1 /* CRIS-specific support for 32-bit ELF. 2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 3 2010, 2011, 2012 Free Software Foundation, Inc. 4 Contributed by Axis Communications AB. 5 Written by Hans-Peter Nilsson, based on elf32-fr30.c 6 PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c. 7 8 This file is part of BFD, the Binary File Descriptor library. 9 10 This program is free software; you can redistribute it and/or modify 11 it under the terms of the GNU General Public License as published by 12 the Free Software Foundation; either version 3 of the License, or 13 (at your option) any later version. 14 15 This program is distributed in the hope that it will be useful, 16 but WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 GNU General Public License for more details. 19 20 You should have received a copy of the GNU General Public License 21 along with this program; if not, write to the Free Software 22 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 23 MA 02110-1301, USA. */ 24 25 #include "sysdep.h" 26 #include "bfd.h" 27 #include "libbfd.h" 28 #include "elf-bfd.h" 29 #include "elf/cris.h" 30 #include <limits.h> 31 32 bfd_reloc_status_type 33 cris_elf_pcrel_reloc (bfd *, arelent *, asymbol *, void *, 34 asection *, bfd *, char **); 35 static bfd_boolean 36 cris_elf_set_mach_from_flags (bfd *, unsigned long); 37 38 /* Forward declarations. */ 39 static reloc_howto_type cris_elf_howto_table [] = 40 { 41 /* This reloc does nothing. */ 42 HOWTO (R_CRIS_NONE, /* type */ 43 0, /* rightshift */ 44 2, /* size (0 = byte, 1 = short, 2 = long) */ 45 32, /* bitsize */ 46 FALSE, /* pc_relative */ 47 0, /* bitpos */ 48 complain_overflow_bitfield, /* complain_on_overflow */ 49 bfd_elf_generic_reloc, /* special_function */ 50 "R_CRIS_NONE", /* name */ 51 FALSE, /* partial_inplace */ 52 0, /* src_mask */ 53 0, /* dst_mask */ 54 FALSE), /* pcrel_offset */ 55 56 /* An 8 bit absolute relocation. */ 57 HOWTO (R_CRIS_8, /* type */ 58 0, /* rightshift */ 59 0, /* size (0 = byte, 1 = short, 2 = long) */ 60 8, /* bitsize */ 61 FALSE, /* pc_relative */ 62 0, /* bitpos */ 63 complain_overflow_bitfield, /* complain_on_overflow */ 64 bfd_elf_generic_reloc, /* special_function */ 65 "R_CRIS_8", /* name */ 66 FALSE, /* partial_inplace */ 67 0x0000, /* src_mask */ 68 0x00ff, /* dst_mask */ 69 FALSE), /* pcrel_offset */ 70 71 /* A 16 bit absolute relocation. */ 72 HOWTO (R_CRIS_16, /* type */ 73 0, /* rightshift */ 74 1, /* size (0 = byte, 1 = short, 2 = long) */ 75 16, /* bitsize */ 76 FALSE, /* pc_relative */ 77 0, /* bitpos */ 78 complain_overflow_bitfield, /* complain_on_overflow */ 79 bfd_elf_generic_reloc, /* special_function */ 80 "R_CRIS_16", /* name */ 81 FALSE, /* partial_inplace */ 82 0x00000000, /* src_mask */ 83 0x0000ffff, /* dst_mask */ 84 FALSE), /* pcrel_offset */ 85 86 /* A 32 bit absolute relocation. */ 87 HOWTO (R_CRIS_32, /* type */ 88 0, /* rightshift */ 89 2, /* size (0 = byte, 1 = short, 2 = long) */ 90 32, /* bitsize */ 91 FALSE, /* pc_relative */ 92 0, /* bitpos */ 93 /* We don't want overflow complaints for 64-bit vma builds 94 for e.g. sym+0x40000000 (or actually sym-0xc0000000 in 95 32-bit ELF) where sym=0xc0001234. 96 Don't do this for the PIC relocs, as we don't expect to 97 see them with large offsets. */ 98 complain_overflow_dont, /* complain_on_overflow */ 99 bfd_elf_generic_reloc, /* special_function */ 100 "R_CRIS_32", /* name */ 101 FALSE, /* partial_inplace */ 102 0x00000000, /* src_mask */ 103 0xffffffff, /* dst_mask */ 104 FALSE), /* pcrel_offset */ 105 106 /* An 8 bit PC-relative relocation. */ 107 HOWTO (R_CRIS_8_PCREL, /* type */ 108 0, /* rightshift */ 109 0, /* size (0 = byte, 1 = short, 2 = long) */ 110 8, /* bitsize */ 111 TRUE, /* pc_relative */ 112 0, /* bitpos */ 113 complain_overflow_bitfield, /* complain_on_overflow */ 114 cris_elf_pcrel_reloc, /* special_function */ 115 "R_CRIS_8_PCREL", /* name */ 116 FALSE, /* partial_inplace */ 117 0x0000, /* src_mask */ 118 0x00ff, /* dst_mask */ 119 TRUE), /* pcrel_offset */ 120 121 /* A 16 bit PC-relative relocation. */ 122 HOWTO (R_CRIS_16_PCREL, /* type */ 123 0, /* rightshift */ 124 1, /* size (0 = byte, 1 = short, 2 = long) */ 125 16, /* bitsize */ 126 TRUE, /* pc_relative */ 127 0, /* bitpos */ 128 complain_overflow_bitfield, /* complain_on_overflow */ 129 cris_elf_pcrel_reloc, /* special_function */ 130 "R_CRIS_16_PCREL", /* name */ 131 FALSE, /* partial_inplace */ 132 0x00000000, /* src_mask */ 133 0x0000ffff, /* dst_mask */ 134 TRUE), /* pcrel_offset */ 135 136 /* A 32 bit PC-relative relocation. */ 137 HOWTO (R_CRIS_32_PCREL, /* type */ 138 0, /* rightshift */ 139 2, /* size (0 = byte, 1 = short, 2 = long) */ 140 32, /* bitsize */ 141 TRUE, /* pc_relative */ 142 0, /* bitpos */ 143 complain_overflow_bitfield, /* complain_on_overflow */ 144 cris_elf_pcrel_reloc, /* special_function */ 145 "R_CRIS_32_PCREL", /* name */ 146 FALSE, /* partial_inplace */ 147 0x00000000, /* src_mask */ 148 0xffffffff, /* dst_mask */ 149 TRUE), /* pcrel_offset */ 150 151 /* GNU extension to record C++ vtable hierarchy. */ 152 HOWTO (R_CRIS_GNU_VTINHERIT, /* type */ 153 0, /* rightshift */ 154 2, /* size (0 = byte, 1 = short, 2 = long) */ 155 0, /* bitsize */ 156 FALSE, /* pc_relative */ 157 0, /* bitpos */ 158 complain_overflow_dont, /* complain_on_overflow */ 159 NULL, /* special_function */ 160 "R_CRIS_GNU_VTINHERIT", /* name */ 161 FALSE, /* partial_inplace */ 162 0, /* src_mask */ 163 0, /* dst_mask */ 164 FALSE), /* pcrel_offset */ 165 166 /* GNU extension to record C++ vtable member usage. */ 167 HOWTO (R_CRIS_GNU_VTENTRY, /* type */ 168 0, /* rightshift */ 169 2, /* size (0 = byte, 1 = short, 2 = long) */ 170 0, /* bitsize */ 171 FALSE, /* pc_relative */ 172 0, /* bitpos */ 173 complain_overflow_dont, /* complain_on_overflow */ 174 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 175 "R_CRIS_GNU_VTENTRY", /* name */ 176 FALSE, /* partial_inplace */ 177 0, /* src_mask */ 178 0, /* dst_mask */ 179 FALSE), /* pcrel_offset */ 180 181 /* This is used only by the dynamic linker. The symbol should exist 182 both in the object being run and in some shared library. The 183 dynamic linker copies the data addressed by the symbol from the 184 shared library into the object, because the object being 185 run has to have the data at some particular address. */ 186 HOWTO (R_CRIS_COPY, /* type */ 187 0, /* rightshift */ 188 2, /* size (0 = byte, 1 = short, 2 = long) */ 189 32, /* bitsize */ 190 FALSE, /* pc_relative */ 191 0, /* bitpos */ 192 complain_overflow_bitfield, /* complain_on_overflow */ 193 bfd_elf_generic_reloc, /* special_function */ 194 "R_CRIS_COPY", /* name */ 195 FALSE, /* partial_inplace */ 196 0, /* src_mask */ 197 0, /* dst_mask */ 198 FALSE), /* pcrel_offset */ 199 200 /* Like R_CRIS_32, but used when setting global offset table entries. */ 201 HOWTO (R_CRIS_GLOB_DAT, /* type */ 202 0, /* rightshift */ 203 2, /* size (0 = byte, 1 = short, 2 = long) */ 204 32, /* bitsize */ 205 FALSE, /* pc_relative */ 206 0, /* bitpos */ 207 complain_overflow_bitfield, /* complain_on_overflow */ 208 bfd_elf_generic_reloc, /* special_function */ 209 "R_CRIS_GLOB_DAT", /* name */ 210 FALSE, /* partial_inplace */ 211 0, /* src_mask */ 212 0xffffffff, /* dst_mask */ 213 FALSE), /* pcrel_offset */ 214 215 /* Marks a procedure linkage table entry for a symbol. */ 216 HOWTO (R_CRIS_JUMP_SLOT, /* type */ 217 0, /* rightshift */ 218 2, /* size (0 = byte, 1 = short, 2 = long) */ 219 32, /* bitsize */ 220 FALSE, /* pc_relative */ 221 0, /* bitpos */ 222 complain_overflow_bitfield, /* complain_on_overflow */ 223 bfd_elf_generic_reloc, /* special_function */ 224 "R_CRIS_JUMP_SLOT", /* name */ 225 FALSE, /* partial_inplace */ 226 0, /* src_mask */ 227 0, /* dst_mask */ 228 FALSE), /* pcrel_offset */ 229 230 /* Used only by the dynamic linker. When the object is run, this 231 longword is set to the load address of the object, plus the 232 addend. */ 233 HOWTO (R_CRIS_RELATIVE, /* type */ 234 0, /* rightshift */ 235 2, /* size (0 = byte, 1 = short, 2 = long) */ 236 32, /* bitsize */ 237 FALSE, /* pc_relative */ 238 0, /* bitpos */ 239 complain_overflow_bitfield, /* complain_on_overflow */ 240 bfd_elf_generic_reloc, /* special_function */ 241 "R_CRIS_RELATIVE", /* name */ 242 FALSE, /* partial_inplace */ 243 0, /* src_mask */ 244 0xffffffff, /* dst_mask */ 245 FALSE), /* pcrel_offset */ 246 247 /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */ 248 HOWTO (R_CRIS_16_GOT, /* type */ 249 0, /* rightshift */ 250 1, /* size (0 = byte, 1 = short, 2 = long) */ 251 16, /* bitsize */ 252 FALSE, /* pc_relative */ 253 0, /* bitpos */ 254 complain_overflow_bitfield, /* complain_on_overflow */ 255 bfd_elf_generic_reloc, /* special_function */ 256 "R_CRIS_16_GOT", /* name */ 257 FALSE, /* partial_inplace */ 258 0, /* src_mask */ 259 0xffff, /* dst_mask */ 260 FALSE), /* pcrel_offset */ 261 262 HOWTO (R_CRIS_32_GOT, /* type */ 263 0, /* rightshift */ 264 2, /* size (0 = byte, 1 = short, 2 = long) */ 265 32, /* bitsize */ 266 FALSE, /* pc_relative */ 267 0, /* bitpos */ 268 complain_overflow_bitfield, /* complain_on_overflow */ 269 bfd_elf_generic_reloc, /* special_function */ 270 "R_CRIS_32_GOT", /* name */ 271 FALSE, /* partial_inplace */ 272 0, /* src_mask */ 273 0xffffffff, /* dst_mask */ 274 FALSE), /* pcrel_offset */ 275 276 /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of 277 the GOT table for the symbol. */ 278 HOWTO (R_CRIS_16_GOTPLT, /* type */ 279 0, /* rightshift */ 280 1, /* size (0 = byte, 1 = short, 2 = long) */ 281 16, /* bitsize */ 282 FALSE, /* pc_relative */ 283 0, /* bitpos */ 284 complain_overflow_bitfield, /* complain_on_overflow */ 285 bfd_elf_generic_reloc, /* special_function */ 286 "R_CRIS_16_GOTPLT", /* name */ 287 FALSE, /* partial_inplace */ 288 0, /* src_mask */ 289 0xffff, /* dst_mask */ 290 FALSE), /* pcrel_offset */ 291 292 HOWTO (R_CRIS_32_GOTPLT, /* type */ 293 0, /* rightshift */ 294 2, /* size (0 = byte, 1 = short, 2 = long) */ 295 32, /* bitsize */ 296 FALSE, /* pc_relative */ 297 0, /* bitpos */ 298 complain_overflow_bitfield, /* complain_on_overflow */ 299 bfd_elf_generic_reloc, /* special_function */ 300 "R_CRIS_32_GOTPLT", /* name */ 301 FALSE, /* partial_inplace */ 302 0, /* src_mask */ 303 0xffffffff, /* dst_mask */ 304 FALSE), /* pcrel_offset */ 305 306 /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should 307 be necessary. */ 308 HOWTO (R_CRIS_32_GOTREL, /* type */ 309 0, /* rightshift */ 310 2, /* size (0 = byte, 1 = short, 2 = long) */ 311 32, /* bitsize */ 312 FALSE, /* pc_relative */ 313 0, /* bitpos */ 314 complain_overflow_bitfield, /* complain_on_overflow */ 315 bfd_elf_generic_reloc, /* special_function */ 316 "R_CRIS_32_GOTREL", /* name */ 317 FALSE, /* partial_inplace */ 318 0, /* src_mask */ 319 0xffffffff, /* dst_mask */ 320 FALSE), /* pcrel_offset */ 321 322 /* A 32-bit offset from GOT to entry for this symbol in PLT and request 323 to create PLT entry for symbol. */ 324 HOWTO (R_CRIS_32_PLT_GOTREL, /* type */ 325 0, /* rightshift */ 326 2, /* size (0 = byte, 1 = short, 2 = long) */ 327 32, /* bitsize */ 328 FALSE, /* pc_relative */ 329 0, /* bitpos */ 330 complain_overflow_bitfield, /* complain_on_overflow */ 331 bfd_elf_generic_reloc, /* special_function */ 332 "R_CRIS_32_PLT_GOTREL", /* name */ 333 FALSE, /* partial_inplace */ 334 0, /* src_mask */ 335 0xffffffff, /* dst_mask */ 336 FALSE), /* pcrel_offset */ 337 338 /* A 32-bit offset from PC (location after the relocation) + addend to 339 entry for this symbol in PLT and request to create PLT entry for 340 symbol. */ 341 HOWTO (R_CRIS_32_PLT_PCREL, /* type */ 342 0, /* rightshift */ 343 2, /* size (0 = byte, 1 = short, 2 = long) */ 344 32, /* bitsize */ 345 TRUE, /* pc_relative */ 346 0, /* bitpos */ 347 complain_overflow_bitfield, /* complain_on_overflow */ 348 cris_elf_pcrel_reloc, /* special_function */ 349 "R_CRIS_32_PLT_PCREL", /* name */ 350 FALSE, /* partial_inplace */ 351 0, /* src_mask */ 352 0xffffffff, /* dst_mask */ 353 TRUE), /* pcrel_offset */ 354 355 /* We don't handle these in any special manner and cross-format 356 linking is not supported; just recognize them enough to pass them 357 around. FIXME: do the same for most PIC relocs and add sanity 358 tests to actually refuse gracefully to handle these and PIC 359 relocs for cross-format linking. */ 360 #define TLSHOWTO32(name) \ 361 HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \ 362 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE) 363 #define TLSHOWTO16X(name, X) \ 364 HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \ 365 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE) 366 #define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned) 367 #define TLSHOWTO16S(name) TLSHOWTO16X(name, signed) 368 369 TLSHOWTO32 (R_CRIS_32_GOT_GD), 370 TLSHOWTO16 (R_CRIS_16_GOT_GD), 371 TLSHOWTO32 (R_CRIS_32_GD), 372 TLSHOWTO32 (R_CRIS_DTP), 373 TLSHOWTO32 (R_CRIS_32_DTPREL), 374 TLSHOWTO16S (R_CRIS_16_DTPREL), 375 TLSHOWTO32 (R_CRIS_32_GOT_TPREL), 376 TLSHOWTO16S (R_CRIS_16_GOT_TPREL), 377 TLSHOWTO32 (R_CRIS_32_TPREL), 378 TLSHOWTO16S (R_CRIS_16_TPREL), 379 TLSHOWTO32 (R_CRIS_DTPMOD), 380 TLSHOWTO32 (R_CRIS_32_IE) 381 }; 382 383 /* 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. 496 The slightly unintuitive code layout is an attempt to keep at least 497 some similarities with other ports, hoping to simplify general 498 changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */ 499 500 static bfd_boolean 501 cris_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 502 { 503 int offset; 504 size_t size; 505 506 if (bfd_get_mach (abfd) == bfd_mach_cris_v32) 507 switch (note->descsz) 508 { 509 default: 510 return FALSE; 511 512 case 202: /* Linux/CRISv32 */ 513 /* pr_cursig */ 514 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); 515 516 /* pr_pid */ 517 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 22); 518 519 /* pr_reg */ 520 offset = 70; 521 size = 128; 522 523 break; 524 } 525 else 526 switch (note->descsz) 527 { 528 default: 529 return FALSE; 530 531 case 214: /* Linux/CRIS */ 532 /* pr_cursig */ 533 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); 534 535 /* pr_pid */ 536 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 22); 537 538 /* pr_reg */ 539 offset = 70; 540 size = 140; 541 542 break; 543 } 544 545 /* Make a ".reg/999" section. */ 546 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 547 size, note->descpos + offset); 548 } 549 550 static bfd_boolean 551 cris_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 552 { 553 if (bfd_get_mach (abfd) == bfd_mach_cris_v32) 554 switch (note->descsz) 555 { 556 default: 557 return FALSE; 558 559 case 124: /* Linux/CRISv32 elf_prpsinfo */ 560 elf_tdata (abfd)->core_program 561 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); 562 elf_tdata (abfd)->core_command 563 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); 564 } 565 else 566 switch (note->descsz) 567 { 568 default: 569 return FALSE; 570 571 case 124: /* Linux/CRIS elf_prpsinfo */ 572 elf_tdata (abfd)->core_program 573 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); 574 elf_tdata (abfd)->core_command 575 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); 576 } 577 578 /* Note that for some reason, a spurious space is tacked 579 onto the end of the args in some (at least one anyway) 580 implementations, so strip it off if it exists. */ 581 582 { 583 char *command = elf_tdata (abfd)->core_command; 584 int n = strlen (command); 585 586 if (0 < n && command[n - 1] == ' ') 587 command[n - 1] = '\0'; 588 } 589 590 return TRUE; 591 } 592 593 /* The name of the dynamic interpreter. This is put in the .interp 594 section. */ 595 596 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" 597 598 /* The size in bytes of an entry in the procedure linkage table. */ 599 600 #define PLT_ENTRY_SIZE 20 601 #define PLT_ENTRY_SIZE_V32 26 602 603 /* The first entry in an absolute procedure linkage table looks like this. */ 604 605 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] = 606 { 607 0xfc, 0xe1, 608 0x7e, 0x7e, /* push mof. */ 609 0x7f, 0x0d, /* (dip [pc+]) */ 610 0, 0, 0, 0, /* Replaced with address of .got + 4. */ 611 0x30, 0x7a, /* move [...],mof */ 612 0x7f, 0x0d, /* (dip [pc+]) */ 613 0, 0, 0, 0, /* Replaced with address of .got + 8. */ 614 0x30, 0x09 /* jump [...] */ 615 }; 616 617 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] = 618 { 619 0x84, 0xe2, /* subq 4,$sp */ 620 0x6f, 0xfe, /* move.d 0,$acr */ 621 0, 0, 0, 0, /* Replaced by address of .got + 4. */ 622 0x7e, 0x7a, /* move $mof,[$sp] */ 623 0x3f, 0x7a, /* move [$acr],$mof */ 624 0x04, 0xf2, /* addq 4,acr */ 625 0x6f, 0xfa, /* move.d [$acr],$acr */ 626 0xbf, 0x09, /* jump $acr */ 627 0xb0, 0x05, /* nop */ 628 0, 0 /* Pad out to 26 bytes. */ 629 }; 630 631 /* Subsequent entries in an absolute procedure linkage table look like 632 this. */ 633 634 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] = 635 { 636 0x7f, 0x0d, /* (dip [pc+]) */ 637 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */ 638 0x30, 0x09, /* jump [...] */ 639 0x3f, 0x7e, /* move [pc+],mof */ 640 0, 0, 0, 0, /* Replaced with offset into relocation table. */ 641 