1 /* M32R-specific support for 32-bit ELF. 2 Copyright (C) 1996-2016 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 (reloc_entry->howto->size) 225 { 226 case 1: 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 2: 234 { 235 unsigned long x = bfd_get_32 (input_bfd, inplace_address); 236 DOIT (x); 237 bfd_put_32 (input_bfd, (bfd_vma)x , inplace_address); 238 } 239 break; 240 default: 241 BFD_ASSERT (0); 242 } 243 244 if (output_bfd != NULL) 245 reloc_entry->address += input_section->output_offset; 246 247 return ret; 248 } 249 250 /* Handle the R_M32R_SDA16 reloc. 251 This reloc is used to compute the address of objects in the small data area 252 and to perform loads and stores from that area. 253 The lower 16 bits are sign extended and added to the register specified 254 in the instruction, which is assumed to point to _SDA_BASE_. */ 255 256 static bfd_reloc_status_type 257 m32r_elf_sda16_reloc (bfd *abfd ATTRIBUTE_UNUSED, 258 arelent *reloc_entry, 259 asymbol *symbol, 260 void * data ATTRIBUTE_UNUSED, 261 asection *input_section, 262 bfd *output_bfd, 263 char **error_message ATTRIBUTE_UNUSED) 264 { 265 /* This part is from bfd_elf_generic_reloc. */ 266 if (output_bfd != NULL 267 && (symbol->flags & BSF_SECTION_SYM) == 0 268 && (! reloc_entry->howto->partial_inplace 269 || reloc_entry->addend == 0)) 270 { 271 reloc_entry->address += input_section->output_offset; 272 return bfd_reloc_ok; 273 } 274 275 if (output_bfd != NULL) 276 /* FIXME: See bfd_perform_relocation. Is this right? */ 277 return bfd_reloc_continue; 278 279 /* FIXME: not sure what to do here yet. But then again, the linker 280 may never call us. */ 281 abort (); 282 } 283 284 285 /* Handle the R_M32R_HI16_[SU]LO relocs. 286 HI16_SLO is for the add3 and load/store with displacement instructions. 287 HI16_ULO is for the or3 instruction. 288 For R_M32R_HI16_SLO, the lower 16 bits are sign extended when added to 289 the high 16 bytes so if the lower 16 bits are negative (bit 15 == 1) then 290 we must add one to the high 16 bytes (which will get subtracted off when 291 the low 16 bits are added). 292 These relocs have to be done in combination with an R_M32R_LO16 reloc 293 because there is a carry from the LO16 to the HI16. Here we just save 294 the information we need; we do the actual relocation when we see the LO16. 295 This code is copied from the elf32-mips.c. We also support an arbitrary 296 number of HI16 relocs to be associated with a single LO16 reloc. The 297 assembler sorts the relocs to ensure each HI16 immediately precedes its 298 LO16. However if there are multiple copies, the assembler may not find 299 the real LO16 so it picks the first one it finds. */ 300 301 struct m32r_hi16 302 { 303 struct m32r_hi16 *next; 304 bfd_byte *addr; 305 bfd_vma addend; 306 }; 307 308 /* FIXME: This should not be a static variable. */ 309 310 static struct m32r_hi16 *m32r_hi16_list; 311 312 static bfd_reloc_status_type 313 m32r_elf_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED, 314 arelent *reloc_entry, 315 asymbol *symbol, 316 void * data, 317 asection *input_section, 318 bfd *output_bfd, 319 char **error_message ATTRIBUTE_UNUSED) 320 { 321 bfd_reloc_status_type ret; 322 bfd_vma relocation; 323 struct m32r_hi16 *n; 324 325 /* This part is from bfd_elf_generic_reloc. 326 If we're relocating, and this an external symbol, we don't want 327 to change anything. */ 328 if (output_bfd != NULL 329 && (symbol->flags & BSF_SECTION_SYM) == 0 330 && reloc_entry->addend == 0) 331 { 332 reloc_entry->address += input_section->output_offset; 333 return bfd_reloc_ok; 334 } 335 336 /* Sanity check the address (offset in section). */ 337 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 338 return bfd_reloc_outofrange; 339 340 ret = bfd_reloc_ok; 341 if (bfd_is_und_section (symbol->section) 342 && output_bfd == NULL) 343 ret = bfd_reloc_undefined; 344 345 if (bfd_is_com_section (symbol->section)) 346 relocation = 0; 347 else 348 relocation = symbol->value; 349 350 relocation += symbol->section->output_section->vma; 351 relocation += symbol->section->output_offset; 352 relocation += reloc_entry->addend; 353 354 /* Save the information, and let LO16 do the actual relocation. */ 355 n = bfd_malloc ((bfd_size_type) sizeof *n); 356 if (n == NULL) 357 return bfd_reloc_outofrange; 358 n->addr = (bfd_byte *) data + reloc_entry->address; 359 n->addend = relocation; 360 n->next = m32r_hi16_list; 361 m32r_hi16_list = n; 362 363 if (output_bfd != NULL) 364 reloc_entry->address += input_section->output_offset; 365 366 return ret; 367 } 368 369 /* Handle an M32R ELF HI16 reloc. */ 370 371 static void 372 m32r_elf_relocate_hi16 (bfd *input_bfd, 373 int type, 374 Elf_Internal_Rela *relhi, 375 Elf_Internal_Rela *rello, 376 bfd_byte *contents, 377 bfd_vma addend) 378 { 379 unsigned long insn; 380 bfd_vma addlo; 381 382 insn = bfd_get_32 (input_bfd, contents + relhi->r_offset); 383 384 addlo = bfd_get_32 (input_bfd, contents + rello->r_offset); 385 if (type == R_M32R_HI16_SLO) 386 addlo = ((addlo & 0xffff) ^ 0x8000) - 0x8000; 387 else 388 addlo &= 0xffff; 389 390 addend += ((insn & 0xffff) << 16) + addlo; 391 392 /* Reaccount for sign extension of low part. */ 393 if (type == R_M32R_HI16_SLO 394 && (addend & 0x8000) != 0) 395 addend += 0x10000; 396 397 bfd_put_32 (input_bfd, 398 (insn & 0xffff0000) | ((addend >> 16) & 0xffff), 399 contents + relhi->r_offset); 400 } 401 402 /* Do an R_M32R_LO16 relocation. This is a straightforward 16 bit 403 inplace relocation; this function exists in order to do the 404 R_M32R_HI16_[SU]LO relocation described above. */ 405 406 static bfd_reloc_status_type 407 m32r_elf_lo16_reloc (bfd *input_bfd, 408 arelent *reloc_entry, 409 asymbol *symbol, 410 void * data, 411 asection *input_section, 412 bfd *output_bfd, 413 char **error_message) 414 { 415 /* This part is from bfd_elf_generic_reloc. 416 If we're relocating, and this an external symbol, we don't want 417 to change anything. */ 418 if (output_bfd != NULL 419 && (symbol->flags & BSF_SECTION_SYM) == 0 420 && reloc_entry->addend == 0) 421 { 422 reloc_entry->address += input_section->output_offset; 423 return bfd_reloc_ok; 424 } 425 426 if (m32r_hi16_list != NULL) 427 { 428 struct m32r_hi16 *l; 429 430 l = m32r_hi16_list; 431 while (l != NULL) 432 { 433 unsigned long insn; 434 unsigned long val; 435 unsigned long vallo; 436 struct m32r_hi16 *next; 437 438 /* Do the HI16 relocation. Note that we actually don't need 439 to know anything about the LO16 itself, except where to 440 find the low 16 bits of the addend needed by the LO16. */ 441 insn = bfd_get_32 (input_bfd, l->addr); 442 vallo = ((bfd_get_32 (input_bfd, (bfd_byte *) data + reloc_entry->address) 443 & 0xffff) ^ 0x8000) - 0x8000; 444 val = ((insn & 0xffff) << 16) + vallo; 445 val += l->addend; 446 447 /* Reaccount for sign extension of low part. */ 448 if ((val & 0x8000) != 0) 449 val += 0x10000; 450 451 insn = (insn &~ (bfd_vma) 0xffff) | ((val >> 16) & 0xffff); 452 bfd_put_32 (input_bfd, (bfd_vma) insn, l->addr); 453 454 next = l->next; 455 free (l); 456 l = next; 457 } 458 459 m32r_hi16_list = NULL; 460 } 461 462 /* Now do the LO16 reloc in the usual way. 463 ??? It would be nice to call bfd_elf_generic_reloc here, 464 but we have partial_inplace set. bfd_elf_generic_reloc will 465 pass the handling back to bfd_install_relocation which will install 466 a section relative addend which is wrong. */ 467 return m32r_elf_generic_reloc (input_bfd, reloc_entry, symbol, data, 468 input_section, output_bfd, error_message); 469 } 470 471 472 static reloc_howto_type m32r_elf_howto_table[] = 473 { 474 /* This reloc does nothing. */ 475 HOWTO (R_M32R_NONE, /* type */ 476 0, /* rightshift */ 477 3, /* size (0 = byte, 1 = short, 2 = long) */ 478 0, /* bitsize */ 479 FALSE, /* pc_relative */ 480 0, /* bitpos */ 481 complain_overflow_dont, /* complain_on_overflow */ 482 bfd_elf_generic_reloc, /* special_function */ 483 "R_M32R_NONE", /* name */ 484 FALSE, /* partial_inplace */ 485 0, /* src_mask */ 486 0, /* dst_mask */ 487 FALSE), /* pcrel_offset */ 488 489 /* A 16 bit absolute relocation. */ 490 HOWTO (R_M32R_16, /* type */ 491 0, /* rightshift */ 492 1, /* size (0 = byte, 1 = short, 2 = long) */ 493 16, /* bitsize */ 494 FALSE, /* pc_relative */ 495 0, /* bitpos */ 496 complain_overflow_bitfield, /* complain_on_overflow */ 497 m32r_elf_generic_reloc,/* special_function */ 498 "R_M32R_16", /* name */ 499 TRUE, /* partial_inplace */ 500 0xffff, /* src_mask */ 501 0xffff, /* dst_mask */ 502 FALSE), /* pcrel_offset */ 503 504 /* A 32 bit absolute relocation. */ 505 HOWTO (R_M32R_32, /* type */ 506 0, /* rightshift */ 507 2, /* size (0 = byte, 1 = short, 2 = long) */ 508 32, /* bitsize */ 509 FALSE, /* pc_relative */ 510 0, /* bitpos */ 511 complain_overflow_bitfield, /* complain_on_overflow */ 512 m32r_elf_generic_reloc,/* special_function */ 513 "R_M32R_32", /* name */ 514 TRUE, /* partial_inplace */ 515 0xffffffff, /* src_mask */ 516 0xffffffff, /* dst_mask */ 517 FALSE), /* pcrel_offset */ 518 519 /* A 24 bit address. */ 520 HOWTO (R_M32R_24, /* type */ 521 0, /* rightshift */ 522 2, /* size (0 = byte, 1 = short, 2 = long) */ 523 24, /* bitsize */ 524 FALSE, /* pc_relative */ 525 0, /* bitpos */ 526 complain_overflow_unsigned, /* complain_on_overflow */ 527 m32r_elf_generic_reloc,/* special_function */ 528 "R_M32R_24", /* name */ 529 TRUE, /* partial_inplace */ 530 0xffffff, /* src_mask */ 531 0xffffff, /* dst_mask */ 532 FALSE), /* pcrel_offset */ 533 534 /* An PC Relative 10-bit relocation, shifted by 2. 535 This reloc is complicated because relocations are relative to pc & -4. 536 i.e. branches in the right insn slot use the address of the left insn 537 slot for pc. */ 538 /* ??? It's not clear whether this should have partial_inplace set or not. 539 Branch relaxing in the assembler can store the addend in the insn, 540 and if bfd_install_relocation gets called the addend may get added 541 again. */ 542 HOWTO (R_M32R_10_PCREL, /* type */ 543 2, /* rightshift */ 544 1, /* size (0 = byte, 1 = short, 2 = long) */ 545 10, /* bitsize */ 546 TRUE, /* pc_relative */ 547 0, /* bitpos */ 548 complain_overflow_signed, /* complain_on_overflow */ 549 m32r_elf_10_pcrel_reloc, /* special_function */ 550 "R_M32R_10_PCREL", /* name */ 551 FALSE, /* partial_inplace */ 552 0xff, /* src_mask */ 553 0xff, /* dst_mask */ 554 TRUE), /* pcrel_offset */ 555 556 /* A relative 18 bit relocation, right shifted by 2. */ 557 HOWTO (R_M32R_18_PCREL, /* type */ 558 2, /* rightshift */ 559 2, /* size (0 = byte, 1 = short, 2 = long) */ 560 16, /* bitsize */ 561 TRUE, /* pc_relative */ 562 0, /* bitpos */ 563 complain_overflow_signed, /* complain_on_overflow */ 564 bfd_elf_generic_reloc, /* special_function */ 565 "R_M32R_18_PCREL", /* name */ 566 FALSE, /* partial_inplace */ 567 0xffff, /* src_mask */ 568 0xffff, /* dst_mask */ 569 TRUE), /* pcrel_offset */ 570 571 /* A relative 26 bit relocation, right shifted by 2. */ 572 /* ??? It's not clear whether this should have partial_inplace set or not. 573 Branch relaxing in the assembler can store the addend in the insn, 574 and if bfd_install_relocation gets called the addend may get added 575 again. */ 576 HOWTO (R_M32R_26_PCREL, /* type */ 577 2, /* rightshift */ 578 2, /* size (0 = byte, 1 = short, 2 = long) */ 579 26, /* bitsize */ 580 TRUE, /* pc_relative */ 581 0, /* bitpos */ 582 complain_overflow_signed, /* complain_on_overflow */ 583 bfd_elf_generic_reloc, /* special_function */ 584 "R_M32R_26_PCREL", /* name */ 585 FALSE, /* partial_inplace */ 586 0xffffff, /* src_mask */ 587 0xffffff, /* dst_mask */ 588 TRUE), /* pcrel_offset */ 589 590 /* High 16 bits of address when lower 16 is or'd in. */ 591 HOWTO (R_M32R_HI16_ULO, /* type */ 592 16, /* rightshift */ 593 2, /* size (0 = byte, 1 = short, 2 = long) */ 594 16, /* bitsize */ 595 FALSE, /* pc_relative */ 596 0, /* bitpos */ 597 complain_overflow_dont, /* complain_on_overflow */ 598 m32r_elf_hi16_reloc, /* special_function */ 599 "R_M32R_HI16_ULO", /* name */ 600 TRUE, /* partial_inplace */ 601 0x0000ffff, /* src_mask */ 602 0x0000ffff, /* dst_mask */ 603 FALSE), /* pcrel_offset */ 604 605 /* High 16 bits of address when lower 16 is added in. */ 606 HOWTO (R_M32R_HI16_SLO, /* type */ 607 16, /* rightshift */ 608 2, /* size (0 = byte, 1 = short, 2 = long) */ 609 16, /* bitsize */ 610 FALSE, /* pc_relative */ 611 0, /* bitpos */ 612 complain_overflow_dont, /* complain_on_overflow */ 613 m32r_elf_hi16_reloc, /* special_function */ 614 "R_M32R_HI16_SLO", /* name */ 615 TRUE, /* partial_inplace */ 616 0x0000ffff, /* src_mask */ 617 0x0000ffff, /* dst_mask */ 618 FALSE), /* pcrel_offset */ 619 620 /* Lower 16 bits of address. */ 621 HOWTO (R_M32R_LO16, /* type */ 622 0, /* rightshift */ 623 2, /* size (0 = byte, 1 = short, 2 = long) */ 624 16, /* bitsize */ 625 FALSE, /* pc_relative */ 626 0, /* bitpos */ 627 complain_overflow_dont, /* complain_on_overflow */ 628 m32r_elf_lo16_reloc, /* special_function */ 629 "R_M32R_LO16", /* name */ 630 TRUE, /* partial_inplace */ 631 0x0000ffff, /* src_mask */ 632 0x0000ffff, /* dst_mask */ 633 FALSE), /* pcrel_offset */ 634 635 /* Small data area 16 bits offset. */ 636 HOWTO (R_M32R_SDA16, /* type */ 637 0, /* rightshift */ 638 2, /* size (0 = byte, 1 = short, 2 = long) */ 639 16, /* bitsize */ 640 FALSE, /* pc_relative */ 641 0, /* bitpos */ 642 complain_overflow_signed, /* complain_on_overflow */ 643 m32r_elf_sda16_reloc, /* special_function */ 644 "R_M32R_SDA16", /* name */ 645 TRUE, /* partial_inplace */ /* FIXME: correct? */ 646 0x0000ffff, /* src_mask */ 647 0x0000ffff, /* dst_mask */ 648 FALSE), /* pcrel_offset */ 649 650 /* GNU extension to record C++ vtable hierarchy. */ 651 HOWTO (R_M32R_GNU_VTINHERIT, /* type */ 652 0, /* rightshift */ 653 2, /* size (0 = byte, 1 = short, 2 = long) */ 654 0, /* bitsize */ 655 FALSE, /* pc_relative */ 656 0, /* bitpos */ 657 complain_overflow_dont, /* complain_on_overflow */ 658 NULL, /* special_function */ 659 "R_M32R_GNU_VTINHERIT", /* name */ 660 FALSE, /* partial_inplace */ 661 0, /* src_mask */ 662 0, /* dst_mask */ 663 FALSE), /* pcrel_offset */ 664 665 /* GNU extension to record C++ vtable member usage. */ 666 HOWTO (R_M32R_GNU_VTENTRY, /* type */ 667 0, /* rightshift */ 668 2, /* size (0 = byte, 1 = short, 2 = long) */ 669 0, /* bitsize */ 670 FALSE, /* pc_relative */ 671 0, /* bitpos */ 672 complain_overflow_dont, /* complain_on_overflow */ 673 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 674 "R_M32R_GNU_VTENTRY", /* name */ 675 FALSE, /* partial_inplace */ 676 0, /* src_mask */ 677 0, /* dst_mask */ 678 FALSE), /* pcrel_offset */ 679 680 EMPTY_HOWTO (13), 681 EMPTY_HOWTO (14), 682 EMPTY_HOWTO (15), 683 EMPTY_HOWTO (16), 684 EMPTY_HOWTO (17), 685 EMPTY_HOWTO (18), 686 EMPTY_HOWTO (19), 687 EMPTY_HOWTO (20), 688 EMPTY_HOWTO (21), 689 EMPTY_HOWTO (22), 690 EMPTY_HOWTO (23), 691 EMPTY_HOWTO (24), 692 EMPTY_HOWTO (25), 693 EMPTY_HOWTO (26), 694 EMPTY_HOWTO (27), 695 EMPTY_HOWTO (28), 696 EMPTY_HOWTO (29), 697 EMPTY_HOWTO (30), 698 EMPTY_HOWTO (31), 699 EMPTY_HOWTO (32), 700 701 /* A 16 bit absolute relocation. */ 702 HOWTO (R_M32R_16_RELA, /* type */ 703 0, /* rightshift */ 704 1, /* size (0 = byte, 1 = short, 2 = long) */ 705 16, /* bitsize */ 706 FALSE, /* pc_relative */ 707 0, /* bitpos */ 708 complain_overflow_bitfield, /* complain_on_overflow */ 709 bfd_elf_generic_reloc, /* special_function */ 710 "R_M32R_16_RELA", /* name */ 711 FALSE, /* partial_inplace */ 712 0xffff, /* src_mask */ 713 0xffff, /* dst_mask */ 714 FALSE), /* pcrel_offset */ 715 716 /* A 32 bit absolute relocation. */ 717 HOWTO (R_M32R_32_RELA, /* type */ 718 0, /* rightshift */ 719 2, /* size (0 = byte, 1 = short, 2 = long) */ 720 32, /* bitsize */ 721 FALSE, /* pc_relative */ 722 0, /* bitpos */ 723 complain_overflow_bitfield, /* complain_on_overflow */ 724 bfd_elf_generic_reloc,/* special_function */ 725 "R_M32R_32_RELA", /* name */ 726 FALSE, /* partial_inplace */ 727 0xffffffff, /* src_mask */ 728 0xffffffff, /* dst_mask */ 729 FALSE), /* pcrel_offset */ 730 731 /* A 24 bit address. */ 732 HOWTO (R_M32R_24_RELA, /* type */ 733 0, /* rightshift */ 734 2, /* size (0 = byte, 1 = short, 2 = long) */ 735 24, /* bitsize */ 736 FALSE, /* pc_relative */ 737 0, /* bitpos */ 738 complain_overflow_unsigned, /* complain_on_overflow */ 739 bfd_elf_generic_reloc,/* special_function */ 740 "R_M32R_24_RELA", /* name */ 741 FALSE, /* partial_inplace */ 742 0xffffff, /* src_mask */ 743 0xffffff, /* dst_mask */ 744 FALSE), /* pcrel_offset */ 745 746 HOWTO (R_M32R_10_PCREL_RELA, /* type */ 747 2, /* rightshift */ 748 1, /* size (0 = byte, 1 = short, 2 = long) */ 749 10, /* bitsize */ 750 TRUE, /* pc_relative */ 751 0, /* bitpos */ 752 complain_overflow_signed, /* complain_on_overflow */ 753 m32r_elf_10_pcrel_reloc, /* special_function */ 754 "R_M32R_10_PCREL_RELA",/* name */ 755 FALSE, /* partial_inplace */ 756 0xff, /* src_mask */ 757 0xff, /* dst_mask */ 758 TRUE), /* pcrel_offset */ 759 760 /* A relative 18 bit relocation, right shifted by 2. */ 761 HOWTO (R_M32R_18_PCREL_RELA, /* type */ 762 2, /* rightshift */ 763 2, /* size (0 = byte, 1 = short, 2 = long) */ 764 16, /* bitsize */ 765 TRUE, /* pc_relative */ 766 0, /* bitpos */ 767 complain_overflow_signed, /* complain_on_overflow */ 768 bfd_elf_generic_reloc, /* special_function */ 769 "R_M32R_18_PCREL_RELA",/* name */ 770 FALSE, /* partial_inplace */ 771 0xffff, /* src_mask */ 772 0xffff, /* dst_mask */ 773 TRUE), /* pcrel_offset */ 774 775 /* A relative 26 bit relocation, right shifted by 2. */ 776 HOWTO (R_M32R_26_PCREL_RELA, /* type */ 777 2, /* rightshift */ 778 2, /* size (0 = byte, 1 = short, 2 = long) */ 779 26, /* bitsize */ 780 TRUE, /* pc_relative */ 781 0, /* bitpos */ 782 complain_overflow_signed, /* complain_on_overflow */ 783 bfd_elf_generic_reloc, /* special_function */ 784 "R_M32R_26_PCREL_RELA",/* name */ 785 FALSE, /* partial_inplace */ 786 0xffffff, /* src_mask */ 787 0xffffff, /* dst_mask */ 788 TRUE), /* pcrel_offset */ 789 790 /* High 16 bits of address when lower 16 is or'd in. */ 791 HOWTO (R_M32R_HI16_ULO_RELA, /* type */ 792 16, /* rightshift */ 793 2, /* size (0 = byte, 1 = short, 2 = long) */ 794 16, /* bitsize */ 795 FALSE, /* pc_relative */ 796 0, /* bitpos */ 797 complain_overflow_dont, /* complain_on_overflow */ 798 bfd_elf_generic_reloc, /* special_function */ 799 "R_M32R_HI16_ULO_RELA",/* name */ 800 FALSE, /* partial_inplace */ 801 0x0000ffff, /* src_mask */ 802 0x0000ffff, /* dst_mask */ 803 FALSE), /* pcrel_offset */ 804 805 /* High 16 bits of address when lower 16 is added in. */ 806 HOWTO (R_M32R_HI16_SLO_RELA, /* type */ 807 16, /* rightshift */ 808 2, /* size (0 = byte, 1 = short, 2 = long) */ 809 16, /* bitsize */ 810 FALSE, /* pc_relative */ 811 0, /* bitpos */ 812 complain_overflow_dont, /* complain_on_overflow */ 813 bfd_elf_generic_reloc, /* special_function */ 814 "R_M32R_HI16_SLO_RELA",/* name */ 815 FALSE, /* partial_inplace */ 816 0x0000ffff, /* src_mask */ 817 0x0000ffff, /* dst_mask */ 818 FALSE), /* pcrel_offset */ 819 820 /* Lower 16 bits of address. */ 821 HOWTO (R_M32R_LO16_RELA, /* type */ 822 0, /* rightshift */ 823 2, /* size (0 = byte, 1 = short, 2 = long) */ 824 16, /* bitsize */ 825 FALSE, /* pc_relative */ 826 0, /* bitpos */ 827 complain_overflow_dont, /* complain_on_overflow */ 828 bfd_elf_generic_reloc, /* special_function */ 829 "R_M32R_LO16_RELA", /* name */ 830 FALSE, /* partial_inplace */ 831 0x0000ffff, /* src_mask */ 832 0x0000ffff, /* dst_mask */ 833 FALSE), /* pcrel_offset */ 834 835 /* Small data area 16 bits offset. */ 836 HOWTO (R_M32R_SDA16_RELA, /* type */ 837 0, /* rightshift */ 838 2, /* size (0 = byte, 1 = short, 2 = long) */ 839 16, /* bitsize */ 840 FALSE, /* pc_relative */ 841 0, /* bitpos */ 842 complain_overflow_signed, /* complain_on_overflow */ 843 bfd_elf_generic_reloc, /* special_function */ 844 "R_M32R_SDA16_RELA", /* name */ 845 TRUE, /* partial_inplace */ /* FIXME: correct? */ 846 0x0000ffff, /* src_mask */ 847 0x0000ffff, /* dst_mask */ 848 FALSE), /* pcrel_offset */ 849 850 /* GNU extension to record C++ vtable hierarchy. */ 851 HOWTO (R_M32R_RELA_GNU_VTINHERIT, /* type */ 852 0, /* rightshift */ 853 2, /* size (0 = byte, 1 = short, 2 = long) */ 854 0, /* bitsize */ 855 FALSE, /* pc_relative */ 856 0, /* bitpos */ 857 complain_overflow_dont, /* complain_on_overflow */ 858 NULL, /* special_function */ 859 "R_M32R_RELA_GNU_VTINHERIT", /* name */ 860 FALSE, /* partial_inplace */ 861 0, /* src_mask */ 862 0, /* dst_mask */ 863 FALSE), /* pcrel_offset */ 864 865 /* GNU extension to record C++ vtable member usage. */ 866 HOWTO (R_M32R_RELA_GNU_VTENTRY, /* type */ 867 0, /* rightshift */ 868 2, /* size (0 = byte, 1 = short, 2 = long) */ 869 0, /* bitsize */ 870 FALSE, /* pc_relative */ 871 0, /* bitpos */ 872 complain_overflow_dont, /* complain_on_overflow */ 873 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 874 "R_M32R_RELA_GNU_VTENTRY", /* name */ 875 FALSE, /* partial_inplace */ 876 0, /* src_mask */ 877 0, /* dst_mask */ 878 FALSE), /* pcrel_offset */ 879 880 /* A 32 bit PC relative relocation. */ 881 HOWTO (R_M32R_REL32, /* type */ 882 0, /* rightshift */ 883 2, /* size (0 = byte, 1 = short, 2 = long) */ 884 32, /* bitsize */ 885 TRUE, /* pc_relative */ 886 0, /* bitpos */ 887 complain_overflow_bitfield, /* complain_on_overflow */ 888 bfd_elf_generic_reloc,/* special_function */ 889 "R_M32R_REL32", /* name */ 890 FALSE, /* partial_inplace */ 891 0xffffffff, /* src_mask */ 892 0xffffffff, /* dst_mask */ 893 TRUE), /* pcrel_offset */ 894 895 EMPTY_HOWTO (46), 896 EMPTY_HOWTO (47), 897 898 /* Like R_M32R_24, but referring to the GOT table entry for 899 the symbol. */ 900 HOWTO (R_M32R_GOT24, /* type */ 901 0, /* rightshift */ 902 2, /* size (0 = byte, 1 = short, 2 = long) */ 903 24, /* bitsize */ 904 FALSE, /* pc_relative */ 905 0, /* bitpos */ 906 complain_overflow_unsigned, /* complain_on_overflow */ 907 bfd_elf_generic_reloc, /* special_function */ 908 "R_M32R_GOT24", /* name */ 909 FALSE, /* partial_inplace */ 910 0xffffff, /* src_mask */ 911 0xffffff, /* dst_mask */ 912 FALSE), /* pcrel_offset */ 913 914 /* Like R_M32R_PCREL, but referring to the procedure linkage table 915 entry for the symbol. */ 916 HOWTO (R_M32R_26_PLTREL, /* type */ 917 2, /* rightshift */ 918 2, /* size (0 = byte, 1 = short, 2 = long) */ 919 24, /* bitsize */ 920 TRUE, /* pc_relative */ 921 0, /* bitpos */ 922 complain_overflow_signed, /* complain_on_overflow */ 923 bfd_elf_generic_reloc, /* special_function */ 924 "R_M32R_26_PLTREL", /* name */ 925 FALSE, /* partial_inplace */ 926 0xffffff, /* src_mask */ 927 0xffffff, /* dst_mask */ 928 TRUE), /* pcrel_offset */ 929 930 /* This is used only by the dynamic linker. The symbol should exist 931 both in the object being run and in some shared library. The 932 dynamic linker copies the data addressed by the symbol from the 933 shared library into the object, because the object being 934 run has to have the data at some particular address. */ 935 HOWTO (R_M32R_COPY, /* type */ 936 0, /* rightshift */ 937 2, /* size (0 = byte, 1 = short, 2 = long) */ 938 32, /* bitsize */ 939 FALSE, /* pc_relative */ 940 0, /* bitpos */ 941 complain_overflow_bitfield, /* complain_on_overflow */ 942 bfd_elf_generic_reloc, /* special_function */ 943 "R_M32R_COPY", /* name */ 944 FALSE, /* partial_inplace */ 945 0xffffffff, /* src_mask */ 946 0xffffffff, /* dst_mask */ 947 FALSE), /* pcrel_offset */ 948 949 /* Like R_M32R_24, but used when setting global offset table 950 entries. */ 951 HOWTO (R_M32R_GLOB_DAT, /* type */ 952 0, /* rightshift */ 953 2, /* size (0 = byte, 1 = short, 2 = long) */ 954 32, /* bitsize */ 955 FALSE, /* pc_relative */ 956 0, /* bitpos */ 957 complain_overflow_bitfield, /* complain_on_overflow */ 958 bfd_elf_generic_reloc, /* special_function */ 959 "R_M32R_GLOB_DAT", /* name */ 960 FALSE, /* partial_inplace */ 961 0xffffffff, /* src_mask */ 962 0xffffffff, /* dst_mask */ 963 FALSE), /* pcrel_offset */ 964 965 /* Marks a procedure linkage table entry for a symbol. */ 966 HOWTO (R_M32R_JMP_SLOT, /* type */ 967 0, /* rightshift */ 968 2, /* size (0 = byte, 1 = short, 2 = long) */ 969 32, /* bitsize */ 970 FALSE, /* pc_relative */ 971 0, /* bitpos */ 972 complain_overflow_bitfield, /* complain_on_overflow */ 973 bfd_elf_generic_reloc, /* special_function */ 974 "R_M32R_JMP_SLOT", /* name */ 975 FALSE, /* partial_inplace */ 976 0xffffffff, /* src_mask */ 977 0xffffffff, /* dst_mask */ 978 FALSE), /* pcrel_offset */ 979 980 /* Used only by the dynamic linker. When the object is run, this 981 longword is set to the load address of the object, plus the 982 addend. */ 983 HOWTO (R_M32R_RELATIVE, /* type */ 984 0, /* rightshift */ 985 2, /* size (0 = byte, 1 = short, 2 = long) */ 986 32, /* bitsize */ 987 FALSE, /* pc_relative */ 988 0, /* bitpos */ 989 complain_overflow_bitfield, /* complain_on_overflow */ 990 bfd_elf_generic_reloc, /* special_function */ 991 "R_M32R_RELATIVE", /* name */ 992 FALSE, /* partial_inplace */ 993 0xffffffff, /* src_mask */ 994 0xffffffff, /* dst_mask */ 995 FALSE), /* pcrel_offset */ 996 997 HOWTO (R_M32R_GOTOFF, /* type */ 998 0, /* rightshift */ 999 2, /* size (0 = byte, 1 = short, 2 = long) */ 1000 24, /* bitsize */ 1001 FALSE, /* pc_relative */ 1002 0, /* bitpos */ 1003 complain_overflow_bitfield, /* complain_on_overflow */ 1004 bfd_elf_generic_reloc, /* special_function */ 1005 "R_M32R_GOTOFF", /* name */ 1006 FALSE, /* partial_inplace */ 1007 0xffffff, /* src_mask */ 1008 0xffffff, /* dst_mask */ 1009 FALSE), /* pcrel_offset */ 1010 1011 /* An PC Relative 24-bit relocation used when setting PIC offset 1012 table register. */ 1013 HOWTO (R_M32R_GOTPC24, /* type */ 1014 0, /* rightshift */ 1015 2, /* size (0 = byte, 1 = short, 2 = long) */ 1016 24, /* bitsize */ 1017 TRUE, /* pc_relative */ 1018 0, /* bitpos */ 1019 complain_overflow_unsigned, /* complain_on_overflow */ 1020 bfd_elf_generic_reloc, /* special_function */ 1021 "R_M32R_GOTPC24", /* name */ 1022 FALSE, /* partial_inplace */ 1023 0xffffff, /* src_mask */ 1024 0xffffff, /* dst_mask */ 1025 TRUE), /* pcrel_offset */ 1026 1027 /* Like R_M32R_HI16_ULO, but referring to the GOT table entry for 1028 the symbol. */ 1029 HOWTO (R_M32R_GOT16_HI_ULO, /* type */ 1030 16, /* rightshift */ 1031 2, /* size (0 = byte, 1 = short, 2 = long) */ 1032 16, /* bitsize */ 1033 FALSE, /* pc_relative */ 1034 0, /* bitpos */ 1035 complain_overflow_dont, /* complain_on_overflow */ 1036 bfd_elf_generic_reloc, /* special_function */ 1037 "R_M32R_GOT16_HI_ULO", /* name */ 1038 FALSE, /* partial_inplace */ 1039 0x0000ffff, /* src_mask */ 1040 0x0000ffff, /* dst_mask */ 1041 FALSE), /* pcrel_offset */ 1042 1043 /* Like R_M32R_HI16_SLO, but referring to the GOT table entry for 1044 the symbol. */ 1045 HOWTO (R_M32R_GOT16_HI_SLO, /* type */ 1046 16, /* rightshift */ 1047 2, /* size (0 = byte, 1 = short, 2 = long) */ 1048 16, /* bitsize */ 1049 FALSE, /* pc_relative */ 1050 0, /* bitpos */ 1051 complain_overflow_dont, /* complain_on_overflow */ 1052 bfd_elf_generic_reloc, /* special_function */ 1053 "R_M32R_GOT16_HI_SLO", /* name */ 1054 FALSE, /* partial_inplace */ 1055 0x0000ffff, /* src_mask */ 1056 0x0000ffff, /* dst_mask */ 1057 FALSE), /* pcrel_offset */ 1058 1059 /* Like R_M32R_LO16, but referring to the GOT table entry for 1060 the symbol. */ 1061 HOWTO (R_M32R_GOT16_LO, /* type */ 1062 0, /* rightshift */ 1063 2, /* size (0 = byte, 1 = short, 2 = long) */ 1064 16, /* bitsize */ 1065 FALSE, /* pc_relative */ 1066 0, /* bitpos */ 1067 complain_overflow_dont, /* complain_on_overflow */ 1068 bfd_elf_generic_reloc, /* special_function */ 1069 "R_M32R_GOT16_LO", /* name */ 1070 FALSE, /* partial_inplace */ 1071 0x0000ffff, /* src_mask */ 1072 0x0000ffff, /* dst_mask */ 1073 FALSE), /* pcrel_offset */ 1074 1075 /* An PC Relative relocation used when setting PIC offset table register. 1076 Like R_M32R_HI16_ULO, but referring to the GOT table entry for 1077 the symbol. */ 1078 HOWTO (R_M32R_GOTPC_HI_ULO, /* type */ 1079 16, /* rightshift */ 1080 2, /* size (0 = byte, 1 = short, 2 = long) */ 1081 16, /* bitsize */ 1082 FALSE, /* pc_relative */ 1083 0, /* bitpos */ 1084 complain_overflow_dont, /* complain_on_overflow */ 1085 bfd_elf_generic_reloc, /* special_function */ 1086 "R_M32R_GOTPC_HI_ULO", /* name */ 1087 FALSE, /* partial_inplace */ 1088 0x0000ffff, /* src_mask */ 1089 0x0000ffff, /* dst_mask */ 1090 TRUE), /* pcrel_offset */ 1091 1092 /* An PC Relative relocation used when setting PIC offset table register. 1093 Like R_M32R_HI16_SLO, but referring to the GOT table entry for 1094 the symbol. */ 1095 HOWTO (R_M32R_GOTPC_HI_SLO, /* type */ 1096 16, /* rightshift */ 1097 2, /* size (0 = byte, 1 = short, 2 = long) */ 1098 16, /* bitsize */ 1099 FALSE, /* pc_relative */ 1100 0, /* bitpos */ 1101 complain_overflow_dont, /* complain_on_overflow */ 1102 bfd_elf_generic_reloc, /* special_function */ 1103 "R_M32R_GOTPC_HI_SLO", /* name */ 1104 FALSE, /* partial_inplace */ 1105 0x0000ffff, /* src_mask */ 1106 0x0000ffff, /* dst_mask */ 1107 TRUE), /* pcrel_offset */ 1108 1109 /* An PC Relative relocation used when setting PIC offset table register. 