| 1 | /* ADI Blackfin BFD support for 32-bit ELF. |
| 2 | Copyright 2005, 2006, 2007 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 | #include "elf/dwarf2.h" |
| 27 | #include "hashtab.h" |
| 28 | |
| 29 | /* FUNCTION : bfin_pltpc_reloc |
| 30 | ABSTRACT : TODO : figure out how to handle pltpc relocs. */ |
| 31 | static bfd_reloc_status_type |
| 32 | bfin_pltpc_reloc ( |
| 33 | bfd *abfd ATTRIBUTE_UNUSED, |
| 34 | arelent *reloc_entry ATTRIBUTE_UNUSED, |
| 35 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 36 | PTR data ATTRIBUTE_UNUSED, |
| 37 | asection *input_section ATTRIBUTE_UNUSED, |
| 38 | bfd *output_bfd ATTRIBUTE_UNUSED, |
| 39 | char **error_message ATTRIBUTE_UNUSED) |
| 40 | { |
| 41 | bfd_reloc_status_type flag = bfd_reloc_ok; |
| 42 | return flag; |
| 43 | } |
| 44 | \f |
| 45 | |
| 46 | static bfd_reloc_status_type |
| 47 | bfin_pcrel24_reloc (bfd *abfd, |
| 48 | arelent *reloc_entry, |
| 49 | asymbol *symbol, |
| 50 | PTR data, |
| 51 | asection *input_section, |
| 52 | bfd *output_bfd, |
| 53 | char **error_message ATTRIBUTE_UNUSED) |
| 54 | { |
| 55 | bfd_vma relocation; |
| 56 | bfd_size_type addr = reloc_entry->address; |
| 57 | bfd_vma output_base = 0; |
| 58 | reloc_howto_type *howto = reloc_entry->howto; |
| 59 | asection *output_section; |
| 60 | bfd_boolean relocatable = (output_bfd != NULL); |
| 61 | |
| 62 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 63 | return bfd_reloc_outofrange; |
| 64 | |
| 65 | if (bfd_is_und_section (symbol->section) |
| 66 | && (symbol->flags & BSF_WEAK) == 0 |
| 67 | && !relocatable) |
| 68 | return bfd_reloc_undefined; |
| 69 | |
| 70 | if (bfd_is_com_section (symbol->section)) |
| 71 | relocation = 0; |
| 72 | else |
| 73 | relocation = symbol->value; |
| 74 | |
| 75 | output_section = symbol->section->output_section; |
| 76 | |
| 77 | if (relocatable) |
| 78 | output_base = 0; |
| 79 | else |
| 80 | output_base = output_section->vma; |
| 81 | |
| 82 | if (!relocatable || !strcmp (symbol->name, symbol->section->name)) |
| 83 | relocation += output_base + symbol->section->output_offset; |
| 84 | |
| 85 | if (!relocatable && !strcmp (symbol->name, symbol->section->name)) |
| 86 | relocation += reloc_entry->addend; |
| 87 | |
| 88 | relocation -= input_section->output_section->vma + input_section->output_offset; |
| 89 | relocation -= reloc_entry->address; |
| 90 | |
| 91 | if (howto->complain_on_overflow != complain_overflow_dont) |
| 92 | { |
| 93 | bfd_reloc_status_type status; |
| 94 | status = bfd_check_overflow (howto->complain_on_overflow, |
| 95 | howto->bitsize, |
| 96 | howto->rightshift, |
| 97 | bfd_arch_bits_per_address(abfd), |
| 98 | relocation); |
| 99 | if (status != bfd_reloc_ok) |
| 100 | return status; |
| 101 | } |
| 102 | |
| 103 | /* if rightshift is 1 and the number odd, return error. */ |
| 104 | if (howto->rightshift && (relocation & 0x01)) |
| 105 | { |
| 106 | fprintf(stderr, "relocation should be even number\n"); |
| 107 | return bfd_reloc_overflow; |
| 108 | } |
| 109 | |
| 110 | relocation >>= (bfd_vma) howto->rightshift; |
| 111 | /* Shift everything up to where it's going to be used. */ |
| 112 | |
| 113 | relocation <<= (bfd_vma) howto->bitpos; |
| 114 | |
| 115 | if (relocatable) |
| 116 | { |
| 117 | reloc_entry->address += input_section->output_offset; |
| 118 | reloc_entry->addend += symbol->section->output_offset; |
| 119 | } |
| 120 | |
| 121 | { |
| 122 | short x; |
| 123 | |
| 124 | /* We are getting reloc_entry->address 2 byte off from |
| 125 | the start of instruction. Assuming absolute postion |
| 126 | of the reloc data. But, following code had been written assuming |
| 127 | reloc address is starting at begining of instruction. |
| 128 | To compensate that I have increased the value of |
| 129 | relocation by 1 (effectively 2) and used the addr -2 instead of addr. */ |
| 130 | |
| 131 | relocation += 1; |
| 132 | x = bfd_get_16 (abfd, (bfd_byte *) data + addr - 2); |
| 133 | x = (x & 0xff00) | ((relocation >> 16) & 0xff); |
| 134 | bfd_put_16 (abfd, x, (unsigned char *) data + addr - 2); |
| 135 | |
| 136 | x = bfd_get_16 (abfd, (bfd_byte *) data + addr); |
| 137 | x = relocation & 0xFFFF; |
| 138 | bfd_put_16 (abfd, x, (unsigned char *) data + addr ); |
| 139 | } |
| 140 | return bfd_reloc_ok; |
| 141 | } |
| 142 | |
| 143 | static bfd_reloc_status_type |
| 144 | bfin_imm16_reloc (bfd *abfd, |
| 145 | arelent *reloc_entry, |
| 146 | asymbol *symbol, |
| 147 | PTR data, |
| 148 | asection *input_section, |
| 149 | bfd *output_bfd, |
| 150 | char **error_message ATTRIBUTE_UNUSED) |
| 151 | { |
| 152 | bfd_vma relocation, x; |
| 153 | bfd_size_type reloc_addr = reloc_entry->address; |
| 154 | bfd_vma output_base = 0; |
| 155 | reloc_howto_type *howto = reloc_entry->howto; |
| 156 | asection *output_section; |
| 157 | bfd_boolean relocatable = (output_bfd != NULL); |
| 158 | |
| 159 | /* Is the address of the relocation really within the section? */ |
| 160 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 161 | return bfd_reloc_outofrange; |
| 162 | |
| 163 | if (bfd_is_und_section (symbol->section) |
| 164 | && (symbol->flags & BSF_WEAK) == 0 |
| 165 | && !relocatable) |
| 166 | return bfd_reloc_undefined; |
| 167 | |
| 168 | output_section = symbol->section->output_section; |
| 169 | relocation = symbol->value; |
| 170 | |
| 171 | /* Convert input-section-relative symbol value to absolute. */ |
| 172 | if (relocatable) |
| 173 | output_base = 0; |
| 174 | else |
| 175 | output_base = output_section->vma; |
| 176 | |
| 177 | if (!relocatable || !strcmp (symbol->name, symbol->section->name)) |
| 178 | relocation += output_base + symbol->section->output_offset; |
| 179 | |
| 180 | /* Add in supplied addend. */ |
| 181 | relocation += reloc_entry->addend; |
| 182 | |
| 183 | if (relocatable) |
| 184 | { |
| 185 | reloc_entry->address += input_section->output_offset; |
| 186 | reloc_entry->addend += symbol->section->output_offset; |
| 187 | } |
| 188 | else |
| 189 | { |
| 190 | reloc_entry->addend = 0; |
| 191 | } |
| 192 | |
| 193 | if (howto->complain_on_overflow != complain_overflow_dont) |
| 194 | { |
| 195 | bfd_reloc_status_type flag; |
| 196 | flag = bfd_check_overflow (howto->complain_on_overflow, |
| 197 | howto->bitsize, |
| 198 | howto->rightshift, |
| 199 | bfd_arch_bits_per_address(abfd), |
| 200 | relocation); |
| 201 | if (flag != bfd_reloc_ok) |
| 202 | return flag; |
| 203 | } |
| 204 | |
| 205 | /* Here the variable relocation holds the final address of the |
| 206 | symbol we are relocating against, plus any addend. */ |
| 207 | |
| 208 | relocation >>= (bfd_vma) howto->rightshift; |
| 209 | x = relocation; |
| 210 | bfd_put_16 (abfd, x, (unsigned char *) data + reloc_addr); |
| 211 | return bfd_reloc_ok; |
| 212 | } |
| 213 | |
| 214 | |
| 215 | static bfd_reloc_status_type |
| 216 | bfin_byte4_reloc (bfd *abfd, |
| 217 | arelent *reloc_entry, |
| 218 | asymbol *symbol, |
| 219 | PTR data, |
| 220 | asection *input_section, |
| 221 | bfd *output_bfd, |
| 222 | char **error_message ATTRIBUTE_UNUSED) |
| 223 | { |
| 224 | bfd_vma relocation, x; |
| 225 | bfd_size_type addr = reloc_entry->address; |
| 226 | bfd_vma output_base = 0; |
| 227 | asection *output_section; |
| 228 | bfd_boolean relocatable = (output_bfd != NULL); |
| 229 | |
| 230 | /* Is the address of the relocation really within the section? */ |
| 231 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 232 | return bfd_reloc_outofrange; |
| 233 | |
| 234 | if (bfd_is_und_section (symbol->section) |
| 235 | && (symbol->flags & BSF_WEAK) == 0 |
| 236 | && !relocatable) |
| 237 | return bfd_reloc_undefined; |
| 238 | |
| 239 | output_section = symbol->section->output_section; |
| 240 | relocation = symbol->value; |
| 241 | /* Convert input-section-relative symbol value to absolute. */ |
| 242 | if (relocatable) |
| 243 | output_base = 0; |
| 244 | else |
| 245 | output_base = output_section->vma; |
| 246 | |
| 247 | if ((symbol->name |
| 248 | && symbol->section->name |
| 249 | && !strcmp (symbol->name, symbol->section->name)) |
| 250 | || !relocatable) |
| 251 | { |
| 252 | relocation += output_base + symbol->section->output_offset; |
| 253 | } |
| 254 | |
| 255 | relocation += reloc_entry->addend; |
| 256 | |
| 257 | if (relocatable) |
| 258 | { |
| 259 | /* This output will be relocatable ... like ld -r. */ |
| 260 | reloc_entry->address += input_section->output_offset; |
| 261 | reloc_entry->addend += symbol->section->output_offset; |
| 262 | } |
| 263 | else |
| 264 | { |
| 265 | reloc_entry->addend = 0; |
| 266 | } |
| 267 | |
| 268 | /* Here the variable relocation holds the final address of the |
| 269 | symbol we are relocating against, plus any addend. */ |
| 270 | x = relocation & 0xFFFF0000; |
| 271 | x >>=16; |
| 272 | bfd_put_16 (abfd, x, (unsigned char *) data + addr + 2); |
| 273 | |
| 274 | x = relocation & 0x0000FFFF; |
| 275 | bfd_put_16 (abfd, x, (unsigned char *) data + addr); |
| 276 | return bfd_reloc_ok; |
| 277 | } |
| 278 | |
| 279 | /* bfin_bfd_reloc handles the blackfin arithmetic relocations. |
| 280 | Use this instead of bfd_perform_relocation. */ |
| 281 | static bfd_reloc_status_type |
| 282 | bfin_bfd_reloc (bfd *abfd, |
| 283 | arelent *reloc_entry, |
| 284 | asymbol *symbol, |
| 285 | PTR data, |
| 286 | asection *input_section, |
| 287 | bfd *output_bfd, |
| 288 | char **error_message ATTRIBUTE_UNUSED) |
| 289 | { |
| 290 | bfd_vma relocation; |
| 291 | bfd_size_type addr = reloc_entry->address; |
| 292 | bfd_vma output_base = 0; |
| 293 | reloc_howto_type *howto = reloc_entry->howto; |
| 294 | asection *output_section; |
| 295 | bfd_boolean relocatable = (output_bfd != NULL); |
| 296 | |
| 297 | /* Is the address of the relocation really within the section? */ |
| 298 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 299 | return bfd_reloc_outofrange; |
| 300 | |
| 301 | if (bfd_is_und_section (symbol->section) |
| 302 | && (symbol->flags & BSF_WEAK) == 0 |
| 303 | && !relocatable) |
| 304 | return bfd_reloc_undefined; |
| 305 | |
| 306 | /* Get symbol value. (Common symbols are special.) */ |
| 307 | if (bfd_is_com_section (symbol->section)) |
| 308 | relocation = 0; |
| 309 | else |
| 310 | relocation = symbol->value; |
| 311 | |
| 312 | output_section = symbol->section->output_section; |
| 313 | |
| 314 | /* Convert input-section-relative symbol value to absolute. */ |
| 315 | if (relocatable) |
| 316 | output_base = 0; |
| 317 | else |
| 318 | output_base = output_section->vma; |
| 319 | |
| 320 | if (!relocatable || !strcmp (symbol->name, symbol->section->name)) |
| 321 | relocation += output_base + symbol->section->output_offset; |
| 322 | |
| 323 | if (!relocatable && !strcmp (symbol->name, symbol->section->name)) |
| 324 | { |
| 325 | /* Add in supplied addend. */ |
| 326 | relocation += reloc_entry->addend; |
| 327 | } |
| 328 | |
| 329 | /* Here the variable relocation holds the final address of the |
| 330 | symbol we are relocating against, plus any addend. */ |
| 331 | |
| 332 | if (howto->pc_relative == TRUE) |
| 333 | { |
| 334 | relocation -= input_section->output_section->vma + input_section->output_offset; |
| 335 | |
| 336 | if (howto->pcrel_offset == TRUE) |
| 337 | relocation -= reloc_entry->address; |
| 338 | } |
| 339 | |
| 340 | if (relocatable) |
| 341 | { |
| 342 | reloc_entry->address += input_section->output_offset; |
| 343 | reloc_entry->addend += symbol->section->output_offset; |
| 344 | } |
| 345 | |
| 346 | if (howto->complain_on_overflow != complain_overflow_dont) |
| 347 | { |
| 348 | bfd_reloc_status_type status; |
| 349 | |
| 350 | status = bfd_check_overflow (howto->complain_on_overflow, |
| 351 | howto->bitsize, |
| 352 | howto->rightshift, |
| 353 | bfd_arch_bits_per_address(abfd), |
| 354 | relocation); |
| 355 | if (status != bfd_reloc_ok) |
| 356 | return status; |
| 357 | } |
| 358 | |
| 359 | /* If rightshift is 1 and the number odd, return error. */ |
| 360 | if (howto->rightshift && (relocation & 0x01)) |
| 361 | { |
| 362 | fprintf(stderr, "relocation should be even number\n"); |
| 363 | return bfd_reloc_overflow; |
| 364 | } |
| 365 | |
| 366 | relocation >>= (bfd_vma) howto->rightshift; |
| 367 | |
| 368 | /* Shift everything up to where it's going to be used. */ |
| 369 | |
| 370 | relocation <<= (bfd_vma) howto->bitpos; |
| 371 | |
| 372 | #define DOIT(x) \ |
| 373 | x = ( (x & ~howto->dst_mask) | (relocation & howto->dst_mask)) |
| 374 | |
| 375 | /* handle 8 and 16 bit relocations here. */ |
| 376 | switch (howto->size) |
| 377 | { |
| 378 | case 0: |
| 379 | { |
| 380 | char x = bfd_get_8 (abfd, (char *) data + addr); |
| 381 | DOIT (x); |
| 382 | bfd_put_8 (abfd, x, (unsigned char *) data + addr); |
| 383 | } |
| 384 | break; |
| 385 | |
| 386 | case 1: |
| 387 | { |
| 388 | unsigned short x = bfd_get_16 (abfd, (bfd_byte *) data + addr); |
| 389 | DOIT (x); |
| 390 | bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data + addr); |
| 391 | } |
| 392 | break; |
| 393 | |
| 394 | default: |
| 395 | return bfd_reloc_other; |
| 396 | } |
| 397 | |
| 398 | return bfd_reloc_ok; |
| 399 | } |
| 400 | |
| 401 | /* HOWTO Table for blackfin. |
| 402 | Blackfin relocations are fairly complicated. |
| 403 | Some of the salient features are |
| 404 | a. Even numbered offsets. A number of (not all) relocations are |
| 405 | even numbered. This means that the rightmost bit is not stored. |
| 406 | Needs to right shift by 1 and check to see if value is not odd |
| 407 | b. A relocation can be an expression. An expression takes on |
| 408 | a variety of relocations arranged in a stack. |
| 409 | As a result, we cannot use the standard generic function as special |
| 410 | function. We will have our own, which is very similar to the standard |
| 411 | generic function except that it understands how to get the value from |
| 412 | the relocation stack. . */ |
| 413 | |
| 414 | #define BFIN_RELOC_MIN 0 |
| 415 | #define BFIN_RELOC_MAX 0x21 |
| 416 | #define BFIN_GNUEXT_RELOC_MIN 0x40 |
| 417 | #define BFIN_GNUEXT_RELOC_MAX 0x43 |
| 418 | #define BFIN_ARELOC_MIN 0xE0 |
| 419 | #define BFIN_ARELOC_MAX 0xF3 |
| 420 | |
| 421 | static reloc_howto_type bfin_howto_table [] = |
| 422 | { |
| 423 | /* This reloc does nothing. . */ |
| 424 | HOWTO (R_unused0, /* type. */ |
| 425 | 0, /* rightshift. */ |
| 426 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 427 | 32, /* bitsize. */ |
| 428 | FALSE, /* pc_relative. */ |
| 429 | 0, /* bitpos. */ |
| 430 | complain_overflow_bitfield, /* complain_on_overflow. */ |
| 431 | bfd_elf_generic_reloc, /* special_function. */ |
| 432 | "R_unused0", /* name. */ |
| 433 | FALSE, /* partial_inplace. */ |
| 434 | 0, /* src_mask. */ |
| 435 | 0, /* dst_mask. */ |
| 436 | FALSE), /* pcrel_offset. */ |
| 437 | |
| 438 | HOWTO (R_pcrel5m2, /* type. */ |
| 439 | 1, /* rightshift. */ |
| 440 | 1, /* size (0 = byte, 1 = short, 2 = long).. */ |
| 441 | 4, /* bitsize. */ |
| 442 | TRUE, /* pc_relative. */ |
| 443 | 0, /* bitpos. */ |
| 444 | complain_overflow_unsigned, /* complain_on_overflow. */ |
| 445 | bfin_bfd_reloc, /* special_function. */ |
| 446 | "R_pcrel5m2", /* name. */ |
| 447 | FALSE, /* partial_inplace. */ |
| 448 | 0, /* src_mask. */ |
| 449 | 0x0000000F, /* dst_mask. */ |
| 450 | FALSE), /* pcrel_offset. */ |
| 451 | |
| 452 | HOWTO (R_unused1, /* type. */ |
| 453 | 0, /* rightshift. */ |
| 454 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 455 | 32, /* bitsize. */ |
| 456 | FALSE, /* pc_relative. */ |
| 457 | 0, /* bitpos. */ |
| 458 | complain_overflow_bitfield, /* complain_on_overflow. */ |
| 459 | bfd_elf_generic_reloc, /* special_function. */ |
| 460 | "R_unused1", /* name. */ |
| 461 | FALSE, /* partial_inplace. */ |
| 462 | 0, /* src_mask. */ |
| 463 | 0, /* dst_mask. */ |
| 464 | FALSE), /* pcrel_offset. */ |
| 465 | |
| 466 | HOWTO (R_pcrel10, /* type. */ |
| 467 | 1, /* rightshift. */ |
| 468 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 469 | 10, /* bitsize. */ |
| 470 | TRUE, /* pc_relative. */ |
| 471 | 0, /* bitpos. */ |
| 472 | complain_overflow_signed, /* complain_on_overflow. */ |
| 473 | bfin_bfd_reloc, /* special_function. */ |
| 474 | "R_pcrel10", /* name. */ |
| 475 | FALSE, /* partial_inplace. */ |
| 476 | 0, /* src_mask. */ |
| 477 | 0x000003FF, /* dst_mask. */ |
| 478 | TRUE), /* pcrel_offset. */ |
| 479 | |
| 480 | HOWTO (R_pcrel12_jump, /* type. */ |
| 481 | 1, /* rightshift. */ |
| 482 | /* the offset is actually 13 bit |
| 483 | aligned on a word boundary so |
| 484 | only 12 bits have to be used. |
| 485 | Right shift the rightmost bit.. */ |
| 486 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 487 | 12, /* bitsize. */ |
| 488 | TRUE, /* pc_relative. */ |
| 489 | 0, /* bitpos. */ |
| 490 | complain_overflow_signed, /* complain_on_overflow. */ |
| 491 | bfin_bfd_reloc, /* special_function. */ |
| 492 | "R_pcrel12_jump", /* name. */ |
| 493 | FALSE, /* partial_inplace. */ |
| 494 | 0, /* src_mask. */ |
| 495 | 0x0FFF, /* dst_mask. */ |
| 496 | TRUE), /* pcrel_offset. */ |
| 497 | |
| 498 | HOWTO (R_rimm16, /* type. */ |
| 499 | 0, /* rightshift. */ |
| 500 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 501 | 16, /* bitsize. */ |
| 502 | FALSE, /* pc_relative. */ |
| 503 | 0, /* bitpos. */ |
| 504 | complain_overflow_signed, /* complain_on_overflow. */ |
| 505 | bfin_imm16_reloc, /* special_function. */ |
| 506 | "R_rimm16", /* name. */ |
| 507 | FALSE, /* partial_inplace. */ |
| 508 | 0, /* src_mask. */ |
| 509 | 0x0000FFFF, /* dst_mask. */ |
| 510 | TRUE), /* pcrel_offset. */ |
| 511 | |
| 512 | HOWTO (R_luimm16, /* type. */ |
| 513 | 0, /* rightshift. */ |
| 514 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 515 | 16, /* bitsize. */ |
| 516 | FALSE, /* pc_relative. */ |
| 517 | 0, /* bitpos. */ |
| 518 | complain_overflow_dont, /* complain_on_overflow. */ |
| 519 | bfin_imm16_reloc, /* special_function. */ |
| 520 | "R_luimm16", /* name. */ |
| 521 | FALSE, /* partial_inplace. */ |
| 522 | 0, /* src_mask. */ |
| 523 | 0x0000FFFF, /* dst_mask. */ |
| 524 | TRUE), /* pcrel_offset. */ |
| 525 | |
| 526 | HOWTO (R_huimm16, /* type. */ |
| 527 | 16, /* rightshift. */ |
| 528 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 529 | 16, /* bitsize. */ |
| 530 | FALSE, /* pc_relative. */ |
| 531 | 0, /* bitpos. */ |
| 532 | complain_overflow_unsigned, /* complain_on_overflow. */ |
| 533 | bfin_imm16_reloc, /* special_function. */ |
| 534 | "R_huimm16", /* name. */ |
| 535 | FALSE, /* partial_inplace. */ |
| 536 | 0, /* src_mask. */ |
| 537 | 0x0000FFFF, /* dst_mask. */ |
| 538 | TRUE), /* pcrel_offset. */ |
| 539 | |
| 540 | HOWTO (R_pcrel12_jump_s, /* type. */ |
| 541 | 1, /* rightshift. */ |
| 542 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 543 | 12, /* bitsize. */ |
| 544 | TRUE, /* pc_relative. */ |
| 545 | 0, /* bitpos. */ |
| 546 | complain_overflow_signed, /* complain_on_overflow. */ |
| 547 | bfin_bfd_reloc, /* special_function. */ |
| 548 | "R_pcrel12_jump_s", /* name. */ |
| 549 | FALSE, /* partial_inplace. */ |
| 550 | 0, /* src_mask. */ |
| 551 | 0x00000FFF, /* dst_mask. */ |
| 552 | TRUE), /* pcrel_offset. */ |
| 553 | |
| 554 | HOWTO (R_pcrel24_jump_x, /* type. */ |
| 555 | 1, /* rightshift. */ |
| 556 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 557 | 24, /* bitsize. */ |
| 558 | TRUE, /* pc_relative. */ |
| 559 | 0, /* bitpos. */ |
| 560 | complain_overflow_signed, /* complain_on_overflow. */ |
| 561 | bfin_pcrel24_reloc, /* special_function. */ |
| 562 | "R_pcrel24_jump_x", /* name. */ |
| 563 | FALSE, /* partial_inplace. */ |
| 564 | 0, /* src_mask. */ |
| 565 | 0x00FFFFFF, /* dst_mask. */ |
| 566 | TRUE), /* pcrel_offset. */ |
| 567 | |
| 568 | HOWTO (R_pcrel24, /* type. */ |
| 569 | 1, /* rightshift. */ |
| 570 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 571 | 24, /* bitsize. */ |
| 572 | TRUE, /* pc_relative. */ |
| 573 | 0, /* bitpos. */ |
| 574 | complain_overflow_signed, /* complain_on_overflow. */ |
| 575 | bfin_pcrel24_reloc, /* special_function. */ |
| 576 | "R_pcrel24", /* name. */ |
| 577 | FALSE, /* partial_inplace. */ |
| 578 | 0, /* src_mask. */ |
| 579 | 0x00FFFFFF, /* dst_mask. */ |
| 580 | TRUE), /* pcrel_offset. */ |
| 581 | |
| 582 | HOWTO (R_unusedb, /* type. */ |
| 583 | 0, /* rightshift. */ |
| 584 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 585 | 32, /* bitsize. */ |
| 586 | FALSE, /* pc_relative. */ |
| 587 | 0, /* bitpos. */ |
| 588 | complain_overflow_dont, /* complain_on_overflow. */ |
| 589 | bfd_elf_generic_reloc, /* special_function. */ |
| 590 | "R_unusedb", /* name. */ |
| 591 | FALSE, /* partial_inplace. */ |
| 592 | 0, /* src_mask. */ |
| 593 | 0, /* dst_mask. */ |
| 594 | FALSE), /* pcrel_offset. */ |
| 595 | |
| 596 | HOWTO (R_unusedc, /* type. */ |
| 597 | 0, /* rightshift. */ |
| 598 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 599 | 32, /* bitsize. */ |
| 600 | FALSE, /* pc_relative. */ |
| 601 | 0, /* bitpos. */ |
| 602 | complain_overflow_dont, /* complain_on_overflow. */ |
| 603 | bfd_elf_generic_reloc, /* special_function. */ |
| 604 | "R_unusedc", /* name. */ |
| 605 | FALSE, /* partial_inplace. */ |
| 606 | 0, /* src_mask. */ |
| 607 | 0, /* dst_mask. */ |
| 608 | FALSE), /* pcrel_offset. */ |
| 609 | |
| 610 | HOWTO (R_pcrel24_jump_l, /* type. */ |
| 611 | 1, /* rightshift. */ |
| 612 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 613 | 24, /* bitsize. */ |
| 614 | TRUE, /* pc_relative. */ |
| 615 | 0, /* bitpos. */ |
| 616 | complain_overflow_signed, /* complain_on_overflow. */ |
| 617 | bfin_pcrel24_reloc, /* special_function. */ |
| 618 | "R_pcrel24_jump_l", /* name. */ |
| 619 | FALSE, /* partial_inplace. */ |
| 620 | 0, /* src_mask. */ |
| 621 | 0x00FFFFFF, /* dst_mask. */ |
| 622 | TRUE), /* pcrel_offset. */ |
| 623 | |
| 624 | HOWTO (R_pcrel24_call_x, /* type. */ |
| 625 | 1, /* rightshift. */ |
| 626 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 627 | 24, /* bitsize. */ |
| 628 | TRUE, /* pc_relative. */ |
| 629 | 0, /* bitpos. */ |
| 630 | complain_overflow_signed, /* complain_on_overflow. */ |
| 631 | bfin_pcrel24_reloc, /* special_function. */ |
| 632 | "R_pcrel24_call_x", /* name. */ |
| 633 | FALSE, /* partial_inplace. */ |
| 634 | 0, /* src_mask. */ |
| 635 | 0x00FFFFFF, /* dst_mask. */ |
| 636 | TRUE), /* pcrel_offset. */ |
| 637 | |
| 638 | HOWTO (R_var_eq_symb, /* type. */ |
| 639 | 0, /* rightshift. */ |
| 640 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 641 | 32, /* bitsize. */ |
| 642 | FALSE, /* pc_relative. */ |
| 643 | 0, /* bitpos. */ |
| 644 | complain_overflow_bitfield, /* complain_on_overflow. */ |
| 645 | bfin_bfd_reloc, /* special_function. */ |
| 646 | "R_var_eq_symb", /* name. */ |
| 647 | FALSE, /* partial_inplace. */ |
| 648 | 0, /* src_mask. */ |
| 649 | 0, /* dst_mask. */ |
| 650 | FALSE), /* pcrel_offset. */ |
| 651 | |
| 652 | HOWTO (R_byte_data, /* type. */ |
| 653 | 0, /* rightshift. */ |
| 654 | 0, /* size (0 = byte, 1 = short, 2 = long). */ |
| 655 | 8, /* bitsize. */ |
| 656 | FALSE, /* pc_relative. */ |
| 657 | 0, /* bitpos. */ |
| 658 | complain_overflow_unsigned, /* complain_on_overflow. */ |
| 659 | bfin_bfd_reloc, /* special_function. */ |
| 660 | "R_byte_data", /* name. */ |
| 661 | FALSE, /* partial_inplace. */ |
| 662 | 0, /* src_mask. */ |
| 663 | 0xFF, /* dst_mask. */ |
| 664 | TRUE), /* pcrel_offset. */ |
| 665 | |
| 666 | HOWTO (R_byte2_data, /* type. */ |
| 667 | 0, /* rightshift. */ |
| 668 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 669 | 16, /* bitsize. */ |
| 670 | FALSE, /* pc_relative. */ |
| 671 | 0, /* bitpos. */ |
| 672 | complain_overflow_signed, /* complain_on_overflow. */ |
| 673 | bfin_bfd_reloc, /* special_function. */ |
| 674 | "R_byte2_data", /* name. */ |
| 675 | FALSE, /* partial_inplace. */ |
| 676 | 0, /* src_mask. */ |
| 677 | 0xFFFF, /* dst_mask. */ |
| 678 | TRUE), /* pcrel_offset. */ |
| 679 | |
| 680 | HOWTO (R_byte4_data, /* type. */ |
| 681 | 0, /* rightshift. */ |
| 682 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 683 | 32, /* bitsize. */ |
| 684 | FALSE, /* pc_relative. */ |
| 685 | 0, /* bitpos. */ |
| 686 | complain_overflow_unsigned, /* complain_on_overflow. */ |
| 687 | bfin_byte4_reloc, /* special_function. */ |
| 688 | "R_byte4_data", /* name. */ |
| 689 | FALSE, /* partial_inplace. */ |
| 690 | 0, /* src_mask. */ |
| 691 | 0xFFFFFFFF, /* dst_mask. */ |
| 692 | TRUE), /* pcrel_offset. */ |
| 693 | |
| 694 | HOWTO (R_pcrel11, /* type. */ |
| 695 | 1, /* rightshift. */ |
| 696 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 697 | 10, /* bitsize. */ |
| 698 | TRUE, /* pc_relative. */ |
| 699 | 0, /* bitpos. */ |
| 700 | complain_overflow_unsigned, /* complain_on_overflow. */ |
| 701 | bfin_bfd_reloc, /* special_function. */ |
| 702 | "R_pcrel11", /* name. */ |
| 703 | FALSE, /* partial_inplace. */ |
| 704 | 0, /* src_mask. */ |
| 705 | 0x000003FF, /* dst_mask. */ |
| 706 | FALSE), /* pcrel_offset. */ |
| 707 | |
| 708 | |
| 709 | /* A 18-bit signed operand with the GOT offset for the address of |
| 710 | the symbol. */ |
| 711 | HOWTO (R_BFIN_GOT17M4, /* type */ |
| 712 | 2, /* rightshift */ |
| 713 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 714 | 16, /* bitsize */ |
| 715 | FALSE, /* pc_relative */ |
| 716 | 0, /* bitpos */ |
| 717 | complain_overflow_signed, /* complain_on_overflow */ |
| 718 | bfd_elf_generic_reloc, /* special_function */ |
| 719 | "R_BFIN_GOT12", /* name */ |
| 720 | FALSE, /* partial_inplace */ |
| 721 | 0xffff, /* src_mask */ |
| 722 | 0xffff, /* dst_mask */ |
| 723 | FALSE), /* pcrel_offset */ |
| 724 | |
| 725 | /* The upper 16 bits of the GOT offset for the address of the |
| 726 | symbol. */ |
| 727 | HOWTO (R_BFIN_GOTHI, /* type */ |
| 728 | 0, /* rightshift */ |
| 729 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 730 | 16, /* bitsize */ |
| 731 | FALSE, /* pc_relative */ |
| 732 | 0, /* bitpos */ |
| 733 | complain_overflow_dont, /* complain_on_overflow */ |
| 734 | bfd_elf_generic_reloc, /* special_function */ |
| 735 | "R_BFIN_GOTHI", /* name */ |
| 736 | FALSE, /* partial_inplace */ |
| 737 | 0xffff, /* src_mask */ |
| 738 | 0xffff, /* dst_mask */ |
| 739 | FALSE), /* pcrel_offset */ |
| 740 | |
| 741 | /* The lower 16 bits of the GOT offset for the address of the |
| 742 | symbol. */ |