0x2f, 0xfe, /* add.d [pc+],pc */ 642 0xec, 0xff, 643 0xff, 0xff /* Replaced with offset to start of .plt. */ 644 }; 645 646 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] = 647 { 648 0x6f, 0xfe, /* move.d 0,$acr */ 649 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */ 650 0x6f, 0xfa, /* move.d [$acr],$acr */ 651 0xbf, 0x09, /* jump $acr */ 652 0xb0, 0x05, /* nop */ 653 0x3f, 0x7e, /* move 0,mof */ 654 0, 0, 0, 0, /* Replaced with offset into relocation table. */ 655 0xbf, 0x0e, /* ba start_of_plt0_entry */ 656 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */ 657 0xb0, 0x05 /* nop */ 658 }; 659 660 /* The first entry in a PIC procedure linkage table looks like this. */ 661 662 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] = 663 { 664 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */ 665 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */ 666 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */ 667 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */ 668 }; 669 670 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] = 671 { 672 0x84, 0xe2, /* subq 4,$sp */ 673 0x04, 0x01, /* addoq 4,$r0,$acr */ 674 0x7e, 0x7a, /* move $mof,[$sp] */ 675 0x3f, 0x7a, /* move [$acr],$mof */ 676 0x04, 0xf2, /* addq 4,$acr */ 677 0x6f, 0xfa, /* move.d [$acr],$acr */ 678 0xbf, 0x09, /* jump $acr */ 679 0xb0, 0x05, /* nop */ 680 0, 0, /* Pad out to 26 bytes. */ 681 0, 0, 0, 0, 682 0, 0, 0, 0 683 }; 684 685 /* Subsequent entries in a PIC procedure linkage table look like this. */ 686 687 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] = 688 { 689 0x6f, 0x0d, /* (bdap [pc+].d,r0) */ 690 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */ 691 0x30, 0x09, /* jump [...] */ 692 0x3f, 0x7e, /* move [pc+],mof */ 693 0, 0, 0, 0, /* Replaced with offset into relocation table. */ 694 0x2f, 0xfe, /* add.d [pc+],pc */ 695 0xec, 0xff, /* Replaced with offset to start of .plt. */ 696 0xff, 0xff 697 }; 698 699 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] = 700 { 701 0x6f, 0x0d, /* addo.d 0,$r0,$acr */ 702 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */ 703 0x6f, 0xfa, /* move.d [$acr],$acr */ 704 0xbf, 0x09, /* jump $acr */ 705 0xb0, 0x05, /* nop */ 706 0x3f, 0x7e, /* move relocoffs,$mof */ 707 0, 0, 0, 0, /* Replaced with offset into relocation table. */ 708 0xbf, 0x0e, /* ba start_of_plt */ 709 0, 0, 0, 0, /* Replaced with offset to start of .plt. */ 710 0xb0, 0x05 /* nop */ 711 }; 712 713 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits 714 (and most other PIC/shlib stuff). Check that we don't drift away 715 without reason. 716 717 The CRIS linker, like the m68k and i386 linkers (and probably the rest 718 too) needs to keep track of the number of relocs that it decides to 719 copy in check_relocs for each symbol. This is so that it can discard 720 PC relative relocs if it doesn't need them when linking with 721 -Bsymbolic. We store the information in a field extending the regular 722 ELF linker hash table. */ 723 724 /* This structure keeps track of the number of PC relative relocs we have 725 copied for a given symbol. */ 726 727 struct elf_cris_pcrel_relocs_copied 728 { 729 /* Next section. */ 730 struct elf_cris_pcrel_relocs_copied *next; 731 732 /* A section in dynobj. */ 733 asection *section; 734 735 /* Number of relocs copied in this section. */ 736 bfd_size_type count; 737 738 /* Example of reloc being copied, for message. */ 739 enum elf_cris_reloc_type r_type; 740 }; 741 742 /* CRIS ELF linker hash entry. */ 743 744 struct elf_cris_link_hash_entry 745 { 746 struct elf_link_hash_entry root; 747 748 /* Number of PC relative relocs copied for this symbol. */ 749 struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied; 750 751 /* The GOTPLT references are CRIS-specific; the goal is to avoid having 752 both a general GOT and a PLT-specific GOT entry for the same symbol, 753 when it is referenced both as a function and as a function pointer. 754 755 Number of GOTPLT references for a function. */ 756 bfd_signed_vma gotplt_refcount; 757 758 /* Actual GOTPLT index for this symbol, if applicable, or zero if not 759 (zero is never used as an index). FIXME: We should be able to fold 760 this with gotplt_refcount in a union, like the got and plt unions in 761 elf_link_hash_entry. */ 762 bfd_size_type gotplt_offset; 763 764 /* The root.got.refcount is the sum of the regular reference counts 765 (this) and those members below. We have to keep a separate count 766 to track when we've found the first (or last) reference to a 767 regular got entry. The offset is in root.got.offset. */ 768 bfd_signed_vma reg_got_refcount; 769 770 /* Similar to the above, the number of reloc references to this 771 symbols that need a R_CRIS_32_TPREL slot. The offset is in 772 root.got.offset, because this and .dtp_refcount can't validly 773 happen when there's also a regular GOT entry; that's invalid 774 input for which an error is emitted. */ 775 bfd_signed_vma tprel_refcount; 776 777 /* Similar to the above, the number of reloc references to this 778 symbols that need a R_CRIS_DTP slot. The offset is in 779 root.got.offset; plus 4 if .tprel_refcount > 0. */ 780 bfd_signed_vma dtp_refcount; 781 }; 782 783 static bfd_boolean 784 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *, 785 void * ); 786 static bfd_boolean 787 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *, 788 void *); 789 790 /* The local_got_refcounts and local_got_offsets are a multiple of 791 LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the 792 refcount for GOT itself, see code), with the summary / group offset 793 for local symbols located at offset N, reference counts for 794 ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP 795 relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N + 796 3*LSNUM. */ 797 798 #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info) 799 #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info) 800 #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info) 801 #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4) 802 803 /* CRIS ELF linker hash table. */ 804 805 struct elf_cris_link_hash_table 806 { 807 struct elf_link_hash_table root; 808 809 /* We can't use the PLT offset and calculate to get the GOTPLT offset, 810 since we try and avoid creating GOTPLT:s when there's already a GOT. 811 Instead, we keep and update the next available index here. */ 812 bfd_size_type next_gotplt_entry; 813 814 /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have 815 been seen for any input; if != 0, then the constant-offset 816 R_CRIS_DTPMOD is needed for this DSO/executable. This turns 817 negative at relocation, so that we don't need an extra flag for 818 when the reloc is output. */ 819 bfd_signed_vma dtpmod_refcount; 820 }; 821 822 /* Traverse a CRIS ELF linker hash table. */ 823 824 #define elf_cris_link_hash_traverse(table, func, info) \ 825 (elf_link_hash_traverse \ 826 (&(table)->root, \ 827 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ 828 (info))) 829 830 /* Get the CRIS ELF linker hash table from a link_info structure. */ 831 832 #define elf_cris_hash_table(p) \ 833 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 834 == CRIS_ELF_DATA ? ((struct elf_cris_link_hash_table *) ((p)->hash)) : NULL) 835 836 /* Get the CRIS ELF linker hash entry from a regular hash entry (the 837 "parent class"). The .root reference is just a simple type 838 check on the argument. */ 839 840 #define elf_cris_hash_entry(p) \ 841 ((struct elf_cris_link_hash_entry *) (&(p)->root)) 842 843 /* Create an entry in a CRIS ELF linker hash table. */ 844 845 static struct bfd_hash_entry * 846 elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry, 847 struct bfd_hash_table *table, 848 const char *string) 849 { 850 struct elf_cris_link_hash_entry *ret = 851 (struct elf_cris_link_hash_entry *) entry; 852 853 /* Allocate the structure if it has not already been allocated by a 854 subclass. */ 855 if (ret == (struct elf_cris_link_hash_entry *) NULL) 856 ret = ((struct elf_cris_link_hash_entry *) 857 bfd_hash_allocate (table, 858 sizeof (struct elf_cris_link_hash_entry))); 859 if (ret == (struct elf_cris_link_hash_entry *) NULL) 860 return (struct bfd_hash_entry *) ret; 861 862 /* Call the allocation method of the superclass. */ 863 ret = ((struct elf_cris_link_hash_entry *) 864 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 865 table, string)); 866 if (ret != (struct elf_cris_link_hash_entry *) NULL) 867 { 868 ret->pcrel_relocs_copied = NULL; 869 ret->gotplt_refcount = 0; 870 ret->gotplt_offset = 0; 871 ret->dtp_refcount = 0; 872 ret->tprel_refcount = 0; 873 ret->reg_got_refcount = 0; 874 } 875 876 return (struct bfd_hash_entry *) ret; 877 } 878 879 /* Create a CRIS ELF linker hash table. */ 880 881 static struct bfd_link_hash_table * 882 elf_cris_link_hash_table_create (bfd *abfd) 883 { 884 struct elf_cris_link_hash_table *ret; 885 bfd_size_type amt = sizeof (struct elf_cris_link_hash_table); 886 887 ret = ((struct elf_cris_link_hash_table *) bfd_malloc (amt)); 888 if (ret == (struct elf_cris_link_hash_table *) NULL) 889 return NULL; 890 891 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, 892 elf_cris_link_hash_newfunc, 893 sizeof (struct elf_cris_link_hash_entry), 894 CRIS_ELF_DATA)) 895 { 896 free (ret); 897 return NULL; 898 } 899 900 /* Initialize to skip over the first three entries in the gotplt; they 901 are used for run-time symbol evaluation. */ 902 ret->next_gotplt_entry = 12; 903 904 /* We haven't seen any R_CRIS_nn_GOT_TPREL initially. */ 905 ret->dtpmod_refcount = 0; 906 907 return &ret->root.root; 908 } 909 910 /* Perform a single relocation. By default we use the standard BFD 911 routines, with a few tweaks. */ 912 913 static bfd_reloc_status_type 914 cris_final_link_relocate (reloc_howto_type * howto, 915 bfd * input_bfd, 916 asection * input_section, 917 bfd_byte * contents, 918 Elf_Internal_Rela * rel, 919 bfd_vma relocation) 920 { 921 bfd_reloc_status_type r; 922 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info); 923 924 /* PC-relative relocations are relative to the position *after* 925 the reloc. Note that for R_CRIS_8_PCREL the adjustment is 926 not a single byte, since PC must be 16-bit-aligned. */ 927 switch (r_type) 928 { 929 /* Check that the 16-bit GOT relocs are positive. */ 930 case R_CRIS_16_GOTPLT: 931 case R_CRIS_16_GOT: 932 if ((bfd_signed_vma) relocation < 0) 933 return bfd_reloc_overflow; 934 break; 935 936 case R_CRIS_32_PLT_PCREL: 937 case R_CRIS_32_PCREL: 938 relocation -= 2; 939 /* Fall through. */ 940 case R_CRIS_8_PCREL: 941 case R_CRIS_16_PCREL: 942 relocation -= 2; 943 break; 944 945 default: 946 break; 947 } 948 949 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 950 contents, rel->r_offset, 951 relocation, rel->r_addend); 952 return r; 953 } 954 955 956 /* The number of errors left before we stop outputting reloc-specific 957 explanatory messages. By coincidence, this works nicely together 958 with the default number of messages you'll get from LD about 959 "relocation truncated to fit" messages before you get an 960 "additional relocation overflows omitted from the output". */ 961 static int additional_relocation_error_msg_count = 10; 962 963 /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was 964 copied, for further comments. */ 965 966 static bfd_boolean 967 cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, 968 struct bfd_link_info *info, 969 bfd *input_bfd, 970 asection *input_section, 971 bfd_byte *contents, 972 Elf_Internal_Rela *relocs, 973 Elf_Internal_Sym *local_syms, 974 asection **local_sections) 975 { 976 struct elf_cris_link_hash_table * htab; 977 bfd *dynobj; 978 Elf_Internal_Shdr *symtab_hdr; 979 struct elf_link_hash_entry **sym_hashes; 980 bfd_vma *local_got_offsets; 981 asection *sgot; 982 asection *splt; 983 asection *sreloc; 984 Elf_Internal_Rela *rel; 985 Elf_Internal_Rela *relend; 986 asection *srelgot; 987 988 htab = elf_cris_hash_table (info); 989 if (htab == NULL) 990 return FALSE; 991 992 dynobj = elf_hash_table (info)->dynobj; 993 local_got_offsets = elf_local_got_offsets (input_bfd); 994 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; 995 sym_hashes = elf_sym_hashes (input_bfd); 996 relend = relocs + input_section->reloc_count; 997 998 sgot = NULL; 999 splt = NULL; 1000 sreloc = NULL; 1001 srelgot = NULL; 1002 1003 if (dynobj != NULL) 1004 { 1005 splt = bfd_get_linker_section (dynobj, ".plt"); 1006 sgot = bfd_get_linker_section (dynobj, ".got"); 1007 } 1008 1009 for (rel = relocs; rel < relend; rel ++) 1010 { 1011 reloc_howto_type *howto; 1012 unsigned long r_symndx; 1013 Elf_Internal_Sym *sym; 1014 asection *sec; 1015 struct elf_link_hash_entry *h; 1016 bfd_vma relocation; 1017 bfd_reloc_status_type r; 1018 const char *symname = NULL; 1019 enum elf_cris_reloc_type r_type; 1020 1021 r_type = ELF32_R_TYPE (rel->r_info); 1022 1023 if ( r_type == R_CRIS_GNU_VTINHERIT 1024 || r_type == R_CRIS_GNU_VTENTRY) 1025 continue; 1026 1027 r_symndx = ELF32_R_SYM (rel->r_info); 1028 howto = cris_elf_howto_table + r_type; 1029 h = NULL; 1030 sym = NULL; 1031 sec = NULL; 1032 1033 if (r_symndx < symtab_hdr->sh_info) 1034 { 1035 sym = local_syms + r_symndx; 1036 sec = local_sections [r_symndx]; 1037 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 1038 1039 symname = (bfd_elf_string_from_elf_section 1040 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 1041 if (symname == NULL) 1042 symname = bfd_section_name (input_bfd, sec); 1043 } 1044 else 1045 { 1046 bfd_boolean warned; 1047 bfd_boolean unresolved_reloc; 1048 1049 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 1050 r_symndx, symtab_hdr, sym_hashes, 1051 h, sec, relocation, 1052 unresolved_reloc, warned); 1053 1054 symname = h->root.root.string; 1055 1056 if (unresolved_reloc 1057 /* Perhaps we should detect the cases that 1058 sec->output_section is expected to be NULL like i386 and 1059 m68k, but apparently (and according to elfxx-ia64.c) all 1060 valid cases are where the symbol is defined in a shared 1061 object which we link dynamically against. This includes 1062 PLT relocs for which we've created a PLT entry and other 1063 relocs for which we're prepared to create dynamic 1064 relocations. 1065 1066 For now, new situations cause us to just err when 1067 sec->output_offset is NULL but the object with the symbol 1068 is *not* dynamically linked against. Thus this will 1069 automatically remind us so we can see if there are other 1070 valid cases we need to revisit. */ 1071 && (sec->owner->flags & DYNAMIC) != 0) 1072 relocation = 0; 1073 1074 else if (h->root.type == bfd_link_hash_defined 1075 || h->root.type == bfd_link_hash_defweak) 1076 { 1077 /* Here follow the cases where the relocation value must 1078 be zero (or when further handling is simplified when 1079 zero). I can't claim to understand the various 1080 conditions and they weren't described in the files 1081 where I copied them from (elf32-m68k.c and 1082 elf32-i386.c), but let's mention examples of where 1083 they happen. FIXME: Perhaps define and use a 1084 dynamic_symbol_p function like ia64. 1085 1086 - When creating a shared library, we can have an 1087 ordinary relocation for a symbol defined in a shared 1088 library (perhaps the one we create). We then make 1089 the relocation value zero, as the value seen now will 1090 be added into the relocation addend in this shared 1091 library, but must be handled only at dynamic-link 1092 time. FIXME: Not sure this example covers the 1093 h->elf_link_hash_flags test, though it's there in 1094 other targets. */ 1095 if (info->shared 1096 && ((! info->symbolic && h->dynindx != -1) 1097 || !h->def_regular) 1098 && (input_section->flags & SEC_ALLOC) != 0 1099 && (r_type == R_CRIS_8 1100 || r_type == R_CRIS_16 1101 || r_type == R_CRIS_32 1102 || r_type == R_CRIS_8_PCREL 1103 || r_type == R_CRIS_16_PCREL 1104 || r_type == R_CRIS_32_PCREL)) 1105 relocation = 0; 1106 else if (!info->relocatable && unresolved_reloc 1107 && (_bfd_elf_section_offset (output_bfd, info, 1108 input_section, 1109 rel->r_offset) 1110 != (bfd_vma) -1)) 1111 { 1112 _bfd_error_handler 1113 (_("%B, section %A: unresolvable relocation %s against symbol `%s'"), 1114 input_bfd, 1115 input_section, 1116 cris_elf_howto_table[r_type].name, 1117 symname); 1118 bfd_set_error (bfd_error_bad_value); 1119 return FALSE; 1120 } 1121 } 1122 } 1123 1124 if (sec != NULL && discarded_section (sec)) 1125 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 1126 rel, 1, relend, howto, 0, contents); 1127 1128 if (info->relocatable) 1129 continue; 1130 1131 switch (r_type) 1132 { 1133 case R_CRIS_16_GOTPLT: 1134 case R_CRIS_32_GOTPLT: 1135 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT, 1136 but we require a PLT, and the PLT handling will take care of 1137 filling in the PLT-specific GOT entry. For the GOT offset, 1138 calculate it as we do when filling it in for the .got.plt 1139 section. If we don't have a PLT, punt to GOT handling. */ 1140 if (h != NULL 1141 && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0) 1142 { 1143 asection *sgotplt 1144 = bfd_get_linker_section (dynobj, ".got.plt"); 1145 bfd_vma got_offset; 1146 1147 BFD_ASSERT (h->dynindx != -1); 1148 BFD_ASSERT (sgotplt != NULL); 1149 1150 got_offset 1151 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset; 1152 1153 relocation = got_offset; 1154 break; 1155 } 1156 1157 /* We didn't make a PLT entry for this symbol. Maybe everything is 1158 folded into the GOT. Other than folding, this happens when 1159 statically linking PIC code, or when using -Bsymbolic. Check 1160 that we instead have a GOT entry as done for us by 1161 elf_cris_adjust_dynamic_symbol, and drop through into the 1162 ordinary GOT cases. This must not happen for the 1163 executable, because any reference it does to a function 1164 that is satisfied by a DSO must generate a PLT. We assume 1165 these call-specific relocs don't address non-functions. */ 1166 if (h != NULL 1167 && (h->got.offset == (bfd_vma) -1 1168 || (!info->shared 1169 && !