1/* IQ2000-specific support for 32-bit ELF. 2 Copyright (C) 2003-2024 Free Software Foundation, Inc. 3 4 This file is part of BFD, the Binary File Descriptor library. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 19 20#include "sysdep.h" 21#include "bfd.h" 22#include "libbfd.h" 23#include "elf-bfd.h" 24#include "elf/iq2000.h" 25#include "libiberty.h" 26 27/* Forward declarations. */ 28 29static bfd_reloc_status_type iq2000_elf_howto_hi16_reloc (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 30 31 32static reloc_howto_type iq2000_elf_howto_table [] = 33{ 34 /* This reloc does nothing. */ 35 36 HOWTO (R_IQ2000_NONE, /* type */ 37 0, /* rightshift */ 38 0, /* size */ 39 0, /* bitsize */ 40 false, /* pc_relative */ 41 0, /* bitpos */ 42 complain_overflow_dont, /* complain_on_overflow */ 43 bfd_elf_generic_reloc, /* special_function */ 44 "R_IQ2000_NONE", /* name */ 45 false, /* partial_inplace */ 46 0, /* src_mask */ 47 0, /* dst_mask */ 48 false), /* pcrel_offset */ 49 50 /* A 16 bit absolute relocation. */ 51 HOWTO (R_IQ2000_16, /* type */ 52 0, /* rightshift */ 53 2, /* size */ 54 16, /* bitsize */ 55 false, /* pc_relative */ 56 0, /* bitpos */ 57 complain_overflow_bitfield, /* complain_on_overflow */ 58 bfd_elf_generic_reloc, /* special_function */ 59 "R_IQ2000_16", /* name */ 60 false, /* partial_inplace */ 61 0x0000, /* src_mask */ 62 0xffff, /* dst_mask */ 63 false), /* pcrel_offset */ 64 65 /* A 32 bit absolute relocation. */ 66 HOWTO (R_IQ2000_32, /* type */ 67 0, /* rightshift */ 68 4, /* size */ 69 31, /* bitsize */ 70 false, /* pc_relative */ 71 0, /* bitpos */ 72 complain_overflow_bitfield, /* complain_on_overflow */ 73 bfd_elf_generic_reloc, /* special_function */ 74 "R_IQ2000_32", /* name */ 75 false, /* partial_inplace */ 76 0x00000000, /* src_mask */ 77 0x7fffffff, /* dst_mask */ 78 false), /* pcrel_offset */ 79 80 /* 26 bit branch address. */ 81 HOWTO (R_IQ2000_26, /* type */ 82 2, /* rightshift */ 83 4, /* size */ 84 26, /* bitsize */ 85 false, /* pc_relative */ 86 0, /* bitpos */ 87 complain_overflow_dont, /* complain_on_overflow */ 88 /* This needs complex overflow 89 detection, because the upper four 90 bits must match the PC. */ 91 bfd_elf_generic_reloc, /* special_function */ 92 "R_IQ2000_26", /* name */ 93 false, /* partial_inplace */ 94 0x00000000, /* src_mask */ 95 0x03ffffff, /* dst_mask */ 96 false), /* pcrel_offset */ 97 98 /* 16 bit PC relative reference. */ 99 HOWTO (R_IQ2000_PC16, /* type */ 100 2, /* rightshift */ 101 4, /* size */ 102 16, /* bitsize */ 103 true, /* pc_relative */ 104 0, /* bitpos */ 105 complain_overflow_signed, /* complain_on_overflow */ 106 bfd_elf_generic_reloc, /* special_function */ 107 "R_IQ2000_PC16", /* name */ 108 false, /* partial_inplace */ 109 0x0000, /* src_mask */ 110 0xffff, /* dst_mask */ 111 true), /* pcrel_offset */ 112 113 /* high 16 bits of symbol value. */ 114 HOWTO (R_IQ2000_HI16, /* type */ 115 16, /* rightshift */ 116 4, /* size */ 117 15, /* bitsize */ 118 false, /* pc_relative */ 119 0, /* bitpos */ 120 complain_overflow_dont, /* complain_on_overflow */ 121 iq2000_elf_howto_hi16_reloc, /* special_function */ 122 "R_IQ2000_HI16", /* name */ 123 false, /* partial_inplace */ 124 0x0000, /* src_mask */ 125 0x7fff, /* dst_mask */ 126 false), /* pcrel_offset */ 127 128 /* Low 16 bits of symbol value. */ 129 HOWTO (R_IQ2000_LO16, /* type */ 130 0, /* rightshift */ 131 4, /* size */ 132 16, /* bitsize */ 133 false, /* pc_relative */ 134 0, /* bitpos */ 135 complain_overflow_dont, /* complain_on_overflow */ 136 bfd_elf_generic_reloc, /* special_function */ 137 "R_IQ2000_LO16", /* name */ 