| 743 | HOWTO (R_BFIN_GOTLO, /* type */ |
| 744 | 0, /* rightshift */ |
| 745 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 746 | 16, /* bitsize */ |
| 747 | FALSE, /* pc_relative */ |
| 748 | 0, /* bitpos */ |
| 749 | complain_overflow_dont, /* complain_on_overflow */ |
| 750 | bfd_elf_generic_reloc, /* special_function */ |
| 751 | "R_BFIN_GOTLO", /* name */ |
| 752 | FALSE, /* partial_inplace */ |
| 753 | 0xffff, /* src_mask */ |
| 754 | 0xffff, /* dst_mask */ |
| 755 | FALSE), /* pcrel_offset */ |
| 756 | |
| 757 | /* The 32-bit address of the canonical descriptor of a function. */ |
| 758 | HOWTO (R_BFIN_FUNCDESC, /* type */ |
| 759 | 0, /* rightshift */ |
| 760 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 761 | 32, /* bitsize */ |
| 762 | FALSE, /* pc_relative */ |
| 763 | 0, /* bitpos */ |
| 764 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 765 | bfd_elf_generic_reloc, /* special_function */ |
| 766 | "R_BFIN_FUNCDESC", /* name */ |
| 767 | FALSE, /* partial_inplace */ |
| 768 | 0xffffffff, /* src_mask */ |
| 769 | 0xffffffff, /* dst_mask */ |
| 770 | FALSE), /* pcrel_offset */ |
| 771 | |
| 772 | /* A 12-bit signed operand with the GOT offset for the address of |
| 773 | canonical descriptor of a function. */ |
| 774 | HOWTO (R_BFIN_FUNCDESC_GOT17M4, /* type */ |
| 775 | 2, /* rightshift */ |
| 776 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 777 | 16, /* bitsize */ |
| 778 | FALSE, /* pc_relative */ |
| 779 | 0, /* bitpos */ |
| 780 | complain_overflow_signed, /* complain_on_overflow */ |
| 781 | bfd_elf_generic_reloc, /* special_function */ |
| 782 | "R_BFIN_FUNCDESC_GOT17M4", /* name */ |
| 783 | FALSE, /* partial_inplace */ |
| 784 | 0xffff, /* src_mask */ |
| 785 | 0xffff, /* dst_mask */ |
| 786 | FALSE), /* pcrel_offset */ |
| 787 | |
| 788 | /* The upper 16 bits of the GOT offset for the address of the |
| 789 | canonical descriptor of a function. */ |
| 790 | HOWTO (R_BFIN_FUNCDESC_GOTHI, /* type */ |
| 791 | 0, /* rightshift */ |
| 792 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 793 | 16, /* bitsize */ |
| 794 | FALSE, /* pc_relative */ |
| 795 | 0, /* bitpos */ |
| 796 | complain_overflow_dont, /* complain_on_overflow */ |
| 797 | bfd_elf_generic_reloc, /* special_function */ |
| 798 | "R_BFIN_FUNCDESC_GOTHI", /* name */ |
| 799 | FALSE, /* partial_inplace */ |
| 800 | 0xffff, /* src_mask */ |
| 801 | 0xffff, /* dst_mask */ |
| 802 | FALSE), /* pcrel_offset */ |
| 803 | |
| 804 | /* The lower 16 bits of the GOT offset for the address of the |
| 805 | canonical descriptor of a function. */ |
| 806 | HOWTO (R_BFIN_FUNCDESC_GOTLO, /* type */ |
| 807 | 0, /* rightshift */ |
| 808 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 809 | 16, /* bitsize */ |
| 810 | FALSE, /* pc_relative */ |
| 811 | 0, /* bitpos */ |
| 812 | complain_overflow_dont, /* complain_on_overflow */ |
| 813 | bfd_elf_generic_reloc, /* special_function */ |
| 814 | "R_BFIN_FUNCDESC_GOTLO", /* name */ |
| 815 | FALSE, /* partial_inplace */ |
| 816 | 0xffff, /* src_mask */ |
| 817 | 0xffff, /* dst_mask */ |
| 818 | FALSE), /* pcrel_offset */ |
| 819 | |
| 820 | /* The 32-bit address of the canonical descriptor of a function. */ |
| 821 | HOWTO (R_BFIN_FUNCDESC_VALUE, /* type */ |
| 822 | 0, /* rightshift */ |
| 823 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 824 | 64, /* bitsize */ |
| 825 | FALSE, /* pc_relative */ |
| 826 | 0, /* bitpos */ |
| 827 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 828 | bfd_elf_generic_reloc, /* special_function */ |
| 829 | "R_BFIN_FUNCDESC_VALUE", /* name */ |
| 830 | FALSE, /* partial_inplace */ |
| 831 | 0xffffffff, /* src_mask */ |
| 832 | 0xffffffff, /* dst_mask */ |
| 833 | FALSE), /* pcrel_offset */ |
| 834 | |
| 835 | /* A 12-bit signed operand with the GOT offset for the address of |
| 836 | canonical descriptor of a function. */ |
| 837 | HOWTO (R_BFIN_FUNCDESC_GOTOFF17M4, /* type */ |
| 838 | 2, /* rightshift */ |
| 839 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 840 | 16, /* bitsize */ |
| 841 | FALSE, /* pc_relative */ |
| 842 | 0, /* bitpos */ |
| 843 | complain_overflow_signed, /* complain_on_overflow */ |
| 844 | bfd_elf_generic_reloc, /* special_function */ |
| 845 | "R_BFIN_FUNCDESC_GOTOFF17M4", /* name */ |
| 846 | FALSE, /* partial_inplace */ |
| 847 | 0xffff, /* src_mask */ |
| 848 | 0xffff, /* dst_mask */ |
| 849 | FALSE), /* pcrel_offset */ |
| 850 | |
| 851 | /* The upper 16 bits of the GOT offset for the address of the |
| 852 | canonical descriptor of a function. */ |
| 853 | HOWTO (R_BFIN_FUNCDESC_GOTOFFHI, /* type */ |
| 854 | 0, /* rightshift */ |
| 855 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 856 | 16, /* bitsize */ |
| 857 | FALSE, /* pc_relative */ |
| 858 | 0, /* bitpos */ |
| 859 | complain_overflow_dont, /* complain_on_overflow */ |
| 860 | bfd_elf_generic_reloc, /* special_function */ |
| 861 | "R_BFIN_FUNCDESC_GOTOFFHI", /* name */ |
| 862 | FALSE, /* partial_inplace */ |
| 863 | 0xffff, /* src_mask */ |
| 864 | 0xffff, /* dst_mask */ |
| 865 | FALSE), /* pcrel_offset */ |
| 866 | |
| 867 | /* The lower 16 bits of the GOT offset for the address of the |
| 868 | canonical descriptor of a function. */ |
| 869 | HOWTO (R_BFIN_FUNCDESC_GOTOFFLO, /* type */ |
| 870 | 0, /* rightshift */ |
| 871 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 872 | 16, /* bitsize */ |
| 873 | FALSE, /* pc_relative */ |
| 874 | 0, /* bitpos */ |
| 875 | complain_overflow_dont, /* complain_on_overflow */ |
| 876 | bfd_elf_generic_reloc, /* special_function */ |
| 877 | "R_BFIN_FUNCDESC_GOTOFFLO", /* name */ |
| 878 | FALSE, /* partial_inplace */ |
| 879 | 0xffff, /* src_mask */ |
| 880 | 0xffff, /* dst_mask */ |
| 881 | FALSE), /* pcrel_offset */ |
| 882 | |
| 883 | /* A 12-bit signed operand with the GOT offset for the address of |
| 884 | the symbol. */ |
| 885 | HOWTO (R_BFIN_GOTOFF17M4, /* type */ |
| 886 | 2, /* rightshift */ |
| 887 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 888 | 16, /* bitsize */ |
| 889 | FALSE, /* pc_relative */ |
| 890 | 0, /* bitpos */ |
| 891 | complain_overflow_signed, /* complain_on_overflow */ |
| 892 | bfd_elf_generic_reloc, /* special_function */ |
| 893 | "R_BFIN_GOTOFF17M4", /* name */ |
| 894 | FALSE, /* partial_inplace */ |
| 895 | 0xffff, /* src_mask */ |
| 896 | 0xffff, /* dst_mask */ |
| 897 | FALSE), /* pcrel_offset */ |
| 898 | |
| 899 | /* The upper 16 bits of the GOT offset for the address of the |
| 900 | symbol. */ |
| 901 | HOWTO (R_BFIN_GOTOFFHI, /* type */ |
| 902 | 0, /* rightshift */ |
| 903 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 904 | 16, /* bitsize */ |
| 905 | FALSE, /* pc_relative */ |
| 906 | 0, /* bitpos */ |
| 907 | complain_overflow_dont, /* complain_on_overflow */ |
| 908 | bfd_elf_generic_reloc, /* special_function */ |
| 909 | "R_BFIN_GOTOFFHI", /* name */ |
| 910 | FALSE, /* partial_inplace */ |
| 911 | 0xffff, /* src_mask */ |
| 912 | 0xffff, /* dst_mask */ |
| 913 | FALSE), /* pcrel_offset */ |
| 914 | |
| 915 | /* The lower 16 bits of the GOT offset for the address of the |
| 916 | symbol. */ |
| 917 | HOWTO (R_BFIN_GOTOFFLO, /* type */ |
| 918 | 0, /* rightshift */ |
| 919 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 920 | 16, /* bitsize */ |
| 921 | FALSE, /* pc_relative */ |
| 922 | 0, /* bitpos */ |
| 923 | complain_overflow_dont, /* complain_on_overflow */ |
| 924 | bfd_elf_generic_reloc, /* special_function */ |
| 925 | "R_BFIN_GOTOFFLO", /* name */ |
| 926 | FALSE, /* partial_inplace */ |
| 927 | 0xffff, /* src_mask */ |
| 928 | 0xffff, /* dst_mask */ |
| 929 | FALSE), /* pcrel_offset */ |
| 930 | }; |
| 931 | |
| 932 | static reloc_howto_type bfin_gnuext_howto_table [] = |
| 933 | { |
| 934 | HOWTO (R_pltpc, /* type. */ |
| 935 | 0, /* rightshift. */ |
| 936 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 937 | 16, /* bitsize. */ |
| 938 | FALSE, /* pc_relative. */ |
| 939 | 0, /* bitpos. */ |
| 940 | complain_overflow_bitfield, /* complain_on_overflow. */ |
| 941 | bfin_pltpc_reloc, /* special_function. */ |
| 942 | "R_pltpc", /* name. */ |
| 943 | FALSE, /* partial_inplace. */ |
| 944 | 0xffff, /* src_mask. */ |
| 945 | 0xffff, /* dst_mask. */ |
| 946 | FALSE), /* pcrel_offset. */ |
| 947 | |
| 948 | HOWTO (R_got, /* type. */ |
| 949 | 0, /* rightshift. */ |
| 950 | 1, /* size (0 = byte, 1 = short, 2 = long). */ |
| 951 | 16, /* bitsize. */ |
| 952 | FALSE, /* pc_relative. */ |
| 953 | 0, /* bitpos. */ |
| 954 | complain_overflow_bitfield, /* complain_on_overflow. */ |
| 955 | bfd_elf_generic_reloc, /* special_function. */ |
| 956 | "R_got", /* name. */ |
| 957 | FALSE, /* partial_inplace. */ |
| 958 | 0x7fff, /* src_mask. */ |
| 959 | 0x7fff, /* dst_mask. */ |
| 960 | FALSE), /* pcrel_offset. */ |
| 961 | |
| 962 | /* GNU extension to record C++ vtable hierarchy. */ |
| 963 | HOWTO (R_BFIN_GNU_VTINHERIT, /* type. */ |
| 964 | 0, /* rightshift. */ |
| 965 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 966 | 0, /* bitsize. */ |
| 967 | FALSE, /* pc_relative. */ |
| 968 | 0, /* bitpos. */ |
| 969 | complain_overflow_dont, /* complain_on_overflow. */ |
| 970 | NULL, /* special_function. */ |
| 971 | "R_BFIN_GNU_VTINHERIT", /* name. */ |
| 972 | FALSE, /* partial_inplace. */ |
| 973 | 0, /* src_mask. */ |
| 974 | 0, /* dst_mask. */ |
| 975 | FALSE), /* pcrel_offset. */ |
| 976 | |
| 977 | /* GNU extension to record C++ vtable member usage. */ |
| 978 | HOWTO (R_BFIN_GNU_VTENTRY, /* type. */ |
| 979 | 0, /* rightshift. */ |
| 980 | 2, /* size (0 = byte, 1 = short, 2 = long). */ |
| 981 | 0, /* bitsize. */ |
| 982 | FALSE, /* pc_relative. */ |
| 983 | 0, /* bitpos. */ |
| 984 | complain_overflow_dont, /* complain_on_overflow. */ |
| 985 | _bfd_elf_rel_vtable_reloc_fn, /* special_function. */ |
| 986 | "R_BFIN_GNU_VTENTRY", /* name. */ |
| 987 | FALSE, /* partial_inplace. */ |
| 988 | 0, /* src_mask. */ |
| 989 | 0, /* dst_mask. */ |
| 990 | FALSE) /* pcrel_offset. */ |
| 991 | }; |
| 992 | |
| 993 | struct bfin_reloc_map |
| 994 | { |
| 995 | bfd_reloc_code_real_type bfd_reloc_val; |
| 996 | unsigned int bfin_reloc_val; |
| 997 | }; |
| 998 | |
| 999 | static const struct bfin_reloc_map bfin_reloc_map [] = |
| 1000 | { |
| 1001 | { BFD_RELOC_NONE, R_unused0 }, |
| 1002 | { BFD_RELOC_BFIN_5_PCREL, R_pcrel5m2 }, |
| 1003 | { BFD_RELOC_NONE, R_unused1 }, |
| 1004 | { BFD_RELOC_BFIN_10_PCREL, R_pcrel10 }, |
| 1005 | { BFD_RELOC_BFIN_12_PCREL_JUMP, R_pcrel12_jump }, |
| 1006 | { BFD_RELOC_BFIN_16_IMM, R_rimm16 }, |
| 1007 | { BFD_RELOC_BFIN_16_LOW, R_luimm16 }, |
| 1008 | { BFD_RELOC_BFIN_16_HIGH, R_huimm16 }, |
| 1009 | { BFD_RELOC_BFIN_12_PCREL_JUMP_S, R_pcrel12_jump_s }, |
| 1010 | { BFD_RELOC_24_PCREL, R_pcrel24 }, |
| 1011 | { BFD_RELOC_24_PCREL, R_pcrel24 }, |
| 1012 | { BFD_RELOC_BFIN_24_PCREL_JUMP_L, R_pcrel24_jump_l }, |
| 1013 | { BFD_RELOC_NONE, R_unusedb }, |
| 1014 | { BFD_RELOC_NONE, R_unusedc }, |
| 1015 | { BFD_RELOC_BFIN_24_PCREL_CALL_X, R_pcrel24_call_x }, |
| 1016 | { BFD_RELOC_8, R_byte_data }, |
| 1017 | { BFD_RELOC_16, R_byte2_data }, |
| 1018 | { BFD_RELOC_32, R_byte4_data }, |
| 1019 | { BFD_RELOC_BFIN_11_PCREL, R_pcrel11 }, |
| 1020 | { BFD_RELOC_BFIN_GOT, R_got }, |
| 1021 | { BFD_RELOC_BFIN_PLTPC, R_pltpc }, |
| 1022 | |
| 1023 | { BFD_RELOC_BFIN_GOT17M4, R_BFIN_GOT17M4 }, |
| 1024 | { BFD_RELOC_BFIN_GOTHI, R_BFIN_GOTHI }, |
| 1025 | { BFD_RELOC_BFIN_GOTLO, R_BFIN_GOTLO }, |
| 1026 | { BFD_RELOC_BFIN_FUNCDESC, R_BFIN_FUNCDESC }, |
| 1027 | { BFD_RELOC_BFIN_FUNCDESC_GOT17M4, R_BFIN_FUNCDESC_GOT17M4 }, |
| 1028 | { BFD_RELOC_BFIN_FUNCDESC_GOTHI, R_BFIN_FUNCDESC_GOTHI }, |
| 1029 | { BFD_RELOC_BFIN_FUNCDESC_GOTLO, R_BFIN_FUNCDESC_GOTLO }, |
| 1030 | { BFD_RELOC_BFIN_FUNCDESC_VALUE, R_BFIN_FUNCDESC_VALUE }, |
| 1031 | { BFD_RELOC_BFIN_FUNCDESC_GOTOFF17M4, R_BFIN_FUNCDESC_GOTOFF17M4 }, |
| 1032 | { BFD_RELOC_BFIN_FUNCDESC_GOTOFFHI, R_BFIN_FUNCDESC_GOTOFFHI }, |
| 1033 | { BFD_RELOC_BFIN_FUNCDESC_GOTOFFLO, R_BFIN_FUNCDESC_GOTOFFLO }, |
| 1034 | { BFD_RELOC_BFIN_GOTOFF17M4, R_BFIN_GOTOFF17M4 }, |
| 1035 | { BFD_RELOC_BFIN_GOTOFFHI, R_BFIN_GOTOFFHI }, |
| 1036 | { BFD_RELOC_BFIN_GOTOFFLO, R_BFIN_GOTOFFLO }, |
| 1037 | |
| 1038 | { BFD_RELOC_VTABLE_INHERIT, R_BFIN_GNU_VTINHERIT }, |
| 1039 | { BFD_RELOC_VTABLE_ENTRY, R_BFIN_GNU_VTENTRY }, |
| 1040 | }; |
| 1041 | |
| 1042 | |
| 1043 | static void |
| 1044 | bfin_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, |
| 1045 | arelent *cache_ptr, |
| 1046 | Elf_Internal_Rela *dst) |
| 1047 | { |
| 1048 | unsigned int r_type; |
| 1049 | |
| 1050 | r_type = ELF32_R_TYPE (dst->r_info); |
| 1051 | |
| 1052 | if (r_type <= BFIN_RELOC_MAX) |
| 1053 | cache_ptr->howto = &bfin_howto_table [r_type]; |
| 1054 | |
| 1055 | else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX) |
| 1056 | cache_ptr->howto = &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN]; |
| 1057 | |
| 1058 | else |
| 1059 | cache_ptr->howto = (reloc_howto_type *) NULL; |
| 1060 | } |
| 1061 | |
| 1062 | /* Given a BFD reloc type, return the howto. */ |
| 1063 | static reloc_howto_type * |
| 1064 | bfin_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
| 1065 | bfd_reloc_code_real_type code) |
| 1066 | { |
| 1067 | unsigned int i; |
| 1068 | unsigned int r_type = BFIN_RELOC_MIN; |
| 1069 | |
| 1070 | for (i = sizeof (bfin_reloc_map) / sizeof (bfin_reloc_map[0]); --i;) |
| 1071 | if (bfin_reloc_map[i].bfd_reloc_val == code) |
| 1072 | r_type = bfin_reloc_map[i].bfin_reloc_val; |
| 1073 | |
| 1074 | if (r_type <= BFIN_RELOC_MAX && r_type > BFIN_RELOC_MIN) |
| 1075 | return &bfin_howto_table [r_type]; |
| 1076 | |
| 1077 | else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX) |
| 1078 | return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN]; |
| 1079 | |
| 1080 | return (reloc_howto_type *) NULL; |
| 1081 | } |
| 1082 | |
| 1083 | static reloc_howto_type * |
| 1084 | bfin_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1085 | const char *r_name) |
| 1086 | { |
| 1087 | unsigned int i; |
| 1088 | |
| 1089 | for (i = 0; |
| 1090 | i < (sizeof (bfin_howto_table) |
| 1091 | / sizeof (bfin_howto_table[0])); |
| 1092 | i++) |
| 1093 | if (bfin_howto_table[i].name != NULL |
| 1094 | && strcasecmp (bfin_howto_table[i].name, r_name) == 0) |
| 1095 | return &bfin_howto_table[i]; |
| 1096 | |
| 1097 | for (i = 0; |
| 1098 | i < (sizeof (bfin_gnuext_howto_table) |
| 1099 | / sizeof (bfin_gnuext_howto_table[0])); |
| 1100 | i++) |
| 1101 | if (bfin_gnuext_howto_table[i].name != NULL |
| 1102 | && strcasecmp (bfin_gnuext_howto_table[i].name, r_name) == 0) |
| 1103 | return &bfin_gnuext_howto_table[i]; |
| 1104 | |
| 1105 | return NULL; |
| 1106 | } |
| 1107 | |
| 1108 | /* Given a bfin relocation type, return the howto. */ |
| 1109 | static reloc_howto_type * |
| 1110 | bfin_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
| 1111 | unsigned int r_type) |
| 1112 | { |
| 1113 | if (r_type <= BFIN_RELOC_MAX) |
| 1114 | return &bfin_howto_table [r_type]; |
| 1115 | |
| 1116 | else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX) |
| 1117 | return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN]; |
| 1118 | |
| 1119 | return (reloc_howto_type *) NULL; |
| 1120 | } |
| 1121 | |
| 1122 | /* Return TRUE if the name is a local label. |
| 1123 | bfin local labels begin with L$. */ |
| 1124 | static bfd_boolean |
| 1125 | bfin_is_local_label_name ( |
| 1126 | bfd *abfd ATTRIBUTE_UNUSED, |
| 1127 | const char *label) |
| 1128 | { |
| 1129 | if (label[0] == 'L' && label[1] == '$' ) |
| 1130 | return TRUE; |
| 1131 | |
| 1132 | return _bfd_elf_is_local_label_name (abfd, label); |
| 1133 | } |
| 1134 | |
| 1135 | extern const bfd_target bfd_elf32_bfinfdpic_vec; |
| 1136 | #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_bfinfdpic_vec) |
| 1137 | |
| 1138 | /* An extension of the elf hash table data structure, containing some |
| 1139 | additional Blackfin-specific data. */ |
| 1140 | struct bfinfdpic_elf_link_hash_table |
| 1141 | { |
| 1142 | struct elf_link_hash_table elf; |
| 1143 | |
| 1144 | /* A pointer to the .got section. */ |
| 1145 | asection *sgot; |
| 1146 | /* A pointer to the .rel.got section. */ |
| 1147 | asection *sgotrel; |
| 1148 | /* A pointer to the .rofixup section. */ |
| 1149 | asection *sgotfixup; |
| 1150 | /* A pointer to the .plt section. */ |
| 1151 | asection *splt; |
| 1152 | /* A pointer to the .rel.plt section. */ |
| 1153 | asection *spltrel; |
| 1154 | /* GOT base offset. */ |
| 1155 | bfd_vma got0; |
| 1156 | /* Location of the first non-lazy PLT entry, i.e., the number of |
| 1157 | bytes taken by lazy PLT entries. */ |
| 1158 | bfd_vma plt0; |
| 1159 | /* A hash table holding information about which symbols were |
| 1160 | referenced with which PIC-related relocations. */ |
| 1161 | struct htab *relocs_info; |
| 1162 | }; |
| 1163 | |
| 1164 | /* Get the Blackfin ELF linker hash table from a link_info structure. */ |
| 1165 | |
| 1166 | #define bfinfdpic_hash_table(info) \ |
| 1167 | ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash)) |
| 1168 | |
| 1169 | #define bfinfdpic_got_section(info) \ |
| 1170 | (bfinfdpic_hash_table (info)->sgot) |
| 1171 | #define bfinfdpic_gotrel_section(info) \ |
| 1172 | (bfinfdpic_hash_table (info)->sgotrel) |
| 1173 | #define bfinfdpic_gotfixup_section(info) \ |
| 1174 | (bfinfdpic_hash_table (info)->sgotfixup) |
| 1175 | #define bfinfdpic_plt_section(info) \ |
| 1176 | (bfinfdpic_hash_table (info)->splt) |
| 1177 | #define bfinfdpic_pltrel_section(info) \ |
| 1178 | (bfinfdpic_hash_table (info)->spltrel) |
| 1179 | #define bfinfdpic_relocs_info(info) \ |
| 1180 | (bfinfdpic_hash_table (info)->relocs_info) |
| 1181 | #define bfinfdpic_got_initial_offset(info) \ |
| 1182 | (bfinfdpic_hash_table (info)->got0) |
| 1183 | #define bfinfdpic_plt_initial_offset(info) \ |
| 1184 | (bfinfdpic_hash_table (info)->plt0) |
| 1185 | |
| 1186 | /* Create a Blackfin ELF linker hash table. */ |
| 1187 | |
| 1188 | static struct bfd_link_hash_table * |
| 1189 | bfinfdpic_elf_link_hash_table_create (bfd *abfd) |
| 1190 | { |
| 1191 | struct bfinfdpic_elf_link_hash_table *ret; |
| 1192 | bfd_size_type amt = sizeof (struct bfinfdpic_elf_link_hash_table); |
| 1193 | |
| 1194 | ret = bfd_zalloc (abfd, amt); |
| 1195 | if (ret == NULL) |
| 1196 | return NULL; |
| 1197 | |
| 1198 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
| 1199 | _bfd_elf_link_hash_newfunc, |
| 1200 | sizeof (struct elf_link_hash_entry))) |
| 1201 | { |
| 1202 | free (ret); |
| 1203 | return NULL; |
| 1204 | } |
| 1205 | |
| 1206 | return &ret->elf.root; |
| 1207 | } |
| 1208 | |
| 1209 | /* Decide whether a reference to a symbol can be resolved locally or |
| 1210 | not. If the symbol is protected, we want the local address, but |
| 1211 | its function descriptor must be assigned by the dynamic linker. */ |
| 1212 | #define BFINFDPIC_SYM_LOCAL(INFO, H) \ |
| 1213 | (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \ |
| 1214 | || ! elf_hash_table (INFO)->dynamic_sections_created) |
| 1215 | #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \ |
| 1216 | ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created) |
| 1217 | |
| 1218 | /* This structure collects information on what kind of GOT, PLT or |
| 1219 | function descriptors are required by relocations that reference a |
| 1220 | certain symbol. */ |
| 1221 | struct bfinfdpic_relocs_info |
| 1222 | { |
| 1223 | /* The index of the symbol, as stored in the relocation r_info, if |
| 1224 | we have a local symbol; -1 otherwise. */ |
| 1225 | long symndx; |
| 1226 | union |
| 1227 | { |
| 1228 | /* The input bfd in which the symbol is defined, if it's a local |
| 1229 | symbol. */ |
| 1230 | bfd *abfd; |
| 1231 | /* If symndx == -1, the hash table entry corresponding to a global |
| 1232 | symbol (even if it turns out to bind locally, in which case it |
| 1233 | should ideally be replaced with section's symndx + addend). */ |
| 1234 | struct elf_link_hash_entry *h; |
| 1235 | } d; |
| 1236 | /* The addend of the relocation that references the symbol. */ |
| 1237 | bfd_vma addend; |
| 1238 | |
| 1239 | /* The fields above are used to identify an entry. The fields below |
| 1240 | contain information on how an entry is used and, later on, which |
| 1241 | locations it was assigned. */ |
| 1242 | /* The following 2 fields record whether the symbol+addend above was |
| 1243 | ever referenced with a GOT relocation. The 17M4 suffix indicates a |
| 1244 | GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */ |
| 1245 | unsigned got17m4:1; |
| 1246 | unsigned gothilo:1; |
| 1247 | /* Whether a FUNCDESC relocation references symbol+addend. */ |
| 1248 | unsigned fd:1; |
| 1249 | /* Whether a FUNCDESC_GOT relocation references symbol+addend. */ |
| 1250 | unsigned fdgot17m4:1; |
| 1251 | unsigned fdgothilo:1; |
| 1252 | /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */ |
| 1253 | unsigned fdgoff17m4:1; |
| 1254 | unsigned fdgoffhilo:1; |
| 1255 | /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or |
| 1256 | GOTOFFHI relocations. The addend doesn't really matter, since we |
| 1257 | envision that this will only be used to check whether the symbol |
| 1258 | is mapped to the same segment as the got. */ |
| 1259 | unsigned gotoff:1; |
| 1260 | /* Whether symbol+addend is referenced by a LABEL24 relocation. */ |
| 1261 | unsigned call:1; |
| 1262 | /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE |
| 1263 | relocation. */ |
| 1264 | unsigned sym:1; |
| 1265 | /* Whether we need a PLT entry for a symbol. Should be implied by |
| 1266 | something like: |
| 1267 | (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */ |
| 1268 | unsigned plt:1; |
| 1269 | /* Whether a function descriptor should be created in this link unit |
| 1270 | for symbol+addend. Should be implied by something like: |
| 1271 | (plt || fdgotoff17m4 || fdgotofflohi |
| 1272 | || ((fd || fdgot17m4 || fdgothilo) |
| 1273 | && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */ |
| 1274 | unsigned privfd:1; |
| 1275 | /* Whether a lazy PLT entry is needed for this symbol+addend. |
| 1276 | Should be implied by something like: |
| 1277 | (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h) |
| 1278 | && ! (info->flags & DF_BIND_NOW)) */ |
| 1279 | unsigned lazyplt:1; |
| 1280 | /* Whether we've already emitted GOT relocations and PLT entries as |
| 1281 | needed for this symbol. */ |
| 1282 | unsigned done:1; |
| 1283 | |
| 1284 | /* The number of R_byte4_data, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE |
| 1285 | relocations referencing the symbol. */ |
| 1286 | unsigned relocs32, relocsfd, relocsfdv; |
| 1287 | |
| 1288 | /* The number of .rofixups entries and dynamic relocations allocated |
| 1289 | for this symbol, minus any that might have already been used. */ |
| 1290 | unsigned fixups, dynrelocs; |
| 1291 | |
| 1292 | /* The offsets of the GOT entries assigned to symbol+addend, to the |
| 1293 | function descriptor's address, and to a function descriptor, |
| 1294 | respectively. Should be zero if unassigned. The offsets are |
| 1295 | counted from the value that will be assigned to the PIC register, |
| 1296 | not from the beginning of the .got section. */ |
| 1297 | bfd_signed_vma got_entry, fdgot_entry, fd_entry; |
| 1298 | /* The offsets of the PLT entries assigned to symbol+addend, |
| 1299 | non-lazy and lazy, respectively. If unassigned, should be |
| 1300 | (bfd_vma)-1. */ |
| 1301 | bfd_vma plt_entry, lzplt_entry; |
| 1302 | }; |
| 1303 | |
| 1304 | /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */ |
| 1305 | static hashval_t |
| 1306 | bfinfdpic_relocs_info_hash (const void *entry_) |
| 1307 | { |
| 1308 | const struct bfinfdpic_relocs_info *entry = entry_; |
| 1309 | |
| 1310 | return (entry->symndx == -1 |
| 1311 | ? (long) entry->d.h->root.root.hash |
| 1312 | : entry->symndx + (long) entry->d.abfd->id * 257) + entry->addend; |
| 1313 | } |
| 1314 | |
| 1315 | /* Test whether the key fields of two bfinfdpic_relocs_info entries are |
| 1316 | identical. */ |
| 1317 | static int |
| 1318 | bfinfdpic_relocs_info_eq (const void *entry1, const void *entry2) |
| 1319 | { |
| 1320 | const struct bfinfdpic_relocs_info *e1 = entry1; |
| 1321 | const struct bfinfdpic_relocs_info *e2 = entry2; |
| 1322 | |
| 1323 | return e1->symndx == e2->symndx && e1->addend == e2->addend |
| 1324 | && (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd); |
| 1325 | } |
| 1326 | |
| 1327 | /* Find or create an entry in a hash table HT that matches the key |
| 1328 | fields of the given ENTRY. If it's not found, memory for a new |
| 1329 | entry is allocated in ABFD's obstack. */ |
| 1330 | static struct bfinfdpic_relocs_info * |
| 1331 | bfinfdpic_relocs_info_find (struct htab *ht, |
| 1332 | bfd *abfd, |
| 1333 | const struct bfinfdpic_relocs_info *entry, |
| 1334 | enum insert_option insert) |
| 1335 | { |
| 1336 | struct bfinfdpic_relocs_info **loc = |
| 1337 | (struct bfinfdpic_relocs_info **) htab_find_slot (ht, entry, insert); |
| 1338 | |
| 1339 | if (! loc) |
| 1340 | return NULL; |
| 1341 | |
| 1342 | if (*loc) |
| 1343 | return *loc; |
| 1344 | |
| 1345 | *loc = bfd_zalloc (abfd, sizeof (**loc)); |
| 1346 | |
| 1347 | if (! *loc) |
| 1348 | return *loc; |
| 1349 | |
| 1350 | (*loc)->symndx = entry->symndx; |
| 1351 | (*loc)->d = entry->d; |
| 1352 | (*loc)->addend = entry->addend; |
| 1353 | (*loc)->plt_entry = (bfd_vma)-1; |
| 1354 | (*loc)->lzplt_entry = (bfd_vma)-1; |
| 1355 | |
| 1356 | return *loc; |
| 1357 | } |
| 1358 | |
| 1359 | /* Obtain the address of the entry in HT associated with H's symbol + |
| 1360 | addend, creating a new entry if none existed. ABFD is only used |
| 1361 | for memory allocation purposes. */ |
| 1362 | inline static struct bfinfdpic_relocs_info * |
| 1363 | bfinfdpic_relocs_info_for_global (struct htab *ht, |
| 1364 | bfd *abfd, |
| 1365 | struct elf_link_hash_entry *h, |
| 1366 | bfd_vma addend, |
| 1367 | enum insert_option insert) |
| 1368 | { |
| 1369 | struct bfinfdpic_relocs_info entry; |
| 1370 | |
| 1371 | entry.symndx = -1; |
| 1372 | entry.d.h = h; |
| 1373 | entry.addend = addend; |
| 1374 | |
| 1375 | return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert); |
| 1376 | } |
| 1377 | |
| 1378 | /* Obtain the address of the entry in HT associated with the SYMNDXth |
