elf32-m32r.c revision 1.1.1.9
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. 287 HI16_SLO is for the add3 and load/store with displacement instructions. 288 HI16_ULO is for the or3 instruction. 289 For R_M32R_HI16_SLO, the lower 16 bits are sign extended when added to 290 the high 16 bytes so if the lower 16 bits are negative (bit 15 == 1) then 291 we must add one to the high 16 bytes (which will get subtracted off when 292 the low 16 bits are added). 293 These relocs have to be done in combination with an R_M32R_LO16 reloc 294 because there is a carry from the LO16 to the HI16. Here we just save 295 the information we need; we do the actual relocation when we see the LO16. 296 This code is copied from the elf32-mips.c. We also support an arbitrary 297 number of HI16 relocs to be associated with a single LO16 reloc. The 298 assembler sorts the relocs to ensure each HI16 immediately precedes its 299 LO16. However if there are multiple copies, the assembler may not find 300 the real LO16 so it picks the first one it finds. */ 301 302 struct m32r_hi16 303 { 304 struct m32r_hi16 *next; 305 bfd_byte *addr; 306 bfd_vma addend; 307 }; 308 309 /* FIXME: This should not be a static variable. */ 310 311 static struct m32r_hi16 *m32r_hi16_list; 312 313 static bfd_reloc_status_type 314 m32r_elf_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED, 315 arelent *reloc_entry, 316 asymbol *symbol, 317 void * data, 318 asection *input_section, 319 bfd *output_bfd, 320 char **error_message ATTRIBUTE_UNUSED) 321 { 322 bfd_reloc_status_type ret; 323 bfd_vma relocation; 324 struct m32r_hi16 *n; 325 326 /* This part is from bfd_elf_generic_reloc. 327 If we're relocating, and this an external symbol, we don't want 328 to change anything. */ 329 if (output_bfd != NULL 330 && (symbol->flags & BSF_SECTION_SYM) == 0 331 && reloc_entry->addend == 0) 332 { 333 reloc_entry->address += input_section->output_offset; 334 return bfd_reloc_ok; 335 } 336 337 /* Sanity check the address (offset in section). */ 338 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 339 return bfd_reloc_outofrange; 340 341 ret = bfd_reloc_ok; 342 if (bfd_is_und_section (symbol->section) 343 && output_bfd == NULL) 344 ret = bfd_reloc_undefined; 345 346 if (bfd_is_com_section (symbol->section)) 347 relocation = 0; 348 else 349 relocation = symbol->value; 350 351 relocation += symbol->section->output_section->vma; 352 relocation += symbol->section->output_offset; 353 relocation += reloc_entry->addend; 354 355 /* Save the information, and let LO16 do the actual relocation. */ 356 n = bfd_malloc ((bfd_size_type) sizeof *n); 357 if (n == NULL) 358 return bfd_reloc_outofrange; 359 n->addr = (bfd_byte *) data + reloc_entry->address; 360 n->addend = relocation; 361 n->next = m32r_hi16_list; 362 m32r_hi16_list = n; 363 364 if (output_bfd != NULL) 365 reloc_entry->address += input_section->output_offset; 366 367 return ret; 368 } 369 370 /* Handle an M32R ELF HI16 reloc. */ 371 372 static void 373 m32r_elf_relocate_hi16 (bfd *input_bfd, 374 int type, 375 Elf_Internal_Rela *relhi, 376 Elf_Internal_Rela *rello, 377 bfd_byte *contents, 378 bfd_vma addend) 379 { 380 unsigned long insn; 381 bfd_vma addlo; 382 383 insn = bfd_get_32 (input_bfd, contents + relhi->r_offset); 384 385 addlo = bfd_get_32 (input_bfd, contents + rello->r_offset); 386 if (type == R_M32R_HI16_SLO) 387 addlo = ((addlo & 0xffff) ^ 0x8000) - 0x8000; 388 else 389 addlo &= 0xffff; 390 391 addend += ((insn & 0xffff) << 16) + addlo; 392 393 /* Reaccount for sign extension of low part. */ 394 if (type == R_M32R_HI16_SLO 395 && (addend & 0x8000) != 0) 396 addend += 0x10000; 397 398 bfd_put_32 (input_bfd, 399 (insn & 0xffff0000) | ((addend >> 16) & 0xffff), 400 contents + relhi->r_offset); 401 } 402 403 /* Do an R_M32R_LO16 relocation. This is a straightforward 16 bit 404 inplace relocation; this function exists in order to do the 405 R_M32R_HI16_[SU]LO relocation described above. */ 406 407 static bfd_reloc_status_type 408 m32r_elf_lo16_reloc (bfd *input_bfd, 409 arelent *reloc_entry, 410 asymbol *symbol, 411 void * data, 412 asection *input_section, 413 bfd *output_bfd, 414 char **error_message) 415 { 416 /* This part is from bfd_elf_generic_reloc. 417 If we're relocating, and this an external symbol, we don't want 418 to change anything. */ 419 if (output_bfd != NULL 420 && (symbol->flags & BSF_SECTION_SYM) == 0 421 && reloc_entry->addend == 0) 422 { 423 reloc_entry->address += input_section->output_offset; 424 return bfd_reloc_ok; 425 } 426 427 if (m32r_hi16_list != NULL) 428 { 429 struct m32r_hi16 *l; 430 431 l = m32r_hi16_list; 432 while (l != NULL) 433 { 434 unsigned long insn; 435 unsigned long val; 436 unsigned long vallo; 437 struct m32r_hi16 *next; 438 439 /* Do the HI16 relocation. Note that we actually don't need 440 to know anything about the LO16 itself, except where to 441 find the low 16 bits of the addend needed by the LO16. */ 442 insn = bfd_get_32 (input_bfd, l->addr); 443 vallo = ((bfd_get_32 (input_bfd, (bfd_byte *) data + reloc_entry->address) 444 & 0xffff) ^ 0x8000) - 0x8000; 445 val = ((insn & 0xffff) << 16) + vallo; 446 val += l->addend; 447 448 /* Reaccount for sign extension of low part. */ 449 if ((val & 0x8000) != 0) 450 val += 0x10000; 451 452 insn = (insn &~ (bfd_vma) 0xffff) | ((val >> 16) & 0xffff); 453 bfd_put_32 (input_bfd, (bfd_vma) insn, l->addr); 454 455 next = l->next; 456 free (l); 457 l = next; 458 } 459 460 m32r_hi16_list = NULL; 461 } 462 463 /* Now do the LO16 reloc in the usual way. 464 ??? It would be nice to call bfd_elf_generic_reloc here, 465 but we have partial_inplace set. bfd_elf_generic_reloc will 466 pass the handling back to bfd_install_relocation which will install 467 a section relative addend which is wrong. */ 468 return m32r_elf_generic_reloc (input_bfd, reloc_entry, symbol, data, 469 input_section, output_bfd, error_message); 470 } 471 472 473 static reloc_howto_type m32r_elf_howto_table[] = 475 { 476 /* This reloc does nothing. */ 477 HOWTO (R_M32R_NONE, /* type */ 478 0, /* rightshift */ 479 0, /* size */ 480 0, /* bitsize */ 481 false, /* pc_relative */ 482 0, /* bitpos */ 483 complain_overflow_dont, /* complain_on_overflow */ 484 bfd_elf_generic_reloc, /* special_function */ 485 "R_M32R_NONE", /* name */ 486 false, /* partial_inplace */ 487 0, /* src_mask */ 488 0, /* dst_mask */ 489 false), /* pcrel_offset */ 490 491 /* A 16 bit absolute relocation. */ 492 HOWTO (R_M32R_16, /* type */ 493 0, /* rightshift */ 494 2, /* size */ 495 16, /* bitsize */ 496 false, /* pc_relative */ 497 0, /* bitpos */ 498 complain_overflow_bitfield, /* complain_on_overflow */ 499 m32r_elf_generic_reloc,/* special_function */ 500 "R_M32R_16", /* name */ 501 true, /* partial_inplace */ 502 0xffff, /* src_mask */ 503 0xffff, /* dst_mask */ 504 false), /* pcrel_offset */ 505 506 /* A 32 bit absolute relocation. */ 507 HOWTO (R_M32R_32, /* type */ 508 0, /* rightshift */ 509 4, /* size */ 510 32, /* bitsize */ 511 false, /* pc_relative */ 512 0, /* bitpos */ 513 complain_overflow_bitfield, /* complain_on_overflow */ 514 m32r_elf_generic_reloc,/* special_function */ 515 "R_M32R_32", /* name */ 516 true, /* partial_inplace */ 517 0xffffffff, /* src_mask */ 518 0xffffffff, /* dst_mask */ 519 false), /* pcrel_offset */ 520 521 /* A 24 bit address. */ 522 HOWTO (R_M32R_24, /* type */ 523 0, /* rightshift */ 524 4, /* size */ 525 24, /* bitsize */ 526 false, /* pc_relative */ 527 0, /* bitpos */ 528 complain_overflow_unsigned, /* complain_on_overflow */ 529 m32r_elf_generic_reloc,/* special_function */ 530 "R_M32R_24", /* name */ 531 true, /* partial_inplace */ 532 0xffffff, /* src_mask */ 533 0xffffff, /* dst_mask */ 534 false), /* pcrel_offset */ 535 536 /* An PC Relative 10-bit relocation, shifted by 2. 537 This reloc is complicated because relocations are relative to pc & -4. 538 i.e. branches in the right insn slot use the address of the left insn 539 slot for pc. */ 540 /* ??? It's not clear whether this should have partial_inplace set or not. 541 Branch relaxing in the assembler can store the addend in the insn, 542 and if bfd_install_relocation gets called the addend may get added 543 again. */ 544 HOWTO (R_M32R_10_PCREL, /* type */ 545 2, /* rightshift */ 546 2, /* size */ 547 10, /* bitsize */ 548 true, /* pc_relative */ 549 0, /* bitpos */ 550 complain_overflow_signed, /* complain_on_overflow */ 551 m32r_elf_10_pcrel_reloc, /* special_function */ 552 "R_M32R_10_PCREL", /* name */ 553 false, /* partial_inplace */ 554 0xff, /* src_mask */ 555 0xff, /* dst_mask */ 556 true), /* pcrel_offset */ 557 558 /* A relative 18 bit relocation, right shifted by 2. */ 559 HOWTO (R_M32R_18_PCREL, /* type */ 560 2, /* rightshift */ 561 4, /* size */ 562 16, /* bitsize */ 563 true, /* pc_relative */ 564 0, /* bitpos */ 565 complain_overflow_signed, /* complain_on_overflow */ 566 bfd_elf_generic_reloc, /* special_function */ 567 "R_M32R_18_PCREL", /* name */ 568 false, /* partial_inplace */ 569 0xffff, /* src_mask */ 570 0xffff, /* dst_mask */ 571 true), /* pcrel_offset */ 572 573 /* A relative 26 bit relocation, right shifted by 2. */ 574 /* ??? It's not clear whether this should have partial_inplace set or not. 575 Branch relaxing in the assembler can store the addend in the insn, 576 and if bfd_install_relocation gets called the addend may get added 577 again. */ 578 HOWTO (R_M32R_26_PCREL, /* type */ 579 2, /* rightshift */ 580 4, /* size */ 581 26, /* bitsize */ 582 true, /* pc_relative */ 583 0, /* bitpos */ 584 complain_overflow_signed, /* complain_on_overflow */ 585 bfd_elf_generic_reloc, /* special_function */ 586 "R_M32R_26_PCREL", /* name */ 587 false, /* partial_inplace */ 588 0xffffff, /* src_mask */ 589 0xffffff, /* dst_mask */ 590 true), /* pcrel_offset */ 591 592 /* High 16 bits of address when lower 16 is or'd in. */ 593 HOWTO (R_M32R_HI16_ULO, /* type */ 594 16, /* rightshift */ 595 4, /* size */ 596 16, /* bitsize */ 597 false, /* pc_relative */ 598 0, /* bitpos */ 599 complain_overflow_dont, /* complain_on_overflow */ 600 m32r_elf_hi16_reloc, /* special_function */ 601 "R_M32R_HI16_ULO", /* name */ 602 true, /* partial_inplace */ 603 0x0000ffff, /* src_mask */ 604 0x0000ffff, /* dst_mask */ 605 false), /* pcrel_offset */ 606 607 /* High 16 bits of address when lower 16 is added in. */ 608 HOWTO (R_M32R_HI16_SLO, /* type */ 609 16, /* rightshift */ 610 4, /* size */ 611 16, /* bitsize */ 612 false, /* pc_relative */ 613 0, /* bitpos */ 614 complain_overflow_dont, /* complain_on_overflow */ 615 m32r_elf_hi16_reloc, /* special_function */ 616 "R_M32R_HI16_SLO", /* name */ 617 true, /* partial_inplace */ 618 0x0000ffff, /* src_mask */ 619 0x0000ffff, /* dst_mask */ 620 false), /* pcrel_offset */ 621 622 /* Lower 16 bits of address. */ 623 HOWTO (R_M32R_LO16, /* type */ 624 0, /* rightshift */ 625 4, /* size */ 626 16, /* bitsize */ 627 false, /* pc_relative */ 628 0, /* bitpos */ 629 complain_overflow_dont, /* complain_on_overflow */ 630 m32r_elf_lo16_reloc, /* special_function */ 631 "R_M32R_LO16", /* name */ 632 true, /* partial_inplace */ 633 0x0000ffff, /* src_mask */ 634 0x0000ffff, /* dst_mask */ 635 false), /* pcrel_offset */ 636 637 /* Small data area 16 bits offset. */ 638 HOWTO (R_M32R_SDA16, /* type */ 639 0, /* rightshift */ 640 4, /* size */ 641 16, /* bitsize */ 642 false, /* pc_relative */ 643 0, /* bitpos */ 644 complain_overflow_signed, /* complain_on_overflow */ 645 m32r_elf_sda16_reloc, /* special_function */ 646 "R_M32R_SDA16", /* name */ 647 true, /* partial_inplace */ /* FIXME: correct? */ 648 0x0000ffff, /* src_mask */ 649 0x0000ffff, /* dst_mask */ 650 false), /* pcrel_offset */ 651 652 /* GNU extension to record C++ vtable hierarchy. */ 653 HOWTO (R_M32R_GNU_VTINHERIT, /* type */ 654 0, /* rightshift */ 655 4, /* size */ 656 0, /* bitsize */ 657 false, /* pc_relative */ 658 0, /* bitpos */ 659 complain_overflow_dont, /* complain_on_overflow */ 660 NULL, /* special_function */ 661 "R_M32R_GNU_VTINHERIT", /* name */ 662 false, /* partial_inplace */ 663 0, /* src_mask */ 664 0, /* dst_mask */ 665 false), /* pcrel_offset */ 666 667 /* GNU extension to record C++ vtable member usage. */ 668 HOWTO (R_M32R_GNU_VTENTRY, /* type */ 669 0, /* rightshift */ 670 4, /* size */ 671 0, /* bitsize */ 672 false, /* pc_relative */ 673 0, /* bitpos */ 674 complain_overflow_dont, /* complain_on_overflow */ 675 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 676 "R_M32R_GNU_VTENTRY", /* name */ 677 false, /* partial_inplace */ 678 0, /* src_mask */ 679 0, /* dst_mask */ 680 false), /* pcrel_offset */ 681 682 EMPTY_HOWTO (13), 683 EMPTY_HOWTO (14), 684 EMPTY_HOWTO (15), 685 EMPTY_HOWTO (16), 686 EMPTY_HOWTO (17), 687 EMPTY_HOWTO (18), 688 EMPTY_HOWTO (19), 689 EMPTY_HOWTO (20), 690 EMPTY_HOWTO (21), 691 EMPTY_HOWTO (22), 692 EMPTY_HOWTO (23), 693 EMPTY_HOWTO (24), 694 EMPTY_HOWTO (25), 695 EMPTY_HOWTO (26), 696 EMPTY_HOWTO (27), 697 EMPTY_HOWTO (28), 698 EMPTY_HOWTO (29), 699 EMPTY_HOWTO (30), 700 EMPTY_HOWTO (31), 701 EMPTY_HOWTO (32), 702 703 /* A 16 bit absolute relocation. */ 704 HOWTO (R_M32R_16_RELA, /* type */ 705 0, /* rightshift */ 706 2, /* size */ 707 16, /* bitsize */ 708 false, /* pc_relative */ 709 0, /* bitpos */ 710 complain_overflow_bitfield, /* complain_on_overflow */ 711 bfd_elf_generic_reloc, /* special_function */ 712 "R_M32R_16_RELA", /* name */ 713 false, /* partial_inplace */ 714 0xffff, /* src_mask */ 715 0xffff, /* dst_mask */ 716 false), /* pcrel_offset */ 717 718 /* A 32 bit absolute relocation. */ 719 HOWTO (R_M32R_32_RELA, /* type */ 720 0, /* rightshift */ 721 4, /* size */ 722 32, /* bitsize */ 723 false, /* pc_relative */ 724 0, /* bitpos */ 725 complain_overflow_bitfield, /* complain_on_overflow */ 726 bfd_elf_generic_reloc,/* special_function */ 727 "R_M32R_32_RELA", /* name */ 728 false, /* partial_inplace */ 729 0xffffffff, /* src_mask */ 730 0xffffffff, /* dst_mask */ 731 false), /* pcrel_offset */ 732 733 /* A 24 bit address. */ 734 HOWTO (R_M32R_24_RELA, /* type */ 735 0, /* rightshift */ 736 4, /* size */ 737 24, /* bitsize */ 738 false, /* pc_relative */ 739 0, /* bitpos */ 740 complain_overflow_unsigned, /* complain_on_overflow */ 741 bfd_elf_generic_reloc,/* special_function */ 742 "R_M32R_24_RELA", /* name */ 743 false, /* partial_inplace */ 744 0xffffff, /* src_mask */ 745 0xffffff, /* dst_mask */ 746 false), /* pcrel_offset */ 747 748 HOWTO (R_M32R_10_PCREL_RELA, /* type */ 749 2, /* rightshift */ 750 2, /* size */ 751 10, /* bitsize */ 752 true, /* pc_relative */ 753 0, /* bitpos */ 754 complain_overflow_signed, /* complain_on_overflow */ 755 m32r_elf_10_pcrel_reloc, /* special_function */ 756 "R_M32R_10_PCREL_RELA",/* name */ 757 false, /* partial_inplace */ 758 0xff, /* src_mask */ 759 0xff, /* dst_mask */ 760 true), /* pcrel_offset */ 761 762 /* A relative 18 bit relocation, right shifted by 2. */ 763 HOWTO (R_M32R_18_PCREL_RELA, /* type */ 764 2, /* rightshift */ 765 4, /* size */ 766 16, /* bitsize */ 767 true, /* pc_relative */ 768 0, /* bitpos */ 769 complain_overflow_signed, /* complain_on_overflow */ 770 bfd_elf_generic_reloc, /* special_function */ 771 "R_M32R_18_PCREL_RELA",/* name */ 772 false, /* partial_inplace */ 773 0xffff, /* src_mask */ 774 0xffff, /* dst_mask */ 775 true), /* pcrel_offset */ 776 777 /* A relative 26 bit relocation, right shifted by 2. */ 778 HOWTO (R_M32R_26_PCREL_RELA, /* type */ 779 2, /* rightshift */ 780 4, /* size */ 781 26, /* bitsize */ 782 true, /* pc_relative */ 783 0, /* bitpos */ 784 complain_overflow_signed, /* complain_on_overflow */ 785 bfd_elf_generic_reloc, /* special_function */ 786 "R_M32R_26_PCREL_RELA",/* name */ 787 false, /* partial_inplace */ 788 0xffffff, /* src_mask */ 789 0xffffff, /* dst_mask */ 790 true), /* pcrel_offset */ 791 792 /* High 16 bits of address when lower 16 is or'd in. */ 793 HOWTO (R_M32R_HI16_ULO_RELA, /* type */ 794 16, /* rightshift */ 795 4, /* size */ 796 16, /* bitsize */ 797 false, /* pc_relative */ 798 0, /* bitpos */ 799 complain_overflow_dont, /* complain_on_overflow */ 800 bfd_elf_generic_reloc, /* special_function */ 801 "R_M32R_HI16_ULO_RELA",/* name */ 802 false, /* partial_inplace */ 803 0x0000ffff, /* src_mask */ 804 0x0000ffff, /* dst_mask */ 805 false), /* pcrel_offset */ 806 807 /* High 16 bits of address when lower 16 is added in. */ 808 HOWTO (R_M32R_HI16_SLO_RELA, /* type */ 809 16, /* rightshift */ 810 4, /* size */ 811 16, /* bitsize */ 812 false, /* pc_relative */ 813 0, /* bitpos */ 814 complain_overflow_dont, /* complain_on_overflow */ 815 bfd_elf_generic_reloc, /* special_function */ 816 "R_M32R_HI16_SLO_RELA",/* name */ 817 false, /* partial_inplace */ 818 0x0000ffff, /* src_mask */ 819 0x0000ffff, /* dst_mask */ 820 false), /* pcrel_offset */ 821 822 /* Lower 16 bits of address. */ 823 HOWTO (R_M32R_LO16_RELA, /* type */ 824 0, /* rightshift */ 825 4, /* size */ 826 16, /* bitsize */ 827 false, /* pc_relative */ 828 0, /* bitpos */ 829 complain_overflow_dont, /* complain_on_overflow */ 830 bfd_elf_generic_reloc, /* special_function */ 831 "R_M32R_LO16_RELA", /* name */ 832 false, /* partial_inplace */ 833 0x0000ffff, /* src_mask */ 834 0x0000ffff, /* dst_mask */ 835 false), /* pcrel_offset */ 836 837 /* Small data area 16 bits offset. */ 838 HOWTO (R_M32R_SDA16_RELA, /* type */ 839 0, /* rightshift */ 840 4, /* size */ 841 16, /* bitsize */ 842 false, /* pc_relative */ 843 0, /* bitpos */ 844 complain_overflow_signed, /* complain_on_overflow */ 845 bfd_elf_generic_reloc, /* special_function */ 846 "R_M32R_SDA16_RELA", /* name */ 847 true, /* partial_inplace */ /* FIXME: correct? */ 848 0x0000ffff, /* src_mask */ 849 0x0000ffff, /* dst_mask */ 850 false), /* pcrel_offset */ 851 852 /* GNU extension to record C++ vtable hierarchy. */ 853 HOWTO (R_M32R_RELA_GNU_VTINHERIT, /* type */ 854 0, /* rightshift */ 855 4, /* size */ 856 0, /* bitsize */ 857 false, /* pc_relative */ 858 0, /* bitpos */ 859 complain_overflow_dont, /* complain_on_overflow */ 860 NULL, /* special_function */ 861 "R_M32R_RELA_GNU_VTINHERIT", /* name */ 862 false, /* partial_inplace */ 863 0, /* src_mask */ 864 0, /* dst_mask */ 865 false), /* pcrel_offset */ 866 867 /* GNU extension to record C++ vtable member usage. */ 868 HOWTO (R_M32R_RELA_GNU_VTENTRY, /* type */ 869 0, /* rightshift */ 870 4, /* size */ 871 0, /* bitsize */ 872 false, /* pc_relative */ 873 0, /* bitpos */ 874 complain_overflow_dont, /* complain_on_overflow */ 875 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 876 "R_M32R_RELA_GNU_VTENTRY", /* name */ 877 false, /* partial_inplace */ 878 0, /* src_mask */ 879 0, /* dst_mask */ 880 false), /* pcrel_offset */ 881 882 /* A 32 bit PC relative relocation. */ 883 HOWTO (R_M32R_REL32, /* type */ 884 0, /* rightshift */ 885 4, /* size */ 886 32, /* bitsize */ 887 true, /* pc_relative */ 888 0, /* bitpos */ 889 complain_overflow_bitfield, /* complain_on_overflow */ 890 bfd_elf_generic_reloc,/* special_function */ 891 "R_M32R_REL32", /* name */ 892 false, /* partial_inplace */ 893 0xffffffff, /* src_mask */ 894 0xffffffff, /* dst_mask */ 895 true), /* pcrel_offset */ 896 897 EMPTY_HOWTO (46), 898 EMPTY_HOWTO (47), 899 900 /* Like R_M32R_24, but referring to the GOT table entry for 901 the symbol. */ 902 HOWTO (R_M32R_GOT24, /* type */ 903 0, /* rightshift */ 904 4, /* size */ 905 24, /* bitsize */ 906 false, /* pc_relative */ 907 0, /* bitpos */ 908 complain_overflow_unsigned, /* complain_on_overflow */ 909 bfd_elf_generic_reloc, /* special_function */ 910 "R_M32R_GOT24", /* name */ 911 false, /* partial_inplace */ 912 0xffffff, /* src_mask */ 913 0xffffff, /* dst_mask */ 914 false), /* pcrel_offset */ 915 916 /* Like R_M32R_PCREL, but referring to the procedure linkage table 917 entry for the symbol. */ 918 HOWTO (R_M32R_26_PLTREL, /* type */ 919 2, /* rightshift */ 920 4, /* size */ 921 24, /* bitsize */ 922 true, /* pc_relative */ 923 0, /* bitpos */ 924 complain_overflow_signed, /* complain_on_overflow */ 925 bfd_elf_generic_reloc, /* special_function */ 926 "R_M32R_26_PLTREL", /* name */ 927 false, /* partial_inplace */ 928 0xffffff, /* src_mask */ 929 0xffffff, /* dst_mask */ 930 true), /* pcrel_offset */ 931 932 /* This is used only by the dynamic linker. The symbol should exist 933 both in the object being run and in some shared library. The 934 dynamic linker copies the data addressed by the symbol from the 935 shared library into the object, because the object being 936 run has to have the data at some particular address. */ 937 HOWTO (R_M32R_COPY, /* type */ 938 0, /* rightshift */ 939 4, /* size */ 940 32, /* bitsize */ 941 false, /* pc_relative */ 942 0, /* bitpos */ 943 complain_overflow_bitfield, /* complain_on_overflow */ 944 bfd_elf_generic_reloc, /* special_function */ 945 "R_M32R_COPY", /* name */ 946 false, /* partial_inplace */ 947 0xffffffff, /* src_mask */ 948 0xffffffff, /* dst_mask */ 949 false), /* pcrel_offset */ 950 951 /* Like R_M32R_24, but used when setting global offset table 952 entries. */ 953 HOWTO (R_M32R_GLOB_DAT, /* type */ 954 0, /* rightshift */ 955 4, /* size */ 956 32, /* bitsize */ 957 false, /* pc_relative */ 958 0, /* bitpos */ 959 complain_overflow_bitfield, /* complain_on_overflow */ 960 bfd_elf_generic_reloc, /* special_function */ 961 "R_M32R_GLOB_DAT", /* name */ 962 false, /* partial_inplace */ 963 0xffffffff, /* src_mask */ 964 0xffffffff, /* dst_mask */ 965 false), /* pcrel_offset */ 966 967 /* Marks a procedure linkage table entry for a symbol. */ 968 HOWTO (R_M32R_JMP_SLOT, /* type */ 969 0, /* rightshift */ 970 4, /* size */ 971 32, /* bitsize */ 972 false, /* pc_relative */ 973 0, /* bitpos */ 974 complain_overflow_bitfield, /* complain_on_overflow */ 975 bfd_elf_generic_reloc, /* special_function */ 976 "R_M32R_JMP_SLOT", /* name */ 977 false, /* partial_inplace */ 978 0xffffffff, /* src_mask */ 979 0xffffffff, /* dst_mask */ 980 false), /* pcrel_offset */ 981 982 /* Used only by the dynamic linker. When the object is run, this 983 longword is set to the load address of the object, plus the 984 addend. */ 985 HOWTO (R_M32R_RELATIVE, /* type */ 986 0, /* rightshift */ 987 4, /* size */ 988 32, /* bitsize */ 989 false, /* pc_relative */ 990 0, /* bitpos */ 991 complain_overflow_bitfield, /* complain_on_overflow */ 992 bfd_elf_generic_reloc, /* special_function */ 993 "R_M32R_RELATIVE", /* name */ 994 false, /* partial_inplace */ 995 0xffffffff, /* src_mask */ 996 0xffffffff, /* dst_mask */ 997 false), /* pcrel_offset */ 998 999 HOWTO (R_M32R_GOTOFF, /* type */ 1000 0, /* rightshift */ 1001 4, /* size */ 1002 24, /* bitsize */ 1003 false, /* pc_relative */ 1004 0, /* bitpos */ 1005 complain_overflow_bitfield, /* complain_on_overflow */ 1006 bfd_elf_generic_reloc, /* special_function */ 1007 "R_M32R_GOTOFF", /* name */ 1008 false, /* partial_inplace */ 1009 0xffffff, /* src_mask */ 1010 0xffffff, /* dst_mask */ 1011 false), /* pcrel_offset */ 1012 1013 /* An PC Relative 24-bit relocation used when setting PIC offset 1014 table register. */ 1015 HOWTO (R_M32R_GOTPC24, /* type */ 1016 0, /* rightshift */ 1017 4, /* size */ 1018 24, /* bitsize */ 1019 true, /* pc_relative */ 1020 0, /* bitpos */ 1021 complain_overflow_unsigned, /* complain_on_overflow */ 1022 bfd_elf_generic_reloc, /* special_function */ 1023 "R_M32R_GOTPC24", /* name */ 1024 false, /* partial_inplace */ 1025 0xffffff, /* src_mask */ 1026 0xffffff, /* dst_mask */ 1027 true), /* pcrel_offset */ 1028 1029 /* Like R_M32R_HI16_ULO, but referring to the GOT table entry for 1030 the symbol. */ 1031 HOWTO (R_M32R_GOT16_HI_ULO, /* type */ 1032 16, /* rightshift */ 1033 4, /* size */ 1034 16, /* bitsize */ 1035 false, /* pc_relative */ 1036 0, /* bitpos */ 1037 complain_overflow_dont, /* complain_on_overflow */ 1038 bfd_elf_generic_reloc, /* special_function */ 1039 "R_M32R_GOT16_HI_ULO", /* name */ 1040 false, /* partial_inplace */ 1041 0x0000ffff, /* src_mask */ 1042 0x0000ffff, /* dst_mask */ 1043 false), /* pcrel_offset */ 1044 1045 /* Like R_M32R_HI16_SLO, but referring to the GOT table entry for 1046 the symbol. */ 1047 HOWTO (R_M32R_GOT16_HI_SLO, /* type */ 1048 16, /* rightshift */ 1049 4, /* size */ 1050 16, /* bitsize */ 1051 false, /* pc_relative */ 1052 0, /* bitpos */ 1053 complain_overflow_dont, /* complain_on_overflow */ 1054 bfd_elf_generic_reloc, /* special_function */ 1055 "R_M32R_GOT16_HI_SLO", /* name */ 1056 false, /* partial_inplace */ 1057 0x0000ffff, /* src_mask */ 1058 0x0000ffff, /* dst_mask */ 1059 false), /* pcrel_offset */ 1060 1061 /* Like R_M32R_LO16, but referring to the GOT table entry for 1062 the symbol. */ 1063 HOWTO (R_M32R_GOT16_LO, /* type */ 1064 0, /* rightshift */ 1065 4, /* size */ 1066 16, /* bitsize */ 1067 false, /* pc_relative */ 1068 0, /* bitpos */ 1069 complain_overflow_dont, /* complain_on_overflow */ 1070 bfd_elf_generic_reloc, /* special_function */ 1071 "R_M32R_GOT16_LO", /* name */ 1072 false, /* partial_inplace */ 1073 0x0000ffff, /* src_mask */ 1074 0x0000ffff, /* dst_mask */ 1075 false), /* pcrel_offset */ 1076 1077 /* An PC Relative relocation used when setting PIC offset table register. 1078 Like R_M32R_HI16_ULO, but referring to the GOT table entry for 1079 the symbol. */ 1080 HOWTO (R_M32R_GOTPC_HI_ULO, /* type */ 1081 16, /* rightshift */ 1082 4, /* size */ 1083 16, /* bitsize */ 1084 false, /* pc_relative */ 1085 0, /* bitpos */ 1086 complain_overflow_dont, /* complain_on_overflow */ 1087 bfd_elf_generic_reloc, /* special_function */ 1088 "R_M32R_GOTPC_HI_ULO", /* name */ 1089 false, /* partial_inplace */ 1090 0x0000ffff, /* src_mask */ 1091 0x0000ffff, /* dst_mask */ 1092 true), /* pcrel_offset */ 1093 1094 /* An PC Relative relocation used when setting PIC offset table register. 1095 Like R_M32R_HI16_SLO, but referring to the GOT table entry for 1096 the symbol. */ 1097 HOWTO (R_M32R_GOTPC_HI_SLO, /* type */ 1098 16, /* rightshift */ 1099 4, /* size */ 1100 16, /* bitsize */ 1101 false, /* pc_relative */ 1102 0, /* bitpos */ 1103 complain_overflow_dont, /* complain_on_overflow */ 1104 bfd_elf_generic_reloc, /* special_function */ 1105 "R_M32R_GOTPC_HI_SLO", /* name */ 1106 false, /* partial_inplace */ 1107 0x0000ffff, /* src_mask */ 1108 0x0000ffff, /* dst_mask */ 1109 true), /* pcrel_offset */ 1110 1111 /* An PC Relative relocation used when setting PIC offset table register. 