1110 Like R_M32R_LO16, but referring to the GOT table entry for 1111 the symbol. */ 1112 HOWTO (R_M32R_GOTPC_LO, /* type */ 1113 0, /* rightshift */ 1114 2, /* size (0 = byte, 1 = short, 2 = long) */ 1115 16, /* bitsize */ 1116 FALSE, /* pc_relative */ 1117 0, /* bitpos */ 1118 complain_overflow_dont, /* complain_on_overflow */ 1119 bfd_elf_generic_reloc, /* special_function */ 1120 "R_M32R_GOTPC_LO", /* name */ 1121 FALSE, /* partial_inplace */ 1122 0x0000ffff, /* src_mask */ 1123 0x0000ffff, /* dst_mask */ 1124 TRUE), /* pcrel_offset */ 1125 1126 HOWTO (R_M32R_GOTOFF_HI_ULO, /* type */ 1127 16, /* rightshift */ 1128 2, /* size (0 = byte, 1 = short, 2 = long) */ 1129 16, /* bitsize */ 1130 FALSE, /* pc_relative */ 1131 0, /* bitpos */ 1132 complain_overflow_dont, /* complain_on_overflow */ 1133 bfd_elf_generic_reloc, /* special_function */ 1134 "R_M32R_GOTOFF_HI_ULO",/* name */ 1135 FALSE, /* partial_inplace */ 1136 0x0000ffff, /* src_mask */ 1137 0x0000ffff, /* dst_mask */ 1138 FALSE), /* pcrel_offset */ 1139 1140 HOWTO (R_M32R_GOTOFF_HI_SLO, /* type */ 1141 16, /* rightshift */ 1142 2, /* size (0 = byte, 1 = short, 2 = long) */ 1143 16, /* bitsize */ 1144 FALSE, /* pc_relative */ 1145 0, /* bitpos */ 1146 complain_overflow_dont, /* complain_on_overflow */ 1147 bfd_elf_generic_reloc, /* special_function */ 1148 "R_M32R_GOTOFF_HI_SLO",/* name */ 1149 FALSE, /* partial_inplace */ 1150 0x0000ffff, /* src_mask */ 1151 0x0000ffff, /* dst_mask */ 1152 FALSE), /* pcrel_offset */ 1153 1154 HOWTO (R_M32R_GOTOFF_LO, /* type */ 1155 0, /* rightshift */ 1156 2, /* size (0 = byte, 1 = short, 2 = long) */ 1157 16, /* bitsize */ 1158 FALSE, /* pc_relative */ 1159 0, /* bitpos */ 1160 complain_overflow_dont, /* complain_on_overflow */ 1161 bfd_elf_generic_reloc, /* special_function */ 1162 "R_M32R_GOTOFF_LO", /* name */ 1163 FALSE, /* partial_inplace */ 1164 0x0000ffff, /* src_mask */ 1165 0x0000ffff, /* dst_mask */ 1166 FALSE), /* pcrel_offset */ 1167 }; 1168 1169 /* Map BFD reloc types to M32R ELF reloc types. */ 1170 1171 struct m32r_reloc_map 1172 { 1173 bfd_reloc_code_real_type bfd_reloc_val; 1174 unsigned char elf_reloc_val; 1175 }; 1176 1177 #ifdef USE_M32R_OLD_RELOC 1178 static const struct m32r_reloc_map m32r_reloc_map_old[] = 1179 { 1180 { BFD_RELOC_NONE, R_M32R_NONE }, 1181 { BFD_RELOC_16, R_M32R_16 }, 1182 { BFD_RELOC_32, R_M32R_32 }, 1183 { BFD_RELOC_M32R_24, R_M32R_24 }, 1184 { BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL }, 1185 { BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL }, 1186 { BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL }, 1187 { BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO }, 1188 { BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO }, 1189 { BFD_RELOC_M32R_LO16, R_M32R_LO16 }, 1190 { BFD_RELOC_M32R_SDA16, R_M32R_SDA16 }, 1191 { BFD_RELOC_VTABLE_INHERIT, R_M32R_GNU_VTINHERIT }, 1192 { BFD_RELOC_VTABLE_ENTRY, R_M32R_GNU_VTENTRY }, 1193 }; 1194 #else 1195 static const struct m32r_reloc_map m32r_reloc_map[] = 1196 { 1197 { BFD_RELOC_NONE, R_M32R_NONE }, 1198 { BFD_RELOC_16, R_M32R_16_RELA }, 1199 { BFD_RELOC_32, R_M32R_32_RELA }, 1200 { BFD_RELOC_M32R_24, R_M32R_24_RELA }, 1201 { BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL_RELA }, 1202 { BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL_RELA }, 1203 { BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL_RELA }, 1204 { BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO_RELA }, 1205 { BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO_RELA }, 1206 { BFD_RELOC_M32R_LO16, R_M32R_LO16_RELA }, 1207 { BFD_RELOC_M32R_SDA16, R_M32R_SDA16_RELA }, 1208 { BFD_RELOC_VTABLE_INHERIT, R_M32R_RELA_GNU_VTINHERIT }, 1209 { BFD_RELOC_VTABLE_ENTRY, R_M32R_RELA_GNU_VTENTRY }, 1210 { BFD_RELOC_32_PCREL, R_M32R_REL32 }, 1211 1212 { BFD_RELOC_M32R_GOT24, R_M32R_GOT24 }, 1213 { BFD_RELOC_M32R_26_PLTREL, R_M32R_26_PLTREL }, 1214 { BFD_RELOC_M32R_COPY, R_M32R_COPY }, 1215 { BFD_RELOC_M32R_GLOB_DAT, R_M32R_GLOB_DAT }, 1216 { BFD_RELOC_M32R_JMP_SLOT, R_M32R_JMP_SLOT }, 1217 { BFD_RELOC_M32R_RELATIVE, R_M32R_RELATIVE }, 1218 { BFD_RELOC_M32R_GOTOFF, R_M32R_GOTOFF }, 1219 { BFD_RELOC_M32R_GOTPC24, R_M32R_GOTPC24 }, 1220 { BFD_RELOC_M32R_GOT16_HI_ULO, R_M32R_GOT16_HI_ULO }, 1221 { BFD_RELOC_M32R_GOT16_HI_SLO, R_M32R_GOT16_HI_SLO }, 1222 { BFD_RELOC_M32R_GOT16_LO, R_M32R_GOT16_LO }, 1223 { BFD_RELOC_M32R_GOTPC_HI_ULO, R_M32R_GOTPC_HI_ULO }, 1224 { BFD_RELOC_M32R_GOTPC_HI_SLO, R_M32R_GOTPC_HI_SLO }, 1225 { BFD_RELOC_M32R_GOTPC_LO, R_M32R_GOTPC_LO }, 1226 { BFD_RELOC_M32R_GOTOFF_HI_ULO, R_M32R_GOTOFF_HI_ULO }, 1227 { BFD_RELOC_M32R_GOTOFF_HI_SLO, R_M32R_GOTOFF_HI_SLO }, 1228 { BFD_RELOC_M32R_GOTOFF_LO, R_M32R_GOTOFF_LO }, 1229 }; 1230 #endif 1231 1232 static reloc_howto_type * 1233 bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1234 bfd_reloc_code_real_type code) 1235 { 1236 unsigned int i; 1237 1238 #ifdef USE_M32R_OLD_RELOC 1239 for (i = 0; 1240 i < sizeof (m32r_reloc_map_old) / sizeof (struct m32r_reloc_map); 1241 i++) 1242 if (m32r_reloc_map_old[i].bfd_reloc_val == code) 1243 return &m32r_elf_howto_table[m32r_reloc_map_old[i].elf_reloc_val]; 1244 1245 #else /* ! USE_M32R_OLD_RELOC */ 1246 1247 for (i = 0; 1248 i < sizeof (m32r_reloc_map) / sizeof (struct m32r_reloc_map); 1249 i++) 1250 if (m32r_reloc_map[i].bfd_reloc_val == code) 1251 return &m32r_elf_howto_table[m32r_reloc_map[i].elf_reloc_val]; 1252 #endif 1253 1254 return NULL; 1255 } 1256 1257 static reloc_howto_type * 1258 bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1259 const char *r_name) 1260 { 1261 unsigned int i; 1262 1263 for (i = 0; 1264 i < sizeof (m32r_elf_howto_table) / sizeof (m32r_elf_howto_table[0]); 1265 i++) 1266 if (m32r_elf_howto_table[i].name != NULL 1267 && strcasecmp (m32r_elf_howto_table[i].name, r_name) == 0) 1268 return &m32r_elf_howto_table[i]; 1269 1270 return NULL; 1271 } 1272 1273 /* Set the howto pointer for an M32R ELF reloc. */ 1274 1275 static void 1276 m32r_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, 1277 arelent *cache_ptr, 1278 Elf_Internal_Rela *dst) 1279 { 1280 unsigned int r_type; 1281 1282 r_type = ELF32_R_TYPE (dst->r_info); 1283 if (r_type > (unsigned int) R_M32R_GNU_VTENTRY) 1284 { 1285 _bfd_error_handler (_("%B: invalid M32R reloc number: %d"), abfd, r_type); 1286 r_type = 0; 1287 } 1288 cache_ptr->howto = &m32r_elf_howto_table[r_type]; 1289 } 1290 1291 static void 1292 m32r_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 1293 arelent *cache_ptr, 1294 Elf_Internal_Rela *dst) 1295 { 1296 BFD_ASSERT ((ELF32_R_TYPE(dst->r_info) == (unsigned int) R_M32R_NONE) 1297 || ((ELF32_R_TYPE(dst->r_info) > (unsigned int) R_M32R_GNU_VTENTRY) 1298 && (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_M32R_max))); 1299 cache_ptr->howto = &m32r_elf_howto_table[ELF32_R_TYPE(dst->r_info)]; 1300 } 1301 1302 1303 /* Given a BFD section, try to locate the corresponding ELF section 1304 index. */ 1305 1306 static bfd_boolean 1307 _bfd_m32r_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, 1308 asection *sec, 1309 int *retval) 1310 { 1311 if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0) 1312 { 1313 *retval = SHN_M32R_SCOMMON; 1314 return TRUE; 1315 } 1316 return FALSE; 1317 } 1318 1319 /* M32R ELF uses two common sections. One is the usual one, and the other 1320 is for small objects. All the small objects are kept together, and then 1321 referenced via one register, which yields faster assembler code. It is 1322 up to the compiler to emit an instruction to load the register with 1323 _SDA_BASE. This is what we use for the small common section. This 1324 approach is copied from elf32-mips.c. */ 1325 static asection m32r_elf_scom_section; 1326 static asymbol m32r_elf_scom_symbol; 1327 static asymbol *m32r_elf_scom_symbol_ptr; 1328 1329 /* Handle the special M32R section numbers that a symbol may use. */ 1330 1331 static void 1332 _bfd_m32r_elf_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *asym) 1333 { 1334 elf_symbol_type *elfsym = (elf_symbol_type *) asym; 1335 1336 switch (elfsym->internal_elf_sym.st_shndx) 1337 { 1338 case SHN_M32R_SCOMMON: 1339 if (m32r_elf_scom_section.name == NULL) 1340 { 1341 /* Initialize the small common section. */ 1342 m32r_elf_scom_section.name = ".scommon"; 1343 m32r_elf_scom_section.flags = SEC_IS_COMMON; 1344 m32r_elf_scom_section.output_section = &m32r_elf_scom_section; 1345 m32r_elf_scom_section.symbol = &m32r_elf_scom_symbol; 1346 m32r_elf_scom_section.symbol_ptr_ptr = &m32r_elf_scom_symbol_ptr; 1347 m32r_elf_scom_symbol.name = ".scommon"; 1348 m32r_elf_scom_symbol.flags = BSF_SECTION_SYM; 1349 m32r_elf_scom_symbol.section = &m32r_elf_scom_section; 1350 m32r_elf_scom_symbol_ptr = &m32r_elf_scom_symbol; 1351 } 1352 asym->section = &m32r_elf_scom_section; 1353 asym->value = elfsym->internal_elf_sym.st_size; 1354 break; 1355 } 1356 } 1357 1358 /* Hook called by the linker routine which adds symbols from an object 1359 file. We must handle the special M32R section numbers here. 1360 We also keep watching for whether we need to create the sdata special 1361 linker sections. */ 1362 1363 static bfd_boolean 1364 m32r_elf_add_symbol_hook (bfd *abfd, 1365 struct bfd_link_info *info, 1366 Elf_Internal_Sym *sym, 1367 const char **namep, 1368 flagword *flagsp ATTRIBUTE_UNUSED, 1369 asection **secp, 1370 bfd_vma *valp) 1371 { 1372 if (! bfd_link_relocatable (info) 1373 && (*namep)[0] == '_' && (*namep)[1] == 'S' 1374 && strcmp (*namep, "_SDA_BASE_") == 0 1375 && is_elf_hash_table (info->hash)) 1376 { 1377 /* This is simpler than using _bfd_elf_create_linker_section 1378 (our needs are simpler than ppc's needs). Also 1379 _bfd_elf_create_linker_section currently has a bug where if a .sdata 1380 section already exists a new one is created that follows it which 1381 screws of _SDA_BASE_ address calcs because output_offset != 0. */ 1382 struct elf_link_hash_entry *h; 1383 struct bfd_link_hash_entry *bh; 1384 asection *s = bfd_get_section_by_name (abfd, ".sdata"); 1385 1386 /* The following code was cobbled from elf32-ppc.c and elflink.c. */ 1387 if (s == NULL) 1388 { 1389 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 1390 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 1391 1392 s = bfd_make_section_anyway_with_flags (abfd, ".sdata", 1393 flags); 1394 if (s == NULL) 1395 return FALSE; 1396 if (! bfd_set_section_alignment (abfd, s, 2)) 1397 return FALSE; 1398 } 1399 1400 bh = bfd_link_hash_lookup (info->hash, "_SDA_BASE_", 1401 FALSE, FALSE, FALSE); 1402 1403 if ((bh == NULL || bh->type == bfd_link_hash_undefined) 1404 && !(_bfd_generic_link_add_one_symbol (info, 1405 abfd, 1406 "_SDA_BASE_", 1407 BSF_GLOBAL, 1408 s, 1409 (bfd_vma) 32768, 1410 NULL, 1411 FALSE, 1412 get_elf_backend_data (abfd)->collect, 1413 &bh))) 1414 return FALSE; 1415 h = (struct elf_link_hash_entry *) bh; 1416 h->type = STT_OBJECT; 1417 } 1418 1419 switch (sym->st_shndx) 1420 { 1421 case SHN_M32R_SCOMMON: 1422 *secp = bfd_make_section_old_way (abfd, ".scommon"); 1423 (*secp)->flags |= SEC_IS_COMMON; 1424 *valp = sym->st_size; 1425 break; 1426 } 1427 1428 return TRUE; 1429 } 1430 1431 /* We have to figure out the SDA_BASE value, so that we can adjust the 1432 symbol value correctly. We look up the symbol _SDA_BASE_ in the output 1433 BFD. If we can't find it, we're stuck. We cache it in the ELF 1434 target data. We don't need to adjust the symbol value for an 1435 external symbol if we are producing relocatable output. */ 1436 1437 static bfd_reloc_status_type 1438 m32r_elf_final_sda_base (bfd *output_bfd, 1439 struct bfd_link_info *info, 1440 const char **error_message, 1441 bfd_vma *psb) 1442 { 1443 if (elf_gp (output_bfd) == 0) 1444 { 1445 struct bfd_link_hash_entry *h; 1446 1447 h = bfd_link_hash_lookup (info->hash, "_SDA_BASE_", FALSE, FALSE, TRUE); 1448 if (h != NULL && h->type == bfd_link_hash_defined) 1449 elf_gp (output_bfd) = (h->u.def.value 1450 + h->u.def.section->output_section->vma 1451 + h->u.def.section->output_offset); 1452 else 1453 { 1454 /* Only get the error once. */ 1455 *psb = elf_gp (output_bfd) = 4; 1456 *error_message = 1457 (const char *) _("SDA relocation when _SDA_BASE_ not defined"); 1458 return bfd_reloc_dangerous; 1459 } 1460 } 1461 *psb = elf_gp (output_bfd); 1462 return bfd_reloc_ok; 1463 } 1464 1465 /* Return size of a PLT entry. */ 1466 #define elf_m32r_sizeof_plt(info) PLT_ENTRY_SIZE 1467 1468 /* The m32r linker needs to keep track of the number of relocs that it 1469 decides to copy in check_relocs for each symbol. This is so that 1470 it can discard PC relative relocs if it doesn't need them when 1471 linking with -Bsymbolic. We store the information in a field 1472 extending the regular ELF linker hash table. */ 1473 1474 /* This structure keeps track of the number of PC relative relocs we 1475 have copied for a given symbol. */ 1476 1477 struct elf_m32r_pcrel_relocs_copied 1478 { 1479 /* Next section. */ 1480 struct elf_m32r_pcrel_relocs_copied *next; 1481 /* A section in dynobj. */ 1482 asection *section; 1483 /* Number of relocs copied in this section. */ 1484 bfd_size_type count; 1485 }; 1486 1487 /* The sh linker needs to keep track of the number of relocs that it 1488 decides to copy as dynamic relocs in check_relocs for each symbol. 1489 This is so that it can later discard them if they are found to be 1490 unnecessary. We store the information in a field extending the 1491 regular ELF linker hash table. */ 1492 1493 struct elf_m32r_dyn_relocs 1494 { 1495 struct elf_m32r_dyn_relocs *next; 1496 1497 /* The input section of the reloc. */ 1498 asection *sec; 1499 1500 /* Total number of relocs copied for the input section. */ 1501 bfd_size_type count; 1502 1503 /* Number of pc-relative relocs copied for the input section. */ 1504 bfd_size_type pc_count; 1505 }; 1506 1507 1508 /* m32r ELF linker hash entry. */ 1509 1510 struct elf_m32r_link_hash_entry 1511 { 1512 struct elf_link_hash_entry root; 1513 1514 /* Track dynamic relocs copied for this symbol. */ 1515 struct elf_m32r_dyn_relocs *dyn_relocs; 1516 }; 1517 1518 /* m32r ELF linker hash table. */ 1519 1520 struct elf_m32r_link_hash_table 1521 { 1522 struct elf_link_hash_table root; 1523 1524 /* Short-cuts to get to dynamic linker sections. */ 1525 asection *sgot; 1526 asection *sgotplt; 1527 asection *srelgot; 1528 asection *splt; 1529 asection *srelplt; 1530 asection *sdynbss; 1531 asection *srelbss; 1532 1533 /* Small local sym cache. */ 1534 struct sym_cache sym_cache; 1535 }; 1536 1537 /* Traverse an m32r ELF linker hash table. */ 1538 1539 #define m32r_elf_link_hash_traverse(table, func, info) \ 1540 (elf_link_hash_traverse \ 1541 (&(table)->root, \ 1542 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ 1543 (info))) 1544 1545 /* Get the m32r ELF linker hash table from a link_info structure. */ 1546 1547 #define m32r_elf_hash_table(p) \ 1548 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 1549 == M32R_ELF_DATA ? ((struct elf_m32r_link_hash_table *) ((p)->hash)) : NULL) 1550 1551 /* Create an entry in an m32r ELF linker hash table. */ 1552 1553 static struct bfd_hash_entry * 1554 m32r_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 1555 struct bfd_hash_table *table, 1556 const char *string) 1557 { 1558 struct elf_m32r_link_hash_entry *ret = 1559 (struct elf_m32r_link_hash_entry *) entry; 1560 1561 /* Allocate the structure if it has not already been allocated by a 1562 subclass. */ 1563 if (ret == NULL) 1564 ret = bfd_hash_allocate (table, 1565 sizeof (struct elf_m32r_link_hash_entry)); 1566 if (ret == NULL) 1567 return NULL; 1568 1569 /* Call the allocation method of the superclass. */ 1570 ret = ((struct elf_m32r_link_hash_entry *) 1571 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 1572 table, string)); 1573 if (ret != NULL) 1574 { 1575 struct elf_m32r_link_hash_entry *eh; 1576 1577 eh = (struct elf_m32r_link_hash_entry *) ret; 1578 eh->dyn_relocs = NULL; 1579 } 1580 1581 return (struct bfd_hash_entry *) ret; 1582 } 1583 1584 /* Create an m32r ELF linker hash table. */ 1585 1586 static struct bfd_link_hash_table * 1587 m32r_elf_link_hash_table_create (bfd *abfd) 1588 { 1589 struct elf_m32r_link_hash_table *ret; 1590 bfd_size_type amt = sizeof (struct elf_m32r_link_hash_table); 1591 1592 ret = bfd_zmalloc (amt); 1593 if (ret == NULL) 1594 return NULL; 1595 1596 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, 1597 m32r_elf_link_hash_newfunc, 1598 sizeof (struct elf_m32r_link_hash_entry), 1599 M32R_ELF_DATA)) 1600 { 1601 free (ret); 1602 return NULL; 1603 } 1604 1605 return &ret->root.root; 1606 } 1607 1608 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up 1609 shortcuts to them in our hash table. */ 1610 1611 static bfd_boolean 1612 create_got_section (bfd *dynobj, struct bfd_link_info *info) 1613 { 1614 struct elf_m32r_link_hash_table *htab; 1615 1616 if (! _bfd_elf_create_got_section (dynobj, info)) 1617 return FALSE; 1618 1619 htab = m32r_elf_hash_table (info); 1620 if (htab == NULL) 1621 return FALSE; 1622 1623 htab->sgot = bfd_get_linker_section (dynobj, ".got"); 1624 htab->sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); 1625 htab->srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 1626 if (! htab->sgot || ! htab->sgotplt || ! htab->srelgot) 1627 abort (); 1628 1629 return TRUE; 1630 } 1631 1632 /* Create dynamic sections when linking against a dynamic object. */ 1633 1634 static bfd_boolean 1635 m32r_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 1636 { 1637 struct elf_m32r_link_hash_table *htab; 1638 flagword flags, pltflags; 1639 asection *s; 1640 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 1641 int ptralign = 2; /* 32bit */ 1642 1643 htab = m32r_elf_hash_table (info); 1644 if (htab == NULL) 1645 return FALSE; 1646 1647 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and 1648 .rel[a].bss sections. */ 1649 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 1650 | SEC_LINKER_CREATED); 1651 1652 pltflags = flags; 1653 pltflags |= SEC_CODE; 1654 if (bed->plt_not_loaded) 1655 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); 1656 if (bed->plt_readonly) 1657 pltflags |= SEC_READONLY; 1658 1659 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); 1660 htab->splt = s; 1661 if (s == NULL 1662 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) 1663 return FALSE; 1664 1665 if (bed->want_plt_sym) 1666 { 1667 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the 1668 .plt section. */ 1669 struct bfd_link_hash_entry *bh = NULL; 1670 struct elf_link_hash_entry *h; 1671 1672 if (! (_bfd_generic_link_add_one_symbol 1673 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 1674 (bfd_vma) 0, NULL, FALSE, 1675 get_elf_backend_data (abfd)->collect, &bh))) 1676 return FALSE; 1677 h = (struct elf_link_hash_entry *) bh; 1678 h->def_regular = 1; 1679 h->type = STT_OBJECT; 1680 htab->root.hplt = h; 1681 1682 if (bfd_link_pic (info) 1683 && ! bfd_elf_link_record_dynamic_symbol (info, h)) 1684 return FALSE; 1685 } 1686 1687 s = bfd_make_section_anyway_with_flags (abfd, 1688 bed->default_use_rela_p 1689 ? ".rela.plt" : ".rel.plt", 1690 flags | SEC_READONLY); 1691 htab->srelplt = s; 1692 if (s == NULL 1693 || ! bfd_set_section_alignment (abfd, s, ptralign)) 1694 return FALSE; 1695 1696 if (htab->sgot == NULL 1697 && ! create_got_section (abfd, info)) 1698 return FALSE; 1699 1700 if (bed->want_dynbss) 1701 { 1702 /* The .dynbss section is a place to put symbols which are defined 1703 by dynamic objects, are referenced by regular objects, and are 1704 not functions. We must allocate space for them in the process 1705 image and use a R_*_COPY reloc to tell the dynamic linker to 1706 initialize them at run time. The linker script puts the .dynbss 1707 section into the .bss section of the final image. */ 1708 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", 1709 SEC_ALLOC | SEC_LINKER_CREATED); 1710 htab->sdynbss = s; 1711 if (s == NULL) 1712 return FALSE; 1713 /* The .rel[a].bss section holds copy relocs. This section is not 1714 normally needed. We need to create it here, though, so that the 1715 linker will map it to an output section. We can't just create it 1716 only if we need it, because we will not know whether we need it 1717 until we have seen all the input files, and the first time the 1718 main linker code calls BFD after examining all the input files 1719 (size_dynamic_sections) the input sections have already been 1720 mapped to the output sections. If the section turns out not to 1721 be needed, we can discard it later. We will never need this 1722 section when generating a shared object, since they do not use 1723 copy relocs. */ 1724 if (! bfd_link_pic (info)) 1725 { 1726 s = bfd_make_section_anyway_with_flags (abfd, 1727 (bed->default_use_rela_p 1728 ? ".rela.bss" : ".rel.bss"), 1729 flags | SEC_READONLY); 1730 htab->srelbss = s; 1731 if (s == NULL 1732 || ! bfd_set_section_alignment (abfd, s, ptralign)) 1733 return FALSE; 1734 } 1735 } 1736 1737 return TRUE; 1738 } 1739 1740 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 1741 1742 static void 1743 m32r_elf_copy_indirect_symbol (struct bfd_link_info *info, 1744 struct elf_link_hash_entry *dir, 1745 struct elf_link_hash_entry *ind) 1746 { 1747 struct elf_m32r_link_hash_entry * edir; 1748 struct elf_m32r_link_hash_entry * eind; 1749 1750 edir = (struct elf_m32r_link_hash_entry *) dir; 1751 eind = (struct elf_m32r_link_hash_entry *) ind; 1752 1753 if (eind->dyn_relocs != NULL) 1754 { 1755 if (edir->dyn_relocs != NULL) 1756 { 1757 struct elf_m32r_dyn_relocs **pp; 1758 struct elf_m32r_dyn_relocs *p; 1759 1760 /* Add reloc counts against the indirect sym to the direct sym 1761 list. Merge any entries against the same section. */ 1762 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) 1763 { 1764 struct elf_m32r_dyn_relocs *q; 1765 1766 for (q = edir->dyn_relocs; q != NULL; q = q->next) 1767 if (q->sec == p->sec) 1768 { 1769 q->pc_count += p->pc_count; 1770 q->count += p->count; 1771 *pp = p->next; 1772 break; 1773 } 1774 if (q == NULL) 1775 pp = &p->next; 1776 } 1777 *pp = edir->dyn_relocs; 1778 } 1779 1780 edir->dyn_relocs = eind->dyn_relocs; 1781 eind->dyn_relocs = NULL; 1782 } 1783 1784 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 1785 } 1786 1787 1788 /* Adjust a symbol defined by a dynamic object and referenced by a 1789 regular object. The current definition is in some section of the 1790 dynamic object, but we're not including those sections. We have to 1791 change the definition to something the rest of the link can 1792 understand. */ 1793 1794 static bfd_boolean 1795 m32r_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 1796 struct elf_link_hash_entry *h) 1797 { 1798 struct elf_m32r_link_hash_table *htab; 1799 struct elf_m32r_link_hash_entry *eh; 1800 struct elf_m32r_dyn_relocs *p; 1801 bfd *dynobj; 1802 asection *s; 1803 1804 #ifdef DEBUG_PIC 1805 printf ("m32r_elf_adjust_dynamic_symbol()\n"); 1806 #endif 1807 1808 dynobj = elf_hash_table (info)->dynobj; 1809 1810 /* Make sure we know what is going on here. */ 1811 BFD_ASSERT (dynobj != NULL 1812 && (h->needs_plt 1813 || h->u.weakdef != NULL 1814 || (h->def_dynamic 1815 && h->ref_regular 1816 && !h->def_regular))); 1817 1818 /* If this is a function, put it in the procedure linkage table. We 1819 will fill in the contents of the procedure linkage table later, 1820 when we know the address of the .got section. */ 1821 if (h->type == STT_FUNC 1822 || h->needs_plt) 1823 { 1824 if (! bfd_link_pic (info) 1825 && !h->def_dynamic 1826 && !h->ref_dynamic 1827 && h->root.type != bfd_link_hash_undefweak 1828 && h->root.type != bfd_link_hash_undefined) 1829 { 1830 /* This case can occur if we saw a PLT reloc in an input 1831 file, but the symbol was never referred to by a dynamic 1832 object. In such a case, we don't actually need to build 1833 a procedure linkage table, and we can just do a PCREL 1834 reloc instead. */ 1835 h->plt.offset = (bfd_vma) -1; 1836 h->needs_plt = 0; 1837 } 1838 1839 return TRUE; 1840 } 1841 else 1842 h->plt.offset = (bfd_vma) -1; 1843 1844 /* If this is a weak symbol, and there is a real definition, the 1845 processor independent code will have arranged for us to see the 1846 real definition first, and we can just use the same value. */ 1847 if (h->u.weakdef != NULL) 1848 { 1849 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 1850 || h->u.weakdef->root.type == bfd_link_hash_defweak); 1851 h->root.u.def.section = h->u.weakdef->root.u.def.section; 1852 h->root.u.def.value = h->u.weakdef->root.u.def.value; 1853 return TRUE; 1854 } 1855 1856 /* This is a reference to a symbol defined by a dynamic object which 1857 is not a function. */ 1858 1859 /* If we are creating a shared library, we must presume that the 1860 only references to the symbol are via the global offset table. 1861 For such cases we need not do anything here; the relocations will 1862 be handled correctly by relocate_section. */ 1863 if (bfd_link_pic (info)) 1864 return TRUE; 1865 1866 /* If there are no references to this symbol that do not use the 1867 GOT, we don't need to generate a copy reloc. */ 1868 if (!h->non_got_ref) 1869 return TRUE; 1870 1871 /* If -z nocopyreloc was given, we won't generate them either. */ 1872 if (info->nocopyreloc) 1873 { 1874 h->non_got_ref = 0; 1875 return TRUE; 1876 } 1877 1878 eh = (struct elf_m32r_link_hash_entry *) h; 1879 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1880 { 1881 s = p->sec->output_section; 1882 if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0) 1883 break; 1884 } 1885 1886 /* If we didn't find any dynamic relocs in sections which needs the 1887 copy reloc, then we'll be keeping the dynamic relocs and avoiding 1888 the copy reloc. */ 1889 if (p == NULL) 1890 { 1891 h->non_got_ref = 0; 1892 return TRUE; 1893 } 1894 1895 /* We must allocate the symbol in our .dynbss section, which will 1896 become part of the .bss section of the executable. There will be 1897 an entry for this symbol in the .dynsym section. The dynamic 1898 object will contain position independent code, so all references 1899 from the dynamic object to this symbol will go through the global 1900 offset table. The dynamic linker will use the .dynsym entry to 1901 determine the address it must put in the global offset table, so 1902 both the dynamic object and the regular object will refer to the 1903 same memory location for the variable. */ 1904 1905 htab = m32r_elf_hash_table (info); 1906 if (htab == NULL) 1907 return FALSE; 1908 1909 s = htab->sdynbss; 1910 BFD_ASSERT (s != NULL); 1911 1912 /* We must generate a R_M32R_COPY reloc to tell the dynamic linker 1913 to copy the initial value out of the dynamic object and into the 1914 runtime process image. We need to remember the offset into the 1915 .rela.bss section we are going to use. */ 1916 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 1917 { 1918 asection *srel; 1919 1920 srel = htab->srelbss; 1921 BFD_ASSERT (srel != NULL); 1922 srel->size += sizeof (Elf32_External_Rela); 1923 h->needs_copy = 1; 1924 } 1925 1926 return _bfd_elf_adjust_dynamic_copy (info, h, s); 1927 } 1928 1929 /* Allocate space in .plt, .got and associated reloc sections for 1930 dynamic relocs. */ 1931 1932 static bfd_boolean 1933 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) 1934 { 1935 struct bfd_link_info *info; 1936 struct elf_m32r_link_hash_table *htab; 1937 struct elf_m32r_link_hash_entry *eh; 1938 struct elf_m32r_dyn_relocs *p; 1939 1940 if (h->root.type == bfd_link_hash_indirect) 1941 return TRUE; 1942 1943 info = (struct bfd_link_info *) inf; 1944 htab = m32r_elf_hash_table (info); 1945 if (htab == NULL) 1946 return FALSE; 1947 1948 eh = (struct elf_m32r_link_hash_entry *) h; 1949 1950 if (htab->root.dynamic_sections_created 1951 && h->plt.refcount > 0) 1952 { 1953 /* Make sure this symbol is output as a dynamic symbol. 1954 Undefined weak syms won't yet be marked as dynamic. */ 1955 if (h->dynindx == -1 1956 && !h->forced_local) 1957 { 1958 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1959 return FALSE; 1960 } 1961 1962 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) 1963 { 1964 asection *s = htab->splt; 1965 1966 /* If this is the first .plt entry, make room for the special 1967 first entry. */ 1968 if (s->size == 0) 1969 s->size += PLT_ENTRY_SIZE; 1970 1971 h->plt.offset = s->size; 1972 1973 /* If this symbol is not defined in a regular file, and we are 1974 not generating a shared library, then set the symbol to this 1975 location in the .plt. This is required to make function 1976 pointers compare as equal between the normal executable and 1977 the shared library. */ 1978 if (! bfd_link_pic (info) 1979 && !h->def_regular) 1980 { 1981 h->root.u.def.section = s; 1982 h->root.u.def.value = h->plt.offset; 1983 } 1984 1985 /* Make room for this entry. */ 1986 s->size += PLT_ENTRY_SIZE; 1987 1988 /* We also need to make an entry in the .got.plt section, which 1989 will be placed in the .got section by the linker script. */ 1990 htab->sgotplt->size += 4; 1991 1992 /* We also need to make an entry in the .rel.plt section. */ 1993 htab->srelplt->size += sizeof (Elf32_External_Rela); 1994 } 1995 else 1996 { 1997 h->plt.offset = (bfd_vma) -1; 1998 h->needs_plt = 0; 1999 } 2000 } 2001 else 2002 { 2003 h->plt.offset = (bfd_vma) -1; 2004 h->needs_plt = 0; 2005 } 2006 2007 if (h->got.refcount > 0) 2008 { 2009 asection *s; 2010 bfd_boolean dyn; 2011 2012 /* Make sure this symbol is output as a dynamic symbol. 2013 Undefined weak syms won't yet be marked as dynamic. */ 2014 if (h->dynindx == -1 2015 && !h->forced_local) 2016 { 2017 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2018 return FALSE; 2019 } 2020 2021 s = htab->sgot; 2022 2023 h->got.offset = s->size; 2024 s->size += 4; 2025 dyn = htab->root.dynamic_sections_created; 2026 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)) 2027 htab->srelgot->size += sizeof (Elf32_External_Rela); 2028 } 2029 else 2030 h->got.offset = (bfd_vma) -1; 2031 2032 if (eh->dyn_relocs == NULL) 2033 return TRUE; 2034 2035 /* In the shared -Bsymbolic case, discard space allocated for 2036 dynamic pc-relative relocs against symbols which turn out to be 2037 defined in regular objects. For the normal shared case, discard 2038 space for pc-relative relocs that have become local due to symbol 2039 visibility changes. */ 2040 2041 if (bfd_link_pic (info)) 2042 { 2043 if (h->def_regular 2044 && (h->forced_local 2045 || info->symbolic)) 2046 { 2047 struct elf_m32r_dyn_relocs **pp; 2048 2049 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;) 2050 { 2051 p->count -= p->pc_count; 2052 p->pc_count = 0; 2053 if (p->count == 0) 2054 *pp = p->next; 2055 else 2056 pp = &p->next; 2057 } 2058 } 2059 2060 /* Also discard relocs on undefined weak syms with non-default 2061 visibility. */ 2062 if (eh->dyn_relocs != NULL 2063 && h->root.type == bfd_link_hash_undefweak) 2064 { 2065 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 2066 eh->dyn_relocs = NULL; 2067 2068 /* Make sure undefined weak symbols are output as a dynamic 2069 symbol in PIEs. */ 2070 else if (h->dynindx == -1 2071 && !h->forced_local) 2072 { 2073 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2074 return FALSE; 2075 } 2076 } 2077 } 2078 else 2079 { 2080 /* For the non-shared case, discard space for relocs against 2081 symbols which turn out to need copy relocs or are not 2082 dynamic. */ 2083 2084 if (!h->non_got_ref 2085 && ((h->def_dynamic 2086 && !h->def_regular) 2087 || (htab->root.dynamic_sections_created 2088 && (h->root.type == bfd_link_hash_undefweak 2089 || h->root.type == bfd_link_hash_undefined)))) 2090 { 2091 /* Make sure this symbol is output as a dynamic symbol. 