1 /* CRIS-specific support for 32-bit ELF. 2 Copyright (C) 2000-2014 Free Software Foundation, Inc. 3 Contributed by Axis Communications AB. 4 Written by Hans-Peter Nilsson, based on elf32-fr30.c 5 PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c. 6 7 This file is part of BFD, the Binary File Descriptor library. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 22 MA 02110-1301, USA. */ 23 24 #include "sysdep.h" 25 #include "bfd.h" 26 #include "libbfd.h" 27 #include "elf-bfd.h" 28 #include "elf/cris.h" 29 #include <limits.h> 30 31 bfd_reloc_status_type 32 cris_elf_pcrel_reloc (bfd *, arelent *, asymbol *, void *, 33 asection *, bfd *, char **); 34 static bfd_boolean 35 cris_elf_set_mach_from_flags (bfd *, unsigned long); 36 37 /* Forward declarations. */ 38 static reloc_howto_type cris_elf_howto_table [] = 39 { 40 /* This reloc does nothing. */ 41 HOWTO (R_CRIS_NONE, /* type */ 42 0, /* rightshift */ 43 2, /* size (0 = byte, 1 = short, 2 = long) */ 44 32, /* bitsize */ 45 FALSE, /* pc_relative */ 46 0, /* bitpos */ 47 complain_overflow_bitfield, /* complain_on_overflow */ 48 bfd_elf_generic_reloc, /* special_function */ 49 "R_CRIS_NONE", /* name */ 50 FALSE, /* partial_inplace */ 51 0, /* src_mask */ 52 0, /* dst_mask */ 53 FALSE), /* pcrel_offset */ 54 55 /* An 8 bit absolute relocation. */ 56 HOWTO (R_CRIS_8, /* type */ 57 0, /* rightshift */ 58 0, /* size (0 = byte, 1 = short, 2 = long) */ 59 8, /* bitsize */ 60 FALSE, /* pc_relative */ 61 0, /* bitpos */ 62 complain_overflow_bitfield, /* complain_on_overflow */ 63 bfd_elf_generic_reloc, /* special_function */ 64 "R_CRIS_8", /* name */ 65 FALSE, /* partial_inplace */ 66 0x0000, /* src_mask */ 67 0x00ff, /* dst_mask */ 68 FALSE), /* pcrel_offset */ 69 70 /* A 16 bit absolute relocation. */ 71 HOWTO (R_CRIS_16, /* type */ 72 0, /* rightshift */ 73 1, /* size (0 = byte, 1 = short, 2 = long) */ 74 16, /* bitsize */ 75 FALSE, /* pc_relative */ 76 0, /* bitpos */ 77 complain_overflow_bitfield, /* complain_on_overflow */ 78 bfd_elf_generic_reloc, /* special_function */ 79 "R_CRIS_16", /* name */ 80 FALSE, /* partial_inplace */ 81 0x00000000, /* src_mask */ 82 0x0000ffff, /* dst_mask */ 83 FALSE), /* pcrel_offset */ 84 85 /* A 32 bit absolute relocation. */ 86 HOWTO (R_CRIS_32, /* type */ 87 0, /* rightshift */ 88 2, /* size (0 = byte, 1 = short, 2 = long) */ 89 32, /* bitsize */ 90 FALSE, /* pc_relative */ 91 0, /* bitpos */ 92 /* We don't want overflow complaints for 64-bit vma builds 93 for e.g. sym+0x40000000 (or actually sym-0xc0000000 in 94 32-bit ELF) where sym=0xc0001234. 95 Don't do this for the PIC relocs, as we don't expect to 96 see them with large offsets. */ 97 complain_overflow_dont, /* complain_on_overflow */ 98 bfd_elf_generic_reloc, /* special_function */ 99 "R_CRIS_32", /* name */ 100 FALSE, /* partial_inplace */ 101 0x00000000, /* src_mask */ 102 0xffffffff, /* dst_mask */ 103 FALSE), /* pcrel_offset */ 104 105 /* An 8 bit PC-relative relocation. */ 106 HOWTO (R_CRIS_8_PCREL, /* type */ 107 0, /* rightshift */ 108 0, /* size (0 = byte, 1 = short, 2 = long) */ 109 8, /* bitsize */ 110 TRUE, /* pc_relative */ 111 0, /* bitpos */ 112 complain_overflow_bitfield, /* complain_on_overflow */ 113 cris_elf_pcrel_reloc, /* special_function */ 114 "R_CRIS_8_PCREL", /* name */ 115 FALSE, /* partial_inplace */ 116 0x0000, /* src_mask */ 117 0x00ff, /* dst_mask */ 118 TRUE), /* pcrel_offset */ 119 120 /* A 16 bit PC-relative relocation. */ 121 HOWTO (R_CRIS_16_PCREL, /* type */ 122 0, /* rightshift */ 123 1, /* size (0 = byte, 1 = short, 2 = long) */ 124 16, /* bitsize */ 125 TRUE, /* pc_relative */ 126 0, /* bitpos */ 127 complain_overflow_bitfield, /* complain_on_overflow */ 128 cris_elf_pcrel_reloc, /* special_function */ 129 "R_CRIS_16_PCREL", /* name */ 130 FALSE, /* partial_inplace */ 131 0x00000000, /* src_mask */ 132 0x0000ffff, /* dst_mask */ 133 TRUE), /* pcrel_offset */ 134 135 /* A 32 bit PC-relative relocation. */ 136 HOWTO (R_CRIS_32_PCREL, /* type */ 137 0, /* rightshift */ 138 2, /* size (0 = byte, 1 = short, 2 = long) */ 139 32, /* bitsize */ 140 TRUE, /* pc_relative */ 141 0, /* bitpos */ 142 complain_overflow_bitfield, /* complain_on_overflow */ 143 cris_elf_pcrel_reloc, /* special_function */ 144 "R_CRIS_32_PCREL", /* name */ 145 FALSE, /* partial_inplace */ 146 0x00000000, /* src_mask */ 147 0xffffffff, /* dst_mask */ 148 TRUE), /* pcrel_offset */ 149 150 /* GNU extension to record C++ vtable hierarchy. */ 151 HOWTO (R_CRIS_GNU_VTINHERIT, /* type */ 152 0, /* rightshift */ 153 2, /* size (0 = byte, 1 = short, 2 = long) */ 154 0, /* bitsize */ 155 FALSE, /* pc_relative */ 156 0, /* bitpos */ 157 complain_overflow_dont, /* complain_on_overflow */ 158 NULL, /* special_function */ 159 "R_CRIS_GNU_VTINHERIT", /* name */ 160 FALSE, /* partial_inplace */ 161 0, /* src_mask */ 162 0, /* dst_mask */ 163 FALSE), /* pcrel_offset */ 164 165 /* GNU extension to record C++ vtable member usage. */ 166 HOWTO (R_CRIS_GNU_VTENTRY, /* type */ 167 0, /* rightshift */ 168 2, /* size (0 = byte, 1 = short, 2 = long) */ 169 0, /* bitsize */ 170 FALSE, /* pc_relative */ 171 0, /* bitpos */ 172 complain_overflow_dont, /* complain_on_overflow */ 173 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 174 "R_CRIS_GNU_VTENTRY", /* name */ 175 FALSE, /* partial_inplace */ 176 0, /* src_mask */ 177 0, /* dst_mask */ 178 FALSE), /* pcrel_offset */ 179 180 /* This is used only by the dynamic linker. The symbol should exist 181 both in the object being run and in some shared library. The 182 dynamic linker copies the data addressed by the symbol from the 183 shared library into the object, because the object being 184 run has to have the data at some particular address. */ 185 HOWTO (R_CRIS_COPY, /* type */ 186 0, /* rightshift */ 187 2, /* size (0 = byte, 1 = short, 2 = long) */ 188 32, /* bitsize */ 189 FALSE, /* pc_relative */ 190 0, /* bitpos */ 191 complain_overflow_bitfield, /* complain_on_overflow */ 192 bfd_elf_generic_reloc, /* special_function */ 193 "R_CRIS_COPY", /* name */ 194 FALSE, /* partial_inplace */ 195 0, /* src_mask */ 196 0, /* dst_mask */ 197 FALSE), /* pcrel_offset */ 198 199 /* Like R_CRIS_32, but used when setting global offset table entries. */ 200 HOWTO (R_CRIS_GLOB_DAT, /* type */ 201 0, /* rightshift */ 202 2, /* size (0 = byte, 1 = short, 2 = long) */ 203 32, /* bitsize */ 204 FALSE, /* pc_relative */ 205 0, /* bitpos */ 206 complain_overflow_bitfield, /* complain_on_overflow */ 207 bfd_elf_generic_reloc, /* special_function */ 208 "R_CRIS_GLOB_DAT", /* name */ 209 FALSE, /* partial_inplace */ 210 0, /* src_mask */ 211 0xffffffff, /* dst_mask */ 212 FALSE), /* pcrel_offset */ 213 214 /* Marks a procedure linkage table entry for a symbol. */ 215 HOWTO (R_CRIS_JUMP_SLOT, /* type */ 216 0, /* rightshift */ 217 2, /* size (0 = byte, 1 = short, 2 = long) */ 218 32, /* bitsize */ 219 FALSE, /* pc_relative */ 220 0, /* bitpos */ 221 complain_overflow_bitfield, /* complain_on_overflow */ 222 bfd_elf_generic_reloc, /* special_function */ 223 "R_CRIS_JUMP_SLOT", /* name */ 224 FALSE, /* partial_inplace */ 225 0, /* src_mask */ 226 0, /* dst_mask */ 227 FALSE), /* pcrel_offset */ 228 229 /* Used only by the dynamic linker. When the object is run, this 230 longword is set to the load address of the object, plus the 231 addend. */ 232 HOWTO (R_CRIS_RELATIVE, /* type */ 233 0, /* rightshift */ 234 2, /* size (0 = byte, 1 = short, 2 = long) */ 235 32, /* bitsize */ 236 FALSE, /* pc_relative */ 237 0, /* bitpos */ 238 complain_overflow_bitfield, /* complain_on_overflow */ 239 bfd_elf_generic_reloc, /* special_function */ 240 "R_CRIS_RELATIVE", /* name */ 241 FALSE, /* partial_inplace */ 242 0, /* src_mask */ 243 0xffffffff, /* dst_mask */ 244 FALSE), /* pcrel_offset */ 245 246 /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */ 247 HOWTO (R_CRIS_16_GOT, /* type */ 248 0, /* rightshift */ 249 1, /* size (0 = byte, 1 = short, 2 = long) */ 250 16, /* bitsize */ 251 FALSE, /* pc_relative */ 252 0, /* bitpos */ 253 complain_overflow_bitfield, /* complain_on_overflow */ 254 bfd_elf_generic_reloc, /* special_function */ 255 "R_CRIS_16_GOT", /* name */ 256 FALSE, /* partial_inplace */ 257 0, /* src_mask */ 258 0xffff, /* dst_mask */ 259 FALSE), /* pcrel_offset */ 260 261 HOWTO (R_CRIS_32_GOT, /* type */ 262 0, /* rightshift */ 263 2, /* size (0 = byte, 1 = short, 2 = long) */ 264 32, /* bitsize */ 265 FALSE, /* pc_relative */ 266 0, /* bitpos */ 267 complain_overflow_bitfield, /* complain_on_overflow */ 268 bfd_elf_generic_reloc, /* special_function */ 269 "R_CRIS_32_GOT", /* name */ 270 FALSE, /* partial_inplace */ 271 0, /* src_mask */ 272 0xffffffff, /* dst_mask */ 273 FALSE), /* pcrel_offset */ 274 275 /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of 276 the GOT table for the symbol. */ 277 HOWTO (R_CRIS_16_GOTPLT, /* type */ 278 0, /* rightshift */ 279 1, /* size (0 = byte, 1 = short, 2 = long) */ 280 16, /* bitsize */ 281 FALSE, /* pc_relative */ 282 0, /* bitpos */ 283 complain_overflow_bitfield, /* complain_on_overflow */ 284 bfd_elf_generic_reloc, /* special_function */ 285 "R_CRIS_16_GOTPLT", /* name */ 286 FALSE, /* partial_inplace */ 287 0, /* src_mask */ 288 0xffff, /* dst_mask */ 289 FALSE), /* pcrel_offset */ 290 291 HOWTO (R_CRIS_32_GOTPLT, /* type */ 292 0, /* rightshift */ 293 2, /* size (0 = byte, 1 = short, 2 = long) */ 294 32, /* bitsize */ 295 FALSE, /* pc_relative */ 296 0, /* bitpos */ 297 complain_overflow_bitfield, /* complain_on_overflow */ 298 bfd_elf_generic_reloc, /* special_function */ 299 "R_CRIS_32_GOTPLT", /* name */ 300 FALSE, /* partial_inplace */ 301 0, /* src_mask */ 302 0xffffffff, /* dst_mask */ 303 FALSE), /* pcrel_offset */ 304 305 /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should 306 be necessary. */ 307 HOWTO (R_CRIS_32_GOTREL, /* type */ 308 0, /* rightshift */ 309 2, /* size (0 = byte, 1 = short, 2 = long) */ 310 32, /* bitsize */ 311 FALSE, /* pc_relative */ 312 0, /* bitpos */ 313 complain_overflow_bitfield, /* complain_on_overflow */ 314 bfd_elf_generic_reloc, /* special_function */ 315 "R_CRIS_32_GOTREL", /* name */ 316 FALSE, /* partial_inplace */ 317 0, /* src_mask */ 318 0xffffffff, /* dst_mask */ 319 FALSE), /* pcrel_offset */ 320 321 /* A 32-bit offset from GOT to entry for this symbol in PLT and request 322 to create PLT entry for symbol. */ 323 HOWTO (R_CRIS_32_PLT_GOTREL, /* type */ 324 0, /* rightshift */ 325 2, /* size (0 = byte, 1 = short, 2 = long) */ 326 32, /* bitsize */ 327 FALSE, /* pc_relative */ 328 0, /* bitpos */ 329 complain_overflow_bitfield, /* complain_on_overflow */ 330 bfd_elf_generic_reloc, /* special_function */ 331 "R_CRIS_32_PLT_GOTREL", /* name */ 332 FALSE, /* partial_inplace */ 333 0, /* src_mask */ 334 0xffffffff, /* dst_mask */ 335 FALSE), /* pcrel_offset */ 336 337 /* A 32-bit offset from PC (location after the relocation) + addend to 338 entry for this symbol in PLT and request to create PLT entry for 339 symbol. */ 340 HOWTO (R_CRIS_32_PLT_PCREL, /* type */ 341 0, /* rightshift */ 342 2, /* size (0 = byte, 1 = short, 2 = long) */ 343 32, /* bitsize */ 344 TRUE, /* pc_relative */ 345 0, /* bitpos */ 346 complain_overflow_bitfield, /* complain_on_overflow */ 347 cris_elf_pcrel_reloc, /* special_function */ 348 "R_CRIS_32_PLT_PCREL", /* name */ 349 FALSE, /* partial_inplace */ 350 0, /* src_mask */ 351 0xffffffff, /* dst_mask */ 352 TRUE), /* pcrel_offset */ 353 354 /* We don't handle these in any special manner and cross-format 355 linking is not supported; just recognize them enough to pass them 356 around. FIXME: do the same for most PIC relocs and add sanity 357 tests to actually refuse gracefully to handle these and PIC 358 relocs for cross-format linking. */ 359 #define TLSHOWTO32(name) \ 360 HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \ 361 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE) 362 #define TLSHOWTO16X(name, X) \ 363 HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \ 364 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE) 365 #define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned) 366 #define TLSHOWTO16S(name) TLSHOWTO16X(name, signed) 367 368 TLSHOWTO32 (R_CRIS_32_GOT_GD), 369 TLSHOWTO16 (R_CRIS_16_GOT_GD), 370 TLSHOWTO32 (R_CRIS_32_GD), 371 TLSHOWTO32 (R_CRIS_DTP), 372 TLSHOWTO32 (R_CRIS_32_DTPREL), 373 TLSHOWTO16S (R_CRIS_16_DTPREL), 374 TLSHOWTO32 (R_CRIS_32_GOT_TPREL), 375 TLSHOWTO16S (R_CRIS_16_GOT_TPREL), 376 TLSHOWTO32 (R_CRIS_32_TPREL), 377 TLSHOWTO16S (R_CRIS_16_TPREL), 378 TLSHOWTO32 (R_CRIS_DTPMOD), 379 TLSHOWTO32 (R_CRIS_32_IE) 380 }; 381 382 /* Map BFD reloc types to CRIS ELF reloc types. */ 384 385 struct cris_reloc_map 386 { 387 bfd_reloc_code_real_type bfd_reloc_val; 388 unsigned int cris_reloc_val; 389 }; 390 391 static const struct cris_reloc_map cris_reloc_map [] = 392 { 393 { BFD_RELOC_NONE, R_CRIS_NONE }, 394 { BFD_RELOC_8, R_CRIS_8 }, 395 { BFD_RELOC_16, R_CRIS_16 }, 396 { BFD_RELOC_32, R_CRIS_32 }, 397 { BFD_RELOC_8_PCREL, R_CRIS_8_PCREL }, 398 { BFD_RELOC_16_PCREL, R_CRIS_16_PCREL }, 399 { BFD_RELOC_32_PCREL, R_CRIS_32_PCREL }, 400 { BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT }, 401 { BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY }, 402 { BFD_RELOC_CRIS_COPY, R_CRIS_COPY }, 403 { BFD_RELOC_CRIS_GLOB_DAT, R_CRIS_GLOB_DAT }, 404 { BFD_RELOC_CRIS_JUMP_SLOT, R_CRIS_JUMP_SLOT }, 405 { BFD_RELOC_CRIS_RELATIVE, R_CRIS_RELATIVE }, 406 { BFD_RELOC_CRIS_16_GOT, R_CRIS_16_GOT }, 407 { BFD_RELOC_CRIS_32_GOT, R_CRIS_32_GOT }, 408 { BFD_RELOC_CRIS_16_GOTPLT, R_CRIS_16_GOTPLT }, 409 { BFD_RELOC_CRIS_32_GOTPLT, R_CRIS_32_GOTPLT }, 410 { BFD_RELOC_CRIS_32_GOTREL, R_CRIS_32_GOTREL }, 411 { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL }, 412 { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL }, 413 { BFD_RELOC_CRIS_32_GOT_GD, R_CRIS_32_GOT_GD }, 414 { BFD_RELOC_CRIS_16_GOT_GD, R_CRIS_16_GOT_GD }, 415 { BFD_RELOC_CRIS_32_GD, R_CRIS_32_GD }, 416 { BFD_RELOC_CRIS_DTP, R_CRIS_DTP }, 417 { BFD_RELOC_CRIS_32_DTPREL, R_CRIS_32_DTPREL }, 418 { BFD_RELOC_CRIS_16_DTPREL, R_CRIS_16_DTPREL }, 419 { BFD_RELOC_CRIS_32_GOT_TPREL, R_CRIS_32_GOT_TPREL }, 420 { BFD_RELOC_CRIS_16_GOT_TPREL, R_CRIS_16_GOT_TPREL }, 421 { BFD_RELOC_CRIS_32_TPREL, R_CRIS_32_TPREL }, 422 { BFD_RELOC_CRIS_16_TPREL, R_CRIS_16_TPREL }, 423 { BFD_RELOC_CRIS_DTPMOD, R_CRIS_DTPMOD }, 424 { BFD_RELOC_CRIS_32_IE, R_CRIS_32_IE } 425 }; 426 427 static reloc_howto_type * 428 cris_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, 429 bfd_reloc_code_real_type code) 430 { 431 unsigned int i; 432 433 for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++) 434 if (cris_reloc_map [i].bfd_reloc_val == code) 435 return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val]; 436 437 return NULL; 438 } 439 440 static reloc_howto_type * 441 cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) 442 { 443 unsigned int i; 444 445 for (i = 0; 446 i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]); 447 i++) 448 if (cris_elf_howto_table[i].name != NULL 449 && strcasecmp (cris_elf_howto_table[i].name, r_name) == 0) 450 return &cris_elf_howto_table[i]; 451 452 return NULL; 453 } 454 455 /* Set the howto pointer for an CRIS ELF reloc. */ 456 457 static void 458 cris_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED, 459 arelent * cache_ptr, 460 Elf_Internal_Rela * dst) 461 { 462 enum elf_cris_reloc_type r_type; 463 464 r_type = ELF32_R_TYPE (dst->r_info); 465 BFD_ASSERT (r_type < (unsigned int) R_CRIS_max); 466 cache_ptr->howto = & cris_elf_howto_table [r_type]; 467 } 468 469 bfd_reloc_status_type 470 cris_elf_pcrel_reloc (bfd *abfd ATTRIBUTE_UNUSED, 471 arelent *reloc_entry, 472 asymbol *symbol, 473 void * data ATTRIBUTE_UNUSED, 474 asection *input_section, 475 bfd *output_bfd, 476 char **error_message ATTRIBUTE_UNUSED) 477 { 478 /* By default (using only bfd_elf_generic_reloc when linking to 479 non-ELF formats) PC-relative relocs are relative to the beginning 480 of the reloc. CRIS PC-relative relocs are relative to the position 481 *after* the reloc because that's what pre-CRISv32 PC points to 482 after reading an insn field with that reloc. (For CRISv32, PC is 483 actually relative to the start of the insn, but we keep the old 484 definition.) Still, we use as much generic machinery as we can. 485 486 Only adjust when doing a final link. */ 487 if (output_bfd == (bfd *) NULL) 488 reloc_entry->addend -= 1 << reloc_entry->howto->size; 489 490 return 491 bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 492 input_section, output_bfd, error_message); 493 } 494 495 /* Support for core dump NOTE sections. 