138 false, /* partial_inplace */ 139 0x0000, /* src_mask */ 140 0xffff, /* dst_mask */ 141 false), /* pcrel_offset */ 142 143 /* 16-bit jump offset. */ 144 HOWTO (R_IQ2000_OFFSET_16, /* type */ 145 2, /* rightshift */ 146 4, /* size */ 147 16, /* bitsize */ 148 false, /* pc_relative */ 149 0, /* bitpos */ 150 complain_overflow_dont, /* complain_on_overflow */ 151 bfd_elf_generic_reloc, /* special_function */ 152 "R_IQ2000_OFFSET_16", /* name */ 153 false, /* partial_inplace */ 154 0x0000, /* src_mask */ 155 0xffff, /* dst_mask */ 156 false), /* pcrel_offset */ 157 158 /* 21-bit jump offset. */ 159 HOWTO (R_IQ2000_OFFSET_21, /* type */ 160 2, /* rightshift */ 161 4, /* size */ 162 21, /* bitsize */ 163 false, /* pc_relative */ 164 0, /* bitpos */ 165 complain_overflow_dont, /* complain_on_overflow */ 166 bfd_elf_generic_reloc, /* special_function */ 167 "R_IQ2000_OFFSET_21", /* name */ 168 false, /* partial_inplace */ 169 0x000000, /* src_mask */ 170 0x1fffff, /* dst_mask */ 171 false), /* pcrel_offset */ 172 173 /* unsigned high 16 bits of value. */ 174 HOWTO (R_IQ2000_OFFSET_21, /* type */ 175 16, /* rightshift */ 176 4, /* size */ 177 16, /* bitsize */ 178 false, /* pc_relative */ 179 0, /* bitpos */ 180 complain_overflow_dont, /* complain_on_overflow */ 181 bfd_elf_generic_reloc, /* special_function */ 182 "R_IQ2000_UHI16", /* name */ 183 false, /* partial_inplace */ 184 0x0000, /* src_mask */ 185 0x7fff, /* dst_mask */ 186 false), /* pcrel_offset */ 187 188 /* A 32 bit absolute debug relocation. */ 189 HOWTO (R_IQ2000_32_DEBUG, /* type */ 190 0, /* rightshift */ 191 4, /* size */ 192 32, /* bitsize */ 193 false, /* pc_relative */ 194 0, /* bitpos */ 195 complain_overflow_bitfield, /* complain_on_overflow */ 196 bfd_elf_generic_reloc, /* special_function */ 197 "R_IQ2000_32", /* name */ 198 false, /* partial_inplace */ 199 0x00000000, /* src_mask */ 200 0xffffffff, /* dst_mask */ 201 false), /* pcrel_offset */ 202 203}; 204 205/* GNU extension to record C++ vtable hierarchy. */ 206static reloc_howto_type iq2000_elf_vtinherit_howto = 207 HOWTO (R_IQ2000_GNU_VTINHERIT, /* type */ 208 0, /* rightshift */ 209 4, /* size */ 210 0, /* bitsize */ 211 false, /* pc_relative */ 212 0, /* bitpos */ 213 complain_overflow_dont, /* complain_on_overflow */ 214 NULL, /* special_function */ 215 "R_IQ2000_GNU_VTINHERIT", /* name */ 216 false, /* partial_inplace */ 217 0, /* src_mask */ 218 0, /* dst_mask */ 219 false); /* pcrel_offset */ 220 221/* GNU extension to record C++ vtable member usage. */ 222static reloc_howto_type iq2000_elf_vtentry_howto = 223 HOWTO (R_IQ2000_GNU_VTENTRY, /* type */ 224 0, /* rightshift */ 225 4, /* size */ 226 0, /* bitsize */ 227 false, /* pc_relative */ 228 0, /* bitpos */ 229 complain_overflow_dont, /* complain_on_overflow */ 230 NULL, /* special_function */ 231 "R_IQ2000_GNU_VTENTRY", /* name */ 232 false, /* partial_inplace */ 233 0, /* src_mask */ 234 0, /* dst_mask */ 235 false); /* pcrel_offset */ 236 237 238static bfd_reloc_status_type 239iq2000_elf_howto_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED, 240 arelent *reloc_entry, 241 asymbol *symbol, 242 void * data, 243 asection *input_section, 244 bfd *output_bfd, 245 char **error_message ATTRIBUTE_UNUSED) 246{ 247 bfd_reloc_status_type ret; 248 bfd_vma relocation; 249 250 /* If we're relocating and this an external symbol, 251 we don't want to change anything. */ 252 if (output_bfd != (bfd *) NULL 253 && (symbol->flags & BSF_SECTION_SYM) == 0 254 && reloc_entry->addend == 0) 255 { 256 reloc_entry->address += input_section->output_offset; 257 return bfd_reloc_ok; 258 } 259 260 if (bfd_is_com_section (symbol->section)) 261 relocation = 0; 262 else 263 relocation = symbol->value; 264 265 relocation += symbol->section->output_section->vma; 266 relocation += symbol->section->output_offset; 267 relocation += reloc_entry->addend; 268 269 /* If %lo will have sign-extension, compensate by add 0x10000 to hi portion. */ 270 if (relocation & 0x8000) 271 reloc_entry->addend += 0x10000; 272 273 /* Now do the reloc in the usual way. */ 274 ret = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 275 input_section, output_bfd, error_message); 276 277 /* Put it back the way it was. */ 278 if (relocation & 0x8000) 279 reloc_entry->addend -= 0x10000; 280 281 return ret; 282} 283 284static bfd_reloc_status_type 285iq2000_elf_relocate_hi16 (bfd *input_bfd, 286 Elf_Internal_Rela *relhi, 287 bfd_byte *contents, 288 bfd_vma value) 289{ 290 bfd_vma insn; 291 292 insn = bfd_get_32 (input_bfd, contents + relhi->r_offset); 293 294 value += relhi->r_addend; 295 value &= 0x7fffffff; /* Mask off top-bit which is Harvard mask bit. */ 296 297 /* If top-bit of %lo value is on, this means that %lo will 298 sign-propagate and so we compensate by adding 1 to %hi value. */ 299 if (value & 0x8000) 300 value += 0x10000; 301 302 value >>= 16; 303 insn = ((insn & ~0xFFFF) | value); 304 305 bfd_put_32 (input_bfd, insn, contents + relhi->r_offset); 306 return bfd_reloc_ok; 307} 308 309static bfd_reloc_status_type 310iq2000_elf_relocate_offset16 (bfd *input_bfd, 311 Elf_Internal_Rela *rel, 312 bfd_byte *contents, 313 bfd_vma value, 314 bfd_vma location) 315{ 316 bfd_vma insn; 317 bfd_vma jtarget; 318 319 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 320 321 value += rel->r_addend; 322 323 if (value & 3) 324 return bfd_reloc_dangerous; 325 326 jtarget = (value & 0x3fffc) | (location & 0xf0000000L); 327 328 if (jtarget != value) 329 return bfd_reloc_overflow; 330 331 insn = (insn & ~0xFFFF) | ((value >> 2) & 0xFFFF); 332 333 bfd_put_32 (input_bfd, insn, contents + rel->r_offset); 334 return bfd_reloc_ok; 335} 336 337/* Map BFD reloc types to IQ2000 ELF reloc types. */ 338 339static reloc_howto_type * 340iq2000_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 341 bfd_reloc_code_real_type code) 342{ 343 /* Note that the iq2000_elf_howto_table is indxed by the R_ 344 constants. Thus, the order that the howto records appear in the 345 table *must* match the order of the relocation types defined in 346 include/elf/iq2000.h. */ 347 348 switch (code) 349 { 350 case BFD_RELOC_NONE: 351 return &iq2000_elf_howto_table[ (int) R_IQ2000_NONE]; 352 case BFD_RELOC_16: 353 return &iq2000_elf_howto_table[ (int) R_IQ2000_16]; 354 case BFD_RELOC_32: 355 return &iq2000_elf_howto_table[ (int) R_IQ2000_32]; 356 case BFD_RELOC_MIPS_JMP: 357 return &iq2000_elf_howto_table[ (int) R_IQ2000_26]; 358 case BFD_RELOC_IQ2000_OFFSET_16: 359 return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_16]; 360 case BFD_RELOC_IQ2000_OFFSET_21: 361 return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_21]; 362 case BFD_RELOC_16_PCREL_S2: 363 return &iq2000_elf_howto_table[ (int) R_IQ2000_PC16]; 364 case BFD_RELOC_HI16: 365 return &iq2000_elf_howto_table[ (int) R_IQ2000_HI16]; 366 case BFD_RELOC_IQ2000_UHI16: 367 return &iq2000_elf_howto_table[ (int) R_IQ2000_UHI16]; 368 case BFD_RELOC_LO16: 369 return &iq2000_elf_howto_table[ (int) R_IQ2000_LO16]; 370 case BFD_RELOC_VTABLE_INHERIT: 371 return &iq2000_elf_vtinherit_howto; 372 case BFD_RELOC_VTABLE_ENTRY: 373 return &iq2000_elf_vtentry_howto; 374 default: 375 /* Pacify gcc -Wall. */ 376 return NULL; 377 } 378 return NULL; 379} 380 381static reloc_howto_type * 382iq2000_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) 383{ 384 unsigned int i; 385 386 for (i = 0; 387 i < (sizeof (iq2000_elf_howto_table) 388 / sizeof (iq2000_elf_howto_table[0])); 389 i++) 390 if (iq2000_elf_howto_table[i].name != NULL 391 && strcasecmp (iq2000_elf_howto_table[i].name, r_name) == 0) 392 return &iq2000_elf_howto_table[i]; 393 394 if (strcasecmp (iq2000_elf_vtinherit_howto.name, r_name) == 0) 395 return &iq2000_elf_vtinherit_howto; 396 if (strcasecmp (iq2000_elf_vtentry_howto.name, r_name) == 0) 397 return &iq2000_elf_vtentry_howto; 398 399 return NULL; 400} 401 402/* Perform a single relocation. By default we use the standard BFD 403 routines. */ 404 405static bfd_reloc_status_type 406iq2000_final_link_relocate (reloc_howto_type * howto, 407 bfd * input_bfd, 408 asection * input_section, 409 bfd_byte * contents, 410 Elf_Internal_Rela * rel, 411 bfd_vma relocation) 412{ 413 return _bfd_final_link_relocate (howto, input_bfd, input_section, 414 contents, rel->r_offset, 415 relocation, rel->r_addend); 416} 417 418/* Set the howto pointer for a IQ2000 ELF reloc. */ 419 420static bool 421iq2000_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED, 422 arelent * cache_ptr, 423 Elf_Internal_Rela * dst) 424{ 425 unsigned int r_type; 426 427 r_type = ELF32_R_TYPE (dst->r_info); 428 switch (r_type) 429 { 430 case R_IQ2000_GNU_VTINHERIT: 431 cache_ptr->howto = & iq2000_elf_vtinherit_howto; 432 break; 433 434 case R_IQ2000_GNU_VTENTRY: 435 cache_ptr->howto = & iq2000_elf_vtentry_howto; 436 break; 437 438 default: 439 if (r_type >= ARRAY_SIZE (iq2000_elf_howto_table)) 440 { 441 /* xgettext:c-format */ 442 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 443 abfd, r_type); 444 bfd_set_error (bfd_error_bad_value); 445 return false; 446 } 447 cache_ptr->howto = & iq2000_elf_howto_table [r_type]; 448 break; 449 } 450 return true; 451} 452 453/* Look through the relocs for a section during the first phase. 454 Since we don't do .gots or .plts, we just need to consider the 455 virtual table relocs for gc. */ 456 457static bool 458iq2000_elf_check_relocs (bfd *abfd, 459 struct bfd_link_info *info, 460 asection *sec, 461 const Elf_Internal_Rela *relocs) 462{ 463 Elf_Internal_Shdr *symtab_hdr; 464 struct elf_link_hash_entry **sym_hashes; 465 const Elf_Internal_Rela *rel; 466 const Elf_Internal_Rela *rel_end; 467 bool changed = false; 468 469 if (bfd_link_relocatable (info)) 470 return true; 471 472 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 473 sym_hashes = elf_sym_hashes (abfd); 474 475 rel_end = relocs + sec->reloc_count; 476 for (rel = relocs; rel < rel_end; rel++) 477 { 478 struct elf_link_hash_entry *h; 479 unsigned long r_symndx; 480 481 r_symndx = ELF32_R_SYM (rel->r_info); 482 if (r_symndx < symtab_hdr->sh_info) 483 h = NULL; 484 else 485 { 486 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 487 while (h->root.type == bfd_link_hash_indirect 488 || h->root.type == bfd_link_hash_warning) 489 h = (struct elf_link_hash_entry *) h->root.u.i.link; 490 } 491 492 switch (ELF32_R_TYPE (rel->r_info)) 493 { 494 /* This relocation describes the C++ object vtable 495 hierarchy. Reconstruct it for later use during GC. */ 496 case R_IQ2000_GNU_VTINHERIT: 497 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 498 return false; 499 break; 500 501 /* This relocation describes which C++ vtable entries 502 are actually used. Record for later use during GC. */ 503 case R_IQ2000_GNU_VTENTRY: 504 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 505 return false; 506 break; 507 508 case R_IQ2000_32: 509 /* For debug section, change to special