2092 Undefined weak syms won't yet be marked as dynamic. */ 2093 if (h->dynindx == -1 2094 && !h->forced_local) 2095 { 2096 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2097 return FALSE; 2098 } 2099 2100 /* If that succeeded, we know we'll be keeping all the 2101 relocs. */ 2102 if (h->dynindx != -1) 2103 goto keep; 2104 } 2105 2106 eh->dyn_relocs = NULL; 2107 2108 keep: ; 2109 } 2110 2111 /* Finally, allocate space. */ 2112 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2113 { 2114 asection *sreloc = elf_section_data (p->sec)->sreloc; 2115 sreloc->size += p->count * sizeof (Elf32_External_Rela); 2116 } 2117 2118 return TRUE; 2119 } 2120 2121 /* Find any dynamic relocs that apply to read-only sections. */ 2122 2123 static bfd_boolean 2124 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) 2125 { 2126 struct elf_m32r_link_hash_entry *eh; 2127 struct elf_m32r_dyn_relocs *p; 2128 2129 eh = (struct elf_m32r_link_hash_entry *) h; 2130 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2131 { 2132 asection *s = p->sec->output_section; 2133 2134 if (s != NULL && (s->flags & SEC_READONLY) != 0) 2135 { 2136 struct bfd_link_info *info = (struct bfd_link_info *) inf; 2137 2138 info->flags |= DF_TEXTREL; 2139 2140 /* Not an error, just cut short the traversal. */ 2141 return FALSE; 2142 } 2143 } 2144 return TRUE; 2145 } 2146 2147 /* Set the sizes of the dynamic sections. */ 2148 2149 static bfd_boolean 2150 m32r_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 2151 struct bfd_link_info *info) 2152 { 2153 struct elf_m32r_link_hash_table *htab; 2154 bfd *dynobj; 2155 asection *s; 2156 bfd_boolean relocs; 2157 bfd *ibfd; 2158 2159 #ifdef DEBUG_PIC 2160 printf ("m32r_elf_size_dynamic_sections()\n"); 2161 #endif 2162 2163 htab = m32r_elf_hash_table (info); 2164 if (htab == NULL) 2165 return FALSE; 2166 2167 dynobj = htab->root.dynobj; 2168 BFD_ASSERT (dynobj != NULL); 2169 2170 if (htab->root.dynamic_sections_created) 2171 { 2172 /* Set the contents of the .interp section to the interpreter. */ 2173 if (bfd_link_executable (info) && !info->nointerp) 2174 { 2175 s = bfd_get_linker_section (dynobj, ".interp"); 2176 BFD_ASSERT (s != NULL); 2177 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 2178 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 2179 } 2180 } 2181 2182 /* Set up .got offsets for local syms, and space for local dynamic 2183 relocs. */ 2184 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 2185 { 2186 bfd_signed_vma *local_got; 2187 bfd_signed_vma *end_local_got; 2188 bfd_size_type locsymcount; 2189 Elf_Internal_Shdr *symtab_hdr; 2190 asection *srel; 2191 2192 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 2193 continue; 2194 2195 for (s = ibfd->sections; s != NULL; s = s->next) 2196 { 2197 struct elf_m32r_dyn_relocs *p; 2198 2199 for (p = ((struct elf_m32r_dyn_relocs *) 2200 elf_section_data (s)->local_dynrel); 2201 p != NULL; 2202 p = p->next) 2203 { 2204 if (! bfd_is_abs_section (p->sec) 2205 && bfd_is_abs_section (p->sec->output_section)) 2206 { 2207 /* Input section has been discarded, either because 2208 it is a copy of a linkonce section or due to 2209 linker script /DISCARD/, so we'll be discarding 2210 the relocs too. */ 2211 } 2212 else if (p->count != 0) 2213 { 2214 srel = elf_section_data (p->sec)->sreloc; 2215 srel->size += p->count * sizeof (Elf32_External_Rela); 2216 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2217 info->flags |= DF_TEXTREL; 2218 } 2219 } 2220 } 2221 2222 local_got = elf_local_got_refcounts (ibfd); 2223 if (!local_got) 2224 continue; 2225 2226 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2227 locsymcount = symtab_hdr->sh_info; 2228 end_local_got = local_got + locsymcount; 2229 s = htab->sgot; 2230 srel = htab->srelgot; 2231 for (; local_got < end_local_got; ++local_got) 2232 { 2233 if (*local_got > 0) 2234 { 2235 *local_got = s->size; 2236 s->size += 4; 2237 if (bfd_link_pic (info)) 2238 srel->size += sizeof (Elf32_External_Rela); 2239 } 2240 else 2241 *local_got = (bfd_vma) -1; 2242 } 2243 } 2244 2245 /* Allocate global sym .plt and .got entries, and space for global 2246 sym dynamic relocs. */ 2247 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info); 2248 2249 /* We now have determined the sizes of the various dynamic sections. 2250 Allocate memory for them. */ 2251 relocs = FALSE; 2252 for (s = dynobj->sections; s != NULL; s = s->next) 2253 { 2254 if ((s->flags & SEC_LINKER_CREATED) == 0) 2255 continue; 2256 2257 if (s == htab->splt 2258 || s == htab->sgot 2259 || s == htab->sgotplt 2260 || s == htab->sdynbss) 2261 { 2262 /* Strip this section if we don't need it; see the 2263 comment below. */ 2264 } 2265 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) 2266 { 2267 if (s->size != 0 && s != htab->srelplt) 2268 relocs = TRUE; 2269 2270 /* We use the reloc_count field as a counter if we need 2271 to copy relocs into the output file. */ 2272 s->reloc_count = 0; 2273 } 2274 else 2275 /* It's not one of our sections, so don't allocate space. */ 2276 continue; 2277 2278 if (s->size == 0) 2279 { 2280 /* If we don't need this section, strip it from the 2281 output file. This is mostly to handle .rela.bss and 2282 .rela.plt. We must create both sections in 2283 create_dynamic_sections, because they must be created 2284 before the linker maps input sections to output 2285 sections. The linker does that before 2286 adjust_dynamic_symbol is called, and it is that 2287 function which decides whether anything needs to go 2288 into these sections. */ 2289 s->flags |= SEC_EXCLUDE; 2290 continue; 2291 } 2292 2293 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2294 continue; 2295 2296 /* Allocate memory for the section contents. We use bfd_zalloc 2297 here in case unused entries are not reclaimed before the 2298 section's contents are written out. This should not happen, 2299 but this way if it does, we get a R_M32R_NONE reloc instead 2300 of garbage. */ 2301 s->contents = bfd_zalloc (dynobj, s->size); 2302 if (s->contents == NULL) 2303 return FALSE; 2304 } 2305 2306 if (htab->root.dynamic_sections_created) 2307 { 2308 /* Add some entries to the .dynamic section. We fill in the 2309 values later, in m32r_elf_finish_dynamic_sections, but we 2310 must add the entries now so that we get the correct size for 2311 the .dynamic section. The DT_DEBUG entry is filled in by the 2312 dynamic linker and used by the debugger. */ 2313 #define add_dynamic_entry(TAG, VAL) \ 2314 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2315 2316 if (bfd_link_executable (info)) 2317 { 2318 if (! add_dynamic_entry (DT_DEBUG, 0)) 2319 return FALSE; 2320 } 2321 2322 if (htab->splt->size != 0) 2323 { 2324 if (! add_dynamic_entry (DT_PLTGOT, 0) 2325 || ! add_dynamic_entry (DT_PLTRELSZ, 0) 2326 || ! add_dynamic_entry (DT_PLTREL, DT_RELA) 2327 || ! add_dynamic_entry (DT_JMPREL, 0)) 2328 return FALSE; 2329 } 2330 2331 if (relocs) 2332 { 2333 if (! add_dynamic_entry (DT_RELA, 0) 2334 || ! add_dynamic_entry (DT_RELASZ, 0) 2335 || ! add_dynamic_entry (DT_RELAENT, 2336 sizeof (Elf32_External_Rela))) 2337 return FALSE; 2338 2339 /* If any dynamic relocs apply to a read-only section, 2340 then we need a DT_TEXTREL entry. */ 2341 if ((info->flags & DF_TEXTREL) == 0) 2342 elf_link_hash_traverse (&htab->root, readonly_dynrelocs, 2343 info); 2344 2345 if ((info->flags & DF_TEXTREL) != 0) 2346 { 2347 if (! add_dynamic_entry (DT_TEXTREL, 0)) 2348 return FALSE; 2349 } 2350 } 2351 } 2352 #undef add_dynamic_entry 2353 2354 return TRUE; 2355 } 2356 2357 /* Relocate an M32R/D ELF section. 2358 There is some attempt to make this function usable for many architectures, 2359 both for RELA and REL type relocs, if only to serve as a learning tool. 2360 2361 The RELOCATE_SECTION function is called by the new ELF backend linker 2362 to handle the relocations for a section. 2363 2364 The relocs are always passed as Rela structures; if the section 2365 actually uses Rel structures, the r_addend field will always be 2366 zero. 2367 2368 This function is responsible for adjust the section contents as 2369 necessary, and (if using Rela relocs and generating a 2370 relocatable output file) adjusting the reloc addend as 2371 necessary. 2372 2373 This function does not have to worry about setting the reloc 2374 address or the reloc symbol index. 2375 2376 LOCAL_SYMS is a pointer to the swapped in local symbols. 2377 2378 LOCAL_SECTIONS is an array giving the section in the input file 2379 corresponding to the st_shndx field of each local symbol. 2380 2381 The global hash table entry for the global symbols can be found 2382 via elf_sym_hashes (input_bfd). 2383 2384 When generating relocatable output, this function must handle 2385 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 2386 going to be the section symbol corresponding to the output 2387 section, which means that the addend must be adjusted 2388 accordingly. */ 2389 2390 static bfd_boolean 2391 m32r_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, 2392 struct bfd_link_info *info, 2393 bfd *input_bfd, 2394 asection *input_section, 2395 bfd_byte *contents, 2396 Elf_Internal_Rela *relocs, 2397 Elf_Internal_Sym *local_syms, 2398 asection **local_sections) 2399 { 2400 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 2401 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); 2402 Elf_Internal_Rela *rel, *relend; 2403 /* Assume success. */ 2404 bfd_boolean ret = TRUE; 2405 struct elf_m32r_link_hash_table *htab = m32r_elf_hash_table (info); 2406 bfd *dynobj; 2407 bfd_vma *local_got_offsets; 2408 asection *sgot, *splt, *sreloc; 2409 bfd_vma high_address = bfd_get_section_limit (input_bfd, input_section); 2410 2411 if (htab == NULL) 2412 return FALSE; 2413 2414 dynobj = htab->root.dynobj; 2415 local_got_offsets = elf_local_got_offsets (input_bfd); 2416 2417 sgot = htab->sgot; 2418 splt = htab->splt; 2419 sreloc = NULL; 2420 2421 rel = relocs; 2422 relend = relocs + input_section->reloc_count; 2423 for (; rel < relend; rel++) 2424 { 2425 int r_type; 2426 reloc_howto_type *howto; 2427 unsigned long r_symndx; 2428 struct elf_link_hash_entry *h; 2429 /* We can't modify r_addend here as elf_link_input_bfd has an assert to 2430 ensure it's zero (we use REL relocs, not RELA). Therefore this 2431 should be assigning zero to `addend', but for clarity we use 2432 `r_addend'. */ 2433 bfd_vma addend = rel->r_addend; 2434 bfd_vma offset = rel->r_offset; 2435 bfd_vma relocation; 2436 Elf_Internal_Sym *sym; 2437 asection *sec; 2438 const char *sym_name; 2439 bfd_reloc_status_type r; 2440 const char *errmsg = NULL; 2441 bfd_boolean use_rel = FALSE; 2442 2443 h = NULL; 2444 r_type = ELF32_R_TYPE (rel->r_info); 2445 if (r_type < 0 || r_type >= (int) R_M32R_max) 2446 { 2447 (*_bfd_error_handler) (_("%B: unknown relocation type %d"), 2448 input_bfd, 2449 (int) r_type); 2450 bfd_set_error (bfd_error_bad_value); 2451 ret = FALSE; 2452 continue; 2453 } 2454 2455 if ( r_type == R_M32R_GNU_VTENTRY 2456 || r_type == R_M32R_GNU_VTINHERIT 2457 || r_type == R_M32R_NONE 2458 || r_type == R_M32R_RELA_GNU_VTENTRY 2459 || r_type == R_M32R_RELA_GNU_VTINHERIT) 2460 continue; 2461 2462 if (r_type <= R_M32R_GNU_VTENTRY) 2463 use_rel = TRUE; 2464 2465 howto = m32r_elf_howto_table + r_type; 2466 r_symndx = ELF32_R_SYM (rel->r_info); 2467 2468 sym = NULL; 2469 sec = NULL; 2470 h = NULL; 2471 2472 if (r_symndx < symtab_hdr->sh_info) 2473 { 2474 /* Local symbol. */ 2475 sym = local_syms + r_symndx; 2476 sec = local_sections[r_symndx]; 2477 sym_name = "<local symbol>"; 2478 2479 if (!use_rel) 2480 { 2481 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2482 addend = rel->r_addend; 2483 } 2484 else 2485 { 2486 relocation = (sec->output_section->vma 2487 + sec->output_offset 2488 + sym->st_value); 2489 } 2490 } 2491 else 2492 { 2493 /* External symbol. */ 2494 relocation = 0; 2495 2496 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 2497 2498 if (info->wrap_hash != NULL 2499 && (input_section->flags & SEC_DEBUGGING) != 0) 2500 h = ((struct elf_link_hash_entry *) 2501 unwrap_hash_lookup (info, input_bfd, &h->root)); 2502 2503 while (h->root.type == bfd_link_hash_indirect 2504 || h->root.type == bfd_link_hash_warning) 2505 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2506 sym_name = h->root.root.string; 2507 2508 if (h->root.type == bfd_link_hash_defined 2509 || h->root.type == bfd_link_hash_defweak) 2510 { 2511 bfd_boolean dyn; 2512 sec = h->root.u.def.section; 2513 2514 dyn = htab->root.dynamic_sections_created; 2515 sec = h->root.u.def.section; 2516 if (r_type == R_M32R_GOTPC24 2517 || (r_type == R_M32R_GOTPC_HI_ULO 2518 || r_type == R_M32R_GOTPC_HI_SLO 2519 || r_type == R_M32R_GOTPC_LO) 2520 || (r_type == R_M32R_26_PLTREL 2521 && h->plt.offset != (bfd_vma) -1) 2522 || ((r_type == R_M32R_GOT24 2523 || r_type == R_M32R_GOT16_HI_ULO 2524 || r_type == R_M32R_GOT16_HI_SLO 2525 || r_type == R_M32R_GOT16_LO) 2526 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 2527 bfd_link_pic (info), 2528 h) 2529 && (! bfd_link_pic (info) 2530 || (! info->symbolic && h->dynindx != -1) 2531 || !h->def_regular)) 2532 || (bfd_link_pic (info) 2533 && ((! info->symbolic && h->dynindx != -1) 2534 || !h->def_regular) 2535 && (((r_type == R_M32R_16_RELA 2536 || r_type == R_M32R_32_RELA 2537 || r_type == R_M32R_24_RELA 2538 || r_type == R_M32R_HI16_ULO_RELA 2539 || r_type == R_M32R_HI16_SLO_RELA 2540 || r_type == R_M32R_LO16_RELA) 2541 && !h->forced_local) 2542 || r_type == R_M32R_REL32 2543 || r_type == R_M32R_10_PCREL_RELA 2544 || r_type == R_M32R_18_PCREL_RELA 2545 || r_type == R_M32R_26_PCREL_RELA) 2546 && ((input_section->flags & SEC_ALLOC) != 0 2547 /* DWARF will emit R_M32R_16(24,32) relocations 2548 in its sections against symbols defined 2549 externally in shared libraries. We can't do 2550 anything with them here. */ 2551 || ((input_section->flags & SEC_DEBUGGING) != 0 2552 && h->def_dynamic)))) 2553 { 2554 /* In these cases, we don't need the relocation 2555 value. We check specially because in some 2556 obscure cases sec->output_section will be NULL. */ 2557 } 2558 else if (sec->output_section != NULL) 2559 relocation = (h->root.u.def.value 2560 + sec->output_section->vma 2561 + sec->output_offset); 2562 else