| 1379 | local symbol of the input bfd ABFD, plus the addend, creating a new |
| 1380 | entry if none existed. */ |
| 1381 | inline static struct bfinfdpic_relocs_info * |
| 1382 | bfinfdpic_relocs_info_for_local (struct htab *ht, |
| 1383 | bfd *abfd, |
| 1384 | long symndx, |
| 1385 | bfd_vma addend, |
| 1386 | enum insert_option insert) |
| 1387 | { |
| 1388 | struct bfinfdpic_relocs_info entry; |
| 1389 | |
| 1390 | entry.symndx = symndx; |
| 1391 | entry.d.abfd = abfd; |
| 1392 | entry.addend = addend; |
| 1393 | |
| 1394 | return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert); |
| 1395 | } |
| 1396 | |
| 1397 | /* Merge fields set by check_relocs() of two entries that end up being |
| 1398 | mapped to the same (presumably global) symbol. */ |
| 1399 | |
| 1400 | inline static void |
| 1401 | bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info *e2, |
| 1402 | struct bfinfdpic_relocs_info const *e1) |
| 1403 | { |
| 1404 | e2->got17m4 |= e1->got17m4; |
| 1405 | e2->gothilo |= e1->gothilo; |
| 1406 | e2->fd |= e1->fd; |
| 1407 | e2->fdgot17m4 |= e1->fdgot17m4; |
| 1408 | e2->fdgothilo |= e1->fdgothilo; |
| 1409 | e2->fdgoff17m4 |= e1->fdgoff17m4; |
| 1410 | e2->fdgoffhilo |= e1->fdgoffhilo; |
| 1411 | e2->gotoff |= e1->gotoff; |
| 1412 | e2->call |= e1->call; |
| 1413 | e2->sym |= e1->sym; |
| 1414 | } |
| 1415 | |
| 1416 | /* Every block of 65535 lazy PLT entries shares a single call to the |
| 1417 | resolver, inserted in the 32768th lazy PLT entry (i.e., entry # |
| 1418 | 32767, counting from 0). All other lazy PLT entries branch to it |
| 1419 | in a single instruction. */ |
| 1420 | |
| 1421 | #define LZPLT_RESOLVER_EXTRA 10 |
| 1422 | #define LZPLT_NORMAL_SIZE 6 |
| 1423 | #define LZPLT_ENTRIES 1362 |
| 1424 | |
| 1425 | #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA) |
| 1426 | #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2) |
| 1427 | |
| 1428 | /* Add a dynamic relocation to the SRELOC section. */ |
| 1429 | |
| 1430 | inline static bfd_vma |
| 1431 | _bfinfdpic_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset, |
| 1432 | int reloc_type, long dynindx, bfd_vma addend, |
| 1433 | struct bfinfdpic_relocs_info *entry) |
| 1434 | { |
| 1435 | Elf_Internal_Rela outrel; |
| 1436 | bfd_vma reloc_offset; |
| 1437 | |
| 1438 | outrel.r_offset = offset; |
| 1439 | outrel.r_info = ELF32_R_INFO (dynindx, reloc_type); |
| 1440 | outrel.r_addend = addend; |
| 1441 | |
| 1442 | reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel); |
| 1443 | BFD_ASSERT (reloc_offset < sreloc->size); |
| 1444 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, |
| 1445 | sreloc->contents + reloc_offset); |
| 1446 | sreloc->reloc_count++; |
| 1447 | |
| 1448 | /* If the entry's index is zero, this relocation was probably to a |
| 1449 | linkonce section that got discarded. We reserved a dynamic |
| 1450 | relocation, but it was for another entry than the one we got at |
| 1451 | the time of emitting the relocation. Unfortunately there's no |
| 1452 | simple way for us to catch this situation, since the relocation |
| 1453 | is cleared right before calling relocate_section, at which point |
| 1454 | we no longer know what the relocation used to point to. */ |
| 1455 | if (entry->symndx) |
| 1456 | { |
| 1457 | BFD_ASSERT (entry->dynrelocs > 0); |
| 1458 | entry->dynrelocs--; |
| 1459 | } |
| 1460 | |
| 1461 | return reloc_offset; |
| 1462 | } |
| 1463 | |
| 1464 | /* Add a fixup to the ROFIXUP section. */ |
| 1465 | |
| 1466 | static bfd_vma |
| 1467 | _bfinfdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset, |
| 1468 | struct bfinfdpic_relocs_info *entry) |
| 1469 | { |
| 1470 | bfd_vma fixup_offset; |
| 1471 | |
| 1472 | if (rofixup->flags & SEC_EXCLUDE) |
| 1473 | return -1; |
| 1474 | |
| 1475 | fixup_offset = rofixup->reloc_count * 4; |
| 1476 | if (rofixup->contents) |
| 1477 | { |
| 1478 | BFD_ASSERT (fixup_offset < rofixup->size); |
| 1479 | bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset); |
| 1480 | } |
| 1481 | rofixup->reloc_count++; |
| 1482 | |
| 1483 | if (entry && entry->symndx) |
| 1484 | { |
| 1485 | /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc |
| 1486 | above. */ |
| 1487 | BFD_ASSERT (entry->fixups > 0); |
| 1488 | entry->fixups--; |
| 1489 | } |
| 1490 | |
| 1491 | return fixup_offset; |
| 1492 | } |
| 1493 | |
| 1494 | /* Find the segment number in which OSEC, and output section, is |
| 1495 | located. */ |
| 1496 | |
| 1497 | static unsigned |
| 1498 | _bfinfdpic_osec_to_segment (bfd *output_bfd, asection *osec) |
| 1499 | { |
| 1500 | struct elf_segment_map *m; |
| 1501 | Elf_Internal_Phdr *p; |
| 1502 | |
| 1503 | /* Find the segment that contains the output_section. */ |
| 1504 | for (m = elf_tdata (output_bfd)->segment_map, |
| 1505 | p = elf_tdata (output_bfd)->phdr; |
| 1506 | m != NULL; |
| 1507 | m = m->next, p++) |
| 1508 | { |
| 1509 | int i; |
| 1510 | |
| 1511 | for (i = m->count - 1; i >= 0; i--) |
| 1512 | if (m->sections[i] == osec) |
| 1513 | break; |
| 1514 | |
| 1515 | if (i >= 0) |
| 1516 | break; |
| 1517 | } |
| 1518 | |
| 1519 | return p - elf_tdata (output_bfd)->phdr; |
| 1520 | } |
| 1521 | |
| 1522 | inline static bfd_boolean |
| 1523 | _bfinfdpic_osec_readonly_p (bfd *output_bfd, asection *osec) |
| 1524 | { |
| 1525 | unsigned seg = _bfinfdpic_osec_to_segment (output_bfd, osec); |
| 1526 | |
| 1527 | return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W); |
| 1528 | } |
| 1529 | |
| 1530 | /* Generate relocations for GOT entries, function descriptors, and |
| 1531 | code for PLT and lazy PLT entries. */ |
| 1532 | |
| 1533 | inline static bfd_boolean |
| 1534 | _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry, |
| 1535 | bfd *output_bfd, |
| 1536 | struct bfd_link_info *info, |
| 1537 | asection *sec, |
| 1538 | Elf_Internal_Sym *sym, |
| 1539 | bfd_vma addend) |
| 1540 | |
| 1541 | { |
| 1542 | bfd_vma fd_lazy_rel_offset = (bfd_vma)-1; |
| 1543 | int dynindx = -1; |
| 1544 | |
| 1545 | if (entry->done) |
| 1546 | return TRUE; |
| 1547 | entry->done = 1; |
| 1548 | |
| 1549 | if (entry->got_entry || entry->fdgot_entry || entry->fd_entry) |
| 1550 | { |
| 1551 | /* If the symbol is dynamic, consider it for dynamic |
| 1552 | relocations, otherwise decay to section + offset. */ |
| 1553 | if (entry->symndx == -1 && entry->d.h->dynindx != -1) |
| 1554 | dynindx = entry->d.h->dynindx; |
| 1555 | else |
| 1556 | { |
| 1557 | if (sec->output_section |
| 1558 | && ! bfd_is_abs_section (sec->output_section) |
| 1559 | && ! bfd_is_und_section (sec->output_section)) |
| 1560 | dynindx = elf_section_data (sec->output_section)->dynindx; |
| 1561 | else |
| 1562 | dynindx = 0; |
| 1563 | } |
| 1564 | } |
| 1565 | |
| 1566 | /* Generate relocation for GOT entry pointing to the symbol. */ |
| 1567 | if (entry->got_entry) |
| 1568 | { |
| 1569 | int idx = dynindx; |
| 1570 | bfd_vma ad = addend; |
| 1571 | |
| 1572 | /* If the symbol is dynamic but binds locally, use |
| 1573 | section+offset. */ |
| 1574 | if (sec && (entry->symndx != -1 |
| 1575 | || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) |
| 1576 | { |
| 1577 | if (entry->symndx == -1) |
| 1578 | ad += entry->d.h->root.u.def.value; |
| 1579 | else |
| 1580 | ad += sym->st_value; |
| 1581 | ad += sec->output_offset; |
| 1582 | if (sec->output_section && elf_section_data (sec->output_section)) |
| 1583 | idx = elf_section_data (sec->output_section)->dynindx; |
| 1584 | else |
| 1585 | idx = 0; |
| 1586 | } |
| 1587 | |
| 1588 | /* If we're linking an executable at a fixed address, we can |
| 1589 | omit the dynamic relocation as long as the symbol is local to |
| 1590 | this module. */ |
| 1591 | if (info->executable && !info->pie |
| 1592 | && (entry->symndx != -1 |
| 1593 | || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) |
| 1594 | { |
| 1595 | if (sec) |
| 1596 | ad += sec->output_section->vma; |
| 1597 | if (entry->symndx != -1 |
| 1598 | || entry->d.h->root.type != bfd_link_hash_undefweak) |
| 1599 | _bfinfdpic_add_rofixup (output_bfd, |
| 1600 | bfinfdpic_gotfixup_section (info), |
| 1601 | bfinfdpic_got_section (info)->output_section |
| 1602 | ->vma |
| 1603 | + bfinfdpic_got_section (info)->output_offset |
| 1604 | + bfinfdpic_got_initial_offset (info) |
| 1605 | + entry->got_entry, entry); |
| 1606 | } |
| 1607 | else |
| 1608 | _bfinfdpic_add_dyn_reloc (output_bfd, bfinfdpic_gotrel_section (info), |
| 1609 | _bfd_elf_section_offset |
| 1610 | (output_bfd, info, |
| 1611 | bfinfdpic_got_section (info), |
| 1612 | bfinfdpic_got_initial_offset (info) |
| 1613 | + entry->got_entry) |
| 1614 | + bfinfdpic_got_section (info) |
| 1615 | ->output_section->vma |
| 1616 | + bfinfdpic_got_section (info)->output_offset, |
| 1617 | R_byte4_data, idx, ad, entry); |
| 1618 | |
| 1619 | bfd_put_32 (output_bfd, ad, |
| 1620 | bfinfdpic_got_section (info)->contents |
| 1621 | + bfinfdpic_got_initial_offset (info) |
| 1622 | + entry->got_entry); |
| 1623 | } |
| 1624 | |
| 1625 | /* Generate relocation for GOT entry pointing to a canonical |
| 1626 | function descriptor. */ |
| 1627 | if (entry->fdgot_entry) |
| 1628 | { |
| 1629 | int reloc, idx; |
| 1630 | bfd_vma ad = 0; |
| 1631 | |
| 1632 | if (! (entry->symndx == -1 |
| 1633 | && entry->d.h->root.type == bfd_link_hash_undefweak |
| 1634 | && BFINFDPIC_SYM_LOCAL (info, entry->d.h))) |
| 1635 | { |
| 1636 | /* If the symbol is dynamic and there may be dynamic symbol |
| 1637 | resolution because we are, or are linked with, a shared |
| 1638 | library, emit a FUNCDESC relocation such that the dynamic |
| 1639 | linker will allocate the function descriptor. If the |
| 1640 | symbol needs a non-local function descriptor but binds |
| 1641 | locally (e.g., its visibility is protected, emit a |
| 1642 | dynamic relocation decayed to section+offset. */ |
| 1643 | if (entry->symndx == -1 |
| 1644 | && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h) |
| 1645 | && BFINFDPIC_SYM_LOCAL (info, entry->d.h) |
| 1646 | && !(info->executable && !info->pie)) |
| 1647 | { |
| 1648 | reloc = R_BFIN_FUNCDESC; |
| 1649 | idx = elf_section_data (entry->d.h->root.u.def.section |
| 1650 | ->output_section)->dynindx; |
| 1651 | ad = entry->d.h->root.u.def.section->output_offset |
| 1652 | + entry->d.h->root.u.def.value; |
| 1653 | } |
| 1654 | else if (entry->symndx == -1 |
| 1655 | && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)) |
| 1656 | { |
| 1657 | reloc = R_BFIN_FUNCDESC; |
| 1658 | idx = dynindx; |
| 1659 | ad = addend; |
| 1660 | if (ad) |
| 1661 | return FALSE; |
| 1662 | } |
| 1663 | else |
| 1664 | { |
| 1665 | /* Otherwise, we know we have a private function descriptor, |
| 1666 | so reference it directly. */ |
| 1667 | if (elf_hash_table (info)->dynamic_sections_created) |
| 1668 | BFD_ASSERT (entry->privfd); |
| 1669 | reloc = R_byte4_data; |
| 1670 | idx = elf_section_data (bfinfdpic_got_section (info) |
| 1671 | ->output_section)->dynindx; |
| 1672 | ad = bfinfdpic_got_section (info)->output_offset |
| 1673 | + bfinfdpic_got_initial_offset (info) + entry->fd_entry; |
| 1674 | } |
| 1675 | |
| 1676 | /* If there is room for dynamic symbol resolution, emit the |
| 1677 | dynamic relocation. However, if we're linking an |
| 1678 | executable at a fixed location, we won't have emitted a |
| 1679 | dynamic symbol entry for the got section, so idx will be |
| 1680 | zero, which means we can and should compute the address |
| 1681 | of the private descriptor ourselves. */ |
| 1682 | if (info->executable && !info->pie |
| 1683 | && (entry->symndx != -1 |
| 1684 | || BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h))) |
| 1685 | { |
| 1686 | ad += bfinfdpic_got_section (info)->output_section->vma; |
| 1687 | _bfinfdpic_add_rofixup (output_bfd, |
| 1688 | bfinfdpic_gotfixup_section (info), |
| 1689 | bfinfdpic_got_section (info) |
| 1690 | ->output_section->vma |
| 1691 | + bfinfdpic_got_section (info) |
| 1692 | ->output_offset |
| 1693 | + bfinfdpic_got_initial_offset (info) |
| 1694 | + entry->fdgot_entry, entry); |
| 1695 | } |
| 1696 | else |
| 1697 | _bfinfdpic_add_dyn_reloc (output_bfd, |
| 1698 | bfinfdpic_gotrel_section (info), |
| 1699 | _bfd_elf_section_offset |
| 1700 | (output_bfd, info, |
| 1701 | bfinfdpic_got_section (info), |
| 1702 | bfinfdpic_got_initial_offset (info) |
| 1703 | + entry->fdgot_entry) |
| 1704 | + bfinfdpic_got_section (info) |
| 1705 | ->output_section->vma |
| 1706 | + bfinfdpic_got_section (info) |
| 1707 | ->output_offset, |
| 1708 | reloc, idx, ad, entry); |
| 1709 | } |
| 1710 | |
| 1711 | bfd_put_32 (output_bfd, ad, |
| 1712 | bfinfdpic_got_section (info)->contents |
| 1713 | + bfinfdpic_got_initial_offset (info) |
| 1714 | + entry->fdgot_entry); |
| 1715 | } |
| 1716 | |
| 1717 | /* Generate relocation to fill in a private function descriptor in |
| 1718 | the GOT. */ |
| 1719 | if (entry->fd_entry) |
| 1720 | { |
| 1721 | int idx = dynindx; |
| 1722 | bfd_vma ad = addend; |
| 1723 | bfd_vma ofst; |
| 1724 | long lowword, highword; |
| 1725 | |
| 1726 | /* If the symbol is dynamic but binds locally, use |
| 1727 | section+offset. */ |
| 1728 | if (sec && (entry->symndx != -1 |
| 1729 | || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) |
| 1730 | { |
| 1731 | if (entry->symndx == -1) |
| 1732 | ad += entry->d.h->root.u.def.value; |
| 1733 | else |
| 1734 | ad += sym->st_value; |
| 1735 | ad += sec->output_offset; |
| 1736 | if (sec->output_section && elf_section_data (sec->output_section)) |
| 1737 | idx = elf_section_data (sec->output_section)->dynindx; |
| 1738 | else |
| 1739 | idx = 0; |
| 1740 | } |
| 1741 | |
| 1742 | /* If we're linking an executable at a fixed address, we can |
| 1743 | omit the dynamic relocation as long as the symbol is local to |
| 1744 | this module. */ |
| 1745 | if (info->executable && !info->pie |
| 1746 | && (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) |
| 1747 | { |
| 1748 | if (sec) |
| 1749 | ad += sec->output_section->vma; |
| 1750 | ofst = 0; |
| 1751 | if (entry->symndx != -1 |
| 1752 | || entry->d.h->root.type != bfd_link_hash_undefweak) |
| 1753 | { |
| 1754 | _bfinfdpic_add_rofixup (output_bfd, |
| 1755 | bfinfdpic_gotfixup_section (info), |
| 1756 | bfinfdpic_got_section (info) |
| 1757 | ->output_section->vma |
| 1758 | + bfinfdpic_got_section (info) |
| 1759 | ->output_offset |
| 1760 | + bfinfdpic_got_initial_offset (info) |
| 1761 | + entry->fd_entry, entry); |
| 1762 | _bfinfdpic_add_rofixup (output_bfd, |
| 1763 | bfinfdpic_gotfixup_section (info), |
| 1764 | bfinfdpic_got_section (info) |
| 1765 | ->output_section->vma |
| 1766 | + bfinfdpic_got_section (info) |
| 1767 | ->output_offset |
| 1768 | + bfinfdpic_got_initial_offset (info) |
| 1769 | + entry->fd_entry + 4, entry); |
| 1770 | } |
| 1771 | } |
| 1772 | else |
| 1773 | { |
| 1774 | ofst |
| 1775 | = _bfinfdpic_add_dyn_reloc (output_bfd, |
| 1776 | entry->lazyplt |
| 1777 | ? bfinfdpic_pltrel_section (info) |
| 1778 | : bfinfdpic_gotrel_section (info), |
| 1779 | _bfd_elf_section_offset |
| 1780 | (output_bfd, info, |
| 1781 | bfinfdpic_got_section (info), |
| 1782 | bfinfdpic_got_initial_offset (info) |
| 1783 | + entry->fd_entry) |
| 1784 | + bfinfdpic_got_section (info) |
| 1785 | ->output_section->vma |
| 1786 | + bfinfdpic_got_section (info) |
| 1787 | ->output_offset, |
| 1788 | R_BFIN_FUNCDESC_VALUE, idx, ad, entry); |
| 1789 | } |
| 1790 | |
| 1791 | /* If we've omitted the dynamic relocation, just emit the fixed |
| 1792 | addresses of the symbol and of the local GOT base offset. */ |
| 1793 | if (info->executable && !info->pie && sec && sec->output_section) |
| 1794 | { |
| 1795 | lowword = ad; |
| 1796 | highword = bfinfdpic_got_section (info)->output_section->vma |
| 1797 | + bfinfdpic_got_section (info)->output_offset |
| 1798 | + bfinfdpic_got_initial_offset (info); |
| 1799 | } |
| 1800 | else if (entry->lazyplt) |
| 1801 | { |
| 1802 | if (ad) |
| 1803 | return FALSE; |
| 1804 | |
| 1805 | fd_lazy_rel_offset = ofst; |
| 1806 | |
| 1807 | /* A function descriptor used for lazy or local resolving is |
| 1808 | initialized such that its high word contains the output |
| 1809 | section index in which the PLT entries are located, and |
| 1810 | the low word contains the address of the lazy PLT entry |
| 1811 | entry point, that must be within the memory region |
| 1812 | assigned to that section. */ |
| 1813 | lowword = entry->lzplt_entry + 4 |
| 1814 | + bfinfdpic_plt_section (info)->output_offset |
| 1815 | + bfinfdpic_plt_section (info)->output_section->vma; |
| 1816 | highword = _bfinfdpic_osec_to_segment |
| 1817 | (output_bfd, bfinfdpic_plt_section (info)->output_section); |
| 1818 | } |
| 1819 | else |
| 1820 | { |
| 1821 | /* A function descriptor for a local function gets the index |
| 1822 | of the section. For a non-local function, it's |
| 1823 | disregarded. */ |
| 1824 | lowword = ad; |
| 1825 | if (entry->symndx == -1 && entry->d.h->dynindx != -1 |
| 1826 | && entry->d.h->dynindx == idx) |
| 1827 | highword = 0; |
| 1828 | else |
| 1829 | highword = _bfinfdpic_osec_to_segment |
| 1830 | (output_bfd, sec->output_section); |
| 1831 | } |
| 1832 | |
| 1833 | bfd_put_32 (output_bfd, lowword, |
| 1834 | bfinfdpic_got_section (info)->contents |
| 1835 | + bfinfdpic_got_initial_offset (info) |
| 1836 | + entry->fd_entry); |
| 1837 | bfd_put_32 (output_bfd, highword, |
| 1838 | bfinfdpic_got_section (info)->contents |
| 1839 | + bfinfdpic_got_initial_offset (info) |
| 1840 | + entry->fd_entry + 4); |
| 1841 | } |
| 1842 | |
| 1843 | /* Generate code for the PLT entry. */ |
| 1844 | if (entry->plt_entry != (bfd_vma) -1) |
| 1845 | { |
| 1846 | bfd_byte *plt_code = bfinfdpic_plt_section (info)->contents |
| 1847 | + entry->plt_entry; |
| 1848 | |
| 1849 | BFD_ASSERT (entry->fd_entry); |
| 1850 | |
| 1851 | /* Figure out what kind of PLT entry we need, depending on the |
| 1852 | location of the function descriptor within the GOT. */ |
| 1853 | if (entry->fd_entry >= -(1 << (18 - 1)) |
| 1854 | && entry->fd_entry + 4 < (1 << (18 - 1))) |
| 1855 | { |
| 1856 | /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */ |
| 1857 | bfd_put_32 (output_bfd, |
| 1858 | 0xe519 | ((entry->fd_entry << 14) & 0xFFFF0000), |
| 1859 | plt_code); |
| 1860 | bfd_put_32 (output_bfd, |
| 1861 | 0xe51b | (((entry->fd_entry + 4) << 14) & 0xFFFF0000), |
| 1862 | plt_code + 4); |
| 1863 | plt_code += 8; |
| 1864 | } |
| 1865 | else |
| 1866 | { |
| 1867 | /* P1.L = fd_entry; P1.H = fd_entry; |
| 1868 | P3 = P3 + P1; |
| 1869 | P1 = [P3]; |
| 1870 | P3 = [P3 + 4]; */ |
| 1871 | bfd_put_32 (output_bfd, |
| 1872 | 0xe109 | (entry->fd_entry << 16), |
| 1873 | plt_code); |
| 1874 | bfd_put_32 (output_bfd, |
| 1875 | 0xe149 | (entry->fd_entry & 0xFFFF0000), |
| 1876 | plt_code + 4); |
| 1877 | bfd_put_16 (output_bfd, 0x5ad9, plt_code + 8); |
| 1878 | bfd_put_16 (output_bfd, 0x9159, plt_code + 10); |
| 1879 | bfd_put_16 (output_bfd, 0xac5b, plt_code + 12); |
| 1880 | plt_code += 14; |
| 1881 | } |
| 1882 | /* JUMP (P1) */ |
| 1883 | bfd_put_16 (output_bfd, 0x0051, plt_code); |
| 1884 | } |
| 1885 | |
| 1886 | /* Generate code for the lazy PLT entry. */ |
| 1887 | if (entry->lzplt_entry != (bfd_vma) -1) |
| 1888 | { |
| 1889 | bfd_byte *lzplt_code = bfinfdpic_plt_section (info)->contents |
| 1890 | + entry->lzplt_entry; |
| 1891 | bfd_vma resolverStub_addr; |
| 1892 | |
| 1893 | bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code); |
| 1894 | lzplt_code += 4; |
| 1895 | |
| 1896 | resolverStub_addr = entry->lzplt_entry / BFINFDPIC_LZPLT_BLOCK_SIZE |
| 1897 | * BFINFDPIC_LZPLT_BLOCK_SIZE + BFINFDPIC_LZPLT_RESOLV_LOC; |
| 1898 | if (resolverStub_addr >= bfinfdpic_plt_initial_offset (info)) |
| 1899 | resolverStub_addr = bfinfdpic_plt_initial_offset (info) - LZPLT_NORMAL_SIZE - LZPLT_RESOLVER_EXTRA; |
| 1900 | |
| 1901 | if (entry->lzplt_entry == resolverStub_addr) |
| 1902 | { |
| 1903 | /* This is a lazy PLT entry that includes a resolver call. |
| 1904 | P2 = [P3]; |
| 1905 | R3 = [P3 + 4]; |
| 1906 | JUMP (P2); */ |
| 1907 | bfd_put_32 (output_bfd, |
| 1908 | 0xa05b915a, |
| 1909 | lzplt_code); |
| 1910 | bfd_put_16 (output_bfd, 0x0052, lzplt_code + 4); |
| 1911 | } |
| 1912 | else |
| 1913 | { |
| 1914 | /* JUMP.S resolverStub */ |
| 1915 | bfd_put_16 (output_bfd, |
| 1916 | 0x2000 |
| 1917 | | (((resolverStub_addr - entry->lzplt_entry) |
| 1918 | / 2) & (((bfd_vma)1 << 12) - 1)), |
| 1919 | lzplt_code); |
| 1920 | } |
| 1921 | } |
| 1922 | |
| 1923 | return TRUE; |
| 1924 | } |
| 1925 | |
| 1926 | |
| 1927 | /* Look through the relocs for a section during the first phase, and |
| 1928 | allocate space in the global offset table or procedure linkage |
| 1929 | table. */ |
| 1930 | |
| 1931 | static bfd_boolean |
| 1932 | bfin_check_relocs (bfd * abfd, |
| 1933 | struct bfd_link_info *info, |
| 1934 | asection *sec, |
| 1935 | const Elf_Internal_Rela *relocs) |
| 1936 | { |
| 1937 | bfd *dynobj; |
| 1938 | Elf_Internal_Shdr *symtab_hdr; |
| 1939 | struct elf_link_hash_entry **sym_hashes; |
| 1940 | bfd_signed_vma *local_got_refcounts; |
| 1941 | const Elf_Internal_Rela *rel; |
| 1942 | const Elf_Internal_Rela *rel_end; |
| 1943 | asection *sgot; |
| 1944 | asection *srelgot; |
| 1945 | asection *sreloc; |
| 1946 | if (info->relocatable) |
| 1947 | return TRUE; |
| 1948 | |
| 1949 | dynobj = elf_hash_table (info)->dynobj; |
| 1950 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1951 | sym_hashes = elf_sym_hashes (abfd); |
| 1952 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 1953 | |
| 1954 | sgot = NULL; |
| 1955 | srelgot = NULL; |
| 1956 | sreloc = NULL; |
| 1957 | |
| 1958 | rel_end = relocs + sec->reloc_count; |
| 1959 | for (rel = relocs; rel < rel_end; rel++) |
| 1960 | { |
| 1961 | unsigned long r_symndx; |
| 1962 | struct elf_link_hash_entry *h; |
| 1963 | |
| 1964 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1965 | if (r_symndx < symtab_hdr->sh_info) |
| 1966 | h = NULL; |
| 1967 | else |
| 1968 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1969 | |
| 1970 | switch (ELF32_R_TYPE (rel->r_info)) |
| 1971 | { |
| 1972 | /* This relocation describes the C++ object vtable hierarchy. |
| 1973 | Reconstruct it for later use during GC. */ |
| 1974 | case R_BFIN_GNU_VTINHERIT: |
| 1975 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 1976 | return FALSE; |
| 1977 | break; |
| 1978 | |
| 1979 | /* This relocation describes which C++ vtable entries |
| 1980 | are actually used. Record for later use during GC. */ |
| 1981 | case R_BFIN_GNU_VTENTRY: |
| 1982 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 1983 | return FALSE; |
| 1984 | break; |
| 1985 | |
| 1986 | case R_got: |
| 1987 | if (h != NULL |
| 1988 | && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0) |
| 1989 | break; |
| 1990 | /* Fall through. */ |
| 1991 | |
| 1992 | if (dynobj == NULL) |
| 1993 | { |
| 1994 | /* Create the .got section. */ |
| 1995 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 1996 | if (!_bfd_elf_create_got_section (dynobj, info)) |
| 1997 | return FALSE; |
| 1998 | } |
| 1999 | |
| 2000 | if (sgot == NULL) |
| 2001 | { |
| 2002 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 2003 | BFD_ASSERT (sgot != NULL); |
| 2004 | } |
| 2005 | |
| 2006 | if (srelgot == NULL && (h != NULL || info->shared)) |
| 2007 | { |
| 2008 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 2009 | if (srelgot == NULL) |
| 2010 | { |
| 2011 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| 2012 | | SEC_IN_MEMORY | SEC_LINKER_CREATED |
| 2013 | | SEC_READONLY); |
| 2014 | srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", |
| 2015 | flags); |
| 2016 | if (srelgot == NULL |
| 2017 | || !bfd_set_section_alignment (dynobj, srelgot, 2)) |
| 2018 | return FALSE; |
| 2019 | } |
| 2020 | } |
| 2021 | |
| 2022 | if (h != NULL) |
| 2023 | { |
| 2024 | if (h->got.refcount == 0) |
| 2025 | { |
| 2026 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 2027 | if (h->dynindx == -1 && !h->forced_local) |
| 2028 | { |
| 2029 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
| 2030 | return FALSE; |
| 2031 | } |
| 2032 | |
| 2033 | /* Allocate space in the .got section. */ |
| 2034 | sgot->size += 4; |
| 2035 | /* Allocate relocation space. */ |
| 2036 | srelgot->size += sizeof (Elf32_External_Rela); |
| 2037 | } |
| 2038 | h->got.refcount++; |
| 2039 | } |
| 2040 | else |
| 2041 | { |
| 2042 | /* This is a global offset table entry for a local symbol. */ |
| 2043 | if (local_got_refcounts == NULL) |
| 2044 | { |
| 2045 | bfd_size_type size; |
| 2046 | |
| 2047 | size = symtab_hdr->sh_info; |
| 2048 | size *= sizeof (bfd_signed_vma); |
| 2049 | local_got_refcounts = ((bfd_signed_vma *) |
| 2050 | bfd_zalloc (abfd, size)); |
| 2051 | if (local_got_refcounts == NULL) |
| 2052 | return FALSE; |
| 2053 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 2054 | } |
| 2055 | if (local_got_refcounts[r_symndx] == 0) |
| 2056 | { |
| 2057 | sgot->size += 4; |
| 2058 | if (info->shared) |
| 2059 | { |
| 2060 | /* If we are generating a shared object, we need to |
| 2061 | output a R_68K_RELATIVE reloc so that the dynamic |
| 2062 | linker can adjust this GOT entry. */ |
| 2063 | srelgot->size += sizeof (Elf32_External_Rela); |
| 2064 | } |
| 2065 | } |
| 2066 | local_got_refcounts[r_symndx]++; |
| 2067 | } |
| 2068 | break; |
| 2069 | |
| 2070 | default: |
| 2071 | break; |
| 2072 | } |
| 2073 | } |
| 2074 | |
| 2075 | return TRUE; |
| 2076 | } |
| 2077 | |
| 2078 | static enum elf_reloc_type_class |
| 2079 | elf32_bfin_reloc_type_class (const Elf_Internal_Rela * rela) |
| 2080 | { |
| 2081 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 2082 | { |
| 2083 | default: |
| 2084 | return reloc_class_normal; |
| 2085 | } |
| 2086 | } |
| 2087 | \f |
| 2088 | /* Relocate an Blackfin ELF section. |
| 2089 | |
| 2090 | The RELOCATE_SECTION function is called by the new ELF backend linker |
| 2091 | to handle the relocations for a section. |
| 2092 | |
| 2093 | The relocs are always passed as Rela structures; if the section |
| 2094 | actually uses Rel structures, the r_addend field will always be |
| 2095 | zero. |
| 2096 | |
| 2097 | This function is responsible for adjusting the section contents as |
| 2098 | necessary, and (if using Rela relocs and generating a relocatable |
