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. 287 HI16_SLO is for the add3 and load/store with displacement instructions. 288 HI16_ULO is for the or3 instruction. 289 For R_M32R_HI16_SLO, the lower 16 bits are sign extended when added to 290 the high 16 bytes so if the lower 16 bits are negative (bit 15 == 1) then 291 we must add one to the high 16 bytes (which will get subtracted off when 292 the low 16 bits are added). 293 These relocs have to be done in combination with an R_M32R_LO16 reloc 294 because there is a carry from the LO16 to the HI16. Here we just save 295 the information we need; we do the actual relocation when we see the LO16. 296 This code is copied from the elf32-mips.c. We also support an arbitrary 297 number of HI16 relocs to be associated with a single LO16 reloc. The 298 assembler sorts the relocs to ensure each HI16 immediately precedes its 299 LO16. However if there are multiple copies, the assembler may not find 300 the real LO16 so it picks the first one it finds. */ 301 302 struct m32r_hi16 303 { 304 struct m32r_hi16 *next; 305 bfd_byte *addr; 306 bfd_vma addend; 307 }; 308 309 /* FIXME: This should not be a static variable. */ 310 311 static struct m32r_hi16 *m32r_hi16_list; 312 313 static bfd_reloc_status_type 314 m32r_elf_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED, 315 arelent *reloc_entry, 316 asymbol *symbol, 317 void * data, 318 asection *input_section, 319 bfd *output_bfd, 320 char **error_message ATTRIBUTE_UNUSED) 321 { 322 bfd_reloc_status_type ret; 323 bfd_vma relocation; 324 struct m32r_hi16 *n; 325 326 /* This part is from bfd_elf_generic_reloc. 327 If we're relocating, and this an external symbol, we don't want 328 to change anything. */ 329 if (output_bfd != NULL 330 && (symbol->flags & BSF_SECTION_SYM) == 0 331 && reloc_entry->addend == 0) 332 { 333 reloc_entry->address += input_section->output_offset; 334 return bfd_reloc_ok; 335 } 336 337 /* Sanity check the address (offset in section). */ 338 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 339 return bfd_reloc_outofrange; 340 341 ret = bfd_reloc_ok; 342 if (bfd_is_und_section (symbol->section) 343 && output_bfd == NULL) 344 ret = bfd_reloc_undefined; 345 346 if (bfd_is_com_section (symbol->section)) 347 relocation = 0; 348 else 349 relocation = symbol->value; 350 351 relocation += symbol->section->output_section->vma; 352 relocation += symbol->section->output_offset; 353 relocation += reloc_entry->addend; 354 355 /* Save the information, and let LO16 do the actual relocation. */ 356 n = bfd_malloc ((bfd_size_type) sizeof *n); 357 if (n == NULL) 358 return bfd_reloc_outofrange; 359 n->addr = (bfd_byte *) data + reloc_entry->address; 360 n->addend = relocation; 361 n->next = m32r_hi16_list; 362 m32r_hi16_list = n; 363 364 if (output_bfd != NULL) 365 reloc_entry->address += input_section->output_offset; 366 367 return ret; 368 } 369 370 /* Handle an M32R ELF HI16 reloc. */ 371 372 static void 373 m32r_elf_relocate_hi16 (bfd *input_bfd, 374 int type, 375 Elf_Internal_Rela *relhi, 376 Elf_Internal_Rela *rello, 377 bfd_byte *contents, 378 bfd_vma addend) 379 { 380 unsigned long insn; 381 bfd_vma addlo; 382 383 insn = bfd_get_32 (input_bfd, contents + relhi->r_offset); 384 385 addlo = bfd_get_32 (input_bfd, contents + rello->r_offset); 386 if (type == R_M32R_HI16_SLO) 387 addlo = ((addlo & 0xffff) ^ 0x8000) - 0x8000; 388 else 389 addlo &= 0xffff; 390 391 addend += ((insn & 0xffff) << 16) + addlo; 392 393 /* Reaccount for sign extension of low part. */ 394 if (type == R_M32R_HI16_SLO 395 && (addend & 0x8000) != 0) 396 addend += 0x10000; 397 398 bfd_put_32 (input_bfd, 399 (insn & 0xffff0000) | ((addend >> 16) & 0xffff), 400 contents + relhi->r_offset); 401 } 402 403 /* Do an R_M32R_LO16 relocation. This is a straightforward 16 bit 404 inplace relocation; this function exists in order to do the 405 R_M32R_HI16_[SU]LO relocation described above. */ 406 407 static bfd_reloc_status_type 408 m32r_elf_lo16_reloc (bfd *input_bfd, 409 arelent *reloc_entry, 410 asymbol *symbol, 411 void * data, 412 asection *input_section, 413 bfd *output_bfd, 414 char **error_message) 415 { 416 /* This part is from bfd_elf_generic_reloc. 417 If we're relocating, and this an external symbol, we don't want 418 to change anything. */ 419 if (output_bfd != NULL 420 && (symbol->flags & BSF_SECTION_SYM) == 0 421 && reloc_entry->addend == 0) 422 { 423 reloc_entry->address += input_section->output_offset; 424 return bfd_reloc_ok; 425 } 426 427 if (m32r_hi16_list != NULL) 428 { 429 struct m32r_hi16 *l; 430 431 l = m32r_hi16_list; 432 while (l != NULL) 433 { 434 unsigned long insn; 435 unsigned long val; 436 unsigned long vallo; 437 struct m32r_hi16 *next; 438 439 /* Do the HI16 relocation. Note that we actually don't need 440 to know anything about the LO16 itself, except where to 441 find the low 16 bits of the addend needed by the LO16. */ 442 insn = bfd_get_32 (input_bfd, l->addr); 443 vallo = ((bfd_get_32 (input_bfd, (bfd_byte *) data + reloc_entry->address) 444 & 0xffff) ^ 0x8000) - 0x8000; 445 val = ((insn & 0xffff) << 16) + vallo; 446 val += l->addend; 447 448 /* Reaccount for sign extension of low part. */ 449 if ((val & 0x8000) != 0) 450 val += 0x10000; 451 452 insn = (insn &~ (bfd_vma) 0xffff) | ((val >> 16) & 0xffff); 453 bfd_put_32 (input_bfd, (bfd_vma) insn, l->addr); 454 455 next = l->next; 456 free (l); 457 l = next; 458 } 459 460 m32r_hi16_list = NULL; 461 } 462 463 /* Now do the LO16 reloc in the usual way. 464 ??? It would be nice to call bfd_elf_generic_reloc here, 465 but we have partial_inplace set. bfd_elf_generic_reloc will 466 pass the handling back to bfd_install_relocation which will install 467 a section relative addend which is wrong. */ 468 return m32r_elf_generic_reloc (input_bfd, reloc_entry, symbol, data, 469 input_section, output_bfd, error_message); 470 } 471 472 473 static reloc_howto_type m32r_elf_howto_table[] = 475 { 476 /* This reloc does nothing. */ 477 HOWTO (R_M32R_NONE, /* type */ 478 0, /* rightshift */ 479 3, /* size (0 = byte, 1 = short, 2 = long) */ 480 0, /* bitsize */ 481 FALSE, /* pc_relative */ 482 0, /* bitpos */ 483 complain_overflow_dont, /* complain_on_overflow */ 484 bfd_elf_generic_reloc, /* special_function */ 485 "R_M32R_NONE", /* name */ 486 FALSE, /* partial_inplace */ 487 0, /* src_mask */ 488 0, /* dst_mask */ 489 FALSE), /* pcrel_offset */ 490 491 /* A 16 bit absolute relocation. */ 492 HOWTO (R_M32R_16, /* type */ 493 0, /* rightshift */ 494 1, /* size (0 = byte, 1 = short, 2 = long) */ 495 16, /* bitsize */ 496 FALSE, /* pc_relative */ 497 0, /* bitpos */ 498 complain_overflow_bitfield, /* complain_on_overflow */ 499 m32r_elf_generic_reloc,/* special_function */ 500 "R_M32R_16", /* name */ 501 TRUE, /* partial_inplace */ 502 0xffff, /* src_mask */ 503 0xffff, /* dst_mask */ 504 FALSE), /* pcrel_offset */ 505 506 /* A 32 bit absolute relocation. */ 507 HOWTO (R_M32R_32, /* type */ 508 0, /* rightshift */ 509 2, /* size (0 = byte, 1 = short, 2 = long) */ 510 32, /* bitsize */ 511 FALSE, /* pc_relative */ 512 0, /* bitpos */ 513 complain_overflow_bitfield, /* complain_on_overflow */ 514 m32r_elf_generic_reloc,/* special_function */ 515 "R_M32R_32", /* name */ 516 TRUE, /* partial_inplace */ 517 0xffffffff, /* src_mask */ 518 0xffffffff, /* dst_mask */ 519 FALSE), /* pcrel_offset */ 520 521 /* A 24 bit address. */ 522 HOWTO (R_M32R_24, /* type */ 523 0, /* rightshift */ 524 2, /* size (0 = byte, 1 = short, 2 = long) */ 525 24, /* bitsize */ 526 FALSE, /* pc_relative */ 527 0, /* bitpos */ 528 complain_overflow_unsigned, /* complain_on_overflow */ 529 m32r_elf_generic_reloc,/* special_function */ 530 "R_M32R_24", /* name */ 531 TRUE, /* partial_inplace */ 532 0xffffff, /* src_mask */ 533 0xffffff, /* dst_mask */ 534 FALSE), /* pcrel_offset */ 535 536 /* An PC Relative 10-bit relocation, shifted by 2. 537 This reloc is complicated because relocations are relative to pc & -4. 