| 1 | /* 32-bit ELF support for Nios II. |
| 2 | Copyright (C) 2012-2015 Free Software Foundation, Inc. |
| 3 | Contributed by Nigel Gray (ngray@altera.com). |
| 4 | Contributed by Mentor Graphics, Inc. |
| 5 | |
| 6 | This file is part of BFD, the Binary File Descriptor library. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 21 | MA 02110-1301, USA. */ |
| 22 | |
| 23 | /* This file handles Altera Nios II ELF targets. */ |
| 24 | |
| 25 | #include "sysdep.h" |
| 26 | #include "bfd.h" |
| 27 | #include "libbfd.h" |
| 28 | #include "bfdlink.h" |
| 29 | #include "genlink.h" |
| 30 | #include "elf-bfd.h" |
| 31 | #include "elf/nios2.h" |
| 32 | #include "opcode/nios2.h" |
| 33 | #include "elf32-nios2.h" |
| 34 | |
| 35 | /* Use RELA relocations. */ |
| 36 | #ifndef USE_RELA |
| 37 | #define USE_RELA |
| 38 | #endif |
| 39 | |
| 40 | #ifdef USE_REL |
| 41 | #undef USE_REL |
| 42 | #endif |
| 43 | |
| 44 | /* Forward declarations. */ |
| 45 | static bfd_reloc_status_type nios2_elf32_ignore_reloc |
| 46 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 47 | static bfd_reloc_status_type nios2_elf32_hi16_relocate |
| 48 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 49 | static bfd_reloc_status_type nios2_elf32_lo16_relocate |
| 50 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 51 | static bfd_reloc_status_type nios2_elf32_hiadj16_relocate |
| 52 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 53 | static bfd_reloc_status_type nios2_elf32_pcrel_lo16_relocate |
| 54 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 55 | static bfd_reloc_status_type nios2_elf32_pcrel_hiadj16_relocate |
| 56 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 57 | static bfd_reloc_status_type nios2_elf32_pcrel16_relocate |
| 58 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 59 | static bfd_reloc_status_type nios2_elf32_call26_relocate |
| 60 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 61 | static bfd_reloc_status_type nios2_elf32_gprel_relocate |
| 62 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 63 | static bfd_reloc_status_type nios2_elf32_ujmp_relocate |
| 64 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 65 | static bfd_reloc_status_type nios2_elf32_cjmp_relocate |
| 66 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 67 | static bfd_reloc_status_type nios2_elf32_callr_relocate |
| 68 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 69 | |
| 70 | /* Target vector. */ |
| 71 | extern const bfd_target nios2_elf32_le_vec; |
| 72 | extern const bfd_target nios2_elf32_be_vec; |
| 73 | |
| 74 | /* Offset of tp and dtp pointers from start of TLS block. */ |
| 75 | #define TP_OFFSET 0x7000 |
| 76 | #define DTP_OFFSET 0x8000 |
| 77 | |
| 78 | /* The relocation table used for SHT_REL sections. */ |
| 79 | static reloc_howto_type elf_nios2_howto_table_rel[] = { |
| 80 | /* No relocation. */ |
| 81 | HOWTO (R_NIOS2_NONE, /* type */ |
| 82 | 0, /* rightshift */ |
| 83 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 84 | 0, /* bitsize */ |
| 85 | FALSE, /* pc_relative */ |
| 86 | 0, /* bitpos */ |
| 87 | complain_overflow_dont, /* complain_on_overflow */ |
| 88 | bfd_elf_generic_reloc, /* special_function */ |
| 89 | "R_NIOS2_NONE", /* name */ |
| 90 | FALSE, /* partial_inplace */ |
| 91 | 0, /* src_mask */ |
| 92 | 0, /* dst_mask */ |
| 93 | FALSE), /* pcrel_offset */ |
| 94 | |
| 95 | /* 16-bit signed immediate relocation. */ |
| 96 | HOWTO (R_NIOS2_S16, /* type */ |
| 97 | 0, /* rightshift */ |
| 98 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 99 | 16, /* bitsize */ |
| 100 | FALSE, /* pc_relative */ |
| 101 | 6, /* bitpos */ |
| 102 | complain_overflow_signed, /* complain on overflow */ |
| 103 | bfd_elf_generic_reloc, /* special function */ |
| 104 | "R_NIOS2_S16", /* name */ |
| 105 | FALSE, /* partial_inplace */ |
| 106 | 0x003fffc0, /* src_mask */ |
| 107 | 0x003fffc0, /* dest_mask */ |
| 108 | FALSE), /* pcrel_offset */ |
| 109 | |
| 110 | /* 16-bit unsigned immediate relocation. */ |
| 111 | HOWTO (R_NIOS2_U16, /* type */ |
| 112 | 0, /* rightshift */ |
| 113 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 114 | 16, /* bitsize */ |
| 115 | FALSE, /* pc_relative */ |
| 116 | 6, /* bitpos */ |
| 117 | complain_overflow_unsigned, /* complain on overflow */ |
| 118 | bfd_elf_generic_reloc, /* special function */ |
| 119 | "R_NIOS2_U16", /* name */ |
| 120 | FALSE, /* partial_inplace */ |
| 121 | 0x003fffc0, /* src_mask */ |
| 122 | 0x003fffc0, /* dest_mask */ |
| 123 | FALSE), /* pcrel_offset */ |
| 124 | |
| 125 | HOWTO (R_NIOS2_PCREL16, /* type */ |
| 126 | 0, /* rightshift */ |
| 127 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 128 | 16, /* bitsize */ |
| 129 | TRUE, /* pc_relative */ |
| 130 | 6, /* bitpos */ |
| 131 | complain_overflow_signed, /* complain on overflow */ |
| 132 | nios2_elf32_pcrel16_relocate, /* special function */ |
| 133 | "R_NIOS2_PCREL16", /* name */ |
| 134 | FALSE, /* partial_inplace */ |
| 135 | 0x003fffc0, /* src_mask */ |
| 136 | 0x003fffc0, /* dest_mask */ |
| 137 | TRUE), /* pcrel_offset */ |
| 138 | |
| 139 | HOWTO (R_NIOS2_CALL26, /* type */ |
| 140 | 2, /* rightshift */ |
| 141 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 142 | 26, /* bitsize */ |
| 143 | FALSE, /* pc_relative */ |
| 144 | 6, /* bitpos */ |
| 145 | complain_overflow_dont, /* complain on overflow */ |
| 146 | nios2_elf32_call26_relocate, /* special function */ |
| 147 | "R_NIOS2_CALL26", /* name */ |
| 148 | FALSE, /* partial_inplace */ |
| 149 | 0xffffffc0, /* src_mask */ |
| 150 | 0xffffffc0, /* dst_mask */ |
| 151 | FALSE), /* pcrel_offset */ |
| 152 | |
| 153 | HOWTO (R_NIOS2_IMM5, |
| 154 | 0, |
| 155 | 2, |
| 156 | 5, |
| 157 | FALSE, |
| 158 | 6, |
| 159 | complain_overflow_bitfield, |
| 160 | bfd_elf_generic_reloc, |
| 161 | "R_NIOS2_IMM5", |
| 162 | FALSE, |
| 163 | 0x000007c0, |
| 164 | 0x000007c0, |
| 165 | FALSE), |
| 166 | |
| 167 | HOWTO (R_NIOS2_CACHE_OPX, |
| 168 | 0, |
| 169 | 2, |
| 170 | 5, |
| 171 | FALSE, |
| 172 | 22, |
| 173 | complain_overflow_bitfield, |
| 174 | bfd_elf_generic_reloc, |
| 175 | "R_NIOS2_CACHE_OPX", |
| 176 | FALSE, |
| 177 | 0x07c00000, |
| 178 | 0x07c00000, |
| 179 | FALSE), |
| 180 | |
| 181 | HOWTO (R_NIOS2_IMM6, |
| 182 | 0, |
| 183 | 2, |
| 184 | 6, |
| 185 | FALSE, |
| 186 | 6, |
| 187 | complain_overflow_bitfield, |
| 188 | bfd_elf_generic_reloc, |
| 189 | "R_NIOS2_IMM6", |
| 190 | FALSE, |
| 191 | 0x00000fc0, |
| 192 | 0x00000fc0, |
| 193 | FALSE), |
| 194 | |
| 195 | HOWTO (R_NIOS2_IMM8, |
| 196 | 0, |
| 197 | 2, |
| 198 | 8, |
| 199 | FALSE, |
| 200 | 6, |
| 201 | complain_overflow_bitfield, |
| 202 | bfd_elf_generic_reloc, |
| 203 | "R_NIOS2_IMM8", |
| 204 | FALSE, |
| 205 | 0x00003fc0, |
| 206 | 0x00003fc0, |
| 207 | FALSE), |
| 208 | |
| 209 | HOWTO (R_NIOS2_HI16, |
| 210 | 0, |
| 211 | 2, |
| 212 | 32, |
| 213 | FALSE, |
| 214 | 6, |
| 215 | complain_overflow_dont, |
| 216 | nios2_elf32_hi16_relocate, |
| 217 | "R_NIOS2_HI16", |
| 218 | FALSE, |
| 219 | 0x003fffc0, |
| 220 | 0x003fffc0, |
| 221 | FALSE), |
| 222 | |
| 223 | HOWTO (R_NIOS2_LO16, |
| 224 | 0, |
| 225 | 2, |
| 226 | 32, |
| 227 | FALSE, |
| 228 | 6, |
| 229 | complain_overflow_dont, |
| 230 | nios2_elf32_lo16_relocate, |
| 231 | "R_NIOS2_LO16", |
| 232 | FALSE, |
| 233 | 0x003fffc0, |
| 234 | 0x003fffc0, |
| 235 | FALSE), |
| 236 | |
| 237 | HOWTO (R_NIOS2_HIADJ16, |
| 238 | 0, |
| 239 | 2, |
| 240 | 32, |
| 241 | FALSE, |
| 242 | 6, |
| 243 | complain_overflow_dont, |
| 244 | nios2_elf32_hiadj16_relocate, |
| 245 | "R_NIOS2_HIADJ16", |
| 246 | FALSE, |
| 247 | 0x003fffc0, |
| 248 | 0x003fffc0, |
| 249 | FALSE), |
| 250 | |
| 251 | HOWTO (R_NIOS2_BFD_RELOC_32, |
| 252 | 0, |
| 253 | 2, /* long */ |
| 254 | 32, |
| 255 | FALSE, |
| 256 | 0, |
| 257 | complain_overflow_dont, |
| 258 | bfd_elf_generic_reloc, |
| 259 | "R_NIOS2_BFD_RELOC32", |
| 260 | FALSE, |
| 261 | 0xffffffff, |
| 262 | 0xffffffff, |
| 263 | FALSE), |
| 264 | |
| 265 | HOWTO (R_NIOS2_BFD_RELOC_16, |
| 266 | 0, |
| 267 | 1, /* short */ |
| 268 | 16, |
| 269 | FALSE, |
| 270 | 0, |
| 271 | complain_overflow_bitfield, |
| 272 | bfd_elf_generic_reloc, |
| 273 | "R_NIOS2_BFD_RELOC16", |
| 274 | FALSE, |
| 275 | 0x0000ffff, |
| 276 | 0x0000ffff, |
| 277 | FALSE), |
| 278 | |
| 279 | HOWTO (R_NIOS2_BFD_RELOC_8, |
| 280 | 0, |
| 281 | 0, /* byte */ |
| 282 | 8, |
| 283 | FALSE, |
| 284 | 0, |
| 285 | complain_overflow_bitfield, |
| 286 | bfd_elf_generic_reloc, |
| 287 | "R_NIOS2_BFD_RELOC8", |
| 288 | FALSE, |
| 289 | 0x000000ff, |
| 290 | 0x000000ff, |
| 291 | FALSE), |
| 292 | |
| 293 | HOWTO (R_NIOS2_GPREL, |
| 294 | 0, |
| 295 | 2, |
| 296 | 32, |
| 297 | FALSE, |
| 298 | 6, |
| 299 | complain_overflow_dont, |
| 300 | nios2_elf32_gprel_relocate, |
| 301 | "R_NIOS2_GPREL", |
| 302 | FALSE, |
| 303 | 0x003fffc0, |
| 304 | 0x003fffc0, |
| 305 | FALSE), |
| 306 | |
| 307 | HOWTO (R_NIOS2_GNU_VTINHERIT, |
| 308 | 0, |
| 309 | 2, /* short */ |
| 310 | 0, |
| 311 | FALSE, |
| 312 | 0, |
| 313 | complain_overflow_dont, |
| 314 | NULL, |
| 315 | "R_NIOS2_GNU_VTINHERIT", |
| 316 | FALSE, |
| 317 | 0, |
| 318 | 0, |
| 319 | FALSE), |
| 320 | |
| 321 | HOWTO (R_NIOS2_GNU_VTENTRY, |
| 322 | 0, |
| 323 | 2, /* byte */ |
| 324 | 0, |
| 325 | FALSE, |
| 326 | 0, |
| 327 | complain_overflow_dont, |
| 328 | _bfd_elf_rel_vtable_reloc_fn, |
| 329 | "R_NIOS2_GNU_VTENTRY", |
| 330 | FALSE, |
| 331 | 0, |
| 332 | 0, |
| 333 | FALSE), |
| 334 | |
| 335 | HOWTO (R_NIOS2_UJMP, |
| 336 | 0, |
| 337 | 2, |
| 338 | 32, |
| 339 | FALSE, |
| 340 | 6, |
| 341 | complain_overflow_dont, |
| 342 | nios2_elf32_ujmp_relocate, |
| 343 | "R_NIOS2_UJMP", |
| 344 | FALSE, |
| 345 | 0x003fffc0, |
| 346 | 0x003fffc0, |
| 347 | FALSE), |
| 348 | |
| 349 | HOWTO (R_NIOS2_CJMP, |
| 350 | 0, |
| 351 | 2, |
| 352 | 32, |
| 353 | FALSE, |
| 354 | 6, |
| 355 | complain_overflow_dont, |
| 356 | nios2_elf32_cjmp_relocate, |
| 357 | "R_NIOS2_CJMP", |
| 358 | FALSE, |
| 359 | 0x003fffc0, |
| 360 | 0x003fffc0, |
| 361 | FALSE), |
| 362 | |
| 363 | HOWTO (R_NIOS2_CALLR, |
| 364 | 0, |
| 365 | 2, |
| 366 | 32, |
| 367 | FALSE, |
| 368 | 6, |
| 369 | complain_overflow_dont, |
| 370 | nios2_elf32_callr_relocate, |
| 371 | "R_NIOS2_CALLR", |
| 372 | FALSE, |
| 373 | 0x003fffc0, |
| 374 | 0x003fffc0, |
| 375 | FALSE), |
| 376 | |
| 377 | HOWTO (R_NIOS2_ALIGN, |
| 378 | 0, |
| 379 | 2, |
| 380 | 0, |
| 381 | FALSE, |
| 382 | 0, |
| 383 | complain_overflow_dont, |
| 384 | nios2_elf32_ignore_reloc, |
| 385 | "R_NIOS2_ALIGN", |
| 386 | FALSE, |
| 387 | 0, |
| 388 | 0, |
| 389 | TRUE), |
| 390 | |
| 391 | |
| 392 | HOWTO (R_NIOS2_GOT16, |
| 393 | 0, |
| 394 | 2, |
| 395 | 16, |
| 396 | FALSE, |
| 397 | 6, |
| 398 | complain_overflow_bitfield, |
| 399 | bfd_elf_generic_reloc, |
| 400 | "R_NIOS2_GOT16", |
| 401 | FALSE, |
| 402 | 0x003fffc0, |
| 403 | 0x003fffc0, |
| 404 | FALSE), |
| 405 | |
| 406 | HOWTO (R_NIOS2_CALL16, |
| 407 | 0, |
| 408 | 2, |
| 409 | 16, |
| 410 | FALSE, |
| 411 | 6, |
| 412 | complain_overflow_bitfield, |
| 413 | bfd_elf_generic_reloc, |
| 414 | "R_NIOS2_CALL16", |
| 415 | FALSE, |
| 416 | 0x003fffc0, |
| 417 | 0x003fffc0, |
| 418 | FALSE), |
| 419 | |
| 420 | HOWTO (R_NIOS2_GOTOFF_LO, |
| 421 | 0, |
| 422 | 2, |
| 423 | 16, |
| 424 | FALSE, |
| 425 | 6, |
| 426 | complain_overflow_dont, |
| 427 | bfd_elf_generic_reloc, |
| 428 | "R_NIOS2_GOTOFF_LO", |
| 429 | FALSE, |
| 430 | 0x003fffc0, |
| 431 | 0x003fffc0, |
| 432 | FALSE), |
| 433 | |
| 434 | HOWTO (R_NIOS2_GOTOFF_HA, |
| 435 | 0, |
| 436 | 2, |
| 437 | 16, |
| 438 | FALSE, |
| 439 | 6, |
| 440 | complain_overflow_dont, |
| 441 | bfd_elf_generic_reloc, |
| 442 | "R_NIOS2_GOTOFF_HA", |
| 443 | FALSE, |
| 444 | 0x003fffc0, |
| 445 | 0x003fffc0, |
| 446 | FALSE), |
| 447 | |
| 448 | HOWTO (R_NIOS2_PCREL_LO, |
| 449 | 0, |
| 450 | 2, |
| 451 | 16, |
| 452 | TRUE, |
| 453 | 6, |
| 454 | complain_overflow_dont, |
| 455 | nios2_elf32_pcrel_lo16_relocate, |
| 456 | "R_NIOS2_PCREL_LO", |
| 457 | FALSE, |
| 458 | 0x003fffc0, |
| 459 | 0x003fffc0, |
| 460 | TRUE), |
| 461 | |
| 462 | HOWTO (R_NIOS2_PCREL_HA, |
| 463 | 0, |
| 464 | 2, |
| 465 | 16, |
| 466 | FALSE, /* This is a PC-relative relocation, but we need to subtract |
| 467 | PC ourselves before the HIADJ. */ |
| 468 | 6, |
| 469 | complain_overflow_dont, |
| 470 | nios2_elf32_pcrel_hiadj16_relocate, |
| 471 | "R_NIOS2_PCREL_HA", |
| 472 | FALSE, |
| 473 | 0x003fffc0, |
| 474 | 0x003fffc0, |
| 475 | TRUE), |
| 476 | |
| 477 | HOWTO (R_NIOS2_TLS_GD16, |
| 478 | 0, |
| 479 | 2, |
| 480 | 16, |
| 481 | FALSE, |
| 482 | 6, |
| 483 | complain_overflow_bitfield, |
| 484 | bfd_elf_generic_reloc, |
| 485 | "R_NIOS2_TLS_GD16", |
| 486 | FALSE, |
| 487 | 0x003fffc0, |
| 488 | 0x003fffc0, |
| 489 | FALSE), |
| 490 | |
| 491 | HOWTO (R_NIOS2_TLS_LDM16, |
| 492 | 0, |
| 493 | 2, |
| 494 | 16, |
| 495 | FALSE, |
| 496 | 6, |
| 497 | complain_overflow_bitfield, |
| 498 | bfd_elf_generic_reloc, |
| 499 | "R_NIOS2_TLS_LDM16", |
| 500 | FALSE, |
| 501 | 0x003fffc0, |
| 502 | 0x003fffc0, |
| 503 | FALSE), |
| 504 | |
| 505 | HOWTO (R_NIOS2_TLS_LDO16, |
| 506 | 0, |
| 507 | 2, |
| 508 | 16, |
| 509 | FALSE, |
| 510 | 6, |
| 511 | complain_overflow_bitfield, |
| 512 | bfd_elf_generic_reloc, |
| 513 | "R_NIOS2_TLS_LDO16", |
| 514 | FALSE, |
| 515 | 0x003fffc0, |
| 516 | 0x003fffc0, |
| 517 | FALSE), |
| 518 | |
| 519 | HOWTO (R_NIOS2_TLS_IE16, |
| 520 | 0, |
| 521 | 2, |
| 522 | 16, |
| 523 | FALSE, |
| 524 | 6, |
| 525 | complain_overflow_bitfield, |
| 526 | bfd_elf_generic_reloc, |
| 527 | "R_NIOS2_TLS_IE16", |
| 528 | FALSE, |
| 529 | 0x003fffc0, |
| 530 | 0x003fffc0, |
| 531 | FALSE), |
| 532 | |
| 533 | HOWTO (R_NIOS2_TLS_LE16, |
| 534 | 0, |
| 535 | 2, |
| 536 | 16, |
| 537 | FALSE, |
| 538 | 6, |
| 539 | complain_overflow_bitfield, |
| 540 | bfd_elf_generic_reloc, |
| 541 | "R_NIOS2_TLS_LE16", |
| 542 | FALSE, |
| 543 | 0x003fffc0, |
| 544 | 0x003fffc0, |
| 545 | FALSE), |
| 546 | |
| 547 | HOWTO (R_NIOS2_TLS_DTPMOD, |
| 548 | 0, |
| 549 | 2, |
| 550 | 32, |
| 551 | FALSE, |
| 552 | 0, |
| 553 | complain_overflow_dont, |
| 554 | bfd_elf_generic_reloc, |
| 555 | "R_NIOS2_TLS_DTPMOD", |
| 556 | FALSE, |
| 557 | 0xffffffff, |
| 558 | 0xffffffff, |
| 559 | FALSE), |
| 560 | |
| 561 | HOWTO (R_NIOS2_TLS_DTPREL, |
| 562 | 0, |
| 563 | 2, |
| 564 | 32, |
| 565 | FALSE, |
| 566 | 0, |
| 567 | complain_overflow_dont, |
| 568 | bfd_elf_generic_reloc, |
| 569 | "R_NIOS2_TLS_DTPREL", |
| 570 | FALSE, |
| 571 | 0xffffffff, |
| 572 | 0xffffffff, |
| 573 | FALSE), |
| 574 | |
| 575 | HOWTO (R_NIOS2_TLS_TPREL, |
| 576 | 0, |
| 577 | 2, |
| 578 | 32, |
| 579 | FALSE, |
| 580 | 0, |
| 581 | complain_overflow_dont, |
| 582 | bfd_elf_generic_reloc, |
| 583 | "R_NIOS2_TLS_TPREL", |
| 584 | FALSE, |
| 585 | 0xffffffff, |
| 586 | 0xffffffff, |
| 587 | FALSE), |
| 588 | |
| 589 | HOWTO (R_NIOS2_COPY, |
| 590 | 0, |
| 591 | 2, |
| 592 | 32, |
| 593 | FALSE, |
| 594 | 0, |
| 595 | complain_overflow_dont, |
| 596 | bfd_elf_generic_reloc, |
| 597 | "R_NIOS2_COPY", |
| 598 | FALSE, |
| 599 | 0, |
| 600 | 0, |
| 601 | FALSE), |
| 602 | |
| 603 | HOWTO (R_NIOS2_GLOB_DAT, |
| 604 | 0, |
| 605 | 2, |
| 606 | 32, |
| 607 | FALSE, |
| 608 | 0, |
| 609 | complain_overflow_dont, |
| 610 | bfd_elf_generic_reloc, |
| 611 | "R_NIOS2_GLOB_DAT", |
| 612 | FALSE, |
| 613 | 0xffffffff, |
| 614 | 0xffffffff, |
| 615 | FALSE), |
| 616 | |
| 617 | HOWTO (R_NIOS2_JUMP_SLOT, |
| 618 | 0, |
| 619 | 2, |
| 620 | 32, |
| 621 | FALSE, |
| 622 | 0, |
| 623 | complain_overflow_dont, |
| 624 | bfd_elf_generic_reloc, |
| 625 | "R_NIOS2_JUMP_SLOT", |
| 626 | FALSE, |
| 627 | 0xffffffff, |
| 628 | 0xffffffff, |
| 629 | FALSE), |
| 630 | |
| 631 | HOWTO (R_NIOS2_RELATIVE, |
| 632 | 0, |
| 633 | 2, |
| 634 | 32, |
| 635 | FALSE, |
| 636 | 0, |
| 637 | complain_overflow_dont, |
| 638 | bfd_elf_generic_reloc, |
| 639 | "R_NIOS2_RELATIVE", |
| 640 | FALSE, |
| 641 | 0xffffffff, |
| 642 | 0xffffffff, |
| 643 | FALSE), |
| 644 | |
| 645 | HOWTO (R_NIOS2_GOTOFF, |
| 646 | 0, |
| 647 | 2, |
| 648 | 32, |
| 649 | FALSE, |
| 650 | 0, |
| 651 | complain_overflow_dont, |
| 652 | bfd_elf_generic_reloc, |
| 653 | "R_NIOS2_GOTOFF", |
| 654 | FALSE, |
| 655 | 0xffffffff, |
| 656 | 0xffffffff, |
| 657 | FALSE), |
| 658 | |
| 659 | HOWTO (R_NIOS2_CALL26_NOAT, /* type */ |
| 660 | 2, /* rightshift */ |
| 661 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 662 | 26, /* bitsize */ |
| 663 | FALSE, /* pc_relative */ |
| 664 | 6, /* bitpos */ |
| 665 | complain_overflow_dont, /* complain on overflow */ |
| 666 | nios2_elf32_call26_relocate, /* special function */ |
| 667 | "R_NIOS2_CALL26_NOAT", /* name */ |
| 668 | FALSE, /* partial_inplace */ |
| 669 | 0xffffffc0, /* src_mask */ |
| 670 | 0xffffffc0, /* dst_mask */ |
| 671 | FALSE), /* pcrel_offset */ |
| 672 | |
| 673 | HOWTO (R_NIOS2_GOT_LO, |
| 674 | 0, |
| 675 | 2, |
| 676 | 16, |
| 677 | FALSE, |
| 678 | 6, |
| 679 | complain_overflow_dont, |
| 680 | bfd_elf_generic_reloc, |
| 681 | "R_NIOS2_GOT_LO", |
| 682 | FALSE, |
| 683 | 0x003fffc0, |
| 684 | 0x003fffc0, |
| 685 | FALSE), |
| 686 | |
| 687 | HOWTO (R_NIOS2_GOT_HA, |
| 688 | 0, |
| 689 | 2, |
| 690 | 16, |
| 691 | FALSE, |
| 692 | 6, |
| 693 | complain_overflow_dont, |
| 694 | bfd_elf_generic_reloc, |
| 695 | "R_NIOS2_GOT_HA", |
| 696 | FALSE, |
| 697 | 0x003fffc0, |
| 698 | 0x003fffc0, |
| 699 | FALSE), |
| 700 | |
| 701 | HOWTO (R_NIOS2_CALL_LO, |
| 702 | 0, |
| 703 | 2, |
| 704 | 16, |
| 705 | FALSE, |
| 706 | 6, |
| 707 | complain_overflow_dont, |
| 708 | bfd_elf_generic_reloc, |
| 709 | "R_NIOS2_CALL_LO", |
| 710 | FALSE, |
| 711 | 0x003fffc0, |
| 712 | 0x003fffc0, |
| 713 | FALSE), |
| 714 | |
| 715 | HOWTO (R_NIOS2_CALL_HA, |
| 716 | 0, |
| 717 | 2, |
| 718 | 16, |
| 719 | FALSE, |
| 720 | 6, |
| 721 | complain_overflow_dont, |
| 722 | bfd_elf_generic_reloc, |
| 723 | "R_NIOS2_CALL_HA", |
| 724 | FALSE, |
| 725 | 0x003fffc0, |
| 726 | 0x003fffc0, |
| 727 | FALSE), |
| 728 | |
| 729 | /* Add other relocations here. */ |
| 730 | }; |
| 731 | |
| 732 | static unsigned char elf_code_to_howto_index[R_NIOS2_ILLEGAL + 1]; |
| 733 | |
| 734 | /* Return the howto for relocation RTYPE. */ |
| 735 | static reloc_howto_type * |
| 736 | lookup_howto (unsigned int rtype) |
| 737 | { |
| 738 | static int initialized = 0; |
| 739 | int i; |
| 740 | int howto_tbl_size = (int) (sizeof (elf_nios2_howto_table_rel) |
| 741 | / sizeof (elf_nios2_howto_table_rel[0])); |
| 742 | |
| 743 | if (!initialized) |
| 744 | { |
| 745 | initialized = 1; |
| 746 | memset (elf_code_to_howto_index, 0xff, |
| 747 | sizeof (elf_code_to_howto_index)); |
| 748 | for (i = 0; i < howto_tbl_size; i++) |
| 749 | elf_code_to_howto_index[elf_nios2_howto_table_rel[i].type] = i; |
| 750 | } |
| 751 | |
| 752 | BFD_ASSERT (rtype <= R_NIOS2_ILLEGAL); |
| 753 | i = elf_code_to_howto_index[rtype]; |
| 754 | if (i >= howto_tbl_size) |
| 755 | return 0; |
| 756 | return elf_nios2_howto_table_rel + i; |
| 757 | } |
| 758 | |
| 759 | /* Map for converting BFD reloc types to Nios II reloc types. */ |
| 760 | struct elf_reloc_map |
| 761 | { |
| 762 | bfd_reloc_code_real_type bfd_val; |
| 763 | enum elf_nios2_reloc_type elf_val; |
| 764 | }; |
| 765 | |
| 766 | static const struct elf_reloc_map nios2_reloc_map[] = { |
| 767 | {BFD_RELOC_NONE, R_NIOS2_NONE}, |
| 768 | {BFD_RELOC_NIOS2_S16, R_NIOS2_S16}, |
| 769 | {BFD_RELOC_NIOS2_U16, R_NIOS2_U16}, |
| 770 | {BFD_RELOC_16_PCREL, R_NIOS2_PCREL16}, |
| 771 | {BFD_RELOC_NIOS2_CALL26, R_NIOS2_CALL26}, |
| 772 | {BFD_RELOC_NIOS2_IMM5, R_NIOS2_IMM5}, |
| 773 | {BFD_RELOC_NIOS2_CACHE_OPX, R_NIOS2_CACHE_OPX}, |
| 774 | {BFD_RELOC_NIOS2_IMM6, R_NIOS2_IMM6}, |
| 775 | {BFD_RELOC_NIOS2_IMM8, R_NIOS2_IMM8}, |
| 776 | {BFD_RELOC_NIOS2_HI16, R_NIOS2_HI16}, |
| 777 | {BFD_RELOC_NIOS2_LO16, R_NIOS2_LO16}, |
| 778 | {BFD_RELOC_NIOS2_HIADJ16, R_NIOS2_HIADJ16}, |
| 779 | {BFD_RELOC_32, R_NIOS2_BFD_RELOC_32}, |
| 780 | {BFD_RELOC_16, R_NIOS2_BFD_RELOC_16}, |
| 781 | {BFD_RELOC_8, R_NIOS2_BFD_RELOC_8}, |
| 782 | {BFD_RELOC_NIOS2_GPREL, R_NIOS2_GPREL}, |
| 783 | {BFD_RELOC_VTABLE_INHERIT, R_NIOS2_GNU_VTINHERIT}, |
| 784 | {BFD_RELOC_VTABLE_ENTRY, R_NIOS2_GNU_VTENTRY}, |
| 785 | {BFD_RELOC_NIOS2_UJMP, R_NIOS2_UJMP}, |
| 786 | {BFD_RELOC_NIOS2_CJMP, R_NIOS2_CJMP}, |
| 787 | {BFD_RELOC_NIOS2_CALLR, R_NIOS2_CALLR}, |
| 788 | {BFD_RELOC_NIOS2_ALIGN, R_NIOS2_ALIGN}, |
| 789 | {BFD_RELOC_NIOS2_GOT16, R_NIOS2_GOT16}, |
| 790 | {BFD_RELOC_NIOS2_CALL16, R_NIOS2_CALL16}, |
| 791 | {BFD_RELOC_NIOS2_GOTOFF_LO, R_NIOS2_GOTOFF_LO}, |
| 792 | {BFD_RELOC_NIOS2_GOTOFF_HA, R_NIOS2_GOTOFF_HA}, |
| 793 | {BFD_RELOC_NIOS2_PCREL_LO, R_NIOS2_PCREL_LO}, |
| 794 | {BFD_RELOC_NIOS2_PCREL_HA, R_NIOS2_PCREL_HA}, |
| 795 | {BFD_RELOC_NIOS2_TLS_GD16, R_NIOS2_TLS_GD16}, |
| 796 | {BFD_RELOC_NIOS2_TLS_LDM16, R_NIOS2_TLS_LDM16}, |
| 797 | {BFD_RELOC_NIOS2_TLS_LDO16, R_NIOS2_TLS_LDO16}, |
| 798 | {BFD_RELOC_NIOS2_TLS_IE16, R_NIOS2_TLS_IE16}, |
| 799 | {BFD_RELOC_NIOS2_TLS_LE16, R_NIOS2_TLS_LE16}, |
| 800 | {BFD_RELOC_NIOS2_TLS_DTPMOD, R_NIOS2_TLS_DTPMOD}, |
| 801 | {BFD_RELOC_NIOS2_TLS_DTPREL, R_NIOS2_TLS_DTPREL}, |
| 802 | {BFD_RELOC_NIOS2_TLS_TPREL, R_NIOS2_TLS_TPREL}, |
| 803 | {BFD_RELOC_NIOS2_COPY, R_NIOS2_COPY}, |
| 804 | {BFD_RELOC_NIOS2_GLOB_DAT, R_NIOS2_GLOB_DAT}, |
| 805 | {BFD_RELOC_NIOS2_JUMP_SLOT, R_NIOS2_JUMP_SLOT}, |
| 806 | {BFD_RELOC_NIOS2_RELATIVE, R_NIOS2_RELATIVE}, |
| 807 | {BFD_RELOC_NIOS2_GOTOFF, R_NIOS2_GOTOFF}, |
| 808 | {BFD_RELOC_NIOS2_CALL26_NOAT, R_NIOS2_CALL26_NOAT}, |
| 809 | {BFD_RELOC_NIOS2_GOT_LO, R_NIOS2_GOT_LO}, |
| 810 | {BFD_RELOC_NIOS2_GOT_HA, R_NIOS2_GOT_HA}, |
| 811 | {BFD_RELOC_NIOS2_CALL_LO, R_NIOS2_CALL_LO}, |
| 812 | {BFD_RELOC_NIOS2_CALL_HA, R_NIOS2_CALL_HA}, |
| 813 | }; |
| 814 | |
| 815 | enum elf32_nios2_stub_type |
| 816 | { |
| 817 | nios2_stub_call26_before, |
| 818 | nios2_stub_call26_after, |
| 819 | nios2_stub_none |
| 820 | }; |
| 821 | |
| 822 | struct elf32_nios2_stub_hash_entry |
| 823 | { |
| 824 | /* Base hash table entry structure. */ |
| 825 | struct bfd_hash_entry bh_root; |
| 826 | |
| 827 | /* The stub section. */ |
| 828 | asection *stub_sec; |
| 829 | |
| 830 | /* Offset within stub_sec of the beginning of this stub. */ |
| 831 | bfd_vma stub_offset; |
| 832 | |
| 833 | /* Given the symbol's value and its section we can determine its final |
| 834 | value when building the stubs (so the stub knows where to jump. */ |
| 835 | bfd_vma target_value; |
| 836 | asection *target_section; |
| 837 | |
| 838 | enum elf32_nios2_stub_type stub_type; |
| 839 | |
| 840 | /* The symbol table entry, if any, that this was derived from. */ |
| 841 | struct elf32_nios2_link_hash_entry *hh; |
| 842 | |
| 843 | /* And the reloc addend that this was derived from. */ |
| 844 | bfd_vma addend; |
| 845 | |
| 846 | /* Where this stub is being called from, or, in the case of combined |
| 847 | stub sections, the first input section in the group. */ |
| 848 | asection *id_sec; |
| 849 | }; |
| 850 | |
| 851 | #define nios2_stub_hash_entry(ent) \ |
| 852 | ((struct elf32_nios2_stub_hash_entry *)(ent)) |
| 853 | |
| 854 | #define nios2_stub_hash_lookup(table, string, create, copy) \ |
| 855 | ((struct elf32_nios2_stub_hash_entry *) \ |
| 856 | bfd_hash_lookup ((table), (string), (create), (copy))) |
| 857 | |
| 858 | |
| 859 | /* The Nios II linker needs to keep track of the number of relocs that it |
| 860 | decides to copy as dynamic relocs in check_relocs for each symbol. |