| 2099 | output file) adjusting the reloc addend as necessary. |
| 2100 | |
| 2101 | This function does not have to worry about setting the reloc |
| 2102 | address or the reloc symbol index. |
| 2103 | |
| 2104 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 2105 | |
| 2106 | LOCAL_SECTIONS is an array giving the section in the input file |
| 2107 | corresponding to the st_shndx field of each local symbol. |
| 2108 | |
| 2109 | The global hash table entry for the global symbols can be found |
| 2110 | via elf_sym_hashes (input_bfd). |
| 2111 | |
| 2112 | When generating relocatable output, this function must handle |
| 2113 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 2114 | going to be the section symbol corresponding to the output |
| 2115 | section, which means that the addend must be adjusted |
| 2116 | accordingly. */ |
| 2117 | |
| 2118 | static bfd_boolean |
| 2119 | bfinfdpic_relocate_section (bfd * output_bfd, |
| 2120 | struct bfd_link_info *info, |
| 2121 | bfd * input_bfd, |
| 2122 | asection * input_section, |
| 2123 | bfd_byte * contents, |
| 2124 | Elf_Internal_Rela * relocs, |
| 2125 | Elf_Internal_Sym * local_syms, |
| 2126 | asection ** local_sections) |
| 2127 | { |
| 2128 | Elf_Internal_Shdr *symtab_hdr; |
| 2129 | struct elf_link_hash_entry **sym_hashes; |
| 2130 | Elf_Internal_Rela *rel; |
| 2131 | Elf_Internal_Rela *relend; |
| 2132 | unsigned isec_segment, got_segment, plt_segment, |
| 2133 | check_segment[2]; |
| 2134 | int silence_segment_error = !(info->shared || info->pie); |
| 2135 | |
| 2136 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
| 2137 | sym_hashes = elf_sym_hashes (input_bfd); |
| 2138 | relend = relocs + input_section->reloc_count; |
| 2139 | |
| 2140 | isec_segment = _bfinfdpic_osec_to_segment (output_bfd, |
| 2141 | input_section->output_section); |
| 2142 | if (IS_FDPIC (output_bfd) && bfinfdpic_got_section (info)) |
| 2143 | got_segment = _bfinfdpic_osec_to_segment (output_bfd, |
| 2144 | bfinfdpic_got_section (info) |
| 2145 | ->output_section); |
| 2146 | else |
| 2147 | got_segment = -1; |
| 2148 | if (IS_FDPIC (output_bfd) && elf_hash_table (info)->dynamic_sections_created) |
| 2149 | plt_segment = _bfinfdpic_osec_to_segment (output_bfd, |
| 2150 | bfinfdpic_plt_section (info) |
| 2151 | ->output_section); |
| 2152 | else |
| 2153 | plt_segment = -1; |
| 2154 | |
| 2155 | for (rel = relocs; rel < relend; rel ++) |
| 2156 | { |
| 2157 | reloc_howto_type *howto; |
| 2158 | unsigned long r_symndx; |
| 2159 | Elf_Internal_Sym *sym; |
| 2160 | asection *sec; |
| 2161 | struct elf_link_hash_entry *h; |
| 2162 | bfd_vma relocation; |
| 2163 | bfd_reloc_status_type r; |
| 2164 | const char * name = NULL; |
| 2165 | int r_type; |
| 2166 | asection *osec; |
| 2167 | struct bfinfdpic_relocs_info *picrel; |
| 2168 | bfd_vma orig_addend = rel->r_addend; |
| 2169 | |
| 2170 | r_type = ELF32_R_TYPE (rel->r_info); |
| 2171 | |
| 2172 | if (r_type == R_BFIN_GNU_VTINHERIT |
| 2173 | || r_type == R_BFIN_GNU_VTENTRY) |
| 2174 | continue; |
| 2175 | |
| 2176 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2177 | howto = bfin_reloc_type_lookup (input_bfd, r_type); |
| 2178 | if (howto == NULL) |
| 2179 | { |
| 2180 | bfd_set_error (bfd_error_bad_value); |
| 2181 | return FALSE; |
| 2182 | } |
| 2183 | |
| 2184 | h = NULL; |
| 2185 | sym = NULL; |
| 2186 | sec = NULL; |
| 2187 | |
| 2188 | if (r_symndx < symtab_hdr->sh_info) |
| 2189 | { |
| 2190 | sym = local_syms + r_symndx; |
| 2191 | osec = sec = local_sections [r_symndx]; |
| 2192 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 2193 | |
| 2194 | name = bfd_elf_string_from_elf_section |
| 2195 | (input_bfd, symtab_hdr->sh_link, sym->st_name); |
| 2196 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; |
| 2197 | } |
| 2198 | else |
| 2199 | { |
| 2200 | bfd_boolean warned; |
| 2201 | bfd_boolean unresolved_reloc; |
| 2202 | |
| 2203 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 2204 | r_symndx, symtab_hdr, sym_hashes, |
| 2205 | h, sec, relocation, |
| 2206 | unresolved_reloc, warned); |
| 2207 | osec = sec; |
| 2208 | } |
| 2209 | |
| 2210 | if (sec != NULL && elf_discarded_section (sec)) |
| 2211 | { |
| 2212 | /* For relocs against symbols from removed linkonce sections, |
| 2213 | or sections discarded by a linker script, we just want the |
| 2214 | section contents zeroed. Avoid any special processing. */ |
| 2215 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); |
| 2216 | rel->r_info = 0; |
| 2217 | rel->r_addend = 0; |
| 2218 | continue; |
| 2219 | } |
| 2220 | |
| 2221 | if (info->relocatable) |
| 2222 | continue; |
| 2223 | |
| 2224 | if (h != NULL |
| 2225 | && (h->root.type == bfd_link_hash_defined |
| 2226 | || h->root.type == bfd_link_hash_defweak) |
| 2227 | && !BFINFDPIC_SYM_LOCAL (info, h)) |
| 2228 | { |
| 2229 | osec = sec = NULL; |
| 2230 | relocation = 0; |
| 2231 | } |
| 2232 | |
| 2233 | switch (r_type) |
| 2234 | { |
| 2235 | case R_pcrel24: |
| 2236 | case R_pcrel24_jump_l: |
| 2237 | case R_byte4_data: |
| 2238 | if (! IS_FDPIC (output_bfd)) |
| 2239 | goto non_fdpic; |
| 2240 | |
| 2241 | case R_BFIN_GOT17M4: |
| 2242 | case R_BFIN_GOTHI: |
| 2243 | case R_BFIN_GOTLO: |
| 2244 | case R_BFIN_FUNCDESC_GOT17M4: |
| 2245 | case R_BFIN_FUNCDESC_GOTHI: |
| 2246 | case R_BFIN_FUNCDESC_GOTLO: |
| 2247 | case R_BFIN_GOTOFF17M4: |
| 2248 | case R_BFIN_GOTOFFHI: |
| 2249 | case R_BFIN_GOTOFFLO: |
| 2250 | case R_BFIN_FUNCDESC_GOTOFF17M4: |
| 2251 | case R_BFIN_FUNCDESC_GOTOFFHI: |
| 2252 | case R_BFIN_FUNCDESC_GOTOFFLO: |
| 2253 | case R_BFIN_FUNCDESC: |
| 2254 | case R_BFIN_FUNCDESC_VALUE: |
| 2255 | if (h != NULL) |
| 2256 | picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info |
| 2257 | (info), input_bfd, h, |
| 2258 | orig_addend, INSERT); |
| 2259 | else |
| 2260 | /* In order to find the entry we created before, we must |
| 2261 | use the original addend, not the one that may have been |
| 2262 | modified by _bfd_elf_rela_local_sym(). */ |
| 2263 | picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info |
| 2264 | (info), input_bfd, r_symndx, |
| 2265 | orig_addend, INSERT); |
| 2266 | if (! picrel) |
| 2267 | return FALSE; |
| 2268 | |
| 2269 | if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info, |
| 2270 | osec, sym, |
| 2271 | rel->r_addend)) |
| 2272 | { |
| 2273 | (*_bfd_error_handler) |
| 2274 | (_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"), |
| 2275 | input_bfd, input_section, rel->r_offset, name); |
| 2276 | return FALSE; |
| 2277 | |
| 2278 | } |
| 2279 | |
| 2280 | break; |
| 2281 | |
| 2282 | default: |
| 2283 | non_fdpic: |
| 2284 | picrel = NULL; |
| 2285 | if (h && ! BFINFDPIC_SYM_LOCAL (info, h)) |
| 2286 | { |
| 2287 | info->callbacks->warning |
| 2288 | (info, _("relocation references symbol not defined in the module"), |
| 2289 | name, input_bfd, input_section, rel->r_offset); |
| 2290 | return FALSE; |
| 2291 | } |
| 2292 | break; |
| 2293 | } |
| 2294 | |
| 2295 | switch (r_type) |
| 2296 | { |
| 2297 | case R_pcrel24: |
| 2298 | case R_pcrel24_jump_l: |
| 2299 | check_segment[0] = isec_segment; |
| 2300 | if (! IS_FDPIC (output_bfd)) |
| 2301 | check_segment[1] = isec_segment; |
| 2302 | else if (picrel->plt) |
| 2303 | { |
| 2304 | relocation = bfinfdpic_plt_section (info)->output_section->vma |
| 2305 | + bfinfdpic_plt_section (info)->output_offset |
| 2306 | + picrel->plt_entry; |
| 2307 | check_segment[1] = plt_segment; |
| 2308 | } |
| 2309 | /* We don't want to warn on calls to undefined weak symbols, |
| 2310 | as calls to them must be protected by non-NULL tests |
| 2311 | anyway, and unprotected calls would invoke undefined |
| 2312 | behavior. */ |
| 2313 | else if (picrel->symndx == -1 |
| 2314 | && picrel->d.h->root.type == bfd_link_hash_undefweak) |
| 2315 | check_segment[1] = check_segment[0]; |
| 2316 | else |
| 2317 | check_segment[1] = sec |
| 2318 | ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section) |
| 2319 | : (unsigned)-1; |
| 2320 | break; |
| 2321 | |
| 2322 | case R_BFIN_GOT17M4: |
| 2323 | case R_BFIN_GOTHI: |
| 2324 | case R_BFIN_GOTLO: |
| 2325 | relocation = picrel->got_entry; |
| 2326 | check_segment[0] = check_segment[1] = got_segment; |
| 2327 | break; |
| 2328 | |
| 2329 | case R_BFIN_FUNCDESC_GOT17M4: |
| 2330 | case R_BFIN_FUNCDESC_GOTHI: |
| 2331 | case R_BFIN_FUNCDESC_GOTLO: |
| 2332 | relocation = picrel->fdgot_entry; |
| 2333 | check_segment[0] = check_segment[1] = got_segment; |
| 2334 | break; |
| 2335 | |
| 2336 | case R_BFIN_GOTOFFHI: |
| 2337 | case R_BFIN_GOTOFF17M4: |
| 2338 | case R_BFIN_GOTOFFLO: |
| 2339 | relocation -= bfinfdpic_got_section (info)->output_section->vma |
| 2340 | + bfinfdpic_got_section (info)->output_offset |
| 2341 | + bfinfdpic_got_initial_offset (info); |
| 2342 | check_segment[0] = got_segment; |
| 2343 | check_segment[1] = sec |
| 2344 | ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section) |
| 2345 | : (unsigned)-1; |
| 2346 | break; |
| 2347 | |
| 2348 | case R_BFIN_FUNCDESC_GOTOFF17M4: |
| 2349 | case R_BFIN_FUNCDESC_GOTOFFHI: |
| 2350 | case R_BFIN_FUNCDESC_GOTOFFLO: |
| 2351 | relocation = picrel->fd_entry; |
| 2352 | check_segment[0] = check_segment[1] = got_segment; |
| 2353 | break; |
| 2354 | |
| 2355 | case R_BFIN_FUNCDESC: |
| 2356 | { |
| 2357 | int dynindx; |
| 2358 | bfd_vma addend = rel->r_addend; |
| 2359 | |
| 2360 | if (! (h && h->root.type == bfd_link_hash_undefweak |
| 2361 | && BFINFDPIC_SYM_LOCAL (info, h))) |
| 2362 | { |
| 2363 | /* If the symbol is dynamic and there may be dynamic |
| 2364 | symbol resolution because we are or are linked with a |
| 2365 | shared library, emit a FUNCDESC relocation such that |
| 2366 | the dynamic linker will allocate the function |
| 2367 | descriptor. If the symbol needs a non-local function |
| 2368 | descriptor but binds locally (e.g., its visibility is |
| 2369 | protected, emit a dynamic relocation decayed to |
| 2370 | section+offset. */ |
| 2371 | if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h) |
| 2372 | && BFINFDPIC_SYM_LOCAL (info, h) |
| 2373 | && !(info->executable && !info->pie)) |
| 2374 | { |
| 2375 | dynindx = elf_section_data (h->root.u.def.section |
| 2376 | ->output_section)->dynindx; |
| 2377 | addend += h->root.u.def.section->output_offset |
| 2378 | + h->root.u.def.value; |
| 2379 | } |
| 2380 | else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)) |
| 2381 | { |
| 2382 | if (addend) |
| 2383 | { |
| 2384 | info->callbacks->warning |
| 2385 | (info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"), |
| 2386 | name, input_bfd, input_section, rel->r_offset); |
| 2387 | return FALSE; |
| 2388 | } |
| 2389 | dynindx = h->dynindx; |
| 2390 | } |
| 2391 | else |
| 2392 | { |
| 2393 | /* Otherwise, we know we have a private function |
| 2394 | descriptor, so reference it directly. */ |
| 2395 | BFD_ASSERT (picrel->privfd); |
| 2396 | r_type = R_byte4_data; |
| 2397 | dynindx = elf_section_data (bfinfdpic_got_section (info) |
| 2398 | ->output_section)->dynindx; |
| 2399 | addend = bfinfdpic_got_section (info)->output_offset |
| 2400 | + bfinfdpic_got_initial_offset (info) |
| 2401 | + picrel->fd_entry; |
| 2402 | } |
| 2403 | |
| 2404 | /* If there is room for dynamic symbol resolution, emit |
| 2405 | the dynamic relocation. However, if we're linking an |
| 2406 | executable at a fixed location, we won't have emitted a |
| 2407 | dynamic symbol entry for the got section, so idx will |
| 2408 | be zero, which means we can and should compute the |
| 2409 | address of the private descriptor ourselves. */ |
| 2410 | if (info->executable && !info->pie |
| 2411 | && (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h))) |
| 2412 | { |
| 2413 | addend += bfinfdpic_got_section (info)->output_section->vma; |
| 2414 | if ((bfd_get_section_flags (output_bfd, |
| 2415 | input_section->output_section) |
| 2416 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) |
| 2417 | { |
| 2418 | if (_bfinfdpic_osec_readonly_p (output_bfd, |
| 2419 | input_section |
| 2420 | ->output_section)) |
| 2421 | { |
| 2422 | info->callbacks->warning |
| 2423 | (info, |
| 2424 | _("cannot emit fixups in read-only section"), |
| 2425 | name, input_bfd, input_section, rel->r_offset); |
| 2426 | return FALSE; |
| 2427 | } |
| 2428 | _bfinfdpic_add_rofixup (output_bfd, |
| 2429 | bfinfdpic_gotfixup_section |
| 2430 | (info), |
| 2431 | _bfd_elf_section_offset |
| 2432 | (output_bfd, info, |
| 2433 | input_section, rel->r_offset) |
| 2434 | + input_section |
| 2435 | ->output_section->vma |
| 2436 | + input_section->output_offset, |
| 2437 | picrel); |
| 2438 | } |
| 2439 | } |
| 2440 | else if ((bfd_get_section_flags (output_bfd, |
| 2441 | input_section->output_section) |
| 2442 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) |
| 2443 | { |
| 2444 | bfd_vma offset; |
| 2445 | |
| 2446 | if (_bfinfdpic_osec_readonly_p (output_bfd, |
| 2447 | input_section |
| 2448 | ->output_section)) |
| 2449 | { |
| 2450 | info->callbacks->warning |
| 2451 | (info, |
| 2452 | _("cannot emit dynamic relocations in read-only section"), |
| 2453 | name, input_bfd, input_section, rel->r_offset); |
| 2454 | return FALSE; |
| 2455 | } |
| 2456 | offset = _bfd_elf_section_offset (output_bfd, info, |
| 2457 | input_section, rel->r_offset); |
| 2458 | /* Only output a reloc for a not deleted entry. */ |
| 2459 | if (offset >= (bfd_vma) -2) |
| 2460 | _bfinfdpic_add_dyn_reloc (output_bfd, |
| 2461 | bfinfdpic_gotrel_section (info), |
| 2462 | 0, |
| 2463 | R_unused0, |
| 2464 | dynindx, addend, picrel); |
| 2465 | else |
| 2466 | _bfinfdpic_add_dyn_reloc (output_bfd, |
| 2467 | bfinfdpic_gotrel_section (info), |
| 2468 | offset + input_section |
| 2469 | ->output_section->vma |
| 2470 | + input_section->output_offset, |
| 2471 | r_type, |
| 2472 | dynindx, addend, picrel); |
| 2473 | } |
| 2474 | else |
| 2475 | addend += bfinfdpic_got_section (info)->output_section->vma; |
| 2476 | } |
| 2477 | |
| 2478 | /* We want the addend in-place because dynamic |
| 2479 | relocations are REL. Setting relocation to it should |
| 2480 | arrange for it to be installed. */ |
| 2481 | relocation = addend - rel->r_addend; |
| 2482 | } |
| 2483 | check_segment[0] = check_segment[1] = got_segment; |
| 2484 | break; |
| 2485 | |
| 2486 | case R_byte4_data: |
| 2487 | if (! IS_FDPIC (output_bfd)) |
| 2488 | { |
| 2489 | check_segment[0] = check_segment[1] = -1; |
| 2490 | break; |
| 2491 | } |
| 2492 | /* Fall through. */ |
| 2493 | case R_BFIN_FUNCDESC_VALUE: |
| 2494 | { |
| 2495 | int dynindx; |
| 2496 | bfd_vma addend = rel->r_addend; |
| 2497 | |
| 2498 | /* If the symbol is dynamic but binds locally, use |
| 2499 | section+offset. */ |
| 2500 | if (h && ! BFINFDPIC_SYM_LOCAL (info, h)) |
| 2501 | { |
| 2502 | if (addend && r_type == R_BFIN_FUNCDESC_VALUE) |
| 2503 | { |
| 2504 | info->callbacks->warning |
| 2505 | (info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"), |
| 2506 | name, input_bfd, input_section, rel->r_offset); |
| 2507 | return FALSE; |
| 2508 | } |
| 2509 | dynindx = h->dynindx; |
| 2510 | } |
| 2511 | else |
| 2512 | { |
| 2513 | if (h) |
| 2514 | addend += h->root.u.def.value; |
| 2515 | else |
| 2516 | addend += sym->st_value; |
| 2517 | if (osec) |
| 2518 | addend += osec->output_offset; |
| 2519 | if (osec && osec->output_section |
| 2520 | && ! bfd_is_abs_section (osec->output_section) |
| 2521 | && ! bfd_is_und_section (osec->output_section)) |
| 2522 | dynindx = elf_section_data (osec->output_section)->dynindx; |
| 2523 | else |
| 2524 | dynindx = 0; |
| 2525 | } |
| 2526 | |
| 2527 | /* If we're linking an executable at a fixed address, we |
| 2528 | can omit the dynamic relocation as long as the symbol |
| 2529 | is defined in the current link unit (which is implied |
| 2530 | by its output section not being NULL). */ |
| 2531 | if (info->executable && !info->pie |
| 2532 | && (!h || BFINFDPIC_SYM_LOCAL (info, h))) |
| 2533 | { |
| 2534 | if (osec) |
| 2535 | addend += osec->output_section->vma; |
| 2536 | if (IS_FDPIC (input_bfd) |
| 2537 | && (bfd_get_section_flags (output_bfd, |
| 2538 | input_section->output_section) |
| 2539 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) |
| 2540 | { |
| 2541 | if (_bfinfdpic_osec_readonly_p (output_bfd, |
| 2542 | input_section |
| 2543 | ->output_section)) |
| 2544 | { |
| 2545 | info->callbacks->warning |
| 2546 | (info, |
| 2547 | _("cannot emit fixups in read-only section"), |
| 2548 | name, input_bfd, input_section, rel->r_offset); |
| 2549 | return FALSE; |
| 2550 | } |
| 2551 | if (!h || h->root.type != bfd_link_hash_undefweak) |
| 2552 | { |
| 2553 | _bfinfdpic_add_rofixup (output_bfd, |
| 2554 | bfinfdpic_gotfixup_section |
| 2555 | (info), |
| 2556 | _bfd_elf_section_offset |
| 2557 | (output_bfd, info, |
| 2558 | input_section, rel->r_offset) |
| 2559 | + input_section |
| 2560 | ->output_section->vma |
| 2561 | + input_section->output_offset, |
| 2562 | picrel); |
| 2563 | if (r_type == R_BFIN_FUNCDESC_VALUE) |
| 2564 | _bfinfdpic_add_rofixup |
| 2565 | (output_bfd, |
| 2566 | bfinfdpic_gotfixup_section (info), |
| 2567 | _bfd_elf_section_offset |
| 2568 | (output_bfd, info, |
| 2569 | input_section, rel->r_offset) |
| 2570 | + input_section->output_section->vma |
| 2571 | + input_section->output_offset + 4, picrel); |
| 2572 | } |
| 2573 | } |
| 2574 | } |
| 2575 | else |
| 2576 | { |
| 2577 | if ((bfd_get_section_flags (output_bfd, |
| 2578 | input_section->output_section) |
| 2579 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) |
| 2580 | { |
| 2581 | if (_bfinfdpic_osec_readonly_p (output_bfd, |
| 2582 | input_section |
| 2583 | ->output_section)) |
| 2584 | { |
| 2585 | info->callbacks->warning |
| 2586 | (info, |
| 2587 | _("cannot emit dynamic relocations in read-only section"), |
| 2588 | name, input_bfd, input_section, rel->r_offset); |
| 2589 | return FALSE; |
| 2590 | } |
| 2591 | _bfinfdpic_add_dyn_reloc (output_bfd, |
| 2592 | bfinfdpic_gotrel_section (info), |
| 2593 | _bfd_elf_section_offset |
| 2594 | (output_bfd, info, |
| 2595 | input_section, rel->r_offset) |
| 2596 | + input_section |
| 2597 | ->output_section->vma |
| 2598 | + input_section->output_offset, |
| 2599 | r_type, dynindx, addend, picrel); |
| 2600 | } |
| 2601 | else if (osec) |
| 2602 | addend += osec->output_section->vma; |
| 2603 | /* We want the addend in-place because dynamic |
| 2604 | relocations are REL. Setting relocation to it |
| 2605 | should arrange for it to be installed. */ |
| 2606 | relocation = addend - rel->r_addend; |
| 2607 | } |
| 2608 | |
| 2609 | if (r_type == R_BFIN_FUNCDESC_VALUE) |
| 2610 | { |
| 2611 | /* If we've omitted the dynamic relocation, just emit |
| 2612 | the fixed addresses of the symbol and of the local |
| 2613 | GOT base offset. */ |
| 2614 | if (info->executable && !info->pie |
| 2615 | && (!h || BFINFDPIC_SYM_LOCAL (info, h))) |
| 2616 | bfd_put_32 (output_bfd, |
| 2617 | bfinfdpic_got_section (info)->output_section->vma |
| 2618 | + bfinfdpic_got_section (info)->output_offset |
| 2619 | + bfinfdpic_got_initial_offset (info), |
| 2620 | contents + rel->r_offset + 4); |
| 2621 | else |
| 2622 | /* A function descriptor used for lazy or local |
| 2623 | resolving is initialized such that its high word |
| 2624 | contains the output section index in which the |
| 2625 | PLT entries are located, and the low word |
| 2626 | contains the offset of the lazy PLT entry entry |
| 2627 | point into that section. */ |
| 2628 | bfd_put_32 (output_bfd, |
| 2629 | h && ! BFINFDPIC_SYM_LOCAL (info, h) |
| 2630 | ? 0 |
| 2631 | : _bfinfdpic_osec_to_segment (output_bfd, |
| 2632 | sec |
| 2633 | ->output_section), |
| 2634 | contents + rel->r_offset + 4); |
| 2635 | } |
| 2636 | } |
| 2637 | check_segment[0] = check_segment[1] = got_segment; |
| 2638 | break; |
| 2639 | |
| 2640 | default: |
| 2641 | check_segment[0] = isec_segment; |
| 2642 | check_segment[1] = sec |
| 2643 | ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section) |
| 2644 | : (unsigned)-1; |
| 2645 | break; |
| 2646 | } |
| 2647 | |
| 2648 | if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd)) |
| 2649 | { |
| 2650 | #if 1 /* If you take this out, remove the #error from fdpic-static-6.d |
| 2651 | in the ld testsuite. */ |
| 2652 | /* This helps catch problems in GCC while we can't do more |
| 2653 | than static linking. The idea is to test whether the |
| 2654 | input file basename is crt0.o only once. */ |
| 2655 | if (silence_segment_error == 1) |
| 2656 | silence_segment_error = |
| 2657 | (strlen (input_bfd->filename) == 6 |
| 2658 | && strcmp (input_bfd->filename, "crt0.o") == 0) |
| 2659 | || (strlen (input_bfd->filename) > 6 |
| 2660 | && strcmp (input_bfd->filename |
| 2661 | + strlen (input_bfd->filename) - 7, |
| 2662 | "/crt0.o") == 0) |
| 2663 | ? -1 : 0; |
| 2664 | #endif |
| 2665 | if (!silence_segment_error |
| 2666 | /* We don't want duplicate errors for undefined |
| 2667 | symbols. */ |
| 2668 | && !(picrel && picrel->symndx == -1 |
| 2669 | && picrel->d.h->root.type == bfd_link_hash_undefined)) |
| 2670 | info->callbacks->warning |
| 2671 | (info, |
| 2672 | (info->shared || info->pie) |
| 2673 | ? _("relocations between different segments are not supported") |
| 2674 | : _("warning: relocation references a different segment"), |
| 2675 | name, input_bfd, input_section, rel->r_offset); |
| 2676 | if (!silence_segment_error && (info->shared || info->pie)) |
| 2677 | return FALSE; |
| 2678 | elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC; |
| 2679 | } |
| 2680 | |
| 2681 | switch (r_type) |
| 2682 | { |
| 2683 | case R_BFIN_GOTOFFHI: |
| 2684 | /* We need the addend to be applied before we shift the |
| 2685 | value right. */ |
| 2686 | relocation += rel->r_addend; |
| 2687 | /* Fall through. */ |
| 2688 | case R_BFIN_GOTHI: |
| 2689 | case R_BFIN_FUNCDESC_GOTHI: |
| 2690 | case R_BFIN_FUNCDESC_GOTOFFHI: |
| 2691 | relocation >>= 16; |
| 2692 | /* Fall through. */ |
| 2693 | |
| 2694 | case R_BFIN_GOTLO: |
| 2695 | case R_BFIN_FUNCDESC_GOTLO: |
| 2696 | case R_BFIN_GOTOFFLO: |
| 2697 | case R_BFIN_FUNCDESC_GOTOFFLO: |
| 2698 | relocation &= 0xffff; |
| 2699 | break; |
| 2700 | |
| 2701 | default: |
| 2702 | break; |
| 2703 | } |
| 2704 | |
| 2705 | switch (r_type) |
| 2706 | { |
| 2707 | case R_pcrel24: |
| 2708 | case R_pcrel24_jump_l: |
| 2709 | if (! IS_FDPIC (output_bfd) || ! picrel->plt) |
| 2710 | break; |
| 2711 | /* Fall through. */ |
| 2712 | |
| 2713 | /* When referencing a GOT entry, a function descriptor or a |
| 2714 | PLT, we don't want the addend to apply to the reference, |
| 2715 | but rather to the referenced symbol. The actual entry |
| 2716 | will have already been created taking the addend into |
| 2717 | account, so cancel it out here. */ |
| 2718 | case R_BFIN_GOT17M4: |
| 2719 | case R_BFIN_GOTHI: |
| 2720 | case R_BFIN_GOTLO: |
| 2721 | case R_BFIN_FUNCDESC_GOT17M4: |
| 2722 | case R_BFIN_FUNCDESC_GOTHI: |
| 2723 | case R_BFIN_FUNCDESC_GOTLO: |
| 2724 | case R_BFIN_FUNCDESC_GOTOFF17M4: |
| 2725 | case R_BFIN_FUNCDESC_GOTOFFHI: |
| 2726 | case R_BFIN_FUNCDESC_GOTOFFLO: |
| 2727 | /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4 |
| 2728 | here, since we do want to apply the addend to the others. |
| 2729 | Note that we've applied the addend to GOTOFFHI before we |
| 2730 | shifted it right. */ |
| 2731 | case R_BFIN_GOTOFFHI: |
| 2732 | relocation -= rel->r_addend; |
| 2733 | break; |
| 2734 | |
| 2735 | default: |
| 2736 | break; |
| 2737 | } |
| 2738 | |
| 2739 | if (r_type == R_pcrel24 |
| 2740 | || r_type == R_pcrel24_jump_l) |
| 2741 | { |
| 2742 | bfd_vma x; |
| 2743 | bfd_vma address = rel->r_offset; |
| 2744 | |
| 2745 | relocation += rel->r_addend; |
| 2746 | |
| 2747 | /* Perform usual pc-relative correction. */ |
| 2748 | relocation -= input_section->output_section->vma + input_section->output_offset; |
| 2749 | relocation -= address; |
| 2750 | |
| 2751 | /* We are getting reloc_entry->address 2 byte off from |
| 2752 | the start of instruction. Assuming absolute postion |
| 2753 | of the reloc data. But, following code had been written assuming |
| 2754 | reloc address is starting at begining of instruction. |
| 2755 | To compensate that I have increased the value of |
| 2756 | relocation by 1 (effectively 2) and used the addr -2 instead of addr. */ |
| 2757 | |
| 2758 | relocation += 2; |
| 2759 | address -= 2; |
| 2760 | |
| 2761 | relocation >>= 1; |
| 2762 | |
| 2763 | x = bfd_get_16 (input_bfd, contents + address); |
| 2764 | x = (x & 0xff00) | ((relocation >> 16) & 0xff); |
| 2765 | bfd_put_16 (input_bfd, x, contents + address); |
| 2766 | |
| 2767 | x = bfd_get_16 (input_bfd, contents + address + 2); |
| 2768 | x = relocation & 0xFFFF; |
| 2769 | bfd_put_16 (input_bfd, x, contents + address + 2); |
| 2770 | r = bfd_reloc_ok; |
| 2771 | } |
| 2772 | else |
| 2773 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 2774 | contents, rel->r_offset, |
| 2775 | relocation, rel->r_addend); |
| 2776 | |
| 2777 | if (r != bfd_reloc_ok) |
| 2778 | { |
| 2779 | const char * msg = (const char *) NULL; |
| 2780 | |
| 2781 | switch (r) |
| 2782 | { |
| 2783 | case bfd_reloc_overflow: |
| 2784 | r = info->callbacks->reloc_overflow |
| 2785 | (info, (h ? &h->root : NULL), name, howto->name, |
| 2786 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); |
| 2787 | break; |
| 2788 | |
| 2789 | case bfd_reloc_undefined: |
| 2790 | r = info->callbacks->undefined_symbol |
| 2791 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); |
| 2792 | break; |
| 2793 | |
| 2794 | case bfd_reloc_outofrange: |
| 2795 | msg = _("internal error: out of range error"); |
| 2796 | break; |
| 2797 | |
| 2798 | case bfd_reloc_notsupported: |
| 2799 | msg = _("internal error: unsupported relocation error"); |
| 2800 | break; |
| 2801 | |
| 2802 | case bfd_reloc_dangerous: |
| 2803 | msg = _("internal error: dangerous relocation"); |
| 2804 | break; |
| 2805 | |
| 2806 | default: |
| 2807 | msg = _("internal error: unknown error"); |
| 2808 | break; |
| 2809 | } |
| 2810 | |
| 2811 | if (msg) |
| 2812 | r = info->callbacks->warning |
| 2813 | (info, msg, name, input_bfd, input_section, rel->r_offset); |
| 2814 | |
| 2815 | if (! r) |
| 2816 | return FALSE; |
| 2817 | } |
| 2818 | } |
| 2819 | |