538 i.e. branches in the right insn slot use the address of the left insn 539 slot for pc. */ 540 /* ??? It's not clear whether this should have partial_inplace set or not. 541 Branch relaxing in the assembler can store the addend in the insn, 542 and if bfd_install_relocation gets called the addend may get added 543 again. */ 544 HOWTO (R_M32R_10_PCREL, /* type */ 545 2, /* rightshift */ 546 1, /* size (0 = byte, 1 = short, 2 = long) */ 547 10, /* bitsize */ 548 TRUE, /* pc_relative */ 549 0, /* bitpos */ 550 complain_overflow_signed, /* complain_on_overflow */ 551 m32r_elf_10_pcrel_reloc, /* special_function */ 552 "R_M32R_10_PCREL", /* name */ 553 FALSE, /* partial_inplace */ 554 0xff, /* src_mask */ 555 0xff, /* dst_mask */ 556 TRUE), /* pcrel_offset */ 557 558 /* A relative 18 bit relocation, right shifted by 2. */ 559 HOWTO (R_M32R_18_PCREL, /* type */ 560 2, /* rightshift */ 561 2, /* size (0 = byte, 1 = short, 2 = long) */ 562 16, /* bitsize */ 563 TRUE, /* pc_relative */ 564 0, /* bitpos */ 565 complain_overflow_signed, /* complain_on_overflow */ 566 bfd_elf_generic_reloc, /* special_function */ 567 "R_M32R_18_PCREL", /* name */ 568 FALSE, /* partial_inplace */ 569 0xffff, /* src_mask */ 570 0xffff, /* dst_mask */ 571 TRUE), /* pcrel_offset */ 572 573 /* A relative 26 bit relocation, right shifted by 2. */ 574 /* ??? It's not clear whether this should have partial_inplace set or not. 575 Branch relaxing in the assembler can store the addend in the insn, 576 and if bfd_install_relocation gets called the addend may get added 577 again. */ 578 HOWTO (R_M32R_26_PCREL, /* type */ 579 2, /* rightshift */ 580 2, /* size (0 = byte, 1 = short, 2 = long) */ 581 26, /* bitsize */ 582 TRUE, /* pc_relative */ 583 0, /* bitpos */ 584 complain_overflow_signed, /* complain_on_overflow */ 585 bfd_elf_generic_reloc, /* special_function */ 586 "R_M32R_26_PCREL", /* name */ 587 FALSE, /* partial_inplace */ 588 0xffffff, /* src_mask */ 589 0xffffff, /* dst_mask */ 590 TRUE), /* pcrel_offset */ 591 592 /* High 16 bits of address when lower 16 is or'd in. */ 593 HOWTO (R_M32R_HI16_ULO, /* type */ 594 16, /* rightshift */ 595 2, /* size (0 = byte, 1 = short, 2 = long) */ 596 16, /* bitsize */ 597 FALSE, /* pc_relative */ 598 0, /* bitpos */ 599 complain_overflow_dont, /* complain_on_overflow */ 600 m32r_elf_hi16_reloc, /* special_function */ 601 "R_M32R_HI16_ULO", /* name */ 602 TRUE, /* partial_inplace */ 603 0x0000ffff, /* src_mask */ 604 0x0000ffff, /* dst_mask */ 605 FALSE), /* pcrel_offset */ 606 607 /* High 16 bits of address when lower 16 is added in. */ 608 HOWTO (R_M32R_HI16_SLO, /* type */ 609 16, /* rightshift */ 610 2, /* size (0 = byte, 1 = short, 2 = long) */ 611 16, /* bitsize */ 612 FALSE, /* pc_relative */ 613 0, /* bitpos */ 614 complain_overflow_dont, /* complain_on_overflow */ 615 m32r_elf_hi16_reloc, /* special_function */ 616 "R_M32R_HI16_SLO", /* name */ 617 TRUE, /* partial_inplace */ 618 0x0000ffff, /* src_mask */ 619 0x0000ffff, /* dst_mask */ 620 FALSE), /* pcrel_offset */ 621 622 /* Lower 16 bits of address. */ 623 HOWTO (R_M32R_LO16, /* type */ 624 0, /* rightshift */ 625 2, /* size (0 = byte, 1 = short, 2 = long) */ 626 16, /* bitsize */ 627 FALSE, /* pc_relative */ 628 0, /* bitpos */ 629 complain_overflow_dont, /* complain_on_overflow */ 630 m32r_elf_lo16_reloc, /* special_function */ 631 "R_M32R_LO16", /* name */ 632 TRUE, /* partial_inplace */ 633 0x0000ffff, /* src_mask */ 634 0x0000ffff, /* dst_mask */ 635 FALSE), /* pcrel_offset */ 636 637 /* Small data area 16 bits offset. */ 638 HOWTO (R_M32R_SDA16, /* type */ 639 0, /* rightshift */ 640 2, /* size (0 = byte, 1 = short, 2 = long) */ 641 16, /* bitsize */ 642 FALSE, /* pc_relative */ 643 0, /* bitpos */ 644 complain_overflow_signed, /* complain_on_overflow */ 645 m32r_elf_sda16_reloc, /* special_function */ 646 "R_M32R_SDA16", /* name */ 647 TRUE, /* partial_inplace */ /* FIXME: correct? */ 648 0x0000ffff, /* src_mask */ 649 0x0000ffff, /* dst_mask */ 650 FALSE), /* pcrel_offset */ 651 652 /* GNU extension to record C++ vtable hierarchy. */ 653 HOWTO (R_M32R_GNU_VTINHERIT, /* type */ 654 0, /* rightshift */ 655 2, /* size (0 = byte, 1 = short, 2 = long) */ 656 0, /* bitsize */ 657 FALSE, /* pc_relative */ 658 0, /* bitpos */ 659 complain_overflow_dont, /* complain_on_overflow */ 660 NULL, /* special_function */ 661 "R_M32R_GNU_VTINHERIT", /* name */ 662 FALSE, /* partial_inplace */ 663 0, /* src_mask */ 664 0, /* dst_mask */ 665 FALSE), /* pcrel_offset */ 666 667 /* GNU extension to record C++ vtable member usage. */ 668 HOWTO (R_M32R_GNU_VTENTRY, /* type */ 669 0, /* rightshift */ 670 2, /* size (0 = byte, 1 = short, 2 = long) */ 671 0, /* bitsize */ 672 FALSE, /* pc_relative */ 673 0, /* bitpos */ 674 complain_overflow_dont, /* complain_on_overflow */ 675 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 676 "R_M32R_GNU_VTENTRY", /* name */ 677 FALSE, /* partial_inplace */ 678 0, /* src_mask */ 679 0, /* dst_mask */ 680 FALSE), /* pcrel_offset */ 681 682 EMPTY_HOWTO (13), 683 EMPTY_HOWTO (14), 684 EMPTY_HOWTO (15), 685 EMPTY_HOWTO (16), 686 EMPTY_HOWTO (17), 687 EMPTY_HOWTO (18), 688 EMPTY_HOWTO (19), 689 EMPTY_HOWTO (20), 690 EMPTY_HOWTO (21), 691 EMPTY_HOWTO (22), 692 EMPTY_HOWTO (23), 693 EMPTY_HOWTO (24), 694 EMPTY_HOWTO (25), 695 EMPTY_HOWTO (26), 696 EMPTY_HOWTO (27), 697 EMPTY_HOWTO (28), 698 EMPTY_HOWTO (29), 699 EMPTY_HOWTO (30), 700 EMPTY_HOWTO (31), 701 EMPTY_HOWTO (32), 702 703 /* A 16 bit absolute relocation. */ 704 HOWTO (R_M32R_16_RELA, /* type */ 705 0, /* rightshift */ 706 1, /* size (0 = byte, 1 = short, 2 = long) */ 707 16, /* bitsize */ 708 FALSE, /* pc_relative */ 709 0, /* bitpos */ 710 complain_overflow_bitfield, /* complain_on_overflow */ 711 bfd_elf_generic_reloc, /* special_function */ 712 "R_M32R_16_RELA", /* name */ 713 FALSE, /* partial_inplace */ 714 0xffff, /* src_mask */ 715 0xffff, /* dst_mask */ 716 FALSE), /* pcrel_offset */ 717 718 /* A 32 bit absolute relocation. */ 719 HOWTO (R_M32R_32_RELA, /* type */ 720 0, /* rightshift */ 721 2, /* size (0 = byte, 1 = short, 2 = long) */ 722 32, /* bitsize */ 723 FALSE, /* pc_relative */ 724 0, /* bitpos */ 725 complain_overflow_bitfield, /* complain_on_overflow */ 726 bfd_elf_generic_reloc,/* special_function */ 727 "R_M32R_32_RELA", /* name */ 728 FALSE, /* partial_inplace */ 729 0xffffffff, /* src_mask */ 730 0xffffffff, /* dst_mask */ 731 FALSE), /* pcrel_offset */ 732 733 /* A 24 bit address. */ 734 HOWTO (R_M32R_24_RELA, /* type */ 735 0, /* rightshift */ 736 2, /* size (0 = byte, 1 = short, 2 = long) */ 737 24, /* bitsize */ 738 FALSE, /* pc_relative */ 739 0, /* bitpos */ 740 complain_overflow_unsigned, /* complain_on_overflow */ 741 bfd_elf_generic_reloc,/* special_function */ 742 "R_M32R_24_RELA", /* name */ 743 FALSE, /* partial_inplace */ 744 0xffffff, /* src_mask */ 745 0xffffff, /* dst_mask */ 746 FALSE), /* pcrel_offset */ 747 748 HOWTO (R_M32R_10_PCREL_RELA, /* type */ 749 2, /* rightshift */ 750 1, /* size (0 = byte, 1 = short, 2 = long) */ 751 10, /* bitsize */ 752 TRUE, /* pc_relative */ 753 0, /* bitpos */ 754 complain_overflow_signed, /* complain_on_overflow */ 755 m32r_elf_10_pcrel_reloc, /* special_function */ 756 "R_M32R_10_PCREL_RELA",/* name */ 757 FALSE, /* partial_inplace */ 758 0xff, /* src_mask */ 759 0xff, /* dst_mask */ 760 TRUE), /* pcrel_offset */ 761 762 /* A relative 18 bit relocation, right shifted by 2. */ 763 HOWTO (R_M32R_18_PCREL_RELA, /* type */ 764 2, /* rightshift */ 765 2, /* size (0 = byte, 1 = short, 2 = long) */ 766 16, /* bitsize */ 767 TRUE, /* pc_relative */ 768 0, /* bitpos */ 769 complain_overflow_signed, /* complain_on_overflow */ 770 bfd_elf_generic_reloc, /* special_function */ 771 "R_M32R_18_PCREL_RELA",/* name */ 772 FALSE, /* partial_inplace */ 773 0xffff, /* src_mask */ 774 0xffff, /* dst_mask */ 775 TRUE), /* pcrel_offset */ 776 777 /* A relative 26 bit relocation, right shifted by 2. */ 778 HOWTO (R_M32R_26_PCREL_RELA, /* type */ 779 2, /* rightshift */ 780 2, /* size (0 = byte, 1 = short, 2 = long) */ 781 26, /* bitsize */ 782 TRUE, /* pc_relative */ 783 0, /* bitpos */ 784 complain_overflow_signed, /* complain_on_overflow */ 785 bfd_elf_generic_reloc, /* special_function */ 786 "R_M32R_26_PCREL_RELA",/* name */ 787 FALSE, /* partial_inplace */ 788 0xffffff, /* src_mask */ 789 0xffffff, /* dst_mask */ 790 TRUE), /* pcrel_offset */ 791 792 /* High 16 bits of address when lower 16 is or'd in. */ 793 HOWTO (R_M32R_HI16_ULO_RELA, /* type */ 794 16, /* rightshift */ 795 2, /* size (0 = byte, 1 = short, 2 = long) */ 796 16, /* bitsize */ 797 FALSE, /* pc_relative */ 798 0, /* bitpos */ 799 complain_overflow_dont, /* complain_on_overflow */ 800 bfd_elf_generic_reloc, /* special_function */ 801 "R_M32R_HI16_ULO_RELA",/* name */ 802 FALSE, /* partial_inplace */ 803 0x0000ffff, /* src_mask */ 804 0x0000ffff, /* dst_mask */ 805 FALSE), /* pcrel_offset */ 806 807 /* High 16 bits of address when lower 16 is added in. */ 808 HOWTO (R_M32R_HI16_SLO_RELA, /* type */ 809 16, /* rightshift */ 810 2, /* size (0 = byte, 1 = short, 2 = long) */ 811 16, /* bitsize */ 812 FALSE, /* pc_relative */ 813 0, /* bitpos */ 814 complain_overflow_dont, /* complain_on_overflow */ 815 bfd_elf_generic_reloc, /* special_function */ 816 "R_M32R_HI16_SLO_RELA",/* name */ 817 FALSE, /* partial_inplace */ 818 0x0000ffff, /* src_mask */ 819 0x0000ffff, /* dst_mask */ 820 FALSE), /* pcrel_offset */ 821 822 /* Lower 16 bits of address. */ 823 HOWTO (R_M32R_LO16_RELA, /* type */ 824 0, /* rightshift */ 825 2, /* size (0 = byte, 1 = short, 2 = long) */ 826 16, /* bitsize */ 827 FALSE, /* pc_relative */ 828 0, /* bitpos */ 829 complain_overflow_dont, /* complain_on_overflow */ 830 bfd_elf_generic_reloc, /* special_function */ 831 "R_M32R_LO16_RELA", /* name */ 832 FALSE, /* partial_inplace */ 833 0x0000ffff, /* src_mask */ 834 0x0000ffff, /* dst_mask */ 835 FALSE), /* pcrel_offset */ 836 837 /* Small data area 16 bits offset. */ 838 HOWTO (R_M32R_SDA16_RELA, /* type */ 839 0, /* rightshift */ 840 2, /* size (0 = byte, 1 = short, 2 = long) */ 841 16, /* bitsize */ 842 FALSE, /* pc_relative */ 843 0, /* bitpos */ 844 complain_overflow_signed, /* complain_on_overflow */ 845 bfd_elf_generic_reloc, /* special_function */ 846 "R_M32R_SDA16_RELA", /* name */ 847 TRUE, /* partial_inplace */ /* FIXME: correct? */ 848 0x0000ffff, /* src_mask */ 849 0x0000ffff, /* dst_mask */ 850 FALSE), /* pcrel_offset */ 851 852 /* GNU extension to record C++ vtable hierarchy. */ 853 HOWTO (R_M32R_RELA_GNU_VTINHERIT, /* type */ 854 0, /* rightshift */ 855 2, /* size (0 = byte, 1 = short, 2 = long) */ 856 0, /* bitsize */ 857 FALSE, /* pc_relative */ 858 0, /* bitpos */ 859 