1 /* M32R-specific support for 32-bit ELF. 2 Copyright (C) 1996-2022 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, 19 MA 02110-1301, USA. */ 20 21 #include "sysdep.h" 22 #include "bfd.h" 23 #include "libbfd.h" 24 #include "elf-bfd.h" 25 #include "elf/m32r.h" 26 27 #define NOP_INSN 0x7000 28 #define MAKE_PARALLEL(insn) ((insn) | 0x8000) 29 30 /* Use REL instead of RELA to save space. 31 This only saves space in libraries and object files, but perhaps 32 relocs will be put in ROM? All in all though, REL relocs are a pain 33 to work with. */ 34 /* #define USE_REL 1 35 36 #ifndef USE_REL 37 #define USE_REL 0 38 #endif */ 39 /* Use RELA. But use REL to link old objects for backwords compatibility. */ 40 41 /* Functions for the M32R ELF linker. */ 42 43 /* The name of the dynamic interpreter. This is put in the .interp 44 section. */ 45 46 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" 47 48 /* The nop opcode we use. */ 49 50 #define M32R_NOP 0x7000f000 51 52 #define PLT_EMPTY 0x10101010 /* RIE -> RIE */ 53 54 /* The size in bytes of an entry in the procedure linkage table. */ 55 56 #define PLT_ENTRY_SIZE 20 57 #define PLT_HEADER_SIZE 20 58 59 /* The first one entries in a procedure linkage table are reserved, 60 and the initial contents are unimportant (we zero them out). 61 Subsequent entries look like this. */ 62 63 #define PLT0_ENTRY_WORD0 0xd6c00000 /* seth r6, #high(.got+4) */ 64 #define PLT0_ENTRY_WORD1 0x86e60000 /* or3 r6, r6, #low(.got)+4) */ 65 #define PLT0_ENTRY_WORD2 0x24e626c6 /* ld r4, @r6+ -> ld r6, @r6 */ 66 #define PLT0_ENTRY_WORD3 0x1fc6f000 /* jmp r6 || pnop */ 67 #define PLT0_ENTRY_WORD4 PLT_EMPTY /* RIE -> RIE */ 68 69 #define PLT0_PIC_ENTRY_WORD0 0xa4cc0004 /* ld r4, @(4,r12) */ 70 #define PLT0_PIC_ENTRY_WORD1 0xa6cc0008 /* ld r6, @(8,r12) */ 71 #define PLT0_PIC_ENTRY_WORD2 0x1fc6f000 /* jmp r6 || nop */ 72 #define PLT0_PIC_ENTRY_WORD3 PLT_EMPTY /* RIE -> RIE */ 73 #define PLT0_PIC_ENTRY_WORD4 PLT_EMPTY /* RIE -> RIE */ 74 75 #define PLT_ENTRY_WORD0 0xe6000000 /* ld24 r6, .name_in_GOT */ 76 #define PLT_ENTRY_WORD1 0x06acf000 /* add r6, r12 || nop */ 77 #define PLT_ENTRY_WORD0b 0xd6c00000 /* seth r6, #high(.name_in_GOT) */ 78 #define PLT_ENTRY_WORD1b 0x86e60000 /* or3 r6, r6, #low(.name_in_GOT) */ 79 #define PLT_ENTRY_WORD2 0x26c61fc6 /* ld r6, @r6 -> jmp r6 */ 80 #define PLT_ENTRY_WORD3 0xe5000000 /* ld24 r5, $offset */ 81 #define PLT_ENTRY_WORD4 0xff000000 /* bra .plt0. */ 82 83 84 /* Utility to actually perform an R_M32R_10_PCREL reloc. */ 85 86 static bfd_reloc_status_type 87 m32r_elf_do_10_pcrel_reloc (bfd *abfd, 88 reloc_howto_type *howto, 89 asection *input_section, 90 bfd_byte *data, 91 bfd_vma offset, 92 asection *symbol_section ATTRIBUTE_UNUSED, 93 bfd_vma symbol_value, 94 bfd_vma addend) 95 { 96 bfd_signed_vma relocation; 97 unsigned long x; 98 bfd_reloc_status_type status; 99 100 /* Sanity check the address (offset in section). */ 101 if (offset > bfd_get_section_limit (abfd, input_section)) 102 return bfd_reloc_outofrange; 103 104 relocation = symbol_value + addend; 105 /* Make it pc relative. */ 106 relocation -= (input_section->output_section->vma 107 + input_section->output_offset); 108 /* These jumps mask off the lower two bits of the current address 109 before doing pcrel calculations. */ 110 relocation -= (offset & -(bfd_vma) 4); 111 112 if (relocation < -0x200 || relocation > 0x1ff) 113 status = bfd_reloc_overflow; 114 else 115 status = bfd_reloc_ok; 116 117 x = bfd_get_16 (abfd, data + offset); 118 relocation >>= howto->rightshift; 119 relocation <<= howto->bitpos; 120 x = (x & ~howto->dst_mask) | (((x & howto->src_mask) + relocation) & howto->dst_mask); 121 bfd_put_16 (abfd, (bfd_vma) x, data + offset); 122 123 return status; 124 } 125 126 /* Handle the R_M32R_10_PCREL reloc. */ 127 128 static bfd_reloc_status_type 129 m32r_elf_10_pcrel_reloc (bfd * abfd, 130 arelent * reloc_entry, 131 asymbol * symbol, 132 void * data, 133 asection * input_section, 134 bfd * output_bfd, 135 char ** error_message ATTRIBUTE_UNUSED) 136 { 137 /* This part is from bfd_elf_generic_reloc. */ 138 if (output_bfd != NULL 139 && (symbol->flags & BSF_SECTION_SYM) == 0 140 && (! reloc_entry->howto->partial_inplace 141 || reloc_entry->addend == 0)) 142 { 143 reloc_entry->address += input_section->output_offset; 144 return bfd_reloc_ok; 145 } 146 147 if (output_bfd != NULL) 148 /* FIXME: See bfd_perform_relocation. Is this right? */ 149 return bfd_reloc_continue; 150 151 return m32r_elf_do_10_pcrel_reloc (abfd, reloc_entry->howto, 152 input_section, 153 data, reloc_entry->address, 154 symbol->section, 155 (symbol->value 156 + symbol->section->output_section->vma 157 + symbol->section->output_offset), 158 reloc_entry->addend); 159 } 160 161 /* Do generic partial_inplace relocation. 162 This is a local replacement for bfd_elf_generic_reloc. */ 163 164 static bfd_reloc_status_type 165 m32r_elf_generic_reloc (bfd *input_bfd, 166 arelent *reloc_entry, 167 asymbol *symbol, 168 void * data, 169 asection *input_section, 170 bfd *output_bfd, 171 char **error_message ATTRIBUTE_UNUSED) 172 { 173 bfd_reloc_status_type ret; 174 bfd_vma relocation; 175 bfd_byte *inplace_address; 176 177 /* This part is from bfd_elf_generic_reloc. 178 If we're relocating, and this an external symbol, we don't want 179 to change anything. */ 180 if (output_bfd != NULL 181 && (symbol->flags & BSF_SECTION_SYM) == 0 182 && reloc_entry->addend == 0) 183 { 184 reloc_entry->address += input_section->output_offset; 185 return bfd_reloc_ok; 186 } 187 188 /* Now do the reloc in the usual way. 189 ??? It would be nice to call bfd_elf_generic_reloc here, 190 but we have partial_inplace set. bfd_elf_generic_reloc will 191 pass the handling back to bfd_install_relocation which will install 192 a section relative addend which is wrong. */ 193 194 /* Sanity check the address (offset in section). */ 195 if (reloc_entry->address > bfd_get_section_limit (input_bfd, input_section)) 196 return bfd_reloc_outofrange; 197 198 ret = bfd_reloc_ok; 199 if (bfd_is_und_section (symbol->section) 200 && output_bfd == NULL) 201 ret = bfd_reloc_undefined; 202 203 if (bfd_is_com_section (symbol->section) 204 || output_bfd != NULL) 205 relocation = 0; 206 else 207 relocation = symbol->value; 208 209 /* Only do this for a final link. */ 210 if (output_bfd == NULL) 211 { 212 relocation += symbol->section->output_section->vma; 213 relocation += symbol->section->output_offset; 214 } 215 216 relocation += reloc_entry->addend; 217 inplace_address = (bfd_byte *) data + reloc_entry->address; 218 219 #define DOIT(x) \ 220 x = ( (x & ~reloc_entry->howto->dst_mask) | \ 221 (((x & reloc_entry->howto->src_mask) + relocation) & \ 222 reloc_entry->howto->dst_mask)) 223 224 switch (bfd_get_reloc_size (reloc_entry->howto)) 225 { 226 case 2: 227 { 228 short x = bfd_get_16 (input_bfd, inplace_address); 229 DOIT (x); 230 bfd_put_16 (input_bfd, (bfd_vma) x, inplace_address); 231 } 232 break; 233 case 4: 234 { 235 unsigned long x = bfd_get_32 (input_bfd, inplace_address); 236 DOIT (x); 237 bfd_put_32 (input_bfd, (bfd_vma)x , inplace_address); 238 } 239 break; 240 default: 241 BFD_ASSERT (0); 242 } 243 244 if (output_bfd != NULL) 245 reloc_entry->address += input_section->output_offset; 246 247 return ret; 248 } 249 250 /* Handle the R_M32R_SDA16 reloc. 251 This reloc is used to compute the address of objects in the small data area 252 and to perform loads and stores from that area. 253 The lower 16 bits are sign extended and added to the register specified 254 in the instruction, which is assumed to point to _SDA_BASE_. */ 255 256 static bfd_reloc_status_type 257 m32r_elf_sda16_reloc (bfd *abfd ATTRIBUTE_UNUSED, 258 arelent *reloc_entry, 259 asymbol *symbol, 260 void * data ATTRIBUTE_UNUSED, 261 asection *input_section, 262 bfd *output_bfd, 263 char **error_message ATTRIBUTE_UNUSED) 264 { 265 /* This part is from bfd_elf_generic_reloc. */ 266 if (output_bfd != NULL 267 && (symbol->flags & BSF_SECTION_SYM) == 0 268 && (! reloc_entry->howto->partial_inplace 269 || reloc_entry->addend == 0)) 270 { 271 reloc_entry->address += input_section->output_offset; 272 return bfd_reloc_ok; 273 } 274 275 if (output_bfd != NULL) 276 /* FIXME: See bfd_perform_relocation. Is this right? */ 277 return bfd_reloc_continue; 278 279 /* FIXME: not sure what to do here yet. But then again, the linker 280 may never call us. */ 281 abort (); 282 } 283 284 285 /* Handle the R_M32R_HI16_[SU]LO relocs. 286 HI16_SLO is for the add3 and load/store with displacement instructions. 287 HI16_ULO is for the or3 instruction. 288 For R_M32R_HI16_SLO, the lower 16 bits are sign extended when added to 289 the high 16 bytes so if the lower 16 bits are negative (bit 15 == 1) then 290 we must add one to the high 16 bytes (which will get subtracted off when 291 the low 16 bits are added). 292 These relocs have to be done in combination with an R_M32R_LO16 reloc 293 because there is a carry from the LO16 to the HI16. Here we just save 294 the information we need; we do the actual relocation when we see the LO16. 295 This code is copied from the elf32-mips.c. We also support an arbitrary 296 number of HI16 relocs to be associated with a single LO16 reloc. The 297 assembler sorts the relocs to ensure each HI16 immediately precedes its 298 LO16. However if there are multiple copies, the assembler may not find 299 the real LO16 so it picks the first one it finds. */ 300 301 struct m32r_hi16 302 { 303 struct m32r_hi16 *next; 304 bfd_byte *addr; 305 bfd_vma addend; 306 }; 307 308 /* FIXME: This should not be a static variable. */ 309 310 static struct m32r_hi16 *m32r_hi16_list; 311 312 static bfd_reloc_status_type 313 m32r_elf_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED, 314 arelent *reloc_entry, 315 asymbol *symbol, 316 void * data, 317 asection *input_section, 318 bfd *output_bfd, 319 char **error_message ATTRIBUTE_UNUSED) 320 { 321 bfd_reloc_status_type ret; 322 bfd_vma relocation; 323 struct m32r_hi16 *n; 324 325 /* This part is from bfd_elf_generic_reloc. 326 If we're relocating, and this an external symbol, we don't want 327 to change anything. */ 328 if (output_bfd != NULL 329 && (symbol->flags & BSF_SECTION_SYM) == 0 330 && reloc_entry->addend == 0) 331 { 332 reloc_entry->address += input_section->output_offset; 333 return bfd_reloc_ok; 334 } 335 336 /* Sanity check the address (offset in section). */ 337 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 338 return bfd_reloc_outofrange; 339 340 ret = bfd_reloc_ok; 341 if (bfd_is_und_section (symbol->section) 342 && output_bfd == NULL) 343 ret = bfd_reloc_undefined; 344 345 if (bfd_is_com_section (symbol->section)) 346 relocation = 0; 347 else 348 relocation = symbol->value; 349 350 relocation += symbol->section->output_section->vma; 351 relocation += symbol->section->output_offset; 352 relocation += reloc_entry->addend; 353 354 /* Save the information, and let LO16 do the actual relocation. */ 355 n = bfd_malloc ((bfd_size_type) sizeof *n); 356 if (n == NULL) 357 return bfd_reloc_outofrange; 358 n->addr = (bfd_byte *) data + reloc_entry->address; 359 n->addend = relocation; 360 n->next = m32r_hi16_list; 361 m32r_hi16_list = n; 362 363 if (output_bfd != NULL) 364 reloc_entry->address += input_section->output_offset; 365 366 return ret; 367 } 368 369 /* Handle an M32R ELF HI16 reloc. */ 370 371 static void 372 m32r_elf_relocate_hi16 (bfd *input_bfd, 373 int type, 374 Elf_Internal_Rela *relhi, 375 Elf_Internal_Rela *rello, 376 bfd_byte *contents, 377 bfd_vma addend) 378 { 379 unsigned long insn; 380 bfd_vma addlo; 381 382 insn = bfd_get_32 (input_bfd, contents + relhi->r_offset); 383 384 addlo = bfd_get_32 (input_bfd, contents + rello->r_offset); 385 if (type == R_M32R_HI16_SLO) 386 addlo = ((addlo & 0xffff) ^ 0x8000) - 0x8000; 387 else 388 addlo &= 0xffff; 389 390 addend += ((insn & 0xffff) << 16) + addlo; 391 392 /* Reaccount for sign extension of low part. */ 393 if (type == R_M32R_HI16_SLO 394 && (addend & 0x8000) != 0) 395 addend += 0x10000; 396 397 bfd_put_32 (input_bfd, 398 (insn & 0xffff0000) | ((addend >> 16) & 0xffff), 399 contents + relhi->r_offset); 400 } 401 402 /* Do an R_M32R_LO16 relocation. This is a straightforward 16 bit 403 inplace relocation; this function exists in order to do the 404 R_M32R_HI16_[SU]LO relocation described above. */ 405 406 static bfd_reloc_status_type 407 m32r_elf_lo16_reloc (bfd *input_bfd, 408 arelent *reloc_entry, 409 asymbol *symbol, 410 void * data, 411 asection *input_section, 412 bfd *output_bfd, 413 char **error_message) 414 { 415 /* This part is from bfd_elf_generic_reloc. 