| 1 | /* 32-bit ELF support for S+core. |
| 2 | Copyright (C) 2009-2020 Free Software Foundation, Inc. |
| 3 | Contributed by |
| 4 | Brain.lin (brain.lin@sunplusct.com) |
| 5 | Mei Ligang (ligang@sunnorth.com.cn) |
| 6 | Pei-Lin Tsai (pltsai@sunplus.com) |
| 7 | |
| 8 | This file is part of BFD, the Binary File Descriptor library. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program; if not, write to the Free Software |
| 22 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 23 | MA 02110-1301, USA. */ |
| 24 | |
| 25 | #include "sysdep.h" |
| 26 | #include "bfd.h" |
| 27 | #include "libbfd.h" |
| 28 | #include "libiberty.h" |
| 29 | #include "elf-bfd.h" |
| 30 | #include "elf/score.h" |
| 31 | #include "elf/common.h" |
| 32 | #include "elf/internal.h" |
| 33 | #include "hashtab.h" |
| 34 | #include "elf32-score.h" |
| 35 | |
| 36 | |
| 37 | /* The SCORE ELF linker needs additional information for each symbol in |
| 38 | the global hash table. */ |
| 39 | struct score_elf_link_hash_entry |
| 40 | { |
| 41 | struct elf_link_hash_entry root; |
| 42 | |
| 43 | /* Number of R_SCORE_ABS32, R_SCORE_REL32 relocs against this symbol. */ |
| 44 | unsigned int possibly_dynamic_relocs; |
| 45 | |
| 46 | /* If the R_SCORE_ABS32, R_SCORE_REL32 reloc is against a readonly section. */ |
| 47 | bfd_boolean readonly_reloc; |
| 48 | |
| 49 | /* We must not create a stub for a symbol that has relocations related to |
| 50 | taking the function's address, i.e. any but R_SCORE_CALL15 ones. */ |
| 51 | bfd_boolean no_fn_stub; |
| 52 | |
| 53 | /* Are we forced local? This will only be set if we have converted |
| 54 | the initial global GOT entry to a local GOT entry. */ |
| 55 | bfd_boolean forced_local; |
| 56 | }; |
| 57 | |
| 58 | /* Traverse a score ELF linker hash table. */ |
| 59 | #define score_elf_link_hash_traverse(table, func, info) \ |
| 60 | (elf_link_hash_traverse \ |
| 61 | ((table), \ |
| 62 | (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ |
| 63 | (info))) |
| 64 | |
| 65 | /* This structure is used to hold .got entries while estimating got sizes. */ |
| 66 | struct score_got_entry |
| 67 | { |
| 68 | /* The input bfd in which the symbol is defined. */ |
| 69 | bfd *abfd; |
| 70 | /* The index of the symbol, as stored in the relocation r_info, if |
| 71 | we have a local symbol; -1 otherwise. */ |
| 72 | long symndx; |
| 73 | union |
| 74 | { |
| 75 | /* If abfd == NULL, an address that must be stored in the got. */ |
| 76 | bfd_vma address; |
| 77 | /* If abfd != NULL && symndx != -1, the addend of the relocation |
| 78 | that should be added to the symbol value. */ |
| 79 | bfd_vma addend; |
| 80 | /* If abfd != NULL && symndx == -1, the hash table entry |
| 81 | corresponding to a global symbol in the got (or, local, if |
| 82 | h->forced_local). */ |
| 83 | struct score_elf_link_hash_entry *h; |
| 84 | } d; |
| 85 | |
| 86 | /* The offset from the beginning of the .got section to the entry |
| 87 | corresponding to this symbol+addend. If it's a global symbol |
| 88 | whose offset is yet to be decided, it's going to be -1. */ |
| 89 | long gotidx; |
| 90 | }; |
| 91 | |
| 92 | /* This structure is passed to score_elf_sort_hash_table_f when sorting |
| 93 | the dynamic symbols. */ |
| 94 | struct score_elf_hash_sort_data |
| 95 | { |
| 96 | /* The symbol in the global GOT with the lowest dynamic symbol table index. */ |
| 97 | struct elf_link_hash_entry *low; |
| 98 | /* The least dynamic symbol table index corresponding to a symbol with a GOT entry. */ |
| 99 | long min_got_dynindx; |
| 100 | /* The greatest dynamic symbol table index corresponding to a symbol |
| 101 | with a GOT entry that is not referenced (e.g., a dynamic symbol |
| 102 | with dynamic relocations pointing to it from non-primary GOTs). */ |
| 103 | long max_unref_got_dynindx; |
| 104 | /* The greatest dynamic symbol table index not corresponding to a |
| 105 | symbol without a GOT entry. */ |
| 106 | long max_non_got_dynindx; |
| 107 | }; |
| 108 | |
| 109 | struct score_got_info |
| 110 | { |
| 111 | /* The global symbol in the GOT with the lowest index in the dynamic |
| 112 | symbol table. */ |
| 113 | struct elf_link_hash_entry *global_gotsym; |
| 114 | /* The number of global .got entries. */ |
| 115 | unsigned int global_gotno; |
| 116 | /* The number of local .got entries. */ |
| 117 | unsigned int local_gotno; |
| 118 | /* The number of local .got entries we have used. */ |
| 119 | unsigned int assigned_gotno; |
| 120 | /* A hash table holding members of the got. */ |
| 121 | struct htab *got_entries; |
| 122 | /* In multi-got links, a pointer to the next got (err, rather, most |
| 123 | of the time, it points to the previous got). */ |
| 124 | struct score_got_info *next; |
| 125 | }; |
| 126 | |
| 127 | /* A structure used to count GOT entries, for GOT entry or ELF symbol table traversal. */ |
| 128 | struct _score_elf_section_data |
| 129 | { |
| 130 | struct bfd_elf_section_data elf; |
| 131 | union |
| 132 | { |
| 133 | struct score_got_info *got_info; |
| 134 | bfd_byte *tdata; |
| 135 | } |
| 136 | u; |
| 137 | }; |
| 138 | |
| 139 | #define score_elf_section_data(sec) \ |
| 140 | ((struct _score_elf_section_data *) elf_section_data (sec)) |
| 141 | |
| 142 | /* The size of a symbol-table entry. */ |
| 143 | #define SCORE_ELF_SYM_SIZE(abfd) \ |
| 144 | (get_elf_backend_data (abfd)->s->sizeof_sym) |
| 145 | |
| 146 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value |
| 147 | from smaller values. Start with zero, widen, *then* decrement. */ |
| 148 | #define MINUS_ONE (((bfd_vma)0) - 1) |
| 149 | #define MINUS_TWO (((bfd_vma)0) - 2) |
| 150 | |
| 151 | #define PDR_SIZE 32 |
| 152 | |
| 153 | |
| 154 | /* The number of local .got entries we reserve. */ |
| 155 | #define SCORE_RESERVED_GOTNO (2) |
| 156 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| 157 | |
| 158 | /* The offset of $gp from the beginning of the .got section. */ |
| 159 | #define ELF_SCORE_GP_OFFSET(abfd) (0x3ff0) |
| 160 | |
| 161 | /* The maximum size of the GOT for it to be addressable using 15-bit offsets from $gp. */ |
| 162 | #define SCORE_ELF_GOT_MAX_SIZE(abfd) (ELF_SCORE_GP_OFFSET(abfd) + 0x3fff) |
| 163 | |
| 164 | #define SCORE_ELF_STUB_SECTION_NAME (".SCORE.stub") |
| 165 | #define SCORE_FUNCTION_STUB_SIZE (16) |
| 166 | |
| 167 | #define STUB_LW 0xc3bcc010 /* lw r29, [r28, -0x3ff0] */ |
| 168 | #define STUB_MOVE 0x8323bc56 /* mv r25, r3 */ |
| 169 | #define STUB_LI16 0x87548000 /* ori r26, .dynsym_index */ |
| 170 | #define STUB_BRL 0x801dbc09 /* brl r29 */ |
| 171 | |
| 172 | #define SCORE_ELF_GOT_SIZE(abfd) \ |
| 173 | (get_elf_backend_data (abfd)->s->arch_size / 8) |
| 174 | |
| 175 | #define SCORE_ELF_ADD_DYNAMIC_ENTRY(info, tag, val) \ |
| 176 | (_bfd_elf_add_dynamic_entry (info, (bfd_vma) tag, (bfd_vma) val)) |
| 177 | |
| 178 | /* The size of an external dynamic table entry. */ |
| 179 | #define SCORE_ELF_DYN_SIZE(abfd) \ |
| 180 | (get_elf_backend_data (abfd)->s->sizeof_dyn) |
| 181 | |
| 182 | /* The size of an external REL relocation. */ |
| 183 | #define SCORE_ELF_REL_SIZE(abfd) \ |
| 184 | (get_elf_backend_data (abfd)->s->sizeof_rel) |
| 185 | |
| 186 | /* The default alignment for sections, as a power of two. */ |
| 187 | #define SCORE_ELF_LOG_FILE_ALIGN(abfd)\ |
| 188 | (get_elf_backend_data (abfd)->s->log_file_align) |
| 189 | |
| 190 | static bfd_byte *hi16_rel_addr; |
| 191 | |
| 192 | /* This will be used when we sort the dynamic relocation records. */ |
| 193 | static bfd *reldyn_sorting_bfd; |
| 194 | |
| 195 | /* SCORE ELF uses two common sections. One is the usual one, and the |
| 196 | other is for small objects. All the small objects are kept |
| 197 | together, and then referenced via the gp pointer, which yields |
| 198 | faster assembler code. This is what we use for the small common |
| 199 | section. This approach is copied from ecoff.c. */ |
| 200 | static asection score_elf_scom_section; |
| 201 | static asymbol score_elf_scom_symbol; |
| 202 | static asymbol * score_elf_scom_symbol_ptr; |
| 203 | |
| 204 | static bfd_reloc_status_type |
| 205 | score_elf_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 206 | arelent *reloc_entry, |
| 207 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 208 | void * data, |
| 209 | asection *input_section ATTRIBUTE_UNUSED, |
| 210 | bfd *output_bfd ATTRIBUTE_UNUSED, |
| 211 | char **error_message ATTRIBUTE_UNUSED) |
| 212 | { |
| 213 | hi16_rel_addr = (bfd_byte *) data + reloc_entry->address; |
| 214 | return bfd_reloc_ok; |
| 215 | } |
| 216 | |
| 217 | static bfd_reloc_status_type |
| 218 | score_elf_lo16_reloc (bfd *abfd, |
| 219 | arelent *reloc_entry, |
| 220 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 221 | void * data, |
| 222 | asection *input_section, |
| 223 | bfd *output_bfd ATTRIBUTE_UNUSED, |
| 224 | char **error_message ATTRIBUTE_UNUSED) |
| 225 | { |
| 226 | bfd_vma addend = 0, offset = 0; |
| 227 | unsigned long val; |
| 228 | unsigned long hi16_offset, hi16_value, uvalue; |
| 229 | |
| 230 | hi16_value = bfd_get_32 (abfd, hi16_rel_addr); |
| 231 | hi16_offset = ((((hi16_value >> 16) & 0x3) << 15) | (hi16_value & 0x7fff)) >> 1; |
| 232 | addend = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 233 | offset = ((((addend >> 16) & 0x3) << 15) | (addend & 0x7fff)) >> 1; |
| 234 | val = reloc_entry->addend; |
| 235 | if (reloc_entry->address > input_section->size) |
| 236 | return bfd_reloc_outofrange; |
| 237 | uvalue = ((hi16_offset << 16) | (offset & 0xffff)) + val; |
| 238 | hi16_offset = (uvalue >> 16) << 1; |
| 239 | hi16_value = (hi16_value & ~0x37fff) | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000); |
| 240 | bfd_put_32 (abfd, hi16_value, hi16_rel_addr); |
| 241 | offset = (uvalue & 0xffff) << 1; |
| 242 | addend = (addend & ~0x37fff) | (offset & 0x7fff) | ((offset << 1) & 0x30000); |
| 243 | bfd_put_32 (abfd, addend, (bfd_byte *) data + reloc_entry->address); |
| 244 | return bfd_reloc_ok; |
| 245 | } |
| 246 | |
| 247 | /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a |
| 248 | dangerous relocation. */ |
| 249 | |
| 250 | static bfd_boolean |
| 251 | score_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp) |
| 252 | { |
| 253 | unsigned int count; |
| 254 | asymbol **sym; |
| 255 | unsigned int i; |
| 256 | |
| 257 | /* If we've already figured out what GP will be, just return it. */ |
| 258 | *pgp = _bfd_get_gp_value (output_bfd); |
| 259 | if (*pgp) |
| 260 | return TRUE; |
| 261 | |
| 262 | count = bfd_get_symcount (output_bfd); |
| 263 | sym = bfd_get_outsymbols (output_bfd); |
| 264 | |
| 265 | /* The linker script will have created a symbol named `_gp' with the |
| 266 | appropriate value. */ |
| 267 | if (sym == NULL) |
| 268 | i = count; |
| 269 | else |
| 270 | { |
| 271 | for (i = 0; i < count; i++, sym++) |
| 272 | { |
| 273 | const char *name; |
| 274 | |
| 275 | name = bfd_asymbol_name (*sym); |
| 276 | if (*name == '_' && strcmp (name, "_gp") == 0) |
| 277 | { |
| 278 | *pgp = bfd_asymbol_value (*sym); |
| 279 | _bfd_set_gp_value (output_bfd, *pgp); |
| 280 | break; |
| 281 | } |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | if (i >= count) |
| 286 | { |
| 287 | /* Only get the error once. */ |
| 288 | *pgp = 4; |
| 289 | _bfd_set_gp_value (output_bfd, *pgp); |
| 290 | return FALSE; |
| 291 | } |
| 292 | |
| 293 | return TRUE; |
| 294 | } |
| 295 | |
| 296 | /* We have to figure out the gp value, so that we can adjust the |
| 297 | symbol value correctly. We look up the symbol _gp in the output |
| 298 | BFD. If we can't find it, we're stuck. We cache it in the ELF |
| 299 | target data. We don't need to adjust the symbol value for an |
| 300 | external symbol if we are producing relocatable output. */ |
| 301 | |
| 302 | static bfd_reloc_status_type |
| 303 | score_elf_final_gp (bfd *output_bfd, |
| 304 | asymbol *symbol, |
| 305 | bfd_boolean relocatable, |
| 306 | char **error_message, |
| 307 | bfd_vma *pgp) |
| 308 | { |
| 309 | if (bfd_is_und_section (symbol->section) |
| 310 | && ! relocatable) |
| 311 | { |
| 312 | *pgp = 0; |
| 313 | return bfd_reloc_undefined; |
| 314 | } |
| 315 | |
| 316 | *pgp = _bfd_get_gp_value (output_bfd); |
| 317 | if (*pgp == 0 |
| 318 | && (! relocatable |
| 319 | || (symbol->flags & BSF_SECTION_SYM) != 0)) |
| 320 | { |
| 321 | if (relocatable) |
| 322 | { |
| 323 | /* Make up a value. */ |
| 324 | *pgp = symbol->section->output_section->vma + 0x4000; |
| 325 | _bfd_set_gp_value (output_bfd, *pgp); |
| 326 | } |
| 327 | else if (!score_elf_assign_gp (output_bfd, pgp)) |
| 328 | { |
| 329 | *error_message = |
| 330 | (char *) _("GP relative relocation when _gp not defined"); |
| 331 | return bfd_reloc_dangerous; |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | return bfd_reloc_ok; |
| 336 | } |
| 337 | |
| 338 | static bfd_reloc_status_type |
| 339 | score_elf_gprel15_with_gp (bfd *abfd, |
| 340 | asymbol *symbol, |
| 341 | arelent *reloc_entry, |
| 342 | asection *input_section, |
| 343 | bfd_boolean relocateable, |
| 344 | void * data, |
| 345 | bfd_vma gp ATTRIBUTE_UNUSED) |
| 346 | { |
| 347 | bfd_vma relocation; |
| 348 | unsigned long insn; |
| 349 | |
| 350 | if (bfd_is_com_section (symbol->section)) |
| 351 | relocation = 0; |
| 352 | else |
| 353 | relocation = symbol->value; |
| 354 | |
| 355 | relocation += symbol->section->output_section->vma; |
| 356 | relocation += symbol->section->output_offset; |
| 357 | if (reloc_entry->address > input_section->size) |
| 358 | return bfd_reloc_outofrange; |
| 359 | |
| 360 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 361 | if (((reloc_entry->addend & 0xffffc000) != 0) |
| 362 | && ((reloc_entry->addend & 0xffffc000) != 0xffffc000)) |
| 363 | return bfd_reloc_overflow; |
| 364 | |
| 365 | insn = (insn & ~0x7fff) | (reloc_entry->addend & 0x7fff); |
| 366 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); |
| 367 | if (relocateable) |
| 368 | reloc_entry->address += input_section->output_offset; |
| 369 | |
| 370 | return bfd_reloc_ok; |
| 371 | } |
| 372 | |
| 373 | static bfd_reloc_status_type |
| 374 | gprel32_with_gp (bfd *abfd, asymbol *symbol, arelent *reloc_entry, |
| 375 | asection *input_section, bfd_boolean relocatable, |
| 376 | void *data, bfd_vma gp) |
| 377 | { |
| 378 | bfd_vma relocation; |
| 379 | bfd_vma val; |
| 380 | |
| 381 | if (bfd_is_com_section (symbol->section)) |
| 382 | relocation = 0; |
| 383 | else |
| 384 | relocation = symbol->value; |
| 385 | |
| 386 | relocation += symbol->section->output_section->vma; |
| 387 | relocation += symbol->section->output_offset; |
| 388 | |
| 389 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 390 | return bfd_reloc_outofrange; |
| 391 | |
| 392 | /* Set val to the offset into the section or symbol. */ |
| 393 | val = reloc_entry->addend; |
| 394 | |
| 395 | if (reloc_entry->howto->partial_inplace) |
| 396 | val += bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 397 | |
| 398 | /* Adjust val for the final section location and GP value. If we |
| 399 | are producing relocatable output, we don't want to do this for |
| 400 | an external symbol. */ |
| 401 | if (! relocatable |
| 402 | || (symbol->flags & BSF_SECTION_SYM) != 0) |
| 403 | val += relocation - gp; |
| 404 | |
| 405 | if (reloc_entry->howto->partial_inplace) |
| 406 | bfd_put_32 (abfd, val, (bfd_byte *) data + reloc_entry->address); |
| 407 | else |
| 408 | reloc_entry->addend = val; |
| 409 | |
| 410 | if (relocatable) |
| 411 | reloc_entry->address += input_section->output_offset; |
| 412 | |
| 413 | return bfd_reloc_ok; |
| 414 | } |
| 415 | |
| 416 | static bfd_reloc_status_type |
| 417 | score_elf_gprel15_reloc (bfd *abfd, |
| 418 | arelent *reloc_entry, |
| 419 | asymbol *symbol, |
| 420 | void * data, |
| 421 | asection *input_section, |
| 422 | bfd *output_bfd, |
| 423 | char **error_message) |
| 424 | { |
| 425 | bfd_boolean relocateable; |
| 426 | bfd_reloc_status_type ret; |
| 427 | bfd_vma gp; |
| 428 | |
| 429 | if (output_bfd != NULL |
| 430 | && (symbol->flags & BSF_SECTION_SYM) == 0 && reloc_entry->addend == 0) |
| 431 | { |
| 432 | reloc_entry->address += input_section->output_offset; |
| 433 | return bfd_reloc_ok; |
| 434 | } |
| 435 | if (output_bfd != NULL) |
| 436 | relocateable = TRUE; |
| 437 | else |
| 438 | { |
| 439 | relocateable = FALSE; |
| 440 | output_bfd = symbol->section->output_section->owner; |
| 441 | } |
| 442 | |
| 443 | ret = score_elf_final_gp (output_bfd, symbol, relocateable, error_message, &gp); |
| 444 | if (ret != bfd_reloc_ok) |
| 445 | return ret; |
| 446 | |
| 447 | return score_elf_gprel15_with_gp (abfd, symbol, reloc_entry, |
| 448 | input_section, relocateable, data, gp); |
| 449 | } |
| 450 | |
| 451 | /* Do a R_SCORE_GPREL32 relocation. This is a 32 bit value which must |
| 452 | become the offset from the gp register. */ |
| 453 | |
| 454 | static bfd_reloc_status_type |
| 455 | score_elf_gprel32_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 456 | void *data, asection *input_section, bfd *output_bfd, |
| 457 | char **error_message) |
| 458 | { |
| 459 | bfd_boolean relocatable; |
| 460 | bfd_reloc_status_type ret; |
| 461 | bfd_vma gp; |
| 462 | |
| 463 | /* R_SCORE_GPREL32 relocations are defined for local symbols only. */ |
| 464 | if (output_bfd != NULL |
| 465 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 466 | && (symbol->flags & BSF_LOCAL) != 0) |
| 467 | { |
| 468 | *error_message = (char *) |
| 469 | _("32bits gp relative relocation occurs for an external symbol"); |
| 470 | return bfd_reloc_outofrange; |
| 471 | } |
| 472 | |
| 473 | if (output_bfd != NULL) |
| 474 | relocatable = TRUE; |
| 475 | else |
| 476 | { |
| 477 | relocatable = FALSE; |
| 478 | output_bfd = symbol->section->output_section->owner; |
| 479 | } |
| 480 | |
| 481 | ret = score_elf_final_gp (output_bfd, symbol, relocatable, error_message, &gp); |
| 482 | if (ret != bfd_reloc_ok) |
| 483 | return ret; |
| 484 | |
| 485 | gp = 0; |
| 486 | return gprel32_with_gp (abfd, symbol, reloc_entry, input_section, |
| 487 | relocatable, data, gp); |
| 488 | } |
| 489 | |
