elf32-cris.c revision 1.1.1.2
1 /* CRIS-specific support for 32-bit ELF. 2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 3 2010 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 /* Forward declarations. */ 33 static reloc_howto_type * cris_reloc_type_lookup 34 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); 35 36 static void cris_info_to_howto_rela 37 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); 38 39 static bfd_reloc_status_type cris_elf_pcrel_reloc 40 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); 41 42 static bfd_boolean cris_elf_grok_prstatus 43 PARAMS ((bfd *abfd, Elf_Internal_Note *note)); 44 45 static bfd_boolean cris_elf_grok_psinfo 46 PARAMS ((bfd *abfd, Elf_Internal_Note *note)); 47 48 static bfd_boolean cris_elf_relocate_section 49 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, 50 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); 51 52 static bfd_reloc_status_type cris_final_link_relocate 53 PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *, 54 Elf_Internal_Rela *, bfd_vma)); 55 56 static bfd_boolean cris_elf_object_p PARAMS ((bfd *)); 57 58 static void cris_elf_final_write_processing PARAMS ((bfd *, bfd_boolean)); 59 60 static bfd_boolean cris_elf_set_mach_from_flags 61 PARAMS ((bfd *, unsigned long int)); 62 63 static bfd_boolean cris_elf_print_private_bfd_data PARAMS ((bfd *, PTR)); 64 65 static bfd_boolean cris_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *)); 66 static bfd_boolean cris_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *)); 67 68 struct elf_cris_link_hash_entry; 69 static bfd_boolean elf_cris_discard_excess_dso_dynamics 70 PARAMS ((struct elf_cris_link_hash_entry *, PTR)); 71 static bfd_boolean elf_cris_discard_excess_program_dynamics 72 PARAMS ((struct elf_cris_link_hash_entry *, PTR)); 73 static bfd_boolean elf_cris_adjust_gotplt_to_got 74 PARAMS ((struct elf_cris_link_hash_entry *, PTR)); 75 static bfd_boolean elf_cris_try_fold_plt_to_got 76 PARAMS ((struct elf_cris_link_hash_entry *, PTR)); 77 static struct bfd_hash_entry *elf_cris_link_hash_newfunc 78 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); 79 static struct bfd_link_hash_table *elf_cris_link_hash_table_create 80 PARAMS ((bfd *)); 81 static bfd_boolean elf_cris_adjust_dynamic_symbol 82 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); 83 static bfd_boolean cris_elf_check_relocs 84 PARAMS ((bfd *, struct bfd_link_info *, asection *, 85 const Elf_Internal_Rela *)); 86 87 static bfd_boolean elf_cris_size_dynamic_sections 88 PARAMS ((bfd *, struct bfd_link_info *)); 89 static bfd_boolean elf_cris_finish_dynamic_symbol 90 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, 91 Elf_Internal_Sym *)); 92 static bfd_boolean elf_cris_finish_dynamic_sections 93 PARAMS ((bfd *, struct bfd_link_info *)); 94 static void elf_cris_hide_symbol 95 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean)); 96 static enum elf_reloc_type_class elf_cris_reloc_type_class 97 PARAMS ((const Elf_Internal_Rela *)); 98 99 static reloc_howto_type cris_elf_howto_table [] = 100 { 101 /* This reloc does nothing. */ 102 HOWTO (R_CRIS_NONE, /* type */ 103 0, /* rightshift */ 104 2, /* size (0 = byte, 1 = short, 2 = long) */ 105 32, /* bitsize */ 106 FALSE, /* pc_relative */ 107 0, /* bitpos */ 108 complain_overflow_bitfield, /* complain_on_overflow */ 109 bfd_elf_generic_reloc, /* special_function */ 110 "R_CRIS_NONE", /* name */ 111 FALSE, /* partial_inplace */ 112 0, /* src_mask */ 113 0, /* dst_mask */ 114 FALSE), /* pcrel_offset */ 115 116 /* An 8 bit absolute relocation. */ 117 HOWTO (R_CRIS_8, /* type */ 118 0, /* rightshift */ 119 0, /* size (0 = byte, 1 = short, 2 = long) */ 120 8, /* bitsize */ 121 FALSE, /* pc_relative */ 122 0, /* bitpos */ 123 complain_overflow_bitfield, /* complain_on_overflow */ 124 bfd_elf_generic_reloc, /* special_function */ 125 "R_CRIS_8", /* name */ 126 FALSE, /* partial_inplace */ 127 0x0000, /* src_mask */ 128 0x00ff, /* dst_mask */ 129 FALSE), /* pcrel_offset */ 130 131 /* A 16 bit absolute relocation. */ 132 HOWTO (R_CRIS_16, /* type */ 133 0, /* rightshift */ 134 1, /* size (0 = byte, 1 = short, 2 = long) */ 135 16, /* bitsize */ 136 FALSE, /* pc_relative */ 137 0, /* bitpos */ 138 complain_overflow_bitfield, /* complain_on_overflow */ 139 bfd_elf_generic_reloc, /* special_function */ 140 "R_CRIS_16", /* name */ 141 FALSE, /* partial_inplace */ 142 0x00000000, /* src_mask */ 143 0x0000ffff, /* dst_mask */ 144 FALSE), /* pcrel_offset */ 145 146 /* A 32 bit absolute relocation. */ 147 HOWTO (R_CRIS_32, /* type */ 148 0, /* rightshift */ 149 2, /* size (0 = byte, 1 = short, 2 = long) */ 150 32, /* bitsize */ 151 FALSE, /* pc_relative */ 152 0, /* bitpos */ 153 /* We don't want overflow complaints for 64-bit vma builds 154 for e.g. sym+0x40000000 (or actually sym-0xc0000000 in 155 32-bit ELF) where sym=0xc0001234. 156 Don't do this for the PIC relocs, as we don't expect to 157 see them with large offsets. */ 158 complain_overflow_dont, /* complain_on_overflow */ 159 bfd_elf_generic_reloc, /* special_function */ 160 "R_CRIS_32", /* name */ 161 FALSE, /* partial_inplace */ 162 0x00000000, /* src_mask */ 163 0xffffffff, /* dst_mask */ 164 FALSE), /* pcrel_offset */ 165 166 /* An 8 bit PC-relative relocation. */ 167 HOWTO (R_CRIS_8_PCREL, /* type */ 168 0, /* rightshift */ 169 0, /* size (0 = byte, 1 = short, 2 = long) */ 170 8, /* bitsize */ 171 TRUE, /* pc_relative */ 172 0, /* bitpos */ 173 complain_overflow_bitfield, /* complain_on_overflow */ 174 cris_elf_pcrel_reloc, /* special_function */ 175 "R_CRIS_8_PCREL", /* name */ 176 FALSE, /* partial_inplace */ 177 0x0000, /* src_mask */ 178 0x00ff, /* dst_mask */ 179 TRUE), /* pcrel_offset */ 180 181 /* A 16 bit PC-relative relocation. */ 182 HOWTO (R_CRIS_16_PCREL, /* type */ 183 0, /* rightshift */ 184 1, /* size (0 = byte, 1 = short, 2 = long) */ 185 16, /* bitsize */ 186 TRUE, /* pc_relative */ 187 0, /* bitpos */ 188 complain_overflow_bitfield, /* complain_on_overflow */ 189 cris_elf_pcrel_reloc, /* special_function */ 190 "R_CRIS_16_PCREL", /* name */ 191 FALSE, /* partial_inplace */ 192 0x00000000, /* src_mask */ 193 0x0000ffff, /* dst_mask */ 194 TRUE), /* pcrel_offset */ 195 196 /* A 32 bit PC-relative relocation. */ 197 HOWTO (R_CRIS_32_PCREL, /* type */ 198 0, /* rightshift */ 199 2, /* size (0 = byte, 1 = short, 2 = long) */ 200 32, /* bitsize */ 201 TRUE, /* pc_relative */ 202 0, /* bitpos */ 203 complain_overflow_bitfield, /* complain_on_overflow */ 204 cris_elf_pcrel_reloc, /* special_function */ 205 "R_CRIS_32_PCREL", /* name */ 206 FALSE, /* partial_inplace */ 207 0x00000000, /* src_mask */ 208 0xffffffff, /* dst_mask */ 209 TRUE), /* pcrel_offset */ 210 211 /* GNU extension to record C++ vtable hierarchy. */ 212 HOWTO (R_CRIS_GNU_VTINHERIT, /* type */ 213 0, /* rightshift */ 214 2, /* size (0 = byte, 1 = short, 2 = long) */ 215 0, /* bitsize */ 216 FALSE, /* pc_relative */ 217 0, /* bitpos */ 218 complain_overflow_dont, /* complain_on_overflow */ 219 NULL, /* special_function */ 220 "R_CRIS_GNU_VTINHERIT", /* name */ 221 FALSE, /* partial_inplace */ 222 0, /* src_mask */ 223 0, /* dst_mask */ 224 FALSE), /* pcrel_offset */ 225 226 /* GNU extension to record C++ vtable member usage. */ 227 HOWTO (R_CRIS_GNU_VTENTRY, /* type */ 228 0, /* rightshift */ 229 2, /* size (0 = byte, 1 = short, 2 = long) */ 230 0, /* bitsize */ 231 FALSE, /* pc_relative */ 232 0, /* bitpos */ 233 complain_overflow_dont, /* complain_on_overflow */ 234 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 235 "R_CRIS_GNU_VTENTRY", /* name */ 236 FALSE, /* partial_inplace */ 237 0, /* src_mask */ 238 0, /* dst_mask */ 239 FALSE), /* pcrel_offset */ 240 241 /* This is used only by the dynamic linker. The symbol should exist 242 both in the object being run and in some shared library. The 243 dynamic linker copies the data addressed by the symbol from the 244 shared library into the object, because the object being 245 run has to have the data at some particular address. */ 246 HOWTO (R_CRIS_COPY, /* type */ 247 0, /* rightshift */ 248 2, /* size (0 = byte, 1 = short, 2 = long) */ 249 32, /* bitsize */ 250 FALSE, /* pc_relative */ 251 0, /* bitpos */ 252 complain_overflow_bitfield, /* complain_on_overflow */ 253 bfd_elf_generic_reloc, /* special_function */ 254 "R_CRIS_COPY", /* name */ 255 FALSE, /* partial_inplace */ 256 0, /* src_mask */ 257 0, /* dst_mask */ 258 FALSE), /* pcrel_offset */ 259 260 /* Like R_CRIS_32, but used when setting global offset table entries. */ 261 HOWTO (R_CRIS_GLOB_DAT, /* type */ 262 0, /* rightshift */ 263 2, /* size (0 = byte, 1 = short, 2 = long) */ 264 32, /* bitsize */ 265 FALSE, /* pc_relative */ 266 0, /* bitpos */ 267 complain_overflow_bitfield, /* complain_on_overflow */ 268 bfd_elf_generic_reloc, /* special_function */ 269 "R_CRIS_GLOB_DAT", /* name */ 270 FALSE, /* partial_inplace */ 271 0, /* src_mask */ 272 0xffffffff, /* dst_mask */ 273 FALSE), /* pcrel_offset */ 274 275 /* Marks a procedure linkage table entry for a symbol. */ 276 HOWTO (R_CRIS_JUMP_SLOT, /* type */ 277 0, /* rightshift */ 278 2, /* size (0 = byte, 1 = short, 2 = long) */ 279 32, /* bitsize */ 280 FALSE, /* pc_relative */ 281 0, /* bitpos */ 282 complain_overflow_bitfield, /* complain_on_overflow */ 283 bfd_elf_generic_reloc, /* special_function */ 284 "R_CRIS_JUMP_SLOT", /* name */ 285 FALSE, /* partial_inplace */ 286 0, /* src_mask */ 287 0, /* dst_mask */ 288 FALSE), /* pcrel_offset */ 289 290 /* Used only by the dynamic linker. When the object is run, this 291 longword is set to the load address of the object, plus the 292 addend. */ 293 HOWTO (R_CRIS_RELATIVE, /* type */ 294 0, /* rightshift */ 295 2, /* size (0 = byte, 1 = short, 2 = long) */ 296 32, /* bitsize */ 297 FALSE, /* pc_relative */ 298 0, /* bitpos */ 299 complain_overflow_bitfield, /* complain_on_overflow */ 300 bfd_elf_generic_reloc, /* special_function */ 301 "R_CRIS_RELATIVE", /* name */ 302 FALSE, /* partial_inplace */ 303 0, /* src_mask */ 304 0xffffffff, /* dst_mask */ 305 FALSE), /* pcrel_offset */ 306 307 /* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */ 308 HOWTO (R_CRIS_16_GOT, /* type */ 309 0, /* rightshift */ 310 1, /* size (0 = byte, 1 = short, 2 = long) */ 311 16, /* 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_16_GOT", /* name */ 317 FALSE, /* partial_inplace */ 318 0, /* src_mask */ 319 0xffff, /* dst_mask */ 320 FALSE), /* pcrel_offset */ 321 322 HOWTO (R_CRIS_32_GOT, /* type */ 323 0, /* rightshift */ 324 2, /* size (0 = byte, 1 = short, 2 = long) */ 325 32, /* bitsize */ 326 FALSE, /* pc_relative */ 327 0, /* bitpos */ 328 complain_overflow_bitfield, /* complain_on_overflow */ 329 bfd_elf_generic_reloc, /* special_function */ 330 "R_CRIS_32_GOT", /* name */ 331 FALSE, /* partial_inplace */ 332 0, /* src_mask */ 333 0xffffffff, /* dst_mask */ 334 FALSE), /* pcrel_offset */ 335 336 /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of 337 the GOT table for the symbol. */ 338 HOWTO (R_CRIS_16_GOTPLT, /* type */ 339 0, /* rightshift */ 340 1, /* size (0 = byte, 1 = short, 2 = long) */ 341 16, /* bitsize */ 342 FALSE, /* pc_relative */ 343 0, /* bitpos */ 344 complain_overflow_bitfield, /* complain_on_overflow */ 345 bfd_elf_generic_reloc, /* special_function */ 346 "R_CRIS_16_GOTPLT", /* name */ 347 FALSE, /* partial_inplace */ 348 0, /* src_mask */ 349 0xffff, /* dst_mask */ 350 FALSE), /* pcrel_offset */ 351 352 HOWTO (R_CRIS_32_GOTPLT, /* type */ 353 0, /* rightshift */ 354 2, /* size (0 = byte, 1 = short, 2 = long) */ 355 32, /* bitsize */ 356 FALSE, /* pc_relative */ 357 0, /* bitpos */ 358 complain_overflow_bitfield, /* complain_on_overflow */ 359 bfd_elf_generic_reloc, /* special_function */ 360 "R_CRIS_32_GOTPLT", /* name */ 361 FALSE, /* partial_inplace */ 362 0, /* src_mask */ 363 0xffffffff, /* dst_mask */ 364 FALSE), /* pcrel_offset */ 365 366 /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should 367 be necessary. */ 368 HOWTO (R_CRIS_32_GOTREL, /* type */ 369 0, /* rightshift */ 370 2, /* size (0 = byte, 1 = short, 2 = long) */ 371 32, /* bitsize */ 372 FALSE, /* pc_relative */ 373 0, /* bitpos */ 374 complain_overflow_bitfield, /* complain_on_overflow */ 375 bfd_elf_generic_reloc, /* special_function */ 376 "R_CRIS_32_GOTREL", /* name */ 377 FALSE, /* partial_inplace */ 378 0, /* src_mask */ 379 0xffffffff, /* dst_mask */ 380 FALSE), /* pcrel_offset */ 381 382 /* A 32-bit offset from GOT to entry for this symbol in PLT and request 383 to create PLT entry for symbol. */ 384 HOWTO (R_CRIS_32_PLT_GOTREL, /* type */ 385 0, /* rightshift */ 386 2, /* size (0 = byte, 1 = short, 2 = long) */ 387 32, /* bitsize */ 388 FALSE, /* pc_relative */ 389 0, /* bitpos */ 390 complain_overflow_bitfield, /* complain_on_overflow */ 391 bfd_elf_generic_reloc, /* special_function */ 392 "R_CRIS_32_PLT_GOTREL", /* name */ 393 FALSE, /* partial_inplace */ 394 0, /* src_mask */ 395 0xffffffff, /* dst_mask */ 396 FALSE), /* pcrel_offset */ 397 398 /* A 32-bit offset from PC (location after the relocation) + addend to 399 entry for this symbol in PLT and request to create PLT entry for 400 symbol. */ 401 HOWTO (R_CRIS_32_PLT_PCREL, /* type */ 402 0, /* rightshift */ 403 2, /* size (0 = byte, 1 = short, 2 = long) */ 404 32, /* bitsize */ 405 TRUE, /* pc_relative */ 406 0, /* bitpos */ 407 complain_overflow_bitfield, /* complain_on_overflow */ 408 cris_elf_pcrel_reloc, /* special_function */ 409 "R_CRIS_32_PLT_PCREL", /* name */ 410 FALSE, /* partial_inplace */ 411 0, /* src_mask */ 412 0xffffffff, /* dst_mask */ 413 TRUE), /* pcrel_offset */ 414 415 /* We don't handle these in any special manner and cross-format 416 linking is not supported; just recognize them enough to pass them 417 around. FIXME: do the same for most PIC relocs and add sanity 418 tests to actually refuse gracefully to handle these and PIC 419 relocs for cross-format linking. */ 420 #define TLSHOWTO32(name) \ 421 HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \ 422 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE) 423 #define TLSHOWTO16X(name, X) \ 424 HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \ 425 bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE) 426 #define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned) 427 #define TLSHOWTO16S(name) TLSHOWTO16X(name, signed) 428 429 TLSHOWTO32 (R_CRIS_32_GOT_GD), 430 TLSHOWTO16 (R_CRIS_16_GOT_GD), 431 TLSHOWTO32 (R_CRIS_32_GD), 432 TLSHOWTO32 (R_CRIS_DTP), 433 TLSHOWTO32 (R_CRIS_32_DTPREL), 434 TLSHOWTO16S (R_CRIS_16_DTPREL), 435 TLSHOWTO32 (R_CRIS_32_GOT_TPREL), 436 TLSHOWTO16S (R_CRIS_16_GOT_TPREL), 437 TLSHOWTO32 (R_CRIS_32_TPREL), 438 TLSHOWTO16S (R_CRIS_16_TPREL), 439 TLSHOWTO32 (R_CRIS_DTPMOD), 440 TLSHOWTO32 (R_CRIS_32_IE) 441 }; 442 443 /* Map BFD reloc types to CRIS ELF reloc types. */ 445 446 struct cris_reloc_map 447 { 448 bfd_reloc_code_real_type bfd_reloc_val; 449 unsigned int cris_reloc_val; 450 }; 451 452 static const struct cris_reloc_map cris_reloc_map [] = 453 { 454 { BFD_RELOC_NONE, R_CRIS_NONE }, 455 { BFD_RELOC_8, R_CRIS_8 }, 456 { BFD_RELOC_16, R_CRIS_16 }, 457 { BFD_RELOC_32, R_CRIS_32 }, 458 { BFD_RELOC_8_PCREL, R_CRIS_8_PCREL }, 459 { BFD_RELOC_16_PCREL, R_CRIS_16_PCREL }, 460 { BFD_RELOC_32_PCREL, R_CRIS_32_PCREL }, 461 { BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT }, 462 { BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY }, 463 { BFD_RELOC_CRIS_COPY, R_CRIS_COPY }, 464 { BFD_RELOC_CRIS_GLOB_DAT, R_CRIS_GLOB_DAT }, 465 { BFD_RELOC_CRIS_JUMP_SLOT, R_CRIS_JUMP_SLOT }, 466 { BFD_RELOC_CRIS_RELATIVE, R_CRIS_RELATIVE }, 467 { BFD_RELOC_CRIS_16_GOT, R_CRIS_16_GOT }, 468 { BFD_RELOC_CRIS_32_GOT, R_CRIS_32_GOT }, 469 { BFD_RELOC_CRIS_16_GOTPLT, R_CRIS_16_GOTPLT }, 470 { BFD_RELOC_CRIS_32_GOTPLT, R_CRIS_32_GOTPLT }, 471 { BFD_RELOC_CRIS_32_GOTREL, R_CRIS_32_GOTREL }, 472 { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL }, 473 { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL }, 474 { BFD_RELOC_CRIS_32_GOT_GD, R_CRIS_32_GOT_GD }, 475 { BFD_RELOC_CRIS_16_GOT_GD, R_CRIS_16_GOT_GD }, 476 { BFD_RELOC_CRIS_32_GD, R_CRIS_32_GD }, 477 { BFD_RELOC_CRIS_DTP, R_CRIS_DTP }, 478 { BFD_RELOC_CRIS_32_DTPREL, R_CRIS_32_DTPREL }, 479 { BFD_RELOC_CRIS_16_DTPREL, R_CRIS_16_DTPREL }, 480 { BFD_RELOC_CRIS_32_GOT_TPREL, R_CRIS_32_GOT_TPREL }, 481 { BFD_RELOC_CRIS_16_GOT_TPREL, R_CRIS_16_GOT_TPREL }, 482 { BFD_RELOC_CRIS_32_TPREL, R_CRIS_32_TPREL }, 483 { BFD_RELOC_CRIS_16_TPREL, R_CRIS_16_TPREL }, 484 { BFD_RELOC_CRIS_DTPMOD, R_CRIS_DTPMOD }, 485 { BFD_RELOC_CRIS_32_IE, R_CRIS_32_IE } 486 }; 487 488 static reloc_howto_type * 489 cris_reloc_type_lookup (abfd, code) 490 bfd * abfd ATTRIBUTE_UNUSED; 491 bfd_reloc_code_real_type code; 492 { 493 unsigned int i; 494 495 for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++) 496 if (cris_reloc_map [i].bfd_reloc_val == code) 497 return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val]; 498 499 return NULL; 500 } 501 502 static reloc_howto_type * 503 cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) 504 { 505 unsigned int i; 506 507 for (i = 0; 508 i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]); 509 i++) 510 if (cris_elf_howto_table[i].name != NULL 511 && strcasecmp (cris_elf_howto_table[i].name, r_name) == 0) 512 return &cris_elf_howto_table[i]; 513 514 return NULL; 515 } 516 517 /* Set the howto pointer for an CRIS ELF reloc. */ 518 519 static void 520 cris_info_to_howto_rela (abfd, cache_ptr, dst) 521 bfd * abfd ATTRIBUTE_UNUSED; 522 arelent * cache_ptr; 523 Elf_Internal_Rela * dst; 524 { 525 enum elf_cris_reloc_type r_type; 526 527 r_type = ELF32_R_TYPE (dst->r_info); 528 BFD_ASSERT (r_type < (unsigned int) R_CRIS_max); 529 cache_ptr->howto = & cris_elf_howto_table [r_type]; 530 } 531 532 bfd_reloc_status_type 533 cris_elf_pcrel_reloc (abfd, reloc_entry, symbol, data, input_section, 534 output_bfd, error_message) 535 bfd *abfd ATTRIBUTE_UNUSED; 536 arelent *reloc_entry; 537 asymbol *symbol; 538 PTR data ATTRIBUTE_UNUSED; 539 asection *input_section; 540 bfd *output_bfd; 541 char **error_message ATTRIBUTE_UNUSED; 542 { 543 /* By default (using only bfd_elf_generic_reloc when linking to 544 non-ELF formats) PC-relative relocs are relative to the beginning 545 of the reloc. CRIS PC-relative relocs are relative to the position 546 *after* the reloc because that's what pre-CRISv32 PC points to 547 after reading an insn field with that reloc. (For CRISv32, PC is 548 actually relative to the start of the insn, but we keep the old 549 definition.) Still, we use as much generic machinery as we can. 550 551 Only adjust when doing a final link. */ 552 if (output_bfd == (bfd *) NULL) 553 reloc_entry->addend -= 1 << reloc_entry->howto->size; 554 555 return 556 bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 557 input_section, output_bfd, error_message); 558 } 559 560 /* Support for core dump NOTE sections. 