| 2820 | return TRUE; |
| 2821 | } |
| 2822 | |
| 2823 | static bfd_boolean |
| 2824 | bfin_relocate_section (bfd * output_bfd, |
| 2825 | struct bfd_link_info *info, |
| 2826 | bfd * input_bfd, |
| 2827 | asection * input_section, |
| 2828 | bfd_byte * contents, |
| 2829 | Elf_Internal_Rela * relocs, |
| 2830 | Elf_Internal_Sym * local_syms, |
| 2831 | asection ** local_sections) |
| 2832 | { |
| 2833 | bfd *dynobj; |
| 2834 | Elf_Internal_Shdr *symtab_hdr; |
| 2835 | struct elf_link_hash_entry **sym_hashes; |
| 2836 | bfd_vma *local_got_offsets; |
| 2837 | asection *sgot; |
| 2838 | asection *sreloc; |
| 2839 | Elf_Internal_Rela *rel; |
| 2840 | Elf_Internal_Rela *relend; |
| 2841 | int i = 0; |
| 2842 | |
| 2843 | dynobj = elf_hash_table (info)->dynobj; |
| 2844 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 2845 | sym_hashes = elf_sym_hashes (input_bfd); |
| 2846 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 2847 | |
| 2848 | sgot = NULL; |
| 2849 | sreloc = NULL; |
| 2850 | |
| 2851 | rel = relocs; |
| 2852 | relend = relocs + input_section->reloc_count; |
| 2853 | for (; rel < relend; rel++, i++) |
| 2854 | { |
| 2855 | int r_type; |
| 2856 | reloc_howto_type *howto; |
| 2857 | unsigned long r_symndx; |
| 2858 | struct elf_link_hash_entry *h; |
| 2859 | Elf_Internal_Sym *sym; |
| 2860 | asection *sec; |
| 2861 | bfd_vma relocation = 0; |
| 2862 | bfd_boolean unresolved_reloc; |
| 2863 | bfd_reloc_status_type r; |
| 2864 | bfd_vma address; |
| 2865 | |
| 2866 | r_type = ELF32_R_TYPE (rel->r_info); |
| 2867 | if (r_type < 0 || r_type >= 243) |
| 2868 | { |
| 2869 | bfd_set_error (bfd_error_bad_value); |
| 2870 | return FALSE; |
| 2871 | } |
| 2872 | |
| 2873 | if (r_type == R_BFIN_GNU_VTENTRY |
| 2874 | || r_type == R_BFIN_GNU_VTINHERIT) |
| 2875 | continue; |
| 2876 | |
| 2877 | howto = bfin_reloc_type_lookup (input_bfd, r_type); |
| 2878 | if (howto == NULL) |
| 2879 | { |
| 2880 | bfd_set_error (bfd_error_bad_value); |
| 2881 | return FALSE; |
| 2882 | } |
| 2883 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2884 | |
| 2885 | h = NULL; |
| 2886 | sym = NULL; |
| 2887 | sec = NULL; |
| 2888 | unresolved_reloc = FALSE; |
| 2889 | |
| 2890 | if (r_symndx < symtab_hdr->sh_info) |
| 2891 | { |
| 2892 | sym = local_syms + r_symndx; |
| 2893 | sec = local_sections[r_symndx]; |
| 2894 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 2895 | } |
| 2896 | else |
| 2897 | { |
| 2898 | bfd_boolean warned; |
| 2899 | |
| 2900 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 2901 | r_symndx, symtab_hdr, sym_hashes, |
| 2902 | h, sec, relocation, |
| 2903 | unresolved_reloc, warned); |
| 2904 | } |
| 2905 | |
| 2906 | if (sec != NULL && elf_discarded_section (sec)) |
| 2907 | { |
| 2908 | /* For relocs against symbols from removed linkonce sections, |
| 2909 | or sections discarded by a linker script, we just want the |
| 2910 | section contents zeroed. Avoid any special processing. */ |
| 2911 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); |
| 2912 | rel->r_info = 0; |
| 2913 | rel->r_addend = 0; |
| 2914 | continue; |
| 2915 | } |
| 2916 | |
| 2917 | if (info->relocatable) |
| 2918 | continue; |
| 2919 | |
| 2920 | address = rel->r_offset; |
| 2921 | |
| 2922 | /* Then, process normally. */ |
| 2923 | switch (r_type) |
| 2924 | { |
| 2925 | case R_BFIN_GNU_VTINHERIT: |
| 2926 | case R_BFIN_GNU_VTENTRY: |
| 2927 | return bfd_reloc_ok; |
| 2928 | |
| 2929 | case R_got: |
| 2930 | /* Relocation is to the address of the entry for this symbol |
| 2931 | in the global offset table. */ |
| 2932 | if (h != NULL |
| 2933 | && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0) |
| 2934 | goto do_default; |
| 2935 | /* Fall through. */ |
| 2936 | /* Relocation is the offset of the entry for this symbol in |
| 2937 | the global offset table. */ |
| 2938 | |
| 2939 | { |
| 2940 | bfd_vma off; |
| 2941 | |
| 2942 | if (sgot == NULL) |
| 2943 | { |
| 2944 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 2945 | BFD_ASSERT (sgot != NULL); |
| 2946 | } |
| 2947 | |
| 2948 | if (h != NULL) |
| 2949 | { |
| 2950 | bfd_boolean dyn; |
| 2951 | |
| 2952 | off = h->got.offset; |
| 2953 | BFD_ASSERT (off != (bfd_vma) - 1); |
| 2954 | dyn = elf_hash_table (info)->dynamic_sections_created; |
| 2955 | |
| 2956 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 2957 | || (info->shared |
| 2958 | && (info->symbolic |
| 2959 | || h->dynindx == -1 |
| 2960 | || h->forced_local) |
| 2961 | && h->def_regular)) |
| 2962 | { |
| 2963 | /* This is actually a static link, or it is a |
| 2964 | -Bsymbolic link and the symbol is defined |
| 2965 | locally, or the symbol was forced to be local |
| 2966 | because of a version file.. We must initialize |
| 2967 | this entry in the global offset table. Since |
| 2968 | the offset must always be a multiple of 4, we |
| 2969 | use the least significant bit to record whether |
| 2970 | we have initialized it already. |
| 2971 | |
| 2972 | When doing a dynamic link, we create a .rela.got |
| 2973 | relocation entry to initialize the value. This |
| 2974 | is done in the finish_dynamic_symbol routine. */ |
| 2975 | if ((off & 1) != 0) |
| 2976 | off &= ~1; |
| 2977 | else |
| 2978 | { |
| 2979 | bfd_put_32 (output_bfd, relocation, |
| 2980 | sgot->contents + off); |
| 2981 | h->got.offset |= 1; |
| 2982 | } |
| 2983 | } |
| 2984 | else |
| 2985 | unresolved_reloc = FALSE; |
| 2986 | } |
| 2987 | else |
| 2988 | { |
| 2989 | BFD_ASSERT (local_got_offsets != NULL); |
| 2990 | off = local_got_offsets[r_symndx]; |
| 2991 | BFD_ASSERT (off != (bfd_vma) - 1); |
| 2992 | |
| 2993 | /* The offset must always be a multiple of 4. We use |
| 2994 | the least significant bit to record whether we have |
| 2995 | already generated the necessary reloc. */ |
| 2996 | if ((off & 1) != 0) |
| 2997 | off &= ~1; |
| 2998 | else |
| 2999 | { |
| 3000 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); |
| 3001 | |
| 3002 | if (info->shared) |
| 3003 | { |
| 3004 | asection *s; |
| 3005 | Elf_Internal_Rela outrel; |
| 3006 | bfd_byte *loc; |
| 3007 | |
| 3008 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 3009 | BFD_ASSERT (s != NULL); |
| 3010 | |
| 3011 | outrel.r_offset = (sgot->output_section->vma |
| 3012 | + sgot->output_offset + off); |
| 3013 | outrel.r_info = |
| 3014 | ELF32_R_INFO (0, R_pcrel24); |
| 3015 | outrel.r_addend = relocation; |
| 3016 | loc = s->contents; |
| 3017 | loc += |
| 3018 | s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 3019 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 3020 | } |
| 3021 | |
| 3022 | local_got_offsets[r_symndx] |= 1; |
| 3023 | } |
| 3024 | } |
| 3025 | |
| 3026 | relocation = sgot->output_offset + off; |
| 3027 | rel->r_addend = 0; |
| 3028 | /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */ |
| 3029 | relocation /= 4; |
| 3030 | } |
| 3031 | goto do_default; |
| 3032 | |
| 3033 | case R_pcrel24: |
| 3034 | case R_pcrel24_jump_l: |
| 3035 | { |
| 3036 | bfd_vma x; |
| 3037 | |
| 3038 | relocation += rel->r_addend; |
| 3039 | |
| 3040 | /* Perform usual pc-relative correction. */ |
| 3041 | relocation -= input_section->output_section->vma + input_section->output_offset; |
| 3042 | relocation -= address; |
| 3043 | |
| 3044 | /* We are getting reloc_entry->address 2 byte off from |
| 3045 | the start of instruction. Assuming absolute postion |
| 3046 | of the reloc data. But, following code had been written assuming |
| 3047 | reloc address is starting at begining of instruction. |
| 3048 | To compensate that I have increased the value of |
| 3049 | relocation by 1 (effectively 2) and used the addr -2 instead of addr. */ |
| 3050 | |
| 3051 | relocation += 2; |
| 3052 | address -= 2; |
| 3053 | |
| 3054 | relocation >>= 1; |
| 3055 | |
| 3056 | x = bfd_get_16 (input_bfd, contents + address); |
| 3057 | x = (x & 0xff00) | ((relocation >> 16) & 0xff); |
| 3058 | bfd_put_16 (input_bfd, x, contents + address); |
| 3059 | |
| 3060 | x = bfd_get_16 (input_bfd, contents + address + 2); |
| 3061 | x = relocation & 0xFFFF; |
| 3062 | bfd_put_16 (input_bfd, x, contents + address + 2); |
| 3063 | r = bfd_reloc_ok; |
| 3064 | } |
| 3065 | break; |
| 3066 | |
| 3067 | default: |
| 3068 | do_default: |
| 3069 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3070 | contents, address, |
| 3071 | relocation, rel->r_addend); |
| 3072 | |
| 3073 | break; |
| 3074 | } |
| 3075 | |
| 3076 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| 3077 | because such sections are not SEC_ALLOC and thus ld.so will |
| 3078 | not process them. */ |
| 3079 | if (unresolved_reloc |
| 3080 | && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic)) |
| 3081 | { |
| 3082 | (*_bfd_error_handler) |
| 3083 | (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"), |
| 3084 | input_bfd, |
| 3085 | input_section, (long) rel->r_offset, h->root.root.string); |
| 3086 | return FALSE; |
| 3087 | } |
| 3088 | |
| 3089 | if (r != bfd_reloc_ok) |
| 3090 | { |
| 3091 | const char *name; |
| 3092 | |
| 3093 | if (h != NULL) |
| 3094 | name = h->root.root.string; |
| 3095 | else |
| 3096 | { |
| 3097 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 3098 | symtab_hdr->sh_link, |
| 3099 | sym->st_name); |
| 3100 | if (name == NULL) |
| 3101 | return FALSE; |
| 3102 | if (*name == '\0') |
| 3103 | name = bfd_section_name (input_bfd, sec); |
| 3104 | } |
| 3105 | |
| 3106 | if (r == bfd_reloc_overflow) |
| 3107 | { |
| 3108 | if (!(info->callbacks->reloc_overflow |
| 3109 | (info, (h ? &h->root : NULL), name, howto->name, |
| 3110 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset))) |
| 3111 | return FALSE; |
| 3112 | } |
| 3113 | else |
| 3114 | { |
| 3115 | (*_bfd_error_handler) |
| 3116 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
| 3117 | input_bfd, input_section, |
| 3118 | (long) rel->r_offset, name, (int) r); |
| 3119 | return FALSE; |
| 3120 | } |
| 3121 | } |
| 3122 | } |
| 3123 | |
| 3124 | return TRUE; |
| 3125 | } |
| 3126 | |
| 3127 | static asection * |
| 3128 | bfin_gc_mark_hook (asection * sec, |
| 3129 | struct bfd_link_info *info, |
| 3130 | Elf_Internal_Rela * rel, |
| 3131 | struct elf_link_hash_entry *h, |
| 3132 | Elf_Internal_Sym * sym) |
| 3133 | { |
| 3134 | if (h != NULL) |
| 3135 | switch (ELF32_R_TYPE (rel->r_info)) |
| 3136 | { |
| 3137 | case R_BFIN_GNU_VTINHERIT: |
| 3138 | case R_BFIN_GNU_VTENTRY: |
| 3139 | return NULL; |
| 3140 | } |
| 3141 | |
| 3142 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 3143 | } |
| 3144 | |
| 3145 | /* Update the got entry reference counts for the section being removed. */ |
| 3146 | |
| 3147 | static bfd_boolean |
| 3148 | bfin_gc_sweep_hook (bfd * abfd, |
| 3149 | struct bfd_link_info *info, |
| 3150 | asection * sec, |
| 3151 | const Elf_Internal_Rela * relocs) |
| 3152 | { |
| 3153 | Elf_Internal_Shdr *symtab_hdr; |
| 3154 | struct elf_link_hash_entry **sym_hashes; |
| 3155 | bfd_signed_vma *local_got_refcounts; |
| 3156 | const Elf_Internal_Rela *rel, *relend; |
| 3157 | bfd *dynobj; |
| 3158 | asection *sgot; |
| 3159 | asection *srelgot; |
| 3160 | |
| 3161 | dynobj = elf_hash_table (info)->dynobj; |
| 3162 | if (dynobj == NULL) |
| 3163 | return TRUE; |
| 3164 | |
| 3165 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 3166 | sym_hashes = elf_sym_hashes (abfd); |
| 3167 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 3168 | |
| 3169 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 3170 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 3171 | |
| 3172 | relend = relocs + sec->reloc_count; |
| 3173 | for (rel = relocs; rel < relend; rel++) |
| 3174 | { |
| 3175 | unsigned long r_symndx; |
| 3176 | struct elf_link_hash_entry *h; |
| 3177 | |
| 3178 | switch (ELF32_R_TYPE (rel->r_info)) |
| 3179 | { |
| 3180 | case R_got: |
| 3181 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 3182 | if (r_symndx >= symtab_hdr->sh_info) |
| 3183 | { |
| 3184 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3185 | if (h->got.refcount > 0) |
| 3186 | { |
| 3187 | --h->got.refcount; |
| 3188 | if (h->got.refcount == 0) |
| 3189 | { |
| 3190 | /* We don't need the .got entry any more. */ |
| 3191 | sgot->size -= 4; |
| 3192 | srelgot->size -= sizeof (Elf32_External_Rela); |
| 3193 | } |
| 3194 | } |
| 3195 | } |
| 3196 | else if (local_got_refcounts != NULL) |
| 3197 | { |
| 3198 | if (local_got_refcounts[r_symndx] > 0) |
| 3199 | { |
| 3200 | --local_got_refcounts[r_symndx]; |
| 3201 | if (local_got_refcounts[r_symndx] == 0) |
| 3202 | { |
| 3203 | /* We don't need the .got entry any more. */ |
| 3204 | sgot->size -= 4; |
| 3205 | if (info->shared) |
| 3206 | srelgot->size -= sizeof (Elf32_External_Rela); |
| 3207 | } |
| 3208 | } |
| 3209 | } |
| 3210 | break; |
| 3211 | default: |
| 3212 | break; |
| 3213 | } |
| 3214 | } |
| 3215 | return TRUE; |
| 3216 | } |
| 3217 | |
| 3218 | /* We need dynamic symbols for every section, since segments can |
| 3219 | relocate independently. */ |
| 3220 | static bfd_boolean |
| 3221 | _bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 3222 | struct bfd_link_info *info |
| 3223 | ATTRIBUTE_UNUSED, |
| 3224 | asection *p ATTRIBUTE_UNUSED) |
| 3225 | { |
| 3226 | switch (elf_section_data (p)->this_hdr.sh_type) |
| 3227 | { |
| 3228 | case SHT_PROGBITS: |
| 3229 | case SHT_NOBITS: |
| 3230 | /* If sh_type is yet undecided, assume it could be |
| 3231 | SHT_PROGBITS/SHT_NOBITS. */ |
| 3232 | case SHT_NULL: |
| 3233 | return FALSE; |
| 3234 | |
| 3235 | /* There shouldn't be section relative relocations |
| 3236 | against any other section. */ |
| 3237 | default: |
| 3238 | return TRUE; |
| 3239 | } |
| 3240 | } |
| 3241 | |
| 3242 | /* Create a .got section, as well as its additional info field. This |
| 3243 | is almost entirely copied from |
| 3244 | elflink.c:_bfd_elf_create_got_section(). */ |
| 3245 | |
| 3246 | static bfd_boolean |
| 3247 | _bfin_create_got_section (bfd *abfd, struct bfd_link_info *info) |
| 3248 | { |
| 3249 | flagword flags, pltflags; |
| 3250 | asection *s; |
| 3251 | struct elf_link_hash_entry *h; |
| 3252 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 3253 | int ptralign; |
| 3254 | int offset; |
| 3255 | |
| 3256 | /* This function may be called more than once. */ |
| 3257 | s = bfd_get_section_by_name (abfd, ".got"); |
| 3258 | if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0) |
| 3259 | return TRUE; |
| 3260 | |
| 3261 | /* Machine specific: although pointers are 32-bits wide, we want the |
| 3262 | GOT to be aligned to a 64-bit boundary, such that function |
| 3263 | descriptors in it can be accessed with 64-bit loads and |
| 3264 | stores. */ |
| 3265 | ptralign = 3; |
| 3266 | |
| 3267 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 3268 | | SEC_LINKER_CREATED); |
| 3269 | pltflags = flags; |
| 3270 | |
| 3271 | s = bfd_make_section_with_flags (abfd, ".got", flags); |
| 3272 | if (s == NULL |
| 3273 | || !bfd_set_section_alignment (abfd, s, ptralign)) |
| 3274 | return FALSE; |
| 3275 | |
| 3276 | if (bed->want_got_plt) |
| 3277 | { |
| 3278 | s = bfd_make_section_with_flags (abfd, ".got.plt", flags); |
| 3279 | if (s == NULL |
| 3280 | || !bfd_set_section_alignment (abfd, s, ptralign)) |
| 3281 | return FALSE; |
| 3282 | } |
| 3283 | |
| 3284 | if (bed->want_got_sym) |
| 3285 | { |
| 3286 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got |
| 3287 | (or .got.plt) section. We don't do this in the linker script |
| 3288 | because we don't want to define the symbol if we are not creating |
| 3289 | a global offset table. */ |
| 3290 | h = _bfd_elf_define_linkage_sym (abfd, info, s, "__GLOBAL_OFFSET_TABLE_"); |
| 3291 | elf_hash_table (info)->hgot = h; |
| 3292 | if (h == NULL) |
| 3293 | return FALSE; |
| 3294 | |
| 3295 | /* Machine-specific: we want the symbol for executables as |
| 3296 | well. */ |
| 3297 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 3298 | return FALSE; |
| 3299 | } |
| 3300 | |
| 3301 | /* The first bit of the global offset table is the header. */ |
| 3302 | s->size += bed->got_header_size; |
| 3303 | |
| 3304 | /* This is the machine-specific part. Create and initialize section |
| 3305 | data for the got. */ |
| 3306 | if (IS_FDPIC (abfd)) |
| 3307 | { |
| 3308 | bfinfdpic_got_section (info) = s; |
| 3309 | bfinfdpic_relocs_info (info) = htab_try_create (1, |
| 3310 | bfinfdpic_relocs_info_hash, |
| 3311 | bfinfdpic_relocs_info_eq, |
| 3312 | (htab_del) NULL); |
| 3313 | if (! bfinfdpic_relocs_info (info)) |
| 3314 | return FALSE; |
| 3315 | |
| 3316 | s = bfd_make_section_with_flags (abfd, ".rel.got", |
| 3317 | (flags | SEC_READONLY)); |
| 3318 | if (s == NULL |
| 3319 | || ! bfd_set_section_alignment (abfd, s, 2)) |
| 3320 | return FALSE; |
| 3321 | |
| 3322 | bfinfdpic_gotrel_section (info) = s; |
| 3323 | |
| 3324 | /* Machine-specific. */ |
| 3325 | s = bfd_make_section_with_flags (abfd, ".rofixup", |
| 3326 | (flags | SEC_READONLY)); |
| 3327 | if (s == NULL |
| 3328 | || ! bfd_set_section_alignment (abfd, s, 2)) |
| 3329 | return FALSE; |
| 3330 | |
| 3331 | bfinfdpic_gotfixup_section (info) = s; |
| 3332 | offset = -2048; |
| 3333 | flags = BSF_GLOBAL; |
| 3334 | } |
| 3335 | else |
| 3336 | { |
| 3337 | offset = 2048; |
| 3338 | flags = BSF_GLOBAL | BSF_WEAK; |
| 3339 | } |
| 3340 | |
| 3341 | return TRUE; |
| 3342 | } |
| 3343 | |
| 3344 | /* Make sure the got and plt sections exist, and that our pointers in |
| 3345 | the link hash table point to them. */ |
| 3346 | |
| 3347 | static bfd_boolean |
| 3348 | elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
| 3349 | { |
| 3350 | /* This is mostly copied from |
| 3351 | elflink.c:_bfd_elf_create_dynamic_sections(). */ |
| 3352 | flagword flags, pltflags; |
| 3353 | asection *s; |
| 3354 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 3355 | |
| 3356 | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and |
| 3357 | .rel[a].bss sections. */ |
| 3358 | |
| 3359 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 3360 | | SEC_LINKER_CREATED); |
| 3361 | |
| 3362 | pltflags = flags; |
| 3363 | pltflags |= SEC_CODE; |
| 3364 | if (bed->plt_not_loaded) |
| 3365 | pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS); |
| 3366 | if (bed->plt_readonly) |
| 3367 | pltflags |= SEC_READONLY; |
| 3368 | |
| 3369 | s = bfd_make_section_with_flags (abfd, ".plt", pltflags); |
| 3370 | if (s == NULL |
| 3371 | || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) |
| 3372 | return FALSE; |
| 3373 | /* Blackfin-specific: remember it. */ |
| 3374 | bfinfdpic_plt_section (info) = s; |
| 3375 | |
| 3376 | if (bed->want_plt_sym) |
| 3377 | { |
| 3378 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
| 3379 | .plt section. */ |
| 3380 | struct elf_link_hash_entry *h; |
| 3381 | struct bfd_link_hash_entry *bh = NULL; |
| 3382 | |
| 3383 | if (! (_bfd_generic_link_add_one_symbol |
| 3384 | (info, abfd, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL, |
| 3385 | FALSE, get_elf_backend_data (abfd)->collect, &bh))) |
| 3386 | return FALSE; |
| 3387 | h = (struct elf_link_hash_entry *) bh; |
| 3388 | h->def_regular = 1; |
| 3389 | h->type = STT_OBJECT; |
| 3390 | |
| 3391 | if (! info->executable |
| 3392 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 3393 | return FALSE; |
| 3394 | } |
| 3395 | |
| 3396 | /* Blackfin-specific: we want rel relocations for the plt. */ |
| 3397 | s = bfd_make_section_with_flags (abfd, ".rel.plt", flags | SEC_READONLY); |
| 3398 | if (s == NULL |
| 3399 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
| 3400 | return FALSE; |
| 3401 | /* Blackfin-specific: remember it. */ |
| 3402 | bfinfdpic_pltrel_section (info) = s; |
| 3403 | |
| 3404 | /* Blackfin-specific: we want to create the GOT in the Blackfin way. */ |
| 3405 | if (! _bfin_create_got_section (abfd, info)) |
| 3406 | return FALSE; |
| 3407 | |
| 3408 | /* Blackfin-specific: make sure we created everything we wanted. */ |
| 3409 | BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info) |
| 3410 | /* && bfinfdpic_gotfixup_section (info) */ |
| 3411 | && bfinfdpic_plt_section (info) |
| 3412 | && bfinfdpic_pltrel_section (info)); |
| 3413 | |
| 3414 | if (bed->want_dynbss) |
| 3415 | { |
| 3416 | /* The .dynbss section is a place to put symbols which are defined |
| 3417 | by dynamic objects, are referenced by regular objects, and are |
| 3418 | not functions. We must allocate space for them in the process |
| 3419 | image and use a R_*_COPY reloc to tell the dynamic linker to |
| 3420 | initialize them at run time. The linker script puts the .dynbss |
| 3421 | section into the .bss section of the final image. */ |
| 3422 | s = bfd_make_section_with_flags (abfd, ".dynbss", |
| 3423 | SEC_ALLOC | SEC_LINKER_CREATED); |
| 3424 | if (s == NULL) |
| 3425 | return FALSE; |
| 3426 | |
| 3427 | /* The .rel[a].bss section holds copy relocs. This section is not |
| 3428 | normally needed. We need to create it here, though, so that the |
| 3429 | linker will map it to an output section. We can't just create it |
| 3430 | only if we need it, because we will not know whether we need it |
| 3431 | until we have seen all the input files, and the first time the |
| 3432 | main linker code calls BFD after examining all the input files |
| 3433 | (size_dynamic_sections) the input sections have already been |
| 3434 | mapped to the output sections. If the section turns out not to |
| 3435 | be needed, we can discard it later. We will never need this |
| 3436 | section when generating a shared object, since they do not use |
| 3437 | copy relocs. */ |
| 3438 | if (! info->shared) |
| 3439 | { |
| 3440 | s = bfd_make_section_with_flags (abfd, |
| 3441 | (bed->default_use_rela_p |
| 3442 | ? ".rela.bss" : ".rel.bss"), |
| 3443 | flags | SEC_READONLY); |
| 3444 | if (s == NULL |
| 3445 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
| 3446 | return FALSE; |
| 3447 | } |
| 3448 | } |
| 3449 | |
| 3450 | return TRUE; |
| 3451 | } |
| 3452 | |
| 3453 | /* The name of the dynamic interpreter. This is put in the .interp |
| 3454 | section. */ |
| 3455 | |
| 3456 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" |
| 3457 | |
| 3458 | #define DEFAULT_STACK_SIZE 0x20000 |
| 3459 | |
| 3460 | /* This structure is used to collect the number of entries present in |
| 3461 | each addressable range of the got. */ |
| 3462 | struct _bfinfdpic_dynamic_got_info |
| 3463 | { |
| 3464 | /* Several bits of information about the current link. */ |
| 3465 | struct bfd_link_info *info; |
| 3466 | /* Total size needed for GOT entries within the 18- or 32-bit |
| 3467 | ranges. */ |
| 3468 | bfd_vma got17m4, gothilo; |
| 3469 | /* Total size needed for function descriptor entries within the 18- |
| 3470 | or 32-bit ranges. */ |
| 3471 | bfd_vma fd17m4, fdhilo; |
| 3472 | /* Total size needed function descriptor entries referenced in PLT |
| 3473 | entries, that would be profitable to place in offsets close to |
| 3474 | the PIC register. */ |
| 3475 | bfd_vma fdplt; |
| 3476 | /* Total size needed by lazy PLT entries. */ |
| 3477 | bfd_vma lzplt; |
| 3478 | /* Number of relocations carried over from input object files. */ |
| 3479 | unsigned long relocs; |
| 3480 | /* Number of fixups introduced by relocations in input object files. */ |
| 3481 | unsigned long fixups; |
| 3482 | }; |
| 3483 | |
| 3484 | /* Compute the total GOT size required by each symbol in each range. |
| 3485 | Symbols may require up to 4 words in the GOT: an entry pointing to |
| 3486 | the symbol, an entry pointing to its function descriptor, and a |
| 3487 | private function descriptors taking two words. */ |
| 3488 | |
| 3489 | static int |
| 3490 | _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_) |
| 3491 | { |
| 3492 | struct bfinfdpic_relocs_info *entry = *entryp; |
| 3493 | struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_; |
| 3494 | unsigned relocs = 0, fixups = 0; |
| 3495 | |
| 3496 | /* Allocate space for a GOT entry pointing to the symbol. */ |
| 3497 | if (entry->got17m4) |
| 3498 | dinfo->got17m4 += 4; |
| 3499 | else if (entry->gothilo) |
| 3500 | dinfo->gothilo += 4; |
| 3501 | else |
| 3502 | entry->relocs32--; |
| 3503 | entry->relocs32++; |
| 3504 | |
| 3505 | /* Allocate space for a GOT entry pointing to the function |
| 3506 | descriptor. */ |
| 3507 | if (entry->fdgot17m4) |
| 3508 | dinfo->got17m4 += 4; |
| 3509 | else if (entry->fdgothilo) |
| 3510 | dinfo->gothilo += 4; |
| 3511 | else |
| 3512 | entry->relocsfd--; |
| 3513 | entry->relocsfd++; |
| 3514 | |
| 3515 | /* Decide whether we need a PLT entry, a function descriptor in the |
| 3516 | GOT, and a lazy PLT entry for this symbol. */ |
| 3517 | entry->plt = entry->call |
| 3518 | && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h) |
| 3519 | && elf_hash_table (dinfo->info)->dynamic_sections_created; |
| 3520 | entry->privfd = entry->plt |
| 3521 | || entry->fdgoff17m4 || entry->fdgoffhilo |
| 3522 | || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo) |
| 3523 | && (entry->symndx != -1 |
| 3524 | || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))); |
| 3525 | entry->lazyplt = entry->privfd |
| 3526 | && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h) |
| 3527 | && ! (dinfo->info->flags & DF_BIND_NOW) |
| 3528 | && elf_hash_table (dinfo->info)->dynamic_sections_created; |
| 3529 | |
| 3530 | /* Allocate space for a function descriptor. */ |
| 3531 | if (entry->fdgoff17m4) |
| 3532 | dinfo->fd17m4 += 8; |
| 3533 | else if (entry->privfd && entry->plt) |
| 3534 | dinfo->fdplt += 8; |
| 3535 | else if (entry->privfd) |
| 3536 | dinfo->fdhilo += 8; |
| 3537 | else |
| 3538 | entry->relocsfdv--; |
| 3539 | entry->relocsfdv++; |
| 3540 | |
| 3541 | if (entry->lazyplt) |
| 3542 | dinfo->lzplt += LZPLT_NORMAL_SIZE; |
| 3543 | |
| 3544 | if (!dinfo->info->executable || dinfo->info->pie) |
| 3545 | relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv; |
| 3546 | else |
| 3547 | { |
| 3548 | if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)) |
| 3549 | { |
| 3550 | if (entry->symndx != -1 |
| 3551 | || entry->d.h->root.type != bfd_link_hash_undefweak) |
| 3552 | fixups += entry->relocs32 + 2 * entry->relocsfdv; |
| 3553 | } |
| 3554 | else |
| 3555 | relocs += entry->relocs32 + entry->relocsfdv; |
| 3556 | |
| 3557 | if (entry->symndx != -1 |