harvard-aware relocations. */ 510 if (startswith (sec->name, ".debug") 511 || startswith (sec->name, ".stab") 512 || startswith (sec->name, ".eh_frame")) 513 { 514 ((Elf_Internal_Rela *) rel)->r_info 515 = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG); 516 changed = true; 517 } 518 break; 519 } 520 } 521 522 if (changed) 523 /* Note that we've changed relocs, otherwise if !info->keep_memory 524 we'll free the relocs and lose our changes. */ 525 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs; 526 527 return true; 528} 529 530 531/* Relocate a IQ2000 ELF section. 532 There is some attempt to make this function usable for many architectures, 533 both USE_REL and USE_RELA ['twould be nice if such a critter existed], 534 if only to serve as a learning tool. 535 536 The RELOCATE_SECTION function is called by the new ELF backend linker 537 to handle the relocations for a section. 538 539 The relocs are always passed as Rela structures; if the section 540 actually uses Rel structures, the r_addend field will always be 541 zero. 542 543 This function is responsible for adjusting the section contents as 544 necessary, and (if using Rela relocs and generating a relocatable 545 output file) adjusting the reloc addend as necessary. 546 547 This function does not have to worry about setting the reloc 548 address or the reloc symbol index. 549 550 LOCAL_SYMS is a pointer to the swapped in local symbols. 551 552 LOCAL_SECTIONS is an array giving the section in the input file 553 corresponding to the st_shndx field of each local symbol. 554 555 The global hash table entry for the global symbols can be found 556 via elf_sym_hashes (input_bfd). 557 558 When generating relocatable output, this function must handle 559 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 560 going to be the section symbol corresponding to the output 561 section, which means that the addend must be adjusted 562 accordingly. */ 563 564static int 565iq2000_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED, 566 struct bfd_link_info * info, 567 bfd * input_bfd, 568 asection * input_section, 569 bfd_byte * contents, 570 Elf_Internal_Rela * relocs, 571 Elf_Internal_Sym * local_syms, 572 asection ** local_sections) 573{ 574 Elf_Internal_Shdr * symtab_hdr; 575 struct elf_link_hash_entry ** sym_hashes; 576 Elf_Internal_Rela * rel; 577 Elf_Internal_Rela * relend; 578 579 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; 580 sym_hashes = elf_sym_hashes (input_bfd); 581 relend = relocs + input_section->reloc_count; 582 583 for (rel = relocs; rel < relend; rel ++) 584 { 585 reloc_howto_type * howto; 586 unsigned long r_symndx; 587 Elf_Internal_Sym * sym; 588 asection * sec; 589 struct elf_link_hash_entry * h; 590 bfd_vma relocation; 591 bfd_reloc_status_type r; 592 const char * name = NULL; 593 int r_type; 594 595 r_type = ELF32_R_TYPE (rel->r_info); 596 597 if ( r_type == R_IQ2000_GNU_VTINHERIT 598 || r_type == R_IQ2000_GNU_VTENTRY) 599 continue; 600 601 r_symndx = ELF32_R_SYM (rel->r_info); 602 603 howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info); 604 h = NULL; 605 sym = NULL; 606 sec = NULL; 607 608 if (r_symndx < symtab_hdr->sh_info) 609 { 610 asection *osec; 611 612 sym = local_syms + r_symndx; 613 osec = sec = local_sections [r_symndx]; 614 if ((sec->flags & SEC_MERGE) 615 && ELF_ST_TYPE (sym->st_info) == STT_SECTION) 616 /* This relocation is relative to a section symbol that is 617 going to be merged. Change it so that it is relative 618 to the merged section symbol. */ 619 rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, &sec, 620 rel->r_addend); 621 622 