(h->def_regular 1170 || (!h->def_dynamic 1171 && h->root.type == bfd_link_hash_undefweak))))) 1172 { 1173 (*_bfd_error_handler) 1174 ((h->got.offset == (bfd_vma) -1) 1175 ? _("%B, section %A: No PLT nor GOT for relocation %s" 1176 " against symbol `%s'") 1177 : _("%B, section %A: No PLT for relocation %s" 1178 " against symbol `%s'"), 1179 input_bfd, 1180 input_section, 1181 cris_elf_howto_table[r_type].name, 1182 (symname != NULL && symname[0] != '\0' 1183 ? symname : _("[whose name is lost]"))); 1184 1185 /* FIXME: Perhaps blaming input is not the right thing to 1186 do; this is probably an internal error. But it is true 1187 that we didn't like that particular input. */ 1188 bfd_set_error (bfd_error_bad_value); 1189 return FALSE; 1190 } 1191 /* Fall through. */ 1192 1193 /* The size of the actual relocation is not used here; we only 1194 fill in the GOT table here. */ 1195 case R_CRIS_16_GOT: 1196 case R_CRIS_32_GOT: 1197 { 1198 bfd_vma off; 1199 1200 /* Note that despite using RELA relocations, the .got contents 1201 is always filled in with the link-relative relocation 1202 value; the addend. */ 1203 1204 if (h != NULL) 1205 { 1206 off = h->got.offset; 1207 BFD_ASSERT (off != (bfd_vma) -1); 1208 1209 if (!elf_hash_table (info)->dynamic_sections_created 1210 || (! info->shared 1211 && (h->def_regular 1212 || h->type == STT_FUNC 1213 || h->needs_plt)) 1214 || (info->shared 1215 && (info->symbolic || h->dynindx == -1) 1216 && h->def_regular)) 1217 { 1218 /* This wasn't checked above for ! info->shared, but 1219 must hold there if we get here; the symbol must 1220 be defined in the regular program or be undefweak 1221 or be a function or otherwise need a PLT. */ 1222 BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created 1223 || info->shared 1224 || h->def_regular 1225 || h->type == STT_FUNC 1226 || h->needs_plt 1227 || h->root.type == bfd_link_hash_undefweak); 1228 1229 /* This is actually a static link, or it is a 1230 -Bsymbolic link and the symbol is defined locally, 1231 or is undefweak, or the symbol was forced to be 1232 local because of a version file, or we're not 1233 creating a dynamic object. We must initialize this 1234 entry in the global offset table. Since the offset 1235 must always be a multiple of 4, we use the least 1236 significant bit to record whether we have 1237 initialized it already. 1238 1239 If this GOT entry should be runtime-initialized, we 1240 will create a .rela.got relocation entry to 1241 initialize the value. This is done in the 1242 finish_dynamic_symbol routine. */ 1243 if ((off & 1) != 0) 1244 off &= ~1; 1245 else 1246 { 1247 bfd_put_32 (output_bfd, relocation, 1248 sgot->contents + off); 1249 h->got.offset |= 1; 1250 } 1251 } 1252 } 1253 else 1254 { 1255 BFD_ASSERT (local_got_offsets != NULL 1256 && local_got_offsets[r_symndx] != (bfd_vma) -1); 1257 1258 off = local_got_offsets[r_symndx]; 1259 1260 /* The offset must always be a multiple of 4. We use 1261 the least significant bit to record whether we have 1262 already generated the necessary reloc. */ 1263 if ((off & 1) != 0) 1264 off &= ~1; 1265 else 1266 { 1267 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 1268 1269 if (info->shared) 1270 { 1271 Elf_Internal_Rela outrel; 1272 bfd_byte *loc; 1273 1274 if (srelgot == NULL) 1275 srelgot 1276 = bfd_get_linker_section (dynobj, ".rela.got"); 1277 BFD_ASSERT (srelgot != NULL); 1278 1279 outrel.r_offset = (sgot->output_section->vma 1280 + sgot->output_offset 1281 + off); 1282 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE); 1283 outrel.r_addend = relocation; 1284 loc = srelgot->contents; 1285 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 1286 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1287 } 1288 1289 local_got_offsets[r_symndx] |= 1; 1290 } 1291 } 1292 1293 relocation = sgot->output_offset + off; 1294 if (rel->r_addend != 0) 1295 { 1296 /* We can't do anything for a relocation which is against 1297 a symbol *plus offset*. GOT holds relocations for 1298 symbols. Make this an error; the compiler isn't 1299 allowed to pass us these kinds of things. */ 1300 if (h == NULL) 1301 (*_bfd_error_handler) 1302 (_("%B, section %A: relocation %s with non-zero addend %d" 1303 " against local symbol"), 1304 input_bfd, 1305 input_section, 1306 cris_elf_howto_table[r_type].name, 1307 rel->r_addend); 1308 else 1309 (*_bfd_error_handler) 1310 (_("%B, section %A: relocation %s with non-zero addend %d" 1311 " against symbol `%s'"), 1312 input_bfd, 1313 input_section, 1314 cris_elf_howto_table[r_type].name, 1315 rel->r_addend, 1316 symname[0] != '\0' ? symname : _("[whose name is lost]")); 1317 1318 bfd_set_error (bfd_error_bad_value); 1319 return FALSE; 1320 } 1321 } 1322 break; 1323 1324 case R_CRIS_32_GOTREL: 1325 /* This relocation must only be performed against local symbols. 1326 It's also ok when we link a program and the symbol is either 1327 defined in an ordinary (non-DSO) object or is undefined weak. */ 1328 if (h != NULL 1329 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1330 && !(!info->shared 1331 && (h->def_regular 1332 || (!h->def_dynamic 1333 && h->root.type == bfd_link_hash_undefweak)))) 1334 { 1335 (*_bfd_error_handler) 1336 (_("%B, section %A: relocation %s is" 1337 " not allowed for global symbol: `%s'"), 1338 input_bfd, 1339 input_section, 1340 cris_elf_howto_table[r_type].name, 1341 symname); 1342 bfd_set_error (bfd_error_bad_value); 1343 return FALSE; 1344 } 1345 1346 /* This can happen if we get a link error with the input ELF 1347 variant mismatching the output variant. Emit an error so 1348 it's noticed if it happens elsewhere. */ 1349 if (sgot == NULL) 1350 { 1351 (*_bfd_error_handler) 1352 (_("%B, section %A: relocation %s with no GOT created"), 1353 input_bfd, 1354 input_section, 1355 cris_elf_howto_table[r_type].name); 1356 bfd_set_error (bfd_error_bad_value); 1357 return FALSE; 1358 } 1359 1360 /* This relocation is like a PC-relative one, except the 1361 reference point is the location of GOT. Note that 1362 sgot->output_offset is not involved in this calculation. We 1363 always want the start of entire .got section, not the 1364 position after the reserved header. */ 1365 relocation -= sgot->output_section->vma; 1366 break; 1367 1368 case R_CRIS_32_PLT_PCREL: 1369 /* Relocation is to the entry for this symbol in the 1370 procedure linkage table. */ 1371 1372 /* Resolve a PLT_PCREL reloc against a local symbol directly, 1373 without using the procedure linkage table. */ 1374 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 1375 break; 1376 1377 if (h->plt.offset == (bfd_vma) -1 1378 || splt == NULL) 1379 { 1380 /* We didn't make a PLT entry for this symbol. This 1381 happens when statically linking PIC code, or when 1382 using -Bsymbolic. */ 1383 break; 1384 } 1385 1386 relocation = (splt->output_section->vma 1387 + splt->output_offset 1388 + h->plt.offset); 1389 break; 1390 1391 case R_CRIS_32_PLT_GOTREL: 1392 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the 1393 start of the .got section. See also comment at 1394 R_CRIS_32_GOT. */ 1395 relocation -= sgot->output_section->vma; 1396 1397 /* Resolve a PLT_GOTREL reloc against a local symbol directly, 1398 without using the procedure linkage table. */ 1399 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 1400 break; 1401 1402 if (h->plt.offset == (bfd_vma) -1 1403 || splt == NULL) 1404 { 1405 /* We didn't make a PLT entry for this symbol. This 1406 happens when statically linking PIC code, or when 1407 using -Bsymbolic. */ 1408 break; 1409 } 1410 1411 relocation = (splt->output_section->vma 1412 + splt->output_offset 1413 + h->plt.offset 1414 - sgot->output_section->vma); 1415 break; 1416 1417 case R_CRIS_8_PCREL: 1418 case R_CRIS_16_PCREL: 1419 case R_CRIS_32_PCREL: 1420 /* If the symbol was local, we need no shlib-specific handling. */ 1421 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 1422 || h->dynindx == -1) 1423 break; 1424 1425 /* Fall through. */ 1426 case R_CRIS_8: 1427 case R_CRIS_16: 1428 case R_CRIS_32: 1429 if (info->shared 1430 && r_symndx != STN_UNDEF 1431 && (input_section->flags & SEC_ALLOC) != 0 1432 && ((r_type != R_CRIS_8_PCREL 1433 && r_type != R_CRIS_16_PCREL 1434 && r_type != R_CRIS_32_PCREL) 1435 || (!info->symbolic 1436 || (h != NULL && !h->def_regular)))) 1437 { 1438 Elf_Internal_Rela outrel; 1439 bfd_byte *loc; 1440 bfd_boolean skip, relocate; 1441 1442 /* When generating a shared object, these relocations 1443 are copied into the output file to be resolved at run 1444 time. */ 1445 1446 if (sreloc == NULL) 1447 { 1448 sreloc = _bfd_elf_get_dynamic_reloc_section 1449 (dynobj, input_section, /*rela?*/ TRUE); 1450 /* The section should have been created in cris_elf_check_relocs, 1451 but that function will not be called for objects which fail in 1452 cris_elf_merge_private_bfd_data. */ 1453 if (sreloc == NULL) 1454 { 1455 bfd_set_error (bfd_error_bad_value); 1456 return FALSE; 1457 } 1458 } 1459 1460 skip = FALSE; 1461 relocate = FALSE; 1462 1463 outrel.r_offset = 1464 _bfd_elf_section_offset (output_bfd, info, input_section, 1465 rel->r_offset); 1466 if (outrel.r_offset == (bfd_vma) -1) 1467 skip = TRUE; 1468 else if (outrel.r_offset == (bfd_vma) -2 1469 /* For now, undefined weak symbols with non-default 1470 visibility (yielding 0), like exception info for 1471 discarded sections, will get a R_CRIS_NONE 1472 relocation rather than no relocation, because we 1473 notice too late that the symbol doesn't need a 1474 relocation. */ 1475 || (h != NULL 1476 && h->root.type == bfd_link_hash_undefweak 1477 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)) 1478 skip = TRUE, relocate = TRUE; 1479 outrel.r_offset += (input_section->output_section->vma 1480 + input_section->output_offset); 1481 1482 if (skip) 1483 memset (&outrel, 0, sizeof outrel); 1484 /* h->dynindx may be -1 if the symbol was marked to 1485 become local. */ 1486 else if (h != NULL 1487 && ((! info->symbolic && h->dynindx != -1) 1488 || !h->def_regular)) 1489 { 1490 BFD_ASSERT (h->dynindx != -1); 1491 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 1492 outrel.r_addend = relocation + rel->r_addend; 1493 } 1494 else 1495 { 1496 outrel.r_addend = relocation + rel->r_addend; 1497 1498 if (r_type == R_CRIS_32) 1499 { 1500 relocate = TRUE; 1501 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE); 1502 } 1503 else 1504 { 1505 long indx; 1506 1507 if (bfd_is_abs_section (sec)) 1508 indx = 0; 1509 else if (sec == NULL || sec->owner == NULL) 1510 { 1511 bfd_set_error (bfd_error_bad_value); 1512 return FALSE; 1513 } 1514 else 1515 { 1516 asection *osec; 1517 1518 /* We are turning this relocation into one 1519 against a section symbol. It would be 1520 proper to subtract the symbol's value, 1521 osec->vma, from the emitted reloc addend, 1522 but ld.so expects buggy relocs. */ 1523 osec = sec->output_section; 1524 indx = elf_section_data (osec)->dynindx; 1525 if (indx == 0) 1526 { 1527 osec = htab->root.text_index_section; 1528 indx = elf_section_data (osec)->dynindx; 1529 } 1530 BFD_ASSERT (indx != 0); 1531 } 1532 1533 outrel.r_info = ELF32_R_INFO (indx, r_type); 1534 } 1535 } 1536 1537 loc = sreloc->contents; 1538 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 1539 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1540 1541 /* This reloc will be computed at runtime, so there's no 1542 need to do anything now, except for R_CRIS_32 relocations 1543 that have been turned into R_CRIS_RELATIVE. */ 1544 if (!relocate) 1545 continue; 1546 } 1547 1548 break; 1549 1550 case R_CRIS_16_DTPREL: 1551 case R_CRIS_32_DTPREL: 1552 /* This relocation must only be performed against local 1553 symbols, or to sections that are not loadable. It's also 1554 ok when we link a program and the symbol is defined in an 1555 ordinary (non-DSO) object (if it's undefined there, we've 1556 already seen an error). */ 1557 if (h != NULL 1558 && (input_section->flags & SEC_ALLOC) != 0 1559 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1560 && (info->shared 1561 || (!h->def_regular 1562 && h->root.type != bfd_link_hash_undefined))) 1563 { 1564 (*_bfd_error_handler) 1565 ((h->root.type == bfd_link_hash_undefined) 1566 /* We shouldn't get here for GCC-emitted code. */ 1567 ? _("%B, section %A: relocation %s has an undefined" 1568 " reference to `%s', perhaps a declaration mixup?") 1569 : ("%B, section %A: relocation %s is" 1570 " not allowed for `%s', a global symbol with default" 1571 " visibility, perhaps a declaration mixup?"), 1572 input_bfd, 1573 input_section, 1574 cris_elf_howto_table[r_type].name, 1575 symname != NULL && symname[0] != '\0' 1576 ? symname : _("[whose name is lost]")); 1577 bfd_set_error (bfd_error_bad_value); 1578 return FALSE; 1579 } 1580 1581 BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0 1582 || htab->dtpmod_refcount != 0); 1583 1584 /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't 1585 already done so. Note that we do this in .got.plt, not 1586 in .got, as .got.plt contains the first part, still the 1587 reloc is against .got, because the linker script directs 1588 (is required to direct) them both into .got. */ 1589 if (htab->dtpmod_refcount > 0 1590 && (input_section->flags & SEC_ALLOC) != 0) 1591 { 1592 asection *sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); 1593 BFD_ASSERT (sgotplt != NULL); 1594 1595 if (info->shared) 1596 { 1597 Elf_Internal_Rela outrel; 1598 bfd_byte *loc; 1599 1600 if (srelgot == NULL) 1601 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 1602 BFD_ASSERT (srelgot != NULL); 1603 loc = srelgot->contents; 1604 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 1605 1606 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12); 1607 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16); 1608 outrel.r_offset = (sgotplt->output_section->vma 1609 + sgotplt->output_offset 1610 + 12); 1611 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD); 1612 outrel.r_addend = 0; 1613 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1614 } 1615 else 1616 { 1617 /* For an executable, the GOT entry contents is known. */ 1618 bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12); 1619 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16); 1620 } 1621 1622 /* Reverse the sign to mark that we've emitted the 1623 required GOT entry. */ 1624 htab->dtpmod_refcount = - htab->dtpmod_refcount; 1625 } 1626 1627 /* The relocation is the offset from the start of the module 1628 TLS block to the (local) symbol. */ 1629 relocation -= elf_hash_table (info)->tls_sec == NULL 1630 ? 0 : elf_hash_table (info)->tls_sec->vma; 1631 break; 1632 1633 case R_CRIS_32_GD: 1634 if (info->shared) 1635 { 1636 bfd_set_error (bfd_error_invalid_operation); 1637 1638 /* We've already informed in cris_elf_check_relocs that 1639 this is an error. */ 1640 return FALSE; 1641 } 1642 /* Fall through. */ 1643 1644 case R_CRIS_16_GOT_GD: 1645 case R_CRIS_32_GOT_GD: 1646 if (rel->r_addend != 0) 1647 { 1648 /* We can't do anything for a relocation which is against a 1649 symbol *plus offset*. The GOT holds relocations for 1650 symbols. Make this an error; the compiler isn't allowed 1651 to pass us these kinds of things. */ 1652 (*_bfd_error_handler) 1653 (_("%B, section %A: relocation %s with non-zero addend %d" 1654 " against symbol `%s'"), 1655 input_bfd, 1656 input_section, 1657 cris_elf_howto_table[r_type].name, 1658 rel->r_addend, 1659 symname[0] != '\0' ? symname : _("[whose name is lost]")); 1660 1661 bfd_set_error (bfd_error_bad_value); 1662 return FALSE; 1663 } 1664 1665 if (!info->shared 1666 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h))) 1667 { 1668 /* Known contents of the GOT. */ 1669 bfd_vma off; 1670 1671 /* The symbol is defined in the program, so just write 1672 (1, known_tpoffset) into the GOT. */ 1673 relocation -= elf_hash_table (info)->tls_sec->vma; 1674 1675 if (h != NULL) 1676 { 1677 off = elf_cris_hash_entry (h)->tprel_refcount > 0 1678 ? h->got.offset + 4 : h->got.offset; 1679 } 1680 else 1681 { 1682 off = local_got_offsets[r_symndx]; 1683 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)]) 1684 off += 4; 1685 } 1686 1687 /* We use bit 1 of the offset as a flag for GOT entry with 1688 the R_CRIS_DTP reloc, setting it when we've emitted the 1689 GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL 1690 relocs. */ 1691 if ((off & 2) == 0) 1692 { 1693 off &= ~3; 1694 1695 if (h != NULL) 1696 h->got.offset |= 2; 1697 else 1698 local_got_offsets[r_symndx] |= 2; 1699 1700 bfd_put_32 (output_bfd, 1, sgot->contents + off); 1701 bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4); 1702 } 1703 else 1704 off &= ~3; 1705 1706 relocation = sgot->output_offset + off 1707 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0); 1708 } 1709 else 1710 { 1711 /* Not all parts of the GOT entry are known; emit a real 1712 relocation. */ 1713 bfd_vma off; 1714 1715 if (h != NULL) 1716 off = elf_cris_hash_entry (h)->tprel_refcount > 0 1717 ? h->got.offset + 4 : h->got.offset; 1718 else 1719 { 1720 off = local_got_offsets[r_symndx]; 1721 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)]) 1722 off += 4; 1723 } 1724 1725 /* See above re bit 1 and bit 0 usage. */ 1726 if ((off & 2) == 0) 1727 { 1728 Elf_Internal_Rela outrel; 1729 bfd_byte *loc; 1730 1731 off &= ~3; 1732 1733 if (h != NULL) 1734 h->got.offset |= 2; 1735 else 1736 local_got_offsets[r_symndx] |= 2; 1737 1738 /* Clear the target contents of the GOT (just as a 1739 gesture; it's already cleared on allocation): this 1740 relocation is not like the other dynrelocs. */ 1741 bfd_put_32 (output_bfd, 0, sgot->contents + off); 1742 bfd_put_32 (output_bfd, 0, sgot->contents + off + 4); 1743 1744 if (srelgot == NULL) 1745 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 1746 BFD_ASSERT (srelgot != NULL); 1747 1748 if (h != NULL && h->dynindx != -1) 1749 { 1750 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP); 1751 relocation = 0; 1752 } 1753 else 1754 { 1755 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP); 1756 1757 /* NULL if we had an error. */ 1758 relocation -= elf_hash_table (info)->tls_sec == NULL 1759 ? 