complain_overflow_dont, /* complain_on_overflow */ 860 NULL, /* special_function */ 861 "R_M32R_RELA_GNU_VTINHERIT", /* name */ 862 FALSE, /* partial_inplace */ 863 0, /* src_mask */ 864 0, /* dst_mask */ 865 FALSE), /* pcrel_offset */ 866 867 /* GNU extension to record C++ vtable member usage. */ 868 HOWTO (R_M32R_RELA_GNU_VTENTRY, /* type */ 869 0, /* rightshift */ 870 2, /* size (0 = byte, 1 = short, 2 = long) */ 871 0, /* bitsize */ 872 FALSE, /* pc_relative */ 873 0, /* bitpos */ 874 complain_overflow_dont, /* complain_on_overflow */ 875 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 876 "R_M32R_RELA_GNU_VTENTRY", /* name */ 877 FALSE, /* partial_inplace */ 878 0, /* src_mask */ 879 0, /* dst_mask */ 880 FALSE), /* pcrel_offset */ 881 882 /* A 32 bit PC relative relocation. */ 883 HOWTO (R_M32R_REL32, /* type */ 884 0, /* rightshift */ 885 2, /* size (0 = byte, 1 = short, 2 = long) */ 886 32, /* bitsize */ 887 TRUE, /* pc_relative */ 888 0, /* bitpos */ 889 complain_overflow_bitfield, /* complain_on_overflow */ 890 bfd_elf_generic_reloc,/* special_function */ 891 "R_M32R_REL32", /* name */ 892 FALSE, /* partial_inplace */ 893 0xffffffff, /* src_mask */ 894 0xffffffff, /* dst_mask */ 895 TRUE), /* pcrel_offset */ 896 897 EMPTY_HOWTO (46), 898 EMPTY_HOWTO (47), 899 900 /* Like R_M32R_24, but referring to the GOT table entry for 901 the symbol. */ 902 HOWTO (R_M32R_GOT24, /* type */ 903 0, /* rightshift */ 904 2, /* size (0 = byte, 1 = short, 2 = long) */ 905 24, /* bitsize */ 906 FALSE, /* pc_relative */ 907 0, /* bitpos */ 908 complain_overflow_unsigned, /* complain_on_overflow */ 909 bfd_elf_generic_reloc, /* special_function */ 910 "R_M32R_GOT24", /* name */ 911 FALSE, /* partial_inplace */ 912 0xffffff, /* src_mask */ 913 0xffffff, /* dst_mask */ 914 FALSE), /* pcrel_offset */ 915 916 /* Like R_M32R_PCREL, but referring to the procedure linkage table 917 entry for the symbol. */ 918 HOWTO (R_M32R_26_PLTREL, /* type */ 919 2, /* rightshift */ 920 2, /* size (0 = byte, 1 = short, 2 = long) */ 921 24, /* bitsize */ 922 TRUE, /* pc_relative */ 923 0, /* bitpos */ 924 complain_overflow_signed, /* complain_on_overflow */ 925 bfd_elf_generic_reloc, /* special_function */ 926 "R_M32R_26_PLTREL", /* name */ 927 FALSE, /* partial_inplace */ 928 0xffffff, /* src_mask */ 929 0xffffff, /* dst_mask */ 930 TRUE), /* pcrel_offset */ 931 932 /* This is used only by the dynamic linker. The symbol should exist 933 both in the object being run and in some shared library. The 934 dynamic linker copies the data addressed by the symbol from the 935 shared library into the object, because the object being 936 run has to have the data at some particular address. */ 937 HOWTO (R_M32R_COPY, /* type */ 938 0, /* rightshift */ 939 2, /* size (0 = byte, 1 = short, 2 = long) */ 940 32, /* bitsize */ 941 FALSE, /* pc_relative */ 942 0, /* bitpos */ 943 complain_overflow_bitfield, /* complain_on_overflow */ 944 bfd_elf_generic_reloc, /* special_function */ 945 "R_M32R_COPY", /* name */ 946 FALSE, /* partial_inplace */ 947 0xffffffff, /* src_mask */ 948 0xffffffff, /* dst_mask */ 949 FALSE), /* pcrel_offset */ 950 951 /* Like R_M32R_24, but used when setting global offset table 952 entries. */ 953 HOWTO (R_M32R_GLOB_DAT, /* type */ 954 0, /* rightshift */ 955 2, /* size (0 = byte, 1 = short, 2 = long) */ 956 32, /* bitsize */ 957 FALSE, /* pc_relative */ 958 0, /* bitpos */ 959 complain_overflow_bitfield, /* complain_on_overflow */ 960 bfd_elf_generic_reloc, /* special_function */ 961 "R_M32R_GLOB_DAT", /* name */ 962 FALSE, /* partial_inplace */ 963 0xffffffff, /* src_mask */ 964 0xffffffff, /* dst_mask */ 965 FALSE), /* pcrel_offset */ 966 967 /* Marks a procedure linkage table entry for a symbol. */ 968 HOWTO (R_M32R_JMP_SLOT, /* type */ 969 0, /* rightshift */ 970 2, /* size (0 = byte, 1 = short, 2 = long) */ 971 32, /* bitsize */ 972 FALSE, /* pc_relative */ 973 0, /* bitpos */ 974 complain_overflow_bitfield, /* complain_on_overflow */ 975 bfd_elf_generic_reloc, /* special_function */ 976 "R_M32R_JMP_SLOT", /* name */ 977 FALSE, /* partial_inplace */ 978 0xffffffff, /* src_mask */ 979 0xffffffff, /* dst_mask */ 980 FALSE), /* pcrel_offset */ 981 982 /* Used only by the dynamic linker. When the object is run, this 983 longword is set to the load address of the object, plus the 984 addend. */ 985 HOWTO (R_M32R_RELATIVE, /* type */ 986 0, /* rightshift */ 987 2, /* size (0 = byte, 1 = short, 2 = long) */ 988 32, /* bitsize */ 989 FALSE, /* pc_relative */ 990 0, /* bitpos */ 991 complain_overflow_bitfield, /* complain_on_overflow */ 992 bfd_elf_generic_reloc, /* special_function */ 993 "R_M32R_RELATIVE", /* name */ 994 FALSE, /* partial_inplace */ 995 0xffffffff, /* src_mask */ 996 0xffffffff, /* dst_mask */ 997 FALSE), /* pcrel_offset */ 998 999 HOWTO (R_M32R_GOTOFF, /* type */ 1000 0, /* rightshift */ 1001 2, /* size (0 = byte, 1 = short, 2 = long) */ 1002 24, /* bitsize */ 1003 FALSE, /* pc_relative */ 1004 0, /* bitpos */ 1005 complain_overflow_bitfield, /* complain_on_overflow */ 1006 bfd_elf_generic_reloc, /* special_function */ 1007 "R_M32R_GOTOFF", /* name */ 1008 FALSE, /* partial_inplace */ 1009 0xffffff, /* src_mask */ 1010 0xffffff, /* dst_mask */ 1011 FALSE), /* pcrel_offset */ 1012 1013 /* An PC Relative 24-bit relocation used when setting PIC offset 1014 table register. */ 1015 HOWTO (R_M32R_GOTPC24, /* type */ 1016 0, /* rightshift */ 1017 2, /* size (0 = byte, 1 = short, 2 = long) */ 1018 24, /* bitsize */ 1019 TRUE, /* pc_relative */ 1020 0, /* bitpos */ 1021 complain_overflow_unsigned, /* complain_on_overflow */ 1022 bfd_elf_generic_reloc, /* special_function */ 1023 "R_M32R_GOTPC24", /* name */ 1024 FALSE, /* partial_inplace */ 1025 0xffffff, /* src_mask */ 1026 0xffffff, /* dst_mask */ 1027 TRUE), /* pcrel_offset */ 1028 1029 /* Like R_M32R_HI16_ULO, but referring to the GOT table entry for 1030 the symbol. */ 1031 HOWTO (R_M32R_GOT16_HI_ULO, /* type */ 1032 16, /* rightshift */ 1033 2, /* size (0 = byte, 1 = short, 2 = long) */ 1034 16, /* bitsize */ 1035 FALSE, /* pc_relative */ 1036 0, /* bitpos */ 1037 complain_overflow_dont, /* complain_on_overflow */ 1038 bfd_elf_generic_reloc, /* special_function */ 1039 "R_M32R_GOT16_HI_ULO", /* name */ 1040 FALSE, /* partial_inplace */ 1041 0x0000ffff, /* src_mask */ 1042 0x0000ffff, /* dst_mask */ 1043 FALSE), /* pcrel_offset */ 1044 1045 /* Like R_M32R_HI16_SLO, but referring to the GOT table entry for 1046 the symbol. */ 1047 HOWTO (R_M32R_GOT16_HI_SLO, /* type */ 1048 16, /* rightshift */ 1049 2, /* size (0 = byte, 1 = short, 2 = long) */ 1050 16, /* bitsize */ 1051 FALSE, /* pc_relative */ 1052 0, /* bitpos */ 1053 complain_overflow_dont, /* complain_on_overflow */ 1054 bfd_elf_generic_reloc, /* special_function */ 1055 "R_M32R_GOT16_HI_SLO", /* name */ 1056 FALSE, /* partial_inplace */ 1057 0x0000ffff, /* src_mask */ 1058 0x0000ffff, /* dst_mask */ 1059 FALSE), /* pcrel_offset */ 1060 1061 /* Like R_M32R_LO16, but referring to the GOT table entry for 1062 the symbol. */ 1063 HOWTO (R_M32R_GOT16_LO, /* type */ 1064 0, /* rightshift */ 1065 2, /* size (0 = byte, 1 = short, 2 = long) */ 1066 16, /* bitsize */ 1067 FALSE, /* pc_relative */ 1068 0, /* bitpos */ 1069 complain_overflow_dont, /* complain_on_overflow */ 1070 bfd_elf_generic_reloc, /* special_function */ 1071 "R_M32R_GOT16_LO", /* name */ 1072 FALSE, /* partial_inplace */ 1073 0x0000ffff, /* src_mask */ 1074 0x0000ffff, /* dst_mask */ 1075 FALSE), /* pcrel_offset */ 1076 1077 /* An PC Relative relocation used when setting PIC offset table register. 1078 Like R_M32R_HI16_ULO, but referring to the GOT table entry for 1079 the symbol. */ 1080 HOWTO (R_M32R_GOTPC_HI_ULO, /* type */ 1081 16, /* rightshift */ 1082 2, /* size (0 = byte, 1 = short, 2 = long) */ 1083 16, /* bitsize */ 1084 FALSE, /* pc_relative */ 1085 0, /* bitpos */ 1086 complain_overflow_dont, /* complain_on_overflow */ 1087 bfd_elf_generic_reloc, /* special_function */ 1088 "R_M32R_GOTPC_HI_ULO", /* name */ 1089 FALSE, /* partial_inplace */ 1090 0x0000ffff, /* src_mask */ 1091 0x0000ffff, /* dst_mask */ 1092 TRUE), /* pcrel_offset */ 1093 1094 /* An PC Relative relocation used when setting PIC offset table register. 1095 Like R_M32R_HI16_SLO, but referring to the GOT table entry for 1096 the symbol. */ 1097 HOWTO (R_M32R_GOTPC_HI_SLO, /* type */ 1098 16, /* rightshift */ 1099 2, /* size (0 = byte, 1 = short, 2 = long) */ 1100 16, /* bitsize */ 1101 FALSE, /* pc_relative */ 1102 0, /* bitpos */ 1103 complain_overflow_dont, /* complain_on_overflow */ 1104 bfd_elf_generic_reloc, /* special_function */ 1105 "R_M32R_GOTPC_HI_SLO", /* name */ 1106 FALSE, /* partial_inplace */ 1107 0x0000ffff, /* src_mask */ 1108 0x0000ffff, /* dst_mask */ 1109 TRUE), /* pcrel_offset */ 1110 1111 /* An PC Relative relocation used when setting PIC offset table register. 