1112 Like R_M32R_LO16, but referring to the GOT table entry for 1113 the symbol. */ 1114 HOWTO (R_M32R_GOTPC_LO, /* type */ 1115 0, /* rightshift */ 1116 4, /* size */ 1117 16, /* bitsize */ 1118 false, /* pc_relative */ 1119 0, /* bitpos */ 1120 complain_overflow_dont, /* complain_on_overflow */ 1121 bfd_elf_generic_reloc, /* special_function */ 1122 "R_M32R_GOTPC_LO", /* name */ 1123 false, /* partial_inplace */ 1124 0x0000ffff, /* src_mask */ 1125 0x0000ffff, /* dst_mask */ 1126 true), /* pcrel_offset */ 1127 1128 HOWTO (R_M32R_GOTOFF_HI_ULO, /* type */ 1129 16, /* rightshift */ 1130 4, /* size */ 1131 16, /* bitsize */ 1132 false, /* pc_relative */ 1133 0, /* bitpos */ 1134 complain_overflow_dont, /* complain_on_overflow */ 1135 bfd_elf_generic_reloc, /* special_function */ 1136 "R_M32R_GOTOFF_HI_ULO",/* name */ 1137 false, /* partial_inplace */ 1138 0x0000ffff, /* src_mask */ 1139 0x0000ffff, /* dst_mask */ 1140 false), /* pcrel_offset */ 1141 1142 HOWTO (R_M32R_GOTOFF_HI_SLO, /* type */ 1143 16, /* rightshift */ 1144 4, /* size */ 1145 16, /* bitsize */ 1146 false, /* pc_relative */ 1147 0, /* bitpos */ 1148 complain_overflow_dont, /* complain_on_overflow */ 1149 bfd_elf_generic_reloc, /* special_function */ 1150 "R_M32R_GOTOFF_HI_SLO",/* name */ 1151 false, /* partial_inplace */ 1152 0x0000ffff, /* src_mask */ 1153 0x0000ffff, /* dst_mask */ 1154 false), /* pcrel_offset */ 1155 1156 HOWTO (R_M32R_GOTOFF_LO, /* type */ 1157 0, /* rightshift */ 1158 4, /* size */ 1159 16, /* bitsize */ 1160 false, /* pc_relative */ 1161 0, /* bitpos */ 1162 complain_overflow_dont, /* complain_on_overflow */ 1163 bfd_elf_generic_reloc, /* special_function */ 1164 "R_M32R_GOTOFF_LO", /* name */ 1165 false, /* partial_inplace */ 1166 0x0000ffff, /* src_mask */ 1167 0x0000ffff, /* dst_mask */ 1168 false), /* pcrel_offset */ 1169 }; 1170 1171 /* Map BFD reloc types to M32R ELF reloc types. */ 1172 1173 struct m32r_reloc_map 1174 { 1175 bfd_reloc_code_real_type bfd_reloc_val; 1176 unsigned char elf_reloc_val; 1177 }; 1178 1179 #ifdef USE_M32R_OLD_RELOC 1180 static const struct m32r_reloc_map m32r_reloc_map_old[] = 1181 { 1182 { BFD_RELOC_NONE, R_M32R_NONE }, 1183 { BFD_RELOC_16, R_M32R_16 }, 1184 { BFD_RELOC_32, R_M32R_32 }, 1185 { BFD_RELOC_M32R_24, R_M32R_24 }, 1186 { BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL }, 1187 { BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL }, 1188 { BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL }, 1189 { BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO }, 1190 { BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO }, 1191 { BFD_RELOC_M32R_LO16, R_M32R_LO16 }, 1192 { BFD_RELOC_M32R_SDA16, R_M32R_SDA16 }, 1193 { BFD_RELOC_VTABLE_INHERIT, R_M32R_GNU_VTINHERIT }, 1194 { BFD_RELOC_VTABLE_ENTRY, R_M32R_GNU_VTENTRY }, 1195 }; 1196 #else 1197 static const struct m32r_reloc_map m32r_reloc_map[] = 1198 { 1199 { BFD_RELOC_NONE, R_M32R_NONE }, 1200 { BFD_RELOC_16, R_M32R_16_RELA }, 1201 { BFD_RELOC_32, R_M32R_32_RELA }, 1202 { BFD_RELOC_M32R_24, R_M32R_24_RELA }, 1203 { BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL_RELA }, 1204 { BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL_RELA }, 1205 { BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL_RELA }, 1206 { BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO_RELA }, 1207 { BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO_RELA }, 1208 { BFD_RELOC_M32R_LO16, R_M32R_LO16_RELA }, 1209 { BFD_RELOC_M32R_SDA16, R_M32R_SDA16_RELA }, 1210 { BFD_RELOC_VTABLE_INHERIT, R_M32R_RELA_GNU_VTINHERIT }, 1211 { BFD_RELOC_VTABLE_ENTRY, R_M32R_RELA_GNU_VTENTRY }, 1212 { BFD_RELOC_32_PCREL, R_M32R_REL32 }, 1213 1214 { BFD_RELOC_M32R_GOT24, R_M32R_GOT24 }, 1215 { BFD_RELOC_M32R_26_PLTREL, R_M32R_26_PLTREL }, 1216 { BFD_RELOC_M32R_COPY, R_M32R_COPY }, 1217 { BFD_RELOC_M32R_GLOB_DAT, R_M32R_GLOB_DAT }, 1218 { BFD_RELOC_M32R_JMP_SLOT, R_M32R_JMP_SLOT }, 1219 { BFD_RELOC_M32R_RELATIVE, R_M32R_RELATIVE }, 1220 { BFD_RELOC_M32R_GOTOFF, R_M32R_GOTOFF }, 1221 { BFD_RELOC_M32R_GOTPC24, R_M32R_GOTPC24 }, 1222 { BFD_RELOC_M32R_GOT16_HI_ULO, R_M32R_GOT16_HI_ULO }, 1223 { BFD_RELOC_M32R_GOT16_HI_SLO, R_M32R_GOT16_HI_SLO }, 1224 { BFD_RELOC_M32R_GOT16_LO, R_M32R_GOT16_LO }, 1225 { BFD_RELOC_M32R_GOTPC_HI_ULO, R_M32R_GOTPC_HI_ULO }, 1226 { BFD_RELOC_M32R_GOTPC_HI_SLO, R_M32R_GOTPC_HI_SLO }, 1227 { BFD_RELOC_M32R_GOTPC_LO, R_M32R_GOTPC_LO }, 1228 { BFD_RELOC_M32R_GOTOFF_HI_ULO, R_M32R_GOTOFF_HI_ULO }, 1229 { BFD_RELOC_M32R_GOTOFF_HI_SLO, R_M32R_GOTOFF_HI_SLO }, 1230 { BFD_RELOC_M32R_GOTOFF_LO, R_M32R_GOTOFF_LO }, 1231 }; 1232 #endif 1233 1234 static reloc_howto_type * 1235 bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1236 bfd_reloc_code_real_type code) 1237 { 1238 unsigned int i; 1239 1240 #ifdef USE_M32R_OLD_RELOC 1241 for (i = 0; 1242 i < sizeof (m32r_reloc_map_old) / sizeof (struct m32r_reloc_map); 1243 i++) 1244 if (m32r_reloc_map_old[i].bfd_reloc_val == code) 1245 return &m32r_elf_howto_table[m32r_reloc_map_old[i].elf_reloc_val]; 1246 1247 #else /* ! USE_M32R_OLD_RELOC */ 1248 1249 for (i = 0; 1250 i < sizeof (m32r_reloc_map) / sizeof (struct m32r_reloc_map); 1251 i++) 1252 if (m32r_reloc_map[i].bfd_reloc_val == code) 1253 return &m32r_elf_howto_table[m32r_reloc_map[i].elf_reloc_val]; 1254 #endif 1255 1256 return NULL; 1257 } 1258 1259 static reloc_howto_type * 1260 bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1261 const char *r_name) 1262 { 1263 unsigned int i; 1264 1265 for (i = 0; 1266 i < sizeof (m32r_elf_howto_table) / sizeof (m32r_elf_howto_table[0]); 1267 i++) 1268 if (m32r_elf_howto_table[i].name != NULL 1269 && strcasecmp (m32r_elf_howto_table[i].name, r_name) == 0) 1270 return &m32r_elf_howto_table[i]; 1271 1272 return NULL; 1273 } 1274 1275 /* Set the howto pointer for an M32R ELF reloc. */ 1276 1277 static bool 1278 m32r_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, 1279 arelent *cache_ptr, 1280 Elf_Internal_Rela *dst) 1281 { 1282 unsigned int r_type; 1283 1284 r_type = ELF32_R_TYPE (dst->r_info); 1285 if (r_type > (unsigned int) R_M32R_GNU_VTENTRY) 1286 { 1287 /* xgettext:c-format */ 1288 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 1289 abfd, r_type); 1290 bfd_set_error (bfd_error_bad_value); 1291 return false; 1292 } 1293 cache_ptr->howto = &m32r_elf_howto_table[r_type]; 1294 return true; 1295 } 1296 1297 static bool 1298 m32r_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 1299 arelent *cache_ptr, 1300 Elf_Internal_Rela *dst) 1301 { 1302 unsigned int r_type = ELF32_R_TYPE (dst->r_info); 1303 1304 if (r_type == (unsigned int) R_M32R_NONE 1305 || ((r_type > (unsigned int) R_M32R_GNU_VTENTRY) 1306 && (r_type < (unsigned int) R_M32R_max))) 1307 { 1308 cache_ptr->howto = &m32r_elf_howto_table[r_type]; 1309 return true; 1310 } 1311 1312 /* xgettext:c-format */ 1313 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, r_type); 1314 bfd_set_error (bfd_error_bad_value); 1315 return false; 1316 } 1317 1318 1319 /* Given a BFD section, try to locate the corresponding ELF section 1321 index. */ 1322 1323 static bool 1324 _bfd_m32r_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, 1325 asection *sec, 1326 int *retval) 1327 { 1328 if (strcmp (bfd_section_name (sec), ".scommon") == 0) 1329 { 1330 *retval = SHN_M32R_SCOMMON; 1331 return true; 1332 } 1333 return false; 1334 } 1335 1336 /* M32R ELF uses two common sections. One is the usual one, and the other 1337 is for small objects. All the small objects are kept together, and then 1338 referenced via one register, which yields faster assembler code. It is 1339 up to the compiler to emit an instruction to load the register with 1340 _SDA_BASE. This is what we use for the small common section. This 1341 approach is copied from elf32-mips.c. */ 1342 static asection m32r_elf_scom_section; 1343 static const asymbol m32r_elf_scom_symbol = 1344 GLOBAL_SYM_INIT (".scommon", &m32r_elf_scom_section); 1345 static asection m32r_elf_scom_section = 1346 BFD_FAKE_SECTION (m32r_elf_scom_section, &m32r_elf_scom_symbol, 1347 ".scommon", 0, SEC_IS_COMMON | SEC_SMALL_DATA); 1348 1349 /* Handle the special M32R section numbers that a symbol may use. */ 1350 1351 static void 1352 _bfd_m32r_elf_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *asym) 1353 { 1354 elf_symbol_type *elfsym = (elf_symbol_type *) asym; 1355 1356 switch (elfsym->internal_elf_sym.st_shndx) 1357 { 1358 case SHN_M32R_SCOMMON: 1359 asym->section = &m32r_elf_scom_section; 1360 asym->value = elfsym->internal_elf_sym.st_size; 1361 break; 1362 } 1363 } 1364 1365 /* Hook called by the linker routine which adds symbols from an object 1366 file. We must handle the special M32R section numbers here. 1367 We also keep watching for whether we need to create the sdata special 1368 linker sections. */ 1369 1370 static bool 1371 m32r_elf_add_symbol_hook (bfd *abfd, 1372 struct bfd_link_info *info, 1373 Elf_Internal_Sym *sym, 1374 const char **namep, 1375 flagword *flagsp ATTRIBUTE_UNUSED, 1376 asection **secp, 1377 bfd_vma *valp) 1378 { 1379 if (! bfd_link_relocatable (info) 1380 && (*namep)[0] == '_' && (*namep)[1] == 'S' 1381 && strcmp (*namep, "_SDA_BASE_") == 0 1382 && is_elf_hash_table (info->hash)) 1383 { 1384 /* This is simpler than using _bfd_elf_create_linker_section 1385 (our needs are simpler than ppc's needs). Also 1386 _bfd_elf_create_linker_section currently has a bug where if a .sdata 1387 section already exists a new one is created that follows it which 1388 screws of _SDA_BASE_ address calcs because output_offset != 0. */ 1389 struct elf_link_hash_entry *h; 1390 struct bfd_link_hash_entry *bh; 1391 asection *s = bfd_get_section_by_name (abfd, ".sdata"); 1392 1393 /* The following code was cobbled from elf32-ppc.c and elflink.c. */ 1394 if (s == NULL) 1395 { 1396 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 1397 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 1398 1399 s = bfd_make_section_anyway_with_flags (abfd, ".sdata", 1400 flags); 1401 if (s == NULL) 1402 return false; 1403 if (!bfd_set_section_alignment (s, 2)) 1404 return false; 1405 } 1406 1407 bh = bfd_link_hash_lookup (info->hash, "_SDA_BASE_", 1408 false, false, false); 1409 1410 if ((bh == NULL || bh->type == bfd_link_hash_undefined) 1411 && !(_bfd_generic_link_add_one_symbol (info, 1412 abfd, 1413 "_SDA_BASE_", 1414 BSF_GLOBAL, 1415 s, 1416 (bfd_vma) 32768, 1417 NULL, 1418 false, 1419 get_elf_backend_data (abfd)->collect, 1420 &bh))) 1421 return false; 1422 h = (struct elf_link_hash_entry *) bh; 1423 h->type = STT_OBJECT; 1424 } 1425 1426 switch (sym->st_shndx) 1427 { 1428 case SHN_M32R_SCOMMON: 1429 *secp = bfd_make_section_old_way (abfd, ".scommon"); 1430 (*secp)->flags |= SEC_IS_COMMON | SEC_SMALL_DATA; 1431 *valp = sym->st_size; 1432 break; 1433 } 1434 1435 return true; 1436 } 1437 1438 /* We have to figure out the SDA_BASE value, so that we can adjust the 1439 symbol value correctly. We look up the symbol _SDA_BASE_ in the output 1440 BFD. If we can't find it, we're stuck. We cache it in the ELF 1441 target data. We don't need to adjust the symbol value for an 1442 external symbol if we are producing relocatable output. */ 1443 1444 static bfd_reloc_status_type 1445 m32r_elf_final_sda_base (bfd *output_bfd, 1446 struct bfd_link_info *info, 1447 const char **error_message, 1448 bfd_vma *psb) 1449 { 1450 if (elf_gp (output_bfd) == 0) 1451 { 1452 struct bfd_link_hash_entry *h; 1453 1454 h = bfd_link_hash_lookup (info->hash, "_SDA_BASE_", false, false, true); 1455 if (h != NULL && h->type == bfd_link_hash_defined) 1456 elf_gp (output_bfd) = (h->u.def.value 1457 + h->u.def.section->output_section->vma 1458 + h->u.def.section->output_offset); 1459 else 1460 { 1461 /* Only get the error once. */ 1462 *psb = elf_gp (output_bfd) = 4; 1463 *error_message = 1464 (const char *) _("SDA relocation when _SDA_BASE_ not defined"); 1465 return bfd_reloc_dangerous; 1466 } 1467 } 1468 *psb = elf_gp (output_bfd); 1469 return bfd_reloc_ok; 1470 } 1471 1472 /* Return size of a PLT entry. */ 1474 #define elf_m32r_sizeof_plt(info) PLT_ENTRY_SIZE 1475 1476 /* The m32r linker needs to keep track of the number of relocs that it 1477 decides to copy in check_relocs for each symbol. This is so that 1478 it can discard PC relative relocs if it doesn't need them when 1479 linking with -Bsymbolic. We store the information in a field 1480 extending the regular ELF linker hash table. */ 1481 1482 /* This structure keeps track of the number of PC relative relocs we 1483 have copied for a given symbol. */ 1484 1485 struct elf_m32r_pcrel_relocs_copied 1486 { 1487 /* Next section. */ 1488 struct elf_m32r_pcrel_relocs_copied *next; 1489 /* A section in dynobj. */ 1490 asection *section; 1491 /* Number of relocs copied in this section. */ 1492 bfd_size_type count; 1493 }; 1494 1495 /* Traverse an m32r ELF linker hash table. */ 1496 1497 #define m32r_elf_link_hash_traverse(table, func, info) \ 1498 (elf_link_hash_traverse \ 1499 (&(table)->root, \ 1500 (bool (*) (struct elf_link_hash_entry *, void *)) (func), \ 1501 (info))) 1502 1503 /* Get the m32r ELF linker hash table from a link_info structure. */ 1504 1505 #define m32r_elf_hash_table(p) \ 1506 ((is_elf_hash_table ((p)->hash) \ 1507 && elf_hash_table_id (elf_hash_table (p)) == M32R_ELF_DATA) \ 1508 ? (struct elf_link_hash_table *) (p)->hash : NULL) 1509 1510 /* Create an m32r ELF linker hash table. */ 1511 1512 static struct bfd_link_hash_table * 1513 m32r_elf_link_hash_table_create (bfd *abfd) 1514 { 1515 struct elf_link_hash_table *ret; 1516 size_t amt = sizeof (struct elf_link_hash_table); 1517 1518 ret = bfd_zmalloc (amt); 1519 if (ret == NULL) 1520 return NULL; 1521 1522 if (!