416 If we're relocating, and this an external symbol, we don't want 417 to change anything. */ 418 if (output_bfd != NULL 419 && (symbol->flags & BSF_SECTION_SYM) == 0 420 && reloc_entry->addend == 0) 421 { 422 reloc_entry->address += input_section->output_offset; 423 return bfd_reloc_ok; 424 } 425 426 if (m32r_hi16_list != NULL) 427 { 428 struct m32r_hi16 *l; 429 430 l = m32r_hi16_list; 431 while (l != NULL) 432 { 433 unsigned long insn; 434 unsigned long val; 435 unsigned long vallo; 436 struct m32r_hi16 *next; 437 438 /* Do the HI16 relocation. Note that we actually don't need 439 to know anything about the LO16 itself, except where to 440 find the low 16 bits of the addend needed by the LO16. */ 441 insn = bfd_get_32 (input_bfd, l->addr); 442 vallo = ((bfd_get_32 (input_bfd, (bfd_byte *) data + reloc_entry->address) 443 & 0xffff) ^ 0x8000) - 0x8000; 444 val = ((insn & 0xffff) << 16) + vallo; 445 val += l->addend; 446 447 /* Reaccount for sign extension of low part. */ 448 if ((val & 0x8000) != 0) 449 val += 0x10000; 450 451 insn = (insn &~ (bfd_vma) 0xffff) | ((val >> 16) & 0xffff); 452 bfd_put_32 (input_bfd, (bfd_vma) insn, l->addr); 453 454 next = l->next; 455 free (l); 456 l = next; 457 } 458 459 m32r_hi16_list = NULL; 460 } 461 462 /* Now do the LO16 reloc in the usual way. 463 ??? It would be nice to call bfd_elf_generic_reloc here, 464 but we have partial_inplace set. bfd_elf_generic_reloc will 465 pass the handling back to bfd_install_relocation which will install 466 a section relative addend which is wrong. */ 467 return m32r_elf_generic_reloc (input_bfd, reloc_entry, symbol, data, 468 input_section, output_bfd, error_message); 469 } 470 471 472 static reloc_howto_type m32r_elf_howto_table[] = 473 { 474 /* This reloc does nothing. */ 475 HOWTO (R_M32R_NONE, /* type */ 476 0, /* rightshift */ 477 0, /* size */ 478 0, /* bitsize */ 479 false, /* pc_relative */ 480 0, /* bitpos */ 481 complain_overflow_dont, /* complain_on_overflow */ 482 bfd_elf_generic_reloc, /* special_function */ 483 "R_M32R_NONE", /* name */ 484 false, /* partial_inplace */ 485 0, /* src_mask */ 486 0, /* dst_mask */ 487 false), /* pcrel_offset */ 488 489 /* A 16 bit absolute relocation. */ 490 HOWTO (R_M32R_16, /* type */ 491 0, /* rightshift */ 492 2, /* size */ 493 16, /* bitsize */ 494 false, /* pc_relative */ 495 0, /* bitpos */ 496 complain_overflow_bitfield, /* complain_on_overflow */ 497 m32r_elf_generic_reloc,/* special_function */ 498 "R_M32R_16", /* name */ 499 true, /* partial_inplace */ 500 0xffff, /* src_mask */ 501 0xffff, /* dst_mask */ 502 false), /* pcrel_offset */ 503 504 /* A 32 bit absolute relocation. */ 505 HOWTO (R_M32R_32, /* type */ 506 0, /* rightshift */ 507 4, /* size */ 508 32, /* bitsize */ 509 false, /* pc_relative */ 510 0, /* bitpos */ 511 complain_overflow_bitfield, /* complain_on_overflow */ 512 m32r_elf_generic_reloc,/* special_function */ 513 "R_M32R_32", /* name */ 514 true, /* partial_inplace */ 515 0xffffffff, /* src_mask */ 516 0xffffffff, /* dst_mask */ 517 false), /* pcrel_offset */ 518 519 /* A 24 bit address. */ 520 HOWTO (R_M32R_24, /* type */ 521 0, /* rightshift */ 522 4, /* size */ 523 24, /* bitsize */ 524 false, /* pc_relative */ 525 0, /* bitpos */ 526 complain_overflow_unsigned, /* complain_on_overflow */ 527 m32r_elf_generic_reloc,/* special_function */ 528 "R_M32R_24", /* name */ 529 true, /* partial_inplace */ 530 0xffffff, /* src_mask */ 531 0xffffff, /* dst_mask */ 532 false), /* pcrel_offset */ 533 534 /* An PC Relative 10-bit relocation, shifted by 2. 535 This reloc is complicated because relocations are relative to pc & -4. 536 i.e. branches in the right insn slot use the address of the left insn 537 slot for pc. */ 538 /* ??? It's not clear whether this should have partial_inplace set or not. 539 Branch relaxing in the assembler can store the addend in the insn, 540 and if bfd_install_relocation gets called the addend may get added 541 again. */ 542 HOWTO (R_M32R_10_PCREL, /* type */ 543 2, /* rightshift */ 544 2, /* size */ 545 10, /* bitsize */ 546 true, /* pc_relative */ 547 0, /* bitpos */ 548 complain_overflow_signed, /* complain_on_overflow */ 549 m32r_elf_10_pcrel_reloc, /* special_function */ 550 "R_M32R_10_PCREL", /* name */ 551 false, /* partial_inplace */ 552 0xff, /* src_mask */ 553 0xff, /* dst_mask */ 554 true), /* pcrel_offset */ 555 556 /* A relative 18 bit relocation, right shifted by 2. */ 557 HOWTO (R_M32R_18_PCREL, /* type */ 558 2, /* rightshift */ 559 4, /* size */ 560 16, /* bitsize */ 561 true, /* pc_relative */ 562 0, /* bitpos */ 563 complain_overflow_signed, /* complain_on_overflow */ 564 bfd_elf_generic_reloc, /* special_function */ 565 "R_M32R_18_PCREL", /* name */ 566 false, /* partial_inplace */ 567 0xffff, /* src_mask */ 568 0xffff, /* dst_mask */ 569 true), /* pcrel_offset */ 570 571 /* A relative 26 bit relocation, right shifted by 2. */ 572 /* ??? It's not clear whether this should have partial_inplace set or not. 573 Branch relaxing in the assembler can store the addend in the insn, 574 and if bfd_install_relocation gets called the addend may get added 575 again. */ 576 HOWTO (R_M32R_26_PCREL, /* type */ 577 2, /* rightshift */ 578 4, /* size */ 579 26, /* bitsize */ 580 true, /* pc_relative */ 581 0, /* bitpos */ 582 complain_overflow_signed, /* complain_on_overflow */ 583 bfd_elf_generic_reloc, /* special_function */ 584 "R_M32R_26_PCREL", /* name */ 585 false, /* partial_inplace */ 586 0xffffff, /* src_mask */ 587 0xffffff, /* dst_mask */ 588 true), /* pcrel_offset */ 589 590 /* High 16 bits of address when lower 16 is or'd in. */ 591 HOWTO (R_M32R_HI16_ULO, /* type */ 592 16, /* rightshift */ 593 4, /* size */ 594 16, /* bitsize */ 595 false, /* pc_relative */ 596 0, /* bitpos */ 597 complain_overflow_dont, /* complain_on_overflow */ 598 m32r_elf_hi16_reloc, /* special_function */ 599 "R_M32R_HI16_ULO", /* name */ 600 true, /* partial_inplace */ 601 0x0000ffff, /* src_mask */ 602 0x0000ffff, /* dst_mask */ 603 false), /* pcrel_offset */ 604 605 /* High 16 bits of address when lower 16 is added in. */ 606 HOWTO (R_M32R_HI16_SLO, /* type */ 607 16, /* rightshift */ 608 4, /* size */ 609 16, /* bitsize */ 610 false, /* pc_relative */ 611 0, /* bitpos */ 612 complain_overflow_dont, /* complain_on_overflow */ 613 m32r_elf_hi16_reloc, /* special_function */ 614 "R_M32R_HI16_SLO", /* name */ 615 true, /* partial_inplace */ 616 0x0000ffff, /* src_mask */ 617 0x0000ffff, /* dst_mask */ 618 false), /* pcrel_offset */ 619 620 /* Lower 16 bits of address. */ 621 HOWTO (R_M32R_LO16, /* type */ 622 0, /* rightshift */ 623 4, /* size */ 624 16, /* bitsize */ 625 false, /* pc_relative */ 626 0, /* bitpos */ 627 complain_overflow_dont, /* complain_on_overflow */ 628 m32r_elf_lo16_reloc, /* special_function */ 629 "R_M32R_LO16", /* name */ 630 true, /* partial_inplace */ 631 0x0000ffff, /* src_mask */ 632 0x0000ffff, /* dst_mask */ 633 false), /* pcrel_offset */ 634 635 /* Small data area 16 bits offset. */ 636 HOWTO (R_M32R_SDA16, /* type */ 637 0, /* rightshift */ 638 4, /* size */ 639 16, /* bitsize */ 640 false, /* pc_relative */ 641 0, /* bitpos */ 642 complain_overflow_signed, /* complain_on_overflow */ 643 m32r_elf_sda16_reloc, /* special_function */ 644 "R_M32R_SDA16", /* name */ 645 true, /* partial_inplace */ /* FIXME: correct? */ 646 0x0000ffff, /* src_mask */ 647 0x0000ffff, /* dst_mask */ 648 false), /* pcrel_offset */ 649 650 /* GNU extension to record C++ vtable hierarchy. */ 651 HOWTO (R_M32R_GNU_VTINHERIT, /* type */ 652 0, /* rightshift */ 653 4, /* size */ 654 0, /* bitsize */ 655 false, /* pc_relative */ 656 0, /* bitpos */ 657 complain_overflow_dont, /* complain_on_overflow */ 658 NULL, /* special_function */ 659 "R_M32R_GNU_VTINHERIT", /* name */ 660 false, /* partial_inplace */ 661 0, /* src_mask */ 662 0, /* dst_mask */ 663 false), /* pcrel_offset */ 664 665 /* GNU extension to record C++ vtable member usage. */ 666 HOWTO (R_M32R_GNU_VTENTRY, /* type */ 667 0, /* rightshift */ 668 4, /* size */ 669 0, /* bitsize */ 670 false, /* pc_relative */ 671 0, /* bitpos */ 672 complain_overflow_dont, /* complain_on_overflow */ 673 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 674 "R_M32R_GNU_VTENTRY", /* name */ 675 false, /* partial_inplace */ 676 0, /* src_mask */ 677 0, /* dst_mask */ 678 false), /* pcrel_offset */ 679 680 EMPTY_HOWTO (13), 681 EMPTY_HOWTO (14), 682 EMPTY_HOWTO (15), 683 EMPTY_HOWTO (16), 684 EMPTY_HOWTO (17), 685 EMPTY_HOWTO (18), 686 EMPTY_HOWTO (19), 687 EMPTY_HOWTO (20), 688 EMPTY_HOWTO (21), 689 EMPTY_HOWTO (22), 690 EMPTY_HOWTO (23), 691 EMPTY_HOWTO (24), 692 EMPTY_HOWTO (25), 693 EMPTY_HOWTO (26), 694 EMPTY_HOWTO (27), 695 EMPTY_HOWTO (28), 696 EMPTY_HOWTO (29), 697 EMPTY_HOWTO (30), 698 EMPTY_HOWTO (31), 699 EMPTY_HOWTO (32), 700 701 /* A 16 bit absolute relocation. */ 702 HOWTO (R_M32R_16_RELA, /* type */ 703 0, /* rightshift */ 704 2, /* size */ 705 16, /* bitsize */ 706 false, /* pc_relative */ 707 0, /* bitpos */ 708 complain_overflow_bitfield, /* complain_on_overflow */ 709 bfd_elf_generic_reloc, /* special_function */ 710 "R_M32R_16_RELA", /* name */ 711 false, /* partial_inplace */ 712 0xffff, /* src_mask */ 713 0xffff, /* dst_mask */ 714 false), /* pcrel_offset */ 715 716 /* A 32 bit absolute relocation. */ 717 HOWTO (R_M32R_32_RELA, /* type */ 718 0, /* rightshift */ 719 4, /* size */ 720 32, /* bitsize */ 721 false, /* pc_relative */ 722 0, /* bitpos */ 723 complain_overflow_bitfield, /* complain_on_overflow */ 724 bfd_elf_generic_reloc,/* special_function */ 725 "R_M32R_32_RELA", /* name */ 726 false, /* partial_inplace */ 727 0xffffffff, /* src_mask */ 728 0xffffffff, /* dst_mask */ 729 false), /* pcrel_offset */ 730 731 /* A 24 bit address. */ 732 HOWTO (R_M32R_24_RELA, /* type */ 733 0, /* rightshift */ 734 4, /* size */ 735 24, /* bitsize */ 736 false, /* pc_relative */ 737 0, /* bitpos */ 738 complain_overflow_unsigned, /* complain_on_overflow */ 739 bfd_elf_generic_reloc,/* special_function */ 740 "R_M32R_24_RELA", /* name */ 741 false, /* partial_inplace */ 742 0xffffff, /* src_mask */ 743 0xffffff, /* dst_mask */ 744 false), /* pcrel_offset */ 745 746 HOWTO (R_M32R_10_PCREL_RELA, /* type */ 747 2, /* rightshift */ 748 2, /* size */ 749 10, /* bitsize */ 750 true, /* pc_relative */ 751 0, /* bitpos */ 752 complain_overflow_signed, /* complain_on_overflow */ 753 m32r_elf_10_pcrel_reloc, /* special_function */ 754 "R_M32R_10_PCREL_RELA",/* name */ 755 false, /* partial_inplace */ 756 0xff, /* src_mask */ 757 0xff, /* dst_mask */ 758 true), /* pcrel_offset */ 759 760 /* A relative 18 bit relocation, right shifted by 2. */ 761 HOWTO (R_M32R_18_PCREL_RELA, /* type */ 762 2, /* rightshift */ 763 4, /* size */ 764 16, /* bitsize */ 765 true, /* pc_relative */ 766 0, /* bitpos */ 767 complain_overflow_signed, /* complain_on_overflow */ 768 bfd_elf_generic_reloc, /* special_function */ 769 "R_M32R_18_PCREL_RELA",/* name */ 770 false, /* partial_inplace */ 771 0xffff, /* src_mask */ 772 0xffff, /* dst_mask */ 773 true), /* pcrel_offset */ 774 775 /* A relative 26 bit relocation, right shifted by 2. */ 776 HOWTO (R_M32R_26_PCREL_RELA, /* type */ 777 2, /* rightshift */ 778 4, /* size */ 779 26, /* bitsize */ 780 true, /* pc_relative */ 781 0, /* bitpos */ 782 complain_overflow_signed, /* complain_on_overflow */ 783 bfd_elf_generic_reloc, /* special_function */ 784 "R_M32R_26_PCREL_RELA",/* name */ 785 false, /* partial_inplace */ 786 0xffffff, /* src_mask */ 787 0xffffff, /* dst_mask */ 788 true), /* pcrel_offset */ 789 790 /* High 16 bits of address when lower 16 is or'd in. */ 791 HOWTO (R_M32R_HI16_ULO_RELA, /* type */ 792 16, /* rightshift */ 793 4, /* size */ 794 16, /* bitsize */ 795 false, /* pc_relative */ 796 0, /* bitpos */ 797 complain_overflow_dont, /* complain_on_overflow */ 798 bfd_elf_generic_reloc, /* special_function */ 799 "R_M32R_HI16_ULO_RELA",/* name */ 800 false, /* partial_inplace */ 801 0x0000ffff, /* src_mask */ 802 0x0000ffff, /* dst_mask */ 803 false), /* pcrel_offset */ 804 805 /* High 16 bits of address when lower 16 is added in. */ 806 HOWTO (R_M32R_HI16_SLO_RELA, /* type */ 807 16, /* rightshift */ 808 4, /* size */ 809 16, /* bitsize */ 810 false, /* pc_relative */ 811 0, /* bitpos */ 812 complain_overflow_dont, /* complain_on_overflow */ 813 bfd_elf_generic_reloc, /* special_function */ 814 "R_M32R_HI16_SLO_RELA",/* name */ 815 false, /* partial_inplace */ 816 0x0000ffff, /* src_mask */ 817 0x0000ffff, /* dst_mask */ 818 false), /* pcrel_offset */ 819 820 /* Lower 16 bits of address. */ 821 HOWTO (R_M32R_LO16_RELA, /* type */ 822 0, /* rightshift */ 823 4, /* size */ 824 16, /* bitsize */ 825 false, /* pc_relative */ 826 0, /* bitpos */ 827 complain_overflow_dont, /* complain_on_overflow */ 828 bfd_elf_generic_reloc, /* special_function */ 829 "R_M32R_LO16_RELA", /* name */ 830 false, /* partial_inplace */ 831 0x0000ffff, /* src_mask */ 832 0x0000ffff, /* dst_mask */ 833 false), /* pcrel_offset */ 834 835 /* Small data area 16 bits offset. */ 836 HOWTO (R_M32R_SDA16_RELA, /* type */ 837 0, /* rightshift */ 838 4, /* size */ 839 16, /* bitsize */ 840 false, /* pc_relative */ 841 0, /* bitpos */ 842 complain_overflow_signed, /* complain_on_overflow */ 843 bfd_elf_generic_reloc, /* special_function */ 844 "R_M32R_SDA16_RELA", /* name */ 845 true, /* partial_inplace */ /* FIXME: correct? */ 846 0x0000ffff, /* src_mask */ 847 0x0000ffff, /* dst_mask */ 848 false), /* pcrel_offset */ 849 850 /* GNU extension to record C++ vtable hierarchy. */ 851 HOWTO (R_M32R_RELA_GNU_VTINHERIT, /* type */ 852 0, /* rightshift */ 853 4, /* size */ 854 0, /* bitsize */ 855 false, /* pc_relative */ 856 0, /* bitpos */ 857 complain_overflow_dont, /* complain_on_overflow */ 858 NULL, /* special_function */ 859 "R_M32R_RELA_GNU_VTINHERIT", /* name */ 860 false, /* partial_inplace */ 861 0, /* src_mask */ 862 0, /* dst_mask */ 863 false), /* pcrel_offset */ 864 865 /* GNU extension to record C++ vtable member usage. */ 866 HOWTO (R_M32R_RELA_GNU_VTENTRY, /* type */ 867 0, /* rightshift */ 868 4, /* size */ 869 0, /* bitsize */ 870 false, /* pc_relative */ 871 0, /* bitpos */ 872 complain_overflow_dont, /* complain_on_overflow */ 873 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 874 "R_M32R_RELA_GNU_VTENTRY", /* name */ 875 false, /* partial_inplace */ 876 0, /* src_mask */ 877 0, /* dst_mask */ 878 false), /* pcrel_offset */ 879 880 /* A 32 bit PC relative relocation. */ 881 HOWTO (R_M32R_REL32, /* type */ 882 0, /* rightshift */ 883 4, /* size */ 884 32, /* bitsize */ 885 true, /* pc_relative */ 886 0, /* bitpos */ 887 complain_overflow_bitfield, /* complain_on_overflow */ 888 bfd_elf_generic_reloc,/* special_function */ 889 "R_M32R_REL32", /* name */ 890 false, /* partial_inplace */ 891 0xffffffff, /* src_mask */ 892 0xffffffff, /* dst_mask */ 893 true), /* pcrel_offset */ 894 895 EMPTY_HOWTO (46), 896 EMPTY_HOWTO (47), 897 898 /* Like R_M32R_24, but referring to the GOT table entry for 899 the symbol. */ 900 HOWTO (R_M32R_GOT24, /* type */ 901 0, /* rightshift */ 902 4, /* size */ 903 24, /* bitsize */ 904 false, /* pc_relative */ 905 0, /* bitpos */ 906 complain_overflow_unsigned, /* complain_on_overflow */ 907 bfd_elf_generic_reloc, /* special_function */ 908 "R_M32R_GOT24", /* name */ 909 false, /* partial_inplace */ 910 0xffffff, /* src_mask */ 911 0xffffff, /* dst_mask */ 912 false), /* pcrel_offset */ 913 914 /* Like R_M32R_PCREL, but referring to the procedure linkage table 915 entry for the symbol. */ 916 HOWTO (R_M32R_26_PLTREL, /* type */ 917 2, /* rightshift */ 918 4, /* size */ 919 24, /* bitsize */ 920 true, /* pc_relative */ 921 0, /* bitpos */ 922 complain_overflow_signed, /* complain_on_overflow */ 923 bfd_elf_generic_reloc, /* special_function */ 924 "R_M32R_26_PLTREL", /* name */ 925 false, /* partial_inplace */ 926 0xffffff, /* src_mask */ 927 0xffffff, /* dst_mask */ 928 true), /* pcrel_offset */ 929 930 /* This is used only by the dynamic linker. The