| 1 | /* ADI Blackfin BFD support for 32-bit ELF. |
| 2 | Copyright 2005 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of BFD, the Binary File Descriptor library. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, |
| 19 | USA. */ |
| 20 | |
| 21 | #include "bfd.h" |
| 22 | #include "sysdep.h" |
| 23 | #include "libbfd.h" |
| 24 | #include "elf-bfd.h" |
| 25 | #include "elf/bfin.h" |
| 26 | |
| 27 | /* Handling expression relocations for blackfin. Blackfin |
| 28 | will generate relocations in an expression form with a stack. |
| 29 | A relocation such as P1.H = _typenames-4000000; |
| 30 | will generate the following relocs at offset 4: |
| 31 | 00000004 R_expst_push _typenames |
| 32 | 00000004 R_expst_const .__constant |
| 33 | 00000004 R_expst_sub .__operator |
| 34 | 00000006 R_huimm16 .__operator |
| 35 | |
| 36 | The .__constant and .__operator symbol names are fake. |
| 37 | Special case is a single relocation |
| 38 | P1.L = _typenames; generates |
| 39 | 00000002 R_luimm16 _typenames |
| 40 | |
| 41 | Thus, if you get a R_luimm16, R_huimm16, R_imm16, |
| 42 | if the stack is not empty, pop the stack and |
| 43 | put the value, else do the normal thing |
| 44 | We will currently assume that the max the stack |
| 45 | would grow to is 100. . */ |
| 46 | |
| 47 | #define RELOC_STACK_SIZE 100 |
| 48 | static bfd_vma reloc_stack[RELOC_STACK_SIZE]; |
| 49 | static unsigned int reloc_stack_tos = 0; |
| 50 | |
| 51 | #define is_reloc_stack_empty() ((reloc_stack_tos > 0) ? 0 : 1) |
| 52 | |
| 53 | static void |
| 54 | reloc_stack_push (bfd_vma value) |
| 55 | { |
| 56 | reloc_stack[reloc_stack_tos++] = value; |
| 57 | } |
| 58 | |
| 59 | static bfd_vma |
| 60 | reloc_stack_pop (void) |
| 61 | { |
| 62 | return reloc_stack[--reloc_stack_tos]; |
| 63 | } |
| 64 | |
| 65 | static bfd_vma |
| 66 | reloc_stack_operate (unsigned int oper) |
| 67 | { |
| 68 | bfd_vma value; |
| 69 | switch (oper) |
| 70 | { |
| 71 | case R_add: |
| 72 | { |
| 73 | value = |
| 74 | reloc_stack[reloc_stack_tos - 2] + reloc_stack[reloc_stack_tos - 1]; |
| 75 | reloc_stack_tos -= 2; |
| 76 | break; |
| 77 | } |
| 78 | case R_sub: |
| 79 | { |
| 80 | value = |
| 81 | reloc_stack[reloc_stack_tos - 2] - reloc_stack[reloc_stack_tos - 1]; |
| 82 | reloc_stack_tos -= 2; |
| 83 | break; |
| 84 | } |
| 85 | case R_mult: |
| 86 | { |
| 87 | value = |
| 88 | reloc_stack[reloc_stack_tos - 2] * reloc_stack[reloc_stack_tos - 1]; |
| 89 | reloc_stack_tos -= 2; |
| 90 | break; |
| 91 | } |
| 92 | case R_div: |
| 93 | { |
| 94 | if (reloc_stack[reloc_stack_tos - 1] == 0) |
| 95 | { |
| 96 | _bfd_abort (__FILE__, __LINE__, _("Division by zero. ")); |
| 97 | } |
| 98 | else |
| 99 | { |
| 100 | value = |
| 101 | reloc_stack[reloc_stack_tos - 2] / reloc_stack[reloc_stack_tos - 1]; |
| 102 | reloc_stack_tos -= 2; |
| 103 | } |
| 104 | break; |
| 105 | } |
| 106 | case R_mod: |
| 107 | { |
| 108 | value = |
| 109 | reloc_stack[reloc_stack_tos - 2] % reloc_stack[reloc_stack_tos - 1]; |
| 110 | reloc_stack_tos -= 2; |
| 111 | break; |
| 112 | } |
| 113 | case R_lshift: |
| 114 | { |
| 115 | value = |
| 116 | reloc_stack[reloc_stack_tos - 2] << reloc_stack[reloc_stack_tos - |
| 117 | 1]; |
| 118 | reloc_stack_tos -= 2; |
| 119 | break; |
| 120 | } |
| 121 | case R_rshift: |
| 122 | { |
| 123 | value = |
| 124 | reloc_stack[reloc_stack_tos - 2] >> reloc_stack[reloc_stack_tos - |
| 125 | 1]; |
| 126 | reloc_stack_tos -= 2; |
| 127 | break; |
| 128 | } |
| 129 | case R_and: |
| 130 | { |
| 131 | value = |
| 132 | reloc_stack[reloc_stack_tos - 2] & reloc_stack[reloc_stack_tos - 1]; |
| 133 | reloc_stack_tos -= 2; |
| 134 | break; |
| 135 | } |
| 136 | case R_or: |
| 137 | { |
| 138 | value = |
| 139 | reloc_stack[reloc_stack_tos - 2] | reloc_stack[reloc_stack_tos - 1]; |
| 140 | reloc_stack_tos -= 2; |
| 141 | break; |
| 142 | } |
| 143 | case R_xor: |
| 144 | { |
| 145 | value = |
| 146 | reloc_stack[reloc_stack_tos - 2] ^ reloc_stack[reloc_stack_tos - 1]; |
| 147 | reloc_stack_tos -= 2; |
| 148 | break; |
| 149 | } |
| 150 | case R_land: |
| 151 | { |
| 152 | value = reloc_stack[reloc_stack_tos - 2] |
| 153 | && reloc_stack[reloc_stack_tos - 1]; |
| 154 | reloc_stack_tos -= 2; |
| 155 | break; |
| 156 | } |
| 157 | case R_lor: |
| 158 | { |
| 159 | value = reloc_stack[reloc_stack_tos - 2] |
| 160 | || reloc_stack[reloc_stack_tos - 1]; |
| 161 | reloc_stack_tos -= 2; |
| 162 | break; |
| 163 | } |
| 164 | case R_neg: |
| 165 | { |
| 166 | value = -reloc_stack[reloc_stack_tos - 1]; |
| 167 | reloc_stack_tos--; |
| 168 | break; |
| 169 | } |
| 170 | case R_comp: |
| 171 | { |
| 172 | value = ~reloc_stack[reloc_stack_tos - 1]; |
| 173 | reloc_stack_tos -= 1; |
| 174 | break; |
| 175 | } |
| 176 | default: |
| 177 | { |
| 178 | fprintf (stderr, "bfin relocation : Internal bug\n"); |
| 179 | return 0; |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | reloc_stack_push (value); |
| 184 | |
| 185 | return value; |
| 186 | } |
| 187 | |
| 188 | /* FUNCTION : bfin_pltpc_reloc |
| 189 | ABSTRACT : TODO : figure out how to handle pltpc relocs. */ |
| 190 | static bfd_reloc_status_type |
| 191 | bfin_pltpc_reloc ( |
| 192 | bfd *abfd ATTRIBUTE_UNUSED, |
| 193 | arelent *reloc_entry ATTRIBUTE_UNUSED, |
| 194 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 195 | PTR data ATTRIBUTE_UNUSED, |
| 196 | asection *input_section ATTRIBUTE_UNUSED, |
| 197 | bfd *output_bfd ATTRIBUTE_UNUSED, |
| 198 | char **error_message ATTRIBUTE_UNUSED) |
| 199 | { |
| 200 | bfd_reloc_status_type flag = bfd_reloc_ok; |
| 201 | return flag; |
| 202 | } |
| 203 | \f |
| 204 | |
| 205 | static bfd_reloc_status_type |
| 206 | bfin_pcrel24_reloc (bfd *abfd, |
| 207 | arelent *reloc_entry, |
| 208 | asymbol *symbol, |
| 209 | PTR data, |
| 210 | asection *input_section, |
| 211 | bfd *output_bfd, |
| 212 | char **error_message ATTRIBUTE_UNUSED) |
| 213 | { |
| 214 | bfd_vma relocation; |
| 215 | bfd_size_type addr = reloc_entry->address; |
| 216 | bfd_vma output_base = 0; |
| 217 | reloc_howto_type *howto = reloc_entry->howto; |
| 218 | asection *output_section; |
| 219 | bfd_boolean relocatable = (output_bfd != NULL); |
| 220 | |
| 221 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 222 | return bfd_reloc_outofrange; |
| 223 | |
| 224 | if (!is_reloc_stack_empty ()) |
| 225 | relocation = reloc_stack_pop(); |
| 226 | else |
| 227 | { |
| 228 | if (bfd_is_und_section (symbol->section) |
| 229 | && (symbol->flags & BSF_WEAK) == 0 |
| 230 | && !relocatable) |
| 231 | return bfd_reloc_undefined; |
| 232 | |
| 233 | if (bfd_is_com_section (symbol->section)) |
| 234 | relocation = 0; |
| 235 | else |
| 236 | relocation = symbol->value; |
| 237 | |
| 238 | output_section = symbol->section->output_section; |
| 239 | |
| 240 | if (relocatable) |
| 241 | output_base = 0; |
| 242 | else |
| 243 | output_base = output_section->vma; |
| 244 | |
| 245 | if (!relocatable || !strcmp (symbol->name, symbol->section->name)) |
| 246 | relocation += output_base + symbol->section->output_offset; |
| 247 | |
| 248 | if (!relocatable && !strcmp (symbol->name, symbol->section->name)) |
| 249 | relocation += reloc_entry->addend; |
| 250 | } |
| 251 | |
| 252 | relocation -= input_section->output_section->vma + input_section->output_offset; |
| 253 | relocation -= reloc_entry->address; |
| 254 | |
| 255 | if (howto->complain_on_overflow != complain_overflow_dont) |
| 256 | { |
| 257 | bfd_reloc_status_type status; |
| 258 | status= bfd_check_overflow (howto->complain_on_overflow, |
| 259 | howto->bitsize, |
| 260 | howto->rightshift, |
| 261 | bfd_arch_bits_per_address(abfd), |
| 262 | relocation); |
| 263 | if (status != bfd_reloc_ok) |
| 264 | return status; |
| 265 | } |
| 266 | |
| 267 | /* if rightshift is 1 and the number odd, return error. */ |
| 268 | if (howto->rightshift && (relocation & 0x01)) |
| 269 | { |
| 270 | fprintf(stderr, "relocation should be even number\n"); |
| 271 | return bfd_reloc_overflow; |
| 272 | } |
| 273 | |
| 274 | relocation >>= (bfd_vma) howto->rightshift; |
| 275 | /* Shift everything up to where it's going to be used. */ |
| 276 | |
| 277 | relocation <<= (bfd_vma) howto->bitpos; |
| 278 | |
| 279 | if (relocatable) |
| 280 | { |
| 281 | reloc_entry->address += input_section->output_offset; |
| 282 | reloc_entry->addend += symbol->section->output_offset; |
| 283 | } |
| 284 | |
| 285 | { |
| 286 | short x; |
| 287 | |
| 288 | /* We are getting reloc_entry->address 2 byte off from |
| 289 | the start of instruction. Assuming absolute postion |
| 290 | of the reloc data. But, following code had been written assuming |
| 291 | reloc address is starting at begining of instruction. |
| 292 | To compensate that I have increased the value of |
| 293 | relocation by 1 (effectively 2) and used the addr -2 instead of addr. */ |
| 294 | |
| 295 | relocation += 1; |
| 296 | x = bfd_get_16 (abfd, (bfd_byte *) data + addr - 2); |
| 297 | x = (x & 0xff00) | ((relocation >> 16) & 0xff); |
| 298 | bfd_put_16 (abfd, x, (unsigned char *) data + addr - 2); |
| 299 | |
| 300 | x = bfd_get_16 (abfd, (bfd_byte *) data + addr); |
| 301 | x = relocation & 0xFFFF; |
| 302 | bfd_put_16 (abfd, x, (unsigned char *) data + addr ); |
| 303 | } |
| 304 | return bfd_reloc_ok; |
| 305 | } |
| 306 | |
| 307 | static bfd_reloc_status_type |
| 308 | bfin_push_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 309 | arelent *reloc_entry, |
| 310 | asymbol *symbol, |
| 311 | PTR data ATTRIBUTE_UNUSED, |
| 312 | asection *input_section, |
| 313 | bfd *output_bfd, |
| 314 | char **error_message ATTRIBUTE_UNUSED) |
| 315 | { |
| 316 | bfd_vma relocation; |
| 317 | bfd_vma output_base = 0; |
| 318 | asection *output_section; |
| 319 | bfd_boolean relocatable = (output_bfd != NULL); |
| 320 | |
| 321 | if (bfd_is_und_section (symbol->section) |
| 322 | && (symbol->flags & BSF_WEAK) == 0 |
| 323 | && !relocatable) |
| 324 | return bfd_reloc_undefined; |
| 325 | |
| 326 | /* Is the address of the relocation really within the section? */ |
| 327 | if (reloc_entry->address > bfd_get_section_limit(abfd, input_section)) |
| 328 | return bfd_reloc_outofrange; |
| 329 | |
| 330 | output_section = symbol->section->output_section; |
| 331 | relocation = symbol->value; |
| 332 | |
| 333 | /* Convert input-section-relative symbol value to absolute. */ |
| 334 | if (relocatable) |
| 335 | output_base = 0; |
| 336 | else |
| 337 | output_base = output_section->vma; |
| 338 | |
| 339 | if (!relocatable || !strcmp(symbol->name, symbol->section->name)) |
| 340 | relocation += output_base + symbol->section->output_offset; |
| 341 | |
| 342 | /* Add in supplied addend. */ |
| 343 | relocation += reloc_entry->addend; |
| 344 | |
| 345 | if (relocatable) |
| 346 | { |
| 347 | reloc_entry->address += input_section->output_offset; |
| 348 | reloc_entry->addend += symbol->section->output_offset; |
| 349 | } |
| 350 | |
| 351 | /* Now that we have the value, push it. */ |
| 352 | reloc_stack_push (relocation); |
| 353 | |
| 354 | return bfd_reloc_ok; |
| 355 | } |
| 356 | |
| 357 | static bfd_reloc_status_type |
| 358 | bfin_oper_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 359 | arelent *reloc_entry, |
| 360 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 361 | PTR data ATTRIBUTE_UNUSED, |
| 362 | asection *input_section, |
| 363 | bfd *output_bfd, |
| 364 | char **error_message ATTRIBUTE_UNUSED) |
| 365 | { |
| 366 | bfd_boolean relocatable = (output_bfd != NULL); |
| 367 | |
| 368 | /* Just call the operation based on the reloc_type. */ |
| 369 | reloc_stack_operate (reloc_entry->howto->type); |
| 370 | |
| 371 | if (relocatable) |
| 372 | reloc_entry->address += input_section->output_offset; |
| 373 | |
| 374 | return bfd_reloc_ok; |
| 375 | } |
| 376 | |
| 377 | static bfd_reloc_status_type |
| 378 | bfin_const_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 379 | arelent *reloc_entry, |
| 380 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 381 | PTR data ATTRIBUTE_UNUSED, |
| 382 | asection *input_section, |
| 383 | bfd *output_bfd, |
| 384 | char **error_message ATTRIBUTE_UNUSED) |
| 385 | { |
| 386 | bfd_boolean relocatable = (output_bfd != NULL); |
| 387 | |
| 388 | /* Push the addend portion of the relocation. */ |
| 389 | reloc_stack_push (reloc_entry->addend); |
| 390 | |
| 391 | if (relocatable) |
| 392 | reloc_entry->address += input_section->output_offset; |