562 The slightly unintuitive code layout is an attempt to keep at least 563 some similarities with other ports, hoping to simplify general 564 changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */ 565 566 static bfd_boolean 567 cris_elf_grok_prstatus (abfd, note) 568 bfd *abfd; 569 Elf_Internal_Note *note; 570 { 571 int offset; 572 size_t size; 573 574 if (bfd_get_mach (abfd) == bfd_mach_cris_v32) 575 switch (note->descsz) 576 { 577 default: 578 return FALSE; 579 580 case 202: /* Linux/CRISv32 */ 581 /* pr_cursig */ 582 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); 583 584 /* pr_pid */ 585 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 22); 586 587 /* pr_reg */ 588 offset = 70; 589 size = 128; 590 591 break; 592 } 593 else 594 switch (note->descsz) 595 { 596 default: 597 return FALSE; 598 599 case 214: /* Linux/CRIS */ 600 /* pr_cursig */ 601 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); 602 603 /* pr_pid */ 604 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 22); 605 606 /* pr_reg */ 607 offset = 70; 608 size = 140; 609 610 break; 611 } 612 613 /* Make a ".reg/999" section. */ 614 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 615 size, note->descpos + offset); 616 } 617 618 static bfd_boolean 619 cris_elf_grok_psinfo (abfd, note) 620 bfd *abfd; 621 Elf_Internal_Note *note; 622 { 623 if (bfd_get_mach (abfd) == bfd_mach_cris_v32) 624 switch (note->descsz) 625 { 626 default: 627 return FALSE; 628 629 case 124: /* Linux/CRISv32 elf_prpsinfo */ 630 elf_tdata (abfd)->core_program 631 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); 632 elf_tdata (abfd)->core_command 633 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); 634 } 635 else 636 switch (note->descsz) 637 { 638 default: 639 return FALSE; 640 641 case 124: /* Linux/CRIS elf_prpsinfo */ 642 elf_tdata (abfd)->core_program 643 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); 644 elf_tdata (abfd)->core_command 645 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); 646 } 647 648 /* Note that for some reason, a spurious space is tacked 649 onto the end of the args in some (at least one anyway) 650 implementations, so strip it off if it exists. */ 651 652 { 653 char *command = elf_tdata (abfd)->core_command; 654 int n = strlen (command); 655 656 if (0 < n && command[n - 1] == ' ') 657 command[n - 1] = '\0'; 658 } 659 660 return TRUE; 661 } 662 663 /* The name of the dynamic interpreter. This is put in the .interp 665 section. */ 666 667 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" 668 669 /* The size in bytes of an entry in the procedure linkage table. */ 670 671 #define PLT_ENTRY_SIZE 20 672 #define PLT_ENTRY_SIZE_V32 26 673 674 /* The first entry in an absolute procedure linkage table looks like this. */ 675 676 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] = 677 { 678 0xfc, 0xe1, 679 0x7e, 0x7e, /* push mof. */ 680 0x7f, 0x0d, /* (dip [pc+]) */ 681 0, 0, 0, 0, /* Replaced with address of .got + 4. */ 682 0x30, 0x7a, /* move [...],mof */ 683 0x7f, 0x0d, /* (dip [pc+]) */ 684 0, 0, 0, 0, /* Replaced with address of .got + 8. */ 685 0x30, 0x09 /* jump [...] */ 686 }; 687 688 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] = 689 { 690 0x84, 0xe2, /* subq 4,$sp */ 691 0x6f, 0xfe, /* move.d 0,$acr */ 692 0, 0, 0, 0, /* Replaced by address of .got + 4. */ 693 0x7e, 0x7a, /* move $mof,[$sp] */ 694 0x3f, 0x7a, /* move [$acr],$mof */ 695 0x04, 0xf2, /* addq 4,acr */ 696 0x6f, 0xfa, /* move.d [$acr],$acr */ 697 0xbf, 0x09, /* jump $acr */ 698 0xb0, 0x05, /* nop */ 699 0, 0 /* Pad out to 26 bytes. */ 700 }; 701 702 /* Subsequent entries in an absolute procedure linkage table look like 703 this. */ 704 705 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] = 706 { 707 0x7f, 0x0d, /* (dip [pc+]) */ 708 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */ 709 0x30, 0x09, /* jump [...] */ 710 0x3f, 0x7e, /* move [pc+],mof */ 711 0, 0, 0, 0, /* Replaced with offset into relocation table. */ 712 0x2f, 0xfe, /* add.d [pc+],pc */ 713 0xec, 0xff, 714 0xff, 0xff /* Replaced with offset to start of .plt. */ 715 }; 716 717 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] = 718 { 719 0x6f, 0xfe, /* move.d 0,$acr */ 720 0, 0, 0, 0, /* Replaced with address of this symbol in .got. */ 721 0x6f, 0xfa, /* move.d [$acr],$acr */ 722 0xbf, 0x09, /* jump $acr */ 723 0xb0, 0x05, /* nop */ 724 0x3f, 0x7e, /* move 0,mof */ 725 0, 0, 0, 0, /* Replaced with offset into relocation table. */ 726 0xbf, 0x0e, /* ba start_of_plt0_entry */ 727 0, 0, 0, 0, /* Replaced with offset to plt0 entry. */ 728 0xb0, 0x05 /* nop */ 729 }; 730 731 /* The first entry in a PIC procedure linkage table looks like this. */ 732 733 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] = 734 { 735 0xfc, 0xe1, 0x7e, 0x7e, /* push mof */ 736 0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */ 737 0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */ 738 0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */ 739 }; 740 741 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] = 742 { 743 0x84, 0xe2, /* subq 4,$sp */ 744 0x04, 0x01, /* addoq 4,$r0,$acr */ 745 0x7e, 0x7a, /* move $mof,[$sp] */ 746 0x3f, 0x7a, /* move [$acr],$mof */ 747 0x04, 0xf2, /* addq 4,$acr */ 748 0x6f, 0xfa, /* move.d [$acr],$acr */ 749 0xbf, 0x09, /* jump $acr */ 750 0xb0, 0x05, /* nop */ 751 0, 0, /* Pad out to 26 bytes. */ 752 0, 0, 0, 0, 753 0, 0, 0, 0 754 }; 755 756 /* Subsequent entries in a PIC procedure linkage table look like this. */ 757 758 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] = 759 { 760 0x6f, 0x0d, /* (bdap [pc+].d,r0) */ 761 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */ 762 0x30, 0x09, /* jump [...] */ 763 0x3f, 0x7e, /* move [pc+],mof */ 764 0, 0, 0, 0, /* Replaced with offset into relocation table. */ 765 0x2f, 0xfe, /* add.d [pc+],pc */ 766 0xec, 0xff, /* Replaced with offset to start of .plt. */ 767 0xff, 0xff 768 }; 769 770 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] = 771 { 772 0x6f, 0x0d, /* addo.d 0,$r0,$acr */ 773 0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */ 774 0x6f, 0xfa, /* move.d [$acr],$acr */ 775 0xbf, 0x09, /* jump $acr */ 776 0xb0, 0x05, /* nop */ 777 0x3f, 0x7e, /* move relocoffs,$mof */ 778 0, 0, 0, 0, /* Replaced with offset into relocation table. */ 779 0xbf, 0x0e, /* ba start_of_plt */ 780 0, 0, 0, 0, /* Replaced with offset to start of .plt. */ 781 0xb0, 0x05 /* nop */ 782 }; 783 784 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits 786 (and most other PIC/shlib stuff). Check that we don't drift away 787 without reason. 788 789 The CRIS linker, like the m68k and i386 linkers (and probably the rest 790 too) needs to keep track of the number of relocs that it decides to 791 copy in check_relocs for each symbol. This is so that it can discard 792 PC relative relocs if it doesn't need them when linking with 793 -Bsymbolic. We store the information in a field extending the regular 794 ELF linker hash table. */ 795 796 /* This structure keeps track of the number of PC relative relocs we have 797 copied for a given symbol. */ 798 799 struct elf_cris_pcrel_relocs_copied 800 { 801 /* Next section. */ 802 struct elf_cris_pcrel_relocs_copied *next; 803 804 /* A section in dynobj. */ 805 asection *section; 806 807 /* Number of relocs copied in this section. */ 808 bfd_size_type count; 809 810 /* Example of reloc being copied, for message. */ 811 enum elf_cris_reloc_type r_type; 812 }; 813 814 /* CRIS ELF linker hash entry. */ 815 816 struct elf_cris_link_hash_entry 817 { 818 struct elf_link_hash_entry root; 819 820 /* Number of PC relative relocs copied for this symbol. */ 821 struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied; 822 823 /* The GOTPLT references are CRIS-specific; the goal is to avoid having 824 both a general GOT and a PLT-specific GOT entry for the same symbol, 825 when it is referenced both as a function and as a function pointer. 826 827 Number of GOTPLT references for a function. */ 828 bfd_signed_vma gotplt_refcount; 829 830 /* Actual GOTPLT index for this symbol, if applicable, or zero if not 831 (zero is never used as an index). FIXME: We should be able to fold 832 this with gotplt_refcount in a union, like the got and plt unions in 833 elf_link_hash_entry. */ 834 bfd_size_type gotplt_offset; 835 836 /* The root.got.refcount is the sum of the regular reference counts 837 (this) and those members below. We have to keep a separate count 838 to track when we've found the first (or last) reference to a 839 regular got entry. The offset is in root.got.offset. */ 840 bfd_signed_vma reg_got_refcount; 841 842 /* Similar to the above, the number of reloc references to this 843 symbols that need a R_CRIS_32_TPREL slot. The offset is in 844 root.got.offset, because this and .dtp_refcount can't validly 845 happen when there's also a regular GOT entry; that's invalid 846 input for which an error is emitted. */ 847 bfd_signed_vma tprel_refcount; 848 849 /* Similar to the above, the number of reloc references to this 850 symbols that need a R_CRIS_DTP slot. The offset is in 851 root.got.offset; plus 4 if .tprel_refcount > 0. */ 852 bfd_signed_vma dtp_refcount; 853 }; 854 855 /* The local_got_refcounts and local_got_offsets are a multiple of 856 LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the 857 refcount for GOT itself, see code), with the summary / group offset 858 for local symbols located at offset N, reference counts for 859 ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP 860 relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N + 861 3*LSNUM. */ 862 863 #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info) 864 #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info) 865 #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info) 866 #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4) 867 868 /* CRIS ELF linker hash table. */ 869 870 struct elf_cris_link_hash_table 871 { 872 struct elf_link_hash_table root; 873 874 /* We can't use the PLT offset and calculate to get the GOTPLT offset, 875 since we try and avoid creating GOTPLT:s when there's already a GOT. 876 Instead, we keep and update the next available index here. */ 877 bfd_size_type next_gotplt_entry; 878 879 /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have 880 been seen for any input; if != 0, then the constant-offset 881 R_CRIS_DTPMOD is needed for this DSO/executable. This turns 882 negative at relocation, so that we don't need an extra flag for 883 when the reloc is output. */ 884 bfd_signed_vma dtpmod_refcount; 885 }; 886 887 /* Traverse a CRIS ELF linker hash table. */ 888 889 #define elf_cris_link_hash_traverse(table, func, info) \ 890 (elf_link_hash_traverse \ 891 (&(table)->root, \ 892 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ 893 (info))) 894 895 /* Get the CRIS ELF linker hash table from a link_info structure. */ 896 897 #define elf_cris_hash_table(p) \ 898 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 899 == CRIS_ELF_DATA ? ((struct elf_cris_link_hash_table *) ((p)->hash)) : NULL) 900 901 /* Get the CRIS ELF linker hash entry from a regular hash entry (the 902 "parent class"). The .root reference is just a simple type 903 check on the argument. */ 904 905 #define elf_cris_hash_entry(p) \ 906 ((struct elf_cris_link_hash_entry *) (&(p)->root)) 907 908 /* Create an entry in a CRIS ELF linker hash table. */ 909 910 static struct bfd_hash_entry * 911 elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry, 912 struct bfd_hash_table *table, 913 const char *string) 914 { 915 struct elf_cris_link_hash_entry *ret = 916 (struct elf_cris_link_hash_entry *) entry; 917 918 /* Allocate the structure if it has not already been allocated by a 919 subclass. */ 920 if (ret == (struct elf_cris_link_hash_entry *) NULL) 921 ret = ((struct elf_cris_link_hash_entry *) 922 bfd_hash_allocate (table, 923 sizeof (struct elf_cris_link_hash_entry))); 924 if (ret == (struct elf_cris_link_hash_entry *) NULL) 925 return (struct bfd_hash_entry *) ret; 926 927 /* Call the allocation method of the superclass. */ 928 ret = ((struct elf_cris_link_hash_entry *) 929 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 930 table, string)); 931 if (ret != (struct elf_cris_link_hash_entry *) NULL) 932 { 933 ret->pcrel_relocs_copied = NULL; 934 ret->gotplt_refcount = 0; 935 ret->gotplt_offset = 0; 936 ret->dtp_refcount = 0; 937 ret->tprel_refcount = 0; 938 ret->reg_got_refcount = 0; 939 } 940 941 return (struct bfd_hash_entry *) ret; 942 } 943 944 /* Create a CRIS ELF linker hash table. */ 945 946 static struct bfd_link_hash_table * 947 elf_cris_link_hash_table_create (bfd *abfd) 948 { 949 struct elf_cris_link_hash_table *ret; 950 bfd_size_type amt = sizeof (struct elf_cris_link_hash_table); 951 952 ret = ((struct elf_cris_link_hash_table *) bfd_malloc (amt)); 953 if (ret == (struct elf_cris_link_hash_table *) NULL) 954 return NULL; 955 956 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, 957 elf_cris_link_hash_newfunc, 958 sizeof (struct elf_cris_link_hash_entry), 959 CRIS_ELF_DATA)) 960 { 961 free (ret); 962 return NULL; 963 } 964 965 /* Initialize to skip over the first three entries in the gotplt; they 966 are used for run-time symbol evaluation. */ 967 ret->next_gotplt_entry = 12; 968 969 /* We haven't seen any R_CRIS_nn_GOT_TPREL initially. */ 970 ret->dtpmod_refcount = 0; 971 972 return &ret->root.root; 973 } 974 975 /* Perform a single relocation. By default we use the standard BFD 977 routines, with a few tweaks. */ 978 979 static bfd_reloc_status_type 980 cris_final_link_relocate (howto, input_bfd, input_section, contents, rel, 981 relocation) 982 reloc_howto_type * howto; 983 bfd * input_bfd; 984 asection * input_section; 985 bfd_byte * contents; 986 Elf_Internal_Rela * rel; 987 bfd_vma relocation; 988 { 989 bfd_reloc_status_type r; 990 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info); 991 992 /* PC-relative relocations are relative to the position *after* 993 the reloc. Note that for R_CRIS_8_PCREL the adjustment is 994 not a single byte, since PC must be 16-bit-aligned. */ 995 switch (r_type) 996 { 997 /* Check that the 16-bit GOT relocs are positive. */ 998 case R_CRIS_16_GOTPLT: 999 case R_CRIS_16_GOT: 1000 if ((bfd_signed_vma) relocation < 0) 1001 return bfd_reloc_overflow; 1002 break; 1003 1004 case R_CRIS_32_PLT_PCREL: 1005 case R_CRIS_32_PCREL: 1006 relocation -= 2; 1007 /* Fall through. */ 1008 case R_CRIS_8_PCREL: 1009 case R_CRIS_16_PCREL: 1010 relocation -= 2; 1011 break; 1012 1013 default: 1014 break; 1015 } 1016 1017 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 1018 contents, rel->r_offset, 1019 relocation, rel->r_addend); 1020 return r; 1021 } 1022 1023 1025 /* The number of errors left before we stop outputting reloc-specific 1026 explanatory messages. By coincidence, this works nicely together 1027 with the default number of messages you'll get from LD about 1028 "relocation truncated to fit" messages before you get an 1029 "additional relocation overflows omitted from the output". */ 1030 static int additional_relocation_error_msg_count = 10; 1031 1032 /* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was 1033 copied, for further comments. */ 1034 1035 static bfd_boolean 1036 cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, 1037 struct bfd_link_info *info, 1038 bfd *input_bfd, 1039 asection *input_section, 1040 bfd_byte *contents, 1041 Elf_Internal_Rela *relocs, 1042 Elf_Internal_Sym *local_syms, 1043 asection **local_sections) 1044 { 1045 struct elf_cris_link_hash_table * htab; 1046 bfd *dynobj; 1047 Elf_Internal_Shdr *symtab_hdr; 1048 struct elf_link_hash_entry **sym_hashes; 1049 bfd_vma *local_got_offsets; 1050 asection *sgot; 1051 asection *splt; 1052 asection *sreloc; 1053 Elf_Internal_Rela *rel; 1054 Elf_Internal_Rela *relend; 1055 asection *srelgot; 1056 1057 htab = elf_cris_hash_table (info); 1058 if (htab == NULL) 1059 return FALSE; 1060 1061 dynobj = elf_hash_table (info)->dynobj; 1062 local_got_offsets = elf_local_got_offsets (input_bfd); 1063 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; 1064 sym_hashes = elf_sym_hashes (input_bfd); 1065 relend = relocs + input_section->reloc_count; 1066 1067 sgot = NULL; 1068 splt = NULL; 1069 sreloc = NULL; 1070 srelgot = NULL; 1071 1072 if (dynobj != NULL) 1073 { 1074 splt = bfd_get_section_by_name (dynobj, ".plt"); 1075 sgot = bfd_get_section_by_name (dynobj, ".got"); 1076 } 1077 1078 for (rel = relocs; rel < relend; rel ++) 1079 { 1080 reloc_howto_type *howto; 1081 unsigned long r_symndx; 1082 Elf_Internal_Sym *sym; 1083 asection *sec; 1084 struct elf_link_hash_entry *h; 1085 bfd_vma relocation; 1086 bfd_reloc_status_type r; 1087 const char *symname = NULL; 1088 enum elf_cris_reloc_type r_type; 1089 1090 r_type = ELF32_R_TYPE (rel->r_info); 1091 1092 if ( r_type == R_CRIS_GNU_VTINHERIT 1093 || r_type == R_CRIS_GNU_VTENTRY) 1094 continue; 1095 1096 r_symndx = ELF32_R_SYM (rel->r_info); 1097 howto = cris_elf_howto_table + r_type; 1098 h = NULL; 1099 sym = NULL; 1100 sec = NULL; 1101 1102 if (r_symndx < symtab_hdr->sh_info) 1103 { 1104 sym = local_syms + r_symndx; 1105 sec = local_sections [r_symndx]; 1106 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 1107 1108 symname = (bfd_elf_string_from_elf_section 1109 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 1110 if (symname == NULL) 1111 symname = bfd_section_name (input_bfd, sec); 1112 } 1113 else 1114 { 1115 bfd_boolean warned; 1116 bfd_boolean unresolved_reloc; 1117 1118 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 1119 r_symndx, symtab_hdr, sym_hashes, 1120 h, sec, relocation, 1121 unresolved_reloc, warned); 1122 1123 symname = h->root.root.string; 1124 1125 if (unresolved_reloc 1126 /* Perhaps we should detect the cases that 1127 sec->output_section is expected to be NULL like i386 and 1128 m68k, but apparently (and according to elfxx-ia64.c) all 1129 valid cases are where the symbol is defined in a shared 1130 object which we link dynamically against. This includes 1131 PLT relocs for which we've created a PLT entry and other 1132 relocs for which we're prepared to create dynamic 1133 relocations. 