symbol should exist 931 both in the object being run and in some shared library. The 932 dynamic linker copies the data addressed by the symbol from the 933 shared library into the object, because the object being 934 run has to have the data at some particular address. */ 935 HOWTO (R_M32R_COPY, /* type */ 936 0, /* rightshift */ 937 4, /* size */ 938 32, /* bitsize */ 939 false, /* pc_relative */ 940 0, /* bitpos */ 941 complain_overflow_bitfield, /* complain_on_overflow */ 942 bfd_elf_generic_reloc, /* special_function */ 943 "R_M32R_COPY", /* name */ 944 false, /* partial_inplace */ 945 0xffffffff, /* src_mask */ 946 0xffffffff, /* dst_mask */ 947 false), /* pcrel_offset */ 948 949 /* Like R_M32R_24, but used when setting global offset table 950 entries. */ 951 HOWTO (R_M32R_GLOB_DAT, /* type */ 952 0, /* rightshift */ 953 4, /* size */ 954 32, /* bitsize */ 955 false, /* pc_relative */ 956 0, /* bitpos */ 957 complain_overflow_bitfield, /* complain_on_overflow */ 958 bfd_elf_generic_reloc, /* special_function */ 959 "R_M32R_GLOB_DAT", /* name */ 960 false, /* partial_inplace */ 961 0xffffffff, /* src_mask */ 962 0xffffffff, /* dst_mask */ 963 false), /* pcrel_offset */ 964 965 /* Marks a procedure linkage table entry for a symbol. */ 966 HOWTO (R_M32R_JMP_SLOT, /* type */ 967 0, /* rightshift */ 968 4, /* size */ 969 32, /* bitsize */ 970 false, /* pc_relative */ 971 0, /* bitpos */ 972 complain_overflow_bitfield, /* complain_on_overflow */ 973 bfd_elf_generic_reloc, /* special_function */ 974 "R_M32R_JMP_SLOT", /* name */ 975 false, /* partial_inplace */ 976 0xffffffff, /* src_mask */ 977 0xffffffff, /* dst_mask */ 978 false), /* pcrel_offset */ 979 980 /* Used only by the dynamic linker. When the object is run, this 981 longword is set to the load address of the object, plus the 982 addend. */ 983 HOWTO (R_M32R_RELATIVE, /* type */ 984 0, /* rightshift */ 985 4, /* size */ 986 32, /* bitsize */ 987 false, /* pc_relative */ 988 0, /* bitpos */ 989 complain_overflow_bitfield, /* complain_on_overflow */ 990 bfd_elf_generic_reloc, /* special_function */ 991 "R_M32R_RELATIVE", /* name */ 992 false, /* partial_inplace */ 993 0xffffffff, /* src_mask */ 994 0xffffffff, /* dst_mask */ 995 false), /* pcrel_offset */ 996 997 HOWTO (R_M32R_GOTOFF, /* type */ 998 0, /* rightshift */ 999 4, /* size */ 1000 24, /* bitsize */ 1001 false, /* pc_relative */ 1002 0, /* bitpos */ 1003 complain_overflow_bitfield, /* complain_on_overflow */ 1004 bfd_elf_generic_reloc, /* special_function */ 1005 "R_M32R_GOTOFF", /* name */ 1006 false, /* partial_inplace */ 1007 0xffffff, /* src_mask */ 1008 0xffffff, /* dst_mask */ 1009 false), /* pcrel_offset */ 1010 1011 /* An PC Relative 24-bit relocation used when setting PIC offset 1012 table register. */ 1013 HOWTO (R_M32R_GOTPC24, /* type */ 1014 0, /* rightshift */ 1015 4, /* size */ 1016 24, /* bitsize */ 1017 true, /* pc_relative */ 1018 0, /* bitpos */ 1019 complain_overflow_unsigned, /* complain_on_overflow */ 1020 bfd_elf_generic_reloc, /* special_function */ 1021 "R_M32R_GOTPC24", /* name */ 1022 false, /* partial_inplace */ 1023 0xffffff, /* src_mask */ 1024 0xffffff, /* dst_mask */ 1025 true), /* pcrel_offset */ 1026 1027 /* Like R_M32R_HI16_ULO, but referring to the GOT table entry for 1028 the symbol. */ 1029 HOWTO (R_M32R_GOT16_HI_ULO, /* type */ 1030 16, /* rightshift */ 1031 4, /* size */ 1032 16, /* bitsize */ 1033 false, /* pc_relative */ 1034 0, /* bitpos */ 1035 complain_overflow_dont, /* complain_on_overflow */ 1036 bfd_elf_generic_reloc, /* special_function */ 1037 "R_M32R_GOT16_HI_ULO", /* name */ 1038 false, /* partial_inplace */ 1039 0x0000ffff, /* src_mask */ 1040 0x0000ffff, /* dst_mask */ 1041 false), /* pcrel_offset */ 1042 1043 /* Like R_M32R_HI16_SLO, but referring to the GOT table entry for 1044 the symbol. */ 1045 HOWTO (R_M32R_GOT16_HI_SLO, /* type */ 1046 16, /* rightshift */ 1047 4, /* size */ 1048 16, /* bitsize */ 1049 false, /* pc_relative */ 1050 0, /* bitpos */ 1051 complain_overflow_dont, /* complain_on_overflow */ 1052 bfd_elf_generic_reloc, /* special_function */ 1053 "R_M32R_GOT16_HI_SLO", /* name */ 1054 false, /* partial_inplace */ 1055 0x0000ffff, /* src_mask */ 1056 0x0000ffff, /* dst_mask */ 1057 false), /* pcrel_offset */ 1058 1059 /* Like R_M32R_LO16, but referring to the GOT table entry for 1060 the symbol. */ 1061 HOWTO (R_M32R_GOT16_LO, /* type */ 1062 0, /* rightshift */ 1063 4, /* size */ 1064 16, /* bitsize */ 1065 false, /* pc_relative */ 1066 0, /* bitpos */ 1067 complain_overflow_dont, /* complain_on_overflow */ 1068 bfd_elf_generic_reloc, /* special_function */ 1069 "R_M32R_GOT16_LO", /* name */ 1070 false, /* partial_inplace */ 1071 0x0000ffff, /* src_mask */ 1072 0x0000ffff, /* dst_mask */ 1073 false), /* pcrel_offset */ 1074 1075 /* An PC Relative relocation used when setting PIC offset table register. 1076 Like R_M32R_HI16_ULO, but referring to the GOT table entry for 1077 the symbol. */ 1078 HOWTO (R_M32R_GOTPC_HI_ULO, /* type */ 1079 16, /* rightshift */ 1080 4, /* size */ 1081 16, /* bitsize */ 1082 false, /* pc_relative */ 1083 0, /* bitpos */ 1084 complain_overflow_dont, /* complain_on_overflow */ 1085 bfd_elf_generic_reloc, /* special_function */ 1086 "R_M32R_GOTPC_HI_ULO", /* name */ 1087 false, /* partial_inplace */ 1088 0x0000ffff, /* src_mask */ 1089 0x0000ffff, /* dst_mask */ 1090 true), /* pcrel_offset */ 1091 1092 /* An PC Relative relocation used when setting PIC offset table register. 1093 Like R_M32R_HI16_SLO, but referring to the GOT table entry for 1094 the symbol. */ 1095 HOWTO (R_M32R_GOTPC_HI_SLO, /* type */ 1096 16, /* rightshift */ 1097 4, /* size */ 1098 16, /* bitsize */ 1099 false, /* pc_relative */ 1100 0, /* bitpos */ 1101 complain_overflow_dont, /* complain_on_overflow */ 1102 bfd_elf_generic_reloc, /* special_function */ 1103 "R_M32R_GOTPC_HI_SLO", /* name */ 1104 false, /* partial_inplace */ 1105 0x0000ffff, /* src_mask */ 1106 0x0000ffff, /* dst_mask */ 1107 true), /* pcrel_offset */ 1108 1109 /* An PC Relative relocation used when setting PIC offset table register. 1110 Like R_M32R_LO16, but referring to the GOT table entry for 1111 the symbol. */ 1112 HOWTO (R_M32R_GOTPC_LO, /* type */ 1113 0, /* rightshift */ 1114 4, /* size */ 1115 16, /* bitsize */ 1116 false, /* pc_relative */ 1117 0, /* bitpos */ 1118 complain_overflow_dont, /* complain_on_overflow */ 1119 bfd_elf_generic_reloc, /* special_function */ 1120 "R_M32R_GOTPC_LO", /* name */ 1121 false, /* partial_inplace */ 1122 0x0000ffff, /* src_mask */ 1123 0x0000ffff, /* dst_mask */ 1124 true), /* pcrel_offset */ 1125 1126 HOWTO (R_M32R_GOTOFF_HI_ULO, /* type */ 1127 16, /* rightshift */ 1128 4, /* size */ 1129 16, /* bitsize */ 1130 false, /* pc_relative */ 1131 0, /* bitpos */ 1132 complain_overflow_dont, /* complain_on_overflow */ 1133 bfd_elf_generic_reloc, /* special_function */ 1134 "R_M32R_GOTOFF_HI_ULO",/* name */ 1135 false, /* partial_inplace */ 1136 0x0000ffff, /* src_mask */ 1137 0x0000ffff, /* dst_mask */ 1138 false), /* pcrel_offset */ 1139 1140 HOWTO (R_M32R_GOTOFF_HI_SLO, /* type */ 1141 16, /* rightshift */ 1142 4, /* size */ 1143 16, /* bitsize */ 1144 false, /* pc_relative */ 1145 0, /* bitpos */ 1146 complain_overflow_dont, /* complain_on_overflow */ 1147 bfd_elf_generic_reloc, /* special_function */ 1148 "R_M32R_GOTOFF_HI_SLO",/* name */ 1149 false, /* partial_inplace */ 1150 0x0000ffff, /* src_mask */ 1151 0x0000ffff, /* dst_mask */ 1152 false), /* pcrel_offset */ 1153 1154 HOWTO (R_M32R_GOTOFF_LO, /* type */ 1155 0, /* rightshift */ 1156 4, /* size */ 1157 16, /* bitsize */ 1158 false, /* pc_relative */ 1159 0, /* bitpos */ 1160 complain_overflow_dont, /* complain_on_overflow */ 1161 bfd_elf_generic_reloc, /* special_function */ 1162 "R_M32R_GOTOFF_LO", /* name */ 1163 false, /* partial_inplace */ 1164 0x0000ffff, /* src_mask */ 1165 0x0000ffff, /* dst_mask */ 1166 false), /* pcrel_offset */ 1167 }; 1168 1169 /* Map BFD reloc types to M32R ELF reloc types. */ 1170 1171 struct m32r_reloc_map 1172 { 1173 bfd_reloc_code_real_type bfd_reloc_val; 1174 unsigned char elf_reloc_val; 1175 }; 1176 1177 #ifdef USE_M32R_OLD_RELOC 1178 static const struct m32r_reloc_map m32r_reloc_map_old[] = 1179 { 1180 { BFD_RELOC_NONE, R_M32R_NONE }, 1181 { BFD_RELOC_16, R_M32R_16 }, 1182 { BFD_RELOC_32, R_M32R_32 }, 1183 { BFD_RELOC_M32R_24, R_M32R_24 }, 1184 { BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL }, 1185 { BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL }, 1186 { BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL }, 1187 { BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO }, 1188 { BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO }, 1189 { BFD_RELOC_M32R_LO16, R_M32R_LO16 }, 1190 { BFD_RELOC_M32R_SDA16, R_M32R_SDA16 }, 1191 { BFD_RELOC_VTABLE_INHERIT, R_M32R_GNU_VTINHERIT }, 1192 { BFD_RELOC_VTABLE_ENTRY, R_M32R_GNU_VTENTRY }, 1193 }; 1194 #else 1195 static const struct m32r_reloc_map m32r_reloc_map[] = 1196 { 1197 { BFD_RELOC_NONE, R_M32R_NONE }, 1198 { BFD_RELOC_16, R_M32R_16_RELA }, 1199 { BFD_RELOC_32, R_M32R_32_RELA }, 1200 { BFD_RELOC_M32R_24, R_M32R_24_RELA }, 1201 { BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL_RELA }, 1202 { BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL_RELA }, 1203 { BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL_RELA }, 1204 { BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO_RELA }, 1205 { BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO_RELA }, 1206 { BFD_RELOC_M32R_LO16, R_M32R_LO16_RELA }, 1207 { BFD_RELOC_M32R_SDA16, R_M32R_SDA16_RELA }, 1208 { BFD_RELOC_VTABLE_INHERIT, R_M32R_RELA_GNU_VTINHERIT }, 1209 { BFD_RELOC_VTABLE_ENTRY, R_M32R_RELA_GNU_VTENTRY }, 1210 { BFD_RELOC_32_PCREL, R_M32R_REL32 }, 1211 1212 { BFD_RELOC_M32R_GOT24, R_M32R_GOT24 }, 1213 { BFD_RELOC_M32R_26_PLTREL, R_M32R_26_PLTREL }, 1214 { BFD_RELOC_M32R_COPY, R_M32R_COPY }, 1215 { BFD_RELOC_M32R_GLOB_DAT, R_M32R_GLOB_DAT }, 1216 { BFD_RELOC_M32R_JMP_SLOT, R_M32R_JMP_SLOT }, 1217 { BFD_RELOC_M32R_RELATIVE, R_M32R_RELATIVE }, 1218 { BFD_RELOC_M32R_GOTOFF, R_M32R_GOTOFF }, 1219 { BFD_RELOC_M32R_GOTPC24, R_M32R_GOTPC24 }, 1220 { BFD_RELOC_M32R_GOT16_HI_ULO, R_M32R_GOT16_HI_ULO }, 1221 { BFD_RELOC_M32R_GOT16_HI_SLO, R_M32R_GOT16_HI_SLO }, 1222 { BFD_RELOC_M32R_GOT16_LO, R_M32R_GOT16_LO }, 1223 { BFD_RELOC_M32R_GOTPC_HI_ULO, R_M32R_GOTPC_HI_ULO }, 1224 { BFD_RELOC_M32R_GOTPC_HI_SLO, R_M32R_GOTPC_HI_SLO }, 1225 { BFD_RELOC_M32R_GOTPC_LO, R_M32R_GOTPC_LO }, 1226 { BFD_RELOC_M32R_GOTOFF_HI_ULO, R_M32R_GOTOFF_HI_ULO }, 1227 { BFD_RELOC_M32R_GOTOFF_HI_SLO, R_M32R_GOTOFF_HI_SLO }, 1228 { BFD_RELOC_M32R_GOTOFF_LO, R_M32R_GOTOFF_LO }, 1229 }; 1230 #endif 1231 1232 static reloc_howto_type * 1233 bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1234 bfd_reloc_code_real_type code) 1235 { 1236 unsigned int i; 1237 1238 #ifdef USE_M32R_OLD_RELOC 1239 for (i = 0; 1240 i < sizeof (m32r_reloc_map_old) / sizeof (struct m32r_reloc_map); 1241 i++) 1242 if (m32r_reloc_map_old[i].bfd_reloc_val == code) 1243 return &m32r_elf_howto_table[m32r_reloc_map_old[i].elf_reloc_val]; 1244 1245 #else /* ! USE_M32R_OLD_RELOC */ 1246 1247 for (i = 0; 1248 i < sizeof (m32r_reloc_map) / sizeof (struct m32r_reloc_map); 1249 i++) 1250 if (m32r_reloc_map[i].bfd_reloc_val == code) 1251 return &m32r_elf_howto_table[m32r_reloc_map[i].elf_reloc_val]; 1252 #endif 1253 1254 return NULL; 1255 } 1256 1257 static reloc_howto_type * 1258 bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1259 const char *r_name) 1260 { 1261 unsigned int i; 1262 1263 for (i = 0; 1264 i < sizeof (m32r_elf_howto_table) / sizeof (m32r_elf_howto_table[0]); 1265 i++) 1266 if (m32r_elf_howto_table[i].name != NULL 1267 && strcasecmp (m32r_elf_howto_table[i].name, r_name) == 0) 1268 return &m32r_elf_howto_table[i]; 1269 1270 return NULL; 1271 } 1272 1273 /* Set the howto pointer for an M32R ELF reloc. */ 1274 1275 static bool 1276 m32r_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, 1277 arelent *cache_ptr, 1278 Elf_Internal_Rela *dst) 1279 { 1280 unsigned int r_type; 1281 1282 r_type = ELF32_R_TYPE (dst->r_info); 1283 if (r_type > (unsigned int) R_M32R_GNU_VTENTRY) 1284 { 1285 /* xgettext:c-format */ 1286 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 1287 abfd, r_type); 1288 bfd_set_error (bfd_error_bad_value); 1289 return false; 1290 } 1291 cache_ptr->howto = &m32r_elf_howto_table[r_type]; 1292 return true; 1293 } 1294 1295 static bool 1296 m32r_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 1297 arelent *cache_ptr, 1298 Elf_Internal_Rela *dst) 1299 { 1300 unsigned int r_type = ELF32_R_TYPE (dst->r_info); 1301 1302 if (r_type == (unsigned int) R_M32R_NONE 1303 || ((r_type > (unsigned int) R_M32R_GNU_VTENTRY) 1304 && (r_type < (unsigned int) R_M32R_max))) 1305 { 1306 cache_ptr->howto = &m32r_elf_howto_table[r_type]; 1307 return true; 1308 } 1309 1310 /* xgettext:c-format */ 1311 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, r_type); 1312 bfd_set_error (bfd_error_bad_value); 1313 return false; 1314 } 1315 1316 1317 /* Given a BFD section, try to locate the corresponding ELF section 1318 index. */ 1319 1320 static bool 1321 _bfd_m32r_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, 1322 asection *sec, 1323 int *retval) 1324 { 1325 if (strcmp (bfd_section_name (sec), ".scommon") == 0) 1326 { 1327 *retval = SHN_M32R_SCOMMON; 1328 return true; 1329 } 1330 return false; 1331 } 1332 1333 /* M32R ELF uses two common sections. One is the usual one, and the other 1334 is for small objects. All the small objects are kept together, and then 1335 referenced via one register, which yields faster assembler code. It is 1336 up to the compiler to emit an instruction to load the register with 1337 _SDA_BASE. This is what we use for the small common section. This 1338 approach is copied from elf32-mips.c. */ 1339 static asection m32r_elf_scom_section; 1340 static const asymbol m32r_elf_scom_symbol = 1341 GLOBAL_SYM_INIT (".scommon", &m32r_elf_scom_section); 1342 static asection m32r_elf_scom_section = 1343 BFD_FAKE_SECTION (m32r_elf_scom_section, &m32r_elf_scom_symbol, 1344 ".scommon", 0, SEC_IS_COMMON | SEC_SMALL_DATA); 1345 1346 /* Handle the special M32R section numbers that a symbol may use. */ 1347 1348 static void 1349 _bfd_m32r_elf_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *asym) 1350 { 1351 elf_symbol_type *elfsym = (elf_symbol_type *) asym; 1352 1353 switch (elfsym->internal_elf_sym.st_shndx) 1354 { 1355 case SHN_M32R_SCOMMON: 1356 asym->section = &m32r_elf_scom_section; 1357 asym->value = elfsym->internal_elf_sym.st_size; 1358 break; 1359 } 1360 } 1361 1362 /* Hook called by the linker routine which adds symbols from an object 1363 file. We must handle the special M32R section numbers here. 1364 We also keep watching for whether we need to create the sdata special 1365 linker sections. */ 1366 1367 static bool 1368 m32r_elf_add_symbol_hook (bfd *abfd, 1369 struct bfd_link_info *info, 1370 Elf_Internal_Sym *sym, 1371 const char **namep, 1372 flagword *flagsp ATTRIBUTE_UNUSED, 1373 asection **secp, 1374 bfd_vma *valp) 1375 { 1376 if (! bfd_link_relocatable (info) 1377 && (*namep)[0] == '_' && (*namep)[1] == 'S' 1378 && strcmp (*namep, "_SDA_BASE_") == 0 1379 && is_elf_hash_table (info->hash)) 1380 { 1381 /* This is simpler than using _bfd_elf_create_linker_section 1382 (our needs are simpler than ppc's needs). Also 1383 _bfd_elf_create_linker_section currently has a bug where if a .sdata 1384 section already exists a new one is created that follows it which 1385 screws of _SDA_BASE_ address calcs because output_offset != 0. */ 1386 struct elf_link_hash_entry *h; 1387 struct bfd_link_hash_entry *bh; 1388 asection *s = bfd_get_section_by_name (abfd, ".sdata"); 1389 1390 /* The following code was cobbled from elf32-ppc.c and elflink.c. */ 1391 if (s == NULL) 1392 { 1393 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 1394 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 1395 1396 s = bfd_make_section_anyway_with_flags (abfd, ".sdata", 1397 flags); 1398 if (s == NULL) 1399 return false; 1400 if (!bfd_set_section_alignment (s, 2)) 1401 return false; 1402 } 1403 1404 bh = bfd_link_hash_lookup (info->hash, "_SDA_BASE_", 1405 false, false, false); 1406 1407 if ((bh == NULL || bh->type == bfd_link_hash_undefined) 1408 && !