1112 Like R_M32R_LO16, but referring to the GOT table entry for 1113 the symbol. */ 1114 HOWTO (R_M32R_GOTPC_LO, /* type */ 1115 0, /* rightshift */ 1116 2, /* size (0 = byte, 1 = short, 2 = long) */ 1117 16, /* bitsize */ 1118 FALSE, /* pc_relative */ 1119 0, /* bitpos */ 1120 complain_overflow_dont, /* complain_on_overflow */ 1121 bfd_elf_generic_reloc, /* special_function */ 1122 "R_M32R_GOTPC_LO", /* name */ 1123 FALSE, /* partial_inplace */ 1124 0x0000ffff, /* src_mask */ 1125 0x0000ffff, /* dst_mask */ 1126 TRUE), /* pcrel_offset */ 1127 1128 HOWTO (R_M32R_GOTOFF_HI_ULO, /* type */ 1129 16, /* rightshift */ 1130 2, /* size (0 = byte, 1 = short, 2 = long) */ 1131 16, /* bitsize */ 1132 FALSE, /* pc_relative */ 1133 0, /* bitpos */ 1134 complain_overflow_dont, /* complain_on_overflow */ 1135 bfd_elf_generic_reloc, /* special_function */ 1136 "R_M32R_GOTOFF_HI_ULO",/* name */ 1137 FALSE, /* partial_inplace */ 1138 0x0000ffff, /* src_mask */ 1139 0x0000ffff, /* dst_mask */ 1140 FALSE), /* pcrel_offset */ 1141 1142 HOWTO (R_M32R_GOTOFF_HI_SLO, /* type */ 1143 16, /* rightshift */ 1144 2, /* size (0 = byte, 1 = short, 2 = long) */ 1145 16, /* bitsize */ 1146 FALSE, /* pc_relative */ 1147 0, /* bitpos */ 1148 complain_overflow_dont, /* complain_on_overflow */ 1149 bfd_elf_generic_reloc, /* special_function */ 1150 "R_M32R_GOTOFF_HI_SLO",/* name */ 1151 FALSE, /* partial_inplace */ 1152 0x0000ffff, /* src_mask */ 1153 0x0000ffff, /* dst_mask */ 1154 FALSE), /* pcrel_offset */ 1155 1156 HOWTO (R_M32R_GOTOFF_LO, /* type */ 1157 0, /* rightshift */ 1158 2, /* size (0 = byte, 1 = short, 2 = long) */ 1159 16, /* bitsize */ 1160 FALSE, /* pc_relative */ 1161 0, /* bitpos */ 1162 complain_overflow_dont, /* complain_on_overflow */ 1163 bfd_elf_generic_reloc, /* special_function */ 1164 "R_M32R_GOTOFF_LO", /* name */ 1165 FALSE, /* partial_inplace */ 1166 0x0000ffff, /* src_mask */ 1167 0x0000ffff, /* dst_mask */ 1168 FALSE), /* pcrel_offset */ 1169 }; 1170 1171 /* Map BFD reloc types to M32R ELF reloc types. */ 1172 1173 struct m32r_reloc_map 1174 { 1175 bfd_reloc_code_real_type bfd_reloc_val; 1176 unsigned char elf_reloc_val; 1177 }; 1178 1179 #ifdef USE_M32R_OLD_RELOC 1180 static const struct m32r_reloc_map m32r_reloc_map_old[] = 1181 { 1182 { BFD_RELOC_NONE, R_M32R_NONE }, 1183 { BFD_RELOC_16, R_M32R_16 }, 1184 { BFD_RELOC_32, R_M32R_32 }, 1185 { BFD_RELOC_M32R_24, R_M32R_24 }, 1186 { BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL }, 1187 { BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL }, 1188 { BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL }, 1189 { BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO }, 1190 { BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO }, 1191 { BFD_RELOC_M32R_LO16, R_M32R_LO16 }, 1192 { BFD_RELOC_M32R_SDA16, R_M32R_SDA16 }, 1193 { BFD_RELOC_VTABLE_INHERIT, R_M32R_GNU_VTINHERIT }, 1194 { BFD_RELOC_VTABLE_ENTRY, R_M32R_GNU_VTENTRY }, 1195 }; 1196 #else 1197 static const struct m32r_reloc_map m32r_reloc_map[] = 1198 { 1199 { BFD_RELOC_NONE, R_M32R_NONE }, 1200 { BFD_RELOC_16, R_M32R_16_RELA }, 1201 { BFD_RELOC_32, R_M32R_32_RELA }, 1202 { BFD_RELOC_M32R_24, R_M32R_24_RELA }, 1203 { BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL_RELA }, 1204 { BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL_RELA }, 1205 { BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL_RELA }, 1206 { BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO_RELA }, 1207 { BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO_RELA }, 1208 { BFD_RELOC_M32R_LO16, R_M32R_LO16_RELA }, 1209 { BFD_RELOC_M32R_SDA16, R_M32R_SDA16_RELA }, 1210 { BFD_RELOC_VTABLE_INHERIT, R_M32R_RELA_GNU_VTINHERIT }, 1211 { BFD_RELOC_VTABLE_ENTRY, R_M32R_RELA_GNU_VTENTRY }, 1212 { BFD_RELOC_32_PCREL, R_M32R_REL32 }, 1213 1214 { BFD_RELOC_M32R_GOT24, R_M32R_GOT24 }, 1215 { BFD_RELOC_M32R_26_PLTREL, R_M32R_26_PLTREL }, 1216 { BFD_RELOC_M32R_COPY, R_M32R_COPY }, 1217 { BFD_RELOC_M32R_GLOB_DAT, R_M32R_GLOB_DAT }, 1218 { BFD_RELOC_M32R_JMP_SLOT, R_M32R_JMP_SLOT }, 1219 { BFD_RELOC_M32R_RELATIVE, R_M32R_RELATIVE }, 1220 { BFD_RELOC_M32R_GOTOFF, R_M32R_GOTOFF }, 1221 { BFD_RELOC_M32R_GOTPC24, R_M32R_GOTPC24 }, 1222 { BFD_RELOC_M32R_GOT16_HI_ULO, R_M32R_GOT16_HI_ULO }, 1223 { BFD_RELOC_M32R_GOT16_HI_SLO, R_M32R_GOT16_HI_SLO }, 1224 { BFD_RELOC_M32R_GOT16_LO, R_M32R_GOT16_LO }, 1225 { BFD_RELOC_M32R_GOTPC_HI_ULO, R_M32R_GOTPC_HI_ULO }, 1226 { BFD_RELOC_M32R_GOTPC_HI_SLO, R_M32R_GOTPC_HI_SLO }, 1227 { BFD_RELOC_M32R_GOTPC_LO, R_M32R_GOTPC_LO }, 1228 { BFD_RELOC_M32R_GOTOFF_HI_ULO, R_M32R_GOTOFF_HI_ULO }, 1229 { BFD_RELOC_M32R_GOTOFF_HI_SLO, R_M32R_GOTOFF_HI_SLO }, 1230 { BFD_RELOC_M32R_GOTOFF_LO, R_M32R_GOTOFF_LO }, 1231 }; 1232 #endif 1233 1234 static reloc_howto_type * 1235 bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1236 bfd_reloc_code_real_type code) 1237 { 1238 unsigned int i; 1239 1240 #ifdef USE_M32R_OLD_RELOC 1241 for (i = 0; 1242 i < sizeof (m32r_reloc_map_old) / sizeof (struct m32r_reloc_map); 1243 i++) 1244 if (m32r_reloc_map_old[i].bfd_reloc_val == code) 1245 return &m32r_elf_howto_table[m32r_reloc_map_old[i].elf_reloc_val]; 1246 1247 #else /* ! USE_M32R_OLD_RELOC */ 1248 1249 for (i = 0; 1250 i < sizeof (m32r_reloc_map) / sizeof (struct m32r_reloc_map); 1251 i++) 1252 if (m32r_reloc_map[i].bfd_reloc_val == code) 1253 return &m32r_elf_howto_table[m32r_reloc_map[i].elf_reloc_val]; 1254 #endif 1255 1256 return NULL; 1257 } 1258 1259 static reloc_howto_type * 1260 bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1261 const char *r_name) 1262 { 1263 unsigned int i; 1264 1265 for (i = 0; 1266 i < sizeof (m32r_elf_howto_table) / sizeof (m32r_elf_howto_table[0]); 1267 i++) 1268 if (m32r_elf_howto_table[i].name != NULL 1269 && strcasecmp (m32r_elf_howto_table[i].name, r_name) == 0) 1270 return &m32r_elf_howto_table[i]; 1271 1272 return NULL; 1273 } 1274 1275 /* Set the howto pointer for an M32R ELF reloc. */ 1276 1277 static void 1278 m32r_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, 1279 arelent *cache_ptr, 1280 Elf_Internal_Rela *dst) 1281 { 1282 unsigned int r_type; 1283 1284 r_type = ELF32_R_TYPE (dst->r_info); 1285 if (r_type > (unsigned int) R_M32R_GNU_VTENTRY) 1286 { 1287 _bfd_error_handler (_("%B: invalid M32R reloc number: %d"), abfd, r_type); 1288 r_type = 0; 1289 } 1290 cache_ptr->howto = &m32r_elf_howto_table[r_type]; 1291 } 1292 1293 static void 1294 m32r_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 1295 arelent *cache_ptr, 1296 Elf_Internal_Rela *dst) 1297 { 1298 BFD_ASSERT ((ELF32_R_TYPE(dst->r_info) == (unsigned int) R_M32R_NONE) 1299 || ((ELF32_R_TYPE(dst->r_info) > (unsigned int) R_M32R_GNU_VTENTRY) 1300 && (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_M32R_max))); 1301 cache_ptr->howto = &m32r_elf_howto_table[ELF32_R_TYPE(dst->r_info)]; 1302 } 1303 1304 1305 /* Given a BFD section, try to locate the corresponding ELF section 1307 index. */ 1308 1309 static bfd_boolean 1310 _bfd_m32r_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, 1311 asection *sec, 1312 int *retval) 1313 { 1314 if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0) 1315 { 1316 *retval = SHN_M32R_SCOMMON; 1317 return TRUE; 1318 } 1319 return FALSE; 1320 } 1321 1322 /* M32R ELF uses two common sections. One is the usual one, and the other 1323 is for small objects. All the small objects are kept together, and then 1324 referenced via one register, which yields faster assembler code. It is 1325 up to the compiler to emit an instruction to load the register with 1326 _SDA_BASE. This is what we use for the small common section. This 1327 approach is copied from elf32-mips.c. */ 1328 static asection m32r_elf_scom_section; 1329 static asymbol m32r_elf_scom_symbol; 1330 static asymbol *m32r_elf_scom_symbol_ptr; 1331 1332 /* Handle the special M32R section numbers that a symbol may use. */ 1333 1334 static void 1335 _bfd_m32r_elf_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *asym) 1336 { 1337 elf_symbol_type *elfsym = (elf_symbol_type *) asym; 1338 1339 switch (elfsym->internal_elf_sym.st_shndx) 1340 { 1341 case SHN_M32R_SCOMMON: 1342 if (m32r_elf_scom_section.name == NULL) 1343 { 1344 /* Initialize the small common section. */ 1345 m32r_elf_scom_section.name = ".scommon"; 1346 m32r_elf_scom_section.flags = SEC_IS_COMMON; 1347 m32r_elf_scom_section.output_section = &m32r_elf_scom_section; 1348 m32r_elf_scom_section.symbol = &m32r_elf_scom_symbol; 1349 m32r_elf_scom_section.symbol_ptr_ptr = &m32r_elf_scom_symbol_ptr; 1350 m32r_elf_scom_symbol.name = ".scommon"; 1351 m32r_elf_scom_symbol.flags = BSF_SECTION_SYM; 1352 m32r_elf_scom_symbol.section = &m32r_elf_scom_section; 1353 m32r_elf_scom_symbol_ptr = &m32r_elf_scom_symbol; 1354 } 1355 asym->section = &m32r_elf_scom_section; 1356 asym->value = elfsym->internal_elf_sym.st_size; 1357 break; 1358 } 1359 } 1360 1361 /* Hook called by the linker routine which adds symbols from an object 1362 file. We must handle the special M32R section numbers here. 1363 We also keep watching for whether we need to create the sdata special 1364 linker sections. */ 1365 1366 static bfd_boolean 1367 m32r_elf_add_symbol_hook (bfd *abfd, 1368 struct bfd_link_info *info, 1369 Elf_Internal_Sym *sym, 1370 const char **namep, 1371 flagword *flagsp ATTRIBUTE_UNUSED, 1372 asection **secp, 1373 bfd_vma *valp) 1374 { 1375 if (! bfd_link_relocatable (info) 1376 && (*namep)[0] == '_' && (*namep)[1] == 'S' 1377 && strcmp (*namep, "_SDA_BASE_") == 0 1378 && is_elf_hash_table (info->hash)) 1379 { 1380 /* This is simpler than using _bfd_elf_create_linker_section 1381 (our needs are simpler than ppc's needs). Also 1382 _bfd_elf_create_linker_section currently has a bug where if a .sdata 1383 section already exists a new one is created that follows it which 1384 screws of _SDA_BASE_ address calcs because output_offset != 0. */ 1385 struct elf_link_hash_entry *h; 1386 struct bfd_link_hash_entry *bh; 1387 asection *s = bfd_get_section_by_name (abfd, ".sdata"); 1388 1389 /* The following code was cobbled from elf32-ppc.c and elflink.c. */ 1390 if (s == NULL) 1391 { 1392 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 1393 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 1394 1395 s = bfd_make_section_anyway_with_flags (abfd, ".sdata", 1396 flags); 1397 if (s == NULL) 1398 return FALSE; 1399 if (! bfd_set_section_alignment (abfd, s, 2)) 1400 return FALSE; 1401 } 1402 1403 bh = bfd_link_hash_lookup (info->hash, "_SDA_BASE_", 1404 FALSE, FALSE, FALSE); 1405 1406 if ((bh == NULL || bh->type == bfd_link_hash_undefined) 1407 && !