| 393 | |
| 394 | return bfd_reloc_ok; |
| 395 | } |
| 396 | |
| 397 | static bfd_reloc_status_type |
| 398 | bfin_imm16_reloc (bfd *abfd, |
| 399 | arelent *reloc_entry, |
| 400 | asymbol *symbol, |
| 401 | PTR data, |
| 402 | asection *input_section, |
| 403 | bfd *output_bfd, |
| 404 | char **error_message ATTRIBUTE_UNUSED) |
| 405 | { |
| 406 | bfd_vma relocation, x; |
| 407 | bfd_size_type reloc_addr = reloc_entry->address; |
| 408 | bfd_vma output_base = 0; |
| 409 | reloc_howto_type *howto = reloc_entry->howto; |
| 410 | asection *output_section; |
| 411 | bfd_boolean relocatable = (output_bfd != NULL); |
| 412 | |
| 413 | /* Is the address of the relocation really within the section? */ |
| 414 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 415 | return bfd_reloc_outofrange; |
| 416 | |
| 417 | if (is_reloc_stack_empty ()) |
| 418 | { |
| 419 | if (bfd_is_und_section (symbol->section) |
| 420 | && (symbol->flags & BSF_WEAK) == 0 |
| 421 | && !relocatable) |
| 422 | return bfd_reloc_undefined; |
| 423 | |
| 424 | output_section = symbol->section->output_section; |
| 425 | relocation = symbol->value; |
| 426 | |
| 427 | /* Convert input-section-relative symbol value to absolute. */ |
| 428 | if (relocatable) |
| 429 | output_base = 0; |
| 430 | else |
| 431 | output_base = output_section->vma; |
| 432 | |
| 433 | if (!relocatable || !strcmp (symbol->name, symbol->section->name)) |
| 434 | relocation += output_base + symbol->section->output_offset; |
| 435 | |
| 436 | /* Add in supplied addend. */ |
| 437 | relocation += reloc_entry->addend; |
| 438 | } |
| 439 | else |
| 440 | { |
| 441 | relocation = reloc_stack_pop (); |
| 442 | } |
| 443 | |
| 444 | if (relocatable) |
| 445 | { |
| 446 | reloc_entry->address += input_section->output_offset; |
| 447 | reloc_entry->addend += symbol->section->output_offset; |
| 448 | } |
| 449 | else |
| 450 | { |
| 451 | reloc_entry->addend = 0; |
| 452 | } |
| 453 | |
| 454 | if (howto->complain_on_overflow != complain_overflow_dont) |
| 455 | { |
| 456 | bfd_reloc_status_type flag; |
| 457 | flag = bfd_check_overflow (howto->complain_on_overflow, |
| 458 | howto->bitsize, |
| 459 | howto->rightshift, |
| 460 | bfd_arch_bits_per_address(abfd), |
| 461 | relocation); |
| 462 | if (flag != bfd_reloc_ok) |
| 463 | return flag; |
| 464 | } |
| 465 | |
| 466 | |
| 467 | /* Here the variable relocation holds the final address of the |
| 468 | symbol we are relocating against, plus any addend. */ |
| 469 | |
| 470 | relocation >>= (bfd_vma) howto->rightshift; |
| 471 | x = relocation; |
| 472 | bfd_put_16 (abfd, x, (unsigned char *) data + reloc_addr); |
| 473 | return bfd_reloc_ok; |
| 474 | } |
| 475 | |
| 476 | |
| 477 | static bfd_reloc_status_type |
| 478 | bfin_byte4_reloc (bfd *abfd, |
| 479 | arelent *reloc_entry, |
| 480 | asymbol *symbol, |
| 481 | PTR data, |
| 482 | asection *input_section, |
| 483 | bfd *output_bfd, |
| 484 | char **error_message ATTRIBUTE_UNUSED) |
| 485 | { |
| 486 | bfd_vma relocation, x; |
| 487 | bfd_size_type addr = reloc_entry->address; |
| 488 | bfd_vma output_base = 0; |
| 489 | asection *output_section; |
| 490 | bfd_boolean relocatable = (output_bfd != NULL); |
| 491 | |
| 492 | /* Is the address of the relocation really within the section? */ |
| 493 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 494 | return bfd_reloc_outofrange; |
| 495 | |
| 496 | if (is_reloc_stack_empty ()) |
| 497 | { |
| 498 | if (bfd_is_und_section (symbol->section) |
| 499 | && (symbol->flags & BSF_WEAK) == 0 |
| 500 | && !relocatable) |
| 501 | return bfd_reloc_undefined; |
| 502 | |
| 503 | output_section = symbol->section->output_section; |
| 504 | relocation = symbol->value; |
| 505 | /* Convert input-section-relative symbol value to absolute. */ |
| 506 | if (relocatable) |
| 507 | output_base = 0; |
| 508 | else |
| 509 | output_base = output_section->vma; |
| 510 | |
| 511 | if ((symbol->name |
| 512 | && symbol->section->name |
| 513 | && !strcmp (symbol->name, symbol->section->name)) |
| 514 | || !relocatable) |
| 515 | { |
| 516 | relocation += output_base + symbol->section->output_offset; |
| 517 | } |
| 518 | |
| 519 | relocation += reloc_entry->addend; |
| 520 | } |
| 521 | else |
| 522 | { |
| 523 | relocation = reloc_stack_pop(); |
| 524 | relocation += reloc_entry->addend; |
| 525 | } |
| 526 | |
| 527 | if (relocatable) |
| 528 | { |
| 529 | /* This output will be relocatable ... like ld -r. */ |
| 530 | reloc_entry->address += input_section->output_offset; |
| 531 | reloc_entry->addend += symbol->section->output_offset; |
| 532 | } |
| 533 | else |
| 534 | { |
| 535 | reloc_entry->addend = 0; |
| 536 | } |
| 537 | |
| 538 | /* Here the variable relocation holds the final address of the |
| 539 | symbol we are relocating against, plus any addend. */ |
| 540 | x = relocation & 0xFFFF0000; |
| 541 | x >>=16; |
| 542 | bfd_put_16 (abfd, x, (unsigned char *) data + addr + 2); |
| 543 | |
| 544 | x = relocation & 0x0000FFFF; |
| 545 | bfd_put_16 (abfd, x, (unsigned char *) data + addr); |
| 546 | return bfd_reloc_ok; |
| 547 | } |
| 548 | |
| 549 | /* bfin_bfd_reloc handles the blackfin arithmetic relocations. |
| 550 | Use this instead of bfd_perform_relocation. */ |
| 551 | static bfd_reloc_status_type |
| 552 | bfin_bfd_reloc (bfd *abfd, |
| 553 | arelent *reloc_entry, |
| 554 | asymbol *symbol, |
| 555 | PTR data, |
| 556 | asection *input_section, |
| 557 | bfd *output_bfd, |
| 558 | char **error_message ATTRIBUTE_UNUSED) |
| 559 | { |
| 560 | bfd_vma relocation; |
| 561 | bfd_size_type addr = reloc_entry->address; |
| 562 | bfd_vma output_base = 0; |
| 563 | reloc_howto_type *howto = reloc_entry->howto; |
| 564 | asection *output_section; |
| 565 | bfd_boolean relocatable = (output_bfd != NULL); |
| 566 | |
| 567 | /* Is the address of the relocation really within the section? */ |
| 568 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 569 | return bfd_reloc_outofrange; |
| 570 | |
| 571 | if (is_reloc_stack_empty()) |
| 572 | { |
| 573 | if (bfd_is_und_section (symbol->section) |
| 574 | && (symbol->flags & BSF_WEAK) == 0 |
| 575 | && !relocatable) |
| 576 | return bfd_reloc_undefined; |
| 577 | |
| 578 | /* Get symbol value. (Common symbols are special.) */ |
| 579 | if (bfd_is_com_section (symbol->section)) |
| 580 | relocation = 0; |
| 581 | else |
| 582 | relocation = symbol->value; |
| 583 | |
| 584 | output_section = symbol->section->output_section; |
| 585 | |
| 586 | /* Convert input-section-relative symbol value to absolute. */ |
| 587 | if (relocatable) |
| 588 | output_base = 0; |
| 589 | else |
| 590 | output_base = output_section->vma; |
| 591 | |
| 592 | if (!relocatable || !strcmp (symbol->name, symbol->section->name)) |
| 593 | relocation += output_base + symbol->section->output_offset; |
| 594 | |
| 595 | if (!relocatable && !strcmp (symbol->name, symbol->section->name)) |
| 596 | { |
| 597 | /* Add in supplied addend. */ |
| 598 | relocation += reloc_entry->addend; |
| 599 | } |
| 600 | |
| 601 | } |
| 602 | else |
| 603 | { |
| 604 | relocation = reloc_stack_pop(); |
| 605 | } |
| 606 | |
| 607 | /* Here the variable relocation holds the final address of the |
| 608 | symbol we are relocating against, plus any addend. */ |
| 609 | |
| 610 | if (howto->pc_relative == TRUE) |
| 611 | { |
| 612 | relocation -= input_section->output_section->vma + input_section->output_offset; |
| 613 | |
| 614 | if (howto->pcrel_offset == TRUE) |
| 615 | relocation -= reloc_entry->address; |
| 616 | } |
| 617 | |
| 618 | if (relocatable) |
| 619 | { |
| 620 | reloc_entry->address += input_section->output_offset; |
| 621 | reloc_entry->addend += symbol->section->output_offset; |
| 622 | } |
| 623 | |
| 624 | if (howto->complain_on_overflow != complain_overflow_dont) |
| 625 | { |
| 626 | bfd_reloc_status_type status; |
| 627 | |
| 628 | status = bfd_check_overflow (howto->complain_on_overflow, |
| 629 | howto->bitsize, |
| 630 | howto->rightshift, |
| 631 | bfd_arch_bits_per_address(abfd), |
| 632 | relocation); |
| 633 | if (status != bfd_reloc_ok) |
| 634 | return status; |
| 635 | } |
| 636 | |
| 637 | /* If rightshift is 1 and the number odd, return error. */ |
| 638 | if (howto->rightshift && (relocation & 0x01)) |
| 639 | { |
| 640 | fprintf(stderr, "relocation should be even number\n"); |
| 641 | return bfd_reloc_overflow; |
| 642 | } |
| 643 | |
| 644 | relocation >>= (bfd_vma) howto->rightshift; |
| 645 | |
| 646 | /* Shift everything up to where it's going to be used. */ |
| 647 | |
| 648 | relocation <<= (bfd_vma) howto->bitpos; |
| 649 | |
| 650 | #define DOIT(x) \ |
| 651 | x = ( (x & ~howto->dst_mask) | (relocation & howto->dst_mask)) |
| 652 | |
| 653 | /* handle 8 and 16 bit relocations here. */ |
| 654 | switch (howto->size) |
| 655 | { |
| 656 | case 0: |
| 657 | { |
| 658 | char x = bfd_get_8 (abfd, (char *) data + addr); |
| 659 | DOIT (x); |
| 660 | bfd_put_8 (abfd, x, (unsigned char *) data + addr); |
| 661 | } |
| 662 | break; |
| 663 | |
| 664 | case 1: |
| 665 | { |
| 666 | unsigned short x = bfd_get_16 (abfd, (bfd_byte *) data + addr); |
| 667 | DOIT (x); |
| 668 | bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data + addr); |
| 669 | } |
| 670 | break; |
| 671 | |
| 672 | default: |
| 673 | return bfd_reloc_other; |
| 674 | } |
| 675 | |
| 676 | return bfd_reloc_ok; |
| 677 | } |
| 678 | |
| 679 | #if 0 |
| 680 | static bfd_reloc_status_type bfin_bfd_reloc |
| 681 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 682 | |
| 683 | static bfd_reloc_status_type bfin_imm16_reloc |
| 684 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 685 | |
| 686 | static bfd_reloc_status_type bfin_pcrel24_reloc |
| 687 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 688 | |
| 689 | static bfd_reloc_status_type bfin_pltpc_reloc |
| 690 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 691 | |
| 692 | static bfd_reloc_status_type bfin_const_reloc |
| 693 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 694 | |
| 695 | static bfd_reloc_status_type bfin_oper_reloc |
| 696 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 697 | |
| 698 | static bfd_reloc_status_type bfin_byte4_reloc |
| 699 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 700 | |
| 701 | static bfd_reloc_status_type bfin_push_reloc |
| 702 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 703 | |
| 704 | static bfd_boolean bfin_is_local_label_name |
| 705 | PARAMS ((bfd *, const char *)); |
| 706 | #endif |
| 707 | bfd_boolean bfd_bfin_elf32_create_embedded_relocs |
| 708 | PARAMS ((bfd *, struct bfd_link_info *, asection *, asection *, char **)); |
| 709 | |
| 710 | |
| 711 | /* HOWTO Table for blackfin. |
| 712 | Blackfin relocations are fairly complicated. |
| 713 | Some of the salient features are |
| 714 | a. Even numbered offsets. A number of (not all) relocations are |
| 715 | even numbered. This means that the rightmost bit is not stored. |
| 716 | Needs to right shift by 1 and check to see if value is not odd |
| 717 | b. A relocation can be an expression. An expression takes on |
| 718 | a variety of relocations arranged in a stack. |
| 719 | As a result, we cannot use the standard generic function as special |
| 720 | function. We will have our own, which is very similar to the standard |
| 721 | generic function except that it understands how to get the value from |
| 722 | the relocation stack. . */ |
| 723 | |
| 724 | #define BFIN_RELOC_MIN 0 |
| 725 | #define BFIN_RELOC_MAX 0x13 |
| 726 | #define BFIN_GNUEXT_RELOC_MIN 0x40 |
| 727 | #define BFIN_GNUEXT_RELOC_MAX 0x43 |
| 728 | #define BFIN_ARELOC_MIN 0xE0 |
| 729 | #define BFIN_ARELOC_MAX 0xF3 |
| 730 | |
| 731 | static reloc_howto_type bfin_howto_table [] = |
| 732 | { |
| 733 | /* This reloc does nothing. . */ |
| 734 | HOWTO (R_unused0, /* type. */ |
| 735 | 0, /* rightshift. */ |
| 736 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 737 | 32, /* bitsize. */ |
| 738 | FALSE, /* pc_relative. */ |
| 739 | 0, /* bitpos. */ |
| 740 | complain_overflow_bitfield, /* complain_on_overflow. */ |
| 741 | bfd_elf_generic_reloc, /* special_function. */ |
| 742 | "R_unused0", /* name. */ |
| 743 | FALSE, /* partial_inplace. */ |
| 744 | 0, /* src_mask. */ |
| 745 | 0, /* dst_mask. */ |
| 746 | FALSE), /* pcrel_offset. */ |
| 747 | |
| 748 | HOWTO (R_pcrel5m2, /* type. */ |