(_bfd_generic_link_add_one_symbol (info, 1409 abfd, 1410 "_SDA_BASE_", 1411 BSF_GLOBAL, 1412 s, 1413 (bfd_vma) 32768, 1414 NULL, 1415 false, 1416 get_elf_backend_data (abfd)->collect, 1417 &bh))) 1418 return false; 1419 h = (struct elf_link_hash_entry *) bh; 1420 h->type = STT_OBJECT; 1421 } 1422 1423 switch (sym->st_shndx) 1424 { 1425 case SHN_M32R_SCOMMON: 1426 *secp = bfd_make_section_old_way (abfd, ".scommon"); 1427 (*secp)->flags |= SEC_IS_COMMON | SEC_SMALL_DATA; 1428 *valp = sym->st_size; 1429 break; 1430 } 1431 1432 return true; 1433 } 1434 1435 /* We have to figure out the SDA_BASE value, so that we can adjust the 1436 symbol value correctly. We look up the symbol _SDA_BASE_ in the output 1437 BFD. If we can't find it, we're stuck. We cache it in the ELF 1438 target data. We don't need to adjust the symbol value for an 1439 external symbol if we are producing relocatable output. */ 1440 1441 static bfd_reloc_status_type 1442 m32r_elf_final_sda_base (bfd *output_bfd, 1443 struct bfd_link_info *info, 1444 const char **error_message, 1445 bfd_vma *psb) 1446 { 1447 if (elf_gp (output_bfd) == 0) 1448 { 1449 struct bfd_link_hash_entry *h; 1450 1451 h = bfd_link_hash_lookup (info->hash, "_SDA_BASE_", false, false, true); 1452 if (h != NULL && h->type == bfd_link_hash_defined) 1453 elf_gp (output_bfd) = (h->u.def.value 1454 + h->u.def.section->output_section->vma 1455 + h->u.def.section->output_offset); 1456 else 1457 { 1458 /* Only get the error once. */ 1459 *psb = elf_gp (output_bfd) = 4; 1460 *error_message = 1461 (const char *) _("SDA relocation when _SDA_BASE_ not defined"); 1462 return bfd_reloc_dangerous; 1463 } 1464 } 1465 *psb = elf_gp (output_bfd); 1466 return bfd_reloc_ok; 1467 } 1468 1469 /* Return size of a PLT entry. */ 1470 #define elf_m32r_sizeof_plt(info) PLT_ENTRY_SIZE 1471 1472 /* The m32r linker needs to keep track of the number of relocs that it 1473 decides to copy in check_relocs for each symbol. This is so that 1474 it can discard PC relative relocs if it doesn't need them when 1475 linking with -Bsymbolic. We store the information in a field 1476 extending the regular ELF linker hash table. */ 1477 1478 /* This structure keeps track of the number of PC relative relocs we 1479 have copied for a given symbol. */ 1480 1481 struct elf_m32r_pcrel_relocs_copied 1482 { 1483 /* Next section. */ 1484 struct elf_m32r_pcrel_relocs_copied *next; 1485 /* A section in dynobj. */ 1486 asection *section; 1487 /* Number of relocs copied in this section. */ 1488 bfd_size_type count; 1489 }; 1490 1491 /* Traverse an m32r ELF linker hash table. */ 1492 1493 #define m32r_elf_link_hash_traverse(table, func, info) \ 1494 (elf_link_hash_traverse \ 1495 (&(table)->root, \ 1496 (bool (*) (struct elf_link_hash_entry *, void *)) (func), \ 1497 (info))) 1498 1499 /* Get the m32r ELF linker hash table from a link_info structure. */ 1500 1501 #define m32r_elf_hash_table(p) \ 1502 ((is_elf_hash_table ((p)->hash) \ 1503 && elf_hash_table_id (elf_hash_table (p)) == M32R_ELF_DATA) \ 1504 ? (struct elf_link_hash_table *) (p)->hash : NULL) 1505 1506 /* Create an m32r ELF linker hash table. */ 1507 1508 static struct bfd_link_hash_table * 1509 m32r_elf_link_hash_table_create (bfd *abfd) 1510 { 1511 struct elf_link_hash_table *ret; 1512 size_t amt = sizeof (struct elf_link_hash_table); 1513 1514 ret = bfd_zmalloc (amt); 1515 if (ret == NULL) 1516 return NULL; 1517 1518 if (!_bfd_elf_link_hash_table_init (ret, abfd, 1519 _bfd_elf_link_hash_newfunc, 1520 sizeof (struct elf_link_hash_entry), 1521 M32R_ELF_DATA)) 1522 { 1523 free (ret); 1524 return NULL; 1525 } 1526 1527 return &ret->root; 1528 } 1529 1530 /* Create dynamic sections when linking against a dynamic object. */ 1531 1532 static bool 1533 m32r_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 1534 { 1535 struct elf_link_hash_table *htab; 1536 flagword flags, pltflags; 1537 asection *s; 1538 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 1539 int ptralign = 2; /* 32bit */ 1540 1541 htab = m32r_elf_hash_table (info); 1542 if (htab == NULL) 1543 return false; 1544 1545 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and 1546 .rel[a].bss sections. */ 1547 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 1548 | SEC_LINKER_CREATED); 1549 1550 pltflags = flags; 1551 pltflags |= SEC_CODE; 1552 if (bed->plt_not_loaded) 1553 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); 1554 if (bed->plt_readonly) 1555 pltflags |= SEC_READONLY; 1556 1557 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); 1558 htab->splt = s; 1559 if (s == NULL 1560 || !bfd_set_section_alignment (s, bed->plt_alignment)) 1561 return false; 1562 1563 if (bed->want_plt_sym) 1564 { 1565 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the 1566 .plt section. */ 1567 struct bfd_link_hash_entry *bh = NULL; 1568 struct elf_link_hash_entry *h; 1569 1570 if (! (_bfd_generic_link_add_one_symbol 1571 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 1572 (bfd_vma) 0, NULL, false, 1573 get_elf_backend_data (abfd)->collect, &bh))) 1574 return false; 1575 h = (struct elf_link_hash_entry *) bh; 1576 h->def_regular = 1; 1577 h->type = STT_OBJECT; 1578 htab->hplt = h; 1579 1580 if (bfd_link_pic (info) 1581 && ! bfd_elf_link_record_dynamic_symbol (info, h)) 1582 return false; 1583 } 1584 1585 s = bfd_make_section_anyway_with_flags (abfd, 1586 bed->default_use_rela_p 1587 ? ".rela.plt" : ".rel.plt", 1588 flags | SEC_READONLY); 1589 htab->srelplt = s; 1590 if (s == NULL 1591 || !bfd_set_section_alignment (s, ptralign)) 1592 return false; 1593 1594 if (htab->sgot == NULL 1595 && !_bfd_elf_create_got_section (abfd, info)) 1596 return false; 1597 1598 if (bed->want_dynbss) 1599 { 1600 /* The .dynbss section is a place to put symbols which are defined 1601 by dynamic objects, are referenced by regular objects, and are 1602 not functions. We must allocate space for them in the process 1603 image and use a R_*_COPY reloc to tell the dynamic linker to 1604 initialize them at run time. The linker script puts the .dynbss 1605 section into the .bss section of the final image. */ 1606 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", 1607 SEC_ALLOC | SEC_LINKER_CREATED); 1608 htab->sdynbss = s; 1609 if (s == NULL) 1610 return false; 1611 /* The .rel[a].bss section holds copy relocs. This section is not 1612 normally needed. We need to create it here, though, so that the 1613 linker will map it to an output section. We can't just create it 1614 only if we need it, because we will not know whether we need it 1615 until we have seen all the input files, and the first time the 1616 main linker code calls BFD after examining all the input files 1617 (size_dynamic_sections) the input sections have already been 1618 mapped to the output sections. If the section turns out not to 1619 be needed, we can discard it later. We will never need this 1620 section when generating a shared object, since they do not use 1621 copy relocs. */ 1622 if (! bfd_link_pic (info)) 1623 { 1624 s = bfd_make_section_anyway_with_flags (abfd, 1625 (bed->default_use_rela_p 1626 ? ".rela.bss" : ".rel.bss"), 1627 flags | SEC_READONLY); 1628 htab->srelbss = s; 1629 if (s == NULL 1630 || !bfd_set_section_alignment (s, ptralign)) 1631 return false; 1632 } 1633 } 1634 1635 return true; 1636 } 1637 1638 1639 /* Adjust a symbol defined by a dynamic object and referenced by a 1640 regular object. The current definition is in some section of the 1641 dynamic object, but we're not including those sections. We have to 1642 change the definition to something the rest of the link can 1643 understand. */ 1644 1645 static bool 1646 m32r_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 1647 struct elf_link_hash_entry *h) 1648 { 1649 struct elf_link_hash_table *htab; 1650 bfd *dynobj; 1651 asection *s; 1652 1653 #ifdef DEBUG_PIC 1654 printf ("m32r_elf_adjust_dynamic_symbol()\n"); 1655 #endif 1656 1657 dynobj = elf_hash_table (info)->dynobj; 1658 1659 /* Make sure we know what is going on here. */ 1660 BFD_ASSERT (dynobj != NULL 1661 && (h->needs_plt 1662 || h->is_weakalias 1663 || (h->def_dynamic 1664 && h->ref_regular 1665 && !h->def_regular))); 1666 1667 /* If this is a function, put it in the procedure linkage table. We 1668 will fill in the contents of the procedure linkage table later, 1669 when we know the address of the .got section. */ 1670 if (h->type == STT_FUNC 1671 || h->needs_plt) 1672 { 1673 if (! bfd_link_pic (info) 1674 && !h->def_dynamic 1675 && !h->ref_dynamic 1676 && h->root.type != bfd_link_hash_undefweak 1677 && h->root.type != bfd_link_hash_undefined) 1678 { 1679 /* This case can occur if we saw a PLT reloc in an input 1680 file, but the symbol was never referred to by a dynamic 1681 object. In such a case, we don't actually need to build 1682 a procedure linkage table, and we can just do a PCREL 1683 reloc instead. */ 1684 h->plt.offset = (bfd_vma) -1; 1685 h->needs_plt = 0; 1686 } 1687 1688 return true; 1689 } 1690 else 1691 h->plt.offset = (bfd_vma) -1; 1692 1693 /* If this is a weak symbol, and there is a real definition, the 1694 processor independent code will have arranged for us to see the 1695 real definition first, and we can just use the same value. */ 1696 if (h->is_weakalias) 1697 { 1698 struct elf_link_hash_entry *def = weakdef (h); 1699 BFD_ASSERT (def->root.type == bfd_link_hash_defined); 1700 h->root.u.def.section = def->root.u.def.section; 1701 h->root.u.def.value = def->root.u.def.value; 1702 return true; 1703 } 1704 1705 /* This is a reference to a symbol defined by a dynamic object which 1706 is not a function. */ 1707 1708 /* If we are creating a shared library, we must presume that the 1709 only references to the symbol are via the global offset table. 1710 For such cases we need not do anything here; the relocations will 1711 be handled correctly by relocate_section. */ 1712 if (bfd_link_pic (info)) 1713 return true; 1714 1715 /* If there are no references to this symbol that do not use the 1716 GOT, we don't need to generate a copy reloc. */ 1717 if (!h->non_got_ref) 1718 return true; 1719 1720 /* If -z nocopyreloc was given, we won't generate them either. */ 1721 if (0 && info->nocopyreloc) 1722 { 1723 h->non_got_ref = 0; 1724 return true; 1725 } 1726 1727 /* If we don't find any dynamic relocs in read-only sections, then 1728 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 1729 if (0 && !_bfd_elf_readonly_dynrelocs (h)) 1730 { 1731 h->non_got_ref = 0; 1732 return true; 1733 } 1734 1735 /* We must allocate the symbol in our .dynbss section, which will 1736 become part of the .bss section of the executable. There will be 1737 an entry for this symbol in the .dynsym section. The dynamic 1738 object will contain position independent code, so all references 1739 from the dynamic object to this symbol will go through the global 1740 offset table. The dynamic linker will use the .dynsym entry to 1741 determine the address it must put in the global offset table, so 1742 both the dynamic object and the regular object will refer to the 1743 same memory location for the variable. */ 1744 1745 htab = m32r_elf_hash_table (info); 1746 if (htab == NULL) 1747 return false; 1748 1749 s = htab->sdynbss; 1750 BFD_ASSERT (s != NULL); 1751 1752 /* We must generate a R_M32R_COPY reloc to tell the dynamic linker 1753 to copy the initial value out of the dynamic object and into the 1754 runtime process image. We need to remember the offset into the 1755 .rela.bss section we are going to use. */ 1756 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 1757 { 1758 asection *srel; 1759 1760 srel = htab->srelbss; 1761 BFD_ASSERT (srel != NULL); 1762 srel->size += sizeof (Elf32_External_Rela); 1763 h->needs_copy = 1; 1764 } 1765 1766 return _bfd_elf_adjust_dynamic_copy (info, h, s); 1767 } 1768 1769 /* Allocate space in .plt, .got and associated reloc sections for 1770 dynamic relocs. */ 1771 1772 static bool 1773 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) 1774 { 1775 struct bfd_link_info *info; 1776 struct elf_link_hash_table *htab; 1777 struct elf_dyn_relocs *p; 1778 1779 if (h->root.type == bfd_link_hash_indirect) 1780 return true; 1781 1782 info = (struct bfd_link_info *) inf; 1783 htab = m32r_elf_hash_table (info); 1784 if (htab == NULL) 1785 return false; 1786 1787 if (htab->dynamic_sections_created 1788 && h->plt.refcount > 0) 1789 { 1790 /* Make sure this symbol is output as a dynamic symbol. 