_bfd_elf_link_hash_table_init (ret, abfd, 1523 _bfd_elf_link_hash_newfunc, 1524 sizeof (struct elf_link_hash_entry), 1525 M32R_ELF_DATA)) 1526 { 1527 free (ret); 1528 return NULL; 1529 } 1530 1531 return &ret->root; 1532 } 1533 1534 /* Create dynamic sections when linking against a dynamic object. */ 1535 1536 static bool 1537 m32r_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 1538 { 1539 struct elf_link_hash_table *htab; 1540 flagword flags, pltflags; 1541 asection *s; 1542 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 1543 int ptralign = 2; /* 32bit */ 1544 1545 htab = m32r_elf_hash_table (info); 1546 if (htab == NULL) 1547 return false; 1548 1549 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and 1550 .rel[a].bss sections. */ 1551 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 1552 | SEC_LINKER_CREATED); 1553 1554 pltflags = flags; 1555 pltflags |= SEC_CODE; 1556 if (bed->plt_not_loaded) 1557 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); 1558 if (bed->plt_readonly) 1559 pltflags |= SEC_READONLY; 1560 1561 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); 1562 htab->splt = s; 1563 if (s == NULL 1564 || !bfd_set_section_alignment (s, bed->plt_alignment)) 1565 return false; 1566 1567 if (bed->want_plt_sym) 1568 { 1569 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the 1570 .plt section. */ 1571 struct bfd_link_hash_entry *bh = NULL; 1572 struct elf_link_hash_entry *h; 1573 1574 if (! (_bfd_generic_link_add_one_symbol 1575 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 1576 (bfd_vma) 0, NULL, false, 1577 get_elf_backend_data (abfd)->collect, &bh))) 1578 return false; 1579 h = (struct elf_link_hash_entry *) bh; 1580 h->def_regular = 1; 1581 h->type = STT_OBJECT; 1582 htab->hplt = h; 1583 1584 if (bfd_link_pic (info) 1585 && ! bfd_elf_link_record_dynamic_symbol (info, h)) 1586 return false; 1587 } 1588 1589 s = bfd_make_section_anyway_with_flags (abfd, 1590 bed->default_use_rela_p 1591 ? ".rela.plt" : ".rel.plt", 1592 flags | SEC_READONLY); 1593 htab->srelplt = s; 1594 if (s == NULL 1595 || !bfd_set_section_alignment (s, ptralign)) 1596 return false; 1597 1598 if (htab->sgot == NULL 1599 && !_bfd_elf_create_got_section (abfd, info)) 1600 return false; 1601 1602 if (bed->want_dynbss) 1603 { 1604 /* The .dynbss section is a place to put symbols which are defined 1605 by dynamic objects, are referenced by regular objects, and are 1606 not functions. We must allocate space for them in the process 1607 image and use a R_*_COPY reloc to tell the dynamic linker to 1608 initialize them at run time. The linker script puts the .dynbss 1609 section into the .bss section of the final image. */ 1610 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", 1611 SEC_ALLOC | SEC_LINKER_CREATED); 1612 htab->sdynbss = s; 1613 if (s == NULL) 1614 return false; 1615 /* The .rel[a].bss section holds copy relocs. This section is not 1616 normally needed. We need to create it here, though, so that the 1617 linker will map it to an output section. We can't just create it 1618 only if we need it, because we will not know whether we need it 1619 until we have seen all the input files, and the first time the 1620 main linker code calls BFD after examining all the input files 1621 (size_dynamic_sections) the input sections have already been 1622 mapped to the output sections. If the section turns out not to 1623 be needed, we can discard it later. We will never need this 1624 section when generating a shared object, since they do not use 1625 copy relocs. */ 1626 if (! bfd_link_pic (info)) 1627 { 1628 s = bfd_make_section_anyway_with_flags (abfd, 1629 (bed->default_use_rela_p 1630 ? ".rela.bss" : ".rel.bss"), 1631 flags | SEC_READONLY); 1632 htab->srelbss = s; 1633 if (s == NULL 1634 || !bfd_set_section_alignment (s, ptralign)) 1635 return false; 1636 } 1637 } 1638 1639 return true; 1640 } 1641 1642 1643 /* Adjust a symbol defined by a dynamic object and referenced by a 1645 regular object. The current definition is in some section of the 1646 dynamic object, but we're not including those sections. We have to 1647 change the definition to something the rest of the link can 1648 understand. */ 1649 1650 static bool 1651 m32r_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 1652 struct elf_link_hash_entry *h) 1653 { 1654 struct elf_link_hash_table *htab; 1655 bfd *dynobj; 1656 asection *s; 1657 1658 #ifdef DEBUG_PIC 1659 printf ("m32r_elf_adjust_dynamic_symbol()\n"); 1660 #endif 1661 1662 dynobj = elf_hash_table (info)->dynobj; 1663 1664 /* Make sure we know what is going on here. */ 1665 BFD_ASSERT (dynobj != NULL 1666 && (h->needs_plt 1667 || h->is_weakalias 1668 || (h->def_dynamic 1669 && h->ref_regular 1670 && !h->def_regular))); 1671 1672 /* If this is a function, put it in the procedure linkage table. We 1673 will fill in the contents of the procedure linkage table later, 1674 when we know the address of the .got section. */ 1675 if (h->type == STT_FUNC 1676 || h->needs_plt) 1677 { 1678 if (! bfd_link_pic (info) 1679 && !h->def_dynamic 1680 && !h->ref_dynamic 1681 && h->root.type != bfd_link_hash_undefweak 1682 && h->root.type != bfd_link_hash_undefined) 1683 { 1684 /* This case can occur if we saw a PLT reloc in an input 1685 file, but the symbol was never referred to by a dynamic 1686 object. In such a case, we don't actually need to build 1687 a procedure linkage table, and we can just do a PCREL 1688 reloc instead. */ 1689 h->plt.offset = (bfd_vma) -1; 1690 h->needs_plt = 0; 1691 } 1692 1693 return true; 1694 } 1695 else 1696 h->plt.offset = (bfd_vma) -1; 1697 1698 /* If this is a weak symbol, and there is a real definition, the 1699 processor independent code will have arranged for us to see the 1700 real definition first, and we can just use the same value. */ 1701 if (h->is_weakalias) 1702 { 1703 struct elf_link_hash_entry *def = weakdef (h); 1704 BFD_ASSERT (def->root.type == bfd_link_hash_defined); 1705 h->root.u.def.section = def->root.u.def.section; 1706 h->root.u.def.value = def->root.u.def.value; 1707 return true; 1708 } 1709 1710 /* This is a reference to a symbol defined by a dynamic object which 1711 is not a function. */ 1712 1713 /* If we are creating a shared library, we must presume that the 1714 only references to the symbol are via the global offset table. 1715 For such cases we need not do anything here; the relocations will 1716 be handled correctly by relocate_section. */ 1717 if (bfd_link_pic (info)) 1718 return true; 1719 1720 /* If there are no references to this symbol that do not use the 1721 GOT, we don't need to generate a copy reloc. */ 1722 if (!h->non_got_ref) 1723 return true; 1724 1725 /* If -z nocopyreloc was given, we won't generate them either. */ 1726 if (0 && info->nocopyreloc) 1727 { 1728 h->non_got_ref = 0; 1729 return true; 1730 } 1731 1732 /* If we don't find any dynamic relocs in read-only sections, then 1733 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 1734 if (0 && !_bfd_elf_readonly_dynrelocs (h)) 1735 { 1736 h->non_got_ref = 0; 1737 return true; 1738 } 1739 1740 /* We must allocate the symbol in our .dynbss section, which will 1741 become part of the .bss section of the executable. There will be 1742 an entry for this symbol in the .dynsym section. The dynamic 1743 object will contain position independent code, so all references 1744 from the dynamic object to this symbol will go through the global 1745 offset table. The dynamic linker will use the .dynsym entry to 1746 determine the address it must put in the global offset table, so 1747 both the dynamic object and the regular object will refer to the 1748 same memory location for the variable. */ 1749 1750 htab = m32r_elf_hash_table (info); 1751 if (htab == NULL) 1752 return false; 1753 1754 s = htab->sdynbss; 1755 BFD_ASSERT (s != NULL); 1756 1757 /* We must generate a R_M32R_COPY reloc to tell the dynamic linker 1758 to copy the initial value out of the dynamic object and into the 1759 runtime process image. We need to remember the offset into the 1760 .rela.bss section we are going to use. */ 1761 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 1762 { 1763 asection *srel; 1764 1765 srel = htab->srelbss; 1766 BFD_ASSERT (srel != NULL); 1767 srel->size += sizeof (Elf32_External_Rela); 1768 h->needs_copy = 1; 1769 } 1770 1771 return _bfd_elf_adjust_dynamic_copy (info, h, s); 1772 } 1773 1774 /* Allocate space in .plt, .got and associated reloc sections for 1775 dynamic relocs. */ 1776 1777 static bool 1778 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) 1779 { 1780 struct bfd_link_info *info; 1781 struct elf_link_hash_table *htab; 1782 struct elf_dyn_relocs *p; 1783 1784 if (h->root.type == bfd_link_hash_indirect) 1785 return true; 1786 1787 info = (struct bfd_link_info *) inf; 1788 htab = m32r_elf_hash_table (info); 1789 if (htab == NULL) 1790 return false; 1791 1792 if (htab->dynamic_sections_created 1793 && h->plt.refcount > 0) 1794 { 1795 /* Make sure this symbol is output as a dynamic symbol. 1796 Undefined weak syms won't yet be marked as dynamic. */ 1797 if (h->dynindx == -1 1798 && !h->forced_local) 1799 { 1800 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1801 return false; 1802 } 1803 1804 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) 1805 { 1806 asection *s = htab->splt; 1807 1808 /* If this is the first .plt entry, make room for the special 1809 first entry. */ 1810 if (s->size == 0) 1811 s->size += PLT_ENTRY_SIZE; 1812 1813 h->plt.offset = s->size; 1814 1815 /* If this symbol is not defined in a regular file, and we are 1816 not generating a shared library, then set the symbol to this 1817 location in the .plt. This is required to make function 1818 pointers compare as equal between the normal executable and 1819 the shared library. */ 1820 if (! bfd_link_pic (info) 1821 && !h->def_regular) 1822 { 1823 h->root.u.def.section = s; 1824 h->root.u.def.value = h->plt.offset; 1825 } 1826 1827 /* Make room for this entry. */ 1828 s->size += PLT_ENTRY_SIZE; 1829 1830 /* We also need to make an entry in the .got.plt section, which 1831 will be placed in the .got section by the linker script. */ 1832 htab->sgotplt->size += 4; 1833 1834 /* We also need to make an entry in the .rel.plt section. */ 1835 htab->srelplt->size += sizeof (Elf32_External_Rela); 1836 } 1837 else 1838 { 1839 h->plt.offset = (bfd_vma) -1; 1840 h->needs_plt = 0; 1841 } 1842 } 1843 else 1844 { 1845 h->plt.offset = (bfd_vma) -1; 1846 h->needs_plt = 0; 1847 } 1848 1849 if (h->got.refcount > 0) 1850 { 1851 asection *s; 1852 bool dyn; 1853 1854 /* Make sure this symbol is output as a dynamic symbol. 1855 Undefined weak syms won't yet be marked as dynamic. */ 1856 if (h->dynindx == -1 1857 && !h->forced_local) 1858 { 1859 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1860 return false; 1861 } 1862 1863 s = htab->sgot; 1864 1865 h->got.offset = s->size; 1866 s->size += 4; 1867 dyn = htab->dynamic_sections_created; 1868 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)) 1869 htab->srelgot->size += sizeof (Elf32_External_Rela); 1870 } 1871 else 1872 h->got.offset = (bfd_vma) -1; 1873 1874 if (h->dyn_relocs == NULL) 1875 return true; 1876 1877 /* In the shared -Bsymbolic case, discard space allocated for 1878 dynamic pc-relative relocs against symbols which turn out to be 1879 defined in regular objects. For the normal shared case, discard 1880 space for pc-relative relocs that have become local due to symbol 1881 visibility changes. */ 1882 1883 if (bfd_link_pic (info)) 1884 { 1885 if (h->def_regular 1886 && (h->forced_local 1887 || info->symbolic)) 1888 { 1889 struct elf_dyn_relocs **pp; 1890 1891 for (pp = &h->dyn_relocs; (p = *pp) != NULL;) 1892 { 1893 p->count -= p->pc_count; 1894 p->pc_count = 0; 1895 if (p->count == 0) 1896 *pp = p->next; 1897 else 1898 pp = &p->next; 1899 } 1900 } 1901 1902 /* Also discard relocs on undefined weak syms with non-default 1903 visibility. */ 1904 if (h->dyn_relocs != NULL 1905 && h->root.type == bfd_link_hash_undefweak) 1906 { 1907 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 1908 h->dyn_relocs = NULL; 1909 1910 /* Make sure undefined weak symbols are output as a dynamic 1911 symbol in PIEs. */ 1912 else if (h->dynindx == -1 1913 && !h->forced_local) 1914 { 1915 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1916 return false; 1917 } 1918 } 1919 } 1920 else 1921 { 1922 /* For the non-shared case, discard space for relocs against 1923 symbols which turn out to need copy relocs or are not 1924 dynamic. */ 1925 1926 if (!h->non_got_ref 1927 && ((h->def_dynamic 1928 && !h->def_regular) 1929 || (htab->dynamic_sections_created 1930 && (h->root.type == bfd_link_hash_undefweak 1931 || h->root.type == bfd_link_hash_undefined)))) 1932 { 1933 /* Make sure this symbol is output as a dynamic symbol. 