| 749 | 1, /* rightshift. */ |
| 750 | 1, /* size (0 = byte, 1 = short, 2 = long).. */ |
| 751 | 4, /* bitsize. */ |
| 752 | TRUE, /* pc_relative. */ |
| 753 | 0, /* bitpos. */ |
| 754 | complain_overflow_unsigned, /* complain_on_overflow. */ |
| 755 | bfin_bfd_reloc, /* special_function. */ |
| 756 | "R_pcrel5m2", /* name. */ |
| 757 | FALSE, /* partial_inplace. */ |
| 758 | 0, /* src_mask. */ |
| 759 | 0x0000000F, /* dst_mask. */ |
| 760 | FALSE), /* pcrel_offset. */ |
| 761 | |
| 762 | HOWTO (R_unused1, /* type. */ |
| 763 | 0, /* rightshift. */ |
| 764 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 765 | 32, /* bitsize. */ |
| 766 | FALSE, /* pc_relative. */ |
| 767 | 0, /* bitpos. */ |
| 768 | complain_overflow_bitfield, /* complain_on_overflow. */ |
| 769 | bfd_elf_generic_reloc, /* special_function. */ |
| 770 | "R_unused1", /* name. */ |
| 771 | FALSE, /* partial_inplace. */ |
| 772 | 0, /* src_mask. */ |
| 773 | 0, /* dst_mask. */ |
| 774 | FALSE), /* pcrel_offset. */ |
| 775 | |
| 776 | HOWTO (R_pcrel10, /* type. */ |
| 777 | 1, /* rightshift. */ |
| 778 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 779 | 10, /* bitsize. */ |
| 780 | TRUE, /* pc_relative. */ |
| 781 | 0, /* bitpos. */ |
| 782 | complain_overflow_signed, /* complain_on_overflow. */ |
| 783 | bfin_bfd_reloc, /* special_function. */ |
| 784 | "R_pcrel10", /* name. */ |
| 785 | FALSE, /* partial_inplace. */ |
| 786 | 0, /* src_mask. */ |
| 787 | 0x000003FF, /* dst_mask. */ |
| 788 | TRUE), /* pcrel_offset. */ |
| 789 | |
| 790 | HOWTO (R_pcrel12_jump, /* type. */ |
| 791 | 1, /* rightshift. */ |
| 792 | /* the offset is actually 13 bit |
| 793 | aligned on a word boundary so |
| 794 | only 12 bits have to be used. |
| 795 | Right shift the rightmost bit.. */ |
| 796 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 797 | 12, /* bitsize. */ |
| 798 | TRUE, /* pc_relative. */ |
| 799 | 0, /* bitpos. */ |
| 800 | complain_overflow_signed, /* complain_on_overflow. */ |
| 801 | bfin_bfd_reloc, /* special_function. */ |
| 802 | "R_pcrel12_jump", /* name. */ |
| 803 | FALSE, /* partial_inplace. */ |
| 804 | 0, /* src_mask. */ |
| 805 | 0x0FFF, /* dst_mask. */ |
| 806 | TRUE), /* pcrel_offset. */ |
| 807 | |
| 808 | HOWTO (R_rimm16, /* type. */ |
| 809 | 0, /* rightshift. */ |
| 810 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 811 | 16, /* bitsize. */ |
| 812 | FALSE, /* pc_relative. */ |
| 813 | 0, /* bitpos. */ |
| 814 | complain_overflow_signed, /* complain_on_overflow. */ |
| 815 | bfin_imm16_reloc, /* special_function. */ |
| 816 | "R_rimm16", /* name. */ |
| 817 | FALSE, /* partial_inplace. */ |
| 818 | 0, /* src_mask. */ |
| 819 | 0x0000FFFF, /* dst_mask. */ |
| 820 | TRUE), /* pcrel_offset. */ |
| 821 | |
| 822 | HOWTO (R_luimm16, /* type. */ |
| 823 | 0, /* rightshift. */ |
| 824 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 825 | 16, /* bitsize. */ |
| 826 | FALSE, /* pc_relative. */ |
| 827 | 0, /* bitpos. */ |
| 828 | complain_overflow_dont, /* complain_on_overflow. */ |
| 829 | bfin_imm16_reloc, /* special_function. */ |
| 830 | "R_luimm16", /* name. */ |
| 831 | FALSE, /* partial_inplace. */ |
| 832 | 0, /* src_mask. */ |
| 833 | 0x0000FFFF, /* dst_mask. */ |
| 834 | TRUE), /* pcrel_offset. */ |
| 835 | |
| 836 | HOWTO (R_huimm16, /* type. */ |
| 837 | 16, /* rightshift. */ |
| 838 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 839 | 16, /* bitsize. */ |
| 840 | FALSE, /* pc_relative. */ |
| 841 | 0, /* bitpos. */ |
| 842 | complain_overflow_unsigned, /* complain_on_overflow. */ |
| 843 | bfin_imm16_reloc, /* special_function. */ |
| 844 | "R_huimm16", /* name. */ |
| 845 | FALSE, /* partial_inplace. */ |
| 846 | 0, /* src_mask. */ |
| 847 | 0x0000FFFF, /* dst_mask. */ |
| 848 | TRUE), /* pcrel_offset. */ |
| 849 | |
| 850 | HOWTO (R_pcrel12_jump_s, /* type. */ |
| 851 | 1, /* rightshift. */ |
| 852 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 853 | 12, /* bitsize. */ |
| 854 | TRUE, /* pc_relative. */ |
| 855 | 0, /* bitpos. */ |
| 856 | complain_overflow_signed, /* complain_on_overflow. */ |
| 857 | bfin_bfd_reloc, /* special_function. */ |
| 858 | "R_pcrel12_jump_s", /* name. */ |
| 859 | FALSE, /* partial_inplace. */ |
| 860 | 0, /* src_mask. */ |
| 861 | 0x00000FFF, /* dst_mask. */ |
| 862 | TRUE), /* pcrel_offset. */ |
| 863 | |
| 864 | HOWTO (R_pcrel24_jump_x, /* type. */ |
| 865 | 1, /* rightshift. */ |
| 866 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 867 | 24, /* bitsize. */ |
| 868 | TRUE, /* pc_relative. */ |
| 869 | 0, /* bitpos. */ |
| 870 | complain_overflow_signed, /* complain_on_overflow. */ |
| 871 | bfin_pcrel24_reloc, /* special_function. */ |
| 872 | "R_pcrel24_jump_x", /* name. */ |
| 873 | FALSE, /* partial_inplace. */ |
| 874 | 0, /* src_mask. */ |
| 875 | 0x00FFFFFF, /* dst_mask. */ |
| 876 | TRUE), /* pcrel_offset. */ |
| 877 | |
| 878 | HOWTO (R_pcrel24, /* type. */ |
| 879 | 1, /* rightshift. */ |
| 880 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 881 | 24, /* bitsize. */ |
| 882 | TRUE, /* pc_relative. */ |
| 883 | 0, /* bitpos. */ |
| 884 | complain_overflow_signed, /* complain_on_overflow. */ |
| 885 | bfin_pcrel24_reloc, /* special_function. */ |
| 886 | "R_pcrel24", /* name. */ |
| 887 | FALSE, /* partial_inplace. */ |
| 888 | 0, /* src_mask. */ |
| 889 | 0x00FFFFFF, /* dst_mask. */ |
| 890 | TRUE), /* pcrel_offset. */ |
| 891 | |
| 892 | HOWTO (R_unusedb, /* type. */ |
| 893 | 0, /* rightshift. */ |
| 894 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 895 | 32, /* bitsize. */ |
| 896 | FALSE, /* pc_relative. */ |
| 897 | 0, /* bitpos. */ |
| 898 | complain_overflow_dont, /* complain_on_overflow. */ |
| 899 | bfd_elf_generic_reloc, /* special_function. */ |
| 900 | "R_unusedb", /* name. */ |
| 901 | FALSE, /* partial_inplace. */ |
| 902 | 0, /* src_mask. */ |
| 903 | 0, /* dst_mask. */ |
| 904 | FALSE), /* pcrel_offset. */ |
| 905 | |
| 906 | HOWTO (R_unusedc, /* type. */ |
| 907 | 0, /* rightshift. */ |
| 908 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 909 | 32, /* bitsize. */ |
| 910 | FALSE, /* pc_relative. */ |
| 911 | 0, /* bitpos. */ |
| 912 | complain_overflow_dont, /* complain_on_overflow. */ |
| 913 | bfd_elf_generic_reloc, /* special_function. */ |
| 914 | "R_unusedc", /* name. */ |
| 915 | FALSE, /* partial_inplace. */ |
| 916 | 0, /* src_mask. */ |
| 917 | 0, /* dst_mask. */ |
| 918 | FALSE), /* pcrel_offset. */ |
| 919 | |
| 920 | HOWTO (R_pcrel24_jump_l, /* type. */ |
| 921 | 1, /* rightshift. */ |
| 922 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 923 | 24, /* bitsize. */ |
| 924 | TRUE, /* pc_relative. */ |
| 925 | 0, /* bitpos. */ |
| 926 | complain_overflow_signed, /* complain_on_overflow. */ |
| 927 | bfin_pcrel24_reloc, /* special_function. */ |
| 928 | "R_pcrel24_jump_l", /* name. */ |
| 929 | FALSE, /* partial_inplace. */ |
| 930 | 0, /* src_mask. */ |
| 931 | 0x00FFFFFF, /* dst_mask. */ |
| 932 | TRUE), /* pcrel_offset. */ |
| 933 | |
| 934 | HOWTO (R_pcrel24_call_x, /* type. */ |
| 935 | 1, /* rightshift. */ |
| 936 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 937 | 24, /* bitsize. */ |
| 938 | TRUE, /* pc_relative. */ |
| 939 | 0, /* bitpos. */ |
| 940 | complain_overflow_signed, /* complain_on_overflow. */ |
| 941 | bfin_pcrel24_reloc, /* special_function. */ |
| 942 | "R_pcrel24_call_x", /* name. */ |
| 943 | FALSE, /* partial_inplace. */ |
| 944 | 0, /* src_mask. */ |
| 945 | 0x00FFFFFF, /* dst_mask. */ |
| 946 | TRUE), /* pcrel_offset. */ |
| 947 | |
| 948 | HOWTO (R_var_eq_symb, /* type. */ |
| 949 | 0, /* rightshift. */ |
| 950 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 951 | 32, /* bitsize. */ |
| 952 | FALSE, /* pc_relative. */ |
| 953 | 0, /* bitpos. */ |
| 954 | complain_overflow_bitfield, /* complain_on_overflow. */ |
| 955 | bfin_bfd_reloc, /* special_function. */ |
| 956 | "R_var_eq_symb", /* name. */ |
| 957 | FALSE, /* partial_inplace. */ |
| 958 | 0, /* src_mask. */ |
| 959 | 0, /* dst_mask. */ |
| 960 | FALSE), /* pcrel_offset. */ |
| 961 | |
| 962 | HOWTO (R_byte_data, /* type. */ |
| 963 | 0, /* rightshift. */ |
| 964 | 0, /* size (0 = byte, 1 = short, 2 = long). */ |
| 965 | 8, /* bitsize. */ |
| 966 | FALSE, /* pc_relative. */ |
| 967 | 0, /* bitpos. */ |
| 968 | complain_overflow_unsigned, /* complain_on_overflow. */ |
| 969 | bfin_bfd_reloc, /* special_function. */ |
| 970 | "R_byte_data", /* name. */ |
| 971 | FALSE, /* partial_inplace. */ |
| 972 | 0, /* src_mask. */ |
| 973 | 0xFF, /* dst_mask. */ |
| 974 | TRUE), /* pcrel_offset. */ |
| 975 | |
| 976 | HOWTO (R_byte2_data, /* type. */ |
| 977 | 0, /* rightshift. */ |
| 978 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 979 | 16, /* bitsize. */ |
| 980 | FALSE, /* pc_relative. */ |
| 981 | 0, /* bitpos. */ |
| 982 | complain_overflow_signed, /* complain_on_overflow. */ |
| 983 | bfin_bfd_reloc, /* special_function. */ |
| 984 | "R_byte2_data", /* name. */ |
| 985 | FALSE, /* partial_inplace. */ |
| 986 | 0, /* src_mask. */ |
| 987 | 0xFFFF, /* dst_mask. */ |
| 988 | TRUE), /* pcrel_offset. */ |
| 989 | |
| 990 | HOWTO (R_byte4_data, /* type. */ |
| 991 | 0, /* rightshift. */ |
| 992 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 993 | 32, /* bitsize. */ |
| 994 | FALSE, /* pc_relative. */ |
| 995 | 0, /* bitpos. */ |
| 996 | complain_overflow_unsigned, /* complain_on_overflow. */ |
| 997 | bfin_byte4_reloc, /* special_function. */ |
| 998 | "R_byte4_data", /* name. */ |
| 999 | FALSE, /* partial_inplace. */ |
| 1000 | 0, /* src_mask. */ |
| 1001 | 0xFFFFFFFF, /* dst_mask. */ |
| 1002 | TRUE), /* pcrel_offset. */ |
| 1003 | |
| 1004 | HOWTO (R_pcrel11, /* type. */ |
| 1005 | 1, /* rightshift. */ |
| 1006 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1007 | 10, /* bitsize. */ |
| 1008 | TRUE, /* pc_relative. */ |
| 1009 | 0, /* bitpos. */ |
| 1010 | complain_overflow_unsigned, /* complain_on_overflow. */ |
| 1011 | bfin_bfd_reloc, /* special_function. */ |
| 1012 | "R_pcrel11", /* name. */ |
| 1013 | FALSE, /* partial_inplace. */ |
| 1014 | 0, /* src_mask. */ |
| 1015 | 0x000003FF, /* dst_mask. */ |
| 1016 | FALSE), /* pcrel_offset. */ |
| 1017 | }; |
| 1018 | |
| 1019 | static reloc_howto_type bfin_areloc_howto_table [] = |
| 1020 | { |
| 1021 | HOWTO (R_push, |
| 1022 | 0, |
| 1023 | 2, |
| 1024 | 0, |
| 1025 | FALSE, |
| 1026 | 0, |
| 1027 | complain_overflow_dont, |
| 1028 | bfin_push_reloc, |
| 1029 | "R_expst_push", |
| 1030 | FALSE, |
| 1031 | 0, |
| 1032 | 0, |
| 1033 | FALSE), |
| 1034 | |
| 1035 | HOWTO (R_const, |
| 1036 | 0, |
| 1037 | 2, |
| 1038 | 0, |
| 1039 | FALSE, |
| 1040 | 0, |
| 1041 | complain_overflow_dont, |
| 1042 | bfin_const_reloc, |
| 1043 | "R_expst_const", |
| 1044 | FALSE, |
| 1045 | 0, |
| 1046 | 0, |
| 1047 | FALSE), |
| 1048 | |
| 1049 | HOWTO (R_add, |
| 1050 | 0, |
| 1051 | 0, |
| 1052 | 0, |
| 1053 | FALSE, |
| 1054 | 0, |
| 1055 | complain_overflow_dont, |
| 1056 | bfin_oper_reloc, |
| 1057 | "R_expst_add", |
| 1058 | FALSE, |
| 1059 | 0, |
| 1060 | 0, |
| 1061 | FALSE), |
| 1062 | |
| 1063 | HOWTO (R_sub, |
| 1064 | 0, |
| 1065 | 0, |
| 1066 | 0, |
| 1067 | FALSE, |
| 1068 | 0, |
| 1069 | complain_overflow_dont, |
| 1070 | bfin_oper_reloc, |
| 1071 | "R_expst_sub", |
| 1072 | FALSE, |
| 1073 | 0, |
| 1074 | 0, |
| 1075 | FALSE), |
| 1076 | |
| 1077 | HOWTO (R_mult, |
| 1078 | 0, |
| 1079 | 0, |
| 1080 | 0, |
| 1081 | FALSE, |
| 1082 | 0, |
| 1083 | complain_overflow_dont, |
| 1084 | bfin_oper_reloc, |
| 1085 | "R_expst_mult", |
| 1086 | FALSE, |
| 1087 | 0, |
| 1088 | 0, |
| 1089 | FALSE), |
| 1090 | |
| 1091 | HOWTO (R_div, /* type. */ |
| 1092 | 0, /* rightshift. */ |
| 1093 | 0, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1094 | 0, /* bitsize. */ |
| 1095 | FALSE, /* pc_relative. */ |
| 1096 | 0, /* bitpos. */ |
| 1097 | complain_overflow_dont, /* complain_on_overflow. */ |
| 1098 | bfin_oper_reloc, /* special_function. */ |
| 1099 | "R_expst_div", /* name. */ |
| 1100 | FALSE, /* partial_inplace. */ |
| 1101 | 0, /* src_mask. */ |
| 1102 | 0, /* dst_mask. */ |
| 1103 | FALSE), /* pcrel_offset. */ |
| 1104 | |
| 1105 | HOWTO (R_mod, /* type. */ |
| 1106 | 0, /* rightshift. */ |
| 1107 | 0, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1108 | 0, /* bitsize. */ |
| 1109 | FALSE, /* pc_relative. */ |
| 1110 | 0, /* bitpos. */ |