| 861 | This is so that it can later discard them if they are found to be |
| 862 | unnecessary. We store the information in a field extending the |
| 863 | regular ELF linker hash table. */ |
| 864 | |
| 865 | struct elf32_nios2_dyn_relocs |
| 866 | { |
| 867 | struct elf32_nios2_dyn_relocs *next; |
| 868 | |
| 869 | /* The input section of the reloc. */ |
| 870 | asection *sec; |
| 871 | |
| 872 | /* Total number of relocs copied for the input section. */ |
| 873 | bfd_size_type count; |
| 874 | |
| 875 | /* Number of pc-relative relocs copied for the input section. */ |
| 876 | bfd_size_type pc_count; |
| 877 | }; |
| 878 | |
| 879 | /* Nios II ELF linker hash entry. */ |
| 880 | |
| 881 | struct elf32_nios2_link_hash_entry |
| 882 | { |
| 883 | struct elf_link_hash_entry root; |
| 884 | |
| 885 | /* A pointer to the most recently used stub hash entry against this |
| 886 | symbol. */ |
| 887 | struct elf32_nios2_stub_hash_entry *hsh_cache; |
| 888 | |
| 889 | /* Track dynamic relocs copied for this symbol. */ |
| 890 | struct elf32_nios2_dyn_relocs *dyn_relocs; |
| 891 | |
| 892 | #define GOT_UNKNOWN 0 |
| 893 | #define GOT_NORMAL 1 |
| 894 | #define GOT_TLS_GD 2 |
| 895 | #define GOT_TLS_IE 4 |
| 896 | unsigned char tls_type; |
| 897 | |
| 898 | /* We need to detect and take special action for symbols which are only |
| 899 | referenced with %call() and not with %got(). Such symbols do not need |
| 900 | a dynamic GOT reloc in shared objects, only a dynamic PLT reloc. Lazy |
| 901 | linking will not work if the dynamic GOT reloc exists. |
| 902 | To check for this condition efficiently, we compare got_types_used against |
| 903 | CALL_USED, meaning |
| 904 | (got_types_used & (GOT_USED | CALL_USED)) == CALL_USED. |
| 905 | */ |
| 906 | #define GOT_USED 1 |
| 907 | #define CALL_USED 2 |
| 908 | unsigned char got_types_used; |
| 909 | }; |
| 910 | |
| 911 | #define elf32_nios2_hash_entry(ent) \ |
| 912 | ((struct elf32_nios2_link_hash_entry *) (ent)) |
| 913 | |
| 914 | /* Get the Nios II elf linker hash table from a link_info structure. */ |
| 915 | #define elf32_nios2_hash_table(info) \ |
| 916 | ((struct elf32_nios2_link_hash_table *) ((info)->hash)) |
| 917 | |
| 918 | /* Nios II ELF linker hash table. */ |
| 919 | struct elf32_nios2_link_hash_table |
| 920 | { |
| 921 | /* The main hash table. */ |
| 922 | struct elf_link_hash_table root; |
| 923 | |
| 924 | /* The stub hash table. */ |
| 925 | struct bfd_hash_table bstab; |
| 926 | |
| 927 | /* Linker stub bfd. */ |
| 928 | bfd *stub_bfd; |
| 929 | |
| 930 | /* Linker call-backs. */ |
| 931 | asection * (*add_stub_section) (const char *, asection *, bfd_boolean); |
| 932 | void (*layout_sections_again) (void); |
| 933 | |
| 934 | /* Array to keep track of which stub sections have been created, and |
| 935 | information on stub grouping. */ |
| 936 | struct map_stub |
| 937 | { |
| 938 | /* These are the section to which stubs in the group will be |
| 939 | attached. */ |
| 940 | asection *first_sec, *last_sec; |
| 941 | /* The stub sections. There might be stubs inserted either before |
| 942 | or after the real section.*/ |
| 943 | asection *first_stub_sec, *last_stub_sec; |
| 944 | } *stub_group; |
| 945 | |
| 946 | /* Assorted information used by nios2_elf32_size_stubs. */ |
| 947 | unsigned int bfd_count; |
| 948 | int top_index; |
| 949 | asection **input_list; |
| 950 | Elf_Internal_Sym **all_local_syms; |
| 951 | |
| 952 | /* Short-cuts to get to dynamic linker sections. */ |
| 953 | asection *sdynbss; |
| 954 | asection *srelbss; |
| 955 | asection *sbss; |
| 956 | |
| 957 | /* GOT pointer symbol _gp_got. */ |
| 958 | struct elf_link_hash_entry *h_gp_got; |
| 959 | |
| 960 | union { |
| 961 | bfd_signed_vma refcount; |
| 962 | bfd_vma offset; |
| 963 | } tls_ldm_got; |
| 964 | |
| 965 | /* Small local sym cache. */ |
| 966 | struct sym_cache sym_cache; |
| 967 | |
| 968 | bfd_vma res_n_size; |
| 969 | }; |
| 970 | |
| 971 | struct nios2_elf32_obj_tdata |
| 972 | { |
| 973 | struct elf_obj_tdata root; |
| 974 | |
| 975 | /* tls_type for each local got entry. */ |
| 976 | char *local_got_tls_type; |
| 977 | |
| 978 | /* TRUE if TLS GD relocs have been seen for this object. */ |
| 979 | bfd_boolean has_tlsgd; |
| 980 | }; |
| 981 | |
| 982 | #define elf32_nios2_tdata(abfd) \ |
| 983 | ((struct nios2_elf32_obj_tdata *) (abfd)->tdata.any) |
| 984 | |
| 985 | #define elf32_nios2_local_got_tls_type(abfd) \ |
| 986 | (elf32_nios2_tdata (abfd)->local_got_tls_type) |
| 987 | |
| 988 | /* The name of the dynamic interpreter. This is put in the .interp |
| 989 | section. */ |
| 990 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" |
| 991 | |
| 992 | /* PLT implementation for position-dependent code. */ |
| 993 | static const bfd_vma nios2_plt_entry[] = { /* .PLTn: */ |
| 994 | 0x03c00034, /* movhi r15, %hiadj(plt_got_slot_address) */ |
| 995 | 0x7bc00017, /* ldw r15, %lo(plt_got_slot_address)(r15) */ |
| 996 | 0x7800683a /* jmp r15 */ |
| 997 | }; |
| 998 | |
| 999 | static const bfd_vma nios2_plt0_entry[] = { /* .PLTresolve */ |
| 1000 | 0x03800034, /* movhi r14, %hiadj(res_0) */ |
| 1001 | 0x73800004, /* addi r14, r14, %lo(res_0) */ |
| 1002 | 0x7b9fc83a, /* sub r15, r15, r14 */ |
| 1003 | 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */ |
| 1004 | 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */ |
| 1005 | 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */ |
| 1006 | 0x6800683a /* jmp r13 */ |
| 1007 | }; |
| 1008 | |
| 1009 | /* PLT implementation for position-independent code. */ |
| 1010 | static const bfd_vma nios2_so_plt_entry[] = { /* .PLTn */ |
| 1011 | 0x03c00034, /* movhi r15, %hiadj(index * 4) */ |
| 1012 | 0x7bc00004, /* addi r15, r15, %lo(index * 4) */ |
| 1013 | 0x00000006 /* br .PLTresolve */ |
| 1014 | }; |
| 1015 | |
| 1016 | static const bfd_vma nios2_so_plt0_entry[] = { /* .PLTresolve */ |
| 1017 | 0x001ce03a, /* nextpc r14 */ |
| 1018 | 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */ |
| 1019 | 0x6b9b883a, /* add r13, r13, r14 */ |
| 1020 | 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */ |
| 1021 | 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */ |
| 1022 | 0x6800683a /* jmp r13 */ |
| 1023 | }; |
| 1024 | |
| 1025 | /* CALL26 stub. */ |
| 1026 | static const bfd_vma nios2_call26_stub_entry[] = { |
| 1027 | 0x00400034, /* orhi at, r0, %hiadj(dest) */ |
| 1028 | 0x08400004, /* addi at, at, %lo(dest) */ |
| 1029 | 0x0800683a /* jmp at */ |
| 1030 | }; |
| 1031 | |
| 1032 | /* Install 16-bit immediate value VALUE at offset OFFSET into section SEC. */ |
| 1033 | static void |
| 1034 | nios2_elf32_install_imm16 (asection *sec, bfd_vma offset, bfd_vma value) |
| 1035 | { |
| 1036 | bfd_vma word = bfd_get_32 (sec->owner, sec->contents + offset); |
| 1037 | |
| 1038 | BFD_ASSERT(value <= 0xffff); |
| 1039 | |
| 1040 | bfd_put_32 (sec->owner, word | ((value & 0xffff) << 6), |
| 1041 | sec->contents + offset); |
| 1042 | } |
| 1043 | |
| 1044 | /* Install COUNT 32-bit values DATA starting at offset OFFSET into |
| 1045 | section SEC. */ |
| 1046 | static void |
| 1047 | nios2_elf32_install_data (asection *sec, const bfd_vma *data, bfd_vma offset, |
| 1048 | int count) |
| 1049 | { |
| 1050 | while (count--) |
| 1051 | { |
| 1052 | bfd_put_32 (sec->owner, *data, sec->contents + offset); |
| 1053 | offset += 4; |
| 1054 | ++data; |
| 1055 | } |
| 1056 | } |
| 1057 | |
| 1058 | /* The usual way of loading a 32-bit constant into a Nios II register is to |
| 1059 | load the high 16 bits in one instruction and then add the low 16 bits with |
| 1060 | a signed add. This means that the high halfword needs to be adjusted to |
| 1061 | compensate for the sign bit of the low halfword. This function returns the |
| 1062 | adjusted high halfword for a given 32-bit constant. */ |
| 1063 | static |
| 1064 | bfd_vma hiadj (bfd_vma symbol_value) |
| 1065 | { |
| 1066 | return ((symbol_value + 0x8000) >> 16) & 0xffff; |
| 1067 | } |
| 1068 | |
| 1069 | /* Implement elf_backend_grok_prstatus: |
| 1070 | Support for core dump NOTE sections. */ |
| 1071 | static bfd_boolean |
| 1072 | nios2_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| 1073 | { |
| 1074 | int offset; |
| 1075 | size_t size; |
| 1076 | |
| 1077 | switch (note->descsz) |
| 1078 | { |
| 1079 | default: |
| 1080 | return FALSE; |
| 1081 | |
| 1082 | case 212: /* Linux/Nios II */ |
| 1083 | /* pr_cursig */ |
| 1084 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
| 1085 | |
| 1086 | /* pr_pid */ |
| 1087 | elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 24); |
| 1088 | |
| 1089 | /* pr_reg */ |
| 1090 | offset = 72; |
| 1091 | size = 136; |
| 1092 | |
| 1093 | break; |
| 1094 | } |
| 1095 | |
| 1096 | /* Make a ".reg/999" section. */ |
| 1097 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 1098 | size, note->descpos + offset); |
| 1099 | } |
| 1100 | |
| 1101 | /* Implement elf_backend_grok_psinfo. */ |
| 1102 | static bfd_boolean |
| 1103 | nios2_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 1104 | { |
| 1105 | switch (note->descsz) |
| 1106 | { |
| 1107 | default: |
| 1108 | return FALSE; |
| 1109 | |
| 1110 | case 124: /* Linux/Nios II elf_prpsinfo */ |
| 1111 | elf_tdata (abfd)->core->program |
| 1112 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
| 1113 | elf_tdata (abfd)->core->command |
| 1114 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
| 1115 | } |
| 1116 | |
| 1117 | /* Note that for some reason, a spurious space is tacked |
| 1118 | onto the end of the args in some (at least one anyway) |
| 1119 | implementations, so strip it off if it exists. */ |
| 1120 | |
| 1121 | { |
| 1122 | char *command = elf_tdata (abfd)->core->command; |
| 1123 | int n = strlen (command); |
| 1124 | |
| 1125 | if (0 < n && command[n - 1] == ' ') |
| 1126 | command[n - 1] = '\0'; |
| 1127 | } |
| 1128 | |
| 1129 | return TRUE; |
| 1130 | } |
| 1131 | |
| 1132 | /* Assorted hash table functions. */ |
| 1133 | |
| 1134 | /* Initialize an entry in the stub hash table. */ |
| 1135 | static struct bfd_hash_entry * |
| 1136 | stub_hash_newfunc (struct bfd_hash_entry *entry, |
| 1137 | struct bfd_hash_table *table, |
| 1138 | const char *string) |
| 1139 | { |
| 1140 | /* Allocate the structure if it has not already been allocated by a |
| 1141 | subclass. */ |
| 1142 | if (entry == NULL) |
| 1143 | { |
| 1144 | entry = bfd_hash_allocate (table, |
| 1145 | sizeof (struct elf32_nios2_stub_hash_entry)); |
| 1146 | if (entry == NULL) |
| 1147 | return entry; |
| 1148 | } |
| 1149 | |
| 1150 | /* Call the allocation method of the superclass. */ |
| 1151 | entry = bfd_hash_newfunc (entry, table, string); |
| 1152 | if (entry != NULL) |
| 1153 | { |
| 1154 | struct elf32_nios2_stub_hash_entry *hsh; |
| 1155 | |
| 1156 | /* Initialize the local fields. */ |
| 1157 | hsh = (struct elf32_nios2_stub_hash_entry *) entry; |
| 1158 | hsh->stub_sec = NULL; |
| 1159 | hsh->stub_offset = 0; |
| 1160 | hsh->target_value = 0; |
| 1161 | hsh->target_section = NULL; |
| 1162 | hsh->stub_type = nios2_stub_none; |
| 1163 | hsh->hh = NULL; |
| 1164 | hsh->id_sec = NULL; |
| 1165 | } |
| 1166 | |
| 1167 | return entry; |
| 1168 | } |
| 1169 | |
| 1170 | /* Create an entry in a Nios II ELF linker hash table. */ |
| 1171 | static struct bfd_hash_entry * |
| 1172 | link_hash_newfunc (struct bfd_hash_entry *entry, |
| 1173 | struct bfd_hash_table *table, const char *string) |
| 1174 | { |
| 1175 | /* Allocate the structure if it has not already been allocated by a |
| 1176 | subclass. */ |
| 1177 | if (entry == NULL) |
| 1178 | { |
| 1179 | entry = bfd_hash_allocate (table, |
| 1180 | sizeof (struct elf32_nios2_link_hash_entry)); |
| 1181 | if (entry == NULL) |
| 1182 | return entry; |
| 1183 | } |
| 1184 | |
| 1185 | /* Call the allocation method of the superclass. */ |
| 1186 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| 1187 | if (entry) |
| 1188 | { |
| 1189 | struct elf32_nios2_link_hash_entry *eh; |
| 1190 | |
| 1191 | eh = (struct elf32_nios2_link_hash_entry *) entry; |
| 1192 | eh->hsh_cache = NULL; |
| 1193 | eh->dyn_relocs = NULL; |
| 1194 | eh->tls_type = GOT_UNKNOWN; |
| 1195 | eh->got_types_used = 0; |
| 1196 | } |
| 1197 | |
| 1198 | return entry; |
| 1199 | } |
| 1200 | |
| 1201 | /* Section name for stubs is the associated section name plus this |
| 1202 | string. */ |
| 1203 | #define STUB_SUFFIX ".stub" |
| 1204 | |
| 1205 | /* Build a name for an entry in the stub hash table. */ |
| 1206 | static char * |
| 1207 | nios2_stub_name (const asection *input_section, |
| 1208 | const asection *sym_sec, |
| 1209 | const struct elf32_nios2_link_hash_entry *hh, |
| 1210 | const Elf_Internal_Rela *rel, |
| 1211 | enum elf32_nios2_stub_type stub_type) |
| 1212 | { |
| 1213 | char *stub_name; |
| 1214 | bfd_size_type len; |
| 1215 | char stubpos = (stub_type == nios2_stub_call26_before) ? 'b' : 'a'; |
| 1216 | |
| 1217 | if (hh) |
| 1218 | { |
| 1219 | len = 8 + 1 + 1 + 1+ strlen (hh->root.root.root.string) + 1 + 8 + 1; |
| 1220 | stub_name = bfd_malloc (len); |
| 1221 | if (stub_name != NULL) |
| 1222 | { |
| 1223 | sprintf (stub_name, "%08x_%c_%s+%x", |
| 1224 | input_section->id & 0xffffffff, |
| 1225 | stubpos, |
| 1226 | hh->root.root.root.string, |
| 1227 | (int) rel->r_addend & 0xffffffff); |
| 1228 | } |
| 1229 | } |
| 1230 | else |
| 1231 | { |
| 1232 | len = 8 + 1 + 1 + 1+ 8 + 1 + 8 + 1 + 8 + 1; |
| 1233 | stub_name = bfd_malloc (len); |
| 1234 | if (stub_name != NULL) |
| 1235 | { |
| 1236 | sprintf (stub_name, "%08x_%c_%x:%x+%x", |
| 1237 | input_section->id & 0xffffffff, |
| 1238 | stubpos, |
| 1239 | sym_sec->id & 0xffffffff, |
| 1240 | (int) ELF32_R_SYM (rel->r_info) & 0xffffffff, |
| 1241 | (int) rel->r_addend & 0xffffffff); |
| 1242 | } |
| 1243 | } |
| 1244 | return stub_name; |
| 1245 | } |
| 1246 | |
| 1247 | /* Look up an entry in the stub hash. Stub entries are cached because |
| 1248 | creating the stub name takes a bit of time. */ |
| 1249 | static struct elf32_nios2_stub_hash_entry * |
| 1250 | nios2_get_stub_entry (const asection *input_section, |
| 1251 | const asection *sym_sec, |
| 1252 | struct elf32_nios2_link_hash_entry *hh, |
| 1253 | const Elf_Internal_Rela *rel, |
| 1254 | struct elf32_nios2_link_hash_table *htab, |
| 1255 | enum elf32_nios2_stub_type stub_type) |
| 1256 | { |
| 1257 | struct elf32_nios2_stub_hash_entry *hsh; |
| 1258 | const asection *id_sec; |
| 1259 | |
| 1260 | /* If this input section is part of a group of sections sharing one |
| 1261 | stub section, then use the id of the first/last section in the group, |
| 1262 | depending on the stub section placement relative to the group. |
| 1263 | Stub names need to include a section id, as there may well be |
| 1264 | more than one stub used to reach say, printf, and we need to |
| 1265 | distinguish between them. */ |
| 1266 | if (stub_type == nios2_stub_call26_before) |
| 1267 | id_sec = htab->stub_group[input_section->id].first_sec; |
| 1268 | else |
| 1269 | id_sec = htab->stub_group[input_section->id].last_sec; |
| 1270 | |
| 1271 | if (hh != NULL && hh->hsh_cache != NULL |
| 1272 | && hh->hsh_cache->hh == hh |
| 1273 | && hh->hsh_cache->id_sec == id_sec |
| 1274 | && hh->hsh_cache->stub_type == stub_type) |
| 1275 | { |
| 1276 | hsh = hh->hsh_cache; |
| 1277 | } |
| 1278 | else |
| 1279 | { |
| 1280 | char *stub_name; |
| 1281 | |
| 1282 | stub_name = nios2_stub_name (id_sec, sym_sec, hh, rel, stub_type); |
| 1283 | if (stub_name == NULL) |
| 1284 | return NULL; |
| 1285 | |
| 1286 | hsh = nios2_stub_hash_lookup (&htab->bstab, |
| 1287 | stub_name, FALSE, FALSE); |
| 1288 | |
| 1289 | if (hh != NULL) |
| 1290 | hh->hsh_cache = hsh; |
| 1291 | |
| 1292 | free (stub_name); |
| 1293 | } |
| 1294 | |
| 1295 | return hsh; |
| 1296 | } |
| 1297 | |
| 1298 | /* Add a new stub entry to the stub hash. Not all fields of the new |
| 1299 | stub entry are initialised. */ |
| 1300 | static struct elf32_nios2_stub_hash_entry * |
| 1301 | nios2_add_stub (const char *stub_name, |
| 1302 | asection *section, |
| 1303 | struct elf32_nios2_link_hash_table *htab, |
| 1304 | enum elf32_nios2_stub_type stub_type) |
| 1305 | { |
| 1306 | asection *link_sec; |
| 1307 | asection *stub_sec; |
| 1308 | asection **secptr, **linkptr; |
| 1309 | struct elf32_nios2_stub_hash_entry *hsh; |
| 1310 | bfd_boolean afterp; |
| 1311 | |
| 1312 | if (stub_type == nios2_stub_call26_before) |
| 1313 | { |
| 1314 | link_sec = htab->stub_group[section->id].first_sec; |
| 1315 | secptr = &(htab->stub_group[section->id].first_stub_sec); |
| 1316 | linkptr = &(htab->stub_group[link_sec->id].first_stub_sec); |
| 1317 | afterp = FALSE; |
| 1318 | } |
| 1319 | else |
| 1320 | { |
| 1321 | link_sec = htab->stub_group[section->id].last_sec; |
| 1322 | secptr = &(htab->stub_group[section->id].last_stub_sec); |
| 1323 | linkptr = &(htab->stub_group[link_sec->id].last_stub_sec); |
| 1324 | afterp = TRUE; |
| 1325 | } |
| 1326 | stub_sec = *secptr; |
| 1327 | if (stub_sec == NULL) |
| 1328 | { |
| 1329 | stub_sec = *linkptr; |
| 1330 | if (stub_sec == NULL) |
| 1331 | { |
| 1332 | size_t namelen; |
| 1333 | bfd_size_type len; |
| 1334 | char *s_name; |
| 1335 | |
| 1336 | namelen = strlen (link_sec->name); |
| 1337 | len = namelen + sizeof (STUB_SUFFIX); |
| 1338 | s_name = bfd_alloc (htab->stub_bfd, len); |
| 1339 | if (s_name == NULL) |
| 1340 | return NULL; |
| 1341 | |
| 1342 | memcpy (s_name, link_sec->name, namelen); |
| 1343 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); |
| 1344 | |
| 1345 | stub_sec = (*htab->add_stub_section) (s_name, link_sec, afterp); |
| 1346 | if (stub_sec == NULL) |
| 1347 | return NULL; |
| 1348 | *linkptr = stub_sec; |
| 1349 | } |
| 1350 | *secptr = stub_sec; |
| 1351 | } |
| 1352 | |
| 1353 | /* Enter this entry into the linker stub hash table. */ |
| 1354 | hsh = nios2_stub_hash_lookup (&htab->bstab, stub_name, |
| 1355 | TRUE, FALSE); |
| 1356 | if (hsh == NULL) |
| 1357 | { |
| 1358 | (*_bfd_error_handler) (_("%B: cannot create stub entry %s"), |
| 1359 | section->owner, |
| 1360 | stub_name); |
| 1361 | return NULL; |
| 1362 | } |
| 1363 | |
| 1364 | hsh->stub_sec = stub_sec; |
| 1365 | hsh->stub_offset = 0; |
| 1366 | hsh->id_sec = link_sec; |
| 1367 | return hsh; |
| 1368 | } |
| 1369 | |
| 1370 | /* Set up various things so that we can make a list of input sections |
| 1371 | for each output section included in the link. Returns -1 on error, |
| 1372 | 0 when no stubs will be needed, and 1 on success. */ |
| 1373 | int |
| 1374 | nios2_elf32_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info) |
| 1375 | { |
| 1376 | bfd *input_bfd; |
| 1377 | unsigned int bfd_count; |
| 1378 | int top_id, top_index; |
| 1379 | asection *section; |
| 1380 | asection **input_list, **list; |
| 1381 | bfd_size_type amt; |
| 1382 | struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info); |
| 1383 | |
| 1384 | /* Count the number of input BFDs and find the top input section id. */ |
| 1385 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; |
| 1386 | input_bfd != NULL; |
| 1387 | input_bfd = input_bfd->link.next) |
| 1388 | { |
| 1389 | bfd_count += 1; |
| 1390 | for (section = input_bfd->sections; |
| 1391 | section != NULL; |
| 1392 | section = section->next) |
| 1393 | { |
| 1394 | if (top_id < section->id) |
| 1395 | top_id = section->id; |
| 1396 | } |
| 1397 | } |
| 1398 | |
| 1399 | htab->bfd_count = bfd_count; |
| 1400 | |
| 1401 | amt = sizeof (struct map_stub) * (top_id + 1); |
| 1402 | htab->stub_group = bfd_zmalloc (amt); |
| 1403 | if (htab->stub_group == NULL) |
| 1404 | return -1; |
| 1405 | |
| 1406 | /* We can't use output_bfd->section_count here to find the top output |
| 1407 | section index as some sections may have been removed, and |
| 1408 | strip_excluded_output_sections doesn't renumber the indices. */ |
| 1409 | for (section = output_bfd->sections, top_index = 0; |
| 1410 | section != NULL; |
| 1411 | section = section->next) |
| 1412 | { |
| 1413 | if (top_index < section->index) |
| 1414 | top_index = section->index; |
| 1415 | } |
| 1416 | |
| 1417 | htab->top_index = top_index; |
| 1418 | amt = sizeof (asection *) * (top_index + 1); |
| 1419 | input_list = bfd_malloc (amt); |
| 1420 | htab->input_list = input_list; |
| 1421 | if (input_list == NULL) |
| 1422 | return -1; |
| 1423 | |
| 1424 | /* For sections we aren't interested in, mark their entries with a |
| 1425 | value we can check later. */ |
| 1426 | list = input_list + top_index; |
| 1427 | do |
| 1428 | *list = bfd_abs_section_ptr; |
| 1429 | while (list-- != input_list); |
| 1430 | |
| 1431 | for (section = output_bfd->sections; |
| 1432 | section != NULL; |
| 1433 | section = section->next) |
| 1434 | { |
| 1435 | /* FIXME: This is a bit of hack. Currently our .ctors and .dtors |
| 1436 | * have PC relative relocs in them but no code flag set. */ |
| 1437 | if (((section->flags & SEC_CODE) != 0) || |
| 1438 | strcmp(".ctors", section->name) || |
| 1439 | strcmp(".dtors", section->name)) |
| 1440 | input_list[section->index] = NULL; |
| 1441 | } |
| 1442 | |
| 1443 | return 1; |
| 1444 | } |
| 1445 | |
| 1446 | /* The linker repeatedly calls this function for each input section, |
| 1447 | in the order that input sections are linked into output sections. |
| 1448 | Build lists of input sections to determine groupings between which |
| 1449 | we may insert linker stubs. */ |
| 1450 | void |
| 1451 | nios2_elf32_next_input_section (struct bfd_link_info *info, asection *isec) |
| 1452 | { |
| 1453 | struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info); |
| 1454 | |
| 1455 | if (isec->output_section->index <= htab->top_index) |
| 1456 | { |
| 1457 | asection **list = htab->input_list + isec->output_section->index; |
| 1458 | if (*list != bfd_abs_section_ptr) |
| 1459 | { |
| 1460 | /* Steal the last_sec pointer for our list. |
| 1461 | This happens to make the list in reverse order, |
| 1462 | which is what we want. */ |
| 1463 | htab->stub_group[isec->id].last_sec = *list; |
| 1464 | *list = isec; |
| 1465 | } |
| 1466 | } |
| 1467 | } |
| 1468 | |
| 1469 | /* Segment mask for CALL26 relocation relaxation. */ |
| 1470 | #define CALL26_SEGMENT(x) ((x) & 0xf0000000) |
| 1471 | |
| 1472 | /* Fudge factor for approximate maximum size of all stubs that might |
| 1473 | be inserted by the linker. This does not actually limit the number |
| 1474 | of stubs that might be inserted, and only affects strategy for grouping |
| 1475 | and placement of stubs. Perhaps this should be computed based on number |
| 1476 | of relocations seen, or be specifiable on the command line. */ |
| 1477 | #define MAX_STUB_SECTION_SIZE 0xffff |
| 1478 | |
| 1479 | /* See whether we can group stub sections together. Grouping stub |
| 1480 | sections may result in fewer stubs. More importantly, we need to |
| 1481 | put all .init* and .fini* stubs at the end of the .init or |
| 1482 | .fini output sections respectively, because glibc splits the |
| 1483 | _init and _fini functions into multiple parts. Putting a stub in |
| 1484 | the middle of a function is not a good idea. |
| 1485 | Rather than computing groups of a maximum fixed size, for Nios II |
| 1486 | CALL26 relaxation it makes more sense to compute the groups based on |
| 1487 | sections that fit within a 256MB address segment. Also do not allow |
| 1488 | a group to span more than one output section, since different output |