relocation = (sec->output_section->vma 623 + sec->output_offset 624 + sym->st_value); 625 626 name = bfd_elf_string_from_elf_section 627 (input_bfd, symtab_hdr->sh_link, sym->st_name); 628 name = name == NULL ? bfd_section_name (osec) : name; 629 } 630 else 631 { 632 bool unresolved_reloc; 633 bool warned, ignored; 634 635 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 636 r_symndx, symtab_hdr, sym_hashes, 637 h, sec, relocation, 638 unresolved_reloc, warned, ignored); 639 640 name = h->root.root.string; 641 } 642 643 if (sec != NULL && discarded_section (sec)) 644 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 645 rel, 1, relend, howto, 0, contents); 646 647 if (bfd_link_relocatable (info)) 648 continue; 649 650 switch (r_type) 651 { 652 case R_IQ2000_HI16: 653 r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation); 654 break; 655 656 case R_IQ2000_OFFSET_16: 657 r = iq2000_elf_relocate_offset16 (input_bfd, rel, contents, relocation, 658 input_section->output_section->vma 659 + input_section->output_offset 660 + rel->r_offset); 661 break; 662 663 case R_IQ2000_PC16: 664 rel->r_addend -= 4; 665 /* Fall through. */ 666 667 default: 668 r = iq2000_final_link_relocate (howto, input_bfd, input_section, 669 contents, rel, relocation); 670 break; 671 } 672 673 if (r != bfd_reloc_ok) 674 { 675 const char * msg = (const char *) NULL; 676 677 switch (r) 678 { 679 case bfd_reloc_overflow: 680 (*info->callbacks->reloc_overflow) 681 (info, (h ? &h->root : NULL), name, howto->name, 682 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 683 break; 684 685 case bfd_reloc_undefined: 686 (*info->callbacks->undefined_symbol) 687 (info, name, input_bfd, input_section, rel->r_offset, true); 688 break; 689 690 case bfd_reloc_outofrange: 691 msg = _("internal error: out of range error"); 692 break; 693 694 case bfd_reloc_notsupported: 695 msg = _("internal error: unsupported relocation error"); 696 break; 697 698 case bfd_reloc_dangerous: 699 msg = _("internal error: dangerous relocation"); 700 break; 701 702 default: 703 msg = _("internal error: unknown error"); 704 break; 705 } 706 707 if (msg) 708 (*info->callbacks->warning) (info, msg, name, input_bfd, 709 input_section, rel->r_offset); 710 } 711 } 712 713 return true; 714} 715 716 717/* Return the section that should be marked against GC for a given 718 relocation. */ 719 720static asection * 721iq2000_elf_gc_mark_hook (asection *sec, 722 struct bfd_link_info *info, 723 Elf_Internal_Rela *rel, 724 struct elf_link_hash_entry *h, 725 Elf_Internal_Sym *sym) 726{ 727 if (h != NULL) 728 switch (ELF32_R_TYPE (rel->r_info)) 729 { 730 case R_IQ2000_GNU_VTINHERIT: 731 case R_IQ2000_GNU_VTENTRY: 732 return NULL; 733 } 734 735 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 736} 737 738 739/* Return the MACH for an e_flags value. */ 740 741static int 742elf32_iq2000_machine (bfd *abfd) 743{ 744 switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK) 745 { 746 case EF_IQ2000_CPU_IQ10: 747 return bfd_mach_iq10; 748 749 case EF_IQ2000_CPU_IQ2000: 750 default: 751 return bfd_mach_iq2000; 752 } 753} 754 755 756/* Function to set the ELF flag bits. */ 757 758static bool 759iq2000_elf_set_private_flags (bfd *abfd, flagword flags) 760{ 761 elf_elfheader (abfd)->e_flags = flags; 762 elf_flags_init (abfd) = true; 763 return true; 764} 765 766/* Merge backend specific data from an object 767 file to the output object file when linking. */ 768 769static bool 770iq2000_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 771{ 772 bfd *obfd = info->output_bfd; 773 flagword old_flags, old_partial; 774 flagword new_flags, new_partial; 