| 3558 | || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)) |
| 3559 | { |
| 3560 | if (entry->symndx != -1 |
| 3561 | || entry->d.h->root.type != bfd_link_hash_undefweak) |
| 3562 | fixups += entry->relocsfd; |
| 3563 | } |
| 3564 | else |
| 3565 | relocs += entry->relocsfd; |
| 3566 | } |
| 3567 | |
| 3568 | entry->dynrelocs += relocs; |
| 3569 | entry->fixups += fixups; |
| 3570 | dinfo->relocs += relocs; |
| 3571 | dinfo->fixups += fixups; |
| 3572 | |
| 3573 | return 1; |
| 3574 | } |
| 3575 | |
| 3576 | /* This structure is used to assign offsets to got entries, function |
| 3577 | descriptors, plt entries and lazy plt entries. */ |
| 3578 | |
| 3579 | struct _bfinfdpic_dynamic_got_plt_info |
| 3580 | { |
| 3581 | /* Summary information collected with _bfinfdpic_count_got_plt_entries. */ |
| 3582 | struct _bfinfdpic_dynamic_got_info g; |
| 3583 | |
| 3584 | /* For each addressable range, we record a MAX (positive) and MIN |
| 3585 | (negative) value. CUR is used to assign got entries, and it's |
| 3586 | incremented from an initial positive value to MAX, then from MIN |
| 3587 | to FDCUR (unless FDCUR wraps around first). FDCUR is used to |
| 3588 | assign function descriptors, and it's decreased from an initial |
| 3589 | non-positive value to MIN, then from MAX down to CUR (unless CUR |
| 3590 | wraps around first). All of MIN, MAX, CUR and FDCUR always point |
| 3591 | to even words. ODD, if non-zero, indicates an odd word to be |
| 3592 | used for the next got entry, otherwise CUR is used and |
| 3593 | incremented by a pair of words, wrapping around when it reaches |
| 3594 | MAX. FDCUR is decremented (and wrapped) before the next function |
| 3595 | descriptor is chosen. FDPLT indicates the number of remaining |
| 3596 | slots that can be used for function descriptors used only by PLT |
| 3597 | entries. */ |
| 3598 | struct _bfinfdpic_dynamic_got_alloc_data |
| 3599 | { |
| 3600 | bfd_signed_vma max, cur, odd, fdcur, min; |
| 3601 | bfd_vma fdplt; |
| 3602 | } got17m4, gothilo; |
| 3603 | }; |
| 3604 | |
| 3605 | /* Determine the positive and negative ranges to be used by each |
| 3606 | offset range in the GOT. FDCUR and CUR, that must be aligned to a |
| 3607 | double-word boundary, are the minimum (negative) and maximum |
| 3608 | (positive) GOT offsets already used by previous ranges, except for |
| 3609 | an ODD entry that may have been left behind. GOT and FD indicate |
| 3610 | the size of GOT entries and function descriptors that must be |
| 3611 | placed within the range from -WRAP to WRAP. If there's room left, |
| 3612 | up to FDPLT bytes should be reserved for additional function |
| 3613 | descriptors. */ |
| 3614 | |
| 3615 | inline static bfd_signed_vma |
| 3616 | _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad, |
| 3617 | bfd_signed_vma fdcur, |
| 3618 | bfd_signed_vma odd, |
| 3619 | bfd_signed_vma cur, |
| 3620 | bfd_vma got, |
| 3621 | bfd_vma fd, |
| 3622 | bfd_vma fdplt, |
| 3623 | bfd_vma wrap) |
| 3624 | { |
| 3625 | bfd_signed_vma wrapmin = -wrap; |
| 3626 | |
| 3627 | /* Start at the given initial points. */ |
| 3628 | gad->fdcur = fdcur; |
| 3629 | gad->cur = cur; |
| 3630 | |
| 3631 | /* If we had an incoming odd word and we have any got entries that |
| 3632 | are going to use it, consume it, otherwise leave gad->odd at |
| 3633 | zero. We might force gad->odd to zero and return the incoming |
| 3634 | odd such that it is used by the next range, but then GOT entries |
| 3635 | might appear to be out of order and we wouldn't be able to |
| 3636 | shorten the GOT by one word if it turns out to end with an |
| 3637 | unpaired GOT entry. */ |
| 3638 | if (odd && got) |
| 3639 | { |
| 3640 | gad->odd = odd; |
| 3641 | got -= 4; |
| 3642 | odd = 0; |
| 3643 | } |
| 3644 | else |
| 3645 | gad->odd = 0; |
| 3646 | |
| 3647 | /* If we're left with an unpaired GOT entry, compute its location |
| 3648 | such that we can return it. Otherwise, if got doesn't require an |
| 3649 | odd number of words here, either odd was already zero in the |
| 3650 | block above, or it was set to zero because got was non-zero, or |
| 3651 | got was already zero. In the latter case, we want the value of |
| 3652 | odd to carry over to the return statement, so we don't want to |
| 3653 | reset odd unless the condition below is true. */ |
| 3654 | if (got & 4) |
| 3655 | { |
| 3656 | odd = cur + got; |
| 3657 | got += 4; |
| 3658 | } |
| 3659 | |
| 3660 | /* Compute the tentative boundaries of this range. */ |
| 3661 | gad->max = cur + got; |
| 3662 | gad->min = fdcur - fd; |
| 3663 | gad->fdplt = 0; |
| 3664 | |
| 3665 | /* If function descriptors took too much space, wrap some of them |
| 3666 | around. */ |
| 3667 | if (gad->min < wrapmin) |
| 3668 | { |
| 3669 | gad->max += wrapmin - gad->min; |
| 3670 | gad->min = wrapmin; |
| 3671 | } |
| 3672 | /* If there is space left and we have function descriptors |
| 3673 | referenced in PLT entries that could take advantage of shorter |
| 3674 | offsets, place them here. */ |
| 3675 | else if (fdplt && gad->min > wrapmin) |
| 3676 | { |
| 3677 | bfd_vma fds; |
| 3678 | if ((bfd_vma) (gad->min - wrapmin) < fdplt) |
| 3679 | fds = gad->min - wrapmin; |
| 3680 | else |
| 3681 | fds = fdplt; |
| 3682 | |
| 3683 | fdplt -= fds; |
| 3684 | gad->min -= fds; |
| 3685 | gad->fdplt += fds; |
| 3686 | } |
| 3687 | |
| 3688 | /* If GOT entries took too much space, wrap some of them around. |
| 3689 | This may well cause gad->min to become lower than wrapmin. This |
| 3690 | will cause a relocation overflow later on, so we don't have to |
| 3691 | report it here . */ |
| 3692 | if ((bfd_vma) gad->max > wrap) |
| 3693 | { |
| 3694 | gad->min -= gad->max - wrap; |
| 3695 | gad->max = wrap; |
| 3696 | } |
| 3697 | /* If there is more space left, try to place some more function |
| 3698 | descriptors for PLT entries. */ |
| 3699 | else if (fdplt && (bfd_vma) gad->max < wrap) |
| 3700 | { |
| 3701 | bfd_vma fds; |
| 3702 | if ((bfd_vma) (wrap - gad->max) < fdplt) |
| 3703 | fds = wrap - gad->max; |
| 3704 | else |
| 3705 | fds = fdplt; |
| 3706 | |
| 3707 | fdplt -= fds; |
| 3708 | gad->max += fds; |
| 3709 | gad->fdplt += fds; |
| 3710 | } |
| 3711 | |
| 3712 | /* If odd was initially computed as an offset past the wrap point, |
| 3713 | wrap it around. */ |
| 3714 | if (odd > gad->max) |
| 3715 | odd = gad->min + odd - gad->max; |
| 3716 | |
| 3717 | /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed |
| 3718 | before returning, so do it here too. This guarantees that, |
| 3719 | should cur and fdcur meet at the wrap point, they'll both be |
| 3720 | equal to min. */ |
| 3721 | if (gad->cur == gad->max) |
| 3722 | gad->cur = gad->min; |
| 3723 | |
| 3724 | return odd; |
| 3725 | } |
| 3726 | |
| 3727 | /* Compute the location of the next GOT entry, given the allocation |
| 3728 | data for a range. */ |
| 3729 | |
| 3730 | inline static bfd_signed_vma |
| 3731 | _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad) |
| 3732 | { |
| 3733 | bfd_signed_vma ret; |
| 3734 | |
| 3735 | if (gad->odd) |
| 3736 | { |
| 3737 | /* If there was an odd word left behind, use it. */ |
| 3738 | ret = gad->odd; |
| 3739 | gad->odd = 0; |
| 3740 | } |
| 3741 | else |
| 3742 | { |
| 3743 | /* Otherwise, use the word pointed to by cur, reserve the next |
| 3744 | as an odd word, and skip to the next pair of words, possibly |
| 3745 | wrapping around. */ |
| 3746 | ret = gad->cur; |
| 3747 | gad->odd = gad->cur + 4; |
| 3748 | gad->cur += 8; |
| 3749 | if (gad->cur == gad->max) |
| 3750 | gad->cur = gad->min; |
| 3751 | } |
| 3752 | |
| 3753 | return ret; |
| 3754 | } |
| 3755 | |
| 3756 | /* Compute the location of the next function descriptor entry in the |
| 3757 | GOT, given the allocation data for a range. */ |
| 3758 | |
| 3759 | inline static bfd_signed_vma |
| 3760 | _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad) |
| 3761 | { |
| 3762 | /* If we're at the bottom, wrap around, and only then allocate the |
| 3763 | next pair of words. */ |
| 3764 | if (gad->fdcur == gad->min) |
| 3765 | gad->fdcur = gad->max; |
| 3766 | return gad->fdcur -= 8; |
| 3767 | } |
| 3768 | |
| 3769 | /* Assign GOT offsets for every GOT entry and function descriptor. |
| 3770 | Doing everything in a single pass is tricky. */ |
| 3771 | |
| 3772 | static int |
| 3773 | _bfinfdpic_assign_got_entries (void **entryp, void *info_) |
| 3774 | { |
| 3775 | struct bfinfdpic_relocs_info *entry = *entryp; |
| 3776 | struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_; |
| 3777 | |
| 3778 | if (entry->got17m4) |
| 3779 | entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4); |
| 3780 | else if (entry->gothilo) |
| 3781 | entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo); |
| 3782 | |
| 3783 | if (entry->fdgot17m4) |
| 3784 | entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4); |
| 3785 | else if (entry->fdgothilo) |
| 3786 | entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo); |
| 3787 | |
| 3788 | if (entry->fdgoff17m4) |
| 3789 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4); |
| 3790 | else if (entry->plt && dinfo->got17m4.fdplt) |
| 3791 | { |
| 3792 | dinfo->got17m4.fdplt -= 8; |
| 3793 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4); |
| 3794 | } |
| 3795 | else if (entry->plt) |
| 3796 | { |
| 3797 | dinfo->gothilo.fdplt -= 8; |
| 3798 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo); |
| 3799 | } |
| 3800 | else if (entry->privfd) |
| 3801 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo); |
| 3802 | |
| 3803 | return 1; |
| 3804 | } |
| 3805 | |
| 3806 | /* Assign GOT offsets to private function descriptors used by PLT |
| 3807 | entries (or referenced by 32-bit offsets), as well as PLT entries |
| 3808 | and lazy PLT entries. */ |
| 3809 | |
| 3810 | static int |
| 3811 | _bfinfdpic_assign_plt_entries (void **entryp, void *info_) |
| 3812 | { |
| 3813 | struct bfinfdpic_relocs_info *entry = *entryp; |
| 3814 | struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_; |
| 3815 | |
| 3816 | /* If this symbol requires a local function descriptor, allocate |
| 3817 | one. */ |
| 3818 | if (entry->privfd && entry->fd_entry == 0) |
| 3819 | { |
| 3820 | if (dinfo->got17m4.fdplt) |
| 3821 | { |
| 3822 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4); |
| 3823 | dinfo->got17m4.fdplt -= 8; |
| 3824 | } |
| 3825 | else |
| 3826 | { |
| 3827 | BFD_ASSERT (dinfo->gothilo.fdplt); |
| 3828 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo); |
| 3829 | dinfo->gothilo.fdplt -= 8; |
| 3830 | } |
| 3831 | } |
| 3832 | |
| 3833 | if (entry->plt) |
| 3834 | { |
| 3835 | int size; |
| 3836 | |
| 3837 | /* We use the section's raw size to mark the location of the |
| 3838 | next PLT entry. */ |
| 3839 | entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size; |
| 3840 | |
| 3841 | /* Figure out the length of this PLT entry based on the |
| 3842 | addressing mode we need to reach the function descriptor. */ |
| 3843 | BFD_ASSERT (entry->fd_entry); |
| 3844 | if (entry->fd_entry >= -(1 << (18 - 1)) |
| 3845 | && entry->fd_entry + 4 < (1 << (18 - 1))) |
| 3846 | size = 10; |
| 3847 | else |
| 3848 | size = 16; |
| 3849 | |
| 3850 | bfinfdpic_plt_section (dinfo->g.info)->size += size; |
| 3851 | } |
| 3852 | |
| 3853 | if (entry->lazyplt) |
| 3854 | { |
| 3855 | entry->lzplt_entry = dinfo->g.lzplt; |
| 3856 | dinfo->g.lzplt += LZPLT_NORMAL_SIZE; |
| 3857 | /* If this entry is the one that gets the resolver stub, account |
| 3858 | for the additional instruction. */ |
| 3859 | if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE |
| 3860 | == BFINFDPIC_LZPLT_RESOLV_LOC) |
| 3861 | dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA; |
| 3862 | } |
| 3863 | |
| 3864 | return 1; |
| 3865 | } |
| 3866 | |
| 3867 | /* Follow indirect and warning hash entries so that each got entry |
| 3868 | points to the final symbol definition. P must point to a pointer |
| 3869 | to the hash table we're traversing. Since this traversal may |
| 3870 | modify the hash table, we set this pointer to NULL to indicate |
| 3871 | we've made a potentially-destructive change to the hash table, so |
| 3872 | the traversal must be restarted. */ |
| 3873 | static int |
| 3874 | _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p) |
| 3875 | { |
| 3876 | struct bfinfdpic_relocs_info *entry = *entryp; |
| 3877 | htab_t *htab = p; |
| 3878 | |
| 3879 | if (entry->symndx == -1) |
| 3880 | { |
| 3881 | struct elf_link_hash_entry *h = entry->d.h; |
| 3882 | struct bfinfdpic_relocs_info *oentry; |
| 3883 | |
| 3884 | while (h->root.type == bfd_link_hash_indirect |
| 3885 | || h->root.type == bfd_link_hash_warning) |
| 3886 | h = (struct elf_link_hash_entry *)h->root.u.i.link; |
| 3887 | |
| 3888 | if (entry->d.h == h) |
| 3889 | return 1; |
| 3890 | |
| 3891 | oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend, |
| 3892 | NO_INSERT); |
| 3893 | |
| 3894 | if (oentry) |
| 3895 | { |
| 3896 | /* Merge the two entries. */ |
| 3897 | bfinfdpic_pic_merge_early_relocs_info (oentry, entry); |
| 3898 | htab_clear_slot (*htab, entryp); |
| 3899 | return 1; |
| 3900 | } |
| 3901 | |
| 3902 | entry->d.h = h; |
| 3903 | |
| 3904 | /* If we can't find this entry with the new bfd hash, re-insert |
| 3905 | it, and get the traversal restarted. */ |
| 3906 | if (! htab_find (*htab, entry)) |
| 3907 | { |
| 3908 | htab_clear_slot (*htab, entryp); |
| 3909 | entryp = htab_find_slot (*htab, entry, INSERT); |
| 3910 | if (! *entryp) |
| 3911 | *entryp = entry; |
| 3912 | /* Abort the traversal, since the whole table may have |
| 3913 | moved, and leave it up to the parent to restart the |
| 3914 | process. */ |
| 3915 | *(htab_t *)p = NULL; |
| 3916 | return 0; |
| 3917 | } |
| 3918 | } |
| 3919 | |
| 3920 | return 1; |
| 3921 | } |
| 3922 | |
| 3923 | /* Set the sizes of the dynamic sections. */ |
| 3924 | |
| 3925 | static bfd_boolean |
| 3926 | elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd, |
| 3927 | struct bfd_link_info *info) |
| 3928 | { |
| 3929 | bfd *dynobj; |
| 3930 | asection *s; |
| 3931 | struct _bfinfdpic_dynamic_got_plt_info gpinfo; |
| 3932 | bfd_signed_vma odd; |
| 3933 | bfd_vma limit; |
| 3934 | |
| 3935 | dynobj = elf_hash_table (info)->dynobj; |
| 3936 | BFD_ASSERT (dynobj != NULL); |
| 3937 | |
| 3938 | if (elf_hash_table (info)->dynamic_sections_created) |
| 3939 | { |
| 3940 | /* Set the contents of the .interp section to the interpreter. */ |
| 3941 | if (info->executable) |
| 3942 | { |
| 3943 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 3944 | BFD_ASSERT (s != NULL); |
| 3945 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 3946 | s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER; |
| 3947 | } |
| 3948 | } |
| 3949 | |
| 3950 | memset (&gpinfo, 0, sizeof (gpinfo)); |
| 3951 | gpinfo.g.info = info; |
| 3952 | |
| 3953 | for (;;) |
| 3954 | { |
| 3955 | htab_t relocs = bfinfdpic_relocs_info (info); |
| 3956 | |
| 3957 | htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs); |
| 3958 | |
| 3959 | if (relocs == bfinfdpic_relocs_info (info)) |
| 3960 | break; |
| 3961 | } |
| 3962 | |
| 3963 | htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries, |
| 3964 | &gpinfo.g); |
| 3965 | |
| 3966 | odd = 12; |
| 3967 | /* Compute the total size taken by entries in the 18-bit range, |
| 3968 | to tell how many PLT function descriptors we can bring into it |
| 3969 | without causing it to overflow. */ |
| 3970 | limit = odd + gpinfo.g.got17m4 + gpinfo.g.fd17m4; |
| 3971 | if (limit < (bfd_vma)1 << 18) |
| 3972 | limit = ((bfd_vma)1 << 18) - limit; |
| 3973 | else |
| 3974 | limit = 0; |
| 3975 | if (gpinfo.g.fdplt < limit) |
| 3976 | limit = gpinfo.g.fdplt; |
| 3977 | |
| 3978 | /* Determine the ranges of GOT offsets that we can use for each |
| 3979 | range of addressing modes. */ |
| 3980 | odd = _bfinfdpic_compute_got_alloc_data (&gpinfo.got17m4, |
| 3981 | 0, |
| 3982 | odd, |
| 3983 | 16, |
| 3984 | gpinfo.g.got17m4, |
| 3985 | gpinfo.g.fd17m4, |
| 3986 | limit, |
| 3987 | (bfd_vma)1 << (18-1)); |
| 3988 | odd = _bfinfdpic_compute_got_alloc_data (&gpinfo.gothilo, |
| 3989 | gpinfo.got17m4.min, |
| 3990 | odd, |
| 3991 | gpinfo.got17m4.max, |
| 3992 | gpinfo.g.gothilo, |
| 3993 | gpinfo.g.fdhilo, |
| 3994 | gpinfo.g.fdplt - gpinfo.got17m4.fdplt, |
| 3995 | (bfd_vma)1 << (32-1)); |
| 3996 | |
| 3997 | /* Now assign (most) GOT offsets. */ |
| 3998 | htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries, |
| 3999 | &gpinfo); |
| 4000 | |
| 4001 | bfinfdpic_got_section (info)->size = gpinfo.gothilo.max |
| 4002 | - gpinfo.gothilo.min |
| 4003 | /* If an odd word is the last word of the GOT, we don't need this |
| 4004 | word to be part of the GOT. */ |
| 4005 | - (odd + 4 == gpinfo.gothilo.max ? 4 : 0); |
| 4006 | if (bfinfdpic_got_section (info)->size == 0) |
| 4007 | bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE; |
| 4008 | else if (bfinfdpic_got_section (info)->size == 12 |
| 4009 | && ! elf_hash_table (info)->dynamic_sections_created) |
| 4010 | { |
| 4011 | bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE; |
| 4012 | bfinfdpic_got_section (info)->size = 0; |
| 4013 | } |
| 4014 | else |
| 4015 | { |
| 4016 | bfinfdpic_got_section (info)->contents = |
| 4017 | (bfd_byte *) bfd_zalloc (dynobj, |
| 4018 | bfinfdpic_got_section (info)->size); |
| 4019 | if (bfinfdpic_got_section (info)->contents == NULL) |
| 4020 | return FALSE; |
| 4021 | } |
| 4022 | |
| 4023 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4024 | /* Subtract the number of lzplt entries, since those will generate |
| 4025 | relocations in the pltrel section. */ |
| 4026 | bfinfdpic_gotrel_section (info)->size = |
| 4027 | (gpinfo.g.relocs - gpinfo.g.lzplt / LZPLT_NORMAL_SIZE) |
| 4028 | * get_elf_backend_data (output_bfd)->s->sizeof_rel; |
| 4029 | else |
| 4030 | BFD_ASSERT (gpinfo.g.relocs == 0); |
| 4031 | if (bfinfdpic_gotrel_section (info)->size == 0) |
| 4032 | bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE; |
| 4033 | else |
| 4034 | { |
| 4035 | bfinfdpic_gotrel_section (info)->contents = |
| 4036 | (bfd_byte *) bfd_zalloc (dynobj, |
| 4037 | bfinfdpic_gotrel_section (info)->size); |
| 4038 | if (bfinfdpic_gotrel_section (info)->contents == NULL) |
| 4039 | return FALSE; |
| 4040 | } |
| 4041 | |
| 4042 | bfinfdpic_gotfixup_section (info)->size = (gpinfo.g.fixups + 1) * 4; |
| 4043 | if (bfinfdpic_gotfixup_section (info)->size == 0) |
| 4044 | bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE; |
| 4045 | else |
| 4046 | { |
| 4047 | bfinfdpic_gotfixup_section (info)->contents = |
| 4048 | (bfd_byte *) bfd_zalloc (dynobj, |
| 4049 | bfinfdpic_gotfixup_section (info)->size); |
| 4050 | if (bfinfdpic_gotfixup_section (info)->contents == NULL) |
| 4051 | return FALSE; |
| 4052 | } |
| 4053 | |
| 4054 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4055 | { |
| 4056 | bfinfdpic_pltrel_section (info)->size = |
| 4057 | gpinfo.g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel; |
| 4058 | if (bfinfdpic_pltrel_section (info)->size == 0) |
| 4059 | bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE; |
| 4060 | else |
| 4061 | { |
| 4062 | bfinfdpic_pltrel_section (info)->contents = |
| 4063 | (bfd_byte *) bfd_zalloc (dynobj, |
| 4064 | bfinfdpic_pltrel_section (info)->size); |
| 4065 | if (bfinfdpic_pltrel_section (info)->contents == NULL) |
| 4066 | return FALSE; |
| 4067 | } |
| 4068 | } |
| 4069 | |
| 4070 | /* Add 4 bytes for every block of at most 65535 lazy PLT entries, |
| 4071 | such that there's room for the additional instruction needed to |
| 4072 | call the resolver. Since _bfinfdpic_assign_got_entries didn't |
| 4073 | account for them, our block size is 4 bytes smaller than the real |
| 4074 | block size. */ |
| 4075 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4076 | { |
| 4077 | bfinfdpic_plt_section (info)->size = gpinfo.g.lzplt |
| 4078 | + ((gpinfo.g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE) |
| 4079 | / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA); |
| 4080 | } |
| 4081 | |
| 4082 | /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to |
| 4083 | actually assign lazy PLT entries addresses. */ |
| 4084 | gpinfo.g.lzplt = 0; |
| 4085 | |
| 4086 | /* Save information that we're going to need to generate GOT and PLT |
| 4087 | entries. */ |
| 4088 | bfinfdpic_got_initial_offset (info) = -gpinfo.gothilo.min; |
| 4089 | |
| 4090 | if (get_elf_backend_data (output_bfd)->want_got_sym) |
| 4091 | elf_hash_table (info)->hgot->root.u.def.value |
| 4092 | += bfinfdpic_got_initial_offset (info); |
| 4093 | |
| 4094 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4095 | bfinfdpic_plt_initial_offset (info) = |
| 4096 | bfinfdpic_plt_section (info)->size; |
| 4097 | |
| 4098 | htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries, |
| 4099 | &gpinfo); |
| 4100 | |
| 4101 | /* Allocate the PLT section contents only after |
| 4102 | _bfinfdpic_assign_plt_entries has a chance to add the size of the |
| 4103 | non-lazy PLT entries. */ |
| 4104 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4105 | { |
| 4106 | if (bfinfdpic_plt_section (info)->size == 0) |
| 4107 | bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE; |
| 4108 | else |
| 4109 | { |
| 4110 | bfinfdpic_plt_section (info)->contents = |
| 4111 | (bfd_byte *) bfd_zalloc (dynobj, |
| 4112 | bfinfdpic_plt_section (info)->size); |
| 4113 | if (bfinfdpic_plt_section (info)->contents == NULL) |
| 4114 | return FALSE; |
| 4115 | } |
| 4116 | } |
| 4117 | |
| 4118 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4119 | { |
| 4120 | if (bfinfdpic_got_section (info)->size) |
| 4121 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)) |
| 4122 | return FALSE; |
| 4123 | |
| 4124 | if (bfinfdpic_pltrel_section (info)->size) |
| 4125 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0) |
| 4126 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL) |
| 4127 | || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0)) |
| 4128 | return FALSE; |
| 4129 | |
| 4130 | if (bfinfdpic_gotrel_section (info)->size) |
| 4131 | if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0) |
| 4132 | || !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0) |
| 4133 | || !_bfd_elf_add_dynamic_entry (info, DT_RELENT, |
| 4134 | sizeof (Elf32_External_Rel))) |
| 4135 | return FALSE; |
| 4136 | } |
| 4137 | |
| 4138 | return TRUE; |
| 4139 | } |
| 4140 | |
| 4141 | static bfd_boolean |
| 4142 | elf32_bfinfdpic_always_size_sections (bfd *output_bfd, |
| 4143 | struct bfd_link_info *info) |
| 4144 | { |
| 4145 | if (!info->relocatable) |
| 4146 | { |
| 4147 | struct elf_link_hash_entry *h; |
| 4148 | |
| 4149 | /* Force a PT_GNU_STACK segment to be created. */ |
| 4150 | if (! elf_tdata (output_bfd)->stack_flags) |
| 4151 | elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X; |
| 4152 | |
| 4153 | /* Define __stacksize if it's not defined yet. */ |
| 4154 | h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize", |
| 4155 | FALSE, FALSE, FALSE); |
| 4156 | if (! h || h->root.type != bfd_link_hash_defined |
| 4157 | || h->type != STT_OBJECT |
| 4158 | || !h->def_regular) |
| 4159 | { |
| 4160 | struct bfd_link_hash_entry *bh = NULL; |
| 4161 | |
| 4162 | if (!(_bfd_generic_link_add_one_symbol |
| 4163 | (info, output_bfd, "__stacksize", |
| 4164 | BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE, |
| 4165 | (const char *) NULL, FALSE, |
| 4166 | get_elf_backend_data (output_bfd)->collect, &bh))) |
| 4167 | return FALSE; |
| 4168 | |
| 4169 | h = (struct elf_link_hash_entry *) bh; |
| 4170 | h->def_regular = 1; |
| 4171 | h->type = STT_OBJECT; |
| 4172 | } |
| 4173 | } |
| 4174 | |
| 4175 | return TRUE; |
| 4176 | } |
| 4177 | |
| 4178 | static bfd_boolean |
| 4179 | elf32_bfinfdpic_modify_program_headers (bfd *output_bfd, |
| 4180 | struct bfd_link_info *info) |
| 4181 | { |
| 4182 | struct elf_obj_tdata *tdata = elf_tdata (output_bfd); |
| 4183 | struct elf_segment_map *m; |
| 4184 | Elf_Internal_Phdr *p; |
| 4185 | |
| 4186 | /* objcopy and strip preserve what's already there using |
| 4187 | elf32_bfinfdpic_copy_private_bfd_data (). */ |
| 4188 | if (! info) |
| 4189 | return TRUE; |
| 4190 | |
| 4191 | for (p = tdata->phdr, m = tdata->segment_map; m != NULL; m = m->next, p++) |
| 4192 | if (m->p_type == PT_GNU_STACK) |
| 4193 | break; |
| 4194 | |
| 4195 | if (m) |
| 4196 | { |
| 4197 | struct elf_link_hash_entry *h; |
| 4198 | |
| 4199 | /* Obtain the pointer to the __stacksize symbol. */ |
| 4200 | h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize", |
| 4201 | FALSE, FALSE, FALSE); |
| 4202 | if (h) |
| 4203 | { |
| 4204 | while (h->root.type == bfd_link_hash_indirect |
| 4205 | || h->root.type == bfd_link_hash_warning) |
| 4206 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 4207 | BFD_ASSERT (h->root.type == bfd_link_hash_defined); |
| 4208 | } |
| 4209 | |
| 4210 | /* Set the header p_memsz from the symbol value. We |
| 4211 | intentionally ignore the symbol section. */ |
| 4212 | if (h && h->root.type == bfd_link_hash_defined) |
| 4213 | p->p_memsz = h->root.u.def.value; |
| 4214 | else |
| 4215 | p->p_memsz = DEFAULT_STACK_SIZE; |
| 4216 | |
| 4217 | p->p_align = 8; |
| 4218 | } |
| 4219 | |
| 4220 | return TRUE; |
| 4221 | } |
| 4222 | |
| 4223 | static bfd_boolean |
| 4224 | elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd, |
| 4225 | struct bfd_link_info *info) |
| 4226 | { |
| 4227 | bfd *dynobj; |
| 4228 | asection *sdyn; |
| 4229 | |
| 4230 | dynobj = elf_hash_table (info)->dynobj; |
| 4231 | |
| 4232 | if (bfinfdpic_got_section (info)) |
| 4233 | { |
| 4234 | BFD_ASSERT (bfinfdpic_gotrel_section (info)->size |
| 4235 | == (bfinfdpic_gotrel_section (info)->reloc_count |
| 4236 | * sizeof (Elf32_External_Rel))); |
| 4237 | |
| 4238 | if (bfinfdpic_gotfixup_section (info)) |
| 4239 | { |
| 4240 | struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot; |
| 4241 | bfd_vma got_value = hgot->root.u.def.value |
| 4242 | + hgot->root.u.def.section->output_section->vma |
| 4243 | + hgot->root.u.def.section->output_offset; |
| 4244 | |
| 4245 | _bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info), |
| 4246 | got_value, 0); |
| 4247 | |
| 4248 | if (bfinfdpic_gotfixup_section (info)->size |