497 The slightly unintuitive code layout is an attempt to keep at least 498 some similarities with other ports, hoping to simplify general 499 changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */ 500 501 static bfd_boolean 502 cris_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 503 { 504 int offset; 505 size_t size; 506 507 if (bfd_get_mach (abfd) == bfd_mach_cris_v32) 508 switch (note->descsz) 509 { 510 default: 511 return FALSE; 512 513 case 202: /* Linux/CRISv32 */ 514 /* pr_cursig */ 515 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 516 517 /* pr_pid */ 518 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22); 519 520 /* pr_reg */ 521 offset = 70; 522 size = 128; 523 524 break; 525 } 526 else 527 switch (note->descsz) 528 { 529 default: 530 return FALSE; 531 532 case 214: /* Linux/CRIS */ 533 /* pr_cursig */ 534 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 535 536 /* pr_pid */ 537 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22); 538 539 /* pr_reg */ 540 offset = 70; 541 size = 140; 542 543 break; 544 } 545 546 /* Make a ".reg/999" section. */ 547 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 548 size, note->descpos + offset); 549 } 550 551 static bfd_boolean 552 cris_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 553 { 554 if (bfd_get_mach (abfd) == bfd_mach_cris_v32) 555 switch (note->descsz) 556 { 557 default: 558 return FALSE; 559 560 case 124: /* Linux/CRISv32 elf_prpsinfo */ 561 elf_tdata (abfd)->core->program 562 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); 563 elf_tdata (abfd)->core->command 564 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); 565 } 566 else 567 switch (note->descsz) 568 { 569 default: 570 return FALSE; 571 572 case 124: /* Linux/CRIS elf_prpsinfo */ 573 elf_tdata (abfd)->core->program 574 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); 575 elf_tdata (abfd)->core->command 576 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); 577 } 578 579 /* Note that for some reason, a spurious space is tacked 580 onto the end of the args in some (at least one anyway) 581 implementations, so strip it off if it exists. */ 582 583 { 584 char *command = elf_tdata (abfd)->core->command; 585 int n = strlen (command); 586 587 if (0 < n && command[n - 1] == ' ') 588 command[n - 1] = '\0'; 589 } 590 591 return TRUE; 592 } 593 594 /* The name of the dynamic interpreter. This is put in the .interp 596 section. */ 597 598 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" 599 600 /* The size in bytes of an entry in the procedure linkage table. */ 601 602 #define PLT_ENTRY_SIZE 20 603 #define PLT_ENTRY_SIZE_V32 26 604 605 /* The first entry in an absolute procedure linkage table looks like this. */ 606 607 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] = 608 { 609 0xfc, 0xe1, 610 0x7e, 0x7e, /* push mof. */ 611 0x7f, 0x0d, /* (dip [pc+]) */ 612 0, 0, 0, 0, /* Replaced with address of .got + 4. */ 613 0x30, 0x7a, /* move [...],mof */ 614 0x7f, 0x0d, /* (dip [pc+]) */ 615 0, 0, 0, 0, /* Replaced with address of .got + 8. */ 616 0x30, 0x09 /* jump [...] */ 617 }; 618 619 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] = 620 { 621 0x84, 0xe2, /* subq 4,$sp */ 622 0x6f, 0xfe, /* move.d 0,$acr */ 623 0, 0, 0, 0, /* Replaced by address of .got + 4. */ 624 0x7e, 0x7a, /* move $mof,[$sp] */ 625 0x3f, 0x7a, /* move [$acr],$mof */ 626 0x04, 0xf2, /* addq 4,acr */ 627 0x6f, 0xfa, /* move.d [$acr],$acr */ 628 0xbf, 0x09, /* jump $acr */ 629 0xb0, 0x05, /* nop */ 630 0, 0 /* Pad out to 26 bytes. */ 631 }; 632 633 /* Subsequent entries in an absolute procedure linkage table look like 634 this. */ 635 636 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] = 637 { 638 0x7f, 0x0d, /* (dip [pc+]) */ 639 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */ 640 0x30, 0x09, /* jump [...] */ 641 0x3f, 0x7e, /* move [pc+],mof */ 642 0, 0, 0, 0, /* Replaced with offset into relocation table. */ 643 0x2f, 0xfe, /* add.d [pc+],pc */ 644 0xec, 0xff, 645 0xff, 0xff /* Replaced with offset to start of .plt. */ 646 }; 647 648 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] = 649 { 650 0x6f, 0xfe, /* move.d 0,$acr */ 651 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */ 652 0x6f, 0xfa, /* move.d [$acr],$acr */ 653 0xbf, 0x09, /* jump $acr */ 654 0xb0, 0x05, /* nop */ 655 0x3f, 0x7e, /* move 0,mof */ 656 0, 0, 0, 0, /* Replaced with offset into relocation table. */ 657 0xbf, 0x0e, /* ba start_of_plt0_entry */ 658 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */ 659 0xb0, 0x05 /* nop */ 660 }; 661 662 /* The first entry in a PIC procedure linkage table looks like this. */ 663 664 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] = 665 { 666 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */ 667 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */ 668 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */ 669 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */ 670 }; 671 672 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] = 673 { 674 0x84, 0xe2, /* subq 4,$sp */ 675 0x04, 0x01, /* addoq 4,$r0,$acr */ 676 0x7e, 0x7a, /* move $mof,[$sp] */ 677 0x3f, 0x7a, /* move [$acr],$mof */ 678 0x04, 0xf2, /* addq 4,$acr */ 679 0x6f, 0xfa, /* move.d [$acr],$acr */ 680 0xbf, 0x09, /* jump $acr */ 681 0xb0, 0x05, /* nop */ 682 0, 0, /* Pad out to 26 bytes. */ 683 0, 0, 0, 0, 684 0, 0, 0, 0 685 }; 686 687 /* Subsequent entries in a PIC procedure linkage table look like this. */ 688 689 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] = 690 { 691 0x6f, 0x0d, /* (bdap [pc+].d,r0) */ 692 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */ 693 0x30, 0x09, /* jump [...] */ 694 0x3f, 0x7e, /* move [pc+],mof */ 695 0, 0, 0, 0, /* Replaced with offset into relocation table. */ 696 0x2f, 0xfe, /* add.d [pc+],pc */ 697 0xec, 0xff, /* Replaced with offset to start of .plt. */ 698 0xff, 0xff 699 }; 700 701 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] = 702 { 703 0x6f, 0x0d, /* addo.d 0,$r0,$acr */ 704 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */ 705 0x6f, 0xfa, /* move.d [$acr],$acr */ 706 0xbf, 0x09, /* jump $acr */ 707 0xb0, 0x05, /* nop */ 708 0x3f, 0x7e, /* move relocoffs,$mof */ 709 0, 0, 0, 0, /* Replaced with offset into relocation table. */ 710 0xbf, 0x0e, /* ba start_of_plt */ 711 0, 0, 0, 0, /* Replaced with offset to start of .plt. */ 712 0xb0, 0x05 /* nop */ 713 }; 714 715 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits 717 (and most other PIC/shlib stuff). Check that we don't drift away 718 without reason. 719 720 The CRIS linker, like the m68k and i386 linkers (and probably the rest 721 too) needs to keep track of the number of relocs that it decides to 722 copy in check_relocs for each symbol. This is so that it can discard 723 PC relative relocs if it doesn't need them when linking with 724 -Bsymbolic. We store the information in a field extending the regular 725 ELF linker hash table. */ 726 727 /* This structure keeps track of the number of PC relative relocs we have 728 copied for a given symbol. */ 729 730 struct elf_cris_pcrel_relocs_copied 731 { 732 /* Next section. */ 733 struct elf_cris_pcrel_relocs_copied *next; 734 735 /* A section in dynobj. */ 736 asection *section; 737 738 /* Number of relocs copied in this section. */ 739 bfd_size_type count; 740 741 /* Example of reloc being copied, for message. */ 742 enum elf_cris_reloc_type r_type; 743 }; 744 745 /* CRIS ELF linker hash entry. */ 746 747 struct elf_cris_link_hash_entry 748 { 749 struct elf_link_hash_entry root; 750 751 /* Number of PC relative relocs copied for this symbol. */ 752 struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied; 753 754 /* The GOTPLT references are CRIS-specific; the goal is to avoid having 755 both a general GOT and a PLT-specific GOT entry for the same symbol, 756 when it is referenced both as a function and as a function pointer. 757 758 Number of GOTPLT references for a function. */ 759 bfd_signed_vma gotplt_refcount; 760 761 /* Actual GOTPLT index for this symbol, if applicable, or zero if not 762 (zero is never used as an index). FIXME: We should be able to fold 763 this with gotplt_refcount in a union, like the got and plt unions in 764 elf_link_hash_entry. */ 765 bfd_size_type gotplt_offset; 766 767 /* The root.got.refcount is the sum of the regular reference counts 768 (this) and those members below. We have to keep a separate count 769 to track when we've found the first (or last) reference to a 770 regular got entry. The offset is in root.got.offset. */ 771 bfd_signed_vma reg_got_refcount; 772 773 /* Similar to the above, the number of reloc references to this 774 symbols that need a R_CRIS_32_TPREL slot. The offset is in 775 root.got.offset, because this and .dtp_refcount can't validly 776 happen when there's also a regular GOT entry; that's invalid 777 input for which an error is emitted. */ 778 bfd_signed_vma tprel_refcount; 779 780 /* Similar to the above, the number of reloc references to this 781 symbols that need a R_CRIS_DTP slot. The offset is in 782 root.got.offset; plus 4 if .tprel_refcount > 0. */ 783 bfd_signed_vma dtp_refcount; 784 }; 785 786 static bfd_boolean 787 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *, 788 void * ); 789 static bfd_boolean 790 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *, 791 void *); 792 793 /* The local_got_refcounts and local_got_offsets are a multiple of 794 LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the 795 refcount for GOT itself, see code), with the summary / group offset 796 for local symbols located at offset N, reference counts for 797 ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP 798 relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N + 799 3*LSNUM. */ 800 801 #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info) 802 #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info) 803 #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info) 804 #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4) 805 806 /* CRIS ELF linker hash table. */ 807 808 struct elf_cris_link_hash_table 809 { 810 struct elf_link_hash_table root; 811 812 /* We can't use the PLT offset and calculate to get the GOTPLT offset, 813 since we try and avoid creating GOTPLT:s when there's already a GOT. 814 Instead, we keep and update the next available index here. */ 815 bfd_size_type next_gotplt_entry; 816 817 /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have 818 been seen for any input; if != 0, then the constant-offset 819 R_CRIS_DTPMOD is needed for this DSO/executable. This turns 820 negative at relocation, so that we don't need an extra flag for 821 when the reloc is output. */ 822 bfd_signed_vma dtpmod_refcount; 823 }; 824 825 /* Traverse a CRIS ELF linker hash table. */ 826 827 #define elf_cris_link_hash_traverse(table, func, info) \ 828 (elf_link_hash_traverse \ 829 (&(table)->root, \ 830 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ 831 (info))) 832 833 /* Get the CRIS ELF linker hash table from a link_info structure. */ 834 835 #define elf_cris_hash_table(p) \ 836 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 837 == CRIS_ELF_DATA ? ((struct elf_cris_link_hash_table *) ((p)->hash)) : NULL) 838 839 /* Get the CRIS ELF linker hash entry from a regular hash entry (the 840 "parent class"). The .root reference is just a simple type 841 check on the argument. */ 842 843 #define elf_cris_hash_entry(p) \ 844 ((struct elf_cris_link_hash_entry *) (&(p)->root)) 845 846 /* Create an entry in a CRIS ELF linker hash table. */ 847 848 static struct bfd_hash_entry * 849 elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry, 850 struct bfd_hash_table *table, 851 const char *string) 852 { 853 struct elf_cris_link_hash_entry *ret = 854 (struct elf_cris_link_hash_entry *) entry; 855 856 /* Allocate the structure if it has not already been allocated by a 857 subclass. */ 858 if (ret == (struct elf_cris_link_hash_entry *) NULL) 859 ret = ((struct elf_cris_link_hash_entry *) 860 bfd_hash_allocate (table, 861 sizeof (struct elf_cris_link_hash_entry))); 862 if (ret == (struct elf_cris_link_hash_entry *) NULL) 863 return (struct bfd_hash_entry *) ret; 864 865 /* Call the allocation method of the superclass. */ 866 ret = ((struct elf_cris_link_hash_entry *) 867 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 868 table, string)); 869 if (ret != (struct elf_cris_link_hash_entry *) NULL) 870 { 871 ret->pcrel_relocs_copied = NULL; 872 ret->gotplt_refcount = 0; 873 ret->gotplt_offset = 0; 874 ret->dtp_refcount = 0; 875 ret->tprel_refcount = 0; 876 ret->reg_got_refcount = 0; 877 } 878 879 return (struct bfd_hash_entry *) ret; 880 } 881 882 /* Create a CRIS ELF linker hash table. */ 883 884 static struct bfd_link_hash_table * 885 elf_cris_link_hash_table_create (bfd *abfd) 886 { 887 struct elf_cris_link_hash_table *ret; 888 bfd_size_type amt = sizeof (struct elf_cris_link_hash_table); 889 890 ret = ((struct elf_cris_link_hash_table *) bfd_zmalloc (amt)); 891 if (ret == (struct elf_cris_link_hash_table *) NULL) 892 return NULL; 893 894 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, 895 elf_cris_link_hash_newfunc, 896 sizeof (struct elf_cris_link_hash_entry), 897 CRIS_ELF_DATA)) 898 { 899 free (ret); 900 return NULL; 901 } 902 903 /* Initialize to skip over the first three entries in the gotplt; they 904 are used for run-time symbol evaluation. */ 905 ret->next_gotplt_entry = 12; 906 907 return &ret->root.root; 908 } 909 910 /* Perform a single relocation. By default we use the standard BFD 912 routines, with a few tweaks. */ 913 914 static bfd_reloc_status_type 915 cris_final_link_relocate (reloc_howto_type * howto, 916 bfd * input_bfd, 917 asection * input_section, 918 bfd_byte * contents, 919 Elf_Internal_Rela * rel, 920 bfd_vma relocation) 921 { 922 bfd_reloc_status_type r; 923 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info); 924 925 /* PC-relative relocations are relative to the position *after* 926 the reloc. Note that for R_CRIS_8_PCREL the adjustment is 927 not a single byte, since PC must be 16-bit-aligned. */ 928 switch (r_type) 929 { 930 /* Check that the 16-bit GOT relocs are positive. */ 931 case R_CRIS_16_GOTPLT: 932 case R_CRIS_16_GOT: 933 if ((bfd_signed_vma) relocation < 0) 934 return bfd_reloc_overflow; 935 break; 936 937 case R_CRIS_32_PLT_PCREL: 938 case R_CRIS_32_PCREL: 939 relocation -= 2; 940 /* Fall through. */ 941 case R_CRIS_8_PCREL: 942 case R_CRIS_16_PCREL: 943 relocation -= 2; 944 break; 945 946 default: 947 break; 948 } 949 950 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 951 contents, rel->r_offset, 952 relocation, rel->r_addend); 953 return r; 954 } 955 956 958 /* The number of errors left before we stop outputting reloc-specific 959 explanatory messages. By coincidence, this works nicely together 960 with the default number of messages you'll get from LD about 961 "relocation truncated to fit" messages before you get an 962 "additional relocation overflows omitted from the output". */ 963 static int additional_relocation_error_msg_count = 10; 964 965 /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was 966 copied, for further comments. */ 967 968 static bfd_boolean 969 cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, 970 struct bfd_link_info *info, 971 bfd *input_bfd, 972 asection *input_section, 973 bfd_byte *contents, 974 Elf_Internal_Rela *relocs, 975 Elf_Internal_Sym *local_syms, 976 asection **local_sections) 977 { 978 struct elf_cris_link_hash_table * htab; 979 bfd *dynobj; 980 Elf_Internal_Shdr *symtab_hdr; 981 struct elf_link_hash_entry **sym_hashes; 982 bfd_vma *local_got_offsets; 983 asection *sgot; 984 asection *splt; 985 asection *sreloc; 986 Elf_Internal_Rela *rel; 987 Elf_Internal_Rela *relend; 988 asection *srelgot; 989 990 htab = elf_cris_hash_table (info); 991 if (htab == NULL) 992 return FALSE; 993 994 dynobj = elf_hash_table (info)->dynobj; 995 local_got_offsets = elf_local_got_offsets (input_bfd); 996 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; 997 sym_hashes = elf_sym_hashes (input_bfd); 998 relend = relocs + input_section->reloc_count; 999 1000 sgot = NULL; 1001 splt = NULL; 1002 sreloc = NULL; 1003 srelgot = NULL; 1004 1005 if (dynobj != NULL) 1006 { 1007 splt = bfd_get_linker_section (dynobj, ".plt"); 1008 sgot = bfd_get_linker_section (dynobj, ".got"); 1009 } 1010 1011 for (rel = relocs; rel < relend; rel ++) 1012 { 1013 reloc_howto_type *howto; 1014 unsigned long r_symndx; 1015 Elf_Internal_Sym *sym; 1016 asection *sec; 1017 struct elf_link_hash_entry *h; 1018 bfd_vma relocation; 1019 bfd_reloc_status_type r; 1020 const char *symname = NULL; 1021 enum elf_cris_reloc_type r_type; 1022 1023 r_type = ELF32_R_TYPE (rel->r_info); 1024 1025 if ( r_type == R_CRIS_GNU_VTINHERIT 1026 || r_type == R_CRIS_GNU_VTENTRY) 1027 continue; 1028 1029 r_symndx = ELF32_R_SYM (rel->r_info); 1030 howto = cris_elf_howto_table + r_type; 1031 h = NULL; 1032 sym = NULL; 1033 sec = NULL; 1034 1035 if (r_symndx < symtab_hdr->sh_info) 1036 { 1037 sym = local_syms + r_symndx; 1038 sec = local_sections [r_symndx]; 1039 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 1040 1041 symname = (bfd_elf_string_from_elf_section 1042 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 1043 if (symname == NULL) 1044 symname = bfd_section_name (input_bfd, sec); 1045 } 1046 else 1047 { 1048 bfd_boolean warned, ignored; 1049 bfd_boolean unresolved_reloc; 1050 1051 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 1052 r_symndx, symtab_hdr, sym_hashes, 1053 h, sec, relocation, 1054 unresolved_reloc, warned, ignored); 1055 1056 symname = h->root.root.string; 1057 1058 if (unresolved_reloc 1059 /* Perhaps we should detect the cases that 1060 sec->output_section is expected to be NULL like i386 and 1061 m68k, but apparently (and according to elfxx-ia64.c) all 1062 valid cases are where the symbol is defined in a shared 1063 object which we link dynamically against. This includes 1064 PLT relocs for which we've created a PLT entry and other 1065 relocs for which we're prepared to create dynamic 1066 relocations. 1067 1068 For now, new situations cause us to just err when 1069 sec->output_offset is NULL but the object with the symbol 1070 is *not* dynamically linked against. Thus this will 1071 automatically remind us so we can see if there are other 1072 valid cases we need to revisit. */ 1073 && (sec->owner->flags & DYNAMIC) != 0) 1074 relocation = 0; 1075 1076 else if (h->root.type == bfd_link_hash_defined 1077 || h->root.type == bfd_link_hash_defweak) 1078 { 1079 /* Here follow the cases where the relocation value must 1080 be zero (or when further handling is simplified when 1081 zero). I can't claim to understand the various 1082 conditions and they weren't described in the files 1083 where I copied them from (elf32-m68k.c and 1084 elf32-i386.c), but let's mention examples of where 1085 they happen. FIXME: Perhaps define and use a 1086 dynamic_symbol_p function like ia64. 