| 490 | /* A howto special_function for R_SCORE_GOT15 relocations. This is just |
| 491 | like any other 16-bit relocation when applied to global symbols, but is |
| 492 | treated in the same as R_SCORE_HI16 when applied to local symbols. */ |
| 493 | |
| 494 | static bfd_reloc_status_type |
| 495 | score_elf_got15_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 496 | void *data, asection *input_section, |
| 497 | bfd *output_bfd, char **error_message) |
| 498 | { |
| 499 | if ((symbol->flags & (BSF_GLOBAL | BSF_WEAK)) != 0 |
| 500 | || bfd_is_und_section (bfd_asymbol_section (symbol)) |
| 501 | || bfd_is_com_section (bfd_asymbol_section (symbol))) |
| 502 | /* The relocation is against a global symbol. */ |
| 503 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 504 | input_section, output_bfd, |
| 505 | error_message); |
| 506 | |
| 507 | return score_elf_hi16_reloc (abfd, reloc_entry, symbol, data, |
| 508 | input_section, output_bfd, error_message); |
| 509 | } |
| 510 | |
| 511 | static bfd_reloc_status_type |
| 512 | score_elf_got_lo16_reloc (bfd *abfd, |
| 513 | arelent *reloc_entry, |
| 514 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 515 | void * data, |
| 516 | asection *input_section, |
| 517 | bfd *output_bfd ATTRIBUTE_UNUSED, |
| 518 | char **error_message ATTRIBUTE_UNUSED) |
| 519 | { |
| 520 | bfd_vma addend = 0, offset = 0; |
| 521 | signed long val; |
| 522 | signed long hi16_offset, hi16_value, uvalue; |
| 523 | |
| 524 | hi16_value = bfd_get_32 (abfd, hi16_rel_addr); |
| 525 | hi16_offset = ((((hi16_value >> 16) & 0x3) << 15) | (hi16_value & 0x7fff)) >> 1; |
| 526 | addend = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 527 | offset = ((((addend >> 16) & 0x3) << 15) | (addend & 0x7fff)) >> 1; |
| 528 | val = reloc_entry->addend; |
| 529 | if (reloc_entry->address > input_section->size) |
| 530 | return bfd_reloc_outofrange; |
| 531 | uvalue = ((hi16_offset << 16) | (offset & 0xffff)) + val; |
| 532 | if ((uvalue > -0x8000) && (uvalue < 0x7fff)) |
| 533 | hi16_offset = 0; |
| 534 | else |
| 535 | hi16_offset = (uvalue >> 16) & 0x7fff; |
| 536 | hi16_value = (hi16_value & ~0x37fff) | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000); |
| 537 | bfd_put_32 (abfd, hi16_value, hi16_rel_addr); |
| 538 | offset = (uvalue & 0xffff) << 1; |
| 539 | addend = (addend & ~0x37fff) | (offset & 0x7fff) | ((offset << 1) & 0x30000); |
| 540 | bfd_put_32 (abfd, addend, (bfd_byte *) data + reloc_entry->address); |
| 541 | return bfd_reloc_ok; |
| 542 | } |
| 543 | |
| 544 | static reloc_howto_type elf32_score_howto_table[] = |
| 545 | { |
| 546 | /* No relocation. */ |
| 547 | HOWTO (R_SCORE_NONE, /* type */ |
| 548 | 0, /* rightshift */ |
| 549 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 550 | 0, /* bitsize */ |
| 551 | FALSE, /* pc_relative */ |
| 552 | 0, /* bitpos */ |
| 553 | complain_overflow_dont,/* complain_on_overflow */ |
| 554 | bfd_elf_generic_reloc, /* special_function */ |
| 555 | "R_SCORE_NONE", /* name */ |
| 556 | FALSE, /* partial_inplace */ |
| 557 | 0, /* src_mask */ |
| 558 | 0, /* dst_mask */ |
| 559 | FALSE), /* pcrel_offset */ |
| 560 | |
| 561 | /* R_SCORE_HI16 */ |
| 562 | HOWTO (R_SCORE_HI16, /* type */ |
| 563 | 0, /* rightshift */ |
| 564 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 565 | 16, /* bitsize */ |
| 566 | FALSE, /* pc_relative */ |
| 567 | 1, /* bitpos */ |
| 568 | complain_overflow_dont,/* complain_on_overflow */ |
| 569 | score_elf_hi16_reloc, /* special_function */ |
| 570 | "R_SCORE_HI16", /* name */ |
| 571 | TRUE, /* partial_inplace */ |
| 572 | 0x37fff, /* src_mask */ |
| 573 | 0x37fff, /* dst_mask */ |
| 574 | FALSE), /* pcrel_offset */ |
| 575 | |
| 576 | /* R_SCORE_LO16 */ |
| 577 | HOWTO (R_SCORE_LO16, /* type */ |
| 578 | 0, /* rightshift */ |
| 579 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 580 | 16, /* bitsize */ |
| 581 | FALSE, /* pc_relative */ |
| 582 | 1, /* bitpos */ |
| 583 | complain_overflow_dont,/* complain_on_overflow */ |
| 584 | score_elf_lo16_reloc, /* special_function */ |
| 585 | "R_SCORE_LO16", /* name */ |
| 586 | TRUE, /* partial_inplace */ |
| 587 | 0x37fff, /* src_mask */ |
| 588 | 0x37fff, /* dst_mask */ |
| 589 | FALSE), /* pcrel_offset */ |
| 590 | |
| 591 | /* R_SCORE_BCMP */ |
| 592 | HOWTO (R_SCORE_BCMP, /* type */ |
| 593 | 0, /* rightshift */ |
| 594 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 595 | 16, /* bitsize */ |
| 596 | FALSE, /* pc_relative */ |
| 597 | 1, /* bitpos */ |
| 598 | complain_overflow_dont,/* complain_on_overflow */ |
| 599 | bfd_elf_generic_reloc, /* special_function */ |
| 600 | "R_SCORE_BCMP", /* name */ |
| 601 | TRUE, /* partial_inplace */ |
| 602 | 0x0000ffff, /* src_mask */ |
| 603 | 0x0000ffff, /* dst_mask */ |
| 604 | FALSE), /* pcrel_offset */ |
| 605 | |
| 606 | HOWTO (R_SCORE_24, /* type */ |
| 607 | 1, /* rightshift */ |
| 608 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 609 | 24, /* bitsize */ |
| 610 | FALSE, /* pc_relative */ |
| 611 | 1, /* bitpos */ |
| 612 | complain_overflow_dont,/* complain_on_overflow */ |
| 613 | bfd_elf_generic_reloc, /* special_function */ |
| 614 | "R_SCORE_24", /* name */ |
| 615 | FALSE, /* partial_inplace */ |
| 616 | 0x3ff7fff, /* src_mask */ |
| 617 | 0x3ff7fff, /* dst_mask */ |
| 618 | FALSE), /* pcrel_offset */ |
| 619 | |
| 620 | /*R_SCORE_PC19 */ |
| 621 | HOWTO (R_SCORE_PC19, /* type */ |
| 622 | 1, /* rightshift */ |
| 623 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 624 | 19, /* bitsize */ |
| 625 | TRUE, /* pc_relative */ |
| 626 | 1, /* bitpos */ |
| 627 | complain_overflow_dont,/* complain_on_overflow */ |
| 628 | bfd_elf_generic_reloc, /* special_function */ |
| 629 | "R_SCORE_PC19", /* name */ |
| 630 | FALSE, /* partial_inplace */ |
| 631 | 0x3ff03fe, /* src_mask */ |
| 632 | 0x3ff03fe, /* dst_mask */ |
| 633 | FALSE), /* pcrel_offset */ |
| 634 | |
| 635 | /*R_SCORE16_11 */ |
| 636 | HOWTO (R_SCORE16_11, /* type */ |
| 637 | 1, /* rightshift */ |
| 638 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 639 | 11, /* bitsize */ |
| 640 | FALSE, /* pc_relative */ |
| 641 | 1, /* bitpos */ |
| 642 | complain_overflow_dont,/* complain_on_overflow */ |
| 643 | bfd_elf_generic_reloc, /* special_function */ |
| 644 | "R_SCORE16_11", /* name */ |
| 645 | FALSE, /* partial_inplace */ |
| 646 | 0x000000ffe, /* src_mask */ |
| 647 | 0x000000ffe, /* dst_mask */ |
| 648 | FALSE), /* pcrel_offset */ |
| 649 | |
| 650 | /* R_SCORE16_PC8 */ |
| 651 | HOWTO (R_SCORE16_PC8, /* type */ |
| 652 | 1, /* rightshift */ |
| 653 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 654 | 8, /* bitsize */ |
| 655 | TRUE, /* pc_relative */ |
| 656 | 0, /* bitpos */ |
| 657 | complain_overflow_dont,/* complain_on_overflow */ |
| 658 | bfd_elf_generic_reloc, /* special_function */ |
| 659 | "R_SCORE16_PC8", /* name */ |
| 660 | FALSE, /* partial_inplace */ |
| 661 | 0x000000ff, /* src_mask */ |
| 662 | 0x000000ff, /* dst_mask */ |
| 663 | FALSE), /* pcrel_offset */ |
| 664 | |
| 665 | /* 32 bit absolute */ |
| 666 | HOWTO (R_SCORE_ABS32, /* type 8 */ |
| 667 | 0, /* rightshift */ |
| 668 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 669 | 32, /* bitsize */ |
| 670 | FALSE, /* pc_relative */ |
| 671 | 0, /* bitpos */ |
| 672 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 673 | bfd_elf_generic_reloc, /* special_function */ |
| 674 | "R_SCORE_ABS32", /* name */ |
| 675 | FALSE, /* partial_inplace */ |
| 676 | 0xffffffff, /* src_mask */ |
| 677 | 0xffffffff, /* dst_mask */ |
| 678 | FALSE), /* pcrel_offset */ |
| 679 | |
| 680 | /* 16 bit absolute */ |
| 681 | HOWTO (R_SCORE_ABS16, /* type 11 */ |
| 682 | 0, /* rightshift */ |
| 683 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 684 | 16, /* bitsize */ |
| 685 | FALSE, /* pc_relative */ |
| 686 | 0, /* bitpos */ |
| 687 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 688 | bfd_elf_generic_reloc, /* special_function */ |
| 689 | "R_SCORE_ABS16", /* name */ |
| 690 | FALSE, /* partial_inplace */ |
| 691 | 0x0000ffff, /* src_mask */ |
| 692 | 0x0000ffff, /* dst_mask */ |
| 693 | FALSE), /* pcrel_offset */ |
| 694 | |
| 695 | /* R_SCORE_DUMMY2 */ |
| 696 | HOWTO (R_SCORE_DUMMY2, /* type */ |
| 697 | 0, /* rightshift */ |
| 698 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 699 | 16, /* bitsize */ |
| 700 | FALSE, /* pc_relative */ |
| 701 | 0, /* bitpos */ |
| 702 | complain_overflow_dont,/* complain_on_overflow */ |
| 703 | bfd_elf_generic_reloc, /* special_function */ |
| 704 | "R_SCORE_DUMMY2", /* name */ |
| 705 | TRUE, /* partial_inplace */ |
| 706 | 0x00007fff, /* src_mask */ |
| 707 | 0x00007fff, /* dst_mask */ |
| 708 | FALSE), /* pcrel_offset */ |
| 709 | |
| 710 | /* R_SCORE_GP15 */ |
| 711 | HOWTO (R_SCORE_GP15, /* type */ |
| 712 | 0, /* rightshift */ |
| 713 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 714 | 16, /* bitsize */ |
| 715 | FALSE, /* pc_relative */ |
| 716 | 0, /* bitpos */ |
| 717 | complain_overflow_dont,/* complain_on_overflow */ |
| 718 | score_elf_gprel15_reloc,/* special_function */ |
| 719 | "R_SCORE_GP15", /* name */ |
| 720 | TRUE, /* partial_inplace */ |
| 721 | 0x00007fff, /* src_mask */ |
| 722 | 0x00007fff, /* dst_mask */ |
| 723 | FALSE), /* pcrel_offset */ |
| 724 | |
| 725 | /* GNU extension to record C++ vtable hierarchy. */ |
| 726 | HOWTO (R_SCORE_GNU_VTINHERIT, /* type */ |
| 727 | 0, /* rightshift */ |
| 728 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 729 | 0, /* bitsize */ |
| 730 | FALSE, /* pc_relative */ |
| 731 | 0, /* bitpos */ |
| 732 | complain_overflow_dont,/* complain_on_overflow */ |
| 733 | NULL, /* special_function */ |
| 734 | "R_SCORE_GNU_VTINHERIT", /* name */ |
| 735 | FALSE, /* partial_inplace */ |
| 736 | 0, /* src_mask */ |
| 737 | 0, /* dst_mask */ |
| 738 | FALSE), /* pcrel_offset */ |
| 739 | |
| 740 | /* GNU extension to record C++ vtable member usage */ |
| 741 | HOWTO (R_SCORE_GNU_VTENTRY, /* type */ |
| 742 | 0, /* rightshift */ |
| 743 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 744 | 0, /* bitsize */ |
| 745 | FALSE, /* pc_relative */ |
| 746 | 0, /* bitpos */ |
| 747 | complain_overflow_dont,/* complain_on_overflow */ |
| 748 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| 749 | "R_SCORE_GNU_VTENTRY", /* name */ |
| 750 | FALSE, /* partial_inplace */ |
| 751 | 0, /* src_mask */ |
| 752 | 0, /* dst_mask */ |
| 753 | FALSE), /* pcrel_offset */ |
| 754 | |
| 755 | /* Reference to global offset table. */ |
| 756 | HOWTO (R_SCORE_GOT15, /* type */ |
| 757 | 0, /* rightshift */ |
| 758 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 759 | 16, /* bitsize */ |
| 760 | FALSE, /* pc_relative */ |
| 761 | 0, /* bitpos */ |
| 762 | complain_overflow_signed, /* complain_on_overflow */ |
| 763 | score_elf_got15_reloc, /* special_function */ |
| 764 | "R_SCORE_GOT15", /* name */ |
| 765 | TRUE, /* partial_inplace */ |
| 766 | 0x00007fff, /* src_mask */ |
| 767 | 0x00007fff, /* dst_mask */ |
| 768 | FALSE), /* pcrel_offset */ |
| 769 | |
| 770 | /* Low 16 bits of displacement in global offset table. */ |
| 771 | HOWTO (R_SCORE_GOT_LO16, /* type */ |
| 772 | 0, /* rightshift */ |
| 773 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 774 | 16, /* bitsize */ |
| 775 | FALSE, /* pc_relative */ |
| 776 | 1, /* bitpos */ |
| 777 | complain_overflow_dont,/* complain_on_overflow */ |
| 778 | score_elf_got_lo16_reloc, /* special_function */ |
| 779 | "R_SCORE_GOT_LO16", /* name */ |
| 780 | TRUE, /* partial_inplace */ |
| 781 | 0x37ffe, /* src_mask */ |
| 782 | 0x37ffe, /* dst_mask */ |
| 783 | FALSE), /* pcrel_offset */ |
| 784 | |
| 785 | /* 15 bit call through global offset table. */ |
| 786 | HOWTO (R_SCORE_CALL15, /* type */ |
| 787 | 0, /* rightshift */ |
| 788 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 789 | 16, /* bitsize */ |
| 790 | FALSE, /* pc_relative */ |
| 791 | 0, /* bitpos */ |
| 792 | complain_overflow_signed, /* complain_on_overflow */ |
| 793 | bfd_elf_generic_reloc, /* special_function */ |
| 794 | "R_SCORE_CALL15", /* name */ |
| 795 | TRUE, /* partial_inplace */ |
| 796 | 0x00007fff, /* src_mask */ |
| 797 | 0x00007fff, /* dst_mask */ |
| 798 | FALSE), /* pcrel_offset */ |
| 799 | |
| 800 | /* 32 bit GP relative reference. */ |
| 801 | HOWTO (R_SCORE_GPREL32, /* type */ |
| 802 | 0, /* rightshift */ |
| 803 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 804 | 32, /* bitsize */ |
| 805 | FALSE, /* pc_relative */ |
| 806 | 0, /* bitpos */ |
| 807 | complain_overflow_dont,/* complain_on_overflow */ |
| 808 | score_elf_gprel32_reloc, /* special_function */ |
| 809 | "R_SCORE_GPREL32", /* name */ |
| 810 | TRUE, /* partial_inplace */ |
| 811 | 0xffffffff, /* src_mask */ |
| 812 | 0xffffffff, /* dst_mask */ |
| 813 | FALSE), /* pcrel_offset */ |
| 814 | |
| 815 | /* 32 bit symbol relative relocation. */ |
| 816 | HOWTO (R_SCORE_REL32, /* type */ |
| 817 | 0, /* rightshift */ |
| 818 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 819 | 32, /* bitsize */ |
| 820 | FALSE, /* pc_relative */ |
| 821 | 0, /* bitpos */ |
| 822 | complain_overflow_dont,/* complain_on_overflow */ |
| 823 | bfd_elf_generic_reloc, /* special_function */ |
| 824 | "R_SCORE_REL32", /* name */ |
| 825 | TRUE, /* partial_inplace */ |
| 826 | 0xffffffff, /* src_mask */ |
| 827 | 0xffffffff, /* dst_mask */ |
| 828 | FALSE), /* pcrel_offset */ |
| 829 | |
| 830 | /* R_SCORE_DUMMY_HI16 */ |
| 831 | HOWTO (R_SCORE_DUMMY_HI16, /* type */ |
| 832 | 0, /* rightshift */ |
| 833 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 834 | 16, /* bitsize */ |
| 835 | FALSE, /* pc_relative */ |
| 836 | 1, /* bitpos */ |
| 837 | complain_overflow_dont,/* complain_on_overflow */ |
| 838 | score_elf_hi16_reloc, /* special_function */ |
| 839 | "R_SCORE_DUMMY_HI16", /* name */ |
| 840 | TRUE, /* partial_inplace */ |
| 841 | 0x37fff, /* src_mask */ |
| 842 | 0x37fff, /* dst_mask */ |
| 843 | FALSE), /* pcrel_offset */ |
| 844 | }; |
| 845 | |
| 846 | struct score_reloc_map |
| 847 | { |
| 848 | bfd_reloc_code_real_type bfd_reloc_val; |
| 849 | unsigned char elf_reloc_val; |
| 850 | }; |
| 851 | |
| 852 | static const struct score_reloc_map elf32_score_reloc_map[] = |
| 853 | { |
| 854 | {BFD_RELOC_NONE, R_SCORE_NONE}, |
| 855 | {BFD_RELOC_HI16_S, R_SCORE_HI16}, |
| 856 | {BFD_RELOC_LO16, R_SCORE_LO16}, |
| 857 | {BFD_RELOC_SCORE_BCMP, R_SCORE_BCMP}, |
| 858 | {BFD_RELOC_SCORE_JMP, R_SCORE_24}, |
| 859 | {BFD_RELOC_SCORE_BRANCH, R_SCORE_PC19}, |
| 860 | {BFD_RELOC_SCORE16_JMP, R_SCORE16_11}, |
| 861 | {BFD_RELOC_SCORE16_BRANCH, R_SCORE16_PC8}, |
| 862 | {BFD_RELOC_32, R_SCORE_ABS32}, |
| 863 | {BFD_RELOC_16, R_SCORE_ABS16}, |
| 864 | {BFD_RELOC_SCORE_DUMMY2, R_SCORE_DUMMY2}, |
| 865 | {BFD_RELOC_SCORE_GPREL15, R_SCORE_GP15}, |
| 866 | {BFD_RELOC_VTABLE_INHERIT, R_SCORE_GNU_VTINHERIT}, |
| 867 | {BFD_RELOC_VTABLE_ENTRY, R_SCORE_GNU_VTENTRY}, |
| 868 | {BFD_RELOC_SCORE_GOT15, R_SCORE_GOT15}, |
| 869 | {BFD_RELOC_SCORE_GOT_LO16, R_SCORE_GOT_LO16}, |
| 870 | {BFD_RELOC_SCORE_CALL15, R_SCORE_CALL15}, |
| 871 | {BFD_RELOC_GPREL32, R_SCORE_GPREL32}, |
| 872 | {BFD_RELOC_32_PCREL, R_SCORE_REL32}, |
| 873 | {BFD_RELOC_SCORE_DUMMY_HI16, R_SCORE_DUMMY_HI16}, |
| 874 | }; |
| 875 | |
| 876 | static INLINE hashval_t |
| 877 | score_elf_hash_bfd_vma (bfd_vma addr) |
| 878 | { |
| 879 | #ifdef BFD64 |
| 880 | return addr + (addr >> 32); |
| 881 | #else |
| 882 | return addr; |
| 883 | #endif |
| 884 | } |
| 885 | |
| 886 | /* got_entries only match if they're identical, except for gotidx, so |
| 887 | use all fields to compute the hash, and compare the appropriate |
| 888 | union members. */ |
| 889 | |
| 890 | static hashval_t |
| 891 | score_elf_got_entry_hash (const void *entry_) |
| 892 | { |
| 893 | const struct score_got_entry *entry = (struct score_got_entry *) entry_; |
| 894 | |
| 895 | return entry->symndx |
| 896 | + (! entry->abfd ? score_elf_hash_bfd_vma (entry->d.address) |
| 897 | : entry->abfd->id |
| 898 | + (entry->symndx >= 0 ? score_elf_hash_bfd_vma (entry->d.addend) |
| 899 | : entry->d.h->root.root.root.hash)); |
| 900 | } |
| 901 | |
| 902 | static int |
| 903 | score_elf_got_entry_eq (const void *entry1, const void *entry2) |
| 904 | { |
| 905 | const struct score_got_entry *e1 = (struct score_got_entry *) entry1; |
| 906 | const struct score_got_entry *e2 = (struct score_got_entry *) entry2; |
| 907 | |
| 908 | return e1->abfd == e2->abfd && e1->symndx == e2->symndx |
| 909 | && (! e1->abfd ? e1->d.address == e2->d.address |
| 910 | : e1->symndx >= 0 ? e1->d.addend == e2->d.addend |
| 911 | : e1->d.h == e2->d.h); |
| 912 | } |
| 913 | |
| 914 | /* If H needs a GOT entry, assign it the highest available dynamic |
| 915 | index. Otherwise, assign it the lowest available dynamic |
| 916 | index. */ |
| 917 | |
| 918 | static bfd_boolean |
| 919 | score_elf_sort_hash_table_f (struct score_elf_link_hash_entry *h, void *data) |
| 920 | { |
| 921 | struct score_elf_hash_sort_data *hsd = data; |
| 922 | |
| 923 | /* Symbols without dynamic symbol table entries aren't interesting at all. */ |
| 924 | if (h->root.dynindx == -1) |
| 925 | return TRUE; |
| 926 | |
| 927 | /* Global symbols that need GOT entries that are not explicitly |
| 928 | referenced are marked with got offset 2. Those that are |
| 929 | referenced get a 1, and those that don't need GOT entries get |
| 930 | -1. */ |
| 931 | if (h->root.got.offset == 2) |
| 932 | { |
| 933 | if (hsd->max_unref_got_dynindx == hsd->min_got_dynindx) |
| 934 | hsd->low = (struct elf_link_hash_entry *) h; |
| 935 | h->root.dynindx = hsd->max_unref_got_dynindx++; |
| 936 | } |
| 937 | else if (h->root.got.offset != 1) |
| 938 | h->root.dynindx = hsd->max_non_got_dynindx++; |
| 939 | else |
| 940 | { |
| 941 | h->root.dynindx = --hsd->min_got_dynindx; |
| 942 | hsd->low = (struct elf_link_hash_entry *) h; |
| 943 | } |
| 944 | |
| 945 | return TRUE; |
| 946 | } |
| 947 | |
| 948 | static asection * |
| 949 | score_elf_got_section (bfd *abfd, bfd_boolean maybe_excluded) |
| 950 | { |
| 951 | asection *sgot = bfd_get_linker_section (abfd, ".got"); |
| 952 | |