1134 1135 For now, new situations cause us to just err when 1136 sec->output_offset is NULL but the object with the symbol 1137 is *not* dynamically linked against. Thus this will 1138 automatically remind us so we can see if there are other 1139 valid cases we need to revisit. */ 1140 && (sec->owner->flags & DYNAMIC) != 0) 1141 relocation = 0; 1142 1143 else if (h->root.type == bfd_link_hash_defined 1144 || h->root.type == bfd_link_hash_defweak) 1145 { 1146 /* Here follow the cases where the relocation value must 1147 be zero (or when further handling is simplified when 1148 zero). I can't claim to understand the various 1149 conditions and they weren't described in the files 1150 where I copied them from (elf32-m68k.c and 1151 elf32-i386.c), but let's mention examples of where 1152 they happen. FIXME: Perhaps define and use a 1153 dynamic_symbol_p function like ia64. 1154 1155 - When creating a shared library, we can have an 1156 ordinary relocation for a symbol defined in a shared 1157 library (perhaps the one we create). We then make 1158 the relocation value zero, as the value seen now will 1159 be added into the relocation addend in this shared 1160 library, but must be handled only at dynamic-link 1161 time. FIXME: Not sure this example covers the 1162 h->elf_link_hash_flags test, though it's there in 1163 other targets. */ 1164 if (info->shared 1165 && ((! info->symbolic && h->dynindx != -1) 1166 || !h->def_regular) 1167 && (input_section->flags & SEC_ALLOC) != 0 1168 && (r_type == R_CRIS_8 1169 || r_type == R_CRIS_16 1170 || r_type == R_CRIS_32 1171 || r_type == R_CRIS_8_PCREL 1172 || r_type == R_CRIS_16_PCREL 1173 || r_type == R_CRIS_32_PCREL)) 1174 relocation = 0; 1175 else if (!info->relocatable && unresolved_reloc) 1176 { 1177 _bfd_error_handler 1178 (_("%B, section %A: unresolvable relocation %s against symbol `%s'"), 1179 input_bfd, 1180 input_section, 1181 cris_elf_howto_table[r_type].name, 1182 symname); 1183 bfd_set_error (bfd_error_bad_value); 1184 return FALSE; 1185 } 1186 } 1187 } 1188 1189 if (sec != NULL && elf_discarded_section (sec)) 1190 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 1191 rel, relend, howto, contents); 1192 1193 if (info->relocatable) 1194 continue; 1195 1196 switch (r_type) 1197 { 1198 case R_CRIS_16_GOTPLT: 1199 case R_CRIS_32_GOTPLT: 1200 /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT, 1201 but we require a PLT, and the PLT handling will take care of 1202 filling in the PLT-specific GOT entry. For the GOT offset, 1203 calculate it as we do when filling it in for the .got.plt 1204 section. If we don't have a PLT, punt to GOT handling. */ 1205 if (h != NULL 1206 && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0) 1207 { 1208 asection *sgotplt 1209 = bfd_get_section_by_name (dynobj, ".got.plt"); 1210 bfd_vma got_offset; 1211 1212 BFD_ASSERT (h->dynindx != -1); 1213 BFD_ASSERT (sgotplt != NULL); 1214 1215 got_offset 1216 = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset; 1217 1218 relocation = got_offset; 1219 break; 1220 } 1221 1222 /* We didn't make a PLT entry for this symbol. Maybe everything is 1223 folded into the GOT. Other than folding, this happens when 1224 statically linking PIC code, or when using -Bsymbolic. Check 1225 that we instead have a GOT entry as done for us by 1226 elf_cris_adjust_dynamic_symbol, and drop through into the 1227 ordinary GOT cases. This must not happen for the 1228 executable, because any reference it does to a function 1229 that is satisfied by a DSO must generate a PLT. We assume 1230 these call-specific relocs don't address non-functions. */ 1231 if (h != NULL 1232 && (h->got.offset == (bfd_vma) -1 1233 || (!info->shared 1234 && !(h->def_regular 1235 || (!h->def_dynamic 1236 && h->root.type == bfd_link_hash_undefweak))))) 1237 { 1238 (*_bfd_error_handler) 1239 ((h->got.offset == (bfd_vma) -1) 1240 ? _("%B, section %A: No PLT nor GOT for relocation %s" 1241 " against symbol `%s'") 1242 : _("%B, section %A: No PLT for relocation %s" 1243 " against symbol `%s'"), 1244 input_bfd, 1245 input_section, 1246 cris_elf_howto_table[r_type].name, 1247 (symname != NULL && symname[0] != '\0' 1248 ? symname : _("[whose name is lost]"))); 1249 1250 /* FIXME: Perhaps blaming input is not the right thing to 1251 do; this is probably an internal error. But it is true 1252 that we didn't like that particular input. */ 1253 bfd_set_error (bfd_error_bad_value); 1254 return FALSE; 1255 } 1256 /* Fall through. */ 1257 1258 /* The size of the actual relocation is not used here; we only 1259 fill in the GOT table here. */ 1260 case R_CRIS_16_GOT: 1261 case R_CRIS_32_GOT: 1262 { 1263 bfd_vma off; 1264 1265 /* Note that despite using RELA relocations, the .got contents 1266 is always filled in with the link-relative relocation 1267 value; the addend. */ 1268 1269 if (h != NULL) 1270 { 1271 off = h->got.offset; 1272 BFD_ASSERT (off != (bfd_vma) -1); 1273 1274 if (!elf_hash_table (info)->dynamic_sections_created 1275 || (! info->shared 1276 && (h->def_regular 1277 || h->type == STT_FUNC 1278 || h->needs_plt)) 1279 || (info->shared 1280 && (info->symbolic || h->dynindx == -1) 1281 && h->def_regular)) 1282 { 1283 /* This wasn't checked above for ! info->shared, but 1284 must hold there if we get here; the symbol must 1285 be defined in the regular program or be undefweak 1286 or be a function or otherwise need a PLT. */ 1287 BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created 1288 || info->shared 1289 || h->def_regular 1290 || h->type == STT_FUNC 1291 || h->needs_plt 1292 || h->root.type == bfd_link_hash_undefweak); 1293 1294 /* This is actually a static link, or it is a 1295 -Bsymbolic link and the symbol is defined locally, 1296 or is undefweak, or the symbol was forced to be 1297 local because of a version file, or we're not 1298 creating a dynamic object. We must initialize this 1299 entry in the global offset table. Since the offset 1300 must always be a multiple of 4, we use the least 1301 significant bit to record whether we have 1302 initialized it already. 1303 1304 If this GOT entry should be runtime-initialized, we 1305 will create a .rela.got relocation entry to 1306 initialize the value. This is done in the 1307 finish_dynamic_symbol routine. */ 1308 if ((off & 1) != 0) 1309 off &= ~1; 1310 else 1311 { 1312 bfd_put_32 (output_bfd, relocation, 1313 sgot->contents + off); 1314 h->got.offset |= 1; 1315 } 1316 } 1317 } 1318 else 1319 { 1320 BFD_ASSERT (local_got_offsets != NULL 1321 && local_got_offsets[r_symndx] != (bfd_vma) -1); 1322 1323 off = local_got_offsets[r_symndx]; 1324 1325 /* The offset must always be a multiple of 4. We use 1326 the least significant bit to record whether we have 1327 already generated the necessary reloc. */ 1328 if ((off & 1) != 0) 1329 off &= ~1; 1330 else 1331 { 1332 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 1333 1334 if (info->shared) 1335 { 1336 Elf_Internal_Rela outrel; 1337 bfd_byte *loc; 1338 1339 if (srelgot == NULL) 1340 srelgot 1341 = bfd_get_section_by_name (dynobj, ".rela.got"); 1342 BFD_ASSERT (srelgot != NULL); 1343 1344 outrel.r_offset = (sgot->output_section->vma 1345 + sgot->output_offset 1346 + off); 1347 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE); 1348 outrel.r_addend = relocation; 1349 loc = srelgot->contents; 1350 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 1351 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1352 } 1353 1354 local_got_offsets[r_symndx] |= 1; 1355 } 1356 } 1357 1358 relocation = sgot->output_offset + off; 1359 if (rel->r_addend != 0) 1360 { 1361 /* We can't do anything for a relocation which is against 1362 a symbol *plus offset*. GOT holds relocations for 1363 symbols. Make this an error; the compiler isn't 1364 allowed to pass us these kinds of things. */ 1365 if (h == NULL) 1366 (*_bfd_error_handler) 1367 (_("%B, section %A: relocation %s with non-zero addend %d" 1368 " against local symbol"), 1369 input_bfd, 1370 input_section, 1371 cris_elf_howto_table[r_type].name, 1372 rel->r_addend); 1373 else 1374 (*_bfd_error_handler) 1375 (_("%B, section %A: relocation %s with non-zero addend %d" 1376 " against symbol `%s'"), 1377 input_bfd, 1378 input_section, 1379 cris_elf_howto_table[r_type].name, 1380 rel->r_addend, 1381 symname[0] != '\0' ? symname : _("[whose name is lost]")); 1382 1383 bfd_set_error (bfd_error_bad_value); 1384 return FALSE; 1385 } 1386 } 1387 break; 1388 1389 case R_CRIS_32_GOTREL: 1390 /* This relocation must only be performed against local symbols. 1391 It's also ok when we link a program and the symbol is either 1392 defined in an ordinary (non-DSO) object or is undefined weak. */ 1393 if (h != NULL 1394 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1395 && !(!info->shared 1396 && (h->def_regular 1397 || (!h->def_dynamic 1398 && h->root.type == bfd_link_hash_undefweak)))) 1399 { 1400 (*_bfd_error_handler) 1401 (_("%B, section %A: relocation %s is" 1402 " not allowed for global symbol: `%s'"), 1403 input_bfd, 1404 input_section, 1405 cris_elf_howto_table[r_type].name, 1406 symname); 1407 bfd_set_error (bfd_error_bad_value); 1408 return FALSE; 1409 } 1410 1411 /* This can happen if we get a link error with the input ELF 1412 variant mismatching the output variant. Emit an error so 1413 it's noticed if it happens elsewhere. */ 1414 if (sgot == NULL) 1415 { 1416 (*_bfd_error_handler) 1417 (_("%B, section %A: relocation %s with no GOT created"), 1418 input_bfd, 1419 input_section, 1420 cris_elf_howto_table[r_type].name); 1421 bfd_set_error (bfd_error_bad_value); 1422 return FALSE; 1423 } 1424 1425 /* This relocation is like a PC-relative one, except the 1426 reference point is the location of GOT. Note that 1427 sgot->output_offset is not involved in this calculation. We 1428 always want the start of entire .got section, not the 1429 position after the reserved header. */ 1430 relocation -= sgot->output_section->vma; 1431 break; 1432 1433 case R_CRIS_32_PLT_PCREL: 1434 /* Relocation is to the entry for this symbol in the 1435 procedure linkage table. */ 1436 1437 /* Resolve a PLT_PCREL reloc against a local symbol directly, 1438 without using the procedure linkage table. */ 1439 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 1440 break; 1441 1442 if (h->plt.offset == (bfd_vma) -1 1443 || splt == NULL) 1444 { 1445 /* We didn't make a PLT entry for this symbol. This 1446 happens when statically linking PIC code, or when 1447 using -Bsymbolic. */ 1448 break; 1449 } 1450 1451 relocation = (splt->output_section->vma 1452 + splt->output_offset 1453 + h->plt.offset); 1454 break; 1455 1456 case R_CRIS_32_PLT_GOTREL: 1457 /* Like R_CRIS_32_PLT_PCREL, but the reference point is the 1458 start of the .got section. See also comment at 1459 R_CRIS_32_GOT. */ 1460 relocation -= sgot->output_section->vma; 1461 1462 /* Resolve a PLT_GOTREL reloc against a local symbol directly, 1463 without using the procedure linkage table. */ 1464 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 1465 break; 1466 1467 if (h->plt.offset == (bfd_vma) -1 1468 || splt == NULL) 1469 { 1470 /* We didn't make a PLT entry for this symbol. This 1471 happens when statically linking PIC code, or when 1472 using -Bsymbolic. */ 1473 break; 1474 } 1475 1476 relocation = (splt->output_section->vma 1477 + splt->output_offset 1478 + h->plt.offset 1479 - sgot->output_section->vma); 1480 break; 1481 1482 case R_CRIS_8_PCREL: 1483 case R_CRIS_16_PCREL: 1484 case R_CRIS_32_PCREL: 1485 /* If the symbol was local, we need no shlib-specific handling. */ 1486 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 1487 || h->dynindx == -1) 1488 break; 1489 1490 /* Fall through. */ 1491 case R_CRIS_8: 1492 case R_CRIS_16: 1493 case R_CRIS_32: 1494 if (info->shared 1495 && r_symndx != STN_UNDEF 1496 && (input_section->flags & SEC_ALLOC) != 0 1497 && ((r_type != R_CRIS_8_PCREL 1498 && r_type != R_CRIS_16_PCREL 1499 && r_type != R_CRIS_32_PCREL) 1500 || (!info->symbolic 1501 || (h != NULL && !h->def_regular)))) 1502 { 1503 Elf_Internal_Rela outrel; 1504 bfd_byte *loc; 1505 bfd_boolean skip, relocate; 1506 1507 /* When generating a shared object, these relocations 1508 are copied into the output file to be resolved at run 1509 time. */ 1510 1511 if (sreloc == NULL) 1512 { 1513 sreloc = _bfd_elf_get_dynamic_reloc_section 1514 (dynobj, input_section, /*rela?*/ TRUE); 1515 /* The section should have been created in cris_elf_check_relocs, 1516 but that function will not be called for objects which fail in 1517 cris_elf_merge_private_bfd_data. */ 1518 if (sreloc == NULL) 1519 { 1520 bfd_set_error (bfd_error_bad_value); 1521 return FALSE; 1522 } 1523 } 1524 1525 skip = FALSE; 1526 relocate = FALSE; 1527 1528 outrel.r_offset = 1529 _bfd_elf_section_offset (output_bfd, info, input_section, 1530 rel->r_offset); 1531 if (outrel.r_offset == (bfd_vma) -1) 1532 skip = TRUE; 1533 else if (outrel.r_offset == (bfd_vma) -2 1534 /* For now, undefined weak symbols with non-default 1535 visibility (yielding 0), like exception info for 1536 discarded sections, will get a R_CRIS_NONE 1537 relocation rather than no relocation, because we 1538 notice too late that the symbol doesn't need a 1539 relocation. */ 1540 || (h != NULL 1541 && h->root.type == bfd_link_hash_undefweak 1542 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)) 1543 skip = TRUE, relocate = TRUE; 1544 outrel.r_offset += (input_section->output_section->vma 1545 + input_section->output_offset); 1546 1547 if (skip) 1548 memset (&outrel, 0, sizeof outrel); 1549 /* h->dynindx may be -1 if the symbol was marked to 1550 become local. */ 1551 else if (h != NULL 1552 && ((! info->symbolic && h->dynindx != -1) 1553 || !h->def_regular)) 1554 { 1555 BFD_ASSERT (h->dynindx != -1); 1556 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 1557 outrel.r_addend = relocation + rel->r_addend; 1558 } 1559 else 1560 { 1561 outrel.r_addend = relocation + rel->r_addend; 1562 1563 if (r_type == R_CRIS_32) 1564 { 1565 relocate = TRUE; 1566 outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE); 1567 } 1568 else 1569 { 1570 long indx; 1571 1572 if (bfd_is_abs_section (sec)) 1573 indx = 0; 1574 else if (sec == NULL || sec->owner == NULL) 1575 { 1576 bfd_set_error (bfd_error_bad_value); 1577 return FALSE; 1578 } 1579 else 1580 { 1581 asection *osec; 1582 1583 /* We are turning this relocation into one 1584 against a section symbol. It would be 1585 proper to subtract the symbol's value, 1586 osec->vma, from the emitted reloc addend, 1587 but ld.so expects buggy relocs. */ 1588 osec = sec->output_section; 1589 indx = elf_section_data (osec)->dynindx; 1590 if (indx == 0) 1591 { 1592 osec = htab->root.text_index_section; 1593 indx = elf_section_data (osec)->dynindx; 1594 } 1595 BFD_ASSERT (indx != 0); 1596 } 1597 1598 outrel.r_info = ELF32_R_INFO (indx, r_type); 1599 } 1600 } 1601 1602 loc = sreloc->contents; 1603 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 1604 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1605 1606 /* This reloc will be computed at runtime, so there's no 1607 need to do anything now, except for R_CRIS_32 relocations 1608 that have been turned into R_CRIS_RELATIVE. */ 1609 if (!relocate) 1610 continue; 1611 } 1612 1613 break; 1614 1615 case R_CRIS_16_DTPREL: 1616 case R_CRIS_32_DTPREL: 1617 /* This relocation must only be performed against local 1618 symbols, or to sections that are not loadable. It's also 1619 ok when we link a program and the symbol is defined in an 1620 ordinary (non-DSO) object (if it's undefined there, we've 1621 already seen an error). */ 1622 if (h != NULL 1623 && (input_section->flags & SEC_ALLOC) != 0 1624 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1625 && (info->shared 1626 || (!h->def_regular 1627 && h->root.type != bfd_link_hash_undefined))) 1628 { 1629 (*_bfd_error_handler) 1630 ((h->root.type == bfd_link_hash_undefined) 1631 /* We shouldn't get here for GCC-emitted code. */ 1632 ? _("%B, section %A: relocation %s has an undefined" 1633 " reference to `%s', perhaps a declaration mixup?") 