1791 Undefined weak syms won't yet be marked as dynamic. */ 1792 if (h->dynindx == -1 1793 && !h->forced_local) 1794 { 1795 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1796 return false; 1797 } 1798 1799 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) 1800 { 1801 asection *s = htab->splt; 1802 1803 /* If this is the first .plt entry, make room for the special 1804 first entry. */ 1805 if (s->size == 0) 1806 s->size += PLT_ENTRY_SIZE; 1807 1808 h->plt.offset = s->size; 1809 1810 /* If this symbol is not defined in a regular file, and we are 1811 not generating a shared library, then set the symbol to this 1812 location in the .plt. This is required to make function 1813 pointers compare as equal between the normal executable and 1814 the shared library. */ 1815 if (! bfd_link_pic (info) 1816 && !h->def_regular) 1817 { 1818 h->root.u.def.section = s; 1819 h->root.u.def.value = h->plt.offset; 1820 } 1821 1822 /* Make room for this entry. */ 1823 s->size += PLT_ENTRY_SIZE; 1824 1825 /* We also need to make an entry in the .got.plt section, which 1826 will be placed in the .got section by the linker script. */ 1827 htab->sgotplt->size += 4; 1828 1829 /* We also need to make an entry in the .rel.plt section. */ 1830 htab->srelplt->size += sizeof (Elf32_External_Rela); 1831 } 1832 else 1833 { 1834 h->plt.offset = (bfd_vma) -1; 1835 h->needs_plt = 0; 1836 } 1837 } 1838 else 1839 { 1840 h->plt.offset = (bfd_vma) -1; 1841 h->needs_plt = 0; 1842 } 1843 1844 if (h->got.refcount > 0) 1845 { 1846 asection *s; 1847 bool dyn; 1848 1849 /* Make sure this symbol is output as a dynamic symbol. 1850 Undefined weak syms won't yet be marked as dynamic. */ 1851 if (h->dynindx == -1 1852 && !h->forced_local) 1853 { 1854 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1855 return false; 1856 } 1857 1858 s = htab->sgot; 1859 1860 h->got.offset = s->size; 1861 s->size += 4; 1862 dyn = htab->dynamic_sections_created; 1863 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)) 1864 htab->srelgot->size += sizeof (Elf32_External_Rela); 1865 } 1866 else 1867 h->got.offset = (bfd_vma) -1; 1868 1869 if (h->dyn_relocs == NULL) 1870 return true; 1871 1872 /* In the shared -Bsymbolic case, discard space allocated for 1873 dynamic pc-relative relocs against symbols which turn out to be 1874 defined in regular objects. For the normal shared case, discard 1875 space for pc-relative relocs that have become local due to symbol 1876 visibility changes. */ 1877 1878 if (bfd_link_pic (info)) 1879 { 1880 if (h->def_regular 1881 && (h->forced_local 1882 || info->symbolic)) 1883 { 1884 struct elf_dyn_relocs **pp; 1885 1886 for (pp = &h->dyn_relocs; (p = *pp) != NULL;) 1887 { 1888 p->count -= p->pc_count; 1889 p->pc_count = 0; 1890 if (p->count == 0) 1891 *pp = p->next; 1892 else 1893 pp = &p->next; 1894 } 1895 } 1896 1897 /* Also discard relocs on undefined weak syms with non-default 1898 visibility. */ 1899 if (h->dyn_relocs != NULL 1900 && h->root.type == bfd_link_hash_undefweak) 1901 { 1902 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 1903 h->dyn_relocs = NULL; 1904 1905 /* Make sure undefined weak symbols are output as a dynamic 1906 symbol in PIEs. */ 1907 else if (h->dynindx == -1 1908 && !h->forced_local) 1909 { 1910 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1911 return false; 1912 } 1913 } 1914 } 1915 else 1916 { 1917 /* For the non-shared case, discard space for relocs against 1918 symbols which turn out to need copy relocs or are not 1919 dynamic. */ 1920 1921 if (!h->non_got_ref 1922 && ((h->def_dynamic 1923 && !h->def_regular) 1924 || (htab->dynamic_sections_created 1925 && (h->root.type == bfd_link_hash_undefweak 1926 || h->root.type == bfd_link_hash_undefined)))) 1927 { 1928 /* Make sure this symbol is output as a dynamic symbol. 1929 Undefined weak syms won't yet be marked as dynamic. */ 1930 if (h->dynindx == -1 1931 && !h->forced_local) 1932 { 1933 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1934 return false; 1935 } 1936 1937 /* If that succeeded, we know we'll be keeping all the 1938 relocs. */ 1939 if (h->dynindx != -1) 1940 goto keep; 1941 } 1942 1943 h->dyn_relocs = NULL; 1944 1945 keep: ; 1946 } 1947 1948 /* Finally, allocate space. */ 1949 for (p = h->dyn_relocs; p != NULL; p = p->next) 1950 { 1951 asection *sreloc = elf_section_data (p->sec)->sreloc; 1952 sreloc->size += p->count * sizeof (Elf32_External_Rela); 1953 } 1954 1955 return true; 1956 } 1957 1958 /* Set the sizes of the dynamic sections. */ 1959 1960 static bool 1961 m32r_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 1962 struct bfd_link_info *info) 1963 { 1964 struct elf_link_hash_table *htab; 1965 bfd *dynobj; 1966 asection *s; 1967 bool relocs; 1968 bfd *ibfd; 1969 1970 #ifdef DEBUG_PIC 1971 printf ("m32r_elf_size_dynamic_sections()\n"); 1972 #endif 1973 1974 htab = m32r_elf_hash_table (info); 1975 if (htab == NULL) 1976 return false; 1977 1978 dynobj = htab->dynobj; 1979 BFD_ASSERT (dynobj != NULL); 1980 1981 if (htab->dynamic_sections_created) 1982 { 1983 /* Set the contents of the .interp section to the interpreter. */ 1984 if (bfd_link_executable (info) && !info->nointerp) 1985 { 1986 s = bfd_get_linker_section (dynobj, ".interp"); 1987 BFD_ASSERT (s != NULL); 1988 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 1989 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 1990 } 1991 } 1992 1993 /* Set up .got offsets for local syms, and space for local dynamic 1994 relocs. */ 1995 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 1996 { 1997 bfd_signed_vma *local_got; 1998 bfd_signed_vma *end_local_got; 1999 bfd_size_type locsymcount; 2000 Elf_Internal_Shdr *symtab_hdr; 2001 asection *srel; 2002 2003 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 2004 continue; 2005 2006 for (s = ibfd->sections; s != NULL; s = s->next) 2007 { 2008 struct elf_dyn_relocs *p; 2009 2010 for (p = ((struct elf_dyn_relocs *) 2011 elf_section_data (s)->local_dynrel); 2012 p != NULL; 2013 p = p->next) 2014 { 2015 if (! bfd_is_abs_section (p->sec) 2016 && bfd_is_abs_section (p->sec->output_section)) 2017 { 2018 /* Input section has been discarded, either because 2019 it is a copy of a linkonce section or due to 2020 linker script /DISCARD/, so we'll be discarding 2021 the relocs too. */ 2022 } 2023 else if (p->count != 0) 2024 { 2025 srel = elf_section_data (p->sec)->sreloc; 2026 srel->size += p->count * sizeof (Elf32_External_Rela); 2027 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2028 info->flags |= DF_TEXTREL; 2029 } 2030 } 2031 } 2032 2033 local_got = elf_local_got_refcounts (ibfd); 2034 if (!local_got) 2035 continue; 2036 2037 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2038 locsymcount = symtab_hdr->sh_info; 2039 end_local_got = local_got + locsymcount; 2040 s = htab->sgot; 2041 srel = htab->srelgot; 2042 for (; local_got < end_local_got; ++local_got) 2043 { 2044 if (*local_got > 0) 2045 { 2046 *local_got = s->size; 2047 s->size += 4; 2048 if (bfd_link_pic (info)) 2049 srel->size += sizeof (Elf32_External_Rela); 2050 } 2051 else 2052 *local_got = (bfd_vma) -1; 2053 } 2054 } 2055 2056 /* Allocate global sym .plt and .got entries, and space for global 2057 sym dynamic relocs. */ 2058 elf_link_hash_traverse (htab, allocate_dynrelocs, info); 2059 2060 /* We now have determined the sizes of the various dynamic sections. 2061 Allocate memory for them. */ 2062 relocs = false; 2063 for (s = dynobj->sections; s != NULL; s = s->next) 2064 { 2065 if ((s->flags & SEC_LINKER_CREATED) == 0) 2066 continue; 2067 2068 if (s == htab->splt 2069 || s == htab->sgot 2070 || s == htab->sgotplt 2071 || s == htab->sdynbss) 2072 { 2073 /* Strip this section if we don't need it; see the 2074 comment below. */ 2075 } 2076 else if (startswith (bfd_section_name (s), ".rela")) 2077 { 2078 if (s->size != 0 && s != htab->srelplt) 2079 relocs = true; 2080 2081 /* We use the reloc_count field as a counter if we need 2082 to copy relocs into the output file. */ 2083 s->reloc_count = 0; 2084 } 2085 else 2086 /* It's not one of our sections, so don't allocate space. */ 2087 continue; 2088 2089 if (s->size == 0) 2090 { 2091 /* If we don't need this section, strip it from the 2092 output file. This is mostly to handle .rela.bss and 2093 .rela.plt. We must create both sections in 2094 create_dynamic_sections, because they must be created 2095 before the linker maps input sections to output 2096 sections. The linker does that before 2097 adjust_dynamic_symbol is called, and it is that 2098 function which decides whether anything needs to go 2099 into these sections. */ 2100 s->flags |= SEC_EXCLUDE; 2101 continue; 2102 } 2103 2104 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2105 continue; 2106 2107 /* Allocate memory for the section contents. We use bfd_zalloc 2108 here in case unused entries are not reclaimed before the 2109 section's contents are written out. This should not happen, 2110 but this way if it does, we get a R_M32R_NONE reloc instead 2111 of garbage. */ 2112 s->contents = bfd_zalloc (dynobj, s->size); 2113 if (s->contents == NULL) 2114 return false; 2115 } 2116 2117 return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs); 2118 } 2119 2120 /* Relocate an M32R/D ELF section. 2121 There is some attempt to make this function usable for many architectures, 2122 both for RELA and REL type relocs, if only to serve as a learning tool. 2123 2124 The RELOCATE_SECTION function is called by the new ELF backend linker 2125 to handle the relocations for a section. 2126 2127 The relocs are always passed as Rela structures; if the section 2128 actually uses Rel structures, the r_addend field will always be 2129 zero. 2130 2131 This function is responsible for adjust the section contents as 2132 necessary, and (if using Rela relocs and generating a 2133 relocatable output file) adjusting the reloc addend as 2134 necessary. 2135 2136 This function does not have to worry about setting the reloc 2137 address or the reloc symbol index. 2138 2139 LOCAL_SYMS is a pointer to the swapped in local symbols. 2140 2141 LOCAL_SECTIONS is an array giving the section in the input file 2142 corresponding to the st_shndx field of each local symbol. 2143 2144 The global hash table entry for the global symbols can be found 2145 via elf_sym_hashes (input_bfd). 2146 2147 When generating relocatable output, this function must handle 2148 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 2149 going to be the section symbol corresponding to the output 2150 section, which means that the addend must be adjusted 2151 accordingly. */ 2152 2153 static int 2154 m32r_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, 2155 struct bfd_link_info *info, 2156 bfd *input_bfd, 2157 asection *input_section, 2158 bfd_byte *contents, 2159 Elf_Internal_Rela *relocs, 2160 Elf_Internal_Sym *local_syms, 2161 asection **local_sections) 2162 { 2163 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 2164 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); 2165 Elf_Internal_Rela *rel, *relend; 2166 /* Assume success. */ 2167 bool ret = true; 2168 struct elf_link_hash_table *htab = m32r_elf_hash_table (info); 2169 bfd_vma *local_got_offsets; 2170 asection *sgot, *splt, *sreloc; 2171 bfd_vma high_address = bfd_get_section_limit (input_bfd, input_section); 2172 2173 if (htab == NULL) 2174 return false; 2175 2176 local_got_offsets = elf_local_got_offsets (input_bfd); 2177 2178 sgot = htab->sgot; 2179 splt = htab->splt; 2180 sreloc = NULL; 2181 2182 rel = relocs; 2183 relend = relocs + input_section->reloc_count; 2184 for (; rel < relend; rel++) 2185 { 2186 int r_type; 2187 reloc_howto_type *howto; 2188 unsigned long r_symndx; 2189 struct elf_link_hash_entry *h; 2190 /* We can't modify r_addend here as elf_link_input_bfd has an assert to 2191 ensure it's zero (we use REL relocs, not RELA). Therefore this 2192 should be assigning zero to `addend', but for clarity we use 2193 `r_addend'. */ 2194 bfd_vma addend = rel->r_addend; 2195 bfd_vma offset = rel->r_offset; 2196 bfd_vma relocation; 2197 Elf_Internal_Sym *sym; 2198 asection *sec; 2199 const char *sym_name; 2200 bfd_reloc_status_type r; 2201 const char *errmsg = NULL; 2202 bool use_rel = false; 2203 2204 h = NULL; 2205 r_type = ELF32_R_TYPE (rel->r_info); 2206 if (r_type < 0 || r_type >= (int) R_M32R_max) 2207 { 2208 /* xgettext:c-format */ 2209 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 2210 input_bfd, (int) r_type); 2211 bfd_set_error (bfd_error_bad_value); 2212 ret = false; 2213 continue; 2214 } 2215 2216 if ( r_type == R_M32R_GNU_VTENTRY 2217 || r_type == R_M32R_GNU_VTINHERIT 2218 || r_type == R_M32R_NONE 2219 || r_type == R_M32R_RELA_GNU_VTENTRY 2220 || r_type == R_M32R_RELA_GNU_VTINHERIT) 2221 continue; 2222 2223 if (r_type <= R_M32R_GNU_VTENTRY) 2224 use_rel = true; 2225 2226 howto = m32r_elf_howto_table + r_type; 2227 r_symndx = ELF32_R_SYM (rel->r_info); 2228 2229 sym = NULL; 2230 sec = NULL; 2231 h = NULL; 2232 2233 if (r_symndx < symtab_hdr->sh_info) 2234 { 2235 /* Local symbol. */ 2236 sym = local_syms + r_symndx; 2237 sec = local_sections[r_symndx]; 2238 sym_name = "<local symbol>"; 2239 2240 if (!use_rel) 2241 { 2242 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2243 addend = rel->r_addend; 2244 } 2245 else 2246 { 2247 relocation = (sec->output_section->vma 2248 + sec->output_offset 2249 + sym->st_value); 2250 } 2251 } 2252 else 2253 { 2254 /* External symbol. */ 2255 relocation = 0; 2256 2257 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 2258 2259 if (info->wrap_hash != NULL 2260 && (input_section->flags & SEC_DEBUGGING) != 0) 2261 h = ((struct elf_link_hash_entry *) 2262 unwrap_hash_lookup (info, input_bfd, &h->root)); 2263 2264 while (h->root.type == bfd_link_hash_indirect 2265 || h->root.type == bfd_link_hash_warning) 2266 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2267 sym_name = h->root.root.string; 2268 2269 if (h->root.type == bfd_link_hash_defined 2270 || h->root.type == bfd_link_hash_defweak) 2271 { 2272 bool dyn; 2273 sec = h->root.u.def.section; 2274 2275 dyn = htab->dynamic_sections_created; 2276 sec = h->root.u.def.section; 2277 if (r_type == R_M32R_GOTPC24 2278 || (r_type == R_M32R_GOTPC_HI_ULO 2279 || r_type == R_M32R_GOTPC_HI_SLO 2280 || r_type == R_M32R_GOTPC_LO) 2281 || (r_type == R_M32R_26_PLTREL 2282 && h->plt.offset != (bfd_vma) -1) 2283 || ((r_type == R_M32R_GOT24 2284 || r_type == R_M32R_GOT16_HI_ULO 2285 || r_type == R_M32R_GOT16_HI_SLO 2286 || r_type == R_M32R_GOT16_LO) 2287 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 2288 bfd_link_pic (info), 2289 h) 2290 && (! bfd_link_pic (info) 2291 || (! info->symbolic && h->dynindx != -1) 2292 || !h->def_regular)) 2293 || (bfd_link_pic (info) 2294 && ((! info->symbolic && h->dynindx != -1) 2295 || !h->def_regular) 2296 && (((r_type == R_M32R_16_RELA 2297 || r_type == R_M32R_32_RELA 2298 || r_type == R_M32R_24_RELA 2299 || r_type == R_M32R_HI16_ULO_RELA 2300 || r_type == R_M32R_HI16_SLO_RELA 2301 || r_type == R_M32R_LO16_RELA) 2302 && !h->forced_local) 2303 || r_type == R_M32R_REL32 2304 || r_type == R_M32R_10_PCREL_RELA 2305 || r_type == R_M32R_18_PCREL_RELA 2306 || r_type == R_M32R_26_PCREL_RELA) 2307 && ((input_section->flags & SEC_ALLOC) != 0 2308 /* DWARF will emit R_M32R_16(24,32) relocations 2309 in its sections against symbols defined 2310 externally in shared libraries. We can't do 2311 anything with them here. */ 2312 || ((input_section->flags & SEC_DEBUGGING) != 0 2313 && h->def_dynamic)))) 2314 { 2315 /* In these cases, we don't need the relocation 2316 value. We check specially because in some 2317 obscure cases sec->output_section will be NULL. */ 2318 } 2319 else if (sec->output_section != NULL) 2320 relocation = (h->root.u.def.value 2321 + sec->output_section->vma 2322 + sec->output_offset); 2323 else if (!bfd_link_relocatable (info) 2324 && (_bfd_elf_section_offset (output_bfd, info, 2325 input_section, 2326 rel->r_offset) 2327 != (bfd_vma) -1)) 2328 { 2329 _bfd_error_handler 2330 /* xgettext:c-format */ 2331 (_("%pB(%pA+%#" PRIx64 "): unresolvable %s relocation " 2332 "against symbol `%s'"), 2333 input_bfd, 2334 input_section, 2335 (uint64_t) rel->r_offset, 2336 howto->name, 2337 h->root.root.string); 2338 } 2339 } 2340 else if (h->root.type == bfd_link_hash_undefweak) 2341 ; 2342 else if (info->unresolved_syms_in_objects == RM_IGNORE 2343 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) 2344 ; 2345 else if (!bfd_link_relocatable (info)) 2346 info->callbacks->undefined_symbol 2347 (info, h->root.root.string, input_bfd, input_section, offset, 2348 (info->unresolved_syms_in_objects == RM_DIAGNOSE 2349 && !info->warn_unresolved_syms) 2350 || ELF_ST_VISIBILITY (h->other)); 2351 } 2352 2353 if (sec != NULL && discarded_section (sec)) 2354 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2355 rel, 1, relend, howto, 0, contents); 2356 2357 if (bfd_link_relocatable (info) && !use_rel) 2358 { 2359 /* This is a relocatable link. We don't have to change 2360 anything, unless the reloc is against a section symbol, 2361 in which case we have to adjust according to where the 2362 section symbol winds up in the output section. */ 2363 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) 2364 rel->r_addend += sec->output_offset; 2365 continue; 2366 } 2367 2368 if (bfd_link_relocatable (info) && use_rel) 2369 { 2370 /* This is a relocatable link. We don't have to change 2371 anything, unless the reloc is against a section symbol, 2372 in which case we have to adjust according to where the 2373 section symbol winds up in the output section. */ 2374 if (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION) 2375 continue; 2376 2377 addend += sec->output_offset; 2378 2379 /* If partial_inplace, we need to store any additional addend 2380 back in the section. */ 2381 if (! howto->partial_inplace) 2382 continue; 2383 /* ??? Here is a nice place to call a special_function 2384 like handler. */ 2385 if (r_type != R_M32R_HI16_SLO && r_type != R_M32R_HI16_ULO) 2386 r = _bfd_relocate_contents (howto, input_bfd, 2387 addend, contents + offset); 2388 else 2389 { 2390 Elf_Internal_Rela *lorel; 2391 2392 /* We allow an arbitrary number of HI16 relocs before the 2393 LO16 reloc. This permits gcc to emit the HI and LO relocs 2394 itself. */ 2395 for (lorel = rel + 1; 2396 (lorel < relend 2397 && (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO 2398 || ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO)); 2399 lorel++) 2400 continue; 2401 if (lorel < relend 2402 && ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16) 2403 { 2404 m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel, 2405 contents, addend); 2406 r = bfd_reloc_ok; 2407 } 2408 else 2409 r = _bfd_relocate_contents (howto, input_bfd, 2410 addend, contents + offset); 2411 } 2412 } 2413 else 2414 { 2415 /* Sanity check the address. */ 2416 if (offset > high_address) 2417 { 2418 r = bfd_reloc_outofrange; 2419 goto check_reloc; 2420 } 2421 2422 switch ((int) r_type) 2423 { 2424 case R_M32R_GOTOFF: 2425 /* Relocation is relative to the start of the global offset 2426 table (for ld24 rx, #uimm24). eg access at label+addend 2427 2428 ld24 rx. #label@GOTOFF + addend 2429 sub rx, r12. */ 2430 2431 BFD_ASSERT (sgot != NULL); 2432 2433 relocation = -(relocation - sgot->output_section->vma); 2434 rel->r_addend = -rel->r_addend; 2435 break; 2436 2437 case R_M32R_GOTOFF_HI_ULO: 2438 case R_M32R_GOTOFF_HI_SLO: 2439 case R_M32R_GOTOFF_LO: 2440 BFD_ASSERT (sgot != NULL); 2441 2442 relocation -= sgot->output_section->vma; 2443 2444 if ((r_type == R_M32R_GOTOFF_HI_SLO) 2445 && ((relocation + rel->r_addend) & 0x8000)) 2446 rel->r_addend += 0x10000; 2447 break; 2448 2449 case R_M32R_GOTPC24: 2450 /* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation 2451 ld24 rx,#_GLOBAL_OFFSET_TABLE_ 2452 */ 2453 relocation = sgot->output_section->vma; 2454 break; 2455 2456 case R_M32R_GOTPC_HI_ULO: 2457 case R_M32R_GOTPC_HI_SLO: 2458 case R_M32R_GOTPC_LO: 2459 { 2460 /* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation 2461 bl .+4 2462 seth rx,#high(_GLOBAL_OFFSET_TABLE_) 2463 or3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4) 2464 or 2465 bl .+4 2466 seth rx,#shigh(_GLOBAL_OFFSET_TABLE_) 2467 add3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4) 2468 */ 2469 relocation = sgot->output_section->vma; 2470 relocation -= (input_section->output_section->vma 2471 + input_section->output_offset 2472 + rel->r_offset); 2473 if ((r_type == R_M32R_GOTPC_HI_SLO) 2474 && ((relocation + rel->r_addend) & 0x8000)) 2475 rel->r_addend += 0x10000; 2476 2477 break; 2478 } 2479 case R_M32R_GOT16_HI_ULO: 2480 case R_M32R_GOT16_HI_SLO: 2481 case R_M32R_GOT16_LO: 2482 /* Fall through. */ 2483 case R_M32R_GOT24: 2484 /* Relocation is to the entry for this symbol in the global 2485 offset table. */ 2486 BFD_ASSERT (sgot != NULL); 2487 2488 if (h != NULL) 2489 { 2490 bool dyn; 2491 bfd_vma off; 2492 2493 off = h->got.offset; 2494 BFD_ASSERT (off != (bfd_vma) -1); 2495 2496 dyn = htab->dynamic_sections_created; 2497 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 2498 bfd_link_pic (info), 2499 h) 2500 || (bfd_link_pic (info) 2501 && (info->symbolic 2502 || h->dynindx == -1 2503 || h->forced_local) 2504 && h->def_regular)) 2505 { 2506 /* This is actually a static link, or it is a 2507 -Bsymbolic link and the symbol is defined 2508 locally, or the symbol was forced to be local 2509 because of a version file. We must initialize 2510 this entry in the global offset table. Since the 2511 offset must always be a multiple of 4, we use the 2512 least significant bit to record whether we have 2513 initialized it already. 2514 2515 When doing a dynamic link, we create a .rela.got 2516 relocation entry to initialize the value. This 2517 is done in the finish_dynamic_symbol routine. */ 2518 if ((off & 1) != 0) 2519 off &= ~1; 2520 else 2521 { 2522 bfd_put_32 (output_bfd, relocation, 2523 sgot->contents + off); 2524 h->got.offset |= 1; 2525 } 2526 } 2527 2528 relocation = sgot->output_offset + off; 2529 } 2530 else 2531 { 2532 bfd_vma off; 2533 bfd_byte *loc; 2534 2535 BFD_ASSERT (local_got_offsets != NULL 2536 && local_got_offsets[r_symndx] != (bfd_vma) -1); 2537 2538 off = local_got_offsets[r_symndx]; 2539 2540 /* The offset must always be a multiple of 4. We use 2541 the least significant bit to record whether we have 2542 already processed this entry. */ 2543 if ((off & 1) != 0) 2544 off &= ~1; 2545 else 2546 { 2547 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 2548 2549 if (bfd_link_pic (info)) 2550 { 2551 asection *srelgot; 2552 Elf_Internal_Rela outrel; 2553 2554 /* We need to generate a R_M32R_RELATIVE reloc 2555 for the dynamic linker. */ 2556 srelgot = htab->srelgot; 2557 BFD_ASSERT (srelgot != NULL); 2558 2559 outrel.r_offset = (sgot->output_section->vma 2560 + sgot->output_offset 2561 + off); 2562 outrel.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); 2563 outrel.r_addend = relocation; 2564 loc = srelgot->contents; 2565 loc += srelgot->reloc_count * sizeof (Elf32_External_Rela); 2566 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); 2567 ++srelgot->reloc_count; 2568 } 2569 2570 local_got_offsets[r_symndx] |= 1; 2571 } 2572 2573 relocation = sgot->output_offset + off; 2574 } 2575 if ((r_type == R_M32R_GOT16_HI_SLO) 2576 && ((relocation + rel->r_addend) & 0x8000)) 2577 rel->r_addend += 0x10000; 2578 2579 break; 2580 2581 case R_M32R_26_PLTREL: 2582 /* Relocation is to the entry for this symbol in the 2583 procedure linkage table. */ 2584 2585 /* The native assembler will generate a 26_PLTREL reloc 2586 for a local symbol if you assemble a call from one 2587 section to another when using -K pic. */ 2588 if (h == NULL) 2589 break; 2590 2591 if (h->forced_local) 2592 break; 2593 2594 if (h->plt.offset == (bfd_vma) -1) 2595 /* We didn't make a PLT entry for this symbol. This 2596 happens when statically linking PIC code, or when 2597 using -Bsymbolic. */ 2598 break; 2599 2600 relocation = (splt->output_section->vma 2601 + splt->output_offset 2602 + h->plt.offset); 2603 break; 2604 2605 case R_M32R_HI16_SLO_RELA: 2606 if ((relocation + rel->r_addend) & 0x8000) 2607 rel->r_addend += 0x10000; 2608 /* Fall through. */ 2609 2610 case R_M32R_16_RELA: 2611 case R_M32R_24_RELA: 2612 case R_M32R_32_RELA: 2613 case R_M32R_REL32: 2614 case R_M32R_10_PCREL_RELA: 2615 case R_M32R_18_PCREL_RELA: 2616 case R_M32R_26_PCREL_RELA: 2617 case R_M32R_HI16_ULO_RELA: 2618 case R_M32R_LO16_RELA: 2619 if (bfd_link_pic (info) 2620 && r_symndx != STN_UNDEF 2621 && (input_section->flags & SEC_ALLOC) != 0 2622 && (( r_type != R_M32R_10_PCREL_RELA 2623 && r_type != R_M32R_18_PCREL_RELA 2624 && r_type != R_M32R_26_PCREL_RELA 2625 && r_type != R_M32R_REL32) 2626 || (h != NULL 2627 && h->dynindx != -1 2628 && (! info->symbolic 2629 || !h->def_regular)))) 2630 { 2631 Elf_Internal_Rela outrel; 2632 bool skip, relocate; 2633 bfd_byte *loc; 2634 2635 /* When generating a shared object, these relocations 2636 are copied into the output file to be resolved at run 2637 time. */ 2638 if (sreloc == NULL) 2639 { 2640 sreloc = _bfd_elf_get_dynamic_reloc_section 2641 (input_bfd, input_section, /*rela?*/ true); 2642 if (sreloc == NULL) 2643 return false; 2644 } 2645 2646 skip = false; 2647 relocate = false; 2648 2649 outrel.r_offset = _bfd_elf_section_offset (output_bfd, 2650 info, 2651 input_section, 2652 rel->r_offset); 2653 if (outrel.r_offset == (bfd_vma) -1) 2654 skip = true; 2655 else if (outrel.r_offset == (bfd_vma) -2) 2656 skip = relocate = true; 2657 outrel.r_offset += (input_section->output_section->vma 2658 + input_section->output_offset); 2659 2660 if (skip) 2661 memset (&outrel, 0, sizeof outrel); 2662 else if ( r_type == R_M32R_10_PCREL_RELA 2663 || r_type == R_M32R_18_PCREL_RELA 2664 || r_type == R_M32R_26_PCREL_RELA 2665 || r_type == R_M32R_REL32) 2666 { 2667 BFD_ASSERT (h != NULL && h->dynindx != -1); 2668 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 2669 outrel.r_addend = rel->r_addend; 2670 } 2671 else 2672 { 2673 /* h->dynindx may be -1 if this symbol was marked to 2674 become local. */ 2675 if (h == NULL 2676 || ((info->symbolic || h->dynindx == -1) 2677 && h->def_regular)) 2678 { 2679 relocate = true; 2680 outrel.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); 2681 outrel.r_addend = relocation + rel->r_addend; 2682 } 2683 else 2684 { 2685 BFD_ASSERT (h->dynindx != -1); 2686 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 2687 outrel.r_addend = relocation + rel->r_addend; 2688 } 2689 } 2690 2691 loc = sreloc->contents; 2692 loc += sreloc->reloc_count * sizeof (Elf32_External_Rela); 2693 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); 2694 ++sreloc->reloc_count; 2695 2696 /* If this reloc is against an external symbol, we do 2697 not want to fiddle with the addend. Otherwise, we 2698 need to include the symbol value so that it becomes 2699 an addend for the dynamic reloc. */ 2700 if (! relocate) 2701 continue; 2702 break; 2703 } 2704 else if (r_type != R_M32R_10_PCREL_RELA) 2705 break; 2706 /* Fall through. */ 2707 2708 case (int) R_M32R_10_PCREL : 2709 r = m32r_elf_do_10_pcrel_reloc (input_bfd, howto, input_section, 2710 contents, offset, 2711 sec, relocation, addend); 2712 goto check_reloc; 2713 2714 case (int) R_M32R_HI16_SLO : 2715 case (int) R_M32R_HI16_ULO : 2716 { 2717 Elf_Internal_Rela *lorel; 2718 2719 /* We allow an arbitrary number of HI16 relocs before the 2720 LO16 reloc. This permits gcc to emit the HI and LO relocs 2721 itself. */ 2722 for (lorel = rel + 1; 2723 (lorel < relend 2724 && (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO 2725 || ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO)); 2726 lorel++) 2727 continue; 2728 if (lorel < relend 2729 && ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16) 2730 { 2731 m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel, 2732 contents, relocation + addend); 2733 r = bfd_reloc_ok; 2734 } 2735 else 2736 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 2737 contents, offset, 2738 relocation, addend); 2739 } 2740 2741 goto check_reloc; 2742 2743 case (int) R_M32R_SDA16_RELA: 2744 case (int) R_M32R_SDA16 : 2745 { 2746 const char *name; 2747 2748 BFD_ASSERT (sec != NULL); 2749 name = bfd_section_name (sec); 2750 2751 if ( strcmp (name, ".sdata") == 0 2752 || strcmp (name, ".sbss") == 0 2753 || strcmp (name, ".scommon") == 0) 2754 { 2755 