| 953 | if (sgot == NULL || (! maybe_excluded && (sgot->flags & SEC_EXCLUDE) != 0)) |
| 954 | return NULL; |
| 955 | return sgot; |
| 956 | } |
| 957 | |
| 958 | /* Returns the GOT information associated with the link indicated by |
| 959 | INFO. If SGOTP is non-NULL, it is filled in with the GOT section. */ |
| 960 | |
| 961 | static struct score_got_info * |
| 962 | score_elf_got_info (bfd *abfd, asection **sgotp) |
| 963 | { |
| 964 | asection *sgot; |
| 965 | struct score_got_info *g; |
| 966 | |
| 967 | sgot = score_elf_got_section (abfd, TRUE); |
| 968 | BFD_ASSERT (sgot != NULL); |
| 969 | BFD_ASSERT (elf_section_data (sgot) != NULL); |
| 970 | g = score_elf_section_data (sgot)->u.got_info; |
| 971 | BFD_ASSERT (g != NULL); |
| 972 | |
| 973 | if (sgotp) |
| 974 | *sgotp = sgot; |
| 975 | return g; |
| 976 | } |
| 977 | |
| 978 | /* Sort the dynamic symbol table so that symbols that need GOT entries |
| 979 | appear towards the end. This reduces the amount of GOT space |
| 980 | required. MAX_LOCAL is used to set the number of local symbols |
| 981 | known to be in the dynamic symbol table. During |
| 982 | s7_bfd_score_elf_size_dynamic_sections, this value is 1. Afterward, the |
| 983 | section symbols are added and the count is higher. */ |
| 984 | |
| 985 | static bfd_boolean |
| 986 | score_elf_sort_hash_table (struct bfd_link_info *info, |
| 987 | unsigned long max_local) |
| 988 | { |
| 989 | struct score_elf_hash_sort_data hsd; |
| 990 | struct score_got_info *g; |
| 991 | bfd *dynobj; |
| 992 | |
| 993 | dynobj = elf_hash_table (info)->dynobj; |
| 994 | |
| 995 | g = score_elf_got_info (dynobj, NULL); |
| 996 | |
| 997 | hsd.low = NULL; |
| 998 | hsd.max_unref_got_dynindx = |
| 999 | hsd.min_got_dynindx = elf_hash_table (info)->dynsymcount |
| 1000 | /* In the multi-got case, assigned_gotno of the master got_info |
| 1001 | indicate the number of entries that aren't referenced in the |
| 1002 | primary GOT, but that must have entries because there are |
| 1003 | dynamic relocations that reference it. Since they aren't |
| 1004 | referenced, we move them to the end of the GOT, so that they |
| 1005 | don't prevent other entries that are referenced from getting |
| 1006 | too large offsets. */ |
| 1007 | - (g->next ? g->assigned_gotno : 0); |
| 1008 | hsd.max_non_got_dynindx = max_local; |
| 1009 | score_elf_link_hash_traverse (elf_hash_table (info), |
| 1010 | score_elf_sort_hash_table_f, |
| 1011 | &hsd); |
| 1012 | |
| 1013 | /* There should have been enough room in the symbol table to |
| 1014 | accommodate both the GOT and non-GOT symbols. */ |
| 1015 | BFD_ASSERT (hsd.max_non_got_dynindx <= hsd.min_got_dynindx); |
| 1016 | BFD_ASSERT ((unsigned long) hsd.max_unref_got_dynindx |
| 1017 | <= elf_hash_table (info)->dynsymcount); |
| 1018 | |
| 1019 | /* Now we know which dynamic symbol has the lowest dynamic symbol |
| 1020 | table index in the GOT. */ |
| 1021 | g->global_gotsym = hsd.low; |
| 1022 | |
| 1023 | return TRUE; |
| 1024 | } |
| 1025 | |
| 1026 | /* Returns the first relocation of type r_type found, beginning with |
| 1027 | RELOCATION. RELEND is one-past-the-end of the relocation table. */ |
| 1028 | |
| 1029 | static const Elf_Internal_Rela * |
| 1030 | score_elf_next_relocation (bfd *abfd ATTRIBUTE_UNUSED, unsigned int r_type, |
| 1031 | const Elf_Internal_Rela *relocation, |
| 1032 | const Elf_Internal_Rela *relend) |
| 1033 | { |
| 1034 | while (relocation < relend) |
| 1035 | { |
| 1036 | if (ELF32_R_TYPE (relocation->r_info) == r_type) |
| 1037 | return relocation; |
| 1038 | |
| 1039 | ++relocation; |
| 1040 | } |
| 1041 | |
| 1042 | /* We didn't find it. */ |
| 1043 | bfd_set_error (bfd_error_bad_value); |
| 1044 | return NULL; |
| 1045 | } |
| 1046 | |
| 1047 | /* This function is called via qsort() to sort the dynamic relocation |
| 1048 | entries by increasing r_symndx value. */ |
| 1049 | static int |
| 1050 | score_elf_sort_dynamic_relocs (const void *arg1, const void *arg2) |
| 1051 | { |
| 1052 | Elf_Internal_Rela int_reloc1; |
| 1053 | Elf_Internal_Rela int_reloc2; |
| 1054 | |
| 1055 | bfd_elf32_swap_reloc_in (reldyn_sorting_bfd, arg1, &int_reloc1); |
| 1056 | bfd_elf32_swap_reloc_in (reldyn_sorting_bfd, arg2, &int_reloc2); |
| 1057 | |
| 1058 | return (ELF32_R_SYM (int_reloc1.r_info) - ELF32_R_SYM (int_reloc2.r_info)); |
| 1059 | } |
| 1060 | |
| 1061 | /* Return whether a relocation is against a local symbol. */ |
| 1062 | static bfd_boolean |
| 1063 | score_elf_local_relocation_p (bfd *input_bfd, |
| 1064 | const Elf_Internal_Rela *relocation, |
| 1065 | asection **local_sections, |
| 1066 | bfd_boolean check_forced) |
| 1067 | { |
| 1068 | unsigned long r_symndx; |
| 1069 | Elf_Internal_Shdr *symtab_hdr; |
| 1070 | struct score_elf_link_hash_entry *h; |
| 1071 | size_t extsymoff; |
| 1072 | |
| 1073 | r_symndx = ELF32_R_SYM (relocation->r_info); |
| 1074 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1075 | extsymoff = (elf_bad_symtab (input_bfd)) ? 0 : symtab_hdr->sh_info; |
| 1076 | |
| 1077 | if (r_symndx < extsymoff) |
| 1078 | return TRUE; |
| 1079 | if (elf_bad_symtab (input_bfd) && local_sections[r_symndx] != NULL) |
| 1080 | return TRUE; |
| 1081 | |
| 1082 | if (check_forced) |
| 1083 | { |
| 1084 | /* Look up the hash table to check whether the symbol was forced local. */ |
| 1085 | h = (struct score_elf_link_hash_entry *) |
| 1086 | elf_sym_hashes (input_bfd) [r_symndx - extsymoff]; |
| 1087 | /* Find the real hash-table entry for this symbol. */ |
| 1088 | while (h->root.root.type == bfd_link_hash_indirect |
| 1089 | || h->root.root.type == bfd_link_hash_warning) |
| 1090 | h = (struct score_elf_link_hash_entry *) h->root.root.u.i.link; |
| 1091 | if (h->root.forced_local) |
| 1092 | return TRUE; |
| 1093 | } |
| 1094 | |
| 1095 | return FALSE; |
| 1096 | } |
| 1097 | |
| 1098 | /* Returns the dynamic relocation section for DYNOBJ. */ |
| 1099 | |
| 1100 | static asection * |
| 1101 | score_elf_rel_dyn_section (bfd *dynobj, bfd_boolean create_p) |
| 1102 | { |
| 1103 | static const char dname[] = ".rel.dyn"; |
| 1104 | asection *sreloc; |
| 1105 | |
| 1106 | sreloc = bfd_get_linker_section (dynobj, dname); |
| 1107 | if (sreloc == NULL && create_p) |
| 1108 | { |
| 1109 | sreloc = bfd_make_section_anyway_with_flags (dynobj, dname, |
| 1110 | (SEC_ALLOC |
| 1111 | | SEC_LOAD |
| 1112 | | SEC_HAS_CONTENTS |
| 1113 | | SEC_IN_MEMORY |
| 1114 | | SEC_LINKER_CREATED |
| 1115 | | SEC_READONLY)); |
| 1116 | if (sreloc == NULL |
| 1117 | || !bfd_set_section_alignment (sreloc, |
| 1118 | SCORE_ELF_LOG_FILE_ALIGN (dynobj))) |
| 1119 | return NULL; |
| 1120 | } |
| 1121 | return sreloc; |
| 1122 | } |
| 1123 | |
| 1124 | static void |
| 1125 | score_elf_allocate_dynamic_relocations (bfd *abfd, unsigned int n) |
| 1126 | { |
| 1127 | asection *s; |
| 1128 | |
| 1129 | s = score_elf_rel_dyn_section (abfd, FALSE); |
| 1130 | BFD_ASSERT (s != NULL); |
| 1131 | |
| 1132 | if (s->size == 0) |
| 1133 | { |
| 1134 | /* Make room for a null element. */ |
| 1135 | s->size += SCORE_ELF_REL_SIZE (abfd); |
| 1136 | ++s->reloc_count; |
| 1137 | } |
| 1138 | s->size += n * SCORE_ELF_REL_SIZE (abfd); |
| 1139 | } |
| 1140 | |
| 1141 | /* Create a rel.dyn relocation for the dynamic linker to resolve. REL |
| 1142 | is the original relocation, which is now being transformed into a |
| 1143 | dynamic relocation. The ADDENDP is adjusted if necessary; the |
| 1144 | caller should store the result in place of the original addend. */ |
| 1145 | |
| 1146 | static bfd_boolean |
| 1147 | score_elf_create_dynamic_relocation (bfd *output_bfd, |
| 1148 | struct bfd_link_info *info, |
| 1149 | const Elf_Internal_Rela *rel, |
| 1150 | struct score_elf_link_hash_entry *h, |
| 1151 | bfd_vma symbol, |
| 1152 | bfd_vma *addendp, asection *input_section) |
| 1153 | { |
| 1154 | Elf_Internal_Rela outrel[3]; |
| 1155 | asection *sreloc; |
| 1156 | bfd *dynobj; |
| 1157 | int r_type; |
| 1158 | long indx; |
| 1159 | bfd_boolean defined_p; |
| 1160 | |
| 1161 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1162 | dynobj = elf_hash_table (info)->dynobj; |
| 1163 | sreloc = score_elf_rel_dyn_section (dynobj, FALSE); |
| 1164 | BFD_ASSERT (sreloc != NULL); |
| 1165 | BFD_ASSERT (sreloc->contents != NULL); |
| 1166 | BFD_ASSERT (sreloc->reloc_count * SCORE_ELF_REL_SIZE (output_bfd) < sreloc->size); |
| 1167 | |
| 1168 | outrel[0].r_offset = |
| 1169 | _bfd_elf_section_offset (output_bfd, info, input_section, rel[0].r_offset); |
| 1170 | outrel[1].r_offset = |
| 1171 | _bfd_elf_section_offset (output_bfd, info, input_section, rel[1].r_offset); |
| 1172 | outrel[2].r_offset = |
| 1173 | _bfd_elf_section_offset (output_bfd, info, input_section, rel[2].r_offset); |
| 1174 | |
| 1175 | if (outrel[0].r_offset == MINUS_ONE) |
| 1176 | /* The relocation field has been deleted. */ |
| 1177 | return TRUE; |
| 1178 | |
| 1179 | if (outrel[0].r_offset == MINUS_TWO) |
| 1180 | { |
| 1181 | /* The relocation field has been converted into a relative value of |
| 1182 | some sort. Functions like _bfd_elf_write_section_eh_frame expect |
| 1183 | the field to be fully relocated, so add in the symbol's value. */ |
| 1184 | *addendp += symbol; |
| 1185 | return TRUE; |
| 1186 | } |
| 1187 | |
| 1188 | /* We must now calculate the dynamic symbol table index to use |
| 1189 | in the relocation. */ |
| 1190 | if (h != NULL |
| 1191 | && (! info->symbolic || !h->root.def_regular) |
| 1192 | /* h->root.dynindx may be -1 if this symbol was marked to |
| 1193 | become local. */ |
| 1194 | && h->root.dynindx != -1) |
| 1195 | { |
| 1196 | indx = h->root.dynindx; |
| 1197 | /* ??? glibc's ld.so just adds the final GOT entry to the |
| 1198 | relocation field. It therefore treats relocs against |
| 1199 | defined symbols in the same way as relocs against |
| 1200 | undefined symbols. */ |
| 1201 | defined_p = FALSE; |
| 1202 | } |
| 1203 | else |
| 1204 | { |
| 1205 | indx = 0; |
| 1206 | defined_p = TRUE; |
| 1207 | } |
| 1208 | |
| 1209 | /* If the relocation was previously an absolute relocation and |
| 1210 | this symbol will not be referred to by the relocation, we must |
| 1211 | adjust it by the value we give it in the dynamic symbol table. |
| 1212 | Otherwise leave the job up to the dynamic linker. */ |
| 1213 | if (defined_p && r_type != R_SCORE_REL32) |
| 1214 | *addendp += symbol; |
| 1215 | |
| 1216 | /* The relocation is always an REL32 relocation because we don't |
| 1217 | know where the shared library will wind up at load-time. */ |
| 1218 | outrel[0].r_info = ELF32_R_INFO ((unsigned long) indx, R_SCORE_REL32); |
| 1219 | |
| 1220 | /* For strict adherence to the ABI specification, we should |
| 1221 | generate a R_SCORE_64 relocation record by itself before the |
| 1222 | _REL32/_64 record as well, such that the addend is read in as |
| 1223 | a 64-bit value (REL32 is a 32-bit relocation, after all). |
| 1224 | However, since none of the existing ELF64 SCORE dynamic |
| 1225 | loaders seems to care, we don't waste space with these |
| 1226 | artificial relocations. If this turns out to not be true, |
| 1227 | score_elf_allocate_dynamic_relocations() should be tweaked so |
| 1228 | as to make room for a pair of dynamic relocations per |
| 1229 | invocation if ABI_64_P, and here we should generate an |
| 1230 | additional relocation record with R_SCORE_64 by itself for a |
| 1231 | NULL symbol before this relocation record. */ |
| 1232 | outrel[1].r_info = ELF32_R_INFO (0, R_SCORE_NONE); |
| 1233 | outrel[2].r_info = ELF32_R_INFO (0, R_SCORE_NONE); |
| 1234 | |
| 1235 | /* Adjust the output offset of the relocation to reference the |
| 1236 | correct location in the output file. */ |
| 1237 | outrel[0].r_offset += (input_section->output_section->vma |
| 1238 | + input_section->output_offset); |
| 1239 | outrel[1].r_offset += (input_section->output_section->vma |
| 1240 | + input_section->output_offset); |
| 1241 | outrel[2].r_offset += (input_section->output_section->vma |
| 1242 | + input_section->output_offset); |
| 1243 | |
| 1244 | /* Put the relocation back out. We have to use the special |
| 1245 | relocation outputter in the 64-bit case since the 64-bit |
| 1246 | relocation format is non-standard. */ |
| 1247 | bfd_elf32_swap_reloc_out |
| 1248 | (output_bfd, &outrel[0], |
| 1249 | (sreloc->contents + sreloc->reloc_count * sizeof (Elf32_External_Rel))); |
| 1250 | |
| 1251 | /* We've now added another relocation. */ |
| 1252 | ++sreloc->reloc_count; |
| 1253 | |
| 1254 | /* Make sure the output section is writable. The dynamic linker |
| 1255 | will be writing to it. */ |
| 1256 | elf_section_data (input_section->output_section)->this_hdr.sh_flags |= SHF_WRITE; |
| 1257 | |
| 1258 | return TRUE; |
| 1259 | } |
| 1260 | |
| 1261 | static bfd_boolean |
| 1262 | score_elf_create_got_section (bfd *abfd, |
| 1263 | struct bfd_link_info *info, |
| 1264 | bfd_boolean maybe_exclude) |
| 1265 | { |
| 1266 | flagword flags; |
| 1267 | asection *s; |
| 1268 | struct elf_link_hash_entry *h; |
| 1269 | struct bfd_link_hash_entry *bh; |
| 1270 | struct score_got_info *g; |
| 1271 | bfd_size_type amt; |
| 1272 | |
| 1273 | /* This function may be called more than once. */ |
| 1274 | s = score_elf_got_section (abfd, TRUE); |
| 1275 | if (s) |
| 1276 | { |
| 1277 | if (! maybe_exclude) |
| 1278 | s->flags &= ~SEC_EXCLUDE; |
| 1279 | return TRUE; |
| 1280 | } |
| 1281 | |
| 1282 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 1283 | |
| 1284 | if (maybe_exclude) |
| 1285 | flags |= SEC_EXCLUDE; |
| 1286 | |
| 1287 | /* We have to use an alignment of 2**4 here because this is hardcoded |
| 1288 | in the function stub generation and in the linker script. */ |
| 1289 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
| 1290 | elf_hash_table (info)->sgot = s; |
| 1291 | if (s == NULL |
| 1292 | || !bfd_set_section_alignment (s, 4)) |
| 1293 | return FALSE; |
| 1294 | |
| 1295 | /* Define the symbol _GLOBAL_OFFSET_TABLE_. We don't do this in the |
| 1296 | linker script because we don't want to define the symbol if we |
| 1297 | are not creating a global offset table. */ |
| 1298 | bh = NULL; |
| 1299 | if (! (_bfd_generic_link_add_one_symbol |
| 1300 | (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s, |
| 1301 | 0, NULL, FALSE, get_elf_backend_data (abfd)->collect, &bh))) |
| 1302 | return FALSE; |
| 1303 | |
| 1304 | h = (struct elf_link_hash_entry *) bh; |
| 1305 | h->non_elf = 0; |
| 1306 | h->def_regular = 1; |
| 1307 | h->type = STT_OBJECT; |
| 1308 | elf_hash_table (info)->hgot = h; |
| 1309 | |
| 1310 | if (bfd_link_pic (info) |
| 1311 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1312 | return FALSE; |
| 1313 | |
| 1314 | amt = sizeof (struct score_got_info); |
| 1315 | g = bfd_alloc (abfd, amt); |
| 1316 | if (g == NULL) |
| 1317 | return FALSE; |
| 1318 | |
| 1319 | g->global_gotsym = NULL; |
| 1320 | g->global_gotno = 0; |
| 1321 | |
| 1322 | g->local_gotno = SCORE_RESERVED_GOTNO; |
| 1323 | g->assigned_gotno = SCORE_RESERVED_GOTNO; |
| 1324 | g->next = NULL; |
| 1325 | |
| 1326 | g->got_entries = htab_try_create (1, score_elf_got_entry_hash, |
| 1327 | score_elf_got_entry_eq, NULL); |
| 1328 | if (g->got_entries == NULL) |
| 1329 | return FALSE; |
| 1330 | score_elf_section_data (s)->u.got_info = g; |
| 1331 | score_elf_section_data (s)->elf.this_hdr.sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_SCORE_GPREL; |
| 1332 | |
| 1333 | return TRUE; |
| 1334 | } |
| 1335 | |
| 1336 | /* Calculate the %high function. */ |
| 1337 | |
| 1338 | static bfd_vma |
| 1339 | score_elf_high (bfd_vma value) |
| 1340 | { |
| 1341 | return ((value + (bfd_vma) 0x8000) >> 16) & 0xffff; |
| 1342 | } |
| 1343 | |
| 1344 | /* Create a local GOT entry for VALUE. Return the index of the entry, |
| 1345 | or -1 if it could not be created. */ |
| 1346 | |
| 1347 | static struct score_got_entry * |
| 1348 | score_elf_create_local_got_entry (bfd *abfd, |
| 1349 | bfd *ibfd ATTRIBUTE_UNUSED, |
| 1350 | struct score_got_info *gg, |
| 1351 | asection *sgot, bfd_vma value, |
| 1352 | unsigned long r_symndx ATTRIBUTE_UNUSED, |
| 1353 | struct score_elf_link_hash_entry *h ATTRIBUTE_UNUSED, |
| 1354 | int r_type ATTRIBUTE_UNUSED) |
| 1355 | { |
| 1356 | struct score_got_entry entry, **loc; |
| 1357 | struct score_got_info *g; |
| 1358 | |
| 1359 | entry.abfd = NULL; |
| 1360 | entry.symndx = -1; |
| 1361 | entry.d.address = value; |
| 1362 | |
| 1363 | g = gg; |
| 1364 | loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT); |
| 1365 | if (*loc) |
| 1366 | return *loc; |
| 1367 | |
| 1368 | entry.gotidx = SCORE_ELF_GOT_SIZE (abfd) * g->assigned_gotno++; |
| 1369 | |
| 1370 | *loc = bfd_alloc (abfd, sizeof entry); |
| 1371 | |
| 1372 | if (! *loc) |
| 1373 | return NULL; |
| 1374 | |
| 1375 | memcpy (*loc, &entry, sizeof entry); |
| 1376 | |
| 1377 | if (g->assigned_gotno >= g->local_gotno) |
| 1378 | { |
| 1379 | (*loc)->gotidx = -1; |
| 1380 | /* We didn't allocate enough space in the GOT. */ |
| 1381 | _bfd_error_handler |
| 1382 | (_("not enough GOT space for local GOT entries")); |
| 1383 | bfd_set_error (bfd_error_bad_value); |
| 1384 | return NULL; |
| 1385 | } |
| 1386 | |
| 1387 | bfd_put_32 (abfd, value, (sgot->contents + entry.gotidx)); |
| 1388 | |
| 1389 | return *loc; |
| 1390 | } |
| 1391 | |
| 1392 | /* Find a GOT entry whose higher-order 16 bits are the same as those |
| 1393 | for value. Return the index into the GOT for this entry. */ |
| 1394 | |
| 1395 | static bfd_vma |
| 1396 | score_elf_got16_entry (bfd *abfd, bfd *ibfd, struct bfd_link_info *info, |
| 1397 | bfd_vma value, bfd_boolean external) |
| 1398 | { |
| 1399 | asection *sgot; |
| 1400 | struct score_got_info *g; |
| 1401 | struct score_got_entry *entry; |
| 1402 | |
| 1403 | if (!external) |
| 1404 | { |
| 1405 | /* Although the ABI says that it is "the high-order 16 bits" that we |
| 1406 | want, it is really the %high value. The complete value is |
| 1407 | calculated with a `addiu' of a LO16 relocation, just as with a |
| 1408 | HI16/LO16 pair. */ |
| 1409 | value = score_elf_high (value) << 16; |
| 1410 | } |
| 1411 | |