1934 Undefined weak syms won't yet be marked as dynamic. */ 1935 if (h->dynindx == -1 1936 && !h->forced_local) 1937 { 1938 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1939 return false; 1940 } 1941 1942 /* If that succeeded, we know we'll be keeping all the 1943 relocs. */ 1944 if (h->dynindx != -1) 1945 goto keep; 1946 } 1947 1948 h->dyn_relocs = NULL; 1949 1950 keep: ; 1951 } 1952 1953 /* Finally, allocate space. */ 1954 for (p = h->dyn_relocs; p != NULL; p = p->next) 1955 { 1956 asection *sreloc = elf_section_data (p->sec)->sreloc; 1957 sreloc->size += p->count * sizeof (Elf32_External_Rela); 1958 } 1959 1960 return true; 1961 } 1962 1963 /* Set the sizes of the dynamic sections. */ 1964 1965 static bool 1966 m32r_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 1967 struct bfd_link_info *info) 1968 { 1969 struct elf_link_hash_table *htab; 1970 bfd *dynobj; 1971 asection *s; 1972 bool relocs; 1973 bfd *ibfd; 1974 1975 #ifdef DEBUG_PIC 1976 printf ("m32r_elf_size_dynamic_sections()\n"); 1977 #endif 1978 1979 htab = m32r_elf_hash_table (info); 1980 if (htab == NULL) 1981 return false; 1982 1983 dynobj = htab->dynobj; 1984 BFD_ASSERT (dynobj != NULL); 1985 1986 if (htab->dynamic_sections_created) 1987 { 1988 /* Set the contents of the .interp section to the interpreter. */ 1989 if (bfd_link_executable (info) && !info->nointerp) 1990 { 1991 s = bfd_get_linker_section (dynobj, ".interp"); 1992 BFD_ASSERT (s != NULL); 1993 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 1994 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 1995 } 1996 } 1997 1998 /* Set up .got offsets for local syms, and space for local dynamic 1999 relocs. */ 2000 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 2001 { 2002 bfd_signed_vma *local_got; 2003 bfd_signed_vma *end_local_got; 2004 bfd_size_type locsymcount; 2005 Elf_Internal_Shdr *symtab_hdr; 2006 asection *srel; 2007 2008 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 2009 continue; 2010 2011 for (s = ibfd->sections; s != NULL; s = s->next) 2012 { 2013 struct elf_dyn_relocs *p; 2014 2015 for (p = ((struct elf_dyn_relocs *) 2016 elf_section_data (s)->local_dynrel); 2017 p != NULL; 2018 p = p->next) 2019 { 2020 if (! bfd_is_abs_section (p->sec) 2021 && bfd_is_abs_section (p->sec->output_section)) 2022 { 2023 /* Input section has been discarded, either because 2024 it is a copy of a linkonce section or due to 2025 linker script /DISCARD/, so we'll be discarding 2026 the relocs too. */ 2027 } 2028 else if (p->count != 0) 2029 { 2030 srel = elf_section_data (p->sec)->sreloc; 2031 srel->size += p->count * sizeof (Elf32_External_Rela); 2032 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2033 info->flags |= DF_TEXTREL; 2034 } 2035 } 2036 } 2037 2038 local_got = elf_local_got_refcounts (ibfd); 2039 if (!local_got) 2040 continue; 2041 2042 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2043 locsymcount = symtab_hdr->sh_info; 2044 end_local_got = local_got + locsymcount; 2045 s = htab->sgot; 2046 srel = htab->srelgot; 2047 for (; local_got < end_local_got; ++local_got) 2048 { 2049 if (*local_got > 0) 2050 { 2051 *local_got = s->size; 2052 s->size += 4; 2053 if (bfd_link_pic (info)) 2054 srel->size += sizeof (Elf32_External_Rela); 2055 } 2056 else 2057 *local_got = (bfd_vma) -1; 2058 } 2059 } 2060 2061 /* Allocate global sym .plt and .got entries, and space for global 2062 sym dynamic relocs. */ 2063 elf_link_hash_traverse (htab, allocate_dynrelocs, info); 2064 2065 /* We now have determined the sizes of the various dynamic sections. 2066 Allocate memory for them. */ 2067 relocs = false; 2068 for (s = dynobj->sections; s != NULL; s = s->next) 2069 { 2070 if ((s->flags & SEC_LINKER_CREATED) == 0) 2071 continue; 2072 2073 if (s == htab->splt 2074 || s == htab->sgot 2075 || s == htab->sgotplt 2076 || s == htab->sdynbss) 2077 { 2078 /* Strip this section if we don't need it; see the 2079 comment below. */ 2080 } 2081 else if (startswith (bfd_section_name (s), ".rela")) 2082 { 2083 if (s->size != 0 && s != htab->srelplt) 2084 relocs = true; 2085 2086 /* We use the reloc_count field as a counter if we need 2087 to copy relocs into the output file. */ 2088 s->reloc_count = 0; 2089 } 2090 else 2091 /* It's not one of our sections, so don't allocate space. */ 2092 continue; 2093 2094 if (s->size == 0) 2095 { 2096 /* If we don't need this section, strip it from the 2097 output file. This is mostly to handle .rela.bss and 2098 .rela.plt. We must create both sections in 2099 create_dynamic_sections, because they must be created 2100 before the linker maps input sections to output 2101 sections. The linker does that before 2102 adjust_dynamic_symbol is called, and it is that 2103 function which decides whether anything needs to go 2104 into these sections. */ 2105 s->flags |= SEC_EXCLUDE; 2106 continue; 2107 } 2108 2109 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2110 continue; 2111 2112 /* Allocate memory for the section contents. We use bfd_zalloc 2113 here in case unused entries are not reclaimed before the 2114 section's contents are written out. This should not happen, 2115 but this way if it does, we get a R_M32R_NONE reloc instead 2116 of garbage. */ 2117 s->contents = bfd_zalloc (dynobj, s->size); 2118 if (s->contents == NULL) 2119 return false; 2120 } 2121 2122 return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs); 2123 } 2124 2125 /* Relocate an M32R/D ELF section. 2126 There is some attempt to make this function usable for many architectures, 2127 both for RELA and REL type relocs, if only to serve as a learning tool. 2128 2129 The RELOCATE_SECTION function is called by the new ELF backend linker 2130 to handle the relocations for a section. 2131 2132 The relocs are always passed as Rela structures; if the section 2133 actually uses Rel structures, the r_addend field will always be 2134 zero. 2135 2136 This function is responsible for adjust the section contents as 2137 necessary, and (if using Rela relocs and generating a 2138 relocatable output file) adjusting the reloc addend as 2139 necessary. 2140 2141 This function does not have to worry about setting the reloc 2142 address or the reloc symbol index. 2143 2144 LOCAL_SYMS is a pointer to the swapped in local symbols. 2145 2146 LOCAL_SECTIONS is an array giving the section in the input file 2147 corresponding to the st_shndx field of each local symbol. 2148 2149 The global hash table entry for the global symbols can be found 2150 via elf_sym_hashes (input_bfd). 2151 2152 When generating relocatable output, this function must handle 2153 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 2154 going to be the section symbol corresponding to the output 2155 section, which means that the addend must be adjusted 2156 accordingly. */ 2157 2158 static int 2159 m32r_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, 2160 struct bfd_link_info *info, 2161 bfd *input_bfd, 2162 asection *input_section, 2163 bfd_byte *contents, 2164 Elf_Internal_Rela *relocs, 2165 Elf_Internal_Sym *local_syms, 2166 asection **local_sections) 2167 { 2168 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 2169 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); 2170 Elf_Internal_Rela *rel, *relend; 2171 /* Assume success. */ 2172 bool ret = true; 2173 struct elf_link_hash_table *htab = m32r_elf_hash_table (info); 2174 bfd_vma *local_got_offsets; 2175 asection *sgot, *splt, *sreloc; 2176 bfd_vma high_address = bfd_get_section_limit (input_bfd, input_section); 2177 2178 if (htab == NULL) 2179 return false; 2180 2181 local_got_offsets = elf_local_got_offsets (input_bfd); 2182 2183 sgot = htab->sgot; 2184 splt = htab->splt; 2185 sreloc = NULL; 2186 2187 rel = relocs; 2188 relend = relocs + input_section->reloc_count; 2189 for (; rel < relend; rel++) 2190 { 2191 int r_type; 2192 reloc_howto_type *howto; 2193 unsigned long r_symndx; 2194 struct elf_link_hash_entry *h; 2195 /* We can't modify r_addend here as elf_link_input_bfd has an assert to 2196 ensure it's zero (we use REL relocs, not RELA). Therefore this 2197 should be assigning zero to `addend', but for clarity we use 2198 `r_addend'. */ 2199 bfd_vma addend = rel->r_addend; 2200 bfd_vma offset = rel->r_offset; 2201 bfd_vma relocation; 2202 Elf_Internal_Sym *sym; 2203 asection *sec; 2204 const char *sym_name; 2205 bfd_reloc_status_type r; 2206 const char *errmsg = NULL; 2207 bool use_rel = false; 2208 2209 h = NULL; 2210 r_type = ELF32_R_TYPE (rel->r_info); 2211 if (r_type < 0 || r_type >= (int) R_M32R_max) 2212 { 2213 /* xgettext:c-format */ 2214 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 2215 input_bfd, (int) r_type); 2216 bfd_set_error (bfd_error_bad_value); 2217 ret = false; 2218 continue; 2219 } 2220 2221 if ( r_type == R_M32R_GNU_VTENTRY 2222 || r_type == R_M32R_GNU_VTINHERIT 2223 || r_type == R_M32R_NONE 2224 || r_type == R_M32R_RELA_GNU_VTENTRY 2225 || r_type == R_M32R_RELA_GNU_VTINHERIT) 2226 continue; 2227 2228 if (r_type <= R_M32R_GNU_VTENTRY) 2229 use_rel = true; 2230 2231 howto = m32r_elf_howto_table + r_type; 2232 r_symndx = ELF32_R_SYM (rel->r_info); 2233 2234 sym = NULL; 2235 sec = NULL; 2236 h = NULL; 2237 2238 if (r_symndx < symtab_hdr->sh_info) 2239 { 2240 /* Local symbol. */ 2241 sym = local_syms + r_symndx; 2242 sec = local_sections[r_symndx]; 2243 sym_name = "<local symbol>"; 2244 2245 if (!use_rel) 2246 { 2247 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2248 addend = rel->r_addend; 2249 } 2250 else 2251 { 2252 relocation = (sec->output_section->vma 2253 + sec->output_offset 2254 + sym->st_value); 2255 } 2256 } 2257 else 2258 { 2259 /* External symbol. */ 2260 relocation = 0; 2261 2262 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 2263 2264 if (info->wrap_hash != NULL 2265 && (input_section->flags & SEC_DEBUGGING) != 0) 2266 h = ((struct elf_link_hash_entry *) 2267 unwrap_hash_lookup (info, input_bfd, &h->root)); 2268 2269 while (h->root.type == bfd_link_hash_indirect 2270 || h->root.type == bfd_link_hash_warning) 2271 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2272 sym_name = h->root.root.string; 2273 2274 if (h->root.type == bfd_link_hash_defined 2275 || h->root.type == bfd_link_hash_defweak) 2276 { 2277 bool dyn; 2278 sec = h->root.u.def.section; 2279 2280 dyn = htab->dynamic_sections_created; 2281 sec = h->root.u.def.section; 2282 if (r_type == R_M32R_GOTPC24 2283 || (r_type == R_M32R_GOTPC_HI_ULO 2284 || r_type == R_M32R_GOTPC_HI_SLO 2285 || r_type == R_M32R_GOTPC_LO) 2286 || (r_type == R_M32R_26_PLTREL 2287 && h->plt.offset != (bfd_vma) -1) 2288 || ((r_type == R_M32R_GOT24 2289 || r_type == R_M32R_GOT16_HI_ULO 2290 || r_type == R_M32R_GOT16_HI_SLO 2291 || r_type == R_M32R_GOT16_LO) 2292 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 2293 bfd_link_pic (info), 2294 h) 2295 && (! bfd_link_pic (info) 2296 || (! info->symbolic && h->dynindx != -1) 2297 || !h->def_regular)) 2298 || (bfd_link_pic (info) 2299 && ((! info->symbolic && h->dynindx != -1) 2300 || !h->def_regular) 2301 && (((r_type == R_M32R_16_RELA 2302 || r_type == R_M32R_32_RELA 2303 || r_type == R_M32R_24_RELA 2304 || r_type == R_M32R_HI16_ULO_RELA 2305 || r_type == R_M32R_HI16_SLO_RELA 2306 || r_type == R_M32R_LO16_RELA) 2307 && !h->forced_local) 2308 || r_type == R_M32R_REL32 2309 || r_type == R_M32R_10_PCREL_RELA 2310 || r_type == R_M32R_18_PCREL_RELA 2311 || r_type == R_M32R_26_PCREL_RELA) 2312 && ((input_section->flags & SEC_ALLOC) != 0 2313 /* DWARF will emit R_M32R_16(24,32) relocations 2314 in its sections against symbols defined 2315 externally in shared libraries. We can't do 2316 anything with them here. */ 2317 || ((input_section->flags & SEC_DEBUGGING) != 0 2318 && h->def_dynamic)))) 2319 { 2320 /* In these cases, we don't need the relocation 2321 value. We check specially because in some 2322 obscure cases sec->output_section will be NULL. */ 2323 } 2324 else if (sec->output_section != NULL) 2325 relocation = (h->root.u.def.value 2326 + sec->output_section->vma 2327 + sec->output_offset); 2328 else if (!bfd_link_relocatable (info) 2329 && (_bfd_elf_section_offset (output_bfd, info, 2330 input_section, 2331 rel->r_offset) 2332 != (bfd_vma) -1)) 2333 { 2334 _bfd_error_handler 2335 /* xgettext:c-format */ 2336 (_("%pB(%pA+%#" PRIx64 "): unresolvable %s relocation " 2337 "against symbol `%s'"), 2338 input_bfd, 2339 input_section, 2340 (uint64_t) rel->r_offset, 2341 howto->name, 2342 h->root.root.string); 2343 } 2344 } 2345 else if (h->root.type == bfd_link_hash_undefweak) 2346 ; 2347 else if (info->unresolved_syms_in_objects == RM_IGNORE 2348 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) 2349 ; 2350 else if (!bfd_link_relocatable (info)) 2351 info->callbacks->undefined_symbol 2352 (info, h->root.root.string, input_bfd, input_section, offset, 2353 (info->unresolved_syms_in_objects == RM_DIAGNOSE 2354 && !info->warn_unresolved_syms) 2355 || ELF_ST_VISIBILITY (h->other)); 2356 } 2357 2358 if (sec != NULL && discarded_section (sec)) 2359 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2360 rel, 1, relend, howto, 0, contents); 2361 2362 if (bfd_link_relocatable (info) && !use_rel) 2363 { 2364 /* This is a relocatable link. We don't have to change 2365 anything, unless the reloc is against a section symbol, 2366 in which case we have to adjust according to where the 2367 section symbol winds up in the output section. */ 2368 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) 2369 rel->r_addend += sec->output_offset; 2370 continue; 2371 } 2372 2373 if (bfd_link_relocatable (info) && use_rel) 2374 { 2375 /* This is a relocatable link. We don't have to change 2376 anything, unless the reloc is against a section symbol, 2377 in which case we have to adjust according to where the 2378 section symbol winds up in the output section. */ 2379 if (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION) 2380 continue; 2381 2382 addend += sec->output_offset; 2383 2384 /* If partial_inplace, we need to store any additional addend 2385 back in the section. */ 2386 if (! howto->partial_inplace) 2387 continue; 2388 /* ??? Here is a nice place to call a special_function 2389 like handler. */ 2390 if (r_type != R_M32R_HI16_SLO && r_type != R_M32R_HI16_ULO) 2391 r = _bfd_relocate_contents (howto, input_bfd, 2392 addend, contents + offset); 2393 else 2394 { 2395 Elf_Internal_Rela *lorel; 2396 2397 /* We allow an arbitrary number of HI16 relocs before the 2398 LO16 reloc. This permits gcc to emit the HI and LO relocs 2399 itself. */ 2400 for (lorel = rel + 1; 2401 (lorel < relend 2402 && (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO 2403 || ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO)); 2404 lorel++) 2405 continue; 2406 if (lorel < relend 2407 && ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16) 2408 { 2409 m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel, 2410 contents, addend); 2411 r = bfd_reloc_ok; 2412 } 2413 else 2414 r = _bfd_relocate_contents (howto, input_bfd, 2415 addend, contents + offset); 2416 } 2417 } 2418 else 2419 { 2420 /* Sanity check the address. */ 2421 if (offset > high_address) 2422 { 2423 r = bfd_reloc_outofrange; 2424 goto check_reloc; 2425 } 2426 2427 switch ((int) r_type) 2428 { 2429 case R_M32R_GOTOFF: 2430 /* Relocation is relative to the start of the global offset 2431 table (for ld24 rx, #uimm24). eg access at label+addend 2432 2433 ld24 rx. #label@GOTOFF + addend 2434 sub rx, r12. */ 2435 2436 BFD_ASSERT (sgot != NULL); 2437 2438 relocation = -(relocation - sgot->output_section->vma); 2439 rel->r_addend = -rel->r_addend; 2440 break; 2441 2442 case R_M32R_GOTOFF_HI_ULO: 2443 case R_M32R_GOTOFF_HI_SLO: 2444 case R_M32R_GOTOFF_LO: 2445 BFD_ASSERT (sgot != NULL); 2446 2447 relocation -= sgot->output_section->vma; 2448 2449 if ((r_type == R_M32R_GOTOFF_HI_SLO) 2450 && ((relocation + rel->r_addend) & 0x8000)) 2451 rel->r_addend += 0x10000; 2452 break; 2453 2454 case R_M32R_GOTPC24: 2455 /* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation 2456 ld24 rx,#_GLOBAL_OFFSET_TABLE_ 2457 */ 2458 relocation = sgot->output_section->vma; 2459 break; 2460 2461 case R_M32R_GOTPC_HI_ULO: 2462 case R_M32R_GOTPC_HI_SLO: 2463 case R_M32R_GOTPC_LO: 2464 { 2465 /* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation 2466 bl .+4 2467 seth rx,#high(_GLOBAL_OFFSET_TABLE_) 2468 or3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4) 2469 or 2470 bl .+4 2471 seth rx,#shigh(_GLOBAL_OFFSET_TABLE_) 2472 add3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4) 2473 */ 2474 relocation = sgot->output_section->vma; 2475 relocation -= (input_section->output_section->vma 2476 + input_section->output_offset 2477 + rel->r_offset); 2478 if ((r_type == R_M32R_GOTPC_HI_SLO) 2479 && ((relocation + rel->r_addend) & 0x8000)) 2480 rel->r_addend += 0x10000; 2481 2482 break; 2483 } 2484 case R_M32R_GOT16_HI_ULO: 2485 case R_M32R_GOT16_HI_SLO: 2486 case R_M32R_GOT16_LO: 2487 /* Fall through. */ 2488 case R_M32R_GOT24: 2489 /* Relocation is to the entry for this symbol in the global 2490 offset table. */ 2491 BFD_ASSERT (sgot != NULL); 2492 2493 if (h != NULL) 2494 { 2495 bool dyn; 2496 bfd_vma off; 2497 2498 off = h->got.offset; 2499 BFD_ASSERT (off != (bfd_vma) -1); 2500 2501 dyn = htab->dynamic_sections_created; 2502 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 2503 bfd_link_pic (info), 2504 h) 2505 || (bfd_link_pic (info) 2506 && (info->symbolic 2507 || h->dynindx == -1 2508 || h->forced_local) 2509 && h->def_regular)) 2510 { 2511 /* This is actually a static link, or it is a 2512 -Bsymbolic link and the symbol is defined 2513 locally, or the symbol was forced to be local 2514 because of a version file. We must initialize 2515 this entry in the global offset table. Since the 2516 offset must always be a multiple of 4, we use the 2517 least significant bit to record whether we have 2518 initialized it already. 2519 2520 When doing a dynamic link, we create a .rela.got 2521 relocation entry to initialize the value. This 2522 is done in the finish_dynamic_symbol routine. */ 2523 if ((off & 1) != 0) 2524 off &= ~1; 2525 else 2526 { 2527 bfd_put_32 (output_bfd, relocation, 2528 sgot->contents + off); 2529 h->got.offset |= 1; 2530 } 2531 } 2532 2533 relocation = sgot->output_offset + off; 2534 } 2535 else 2536 { 2537 bfd_vma off; 2538 bfd_byte *loc; 2539 2540 BFD_ASSERT (local_got_offsets != NULL 2541 && local_got_offsets[r_symndx] != (bfd_vma) -1); 2542 2543 off = local_got_offsets[r_symndx]; 2544 2545 /* The offset must always be a multiple of 4. We use 2546 the least significant bit to record whether we have 2547 already processed this entry. */ 2548 if ((off & 1) != 0) 2549 off &= ~1; 2550 else 2551 { 2552 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 2553 2554 if (bfd_link_pic (info)) 2555 { 2556 asection *srelgot; 2557 Elf_Internal_Rela outrel; 2558 2559 /* We need to generate a R_M32R_RELATIVE reloc 2560 for the dynamic linker. */ 2561 srelgot = htab->srelgot; 2562 BFD_ASSERT (srelgot != NULL); 2563 2564 outrel.r_offset = (sgot->output_section->vma 2565 + sgot->output_offset 2566 + off); 2567 outrel.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); 2568 outrel.r_addend = relocation; 2569 loc = srelgot->contents; 2570 loc += srelgot->reloc_count * sizeof (Elf32_External_Rela); 2571 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); 2572 ++srelgot->reloc_count; 2573 } 2574 2575 local_got_offsets[r_symndx] |= 1; 2576 } 2577 2578 relocation = sgot->output_offset + off; 2579 } 2580 if ((r_type == R_M32R_GOT16_HI_SLO) 2581 && ((relocation + rel->r_addend) & 0x8000)) 2582 rel->r_addend += 0x10000; 2583 2584 break; 2585 2586 case R_M32R_26_PLTREL: 2587 /* Relocation is to the entry for this symbol in the 2588 procedure linkage table. */ 2589 2590 /* The native assembler will generate a 26_PLTREL reloc 2591 for a local symbol if you assemble a call from one 2592 section to another when using -K pic. */ 2593 if (h == NULL) 2594 break; 2595 2596 if (h->forced_local) 2597 break; 2598 2599 if (h->plt.offset == (bfd_vma) -1) 2600 /* We didn't make a PLT entry for this symbol. This 2601 happens when statically linking PIC code, or when 2602 using -Bsymbolic. */ 2603 break; 2604 2605 relocation = (splt->output_section->vma 2606 + splt->output_offset 2607 + h->plt.offset); 2608 break; 2609 2610 case R_M32R_HI16_SLO_RELA: 2611 if ((relocation + rel->r_addend) & 0x8000) 2612 rel->r_addend += 0x10000; 2613 /* Fall through. */ 2614 2615 case R_M32R_16_RELA: 2616 case R_M32R_24_RELA: 2617 case R_M32R_32_RELA: 2618 case R_M32R_REL32: 2619 case R_M32R_10_PCREL_RELA: 2620 case R_M32R_18_PCREL_RELA: 2621 case R_M32R_26_PCREL_RELA: 2622 case R_M32R_HI16_ULO_RELA: 2623 case R_M32R_LO16_RELA: 2624 if (bfd_link_pic (info) 2625 && r_symndx != STN_UNDEF 2626 && (input_section->flags & SEC_ALLOC) != 0 2627 && (( r_type != R_M32R_10_PCREL_RELA 2628 && r_type != R_M32R_18_PCREL_RELA 2629 && r_type != R_M32R_26_PCREL_RELA 2630 && r_type != R_M32R_REL32) 2631 || (h != NULL 2632 && h->dynindx != -1 2633 && (! info->symbolic 2634 || !h->def_regular)))) 2635 { 2636 Elf_Internal_Rela outrel; 2637 bool skip, relocate; 2638 bfd_byte *loc; 2639 2640 /* When generating a shared object, these relocations 2641 are copied into the output file to be resolved at run 2642 time. */ 2643 if (sreloc == NULL) 2644 { 2645 sreloc = _bfd_elf_get_dynamic_reloc_section 2646 (input_bfd, input_section, /*rela?*/ true); 2647 if (sreloc == NULL) 2648 return false; 2649 } 2650 2651 skip = false; 2652 relocate = false; 2653 2654 outrel.r_offset = _bfd_elf_section_offset (output_bfd, 2655 info, 2656 input_section, 2657 rel->r_offset); 2658 if (outrel.r_offset == (bfd_vma) -1) 2659 skip = true; 2660 else if (outrel.r_offset == (bfd_vma) -2) 2661 skip = relocate = true; 2662 outrel.r_offset += (input_section->output_section->vma 2663 + input_section->output_offset); 2664 2665 if (skip) 2666 memset (&outrel, 0, sizeof outrel); 2667 else if ( r_type == R_M32R_10_PCREL_RELA 2668 || r_type == R_M32R_18_PCREL_RELA 2669 || r_type == R_M32R_26_PCREL_RELA 2670 || r_type == R_M32R_REL32) 2671 { 2672 BFD_ASSERT (h != NULL && h->dynindx != -1); 2673 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 2674 outrel.r_addend = rel->r_addend; 2675 } 2676 else 2677 { 2678 /* h->dynindx may be -1 if this symbol was marked to 2679 become local. */ 2680 if (h == NULL 2681 || ((info->symbolic || h->dynindx == -1) 2682 && h->def_regular)) 2683 { 2684 relocate = true; 2685 outrel.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); 2686 outrel.r_addend = relocation + rel->r_addend; 2687 } 2688 else 2689 { 2690 BFD_ASSERT (h->dynindx != -1); 2691 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 2692 outrel.r_addend = relocation + rel->r_addend; 2693 } 2694 } 2695 2696 loc = sreloc->contents; 2697 loc += sreloc->reloc_count * sizeof (Elf32_External_Rela); 2698 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); 2699 ++sreloc->reloc_count; 2700 2701 /* If this reloc is against an external symbol, we do 2702 not want to fiddle with the addend. Otherwise, we 2703 need to include the symbol value so that it becomes 2704 an addend for the dynamic reloc. */ 2705 if (! relocate) 2706 continue; 2707 break; 2708 } 2709 else if (r_type != R_M32R_10_PCREL_RELA) 2710 break; 2711 /* Fall through. */ 2712 2713 case (int) R_M32R_10_PCREL : 2714 r = m32r_elf_do_10_pcrel_reloc (input_bfd, howto, input_section, 2715 contents, offset, 2716 sec, relocation, addend); 2717 goto check_reloc; 2718 2719 case (int) R_M32R_HI16_SLO : 2720 case (int) R_M32R_HI16_ULO : 2721 { 2722 Elf_Internal_Rela *lorel; 2723 2724 /* We allow an arbitrary number of HI16 relocs before the 2725 LO16 reloc. This permits gcc to emit the HI and LO relocs 2726 itself. */ 2727 for (lorel = rel + 1; 2728 (lorel < relend 2729 && (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO 2730 || ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO)); 2731 lorel++) 2732 continue; 2733 if (lorel < relend 2734 && ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16) 2735 { 2736 m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel, 2737 contents, relocation + addend); 2738 r = bfd_reloc_ok; 2739 } 2740 else 2741 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 2742 contents, offset, 2743 relocation, addend); 2744 } 2745 2746 goto check_reloc; 2747 2748 case (int) R_M32R_SDA16_RELA: 2749 case (int) R_M32R_SDA16 : 2750 { 2751 const char *name; 2752 2753 BFD_ASSERT (sec != NULL); 2754 name = bfd_section_name (sec); 2755 2756 if ( strcmp (name, ".sdata") == 0 2757 || strcmp (name, ".sbss") == 0 2758 || strcmp (name, ".scommon") == 0) 2759 { 2760 bfd_vma sda_base; 2761 bfd *out_bfd = sec->output_section->owner; 2762 2763 r = m32r_elf_final_sda_base (out_bfd, info, 2764 &errmsg, 2765 &sda_base); 2766 if (r != bfd_reloc_ok) 2767 { 2768 ret = false; 2769 goto check_reloc; 2770 } 2771 2772 /* At this point `relocation' contains the object's 2773 address. */ 2774 relocation -= sda_base; 2775 /* Now it contains the offset from _SDA_BASE_. */ 2776 } 2777 else 2778 { 2779 _bfd_error_handler 2780 /* xgettext:c-format */ 2781 (_("%pB: the target (%s) of an %s relocation" 2782 " is in the wrong section (%pA)"), 2783 input_bfd, 2784 sym_name, 2785 m32r_elf_howto_table[(int) r_type].name, 2786 sec); 2787 /*bfd_set_error (bfd_error_bad_value); ??? why? */ 2788 ret = false; 2789 continue; 2790 } 2791 } 2792 /* Fall through. */ 2793 2794 default : /* OLD_M32R_RELOC */ 2795 2796 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 2797 contents, offset, 2798 relocation, addend); 2799 goto check_reloc; 2800 } 2801 2802 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 2803 contents, rel->r_offset, 2804 relocation, rel->r_addend); 2805 2806 } 2807 2808 check_reloc: 2809 2810 if (r != bfd_reloc_ok) 2811 { 2812 /* FIXME: This should be generic enough to go in a utility. */ 2813 const char *name; 2814 2815 if (h != NULL) 2816 name = h->root.root.string; 2817 else 2818 { 2819 name = (bfd_elf_string_from_elf_section 2820 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 2821 if (name == NULL || *name == '\0') 2822 name = bfd_section_name (sec); 2823 } 2824 2825 if (errmsg != NULL) 2826 goto common_error; 2827 2828 switch (r) 2829 { 2830 case bfd_reloc_overflow: 2831 (*info->callbacks->reloc_overflow) 2832 (info, (h ? &h->root : NULL), name, howto->name, 2833 (bfd_vma) 0, input_bfd, input_section, offset); 2834 break; 2835 2836 case bfd_reloc_undefined: 2837 (*info->callbacks->undefined_symbol) 2838 (info, name, input_bfd, input_section, offset, true); 2839 break; 2840 2841 case bfd_reloc_outofrange: 2842 errmsg = _("internal error: out of range error"); 2843 goto common_error; 2844 2845 case bfd_reloc_notsupported: 2846 errmsg = _("internal error: unsupported relocation error"); 2847 goto common_error; 2848 2849 case bfd_reloc_dangerous: 2850 errmsg = _("internal error: dangerous error"); 2851 goto common_error; 2852 2853 default: 2854 errmsg = _("internal error: unknown error"); 2855 /* fall through */ 2856 2857 common_error: 2858 (*info->callbacks->warning) (info, errmsg, name, input_bfd, 2859 input_section, offset); 2860 break; 2861 } 2862 } 2863 } 2864 2865 return ret; 2866 } 2867 2868 /* Finish up dynamic symbol handling. We set the contents of various 2869 dynamic sections here. */ 2870 2871 static bool 2872 m32r_elf_finish_dynamic_symbol (bfd *output_bfd, 2873 struct bfd_link_info *info, 2874 struct elf_link_hash_entry *h, 2875 Elf_Internal_Sym *sym) 2876 { 2877 struct elf_link_hash_table *htab; 2878 bfd_byte *loc; 2879 2880 #ifdef DEBUG_PIC 2881 printf ("m32r_elf_finish_dynamic_symbol()\n"); 2882 #endif 2883 2884 htab = m32r_elf_hash_table (info); 2885 if (htab == NULL) 2886 return false; 2887 2888 if (h->plt.offset != (bfd_vma) -1) 2889 { 2890 asection *splt; 2891 asection *sgot; 2892 asection *srela; 2893 2894 bfd_vma plt_index; 2895 bfd_vma got_offset; 2896 Elf_Internal_Rela rela; 2897 2898 /* This symbol has an entry in the procedure linkage table. Set 2899 it up. */ 2900 2901 BFD_ASSERT (h->dynindx != -1); 2902 2903 splt = htab->splt; 2904 sgot = htab->sgotplt; 2905 srela = htab->srelplt; 2906 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); 2907 2908 /* Get the index in the procedure linkage table which 2909 corresponds to this symbol. This is the index of this symbol 2910 in all the symbols for which we are making plt entries. The 2911 first entry in the procedure linkage table is reserved. */ 2912 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 2913 2914 /* Get the offset into the .got table of the entry that 2915 corresponds to this function. Each .got entry is 4 bytes. 