| 1489 | sections might correspond to different memory banks on a bare-metal |
| 1490 | target, etc. */ |
| 1491 | static void |
| 1492 | group_sections (struct elf32_nios2_link_hash_table *htab) |
| 1493 | { |
| 1494 | asection **list = htab->input_list + htab->top_index; |
| 1495 | do |
| 1496 | { |
| 1497 | /* The list is in reverse order so we'll search backwards looking |
| 1498 | for the first section that begins in the same memory segment, |
| 1499 | marking sections along the way to point at the tail for this |
| 1500 | group. */ |
| 1501 | asection *tail = *list; |
| 1502 | if (tail == bfd_abs_section_ptr) |
| 1503 | continue; |
| 1504 | while (tail != NULL) |
| 1505 | { |
| 1506 | bfd_vma start = tail->output_section->vma + tail->output_offset; |
| 1507 | bfd_vma end = start + tail->size; |
| 1508 | bfd_vma segment = CALL26_SEGMENT (end); |
| 1509 | asection *prev; |
| 1510 | |
| 1511 | if (segment != CALL26_SEGMENT (start) |
| 1512 | || segment != CALL26_SEGMENT (end + MAX_STUB_SECTION_SIZE)) |
| 1513 | /* This section spans more than one memory segment, or is |
| 1514 | close enough to the end of the segment that adding stub |
| 1515 | sections before it might cause it to move so that it |
| 1516 | spans memory segments, or that stubs added at the end of |
| 1517 | this group might overflow into the next memory segment. |
| 1518 | Put it in a group by itself to localize the effects. */ |
| 1519 | { |
| 1520 | prev = htab->stub_group[tail->id].last_sec; |
| 1521 | htab->stub_group[tail->id].last_sec = tail; |
| 1522 | htab->stub_group[tail->id].first_sec = tail; |
| 1523 | } |
| 1524 | else |
| 1525 | /* Collect more sections for this group. */ |
| 1526 | { |
| 1527 | asection *curr, *first; |
| 1528 | for (curr = tail; ; curr = prev) |
| 1529 | { |
| 1530 | prev = htab->stub_group[curr->id].last_sec; |
| 1531 | if (!prev |
| 1532 | || tail->output_section != prev->output_section |
| 1533 | || (CALL26_SEGMENT (prev->output_section->vma |
| 1534 | + prev->output_offset) |
| 1535 | != segment)) |
| 1536 | break; |
| 1537 | } |
| 1538 | first = curr; |
| 1539 | for (curr = tail; ; curr = prev) |
| 1540 | { |
| 1541 | prev = htab->stub_group[curr->id].last_sec; |
| 1542 | htab->stub_group[curr->id].last_sec = tail; |
| 1543 | htab->stub_group[curr->id].first_sec = first; |
| 1544 | if (curr == first) |
| 1545 | break; |
| 1546 | } |
| 1547 | } |
| 1548 | |
| 1549 | /* Reset tail for the next group. */ |
| 1550 | tail = prev; |
| 1551 | } |
| 1552 | } |
| 1553 | while (list-- != htab->input_list); |
| 1554 | free (htab->input_list); |
| 1555 | } |
| 1556 | |
| 1557 | /* Determine the type of stub needed, if any, for a call. */ |
| 1558 | static enum elf32_nios2_stub_type |
| 1559 | nios2_type_of_stub (asection *input_sec, |
| 1560 | const Elf_Internal_Rela *rel, |
| 1561 | struct elf32_nios2_link_hash_entry *hh, |
| 1562 | struct elf32_nios2_link_hash_table *htab, |
| 1563 | bfd_vma destination, |
| 1564 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 1565 | { |
| 1566 | bfd_vma location, segment, start, end; |
| 1567 | asection *s0, *s1, *s; |
| 1568 | |
| 1569 | if (hh != NULL && |
| 1570 | !(hh->root.root.type == bfd_link_hash_defined |
| 1571 | || hh->root.root.type == bfd_link_hash_defweak)) |
| 1572 | return nios2_stub_none; |
| 1573 | |
| 1574 | /* Determine where the call point is. */ |
| 1575 | location = (input_sec->output_section->vma |
| 1576 | + input_sec->output_offset + rel->r_offset); |
| 1577 | segment = CALL26_SEGMENT (location); |
| 1578 | |
| 1579 | /* Nios II CALL and JMPI instructions can transfer control to addresses |
| 1580 | within the same 256MB segment as the PC. */ |
| 1581 | if (segment == CALL26_SEGMENT (destination)) |
| 1582 | return nios2_stub_none; |
| 1583 | |
| 1584 | /* Find the start and end addresses of the stub group. Also account for |
| 1585 | any already-created stub sections for this group. Note that for stubs |
| 1586 | in the end section, only the first instruction of the last stub |
| 1587 | (12 bytes long) needs to be within range. */ |
| 1588 | s0 = htab->stub_group[input_sec->id].first_sec; |
| 1589 | s = htab->stub_group[s0->id].first_stub_sec; |
| 1590 | if (s != NULL && s->size > 0) |
| 1591 | start = s->output_section->vma + s->output_offset; |
| 1592 | else |
| 1593 | start = s0->output_section->vma + s0->output_offset; |
| 1594 | |
| 1595 | s1 = htab->stub_group[input_sec->id].last_sec; |
| 1596 | s = htab->stub_group[s1->id].last_stub_sec; |
| 1597 | if (s != NULL && s->size > 0) |
| 1598 | end = s->output_section->vma + s->output_offset + s->size - 8; |
| 1599 | else |
| 1600 | end = s1->output_section->vma + s1->output_offset + s1->size; |
| 1601 | |
| 1602 | BFD_ASSERT (start < end); |
| 1603 | BFD_ASSERT (start <= location); |
| 1604 | BFD_ASSERT (location < end); |
| 1605 | |
| 1606 | /* Put stubs at the end of the group unless that is not a valid |
| 1607 | location and the beginning of the group is. It might be that |
| 1608 | neither the beginning nor end works if we have an input section |
| 1609 | so large that it spans multiple segment boundaries. In that |
| 1610 | case, punt; the end result will be a relocation overflow error no |
| 1611 | matter what we do here. |
| 1612 | |
| 1613 | Note that adding stubs pushes up the addresses of all subsequent |
| 1614 | sections, so that stubs allocated on one pass through the |
| 1615 | relaxation loop may not be valid on the next pass. (E.g., we may |
| 1616 | allocate a stub at the beginning of the section on one pass and |
| 1617 | find that the call site has been bumped into the next memory |
| 1618 | segment on the next pass.) The important thing to note is that |
| 1619 | we never try to reclaim the space allocated to such unused stubs, |
| 1620 | so code size and section addresses can only increase with each |
| 1621 | iteration. Accounting for the start and end addresses of the |
| 1622 | already-created stub sections ensures that when the algorithm |
| 1623 | converges, it converges accurately, with the entire appropriate |
| 1624 | stub section accessible from the call site and not just the |
| 1625 | address at the start or end of the stub group proper. */ |
| 1626 | |
| 1627 | if (segment == CALL26_SEGMENT (end)) |
| 1628 | return nios2_stub_call26_after; |
| 1629 | else if (segment == CALL26_SEGMENT (start)) |
| 1630 | return nios2_stub_call26_before; |
| 1631 | else |
| 1632 | /* Perhaps this should be a dedicated error code. */ |
| 1633 | return nios2_stub_none; |
| 1634 | } |
| 1635 | |
| 1636 | static bfd_boolean |
| 1637 | nios2_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED) |
| 1638 | { |
| 1639 | struct elf32_nios2_stub_hash_entry *hsh |
| 1640 | = (struct elf32_nios2_stub_hash_entry *) gen_entry; |
| 1641 | asection *stub_sec = hsh->stub_sec; |
| 1642 | bfd_vma sym_value; |
| 1643 | |
| 1644 | /* Make a note of the offset within the stubs for this entry. */ |
| 1645 | hsh->stub_offset = stub_sec->size; |
| 1646 | |
| 1647 | switch (hsh->stub_type) |
| 1648 | { |
| 1649 | case nios2_stub_call26_before: |
| 1650 | case nios2_stub_call26_after: |
| 1651 | /* A call26 stub looks like: |
| 1652 | orhi at, %hiadj(dest) |
| 1653 | addi at, at, %lo(dest) |
| 1654 | jmp at |
| 1655 | Note that call/jmpi instructions can't be used in PIC code |
| 1656 | so there is no reason for the stub to be PIC, either. */ |
| 1657 | sym_value = (hsh->target_value |
| 1658 | + hsh->target_section->output_offset |
| 1659 | + hsh->target_section->output_section->vma |
| 1660 | + hsh->addend); |
| 1661 | |
| 1662 | nios2_elf32_install_data (stub_sec, nios2_call26_stub_entry, |
| 1663 | hsh->stub_offset, 3); |
| 1664 | nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset, |
| 1665 | hiadj (sym_value)); |
| 1666 | nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset + 4, |
| 1667 | (sym_value & 0xffff)); |
| 1668 | stub_sec->size += 12; |
| 1669 | break; |
| 1670 | default: |
| 1671 | BFD_FAIL (); |
| 1672 | return FALSE; |
| 1673 | } |
| 1674 | |
| 1675 | return TRUE; |
| 1676 | } |
| 1677 | |
| 1678 | /* As above, but don't actually build the stub. Just bump offset so |
| 1679 | we know stub section sizes. */ |
| 1680 | static bfd_boolean |
| 1681 | nios2_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED) |
| 1682 | { |
| 1683 | struct elf32_nios2_stub_hash_entry *hsh |
| 1684 | = (struct elf32_nios2_stub_hash_entry *) gen_entry; |
| 1685 | |
| 1686 | switch (hsh->stub_type) |
| 1687 | { |
| 1688 | case nios2_stub_call26_before: |
| 1689 | case nios2_stub_call26_after: |
| 1690 | hsh->stub_sec->size += 12; |
| 1691 | break; |
| 1692 | default: |
| 1693 | BFD_FAIL (); |
| 1694 | return FALSE; |
| 1695 | } |
| 1696 | return TRUE; |
| 1697 | } |
| 1698 | |
| 1699 | /* Read in all local syms for all input bfds. |
| 1700 | Returns -1 on error, 0 otherwise. */ |
| 1701 | |
| 1702 | static int |
| 1703 | get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd, |
| 1704 | struct bfd_link_info *info) |
| 1705 | { |
| 1706 | unsigned int bfd_indx; |
| 1707 | Elf_Internal_Sym *local_syms, **all_local_syms; |
| 1708 | struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info); |
| 1709 | |
| 1710 | /* We want to read in symbol extension records only once. To do this |
| 1711 | we need to read in the local symbols in parallel and save them for |
| 1712 | later use; so hold pointers to the local symbols in an array. */ |
| 1713 | bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count; |
| 1714 | all_local_syms = bfd_zmalloc (amt); |
| 1715 | htab->all_local_syms = all_local_syms; |
| 1716 | if (all_local_syms == NULL) |
| 1717 | return -1; |
| 1718 | |
| 1719 | /* Walk over all the input BFDs, swapping in local symbols. */ |
| 1720 | for (bfd_indx = 0; |
| 1721 | input_bfd != NULL; |
| 1722 | input_bfd = input_bfd->link.next, bfd_indx++) |
| 1723 | { |
| 1724 | Elf_Internal_Shdr *symtab_hdr; |
| 1725 | |
| 1726 | /* We'll need the symbol table in a second. */ |
| 1727 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1728 | if (symtab_hdr->sh_info == 0) |
| 1729 | continue; |
| 1730 | |
| 1731 | /* We need an array of the local symbols attached to the input bfd. */ |
| 1732 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1733 | if (local_syms == NULL) |
| 1734 | { |
| 1735 | local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| 1736 | symtab_hdr->sh_info, 0, |
| 1737 | NULL, NULL, NULL); |
| 1738 | /* Cache them for elf_link_input_bfd. */ |
| 1739 | symtab_hdr->contents = (unsigned char *) local_syms; |
| 1740 | } |
| 1741 | if (local_syms == NULL) |
| 1742 | return -1; |
| 1743 | |
| 1744 | all_local_syms[bfd_indx] = local_syms; |
| 1745 | } |
| 1746 | |
| 1747 | return 0; |
| 1748 | } |
| 1749 | |
| 1750 | /* Determine and set the size of the stub section for a final link. */ |
| 1751 | bfd_boolean |
| 1752 | nios2_elf32_size_stubs (bfd *output_bfd, bfd *stub_bfd, |
| 1753 | struct bfd_link_info *info, |
| 1754 | asection *(*add_stub_section) (const char *, |
| 1755 | asection *, bfd_boolean), |
| 1756 | void (*layout_sections_again) (void)) |
| 1757 | { |
| 1758 | bfd_boolean stub_changed = FALSE; |
| 1759 | struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info); |
| 1760 | |
| 1761 | /* Stash our params away. */ |
| 1762 | htab->stub_bfd = stub_bfd; |
| 1763 | htab->add_stub_section = add_stub_section; |
| 1764 | htab->layout_sections_again = layout_sections_again; |
| 1765 | |
| 1766 | /* FIXME: We only compute the section groups once. This could cause |
| 1767 | problems if adding a large stub section causes following sections, |
| 1768 | or parts of them, to move into another segment. However, this seems |
| 1769 | to be consistent with the way other back ends handle this.... */ |
| 1770 | group_sections (htab); |
| 1771 | |
| 1772 | if (get_local_syms (output_bfd, info->input_bfds, info)) |
| 1773 | { |
| 1774 | if (htab->all_local_syms) |
| 1775 | goto error_ret_free_local; |
| 1776 | return FALSE; |
| 1777 | } |
| 1778 | |
| 1779 | while (1) |
| 1780 | { |
| 1781 | bfd *input_bfd; |
| 1782 | unsigned int bfd_indx; |
| 1783 | asection *stub_sec; |
| 1784 | |
| 1785 | for (input_bfd = info->input_bfds, bfd_indx = 0; |
| 1786 | input_bfd != NULL; |
| 1787 | input_bfd = input_bfd->link.next, bfd_indx++) |
| 1788 | { |
| 1789 | Elf_Internal_Shdr *symtab_hdr; |
| 1790 | asection *section; |
| 1791 | Elf_Internal_Sym *local_syms; |
| 1792 | |
| 1793 | /* We'll need the symbol table in a second. */ |
| 1794 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1795 | if (symtab_hdr->sh_info == 0) |
| 1796 | continue; |
| 1797 | |
| 1798 | local_syms = htab->all_local_syms[bfd_indx]; |
| 1799 | |
| 1800 | /* Walk over each section attached to the input bfd. */ |
| 1801 | for (section = input_bfd->sections; |
| 1802 | section != NULL; |
| 1803 | section = section->next) |
| 1804 | { |
| 1805 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
| 1806 | |
| 1807 | /* If there aren't any relocs, then there's nothing more |
| 1808 | to do. */ |
| 1809 | if ((section->flags & SEC_RELOC) == 0 |
| 1810 | || section->reloc_count == 0) |
| 1811 | continue; |
| 1812 | |
| 1813 | /* If this section is a link-once section that will be |
| 1814 | discarded, then don't create any stubs. */ |
| 1815 | if (section->output_section == NULL |
| 1816 | || section->output_section->owner != output_bfd) |
| 1817 | continue; |
| 1818 | |
| 1819 | /* Get the relocs. */ |
| 1820 | internal_relocs |
| 1821 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, |
| 1822 | info->keep_memory); |
| 1823 | if (internal_relocs == NULL) |
| 1824 | goto error_ret_free_local; |
| 1825 | |
| 1826 | /* Now examine each relocation. */ |
| 1827 | irela = internal_relocs; |
| 1828 | irelaend = irela + section->reloc_count; |
| 1829 | for (; irela < irelaend; irela++) |
| 1830 | { |
| 1831 | unsigned int r_type, r_indx; |
| 1832 | enum elf32_nios2_stub_type stub_type; |
| 1833 | struct elf32_nios2_stub_hash_entry *hsh; |
| 1834 | asection *sym_sec; |
| 1835 | bfd_vma sym_value; |
| 1836 | bfd_vma destination; |
| 1837 | struct elf32_nios2_link_hash_entry *hh; |
| 1838 | char *stub_name; |
| 1839 | const asection *id_sec; |
| 1840 | |
| 1841 | r_type = ELF32_R_TYPE (irela->r_info); |
| 1842 | r_indx = ELF32_R_SYM (irela->r_info); |
| 1843 | |
| 1844 | if (r_type >= (unsigned int) R_NIOS2_ILLEGAL) |
| 1845 | { |
| 1846 | bfd_set_error (bfd_error_bad_value); |
| 1847 | error_ret_free_internal: |
| 1848 | if (elf_section_data (section)->relocs == NULL) |
| 1849 | free (internal_relocs); |
| 1850 | goto error_ret_free_local; |
| 1851 | } |
| 1852 | |
| 1853 | /* Only look for stubs on CALL and JMPI instructions. */ |
| 1854 | if (r_type != (unsigned int) R_NIOS2_CALL26) |
| 1855 | continue; |
| 1856 | |
| 1857 | /* Now determine the call target, its name, value, |
| 1858 | section. */ |
| 1859 | sym_sec = NULL; |
| 1860 | sym_value = 0; |
| 1861 | destination = 0; |
| 1862 | hh = NULL; |
| 1863 | if (r_indx < symtab_hdr->sh_info) |
| 1864 | { |
| 1865 | /* It's a local symbol. */ |
| 1866 | Elf_Internal_Sym *sym; |
| 1867 | Elf_Internal_Shdr *hdr; |
| 1868 | unsigned int shndx; |
| 1869 | |
| 1870 | sym = local_syms + r_indx; |
| 1871 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 1872 | sym_value = sym->st_value; |
| 1873 | shndx = sym->st_shndx; |
| 1874 | if (shndx < elf_numsections (input_bfd)) |
| 1875 | { |
| 1876 | hdr = elf_elfsections (input_bfd)[shndx]; |
| 1877 | sym_sec = hdr->bfd_section; |
| 1878 | destination = (sym_value + irela->r_addend |
| 1879 | + sym_sec->output_offset |
| 1880 | + sym_sec->output_section->vma); |
| 1881 | } |
| 1882 | } |
| 1883 | else |
| 1884 | { |
| 1885 | /* It's an external symbol. */ |
| 1886 | int e_indx; |
| 1887 | |
| 1888 | e_indx = r_indx - symtab_hdr->sh_info; |
| 1889 | hh = ((struct elf32_nios2_link_hash_entry *) |
| 1890 | elf_sym_hashes (input_bfd)[e_indx]); |
| 1891 | |
| 1892 | while (hh->root.root.type == bfd_link_hash_indirect |
| 1893 | || hh->root.root.type == bfd_link_hash_warning) |
| 1894 | hh = ((struct elf32_nios2_link_hash_entry *) |
| 1895 | hh->root.root.u.i.link); |
| 1896 | |
| 1897 | if (hh->root.root.type == bfd_link_hash_defined |
| 1898 | || hh->root.root.type == bfd_link_hash_defweak) |
| 1899 | { |
| 1900 | sym_sec = hh->root.root.u.def.section; |
| 1901 | sym_value = hh->root.root.u.def.value; |
| 1902 | |
| 1903 | if (sym_sec->output_section != NULL) |
| 1904 | destination = (sym_value + irela->r_addend |
| 1905 | + sym_sec->output_offset |
| 1906 | + sym_sec->output_section->vma); |
| 1907 | else |
| 1908 | continue; |
| 1909 | } |
| 1910 | else if (hh->root.root.type == bfd_link_hash_undefweak) |
| 1911 | { |
| 1912 | if (! info->shared) |
| 1913 | continue; |
| 1914 | } |
| 1915 | else if (hh->root.root.type == bfd_link_hash_undefined) |
| 1916 | { |
| 1917 | if (! (info->unresolved_syms_in_objects == RM_IGNORE |
| 1918 | && (ELF_ST_VISIBILITY (hh->root.other) |
| 1919 | == STV_DEFAULT))) |
| 1920 | continue; |
| 1921 | } |
| 1922 | else |
| 1923 | { |
| 1924 | bfd_set_error (bfd_error_bad_value); |
| 1925 | goto error_ret_free_internal; |
| 1926 | } |
| 1927 | } |
| 1928 | |
| 1929 | /* Determine what (if any) linker stub is needed. */ |
| 1930 | stub_type = nios2_type_of_stub (section, irela, hh, htab, |
| 1931 | destination, info); |
| 1932 | if (stub_type == nios2_stub_none) |
| 1933 | continue; |
| 1934 | |
| 1935 | /* Support for grouping stub sections. */ |
| 1936 | if (stub_type == nios2_stub_call26_before) |
| 1937 | id_sec = htab->stub_group[section->id].first_sec; |
| 1938 | else |
| 1939 | id_sec = htab->stub_group[section->id].last_sec; |
| 1940 | |
| 1941 | /* Get the name of this stub. */ |
| 1942 | stub_name = nios2_stub_name (id_sec, sym_sec, hh, irela, |
| 1943 | stub_type); |
| 1944 | if (!stub_name) |
| 1945 | goto error_ret_free_internal; |
| 1946 | |
| 1947 | hsh = nios2_stub_hash_lookup (&htab->bstab, |
| 1948 | stub_name, |
| 1949 | FALSE, FALSE); |
| 1950 | if (hsh != NULL) |
| 1951 | { |
| 1952 | /* The proper stub has already been created. */ |
| 1953 | free (stub_name); |
| 1954 | continue; |
| 1955 | } |
| 1956 | |
| 1957 | hsh = nios2_add_stub (stub_name, section, htab, stub_type); |
| 1958 | if (hsh == NULL) |
| 1959 | { |
| 1960 | free (stub_name); |
| 1961 | goto error_ret_free_internal; |
| 1962 | } |
| 1963 | hsh->target_value = sym_value; |
| 1964 | hsh->target_section = sym_sec; |
| 1965 | hsh->stub_type = stub_type; |
| 1966 | hsh->hh = hh; |
| 1967 | hsh->addend = irela->r_addend; |
| 1968 | stub_changed = TRUE; |
| 1969 | } |
| 1970 | |
| 1971 | /* We're done with the internal relocs, free them. */ |
| 1972 | if (elf_section_data (section)->relocs == NULL) |
| 1973 | free (internal_relocs); |
| 1974 | } |
| 1975 | } |
| 1976 | |
| 1977 | if (!stub_changed) |
| 1978 | break; |
| 1979 | |
| 1980 | /* OK, we've added some stubs. Find out the new size of the |
| 1981 | stub sections. */ |
| 1982 | for (stub_sec = htab->stub_bfd->sections; |
| 1983 | stub_sec != NULL; |
| 1984 | stub_sec = stub_sec->next) |
| 1985 | stub_sec->size = 0; |
| 1986 | |
| 1987 | bfd_hash_traverse (&htab->bstab, nios2_size_one_stub, htab); |
| 1988 | |
| 1989 | /* Ask the linker to do its stuff. */ |
| 1990 | (*htab->layout_sections_again) (); |
| 1991 | stub_changed = FALSE; |
| 1992 | } |
| 1993 | |
| 1994 | free (htab->all_local_syms); |
| 1995 | return TRUE; |
| 1996 | |
| 1997 | error_ret_free_local: |
| 1998 | free (htab->all_local_syms); |
| 1999 | return FALSE; |
| 2000 | } |
| 2001 | |
| 2002 | /* Build all the stubs associated with the current output file. The |
| 2003 | stubs are kept in a hash table attached to the main linker hash |
| 2004 | table. This function is called via nios2elf_finish in the linker. */ |
| 2005 | bfd_boolean |
| 2006 | nios2_elf32_build_stubs (struct bfd_link_info *info) |
| 2007 | { |
| 2008 | asection *stub_sec; |
| 2009 | struct bfd_hash_table *table; |
| 2010 | struct elf32_nios2_link_hash_table *htab; |
| 2011 | |
| 2012 | htab = elf32_nios2_hash_table (info); |
| 2013 | |
| 2014 | for (stub_sec = htab->stub_bfd->sections; |
| 2015 | stub_sec != NULL; |
| 2016 | stub_sec = stub_sec->next) |
| 2017 | /* The stub_bfd may contain non-stub sections if it is also the |
| 2018 | dynobj. Any such non-stub sections are created with the |
| 2019 | SEC_LINKER_CREATED flag set, while stub sections do not |
| 2020 | have that flag. Ignore any non-stub sections here. */ |
| 2021 | if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) |
| 2022 | { |
| 2023 | bfd_size_type size; |
| 2024 | |
| 2025 | /* Allocate memory to hold the linker stubs. */ |
| 2026 | size = stub_sec->size; |
| 2027 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); |
| 2028 | if (stub_sec->contents == NULL && size != 0) |
| 2029 | return FALSE; |
| 2030 | stub_sec->size = 0; |
| 2031 | } |
| 2032 | |
| 2033 | /* Build the stubs as directed by the stub hash table. */ |
| 2034 | table = &htab->bstab; |
| 2035 | bfd_hash_traverse (table, nios2_build_one_stub, info); |
| 2036 | |
| 2037 | return TRUE; |
| 2038 | } |
| 2039 | |
| 2040 | |
| 2041 | /* Implement bfd_elf32_bfd_reloc_type_lookup: |
| 2042 | Given a BFD reloc type, return a howto structure. */ |
| 2043 | static reloc_howto_type * |
| 2044 | nios2_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 2045 | bfd_reloc_code_real_type code) |
| 2046 | { |
| 2047 | int i; |
| 2048 | for (i = 0; |
| 2049 | i < (int) (sizeof (nios2_reloc_map) / sizeof (struct elf_reloc_map)); |
| 2050 | ++i) |
| 2051 | if (nios2_reloc_map[i].bfd_val == code) |
| 2052 | return &elf_nios2_howto_table_rel[(int) nios2_reloc_map[i].elf_val]; |
| 2053 | return NULL; |
| 2054 | } |
| 2055 | |
| 2056 | /* Implement bfd_elf32_bfd_reloc_name_lookup: |
| 2057 | Given a reloc name, return a howto structure. */ |
| 2058 | static reloc_howto_type * |
| 2059 | nios2_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 2060 | const char *r_name) |
| 2061 | { |
| 2062 | unsigned int i; |
| 2063 | for (i = 0; |
| 2064 | i < (sizeof (elf_nios2_howto_table_rel) |
| 2065 | / sizeof (elf_nios2_howto_table_rel[0])); |
| 2066 | i++) |
| 2067 | if (elf_nios2_howto_table_rel[i].name |
| 2068 | && strcasecmp (elf_nios2_howto_table_rel[i].name, r_name) == 0) |
| 2069 | return &elf_nios2_howto_table_rel[i]; |
| 2070 | |
| 2071 | return NULL; |
| 2072 | } |
| 2073 | |
| 2074 | /* Implement elf_info_to_howto: |
| 2075 | Given a ELF32 relocation, fill in a arelent structure. */ |
| 2076 | static void |
| 2077 | nios2_elf32_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
| 2078 | Elf_Internal_Rela *dst) |
| 2079 | { |
| 2080 | unsigned int r_type; |
| 2081 | |
| 2082 | r_type = ELF32_R_TYPE (dst->r_info); |
| 2083 | BFD_ASSERT (r_type < R_NIOS2_ILLEGAL); |
| 2084 | cache_ptr->howto = &elf_nios2_howto_table_rel[r_type]; |
| 2085 | } |
| 2086 | |
| 2087 | /* Return the base VMA address which should be subtracted from real addresses |
| 2088 | when resolving @dtpoff relocation. |
| 2089 | This is PT_TLS segment p_vaddr. */ |
| 2090 | static bfd_vma |
| 2091 | dtpoff_base (struct bfd_link_info *info) |
| 2092 | { |
| 2093 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 2094 | if (elf_hash_table (info)->tls_sec == NULL) |
| 2095 | return 0; |
| 2096 | return elf_hash_table (info)->tls_sec->vma; |
| 2097 | } |
| 2098 | |
| 2099 | /* Return the relocation value for @tpoff relocation |
| 2100 | if STT_TLS virtual address is ADDRESS. */ |