1634 : ("%B, section %A: relocation %s is" 1635 " not allowed for `%s', a global symbol with default" 1636 " visibility, perhaps a declaration mixup?"), 1637 input_bfd, 1638 input_section, 1639 cris_elf_howto_table[r_type].name, 1640 symname != NULL && symname[0] != '\0' 1641 ? symname : _("[whose name is lost]")); 1642 bfd_set_error (bfd_error_bad_value); 1643 return FALSE; 1644 } 1645 1646 BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0 1647 || htab->dtpmod_refcount != 0); 1648 1649 /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't 1650 already done so. Note that we do this in .got.plt, not 1651 in .got, as .got.plt contains the first part, still the 1652 reloc is against .got, because the linker script directs 1653 (is required to direct) them both into .got. */ 1654 if (htab->dtpmod_refcount > 0 1655 && (input_section->flags & SEC_ALLOC) != 0) 1656 { 1657 asection *sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); 1658 BFD_ASSERT (sgotplt != NULL); 1659 1660 if (info->shared) 1661 { 1662 Elf_Internal_Rela outrel; 1663 bfd_byte *loc; 1664 1665 if (srelgot == NULL) 1666 srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); 1667 BFD_ASSERT (srelgot != NULL); 1668 loc = srelgot->contents; 1669 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 1670 1671 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12); 1672 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16); 1673 outrel.r_offset = (sgotplt->output_section->vma 1674 + sgotplt->output_offset 1675 + 12); 1676 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD); 1677 outrel.r_addend = 0; 1678 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1679 } 1680 else 1681 { 1682 /* For an executable, the GOT entry contents is known. */ 1683 bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12); 1684 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16); 1685 } 1686 1687 /* Reverse the sign to mark that we've emitted the 1688 required GOT entry. */ 1689 htab->dtpmod_refcount = - htab->dtpmod_refcount; 1690 } 1691 1692 /* The relocation is the offset from the start of the module 1693 TLS block to the (local) symbol. */ 1694 relocation -= elf_hash_table (info)->tls_sec == NULL 1695 ? 0 : elf_hash_table (info)->tls_sec->vma; 1696 break; 1697 1698 case R_CRIS_32_GD: 1699 if (info->shared) 1700 { 1701 bfd_set_error (bfd_error_invalid_operation); 1702 1703 /* We've already informed in cris_elf_check_relocs that 1704 this is an error. */ 1705 return FALSE; 1706 } 1707 /* Fall through. */ 1708 1709 case R_CRIS_16_GOT_GD: 1710 case R_CRIS_32_GOT_GD: 1711 if (rel->r_addend != 0) 1712 { 1713 /* We can't do anything for a relocation which is against a 1714 symbol *plus offset*. The GOT holds relocations for 1715 symbols. Make this an error; the compiler isn't allowed 1716 to pass us these kinds of things. */ 1717 (*_bfd_error_handler) 1718 (_("%B, section %A: relocation %s with non-zero addend %d" 1719 " against symbol `%s'"), 1720 input_bfd, 1721 input_section, 1722 cris_elf_howto_table[r_type].name, 1723 rel->r_addend, 1724 symname[0] != '\0' ? symname : _("[whose name is lost]")); 1725 1726 bfd_set_error (bfd_error_bad_value); 1727 return FALSE; 1728 } 1729 1730 if (!info->shared 1731 && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h))) 1732 { 1733 /* Known contents of the GOT. */ 1734 bfd_vma off; 1735 1736 /* The symbol is defined in the program, so just write 1737 (1, known_tpoffset) into the GOT. */ 1738 relocation -= elf_hash_table (info)->tls_sec->vma; 1739 1740 if (h != NULL) 1741 { 1742 off = elf_cris_hash_entry (h)->tprel_refcount > 0 1743 ? h->got.offset + 4 : h->got.offset; 1744 } 1745 else 1746 { 1747 off = local_got_offsets[r_symndx]; 1748 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)]) 1749 off += 4; 1750 } 1751 1752 /* We use bit 1 of the offset as a flag for GOT entry with 1753 the R_CRIS_DTP reloc, setting it when we've emitted the 1754 GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL 1755 relocs. */ 1756 if ((off & 2) == 0) 1757 { 1758 off &= ~3; 1759 1760 if (h != NULL) 1761 h->got.offset |= 2; 1762 else 1763 local_got_offsets[r_symndx] |= 2; 1764 1765 bfd_put_32 (output_bfd, 1, sgot->contents + off); 1766 bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4); 1767 } 1768 else 1769 off &= ~3; 1770 1771 relocation = sgot->output_offset + off 1772 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0); 1773 } 1774 else 1775 { 1776 /* Not all parts of the GOT entry are known; emit a real 1777 relocation. */ 1778 bfd_vma off; 1779 1780 if (h != NULL) 1781 off = elf_cris_hash_entry (h)->tprel_refcount > 0 1782 ? h->got.offset + 4 : h->got.offset; 1783 else 1784 { 1785 off = local_got_offsets[r_symndx]; 1786 if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)]) 1787 off += 4; 1788 } 1789 1790 /* See above re bit 1 and bit 0 usage. */ 1791 if ((off & 2) == 0) 1792 { 1793 Elf_Internal_Rela outrel; 1794 bfd_byte *loc; 1795 1796 off &= ~3; 1797 1798 if (h != NULL) 1799 h->got.offset |= 2; 1800 else 1801 local_got_offsets[r_symndx] |= 2; 1802 1803 /* Clear the target contents of the GOT (just as a 1804 gesture; it's already cleared on allocation): this 1805 relocation is not like the other dynrelocs. */ 1806 bfd_put_32 (output_bfd, 0, sgot->contents + off); 1807 bfd_put_32 (output_bfd, 0, sgot->contents + off + 4); 1808 1809 if (srelgot == NULL) 1810 srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); 1811 BFD_ASSERT (srelgot != NULL); 1812 1813 if (h != NULL && h->dynindx != -1) 1814 { 1815 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP); 1816 relocation = 0; 1817 } 1818 else 1819 { 1820 outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP); 1821 1822 /* NULL if we had an error. */ 1823 relocation -= elf_hash_table (info)->tls_sec == NULL 1824 ? 0 : elf_hash_table (info)->tls_sec->vma; 1825 } 1826 1827 outrel.r_offset = (sgot->output_section->vma 1828 + sgot->output_offset 1829 + off); 1830 outrel.r_addend = relocation; 1831 loc = srelgot->contents; 1832 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 1833 1834 /* NULL if we had an error. */ 1835 if (srelgot->contents != NULL) 1836 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1837 } 1838 else 1839 off &= ~3; 1840 1841 relocation = sgot->output_offset + off 1842 + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0); 1843 } 1844 1845 /* The GOT-relative offset to the GOT entry is the 1846 relocation, or for R_CRIS_32_GD, the actual address of 1847 the GOT entry. */ 1848 break; 1849 1850 case R_CRIS_32_IE: 1851 if (info->shared) 1852 { 1853 bfd_set_error (bfd_error_invalid_operation); 1854 1855 /* We've already informed in cris_elf_check_relocs that 1856 this is an error. */ 1857 return FALSE; 1858 } 1859 /* Fall through. */ 1860 1861 case R_CRIS_32_GOT_TPREL: 1862 case R_CRIS_16_GOT_TPREL: 1863 if (rel->r_addend != 0) 1864 { 1865 /* We can't do anything for a relocation which is 1866 against a symbol *plus offset*. GOT holds 1867 relocations for symbols. Make this an error; the 1868 compiler isn't allowed to pass us these kinds of 1869 things. */ 1870 (*_bfd_error_handler) 1871 (_("%B, section %A: relocation %s with non-zero addend %d" 1872 " against symbol `%s'"), 1873 input_bfd, 1874 input_section, 1875 cris_elf_howto_table[r_type].name, 1876 rel->r_addend, 1877 symname[0] != '\0' ? symname : _("[whose name is lost]")); 1878 bfd_set_error (bfd_error_bad_value); 1879 return FALSE; 1880 } 1881 1882 if (!info->shared && (h == NULL || h->def_regular)) 1883 { 1884 /* Known contents of the GOT. */ 1885 bfd_vma off; 1886 1887 /* The symbol is defined in the program, so just write 1888 the -prog_tls_size+known_tpoffset into the GOT. */ 1889 relocation -= elf_hash_table (info)->tls_sec->vma; 1890 relocation -= elf_hash_table (info)->tls_size; 1891 1892 if (h != NULL) 1893 off = h->got.offset; 1894 else 1895 off = local_got_offsets[r_symndx]; 1896 1897 /* Bit 0 is used to mark whether we've emitted the required 1898 entry (and if needed R_CRIS_32_TPREL reloc). Bit 1 1899 is used similarly for R_CRIS_DTP, see above. */ 1900 if ((off & 1) == 0) 1901 { 1902 off &= ~3; 1903 1904 if (h != NULL) 1905 h->got.offset |= 1; 1906 else 1907 local_got_offsets[r_symndx] |= 1; 1908 1909 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 1910 } 1911 else 1912 off &= ~3; 1913 1914 relocation = sgot->output_offset + off 1915 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0); 1916 } 1917 else 1918 { 1919 /* Emit a real relocation. */ 1920 bfd_vma off; 1921 1922 if (h != NULL) 1923 off = h->got.offset; 1924 else 1925 off = local_got_offsets[r_symndx]; 1926 1927 /* See above re usage of bit 0 and 1. */ 1928 if ((off & 1) == 0) 1929 { 1930 Elf_Internal_Rela outrel; 1931 bfd_byte *loc; 1932 1933 off &= ~3; 1934 1935 if (h != NULL) 1936 h->got.offset |= 1; 1937 else 1938 local_got_offsets[r_symndx] |= 1; 1939 1940 if (srelgot == NULL) 1941 srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); 1942 BFD_ASSERT (srelgot != NULL); 1943 1944 if (h != NULL && h->dynindx != -1) 1945 { 1946 outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL); 1947 relocation = 0; 1948 } 1949 else 1950 { 1951 outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL); 1952 1953 /* NULL if we had an error. */ 1954 relocation -= elf_hash_table (info)->tls_sec == NULL 1955 ? 0 : elf_hash_table (info)->tls_sec->vma; 1956 } 1957 1958 /* Just "define" the initial contents in some 1959 semi-logical way. */ 1960 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 1961 1962 outrel.r_offset = (sgot->output_section->vma 1963 + sgot->output_offset 1964 + off); 1965 outrel.r_addend = relocation; 1966 loc = srelgot->contents; 1967 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); 1968 /* NULL if we had an error. */ 1969 if (srelgot->contents != NULL) 1970 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 1971 } 1972 else 1973 off &= ~3; 1974 1975 relocation = sgot->output_offset + off 1976 + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0); 1977 } 1978 1979 /* The GOT-relative offset to the GOT entry is the relocation, 1980 or for R_CRIS_32_GD, the actual address of the GOT entry. */ 1981 break; 1982 1983 case R_CRIS_16_TPREL: 1984 case R_CRIS_32_TPREL: 1985 /* This relocation must only be performed against symbols 1986 defined in an ordinary (non-DSO) object. */ 1987 if (info->shared) 1988 { 1989 bfd_set_error (bfd_error_invalid_operation); 1990 1991 /* We've already informed in cris_elf_check_relocs that 1992 this is an error. */ 1993 return FALSE; 1994 } 1995 1996 if (h != NULL 1997 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 1998 && !(h->def_regular || ELF_COMMON_DEF_P (h)) 1999 /* If it's undefined, then an error message has already 2000 been emitted. */ 2001 && h->root.type != bfd_link_hash_undefined) 2002 { 2003 (*_bfd_error_handler) 2004 (_("%B, section %A: relocation %s is" 2005 " not allowed for symbol: `%s'" 2006 " which is defined outside the program," 2007 " perhaps a declaration mixup?"), 2008 input_bfd, 2009 input_section, 2010 cris_elf_howto_table[r_type].name, 2011 symname); 2012 bfd_set_error (bfd_error_bad_value); 2013 return FALSE; 2014 } 2015 2016 /* NULL if we had an error. */ 2017 relocation -= elf_hash_table (info)->tls_sec == NULL 2018 ? 0 2019 : (elf_hash_table (info)->tls_sec->vma 2020 + elf_hash_table (info)->tls_size); 2021 2022 /* The TLS-relative offset is the relocation. */ 2023 break; 2024 2025 default: 2026 BFD_FAIL (); 2027 return FALSE; 2028 } 2029 2030 r = cris_final_link_relocate (howto, input_bfd, input_section, 2031 contents, rel, relocation); 2032 2033 if (r != bfd_reloc_ok) 2034 { 2035 const char * msg = (const char *) NULL; 2036 2037 switch (r) 2038 { 2039 case bfd_reloc_overflow: 2040 r = info->callbacks->reloc_overflow 2041 (info, (h ? &h->root : NULL), symname, howto->name, 2042 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 2043 if (additional_relocation_error_msg_count > 0) 2044 { 2045 additional_relocation_error_msg_count--; 2046 switch (r_type) 2047 { 2048 case R_CRIS_16_GOTPLT: 2049 case R_CRIS_16_GOT: 2050 2051 /* Not just TLS is involved here, so we make 2052 generation and message depend on -fPIC/-fpic 2053 only. */ 2054 case R_CRIS_16_GOT_TPREL: 2055 case R_CRIS_16_GOT_GD: 2056 (*_bfd_error_handler) 2057 (_("(too many global variables for -fpic:" 2058 " recompile with -fPIC)")); 2059 break; 2060 2061 case R_CRIS_16_TPREL: 2062 case R_CRIS_16_DTPREL: 2063 (*_bfd_error_handler) 2064 (_("(thread-local data too big for -fpic or" 2065 " -msmall-tls: recompile with -fPIC or" 2066 " -mno-small-tls)")); 2067 break; 2068 2069 /* No known cause for overflow for other relocs. */ 2070 default: 2071 break; 2072 } 2073 } 2074 break; 2075 2076 case bfd_reloc_undefined: 2077 r = info->callbacks->undefined_symbol 2078 (info, symname, input_bfd, input_section, rel->r_offset, 2079 TRUE); 2080 break; 2081 2082 case bfd_reloc_outofrange: 2083 msg = _("internal error: out of range error"); 2084 break; 2085 2086 case bfd_reloc_notsupported: 2087 msg = _("internal error: unsupported relocation error"); 2088 break; 2089 2090 case bfd_reloc_dangerous: 2091 msg = _("internal error: dangerous relocation"); 2092 break; 2093 2094 default: 2095 msg = _("internal error: unknown error"); 2096 break; 2097 } 2098 2099 if (msg) 2100 r = info->callbacks->warning 2101 (info, msg, symname, input_bfd, input_section, rel->r_offset); 2102 2103 if (! r) 2104 return FALSE; 2105 } 2106 } 2107 2108 return TRUE; 2109 } 2110 2111 /* Finish up dynamic symbol handling. We set the contents of various 2113 dynamic sections here. */ 2114 2115 static bfd_boolean 2116 elf_cris_finish_dynamic_symbol (bfd *output_bfd, 2117 struct bfd_link_info *info, 2118 struct elf_link_hash_entry *h, 2119 Elf_Internal_Sym *sym) 2120 { 2121 struct elf_cris_link_hash_table * htab; 2122 bfd *dynobj; 2123 2124 /* Where in the plt entry to put values. */ 2125 int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16; 2126 2127 /* What offset to add to the distance to the first PLT entry for the 2128 value at plt_off3. */ 2129 int plt_off3_value_bias = 4; 2130 2131 /* Where in the PLT entry the call-dynlink-stub is (happens to be same 2132 for PIC and non-PIC for v32 and pre-v32). */ 2133 int plt_stub_offset = 8; 2134 int plt_entry_size = PLT_ENTRY_SIZE; 2135 const bfd_byte *plt_entry = elf_cris_plt_entry; 2136 const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry; 2137 2138 htab = elf_cris_hash_table (info); 2139 if (htab == NULL) 2140 return FALSE; 2141 2142 /* Adjust the various PLT entry offsets. */ 2143 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32) 2144 { 2145 plt_off2 = 14; 2146 plt_off3 = 20; 2147 plt_off3_value_bias = -2; 2148 plt_stub_offset = 12; 2149 plt_entry_size = PLT_ENTRY_SIZE_V32; 2150 plt_entry = elf_cris_plt_entry_v32; 2151 plt_pic_entry = elf_cris_pic_plt_entry_v32; 2152 } 2153 2154 dynobj = elf_hash_table (info)->dynobj; 2155 2156 if (h->plt.offset != (bfd_vma) -1) 2157 { 2158 asection *splt; 2159 asection *sgotplt; 2160 asection *srela; 2161 bfd_vma got_base; 2162 2163 bfd_vma gotplt_offset 2164 = elf_cris_hash_entry (h)->gotplt_offset; 2165 Elf_Internal_Rela rela; 2166 bfd_byte *loc; 2167 bfd_boolean has_gotplt = gotplt_offset != 0; 2168 2169 /* Get the index in the .rela.plt relocations for the .got.plt 2170 entry that corresponds to this symbol. 2171 We have to count backwards here, and the result is only valid 2172 as an index into .rela.plt. We also have to undo the effect 2173 of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into 2174 .got.plt) for which gotplt_offset is adjusted, because while 2175 that entry goes into .got.plt, its relocation goes into 2176 .rela.got, not .rela.plt. (It's not PLT-specific; not to be 2177 processed as part of the runtime lazy .rela.plt relocation). 2178 FIXME: There be literal constants here... */ 2179 bfd_vma rela_plt_index 2180 = (htab->dtpmod_refcount != 0 2181 ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3); 2182 2183 /* Get the offset into the .got table of the entry that corresponds 2184 to this function. Note that we embed knowledge that "incoming" 2185 .got goes after .got.plt in the output without padding (pointer 2186 aligned). However, that knowledge is present in several other 2187 places too. */ 2188 bfd_vma got_offset 2189 = (has_gotplt 2190 ? gotplt_offset 2191 : h->got.offset + htab->next_gotplt_entry); 2192 2193 /* This symbol has an entry in the procedure linkage table. Set it 2194 up. */ 2195 2196 BFD_ASSERT (h->dynindx != -1); 2197 2198 splt = bfd_get_section_by_name (dynobj, ".plt"); 2199 sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); 2200 srela = bfd_get_section_by_name (dynobj, ".rela.plt"); 2201 BFD_ASSERT (splt != NULL && sgotplt != NULL 2202 && (! has_gotplt || srela != NULL)); 2203 2204 got_base = sgotplt->output_section->vma + sgotplt->output_offset; 2205 2206 /* Fill in the entry in the procedure linkage table. */ 2207 if (! info->shared) 2208 { 2209 memcpy (splt->contents + h->plt.offset, plt_entry, 2210 plt_entry_size); 2211 2212 /* We need to enter the absolute address of the GOT entry here. */ 2213 bfd_put_32 (output_bfd, got_base + got_offset, 2214 splt->contents + h->plt.offset + plt_off1); 2215 } 2216 else 2217 { 2218 memcpy (splt->contents + h->plt.offset, plt_pic_entry, 2219 plt_entry_size); 2220 bfd_put_32 (output_bfd, got_offset, 2221 splt->contents + h->plt.offset + plt_off1); 2222 } 2223 2224 /* Fill in the plt entry and make a relocation, if this is a "real" 2225 PLT entry. */ 2226 if (has_gotplt) 2227 { 2228 /* Fill in the offset to the reloc table. */ 2229 bfd_put_32 (output_bfd, 2230 rela_plt_index * sizeof (Elf32_External_Rela), 2231 splt->contents + h->plt.offset + plt_off2); 2232 2233 /* Fill in the offset to the first PLT entry, where to "jump". */ 2234 bfd_put_32 (output_bfd, 2235 - (h->plt.offset + plt_off3 + plt_off3_value_bias), 2236 splt->contents + h->plt.offset + plt_off3); 2237 2238 /* Fill in the entry in the global offset table with the address of 2239 the relocating stub. */ 2240 bfd_put_32 (output_bfd, 2241 (splt->output_section->vma 2242 + splt->output_offset 2243 + h->plt.offset 2244 + plt_stub_offset), 2245 sgotplt->contents + got_offset); 2246 2247 /* Fill in the entry in the .rela.plt section. */ 2248 rela.r_offset = (sgotplt->output_section->vma 2249 + sgotplt->output_offset 2250 + got_offset); 2251 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT); 2252 rela.r_addend = 0; 2253 loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela); 2254 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 2255 } 2256 2257 if (!h->def_regular) 2258 { 2259 /* Mark the symbol as undefined, rather than as defined in 2260 the .plt section. Leave the value alone. */ 2261 sym->st_shndx = SHN_UNDEF; 2262 2263 /* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't 2264 know whether resetting the value is significant; if it really 2265 is, rather than a quirk or bug in the sparc port, then I 2266 believe we'd see this elsewhere. */ 2267 /* If the symbol is weak, we do need to clear the value. 