| 1412 | g = score_elf_got_info (elf_hash_table (info)->dynobj, &sgot); |
| 1413 | |
| 1414 | entry = score_elf_create_local_got_entry (abfd, ibfd, g, sgot, value, 0, NULL, |
| 1415 | R_SCORE_GOT15); |
| 1416 | if (entry) |
| 1417 | return entry->gotidx; |
| 1418 | else |
| 1419 | return MINUS_ONE; |
| 1420 | } |
| 1421 | |
| 1422 | void |
| 1423 | s7_bfd_score_elf_hide_symbol (struct bfd_link_info *info, |
| 1424 | struct elf_link_hash_entry *entry, |
| 1425 | bfd_boolean force_local) |
| 1426 | { |
| 1427 | bfd *dynobj; |
| 1428 | asection *got; |
| 1429 | struct score_got_info *g; |
| 1430 | struct score_elf_link_hash_entry *h; |
| 1431 | |
| 1432 | h = (struct score_elf_link_hash_entry *) entry; |
| 1433 | if (h->forced_local) |
| 1434 | return; |
| 1435 | h->forced_local = TRUE; |
| 1436 | |
| 1437 | dynobj = elf_hash_table (info)->dynobj; |
| 1438 | if (dynobj != NULL && force_local) |
| 1439 | { |
| 1440 | got = score_elf_got_section (dynobj, FALSE); |
| 1441 | if (got == NULL) |
| 1442 | return; |
| 1443 | g = score_elf_section_data (got)->u.got_info; |
| 1444 | |
| 1445 | if (g->next) |
| 1446 | { |
| 1447 | struct score_got_entry e; |
| 1448 | struct score_got_info *gg = g; |
| 1449 | |
| 1450 | /* Since we're turning what used to be a global symbol into a |
| 1451 | local one, bump up the number of local entries of each GOT |
| 1452 | that had an entry for it. This will automatically decrease |
| 1453 | the number of global entries, since global_gotno is actually |
| 1454 | the upper limit of global entries. */ |
| 1455 | e.abfd = dynobj; |
| 1456 | e.symndx = -1; |
| 1457 | e.d.h = h; |
| 1458 | |
| 1459 | for (g = g->next; g != gg; g = g->next) |
| 1460 | if (htab_find (g->got_entries, &e)) |
| 1461 | { |
| 1462 | BFD_ASSERT (g->global_gotno > 0); |
| 1463 | g->local_gotno++; |
| 1464 | g->global_gotno--; |
| 1465 | } |
| 1466 | |
| 1467 | /* If this was a global symbol forced into the primary GOT, we |
| 1468 | no longer need an entry for it. We can't release the entry |
| 1469 | at this point, but we must at least stop counting it as one |
| 1470 | of the symbols that required a forced got entry. */ |
| 1471 | if (h->root.got.offset == 2) |
| 1472 | { |
| 1473 | BFD_ASSERT (gg->assigned_gotno > 0); |
| 1474 | gg->assigned_gotno--; |
| 1475 | } |
| 1476 | } |
| 1477 | else if (g->global_gotno == 0 && g->global_gotsym == NULL) |
| 1478 | /* If we haven't got through GOT allocation yet, just bump up the |
| 1479 | number of local entries, as this symbol won't be counted as |
| 1480 | global. */ |
| 1481 | g->local_gotno++; |
| 1482 | else if (h->root.got.offset == 1) |
| 1483 | { |
| 1484 | /* If we're past non-multi-GOT allocation and this symbol had |
| 1485 | been marked for a global got entry, give it a local entry |
| 1486 | instead. */ |
| 1487 | BFD_ASSERT (g->global_gotno > 0); |
| 1488 | g->local_gotno++; |
| 1489 | g->global_gotno--; |
| 1490 | } |
| 1491 | } |
| 1492 | |
| 1493 | _bfd_elf_link_hash_hide_symbol (info, &h->root, force_local); |
| 1494 | } |
| 1495 | |
| 1496 | /* If H is a symbol that needs a global GOT entry, but has a dynamic |
| 1497 | symbol table index lower than any we've seen to date, record it for |
| 1498 | posterity. */ |
| 1499 | |
| 1500 | static bfd_boolean |
| 1501 | score_elf_record_global_got_symbol (struct elf_link_hash_entry *h, |
| 1502 | bfd *abfd, |
| 1503 | struct bfd_link_info *info, |
| 1504 | struct score_got_info *g) |
| 1505 | { |
| 1506 | struct score_got_entry entry, **loc; |
| 1507 | |
| 1508 | /* A global symbol in the GOT must also be in the dynamic symbol table. */ |
| 1509 | if (h->dynindx == -1) |
| 1510 | { |
| 1511 | switch (ELF_ST_VISIBILITY (h->other)) |
| 1512 | { |
| 1513 | case STV_INTERNAL: |
| 1514 | case STV_HIDDEN: |
| 1515 | s7_bfd_score_elf_hide_symbol (info, h, TRUE); |
| 1516 | break; |
| 1517 | } |
| 1518 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1519 | return FALSE; |
| 1520 | } |
| 1521 | |
| 1522 | entry.abfd = abfd; |
| 1523 | entry.symndx = -1; |
| 1524 | entry.d.h = (struct score_elf_link_hash_entry *) h; |
| 1525 | |
| 1526 | loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT); |
| 1527 | |
| 1528 | /* If we've already marked this entry as needing GOT space, we don't |
| 1529 | need to do it again. */ |
| 1530 | if (*loc) |
| 1531 | return TRUE; |
| 1532 | |
| 1533 | *loc = bfd_alloc (abfd, sizeof entry); |
| 1534 | if (! *loc) |
| 1535 | return FALSE; |
| 1536 | |
| 1537 | entry.gotidx = -1; |
| 1538 | |
| 1539 | memcpy (*loc, &entry, sizeof (entry)); |
| 1540 | |
| 1541 | if (h->got.offset != MINUS_ONE) |
| 1542 | return TRUE; |
| 1543 | |
| 1544 | /* By setting this to a value other than -1, we are indicating that |
| 1545 | there needs to be a GOT entry for H. Avoid using zero, as the |
| 1546 | generic ELF copy_indirect_symbol tests for <= 0. */ |
| 1547 | h->got.offset = 1; |
| 1548 | |
| 1549 | return TRUE; |
| 1550 | } |
| 1551 | |
| 1552 | /* Reserve space in G for a GOT entry containing the value of symbol |
| 1553 | SYMNDX in input bfd ABDF, plus ADDEND. */ |
| 1554 | |
| 1555 | static bfd_boolean |
| 1556 | score_elf_record_local_got_symbol (bfd *abfd, |
| 1557 | long symndx, |
| 1558 | bfd_vma addend, |
| 1559 | struct score_got_info *g) |
| 1560 | { |
| 1561 | struct score_got_entry entry, **loc; |
| 1562 | |
| 1563 | entry.abfd = abfd; |
| 1564 | entry.symndx = symndx; |
| 1565 | entry.d.addend = addend; |
| 1566 | loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT); |
| 1567 | |
| 1568 | if (*loc) |
| 1569 | return TRUE; |
| 1570 | |
| 1571 | entry.gotidx = g->local_gotno++; |
| 1572 | |
| 1573 | *loc = bfd_alloc (abfd, sizeof(entry)); |
| 1574 | if (! *loc) |
| 1575 | return FALSE; |
| 1576 | |
| 1577 | memcpy (*loc, &entry, sizeof (entry)); |
| 1578 | |
| 1579 | return TRUE; |
| 1580 | } |
| 1581 | |
| 1582 | /* Returns the GOT offset at which the indicated address can be found. |
| 1583 | If there is not yet a GOT entry for this value, create one. |
| 1584 | Returns -1 if no satisfactory GOT offset can be found. */ |
| 1585 | |
| 1586 | static bfd_vma |
| 1587 | score_elf_local_got_index (bfd *abfd, bfd *ibfd, struct bfd_link_info *info, |
| 1588 | bfd_vma value, unsigned long r_symndx, |
| 1589 | struct score_elf_link_hash_entry *h, int r_type) |
| 1590 | { |
| 1591 | asection *sgot; |
| 1592 | struct score_got_info *g; |
| 1593 | struct score_got_entry *entry; |
| 1594 | |
| 1595 | g = score_elf_got_info (elf_hash_table (info)->dynobj, &sgot); |
| 1596 | |
| 1597 | entry = score_elf_create_local_got_entry (abfd, ibfd, g, sgot, value, |
| 1598 | r_symndx, h, r_type); |
| 1599 | if (!entry) |
| 1600 | return MINUS_ONE; |
| 1601 | |
| 1602 | else |
| 1603 | return entry->gotidx; |
| 1604 | } |
| 1605 | |
| 1606 | /* Returns the GOT index for the global symbol indicated by H. */ |
| 1607 | |
| 1608 | static bfd_vma |
| 1609 | score_elf_global_got_index (bfd *abfd, struct elf_link_hash_entry *h) |
| 1610 | { |
| 1611 | bfd_vma got_index; |
| 1612 | asection *sgot; |
| 1613 | struct score_got_info *g; |
| 1614 | long global_got_dynindx = 0; |
| 1615 | |
| 1616 | g = score_elf_got_info (abfd, &sgot); |
| 1617 | if (g->global_gotsym != NULL) |
| 1618 | global_got_dynindx = g->global_gotsym->dynindx; |
| 1619 | |
| 1620 | /* Once we determine the global GOT entry with the lowest dynamic |
| 1621 | symbol table index, we must put all dynamic symbols with greater |
| 1622 | indices into the GOT. That makes it easy to calculate the GOT |
| 1623 | offset. */ |
| 1624 | BFD_ASSERT (h->dynindx >= global_got_dynindx); |
| 1625 | got_index = ((h->dynindx - global_got_dynindx + g->local_gotno) * SCORE_ELF_GOT_SIZE (abfd)); |
| 1626 | BFD_ASSERT (got_index < sgot->size); |
| 1627 | |
| 1628 | return got_index; |
| 1629 | } |
| 1630 | |
| 1631 | /* Returns the offset for the entry at the INDEXth position in the GOT. */ |
| 1632 | |
| 1633 | static bfd_vma |
| 1634 | score_elf_got_offset_from_index (bfd *dynobj, |
| 1635 | bfd *output_bfd, |
| 1636 | bfd *input_bfd ATTRIBUTE_UNUSED, |
| 1637 | bfd_vma got_index) |
| 1638 | { |
| 1639 | asection *sgot; |
| 1640 | bfd_vma gp; |
| 1641 | |
| 1642 | score_elf_got_info (dynobj, &sgot); |
| 1643 | gp = _bfd_get_gp_value (output_bfd); |
| 1644 | |
| 1645 | return sgot->output_section->vma + sgot->output_offset + got_index - gp; |
| 1646 | } |
| 1647 | |
| 1648 | /* Follow indirect and warning hash entries so that each got entry |
| 1649 | points to the final symbol definition. P must point to a pointer |
| 1650 | to the hash table we're traversing. Since this traversal may |
| 1651 | modify the hash table, we set this pointer to NULL to indicate |
| 1652 | we've made a potentially-destructive change to the hash table, so |
| 1653 | the traversal must be restarted. */ |
| 1654 | |
| 1655 | static int |
| 1656 | score_elf_resolve_final_got_entry (void **entryp, void *p) |
| 1657 | { |
| 1658 | struct score_got_entry *entry = (struct score_got_entry *) *entryp; |
| 1659 | htab_t got_entries = *(htab_t *) p; |
| 1660 | |
| 1661 | if (entry->abfd != NULL && entry->symndx == -1) |
| 1662 | { |
| 1663 | struct score_elf_link_hash_entry *h = entry->d.h; |
| 1664 | |
| 1665 | while (h->root.root.type == bfd_link_hash_indirect |
| 1666 | || h->root.root.type == bfd_link_hash_warning) |
| 1667 | h = (struct score_elf_link_hash_entry *) h->root.root.u.i.link; |
| 1668 | |
| 1669 | if (entry->d.h == h) |
| 1670 | return 1; |
| 1671 | |
| 1672 | entry->d.h = h; |
| 1673 | |
| 1674 | /* If we can't find this entry with the new bfd hash, re-insert |
| 1675 | it, and get the traversal restarted. */ |
| 1676 | if (! htab_find (got_entries, entry)) |
| 1677 | { |
| 1678 | htab_clear_slot (got_entries, entryp); |
| 1679 | entryp = htab_find_slot (got_entries, entry, INSERT); |
| 1680 | if (! *entryp) |
| 1681 | *entryp = entry; |
| 1682 | /* Abort the traversal, since the whole table may have |
| 1683 | moved, and leave it up to the parent to restart the |
| 1684 | process. */ |
| 1685 | *(htab_t *) p = NULL; |
| 1686 | return 0; |
| 1687 | } |
| 1688 | /* We might want to decrement the global_gotno count, but it's |
| 1689 | either too early or too late for that at this point. */ |
| 1690 | } |
| 1691 | |
| 1692 | return 1; |
| 1693 | } |
| 1694 | |
| 1695 | /* Turn indirect got entries in a got_entries table into their final locations. */ |
| 1696 | |
| 1697 | static void |
| 1698 | score_elf_resolve_final_got_entries (struct score_got_info *g) |
| 1699 | { |
| 1700 | htab_t got_entries; |
| 1701 | |
| 1702 | do |
| 1703 | { |
| 1704 | got_entries = g->got_entries; |
| 1705 | |
| 1706 | htab_traverse (got_entries, |
| 1707 | score_elf_resolve_final_got_entry, |
| 1708 | &got_entries); |
| 1709 | } |
| 1710 | while (got_entries == NULL); |
| 1711 | } |
| 1712 | |
| 1713 | /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. for -r */ |
| 1714 | |
| 1715 | static void |
| 1716 | score_elf_add_to_rel (bfd *abfd, |
| 1717 | bfd_byte *address, |
| 1718 | reloc_howto_type *howto, |
| 1719 | bfd_signed_vma increment) |
| 1720 | { |
| 1721 | bfd_signed_vma addend; |
| 1722 | bfd_vma contents; |
| 1723 | unsigned long offset; |
| 1724 | unsigned long r_type = howto->type; |
| 1725 | unsigned long hi16_addend, hi16_offset, hi16_value, uvalue; |
| 1726 | |
| 1727 | contents = bfd_get_32 (abfd, address); |
| 1728 | /* Get the (signed) value from the instruction. */ |
| 1729 | addend = contents & howto->src_mask; |
| 1730 | if (addend & ((howto->src_mask + 1) >> 1)) |
| 1731 | { |
| 1732 | bfd_signed_vma mask; |
| 1733 | |
| 1734 | mask = -1; |
| 1735 | mask &= ~howto->src_mask; |
| 1736 | addend |= mask; |
| 1737 | } |
| 1738 | /* Add in the increment, (which is a byte value). */ |
| 1739 | switch (r_type) |
| 1740 | { |
| 1741 | case R_SCORE_PC19: |
| 1742 | offset = |
| 1743 | (((contents & howto->src_mask) & 0x3ff0000) >> 6) | ((contents & howto->src_mask) & 0x3ff); |
| 1744 | offset += increment; |
| 1745 | contents = |
| 1746 | (contents & ~howto-> |
| 1747 | src_mask) | (((offset << 6) & howto->src_mask) & 0x3ff0000) | (offset & 0x3ff); |
| 1748 | bfd_put_32 (abfd, contents, address); |
| 1749 | break; |
| 1750 | case R_SCORE_HI16: |
| 1751 | break; |
| 1752 | case R_SCORE_LO16: |
| 1753 | hi16_addend = bfd_get_32 (abfd, address - 4); |
| 1754 | hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1; |
| 1755 | offset = ((((contents >> 16) & 0x3) << 15) | (contents & 0x7fff)) >> 1; |
| 1756 | offset = (hi16_offset << 16) | (offset & 0xffff); |
| 1757 | uvalue = increment + offset; |
| 1758 | hi16_offset = (uvalue >> 16) << 1; |
| 1759 | hi16_value = (hi16_addend & (~(howto->dst_mask))) |
| 1760 | | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000); |
| 1761 | bfd_put_32 (abfd, hi16_value, address - 4); |
| 1762 | offset = (uvalue & 0xffff) << 1; |
| 1763 | contents = (contents & (~(howto->dst_mask))) | (offset & 0x7fff) | ((offset << 1) & 0x30000); |
| 1764 | bfd_put_32 (abfd, contents, address); |
| 1765 | break; |
| 1766 | case R_SCORE_24: |
| 1767 | offset = |
| 1768 | (((contents & howto->src_mask) >> 1) & 0x1ff8000) | ((contents & howto->src_mask) & 0x7fff); |
| 1769 | offset += increment; |
| 1770 | contents = |
| 1771 | (contents & ~howto-> |
| 1772 | src_mask) | (((offset << 1) & howto->src_mask) & 0x3ff0000) | (offset & 0x7fff); |
| 1773 | bfd_put_32 (abfd, contents, address); |
| 1774 | break; |
| 1775 | case R_SCORE16_11: |
| 1776 | |
| 1777 | contents = bfd_get_16 (abfd, address); |
| 1778 | offset = contents & howto->src_mask; |
| 1779 | offset += increment; |
| 1780 | contents = (contents & ~howto->src_mask) | (offset & howto->src_mask); |
| 1781 | bfd_put_16 (abfd, contents, address); |
| 1782 | |
| 1783 | break; |
| 1784 | case R_SCORE16_PC8: |
| 1785 | |
| 1786 | contents = bfd_get_16 (abfd, address); |
| 1787 | offset = (contents & howto->src_mask) + ((increment >> 1) & 0xff); |
| 1788 | contents = (contents & (~howto->src_mask)) | (offset & howto->src_mask); |
| 1789 | bfd_put_16 (abfd, contents, address); |
| 1790 | |
| 1791 | break; |
| 1792 | case R_SCORE_GOT15: |
| 1793 | case R_SCORE_GOT_LO16: |
| 1794 | break; |
| 1795 | |
| 1796 | default: |
| 1797 | addend += increment; |
| 1798 | contents = (contents & ~howto->dst_mask) | (addend & howto->dst_mask); |
| 1799 | bfd_put_32 (abfd, contents, address); |
| 1800 | break; |
| 1801 | } |
| 1802 | } |
| 1803 | |
| 1804 | /* Perform a relocation as part of a final link. */ |
| 1805 | |
| 1806 | static bfd_reloc_status_type |
| 1807 | score_elf_final_link_relocate (reloc_howto_type *howto, |
| 1808 | bfd *input_bfd, |
| 1809 | bfd *output_bfd, |
| 1810 | asection *input_section, |
| 1811 | bfd_byte *contents, |
| 1812 | Elf_Internal_Rela *rel, |
| 1813 | Elf_Internal_Rela *relocs, |
| 1814 | bfd_vma symbol, |
| 1815 | struct bfd_link_info *info, |
| 1816 | const char *sym_name ATTRIBUTE_UNUSED, |
| 1817 | int sym_flags ATTRIBUTE_UNUSED, |
| 1818 | struct score_elf_link_hash_entry *h, |
| 1819 | Elf_Internal_Sym *local_syms, |
| 1820 | asection **local_sections, |
| 1821 | bfd_boolean gp_disp_p) |
| 1822 | { |
| 1823 | unsigned long r_type; |
| 1824 | unsigned long r_symndx; |
| 1825 | bfd_byte *hit_data = contents + rel->r_offset; |
| 1826 | bfd_vma addend; |
| 1827 | /* The final GP value to be used for the relocatable, executable, or |
| 1828 | shared object file being produced. */ |
| 1829 | bfd_vma gp = MINUS_ONE; |
| 1830 | /* The place (section offset or address) of the storage unit being relocated. */ |
| 1831 | bfd_vma rel_addr; |
| 1832 | /* The value of GP used to create the relocatable object. */ |
| 1833 | bfd_vma gp0 = MINUS_ONE; |
| 1834 | /* The offset into the global offset table at which the address of the relocation entry |
| 1835 | symbol, adjusted by the addend, resides during execution. */ |
| 1836 | bfd_vma g = MINUS_ONE; |
| 1837 | /* TRUE if the symbol referred to by this relocation is a local symbol. */ |
| 1838 | bfd_boolean local_p; |
| 1839 | /* The eventual value we will relocate. */ |
| 1840 | bfd_vma value = symbol; |
| 1841 | unsigned long hi16_addend, hi16_offset, hi16_value, uvalue, offset, abs_value = 0; |
| 1842 | |
| 1843 | Elf_Internal_Sym *sym = 0; |
| 1844 | asection *sec = NULL; |
| 1845 | bfd_boolean merge_p = 0; |
| 1846 | |
| 1847 | |
| 1848 | if (elf_gp (output_bfd) == 0) |
| 1849 | { |
| 1850 | struct bfd_link_hash_entry *bh; |
| 1851 | asection *o; |
| 1852 | |
| 1853 | bh = bfd_link_hash_lookup (info->hash, "_gp", 0, 0, 1); |
| 1854 | if (bh != NULL && bh->type == bfd_link_hash_defined) |
| 1855 | { |
| 1856 | elf_gp (output_bfd) = (bh->u.def.value |
| 1857 | + bh->u.def.section->output_offset); |
| 1858 | if (bh->u.def.section->output_section) |
| 1859 | elf_gp (output_bfd) += bh->u.def.section->output_section->vma; |
| 1860 | } |
| 1861 | else if (bfd_link_relocatable (info)) |
| 1862 | { |
| 1863 | bfd_vma lo = -1; |
| 1864 | |
| 1865 | /* Find the GP-relative section with the lowest offset. */ |
| 1866 | for (o = output_bfd->sections; o != NULL; o = o->next) |
| 1867 | if (o->vma < lo) |
| 1868 | lo = o->vma; |
| 1869 | /* And calculate GP relative to that. */ |
| 1870 | elf_gp (output_bfd) = lo + ELF_SCORE_GP_OFFSET (input_bfd); |
| 1871 | } |
| 1872 | else |
| 1873 | { |
| 1874 | /* If the relocate_section function needs to do a reloc |
| 1875 | involving the GP value, it should make a reloc_dangerous |
| 1876 | callback to warn that GP is not defined. */ |
| 1877 | } |
| 1878 | } |
| 1879 | |
| 1880 | /* Parse the relocation. */ |
| 1881 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1882 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1883 | rel_addr = (input_section->output_section->vma + input_section->output_offset + rel->r_offset); |
| 1884 | |
| 1885 | /* For hidden symbol. */ |
| 1886 | local_p = score_elf_local_relocation_p (input_bfd, rel, local_sections, FALSE); |
| 1887 | if (local_p) |
| 1888 | { |
| 1889 | sym = local_syms + r_symndx; |
| 1890 | sec = local_sections[r_symndx]; |
| 1891 | |
| 1892 | symbol = sec->output_section->vma + sec->output_offset; |
| 1893 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION |
| 1894 | || (sec->flags & SEC_MERGE)) |