0 : elf_hash_table (info)->tls_sec->vma; 1760 } 1761 1762 outrel.r_offset = (sgot->output_section->vma 1763 + sgot->output_offset 1764 + off); 1765 outrel.r_addend = relocation; 1766 loc = srelgot->contents; 1767 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 1768 1769 /* NULL if we had an error. */ 1770 if (srelgot->contents != NULL) 1771 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1772 } 1773 else 1774 off &= ~3; 1775 1776 relocation = sgot->output_offset + off 1777 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0); 1778 } 1779 1780 /* The GOT-relative offset to the GOT entry is the 1781 relocation, or for R_CRIS_32_GD, the actual address of 1782 the GOT entry. */ 1783 break; 1784 1785 case R_CRIS_32_IE: 1786 if (info->shared) 1787 { 1788 bfd_set_error (bfd_error_invalid_operation); 1789 1790 /* We've already informed in cris_elf_check_relocs that 1791 this is an error. */ 1792 return FALSE; 1793 } 1794 /* Fall through. */ 1795 1796 case R_CRIS_32_GOT_TPREL: 1797 case R_CRIS_16_GOT_TPREL: 1798 if (rel->r_addend != 0) 1799 { 1800 /* We can't do anything for a relocation which is 1801 against a symbol *plus offset*. GOT holds 1802 relocations for symbols. Make this an error; the 1803 compiler isn't allowed to pass us these kinds of 1804 things. */ 1805 (*_bfd_error_handler) 1806 (_("%B, section %A: relocation %s with non-zero addend %d" 1807 " against symbol `%s'"), 1808 input_bfd, 1809 input_section, 1810 cris_elf_howto_table[r_type].name, 1811 rel->r_addend, 1812 symname[0] != '\0' ? symname : _("[whose name is lost]")); 1813 bfd_set_error (bfd_error_bad_value); 1814 return FALSE; 1815 } 1816 1817 if (!info->shared 1818 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h))) 1819 { 1820 /* Known contents of the GOT. */ 1821 bfd_vma off; 1822 1823 /* The symbol is defined in the program, so just write 1824 the -prog_tls_size+known_tpoffset into the GOT. */ 1825 relocation -= elf_hash_table (info)->tls_sec->vma; 1826 relocation -= elf_hash_table (info)->tls_size; 1827 1828 if (h != NULL) 1829 off = h->got.offset; 1830 else 1831 off = local_got_offsets[r_symndx]; 1832 1833 /* Bit 0 is used to mark whether we've emitted the required 1834 entry (and if needed R_CRIS_32_TPREL reloc). Bit 1 1835 is used similarly for R_CRIS_DTP, see above. */ 1836 if ((off & 1) == 0) 1837 { 1838 off &= ~3; 1839 1840 if (h != NULL) 1841 h->got.offset |= 1; 1842 else 1843 local_got_offsets[r_symndx] |= 1; 1844 1845 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 1846 } 1847 else 1848 off &= ~3; 1849 1850 relocation = sgot->output_offset + off 1851 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0); 1852 } 1853 else 1854 { 1855 /* Emit a real relocation. */ 1856 bfd_vma off; 1857 1858 if (h != NULL) 1859 off = h->got.offset; 1860 else 1861 off = local_got_offsets[r_symndx]; 1862 1863 /* See above re usage of bit 0 and 1. */ 1864 if ((off & 1) == 0) 1865 { 1866 Elf_Internal_Rela outrel; 1867 bfd_byte *loc; 1868 1869 off &= ~3; 1870 1871 if (h != NULL) 1872 h->got.offset |= 1; 1873 else 1874 local_got_offsets[r_symndx] |= 1; 1875 1876 if (srelgot == NULL) 1877 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 1878 BFD_ASSERT (srelgot != NULL); 1879 1880 if (h != NULL && h->dynindx != -1) 1881 { 1882 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL); 1883 relocation = 0; 1884 } 1885 else 1886 { 1887 outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL); 1888 1889 /* NULL if we had an error. */ 1890 relocation -= elf_hash_table (info)->tls_sec == NULL 1891 ? 0 : elf_hash_table (info)->tls_sec->vma; 1892 } 1893 1894 /* Just "define" the initial contents in some 1895 semi-logical way. */ 1896 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 1897 1898 outrel.r_offset = (sgot->output_section->vma 1899 + sgot->output_offset 1900 + off); 1901 outrel.r_addend = relocation; 1902 loc = srelgot->contents; 1903 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 1904 /* NULL if we had an error. */ 1905 if (srelgot->contents != NULL) 1906 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1907 } 1908 else 1909 off &= ~3; 1910 1911 relocation = sgot->output_offset + off 1912 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0); 1913 } 1914 1915 /* The GOT-relative offset to the GOT entry is the relocation, 1916 or for R_CRIS_32_GD, the actual address of the GOT entry. */ 1917 break; 1918 1919 case R_CRIS_16_TPREL: 1920 case R_CRIS_32_TPREL: 1921 /* This relocation must only be performed against symbols 1922 defined in an ordinary (non-DSO) object. */ 1923 if (info->shared) 1924 { 1925 bfd_set_error (bfd_error_invalid_operation); 1926 1927 /* We've already informed in cris_elf_check_relocs that 1928 this is an error. */ 1929 return FALSE; 1930 } 1931 1932 if (h != NULL 1933 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1934 && !(h->def_regular || ELF_COMMON_DEF_P (h)) 1935 /* If it's undefined, then an error message has already 1936 been emitted. */ 1937 && h->root.type != bfd_link_hash_undefined) 1938 { 1939 (*_bfd_error_handler) 1940 (_("%B, section %A: relocation %s is" 1941 " not allowed for symbol: `%s'" 1942 " which is defined outside the program," 1943 " perhaps a declaration mixup?"), 1944 input_bfd, 1945 input_section, 1946 cris_elf_howto_table[r_type].name, 1947 symname); 1948 bfd_set_error (bfd_error_bad_value); 1949 return FALSE; 1950 } 1951 1952 /* NULL if we had an error. */ 1953 relocation -= elf_hash_table (info)->tls_sec == NULL 1954 ? 0 1955 : (elf_hash_table (info)->tls_sec->vma 1956 + elf_hash_table (info)->tls_size); 1957 1958 /* The TLS-relative offset is the relocation. */ 1959 break; 1960 1961 default: 1962 BFD_FAIL (); 1963 return FALSE; 1964 } 1965 1966 r = cris_final_link_relocate (howto, input_bfd, input_section, 1967 contents, rel, relocation); 1968 1969 if (r != bfd_reloc_ok) 1970 { 1971 const char * msg = (const char *) NULL; 1972 1973 switch (r) 1974 { 1975 case bfd_reloc_overflow: 1976 r = info->callbacks->reloc_overflow 1977 (info, (h ? &h->root : NULL), symname, howto->name, 1978 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 1979 if (additional_relocation_error_msg_count > 0) 1980 { 1981 additional_relocation_error_msg_count--; 1982 switch (r_type) 1983 { 1984 case R_CRIS_16_GOTPLT: 1985 case R_CRIS_16_GOT: 1986 1987 /* Not just TLS is involved here, so we make 1988 generation and message depend on -fPIC/-fpic 1989 only. */ 1990 case R_CRIS_16_GOT_TPREL: 1991 case R_CRIS_16_GOT_GD: 1992 (*_bfd_error_handler) 1993 (_("(too many global variables for -fpic:" 1994 " recompile with -fPIC)")); 1995 break; 1996 1997 case R_CRIS_16_TPREL: 1998 case R_CRIS_16_DTPREL: 1999 (*_bfd_error_handler) 2000 (_("(thread-local data too big for -fpic or" 2001 " -msmall-tls: recompile with -fPIC or" 2002 " -mno-small-tls)")); 2003 break; 2004 2005 /* No known cause for overflow for other relocs. */ 2006 default: 2007 break; 2008 } 2009 } 2010 break; 2011 2012 case bfd_reloc_undefined: 2013 r = info->callbacks->undefined_symbol 2014 (info, symname, input_bfd, input_section, rel->r_offset, 2015 TRUE); 2016 break; 2017 2018 case bfd_reloc_outofrange: 2019 msg = _("internal error: out of range error"); 2020 break; 2021 2022 case bfd_reloc_notsupported: 2023 msg = _("internal error: unsupported relocation error"); 2024 break; 2025 2026 case bfd_reloc_dangerous: 2027 msg = _("internal error: dangerous relocation"); 2028 break; 2029 2030 default: 2031 msg = _("internal error: unknown error"); 2032 break; 2033 } 2034 2035 if (msg) 2036 r = info->callbacks->warning 2037 (info, msg, symname, input_bfd, input_section, rel->r_offset); 2038 2039 if (! r) 2040 return FALSE; 2041 } 2042 } 2043 2044 return TRUE; 2045 } 2046 2047 /* Finish up dynamic symbol handling. We set the contents of various 2048 dynamic sections here. */ 2049 2050 static bfd_boolean 2051 elf_cris_finish_dynamic_symbol (bfd *output_bfd, 2052 struct bfd_link_info *info, 2053 struct elf_link_hash_entry *h, 2054 Elf_Internal_Sym *sym) 2055 { 2056 struct elf_cris_link_hash_table * htab; 2057 bfd *dynobj; 2058 2059 /* Where in the plt entry to put values. */ 2060 int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16; 2061 2062 /* What offset to add to the distance to the first PLT entry for the 2063 value at plt_off3. */ 2064 int plt_off3_value_bias = 4; 2065 2066 /* Where in the PLT entry the call-dynlink-stub is (happens to be same 2067 for PIC and non-PIC for v32 and pre-v32). */ 2068 int plt_stub_offset = 8; 2069 int plt_entry_size = PLT_ENTRY_SIZE; 2070 const bfd_byte *plt_entry = elf_cris_plt_entry; 2071 const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry; 2072 2073 htab = elf_cris_hash_table (info); 2074 if (htab == NULL) 2075 return FALSE; 2076 2077 /* Adjust the various PLT entry offsets. */ 2078 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32) 2079 { 2080 plt_off2 = 14; 2081 plt_off3 = 20; 2082 plt_off3_value_bias = -2; 2083 plt_stub_offset = 12; 2084 plt_entry_size = PLT_ENTRY_SIZE_V32; 2085 plt_entry = elf_cris_plt_entry_v32; 2086 plt_pic_entry = elf_cris_pic_plt_entry_v32; 2087 } 2088 2089 dynobj = elf_hash_table (info)->dynobj; 2090 2091 if (h->plt.offset != (bfd_vma) -1) 2092 { 2093 asection *splt; 2094 asection *sgotplt; 2095 asection *srela; 2096 bfd_vma got_base; 2097 2098 bfd_vma gotplt_offset 2099 = elf_cris_hash_entry (h)->gotplt_offset; 2100 Elf_Internal_Rela rela; 2101 bfd_byte *loc; 2102 bfd_boolean has_gotplt = gotplt_offset != 0; 2103 2104 /* Get the index in the .rela.plt relocations for the .got.plt 2105 entry that corresponds to this symbol. 2106 We have to count backwards here, and the result is only valid 2107 as an index into .rela.plt. We also have to undo the effect 2108 of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into 2109 .got.plt) for which gotplt_offset is adjusted, because while 2110 that entry goes into .got.plt, its relocation goes into 2111 .rela.got, not .rela.plt. (It's not PLT-specific; not to be 2112 processed as part of the runtime lazy .rela.plt relocation). 2113 FIXME: There be literal constants here... */ 2114 bfd_vma rela_plt_index 2115 = (htab->dtpmod_refcount != 0 2116 ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3); 2117 2118 /* Get the offset into the .got table of the entry that corresponds 2119 to this function. Note that we embed knowledge that "incoming" 2120 .got goes after .got.plt in the output without padding (pointer 2121 aligned). However, that knowledge is present in several other 2122 places too. */ 2123 bfd_vma got_offset 2124 = (has_gotplt 2125 ? gotplt_offset 2126 : h->got.offset + htab->next_gotplt_entry); 2127 2128 /* This symbol has an entry in the procedure linkage table. Set it 2129 up. */ 2130 2131 BFD_ASSERT (h->dynindx != -1); 2132 2133 splt = bfd_get_linker_section (dynobj, ".plt"); 2134 sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); 2135 srela = bfd_get_linker_section (dynobj, ".rela.plt"); 2136 BFD_ASSERT (splt != NULL && sgotplt != NULL 2137 && (! has_gotplt || srela != NULL)); 2138 2139 got_base = sgotplt->output_section->vma + sgotplt->output_offset; 2140 2141 /* Fill in the entry in the procedure linkage table. */ 2142 if (! info->shared) 2143 { 2144 memcpy (splt->contents + h->plt.offset, plt_entry, 2145 plt_entry_size); 2146 2147 /* We need to enter the absolute address of the GOT entry here. */ 2148 bfd_put_32 (output_bfd, got_base + got_offset, 2149 splt->contents + h->plt.offset + plt_off1); 2150 } 2151 else 2152 { 2153 memcpy (splt->contents + h->plt.offset, plt_pic_entry, 2154 plt_entry_size); 2155 bfd_put_32 (output_bfd, got_offset, 2156 splt->contents + h->plt.offset + plt_off1); 2157 } 2158 2159 /* Fill in the plt entry and make a relocation, if this is a "real" 2160 PLT entry. */ 2161 if (has_gotplt) 2162 { 2163 /* Fill in the offset to the reloc table. */ 2164 bfd_put_32 (output_bfd, 2165 rela_plt_index * sizeof (Elf32_External_Rela), 2166 splt->contents + h->plt.offset + plt_off2); 2167 2168 /* Fill in the offset to the first PLT entry, where to "jump". */ 2169 bfd_put_32 (output_bfd, 2170 - (h->plt.offset + plt_off3 + plt_off3_value_bias), 2171 splt->contents + h->plt.offset + plt_off3); 2172 2173 /* Fill in the entry in the global offset table with the address of 2174 the relocating stub. */ 2175 bfd_put_32 (output_bfd, 2176 (splt->output_section->vma 2177 + splt->output_offset 2178 + h->plt.offset 2179 + plt_stub_offset), 2180 sgotplt->contents + got_offset); 2181 2182 /* Fill in the entry in the .rela.plt section. */ 2183 rela.r_offset = (sgotplt->output_section->vma 2184 + sgotplt->output_offset 2185 + got_offset); 2186 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT); 2187 rela.r_addend = 0; 2188 loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela); 2189 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 2190 } 2191 2192 if (!h->def_regular) 2193 { 2194 /* Mark the symbol as undefined, rather than as defined in 2195 the .plt section. Leave the value alone. */ 2196 sym->st_shndx = SHN_UNDEF; 2197 2198 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't 2199 know whether resetting the value is significant; if it really 2200 is, rather than a quirk or bug in the sparc port, then I 2201 believe we'd see this elsewhere. */ 2202 /* If the symbol is weak, we do need to clear the value. 2203 Otherwise, the PLT entry would provide a definition for 2204 the symbol even if the symbol wasn't defined anywhere, 2205 and so the symbol would never be NULL. */ 2206 if (!h->ref_regular_nonweak) 2207 sym->st_value = 0; 2208 } 2209 } 2210 2211 /* For an ordinary program, we emit .got relocs only for symbols that 2212 are in the dynamic-symbols table and are either defined by the 2213 program or are undefined weak symbols, or are function symbols 2214 where we do not output a PLT: the PLT reloc was output above and all 2215 references to the function symbol are redirected to the PLT. */ 2216 if (h->got.offset != (bfd_vma) -1 2217 && (elf_cris_hash_entry (h)->reg_got_refcount > 0) 2218 && (info->shared 2219 || (h->dynindx != -1 2220 && h->plt.offset == (bfd_vma) -1 2221 && !h->def_regular 2222 && h->root.type != bfd_link_hash_undefweak))) 2223 { 2224 asection *sgot; 2225 asection *srela; 2226 Elf_Internal_Rela rela; 2227 bfd_byte *loc; 2228 bfd_byte *where; 2229 2230 /* This symbol has an entry in the global offset table. Set it up. */ 2231 2232 sgot = bfd_get_linker_section (dynobj, ".got"); 2233 srela = bfd_get_linker_section (dynobj, ".rela.got"); 2234 BFD_ASSERT (sgot != NULL && srela != NULL); 2235 2236 rela.r_offset = (sgot->output_section->vma 2237 + sgot->output_offset 2238 + (h->got.offset &~ (bfd_vma) 1)); 2239 2240 /* If this is a static link, or it is a -Bsymbolic link and the 2241 symbol is defined locally or was forced to be local because 2242 of a version file, we just want to emit a RELATIVE reloc. 