| 1 | /* ADI Blackfin BFD support for 32-bit ELF. |
| 2 | Copyright (C) 2005-2014 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 3 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, |
| 19 | MA 02110-1301, USA. */ |
| 20 | |
| 21 | #include "sysdep.h" |
| 22 | #include "bfd.h" |
| 23 | #include "libbfd.h" |
| 24 | #include "elf-bfd.h" |
| 25 | #include "elf/bfin.h" |
| 26 | #include "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 | void * 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 | void * 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 | (*_bfd_error_handler) (_("relocation should be even number")); |
| 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 | void * 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 | void * 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 | void * 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 | (*_bfd_error_handler) (_("relocation should be even number")); |
| 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_BFIN_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_BFIN_UNUSED0", /* name. */ |
| 433 | FALSE, /* partial_inplace. */ |
| 434 | 0, /* src_mask. */ |
| 435 | 0, /* dst_mask. */ |
| 436 | FALSE), /* pcrel_offset. */ |
| 437 | |
| 438 | HOWTO (R_BFIN_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_BFIN_PCREL5M2", /* name. */ |
| 447 | FALSE, /* partial_inplace. */ |
| 448 | 0, /* src_mask. */ |
| 449 | 0x0000000F, /* dst_mask. */ |
| 450 | FALSE), /* pcrel_offset. */ |
| 451 | |
| 452 | HOWTO (R_BFIN_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_BFIN_UNUSED1", /* name. */ |
| 461 | FALSE, /* partial_inplace. */ |
| 462 | 0, /* src_mask. */ |
| 463 | 0, /* dst_mask. */ |
| 464 | FALSE), /* pcrel_offset. */ |
| 465 | |
| 466 | HOWTO (R_BFIN_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_BFIN_PCREL10", /* name. */ |
| 475 | FALSE, /* partial_inplace. */ |
| 476 | 0, /* src_mask. */ |
| 477 | 0x000003FF, /* dst_mask. */ |
| 478 | TRUE), /* pcrel_offset. */ |
| 479 | |
| 480 | HOWTO (R_BFIN_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_BFIN_PCREL12_JUMP", /* name. */ |
| 493 | FALSE, /* partial_inplace. */ |
| 494 | 0, /* src_mask. */ |
| 495 | 0x0FFF, /* dst_mask. */ |
| 496 | TRUE), /* pcrel_offset. */ |
| 497 | |
| 498 | HOWTO (R_BFIN_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_BFIN_RIMM16", /* name. */ |
| 507 | FALSE, /* partial_inplace. */ |
| 508 | 0, /* src_mask. */ |
| 509 | 0x0000FFFF, /* dst_mask. */ |
| 510 | TRUE), /* pcrel_offset. */ |
| 511 | |
| 512 | HOWTO (R_BFIN_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_BFIN_LUIMM16", /* name. */ |
| 521 | FALSE, /* partial_inplace. */ |
| 522 | 0, /* src_mask. */ |
| 523 | 0x0000FFFF, /* dst_mask. */ |
| 524 | TRUE), /* pcrel_offset. */ |
| 525 | |
| 526 | HOWTO (R_BFIN_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_BFIN_HUIMM16", /* name. */ |
| 535 | FALSE, /* partial_inplace. */ |
| 536 | 0, /* src_mask. */ |
| 537 | 0x0000FFFF, /* dst_mask. */ |
| 538 | TRUE), /* pcrel_offset. */ |
| 539 | |
| 540 | HOWTO (R_BFIN_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_BFIN_PCREL12_JUMP_S", /* name. */ |
| 549 | FALSE, /* partial_inplace. */ |
| 550 | 0, /* src_mask. */ |
| 551 | 0x00000FFF, /* dst_mask. */ |
| 552 | TRUE), /* pcrel_offset. */ |
| 553 | |
| 554 | HOWTO (R_BFIN_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_BFIN_PCREL24_JUMP_X", /* name. */ |
| 563 | FALSE, /* partial_inplace. */ |
| 564 | 0, /* src_mask. */ |
| 565 | 0x00FFFFFF, /* dst_mask. */ |
| 566 | TRUE), /* pcrel_offset. */ |
| 567 | |
| 568 | HOWTO (R_BFIN_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_BFIN_PCREL24", /* name. */ |
| 577 | FALSE, /* partial_inplace. */ |
| 578 | 0, /* src_mask. */ |
| 579 | 0x00FFFFFF, /* dst_mask. */ |
| 580 | TRUE), /* pcrel_offset. */ |
| 581 | |
| 582 | HOWTO (R_BFIN_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_BFIN_UNUSEDB", /* name. */ |
| 591 | FALSE, /* partial_inplace. */ |
| 592 | 0, /* src_mask. */ |
| 593 | 0, /* dst_mask. */ |
| 594 | FALSE), /* pcrel_offset. */ |
| 595 | |
| 596 | HOWTO (R_BFIN_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_BFIN_UNUSEDC", /* name. */ |
| 605 | FALSE, /* partial_inplace. */ |
| 606 | 0, /* src_mask. */ |
| 607 | 0, /* dst_mask. */ |
| 608 | FALSE), /* pcrel_offset. */ |
| 609 | |
| 610 | HOWTO (R_BFIN_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_BFIN_PCREL24_JUMP_L", /* name. */ |
| 619 | FALSE, /* partial_inplace. */ |
| 620 | 0, /* src_mask. */ |
| 621 | 0x00FFFFFF, /* dst_mask. */ |
| 622 | TRUE), /* pcrel_offset. */ |
| 623 | |
| 624 | HOWTO (R_BFIN_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_BFIN_PCREL24_CALL_X", /* name. */ |
| 633 | FALSE, /* partial_inplace. */ |
| 634 | 0, /* src_mask. */ |
| 635 | 0x00FFFFFF, /* dst_mask. */ |
| 636 | TRUE), /* pcrel_offset. */ |
| 637 | |
| 638 | HOWTO (R_BFIN_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_BFIN_VAR_EQ_SYMB", /* name. */ |
| 647 | FALSE, /* partial_inplace. */ |
| 648 | 0, /* src_mask. */ |
| 649 | 0, /* dst_mask. */ |
| 650 | FALSE), /* pcrel_offset. */ |
| 651 | |
| 652 | HOWTO (R_BFIN_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_BFIN_BYTE_DATA", /* name. */ |
| 661 | FALSE, /* partial_inplace. */ |
| 662 | 0, /* src_mask. */ |
| 663 | 0xFF, /* dst_mask. */ |
| 664 | TRUE), /* pcrel_offset. */ |
| 665 | |
| 666 | HOWTO (R_BFIN_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_BFIN_BYTE2_DATA", /* name. */ |
| 675 | FALSE, /* partial_inplace. */ |
| 676 | 0, /* src_mask. */ |
| 677 | 0xFFFF, /* dst_mask. */ |
| 678 | TRUE), /* pcrel_offset. */ |
| 679 | |
| 680 | HOWTO (R_BFIN_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_BFIN_BYTE4_DATA", /* name. */ |
| 689 | FALSE, /* partial_inplace. */ |
| 690 | 0, /* src_mask. */ |
| 691 | 0xFFFFFFFF, /* dst_mask. */ |
| 692 | TRUE), /* pcrel_offset. */ |
| 693 | |
| 694 | HOWTO (R_BFIN_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_BFIN_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_GOT17M4", /* 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_BFIN_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_BFIN_PLTPC", /* name. */ |
| 943 | FALSE, /* partial_inplace. */ |
| 944 | 0xffff, /* src_mask. */ |
| 945 | 0xffff, /* dst_mask. */ |
| 946 | FALSE), /* pcrel_offset. */ |
| 947 | |
| 948 | HOWTO (R_BFIN_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_BFIN_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_BFIN_UNUSED0 }, |
| 1002 | { BFD_RELOC_BFIN_5_PCREL, R_BFIN_PCREL5M2 }, |
| 1003 | { BFD_RELOC_NONE, R_BFIN_UNUSED1 }, |
| 1004 | { BFD_RELOC_BFIN_10_PCREL, R_BFIN_PCREL10 }, |
| 1005 | { BFD_RELOC_BFIN_12_PCREL_JUMP, R_BFIN_PCREL12_JUMP }, |
| 1006 | { BFD_RELOC_BFIN_16_IMM, R_BFIN_RIMM16 }, |
| 1007 | { BFD_RELOC_BFIN_16_LOW, R_BFIN_LUIMM16 }, |
| 1008 | { BFD_RELOC_BFIN_16_HIGH, R_BFIN_HUIMM16 }, |
| 1009 | { BFD_RELOC_BFIN_12_PCREL_JUMP_S, R_BFIN_PCREL12_JUMP_S }, |
| 1010 | { BFD_RELOC_24_PCREL, R_BFIN_PCREL24 }, |
| 1011 | { BFD_RELOC_24_PCREL, R_BFIN_PCREL24 }, |
| 1012 | { BFD_RELOC_BFIN_24_PCREL_JUMP_L, R_BFIN_PCREL24_JUMP_L }, |
| 1013 | { BFD_RELOC_NONE, R_BFIN_UNUSEDB }, |
| 1014 | { BFD_RELOC_NONE, R_BFIN_UNUSEDC }, |
| 1015 | { BFD_RELOC_BFIN_24_PCREL_CALL_X, R_BFIN_PCREL24_CALL_X }, |
| 1016 | { BFD_RELOC_8, R_BFIN_BYTE_DATA }, |
| 1017 | { BFD_RELOC_16, R_BFIN_BYTE2_DATA }, |
| 1018 | { BFD_RELOC_32, R_BFIN_BYTE4_DATA }, |
| 1019 | { BFD_RELOC_BFIN_11_PCREL, R_BFIN_PCREL11 }, |
| 1020 | { BFD_RELOC_BFIN_GOT, R_BFIN_GOT }, |
| 1021 | { BFD_RELOC_BFIN_PLTPC, R_BFIN_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 | /* Set by ld emulation if --code-in-l1. */ |
| 1123 | bfd_boolean elf32_bfin_code_in_l1 = 0; |
| 1124 | |
| 1125 | /* Set by ld emulation if --data-in-l1. */ |
| 1126 | bfd_boolean elf32_bfin_data_in_l1 = 0; |
| 1127 | |
| 1128 | static void |
| 1129 | elf32_bfin_final_write_processing (bfd *abfd, |
| 1130 | bfd_boolean linker ATTRIBUTE_UNUSED) |
| 1131 | { |
| 1132 | if (elf32_bfin_code_in_l1) |
| 1133 | elf_elfheader (abfd)->e_flags |= EF_BFIN_CODE_IN_L1; |
| 1134 | if (elf32_bfin_data_in_l1) |
| 1135 | elf_elfheader (abfd)->e_flags |= EF_BFIN_DATA_IN_L1; |
| 1136 | } |
| 1137 | |
| 1138 | /* Return TRUE if the name is a local label. |
| 1139 | bfin local labels begin with L$. */ |
| 1140 | static bfd_boolean |
| 1141 | bfin_is_local_label_name (bfd *abfd, const char *label) |
| 1142 | { |
| 1143 | if (label[0] == 'L' && label[1] == '$' ) |
| 1144 | return TRUE; |
| 1145 | |
| 1146 | return _bfd_elf_is_local_label_name (abfd, label); |
| 1147 | } |
| 1148 | \f |
| 1149 | /* Look through the relocs for a section during the first phase, and |
| 1150 | allocate space in the global offset table or procedure linkage |
| 1151 | table. */ |
| 1152 | |
| 1153 | static bfd_boolean |
| 1154 | bfin_check_relocs (bfd * abfd, |
| 1155 | struct bfd_link_info *info, |
| 1156 | asection *sec, |
| 1157 | const Elf_Internal_Rela *relocs) |
| 1158 | { |
| 1159 | bfd *dynobj; |
| 1160 | Elf_Internal_Shdr *symtab_hdr; |
| 1161 | struct elf_link_hash_entry **sym_hashes; |
| 1162 | bfd_signed_vma *local_got_refcounts; |
| 1163 | const Elf_Internal_Rela *rel; |
| 1164 | const Elf_Internal_Rela *rel_end; |
| 1165 | asection *sgot; |
| 1166 | asection *srelgot; |
| 1167 | |
| 1168 | if (info->relocatable) |
| 1169 | return TRUE; |
| 1170 | |
| 1171 | dynobj = elf_hash_table (info)->dynobj; |
| 1172 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1173 | sym_hashes = elf_sym_hashes (abfd); |
| 1174 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 1175 | |
| 1176 | sgot = NULL; |
| 1177 | srelgot = NULL; |
| 1178 | |
| 1179 | rel_end = relocs + sec->reloc_count; |
| 1180 | for (rel = relocs; rel < rel_end; rel++) |
| 1181 | { |
| 1182 | unsigned long r_symndx; |
| 1183 | struct elf_link_hash_entry *h; |
| 1184 | |
| 1185 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1186 | if (r_symndx < symtab_hdr->sh_info) |
| 1187 | h = NULL; |
| 1188 | else |
| 1189 | { |
| 1190 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1191 | |
| 1192 | /* PR15323, ref flags aren't set for references in the same |
| 1193 | object. */ |
| 1194 | h->root.non_ir_ref = 1; |
| 1195 | } |
| 1196 | |
| 1197 | switch (ELF32_R_TYPE (rel->r_info)) |
| 1198 | { |
| 1199 | /* This relocation describes the C++ object vtable hierarchy. |
| 1200 | Reconstruct it for later use during GC. */ |
| 1201 | case R_BFIN_GNU_VTINHERIT: |
| 1202 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 1203 | return FALSE; |
| 1204 | break; |
| 1205 | |
| 1206 | /* This relocation describes which C++ vtable entries |
| 1207 | are actually used. Record for later use during GC. */ |
| 1208 | case R_BFIN_GNU_VTENTRY: |
| 1209 | BFD_ASSERT (h != NULL); |
| 1210 | if (h != NULL |
| 1211 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 1212 | return FALSE; |
| 1213 | break; |
| 1214 | |
| 1215 | case R_BFIN_GOT: |
| 1216 | if (h != NULL |
| 1217 | && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0) |
| 1218 | break; |
| 1219 | /* Fall through. */ |
| 1220 | |
| 1221 | if (dynobj == NULL) |
| 1222 | { |
| 1223 | /* Create the .got section. */ |
| 1224 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 1225 | if (!_bfd_elf_create_got_section (dynobj, info)) |
| 1226 | return FALSE; |
| 1227 | } |
| 1228 | |
| 1229 | if (sgot == NULL) |
| 1230 | { |
| 1231 | sgot = bfd_get_linker_section (dynobj, ".got"); |
| 1232 | BFD_ASSERT (sgot != NULL); |
| 1233 | } |
| 1234 | |
| 1235 | if (srelgot == NULL && (h != NULL || info->shared)) |
| 1236 | { |
| 1237 | srelgot = bfd_get_linker_section (dynobj, ".rela.got"); |
| 1238 | if (srelgot == NULL) |
| 1239 | { |
| 1240 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| 1241 | | SEC_IN_MEMORY | SEC_LINKER_CREATED |
| 1242 | | SEC_READONLY); |
| 1243 | srelgot = bfd_make_section_anyway_with_flags (dynobj, |
| 1244 | ".rela.got", |
| 1245 | flags); |
| 1246 | if (srelgot == NULL |
| 1247 | || !bfd_set_section_alignment (dynobj, srelgot, 2)) |
| 1248 | return FALSE; |
| 1249 | } |
| 1250 | } |
| 1251 | |
| 1252 | if (h != NULL) |
| 1253 | { |
| 1254 | if (h->got.refcount == 0) |
| 1255 | { |
| 1256 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 1257 | if (h->dynindx == -1 && !h->forced_local) |
| 1258 | { |
| 1259 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1260 | return FALSE; |
| 1261 | } |
| 1262 | |
| 1263 | /* Allocate space in the .got section. */ |
| 1264 | sgot->size += 4; |
| 1265 | /* Allocate relocation space. */ |
| 1266 | srelgot->size += sizeof (Elf32_External_Rela); |
| 1267 | } |
| 1268 | h->got.refcount++; |
| 1269 | } |
| 1270 | else |
| 1271 | { |
| 1272 | /* This is a global offset table entry for a local symbol. */ |
| 1273 | if (local_got_refcounts == NULL) |
| 1274 | { |
| 1275 | bfd_size_type size; |
| 1276 | |
| 1277 | size = symtab_hdr->sh_info; |
| 1278 | size *= sizeof (bfd_signed_vma); |
| 1279 | local_got_refcounts = ((bfd_signed_vma *) |
| 1280 | bfd_zalloc (abfd, size)); |
| 1281 | if (local_got_refcounts == NULL) |
| 1282 | return FALSE; |
| 1283 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 1284 | } |
| 1285 | if (local_got_refcounts[r_symndx] == 0) |
| 1286 | { |
| 1287 | sgot->size += 4; |
| 1288 | if (info->shared) |
| 1289 | { |
| 1290 | /* If we are generating a shared object, we need to |
| 1291 | output a R_68K_RELATIVE reloc so that the dynamic |
| 1292 | linker can adjust this GOT entry. */ |
| 1293 | srelgot->size += sizeof (Elf32_External_Rela); |
| 1294 | } |
| 1295 | } |
| 1296 | local_got_refcounts[r_symndx]++; |
| 1297 | } |
| 1298 | break; |
| 1299 | |
| 1300 | default: |
| 1301 | break; |
| 1302 | } |
| 1303 | } |
| 1304 | |
| 1305 | return TRUE; |
| 1306 | } |
| 1307 | |
| 1308 | static enum elf_reloc_type_class |
| 1309 | elf32_bfin_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 1310 | const asection *rel_sec ATTRIBUTE_UNUSED, |
| 1311 | const Elf_Internal_Rela * rela) |
| 1312 | { |
| 1313 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 1314 | { |
| 1315 | default: |
| 1316 | return reloc_class_normal; |
| 1317 | } |
| 1318 | } |
| 1319 | \f |
| 1320 | static bfd_reloc_status_type |
| 1321 | bfin_final_link_relocate (Elf_Internal_Rela *rel, reloc_howto_type *howto, |
| 1322 | bfd *input_bfd, asection *input_section, |
| 1323 | bfd_byte *contents, bfd_vma address, |
| 1324 | bfd_vma value, bfd_vma addend) |
| 1325 | { |
| 1326 | int r_type = ELF32_R_TYPE (rel->r_info); |
| 1327 | |
| 1328 | if (r_type == R_BFIN_PCREL24 || r_type == R_BFIN_PCREL24_JUMP_L) |
| 1329 | { |
| 1330 | bfd_reloc_status_type r = bfd_reloc_ok; |
| 1331 | bfd_vma x; |
| 1332 | |
| 1333 | if (address > bfd_get_section_limit (input_bfd, input_section)) |
| 1334 | return bfd_reloc_outofrange; |
| 1335 | |
| 1336 | value += addend; |
| 1337 | |
| 1338 | /* Perform usual pc-relative correction. */ |
| 1339 | value -= input_section->output_section->vma + input_section->output_offset; |
| 1340 | value -= address; |
| 1341 | |
| 1342 | /* We are getting reloc_entry->address 2 byte off from |
| 1343 | the start of instruction. Assuming absolute postion |
| 1344 | of the reloc data. But, following code had been written assuming |
| 1345 | reloc address is starting at begining of instruction. |
| 1346 | To compensate that I have increased the value of |
| 1347 | relocation by 1 (effectively 2) and used the addr -2 instead of addr. */ |
| 1348 | |
| 1349 | value += 2; |
| 1350 | address -= 2; |
| 1351 | |
| 1352 | if ((value & 0xFF000000) != 0 |
| 1353 | && (value & 0xFF000000) != 0xFF000000) |
| 1354 | r = bfd_reloc_overflow; |
| 1355 | |
| 1356 | value >>= 1; |
| 1357 | |
| 1358 | x = bfd_get_16 (input_bfd, contents + address); |
| 1359 | x = (x & 0xff00) | ((value >> 16) & 0xff); |
| 1360 | bfd_put_16 (input_bfd, x, contents + address); |
| 1361 | |
| 1362 | x = bfd_get_16 (input_bfd, contents + address + 2); |
| 1363 | x = value & 0xFFFF; |
| 1364 | bfd_put_16 (input_bfd, x, contents + address + 2); |
| 1365 | return r; |
| 1366 | } |
| 1367 | |
| 1368 | return _bfd_final_link_relocate (howto, input_bfd, input_section, contents, |
| 1369 | rel->r_offset, value, addend); |
| 1370 | |
| 1371 | } |
| 1372 | |
| 1373 | static bfd_boolean |
| 1374 | bfin_relocate_section (bfd * output_bfd, |
| 1375 | struct bfd_link_info *info, |
| 1376 | bfd * input_bfd, |
| 1377 | asection * input_section, |
| 1378 | bfd_byte * contents, |
| 1379 | Elf_Internal_Rela * relocs, |
| 1380 | Elf_Internal_Sym * local_syms, |
| 1381 | asection ** local_sections) |
| 1382 | { |
| 1383 | bfd *dynobj; |
| 1384 | Elf_Internal_Shdr *symtab_hdr; |
| 1385 | struct elf_link_hash_entry **sym_hashes; |
| 1386 | bfd_vma *local_got_offsets; |
| 1387 | asection *sgot; |
| 1388 | Elf_Internal_Rela *rel; |
| 1389 | Elf_Internal_Rela *relend; |
| 1390 | int i = 0; |
| 1391 | |
| 1392 | dynobj = elf_hash_table (info)->dynobj; |
| 1393 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1394 | sym_hashes = elf_sym_hashes (input_bfd); |
| 1395 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 1396 | |
| 1397 | sgot = NULL; |
| 1398 | |
| 1399 | rel = relocs; |
| 1400 | relend = relocs + input_section->reloc_count; |
| 1401 | for (; rel < relend; rel++, i++) |
| 1402 | { |
| 1403 | int r_type; |
| 1404 | reloc_howto_type *howto; |
| 1405 | unsigned long r_symndx; |
| 1406 | struct elf_link_hash_entry *h; |
| 1407 | Elf_Internal_Sym *sym; |
| 1408 | asection *sec; |
| 1409 | bfd_vma relocation = 0; |
| 1410 | bfd_boolean unresolved_reloc; |
| 1411 | bfd_reloc_status_type r; |
| 1412 | bfd_vma address; |
| 1413 | |
| 1414 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1415 | if (r_type < 0 || r_type >= 243) |
| 1416 | { |
| 1417 | bfd_set_error (bfd_error_bad_value); |
| 1418 | return FALSE; |
| 1419 | } |
| 1420 | |
| 1421 | if (r_type == R_BFIN_GNU_VTENTRY |
| 1422 | || r_type == R_BFIN_GNU_VTINHERIT) |
| 1423 | continue; |
| 1424 | |
| 1425 | howto = bfin_reloc_type_lookup (input_bfd, r_type); |
| 1426 | if (howto == NULL) |
| 1427 | { |
| 1428 | bfd_set_error (bfd_error_bad_value); |
| 1429 | return FALSE; |
| 1430 | } |
| 1431 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1432 | |
| 1433 | h = NULL; |
| 1434 | sym = NULL; |
| 1435 | sec = NULL; |
| 1436 | unresolved_reloc = FALSE; |
| 1437 | |
| 1438 | if (r_symndx < symtab_hdr->sh_info) |
| 1439 | { |
| 1440 | sym = local_syms + r_symndx; |
| 1441 | sec = local_sections[r_symndx]; |
| 1442 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 1443 | } |
| 1444 | else |
| 1445 | { |
| 1446 | bfd_boolean warned, ignored; |
| 1447 | |
| 1448 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 1449 | r_symndx, symtab_hdr, sym_hashes, |
| 1450 | h, sec, relocation, |
| 1451 | unresolved_reloc, warned, ignored); |
| 1452 | } |
| 1453 | |
| 1454 | if (sec != NULL && discarded_section (sec)) |
| 1455 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 1456 | rel, 1, relend, howto, 0, contents); |
| 1457 | |
| 1458 | if (info->relocatable) |
| 1459 | continue; |
| 1460 | |
| 1461 | address = rel->r_offset; |
| 1462 | |
| 1463 | /* Then, process normally. */ |
| 1464 | switch (r_type) |
| 1465 | { |
| 1466 | case R_BFIN_GNU_VTINHERIT: |
| 1467 | case R_BFIN_GNU_VTENTRY: |
| 1468 | return bfd_reloc_ok; |
| 1469 | |
| 1470 | case R_BFIN_GOT: |
| 1471 | /* Relocation is to the address of the entry for this symbol |
| 1472 | in the global offset table. */ |
| 1473 | if (h != NULL |
| 1474 | && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0) |
| 1475 | goto do_default; |
| 1476 | /* Fall through. */ |
| 1477 | /* Relocation is the offset of the entry for this symbol in |
| 1478 | the global offset table. */ |
| 1479 | |
| 1480 | { |
| 1481 | bfd_vma off; |
| 1482 | |
| 1483 | if (dynobj == NULL) |
| 1484 | { |
| 1485 | /* Create the .got section. */ |
| 1486 | elf_hash_table (info)->dynobj = dynobj = output_bfd; |
| 1487 | if (!_bfd_elf_create_got_section (dynobj, info)) |
| 1488 | return FALSE; |
| 1489 | } |
| 1490 | |
| 1491 | if (sgot == NULL) |
| 1492 | { |
| 1493 | sgot = bfd_get_linker_section (dynobj, ".got"); |
| 1494 | BFD_ASSERT (sgot != NULL); |
| 1495 | } |
| 1496 | |
| 1497 | if (h != NULL) |
| 1498 | { |
| 1499 | bfd_boolean dyn; |
| 1500 | |
| 1501 | off = h->got.offset; |
| 1502 | BFD_ASSERT (off != (bfd_vma) - 1); |
| 1503 | dyn = elf_hash_table (info)->dynamic_sections_created; |
| 1504 | |
| 1505 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 1506 | || (info->shared |
| 1507 | && (info->symbolic |
| 1508 | || h->dynindx == -1 |
| 1509 | || h->forced_local) |
| 1510 | && h->def_regular)) |
| 1511 | { |
| 1512 | /* This is actually a static link, or it is a |
| 1513 | -Bsymbolic link and the symbol is defined |
| 1514 | locally, or the symbol was forced to be local |
| 1515 | because of a version file.. We must initialize |
| 1516 | this entry in the global offset table. Since |
| 1517 | the offset must always be a multiple of 4, we |
| 1518 | use the least significant bit to record whether |
| 1519 | we have initialized it already. |
| 1520 | |
| 1521 | When doing a dynamic link, we create a .rela.got |
| 1522 | relocation entry to initialize the value. This |
| 1523 | is done in the finish_dynamic_symbol routine. */ |
| 1524 | if ((off & 1) != 0) |
| 1525 | off &= ~1; |
| 1526 | else |
| 1527 | { |
| 1528 | bfd_put_32 (output_bfd, relocation, |
| 1529 | sgot->contents + off); |
| 1530 | h->got.offset |= 1; |
| 1531 | } |
| 1532 | } |
| 1533 | else |
| 1534 | unresolved_reloc = FALSE; |
| 1535 | } |
| 1536 | else |
| 1537 | { |
| 1538 | BFD_ASSERT (local_got_offsets != NULL); |
| 1539 | off = local_got_offsets[r_symndx]; |
| 1540 | BFD_ASSERT (off != (bfd_vma) - 1); |
| 1541 | |
| 1542 | /* The offset must always be a multiple of 4. We use |
| 1543 | the least significant bit to record whether we have |
| 1544 | already generated the necessary reloc. */ |
| 1545 | if ((off & 1) != 0) |
| 1546 | off &= ~1; |
| 1547 | else |
| 1548 | { |
| 1549 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); |
| 1550 | |
| 1551 | if (info->shared) |
| 1552 | { |
| 1553 | asection *s; |
| 1554 | Elf_Internal_Rela outrel; |
| 1555 | bfd_byte *loc; |
| 1556 | |
| 1557 | s = bfd_get_linker_section (dynobj, ".rela.got"); |
| 1558 | BFD_ASSERT (s != NULL); |
| 1559 | |
| 1560 | outrel.r_offset = (sgot->output_section->vma |
| 1561 | + sgot->output_offset + off); |
| 1562 | outrel.r_info = |
| 1563 | ELF32_R_INFO (0, R_BFIN_PCREL24); |
| 1564 | outrel.r_addend = relocation; |
| 1565 | loc = s->contents; |
| 1566 | loc += |
| 1567 | s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 1568 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 1569 | } |