| 2101 | static bfd_vma |
| 2102 | tpoff (struct bfd_link_info *info, bfd_vma address) |
| 2103 | { |
| 2104 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 2105 | |
| 2106 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 2107 | if (htab->tls_sec == NULL) |
| 2108 | return 0; |
| 2109 | return address - htab->tls_sec->vma; |
| 2110 | } |
| 2111 | |
| 2112 | /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a |
| 2113 | dangerous relocation. */ |
| 2114 | static bfd_boolean |
| 2115 | nios2_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp, struct bfd_link_info *info) |
| 2116 | { |
| 2117 | |
| 2118 | bfd_boolean gp_found; |
| 2119 | struct bfd_hash_entry *h; |
| 2120 | struct bfd_link_hash_entry *lh; |
| 2121 | |
| 2122 | /* If we've already figured out what GP will be, just return it. */ |
| 2123 | *pgp = _bfd_get_gp_value (output_bfd); |
| 2124 | if (*pgp) |
| 2125 | return TRUE; |
| 2126 | |
| 2127 | h = bfd_hash_lookup (&info->hash->table, "_gp", FALSE, FALSE); |
| 2128 | lh = (struct bfd_link_hash_entry *) h; |
| 2129 | lookup: |
| 2130 | if (lh) |
| 2131 | { |
| 2132 | switch (lh->type) |
| 2133 | { |
| 2134 | case bfd_link_hash_undefined: |
| 2135 | case bfd_link_hash_undefweak: |
| 2136 | case bfd_link_hash_common: |
| 2137 | gp_found = FALSE; |
| 2138 | break; |
| 2139 | case bfd_link_hash_defined: |
| 2140 | case bfd_link_hash_defweak: |
| 2141 | gp_found = TRUE; |
| 2142 | *pgp = lh->u.def.value; |
| 2143 | break; |
| 2144 | case bfd_link_hash_indirect: |
| 2145 | case bfd_link_hash_warning: |
| 2146 | lh = lh->u.i.link; |
| 2147 | /* @@FIXME ignoring warning for now */ |
| 2148 | goto lookup; |
| 2149 | case bfd_link_hash_new: |
| 2150 | default: |
| 2151 | abort (); |
| 2152 | } |
| 2153 | } |
| 2154 | else |
| 2155 | gp_found = FALSE; |
| 2156 | |
| 2157 | if (!gp_found) |
| 2158 | { |
| 2159 | /* Only get the error once. */ |
| 2160 | *pgp = 4; |
| 2161 | _bfd_set_gp_value (output_bfd, *pgp); |
| 2162 | return FALSE; |
| 2163 | } |
| 2164 | |
| 2165 | _bfd_set_gp_value (output_bfd, *pgp); |
| 2166 | |
| 2167 | return TRUE; |
| 2168 | } |
| 2169 | |
| 2170 | /* Retrieve the previously cached _gp pointer, returning bfd_reloc_dangerous |
| 2171 | if it's not available as we don't have a link_info pointer available here |
| 2172 | to look it up in the output symbol table. We don't need to adjust the |
| 2173 | symbol value for an external symbol if we are producing relocatable |
| 2174 | output. */ |
| 2175 | static bfd_reloc_status_type |
| 2176 | nios2_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable, |
| 2177 | char **error_message, bfd_vma *pgp) |
| 2178 | { |
| 2179 | if (bfd_is_und_section (symbol->section) && !relocatable) |
| 2180 | { |
| 2181 | *pgp = 0; |
| 2182 | return bfd_reloc_undefined; |
| 2183 | } |
| 2184 | |
| 2185 | *pgp = _bfd_get_gp_value (output_bfd); |
| 2186 | if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0)) |
| 2187 | { |
| 2188 | if (relocatable) |
| 2189 | { |
| 2190 | /* Make up a value. */ |
| 2191 | *pgp = symbol->section->output_section->vma + 0x4000; |
| 2192 | _bfd_set_gp_value (output_bfd, *pgp); |
| 2193 | } |
| 2194 | else |
| 2195 | { |
| 2196 | *error_message |
| 2197 | = (char *) _("global pointer relative relocation when _gp not defined"); |
| 2198 | return bfd_reloc_dangerous; |
| 2199 | } |
| 2200 | } |
| 2201 | |
| 2202 | return bfd_reloc_ok; |
| 2203 | } |
| 2204 | |
| 2205 | /* Do the relocations that require special handling. */ |
| 2206 | static bfd_reloc_status_type |
| 2207 | nios2_elf32_do_hi16_relocate (bfd *abfd, reloc_howto_type *howto, |
| 2208 | asection *input_section, |
| 2209 | bfd_byte *data, bfd_vma offset, |
| 2210 | bfd_vma symbol_value, bfd_vma addend) |
| 2211 | { |
| 2212 | symbol_value = symbol_value + addend; |
| 2213 | addend = 0; |
| 2214 | symbol_value = (symbol_value >> 16) & 0xffff; |
| 2215 | return _bfd_final_link_relocate (howto, abfd, input_section, |
| 2216 | data, offset, symbol_value, addend); |
| 2217 | } |
| 2218 | |
| 2219 | static bfd_reloc_status_type |
| 2220 | nios2_elf32_do_lo16_relocate (bfd *abfd, reloc_howto_type *howto, |
| 2221 | asection *input_section, |
| 2222 | bfd_byte *data, bfd_vma offset, |
| 2223 | bfd_vma symbol_value, bfd_vma addend) |
| 2224 | { |
| 2225 | symbol_value = symbol_value + addend; |
| 2226 | addend = 0; |
| 2227 | symbol_value = symbol_value & 0xffff; |
| 2228 | return _bfd_final_link_relocate (howto, abfd, input_section, |
| 2229 | data, offset, symbol_value, addend); |
| 2230 | } |
| 2231 | |
| 2232 | static bfd_reloc_status_type |
| 2233 | nios2_elf32_do_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto, |
| 2234 | asection *input_section, |
| 2235 | bfd_byte *data, bfd_vma offset, |
| 2236 | bfd_vma symbol_value, bfd_vma addend) |
| 2237 | { |
| 2238 | symbol_value = symbol_value + addend; |
| 2239 | addend = 0; |
| 2240 | symbol_value = hiadj(symbol_value); |
| 2241 | return _bfd_final_link_relocate (howto, abfd, input_section, data, offset, |
| 2242 | symbol_value, addend); |
| 2243 | } |
| 2244 | |
| 2245 | static bfd_reloc_status_type |
| 2246 | nios2_elf32_do_pcrel_lo16_relocate (bfd *abfd, reloc_howto_type *howto, |
| 2247 | asection *input_section, |
| 2248 | bfd_byte *data, bfd_vma offset, |
| 2249 | bfd_vma symbol_value, bfd_vma addend) |
| 2250 | { |
| 2251 | symbol_value = symbol_value + addend; |
| 2252 | addend = 0; |
| 2253 | symbol_value = symbol_value & 0xffff; |
| 2254 | return _bfd_final_link_relocate (howto, abfd, input_section, |
| 2255 | data, offset, symbol_value, addend); |
| 2256 | } |
| 2257 | |
| 2258 | static bfd_reloc_status_type |
| 2259 | nios2_elf32_do_pcrel_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto, |
| 2260 | asection *input_section, |
| 2261 | bfd_byte *data, bfd_vma offset, |
| 2262 | bfd_vma symbol_value, bfd_vma addend) |
| 2263 | { |
| 2264 | symbol_value = symbol_value + addend; |
| 2265 | symbol_value -= (input_section->output_section->vma |
| 2266 | + input_section->output_offset); |
| 2267 | symbol_value -= offset; |
| 2268 | addend = 0; |
| 2269 | symbol_value = hiadj(symbol_value); |
| 2270 | return _bfd_final_link_relocate (howto, abfd, input_section, data, offset, |
| 2271 | symbol_value, addend); |
| 2272 | } |
| 2273 | |
| 2274 | static bfd_reloc_status_type |
| 2275 | nios2_elf32_do_pcrel16_relocate (bfd *abfd, reloc_howto_type *howto, |
| 2276 | asection *input_section, |
| 2277 | bfd_byte *data, bfd_vma offset, |
| 2278 | bfd_vma symbol_value, bfd_vma addend) |
| 2279 | { |
| 2280 | /* NIOS2 pc relative relocations are relative to the next 32-bit instruction |
| 2281 | so we need to subtract 4 before doing a final_link_relocate. */ |
| 2282 | symbol_value = symbol_value + addend - 4; |
| 2283 | addend = 0; |
| 2284 | return _bfd_final_link_relocate (howto, abfd, input_section, |
| 2285 | data, offset, symbol_value, addend); |
| 2286 | } |
| 2287 | |
| 2288 | static bfd_reloc_status_type |
| 2289 | nios2_elf32_do_call26_relocate (bfd *abfd, reloc_howto_type *howto, |
| 2290 | asection *input_section, |
| 2291 | bfd_byte *data, bfd_vma offset, |
| 2292 | bfd_vma symbol_value, bfd_vma addend) |
| 2293 | { |
| 2294 | /* Check that the relocation is in the same page as the current address. */ |
| 2295 | if (CALL26_SEGMENT (symbol_value + addend) |
| 2296 | != CALL26_SEGMENT (input_section->output_section->vma |
| 2297 | + input_section->output_offset |
| 2298 | + offset)) |
| 2299 | return bfd_reloc_overflow; |
| 2300 | |
| 2301 | return _bfd_final_link_relocate (howto, abfd, input_section, |
| 2302 | data, offset, symbol_value, addend); |
| 2303 | } |
| 2304 | |
| 2305 | static bfd_reloc_status_type |
| 2306 | nios2_elf32_do_gprel_relocate (bfd *abfd, reloc_howto_type *howto, |
| 2307 | asection *input_section, |
| 2308 | bfd_byte *data, bfd_vma offset, |
| 2309 | bfd_vma symbol_value, bfd_vma addend) |
| 2310 | { |
| 2311 | /* Because we need the output_bfd, the special handling is done |
| 2312 | in nios2_elf32_relocate_section or in nios2_elf32_gprel_relocate. */ |
| 2313 | return _bfd_final_link_relocate (howto, abfd, input_section, |
| 2314 | data, offset, symbol_value, addend); |
| 2315 | } |
| 2316 | |
| 2317 | static bfd_reloc_status_type |
| 2318 | nios2_elf32_do_ujmp_relocate (bfd *abfd, reloc_howto_type *howto, |
| 2319 | asection *input_section, |
| 2320 | bfd_byte *data, bfd_vma offset, |
| 2321 | bfd_vma symbol_value, bfd_vma addend) |
| 2322 | { |
| 2323 | bfd_vma symbol_lo16, symbol_hi16; |
| 2324 | bfd_reloc_status_type r; |
| 2325 | symbol_value = symbol_value + addend; |
| 2326 | addend = 0; |
| 2327 | symbol_hi16 = (symbol_value >> 16) & 0xffff; |
| 2328 | symbol_lo16 = symbol_value & 0xffff; |
| 2329 | |
| 2330 | r = _bfd_final_link_relocate (howto, abfd, input_section, |
| 2331 | data, offset, symbol_hi16, addend); |
| 2332 | |
| 2333 | if (r == bfd_reloc_ok) |
| 2334 | return _bfd_final_link_relocate (howto, abfd, input_section, |
| 2335 | data, offset + 4, symbol_lo16, addend); |
| 2336 | |
| 2337 | return r; |
| 2338 | } |
| 2339 | |
| 2340 | static bfd_reloc_status_type |
| 2341 | nios2_elf32_do_cjmp_relocate (bfd *abfd, reloc_howto_type *howto, |
| 2342 | asection *input_section, |
| 2343 | bfd_byte *data, bfd_vma offset, |
| 2344 | bfd_vma symbol_value, bfd_vma addend) |
| 2345 | { |
| 2346 | bfd_vma symbol_lo16, symbol_hi16; |
| 2347 | bfd_reloc_status_type r; |
| 2348 | symbol_value = symbol_value + addend; |
| 2349 | addend = 0; |
| 2350 | symbol_hi16 = (symbol_value >> 16) & 0xffff; |
| 2351 | symbol_lo16 = symbol_value & 0xffff; |
| 2352 | |
| 2353 | r = _bfd_final_link_relocate (howto, abfd, input_section, |
| 2354 | data, offset, symbol_hi16, addend); |
| 2355 | |
| 2356 | if (r == bfd_reloc_ok) |
| 2357 | return _bfd_final_link_relocate (howto, abfd, input_section, |
| 2358 | data, offset + 4, symbol_lo16, addend); |
| 2359 | |
| 2360 | return r; |
| 2361 | } |
| 2362 | |
| 2363 | static bfd_reloc_status_type |
| 2364 | nios2_elf32_do_callr_relocate (bfd *abfd, reloc_howto_type *howto, |
| 2365 | asection *input_section, |
| 2366 | bfd_byte *data, bfd_vma offset, |
| 2367 | bfd_vma symbol_value, bfd_vma addend) |
| 2368 | { |
| 2369 | bfd_vma symbol_lo16, symbol_hi16; |
| 2370 | bfd_reloc_status_type r; |
| 2371 | symbol_value = symbol_value + addend; |
| 2372 | addend = 0; |
| 2373 | symbol_hi16 = (symbol_value >> 16) & 0xffff; |
| 2374 | symbol_lo16 = symbol_value & 0xffff; |
| 2375 | |
| 2376 | r = _bfd_final_link_relocate (howto, abfd, input_section, |
| 2377 | data, offset, symbol_hi16, addend); |
| 2378 | |
| 2379 | if (r == bfd_reloc_ok) |
| 2380 | return _bfd_final_link_relocate (howto, abfd, input_section, |
| 2381 | data, offset + 4, symbol_lo16, addend); |
| 2382 | |
| 2383 | return r; |
| 2384 | } |
| 2385 | |
| 2386 | /* HOWTO handlers for relocations that require special handling. */ |
| 2387 | |
| 2388 | /* This is for relocations used only when relaxing to ensure |
| 2389 | changes in size of section don't screw up .align. */ |
| 2390 | static bfd_reloc_status_type |
| 2391 | nios2_elf32_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry, |
| 2392 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 2393 | void *data ATTRIBUTE_UNUSED, asection *input_section, |
| 2394 | bfd *output_bfd, |
| 2395 | char **error_message ATTRIBUTE_UNUSED) |
| 2396 | { |
| 2397 | if (output_bfd != NULL) |
| 2398 | reloc_entry->address += input_section->output_offset; |
| 2399 | return bfd_reloc_ok; |
| 2400 | } |
| 2401 | |
| 2402 | static bfd_reloc_status_type |
| 2403 | nios2_elf32_hi16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 2404 | void *data, asection *input_section, |
| 2405 | bfd *output_bfd, |
| 2406 | char **error_message ATTRIBUTE_UNUSED) |
| 2407 | { |
| 2408 | /* This part is from bfd_elf_generic_reloc. */ |
| 2409 | if (output_bfd != NULL |
| 2410 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 2411 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| 2412 | { |
| 2413 | reloc_entry->address += input_section->output_offset; |
| 2414 | return bfd_reloc_ok; |
| 2415 | } |
| 2416 | |
| 2417 | if (output_bfd != NULL) |
| 2418 | /* FIXME: See bfd_perform_relocation. Is this right? */ |
| 2419 | return bfd_reloc_continue; |
| 2420 | |
| 2421 | return nios2_elf32_do_hi16_relocate (abfd, reloc_entry->howto, |
| 2422 | input_section, |
| 2423 | data, reloc_entry->address, |
| 2424 | (symbol->value |
| 2425 | + symbol->section->output_section->vma |
| 2426 | + symbol->section->output_offset), |
| 2427 | reloc_entry->addend); |
| 2428 | } |
| 2429 | |
| 2430 | static bfd_reloc_status_type |
| 2431 | nios2_elf32_lo16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 2432 | void *data, asection *input_section, |
| 2433 | bfd *output_bfd, |
| 2434 | char **error_message ATTRIBUTE_UNUSED) |
| 2435 | { |
| 2436 | /* This part is from bfd_elf_generic_reloc. */ |
| 2437 | if (output_bfd != NULL |
| 2438 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 2439 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| 2440 | { |
| 2441 | reloc_entry->address += input_section->output_offset; |
| 2442 | return bfd_reloc_ok; |
| 2443 | } |
| 2444 | |
| 2445 | if (output_bfd != NULL) |
| 2446 | /* FIXME: See bfd_perform_relocation. Is this right? */ |
| 2447 | return bfd_reloc_continue; |
| 2448 | |
| 2449 | return nios2_elf32_do_lo16_relocate (abfd, reloc_entry->howto, |
| 2450 | input_section, |
| 2451 | data, reloc_entry->address, |
| 2452 | (symbol->value |
| 2453 | + symbol->section->output_section->vma |
| 2454 | + symbol->section->output_offset), |
| 2455 | reloc_entry->addend); |
| 2456 | } |
| 2457 | |
| 2458 | static bfd_reloc_status_type |
| 2459 | nios2_elf32_hiadj16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 2460 | void *data, asection *input_section, |
| 2461 | bfd *output_bfd, |
| 2462 | char **error_message ATTRIBUTE_UNUSED) |
| 2463 | { |
| 2464 | /* This part is from bfd_elf_generic_reloc. */ |
| 2465 | if (output_bfd != NULL |
| 2466 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 2467 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| 2468 | { |
| 2469 | reloc_entry->address += input_section->output_offset; |
| 2470 | return bfd_reloc_ok; |
| 2471 | } |
| 2472 | |
| 2473 | if (output_bfd != NULL) |
| 2474 | /* FIXME: See bfd_perform_relocation. Is this right? */ |
| 2475 | return bfd_reloc_continue; |
| 2476 | |
| 2477 | return nios2_elf32_do_hiadj16_relocate (abfd, reloc_entry->howto, |
| 2478 | input_section, |
| 2479 | data, reloc_entry->address, |
| 2480 | (symbol->value |
| 2481 | + symbol->section->output_section->vma |
| 2482 | + symbol->section->output_offset), |
| 2483 | reloc_entry->addend); |
| 2484 | } |
| 2485 | |
| 2486 | static bfd_reloc_status_type |
| 2487 | nios2_elf32_pcrel_lo16_relocate (bfd *abfd, arelent *reloc_entry, |
| 2488 | asymbol *symbol, void *data, |
| 2489 | asection *input_section, bfd *output_bfd, |
| 2490 | char **error_message ATTRIBUTE_UNUSED) |
| 2491 | { |
| 2492 | /* This part is from bfd_elf_generic_reloc. */ |
| 2493 | if (output_bfd != NULL |
| 2494 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 2495 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| 2496 | { |
| 2497 | reloc_entry->address += input_section->output_offset; |
| 2498 | return bfd_reloc_ok; |
| 2499 | } |
| 2500 | |
| 2501 | if (output_bfd != NULL) |
| 2502 | /* FIXME: See bfd_perform_relocation. Is this right? */ |
| 2503 | return bfd_reloc_continue; |
| 2504 | |
| 2505 | return nios2_elf32_do_pcrel_lo16_relocate ( |
| 2506 | abfd, reloc_entry->howto, input_section, data, reloc_entry->address, |
| 2507 | (symbol->value + symbol->section->output_section->vma |
| 2508 | + symbol->section->output_offset), |
| 2509 | reloc_entry->addend); |
| 2510 | } |
| 2511 | |
| 2512 | static bfd_reloc_status_type |
| 2513 | nios2_elf32_pcrel_hiadj16_relocate (bfd *abfd, arelent *reloc_entry, |
| 2514 | asymbol *symbol, void *data, |
| 2515 | asection *input_section, bfd *output_bfd, |
| 2516 | char **error_message ATTRIBUTE_UNUSED) |
| 2517 | { |
| 2518 | /* This part is from bfd_elf_generic_reloc. */ |
| 2519 | if (output_bfd != NULL |
| 2520 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 2521 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| 2522 | { |
| 2523 | reloc_entry->address += input_section->output_offset; |
| 2524 | return bfd_reloc_ok; |
| 2525 | } |
| 2526 | |
| 2527 | if (output_bfd != NULL) |
| 2528 | /* FIXME: See bfd_perform_relocation. Is this right? */ |
| 2529 | return bfd_reloc_continue; |
| 2530 | |
| 2531 | return nios2_elf32_do_pcrel_hiadj16_relocate ( |
| 2532 | abfd, reloc_entry->howto, input_section, data, reloc_entry->address, |
| 2533 | (symbol->value + symbol->section->output_section->vma |
| 2534 | + symbol->section->output_offset), |
| 2535 | reloc_entry->addend); |
| 2536 | } |
| 2537 | |
| 2538 | static bfd_reloc_status_type |
| 2539 | nios2_elf32_pcrel16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 2540 | void *data, asection *input_section, |
| 2541 | bfd *output_bfd, |
| 2542 | char **error_message ATTRIBUTE_UNUSED) |
| 2543 | { |
| 2544 | /* This part is from bfd_elf_generic_reloc. */ |
| 2545 | if (output_bfd != NULL |
| 2546 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 2547 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| 2548 | { |
| 2549 | reloc_entry->address += input_section->output_offset; |
| 2550 | return bfd_reloc_ok; |
| 2551 | } |
| 2552 | |
| 2553 | if (output_bfd != NULL) |
| 2554 | /* FIXME: See bfd_perform_relocation. Is this right? */ |
| 2555 | return bfd_reloc_continue; |
| 2556 | |
| 2557 | return nios2_elf32_do_pcrel16_relocate (abfd, reloc_entry->howto, |
| 2558 | input_section, |
| 2559 | data, reloc_entry->address, |
| 2560 | (symbol->value |
| 2561 | + symbol->section->output_section->vma |
| 2562 | + symbol->section->output_offset), |
| 2563 | reloc_entry->addend); |
| 2564 | } |
| 2565 | |
| 2566 | static bfd_reloc_status_type |
| 2567 | nios2_elf32_call26_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 2568 | void *data, asection *input_section, |
| 2569 | bfd *output_bfd, |
| 2570 | char **error_message ATTRIBUTE_UNUSED) |
| 2571 | { |
| 2572 | /* This part is from bfd_elf_generic_reloc. */ |
| 2573 | if (output_bfd != NULL |
| 2574 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 2575 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| 2576 | { |
| 2577 | reloc_entry->address += input_section->output_offset; |
| 2578 | return bfd_reloc_ok; |
| 2579 | } |
| 2580 | |
| 2581 | if (output_bfd != NULL) |
| 2582 | /* FIXME: See bfd_perform_relocation. Is this right? */ |
| 2583 | return bfd_reloc_continue; |
| 2584 | |
| 2585 | return nios2_elf32_do_call26_relocate (abfd, reloc_entry->howto, |
| 2586 | input_section, |
| 2587 | data, reloc_entry->address, |
| 2588 | (symbol->value |
| 2589 | + symbol->section->output_section->vma |
| 2590 | + symbol->section->output_offset), |
| 2591 | reloc_entry->addend); |
| 2592 | } |
| 2593 | |
| 2594 | static bfd_reloc_status_type |
| 2595 | nios2_elf32_gprel_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 2596 | void *data, asection *input_section, |
| 2597 | bfd *output_bfd, char **msg) |
| 2598 | { |
| 2599 | bfd_vma relocation; |
| 2600 | bfd_vma gp; |
| 2601 | bfd_reloc_status_type r; |
| 2602 | |
| 2603 | |
| 2604 | /* This part is from bfd_elf_generic_reloc. */ |
| 2605 | if (output_bfd != NULL |
| 2606 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 2607 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| 2608 | { |
| 2609 | reloc_entry->address += input_section->output_offset; |
| 2610 | return bfd_reloc_ok; |
| 2611 | } |
| 2612 | |
| 2613 | if (output_bfd != NULL) |
| 2614 | /* FIXME: See bfd_perform_relocation. Is this right? */ |
| 2615 | return bfd_reloc_continue; |
| 2616 | |
| 2617 | relocation = (symbol->value |
| 2618 | + symbol->section->output_section->vma |
| 2619 | + symbol->section->output_offset); |
| 2620 | |
| 2621 | /* This assumes we've already cached the _gp symbol. */ |
| 2622 | r = nios2_elf_final_gp (abfd, symbol, FALSE, msg, &gp); |
| 2623 | if (r == bfd_reloc_ok) |
| 2624 | { |
| 2625 | relocation = relocation + reloc_entry->addend - gp; |
| 2626 | reloc_entry->addend = 0; |
| 2627 | if ((signed) relocation < -32768 || (signed) relocation > 32767) |
| 2628 | { |
| 2629 | *msg = _("global pointer relative address out of range"); |
| 2630 | r = bfd_reloc_outofrange; |
| 2631 | } |
| 2632 | else |
| 2633 | r = nios2_elf32_do_gprel_relocate (abfd, reloc_entry->howto, |
| 2634 | input_section, |
| 2635 | data, reloc_entry->address, |
| 2636 | relocation, reloc_entry->addend); |
| 2637 | } |
| 2638 | |
| 2639 | return r; |
| 2640 | } |
| 2641 | |
| 2642 | static bfd_reloc_status_type |
| 2643 | nios2_elf32_ujmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 2644 | void *data, asection *input_section, |
| 2645 | bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) |
| 2646 | { |
| 2647 | /* This part is from bfd_elf_generic_reloc. */ |
| 2648 | if (output_bfd != NULL |
| 2649 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 2650 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| 2651 | { |
| 2652 | reloc_entry->address += input_section->output_offset; |
| 2653 | return bfd_reloc_ok; |
| 2654 | } |
| 2655 | |
| 2656 | if (output_bfd != NULL) |
| 2657 | /* FIXME: See bfd_perform_relocation. Is this right? */ |
| 2658 | return bfd_reloc_continue; |
| 2659 | |
| 2660 | return nios2_elf32_do_ujmp_relocate (abfd, reloc_entry->howto, |
| 2661 | input_section, |
| 2662 | data, reloc_entry->address, |
| 2663 | (symbol->value |
| 2664 | + symbol->section->output_section->vma |
| 2665 | + symbol->section->output_offset), |
| 2666 | reloc_entry->addend); |
| 2667 | } |
| 2668 | |
| 2669 | static bfd_reloc_status_type |
| 2670 | nios2_elf32_cjmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 2671 | void *data, asection *input_section, |
| 2672 | bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) |
| 2673 | { |
| 2674 | /* This part is from bfd_elf_generic_reloc. */ |
| 2675 | if (output_bfd != NULL |
| 2676 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 2677 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| 2678 | { |
| 2679 | reloc_entry->address += input_section->output_offset; |
| 2680 | return bfd_reloc_ok; |
| 2681 | } |
| 2682 | |
| 2683 | if (output_bfd != NULL) |
| 2684 | /* FIXME: See bfd_perform_relocation. Is this right? */ |
| 2685 | return bfd_reloc_continue; |
| 2686 | |
| 2687 | return nios2_elf32_do_cjmp_relocate (abfd, reloc_entry->howto, |
| 2688 | input_section, |
| 2689 | data, reloc_entry->address, |
| 2690 | (symbol->value |
| 2691 | + symbol->section->output_section->vma |
| 2692 | + symbol->section->output_offset), |
| 2693 | reloc_entry->addend); |
| 2694 | } |
| 2695 | |
| 2696 | static bfd_reloc_status_type |
| 2697 | nios2_elf32_callr_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 2698 | void *data, asection *input_section, |
| 2699 | bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) |
| 2700 | { |
| 2701 | /* This part is from bfd_elf_generic_reloc. */ |
| 2702 | if (output_bfd != NULL |
| 2703 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 2704 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| 2705 | { |
| 2706 | reloc_entry->address += input_section->output_offset; |
| 2707 | return bfd_reloc_ok; |
| 2708 | } |