2243 The entry in the global offset table will already have been 2244 initialized in the relocate_section function. */ 2245 where = sgot->contents + (h->got.offset &~ (bfd_vma) 1); 2246 if (! elf_hash_table (info)->dynamic_sections_created 2247 || (info->shared 2248 && (info->symbolic || h->dynindx == -1) 2249 && h->def_regular)) 2250 { 2251 rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE); 2252 rela.r_addend = bfd_get_signed_32 (output_bfd, where); 2253 } 2254 else 2255 { 2256 bfd_put_32 (output_bfd, (bfd_vma) 0, where); 2257 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT); 2258 rela.r_addend = 0; 2259 } 2260 2261 loc = srela->contents; 2262 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); 2263 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 2264 } 2265 2266 if (h->needs_copy) 2267 { 2268 asection *s; 2269 Elf_Internal_Rela rela; 2270 bfd_byte *loc; 2271 2272 /* This symbol needs a copy reloc. Set it up. */ 2273 2274 BFD_ASSERT (h->dynindx != -1 2275 && (h->root.type == bfd_link_hash_defined 2276 || h->root.type == bfd_link_hash_defweak)); 2277 2278 s = bfd_get_linker_section (dynobj, ".rela.bss"); 2279 BFD_ASSERT (s != NULL); 2280 2281 rela.r_offset = (h->root.u.def.value 2282 + h->root.u.def.section->output_section->vma 2283 + h->root.u.def.section->output_offset); 2284 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY); 2285 rela.r_addend = 0; 2286 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 2287 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 2288 } 2289 2290 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ 2291 if (strcmp (h->root.root.string, "_DYNAMIC") == 0 2292 || h == elf_hash_table (info)->hgot) 2293 sym->st_shndx = SHN_ABS; 2294 2295 return TRUE; 2296 } 2297 2298 /* Finish up the dynamic sections. Do *not* emit relocs here, as their 2299 offsets were changed, as part of -z combreloc handling, from those we 2300 computed. */ 2301 2302 static bfd_boolean 2303 elf_cris_finish_dynamic_sections (bfd *output_bfd, 2304 struct bfd_link_info *info) 2305 { 2306 bfd *dynobj; 2307 asection *sgot; 2308 asection *sdyn; 2309 2310 dynobj = elf_hash_table (info)->dynobj; 2311 2312 sgot = bfd_get_linker_section (dynobj, ".got.plt"); 2313 BFD_ASSERT (sgot != NULL); 2314 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 2315 2316 if (elf_hash_table (info)->dynamic_sections_created) 2317 { 2318 asection *splt; 2319 Elf32_External_Dyn *dyncon, *dynconend; 2320 2321 splt = bfd_get_linker_section (dynobj, ".plt"); 2322 BFD_ASSERT (splt != NULL && sdyn != NULL); 2323 2324 dyncon = (Elf32_External_Dyn *) sdyn->contents; 2325 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 2326 for (; dyncon < dynconend; dyncon++) 2327 { 2328 Elf_Internal_Dyn dyn; 2329 asection *s; 2330 2331 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 2332 2333 switch (dyn.d_tag) 2334 { 2335 default: 2336 break; 2337 2338 case DT_PLTGOT: 2339 s = bfd_get_section_by_name (output_bfd, ".got"); 2340 BFD_ASSERT (s != NULL); 2341 dyn.d_un.d_ptr = s->vma; 2342 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2343 break; 2344 2345 case DT_JMPREL: 2346 /* Yes, we *can* have a .plt and no .plt.rela, for instance 2347 if all symbols are found in the .got (not .got.plt). */ 2348 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 2349 dyn.d_un.d_ptr = s != NULL ? s->vma : 0; 2350 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2351 break; 2352 2353 case DT_PLTRELSZ: 2354 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 2355 if (s == NULL) 2356 dyn.d_un.d_val = 0; 2357 else 2358 dyn.d_un.d_val = s->size; 2359 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2360 break; 2361 2362 case DT_RELASZ: 2363 /* The procedure linkage table relocs (DT_JMPREL) should 2364 not be included in the overall relocs (DT_RELA). 2365 Therefore, we override the DT_RELASZ entry here to 2366 make it not include the JMPREL relocs. Since the 2367 linker script arranges for .rela.plt to follow all 2368 other relocation sections, we don't have to worry 2369 about changing the DT_RELA entry. */ 2370 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 2371 if (s != NULL) 2372 dyn.d_un.d_val -= s->size; 2373 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2374 break; 2375 } 2376 } 2377 2378 /* Fill in the first entry in the procedure linkage table. */ 2379 if (splt->size > 0) 2380 { 2381 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32) 2382 { 2383 if (info->shared) 2384 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32, 2385 PLT_ENTRY_SIZE_V32); 2386 else 2387 { 2388 memcpy (splt->contents, elf_cris_plt0_entry_v32, 2389 PLT_ENTRY_SIZE_V32); 2390 bfd_put_32 (output_bfd, 2391 sgot->output_section->vma 2392 + sgot->output_offset + 4, 2393 splt->contents + 4); 2394 2395 elf_section_data (splt->output_section)->this_hdr.sh_entsize 2396 = PLT_ENTRY_SIZE_V32; 2397 } 2398 } 2399 else 2400 { 2401 if (info->shared) 2402 memcpy (splt->contents, elf_cris_pic_plt0_entry, 2403 PLT_ENTRY_SIZE); 2404 else 2405 { 2406 memcpy (splt->contents, elf_cris_plt0_entry, 2407 PLT_ENTRY_SIZE); 2408 bfd_put_32 (output_bfd, 2409 sgot->output_section->vma 2410 + sgot->output_offset + 4, 2411 splt->contents + 6); 2412 bfd_put_32 (output_bfd, 2413 sgot->output_section->vma 2414 + sgot->output_offset + 8, 2415 splt->contents + 14); 2416 2417 elf_section_data (splt->output_section)->this_hdr.sh_entsize 2418 = PLT_ENTRY_SIZE; 2419 } 2420 } 2421 } 2422 } 2423 2424 /* Fill in the first three entries in the global offset table. */ 2425 if (sgot->size > 0) 2426 { 2427 if (sdyn == NULL) 2428 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 2429 else 2430 bfd_put_32 (output_bfd, 2431 sdyn->output_section->vma + sdyn->output_offset, 2432 sgot->contents); 2433 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); 2434 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); 2435 } 2436 2437 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 2438 2439 return TRUE; 2440 } 2441 2442 /* Return the section that should be marked against GC for a given 2443 relocation. */ 2444 2445 static asection * 2446 cris_elf_gc_mark_hook (asection *sec, 2447 struct bfd_link_info *info, 2448 Elf_Internal_Rela *rel, 2449 struct elf_link_hash_entry *h, 2450 Elf_Internal_Sym *sym) 2451 { 2452 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info); 2453 if (h != NULL) 2454 switch (r_type) 2455 { 2456 case R_CRIS_GNU_VTINHERIT: 2457 case R_CRIS_GNU_VTENTRY: 2458 return NULL; 2459 2460 default: 2461 break; 2462 } 2463 2464 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 2465 } 2466 2467 /* Update the got entry reference counts for the section being removed. */ 2468 2469 static bfd_boolean 2470 cris_elf_gc_sweep_hook (bfd *abfd, 2471 struct bfd_link_info *info, 2472 asection *sec, 2473 const Elf_Internal_Rela *relocs) 2474 { 2475 struct elf_cris_link_hash_table * htab; 2476 Elf_Internal_Shdr *symtab_hdr; 2477 struct elf_link_hash_entry **sym_hashes; 2478 bfd_signed_vma *local_got_refcounts; 2479 const Elf_Internal_Rela *rel, *relend; 2480 bfd *dynobj; 2481 asection *sgot; 2482 asection *srelgot; 2483 2484 if (info->relocatable) 2485 return TRUE; 2486 2487 dynobj = elf_hash_table (info)->dynobj; 2488 if (dynobj == NULL) 2489 return TRUE; 2490 2491 htab = elf_cris_hash_table (info); 2492 if (htab == NULL) 2493 return FALSE; 2494 2495 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 2496 sym_hashes = elf_sym_hashes (abfd); 2497 local_got_refcounts = elf_local_got_refcounts (abfd); 2498 2499 sgot = bfd_get_linker_section (dynobj, ".got"); 2500 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 2501 2502 relend = relocs + sec->reloc_count; 2503 for (rel = relocs; rel < relend; rel++) 2504 { 2505 unsigned long r_symndx; 2506 struct elf_link_hash_entry *h = NULL; 2507 bfd_signed_vma got_element_size = 4; 2508 bfd_signed_vma *specific_refcount = NULL; 2509 enum elf_cris_reloc_type r_type; 2510 2511 r_symndx = ELF32_R_SYM (rel->r_info); 2512 if (r_symndx >= symtab_hdr->sh_info) 2513 { 2514 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 2515 while (h->root.type == bfd_link_hash_indirect 2516 || h->root.type == bfd_link_hash_warning) 2517 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2518 } 2519 2520 r_type = ELF32_R_TYPE (rel->r_info); 2521 switch (r_type) 2522 { 2523 case R_CRIS_32_GOT: 2524 case R_CRIS_16_GOT: 2525 case R_CRIS_16_GOTPLT: 2526 case R_CRIS_32_GOTPLT: 2527 specific_refcount = h != NULL 2528 ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount 2529 : &local_got_refcounts[LGOT_REG_NDX (r_symndx)]; 2530 break; 2531 2532 case R_CRIS_32_GD: 2533 case R_CRIS_32_GOT_GD: 2534 case R_CRIS_16_GOT_GD: 2535 got_element_size = 8; 2536 specific_refcount = h != NULL 2537 ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount 2538 : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)]; 2539 break; 2540 2541 case R_CRIS_32_IE: 2542 case R_CRIS_16_GOT_TPREL: 2543 case R_CRIS_32_GOT_TPREL: 2544 specific_refcount = h != NULL 2545 ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount 2546 : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)]; 2547 break; 2548 2549 default: 2550 break; 2551 } 2552 2553 switch (r_type) 2554 { 2555 case R_CRIS_32_IE: 2556 case R_CRIS_32_GD: 2557 case R_CRIS_16_GOT_TPREL: 2558 case R_CRIS_32_GOT_TPREL: 2559 case R_CRIS_32_GOT_GD: 2560 case R_CRIS_16_GOT_GD: 2561 case R_CRIS_16_GOT: 2562 case R_CRIS_32_GOT: 2563 if (h != NULL) 2564 { 2565 /* If the counters are 0 when we got here, we've 2566 miscounted somehow somewhere, an internal error. */ 2567 BFD_ASSERT (h->got.refcount > 0); 2568 --h->got.refcount; 2569 2570 BFD_ASSERT (*specific_refcount > 0); 2571 --*specific_refcount; 2572 if (*specific_refcount == 0) 2573 { 2574 /* We don't need the .got entry any more. */ 2575 sgot->size -= got_element_size; 2576 srelgot->size -= sizeof (Elf32_External_Rela); 2577 } 2578 break; 2579 } 2580 2581 local_got_reloc: 2582 if (local_got_refcounts != NULL) 2583 { 2584 /* If the counters are 0 when we got here, we've 2585 miscounted somehow somewhere, an internal error. */ 2586 BFD_ASSERT (local_got_refcounts[r_symndx] > 0); 2587 --local_got_refcounts[r_symndx]; 2588 2589 BFD_ASSERT (*specific_refcount > 0); 2590 --*specific_refcount; 2591 if (*specific_refcount == 0) 2592 { 2593 /* We don't need the .got entry any more. */ 2594 sgot->size -= got_element_size; 2595 if (info->shared) 2596 srelgot->size -= sizeof (Elf32_External_Rela); 2597 } 2598 } 2599 break; 2600 2601 case R_CRIS_16_GOTPLT: 2602 case R_CRIS_32_GOTPLT: 2603 /* For local symbols, treat these like GOT relocs. */ 2604 if (h == NULL) 2605 goto local_got_reloc; 2606 else 2607 /* For global symbols, adjust the reloc-specific refcount. */ 2608 elf_cris_hash_entry (h)->gotplt_refcount--; 2609 /* Fall through. */ 2610 2611 case R_CRIS_32_PLT_GOTREL: 2612 /* FIXME: We don't garbage-collect away the .got section. */ 2613 if (local_got_refcounts != NULL) 2614 local_got_refcounts[-1]--; 2615 /* Fall through. */ 2616 2617 case R_CRIS_8: 2618 case R_CRIS_16: 2619 case R_CRIS_32: 2620 case R_CRIS_8_PCREL: 2621 case R_CRIS_16_PCREL: 2622 case R_CRIS_32_PCREL: 2623 case R_CRIS_32_PLT_PCREL: 2624 /* Negate the increment we did in cris_elf_check_relocs. */ 2625 if (h != NULL) 2626 { 2627 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 2628 && h->plt.refcount > 0) 2629 --h->plt.refcount; 2630 } 2631 break; 2632 2633 case R_CRIS_32_DTPREL: 2634 /* This'd be a .dtpreld entry in e.g. debug info. */ 2635 if ((sec->flags & SEC_ALLOC) == 0) 2636 break; 2637 /* Fall through. */ 2638 case R_CRIS_16_DTPREL: 2639 htab->dtpmod_refcount--; 2640 if (htab->dtpmod_refcount == 0) 2641 htab->next_gotplt_entry -= 8; 2642 BFD_ASSERT (local_got_refcounts != NULL); 2643 local_got_refcounts[-1]--; 2644 break; 2645 2646 default: 2647 break; 2648 } 2649 } 2650 2651 return TRUE; 2652 } 2653 2654 /* The elf_backend_plt_sym_val hook function. */ 2655 2656 static bfd_vma 2657 cris_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, const asection *plt, 2658 const arelent *rel) 2659 { 2660 bfd_size_type plt_entry_size; 2661 bfd_size_type pltoffs; 2662 bfd *abfd = plt->owner; 2663 2664 /* Same for CRIS and CRIS v32; see elf_cris_(|pic_)plt_entry(|_v32)[]. */ 2665 bfd_size_type plt_entry_got_offset = 2; 2666 bfd_size_type plt_sec_size; 2667 bfd_size_type got_vma_for_dyn; 2668 asection *got; 2669 2670 /* FIXME: the .got section should be readily available also when 2671 we're not linking. */ 2672 if ((got = bfd_get_section_by_name (abfd, ".got")) == NULL) 2673 return (bfd_vma) -1; 2674 2675 plt_sec_size = bfd_section_size (plt->owner, plt); 2676 plt_entry_size 2677 = (bfd_get_mach (abfd) == bfd_mach_cris_v32 2678 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE); 2679 2680 /* Data in PLT is GOT-relative for DYN, but absolute for EXE. */ 2681 got_vma_for_dyn = (abfd->flags & EXEC_P) ? 0 : got->vma; 2682 2683 /* Because we can have merged GOT entries; a single .got entry for 2684 both GOT and the PLT part of the GOT (.got.plt), the index of the 2685 reloc in .rela.plt is not the same as the index in the PLT. 2686 Instead, we have to hunt down the GOT offset in the PLT that 2687 corresponds to that of this reloc. Unfortunately, we will only 2688 be called for the .rela.plt relocs, so we'll miss synthetic 2689 symbols for .plt entries with merged GOT entries. (FIXME: 2690 fixable by providing our own bfd_elf32_get_synthetic_symtab. 2691 Doesn't seem worthwile at time of this writing.) FIXME: we've 2692 gone from O(1) to O(N) (N number of PLT entries) for finding each 2693 PLT address. Shouldn't matter in practice though. */ 2694 2695 for (pltoffs = plt_entry_size; 2696 pltoffs < plt_sec_size; 2697 pltoffs += plt_entry_size) 2698 { 2699 bfd_size_type got_offset; 2700 bfd_byte gotoffs_raw[4]; 2701 2702 if (!bfd_get_section_contents (abfd, (asection *) plt, gotoffs_raw, 2703 pltoffs + plt_entry_got_offset, 2704 sizeof (gotoffs_raw))) 2705 return (bfd_vma) -1; 2706 2707 got_offset = bfd_get_32 (abfd, gotoffs_raw); 2708 if (got_offset + got_vma_for_dyn == rel->address) 2709 return plt->vma + pltoffs; 2710 } 2711 2712 /* While it's tempting to BFD_ASSERT that we shouldn't get here, 2713 that'd not be graceful behavior for invalid input. */ 2714 return (bfd_vma) -1; 2715 } 2716 2717 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT 2718 entry but we found we will not create any. Called when we find we will 2719 not have any PLT for this symbol, by for example 2720 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link, 2721 or elf_cris_size_dynamic_sections if no dynamic sections will be 2722 created (we're only linking static objects). */ 2723 2724 static bfd_boolean 2725 elf_cris_adjust_gotplt_to_got (struct elf_cris_link_hash_entry *h, void * p) 2726 { 2727 struct bfd_link_info *info = (struct bfd_link_info *) p; 2728 2729 /* A GOTPLT reloc, when activated, is supposed to be included into 2730 the PLT refcount. */ 2731 BFD_ASSERT (h->gotplt_refcount == 0 2732 || h->gotplt_refcount <= h->root.plt.refcount); 2733 2734 /* If nobody wanted a GOTPLT with this symbol, we're done. */ 2735 if (h->gotplt_refcount <= 0) 2736 return TRUE; 2737 2738 if (h->reg_got_refcount > 0) 2739 { 2740 /* There's a GOT entry for this symbol. Just adjust the refcounts. 2741 Probably not necessary at this stage, but keeping them accurate 2742 helps avoiding surprises later. */ 2743 h->root.got.refcount += h->gotplt_refcount; 2744 h->reg_got_refcount += h->gotplt_refcount; 2745 h->gotplt_refcount = 0; 2746 } 2747 else 2748 { 2749 /* No GOT entry for this symbol. We need to create one. */ 2750 bfd *dynobj = elf_hash_table (info)->dynobj; 2751 asection *sgot; 2752 asection *srelgot; 2753 2754 BFD_ASSERT (dynobj != NULL); 2755 sgot = bfd_get_linker_section (dynobj, ".got"); 2756 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 2757 2758 /* Put accurate refcounts there. */ 2759 h->root.got.refcount += h->gotplt_refcount; 2760 h->reg_got_refcount = h->gotplt_refcount; 2761 2762 h->gotplt_refcount = 0; 2763 2764 /* We always have a .got and a .rela.got section if there were 2765 GOTPLT relocs in input. */ 2766 BFD_ASSERT (sgot != NULL && srelgot != NULL); 2767 2768 /* Allocate space in the .got section. */ 2769 sgot->size += 4; 2770 2771 /* Allocate relocation space. */ 2772 srelgot->size += sizeof (Elf32_External_Rela); 2773 } 2774 2775 return TRUE; 2776 } 2777 2778 /* Try to fold PLT entries with GOT entries. There are two cases when we 2779 want to do this: 2780 2781 - When all PLT references are GOTPLT references, and there are GOT 2782 references, and this is not the executable. We don't have to 2783 generate a PLT at all. 2784 2785 - When there are both (ordinary) PLT references and GOT references, 2786 and this isn't the executable. 2787 We want to make the PLT reference use the ordinary GOT entry rather 2788 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry, 2789 since the GOT entry will have to be resolved at startup anyway. 