1087 1088 - When creating a shared library, we can have an 1089 ordinary relocation for a symbol defined in a shared 1090 library (perhaps the one we create). We then make 1091 the relocation value zero, as the value seen now will 1092 be added into the relocation addend in this shared 1093 library, but must be handled only at dynamic-link 1094 time. FIXME: Not sure this example covers the 1095 h->elf_link_hash_flags test, though it's there in 1096 other targets. */ 1097 if (info->shared 1098 && ((! info->symbolic && h->dynindx != -1) 1099 || !h->def_regular) 1100 && (input_section->flags & SEC_ALLOC) != 0 1101 && (r_type == R_CRIS_8 1102 || r_type == R_CRIS_16 1103 || r_type == R_CRIS_32 1104 || r_type == R_CRIS_8_PCREL 1105 || r_type == R_CRIS_16_PCREL 1106 || r_type == R_CRIS_32_PCREL)) 1107 relocation = 0; 1108 else if (!info->relocatable && unresolved_reloc 1109 && (_bfd_elf_section_offset (output_bfd, info, 1110 input_section, 1111 rel->r_offset) 1112 != (bfd_vma) -1)) 1113 { 1114 _bfd_error_handler 1115 (_("%B, section %A: unresolvable relocation %s against symbol `%s'"), 1116 input_bfd, 1117 input_section, 1118 cris_elf_howto_table[r_type].name, 1119 symname); 1120 bfd_set_error (bfd_error_bad_value); 1121 return FALSE; 1122 } 1123 } 1124 } 1125 1126 if (sec != NULL && discarded_section (sec)) 1127 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 1128 rel, 1, relend, howto, 0, contents); 1129 1130 if (info->relocatable) 1131 continue; 1132 1133 switch (r_type) 1134 { 1135 case R_CRIS_16_GOTPLT: 1136 case R_CRIS_32_GOTPLT: 1137 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT, 1138 but we require a PLT, and the PLT handling will take care of 1139 filling in the PLT-specific GOT entry. For the GOT offset, 1140 calculate it as we do when filling it in for the .got.plt 1141 section. If we don't have a PLT, punt to GOT handling. */ 1142 if (h != NULL 1143 && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0) 1144 { 1145 asection *sgotplt 1146 = bfd_get_linker_section (dynobj, ".got.plt"); 1147 bfd_vma got_offset; 1148 1149 BFD_ASSERT (h->dynindx != -1); 1150 BFD_ASSERT (sgotplt != NULL); 1151 1152 got_offset 1153 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset; 1154 1155 relocation = got_offset; 1156 break; 1157 } 1158 1159 /* We didn't make a PLT entry for this symbol. Maybe everything is 1160 folded into the GOT. Other than folding, this happens when 1161 statically linking PIC code, or when using -Bsymbolic. Check 1162 that we instead have a GOT entry as done for us by 1163 elf_cris_adjust_dynamic_symbol, and drop through into the 1164 ordinary GOT cases. This must not happen for the 1165 executable, because any reference it does to a function 1166 that is satisfied by a DSO must generate a PLT. We assume 1167 these call-specific relocs don't address non-functions. */ 1168 if (h != NULL 1169 && (h->got.offset == (bfd_vma) -1 1170 || (!info->shared 1171 && !(h->def_regular 1172 || (!h->def_dynamic 1173 && h->root.type == bfd_link_hash_undefweak))))) 1174 { 1175 (*_bfd_error_handler) 1176 ((h->got.offset == (bfd_vma) -1) 1177 ? _("%B, section %A: No PLT nor GOT for relocation %s" 1178 " against symbol `%s'") 1179 : _("%B, section %A: No PLT for relocation %s" 1180 " against symbol `%s'"), 1181 input_bfd, 1182 input_section, 1183 cris_elf_howto_table[r_type].name, 1184 (symname != NULL && symname[0] != '\0' 1185 ? symname : _("[whose name is lost]"))); 1186 1187 /* FIXME: Perhaps blaming input is not the right thing to 1188 do; this is probably an internal error. But it is true 1189 that we didn't like that particular input. */ 1190 bfd_set_error (bfd_error_bad_value); 1191 return FALSE; 1192 } 1193 /* Fall through. */ 1194 1195 /* The size of the actual relocation is not used here; we only 1196 fill in the GOT table here. */ 1197 case R_CRIS_16_GOT: 1198 case R_CRIS_32_GOT: 1199 { 1200 bfd_vma off; 1201 1202 /* Note that despite using RELA relocations, the .got contents 1203 is always filled in with the link-relative relocation 1204 value; the addend. */ 1205 1206 if (h != NULL) 1207 { 1208 off = h->got.offset; 1209 BFD_ASSERT (off != (bfd_vma) -1); 1210 1211 if (!elf_hash_table (info)->dynamic_sections_created 1212 || (! info->shared 1213 && (h->def_regular 1214 || h->type == STT_FUNC 1215 || h->needs_plt)) 1216 || (info->shared 1217 && (info->symbolic || h->dynindx == -1) 1218 && h->def_regular)) 1219 { 1220 /* This wasn't checked above for ! info->shared, but 1221 must hold there if we get here; the symbol must 1222 be defined in the regular program or be undefweak 1223 or be a function or otherwise need a PLT. */ 1224 BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created 1225 || info->shared 1226 || h->def_regular 1227 || h->type == STT_FUNC 1228 || h->needs_plt 1229 || h->root.type == bfd_link_hash_undefweak); 1230 1231 /* This is actually a static link, or it is a 1232 -Bsymbolic link and the symbol is defined locally, 1233 or is undefweak, or the symbol was forced to be 1234 local because of a version file, or we're not 1235 creating a dynamic object. We must initialize this 1236 entry in the global offset table. Since the offset 1237 must always be a multiple of 4, we use the least 1238 significant bit to record whether we have 1239 initialized it already. 1240 1241 If this GOT entry should be runtime-initialized, we 1242 will create a .rela.got relocation entry to 1243 initialize the value. This is done in the 1244 finish_dynamic_symbol routine. */ 1245 if ((off & 1) != 0) 1246 off &= ~1; 1247 else 1248 { 1249 bfd_put_32 (output_bfd, relocation, 1250 sgot->contents + off); 1251 h->got.offset |= 1; 1252 } 1253 } 1254 } 1255 else 1256 { 1257 BFD_ASSERT (local_got_offsets != NULL 1258 && local_got_offsets[r_symndx] != (bfd_vma) -1); 1259 1260 off = local_got_offsets[r_symndx]; 1261 1262 /* The offset must always be a multiple of 4. We use 1263 the least significant bit to record whether we have 1264 already generated the necessary reloc. */ 1265 if ((off & 1) != 0) 1266 off &= ~1; 1267 else 1268 { 1269 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 1270 1271 if (info->shared) 1272 { 1273 Elf_Internal_Rela outrel; 1274 bfd_byte *loc; 1275 1276 if (srelgot == NULL) 1277 srelgot 1278 = bfd_get_linker_section (dynobj, ".rela.got"); 1279 BFD_ASSERT (srelgot != NULL); 1280 1281 outrel.r_offset = (sgot->output_section->vma 1282 + sgot->output_offset 1283 + off); 1284 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE); 1285 outrel.r_addend = relocation; 1286 loc = srelgot->contents; 1287 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 1288 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1289 } 1290 1291 local_got_offsets[r_symndx] |= 1; 1292 } 1293 } 1294 1295 relocation = sgot->output_offset + off; 1296 if (rel->r_addend != 0) 1297 { 1298 /* We can't do anything for a relocation which is against 1299 a symbol *plus offset*. GOT holds relocations for 1300 symbols. Make this an error; the compiler isn't 1301 allowed to pass us these kinds of things. */ 1302 if (h == NULL) 1303 (*_bfd_error_handler) 1304 (_("%B, section %A: relocation %s with non-zero addend %d" 1305 " against local symbol"), 1306 input_bfd, 1307 input_section, 1308 cris_elf_howto_table[r_type].name, 1309 rel->r_addend); 1310 else 1311 (*_bfd_error_handler) 1312 (_("%B, section %A: relocation %s with non-zero addend %d" 1313 " against symbol `%s'"), 1314 input_bfd, 1315 input_section, 1316 cris_elf_howto_table[r_type].name, 1317 rel->r_addend, 1318 symname[0] != '\0' ? symname : _("[whose name is lost]")); 1319 1320 bfd_set_error (bfd_error_bad_value); 1321 return FALSE; 1322 } 1323 } 1324 break; 1325 1326 case R_CRIS_32_GOTREL: 1327 /* This relocation must only be performed against local symbols. 1328 It's also ok when we link a program and the symbol is either 1329 defined in an ordinary (non-DSO) object or is undefined weak. */ 1330 if (h != NULL 1331 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1332 && !(!info->shared 1333 && (h->def_regular 1334 || (!h->def_dynamic 1335 && h->root.type == bfd_link_hash_undefweak)))) 1336 { 1337 (*_bfd_error_handler) 1338 (_("%B, section %A: relocation %s is" 1339 " not allowed for global symbol: `%s'"), 1340 input_bfd, 1341 input_section, 1342 cris_elf_howto_table[r_type].name, 1343 symname); 1344 bfd_set_error (bfd_error_bad_value); 1345 return FALSE; 1346 } 1347 1348 /* This can happen if we get a link error with the input ELF 1349 variant mismatching the output variant. Emit an error so 1350 it's noticed if it happens elsewhere. */ 1351 if (sgot == NULL) 1352 { 1353 (*_bfd_error_handler) 1354 (_("%B, section %A: relocation %s with no GOT created"), 1355 input_bfd, 1356 input_section, 1357 cris_elf_howto_table[r_type].name); 1358 bfd_set_error (bfd_error_bad_value); 1359 return FALSE; 1360 } 1361 1362 /* This relocation is like a PC-relative one, except the 1363 reference point is the location of GOT. Note that 1364 sgot->output_offset is not involved in this calculation. We 1365 always want the start of entire .got section, not the 1366 position after the reserved header. */ 1367 relocation -= sgot->output_section->vma; 1368 break; 1369 1370 case R_CRIS_32_PLT_PCREL: 1371 /* Relocation is to the entry for this symbol in the 1372 procedure linkage table. */ 1373 1374 /* Resolve a PLT_PCREL reloc against a local symbol directly, 1375 without using the procedure linkage table. */ 1376 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 1377 break; 1378 1379 if (h->plt.offset == (bfd_vma) -1 1380 || splt == NULL) 1381 { 1382 /* We didn't make a PLT entry for this symbol. This 1383 happens when statically linking PIC code, or when 1384 using -Bsymbolic. */ 1385 break; 1386 } 1387 1388 relocation = (splt->output_section->vma 1389 + splt->output_offset 1390 + h->plt.offset); 1391 break; 1392 1393 case R_CRIS_32_PLT_GOTREL: 1394 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the 1395 start of the .got section. See also comment at 1396 R_CRIS_32_GOT. */ 1397 relocation -= sgot->output_section->vma; 1398 1399 /* Resolve a PLT_GOTREL reloc against a local symbol directly, 1400 without using the procedure linkage table. */ 1401 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 1402 break; 1403 1404 if (h->plt.offset == (bfd_vma) -1 1405 || splt == NULL) 1406 { 1407 /* We didn't make a PLT entry for this symbol. This 1408 happens when statically linking PIC code, or when 1409 using -Bsymbolic. */ 1410 break; 1411 } 1412 1413 relocation = (splt->output_section->vma 1414 + splt->output_offset 1415 + h->plt.offset 1416 - sgot->output_section->vma); 1417 break; 1418 1419 case R_CRIS_8_PCREL: 1420 case R_CRIS_16_PCREL: 1421 case R_CRIS_32_PCREL: 1422 /* If the symbol was local, we need no shlib-specific handling. */ 1423 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 1424 || h->dynindx == -1) 1425 break; 1426 1427 /* Fall through. */ 1428 case R_CRIS_8: 1429 case R_CRIS_16: 1430 case R_CRIS_32: 1431 if (info->shared 1432 && r_symndx != STN_UNDEF 1433 && (input_section->flags & SEC_ALLOC) != 0 1434 && ((r_type != R_CRIS_8_PCREL 1435 && r_type != R_CRIS_16_PCREL 1436 && r_type != R_CRIS_32_PCREL) 1437 || (!info->symbolic 1438 || (h != NULL && !h->def_regular)))) 1439 { 1440 Elf_Internal_Rela outrel; 1441 bfd_byte *loc; 1442 bfd_boolean skip, relocate; 1443 1444 /* When generating a shared object, these relocations 1445 are copied into the output file to be resolved at run 1446 time. */ 1447 1448 if (sreloc == NULL) 1449 { 1450 sreloc = _bfd_elf_get_dynamic_reloc_section 1451 (dynobj, input_section, /*rela?*/ TRUE); 1452 /* The section should have been created in cris_elf_check_relocs, 1453 but that function will not be called for objects which fail in 1454 cris_elf_merge_private_bfd_data. */ 1455 if (sreloc == NULL) 1456 { 1457 bfd_set_error (bfd_error_bad_value); 1458 return FALSE; 1459 } 1460 } 1461 1462 skip = FALSE; 1463 relocate = FALSE; 1464 1465 outrel.r_offset = 1466 _bfd_elf_section_offset (output_bfd, info, input_section, 1467 rel->r_offset); 1468 if (outrel.r_offset == (bfd_vma) -1) 1469 skip = TRUE; 1470 else if (outrel.r_offset == (bfd_vma) -2 1471 /* For now, undefined weak symbols with non-default 1472 visibility (yielding 0), like exception info for 1473 discarded sections, will get a R_CRIS_NONE 1474 relocation rather than no relocation, because we 1475 notice too late that the symbol doesn't need a 1476 relocation. */ 1477 || (h != NULL 1478 && h->root.type == bfd_link_hash_undefweak 1479 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)) 1480 skip = TRUE, relocate = TRUE; 1481 outrel.r_offset += (input_section->output_section->vma 1482 + input_section->output_offset); 1483 1484 if (skip) 1485 memset (&outrel, 0, sizeof outrel); 1486 /* h->dynindx may be -1 if the symbol was marked to 1487 become local. */ 1488 else if (h != NULL 1489 && ((! info->symbolic && h->dynindx != -1) 1490 || !h->def_regular)) 1491 { 1492 BFD_ASSERT (h->dynindx != -1); 1493 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 1494 outrel.r_addend = relocation + rel->r_addend; 1495 } 1496 else 1497 { 1498 outrel.r_addend = relocation + rel->r_addend; 1499 1500 if (r_type == R_CRIS_32) 1501 { 1502 relocate = TRUE; 1503 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE); 1504 } 1505 else 1506 { 1507 long indx; 1508 1509 if (bfd_is_abs_section (sec)) 1510 indx = 0; 1511 else if (sec == NULL || sec->owner == NULL) 1512 { 1513 bfd_set_error (bfd_error_bad_value); 1514 return FALSE; 1515 } 1516 else 1517 { 1518 asection *osec; 1519 1520 /* We are turning this relocation into one 1521 against a section symbol. It would be 1522 proper to subtract the symbol's value, 1523 osec->vma, from the emitted reloc addend, 1524 but ld.so expects buggy relocs. */ 1525 osec = sec->output_section; 1526 indx = elf_section_data (osec)->dynindx; 1527 if (indx == 0) 1528 { 1529 osec = htab->root.text_index_section; 1530 indx = elf_section_data (osec)->dynindx; 1531 } 1532 BFD_ASSERT (indx != 0); 1533 } 1534 1535 outrel.r_info = ELF32_R_INFO (indx, r_type); 1536 } 1537 } 1538 1539 loc = sreloc->contents; 1540 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 1541 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1542 1543 /* This reloc will be computed at runtime, so there's no 1544 need to do anything now, except for R_CRIS_32 relocations 1545 that have been turned into R_CRIS_RELATIVE. */ 1546 if (!relocate) 1547 continue; 1548 } 1549 1550 break; 1551 1552 case R_CRIS_16_DTPREL: 1553 case R_CRIS_32_DTPREL: 1554 /* This relocation must only be performed against local 1555 symbols, or to sections that are not loadable. It's also 1556 ok when we link a program and the symbol is defined in an 1557 ordinary (non-DSO) object (if it's undefined there, we've 1558 already seen an error). */ 1559 if (h != NULL 1560 && (input_section->flags & SEC_ALLOC) != 0 1561 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1562 && (info->shared 1563 || (!h->def_regular 1564 && h->root.type != bfd_link_hash_undefined))) 1565 { 1566 (*_bfd_error_handler) 1567 ((h->root.type == bfd_link_hash_undefined) 1568 /* We shouldn't get here for GCC-emitted code. */ 1569 ? _("%B, section %A: relocation %s has an undefined" 1570 " reference to `%s', perhaps a declaration mixup?") 1571 : ("%B, section %A: relocation %s is" 1572 " not allowed for `%s', a global symbol with default" 1573 " visibility, perhaps a declaration mixup?"), 1574 input_bfd, 1575 input_section, 1576 cris_elf_howto_table[r_type].name, 1577 symname != NULL && symname[0] != '\0' 1578 ? symname : _("[whose name is lost]")); 1579 bfd_set_error (bfd_error_bad_value); 1580 return FALSE; 1581 } 1582 1583 BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0 1584 || htab->dtpmod_refcount != 0); 1585 1586 /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't 1587 already done so. Note that we do this in .got.plt, not 1588 in .got, as .got.plt contains the first part, still the 1589 reloc is against .got, because the linker script directs 1590 (is required to direct) them both into .got. */ 1591 if (htab->dtpmod_refcount > 0 1592 && (input_section->flags & SEC_ALLOC) != 0) 1593 { 1594 asection *sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); 1595 BFD_ASSERT (sgotplt != NULL); 1596 1597 if (info->shared) 1598 { 1599 Elf_Internal_Rela outrel; 1600 bfd_byte *loc; 1601 1602 if (srelgot == NULL) 1603 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 1604 BFD_ASSERT (srelgot != NULL); 1605 loc = srelgot->contents; 1606 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 1607 1608 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12); 1609 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16); 1610 outrel.r_offset = (sgotplt->output_section->vma 1611 + sgotplt->output_offset 1612 + 12); 1613 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD); 1614 outrel.r_addend = 0; 1615 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1616 } 1617 else 1618 { 1619 /* For an executable, the GOT entry contents is known. */ 1620 bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12); 1621 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16); 1622 } 1623 1624 /* Reverse the sign to mark that we've emitted the 1625 required GOT entry. */ 1626 htab->dtpmod_refcount = - htab->dtpmod_refcount; 1627 } 1628 1629 /* The relocation is the offset from the start of the module 1630 TLS block to the (local) symbol. */ 1631 relocation -= elf_hash_table (info)->tls_sec == NULL 1632 ? 