| 1895 | symbol += sym->st_value; |
| 1896 | if ((sec->flags & SEC_MERGE) |
| 1897 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 1898 | merge_p = 1; |
| 1899 | } |
| 1900 | |
| 1901 | if (r_type == R_SCORE_GOT15) |
| 1902 | { |
| 1903 | const Elf_Internal_Rela *relend; |
| 1904 | const Elf_Internal_Rela *lo16_rel; |
| 1905 | bfd_vma lo_value = 0; |
| 1906 | |
| 1907 | relend = relocs + input_section->reloc_count; |
| 1908 | lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend); |
| 1909 | if ((local_p) && (lo16_rel != NULL)) |
| 1910 | { |
| 1911 | bfd_vma tmp = 0; |
| 1912 | tmp = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset); |
| 1913 | lo_value = (((tmp >> 16) & 0x3) << 14) | ((tmp & 0x7fff) >> 1); |
| 1914 | if (merge_p) |
| 1915 | { |
| 1916 | asection *msec = sec; |
| 1917 | lo_value = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, lo_value); |
| 1918 | lo_value -= symbol; |
| 1919 | lo_value += msec->output_section->vma + msec->output_offset; |
| 1920 | } |
| 1921 | } |
| 1922 | addend = lo_value; |
| 1923 | } |
| 1924 | else |
| 1925 | { |
| 1926 | addend = (bfd_get_32 (input_bfd, hit_data) >> howto->bitpos) & howto->src_mask; |
| 1927 | } |
| 1928 | |
| 1929 | /* Figure out the value of the symbol. */ |
| 1930 | if (local_p && !merge_p) |
| 1931 | { |
| 1932 | if (r_type == R_SCORE_GOT15) |
| 1933 | { |
| 1934 | const Elf_Internal_Rela *relend; |
| 1935 | const Elf_Internal_Rela *lo16_rel; |
| 1936 | bfd_vma lo_value = 0; |
| 1937 | |
| 1938 | value = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 1939 | addend = value & 0x7fff; |
| 1940 | if ((addend & 0x4000) == 0x4000) |
| 1941 | addend |= 0xffffc000; |
| 1942 | |
| 1943 | relend = relocs + input_section->reloc_count; |
| 1944 | lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend); |
| 1945 | if ((local_p) && (lo16_rel != NULL)) |
| 1946 | { |
| 1947 | bfd_vma tmp = 0; |
| 1948 | tmp = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset); |
| 1949 | lo_value = (((tmp >> 16) & 0x3) << 14) | ((tmp & 0x7fff) >> 1); |
| 1950 | } |
| 1951 | |
| 1952 | addend <<= 16; |
| 1953 | addend += lo_value; |
| 1954 | } |
| 1955 | } |
| 1956 | |
| 1957 | local_p = score_elf_local_relocation_p (input_bfd, rel, local_sections, TRUE); |
| 1958 | |
| 1959 | /* If we haven't already determined the GOT offset, or the GP value, |
| 1960 | and we're going to need it, get it now. */ |
| 1961 | switch (r_type) |
| 1962 | { |
| 1963 | case R_SCORE_CALL15: |
| 1964 | case R_SCORE_GOT15: |
| 1965 | if (!local_p) |
| 1966 | { |
| 1967 | g = score_elf_global_got_index (elf_hash_table (info)->dynobj, |
| 1968 | (struct elf_link_hash_entry *) h); |
| 1969 | if ((! elf_hash_table(info)->dynamic_sections_created |
| 1970 | || (bfd_link_pic (info) |
| 1971 | && (info->symbolic || h->root.dynindx == -1) |
| 1972 | && h->root.def_regular))) |
| 1973 | { |
| 1974 | /* This is a static link or a -Bsymbolic link. The |
| 1975 | symbol is defined locally, or was forced to be local. |
| 1976 | We must initialize this entry in the GOT. */ |
| 1977 | bfd *tmpbfd = elf_hash_table (info)->dynobj; |
| 1978 | asection *sgot = score_elf_got_section (tmpbfd, FALSE); |
| 1979 | bfd_put_32 (tmpbfd, value, sgot->contents + g); |
| 1980 | } |
| 1981 | } |
| 1982 | else if (r_type == R_SCORE_GOT15 || r_type == R_SCORE_CALL15) |
| 1983 | { |
| 1984 | /* There's no need to create a local GOT entry here; the |
| 1985 | calculation for a local GOT15 entry does not involve G. */ |
| 1986 | ; |
| 1987 | } |
| 1988 | else |
| 1989 | { |
| 1990 | g = score_elf_local_got_index (output_bfd, input_bfd, info, |
| 1991 | symbol + addend, r_symndx, h, r_type); |
| 1992 | if (g == MINUS_ONE) |
| 1993 | return bfd_reloc_outofrange; |
| 1994 | } |
| 1995 | |
| 1996 | /* Convert GOT indices to actual offsets. */ |
| 1997 | g = score_elf_got_offset_from_index (elf_hash_table (info)->dynobj, |
| 1998 | output_bfd, input_bfd, g); |
| 1999 | break; |
| 2000 | |
| 2001 | case R_SCORE_HI16: |
| 2002 | case R_SCORE_LO16: |
| 2003 | case R_SCORE_GPREL32: |
| 2004 | gp0 = _bfd_get_gp_value (input_bfd); |
| 2005 | gp = _bfd_get_gp_value (output_bfd); |
| 2006 | break; |
| 2007 | |
| 2008 | case R_SCORE_GP15: |
| 2009 | gp = _bfd_get_gp_value (output_bfd); |
| 2010 | |
| 2011 | default: |
| 2012 | break; |
| 2013 | } |
| 2014 | |
| 2015 | switch (r_type) |
| 2016 | { |
| 2017 | case R_SCORE_NONE: |
| 2018 | return bfd_reloc_ok; |
| 2019 | |
| 2020 | case R_SCORE_ABS32: |
| 2021 | case R_SCORE_REL32: |
| 2022 | if ((bfd_link_pic (info) |
| 2023 | || (elf_hash_table (info)->dynamic_sections_created |
| 2024 | && h != NULL |
| 2025 | && h->root.def_dynamic |
| 2026 | && !h->root.def_regular)) |
| 2027 | && r_symndx != STN_UNDEF |
| 2028 | && (input_section->flags & SEC_ALLOC) != 0) |
| 2029 | { |
| 2030 | /* If we're creating a shared library, or this relocation is against a symbol |
| 2031 | in a shared library, then we can't know where the symbol will end up. |
| 2032 | So, we create a relocation record in the output, and leave the job up |
| 2033 | to the dynamic linker. */ |
| 2034 | value = addend; |
| 2035 | if (!score_elf_create_dynamic_relocation (output_bfd, info, rel, h, |
| 2036 | symbol, &value, |
| 2037 | input_section)) |
| 2038 | return bfd_reloc_undefined; |
| 2039 | } |
| 2040 | else if (r_symndx == STN_UNDEF) |
| 2041 | /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols |
| 2042 | from removed linkonce sections, or sections discarded by |
| 2043 | a linker script. */ |
| 2044 | value = 0; |
| 2045 | else |
| 2046 | { |
| 2047 | if (r_type != R_SCORE_REL32) |
| 2048 | value = symbol + addend; |
| 2049 | else |
| 2050 | value = addend; |
| 2051 | } |
| 2052 | value &= howto->dst_mask; |
| 2053 | bfd_put_32 (input_bfd, value, hit_data); |
| 2054 | return bfd_reloc_ok; |
| 2055 | |
| 2056 | case R_SCORE_ABS16: |
| 2057 | value += addend; |
| 2058 | if ((long) value > 0x7fff || (long) value < -0x8000) |
| 2059 | return bfd_reloc_overflow; |
| 2060 | bfd_put_16 (input_bfd, value, hit_data); |
| 2061 | return bfd_reloc_ok; |
| 2062 | |
| 2063 | case R_SCORE_24: |
| 2064 | addend = bfd_get_32 (input_bfd, hit_data); |
| 2065 | offset = (((addend & howto->src_mask) >> 1) & 0x1ff8000) | ((addend & howto->src_mask) & 0x7fff); |
| 2066 | if ((offset & 0x1000000) != 0) |
| 2067 | offset |= 0xfe000000; |
| 2068 | value += offset; |
| 2069 | abs_value = value - rel_addr; |
| 2070 | if ((abs_value & 0xfe000000) != 0) |
| 2071 | return bfd_reloc_overflow; |
| 2072 | addend = (addend & ~howto->src_mask) |
| 2073 | | (((value << 1) & howto->src_mask) & 0x3ff0000) | (value & 0x7fff); |
| 2074 | bfd_put_32 (input_bfd, addend, hit_data); |
| 2075 | return bfd_reloc_ok; |
| 2076 | |
| 2077 | case R_SCORE_PC19: |
| 2078 | addend = bfd_get_32 (input_bfd, hit_data); |
| 2079 | offset = (((addend & howto->src_mask) & 0x3ff0000) >> 6) | ((addend & howto->src_mask) & 0x3ff); |
| 2080 | if ((offset & 0x80000) != 0) |
| 2081 | offset |= 0xfff00000; |
| 2082 | abs_value = value = value - rel_addr + offset; |
| 2083 | /* exceed 20 bit : overflow. */ |
| 2084 | if ((abs_value & 0x80000000) == 0x80000000) |
| 2085 | abs_value = 0xffffffff - value + 1; |
| 2086 | if ((abs_value & 0xfff80000) != 0) |
| 2087 | return bfd_reloc_overflow; |
| 2088 | addend = (addend & ~howto->src_mask) |
| 2089 | | (((value << 6) & howto->src_mask) & 0x3ff0000) | (value & 0x3ff); |
| 2090 | bfd_put_32 (input_bfd, addend, hit_data); |
| 2091 | return bfd_reloc_ok; |
| 2092 | |
| 2093 | case R_SCORE16_11: |
| 2094 | addend = bfd_get_16 (input_bfd, hit_data); |
| 2095 | offset = addend & howto->src_mask; |
| 2096 | if ((offset & 0x800) != 0) /* Offset is negative. */ |
| 2097 | offset |= 0xfffff000; |
| 2098 | value += offset; |
| 2099 | abs_value = value - rel_addr; |
| 2100 | if ((abs_value & 0xfffff000) != 0) |
| 2101 | return bfd_reloc_overflow; |
| 2102 | addend = (addend & ~howto->src_mask) | (value & howto->src_mask); |
| 2103 | bfd_put_16 (input_bfd, addend, hit_data); |
| 2104 | return bfd_reloc_ok; |
| 2105 | |
| 2106 | case R_SCORE16_PC8: |
| 2107 | addend = bfd_get_16 (input_bfd, hit_data); |
| 2108 | offset = (addend & howto->src_mask) << 1; |
| 2109 | if ((offset & 0x100) != 0) /* Offset is negative. */ |
| 2110 | offset |= 0xfffffe00; |
| 2111 | abs_value = value = value - rel_addr + offset; |
| 2112 | /* Sign bit + exceed 9 bit. */ |
| 2113 | if (((value & 0xffffff00) != 0) && ((value & 0xffffff00) != 0xffffff00)) |
| 2114 | return bfd_reloc_overflow; |
| 2115 | value >>= 1; |
| 2116 | addend = (addend & ~howto->src_mask) | (value & howto->src_mask); |
| 2117 | bfd_put_16 (input_bfd, addend, hit_data); |
| 2118 | return bfd_reloc_ok; |
| 2119 | |
| 2120 | case R_SCORE_HI16: |
| 2121 | return bfd_reloc_ok; |
| 2122 | |
| 2123 | case R_SCORE_LO16: |
| 2124 | hi16_addend = bfd_get_32 (input_bfd, hit_data - 4); |
| 2125 | hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1; |
| 2126 | addend = bfd_get_32 (input_bfd, hit_data); |
| 2127 | offset = ((((addend >> 16) & 0x3) << 15) | (addend & 0x7fff)) >> 1; |
| 2128 | offset = (hi16_offset << 16) | (offset & 0xffff); |
| 2129 | |
| 2130 | if (!gp_disp_p) |
| 2131 | uvalue = value + offset; |
| 2132 | else |
| 2133 | uvalue = offset + gp - rel_addr + 4; |
| 2134 | |
| 2135 | hi16_offset = (uvalue >> 16) << 1; |
| 2136 | hi16_value = (hi16_addend & (~(howto->dst_mask))) |
| 2137 | | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000); |
| 2138 | bfd_put_32 (input_bfd, hi16_value, hit_data - 4); |
| 2139 | offset = (uvalue & 0xffff) << 1; |
| 2140 | value = (addend & (~(howto->dst_mask))) | (offset & 0x7fff) | ((offset << 1) & 0x30000); |
| 2141 | bfd_put_32 (input_bfd, value, hit_data); |
| 2142 | return bfd_reloc_ok; |
| 2143 | |
| 2144 | case R_SCORE_GP15: |
| 2145 | addend = bfd_get_32 (input_bfd, hit_data); |
| 2146 | offset = addend & 0x7fff; |
| 2147 | if ((offset & 0x4000) == 0x4000) |
| 2148 | offset |= 0xffffc000; |
| 2149 | value = value + offset - gp; |
| 2150 | if (((value & 0xffffc000) != 0) && ((value & 0xffffc000) != 0xffffc000)) |
| 2151 | return bfd_reloc_overflow; |
| 2152 | value = (addend & ~howto->src_mask) | (value & howto->src_mask); |
| 2153 | bfd_put_32 (input_bfd, value, hit_data); |
| 2154 | return bfd_reloc_ok; |
| 2155 | |
| 2156 | case R_SCORE_GOT15: |
| 2157 | case R_SCORE_CALL15: |
| 2158 | if (local_p) |
| 2159 | { |
| 2160 | bfd_boolean forced; |
| 2161 | |
| 2162 | /* The special case is when the symbol is forced to be local. We need the |
| 2163 | full address in the GOT since no R_SCORE_GOT_LO16 relocation follows. */ |
| 2164 | forced = ! score_elf_local_relocation_p (input_bfd, rel, |
| 2165 | local_sections, FALSE); |
| 2166 | value = score_elf_got16_entry (output_bfd, input_bfd, info, |
| 2167 | symbol + addend, forced); |
| 2168 | if (value == MINUS_ONE) |
| 2169 | return bfd_reloc_outofrange; |
| 2170 | value = score_elf_got_offset_from_index (elf_hash_table (info)->dynobj, |
| 2171 | output_bfd, input_bfd, value); |
| 2172 | } |
| 2173 | else |
| 2174 | { |
| 2175 | value = g; |
| 2176 | } |
| 2177 | |
| 2178 | if ((long) value > 0x3fff || (long) value < -0x4000) |
| 2179 | return bfd_reloc_overflow; |
| 2180 | |
| 2181 | addend = bfd_get_32 (input_bfd, hit_data); |
| 2182 | value = (addend & ~howto->dst_mask) | (value & howto->dst_mask); |
| 2183 | bfd_put_32 (input_bfd, value, hit_data); |
| 2184 | return bfd_reloc_ok; |
| 2185 | |
| 2186 | case R_SCORE_GPREL32: |
| 2187 | value = (addend + symbol + gp0 - gp); |
| 2188 | value &= howto->dst_mask; |
| 2189 | bfd_put_32 (input_bfd, value, hit_data); |
| 2190 | return bfd_reloc_ok; |
| 2191 | |
| 2192 | case R_SCORE_GOT_LO16: |
| 2193 | addend = bfd_get_32 (input_bfd, hit_data); |
| 2194 | value = (((addend >> 16) & 0x3) << 14) | ((addend & 0x7fff) >> 1); |
| 2195 | value += symbol; |
| 2196 | value = (addend & (~(howto->dst_mask))) | ((value & 0x3fff) << 1) |
| 2197 | | (((value >> 14) & 0x3) << 16); |
| 2198 | |
| 2199 | bfd_put_32 (input_bfd, value, hit_data); |
| 2200 | return bfd_reloc_ok; |
| 2201 | |
| 2202 | case R_SCORE_DUMMY_HI16: |
| 2203 | return bfd_reloc_ok; |
| 2204 | |
| 2205 | case R_SCORE_GNU_VTINHERIT: |
| 2206 | case R_SCORE_GNU_VTENTRY: |
| 2207 | /* We don't do anything with these at present. */ |
| 2208 | return bfd_reloc_continue; |
| 2209 | |
| 2210 | default: |
| 2211 | return bfd_reloc_notsupported; |
| 2212 | } |
| 2213 | } |
| 2214 | |
| 2215 | /* Score backend functions. */ |
| 2216 | |
| 2217 | bfd_boolean |
| 2218 | s7_bfd_score_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, |
| 2219 | arelent *bfd_reloc, |
| 2220 | Elf_Internal_Rela *elf_reloc) |
| 2221 | { |
| 2222 | unsigned int r_type; |
| 2223 | |
| 2224 | r_type = ELF32_R_TYPE (elf_reloc->r_info); |
| 2225 | if (r_type >= ARRAY_SIZE (elf32_score_howto_table)) |
| 2226 | return FALSE; |
| 2227 | |
| 2228 | bfd_reloc->howto = &elf32_score_howto_table[r_type]; |
| 2229 | return TRUE; |
| 2230 | } |
| 2231 | |
| 2232 | /* Relocate an score ELF section. */ |
| 2233 | |
| 2234 | bfd_boolean |
| 2235 | s7_bfd_score_elf_relocate_section (bfd *output_bfd, |
| 2236 | struct bfd_link_info *info, |
| 2237 | bfd *input_bfd, |
| 2238 | asection *input_section, |
| 2239 | bfd_byte *contents, |
| 2240 | Elf_Internal_Rela *relocs, |
| 2241 | Elf_Internal_Sym *local_syms, |
| 2242 | asection **local_sections) |
| 2243 | { |
| 2244 | Elf_Internal_Shdr *symtab_hdr; |
| 2245 | Elf_Internal_Rela *rel; |
| 2246 | Elf_Internal_Rela *relend; |
| 2247 | const char *name; |
| 2248 | unsigned long offset; |
| 2249 | unsigned long hi16_addend, hi16_offset, hi16_value, uvalue; |
| 2250 | size_t extsymoff; |
| 2251 | bfd_boolean gp_disp_p = FALSE; |
| 2252 | |
| 2253 | /* Sort dynsym. */ |
| 2254 | if (elf_hash_table (info)->dynamic_sections_created) |
| 2255 | { |
| 2256 | bfd_size_type dynsecsymcount = 0; |
| 2257 | if (bfd_link_pic (info)) |
| 2258 | { |
| 2259 | asection * p; |
| 2260 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
| 2261 | |
| 2262 | for (p = output_bfd->sections; p ; p = p->next) |
| 2263 | if ((p->flags & SEC_EXCLUDE) == 0 |
| 2264 | && (p->flags & SEC_ALLOC) != 0 |
| 2265 | && !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p)) |
| 2266 | ++ dynsecsymcount; |
| 2267 | } |
| 2268 | |
| 2269 | if (!score_elf_sort_hash_table (info, dynsecsymcount + 1)) |
| 2270 | return FALSE; |
| 2271 | } |
| 2272 | |
| 2273 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 2274 | extsymoff = (elf_bad_symtab (input_bfd)) ? 0 : symtab_hdr->sh_info; |
| 2275 | rel = relocs; |
| 2276 | relend = relocs + input_section->reloc_count; |
| 2277 | for (; rel < relend; rel++) |
| 2278 | { |
| 2279 | int r_type; |
| 2280 | reloc_howto_type *howto; |
| 2281 | unsigned long r_symndx; |
| 2282 | Elf_Internal_Sym *sym; |
| 2283 | asection *sec; |
| 2284 | struct score_elf_link_hash_entry *h; |
| 2285 | bfd_vma relocation = 0; |
| 2286 | bfd_reloc_status_type r; |
| 2287 | arelent bfd_reloc; |
| 2288 | |
| 2289 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2290 | r_type = ELF32_R_TYPE (rel->r_info); |
| 2291 | |
| 2292 | if (! s7_bfd_score_info_to_howto (input_bfd, &bfd_reloc, (Elf_Internal_Rela *) rel)) |
| 2293 | continue; |
| 2294 | howto = bfd_reloc.howto; |
| 2295 | |
| 2296 | h = NULL; |
| 2297 | sym = NULL; |
| 2298 | sec = NULL; |
| 2299 | |
| 2300 | if (r_symndx < extsymoff) |
| 2301 | { |
| 2302 | sym = local_syms + r_symndx; |
| 2303 | sec = local_sections[r_symndx]; |
| 2304 | relocation = sec->output_section->vma + sec->output_offset; |
| 2305 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); |
| 2306 | |
| 2307 | if (!bfd_link_relocatable (info)) |
| 2308 | { |
| 2309 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION |
| 2310 | || (sec->flags & SEC_MERGE)) |
| 2311 | { |
| 2312 | relocation += sym->st_value; |
| 2313 | } |
| 2314 | |
| 2315 | if ((sec->flags & SEC_MERGE) |
| 2316 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 2317 | { |
| 2318 | asection *msec; |
| 2319 | bfd_vma addend, value; |
| 2320 | |
| 2321 | switch (r_type) |
| 2322 | { |
| 2323 | case R_SCORE_HI16: |
| 2324 | break; |
| 2325 | case R_SCORE_LO16: |
| 2326 | hi16_addend = bfd_get_32 (input_bfd, contents + rel->r_offset - 4); |
| 2327 | hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1; |
| 2328 | value = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 2329 | offset = ((((value >> 16) & 0x3) << 15) | (value & 0x7fff)) >> 1; |
| 2330 | addend = (hi16_offset << 16) | (offset & 0xffff); |
| 2331 | msec = sec; |
| 2332 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend); |
| 2333 | addend -= relocation; |
| 2334 | addend += msec->output_section->vma + msec->output_offset; |
| 2335 | uvalue = addend; |
| 2336 | hi16_offset = (uvalue >> 16) << 1; |
| 2337 | hi16_value = (hi16_addend & (~(howto->dst_mask))) |
| 2338 | | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000); |
| 2339 | bfd_put_32 (input_bfd, hi16_value, contents + rel->r_offset - 4); |
| 2340 | offset = (uvalue & 0xffff) << 1; |
| 2341 | value = (value & (~(howto->dst_mask))) |
| 2342 | | (offset & 0x7fff) | ((offset << 1) & 0x30000); |
| 2343 | bfd_put_32 (input_bfd, value, contents + rel->r_offset); |
| 2344 | break; |
| 2345 | case R_SCORE_GOT_LO16: |
| 2346 | value = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 2347 | addend = (((value >> 16) & 0x3) << 14) | ((value & 0x7fff) >> 1); |
| 2348 | msec = sec; |
| 2349 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) - relocation; |
| 2350 | addend += msec->output_section->vma + msec->output_offset; |
| 2351 | value = (value & (~(howto->dst_mask))) | ((addend & 0x3fff) << 1) |
| 2352 | | (((addend >> 14) & 0x3) << 16); |
| 2353 | |
| 2354 | bfd_put_32 (input_bfd, value, contents + rel->r_offset); |
| 2355 | break; |
| 2356 | default: |
| 2357 | value = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 2358 | /* Get the (signed) value from the instruction. */ |
| 2359 | addend = value & howto->src_mask; |
| 2360 | if (addend & ((howto->src_mask + 1) >> 1)) |
| 2361 | { |
| 2362 | bfd_signed_vma mask; |
| 2363 | |
| 2364 | mask = -1; |
