | } |
| 2688 | } |
| 2689 | |
| 2690 | return TRUE; |
| 2691 | } |
| 2692 | |
| 2693 | static bfd_boolean |
| 2694 | lm32_elf_modify_segment_map (bfd *output_bfd, |
| 2695 | struct bfd_link_info *info) |
| 2696 | { |
| 2697 | struct elf_segment_map *m; |
| 2698 | |
| 2699 | /* objcopy and strip preserve what's already there using elf32_lm32fdpic_copy_ |
| 2700 | private_bfd_data (). */ |
| 2701 | if (! info) |
| 2702 | return TRUE; |
| 2703 | |
| 2704 | for (m = elf_tdata (output_bfd)->segment_map; m != NULL; m = m->next) |
| 2705 | if (m->p_type == PT_GNU_STACK) |
| 2706 | break; |
| 2707 | |
| 2708 | if (m) |
| 2709 | { |
| 2710 | asection *sec = bfd_get_section_by_name (output_bfd, ".stack"); |
| 2711 | struct elf_link_hash_entry *h; |
| 2712 | |
| 2713 | if (sec) |
| 2714 | { |
| 2715 | /* Obtain the pointer to the __stacksize symbol. */ |
| 2716 | h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize", |
| 2717 | FALSE, FALSE, FALSE); |
| 2718 | while (h->root.type == bfd_link_hash_indirect |
| 2719 | || h->root.type == bfd_link_hash_warning) |
| 2720 | h = (struct elf_link_hash_entry *)h->root.u.i.link; |
| 2721 | BFD_ASSERT (h->root.type == bfd_link_hash_defined); |
| 2722 | |
| 2723 | /* Set the section size from the symbol value. We |
| 2724 | intentionally ignore the symbol section. */ |
| 2725 | if (h->root.type == bfd_link_hash_defined) |
| 2726 | sec->size = h->root.u.def.value; |
| 2727 | else |
| 2728 | sec->size = DEFAULT_STACK_SIZE; |
| 2729 | |
| 2730 | /* Add the stack section to the PT_GNU_STACK segment, |
| 2731 | such that its size and alignment requirements make it |
| 2732 | to the segment. */ |
| 2733 | m->sections[m->count] = sec; |
| 2734 | m->count++; |
| 2735 | } |
| 2736 | } |
| 2737 | |
| 2738 | return TRUE; |
| 2739 | } |
| 2740 | |
| 2741 | static bfd_boolean |
| 2742 | lm32_elf_modify_program_headers (bfd *output_bfd, |
| 2743 | struct bfd_link_info *info) |
| 2744 | { |
| 2745 | struct elf_obj_tdata *tdata = elf_tdata (output_bfd); |
| 2746 | struct elf_segment_map *m; |
| 2747 | Elf_Internal_Phdr *p; |
| 2748 | |
| 2749 | if (! info) |
| 2750 | return TRUE; |
| 2751 | |
| 2752 | for (p = tdata->phdr, m = tdata->segment_map; m != NULL; m = m->next, p++) |
| 2753 | if (m->p_type == PT_GNU_STACK) |
| 2754 | break; |
| 2755 | |
| 2756 | if (m) |
| 2757 | { |
| 2758 | struct elf_link_hash_entry *h; |
| 2759 | |
| 2760 | /* Obtain the pointer to the __stacksize symbol. */ |
| 2761 | h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize", |
| 2762 | FALSE, FALSE, FALSE); |
| 2763 | if (h) |
| 2764 | { |
| 2765 | while (h->root.type == bfd_link_hash_indirect |
| 2766 | || h->root.type == bfd_link_hash_warning) |
| 2767 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 2768 | BFD_ASSERT (h->root.type == bfd_link_hash_defined); |
| 2769 | } |
| 2770 | |
| 2771 | /* Set the header p_memsz from the symbol value. We |
| 2772 | intentionally ignore the symbol section. */ |
| 2773 | if (h && h->root.type == bfd_link_hash_defined) |
| 2774 | p->p_memsz = h->root.u.def.value; |
| 2775 | else |
| 2776 | p->p_memsz = DEFAULT_STACK_SIZE; |
| 2777 | |
| 2778 | p->p_align = 8; |
| 2779 | } |
| 2780 | |
| 2781 | return TRUE; |
| 2782 | } |
| 2783 | |
| 2784 | |
| 2785 | static bfd_boolean |
| 2786 | lm32_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 2787 | { |
| 2788 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 2789 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 2790 | return TRUE; |
| 2791 | |
| 2792 | BFD_ASSERT (!elf_flags_init (obfd) |
| 2793 | || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); |
| 2794 | |
| 2795 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; |
| 2796 | elf_flags_init (obfd) = TRUE; |
| 2797 | |
| 2798 | /* Copy object attributes. */ |
| 2799 | _bfd_elf_copy_obj_attributes (ibfd, obfd); |
| 2800 | |
| 2801 | return TRUE; |
| 2802 | } |
| 2803 | |
| 2804 | |
| 2805 | static bfd_boolean |
| 2806 | lm32_elf_fdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 2807 | { |
| 2808 | unsigned i; |
| 2809 | |
| 2810 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 2811 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 2812 | return TRUE; |
| 2813 | |
| 2814 | if (! lm32_elf_copy_private_bfd_data (ibfd, obfd)) |
| 2815 | return FALSE; |