| 1570 | |
| 1571 | local_got_offsets[r_symndx] |= 1; |
| 1572 | } |
| 1573 | } |
| 1574 | |
| 1575 | relocation = sgot->output_offset + off; |
| 1576 | rel->r_addend = 0; |
| 1577 | /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */ |
| 1578 | relocation /= 4; |
| 1579 | } |
| 1580 | goto do_default; |
| 1581 | |
| 1582 | default: |
| 1583 | do_default: |
| 1584 | r = bfin_final_link_relocate (rel, howto, input_bfd, input_section, |
| 1585 | contents, address, |
| 1586 | relocation, rel->r_addend); |
| 1587 | |
| 1588 | break; |
| 1589 | } |
| 1590 | |
| 1591 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| 1592 | because such sections are not SEC_ALLOC and thus ld.so will |
| 1593 | not process them. */ |
| 1594 | if (unresolved_reloc |
| 1595 | && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic) |
| 1596 | && _bfd_elf_section_offset (output_bfd, info, input_section, |
| 1597 | rel->r_offset) != (bfd_vma) -1) |
| 1598 | { |
| 1599 | (*_bfd_error_handler) |
| 1600 | (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"), |
| 1601 | input_bfd, |
| 1602 | input_section, (long) rel->r_offset, h->root.root.string); |
| 1603 | return FALSE; |
| 1604 | } |
| 1605 | |
| 1606 | if (r != bfd_reloc_ok) |
| 1607 | { |
| 1608 | const char *name; |
| 1609 | |
| 1610 | if (h != NULL) |
| 1611 | name = h->root.root.string; |
| 1612 | else |
| 1613 | { |
| 1614 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 1615 | symtab_hdr->sh_link, |
| 1616 | sym->st_name); |
| 1617 | if (name == NULL) |
| 1618 | return FALSE; |
| 1619 | if (*name == '\0') |
| 1620 | name = bfd_section_name (input_bfd, sec); |
| 1621 | } |
| 1622 | |
| 1623 | if (r == bfd_reloc_overflow) |
| 1624 | { |
| 1625 | if (!(info->callbacks->reloc_overflow |
| 1626 | (info, (h ? &h->root : NULL), name, howto->name, |
| 1627 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset))) |
| 1628 | return FALSE; |
| 1629 | } |
| 1630 | else |
| 1631 | { |
| 1632 | (*_bfd_error_handler) |
| 1633 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
| 1634 | input_bfd, input_section, |
| 1635 | (long) rel->r_offset, name, (int) r); |
| 1636 | return FALSE; |
| 1637 | } |
| 1638 | } |
| 1639 | } |
| 1640 | |
| 1641 | return TRUE; |
| 1642 | } |
| 1643 | |
| 1644 | static asection * |
| 1645 | bfin_gc_mark_hook (asection * sec, |
| 1646 | struct bfd_link_info *info, |
| 1647 | Elf_Internal_Rela * rel, |
| 1648 | struct elf_link_hash_entry *h, |
| 1649 | Elf_Internal_Sym * sym) |
| 1650 | { |
| 1651 | if (h != NULL) |
| 1652 | switch (ELF32_R_TYPE (rel->r_info)) |
| 1653 | { |
| 1654 | case R_BFIN_GNU_VTINHERIT: |
| 1655 | case R_BFIN_GNU_VTENTRY: |
| 1656 | return NULL; |
| 1657 | } |
| 1658 | |
| 1659 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 1660 | } |
| 1661 | |
| 1662 | /* Update the got entry reference counts for the section being removed. */ |
| 1663 | |
| 1664 | static bfd_boolean |
| 1665 | bfin_gc_sweep_hook (bfd * abfd, |
| 1666 | struct bfd_link_info *info, |
| 1667 | asection * sec, |
| 1668 | const Elf_Internal_Rela * relocs) |
| 1669 | { |
| 1670 | Elf_Internal_Shdr *symtab_hdr; |
| 1671 | struct elf_link_hash_entry **sym_hashes; |
| 1672 | bfd_signed_vma *local_got_refcounts; |
| 1673 | const Elf_Internal_Rela *rel, *relend; |
| 1674 | bfd *dynobj; |
| 1675 | asection *sgot; |
| 1676 | asection *srelgot; |
| 1677 | |
| 1678 | dynobj = elf_hash_table (info)->dynobj; |
| 1679 | if (dynobj == NULL) |
| 1680 | return TRUE; |
| 1681 | |
| 1682 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1683 | sym_hashes = elf_sym_hashes (abfd); |
| 1684 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 1685 | |
| 1686 | sgot = bfd_get_linker_section (dynobj, ".got"); |
| 1687 | srelgot = bfd_get_linker_section (dynobj, ".rela.got"); |
| 1688 | |
| 1689 | relend = relocs + sec->reloc_count; |
| 1690 | for (rel = relocs; rel < relend; rel++) |
| 1691 | { |
| 1692 | unsigned long r_symndx; |
| 1693 | struct elf_link_hash_entry *h; |
| 1694 | |
| 1695 | switch (ELF32_R_TYPE (rel->r_info)) |
| 1696 | { |
| 1697 | case R_BFIN_GOT: |
| 1698 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1699 | if (r_symndx >= symtab_hdr->sh_info) |
| 1700 | { |
| 1701 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1702 | if (h->got.refcount > 0) |
| 1703 | { |
| 1704 | --h->got.refcount; |
| 1705 | if (h->got.refcount == 0) |
| 1706 | { |
| 1707 | /* We don't need the .got entry any more. */ |
| 1708 | sgot->size -= 4; |
| 1709 | srelgot->size -= sizeof (Elf32_External_Rela); |
| 1710 | } |
| 1711 | } |
| 1712 | } |
| 1713 | else if (local_got_refcounts != NULL) |
| 1714 | { |
| 1715 | if (local_got_refcounts[r_symndx] > 0) |
| 1716 | { |
| 1717 | --local_got_refcounts[r_symndx]; |
| 1718 | if (local_got_refcounts[r_symndx] == 0) |
| 1719 | { |
| 1720 | /* We don't need the .got entry any more. */ |
| 1721 | sgot->size -= 4; |
| 1722 | if (info->shared) |
| 1723 | srelgot->size -= sizeof (Elf32_External_Rela); |
| 1724 | } |
| 1725 | } |
| 1726 | } |
| 1727 | break; |
| 1728 | default: |
| 1729 | break; |
| 1730 | } |
| 1731 | } |
| 1732 | return TRUE; |
| 1733 | } |
| 1734 | \f |
| 1735 | extern const bfd_target bfd_elf32_bfinfdpic_vec; |
| 1736 | #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_bfinfdpic_vec) |
| 1737 | |
| 1738 | /* An extension of the elf hash table data structure, |
| 1739 | containing some additional Blackfin-specific data. */ |
| 1740 | struct bfinfdpic_elf_link_hash_table |
| 1741 | { |
| 1742 | struct elf_link_hash_table elf; |
| 1743 | |
| 1744 | /* A pointer to the .got section. */ |
| 1745 | asection *sgot; |
| 1746 | /* A pointer to the .rel.got section. */ |
| 1747 | asection *sgotrel; |
| 1748 | /* A pointer to the .rofixup section. */ |
| 1749 | asection *sgotfixup; |
| 1750 | /* A pointer to the .plt section. */ |
| 1751 | asection *splt; |
| 1752 | /* A pointer to the .rel.plt section. */ |
| 1753 | asection *spltrel; |
| 1754 | /* GOT base offset. */ |
| 1755 | bfd_vma got0; |
| 1756 | /* Location of the first non-lazy PLT entry, i.e., the number of |
| 1757 | bytes taken by lazy PLT entries. */ |
| 1758 | bfd_vma plt0; |
| 1759 | /* A hash table holding information about which symbols were |
| 1760 | referenced with which PIC-related relocations. */ |
| 1761 | struct htab *relocs_info; |
| 1762 | /* Summary reloc information collected by |
| 1763 | _bfinfdpic_count_got_plt_entries. */ |
| 1764 | struct _bfinfdpic_dynamic_got_info *g; |
| 1765 | }; |
| 1766 | |
| 1767 | /* Get the Blackfin ELF linker hash table from a link_info structure. */ |
| 1768 | |
| 1769 | #define bfinfdpic_hash_table(info) \ |
| 1770 | (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \ |
| 1771 | == BFIN_ELF_DATA ? ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash)) : NULL) |
| 1772 | |
| 1773 | #define bfinfdpic_got_section(info) \ |
| 1774 | (bfinfdpic_hash_table (info)->sgot) |
| 1775 | #define bfinfdpic_gotrel_section(info) \ |
| 1776 | (bfinfdpic_hash_table (info)->sgotrel) |
| 1777 | #define bfinfdpic_gotfixup_section(info) \ |
| 1778 | (bfinfdpic_hash_table (info)->sgotfixup) |
| 1779 | #define bfinfdpic_plt_section(info) \ |
| 1780 | (bfinfdpic_hash_table (info)->splt) |
| 1781 | #define bfinfdpic_pltrel_section(info) \ |
| 1782 | (bfinfdpic_hash_table (info)->spltrel) |
| 1783 | #define bfinfdpic_relocs_info(info) \ |
| 1784 | (bfinfdpic_hash_table (info)->relocs_info) |
| 1785 | #define bfinfdpic_got_initial_offset(info) \ |
| 1786 | (bfinfdpic_hash_table (info)->got0) |
| 1787 | #define bfinfdpic_plt_initial_offset(info) \ |
| 1788 | (bfinfdpic_hash_table (info)->plt0) |
| 1789 | #define bfinfdpic_dynamic_got_plt_info(info) \ |
| 1790 | (bfinfdpic_hash_table (info)->g) |
| 1791 | |
| 1792 | /* The name of the dynamic interpreter. This is put in the .interp |
| 1793 | section. */ |
| 1794 | |
| 1795 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" |
| 1796 | |
| 1797 | #define DEFAULT_STACK_SIZE 0x20000 |
| 1798 | |
| 1799 | /* This structure is used to collect the number of entries present in |
| 1800 | each addressable range of the got. */ |
| 1801 | struct _bfinfdpic_dynamic_got_info |
| 1802 | { |
| 1803 | /* Several bits of information about the current link. */ |
| 1804 | struct bfd_link_info *info; |
| 1805 | /* Total size needed for GOT entries within the 18- or 32-bit |
| 1806 | ranges. */ |
| 1807 | bfd_vma got17m4, gothilo; |
| 1808 | /* Total size needed for function descriptor entries within the 18- |
| 1809 | or 32-bit ranges. */ |
| 1810 | bfd_vma fd17m4, fdhilo; |
| 1811 | /* Total size needed function descriptor entries referenced in PLT |
| 1812 | entries, that would be profitable to place in offsets close to |
| 1813 | the PIC register. */ |
| 1814 | bfd_vma fdplt; |
| 1815 | /* Total size needed by lazy PLT entries. */ |
| 1816 | bfd_vma lzplt; |
| 1817 | /* Number of relocations carried over from input object files. */ |
| 1818 | unsigned long relocs; |
| 1819 | /* Number of fixups introduced by relocations in input object files. */ |
| 1820 | unsigned long fixups; |
| 1821 | }; |
| 1822 | |
| 1823 | /* Create a Blackfin ELF linker hash table. */ |
| 1824 | |
| 1825 | static struct bfd_link_hash_table * |
| 1826 | bfinfdpic_elf_link_hash_table_create (bfd *abfd) |
| 1827 | { |
| 1828 | struct bfinfdpic_elf_link_hash_table *ret; |
| 1829 | bfd_size_type amt = sizeof (struct bfinfdpic_elf_link_hash_table); |
| 1830 | |
| 1831 | ret = bfd_zmalloc (amt); |
| 1832 | if (ret == NULL) |
| 1833 | return NULL; |
| 1834 | |
| 1835 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
| 1836 | _bfd_elf_link_hash_newfunc, |
| 1837 | sizeof (struct elf_link_hash_entry), |
| 1838 | BFIN_ELF_DATA)) |
| 1839 | { |
| 1840 | free (ret); |
| 1841 | return NULL; |
| 1842 | } |
| 1843 | |
| 1844 | return &ret->elf.root; |
| 1845 | } |
| 1846 | |
| 1847 | /* Decide whether a reference to a symbol can be resolved locally or |
| 1848 | not. If the symbol is protected, we want the local address, but |
| 1849 | its function descriptor must be assigned by the dynamic linker. */ |
| 1850 | #define BFINFDPIC_SYM_LOCAL(INFO, H) \ |
| 1851 | (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \ |
| 1852 | || ! elf_hash_table (INFO)->dynamic_sections_created) |
| 1853 | #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \ |
| 1854 | ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created) |
| 1855 | |
| 1856 | /* This structure collects information on what kind of GOT, PLT or |
| 1857 | function descriptors are required by relocations that reference a |
| 1858 | certain symbol. */ |
| 1859 | struct bfinfdpic_relocs_info |
| 1860 | { |
| 1861 | /* The index of the symbol, as stored in the relocation r_info, if |
| 1862 | we have a local symbol; -1 otherwise. */ |
| 1863 | long symndx; |
| 1864 | union |
| 1865 | { |
| 1866 | /* The input bfd in which the symbol is defined, if it's a local |
| 1867 | symbol. */ |
| 1868 | bfd *abfd; |
| 1869 | /* If symndx == -1, the hash table entry corresponding to a global |
| 1870 | symbol (even if it turns out to bind locally, in which case it |
| 1871 | should ideally be replaced with section's symndx + addend). */ |
| 1872 | struct elf_link_hash_entry *h; |
| 1873 | } d; |
| 1874 | /* The addend of the relocation that references the symbol. */ |
| 1875 | bfd_vma addend; |
| 1876 | |
| 1877 | /* The fields above are used to identify an entry. The fields below |
| 1878 | contain information on how an entry is used and, later on, which |
| 1879 | locations it was assigned. */ |
| 1880 | /* The following 2 fields record whether the symbol+addend above was |
| 1881 | ever referenced with a GOT relocation. The 17M4 suffix indicates a |
| 1882 | GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */ |
| 1883 | unsigned got17m4; |
| 1884 | unsigned gothilo; |
| 1885 | /* Whether a FUNCDESC relocation references symbol+addend. */ |
| 1886 | unsigned fd; |
| 1887 | /* Whether a FUNCDESC_GOT relocation references symbol+addend. */ |
| 1888 | unsigned fdgot17m4; |
| 1889 | unsigned fdgothilo; |
| 1890 | /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */ |
| 1891 | unsigned fdgoff17m4; |
| 1892 | unsigned fdgoffhilo; |
| 1893 | /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or |
| 1894 | GOTOFFHI relocations. The addend doesn't really matter, since we |
| 1895 | envision that this will only be used to check whether the symbol |
| 1896 | is mapped to the same segment as the got. */ |
| 1897 | unsigned gotoff; |
| 1898 | /* Whether symbol+addend is referenced by a LABEL24 relocation. */ |
| 1899 | unsigned call; |
| 1900 | /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE |
| 1901 | relocation. */ |
| 1902 | unsigned sym; |
| 1903 | /* Whether we need a PLT entry for a symbol. Should be implied by |
| 1904 | something like: |
| 1905 | (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */ |
| 1906 | unsigned plt:1; |
| 1907 | /* Whether a function descriptor should be created in this link unit |
| 1908 | for symbol+addend. Should be implied by something like: |
| 1909 | (plt || fdgotoff17m4 || fdgotofflohi |
| 1910 | || ((fd || fdgot17m4 || fdgothilo) |
| 1911 | && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */ |
| 1912 | unsigned privfd:1; |
| 1913 | /* Whether a lazy PLT entry is needed for this symbol+addend. |
| 1914 | Should be implied by something like: |
| 1915 | (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h) |
| 1916 | && ! (info->flags & DF_BIND_NOW)) */ |
| 1917 | unsigned lazyplt:1; |
| 1918 | /* Whether we've already emitted GOT relocations and PLT entries as |
| 1919 | needed for this symbol. */ |
| 1920 | unsigned done:1; |
| 1921 | |
| 1922 | /* The number of R_BFIN_BYTE4_DATA, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE |
| 1923 | relocations referencing the symbol. */ |
| 1924 | unsigned relocs32, relocsfd, relocsfdv; |
| 1925 | |
| 1926 | /* The number of .rofixups entries and dynamic relocations allocated |
| 1927 | for this symbol, minus any that might have already been used. */ |
| 1928 | unsigned fixups, dynrelocs; |
| 1929 | |
| 1930 | /* The offsets of the GOT entries assigned to symbol+addend, to the |
| 1931 | function descriptor's address, and to a function descriptor, |
| 1932 | respectively. Should be zero if unassigned. The offsets are |
| 1933 | counted from the value that will be assigned to the PIC register, |
| 1934 | not from the beginning of the .got section. */ |
| 1935 | bfd_signed_vma got_entry, fdgot_entry, fd_entry; |
| 1936 | /* The offsets of the PLT entries assigned to symbol+addend, |
| 1937 | non-lazy and lazy, respectively. If unassigned, should be |
| 1938 | (bfd_vma)-1. */ |
| 1939 | bfd_vma plt_entry, lzplt_entry; |
| 1940 | }; |
| 1941 | |
| 1942 | /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */ |
| 1943 | static hashval_t |
| 1944 | bfinfdpic_relocs_info_hash (const void *entry_) |
| 1945 | { |
| 1946 | const struct bfinfdpic_relocs_info *entry = entry_; |
| 1947 | |
| 1948 | return (entry->symndx == -1 |
| 1949 | ? (long) entry->d.h->root.root.hash |
| 1950 | : entry->symndx + (long) entry->d.abfd->id * 257) + entry->addend; |
| 1951 | } |
| 1952 | |
| 1953 | /* Test whether the key fields of two bfinfdpic_relocs_info entries are |
| 1954 | identical. */ |
| 1955 | static int |
| 1956 | bfinfdpic_relocs_info_eq (const void *entry1, const void *entry2) |
| 1957 | { |
| 1958 | const struct bfinfdpic_relocs_info *e1 = entry1; |
| 1959 | const struct bfinfdpic_relocs_info *e2 = entry2; |
| 1960 | |
| 1961 | return e1->symndx == e2->symndx && e1->addend == e2->addend |
| 1962 | && (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd); |
| 1963 | } |
| 1964 | |
| 1965 | /* Find or create an entry in a hash table HT that matches the key |
| 1966 | fields of the given ENTRY. If it's not found, memory for a new |
| 1967 | entry is allocated in ABFD's obstack. */ |
| 1968 | static struct bfinfdpic_relocs_info * |
| 1969 | bfinfdpic_relocs_info_find (struct htab *ht, |
| 1970 | bfd *abfd, |
| 1971 | const struct bfinfdpic_relocs_info *entry, |
| 1972 | enum insert_option insert) |
| 1973 | { |
| 1974 | struct bfinfdpic_relocs_info **loc; |
| 1975 | |
| 1976 | if (!ht) |
| 1977 | return NULL; |
| 1978 | |
| 1979 | loc = (struct bfinfdpic_relocs_info **) htab_find_slot (ht, entry, insert); |
| 1980 | |
| 1981 | if (! loc) |
| 1982 | return NULL; |
| 1983 | |
| 1984 | if (*loc) |
| 1985 | return *loc; |
| 1986 | |
| 1987 | *loc = bfd_zalloc (abfd, sizeof (**loc)); |
| 1988 | |
| 1989 | if (! *loc) |
| 1990 | return *loc; |
| 1991 | |
| 1992 | (*loc)->symndx = entry->symndx; |
| 1993 | (*loc)->d = entry->d; |
| 1994 | (*loc)->addend = entry->addend; |
| 1995 | (*loc)->plt_entry = (bfd_vma)-1; |
| 1996 | (*loc)->lzplt_entry = (bfd_vma)-1; |
| 1997 | |
| 1998 | return *loc; |
| 1999 | } |
| 2000 | |
| 2001 | /* Obtain the address of the entry in HT associated with H's symbol + |
| 2002 | addend, creating a new entry if none existed. ABFD is only used |
| 2003 | for memory allocation purposes. */ |
| 2004 | inline static struct bfinfdpic_relocs_info * |
| 2005 | bfinfdpic_relocs_info_for_global (struct htab *ht, |
| 2006 | bfd *abfd, |
| 2007 | struct elf_link_hash_entry *h, |
| 2008 | bfd_vma addend, |
| 2009 | enum insert_option insert) |
| 2010 | { |
| 2011 | struct bfinfdpic_relocs_info entry; |
| 2012 | |
| 2013 | entry.symndx = -1; |
| 2014 | entry.d.h = h; |
| 2015 | entry.addend = addend; |
| 2016 | |
| 2017 | return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert); |
| 2018 | } |
| 2019 | |
| 2020 | /* Obtain the address of the entry in HT associated with the SYMNDXth |
| 2021 | local symbol of the input bfd ABFD, plus the addend, creating a new |
| 2022 | entry if none existed. */ |
| 2023 | inline static struct bfinfdpic_relocs_info * |
| 2024 | bfinfdpic_relocs_info_for_local (struct htab *ht, |
| 2025 | bfd *abfd, |
| 2026 | long symndx, |
| 2027 | bfd_vma addend, |
| 2028 | enum insert_option insert) |
| 2029 | { |
| 2030 | struct bfinfdpic_relocs_info entry; |
| 2031 | |
| 2032 | entry.symndx = symndx; |
| 2033 | entry.d.abfd = abfd; |
| 2034 | entry.addend = addend; |
| 2035 | |
| 2036 | return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert); |
| 2037 | } |
| 2038 | |
| 2039 | /* Merge fields set by check_relocs() of two entries that end up being |
| 2040 | mapped to the same (presumably global) symbol. */ |
| 2041 | |
| 2042 | inline static void |
| 2043 | bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info *e2, |
| 2044 | struct bfinfdpic_relocs_info const *e1) |
| 2045 | { |
| 2046 | e2->got17m4 |= e1->got17m4; |
| 2047 | e2->gothilo |= e1->gothilo; |
| 2048 | e2->fd |= e1->fd; |
| 2049 | e2->fdgot17m4 |= e1->fdgot17m4; |
| 2050 | e2->fdgothilo |= e1->fdgothilo; |
| 2051 | e2->fdgoff17m4 |= e1->fdgoff17m4; |
| 2052 | e2->fdgoffhilo |= e1->fdgoffhilo; |
| 2053 | e2->gotoff |= e1->gotoff; |
| 2054 | e2->call |= e1->call; |
| 2055 | e2->sym |= e1->sym; |
| 2056 | } |
| 2057 | |
| 2058 | /* Every block of 65535 lazy PLT entries shares a single call to the |
| 2059 | resolver, inserted in the 32768th lazy PLT entry (i.e., entry # |
| 2060 | 32767, counting from 0). All other lazy PLT entries branch to it |
| 2061 | in a single instruction. */ |
| 2062 | |
| 2063 | #define LZPLT_RESOLVER_EXTRA 10 |
| 2064 | #define LZPLT_NORMAL_SIZE 6 |
| 2065 | #define LZPLT_ENTRIES 1362 |
| 2066 | |
| 2067 | #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA) |
| 2068 | #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2) |
| 2069 | |
| 2070 | /* Add a dynamic relocation to the SRELOC section. */ |
| 2071 | |
| 2072 | inline static bfd_vma |
| 2073 | _bfinfdpic_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset, |
| 2074 | int reloc_type, long dynindx, bfd_vma addend, |
| 2075 | struct bfinfdpic_relocs_info *entry) |
| 2076 | { |
| 2077 | Elf_Internal_Rela outrel; |
| 2078 | bfd_vma reloc_offset; |
| 2079 | |
| 2080 | outrel.r_offset = offset; |
| 2081 | outrel.r_info = ELF32_R_INFO (dynindx, reloc_type); |
| 2082 | outrel.r_addend = addend; |
| 2083 | |
| 2084 | reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel); |
| 2085 | BFD_ASSERT (reloc_offset < sreloc->size); |
| 2086 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, |
| 2087 | sreloc->contents + reloc_offset); |
| 2088 | sreloc->reloc_count++; |
| 2089 | |
| 2090 | /* If the entry's index is zero, this relocation was probably to a |
| 2091 | linkonce section that got discarded. We reserved a dynamic |
| 2092 | relocation, but it was for another entry than the one we got at |
| 2093 | the time of emitting the relocation. Unfortunately there's no |
| 2094 | simple way for us to catch this situation, since the relocation |
| 2095 | is cleared right before calling relocate_section, at which point |
| 2096 | we no longer know what the relocation used to point to. */ |
| 2097 | if (entry->symndx) |
| 2098 | { |
| 2099 | BFD_ASSERT (entry->dynrelocs > 0); |
| 2100 | entry->dynrelocs--; |
| 2101 | } |
| 2102 | |
| 2103 | return reloc_offset; |
| 2104 | } |
| 2105 | |
| 2106 | /* Add a fixup to the ROFIXUP section. */ |
| 2107 | |
| 2108 | static bfd_vma |
| 2109 | _bfinfdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset, |
| 2110 | struct bfinfdpic_relocs_info *entry) |
| 2111 | { |
| 2112 | bfd_vma fixup_offset; |
| 2113 | |
| 2114 | if (rofixup->flags & SEC_EXCLUDE) |
| 2115 | return -1; |
| 2116 | |
| 2117 | fixup_offset = rofixup->reloc_count * 4; |
| 2118 | if (rofixup->contents) |
| 2119 | { |
| 2120 | BFD_ASSERT (fixup_offset < rofixup->size); |
| 2121 | bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset); |
| 2122 | } |
| 2123 | rofixup->reloc_count++; |
| 2124 | |
| 2125 | if (entry && entry->symndx) |
| 2126 | { |
| 2127 | /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc |
| 2128 | above. */ |
| 2129 | BFD_ASSERT (entry->fixups > 0); |
| 2130 | entry->fixups--; |
| 2131 | } |
| 2132 | |
| 2133 | return fixup_offset; |
| 2134 | } |
| 2135 | |
| 2136 | /* Find the segment number in which OSEC, and output section, is |
| 2137 | located. */ |
| 2138 | |
| 2139 | static unsigned |
| 2140 | _bfinfdpic_osec_to_segment (bfd *output_bfd, asection *osec) |
| 2141 | { |
| 2142 | Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section (output_bfd, osec); |
| 2143 | |
| 2144 | return (p != NULL) ? p - elf_tdata (output_bfd)->phdr : -1; |
| 2145 | } |
| 2146 | |
| 2147 | inline static bfd_boolean |
| 2148 | _bfinfdpic_osec_readonly_p (bfd *output_bfd, asection *osec) |
| 2149 | { |
| 2150 | unsigned seg = _bfinfdpic_osec_to_segment (output_bfd, osec); |
| 2151 | |