2916 The first three are reserved. */ 2917 got_offset = (plt_index + 3) * 4; 2918 2919 /* Fill in the entry in the procedure linkage table. */ 2920 if (! bfd_link_pic (info)) 2921 { 2922 bfd_put_32 (output_bfd, 2923 (PLT_ENTRY_WORD0b 2924 + (((sgot->output_section->vma 2925 + sgot->output_offset 2926 + got_offset) >> 16) & 0xffff)), 2927 splt->contents + h->plt.offset); 2928 bfd_put_32 (output_bfd, 2929 (PLT_ENTRY_WORD1b 2930 + ((sgot->output_section->vma 2931 + sgot->output_offset 2932 + got_offset) & 0xffff)), 2933 splt->contents + h->plt.offset + 4); 2934 bfd_put_32 (output_bfd, PLT_ENTRY_WORD2, 2935 splt->contents + h->plt.offset + 8); 2936 bfd_put_32 (output_bfd, 2937 (PLT_ENTRY_WORD3 2938 + plt_index * sizeof (Elf32_External_Rela)), 2939 splt->contents + h->plt.offset + 12); 2940 bfd_put_32 (output_bfd, 2941 (PLT_ENTRY_WORD4 2942 + (((unsigned int) ((- (h->plt.offset + 16)) >> 2)) & 0xffffff)), 2943 splt->contents + h->plt.offset + 16); 2944 } 2945 else 2946 { 2947 bfd_put_32 (output_bfd, 2948 PLT_ENTRY_WORD0 + got_offset, 2949 splt->contents + h->plt.offset); 2950 bfd_put_32 (output_bfd, PLT_ENTRY_WORD1, 2951 splt->contents + h->plt.offset + 4); 2952 bfd_put_32 (output_bfd, PLT_ENTRY_WORD2, 2953 splt->contents + h->plt.offset + 8); 2954 bfd_put_32 (output_bfd, 2955 (PLT_ENTRY_WORD3 2956 + plt_index * sizeof (Elf32_External_Rela)), 2957 splt->contents + h->plt.offset + 12); 2958 bfd_put_32 (output_bfd, 2959 (PLT_ENTRY_WORD4 2960 + (((unsigned int) ((- (h->plt.offset + 16)) >> 2)) & 0xffffff)), 2961 splt->contents + h->plt.offset + 16); 2962 } 2963 2964 /* Fill in the entry in the global offset table. */ 2965 bfd_put_32 (output_bfd, 2966 (splt->output_section->vma 2967 + splt->output_offset 2968 + h->plt.offset 2969 + 12), /* same offset */ 2970 sgot->contents + got_offset); 2971 2972 /* Fill in the entry in the .rela.plt section. */ 2973 rela.r_offset = (sgot->output_section->vma 2974 + sgot->output_offset 2975 + got_offset); 2976 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_JMP_SLOT); 2977 rela.r_addend = 0; 2978 loc = srela->contents; 2979 loc += plt_index * sizeof (Elf32_External_Rela); 2980 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 2981 2982 if (!h->def_regular) 2983 { 2984 /* Mark the symbol as undefined, rather than as defined in 2985 the .plt section. Leave the value alone. */ 2986 sym->st_shndx = SHN_UNDEF; 2987 } 2988 } 2989 2990 if (h->got.offset != (bfd_vma) -1) 2991 { 2992 asection *sgot; 2993 asection *srela; 2994 Elf_Internal_Rela rela; 2995 2996 /* This symbol has an entry in the global offset table. Set it 2997 up. */ 2998 2999 sgot = htab->sgot; 3000 srela = htab->srelgot; 3001 BFD_ASSERT (sgot != NULL && srela != NULL); 3002 3003 rela.r_offset = (sgot->output_section->vma 3004 + sgot->output_offset 3005 + (h->got.offset &~ 1)); 3006 3007 /* If this is a -Bsymbolic link, and the symbol is defined 3008 locally, we just want to emit a RELATIVE reloc. Likewise if 3009 the symbol was forced to be local because of a version file. 3010 The entry in the global offset table will already have been 3011 initialized in the relocate_section function. */ 3012 if (bfd_link_pic (info) 3013 && (info->symbolic 3014 || h->dynindx == -1 3015 || h->forced_local) 3016 && h->def_regular) 3017 { 3018 rela.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); 3019 rela.r_addend = (h->root.u.def.value 3020 + h->root.u.def.section->output_section->vma 3021 + h->root.u.def.section->output_offset); 3022 } 3023 else 3024 { 3025 BFD_ASSERT ((h->got.offset & 1) == 0); 3026 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); 3027 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_GLOB_DAT); 3028 rela.r_addend = 0; 3029 } 3030 3031 loc = srela->contents; 3032 loc += srela->reloc_count * sizeof (Elf32_External_Rela); 3033 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3034 ++srela->reloc_count; 3035 } 3036 3037 if (h->needs_copy) 3038 { 3039 asection *s; 3040 Elf_Internal_Rela rela; 3041 3042 /* This symbols needs a copy reloc. Set it up. */ 3043 3044 BFD_ASSERT (h->dynindx != -1 3045 && (h->root.type == bfd_link_hash_defined 3046 || h->root.type == bfd_link_hash_defweak)); 3047 3048 s = bfd_get_linker_section (htab->dynobj, ".rela.bss"); 3049 BFD_ASSERT (s != NULL); 3050 3051 rela.r_offset = (h->root.u.def.value 3052 + h->root.u.def.section->output_section->vma 3053 + h->root.u.def.section->output_offset); 3054 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_COPY); 3055 rela.r_addend = 0; 3056 loc = s->contents; 3057 loc += s->reloc_count * sizeof (Elf32_External_Rela); 3058 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3059 ++s->reloc_count; 3060 } 3061 3062 /* Mark some specially defined symbols as absolute. */ 3063 if (h == htab->hdynamic || h == htab->hgot) 3064 sym->st_shndx = SHN_ABS; 3065 3066 return true; 3067 } 3068 3069 3070 /* Finish up the dynamic sections. */ 3071 3072 static bool 3073 m32r_elf_finish_dynamic_sections (bfd *output_bfd, 3074 struct bfd_link_info *info) 3075 { 3076 struct elf_link_hash_table *htab; 3077 bfd *dynobj; 3078 asection *sdyn; 3079 asection *sgot; 3080 3081 #ifdef DEBUG_PIC 3082 printf ("m32r_elf_finish_dynamic_sections()\n"); 3083 #endif 3084 3085 htab = m32r_elf_hash_table (info); 3086 if (htab == NULL) 3087 return false; 3088 3089 dynobj = htab->dynobj; 3090 3091 sgot = htab->sgotplt; 3092 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 3093 3094 if (htab->dynamic_sections_created) 3095 { 3096 asection *splt; 3097 Elf32_External_Dyn *dyncon, *dynconend; 3098 3099 BFD_ASSERT (sgot != NULL && sdyn != NULL); 3100 3101 dyncon = (Elf32_External_Dyn *) sdyn->contents; 3102 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 3103 3104 for (; dyncon < dynconend; dyncon++) 3105 { 3106 Elf_Internal_Dyn dyn; 3107 asection *s; 3108 3109 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 3110 3111 switch (dyn.d_tag) 3112 { 3113 default: 3114 break; 3115 3116 case DT_PLTGOT: 3117 s = htab->sgotplt; 3118 goto get_vma; 3119 case DT_JMPREL: 3120 s = htab->srelplt; 3121 get_vma: 3122 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 3123 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3124 break; 3125 3126 case DT_PLTRELSZ: 3127 s = htab->srelplt; 3128 dyn.d_un.d_val = s->size; 3129 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3130 break; 3131 } 3132 } 3133 3134 /* Fill in the first entry in the procedure linkage table. */ 3135 splt = htab->splt; 3136 if (splt && splt->size > 0) 3137 { 3138 if (bfd_link_pic (info)) 3139 { 3140 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents); 3141 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4); 3142 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8); 3143 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12); 3144 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16); 3145 } 3146 else 3147 { 3148 unsigned long addr; 3149 /* addr = .got + 4 */ 3150 addr = sgot->output_section->vma + sgot->output_offset + 4; 3151 bfd_put_32 (output_bfd, 3152 PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), 3153 splt->contents); 3154 bfd_put_32 (output_bfd, 3155 PLT0_ENTRY_WORD1 | (addr & 0xffff), 3156 splt->contents + 4); 3157 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); 3158 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); 3159 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); 3160 } 3161 3162 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 3163 PLT_ENTRY_SIZE; 3164 } 3165 } 3166 3167 /* Fill in the first three entries in the global offset table. */ 3168 if (sgot && sgot->size > 0) 3169 { 3170 if (sdyn == NULL) 3171 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 3172 else 3173 bfd_put_32 (output_bfd, 3174 sdyn->output_section->vma + sdyn->output_offset, 3175 sgot->contents); 3176 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); 3177 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); 3178 3179 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 3180 } 3181 3182 return true; 3183 } 3184 3185 3186 /* Set the right machine number. */ 3188 3189 static bool 3190 m32r_elf_object_p (bfd *abfd) 3191 { 3192 switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH) 3193 { 3194 default: 3195 case E_M32R_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32r); break; 3196 case E_M32RX_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32rx); break; 3197 case E_M32R2_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32r2); break; 3198 } 3199 return true; 3200 } 3201 3202 /* Store the machine number in the flags field. */ 3203 3204 static bool 3205 m32r_elf_final_write_processing (bfd *abfd) 3206 { 3207 unsigned long val; 3208 3209 switch (bfd_get_mach (abfd)) 3210 { 3211 default: 3212 case bfd_mach_m32r: val = E_M32R_ARCH; break; 3213 case bfd_mach_m32rx: val = E_M32RX_ARCH; break; 3214 case bfd_mach_m32r2: val = E_M32R2_ARCH; break; 3215 } 3216 3217 elf_elfheader (abfd)->e_flags &=~ EF_M32R_ARCH; 3218 elf_elfheader (abfd)->e_flags |= val; 3219 return _bfd_elf_final_write_processing (abfd); 3220 } 3221 3222 /* Function to keep M32R specific file flags. */ 3223 3224 static bool 3225 m32r_elf_set_private_flags (bfd *abfd, flagword flags) 3226 { 3227 BFD_ASSERT (!elf_flags_init (abfd) 3228 || elf_elfheader (abfd)->e_flags == flags); 3229 3230 elf_elfheader (abfd)->e_flags = flags; 3231 elf_flags_init (abfd) = true; 3232 return true; 3233 } 3234 3235 /* Merge backend specific data from an object file to the output 3236 object file when linking. */ 3237 3238 static bool 3239 m32r_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 3240 { 3241 bfd *obfd = info->output_bfd; 3242 flagword out_flags; 3243 flagword in_flags; 3244 3245 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour 3246 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 3247 return true; 3248 3249 in_flags = elf_elfheader (ibfd)->e_flags; 3250 out_flags = elf_elfheader (obfd)->e_flags; 3251 3252 if (! elf_flags_init (obfd)) 3253 { 3254 /* If the input is the default architecture then do not 3255 bother setting the flags for the output architecture, 3256 instead allow future merges to do this. If no future 3257 merges ever set these flags then they will retain their 3258 unitialised values, which surprise surprise, correspond 3259 to the default values. */ 3260 if (bfd_get_arch_info (ibfd)->the_default) 3261 return true; 3262 3263 elf_flags_init (obfd) = true; 3264 elf_elfheader (obfd)->e_flags = in_flags; 3265 3266 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) 3267 && bfd_get_arch_info (obfd)->the_default) 3268 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), 3269 bfd_get_mach (ibfd)); 3270 3271 return true; 3272 } 3273 3274 /* Check flag compatibility. */ 3275 if (in_flags == out_flags) 3276 return true; 3277 3278 if ((in_flags & EF_M32R_ARCH) != (out_flags & EF_M32R_ARCH)) 3279 { 3280 if ( ((in_flags & EF_M32R_ARCH) != E_M32R_ARCH) 3281 || ((out_flags & EF_M32R_ARCH) == E_M32R_ARCH) 3282 || ((in_flags & EF_M32R_ARCH) == E_M32R2_ARCH)) 3283 { 3284 _bfd_error_handler 3285 (_("%pB: instruction set mismatch with previous modules"), ibfd); 3286 3287 bfd_set_error (bfd_error_bad_value); 3288 return false; 3289 } 3290 } 3291 3292 return true; 3293 } 3294 3295 /* Display the flags field. */ 3296 3297 static bool 3298 m32r_elf_print_private_bfd_data (bfd *abfd, void * ptr) 3299 { 3300 FILE * file = (FILE *) ptr; 3301 3302 BFD_ASSERT (abfd != NULL && ptr != NULL); 3303 3304 _bfd_elf_print_private_bfd_data (abfd, ptr); 3305 3306 fprintf (file, _("private flags = %lx"), elf_elfheader (abfd)->e_flags); 3307 3308 switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH) 3309 { 3310 default: 3311 case E_M32R_ARCH: fprintf (file, _(": m32r instructions")); break; 3312 case E_M32RX_ARCH: fprintf (file, _(": m32rx instructions")); break; 3313 case E_M32R2_ARCH: fprintf (file, _(": m32r2 instructions")); break; 3314 } 3315 3316 fputc ('\n', file); 3317 3318 return true; 3319 } 3320 3321 static asection * 3322 m32r_elf_gc_mark_hook (asection *sec, 3323 struct bfd_link_info *info, 3324 Elf_Internal_Rela *rel, 3325 struct elf_link_hash_entry *h, 3326 Elf_Internal_Sym *sym) 3327 { 3328 if (h != NULL) 3329 switch (ELF32_R_TYPE (rel->r_info)) 3330 { 3331 case R_M32R_GNU_VTINHERIT: 3332 case R_M32R_GNU_VTENTRY: 3333 case R_M32R_RELA_GNU_VTINHERIT: 3334 case R_M32R_RELA_GNU_VTENTRY: 3335 return NULL; 3336 } 3337 3338 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 3339 } 3340 3341 /* Look through the relocs for a section during the first phase. 