| 4249 | != (bfinfdpic_gotfixup_section (info)->reloc_count * 4)) |
| 4250 | { |
| 4251 | (*_bfd_error_handler) |
| 4252 | ("LINKER BUG: .rofixup section size mismatch"); |
| 4253 | return FALSE; |
| 4254 | } |
| 4255 | } |
| 4256 | } |
| 4257 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4258 | { |
| 4259 | BFD_ASSERT (bfinfdpic_pltrel_section (info)->size |
| 4260 | == (bfinfdpic_pltrel_section (info)->reloc_count |
| 4261 | * sizeof (Elf32_External_Rel))); |
| 4262 | } |
| 4263 | |
| 4264 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 4265 | |
| 4266 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4267 | { |
| 4268 | Elf32_External_Dyn * dyncon; |
| 4269 | Elf32_External_Dyn * dynconend; |
| 4270 | |
| 4271 | BFD_ASSERT (sdyn != NULL); |
| 4272 | |
| 4273 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 4274 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 4275 | |
| 4276 | for (; dyncon < dynconend; dyncon++) |
| 4277 | { |
| 4278 | Elf_Internal_Dyn dyn; |
| 4279 | |
| 4280 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 4281 | |
| 4282 | switch (dyn.d_tag) |
| 4283 | { |
| 4284 | default: |
| 4285 | break; |
| 4286 | |
| 4287 | case DT_PLTGOT: |
| 4288 | dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma |
| 4289 | + bfinfdpic_got_section (info)->output_offset |
| 4290 | + bfinfdpic_got_initial_offset (info); |
| 4291 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4292 | break; |
| 4293 | |
| 4294 | case DT_JMPREL: |
| 4295 | dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info) |
| 4296 | ->output_section->vma |
| 4297 | + bfinfdpic_pltrel_section (info)->output_offset; |
| 4298 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4299 | break; |
| 4300 | |
| 4301 | case DT_PLTRELSZ: |
| 4302 | dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size; |
| 4303 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4304 | break; |
| 4305 | } |
| 4306 | } |
| 4307 | } |
| 4308 | |
| 4309 | return TRUE; |
| 4310 | } |
| 4311 | |
| 4312 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 4313 | regular object. */ |
| 4314 | |
| 4315 | static bfd_boolean |
| 4316 | elf32_bfinfdpic_adjust_dynamic_symbol |
| 4317 | (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 4318 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED) |
| 4319 | { |
| 4320 | bfd * dynobj; |
| 4321 | |
| 4322 | dynobj = elf_hash_table (info)->dynobj; |
| 4323 | |
| 4324 | /* Make sure we know what is going on here. */ |
| 4325 | BFD_ASSERT (dynobj != NULL |
| 4326 | && (h->u.weakdef != NULL |
| 4327 | || (h->def_dynamic |
| 4328 | && h->ref_regular |
| 4329 | && !h->def_regular))); |
| 4330 | |
| 4331 | /* If this is a weak symbol, and there is a real definition, the |
| 4332 | processor independent code will have arranged for us to see the |
| 4333 | real definition first, and we can just use the same value. */ |
| 4334 | if (h->u.weakdef != NULL) |
| 4335 | { |
| 4336 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 4337 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 4338 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 4339 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 4340 | } |
| 4341 | |
| 4342 | return TRUE; |
| 4343 | } |
| 4344 | |
| 4345 | /* Perform any actions needed for dynamic symbols. */ |
| 4346 | |
| 4347 | static bfd_boolean |
| 4348 | elf32_bfinfdpic_finish_dynamic_symbol |
| 4349 | (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 4350 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 4351 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED, |
| 4352 | Elf_Internal_Sym *sym ATTRIBUTE_UNUSED) |
| 4353 | { |
| 4354 | return TRUE; |
| 4355 | } |
| 4356 | |
| 4357 | /* Decide whether to attempt to turn absptr or lsda encodings in |
| 4358 | shared libraries into pcrel within the given input section. */ |
| 4359 | |
| 4360 | static bfd_boolean |
| 4361 | bfinfdpic_elf_use_relative_eh_frame |
| 4362 | (bfd *input_bfd ATTRIBUTE_UNUSED, |
| 4363 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 4364 | asection *eh_frame_section ATTRIBUTE_UNUSED) |
| 4365 | { |
| 4366 | /* We can't use PC-relative encodings in FDPIC binaries, in general. */ |
| 4367 | return FALSE; |
| 4368 | } |
| 4369 | |
| 4370 | /* Adjust the contents of an eh_frame_hdr section before they're output. */ |
| 4371 | |
| 4372 | static bfd_byte |
| 4373 | bfinfdpic_elf_encode_eh_address (bfd *abfd, |
| 4374 | struct bfd_link_info *info, |
| 4375 | asection *osec, bfd_vma offset, |
| 4376 | asection *loc_sec, bfd_vma loc_offset, |
| 4377 | bfd_vma *encoded) |
| 4378 | { |
| 4379 | struct elf_link_hash_entry *h; |
| 4380 | |
| 4381 | h = elf_hash_table (info)->hgot; |
| 4382 | BFD_ASSERT (h && h->root.type == bfd_link_hash_defined); |
| 4383 | |
| 4384 | if (! h || (_bfinfdpic_osec_to_segment (abfd, osec) |
| 4385 | == _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section))) |
| 4386 | return _bfd_elf_encode_eh_address (abfd, info, osec, offset, |
| 4387 | loc_sec, loc_offset, encoded); |
| 4388 | |
| 4389 | BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec) |
| 4390 | == (_bfinfdpic_osec_to_segment |
| 4391 | (abfd, h->root.u.def.section->output_section))); |
| 4392 | |
| 4393 | *encoded = osec->vma + offset |
| 4394 | - (h->root.u.def.value |
| 4395 | + h->root.u.def.section->output_section->vma |
| 4396 | + h->root.u.def.section->output_offset); |
| 4397 | |
| 4398 | return DW_EH_PE_datarel | DW_EH_PE_sdata4; |
| 4399 | } |
| 4400 | |
| 4401 | |
| 4402 | |
| 4403 | /* Look through the relocs for a section during the first phase. |
| 4404 | |
| 4405 | Besides handling virtual table relocs for gc, we have to deal with |
| 4406 | all sorts of PIC-related relocations. We describe below the |
| 4407 | general plan on how to handle such relocations, even though we only |
| 4408 | collect information at this point, storing them in hash tables for |
| 4409 | perusal of later passes. |
| 4410 | |
| 4411 | 32 relocations are propagated to the linker output when creating |
| 4412 | position-independent output. LO16 and HI16 relocations are not |
| 4413 | supposed to be encountered in this case. |
| 4414 | |
| 4415 | LABEL16 should always be resolvable by the linker, since it's only |
| 4416 | used by branches. |
| 4417 | |
| 4418 | LABEL24, on the other hand, is used by calls. If it turns out that |
| 4419 | the target of a call is a dynamic symbol, a PLT entry must be |
| 4420 | created for it, which triggers the creation of a private function |
| 4421 | descriptor and, unless lazy binding is disabled, a lazy PLT entry. |
| 4422 | |
| 4423 | GPREL relocations require the referenced symbol to be in the same |
| 4424 | segment as _gp, but this can only be checked later. |
| 4425 | |
| 4426 | All GOT, GOTOFF and FUNCDESC relocations require a .got section to |
| 4427 | exist. LABEL24 might as well, since it may require a PLT entry, |
| 4428 | that will require a got. |
| 4429 | |
| 4430 | Non-FUNCDESC GOT relocations require a GOT entry to be created |
| 4431 | regardless of whether the symbol is dynamic. However, since a |
| 4432 | global symbol that turns out to not be exported may have the same |
| 4433 | address of a non-dynamic symbol, we don't assign GOT entries at |
| 4434 | this point, such that we can share them in this case. A relocation |
| 4435 | for the GOT entry always has to be created, be it to offset a |
| 4436 | private symbol by the section load address, be it to get the symbol |
| 4437 | resolved dynamically. |
| 4438 | |
| 4439 | FUNCDESC GOT relocations require a GOT entry to be created, and |
| 4440 | handled as if a FUNCDESC relocation was applied to the GOT entry in |
| 4441 | an object file. |
| 4442 | |
| 4443 | FUNCDESC relocations referencing a symbol that turns out to NOT be |
| 4444 | dynamic cause a private function descriptor to be created. The |
| 4445 | FUNCDESC relocation then decays to a 32 relocation that points at |
| 4446 | the private descriptor. If the symbol is dynamic, the FUNCDESC |
| 4447 | relocation is propagated to the linker output, such that the |
| 4448 | dynamic linker creates the canonical descriptor, pointing to the |
| 4449 | dynamically-resolved definition of the function. |
| 4450 | |
| 4451 | Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic |
| 4452 | symbols that are assigned to the same segment as the GOT, but we |
| 4453 | can only check this later, after we know the complete set of |
| 4454 | symbols defined and/or exported. |
| 4455 | |
| 4456 | FUNCDESC GOTOFF relocations require a function descriptor to be |
| 4457 | created and, unless lazy binding is disabled or the symbol is not |
| 4458 | dynamic, a lazy PLT entry. Since we can't tell at this point |
| 4459 | whether a symbol is going to be dynamic, we have to decide later |
| 4460 | whether to create a lazy PLT entry or bind the descriptor directly |
| 4461 | to the private function. |
| 4462 | |
| 4463 | FUNCDESC_VALUE relocations are not supposed to be present in object |
| 4464 | files, but they may very well be simply propagated to the linker |
| 4465 | output, since they have no side effect. |
| 4466 | |
| 4467 | |
| 4468 | A function descriptor always requires a FUNCDESC_VALUE relocation. |
| 4469 | Whether it's in .plt.rel or not depends on whether lazy binding is |
| 4470 | enabled and on whether the referenced symbol is dynamic. |
| 4471 | |
| 4472 | The existence of a lazy PLT requires the resolverStub lazy PLT |
| 4473 | entry to be present. |
| 4474 | |
| 4475 | |
| 4476 | As for assignment of GOT, PLT and lazy PLT entries, and private |
| 4477 | descriptors, we might do them all sequentially, but we can do |
| 4478 | better than that. For example, we can place GOT entries and |
| 4479 | private function descriptors referenced using 12-bit operands |
| 4480 | closer to the PIC register value, such that these relocations don't |
| 4481 | overflow. Those that are only referenced with LO16 relocations |
| 4482 | could come next, but we may as well place PLT-required function |
| 4483 | descriptors in the 12-bit range to make them shorter. Symbols |
| 4484 | referenced with LO16/HI16 may come next, but we may place |
| 4485 | additional function descriptors in the 16-bit range if we can |
| 4486 | reliably tell that we've already placed entries that are ever |
| 4487 | referenced with only LO16. PLT entries are therefore generated as |
| 4488 | small as possible, while not introducing relocation overflows in |
| 4489 | GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be |
| 4490 | generated before or after PLT entries, but not intermingled with |
| 4491 | them, such that we can have more lazy PLT entries in range for a |
| 4492 | branch to the resolverStub. The resolverStub should be emitted at |
| 4493 | the most distant location from the first lazy PLT entry such that |
| 4494 | it's still in range for a branch, or closer, if there isn't a need |
| 4495 | for so many lazy PLT entries. Additional lazy PLT entries may be |
| 4496 | emitted after the resolverStub, as long as branches are still in |
| 4497 | range. If the branch goes out of range, longer lazy PLT entries |
| 4498 | are emitted. |
| 4499 | |
| 4500 | We could further optimize PLT and lazy PLT entries by giving them |
| 4501 | priority in assignment to closer-to-gr17 locations depending on the |
| 4502 | number of occurrences of references to them (assuming a function |
| 4503 | that's called more often is more important for performance, so its |
| 4504 | PLT entry should be faster), or taking hints from the compiler. |
| 4505 | Given infinite time and money... :-) */ |
| 4506 | |
| 4507 | static bfd_boolean |
| 4508 | bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info, |
| 4509 | asection *sec, const Elf_Internal_Rela *relocs) |
| 4510 | { |
| 4511 | Elf_Internal_Shdr *symtab_hdr; |
| 4512 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; |
| 4513 | const Elf_Internal_Rela *rel; |
| 4514 | const Elf_Internal_Rela *rel_end; |
| 4515 | bfd *dynobj; |
| 4516 | struct bfinfdpic_relocs_info *picrel; |
| 4517 | |
| 4518 | if (info->relocatable) |
| 4519 | return TRUE; |
| 4520 | |
| 4521 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 4522 | sym_hashes = elf_sym_hashes (abfd); |
| 4523 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym); |
| 4524 | if (!elf_bad_symtab (abfd)) |
| 4525 | sym_hashes_end -= symtab_hdr->sh_info; |
| 4526 | |
| 4527 | dynobj = elf_hash_table (info)->dynobj; |
| 4528 | rel_end = relocs + sec->reloc_count; |
| 4529 | for (rel = relocs; rel < rel_end; rel++) |
| 4530 | { |
| 4531 | struct elf_link_hash_entry *h; |
| 4532 | unsigned long r_symndx; |
| 4533 | |
| 4534 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 4535 | if (r_symndx < symtab_hdr->sh_info) |
| 4536 | h = NULL; |
| 4537 | else |
| 4538 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 4539 | |
| 4540 | switch (ELF32_R_TYPE (rel->r_info)) |
| 4541 | { |
| 4542 | case R_BFIN_GOT17M4: |
| 4543 | case R_BFIN_GOTHI: |
| 4544 | case R_BFIN_GOTLO: |
| 4545 | case R_BFIN_FUNCDESC_GOT17M4: |
| 4546 | case R_BFIN_FUNCDESC_GOTHI: |
| 4547 | case R_BFIN_FUNCDESC_GOTLO: |
| 4548 | case R_BFIN_GOTOFF17M4: |
| 4549 | case R_BFIN_GOTOFFHI: |
| 4550 | case R_BFIN_GOTOFFLO: |
| 4551 | case R_BFIN_FUNCDESC_GOTOFF17M4: |
| 4552 | case R_BFIN_FUNCDESC_GOTOFFHI: |
| 4553 | case R_BFIN_FUNCDESC_GOTOFFLO: |
| 4554 | case R_BFIN_FUNCDESC: |
| 4555 | case R_BFIN_FUNCDESC_VALUE: |
| 4556 | if (! IS_FDPIC (abfd)) |
| 4557 | goto bad_reloc; |
| 4558 | /* Fall through. */ |
| 4559 | case R_pcrel24: |
| 4560 | case R_pcrel24_jump_l: |
| 4561 | case R_byte4_data: |
| 4562 | if (IS_FDPIC (abfd) && ! dynobj) |
| 4563 | { |
| 4564 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 4565 | if (! _bfin_create_got_section (abfd, info)) |
| 4566 | return FALSE; |
| 4567 | } |
| 4568 | if (! IS_FDPIC (abfd)) |
| 4569 | { |
| 4570 | picrel = NULL; |
| 4571 | break; |
| 4572 | } |
| 4573 | if (h != NULL) |
| 4574 | { |
| 4575 | if (h->dynindx == -1) |
| 4576 | switch (ELF_ST_VISIBILITY (h->other)) |
| 4577 | { |
| 4578 | case STV_INTERNAL: |
| 4579 | case STV_HIDDEN: |
| 4580 | break; |
| 4581 | default: |
| 4582 | bfd_elf_link_record_dynamic_symbol (info, h); |
| 4583 | break; |
| 4584 | } |
| 4585 | picrel |
| 4586 | = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info), |
| 4587 | abfd, h, |
| 4588 | rel->r_addend, INSERT); |
| 4589 | } |
| 4590 | else |
| 4591 | picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info |
| 4592 | (info), abfd, r_symndx, |
| 4593 | rel->r_addend, INSERT); |
| 4594 | if (! picrel) |
| 4595 | return FALSE; |
| 4596 | break; |
| 4597 | |
| 4598 | default: |
| 4599 | picrel = NULL; |
| 4600 | break; |
| 4601 | } |
| 4602 | |
| 4603 | switch (ELF32_R_TYPE (rel->r_info)) |
| 4604 | { |
| 4605 | case R_pcrel24: |
| 4606 | case R_pcrel24_jump_l: |
| 4607 | if (IS_FDPIC (abfd)) |
| 4608 | picrel->call = 1; |
| 4609 | break; |
| 4610 | |
| 4611 | case R_BFIN_FUNCDESC_VALUE: |
| 4612 | picrel->relocsfdv++; |
| 4613 | if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC) |
| 4614 | picrel->relocs32--; |
| 4615 | /* Fall through. */ |
| 4616 | |
| 4617 | case R_byte4_data: |
| 4618 | if (! IS_FDPIC (abfd)) |
| 4619 | break; |
| 4620 | |
| 4621 | picrel->sym = 1; |
| 4622 | if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC) |
| 4623 | picrel->relocs32++; |
| 4624 | break; |
| 4625 | |
| 4626 | case R_BFIN_GOT17M4: |
| 4627 | picrel->got17m4 = 1; |
| 4628 | break; |
| 4629 | |
| 4630 | case R_BFIN_GOTHI: |
| 4631 | case R_BFIN_GOTLO: |
| 4632 | picrel->gothilo = 1; |
| 4633 | break; |
| 4634 | |
| 4635 | case R_BFIN_FUNCDESC_GOT17M4: |
| 4636 | picrel->fdgot17m4 = 1; |
| 4637 | break; |
| 4638 | |
| 4639 | case R_BFIN_FUNCDESC_GOTHI: |
| 4640 | case R_BFIN_FUNCDESC_GOTLO: |
| 4641 | picrel->fdgothilo = 1; |
| 4642 | break; |
| 4643 | |
| 4644 | case R_BFIN_GOTOFF17M4: |
| 4645 | case R_BFIN_GOTOFFHI: |
| 4646 | case R_BFIN_GOTOFFLO: |
| 4647 | picrel->gotoff = 1; |
| 4648 | break; |
| 4649 | |
| 4650 | case R_BFIN_FUNCDESC_GOTOFF17M4: |
| 4651 | picrel->fdgoff17m4 = 1; |
| 4652 | break; |
| 4653 | |
| 4654 | case R_BFIN_FUNCDESC_GOTOFFHI: |
| 4655 | case R_BFIN_FUNCDESC_GOTOFFLO: |
| 4656 | picrel->fdgoffhilo = 1; |
| 4657 | break; |
| 4658 | |
| 4659 | case R_BFIN_FUNCDESC: |
| 4660 | picrel->fd = 1; |
| 4661 | picrel->relocsfd++; |
| 4662 | break; |
| 4663 | |
| 4664 | /* This relocation describes the C++ object vtable hierarchy. |
| 4665 | Reconstruct it for later use during GC. */ |
| 4666 | case R_BFIN_GNU_VTINHERIT: |
| 4667 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 4668 | return FALSE; |
| 4669 | break; |
| 4670 | |
| 4671 | /* This relocation describes which C++ vtable entries are actually |
| 4672 | used. Record for later use during GC. */ |
| 4673 | case R_BFIN_GNU_VTENTRY: |
| 4674 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 4675 | return FALSE; |
| 4676 | break; |
| 4677 | |
| 4678 | case R_huimm16: |
| 4679 | case R_luimm16: |
| 4680 | case R_pcrel12_jump_s: |
| 4681 | case R_pcrel10: |
| 4682 | break; |
| 4683 | |
| 4684 | default: |
| 4685 | bad_reloc: |
| 4686 | (*_bfd_error_handler) |
| 4687 | (_("%B: unsupported relocation type %i"), |
| 4688 | abfd, ELF32_R_TYPE (rel->r_info)); |
| 4689 | return FALSE; |
| 4690 | } |
| 4691 | } |
| 4692 | |
| 4693 | return TRUE; |
| 4694 | } |
| 4695 | |
| 4696 | /* Set the right machine number for a Blackfin ELF file. */ |
| 4697 | |
| 4698 | static bfd_boolean |
| 4699 | elf32_bfin_object_p (bfd *abfd) |
| 4700 | { |
| 4701 | bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0); |
| 4702 | return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0) |
| 4703 | == (IS_FDPIC (abfd))); |
| 4704 | } |
| 4705 | |
| 4706 | static bfd_boolean |
| 4707 | elf32_bfin_set_private_flags (bfd * abfd, flagword flags) |
| 4708 | { |
| 4709 | elf_elfheader (abfd)->e_flags = flags; |
| 4710 | elf_flags_init (abfd) = TRUE; |
| 4711 | return TRUE; |
| 4712 | } |
| 4713 | |
| 4714 | /* Copy backend specific data from one object module to another. */ |
| 4715 | |
| 4716 | static bfd_boolean |
| 4717 | bfin_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 4718 | { |
| 4719 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 4720 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 4721 | return TRUE; |
| 4722 | |
| 4723 | BFD_ASSERT (!elf_flags_init (obfd) |
| 4724 | || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); |
| 4725 | |
| 4726 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; |
| 4727 | elf_flags_init (obfd) = TRUE; |
| 4728 | return TRUE; |
| 4729 | } |
| 4730 | |
| 4731 | static bfd_boolean |
| 4732 | elf32_bfinfdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 4733 | { |
| 4734 | unsigned i; |
| 4735 | |
| 4736 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 4737 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 4738 | return TRUE; |
| 4739 | |
| 4740 | if (! bfin_elf_copy_private_bfd_data (ibfd, obfd)) |
| 4741 | return FALSE; |
| 4742 | |
| 4743 | if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr |
| 4744 | || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr) |
| 4745 | return TRUE; |
| 4746 | |
| 4747 | /* Copy the stack size. */ |
| 4748 | for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++) |
| 4749 | if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK) |
| 4750 | { |
| 4751 | Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i]; |
| 4752 | |
| 4753 | for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++) |
| 4754 | if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK) |
| 4755 | { |
| 4756 | memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr)); |
| 4757 | |
| 4758 | /* Rewrite the phdrs, since we're only called after they |
| 4759 | were first written. */ |
| 4760 | if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd) |
| 4761 | ->s->sizeof_ehdr, SEEK_SET) != 0 |
| 4762 | || get_elf_backend_data (obfd)->s |
| 4763 | ->write_out_phdrs (obfd, elf_tdata (obfd)->phdr, |
| 4764 | elf_elfheader (obfd)->e_phnum) != 0) |
| 4765 | return FALSE; |
| 4766 | break; |
| 4767 | } |
| 4768 | |
| 4769 | break; |
| 4770 | } |
| 4771 | |
| 4772 | return TRUE; |
| 4773 | } |
| 4774 | |
| 4775 | |
| 4776 | /* Display the flags field. */ |
| 4777 | static bfd_boolean |
| 4778 | elf32_bfin_print_private_bfd_data (bfd * abfd, PTR ptr) |
| 4779 | { |
| 4780 | FILE *file = (FILE *) ptr; |
| 4781 | flagword flags; |
| 4782 | |
| 4783 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 4784 | |
| 4785 | /* Print normal ELF private data. */ |
| 4786 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 4787 | |
| 4788 | flags = elf_elfheader (abfd)->e_flags; |
| 4789 | |
| 4790 | /* xgettext:c-format */ |
| 4791 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| 4792 | |
| 4793 | if (flags & EF_BFIN_PIC) |
| 4794 | fprintf (file, " -fpic"); |
| 4795 | |
| 4796 | if (flags & EF_BFIN_FDPIC) |
| 4797 | fprintf (file, " -mfdpic"); |
| 4798 | |
| 4799 | fputc ('\n', file); |
| 4800 | |
| 4801 | return TRUE; |
| 4802 | } |
| 4803 | |
| 4804 | /* Merge backend specific data from an object file to the output |
| 4805 | object file when linking. */ |
| 4806 | |
| 4807 | static bfd_boolean |
| 4808 | elf32_bfin_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 4809 | { |
| 4810 | flagword old_flags, old_partial; |
| 4811 | flagword new_flags, new_partial; |
| 4812 | bfd_boolean error = FALSE; |
| 4813 | |
| 4814 | new_flags = elf_elfheader (ibfd)->e_flags; |
| 4815 | old_flags = elf_elfheader (obfd)->e_flags; |
| 4816 | |
| 4817 | if (new_flags & EF_BFIN_FDPIC) |
| 4818 | new_flags &= ~EF_BFIN_PIC; |
| 4819 | |
| 4820 | #ifdef DEBUG |
| 4821 | (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s", |
| 4822 | old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no", |
| 4823 | bfd_get_filename (ibfd)); |
| 4824 | #endif |
| 4825 | |
| 4826 | if (!elf_flags_init (obfd)) /* First call, no flags set. */ |
| 4827 | { |
| 4828 | elf_flags_init (obfd) = TRUE; |
| 4829 | old_flags = new_flags; |
| 4830 | } |
| 4831 | |
| 4832 | else if (new_flags == old_flags) /* Compatible flags are ok. */ |
| 4833 | ; |
| 4834 | |
| 4835 | else /* Possibly incompatible flags. */ |
| 4836 | { |
| 4837 | /* We don't have to do anything if the pic flags are the same, or the new |
| 4838 | module(s) were compiled with -mlibrary-pic. */ |
| 4839 | new_partial = (new_flags & EF_BFIN_PIC_FLAGS); |
| 4840 | old_partial = (old_flags & EF_BFIN_PIC_FLAGS); |
| 4841 | if (new_partial == old_partial) |
| 4842 | ; |
| 4843 | |
| 4844 | /* If we have mixtures of -fpic and -fPIC, or in both bits. */ |
| 4845 | else if (new_partial != 0 && old_partial != 0) |
| 4846 | old_flags |= new_partial; |
| 4847 | |
| 4848 | /* One module was compiled for pic and the other was not, see if we have |
| 4849 | had any relocations that are not pic-safe. */ |
| 4850 | else |
| 4851 | old_flags |= new_partial; |
| 4852 | |
| 4853 | } |
| 4854 | |
| 4855 | /* Update the old flags now with changes made above. */ |
| 4856 | elf_elfheader (obfd)->e_flags = old_flags; |
| 4857 | |
| 4858 | if (((new_flags & EF_BFIN_FDPIC) == 0) |
| 4859 | != (! IS_FDPIC (ibfd))) |
| 4860 | { |
| 4861 | error = TRUE; |
| 4862 | if (IS_FDPIC (obfd)) |
| 4863 | (*_bfd_error_handler) |
| 4864 | (_("%s: cannot link non-fdpic object file into fdpic executable"), |
| 4865 | bfd_get_filename (ibfd)); |
| 4866 | else |
| 4867 | (*_bfd_error_handler) |
| 4868 | (_("%s: cannot link fdpic object file into non-fdpic executable"), |
| 4869 | bfd_get_filename (ibfd)); |
| 4870 | } |
| 4871 | |
| 4872 | if (error) |
| 4873 | bfd_set_error (bfd_error_bad_value); |
| 4874 | |
| 4875 | return !error; |
| 4876 | } |
| 4877 | \f |
| 4878 | /* bfin ELF linker hash entry. */ |
| 4879 | |
| 4880 | struct bfin_link_hash_entry |
| 4881 | { |
| 4882 | struct elf_link_hash_entry root; |
| 4883 | |
| 4884 | /* Number of PC relative relocs copied for this symbol. */ |
| 4885 | struct bfin_pcrel_relocs_copied *pcrel_relocs_copied; |
| 4886 | }; |
| 4887 | |
| 4888 | /* bfin ELF linker hash table. */ |
| 4889 | |
| 4890 | struct bfin_link_hash_table |
| 4891 | { |
| 4892 | struct elf_link_hash_table root; |
| 4893 | |
| 4894 | /* Small local sym to section mapping cache. */ |
| 4895 | struct sym_sec_cache sym_sec; |
| 4896 | }; |
| 4897 | |
| 4898 | #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent)) |
| 4899 | |
| 4900 | static struct bfd_hash_entry * |
| 4901 | bfin_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 4902 | struct bfd_hash_table *table, const char *string) |
| 4903 | { |
| 4904 | struct bfd_hash_entry *ret = entry; |
| 4905 | |
| 4906 | /* Allocate the structure if it has not already been allocated by a |
| 4907 | subclass. */ |
| 4908 | if (ret == NULL) |
| 4909 | ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry)); |
| 4910 | if (ret == NULL) |
| 4911 | return ret; |
| 4912 | |
| 4913 | /* Call the allocation method of the superclass. */ |
| 4914 | ret = _bfd_elf_link_hash_newfunc (ret, table, string); |
| 4915 | if (ret != NULL) |
| 4916 | bfin_hash_entry (ret)->pcrel_relocs_copied = NULL; |
| 4917 | |
| 4918 | return ret; |
| 4919 | } |
| 4920 | |
| 4921 | /* Create an bfin ELF linker hash table. */ |
| 4922 | |
| 4923 | static struct bfd_link_hash_table * |
| 4924 | bfin_link_hash_table_create (bfd * abfd) |
| 4925 | { |
| 4926 | struct bfin_link_hash_table *ret; |
| 4927 | bfd_size_type amt = sizeof (struct bfin_link_hash_table); |
| 4928 | |
| 4929 | ret = bfd_zalloc (abfd, amt); |
| 4930 | if (ret == NULL) |
| 4931 | return NULL; |
| 4932 | |
| 4933 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 4934 | bfin_link_hash_newfunc, |
| 4935 | sizeof (struct elf_link_hash_entry))) |
| 4936 | { |
| 4937 | free (ret); |
| 4938 | return NULL; |
| 4939 | } |
| 4940 | |
| 4941 | ret->sym_sec.abfd = NULL; |
| 4942 | |
| 4943 | return &ret->root.root; |
| 4944 | } |
| 4945 | |
| 4946 | /* The size in bytes of an entry in the procedure linkage table. */ |
| 4947 | |
| 4948 | /* Finish up the dynamic sections. */ |
| 4949 | |
| 4950 | static bfd_boolean |
| 4951 | bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, |
| 4952 | struct bfd_link_info *info) |
| 4953 | { |
| 4954 | bfd *dynobj; |
| 4955 | asection *sdyn; |
| 4956 | |