| 2152 | return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W); |
| 2153 | } |
| 2154 | |
| 2155 | /* Generate relocations for GOT entries, function descriptors, and |
| 2156 | code for PLT and lazy PLT entries. */ |
| 2157 | |
| 2158 | inline static bfd_boolean |
| 2159 | _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry, |
| 2160 | bfd *output_bfd, |
| 2161 | struct bfd_link_info *info, |
| 2162 | asection *sec, |
| 2163 | Elf_Internal_Sym *sym, |
| 2164 | bfd_vma addend) |
| 2165 | { |
| 2166 | bfd_vma fd_lazy_rel_offset = (bfd_vma) -1; |
| 2167 | int dynindx = -1; |
| 2168 | |
| 2169 | if (entry->done) |
| 2170 | return TRUE; |
| 2171 | entry->done = 1; |
| 2172 | |
| 2173 | if (entry->got_entry || entry->fdgot_entry || entry->fd_entry) |
| 2174 | { |
| 2175 | /* If the symbol is dynamic, consider it for dynamic |
| 2176 | relocations, otherwise decay to section + offset. */ |
| 2177 | if (entry->symndx == -1 && entry->d.h->dynindx != -1) |
| 2178 | dynindx = entry->d.h->dynindx; |
| 2179 | else |
| 2180 | { |
| 2181 | if (sec |
| 2182 | && sec->output_section |
| 2183 | && ! bfd_is_abs_section (sec->output_section) |
| 2184 | && ! bfd_is_und_section (sec->output_section)) |
| 2185 | dynindx = elf_section_data (sec->output_section)->dynindx; |
| 2186 | else |
| 2187 | dynindx = 0; |
| 2188 | } |
| 2189 | } |
| 2190 | |
| 2191 | /* Generate relocation for GOT entry pointing to the symbol. */ |
| 2192 | if (entry->got_entry) |
| 2193 | { |
| 2194 | int idx = dynindx; |
| 2195 | bfd_vma ad = addend; |
| 2196 | |
| 2197 | /* If the symbol is dynamic but binds locally, use |
| 2198 | section+offset. */ |
| 2199 | if (sec && (entry->symndx != -1 |
| 2200 | || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) |
| 2201 | { |
| 2202 | if (entry->symndx == -1) |
| 2203 | ad += entry->d.h->root.u.def.value; |
| 2204 | else |
| 2205 | ad += sym->st_value; |
| 2206 | ad += sec->output_offset; |
| 2207 | if (sec->output_section && elf_section_data (sec->output_section)) |
| 2208 | idx = elf_section_data (sec->output_section)->dynindx; |
| 2209 | else |
| 2210 | idx = 0; |
| 2211 | } |
| 2212 | |
| 2213 | /* If we're linking an executable at a fixed address, we can |
| 2214 | omit the dynamic relocation as long as the symbol is local to |
| 2215 | this module. */ |
| 2216 | if (info->executable && !info->pie |
| 2217 | && (entry->symndx != -1 |
| 2218 | || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) |
| 2219 | { |
| 2220 | if (sec) |
| 2221 | ad += sec->output_section->vma; |
| 2222 | if (entry->symndx != -1 |
| 2223 | || entry->d.h->root.type != bfd_link_hash_undefweak) |
| 2224 | _bfinfdpic_add_rofixup (output_bfd, |
| 2225 | bfinfdpic_gotfixup_section (info), |
| 2226 | bfinfdpic_got_section (info)->output_section |
| 2227 | ->vma |
| 2228 | + bfinfdpic_got_section (info)->output_offset |
| 2229 | + bfinfdpic_got_initial_offset (info) |
| 2230 | + entry->got_entry, entry); |
| 2231 | } |
| 2232 | else |
| 2233 | _bfinfdpic_add_dyn_reloc (output_bfd, bfinfdpic_gotrel_section (info), |
| 2234 | _bfd_elf_section_offset |
| 2235 | (output_bfd, info, |
| 2236 | bfinfdpic_got_section (info), |
| 2237 | bfinfdpic_got_initial_offset (info) |
| 2238 | + entry->got_entry) |
| 2239 | + bfinfdpic_got_section (info) |
| 2240 | ->output_section->vma |
| 2241 | + bfinfdpic_got_section (info)->output_offset, |
| 2242 | R_BFIN_BYTE4_DATA, idx, ad, entry); |
| 2243 | |
| 2244 | bfd_put_32 (output_bfd, ad, |
| 2245 | bfinfdpic_got_section (info)->contents |
| 2246 | + bfinfdpic_got_initial_offset (info) |
| 2247 | + entry->got_entry); |
| 2248 | } |
| 2249 | |
| 2250 | /* Generate relocation for GOT entry pointing to a canonical |
| 2251 | function descriptor. */ |
| 2252 | if (entry->fdgot_entry) |
| 2253 | { |
| 2254 | int reloc, idx; |
| 2255 | bfd_vma ad = 0; |
| 2256 | |
| 2257 | if (! (entry->symndx == -1 |
| 2258 | && entry->d.h->root.type == bfd_link_hash_undefweak |
| 2259 | && BFINFDPIC_SYM_LOCAL (info, entry->d.h))) |
| 2260 | { |
| 2261 | /* If the symbol is dynamic and there may be dynamic symbol |
| 2262 | resolution because we are, or are linked with, a shared |
| 2263 | library, emit a FUNCDESC relocation such that the dynamic |
| 2264 | linker will allocate the function descriptor. If the |
| 2265 | symbol needs a non-local function descriptor but binds |
| 2266 | locally (e.g., its visibility is protected, emit a |
| 2267 | dynamic relocation decayed to section+offset. */ |
| 2268 | if (entry->symndx == -1 |
| 2269 | && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h) |
| 2270 | && BFINFDPIC_SYM_LOCAL (info, entry->d.h) |
| 2271 | && !(info->executable && !info->pie)) |
| 2272 | { |
| 2273 | reloc = R_BFIN_FUNCDESC; |
| 2274 | idx = elf_section_data (entry->d.h->root.u.def.section |
| 2275 | ->output_section)->dynindx; |
| 2276 | ad = entry->d.h->root.u.def.section->output_offset |
| 2277 | + entry->d.h->root.u.def.value; |
| 2278 | } |
| 2279 | else if (entry->symndx == -1 |
| 2280 | && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)) |
| 2281 | { |
| 2282 | reloc = R_BFIN_FUNCDESC; |
| 2283 | idx = dynindx; |
| 2284 | ad = addend; |
| 2285 | if (ad) |
| 2286 | return FALSE; |
| 2287 | } |
| 2288 | else |
| 2289 | { |
| 2290 | /* Otherwise, we know we have a private function descriptor, |
| 2291 | so reference it directly. */ |
| 2292 | if (elf_hash_table (info)->dynamic_sections_created) |
| 2293 | BFD_ASSERT (entry->privfd); |
| 2294 | reloc = R_BFIN_BYTE4_DATA; |
| 2295 | idx = elf_section_data (bfinfdpic_got_section (info) |
| 2296 | ->output_section)->dynindx; |
| 2297 | ad = bfinfdpic_got_section (info)->output_offset |
| 2298 | + bfinfdpic_got_initial_offset (info) + entry->fd_entry; |
| 2299 | } |
| 2300 | |
| 2301 | /* If there is room for dynamic symbol resolution, emit the |
| 2302 | dynamic relocation. However, if we're linking an |
| 2303 | executable at a fixed location, we won't have emitted a |
| 2304 | dynamic symbol entry for the got section, so idx will be |
| 2305 | zero, which means we can and should compute the address |
| 2306 | of the private descriptor ourselves. */ |
| 2307 | if (info->executable && !info->pie |
| 2308 | && (entry->symndx != -1 |
| 2309 | || BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h))) |
| 2310 | { |
| 2311 | ad += bfinfdpic_got_section (info)->output_section->vma; |
| 2312 | _bfinfdpic_add_rofixup (output_bfd, |
| 2313 | bfinfdpic_gotfixup_section (info), |
| 2314 | bfinfdpic_got_section (info) |
| 2315 | ->output_section->vma |
| 2316 | + bfinfdpic_got_section (info) |
| 2317 | ->output_offset |
| 2318 | + bfinfdpic_got_initial_offset (info) |
| 2319 | + entry->fdgot_entry, entry); |
| 2320 | } |
| 2321 | else |
| 2322 | _bfinfdpic_add_dyn_reloc (output_bfd, |
| 2323 | bfinfdpic_gotrel_section (info), |
| 2324 | _bfd_elf_section_offset |
| 2325 | (output_bfd, info, |
| 2326 | bfinfdpic_got_section (info), |
| 2327 | bfinfdpic_got_initial_offset (info) |
| 2328 | + entry->fdgot_entry) |
| 2329 | + bfinfdpic_got_section (info) |
| 2330 | ->output_section->vma |
| 2331 | + bfinfdpic_got_section (info) |
| 2332 | ->output_offset, |
| 2333 | reloc, idx, ad, entry); |
| 2334 | } |
| 2335 | |
| 2336 | bfd_put_32 (output_bfd, ad, |
| 2337 | bfinfdpic_got_section (info)->contents |
| 2338 | + bfinfdpic_got_initial_offset (info) |
| 2339 | + entry->fdgot_entry); |
| 2340 | } |
| 2341 | |
| 2342 | /* Generate relocation to fill in a private function descriptor in |
| 2343 | the GOT. */ |
| 2344 | if (entry->fd_entry) |
| 2345 | { |
| 2346 | int idx = dynindx; |
| 2347 | bfd_vma ad = addend; |
| 2348 | bfd_vma ofst; |
| 2349 | long lowword, highword; |
| 2350 | |
| 2351 | /* If the symbol is dynamic but binds locally, use |
| 2352 | section+offset. */ |
| 2353 | if (sec && (entry->symndx != -1 |
| 2354 | || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) |
| 2355 | { |
| 2356 | if (entry->symndx == -1) |
| 2357 | ad += entry->d.h->root.u.def.value; |
| 2358 | else |
| 2359 | ad += sym->st_value; |
| 2360 | ad += sec->output_offset; |
| 2361 | if (sec->output_section && elf_section_data (sec->output_section)) |
| 2362 | idx = elf_section_data (sec->output_section)->dynindx; |
| 2363 | else |
| 2364 | idx = 0; |
| 2365 | } |
| 2366 | |
| 2367 | /* If we're linking an executable at a fixed address, we can |
| 2368 | omit the dynamic relocation as long as the symbol is local to |
| 2369 | this module. */ |
| 2370 | if (info->executable && !info->pie |
| 2371 | && (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (info, entry->d.h))) |
| 2372 | { |
| 2373 | if (sec) |
| 2374 | ad += sec->output_section->vma; |
| 2375 | ofst = 0; |
| 2376 | if (entry->symndx != -1 |
| 2377 | || entry->d.h->root.type != bfd_link_hash_undefweak) |
| 2378 | { |
| 2379 | _bfinfdpic_add_rofixup (output_bfd, |
| 2380 | bfinfdpic_gotfixup_section (info), |
| 2381 | bfinfdpic_got_section (info) |
| 2382 | ->output_section->vma |
| 2383 | + bfinfdpic_got_section (info) |
| 2384 | ->output_offset |
| 2385 | + bfinfdpic_got_initial_offset (info) |
| 2386 | + entry->fd_entry, entry); |
| 2387 | _bfinfdpic_add_rofixup (output_bfd, |
| 2388 | bfinfdpic_gotfixup_section (info), |
| 2389 | bfinfdpic_got_section (info) |
| 2390 | ->output_section->vma |
| 2391 | + bfinfdpic_got_section (info) |
| 2392 | ->output_offset |
| 2393 | + bfinfdpic_got_initial_offset (info) |
| 2394 | + entry->fd_entry + 4, entry); |
| 2395 | } |
| 2396 | } |
| 2397 | else |
| 2398 | { |
| 2399 | ofst |
| 2400 | = _bfinfdpic_add_dyn_reloc (output_bfd, |
| 2401 | entry->lazyplt |
| 2402 | ? bfinfdpic_pltrel_section (info) |
| 2403 | : bfinfdpic_gotrel_section (info), |
| 2404 | _bfd_elf_section_offset |
| 2405 | (output_bfd, info, |
| 2406 | bfinfdpic_got_section (info), |
| 2407 | bfinfdpic_got_initial_offset (info) |
| 2408 | + entry->fd_entry) |
| 2409 | + bfinfdpic_got_section (info) |
| 2410 | ->output_section->vma |
| 2411 | + bfinfdpic_got_section (info) |
| 2412 | ->output_offset, |
| 2413 | R_BFIN_FUNCDESC_VALUE, idx, ad, entry); |
| 2414 | } |
| 2415 | |
| 2416 | /* If we've omitted the dynamic relocation, just emit the fixed |
| 2417 | addresses of the symbol and of the local GOT base offset. */ |
| 2418 | if (info->executable && !info->pie && sec && sec->output_section) |
| 2419 | { |
| 2420 | lowword = ad; |
| 2421 | highword = bfinfdpic_got_section (info)->output_section->vma |
| 2422 | + bfinfdpic_got_section (info)->output_offset |
| 2423 | + bfinfdpic_got_initial_offset (info); |
| 2424 | } |
| 2425 | else if (entry->lazyplt) |
| 2426 | { |
| 2427 | if (ad) |
| 2428 | return FALSE; |
| 2429 | |
| 2430 | fd_lazy_rel_offset = ofst; |
| 2431 | |
| 2432 | /* A function descriptor used for lazy or local resolving is |
| 2433 | initialized such that its high word contains the output |
| 2434 | section index in which the PLT entries are located, and |
| 2435 | the low word contains the address of the lazy PLT entry |
| 2436 | entry point, that must be within the memory region |
| 2437 | assigned to that section. */ |
| 2438 | lowword = entry->lzplt_entry + 4 |
| 2439 | + bfinfdpic_plt_section (info)->output_offset |
| 2440 | + bfinfdpic_plt_section (info)->output_section->vma; |
| 2441 | highword = _bfinfdpic_osec_to_segment |
| 2442 | (output_bfd, bfinfdpic_plt_section (info)->output_section); |
| 2443 | } |
| 2444 | else |
| 2445 | { |
| 2446 | /* A function descriptor for a local function gets the index |
| 2447 | of the section. For a non-local function, it's |
| 2448 | disregarded. */ |
| 2449 | lowword = ad; |
| 2450 | if (sec == NULL |
| 2451 | || (entry->symndx == -1 && entry->d.h->dynindx != -1 |
| 2452 | && entry->d.h->dynindx == idx)) |
| 2453 | highword = 0; |
| 2454 | else |
| 2455 | highword = _bfinfdpic_osec_to_segment |
| 2456 | (output_bfd, sec->output_section); |
| 2457 | } |
| 2458 | |
| 2459 | bfd_put_32 (output_bfd, lowword, |
| 2460 | bfinfdpic_got_section (info)->contents |
| 2461 | + bfinfdpic_got_initial_offset (info) |
| 2462 | + entry->fd_entry); |
| 2463 | bfd_put_32 (output_bfd, highword, |
| 2464 | bfinfdpic_got_section (info)->contents |
| 2465 | + bfinfdpic_got_initial_offset (info) |
| 2466 | + entry->fd_entry + 4); |
| 2467 | } |
| 2468 | |
| 2469 | /* Generate code for the PLT entry. */ |
| 2470 | if (entry->plt_entry != (bfd_vma) -1) |
| 2471 | { |
| 2472 | bfd_byte *plt_code = bfinfdpic_plt_section (info)->contents |
| 2473 | + entry->plt_entry; |
| 2474 | |
| 2475 | BFD_ASSERT (entry->fd_entry); |
| 2476 | |
| 2477 | /* Figure out what kind of PLT entry we need, depending on the |
| 2478 | location of the function descriptor within the GOT. */ |
| 2479 | if (entry->fd_entry >= -(1 << (18 - 1)) |
| 2480 | && entry->fd_entry + 4 < (1 << (18 - 1))) |
| 2481 | { |
| 2482 | /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */ |
| 2483 | bfd_put_32 (output_bfd, |
| 2484 | 0xe519 | ((entry->fd_entry << 14) & 0xFFFF0000), |
| 2485 | plt_code); |
| 2486 | bfd_put_32 (output_bfd, |
| 2487 | 0xe51b | (((entry->fd_entry + 4) << 14) & 0xFFFF0000), |
| 2488 | plt_code + 4); |
| 2489 | plt_code += 8; |
| 2490 | } |
| 2491 | else |
| 2492 | { |
| 2493 | /* P1.L = fd_entry; P1.H = fd_entry; |
| 2494 | P3 = P3 + P1; |
| 2495 | P1 = [P3]; |
| 2496 | P3 = [P3 + 4]; */ |
| 2497 | bfd_put_32 (output_bfd, |
| 2498 | 0xe109 | (entry->fd_entry << 16), |
| 2499 | plt_code); |
| 2500 | bfd_put_32 (output_bfd, |
| 2501 | 0xe149 | (entry->fd_entry & 0xFFFF0000), |
| 2502 | plt_code + 4); |
| 2503 | bfd_put_16 (output_bfd, 0x5ad9, plt_code + 8); |
| 2504 | bfd_put_16 (output_bfd, 0x9159, plt_code + 10); |
| 2505 | bfd_put_16 (output_bfd, 0xac5b, plt_code + 12); |
| 2506 | plt_code += 14; |
| 2507 | } |
| 2508 | /* JUMP (P1) */ |
| 2509 | bfd_put_16 (output_bfd, 0x0051, plt_code); |
| 2510 | } |
| 2511 | |
| 2512 | /* Generate code for the lazy PLT entry. */ |
| 2513 | if (entry->lzplt_entry != (bfd_vma) -1) |
| 2514 | { |
| 2515 | bfd_byte *lzplt_code = bfinfdpic_plt_section (info)->contents |
| 2516 | + entry->lzplt_entry; |
| 2517 | bfd_vma resolverStub_addr; |
| 2518 | |
| 2519 | bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code); |
| 2520 | lzplt_code += 4; |
| 2521 | |
| 2522 | resolverStub_addr = entry->lzplt_entry / BFINFDPIC_LZPLT_BLOCK_SIZE |
| 2523 | * BFINFDPIC_LZPLT_BLOCK_SIZE + BFINFDPIC_LZPLT_RESOLV_LOC; |
| 2524 | if (resolverStub_addr >= bfinfdpic_plt_initial_offset (info)) |
| 2525 | resolverStub_addr = bfinfdpic_plt_initial_offset (info) - LZPLT_NORMAL_SIZE - LZPLT_RESOLVER_EXTRA; |
| 2526 | |
| 2527 | if (entry->lzplt_entry == resolverStub_addr) |
| 2528 | { |
| 2529 | /* This is a lazy PLT entry that includes a resolver call. |
| 2530 | P2 = [P3]; |
| 2531 | R3 = [P3 + 4]; |
| 2532 | JUMP (P2); */ |
| 2533 | bfd_put_32 (output_bfd, |
| 2534 | 0xa05b915a, |
| 2535 | lzplt_code); |
| 2536 | bfd_put_16 (output_bfd, 0x0052, lzplt_code + 4); |
| 2537 | } |
| 2538 | else |
| 2539 | { |
| 2540 | /* JUMP.S resolverStub */ |
| 2541 | bfd_put_16 (output_bfd, |
| 2542 | 0x2000 |
| 2543 | | (((resolverStub_addr - entry->lzplt_entry) |
| 2544 | / 2) & (((bfd_vma)1 << 12) - 1)), |
| 2545 | lzplt_code); |
| 2546 | } |
| 2547 | } |
| 2548 | |
| 2549 | return TRUE; |
| 2550 | } |
| 2551 | \f |
| 2552 | /* Relocate an Blackfin ELF section. |
| 2553 | |
| 2554 | The RELOCATE_SECTION function is called by the new ELF backend linker |
| 2555 | to handle the relocations for a section. |
| 2556 | |
| 2557 | The relocs are always passed as Rela structures; if the section |
| 2558 | actually uses Rel structures, the r_addend field will always be |
| 2559 | zero. |
| 2560 | |
| 2561 | This function is responsible for adjusting the section contents as |
| 2562 | necessary, and (if using Rela relocs and generating a relocatable |
| 2563 | output file) adjusting the reloc addend as necessary. |
| 2564 | |
| 2565 | This function does not have to worry about setting the reloc |
| 2566 | address or the reloc symbol index. |
| 2567 | |
| 2568 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 2569 | |
| 2570 | LOCAL_SECTIONS is an array giving the section in the input file |
| 2571 | corresponding to the st_shndx field of each local symbol. |
| 2572 | |
| 2573 | The global hash table entry for the global symbols can be found |
| 2574 | via elf_sym_hashes (input_bfd). |
| 2575 | |
| 2576 | When generating relocatable output, this function must handle |
| 2577 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 2578 | going to be the section symbol corresponding to the output |
| 2579 | section, which means that the addend must be adjusted |
| 2580 | accordingly. */ |
| 2581 | |
| 2582 | static bfd_boolean |
| 2583 | bfinfdpic_relocate_section (bfd * output_bfd, |
| 2584 | struct bfd_link_info *info, |
| 2585 | bfd * input_bfd, |
| 2586 | asection * input_section, |
| 2587 | bfd_byte * contents, |
| 2588 | Elf_Internal_Rela * relocs, |
| 2589 | Elf_Internal_Sym * local_syms, |
| 2590 | asection ** local_sections) |
| 2591 | { |
| 2592 | Elf_Internal_Shdr *symtab_hdr; |
| 2593 | struct elf_link_hash_entry **sym_hashes; |
| 2594 | Elf_Internal_Rela *rel; |
| 2595 | Elf_Internal_Rela *relend; |
| 2596 | unsigned isec_segment, got_segment, plt_segment, |
| 2597 | check_segment[2]; |
| 2598 | int silence_segment_error = !(info->shared || info->pie); |
| 2599 | |
| 2600 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
| 2601 | sym_hashes = elf_sym_hashes (input_bfd); |
| 2602 | relend = relocs + input_section->reloc_count; |
| 2603 | |
| 2604 | isec_segment = _bfinfdpic_osec_to_segment (output_bfd, |
| 2605 | input_section->output_section); |
| 2606 | if (IS_FDPIC (output_bfd) && bfinfdpic_got_section (info)) |
| 2607 | got_segment = _bfinfdpic_osec_to_segment (output_bfd, |
| 2608 | bfinfdpic_got_section (info) |
| 2609 | ->output_section); |
| 2610 | else |
| 2611 | got_segment = -1; |
| 2612 | if (IS_FDPIC (output_bfd) && elf_hash_table (info)->dynamic_sections_created) |
| 2613 | plt_segment = _bfinfdpic_osec_to_segment (output_bfd, |
| 2614 | bfinfdpic_plt_section (info) |
| 2615 | ->output_section); |
| 2616 | else |
| 2617 | plt_segment = -1; |
| 2618 | |
| 2619 | for (rel = relocs; rel < relend; rel ++) |
| 2620 | { |
| 2621 | reloc_howto_type *howto; |
| 2622 | unsigned long r_symndx; |
| 2623 | Elf_Internal_Sym *sym; |
| 2624 | asection *sec; |
| 2625 | struct elf_link_hash_entry *h; |
| 2626 | bfd_vma relocation; |
| 2627 | bfd_reloc_status_type r; |
| 2628 | const char * name = NULL; |
| 2629 | int r_type; |
| 2630 | asection *osec; |
| 2631 | struct bfinfdpic_relocs_info *picrel; |
| 2632 | bfd_vma orig_addend = rel->r_addend; |
| 2633 | |
| 2634 | r_type = ELF32_R_TYPE (rel->r_info); |
| 2635 | |
| 2636 | if (r_type == R_BFIN_GNU_VTINHERIT |
| 2637 | || r_type == R_BFIN_GNU_VTENTRY) |
| 2638 | continue; |
| 2639 | |
| 2640 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2641 | howto = bfin_reloc_type_lookup (input_bfd, r_type); |
| 2642 | if (howto == NULL) |
| 2643 | { |
| 2644 | bfd_set_error (bfd_error_bad_value); |
| 2645 | return FALSE; |
| 2646 | } |
| 2647 | |
| 2648 | h = NULL; |
| 2649 | sym = NULL; |
| 2650 | sec = NULL; |
| 2651 | |
| 2652 | if (r_symndx < symtab_hdr->sh_info) |
| 2653 | { |
| 2654 | sym = local_syms + r_symndx; |
| 2655 | osec = sec = local_sections [r_symndx]; |
| 2656 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 2657 | |
| 2658 | name = bfd_elf_string_from_elf_section |
| 2659 | (input_bfd, symtab_hdr->sh_link, sym->st_name); |
| 2660 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; |
| 2661 | } |
| 2662 | else |
| 2663 | { |
| 2664 | bfd_boolean warned, ignored; |
| 2665 | bfd_boolean unresolved_reloc; |
| 2666 | |
| 2667 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 2668 | r_symndx, symtab_hdr, sym_hashes, |
| 2669 | h, sec, relocation, |
| 2670 | unresolved_reloc, warned, ignored); |
| 2671 | osec = sec; |
| 2672 | } |
| 2673 | |
| 2674 | if (sec != NULL && discarded_section (sec)) |
| 2675 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 2676 | rel, 1, relend, howto, 0, contents); |
| 2677 | |
| 2678 | if (info->relocatable) |
| 2679 | continue; |
| 2680 | |
| 2681 | if (h != NULL |
| 2682 | && (h->root.type == bfd_link_hash_defined |
| 2683 | || h->root.type == bfd_link_hash_defweak) |
| 2684 | && !BFINFDPIC_SYM_LOCAL (info, h)) |
| 2685 | { |
| 2686 | osec = sec = NULL; |
| 2687 | relocation = 0; |
| 2688 | } |
| 2689 | |
| 2690 | switch (r_type) |
| 2691 | { |
| 2692 | case R_BFIN_PCREL24: |
| 2693 | case R_BFIN_PCREL24_JUMP_L: |
| 2694 | case R_BFIN_BYTE4_DATA: |
| 2695 | if (! IS_FDPIC (output_bfd)) |
| 2696 | goto non_fdpic; |
| 2697 | |
| 2698 | case R_BFIN_GOT17M4: |
| 2699 | case R_BFIN_GOTHI: |
| 2700 | case R_BFIN_GOTLO: |
| 2701 | case R_BFIN_FUNCDESC_GOT17M4: |
| 2702 | case R_BFIN_FUNCDESC_GOTHI: |
| 2703 | case R_BFIN_FUNCDESC_GOTLO: |
| 2704 | case R_BFIN_GOTOFF17M4: |
| 2705 | case R_BFIN_GOTOFFHI: |
| 2706 | case R_BFIN_GOTOFFLO: |
| 2707 | case R_BFIN_FUNCDESC_GOTOFF17M4: |
| 2708 | case R_BFIN_FUNCDESC_GOTOFFHI: |
| 2709 | case R_BFIN_FUNCDESC_GOTOFFLO: |
| 2710 | case R_BFIN_FUNCDESC: |
| 2711 | case R_BFIN_FUNCDESC_VALUE: |
| 2712 | if (h != NULL) |
| 2713 | picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info |
| 2714 | (info), input_bfd, h, |
| 2715 | orig_addend, INSERT); |
| 2716 | else |
| 2717 | /* In order to find the entry we created before, we must |
| 2718 | use the original addend, not the one that may have been |
| 2719 | modified by _bfd_elf_rela_local_sym(). */ |
| 2720 | picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info |
| 2721 | (info), input_bfd, r_symndx, |
| 2722 | orig_addend, INSERT); |
| 2723 | if (! picrel) |
| 2724 | return FALSE; |
| 2725 | |
| 2726 | if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info, |
| 2727 | osec, sym, |
| 2728 | rel->r_addend)) |
| 2729 | { |
| 2730 | (*_bfd_error_handler) |
| 2731 | (_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"), |
| 2732 | input_bfd, input_section, rel->r_offset, name); |
| 2733 | return FALSE; |
| 2734 | |
| 2735 | } |
| 2736 | |
| 2737 | break; |
| 2738 | |
| 2739 | default: |
| 2740 | non_fdpic: |
| 2741 | picrel = NULL; |
| 2742 | if (h && ! BFINFDPIC_SYM_LOCAL (info, h) |
| 2743 | && _bfd_elf_section_offset (output_bfd, info, input_section, |
| 2744 | rel->r_offset) != (bfd_vma) -1) |
| 2745 | { |
| 2746 | info->callbacks->warning |
| 2747 | (info, _("relocation references symbol not defined in the module"), |
| 2748 | name, input_bfd, input_section, rel->r_offset); |
| 2749 | return FALSE; |
| 2750 | } |
| 2751 | break; |
| 2752 | } |
| 2753 | |
| 2754 | switch (r_type) |
| 2755 | { |
| 2756 | case R_BFIN_PCREL24: |
| 2757 | case R_BFIN_PCREL24_JUMP_L: |