2268 Otherwise, the PLT entry would provide a definition for 2269 the symbol even if the symbol wasn't defined anywhere, 2270 and so the symbol would never be NULL. */ 2271 if (!h->ref_regular_nonweak) 2272 sym->st_value = 0; 2273 } 2274 } 2275 2276 /* For an ordinary program, we emit .got relocs only for symbols that 2277 are in the dynamic-symbols table and are either defined by the 2278 program or are undefined weak symbols, or are function symbols 2279 where we do not output a PLT: the PLT reloc was output above and all 2280 references to the function symbol are redirected to the PLT. */ 2281 if (h->got.offset != (bfd_vma) -1 2282 && (elf_cris_hash_entry (h)->reg_got_refcount > 0) 2283 && (info->shared 2284 || (h->dynindx != -1 2285 && h->plt.offset == (bfd_vma) -1 2286 && !h->def_regular 2287 && h->root.type != bfd_link_hash_undefweak))) 2288 { 2289 asection *sgot; 2290 asection *srela; 2291 Elf_Internal_Rela rela; 2292 bfd_byte *loc; 2293 bfd_byte *where; 2294 2295 /* This symbol has an entry in the global offset table. Set it up. */ 2296 2297 sgot = bfd_get_section_by_name (dynobj, ".got"); 2298 srela = bfd_get_section_by_name (dynobj, ".rela.got"); 2299 BFD_ASSERT (sgot != NULL && srela != NULL); 2300 2301 rela.r_offset = (sgot->output_section->vma 2302 + sgot->output_offset 2303 + (h->got.offset &~ (bfd_vma) 1)); 2304 2305 /* If this is a static link, or it is a -Bsymbolic link and the 2306 symbol is defined locally or was forced to be local because 2307 of a version file, we just want to emit a RELATIVE reloc. 2308 The entry in the global offset table will already have been 2309 initialized in the relocate_section function. */ 2310 where = sgot->contents + (h->got.offset &~ (bfd_vma) 1); 2311 if (! elf_hash_table (info)->dynamic_sections_created 2312 || (info->shared 2313 && (info->symbolic || h->dynindx == -1) 2314 && h->def_regular)) 2315 { 2316 rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE); 2317 rela.r_addend = bfd_get_signed_32 (output_bfd, where); 2318 } 2319 else 2320 { 2321 bfd_put_32 (output_bfd, (bfd_vma) 0, where); 2322 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT); 2323 rela.r_addend = 0; 2324 } 2325 2326 loc = srela->contents; 2327 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); 2328 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 2329 } 2330 2331 if (h->needs_copy) 2332 { 2333 asection *s; 2334 Elf_Internal_Rela rela; 2335 bfd_byte *loc; 2336 2337 /* This symbol needs a copy reloc. Set it up. */ 2338 2339 BFD_ASSERT (h->dynindx != -1 2340 && (h->root.type == bfd_link_hash_defined 2341 || h->root.type == bfd_link_hash_defweak)); 2342 2343 s = bfd_get_section_by_name (h->root.u.def.section->owner, 2344 ".rela.bss"); 2345 BFD_ASSERT (s != NULL); 2346 2347 rela.r_offset = (h->root.u.def.value 2348 + h->root.u.def.section->output_section->vma 2349 + h->root.u.def.section->output_offset); 2350 rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY); 2351 rela.r_addend = 0; 2352 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 2353 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 2354 } 2355 2356 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ 2357 if (strcmp (h->root.root.string, "_DYNAMIC") == 0 2358 || h == elf_hash_table (info)->hgot) 2359 sym->st_shndx = SHN_ABS; 2360 2361 return TRUE; 2362 } 2363 2364 /* Finish up the dynamic sections. Do *not* emit relocs here, as their 2366 offsets were changed, as part of -z combreloc handling, from those we 2367 computed. */ 2368 2369 static bfd_boolean 2370 elf_cris_finish_dynamic_sections (output_bfd, info) 2371 bfd *output_bfd; 2372 struct bfd_link_info *info; 2373 { 2374 bfd *dynobj; 2375 asection *sgot; 2376 asection *sdyn; 2377 2378 dynobj = elf_hash_table (info)->dynobj; 2379 2380 sgot = bfd_get_section_by_name (dynobj, ".got.plt"); 2381 BFD_ASSERT (sgot != NULL); 2382 sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); 2383 2384 if (elf_hash_table (info)->dynamic_sections_created) 2385 { 2386 asection *splt; 2387 Elf32_External_Dyn *dyncon, *dynconend; 2388 2389 splt = bfd_get_section_by_name (dynobj, ".plt"); 2390 BFD_ASSERT (splt != NULL && sdyn != NULL); 2391 2392 dyncon = (Elf32_External_Dyn *) sdyn->contents; 2393 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 2394 for (; dyncon < dynconend; dyncon++) 2395 { 2396 Elf_Internal_Dyn dyn; 2397 asection *s; 2398 2399 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 2400 2401 switch (dyn.d_tag) 2402 { 2403 default: 2404 break; 2405 2406 case DT_PLTGOT: 2407 s = bfd_get_section_by_name (output_bfd, ".got"); 2408 BFD_ASSERT (s != NULL); 2409 dyn.d_un.d_ptr = s->vma; 2410 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2411 break; 2412 2413 case DT_JMPREL: 2414 /* Yes, we *can* have a .plt and no .plt.rela, for instance 2415 if all symbols are found in the .got (not .got.plt). */ 2416 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 2417 dyn.d_un.d_ptr = s != NULL ? s->vma : 0; 2418 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2419 break; 2420 2421 case DT_PLTRELSZ: 2422 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 2423 if (s == NULL) 2424 dyn.d_un.d_val = 0; 2425 else 2426 dyn.d_un.d_val = s->size; 2427 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2428 break; 2429 2430 case DT_RELASZ: 2431 /* The procedure linkage table relocs (DT_JMPREL) should 2432 not be included in the overall relocs (DT_RELA). 2433 Therefore, we override the DT_RELASZ entry here to 2434 make it not include the JMPREL relocs. Since the 2435 linker script arranges for .rela.plt to follow all 2436 other relocation sections, we don't have to worry 2437 about changing the DT_RELA entry. */ 2438 s = bfd_get_section_by_name (output_bfd, ".rela.plt"); 2439 if (s != NULL) 2440 dyn.d_un.d_val -= s->size; 2441 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 2442 break; 2443 } 2444 } 2445 2446 /* Fill in the first entry in the procedure linkage table. */ 2447 if (splt->size > 0) 2448 { 2449 if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32) 2450 { 2451 if (info->shared) 2452 memcpy (splt->contents, elf_cris_pic_plt0_entry_v32, 2453 PLT_ENTRY_SIZE_V32); 2454 else 2455 { 2456 memcpy (splt->contents, elf_cris_plt0_entry_v32, 2457 PLT_ENTRY_SIZE_V32); 2458 bfd_put_32 (output_bfd, 2459 sgot->output_section->vma 2460 + sgot->output_offset + 4, 2461 splt->contents + 4); 2462 2463 elf_section_data (splt->output_section)->this_hdr.sh_entsize 2464 = PLT_ENTRY_SIZE_V32; 2465 } 2466 } 2467 else 2468 { 2469 if (info->shared) 2470 memcpy (splt->contents, elf_cris_pic_plt0_entry, 2471 PLT_ENTRY_SIZE); 2472 else 2473 { 2474 memcpy (splt->contents, elf_cris_plt0_entry, 2475 PLT_ENTRY_SIZE); 2476 bfd_put_32 (output_bfd, 2477 sgot->output_section->vma 2478 + sgot->output_offset + 4, 2479 splt->contents + 6); 2480 bfd_put_32 (output_bfd, 2481 sgot->output_section->vma 2482 + sgot->output_offset + 8, 2483 splt->contents + 14); 2484 2485 elf_section_data (splt->output_section)->this_hdr.sh_entsize 2486 = PLT_ENTRY_SIZE; 2487 } 2488 } 2489 } 2490 } 2491 2492 /* Fill in the first three entries in the global offset table. */ 2493 if (sgot->size > 0) 2494 { 2495 if (sdyn == NULL) 2496 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 2497 else 2498 bfd_put_32 (output_bfd, 2499 sdyn->output_section->vma + sdyn->output_offset, 2500 sgot->contents); 2501 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); 2502 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); 2503 } 2504 2505 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 2506 2507 return TRUE; 2508 } 2509 2510 /* Return the section that should be marked against GC for a given 2512 relocation. */ 2513 2514 static asection * 2515 cris_elf_gc_mark_hook (asection *sec, 2516 struct bfd_link_info *info, 2517 Elf_Internal_Rela *rel, 2518 struct elf_link_hash_entry *h, 2519 Elf_Internal_Sym *sym) 2520 { 2521 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info); 2522 if (h != NULL) 2523 switch (r_type) 2524 { 2525 case R_CRIS_GNU_VTINHERIT: 2526 case R_CRIS_GNU_VTENTRY: 2527 return NULL; 2528 2529 default: 2530 break; 2531 } 2532 2533 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 2534 } 2535 2536 /* Update the got entry reference counts for the section being removed. */ 2537 2538 static bfd_boolean 2539 cris_elf_gc_sweep_hook (bfd *abfd, 2540 struct bfd_link_info *info, 2541 asection *sec, 2542 const Elf_Internal_Rela *relocs) 2543 { 2544 struct elf_cris_link_hash_table * htab; 2545 Elf_Internal_Shdr *symtab_hdr; 2546 struct elf_link_hash_entry **sym_hashes; 2547 bfd_signed_vma *local_got_refcounts; 2548 const Elf_Internal_Rela *rel, *relend; 2549 bfd *dynobj; 2550 asection *sgot; 2551 asection *srelgot; 2552 2553 if (info->relocatable) 2554 return TRUE; 2555 2556 dynobj = elf_hash_table (info)->dynobj; 2557 if (dynobj == NULL) 2558 return TRUE; 2559 2560 htab = elf_cris_hash_table (info); 2561 if (htab == NULL) 2562 return FALSE; 2563 2564 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 2565 sym_hashes = elf_sym_hashes (abfd); 2566 local_got_refcounts = elf_local_got_refcounts (abfd); 2567 2568 sgot = bfd_get_section_by_name (dynobj, ".got"); 2569 srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); 2570 2571 relend = relocs + sec->reloc_count; 2572 for (rel = relocs; rel < relend; rel++) 2573 { 2574 unsigned long r_symndx; 2575 struct elf_link_hash_entry *h = NULL; 2576 bfd_signed_vma got_element_size = 4; 2577 bfd_signed_vma *specific_refcount = NULL; 2578 enum elf_cris_reloc_type r_type; 2579 2580 r_symndx = ELF32_R_SYM (rel->r_info); 2581 if (r_symndx >= symtab_hdr->sh_info) 2582 { 2583 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 2584 while (h->root.type == bfd_link_hash_indirect 2585 || h->root.type == bfd_link_hash_warning) 2586 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2587 } 2588 2589 r_type = ELF32_R_TYPE (rel->r_info); 2590 switch (r_type) 2591 { 2592 case R_CRIS_32_GOT: 2593 case R_CRIS_16_GOT: 2594 case R_CRIS_16_GOTPLT: 2595 case R_CRIS_32_GOTPLT: 2596 specific_refcount = h != NULL 2597 ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount 2598 : &local_got_refcounts[LGOT_REG_NDX (r_symndx)]; 2599 break; 2600 2601 case R_CRIS_32_GD: 2602 case R_CRIS_32_GOT_GD: 2603 case R_CRIS_16_GOT_GD: 2604 got_element_size = 8; 2605 specific_refcount = h != NULL 2606 ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount 2607 : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)]; 2608 break; 2609 2610 case R_CRIS_32_IE: 2611 case R_CRIS_16_GOT_TPREL: 2612 case R_CRIS_32_GOT_TPREL: 2613 specific_refcount = h != NULL 2614 ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount 2615 : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)]; 2616 break; 2617 2618 default: 2619 break; 2620 } 2621 2622 switch (r_type) 2623 { 2624 case R_CRIS_32_IE: 2625 case R_CRIS_32_GD: 2626 case R_CRIS_16_GOT_TPREL: 2627 case R_CRIS_32_GOT_TPREL: 2628 case R_CRIS_32_GOT_GD: 2629 case R_CRIS_16_GOT_GD: 2630 case R_CRIS_16_GOT: 2631 case R_CRIS_32_GOT: 2632 if (h != NULL) 2633 { 2634 /* If the counters are 0 when we got here, we've 2635 miscounted somehow somewhere, an internal error. */ 2636 BFD_ASSERT (h->got.refcount > 0); 2637 --h->got.refcount; 2638 2639 BFD_ASSERT (*specific_refcount > 0); 2640 --*specific_refcount; 2641 if (*specific_refcount == 0) 2642 { 2643 /* We don't need the .got entry any more. */ 2644 sgot->size -= got_element_size; 2645 srelgot->size -= sizeof (Elf32_External_Rela); 2646 } 2647 break; 2648 } 2649 2650 local_got_reloc: 2651 if (local_got_refcounts != NULL) 2652 { 2653 /* If the counters are 0 when we got here, we've 2654 miscounted somehow somewhere, an internal error. */ 2655 BFD_ASSERT (local_got_refcounts[r_symndx] > 0); 2656 --local_got_refcounts[r_symndx]; 2657 2658 BFD_ASSERT (*specific_refcount > 0); 2659 --*specific_refcount; 2660 if (*specific_refcount == 0) 2661 { 2662 /* We don't need the .got entry any more. */ 2663 sgot->size -= got_element_size; 2664 if (info->shared) 2665 srelgot->size -= sizeof (Elf32_External_Rela); 2666 } 2667 } 2668 break; 2669 2670 case R_CRIS_16_GOTPLT: 2671 case R_CRIS_32_GOTPLT: 2672 /* For local symbols, treat these like GOT relocs. */ 2673 if (h == NULL) 2674 goto local_got_reloc; 2675 /* Fall through. */ 2676 2677 case R_CRIS_32_PLT_GOTREL: 2678 /* FIXME: We don't garbage-collect away the .got section. */ 2679 if (local_got_refcounts != NULL) 2680 local_got_refcounts[-1]--; 2681 /* Fall through. */ 2682 2683 case R_CRIS_8_PCREL: 2684 case R_CRIS_16_PCREL: 2685 case R_CRIS_32_PCREL: 2686 case R_CRIS_32_PLT_PCREL: 2687 if (h != NULL) 2688 { 2689 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 2690 && h->plt.refcount > 0) 2691 --h->plt.refcount; 2692 } 2693 break; 2694 2695 case R_CRIS_32_DTPREL: 2696 /* This'd be a .dtpreld entry in e.g. debug info. */ 2697 if ((sec->flags & SEC_ALLOC) == 0) 2698 break; 2699 /* Fall through. */ 2700 case R_CRIS_16_DTPREL: 2701 htab->dtpmod_refcount--; 2702 if (htab->dtpmod_refcount == 0) 2703 htab->next_gotplt_entry -= 8; 2704 BFD_ASSERT (local_got_refcounts != NULL); 2705 local_got_refcounts[-1]--; 2706 break; 2707 2708 default: 2709 break; 2710 } 2711 } 2712 2713 return TRUE; 2714 } 2715 2716 /* The elf_backend_plt_sym_val hook function. */ 2717 2718 static bfd_vma 2719 cris_elf_plt_sym_val (bfd_vma i, const asection *plt, 2720 const arelent *rel ATTRIBUTE_UNUSED) 2721 { 2722 bfd_size_type plt_entry_size; 2723 2724 plt_entry_size 2725 = (bfd_get_mach (plt->owner) == bfd_mach_cris_v32 2726 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE); 2727 2728 return plt->vma + (i + 1) * plt_entry_size; 2729 } 2730 2731 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT 2732 entry but we found we will not create any. Called when we find we will 2733 not have any PLT for this symbol, by for example 2734 elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link, 2735 or elf_cris_size_dynamic_sections if no dynamic sections will be 2736 created (we're only linking static objects). */ 2737 2738 static bfd_boolean 2739 elf_cris_adjust_gotplt_to_got (h, p) 2740 struct elf_cris_link_hash_entry *h; 2741 PTR p; 2742 { 2743 struct bfd_link_info *info = (struct bfd_link_info *) p; 2744 2745 if (h->root.root.type == bfd_link_hash_warning) 2746 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link; 2747 2748 /* If nobody wanted a GOTPLT with this symbol, we're done. */ 2749 if (h->gotplt_refcount <= 0) 2750 return TRUE; 2751 2752 if (h->reg_got_refcount > 0) 2753 { 2754 /* There's a GOT entry for this symbol. Just adjust the refcounts. 2755 Probably not necessary at this stage, but keeping them accurate 2756 helps avoiding surprises later. */ 2757 h->root.got.refcount += h->gotplt_refcount; 2758 h->reg_got_refcount += h->gotplt_refcount; 2759 h->gotplt_refcount = 0; 2760 } 2761 else 2762 { 2763 /* No GOT entry for this symbol. We need to create one. */ 2764 bfd *dynobj = elf_hash_table (info)->dynobj; 2765 asection *sgot; 2766 asection *srelgot; 2767 2768 BFD_ASSERT (dynobj != NULL); 2769 sgot = bfd_get_section_by_name (dynobj, ".got"); 2770 srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); 2771 2772 /* Put accurate refcounts there. */ 2773 h->root.got.refcount += h->gotplt_refcount; 2774 h->reg_got_refcount = h->gotplt_refcount; 2775 2776 h->gotplt_refcount = 0; 2777 2778 /* We always have a .got and a .rela.got section if there were 2779 GOTPLT relocs in input. */ 2780 BFD_ASSERT (sgot != NULL && srelgot != NULL); 2781 2782 /* Allocate space in the .got section. */ 2783 sgot->size += 4; 2784 2785 /* Allocate relocation space. */ 2786 srelgot->size += sizeof (Elf32_External_Rela); 2787 } 2788 2789 return TRUE; 2790 } 2791 2792 /* Try to fold PLT entries with GOT entries. There are two cases when we 2793 want to do this: 2794 2795 - When all PLT references are GOTPLT references, and there are GOT 2796 references, and this is not the executable. We don't have to 2797 generate a PLT at all. 2798 2799 - When there are both (ordinary) PLT references and GOT references, 2800 and this isn't the executable. 2801 We want to make the PLT reference use the ordinary GOT entry rather 2802 than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry, 2803 since the GOT entry will have to be resolved at startup anyway. 