(_bfd_generic_link_add_one_symbol (info, 1408 abfd, 1409 "_SDA_BASE_", 1410 BSF_GLOBAL, 1411 s, 1412 (bfd_vma) 32768, 1413 NULL, 1414 FALSE, 1415 get_elf_backend_data (abfd)->collect, 1416 &bh))) 1417 return FALSE; 1418 h = (struct elf_link_hash_entry *) bh; 1419 h->type = STT_OBJECT; 1420 } 1421 1422 switch (sym->st_shndx) 1423 { 1424 case SHN_M32R_SCOMMON: 1425 *secp = bfd_make_section_old_way (abfd, ".scommon"); 1426 (*secp)->flags |= SEC_IS_COMMON; 1427 *valp = sym->st_size; 1428 break; 1429 } 1430 1431 return TRUE; 1432 } 1433 1434 /* We have to figure out the SDA_BASE value, so that we can adjust the 1435 symbol value correctly. We look up the symbol _SDA_BASE_ in the output 1436 BFD. If we can't find it, we're stuck. We cache it in the ELF 1437 target data. We don't need to adjust the symbol value for an 1438 external symbol if we are producing relocatable output. */ 1439 1440 static bfd_reloc_status_type 1441 m32r_elf_final_sda_base (bfd *output_bfd, 1442 struct bfd_link_info *info, 1443 const char **error_message, 1444 bfd_vma *psb) 1445 { 1446 if (elf_gp (output_bfd) == 0) 1447 { 1448 struct bfd_link_hash_entry *h; 1449 1450 h = bfd_link_hash_lookup (info->hash, "_SDA_BASE_", FALSE, FALSE, TRUE); 1451 if (h != NULL && h->type == bfd_link_hash_defined) 1452 elf_gp (output_bfd) = (h->u.def.value 1453 + h->u.def.section->output_section->vma 1454 + h->u.def.section->output_offset); 1455 else 1456 { 1457 /* Only get the error once. */ 1458 *psb = elf_gp (output_bfd) = 4; 1459 *error_message = 1460 (const char *) _("SDA relocation when _SDA_BASE_ not defined"); 1461 return bfd_reloc_dangerous; 1462 } 1463 } 1464 *psb = elf_gp (output_bfd); 1465 return bfd_reloc_ok; 1466 } 1467 1468 /* Return size of a PLT entry. */ 1470 #define elf_m32r_sizeof_plt(info) PLT_ENTRY_SIZE 1471 1472 /* The m32r linker needs to keep track of the number of relocs that it 1473 decides to copy in check_relocs for each symbol. This is so that 1474 it can discard PC relative relocs if it doesn't need them when 1475 linking with -Bsymbolic. We store the information in a field 1476 extending the regular ELF linker hash table. */ 1477 1478 /* This structure keeps track of the number of PC relative relocs we 1479 have copied for a given symbol. */ 1480 1481 struct elf_m32r_pcrel_relocs_copied 1482 { 1483 /* Next section. */ 1484 struct elf_m32r_pcrel_relocs_copied *next; 1485 /* A section in dynobj. */ 1486 asection *section; 1487 /* Number of relocs copied in this section. */ 1488 bfd_size_type count; 1489 }; 1490 1491 /* The sh linker needs to keep track of the number of relocs that it 1492 decides to copy as dynamic relocs in check_relocs for each symbol. 1493 This is so that it can later discard them if they are found to be 1494 unnecessary. We store the information in a field extending the 1495 regular ELF linker hash table. */ 1496 1497 struct elf_m32r_dyn_relocs 1498 { 1499 struct elf_m32r_dyn_relocs *next; 1500 1501 /* The input section of the reloc. */ 1502 asection *sec; 1503 1504 /* Total number of relocs copied for the input section. */ 1505 bfd_size_type count; 1506 1507 /* Number of pc-relative relocs copied for the input section. */ 1508 bfd_size_type pc_count; 1509 }; 1510 1511 1512 /* m32r ELF linker hash entry. */ 1513 1514 struct elf_m32r_link_hash_entry 1515 { 1516 struct elf_link_hash_entry root; 1517 1518 /* Track dynamic relocs copied for this symbol. */ 1519 struct elf_m32r_dyn_relocs *dyn_relocs; 1520 }; 1521 1522 /* m32r ELF linker hash table. */ 1523 1524 struct elf_m32r_link_hash_table 1525 { 1526 struct elf_link_hash_table root; 1527 1528 /* Short-cuts to get to dynamic linker sections. */ 1529 asection *sgot; 1530 asection *sgotplt; 1531 asection *srelgot; 1532 asection *splt; 1533 asection *srelplt; 1534 asection *sdynbss; 1535 asection *srelbss; 1536 1537 /* Small local sym cache. */ 1538 struct sym_cache sym_cache; 1539 }; 1540 1541 /* Traverse an m32r ELF linker hash table. */ 1542 1543 #define m32r_elf_link_hash_traverse(table, func, info) \ 1544 (elf_link_hash_traverse \ 1545 (&(table)->root, \ 1546 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ 1547 (info))) 1548 1549 /* Get the m32r ELF linker hash table from a link_info structure. */ 1550 1551 #define m32r_elf_hash_table(p) \ 1552 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 1553 == M32R_ELF_DATA ? ((struct elf_m32r_link_hash_table *) ((p)->hash)) : NULL) 1554 1555 /* Create an entry in an m32r ELF linker hash table. */ 1556 1557 static struct bfd_hash_entry * 1558 m32r_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 1559 struct bfd_hash_table *table, 1560 const char *string) 1561 { 1562 struct elf_m32r_link_hash_entry *ret = 1563 (struct elf_m32r_link_hash_entry *) entry; 1564 1565 /* Allocate the structure if it has not already been allocated by a 1566 subclass. */ 1567 if (ret == NULL) 1568 ret = bfd_hash_allocate (table, 1569 sizeof (struct elf_m32r_link_hash_entry)); 1570 if (ret == NULL) 1571 return NULL; 1572 1573 /* Call the allocation method of the superclass. */ 1574 ret = ((struct elf_m32r_link_hash_entry *) 1575 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 1576 table, string)); 1577 if (ret != NULL) 1578 { 1579 struct elf_m32r_link_hash_entry *eh; 1580 1581 eh = (struct elf_m32r_link_hash_entry *) ret; 1582 eh->dyn_relocs = NULL; 1583 } 1584 1585 return (struct bfd_hash_entry *) ret; 1586 } 1587 1588 /* Create an m32r ELF linker hash table. */ 1589 1590 static struct bfd_link_hash_table * 1591 m32r_elf_link_hash_table_create (bfd *abfd) 1592 { 1593 struct elf_m32r_link_hash_table *ret; 1594 bfd_size_type amt = sizeof (struct elf_m32r_link_hash_table); 1595 1596 ret = bfd_zmalloc (amt); 1597 if (ret == NULL) 1598 return NULL; 1599 1600 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, 1601 m32r_elf_link_hash_newfunc, 1602 sizeof (struct elf_m32r_link_hash_entry), 1603 M32R_ELF_DATA)) 1604 { 1605 free (ret); 1606 return NULL; 1607 } 1608 1609 return &ret->root.root; 1610 } 1611 1612 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up 1613 shortcuts to them in our hash table. */ 1614 1615 static bfd_boolean 1616 create_got_section (bfd *dynobj, struct bfd_link_info *info) 1617 { 1618 struct elf_m32r_link_hash_table *htab; 1619 1620 if (! _bfd_elf_create_got_section (dynobj, info)) 1621 return FALSE; 1622 1623 htab = m32r_elf_hash_table (info); 1624 if (htab == NULL) 1625 return FALSE; 1626 1627 htab->sgot = bfd_get_linker_section (dynobj, ".got"); 1628 htab->sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); 1629 htab->srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 1630 if (! htab->sgot || ! htab->sgotplt || ! htab->srelgot) 1631 abort (); 1632 1633 return TRUE; 1634 } 1635 1636 /* Create dynamic sections when linking against a dynamic object. */ 1637 1638 static bfd_boolean 1639 m32r_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 1640 { 1641 struct elf_m32r_link_hash_table *htab; 1642 flagword flags, pltflags; 1643 asection *s; 1644 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 1645 int ptralign = 2; /* 32bit */ 1646 1647 htab = m32r_elf_hash_table (info); 1648 if (htab == NULL) 1649 return FALSE; 1650 1651 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and 1652 .rel[a].bss sections. */ 1653 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 1654 | SEC_LINKER_CREATED); 1655 1656 pltflags = flags; 1657 pltflags |= SEC_CODE; 1658 if (bed->plt_not_loaded) 1659 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); 1660 if (bed->plt_readonly) 1661 pltflags |= SEC_READONLY; 1662 1663 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); 1664 htab->splt = s; 1665 if (s == NULL 1666 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) 1667 return FALSE; 1668 1669 if (bed->want_plt_sym) 1670 { 1671 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the 1672 .plt section. */ 1673 struct bfd_link_hash_entry *bh = NULL; 1674 struct elf_link_hash_entry *h; 1675 1676 if (! (_bfd_generic_link_add_one_symbol 1677 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 1678 (bfd_vma) 0, NULL, FALSE, 1679 get_elf_backend_data (abfd)->collect, &bh))) 1680 return FALSE; 1681 h = (struct elf_link_hash_entry *) bh; 1682 h->def_regular = 1; 1683 h->type = STT_OBJECT; 1684 htab->root.hplt = h; 1685 1686 if (bfd_link_pic (info) 1687 && ! bfd_elf_link_record_dynamic_symbol (info, h)) 1688 return FALSE; 1689 } 1690 1691 s = bfd_make_section_anyway_with_flags (abfd, 1692 bed->default_use_rela_p 1693 ? ".rela.plt" : ".rel.plt", 1694 flags | SEC_READONLY); 1695 htab->srelplt = s; 1696 if (s == NULL 