| 2758 | check_segment[0] = isec_segment; |
| 2759 | if (! IS_FDPIC (output_bfd)) |
| 2760 | check_segment[1] = isec_segment; |
| 2761 | else if (picrel->plt) |
| 2762 | { |
| 2763 | relocation = bfinfdpic_plt_section (info)->output_section->vma |
| 2764 | + bfinfdpic_plt_section (info)->output_offset |
| 2765 | + picrel->plt_entry; |
| 2766 | check_segment[1] = plt_segment; |
| 2767 | } |
| 2768 | /* We don't want to warn on calls to undefined weak symbols, |
| 2769 | as calls to them must be protected by non-NULL tests |
| 2770 | anyway, and unprotected calls would invoke undefined |
| 2771 | behavior. */ |
| 2772 | else if (picrel->symndx == -1 |
| 2773 | && picrel->d.h->root.type == bfd_link_hash_undefweak) |
| 2774 | check_segment[1] = check_segment[0]; |
| 2775 | else |
| 2776 | check_segment[1] = sec |
| 2777 | ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section) |
| 2778 | : (unsigned)-1; |
| 2779 | break; |
| 2780 | |
| 2781 | case R_BFIN_GOT17M4: |
| 2782 | case R_BFIN_GOTHI: |
| 2783 | case R_BFIN_GOTLO: |
| 2784 | relocation = picrel->got_entry; |
| 2785 | check_segment[0] = check_segment[1] = got_segment; |
| 2786 | break; |
| 2787 | |
| 2788 | case R_BFIN_FUNCDESC_GOT17M4: |
| 2789 | case R_BFIN_FUNCDESC_GOTHI: |
| 2790 | case R_BFIN_FUNCDESC_GOTLO: |
| 2791 | relocation = picrel->fdgot_entry; |
| 2792 | check_segment[0] = check_segment[1] = got_segment; |
| 2793 | break; |
| 2794 | |
| 2795 | case R_BFIN_GOTOFFHI: |
| 2796 | case R_BFIN_GOTOFF17M4: |
| 2797 | case R_BFIN_GOTOFFLO: |
| 2798 | relocation -= bfinfdpic_got_section (info)->output_section->vma |
| 2799 | + bfinfdpic_got_section (info)->output_offset |
| 2800 | + bfinfdpic_got_initial_offset (info); |
| 2801 | check_segment[0] = got_segment; |
| 2802 | check_segment[1] = sec |
| 2803 | ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section) |
| 2804 | : (unsigned)-1; |
| 2805 | break; |
| 2806 | |
| 2807 | case R_BFIN_FUNCDESC_GOTOFF17M4: |
| 2808 | case R_BFIN_FUNCDESC_GOTOFFHI: |
| 2809 | case R_BFIN_FUNCDESC_GOTOFFLO: |
| 2810 | relocation = picrel->fd_entry; |
| 2811 | check_segment[0] = check_segment[1] = got_segment; |
| 2812 | break; |
| 2813 | |
| 2814 | case R_BFIN_FUNCDESC: |
| 2815 | { |
| 2816 | int dynindx; |
| 2817 | bfd_vma addend = rel->r_addend; |
| 2818 | |
| 2819 | if (! (h && h->root.type == bfd_link_hash_undefweak |
| 2820 | && BFINFDPIC_SYM_LOCAL (info, h))) |
| 2821 | { |
| 2822 | /* If the symbol is dynamic and there may be dynamic |
| 2823 | symbol resolution because we are or are linked with a |
| 2824 | shared library, emit a FUNCDESC relocation such that |
| 2825 | the dynamic linker will allocate the function |
| 2826 | descriptor. If the symbol needs a non-local function |
| 2827 | descriptor but binds locally (e.g., its visibility is |
| 2828 | protected, emit a dynamic relocation decayed to |
| 2829 | section+offset. */ |
| 2830 | if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h) |
| 2831 | && BFINFDPIC_SYM_LOCAL (info, h) |
| 2832 | && !(info->executable && !info->pie)) |
| 2833 | { |
| 2834 | dynindx = elf_section_data (h->root.u.def.section |
| 2835 | ->output_section)->dynindx; |
| 2836 | addend += h->root.u.def.section->output_offset |
| 2837 | + h->root.u.def.value; |
| 2838 | } |
| 2839 | else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)) |
| 2840 | { |
| 2841 | if (addend) |
| 2842 | { |
| 2843 | info->callbacks->warning |
| 2844 | (info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"), |
| 2845 | name, input_bfd, input_section, rel->r_offset); |
| 2846 | return FALSE; |
| 2847 | } |
| 2848 | dynindx = h->dynindx; |
| 2849 | } |
| 2850 | else |
| 2851 | { |
| 2852 | /* Otherwise, we know we have a private function |
| 2853 | descriptor, so reference it directly. */ |
| 2854 | BFD_ASSERT (picrel->privfd); |
| 2855 | r_type = R_BFIN_BYTE4_DATA; |
| 2856 | dynindx = elf_section_data (bfinfdpic_got_section (info) |
| 2857 | ->output_section)->dynindx; |
| 2858 | addend = bfinfdpic_got_section (info)->output_offset |
| 2859 | + bfinfdpic_got_initial_offset (info) |
| 2860 | + picrel->fd_entry; |
| 2861 | } |
| 2862 | |
| 2863 | /* If there is room for dynamic symbol resolution, emit |
| 2864 | the dynamic relocation. However, if we're linking an |
| 2865 | executable at a fixed location, we won't have emitted a |
| 2866 | dynamic symbol entry for the got section, so idx will |
| 2867 | be zero, which means we can and should compute the |
| 2868 | address of the private descriptor ourselves. */ |
| 2869 | if (info->executable && !info->pie |
| 2870 | && (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h))) |
| 2871 | { |
| 2872 | bfd_vma offset; |
| 2873 | |
| 2874 | addend += bfinfdpic_got_section (info)->output_section->vma; |
| 2875 | if ((bfd_get_section_flags (output_bfd, |
| 2876 | input_section->output_section) |
| 2877 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) |
| 2878 | { |
| 2879 | if (_bfinfdpic_osec_readonly_p (output_bfd, |
| 2880 | input_section |
| 2881 | ->output_section)) |
| 2882 | { |
| 2883 | info->callbacks->warning |
| 2884 | (info, |
| 2885 | _("cannot emit fixups in read-only section"), |
| 2886 | name, input_bfd, input_section, rel->r_offset); |
| 2887 | return FALSE; |
| 2888 | } |
| 2889 | |
| 2890 | offset = _bfd_elf_section_offset |
| 2891 | (output_bfd, info, |
| 2892 | input_section, rel->r_offset); |
| 2893 | |
| 2894 | if (offset != (bfd_vma)-1) |
| 2895 | _bfinfdpic_add_rofixup (output_bfd, |
| 2896 | bfinfdpic_gotfixup_section |
| 2897 | (info), |
| 2898 | offset + input_section |
| 2899 | ->output_section->vma |
| 2900 | + input_section->output_offset, |
| 2901 | picrel); |
| 2902 | } |
| 2903 | } |
| 2904 | else if ((bfd_get_section_flags (output_bfd, |
| 2905 | input_section->output_section) |
| 2906 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) |
| 2907 | { |
| 2908 | bfd_vma offset; |
| 2909 | |
| 2910 | if (_bfinfdpic_osec_readonly_p (output_bfd, |
| 2911 | input_section |
| 2912 | ->output_section)) |
| 2913 | { |
| 2914 | info->callbacks->warning |
| 2915 | (info, |
| 2916 | _("cannot emit dynamic relocations in read-only section"), |
| 2917 | name, input_bfd, input_section, rel->r_offset); |
| 2918 | return FALSE; |
| 2919 | } |
| 2920 | offset = _bfd_elf_section_offset (output_bfd, info, |
| 2921 | input_section, rel->r_offset); |
| 2922 | |
| 2923 | if (offset != (bfd_vma)-1) |
| 2924 | _bfinfdpic_add_dyn_reloc (output_bfd, |
| 2925 | bfinfdpic_gotrel_section (info), |
| 2926 | offset + input_section |
| 2927 | ->output_section->vma |
| 2928 | + input_section->output_offset, |
| 2929 | r_type, |
| 2930 | dynindx, addend, picrel); |
| 2931 | } |
| 2932 | else |
| 2933 | addend += bfinfdpic_got_section (info)->output_section->vma; |
| 2934 | } |
| 2935 | |
| 2936 | /* We want the addend in-place because dynamic |
| 2937 | relocations are REL. Setting relocation to it should |
| 2938 | arrange for it to be installed. */ |
| 2939 | relocation = addend - rel->r_addend; |
| 2940 | } |
| 2941 | check_segment[0] = check_segment[1] = got_segment; |
| 2942 | break; |
| 2943 | |
| 2944 | case R_BFIN_BYTE4_DATA: |
| 2945 | if (! IS_FDPIC (output_bfd)) |
| 2946 | { |
| 2947 | check_segment[0] = check_segment[1] = -1; |
| 2948 | break; |
| 2949 | } |
| 2950 | /* Fall through. */ |
| 2951 | case R_BFIN_FUNCDESC_VALUE: |
| 2952 | { |
| 2953 | int dynindx; |
| 2954 | bfd_vma addend = rel->r_addend; |
| 2955 | bfd_vma offset; |
| 2956 | offset = _bfd_elf_section_offset (output_bfd, info, |
| 2957 | input_section, rel->r_offset); |
| 2958 | |
| 2959 | /* If the symbol is dynamic but binds locally, use |
| 2960 | section+offset. */ |
| 2961 | if (h && ! BFINFDPIC_SYM_LOCAL (info, h)) |
| 2962 | { |
| 2963 | if (addend && r_type == R_BFIN_FUNCDESC_VALUE) |
| 2964 | { |
| 2965 | info->callbacks->warning |
| 2966 | (info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"), |
| 2967 | name, input_bfd, input_section, rel->r_offset); |
| 2968 | return FALSE; |
| 2969 | } |
| 2970 | dynindx = h->dynindx; |
| 2971 | } |
| 2972 | else |
| 2973 | { |
| 2974 | if (h) |
| 2975 | addend += h->root.u.def.value; |
| 2976 | else |
| 2977 | addend += sym->st_value; |
| 2978 | if (osec) |
| 2979 | addend += osec->output_offset; |
| 2980 | if (osec && osec->output_section |
| 2981 | && ! bfd_is_abs_section (osec->output_section) |
| 2982 | && ! bfd_is_und_section (osec->output_section)) |
| 2983 | dynindx = elf_section_data (osec->output_section)->dynindx; |
| 2984 | else |
| 2985 | dynindx = 0; |
| 2986 | } |
| 2987 | |
| 2988 | /* If we're linking an executable at a fixed address, we |
| 2989 | can omit the dynamic relocation as long as the symbol |
| 2990 | is defined in the current link unit (which is implied |
| 2991 | by its output section not being NULL). */ |
| 2992 | if (info->executable && !info->pie |
| 2993 | && (!h || BFINFDPIC_SYM_LOCAL (info, h))) |
| 2994 | { |
| 2995 | if (osec) |
| 2996 | addend += osec->output_section->vma; |
| 2997 | if (IS_FDPIC (input_bfd) |
| 2998 | && (bfd_get_section_flags (output_bfd, |
| 2999 | input_section->output_section) |
| 3000 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) |
| 3001 | { |
| 3002 | if (_bfinfdpic_osec_readonly_p (output_bfd, |
| 3003 | input_section |
| 3004 | ->output_section)) |
| 3005 | { |
| 3006 | info->callbacks->warning |
| 3007 | (info, |
| 3008 | _("cannot emit fixups in read-only section"), |
| 3009 | name, input_bfd, input_section, rel->r_offset); |
| 3010 | return FALSE; |
| 3011 | } |
| 3012 | if (!h || h->root.type != bfd_link_hash_undefweak) |
| 3013 | { |
| 3014 | if (offset != (bfd_vma)-1) |
| 3015 | { |
| 3016 | _bfinfdpic_add_rofixup (output_bfd, |
| 3017 | bfinfdpic_gotfixup_section |
| 3018 | (info), |
| 3019 | offset + input_section |
| 3020 | ->output_section->vma |
| 3021 | + input_section->output_offset, |
| 3022 | picrel); |
| 3023 | |
| 3024 | if (r_type == R_BFIN_FUNCDESC_VALUE) |
| 3025 | _bfinfdpic_add_rofixup |
| 3026 | (output_bfd, |
| 3027 | bfinfdpic_gotfixup_section (info), |
| 3028 | offset + input_section->output_section->vma |
| 3029 | + input_section->output_offset + 4, picrel); |
| 3030 | } |
| 3031 | } |
| 3032 | } |
| 3033 | } |
| 3034 | else |
| 3035 | { |
| 3036 | if ((bfd_get_section_flags (output_bfd, |
| 3037 | input_section->output_section) |
| 3038 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) |
| 3039 | { |
| 3040 | if (_bfinfdpic_osec_readonly_p (output_bfd, |
| 3041 | input_section |
| 3042 | ->output_section)) |
| 3043 | { |
| 3044 | info->callbacks->warning |
| 3045 | (info, |
| 3046 | _("cannot emit dynamic relocations in read-only section"), |
| 3047 | name, input_bfd, input_section, rel->r_offset); |
| 3048 | return FALSE; |
| 3049 | } |
| 3050 | |
| 3051 | if (offset != (bfd_vma)-1) |
| 3052 | _bfinfdpic_add_dyn_reloc (output_bfd, |
| 3053 | bfinfdpic_gotrel_section (info), |
| 3054 | offset |
| 3055 | + input_section->output_section->vma |
| 3056 | + input_section->output_offset, |
| 3057 | r_type, dynindx, addend, picrel); |
| 3058 | } |
| 3059 | else if (osec) |
| 3060 | addend += osec->output_section->vma; |
| 3061 | /* We want the addend in-place because dynamic |
| 3062 | relocations are REL. Setting relocation to it |
| 3063 | should arrange for it to be installed. */ |
| 3064 | relocation = addend - rel->r_addend; |
| 3065 | } |
| 3066 | |
| 3067 | if (r_type == R_BFIN_FUNCDESC_VALUE) |
| 3068 | { |
| 3069 | /* If we've omitted the dynamic relocation, just emit |
| 3070 | the fixed addresses of the symbol and of the local |
| 3071 | GOT base offset. */ |
| 3072 | if (info->executable && !info->pie |
| 3073 | && (!h || BFINFDPIC_SYM_LOCAL (info, h))) |
| 3074 | bfd_put_32 (output_bfd, |
| 3075 | bfinfdpic_got_section (info)->output_section->vma |
| 3076 | + bfinfdpic_got_section (info)->output_offset |
| 3077 | + bfinfdpic_got_initial_offset (info), |
| 3078 | contents + rel->r_offset + 4); |
| 3079 | else |
| 3080 | /* A function descriptor used for lazy or local |
| 3081 | resolving is initialized such that its high word |
| 3082 | contains the output section index in which the |
| 3083 | PLT entries are located, and the low word |
| 3084 | contains the offset of the lazy PLT entry entry |
| 3085 | point into that section. */ |
| 3086 | bfd_put_32 (output_bfd, |
| 3087 | h && ! BFINFDPIC_SYM_LOCAL (info, h) |
| 3088 | ? 0 |
| 3089 | : _bfinfdpic_osec_to_segment (output_bfd, |
| 3090 | sec |
| 3091 | ->output_section), |
| 3092 | contents + rel->r_offset + 4); |
| 3093 | } |
| 3094 | } |
| 3095 | check_segment[0] = check_segment[1] = got_segment; |
| 3096 | break; |
| 3097 | |
| 3098 | default: |
| 3099 | check_segment[0] = isec_segment; |
| 3100 | check_segment[1] = sec |
| 3101 | ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section) |
| 3102 | : (unsigned)-1; |
| 3103 | break; |
| 3104 | } |
| 3105 | |
| 3106 | if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd)) |
| 3107 | { |
| 3108 | #if 1 /* If you take this out, remove the #error from fdpic-static-6.d |
| 3109 | in the ld testsuite. */ |
| 3110 | /* This helps catch problems in GCC while we can't do more |
| 3111 | than static linking. The idea is to test whether the |
| 3112 | input file basename is crt0.o only once. */ |
| 3113 | if (silence_segment_error == 1) |
| 3114 | silence_segment_error = |
| 3115 | (strlen (input_bfd->filename) == 6 |
| 3116 | && filename_cmp (input_bfd->filename, "crt0.o") == 0) |
| 3117 | || (strlen (input_bfd->filename) > 6 |
| 3118 | && filename_cmp (input_bfd->filename |
| 3119 | + strlen (input_bfd->filename) - 7, |
| 3120 | "/crt0.o") == 0) |
| 3121 | ? -1 : 0; |
| 3122 | #endif |
| 3123 | if (!silence_segment_error |
| 3124 | /* We don't want duplicate errors for undefined |
| 3125 | symbols. */ |
| 3126 | && !(picrel && picrel->symndx == -1 |
| 3127 | && picrel->d.h->root.type == bfd_link_hash_undefined)) |
| 3128 | info->callbacks->warning |
| 3129 | (info, |
| 3130 | (info->shared || info->pie) |
| 3131 | ? _("relocations between different segments are not supported") |
| 3132 | : _("warning: relocation references a different segment"), |
| 3133 | name, input_bfd, input_section, rel->r_offset); |
| 3134 | if (!silence_segment_error && (info->shared || info->pie)) |
| 3135 | return FALSE; |
| 3136 | elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC; |
| 3137 | } |
| 3138 | |
| 3139 | switch (r_type) |
| 3140 | { |
| 3141 | case R_BFIN_GOTOFFHI: |
| 3142 | /* We need the addend to be applied before we shift the |
| 3143 | value right. */ |
| 3144 | relocation += rel->r_addend; |
| 3145 | /* Fall through. */ |
| 3146 | case R_BFIN_GOTHI: |
| 3147 | case R_BFIN_FUNCDESC_GOTHI: |
| 3148 | case R_BFIN_FUNCDESC_GOTOFFHI: |
| 3149 | relocation >>= 16; |
| 3150 | /* Fall through. */ |
| 3151 | |
| 3152 | case R_BFIN_GOTLO: |
| 3153 | case R_BFIN_FUNCDESC_GOTLO: |
| 3154 | case R_BFIN_GOTOFFLO: |
| 3155 | case R_BFIN_FUNCDESC_GOTOFFLO: |
| 3156 | relocation &= 0xffff; |
| 3157 | break; |
| 3158 | |
| 3159 | default: |
| 3160 | break; |
| 3161 | } |
| 3162 | |
| 3163 | switch (r_type) |
| 3164 | { |
| 3165 | case R_BFIN_PCREL24: |
| 3166 | case R_BFIN_PCREL24_JUMP_L: |
| 3167 | if (! IS_FDPIC (output_bfd) || ! picrel->plt) |
| 3168 | break; |
| 3169 | /* Fall through. */ |
| 3170 | |
| 3171 | /* When referencing a GOT entry, a function descriptor or a |
| 3172 | PLT, we don't want the addend to apply to the reference, |
| 3173 | but rather to the referenced symbol. The actual entry |
| 3174 | will have already been created taking the addend into |
| 3175 | account, so cancel it out here. */ |
| 3176 | case R_BFIN_GOT17M4: |
| 3177 | case R_BFIN_GOTHI: |
| 3178 | case R_BFIN_GOTLO: |
| 3179 | case R_BFIN_FUNCDESC_GOT17M4: |
| 3180 | case R_BFIN_FUNCDESC_GOTHI: |
| 3181 | case R_BFIN_FUNCDESC_GOTLO: |
| 3182 | case R_BFIN_FUNCDESC_GOTOFF17M4: |
| 3183 | case R_BFIN_FUNCDESC_GOTOFFHI: |
| 3184 | case R_BFIN_FUNCDESC_GOTOFFLO: |
| 3185 | /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4 |
| 3186 | here, since we do want to apply the addend to the others. |
| 3187 | Note that we've applied the addend to GOTOFFHI before we |
| 3188 | shifted it right. */ |
| 3189 | case R_BFIN_GOTOFFHI: |
| 3190 | relocation -= rel->r_addend; |
| 3191 | break; |
| 3192 | |
| 3193 | default: |
| 3194 | break; |
| 3195 | } |
| 3196 | |
| 3197 | r = bfin_final_link_relocate (rel, howto, input_bfd, input_section, |
| 3198 | contents, rel->r_offset, |
| 3199 | relocation, rel->r_addend); |
| 3200 | |
| 3201 | if (r != bfd_reloc_ok) |
| 3202 | { |
| 3203 | const char * msg = (const char *) NULL; |
| 3204 | |
| 3205 | switch (r) |
| 3206 | { |
| 3207 | case bfd_reloc_overflow: |
| 3208 | r = info->callbacks->reloc_overflow |
| 3209 | (info, (h ? &h->root : NULL), name, howto->name, |
| 3210 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); |
| 3211 | break; |
| 3212 | |
| 3213 | case bfd_reloc_undefined: |
| 3214 | r = info->callbacks->undefined_symbol |
| 3215 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); |
| 3216 | break; |
| 3217 | |
| 3218 | case bfd_reloc_outofrange: |
| 3219 | msg = _("internal error: out of range error"); |
| 3220 | break; |
| 3221 | |
| 3222 | case bfd_reloc_notsupported: |
| 3223 | msg = _("internal error: unsupported relocation error"); |
| 3224 | break; |
| 3225 | |
| 3226 | case bfd_reloc_dangerous: |
| 3227 | msg = _("internal error: dangerous relocation"); |
| 3228 | break; |
| 3229 | |
| 3230 | default: |
| 3231 | msg = _("internal error: unknown error"); |
| 3232 | break; |
| 3233 | } |
| 3234 | |
| 3235 | if (msg) |
| 3236 | r = info->callbacks->warning |
| 3237 | (info, msg, name, input_bfd, input_section, rel->r_offset); |
| 3238 | |
| 3239 | if (! r) |
| 3240 | return FALSE; |
| 3241 | } |
| 3242 | } |
| 3243 | |
| 3244 | return TRUE; |
| 3245 | } |
| 3246 | |
| 3247 | /* Update the relocation information for the relocations of the section |
| 3248 | being removed. */ |
| 3249 | |
| 3250 | static bfd_boolean |
| 3251 | bfinfdpic_gc_sweep_hook (bfd *abfd, |
| 3252 | struct bfd_link_info *info, |
| 3253 | asection *sec, |
| 3254 | const Elf_Internal_Rela *relocs) |
| 3255 | { |
| 3256 | Elf_Internal_Shdr *symtab_hdr; |
| 3257 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; |
| 3258 | const Elf_Internal_Rela *rel; |
| 3259 | const Elf_Internal_Rela *rel_end; |
| 3260 | struct bfinfdpic_relocs_info *picrel; |
| 3261 | |
| 3262 | BFD_ASSERT (IS_FDPIC (abfd)); |
| 3263 | |
| 3264 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 3265 | sym_hashes = elf_sym_hashes (abfd); |
| 3266 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym); |
| 3267 | if (!elf_bad_symtab (abfd)) |
| 3268 | sym_hashes_end -= symtab_hdr->sh_info; |
| 3269 | |
| 3270 | rel_end = relocs + sec->reloc_count; |
| 3271 | for (rel = relocs; rel < rel_end; rel++) |
| 3272 | { |
| 3273 | struct elf_link_hash_entry *h; |
| 3274 | unsigned long r_symndx; |
| 3275 | |
| 3276 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 3277 | if (r_symndx < symtab_hdr->sh_info) |
| 3278 | h = NULL; |
| 3279 | else |
| 3280 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3281 | |
| 3282 | if (h != NULL) |
| 3283 | picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info), |
| 3284 | abfd, h, |
| 3285 | rel->r_addend, NO_INSERT); |
| 3286 | else |
| 3287 | picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info |
| 3288 | (info), abfd, r_symndx, |
| 3289 | rel->r_addend, NO_INSERT); |
| 3290 | |
| 3291 | if (!picrel) |
| 3292 | return TRUE; |
| 3293 | |
| 3294 | switch (ELF32_R_TYPE (rel->r_info)) |
| 3295 | { |
| 3296 | case R_BFIN_PCREL24: |
| 3297 | case R_BFIN_PCREL24_JUMP_L: |
| 3298 | picrel->call--; |
| 3299 | break; |
| 3300 | |
| 3301 | case R_BFIN_FUNCDESC_VALUE: |
| 3302 | picrel->relocsfdv--; |
| 3303 | if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC) |
| 3304 | picrel->relocs32++; |
| 3305 | /* Fall through. */ |
| 3306 | |
| 3307 | case R_BFIN_BYTE4_DATA: |
| 3308 | picrel->sym--; |
| 3309 | if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC) |
| 3310 | picrel->relocs32--; |
| 3311 | break; |
| 3312 | |
| 3313 | case R_BFIN_GOT17M4: |
| 3314 | picrel->got17m4--; |
| 3315 | break; |
| 3316 | |
| 3317 | case R_BFIN_GOTHI: |
| 3318 | case R_BFIN_GOTLO: |
| 3319 | picrel->gothilo--; |
| 3320 | break; |
| 3321 | |
| 3322 | case R_BFIN_FUNCDESC_GOT17M4: |
| 3323 | picrel->fdgot17m4--; |
| 3324 | break; |
| 3325 | |
| 3326 | case R_BFIN_FUNCDESC_GOTHI: |
| 3327 | case R_BFIN_FUNCDESC_GOTLO: |
| 3328 | picrel->fdgothilo--; |
| 3329 | break; |
| 3330 | |
| 3331 | case R_BFIN_GOTOFF17M4: |
| 3332 | case R_BFIN_GOTOFFHI: |
| 3333 | case R_BFIN_GOTOFFLO: |
| 3334 | picrel->gotoff--; |
| 3335 | break; |
| 3336 | |
| 3337 | case R_BFIN_FUNCDESC_GOTOFF17M4: |
| 3338 | picrel->fdgoff17m4--; |
| 3339 | break; |
| 3340 | |
| 3341 | case R_BFIN_FUNCDESC_GOTOFFHI: |
| 3342 | case R_BFIN_FUNCDESC_GOTOFFLO: |
| 3343 | picrel->fdgoffhilo--; |
| 3344 | break; |
| 3345 | |
| 3346 | case R_BFIN_FUNCDESC: |
| 3347 | picrel->fd--; |
| 3348 | picrel->relocsfd--; |
| 3349 | break; |
| 3350 | |
| 3351 | default: |
| 3352 | break; |
| 3353 | } |
| 3354 | } |
| 3355 | |
| 3356 | return TRUE; |
| 3357 | } |
| 3358 | |
| 3359 | /* We need dynamic symbols for every section, since segments can |
| 3360 | relocate independently. */ |
| 3361 | static bfd_boolean |
| 3362 | _bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 3363 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 3364 | asection *p) |
| 3365 | { |
| 3366 | switch (elf_section_data (p)->this_hdr.sh_type) |
| 3367 | { |
| 3368 | case SHT_PROGBITS: |
| 3369 | case SHT_NOBITS: |
| 3370 | /* If sh_type is yet undecided, assume it could be |
| 3371 | SHT_PROGBITS/SHT_NOBITS. */ |
| 3372 | case SHT_NULL: |
| 3373 | return FALSE; |
| 3374 | |
| 3375 | /* There shouldn't be section relative relocations |
| 3376 | against any other section. */ |
| 3377 | default: |
| 3378 | return TRUE; |
| 3379 | } |
| 3380 | } |
| 3381 | |
| 3382 | /* Create a .got section, as well as its additional info field. This |
| 3383 | is almost entirely copied from |
| 3384 | elflink.c:_bfd_elf_create_got_section(). */ |
| 3385 | |
| 3386 | static bfd_boolean |
| 3387 | _bfin_create_got_section (bfd *abfd, struct bfd_link_info *info) |
| 3388 | { |
| 3389 | flagword flags, pltflags; |
| 3390 | asection *s; |
| 3391 | struct elf_link_hash_entry *h; |
| 3392 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 3393 | int ptralign; |
| 3394 | |
| 3395 | /* This function may be called more than once. */ |
| 3396 | s = bfd_get_linker_section (abfd, ".got"); |
| 3397 | if (s != NULL) |
| 3398 | return TRUE; |
| 3399 | |