2804 2805 Though the latter case is handled when room for the PLT is allocated, 2806 not here. 2807 2808 By folding into the GOT, we may need a round-trip to a PLT in the 2809 executable for calls, a loss in performance. Still, losing a 2810 reloc is a win in size and at least in start-up time. 2811 2812 Note that this function is called before symbols are forced local by 2813 version scripts. The differing cases are handled by 2814 elf_cris_hide_symbol. */ 2815 2816 static bfd_boolean 2817 elf_cris_try_fold_plt_to_got (h, p) 2818 struct elf_cris_link_hash_entry *h; 2819 PTR p; 2820 { 2821 struct bfd_link_info *info = (struct bfd_link_info *) p; 2822 2823 /* If there are no GOT references for this symbol, we can't fold any 2824 other reference so there's nothing to do. Likewise if there are no 2825 PLT references; GOTPLT references included. */ 2826 if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0) 2827 return TRUE; 2828 2829 /* GOTPLT relocs are supposed to be included into the PLT refcount. */ 2830 BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount); 2831 2832 if (h->gotplt_refcount == h->root.plt.refcount) 2833 { 2834 /* The only PLT references are GOTPLT references, and there are GOT 2835 references. Convert PLT to GOT references. */ 2836 if (! elf_cris_adjust_gotplt_to_got (h, info)) 2837 return FALSE; 2838 2839 /* Clear the PLT references, so no PLT will be created. */ 2840 h->root.plt.offset = (bfd_vma) -1; 2841 } 2842 2843 return TRUE; 2844 } 2845 2846 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc 2847 to use a GOT entry (and create one) rather than requiring a GOTPLT 2848 entry. */ 2849 2850 static void 2851 elf_cris_hide_symbol (info, h, force_local) 2852 struct bfd_link_info *info; 2853 struct elf_link_hash_entry *h; 2854 bfd_boolean force_local; 2855 { 2856 elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info); 2857 2858 _bfd_elf_link_hash_hide_symbol (info, h, force_local); 2859 } 2860 2861 /* Adjust a symbol defined by a dynamic object and referenced by a 2862 regular object. The current definition is in some section of the 2863 dynamic object, but we're not including those sections. We have to 2864 change the definition to something the rest of the link can 2865 understand. */ 2866 2867 static bfd_boolean 2868 elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info, 2869 struct elf_link_hash_entry *h) 2870 { 2871 struct elf_cris_link_hash_table * htab; 2872 bfd *dynobj; 2873 asection *s; 2874 bfd_size_type plt_entry_size; 2875 2876 htab = elf_cris_hash_table (info); 2877 if (htab == NULL) 2878 return FALSE; 2879 2880 dynobj = elf_hash_table (info)->dynobj; 2881 2882 /* Make sure we know what is going on here. */ 2883 BFD_ASSERT (dynobj != NULL 2884 && (h->needs_plt 2885 || h->u.weakdef != NULL 2886 || (h->def_dynamic 2887 && h->ref_regular 2888 && !h->def_regular))); 2889 2890 plt_entry_size 2891 = (bfd_get_mach (dynobj) == bfd_mach_cris_v32 2892 ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE); 2893 2894 /* If this is a function, put it in the procedure linkage table. We 2895 will fill in the contents of the procedure linkage table later, 2896 when we know the address of the .got section. */ 2897 if (h->type == STT_FUNC 2898 || h->needs_plt) 2899 { 2900 /* If we link a program (not a DSO), we'll get rid of unnecessary 2901 PLT entries; we point to the actual symbols -- even for pic 2902 relocs, because a program built with -fpic should have the same 2903 result as one built without -fpic, specifically considering weak 2904 symbols. 2905 FIXME: m68k and i386 differ here, for unclear reasons. */ 2906 if (! info->shared 2907 && !h->def_dynamic) 2908 { 2909 /* This case can occur if we saw a PLT reloc in an input file, 2910 but the symbol was not defined by a dynamic object. In such 2911 a case, we don't actually need to build a procedure linkage 2912 table, and we can just do an absolute or PC reloc instead, or 2913 change a .got.plt index to a .got index for GOTPLT relocs. */ 2914 BFD_ASSERT (h->needs_plt); 2915 h->needs_plt = 0; 2916 h->plt.offset = (bfd_vma) -1; 2917 return 2918 elf_cris_adjust_gotplt_to_got ((struct 2919 elf_cris_link_hash_entry *) h, 2920 info); 2921 } 2922 2923 /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT; 2924 where a pointer-equivalent symbol was unimportant (i.e. more 2925 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid 2926 of the PLT. We can't for the executable, because the GOT 2927 entries will point to the PLT there (and be constant). */ 2928 if (info->shared 2929 && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*) 2930 h, info)) 2931 return FALSE; 2932 2933 /* GC or folding may have rendered this entry unused. */ 2934 if (h->plt.refcount <= 0) 2935 { 2936 h->needs_plt = 0; 2937 h->plt.offset = (bfd_vma) -1; 2938 return TRUE; 2939 } 2940 2941 /* Make sure this symbol is output as a dynamic symbol. */ 2942 if (h->dynindx == -1) 2943 { 2944 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2945 return FALSE; 2946 } 2947 2948 s = bfd_get_section_by_name (dynobj, ".plt"); 2949 BFD_ASSERT (s != NULL); 2950 2951 /* If this is the first .plt entry, make room for the special 2952 first entry. */ 2953 if (s->size == 0) 2954 s->size += plt_entry_size; 2955 2956 /* If this symbol is not defined in a regular file, and we are 2957 not generating a shared library, then set the symbol to this 2958 location in the .plt. */ 2959 if (!info->shared 2960 && !h->def_regular) 2961 { 2962 h->root.u.def.section = s; 2963 h->root.u.def.value = s->size; 2964 } 2965 2966 /* If there's already a GOT entry, use that, not a .got.plt. A 2967 GOT field still has a reference count when we get here; it's 2968 not yet changed to an offset. We can't do this for an 2969 executable, because then the reloc associated with the PLT 2970 would get a non-PLT reloc pointing to the PLT. FIXME: Move 2971 this to elf_cris_try_fold_plt_to_got. */ 2972 if (info->shared && h->got.refcount > 0) 2973 { 2974 h->got.refcount += h->plt.refcount; 2975 2976 /* Mark the PLT offset to use the GOT entry by setting the low 2977 bit in the plt offset; it is always a multiple of 2978 plt_entry_size (which is at least a multiple of 2). */ 2979 BFD_ASSERT ((s->size % plt_entry_size) == 0); 2980 2981 /* Change the PLT refcount to an offset. */ 2982 h->plt.offset = s->size; 2983 2984 /* By not setting gotplt_offset (i.e. it remains at 0), we signal 2985 that the got entry should be used instead. */ 2986 BFD_ASSERT (((struct elf_cris_link_hash_entry *) 2987 h)->gotplt_offset == 0); 2988 2989 /* Make room for this entry. */ 2990 s->size += plt_entry_size; 2991 2992 return TRUE; 2993 } 2994 2995 /* No GOT reference for this symbol; prepare for an ordinary PLT. */ 2996 h->plt.offset = s->size; 2997 2998 /* Make room for this entry. */ 2999 s->size += plt_entry_size; 3000 3001 /* We also need to make an entry in the .got.plt section, which 3002 will be placed in the .got section by the linker script. */ 3003 ((struct elf_cris_link_hash_entry *) h)->gotplt_offset 3004 = htab->next_gotplt_entry; 3005 htab->next_gotplt_entry += 4; 3006 3007 s = bfd_get_section_by_name (dynobj, ".got.plt"); 3008 BFD_ASSERT (s != NULL); 3009 s->size += 4; 3010 3011 /* We also need to make an entry in the .rela.plt section. */ 3012 3013 s = bfd_get_section_by_name (dynobj, ".rela.plt"); 3014 BFD_ASSERT (s != NULL); 3015 s->size += sizeof (Elf32_External_Rela); 3016 3017 return TRUE; 3018 } 3019 3020 /* Reinitialize the plt offset now that it is not used as a reference 3021 count any more. */ 3022 h->plt.offset = (bfd_vma) -1; 3023 3024 /* If this is a weak symbol, and there is a real definition, the 3025 processor independent code will have arranged for us to see the 3026 real definition first, and we can just use the same value. */ 3027 if (h->u.weakdef != NULL) 3028 { 3029 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 3030 || h->u.weakdef->root.type == bfd_link_hash_defweak); 3031 h->root.u.def.section = h->u.weakdef->root.u.def.section; 3032 h->root.u.def.value = h->u.weakdef->root.u.def.value; 3033 return TRUE; 3034 } 3035 3036 /* This is a reference to a symbol defined by a dynamic object which 3037 is not a function. */ 3038 3039 /* If we are creating a shared library, we must presume that the 3040 only references to the symbol are via the global offset table. 3041 For such cases we need not do anything here; the relocations will 3042 be handled correctly by relocate_section. */ 3043 if (info->shared) 3044 return TRUE; 3045 3046 /* If there are no references to this symbol that do not use the 3047 GOT, we don't need to generate a copy reloc. */ 3048 if (!h->non_got_ref) 3049 return TRUE; 3050 3051 if (h->size == 0) 3052 { 3053 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), 3054 h->root.root.string); 3055 return TRUE; 3056 } 3057 3058 /* We must allocate the symbol in our .dynbss section, which will 3059 become part of the .bss section of the executable. There will be 3060 an entry for this symbol in the .dynsym section. The dynamic 3061 object will contain position independent code, so all references 3062 from the dynamic object to this symbol will go through the global 3063 offset table. The dynamic linker will use the .dynsym entry to 3064 determine the address it must put in the global offset table, so 3065 both the dynamic object and the regular object will refer to the 3066 same memory location for the variable. */ 3067 3068 s = bfd_get_section_by_name (dynobj, ".dynbss"); 3069 BFD_ASSERT (s != NULL); 3070 3071 /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to 3072 copy the initial value out of the dynamic object and into the 3073 runtime process image. We need to remember the offset into the 3074 .rela.bss section we are going to use. */ 3075 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) 3076 { 3077 asection *srel; 3078 3079 srel = bfd_get_section_by_name (dynobj, ".rela.bss"); 3080 BFD_ASSERT (srel != NULL); 3081 srel->size += sizeof (Elf32_External_Rela); 3082 h->needs_copy = 1; 3083 } 3084 3085 return _bfd_elf_adjust_dynamic_copy (h, s); 3086 } 3087 3088 /* Adjust our "subclass" elements for an indirect symbol. */ 3089 3090 static void 3091 elf_cris_copy_indirect_symbol (struct bfd_link_info *info, 3092 struct elf_link_hash_entry *dir, 3093 struct elf_link_hash_entry *ind) 3094 { 3095 struct elf_cris_link_hash_entry *edir, *eind; 3096 3097 edir = (struct elf_cris_link_hash_entry *) dir; 3098 eind = (struct elf_cris_link_hash_entry *) ind; 3099 3100 /* Only indirect symbols are replaced; we're not interested in 3101 updating any of EIND's fields for other symbols. */ 3102 if (eind->root.root.type != bfd_link_hash_indirect) 3103 { 3104 /* Still, we need to copy flags for e.g. weak definitions. */ 3105 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 3106 return; 3107 } 3108 3109 BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0); 3110 3111 #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z 3112 #define XMOVE(F) XMOVOPZ (F, +=, 0) 3113 if (eind->pcrel_relocs_copied != NULL) 3114 { 3115 if (edir->pcrel_relocs_copied != NULL) 3116 { 3117 struct elf_cris_pcrel_relocs_copied **pp; 3118 struct elf_cris_pcrel_relocs_copied *p; 3119 3120 /* Add reloc counts against the indirect sym to the direct sym 3121 list. Merge any entries against the same section. */ 3122 for (pp = &eind->pcrel_relocs_copied; *pp != NULL;) 3123 { 3124 struct elf_cris_pcrel_relocs_copied *q; 3125 p = *pp; 3126 for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next) 3127 if (q->section == p->section) 3128 { 3129 q->count += p->count; 3130 *pp = p->next; 3131 break; 3132 } 3133 if (q == NULL) 3134 pp = &p->next; 3135 } 3136 *pp = edir->pcrel_relocs_copied; 3137 } 3138 XMOVOPZ (pcrel_relocs_copied, =, NULL); 3139 } 3140 XMOVE (gotplt_refcount); 3141 XMOVE (gotplt_offset); 3142 XMOVE (reg_got_refcount); 3143 XMOVE (tprel_refcount); 3144 XMOVE (dtp_refcount); 3145 #undef XMOVE 3146 #undef XMOVOPZ 3147 3148 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 3149 } 3150 3151 /* Look through the relocs for a section during the first phase. */ 3152 3153 static bfd_boolean 3154 cris_elf_check_relocs (bfd *abfd, 3155 struct bfd_link_info *info, 3156 asection *sec, 3157 const Elf_Internal_Rela *relocs) 3158 { 3159 struct elf_cris_link_hash_table * htab; 3160 bfd *dynobj; 3161 Elf_Internal_Shdr *symtab_hdr; 3162 struct elf_link_hash_entry **sym_hashes; 3163 bfd_signed_vma *local_got_refcounts; 3164 const Elf_Internal_Rela *rel; 3165 const Elf_Internal_Rela *rel_end; 3166 asection *sgot; 3167 asection *srelgot; 3168 asection *sreloc; 3169 3170 if (info->relocatable) 3171 return TRUE; 3172 3173 htab = elf_cris_hash_table (info); 3174 if (htab == NULL) 3175 return FALSE; 3176 3177 dynobj = elf_hash_table (info)->dynobj; 3178 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 3179 sym_hashes = elf_sym_hashes (abfd); 3180 local_got_refcounts = elf_local_got_refcounts (abfd); 3181 3182 sgot = NULL; 3183 srelgot = NULL; 3184 sreloc = NULL; 3185 3186 rel_end = relocs + sec->reloc_count; 3187 for (rel = relocs; rel < rel_end; rel++) 3188 { 3189 struct elf_link_hash_entry *h; 3190 unsigned long r_symndx; 3191 enum elf_cris_reloc_type r_type; 3192 bfd_signed_vma got_element_size = 4; 3193 unsigned long r_symndx_lgot = INT_MAX; 3194 3195 r_symndx = ELF32_R_SYM (rel->r_info); 3196 if (r_symndx < symtab_hdr->sh_info) 3197 { 3198 h = NULL; 3199 r_symndx_lgot = LGOT_REG_NDX (r_symndx); 3200 } 3201 else 3202 { 3203 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3204 while (h->root.type == bfd_link_hash_indirect 3205 || h->root.type == bfd_link_hash_warning) 3206 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3207 } 3208 3209 r_type = ELF32_R_TYPE (rel->r_info); 3210 3211 /* Some relocs require linker-created sections; we need to hang them 3212 on the first input bfd we found that contained dynamic relocs. */ 3213 switch (r_type) 3214 { 3215 case R_CRIS_32_DTPREL: 3216 if ((sec->flags & SEC_ALLOC) == 0) 3217 /* This'd be a .dtpreld entry in e.g. debug info. We have 3218 several different switch statements below, but none of 3219 that is needed; we need no preparations for resolving 3220 R_CRIS_32_DTPREL into a non-allocated section (debug 3221 info), so let's just move on to the next 3222 relocation. */ 3223 continue; 3224 /* Fall through. */ 3225 case R_CRIS_16_DTPREL: 3226 /* The first .got.plt entry is right after the R_CRIS_DTPMOD 3227 entry at index 3. */ 3228 if (htab->dtpmod_refcount == 0) 3229 htab->next_gotplt_entry += 8; 3230 3231 htab->dtpmod_refcount++; 3232 /* Fall through. */ 3233 3234 case R_CRIS_32_IE: 3235 case R_CRIS_32_GD: 3236 case R_CRIS_16_GOT_GD: 3237 case R_CRIS_32_GOT_GD: 3238 case R_CRIS_32_GOT_TPREL: 3239 case R_CRIS_16_GOT_TPREL: 3240 case R_CRIS_16_GOT: 3241 case R_CRIS_32_GOT: 3242 case R_CRIS_32_GOTREL: 3243 case R_CRIS_32_PLT_GOTREL: 3244 case R_CRIS_32_PLT_PCREL: 3245 case R_CRIS_16_GOTPLT: 3246 case R_CRIS_32_GOTPLT: 3247 if (dynobj == NULL) 3248 { 3249 elf_hash_table (info)->dynobj = dynobj = abfd; 3250 3251 /* We could handle this if we can get a handle on the 3252 output bfd in elf_cris_adjust_dynamic_symbol. Failing 3253 that, we must insist on dynobj being a specific mach. */ 3254 if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32) 3255 { 3256 (*_bfd_error_handler) 3257 (_("%B, section %A:\n v10/v32 compatible object %s" 3258 " must not contain a PIC relocation"), 3259 abfd, sec); 3260 return FALSE; 3261 } 3262 3263 /* Create the .got section, so we can assume it's always 3264 present whenever there's a dynobj. */ 3265 if (!