1697 || ! bfd_set_section_alignment (abfd, s, ptralign)) 1698 return FALSE; 1699 1700 if (htab->sgot == NULL 1701 && ! create_got_section (abfd, info)) 1702 return FALSE; 1703 1704 if (bed->want_dynbss) 1705 { 1706 /* The .dynbss section is a place to put symbols which are defined 1707 by dynamic objects, are referenced by regular objects, and are 1708 not functions. We must allocate space for them in the process 1709 image and use a R_*_COPY reloc to tell the dynamic linker to 1710 initialize them at run time. The linker script puts the .dynbss 1711 section into the .bss section of the final image. */ 1712 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", 1713 SEC_ALLOC | SEC_LINKER_CREATED); 1714 htab->sdynbss = s; 1715 if (s == NULL) 1716 return FALSE; 1717 /* The .rel[a].bss section holds copy relocs. This section is not 1718 normally needed. We need to create it here, though, so that the 1719 linker will map it to an output section. We can't just create it 1720 only if we need it, because we will not know whether we need it 1721 until we have seen all the input files, and the first time the 1722 main linker code calls BFD after examining all the input files 1723 (size_dynamic_sections) the input sections have already been 1724 mapped to the output sections. If the section turns out not to 1725 be needed, we can discard it later. We will never need this 1726 section when generating a shared object, since they do not use 1727 copy relocs. */ 1728 if (! bfd_link_pic (info)) 1729 { 1730 s = bfd_make_section_anyway_with_flags (abfd, 1731 (bed->default_use_rela_p 1732 ? ".rela.bss" : ".rel.bss"), 1733 flags | SEC_READONLY); 1734 htab->srelbss = s; 1735 if (s == NULL 1736 || ! bfd_set_section_alignment (abfd, s, ptralign)) 1737 return FALSE; 1738 } 1739 } 1740 1741 return TRUE; 1742 } 1743 1744 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 1745 1746 static void 1747 m32r_elf_copy_indirect_symbol (struct bfd_link_info *info, 1748 struct elf_link_hash_entry *dir, 1749 struct elf_link_hash_entry *ind) 1750 { 1751 struct elf_m32r_link_hash_entry * edir; 1752 struct elf_m32r_link_hash_entry * eind; 1753 1754 edir = (struct elf_m32r_link_hash_entry *) dir; 1755 eind = (struct elf_m32r_link_hash_entry *) ind; 1756 1757 if (eind->dyn_relocs != NULL) 1758 { 1759 if (edir->dyn_relocs != NULL) 1760 { 1761 struct elf_m32r_dyn_relocs **pp; 1762 struct elf_m32r_dyn_relocs *p; 1763 1764 /* Add reloc counts against the indirect sym to the direct sym 1765 list. Merge any entries against the same section. */ 1766 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) 1767 { 1768 struct elf_m32r_dyn_relocs *q; 1769 1770 for (q = edir->dyn_relocs; q != NULL; q = q->next) 1771 if (q->sec == p->sec) 1772 { 1773 q->pc_count += p->pc_count; 1774 q->count += p->count; 1775 *pp = p->next; 1776 break; 1777 } 1778 if (q == NULL) 1779 pp = &p->next; 1780 } 1781 *pp = edir->dyn_relocs; 1782 } 1783 1784 edir->dyn_relocs = eind->dyn_relocs; 1785 eind->dyn_relocs = NULL; 1786 } 1787 1788 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 1789 } 1790 1791 1792 /* Adjust a symbol defined by a dynamic object and referenced by a 1794 regular object. The current definition is in some section of the 1795 dynamic object, but we're not including those sections. We have to 1796 change the definition to something the rest of the link can 1797 understand. */ 1798 1799 static bfd_boolean 1800 m32r_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 1801 struct elf_link_hash_entry *h) 1802 { 1803 struct elf_m32r_link_hash_table *htab; 1804 struct elf_m32r_link_hash_entry *eh; 1805 struct elf_m32r_dyn_relocs *p; 1806 bfd *dynobj; 1807 asection *s; 1808 1809 #ifdef DEBUG_PIC 1810 printf ("m32r_elf_adjust_dynamic_symbol()\n"); 1811 #endif 1812 1813 dynobj = elf_hash_table (info)->dynobj; 1814 1815 /* Make sure we know what is going on here. */ 1816 BFD_ASSERT (dynobj != NULL 1817 && (h->needs_plt 1818 || h->u.weakdef != NULL 1819 || (h->def_dynamic 1820 && h->ref_regular 1821 && !h->def_regular))); 1822 1823 /* If this is a function, put it in the procedure linkage table. We 1824 will fill in the contents of the procedure linkage table later, 1825 when we know the address of the .got section. */ 1826 if (h->type == STT_FUNC 1827 || h->needs_plt) 1828 { 1829 if (! bfd_link_pic (info) 1830 && !h->def_dynamic 1831 && !h->ref_dynamic 1832 && h->root.type != bfd_link_hash_undefweak 1833 && h->root.type != bfd_link_hash_undefined) 1834 { 1835 /* This case can occur if we saw a PLT reloc in an input 1836 file, but the symbol was never referred to by a dynamic 1837 object. In such a case, we don't actually need to build 1838 a procedure linkage table, and we can just do a PCREL 1839 reloc instead. */ 1840 h->plt.offset = (bfd_vma) -1; 1841 h->needs_plt = 0; 1842 } 1843 1844 return TRUE; 1845 } 1846 else 1847 h->plt.offset = (bfd_vma) -1; 1848 1849 /* If this is a weak symbol, and there is a real definition, the 1850 processor independent code will have arranged for us to see the 1851 real definition first, and we can just use the same value. */ 1852 if (h->u.weakdef != NULL) 1853 { 1854 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 1855 || h->u.weakdef->root.type == bfd_link_hash_defweak); 1856 h->root.u.def.section = h->u.weakdef->root.u.def.section; 1857 h->root.u.def.value = h->u.weakdef->root.u.def.value; 1858 return TRUE; 1859 } 1860 1861 /* This is a reference to a symbol defined by a dynamic object which 1862 is not a function. */ 1863 1864 /* If we are creating a shared library, we must presume that the 1865 only references to the symbol are via the global offset table. 1866 For such cases we need not do anything here; the relocations will 1867 be handled correctly by relocate_section. */ 1868 if (bfd_link_pic (info)) 1869 return TRUE; 1870 1871 /* If there are no references to this symbol that do not use the 1872 GOT, we don't need to generate a copy reloc. */ 1873 if (!h->non_got_ref) 1874 return TRUE; 1875 1876 /* If -z nocopyreloc was given, we won't generate them either. */ 1877 if (info->nocopyreloc) 1878 { 1879 h->non_got_ref = 0; 1880 return TRUE; 1881 } 1882 1883 eh = (struct elf_m32r_link_hash_entry *) h; 1884 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1885 { 1886 s = p->sec->output_section; 1887 if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0) 1888 break; 1889 } 1890 1891 /* If we didn't find any dynamic relocs in sections which needs the 1892 copy reloc, then we'll be keeping the dynamic relocs and avoiding 1893 the copy reloc. */ 1894 if (p == NULL) 1895 { 1896 h->non_got_ref = 0; 1897 return TRUE; 1898 } 1899 1900 /* We must allocate the symbol in our .dynbss section, which will 1901 become part of the .bss section of the executable. There will be 1902 an entry for this symbol in the .dynsym section. The dynamic 1903 object will contain position independent code, so all references 1904 from the dynamic object to this symbol will go through the global 1905 offset table. The dynamic linker will use the .dynsym entry to 1906 determine the address it must put in the global offset table, so 1907 both the dynamic object and the regular object will refer to the 1908 same memory location for the variable. */ 1909 1910 htab = m32r_elf_hash_table (info); 1911 if (htab == NULL) 1912 return FALSE; 1913 1914 s = htab->sdynbss; 1915 BFD_ASSERT (s != NULL); 1916 1917 /* We must generate a R_M32R_COPY reloc to tell the dynamic linker 1918 to copy the initial value out of the dynamic object and into the 1919 runtime process image. We need to remember the offset into the 1920 .rela.bss section we are going to use. */ 1921 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 1922 { 1923 asection *srel; 1924 1925 srel = htab->srelbss; 1926 BFD_ASSERT (srel != NULL); 1927 srel->size += sizeof (Elf32_External_Rela); 1928 h->needs_copy = 1; 1929 } 1930 1931 return _bfd_elf_adjust_dynamic_copy (info, h, s); 1932 } 1933 1934 /* Allocate space in .plt, .got and associated reloc sections for 1935 dynamic relocs. */ 1936 1937 static bfd_boolean 1938 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) 1939 { 1940 struct bfd_link_info *info; 1941 struct elf_m32r_link_hash_table *htab; 1942 struct elf_m32r_link_hash_entry *eh; 1943 struct elf_m32r_dyn_relocs *p; 1944 1945 if (h->root.type == bfd_link_hash_indirect) 1946 return TRUE; 1947 1948 info = (struct bfd_link_info *) inf; 1949 htab = m32r_elf_hash_table (info); 1950 if (htab == NULL) 1951 return FALSE; 1952 1953 eh = (struct elf_m32r_link_hash_entry *) h; 1954 1955 if (htab->root.dynamic_sections_created 1956 && h->plt.refcount > 0) 1957 { 1958 /* Make sure this symbol is output as a dynamic symbol. 