| 1111 | complain_overflow_dont, /* complain_on_overflow. */ |
| 1112 | bfin_oper_reloc, /* special_function. */ |
| 1113 | "R_expst_mod", /* name. */ |
| 1114 | FALSE, /* partial_inplace. */ |
| 1115 | 0, /* src_mask. */ |
| 1116 | 0, /* dst_mask. */ |
| 1117 | FALSE), /* pcrel_offset. */ |
| 1118 | |
| 1119 | HOWTO (R_lshift, /* type. */ |
| 1120 | 0, /* rightshift. */ |
| 1121 | 0, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1122 | 0, /* bitsize. */ |
| 1123 | FALSE, /* pc_relative. */ |
| 1124 | 0, /* bitpos. */ |
| 1125 | complain_overflow_dont, /* complain_on_overflow. */ |
| 1126 | bfin_oper_reloc, /* special_function. */ |
| 1127 | "R_expst_lshift", /* name. */ |
| 1128 | FALSE, /* partial_inplace. */ |
| 1129 | 0, /* src_mask. */ |
| 1130 | 0, /* dst_mask. */ |
| 1131 | FALSE), /* pcrel_offset. */ |
| 1132 | |
| 1133 | HOWTO (R_rshift, /* type. */ |
| 1134 | 0, /* rightshift. */ |
| 1135 | 0, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1136 | 0, /* bitsize. */ |
| 1137 | FALSE, /* pc_relative. */ |
| 1138 | 0, /* bitpos. */ |
| 1139 | complain_overflow_dont, /* complain_on_overflow. */ |
| 1140 | bfin_oper_reloc, /* special_function. */ |
| 1141 | "R_expst_rshift", /* name. */ |
| 1142 | FALSE, /* partial_inplace. */ |
| 1143 | 0, /* src_mask. */ |
| 1144 | 0, /* dst_mask. */ |
| 1145 | FALSE), /* pcrel_offset. */ |
| 1146 | |
| 1147 | HOWTO (R_and, /* type. */ |
| 1148 | 0, /* rightshift. */ |
| 1149 | 0, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1150 | 0, /* bitsize. */ |
| 1151 | FALSE, /* pc_relative. */ |
| 1152 | 0, /* bitpos. */ |
| 1153 | complain_overflow_dont, /* complain_on_overflow. */ |
| 1154 | bfin_oper_reloc, /* special_function. */ |
| 1155 | "R_expst_and", /* name. */ |
| 1156 | FALSE, /* partial_inplace. */ |
| 1157 | 0, /* src_mask. */ |
| 1158 | 0, /* dst_mask. */ |
| 1159 | FALSE), /* pcrel_offset. */ |
| 1160 | |
| 1161 | HOWTO (R_or, /* type. */ |
| 1162 | 0, /* rightshift. */ |
| 1163 | 0, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1164 | 0, /* bitsize. */ |
| 1165 | FALSE, /* pc_relative. */ |
| 1166 | 0, /* bitpos. */ |
| 1167 | complain_overflow_dont, /* complain_on_overflow. */ |
| 1168 | bfin_oper_reloc, /* special_function. */ |
| 1169 | "R_expst_or", /* name. */ |
| 1170 | FALSE, /* partial_inplace. */ |
| 1171 | 0, /* src_mask. */ |
| 1172 | 0, /* dst_mask. */ |
| 1173 | FALSE), /* pcrel_offset. */ |
| 1174 | |
| 1175 | HOWTO (R_xor, /* type. */ |
| 1176 | 0, /* rightshift. */ |
| 1177 | 0, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1178 | 0, /* bitsize. */ |
| 1179 | FALSE, /* pc_relative. */ |
| 1180 | 0, /* bitpos. */ |
| 1181 | complain_overflow_dont, /* complain_on_overflow. */ |
| 1182 | bfin_oper_reloc, /* special_function. */ |
| 1183 | "R_expst_xor", /* name. */ |
| 1184 | FALSE, /* partial_inplace. */ |
| 1185 | 0, /* src_mask. */ |
| 1186 | 0, /* dst_mask. */ |
| 1187 | FALSE), /* pcrel_offset. */ |
| 1188 | |
| 1189 | HOWTO (R_land, /* type. */ |
| 1190 | 0, /* rightshift. */ |
| 1191 | 0, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1192 | 0, /* bitsize. */ |
| 1193 | FALSE, /* pc_relative. */ |
| 1194 | 0, /* bitpos. */ |
| 1195 | complain_overflow_dont, /* complain_on_overflow. */ |
| 1196 | bfin_oper_reloc, /* special_function. */ |
| 1197 | "R_expst_land", /* name. */ |
| 1198 | FALSE, /* partial_inplace. */ |
| 1199 | 0, /* src_mask. */ |
| 1200 | 0, /* dst_mask. */ |
| 1201 | FALSE), /* pcrel_offset. */ |
| 1202 | |
| 1203 | HOWTO (R_lor, /* type. */ |
| 1204 | 0, /* rightshift. */ |
| 1205 | 0, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1206 | 0, /* bitsize. */ |
| 1207 | FALSE, /* pc_relative. */ |
| 1208 | 0, /* bitpos. */ |
| 1209 | complain_overflow_dont, /* complain_on_overflow. */ |
| 1210 | bfin_oper_reloc, /* special_function. */ |
| 1211 | "R_expst_lor", /* name. */ |
| 1212 | FALSE, /* partial_inplace. */ |
| 1213 | 0, /* src_mask. */ |
| 1214 | 0, /* dst_mask. */ |
| 1215 | FALSE), /* pcrel_offset. */ |
| 1216 | |
| 1217 | HOWTO (R_len, /* type. */ |
| 1218 | 0, /* rightshift. */ |
| 1219 | 0, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1220 | 0, /* bitsize. */ |
| 1221 | FALSE, /* pc_relative. */ |
| 1222 | 0, /* bitpos. */ |
| 1223 | complain_overflow_dont, /* complain_on_overflow. */ |
| 1224 | bfin_oper_reloc, /* special_function. */ |
| 1225 | "R_expst_len", /* name. */ |
| 1226 | FALSE, /* partial_inplace. */ |
| 1227 | 0, /* src_mask. */ |
| 1228 | 0, /* dst_mask. */ |
| 1229 | FALSE), /* pcrel_offset. */ |
| 1230 | |
| 1231 | HOWTO (R_neg, /* type. */ |
| 1232 | 0, /* rightshift. */ |
| 1233 | 0, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1234 | 0, /* bitsize. */ |
| 1235 | FALSE, /* pc_relative. */ |
| 1236 | 0, /* bitpos. */ |
| 1237 | complain_overflow_dont, /* complain_on_overflow. */ |
| 1238 | bfin_oper_reloc, /* special_function. */ |
| 1239 | "R_expst_neg", /* name. */ |
| 1240 | FALSE, /* partial_inplace. */ |
| 1241 | 0, /* src_mask. */ |
| 1242 | 0, /* dst_mask. */ |
| 1243 | FALSE), /* pcrel_offset. */ |
| 1244 | |
| 1245 | HOWTO (R_comp, /* type. */ |
| 1246 | 0, /* rightshift. */ |
| 1247 | 0, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1248 | 0, /* bitsize. */ |
| 1249 | FALSE, /* pc_relative. */ |
| 1250 | 0, /* bitpos. */ |
| 1251 | complain_overflow_dont, /* complain_on_overflow. */ |
| 1252 | bfin_oper_reloc, /* special_function. */ |
| 1253 | "R_expst_comp", /* name. */ |
| 1254 | FALSE, /* partial_inplace. */ |
| 1255 | 0, /* src_mask. */ |
| 1256 | 0, /* dst_mask. */ |
| 1257 | FALSE), /* pcrel_offset. */ |
| 1258 | |
| 1259 | HOWTO (R_page, /* type. */ |
| 1260 | 0, /* rightshift. */ |
| 1261 | 0, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1262 | 0, /* bitsize. */ |
| 1263 | FALSE, /* pc_relative. */ |
| 1264 | 0, /* bitpos. */ |
| 1265 | complain_overflow_dont, /* complain_on_overflow. */ |
| 1266 | bfin_oper_reloc, /* special_function. */ |
| 1267 | "R_expst_page", /* name. */ |
| 1268 | FALSE, /* partial_inplace. */ |
| 1269 | 0, /* src_mask. */ |
| 1270 | 0, /* dst_mask. */ |
| 1271 | FALSE), /* pcrel_offset. */ |
| 1272 | |
| 1273 | HOWTO (R_hwpage, /* type. */ |
| 1274 | 0, /* rightshift. */ |
| 1275 | 0, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1276 | 0, /* bitsize. */ |
| 1277 | FALSE, /* pc_relative. */ |
| 1278 | 0, /* bitpos. */ |
| 1279 | complain_overflow_dont, /* complain_on_overflow. */ |
| 1280 | bfin_oper_reloc, /* special_function. */ |
| 1281 | "R_expst_hwpage", /* name. */ |
| 1282 | FALSE, /* partial_inplace. */ |
| 1283 | 0, /* src_mask. */ |
| 1284 | 0, /* dst_mask. */ |
| 1285 | FALSE), /* pcrel_offset. */ |
| 1286 | |
| 1287 | HOWTO (R_addr, /* type. */ |
| 1288 | 0, /* rightshift. */ |
| 1289 | 0, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1290 | 0, /* bitsize. */ |
| 1291 | FALSE, /* pc_relative. */ |
| 1292 | 0, /* bitpos. */ |
| 1293 | complain_overflow_dont, /* complain_on_overflow. */ |
| 1294 | bfin_oper_reloc, /* special_function. */ |
| 1295 | "R_expst_addr", /* name. */ |
| 1296 | FALSE, /* partial_inplace. */ |
| 1297 | 0, /* src_mask. */ |
| 1298 | 0, /* dst_mask. */ |
| 1299 | FALSE), /* pcrel_offset. */ |
| 1300 | }; |
| 1301 | |
| 1302 | static reloc_howto_type bfin_gnuext_howto_table [] = |
| 1303 | { |
| 1304 | HOWTO (R_pltpc, /* type. */ |
| 1305 | 0, /* rightshift. */ |
| 1306 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1307 | 16, /* bitsize. */ |
| 1308 | FALSE, /* pc_relative. */ |
| 1309 | 0, /* bitpos. */ |
| 1310 | complain_overflow_bitfield, /* complain_on_overflow. */ |
| 1311 | bfin_pltpc_reloc, /* special_function. */ |
| 1312 | "R_pltpc", /* name. */ |
| 1313 | FALSE, /* partial_inplace. */ |
| 1314 | 0xffff, /* src_mask. */ |
| 1315 | 0xffff, /* dst_mask. */ |
| 1316 | FALSE), /* pcrel_offset. */ |
| 1317 | |
| 1318 | HOWTO (R_got, /* type. */ |
| 1319 | 0, /* rightshift. */ |
| 1320 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1321 | 16, /* bitsize. */ |
| 1322 | FALSE, /* pc_relative. */ |
| 1323 | 0, /* bitpos. */ |
| 1324 | complain_overflow_bitfield, /* complain_on_overflow. */ |
| 1325 | bfd_elf_generic_reloc, /* special_function. */ |
| 1326 | "R_got", /* name. */ |
| 1327 | FALSE, /* partial_inplace. */ |
| 1328 | 0x7fff, /* src_mask. */ |
| 1329 | 0x7fff, /* dst_mask. */ |
| 1330 | FALSE), /* pcrel_offset. */ |
| 1331 | |
| 1332 | /* GNU extension to record C++ vtable hierarchy. */ |
| 1333 | HOWTO (R_BFIN_GNU_VTINHERIT, /* type. */ |
| 1334 | 0, /* rightshift. */ |
| 1335 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1336 | 0, /* bitsize. */ |
| 1337 | FALSE, /* pc_relative. */ |
| 1338 | 0, /* bitpos. */ |
| 1339 | complain_overflow_dont, /* complain_on_overflow. */ |
| 1340 | NULL, /* special_function. */ |
| 1341 | "R_BFIN_GNU_VTINHERIT", /* name. */ |
| 1342 | FALSE, /* partial_inplace. */ |
| 1343 | 0, /* src_mask. */ |
| 1344 | 0, /* dst_mask. */ |
| 1345 | FALSE), /* pcrel_offset. */ |
| 1346 | |
| 1347 | /* GNU extension to record C++ vtable member usage. */ |
| 1348 | HOWTO (R_BFIN_GNU_VTENTRY, /* type. */ |
| 1349 | 0, /* rightshift. */ |
| 1350 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 1351 | 0, /* bitsize. */ |
| 1352 | FALSE, /* pc_relative. */ |
| 1353 | 0, /* bitpos. */ |
| 1354 | complain_overflow_dont, /* complain_on_overflow. */ |
| 1355 | _bfd_elf_rel_vtable_reloc_fn, /* special_function. */ |
| 1356 | "R_BFIN_GNU_VTENTRY", /* name. */ |
| 1357 | FALSE, /* partial_inplace. */ |
| 1358 | 0, /* src_mask. */ |
| 1359 | 0, /* dst_mask. */ |
| 1360 | FALSE) /* pcrel_offset. */ |
| 1361 | }; |
| 1362 | |
| 1363 | struct bfin_reloc_map |
| 1364 | { |
| 1365 | bfd_reloc_code_real_type bfd_reloc_val; |
| 1366 | unsigned int bfin_reloc_val; |
| 1367 | }; |
| 1368 | |
| 1369 | static const struct bfin_reloc_map bfin_reloc_map [] = |
| 1370 | { |
| 1371 | { BFD_RELOC_NONE, R_unused0 }, |
| 1372 | { BFD_RELOC_BFIN_5_PCREL, R_pcrel5m2 }, |
| 1373 | { BFD_RELOC_NONE, R_unused1 }, |
| 1374 | { BFD_RELOC_BFIN_10_PCREL, R_pcrel10 }, |
| 1375 | { BFD_RELOC_BFIN_12_PCREL_JUMP, R_pcrel12_jump }, |
| 1376 | { BFD_RELOC_BFIN_16_IMM, R_rimm16 }, |
| 1377 | { BFD_RELOC_BFIN_16_LOW, R_luimm16 }, |
| 1378 | { BFD_RELOC_BFIN_16_HIGH, R_huimm16 }, |
| 1379 | { BFD_RELOC_BFIN_12_PCREL_JUMP_S, R_pcrel12_jump_s }, |
| 1380 | { BFD_RELOC_24_PCREL, R_pcrel24 }, |
| 1381 | { BFD_RELOC_24_PCREL, R_pcrel24 }, |
| 1382 | { BFD_RELOC_BFIN_24_PCREL_JUMP_L, R_pcrel24_jump_l }, |
| 1383 | { BFD_RELOC_NONE, R_unusedb }, |
| 1384 | { BFD_RELOC_NONE, R_unusedc }, |
| 1385 | { BFD_RELOC_BFIN_24_PCREL_CALL_X, R_pcrel24_call_x }, |
| 1386 | { BFD_RELOC_8, R_byte_data }, |
| 1387 | { BFD_RELOC_16, R_byte2_data }, |
| 1388 | { BFD_RELOC_32, R_byte4_data }, |
| 1389 | { BFD_RELOC_BFIN_11_PCREL, R_pcrel11 }, |
| 1390 | { BFD_RELOC_BFIN_GOT, R_got }, |
| 1391 | { BFD_RELOC_BFIN_PLTPC, R_pltpc }, |
| 1392 | { BFD_RELOC_VTABLE_INHERIT, R_BFIN_GNU_VTINHERIT }, |
| 1393 | { BFD_RELOC_VTABLE_ENTRY, R_BFIN_GNU_VTENTRY }, |
| 1394 | { BFD_ARELOC_BFIN_PUSH, R_push }, |
| 1395 | { BFD_ARELOC_BFIN_CONST, R_const }, |
| 1396 | { BFD_ARELOC_BFIN_ADD, R_add }, |
| 1397 | { BFD_ARELOC_BFIN_SUB, R_sub }, |
| 1398 | { BFD_ARELOC_BFIN_MULT, R_mult }, |
| 1399 | { BFD_ARELOC_BFIN_DIV, R_div }, |
| 1400 | { BFD_ARELOC_BFIN_MOD, R_mod }, |
| 1401 | { BFD_ARELOC_BFIN_LSHIFT, R_lshift }, |
| 1402 | { BFD_ARELOC_BFIN_RSHIFT, R_rshift }, |
| 1403 | { BFD_ARELOC_BFIN_AND, R_and }, |
| 1404 | { BFD_ARELOC_BFIN_OR, R_or }, |
| 1405 | { BFD_ARELOC_BFIN_XOR, R_xor }, |
| 1406 | { BFD_ARELOC_BFIN_LAND, R_land }, |
| 1407 | { BFD_ARELOC_BFIN_LOR, R_lor }, |
| 1408 | { BFD_ARELOC_BFIN_LEN, R_len }, |
| 1409 | { BFD_ARELOC_BFIN_NEG, R_neg }, |
| 1410 | { BFD_ARELOC_BFIN_COMP, R_comp }, |
| 1411 | { BFD_ARELOC_BFIN_PAGE, R_page }, |
| 1412 | { BFD_ARELOC_BFIN_HWPAGE, R_hwpage }, |
| 1413 | { BFD_ARELOC_BFIN_ADDR, R_addr } |
| 1414 | |
| 1415 | }; |
| 1416 | |
| 1417 | |
| 1418 | static void |
| 1419 | bfin_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, |
| 1420 | arelent *cache_ptr, |
| 1421 | Elf_Internal_Rela *dst) |
| 1422 | { |
| 1423 | unsigned int r_type; |
| 1424 | |
| 1425 | r_type = ELF32_R_TYPE (dst->r_info); |
| 1426 | |
| 1427 | if (r_type <= BFIN_RELOC_MAX) |
| 1428 | cache_ptr->howto = &bfin_howto_table [r_type]; |
| 1429 | |
| 1430 | else if (r_type >= BFIN_ARELOC_MIN && r_type <= BFIN_ARELOC_MAX) |