_bfd_elf_create_got_section (dynobj, info)) 3266 return FALSE; 3267 } 3268 3269 if (sgot == NULL) 3270 sgot = bfd_get_section_by_name (dynobj, ".got"); 3271 3272 if (local_got_refcounts == NULL) 3273 { 3274 bfd_size_type amt; 3275 3276 /* We use index local_got_refcounts[-1] to count all 3277 GOT-relative relocations that do not have explicit 3278 GOT entries. */ 3279 amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1; 3280 amt *= sizeof (bfd_signed_vma); 3281 local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt)); 3282 if (local_got_refcounts == NULL) 3283 return FALSE; 3284 3285 local_got_refcounts++; 3286 elf_local_got_refcounts (abfd) = local_got_refcounts; 3287 } 3288 break; 3289 3290 default: 3291 break; 3292 } 3293 3294 /* Some relocs require a global offset table (but perhaps not a 3295 specific GOT entry). */ 3296 switch (r_type) 3297 { 3298 case R_CRIS_16_DTPREL: 3299 case R_CRIS_32_DTPREL: 3300 /* Not requesting .got.rela for an executable: the contents 3301 of the first entry is constant there. For a shared 3302 library, we need .got.rela for the R_CRIS_DTPMOD 3303 relocation at index 3. */ 3304 if (!info->shared) 3305 break; 3306 /* Fall through. */ 3307 3308 case R_CRIS_32_IE: 3309 case R_CRIS_32_GD: 3310 case R_CRIS_16_GOT_GD: 3311 case R_CRIS_32_GOT_GD: 3312 case R_CRIS_32_GOT_TPREL: 3313 case R_CRIS_16_GOT_TPREL: 3314 /* Fall through. */ 3315 3316 /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT 3317 entry only for local symbols. Unfortunately, we don't know 3318 until later on if there's a version script that forces the 3319 symbol local. We must have the .rela.got section in place 3320 before we know if the symbol looks global now, so we need 3321 to treat the reloc just like for R_CRIS_16_GOT and 3322 R_CRIS_32_GOT. */ 3323 case R_CRIS_16_GOTPLT: 3324 case R_CRIS_32_GOTPLT: 3325 case R_CRIS_16_GOT: 3326 case R_CRIS_32_GOT: 3327 if (srelgot == NULL 3328 && (h != NULL || info->shared)) 3329 { 3330 srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); 3331 if (srelgot == NULL) 3332 { 3333 srelgot = bfd_make_section_with_flags (dynobj, 3334 ".rela.got", 3335 (SEC_ALLOC 3336 | SEC_LOAD 3337 | SEC_HAS_CONTENTS 3338 | SEC_IN_MEMORY 3339 | SEC_LINKER_CREATED 3340 | SEC_READONLY)); 3341 if (srelgot == NULL 3342 || !bfd_set_section_alignment (dynobj, srelgot, 2)) 3343 return FALSE; 3344 } 3345 } 3346 break; 3347 3348 default: 3349 break; 3350 } 3351 3352 /* Warn and error for invalid input. */ 3353 switch (r_type) 3354 { 3355 case R_CRIS_32_IE: 3356 case R_CRIS_32_TPREL: 3357 case R_CRIS_16_TPREL: 3358 case R_CRIS_32_GD: 3359 if (info->shared) 3360 { 3361 (*_bfd_error_handler) 3362 (_("%B, section %A:\n relocation %s not valid" 3363 " in a shared object;" 3364 " typically an option mixup, recompile with -fPIC"), 3365 abfd, 3366 sec, 3367 cris_elf_howto_table[r_type].name); 3368 /* Don't return FALSE here; we want messages for all of 3369 these and the error behavior is ungraceful 3370 anyway. */ 3371 } 3372 default: 3373 break; 3374 } 3375 3376 switch (r_type) 3377 { 3378 case R_CRIS_32_GD: 3379 case R_CRIS_16_GOT_GD: 3380 case R_CRIS_32_GOT_GD: 3381 /* These are requests for tls_index entries, run-time R_CRIS_DTP. */ 3382 got_element_size = 8; 3383 r_symndx_lgot = LGOT_DTP_NDX (r_symndx); 3384 break; 3385 3386 case R_CRIS_16_DTPREL: 3387 case R_CRIS_32_DTPREL: 3388 /* These two just request for the constant-index 3389 module-local tls_index-sized GOT entry, which we add 3390 elsewhere. */ 3391 break; 3392 3393 case R_CRIS_32_IE: 3394 case R_CRIS_32_GOT_TPREL: 3395 case R_CRIS_16_GOT_TPREL: 3396 r_symndx_lgot = LGOT_TPREL_NDX (r_symndx); 3397 3398 /* Those relocs also require that a DSO is of type 3399 Initial Exec. Like other targets, we don't reset this 3400 flag even if the relocs are GC:ed away. */ 3401 if (info->shared) 3402 info->flags |= DF_STATIC_TLS; 3403 break; 3404 3405 /* Let's list the other assembler-generated TLS-relocs too, 3406 just to show that they're not forgotten. */ 3407 case R_CRIS_16_TPREL: 3408 case R_CRIS_32_TPREL: 3409 default: 3410 break; 3411 } 3412 3413 switch (r_type) 3414 { 3415 case R_CRIS_16_GOTPLT: 3416 case R_CRIS_32_GOTPLT: 3417 /* Mark that we need a GOT entry if the PLT entry (and its GOT 3418 entry) is eliminated. We can only do this for a non-local 3419 symbol. */ 3420 if (h != NULL) 3421 { 3422 elf_cris_hash_entry (h)->gotplt_refcount++; 3423 goto handle_gotplt_reloc; 3424 } 3425 /* If h is NULL then this is a local symbol, and we must make a 3426 GOT entry for it, so handle it like a GOT reloc. */ 3427 /* Fall through. */ 3428 3429 case R_CRIS_32_IE: 3430 case R_CRIS_32_GD: 3431 case R_CRIS_16_GOT_GD: 3432 case R_CRIS_32_GOT_GD: 3433 case R_CRIS_32_GOT_TPREL: 3434 case R_CRIS_16_GOT_TPREL: 3435 case R_CRIS_16_GOT: 3436 case R_CRIS_32_GOT: 3437 /* This symbol requires a global offset table entry. */ 3438 if (h != NULL) 3439 { 3440 if (h->got.refcount == 0) 3441 { 3442 /* Make sure this symbol is output as a dynamic symbol. */ 3443 if (h->dynindx == -1) 3444 { 3445 if (!bfd_elf_link_record_dynamic_symbol (info, h)) 3446 return FALSE; 3447 } 3448 } 3449 3450 /* Update the sum of reloc counts for this symbol. */ 3451 h->got.refcount++; 3452 3453 switch (r_type) 3454 { 3455 case R_CRIS_16_GOT: 3456 case R_CRIS_32_GOT: 3457 if (elf_cris_hash_entry (h)->reg_got_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)->reg_got_refcount++; 3465 break; 3466 3467 case R_CRIS_32_GD: 3468 case R_CRIS_16_GOT_GD: 3469 case R_CRIS_32_GOT_GD: 3470 if (elf_cris_hash_entry (h)->dtp_refcount == 0) 3471 { 3472 /* Allocate space in the .got section. */ 3473 sgot->size += got_element_size; 3474 /* Allocate relocation space. */ 3475 srelgot->size += sizeof (Elf32_External_Rela); 3476 } 3477 elf_cris_hash_entry (h)->dtp_refcount++; 3478 break; 3479 3480 case R_CRIS_32_IE: 3481 case R_CRIS_32_GOT_TPREL: 3482 case R_CRIS_16_GOT_TPREL: 3483 if (elf_cris_hash_entry (h)->tprel_refcount == 0) 3484 { 3485 /* Allocate space in the .got section. */ 3486 sgot->size += got_element_size; 3487 /* Allocate relocation space. */ 3488 srelgot->size += sizeof (Elf32_External_Rela); 3489 } 3490 elf_cris_hash_entry (h)->tprel_refcount++; 3491 break; 3492 3493 default: 3494 BFD_FAIL (); 3495 break; 3496 } 3497 } 3498 else 3499 { 3500 /* This is a global offset table entry for a local symbol. */ 3501 if (local_got_refcounts[r_symndx_lgot] == 0) 3502 { 3503 sgot->size += got_element_size; 3504 if (info->shared) 3505 { 3506 /* If we are generating a shared object, we need 3507 to output a R_CRIS_RELATIVE reloc so that the 3508 dynamic linker can adjust this GOT entry. 3509 Similarly for non-regular got entries. */ 3510 srelgot->size += sizeof (Elf32_External_Rela); 3511 } 3512 } 3513 /* Update the reloc-specific count. */ 3514 local_got_refcounts[r_symndx_lgot]++; 3515 3516 /* This one is the sum of all the others. */ 3517 local_got_refcounts[r_symndx]++; 3518 } 3519 break; 3520 3521 case R_CRIS_16_DTPREL: 3522 case R_CRIS_32_DTPREL: 3523 case R_CRIS_32_GOTREL: 3524 /* This reference requires a global offset table. 3525 FIXME: The actual refcount isn't used currently; the .got 3526 section can't be removed if there were any references in the 3527 input. */ 3528 local_got_refcounts[-1]++; 3529 break; 3530 3531 handle_gotplt_reloc: 3532 3533 case R_CRIS_32_PLT_GOTREL: 3534 /* This reference requires a global offset table. */ 3535 local_got_refcounts[-1]++; 3536 /* Fall through. */ 3537 3538 case R_CRIS_32_PLT_PCREL: 3539 /* This symbol requires a procedure linkage table entry. We 3540 actually build the entry in adjust_dynamic_symbol, 3541 because this might be a case of linking PIC code which is 3542 never referenced by a dynamic object, in which case we 3543 don't need to generate a procedure linkage table entry 3544 after all. */ 3545 3546 /* Beware: if we'd check for visibility of the symbol here 3547 (and not marking the need for a PLT when non-visible), we'd 3548 get into trouble with keeping handling consistent with 3549 regards to relocs found before definition and GOTPLT 3550 handling. Eliminable PLT entries will be dealt with later 3551 anyway. */ 3552 if (h == NULL) 3553 continue; 3554 3555 h->needs_plt = 1; 3556 h->plt.refcount++; 3557 break; 3558 3559 case R_CRIS_8: 3560 case R_CRIS_16: 3561 case R_CRIS_32: 3562 /* Let's help debug shared library creation. Any of these 3563 relocs *can* be used in shared libs, but pages containing 3564 them cannot be shared, so they're not appropriate for 3565 common use. Don't warn for sections we don't care about, 3566 such as debug sections or non-constant sections. We 3567 can't help tables of (global) function pointers, for 3568 example, though they must be emitted in a (writable) data 3569 section to avoid having impure text sections. */ 3570 if (info->shared 3571 && (sec->flags & SEC_ALLOC) != 0 3572 && (sec->flags & SEC_READONLY) != 0) 3573 { 3574 /* FIXME: How do we make this optionally a warning only? */ 3575 (*_bfd_error_handler) 3576 (_("%B, section %A:\n relocation %s should not" 3577 " be used in a shared object; recompile with -fPIC"), 3578 abfd, 3579 sec, 3580 cris_elf_howto_table[r_type].name); 3581 } 3582 if (h != NULL) 3583 { 3584 h->non_got_ref = 1; 3585 3586 /* Make sure a plt entry is created for this symbol if it 3587 turns out to be a function defined by a dynamic object. */ 3588 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) 3589 h->plt.refcount++; 3590 } 3591 3592 /* If we are creating a shared library and this is not a local 3593 symbol, we need to copy the reloc into the shared library. 3594 However when linking with -Bsymbolic and this is a global 3595 symbol which is defined in an object we are including in the 3596 link (i.e., DEF_REGULAR is set), then we can resolve the 3597 reloc directly. At this point we have not seen all the input 3598 files, so it is possible that DEF_REGULAR is not set now but 3599 will be set later (it is never cleared). In case of a weak 3600 definition, DEF_REGULAR may be cleared later by a strong 3601 definition in a shared library. We account for that 3602 possibility below by storing information in the relocs_copied 3603 field of the hash table entry. A similar situation occurs 3604 when creating shared libraries and symbol visibility changes 3605 render the symbol local. */ 3606 3607 /* No need to do anything if we're not creating a shared object. */ 3608 if (! info->shared) 3609 break; 3610 3611 /* We don't need to handle relocs into sections not going into 3612 the "real" output. */ 3613 if ((sec->flags & SEC_ALLOC) == 0) 3614 break; 3615 3616 /* We may need to create a reloc section in the dynobj and made room 3617 for this reloc. */ 3618 if (sreloc == NULL) 3619 { 3620 sreloc = _bfd_elf_make_dynamic_reloc_section 3621 (sec, dynobj, 2, abfd, /*rela?*/ TRUE); 3622 3623 if (sreloc == NULL) 3624 return FALSE; 3625 } 3626 3627 if (sec->flags & SEC_READONLY) 3628 info->flags |= DF_TEXTREL; 3629 3630 sreloc->size += sizeof (Elf32_External_Rela); 3631 break; 3632 3633 case R_CRIS_8_PCREL: 3634 case R_CRIS_16_PCREL: 3635 case R_CRIS_32_PCREL: 3636 if (h != NULL) 3637 { 3638 h->non_got_ref = 1; 3639 3640 /* Make sure a plt entry is created for this symbol if it 3641 turns out to be a function defined by a dynamic object. */ 3642 if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) 3643 h->plt.refcount++; 3644 } 3645 3646 /* If we are creating a shared library and this is not a local 3647 symbol, we need to copy the reloc into the shared library. 3648 However when linking with -Bsymbolic and this is a global 3649 symbol which is defined in an object we are including in the 3650 link (i.e., DEF_REGULAR is set), then we can resolve the 3651 reloc directly. At this point we have not seen all the input 3652 files, so it is possible that DEF_REGULAR is not set now but 3653 will be set later (it is never cleared). In case of a weak 3654 definition, DEF_REGULAR may be cleared later by a strong 3655 definition in a shared library. We account for that 3656 possibility below by storing information in the relocs_copied 3657 field of the hash table entry. A similar situation occurs 3658 when creating shared libraries and symbol visibility changes 3659 render the symbol local. */ 3660 3661 /* No need to do anything if we're not creating a shared object. */ 3662 if (! info->shared) 3663 break; 3664 3665 /* We don't need to handle relocs into sections not going into 3666 the "real" output. */ 3667 if ((sec->flags & SEC_ALLOC) == 0) 3668 break; 3669 3670 /* If the symbol is local, then we know already we can 3671 eliminate the reloc. */ 3672 if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 3673 break; 3674 3675 /* If this is with -Bsymbolic and the symbol isn't weak, and 3676 is defined by an ordinary object (the ones we include in 3677 this shared library) then we can also eliminate the 3678 reloc. See comment above for more eliminable cases which 3679 we can't identify at this time. */ 3680 if (info->symbolic 3681 && h->root.type != bfd_link_hash_defweak 3682 && h->def_regular) 3683 break; 3684 3685 /* We may need to create a reloc section in the dynobj and made room 3686 for this reloc. */ 3687 if (sreloc == NULL) 3688 { 3689 sreloc = _bfd_elf_make_dynamic_reloc_section 3690 (sec, dynobj, 2, abfd, /*rela?*/ TRUE); 3691 3692 if (sreloc == NULL) 3693 return FALSE; 3694 } 3695 3696 sreloc->size += sizeof (Elf32_External_Rela); 3697 3698 /* We count the number of PC relative relocations we have 3699 entered for this symbol, so that we can discard them 3700 again if the symbol is later defined by a regular object. 3701 We know that h is really a pointer to an 3702 elf_cris_link_hash_entry. */ 3703 { 3704 struct elf_cris_link_hash_entry *eh; 3705 struct elf_cris_pcrel_relocs_copied *p; 3706 3707 eh = elf_cris_hash_entry (h); 3708 3709 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) 3710 if (p->section == sec) 3711 break; 3712 3713 if (p == NULL) 3714 { 3715 p = ((struct elf_cris_pcrel_relocs_copied *) 3716 bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); 3717 if (p == NULL) 3718 return FALSE; 3719 p->next = eh->pcrel_relocs_copied; 3720 eh->pcrel_relocs_copied = p; 3721 p->section = sec; 3722 p->count = 0; 3723 p->r_type = r_type; 3724 } 3725 3726 ++p->count; 3727 } 3728 break; 3729 3730 /* This relocation describes the C++ object vtable hierarchy. 3731 Reconstruct it for later use during GC. */ 3732 case R_CRIS_GNU_VTINHERIT: 3733 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 3734 return FALSE; 3735 break; 3736 3737 /* This relocation describes which C++ vtable entries are actually 3738 used. Record for later use during GC. */ 3739 case R_CRIS_GNU_VTENTRY: 3740 BFD_ASSERT (h != NULL); 3741 if (h != NULL 3742 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 3743 return FALSE; 3744 break; 3745 3746 case R_CRIS_16_TPREL: 3747 case R_CRIS_32_TPREL: 3748 /* Already warned above, when necessary. */ 3749 break; 3750 3751 default: 3752 /* Other relocs do not appear here. */ 3753 bfd_set_error (bfd_error_bad_value); 3754 return FALSE; 3755 } 3756 } 3757 3758 return TRUE; 3759 } 3760 3761 /* Set the sizes of the dynamic sections. */ 3762 3763 static bfd_boolean 3764 elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 3765 struct bfd_link_info *info) 3766 { 3767 struct elf_cris_link_hash_table * htab; 3768 bfd *dynobj; 3769 asection *s; 3770 bfd_boolean plt; 3771 bfd_boolean relocs; 3772 3773 htab = elf_cris_hash_table (info); 3774 if (htab == NULL) 3775 return FALSE; 3776 3777 dynobj = elf_hash_table (info)->dynobj; 3778 BFD_ASSERT (dynobj != NULL); 3779 3780 if (elf_hash_table (info)->dynamic_sections_created) 3781 { 3782 /* Set the contents of the .interp section to the interpreter. */ 3783 if (info->executable) 3784 { 3785 s = bfd_get_section_by_name (dynobj, ".interp"); 3786 BFD_ASSERT (s != NULL); 3787 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 3788 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 3789 } 3790 } 3791 else 3792 { 3793 /* Adjust all expected GOTPLT uses to use a GOT entry instead. */ 3794 elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got, 3795 info); 3796 3797 /* We may have created entries in the .rela.got section. 3798 However, if we are not creating the dynamic sections, we will 3799 not actually use these entries. Reset the size of .rela.got, 3800 which will cause it to get stripped from the output file 3801 below. */ 3802 s = bfd_get_section_by_name (dynobj, ".rela.got"); 3803 if (s != NULL) 3804 s->size = 0; 3805 } 3806 3807 /* If this is a -Bsymbolic shared link, then we need to discard all PC 3808 relative relocs against symbols defined in a regular object. We 3809 allocated space for them in the check_relocs routine, but we will not 3810 fill them in in the relocate_section routine. We also discard space 3811 for relocs that have become for local symbols due to symbol 3812 visibility changes. For programs, we discard space for relocs for 3813 symbols not referenced by any dynamic object. */ 3814 if (info->shared) 3815 elf_cris_link_hash_traverse (htab, 3816 elf_cris_discard_excess_dso_dynamics, 3817 info); 3818 else 3819 elf_cris_link_hash_traverse (htab, 3820 elf_cris_discard_excess_program_dynamics, 3821 info); 3822 3823 /* The check_relocs and adjust_dynamic_symbol entry points have 3824 determined the sizes of the various dynamic sections. Allocate 3825 memory for them. */ 3826 plt = FALSE; 3827 relocs = FALSE; 3828 for (s = dynobj->sections; s != NULL; s = s->next) 3829 { 3830 const char *name; 3831 3832 if ((s->flags & SEC_LINKER_CREATED) == 0) 3833 continue; 3834 3835 /* It's OK to base decisions on the section name, because none 3836 of the dynobj section names depend upon the input files. */ 3837 name = bfd_get_section_name (dynobj, s); 3838 3839 if (strcmp (name, ".plt") == 0) 3840 { 3841 /* Remember whether there is a PLT. */ 3842 plt = s->size != 0; 3843 } 3844 else if (strcmp (name, ".got.plt") == 0) 3845 { 3846 /* The .got.plt contains the .got header as well as the 3847 actual .got.plt contents. The .got header may contain a 3848 R_CRIS_DTPMOD entry at index 3. */ 3849 s->size += htab->dtpmod_refcount != 0 3850 ? 