0 : elf_hash_table (info)->tls_sec->vma; 1633 break; 1634 1635 case R_CRIS_32_GD: 1636 if (info->shared) 1637 { 1638 bfd_set_error (bfd_error_invalid_operation); 1639 1640 /* We've already informed in cris_elf_check_relocs that 1641 this is an error. */ 1642 return FALSE; 1643 } 1644 /* Fall through. */ 1645 1646 case R_CRIS_16_GOT_GD: 1647 case R_CRIS_32_GOT_GD: 1648 if (rel->r_addend != 0) 1649 { 1650 /* We can't do anything for a relocation which is against a 1651 symbol *plus offset*. The GOT holds relocations for 1652 symbols. Make this an error; the compiler isn't allowed 1653 to pass us these kinds of things. */ 1654 (*_bfd_error_handler) 1655 (_("%B, section %A: relocation %s with non-zero addend %d" 1656 " against symbol `%s'"), 1657 input_bfd, 1658 input_section, 1659 cris_elf_howto_table[r_type].name, 1660 rel->r_addend, 1661 symname[0] != '\0' ? symname : _("[whose name is lost]")); 1662 1663 bfd_set_error (bfd_error_bad_value); 1664 return FALSE; 1665 } 1666 1667 if (!info->shared 1668 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h))) 1669 { 1670 /* Known contents of the GOT. */ 1671 bfd_vma off; 1672 1673 /* The symbol is defined in the program, so just write 1674 (1, known_tpoffset) into the GOT. */ 1675 relocation -= elf_hash_table (info)->tls_sec->vma; 1676 1677 if (h != NULL) 1678 { 1679 off = elf_cris_hash_entry (h)->tprel_refcount > 0 1680 ? h->got.offset + 4 : h->got.offset; 1681 } 1682 else 1683 { 1684 off = local_got_offsets[r_symndx]; 1685 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)]) 1686 off += 4; 1687 } 1688 1689 /* We use bit 1 of the offset as a flag for GOT entry with 1690 the R_CRIS_DTP reloc, setting it when we've emitted the 1691 GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL 1692 relocs. */ 1693 if ((off & 2) == 0) 1694 { 1695 off &= ~3; 1696 1697 if (h != NULL) 1698 h->got.offset |= 2; 1699 else 1700 local_got_offsets[r_symndx] |= 2; 1701 1702 bfd_put_32 (output_bfd, 1, sgot->contents + off); 1703 bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4); 1704 } 1705 else 1706 off &= ~3; 1707 1708 relocation = sgot->output_offset + off 1709 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0); 1710 } 1711 else 1712 { 1713 /* Not all parts of the GOT entry are known; emit a real 1714 relocation. */ 1715 bfd_vma off; 1716 1717 if (h != NULL) 1718 off = elf_cris_hash_entry (h)->tprel_refcount > 0 1719 ? h->got.offset + 4 : h->got.offset; 1720 else 1721 { 1722 off = local_got_offsets[r_symndx]; 1723 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)]) 1724 off += 4; 1725 } 1726 1727 /* See above re bit 1 and bit 0 usage. */ 1728 if ((off & 2) == 0) 1729 { 1730 Elf_Internal_Rela outrel; 1731 bfd_byte *loc; 1732 1733 off &= ~3; 1734 1735 if (h != NULL) 1736 h->got.offset |= 2; 1737 else 1738 local_got_offsets[r_symndx] |= 2; 1739 1740 /* Clear the target contents of the GOT (just as a 1741 gesture; it's already cleared on allocation): this 1742 relocation is not like the other dynrelocs. */ 1743 bfd_put_32 (output_bfd, 0, sgot->contents + off); 1744 bfd_put_32 (output_bfd, 0, sgot->contents + off + 4); 1745 1746 if (srelgot == NULL) 1747 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 1748 BFD_ASSERT (srelgot != NULL); 1749 1750 if (h != NULL && h->dynindx != -1) 1751 { 1752 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP); 1753 relocation = 0; 1754 } 1755 else 1756 { 1757 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP); 1758 1759 /* NULL if we had an error. */ 1760 relocation -= elf_hash_table (info)->tls_sec == NULL 1761 ? 0 : elf_hash_table (info)->tls_sec->vma; 1762 } 1763 1764 outrel.r_offset = (sgot->output_section->vma 1765 + sgot->output_offset 1766 + off); 1767 outrel.r_addend = relocation; 1768 loc = srelgot->contents; 1769 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 1770 1771 /* NULL if we had an error. */ 1772 if (srelgot->contents != NULL) 1773 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1774 } 1775 else 1776 off &= ~3; 1777 1778 relocation = sgot->output_offset + off 1779 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0); 1780 } 1781 1782 /* The GOT-relative offset to the GOT entry is the 1783 relocation, or for R_CRIS_32_GD, the actual address of 1784 the GOT entry. */ 1785 break; 1786 1787 case R_CRIS_32_IE: 1788 if (info->shared) 1789 { 1790 bfd_set_error (bfd_error_invalid_operation); 1791 1792 /* We've already informed in cris_elf_check_relocs that 1793 this is an error. */ 1794 return FALSE; 1795 } 1796 /* Fall through. */ 1797 1798 case R_CRIS_32_GOT_TPREL: 1799 case R_CRIS_16_GOT_TPREL: 1800 if (rel->r_addend != 0) 1801 { 1802 /* We can't do anything for a relocation which is 1803 against a symbol *plus offset*. GOT holds 1804 relocations for symbols. Make this an error; the 1805 compiler isn't allowed to pass us these kinds of 1806 things. */ 1807 (*_bfd_error_handler) 1808 (_("%B, section %A: relocation %s with non-zero addend %d" 1809 " against symbol `%s'"), 1810 input_bfd, 1811 input_section, 1812 cris_elf_howto_table[r_type].name, 1813 rel->r_addend, 1814 symname[0] != '\0' ? symname : _("[whose name is lost]")); 1815 bfd_set_error (bfd_error_bad_value); 1816 return FALSE; 1817 } 1818 1819 if (!info->shared 1820 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h))) 1821 { 1822 /* Known contents of the GOT. */ 1823 bfd_vma off; 1824 1825 /* The symbol is defined in the program, so just write 1826 the -prog_tls_size+known_tpoffset into the GOT. */ 1827 relocation -= elf_hash_table (info)->tls_sec->vma; 1828 relocation -= elf_hash_table (info)->tls_size; 1829 1830 if (h != NULL) 1831 off = h->got.offset; 1832 else 1833 off = local_got_offsets[r_symndx]; 1834 1835 /* Bit 0 is used to mark whether we've emitted the required 1836 entry (and if needed R_CRIS_32_TPREL reloc). Bit 1 1837 is used similarly for R_CRIS_DTP, see above. */ 1838 if ((off & 1) == 0) 1839 { 1840 off &= ~3; 1841 1842 if (h != NULL) 1843 h->got.offset |= 1; 1844 else 1845 local_got_offsets[r_symndx] |= 1; 1846 1847 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 1848 } 1849 else 1850 off &= ~3; 1851 1852 relocation = sgot->output_offset + off 1853 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0); 1854 } 1855 else 1856 { 1857 /* Emit a real relocation. */ 1858 bfd_vma off; 1859 1860 if (h != NULL) 1861 off = h->got.offset; 1862 else 1863 off = local_got_offsets[r_symndx]; 1864 1865 /* See above re usage of bit 0 and 1. */ 1866 if ((off & 1) == 0) 1867 { 1868 Elf_Internal_Rela outrel; 1869 bfd_byte *loc; 1870 1871 off &= ~3; 1872 1873 if (h != NULL) 1874 h->got.offset |= 1; 1875 else 1876 local_got_offsets[r_symndx] |= 1; 1877 1878 if (srelgot == NULL) 1879 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 1880 BFD_ASSERT (srelgot != NULL); 1881 1882 if (h != NULL && h->dynindx != -1) 1883 { 1884 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL); 1885 relocation = 0; 1886 } 1887 else 1888 { 1889 outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL); 1890 1891 /* NULL if we had an error. */ 1892 relocation -= elf_hash_table (info)->tls_sec == NULL 1893 ? 0 : elf_hash_table (info)->tls_sec->vma; 1894 } 1895 1896 /* Just "define" the initial contents in some 1897 semi-logical way. */ 1898 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 1899 1900 outrel.r_offset = (sgot->output_section->vma 1901 + sgot->output_offset 1902 + off); 1903 outrel.r_addend = relocation; 1904 loc = srelgot->contents; 1905 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 1906 /* NULL if we had an error. */ 1907 if (srelgot->contents != NULL) 1908 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1909 } 1910 else 1911 off &= ~3; 1912 1913 relocation = sgot->output_offset + off 1914 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0); 1915 } 1916 1917 /* The GOT-relative offset to the GOT entry is the relocation, 1918 or for R_CRIS_32_GD, the actual address of the GOT entry. */ 1919 break; 1920 1921 case R_CRIS_16_TPREL: 1922 case R_CRIS_32_TPREL: 1923 /* This relocation must only be performed against symbols 1924 defined in an ordinary (non-DSO) object. */ 1925 if (info->shared) 1926 { 1927 bfd_set_error (bfd_error_invalid_operation); 1928 1929 /* We've already informed in cris_elf_check_relocs that 1930 this is an error. */ 1931 return FALSE; 1932 } 1933 1934 if (h != NULL 1935 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1936 && !(h->def_regular || ELF_COMMON_DEF_P (h)) 1937 /* If it's undefined, then an error message has already 1938 been emitted. */ 1939 && h->root.type != bfd_link_hash_undefined) 1940 { 1941 (*_bfd_error_handler) 1942 (_("%B, section %A: relocation %s is" 1943 " not allowed for symbol: `%s'" 1944 " which is defined outside the program," 1945 " perhaps a declaration mixup?"), 1946 input_bfd, 1947 input_section, 1948 cris_elf_howto_table[r_type].name, 1949 symname); 1950 bfd_set_error (bfd_error_bad_value); 1951 return FALSE; 1952 } 1953 1954 /* NULL if we had an error. */ 1955 relocation -= elf_hash_table (info)->tls_sec == NULL 1956 ? 0 1957 : (elf_hash_table (info)->tls_sec->vma 1958 + elf_hash_table (info)->tls_size); 1959 1960 /* The TLS-relative offset is the relocation. */ 1961 break; 1962 1963 default: 1964 BFD_FAIL (); 1965 return FALSE; 1966 } 1967 1968 r = cris_final_link_relocate (howto, input_bfd, input_section, 1969 contents, rel, relocation); 1970 1971 if (r != bfd_reloc_ok) 1972 { 1973 const char * msg = (const char *) NULL; 1974 1975 switch (r) 1976 { 1977 case bfd_reloc_overflow: 1978 r = info->callbacks->reloc_overflow 1979 (info, (h ? &h->root : NULL), symname, howto->name, 1980 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 1981 if (additional_relocation_error_msg_count > 0) 1982 { 1983 additional_relocation_error_msg_count--; 1984 switch (r_type) 1985 { 1986 case R_CRIS_16_GOTPLT: 1987 case R_CRIS_16_GOT: 1988 1989 /* Not just TLS is involved here, so we make 1990 generation and message depend on -fPIC/-fpic 1991 only. */ 1992 case R_CRIS_16_GOT_TPREL: 1993 case R_CRIS_16_GOT_GD: 1994 (*_bfd_error_handler) 1995 (_("(too many global variables for -fpic:" 1996 " recompile with -fPIC)")); 1997 break; 1998 1999 case R_CRIS_16_TPREL: 2000 case R_CRIS_16_DTPREL: 2001 (*_bfd_error_handler) 2002 (_("(thread-local data too big for -fpic or" 2003 " -msmall-tls: recompile with -fPIC or" 2004 " -mno-small-tls)")); 2005 break; 2006 2007 /* No known cause for overflow for other relocs. */ 2008 default: 2009 break; 2010 } 2011 } 2012 break; 2013 2014 case bfd_reloc_undefined: 2015 r = info->callbacks->undefined_symbol 2016 (info, symname, input_bfd, input_section, rel->r_offset, 2017 TRUE); 2018 break; 2019 2020 case bfd_reloc_outofrange: 2021 msg = _("internal error: out of range error"); 2022 break; 2023 2024 case bfd_reloc_notsupported: 2025 msg = _("internal error: unsupported relocation error"); 2026 break; 2027 2028 case bfd_reloc_dangerous: 2029 msg = _("internal error: dangerous relocation"); 2030 break; 2031 2032 default: 2033 msg = _("internal error: unknown error"); 2034 break; 2035 } 2036 2037 if (msg) 2038 r = info->callbacks->warning 2039 (info, msg, symname, input_bfd, input_section, rel->r_offset); 2040 2041 if (! r) 2042 return FALSE; 2043 } 2044 } 2045 2046 return TRUE; 2047 } 2048 2049 /* Finish up dynamic symbol handling. We set the contents of various 2051 dynamic sections here. */ 2052 2053 static bfd_boolean 2054 elf_cris_finish_dynamic_symbol (bfd *output_bfd, 2055 struct bfd_link_info *info, 2056 struct elf_link_hash_entry *h, 2057 Elf_Internal_Sym *sym) 2058 { 2059 struct elf_cris_link_hash_table * htab; 2060 bfd *dynobj; 2061 2062 /* Where in the plt entry to put values. */ 2063 int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16; 2064 2065 /* What offset to add to the distance to the first PLT entry for the 2066 value at plt_off3. */ 2067 int plt_off3_value_bias = 4; 2068 2069 /* Where in the PLT entry the call-dynlink-stub is (happens to be same 2070 for PIC and non-PIC for v32 and pre-v32). */ 2071 int plt_stub_offset = 8; 2072 int plt_entry_size = PLT_ENTRY_SIZE; 2073 const bfd_byte *plt_entry = elf_cris_plt_entry; 2074 const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry; 2075 2076 htab = elf_cris_hash_table (info); 2077 if (htab == NULL) 2078 return FALSE; 2079 2080 /* Adjust the various PLT entry offsets. */ 2081 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32) 2082 { 2083 plt_off2 = 14; 2084 plt_off3 = 20; 2085 plt_off3_value_bias = -2; 2086 plt_stub_offset = 12; 2087 plt_entry_size = PLT_ENTRY_SIZE_V32; 2088 plt_entry = elf_cris_plt_entry_v32; 2089 plt_pic_entry = elf_cris_pic_plt_entry_v32; 2090 } 2091 2092 dynobj = elf_hash_table (info)->dynobj; 2093 2094 if (h->plt.offset != (bfd_vma) -1) 2095 { 2096 asection *splt; 2097 asection *sgotplt; 2098 asection *srela; 2099 bfd_vma got_base; 2100 2101 bfd_vma gotplt_offset 2102 = elf_cris_hash_entry (h)->gotplt_offset; 2103 Elf_Internal_Rela rela; 2104 bfd_byte *loc; 2105 bfd_boolean has_gotplt = gotplt_offset != 0; 2106 2107 /* Get the index in the .rela.plt relocations for the .got.plt 2108 entry that corresponds to this symbol. 2109 We have to count backwards here, and the result is only valid 2110 as an index into .rela.plt. We also have to undo the effect 2111 of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into 2112 .got.plt) for which gotplt_offset is adjusted, because while 2113 that entry goes into .got.plt, its relocation goes into 2114 .rela.got, not .rela.plt. (It's not PLT-specific; not to be 2115 processed as part of the runtime lazy .rela.plt relocation). 2116 FIXME: There be literal constants here... */ 2117 bfd_vma rela_plt_index 2118 = (htab->dtpmod_refcount != 0 2119 ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3); 2120 2121 /* Get the offset into the .got table of the entry that corresponds 2122 to this function. Note that we embed knowledge that "incoming" 2123 .got goes after .got.plt in the output without padding (pointer 2124 aligned). However, that knowledge is present in several other 2125 places too. */ 2126 bfd_vma got_offset 2127 = (has_gotplt 2128 ? gotplt_offset 2129 : h->got.offset + htab->next_gotplt_entry); 2130 2131 /* This symbol has an entry in the procedure linkage table. Set it 2132 up. */ 2133 2134 BFD_ASSERT (h->dynindx != -1); 2135 2136 splt = bfd_get_linker_section (dynobj, ".plt"); 2137 sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); 2138 srela = bfd_get_linker_section (dynobj, ".rela.plt"); 2139 BFD_ASSERT (splt != NULL && sgotplt != NULL 2140 && (! has_gotplt || srela != NULL)); 2141 2142 got_base = sgotplt->output_section->vma + sgotplt->output_offset; 2143 2144 /* Fill in the entry in the procedure linkage table. */ 2145 if (! info->shared) 2146 { 2147 memcpy (splt->contents + h->plt.offset, plt_entry, 2148 plt_entry_size); 2149 2150 /* We need to enter the absolute address of the GOT entry here. */ 2151 bfd_put_32 (output_bfd, got_base + got_offset, 2152 splt->contents + h->plt.offset + plt_off1); 2153 } 2154 else 2155 { 2156 memcpy (splt->contents + h->plt.offset, plt_pic_entry, 2157 plt_entry_size); 2158 bfd_put_32 (output_bfd, got_offset, 2159 splt->contents + h->plt.offset + plt_off1); 2160 } 2161 2162 /* Fill in the plt entry and make a relocation, if this is a "real" 2163 PLT entry. */ 2164 if (has_gotplt) 2165 { 2166 /* Fill in the offset to the reloc table. */ 2167 bfd_put_32 (output_bfd, 2168 rela_plt_index * sizeof (Elf32_External_Rela), 2169 splt->contents + h->plt.offset + plt_off2); 2170 2171 /* Fill in the offset to the first PLT entry, where to "jump". */ 2172 bfd_put_32 (output_bfd, 2173 - (h->plt.offset + plt_off3 + plt_off3_value_bias), 2174 splt->contents + h->plt.offset + plt_off3); 2175 2176 /* Fill in the entry in the global offset table with the address of 2177 the relocating stub. */ 2178 bfd_put_32 (output_bfd, 2179 (splt->output_section->vma 2180 + splt->output_offset 2181 + h->plt.offset 2182 + plt_stub_offset), 2183 sgotplt->contents + got_offset); 2184 2185 /* Fill in the entry in the .rela.plt section. */ 2186 rela.r_offset = (sgotplt->output_section->vma 2187 + sgotplt->output_offset 2188 + got_offset); 2189 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT); 2190 rela.r_addend = 0; 2191 loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela); 2192 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 2193 } 2194 2195 if (!h->def_regular) 2196 { 2197 /* Mark the symbol as undefined, rather than as defined in 2198 the .plt section. Leave the value alone. */ 2199 sym->st_shndx = SHN_UNDEF; 2200 2201 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't 2202 know whether resetting the value is significant; if it really 2203 is, rather than a quirk or bug in the sparc port, then I 2204 believe we'd see this elsewhere. */ 2205 /* If the symbol is weak, we do need to clear the value. 