| 1431 | cache_ptr->howto = &bfin_areloc_howto_table [r_type - BFIN_ARELOC_MIN]; |
| 1432 | |
| 1433 | else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX) |
| 1434 | cache_ptr->howto = &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN]; |
| 1435 | |
| 1436 | else |
| 1437 | cache_ptr->howto = (reloc_howto_type *) NULL; |
| 1438 | |
| 1439 | } |
| 1440 | /* Given a BFD reloc type, return the howto. */ |
| 1441 | static reloc_howto_type * |
| 1442 | bfin_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
| 1443 | bfd_reloc_code_real_type code) |
| 1444 | { |
| 1445 | unsigned int i; |
| 1446 | unsigned int r_type = BFIN_RELOC_MIN; |
| 1447 | |
| 1448 | for (i = sizeof (bfin_reloc_map) / sizeof (bfin_reloc_map[0]); --i;) |
| 1449 | if (bfin_reloc_map[i].bfd_reloc_val == code) |
| 1450 | r_type = bfin_reloc_map[i].bfin_reloc_val; |
| 1451 | |
| 1452 | if (r_type <= BFIN_RELOC_MAX && r_type > BFIN_RELOC_MIN) |
| 1453 | return &bfin_howto_table [r_type]; |
| 1454 | |
| 1455 | else if (r_type >= BFIN_ARELOC_MIN && r_type <= BFIN_ARELOC_MAX) |
| 1456 | return &bfin_areloc_howto_table [r_type - BFIN_ARELOC_MIN]; |
| 1457 | |
| 1458 | else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX) |
| 1459 | return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN]; |
| 1460 | |
| 1461 | return (reloc_howto_type *) NULL; |
| 1462 | |
| 1463 | } |
| 1464 | /* Given a bfin relocation type, return the howto. */ |
| 1465 | static reloc_howto_type * |
| 1466 | bfin_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
| 1467 | unsigned int r_type) |
| 1468 | { |
| 1469 | if (r_type <= BFIN_RELOC_MAX) |
| 1470 | return &bfin_howto_table [r_type]; |
| 1471 | |
| 1472 | else if (r_type >= BFIN_ARELOC_MIN && r_type <= BFIN_ARELOC_MAX) |
| 1473 | return &bfin_areloc_howto_table [r_type - BFIN_ARELOC_MIN]; |
| 1474 | |
| 1475 | else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX) |
| 1476 | return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN]; |
| 1477 | |
| 1478 | return (reloc_howto_type *) NULL; |
| 1479 | |
| 1480 | } |
| 1481 | |
| 1482 | /* Return TRUE if the name is a local label. |
| 1483 | bfin local labels begin with L$. */ |
| 1484 | static bfd_boolean |
| 1485 | bfin_is_local_label_name ( |
| 1486 | bfd *abfd ATTRIBUTE_UNUSED, |
| 1487 | const char *label) |
| 1488 | { |
| 1489 | if (label[0] == 'L' && label[1] == '$' ) |
| 1490 | return TRUE; |
| 1491 | |
| 1492 | return _bfd_elf_is_local_label_name (abfd, label); |
| 1493 | } |
| 1494 | |
| 1495 | |
| 1496 | /* Look through the relocs for a section during the first phase, and |
| 1497 | allocate space in the global offset table or procedure linkage |
| 1498 | table. */ |
| 1499 | |
| 1500 | static bfd_boolean |
| 1501 | bfin_check_relocs (bfd * abfd, |
| 1502 | struct bfd_link_info *info, |
| 1503 | asection *sec, |
| 1504 | const Elf_Internal_Rela *relocs) |
| 1505 | { |
| 1506 | bfd *dynobj; |
| 1507 | Elf_Internal_Shdr *symtab_hdr; |
| 1508 | struct elf_link_hash_entry **sym_hashes; |
| 1509 | bfd_signed_vma *local_got_refcounts; |
| 1510 | const Elf_Internal_Rela *rel; |
| 1511 | const Elf_Internal_Rela *rel_end; |
| 1512 | asection *sgot; |
| 1513 | asection *srelgot; |
| 1514 | asection *sreloc; |
| 1515 | if (info->relocatable) |
| 1516 | return TRUE; |
| 1517 | |
| 1518 | dynobj = elf_hash_table (info)->dynobj; |
| 1519 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1520 | sym_hashes = elf_sym_hashes (abfd); |
| 1521 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 1522 | |
| 1523 | sgot = NULL; |
| 1524 | srelgot = NULL; |
| 1525 | sreloc = NULL; |
| 1526 | |
| 1527 | rel_end = relocs + sec->reloc_count; |
| 1528 | for (rel = relocs; rel < rel_end; rel++) |
| 1529 | { |
| 1530 | unsigned long r_symndx; |
| 1531 | struct elf_link_hash_entry *h; |
| 1532 | |
| 1533 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1534 | if (r_symndx < symtab_hdr->sh_info) |
| 1535 | h = NULL; |
| 1536 | else |
| 1537 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1538 | |
| 1539 | switch (ELF32_R_TYPE (rel->r_info)) |
| 1540 | { |
| 1541 | /* This relocation describes the C++ object vtable hierarchy. |
| 1542 | Reconstruct it for later use during GC. */ |
| 1543 | case R_BFIN_GNU_VTINHERIT: |
| 1544 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 1545 | return FALSE; |
| 1546 | break; |
| 1547 | |
| 1548 | /* This relocation describes which C++ vtable entries |
| 1549 | are actually used. Record for later use during GC. */ |
| 1550 | case R_BFIN_GNU_VTENTRY: |
| 1551 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 1552 | return FALSE; |
| 1553 | break; |
| 1554 | |
| 1555 | case R_got: |
| 1556 | if (h != NULL |
| 1557 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 1558 | break; |
| 1559 | /* Fall through. */ |
| 1560 | |
| 1561 | if (dynobj == NULL) |
| 1562 | { |
| 1563 | /* Create the .got section. */ |
| 1564 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 1565 | if (!_bfd_elf_create_got_section (dynobj, info)) |
| 1566 | return FALSE; |
| 1567 | } |
| 1568 | |
| 1569 | if (sgot == NULL) |
| 1570 | { |
| 1571 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1572 | BFD_ASSERT (sgot != NULL); |
| 1573 | } |
| 1574 | |
| 1575 | if (srelgot == NULL && (h != NULL || info->shared)) |
| 1576 | { |
| 1577 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 1578 | if (srelgot == NULL) |
| 1579 | { |
| 1580 | srelgot = bfd_make_section (dynobj, ".rela.got"); |
| 1581 | if (srelgot == NULL |
| 1582 | || !bfd_set_section_flags (dynobj, srelgot, |
| 1583 | (SEC_ALLOC |
| 1584 | | SEC_LOAD |
| 1585 | | SEC_HAS_CONTENTS |
| 1586 | | SEC_IN_MEMORY |
| 1587 | | SEC_LINKER_CREATED |
| 1588 | | SEC_READONLY)) |
| 1589 | || !bfd_set_section_alignment (dynobj, srelgot, 2)) |
| 1590 | return FALSE; |
| 1591 | } |
| 1592 | } |
| 1593 | |
| 1594 | if (h != NULL) |
| 1595 | { |
| 1596 | if (h->got.refcount == 0) |
| 1597 | { |
| 1598 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 1599 | if (h->dynindx == -1 && !h->forced_local) |
| 1600 | { |
| 1601 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1602 | return FALSE; |
| 1603 | } |
| 1604 | |
| 1605 | /* Allocate space in the .got section. */ |
| 1606 | sgot->size += 4; |
| 1607 | /* Allocate relocation space. */ |
| 1608 | srelgot->size += sizeof (Elf32_External_Rela); |
| 1609 | } |
| 1610 | h->got.refcount++; |
| 1611 | } |
| 1612 | else |
| 1613 | { |
| 1614 | /* This is a global offset table entry for a local symbol. */ |
| 1615 | if (local_got_refcounts == NULL) |
| 1616 | { |
| 1617 | bfd_size_type size; |
| 1618 | |
| 1619 | size = symtab_hdr->sh_info; |
| 1620 | size *= sizeof (bfd_signed_vma); |
| 1621 | local_got_refcounts = ((bfd_signed_vma *) |
| 1622 | bfd_zalloc (abfd, size)); |
| 1623 | if (local_got_refcounts == NULL) |
| 1624 | return FALSE; |
| 1625 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 1626 | } |
| 1627 | if (local_got_refcounts[r_symndx] == 0) |
| 1628 | { |
| 1629 | sgot->size += 4; |
| 1630 | if (info->shared) |
| 1631 | { |
| 1632 | /* If we are generating a shared object, we need to |
| 1633 | output a R_68K_RELATIVE reloc so that the dynamic |
| 1634 | linker can adjust this GOT entry. */ |
| 1635 | srelgot->size += sizeof (Elf32_External_Rela); |
| 1636 | } |
| 1637 | } |
| 1638 | local_got_refcounts[r_symndx]++; |
| 1639 | } |
| 1640 | break; |
| 1641 | |
| 1642 | default: |
| 1643 | break; |
| 1644 | } |
| 1645 | } |
| 1646 | |
| 1647 | return TRUE; |
| 1648 | } |
| 1649 | |
| 1650 | static enum elf_reloc_type_class |
| 1651 | elf32_bfin_reloc_type_class (const Elf_Internal_Rela * rela) |
| 1652 | { |
| 1653 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 1654 | { |
| 1655 | default: |
| 1656 | return reloc_class_normal; |
| 1657 | } |
| 1658 | } |
| 1659 | |
| 1660 | static bfd_boolean |
| 1661 | bfin_relocate_section (bfd * output_bfd, |
| 1662 | struct bfd_link_info *info, |
| 1663 | bfd * input_bfd, |
| 1664 | asection * input_section, |
| 1665 | bfd_byte * contents, |
| 1666 | Elf_Internal_Rela * relocs, |
| 1667 | Elf_Internal_Sym * local_syms, |
| 1668 | asection ** local_sections) |
| 1669 | { |
| 1670 | bfd *dynobj; |
| 1671 | Elf_Internal_Shdr *symtab_hdr; |
| 1672 | struct elf_link_hash_entry **sym_hashes; |
| 1673 | bfd_vma *local_got_offsets; |
| 1674 | asection *sgot; |
| 1675 | asection *sreloc; |
| 1676 | Elf_Internal_Rela *rel; |
| 1677 | Elf_Internal_Rela *relend; |
| 1678 | int i = 0; |
| 1679 | |
| 1680 | if (info->relocatable) |
| 1681 | return TRUE; |
| 1682 | |
| 1683 | dynobj = elf_hash_table (info)->dynobj; |
| 1684 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1685 | sym_hashes = elf_sym_hashes (input_bfd); |
| 1686 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 1687 | |
| 1688 | sgot = NULL; |
| 1689 | sreloc = NULL; |
| 1690 | |
| 1691 | rel = relocs; |
| 1692 | relend = relocs + input_section->reloc_count; |
| 1693 | for (; rel < relend; rel++, i++) |
| 1694 | { |
| 1695 | int r_type; |
| 1696 | reloc_howto_type *howto; |
| 1697 | unsigned long r_symndx; |
| 1698 | struct elf_link_hash_entry *h; |
| 1699 | Elf_Internal_Sym *sym; |
| 1700 | asection *sec; |
| 1701 | bfd_vma relocation = 0; |
| 1702 | bfd_boolean unresolved_reloc; |
| 1703 | bfd_reloc_status_type r; |
| 1704 | bfd_vma address; |
| 1705 | |
| 1706 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1707 | if (r_type < 0 || r_type >= 243) |
| 1708 | { |
| 1709 | bfd_set_error (bfd_error_bad_value); |
| 1710 | return FALSE; |
| 1711 | } |
| 1712 | |
| 1713 | if (r_type == R_BFIN_GNU_VTENTRY |
| 1714 | || r_type == R_BFIN_GNU_VTINHERIT) |
| 1715 | continue; |
| 1716 | |
| 1717 | howto = bfin_reloc_type_lookup (input_bfd, r_type); |
| 1718 | if (howto == NULL) |
| 1719 | { |
| 1720 | bfd_set_error (bfd_error_bad_value); |
| 1721 | return FALSE; |
| 1722 | } |
| 1723 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1724 | |
| 1725 | h = NULL; |
| 1726 | sym = NULL; |
| 1727 | sec = NULL; |
| 1728 | unresolved_reloc = FALSE; |
| 1729 | |
| 1730 | if (r_symndx < symtab_hdr->sh_info) |
| 1731 | { |
| 1732 | sym = local_syms + r_symndx; |
| 1733 | sec = local_sections[r_symndx]; |
| 1734 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 1735 | } |
| 1736 | else |
| 1737 | { |
| 1738 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1739 | |
| 1740 | while (h->root.type == bfd_link_hash_indirect |
| 1741 | || h->root.type == bfd_link_hash_warning) |
| 1742 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1743 | |
| 1744 | if (! |
| 1745 | (!strcmp (h->root.root.string, ".__constant") |
| 1746 | || !strcmp (h->root.root.string, ".__operator"))) |
| 1747 | { |
| 1748 | bfd_boolean warned; |
| 1749 | h = NULL; |
| 1750 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 1751 | r_symndx, symtab_hdr, sym_hashes, |
| 1752 | h, sec, relocation, |
| 1753 | unresolved_reloc, warned); |
| 1754 | |
| 1755 | } |
| 1756 | } |
| 1757 | |
| 1758 | address = rel->r_offset; |
| 1759 | /* First, get stack relocs out of the way. */ |
| 1760 | switch (r_type) |
| 1761 | { |
| 1762 | case R_push: |
| 1763 | reloc_stack_push (relocation + rel->r_addend); |
| 1764 | r = bfd_reloc_ok; |
| 1765 | goto done_reloc; |
| 1766 | case R_const: |
| 1767 | reloc_stack_push (rel->r_addend); |
| 1768 | r = bfd_reloc_ok; |
| 1769 | goto done_reloc; |
| 1770 | case R_add: |
| 1771 | case R_sub: |
| 1772 | case R_mult: |
| 1773 | case R_div: |
| 1774 | case R_mod: |
| 1775 | case R_lshift: |
| 1776 | case R_rshift: |
| 1777 | case R_neg: |
| 1778 | case R_and: |
| 1779 | case R_or: |
| 1780 | case R_xor: |
| 1781 | case R_land: |
| 1782 | case R_lor: |
| 1783 | case R_comp: |
| 1784 | case R_page: |
| 1785 | case R_hwpage: |
| 1786 | reloc_stack_operate (r_type); |
| 1787 | r = bfd_reloc_ok; |
| 1788 | goto done_reloc; |
| 1789 | |
| 1790 | default: |
| 1791 | if (!is_reloc_stack_empty()) |
| 1792 | relocation = reloc_stack_pop (); |
| 1793 | break; |
| 1794 | } |
| 1795 | |
| 1796 | /* Then, process normally. */ |
| 1797 | switch (r_type) |
| 1798 | { |
| 1799 | case R_BFIN_GNU_VTINHERIT: |
| 1800 | case R_BFIN_GNU_VTENTRY: |
| 1801 | return bfd_reloc_ok; |
| 1802 | |
| 1803 | case R_got: |
| 1804 | /* Relocation is to the address of the entry for this symbol |
| 1805 | in the global offset table. */ |
| 1806 | if (h != NULL |
| 1807 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 1808 | goto do_default; |