| 2365 | mask &= ~howto->src_mask; |
| 2366 | addend |= mask; |
| 2367 | } |
| 2368 | msec = sec; |
| 2369 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) - relocation; |
| 2370 | addend += msec->output_section->vma + msec->output_offset; |
| 2371 | value = (value & ~howto->dst_mask) | (addend & howto->dst_mask); |
| 2372 | bfd_put_32 (input_bfd, value, contents + rel->r_offset); |
| 2373 | break; |
| 2374 | } |
| 2375 | } |
| 2376 | } |
| 2377 | } |
| 2378 | else |
| 2379 | { |
| 2380 | /* For global symbols we look up the symbol in the hash-table. */ |
| 2381 | h = ((struct score_elf_link_hash_entry *) |
| 2382 | elf_sym_hashes (input_bfd) [r_symndx - extsymoff]); |
| 2383 | |
| 2384 | if (info->wrap_hash != NULL |
| 2385 | && (input_section->flags & SEC_DEBUGGING) != 0) |
| 2386 | h = ((struct score_elf_link_hash_entry *) |
| 2387 | unwrap_hash_lookup (info, input_bfd, &h->root.root)); |
| 2388 | |
| 2389 | /* Find the real hash-table entry for this symbol. */ |
| 2390 | while (h->root.root.type == bfd_link_hash_indirect |
| 2391 | || h->root.root.type == bfd_link_hash_warning) |
| 2392 | h = (struct score_elf_link_hash_entry *) h->root.root.u.i.link; |
| 2393 | |
| 2394 | /* Record the name of this symbol, for our caller. */ |
| 2395 | name = h->root.root.root.string; |
| 2396 | |
| 2397 | /* See if this is the special GP_DISP_LABEL symbol. Note that such a |
| 2398 | symbol must always be a global symbol. */ |
| 2399 | if (strcmp (name, GP_DISP_LABEL) == 0) |
| 2400 | { |
| 2401 | /* Relocations against GP_DISP_LABEL are permitted only with |
| 2402 | R_SCORE_HI16 and R_SCORE_LO16 relocations. */ |
| 2403 | if (r_type != R_SCORE_HI16 && r_type != R_SCORE_LO16) |
| 2404 | return bfd_reloc_notsupported; |
| 2405 | |
| 2406 | gp_disp_p = TRUE; |
| 2407 | } |
| 2408 | |
| 2409 | /* If this symbol is defined, calculate its address. Note that |
| 2410 | GP_DISP_LABEL is a magic symbol, always implicitly defined by the |
| 2411 | linker, so it's inappropriate to check to see whether or not |
| 2412 | its defined. */ |
| 2413 | else if ((h->root.root.type == bfd_link_hash_defined |
| 2414 | || h->root.root.type == bfd_link_hash_defweak) |
| 2415 | && h->root.root.u.def.section) |
| 2416 | { |
| 2417 | sec = h->root.root.u.def.section; |
| 2418 | if (sec->output_section) |
| 2419 | relocation = (h->root.root.u.def.value |
| 2420 | + sec->output_section->vma |
| 2421 | + sec->output_offset); |
| 2422 | else |
| 2423 | { |
| 2424 | relocation = h->root.root.u.def.value; |
| 2425 | } |
| 2426 | } |
| 2427 | else if (h->root.root.type == bfd_link_hash_undefweak) |
| 2428 | /* We allow relocations against undefined weak symbols, giving |
| 2429 | it the value zero, so that you can undefined weak functions |
| 2430 | and check to see if they exist by looking at their addresses. */ |
| 2431 | relocation = 0; |
| 2432 | else if (info->unresolved_syms_in_objects == RM_IGNORE |
| 2433 | && ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT) |
| 2434 | relocation = 0; |
| 2435 | else if (strcmp (name, "_DYNAMIC_LINK") == 0) |
| 2436 | { |
| 2437 | /* If this is a dynamic link, we should have created a _DYNAMIC_LINK symbol |
| 2438 | in s7_bfd_score_elf_create_dynamic_sections. Otherwise, we should define |
| 2439 | the symbol with a value of 0. */ |
| 2440 | BFD_ASSERT (! bfd_link_pic (info)); |
| 2441 | BFD_ASSERT (bfd_get_section_by_name (output_bfd, ".dynamic") == NULL); |
| 2442 | relocation = 0; |
| 2443 | } |
| 2444 | else if (!bfd_link_relocatable (info)) |
| 2445 | { |
| 2446 | (*info->callbacks->undefined_symbol) |
| 2447 | (info, h->root.root.root.string, input_bfd, |
| 2448 | input_section, rel->r_offset, |
| 2449 | (info->unresolved_syms_in_objects == RM_GENERATE_ERROR) |
| 2450 | || ELF_ST_VISIBILITY (h->root.other)); |
| 2451 | relocation = 0; |
| 2452 | } |
| 2453 | } |
| 2454 | |
| 2455 | if (sec != NULL && discarded_section (sec)) |
| 2456 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 2457 | rel, 1, relend, howto, 0, contents); |
| 2458 | |
| 2459 | if (bfd_link_relocatable (info)) |
| 2460 | { |
| 2461 | /* This is a relocatable link. We don't have to change |
| 2462 | anything, unless the reloc is against a section symbol, |
| 2463 | in which case we have to adjust according to where the |
| 2464 | section symbol winds up in the output section. */ |
| 2465 | if (r_symndx < symtab_hdr->sh_info) |
| 2466 | { |
| 2467 | sym = local_syms + r_symndx; |
| 2468 | |
| 2469 | if (r_type == R_SCORE_GOT15) |
| 2470 | { |
| 2471 | const Elf_Internal_Rela *lo16_rel; |
| 2472 | bfd_vma lo_addend = 0, lo_value = 0; |
| 2473 | bfd_vma addend, value; |
| 2474 | |
| 2475 | value = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 2476 | addend = value & 0x7fff; |
| 2477 | if ((addend & 0x4000) == 0x4000) |
| 2478 | addend |= 0xffffc000; |
| 2479 | |
| 2480 | relend = relocs + input_section->reloc_count; |
| 2481 | lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend); |
| 2482 | if (lo16_rel != NULL) |
| 2483 | { |
| 2484 | lo_value = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset); |
| 2485 | lo_addend = (((lo_value >> 16) & 0x3) << 14) | ((lo_value & 0x7fff) >> 1); |
| 2486 | } |
| 2487 | |
| 2488 | addend <<= 16; |
| 2489 | addend += lo_addend; |
| 2490 | |
| 2491 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 2492 | addend += local_sections[r_symndx]->output_offset; |
| 2493 | |
| 2494 | lo_addend = addend & 0xffff; |
| 2495 | lo_value = (lo_value & (~(howto->dst_mask))) | ((lo_addend & 0x3fff) << 1) |
| 2496 | | (((lo_addend >> 14) & 0x3) << 16); |
| 2497 | bfd_put_32 (input_bfd, lo_value, contents + lo16_rel->r_offset); |
| 2498 | |
| 2499 | addend = addend >> 16; |
| 2500 | value = (value & ~howto->src_mask) | (addend & howto->src_mask); |
| 2501 | bfd_put_32 (input_bfd, value, contents + rel->r_offset); |
| 2502 | } |
| 2503 | else if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 2504 | { |
| 2505 | sec = local_sections[r_symndx]; |
| 2506 | score_elf_add_to_rel (input_bfd, contents + rel->r_offset, |
| 2507 | howto, (bfd_signed_vma) (sec->output_offset + sym->st_value)); |
| 2508 | } |
| 2509 | } |
| 2510 | continue; |
| 2511 | } |
| 2512 | |
| 2513 | /* This is a final link. */ |
| 2514 | r = score_elf_final_link_relocate (howto, input_bfd, output_bfd, |
| 2515 | input_section, contents, rel, relocs, |
| 2516 | relocation, info, name, |
| 2517 | (h ? ELF_ST_TYPE ((unsigned int) h->root.root.type) : |
| 2518 | ELF_ST_TYPE ((unsigned int) sym->st_info)), h, local_syms, |
| 2519 | local_sections, gp_disp_p); |
| 2520 | |
| 2521 | if (r != bfd_reloc_ok) |
| 2522 | { |
| 2523 | const char *msg = (const char *)0; |
| 2524 | |
| 2525 | switch (r) |
| 2526 | { |
| 2527 | case bfd_reloc_overflow: |
| 2528 | /* If the overflowing reloc was to an undefined symbol, |
| 2529 | we have already printed one error message and there |
| 2530 | is no point complaining again. */ |
| 2531 | if (!h || h->root.root.type != bfd_link_hash_undefined) |
| 2532 | (*info->callbacks->reloc_overflow) |
| 2533 | (info, NULL, name, howto->name, (bfd_vma) 0, |
| 2534 | input_bfd, input_section, rel->r_offset); |
| 2535 | break; |
| 2536 | case bfd_reloc_undefined: |
| 2537 | (*info->callbacks->undefined_symbol) |
| 2538 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); |
| 2539 | break; |
| 2540 | |
| 2541 | case bfd_reloc_outofrange: |
| 2542 | msg = _("internal error: out of range error"); |
| 2543 | goto common_error; |
| 2544 | |
| 2545 | case bfd_reloc_notsupported: |
| 2546 | msg = _("internal error: unsupported relocation error"); |
| 2547 | goto common_error; |
| 2548 | |
| 2549 | case bfd_reloc_dangerous: |
| 2550 | msg = _("internal error: dangerous error"); |
| 2551 | goto common_error; |
| 2552 | |
| 2553 | default: |
| 2554 | msg = _("internal error: unknown error"); |
| 2555 | /* Fall through. */ |
| 2556 | |
| 2557 | common_error: |
| 2558 | (*info->callbacks->warning) (info, msg, name, input_bfd, |
| 2559 | input_section, rel->r_offset); |
| 2560 | break; |
| 2561 | } |
| 2562 | } |
| 2563 | } |
| 2564 | |
| 2565 | return TRUE; |
| 2566 | } |
| 2567 | |
| 2568 | /* Look through the relocs for a section during the first phase, and |
| 2569 | allocate space in the global offset table. */ |
| 2570 | |
| 2571 | bfd_boolean |
| 2572 | s7_bfd_score_elf_check_relocs (bfd *abfd, |
| 2573 | struct bfd_link_info *info, |
| 2574 | asection *sec, |
| 2575 | const Elf_Internal_Rela *relocs) |
| 2576 | { |
| 2577 | bfd *dynobj; |
| 2578 | Elf_Internal_Shdr *symtab_hdr; |
| 2579 | struct elf_link_hash_entry **sym_hashes; |
| 2580 | struct score_got_info *g; |
| 2581 | size_t extsymoff; |
| 2582 | const Elf_Internal_Rela *rel; |
| 2583 | const Elf_Internal_Rela *rel_end; |
| 2584 | asection *sgot; |
| 2585 | asection *sreloc; |
| 2586 | |
| 2587 | if (bfd_link_relocatable (info)) |
| 2588 | return TRUE; |
| 2589 | |
| 2590 | dynobj = elf_hash_table (info)->dynobj; |
| 2591 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 2592 | sym_hashes = elf_sym_hashes (abfd); |
| 2593 | extsymoff = (elf_bad_symtab (abfd)) ? 0 : symtab_hdr->sh_info; |
| 2594 | |
| 2595 | if (dynobj == NULL) |
| 2596 | { |
| 2597 | sgot = NULL; |
| 2598 | g = NULL; |
| 2599 | } |
| 2600 | else |
| 2601 | { |
| 2602 | sgot = score_elf_got_section (dynobj, FALSE); |
| 2603 | if (sgot == NULL) |
| 2604 | g = NULL; |
| 2605 | else |
| 2606 | { |
| 2607 | BFD_ASSERT (score_elf_section_data (sgot) != NULL); |
| 2608 | g = score_elf_section_data (sgot)->u.got_info; |
| 2609 | BFD_ASSERT (g != NULL); |
| 2610 | } |
| 2611 | } |
| 2612 | |
| 2613 | sreloc = NULL; |
| 2614 | rel_end = relocs + sec->reloc_count; |
| 2615 | for (rel = relocs; rel < rel_end; ++rel) |
| 2616 | { |
| 2617 | unsigned long r_symndx; |
| 2618 | unsigned int r_type; |
| 2619 | struct elf_link_hash_entry *h; |
| 2620 | |
| 2621 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2622 | r_type = ELF32_R_TYPE (rel->r_info); |
| 2623 | |
| 2624 | if (r_symndx < extsymoff) |
| 2625 | { |
| 2626 | h = NULL; |
| 2627 | } |
| 2628 | else if (r_symndx >= extsymoff + NUM_SHDR_ENTRIES (symtab_hdr)) |
| 2629 | { |
| 2630 | _bfd_error_handler |
| 2631 | /* xgettext:c-format */ |
| 2632 | (_("%pB: malformed reloc detected for section %pA"), abfd, sec); |
| 2633 | bfd_set_error (bfd_error_bad_value); |
| 2634 | return FALSE; |
| 2635 | } |
| 2636 | else |
| 2637 | { |
| 2638 | h = sym_hashes[r_symndx - extsymoff]; |
| 2639 | |
| 2640 | /* This may be an indirect symbol created because of a version. */ |
| 2641 | if (h != NULL) |
| 2642 | { |
| 2643 | while (h->root.type == bfd_link_hash_indirect) |
| 2644 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 2645 | } |
| 2646 | } |
| 2647 | |
| 2648 | /* Some relocs require a global offset table. */ |
| 2649 | if (dynobj == NULL || sgot == NULL) |
| 2650 | { |
| 2651 | switch (r_type) |
| 2652 | { |
| 2653 | case R_SCORE_GOT15: |
| 2654 | case R_SCORE_CALL15: |
| 2655 | if (dynobj == NULL) |
| 2656 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 2657 | if (!score_elf_create_got_section (dynobj, info, FALSE)) |
| 2658 | return FALSE; |
| 2659 | g = score_elf_got_info (dynobj, &sgot); |
| 2660 | break; |
| 2661 | case R_SCORE_ABS32: |
| 2662 | case R_SCORE_REL32: |
| 2663 | if (dynobj == NULL |
| 2664 | && (bfd_link_pic (info) || h != NULL) |
| 2665 | && (sec->flags & SEC_ALLOC) != 0) |
| 2666 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 2667 | break; |
| 2668 | default: |
| 2669 | break; |
| 2670 | } |
| 2671 | } |
| 2672 | |
| 2673 | if (!h && (r_type == R_SCORE_GOT_LO16)) |
| 2674 | { |
| 2675 | if (! score_elf_record_local_got_symbol (abfd, r_symndx, rel->r_addend, g)) |
| 2676 | return FALSE; |
| 2677 | } |
| 2678 | |
| 2679 | switch (r_type) |
| 2680 | { |
| 2681 | case R_SCORE_CALL15: |
| 2682 | if (h == NULL) |
| 2683 | { |
| 2684 | _bfd_error_handler |
| 2685 | /* xgettext:c-format */ |
| 2686 | (_("%pB: CALL15 reloc at %#" PRIx64 " not against global symbol"), |
| 2687 | abfd, (uint64_t) rel->r_offset); |
| 2688 | bfd_set_error (bfd_error_bad_value); |
| 2689 | return FALSE; |
| 2690 | } |
| 2691 | else |
| 2692 | { |
| 2693 | /* This symbol requires a global offset table entry. */ |
| 2694 | if (! score_elf_record_global_got_symbol (h, abfd, info, g)) |
| 2695 | return FALSE; |
| 2696 | |
| 2697 | /* We need a stub, not a plt entry for the undefined function. But we record |
| 2698 | it as if it needs plt. See _bfd_elf_adjust_dynamic_symbol. */ |
| 2699 | h->needs_plt = 1; |
| 2700 | h->type = STT_FUNC; |
| 2701 | } |
| 2702 | break; |
| 2703 | case R_SCORE_GOT15: |
| 2704 | if (h && ! score_elf_record_global_got_symbol (h, abfd, info, g)) |
| 2705 | return FALSE; |
| 2706 | break; |
| 2707 | case R_SCORE_ABS32: |
| 2708 | case R_SCORE_REL32: |
| 2709 | if ((bfd_link_pic (info) || h != NULL) |
| 2710 | && (sec->flags & SEC_ALLOC) != 0) |
| 2711 | { |
| 2712 | if (sreloc == NULL) |
| 2713 | { |
| 2714 | sreloc = score_elf_rel_dyn_section (dynobj, TRUE); |
| 2715 | if (sreloc == NULL) |
| 2716 | return FALSE; |
| 2717 | } |
| 2718 | #define SCORE_READONLY_SECTION (SEC_ALLOC | SEC_LOAD | SEC_READONLY) |
| 2719 | if (bfd_link_pic (info)) |
| 2720 | { |
| 2721 | /* When creating a shared object, we must copy these reloc types into |
| 2722 | the output file as R_SCORE_REL32 relocs. We make room for this reloc |
| 2723 | in the .rel.dyn reloc section. */ |
| 2724 | score_elf_allocate_dynamic_relocations (dynobj, 1); |
| 2725 | if ((sec->flags & SCORE_READONLY_SECTION) |
| 2726 | == SCORE_READONLY_SECTION) |
| 2727 | /* We tell the dynamic linker that there are |
| 2728 | relocations against the text segment. */ |
| 2729 | info->flags |= DF_TEXTREL; |
| 2730 | } |
| 2731 | else |
| 2732 | { |
| 2733 | struct score_elf_link_hash_entry *hscore; |
| 2734 | |
| 2735 | /* We only need to copy this reloc if the symbol is |
| 2736 | defined in a dynamic object. */ |
| 2737 | hscore = (struct score_elf_link_hash_entry *) h; |
| 2738 | ++hscore->possibly_dynamic_relocs; |
| 2739 | if ((sec->flags & SCORE_READONLY_SECTION) |
| 2740 | == SCORE_READONLY_SECTION) |
| 2741 | /* We need it to tell the dynamic linker if there |
| 2742 | are relocations against the text segment. */ |
| 2743 | hscore->readonly_reloc = TRUE; |
| 2744 | } |
| 2745 | |
| 2746 | /* Even though we don't directly need a GOT entry for this symbol, |
| 2747 | a symbol must have a dynamic symbol table index greater that |
| 2748 | DT_SCORE_GOTSYM if there are dynamic relocations against it. */ |
| 2749 | if (h != NULL) |
| 2750 | { |
| 2751 | if (dynobj == NULL) |
| 2752 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 2753 | if (! score_elf_create_got_section (dynobj, info, TRUE)) |
| 2754 | return FALSE; |
| 2755 | g = score_elf_got_info (dynobj, &sgot); |
| 2756 | if (! score_elf_record_global_got_symbol (h, abfd, info, g)) |
| 2757 | return FALSE; |
| 2758 | } |
| 2759 | } |
| 2760 | break; |
| 2761 | |
| 2762 | /* This relocation describes the C++ object vtable hierarchy. |
| 2763 | Reconstruct it for later use during GC. */ |
| 2764 | case R_SCORE_GNU_VTINHERIT: |
| 2765 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 2766 | return FALSE; |
| 2767 | break; |
| 2768 | |
| 2769 | /* This relocation describes which C++ vtable entries are actually |
| 2770 | used. Record for later use during GC. */ |
| 2771 | case R_SCORE_GNU_VTENTRY: |
| 2772 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
| 2773 | return FALSE; |
| 2774 | break; |
| 2775 | default: |
| 2776 | break; |
| 2777 | } |
| 2778 | |
| 2779 | /* We must not create a stub for a symbol that has relocations |
| 2780 | related to taking the function's address. */ |
| 2781 | switch (r_type) |
| 2782 | { |
| 2783 | default: |
| 2784 | if (h != NULL) |
| 2785 | { |
| 2786 | struct score_elf_link_hash_entry *sh; |
| 2787 | |
| 2788 | sh = (struct score_elf_link_hash_entry *) h; |
| 2789 | sh->no_fn_stub = TRUE; |
| 2790 | } |
| 2791 | break; |
| 2792 | case R_SCORE_CALL15: |
| 2793 | break; |
| 2794 | } |
| 2795 | } |
| 2796 | |
| 2797 | return TRUE; |
| 2798 | } |
| 2799 | |
| 2800 | bfd_boolean |
| 2801 | s7_bfd_score_elf_add_symbol_hook (bfd *abfd, |
| 2802 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 2803 | Elf_Internal_Sym *sym, |
| 2804 | const char **namep ATTRIBUTE_UNUSED, |
| 2805 | flagword *flagsp ATTRIBUTE_UNUSED, |
| 2806 | asection **secp, |
| 2807 | bfd_vma *valp) |
| 2808 | { |
| 2809 | switch (sym->st_shndx) |
| 2810 | { |
| 2811 | case SHN_COMMON: |
| 2812 | if (sym->st_size > elf_gp_size (abfd)) |
| 2813 | break; |
| 2814 | /* Fall through. */ |
| 2815 | case SHN_SCORE_SCOMMON: |
| 2816 | *secp = bfd_make_section_old_way (abfd, ".scommon"); |
| 2817 | (*secp)->flags |= SEC_IS_COMMON; |
| 2818 | *valp = sym->st_size; |
| 2819 | break; |
| 2820 | } |
| 2821 | |
| 2822 | return TRUE; |
| 2823 | } |
| 2824 | |
| 2825 | void |
| 2826 | s7_bfd_score_elf_symbol_processing (bfd *abfd, asymbol *asym) |
| 2827 | { |
| 2828 | elf_symbol_type *elfsym; |
| 2829 | |
| 2830 | elfsym = (elf_symbol_type *) asym; |
| 2831 | switch (elfsym->internal_elf_sym.st_shndx) |
| 2832 | { |
| 2833 | case SHN_COMMON: |
| 2834 | if (asym->value > elf_gp_size (abfd)) |
| 2835 | break; |
| 2836 | /* Fall through. */ |
| 2837 | case SHN_SCORE_SCOMMON: |
| 2838 | if (score_elf_scom_section.name == NULL) |
| 2839 | { |
| 2840 | /* Initialize the small common section. */ |
| 2841 | score_elf_scom_section.name = ".scommon"; |
| 2842 | score_elf_scom_section.flags = SEC_IS_COMMON; |
| 2843 | score_elf_scom_section.output_section = &score_elf_scom_section; |
| 2844 | score_elf_scom_section.symbol = &score_elf_scom_symbol; |
| 2845 | score_elf_scom_section.symbol_ptr_ptr = &score_elf_scom_symbol_ptr; |
| 2846 | score_elf_scom_symbol.name = ".scommon"; |
| 2847 | score_elf_scom_symbol.flags = BSF_SECTION_SYM; |
| 2848 | score_elf_scom_symbol.section = &score_elf_scom_section; |
| 2849 | score_elf_scom_symbol_ptr = &score_elf_scom_symbol; |
| 2850 | } |
| 2851 | asym->section = &score_elf_scom_section; |
| 2852 | asym->value = elfsym->internal_elf_sym.st_size; |
| 2853 | break; |