2206 Otherwise, the PLT entry would provide a definition for 2207 the symbol even if the symbol wasn't defined anywhere, 2208 and so the symbol would never be NULL. */ 2209 if (!h->ref_regular_nonweak) 2210 sym->st_value = 0; 2211 } 2212 } 2213 2214 /* For an ordinary program, we emit .got relocs only for symbols that 2215 are in the dynamic-symbols table and are either defined by the 2216 program or are undefined weak symbols, or are function symbols 2217 where we do not output a PLT: the PLT reloc was output above and all 2218 references to the function symbol are redirected to the PLT. */ 2219 if (h->got.offset != (bfd_vma) -1 2220 && (elf_cris_hash_entry (h)->reg_got_refcount > 0) 2221 && (info->shared 2222 || (h->dynindx != -1 2223 && h->plt.offset == (bfd_vma) -1 2224 && !h->def_regular 2225 && h->root.type != bfd_link_hash_undefweak))) 2226 { 2227 asection *sgot; 2228 asection *srela; 2229 Elf_Internal_Rela rela; 2230 bfd_byte *loc; 2231 bfd_byte *where; 2232 2233 /* This symbol has an entry in the global offset table. Set it up. */ 2234 2235 sgot = bfd_get_linker_section (dynobj, ".got"); 2236 srela = bfd_get_linker_section (dynobj, ".rela.got"); 2237 BFD_ASSERT (sgot != NULL && srela != NULL); 2238 2239 rela.r_offset = (sgot->output_section->vma 2240 + sgot->output_offset 2241 + (h->got.offset &~ (bfd_vma) 1)); 2242 2243 /* If this is a static link, or it is a -Bsymbolic link and the 2244 symbol is defined locally or was forced to be local because 2245 of a version file, we just want to emit a RELATIVE reloc. 2246 The entry in the global offset table will already have been 2247 initialized in the relocate_section function. */ 2248 where = sgot->contents + (h->got.offset &~ (bfd_vma) 1); 2249 if (! elf_hash_table (info)->dynamic_sections_created 2250 || (info->shared 2251 && (info->symbolic || h->dynindx == -1) 2252 && h->def_regular)) 2253 { 2254 rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE); 2255 rela.r_addend = bfd_get_signed_32 (output_bfd, where); 2256 } 2257 else 2258 { 2259 bfd_put_32 (output_bfd, (bfd_vma) 0, where); 2260 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT); 2261 rela.r_addend = 0; 2262 } 2263 2264 loc = srela->contents; 2265 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); 2266 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 2267 } 2268 2269 if (h->needs_copy) 2270 { 2271 asection *s; 2272 Elf_Internal_Rela rela; 2273 bfd_byte *loc; 2274 2275 /* This symbol needs a copy reloc. Set it up. */ 2276 2277 BFD_ASSERT (h->dynindx != -1 2278 && (h->root.type == bfd_link_hash_defined 2279 || h->root.type == bfd_link_hash_defweak)); 2280 2281 s = bfd_get_linker_section (dynobj, ".rela.bss"); 2282 BFD_ASSERT (s != NULL); 2283 2284 rela.r_offset = (h->root.u.def.value 2285 + h->root.u.def.section->output_section->vma 2286 + h->root.u.def.section->output_offset); 2287 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY); 2288 rela.r_addend = 0; 2289 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 2290 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 2291 } 2292 2293 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ 2294 if (h == elf_hash_table (info)->hdynamic 2295 || h == elf_hash_table (info)->hgot) 2296 sym->st_shndx = SHN_ABS; 2297 2298 return TRUE; 2299 } 2300 2301 /* Finish up the dynamic sections. Do *not* emit relocs here, as their 2303 offsets were changed, as part of -z combreloc handling, from those we 2304 computed. */ 2305 2306 static bfd_boolean 2307 elf_cris_finish_dynamic_sections (bfd *output_bfd, 2308 struct bfd_link_info *info) 2309 { 2310 bfd *dynobj; 2311 asection *sgot; 2312 asection *sdyn; 2313 2314 dynobj = elf_hash_table (info)->dynobj; 2315 2316 sgot = bfd_get_linker_section (dynobj, ".got.plt"); 2317 BFD_ASSERT (sgot != NULL); 2318 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 2319 2320 if (elf_hash_table (info)->dynamic_sections_created) 2321 { 2322 asection *splt; 2323 Elf32_External_Dyn *dyncon, *dynconend; 2324 2325 splt = bfd_get_linker_section (dynobj, ".plt"); 2326 BFD_ASSERT (splt != NULL && sdyn != NULL); 2327 2328 dyncon = (Elf32_External_Dyn *) sdyn->contents; 2329 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 2330 for (; dyncon < dynconend; dyncon++) 2331 { 2332 Elf_Internal_Dyn dyn; 2333 asection *s; 2334 2335 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 2336 2337 switch (dyn.d_tag) 2338 { 2339 default: 2340 break; 2341 2342 case DT_PLTGOT: 2343 s = bfd_get_section_by_name (output_bfd, ".got"); 2344 BFD_ASSERT (s != NULL); 2345 dyn.d_un.d_ptr = s->vma; 2346 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2347 break; 2348 2349 case DT_JMPREL: 2350 /* Yes, we *can* have a .plt and no .plt.rela, for instance 2351 if all symbols are found in the .got (not .got.plt). */ 2352 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 2353 dyn.d_un.d_ptr = s != NULL ? s->vma : 0; 2354 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2355 break; 2356 2357 case DT_PLTRELSZ: 2358 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 2359 if (s == NULL) 2360 dyn.d_un.d_val = 0; 2361 else 2362 dyn.d_un.d_val = s->size; 2363 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2364 break; 2365 2366 case DT_RELASZ: 2367 /* The procedure linkage table relocs (DT_JMPREL) should 2368 not be included in the overall relocs (DT_RELA). 2369 Therefore, we override the DT_RELASZ entry here to 2370 make it not include the JMPREL relocs. Since the 2371 linker script arranges for .rela.plt to follow all 2372 other relocation sections, we don't have to worry 2373 about changing the DT_RELA entry. */ 2374 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 2375 if (s != NULL) 2376 dyn.d_un.d_val -= s->size; 2377 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2378 break; 2379 } 2380 } 2381 2382 /* Fill in the first entry in the procedure linkage table. */ 2383 if (splt->size > 0) 2384 { 2385 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32) 2386 { 2387 if (info->shared) 2388 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32, 2389 PLT_ENTRY_SIZE_V32); 2390 else 2391 { 2392 memcpy (splt->contents, elf_cris_plt0_entry_v32, 2393 PLT_ENTRY_SIZE_V32); 2394 bfd_put_32 (output_bfd, 2395 sgot->output_section->vma 2396 + sgot->output_offset + 4, 2397 splt->contents + 4); 2398 2399 elf_section_data (splt->output_section)->this_hdr.sh_entsize 2400 = PLT_ENTRY_SIZE_V32; 2401 } 2402 } 2403 else 2404 { 2405 if (info->shared) 2406 memcpy (splt->contents, elf_cris_pic_plt0_entry, 2407 PLT_ENTRY_SIZE); 2408 else 2409 { 2410 memcpy (splt->contents, elf_cris_plt0_entry, 2411 PLT_ENTRY_SIZE); 2412 bfd_put_32 (output_bfd, 2413 sgot->output_section->vma 2414 + sgot->output_offset + 4, 2415 splt->contents + 6); 2416 bfd_put_32 (output_bfd, 2417 sgot->output_section->vma 2418 + sgot->output_offset + 8, 2419 splt->contents + 14); 2420 2421 elf_section_data (splt->output_section)->this_hdr.sh_entsize 2422 = PLT_ENTRY_SIZE; 2423 } 2424 } 2425 } 2426 } 2427 2428 /* Fill in the first three entries in the global offset table. */ 2429 if (sgot->size > 0) 2430 { 2431 if (sdyn == NULL) 2432 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 2433 else 2434 bfd_put_32 (output_bfd, 2435 sdyn->output_section->vma + sdyn->output_offset, 2436 sgot->contents); 2437 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); 2438 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); 2439 } 2440 2441 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 2442 2443 return TRUE; 2444 } 2445 2446 /* Return the section that should be marked against GC for a given 2448 relocation. */ 2449 2450 static asection * 2451 cris_elf_gc_mark_hook (asection *sec, 2452 struct bfd_link_info *info, 2453 Elf_Internal_Rela *rel, 2454 struct elf_link_hash_entry *h, 2455 Elf_Internal_Sym *sym) 2456 { 2457 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info); 2458 if (h != NULL) 2459 switch (r_type) 2460 { 2461 case R_CRIS_GNU_VTINHERIT: 2462 case R_CRIS_GNU_VTENTRY: 2463 return NULL; 2464 2465 default: 2466 break; 2467 } 2468 2469 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 2470 } 2471 2472 /* Update the got entry reference counts for the section being removed. */ 2473 2474 static bfd_boolean 2475 cris_elf_gc_sweep_hook (bfd *abfd, 2476 struct bfd_link_info *info, 2477 asection *sec, 2478 const Elf_Internal_Rela *relocs) 2479 { 2480 struct elf_cris_link_hash_table * htab; 2481 Elf_Internal_Shdr *symtab_hdr; 2482 struct elf_link_hash_entry **sym_hashes; 2483 bfd_signed_vma *local_got_refcounts; 2484 const Elf_Internal_Rela *rel, *relend; 2485 bfd *dynobj; 2486 asection *sgot; 2487 asection *srelgot; 2488 2489 if (info->relocatable) 2490 return TRUE; 2491 2492 dynobj = elf_hash_table (info)->dynobj; 2493 if (dynobj == NULL) 2494 return TRUE; 2495 2496 htab = elf_cris_hash_table (info); 2497 if (htab == NULL) 2498 return FALSE; 2499 2500 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 2501 sym_hashes = elf_sym_hashes (abfd); 2502 local_got_refcounts = elf_local_got_refcounts (abfd); 2503 2504 sgot = bfd_get_linker_section (dynobj, ".got"); 2505 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 2506 2507 relend = relocs + sec->reloc_count; 2508 for (rel = relocs; rel < relend; rel++) 2509 { 2510 unsigned long r_symndx; 2511 struct elf_link_hash_entry *h = NULL; 2512 bfd_signed_vma got_element_size = 4; 2513 bfd_signed_vma *specific_refcount = NULL; 2514 enum elf_cris_reloc_type r_type; 2515 2516 r_symndx = ELF32_R_SYM (rel->r_info); 2517 if (r_symndx >= symtab_hdr->sh_info) 2518 { 2519 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 2520 while (h->root.type == bfd_link_hash_indirect 2521 || h->root.type == bfd_link_hash_warning) 2522 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2523 } 2524 2525 r_type = ELF32_R_TYPE (rel->r_info); 2526 switch (r_type) 2527 { 2528 case R_CRIS_32_GOT: 2529 case R_CRIS_16_GOT: 2530 case R_CRIS_16_GOTPLT: 2531 case R_CRIS_32_GOTPLT: 2532 specific_refcount = h != NULL 2533 ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount 2534 : &local_got_refcounts[LGOT_REG_NDX (r_symndx)]; 2535 break; 2536 2537 case R_CRIS_32_GD: 2538 case R_CRIS_32_GOT_GD: 2539 case R_CRIS_16_GOT_GD: 2540 got_element_size = 8; 2541 specific_refcount = h != NULL 2542 ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount 2543 : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)]; 2544 break; 2545 2546 case R_CRIS_32_IE: 2547 case R_CRIS_16_GOT_TPREL: 2548 case R_CRIS_32_GOT_TPREL: 2549 specific_refcount = h != NULL 2550 ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount 2551 : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)]; 2552 break; 2553 2554 default: 2555 break; 2556 } 2557 2558 switch (r_type) 2559 { 2560 case R_CRIS_32_IE: 2561 case R_CRIS_32_GD: 2562 case R_CRIS_16_GOT_TPREL: 2563 case R_CRIS_32_GOT_TPREL: 2564 case R_CRIS_32_GOT_GD: 2565 case R_CRIS_16_GOT_GD: 2566 case R_CRIS_16_GOT: 2567 case R_CRIS_32_GOT: 2568 if (h != NULL) 2569 { 2570 /* If the counters are 0 when we got here, we've 2571 miscounted somehow somewhere, an internal error. */ 2572 BFD_ASSERT (h->got.refcount > 0); 2573 --h->got.refcount; 2574 2575 BFD_ASSERT (*specific_refcount > 0); 2576 --*specific_refcount; 2577 if (*specific_refcount == 0) 2578 { 2579 /* We don't need the .got entry any more. */ 2580 sgot->size -= got_element_size; 2581 srelgot->size -= sizeof (Elf32_External_Rela); 2582 } 2583 break; 2584 } 2585 2586 local_got_reloc: 2587 if (local_got_refcounts != NULL) 2588 { 2589 /* If the counters are 0 when we got here, we've 2590 miscounted somehow somewhere, an internal error. */ 2591 BFD_ASSERT (local_got_refcounts[r_symndx] > 0); 2592 --local_got_refcounts[r_symndx]; 2593 2594 BFD_ASSERT (*specific_refcount > 0); 2595 --*specific_refcount; 2596 if (*specific_refcount == 0) 2597 { 2598 /* We don't need the .got entry any more. */ 2599 sgot->size -= got_element_size; 2600 if (info->shared) 2601 srelgot->size -= sizeof (Elf32_External_Rela); 2602 } 2603 } 2604 break; 2605 2606 case R_CRIS_16_GOTPLT: 2607 case R_CRIS_32_GOTPLT: 2608 /* For local symbols, treat these like GOT relocs. */ 2609 if (h == NULL) 2610 goto local_got_reloc; 2611 else 2612 /* For global symbols, adjust the reloc-specific refcount. */ 2613 elf_cris_hash_entry (h)->gotplt_refcount--; 2614 /* Fall through. */ 2615 2616 case R_CRIS_32_PLT_GOTREL: 2617 /* FIXME: We don't garbage-collect away the .got section. */ 2618 if (local_got_refcounts != NULL) 2619 local_got_refcounts[-1]--; 2620 /* Fall through. */ 2621 2622 case R_CRIS_8: 2623 case R_CRIS_16: 2624 case R_CRIS_32: 2625 case R_CRIS_8_PCREL: 2626 case R_CRIS_16_PCREL: 2627 case R_CRIS_32_PCREL: 2628 case R_CRIS_32_PLT_PCREL: 2629 /* Negate the increment we did in cris_elf_check_relocs. */ 2630 if (h != NULL) 2631 { 2632 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 2633 && h->plt.refcount > 0) 2634 --h->plt.refcount; 2635 } 2636 break; 2637 2638 case R_CRIS_32_DTPREL: 2639 /* This'd be a .dtpreld entry in e.g. debug info. */ 2640 if ((sec->flags & SEC_ALLOC) == 0) 2641 break; 2642 /* Fall through. */ 2643 case R_CRIS_16_DTPREL: 2644 htab->dtpmod_refcount--; 2645 if (htab->dtpmod_refcount == 0) 2646 htab->next_gotplt_entry -= 8; 2647 BFD_ASSERT (local_got_refcounts != NULL); 2648 local_got_refcounts[-1]--; 2649 break; 2650 2651 default: 2652 break; 2653 } 2654 } 2655 2656 return TRUE; 2657 } 2658 2659 /* The elf_backend_plt_sym_val hook function. */ 2660 2661 static bfd_vma 2662 cris_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, const asection *plt, 2663 const arelent *rel) 2664 { 2665 bfd_size_type plt_entry_size; 2666 bfd_size_type pltoffs; 2667 bfd *abfd = plt->owner; 2668 2669 /* Same for CRIS and CRIS v32; see elf_cris_(|pic_)plt_entry(|_v32)[]. */ 2670 bfd_size_type plt_entry_got_offset = 2; 2671 bfd_size_type plt_sec_size; 2672 bfd_size_type got_vma_for_dyn; 2673 asection *got; 2674 2675 /* FIXME: the .got section should be readily available also when 2676 we're not linking. */ 2677 if ((got = bfd_get_section_by_name (abfd, ".got")) == NULL) 2678 return (bfd_vma) -1; 2679 2680 plt_sec_size = bfd_section_size (plt->owner, plt); 2681 plt_entry_size 2682 = (bfd_get_mach (abfd) == bfd_mach_cris_v32 2683 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE); 2684 2685 /* Data in PLT is GOT-relative for DYN, but absolute for EXE. */ 2686 got_vma_for_dyn = (abfd->flags & EXEC_P) ? 0 : got->vma; 2687 2688 /* Because we can have merged GOT entries; a single .got entry for 2689 both GOT and the PLT part of the GOT (.got.plt), the index of the 2690 reloc in .rela.plt is not the same as the index in the PLT. 2691 Instead, we have to hunt down the GOT offset in the PLT that 2692 corresponds to that of this reloc. Unfortunately, we will only 2693 be called for the .rela.plt relocs, so we'll miss synthetic 2694 symbols for .plt entries with merged GOT entries. (FIXME: 2695 fixable by providing our own bfd_elf32_get_synthetic_symtab. 2696 Doesn't seem worthwile at time of this writing.) FIXME: we've 2697 gone from O(1) to O(N) (N number of PLT entries) for finding each 2698 PLT address. Shouldn't matter in practice though. */ 2699 2700 for (pltoffs = plt_entry_size; 2701 pltoffs < plt_sec_size; 2702 pltoffs += plt_entry_size) 2703 { 2704 bfd_size_type got_offset; 2705 bfd_byte gotoffs_raw[4]; 2706 2707 if (!bfd_get_section_contents (abfd, (asection *) plt, gotoffs_raw, 2708 pltoffs + plt_entry_got_offset, 2709 sizeof (gotoffs_raw))) 2710 return (bfd_vma) -1; 2711 2712 got_offset = bfd_get_32 (abfd, gotoffs_raw); 2713 if (got_offset + got_vma_for_dyn == rel->address) 2714 return plt->vma + pltoffs; 2715 } 2716 2717 /* While it's tempting to BFD_ASSERT that we shouldn't get here, 2718 that'd not be graceful behavior for invalid input. */ 2719 return (bfd_vma) -1; 2720 } 2721 2722 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT 2723 entry but we found we will not create any. Called when we find we will 2724 not have any PLT for this symbol, by for example 2725 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link, 2726 or elf_cris_size_dynamic_sections if no dynamic sections will be 2727 created (we're only linking static objects). */ 2728 2729 static bfd_boolean 2730 elf_cris_adjust_gotplt_to_got (struct elf_cris_link_hash_entry *h, void * p) 2731 { 2732 struct bfd_link_info *info = (struct bfd_link_info *) p; 2733 2734 /* A GOTPLT reloc, when activated, is supposed to be included into 2735 the PLT refcount. */ 2736 BFD_ASSERT (h->gotplt_refcount == 0 2737 || h->gotplt_refcount <= h->root.plt.refcount); 2738 2739 /* If nobody wanted a GOTPLT with this symbol, we're done. */ 2740 if (h->gotplt_refcount <= 0) 2741 return TRUE; 2742 2743 if (h->reg_got_refcount > 0) 2744 { 2745 /* There's a GOT entry for this symbol. Just adjust the refcounts. 2746 Probably not necessary at this stage, but keeping them accurate 2747 helps avoiding surprises later. */ 2748 h->root.got.refcount += h->gotplt_refcount; 2749 h->reg_got_refcount += h->gotplt_refcount; 2750 h->gotplt_refcount = 0; 2751 } 2752 else 2753 { 2754 /* No GOT entry for this symbol. We need to create one. */ 2755 bfd *dynobj = elf_hash_table (info)->dynobj; 2756 asection *sgot; 2757 asection *srelgot; 2758 2759 BFD_ASSERT (dynobj != NULL); 2760 sgot = bfd_get_linker_section (dynobj, ".got"); 2761 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 2762 2763 /* Put accurate refcounts there. */ 2764 h->root.got.refcount += h->gotplt_refcount; 2765 h->reg_got_refcount = h->gotplt_refcount; 2766 2767 h->gotplt_refcount = 0; 2768 2769 /* We always have a .got and a .rela.got section if there were 2770 GOTPLT relocs in input. */ 2771 BFD_ASSERT (sgot != NULL && srelgot != NULL); 2772 2773 /* Allocate space in the .got section. */ 2774 sgot->size += 4; 2775 2776 /* Allocate relocation space. */ 2777 srelgot->size += sizeof (Elf32_External_Rela); 2778 } 2779 2780 return TRUE; 2781 } 2782 2783 /* Try to fold PLT entries with GOT entries. There are two cases when we 2784 want to do this: 2785 2786 - When all PLT references are GOTPLT references, and there are GOT 2787 references, and this is not the executable. We don't have to 2788 generate a PLT at all. 2789 2790 - When there are both (ordinary) PLT references and GOT references, 2791 and this isn't the executable. 2792 We want to make the PLT reference use the ordinary GOT entry rather 2793 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry, 2794 since the GOT entry will have to be resolved at startup anyway. 