8 : 0; 3851 } 3852 else if (CONST_STRNEQ (name, ".rela")) 3853 { 3854 if (strcmp (name, ".rela.got") == 0 3855 && htab->dtpmod_refcount != 0 3856 && info->shared) 3857 s->size += sizeof (Elf32_External_Rela); 3858 3859 if (s->size != 0) 3860 { 3861 /* Remember whether there are any reloc sections other 3862 than .rela.plt. */ 3863 if (strcmp (name, ".rela.plt") != 0) 3864 relocs = TRUE; 3865 3866 /* We use the reloc_count field as a counter if we need 3867 to copy relocs into the output file. */ 3868 s->reloc_count = 0; 3869 } 3870 } 3871 else if (! CONST_STRNEQ (name, ".got") 3872 && strcmp (name, ".dynbss") != 0) 3873 { 3874 /* It's not one of our sections, so don't allocate space. */ 3875 continue; 3876 } 3877 3878 if (s->size == 0) 3879 { 3880 /* If we don't need this section, strip it from the 3881 output file. This is mostly to handle .rela.bss and 3882 .rela.plt. We must create both sections in 3883 create_dynamic_sections, because they must be created 3884 before the linker maps input sections to output 3885 sections. The linker does that before 3886 adjust_dynamic_symbol is called, and it is that 3887 function which decides whether anything needs to go 3888 into these sections. */ 3889 s->flags |= SEC_EXCLUDE; 3890 continue; 3891 } 3892 3893 if ((s->flags & SEC_HAS_CONTENTS) == 0) 3894 continue; 3895 3896 /* Allocate memory for the section contents. We use bfd_zalloc here 3897 in case unused entries are not reclaimed before the section's 3898 contents are written out. This should not happen, but this way 3899 if it does, we will not write out garbage. For reloc sections, 3900 this will make entries have the type R_CRIS_NONE. */ 3901 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 3902 if (s->contents == NULL) 3903 return FALSE; 3904 } 3905 3906 if (elf_hash_table (info)->dynamic_sections_created) 3907 { 3908 /* Add some entries to the .dynamic section. We fill in the 3909 values later, in elf_cris_finish_dynamic_sections, but we 3910 must add the entries now so that we get the correct size for 3911 the .dynamic section. The DT_DEBUG entry is filled in by the 3912 dynamic linker and used by the debugger. */ 3913 #define add_dynamic_entry(TAG, VAL) \ 3914 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 3915 3916 if (!info->shared) 3917 { 3918 if (!add_dynamic_entry (DT_DEBUG, 0)) 3919 return FALSE; 3920 } 3921 3922 if (plt) 3923 { 3924 if (!add_dynamic_entry (DT_PLTGOT, 0) 3925 || !add_dynamic_entry (DT_PLTRELSZ, 0) 3926 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 3927 || !add_dynamic_entry (DT_JMPREL, 0)) 3928 return FALSE; 3929 } 3930 3931 if (relocs) 3932 { 3933 if (!add_dynamic_entry (DT_RELA, 0) 3934 || !add_dynamic_entry (DT_RELASZ, 0) 3935 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 3936 return FALSE; 3937 } 3938 3939 if ((info->flags & DF_TEXTREL) != 0) 3940 { 3941 if (!add_dynamic_entry (DT_TEXTREL, 0)) 3942 return FALSE; 3943 info->flags |= DF_TEXTREL; 3944 } 3945 } 3946 #undef add_dynamic_entry 3947 3948 return TRUE; 3949 } 3950 3951 /* This function is called via elf_cris_link_hash_traverse if we are 3952 creating a shared object. In the -Bsymbolic case, it discards the 3953 space allocated to copy PC relative relocs against symbols which 3954 are defined in regular objects. For the normal non-symbolic case, 3955 we also discard space for relocs that have become local due to 3956 symbol visibility changes. We allocated space for them in the 3957 check_relocs routine, but we won't fill them in in the 3958 relocate_section routine. */ 3959 3960 static bfd_boolean 3961 elf_cris_discard_excess_dso_dynamics (h, inf) 3962 struct elf_cris_link_hash_entry *h; 3963 PTR inf; 3964 { 3965 struct elf_cris_pcrel_relocs_copied *s; 3966 struct bfd_link_info *info = (struct bfd_link_info *) inf; 3967 3968 if (h->root.root.type == bfd_link_hash_warning) 3969 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link; 3970 3971 /* If a symbol has been forced local or we have found a regular 3972 definition for the symbolic link case, then we won't be needing 3973 any relocs. */ 3974 if (h->root.def_regular 3975 && (h->root.forced_local 3976 || info->symbolic)) 3977 { 3978 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) 3979 { 3980 asection *sreloc 3981 = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info) 3982 ->dynobj, 3983 s->section, 3984 /*rela?*/ TRUE); 3985 sreloc->size -= s->count * sizeof (Elf32_External_Rela); 3986 } 3987 return TRUE; 3988 } 3989 3990 /* If we have accounted for PC-relative relocs for read-only 3991 sections, now is the time to warn for them. We can't do it in 3992 cris_elf_check_relocs, because we don't know the status of all 3993 symbols at that time (and it's common to force symbols local 3994 late). */ 3995 3996 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) 3997 if ((s->section->flags & SEC_READONLY) != 0) 3998 { 3999 /* FIXME: How do we make this optionally a warning only? */ 4000 (*_bfd_error_handler) 4001 (_("%B, section `%A', to symbol `%s':\n" 4002 " relocation %s should not be used" 4003 " in a shared object; recompile with -fPIC"), 4004 s->section->owner, 4005 s->section, 4006 h->root.root.root.string, 4007 cris_elf_howto_table[s->r_type].name); 4008 4009 info->flags |= DF_TEXTREL; 4010 } 4011 4012 return TRUE; 4013 } 4014 4015 /* This function is called via elf_cris_link_hash_traverse if we are *not* 4016 creating a shared object. We discard space for relocs for symbols put 4017 in the .got, but which we found we do not have to resolve at run-time. */ 4018 4019 static bfd_boolean 4020 elf_cris_discard_excess_program_dynamics (h, inf) 4021 struct elf_cris_link_hash_entry *h; 4022 PTR inf; 4023 { 4024 struct bfd_link_info *info = (struct bfd_link_info *) inf; 4025 4026 if (h->root.root.type == bfd_link_hash_warning) 4027 h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link; 4028 4029 /* If we're not creating a shared library and have a symbol which is 4030 referred to by .got references, but the symbol is defined locally, 4031 (or rather, not defined by a DSO) then lose the reloc for the .got 4032 (don't allocate room for it). Likewise for relocs for something 4033 for which we create a PLT. */ 4034 if (!h->root.def_dynamic 4035 || h->root.plt.refcount > 0) 4036 { 4037 if (h->reg_got_refcount > 0 4038 /* The size of this section is only valid and in sync with the 4039 various reference counts if we do dynamic; don't decrement it 4040 otherwise. */ 4041 && elf_hash_table (info)->dynamic_sections_created) 4042 { 4043 bfd *dynobj = elf_hash_table (info)->dynobj; 4044 asection *srelgot; 4045 4046 BFD_ASSERT (dynobj != NULL); 4047 4048 srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); 4049 4050 BFD_ASSERT (srelgot != NULL); 4051 4052 srelgot->size -= sizeof (Elf32_External_Rela); 4053 } 4054 4055 /* If the locally-defined symbol isn't used by a DSO, then we don't 4056 have to export it as a dynamic symbol. This was already done for 4057 functions; doing this for all symbols would presumably not 4058 introduce new problems. Of course we don't do this if we're 4059 exporting all dynamic symbols. */ 4060 if (! info->export_dynamic 4061 && h->root.dynindx != -1 4062 && !h->root.def_dynamic 4063 && !h->root.ref_dynamic) 4064 { 4065 h->root.dynindx = -1; 4066 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 4067 h->root.dynstr_index); 4068 } 4069 } 4070 4071 return TRUE; 4072 } 4073 4074 /* Reject a file depending on presence and expectation of prefixed 4075 underscores on symbols. */ 4076 4077 static bfd_boolean 4078 cris_elf_object_p (abfd) 4079 bfd *abfd; 4080 { 4081 if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags)) 4082 return FALSE; 4083 4084 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)) 4085 return (bfd_get_symbol_leading_char (abfd) == '_'); 4086 else 4087 return (bfd_get_symbol_leading_char (abfd) == 0); 4088 } 4089 4090 /* Mark presence or absence of leading underscore. Set machine type 4091 flags from mach type. */ 4092 4093 static void 4094 cris_elf_final_write_processing (abfd, linker) 4095 bfd *abfd; 4096 bfd_boolean linker ATTRIBUTE_UNUSED; 4097 { 4098 unsigned long e_flags = elf_elfheader (abfd)->e_flags; 4099 4100 e_flags &= ~EF_CRIS_UNDERSCORE; 4101 if (bfd_get_symbol_leading_char (abfd) == '_') 4102 e_flags |= EF_CRIS_UNDERSCORE; 4103 4104 switch (bfd_get_mach (abfd)) 4105 { 4106 case bfd_mach_cris_v0_v10: 4107 e_flags |= EF_CRIS_VARIANT_ANY_V0_V10; 4108 break; 4109 4110 case bfd_mach_cris_v10_v32: 4111 e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32; 4112 break; 4113 4114 case bfd_mach_cris_v32: 4115 e_flags |= EF_CRIS_VARIANT_V32; 4116 break; 4117 4118 default: 4119 _bfd_abort (__FILE__, __LINE__, 4120 _("Unexpected machine number")); 4121 } 4122 4123 elf_elfheader (abfd)->e_flags = e_flags; 4124 } 4125 4126 /* Set the mach type from e_flags value. */ 4127 4128 static bfd_boolean 4129 cris_elf_set_mach_from_flags (abfd, flags) 4130 bfd *abfd; 4131 unsigned long flags; 4132 { 4133 switch (flags & EF_CRIS_VARIANT_MASK) 4134 { 4135 case EF_CRIS_VARIANT_ANY_V0_V10: 4136 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10); 4137 break; 4138 4139 case EF_CRIS_VARIANT_V32: 4140 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32); 4141 break; 4142 4143 case EF_CRIS_VARIANT_COMMON_V10_V32: 4144 bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32); 4145 break; 4146 4147 default: 4148 /* Since we don't recognize them, we obviously can't support them 4149 with this code; we'd have to require that all future handling 4150 would be optional. */ 4151 bfd_set_error (bfd_error_wrong_format); 4152 return FALSE; 4153 } 4154 4155 return TRUE; 4156 } 4157 4158 /* Display the flags field. */ 4159 4160 static bfd_boolean 4161 cris_elf_print_private_bfd_data (abfd, ptr) 4162 bfd *abfd; 4163 PTR ptr; 4164 { 4165 FILE *file = (FILE *) ptr; 4166 4167 BFD_ASSERT (abfd != NULL && ptr != NULL); 4168 4169 _bfd_elf_print_private_bfd_data (abfd, ptr); 4170 4171 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); 4172 4173 if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE) 4174 fprintf (file, _(" [symbols have a _ prefix]")); 4175 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK) 4176 == EF_CRIS_VARIANT_COMMON_V10_V32) 4177 fprintf (file, _(" [v10 and v32]")); 4178 if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK) 4179 == EF_CRIS_VARIANT_V32) 4180 fprintf (file, _(" [v32]")); 4181 4182 fputc ('\n', file); 4183 return TRUE; 4184 } 4185 4186 /* Don't mix files with and without a leading underscore. */ 4187 4188 static bfd_boolean 4189 cris_elf_merge_private_bfd_data (ibfd, obfd) 4190 bfd *ibfd; 4191 bfd *obfd; 4192 { 4193 int imach, omach; 4194 4195 if (! _bfd_generic_verify_endian_match (ibfd, obfd)) 4196 return FALSE; 4197 4198 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 4199 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 4200 return TRUE; 4201 4202 imach = bfd_get_mach (ibfd); 4203 4204 if (! elf_flags_init (obfd)) 4205 { 4206 /* This happens when ld starts out with a 'blank' output file. */ 4207 elf_flags_init (obfd) = TRUE; 4208 4209 /* We ignore the linker-set mach, and instead set it according to 4210 the first input file. This would also happen if we could 4211 somehow filter out the OUTPUT_ARCH () setting from elf.sc. 4212 This allows us to keep the same linker config across 4213 cris(v0..v10) and crisv32. The drawback is that we can't force 4214 the output type, which might be a sane thing to do for a 4215 v10+v32 compatibility object. */ 4216 if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach)) 4217 return FALSE; 4218 } 4219 4220 if (bfd_get_symbol_leading_char (ibfd) 4221 != bfd_get_symbol_leading_char (obfd)) 4222 { 4223 (*_bfd_error_handler) 4224 (bfd_get_symbol_leading_char (ibfd) == '_' 4225 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols") 4226 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"), 4227 ibfd); 4228 bfd_set_error (bfd_error_bad_value); 4229 return FALSE; 4230 } 4231 4232 omach = bfd_get_mach (obfd); 4233 4234 if (imach != omach) 4235 { 4236 /* We can get an incompatible combination only if either is 4237 bfd_mach_cris_v32, and the other one isn't compatible. */ 4238 if ((imach == bfd_mach_cris_v32 4239 && omach != bfd_mach_cris_v10_v32) 4240 || (omach == bfd_mach_cris_v32 4241 && imach != bfd_mach_cris_v10_v32)) 4242 { 4243 (*_bfd_error_handler) 4244 ((imach == bfd_mach_cris_v32) 4245 ? _("%B contains CRIS v32 code, incompatible" 4246 " with previous objects") 4247 : _("%B contains non-CRIS-v32 code, incompatible" 4248 " with previous objects"), 4249 ibfd); 4250 bfd_set_error (bfd_error_bad_value); 4251 return FALSE; 4252 } 4253 4254 /* We don't have to check the case where the input is compatible 4255 with v10 and v32, because the output is already known to be set 4256 to the other (compatible) mach. */ 4257 if (omach == bfd_mach_cris_v10_v32 4258 && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach)) 4259 return FALSE; 4260 } 4261 4262 return TRUE; 4263 } 4264 4265 /* Do side-effects of e_flags copying to obfd. */ 4266 4267 static bfd_boolean 4268 cris_elf_copy_private_bfd_data (ibfd, obfd) 4269 bfd *ibfd; 4270 bfd *obfd; 4271 { 4272 /* Call the base function. */ 4273 if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd)) 4274 return FALSE; 4275 4276 /* If output is big-endian for some obscure reason, stop here. */ 4277 if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE) 4278 return FALSE; 4279 4280 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 4281 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 4282 return TRUE; 4283 4284 /* Do what we really came here for. */ 4285 return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd)); 4286 } 4287 4288 static enum elf_reloc_type_class 4289 elf_cris_reloc_type_class (rela) 4290 const Elf_Internal_Rela *rela; 4291 { 4292 enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info); 4293 switch (r_type) 4294 { 4295 case R_CRIS_RELATIVE: 4296 return reloc_class_relative; 4297 case R_CRIS_JUMP_SLOT: 4298 return reloc_class_plt; 4299 case R_CRIS_COPY: 4300 return reloc_class_copy; 4301 default: 4302 return reloc_class_normal; 4303 } 4304 } 4305 4306 /* The elf_backend_got_elt_size worker. For one symbol, we can have up to 4307 two GOT entries from three types with two different sizes. We handle 4308 it as a single entry, so we can use the regular offset-calculation 4309 machinery. */ 4310 4311 static bfd_vma 4312 elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED, 4313 struct bfd_link_info *info ATTRIBUTE_UNUSED, 4314 struct elf_link_hash_entry *hr, 4315 bfd *ibfd, 4316 unsigned long symndx) 4317 { 4318 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr; 4319 bfd_vma eltsiz = 0; 4320 4321 /* We may have one regular GOT entry or up to two TLS GOT 4322 entries. */ 4323 if (h == NULL) 4324 { 4325 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 4326 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd); 4327 4328 BFD_ASSERT (local_got_refcounts != NULL); 4329 4330 if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0) 4331 { 4332 /* We can't have a variable referred to both as a regular 4333 variable and through TLS relocs. */ 4334 BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0 4335 && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0); 4336 return 4; 4337 } 4338 4339 if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0) 4340 eltsiz += 8; 4341 4342 if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0) 4343 eltsiz += 4; 4344 } 4345 else 4346 { 4347 struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h); 4348 if (hh->reg_got_refcount > 0) 4349 { 4350 /* The actual error-on-input is emitted elsewhere. */ 4351 BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0); 4352 return 4; 4353 } 4354 4355 if (hh->dtp_refcount > 0) 4356 eltsiz += 8; 4357 4358 if (hh->tprel_refcount > 0) 4359 eltsiz += 4; 4360 } 4361 4362 /* We're only called when h->got.refcount is non-zero, so we must 4363 have a non-zero size. */ 4364 BFD_ASSERT (eltsiz != 0); 4365 return eltsiz; 4366 } 4367 4368 #define ELF_ARCH bfd_arch_cris 4370 #define ELF_TARGET_ID CRIS_ELF_DATA 4371 #define ELF_MACHINE_CODE EM_CRIS 4372 #define ELF_MAXPAGESIZE 0x2000 4373 4374 #define TARGET_LITTLE_SYM bfd_elf32_cris_vec 4375 #define TARGET_LITTLE_NAME "elf32-cris" 4376 #define elf_symbol_leading_char 0 4377 4378 #define elf_info_to_howto_rel NULL 4379 #define elf_info_to_howto cris_info_to_howto_rela 4380 #define elf_backend_relocate_section cris_elf_relocate_section 4381 #define elf_backend_gc_mark_hook cris_elf_gc_mark_hook 4382 #define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook 4383 #define elf_backend_plt_sym_val cris_elf_plt_sym_val 4384 #define elf_backend_check_relocs cris_elf_check_relocs 4385 #define elf_backend_grok_prstatus cris_elf_grok_prstatus 4386 #define elf_backend_grok_psinfo cris_elf_grok_psinfo 4387 4388 #define elf_backend_can_gc_sections 1 4389 #define elf_backend_can_refcount 1 4390 4391 #define elf_backend_object_p cris_elf_object_p 4392 #define elf_backend_final_write_processing \ 4393 cris_elf_final_write_processing 4394 #define bfd_elf32_bfd_print_private_bfd_data \ 4395 cris_elf_print_private_bfd_data 4396 #define bfd_elf32_bfd_merge_private_bfd_data \ 4397 cris_elf_merge_private_bfd_data 4398 #define bfd_elf32_bfd_copy_private_bfd_data \ 4399 cris_elf_copy_private_bfd_data 4400 4401 #define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup 4402 #define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup 4403 4404 #define bfd_elf32_bfd_link_hash_table_create \ 4405 elf_cris_link_hash_table_create 4406 #define elf_backend_adjust_dynamic_symbol \ 4407 elf_cris_adjust_dynamic_symbol 4408 #define elf_backend_copy_indirect_symbol \ 4409 elf_cris_copy_indirect_symbol 4410 #define elf_backend_size_dynamic_sections \ 4411 elf_cris_size_dynamic_sections 4412 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 4413 #define elf_backend_finish_dynamic_symbol \ 4414 elf_cris_finish_dynamic_symbol 4415 #define elf_backend_finish_dynamic_sections \ 4416 elf_cris_finish_dynamic_sections 4417 #define elf_backend_create_dynamic_sections \ 4418 _bfd_elf_create_dynamic_sections 4419 #define bfd_elf32_bfd_final_link \ 4420 bfd_elf_gc_common_final_link 4421 #define elf_backend_hide_symbol elf_cris_hide_symbol 4422 #define elf_backend_reloc_type_class elf_cris_reloc_type_class 4423 4424 #define elf_backend_want_got_plt 1 4425 #define elf_backend_plt_readonly 1 4426 #define elf_backend_want_plt_sym 0 4427 #define elf_backend_got_header_size 12 4428 #define elf_backend_got_elt_size elf_cris_got_elt_size 4429 4430 /* Later, we my want to optimize RELA entries into REL entries for dynamic 4431 linking and libraries (if it's a win of any significance). Until then, 4432 take the easy route. */ 4433 #define elf_backend_may_use_rel_p 0 4434 #define elf_backend_may_use_rela_p 1 4435 #define elf_backend_rela_normal 1 4436 4437 #include "elf32-target.h" 4438 4439 #undef TARGET_LITTLE_SYM 4440 #undef TARGET_LITTLE_NAME 4441 #undef elf_symbol_leading_char 4442 4443 #define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec 4444 #define TARGET_LITTLE_NAME "elf32-us-cris" 4445 #define elf_symbol_leading_char '_' 4446 #undef elf32_bed 4447 #define elf32_bed elf32_us_cris_bed 4448 4449 #include "elf32-target.h" 4450
Indexes created Sat Sep 12 00:25:55 UTC 2026