| 1809 | /* Fall through. */ |
| 1810 | /* Relocation is the offset of the entry for this symbol in |
| 1811 | the global offset table. */ |
| 1812 | |
| 1813 | { |
| 1814 | bfd_vma off; |
| 1815 | |
| 1816 | if (sgot == NULL) |
| 1817 | { |
| 1818 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1819 | BFD_ASSERT (sgot != NULL); |
| 1820 | } |
| 1821 | |
| 1822 | if (h != NULL) |
| 1823 | { |
| 1824 | bfd_boolean dyn; |
| 1825 | |
| 1826 | off = h->got.offset; |
| 1827 | BFD_ASSERT (off != (bfd_vma) - 1); |
| 1828 | dyn = elf_hash_table (info)->dynamic_sections_created; |
| 1829 | |
| 1830 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 1831 | || (info->shared |
| 1832 | && (info->symbolic |
| 1833 | || h->dynindx == -1 |
| 1834 | || h->forced_local) |
| 1835 | && h->def_regular)) |
| 1836 | { |
| 1837 | /* This is actually a static link, or it is a |
| 1838 | -Bsymbolic link and the symbol is defined |
| 1839 | locally, or the symbol was forced to be local |
| 1840 | because of a version file.. We must initialize |
| 1841 | this entry in the global offset table. Since |
| 1842 | the offset must always be a multiple of 4, we |
| 1843 | use the least significant bit to record whether |
| 1844 | we have initialized it already. |
| 1845 | |
| 1846 | When doing a dynamic link, we create a .rela.got |
| 1847 | relocation entry to initialize the value. This |
| 1848 | is done in the finish_dynamic_symbol routine. */ |
| 1849 | if ((off & 1) != 0) |
| 1850 | off &= ~1; |
| 1851 | else |
| 1852 | { |
| 1853 | bfd_put_32 (output_bfd, relocation, |
| 1854 | sgot->contents + off); |
| 1855 | h->got.offset |= 1; |
| 1856 | } |
| 1857 | } |
| 1858 | else |
| 1859 | unresolved_reloc = FALSE; |
| 1860 | } |
| 1861 | else |
| 1862 | { |
| 1863 | BFD_ASSERT (local_got_offsets != NULL); |
| 1864 | off = local_got_offsets[r_symndx]; |
| 1865 | BFD_ASSERT (off != (bfd_vma) - 1); |
| 1866 | |
| 1867 | /* The offset must always be a multiple of 4. We use |
| 1868 | the least significant bit to record whether we have |
| 1869 | already generated the necessary reloc. */ |
| 1870 | if ((off & 1) != 0) |
| 1871 | off &= ~1; |
| 1872 | else |
| 1873 | { |
| 1874 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); |
| 1875 | |
| 1876 | if (info->shared) |
| 1877 | { |
| 1878 | asection *s; |
| 1879 | Elf_Internal_Rela outrel; |
| 1880 | bfd_byte *loc; |
| 1881 | |
| 1882 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 1883 | BFD_ASSERT (s != NULL); |
| 1884 | |
| 1885 | outrel.r_offset = (sgot->output_section->vma |
| 1886 | + sgot->output_offset + off); |
| 1887 | outrel.r_info = |
| 1888 | ELF32_R_INFO (0, R_pcrel24); |
| 1889 | outrel.r_addend = relocation; |
| 1890 | loc = s->contents; |
| 1891 | loc += |
| 1892 | s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 1893 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 1894 | } |
| 1895 | |
| 1896 | local_got_offsets[r_symndx] |= 1; |
| 1897 | } |
| 1898 | } |
| 1899 | |
| 1900 | relocation = sgot->output_offset + off; |
| 1901 | rel->r_addend = 0; |
| 1902 | /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */ |
| 1903 | relocation /= 4; |
| 1904 | } |
| 1905 | goto do_default; |
| 1906 | |
| 1907 | case R_pcrel24: |
| 1908 | case R_pcrel24_jump_l: |
| 1909 | { |
| 1910 | bfd_vma x; |
| 1911 | |
| 1912 | relocation += rel->r_addend; |
| 1913 | |
| 1914 | /* Perform usual pc-relative correction. */ |
| 1915 | relocation -= input_section->output_section->vma + input_section->output_offset; |
| 1916 | relocation -= address; |
| 1917 | |
| 1918 | /* We are getting reloc_entry->address 2 byte off from |
| 1919 | the start of instruction. Assuming absolute postion |
| 1920 | of the reloc data. But, following code had been written assuming |
| 1921 | reloc address is starting at begining of instruction. |
| 1922 | To compensate that I have increased the value of |
| 1923 | relocation by 1 (effectively 2) and used the addr -2 instead of addr. */ |
| 1924 | |
| 1925 | relocation += 2; |
| 1926 | address -= 2; |
| 1927 | |
| 1928 | relocation >>= 1; |
| 1929 | |
| 1930 | x = bfd_get_16 (input_bfd, contents + address); |
| 1931 | x = (x & 0xff00) | ((relocation >> 16) & 0xff); |
| 1932 | bfd_put_16 (input_bfd, x, contents + address); |
| 1933 | |
| 1934 | x = bfd_get_16 (input_bfd, contents + address + 2); |
| 1935 | x = relocation & 0xFFFF; |
| 1936 | bfd_put_16 (input_bfd, x, contents + address + 2); |
| 1937 | r = bfd_reloc_ok; |
| 1938 | } |
| 1939 | break; |
| 1940 | |
| 1941 | default: |
| 1942 | do_default: |
| 1943 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 1944 | contents, address, |
| 1945 | relocation, rel->r_addend); |
| 1946 | |
| 1947 | break; |
| 1948 | } |
| 1949 | |
| 1950 | done_reloc: |
| 1951 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| 1952 | because such sections are not SEC_ALLOC and thus ld.so will |
| 1953 | not process them. */ |
| 1954 | if (unresolved_reloc |
| 1955 | && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic)) |
| 1956 | { |
| 1957 | (*_bfd_error_handler) |
| 1958 | (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"), |
| 1959 | input_bfd, |
| 1960 | input_section, (long) rel->r_offset, h->root.root.string); |
| 1961 | return FALSE; |
| 1962 | } |
| 1963 | |
| 1964 | if (r != bfd_reloc_ok) |
| 1965 | { |
| 1966 | const char *name; |
| 1967 | |
| 1968 | if (h != NULL) |
| 1969 | name = h->root.root.string; |
| 1970 | else |
| 1971 | { |
| 1972 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 1973 | symtab_hdr->sh_link, |
| 1974 | sym->st_name); |
| 1975 | if (name == NULL) |
| 1976 | return FALSE; |
| 1977 | if (*name == '\0') |
| 1978 | name = bfd_section_name (input_bfd, sec); |
| 1979 | } |
| 1980 | |
| 1981 | if (r == bfd_reloc_overflow) |
| 1982 | { |
| 1983 | if (!(info->callbacks->reloc_overflow |
| 1984 | (info, (h ? &h->root : NULL), name, howto->name, |
| 1985 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset))) |
| 1986 | return FALSE; |
| 1987 | } |
| 1988 | else |
| 1989 | { |
| 1990 | (*_bfd_error_handler) |
| 1991 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
| 1992 | input_bfd, input_section, |
| 1993 | (long) rel->r_offset, name, (int) r); |
| 1994 | return FALSE; |
| 1995 | } |
| 1996 | } |
| 1997 | } |
| 1998 | |
| 1999 | return TRUE; |
| 2000 | } |
| 2001 | |
| 2002 | static asection * |
| 2003 | bfin_gc_mark_hook (asection * sec, |
| 2004 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 2005 | Elf_Internal_Rela * rel, |
| 2006 | struct elf_link_hash_entry *h, |
| 2007 | Elf_Internal_Sym * sym) |
| 2008 | { |
| 2009 | if (h != NULL) |
| 2010 | { |
| 2011 | switch (ELF32_R_TYPE (rel->r_info)) |
| 2012 | { |
| 2013 | |
| 2014 | case R_BFIN_GNU_VTINHERIT: |
| 2015 | case R_BFIN_GNU_VTENTRY: |
| 2016 | break; |
| 2017 | |
| 2018 | default: |
| 2019 | switch (h->root.type) |
| 2020 | { |
| 2021 | default: |
| 2022 | break; |
| 2023 | |
| 2024 | case bfd_link_hash_defined: |
| 2025 | case bfd_link_hash_defweak: |
| 2026 | return h->root.u.def.section; |
| 2027 | |
| 2028 | case bfd_link_hash_common: |
| 2029 | return h->root.u.c.p->section; |
| 2030 | } |
| 2031 | } |
| 2032 | } |
| 2033 | else |
| 2034 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| 2035 | |
| 2036 | return NULL; |
| 2037 | } |
| 2038 | |
| 2039 | |
| 2040 | /* Update the got entry reference counts for the section being removed. */ |
| 2041 | |
| 2042 | static bfd_boolean |
| 2043 | bfin_gc_sweep_hook (bfd * abfd, |
| 2044 | struct bfd_link_info *info, |
| 2045 | asection * sec, |
| 2046 | const Elf_Internal_Rela * relocs) |
| 2047 | { |
| 2048 | Elf_Internal_Shdr *symtab_hdr; |
| 2049 | struct elf_link_hash_entry **sym_hashes; |
| 2050 | bfd_signed_vma *local_got_refcounts; |
| 2051 | const Elf_Internal_Rela *rel, *relend; |
| 2052 | bfd *dynobj; |
| 2053 | asection *sgot; |
| 2054 | asection *srelgot; |
| 2055 | |
| 2056 | dynobj = elf_hash_table (info)->dynobj; |
| 2057 | if (dynobj == NULL) |
| 2058 | return TRUE; |
| 2059 | |
| 2060 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 2061 | sym_hashes = elf_sym_hashes (abfd); |
| 2062 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 2063 | |
| 2064 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 2065 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 2066 | |
| 2067 | relend = relocs + sec->reloc_count; |
| 2068 | for (rel = relocs; rel < relend; rel++) |
| 2069 | { |
| 2070 | unsigned long r_symndx; |
| 2071 | struct elf_link_hash_entry *h; |
| 2072 | |
| 2073 | switch (ELF32_R_TYPE (rel->r_info)) |
| 2074 | { |
| 2075 | case R_got: |
| 2076 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2077 | if (r_symndx >= symtab_hdr->sh_info) |
| 2078 | { |
| 2079 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 2080 | if (h->got.refcount > 0) |
| 2081 | { |
| 2082 | --h->got.refcount; |
| 2083 | if (h->got.refcount == 0) |
| 2084 | { |
| 2085 | /* We don't need the .got entry any more. */ |
| 2086 | sgot->size -= 4; |
| 2087 | srelgot->size -= sizeof (Elf32_External_Rela); |
| 2088 | } |
| 2089 | } |
| 2090 | } |
| 2091 | else if (local_got_refcounts != NULL) |
| 2092 | { |
| 2093 | if (local_got_refcounts[r_symndx] > 0) |
| 2094 | { |
| 2095 | --local_got_refcounts[r_symndx]; |
| 2096 | if (local_got_refcounts[r_symndx] == 0) |
| 2097 | { |
| 2098 | /* We don't need the .got entry any more. */ |
| 2099 | sgot->size -= 4; |
| 2100 | if (info->shared) |
| 2101 | srelgot->size -= sizeof (Elf32_External_Rela); |
| 2102 | } |
| 2103 | } |
| 2104 | } |
| 2105 | break; |
| 2106 | default: |
| 2107 | break; |
| 2108 | } |
| 2109 | } |
| 2110 | |
| 2111 | return TRUE; |
| 2112 | } |
| 2113 | |
| 2114 | |
| 2115 | /* Merge backend specific data from an object file to the output |
| 2116 | object file when linking. */ |
| 2117 | static bfd_boolean |
| 2118 | elf32_bfin_merge_private_bfd_data (bfd * ibfd, bfd * obfd) |
| 2119 | { |
| 2120 | flagword out_flags; |
| 2121 | flagword in_flags; |
| 2122 | |
| 2123 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 2124 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 2125 | return TRUE; |
| 2126 | |
| 2127 | in_flags = elf_elfheader (ibfd)->e_flags; |
| 2128 | out_flags = elf_elfheader (obfd)->e_flags; |
| 2129 | |
| 2130 | if (!elf_flags_init (obfd)) |
| 2131 | { |
| 2132 | elf_flags_init (obfd) = TRUE; |
| 2133 | elf_elfheader (obfd)->e_flags = in_flags; |
| 2134 | } |
| 2135 | |
| 2136 | return TRUE; |
| 2137 | } |
| 2138 | |
| 2139 | |
| 2140 | static bfd_boolean |
| 2141 | elf32_bfin_set_private_flags (bfd * abfd, flagword flags) |
| 2142 | { |
| 2143 | elf_elfheader (abfd)->e_flags = flags; |
| 2144 | elf_flags_init (abfd) = TRUE; |
| 2145 | return TRUE; |
| 2146 | } |
| 2147 | |
| 2148 | |
| 2149 | /* Display the flags field. */ |
| 2150 | static bfd_boolean |
| 2151 | elf32_bfin_print_private_bfd_data (bfd * abfd, PTR ptr) |
| 2152 | { |
| 2153 | FILE *file = (FILE *) ptr; |
| 2154 | |
| 2155 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 2156 | |
| 2157 | /* Print normal ELF private data. */ |
| 2158 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 2159 | |
| 2160 | /* Ignore init flag - it may not be set, despite the flags field |
| 2161 | containing valid data. */ |
| 2162 | |
| 2163 | /* xgettext:c-format */ |
| 2164 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| 2165 | |
| 2166 | fputc ('\n', file); |
| 2167 | |
| 2168 | return TRUE; |
| 2169 | } |
| 2170 | |
| 2171 | /* bfin ELF linker hash entry. */ |
| 2172 | |
| 2173 | struct bfin_link_hash_entry |
| 2174 | { |
| 2175 | struct elf_link_hash_entry root; |
| 2176 | |
| 2177 | /* Number of PC relative relocs copied for this symbol. */ |
| 2178 | struct bfin_pcrel_relocs_copied *pcrel_relocs_copied; |
| 2179 | }; |
| 2180 | |
| 2181 | /* bfin ELF linker hash table. */ |
| 2182 | |
| 2183 | struct bfin_link_hash_table |
| 2184 | { |
| 2185 | struct elf_link_hash_table root; |
| 2186 | |
| 2187 | /* Small local sym to section mapping cache. */ |
| 2188 | struct sym_sec_cache sym_sec; |
| 2189 | }; |
| 2190 | |
| 2191 | #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent)) |
| 2192 | |
| 2193 | static struct bfd_hash_entry * |
| 2194 | bfin_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 2195 | struct bfd_hash_table *table, const char *string) |
| 2196 | { |
| 2197 | struct bfd_hash_entry *ret = entry; |