2795 2796 Though the latter case is handled when room for the PLT is allocated, 2797 not here. 2798 2799 By folding into the GOT, we may need a round-trip to a PLT in the 2800 executable for calls, a loss in performance. Still, losing a 2801 reloc is a win in size and at least in start-up time. 2802 2803 Note that this function is called before symbols are forced local by 2804 version scripts. The differing cases are handled by 2805 elf_cris_hide_symbol. */ 2806 2807 static bfd_boolean 2808 elf_cris_try_fold_plt_to_got (struct elf_cris_link_hash_entry *h, void * p) 2809 { 2810 struct bfd_link_info *info = (struct bfd_link_info *) p; 2811 2812 /* If there are no GOT references for this symbol, we can't fold any 2813 other reference so there's nothing to do. Likewise if there are no 2814 PLT references; GOTPLT references included. */ 2815 if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0) 2816 return TRUE; 2817 2818 /* GOTPLT relocs are supposed to be included into the PLT refcount. */ 2819 BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount); 2820 2821 if (h->gotplt_refcount == h->root.plt.refcount) 2822 { 2823 /* The only PLT references are GOTPLT references, and there are GOT 2824 references. Convert PLT to GOT references. */ 2825 if (! elf_cris_adjust_gotplt_to_got (h, info)) 2826 return FALSE; 2827 2828 /* Clear the PLT references, so no PLT will be created. */ 2829 h->root.plt.offset = (bfd_vma) -1; 2830 } 2831 2832 return TRUE; 2833 } 2834 2835 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc 2836 to use a GOT entry (and create one) rather than requiring a GOTPLT 2837 entry. */ 2838 2839 static void 2840 elf_cris_hide_symbol (struct bfd_link_info *info, 2841 struct elf_link_hash_entry *h, 2842 bfd_boolean force_local) 2843 { 2844 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info); 2845 2846 _bfd_elf_link_hash_hide_symbol (info, h, force_local); 2847 } 2848 2849 /* Adjust a symbol defined by a dynamic object and referenced by a 2850 regular object. The current definition is in some section of the 2851 dynamic object, but we're not including those sections. We have to 2852 change the definition to something the rest of the link can 2853 understand. */ 2854 2855 static bfd_boolean 2856 elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info, 2857 struct elf_link_hash_entry *h) 2858 { 2859 struct elf_cris_link_hash_table * htab; 2860 bfd *dynobj; 2861 asection *s; 2862 bfd_size_type plt_entry_size; 2863 2864 htab = elf_cris_hash_table (info); 2865 if (htab == NULL) 2866 return FALSE; 2867 2868 dynobj = elf_hash_table (info)->dynobj; 2869 2870 /* Make sure we know what is going on here. */ 2871 BFD_ASSERT (dynobj != NULL 2872 && (h->needs_plt 2873 || h->u.weakdef != NULL 2874 || (h->def_dynamic 2875 && h->ref_regular 2876 && !h->def_regular))); 2877 2878 plt_entry_size 2879 = (bfd_get_mach (dynobj) == bfd_mach_cris_v32 2880 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE); 2881 2882 /* If this is a function, put it in the procedure linkage table. We 2883 will fill in the contents of the procedure linkage table later, 2884 when we know the address of the .got section. */ 2885 if (h->type == STT_FUNC 2886 || h->needs_plt) 2887 { 2888 /* If we link a program (not a DSO), we'll get rid of unnecessary 2889 PLT entries; we point to the actual symbols -- even for pic 2890 relocs, because a program built with -fpic should have the same 2891 result as one built without -fpic, specifically considering weak 2892 symbols. 2893 FIXME: m68k and i386 differ here, for unclear reasons. */ 2894 if (! info->shared 2895 && !h->def_dynamic) 2896 { 2897 /* This case can occur if we saw a PLT reloc in an input file, 2898 but the symbol was not defined by a dynamic object. In such 2899 a case, we don't actually need to build a procedure linkage 2900 table, and we can just do an absolute or PC reloc instead, or 2901 change a .got.plt index to a .got index for GOTPLT relocs. */ 2902 BFD_ASSERT (h->needs_plt); 2903 h->needs_plt = 0; 2904 h->plt.offset = (bfd_vma) -1; 2905 return 2906 elf_cris_adjust_gotplt_to_got ((struct 2907 elf_cris_link_hash_entry *) h, 2908 info); 2909 } 2910 2911 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT; 2912 where a pointer-equivalent symbol was unimportant (i.e. more 2913 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid 2914 of the PLT. We can't for the executable, because the GOT 2915 entries will point to the PLT there (and be constant). */ 2916 if (info->shared 2917 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*) 2918 h, info)) 2919 return FALSE; 2920 2921 /* GC or folding may have rendered this entry unused. */ 2922 if (h->plt.refcount <= 0) 2923 { 2924 h->needs_plt = 0; 2925 h->plt.offset = (bfd_vma) -1; 2926 return TRUE; 2927 } 2928 2929 /* Make sure this symbol is output as a dynamic symbol. */ 2930 if (h->dynindx == -1) 2931 { 2932 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2933 return FALSE; 2934 } 2935 2936 s = bfd_get_linker_section (dynobj, ".plt"); 2937 BFD_ASSERT (s != NULL); 2938 2939 /* If this is the first .plt entry, make room for the special 2940 first entry. */ 2941 if (s->size == 0) 2942 s->size += plt_entry_size; 2943 2944 /* If this symbol is not defined in a regular file, and we are 2945 not generating a shared library, then set the symbol to this 2946 location in the .plt. */ 2947 if (!info->shared 2948 && !h->def_regular) 2949 { 2950 h->root.u.def.section = s; 2951 h->root.u.def.value = s->size; 2952 } 2953 2954 /* If there's already a GOT entry, use that, not a .got.plt. A 2955 GOT field still has a reference count when we get here; it's 2956 not yet changed to an offset. We can't do this for an 2957 executable, because then the reloc associated with the PLT 2958 would get a non-PLT reloc pointing to the PLT. FIXME: Move 2959 this to elf_cris_try_fold_plt_to_got. */ 2960 if (info->shared && h->got.refcount > 0) 2961 { 2962 h->got.refcount += h->plt.refcount; 2963 2964 /* Mark the PLT offset to use the GOT entry by setting the low 2965 bit in the plt offset; it is always a multiple of 2966 plt_entry_size (which is at least a multiple of 2). */ 2967 BFD_ASSERT ((s->size % plt_entry_size) == 0); 2968 2969 /* Change the PLT refcount to an offset. */ 2970 h->plt.offset = s->size; 2971 2972 /* By not setting gotplt_offset (i.e. it remains at 0), we signal 2973 that the got entry should be used instead. */ 2974 BFD_ASSERT (((struct elf_cris_link_hash_entry *) 2975 h)->gotplt_offset == 0); 2976 2977 /* Make room for this entry. */ 2978 s->size += plt_entry_size; 2979 2980 return TRUE; 2981 } 2982 2983 /* No GOT reference for this symbol; prepare for an ordinary PLT. */ 2984 h->plt.offset = s->size; 2985 2986 /* Make room for this entry. */ 2987 s->size += plt_entry_size; 2988 2989 /* We also need to make an entry in the .got.plt section, which 2990 will be placed in the .got section by the linker script. */ 2991 ((struct elf_cris_link_hash_entry *) h)->gotplt_offset 2992 = htab->next_gotplt_entry; 2993 htab->next_gotplt_entry += 4; 2994 2995 s = bfd_get_linker_section (dynobj, ".got.plt"); 2996 BFD_ASSERT (s != NULL); 2997 s->size += 4; 2998 2999 /* We also need to make an entry in the .rela.plt section. */ 3000 3001 s = bfd_get_linker_section (dynobj, ".rela.plt"); 3002 BFD_ASSERT (s != NULL); 3003 s->size += sizeof (Elf32_External_Rela); 3004 3005 return TRUE; 3006 } 3007 3008 /* Reinitialize the plt offset now that it is not used as a reference 3009 count any more. */ 3010 h->plt.offset = (bfd_vma) -1; 3011 3012 /* If this is a weak symbol, and there is a real definition, the 3013 processor independent code will have arranged for us to see the 3014 real definition first, and we can just use the same value. */ 3015 if (h->u.weakdef != NULL) 3016 { 3017 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 3018 || h->u.weakdef->root.type == bfd_link_hash_defweak); 3019 h->root.u.def.section = h->u.weakdef->root.u.def.section; 3020 h->root.u.def.value = h->u.weakdef->root.u.def.value; 3021 return TRUE; 3022 } 3023 3024 /* This is a reference to a symbol defined by a dynamic object which 3025 is not a function. */ 3026 3027 /* If we are creating a shared library, we must presume that the 3028 only references to the symbol are via the global offset table. 3029 For such cases we need not do anything here; the relocations will 3030 be handled correctly by relocate_section. */ 3031 if (info->shared) 3032 return TRUE; 3033 3034 /* If there are no references to this symbol that do not use the 3035 GOT, we don't need to generate a copy reloc. */ 3036 if (!h->non_got_ref) 3037 return TRUE; 3038 3039 /* We must allocate the symbol in our .dynbss section, which will 3040 become part of the .bss section of the executable. There will be 3041 an entry for this symbol in the .dynsym section. The dynamic 3042 object will contain position independent code, so all references 3043 from the dynamic object to this symbol will go through the global 3044 offset table. The dynamic linker will use the .dynsym entry to 3045 determine the address it must put in the global offset table, so 3046 both the dynamic object and the regular object will refer to the 3047 same memory location for the variable. */ 3048 3049 s = bfd_get_linker_section (dynobj, ".dynbss"); 3050 BFD_ASSERT (s != NULL); 3051 3052 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to 3053 copy the initial value out of the dynamic object and into the 3054 runtime process image. We need to remember the offset into the 3055 .rela.bss section we are going to use. */ 3056 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 3057 { 3058 asection *srel; 3059 3060 srel = bfd_get_linker_section (dynobj, ".rela.bss"); 3061 BFD_ASSERT (srel != NULL); 3062 srel->size += sizeof (Elf32_External_Rela); 3063 h->needs_copy = 1; 3064 } 3065 3066 return _bfd_elf_adjust_dynamic_copy (h, s); 3067 } 3068 3069 /* Adjust our "subclass" elements for an indirect symbol. */ 3070 3071 static void 3072 elf_cris_copy_indirect_symbol (struct bfd_link_info *info, 3073 struct elf_link_hash_entry *dir, 3074 struct elf_link_hash_entry *ind) 3075 { 3076 struct elf_cris_link_hash_entry *edir, *eind; 3077 3078 edir = (struct elf_cris_link_hash_entry *) dir; 3079 eind = (struct elf_cris_link_hash_entry *) ind; 3080 3081 /* Only indirect symbols are replaced; we're not interested in 3082 updating any of EIND's fields for other symbols. */ 3083 if (eind->root.root.type != bfd_link_hash_indirect) 3084 { 3085 /* Still, we need to copy flags for e.g. weak definitions. */ 3086 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 3087 return; 3088 } 3089 3090 BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0); 3091 3092 #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z 3093 #define XMOVE(F) XMOVOPZ (F, +=, 0) 3094 if (eind->pcrel_relocs_copied != NULL) 3095 { 3096 if (edir->pcrel_relocs_copied != NULL) 3097 { 3098 struct elf_cris_pcrel_relocs_copied **pp; 3099 struct elf_cris_pcrel_relocs_copied *p; 3100 3101 /* Add reloc counts against the indirect sym to the direct sym 3102 list. Merge any entries against the same section. */ 3103 for (pp = &eind->pcrel_relocs_copied; *pp != NULL;) 3104 { 3105 struct elf_cris_pcrel_relocs_copied *q; 3106 p = *pp; 3107 for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next) 3108 if (q->section == p->section) 3109 { 3110 q->count += p->count; 3111 *pp = p->next; 3112 break; 3113 } 3114 if (q == NULL) 3115 pp = &p->next; 3116 } 3117 *pp = edir->pcrel_relocs_copied; 3118 } 3119 XMOVOPZ (pcrel_relocs_copied, =, NULL); 3120 } 3121 XMOVE (gotplt_refcount); 3122 XMOVE (gotplt_offset); 3123 XMOVE (reg_got_refcount); 3124 XMOVE (tprel_refcount); 3125 XMOVE (dtp_refcount); 3126 #undef XMOVE 3127 #undef XMOVOPZ 3128 3129 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 3130 } 3131 3132 /* Look through the relocs for a section during the first phase. */ 3133 3134 static bfd_boolean 3135 cris_elf_check_relocs (bfd *abfd, 3136 struct bfd_link_info *info, 3137 asection *sec, 3138 const Elf_Internal_Rela *relocs) 3139 { 3140 struct elf_cris_link_hash_table * htab; 3141 bfd *dynobj; 3142 Elf_Internal_Shdr *symtab_hdr; 3143 struct elf_link_hash_entry **sym_hashes; 3144 bfd_signed_vma *local_got_refcounts; 3145 const Elf_Internal_Rela *rel; 3146 const Elf_Internal_Rela *rel_end; 3147 asection *sgot; 3148 asection *srelgot; 3149 asection *sreloc; 3150 3151 if (info->relocatable) 3152 return TRUE; 3153 3154 htab = elf_cris_hash_table (info); 3155 if (htab == NULL) 3156 return FALSE; 3157 3158 dynobj = elf_hash_table (info)->dynobj; 3159 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 3160 sym_hashes = elf_sym_hashes (abfd); 3161 local_got_refcounts = elf_local_got_refcounts (abfd); 3162 3163 sgot = NULL; 3164 srelgot = NULL; 3165 sreloc = NULL; 3166 3167 rel_end = relocs + sec->reloc_count; 3168 for (rel = relocs; rel < rel_end; rel++) 3169 { 3170 struct elf_link_hash_entry *h; 3171 unsigned long r_symndx; 3172 enum elf_cris_reloc_type r_type; 3173 bfd_signed_vma got_element_size = 4; 3174 unsigned long r_symndx_lgot = INT_MAX; 3175 3176 r_symndx = ELF32_R_SYM (rel->r_info); 3177 if (r_symndx < symtab_hdr->sh_info) 3178 { 3179 h = NULL; 3180 r_symndx_lgot = LGOT_REG_NDX (r_symndx); 3181 } 3182 else 3183 { 3184 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3185 while (h->root.type == bfd_link_hash_indirect 3186 || h->root.type == bfd_link_hash_warning) 3187 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3188 3189 /* PR15323, ref flags aren't set for references in the same 3190 object. */ 3191 h->root.non_ir_ref = 1; 3192 } 3193 3194 r_type = ELF32_R_TYPE (rel->r_info); 3195 3196 /* Some relocs require linker-created sections; we need to hang them 3197 on the first input bfd we found that contained dynamic relocs. */ 3198 switch (r_type) 3199 { 3200 case R_CRIS_32_DTPREL: 3201 if ((sec->flags & SEC_ALLOC) == 0) 3202 /* This'd be a .dtpreld entry in e.g. debug info. We have 3203 several different switch statements below, but none of 3204 that is needed; we need no preparations for resolving 3205 R_CRIS_32_DTPREL into a non-allocated section (debug 3206 info), so let's just move on to the next 3207 relocation. */ 3208 continue; 3209 /* Fall through. */ 3210 case R_CRIS_16_DTPREL: 3211 /* The first .got.plt entry is right after the R_CRIS_DTPMOD 3212 entry at index 3. */ 3213 if (htab->dtpmod_refcount == 0) 3214 htab->next_gotplt_entry += 8; 3215 3216 htab->dtpmod_refcount++; 3217 /* Fall through. */ 3218 3219 case R_CRIS_32_IE: 3220 case R_CRIS_32_GD: 3221 case R_CRIS_16_GOT_GD: 3222 case R_CRIS_32_GOT_GD: 3223 case R_CRIS_32_GOT_TPREL: 3224 case R_CRIS_16_GOT_TPREL: 3225 case R_CRIS_16_GOT: 3226 case R_CRIS_32_GOT: 3227 case R_CRIS_32_GOTREL: 3228 case R_CRIS_32_PLT_GOTREL: 3229 case R_CRIS_32_PLT_PCREL: 3230 case R_CRIS_16_GOTPLT: 3231 case R_CRIS_32_GOTPLT: 3232 if (dynobj == NULL) 3233 { 3234 elf_hash_table (info)->dynobj = dynobj = abfd; 3235 3236 /* We could handle this if we can get a handle on the 3237 output bfd in elf_cris_adjust_dynamic_symbol. Failing 3238 that, we must insist on dynobj being a specific mach. */ 3239 if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32) 3240 { 3241 (*_bfd_error_handler) 3242 (_("%B, section %A:\n v10/v32 compatible object %s" 3243 " must not contain a PIC relocation"), 3244 abfd, sec); 3245 return FALSE; 3246 } 3247 } 3248 3249 if (sgot == NULL) 3250 { 3251 /* We may have a dynobj but no .got section, if machine- 3252 independent parts of the linker found a reason to create 3253 a dynobj. We want to create the .got section now, so we 3254 can assume it's always present whenever there's a dynobj. 3255 It's ok to call this function more than once. */ 3256 if (!