| 3400 | /* Machine specific: although pointers are 32-bits wide, we want the |
| 3401 | GOT to be aligned to a 64-bit boundary, such that function |
| 3402 | descriptors in it can be accessed with 64-bit loads and |
| 3403 | stores. */ |
| 3404 | ptralign = 3; |
| 3405 | |
| 3406 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 3407 | | SEC_LINKER_CREATED); |
| 3408 | pltflags = flags; |
| 3409 | |
| 3410 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
| 3411 | if (s == NULL |
| 3412 | || !bfd_set_section_alignment (abfd, s, ptralign)) |
| 3413 | return FALSE; |
| 3414 | |
| 3415 | if (bed->want_got_plt) |
| 3416 | { |
| 3417 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); |
| 3418 | if (s == NULL |
| 3419 | || !bfd_set_section_alignment (abfd, s, ptralign)) |
| 3420 | return FALSE; |
| 3421 | } |
| 3422 | |
| 3423 | if (bed->want_got_sym) |
| 3424 | { |
| 3425 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got |
| 3426 | (or .got.plt) section. We don't do this in the linker script |
| 3427 | because we don't want to define the symbol if we are not creating |
| 3428 | a global offset table. */ |
| 3429 | h = _bfd_elf_define_linkage_sym (abfd, info, s, "__GLOBAL_OFFSET_TABLE_"); |
| 3430 | elf_hash_table (info)->hgot = h; |
| 3431 | if (h == NULL) |
| 3432 | return FALSE; |
| 3433 | |
| 3434 | /* Machine-specific: we want the symbol for executables as |
| 3435 | well. */ |
| 3436 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 3437 | return FALSE; |
| 3438 | } |
| 3439 | |
| 3440 | /* The first bit of the global offset table is the header. */ |
| 3441 | s->size += bed->got_header_size; |
| 3442 | |
| 3443 | /* This is the machine-specific part. Create and initialize section |
| 3444 | data for the got. */ |
| 3445 | if (IS_FDPIC (abfd)) |
| 3446 | { |
| 3447 | bfinfdpic_got_section (info) = s; |
| 3448 | bfinfdpic_relocs_info (info) = htab_try_create (1, |
| 3449 | bfinfdpic_relocs_info_hash, |
| 3450 | bfinfdpic_relocs_info_eq, |
| 3451 | (htab_del) NULL); |
| 3452 | if (! bfinfdpic_relocs_info (info)) |
| 3453 | return FALSE; |
| 3454 | |
| 3455 | s = bfd_make_section_anyway_with_flags (abfd, ".rel.got", |
| 3456 | (flags | SEC_READONLY)); |
| 3457 | if (s == NULL |
| 3458 | || ! bfd_set_section_alignment (abfd, s, 2)) |
| 3459 | return FALSE; |
| 3460 | |
| 3461 | bfinfdpic_gotrel_section (info) = s; |
| 3462 | |
| 3463 | /* Machine-specific. */ |
| 3464 | s = bfd_make_section_anyway_with_flags (abfd, ".rofixup", |
| 3465 | (flags | SEC_READONLY)); |
| 3466 | if (s == NULL |
| 3467 | || ! bfd_set_section_alignment (abfd, s, 2)) |
| 3468 | return FALSE; |
| 3469 | |
| 3470 | bfinfdpic_gotfixup_section (info) = s; |
| 3471 | } |
| 3472 | |
| 3473 | pltflags |= SEC_CODE; |
| 3474 | if (bed->plt_not_loaded) |
| 3475 | pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS); |
| 3476 | if (bed->plt_readonly) |
| 3477 | pltflags |= SEC_READONLY; |
| 3478 | |
| 3479 | s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); |
| 3480 | if (s == NULL |
| 3481 | || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) |
| 3482 | return FALSE; |
| 3483 | /* Blackfin-specific: remember it. */ |
| 3484 | bfinfdpic_plt_section (info) = s; |
| 3485 | |
| 3486 | if (bed->want_plt_sym) |
| 3487 | { |
| 3488 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
| 3489 | .plt section. */ |
| 3490 | struct bfd_link_hash_entry *bh = NULL; |
| 3491 | |
| 3492 | if (! (_bfd_generic_link_add_one_symbol |
| 3493 | (info, abfd, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL, |
| 3494 | FALSE, get_elf_backend_data (abfd)->collect, &bh))) |
| 3495 | return FALSE; |
| 3496 | h = (struct elf_link_hash_entry *) bh; |
| 3497 | h->def_regular = 1; |
| 3498 | h->type = STT_OBJECT; |
| 3499 | |
| 3500 | if (! info->executable |
| 3501 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 3502 | return FALSE; |
| 3503 | } |
| 3504 | |
| 3505 | /* Blackfin-specific: we want rel relocations for the plt. */ |
| 3506 | s = bfd_make_section_anyway_with_flags (abfd, ".rel.plt", |
| 3507 | flags | SEC_READONLY); |
| 3508 | if (s == NULL |
| 3509 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
| 3510 | return FALSE; |
| 3511 | /* Blackfin-specific: remember it. */ |
| 3512 | bfinfdpic_pltrel_section (info) = s; |
| 3513 | |
| 3514 | return TRUE; |
| 3515 | } |
| 3516 | |
| 3517 | /* Make sure the got and plt sections exist, and that our pointers in |
| 3518 | the link hash table point to them. */ |
| 3519 | |
| 3520 | static bfd_boolean |
| 3521 | elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
| 3522 | { |
| 3523 | /* This is mostly copied from |
| 3524 | elflink.c:_bfd_elf_create_dynamic_sections(). */ |
| 3525 | flagword flags; |
| 3526 | asection *s; |
| 3527 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 3528 | |
| 3529 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 3530 | | SEC_LINKER_CREATED); |
| 3531 | |
| 3532 | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and |
| 3533 | .rel[a].bss sections. */ |
| 3534 | |
| 3535 | /* Blackfin-specific: we want to create the GOT in the Blackfin way. */ |
| 3536 | if (! _bfin_create_got_section (abfd, info)) |
| 3537 | return FALSE; |
| 3538 | |
| 3539 | /* Blackfin-specific: make sure we created everything we wanted. */ |
| 3540 | BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info) |
| 3541 | /* && bfinfdpic_gotfixup_section (info) */ |
| 3542 | && bfinfdpic_plt_section (info) |
| 3543 | && bfinfdpic_pltrel_section (info)); |
| 3544 | |
| 3545 | if (bed->want_dynbss) |
| 3546 | { |
| 3547 | /* The .dynbss section is a place to put symbols which are defined |
| 3548 | by dynamic objects, are referenced by regular objects, and are |
| 3549 | not functions. We must allocate space for them in the process |
| 3550 | image and use a R_*_COPY reloc to tell the dynamic linker to |
| 3551 | initialize them at run time. The linker script puts the .dynbss |
| 3552 | section into the .bss section of the final image. */ |
| 3553 | s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", |
| 3554 | SEC_ALLOC | SEC_LINKER_CREATED); |
| 3555 | if (s == NULL) |
| 3556 | return FALSE; |
| 3557 | |
| 3558 | /* The .rel[a].bss section holds copy relocs. This section is not |
| 3559 | normally needed. We need to create it here, though, so that the |
| 3560 | linker will map it to an output section. We can't just create it |
| 3561 | only if we need it, because we will not know whether we need it |
| 3562 | until we have seen all the input files, and the first time the |
| 3563 | main linker code calls BFD after examining all the input files |
| 3564 | (size_dynamic_sections) the input sections have already been |
| 3565 | mapped to the output sections. If the section turns out not to |
| 3566 | be needed, we can discard it later. We will never need this |
| 3567 | section when generating a shared object, since they do not use |
| 3568 | copy relocs. */ |
| 3569 | if (! info->shared) |
| 3570 | { |
| 3571 | s = bfd_make_section_anyway_with_flags (abfd, |
| 3572 | ".rela.bss", |
| 3573 | flags | SEC_READONLY); |
| 3574 | if (s == NULL |
| 3575 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
| 3576 | return FALSE; |
| 3577 | } |
| 3578 | } |
| 3579 | |
| 3580 | return TRUE; |
| 3581 | } |
| 3582 | |
| 3583 | /* Compute the total GOT size required by each symbol in each range. |
| 3584 | Symbols may require up to 4 words in the GOT: an entry pointing to |
| 3585 | the symbol, an entry pointing to its function descriptor, and a |
| 3586 | private function descriptors taking two words. */ |
| 3587 | |
| 3588 | static void |
| 3589 | _bfinfdpic_count_nontls_entries (struct bfinfdpic_relocs_info *entry, |
| 3590 | struct _bfinfdpic_dynamic_got_info *dinfo) |
| 3591 | { |
| 3592 | /* Allocate space for a GOT entry pointing to the symbol. */ |
| 3593 | if (entry->got17m4) |
| 3594 | dinfo->got17m4 += 4; |
| 3595 | else if (entry->gothilo) |
| 3596 | dinfo->gothilo += 4; |
| 3597 | else |
| 3598 | entry->relocs32--; |
| 3599 | entry->relocs32++; |
| 3600 | |
| 3601 | /* Allocate space for a GOT entry pointing to the function |
| 3602 | descriptor. */ |
| 3603 | if (entry->fdgot17m4) |
| 3604 | dinfo->got17m4 += 4; |
| 3605 | else if (entry->fdgothilo) |
| 3606 | dinfo->gothilo += 4; |
| 3607 | else |
| 3608 | entry->relocsfd--; |
| 3609 | entry->relocsfd++; |
| 3610 | |
| 3611 | /* Decide whether we need a PLT entry, a function descriptor in the |
| 3612 | GOT, and a lazy PLT entry for this symbol. */ |
| 3613 | entry->plt = entry->call |
| 3614 | && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h) |
| 3615 | && elf_hash_table (dinfo->info)->dynamic_sections_created; |
| 3616 | entry->privfd = entry->plt |
| 3617 | || entry->fdgoff17m4 || entry->fdgoffhilo |
| 3618 | || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo) |
| 3619 | && (entry->symndx != -1 |
| 3620 | || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))); |
| 3621 | entry->lazyplt = entry->privfd |
| 3622 | && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h) |
| 3623 | && ! (dinfo->info->flags & DF_BIND_NOW) |
| 3624 | && elf_hash_table (dinfo->info)->dynamic_sections_created; |
| 3625 | |
| 3626 | /* Allocate space for a function descriptor. */ |
| 3627 | if (entry->fdgoff17m4) |
| 3628 | dinfo->fd17m4 += 8; |
| 3629 | else if (entry->privfd && entry->plt) |
| 3630 | dinfo->fdplt += 8; |
| 3631 | else if (entry->privfd) |
| 3632 | dinfo->fdhilo += 8; |
| 3633 | else |
| 3634 | entry->relocsfdv--; |
| 3635 | entry->relocsfdv++; |
| 3636 | |
| 3637 | if (entry->lazyplt) |
| 3638 | dinfo->lzplt += LZPLT_NORMAL_SIZE; |
| 3639 | } |
| 3640 | |
| 3641 | /* Compute the number of dynamic relocations and fixups that a symbol |
| 3642 | requires, and add (or subtract) from the grand and per-symbol |
| 3643 | totals. */ |
| 3644 | |
| 3645 | static void |
| 3646 | _bfinfdpic_count_relocs_fixups (struct bfinfdpic_relocs_info *entry, |
| 3647 | struct _bfinfdpic_dynamic_got_info *dinfo, |
| 3648 | bfd_boolean subtract) |
| 3649 | { |
| 3650 | bfd_vma relocs = 0, fixups = 0; |
| 3651 | |
| 3652 | if (!dinfo->info->executable || dinfo->info->pie) |
| 3653 | relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv; |
| 3654 | else |
| 3655 | { |
| 3656 | if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)) |
| 3657 | { |
| 3658 | if (entry->symndx != -1 |
| 3659 | || entry->d.h->root.type != bfd_link_hash_undefweak) |
| 3660 | fixups += entry->relocs32 + 2 * entry->relocsfdv; |
| 3661 | } |
| 3662 | else |
| 3663 | relocs += entry->relocs32 + entry->relocsfdv; |
| 3664 | |
| 3665 | if (entry->symndx != -1 |
| 3666 | || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)) |
| 3667 | { |
| 3668 | if (entry->symndx != -1 |
| 3669 | || entry->d.h->root.type != bfd_link_hash_undefweak) |
| 3670 | fixups += entry->relocsfd; |
| 3671 | } |
| 3672 | else |
| 3673 | relocs += entry->relocsfd; |
| 3674 | } |
| 3675 | |
| 3676 | if (subtract) |
| 3677 | { |
| 3678 | relocs = - relocs; |
| 3679 | fixups = - fixups; |
| 3680 | } |
| 3681 | |
| 3682 | entry->dynrelocs += relocs; |
| 3683 | entry->fixups += fixups; |
| 3684 | dinfo->relocs += relocs; |
| 3685 | dinfo->fixups += fixups; |
| 3686 | } |
| 3687 | |
| 3688 | /* Compute the total GOT and PLT size required by each symbol in each range. * |
| 3689 | Symbols may require up to 4 words in the GOT: an entry pointing to |
| 3690 | the symbol, an entry pointing to its function descriptor, and a |
| 3691 | private function descriptors taking two words. */ |
| 3692 | |
| 3693 | static int |
| 3694 | _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_) |
| 3695 | { |
| 3696 | struct bfinfdpic_relocs_info *entry = *entryp; |
| 3697 | struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_; |
| 3698 | |
| 3699 | _bfinfdpic_count_nontls_entries (entry, dinfo); |
| 3700 | |
| 3701 | _bfinfdpic_count_relocs_fixups (entry, dinfo, FALSE); |
| 3702 | |
| 3703 | return 1; |
| 3704 | } |
| 3705 | |
| 3706 | /* This structure is used to assign offsets to got entries, function |
| 3707 | descriptors, plt entries and lazy plt entries. */ |
| 3708 | |
| 3709 | struct _bfinfdpic_dynamic_got_plt_info |
| 3710 | { |
| 3711 | /* Summary information collected with _bfinfdpic_count_got_plt_entries. */ |
| 3712 | struct _bfinfdpic_dynamic_got_info g; |
| 3713 | |
| 3714 | /* For each addressable range, we record a MAX (positive) and MIN |
| 3715 | (negative) value. CUR is used to assign got entries, and it's |
| 3716 | incremented from an initial positive value to MAX, then from MIN |
| 3717 | to FDCUR (unless FDCUR wraps around first). FDCUR is used to |
| 3718 | assign function descriptors, and it's decreased from an initial |
| 3719 | non-positive value to MIN, then from MAX down to CUR (unless CUR |
| 3720 | wraps around first). All of MIN, MAX, CUR and FDCUR always point |
| 3721 | to even words. ODD, if non-zero, indicates an odd word to be |
| 3722 | used for the next got entry, otherwise CUR is used and |
| 3723 | incremented by a pair of words, wrapping around when it reaches |
| 3724 | MAX. FDCUR is decremented (and wrapped) before the next function |
| 3725 | descriptor is chosen. FDPLT indicates the number of remaining |
| 3726 | slots that can be used for function descriptors used only by PLT |
| 3727 | entries. */ |
| 3728 | struct _bfinfdpic_dynamic_got_alloc_data |
| 3729 | { |
| 3730 | bfd_signed_vma max, cur, odd, fdcur, min; |
| 3731 | bfd_vma fdplt; |
| 3732 | } got17m4, gothilo; |
| 3733 | }; |
| 3734 | |
| 3735 | /* Determine the positive and negative ranges to be used by each |
| 3736 | offset range in the GOT. FDCUR and CUR, that must be aligned to a |
| 3737 | double-word boundary, are the minimum (negative) and maximum |
| 3738 | (positive) GOT offsets already used by previous ranges, except for |
| 3739 | an ODD entry that may have been left behind. GOT and FD indicate |
| 3740 | the size of GOT entries and function descriptors that must be |
| 3741 | placed within the range from -WRAP to WRAP. If there's room left, |
| 3742 | up to FDPLT bytes should be reserved for additional function |
| 3743 | descriptors. */ |
| 3744 | |
| 3745 | inline static bfd_signed_vma |
| 3746 | _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad, |
| 3747 | bfd_signed_vma fdcur, |
| 3748 | bfd_signed_vma odd, |
| 3749 | bfd_signed_vma cur, |
| 3750 | bfd_vma got, |
| 3751 | bfd_vma fd, |
| 3752 | bfd_vma fdplt, |
| 3753 | bfd_vma wrap) |
| 3754 | { |
| 3755 | bfd_signed_vma wrapmin = -wrap; |
| 3756 | |
| 3757 | /* Start at the given initial points. */ |
| 3758 | gad->fdcur = fdcur; |
| 3759 | gad->cur = cur; |
| 3760 | |
| 3761 | /* If we had an incoming odd word and we have any got entries that |
| 3762 | are going to use it, consume it, otherwise leave gad->odd at |
| 3763 | zero. We might force gad->odd to zero and return the incoming |
| 3764 | odd such that it is used by the next range, but then GOT entries |
| 3765 | might appear to be out of order and we wouldn't be able to |
| 3766 | shorten the GOT by one word if it turns out to end with an |
| 3767 | unpaired GOT entry. */ |
| 3768 | if (odd && got) |
| 3769 | { |
| 3770 | gad->odd = odd; |
| 3771 | got -= 4; |
| 3772 | odd = 0; |
| 3773 | } |
| 3774 | else |
| 3775 | gad->odd = 0; |
| 3776 | |
| 3777 | /* If we're left with an unpaired GOT entry, compute its location |
| 3778 | such that we can return it. Otherwise, if got doesn't require an |
| 3779 | odd number of words here, either odd was already zero in the |
| 3780 | block above, or it was set to zero because got was non-zero, or |
| 3781 | got was already zero. In the latter case, we want the value of |
| 3782 | odd to carry over to the return statement, so we don't want to |
| 3783 | reset odd unless the condition below is true. */ |
| 3784 | if (got & 4) |
| 3785 | { |
| 3786 | odd = cur + got; |
| 3787 | got += 4; |
| 3788 | } |
| 3789 | |
| 3790 | /* Compute the tentative boundaries of this range. */ |
| 3791 | gad->max = cur + got; |
| 3792 | gad->min = fdcur - fd; |
| 3793 | gad->fdplt = 0; |
| 3794 | |
| 3795 | /* If function descriptors took too much space, wrap some of them |
| 3796 | around. */ |
| 3797 | if (gad->min < wrapmin) |
| 3798 | { |
| 3799 | gad->max += wrapmin - gad->min; |
| 3800 | gad->min = wrapmin; |
| 3801 | } |
| 3802 | /* If there is space left and we have function descriptors |
| 3803 | referenced in PLT entries that could take advantage of shorter |
| 3804 | offsets, place them here. */ |
| 3805 | else if (fdplt && gad->min > wrapmin) |
| 3806 | { |
| 3807 | bfd_vma fds; |
| 3808 | if ((bfd_vma) (gad->min - wrapmin) < fdplt) |
| 3809 | fds = gad->min - wrapmin; |
| 3810 | else |
| 3811 | fds = fdplt; |
| 3812 | |
| 3813 | fdplt -= fds; |
| 3814 | gad->min -= fds; |
| 3815 | gad->fdplt += fds; |
| 3816 | } |
| 3817 | |
| 3818 | /* If GOT entries took too much space, wrap some of them around. |
| 3819 | This may well cause gad->min to become lower than wrapmin. This |
| 3820 | will cause a relocation overflow later on, so we don't have to |
| 3821 | report it here . */ |
| 3822 | if ((bfd_vma) gad->max > wrap) |
| 3823 | { |
| 3824 | gad->min -= gad->max - wrap; |
| 3825 | gad->max = wrap; |
| 3826 | } |
| 3827 | /* If there is more space left, try to place some more function |
| 3828 | descriptors for PLT entries. */ |
| 3829 | else if (fdplt && (bfd_vma) gad->max < wrap) |
| 3830 | { |
| 3831 | bfd_vma fds; |
| 3832 | if ((bfd_vma) (wrap - gad->max) < fdplt) |
| 3833 | fds = wrap - gad->max; |
| 3834 | else |
| 3835 | fds = fdplt; |
| 3836 | |
| 3837 | fdplt -= fds; |
| 3838 | gad->max += fds; |
| 3839 | gad->fdplt += fds; |
| 3840 | } |
| 3841 | |
| 3842 | /* If odd was initially computed as an offset past the wrap point, |
| 3843 | wrap it around. */ |
| 3844 | if (odd > gad->max) |
| 3845 | odd = gad->min + odd - gad->max; |
| 3846 | |
| 3847 | /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed |
| 3848 | before returning, so do it here too. This guarantees that, |
| 3849 | should cur and fdcur meet at the wrap point, they'll both be |
| 3850 | equal to min. */ |
| 3851 | if (gad->cur == gad->max) |
| 3852 | gad->cur = gad->min; |
| 3853 | |
| 3854 | return odd; |
| 3855 | } |
| 3856 | |
| 3857 | /* Compute the location of the next GOT entry, given the allocation |
| 3858 | data for a range. */ |
| 3859 | |
| 3860 | inline static bfd_signed_vma |
| 3861 | _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad) |
| 3862 | { |
| 3863 | bfd_signed_vma ret; |
| 3864 | |
| 3865 | if (gad->odd) |
| 3866 | { |
| 3867 | /* If there was an odd word left behind, use it. */ |
| 3868 | ret = gad->odd; |
| 3869 | gad->odd = 0; |
| 3870 | } |
| 3871 | else |
| 3872 | { |
| 3873 | /* Otherwise, use the word pointed to by cur, reserve the next |
| 3874 | as an odd word, and skip to the next pair of words, possibly |
| 3875 | wrapping around. */ |
| 3876 | ret = gad->cur; |
| 3877 | gad->odd = gad->cur + 4; |
| 3878 | gad->cur += 8; |
| 3879 | if (gad->cur == gad->max) |
| 3880 | gad->cur = gad->min; |
| 3881 | } |
| 3882 | |
| 3883 | return ret; |
| 3884 | } |
| 3885 | |
| 3886 | /* Compute the location of the next function descriptor entry in the |
| 3887 | GOT, given the allocation data for a range. */ |
| 3888 | |
| 3889 | inline static bfd_signed_vma |
| 3890 | _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad) |
| 3891 | { |
| 3892 | /* If we're at the bottom, wrap around, and only then allocate the |
| 3893 | next pair of words. */ |
| 3894 | if (gad->fdcur == gad->min) |
| 3895 | gad->fdcur = gad->max; |
| 3896 | return gad->fdcur -= 8; |
| 3897 | } |
| 3898 | |
| 3899 | /* Assign GOT offsets for every GOT entry and function descriptor. |
| 3900 | Doing everything in a single pass is tricky. */ |
| 3901 | |
| 3902 | static int |
| 3903 | _bfinfdpic_assign_got_entries (void **entryp, void *info_) |
| 3904 | { |
| 3905 | struct bfinfdpic_relocs_info *entry = *entryp; |
| 3906 | struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_; |
| 3907 | |
| 3908 | if (entry->got17m4) |
| 3909 | entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4); |
| 3910 | else if (entry->gothilo) |
| 3911 | entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo); |
| 3912 | |
| 3913 | if (entry->fdgot17m4) |
| 3914 | entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4); |
| 3915 | else if (entry->fdgothilo) |
| 3916 | entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo); |
| 3917 | |
| 3918 | if (entry->fdgoff17m4) |
| 3919 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4); |
| 3920 | else if (entry->plt && dinfo->got17m4.fdplt) |
| 3921 | { |
| 3922 | dinfo->got17m4.fdplt -= 8; |
| 3923 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4); |
| 3924 | } |
| 3925 | else if (entry->plt) |
| 3926 | { |
| 3927 | dinfo->gothilo.fdplt -= 8; |
| 3928 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo); |
| 3929 | } |
| 3930 | else if (entry->privfd) |
| 3931 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo); |
| 3932 | |
| 3933 | return 1; |
| 3934 | } |
| 3935 | |
| 3936 | /* Assign GOT offsets to private function descriptors used by PLT |
| 3937 | entries (or referenced by 32-bit offsets), as well as PLT entries |
| 3938 | and lazy PLT entries. */ |
| 3939 | |
| 3940 | static int |
| 3941 | _bfinfdpic_assign_plt_entries (void **entryp, void *info_) |
| 3942 | { |
| 3943 | struct bfinfdpic_relocs_info *entry = *entryp; |
| 3944 | struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_; |
| 3945 | |
| 3946 | /* If this symbol requires a local function descriptor, allocate |
| 3947 | one. */ |
| 3948 | if (entry->privfd && entry->fd_entry == 0) |
| 3949 | { |
| 3950 | if (dinfo->got17m4.fdplt) |
| 3951 | { |
| 3952 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4); |
| 3953 | dinfo->got17m4.fdplt -= 8; |
| 3954 | } |
| 3955 | else |
| 3956 | { |
| 3957 | BFD_ASSERT (dinfo->gothilo.fdplt); |
| 3958 | entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo); |
| 3959 | dinfo->gothilo.fdplt -= 8; |
| 3960 | } |
| 3961 | } |
| 3962 | |
| 3963 | if (entry->plt) |
| 3964 | { |
| 3965 | int size; |
| 3966 | |
| 3967 | /* We use the section's raw size to mark the location of the |
| 3968 | next PLT entry. */ |
| 3969 | entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size; |
| 3970 | |
| 3971 | /* Figure out the length of this PLT entry based on the |
| 3972 | addressing mode we need to reach the function descriptor. */ |
| 3973 | BFD_ASSERT (entry->fd_entry); |
| 3974 | if (entry->fd_entry >= -(1 << (18 - 1)) |
| 3975 | && entry->fd_entry + 4 < (1 << (18 - 1))) |
| 3976 | size = 10; |
| 3977 | else |
| 3978 | size = 16; |
| 3979 | |