2790 2791 Though the latter case is handled when room for the PLT is allocated, 2792 not here. 2793 2794 By folding into the GOT, we may need a round-trip to a PLT in the 2795 executable for calls, a loss in performance. Still, losing a 2796 reloc is a win in size and at least in start-up time. 2797 2798 Note that this function is called before symbols are forced local by 2799 version scripts. The differing cases are handled by 2800 elf_cris_hide_symbol. */ 2801 2802 static bfd_boolean 2803 elf_cris_try_fold_plt_to_got (struct elf_cris_link_hash_entry *h, void * p) 2804 { 2805 struct bfd_link_info *info = (struct bfd_link_info *) p; 2806 2807 /* If there are no GOT references for this symbol, we can't fold any 2808 other reference so there's nothing to do. Likewise if there are no 2809 PLT references; GOTPLT references included. */ 2810 if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0) 2811 return TRUE; 2812 2813 /* GOTPLT relocs are supposed to be included into the PLT refcount. */ 2814 BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount); 2815 2816 if (h->gotplt_refcount == h->root.plt.refcount) 2817 { 2818 /* The only PLT references are GOTPLT references, and there are GOT 2819 references. Convert PLT to GOT references. */ 2820 if (! elf_cris_adjust_gotplt_to_got (h, info)) 2821 return FALSE; 2822 2823 /* Clear the PLT references, so no PLT will be created. */ 2824 h->root.plt.offset = (bfd_vma) -1; 2825 } 2826 2827 return TRUE; 2828 } 2829 2830 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc 2831 to use a GOT entry (and create one) rather than requiring a GOTPLT 2832 entry. */ 2833 2834 static void 2835 elf_cris_hide_symbol (struct bfd_link_info *info, 2836 struct elf_link_hash_entry *h, 2837 bfd_boolean force_local) 2838 { 2839 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info); 2840 2841 _bfd_elf_link_hash_hide_symbol (info, h, force_local); 2842 } 2843 2844 /* Adjust a symbol defined by a dynamic object and referenced by a 2845 regular object. The current definition is in some section of the 2846 dynamic object, but we're not including those sections. We have to 2847 change the definition to something the rest of the link can 2848 understand. */ 2849 2850 static bfd_boolean 2851 elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info, 2852 struct elf_link_hash_entry *h) 2853 { 2854 struct elf_cris_link_hash_table * htab; 2855 bfd *dynobj; 2856 asection *s; 2857 bfd_size_type plt_entry_size; 2858 2859 htab = elf_cris_hash_table (info); 2860 if (htab == NULL) 2861 return FALSE; 2862 2863 dynobj = elf_hash_table (info)->dynobj; 2864 2865 /* Make sure we know what is going on here. */ 2866 BFD_ASSERT (dynobj != NULL 2867 && (h->needs_plt 2868 || h->u.weakdef != NULL 2869 || (h->def_dynamic 2870 && h->ref_regular 2871 && !h->def_regular))); 2872 2873 plt_entry_size 2874 = (bfd_get_mach (dynobj) == bfd_mach_cris_v32 2875 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE); 2876 2877 /* If this is a function, put it in the procedure linkage table. We 2878 will fill in the contents of the procedure linkage table later, 2879 when we know the address of the .got section. */ 2880 if (h->type == STT_FUNC 2881 || h->needs_plt) 2882 { 2883 /* If we link a program (not a DSO), we'll get rid of unnecessary 2884 PLT entries; we point to the actual symbols -- even for pic 2885 relocs, because a program built with -fpic should have the same 2886 result as one built without -fpic, specifically considering weak 2887 symbols. 2888 FIXME: m68k and i386 differ here, for unclear reasons. */ 2889 if (! info->shared 2890 && !h->def_dynamic) 2891 { 2892 /* This case can occur if we saw a PLT reloc in an input file, 2893 but the symbol was not defined by a dynamic object. In such 2894 a case, we don't actually need to build a procedure linkage 2895 table, and we can just do an absolute or PC reloc instead, or 2896 change a .got.plt index to a .got index for GOTPLT relocs. */ 2897 BFD_ASSERT (h->needs_plt); 2898 h->needs_plt = 0; 2899 h->plt.offset = (bfd_vma) -1; 2900 return 2901 elf_cris_adjust_gotplt_to_got ((struct 2902 elf_cris_link_hash_entry *) h, 2903 info); 2904 } 2905 2906 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT; 2907 where a pointer-equivalent symbol was unimportant (i.e. more 2908 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid 2909 of the PLT. We can't for the executable, because the GOT 2910 entries will point to the PLT there (and be constant). */ 2911 if (info->shared 2912 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*) 2913 h, info)) 2914 return FALSE; 2915 2916 /* GC or folding may have rendered this entry unused. */ 2917 if (h->plt.refcount <= 0) 2918 { 2919 h->needs_plt = 0; 2920 h->plt.offset = (bfd_vma) -1; 2921 return TRUE; 2922 } 2923 2924 /* Make sure this symbol is output as a dynamic symbol. */ 2925 if (h->dynindx == -1) 2926 { 2927 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2928 return FALSE; 2929 } 2930 2931 s = bfd_get_linker_section (dynobj, ".plt"); 2932 BFD_ASSERT (s != NULL); 2933 2934 /* If this is the first .plt entry, make room for the special 2935 first entry. */ 2936 if (s->size == 0) 2937 s->size += plt_entry_size; 2938 2939 /* If this symbol is not defined in a regular file, and we are 2940 not generating a shared library, then set the symbol to this 2941 location in the .plt. */ 2942 if (!info->shared 2943 && !h->def_regular) 2944 { 2945 h->root.u.def.section = s; 2946 h->root.u.def.value = s->size; 2947 } 2948 2949 /* If there's already a GOT entry, use that, not a .got.plt. A 2950 GOT field still has a reference count when we get here; it's 2951 not yet changed to an offset. We can't do this for an 2952 executable, because then the reloc associated with the PLT 2953 would get a non-PLT reloc pointing to the PLT. FIXME: Move 2954 this to elf_cris_try_fold_plt_to_got. */ 2955 if (info->shared && h->got.refcount > 0) 2956 { 2957 h->got.refcount += h->plt.refcount; 2958 2959 /* Mark the PLT offset to use the GOT entry by setting the low 2960 bit in the plt offset; it is always a multiple of 2961 plt_entry_size (which is at least a multiple of 2). */ 2962 BFD_ASSERT ((s->size % plt_entry_size) == 0); 2963 2964 /* Change the PLT refcount to an offset. */ 2965 h->plt.offset = s->size; 2966 2967 /* By not setting gotplt_offset (i.e. it remains at 0), we signal 2968 that the got entry should be used instead. */ 2969 BFD_ASSERT (((struct elf_cris_link_hash_entry *) 2970 h)->gotplt_offset == 0); 2971 2972 /* Make room for this entry. */ 2973 s->size += plt_entry_size; 2974 2975 return TRUE; 2976 } 2977 2978 /* No GOT reference for this symbol; prepare for an ordinary PLT. */ 2979 h->plt.offset = s->size; 2980 2981 /* Make room for this entry. */ 2982 s->size += plt_entry_size; 2983 2984 /* We also need to make an entry in the .got.plt section, which 2985 will be placed in the .got section by the linker script. */ 2986 ((struct elf_cris_link_hash_entry *) h)->gotplt_offset 2987 = htab->next_gotplt_entry; 2988 htab->next_gotplt_entry += 4; 2989 2990 s = bfd_get_linker_section (dynobj, ".got.plt"); 2991 BFD_ASSERT (s != NULL); 2992 s->size += 4; 2993 2994 /* We also need to make an entry in the .rela.plt section. */ 2995 2996 s = bfd_get_linker_section (dynobj, ".rela.plt"); 2997 BFD_ASSERT (s != NULL); 2998 s->size += sizeof (Elf32_External_Rela); 2999 3000 return TRUE; 3001 } 3002 3003 /* Reinitialize the plt offset now that it is not used as a reference 3004 count any more. */ 3005 h->plt.offset = (bfd_vma) -1; 3006 3007 /* If this is a weak symbol, and there is a real definition, the 3008 processor independent code will have arranged for us to see the 3009 real definition first, and we can just use the same value. */ 3010 if (h->u.weakdef != NULL) 3011 { 3012 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 3013 || h->u.weakdef->root.type == bfd_link_hash_defweak); 3014 h->root.u.def.section = h->u.weakdef->root.u.def.section; 3015 h->root.u.def.value = h->u.weakdef->root.u.def.value; 3016 return TRUE; 3017 } 3018 3019 /* This is a reference to a symbol defined by a dynamic object which 3020 is not a function. */ 3021 3022 /* If we are creating a shared library, we must presume that the 3023 only references to the symbol are via the global offset table. 3024 For such cases we need not do anything here; the relocations will 3025 be handled correctly by relocate_section. */ 3026 if (info->shared) 3027 return TRUE; 3028 3029 /* If there are no references to this symbol that do not use the 3030 GOT, we don't need to generate a copy reloc. */ 3031 if (!h->non_got_ref) 3032 return TRUE; 3033 3034 /* We must allocate the symbol in our .dynbss section, which will 3035 become part of the .bss section of the executable. There will be 3036 an entry for this symbol in the .dynsym section. The dynamic 3037 object will contain position independent code, so all references 3038 from the dynamic object to this symbol will go through the global 3039 offset table. The dynamic linker will use the .dynsym entry to 3040 determine the address it must put in the global offset table, so 3041 both the dynamic object and the regular object will refer to the 3042 same memory location for the variable. */ 3043 3044 s = bfd_get_linker_section (dynobj, ".dynbss"); 3045 BFD_ASSERT (s != NULL); 3046 3047 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to 3048 copy the initial value out of the dynamic object and into the 3049 runtime process image. We need to remember the offset into the 3050 .rela.bss section we are going to use. */ 3051 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 3052 { 3053 asection *srel; 3054 3055 srel = bfd_get_linker_section (dynobj, ".rela.bss"); 3056 BFD_ASSERT (srel != NULL); 3057 srel->size += sizeof (Elf32_External_Rela); 3058 h->needs_copy = 1; 3059 } 3060 3061 return _bfd_elf_adjust_dynamic_copy (h, s); 3062 } 3063 3064 /* Adjust our "subclass" elements for an indirect symbol. */ 3065 3066 static void 3067 elf_cris_copy_indirect_symbol (struct bfd_link_info *info, 3068 struct elf_link_hash_entry *dir, 3069 struct elf_link_hash_entry *ind) 3070 { 3071 struct elf_cris_link_hash_entry *edir, *eind; 3072 3073 edir = (struct elf_cris_link_hash_entry *) dir; 3074 eind = (struct elf_cris_link_hash_entry *) ind; 3075 3076 /* Only indirect symbols are replaced; we're not interested in 3077 updating any of EIND's fields for other symbols. */ 3078 if (eind->root.root.type != bfd_link_hash_indirect) 3079 { 3080 /* Still, we need to copy flags for e.g. weak definitions. */ 3081 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 3082 return; 3083 } 3084 3085 BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0); 3086 3087 #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z 3088 #define XMOVE(F) XMOVOPZ (F, +=, 0) 3089 if (eind->pcrel_relocs_copied != NULL) 3090 { 3091 if (edir->pcrel_relocs_copied != NULL) 3092 { 3093 struct elf_cris_pcrel_relocs_copied **pp; 3094 struct elf_cris_pcrel_relocs_copied *p; 3095 3096 /* Add reloc counts against the indirect sym to the direct sym 3097 list. Merge any entries against the same section. */ 3098 for (pp = &eind->pcrel_relocs_copied; *pp != NULL;) 3099 { 3100 struct elf_cris_pcrel_relocs_copied *q; 3101 p = *pp; 3102 for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next) 3103 if (q->section == p->section) 3104 { 3105 q->count += p->count; 3106 *pp = p->next; 3107 break; 3108 } 3109 if (q == NULL) 3110 pp = &p->next; 3111 } 3112 *pp = edir->pcrel_relocs_copied; 3113 } 3114 XMOVOPZ (pcrel_relocs_copied, =, NULL); 3115 } 3116 XMOVE (gotplt_refcount); 3117 XMOVE (gotplt_offset); 3118 XMOVE (reg_got_refcount); 3119 XMOVE (tprel_refcount); 3120 XMOVE (dtp_refcount); 3121 #undef XMOVE 3122 #undef XMOVOPZ 3123 3124 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 3125 } 3126 3127 /* Look through the relocs for a section during the first phase. */ 3128 3129 static bfd_boolean 3130 cris_elf_check_relocs (bfd *abfd, 3131 struct bfd_link_info *info, 3132 asection *sec, 3133 const Elf_Internal_Rela *relocs) 3134 { 3135 struct elf_cris_link_hash_table * htab; 3136 bfd *dynobj; 3137 Elf_Internal_Shdr *symtab_hdr; 3138 struct elf_link_hash_entry **sym_hashes; 3139 bfd_signed_vma *local_got_refcounts; 3140 const Elf_Internal_Rela *rel; 3141 const Elf_Internal_Rela *rel_end; 3142 asection *sgot; 3143 asection *srelgot; 3144 asection *sreloc; 3145 3146 if (info->relocatable) 3147 return TRUE; 3148 3149 htab = elf_cris_hash_table (info); 3150 if (htab == NULL) 3151 return FALSE; 3152 3153 dynobj = elf_hash_table (info)->dynobj; 3154 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 3155 sym_hashes = elf_sym_hashes (abfd); 3156 local_got_refcounts = elf_local_got_refcounts (abfd); 3157 3158 sgot = NULL; 3159 srelgot = NULL; 3160 sreloc = NULL; 3161 3162 rel_end = relocs + sec->reloc_count; 3163 for (rel = relocs; rel < rel_end; rel++) 3164 { 3165 struct elf_link_hash_entry *h; 3166 unsigned long r_symndx; 3167 enum elf_cris_reloc_type r_type; 3168 bfd_signed_vma got_element_size = 4; 3169 unsigned long r_symndx_lgot = INT_MAX; 3170 3171 r_symndx = ELF32_R_SYM (rel->r_info); 3172 if (r_symndx < symtab_hdr->sh_info) 3173 { 3174 h = NULL; 3175 r_symndx_lgot = LGOT_REG_NDX (r_symndx); 3176 } 3177 else 3178 { 3179 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3180 while (h->root.type == bfd_link_hash_indirect 3181 || h->root.type == bfd_link_hash_warning) 3182 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3183 } 3184 3185 r_type = ELF32_R_TYPE (rel->r_info); 3186 3187 /* Some relocs require linker-created sections; we need to hang them 3188 on the first input bfd we found that contained dynamic relocs. */ 3189 switch (r_type) 3190 { 3191 case R_CRIS_32_DTPREL: 3192 if ((sec->flags & SEC_ALLOC) == 0) 3193 /* This'd be a .dtpreld entry in e.g. debug info. We have 3194 several different switch statements below, but none of 3195 that is needed; we need no preparations for resolving 3196 R_CRIS_32_DTPREL into a non-allocated section (debug 3197 info), so let's just move on to the next 3198 relocation. */ 3199 continue; 3200 /* Fall through. */ 3201 case R_CRIS_16_DTPREL: 3202 /* The first .got.plt entry is right after the R_CRIS_DTPMOD 3203 entry at index 3. */ 3204 if (htab->dtpmod_refcount == 0) 3205 htab->next_gotplt_entry += 8; 3206 3207 htab->dtpmod_refcount++; 3208 /* Fall through. */ 3209 3210 case R_CRIS_32_IE: 3211 case R_CRIS_32_GD: 3212 case R_CRIS_16_GOT_GD: 3213 case R_CRIS_32_GOT_GD: 3214 case R_CRIS_32_GOT_TPREL: 3215 case R_CRIS_16_GOT_TPREL: 3216 case R_CRIS_16_GOT: 3217 case R_CRIS_32_GOT: 3218 case R_CRIS_32_GOTREL: 3219 case R_CRIS_32_PLT_GOTREL: 3220 case R_CRIS_32_PLT_PCREL: 3221 case R_CRIS_16_GOTPLT: 3222 case R_CRIS_32_GOTPLT: 3223 if (dynobj == NULL) 3224 { 3225 elf_hash_table (info)->dynobj = dynobj = abfd; 3226 3227 /* We could handle this if we can get a handle on the 3228 output bfd in elf_cris_adjust_dynamic_symbol. Failing 3229 that, we must insist on dynobj being a specific mach. */ 3230 if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32) 3231 { 3232 (*_bfd_error_handler) 3233 (_("%B, section %A:\n v10/v32 compatible object %s" 3234 " must not contain a PIC relocation"), 3235 abfd, sec); 3236 return FALSE; 3237 } 3238 3239 /* Create the .got section, so we can assume it's always 3240 present whenever there's a dynobj. */ 3241 if (!_bfd_elf_create_got_section (dynobj, info)) 3242 return FALSE; 3243 } 3244 3245 if (sgot == NULL) 3246 sgot = bfd_get_linker_section (dynobj, ".got"); 3247 3248 if (local_got_refcounts == NULL) 3249 { 3250 bfd_size_type amt; 3251 3252 /* We use index local_got_refcounts[-1] to count all 3253 GOT-relative relocations that do not have explicit 3254 GOT entries. */ 3255 amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1; 3256 amt *= sizeof (bfd_signed_vma); 3257 local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt)); 3258 if (local_got_refcounts == NULL) 3259 return FALSE; 3260 3261 local_got_refcounts++; 3262 elf_local_got_refcounts (abfd) = local_got_refcounts; 3263 } 3264 break; 3265 3266 default: 3267 break; 3268 } 3269 3270 /* Some relocs require a global offset table (but perhaps not a 3271 specific GOT entry). */ 3272 switch (r_type) 3273 { 3274 case R_CRIS_16_DTPREL: 3275 case R_CRIS_32_DTPREL: 3276 /* Not requesting .got.rela for an executable: the contents 3277 of the first entry is constant there. For a shared 3278 library, we need .got.rela for the R_CRIS_DTPMOD 3279 relocation at index 3. */ 3280 if (!info->shared) 3281 break; 3282 /* Fall through. */ 3283 3284 case R_CRIS_32_IE: 3285 case R_CRIS_32_GD: 3286 case R_CRIS_16_GOT_GD: 3287 case R_CRIS_32_GOT_GD: 3288 case R_CRIS_32_GOT_TPREL: 3289 case R_CRIS_16_GOT_TPREL: 3290 /* Fall through. */ 3291 3292 /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT 3293 entry only for local symbols. Unfortunately, we don't know 3294 until later on if there's a version script that forces the 3295 symbol local. We must have the .rela.got section in place 3296 before we know if the symbol looks global now, so we need 3297 to treat the reloc just like for R_CRIS_16_GOT and 3298 R_CRIS_32_GOT. */ 3299 case R_CRIS_16_GOTPLT: 3300 case R_CRIS_32_GOTPLT: 3301 case R_CRIS_16_GOT: 3302 case R_CRIS_32_GOT: 3303 if (srelgot == NULL 3304 && (h != NULL || info->shared)) 3305 { 3306 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 3307 if (srelgot == NULL) 3308 { 3309 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 3310 | SEC_IN_MEMORY | SEC_LINKER_CREATED 3311 | SEC_READONLY); 3312 srelgot = bfd_make_section_anyway_with_flags (dynobj, 3313 ".rela.got", 3314 flags); 3315 if (srelgot == NULL 3316 || !bfd_set_section_alignment (dynobj, srelgot, 2)) 3317 return FALSE; 3318 } 3319 } 3320 break; 3321 3322 default: 3323 break; 3324 } 3325 3326 /* Warn and error for invalid input. */ 3327 switch (r_type) 3328 { 3329 case R_CRIS_32_IE: 3330 case R_CRIS_32_TPREL: 3331 case R_CRIS_16_TPREL: 3332 case R_CRIS_32_GD: 3333 if (info->shared) 3334 { 3335 (*_bfd_error_handler) 3336 (_("%B, section %A:\n relocation %s not valid" 3337 " in a shared object;" 3338 " typically an option mixup, recompile