| 2709 | |
| 2710 | if (output_bfd != NULL) |
| 2711 | /* FIXME: See bfd_perform_relocation. Is this right? */ |
| 2712 | return bfd_reloc_continue; |
| 2713 | |
| 2714 | return nios2_elf32_do_callr_relocate (abfd, reloc_entry->howto, |
| 2715 | input_section, |
| 2716 | data, reloc_entry->address, |
| 2717 | (symbol->value |
| 2718 | + symbol->section->output_section->vma |
| 2719 | + symbol->section->output_offset), |
| 2720 | reloc_entry->addend); |
| 2721 | } |
| 2722 | |
| 2723 | |
| 2724 | /* Implement elf_backend_relocate_section. */ |
| 2725 | static bfd_boolean |
| 2726 | nios2_elf32_relocate_section (bfd *output_bfd, |
| 2727 | struct bfd_link_info *info, |
| 2728 | bfd *input_bfd, |
| 2729 | asection *input_section, |
| 2730 | bfd_byte *contents, |
| 2731 | Elf_Internal_Rela *relocs, |
| 2732 | Elf_Internal_Sym *local_syms, |
| 2733 | asection **local_sections) |
| 2734 | { |
| 2735 | Elf_Internal_Shdr *symtab_hdr; |
| 2736 | struct elf_link_hash_entry **sym_hashes; |
| 2737 | Elf_Internal_Rela *rel; |
| 2738 | Elf_Internal_Rela *relend; |
| 2739 | struct elf32_nios2_link_hash_table *htab; |
| 2740 | asection *sgot; |
| 2741 | asection *splt; |
| 2742 | asection *sreloc = NULL; |
| 2743 | bfd_vma *local_got_offsets; |
| 2744 | bfd_vma got_base; |
| 2745 | |
| 2746 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 2747 | sym_hashes = elf_sym_hashes (input_bfd); |
| 2748 | relend = relocs + input_section->reloc_count; |
| 2749 | |
| 2750 | htab = elf32_nios2_hash_table (info); |
| 2751 | sgot = htab->root.sgot; |
| 2752 | splt = htab->root.splt; |
| 2753 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 2754 | |
| 2755 | if (elf32_nios2_hash_table (info)->h_gp_got == NULL) |
| 2756 | got_base = 0; |
| 2757 | else |
| 2758 | got_base = elf32_nios2_hash_table (info)->h_gp_got->root.u.def.value; |
| 2759 | |
| 2760 | for (rel = relocs; rel < relend; rel++) |
| 2761 | { |
| 2762 | reloc_howto_type *howto; |
| 2763 | unsigned long r_symndx; |
| 2764 | Elf_Internal_Sym *sym; |
| 2765 | asection *sec; |
| 2766 | struct elf_link_hash_entry *h; |
| 2767 | struct elf32_nios2_link_hash_entry *eh; |
| 2768 | bfd_vma relocation; |
| 2769 | bfd_vma gp; |
| 2770 | bfd_vma reloc_address; |
| 2771 | bfd_reloc_status_type r = bfd_reloc_ok; |
| 2772 | const char *name = NULL; |
| 2773 | int r_type; |
| 2774 | const char *format; |
| 2775 | char msgbuf[256]; |
| 2776 | const char* msg = (const char*) NULL; |
| 2777 | bfd_boolean unresolved_reloc; |
| 2778 | bfd_vma off; |
| 2779 | int use_plt; |
| 2780 | |
| 2781 | r_type = ELF32_R_TYPE (rel->r_info); |
| 2782 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2783 | |
| 2784 | howto = lookup_howto ((unsigned) ELF32_R_TYPE (rel->r_info)); |
| 2785 | h = NULL; |
| 2786 | sym = NULL; |
| 2787 | sec = NULL; |
| 2788 | |
| 2789 | if (r_symndx < symtab_hdr->sh_info) |
| 2790 | { |
| 2791 | sym = local_syms + r_symndx; |
| 2792 | sec = local_sections[r_symndx]; |
| 2793 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 2794 | } |
| 2795 | else |
| 2796 | { |
| 2797 | bfd_boolean warned, ignored; |
| 2798 | |
| 2799 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 2800 | r_symndx, symtab_hdr, sym_hashes, |
| 2801 | h, sec, relocation, |
| 2802 | unresolved_reloc, warned, ignored); |
| 2803 | } |
| 2804 | |
| 2805 | if (sec && discarded_section (sec)) |
| 2806 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 2807 | rel, 1, relend, howto, 0, contents); |
| 2808 | |
| 2809 | /* Nothing more to do unless this is a final link. */ |
| 2810 | if (info->relocatable) |
| 2811 | continue; |
| 2812 | |
| 2813 | if (sec && sec->output_section) |
| 2814 | reloc_address = (sec->output_section->vma + sec->output_offset |
| 2815 | + rel->r_offset); |
| 2816 | else |
| 2817 | reloc_address = 0; |
| 2818 | |
| 2819 | if (howto) |
| 2820 | { |
| 2821 | switch (howto->type) |
| 2822 | { |
| 2823 | case R_NIOS2_HI16: |
| 2824 | r = nios2_elf32_do_hi16_relocate (input_bfd, howto, |
| 2825 | input_section, |
| 2826 | contents, rel->r_offset, |
| 2827 | relocation, rel->r_addend); |
| 2828 | break; |
| 2829 | case R_NIOS2_LO16: |
| 2830 | r = nios2_elf32_do_lo16_relocate (input_bfd, howto, |
| 2831 | input_section, |
| 2832 | contents, rel->r_offset, |
| 2833 | relocation, rel->r_addend); |
| 2834 | break; |
| 2835 | case R_NIOS2_PCREL_LO: |
| 2836 | r = nios2_elf32_do_pcrel_lo16_relocate (input_bfd, howto, |
| 2837 | input_section, |
| 2838 | contents, |
| 2839 | rel->r_offset, |
| 2840 | relocation, |
| 2841 | rel->r_addend); |
| 2842 | break; |
| 2843 | case R_NIOS2_HIADJ16: |
| 2844 | r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto, |
| 2845 | input_section, contents, |
| 2846 | rel->r_offset, relocation, |
| 2847 | rel->r_addend); |
| 2848 | break; |
| 2849 | case R_NIOS2_PCREL_HA: |
| 2850 | r = nios2_elf32_do_pcrel_hiadj16_relocate (input_bfd, howto, |
| 2851 | input_section, |
| 2852 | contents, |
| 2853 | rel->r_offset, |
| 2854 | relocation, |
| 2855 | rel->r_addend); |
| 2856 | break; |
| 2857 | case R_NIOS2_PCREL16: |
| 2858 | r = nios2_elf32_do_pcrel16_relocate (input_bfd, howto, |
| 2859 | input_section, contents, |
| 2860 | rel->r_offset, relocation, |
| 2861 | rel->r_addend); |
| 2862 | break; |
| 2863 | case R_NIOS2_GPREL: |
| 2864 | /* Turns an absolute address into a gp-relative address. */ |
| 2865 | if (!nios2_elf_assign_gp (output_bfd, &gp, info)) |
| 2866 | { |
| 2867 | format = _("global pointer relative relocation at address " |
| 2868 | "0x%08x when _gp not defined\n"); |
| 2869 | sprintf (msgbuf, format, reloc_address); |
| 2870 | msg = msgbuf; |
| 2871 | r = bfd_reloc_dangerous; |
| 2872 | } |
| 2873 | else |
| 2874 | { |
| 2875 | bfd_vma symbol_address = rel->r_addend + relocation; |
| 2876 | relocation = relocation + rel->r_addend - gp; |
| 2877 | rel->r_addend = 0; |
| 2878 | if (((signed) relocation < -32768 |
| 2879 | || (signed) relocation > 32767) |
| 2880 | && (!h |
| 2881 | || h->root.type == bfd_link_hash_defined |
| 2882 | || h->root.type == bfd_link_hash_defweak)) |
| 2883 | { |
| 2884 | format = _("Unable to reach %s (at 0x%08x) from the " |
| 2885 | "global pointer (at 0x%08x) because the " |
| 2886 | "offset (%d) is out of the allowed range, " |
| 2887 | "-32678 to 32767.\n" ); |
| 2888 | sprintf (msgbuf, format, name, symbol_address, gp, |
| 2889 | (signed)relocation); |
| 2890 | msg = msgbuf; |
| 2891 | r = bfd_reloc_outofrange; |
| 2892 | } |
| 2893 | else |
| 2894 | r = _bfd_final_link_relocate (howto, input_bfd, |
| 2895 | input_section, contents, |
| 2896 | rel->r_offset, relocation, |
| 2897 | rel->r_addend); |
| 2898 | } |
| 2899 | |
| 2900 | break; |
| 2901 | case R_NIOS2_UJMP: |
| 2902 | r = nios2_elf32_do_ujmp_relocate (input_bfd, howto, |
| 2903 | input_section, |
| 2904 | contents, rel->r_offset, |
| 2905 | relocation, rel->r_addend); |
| 2906 | break; |
| 2907 | case R_NIOS2_CJMP: |
| 2908 | r = nios2_elf32_do_cjmp_relocate (input_bfd, howto, |
| 2909 | input_section, |
| 2910 | contents, rel->r_offset, |
| 2911 | relocation, rel->r_addend); |
| 2912 | break; |
| 2913 | case R_NIOS2_CALLR: |
| 2914 | r = nios2_elf32_do_callr_relocate (input_bfd, howto, |
| 2915 | input_section, contents, |
| 2916 | rel->r_offset, relocation, |
| 2917 | rel->r_addend); |
| 2918 | break; |
| 2919 | case R_NIOS2_CALL26: |
| 2920 | case R_NIOS2_CALL26_NOAT: |
| 2921 | /* If we have a call to an undefined weak symbol, we just want |
| 2922 | to stuff a zero in the bits of the call instruction and |
| 2923 | bypass the normal call26 relocation handling, because it'll |
| 2924 | diagnose an overflow error if address 0 isn't in the same |
| 2925 | 256MB segment as the call site. Presumably the call |
| 2926 | should be guarded by a null check anyway. */ |
| 2927 | if (h != NULL && h->root.type == bfd_link_hash_undefweak) |
| 2928 | { |
| 2929 | BFD_ASSERT (relocation == 0 && rel->r_addend == 0); |
| 2930 | r = _bfd_final_link_relocate (howto, input_bfd, |
| 2931 | input_section, contents, |
| 2932 | rel->r_offset, relocation, |
| 2933 | rel->r_addend); |
| 2934 | break; |
| 2935 | } |
| 2936 | /* Handle relocations which should use the PLT entry. |
| 2937 | NIOS2_BFD_RELOC_32 relocations will use the symbol's value, |
| 2938 | which may point to a PLT entry, but we don't need to handle |
| 2939 | that here. If we created a PLT entry, all branches in this |
| 2940 | object should go to it. */ |
| 2941 | if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1) |
| 2942 | { |
| 2943 | /* If we've created a .plt section, and assigned a PLT entry |
| 2944 | to this function, it should not be known to bind locally. |
| 2945 | If it were, we would have cleared the PLT entry. */ |
| 2946 | BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h)); |
| 2947 | |
| 2948 | relocation = (splt->output_section->vma |
| 2949 | + splt->output_offset |
| 2950 | + h->plt.offset); |
| 2951 | |
| 2952 | unresolved_reloc = FALSE; |
| 2953 | } |
| 2954 | /* Detect R_NIOS2_CALL26 relocations that would overflow the |
| 2955 | 256MB segment. Replace the target with a reference to a |
| 2956 | trampoline instead. |
| 2957 | Note that htab->stub_group is null if relaxation has been |
| 2958 | disabled by the --no-relax linker command-line option, so |
| 2959 | we can use that to skip this processing entirely. */ |
| 2960 | if (howto->type == R_NIOS2_CALL26 && htab->stub_group) |
| 2961 | { |
| 2962 | bfd_vma dest = relocation + rel->r_addend; |
| 2963 | enum elf32_nios2_stub_type stub_type; |
| 2964 | |
| 2965 | eh = (struct elf32_nios2_link_hash_entry *)h; |
| 2966 | stub_type = nios2_type_of_stub (input_section, rel, eh, |
| 2967 | htab, dest, NULL); |
| 2968 | |
| 2969 | if (stub_type != nios2_stub_none) |
| 2970 | { |
| 2971 | struct elf32_nios2_stub_hash_entry *hsh; |
| 2972 | |
| 2973 | hsh = nios2_get_stub_entry (input_section, sec, |
| 2974 | eh, rel, htab, stub_type); |
| 2975 | if (hsh == NULL) |
| 2976 | { |
| 2977 | r = bfd_reloc_undefined; |
| 2978 | break; |
| 2979 | } |
| 2980 | |
| 2981 | dest = (hsh->stub_offset |
| 2982 | + hsh->stub_sec->output_offset |
| 2983 | + hsh->stub_sec->output_section->vma); |
| 2984 | r = nios2_elf32_do_call26_relocate (input_bfd, howto, |
| 2985 | input_section, |
| 2986 | contents, |
| 2987 | rel->r_offset, |
| 2988 | dest, 0); |
| 2989 | break; |
| 2990 | } |
| 2991 | } |
| 2992 | |
| 2993 | /* Normal case. */ |
| 2994 | r = nios2_elf32_do_call26_relocate (input_bfd, howto, |
| 2995 | input_section, contents, |
| 2996 | rel->r_offset, relocation, |
| 2997 | rel->r_addend); |
| 2998 | break; |
| 2999 | case R_NIOS2_ALIGN: |
| 3000 | r = bfd_reloc_ok; |
| 3001 | /* For symmetry this would be |
| 3002 | r = nios2_elf32_do_ignore_reloc (input_bfd, howto, |
| 3003 | input_section, contents, |
| 3004 | rel->r_offset, relocation, |
| 3005 | rel->r_addend); |
| 3006 | but do_ignore_reloc would do no more than return |
| 3007 | bfd_reloc_ok. */ |
| 3008 | break; |
| 3009 | |
| 3010 | case R_NIOS2_GOT16: |
| 3011 | case R_NIOS2_CALL16: |
| 3012 | case R_NIOS2_GOT_LO: |
| 3013 | case R_NIOS2_GOT_HA: |
| 3014 | case R_NIOS2_CALL_LO: |
| 3015 | case R_NIOS2_CALL_HA: |
| 3016 | /* Relocation is to the entry for this symbol in the |
| 3017 | global offset table. */ |
| 3018 | if (sgot == NULL) |
| 3019 | { |
| 3020 | r = bfd_reloc_notsupported; |
| 3021 | break; |
| 3022 | } |
| 3023 | |
| 3024 | use_plt = 0; |
| 3025 | |
| 3026 | if (h != NULL) |
| 3027 | { |
| 3028 | bfd_boolean dyn; |
| 3029 | |
| 3030 | eh = (struct elf32_nios2_link_hash_entry *)h; |
| 3031 | use_plt = (eh->got_types_used == CALL_USED |
| 3032 | && h->plt.offset != (bfd_vma) -1); |
| 3033 | |
| 3034 | off = h->got.offset; |
| 3035 | BFD_ASSERT (off != (bfd_vma) -1); |
| 3036 | dyn = elf_hash_table (info)->dynamic_sections_created; |
| 3037 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 3038 | || (info->shared |
| 3039 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 3040 | || (ELF_ST_VISIBILITY (h->other) |
| 3041 | && h->root.type == bfd_link_hash_undefweak)) |
| 3042 | { |
| 3043 | /* This is actually a static link, or it is a -Bsymbolic |
| 3044 | link and the symbol is defined locally. We must |
| 3045 | initialize this entry in the global offset table. |
| 3046 | Since the offset must always be a multiple of 4, we |
| 3047 | use the least significant bit to record whether we |
| 3048 | have initialized it already. |
| 3049 | |
| 3050 | When doing a dynamic link, we create a .rela.got |
| 3051 | relocation entry to initialize the value. This is |
| 3052 | done in the finish_dynamic_symbol routine. */ |
| 3053 | if ((off & 1) != 0) |
| 3054 | off &= ~1; |
| 3055 | else |
| 3056 | { |
| 3057 | bfd_put_32 (output_bfd, relocation, |
| 3058 | sgot->contents + off); |
| 3059 | h->got.offset |= 1; |
| 3060 | } |
| 3061 | } |
| 3062 | else |
| 3063 | unresolved_reloc = FALSE; |
| 3064 | } |
| 3065 | else |
| 3066 | { |
| 3067 | BFD_ASSERT (local_got_offsets != NULL |
| 3068 | && local_got_offsets[r_symndx] != (bfd_vma) -1); |
| 3069 | |
| 3070 | off = local_got_offsets[r_symndx]; |
| 3071 | |
| 3072 | /* The offset must always be a multiple of 4. We use the |
| 3073 | least significant bit to record whether we have already |
| 3074 | generated the necessary reloc. */ |
| 3075 | if ((off & 1) != 0) |
| 3076 | off &= ~1; |
| 3077 | else |
| 3078 | { |
| 3079 | bfd_put_32 (output_bfd, relocation, |
| 3080 | sgot->contents + off); |
| 3081 | |
| 3082 | if (info->shared) |
| 3083 | { |
| 3084 | asection *srelgot; |
| 3085 | Elf_Internal_Rela outrel; |
| 3086 | bfd_byte *loc; |
| 3087 | |
| 3088 | srelgot = htab->root.srelgot; |
| 3089 | BFD_ASSERT (srelgot != NULL); |
| 3090 | |
| 3091 | outrel.r_addend = relocation; |
| 3092 | outrel.r_offset = (sgot->output_section->vma |
| 3093 | + sgot->output_offset |
| 3094 | + off); |
| 3095 | outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE); |
| 3096 | loc = srelgot->contents; |
| 3097 | loc += (srelgot->reloc_count++ * |
| 3098 | sizeof (Elf32_External_Rela)); |
| 3099 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 3100 | } |
| 3101 | |
| 3102 | local_got_offsets[r_symndx] |= 1; |
| 3103 | } |
| 3104 | } |
| 3105 | |
| 3106 | if (use_plt && info->shared) |
| 3107 | { |
| 3108 | off = ((h->plt.offset - 24) / 12 + 3) * 4; |
| 3109 | relocation = (htab->root.sgotplt->output_offset + off |
| 3110 | - got_base); |
| 3111 | } |
| 3112 | else |
| 3113 | relocation = sgot->output_offset + off - got_base; |
| 3114 | |
| 3115 | /* This relocation does not use the addend. */ |
| 3116 | rel->r_addend = 0; |
| 3117 | |
| 3118 | switch (howto->type) |
| 3119 | { |
| 3120 | case R_NIOS2_GOT_LO: |
| 3121 | case R_NIOS2_CALL_LO: |
| 3122 | r = nios2_elf32_do_lo16_relocate (input_bfd, howto, |
| 3123 | input_section, contents, |
| 3124 | rel->r_offset, relocation, |
| 3125 | rel->r_addend); |
| 3126 | break; |
| 3127 | case R_NIOS2_GOT_HA: |
| 3128 | case R_NIOS2_CALL_HA: |
| 3129 | r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto, |
| 3130 | input_section, contents, |
| 3131 | rel->r_offset, |
| 3132 | relocation, |
| 3133 | rel->r_addend); |
| 3134 | break; |
| 3135 | default: |
| 3136 | r = _bfd_final_link_relocate (howto, input_bfd, |
| 3137 | input_section, contents, |
| 3138 | rel->r_offset, relocation, |
| 3139 | rel->r_addend); |
| 3140 | break; |
| 3141 | } |
| 3142 | break; |
| 3143 | |
| 3144 | case R_NIOS2_GOTOFF_LO: |
| 3145 | case R_NIOS2_GOTOFF_HA: |
| 3146 | case R_NIOS2_GOTOFF: |
| 3147 | /* Relocation is relative to the global offset table pointer. */ |
| 3148 | |
| 3149 | BFD_ASSERT (sgot != NULL); |
| 3150 | if (sgot == NULL) |
| 3151 | { |
| 3152 | r = bfd_reloc_notsupported; |
| 3153 | break; |
| 3154 | } |
| 3155 | |
| 3156 | /* Note that sgot->output_offset is not involved in this |
| 3157 | calculation. We always want the start of .got. */ |
| 3158 | relocation -= sgot->output_section->vma; |
| 3159 | |
| 3160 | /* Now we adjust the relocation to be relative to the GOT pointer |
| 3161 | (the _gp_got symbol), which possibly contains the 0x8000 bias. */ |
| 3162 | relocation -= got_base; |
| 3163 | |
| 3164 | switch (howto->type) |
| 3165 | { |
| 3166 | case R_NIOS2_GOTOFF_LO: |
| 3167 | r = nios2_elf32_do_lo16_relocate (input_bfd, howto, |
| 3168 | input_section, contents, |
| 3169 | rel->r_offset, relocation, |
| 3170 | rel->r_addend); |
| 3171 | break; |
| 3172 | case R_NIOS2_GOTOFF_HA: |
| 3173 | r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto, |
| 3174 | input_section, contents, |
| 3175 | rel->r_offset, |
| 3176 | relocation, |
| 3177 | rel->r_addend); |
| 3178 | break; |
| 3179 | default: |
| 3180 | r = _bfd_final_link_relocate (howto, input_bfd, |
| 3181 | input_section, contents, |
| 3182 | rel->r_offset, relocation, |
| 3183 | rel->r_addend); |
| 3184 | break; |
| 3185 | } |
| 3186 | break; |
| 3187 | |
| 3188 | case R_NIOS2_TLS_LDO16: |
| 3189 | relocation -= dtpoff_base (info) + DTP_OFFSET; |
| 3190 | |
| 3191 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3192 | contents, rel->r_offset, |
| 3193 | relocation, rel->r_addend); |
| 3194 | break; |
| 3195 | case R_NIOS2_TLS_LDM16: |
| 3196 | if (htab->root.sgot == NULL) |
| 3197 | abort (); |
| 3198 | |
| 3199 | off = htab->tls_ldm_got.offset; |
| 3200 | |
| 3201 | if ((off & 1) != 0) |
| 3202 | off &= ~1; |
| 3203 | else |
| 3204 | { |
| 3205 | /* If we don't know the module number, create a relocation |
| 3206 | for it. */ |
| 3207 | if (info->shared) |
| 3208 | { |
| 3209 | Elf_Internal_Rela outrel; |
| 3210 | bfd_byte *loc; |
| 3211 | |
| 3212 | if (htab->root.srelgot == NULL) |
| 3213 | abort (); |
| 3214 | |
| 3215 | outrel.r_addend = 0; |
| 3216 | outrel.r_offset = (htab->root.sgot->output_section->vma |
| 3217 | + htab->root.sgot->output_offset |
| 3218 | + off); |
| 3219 | outrel.r_info = ELF32_R_INFO (0, R_NIOS2_TLS_DTPMOD); |
| 3220 | |
| 3221 | loc = htab->root.srelgot->contents; |
| 3222 | loc += (htab->root.srelgot->reloc_count++ |
| 3223 | * sizeof (Elf32_External_Rela)); |
| 3224 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 3225 | } |
| 3226 | else |
| 3227 | bfd_put_32 (output_bfd, 1, |
| 3228 | htab->root.sgot->contents + off); |
| 3229 | |
| 3230 | htab->tls_ldm_got.offset |= 1; |
| 3231 | } |
| 3232 | |
| 3233 | relocation = htab->root.sgot->output_offset + off - got_base; |
| 3234 | |
| 3235 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3236 | contents, rel->r_offset, |
| 3237 | relocation, rel->r_addend); |
| 3238 | |
| 3239 | break; |
| 3240 | case R_NIOS2_TLS_GD16: |
| 3241 | case R_NIOS2_TLS_IE16: |
| 3242 | { |
| 3243 | int indx; |
| 3244 | char tls_type; |
| 3245 | |
| 3246 | if (htab->root.sgot == NULL) |
| 3247 | abort (); |
| 3248 | |
| 3249 | indx = 0; |
| 3250 | if (h != NULL) |
| 3251 | { |
| 3252 | bfd_boolean dyn; |
| 3253 | dyn = htab->root.dynamic_sections_created; |
| 3254 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 3255 | && (!info->shared |
| 3256 | || !SYMBOL_REFERENCES_LOCAL (info, h))) |
| 3257 | { |
| 3258 | unresolved_reloc = FALSE; |
| 3259 | indx = h->dynindx; |
| 3260 | } |
| 3261 | off = h->got.offset; |
| 3262 | tls_type = (((struct elf32_nios2_link_hash_entry *) h) |
| 3263 | ->tls_type); |
| 3264 | } |
| 3265 | else |
| 3266 | { |
| 3267 | if (local_got_offsets == NULL) |
| 3268 | abort (); |
| 3269 | off = local_got_offsets[r_symndx]; |
| 3270 | tls_type = (elf32_nios2_local_got_tls_type (input_bfd) |
| 3271 | [r_symndx]); |
| 3272 | } |
| 3273 | |
| 3274 | if (tls_type == GOT_UNKNOWN) |
| 3275 | abort (); |
| 3276 | |
| 3277 | if ((off & 1) != 0) |
| 3278 | off &= ~1; |
| 3279 | else |
| 3280 | { |
| 3281 | bfd_boolean need_relocs = FALSE; |
| 3282 | Elf_Internal_Rela outrel; |
| 3283 | bfd_byte *loc = NULL; |
| 3284 | int cur_off = off; |
| 3285 | |
| 3286 | /* The GOT entries have not been initialized yet. Do it |
| 3287 | now, and emit any relocations. If both an IE GOT and a |
| 3288 | GD GOT are necessary, we emit the GD first. */ |
| 3289 | |
| 3290 | if ((info->shared || indx != 0) |
| 3291 | && (h == NULL |
| 3292 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 3293 | || h->root.type != bfd_link_hash_undefweak)) |
| 3294 | { |
| 3295 | need_relocs = TRUE; |
| 3296 | if (htab->root.srelgot == NULL) |
| 3297 | abort (); |
| 3298 | loc = htab->root.srelgot->contents; |
| 3299 | loc += (htab->root.srelgot->reloc_count * |
| 3300 | sizeof (Elf32_External_Rela)); |
| 3301 | } |
| 3302 | |
| 3303 | if (tls_type & GOT_TLS_GD) |
| 3304 | { |
| 3305 | if (need_relocs) |
| 3306 | { |
| 3307 | outrel.r_addend = 0; |
| 3308 | outrel.r_offset = (htab->root.sgot->output_section->vma |
| 3309 | + htab->root.sgot->output_offset |
| 3310 | + cur_off); |
| 3311 | outrel.r_info = ELF32_R_INFO (indx, |
| 3312 | R_NIOS2_TLS_DTPMOD); |
| 3313 | |
| 3314 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 3315 | loc); |
| 3316 | htab->root.srelgot->reloc_count++; |
| 3317 | loc += sizeof (Elf32_External_Rela); |
| 3318 | |
| 3319 | if (indx == 0) |
| 3320 | bfd_put_32 (output_bfd, |
| 3321 | (relocation - dtpoff_base (info) - |
| 3322 | DTP_OFFSET), |
| 3323 | htab->root.sgot->contents + cur_off + 4); |
| 3324 | else |
| 3325 | { |
| 3326 | outrel.r_addend = 0; |
| 3327 | outrel.r_info = ELF32_R_INFO (indx, |
| 3328 | R_NIOS2_TLS_DTPREL); |
| 3329 | outrel.r_offset += 4; |
| 3330 | |
| 3331 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 3332 | loc); |
| 3333 | htab->root.srelgot->reloc_count++; |
| 3334 | loc += sizeof (Elf32_External_Rela); |
| 3335 | } |
| 3336 | } |
| 3337 | else |
| 3338 | { |
| 3339 | /* If we are not emitting relocations for a |
| 3340 | general dynamic reference, then we must be in a |
| 3341 | static link or an executable link with the |
| 3342 | symbol binding locally. Mark it as belonging |
| 3343 | to module 1, the executable. */ |
| 3344 | bfd_put_32 (output_bfd, 1, |
| 3345 | htab->root.sgot->contents + cur_off); |
| 3346 | bfd_put_32 (output_bfd, (relocation - |
| 3347 | dtpoff_base (info) - |
| 3348 | DTP_OFFSET), |
| 3349 | htab->root.sgot->contents + cur_off + 4); |
| 3350 | } |
| 3351 | |
| 3352 | cur_off += 8; |
| 3353 | } |
| 3354 | |
| 3355 | if (tls_type & GOT_TLS_IE) |
| 3356 | { |
| 3357 | if (need_relocs) |
| 3358 | { |
| 3359 | if (indx == 0) |
| 3360 | outrel.r_addend = (relocation - |
| 3361 | dtpoff_base (info)); |
| 3362 | else |
| 3363 | outrel.r_addend = 0; |
| 3364 | outrel.r_offset = (htab->root.sgot->output_section->vma |
| 3365 | + htab->root.sgot->output_offset |
| 3366 | + cur_off); |
| 3367 | outrel.r_info = ELF32_R_INFO (indx, |
| 3368 | R_NIOS2_TLS_TPREL); |
| 3369 | |
| 3370 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 3371 | loc); |
| 3372 | htab->root.srelgot->reloc_count++; |
| 3373 | loc += sizeof (Elf32_External_Rela); |
| 3374 | } |
| 3375 | else |
| 3376 | bfd_put_32 (output_bfd, (tpoff (info, relocation) |
| 3377 | - TP_OFFSET), |
| 3378 | htab->root.sgot->contents + cur_off); |
| 3379 | cur_off += 4; |
| 3380 | } |
| 3381 | |
| 3382 | if (h != NULL) |
| 3383 | h->got.offset |= 1; |
| 3384 | else |
| 3385 | local_got_offsets[r_symndx] |= 1; |
| 3386 | } |
| 3387 | |
| 3388 | if ((tls_type & GOT_TLS_GD) && r_type != R_NIOS2_TLS_GD16) |
| 3389 | off += 8; |
| 3390 | relocation = htab->root.sgot->output_offset + off - got_base; |
| 3391 | |
| 3392 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3393 | contents, rel->r_offset, |
| 3394 | relocation, rel->r_addend); |