bfd_vma sda_base; 2756 bfd *out_bfd = sec->output_section->owner; 2757 2758 r = m32r_elf_final_sda_base (out_bfd, info, 2759 &errmsg, 2760 &sda_base); 2761 if (r != bfd_reloc_ok) 2762 { 2763 ret = false; 2764 goto check_reloc; 2765 } 2766 2767 /* At this point `relocation' contains the object's 2768 address. */ 2769 relocation -= sda_base; 2770 /* Now it contains the offset from _SDA_BASE_. */ 2771 } 2772 else 2773 { 2774 _bfd_error_handler 2775 /* xgettext:c-format */ 2776 (_("%pB: the target (%s) of an %s relocation" 2777 " is in the wrong section (%pA)"), 2778 input_bfd, 2779 sym_name, 2780 m32r_elf_howto_table[(int) r_type].name, 2781 sec); 2782 /*bfd_set_error (bfd_error_bad_value); ??? why? */ 2783 ret = false; 2784 continue; 2785 } 2786 } 2787 /* Fall through. */ 2788 2789 default : /* OLD_M32R_RELOC */ 2790 2791 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 2792 contents, offset, 2793 relocation, addend); 2794 goto check_reloc; 2795 } 2796 2797 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 2798 contents, rel->r_offset, 2799 relocation, rel->r_addend); 2800 2801 } 2802 2803 check_reloc: 2804 2805 if (r != bfd_reloc_ok) 2806 { 2807 /* FIXME: This should be generic enough to go in a utility. */ 2808 const char *name; 2809 2810 if (h != NULL) 2811 name = h->root.root.string; 2812 else 2813 { 2814 name = (bfd_elf_string_from_elf_section 2815 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 2816 if (name == NULL || *name == '\0') 2817 name = bfd_section_name (sec); 2818 } 2819 2820 if (errmsg != NULL) 2821 goto common_error; 2822 2823 switch (r) 2824 { 2825 case bfd_reloc_overflow: 2826 (*info->callbacks->reloc_overflow) 2827 (info, (h ? &h->root : NULL), name, howto->name, 2828 (bfd_vma) 0, input_bfd, input_section, offset); 2829 break; 2830 2831 case bfd_reloc_undefined: 2832 (*info->callbacks->undefined_symbol) 2833 (info, name, input_bfd, input_section, offset, true); 2834 break; 2835 2836 case bfd_reloc_outofrange: 2837 errmsg = _("internal error: out of range error"); 2838 goto common_error; 2839 2840 case bfd_reloc_notsupported: 2841 errmsg = _("internal error: unsupported relocation error"); 2842 goto common_error; 2843 2844 case bfd_reloc_dangerous: 2845 errmsg = _("internal error: dangerous error"); 2846 goto common_error; 2847 2848 default: 2849 errmsg = _("internal error: unknown error"); 2850 /* fall through */ 2851 2852 common_error: 2853 (*info->callbacks->warning) (info, errmsg, name, input_bfd, 2854 input_section, offset); 2855 break; 2856 } 2857 } 2858 } 2859 2860 return ret; 2861 } 2862 2863 /* Finish up dynamic symbol handling. We set the contents of various 2864 dynamic sections here. */ 2865 2866 static bool 2867 m32r_elf_finish_dynamic_symbol (bfd *output_bfd, 2868 struct bfd_link_info *info, 2869 struct elf_link_hash_entry *h, 2870 Elf_Internal_Sym *sym) 2871 { 2872 struct elf_link_hash_table *htab; 2873 bfd_byte *loc; 2874 2875 #ifdef DEBUG_PIC 2876 printf ("m32r_elf_finish_dynamic_symbol()\n"); 2877 #endif 2878 2879 htab = m32r_elf_hash_table (info); 2880 if (htab == NULL) 2881 return false; 2882 2883 if (h->plt.offset != (bfd_vma) -1) 2884 { 2885 asection *splt; 2886 asection *sgot; 2887 asection *srela; 2888 2889 bfd_vma plt_index; 2890 bfd_vma got_offset; 2891 Elf_Internal_Rela rela; 2892 2893 /* This symbol has an entry in the procedure linkage table. Set 2894 it up. */ 2895 2896 BFD_ASSERT (h->dynindx != -1); 2897 2898 splt = htab->splt; 2899 sgot = htab->sgotplt; 2900 srela = htab->srelplt; 2901 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); 2902 2903 /* Get the index in the procedure linkage table which 2904 corresponds to this symbol. This is the index of this symbol 2905 in all the symbols for which we are making plt entries. The 2906 first entry in the procedure linkage table is reserved. */ 2907 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 2908 2909 /* Get the offset into the .got table of the entry that 2910 corresponds to this function. Each .got entry is 4 bytes. 2911 The first three are reserved. */ 2912 got_offset = (plt_index + 3) * 4; 2913 2914 /* Fill in the entry in the procedure linkage table. */ 2915 if (! bfd_link_pic (info)) 2916 { 2917 bfd_put_32 (output_bfd, 2918 (PLT_ENTRY_WORD0b 2919 + (((sgot->output_section->vma 2920 + sgot->output_offset 2921 + got_offset) >> 16) & 0xffff)), 2922 splt->contents + h->plt.offset); 2923 bfd_put_32 (output_bfd, 2924 (PLT_ENTRY_WORD1b 2925 + ((sgot->output_section->vma 2926 + sgot->output_offset 2927 + got_offset) & 0xffff)), 2928 splt->contents + h->plt.offset + 4); 2929 bfd_put_32 (output_bfd, PLT_ENTRY_WORD2, 2930 splt->contents + h->plt.offset + 8); 2931 bfd_put_32 (output_bfd, 2932 (PLT_ENTRY_WORD3 2933 + plt_index * sizeof (Elf32_External_Rela)), 2934 splt->contents + h->plt.offset + 12); 2935 bfd_put_32 (output_bfd, 2936 (PLT_ENTRY_WORD4 2937 + (((unsigned int) ((- (h->plt.offset + 16)) >> 2)) & 0xffffff)), 2938 splt->contents + h->plt.offset + 16); 2939 } 2940 else 2941 { 2942 bfd_put_32 (output_bfd, 2943 PLT_ENTRY_WORD0 + got_offset, 2944 splt->contents + h->plt.offset); 2945 bfd_put_32 (output_bfd, PLT_ENTRY_WORD1, 2946 splt->contents + h->plt.offset + 4); 2947 bfd_put_32 (output_bfd, PLT_ENTRY_WORD2, 2948 splt->contents + h->plt.offset + 8); 2949 bfd_put_32 (output_bfd, 2950 (PLT_ENTRY_WORD3 2951 + plt_index * sizeof (Elf32_External_Rela)), 2952 splt->contents + h->plt.offset + 12); 2953 bfd_put_32 (output_bfd, 2954 (PLT_ENTRY_WORD4 2955 + (((unsigned int) ((- (h->plt.offset + 16)) >> 2)) & 0xffffff)), 2956 splt->contents + h->plt.offset + 16); 2957 } 2958 2959 /* Fill in the entry in the global offset table. */ 2960 bfd_put_32 (output_bfd, 2961 (splt->output_section->vma 2962 + splt->output_offset 2963 + h->plt.offset 2964 + 12), /* same offset */ 2965 sgot->contents + got_offset); 2966 2967 /* Fill in the entry in the .rela.plt section. */ 2968 rela.r_offset = (sgot->output_section->vma 2969 + sgot->output_offset 2970 + got_offset); 2971 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_JMP_SLOT); 2972 rela.r_addend = 0; 2973 loc = srela->contents; 2974 loc += plt_index * sizeof (Elf32_External_Rela); 2975 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 2976 2977 if (!h->def_regular) 2978 { 2979 /* Mark the symbol as undefined, rather than as defined in 2980 the .plt section. Leave the value alone. */ 2981 sym->st_shndx = SHN_UNDEF; 2982 } 2983 } 2984 2985 if (h->got.offset != (bfd_vma) -1) 2986 { 2987 asection *sgot; 2988 asection *srela; 2989 Elf_Internal_Rela rela; 2990 2991 /* This symbol has an entry in the global offset table. Set it 2992 up. */ 2993 2994 sgot = htab->sgot; 2995 srela = htab->srelgot; 2996 BFD_ASSERT (sgot != NULL && srela != NULL); 2997 2998 rela.r_offset = (sgot->output_section->vma 2999 + sgot->output_offset 3000 + (h->got.offset &~ 1)); 3001 3002 /* If this is a -Bsymbolic link, and the symbol is defined 3003 locally, we just want to emit a RELATIVE reloc. Likewise if 3004 the symbol was forced to be local because of a version file. 3005 The entry in the global offset table will already have been 3006 initialized in the relocate_section function. */ 3007 if (bfd_link_pic (info) 3008 && (info->symbolic 3009 || h->dynindx == -1 3010 || h->forced_local) 3011 && h->def_regular) 3012 { 3013 rela.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); 3014 rela.r_addend = (h->root.u.def.value 3015 + h->root.u.def.section->output_section->vma 3016 + h->root.u.def.section->output_offset); 3017 } 3018 else 3019 { 3020 BFD_ASSERT ((h->got.offset & 1) == 0); 3021 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); 3022 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_GLOB_DAT); 3023 rela.r_addend = 0; 3024 } 3025 3026 loc = srela->contents; 3027 loc += srela->reloc_count * sizeof (Elf32_External_Rela); 3028 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3029 ++srela->reloc_count; 3030 } 3031 3032 if (h->needs_copy) 3033 { 3034 asection *s; 3035 Elf_Internal_Rela rela; 3036 3037 /* This symbols needs a copy reloc. Set it up. */ 3038 3039 BFD_ASSERT (h->dynindx != -1 3040 && (h->root.type == bfd_link_hash_defined 3041 || h->root.type == bfd_link_hash_defweak)); 3042 3043 s = bfd_get_linker_section (htab->dynobj, ".rela.bss"); 3044 BFD_ASSERT (s != NULL); 3045 3046 rela.r_offset = (h->root.u.def.value 3047 + h->root.u.def.section->output_section->vma 3048 + h->root.u.def.section->output_offset); 3049 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_COPY); 3050 rela.r_addend = 0; 3051 loc = s->contents; 3052 loc += s->reloc_count * sizeof (Elf32_External_Rela); 3053 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3054 ++s->reloc_count; 3055 } 3056 3057 /* Mark some specially defined symbols as absolute. */ 3058 if (h == htab->hdynamic || h == htab->hgot) 3059 sym->st_shndx = SHN_ABS; 3060 3061 return true; 3062 } 3063 3064 3065 /* Finish up the dynamic sections. */ 3066 3067 static bool 3068 m32r_elf_finish_dynamic_sections (bfd *output_bfd, 3069 struct bfd_link_info *info) 3070 { 3071 struct elf_link_hash_table *htab; 3072 bfd *dynobj; 3073 asection *sdyn; 3074 asection *sgot; 3075 3076 #ifdef DEBUG_PIC 3077 printf ("m32r_elf_finish_dynamic_sections()\n"); 3078 #endif 3079 3080 htab = m32r_elf_hash_table (info); 3081 if (htab == NULL) 3082 return false; 3083 3084 dynobj = htab->dynobj; 3085 3086 sgot = htab->sgotplt; 3087 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 3088 3089 if (htab->dynamic_sections_created) 3090 { 3091 asection *splt; 3092 Elf32_External_Dyn *dyncon, *dynconend; 3093 3094 BFD_ASSERT (sgot != NULL && sdyn != NULL); 3095 3096 dyncon = (Elf32_External_Dyn *) sdyn->contents; 3097 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 3098 3099 for (; dyncon < dynconend; dyncon++) 3100 { 3101 Elf_Internal_Dyn dyn; 3102 asection *s; 3103 3104 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 3105 3106 switch (dyn.d_tag) 3107 { 3108 default: 3109 break; 3110 3111 case DT_PLTGOT: 3112 s = htab->sgotplt; 3113 goto get_vma; 3114 case DT_JMPREL: 3115 s = htab->srelplt; 3116 get_vma: 3117 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 3118 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3119 break; 3120 3121 case DT_PLTRELSZ: 3122 s = htab->srelplt; 3123 dyn.d_un.d_val = s->size; 3124 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3125 break; 3126 } 3127 } 3128 3129 /* Fill in the first entry in the procedure linkage table. */ 3130 splt = htab->splt; 3131 if (splt && splt->size > 0) 3132 { 3133 if (bfd_link_pic (info)) 3134 { 3135 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents); 3136 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4); 3137 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8); 3138 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12); 3139 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16); 3140 } 3141 else 3142 { 3143 unsigned long addr; 3144 /* addr = .got + 4 */ 3145 addr = sgot->output_section->vma + sgot->output_offset + 4; 3146 bfd_put_32 (output_bfd, 3147 PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), 3148 splt->contents); 3149 bfd_put_32 (output_bfd, 3150 PLT0_ENTRY_WORD1 | (addr & 0xffff), 3151 splt->contents + 4); 3152 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); 3153 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); 3154 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); 3155 } 3156 3157 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 3158 PLT_ENTRY_SIZE; 3159 } 3160 } 3161 3162 /* Fill in the first three entries in the global offset table. */ 3163 if (sgot && sgot->size > 0) 3164 { 3165 if (sdyn == NULL) 3166 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 3167 else 3168 bfd_put_32 (output_bfd, 3169 sdyn->output_section->vma + sdyn->output_offset, 3170 sgot->contents); 3171 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); 3172 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); 3173 3174 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 3175 } 3176 3177 return true; 3178 } 3179 3180 3181 /* Set the right machine number. */ 3182 3183 static bool 3184 m32r_elf_object_p (bfd *abfd) 3185 { 3186 switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH) 3187 { 3188 default: 3189 case E_M32R_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32r); break; 3190 case E_M32RX_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32rx); break; 3191 case E_M32R2_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32r2); break; 3192 } 3193 return true; 3194 } 3195 3196 /* Store the machine number in the flags field. */ 3197 3198 static bool 3199 m32r_elf_final_write_processing (bfd *abfd) 3200 { 3201 unsigned long val; 3202 3203 switch (bfd_get_mach (abfd)) 3204 { 3205 default: 3206 case bfd_mach_m32r: val = E_M32R_ARCH; break; 3207 case bfd_mach_m32rx: val = E_M32RX_ARCH; break; 3208 case bfd_mach_m32r2: val = E_M32R2_ARCH; break; 3209 } 3210 3211 elf_elfheader (abfd)->e_flags &=~ EF_M32R_ARCH; 3212 elf_elfheader (abfd)->e_flags |= val; 3213 return _bfd_elf_final_write_processing (abfd); 3214 } 3215 3216 /* Function to keep M32R specific file flags. */ 3217 3218 static bool 3219 m32r_elf_set_private_flags (bfd *abfd, flagword flags) 3220 { 3221 BFD_ASSERT (!elf_flags_init (abfd) 3222 || elf_elfheader (abfd)->e_flags == flags); 3223 3224 elf_elfheader (abfd)->e_flags = flags; 3225 elf_flags_init (abfd) = true; 3226 return true; 3227 } 3228 3229 /* Merge backend specific data from an object file to the output 3230 object file when linking. */ 3231 3232 static bool 3233 m32r_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 3234 { 3235 bfd *obfd = info->output_bfd; 3236 flagword out_flags; 3237 flagword in_flags; 3238 3239 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour 3240 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 3241 return true; 3242 3243 in_flags = elf_elfheader (ibfd)->e_flags; 3244 out_flags = elf_elfheader (obfd)->e_flags; 3245 3246 if (! elf_flags_init (obfd)) 3247 { 3248 /* If the input is the default architecture then do not 3249 bother setting the flags for the output architecture, 3250 instead allow future merges to do this. If no future 3251 merges ever set these flags then they will retain their 3252 unitialised values, which surprise surprise, correspond 3253 to the default