3342 Since we don't do .gots or .plts, we just need to consider the 3343 virtual table relocs for gc. */ 3344 3345 static bool 3346 m32r_elf_check_relocs (bfd *abfd, 3347 struct bfd_link_info *info, 3348 asection *sec, 3349 const Elf_Internal_Rela *relocs) 3350 { 3351 Elf_Internal_Shdr *symtab_hdr; 3352 struct elf_link_hash_entry **sym_hashes; 3353 const Elf_Internal_Rela *rel; 3354 const Elf_Internal_Rela *rel_end; 3355 struct elf_link_hash_table *htab; 3356 bfd *dynobj; 3357 asection *sreloc; 3358 3359 if (bfd_link_relocatable (info)) 3360 return true; 3361 3362 sreloc = NULL; 3363 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 3364 sym_hashes = elf_sym_hashes (abfd); 3365 3366 htab = m32r_elf_hash_table (info); 3367 if (htab == NULL) 3368 return false; 3369 3370 dynobj = htab->dynobj; 3371 3372 rel_end = relocs + sec->reloc_count; 3373 for (rel = relocs; rel < rel_end; rel++) 3374 { 3375 int r_type; 3376 struct elf_link_hash_entry *h; 3377 unsigned long r_symndx; 3378 3379 r_symndx = ELF32_R_SYM (rel->r_info); 3380 r_type = ELF32_R_TYPE (rel->r_info); 3381 if (r_symndx < symtab_hdr->sh_info) 3382 h = NULL; 3383 else 3384 { 3385 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3386 while (h->root.type == bfd_link_hash_indirect 3387 || h->root.type == bfd_link_hash_warning) 3388 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3389 } 3390 3391 /* Some relocs require a global offset table. */ 3392 if (htab->sgot == NULL) 3393 { 3394 switch (r_type) 3395 { 3396 case R_M32R_GOT16_HI_ULO: 3397 case R_M32R_GOT16_HI_SLO: 3398 case R_M32R_GOTOFF: 3399 case R_M32R_GOTOFF_HI_ULO: 3400 case R_M32R_GOTOFF_HI_SLO: 3401 case R_M32R_GOTOFF_LO: 3402 case R_M32R_GOT16_LO: 3403 case R_M32R_GOTPC24: 3404 case R_M32R_GOTPC_HI_ULO: 3405 case R_M32R_GOTPC_HI_SLO: 3406 case R_M32R_GOTPC_LO: 3407 case R_M32R_GOT24: 3408 if (dynobj == NULL) 3409 htab->dynobj = dynobj = abfd; 3410 if (!_bfd_elf_create_got_section (dynobj, info)) 3411 return false; 3412 break; 3413 3414 default: 3415 break; 3416 } 3417 } 3418 3419 switch (r_type) 3420 { 3421 case R_M32R_GOT16_HI_ULO: 3422 case R_M32R_GOT16_HI_SLO: 3423 case R_M32R_GOT16_LO: 3424 case R_M32R_GOT24: 3425 3426 if (h != NULL) 3427 h->got.refcount += 1; 3428 else 3429 { 3430 bfd_signed_vma *local_got_refcounts; 3431 3432 /* This is a global offset table entry for a local 3433 symbol. */ 3434 local_got_refcounts = elf_local_got_refcounts (abfd); 3435 if (local_got_refcounts == NULL) 3436 { 3437 bfd_size_type size; 3438 3439 size = symtab_hdr->sh_info; 3440 size *= sizeof (bfd_signed_vma); 3441 local_got_refcounts = bfd_zalloc (abfd, size); 3442 if (local_got_refcounts == NULL) 3443 return false; 3444 elf_local_got_refcounts (abfd) = local_got_refcounts; 3445 } 3446 local_got_refcounts[r_symndx] += 1; 3447 } 3448 break; 3449 3450 case R_M32R_26_PLTREL: 3451 /* This symbol requires a procedure linkage table entry. We 3452 actually build the entry in adjust_dynamic_symbol, 3453 because this might be a case of linking PIC code without 3454 linking in any dynamic objects, in which case we don't 3455 need to generate a procedure linkage table after all. */ 3456 3457 /* If this is a local symbol, we resolve it directly without 3458 creating a procedure linkage table entry. */ 3459 if (h == NULL) 3460 continue; 3461 3462 if (h->forced_local) 3463 break; 3464 3465 h->needs_plt = 1; 3466 h->plt.refcount += 1; 3467 break; 3468 3469 case R_M32R_16_RELA: 3470 case R_M32R_24_RELA: 3471 case R_M32R_32_RELA: 3472 case R_M32R_REL32: 3473 case R_M32R_HI16_ULO_RELA: 3474 case R_M32R_HI16_SLO_RELA: 3475 case R_M32R_LO16_RELA: 3476 case R_M32R_SDA16_RELA: 3477 case R_M32R_10_PCREL_RELA: 3478 case R_M32R_18_PCREL_RELA: 3479 case R_M32R_26_PCREL_RELA: 3480 3481 if (h != NULL && !bfd_link_pic (info)) 3482 { 3483 h->non_got_ref = 1; 3484 h->plt.refcount += 1; 3485 } 3486 3487 /* If we are creating a shared library, and this is a reloc 3488 against a global symbol, or a non PC relative reloc 3489 against a local symbol, then we need to copy the reloc 3490 into the shared library. However, if we are linking with 3491 -Bsymbolic, we do not need to copy a reloc against a 3492 global symbol which is defined in an object we are 3493 including in the link (i.e., DEF_REGULAR is set). At 3494 this point we have not seen all the input files, so it is 3495 possible that DEF_REGULAR is not set now but will be set 3496 later (it is never cleared). We account for that 3497 possibility below by storing information in the 3498 dyn_relocs field of the hash table entry. A similar 3499 situation occurs when creating shared libraries and symbol 3500 visibility changes render the symbol local. 3501 3502 If on the other hand, we are creating an executable, we 3503 may need to keep relocations for symbols satisfied by a 3504 dynamic library if we manage to avoid copy relocs for the 3505 symbol. */ 3506 if ((bfd_link_pic (info) 3507 && (sec->flags & SEC_ALLOC) != 0 3508 && (( r_type != R_M32R_26_PCREL_RELA 3509 && r_type != R_M32R_18_PCREL_RELA 3510 && r_type != R_M32R_10_PCREL_RELA 3511 && r_type != R_M32R_REL32) 3512 || (h != NULL 3513 && (! info->symbolic 3514 || h->root.type == bfd_link_hash_defweak 3515 || !h->def_regular)))) 3516 || (!bfd_link_pic (info) 3517 && (sec->flags & SEC_ALLOC) != 0 3518 && h != NULL 3519 && (h->root.type == bfd_link_hash_defweak 3520 || !h->def_regular))) 3521 { 3522 struct elf_dyn_relocs *p; 3523 struct elf_dyn_relocs **head; 3524 3525 if (dynobj == NULL) 3526 htab->dynobj = dynobj = abfd; 3527 3528 /* When creating a shared object, we must copy these 3529 relocs into the output file. We create a reloc 3530 section in dynobj and make room for the reloc. */ 3531 if (sreloc == NULL) 3532 { 3533 sreloc = _bfd_elf_make_dynamic_reloc_section 3534 (sec, dynobj, 2, abfd, /*rela?*/ true); 3535 3536 if (sreloc == NULL) 3537 return false; 3538 } 3539 3540 /* If this is a global symbol, we count the number of 3541 relocations we need for this symbol. */ 3542 if (h != NULL) 3543 head = &h->dyn_relocs; 3544 else 3545 { 3546 /* Track dynamic relocs needed for local syms too. */ 3547 asection *s; 3548 void *vpp; 3549 Elf_Internal_Sym *isym; 3550 3551 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 3552 abfd, r_symndx); 3553 if (isym == NULL) 3554 return false; 3555 3556 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 3557 if (s == NULL) 3558 s = sec; 3559 3560 vpp = &elf_section_data (s)->local_dynrel; 3561 head = (struct elf_dyn_relocs **) vpp; 3562 } 3563 3564 p = *head; 3565 if (p == NULL || p->sec != sec) 3566 { 3567 size_t amt = sizeof (*p); 3568 3569 p = bfd_alloc (dynobj, amt); 3570 if (p == NULL) 3571 return false; 3572 p->next = *head; 3573 *head = p; 3574 p->sec = sec; 3575 p->count = 0; 3576 p->pc_count = 0; 3577 } 3578 3579 p->count += 1; 3580 if ( ELF32_R_TYPE (rel->r_info) == R_M32R_26_PCREL_RELA 3581 || ELF32_R_TYPE (rel->r_info) == R_M32R_18_PCREL_RELA 3582 || ELF32_R_TYPE (rel->r_info) == R_M32R_10_PCREL_RELA 3583 || ELF32_R_TYPE (rel->r_info) == R_M32R_REL32) 3584 p->pc_count += 1; 3585 } 3586 break; 3587 3588 /* This relocation describes the C++ object vtable hierarchy. 3589 Reconstruct it for later use during GC. */ 3590 case R_M32R_RELA_GNU_VTINHERIT: 3591 case R_M32R_GNU_VTINHERIT: 3592 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 3593 return false; 3594 break; 3595 3596 /* This relocation describes which C++ vtable entries are actually 3597 used. Record for later use during GC. */ 3598 case R_M32R_GNU_VTENTRY: 3599 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) 3600 return false; 3601 break; 3602 case R_M32R_RELA_GNU_VTENTRY: 3603 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 3604 return false; 3605 break; 3606 } 3607 } 3608 3609 return true; 3610 } 3611 3612 static const struct bfd_elf_special_section m32r_elf_special_sections[] = 3613 { 3614 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 3615 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 3616 { NULL, 0, 0, 0, 0 } 3617 }; 3618 3619 static bool 3620 m32r_elf_section_flags (const Elf_Internal_Shdr *hdr) 3621 { 3622 const char *name = hdr->bfd_section->name; 3623 3624 if (startswith (name, ".sbss") 3625 || startswith (name, ".sdata")) 3626 hdr->bfd_section->flags |= SEC_SMALL_DATA; 3627 3628 return true; 3629 } 3630 3631 static enum elf_reloc_type_class 3632 m32r_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 3633 const asection *rel_sec ATTRIBUTE_UNUSED, 3634 const Elf_Internal_Rela *rela) 3635 { 3636 switch ((int) ELF32_R_TYPE (rela->r_info)) 3637 { 3638 case R_M32R_RELATIVE: return reloc_class_relative; 3639 case R_M32R_JMP_SLOT: return reloc_class_plt; 3640 case R_M32R_COPY: return reloc_class_copy; 3641 default: return reloc_class_normal; 3642 } 3643 } 3644 3645 #define ELF_ARCH bfd_arch_m32r 3647 #define ELF_TARGET_ID M32R_ELF_DATA 3648 #define ELF_MACHINE_CODE EM_M32R 3649 #define ELF_MACHINE_ALT1 EM_CYGNUS_M32R 3650 #define ELF_MAXPAGESIZE 0x1 /* Explicitly requested by Mitsubishi. */ 3651 3652 #define TARGET_BIG_SYM m32r_elf32_vec 3653 #define TARGET_BIG_NAME "elf32-m32r" 3654 #define TARGET_LITTLE_SYM m32r_elf32_le_vec 3655 #define TARGET_LITTLE_NAME "elf32-m32rle" 3656 3657 #define elf_info_to_howto m32r_info_to_howto 3658 #define elf_info_to_howto_rel m32r_info_to_howto_rel 3659 #define elf_backend_section_from_bfd_section _bfd_m32r_elf_section_from_bfd_section 3660 #define elf_backend_symbol_processing _bfd_m32r_elf_symbol_processing 3661 #define elf_backend_add_symbol_hook m32r_elf_add_symbol_hook 3662 #define elf_backend_relocate_section m32r_elf_relocate_section 3663 #define elf_backend_gc_mark_hook m32r_elf_gc_mark_hook 3664 #define elf_backend_check_relocs m32r_elf_check_relocs 3665 3666 #define elf_backend_create_dynamic_sections m32r_elf_create_dynamic_sections 3667 #define bfd_elf32_bfd_link_hash_table_create m32r_elf_link_hash_table_create 3668 #define elf_backend_size_dynamic_sections m32r_elf_size_dynamic_sections 3669 #define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all 3670 #define elf_backend_finish_dynamic_sections m32r_elf_finish_dynamic_sections 3671 #define elf_backend_adjust_dynamic_symbol m32r_elf_adjust_dynamic_symbol 3672 #define elf_backend_finish_dynamic_symbol m32r_elf_finish_dynamic_symbol 3673 #define elf_backend_reloc_type_class m32r_elf_reloc_type_class 3674 3675 #define elf_backend_can_gc_sections 1 3676 /*#if !USE_REL 3677 #define elf_backend_rela_normal 1 3678 #endif*/ 3679 #define elf_backend_can_refcount 1 3680 #define elf_backend_want_got_plt 1 3681 #define elf_backend_plt_readonly 1 3682 #define elf_backend_want_plt_sym 0 3683 #define elf_backend_got_header_size 12 3684 #define elf_backend_dtrel_excludes_plt 1 3685 3686 #define elf_backend_may_use_rel_p 1 3687 #ifdef USE_M32R_OLD_RELOC 3688 #define elf_backend_default_use_rela_p 0 3689 #define elf_backend_may_use_rela_p 0 3690 #else 3691 #define elf_backend_default_use_rela_p 1 3692 #define elf_backend_may_use_rela_p 1 3693 #endif 3694 3695 #define elf_backend_object_p m32r_elf_object_p 3696 #define elf_backend_final_write_processing m32r_elf_final_write_processing 3697 #define bfd_elf32_bfd_merge_private_bfd_data m32r_elf_merge_private_bfd_data 3698 #define bfd_elf32_bfd_set_private_flags m32r_elf_set_private_flags 3699 #define bfd_elf32_bfd_print_private_bfd_data m32r_elf_print_private_bfd_data 3700 #define elf_backend_special_sections m32r_elf_special_sections 3701 #define elf_backend_section_flags m32r_elf_section_flags 3702 3703 #define elf_backend_linux_prpsinfo32_ugid16 true 3704 3705 #include "elf32-target.h" 3706 3707 #undef ELF_MAXPAGESIZE 3708 #define ELF_MAXPAGESIZE 0x1000 3709 3710 #undef TARGET_BIG_SYM 3711 #define TARGET_BIG_SYM m32r_elf32_linux_vec 3712 #undef TARGET_BIG_NAME 3713 #define TARGET_BIG_NAME "elf32-m32r-linux" 3714 #undef TARGET_LITTLE_SYM 3715 #define TARGET_LITTLE_SYM m32r_elf32_linux_le_vec 3716 #undef TARGET_LITTLE_NAME 3717 #define TARGET_LITTLE_NAME "elf32-m32rle-linux" 3718 #undef elf32_bed 3719 #define elf32_bed elf32_m32r_lin_bed 3720 3721 #include "elf32-target.h" 3722
Indexes created Mon Sep 14 00:24:24 UTC 2026