| 2854 | } |
| 2855 | } |
| 2856 | |
| 2857 | int |
| 2858 | s7_bfd_score_elf_link_output_symbol_hook (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 2859 | const char *name ATTRIBUTE_UNUSED, |
| 2860 | Elf_Internal_Sym *sym, |
| 2861 | asection *input_sec, |
| 2862 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED) |
| 2863 | { |
| 2864 | /* If we see a common symbol, which implies a relocatable link, then |
| 2865 | if a symbol was small common in an input file, mark it as small |
| 2866 | common in the output file. */ |
| 2867 | if (sym->st_shndx == SHN_COMMON && strcmp (input_sec->name, ".scommon") == 0) |
| 2868 | sym->st_shndx = SHN_SCORE_SCOMMON; |
| 2869 | |
| 2870 | return 1; |
| 2871 | } |
| 2872 | |
| 2873 | bfd_boolean |
| 2874 | s7_bfd_score_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
| 2875 | asection *sec, |
| 2876 | int *retval) |
| 2877 | { |
| 2878 | if (strcmp (bfd_section_name (sec), ".scommon") == 0) |
| 2879 | { |
| 2880 | *retval = SHN_SCORE_SCOMMON; |
| 2881 | return TRUE; |
| 2882 | } |
| 2883 | |
| 2884 | return FALSE; |
| 2885 | } |
| 2886 | |
| 2887 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 2888 | regular object. The current definition is in some section of the |
| 2889 | dynamic object, but we're not including those sections. We have to |
| 2890 | change the definition to something the rest of the link can understand. */ |
| 2891 | |
| 2892 | bfd_boolean |
| 2893 | s7_bfd_score_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 2894 | struct elf_link_hash_entry *h) |
| 2895 | { |
| 2896 | bfd *dynobj; |
| 2897 | struct score_elf_link_hash_entry *hscore; |
| 2898 | asection *s; |
| 2899 | |
| 2900 | dynobj = elf_hash_table (info)->dynobj; |
| 2901 | |
| 2902 | /* Make sure we know what is going on here. */ |
| 2903 | BFD_ASSERT (dynobj != NULL |
| 2904 | && (h->needs_plt |
| 2905 | || h->is_weakalias |
| 2906 | || (h->def_dynamic && h->ref_regular && !h->def_regular))); |
| 2907 | |
| 2908 | /* If this symbol is defined in a dynamic object, we need to copy |
| 2909 | any R_SCORE_ABS32 or R_SCORE_REL32 relocs against it into the output |
| 2910 | file. */ |
| 2911 | hscore = (struct score_elf_link_hash_entry *) h; |
| 2912 | if (!bfd_link_relocatable (info) |
| 2913 | && hscore->possibly_dynamic_relocs != 0 |
| 2914 | && (h->root.type == bfd_link_hash_defweak || !h->def_regular)) |
| 2915 | { |
| 2916 | score_elf_allocate_dynamic_relocations (dynobj, hscore->possibly_dynamic_relocs); |
| 2917 | if (hscore->readonly_reloc) |
| 2918 | /* We tell the dynamic linker that there are relocations |
| 2919 | against the text segment. */ |
| 2920 | info->flags |= DF_TEXTREL; |
| 2921 | } |
| 2922 | |
| 2923 | /* For a function, create a stub, if allowed. */ |
| 2924 | if (!hscore->no_fn_stub && h->needs_plt) |
| 2925 | { |
| 2926 | if (!elf_hash_table (info)->dynamic_sections_created) |
| 2927 | return TRUE; |
| 2928 | |
| 2929 | /* If this symbol is not defined in a regular file, then set |
| 2930 | the symbol to the stub location. This is required to make |
| 2931 | function pointers compare as equal between the normal |
| 2932 | executable and the shared library. */ |
| 2933 | if (!h->def_regular) |
| 2934 | { |
| 2935 | /* We need .stub section. */ |
| 2936 | s = bfd_get_linker_section (dynobj, SCORE_ELF_STUB_SECTION_NAME); |
| 2937 | BFD_ASSERT (s != NULL); |
| 2938 | |
| 2939 | h->root.u.def.section = s; |
| 2940 | h->root.u.def.value = s->size; |
| 2941 | |
| 2942 | /* XXX Write this stub address somewhere. */ |
| 2943 | h->plt.offset = s->size; |
| 2944 | |
| 2945 | /* Make room for this stub code. */ |
| 2946 | s->size += SCORE_FUNCTION_STUB_SIZE; |
| 2947 | |
| 2948 | /* The last half word of the stub will be filled with the index |
| 2949 | of this symbol in .dynsym section. */ |
| 2950 | return TRUE; |
| 2951 | } |
| 2952 | } |
| 2953 | else if ((h->type == STT_FUNC) && !h->needs_plt) |
| 2954 | { |
| 2955 | /* This will set the entry for this symbol in the GOT to 0, and |
| 2956 | the dynamic linker will take care of this. */ |
| 2957 | h->root.u.def.value = 0; |
| 2958 | return TRUE; |
| 2959 | } |
| 2960 | |
| 2961 | /* If this is a weak symbol, and there is a real definition, the |
| 2962 | processor independent code will have arranged for us to see the |
| 2963 | real definition first, and we can just use the same value. */ |
| 2964 | if (h->is_weakalias) |
| 2965 | { |
| 2966 | struct elf_link_hash_entry *def = weakdef (h); |
| 2967 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
| 2968 | h->root.u.def.section = def->root.u.def.section; |
| 2969 | h->root.u.def.value = def->root.u.def.value; |
| 2970 | return TRUE; |
| 2971 | } |
| 2972 | |
| 2973 | /* This is a reference to a symbol defined by a dynamic object which |
| 2974 | is not a function. */ |
| 2975 | return TRUE; |
| 2976 | } |
| 2977 | |
| 2978 | /* This function is called after all the input files have been read, |
| 2979 | and the input sections have been assigned to output sections. */ |
| 2980 | |
| 2981 | bfd_boolean |
| 2982 | s7_bfd_score_elf_always_size_sections (bfd *output_bfd, |
| 2983 | struct bfd_link_info *info) |
| 2984 | { |
| 2985 | bfd *dynobj; |
| 2986 | asection *s; |
| 2987 | struct score_got_info *g; |
| 2988 | int i; |
| 2989 | bfd_size_type loadable_size = 0; |
| 2990 | bfd_size_type local_gotno; |
| 2991 | bfd *sub; |
| 2992 | |
| 2993 | dynobj = elf_hash_table (info)->dynobj; |
| 2994 | if (dynobj == NULL) |
| 2995 | /* Relocatable links don't have it. */ |
| 2996 | return TRUE; |
| 2997 | |
| 2998 | g = score_elf_got_info (dynobj, &s); |
| 2999 | if (s == NULL) |
| 3000 | return TRUE; |
| 3001 | |
| 3002 | /* Calculate the total loadable size of the output. That will give us the |
| 3003 | maximum number of GOT_PAGE entries required. */ |
| 3004 | for (sub = info->input_bfds; sub; sub = sub->link.next) |
| 3005 | { |
| 3006 | asection *subsection; |
| 3007 | |
| 3008 | for (subsection = sub->sections; |
| 3009 | subsection; |
| 3010 | subsection = subsection->next) |
| 3011 | { |
| 3012 | if ((subsection->flags & SEC_ALLOC) == 0) |
| 3013 | continue; |
| 3014 | loadable_size += ((subsection->size + 0xf) |
| 3015 | &~ (bfd_size_type) 0xf); |
| 3016 | } |
| 3017 | } |
| 3018 | |
| 3019 | /* There has to be a global GOT entry for every symbol with |
| 3020 | a dynamic symbol table index of DT_SCORE_GOTSYM or |
| 3021 | higher. Therefore, it make sense to put those symbols |
| 3022 | that need GOT entries at the end of the symbol table. We |
| 3023 | do that here. */ |
| 3024 | if (! score_elf_sort_hash_table (info, 1)) |
| 3025 | return FALSE; |
| 3026 | |
| 3027 | if (g->global_gotsym != NULL) |
| 3028 | i = elf_hash_table (info)->dynsymcount - g->global_gotsym->dynindx; |
| 3029 | else |
| 3030 | /* If there are no global symbols, or none requiring |
| 3031 | relocations, then GLOBAL_GOTSYM will be NULL. */ |
| 3032 | i = 0; |
| 3033 | |
| 3034 | /* In the worst case, we'll get one stub per dynamic symbol. */ |
| 3035 | loadable_size += SCORE_FUNCTION_STUB_SIZE * i; |
| 3036 | |
| 3037 | /* Assume there are two loadable segments consisting of |
| 3038 | contiguous sections. Is 5 enough? */ |
| 3039 | local_gotno = (loadable_size >> 16) + 5; |
| 3040 | |
| 3041 | g->local_gotno += local_gotno; |
| 3042 | s->size += g->local_gotno * SCORE_ELF_GOT_SIZE (output_bfd); |
| 3043 | |
| 3044 | g->global_gotno = i; |
| 3045 | s->size += i * SCORE_ELF_GOT_SIZE (output_bfd); |
| 3046 | |
| 3047 | score_elf_resolve_final_got_entries (g); |
| 3048 | |
| 3049 | if (s->size > SCORE_ELF_GOT_MAX_SIZE (output_bfd)) |
| 3050 | { |
| 3051 | /* Fixme. Error message or Warning message should be issued here. */ |
| 3052 | } |
| 3053 | |
| 3054 | return TRUE; |
| 3055 | } |
| 3056 | |
| 3057 | /* Set the sizes of the dynamic sections. */ |
| 3058 | |
| 3059 | bfd_boolean |
| 3060 | s7_bfd_score_elf_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
| 3061 | { |
| 3062 | bfd *dynobj; |
| 3063 | asection *s; |
| 3064 | bfd_boolean reltext; |
| 3065 | |
| 3066 | dynobj = elf_hash_table (info)->dynobj; |
| 3067 | BFD_ASSERT (dynobj != NULL); |
| 3068 | |
| 3069 | if (elf_hash_table (info)->dynamic_sections_created) |
| 3070 | { |
| 3071 | /* Set the contents of the .interp section to the interpreter. */ |
| 3072 | if (bfd_link_executable (info) && !info->nointerp) |
| 3073 | { |
| 3074 | s = bfd_get_linker_section (dynobj, ".interp"); |
| 3075 | BFD_ASSERT (s != NULL); |
| 3076 | s->size = strlen (ELF_DYNAMIC_INTERPRETER) + 1; |
| 3077 | s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER; |
| 3078 | } |
| 3079 | } |
| 3080 | |
| 3081 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 3082 | determined the sizes of the various dynamic sections. Allocate |
| 3083 | memory for them. */ |
| 3084 | reltext = FALSE; |
| 3085 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 3086 | { |
| 3087 | const char *name; |
| 3088 | |
| 3089 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 3090 | continue; |
| 3091 | |
| 3092 | /* It's OK to base decisions on the section name, because none |
| 3093 | of the dynobj section names depend upon the input files. */ |
| 3094 | name = bfd_section_name (s); |
| 3095 | |
| 3096 | if (CONST_STRNEQ (name, ".rel")) |
| 3097 | { |
| 3098 | if (s->size == 0) |
| 3099 | { |
| 3100 | /* We only strip the section if the output section name |
| 3101 | has the same name. Otherwise, there might be several |
| 3102 | input sections for this output section. FIXME: This |
| 3103 | code is probably not needed these days anyhow, since |
| 3104 | the linker now does not create empty output sections. */ |
| 3105 | if (s->output_section != NULL |
| 3106 | && strcmp (name, |
| 3107 | bfd_section_name (s->output_section)) == 0) |
| 3108 | s->flags |= SEC_EXCLUDE; |
| 3109 | } |
| 3110 | else |
| 3111 | { |
| 3112 | const char *outname; |
| 3113 | asection *target; |
| 3114 | |
| 3115 | /* If this relocation section applies to a read only |
| 3116 | section, then we probably need a DT_TEXTREL entry. |
| 3117 | If the relocation section is .rel.dyn, we always |
| 3118 | assert a DT_TEXTREL entry rather than testing whether |
| 3119 | there exists a relocation to a read only section or |
| 3120 | not. */ |
| 3121 | outname = bfd_section_name (s->output_section); |
| 3122 | target = bfd_get_section_by_name (output_bfd, outname + 4); |
| 3123 | if ((target != NULL |
| 3124 | && (target->flags & SEC_READONLY) != 0 |
| 3125 | && (target->flags & SEC_ALLOC) != 0) || strcmp (outname, ".rel.dyn") == 0) |
| 3126 | reltext = TRUE; |
| 3127 | |
| 3128 | /* We use the reloc_count field as a counter if we need |
| 3129 | to copy relocs into the output file. */ |
| 3130 | if (strcmp (name, ".rel.dyn") != 0) |
| 3131 | s->reloc_count = 0; |
| 3132 | } |
| 3133 | } |
| 3134 | else if (CONST_STRNEQ (name, ".got")) |
| 3135 | { |
| 3136 | /* s7_bfd_score_elf_always_size_sections() has already done |
| 3137 | most of the work, but some symbols may have been mapped |
| 3138 | to versions that we must now resolve in the got_entries |
| 3139 | hash tables. */ |
| 3140 | } |
| 3141 | else if (strcmp (name, SCORE_ELF_STUB_SECTION_NAME) == 0) |
| 3142 | { |
| 3143 | /* IRIX rld assumes that the function stub isn't at the end |
| 3144 | of .text section. So put a dummy. XXX */ |
| 3145 | s->size += SCORE_FUNCTION_STUB_SIZE; |
| 3146 | } |
| 3147 | else if (! CONST_STRNEQ (name, ".init")) |
| 3148 | { |
| 3149 | /* It's not one of our sections, so don't allocate space. */ |
| 3150 | continue; |
| 3151 | } |
| 3152 | |
| 3153 | /* Allocate memory for the section contents. */ |
| 3154 | s->contents = bfd_zalloc (dynobj, s->size); |
| 3155 | if (s->contents == NULL && s->size != 0) |
| 3156 | { |
| 3157 | bfd_set_error (bfd_error_no_memory); |
| 3158 | return FALSE; |
| 3159 | } |
| 3160 | } |
| 3161 | |
| 3162 | if (elf_hash_table (info)->dynamic_sections_created) |
| 3163 | { |
| 3164 | /* Add some entries to the .dynamic section. We fill in the |
| 3165 | values later, in s7_bfd_score_elf_finish_dynamic_sections, but we |
| 3166 | must add the entries now so that we get the correct size for |
| 3167 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 3168 | dynamic linker and used by the debugger. */ |
| 3169 | |
| 3170 | if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_DEBUG, 0)) |
| 3171 | return FALSE; |
| 3172 | |
| 3173 | if (reltext) |
| 3174 | info->flags |= DF_TEXTREL; |
| 3175 | |
| 3176 | if ((info->flags & DF_TEXTREL) != 0) |
| 3177 | { |
| 3178 | if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_TEXTREL, 0)) |
| 3179 | return FALSE; |
| 3180 | } |
| 3181 | |
| 3182 | if (! SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_PLTGOT, 0)) |
| 3183 | return FALSE; |
| 3184 | |
| 3185 | if (score_elf_rel_dyn_section (dynobj, FALSE)) |
| 3186 | { |
| 3187 | if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_REL, 0)) |
| 3188 | return FALSE; |
| 3189 | |
| 3190 | if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELSZ, 0)) |
| 3191 | return FALSE; |
| 3192 | |
| 3193 | if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELENT, 0)) |
| 3194 | return FALSE; |
| 3195 | } |
| 3196 | |
| 3197 | if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_BASE_ADDRESS, 0)) |
| 3198 | return FALSE; |
| 3199 | |
| 3200 | if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_LOCAL_GOTNO, 0)) |
| 3201 | return FALSE; |
| 3202 | |
| 3203 | if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_SYMTABNO, 0)) |
| 3204 | return FALSE; |
| 3205 | |
| 3206 | if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_UNREFEXTNO, 0)) |
| 3207 | return FALSE; |
| 3208 | |
| 3209 | if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_GOTSYM, 0)) |
| 3210 | return FALSE; |
| 3211 | |
| 3212 | if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_HIPAGENO, 0)) |
| 3213 | return FALSE; |
| 3214 | } |
| 3215 | |
| 3216 | return TRUE; |
| 3217 | } |
| 3218 | |
| 3219 | bfd_boolean |
| 3220 | s7_bfd_score_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
| 3221 | { |
| 3222 | struct elf_link_hash_entry *h; |
| 3223 | struct bfd_link_hash_entry *bh; |
| 3224 | flagword flags; |
| 3225 | asection *s; |
| 3226 | |
| 3227 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 3228 | | SEC_LINKER_CREATED | SEC_READONLY); |
| 3229 | |
| 3230 | /* ABI requests the .dynamic section to be read only. */ |
| 3231 | s = bfd_get_linker_section (abfd, ".dynamic"); |
| 3232 | if (s != NULL) |
| 3233 | { |
| 3234 | if (!bfd_set_section_flags (s, flags)) |
| 3235 | return FALSE; |
| 3236 | } |
| 3237 | |
| 3238 | /* We need to create .got section. */ |
| 3239 | if (!score_elf_create_got_section (abfd, info, FALSE)) |
| 3240 | return FALSE; |
| 3241 | |
| 3242 | if (!score_elf_rel_dyn_section (elf_hash_table (info)->dynobj, TRUE)) |
| 3243 | return FALSE; |
| 3244 | |
| 3245 | /* Create .stub section. */ |
| 3246 | if (bfd_get_linker_section (abfd, SCORE_ELF_STUB_SECTION_NAME) == NULL) |
| 3247 | { |
| 3248 | s = bfd_make_section_anyway_with_flags (abfd, SCORE_ELF_STUB_SECTION_NAME, |
| 3249 | flags | SEC_CODE); |
| 3250 | if (s == NULL |
| 3251 | || !bfd_set_section_alignment (s, 2)) |
| 3252 | |
| 3253 | return FALSE; |
| 3254 | } |
| 3255 | |
| 3256 | if (!bfd_link_pic (info)) |
| 3257 | { |
| 3258 | const char *name; |
| 3259 | |
| 3260 | name = "_DYNAMIC_LINK"; |
| 3261 | bh = NULL; |
| 3262 | if (!(_bfd_generic_link_add_one_symbol |
| 3263 | (info, abfd, name, BSF_GLOBAL, bfd_abs_section_ptr, |
| 3264 | (bfd_vma) 0, NULL, FALSE, get_elf_backend_data (abfd)->collect, &bh))) |
| 3265 | return FALSE; |
| 3266 | |
| 3267 | h = (struct elf_link_hash_entry *) bh; |
| 3268 | h->non_elf = 0; |
| 3269 | h->def_regular = 1; |
| 3270 | h->type = STT_SECTION; |
| 3271 | |
| 3272 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
| 3273 | return FALSE; |
| 3274 | } |
| 3275 | |
| 3276 | return TRUE; |
| 3277 | } |
| 3278 | |
| 3279 | |
| 3280 | /* Finish up dynamic symbol handling. We set the contents of various |
| 3281 | dynamic sections here. */ |
| 3282 | |
| 3283 | bfd_boolean |
| 3284 | s7_bfd_score_elf_finish_dynamic_symbol (bfd *output_bfd, |
| 3285 | struct bfd_link_info *info, |
| 3286 | struct elf_link_hash_entry *h, |
| 3287 | Elf_Internal_Sym *sym) |
| 3288 | { |
| 3289 | bfd *dynobj; |
| 3290 | asection *sgot; |
| 3291 | struct score_got_info *g; |
| 3292 | const char *name; |
| 3293 | |
| 3294 | dynobj = elf_hash_table (info)->dynobj; |
| 3295 | |
| 3296 | if (h->plt.offset != MINUS_ONE) |
| 3297 | { |
| 3298 | asection *s; |
| 3299 | bfd_byte stub[SCORE_FUNCTION_STUB_SIZE]; |
| 3300 | |
| 3301 | /* This symbol has a stub. Set it up. */ |
| 3302 | BFD_ASSERT (h->dynindx != -1); |
| 3303 | |
| 3304 | s = bfd_get_linker_section (dynobj, SCORE_ELF_STUB_SECTION_NAME); |
| 3305 | BFD_ASSERT (s != NULL); |
| 3306 | |
| 3307 | /* FIXME: Can h->dynindex be more than 64K? */ |
| 3308 | if (h->dynindx & 0xffff0000) |
| 3309 | return FALSE; |
| 3310 | |
| 3311 | /* Fill the stub. */ |
| 3312 | bfd_put_32 (output_bfd, STUB_LW, stub); |
| 3313 | bfd_put_32 (output_bfd, STUB_MOVE, stub + 4); |
| 3314 | bfd_put_32 (output_bfd, STUB_LI16 | (h->dynindx << 1), stub + 8); |
| 3315 | bfd_put_32 (output_bfd, STUB_BRL, stub + 12); |
| 3316 | |
| 3317 | BFD_ASSERT (h->plt.offset <= s->size); |
| 3318 | memcpy (s->contents + h->plt.offset, stub, SCORE_FUNCTION_STUB_SIZE); |
| 3319 | |
| 3320 | /* Mark the symbol as undefined. plt.offset != -1 occurs |
| 3321 | only for the referenced symbol. */ |
| 3322 | sym->st_shndx = SHN_UNDEF; |
| 3323 | |
| 3324 | /* The run-time linker uses the st_value field of the symbol |
| 3325 | to reset the global offset table entry for this external |
| 3326 | to its stub address when unlinking a shared object. */ |
| 3327 | sym->st_value = (s->output_section->vma + s->output_offset + h->plt.offset); |
| 3328 | } |
| 3329 | |
| 3330 | BFD_ASSERT (h->dynindx != -1 || h->forced_local); |
| 3331 | |
| 3332 | sgot = score_elf_got_section (dynobj, FALSE); |
| 3333 | BFD_ASSERT (sgot != NULL); |
| 3334 | BFD_ASSERT (score_elf_section_data (sgot) != NULL); |