| 3980 | bfinfdpic_plt_section (dinfo->g.info)->size += size; |
| 3981 | } |
| 3982 | |
| 3983 | if (entry->lazyplt) |
| 3984 | { |
| 3985 | entry->lzplt_entry = dinfo->g.lzplt; |
| 3986 | dinfo->g.lzplt += LZPLT_NORMAL_SIZE; |
| 3987 | /* If this entry is the one that gets the resolver stub, account |
| 3988 | for the additional instruction. */ |
| 3989 | if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE |
| 3990 | == BFINFDPIC_LZPLT_RESOLV_LOC) |
| 3991 | dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA; |
| 3992 | } |
| 3993 | |
| 3994 | return 1; |
| 3995 | } |
| 3996 | |
| 3997 | /* Cancel out any effects of calling _bfinfdpic_assign_got_entries and |
| 3998 | _bfinfdpic_assign_plt_entries. */ |
| 3999 | |
| 4000 | static int |
| 4001 | _bfinfdpic_reset_got_plt_entries (void **entryp, void *ignore ATTRIBUTE_UNUSED) |
| 4002 | { |
| 4003 | struct bfinfdpic_relocs_info *entry = *entryp; |
| 4004 | |
| 4005 | entry->got_entry = 0; |
| 4006 | entry->fdgot_entry = 0; |
| 4007 | entry->fd_entry = 0; |
| 4008 | entry->plt_entry = (bfd_vma)-1; |
| 4009 | entry->lzplt_entry = (bfd_vma)-1; |
| 4010 | |
| 4011 | return 1; |
| 4012 | } |
| 4013 | |
| 4014 | /* Follow indirect and warning hash entries so that each got entry |
| 4015 | points to the final symbol definition. P must point to a pointer |
| 4016 | to the hash table we're traversing. Since this traversal may |
| 4017 | modify the hash table, we set this pointer to NULL to indicate |
| 4018 | we've made a potentially-destructive change to the hash table, so |
| 4019 | the traversal must be restarted. */ |
| 4020 | static int |
| 4021 | _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p) |
| 4022 | { |
| 4023 | struct bfinfdpic_relocs_info *entry = *entryp; |
| 4024 | htab_t *htab = p; |
| 4025 | |
| 4026 | if (entry->symndx == -1) |
| 4027 | { |
| 4028 | struct elf_link_hash_entry *h = entry->d.h; |
| 4029 | struct bfinfdpic_relocs_info *oentry; |
| 4030 | |
| 4031 | while (h->root.type == bfd_link_hash_indirect |
| 4032 | || h->root.type == bfd_link_hash_warning) |
| 4033 | h = (struct elf_link_hash_entry *)h->root.u.i.link; |
| 4034 | |
| 4035 | if (entry->d.h == h) |
| 4036 | return 1; |
| 4037 | |
| 4038 | oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend, |
| 4039 | NO_INSERT); |
| 4040 | |
| 4041 | if (oentry) |
| 4042 | { |
| 4043 | /* Merge the two entries. */ |
| 4044 | bfinfdpic_pic_merge_early_relocs_info (oentry, entry); |
| 4045 | htab_clear_slot (*htab, entryp); |
| 4046 | return 1; |
| 4047 | } |
| 4048 | |
| 4049 | entry->d.h = h; |
| 4050 | |
| 4051 | /* If we can't find this entry with the new bfd hash, re-insert |
| 4052 | it, and get the traversal restarted. */ |
| 4053 | if (! htab_find (*htab, entry)) |
| 4054 | { |
| 4055 | htab_clear_slot (*htab, entryp); |
| 4056 | entryp = htab_find_slot (*htab, entry, INSERT); |
| 4057 | if (! *entryp) |
| 4058 | *entryp = entry; |
| 4059 | /* Abort the traversal, since the whole table may have |
| 4060 | moved, and leave it up to the parent to restart the |
| 4061 | process. */ |
| 4062 | *(htab_t *)p = NULL; |
| 4063 | return 0; |
| 4064 | } |
| 4065 | } |
| 4066 | |
| 4067 | return 1; |
| 4068 | } |
| 4069 | |
| 4070 | /* Compute the total size of the GOT, the PLT, the dynamic relocations |
| 4071 | section and the rofixup section. Assign locations for GOT and PLT |
| 4072 | entries. */ |
| 4073 | |
| 4074 | static bfd_boolean |
| 4075 | _bfinfdpic_size_got_plt (bfd *output_bfd, |
| 4076 | struct _bfinfdpic_dynamic_got_plt_info *gpinfop) |
| 4077 | { |
| 4078 | bfd_signed_vma odd; |
| 4079 | bfd_vma limit; |
| 4080 | struct bfd_link_info *info = gpinfop->g.info; |
| 4081 | bfd *dynobj = elf_hash_table (info)->dynobj; |
| 4082 | |
| 4083 | memcpy (bfinfdpic_dynamic_got_plt_info (info), &gpinfop->g, |
| 4084 | sizeof (gpinfop->g)); |
| 4085 | |
| 4086 | odd = 12; |
| 4087 | /* Compute the total size taken by entries in the 18-bit range, |
| 4088 | to tell how many PLT function descriptors we can bring into it |
| 4089 | without causing it to overflow. */ |
| 4090 | limit = odd + gpinfop->g.got17m4 + gpinfop->g.fd17m4; |
| 4091 | if (limit < (bfd_vma)1 << 18) |
| 4092 | limit = ((bfd_vma)1 << 18) - limit; |
| 4093 | else |
| 4094 | limit = 0; |
| 4095 | if (gpinfop->g.fdplt < limit) |
| 4096 | limit = gpinfop->g.fdplt; |
| 4097 | |
| 4098 | /* Determine the ranges of GOT offsets that we can use for each |
| 4099 | range of addressing modes. */ |
| 4100 | odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->got17m4, |
| 4101 | 0, |
| 4102 | odd, |
| 4103 | 16, |
| 4104 | gpinfop->g.got17m4, |
| 4105 | gpinfop->g.fd17m4, |
| 4106 | limit, |
| 4107 | (bfd_vma)1 << (18-1)); |
| 4108 | odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->gothilo, |
| 4109 | gpinfop->got17m4.min, |
| 4110 | odd, |
| 4111 | gpinfop->got17m4.max, |
| 4112 | gpinfop->g.gothilo, |
| 4113 | gpinfop->g.fdhilo, |
| 4114 | gpinfop->g.fdplt - gpinfop->got17m4.fdplt, |
| 4115 | (bfd_vma)1 << (32-1)); |
| 4116 | |
| 4117 | /* Now assign (most) GOT offsets. */ |
| 4118 | htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries, |
| 4119 | gpinfop); |
| 4120 | |
| 4121 | bfinfdpic_got_section (info)->size = gpinfop->gothilo.max |
| 4122 | - gpinfop->gothilo.min |
| 4123 | /* If an odd word is the last word of the GOT, we don't need this |
| 4124 | word to be part of the GOT. */ |
| 4125 | - (odd + 4 == gpinfop->gothilo.max ? 4 : 0); |
| 4126 | if (bfinfdpic_got_section (info)->size == 0) |
| 4127 | bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE; |
| 4128 | else if (bfinfdpic_got_section (info)->size == 12 |
| 4129 | && ! elf_hash_table (info)->dynamic_sections_created) |
| 4130 | { |
| 4131 | bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE; |
| 4132 | bfinfdpic_got_section (info)->size = 0; |
| 4133 | } |
| 4134 | else |
| 4135 | { |
| 4136 | bfinfdpic_got_section (info)->contents = |
| 4137 | (bfd_byte *) bfd_zalloc (dynobj, |
| 4138 | bfinfdpic_got_section (info)->size); |
| 4139 | if (bfinfdpic_got_section (info)->contents == NULL) |
| 4140 | return FALSE; |
| 4141 | } |
| 4142 | |
| 4143 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4144 | /* Subtract the number of lzplt entries, since those will generate |
| 4145 | relocations in the pltrel section. */ |
| 4146 | bfinfdpic_gotrel_section (info)->size = |
| 4147 | (gpinfop->g.relocs - gpinfop->g.lzplt / LZPLT_NORMAL_SIZE) |
| 4148 | * get_elf_backend_data (output_bfd)->s->sizeof_rel; |
| 4149 | else |
| 4150 | BFD_ASSERT (gpinfop->g.relocs == 0); |
| 4151 | if (bfinfdpic_gotrel_section (info)->size == 0) |
| 4152 | bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE; |
| 4153 | else |
| 4154 | { |
| 4155 | bfinfdpic_gotrel_section (info)->contents = |
| 4156 | (bfd_byte *) bfd_zalloc (dynobj, |
| 4157 | bfinfdpic_gotrel_section (info)->size); |
| 4158 | if (bfinfdpic_gotrel_section (info)->contents == NULL) |
| 4159 | return FALSE; |
| 4160 | } |
| 4161 | |
| 4162 | bfinfdpic_gotfixup_section (info)->size = (gpinfop->g.fixups + 1) * 4; |
| 4163 | if (bfinfdpic_gotfixup_section (info)->size == 0) |
| 4164 | bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE; |
| 4165 | else |
| 4166 | { |
| 4167 | bfinfdpic_gotfixup_section (info)->contents = |
| 4168 | (bfd_byte *) bfd_zalloc (dynobj, |
| 4169 | bfinfdpic_gotfixup_section (info)->size); |
| 4170 | if (bfinfdpic_gotfixup_section (info)->contents == NULL) |
| 4171 | return FALSE; |
| 4172 | } |
| 4173 | |
| 4174 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4175 | bfinfdpic_pltrel_section (info)->size = |
| 4176 | gpinfop->g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel; |
| 4177 | if (bfinfdpic_pltrel_section (info)->size == 0) |
| 4178 | bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE; |
| 4179 | else |
| 4180 | { |
| 4181 | bfinfdpic_pltrel_section (info)->contents = |
| 4182 | (bfd_byte *) bfd_zalloc (dynobj, |
| 4183 | bfinfdpic_pltrel_section (info)->size); |
| 4184 | if (bfinfdpic_pltrel_section (info)->contents == NULL) |
| 4185 | return FALSE; |
| 4186 | } |
| 4187 | |
| 4188 | /* Add 4 bytes for every block of at most 65535 lazy PLT entries, |
| 4189 | such that there's room for the additional instruction needed to |
| 4190 | call the resolver. Since _bfinfdpic_assign_got_entries didn't |
| 4191 | account for them, our block size is 4 bytes smaller than the real |
| 4192 | block size. */ |
| 4193 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4194 | { |
| 4195 | bfinfdpic_plt_section (info)->size = gpinfop->g.lzplt |
| 4196 | + ((gpinfop->g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE) |
| 4197 | / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA); |
| 4198 | } |
| 4199 | |
| 4200 | /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to |
| 4201 | actually assign lazy PLT entries addresses. */ |
| 4202 | gpinfop->g.lzplt = 0; |
| 4203 | |
| 4204 | /* Save information that we're going to need to generate GOT and PLT |
| 4205 | entries. */ |
| 4206 | bfinfdpic_got_initial_offset (info) = -gpinfop->gothilo.min; |
| 4207 | |
| 4208 | if (get_elf_backend_data (output_bfd)->want_got_sym) |
| 4209 | elf_hash_table (info)->hgot->root.u.def.value |
| 4210 | = bfinfdpic_got_initial_offset (info); |
| 4211 | |
| 4212 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4213 | bfinfdpic_plt_initial_offset (info) = |
| 4214 | bfinfdpic_plt_section (info)->size; |
| 4215 | |
| 4216 | htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries, |
| 4217 | gpinfop); |
| 4218 | |
| 4219 | /* Allocate the PLT section contents only after |
| 4220 | _bfinfdpic_assign_plt_entries has a chance to add the size of the |
| 4221 | non-lazy PLT entries. */ |
| 4222 | if (bfinfdpic_plt_section (info)->size == 0) |
| 4223 | bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE; |
| 4224 | else |
| 4225 | { |
| 4226 | bfinfdpic_plt_section (info)->contents = |
| 4227 | (bfd_byte *) bfd_zalloc (dynobj, |
| 4228 | bfinfdpic_plt_section (info)->size); |
| 4229 | if (bfinfdpic_plt_section (info)->contents == NULL) |
| 4230 | return FALSE; |
| 4231 | } |
| 4232 | |
| 4233 | return TRUE; |
| 4234 | } |
| 4235 | |
| 4236 | /* Set the sizes of the dynamic sections. */ |
| 4237 | |
| 4238 | static bfd_boolean |
| 4239 | elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd, |
| 4240 | struct bfd_link_info *info) |
| 4241 | { |
| 4242 | struct elf_link_hash_table *htab; |
| 4243 | bfd *dynobj; |
| 4244 | asection *s; |
| 4245 | struct _bfinfdpic_dynamic_got_plt_info gpinfo; |
| 4246 | |
| 4247 | htab = elf_hash_table (info); |
| 4248 | dynobj = htab->dynobj; |
| 4249 | BFD_ASSERT (dynobj != NULL); |
| 4250 | |
| 4251 | if (htab->dynamic_sections_created) |
| 4252 | { |
| 4253 | /* Set the contents of the .interp section to the interpreter. */ |
| 4254 | if (info->executable) |
| 4255 | { |
| 4256 | s = bfd_get_linker_section (dynobj, ".interp"); |
| 4257 | BFD_ASSERT (s != NULL); |
| 4258 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 4259 | s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER; |
| 4260 | } |
| 4261 | } |
| 4262 | |
| 4263 | memset (&gpinfo, 0, sizeof (gpinfo)); |
| 4264 | gpinfo.g.info = info; |
| 4265 | |
| 4266 | for (;;) |
| 4267 | { |
| 4268 | htab_t relocs = bfinfdpic_relocs_info (info); |
| 4269 | |
| 4270 | htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs); |
| 4271 | |
| 4272 | if (relocs == bfinfdpic_relocs_info (info)) |
| 4273 | break; |
| 4274 | } |
| 4275 | |
| 4276 | htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries, |
| 4277 | &gpinfo.g); |
| 4278 | |
| 4279 | /* Allocate space to save the summary information, we're going to |
| 4280 | use it if we're doing relaxations. */ |
| 4281 | bfinfdpic_dynamic_got_plt_info (info) = bfd_alloc (dynobj, sizeof (gpinfo.g)); |
| 4282 | |
| 4283 | if (!_bfinfdpic_size_got_plt (output_bfd, &gpinfo)) |
| 4284 | return FALSE; |
| 4285 | |
| 4286 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4287 | { |
| 4288 | if (bfinfdpic_got_section (info)->size) |
| 4289 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)) |
| 4290 | return FALSE; |
| 4291 | |
| 4292 | if (bfinfdpic_pltrel_section (info)->size) |
| 4293 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0) |
| 4294 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL) |
| 4295 | || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0)) |
| 4296 | return FALSE; |
| 4297 | |
| 4298 | if (bfinfdpic_gotrel_section (info)->size) |
| 4299 | if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0) |
| 4300 | || !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0) |
| 4301 | || !_bfd_elf_add_dynamic_entry (info, DT_RELENT, |
| 4302 | sizeof (Elf32_External_Rel))) |
| 4303 | return FALSE; |
| 4304 | } |
| 4305 | |
| 4306 | s = bfd_get_linker_section (dynobj, ".dynbss"); |
| 4307 | if (s && s->size == 0) |
| 4308 | s->flags |= SEC_EXCLUDE; |
| 4309 | |
| 4310 | s = bfd_get_linker_section (dynobj, ".rela.bss"); |
| 4311 | if (s && s->size == 0) |
| 4312 | s->flags |= SEC_EXCLUDE; |
| 4313 | |
| 4314 | return TRUE; |
| 4315 | } |
| 4316 | |
| 4317 | static bfd_boolean |
| 4318 | elf32_bfinfdpic_always_size_sections (bfd *output_bfd, |
| 4319 | struct bfd_link_info *info) |
| 4320 | { |
| 4321 | if (!info->relocatable |
| 4322 | && !bfd_elf_stack_segment_size (output_bfd, info, |
| 4323 | "__stacksize", DEFAULT_STACK_SIZE)) |
| 4324 | return FALSE; |
| 4325 | |
| 4326 | return TRUE; |
| 4327 | } |
| 4328 | |
| 4329 | /* Check whether any of the relocations was optimized away, and |
| 4330 | subtract it from the relocation or fixup count. */ |
| 4331 | static bfd_boolean |
| 4332 | _bfinfdpic_check_discarded_relocs (bfd *abfd, asection *sec, |
| 4333 | struct bfd_link_info *info, |
| 4334 | bfd_boolean *changed) |
| 4335 | { |
| 4336 | Elf_Internal_Shdr *symtab_hdr; |
| 4337 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; |
| 4338 | Elf_Internal_Rela *rel, *erel; |
| 4339 | |
| 4340 | if ((sec->flags & SEC_RELOC) == 0 |
| 4341 | || sec->reloc_count == 0) |
| 4342 | return TRUE; |
| 4343 | |
| 4344 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 4345 | sym_hashes = elf_sym_hashes (abfd); |
| 4346 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym); |
| 4347 | if (!elf_bad_symtab (abfd)) |
| 4348 | sym_hashes_end -= symtab_hdr->sh_info; |
| 4349 | |
| 4350 | rel = elf_section_data (sec)->relocs; |
| 4351 | |
| 4352 | /* Now examine each relocation. */ |
| 4353 | for (erel = rel + sec->reloc_count; rel < erel; rel++) |
| 4354 | { |
| 4355 | struct elf_link_hash_entry *h; |
| 4356 | unsigned long r_symndx; |
| 4357 | struct bfinfdpic_relocs_info *picrel; |
| 4358 | struct _bfinfdpic_dynamic_got_info *dinfo; |
| 4359 | |
| 4360 | if (ELF32_R_TYPE (rel->r_info) != R_BFIN_BYTE4_DATA |
| 4361 | && ELF32_R_TYPE (rel->r_info) != R_BFIN_FUNCDESC) |
| 4362 | continue; |
| 4363 | |
| 4364 | if (_bfd_elf_section_offset (sec->output_section->owner, |
| 4365 | info, sec, rel->r_offset) |
| 4366 | != (bfd_vma)-1) |
| 4367 | continue; |
| 4368 | |
| 4369 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 4370 | if (r_symndx < symtab_hdr->sh_info) |
| 4371 | h = NULL; |
| 4372 | else |
| 4373 | { |
| 4374 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 4375 | while (h->root.type == bfd_link_hash_indirect |
| 4376 | || h->root.type == bfd_link_hash_warning) |
| 4377 | h = (struct elf_link_hash_entry *)h->root.u.i.link; |
| 4378 | } |
| 4379 | |
| 4380 | if (h != NULL) |
| 4381 | picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info), |
| 4382 | abfd, h, |
| 4383 | rel->r_addend, NO_INSERT); |
| 4384 | else |
| 4385 | picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info (info), |
| 4386 | abfd, r_symndx, |
| 4387 | rel->r_addend, NO_INSERT); |
| 4388 | |
| 4389 | if (! picrel) |
| 4390 | return FALSE; |
| 4391 | |
| 4392 | *changed = TRUE; |
| 4393 | dinfo = bfinfdpic_dynamic_got_plt_info (info); |
| 4394 | |
| 4395 | _bfinfdpic_count_relocs_fixups (picrel, dinfo, TRUE); |
| 4396 | if (ELF32_R_TYPE (rel->r_info) == R_BFIN_BYTE4_DATA) |
| 4397 | picrel->relocs32--; |
| 4398 | else /* we know (ELF32_R_TYPE (rel->r_info) == R_BFIN_FUNCDESC) */ |
| 4399 | picrel->relocsfd--; |
| 4400 | _bfinfdpic_count_relocs_fixups (picrel, dinfo, FALSE); |
| 4401 | } |
| 4402 | |
| 4403 | return TRUE; |
| 4404 | } |
| 4405 | |
| 4406 | static bfd_boolean |
| 4407 | bfinfdpic_elf_discard_info (bfd *ibfd, |
| 4408 | struct elf_reloc_cookie *cookie ATTRIBUTE_UNUSED, |
| 4409 | struct bfd_link_info *info) |
| 4410 | { |
| 4411 | bfd_boolean changed = FALSE; |
| 4412 | asection *s; |
| 4413 | bfd *obfd = NULL; |
| 4414 | |
| 4415 | /* Account for relaxation of .eh_frame section. */ |
| 4416 | for (s = ibfd->sections; s; s = s->next) |
| 4417 | if (s->sec_info_type == SEC_INFO_TYPE_EH_FRAME) |
| 4418 | { |
| 4419 | if (!_bfinfdpic_check_discarded_relocs (ibfd, s, info, &changed)) |
| 4420 | return FALSE; |
| 4421 | obfd = s->output_section->owner; |
| 4422 | } |
| 4423 | |
| 4424 | if (changed) |
| 4425 | { |
| 4426 | struct _bfinfdpic_dynamic_got_plt_info gpinfo; |
| 4427 | |
| 4428 | memset (&gpinfo, 0, sizeof (gpinfo)); |
| 4429 | memcpy (&gpinfo.g, bfinfdpic_dynamic_got_plt_info (info), |
| 4430 | sizeof (gpinfo.g)); |
| 4431 | |
| 4432 | /* Clear GOT and PLT assignments. */ |
| 4433 | htab_traverse (bfinfdpic_relocs_info (info), |
| 4434 | _bfinfdpic_reset_got_plt_entries, |
| 4435 | NULL); |
| 4436 | |
| 4437 | if (!_bfinfdpic_size_got_plt (obfd, &gpinfo)) |
| 4438 | return FALSE; |
| 4439 | } |
| 4440 | |
| 4441 | return TRUE; |
| 4442 | } |
| 4443 | |
| 4444 | static bfd_boolean |
| 4445 | elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd, |
| 4446 | struct bfd_link_info *info) |
| 4447 | { |
| 4448 | bfd *dynobj; |
| 4449 | asection *sdyn; |
| 4450 | |
| 4451 | dynobj = elf_hash_table (info)->dynobj; |
| 4452 | |
| 4453 | if (bfinfdpic_got_section (info)) |
| 4454 | { |
| 4455 | BFD_ASSERT (bfinfdpic_gotrel_section (info)->size |
| 4456 | == (bfinfdpic_gotrel_section (info)->reloc_count |
| 4457 | * sizeof (Elf32_External_Rel))); |
| 4458 | |
| 4459 | if (bfinfdpic_gotfixup_section (info)) |
| 4460 | { |
| 4461 | struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot; |
| 4462 | bfd_vma got_value = hgot->root.u.def.value |
| 4463 | + hgot->root.u.def.section->output_section->vma |
| 4464 | + hgot->root.u.def.section->output_offset; |
| 4465 | |
| 4466 | _bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info), |
| 4467 | got_value, 0); |
| 4468 | |
| 4469 | if (bfinfdpic_gotfixup_section (info)->size |
| 4470 | != (bfinfdpic_gotfixup_section (info)->reloc_count * 4)) |
| 4471 | { |
| 4472 | (*_bfd_error_handler) |
| 4473 | ("LINKER BUG: .rofixup section size mismatch"); |
| 4474 | return FALSE; |
| 4475 | } |
| 4476 | } |
| 4477 | } |
| 4478 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4479 | { |
| 4480 | BFD_ASSERT (bfinfdpic_pltrel_section (info)->size |
| 4481 | == (bfinfdpic_pltrel_section (info)->reloc_count |
| 4482 | * sizeof (Elf32_External_Rel))); |
| 4483 | } |
| 4484 | |
| 4485 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 4486 | |
| 4487 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4488 | { |
| 4489 | Elf32_External_Dyn * dyncon; |
| 4490 | Elf32_External_Dyn * dynconend; |
| 4491 | |
| 4492 | BFD_ASSERT (sdyn != NULL); |
| 4493 | |
| 4494 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 4495 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 4496 | |
| 4497 | for (; dyncon < dynconend; dyncon++) |
| 4498 | { |
| 4499 | Elf_Internal_Dyn dyn; |
| 4500 | |
| 4501 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 4502 | |
| 4503 | switch (dyn.d_tag) |
| 4504 | { |
| 4505 | default: |
| 4506 | break; |
| 4507 | |
| 4508 | case DT_PLTGOT: |
| 4509 | dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma |
| 4510 | + bfinfdpic_got_section (info)->output_offset |
| 4511 | + bfinfdpic_got_initial_offset (info); |
| 4512 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4513 | break; |
| 4514 | |
| 4515 | case DT_JMPREL: |
| 4516 | dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info) |
| 4517 | ->output_section->vma |
| 4518 | + bfinfdpic_pltrel_section (info)->output_offset; |
| 4519 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4520 | break; |
| 4521 | |
| 4522 | case DT_PLTRELSZ: |
| 4523 | dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size; |
| 4524 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4525 | break; |
| 4526 | } |
| 4527 | } |
| 4528 | } |
| 4529 | |
| 4530 | return TRUE; |
| 4531 | } |
| 4532 | |
| 4533 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 4534 | regular object. */ |
| 4535 | |
| 4536 | static bfd_boolean |
| 4537 | elf32_bfinfdpic_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 4538 | struct elf_link_hash_entry *h) |
| 4539 | { |
| 4540 | bfd * dynobj; |
| 4541 | |
| 4542 | dynobj = elf_hash_table (info)->dynobj; |
| 4543 | |
| 4544 | /* Make sure we know what is going on here. */ |
| 4545 | BFD_ASSERT (dynobj != NULL |
| 4546 | && (h->u.weakdef != NULL |
| 4547 | || (h->def_dynamic |
| 4548 | && h->ref_regular |
| 4549 | && !h->def_regular))); |
| 4550 | |
| 4551 | /* If this is a weak symbol, and there is a real definition, the |
| 4552 | processor independent code will have arranged for us to see the |
| 4553 | real definition first, and we can just use the same value. */ |
| 4554 | if (h->u.weakdef != NULL) |
| 4555 | { |
| 4556 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 4557 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 4558 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 4559 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 4560 | } |
| 4561 | |
| 4562 | return TRUE; |
| 4563 | } |
| 4564 | |
| 4565 | /* Perform any actions needed for dynamic symbols. */ |
| 4566 | |
| 4567 | static bfd_boolean |
| 4568 | elf32_bfinfdpic_finish_dynamic_symbol |
| 4569 | (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 4570 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 4571 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED, |
| 4572 | Elf_Internal_Sym *sym ATTRIBUTE_UNUSED) |
| 4573 | { |
| 4574 | return TRUE; |
| 4575 | } |
| 4576 | |
| 4577 | /* Decide whether to attempt to turn absptr or lsda encodings in |
| 4578 | shared libraries into pcrel within the given input section. */ |
| 4579 | |
| 4580 | static bfd_boolean |
| 4581 | bfinfdpic_elf_use_relative_eh_frame |
| 4582 | (bfd *input_bfd ATTRIBUTE_UNUSED, |
| 4583 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 4584 | asection *eh_frame_section ATTRIBUTE_UNUSED) |
| 4585 | { |
| 4586 | /* We can't use PC-relative encodings in FDPIC binaries, in general. */ |