if (!bfd_link_relocatable (info) 2563 && (_bfd_elf_section_offset (output_bfd, info, 2564 input_section, 2565 rel->r_offset) 2566 != (bfd_vma) -1)) 2567 { 2568 (*_bfd_error_handler) 2569 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), 2570 input_bfd, 2571 input_section, 2572 (long) rel->r_offset, 2573 howto->name, 2574 h->root.root.string); 2575 } 2576 } 2577 else if (h->root.type == bfd_link_hash_undefweak) 2578 ; 2579 else if (info->unresolved_syms_in_objects == RM_IGNORE 2580 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) 2581 ; 2582 else if (!bfd_link_relocatable (info)) 2583 (*info->callbacks->undefined_symbol) 2584 (info, h->root.root.string, input_bfd, 2585 input_section, offset, 2586 (info->unresolved_syms_in_objects == RM_GENERATE_ERROR 2587 || ELF_ST_VISIBILITY (h->other))); 2588 } 2589 2590 if (sec != NULL && discarded_section (sec)) 2591 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2592 rel, 1, relend, howto, 0, contents); 2593 2594 if (bfd_link_relocatable (info) && !use_rel) 2595 { 2596 /* This is a relocatable link. We don't have to change 2597 anything, unless the reloc is against a section symbol, 2598 in which case we have to adjust according to where the 2599 section symbol winds up in the output section. */ 2600 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) 2601 rel->r_addend += sec->output_offset; 2602 continue; 2603 } 2604 2605 if (bfd_link_relocatable (info) && use_rel) 2606 { 2607 /* This is a relocatable link. We don't have to change 2608 anything, unless the reloc is against a section symbol, 2609 in which case we have to adjust according to where the 2610 section symbol winds up in the output section. */ 2611 if (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION) 2612 continue; 2613 2614 addend += sec->output_offset; 2615 2616 /* If partial_inplace, we need to store any additional addend 2617 back in the section. */ 2618 if (! howto->partial_inplace) 2619 continue; 2620 /* ??? Here is a nice place to call a special_function 2621 like handler. */ 2622 if (r_type != R_M32R_HI16_SLO && r_type != R_M32R_HI16_ULO) 2623 r = _bfd_relocate_contents (howto, input_bfd, 2624 addend, contents + offset); 2625 else 2626 { 2627 Elf_Internal_Rela *lorel; 2628 2629 /* We allow an arbitrary number of HI16 relocs before the 2630 LO16 reloc. This permits gcc to emit the HI and LO relocs 2631 itself. */ 2632 for (lorel = rel + 1; 2633 (lorel < relend 2634 && (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO 2635 || ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO)); 2636 lorel++) 2637 continue; 2638 if (lorel < relend 2639 && ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16) 2640 { 2641 m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel, 2642 contents, addend); 2643 r = bfd_reloc_ok; 2644 } 2645 else 2646 r = _bfd_relocate_contents (howto, input_bfd, 2647 addend, contents + offset); 2648 } 2649 } 2650 else 2651 { 2652 /* Sanity check the address. */ 2653 if (offset > high_address) 2654 { 2655 r = bfd_reloc_outofrange; 2656 goto check_reloc; 2657 } 2658 2659 switch ((int) r_type) 2660 { 2661 case R_M32R_GOTOFF: 2662 /* Relocation is relative to the start of the global offset 2663 table (for ld24 rx, #uimm24). eg access at label+addend 2664 2665 ld24 rx. #label@GOTOFF + addend 2666 sub rx, r12. */ 2667 2668 BFD_ASSERT (sgot != NULL); 2669 2670 relocation = -(relocation - sgot->output_section->vma); 2671 rel->r_addend = -rel->r_addend; 2672 break; 2673 2674 case R_M32R_GOTOFF_HI_ULO: 2675 case R_M32R_GOTOFF_HI_SLO: 2676 case R_M32R_GOTOFF_LO: 2677 BFD_ASSERT (sgot != NULL); 2678 2679 relocation -= sgot->output_section->vma; 2680 2681 if ((r_type == R_M32R_GOTOFF_HI_SLO) 2682 && ((relocation + rel->r_addend) & 0x8000)) 2683 rel->r_addend += 0x10000; 2684 break; 2685 2686 case R_M32R_GOTPC24: 2687 /* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation 2688 ld24 rx,#_GLOBAL_OFFSET_TABLE_ 2689 */ 2690 relocation = sgot->output_section->vma; 2691 break; 2692 2693 case R_M32R_GOTPC_HI_ULO: 2694 case R_M32R_GOTPC_HI_SLO: 2695 case R_M32R_GOTPC_LO: 2696 { 2697 /* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation 2698 bl .+4 2699 seth rx,#high(_GLOBAL_OFFSET_TABLE_) 2700 or3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4) 2701 or 2702 bl .+4 2703 seth rx,#shigh(_GLOBAL_OFFSET_TABLE_) 2704 add3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4) 2705 */ 2706 relocation = sgot->output_section->vma; 2707 relocation -= (input_section->output_section->vma 2708 + input_section->output_offset 2709 + rel->r_offset); 2710 if ((r_type == R_M32R_GOTPC_HI_SLO) 2711 && ((relocation + rel->r_addend) & 0x8000)) 2712 rel->r_addend += 0x10000; 2713 2714 break; 2715 } 2716 case R_M32R_GOT16_HI_ULO: 2717 case R_M32R_GOT16_HI_SLO: 2718 case R_M32R_GOT16_LO: 2719 /* Fall through. */ 2720 case R_M32R_GOT24: 2721 /* Relocation is to the entry for this symbol in the global 2722 offset table. */ 2723 BFD_ASSERT (sgot != NULL); 2724 2725 if (h != NULL) 2726 { 2727 bfd_boolean dyn; 2728 bfd_vma off; 2729 2730 off = h->got.offset; 2731 BFD_ASSERT (off != (bfd_vma) -1); 2732 2733 dyn = htab->root.dynamic_sections_created; 2734 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 2735 bfd_link_pic (info), 2736 h) 2737 || (bfd_link_pic (info) 2738 && (info->symbolic 2739 || h->dynindx == -1 2740 || h->forced_local) 2741 && h->def_regular)) 2742 { 2743 /* This is actually a static link, or it is a 2744 -Bsymbolic link and the symbol is defined 2745 locally, or the symbol was forced to be local 2746 because of a version file. We must initialize 2747 this entry in the global offset table. Since the 2748 offset must always be a multiple of 4, we use the 2749 least significant bit to record whether we have 2750 initialized it already. 2751 2752 When doing a dynamic link, we create a .rela.got 2753 relocation entry to initialize the value. This 2754 is done in the finish_dynamic_symbol routine. */ 2755 if ((off & 1) != 0) 2756 off &= ~1; 2757 else 2758 { 2759 bfd_put_32 (output_bfd, relocation, 2760 sgot->contents + off); 2761 h->got.offset |= 1; 2762 } 2763 } 2764 2765 relocation = sgot->output_offset + off; 2766 } 2767 else 2768 { 2769 bfd_vma off; 2770 bfd_byte *loc; 2771 2772 BFD_ASSERT (local_got_offsets != NULL 2773 && local_got_offsets[r_symndx] != (bfd_vma) -1); 2774 2775 off = local_got_offsets[r_symndx]; 2776 2777 /* The offset must always be a multiple of 4. We use 2778 the least significant bit to record whether we have 2779 already processed this entry. */ 2780 if ((off & 1) != 0) 2781 off &= ~1; 2782 else 2783 { 2784 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 2785 2786 if (bfd_link_pic (info)) 2787 { 2788 asection *srelgot; 2789 Elf_Internal_Rela outrel; 2790 2791 /* We need to generate a R_M32R_RELATIVE reloc 2792 for the dynamic linker. */ 2793 srelgot = bfd_get_linker_section (dynobj, 2794 ".rela.got"); 2795 BFD_ASSERT (srelgot != NULL); 2796 2797 outrel.r_offset = (sgot->output_section->vma 2798 + sgot->output_offset 2799 + off); 2800 outrel.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); 2801 outrel.r_addend = relocation; 2802 loc = srelgot->contents; 2803 loc += srelgot->reloc_count * sizeof (Elf32_External_Rela); 2804 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); 2805 ++srelgot->reloc_count; 2806 } 2807 2808 local_got_offsets[r_symndx] |= 1; 2809 } 2810 2811 relocation = sgot->output_offset + off; 2812 } 2813 if ((r_type == R_M32R_GOT16_HI_SLO) 2814 && ((relocation + rel->r_addend) & 0x8000)) 2815 rel->r_addend += 0x10000; 2816 2817 break; 2818 2819 case R_M32R_26_PLTREL: 2820 /* Relocation is to the entry for this symbol in the 2821 procedure linkage table. */ 2822 2823 /* The native assembler will generate a 26_PLTREL reloc 2824 for a local symbol if you assemble a call from one 2825 section to another when using -K pic. */ 2826 if (h == NULL) 2827 break; 2828 2829 if (h->forced_local) 2830 break; 2831 2832 if (h->plt.offset == (bfd_vma) -1) 2833 /* We didn't make a PLT entry for this symbol. This 2834 happens when statically linking PIC code, or when 2835 using -Bsymbolic. */ 2836 break; 2837 2838 relocation = (splt->output_section->vma 2839 + splt->output_offset 2840 + h->plt.offset); 2841 break; 2842 2843 case R_M32R_HI16_SLO_RELA: 2844 if ((relocation + rel->r_addend) & 0x8000) 2845 rel->r_addend += 0x10000; 2846 /* Fall through. */ 2847 2848 case R_M32R_16_RELA: 2849 case R_M32R_24_RELA: 2850 case R_M32R_32_RELA: 2851 case R_M32R_REL32: 2852 case R_M32R_10_PCREL_RELA: 2853 case R_M32R_18_PCREL_RELA: 2854 case R_M32R_26_PCREL_RELA: 2855 case R_M32R_HI16_ULO_RELA: 2856 case R_M32R_LO16_RELA: 2857 if (bfd_link_pic (info) 2858 && r_symndx != STN_UNDEF 2859 && (input_section->flags & SEC_ALLOC) != 0 2860 && (( r_type != R_M32R_10_PCREL_RELA 2861 && r_type != R_M32R_18_PCREL_RELA 2862 && r_type != R_M32R_26_PCREL_RELA 2863 && r_type != R_M32R_REL32) 2864 || (h != NULL 2865 && h->dynindx != -1 2866 && (! info->symbolic 2867 || !h->def_regular)))) 2868 { 2869 Elf_Internal_Rela outrel; 2870 bfd_boolean skip, relocate; 2871 bfd_byte *loc; 2872 2873 /* When generating a shared object, these relocations 2874 are copied into the output file to be resolved at run 2875 time. */ 2876 if (sreloc == NULL) 2877 { 2878 sreloc = _bfd_elf_get_dynamic_reloc_section 2879 (input_bfd, input_section, /*rela?*/ TRUE); 2880 if (sreloc == NULL) 2881 return FALSE; 2882 } 2883 2884 skip = FALSE; 2885 relocate = FALSE; 2886 2887 outrel.r_offset = _bfd_elf_section_offset (output_bfd, 2888 info, 2889 input_section, 2890 rel->r_offset); 2891 if (outrel.r_offset == (bfd_vma) -1) 2892 skip = TRUE; 2893 else if (outrel.r_offset == (bfd_vma) -2) 2894 skip = relocate = TRUE; 2895 outrel.r_offset += (input_section->output_section->vma 2896 + input_section->output_offset); 2897 2898 if (skip) 2899 memset (&outrel, 0, sizeof outrel); 2900 else if ( r_type == R_M32R_10_PCREL_RELA 2901 || r_type == R_M32R_18_PCREL_RELA 2902 || r_type == R_M32R_26_PCREL_RELA 2903 || r_type == R_M32R_REL32) 2904 { 2905 BFD_ASSERT (h != NULL && h->dynindx != -1); 2906 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 2907 outrel.r_addend = rel->r_addend; 2908 } 2909 else 2910 { 2911 /* h->dynindx may be -1 if this symbol was marked to 2912 become local. */ 2913 if (h == NULL 2914 || ((info->symbolic || h->dynindx == -1) 2915 && h->def_regular)) 2916 { 2917 relocate = TRUE; 2918 outrel.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); 2919 outrel.r_addend = relocation + rel->r_addend; 2920 } 2921 else 2922 { 2923 BFD_ASSERT (h->dynindx != -1); 2924 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 2925 outrel.r_addend = relocation + rel->r_addend; 2926 } 2927 } 2928 2929 loc = sreloc->contents; 2930 loc += sreloc->reloc_count * sizeof (Elf32_External_Rela); 2931 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); 2932 ++sreloc->reloc_count; 2933 2934 /* If this reloc is against an external symbol, we do 2935 not want to fiddle with the addend. Otherwise, we 2936 need to include the symbol value so that it becomes 2937 an addend for the dynamic reloc. */ 2938 if (! relocate) 2939 continue; 2940 break; 2941 } 2942 else if (r_type != R_M32R_10_PCREL_RELA) 2943 break; 2944 /* Fall through. */ 2945 2946 case (int) R_M32R_10_PCREL : 2947 r = m32r_elf_do_10_pcrel_reloc (input_bfd, howto, input_section, 2948 contents, offset, 2949 sec, relocation, addend); 2950 goto check_reloc; 2951 2952 case (int) R_M32R_HI16_SLO : 2953 case (int) R_M32R_HI16_ULO : 2954 { 2955 Elf_Internal_Rela *lorel; 2956 2957 /* We allow an arbitrary number of HI16 relocs before the 2958 LO16 reloc. This permits gcc to emit the HI and LO relocs 2959 itself. */ 2960 for (lorel = rel + 1; 2961 (lorel < relend 2962 && (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO 2963 || ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO)); 2964 lorel++) 2965 continue; 2966 if (lorel < relend 2967 && ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16) 2968 { 2969 m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel, 2970 contents, relocation + addend); 2971 r = bfd_reloc_ok; 2972 } 2973 else 2974 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 2975 contents, offset, 2976 relocation, addend); 2977 } 2978 2979 goto check_reloc; 2980 2981 case (int) R_M32R_SDA16_RELA: 2982 case (int) R_M32R_SDA16 : 2983 { 2984 const char *name; 2985 2986 BFD_ASSERT (sec != NULL); 2987 name = bfd_get_section_name (sec->owner, sec); 2988 2989 if ( strcmp (name, ".sdata") == 0 2990 || strcmp (name, ".sbss") == 0 2991 || strcmp (name, ".scommon") == 0) 2992 { 2993 bfd_vma sda_base; 2994 bfd *out_bfd = sec->output_section->owner; 2995 2996 r = m32r_elf_final_sda_base (out_bfd, info, 2997 &errmsg, 2998 &sda_base); 2999 if (r != bfd_reloc_ok) 3000 { 3001 ret = FALSE; 3002 goto check_reloc; 3003 } 3004 3005 /* At this point `relocation' contains the object's 3006 address. */ 3007 relocation -= sda_base; 3008 /* Now it contains the offset from _SDA_BASE_. */ 3009 } 3010 else 3011 { 3012 (*_bfd_error_handler) 3013 (_("%B: The target (%s) of an %s relocation is in the wrong section (%A)"), 3014 input_bfd, 3015 sec, 3016 sym_name, 3017 m32r_elf_howto_table[(int) r_type].name); 3018 /*bfd_set_error (bfd_error_bad_value); ??? why? */ 3019 ret = FALSE; 3020 continue; 3021 } 3022 } 3023 /* Fall through. */ 3024 3025 default : /* OLD_M32R_RELOC */ 3026 3027 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3028 contents, offset, 3029 relocation, addend); 3030 goto check_reloc; 3031 } 3032 3033 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3034 contents, rel->r_offset, 3035 relocation, rel->r_addend); 3036 3037 } 3038 3039 check_reloc: 3040 3041 if (r != bfd_reloc_ok) 3042 { 3043 /* FIXME: This should be generic enough to go in a utility. */ 3044 const char *name; 3045 3046 if (h != NULL) 3047 name = h->root.root.string; 3048 else 3049 { 3050 name = (bfd_elf_string_from_elf_section 3051 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 3052 if (name == NULL || *name == '\0') 3053 name = bfd_section_name (input_bfd, sec); 3054 } 3055 3056 if (errmsg != NULL) 3057 goto common_error; 3058 3059 switch (r) 3060 { 3061 case bfd_reloc_overflow: 3062 (*info->callbacks->reloc_overflow) 3063 (info, (h ? &h->root : NULL), name, howto->name, 3064 (bfd_vma) 0, input_bfd, input_section, offset); 3065 break; 3066 3067 case bfd_reloc_undefined: 3068 (*info->callbacks->undefined_symbol) 3069 (info, name, input_bfd, input_section, offset, TRUE); 3070 break; 3071 3072 case bfd_reloc_outofrange: 3073 errmsg = _("internal error: out of range error"); 3074 goto common_error; 3075 3076 case bfd_reloc_notsupported: 3077 errmsg = _("internal error: unsupported relocation error"); 3078 goto common_error; 3079 3080 case bfd_reloc_dangerous: 3081 errmsg = _("internal error: dangerous error"); 3082 goto common_error; 3083 3084 default: 3085 errmsg = _("internal error: unknown error"); 3086 /* fall through */ 3087 3088 common_error: 3089 (*info->callbacks->warning) (info, errmsg, name, input_bfd, 3090 input_section, offset); 3091 break; 3092 } 3093 } 3094 } 3095 3096 return ret; 3097 } 3098 3099 /* Finish up dynamic symbol handling. We set the contents of various 3100 dynamic sections here. */ 3101 3102 static bfd_boolean 3103 m32r_elf_finish_dynamic_symbol (bfd *output_bfd, 3104 struct bfd_link_info *info, 3105 struct elf_link_hash_entry *h, 3106 Elf_Internal_Sym *sym) 3107 { 3108 struct elf_m32r_link_hash_table *htab; 3109 bfd_byte *loc; 3110 3111 #ifdef DEBUG_PIC 3112 printf ("m32r_elf_finish_dynamic_symbol()\n"); 3113 #endif 3114 3115 htab = m32r_elf_hash_table (info); 3116 if (htab == NULL) 3117 return FALSE; 3118 3119 if (h->plt.offset != (bfd_vma) -1) 3120 { 3121 asection *splt; 3122 asection *sgot; 3123 asection *srela; 3124 3125 bfd_vma plt_index; 3126 bfd_vma got_offset; 3127 Elf_Internal_Rela rela; 3128 3129 /* This symbol has an entry in the procedure linkage table. Set 3130 it up. */ 3131 3132 BFD_ASSERT (h->dynindx != -1); 3133 3134 splt = htab->splt; 3135 sgot = htab->sgotplt; 3136 srela = htab->srelplt; 3137 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); 3138 3139 /* Get the index in the procedure linkage table which 3140 corresponds to this symbol. This is the index of this symbol 3141 in all the symbols for which we are making plt entries. The 3142 first entry in the procedure linkage table is reserved. */ 3143 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 3144 3145 /* Get the offset into the .got table of the entry that 3146 corresponds to this function. Each .got entry is 4 bytes. 