| 2198 | |
| 2199 | /* Allocate the structure if it has not already been allocated by a |
| 2200 | subclass. */ |
| 2201 | if (ret == NULL) |
| 2202 | ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry)); |
| 2203 | if (ret == NULL) |
| 2204 | return ret; |
| 2205 | |
| 2206 | /* Call the allocation method of the superclass. */ |
| 2207 | ret = _bfd_elf_link_hash_newfunc (ret, table, string); |
| 2208 | if (ret != NULL) |
| 2209 | bfin_hash_entry (ret)->pcrel_relocs_copied = NULL; |
| 2210 | |
| 2211 | return ret; |
| 2212 | } |
| 2213 | |
| 2214 | /* Create an bfin ELF linker hash table. */ |
| 2215 | |
| 2216 | static struct bfd_link_hash_table * |
| 2217 | bfin_link_hash_table_create (bfd * abfd) |
| 2218 | { |
| 2219 | struct bfin_link_hash_table *ret; |
| 2220 | bfd_size_type amt = sizeof (struct bfin_link_hash_table); |
| 2221 | |
| 2222 | ret = (struct bfin_link_hash_table *) bfd_malloc (amt); |
| 2223 | if (ret == (struct bfin_link_hash_table *) NULL) |
| 2224 | return NULL; |
| 2225 | |
| 2226 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 2227 | bfin_link_hash_newfunc)) |
| 2228 | { |
| 2229 | free (ret); |
| 2230 | return NULL; |
| 2231 | } |
| 2232 | |
| 2233 | ret->sym_sec.abfd = NULL; |
| 2234 | |
| 2235 | return &ret->root.root; |
| 2236 | } |
| 2237 | |
| 2238 | /* The size in bytes of an entry in the procedure linkage table. */ |
| 2239 | |
| 2240 | /* Finish up the dynamic sections. */ |
| 2241 | |
| 2242 | static bfd_boolean |
| 2243 | bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, |
| 2244 | struct bfd_link_info *info) |
| 2245 | { |
| 2246 | bfd *dynobj; |
| 2247 | asection *sdyn; |
| 2248 | |
| 2249 | dynobj = elf_hash_table (info)->dynobj; |
| 2250 | |
| 2251 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 2252 | |
| 2253 | if (elf_hash_table (info)->dynamic_sections_created) |
| 2254 | { |
| 2255 | Elf32_External_Dyn *dyncon, *dynconend; |
| 2256 | |
| 2257 | BFD_ASSERT (sdyn != NULL); |
| 2258 | |
| 2259 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 2260 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 2261 | for (; dyncon < dynconend; dyncon++) |
| 2262 | { |
| 2263 | Elf_Internal_Dyn dyn; |
| 2264 | |
| 2265 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 2266 | |
| 2267 | } |
| 2268 | |
| 2269 | } |
| 2270 | return TRUE; |
| 2271 | } |
| 2272 | |
| 2273 | /* Finish up dynamic symbol handling. We set the contents of various |
| 2274 | dynamic sections here. */ |
| 2275 | |
| 2276 | static bfd_boolean |
| 2277 | bfin_finish_dynamic_symbol (bfd * output_bfd, |
| 2278 | struct bfd_link_info *info, |
| 2279 | struct elf_link_hash_entry *h, |
| 2280 | Elf_Internal_Sym * sym) |
| 2281 | { |
| 2282 | bfd *dynobj; |
| 2283 | |
| 2284 | dynobj = elf_hash_table (info)->dynobj; |
| 2285 | |
| 2286 | if (h->got.offset != (bfd_vma) - 1) |
| 2287 | { |
| 2288 | asection *sgot; |
| 2289 | asection *srela; |
| 2290 | Elf_Internal_Rela rela; |
| 2291 | bfd_byte *loc; |
| 2292 | |
| 2293 | /* This symbol has an entry in the global offset table. |
| 2294 | Set it up. */ |
| 2295 | |
| 2296 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 2297 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 2298 | BFD_ASSERT (sgot != NULL && srela != NULL); |
| 2299 | |
| 2300 | rela.r_offset = (sgot->output_section->vma |
| 2301 | + sgot->output_offset |
| 2302 | + (h->got.offset & ~(bfd_vma) 1)); |
| 2303 | |
| 2304 | /* If this is a -Bsymbolic link, and the symbol is defined |
| 2305 | locally, we just want to emit a RELATIVE reloc. Likewise if |
| 2306 | the symbol was forced to be local because of a version file. |
| 2307 | The entry in the global offset table will already have been |
| 2308 | initialized in the relocate_section function. */ |
| 2309 | if (info->shared |
| 2310 | && (info->symbolic |
| 2311 | || h->dynindx == -1 || h->forced_local) && h->def_regular) |
| 2312 | { |
| 2313 | fprintf(stderr, "*** check this relocation %s\n", __FUNCTION__); |
| 2314 | rela.r_info = ELF32_R_INFO (0, R_pcrel24); |
| 2315 | rela.r_addend = bfd_get_signed_32 (output_bfd, |
| 2316 | (sgot->contents |
| 2317 | + |
| 2318 | (h->got. |
| 2319 | offset & ~(bfd_vma) 1))); |
| 2320 | } |
| 2321 | else |
| 2322 | { |
| 2323 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
| 2324 | sgot->contents + (h->got.offset & ~(bfd_vma) 1)); |
| 2325 | rela.r_info = ELF32_R_INFO (h->dynindx, R_got); |
| 2326 | rela.r_addend = 0; |
| 2327 | } |
| 2328 | |
| 2329 | loc = srela->contents; |
| 2330 | loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); |
| 2331 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 2332 | } |
| 2333 | |
| 2334 | if (h->needs_copy) |
| 2335 | { |
| 2336 | BFD_ASSERT (0); |
| 2337 | } |
| 2338 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 2339 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 2340 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 2341 | sym->st_shndx = SHN_ABS; |
| 2342 | |
| 2343 | return TRUE; |
| 2344 | } |
| 2345 | |
| 2346 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 2347 | regular object. The current definition is in some section of the |
| 2348 | dynamic object, but we're not including those sections. We have to |
| 2349 | change the definition to something the rest of the link can |
| 2350 | understand. */ |
| 2351 | |
| 2352 | static bfd_boolean |
| 2353 | bfin_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 2354 | struct elf_link_hash_entry *h) |
| 2355 | { |
| 2356 | bfd *dynobj; |
| 2357 | asection *s; |
| 2358 | unsigned int power_of_two; |
| 2359 | |
| 2360 | dynobj = elf_hash_table (info)->dynobj; |
| 2361 | |
| 2362 | /* Make sure we know what is going on here. */ |
| 2363 | BFD_ASSERT (dynobj != NULL |
| 2364 | && (h->needs_plt |
| 2365 | || h->u.weakdef != NULL |
| 2366 | || (h->def_dynamic && h->ref_regular && !h->def_regular))); |
| 2367 | |
| 2368 | /* If this is a function, put it in the procedure linkage table. We |
| 2369 | will fill in the contents of the procedure linkage table later, |
| 2370 | when we know the address of the .got section. */ |
| 2371 | if (h->type == STT_FUNC || h->needs_plt) |
| 2372 | { |
| 2373 | BFD_ASSERT(0); |
| 2374 | } |
| 2375 | |
| 2376 | /* If this is a weak symbol, and there is a real definition, the |
| 2377 | processor independent code will have arranged for us to see the |
| 2378 | real definition first, and we can just use the same value. */ |
| 2379 | if (h->u.weakdef != NULL) |
| 2380 | { |
| 2381 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 2382 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 2383 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 2384 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 2385 | return TRUE; |
| 2386 | } |
| 2387 | |
| 2388 | /* This is a reference to a symbol defined by a dynamic object which |
| 2389 | is not a function. */ |
| 2390 | |
| 2391 | /* If we are creating a shared library, we must presume that the |
| 2392 | only references to the symbol are via the global offset table. |
| 2393 | For such cases we need not do anything here; the relocations will |
| 2394 | be handled correctly by relocate_section. */ |
| 2395 | if (info->shared) |
| 2396 | return TRUE; |
| 2397 | |
| 2398 | /* We must allocate the symbol in our .dynbss section, which will |
| 2399 | become part of the .bss section of the executable. There will be |
| 2400 | an entry for this symbol in the .dynsym section. The dynamic |
| 2401 | object will contain position independent code, so all references |
| 2402 | from the dynamic object to this symbol will go through the global |
| 2403 | offset table. The dynamic linker will use the .dynsym entry to |
| 2404 | determine the address it must put in the global offset table, so |
| 2405 | both the dynamic object and the regular object will refer to the |
| 2406 | same memory location for the variable. */ |
| 2407 | |
| 2408 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 2409 | BFD_ASSERT (s != NULL); |
| 2410 | |
| 2411 | /* We must generate a R_68K_COPY reloc to tell the dynamic linker to |
| 2412 | copy the initial value out of the dynamic object and into the |
| 2413 | runtime process image. We need to remember the offset into the |
| 2414 | .rela.bss section we are going to use. */ |
| 2415 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 2416 | { |
| 2417 | asection *srel; |
| 2418 | |
| 2419 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| 2420 | BFD_ASSERT (srel != NULL); |
| 2421 | srel->size += sizeof (Elf32_External_Rela); |
| 2422 | h->needs_copy = 1; |
| 2423 | } |
| 2424 | |
| 2425 | /* We need to figure out the alignment required for this symbol. I |
| 2426 | have no idea how ELF linkers handle this. */ |
| 2427 | power_of_two = bfd_log2 (h->size); |
| 2428 | if (power_of_two > 3) |
| 2429 | power_of_two = 3; |
| 2430 | |
| 2431 | /* Apply the required alignment. */ |
| 2432 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
| 2433 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
| 2434 | { |
| 2435 | if (!bfd_set_section_alignment (dynobj, s, power_of_two)) |
| 2436 | return FALSE; |
| 2437 | } |
| 2438 | |
| 2439 | /* Define the symbol as being at this point in the section. */ |
| 2440 | h->root.u.def.section = s; |
| 2441 | h->root.u.def.value = s->size; |
| 2442 | |
| 2443 | /* Increment the section size to make room for the symbol. */ |
| 2444 | s->size += h->size; |
| 2445 | |
| 2446 | return TRUE; |
| 2447 | } |
| 2448 | |
| 2449 | /* The bfin linker needs to keep track of the number of relocs that it |
| 2450 | decides to copy in check_relocs for each symbol. This is so that it |
| 2451 | can discard PC relative relocs if it doesn't need them when linking |
| 2452 | with -Bsymbolic. We store the information in a field extending the |
| 2453 | regular ELF linker hash table. */ |
| 2454 | |
| 2455 | /* This structure keeps track of the number of PC relative relocs we have |
| 2456 | copied for a given symbol. */ |
| 2457 | |
| 2458 | struct bfin_pcrel_relocs_copied |
| 2459 | { |
| 2460 | /* Next section. */ |
| 2461 | struct bfin_pcrel_relocs_copied *next; |
| 2462 | /* A section in dynobj. */ |
| 2463 | asection *section; |
| 2464 | /* Number of relocs copied in this section. */ |
| 2465 | bfd_size_type count; |
| 2466 | }; |
| 2467 | |
| 2468 | /* This function is called via elf_link_hash_traverse if we are |
| 2469 | creating a shared object. In the -Bsymbolic case it discards the |
| 2470 | space allocated to copy PC relative relocs against symbols which |
| 2471 | are defined in regular objects. For the normal shared case, it |
| 2472 | discards space for pc-relative relocs that have become local due to |
| 2473 | symbol visibility changes. We allocated space for them in the |
| 2474 | check_relocs routine, but we won't fill them in in the |
| 2475 | relocate_section routine. |
| 2476 | |
| 2477 | We also check whether any of the remaining relocations apply |
| 2478 | against a readonly section, and set the DF_TEXTREL flag in this |
| 2479 | case. */ |
| 2480 | |
| 2481 | static bfd_boolean |
| 2482 | bfin_discard_copies (struct elf_link_hash_entry *h, PTR inf) |
| 2483 | { |
| 2484 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| 2485 | struct bfin_pcrel_relocs_copied *s; |
| 2486 | |
| 2487 | if (h->root.type == bfd_link_hash_warning) |
| 2488 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 2489 | |
| 2490 | if (!h->def_regular || (!info->symbolic && !h->forced_local)) |
| 2491 | { |
| 2492 | if ((info->flags & DF_TEXTREL) == 0) |
| 2493 | { |
| 2494 | /* Look for relocations against read-only sections. */ |
| 2495 | for (s = bfin_hash_entry (h)->pcrel_relocs_copied; |
| 2496 | s != NULL; s = s->next) |
| 2497 | if ((s->section->flags & SEC_READONLY) != 0) |
| 2498 | { |
| 2499 | info->flags |= DF_TEXTREL; |
| 2500 | break; |
| 2501 | } |
| 2502 | } |
| 2503 | |
| 2504 | return TRUE; |
| 2505 | } |
| 2506 | |
| 2507 | for (s = bfin_hash_entry (h)->pcrel_relocs_copied; |
| 2508 | s != NULL; s = s->next) |
| 2509 | s->section->size -= s->count * sizeof (Elf32_External_Rela); |
| 2510 | |
| 2511 | return TRUE; |
| 2512 | } |
| 2513 | |
| 2514 | /* Set the sizes of the dynamic sections. */ |
| 2515 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" |
| 2516 | |
| 2517 | static bfd_boolean |
| 2518 | bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, |