| 4587 | return FALSE; |
| 4588 | } |
| 4589 | |
| 4590 | /* Adjust the contents of an eh_frame_hdr section before they're output. */ |
| 4591 | |
| 4592 | static bfd_byte |
| 4593 | bfinfdpic_elf_encode_eh_address (bfd *abfd, |
| 4594 | struct bfd_link_info *info, |
| 4595 | asection *osec, bfd_vma offset, |
| 4596 | asection *loc_sec, bfd_vma loc_offset, |
| 4597 | bfd_vma *encoded) |
| 4598 | { |
| 4599 | struct elf_link_hash_entry *h; |
| 4600 | |
| 4601 | h = elf_hash_table (info)->hgot; |
| 4602 | BFD_ASSERT (h && h->root.type == bfd_link_hash_defined); |
| 4603 | |
| 4604 | if (! h || (_bfinfdpic_osec_to_segment (abfd, osec) |
| 4605 | == _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section))) |
| 4606 | return _bfd_elf_encode_eh_address (abfd, info, osec, offset, |
| 4607 | loc_sec, loc_offset, encoded); |
| 4608 | |
| 4609 | BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec) |
| 4610 | == (_bfinfdpic_osec_to_segment |
| 4611 | (abfd, h->root.u.def.section->output_section))); |
| 4612 | |
| 4613 | *encoded = osec->vma + offset |
| 4614 | - (h->root.u.def.value |
| 4615 | + h->root.u.def.section->output_section->vma |
| 4616 | + h->root.u.def.section->output_offset); |
| 4617 | |
| 4618 | return DW_EH_PE_datarel | DW_EH_PE_sdata4; |
| 4619 | } |
| 4620 | |
| 4621 | |
| 4622 | |
| 4623 | /* Look through the relocs for a section during the first phase. |
| 4624 | |
| 4625 | Besides handling virtual table relocs for gc, we have to deal with |
| 4626 | all sorts of PIC-related relocations. We describe below the |
| 4627 | general plan on how to handle such relocations, even though we only |
| 4628 | collect information at this point, storing them in hash tables for |
| 4629 | perusal of later passes. |
| 4630 | |
| 4631 | 32 relocations are propagated to the linker output when creating |
| 4632 | position-independent output. LO16 and HI16 relocations are not |
| 4633 | supposed to be encountered in this case. |
| 4634 | |
| 4635 | LABEL16 should always be resolvable by the linker, since it's only |
| 4636 | used by branches. |
| 4637 | |
| 4638 | LABEL24, on the other hand, is used by calls. If it turns out that |
| 4639 | the target of a call is a dynamic symbol, a PLT entry must be |
| 4640 | created for it, which triggers the creation of a private function |
| 4641 | descriptor and, unless lazy binding is disabled, a lazy PLT entry. |
| 4642 | |
| 4643 | GPREL relocations require the referenced symbol to be in the same |
| 4644 | segment as _gp, but this can only be checked later. |
| 4645 | |
| 4646 | All GOT, GOTOFF and FUNCDESC relocations require a .got section to |
| 4647 | exist. LABEL24 might as well, since it may require a PLT entry, |
| 4648 | that will require a got. |
| 4649 | |
| 4650 | Non-FUNCDESC GOT relocations require a GOT entry to be created |
| 4651 | regardless of whether the symbol is dynamic. However, since a |
| 4652 | global symbol that turns out to not be exported may have the same |
| 4653 | address of a non-dynamic symbol, we don't assign GOT entries at |
| 4654 | this point, such that we can share them in this case. A relocation |
| 4655 | for the GOT entry always has to be created, be it to offset a |
| 4656 | private symbol by the section load address, be it to get the symbol |
| 4657 | resolved dynamically. |
| 4658 | |
| 4659 | FUNCDESC GOT relocations require a GOT entry to be created, and |
| 4660 | handled as if a FUNCDESC relocation was applied to the GOT entry in |
| 4661 | an object file. |
| 4662 | |
| 4663 | FUNCDESC relocations referencing a symbol that turns out to NOT be |
| 4664 | dynamic cause a private function descriptor to be created. The |
| 4665 | FUNCDESC relocation then decays to a 32 relocation that points at |
| 4666 | the private descriptor. If the symbol is dynamic, the FUNCDESC |
| 4667 | relocation is propagated to the linker output, such that the |
| 4668 | dynamic linker creates the canonical descriptor, pointing to the |
| 4669 | dynamically-resolved definition of the function. |
| 4670 | |
| 4671 | Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic |
| 4672 | symbols that are assigned to the same segment as the GOT, but we |
| 4673 | can only check this later, after we know the complete set of |
| 4674 | symbols defined and/or exported. |
| 4675 | |
| 4676 | FUNCDESC GOTOFF relocations require a function descriptor to be |
| 4677 | created and, unless lazy binding is disabled or the symbol is not |
| 4678 | dynamic, a lazy PLT entry. Since we can't tell at this point |
| 4679 | whether a symbol is going to be dynamic, we have to decide later |
| 4680 | whether to create a lazy PLT entry or bind the descriptor directly |
| 4681 | to the private function. |
| 4682 | |
| 4683 | FUNCDESC_VALUE relocations are not supposed to be present in object |
| 4684 | files, but they may very well be simply propagated to the linker |
| 4685 | output, since they have no side effect. |
| 4686 | |
| 4687 | |
| 4688 | A function descriptor always requires a FUNCDESC_VALUE relocation. |
| 4689 | Whether it's in .plt.rel or not depends on whether lazy binding is |
| 4690 | enabled and on whether the referenced symbol is dynamic. |
| 4691 | |
| 4692 | The existence of a lazy PLT requires the resolverStub lazy PLT |
| 4693 | entry to be present. |
| 4694 | |
| 4695 | |
| 4696 | As for assignment of GOT, PLT and lazy PLT entries, and private |
| 4697 | descriptors, we might do them all sequentially, but we can do |
| 4698 | better than that. For example, we can place GOT entries and |
| 4699 | private function descriptors referenced using 12-bit operands |
| 4700 | closer to the PIC register value, such that these relocations don't |
| 4701 | overflow. Those that are only referenced with LO16 relocations |
| 4702 | could come next, but we may as well place PLT-required function |
| 4703 | descriptors in the 12-bit range to make them shorter. Symbols |
| 4704 | referenced with LO16/HI16 may come next, but we may place |
| 4705 | additional function descriptors in the 16-bit range if we can |
| 4706 | reliably tell that we've already placed entries that are ever |
| 4707 | referenced with only LO16. PLT entries are therefore generated as |
| 4708 | small as possible, while not introducing relocation overflows in |
| 4709 | GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be |
| 4710 | generated before or after PLT entries, but not intermingled with |
| 4711 | them, such that we can have more lazy PLT entries in range for a |
| 4712 | branch to the resolverStub. The resolverStub should be emitted at |
| 4713 | the most distant location from the first lazy PLT entry such that |
| 4714 | it's still in range for a branch, or closer, if there isn't a need |
| 4715 | for so many lazy PLT entries. Additional lazy PLT entries may be |
| 4716 | emitted after the resolverStub, as long as branches are still in |
| 4717 | range. If the branch goes out of range, longer lazy PLT entries |
| 4718 | are emitted. |
| 4719 | |
| 4720 | We could further optimize PLT and lazy PLT entries by giving them |
| 4721 | priority in assignment to closer-to-gr17 locations depending on the |
| 4722 | number of occurrences of references to them (assuming a function |
| 4723 | that's called more often is more important for performance, so its |
| 4724 | PLT entry should be faster), or taking hints from the compiler. |
| 4725 | Given infinite time and money... :-) */ |
| 4726 | |
| 4727 | static bfd_boolean |
| 4728 | bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info, |
| 4729 | asection *sec, const Elf_Internal_Rela *relocs) |
| 4730 | { |
| 4731 | Elf_Internal_Shdr *symtab_hdr; |
| 4732 | struct elf_link_hash_entry **sym_hashes; |
| 4733 | const Elf_Internal_Rela *rel; |
| 4734 | const Elf_Internal_Rela *rel_end; |
| 4735 | bfd *dynobj; |
| 4736 | struct bfinfdpic_relocs_info *picrel; |
| 4737 | |
| 4738 | if (info->relocatable) |
| 4739 | return TRUE; |
| 4740 | |
| 4741 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 4742 | sym_hashes = elf_sym_hashes (abfd); |
| 4743 | |
| 4744 | dynobj = elf_hash_table (info)->dynobj; |
| 4745 | rel_end = relocs + sec->reloc_count; |
| 4746 | for (rel = relocs; rel < rel_end; rel++) |
| 4747 | { |
| 4748 | struct elf_link_hash_entry *h; |
| 4749 | unsigned long r_symndx; |
| 4750 | |
| 4751 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 4752 | if (r_symndx < symtab_hdr->sh_info) |
| 4753 | h = NULL; |
| 4754 | else |
| 4755 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 4756 | |
| 4757 | switch (ELF32_R_TYPE (rel->r_info)) |
| 4758 | { |
| 4759 | case R_BFIN_GOT17M4: |
| 4760 | case R_BFIN_GOTHI: |
| 4761 | case R_BFIN_GOTLO: |
| 4762 | case R_BFIN_FUNCDESC_GOT17M4: |
| 4763 | case R_BFIN_FUNCDESC_GOTHI: |
| 4764 | case R_BFIN_FUNCDESC_GOTLO: |
| 4765 | case R_BFIN_GOTOFF17M4: |
| 4766 | case R_BFIN_GOTOFFHI: |
| 4767 | case R_BFIN_GOTOFFLO: |
| 4768 | case R_BFIN_FUNCDESC_GOTOFF17M4: |
| 4769 | case R_BFIN_FUNCDESC_GOTOFFHI: |
| 4770 | case R_BFIN_FUNCDESC_GOTOFFLO: |
| 4771 | case R_BFIN_FUNCDESC: |
| 4772 | case R_BFIN_FUNCDESC_VALUE: |
| 4773 | if (! IS_FDPIC (abfd)) |
| 4774 | goto bad_reloc; |
| 4775 | /* Fall through. */ |
| 4776 | case R_BFIN_PCREL24: |
| 4777 | case R_BFIN_PCREL24_JUMP_L: |
| 4778 | case R_BFIN_BYTE4_DATA: |
| 4779 | if (IS_FDPIC (abfd) && ! dynobj) |
| 4780 | { |
| 4781 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 4782 | if (! _bfin_create_got_section (abfd, info)) |
| 4783 | return FALSE; |
| 4784 | } |
| 4785 | if (! IS_FDPIC (abfd)) |
| 4786 | { |
| 4787 | picrel = NULL; |
| 4788 | break; |
| 4789 | } |
| 4790 | if (h != NULL) |
| 4791 | { |
| 4792 | if (h->dynindx == -1) |
| 4793 | switch (ELF_ST_VISIBILITY (h->other)) |
| 4794 | { |
| 4795 | case STV_INTERNAL: |
| 4796 | case STV_HIDDEN: |
| 4797 | break; |
| 4798 | default: |
| 4799 | bfd_elf_link_record_dynamic_symbol (info, h); |
| 4800 | break; |
| 4801 | } |
| 4802 | picrel |
| 4803 | = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info), |
| 4804 | abfd, h, |
| 4805 | rel->r_addend, INSERT); |
| 4806 | } |
| 4807 | else |
| 4808 | picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info |
| 4809 | (info), abfd, r_symndx, |
| 4810 | rel->r_addend, INSERT); |
| 4811 | if (! picrel) |
| 4812 | return FALSE; |
| 4813 | break; |
| 4814 | |
| 4815 | default: |
| 4816 | picrel = NULL; |
| 4817 | break; |
| 4818 | } |
| 4819 | |
| 4820 | switch (ELF32_R_TYPE (rel->r_info)) |
| 4821 | { |
| 4822 | case R_BFIN_PCREL24: |
| 4823 | case R_BFIN_PCREL24_JUMP_L: |
| 4824 | if (IS_FDPIC (abfd)) |
| 4825 | picrel->call++; |
| 4826 | break; |
| 4827 | |
| 4828 | case R_BFIN_FUNCDESC_VALUE: |
| 4829 | picrel->relocsfdv++; |
| 4830 | if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC) |
| 4831 | picrel->relocs32--; |
| 4832 | /* Fall through. */ |
| 4833 | |
| 4834 | case R_BFIN_BYTE4_DATA: |
| 4835 | if (! IS_FDPIC (abfd)) |
| 4836 | break; |
| 4837 | |
| 4838 | picrel->sym++; |
| 4839 | if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC) |
| 4840 | picrel->relocs32++; |
| 4841 | break; |
| 4842 | |
| 4843 | case R_BFIN_GOT17M4: |
| 4844 | picrel->got17m4++; |
| 4845 | break; |
| 4846 | |
| 4847 | case R_BFIN_GOTHI: |
| 4848 | case R_BFIN_GOTLO: |
| 4849 | picrel->gothilo++; |
| 4850 | break; |
| 4851 | |
| 4852 | case R_BFIN_FUNCDESC_GOT17M4: |
| 4853 | picrel->fdgot17m4++; |
| 4854 | break; |
| 4855 | |
| 4856 | case R_BFIN_FUNCDESC_GOTHI: |
| 4857 | case R_BFIN_FUNCDESC_GOTLO: |
| 4858 | picrel->fdgothilo++; |
| 4859 | break; |
| 4860 | |
| 4861 | case R_BFIN_GOTOFF17M4: |
| 4862 | case R_BFIN_GOTOFFHI: |
| 4863 | case R_BFIN_GOTOFFLO: |
| 4864 | picrel->gotoff++; |
| 4865 | break; |
| 4866 | |
| 4867 | case R_BFIN_FUNCDESC_GOTOFF17M4: |
| 4868 | picrel->fdgoff17m4++; |
| 4869 | break; |
| 4870 | |
| 4871 | case R_BFIN_FUNCDESC_GOTOFFHI: |
| 4872 | case R_BFIN_FUNCDESC_GOTOFFLO: |
| 4873 | picrel->fdgoffhilo++; |
| 4874 | break; |
| 4875 | |
| 4876 | case R_BFIN_FUNCDESC: |
| 4877 | picrel->fd++; |
| 4878 | picrel->relocsfd++; |
| 4879 | break; |
| 4880 | |
| 4881 | /* This relocation describes the C++ object vtable hierarchy. |
| 4882 | Reconstruct it for later use during GC. */ |
| 4883 | case R_BFIN_GNU_VTINHERIT: |
| 4884 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 4885 | return FALSE; |
| 4886 | break; |
| 4887 | |
| 4888 | /* This relocation describes which C++ vtable entries are actually |
| 4889 | used. Record for later use during GC. */ |
| 4890 | case R_BFIN_GNU_VTENTRY: |
| 4891 | BFD_ASSERT (h != NULL); |
| 4892 | if (h != NULL |
| 4893 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 4894 | return FALSE; |
| 4895 | break; |
| 4896 | |
| 4897 | case R_BFIN_HUIMM16: |
| 4898 | case R_BFIN_LUIMM16: |
| 4899 | case R_BFIN_PCREL12_JUMP_S: |
| 4900 | case R_BFIN_PCREL10: |
| 4901 | break; |
| 4902 | |
| 4903 | default: |
| 4904 | bad_reloc: |
| 4905 | (*_bfd_error_handler) |
| 4906 | (_("%B: unsupported relocation type %i"), |
| 4907 | abfd, ELF32_R_TYPE (rel->r_info)); |
| 4908 | return FALSE; |
| 4909 | } |
| 4910 | } |
| 4911 | |
| 4912 | return TRUE; |
| 4913 | } |
| 4914 | |
| 4915 | /* Set the right machine number for a Blackfin ELF file. */ |
| 4916 | |
| 4917 | static bfd_boolean |
| 4918 | elf32_bfin_object_p (bfd *abfd) |
| 4919 | { |
| 4920 | bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0); |
| 4921 | return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0) |
| 4922 | == (IS_FDPIC (abfd))); |
| 4923 | } |
| 4924 | |
| 4925 | static bfd_boolean |
| 4926 | elf32_bfin_set_private_flags (bfd * abfd, flagword flags) |
| 4927 | { |
| 4928 | elf_elfheader (abfd)->e_flags = flags; |
| 4929 | elf_flags_init (abfd) = TRUE; |
| 4930 | return TRUE; |
| 4931 | } |
| 4932 | |
| 4933 | /* Display the flags field. */ |
| 4934 | static bfd_boolean |
| 4935 | elf32_bfin_print_private_bfd_data (bfd * abfd, void * ptr) |
| 4936 | { |
| 4937 | FILE *file = (FILE *) ptr; |
| 4938 | flagword flags; |
| 4939 | |
| 4940 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 4941 | |
| 4942 | /* Print normal ELF private data. */ |
| 4943 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 4944 | |
| 4945 | flags = elf_elfheader (abfd)->e_flags; |
| 4946 | |
| 4947 | /* xgettext:c-format */ |
| 4948 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| 4949 | |
| 4950 | if (flags & EF_BFIN_PIC) |
| 4951 | fprintf (file, " -fpic"); |
| 4952 | |
| 4953 | if (flags & EF_BFIN_FDPIC) |
| 4954 | fprintf (file, " -mfdpic"); |
| 4955 | |
| 4956 | fputc ('\n', file); |
| 4957 | |
| 4958 | return TRUE; |
| 4959 | } |
| 4960 | |
| 4961 | /* Merge backend specific data from an object file to the output |
| 4962 | object file when linking. */ |
| 4963 | |
| 4964 | static bfd_boolean |
| 4965 | elf32_bfin_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 4966 | { |
| 4967 | flagword old_flags, new_flags; |
| 4968 | bfd_boolean error = FALSE; |
| 4969 | |
| 4970 | new_flags = elf_elfheader (ibfd)->e_flags; |
| 4971 | old_flags = elf_elfheader (obfd)->e_flags; |
| 4972 | |
| 4973 | if (new_flags & EF_BFIN_FDPIC) |
| 4974 | new_flags &= ~EF_BFIN_PIC; |
| 4975 | |
| 4976 | #ifndef DEBUG |
| 4977 | if (0) |
| 4978 | #endif |
| 4979 | (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s", |
| 4980 | old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no", |
| 4981 | bfd_get_filename (ibfd)); |
| 4982 | |
| 4983 | if (!elf_flags_init (obfd)) /* First call, no flags set. */ |
| 4984 | { |
| 4985 | elf_flags_init (obfd) = TRUE; |
| 4986 | elf_elfheader (obfd)->e_flags = new_flags; |
| 4987 | } |
| 4988 | |
| 4989 | if (((new_flags & EF_BFIN_FDPIC) == 0) != (! IS_FDPIC (obfd))) |
| 4990 | { |
| 4991 | error = TRUE; |
| 4992 | if (IS_FDPIC (obfd)) |
| 4993 | (*_bfd_error_handler) |
| 4994 | (_("%s: cannot link non-fdpic object file into fdpic executable"), |
| 4995 | bfd_get_filename (ibfd)); |
| 4996 | else |
| 4997 | (*_bfd_error_handler) |
| 4998 | (_("%s: cannot link fdpic object file into non-fdpic executable"), |
| 4999 | bfd_get_filename (ibfd)); |
| 5000 | } |
| 5001 | |
| 5002 | if (error) |
| 5003 | bfd_set_error (bfd_error_bad_value); |
| 5004 | |
| 5005 | return !error; |
| 5006 | } |
| 5007 | \f |
| 5008 | /* bfin ELF linker hash entry. */ |
| 5009 | |
| 5010 | struct bfin_link_hash_entry |
| 5011 | { |
| 5012 | struct elf_link_hash_entry root; |
| 5013 | |
| 5014 | /* Number of PC relative relocs copied for this symbol. */ |
| 5015 | struct bfin_pcrel_relocs_copied *pcrel_relocs_copied; |
| 5016 | }; |
| 5017 | |
| 5018 | /* bfin ELF linker hash table. */ |
| 5019 | |
| 5020 | struct bfin_link_hash_table |
| 5021 | { |
| 5022 | struct elf_link_hash_table root; |
| 5023 | |
| 5024 | /* Small local sym cache. */ |
| 5025 | struct sym_cache sym_cache; |
| 5026 | }; |
| 5027 | |
| 5028 | #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent)) |
| 5029 | |
| 5030 | static struct bfd_hash_entry * |
| 5031 | bfin_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 5032 | struct bfd_hash_table *table, const char *string) |
| 5033 | { |
| 5034 | struct bfd_hash_entry *ret = entry; |
| 5035 | |
| 5036 | /* Allocate the structure if it has not already been allocated by a |
| 5037 | subclass. */ |
| 5038 | if (ret == NULL) |
| 5039 | ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry)); |
| 5040 | if (ret == NULL) |
| 5041 | return ret; |
| 5042 | |
| 5043 | /* Call the allocation method of the superclass. */ |
| 5044 | ret = _bfd_elf_link_hash_newfunc (ret, table, string); |
| 5045 | if (ret != NULL) |
| 5046 | bfin_hash_entry (ret)->pcrel_relocs_copied = NULL; |
| 5047 | |
| 5048 | return ret; |
| 5049 | } |
| 5050 | |
| 5051 | /* Create an bfin ELF linker hash table. */ |
| 5052 | |
| 5053 | static struct bfd_link_hash_table * |
| 5054 | bfin_link_hash_table_create (bfd * abfd) |
| 5055 | { |
| 5056 | struct bfin_link_hash_table *ret; |
| 5057 | bfd_size_type amt = sizeof (struct bfin_link_hash_table); |
| 5058 | |
| 5059 | ret = bfd_zmalloc (amt); |
| 5060 | if (ret == NULL) |
| 5061 | return NULL; |
| 5062 | |
| 5063 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 5064 | bfin_link_hash_newfunc, |
| 5065 | sizeof (struct elf_link_hash_entry), |
| 5066 | BFIN_ELF_DATA)) |
| 5067 | { |
| 5068 | free (ret); |
| 5069 | return NULL; |
| 5070 | } |
| 5071 | |
| 5072 | ret->sym_cache.abfd = NULL; |
| 5073 | |
| 5074 | return &ret->root.root; |
| 5075 | } |
| 5076 | |
| 5077 | /* The size in bytes of an entry in the procedure linkage table. */ |
| 5078 | |
| 5079 | /* Finish up the dynamic sections. */ |
| 5080 | |
| 5081 | static bfd_boolean |
| 5082 | bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, |
| 5083 | struct bfd_link_info *info) |
| 5084 | { |
| 5085 | bfd *dynobj; |
| 5086 | asection *sdyn; |
| 5087 | |
| 5088 | dynobj = elf_hash_table (info)->dynobj; |
| 5089 | |
| 5090 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 5091 | |
| 5092 | if (elf_hash_table (info)->dynamic_sections_created) |
| 5093 | { |
| 5094 | Elf32_External_Dyn *dyncon, *dynconend; |
| 5095 | |
| 5096 | BFD_ASSERT (sdyn != NULL); |
| 5097 | |
| 5098 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 5099 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 5100 | for (; dyncon < dynconend; dyncon++) |
| 5101 | { |
| 5102 | Elf_Internal_Dyn dyn; |
| 5103 | |
| 5104 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 5105 | |
| 5106 | } |
| 5107 | |
| 5108 | } |
| 5109 | return TRUE; |
| 5110 | } |
| 5111 | |
| 5112 | /* Finish up dynamic symbol handling. We set the contents of various |
| 5113 | dynamic sections here. */ |
| 5114 | |
| 5115 | static bfd_boolean |
| 5116 | bfin_finish_dynamic_symbol (bfd * output_bfd, |
| 5117 | struct bfd_link_info *info, |
| 5118 | struct elf_link_hash_entry *h, |
| 5119 | Elf_Internal_Sym * sym) |
| 5120 | { |
| 5121 | bfd *dynobj; |
| 5122 | |
| 5123 | dynobj = elf_hash_table (info)->dynobj; |
| 5124 | |
| 5125 | if (h->got.offset != (bfd_vma) - 1) |
| 5126 | { |
| 5127 | asection *sgot; |
| 5128 | asection *srela; |
| 5129 | Elf_Internal_Rela rela; |
| 5130 | bfd_byte *loc; |
| 5131 | |
| 5132 | /* This symbol has an entry in the global offset table. |
| 5133 | Set it up. */ |
| 5134 | |
| 5135 | sgot = bfd_get_linker_section (dynobj, ".got"); |
| 5136 | srela = bfd_get_linker_section (dynobj, ".rela.got"); |
| 5137 | BFD_ASSERT (sgot != NULL && srela != NULL); |
| 5138 | |
| 5139 | rela.r_offset = (sgot->output_section->vma |
| 5140 | + sgot->output_offset |
| 5141 | + (h->got.offset & ~(bfd_vma) 1)); |
| 5142 | |
| 5143 | /* If this is a -Bsymbolic link, and the symbol is defined |
| 5144 | locally, we just want to emit a RELATIVE reloc. Likewise if |
| 5145 | the symbol was forced to be local because of a version file. |
| 5146 | The entry in the global offset table will already have been |
| 5147 | initialized in the relocate_section function. */ |
| 5148 | if (info->shared |
| 5149 | && (info->symbolic |
| 5150 | || h->dynindx == -1 || h->forced_local) && h->def_regular) |
| 5151 | { |
| 5152 | (*_bfd_error_handler) (_("*** check this relocation %s"), |
| 5153 | __FUNCTION__); |
| 5154 | rela.r_info = ELF32_R_INFO (0, R_BFIN_PCREL24); |
| 5155 | rela.r_addend = bfd_get_signed_32 (output_bfd, |
| 5156 | (sgot->contents |
| 5157 | + |
| 5158 | (h->got. |
| 5159 | offset & ~(bfd_vma) 1))); |
| 5160 | } |
| 5161 | else |
| 5162 | { |
| 5163 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
| 5164 | sgot->contents + (h->got.offset & ~(bfd_vma) 1)); |
| 5165 | rela.r_info = ELF32_R_INFO (h->dynindx, R_BFIN_GOT); |
| 5166 | rela.r_addend = 0; |
| 5167 | } |
| 5168 | |
| 5169 | loc = srela->contents; |
| 5170 | loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); |
| 5171 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 5172 | } |
| 5173 | |
| 5174 | if (h->needs_copy) |
| 5175 | { |
| 5176 | BFD_ASSERT (0); |
| 5177 | } |
| 5178 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 5179 | if (strcmp (h->root.root.string, "__DYNAMIC") == 0 |
| 5180 | || h == elf_hash_table (info)->hgot) |
| 5181 | sym->st_shndx = SHN_ABS; |
| 5182 | |
| 5183 | return TRUE; |
| 5184 | } |
| 5185 | |
| 5186 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 5187 | regular object. The current definition is in some section of the |
| 5188 | dynamic object, but we're not including those sections. We have to |
| 5189 | change the definition to something the rest of the link can |
| 5190 | understand. */ |
| 5191 | |
| 5192 | static bfd_boolean |
| 5193 | bfin_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 5194 | struct elf_link_hash_entry *h) |
| 5195 | { |
| 5196 | bfd *dynobj; |
| 5197 | asection *s; |