3147 The first three are reserved. */ 3148 got_offset = (plt_index + 3) * 4; 3149 3150 /* Fill in the entry in the procedure linkage table. */ 3151 if (! bfd_link_pic (info)) 3152 { 3153 bfd_put_32 (output_bfd, 3154 (PLT_ENTRY_WORD0b 3155 + (((sgot->output_section->vma 3156 + sgot->output_offset 3157 + got_offset) >> 16) & 0xffff)), 3158 splt->contents + h->plt.offset); 3159 bfd_put_32 (output_bfd, 3160 (PLT_ENTRY_WORD1b 3161 + ((sgot->output_section->vma 3162 + sgot->output_offset 3163 + got_offset) & 0xffff)), 3164 splt->contents + h->plt.offset + 4); 3165 bfd_put_32 (output_bfd, PLT_ENTRY_WORD2, 3166 splt->contents + h->plt.offset + 8); 3167 bfd_put_32 (output_bfd, 3168 (PLT_ENTRY_WORD3 3169 + plt_index * sizeof (Elf32_External_Rela)), 3170 splt->contents + h->plt.offset + 12); 3171 bfd_put_32 (output_bfd, 3172 (PLT_ENTRY_WORD4 3173 + (((unsigned int) ((- (h->plt.offset + 16)) >> 2)) & 0xffffff)), 3174 splt->contents + h->plt.offset + 16); 3175 } 3176 else 3177 { 3178 bfd_put_32 (output_bfd, 3179 PLT_ENTRY_WORD0 + got_offset, 3180 splt->contents + h->plt.offset); 3181 bfd_put_32 (output_bfd, PLT_ENTRY_WORD1, 3182 splt->contents + h->plt.offset + 4); 3183 bfd_put_32 (output_bfd, PLT_ENTRY_WORD2, 3184 splt->contents + h->plt.offset + 8); 3185 bfd_put_32 (output_bfd, 3186 (PLT_ENTRY_WORD3 3187 + plt_index * sizeof (Elf32_External_Rela)), 3188 splt->contents + h->plt.offset + 12); 3189 bfd_put_32 (output_bfd, 3190 (PLT_ENTRY_WORD4 3191 + (((unsigned int) ((- (h->plt.offset + 16)) >> 2)) & 0xffffff)), 3192 splt->contents + h->plt.offset + 16); 3193 } 3194 3195 /* Fill in the entry in the global offset table. */ 3196 bfd_put_32 (output_bfd, 3197 (splt->output_section->vma 3198 + splt->output_offset 3199 + h->plt.offset 3200 + 12), /* same offset */ 3201 sgot->contents + got_offset); 3202 3203 /* Fill in the entry in the .rela.plt section. */ 3204 rela.r_offset = (sgot->output_section->vma 3205 + sgot->output_offset 3206 + got_offset); 3207 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_JMP_SLOT); 3208 rela.r_addend = 0; 3209 loc = srela->contents; 3210 loc += plt_index * sizeof (Elf32_External_Rela); 3211 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3212 3213 if (!h->def_regular) 3214 { 3215 /* Mark the symbol as undefined, rather than as defined in 3216 the .plt section. Leave the value alone. */ 3217 sym->st_shndx = SHN_UNDEF; 3218 } 3219 } 3220 3221 if (h->got.offset != (bfd_vma) -1) 3222 { 3223 asection *sgot; 3224 asection *srela; 3225 Elf_Internal_Rela rela; 3226 3227 /* This symbol has an entry in the global offset table. Set it 3228 up. */ 3229 3230 sgot = htab->sgot; 3231 srela = htab->srelgot; 3232 BFD_ASSERT (sgot != NULL && srela != NULL); 3233 3234 rela.r_offset = (sgot->output_section->vma 3235 + sgot->output_offset 3236 + (h->got.offset &~ 1)); 3237 3238 /* If this is a -Bsymbolic link, and the symbol is defined 3239 locally, we just want to emit a RELATIVE reloc. Likewise if 3240 the symbol was forced to be local because of a version file. 3241 The entry in the global offset table will already have been 3242 initialized in the relocate_section function. */ 3243 if (bfd_link_pic (info) 3244 && (info->symbolic 3245 || h->dynindx == -1 3246 || h->forced_local) 3247 && h->def_regular) 3248 { 3249 rela.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); 3250 rela.r_addend = (h->root.u.def.value 3251 + h->root.u.def.section->output_section->vma 3252 + h->root.u.def.section->output_offset); 3253 } 3254 else 3255 { 3256 BFD_ASSERT ((h->got.offset & 1) == 0); 3257 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); 3258 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_GLOB_DAT); 3259 rela.r_addend = 0; 3260 } 3261 3262 loc = srela->contents; 3263 loc += srela->reloc_count * sizeof (Elf32_External_Rela); 3264 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3265 ++srela->reloc_count; 3266 } 3267 3268 if (h->needs_copy) 3269 { 3270 asection *s; 3271 Elf_Internal_Rela rela; 3272 3273 /* This symbols needs a copy reloc. Set it up. */ 3274 3275 BFD_ASSERT (h->dynindx != -1 3276 && (h->root.type == bfd_link_hash_defined 3277 || h->root.type == bfd_link_hash_defweak)); 3278 3279 s = bfd_get_linker_section (htab->root.dynobj, ".rela.bss"); 3280 BFD_ASSERT (s != NULL); 3281 3282 rela.r_offset = (h->root.u.def.value 3283 + h->root.u.def.section->output_section->vma 3284 + h->root.u.def.section->output_offset); 3285 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_COPY); 3286 rela.r_addend = 0; 3287 loc = s->contents; 3288 loc += s->reloc_count * sizeof (Elf32_External_Rela); 3289 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3290 ++s->reloc_count; 3291 } 3292 3293 /* Mark some specially defined symbols as absolute. */ 3294 if (h == htab->root.hdynamic || h == htab->root.hgot) 3295 sym->st_shndx = SHN_ABS; 3296 3297 return TRUE; 3298 } 3299 3300 3301 /* Finish up the dynamic sections. */ 3302 3303 static bfd_boolean 3304 m32r_elf_finish_dynamic_sections (bfd *output_bfd, 3305 struct bfd_link_info *info) 3306 { 3307 struct elf_m32r_link_hash_table *htab; 3308 bfd *dynobj; 3309 asection *sdyn; 3310 asection *sgot; 3311 3312 #ifdef DEBUG_PIC 3313 printf ("m32r_elf_finish_dynamic_sections()\n"); 3314 #endif 3315 3316 htab = m32r_elf_hash_table (info); 3317 if (htab == NULL) 3318 return FALSE; 3319 3320 dynobj = htab->root.dynobj; 3321 3322 sgot = htab->sgotplt; 3323 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 3324 3325 if (htab->root.dynamic_sections_created) 3326 { 3327 asection *splt; 3328 Elf32_External_Dyn *dyncon, *dynconend; 3329 3330 BFD_ASSERT (sgot != NULL && sdyn != NULL); 3331 3332 dyncon = (Elf32_External_Dyn *) sdyn->contents; 3333 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 3334 3335 for (; dyncon < dynconend; dyncon++) 3336 { 3337 Elf_Internal_Dyn dyn; 3338 asection *s; 3339 3340 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 3341 3342 switch (dyn.d_tag) 3343 { 3344 default: 3345 break; 3346 3347 case DT_PLTGOT: 3348 s = htab->sgotplt; 3349 goto get_vma; 3350 case DT_JMPREL: 3351 s = htab->srelplt; 3352 get_vma: 3353 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 3354 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3355 break; 3356 3357 case DT_PLTRELSZ: 3358 s = htab->srelplt; 3359 dyn.d_un.d_val = s->size; 3360 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3361 break; 3362 3363 case DT_RELASZ: 3364 /* My reading of the SVR4 ABI indicates that the 3365 procedure linkage table relocs (DT_JMPREL) should be 3366 included in the overall relocs (DT_RELA). This is 3367 what Solaris does. However, UnixWare can not handle 3368 that case. Therefore, we override the DT_RELASZ entry 3369 here to make it not include the JMPREL relocs. Since 3370 the linker script arranges for .rela.plt to follow all 3371 other relocation sections, we don't have to worry 3372 about changing the DT_RELA entry. */ 3373 if (htab->srelplt != NULL) 3374 { 3375 s = htab->srelplt; 3376 dyn.d_un.d_val -= s->size; 3377 } 3378 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3379 break; 3380 } 3381 } 3382 3383 /* Fill in the first entry in the procedure linkage table. */ 3384 splt = htab->splt; 3385 if (splt && splt->size > 0) 3386 { 3387 if (bfd_link_pic (info)) 3388 { 3389 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents); 3390 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4); 3391 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8); 3392 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12); 3393 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16); 3394 } 3395 else 3396 { 3397 unsigned long addr; 3398 /* addr = .got + 4 */ 3399 addr = sgot->output_section->vma + sgot->output_offset + 4; 3400 bfd_put_32 (output_bfd, 3401 PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), 3402 splt->contents); 3403 bfd_put_32 (output_bfd, 3404 PLT0_ENTRY_WORD1 | (addr & 0xffff), 3405 splt->contents + 4); 3406 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); 3407 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); 3408 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); 3409 } 3410 3411 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 3412 PLT_ENTRY_SIZE; 3413 } 3414 } 3415 3416 /* Fill in the first three entries in the global offset table. */ 3417 if (sgot && sgot->size > 0) 3418 { 3419 if (sdyn == NULL) 3420 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 3421 else 3422 bfd_put_32 (output_bfd, 3423 sdyn->output_section->vma + sdyn->output_offset, 3424 sgot->contents); 3425 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); 3426 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); 3427 3428 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 3429 } 3430 3431 return TRUE; 3432 } 3433 3434 3435 /* Set the right machine number. */ 3436 3437 static bfd_boolean 3438 m32r_elf_object_p (bfd *abfd) 3439 { 3440 switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH) 3441 { 3442 default: 3443 case E_M32R_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32r); break; 3444 case E_M32RX_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32rx); break; 3445 case E_M32R2_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32r2); break; 3446 } 3447 return TRUE; 3448 } 3449 3450 /* Store the machine number in the flags field. */ 3451 3452 static void 3453 m32r_elf_final_write_processing (bfd *abfd, 3454 bfd_boolean linker ATTRIBUTE_UNUSED) 3455 { 3456 unsigned long val; 3457 3458 switch (bfd_get_mach (abfd)) 3459 { 3460 default: 3461 case bfd_mach_m32r: val = E_M32R_ARCH; break; 3462 case bfd_mach_m32rx: val = E_M32RX_ARCH; break; 3463 case bfd_mach_m32r2: val = E_M32R2_ARCH; break; 3464 } 3465 3466 elf_elfheader (abfd)->e_flags &=~ EF_M32R_ARCH; 3467 elf_elfheader (abfd)->e_flags |= val; 3468 } 3469 3470 /* Function to keep M32R specific file flags. */ 3471 3472 static bfd_boolean 3473 m32r_elf_set_private_flags (bfd *abfd, flagword flags) 3474 { 3475 BFD_ASSERT (!elf_flags_init (abfd) 3476 || elf_elfheader (abfd)->e_flags == flags); 3477 3478 elf_elfheader (abfd)->e_flags = flags; 3479 elf_flags_init (abfd) = TRUE; 3480 return TRUE; 3481 } 3482 3483 /* Merge backend specific data from an object file to the output 3484 object file when linking. */ 3485 3486 static bfd_boolean 3487 m32r_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 3488 { 3489 flagword out_flags; 3490 flagword in_flags; 3491 3492 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour 3493 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 3494 return TRUE; 3495 3496 in_flags = elf_elfheader (ibfd)->e_flags; 3497 out_flags = elf_elfheader (obfd)->e_flags; 3498 3499 if (! elf_flags_init (obfd)) 3500 { 3501 /* If the input is the default architecture then do not 3502 bother setting the flags for the output architecture, 3503 instead allow future merges to do this. If no future 3504 merges ever set these flags then they will retain their 3505 unitialised values, which surprise surprise, correspond 3506 to the default values. */ 3507 if (bfd_get_arch_info (ibfd)->the_default) 3508 return TRUE; 3509 3510 elf_flags_init (obfd) = TRUE; 3511 elf_elfheader (obfd)->e_flags = in_flags; 3512 3513 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) 3514 && bfd_get_arch_info (obfd)->the_default) 3515 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), 3516 bfd_get_mach (ibfd)); 3517 3518 return TRUE; 3519 } 3520 3521 /* Check flag compatibility. */ 3522 if (in_flags == out_flags) 3523 return TRUE; 3524 3525 if ((in_flags & EF_M32R_ARCH) != (out_flags & EF_M32R_ARCH)) 3526 { 3527 if ( ((in_flags & EF_M32R_ARCH) != E_M32R_ARCH) 3528 || ((out_flags & EF_M32R_ARCH) == E_M32R_ARCH) 3529 || ((in_flags & EF_M32R_ARCH) == E_M32R2_ARCH)) 3530 { 3531 (*_bfd_error_handler) 3532 (_("%B: Instruction set mismatch with previous modules"), ibfd); 3533 3534 bfd_set_error (bfd_error_bad_value); 3535 return FALSE; 3536 } 3537 } 3538 3539 return TRUE; 3540 } 3541 3542 /* Display the flags field. */ 3543 3544 static bfd_boolean 3545 m32r_elf_print_private_bfd_data (bfd *abfd, void * ptr) 3546 { 3547 FILE * file = (FILE *) ptr; 3548 3549 BFD_ASSERT (abfd != NULL && ptr != NULL); 3550 3551 _bfd_elf_print_private_bfd_data (abfd, ptr); 3552 3553 fprintf (file, _("private flags = %lx"), elf_elfheader (abfd)->e_flags); 3554 3555 switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH) 3556 { 3557 default: 3558 case E_M32R_ARCH: fprintf (file, _(": m32r instructions")); break; 3559 case E_M32RX_ARCH: fprintf (file, _(": m32rx instructions")); break; 3560 case E_M32R2_ARCH: fprintf (file, _(": m32r2 instructions")); break; 3561 } 3562 3563 fputc ('\n', file); 3564 3565 return TRUE; 3566 } 3567 3568 static asection * 3569 m32r_elf_gc_mark_hook (asection *sec, 3570 struct bfd_link_info *info, 3571 Elf_Internal_Rela *rel, 3572 struct elf_link_hash_entry *h, 3573 Elf_Internal_Sym *sym) 3574 { 3575 if (h != NULL) 3576 switch (ELF32_R_TYPE (rel->r_info)) 3577 { 3578 case R_M32R_GNU_VTINHERIT: 3579 case R_M32R_GNU_VTENTRY: 3580 case R_M32R_RELA_GNU_VTINHERIT: 3581 case R_M32R_RELA_GNU_VTENTRY: 3582 return NULL; 3583 } 3584 3585 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 3586 } 3587 3588 static bfd_boolean 3589 m32r_elf_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, 3590 struct bfd_link_info *info ATTRIBUTE_UNUSED, 3591 asection *sec ATTRIBUTE_UNUSED, 3592 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) 3593 { 3594 /* Update the got entry reference