| 2816 | |
| 2817 | if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr |
| 2818 | || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr) |
| 2819 | return TRUE; |
| 2820 | |
| 2821 | /* Copy the stack size. */ |
| 2822 | for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++) |
| 2823 | if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK) |
| 2824 | { |
| 2825 | Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i]; |
| 2826 | |
| 2827 | for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++) |
| 2828 | if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK) |
| 2829 | { |
| 2830 | memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr)); |
| 2831 | |
| 2832 | /* Rewrite the phdrs, since we're only called after they were first written. */ |
| 2833 | if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd) |
| 2834 | ->s->sizeof_ehdr, SEEK_SET) != 0 |
| 2835 | || get_elf_backend_data (obfd)->s->write_out_phdrs (obfd, elf_tdata (obfd)->phdr, |
| 2836 | elf_elfheader (obfd)->e_phnum) != 0) |
| 2837 | return FALSE; |
| 2838 | break; |
| 2839 | } |
| 2840 | |
| 2841 | break; |
| 2842 | } |
| 2843 | |
| 2844 | return TRUE; |
| 2845 | } |
| 2846 | |
| 2847 | |
| 2848 | #define ELF_ARCH bfd_arch_lm32 |
| 2849 | #define ELF_TARGET_ID LM32_ELF_DATA |
| 2850 | #define ELF_MACHINE_CODE EM_LATTICEMICO32 |
| 2851 | #define ELF_MAXPAGESIZE 0x1000 |
| 2852 | |
| 2853 | #define TARGET_BIG_SYM bfd_elf32_lm32_vec |
| 2854 | #define TARGET_BIG_NAME "elf32-lm32" |
| 2855 | |
| 2856 | #define bfd_elf32_bfd_reloc_type_lookup lm32_reloc_type_lookup |
| 2857 | #define bfd_elf32_bfd_reloc_name_lookup lm32_reloc_name_lookup |
| 2858 | #define elf_info_to_howto lm32_info_to_howto_rela |
| 2859 | #define elf_info_to_howto_rel 0 |
| 2860 | #define elf_backend_rela_normal 1 |
| 2861 | #define elf_backend_object_p lm32_elf_object_p |
| 2862 | #define elf_backend_final_write_processing lm32_elf_final_write_processing |
| 2863 | #define elf_backend_can_gc_sections 1 |
| 2864 | #define elf_backend_can_refcount 1 |
| 2865 | #define elf_backend_gc_mark_hook lm32_elf_gc_mark_hook |
| 2866 | #define elf_backend_gc_sweep_hook lm32_elf_gc_sweep_hook |
| 2867 | #define elf_backend_plt_readonly 1 |
| 2868 | #define elf_backend_want_got_plt 1 |
| 2869 | #define elf_backend_want_plt_sym 0 |
| 2870 | #define elf_backend_got_header_size 12 |
| 2871 | #define bfd_elf32_bfd_link_hash_table_create lm32_elf_link_hash_table_create |
| 2872 | #define elf_backend_check_relocs lm32_elf_check_relocs |
| 2873 | #define elf_backend_reloc_type_class lm32_elf_reloc_type_class |
| 2874 | #define elf_backend_copy_indirect_symbol lm32_elf_copy_indirect_symbol |
| 2875 | #define elf_backend_size_dynamic_sections lm32_elf_size_dynamic_sections |
| 2876 | #define elf_backend_omit_section_dynsym ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) |
| 2877 | #define elf_backend_create_dynamic_sections lm32_elf_create_dynamic_sections |
| 2878 | #define elf_backend_finish_dynamic_sections lm32_elf_finish_dynamic_sections |
| 2879 | #define elf_backend_adjust_dynamic_symbol lm32_elf_adjust_dynamic_symbol |
| 2880 | #define elf_backend_finish_dynamic_symbol lm32_elf_finish_dynamic_symbol |
| 2881 | #define elf_backend_relocate_section lm32_elf_relocate_section |
| 2882 | |
| 2883 | #include "elf32-target.h" |
| 2884 | |
| 2885 | #undef ELF_MAXPAGESIZE |
| 2886 | #define ELF_MAXPAGESIZE 0x4000 |
| 2887 | |
| 2888 | |
| 2889 | #undef TARGET_BIG_SYM |
| 2890 | #define TARGET_BIG_SYM bfd_elf32_lm32fdpic_vec |
| 2891 | #undef TARGET_BIG_NAME |
| 2892 | #define TARGET_BIG_NAME "elf32-lm32fdpic" |
| 2893 | #undef elf32_bed |
| 2894 | #define elf32_bed elf32_lm32fdpic_bed |
| 2895 | |
| 2896 | #undef elf_backend_always_size_sections |
| 2897 | #define elf_backend_always_size_sections lm32_elf_always_size_sections |
| 2898 | #undef elf_backend_modify_segment_map |
| 2899 | #define elf_backend_modify_segment_map lm32_elf_modify_segment_map |
| 2900 | #undef elf_backend_modify_program_headers |
| 2901 | #define elf_backend_modify_program_headers lm32_elf_modify_program_headers |
| 2902 | #undef bfd_elf32_bfd_copy_private_bfd_data |
| 2903 | #define bfd_elf32_bfd_copy_private_bfd_data lm32_elf_fdpic_copy_private_bfd_data |
| 2904 | |
| 2905 | #include "elf32-target.h" |