| 5198 | unsigned int power_of_two; |
| 5199 | |
| 5200 | dynobj = elf_hash_table (info)->dynobj; |
| 5201 | |
| 5202 | /* Make sure we know what is going on here. */ |
| 5203 | BFD_ASSERT (dynobj != NULL |
| 5204 | && (h->needs_plt |
| 5205 | || h->u.weakdef != NULL |
| 5206 | || (h->def_dynamic && h->ref_regular && !h->def_regular))); |
| 5207 | |
| 5208 | /* If this is a function, put it in the procedure linkage table. We |
| 5209 | will fill in the contents of the procedure linkage table later, |
| 5210 | when we know the address of the .got section. */ |
| 5211 | if (h->type == STT_FUNC || h->needs_plt) |
| 5212 | { |
| 5213 | BFD_ASSERT(0); |
| 5214 | } |
| 5215 | |
| 5216 | /* If this is a weak symbol, and there is a real definition, the |
| 5217 | processor independent code will have arranged for us to see the |
| 5218 | real definition first, and we can just use the same value. */ |
| 5219 | if (h->u.weakdef != NULL) |
| 5220 | { |
| 5221 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 5222 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 5223 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 5224 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 5225 | return TRUE; |
| 5226 | } |
| 5227 | |
| 5228 | /* This is a reference to a symbol defined by a dynamic object which |
| 5229 | is not a function. */ |
| 5230 | |
| 5231 | /* If we are creating a shared library, we must presume that the |
| 5232 | only references to the symbol are via the global offset table. |
| 5233 | For such cases we need not do anything here; the relocations will |
| 5234 | be handled correctly by relocate_section. */ |
| 5235 | if (info->shared) |
| 5236 | return TRUE; |
| 5237 | |
| 5238 | /* We must allocate the symbol in our .dynbss section, which will |
| 5239 | become part of the .bss section of the executable. There will be |
| 5240 | an entry for this symbol in the .dynsym section. The dynamic |
| 5241 | object will contain position independent code, so all references |
| 5242 | from the dynamic object to this symbol will go through the global |
| 5243 | offset table. The dynamic linker will use the .dynsym entry to |
| 5244 | determine the address it must put in the global offset table, so |
| 5245 | both the dynamic object and the regular object will refer to the |
| 5246 | same memory location for the variable. */ |
| 5247 | |
| 5248 | s = bfd_get_linker_section (dynobj, ".dynbss"); |
| 5249 | BFD_ASSERT (s != NULL); |
| 5250 | |
| 5251 | /* We must generate a R_68K_COPY reloc to tell the dynamic linker to |
| 5252 | copy the initial value out of the dynamic object and into the |
| 5253 | runtime process image. We need to remember the offset into the |
| 5254 | .rela.bss section we are going to use. */ |
| 5255 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 5256 | { |
| 5257 | asection *srel; |
| 5258 | |
| 5259 | srel = bfd_get_linker_section (dynobj, ".rela.bss"); |
| 5260 | BFD_ASSERT (srel != NULL); |
| 5261 | srel->size += sizeof (Elf32_External_Rela); |
| 5262 | h->needs_copy = 1; |
| 5263 | } |
| 5264 | |
| 5265 | /* We need to figure out the alignment required for this symbol. I |
| 5266 | have no idea how ELF linkers handle this. */ |
| 5267 | power_of_two = bfd_log2 (h->size); |
| 5268 | if (power_of_two > 3) |
| 5269 | power_of_two = 3; |
| 5270 | |
| 5271 | /* Apply the required alignment. */ |
| 5272 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
| 5273 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
| 5274 | { |
| 5275 | if (!bfd_set_section_alignment (dynobj, s, power_of_two)) |
| 5276 | return FALSE; |
| 5277 | } |
| 5278 | |
| 5279 | /* Define the symbol as being at this point in the section. */ |
| 5280 | h->root.u.def.section = s; |
| 5281 | h->root.u.def.value = s->size; |
| 5282 | |
| 5283 | /* Increment the section size to make room for the symbol. */ |
| 5284 | s->size += h->size; |
| 5285 | |
| 5286 | return TRUE; |
| 5287 | } |
| 5288 | |
| 5289 | /* The bfin linker needs to keep track of the number of relocs that it |
| 5290 | decides to copy in check_relocs for each symbol. This is so that it |
| 5291 | can discard PC relative relocs if it doesn't need them when linking |
| 5292 | with -Bsymbolic. We store the information in a field extending the |
| 5293 | regular ELF linker hash table. */ |
| 5294 | |
| 5295 | /* This structure keeps track of the number of PC relative relocs we have |
| 5296 | copied for a given symbol. */ |
| 5297 | |
| 5298 | struct bfin_pcrel_relocs_copied |
| 5299 | { |
| 5300 | /* Next section. */ |
| 5301 | struct bfin_pcrel_relocs_copied *next; |
| 5302 | /* A section in dynobj. */ |
| 5303 | asection *section; |
| 5304 | /* Number of relocs copied in this section. */ |
| 5305 | bfd_size_type count; |
| 5306 | }; |
| 5307 | |
| 5308 | /* This function is called via elf_link_hash_traverse if we are |
| 5309 | creating a shared object. In the -Bsymbolic case it discards the |
| 5310 | space allocated to copy PC relative relocs against symbols which |
| 5311 | are defined in regular objects. For the normal shared case, it |
| 5312 | discards space for pc-relative relocs that have become local due to |
| 5313 | symbol visibility changes. We allocated space for them in the |
| 5314 | check_relocs routine, but we won't fill them in in the |
| 5315 | relocate_section routine. |
| 5316 | |
| 5317 | We also check whether any of the remaining relocations apply |
| 5318 | against a readonly section, and set the DF_TEXTREL flag in this |
| 5319 | case. */ |
| 5320 | |
| 5321 | static bfd_boolean |
| 5322 | bfin_discard_copies (struct elf_link_hash_entry *h, void * inf) |
| 5323 | { |
| 5324 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| 5325 | struct bfin_pcrel_relocs_copied *s; |
| 5326 | |
| 5327 | if (!h->def_regular || (!info->symbolic && !h->forced_local)) |
| 5328 | { |
| 5329 | if ((info->flags & DF_TEXTREL) == 0) |
| 5330 | { |
| 5331 | /* Look for relocations against read-only sections. */ |
| 5332 | for (s = bfin_hash_entry (h)->pcrel_relocs_copied; |
| 5333 | s != NULL; s = s->next) |
| 5334 | if ((s->section->flags & SEC_READONLY) != 0) |
| 5335 | { |
| 5336 | info->flags |= DF_TEXTREL; |
| 5337 | break; |
| 5338 | } |
| 5339 | } |
| 5340 | |
| 5341 | return TRUE; |
| 5342 | } |
| 5343 | |
| 5344 | for (s = bfin_hash_entry (h)->pcrel_relocs_copied; |
| 5345 | s != NULL; s = s->next) |
| 5346 | s->section->size -= s->count * sizeof (Elf32_External_Rela); |
| 5347 | |
| 5348 | return TRUE; |
| 5349 | } |
| 5350 | |
| 5351 | static bfd_boolean |
| 5352 | bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, |
| 5353 | struct bfd_link_info *info) |
| 5354 | { |
| 5355 | bfd *dynobj; |
| 5356 | asection *s; |
| 5357 | bfd_boolean relocs; |
| 5358 | |
| 5359 | dynobj = elf_hash_table (info)->dynobj; |
| 5360 | BFD_ASSERT (dynobj != NULL); |
| 5361 | |
| 5362 | if (elf_hash_table (info)->dynamic_sections_created) |
| 5363 | { |
| 5364 | /* Set the contents of the .interp section to the interpreter. */ |
| 5365 | if (info->executable) |
| 5366 | { |
| 5367 | s = bfd_get_linker_section (dynobj, ".interp"); |
| 5368 | BFD_ASSERT (s != NULL); |
| 5369 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 5370 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 5371 | } |
| 5372 | } |
| 5373 | else |
| 5374 | { |
| 5375 | /* We may have created entries in the .rela.got section. |
| 5376 | However, if we are not creating the dynamic sections, we will |
| 5377 | not actually use these entries. Reset the size of .rela.got, |
| 5378 | which will cause it to get stripped from the output file |
| 5379 | below. */ |
| 5380 | s = bfd_get_linker_section (dynobj, ".rela.got"); |
| 5381 | if (s != NULL) |
| 5382 | s->size = 0; |
| 5383 | } |
| 5384 | |
| 5385 | /* If this is a -Bsymbolic shared link, then we need to discard all |
| 5386 | PC relative relocs against symbols defined in a regular object. |
| 5387 | For the normal shared case we discard the PC relative relocs |
| 5388 | against symbols that have become local due to visibility changes. |
| 5389 | We allocated space for them in the check_relocs routine, but we |
| 5390 | will not fill them in in the relocate_section routine. */ |
| 5391 | if (info->shared) |
| 5392 | elf_link_hash_traverse (elf_hash_table (info), |
| 5393 | bfin_discard_copies, info); |
| 5394 | |
| 5395 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 5396 | determined the sizes of the various dynamic sections. Allocate |
| 5397 | memory for them. */ |
| 5398 | relocs = FALSE; |
| 5399 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 5400 | { |
| 5401 | const char *name; |
| 5402 | bfd_boolean strip; |
| 5403 | |
| 5404 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 5405 | continue; |
| 5406 | |
| 5407 | /* It's OK to base decisions on the section name, because none |
| 5408 | of the dynobj section names depend upon the input files. */ |
| 5409 | name = bfd_get_section_name (dynobj, s); |
| 5410 | |
| 5411 | strip = FALSE; |
| 5412 | |
| 5413 | if (CONST_STRNEQ (name, ".rela")) |
| 5414 | { |
| 5415 | if (s->size == 0) |
| 5416 | { |
| 5417 | /* If we don't need this section, strip it from the |
| 5418 | output file. This is mostly to handle .rela.bss and |
| 5419 | .rela.plt. We must create both sections in |
| 5420 | create_dynamic_sections, because they must be created |
| 5421 | before the linker maps input sections to output |
| 5422 | sections. The linker does that before |
| 5423 | adjust_dynamic_symbol is called, and it is that |
| 5424 | function which decides whether anything needs to go |
| 5425 | into these sections. */ |
| 5426 | strip = TRUE; |
| 5427 | } |
| 5428 | else |
| 5429 | { |
| 5430 | relocs = TRUE; |
| 5431 | |
| 5432 | /* We use the reloc_count field as a counter if we need |
| 5433 | to copy relocs into the output file. */ |
| 5434 | s->reloc_count = 0; |
| 5435 | } |
| 5436 | } |
| 5437 | else if (! CONST_STRNEQ (name, ".got")) |
| 5438 | { |
| 5439 | /* It's not one of our sections, so don't allocate space. */ |
| 5440 | continue; |
| 5441 | } |
| 5442 | |
| 5443 | if (strip) |
| 5444 | { |
| 5445 | s->flags |= SEC_EXCLUDE; |
| 5446 | continue; |
| 5447 | } |
| 5448 | |
| 5449 | /* Allocate memory for the section contents. */ |
| 5450 | /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. |
| 5451 | Unused entries should be reclaimed before the section's contents |
| 5452 | are written out, but at the moment this does not happen. Thus in |
| 5453 | order to prevent writing out garbage, we initialise the section's |
| 5454 | contents to zero. */ |
| 5455 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| 5456 | if (s->contents == NULL && s->size != 0) |
| 5457 | return FALSE; |
| 5458 | } |
| 5459 | |
| 5460 | if (elf_hash_table (info)->dynamic_sections_created) |
| 5461 | { |
| 5462 | /* Add some entries to the .dynamic section. We fill in the |
| 5463 | values later, in bfin_finish_dynamic_sections, but we |
| 5464 | must add the entries now so that we get the correct size for |
| 5465 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 5466 | dynamic linker and used by the debugger. */ |
| 5467 | #define add_dynamic_entry(TAG, VAL) \ |
| 5468 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 5469 | |
| 5470 | if (!info->shared) |
| 5471 | { |
| 5472 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 5473 | return FALSE; |
| 5474 | } |
| 5475 | |
| 5476 | |
| 5477 | if (relocs) |
| 5478 | { |
| 5479 | if (!add_dynamic_entry (DT_RELA, 0) |
| 5480 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 5481 | || !add_dynamic_entry (DT_RELAENT, |
| 5482 | sizeof (Elf32_External_Rela))) |
| 5483 | return FALSE; |
| 5484 | } |
| 5485 | |
| 5486 | if ((info->flags & DF_TEXTREL) != 0) |
| 5487 | { |
| 5488 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 5489 | return FALSE; |
| 5490 | } |
| 5491 | } |
| 5492 | #undef add_dynamic_entry |
| 5493 | |
| 5494 | return TRUE; |
| 5495 | } |
| 5496 | \f |
| 5497 | /* Given a .data section and a .emreloc in-memory section, store |
| 5498 | relocation information into the .emreloc section which can be |
| 5499 | used at runtime to relocate the section. This is called by the |
| 5500 | linker when the --embedded-relocs switch is used. This is called |
| 5501 | after the add_symbols entry point has been called for all the |
| 5502 | objects, and before the final_link entry point is called. */ |
| 5503 | |
| 5504 | bfd_boolean |
| 5505 | bfd_bfin_elf32_create_embedded_relocs (bfd *abfd, |
| 5506 | struct bfd_link_info *info, |
| 5507 | asection *datasec, |
| 5508 | asection *relsec, |
| 5509 | char **errmsg) |
| 5510 | { |
| 5511 | Elf_Internal_Shdr *symtab_hdr; |
| 5512 | Elf_Internal_Sym *isymbuf = NULL; |
| 5513 | Elf_Internal_Rela *internal_relocs = NULL; |
| 5514 | Elf_Internal_Rela *irel, *irelend; |
| 5515 | bfd_byte *p; |
| 5516 | bfd_size_type amt; |
| 5517 | |
| 5518 | BFD_ASSERT (! info->relocatable); |
| 5519 | |
| 5520 | *errmsg = NULL; |
| 5521 | |
| 5522 | if (datasec->reloc_count == 0) |
| 5523 | return TRUE; |
| 5524 | |
| 5525 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 5526 | |
| 5527 | /* Get a copy of the native relocations. */ |
| 5528 | internal_relocs = (_bfd_elf_link_read_relocs |
| 5529 | (abfd, datasec, NULL, (Elf_Internal_Rela *) NULL, |
| 5530 | info->keep_memory)); |
| 5531 | if (internal_relocs == NULL) |
| 5532 | goto error_return; |
| 5533 | |
| 5534 | amt = (bfd_size_type) datasec->reloc_count * 12; |
| 5535 | relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt); |
| 5536 | if (relsec->contents == NULL) |
| 5537 | goto error_return; |
| 5538 | |
| 5539 | p = relsec->contents; |
| 5540 | |
| 5541 | irelend = internal_relocs + datasec->reloc_count; |
| 5542 | for (irel = internal_relocs; irel < irelend; irel++, p += 12) |
| 5543 | { |
| 5544 | asection *targetsec; |
| 5545 | |
| 5546 | /* We are going to write a four byte longword into the runtime |
| 5547 | reloc section. The longword will be the address in the data |
| 5548 | section which must be relocated. It is followed by the name |
| 5549 | of the target section NUL-padded or truncated to 8 |
| 5550 | characters. */ |
| 5551 | |
| 5552 | /* We can only relocate absolute longword relocs at run time. */ |
| 5553 | if (ELF32_R_TYPE (irel->r_info) != (int) R_BFIN_BYTE4_DATA) |
| 5554 | { |
| 5555 | *errmsg = _("unsupported reloc type"); |
| 5556 | bfd_set_error (bfd_error_bad_value); |
| 5557 | goto error_return; |
| 5558 | } |
| 5559 | |
| 5560 | /* Get the target section referred to by the reloc. */ |
| 5561 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 5562 | { |
| 5563 | /* A local symbol. */ |
| 5564 | Elf_Internal_Sym *isym; |
| 5565 | |
| 5566 | /* Read this BFD's local symbols if we haven't done so already. */ |
| 5567 | if (isymbuf == NULL) |
| 5568 | { |
| 5569 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 5570 | if (isymbuf == NULL) |
| 5571 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 5572 | symtab_hdr->sh_info, 0, |
| 5573 | NULL, NULL, NULL); |
| 5574 | if (isymbuf == NULL) |
| 5575 | goto error_return; |
| 5576 | } |
| 5577 | |
| 5578 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 5579 | targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 5580 | } |
| 5581 | else |
| 5582 | { |
| 5583 | unsigned long indx; |
| 5584 | struct elf_link_hash_entry *h; |
| 5585 | |
| 5586 | /* An external symbol. */ |
| 5587 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 5588 | h = elf_sym_hashes (abfd)[indx]; |
| 5589 | BFD_ASSERT (h != NULL); |
| 5590 | if (h->root.type == bfd_link_hash_defined |
| 5591 | || h->root.type == bfd_link_hash_defweak) |
| 5592 | targetsec = h->root.u.def.section; |
| 5593 | else |
| 5594 | targetsec = NULL; |
| 5595 | } |
| 5596 | |
| 5597 | bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p); |
| 5598 | memset (p + 4, 0, 8); |
| 5599 | if (targetsec != NULL) |
| 5600 | strncpy ((char *) p + 4, targetsec->output_section->name, 8); |
| 5601 | } |
| 5602 | |
| 5603 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 5604 | free (isymbuf); |
| 5605 | if (internal_relocs != NULL |
| 5606 | && elf_section_data (datasec)->relocs != internal_relocs) |
| 5607 | free (internal_relocs); |
| 5608 | return TRUE; |
| 5609 | |
| 5610 | error_return: |
| 5611 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 5612 | free (isymbuf); |
| 5613 | if (internal_relocs != NULL |
| 5614 | && elf_section_data (datasec)->relocs != internal_relocs) |
| 5615 | free (internal_relocs); |
| 5616 | return FALSE; |
| 5617 | } |
| 5618 | |
| 5619 | struct bfd_elf_special_section const elf32_bfin_special_sections[] = |
| 5620 | { |
| 5621 | { ".l1.text", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, |
| 5622 | { ".l1.data", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| 5623 | { NULL, 0, 0, 0, 0 } |
| 5624 | }; |
| 5625 | |
| 5626 | \f |
| 5627 | #define TARGET_LITTLE_SYM bfd_elf32_bfin_vec |
| 5628 | #define TARGET_LITTLE_NAME "elf32-bfin" |
| 5629 | #define ELF_ARCH bfd_arch_bfin |
| 5630 | #define ELF_TARGET_ID BFIN_ELF_DATA |
| 5631 | #define ELF_MACHINE_CODE EM_BLACKFIN |
| 5632 | #define ELF_MAXPAGESIZE 0x1000 |
| 5633 | #define elf_symbol_leading_char '_' |
| 5634 | |
| 5635 | #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup |
| 5636 | #define bfd_elf32_bfd_reloc_name_lookup \ |
| 5637 | bfin_bfd_reloc_name_lookup |
| 5638 | #define elf_info_to_howto bfin_info_to_howto |
| 5639 | #define elf_info_to_howto_rel 0 |
| 5640 | #define elf_backend_object_p elf32_bfin_object_p |
| 5641 | |
| 5642 | #define bfd_elf32_bfd_is_local_label_name \ |
| 5643 | bfin_is_local_label_name |
| 5644 | #define bfin_hash_table(p) \ |
| 5645 | ((struct bfin_link_hash_table *) (p)->hash) |
| 5646 | |
| 5647 | |
| 5648 | |
| 5649 | #define elf_backend_create_dynamic_sections \ |
| 5650 | _bfd_elf_create_dynamic_sections |
| 5651 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 5652 | bfin_link_hash_table_create |
| 5653 | #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link |
| 5654 | |
| 5655 | #define elf_backend_check_relocs bfin_check_relocs |
| 5656 | #define elf_backend_adjust_dynamic_symbol \ |
| 5657 | bfin_adjust_dynamic_symbol |
| 5658 | #define elf_backend_size_dynamic_sections \ |
| 5659 | bfin_size_dynamic_sections |
| 5660 | #define elf_backend_relocate_section bfin_relocate_section |
| 5661 | #define elf_backend_finish_dynamic_symbol \ |
| 5662 | bfin_finish_dynamic_symbol |
| 5663 | #define elf_backend_finish_dynamic_sections \ |
| 5664 | bfin_finish_dynamic_sections |
| 5665 | #define elf_backend_gc_mark_hook bfin_gc_mark_hook |
| 5666 | #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook |
| 5667 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
| 5668 | elf32_bfin_merge_private_bfd_data |
| 5669 | #define bfd_elf32_bfd_set_private_flags \ |
| 5670 | elf32_bfin_set_private_flags |
| 5671 | #define bfd_elf32_bfd_print_private_bfd_data \ |
| 5672 | elf32_bfin_print_private_bfd_data |
| 5673 | #define elf_backend_final_write_processing \ |
| 5674 | elf32_bfin_final_write_processing |
| 5675 | #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class |
| 5676 | #define elf_backend_stack_align 8 |
| 5677 | #define elf_backend_can_gc_sections 1 |
| 5678 | #define elf_backend_special_sections elf32_bfin_special_sections |
| 5679 | #define elf_backend_can_refcount 1 |
| 5680 | #define elf_backend_want_got_plt 0 |
| 5681 | #define elf_backend_plt_readonly 1 |
| 5682 | #define elf_backend_want_plt_sym 0 |
| 5683 | #define elf_backend_got_header_size 12 |
| 5684 | #define elf_backend_rela_normal 1 |
| 5685 | |
| 5686 | #include "elf32-target.h" |
| 5687 | |
| 5688 | #undef TARGET_LITTLE_SYM |
| 5689 | #define TARGET_LITTLE_SYM bfd_elf32_bfinfdpic_vec |
| 5690 | #undef TARGET_LITTLE_NAME |
| 5691 | #define TARGET_LITTLE_NAME "elf32-bfinfdpic" |
| 5692 | #undef elf32_bed |
| 5693 | #define elf32_bed elf32_bfinfdpic_bed |
| 5694 | |
| 5695 | #undef elf_backend_gc_sweep_hook |
| 5696 | #define elf_backend_gc_sweep_hook bfinfdpic_gc_sweep_hook |
| 5697 | |
| 5698 | #undef elf_backend_got_header_size |
| 5699 | #define elf_backend_got_header_size 0 |
| 5700 | |
| 5701 | #undef elf_backend_relocate_section |
| 5702 | #define elf_backend_relocate_section bfinfdpic_relocate_section |
| 5703 | #undef elf_backend_check_relocs |
| 5704 | #define elf_backend_check_relocs bfinfdpic_check_relocs |
| 5705 | |
| 5706 | #undef bfd_elf32_bfd_link_hash_table_create |
| 5707 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 5708 | bfinfdpic_elf_link_hash_table_create |
| 5709 | #undef elf_backend_always_size_sections |
| 5710 | #define elf_backend_always_size_sections \ |
| 5711 | elf32_bfinfdpic_always_size_sections |
| 5712 | |
| 5713 | #undef elf_backend_create_dynamic_sections |
| 5714 | #define elf_backend_create_dynamic_sections \ |
| 5715 | elf32_bfinfdpic_create_dynamic_sections |
| 5716 | #undef elf_backend_adjust_dynamic_symbol |
| 5717 | #define elf_backend_adjust_dynamic_symbol \ |
| 5718 | elf32_bfinfdpic_adjust_dynamic_symbol |
| 5719 | #undef elf_backend_size_dynamic_sections |
| 5720 | #define elf_backend_size_dynamic_sections \ |
| 5721 | elf32_bfinfdpic_size_dynamic_sections |
| 5722 | #undef elf_backend_finish_dynamic_symbol |
| 5723 | #define elf_backend_finish_dynamic_symbol \ |
| 5724 | elf32_bfinfdpic_finish_dynamic_symbol |
| 5725 | #undef elf_backend_finish_dynamic_sections |
| 5726 | #define elf_backend_finish_dynamic_sections \ |
| 5727 | elf32_bfinfdpic_finish_dynamic_sections |
| 5728 | |
| 5729 | #undef elf_backend_discard_info |
| 5730 | #define elf_backend_discard_info \ |
| 5731 | bfinfdpic_elf_discard_info |
| 5732 | #undef elf_backend_can_make_relative_eh_frame |
| 5733 | #define elf_backend_can_make_relative_eh_frame \ |
| 5734 | bfinfdpic_elf_use_relative_eh_frame |
| 5735 | #undef elf_backend_can_make_lsda_relative_eh_frame |
| 5736 | #define elf_backend_can_make_lsda_relative_eh_frame \ |
| 5737 | bfinfdpic_elf_use_relative_eh_frame |
| 5738 | #undef elf_backend_encode_eh_address |
| 5739 | #define elf_backend_encode_eh_address \ |
| 5740 | bfinfdpic_elf_encode_eh_address |
| 5741 | |
| 5742 | #undef elf_backend_may_use_rel_p |
| 5743 | #define elf_backend_may_use_rel_p 1 |
| 5744 | #undef elf_backend_may_use_rela_p |
| 5745 | #define elf_backend_may_use_rela_p 1 |
| 5746 | /* We use REL for dynamic relocations only. */ |
| 5747 | #undef elf_backend_default_use_rela_p |
| 5748 | #define elf_backend_default_use_rela_p 1 |
| 5749 | |
| 5750 | #undef elf_backend_omit_section_dynsym |
| 5751 | #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym |
| 5752 | |
| 5753 | #include "elf32-target.h" |