_bfd_elf_create_got_section (dynobj, info)) 3257 return FALSE; 3258 3259 sgot = bfd_get_linker_section (dynobj, ".got"); 3260 } 3261 3262 if (local_got_refcounts == NULL) 3263 { 3264 bfd_size_type amt; 3265 3266 /* We use index local_got_refcounts[-1] to count all 3267 GOT-relative relocations that do not have explicit 3268 GOT entries. */ 3269 amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1; 3270 amt *= sizeof (bfd_signed_vma); 3271 local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt)); 3272 if (local_got_refcounts == NULL) 3273 return FALSE; 3274 3275 local_got_refcounts++; 3276 elf_local_got_refcounts (abfd) = local_got_refcounts; 3277 } 3278 break; 3279 3280 default: 3281 break; 3282 } 3283 3284 /* Some relocs require a global offset table (but perhaps not a 3285 specific GOT entry). */ 3286 switch (r_type) 3287 { 3288 case R_CRIS_16_DTPREL: 3289 case R_CRIS_32_DTPREL: 3290 /* Not requesting .got.rela for an executable: the contents 3291 of the first entry is constant there. For a shared 3292 library, we need .got.rela for the R_CRIS_DTPMOD 3293 relocation at index 3. */ 3294 if (!info->shared) 3295 break; 3296 /* Fall through. */ 3297 3298 case R_CRIS_32_IE: 3299 case R_CRIS_32_GD: 3300 case R_CRIS_16_GOT_GD: 3301 case R_CRIS_32_GOT_GD: 3302 case R_CRIS_32_GOT_TPREL: 3303 case R_CRIS_16_GOT_TPREL: 3304 /* Fall through. */ 3305 3306 /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT 3307 entry only for local symbols. Unfortunately, we don't know 3308 until later on if there's a version script that forces the 3309 symbol local. We must have the .rela.got section in place 3310 before we know if the symbol looks global now, so we need 3311 to treat the reloc just like for R_CRIS_16_GOT and 3312 R_CRIS_32_GOT. */ 3313 case R_CRIS_16_GOTPLT: 3314 case R_CRIS_32_GOTPLT: 3315 case R_CRIS_16_GOT: 3316 case R_CRIS_32_GOT: 3317 if (srelgot == NULL 3318 && (h != NULL || info->shared)) 3319 { 3320 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 3321 if (srelgot == NULL) 3322 { 3323 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 3324 | SEC_IN_MEMORY | SEC_LINKER_CREATED 3325 | SEC_READONLY); 3326 srelgot = bfd_make_section_anyway_with_flags (dynobj, 3327 ".rela.got", 3328 flags); 3329 if (srelgot == NULL 3330 || !bfd_set_section_alignment (dynobj, srelgot, 2)) 3331 return FALSE; 3332 } 3333 } 3334 break; 3335 3336 default: 3337 break; 3338 } 3339 3340 /* Warn and error for invalid input. */ 3341 switch (r_type) 3342 { 3343 case R_CRIS_32_IE: 3344 case R_CRIS_32_TPREL: 3345 case R_CRIS_16_TPREL: 3346 case R_CRIS_32_GD: 3347 if (info->shared) 3348 { 3349 (*_bfd_error_handler) 3350 (_("%B, section %A:\n relocation %s not valid" 3351 " in a shared object;" 3352 " typically an option mixup, recompile with -fPIC"), 3353 abfd, 3354 sec, 3355 cris_elf_howto_table[r_type].name); 3356 /* Don't return FALSE here; we want messages for all of 3357 these and the error behavior is ungraceful 3358 anyway. */ 3359 } 3360 default: 3361 break; 3362 } 3363 3364 switch (r_type) 3365 { 3366 case R_CRIS_32_GD: 3367 case R_CRIS_16_GOT_GD: 3368 case R_CRIS_32_GOT_GD: 3369 /* These are requests for tls_index entries, run-time R_CRIS_DTP. */ 3370 got_element_size = 8; 3371 r_symndx_lgot = LGOT_DTP_NDX (r_symndx); 3372 break; 3373 3374 case R_CRIS_16_DTPREL: 3375 case R_CRIS_32_DTPREL: 3376 /* These two just request for the constant-index 3377 module-local tls_index-sized GOT entry, which we add 3378 elsewhere. */ 3379 break; 3380 3381 case R_CRIS_32_IE: 3382 case R_CRIS_32_GOT_TPREL: 3383 case R_CRIS_16_GOT_TPREL: 3384 r_symndx_lgot = LGOT_TPREL_NDX (r_symndx); 3385 3386 /* Those relocs also require that a DSO is of type 3387 Initial Exec. Like other targets, we don't reset this 3388 flag even if the relocs are GC:ed away. */ 3389 if (info->shared) 3390 info->flags |= DF_STATIC_TLS; 3391 break; 3392 3393 /* Let's list the other assembler-generated TLS-relocs too, 3394 just to show that they're not forgotten. */ 3395 case R_CRIS_16_TPREL: 3396 case R_CRIS_32_TPREL: 3397 default: 3398 break; 3399 } 3400 3401 switch (r_type) 3402 { 3403 case R_CRIS_16_GOTPLT: 3404 case R_CRIS_32_GOTPLT: 3405 /* Mark that we need a GOT entry if the PLT entry (and its GOT 3406 entry) is eliminated. We can only do this for a non-local 3407 symbol. */ 3408 if (h != NULL) 3409 { 3410 elf_cris_hash_entry (h)->gotplt_refcount++; 3411 goto handle_gotplt_reloc; 3412 } 3413 /* If h is NULL then this is a local symbol, and we must make a 3414 GOT entry for it, so handle it like a GOT reloc. */ 3415 /* Fall through. */ 3416 3417 case R_CRIS_32_IE: 3418 case R_CRIS_32_GD: 3419 case R_CRIS_16_GOT_GD: 3420 case R_CRIS_32_GOT_GD: 3421 case R_CRIS_32_GOT_TPREL: 3422 case R_CRIS_16_GOT_TPREL: 3423 case R_CRIS_16_GOT: 3424 case R_CRIS_32_GOT: 3425 /* This symbol requires a global offset table entry. */ 3426 if (h != NULL) 3427 { 3428 if (h->got.refcount == 0) 3429 { 3430 /* Make sure this symbol is output as a dynamic symbol. */ 3431 if (h->dynindx == -1) 3432 { 3433 if (!bfd_elf_link_record_dynamic_symbol (info, h)) 3434 return FALSE; 3435 } 3436 } 3437 3438 /* Update the sum of reloc counts for this symbol. */ 3439 h->got.refcount++; 3440 3441 switch (r_type) 3442 { 3443 case R_CRIS_16_GOT: 3444 case R_CRIS_32_GOT: 3445 if (elf_cris_hash_entry (h)->reg_got_refcount == 0) 3446 { 3447 /* Allocate space in the .got section. */ 3448 sgot->size += got_element_size; 3449 /* Allocate relocation space. */ 3450 srelgot->size += sizeof (Elf32_External_Rela); 3451 } 3452 elf_cris_hash_entry (h)->reg_got_refcount++; 3453 break; 3454 3455 case R_CRIS_32_GD: 3456 case R_CRIS_16_GOT_GD: 3457 case R_CRIS_32_GOT_GD: 3458 if (elf_cris_hash_entry (h)->dtp_refcount == 0) 3459 { 3460 /* Allocate space in the .got section. */ 3461 sgot->size += got_element_size; 3462 /* Allocate relocation space. */ 3463 srelgot->size += sizeof (Elf32_External_Rela); 3464 } 3465 elf_cris_hash_entry (h)->dtp_refcount++; 3466 break; 3467 3468 case R_CRIS_32_IE: 3469 case R_CRIS_32_GOT_TPREL: 3470 case R_CRIS_16_GOT_TPREL: 3471 if (elf_cris_hash_entry (h)->tprel_refcount == 0) 3472 { 3473 /* Allocate space in the .got section. */ 3474 sgot->size += got_element_size; 3475 /* Allocate relocation space. */ 3476 srelgot->size += sizeof (Elf32_External_Rela); 3477 } 3478 elf_cris_hash_entry (h)->tprel_refcount++; 3479 break; 3480 3481 default: 3482 BFD_FAIL (); 3483 break; 3484 } 3485 } 3486 else 3487 { 3488 /* This is a global offset table entry for a local symbol. */ 3489 if (local_got_refcounts[r_symndx_lgot] == 0) 3490 { 3491 sgot->size += got_element_size; 3492 if (info->shared) 3493 { 3494 /* If we are generating a shared object, we need 3495 to output a R_CRIS_RELATIVE reloc so that the 3496 dynamic linker can adjust this GOT entry. 3497 Similarly for non-regular got entries. */ 3498 srelgot->size += sizeof (Elf32_External_Rela); 3499 } 3500 } 3501 /* Update the reloc-specific count. */ 3502 local_got_refcounts[r_symndx_lgot]++; 3503 3504 /* This one is the sum of all the others. */ 3505 local_got_refcounts[r_symndx]++; 3506 } 3507 break; 3508 3509 case R_CRIS_16_DTPREL: 3510 case R_CRIS_32_DTPREL: 3511 case R_CRIS_32_GOTREL: 3512 /* This reference requires a global offset table. 3513 FIXME: The actual refcount isn't used currently; the .got 3514 section can't be removed if there were any references in the 3515 input. */ 3516 local_got_refcounts[-1]++; 3517 break; 3518 3519 handle_gotplt_reloc: 3520 3521 case R_CRIS_32_PLT_GOTREL: 3522 /* This reference requires a global offset table. */ 3523 local_got_refcounts[-1]++; 3524 /* Fall through. */ 3525 3526 case R_CRIS_32_PLT_PCREL: 3527 /* This symbol requires a procedure linkage table entry. We 3528 actually build the entry in adjust_dynamic_symbol, 3529 because this might be a case of linking PIC code which is 3530 never referenced by a dynamic object, in which case we 3531 don't need to generate a procedure linkage table entry 3532 after all. */ 3533 3534 /* Beware: if we'd check for visibility of the symbol here 3535 (and not marking the need for a PLT when non-visible), we'd 3536 get into trouble with keeping handling consistent with 3537 regards to relocs found before definition and GOTPLT 3538 handling. Eliminable PLT entries will be dealt with later 3539 anyway. */ 3540 if (h == NULL) 3541 continue; 3542 3543 h->needs_plt = 1; 3544 h->plt.refcount++; 3545 break; 3546 3547 case R_CRIS_8: 3548 case R_CRIS_16: 3549 case R_CRIS_32: 3550 /* Let's help debug shared library creation. Any of these 3551 relocs *can* be used in shared libs, but pages containing 3552 them cannot be shared, so they're not appropriate for 3553 common use. Don't warn for sections we don't care about, 3554 such as debug sections or non-constant sections. We 3555 can't help tables of (global) function pointers, for 3556 example, though they must be emitted in a (writable) data 3557 section to avoid having impure text sections. */ 3558 if (info->shared 3559 && (sec->flags & SEC_ALLOC) != 0 3560 && (sec->flags & SEC_READONLY) != 0) 3561 { 3562 /* FIXME: How do we make this optionally a warning only? */ 3563 (*_bfd_error_handler) 3564 (_("%B, section %A:\n relocation %s should not" 3565 " be used in a shared object; recompile with -fPIC"), 3566 abfd, 3567 sec, 3568 cris_elf_howto_table[r_type].name); 3569 } 3570 3571 /* We don't need to handle relocs into sections not going into 3572 the "real" output. */ 3573 if ((sec->flags & SEC_ALLOC) == 0) 3574 break; 3575 3576 if (h != NULL) 3577 { 3578 h->non_got_ref = 1; 3579 3580 /* Make sure a plt entry is created for this symbol if it 3581 turns out to be a function defined by a dynamic object. */ 3582 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) 3583 h->plt.refcount++; 3584 } 3585 3586 /* If we are creating a shared library and this is not a local 3587 symbol, we need to copy the reloc into the shared library. 3588 However when linking with -Bsymbolic and this is a global 3589 symbol which is defined in an object we are including in the 3590 link (i.e., DEF_REGULAR is set), then we can resolve the 3591 reloc directly. At this point we have not seen all the input 3592 files, so it is possible that DEF_REGULAR is not set now but 3593 will be set later (it is never cleared). In case of a weak 3594 definition, DEF_REGULAR may be cleared later by a strong 3595 definition in a shared library. We account for that 3596 possibility below by storing information in the relocs_copied 3597 field of the hash table entry. A similar situation occurs 3598 when creating shared libraries and symbol visibility changes 3599 render the symbol local. */ 3600 3601 /* No need to do anything if we're not creating a shared object. */ 3602 if (! info->shared) 3603 break; 3604 3605 /* We may need to create a reloc section in the dynobj and made room 3606 for this reloc. */ 3607 if (sreloc == NULL) 3608 { 3609 sreloc = _bfd_elf_make_dynamic_reloc_section 3610 (sec, dynobj, 2, abfd, /*rela?*/ TRUE); 3611 3612 if (sreloc == NULL) 3613 return FALSE; 3614 } 3615 3616 if (sec->flags & SEC_READONLY) 3617 info->flags |= DF_TEXTREL; 3618 3619 sreloc->size += sizeof (Elf32_External_Rela); 3620 break; 3621 3622 case R_CRIS_8_PCREL: 3623 case R_CRIS_16_PCREL: 3624 case R_CRIS_32_PCREL: 3625 if (h != NULL) 3626 { 3627 h->non_got_ref = 1; 3628 3629 /* Make sure a plt entry is created for this symbol if it 3630 turns out to be a function defined by a dynamic object. */ 3631 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) 3632 h->plt.refcount++; 3633 } 3634 3635 /* If we are creating a shared library and this is not a local 3636 symbol, we need to copy the reloc into the shared library. 3637 However when linking with -Bsymbolic and this is a global 3638 symbol which is defined in an object we are including in the 3639 link (i.e., DEF_REGULAR is set), then we can resolve the 3640 reloc directly. At this point we have not seen all the input 3641 files, so it is possible that DEF_REGULAR is not set now but 3642 will be set later (it is never cleared). In case of a weak 3643 definition, DEF_REGULAR may be cleared later by a strong 3644 definition in a shared library. We account for that 3645 possibility below by storing information in the relocs_copied 3646 field of the hash table entry. A similar situation occurs 3647 when creating shared libraries and symbol visibility changes 3648 render the symbol local. */ 3649 3650 /* No need to do anything if we're not creating a shared object. */ 3651 if (! info->shared) 3652 break; 3653 3654 /* We don't need to handle relocs into sections not going into 3655 the "real" output. */ 3656 if ((sec->flags & SEC_ALLOC) == 0) 3657 break; 3658 3659 /* If the symbol is local, then we know already we can 3660 eliminate the reloc. */ 3661 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 3662 break; 3663 3664 /* If this is with -Bsymbolic and the symbol isn't weak, and 3665 is defined by an ordinary object (the ones we include in 3666 this shared library) then we can also eliminate the 3667 reloc. See comment above for more eliminable cases which 3668 we can't identify at this time. */ 3669 if (info->symbolic 3670 && h->root.type != bfd_link_hash_defweak 3671 && h->def_regular) 3672 break; 3673 3674 /* We may need to create a reloc section in the dynobj and made room 3675 for this reloc. */ 3676 if (sreloc == NULL) 3677 { 3678 sreloc = _bfd_elf_make_dynamic_reloc_section 3679 (sec, dynobj, 2, abfd, /*rela?*/ TRUE); 3680 3681 if (sreloc == NULL) 3682 return FALSE; 3683 } 3684 3685 sreloc->size += sizeof (Elf32_External_Rela); 3686 3687 /* We count the number of PC relative relocations we have 3688 entered for this symbol, so that we can discard them 3689 again if the symbol is later defined by a regular object. 3690 We know that h is really a pointer to an 3691 elf_cris_link_hash_entry. */ 3692 { 3693 struct elf_cris_link_hash_entry *eh; 3694 struct elf_cris_pcrel_relocs_copied *p; 3695 3696 eh = elf_cris_hash_entry (h); 3697 3698 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) 3699 if (p->section == sec) 3700 break; 3701 3702 if (p == NULL) 3703 { 3704 p = ((struct elf_cris_pcrel_relocs_copied *) 3705 bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); 3706 if (p == NULL) 3707 return FALSE; 3708 p->next = eh->pcrel_relocs_copied; 3709 eh->pcrel_relocs_copied = p; 3710 p->section = sec; 3711 p->count = 0; 3712 p->r_type = r_type; 3713 } 3714 3715 ++p->count; 3716 } 3717 break; 3718 3719 /* This relocation describes the C++ object vtable hierarchy. 3720 Reconstruct it for later use during GC. */ 3721 case R_CRIS_GNU_VTINHERIT: 3722 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 3723 return FALSE; 3724 break; 3725 3726 /* This relocation describes which C++ vtable entries are actually 3727 used. Record for later use during GC. */ 3728 case R_CRIS_GNU_VTENTRY: 3729 BFD_ASSERT (h != NULL); 3730 if (h != NULL 3731 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 3732 return FALSE; 3733 break; 3734 3735 case R_CRIS_16_TPREL: 3736 case R_CRIS_32_TPREL: 3737 /* Already warned above, when necessary. */ 3738 break; 3739 3740 default: 3741 /* Other relocs do not appear here. */ 3742 bfd_set_error (bfd_error_bad_value); 3743 return FALSE; 3744 } 3745 } 3746 3747 return TRUE; 3748 } 3749 3750 /* Set the sizes of the dynamic sections. */ 3751 3752 static bfd_boolean 3753 elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 3754 struct bfd_link_info *info) 3755 { 3756 struct elf_cris_link_hash_table * htab; 3757 bfd *dynobj; 3758 asection *s; 3759 bfd_boolean plt; 3760 bfd_boolean relocs; 3761 3762 htab = elf_cris_hash_table (info); 3763 if (htab == NULL) 3764 return FALSE; 3765 3766 dynobj = elf_hash_table (info)->dynobj; 3767 BFD_ASSERT (dynobj != NULL); 3768 3769 if (elf_hash_table (info)->dynamic_sections_created) 3770 { 3771 /* Set the contents of the .interp section to the interpreter. */ 3772 if (info->executable) 3773 { 3774 s = bfd_get_linker_section (dynobj, ".interp"); 3775 BFD_ASSERT (s != NULL); 3776 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 3777 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 3778 } 3779 } 3780 else 3781 { 3782 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */ 3783 elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got, 3784 info); 3785 3786 /* We may have created entries in the .rela.got section. 3787 However, if we are not creating the dynamic sections, we will 3788 not actually use these entries. Reset the size of .rela.got, 3789 which will cause it to get stripped from the output file 3790 below. */ 3791 s = bfd_get_linker_section (dynobj, ".rela.got"); 3792 if (s != NULL) 3793 s->size = 0; 3794 } 3795 3796 /* If this is a -Bsymbolic shared link, then we need to discard all PC 3797 relative relocs against symbols defined in a regular object. We 3798 allocated space for them in the check_relocs routine, but we will not 3799 fill them in in the relocate_section routine. We also discard space 3800 for relocs that have become for local symbols due to symbol 3801 visibility changes. For programs, we discard space for relocs for 3802 symbols not referenced by any dynamic object. */ 3803 if (info->shared) 3804 elf_cris_link_hash_traverse (htab, 3805 elf_cris_discard_excess_dso_dynamics, 3806 info); 3807 else 3808 elf_cris_link_hash_traverse (htab, 3809 elf_cris_discard_excess_program_dynamics, 3810 info); 3811 3812 /* The check_relocs and adjust_dynamic_symbol entry points have 3813 determined the sizes of the various dynamic sections. Allocate 3814 memory for them. */ 3815 plt = FALSE; 3816 relocs = FALSE; 3817 for (s = dynobj->sections; s != NULL; s = s->next) 3818 { 3819 const char *name; 3820 3821 if ((s->flags & SEC_LINKER_CREATED) == 0) 3822 continue; 3823 3824 /* It's OK to base decisions on the section name, because none 3825 of the dynobj section names depend upon the input files. */ 3826 name = bfd_get_section_name (dynobj, s); 3827 3828 if (strcmp (name, ".plt") == 0) 3829 { 3830 /* Remember whether there is a PLT. */ 3831 plt = s->size != 0; 3832 } 3833 else if (strcmp (name, ".got.plt") == 0) 3834 { 3835 /* The .got.plt contains the .got header as well as the 3836 actual .got.plt contents. The .got header may contain a 3837 R_CRIS_DTPMOD entry at index 3. */ 3838 s->size += htab->dtpmod_refcount != 0 3839 ? 