values. */ 3254 if (bfd_get_arch_info (ibfd)->the_default) 3255 return true; 3256 3257 elf_flags_init (obfd) = true; 3258 elf_elfheader (obfd)->e_flags = in_flags; 3259 3260 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) 3261 && bfd_get_arch_info (obfd)->the_default) 3262 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), 3263 bfd_get_mach (ibfd)); 3264 3265 return true; 3266 } 3267 3268 /* Check flag compatibility. */ 3269 if (in_flags == out_flags) 3270 return true; 3271 3272 if ((in_flags & EF_M32R_ARCH) != (out_flags & EF_M32R_ARCH)) 3273 { 3274 if ( ((in_flags & EF_M32R_ARCH) != E_M32R_ARCH) 3275 || ((out_flags & EF_M32R_ARCH) == E_M32R_ARCH) 3276 || ((in_flags & EF_M32R_ARCH) == E_M32R2_ARCH)) 3277 { 3278 _bfd_error_handler 3279 (_("%pB: instruction set mismatch with previous modules"), ibfd); 3280 3281 bfd_set_error (bfd_error_bad_value); 3282 return false; 3283 } 3284 } 3285 3286 return true; 3287 } 3288 3289 /* Display the flags field. */ 3290 3291 static bool 3292 m32r_elf_print_private_bfd_data (bfd *abfd, void * ptr) 3293 { 3294 FILE * file = (FILE *) ptr; 3295 3296 BFD_ASSERT (abfd != NULL && ptr != NULL); 3297 3298 _bfd_elf_print_private_bfd_data (abfd, ptr); 3299 3300 fprintf (file, _("private flags = %lx"), elf_elfheader (abfd)->e_flags); 3301 3302 switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH) 3303 { 3304 default: 3305 case E_M32R_ARCH: fprintf (file, _(": m32r instructions")); break; 3306 case E_M32RX_ARCH: fprintf (file, _(": m32rx instructions")); break; 3307 case E_M32R2_ARCH: fprintf (file, _(": m32r2 instructions")); break; 3308 } 3309 3310 fputc ('\n', file); 3311 3312 return true; 3313 } 3314 3315 static asection * 3316 m32r_elf_gc_mark_hook (asection *sec, 3317 struct bfd_link_info *info, 3318 Elf_Internal_Rela *rel, 3319 struct elf_link_hash_entry *h, 3320 Elf_Internal_Sym *sym) 3321 { 3322 if (h != NULL) 3323 switch (ELF32_R_TYPE (rel->r_info)) 3324 { 3325 case R_M32R_GNU_VTINHERIT: 3326 case R_M32R_GNU_VTENTRY: 3327 case R_M32R_RELA_GNU_VTINHERIT: 3328 case R_M32R_RELA_GNU_VTENTRY: 3329 return NULL; 3330 } 3331 3332 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 3333 } 3334 3335 /* Look through the relocs for a section during the first phase. 3336 Since we don't do .gots or .plts, we just need to consider the 3337 virtual table relocs for gc. */ 3338 3339 static bool 3340 m32r_elf_check_relocs (bfd *abfd, 3341 struct bfd_link_info *info, 3342 asection *sec, 3343 const Elf_Internal_Rela *relocs) 3344 { 3345 Elf_Internal_Shdr *symtab_hdr; 3346 struct elf_link_hash_entry **sym_hashes; 3347 const Elf_Internal_Rela *rel; 3348 const Elf_Internal_Rela *rel_end; 3349 struct elf_link_hash_table *htab; 3350 bfd *dynobj; 3351 asection *sreloc; 3352 3353 if (bfd_link_relocatable (info)) 3354 return true; 3355 3356 sreloc = NULL; 3357 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 3358 sym_hashes = elf_sym_hashes (abfd); 3359 3360 htab = m32r_elf_hash_table (info); 3361 if (htab == NULL) 3362 return false; 3363 3364 dynobj = htab->dynobj; 3365 3366 rel_end = relocs + sec->reloc_count; 3367 for (rel = relocs; rel < rel_end; rel++) 3368 { 3369 int r_type; 3370 struct elf_link_hash_entry *h; 3371 unsigned long r_symndx; 3372 3373 r_symndx = ELF32_R_SYM (rel->r_info); 3374 r_type = ELF32_R_TYPE (rel->r_info); 3375 if (r_symndx < symtab_hdr->sh_info) 3376 h = NULL; 3377 else 3378 { 3379 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3380 while (h->root.type == bfd_link_hash_indirect 3381 || h->root.type == bfd_link_hash_warning) 3382 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3383 } 3384 3385 /* Some relocs require a global offset table. */ 3386 if (htab->sgot == NULL) 3387 { 3388 switch (r_type) 3389 { 3390 case R_M32R_GOT16_HI_ULO: 3391 case R_M32R_GOT16_HI_SLO: 3392 case R_M32R_GOTOFF: 3393 case R_M32R_GOTOFF_HI_ULO: 3394 case R_M32R_GOTOFF_HI_SLO: 3395 case R_M32R_GOTOFF_LO: 3396 case R_M32R_GOT16_LO: 3397 case R_M32R_GOTPC24: 3398 case R_M32R_GOTPC_HI_ULO: 3399 case R_M32R_GOTPC_HI_SLO: 3400 case R_M32R_GOTPC_LO: 3401 case R_M32R_GOT24: 3402 if (dynobj == NULL) 3403 htab->dynobj = dynobj = abfd; 3404 if (!_bfd_elf_create_got_section (dynobj, info)) 3405 return false; 3406 break; 3407 3408 default: 3409 break; 3410 } 3411 } 3412 3413 switch (r_type) 3414 { 3415 case R_M32R_GOT16_HI_ULO: 3416 case R_M32R_GOT16_HI_SLO: 3417 case R_M32R_GOT16_LO: 3418 case R_M32R_GOT24: 3419 3420 if (h != NULL) 3421 h->got.refcount += 1; 3422 else 3423 { 3424 bfd_signed_vma *local_got_refcounts; 3425 3426 /* This is a global offset table entry for a local 3427 symbol. */ 3428 local_got_refcounts = elf_local_got_refcounts (abfd); 3429 if (local_got_refcounts == NULL) 3430 { 3431 bfd_size_type size; 3432 3433 size = symtab_hdr->sh_info; 3434 size *= sizeof (bfd_signed_vma); 3435 local_got_refcounts = bfd_zalloc (abfd, size); 3436 if (local_got_refcounts == NULL) 3437 return false; 3438 elf_local_got_refcounts (abfd) = local_got_refcounts; 3439 } 3440 local_got_refcounts[r_symndx] += 1; 3441 } 3442 break; 3443 3444 case R_M32R_26_PLTREL: 3445 /* This symbol requires a procedure linkage table entry. We 3446 actually build the entry in adjust_dynamic_symbol, 3447 because this might be a case of linking PIC code without 3448 linking in any dynamic objects, in which case we don't 3449 need to generate a procedure linkage table after all. */ 3450 3451 /* If this is a local symbol, we resolve it directly without 3452 creating a procedure linkage table entry. */ 3453 if (h == NULL) 3454 continue; 3455 3456 if (h->forced_local) 3457 break; 3458 3459 h->needs_plt = 1; 3460 h->plt.refcount += 1; 3461 break; 3462 3463 case R_M32R_16_RELA: 3464 case R_M32R_24_RELA: 3465 case R_M32R_32_RELA: 3466 case R_M32R_REL32: 3467 case R_M32R_HI16_ULO_RELA: 3468 case R_M32R_HI16_SLO_RELA: 3469 case R_M32R_LO16_RELA: 3470 case R_M32R_SDA16_RELA: 3471 case R_M32R_10_PCREL_RELA: 3472 case R_M32R_18_PCREL_RELA: 3473 case R_M32R_26_PCREL_RELA: 3474 3475 if (h != NULL && !bfd_link_pic (info)) 3476 { 3477 h->non_got_ref = 1; 3478 h->plt.refcount += 1; 3479 } 3480 3481 /* If we are creating a shared library, and this is a reloc 3482 against a global symbol, or a non PC relative reloc 3483 against a local symbol, then we need to copy the reloc 3484 into the shared library. However, if we are linking with 3485 -Bsymbolic, we do not need to copy a reloc against a 3486 global symbol which is defined in an object we are 3487 including in the link (i.e., DEF_REGULAR is set). At 3488 this point we have not seen all the input files, so it is 3489 possible that DEF_REGULAR is not set now but will be set 3490 later (it is never cleared). We account for that 3491 possibility below by storing information in the 3492 dyn_relocs field of the hash table entry. A similar 3493 situation occurs when creating shared libraries and symbol 3494 visibility changes render the symbol local. 3495 3496 If on the other hand, we are creating an executable, we 3497 may need to keep relocations for symbols satisfied by a 3498 dynamic library if we manage to avoid copy relocs for the 3499 symbol. */ 3500 if ((bfd_link_pic (info) 3501 && (sec->flags & SEC_ALLOC) != 0 3502 && (( r_type != R_M32R_26_PCREL_RELA 3503 && r_type != R_M32R_18_PCREL_RELA 3504 && r_type != R_M32R_10_PCREL_RELA 3505 && r_type != R_M32R_REL32) 3506 || (h != NULL 3507 && (! info->symbolic 3508 || h->root.type == bfd_link_hash_defweak 3509 || !h->def_regular)))) 3510 || (!bfd_link_pic (info) 3511 && (sec->flags & SEC_ALLOC) != 0 3512 && h != NULL 3513 && (h->root.type == bfd_link_hash_defweak 3514 || !h->def_regular))) 3515 { 3516 struct elf_dyn_relocs *p; 3517 struct elf_dyn_relocs **head; 3518 3519 if (dynobj == NULL) 3520 htab->dynobj = dynobj = abfd; 3521 3522 /* When creating a shared object, we must copy these 3523 relocs into the output file. We create a reloc 3524 section in dynobj and make room for the reloc. */ 3525 if (sreloc == NULL) 3526 { 3527 sreloc = _bfd_elf_make_dynamic_reloc_section 3528 (sec, dynobj, 2, abfd, /*rela?*/ true); 3529 3530 if (sreloc == NULL) 3531 return false; 3532 } 3533 3534 /* If this is a global symbol, we count the number of 3535 relocations we need for this symbol. */ 3536 if (h != NULL) 3537 head = &h->dyn_relocs; 3538 else 3539 { 3540 /* Track dynamic relocs needed for local syms too. */ 3541 asection *s; 3542 void *vpp; 3543 Elf_Internal_Sym *isym; 3544 3545 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 3546 abfd, r_symndx); 3547 if (isym == NULL) 3548 return false; 3549 3550 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 3551 if (s == NULL) 3552 s = sec; 3553 3554 vpp = &elf_section_data (s)->local_dynrel; 3555 head = (struct elf_dyn_relocs **) vpp; 3556 } 3557 3558 p = *head; 3559 if (p == NULL || p->sec != sec) 3560 { 3561 size_t amt = sizeof (*p); 3562 3563 p = bfd_alloc (dynobj, amt); 3564 if (p == NULL) 3565 return false; 3566 p->next = *head; 3567 *head = p; 3568 p->sec = sec; 3569 p->count = 0; 3570 p->pc_count = 0; 3571 } 3572 3573 p->count += 1; 3574 if ( ELF32_R_TYPE (rel->r_info) == R_M32R_26_PCREL_RELA 3575 || ELF32_R_TYPE (rel->r_info) == R_M32R_18_PCREL_RELA 3576 || ELF32_R_TYPE (rel->r_info) == R_M32R_10_PCREL_RELA 3577 || ELF32_R_TYPE (rel->r_info) == R_M32R_REL32) 3578 p->pc_count += 1; 3579 } 3580 break; 3581 3582 /* This relocation describes the C++ object vtable hierarchy. 3583 Reconstruct it for later use during GC. */ 3584 case R_M32R_RELA_GNU_VTINHERIT: 3585 case R_M32R_GNU_VTINHERIT: 3586 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 3587 return false; 3588 break; 3589 3590 /* This relocation describes which C++ vtable entries are actually 3591 used. Record for later use during GC. */ 3592 case R_M32R_GNU_VTENTRY: 3593 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) 3594 return false; 3595 break; 3596 case R_M32R_RELA_GNU_VTENTRY: 3597 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 3598 return false; 3599 break; 3600 } 3601 } 3602 3603 return true; 3604 } 3605 3606 static const struct bfd_elf_special_section m32r_elf_special_sections[] = 3607 { 3608 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 3609 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 3610 { NULL, 0, 0, 0, 0 } 3611 }; 3612 3613 static bool 3614 m32r_elf_section_flags (const Elf_Internal_Shdr *hdr) 3615 { 3616 const char *name = hdr->bfd_section->name; 3617 3618 if (startswith (name, ".sbss") 3619 || startswith (name, ".sdata")) 3620 hdr->bfd_section->flags |= SEC_SMALL_DATA; 3621 3622 return true; 3623 } 3624 3625 static enum elf_reloc_type_class 3626 m32r_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 3627 const asection *rel_sec ATTRIBUTE_UNUSED, 3628 const Elf_Internal_Rela *rela) 3629 { 3630 switch ((int) ELF32_R_TYPE (rela->r_info)) 3631 { 3632 case R_M32R_RELATIVE: return reloc_class_relative; 3633 case R_M32R_JMP_SLOT: return reloc_class_plt; 3634 case R_M32R_COPY: return reloc_class_copy; 3635 default: return reloc_class_normal; 3636 } 3637 } 3638 3639 #define ELF_ARCH bfd_arch_m32r 3640 #define ELF_TARGET_ID M32R_ELF_DATA 3641 #define ELF_MACHINE_CODE EM_M32R 3642 #define ELF_MACHINE_ALT1 EM_CYGNUS_M32R 3643 #define ELF_MAXPAGESIZE 0x1 /* Explicitly requested by Mitsubishi. */ 3644 3645 #define TARGET_BIG_SYM m32r_elf32_vec 3646 #define TARGET_BIG_NAME "elf32-m32r" 3647 #define TARGET_LITTLE_SYM m32r_elf32_le_vec 3648 #define TARGET_LITTLE_NAME "elf32-m32rle" 3649 3650 #define elf_info_to_howto m32r_info_to_howto 3651 #define elf_info_to_howto_rel m32r_info_to_howto_rel 3652 #define elf_backend_section_from_bfd_section _bfd_m32r_elf_section_from_bfd_section 3653 #define elf_backend_symbol_processing _bfd_m32r_elf_symbol_processing 3654 #define elf_backend_add_symbol_hook m32r_elf_add_symbol_hook 3655 #define elf_backend_relocate_section m32r_elf_relocate_section 3656 #define elf_backend_gc_mark_hook m32r_elf_gc_mark_hook 3657 #define elf_backend_check_relocs m32r_elf_check_relocs 3658 3659 #define elf_backend_create_dynamic_sections m32r_elf_create_dynamic_sections 3660 #define bfd_elf32_bfd_link_hash_table_create m32r_elf_link_hash_table_create 3661 #define elf_backend_size_dynamic_sections m32r_elf_size_dynamic_sections 3662 #define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all 3663 #define elf_backend_finish_dynamic_sections m32r_elf_finish_dynamic_sections 3664 #define elf_backend_adjust_dynamic_symbol m32r_elf_adjust_dynamic_symbol 3665 #define elf_backend_finish_dynamic_symbol m32r_elf_finish_dynamic_symbol 3666 #define elf_backend_reloc_type_class m32r_elf_reloc_type_class 3667 3668 #define elf_backend_can_gc_sections 1 3669 /*#if !USE_REL 3670 #define elf_backend_rela_normal 1 3671 #endif*/ 3672 #define elf_backend_can_refcount 1 3673 #define elf_backend_want_got_plt 1 3674 #define elf_backend_plt_readonly 1 3675 #define elf_backend_want_plt_sym 0 3676 #define elf_backend_got_header_size 12 3677 #define elf_backend_dtrel_excludes_plt 1 3678 3679 #define elf_backend_may_use_rel_p 1 3680 #ifdef USE_M32R_OLD_RELOC 3681 #define elf_backend_default_use_rela_p 0 3682 #define elf_backend_may_use_rela_p 0 3683 #else 3684 #define elf_backend_default_use_rela_p 1 3685 #define elf_backend_may_use_rela_p 1 3686 #endif 3687 3688 #define elf_backend_object_p m32r_elf_object_p 3689 #define elf_backend_final_write_processing m32r_elf_final_write_processing 3690 #define bfd_elf32_bfd_merge_private_bfd_data m32r_elf_merge_private_bfd_data 3691 #define bfd_elf32_bfd_set_private_flags m32r_elf_set_private_flags 3692 #define bfd_elf32_bfd_print_private_bfd_data m32r_elf_print_private_bfd_data 3693 #define elf_backend_special_sections m32r_elf_special_sections 3694 #define elf_backend_section_flags m32r_elf_section_flags 3695 3696 #define elf_backend_linux_prpsinfo32_ugid16 true 3697 3698 #include "elf32-target.h" 3699 3700 #undef ELF_MAXPAGESIZE 3701 #define ELF_MAXPAGESIZE 0x1000 3702 3703 #undef TARGET_BIG_SYM 3704 #define TARGET_BIG_SYM m32r_elf32_linux_vec 3705 #undef TARGET_BIG_NAME 3706 #define TARGET_BIG_NAME "elf32-m32r-linux" 3707 #undef TARGET_LITTLE_SYM 3708 #define TARGET_LITTLE_SYM m32r_elf32_linux_le_vec 3709 #undef TARGET_LITTLE_NAME 3710 #define TARGET_LITTLE_NAME "elf32-m32rle-linux" 3711 #undef elf32_bed 3712 #define elf32_bed elf32_m32r_lin_bed 3713 3714 #include "elf32-target.h" 3715