| 3395 | } |
| 3396 | |
| 3397 | break; |
| 3398 | case R_NIOS2_TLS_LE16: |
| 3399 | if (info->shared && !info->pie) |
| 3400 | { |
| 3401 | (*_bfd_error_handler) |
| 3402 | (_("%B(%A+0x%lx): R_NIOS2_TLS_LE16 relocation not " |
| 3403 | "permitted in shared object"), |
| 3404 | input_bfd, input_section, |
| 3405 | (long) rel->r_offset, howto->name); |
| 3406 | return FALSE; |
| 3407 | } |
| 3408 | else |
| 3409 | relocation = tpoff (info, relocation) - TP_OFFSET; |
| 3410 | |
| 3411 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3412 | contents, rel->r_offset, |
| 3413 | relocation, rel->r_addend); |
| 3414 | break; |
| 3415 | |
| 3416 | case R_NIOS2_BFD_RELOC_32: |
| 3417 | if (info->shared |
| 3418 | && (input_section->flags & SEC_ALLOC) != 0 |
| 3419 | && (h == NULL |
| 3420 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 3421 | || h->root.type != bfd_link_hash_undefweak)) |
| 3422 | { |
| 3423 | Elf_Internal_Rela outrel; |
| 3424 | bfd_byte *loc; |
| 3425 | bfd_boolean skip, relocate; |
| 3426 | |
| 3427 | /* When generating a shared object, these relocations |
| 3428 | are copied into the output file to be resolved at run |
| 3429 | time. */ |
| 3430 | |
| 3431 | skip = FALSE; |
| 3432 | relocate = FALSE; |
| 3433 | |
| 3434 | outrel.r_offset |
| 3435 | = _bfd_elf_section_offset (output_bfd, info, |
| 3436 | input_section, rel->r_offset); |
| 3437 | if (outrel.r_offset == (bfd_vma) -1) |
| 3438 | skip = TRUE; |
| 3439 | else if (outrel.r_offset == (bfd_vma) -2) |
| 3440 | skip = TRUE, relocate = TRUE; |
| 3441 | outrel.r_offset += (input_section->output_section->vma |
| 3442 | + input_section->output_offset); |
| 3443 | |
| 3444 | if (skip) |
| 3445 | memset (&outrel, 0, sizeof outrel); |
| 3446 | else if (h != NULL |
| 3447 | && h->dynindx != -1 |
| 3448 | && (!info->shared |
| 3449 | || !info->symbolic |
| 3450 | || !h->def_regular)) |
| 3451 | { |
| 3452 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 3453 | outrel.r_addend = rel->r_addend; |
| 3454 | } |
| 3455 | else |
| 3456 | { |
| 3457 | /* This symbol is local, or marked to become local. */ |
| 3458 | outrel.r_addend = relocation + rel->r_addend; |
| 3459 | relocate = TRUE; |
| 3460 | outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE); |
| 3461 | } |
| 3462 | |
| 3463 | sreloc = elf_section_data (input_section)->sreloc; |
| 3464 | if (sreloc == NULL) |
| 3465 | abort (); |
| 3466 | |
| 3467 | loc = sreloc->contents; |
| 3468 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); |
| 3469 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 3470 | |
| 3471 | /* This reloc will be computed at runtime, so there's no |
| 3472 | need to do anything now, except for R_NIOS2_BFD_RELOC_32 |
| 3473 | relocations that have been turned into |
| 3474 | R_NIOS2_RELATIVE. */ |
| 3475 | if (!relocate) |
| 3476 | break; |
| 3477 | } |
| 3478 | |
| 3479 | r = _bfd_final_link_relocate (howto, input_bfd, |
| 3480 | input_section, contents, |
| 3481 | rel->r_offset, relocation, |
| 3482 | rel->r_addend); |
| 3483 | break; |
| 3484 | |
| 3485 | case R_NIOS2_TLS_DTPREL: |
| 3486 | relocation -= dtpoff_base (info); |
| 3487 | /* Fall through. */ |
| 3488 | |
| 3489 | default: |
| 3490 | r = _bfd_final_link_relocate (howto, input_bfd, |
| 3491 | input_section, contents, |
| 3492 | rel->r_offset, relocation, |
| 3493 | rel->r_addend); |
| 3494 | break; |
| 3495 | } |
| 3496 | } |
| 3497 | else |
| 3498 | r = bfd_reloc_notsupported; |
| 3499 | |
| 3500 | if (r != bfd_reloc_ok) |
| 3501 | { |
| 3502 | if (h != NULL) |
| 3503 | name = h->root.root.string; |
| 3504 | else |
| 3505 | { |
| 3506 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 3507 | symtab_hdr->sh_link, |
| 3508 | sym->st_name); |
| 3509 | if (name == NULL || *name == '\0') |
| 3510 | name = bfd_section_name (input_bfd, sec); |
| 3511 | } |
| 3512 | |
| 3513 | switch (r) |
| 3514 | { |
| 3515 | case bfd_reloc_overflow: |
| 3516 | r = info->callbacks->reloc_overflow (info, NULL, name, |
| 3517 | howto->name, (bfd_vma) 0, |
| 3518 | input_bfd, input_section, |
| 3519 | rel->r_offset); |
| 3520 | break; |
| 3521 | |
| 3522 | case bfd_reloc_undefined: |
| 3523 | r = info->callbacks->undefined_symbol (info, name, input_bfd, |
| 3524 | input_section, |
| 3525 | rel->r_offset, TRUE); |
| 3526 | break; |
| 3527 | |
| 3528 | case bfd_reloc_outofrange: |
| 3529 | if (msg == NULL) |
| 3530 | msg = _("relocation out of range"); |
| 3531 | break; |
| 3532 | |
| 3533 | case bfd_reloc_notsupported: |
| 3534 | if (msg == NULL) |
| 3535 | msg = _("unsupported relocation"); |
| 3536 | break; |
| 3537 | |
| 3538 | case bfd_reloc_dangerous: |
| 3539 | if (msg == NULL) |
| 3540 | msg = _("dangerous relocation"); |
| 3541 | break; |
| 3542 | |
| 3543 | default: |
| 3544 | if (msg == NULL) |
| 3545 | msg = _("unknown error"); |
| 3546 | break; |
| 3547 | } |
| 3548 | |
| 3549 | if (msg) |
| 3550 | { |
| 3551 | r = info->callbacks->warning |
| 3552 | (info, msg, name, input_bfd, input_section, rel->r_offset); |
| 3553 | return FALSE; |
| 3554 | } |
| 3555 | } |
| 3556 | } |
| 3557 | return TRUE; |
| 3558 | } |
| 3559 | |
| 3560 | /* Implement elf-backend_section_flags: |
| 3561 | Convert NIOS2 specific section flags to bfd internal section flags. */ |
| 3562 | static bfd_boolean |
| 3563 | nios2_elf32_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr) |
| 3564 | { |
| 3565 | if (hdr->sh_flags & SHF_NIOS2_GPREL) |
| 3566 | *flags |= SEC_SMALL_DATA; |
| 3567 | |
| 3568 | return TRUE; |
| 3569 | } |
| 3570 | |
| 3571 | /* Implement elf_backend_fake_sections: |
| 3572 | Set the correct type for an NIOS2 ELF section. We do this by the |
| 3573 | section name, which is a hack, but ought to work. */ |
| 3574 | static bfd_boolean |
| 3575 | nios2_elf32_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
| 3576 | Elf_Internal_Shdr *hdr, asection *sec) |
| 3577 | { |
| 3578 | register const char *name = bfd_get_section_name (abfd, sec); |
| 3579 | |
| 3580 | if ((sec->flags & SEC_SMALL_DATA) |
| 3581 | || strcmp (name, ".sdata") == 0 |
| 3582 | || strcmp (name, ".sbss") == 0 |
| 3583 | || strcmp (name, ".lit4") == 0 || strcmp (name, ".lit8") == 0) |
| 3584 | hdr->sh_flags |= SHF_NIOS2_GPREL; |
| 3585 | |
| 3586 | return TRUE; |
| 3587 | } |
| 3588 | |
| 3589 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up |
| 3590 | shortcuts to them in our hash table. */ |
| 3591 | static bfd_boolean |
| 3592 | create_got_section (bfd *dynobj, struct bfd_link_info *info) |
| 3593 | { |
| 3594 | struct elf32_nios2_link_hash_table *htab; |
| 3595 | struct elf_link_hash_entry *h; |
| 3596 | |
| 3597 | htab = elf32_nios2_hash_table (info); |
| 3598 | |
| 3599 | if (! _bfd_elf_create_got_section (dynobj, info)) |
| 3600 | return FALSE; |
| 3601 | |
| 3602 | /* In order for the two loads in .PLTresolve to share the same %hiadj, |
| 3603 | _GLOBAL_OFFSET_TABLE_ must be aligned to a 16-byte boundary. */ |
| 3604 | if (!bfd_set_section_alignment (dynobj, htab->root.sgotplt, 4)) |
| 3605 | return FALSE; |
| 3606 | |
| 3607 | /* The Nios II ABI specifies that GOT-relative relocations are relative |
| 3608 | to the linker-created symbol _gp_got, rather than using |
| 3609 | _GLOBAL_OFFSET_TABLE_ directly. In particular, the latter always |
| 3610 | points to the base of the GOT while _gp_got may include a bias. */ |
| 3611 | h = _bfd_elf_define_linkage_sym (dynobj, info, htab->root.sgotplt, |
| 3612 | "_gp_got"); |
| 3613 | elf32_nios2_hash_table (info)->h_gp_got = h; |
| 3614 | if (h == NULL) |
| 3615 | return FALSE; |
| 3616 | |
| 3617 | return TRUE; |
| 3618 | } |
| 3619 | |
| 3620 | /* Implement elf_backend_create_dynamic_sections: |
| 3621 | Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
| 3622 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our |
| 3623 | hash table. */ |
| 3624 | static bfd_boolean |
| 3625 | nios2_elf32_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
| 3626 | { |
| 3627 | struct elf32_nios2_link_hash_table *htab; |
| 3628 | |
| 3629 | htab = elf32_nios2_hash_table (info); |
| 3630 | if (!htab->root.sgot && !create_got_section (dynobj, info)) |
| 3631 | return FALSE; |
| 3632 | |
| 3633 | _bfd_elf_create_dynamic_sections (dynobj, info); |
| 3634 | |
| 3635 | /* In order for the two loads in a shared object .PLTresolve to share the |
| 3636 | same %hiadj, the start of the PLT (as well as the GOT) must be aligned |
| 3637 | to a 16-byte boundary. This is because the addresses for these loads |
| 3638 | include the -(.plt+4) PIC correction. */ |
| 3639 | if (!bfd_set_section_alignment (dynobj, htab->root.splt, 4)) |
| 3640 | return FALSE; |
| 3641 | |
| 3642 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
| 3643 | if (!htab->sdynbss) |
| 3644 | return FALSE; |
| 3645 | if (!info->shared) |
| 3646 | { |
| 3647 | htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); |
| 3648 | if (!htab->srelbss) |
| 3649 | return FALSE; |
| 3650 | } |
| 3651 | |
| 3652 | return TRUE; |
| 3653 | } |
| 3654 | |
| 3655 | /* Implement elf_backend_copy_indirect_symbol: |
| 3656 | Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 3657 | static void |
| 3658 | nios2_elf32_copy_indirect_symbol (struct bfd_link_info *info, |
| 3659 | struct elf_link_hash_entry *dir, |
| 3660 | struct elf_link_hash_entry *ind) |
| 3661 | { |
| 3662 | struct elf32_nios2_link_hash_entry *edir, *eind; |
| 3663 | |
| 3664 | edir = (struct elf32_nios2_link_hash_entry *) dir; |
| 3665 | eind = (struct elf32_nios2_link_hash_entry *) ind; |
| 3666 | |
| 3667 | if (eind->dyn_relocs != NULL) |
| 3668 | { |
| 3669 | if (edir->dyn_relocs != NULL) |
| 3670 | { |
| 3671 | struct elf32_nios2_dyn_relocs **pp; |
| 3672 | struct elf32_nios2_dyn_relocs *p; |
| 3673 | |
| 3674 | /* Add reloc counts against the indirect sym to the direct sym |
| 3675 | list. Merge any entries against the same section. */ |
| 3676 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) |
| 3677 | { |
| 3678 | struct elf32_nios2_dyn_relocs *q; |
| 3679 | |
| 3680 | for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| 3681 | if (q->sec == p->sec) |
| 3682 | { |
| 3683 | q->pc_count += p->pc_count; |
| 3684 | q->count += p->count; |
| 3685 | *pp = p->next; |
| 3686 | break; |
| 3687 | } |
| 3688 | if (q == NULL) |
| 3689 | pp = &p->next; |
| 3690 | } |
| 3691 | *pp = edir->dyn_relocs; |
| 3692 | } |
| 3693 | |
| 3694 | edir->dyn_relocs = eind->dyn_relocs; |
| 3695 | eind->dyn_relocs = NULL; |
| 3696 | } |
| 3697 | |
| 3698 | if (ind->root.type == bfd_link_hash_indirect |
| 3699 | && dir->got.refcount <= 0) |
| 3700 | { |
| 3701 | edir->tls_type = eind->tls_type; |
| 3702 | eind->tls_type = GOT_UNKNOWN; |
| 3703 | } |
| 3704 | |
| 3705 | edir->got_types_used |= eind->got_types_used; |
| 3706 | |
| 3707 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| 3708 | } |
| 3709 | |
| 3710 | /* Implement elf_backend_check_relocs: |
| 3711 | Look through the relocs for a section during the first phase. */ |
| 3712 | static bfd_boolean |
| 3713 | nios2_elf32_check_relocs (bfd *abfd, struct bfd_link_info *info, |
| 3714 | asection *sec, const Elf_Internal_Rela *relocs) |
| 3715 | { |
| 3716 | bfd *dynobj; |
| 3717 | Elf_Internal_Shdr *symtab_hdr; |
| 3718 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; |
| 3719 | const Elf_Internal_Rela *rel; |
| 3720 | const Elf_Internal_Rela *rel_end; |
| 3721 | struct elf32_nios2_link_hash_table *htab; |
| 3722 | asection *sgot; |
| 3723 | asection *srelgot; |
| 3724 | asection *sreloc = NULL; |
| 3725 | bfd_signed_vma *local_got_refcounts; |
| 3726 | |
| 3727 | if (info->relocatable) |
| 3728 | return TRUE; |
| 3729 | |
| 3730 | dynobj = elf_hash_table (info)->dynobj; |
| 3731 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 3732 | sym_hashes = elf_sym_hashes (abfd); |
| 3733 | sym_hashes_end = (sym_hashes |
| 3734 | + symtab_hdr->sh_size / sizeof (Elf32_External_Sym)); |
| 3735 | if (!elf_bad_symtab (abfd)) |
| 3736 | sym_hashes_end -= symtab_hdr->sh_info; |
| 3737 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 3738 | |
| 3739 | htab = elf32_nios2_hash_table (info); |
| 3740 | sgot = htab->root.sgot; |
| 3741 | srelgot = htab->root.srelgot; |
| 3742 | |
| 3743 | rel_end = relocs + sec->reloc_count; |
| 3744 | for (rel = relocs; rel < rel_end; rel++) |
| 3745 | { |
| 3746 | unsigned int r_type; |
| 3747 | struct elf_link_hash_entry *h; |
| 3748 | unsigned long r_symndx; |
| 3749 | |
| 3750 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 3751 | if (r_symndx < symtab_hdr->sh_info) |
| 3752 | h = NULL; |
| 3753 | else |
| 3754 | { |
| 3755 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3756 | while (h->root.type == bfd_link_hash_indirect |
| 3757 | || h->root.type == bfd_link_hash_warning) |
| 3758 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 3759 | |
| 3760 | /* PR15323, ref flags aren't set for references in the same |
| 3761 | object. */ |
| 3762 | h->root.non_ir_ref = 1; |
| 3763 | } |
| 3764 | |
| 3765 | r_type = ELF32_R_TYPE (rel->r_info); |
| 3766 | |
| 3767 | switch (r_type) |
| 3768 | { |
| 3769 | case R_NIOS2_GOT16: |
| 3770 | case R_NIOS2_GOT_LO: |
| 3771 | case R_NIOS2_GOT_HA: |
| 3772 | case R_NIOS2_CALL16: |
| 3773 | case R_NIOS2_CALL_LO: |
| 3774 | case R_NIOS2_CALL_HA: |
| 3775 | case R_NIOS2_TLS_GD16: |
| 3776 | case R_NIOS2_TLS_IE16: |
| 3777 | /* This symbol requires a global offset table entry. */ |
| 3778 | { |
| 3779 | int tls_type, old_tls_type; |
| 3780 | |
| 3781 | switch (r_type) |
| 3782 | { |
| 3783 | default: |
| 3784 | case R_NIOS2_GOT16: |
| 3785 | case R_NIOS2_GOT_LO: |
| 3786 | case R_NIOS2_GOT_HA: |
| 3787 | case R_NIOS2_CALL16: |
| 3788 | case R_NIOS2_CALL_LO: |
| 3789 | case R_NIOS2_CALL_HA: |
| 3790 | tls_type = GOT_NORMAL; |
| 3791 | break; |
| 3792 | case R_NIOS2_TLS_GD16: |
| 3793 | tls_type = GOT_TLS_GD; |
| 3794 | break; |
| 3795 | case R_NIOS2_TLS_IE16: |
| 3796 | tls_type = GOT_TLS_IE; |
| 3797 | break; |
| 3798 | } |
| 3799 | |
| 3800 | if (dynobj == NULL) |
| 3801 | { |
| 3802 | /* Create the .got section. */ |
| 3803 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 3804 | nios2_elf32_create_dynamic_sections (dynobj, info); |
| 3805 | } |
| 3806 | |
| 3807 | if (sgot == NULL) |
| 3808 | { |
| 3809 | sgot = htab->root.sgot; |
| 3810 | BFD_ASSERT (sgot != NULL); |
| 3811 | } |
| 3812 | |
| 3813 | if (srelgot == NULL |
| 3814 | && (h != NULL || info->shared)) |
| 3815 | { |
| 3816 | srelgot = htab->root.srelgot; |
| 3817 | BFD_ASSERT (srelgot != NULL); |
| 3818 | } |
| 3819 | |
| 3820 | if (h != NULL) |
| 3821 | { |
| 3822 | struct elf32_nios2_link_hash_entry *eh |
| 3823 | = (struct elf32_nios2_link_hash_entry *)h; |
| 3824 | h->got.refcount++; |
| 3825 | old_tls_type = elf32_nios2_hash_entry(h)->tls_type; |
| 3826 | if (r_type == R_NIOS2_CALL16 |
| 3827 | || r_type == R_NIOS2_CALL_LO |
| 3828 | || r_type == R_NIOS2_CALL_HA) |
| 3829 | { |
| 3830 | /* Make sure a plt entry is created for this symbol if |
| 3831 | it turns out to be a function defined by a dynamic |
| 3832 | object. */ |
| 3833 | h->plt.refcount++; |
| 3834 | h->needs_plt = 1; |
| 3835 | h->type = STT_FUNC; |
| 3836 | eh->got_types_used |= CALL_USED; |
| 3837 | } |
| 3838 | else |
| 3839 | eh->got_types_used |= GOT_USED; |
| 3840 | } |
| 3841 | else |
| 3842 | { |
| 3843 | /* This is a global offset table entry for a local symbol. */ |
| 3844 | if (local_got_refcounts == NULL) |
| 3845 | { |
| 3846 | bfd_size_type size; |
| 3847 | |
| 3848 | size = symtab_hdr->sh_info; |
| 3849 | size *= (sizeof (bfd_signed_vma) + sizeof (char)); |
| 3850 | local_got_refcounts |
| 3851 | = ((bfd_signed_vma *) bfd_zalloc (abfd, size)); |
| 3852 | if (local_got_refcounts == NULL) |
| 3853 | return FALSE; |
| 3854 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 3855 | elf32_nios2_local_got_tls_type (abfd) |
| 3856 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); |
| 3857 | } |
| 3858 | local_got_refcounts[r_symndx]++; |
| 3859 | old_tls_type = elf32_nios2_local_got_tls_type (abfd) [r_symndx]; |
| 3860 | } |
| 3861 | |
| 3862 | /* We will already have issued an error message if there is a |
| 3863 | TLS / non-TLS mismatch, based on the symbol type. We don't |
| 3864 | support any linker relaxations. So just combine any TLS |
| 3865 | types needed. */ |
| 3866 | if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL |
| 3867 | && tls_type != GOT_NORMAL) |
| 3868 | tls_type |= old_tls_type; |
| 3869 | |
| 3870 | if (old_tls_type != tls_type) |
| 3871 | { |
| 3872 | if (h != NULL) |
| 3873 | elf32_nios2_hash_entry (h)->tls_type = tls_type; |
| 3874 | else |
| 3875 | elf32_nios2_local_got_tls_type (abfd) [r_symndx] = tls_type; |
| 3876 | } |
| 3877 | } |
| 3878 | /* Fall through */ |
| 3879 | case R_NIOS2_TLS_LDM16: |
| 3880 | if (r_type == R_NIOS2_TLS_LDM16) |
| 3881 | htab->tls_ldm_got.refcount++; |
| 3882 | |
| 3883 | if (htab->root.sgot == NULL) |
| 3884 | { |
| 3885 | if (htab->root.dynobj == NULL) |
| 3886 | htab->root.dynobj = abfd; |
| 3887 | if (!create_got_section (htab->root.dynobj, info)) |
| 3888 | return FALSE; |
| 3889 | } |
| 3890 | break; |
| 3891 | |
| 3892 | /* This relocation describes the C++ object vtable hierarchy. |
| 3893 | Reconstruct it for later use during GC. */ |
| 3894 | case R_NIOS2_GNU_VTINHERIT: |
| 3895 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 3896 | return FALSE; |
| 3897 | break; |
| 3898 | |
| 3899 | /* This relocation describes which C++ vtable entries are actually |
| 3900 | used. Record for later use during GC. */ |
| 3901 | case R_NIOS2_GNU_VTENTRY: |
| 3902 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 3903 | return FALSE; |
| 3904 | break; |
| 3905 | |
| 3906 | case R_NIOS2_BFD_RELOC_32: |
| 3907 | case R_NIOS2_CALL26: |
| 3908 | case R_NIOS2_CALL26_NOAT: |
| 3909 | case R_NIOS2_HIADJ16: |
| 3910 | case R_NIOS2_LO16: |
| 3911 | |
| 3912 | if (h != NULL) |
| 3913 | { |
| 3914 | /* If this reloc is in a read-only section, we might |
| 3915 | need a copy reloc. We can't check reliably at this |
| 3916 | stage whether the section is read-only, as input |
| 3917 | sections have not yet been mapped to output sections. |
| 3918 | Tentatively set the flag for now, and correct in |
| 3919 | adjust_dynamic_symbol. */ |
| 3920 | if (!info->shared) |
| 3921 | h->non_got_ref = 1; |
| 3922 | |
| 3923 | /* Make sure a plt entry is created for this symbol if it |
| 3924 | turns out to be a function defined by a dynamic object. */ |
| 3925 | h->plt.refcount++; |
| 3926 | |
| 3927 | if (r_type == R_NIOS2_CALL26 || r_type == R_NIOS2_CALL26_NOAT) |
| 3928 | h->needs_plt = 1; |
| 3929 | } |
| 3930 | |
| 3931 | /* If we are creating a shared library, we need to copy the |
| 3932 | reloc into the shared library. */ |
| 3933 | if (info->shared |
| 3934 | && (sec->flags & SEC_ALLOC) != 0 |
| 3935 | && (r_type == R_NIOS2_BFD_RELOC_32 |
| 3936 | || (h != NULL && ! h->needs_plt |
| 3937 | && (! info->symbolic || ! h->def_regular)))) |
| 3938 | { |
| 3939 | struct elf32_nios2_dyn_relocs *p; |
| 3940 | struct elf32_nios2_dyn_relocs **head; |
| 3941 | |
| 3942 | /* When creating a shared object, we must copy these |
| 3943 | reloc types into the output file. We create a reloc |
| 3944 | section in dynobj and make room for this reloc. */ |
| 3945 | if (sreloc == NULL) |
| 3946 | { |
| 3947 | sreloc = _bfd_elf_make_dynamic_reloc_section |
| 3948 | (sec, dynobj, 2, abfd, TRUE); |
| 3949 | if (sreloc == NULL) |
| 3950 | return FALSE; |
| 3951 | } |
| 3952 | |
| 3953 | /* If this is a global symbol, we count the number of |
| 3954 | relocations we need for this symbol. */ |
| 3955 | if (h != NULL) |
| 3956 | head = &((struct elf32_nios2_link_hash_entry *) h)->dyn_relocs; |
| 3957 | else |
| 3958 | { |
| 3959 | /* Track dynamic relocs needed for local syms too. |
| 3960 | We really need local syms available to do this |
| 3961 | easily. Oh well. */ |
| 3962 | |
| 3963 | asection *s; |
| 3964 | void *vpp; |
| 3965 | Elf_Internal_Sym *isym; |
| 3966 | |
| 3967 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 3968 | abfd, r_symndx); |
| 3969 | if (isym == NULL) |
| 3970 | return FALSE; |
| 3971 | |
| 3972 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 3973 | if (s == NULL) |
| 3974 | s = sec; |
| 3975 | |
| 3976 | vpp = &elf_section_data (s)->local_dynrel; |
| 3977 | head = (struct elf32_nios2_dyn_relocs **) vpp; |
| 3978 | } |
| 3979 | |
| 3980 | p = *head; |
| 3981 | if (p == NULL || p->sec != sec) |
| 3982 | { |
| 3983 | bfd_size_type amt = sizeof *p; |
| 3984 | p = ((struct elf32_nios2_dyn_relocs *) |
| 3985 | bfd_alloc (htab->root.dynobj, amt)); |
| 3986 | if (p == NULL) |
| 3987 | return FALSE; |
| 3988 | p->next = *head; |
| 3989 | *head = p; |
| 3990 | p->sec = sec; |
| 3991 | p->count = 0; |
| 3992 | p->pc_count = 0; |
| 3993 | } |
| 3994 | |
| 3995 | p->count += 1; |
| 3996 | |
| 3997 | } |
| 3998 | break; |
| 3999 | } |
| 4000 | } |
| 4001 | |
| 4002 | return TRUE; |
| 4003 | } |
| 4004 | |
| 4005 | |
| 4006 | /* Implement elf_backend_gc_mark_hook: |
| 4007 | Return the section that should be marked against GC for a given |
| 4008 | relocation. */ |
| 4009 | static asection * |
| 4010 | nios2_elf32_gc_mark_hook (asection *sec, |
| 4011 | struct bfd_link_info *info, |
| 4012 | Elf_Internal_Rela *rel, |
| 4013 | struct elf_link_hash_entry *h, |
| 4014 | Elf_Internal_Sym *sym) |
| 4015 | { |
| 4016 | if (h != NULL) |
| 4017 | switch (ELF32_R_TYPE (rel->r_info)) |
| 4018 | { |
| 4019 | case R_NIOS2_GNU_VTINHERIT: |
| 4020 | case R_NIOS2_GNU_VTENTRY: |
| 4021 | return NULL; |
| 4022 | } |
| 4023 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 4024 | } |
| 4025 | |
| 4026 | /* Implement elf_backend_gc_sweep_hook: |
| 4027 | Update the got entry reference counts for the section being removed. */ |
| 4028 | static bfd_boolean |
| 4029 | nios2_elf32_gc_sweep_hook (bfd *abfd, |
| 4030 | struct bfd_link_info *info, |
| 4031 | asection *sec, |
| 4032 | const Elf_Internal_Rela *relocs) |
| 4033 | { |
| 4034 | Elf_Internal_Shdr *symtab_hdr; |
| 4035 | struct elf_link_hash_entry **sym_hashes; |
| 4036 | bfd_signed_vma *local_got_refcounts; |
| 4037 | const Elf_Internal_Rela *rel, *relend; |
| 4038 | bfd *dynobj; |
| 4039 | |
| 4040 | if (info->relocatable) |
| 4041 | return TRUE; |
| 4042 | |
| 4043 | elf_section_data (sec)->local_dynrel = NULL; |
| 4044 | |
| 4045 | dynobj = elf_hash_table (info)->dynobj; |
| 4046 | if (dynobj == NULL) |
| 4047 | return TRUE; |
| 4048 | |
| 4049 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 4050 | sym_hashes = elf_sym_hashes (abfd); |
| 4051 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 4052 | |
| 4053 | relend = relocs + sec->reloc_count; |
| 4054 | for (rel = relocs; rel < relend; rel++) |
| 4055 | { |
| 4056 | unsigned long r_symndx; |
| 4057 | struct elf_link_hash_entry *h = NULL; |
| 4058 | int r_type; |
| 4059 | |
| 4060 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 4061 | if (r_symndx >= symtab_hdr->sh_info) |
| 4062 | { |
| 4063 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 4064 | while (h->root.type == bfd_link_hash_indirect |
| 4065 | || h->root.type == bfd_link_hash_warning) |
| 4066 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 4067 | } |
| 4068 | |
| 4069 | r_type = ELF32_R_TYPE (rel->r_info); |
| 4070 | switch (r_type) |
| 4071 | { |
| 4072 | case R_NIOS2_GOT16: |
| 4073 | case R_NIOS2_GOT_LO: |
| 4074 | case R_NIOS2_GOT_HA: |
| 4075 | case R_NIOS2_CALL16: |
| 4076 | case R_NIOS2_CALL_LO: |