| 4957 | dynobj = elf_hash_table (info)->dynobj; |
| 4958 | |
| 4959 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 4960 | |
| 4961 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4962 | { |
| 4963 | Elf32_External_Dyn *dyncon, *dynconend; |
| 4964 | |
| 4965 | BFD_ASSERT (sdyn != NULL); |
| 4966 | |
| 4967 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 4968 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 4969 | for (; dyncon < dynconend; dyncon++) |
| 4970 | { |
| 4971 | Elf_Internal_Dyn dyn; |
| 4972 | |
| 4973 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 4974 | |
| 4975 | } |
| 4976 | |
| 4977 | } |
| 4978 | return TRUE; |
| 4979 | } |
| 4980 | |
| 4981 | /* Finish up dynamic symbol handling. We set the contents of various |
| 4982 | dynamic sections here. */ |
| 4983 | |
| 4984 | static bfd_boolean |
| 4985 | bfin_finish_dynamic_symbol (bfd * output_bfd, |
| 4986 | struct bfd_link_info *info, |
| 4987 | struct elf_link_hash_entry *h, |
| 4988 | Elf_Internal_Sym * sym) |
| 4989 | { |
| 4990 | bfd *dynobj; |
| 4991 | |
| 4992 | dynobj = elf_hash_table (info)->dynobj; |
| 4993 | |
| 4994 | if (h->got.offset != (bfd_vma) - 1) |
| 4995 | { |
| 4996 | asection *sgot; |
| 4997 | asection *srela; |
| 4998 | Elf_Internal_Rela rela; |
| 4999 | bfd_byte *loc; |
| 5000 | |
| 5001 | /* This symbol has an entry in the global offset table. |
| 5002 | Set it up. */ |
| 5003 | |
| 5004 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 5005 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 5006 | BFD_ASSERT (sgot != NULL && srela != NULL); |
| 5007 | |
| 5008 | rela.r_offset = (sgot->output_section->vma |
| 5009 | + sgot->output_offset |
| 5010 | + (h->got.offset & ~(bfd_vma) 1)); |
| 5011 | |
| 5012 | /* If this is a -Bsymbolic link, and the symbol is defined |
| 5013 | locally, we just want to emit a RELATIVE reloc. Likewise if |
| 5014 | the symbol was forced to be local because of a version file. |
| 5015 | The entry in the global offset table will already have been |
| 5016 | initialized in the relocate_section function. */ |
| 5017 | if (info->shared |
| 5018 | && (info->symbolic |
| 5019 | || h->dynindx == -1 || h->forced_local) && h->def_regular) |
| 5020 | { |
| 5021 | fprintf(stderr, "*** check this relocation %s\n", __FUNCTION__); |
| 5022 | rela.r_info = ELF32_R_INFO (0, R_pcrel24); |
| 5023 | rela.r_addend = bfd_get_signed_32 (output_bfd, |
| 5024 | (sgot->contents |
| 5025 | + |
| 5026 | (h->got. |
| 5027 | offset & ~(bfd_vma) 1))); |
| 5028 | } |
| 5029 | else |
| 5030 | { |
| 5031 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
| 5032 | sgot->contents + (h->got.offset & ~(bfd_vma) 1)); |
| 5033 | rela.r_info = ELF32_R_INFO (h->dynindx, R_got); |
| 5034 | rela.r_addend = 0; |
| 5035 | } |
| 5036 | |
| 5037 | loc = srela->contents; |
| 5038 | loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); |
| 5039 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 5040 | } |
| 5041 | |
| 5042 | if (h->needs_copy) |
| 5043 | { |
| 5044 | BFD_ASSERT (0); |
| 5045 | } |
| 5046 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 5047 | if (strcmp (h->root.root.string, "__DYNAMIC") == 0 |
| 5048 | || h == elf_hash_table (info)->hgot) |
| 5049 | sym->st_shndx = SHN_ABS; |
| 5050 | |
| 5051 | return TRUE; |
| 5052 | } |
| 5053 | |
| 5054 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 5055 | regular object. The current definition is in some section of the |
| 5056 | dynamic object, but we're not including those sections. We have to |
| 5057 | change the definition to something the rest of the link can |
| 5058 | understand. */ |
| 5059 | |
| 5060 | static bfd_boolean |
| 5061 | bfin_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 5062 | struct elf_link_hash_entry *h) |
| 5063 | { |
| 5064 | bfd *dynobj; |
| 5065 | asection *s; |
| 5066 | unsigned int power_of_two; |
| 5067 | |
| 5068 | dynobj = elf_hash_table (info)->dynobj; |
| 5069 | |
| 5070 | /* Make sure we know what is going on here. */ |
| 5071 | BFD_ASSERT (dynobj != NULL |
| 5072 | && (h->needs_plt |
| 5073 | || h->u.weakdef != NULL |
| 5074 | || (h->def_dynamic && h->ref_regular && !h->def_regular))); |
| 5075 | |
| 5076 | /* If this is a function, put it in the procedure linkage table. We |
| 5077 | will fill in the contents of the procedure linkage table later, |
| 5078 | when we know the address of the .got section. */ |
| 5079 | if (h->type == STT_FUNC || h->needs_plt) |
| 5080 | { |
| 5081 | BFD_ASSERT(0); |
| 5082 | } |
| 5083 | |
| 5084 | /* If this is a weak symbol, and there is a real definition, the |
| 5085 | processor independent code will have arranged for us to see the |
| 5086 | real definition first, and we can just use the same value. */ |
| 5087 | if (h->u.weakdef != NULL) |
| 5088 | { |
| 5089 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 5090 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 5091 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 5092 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 5093 | return TRUE; |
| 5094 | } |
| 5095 | |
| 5096 | /* This is a reference to a symbol defined by a dynamic object which |
| 5097 | is not a function. */ |
| 5098 | |
| 5099 | /* If we are creating a shared library, we must presume that the |
| 5100 | only references to the symbol are via the global offset table. |
| 5101 | For such cases we need not do anything here; the relocations will |
| 5102 | be handled correctly by relocate_section. */ |
| 5103 | if (info->shared) |
| 5104 | return TRUE; |
| 5105 | |
| 5106 | /* We must allocate the symbol in our .dynbss section, which will |
| 5107 | become part of the .bss section of the executable. There will be |
| 5108 | an entry for this symbol in the .dynsym section. The dynamic |
| 5109 | object will contain position independent code, so all references |
| 5110 | from the dynamic object to this symbol will go through the global |
| 5111 | offset table. The dynamic linker will use the .dynsym entry to |
| 5112 | determine the address it must put in the global offset table, so |
| 5113 | both the dynamic object and the regular object will refer to the |
| 5114 | same memory location for the variable. */ |
| 5115 | |
| 5116 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 5117 | BFD_ASSERT (s != NULL); |
| 5118 | |
| 5119 | /* We must generate a R_68K_COPY reloc to tell the dynamic linker to |
| 5120 | copy the initial value out of the dynamic object and into the |
| 5121 | runtime process image. We need to remember the offset into the |
| 5122 | .rela.bss section we are going to use. */ |
| 5123 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 5124 | { |
| 5125 | asection *srel; |
| 5126 | |
| 5127 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| 5128 | BFD_ASSERT (srel != NULL); |
| 5129 | srel->size += sizeof (Elf32_External_Rela); |
| 5130 | h->needs_copy = 1; |
| 5131 | } |
| 5132 | |
| 5133 | /* We need to figure out the alignment required for this symbol. I |
| 5134 | have no idea how ELF linkers handle this. */ |
| 5135 | power_of_two = bfd_log2 (h->size); |
| 5136 | if (power_of_two > 3) |
| 5137 | power_of_two = 3; |
| 5138 | |
| 5139 | /* Apply the required alignment. */ |
| 5140 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
| 5141 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
| 5142 | { |
| 5143 | if (!bfd_set_section_alignment (dynobj, s, power_of_two)) |
| 5144 | return FALSE; |
| 5145 | } |
| 5146 | |
| 5147 | /* Define the symbol as being at this point in the section. */ |
| 5148 | h->root.u.def.section = s; |
| 5149 | h->root.u.def.value = s->size; |
| 5150 | |
| 5151 | /* Increment the section size to make room for the symbol. */ |
| 5152 | s->size += h->size; |
| 5153 | |
| 5154 | return TRUE; |
| 5155 | } |
| 5156 | |
| 5157 | /* The bfin linker needs to keep track of the number of relocs that it |
| 5158 | decides to copy in check_relocs for each symbol. This is so that it |
| 5159 | can discard PC relative relocs if it doesn't need them when linking |
| 5160 | with -Bsymbolic. We store the information in a field extending the |
| 5161 | regular ELF linker hash table. */ |
| 5162 | |
| 5163 | /* This structure keeps track of the number of PC relative relocs we have |
| 5164 | copied for a given symbol. */ |
| 5165 | |
| 5166 | struct bfin_pcrel_relocs_copied |
| 5167 | { |
| 5168 | /* Next section. */ |
| 5169 | struct bfin_pcrel_relocs_copied *next; |
| 5170 | /* A section in dynobj. */ |
| 5171 | asection *section; |
| 5172 | /* Number of relocs copied in this section. */ |
| 5173 | bfd_size_type count; |
| 5174 | }; |
| 5175 | |
| 5176 | /* This function is called via elf_link_hash_traverse if we are |
| 5177 | creating a shared object. In the -Bsymbolic case it discards the |
| 5178 | space allocated to copy PC relative relocs against symbols which |
| 5179 | are defined in regular objects. For the normal shared case, it |
| 5180 | discards space for pc-relative relocs that have become local due to |
| 5181 | symbol visibility changes. We allocated space for them in the |
| 5182 | check_relocs routine, but we won't fill them in in the |
| 5183 | relocate_section routine. |
| 5184 | |
| 5185 | We also check whether any of the remaining relocations apply |
| 5186 | against a readonly section, and set the DF_TEXTREL flag in this |
| 5187 | case. */ |
| 5188 | |
| 5189 | static bfd_boolean |
| 5190 | bfin_discard_copies (struct elf_link_hash_entry *h, PTR inf) |
| 5191 | { |
| 5192 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| 5193 | struct bfin_pcrel_relocs_copied *s; |
| 5194 | |
| 5195 | if (h->root.type == bfd_link_hash_warning) |
| 5196 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5197 | |
| 5198 | if (!h->def_regular || (!info->symbolic && !h->forced_local)) |
| 5199 | { |
| 5200 | if ((info->flags & DF_TEXTREL) == 0) |
| 5201 | { |
| 5202 | /* Look for relocations against read-only sections. */ |
| 5203 | for (s = bfin_hash_entry (h)->pcrel_relocs_copied; |
| 5204 | s != NULL; s = s->next) |
| 5205 | if ((s->section->flags & SEC_READONLY) != 0) |
| 5206 | { |
| 5207 | info->flags |= DF_TEXTREL; |
| 5208 | break; |
| 5209 | } |
| 5210 | } |
| 5211 | |
| 5212 | return TRUE; |
| 5213 | } |
| 5214 | |
| 5215 | for (s = bfin_hash_entry (h)->pcrel_relocs_copied; |
| 5216 | s != NULL; s = s->next) |
| 5217 | s->section->size -= s->count * sizeof (Elf32_External_Rela); |
| 5218 | |
| 5219 | return TRUE; |
| 5220 | } |
| 5221 | |
| 5222 | static bfd_boolean |
| 5223 | bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, |
| 5224 | struct bfd_link_info *info) |
| 5225 | { |
| 5226 | bfd *dynobj; |
| 5227 | asection *s; |
| 5228 | bfd_boolean relocs; |
| 5229 | |
| 5230 | dynobj = elf_hash_table (info)->dynobj; |
| 5231 | BFD_ASSERT (dynobj != NULL); |
| 5232 | |
| 5233 | if (elf_hash_table (info)->dynamic_sections_created) |
| 5234 | { |
| 5235 | /* Set the contents of the .interp section to the interpreter. */ |
| 5236 | if (info->executable) |
| 5237 | { |
| 5238 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 5239 | BFD_ASSERT (s != NULL); |
| 5240 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 5241 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 5242 | } |
| 5243 | } |
| 5244 | else |
| 5245 | { |
| 5246 | /* We may have created entries in the .rela.got section. |
| 5247 | However, if we are not creating the dynamic sections, we will |
| 5248 | not actually use these entries. Reset the size of .rela.got, |
| 5249 | which will cause it to get stripped from the output file |
| 5250 | below. */ |
| 5251 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 5252 | if (s != NULL) |
| 5253 | s->size = 0; |
| 5254 | } |
| 5255 | |
| 5256 | /* If this is a -Bsymbolic shared link, then we need to discard all |
| 5257 | PC relative relocs against symbols defined in a regular object. |
| 5258 | For the normal shared case we discard the PC relative relocs |
| 5259 | against symbols that have become local due to visibility changes. |
| 5260 | We allocated space for them in the check_relocs routine, but we |
| 5261 | will not fill them in in the relocate_section routine. */ |
| 5262 | if (info->shared) |
| 5263 | elf_link_hash_traverse (elf_hash_table (info), |
| 5264 | bfin_discard_copies, (PTR) info); |
| 5265 | |
| 5266 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 5267 | determined the sizes of the various dynamic sections. Allocate |
| 5268 | memory for them. */ |
| 5269 | relocs = FALSE; |
| 5270 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 5271 | { |
| 5272 | const char *name; |
| 5273 | bfd_boolean strip; |
| 5274 | |
| 5275 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 5276 | continue; |
| 5277 | |
| 5278 | /* It's OK to base decisions on the section name, because none |
| 5279 | of the dynobj section names depend upon the input files. */ |
| 5280 | name = bfd_get_section_name (dynobj, s); |
| 5281 | |
| 5282 | strip = FALSE; |
| 5283 | |
| 5284 | if (CONST_STRNEQ (name, ".rela")) |
| 5285 | { |
| 5286 | if (s->size == 0) |
| 5287 | { |
| 5288 | /* If we don't need this section, strip it from the |
| 5289 | output file. This is mostly to handle .rela.bss and |
| 5290 | .rela.plt. We must create both sections in |
| 5291 | create_dynamic_sections, because they must be created |
| 5292 | before the linker maps input sections to output |
| 5293 | sections. The linker does that before |
| 5294 | adjust_dynamic_symbol is called, and it is that |
| 5295 | function which decides whether anything needs to go |
| 5296 | into these sections. */ |
| 5297 | strip = TRUE; |
| 5298 | } |
| 5299 | else |
| 5300 | { |
| 5301 | relocs = TRUE; |
| 5302 | |
| 5303 | /* We use the reloc_count field as a counter if we need |
| 5304 | to copy relocs into the output file. */ |
| 5305 | s->reloc_count = 0; |
| 5306 | } |
| 5307 | } |
| 5308 | else if (! CONST_STRNEQ (name, ".got")) |
| 5309 | { |
| 5310 | /* It's not one of our sections, so don't allocate space. */ |
| 5311 | continue; |
| 5312 | } |
| 5313 | |
| 5314 | if (strip) |
| 5315 | { |
| 5316 | s->flags |= SEC_EXCLUDE; |
| 5317 | continue; |
| 5318 | } |
| 5319 | |
| 5320 | /* Allocate memory for the section contents. */ |
| 5321 | /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. |
| 5322 | Unused entries should be reclaimed before the section's contents |
| 5323 | are written out, but at the moment this does not happen. Thus in |
| 5324 | order to prevent writing out garbage, we initialise the section's |
| 5325 | contents to zero. */ |
| 5326 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| 5327 | if (s->contents == NULL && s->size != 0) |
| 5328 | return FALSE; |
| 5329 | } |
| 5330 | |
| 5331 | if (elf_hash_table (info)->dynamic_sections_created) |
| 5332 | { |
| 5333 | /* Add some entries to the .dynamic section. We fill in the |
| 5334 | values later, in bfin_finish_dynamic_sections, but we |
| 5335 | must add the entries now so that we get the correct size for |
| 5336 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 5337 | dynamic linker and used by the debugger. */ |
| 5338 | #define add_dynamic_entry(TAG, VAL) \ |
| 5339 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 5340 | |
| 5341 | if (!info->shared) |
| 5342 | { |
| 5343 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 5344 | return FALSE; |
| 5345 | } |
| 5346 | |
| 5347 | |
| 5348 | if (relocs) |
| 5349 | { |
| 5350 | if (!add_dynamic_entry (DT_RELA, 0) |
| 5351 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 5352 | || !add_dynamic_entry (DT_RELAENT, |
| 5353 | sizeof (Elf32_External_Rela))) |
| 5354 | return FALSE; |
| 5355 | } |
| 5356 | |
| 5357 | if ((info->flags & DF_TEXTREL) != 0) |
| 5358 | { |
| 5359 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 5360 | return FALSE; |
| 5361 | } |
| 5362 | } |
| 5363 | #undef add_dynamic_entry |
| 5364 | |
| 5365 | return TRUE; |
| 5366 | } |
| 5367 | \f |
| 5368 | /* Given a .data section and a .emreloc in-memory section, store |
| 5369 | relocation information into the .emreloc section which can be |
| 5370 | used at runtime to relocate the section. This is called by the |
| 5371 | linker when the --embedded-relocs switch is used. This is called |
| 5372 | after the add_symbols entry point has been called for all the |
| 5373 | objects, and before the final_link entry point is called. */ |
| 5374 | |
| 5375 | bfd_boolean bfd_bfin_elf32_create_embedded_relocs |
| 5376 | PARAMS ((bfd *, struct bfd_link_info *, asection *, asection *, char **)); |
| 5377 | |
| 5378 | bfd_boolean |
| 5379 | bfd_bfin_elf32_create_embedded_relocs ( |
| 5380 | bfd *abfd, |
| 5381 | struct bfd_link_info *info, |
| 5382 | asection *datasec, |
| 5383 | asection *relsec, |
| 5384 | char **errmsg) |
| 5385 | { |
| 5386 | Elf_Internal_Shdr *symtab_hdr; |
| 5387 | Elf_Internal_Sym *isymbuf = NULL; |
| 5388 | Elf_Internal_Rela *internal_relocs = NULL; |
| 5389 | Elf_Internal_Rela *irel, *irelend; |
| 5390 | bfd_byte *p; |
| 5391 | bfd_size_type amt; |
| 5392 | |
| 5393 | BFD_ASSERT (! info->relocatable); |
| 5394 | |
| 5395 | *errmsg = NULL; |
| 5396 | |
| 5397 | if (datasec->reloc_count == 0) |
| 5398 | return TRUE; |
| 5399 | |
| 5400 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 5401 | |
| 5402 | /* Get a copy of the native relocations. */ |
| 5403 | internal_relocs = (_bfd_elf_link_read_relocs |
| 5404 | (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
| 5405 | info->keep_memory)); |
| 5406 | if (internal_relocs == NULL) |
| 5407 | goto error_return; |
| 5408 | |
| 5409 | amt = (bfd_size_type) datasec->reloc_count * 12; |
| 5410 | relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt); |
| 5411 | if (relsec->contents == NULL) |
| 5412 | goto error_return; |
| 5413 | |
| 5414 | p = relsec->contents; |
| 5415 | |
| 5416 | irelend = internal_relocs + datasec->reloc_count; |
| 5417 | for (irel = internal_relocs; irel < irelend; irel++, p += 12) |
| 5418 | { |
| 5419 | asection *targetsec; |
| 5420 | |
| 5421 | /* We are going to write a four byte longword into the runtime |
| 5422 | reloc section. The longword will be the address in the data |
| 5423 | section which must be relocated. It is followed by the name |
| 5424 | of the target section NUL-padded or truncated to 8 |
| 5425 | characters. */ |
| 5426 | |
| 5427 | /* We can only relocate absolute longword relocs at run time. */ |
| 5428 | if (ELF32_R_TYPE (irel->r_info) != (int) R_byte4_data) |
| 5429 | { |
| 5430 | *errmsg = _("unsupported reloc type"); |
| 5431 | bfd_set_error (bfd_error_bad_value); |
| 5432 | goto error_return; |
| 5433 | } |
| 5434 | |
| 5435 | /* Get the target section referred to by the reloc. */ |
| 5436 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 5437 | { |
| 5438 | /* A local symbol. */ |
| 5439 | Elf_Internal_Sym *isym; |
| 5440 | |
| 5441 | /* Read this BFD's local symbols if we haven't done so already. */ |
| 5442 | if (isymbuf == NULL) |
| 5443 | { |
| 5444 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 5445 | if (isymbuf == NULL) |
| 5446 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 5447 | symtab_hdr->sh_info, 0, |
| 5448 | NULL, NULL, NULL); |
| 5449 | if (isymbuf == NULL) |
| 5450 | goto error_return; |
| 5451 | } |
| 5452 | |
| 5453 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 5454 | targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 5455 | } |
| 5456 | else |
| 5457 | { |
| 5458 | unsigned long indx; |
| 5459 | struct elf_link_hash_entry *h; |
| 5460 | |
| 5461 | /* An external symbol. */ |
| 5462 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 5463 | h = elf_sym_hashes (abfd)[indx]; |
| 5464 | BFD_ASSERT (h != NULL); |
| 5465 | if (h->root.type == bfd_link_hash_defined |
| 5466 | || h->root.type == bfd_link_hash_defweak) |
| 5467 | targetsec = h->root.u.def.section; |
| 5468 | else |
| 5469 | targetsec = NULL; |
| 5470 | } |
| 5471 | |
| 5472 | bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p); |
| 5473 | memset (p + 4, 0, 8); |
| 5474 | if (targetsec != NULL) |
| 5475 | strncpy ((char *) p + 4, targetsec->output_section->name, 8); |
| 5476 | } |
| 5477 | |
| 5478 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 5479 | free (isymbuf); |
| 5480 | if (internal_relocs != NULL |
| 5481 | && elf_section_data (datasec)->relocs != internal_relocs) |
| 5482 | free (internal_relocs); |
| 5483 | return TRUE; |
| 5484 | |
| 5485 | error_return: |
| 5486 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 5487 | free (isymbuf); |
| 5488 | if (internal_relocs != NULL |
| 5489 | && elf_section_data (datasec)->relocs != internal_relocs) |
| 5490 | free (internal_relocs); |
| 5491 | return FALSE; |
| 5492 | } |
| 5493 | \f |
| 5494 | #define TARGET_LITTLE_SYM bfd_elf32_bfin_vec |
| 5495 | #define TARGET_LITTLE_NAME "elf32-bfin" |
| 5496 | #define ELF_ARCH bfd_arch_bfin |
| 5497 | #define ELF_MACHINE_CODE EM_BLACKFIN |
| 5498 | #define ELF_MAXPAGESIZE 0x1000 |
| 5499 | #define elf_symbol_leading_char '_' |
| 5500 | |
| 5501 | #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup |
| 5502 | #define bfd_elf32_bfd_reloc_name_lookup \ |
| 5503 | bfin_bfd_reloc_name_lookup |
| 5504 | #define elf_info_to_howto bfin_info_to_howto |
| 5505 | #define elf_info_to_howto_rel 0 |
| 5506 | #define elf_backend_object_p elf32_bfin_object_p |
| 5507 | |
| 5508 | #define bfd_elf32_bfd_is_local_label_name \ |
| 5509 | bfin_is_local_label_name |
| 5510 | #define bfin_hash_table(p) \ |
| 5511 | ((struct bfin_link_hash_table *) (p)->hash) |
| 5512 | |
| 5513 | |
| 5514 | |
| 5515 | #define elf_backend_create_dynamic_sections \ |
| 5516 | _bfd_elf_create_dynamic_sections |
| 5517 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 5518 | bfin_link_hash_table_create |
| 5519 | #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link |
| 5520 | |
| 5521 | #define elf_backend_check_relocs bfin_check_relocs |
| 5522 | #define elf_backend_adjust_dynamic_symbol \ |
| 5523 | bfin_adjust_dynamic_symbol |
| 5524 | #define elf_backend_size_dynamic_sections \ |
| 5525 | bfin_size_dynamic_sections |
| 5526 | #define elf_backend_relocate_section bfin_relocate_section |
| 5527 | #define elf_backend_finish_dynamic_symbol \ |
| 5528 | bfin_finish_dynamic_symbol |
| 5529 | #define elf_backend_finish_dynamic_sections \ |
| 5530 | bfin_finish_dynamic_sections |
| 5531 | #define elf_backend_gc_mark_hook bfin_gc_mark_hook |
| 5532 | #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook |
| 5533 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
| 5534 | elf32_bfin_merge_private_bfd_data |
| 5535 | #define bfd_elf32_bfd_set_private_flags \ |
| 5536 | elf32_bfin_set_private_flags |
| 5537 | #define bfd_elf32_bfd_print_private_bfd_data \ |
| 5538 | elf32_bfin_print_private_bfd_data |
| 5539 | #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class |
| 5540 | #define elf_backend_can_gc_sections 1 |
| 5541 | #define elf_backend_can_refcount 1 |
| 5542 | #define elf_backend_want_got_plt 0 |
| 5543 | #define elf_backend_plt_readonly 1 |
| 5544 | #define elf_backend_want_plt_sym 0 |
| 5545 | #define elf_backend_got_header_size 12 |
| 5546 | #define elf_backend_rela_normal 1 |
| 5547 | |
| 5548 | #include "elf32-target.h" |
| 5549 | |
| 5550 | #undef TARGET_LITTLE_SYM |
| 5551 | #define TARGET_LITTLE_SYM bfd_elf32_bfinfdpic_vec |
| 5552 | #undef TARGET_LITTLE_NAME |
| 5553 | #define TARGET_LITTLE_NAME "elf32-bfinfdpic" |
| 5554 | #undef elf32_bed |
| 5555 | #define elf32_bed elf32_bfinfdpic_bed |
| 5556 | |
| 5557 | #undef elf_backend_gc_sweep_hook |
| 5558 | |
| 5559 | #undef elf_backend_got_header_size |
| 5560 | #define elf_backend_got_header_size 0 |
| 5561 | |
| 5562 | #undef elf_backend_relocate_section |
| 5563 | #define elf_backend_relocate_section bfinfdpic_relocate_section |
| 5564 | #undef elf_backend_check_relocs |
| 5565 | #define elf_backend_check_relocs bfinfdpic_check_relocs |
| 5566 | |
| 5567 | #undef bfd_elf32_bfd_link_hash_table_create |
| 5568 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 5569 | bfinfdpic_elf_link_hash_table_create |
| 5570 | #undef elf_backend_always_size_sections |
| 5571 | #define elf_backend_always_size_sections \ |
| 5572 | elf32_bfinfdpic_always_size_sections |
| 5573 | #undef elf_backend_modify_program_headers |
| 5574 | #define elf_backend_modify_program_headers \ |
| 5575 | elf32_bfinfdpic_modify_program_headers |
| 5576 | #undef bfd_elf32_bfd_copy_private_bfd_data |
| 5577 | #define bfd_elf32_bfd_copy_private_bfd_data \ |
| 5578 | elf32_bfinfdpic_copy_private_bfd_data |
| 5579 | |
| 5580 | #undef elf_backend_create_dynamic_sections |
| 5581 | #define elf_backend_create_dynamic_sections \ |
| 5582 | elf32_bfinfdpic_create_dynamic_sections |
| 5583 | #undef elf_backend_adjust_dynamic_symbol |
| 5584 | #define elf_backend_adjust_dynamic_symbol \ |
| 5585 | elf32_bfinfdpic_adjust_dynamic_symbol |
| 5586 | #undef elf_backend_size_dynamic_sections |
| 5587 | #define elf_backend_size_dynamic_sections \ |
| 5588 | elf32_bfinfdpic_size_dynamic_sections |
| 5589 | #undef elf_backend_finish_dynamic_symbol |
| 5590 | #define elf_backend_finish_dynamic_symbol \ |
| 5591 | elf32_bfinfdpic_finish_dynamic_symbol |
| 5592 | #undef elf_backend_finish_dynamic_sections |
| 5593 | #define elf_backend_finish_dynamic_sections \ |
| 5594 | elf32_bfinfdpic_finish_dynamic_sections |
| 5595 | |
| 5596 | #undef elf_backend_can_make_relative_eh_frame |
| 5597 | #define elf_backend_can_make_relative_eh_frame \ |
| 5598 | bfinfdpic_elf_use_relative_eh_frame |
| 5599 | #undef elf_backend_can_make_lsda_relative_eh_frame |
| 5600 | #define elf_backend_can_make_lsda_relative_eh_frame \ |
| 5601 | bfinfdpic_elf_use_relative_eh_frame |
| 5602 | #undef elf_backend_encode_eh_address |
| 5603 | #define elf_backend_encode_eh_address \ |
| 5604 | bfinfdpic_elf_encode_eh_address |
| 5605 | |
| 5606 | #undef elf_backend_may_use_rel_p |
| 5607 | #define elf_backend_may_use_rel_p 1 |
| 5608 | #undef elf_backend_may_use_rela_p |
| 5609 | #define elf_backend_may_use_rela_p 1 |
| 5610 | /* We use REL for dynamic relocations only. */ |
| 5611 | #undef elf_backend_default_use_rela_p |
| 5612 | #define elf_backend_default_use_rela_p 1 |
| 5613 | |
| 5614 | #undef elf_backend_omit_section_dynsym |
| 5615 | #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym |
| 5616 | |
| 5617 | #include "elf32-target.h" |