counts for the section being removed. */ 3595 Elf_Internal_Shdr *symtab_hdr; 3596 struct elf_link_hash_entry **sym_hashes; 3597 bfd_signed_vma *local_got_refcounts; 3598 const Elf_Internal_Rela *rel, *relend; 3599 3600 if (bfd_link_relocatable (info)) 3601 return TRUE; 3602 3603 elf_section_data (sec)->local_dynrel = NULL; 3604 3605 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 3606 sym_hashes = elf_sym_hashes (abfd); 3607 local_got_refcounts = elf_local_got_refcounts (abfd); 3608 3609 relend = relocs + sec->reloc_count; 3610 for (rel = relocs; rel < relend; rel++) 3611 { 3612 unsigned long r_symndx; 3613 struct elf_link_hash_entry *h = NULL; 3614 3615 r_symndx = ELF32_R_SYM (rel->r_info); 3616 if (r_symndx >= symtab_hdr->sh_info) 3617 { 3618 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3619 while (h->root.type == bfd_link_hash_indirect 3620 || h->root.type == bfd_link_hash_warning) 3621 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3622 } 3623 3624 switch (ELF32_R_TYPE (rel->r_info)) 3625 { 3626 case R_M32R_GOT16_HI_ULO: 3627 case R_M32R_GOT16_HI_SLO: 3628 case R_M32R_GOT16_LO: 3629 case R_M32R_GOTOFF: 3630 case R_M32R_GOTOFF_HI_ULO: 3631 case R_M32R_GOTOFF_HI_SLO: 3632 case R_M32R_GOTOFF_LO: 3633 case R_M32R_GOT24: 3634 case R_M32R_GOTPC_HI_ULO: 3635 case R_M32R_GOTPC_HI_SLO: 3636 case R_M32R_GOTPC_LO: 3637 case R_M32R_GOTPC24: 3638 if (h != NULL) 3639 { 3640 if (h->got.refcount > 0) 3641 h->got.refcount--; 3642 } 3643 else 3644 { 3645 if (local_got_refcounts && local_got_refcounts[r_symndx] > 0) 3646 local_got_refcounts[r_symndx]--; 3647 } 3648 break; 3649 3650 case R_M32R_16_RELA: 3651 case R_M32R_24_RELA: 3652 case R_M32R_32_RELA: 3653 case R_M32R_REL32: 3654 case R_M32R_HI16_ULO_RELA: 3655 case R_M32R_HI16_SLO_RELA: 3656 case R_M32R_LO16_RELA: 3657 case R_M32R_SDA16_RELA: 3658 case R_M32R_10_PCREL_RELA: 3659 case R_M32R_18_PCREL_RELA: 3660 case R_M32R_26_PCREL_RELA: 3661 if (h != NULL) 3662 { 3663 struct elf_m32r_link_hash_entry *eh; 3664 struct elf_m32r_dyn_relocs **pp; 3665 struct elf_m32r_dyn_relocs *p; 3666 3667 if (!bfd_link_pic (info) && h->plt.refcount > 0) 3668 h->plt.refcount -= 1; 3669 3670 eh = (struct elf_m32r_link_hash_entry *) h; 3671 3672 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 3673 if (p->sec == sec) 3674 { 3675 if ( ELF32_R_TYPE (rel->r_info) == R_M32R_26_PCREL_RELA 3676 || ELF32_R_TYPE (rel->r_info) == R_M32R_18_PCREL_RELA 3677 || ELF32_R_TYPE (rel->r_info) == R_M32R_10_PCREL_RELA 3678 || ELF32_R_TYPE (rel->r_info) == R_M32R_REL32) 3679 p->pc_count -= 1; 3680 p->count -= 1; 3681 if (p->count == 0) 3682 *pp = p->next; 3683 break; 3684 } 3685 } 3686 break; 3687 3688 case R_M32R_26_PLTREL: 3689 if (h != NULL) 3690 { 3691 if (h->plt.refcount > 0) 3692 h->plt.refcount--; 3693 } 3694 break; 3695 3696 default: 3697 break; 3698 } 3699 } 3700 3701 return TRUE; 3702 } 3703 3704 /* Look through the relocs for a section during the first phase. 3705 Since we don't do .gots or .plts, we just need to consider the 3706 virtual table relocs for gc. */ 3707 3708 static bfd_boolean 3709 m32r_elf_check_relocs (bfd *abfd, 3710 struct bfd_link_info *info, 3711 asection *sec, 3712 const Elf_Internal_Rela *relocs) 3713 { 3714 Elf_Internal_Shdr *symtab_hdr; 3715 struct elf_link_hash_entry **sym_hashes; 3716 const Elf_Internal_Rela *rel; 3717 const Elf_Internal_Rela *rel_end; 3718 struct elf_m32r_link_hash_table *htab; 3719 bfd *dynobj; 3720 asection *sreloc; 3721 3722 if (bfd_link_relocatable (info)) 3723 return TRUE; 3724 3725 sreloc = NULL; 3726 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 3727 sym_hashes = elf_sym_hashes (abfd); 3728 3729 htab = m32r_elf_hash_table (info); 3730 if (htab == NULL) 3731 return FALSE; 3732 3733 dynobj = htab->root.dynobj; 3734 3735 rel_end = relocs + sec->reloc_count; 3736 for (rel = relocs; rel < rel_end; rel++) 3737 { 3738 int r_type; 3739 struct elf_link_hash_entry *h; 3740 unsigned long r_symndx; 3741 3742 r_symndx = ELF32_R_SYM (rel->r_info); 3743 r_type = ELF32_R_TYPE (rel->r_info); 3744 if (r_symndx < symtab_hdr->sh_info) 3745 h = NULL; 3746 else 3747 { 3748 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3749 while (h->root.type == bfd_link_hash_indirect 3750 || h->root.type == bfd_link_hash_warning) 3751 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3752 3753 /* PR15323, ref flags aren't set for references in the same 3754 object. */ 3755 h->root.non_ir_ref = 1; 3756 } 3757 3758 /* Some relocs require a global offset table. */ 3759 if (htab->sgot == NULL) 3760 { 3761 switch (r_type) 3762 { 3763 case R_M32R_GOT16_HI_ULO: 3764 case R_M32R_GOT16_HI_SLO: 3765 case R_M32R_GOTOFF: 3766 case R_M32R_GOTOFF_HI_ULO: 3767 case R_M32R_GOTOFF_HI_SLO: 3768 case R_M32R_GOTOFF_LO: 3769 case R_M32R_GOT16_LO: 3770 case R_M32R_GOTPC24: 3771 case R_M32R_GOTPC_HI_ULO: 3772 case R_M32R_GOTPC_HI_SLO: 3773 case R_M32R_GOTPC_LO: 3774 case R_M32R_GOT24: 3775 if (dynobj == NULL) 3776 htab->root.dynobj = dynobj = abfd; 3777 if (! create_got_section (dynobj, info)) 3778 return FALSE; 3779 break; 3780 3781 default: 3782 break; 3783 } 3784 } 3785 3786 switch (r_type) 3787 { 3788 case R_M32R_GOT16_HI_ULO: 3789 case R_M32R_GOT16_HI_SLO: 3790 case R_M32R_GOT16_LO: 3791 case R_M32R_GOT24: 3792 3793 if (h != NULL) 3794 h->got.refcount += 1; 3795 else 3796 { 3797 bfd_signed_vma *local_got_refcounts; 3798 3799 /* This is a global offset table entry for a local 3800 symbol. */ 3801 local_got_refcounts = elf_local_got_refcounts (abfd); 3802 if (local_got_refcounts == NULL) 3803 { 3804 bfd_size_type size; 3805 3806 size = symtab_hdr->sh_info; 3807 size *= sizeof (bfd_signed_vma); 3808 local_got_refcounts = bfd_zalloc (abfd, size); 3809 if (local_got_refcounts == NULL) 3810 return FALSE; 3811 elf_local_got_refcounts (abfd) = local_got_refcounts; 3812 } 3813 local_got_refcounts[r_symndx] += 1; 3814 } 3815 break; 3816 3817 case R_M32R_26_PLTREL: 3818 /* This symbol requires a procedure linkage table entry. We 3819 actually build the entry in adjust_dynamic_symbol, 3820 because this might be a case of linking PIC code without 3821 linking in any dynamic objects, in which case we don't 3822 need to generate a procedure linkage table after all. */ 3823 3824 /* If this is a local symbol, we resolve it directly without 3825 creating a procedure linkage table entry. */ 3826 if (h == NULL) 3827 continue; 3828 3829 if (h->forced_local) 3830 break; 3831 3832 h->needs_plt = 1; 3833 h->plt.refcount += 1; 3834 break; 3835 3836 case R_M32R_16_RELA: 3837 case R_M32R_24_RELA: 3838 case R_M32R_32_RELA: 3839 case R_M32R_REL32: 3840 case R_M32R_HI16_ULO_RELA: 3841 case R_M32R_HI16_SLO_RELA: 3842 case R_M32R_LO16_RELA: 3843 case R_M32R_SDA16_RELA: 3844 case R_M32R_10_PCREL_RELA: 3845 case R_M32R_18_PCREL_RELA: 3846 case R_M32R_26_PCREL_RELA: 3847 3848 if (h != NULL && !bfd_link_pic (info)) 3849 { 3850 h->non_got_ref = 1; 3851 h->plt.refcount += 1; 3852 } 3853 3854 /* If we are creating a shared library, and this is a reloc 3855 against a global symbol, or a non PC relative reloc 3856 against a local symbol, then we need to copy the reloc 3857 into the shared library. However, if we are linking with 3858 -Bsymbolic, we do not need to copy a reloc against a 3859 global symbol which is defined in an object we are 3860 including in the link (i.e., DEF_REGULAR is set). At 3861 this point we have not seen all the input files, so it is 3862 possible that DEF_REGULAR is not set now but will be set 3863 later (it is never cleared). We account for that 3864 possibility below by storing information in the 3865 dyn_relocs field of the hash table entry. A similar 3866 situation occurs when creating shared libraries and symbol 3867 visibility changes render the symbol local. 3868 3869 If on the other hand, we are creating an executable, we 3870 may need to keep relocations for symbols satisfied by a 3871 dynamic library if we manage to avoid copy relocs for the 3872 symbol. */ 3873 if ((bfd_link_pic (info) 3874 && (sec->flags & SEC_ALLOC) != 0 3875 && (( r_type != R_M32R_26_PCREL_RELA 3876 && r_type != R_M32R_18_PCREL_RELA 3877 && r_type != R_M32R_10_PCREL_RELA 3878 && r_type != R_M32R_REL32) 3879 || (h != NULL 3880 && (! info->symbolic 3881 || h->root.type == bfd_link_hash_defweak 3882 || !h->def_regular)))) 3883 || (!bfd_link_pic (info) 3884 && (sec->flags & SEC_ALLOC) != 0 3885 && h != NULL 3886 && (h->root.type == bfd_link_hash_defweak 3887 || !h->def_regular))) 3888 { 3889 struct elf_m32r_dyn_relocs *p; 3890 struct elf_m32r_dyn_relocs **head; 3891 3892 if (dynobj == NULL) 3893 htab->root.dynobj = dynobj = abfd; 3894 3895 /* When creating a shared object, we must copy these 3896 relocs into the output file. We create a reloc 3897 section in dynobj and make room for the reloc. */ 3898 if (sreloc == NULL) 3899 { 3900 sreloc = _bfd_elf_make_dynamic_reloc_section 3901 (sec, dynobj, 2, abfd, /*rela?*/ TRUE); 3902 3903 if (sreloc == NULL) 3904 return FALSE; 3905 } 3906 3907 /* If this is a global symbol, we count the number of 3908 relocations we need for this symbol. */ 3909 if (h != NULL) 3910 head = &((struct elf_m32r_link_hash_entry *) h)->dyn_relocs; 3911 else 3912 { 3913 /* Track dynamic relocs needed for local syms too. */ 3914 asection *s; 3915 void *vpp; 3916 Elf_Internal_Sym *isym; 3917 3918 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 3919 abfd, r_symndx); 3920 if (isym == NULL) 3921 return FALSE; 3922 3923 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 3924 if (s == NULL) 3925 s = sec; 3926 3927 vpp = &elf_section_data (s)->local_dynrel; 3928 head = (struct elf_m32r_dyn_relocs **) vpp; 3929 } 3930 3931 p = *head; 3932 if (p == NULL || p->sec != sec) 3933 { 3934 bfd_size_type amt = sizeof (*p); 3935 3936 p = bfd_alloc (dynobj, amt); 3937 if (p == NULL) 3938 return FALSE; 3939 p->next = *head; 3940 *head = p; 3941 p->sec = sec; 3942 p->count = 0; 3943 p->pc_count = 0; 3944 } 3945 3946 p->count += 1; 3947 if ( ELF32_R_TYPE (rel->r_info) == R_M32R_26_PCREL_RELA 3948 || ELF32_R_TYPE (rel->r_info) == R_M32R_18_PCREL_RELA 3949 || ELF32_R_TYPE (rel->r_info) == R_M32R_10_PCREL_RELA 3950 || ELF32_R_TYPE (rel->r_info) == R_M32R_REL32) 3951 p->pc_count += 1; 3952 } 3953 break; 3954 3955 /* This relocation describes the C++ object vtable hierarchy. 3956 Reconstruct it for later use during GC. */ 3957 case R_M32R_RELA_GNU_VTINHERIT: 3958 case R_M32R_GNU_VTINHERIT: 3959 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 3960 return FALSE; 3961 break; 3962 3963 /* This relocation describes which C++ vtable entries are actually 3964 used. Record for later use during GC. */ 3965 case R_M32R_GNU_VTENTRY: 3966 BFD_ASSERT (h != NULL); 3967 if (h != NULL 3968 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) 3969 return FALSE; 3970 break; 3971 case R_M32R_RELA_GNU_VTENTRY: 3972 BFD_ASSERT (h != NULL); 3973 if (h != NULL 3974 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 3975 return FALSE; 3976 break; 3977 } 3978 } 3979 3980 return TRUE; 3981 } 3982 3983 static const struct bfd_elf_special_section m32r_elf_special_sections[] = 3984 { 3985 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 3986 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 3987 { NULL, 0, 0, 0, 0 } 3988 }; 3989 3990 static enum elf_reloc_type_class 3991 m32r_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 3992 const asection *rel_sec ATTRIBUTE_UNUSED, 3993 const Elf_Internal_Rela *rela) 3994 { 3995 switch ((int) ELF32_R_TYPE (rela->r_info)) 3996 { 3997 case R_M32R_RELATIVE: return reloc_class_relative; 3998 case R_M32R_JMP_SLOT: return reloc_class_plt; 3999 case R_M32R_COPY: return reloc_class_copy; 4000 default: return reloc_class_normal; 4001 } 4002 } 4003 4004 #define ELF_ARCH bfd_arch_m32r 4005 #define ELF_TARGET_ID M32R_ELF_DATA 4006 #define ELF_MACHINE_CODE EM_M32R 4007 #define ELF_MACHINE_ALT1 EM_CYGNUS_M32R 4008 #define ELF_MAXPAGESIZE 0x1 /* Explicitly requested by Mitsubishi. */ 4009 4010 #define TARGET_BIG_SYM m32r_elf32_vec 4011 #define TARGET_BIG_NAME "elf32-m32r" 4012 #define TARGET_LITTLE_SYM m32r_elf32_le_vec 4013 #define TARGET_LITTLE_NAME "elf32-m32rle" 4014 4015 #define elf_info_to_howto m32r_info_to_howto 4016 #define elf_info_to_howto_rel m32r_info_to_howto_rel 4017 #define elf_backend_section_from_bfd_section _bfd_m32r_elf_section_from_bfd_section 4018 #define elf_backend_symbol_processing _bfd_m32r_elf_symbol_processing 4019 #define elf_backend_add_symbol_hook m32r_elf_add_symbol_hook 4020 #define elf_backend_relocate_section m32r_elf_relocate_section 4021 #define elf_backend_gc_mark_hook m32r_elf_gc_mark_hook 4022 #define elf_backend_gc_sweep_hook m32r_elf_gc_sweep_hook 4023 #define elf_backend_check_relocs m32r_elf_check_relocs 4024 4025 #define elf_backend_create_dynamic_sections m32r_elf_create_dynamic_sections 4026 #define bfd_elf32_bfd_link_hash_table_create m32r_elf_link_hash_table_create 4027 #define elf_backend_size_dynamic_sections m32r_elf_size_dynamic_sections 4028 #define elf_backend_omit_section_dynsym \ 4029 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) 4030 #define elf_backend_finish_dynamic_sections m32r_elf_finish_dynamic_sections 4031 #define elf_backend_adjust_dynamic_symbol m32r_elf_adjust_dynamic_symbol 4032 #define elf_backend_finish_dynamic_symbol m32r_elf_finish_dynamic_symbol 4033 #define elf_backend_reloc_type_class m32r_elf_reloc_type_class 4034 #define elf_backend_copy_indirect_symbol m32r_elf_copy_indirect_symbol 4035 4036 #define elf_backend_can_gc_sections 1 4037 /*#if !USE_REL 4038 #define elf_backend_rela_normal 1 4039 #endif*/ 4040 #define elf_backend_can_refcount 1 4041 #define elf_backend_want_got_plt 1 4042 #define elf_backend_plt_readonly 1 4043 #define elf_backend_want_plt_sym 0 4044 #define elf_backend_got_header_size 12 4045 4046 #define elf_backend_may_use_rel_p 1 4047 #ifdef USE_M32R_OLD_RELOC 4048 #define elf_backend_default_use_rela_p 0 4049 #define elf_backend_may_use_rela_p 0 4050 #else 4051 #define elf_backend_default_use_rela_p 1 4052 #define elf_backend_may_use_rela_p 1 4053 #endif 4054 4055 #define elf_backend_object_p m32r_elf_object_p 4056 #define elf_backend_final_write_processing m32r_elf_final_write_processing 4057 #define bfd_elf32_bfd_merge_private_bfd_data m32r_elf_merge_private_bfd_data 4058 #define bfd_elf32_bfd_set_private_flags m32r_elf_set_private_flags 4059 #define bfd_elf32_bfd_print_private_bfd_data m32r_elf_print_private_bfd_data 4060 #define elf_backend_special_sections m32r_elf_special_sections 4061 4062 #include "elf32-target.h" 4063 4064 #undef ELF_MAXPAGESIZE 4065 #define ELF_MAXPAGESIZE 0x1000 4066 4067 #undef TARGET_BIG_SYM 4068 #define TARGET_BIG_SYM m32r_elf32_linux_vec 4069 #undef TARGET_BIG_NAME 4070 #define TARGET_BIG_NAME "elf32-m32r-linux" 4071 #undef TARGET_LITTLE_SYM 4072 #define TARGET_LITTLE_SYM m32r_elf32_linux_le_vec 4073 #undef TARGET_LITTLE_NAME 4074 #define TARGET_LITTLE_NAME "elf32-m32rle-linux" 4075 #undef elf32_bed 4076 #define elf32_bed elf32_m32r_lin_bed 4077 4078 #include "elf32-target.h" 4079 4080