| 4077 | case R_NIOS2_CALL_HA: |
| 4078 | if (h != NULL) |
| 4079 | { |
| 4080 | if (h->got.refcount > 0) |
| 4081 | --h->got.refcount; |
| 4082 | } |
| 4083 | else if (local_got_refcounts != NULL) |
| 4084 | { |
| 4085 | if (local_got_refcounts[r_symndx] > 0) |
| 4086 | --local_got_refcounts[r_symndx]; |
| 4087 | } |
| 4088 | break; |
| 4089 | |
| 4090 | case R_NIOS2_PCREL_LO: |
| 4091 | case R_NIOS2_PCREL_HA: |
| 4092 | case R_NIOS2_BFD_RELOC_32: |
| 4093 | case R_NIOS2_CALL26: |
| 4094 | case R_NIOS2_CALL26_NOAT: |
| 4095 | if (h != NULL) |
| 4096 | { |
| 4097 | struct elf32_nios2_link_hash_entry *eh; |
| 4098 | struct elf32_nios2_dyn_relocs **pp; |
| 4099 | struct elf32_nios2_dyn_relocs *p; |
| 4100 | |
| 4101 | eh = (struct elf32_nios2_link_hash_entry *) h; |
| 4102 | |
| 4103 | if (h->plt.refcount > 0) |
| 4104 | --h->plt.refcount; |
| 4105 | |
| 4106 | if (r_type == R_NIOS2_PCREL_LO || r_type == R_NIOS2_PCREL_HA |
| 4107 | || r_type == R_NIOS2_BFD_RELOC_32) |
| 4108 | { |
| 4109 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; |
| 4110 | pp = &p->next) |
| 4111 | if (p->sec == sec) |
| 4112 | { |
| 4113 | p->count -= 1; |
| 4114 | if (p->count == 0) |
| 4115 | *pp = p->next; |
| 4116 | break; |
| 4117 | } |
| 4118 | } |
| 4119 | } |
| 4120 | break; |
| 4121 | |
| 4122 | default: |
| 4123 | break; |
| 4124 | } |
| 4125 | } |
| 4126 | |
| 4127 | return TRUE; |
| 4128 | } |
| 4129 | |
| 4130 | /* Implement elf_backend_finish_dynamic_symbols: |
| 4131 | Finish up dynamic symbol handling. We set the contents of various |
| 4132 | dynamic sections here. */ |
| 4133 | static bfd_boolean |
| 4134 | nios2_elf32_finish_dynamic_symbol (bfd *output_bfd, |
| 4135 | struct bfd_link_info *info, |
| 4136 | struct elf_link_hash_entry *h, |
| 4137 | Elf_Internal_Sym *sym) |
| 4138 | { |
| 4139 | struct elf32_nios2_link_hash_table *htab; |
| 4140 | struct elf32_nios2_link_hash_entry *eh |
| 4141 | = (struct elf32_nios2_link_hash_entry *)h; |
| 4142 | int use_plt; |
| 4143 | |
| 4144 | htab = elf32_nios2_hash_table (info); |
| 4145 | |
| 4146 | if (h->plt.offset != (bfd_vma) -1) |
| 4147 | { |
| 4148 | asection *splt; |
| 4149 | asection *sgotplt; |
| 4150 | asection *srela; |
| 4151 | bfd_vma plt_index; |
| 4152 | bfd_vma got_offset; |
| 4153 | Elf_Internal_Rela rela; |
| 4154 | bfd_byte *loc; |
| 4155 | bfd_vma got_address; |
| 4156 | |
| 4157 | /* This symbol has an entry in the procedure linkage table. Set |
| 4158 | it up. */ |
| 4159 | BFD_ASSERT (h->dynindx != -1); |
| 4160 | splt = htab->root.splt; |
| 4161 | sgotplt = htab->root.sgotplt; |
| 4162 | srela = htab->root.srelplt; |
| 4163 | BFD_ASSERT (splt != NULL && sgotplt != NULL && srela != NULL); |
| 4164 | |
| 4165 | /* Emit the PLT entry. */ |
| 4166 | if (info->shared) |
| 4167 | { |
| 4168 | nios2_elf32_install_data (splt, nios2_so_plt_entry, h->plt.offset, |
| 4169 | 3); |
| 4170 | plt_index = (h->plt.offset - 24) / 12; |
| 4171 | got_offset = (plt_index + 3) * 4; |
| 4172 | nios2_elf32_install_imm16 (splt, h->plt.offset, |
| 4173 | hiadj(plt_index * 4)); |
| 4174 | nios2_elf32_install_imm16 (splt, h->plt.offset + 4, |
| 4175 | (plt_index * 4) & 0xffff); |
| 4176 | nios2_elf32_install_imm16 (splt, h->plt.offset + 8, |
| 4177 | 0xfff4 - h->plt.offset); |
| 4178 | got_address = (sgotplt->output_section->vma + sgotplt->output_offset |
| 4179 | + got_offset); |
| 4180 | |
| 4181 | /* Fill in the entry in the global offset table. There are no |
| 4182 | res_n slots for a shared object PLT, instead the .got.plt entries |
| 4183 | point to the PLT entries. */ |
| 4184 | bfd_put_32 (output_bfd, |
| 4185 | splt->output_section->vma + splt->output_offset |
| 4186 | + h->plt.offset, sgotplt->contents + got_offset); |
| 4187 | } |
| 4188 | else |
| 4189 | { |
| 4190 | plt_index = (h->plt.offset - 28 - htab->res_n_size) / 12; |
| 4191 | got_offset = (plt_index + 3) * 4; |
| 4192 | |
| 4193 | nios2_elf32_install_data (splt, nios2_plt_entry, h->plt.offset, 3); |
| 4194 | got_address = (sgotplt->output_section->vma + sgotplt->output_offset |
| 4195 | + got_offset); |
| 4196 | nios2_elf32_install_imm16 (splt, h->plt.offset, hiadj(got_address)); |
| 4197 | nios2_elf32_install_imm16 (splt, h->plt.offset + 4, |
| 4198 | got_address & 0xffff); |
| 4199 | |
| 4200 | /* Fill in the entry in the global offset table. */ |
| 4201 | bfd_put_32 (output_bfd, |
| 4202 | splt->output_section->vma + splt->output_offset |
| 4203 | + plt_index * 4, sgotplt->contents + got_offset); |
| 4204 | } |
| 4205 | |
| 4206 | /* Fill in the entry in the .rela.plt section. */ |
| 4207 | rela.r_offset = got_address; |
| 4208 | rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_JUMP_SLOT); |
| 4209 | rela.r_addend = 0; |
| 4210 | loc = srela->contents + plt_index * sizeof (Elf32_External_Rela); |
| 4211 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 4212 | |
| 4213 | if (!h->def_regular) |
| 4214 | { |
| 4215 | /* Mark the symbol as undefined, rather than as defined in |
| 4216 | the .plt section. Leave the value alone. */ |
| 4217 | sym->st_shndx = SHN_UNDEF; |
| 4218 | /* If the symbol is weak, we do need to clear the value. |
| 4219 | Otherwise, the PLT entry would provide a definition for |
| 4220 | the symbol even if the symbol wasn't defined anywhere, |
| 4221 | and so the symbol would never be NULL. */ |
| 4222 | if (!h->ref_regular_nonweak) |
| 4223 | sym->st_value = 0; |
| 4224 | } |
| 4225 | } |
| 4226 | |
| 4227 | use_plt = (eh->got_types_used == CALL_USED |
| 4228 | && h->plt.offset != (bfd_vma) -1); |
| 4229 | |
| 4230 | if (!use_plt && h->got.offset != (bfd_vma) -1 |
| 4231 | && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_GD) == 0 |
| 4232 | && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_IE) == 0) |
| 4233 | { |
| 4234 | asection *sgot; |
| 4235 | asection *srela; |
| 4236 | Elf_Internal_Rela rela; |
| 4237 | bfd_byte *loc; |
| 4238 | bfd_vma offset; |
| 4239 | |
| 4240 | /* This symbol has an entry in the global offset table. Set it |
| 4241 | up. */ |
| 4242 | sgot = htab->root.sgot; |
| 4243 | srela = htab->root.srelgot; |
| 4244 | BFD_ASSERT (sgot != NULL && srela != NULL); |
| 4245 | |
| 4246 | offset = (h->got.offset & ~(bfd_vma) 1); |
| 4247 | rela.r_offset = (sgot->output_section->vma |
| 4248 | + sgot->output_offset + offset); |
| 4249 | |
| 4250 | /* If this is a -Bsymbolic link, and the symbol is defined |
| 4251 | locally, we just want to emit a RELATIVE reloc. Likewise if |
| 4252 | the symbol was forced to be local because of a version file. |
| 4253 | The entry in the global offset table will already have been |
| 4254 | initialized in the relocate_section function. */ |
| 4255 | |
| 4256 | if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 4257 | { |
| 4258 | rela.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE); |
| 4259 | rela.r_addend = bfd_get_signed_32 (output_bfd, |
| 4260 | (sgot->contents + offset)); |
| 4261 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset); |
| 4262 | } |
| 4263 | else |
| 4264 | { |
| 4265 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
| 4266 | sgot->contents + offset); |
| 4267 | rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_GLOB_DAT); |
| 4268 | rela.r_addend = 0; |
| 4269 | } |
| 4270 | |
| 4271 | loc = srela->contents; |
| 4272 | loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); |
| 4273 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 4274 | } |
| 4275 | |
| 4276 | if (use_plt && h->got.offset != (bfd_vma) -1) |
| 4277 | { |
| 4278 | bfd_vma offset = (h->got.offset & ~(bfd_vma) 1); |
| 4279 | asection *sgot = htab->root.sgot; |
| 4280 | asection *splt = htab->root.splt; |
| 4281 | bfd_put_32 (output_bfd, (splt->output_section->vma + splt->output_offset |
| 4282 | + h->plt.offset), |
| 4283 | sgot->contents + offset); |
| 4284 | } |
| 4285 | |
| 4286 | if (h->needs_copy) |
| 4287 | { |
| 4288 | asection *s; |
| 4289 | Elf_Internal_Rela rela; |
| 4290 | bfd_byte *loc; |
| 4291 | |
| 4292 | /* This symbol needs a copy reloc. Set it up. */ |
| 4293 | BFD_ASSERT (h->dynindx != -1 |
| 4294 | && (h->root.type == bfd_link_hash_defined |
| 4295 | || h->root.type == bfd_link_hash_defweak)); |
| 4296 | |
| 4297 | s = htab->srelbss; |
| 4298 | BFD_ASSERT (s != NULL); |
| 4299 | |
| 4300 | rela.r_offset = (h->root.u.def.value |
| 4301 | + h->root.u.def.section->output_section->vma |
| 4302 | + h->root.u.def.section->output_offset); |
| 4303 | rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_COPY); |
| 4304 | rela.r_addend = 0; |
| 4305 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 4306 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 4307 | } |
| 4308 | |
| 4309 | /* Mark _DYNAMIC, _GLOBAL_OFFSET_TABLE_, and _gp_got as absolute. */ |
| 4310 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 4311 | || h == elf_hash_table (info)->hgot |
| 4312 | || h == elf32_nios2_hash_table (info)->h_gp_got) |
| 4313 | sym->st_shndx = SHN_ABS; |
| 4314 | |
| 4315 | return TRUE; |
| 4316 | } |
| 4317 | |
| 4318 | /* Implement elf_backend_finish_dynamic_sections. */ |
| 4319 | static bfd_boolean |
| 4320 | nios2_elf32_finish_dynamic_sections (bfd *output_bfd, |
| 4321 | struct bfd_link_info *info) |
| 4322 | { |
| 4323 | bfd *dynobj; |
| 4324 | asection *sgotplt; |
| 4325 | asection *sdyn; |
| 4326 | struct elf32_nios2_link_hash_table *htab; |
| 4327 | |
| 4328 | htab = elf32_nios2_hash_table (info); |
| 4329 | dynobj = elf_hash_table (info)->dynobj; |
| 4330 | sgotplt = htab->root.sgotplt; |
| 4331 | BFD_ASSERT (sgotplt != NULL); |
| 4332 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 4333 | |
| 4334 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4335 | { |
| 4336 | asection *splt; |
| 4337 | Elf32_External_Dyn *dyncon, *dynconend; |
| 4338 | |
| 4339 | splt = htab->root.splt; |
| 4340 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
| 4341 | |
| 4342 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 4343 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 4344 | for (; dyncon < dynconend; dyncon++) |
| 4345 | { |
| 4346 | Elf_Internal_Dyn dyn; |
| 4347 | asection *s; |
| 4348 | |
| 4349 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 4350 | |
| 4351 | switch (dyn.d_tag) |
| 4352 | { |
| 4353 | default: |
| 4354 | break; |
| 4355 | |
| 4356 | case DT_PLTGOT: |
| 4357 | s = htab->root.sgot; |
| 4358 | BFD_ASSERT (s != NULL); |
| 4359 | dyn.d_un.d_ptr = s->output_section->vma; |
| 4360 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4361 | break; |
| 4362 | |
| 4363 | case DT_JMPREL: |
| 4364 | s = htab->root.srelplt; |
| 4365 | BFD_ASSERT (s != NULL); |
| 4366 | dyn.d_un.d_ptr = s->output_section->vma; |
| 4367 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4368 | break; |
| 4369 | |
| 4370 | case DT_PLTRELSZ: |
| 4371 | s = htab->root.srelplt; |
| 4372 | BFD_ASSERT (s != NULL); |
| 4373 | dyn.d_un.d_val = s->size; |
| 4374 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4375 | break; |
| 4376 | |
| 4377 | case DT_RELASZ: |
| 4378 | /* The procedure linkage table relocs (DT_JMPREL) should |
| 4379 | not be included in the overall relocs (DT_RELA). |
| 4380 | Therefore, we override the DT_RELASZ entry here to |
| 4381 | make it not include the JMPREL relocs. Since the |
| 4382 | linker script arranges for .rela.plt to follow all |
| 4383 | other relocation sections, we don't have to worry |
| 4384 | about changing the DT_RELA entry. */ |
| 4385 | s = htab->root.srelplt; |
| 4386 | if (s != NULL) |
| 4387 | dyn.d_un.d_val -= s->size; |
| 4388 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4389 | break; |
| 4390 | |
| 4391 | case DT_NIOS2_GP: |
| 4392 | s = htab->root.sgot; |
| 4393 | BFD_ASSERT (s != NULL); |
| 4394 | dyn.d_un.d_ptr = s->output_section->vma + 0x7ff0; |
| 4395 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 4396 | break; |
| 4397 | } |
| 4398 | } |
| 4399 | |
| 4400 | /* Fill in the first entry in the procedure linkage table. */ |
| 4401 | if (splt->size > 0) |
| 4402 | { |
| 4403 | bfd_vma got_address = (sgotplt->output_section->vma |
| 4404 | + sgotplt->output_offset); |
| 4405 | if (info->shared) |
| 4406 | { |
| 4407 | bfd_vma corrected = got_address - (splt->output_section->vma |
| 4408 | + splt->output_offset + 4); |
| 4409 | nios2_elf32_install_data (splt, nios2_so_plt0_entry, 0, 6); |
| 4410 | nios2_elf32_install_imm16 (splt, 4, hiadj (corrected)); |
| 4411 | nios2_elf32_install_imm16 (splt, 12, (corrected & 0xffff) + 4); |
| 4412 | nios2_elf32_install_imm16 (splt, 16, (corrected & 0xffff) + 8); |
| 4413 | } |
| 4414 | else |
| 4415 | { |
| 4416 | /* Divide by 4 here, not 3 because we already corrected for the |
| 4417 | res_N branches. */ |
| 4418 | bfd_vma res_size = (splt->size - 28) / 4; |
| 4419 | bfd_vma res_start = (splt->output_section->vma |
| 4420 | + splt->output_offset); |
| 4421 | bfd_vma res_offset; |
| 4422 | |
| 4423 | for (res_offset = 0; res_offset < res_size; res_offset += 4) |
| 4424 | bfd_put_32 (output_bfd, |
| 4425 | 6 | ((res_size - (res_offset + 4)) << 6), |
| 4426 | splt->contents + res_offset); |
| 4427 | |
| 4428 | nios2_elf32_install_data (splt, nios2_plt0_entry, res_size, 7); |
| 4429 | nios2_elf32_install_imm16 (splt, res_size, hiadj (res_start)); |
| 4430 | nios2_elf32_install_imm16 (splt, res_size + 4, |
| 4431 | res_start & 0xffff); |
| 4432 | nios2_elf32_install_imm16 (splt, res_size + 12, |
| 4433 | hiadj (got_address)); |
| 4434 | nios2_elf32_install_imm16 (splt, res_size + 16, |
| 4435 | (got_address & 0xffff) + 4); |
| 4436 | nios2_elf32_install_imm16 (splt, res_size + 20, |
| 4437 | (got_address & 0xffff) + 8); |
| 4438 | } |
| 4439 | } |
| 4440 | } |
| 4441 | /* Fill in the first three entries in the global offset table. */ |
| 4442 | if (sgotplt->size > 0) |
| 4443 | { |
| 4444 | if (sdyn == NULL) |
| 4445 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents); |
| 4446 | else |
| 4447 | bfd_put_32 (output_bfd, |
| 4448 | sdyn->output_section->vma + sdyn->output_offset, |
| 4449 | sgotplt->contents); |
| 4450 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 4); |
| 4451 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 8); |
| 4452 | } |
| 4453 | |
| 4454 | elf_section_data (sgotplt->output_section)->this_hdr.sh_entsize = 4; |
| 4455 | |
| 4456 | return TRUE; |
| 4457 | } |
| 4458 | |
| 4459 | /* Implement elf_backend_adjust_dynamic_symbol: |
| 4460 | Adjust a symbol defined by a dynamic object and referenced by a |
| 4461 | regular object. The current definition is in some section of the |
| 4462 | dynamic object, but we're not including those sections. We have to |
| 4463 | change the definition to something the rest of the link can |
| 4464 | understand. */ |
| 4465 | static bfd_boolean |
| 4466 | nios2_elf32_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 4467 | struct elf_link_hash_entry *h) |
| 4468 | { |
| 4469 | struct elf32_nios2_link_hash_table *htab; |
| 4470 | bfd *dynobj; |
| 4471 | asection *s; |
| 4472 | unsigned align2; |
| 4473 | |
| 4474 | htab = elf32_nios2_hash_table (info); |
| 4475 | dynobj = elf_hash_table (info)->dynobj; |
| 4476 | |
| 4477 | /* Make sure we know what is going on here. */ |
| 4478 | BFD_ASSERT (dynobj != NULL |
| 4479 | && (h->needs_plt |
| 4480 | || h->u.weakdef != NULL |
| 4481 | || (h->def_dynamic |
| 4482 | && h->ref_regular |
| 4483 | && !h->def_regular))); |
| 4484 | |
| 4485 | /* If this is a function, put it in the procedure linkage table. We |
| 4486 | will fill in the contents of the procedure linkage table later, |
| 4487 | when we know the address of the .got section. */ |
| 4488 | if (h->type == STT_FUNC || h->needs_plt) |
| 4489 | { |
| 4490 | if (h->plt.refcount <= 0 |
| 4491 | || SYMBOL_CALLS_LOCAL (info, h) |
| 4492 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 4493 | && h->root.type == bfd_link_hash_undefweak)) |
| 4494 | { |
| 4495 | /* This case can occur if we saw a PLT reloc in an input |
| 4496 | file, but the symbol was never referred to by a dynamic |
| 4497 | object, or if all references were garbage collected. In |
| 4498 | such a case, we don't actually need to build a procedure |
| 4499 | linkage table, and we can just do a PCREL reloc instead. */ |
| 4500 | h->plt.offset = (bfd_vma) -1; |
| 4501 | h->needs_plt = 0; |
| 4502 | } |
| 4503 | |
| 4504 | return TRUE; |
| 4505 | } |
| 4506 | |
| 4507 | /* Reinitialize the plt offset now that it is not used as a reference |
| 4508 | count any more. */ |
| 4509 | h->plt.offset = (bfd_vma) -1; |
| 4510 | |
| 4511 | /* If this is a weak symbol, and there is a real definition, the |
| 4512 | processor independent code will have arranged for us to see the |
| 4513 | real definition first, and we can just use the same value. */ |
| 4514 | if (h->u.weakdef != NULL) |
| 4515 | { |
| 4516 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 4517 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 4518 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 4519 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 4520 | return TRUE; |
| 4521 | } |
| 4522 | |
| 4523 | /* If there are no non-GOT references, we do not need a copy |
| 4524 | relocation. */ |
| 4525 | if (!h->non_got_ref) |
| 4526 | return TRUE; |
| 4527 | |
| 4528 | /* This is a reference to a symbol defined by a dynamic object which |
| 4529 | is not a function. |
| 4530 | If we are creating a shared library, we must presume that the |
| 4531 | only references to the symbol are via the global offset table. |
| 4532 | For such cases we need not do anything here; the relocations will |
| 4533 | be handled correctly by relocate_section. */ |
| 4534 | if (info->shared) |
| 4535 | return TRUE; |
| 4536 | |
| 4537 | if (h->size == 0) |
| 4538 | { |
| 4539 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), |
| 4540 | h->root.root.string); |
| 4541 | return TRUE; |
| 4542 | } |
| 4543 | |
| 4544 | /* We must allocate the symbol in our .dynbss section, which will |
| 4545 | become part of the .bss section of the executable. There will be |
| 4546 | an entry for this symbol in the .dynsym section. The dynamic |
| 4547 | object will contain position independent code, so all references |
| 4548 | from the dynamic object to this symbol will go through the global |
| 4549 | offset table. The dynamic linker will use the .dynsym entry to |
| 4550 | determine the address it must put in the global offset table, so |
| 4551 | both the dynamic object and the regular object will refer to the |
| 4552 | same memory location for the variable. */ |
| 4553 | s = htab->sdynbss; |
| 4554 | BFD_ASSERT (s != NULL); |
| 4555 | |
| 4556 | /* We must generate a R_NIOS2_COPY reloc to tell the dynamic linker to |
| 4557 | copy the initial value out of the dynamic object and into the |
| 4558 | runtime process image. We need to remember the offset into the |
| 4559 | .rela.bss section we are going to use. */ |
| 4560 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 4561 | { |
| 4562 | asection *srel; |
| 4563 | |
| 4564 | srel = htab->srelbss; |
| 4565 | BFD_ASSERT (srel != NULL); |
| 4566 | srel->size += sizeof (Elf32_External_Rela); |
| 4567 | h->needs_copy = 1; |
| 4568 | } |
| 4569 | |
| 4570 | align2 = bfd_log2 (h->size); |
| 4571 | if (align2 > h->root.u.def.section->alignment_power) |
| 4572 | align2 = h->root.u.def.section->alignment_power; |
| 4573 | |
| 4574 | /* Align dynbss. */ |
| 4575 | s->size = BFD_ALIGN (s->size, (bfd_size_type)1 << align2); |
| 4576 | if (align2 > bfd_get_section_alignment (dynobj, s) |
| 4577 | && !bfd_set_section_alignment (dynobj, s, align2)) |
| 4578 | return FALSE; |
| 4579 | |
| 4580 | /* Define the symbol as being at this point in the section. */ |
| 4581 | h->root.u.def.section = s; |
| 4582 | h->root.u.def.value = s->size; |
| 4583 | |
| 4584 | /* Increment the section size to make room for the symbol. */ |
| 4585 | s->size += h->size; |
| 4586 | |
| 4587 | return TRUE; |
| 4588 | } |
| 4589 | |
| 4590 | /* Worker function for nios2_elf32_size_dynamic_sections. */ |
| 4591 | static bfd_boolean |
| 4592 | adjust_dynrelocs (struct elf_link_hash_entry *h, PTR inf) |
| 4593 | { |
| 4594 | struct bfd_link_info *info; |
| 4595 | struct elf32_nios2_link_hash_table *htab; |
| 4596 | |
| 4597 | if (h->root.type == bfd_link_hash_indirect) |
| 4598 | return TRUE; |
| 4599 | |
| 4600 | if (h->root.type == bfd_link_hash_warning) |
| 4601 | /* When warning symbols are created, they **replace** the "real" |
| 4602 | entry in the hash table, thus we never get to see the real |
| 4603 | symbol in a hash traversal. So look at it now. */ |
| 4604 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 4605 | |
| 4606 | info = (struct bfd_link_info *) inf; |
| 4607 | htab = elf32_nios2_hash_table (info); |
| 4608 | |
| 4609 | if (h->plt.offset != (bfd_vma)-1) |
| 4610 | h->plt.offset += htab->res_n_size; |
| 4611 | if (htab->root.splt == h->root.u.def.section) |
| 4612 | h->root.u.def.value += htab->res_n_size; |
| 4613 | |
| 4614 | return TRUE; |
| 4615 | } |
| 4616 | |
| 4617 | /* Another worker function for nios2_elf32_size_dynamic_sections. |
| 4618 | Allocate space in .plt, .got and associated reloc sections for |
| 4619 | dynamic relocs. */ |
| 4620 | static bfd_boolean |
| 4621 | allocate_dynrelocs (struct elf_link_hash_entry *h, PTR inf) |
| 4622 | { |
| 4623 | struct bfd_link_info *info; |
| 4624 | struct elf32_nios2_link_hash_table *htab; |
| 4625 | struct elf32_nios2_link_hash_entry *eh; |
| 4626 | struct elf32_nios2_dyn_relocs *p; |
| 4627 | int use_plt; |
| 4628 | |
| 4629 | if (h->root.type == bfd_link_hash_indirect) |
| 4630 | return TRUE; |
| 4631 | |
| 4632 | if (h->root.type == bfd_link_hash_warning) |
| 4633 | /* When warning symbols are created, they **replace** the "real" |
| 4634 | entry in the hash table, thus we never get to see the real |
| 4635 | symbol in a hash traversal. So look at it now. */ |
| 4636 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 4637 | |
| 4638 | info = (struct bfd_link_info *) inf; |
| 4639 | htab = elf32_nios2_hash_table (info); |
| 4640 | |
| 4641 | if (htab->root.dynamic_sections_created |
| 4642 | && h->plt.refcount > 0) |
| 4643 | { |
| 4644 | /* Make sure this symbol is output as a dynamic symbol. |
| 4645 | Undefined weak syms won't yet be marked as dynamic. */ |
| 4646 | if (h->dynindx == -1 |
| 4647 | && !h->forced_local |
| 4648 | && !bfd_elf_link_record_dynamic_symbol (info, h)) |
| 4649 | return FALSE; |
| 4650 | |
| 4651 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h)) |
| 4652 | { |
| 4653 | asection *s = htab->root.splt; |
| 4654 | |
| 4655 | /* Allocate room for the header. */ |
| 4656 | if (s->size == 0) |
| 4657 | { |
| 4658 | if (info->shared) |
| 4659 | s->size = 24; |
| 4660 | else |
| 4661 | s->size = 28; |
| 4662 | } |
| 4663 | |
| 4664 | h->plt.offset = s->size; |
| 4665 | |
| 4666 | /* If this symbol is not defined in a regular file, and we are |
| 4667 | not generating a shared library, then set the symbol to this |
| 4668 | location in the .plt. This is required to make function |
| 4669 | pointers compare as equal between the normal executable and |
| 4670 | the shared library. */ |
| 4671 | if (! info->shared |
| 4672 | && !h->def_regular) |
| 4673 | { |
| 4674 | h->root.u.def.section = s; |
| 4675 | h->root.u.def.value = h->plt.offset; |
| 4676 | } |
| 4677 | |
| 4678 | /* Make room for this entry. */ |
| 4679 | s->size += 12; |
| 4680 | |