with -fPIC"), 3339 abfd, 3340 sec, 3341 cris_elf_howto_table[r_type].name); 3342 /* Don't return FALSE here; we want messages for all of 3343 these and the error behavior is ungraceful 3344 anyway. */ 3345 } 3346 default: 3347 break; 3348 } 3349 3350 switch (r_type) 3351 { 3352 case R_CRIS_32_GD: 3353 case R_CRIS_16_GOT_GD: 3354 case R_CRIS_32_GOT_GD: 3355 /* These are requests for tls_index entries, run-time R_CRIS_DTP. */ 3356 got_element_size = 8; 3357 r_symndx_lgot = LGOT_DTP_NDX (r_symndx); 3358 break; 3359 3360 case R_CRIS_16_DTPREL: 3361 case R_CRIS_32_DTPREL: 3362 /* These two just request for the constant-index 3363 module-local tls_index-sized GOT entry, which we add 3364 elsewhere. */ 3365 break; 3366 3367 case R_CRIS_32_IE: 3368 case R_CRIS_32_GOT_TPREL: 3369 case R_CRIS_16_GOT_TPREL: 3370 r_symndx_lgot = LGOT_TPREL_NDX (r_symndx); 3371 3372 /* Those relocs also require that a DSO is of type 3373 Initial Exec. Like other targets, we don't reset this 3374 flag even if the relocs are GC:ed away. */ 3375 if (info->shared) 3376 info->flags |= DF_STATIC_TLS; 3377 break; 3378 3379 /* Let's list the other assembler-generated TLS-relocs too, 3380 just to show that they're not forgotten. */ 3381 case R_CRIS_16_TPREL: 3382 case R_CRIS_32_TPREL: 3383 default: 3384 break; 3385 } 3386 3387 switch (r_type) 3388 { 3389 case R_CRIS_16_GOTPLT: 3390 case R_CRIS_32_GOTPLT: 3391 /* Mark that we need a GOT entry if the PLT entry (and its GOT 3392 entry) is eliminated. We can only do this for a non-local 3393 symbol. */ 3394 if (h != NULL) 3395 { 3396 elf_cris_hash_entry (h)->gotplt_refcount++; 3397 goto handle_gotplt_reloc; 3398 } 3399 /* If h is NULL then this is a local symbol, and we must make a 3400 GOT entry for it, so handle it like a GOT reloc. */ 3401 /* Fall through. */ 3402 3403 case R_CRIS_32_IE: 3404 case R_CRIS_32_GD: 3405 case R_CRIS_16_GOT_GD: 3406 case R_CRIS_32_GOT_GD: 3407 case R_CRIS_32_GOT_TPREL: 3408 case R_CRIS_16_GOT_TPREL: 3409 case R_CRIS_16_GOT: 3410 case R_CRIS_32_GOT: 3411 /* This symbol requires a global offset table entry. */ 3412 if (h != NULL) 3413 { 3414 if (h->got.refcount == 0) 3415 { 3416 /* Make sure this symbol is output as a dynamic symbol. */ 3417 if (h->dynindx == -1) 3418 { 3419 if (!bfd_elf_link_record_dynamic_symbol (info, h)) 3420 return FALSE; 3421 } 3422 } 3423 3424 /* Update the sum of reloc counts for this symbol. */ 3425 h->got.refcount++; 3426 3427 switch (r_type) 3428 { 3429 case R_CRIS_16_GOT: 3430 case R_CRIS_32_GOT: 3431 if (elf_cris_hash_entry (h)->reg_got_refcount == 0) 3432 { 3433 /* Allocate space in the .got section. */ 3434 sgot->size += got_element_size; 3435 /* Allocate relocation space. */ 3436 srelgot->size += sizeof (Elf32_External_Rela); 3437 } 3438 elf_cris_hash_entry (h)->reg_got_refcount++; 3439 break; 3440 3441 case R_CRIS_32_GD: 3442 case R_CRIS_16_GOT_GD: 3443 case R_CRIS_32_GOT_GD: 3444 if (elf_cris_hash_entry (h)->dtp_refcount == 0) 3445 { 3446 /* Allocate space in the .got section. */ 3447 sgot->size += got_element_size; 3448 /* Allocate relocation space. */ 3449 srelgot->size += sizeof (Elf32_External_Rela); 3450 } 3451 elf_cris_hash_entry (h)->dtp_refcount++; 3452 break; 3453 3454 case R_CRIS_32_IE: 3455 case R_CRIS_32_GOT_TPREL: 3456 case R_CRIS_16_GOT_TPREL: 3457 if (elf_cris_hash_entry (h)->tprel_refcount == 0) 3458 { 3459 /* Allocate space in the .got section. */ 3460 sgot->size += got_element_size; 3461 /* Allocate relocation space. */ 3462 srelgot->size += sizeof (Elf32_External_Rela); 3463 } 3464 elf_cris_hash_entry (h)->tprel_refcount++; 3465 break; 3466 3467 default: 3468 BFD_FAIL (); 3469 break; 3470 } 3471 } 3472 else 3473 { 3474 /* This is a global offset table entry for a local symbol. */ 3475 if (local_got_refcounts[r_symndx_lgot] == 0) 3476 { 3477 sgot->size += got_element_size; 3478 if (info->shared) 3479 { 3480 /* If we are generating a shared object, we need 3481 to output a R_CRIS_RELATIVE reloc so that the 3482 dynamic linker can adjust this GOT entry. 3483 Similarly for non-regular got entries. */ 3484 srelgot->size += sizeof (Elf32_External_Rela); 3485 } 3486 } 3487 /* Update the reloc-specific count. */ 3488 local_got_refcounts[r_symndx_lgot]++; 3489 3490 /* This one is the sum of all the others. */ 3491 local_got_refcounts[r_symndx]++; 3492 } 3493 break; 3494 3495 case R_CRIS_16_DTPREL: 3496 case R_CRIS_32_DTPREL: 3497 case R_CRIS_32_GOTREL: 3498 /* This reference requires a global offset table. 3499 FIXME: The actual refcount isn't used currently; the .got 3500 section can't be removed if there were any references in the 3501 input. */ 3502 local_got_refcounts[-1]++; 3503 break; 3504 3505 handle_gotplt_reloc: 3506 3507 case R_CRIS_32_PLT_GOTREL: 3508 /* This reference requires a global offset table. */ 3509 local_got_refcounts[-1]++; 3510 /* Fall through. */ 3511 3512 case R_CRIS_32_PLT_PCREL: 3513 /* This symbol requires a procedure linkage table entry. We 3514 actually build the entry in adjust_dynamic_symbol, 3515 because this might be a case of linking PIC code which is 3516 never referenced by a dynamic object, in which case we 3517 don't need to generate a procedure linkage table entry 3518 after all. */ 3519 3520 /* Beware: if we'd check for visibility of the symbol here 3521 (and not marking the need for a PLT when non-visible), we'd 3522 get into trouble with keeping handling consistent with 3523 regards to relocs found before definition and GOTPLT 3524 handling. Eliminable PLT entries will be dealt with later 3525 anyway. */ 3526 if (h == NULL) 3527 continue; 3528 3529 h->needs_plt = 1; 3530 h->plt.refcount++; 3531 break; 3532 3533 case R_CRIS_8: 3534 case R_CRIS_16: 3535 case R_CRIS_32: 3536 /* Let's help debug shared library creation. Any of these 3537 relocs *can* be used in shared libs, but pages containing 3538 them cannot be shared, so they're not appropriate for 3539 common use. Don't warn for sections we don't care about, 3540 such as debug sections or non-constant sections. We 3541 can't help tables of (global) function pointers, for 3542 example, though they must be emitted in a (writable) data 3543 section to avoid having impure text sections. */ 3544 if (info->shared 3545 && (sec->flags & SEC_ALLOC) != 0 3546 && (sec->flags & SEC_READONLY) != 0) 3547 { 3548 /* FIXME: How do we make this optionally a warning only? */ 3549 (*_bfd_error_handler) 3550 (_("%B, section %A:\n relocation %s should not" 3551 " be used in a shared object; recompile with -fPIC"), 3552 abfd, 3553 sec, 3554 cris_elf_howto_table[r_type].name); 3555 } 3556 3557 /* We don't need to handle relocs into sections not going into 3558 the "real" output. */ 3559 if ((sec->flags & SEC_ALLOC) == 0) 3560 break; 3561 3562 if (h != NULL) 3563 { 3564 h->non_got_ref = 1; 3565 3566 /* Make sure a plt entry is created for this symbol if it 3567 turns out to be a function defined by a dynamic object. */ 3568 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) 3569 h->plt.refcount++; 3570 } 3571 3572 /* If we are creating a shared library and this is not a local 3573 symbol, we need to copy the reloc into the shared library. 3574 However when linking with -Bsymbolic and this is a global 3575 symbol which is defined in an object we are including in the 3576 link (i.e., DEF_REGULAR is set), then we can resolve the 3577 reloc directly. At this point we have not seen all the input 3578 files, so it is possible that DEF_REGULAR is not set now but 3579 will be set later (it is never cleared). In case of a weak 3580 definition, DEF_REGULAR may be cleared later by a strong 3581 definition in a shared library. We account for that 3582 possibility below by storing information in the relocs_copied 3583 field of the hash table entry. A similar situation occurs 3584 when creating shared libraries and symbol visibility changes 3585 render the symbol local. */ 3586 3587 /* No need to do anything if we're not creating a shared object. */ 3588 if (! info->shared) 3589 break; 3590 3591 /* We may need to create a reloc section in the dynobj and made room 3592 for this reloc. */ 3593 if (sreloc == NULL) 3594 { 3595 sreloc = _bfd_elf_make_dynamic_reloc_section 3596 (sec, dynobj, 2, abfd, /*rela?*/ TRUE); 3597 3598 if (sreloc == NULL) 3599 return FALSE; 3600 } 3601 3602 if (sec->flags & SEC_READONLY) 3603 info->flags |= DF_TEXTREL; 3604 3605 sreloc->size += sizeof (Elf32_External_Rela); 3606 break; 3607 3608 case R_CRIS_8_PCREL: 3609 case R_CRIS_16_PCREL: 3610 case R_CRIS_32_PCREL: 3611 if (h != NULL) 3612 { 3613 h->non_got_ref = 1; 3614 3615 /* Make sure a plt entry is created for this symbol if it 3616 turns out to be a function defined by a dynamic object. */ 3617 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) 3618 h->plt.refcount++; 3619 } 3620 3621 /* If we are creating a shared library and this is not a local 3622 symbol, we need to copy the reloc into the shared library. 3623 However when linking with -Bsymbolic and this is a global 3624 symbol which is defined in an object we are including in the 3625 link (i.e., DEF_REGULAR is set), then we can resolve the 3626 reloc directly. At this point we have not seen all the input 3627 files, so it is possible that DEF_REGULAR is not set now but 3628 will be set later (it is never cleared). In case of a weak 3629 definition, DEF_REGULAR may be cleared later by a strong 3630 definition in a shared library. We account for that 3631 possibility below by storing information in the relocs_copied 3632 field of the hash table entry. A similar situation occurs 3633 when creating shared libraries and symbol visibility changes 3634 render the symbol local. */ 3635 3636 /* No need to do anything if we're not creating a shared object. */ 3637 if (! info->shared) 3638 break; 3639 3640 /* We don't need to handle relocs into sections not going into 3641 the "real" output. */ 3642 if ((sec->flags & SEC_ALLOC) == 0) 3643 break; 3644 3645 /* If the symbol is local, then we know already we can 3646 eliminate the reloc. */ 3647 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 3648 break; 3649 3650 /* If this is with -Bsymbolic and the symbol isn't weak, and 3651 is defined by an ordinary object (the ones we include in 3652 this shared library) then we can also eliminate the 3653 reloc. See comment above for more eliminable cases which 3654 we can't identify at this time. */ 3655 if (info->symbolic 3656 && h->root.type != bfd_link_hash_defweak 3657 && h->def_regular) 3658 break; 3659 3660 /* We may need to create a reloc section in the dynobj and made room 3661 for this reloc. */ 3662 if (sreloc == NULL) 3663 { 3664 sreloc = _bfd_elf_make_dynamic_reloc_section 3665 (sec, dynobj, 2, abfd, /*rela?*/ TRUE); 3666 3667 if (sreloc == NULL) 3668 return FALSE; 3669 } 3670 3671 sreloc->size += sizeof (Elf32_External_Rela); 3672 3673 /* We count the number of PC relative relocations we have 3674 entered for this symbol, so that we can discard them 3675 again if the symbol is later defined by a regular object. 3676 We know that h is really a pointer to an 3677 elf_cris_link_hash_entry. */ 3678 { 3679 struct elf_cris_link_hash_entry *eh; 3680 struct elf_cris_pcrel_relocs_copied *p; 3681 3682 eh = elf_cris_hash_entry (h); 3683 3684 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) 3685 if (p->section == sec) 3686 break; 3687 3688 if (p == NULL) 3689 { 3690 p = ((struct elf_cris_pcrel_relocs_copied *) 3691 bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); 3692 if (p == NULL) 3693 return FALSE; 3694 p->next = eh->pcrel_relocs_copied; 3695 eh->pcrel_relocs_copied = p; 3696 p->section = sec; 3697 p->count = 0; 3698 p->r_type = r_type; 3699 } 3700 3701 ++p->count; 3702 } 3703 break; 3704 3705 /* This relocation describes the C++ object vtable hierarchy. 3706 Reconstruct it for later use during GC. */ 3707 case R_CRIS_GNU_VTINHERIT: 3708 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 3709 return FALSE; 3710 break; 3711 3712 /* This relocation describes which C++ vtable entries are actually 3713 used. Record for later use during GC. */ 3714 case R_CRIS_GNU_VTENTRY: 3715 BFD_ASSERT (h != NULL); 3716 if (h != NULL 3717 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 3718 return FALSE; 3719 break; 3720 3721 case R_CRIS_16_TPREL: 3722 case R_CRIS_32_TPREL: 3723 /* Already warned above, when necessary. */ 3724 break; 3725 3726 default: 3727 /* Other relocs do not appear here. */ 3728 bfd_set_error (bfd_error_bad_value); 3729 return FALSE; 3730 } 3731 } 3732 3733 return TRUE; 3734 } 3735 3736 /* Set the sizes of the dynamic sections. */ 3737 3738 static bfd_boolean 3739 elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 3740 struct bfd_link_info *info) 3741 { 3742 struct elf_cris_link_hash_table * htab; 3743 bfd *dynobj; 3744 asection *s; 3745 bfd_boolean plt; 3746 bfd_boolean relocs; 3747 3748 htab = elf_cris_hash_table (info); 3749 if (htab == NULL) 3750 return FALSE; 3751 3752 dynobj = elf_hash_table (info)->dynobj; 3753 BFD_ASSERT (dynobj != NULL); 3754 3755 if (elf_hash_table (info)->dynamic_sections_created) 3756 { 3757 /* Set the contents of the .interp section to the interpreter. */ 3758 if (info->executable) 3759 { 3760 s = bfd_get_linker_section (dynobj, ".interp"); 3761 BFD_ASSERT (s != NULL); 3762 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 3763 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 3764 } 3765 } 3766 else 3767 { 3768 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */ 3769 elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got, 3770 info); 3771 3772 /* We may have created entries in the .rela.got section. 3773 However, if we are not creating the dynamic sections, we will 3774 not actually use these entries. Reset the size of .rela.got, 3775 which will cause it to get stripped from the output file 3776 below. */ 3777 s = bfd_get_linker_section (dynobj, ".rela.got"); 3778 if (s != NULL) 3779 s->size = 0; 3780 } 3781 3782 /* If this is a -Bsymbolic shared link, then we need to discard all PC 3783 relative relocs against symbols defined in a regular object. We 3784 allocated space for them in the check_relocs routine, but we will not 3785 fill them in in the relocate_section routine. We also discard space 3786 for relocs that have become for local symbols due to symbol 3787 visibility changes. For programs, we discard space for relocs for 3788 symbols not referenced by any dynamic object. */ 3789 if (info->shared) 3790 elf_cris_link_hash_traverse (htab, 3791 elf_cris_discard_excess_dso_dynamics, 3792 info); 3793 else 3794 elf_cris_link_hash_traverse (htab, 3795 elf_cris_discard_excess_program_dynamics, 3796 info); 3797 3798 /* The check_relocs and adjust_dynamic_symbol entry points have 3799 determined the sizes of the various dynamic sections. Allocate 3800 memory for them. */ 3801 plt = FALSE; 3802 relocs = FALSE; 3803 for (s = dynobj->sections; s != NULL; s = s->next) 3804 { 3805 const char *name; 3806 3807 if ((s->flags & SEC_LINKER_CREATED) == 0) 3808 continue; 3809 3810 /* It's OK to base decisions on the section name, because none 3811 of the dynobj section names depend upon the input files. */ 3812 name = bfd_get_section_name (dynobj, s); 3813 3814 if (strcmp (name, ".plt") == 0) 3815 { 3816 /* Remember whether there is a PLT. */ 3817 plt = s->size != 0; 3818 } 3819 else if (strcmp (name, ".got.plt") == 0) 3820 { 3821 /* The .got.plt contains the .got header as well as the 3822 actual .got.plt contents. The .got header may contain a 3823 R_CRIS_DTPMOD entry at index 3. */ 3824 s->size += htab->dtpmod_refcount != 0 3825 ? 