| 3335 | g = score_elf_section_data (sgot)->u.got_info; |
| 3336 | BFD_ASSERT (g != NULL); |
| 3337 | |
| 3338 | /* Run through the global symbol table, creating GOT entries for all |
| 3339 | the symbols that need them. */ |
| 3340 | if (g->global_gotsym != NULL && h->dynindx >= g->global_gotsym->dynindx) |
| 3341 | { |
| 3342 | bfd_vma offset; |
| 3343 | bfd_vma value; |
| 3344 | |
| 3345 | value = sym->st_value; |
| 3346 | offset = score_elf_global_got_index (dynobj, h); |
| 3347 | bfd_put_32 (output_bfd, value, sgot->contents + offset); |
| 3348 | } |
| 3349 | |
| 3350 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 3351 | name = h->root.root.string; |
| 3352 | if (h == elf_hash_table (info)->hdynamic |
| 3353 | || h == elf_hash_table (info)->hgot) |
| 3354 | sym->st_shndx = SHN_ABS; |
| 3355 | else if (strcmp (name, "_DYNAMIC_LINK") == 0) |
| 3356 | { |
| 3357 | sym->st_shndx = SHN_ABS; |
| 3358 | sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); |
| 3359 | sym->st_value = 1; |
| 3360 | } |
| 3361 | else if (strcmp (name, GP_DISP_LABEL) == 0) |
| 3362 | { |
| 3363 | sym->st_shndx = SHN_ABS; |
| 3364 | sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); |
| 3365 | sym->st_value = elf_gp (output_bfd); |
| 3366 | } |
| 3367 | |
| 3368 | return TRUE; |
| 3369 | } |
| 3370 | |
| 3371 | /* Finish up the dynamic sections. */ |
| 3372 | |
| 3373 | bfd_boolean |
| 3374 | s7_bfd_score_elf_finish_dynamic_sections (bfd *output_bfd, |
| 3375 | struct bfd_link_info *info) |
| 3376 | { |
| 3377 | bfd *dynobj; |
| 3378 | asection *sdyn; |
| 3379 | asection *sgot; |
| 3380 | asection *s; |
| 3381 | struct score_got_info *g; |
| 3382 | |
| 3383 | dynobj = elf_hash_table (info)->dynobj; |
| 3384 | |
| 3385 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 3386 | |
| 3387 | sgot = score_elf_got_section (dynobj, FALSE); |
| 3388 | if (sgot == NULL) |
| 3389 | g = NULL; |
| 3390 | else |
| 3391 | { |
| 3392 | BFD_ASSERT (score_elf_section_data (sgot) != NULL); |
| 3393 | g = score_elf_section_data (sgot)->u.got_info; |
| 3394 | BFD_ASSERT (g != NULL); |
| 3395 | } |
| 3396 | |
| 3397 | if (elf_hash_table (info)->dynamic_sections_created) |
| 3398 | { |
| 3399 | bfd_byte *b; |
| 3400 | |
| 3401 | BFD_ASSERT (sdyn != NULL); |
| 3402 | BFD_ASSERT (g != NULL); |
| 3403 | |
| 3404 | for (b = sdyn->contents; |
| 3405 | b < sdyn->contents + sdyn->size; |
| 3406 | b += SCORE_ELF_DYN_SIZE (dynobj)) |
| 3407 | { |
| 3408 | Elf_Internal_Dyn dyn; |
| 3409 | const char *name; |
| 3410 | size_t elemsize; |
| 3411 | bfd_boolean swap_out_p; |
| 3412 | |
| 3413 | /* Read in the current dynamic entry. */ |
| 3414 | (*get_elf_backend_data (dynobj)->s->swap_dyn_in) (dynobj, b, &dyn); |
| 3415 | |
| 3416 | /* Assume that we're going to modify it and write it out. */ |
| 3417 | swap_out_p = TRUE; |
| 3418 | |
| 3419 | switch (dyn.d_tag) |
| 3420 | { |
| 3421 | case DT_RELENT: |
| 3422 | dyn.d_un.d_val = SCORE_ELF_REL_SIZE (dynobj); |
| 3423 | break; |
| 3424 | |
| 3425 | case DT_STRSZ: |
| 3426 | /* Rewrite DT_STRSZ. */ |
| 3427 | dyn.d_un.d_val |
| 3428 | = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); |
| 3429 | break; |
| 3430 | |
| 3431 | case DT_PLTGOT: |
| 3432 | s = elf_hash_table (info)->sgot; |
| 3433 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 3434 | break; |
| 3435 | |
| 3436 | case DT_SCORE_BASE_ADDRESS: |
| 3437 | s = output_bfd->sections; |
| 3438 | BFD_ASSERT (s != NULL); |
| 3439 | dyn.d_un.d_ptr = s->vma & ~(bfd_vma) 0xffff; |
| 3440 | break; |
| 3441 | |
| 3442 | case DT_SCORE_LOCAL_GOTNO: |
| 3443 | dyn.d_un.d_val = g->local_gotno; |
| 3444 | break; |
| 3445 | |
| 3446 | case DT_SCORE_UNREFEXTNO: |
| 3447 | /* The index into the dynamic symbol table which is the |
| 3448 | entry of the first external symbol that is not |
| 3449 | referenced within the same object. */ |
| 3450 | dyn.d_un.d_val = bfd_count_sections (output_bfd) + 1; |
| 3451 | break; |
| 3452 | |
| 3453 | case DT_SCORE_GOTSYM: |
| 3454 | if (g->global_gotsym) |
| 3455 | { |
| 3456 | dyn.d_un.d_val = g->global_gotsym->dynindx; |
| 3457 | break; |
| 3458 | } |
| 3459 | /* In case if we don't have global got symbols we default |
| 3460 | to setting DT_SCORE_GOTSYM to the same value as |
| 3461 | DT_SCORE_SYMTABNO. */ |
| 3462 | /* Fall through. */ |
| 3463 | |
| 3464 | case DT_SCORE_SYMTABNO: |
| 3465 | name = ".dynsym"; |
| 3466 | elemsize = SCORE_ELF_SYM_SIZE (output_bfd); |
| 3467 | s = bfd_get_linker_section (dynobj, name); |
| 3468 | dyn.d_un.d_val = s->size / elemsize; |
| 3469 | break; |
| 3470 | |
| 3471 | case DT_SCORE_HIPAGENO: |
| 3472 | dyn.d_un.d_val = g->local_gotno - SCORE_RESERVED_GOTNO; |
| 3473 | break; |
| 3474 | |
| 3475 | default: |
| 3476 | swap_out_p = FALSE; |
| 3477 | break; |
| 3478 | } |
| 3479 | |
| 3480 | if (swap_out_p) |
| 3481 | (*get_elf_backend_data (dynobj)->s->swap_dyn_out) (dynobj, &dyn, b); |
| 3482 | } |
| 3483 | } |
| 3484 | |
| 3485 | /* The first entry of the global offset table will be filled at |
| 3486 | runtime. The second entry will be used by some runtime loaders. |
| 3487 | This isn't the case of IRIX rld. */ |
| 3488 | if (sgot != NULL && sgot->size > 0) |
| 3489 | { |
| 3490 | bfd_put_32 (output_bfd, 0, sgot->contents); |
| 3491 | bfd_put_32 (output_bfd, 0x80000000, sgot->contents + SCORE_ELF_GOT_SIZE (output_bfd)); |
| 3492 | } |
| 3493 | |
| 3494 | if (sgot != NULL) |
| 3495 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize |
| 3496 | = SCORE_ELF_GOT_SIZE (output_bfd); |
| 3497 | |
| 3498 | |
| 3499 | /* We need to sort the entries of the dynamic relocation section. */ |
| 3500 | s = score_elf_rel_dyn_section (dynobj, FALSE); |
| 3501 | |
| 3502 | if (s != NULL && s->size > (bfd_vma)2 * SCORE_ELF_REL_SIZE (output_bfd)) |
| 3503 | { |
| 3504 | reldyn_sorting_bfd = output_bfd; |
| 3505 | qsort ((Elf32_External_Rel *) s->contents + 1, s->reloc_count - 1, |
| 3506 | sizeof (Elf32_External_Rel), score_elf_sort_dynamic_relocs); |
| 3507 | } |
| 3508 | |
| 3509 | return TRUE; |
| 3510 | } |
| 3511 | |
| 3512 | /* This function set up the ELF section header for a BFD section in preparation for writing |
| 3513 | it out. This is where the flags and type fields are set for unusual sections. */ |
| 3514 | |
| 3515 | bfd_boolean |
| 3516 | s7_bfd_score_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
| 3517 | Elf_Internal_Shdr *hdr, |
| 3518 | asection *sec) |
| 3519 | { |
| 3520 | const char *name; |
| 3521 | |
| 3522 | name = bfd_section_name (sec); |
| 3523 | |
| 3524 | if (strcmp (name, ".got") == 0 |
| 3525 | || strcmp (name, ".srdata") == 0 |
| 3526 | || strcmp (name, ".sdata") == 0 |
| 3527 | || strcmp (name, ".sbss") == 0) |
| 3528 | hdr->sh_flags |= SHF_SCORE_GPREL; |
| 3529 | |
| 3530 | return TRUE; |
| 3531 | } |
| 3532 | |
| 3533 | /* This function do additional processing on the ELF section header before writing |
| 3534 | it out. This is used to set the flags and type fields for some sections. */ |
| 3535 | |
| 3536 | /* assign_file_positions_except_relocs() check section flag and if it is allocatable, |
| 3537 | warning message will be issued. backend_fake_section is called before |
| 3538 | assign_file_positions_except_relocs(); backend_section_processing after it. so, we |
| 3539 | modify section flag there, but not backend_fake_section. */ |
| 3540 | |
| 3541 | bfd_boolean |
| 3542 | s7_bfd_score_elf_section_processing (bfd *abfd ATTRIBUTE_UNUSED, Elf_Internal_Shdr *hdr) |
| 3543 | { |
| 3544 | if (hdr->bfd_section != NULL) |
| 3545 | { |
| 3546 | const char *name = bfd_section_name (hdr->bfd_section); |
| 3547 | |
| 3548 | if (strcmp (name, ".sdata") == 0) |
| 3549 | { |
| 3550 | hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_SCORE_GPREL; |
| 3551 | hdr->sh_type = SHT_PROGBITS; |
| 3552 | } |
| 3553 | else if (strcmp (name, ".sbss") == 0) |
| 3554 | { |
| 3555 | hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_SCORE_GPREL; |
| 3556 | hdr->sh_type = SHT_NOBITS; |
| 3557 | } |
| 3558 | else if (strcmp (name, ".srdata") == 0) |
| 3559 | { |
| 3560 | hdr->sh_flags |= SHF_ALLOC | SHF_SCORE_GPREL; |
| 3561 | hdr->sh_type = SHT_PROGBITS; |
| 3562 | } |
| 3563 | } |
| 3564 | |
| 3565 | return TRUE; |
| 3566 | } |
| 3567 | |
| 3568 | bfd_boolean |
| 3569 | s7_bfd_score_elf_write_section (bfd *output_bfd, asection *sec, bfd_byte *contents) |
| 3570 | { |
| 3571 | bfd_byte *to, *from, *end; |
| 3572 | int i; |
| 3573 | |
| 3574 | if (strcmp (sec->name, ".pdr") != 0) |
| 3575 | return FALSE; |
| 3576 | |
| 3577 | if (score_elf_section_data (sec)->u.tdata == NULL) |
| 3578 | return FALSE; |
| 3579 | |
| 3580 | to = contents; |
| 3581 | end = contents + sec->size; |
| 3582 | for (from = contents, i = 0; from < end; from += PDR_SIZE, i++) |
| 3583 | { |
| 3584 | if ((score_elf_section_data (sec)->u.tdata)[i] == 1) |
| 3585 | continue; |
| 3586 | |
| 3587 | if (to != from) |
| 3588 | memcpy (to, from, PDR_SIZE); |
| 3589 | |
| 3590 | to += PDR_SIZE; |
| 3591 | } |
| 3592 | bfd_set_section_contents (output_bfd, sec->output_section, contents, |
| 3593 | (file_ptr) sec->output_offset, sec->size); |
| 3594 | |
| 3595 | return TRUE; |
| 3596 | } |
| 3597 | |
| 3598 | /* Copy data from a SCORE ELF indirect symbol to its direct symbol, hiding the old |
| 3599 | indirect symbol. Process additional relocation information. */ |
| 3600 | |
| 3601 | void |
| 3602 | s7_bfd_score_elf_copy_indirect_symbol (struct bfd_link_info *info, |
| 3603 | struct elf_link_hash_entry *dir, |
| 3604 | struct elf_link_hash_entry *ind) |
| 3605 | { |
| 3606 | struct score_elf_link_hash_entry *dirscore, *indscore; |
| 3607 | |
| 3608 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| 3609 | |
| 3610 | if (ind->root.type != bfd_link_hash_indirect) |
| 3611 | return; |
| 3612 | |
| 3613 | dirscore = (struct score_elf_link_hash_entry *) dir; |
| 3614 | indscore = (struct score_elf_link_hash_entry *) ind; |
| 3615 | dirscore->possibly_dynamic_relocs += indscore->possibly_dynamic_relocs; |
| 3616 | |
| 3617 | if (indscore->readonly_reloc) |
| 3618 | dirscore->readonly_reloc = TRUE; |
| 3619 | |
| 3620 | if (indscore->no_fn_stub) |
| 3621 | dirscore->no_fn_stub = TRUE; |
| 3622 | } |
| 3623 | |
| 3624 | /* Remove information about discarded functions from other sections which mention them. */ |
| 3625 | |
| 3626 | bfd_boolean |
| 3627 | s7_bfd_score_elf_discard_info (bfd *abfd, |
| 3628 | struct elf_reloc_cookie *cookie, |
| 3629 | struct bfd_link_info *info) |
| 3630 | { |
| 3631 | asection *o; |
| 3632 | bfd_boolean ret = FALSE; |
| 3633 | unsigned char *tdata; |
| 3634 | size_t i, skip; |
| 3635 | |
| 3636 | o = bfd_get_section_by_name (abfd, ".pdr"); |
| 3637 | if ((!o) || (o->size == 0) || (o->size % PDR_SIZE != 0) |
| 3638 | || (o->output_section != NULL && bfd_is_abs_section (o->output_section))) |
| 3639 | return FALSE; |
| 3640 | |
| 3641 | tdata = bfd_zmalloc (o->size / PDR_SIZE); |
| 3642 | if (!tdata) |
| 3643 | return FALSE; |
| 3644 | |
| 3645 | cookie->rels = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, info->keep_memory); |
| 3646 | if (!cookie->rels) |
| 3647 | { |
| 3648 | free (tdata); |
| 3649 | return FALSE; |
| 3650 | } |
| 3651 | |
| 3652 | cookie->rel = cookie->rels; |
| 3653 | cookie->relend = cookie->rels + o->reloc_count; |
| 3654 | |
| 3655 | for (i = 0, skip = 0; i < o->size; i++) |
| 3656 | { |
| 3657 | if (bfd_elf_reloc_symbol_deleted_p (i * PDR_SIZE, cookie)) |
| 3658 | { |
| 3659 | tdata[i] = 1; |
| 3660 | skip++; |
| 3661 | } |
| 3662 | } |
| 3663 | |
| 3664 | if (skip != 0) |
| 3665 | { |
| 3666 | score_elf_section_data (o)->u.tdata = tdata; |
| 3667 | o->size -= skip * PDR_SIZE; |
| 3668 | ret = TRUE; |
| 3669 | } |
| 3670 | else |
| 3671 | free (tdata); |
| 3672 | |
| 3673 | if (!info->keep_memory) |
| 3674 | free (cookie->rels); |
| 3675 | |
| 3676 | return ret; |
| 3677 | } |
| 3678 | |
| 3679 | /* Signal that discard_info() has removed the discarded relocations for this section. */ |
| 3680 | |
| 3681 | bfd_boolean |
| 3682 | s7_bfd_score_elf_ignore_discarded_relocs (asection *sec) |
| 3683 | { |
| 3684 | if (strcmp (sec->name, ".pdr") == 0) |
| 3685 | return TRUE; |
| 3686 | return FALSE; |
| 3687 | } |
| 3688 | |
| 3689 | /* Return the section that should be marked against GC for a given |
| 3690 | relocation. */ |
| 3691 | |
| 3692 | asection * |
| 3693 | s7_bfd_score_elf_gc_mark_hook (asection *sec, |
| 3694 | struct bfd_link_info *info, |
| 3695 | Elf_Internal_Rela *rel, |
| 3696 | struct elf_link_hash_entry *h, |
| 3697 | Elf_Internal_Sym *sym) |
| 3698 | { |
| 3699 | if (h != NULL) |
| 3700 | switch (ELF32_R_TYPE (rel->r_info)) |
| 3701 | { |
| 3702 | case R_SCORE_GNU_VTINHERIT: |
| 3703 | case R_SCORE_GNU_VTENTRY: |
| 3704 | return NULL; |
| 3705 | } |
| 3706 | |
| 3707 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 3708 | } |
| 3709 | |
| 3710 | /* Support for core dump NOTE sections. */ |
| 3711 | |
| 3712 | bfd_boolean |
| 3713 | s7_bfd_score_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| 3714 | { |
| 3715 | int offset; |
| 3716 | unsigned int raw_size; |
| 3717 | |
| 3718 | switch (note->descsz) |
| 3719 | { |
| 3720 | default: |
| 3721 | return FALSE; |
| 3722 | case 272: /* Linux/Score elf_prstatus */ |
| 3723 | |
| 3724 | /* pr_cursig */ |
| 3725 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
| 3726 | |
| 3727 | /* pr_pid */ |
| 3728 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
| 3729 | |
| 3730 | /* pr_reg */ |
| 3731 | offset = 72; |
| 3732 | |
| 3733 | /* sizeof(elf_gregset_t) */ |
| 3734 | raw_size = 196; |
| 3735 | |
| 3736 | break; |
| 3737 | } |
| 3738 | |
| 3739 | /* Make a ".reg/999" section. */ |
| 3740 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", raw_size, |
| 3741 | note->descpos + offset); |
| 3742 | } |
| 3743 | |
| 3744 | bfd_boolean |
| 3745 | s7_bfd_score_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 3746 | { |
| 3747 | switch (note->descsz) |
| 3748 | { |
| 3749 | default: |
| 3750 | return FALSE; |
| 3751 | |
| 3752 | case 128: /* Linux/Score elf_prpsinfo. */ |
| 3753 | /* pr_fname */ |
| 3754 | elf_tdata (abfd)->core->program |
| 3755 | = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); |
| 3756 | |
| 3757 | /* pr_psargs */ |
| 3758 | elf_tdata (abfd)->core->command |
| 3759 | = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); |
| 3760 | break; |
| 3761 | } |
| 3762 | |
| 3763 | /* Note that for some reason, a spurious space is tacked |
| 3764 | onto the end of the args in some (at least one anyway) |
| 3765 | implementations, so strip it off if it exists. */ |
| 3766 | |
| 3767 | { |
| 3768 | char *command = elf_tdata (abfd)->core->command; |
| 3769 | int n = strlen (command); |
| 3770 | |
| 3771 | if (0 < n && command[n - 1] == ' ') |
| 3772 | command[n - 1] = '\0'; |
| 3773 | } |
| 3774 | |
| 3775 | return TRUE; |
| 3776 | } |
| 3777 | |
| 3778 | |
| 3779 | /* Score BFD functions. */ |
| 3780 | |
| 3781 | reloc_howto_type * |
| 3782 | s7_elf32_score_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code) |
| 3783 | { |
| 3784 | unsigned int i; |
| 3785 | |
| 3786 | for (i = 0; i < ARRAY_SIZE (elf32_score_reloc_map); i++) |
| 3787 | if (elf32_score_reloc_map[i].bfd_reloc_val == code) |
| 3788 | return &elf32_score_howto_table[elf32_score_reloc_map[i].elf_reloc_val]; |
| 3789 | |
| 3790 | return NULL; |
| 3791 | } |
| 3792 | |
| 3793 | bfd_boolean |
| 3794 | s7_elf32_score_print_private_bfd_data (bfd *abfd, void * ptr) |
| 3795 | { |
| 3796 | FILE *file = (FILE *) ptr; |
| 3797 | |
| 3798 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 3799 | |
| 3800 | /* Print normal ELF private data. */ |
| 3801 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 3802 | |
| 3803 | /* xgettext:c-format */ |
| 3804 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| 3805 | if (elf_elfheader (abfd)->e_flags & EF_SCORE_PIC) |
| 3806 | { |
| 3807 | fprintf (file, _(" [pic]")); |
| 3808 | } |
| 3809 | if (elf_elfheader (abfd)->e_flags & EF_SCORE_FIXDEP) |
| 3810 | { |
| 3811 | fprintf (file, _(" [fix dep]")); |
| 3812 | } |
| 3813 | fputc ('\n', file); |
| 3814 | |
| 3815 | return TRUE; |
| 3816 | } |
| 3817 | |
| 3818 | bfd_boolean |
| 3819 | s7_elf32_score_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
| 3820 | { |
| 3821 | bfd *obfd = info->output_bfd; |
| 3822 | flagword in_flags; |
| 3823 | flagword out_flags; |
| 3824 | |
| 3825 | if (!_bfd_generic_verify_endian_match (ibfd, info)) |
| 3826 | return FALSE; |
| 3827 | |
| 3828 | in_flags = elf_elfheader (ibfd)->e_flags; |
| 3829 | out_flags = elf_elfheader (obfd)->e_flags; |
| 3830 | |
| 3831 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 3832 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 3833 | return TRUE; |
| 3834 | |
| 3835 | in_flags = elf_elfheader (ibfd)->e_flags; |
| 3836 | out_flags = elf_elfheader (obfd)->e_flags; |
| 3837 | |
| 3838 | if (! elf_flags_init (obfd)) |
| 3839 | { |
| 3840 | elf_flags_init (obfd) = TRUE; |
| 3841 | elf_elfheader (obfd)->e_flags = in_flags; |
| 3842 | |
| 3843 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
| 3844 | && bfd_get_arch_info (obfd)->the_default) |
| 3845 | { |
| 3846 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); |
| 3847 | } |
| 3848 | |
| 3849 | return TRUE; |
| 3850 | } |
| 3851 | |
| 3852 | if (((in_flags & EF_SCORE_PIC) != 0) != ((out_flags & EF_SCORE_PIC) != 0)) |
| 3853 | { |
| 3854 | _bfd_error_handler (_("%pB: warning: linking PIC files with non-PIC files"), ibfd); |
| 3855 | } |
| 3856 | |
| 3857 | /* Maybe dependency fix compatibility should be checked here. */ |
| 3858 | return TRUE; |
| 3859 | } |
| 3860 | |
| 3861 | bfd_boolean |
| 3862 | s7_elf32_score_new_section_hook (bfd *abfd, asection *sec) |
| 3863 | { |
| 3864 | struct _score_elf_section_data *sdata; |
| 3865 | bfd_size_type amt = sizeof (*sdata); |
| 3866 | |
| 3867 | sdata = bfd_zalloc (abfd, amt); |
| 3868 | if (sdata == NULL) |
| 3869 | return FALSE; |
| 3870 | sec->used_by_bfd = sdata; |
| 3871 | |
| 3872 | return _bfd_elf_new_section_hook (abfd, sec); |
| 3873 | } |
| 3874 | |
| 3875 | #define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all |