775 bool error = false; 776 char new_opt[80]; 777 char old_opt[80]; 778 779 new_opt[0] = old_opt[0] = '\0'; 780 new_flags = elf_elfheader (ibfd)->e_flags; 781 old_flags = elf_elfheader (obfd)->e_flags; 782 783 if (!elf_flags_init (obfd)) 784 { 785 /* First call, no flags set. */ 786 elf_flags_init (obfd) = true; 787 elf_elfheader (obfd)->e_flags = new_flags; 788 } 789 790 else if (new_flags != old_flags) 791 { 792 /* Warn if different cpu is used, but allow a 793 specific cpu to override the generic cpu. */ 794 new_partial = (new_flags & EF_IQ2000_CPU_MASK); 795 old_partial = (old_flags & EF_IQ2000_CPU_MASK); 796 797 if (new_partial != old_partial) 798 { 799 switch (new_partial) 800 { 801 case EF_IQ2000_CPU_IQ10: 802 strcat (new_opt, " -m10"); 803 break; 804 805 default: 806 case EF_IQ2000_CPU_IQ2000: 807 strcat (new_opt, " -m2000"); 808 break; 809 } 810 811 switch (old_partial) 812 { 813 case EF_IQ2000_CPU_IQ10: 814 strcat (old_opt, " -m10"); 815 break; 816 817 default: 818 case EF_IQ2000_CPU_IQ2000: 819 strcat (old_opt, " -m2000"); 820 break; 821 } 822 } 823 824 /* Print out any mismatches from above. */ 825 if (new_opt[0]) 826 { 827 error = true; 828 _bfd_error_handler 829 /* xgettext:c-format */ 830 (_("%pB: compiled with %s and linked with modules compiled with %s"), 831 ibfd, new_opt, old_opt); 832 } 833 834 new_flags &= ~ EF_IQ2000_ALL_FLAGS; 835 old_flags &= ~ EF_IQ2000_ALL_FLAGS; 836 837 /* Warn about any other mismatches. */ 838 if (new_flags != old_flags) 839 { 840 error = true; 841 842 _bfd_error_handler 843 /* xgettext:c-format */ 844 (_("%pB: uses different e_flags (%#x) fields than previous modules (%#x)"), 845 ibfd, new_flags, old_flags); 846 } 847 } 848 849 if (error) 850 bfd_set_error (bfd_error_bad_value); 851 852 return !error; 853} 854 855 856static bool 857iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr) 858{ 859 FILE *file = (FILE *) ptr; 860 flagword flags; 861 862 BFD_ASSERT (abfd != NULL && ptr != NULL); 863 864 /* Print normal ELF private data. */ 865 _bfd_elf_print_private_bfd_data (abfd, ptr); 866 867 flags = elf_elfheader (abfd)->e_flags; 868 fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags); 869 870 switch (flags & EF_IQ2000_CPU_MASK) 871 { 872 case EF_IQ2000_CPU_IQ10: 873 fprintf (file, " -m10"); 874 break; 875 case EF_IQ2000_CPU_IQ2000: 876 fprintf (file, " -m2000"); 877 break; 878 default: 879 break; 880 } 881 882 fputc ('\n', file); 883 return true; 884} 885 886static 887bool 888iq2000_elf_object_p (bfd *abfd) 889{ 890 bfd_default_set_arch_mach (abfd, bfd_arch_iq2000, 891 elf32_iq2000_machine (abfd)); 892 return true; 893} 894 895 896#define ELF_ARCH bfd_arch_iq2000 897#define ELF_MACHINE_CODE EM_IQ2000 898#define ELF_MAXPAGESIZE 0x1000 899 900#define TARGET_BIG_SYM iq2000_elf32_vec 901#define TARGET_BIG_NAME "elf32-iq2000" 902 903#define elf_info_to_howto_rel NULL 904#define elf_info_to_howto iq2000_info_to_howto_rela 905#define elf_backend_relocate_section iq2000_elf_relocate_section 906#define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook 907#define elf_backend_check_relocs iq2000_elf_check_relocs 908#define elf_backend_object_p iq2000_elf_object_p 909#define elf_backend_rela_normal 1 910 911#define elf_backend_can_gc_sections 1 912 913#define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup 914#define bfd_elf32_bfd_reloc_name_lookup iq2000_reloc_name_lookup 915#define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags 916#define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data 917#define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data 918 919#include "elf32-target.h" 920