| 4681 | /* We also need to make an entry in the .rela.plt section. */ |
| 4682 | htab->root.srelplt->size += sizeof (Elf32_External_Rela); |
| 4683 | |
| 4684 | /* And the .got.plt section. */ |
| 4685 | htab->root.sgotplt->size += 4; |
| 4686 | } |
| 4687 | else |
| 4688 | { |
| 4689 | h->plt.offset = (bfd_vma) -1; |
| 4690 | h->needs_plt = 0; |
| 4691 | } |
| 4692 | } |
| 4693 | else |
| 4694 | { |
| 4695 | h->plt.offset = (bfd_vma) -1; |
| 4696 | h->needs_plt = 0; |
| 4697 | } |
| 4698 | |
| 4699 | eh = (struct elf32_nios2_link_hash_entry *) h; |
| 4700 | use_plt = (eh->got_types_used == CALL_USED |
| 4701 | && h->plt.offset != (bfd_vma) -1); |
| 4702 | |
| 4703 | if (h->got.refcount > 0) |
| 4704 | { |
| 4705 | asection *s; |
| 4706 | bfd_boolean dyn; |
| 4707 | int tls_type = eh->tls_type; |
| 4708 | int indx; |
| 4709 | |
| 4710 | /* Make sure this symbol is output as a dynamic symbol. |
| 4711 | Undefined weak syms won't yet be marked as dynamic. */ |
| 4712 | if (h->dynindx == -1 |
| 4713 | && !h->forced_local |
| 4714 | && !bfd_elf_link_record_dynamic_symbol (info, h)) |
| 4715 | return FALSE; |
| 4716 | |
| 4717 | s = htab->root.sgot; |
| 4718 | h->got.offset = s->size; |
| 4719 | |
| 4720 | if (tls_type == GOT_UNKNOWN) |
| 4721 | abort (); |
| 4722 | |
| 4723 | if (tls_type == GOT_NORMAL) |
| 4724 | /* Non-TLS symbols need one GOT slot. */ |
| 4725 | s->size += 4; |
| 4726 | else |
| 4727 | { |
| 4728 | if (tls_type & GOT_TLS_GD) |
| 4729 | /* R_NIOS2_TLS_GD16 needs 2 consecutive GOT slots. */ |
| 4730 | s->size += 8; |
| 4731 | if (tls_type & GOT_TLS_IE) |
| 4732 | /* R_NIOS2_TLS_IE16 needs one GOT slot. */ |
| 4733 | s->size += 4; |
| 4734 | } |
| 4735 | |
| 4736 | dyn = htab->root.dynamic_sections_created; |
| 4737 | |
| 4738 | indx = 0; |
| 4739 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 4740 | && (!info->shared |
| 4741 | || !SYMBOL_REFERENCES_LOCAL (info, h))) |
| 4742 | indx = h->dynindx; |
| 4743 | |
| 4744 | if (tls_type != GOT_NORMAL |
| 4745 | && (info->shared || indx != 0) |
| 4746 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 4747 | || h->root.type != bfd_link_hash_undefweak)) |
| 4748 | { |
| 4749 | if (tls_type & GOT_TLS_IE) |
| 4750 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); |
| 4751 | |
| 4752 | if (tls_type & GOT_TLS_GD) |
| 4753 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); |
| 4754 | |
| 4755 | if ((tls_type & GOT_TLS_GD) && indx != 0) |
| 4756 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); |
| 4757 | } |
| 4758 | else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 4759 | || h->root.type != bfd_link_hash_undefweak) |
| 4760 | && !use_plt |
| 4761 | && (info->shared |
| 4762 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
| 4763 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); |
| 4764 | } |
| 4765 | else |
| 4766 | h->got.offset = (bfd_vma) -1; |
| 4767 | |
| 4768 | if (eh->dyn_relocs == NULL) |
| 4769 | return TRUE; |
| 4770 | |
| 4771 | /* In the shared -Bsymbolic case, discard space allocated for |
| 4772 | dynamic pc-relative relocs against symbols which turn out to be |
| 4773 | defined in regular objects. For the normal shared case, discard |
| 4774 | space for pc-relative relocs that have become local due to symbol |
| 4775 | visibility changes. */ |
| 4776 | |
| 4777 | if (info->shared) |
| 4778 | { |
| 4779 | if (h->def_regular |
| 4780 | && (h->forced_local || info->symbolic)) |
| 4781 | { |
| 4782 | struct elf32_nios2_dyn_relocs **pp; |
| 4783 | |
| 4784 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| 4785 | { |
| 4786 | p->count -= p->pc_count; |
| 4787 | p->pc_count = 0; |
| 4788 | if (p->count == 0) |
| 4789 | *pp = p->next; |
| 4790 | else |
| 4791 | pp = &p->next; |
| 4792 | } |
| 4793 | } |
| 4794 | |
| 4795 | /* Also discard relocs on undefined weak syms with non-default |
| 4796 | visibility. */ |
| 4797 | if (eh->dyn_relocs != NULL |
| 4798 | && h->root.type == bfd_link_hash_undefweak) |
| 4799 | { |
| 4800 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 4801 | eh->dyn_relocs = NULL; |
| 4802 | |
| 4803 | /* Make sure undefined weak symbols are output as a dynamic |
| 4804 | symbol in PIEs. */ |
| 4805 | else if (h->dynindx == -1 |
| 4806 | && !h->forced_local |
| 4807 | && !bfd_elf_link_record_dynamic_symbol (info, h)) |
| 4808 | return FALSE; |
| 4809 | } |
| 4810 | } |
| 4811 | else |
| 4812 | { |
| 4813 | /* For the non-shared case, discard space for relocs against |
| 4814 | symbols which turn out to need copy relocs or are not |
| 4815 | dynamic. */ |
| 4816 | |
| 4817 | if (!h->non_got_ref |
| 4818 | && ((h->def_dynamic && !h->def_regular) |
| 4819 | || (htab->root.dynamic_sections_created |
| 4820 | && (h->root.type == bfd_link_hash_undefweak |
| 4821 | || h->root.type == bfd_link_hash_undefined)))) |
| 4822 | { |
| 4823 | /* Make sure this symbol is output as a dynamic symbol. |
| 4824 | Undefined weak syms won't yet be marked as dynamic. */ |
| 4825 | if (h->dynindx == -1 |
| 4826 | && !h->forced_local |
| 4827 | && !bfd_elf_link_record_dynamic_symbol (info, h)) |
| 4828 | return FALSE; |
| 4829 | |
| 4830 | /* If that succeeded, we know we'll be keeping all the |
| 4831 | relocs. */ |
| 4832 | if (h->dynindx != -1) |
| 4833 | goto keep; |
| 4834 | } |
| 4835 | |
| 4836 | eh->dyn_relocs = NULL; |
| 4837 | |
| 4838 | keep: ; |
| 4839 | } |
| 4840 | |
| 4841 | /* Finally, allocate space. */ |
| 4842 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 4843 | { |
| 4844 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
| 4845 | sreloc->size += p->count * sizeof (Elf32_External_Rela); |
| 4846 | } |
| 4847 | |
| 4848 | return TRUE; |
| 4849 | } |
| 4850 | |
| 4851 | /* Implement elf_backend_size_dynamic_sections: |
| 4852 | Set the sizes of the dynamic sections. */ |
| 4853 | static bfd_boolean |
| 4854 | nios2_elf32_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 4855 | struct bfd_link_info *info) |
| 4856 | { |
| 4857 | bfd *dynobj; |
| 4858 | asection *s; |
| 4859 | bfd_boolean plt; |
| 4860 | bfd_boolean got; |
| 4861 | bfd_boolean relocs; |
| 4862 | bfd *ibfd; |
| 4863 | struct elf32_nios2_link_hash_table *htab; |
| 4864 | |
| 4865 | htab = elf32_nios2_hash_table (info); |
| 4866 | dynobj = elf_hash_table (info)->dynobj; |
| 4867 | BFD_ASSERT (dynobj != NULL); |
| 4868 | |
| 4869 | htab->res_n_size = 0; |
| 4870 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4871 | { |
| 4872 | /* Set the contents of the .interp section to the interpreter. */ |
| 4873 | if (info->executable) |
| 4874 | { |
| 4875 | s = bfd_get_linker_section (dynobj, ".interp"); |
| 4876 | BFD_ASSERT (s != NULL); |
| 4877 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 4878 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 4879 | } |
| 4880 | } |
| 4881 | else |
| 4882 | { |
| 4883 | /* We may have created entries in the .rela.got section. |
| 4884 | However, if we are not creating the dynamic sections, we will |
| 4885 | not actually use these entries. Reset the size of .rela.got, |
| 4886 | which will cause it to get stripped from the output file |
| 4887 | below. */ |
| 4888 | s = htab->root.srelgot; |
| 4889 | if (s != NULL) |
| 4890 | s->size = 0; |
| 4891 | } |
| 4892 | |
| 4893 | /* Set up .got offsets for local syms, and space for local dynamic |
| 4894 | relocs. */ |
| 4895 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 4896 | { |
| 4897 | bfd_signed_vma *local_got; |
| 4898 | bfd_signed_vma *end_local_got; |
| 4899 | char *local_tls_type; |
| 4900 | bfd_size_type locsymcount; |
| 4901 | Elf_Internal_Shdr *symtab_hdr; |
| 4902 | asection *srel; |
| 4903 | |
| 4904 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
| 4905 | continue; |
| 4906 | |
| 4907 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 4908 | { |
| 4909 | struct elf32_nios2_dyn_relocs *p; |
| 4910 | |
| 4911 | for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) |
| 4912 | { |
| 4913 | if (!bfd_is_abs_section (p->sec) |
| 4914 | && bfd_is_abs_section (p->sec->output_section)) |
| 4915 | { |
| 4916 | /* Input section has been discarded, either because |
| 4917 | it is a copy of a linkonce section or due to |
| 4918 | linker script /DISCARD/, so we'll be discarding |
| 4919 | the relocs too. */ |
| 4920 | } |
| 4921 | else if (p->count != 0) |
| 4922 | { |
| 4923 | srel = elf_section_data (p->sec)->sreloc; |
| 4924 | srel->size += p->count * sizeof (Elf32_External_Rela); |
| 4925 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| 4926 | info->flags |= DF_TEXTREL; |
| 4927 | } |
| 4928 | } |
| 4929 | } |
| 4930 | |
| 4931 | local_got = elf_local_got_refcounts (ibfd); |
| 4932 | if (!local_got) |
| 4933 | continue; |
| 4934 | |
| 4935 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 4936 | locsymcount = symtab_hdr->sh_info; |
| 4937 | end_local_got = local_got + locsymcount; |
| 4938 | local_tls_type = elf32_nios2_local_got_tls_type (ibfd); |
| 4939 | s = htab->root.sgot; |
| 4940 | srel = htab->root.srelgot; |
| 4941 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
| 4942 | { |
| 4943 | if (*local_got > 0) |
| 4944 | { |
| 4945 | *local_got = s->size; |
| 4946 | if (*local_tls_type & GOT_TLS_GD) |
| 4947 | /* TLS_GD relocs need an 8-byte structure in the GOT. */ |
| 4948 | s->size += 8; |
| 4949 | if (*local_tls_type & GOT_TLS_IE) |
| 4950 | s->size += 4; |
| 4951 | if (*local_tls_type == GOT_NORMAL) |
| 4952 | s->size += 4; |
| 4953 | |
| 4954 | if (info->shared || *local_tls_type == GOT_TLS_GD) |
| 4955 | srel->size += sizeof (Elf32_External_Rela); |
| 4956 | } |
| 4957 | else |
| 4958 | *local_got = (bfd_vma) -1; |
| 4959 | } |
| 4960 | } |
| 4961 | |
| 4962 | if (htab->tls_ldm_got.refcount > 0) |
| 4963 | { |
| 4964 | /* Allocate two GOT entries and one dynamic relocation (if necessary) |
| 4965 | for R_NIOS2_TLS_LDM16 relocations. */ |
| 4966 | htab->tls_ldm_got.offset = htab->root.sgot->size; |
| 4967 | htab->root.sgot->size += 8; |
| 4968 | if (info->shared) |
| 4969 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); |
| 4970 | } |
| 4971 | else |
| 4972 | htab->tls_ldm_got.offset = -1; |
| 4973 | |
| 4974 | /* Allocate global sym .plt and .got entries, and space for global |
| 4975 | sym dynamic relocs. */ |
| 4976 | elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info); |
| 4977 | |
| 4978 | if (elf_hash_table (info)->dynamic_sections_created) |
| 4979 | { |
| 4980 | /* If the .got section is more than 0x8000 bytes, we add |
| 4981 | 0x8000 to the value of _gp_got, so that 16-bit relocations |
| 4982 | have a greater chance of working. */ |
| 4983 | if (htab->root.sgot->size >= 0x8000 |
| 4984 | && elf32_nios2_hash_table (info)->h_gp_got->root.u.def.value == 0) |
| 4985 | elf32_nios2_hash_table (info)->h_gp_got->root.u.def.value = 0x8000; |
| 4986 | } |
| 4987 | |
| 4988 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 4989 | determined the sizes of the various dynamic sections. Allocate |
| 4990 | memory for them. */ |
| 4991 | plt = FALSE; |
| 4992 | got = FALSE; |
| 4993 | relocs = FALSE; |
| 4994 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 4995 | { |
| 4996 | const char *name; |
| 4997 | |
| 4998 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 4999 | continue; |
| 5000 | |
| 5001 | /* It's OK to base decisions on the section name, because none |
| 5002 | of the dynobj section names depend upon the input files. */ |
| 5003 | name = bfd_get_section_name (dynobj, s); |
| 5004 | |
| 5005 | if (strcmp (name, ".plt") == 0) |
| 5006 | { |
| 5007 | /* Remember whether there is a PLT. */ |
| 5008 | plt = s->size != 0; |
| 5009 | |
| 5010 | /* Correct for the number of res_N branches. */ |
| 5011 | if (plt && !info->shared) |
| 5012 | { |
| 5013 | htab->res_n_size = (s->size-28) / 3; |
| 5014 | s->size += htab->res_n_size; |
| 5015 | } |
| 5016 | } |
| 5017 | else if (CONST_STRNEQ (name, ".rela")) |
| 5018 | { |
| 5019 | if (s->size != 0) |
| 5020 | { |
| 5021 | relocs = TRUE; |
| 5022 | |
| 5023 | /* We use the reloc_count field as a counter if we need |
| 5024 | to copy relocs into the output file. */ |
| 5025 | s->reloc_count = 0; |
| 5026 | } |
| 5027 | } |
| 5028 | else if (CONST_STRNEQ (name, ".got")) |
| 5029 | got = s->size != 0; |
| 5030 | else if (strcmp (name, ".dynbss") != 0) |
| 5031 | /* It's not one of our sections, so don't allocate space. */ |
| 5032 | continue; |
| 5033 | |
| 5034 | if (s->size == 0) |
| 5035 | { |
| 5036 | /* If we don't need this section, strip it from the |
| 5037 | output file. This is mostly to handle .rela.bss and |
| 5038 | .rela.plt. We must create both sections in |
| 5039 | create_dynamic_sections, because they must be created |
| 5040 | before the linker maps input sections to output |
| 5041 | sections. The linker does that before |
| 5042 | adjust_dynamic_symbol is called, and it is that |
| 5043 | function which decides whether anything needs to go |
| 5044 | into these sections. */ |
| 5045 | s->flags |= SEC_EXCLUDE; |
| 5046 | continue; |
| 5047 | } |
| 5048 | |
| 5049 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 5050 | continue; |
| 5051 | |
| 5052 | /* Allocate memory for the section contents. */ |
| 5053 | /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. |
| 5054 | Unused entries should be reclaimed before the section's contents |
| 5055 | are written out, but at the moment this does not happen. Thus in |
| 5056 | order to prevent writing out garbage, we initialize the section's |
| 5057 | contents to zero. */ |
| 5058 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| 5059 | if (s->contents == NULL) |
| 5060 | return FALSE; |
| 5061 | } |
| 5062 | |
| 5063 | /* Adjust dynamic symbols that point to the plt to account for the |
| 5064 | now-known number of resN slots. */ |
| 5065 | if (htab->res_n_size) |
| 5066 | elf_link_hash_traverse (& htab->root, adjust_dynrelocs, info); |
| 5067 | |
| 5068 | if (elf_hash_table (info)->dynamic_sections_created) |
| 5069 | { |
| 5070 | /* Add some entries to the .dynamic section. We fill in the |
| 5071 | values later, in elf_nios2_finish_dynamic_sections, but we |
| 5072 | must add the entries now so that we get the correct size for |
| 5073 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 5074 | dynamic linker and used by the debugger. */ |
| 5075 | #define add_dynamic_entry(TAG, VAL) \ |
| 5076 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 5077 | |
| 5078 | if (!info->shared && !add_dynamic_entry (DT_DEBUG, 0)) |
| 5079 | return FALSE; |
| 5080 | |
| 5081 | if (got && !add_dynamic_entry (DT_PLTGOT, 0)) |
| 5082 | return FALSE; |
| 5083 | |
| 5084 | if (plt |
| 5085 | && (!add_dynamic_entry (DT_PLTRELSZ, 0) |
| 5086 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 5087 | || !add_dynamic_entry (DT_JMPREL, 0))) |
| 5088 | return FALSE; |
| 5089 | |
| 5090 | if (relocs |
| 5091 | && (!add_dynamic_entry (DT_RELA, 0) |
| 5092 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 5093 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))) |
| 5094 | return FALSE; |
| 5095 | |
| 5096 | if (!info->shared && !add_dynamic_entry (DT_NIOS2_GP, 0)) |
| 5097 | return FALSE; |
| 5098 | |
| 5099 | if ((info->flags & DF_TEXTREL) != 0 |
| 5100 | && !add_dynamic_entry (DT_TEXTREL, 0)) |
| 5101 | return FALSE; |
| 5102 | } |
| 5103 | #undef add_dynamic_entry |
| 5104 | |
| 5105 | return TRUE; |
| 5106 | } |
| 5107 | |
| 5108 | /* Free the derived linker hash table. */ |
| 5109 | static void |
| 5110 | nios2_elf32_link_hash_table_free (bfd *obfd) |
| 5111 | { |
| 5112 | struct elf32_nios2_link_hash_table *htab |
| 5113 | = (struct elf32_nios2_link_hash_table *) obfd->link.hash; |
| 5114 | |
| 5115 | bfd_hash_table_free (&htab->bstab); |
| 5116 | _bfd_elf_link_hash_table_free (obfd); |
| 5117 | } |
| 5118 | |
| 5119 | /* Implement bfd_elf32_bfd_link_hash_table_create. */ |
| 5120 | static struct bfd_link_hash_table * |
| 5121 | nios2_elf32_link_hash_table_create (bfd *abfd) |
| 5122 | { |
| 5123 | struct elf32_nios2_link_hash_table *ret; |
| 5124 | bfd_size_type amt = sizeof (struct elf32_nios2_link_hash_table); |
| 5125 | |
| 5126 | ret = bfd_zmalloc (amt); |
| 5127 | if (ret == NULL) |
| 5128 | return NULL; |
| 5129 | |
| 5130 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
| 5131 | link_hash_newfunc, |
| 5132 | sizeof (struct |
| 5133 | elf32_nios2_link_hash_entry), |
| 5134 | NIOS2_ELF_DATA)) |
| 5135 | { |
| 5136 | free (ret); |
| 5137 | return NULL; |
| 5138 | } |
| 5139 | |
| 5140 | /* Init the stub hash table too. */ |
| 5141 | if (!bfd_hash_table_init (&ret->bstab, stub_hash_newfunc, |
| 5142 | sizeof (struct elf32_nios2_stub_hash_entry))) |
| 5143 | { |
| 5144 | _bfd_elf_link_hash_table_free (abfd); |
| 5145 | return NULL; |
| 5146 | } |
| 5147 | ret->root.root.hash_table_free = nios2_elf32_link_hash_table_free; |
| 5148 | |
| 5149 | return &ret->root.root; |
| 5150 | } |
| 5151 | |
| 5152 | /* Implement elf_backend_reloc_type_class. */ |
| 5153 | static enum elf_reloc_type_class |
| 5154 | nios2_elf32_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 5155 | const asection *rel_sec ATTRIBUTE_UNUSED, |
| 5156 | const Elf_Internal_Rela *rela) |
| 5157 | { |
| 5158 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 5159 | { |
| 5160 | case R_NIOS2_RELATIVE: |
| 5161 | return reloc_class_relative; |
| 5162 | case R_NIOS2_JUMP_SLOT: |
| 5163 | return reloc_class_plt; |
| 5164 | case R_NIOS2_COPY: |
| 5165 | return reloc_class_copy; |
| 5166 | default: |
| 5167 | return reloc_class_normal; |
| 5168 | } |
| 5169 | } |
| 5170 | |
| 5171 | /* Return 1 if target is one of ours. */ |
| 5172 | static bfd_boolean |
| 5173 | is_nios2_elf_target (const struct bfd_target *targ) |
| 5174 | { |
| 5175 | return (targ == &nios2_elf32_le_vec |
| 5176 | || targ == &nios2_elf32_be_vec); |
| 5177 | } |
| 5178 | |
| 5179 | /* Implement elf_backend_add_symbol_hook. |
| 5180 | This hook is called by the linker when adding symbols from an object |
| 5181 | file. We use it to put .comm items in .sbss, and not .bss. */ |
| 5182 | static bfd_boolean |
| 5183 | nios2_elf_add_symbol_hook (bfd *abfd, |
| 5184 | struct bfd_link_info *info, |
| 5185 | Elf_Internal_Sym *sym, |
| 5186 | const char **namep ATTRIBUTE_UNUSED, |
| 5187 | flagword *flagsp ATTRIBUTE_UNUSED, |
| 5188 | asection **secp, |
| 5189 | bfd_vma *valp) |
| 5190 | { |
| 5191 | bfd *dynobj; |
| 5192 | |
| 5193 | if (sym->st_shndx == SHN_COMMON |
| 5194 | && !info->relocatable |
| 5195 | && sym->st_size <= elf_gp_size (abfd) |
| 5196 | && is_nios2_elf_target (info->output_bfd->xvec)) |
| 5197 | { |
| 5198 | /* Common symbols less than or equal to -G nn bytes are automatically |
| 5199 | put into .sbss. */ |
| 5200 | struct elf32_nios2_link_hash_table *htab; |
| 5201 | |
| 5202 | htab = elf32_nios2_hash_table (info); |
| 5203 | if (htab->sbss == NULL) |
| 5204 | { |
| 5205 | flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED; |
| 5206 | |
| 5207 | dynobj = elf_hash_table (info)->dynobj; |
| 5208 | if (!dynobj) |
| 5209 | dynobj = abfd; |
| 5210 | |
| 5211 | htab->sbss = bfd_make_section_anyway_with_flags (dynobj, ".sbss", |
| 5212 | flags); |
| 5213 | if (htab->sbss == NULL) |
| 5214 | return FALSE; |
| 5215 | } |
| 5216 | |
| 5217 | *secp = htab->sbss; |
| 5218 | *valp = sym->st_size; |
| 5219 | } |
| 5220 | |
| 5221 | return TRUE; |
| 5222 | } |
| 5223 | |
| 5224 | /* Implement elf_backend_can_make_relative_eh_frame: |
| 5225 | Decide whether to attempt to turn absptr or lsda encodings in |
| 5226 | shared libraries into pcrel within the given input section. */ |
| 5227 | static bfd_boolean |
| 5228 | nios2_elf32_can_make_relative_eh_frame (bfd *input_bfd ATTRIBUTE_UNUSED, |
| 5229 | struct bfd_link_info *info |
| 5230 | ATTRIBUTE_UNUSED, |
| 5231 | asection *eh_frame_section |
| 5232 | ATTRIBUTE_UNUSED) |
| 5233 | { |
| 5234 | /* We can't use PC-relative encodings in the .eh_frame section. */ |
| 5235 | return FALSE; |
| 5236 | } |
| 5237 | |
| 5238 | /* Implement elf_backend_special_sections. */ |
| 5239 | const struct bfd_elf_special_section elf32_nios2_special_sections[] = |
| 5240 | { |
| 5241 | { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, |
| 5242 | SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, |
| 5243 | { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, |
| 5244 | SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, |
| 5245 | { NULL, 0, 0, 0, 0 } |
| 5246 | }; |
| 5247 | |
| 5248 | #define ELF_ARCH bfd_arch_nios2 |
| 5249 | #define ELF_TARGET_ID NIOS2_ELF_DATA |
| 5250 | #define ELF_MACHINE_CODE EM_ALTERA_NIOS2 |
| 5251 | |
| 5252 | /* The Nios II MMU uses a 4K page size. */ |
| 5253 | |
| 5254 | #define ELF_MAXPAGESIZE 0x1000 |
| 5255 | |
| 5256 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 5257 | nios2_elf32_link_hash_table_create |
| 5258 | |
| 5259 | /* Relocation table lookup macros. */ |
| 5260 | |
| 5261 | #define bfd_elf32_bfd_reloc_type_lookup nios2_elf32_bfd_reloc_type_lookup |
| 5262 | #define bfd_elf32_bfd_reloc_name_lookup nios2_elf32_bfd_reloc_name_lookup |
| 5263 | |
| 5264 | /* JUMP_TABLE_LINK macros. */ |
| 5265 | |
| 5266 | /* elf_info_to_howto (using RELA relocations). */ |
| 5267 | |
| 5268 | #define elf_info_to_howto nios2_elf32_info_to_howto |
| 5269 | |
| 5270 | /* elf backend functions. */ |
| 5271 | |
| 5272 | #define elf_backend_can_gc_sections 1 |
| 5273 | #define elf_backend_can_refcount 1 |
| 5274 | #define elf_backend_plt_readonly 1 |
| 5275 | #define elf_backend_want_got_plt 1 |
| 5276 | #define elf_backend_rela_normal 1 |
| 5277 | |
| 5278 | #define elf_backend_relocate_section nios2_elf32_relocate_section |
| 5279 | #define elf_backend_section_flags nios2_elf32_section_flags |
| 5280 | #define elf_backend_fake_sections nios2_elf32_fake_sections |
| 5281 | #define elf_backend_check_relocs nios2_elf32_check_relocs |
| 5282 | |
| 5283 | #define elf_backend_gc_mark_hook nios2_elf32_gc_mark_hook |
| 5284 | #define elf_backend_gc_sweep_hook nios2_elf32_gc_sweep_hook |
| 5285 | #define elf_backend_create_dynamic_sections \ |
| 5286 | nios2_elf32_create_dynamic_sections |
| 5287 | #define elf_backend_finish_dynamic_symbol nios2_elf32_finish_dynamic_symbol |
| 5288 | #define elf_backend_finish_dynamic_sections \ |
| 5289 | nios2_elf32_finish_dynamic_sections |
| 5290 | #define elf_backend_adjust_dynamic_symbol nios2_elf32_adjust_dynamic_symbol |
| 5291 | #define elf_backend_reloc_type_class nios2_elf32_reloc_type_class |
| 5292 | #define elf_backend_size_dynamic_sections nios2_elf32_size_dynamic_sections |
| 5293 | #define elf_backend_add_symbol_hook nios2_elf_add_symbol_hook |
| 5294 | #define elf_backend_copy_indirect_symbol nios2_elf32_copy_indirect_symbol |
| 5295 | |
| 5296 | #define elf_backend_grok_prstatus nios2_grok_prstatus |
| 5297 | #define elf_backend_grok_psinfo nios2_grok_psinfo |
| 5298 | |
| 5299 | #undef elf_backend_can_make_relative_eh_frame |
| 5300 | #define elf_backend_can_make_relative_eh_frame \ |
| 5301 | nios2_elf32_can_make_relative_eh_frame |
| 5302 | |
| 5303 | #define elf_backend_special_sections elf32_nios2_special_sections |
| 5304 | |
| 5305 | #define TARGET_LITTLE_SYM nios2_elf32_le_vec |
| 5306 | #define TARGET_LITTLE_NAME "elf32-littlenios2" |
| 5307 | #define TARGET_BIG_SYM nios2_elf32_be_vec |
| 5308 | #define TARGET_BIG_NAME "elf32-bignios2" |
| 5309 | |
| 5310 | #define elf_backend_got_header_size 12 |
| 5311 | #define elf_backend_default_execstack 0 |
| 5312 | |
| 5313 | #include "elf32-target.h" |