8 : 0; 3826 } 3827 else if (CONST_STRNEQ (name, ".rela")) 3828 { 3829 if (strcmp (name, ".rela.got") == 0 3830 && htab->dtpmod_refcount != 0 3831 && info->shared) 3832 s->size += sizeof (Elf32_External_Rela); 3833 3834 if (s->size != 0) 3835 { 3836 /* Remember whether there are any reloc sections other 3837 than .rela.plt. */ 3838 if (strcmp (name, ".rela.plt") != 0) 3839 relocs = TRUE; 3840 3841 /* We use the reloc_count field as a counter if we need 3842 to copy relocs into the output file. */ 3843 s->reloc_count = 0; 3844 } 3845 } 3846 else if (! CONST_STRNEQ (name, ".got") 3847 && strcmp (name, ".dynbss") != 0) 3848 { 3849 /* It's not one of our sections, so don't allocate space. */ 3850 continue; 3851 } 3852 3853 if (s->size == 0) 3854 { 3855 /* If we don't need this section, strip it from the 3856 output file. This is mostly to handle .rela.bss and 3857 .rela.plt. We must create both sections in 3858 create_dynamic_sections, because they must be created 3859 before the linker maps input sections to output 3860 sections. The linker does that before 3861 adjust_dynamic_symbol is called, and it is that 3862 function which decides whether anything needs to go 3863 into these sections. */ 3864 s->flags |= SEC_EXCLUDE; 3865 continue; 3866 } 3867 3868 if ((s->flags & SEC_HAS_CONTENTS) == 0) 3869 continue; 3870 3871 /* Allocate memory for the section contents. We use bfd_zalloc here 3872 in case unused entries are not reclaimed before the section's 3873 contents are written out. This should not happen, but this way 3874 if it does, we will not write out garbage. For reloc sections, 3875 this will make entries have the type R_CRIS_NONE. */ 3876 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 3877 if (s->contents == NULL) 3878 return FALSE; 3879 } 3880 3881 if (elf_hash_table (info)->dynamic_sections_created) 3882 { 3883 /* Add some entries to the .dynamic section. We fill in the 3884 values later, in elf_cris_finish_dynamic_sections, but we 3885 must add the entries now so that we get the correct size for 3886 the .dynamic section. The DT_DEBUG entry is filled in by the 3887 dynamic linker and used by the debugger. */ 3888 #define add_dynamic_entry(TAG, VAL) \ 3889 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 3890 3891 if (!info->shared) 3892 { 3893 if (!add_dynamic_entry (DT_DEBUG, 0)) 3894 return FALSE; 3895 } 3896 3897 if (plt) 3898 { 3899 if (!add_dynamic_entry (DT_PLTGOT, 0) 3900 || !add_dynamic_entry (DT_PLTRELSZ, 0) 3901 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 3902 || !add_dynamic_entry (DT_JMPREL, 0)) 3903 return FALSE; 3904 } 3905 3906 if (relocs) 3907 { 3908 if (!add_dynamic_entry (DT_RELA, 0) 3909 || !add_dynamic_entry (DT_RELASZ, 0) 3910 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 3911 return FALSE; 3912 } 3913 3914 if ((info->flags & DF_TEXTREL) != 0) 3915 { 3916 if (!add_dynamic_entry (DT_TEXTREL, 0)) 3917 return FALSE; 3918 info->flags |= DF_TEXTREL; 3919 } 3920 } 3921 #undef add_dynamic_entry 3922 3923 return TRUE; 3924 } 3925 3926 /* This function is called via elf_cris_link_hash_traverse if we are 3927 creating a shared object. In the -Bsymbolic case, it discards the 3928 space allocated to copy PC relative relocs against symbols which 3929 are defined in regular objects. For the normal non-symbolic case, 3930 we also discard space for relocs that have become local due to 3931 symbol visibility changes. We allocated space for them in the 3932 check_relocs routine, but we won't fill them in in the 3933 relocate_section routine. */ 3934 3935 static bfd_boolean 3936 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *h, 3937 void * inf) 3938 { 3939 struct elf_cris_pcrel_relocs_copied *s; 3940 struct bfd_link_info *info = (struct bfd_link_info *) inf; 3941 3942 /* If a symbol has been forced local or we have found a regular 3943 definition for the symbolic link case, then we won't be needing 3944 any relocs. */ 3945 if (h->root.def_regular 3946 && (h->root.forced_local 3947 || info->symbolic)) 3948 { 3949 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) 3950 { 3951 asection *sreloc 3952 = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info) 3953 ->dynobj, 3954 s->section, 3955 /*rela?*/ TRUE); 3956 sreloc->size -= s->count * sizeof (Elf32_External_Rela); 3957 } 3958 return TRUE; 3959 } 3960 3961 /* If we have accounted for PC-relative relocs for read-only 3962 sections, now is the time to warn for them. We can't do it in 3963 cris_elf_check_relocs, because we don't know the status of all 3964 symbols at that time (and it's common to force symbols local 3965 late). */ 3966 3967 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) 3968 if ((s->section->flags & SEC_READONLY) != 0) 3969 { 3970 /* FIXME: How do we make this optionally a warning only? */ 3971 (*_bfd_error_handler) 3972 (_("%B, section `%A', to symbol `%s':\n" 3973 " relocation %s should not be used" 3974 " in a shared object; recompile with -fPIC"), 3975 s->section->owner, 3976 s->section, 3977 h->root.root.root.string, 3978 cris_elf_howto_table[s->r_type].name); 3979 3980 info->flags |= DF_TEXTREL; 3981 } 3982 3983 return TRUE; 3984 } 3985 3986 /* This function is called via elf_cris_link_hash_traverse if we are *not* 3987 creating a shared object. We discard space for relocs for symbols put 3988 in the .got, but which we found we do not have to resolve at run-time. */ 3989 3990 static bfd_boolean 3991 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *h, 3992 void * inf) 3993 { 3994 struct bfd_link_info *info = (struct bfd_link_info *) inf; 3995 3996 /* If we're not creating a shared library and have a symbol which is 3997 referred to by .got references, but the symbol is defined locally, 3998 (or rather, not defined by a DSO) then lose the reloc for the .got 3999 (don't allocate room for it). Likewise for relocs for something 4000 for which we create a PLT. */ 4001 if (!h->root.def_dynamic 4002 || h->root.plt.refcount > 0) 4003 { 4004 if (h->reg_got_refcount > 0 4005 /* The size of this section is only valid and in sync with the 4006 various reference counts if we do dynamic; don't decrement it 4007 otherwise. */ 4008 && elf_hash_table (info)->dynamic_sections_created) 4009 { 4010 bfd *dynobj = elf_hash_table (info)->dynobj; 4011 asection *srelgot; 4012 4013 BFD_ASSERT (dynobj != NULL); 4014 4015 srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 4016 4017 BFD_ASSERT (srelgot != NULL); 4018 4019 srelgot->size -= sizeof (Elf32_External_Rela); 4020 } 4021 4022 /* If the locally-defined symbol isn't used by a DSO, then we don't 4023 have to export it as a dynamic symbol. This was already done for 4024 functions; doing this for all symbols would presumably not 4025 introduce new problems. Of course we don't do this if we're 4026 exporting all dynamic symbols. */ 4027 if (! info->export_dynamic 4028 && h->root.dynindx != -1 4029 && !h->root.def_dynamic 4030 && !h->root.ref_dynamic) 4031 { 4032 h->root.dynindx = -1; 4033 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 4034 h->root.dynstr_index); 4035 } 4036 } 4037 4038 return TRUE; 4039 } 4040 4041 /* Reject a file depending on presence and expectation of prefixed 4042 underscores on symbols. */ 4043 4044 static bfd_boolean 4045 cris_elf_object_p (bfd *abfd) 4046 { 4047 if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags)) 4048 return FALSE; 4049 4050 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)) 4051 return (bfd_get_symbol_leading_char (abfd) == '_'); 4052 else 4053 return (bfd_get_symbol_leading_char (abfd) == 0); 4054 } 4055 4056 /* Mark presence or absence of leading underscore. Set machine type 4057 flags from mach type. */ 4058 4059 static void 4060 cris_elf_final_write_processing (bfd *abfd, 4061 bfd_boolean linker ATTRIBUTE_UNUSED) 4062 { 4063 unsigned long e_flags = elf_elfheader (abfd)->e_flags; 4064 4065 e_flags &= ~EF_CRIS_UNDERSCORE; 4066 if (bfd_get_symbol_leading_char (abfd) == '_') 4067 e_flags |= EF_CRIS_UNDERSCORE; 4068 4069 switch (bfd_get_mach (abfd)) 4070 { 4071 case bfd_mach_cris_v0_v10: 4072 e_flags |= EF_CRIS_VARIANT_ANY_V0_V10; 4073 break; 4074 4075 case bfd_mach_cris_v10_v32: 4076 e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32; 4077 break; 4078 4079 case bfd_mach_cris_v32: 4080 e_flags |= EF_CRIS_VARIANT_V32; 4081 break; 4082 4083 default: 4084 _bfd_abort (__FILE__, __LINE__, 4085 _("Unexpected machine number")); 4086 } 4087 4088 elf_elfheader (abfd)->e_flags = e_flags; 4089 } 4090 4091 /* Set the mach type from e_flags value. */ 4092 4093 static bfd_boolean 4094 cris_elf_set_mach_from_flags (bfd *abfd, 4095 unsigned long flags) 4096 { 4097 switch (flags & EF_CRIS_VARIANT_MASK) 4098 { 4099 case EF_CRIS_VARIANT_ANY_V0_V10: 4100 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10); 4101 break; 4102 4103 case EF_CRIS_VARIANT_V32: 4104 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32); 4105 break; 4106 4107 case EF_CRIS_VARIANT_COMMON_V10_V32: 4108 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32); 4109 break; 4110 4111 default: 4112 /* Since we don't recognize them, we obviously can't support them 4113 with this code; we'd have to require that all future handling 4114 would be optional. */ 4115 bfd_set_error (bfd_error_wrong_format); 4116 return FALSE; 4117 } 4118 4119 return TRUE; 4120 } 4121 4122 /* Display the flags field. */ 4123 4124 static bfd_boolean 4125 cris_elf_print_private_bfd_data (bfd *abfd, void * ptr) 4126 { 4127 FILE *file = (FILE *) ptr; 4128 4129 BFD_ASSERT (abfd != NULL && ptr != NULL); 4130 4131 _bfd_elf_print_private_bfd_data (abfd, ptr); 4132 4133 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); 4134 4135 if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE) 4136 fprintf (file, _(" [symbols have a _ prefix]")); 4137 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK) 4138 == EF_CRIS_VARIANT_COMMON_V10_V32) 4139 fprintf (file, _(" [v10 and v32]")); 4140 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK) 4141 == EF_CRIS_VARIANT_V32) 4142 fprintf (file, _(" [v32]")); 4143 4144 fputc ('\n', file); 4145 return TRUE; 4146 } 4147 4148 /* Don't mix files with and without a leading underscore. */ 4149 4150 static bfd_boolean 4151 cris_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 4152 { 4153 int imach, omach; 4154 4155 if (! _bfd_generic_verify_endian_match (ibfd, obfd)) 4156 return FALSE; 4157 4158 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 4159 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 4160 return TRUE; 4161 4162 imach = bfd_get_mach (ibfd); 4163 4164 if (! elf_flags_init (obfd)) 4165 { 4166 /* This happens when ld starts out with a 'blank' output file. */ 4167 elf_flags_init (obfd) = TRUE; 4168 4169 /* We ignore the linker-set mach, and instead set it according to 4170 the first input file. This would also happen if we could 4171 somehow filter out the OUTPUT_ARCH () setting from elf.sc. 4172 This allows us to keep the same linker config across 4173 cris(v0..v10) and crisv32. The drawback is that we can't force 4174 the output type, which might be a sane thing to do for a 4175 v10+v32 compatibility object. */ 4176 if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach)) 4177 return FALSE; 4178 } 4179 4180 if (bfd_get_symbol_leading_char (ibfd) 4181 != bfd_get_symbol_leading_char (obfd)) 4182 { 4183 (*_bfd_error_handler) 4184 (bfd_get_symbol_leading_char (ibfd) == '_' 4185 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols") 4186 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"), 4187 ibfd); 4188 bfd_set_error (bfd_error_bad_value); 4189 return FALSE; 4190 } 4191 4192 omach = bfd_get_mach (obfd); 4193 4194 if (imach != omach) 4195 { 4196 /* We can get an incompatible combination only if either is 4197 bfd_mach_cris_v32, and the other one isn't compatible. */ 4198 if ((imach == bfd_mach_cris_v32 4199 && omach != bfd_mach_cris_v10_v32) 4200 || (omach == bfd_mach_cris_v32 4201 && imach != bfd_mach_cris_v10_v32)) 4202 { 4203 (*_bfd_error_handler) 4204 ((imach == bfd_mach_cris_v32) 4205 ? _("%B contains CRIS v32 code, incompatible" 4206 " with previous objects") 4207 : _("%B contains non-CRIS-v32 code, incompatible" 4208 " with previous objects"), 4209 ibfd); 4210 bfd_set_error (bfd_error_bad_value); 4211 return FALSE; 4212 } 4213 4214 /* We don't have to check the case where the input is compatible 4215 with v10 and v32, because the output is already known to be set 4216 to the other (compatible) mach. */ 4217 if (omach == bfd_mach_cris_v10_v32 4218 && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach)) 4219 return FALSE; 4220 } 4221 4222 return TRUE; 4223 } 4224 4225 /* Do side-effects of e_flags copying to obfd. */ 4226 4227 static bfd_boolean 4228 cris_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) 4229 { 4230 /* Call the base function. */ 4231 if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd)) 4232 return FALSE; 4233 4234 /* If output is big-endian for some obscure reason, stop here. */ 4235 if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE) 4236 return FALSE; 4237 4238 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 4239 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 4240 return TRUE; 4241 4242 /* Do what we really came here for. */ 4243 return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd)); 4244 } 4245 4246 static enum elf_reloc_type_class 4247 elf_cris_reloc_type_class (const Elf_Internal_Rela *rela) 4248 { 4249 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info); 4250 switch (r_type) 4251 { 4252 case R_CRIS_RELATIVE: 4253 return reloc_class_relative; 4254 case R_CRIS_JUMP_SLOT: 4255 return reloc_class_plt; 4256 case R_CRIS_COPY: 4257 return reloc_class_copy; 4258 default: 4259 return reloc_class_normal; 4260 } 4261 } 4262 4263 /* The elf_backend_got_elt_size worker. For one symbol, we can have up to 4264 two GOT entries from three types with two different sizes. We handle 4265 it as a single entry, so we can use the regular offset-calculation 4266 machinery. */ 4267 4268 static bfd_vma 4269 elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED, 4270 struct bfd_link_info *info ATTRIBUTE_UNUSED, 4271 struct elf_link_hash_entry *hr, 4272 bfd *ibfd, 4273 unsigned long symndx) 4274 { 4275 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr; 4276 bfd_vma eltsiz = 0; 4277 4278 /* We may have one regular GOT entry or up to two TLS GOT 4279 entries. */ 4280 if (h == NULL) 4281 { 4282 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 4283 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd); 4284 4285 BFD_ASSERT (local_got_refcounts != NULL); 4286 4287 if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0) 4288 { 4289 /* We can't have a variable referred to both as a regular 4290 variable and through TLS relocs. */ 4291 BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0 4292 && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0); 4293 return 4; 4294 } 4295 4296 if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0) 4297 eltsiz += 8; 4298 4299 if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0) 4300 eltsiz += 4; 4301 } 4302 else 4303 { 4304 struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h); 4305 if (hh->reg_got_refcount > 0) 4306 { 4307 /* The actual error-on-input is emitted elsewhere. */ 4308 BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0); 4309 return 4; 4310 } 4311 4312 if (hh->dtp_refcount > 0) 4313 eltsiz += 8; 4314 4315 if (hh->tprel_refcount > 0) 4316 eltsiz += 4; 4317 } 4318 4319 /* We're only called when h->got.refcount is non-zero, so we must 4320 have a non-zero size. */ 4321 BFD_ASSERT (eltsiz != 0); 4322 return eltsiz; 4323 } 4324 4325 #define ELF_ARCH bfd_arch_cris 4326 #define ELF_TARGET_ID CRIS_ELF_DATA 4327 #define ELF_MACHINE_CODE EM_CRIS 4328 #define ELF_MAXPAGESIZE 0x2000 4329 4330 #define TARGET_LITTLE_SYM bfd_elf32_cris_vec 4331 #define TARGET_LITTLE_NAME "elf32-cris" 4332 #define elf_symbol_leading_char 0 4333 4334 #define elf_info_to_howto_rel NULL 4335 #define elf_info_to_howto cris_info_to_howto_rela 4336 #define elf_backend_relocate_section cris_elf_relocate_section 4337 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook 4338 #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook 4339 #define elf_backend_plt_sym_val cris_elf_plt_sym_val 4340 #define elf_backend_check_relocs cris_elf_check_relocs 4341 #define elf_backend_grok_prstatus cris_elf_grok_prstatus 4342 #define elf_backend_grok_psinfo cris_elf_grok_psinfo 4343 4344 #define elf_backend_can_gc_sections 1 4345 #define elf_backend_can_refcount 1 4346 4347 #define elf_backend_object_p cris_elf_object_p 4348 #define elf_backend_final_write_processing \ 4349 cris_elf_final_write_processing 4350 #define bfd_elf32_bfd_print_private_bfd_data \ 4351 cris_elf_print_private_bfd_data 4352 #define bfd_elf32_bfd_merge_private_bfd_data \ 4353 cris_elf_merge_private_bfd_data 4354 #define bfd_elf32_bfd_copy_private_bfd_data \ 4355 cris_elf_copy_private_bfd_data 4356 4357 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup 4358 #define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup 4359 4360 #define bfd_elf32_bfd_link_hash_table_create \ 4361 elf_cris_link_hash_table_create 4362 #define elf_backend_adjust_dynamic_symbol \ 4363 elf_cris_adjust_dynamic_symbol 4364 #define elf_backend_copy_indirect_symbol \ 4365 elf_cris_copy_indirect_symbol 4366 #define elf_backend_size_dynamic_sections \ 4367 elf_cris_size_dynamic_sections 4368 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 4369 #define elf_backend_finish_dynamic_symbol \ 4370 elf_cris_finish_dynamic_symbol 4371 #define elf_backend_finish_dynamic_sections \ 4372 elf_cris_finish_dynamic_sections 4373 #define elf_backend_create_dynamic_sections \ 4374 _bfd_elf_create_dynamic_sections 4375 #define bfd_elf32_bfd_final_link \ 4376 bfd_elf_gc_common_final_link 4377 #define elf_backend_hide_symbol elf_cris_hide_symbol 4378 #define elf_backend_reloc_type_class elf_cris_reloc_type_class 4379 4380 #define elf_backend_want_got_plt 1 4381 #define elf_backend_plt_readonly 1 4382 #define elf_backend_want_plt_sym 0 4383 #define elf_backend_got_header_size 12 4384 #define elf_backend_got_elt_size elf_cris_got_elt_size 4385 4386 /* Later, we my want to optimize RELA entries into REL entries for dynamic 4387 linking and libraries (if it's a win of any significance). Until then, 4388 take the easy route. */ 4389 #define elf_backend_may_use_rel_p 0 4390 #define elf_backend_may_use_rela_p 1 4391 #define elf_backend_rela_normal 1 4392 4393 #include "elf32-target.h" 4394 4395 #undef TARGET_LITTLE_SYM 4396 #undef TARGET_LITTLE_NAME 4397 #undef elf_symbol_leading_char 4398 4399 #define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec 4400 #define TARGET_LITTLE_NAME "elf32-us-cris" 4401 #define elf_symbol_leading_char '_' 4402 #undef elf32_bed 4403 #define elf32_bed elf32_us_cris_bed 4404 4405 #include "elf32-target.h" 4406