8 : 0; 3840 } 3841 else if (CONST_STRNEQ (name, ".rela")) 3842 { 3843 if (strcmp (name, ".rela.got") == 0 3844 && htab->dtpmod_refcount != 0 3845 && info->shared) 3846 s->size += sizeof (Elf32_External_Rela); 3847 3848 if (s->size != 0) 3849 { 3850 /* Remember whether there are any reloc sections other 3851 than .rela.plt. */ 3852 if (strcmp (name, ".rela.plt") != 0) 3853 relocs = TRUE; 3854 3855 /* We use the reloc_count field as a counter if we need 3856 to copy relocs into the output file. */ 3857 s->reloc_count = 0; 3858 } 3859 } 3860 else if (! CONST_STRNEQ (name, ".got") 3861 && strcmp (name, ".dynbss") != 0) 3862 { 3863 /* It's not one of our sections, so don't allocate space. */ 3864 continue; 3865 } 3866 3867 if (s->size == 0) 3868 { 3869 /* If we don't need this section, strip it from the 3870 output file. This is mostly to handle .rela.bss and 3871 .rela.plt. We must create both sections in 3872 create_dynamic_sections, because they must be created 3873 before the linker maps input sections to output 3874 sections. The linker does that before 3875 adjust_dynamic_symbol is called, and it is that 3876 function which decides whether anything needs to go 3877 into these sections. */ 3878 s->flags |= SEC_EXCLUDE; 3879 continue; 3880 } 3881 3882 if ((s->flags & SEC_HAS_CONTENTS) == 0) 3883 continue; 3884 3885 /* Allocate memory for the section contents. We use bfd_zalloc here 3886 in case unused entries are not reclaimed before the section's 3887 contents are written out. This should not happen, but this way 3888 if it does, we will not write out garbage. For reloc sections, 3889 this will make entries have the type R_CRIS_NONE. */ 3890 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 3891 if (s->contents == NULL) 3892 return FALSE; 3893 } 3894 3895 if (elf_hash_table (info)->dynamic_sections_created) 3896 { 3897 /* Add some entries to the .dynamic section. We fill in the 3898 values later, in elf_cris_finish_dynamic_sections, but we 3899 must add the entries now so that we get the correct size for 3900 the .dynamic section. The DT_DEBUG entry is filled in by the 3901 dynamic linker and used by the debugger. */ 3902 #define add_dynamic_entry(TAG, VAL) \ 3903 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 3904 3905 if (!info->shared) 3906 { 3907 if (!add_dynamic_entry (DT_DEBUG, 0)) 3908 return FALSE; 3909 } 3910 3911 if (plt) 3912 { 3913 if (!add_dynamic_entry (DT_PLTGOT, 0) 3914 || !add_dynamic_entry (DT_PLTRELSZ, 0) 3915 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 3916 || !add_dynamic_entry (DT_JMPREL, 0)) 3917 return FALSE; 3918 } 3919 3920 if (relocs) 3921 { 3922 if (!add_dynamic_entry (DT_RELA, 0) 3923 || !add_dynamic_entry (DT_RELASZ, 0) 3924 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 3925 return FALSE; 3926 } 3927 3928 if ((info->flags & DF_TEXTREL) != 0) 3929 { 3930 if (!add_dynamic_entry (DT_TEXTREL, 0)) 3931 return FALSE; 3932 info->flags |= DF_TEXTREL; 3933 } 3934 } 3935 #undef add_dynamic_entry 3936 3937 return TRUE; 3938 } 3939 3940 /* This function is called via elf_cris_link_hash_traverse if we are 3941 creating a shared object. In the -Bsymbolic case, it discards the 3942 space allocated to copy PC relative relocs against symbols which 3943 are defined in regular objects. For the normal non-symbolic case, 3944 we also discard space for relocs that have become local due to 3945 symbol visibility changes. We allocated space for them in the 3946 check_relocs routine, but we won't fill them in in the 3947 relocate_section routine. */ 3948 3949 static bfd_boolean 3950 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *h, 3951 void * inf) 3952 { 3953 struct elf_cris_pcrel_relocs_copied *s; 3954 struct bfd_link_info *info = (struct bfd_link_info *) inf; 3955 3956 /* If a symbol has been forced local or we have found a regular 3957 definition for the symbolic link case, then we won't be needing 3958 any relocs. */ 3959 if (h->root.def_regular 3960 && (h->root.forced_local 3961 || info->symbolic)) 3962 { 3963 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) 3964 { 3965 asection *sreloc 3966 = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info) 3967 ->dynobj, 3968 s->section, 3969 /*rela?*/ TRUE); 3970 sreloc->size -= s->count * sizeof (Elf32_External_Rela); 3971 } 3972 return TRUE; 3973 } 3974 3975 /* If we have accounted for PC-relative relocs for read-only 3976 sections, now is the time to warn for them. We can't do it in 3977 cris_elf_check_relocs, because we don't know the status of all 3978 symbols at that time (and it's common to force symbols local 3979 late). */ 3980 3981 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) 3982 if ((s->section->flags & SEC_READONLY) != 0) 3983 { 3984 /* FIXME: How do we make this optionally a warning only? */ 3985 (*_bfd_error_handler) 3986 (_("%B, section `%A', to symbol `%s':\n" 3987 " relocation %s should not be used" 3988 " in a shared object; recompile with -fPIC"), 3989 s->section->owner, 3990 s->section, 3991 h->root.root.root.string, 3992 cris_elf_howto_table[s->r_type].name); 3993 3994 info->flags |= DF_TEXTREL; 3995 } 3996 3997 return TRUE; 3998 } 3999 4000 /* This function is called via elf_cris_link_hash_traverse if we are *not* 4001 creating a shared object. We discard space for relocs for symbols put 4002 in the .got, but which we found we do not have to resolve at run-time. */ 4003 4004 static bfd_boolean 4005 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *h, 4006 void * inf) 4007 { 4008 struct bfd_link_info *info = (struct bfd_link_info *) inf; 4009 4010 /* If we're not creating a shared library and have a symbol which is 4011 referred to by .got references, but the symbol is defined locally, 4012 (or rather, not defined by a DSO) then lose the reloc for the .got 4013 (don't allocate room for it). Likewise for relocs for something 4014 for which we create a PLT. */ 4015 if (!h->root.def_dynamic 4016 || h->root.plt.refcount > 0) 4017 { 4018 if (h->reg_got_refcount > 0 4019 /* The size of this section is only valid and in sync with the 4020 various reference counts if we do dynamic; don't decrement it 4021 otherwise. */ 4022 && elf_hash_table (info)->dynamic_sections_created) 4023 { 4024 bfd *dynobj = elf_hash_table (info)->dynobj; 4025 asection *srelgot; 4026 4027 BFD_ASSERT (dynobj != NULL); 4028 4029 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 4030 4031 BFD_ASSERT (srelgot != NULL); 4032 4033 srelgot->size -= sizeof (Elf32_External_Rela); 4034 } 4035 4036 /* If the locally-defined symbol isn't used by a DSO, then we don't 4037 have to export it as a dynamic symbol. This was already done for 4038 functions; doing this for all symbols would presumably not 4039 introduce new problems. Of course we don't do this if we're 4040 exporting all dynamic symbols. */ 4041 if (! info->export_dynamic 4042 && h->root.dynindx != -1 4043 && !h->root.def_dynamic 4044 && !h->root.ref_dynamic) 4045 { 4046 h->root.dynindx = -1; 4047 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 4048 h->root.dynstr_index); 4049 } 4050 } 4051 4052 return TRUE; 4053 } 4054 4055 /* Reject a file depending on presence and expectation of prefixed 4056 underscores on symbols. */ 4057 4058 static bfd_boolean 4059 cris_elf_object_p (bfd *abfd) 4060 { 4061 if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags)) 4062 return FALSE; 4063 4064 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)) 4065 return (bfd_get_symbol_leading_char (abfd) == '_'); 4066 else 4067 return (bfd_get_symbol_leading_char (abfd) == 0); 4068 } 4069 4070 /* Mark presence or absence of leading underscore. Set machine type 4071 flags from mach type. */ 4072 4073 static void 4074 cris_elf_final_write_processing (bfd *abfd, 4075 bfd_boolean linker ATTRIBUTE_UNUSED) 4076 { 4077 unsigned long e_flags = elf_elfheader (abfd)->e_flags; 4078 4079 e_flags &= ~EF_CRIS_UNDERSCORE; 4080 if (bfd_get_symbol_leading_char (abfd) == '_') 4081 e_flags |= EF_CRIS_UNDERSCORE; 4082 4083 switch (bfd_get_mach (abfd)) 4084 { 4085 case bfd_mach_cris_v0_v10: 4086 e_flags |= EF_CRIS_VARIANT_ANY_V0_V10; 4087 break; 4088 4089 case bfd_mach_cris_v10_v32: 4090 e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32; 4091 break; 4092 4093 case bfd_mach_cris_v32: 4094 e_flags |= EF_CRIS_VARIANT_V32; 4095 break; 4096 4097 default: 4098 _bfd_abort (__FILE__, __LINE__, 4099 _("Unexpected machine number")); 4100 } 4101 4102 elf_elfheader (abfd)->e_flags = e_flags; 4103 } 4104 4105 /* Set the mach type from e_flags value. */ 4106 4107 static bfd_boolean 4108 cris_elf_set_mach_from_flags (bfd *abfd, 4109 unsigned long flags) 4110 { 4111 switch (flags & EF_CRIS_VARIANT_MASK) 4112 { 4113 case EF_CRIS_VARIANT_ANY_V0_V10: 4114 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10); 4115 break; 4116 4117 case EF_CRIS_VARIANT_V32: 4118 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32); 4119 break; 4120 4121 case EF_CRIS_VARIANT_COMMON_V10_V32: 4122 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32); 4123 break; 4124 4125 default: 4126 /* Since we don't recognize them, we obviously can't support them 4127 with this code; we'd have to require that all future handling 4128 would be optional. */ 4129 bfd_set_error (bfd_error_wrong_format); 4130 return FALSE; 4131 } 4132 4133 return TRUE; 4134 } 4135 4136 /* Display the flags field. */ 4137 4138 static bfd_boolean 4139 cris_elf_print_private_bfd_data (bfd *abfd, void * ptr) 4140 { 4141 FILE *file = (FILE *) ptr; 4142 4143 BFD_ASSERT (abfd != NULL && ptr != NULL); 4144 4145 _bfd_elf_print_private_bfd_data (abfd, ptr); 4146 4147 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); 4148 4149 if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE) 4150 fprintf (file, _(" [symbols have a _ prefix]")); 4151 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK) 4152 == EF_CRIS_VARIANT_COMMON_V10_V32) 4153 fprintf (file, _(" [v10 and v32]")); 4154 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK) 4155 == EF_CRIS_VARIANT_V32) 4156 fprintf (file, _(" [v32]")); 4157 4158 fputc ('\n', file); 4159 return TRUE; 4160 } 4161 4162 /* Don't mix files with and without a leading underscore. */ 4163 4164 static bfd_boolean 4165 cris_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 4166 { 4167 int imach, omach; 4168 4169 if (! _bfd_generic_verify_endian_match (ibfd, obfd)) 4170 return FALSE; 4171 4172 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 4173 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 4174 return TRUE; 4175 4176 imach = bfd_get_mach (ibfd); 4177 4178 if (! elf_flags_init (obfd)) 4179 { 4180 /* This happens when ld starts out with a 'blank' output file. */ 4181 elf_flags_init (obfd) = TRUE; 4182 4183 /* We ignore the linker-set mach, and instead set it according to 4184 the first input file. This would also happen if we could 4185 somehow filter out the OUTPUT_ARCH () setting from elf.sc. 4186 This allows us to keep the same linker config across 4187 cris(v0..v10) and crisv32. The drawback is that we can't force 4188 the output type, which might be a sane thing to do for a 4189 v10+v32 compatibility object. */ 4190 if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach)) 4191 return FALSE; 4192 } 4193 4194 if (bfd_get_symbol_leading_char (ibfd) 4195 != bfd_get_symbol_leading_char (obfd)) 4196 { 4197 (*_bfd_error_handler) 4198 (bfd_get_symbol_leading_char (ibfd) == '_' 4199 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols") 4200 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"), 4201 ibfd); 4202 bfd_set_error (bfd_error_bad_value); 4203 return FALSE; 4204 } 4205 4206 omach = bfd_get_mach (obfd); 4207 4208 if (imach != omach) 4209 { 4210 /* We can get an incompatible combination only if either is 4211 bfd_mach_cris_v32, and the other one isn't compatible. */ 4212 if ((imach == bfd_mach_cris_v32 4213 && omach != bfd_mach_cris_v10_v32) 4214 || (omach == bfd_mach_cris_v32 4215 && imach != bfd_mach_cris_v10_v32)) 4216 { 4217 (*_bfd_error_handler) 4218 ((imach == bfd_mach_cris_v32) 4219 ? _("%B contains CRIS v32 code, incompatible" 4220 " with previous objects") 4221 : _("%B contains non-CRIS-v32 code, incompatible" 4222 " with previous objects"), 4223 ibfd); 4224 bfd_set_error (bfd_error_bad_value); 4225 return FALSE; 4226 } 4227 4228 /* We don't have to check the case where the input is compatible 4229 with v10 and v32, because the output is already known to be set 4230 to the other (compatible) mach. */ 4231 if (omach == bfd_mach_cris_v10_v32 4232 && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach)) 4233 return FALSE; 4234 } 4235 4236 return TRUE; 4237 } 4238 4239 /* Do side-effects of e_flags copying to obfd. */ 4240 4241 static bfd_boolean 4242 cris_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) 4243 { 4244 /* Call the base function. */ 4245 if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd)) 4246 return FALSE; 4247 4248 /* If output is big-endian for some obscure reason, stop here. */ 4249 if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE) 4250 return FALSE; 4251 4252 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 4253 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 4254 return TRUE; 4255 4256 /* Do what we really came here for. */ 4257 return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd)); 4258 } 4259 4260 static enum elf_reloc_type_class 4261 elf_cris_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 4262 const asection *rel_sec ATTRIBUTE_UNUSED, 4263 const Elf_Internal_Rela *rela) 4264 { 4265 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info); 4266 switch (r_type) 4267 { 4268 case R_CRIS_RELATIVE: 4269 return reloc_class_relative; 4270 case R_CRIS_JUMP_SLOT: 4271 return reloc_class_plt; 4272 case R_CRIS_COPY: 4273 return reloc_class_copy; 4274 default: 4275 return reloc_class_normal; 4276 } 4277 } 4278 4279 /* The elf_backend_got_elt_size worker. For one symbol, we can have up to 4280 two GOT entries from three types with two different sizes. We handle 4281 it as a single entry, so we can use the regular offset-calculation 4282 machinery. */ 4283 4284 static bfd_vma 4285 elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED, 4286 struct bfd_link_info *info ATTRIBUTE_UNUSED, 4287 struct elf_link_hash_entry *hr, 4288 bfd *ibfd, 4289 unsigned long symndx) 4290 { 4291 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr; 4292 bfd_vma eltsiz = 0; 4293 4294 /* We may have one regular GOT entry or up to two TLS GOT 4295 entries. */ 4296 if (h == NULL) 4297 { 4298 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 4299 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd); 4300 4301 BFD_ASSERT (local_got_refcounts != NULL); 4302 4303 if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0) 4304 { 4305 /* We can't have a variable referred to both as a regular 4306 variable and through TLS relocs. */ 4307 BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0 4308 && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0); 4309 return 4; 4310 } 4311 4312 if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0) 4313 eltsiz += 8; 4314 4315 if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0) 4316 eltsiz += 4; 4317 } 4318 else 4319 { 4320 struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h); 4321 if (hh->reg_got_refcount > 0) 4322 { 4323 /* The actual error-on-input is emitted elsewhere. */ 4324 BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0); 4325 return 4; 4326 } 4327 4328 if (hh->dtp_refcount > 0) 4329 eltsiz += 8; 4330 4331 if (hh->tprel_refcount > 0) 4332 eltsiz += 4; 4333 } 4334 4335 /* We're only called when h->got.refcount is non-zero, so we must 4336 have a non-zero size. */ 4337 BFD_ASSERT (eltsiz != 0); 4338 return eltsiz; 4339 } 4340 4341 #define ELF_ARCH bfd_arch_cris 4343 #define ELF_TARGET_ID CRIS_ELF_DATA 4344 #define ELF_MACHINE_CODE EM_CRIS 4345 #define ELF_MAXPAGESIZE 0x2000 4346 4347 #define TARGET_LITTLE_SYM cris_elf32_vec 4348 #define TARGET_LITTLE_NAME "elf32-cris" 4349 #define elf_symbol_leading_char 0 4350 4351 #define elf_info_to_howto_rel NULL 4352 #define elf_info_to_howto cris_info_to_howto_rela 4353 #define elf_backend_relocate_section cris_elf_relocate_section 4354 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook 4355 #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook 4356 #define elf_backend_plt_sym_val cris_elf_plt_sym_val 4357 #define elf_backend_check_relocs cris_elf_check_relocs 4358 #define elf_backend_grok_prstatus cris_elf_grok_prstatus 4359 #define elf_backend_grok_psinfo cris_elf_grok_psinfo 4360 4361 #define elf_backend_can_gc_sections 1 4362 #define elf_backend_can_refcount 1 4363 4364 #define elf_backend_object_p cris_elf_object_p 4365 #define elf_backend_final_write_processing \ 4366 cris_elf_final_write_processing 4367 #define bfd_elf32_bfd_print_private_bfd_data \ 4368 cris_elf_print_private_bfd_data 4369 #define bfd_elf32_bfd_merge_private_bfd_data \ 4370 cris_elf_merge_private_bfd_data 4371 #define bfd_elf32_bfd_copy_private_bfd_data \ 4372 cris_elf_copy_private_bfd_data 4373 4374 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup 4375 #define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup 4376 4377 #define bfd_elf32_bfd_link_hash_table_create \ 4378 elf_cris_link_hash_table_create 4379 #define elf_backend_adjust_dynamic_symbol \ 4380 elf_cris_adjust_dynamic_symbol 4381 #define elf_backend_copy_indirect_symbol \ 4382 elf_cris_copy_indirect_symbol 4383 #define elf_backend_size_dynamic_sections \ 4384 elf_cris_size_dynamic_sections 4385 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 4386 #define elf_backend_finish_dynamic_symbol \ 4387 elf_cris_finish_dynamic_symbol 4388 #define elf_backend_finish_dynamic_sections \ 4389 elf_cris_finish_dynamic_sections 4390 #define elf_backend_create_dynamic_sections \ 4391 _bfd_elf_create_dynamic_sections 4392 #define bfd_elf32_bfd_final_link \ 4393 bfd_elf_gc_common_final_link 4394 #define elf_backend_hide_symbol elf_cris_hide_symbol 4395 #define elf_backend_reloc_type_class elf_cris_reloc_type_class 4396 4397 #define elf_backend_want_got_plt 1 4398 #define elf_backend_plt_readonly 1 4399 #define elf_backend_want_plt_sym 0 4400 #define elf_backend_got_header_size 12 4401 #define elf_backend_got_elt_size elf_cris_got_elt_size 4402 4403 /* Later, we my want to optimize RELA entries into REL entries for dynamic 4404 linking and libraries (if it's a win of any significance). Until then, 4405 take the easy route. */ 4406 #define elf_backend_may_use_rel_p 0 4407 #define elf_backend_may_use_rela_p 1 4408 #define elf_backend_rela_normal 1 4409 4410 #include "elf32-target.h" 4411 4412 #undef TARGET_LITTLE_SYM 4413 #undef TARGET_LITTLE_NAME 4414 #undef elf_symbol_leading_char 4415 4416 #define TARGET_LITTLE_SYM cris_elf32_us_vec 4417 #define TARGET_LITTLE_NAME "elf32-us-cris" 4418 #define elf_symbol_leading_char '_' 4419 #undef elf32_bed 4420 #define elf32_bed elf32_us_cris_bed 4421 4422 #include "elf32-target.h" 4423