| 2519 | struct bfd_link_info *info) |
| 2520 | { |
| 2521 | bfd *dynobj; |
| 2522 | asection *s; |
| 2523 | bfd_boolean relocs; |
| 2524 | |
| 2525 | dynobj = elf_hash_table (info)->dynobj; |
| 2526 | BFD_ASSERT (dynobj != NULL); |
| 2527 | |
| 2528 | if (elf_hash_table (info)->dynamic_sections_created) |
| 2529 | { |
| 2530 | /* Set the contents of the .interp section to the interpreter. */ |
| 2531 | if (info->executable) |
| 2532 | { |
| 2533 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 2534 | BFD_ASSERT (s != NULL); |
| 2535 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 2536 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 2537 | } |
| 2538 | } |
| 2539 | else |
| 2540 | { |
| 2541 | /* We may have created entries in the .rela.got section. |
| 2542 | However, if we are not creating the dynamic sections, we will |
| 2543 | not actually use these entries. Reset the size of .rela.got, |
| 2544 | which will cause it to get stripped from the output file |
| 2545 | below. */ |
| 2546 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 2547 | if (s != NULL) |
| 2548 | s->size = 0; |
| 2549 | } |
| 2550 | |
| 2551 | /* If this is a -Bsymbolic shared link, then we need to discard all |
| 2552 | PC relative relocs against symbols defined in a regular object. |
| 2553 | For the normal shared case we discard the PC relative relocs |
| 2554 | against symbols that have become local due to visibility changes. |
| 2555 | We allocated space for them in the check_relocs routine, but we |
| 2556 | will not fill them in in the relocate_section routine. */ |
| 2557 | if (info->shared) |
| 2558 | elf_link_hash_traverse (elf_hash_table (info), |
| 2559 | bfin_discard_copies, (PTR) info); |
| 2560 | |
| 2561 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 2562 | determined the sizes of the various dynamic sections. Allocate |
| 2563 | memory for them. */ |
| 2564 | relocs = FALSE; |
| 2565 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 2566 | { |
| 2567 | const char *name; |
| 2568 | bfd_boolean strip; |
| 2569 | |
| 2570 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 2571 | continue; |
| 2572 | |
| 2573 | /* It's OK to base decisions on the section name, because none |
| 2574 | of the dynobj section names depend upon the input files. */ |
| 2575 | name = bfd_get_section_name (dynobj, s); |
| 2576 | |
| 2577 | strip = FALSE; |
| 2578 | |
| 2579 | if (strncmp (name, ".rela", 5) == 0) |
| 2580 | { |
| 2581 | if (s->size == 0) |
| 2582 | { |
| 2583 | /* If we don't need this section, strip it from the |
| 2584 | output file. This is mostly to handle .rela.bss and |
| 2585 | .rela.plt. We must create both sections in |
| 2586 | create_dynamic_sections, because they must be created |
| 2587 | before the linker maps input sections to output |
| 2588 | sections. The linker does that before |
| 2589 | adjust_dynamic_symbol is called, and it is that |
| 2590 | function which decides whether anything needs to go |
| 2591 | into these sections. */ |
| 2592 | strip = TRUE; |
| 2593 | } |
| 2594 | else |
| 2595 | { |
| 2596 | relocs = TRUE; |
| 2597 | |
| 2598 | /* We use the reloc_count field as a counter if we need |
| 2599 | to copy relocs into the output file. */ |
| 2600 | s->reloc_count = 0; |
| 2601 | } |
| 2602 | } |
| 2603 | else if (strncmp (name, ".got", 4) != 0) |
| 2604 | { |
| 2605 | /* It's not one of our sections, so don't allocate space. */ |
| 2606 | continue; |
| 2607 | } |
| 2608 | |
| 2609 | if (strip) |
| 2610 | { |
| 2611 | s->flags |= SEC_EXCLUDE; |
| 2612 | continue; |
| 2613 | } |
| 2614 | |
| 2615 | /* Allocate memory for the section contents. */ |
| 2616 | /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. |
| 2617 | Unused entries should be reclaimed before the section's contents |
| 2618 | are written out, but at the moment this does not happen. Thus in |
| 2619 | order to prevent writing out garbage, we initialise the section's |
| 2620 | contents to zero. */ |
| 2621 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| 2622 | if (s->contents == NULL && s->size != 0) |
| 2623 | return FALSE; |
| 2624 | } |
| 2625 | |
| 2626 | if (elf_hash_table (info)->dynamic_sections_created) |
| 2627 | { |
| 2628 | /* Add some entries to the .dynamic section. We fill in the |
| 2629 | values later, in bfin_finish_dynamic_sections, but we |
| 2630 | must add the entries now so that we get the correct size for |
| 2631 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 2632 | dynamic linker and used by the debugger. */ |
| 2633 | #define add_dynamic_entry(TAG, VAL) \ |
| 2634 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 2635 | |
| 2636 | if (!info->shared) |
| 2637 | { |
| 2638 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 2639 | return FALSE; |
| 2640 | } |
| 2641 | |
| 2642 | |
| 2643 | if (relocs) |
| 2644 | { |
| 2645 | if (!add_dynamic_entry (DT_RELA, 0) |
| 2646 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 2647 | || !add_dynamic_entry (DT_RELAENT, |
| 2648 | sizeof (Elf32_External_Rela))) |
| 2649 | return FALSE; |
| 2650 | } |
| 2651 | |
| 2652 | if ((info->flags & DF_TEXTREL) != 0) |
| 2653 | { |
| 2654 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 2655 | return FALSE; |
| 2656 | } |
| 2657 | } |
| 2658 | #undef add_dynamic_entry |
| 2659 | |
| 2660 | return TRUE; |
| 2661 | } |
| 2662 | |
| 2663 | /* Given a .data section and a .emreloc in-memory section, store |
| 2664 | relocation information into the .emreloc section which can be |
| 2665 | used at runtime to relocate the section. This is called by the |
| 2666 | linker when the --embedded-relocs switch is used. This is called |
| 2667 | after the add_symbols entry point has been called for all the |
| 2668 | objects, and before the final_link entry point is called. */ |
| 2669 | |
| 2670 | bfd_boolean |
| 2671 | bfd_bfin_elf32_create_embedded_relocs ( |
| 2672 | bfd *abfd, |
| 2673 | struct bfd_link_info *info, |
| 2674 | asection *datasec, |
| 2675 | asection *relsec, |
| 2676 | char **errmsg) |
| 2677 | { |
| 2678 | Elf_Internal_Shdr *symtab_hdr; |
| 2679 | Elf_Internal_Sym *isymbuf = NULL; |
| 2680 | Elf_Internal_Rela *internal_relocs = NULL; |
| 2681 | Elf_Internal_Rela *irel, *irelend; |
| 2682 | bfd_byte *p; |
| 2683 | bfd_size_type amt; |
| 2684 | |
| 2685 | BFD_ASSERT (! info->relocatable); |
| 2686 | |
| 2687 | *errmsg = NULL; |
| 2688 | |
| 2689 | if (datasec->reloc_count == 0) |
| 2690 | return TRUE; |
| 2691 | |
| 2692 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 2693 | |
| 2694 | /* Get a copy of the native relocations. */ |
| 2695 | internal_relocs = (_bfd_elf_link_read_relocs |
| 2696 | (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
| 2697 | info->keep_memory)); |
| 2698 | if (internal_relocs == NULL) |
| 2699 | goto error_return; |
| 2700 | |
| 2701 | amt = (bfd_size_type) datasec->reloc_count * 12; |
| 2702 | relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt); |
| 2703 | if (relsec->contents == NULL) |
| 2704 | goto error_return; |
| 2705 | |
| 2706 | p = relsec->contents; |
| 2707 | |
| 2708 | irelend = internal_relocs + datasec->reloc_count; |
| 2709 | for (irel = internal_relocs; irel < irelend; irel++, p += 12) |
| 2710 | { |
| 2711 | asection *targetsec; |
| 2712 | |
| 2713 | /* We are going to write a four byte longword into the runtime |
| 2714 | reloc section. The longword will be the address in the data |
| 2715 | section which must be relocated. It is followed by the name |
| 2716 | of the target section NUL-padded or truncated to 8 |
| 2717 | characters. */ |
| 2718 | |
| 2719 | /* We can only relocate absolute longword relocs at run time. */ |
| 2720 | if (ELF32_R_TYPE (irel->r_info) != (int) R_byte4_data) |
| 2721 | { |
| 2722 | *errmsg = _("unsupported reloc type"); |
| 2723 | bfd_set_error (bfd_error_bad_value); |
| 2724 | goto error_return; |
| 2725 | } |
| 2726 | |
| 2727 | /* Get the target section referred to by the reloc. */ |
| 2728 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 2729 | { |
| 2730 | /* A local symbol. */ |
| 2731 | Elf_Internal_Sym *isym; |
| 2732 | |
| 2733 | /* Read this BFD's local symbols if we haven't done so already. */ |
| 2734 | if (isymbuf == NULL) |
| 2735 | { |
| 2736 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 2737 | if (isymbuf == NULL) |
| 2738 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 2739 | symtab_hdr->sh_info, 0, |
| 2740 | NULL, NULL, NULL); |
| 2741 | if (isymbuf == NULL) |
| 2742 | goto error_return; |
| 2743 | } |
| 2744 | |
| 2745 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 2746 | targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 2747 | } |
| 2748 | else |
| 2749 | { |
| 2750 | unsigned long indx; |
| 2751 | struct elf_link_hash_entry *h; |
| 2752 | |
| 2753 | /* An external symbol. */ |
| 2754 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 2755 | h = elf_sym_hashes (abfd)[indx]; |
| 2756 | BFD_ASSERT (h != NULL); |
| 2757 | if (h->root.type == bfd_link_hash_defined |
| 2758 | || h->root.type == bfd_link_hash_defweak) |
| 2759 | targetsec = h->root.u.def.section; |
| 2760 | else |
| 2761 | targetsec = NULL; |
| 2762 | } |
| 2763 | |
| 2764 | bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p); |
| 2765 | memset (p + 4, 0, 8); |
| 2766 | if (targetsec != NULL) |
| 2767 | strncpy ((char *) p + 4, targetsec->output_section->name, 8); |
| 2768 | } |
| 2769 | |
| 2770 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 2771 | free (isymbuf); |
| 2772 | if (internal_relocs != NULL |
| 2773 | && elf_section_data (datasec)->relocs != internal_relocs) |
| 2774 | free (internal_relocs); |
| 2775 | return TRUE; |
| 2776 | |
| 2777 | error_return: |
| 2778 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 2779 | free (isymbuf); |
| 2780 | if (internal_relocs != NULL |
| 2781 | && elf_section_data (datasec)->relocs != internal_relocs) |
| 2782 | free (internal_relocs); |
| 2783 | return FALSE; |
| 2784 | } |
| 2785 | |
| 2786 | #define TARGET_LITTLE_SYM bfd_elf32_bfin_vec |
| 2787 | #define TARGET_LITTLE_NAME "elf32-bfin" |
| 2788 | #define ELF_ARCH bfd_arch_bfin |
| 2789 | #define ELF_MACHINE_CODE EM_BLACKFIN |
| 2790 | #define ELF_MAXPAGESIZE 0x1000 |
| 2791 | #define elf_symbol_leading_char '_' |
| 2792 | |
| 2793 | #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup |
| 2794 | #define elf_info_to_howto bfin_info_to_howto |
| 2795 | #define elf_info_to_howto_rel 0 |
| 2796 | |
| 2797 | #define bfd_elf32_bfd_is_local_label_name \ |
| 2798 | bfin_is_local_label_name |
| 2799 | #define bfin_hash_table(p) \ |
| 2800 | ((struct bfin_link_hash_table *) (p)->hash) |
| 2801 | |
| 2802 | |
| 2803 | |
| 2804 | #define elf_backend_create_dynamic_sections \ |
| 2805 | _bfd_elf_create_dynamic_sections |
| 2806 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 2807 | bfin_link_hash_table_create |
| 2808 | #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link |
| 2809 | |
| 2810 | #define elf_backend_check_relocs bfin_check_relocs |
| 2811 | #define elf_backend_adjust_dynamic_symbol \ |
| 2812 | bfin_adjust_dynamic_symbol |
| 2813 | #define elf_backend_size_dynamic_sections \ |
| 2814 | bfin_size_dynamic_sections |
| 2815 | #define elf_backend_relocate_section bfin_relocate_section |
| 2816 | #define elf_backend_finish_dynamic_symbol \ |
| 2817 | bfin_finish_dynamic_symbol |
| 2818 | #define elf_backend_finish_dynamic_sections \ |
| 2819 | bfin_finish_dynamic_sections |
| 2820 | #define elf_backend_gc_mark_hook bfin_gc_mark_hook |
| 2821 | #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook |
| 2822 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
| 2823 | elf32_bfin_merge_private_bfd_data |
| 2824 | #define bfd_elf32_bfd_set_private_flags \ |
| 2825 | elf32_bfin_set_private_flags |
| 2826 | #define bfd_elf32_bfd_print_private_bfd_data \ |
| 2827 | elf32_bfin_print_private_bfd_data |
| 2828 | #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class |
| 2829 | #define elf_backend_can_gc_sections 1 |
| 2830 | #define elf_backend_can_refcount 1 |
| 2831 | #define elf_backend_want_got_plt 0 |
| 2832 | #define elf_backend_plt_readonly 1 |
| 2833 | #define elf_backend_want_plt_sym 0 |
| 2834 | #define elf_backend_got_header_size 12 |
| 2835 | #define elf_backend_rela_normal 1 |
| 2836 | |
| 2837 | |
| 2838 | #include "elf32-target.h" |