1959 Undefined weak syms won't yet be marked as dynamic. */ 1960 if (h->dynindx == -1 1961 && !h->forced_local) 1962 { 1963 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1964 return FALSE; 1965 } 1966 1967 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) 1968 { 1969 asection *s = htab->splt; 1970 1971 /* If this is the first .plt entry, make room for the special 1972 first entry. */ 1973 if (s->size == 0) 1974 s->size += PLT_ENTRY_SIZE; 1975 1976 h->plt.offset = s->size; 1977 1978 /* If this symbol is not defined in a regular file, and we are 1979 not generating a shared library, then set the symbol to this 1980 location in the .plt. This is required to make function 1981 pointers compare as equal between the normal executable and 1982 the shared library. */ 1983 if (! bfd_link_pic (info) 1984 && !h->def_regular) 1985 { 1986 h->root.u.def.section = s; 1987 h->root.u.def.value = h->plt.offset; 1988 } 1989 1990 /* Make room for this entry. */ 1991 s->size += PLT_ENTRY_SIZE; 1992 1993 /* We also need to make an entry in the .got.plt section, which 1994 will be placed in the .got section by the linker script. */ 1995 htab->sgotplt->size += 4; 1996 1997 /* We also need to make an entry in the .rel.plt section. */ 1998 htab->srelplt->size += sizeof (Elf32_External_Rela); 1999 } 2000 else 2001 { 2002 h->plt.offset = (bfd_vma) -1; 2003 h->needs_plt = 0; 2004 } 2005 } 2006 else 2007 { 2008 h->plt.offset = (bfd_vma) -1; 2009 h->needs_plt = 0; 2010 } 2011 2012 if (h->got.refcount > 0) 2013 { 2014 asection *s; 2015 bfd_boolean dyn; 2016 2017 /* Make sure this symbol is output as a dynamic symbol. 2018 Undefined weak syms won't yet be marked as dynamic. */ 2019 if (h->dynindx == -1 2020 && !h->forced_local) 2021 { 2022 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2023 return FALSE; 2024 } 2025 2026 s = htab->sgot; 2027 2028 h->got.offset = s->size; 2029 s->size += 4; 2030 dyn = htab->root.dynamic_sections_created; 2031 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)) 2032 htab->srelgot->size += sizeof (Elf32_External_Rela); 2033 } 2034 else 2035 h->got.offset = (bfd_vma) -1; 2036 2037 if (eh->dyn_relocs == NULL) 2038 return TRUE; 2039 2040 /* In the shared -Bsymbolic case, discard space allocated for 2041 dynamic pc-relative relocs against symbols which turn out to be 2042 defined in regular objects. For the normal shared case, discard 2043 space for pc-relative relocs that have become local due to symbol 2044 visibility changes. */ 2045 2046 if (bfd_link_pic (info)) 2047 { 2048 if (h->def_regular 2049 && (h->forced_local 2050 || info->symbolic)) 2051 { 2052 struct elf_m32r_dyn_relocs **pp; 2053 2054 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;) 2055 { 2056 p->count -= p->pc_count; 2057 p->pc_count = 0; 2058 if (p->count == 0) 2059 *pp = p->next; 2060 else 2061 pp = &p->next; 2062 } 2063 } 2064 2065 /* Also discard relocs on undefined weak syms with non-default 2066 visibility. */ 2067 if (eh->dyn_relocs != NULL 2068 && h->root.type == bfd_link_hash_undefweak) 2069 { 2070 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 2071 eh->dyn_relocs = NULL; 2072 2073 /* Make sure undefined weak symbols are output as a dynamic 2074 symbol in PIEs. */ 2075 else if (h->dynindx == -1 2076 && !h->forced_local) 2077 { 2078 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2079 return FALSE; 2080 } 2081 } 2082 } 2083 else 2084 { 2085 /* For the non-shared case, discard space for relocs against 2086 symbols which turn out to need copy relocs or are not 2087 dynamic. */ 2088 2089 if (!h->non_got_ref 2090 && ((h->def_dynamic 2091 && !h->def_regular) 2092 || (htab->root.dynamic_sections_created 2093 && (h->root.type == bfd_link_hash_undefweak 2094 || h->root.type == bfd_link_hash_undefined)))) 2095 { 2096 /* Make sure this symbol is output as a dynamic symbol. 2097 Undefined weak syms won't yet be marked as dynamic. */ 2098 if (h->dynindx == -1 2099 && !h->forced_local) 2100 { 2101 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2102 return FALSE; 2103 } 2104 2105 /* If that succeeded, we know we'll be keeping all the 2106 relocs. */ 2107 if (h->dynindx != -1) 2108 goto keep; 2109 } 2110 2111 eh->dyn_relocs = NULL; 2112 2113 keep: ; 2114 } 2115 2116 /* Finally, allocate space. */ 2117 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2118 { 2119 asection *sreloc = elf_section_data (p->sec)->sreloc; 2120 sreloc->size += p->count * sizeof (Elf32_External_Rela); 2121 } 2122 2123 return TRUE; 2124 } 2125 2126 /* Find any dynamic relocs that apply to read-only sections. */ 2127 2128 static bfd_boolean 2129 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) 2130 { 2131 struct elf_m32r_link_hash_entry *eh; 2132 struct elf_m32r_dyn_relocs *p; 2133 2134 eh = (struct elf_m32r_link_hash_entry *) h; 2135 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2136 { 2137 asection *s = p->sec->output_section; 2138 2139 if (s != NULL && (s->flags & SEC_READONLY) != 0) 2140 { 2141 struct bfd_link_info *info = (struct bfd_link_info *) inf; 2142 2143 info->flags |= DF_TEXTREL; 2144 2145 /* Not an error, just cut short the traversal. */ 2146 return FALSE; 2147 } 2148 } 2149 return TRUE; 2150 } 2151 2152 /* Set the sizes of the dynamic sections. */ 2153 2154 static bfd_boolean 2155 m32r_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 2156 struct bfd_link_info *info) 2157 { 2158 struct elf_m32r_link_hash_table *htab; 2159 bfd *dynobj; 2160 asection *s; 2161 bfd_boolean relocs; 2162 bfd *ibfd; 2163 2164 #ifdef DEBUG_PIC 2165 printf ("m32r_elf_size_dynamic_sections()\n"); 2166 #endif 2167 2168 htab = m32r_elf_hash_table (info); 2169 if (htab == NULL) 2170 return FALSE; 2171 2172 dynobj = htab->root.dynobj; 2173 BFD_ASSERT (dynobj != NULL); 2174 2175 if (htab->root.dynamic_sections_created) 2176 { 2177 /* Set the contents of the .interp section to the interpreter. */ 2178 if (bfd_link_executable (info) && !info->nointerp) 2179 { 2180 s = bfd_get_linker_section (dynobj, ".interp"); 2181 BFD_ASSERT (s != NULL); 2182 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 2183 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 2184 } 2185 } 2186 2187 /* Set up .got offsets for local syms, and space for local dynamic 2188 relocs. */ 2189 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 2190 { 2191 bfd_signed_vma *local_got; 2192 bfd_signed_vma *end_local_got; 2193 bfd_size_type locsymcount; 2194 Elf_Internal_Shdr *symtab_hdr; 2195 asection *srel; 2196 2197 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 2198 continue; 2199 2200 for (s = ibfd->sections; s != NULL; s = s->next) 2201 { 2202 struct elf_m32r_dyn_relocs *p; 2203 2204 for (p = ((struct elf_m32r_dyn_relocs *) 2205 elf_section_data (s)->local_dynrel); 2206 p != NULL; 2207 p = p->next) 2208 { 2209 if (! bfd_is_abs_section (p->sec) 2210 && bfd_is_abs_section (p->sec->output_section)) 2211 { 2212 /* Input section has been discarded, either because 2213 it is a copy of a linkonce section or due to 2214 linker script /DISCARD/, so we'll be discarding 2215 the relocs too. */ 2216 } 2217 else if (p->count != 0) 2218 { 2219 srel = elf_section_data (p->sec)->sreloc; 2220 srel->size += p->count * sizeof (Elf32_External_Rela); 2221 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2222 info->flags |= DF_TEXTREL; 2223 } 2224 } 2225 } 2226 2227 local_got = elf_local_got_refcounts (ibfd); 2228 if (!local_got) 2229 continue; 2230 2231 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2232 locsymcount = symtab_hdr->sh_info; 2233 end_local_got = local_got + locsymcount; 2234 s = htab->sgot; 2235 srel = htab->srelgot; 2236 for (; local_got < end_local_got; ++local_got) 2237 { 2238 if (*local_got > 0) 2239 { 2240 *local_got = s->size; 2241 s->size += 4; 2242 if (bfd_link_pic (info)) 2243 srel->size += sizeof (Elf32_External_Rela); 2244 } 2245 else 2246 *local_got = (bfd_vma) -1; 2247 } 2248 } 2249 2250 /* Allocate global sym .plt and .got entries, and space for global 2251 sym dynamic relocs. */ 2252 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info); 2253 2254 /* We now have determined the sizes of the various dynamic sections. 2255 Allocate memory for them. */ 2256 relocs = FALSE; 2257 for (s = dynobj->sections; s != NULL; s = s->next) 2258 { 2259 if ((s->flags & SEC_LINKER_CREATED) == 0) 2260 continue; 2261 2262 if (s == htab->splt 2263 || s == htab->sgot 2264 || s == htab->sgotplt 2265 || s == htab->sdynbss) 2266 { 2267 /* Strip this section if we don't need it; see the 2268 comment below. */ 2269 } 2270 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) 2271 { 2272 if (s->size != 0 && s != htab->srelplt) 2273 relocs = TRUE; 2274 2275 /* We use the reloc_count field as a counter if we need 2276 to copy relocs into the output file. */ 2277 s->reloc_count = 0; 2278 } 2279 else 2280 /* It's not one of our sections, so don't allocate space. */ 2281 continue; 2282 2283 if (s->size == 0) 2284 { 2285 /* If we don't need this section, strip it from the 2286 output file. This is mostly to handle .rela.bss and 2287 .rela.plt. We must create both sections in 2288 create_dynamic_sections, because they must be created 2289 before the linker maps input sections to output 2290 sections. The linker does that before 2291 adjust_dynamic_symbol is called, and it is that 2292 function which decides whether anything needs to go 2293 into these sections. */ 2294 s->flags |= SEC_EXCLUDE; 2295 continue; 2296 } 2297 2298 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2299 continue; 2300 2301 /* Allocate memory for the section contents. We use bfd_zalloc 2302 here in case unused entries are not reclaimed before the 2303 section's contents are written out. This should not happen, 2304 but this way if it does, we get a R_M32R_NONE reloc instead 2305 of garbage. */ 2306 s->contents = bfd_zalloc (dynobj, s->size); 2307 if (s->contents == NULL) 2308 return FALSE; 2309 } 2310 2311 if (htab->root.dynamic_sections_created) 2312 { 2313 /* Add some entries to the .dynamic section. We fill in the 2314 values later, in m32r_elf_finish_dynamic_sections, but we 2315 must add the entries now so that we get the correct size for 2316 the .dynamic section. The DT_DEBUG entry is filled in by the 2317 dynamic linker and used by the debugger. */ 2318 #define add_dynamic_entry(TAG, VAL) \ 2319 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2320 2321 if (bfd_link_executable (info)) 2322 { 2323 if (! add_dynamic_entry (DT_DEBUG, 0)) 2324 return FALSE; 2325 } 2326 2327 if (htab->splt->size != 0) 2328 { 2329 if (! add_dynamic_entry (DT_PLTGOT, 0) 2330 || ! add_dynamic_entry (DT_PLTRELSZ, 0) 2331 || ! add_dynamic_entry (DT_PLTREL, DT_RELA) 2332 || ! add_dynamic_entry (DT_JMPREL, 0)) 2333 return FALSE; 2334 } 2335 2336 if (relocs) 2337 { 2338 if (! add_dynamic_entry (DT_RELA, 0) 2339 || ! add_dynamic_entry (DT_RELASZ, 0) 2340 || ! add_dynamic_entry (DT_RELAENT, 2341 sizeof (Elf32_External_Rela))) 2342 return FALSE; 2343 2344 /* If any dynamic relocs apply to a read-only section, 2345 then we need a DT_TEXTREL entry. */ 2346 if ((info->flags & DF_TEXTREL) == 0) 2347 elf_link_hash_traverse (&htab->root, readonly_dynrelocs, 2348 info); 2349 2350 if ((info->flags & DF_TEXTREL) != 0) 2351 { 2352 if (! add_dynamic_entry (DT_TEXTREL, 0)) 2353 return FALSE; 2354 } 2355 } 2356 } 2357 #undef add_dynamic_entry 2358 2359 return TRUE; 2360 } 2361 2362 /* Relocate an M32R/D ELF section. 2363 There is some attempt to make this function usable for many architectures, 2364 both for RELA and REL type relocs, if only to serve as a learning tool. 2365 2366 The RELOCATE_SECTION function is called by the new ELF backend linker 2367 to handle the relocations for a section. 2368 2369 The relocs are always passed as Rela structures; if the section 2370 actually uses Rel structures, the r_addend field will always be 2371 zero. 2372 2373 This function is responsible for adjust the section contents as 2374 necessary, and (if using Rela relocs and generating a 2375 relocatable output file) adjusting the reloc addend as 2376 necessary. 2377 2378 This function does not have to worry about setting the reloc 2379 address or the reloc symbol index. 2380 2381 LOCAL_SYMS is a pointer to the swapped in local symbols. 2382 2383 LOCAL_SECTIONS is an array giving the section in the input file 2384 corresponding to the st_shndx field of each local symbol. 2385 2386 The global hash table entry for the global symbols can be found 2387 via elf_sym_hashes (input_bfd). 2388 2389 When generating relocatable output, this function must handle 2390 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 2391 going to be the section symbol corresponding to the output 2392 section, which means that the addend must be adjusted 2393 accordingly. */ 2394 2395 static bfd_boolean 2396 m32r_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, 2397 struct bfd_link_info *info, 2398 bfd *input_bfd, 2399 asection *input_section, 2400 bfd_byte *contents, 2401 Elf_Internal_Rela *relocs, 2402 Elf_Internal_Sym *local_syms, 2403 asection **local_sections) 2404 { 2405 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 2406 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); 2407 Elf_Internal_Rela *rel, *relend; 2408 /* Assume success. */ 2409 bfd_boolean ret = TRUE; 2410 struct elf_m32r_link_hash_table *htab = m32r_elf_hash_table (info); 2411 bfd *dynobj; 2412 bfd_vma *local_got_offsets; 2413 asection *sgot, *splt, *sreloc; 2414 bfd_vma high_address = bfd_get_section_limit (input_bfd, input_section); 2415 2416 if (htab == NULL) 2417 return FALSE; 2418 2419 dynobj = htab->root.dynobj; 2420 local_got_offsets = elf_local_got_offsets (input_bfd); 2421 2422 sgot = htab->sgot; 2423 splt = htab->splt; 2424 sreloc = NULL; 2425 2426 rel = relocs; 2427 relend = relocs + input_section->reloc_count; 2428 for (; rel < relend; rel++) 2429 { 2430 int r_type; 2431 reloc_howto_type *howto; 2432 unsigned long r_symndx; 2433 struct elf_link_hash_entry *h; 2434 /* We can't modify r_addend here as elf_link_input_bfd has an assert to 2435 ensure it's zero (we use REL relocs, not RELA). Therefore this 2436 should be assigning zero to `addend', but for clarity we use 2437 `r_addend'. */ 2438 bfd_vma addend = rel->r_addend; 2439 bfd_vma offset = rel->r_offset; 2440 bfd_vma relocation; 2441 Elf_Internal_Sym *sym; 2442 asection *sec; 2443 const char *sym_name; 2444 bfd_reloc_status_type r; 2445 const char *errmsg = NULL; 2446 bfd_boolean use_rel = FALSE; 2447 2448 h = NULL; 2449 r_type = ELF32_R_TYPE (rel->r_info); 2450 if (r_type < 0 || r_type >= (int) R_M32R_max) 2451 { 2452 (*_bfd_error_handler) (_("%B: unknown relocation type %d"), 2453 input_bfd, 2454 (int) r_type); 2455 bfd_set_error (bfd_error_bad_value); 2456 ret = FALSE; 2457 continue; 2458 } 2459 2460 if ( r_type == R_M32R_GNU_VTENTRY 2461 || r_type == R_M32R_GNU_VTINHERIT 2462 || r_type == R_M32R_NONE 2463 || r_type == R_M32R_RELA_GNU_VTENTRY 2464 || r_type == R_M32R_RELA_GNU_VTINHERIT) 2465 continue; 2466 2467 if (r_type <= R_M32R_GNU_VTENTRY) 2468 use_rel = TRUE; 2469 2470 howto = m32r_elf_howto_table + r_type; 2471 r_symndx = ELF32_R_SYM (rel->r_info); 2472 2473 sym = NULL; 2474 sec = NULL; 2475 h = NULL; 2476 2477 if (r_symndx < symtab_hdr->sh_info) 2478 { 2479 /* Local symbol. */ 2480 sym = local_syms + r_symndx; 2481 sec = local_sections[r_symndx]; 2482 sym_name = "<local symbol>"; 2483 2484 if (!use_rel) 2485 { 2486 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 2487 addend = rel->r_addend; 2488 } 2489 else 2490 { 2491 relocation = (sec->output_section->vma 2492 + sec->output_offset 2493 + sym->st_value); 2494 } 2495 } 2496 else 2497 { 2498 /* External symbol. */ 2499 relocation = 0; 2500 2501 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 2502 2503 if (info->wrap_hash != NULL 2504 && (input_section->flags & SEC_DEBUGGING) != 0) 2505 h = ((struct elf_link_hash_entry *) 2506 unwrap_hash_lookup (info, input_bfd, &h->root)); 2507 2508 while (h->root.type == bfd_link_hash_indirect 2509 || h->root.type == bfd_link_hash_warning) 2510 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2511 sym_name = h->root.root.string; 2512 2513 if (h->root.type == bfd_link_hash_defined 2514 || h->root.type == bfd_link_hash_defweak) 2515 { 2516 bfd_boolean dyn; 2517 sec = h->root.u.def.section; 2518 2519 dyn = htab->root.dynamic_sections_created; 2520 sec = h->root.u.def.section; 2521 if (r_type == R_M32R_GOTPC24 2522 || (r_type == R_M32R_GOTPC_HI_ULO 2523 || r_type == R_M32R_GOTPC_HI_SLO 2524 || r_type == R_M32R_GOTPC_LO) 2525 || (r_type == R_M32R_26_PLTREL 2526 && h->plt.offset != (bfd_vma) -1) 2527 || ((r_type == R_M32R_GOT24 2528 || r_type == R_M32R_GOT16_HI_ULO 2529 || r_type == R_M32R_GOT16_HI_SLO 2530 || r_type == R_M32R_GOT16_LO) 2531 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 2532 bfd_link_pic (info), 2533 h) 2534 && (! bfd_link_pic (info) 2535 || (! info->symbolic && h->dynindx != -1) 2536 || !h->def_regular)) 2537 || (bfd_link_pic (info) 2538 && ((! info->symbolic && h->dynindx != -1) 2539 || !h->def_regular) 2540 && (((r_type == R_M32R_16_RELA 2541 || r_type == R_M32R_32_RELA 2542 || r_type == R_M32R_24_RELA 2543 || r_type == R_M32R_HI16_ULO_RELA 2544 || r_type == R_M32R_HI16_SLO_RELA 2545 || r_type == R_M32R_LO16_RELA) 2546 && !h->forced_local) 2547 || r_type == R_M32R_REL32 2548 || r_type == R_M32R_10_PCREL_RELA 2549 || r_type == R_M32R_18_PCREL_RELA 2550 || r_type == R_M32R_26_PCREL_RELA) 2551 && ((input_section->flags & SEC_ALLOC) != 0 2552 /* DWARF will emit R_M32R_16(24,32) relocations 2553 in its sections against symbols defined 2554 externally in shared libraries. We can't do 2555 anything with them here. */ 2556 || ((input_section->flags & SEC_DEBUGGING) != 0 2557 && h->def_dynamic)))) 2558 { 2559 /* In these cases, we don't need the relocation 2560 value. We check specially because in some 2561 obscure cases sec->output_section will be NULL. */ 2562 } 2563 else if (sec->output_section != NULL) 2564 relocation = (h->root.u.def.value 2565 + sec->output_section->vma 2566 + sec->output_offset); 2567 else if (!bfd_link_relocatable (info) 2568 && (_bfd_elf_section_offset (output_bfd, info, 2569 input_section, 2570 rel->r_offset) 2571 != (bfd_vma) -1)) 2572 { 2573 (*_bfd_error_handler) 2574 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), 2575 input_bfd, 2576 input_section, 2577 (long) rel->r_offset, 2578 howto->name, 2579 h->root.root.string); 2580 } 2581 } 2582 else if (h->root.type == bfd_link_hash_undefweak) 2583 ; 2584 else if (info->unresolved_syms_in_objects == RM_IGNORE 2585 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) 2586 ; 2587 else if (!bfd_link_relocatable (info)) 2588 (*info->callbacks->undefined_symbol) 2589 (info, h->root.root.string, input_bfd, 2590 input_section, offset, 2591 (info->unresolved_syms_in_objects == RM_GENERATE_ERROR 2592 || ELF_ST_VISIBILITY (h->other))); 2593 } 2594 2595 if (sec != NULL && discarded_section (sec)) 2596 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2597 rel, 1, relend, howto, 0, contents); 2598 2599 if (bfd_link_relocatable (info) && !use_rel) 2600 { 2601 /* This is a relocatable link. We don't have to change 2602 anything, unless the reloc is against a section symbol, 2603 in which case we have to adjust according to where the 2604 section symbol winds up in the output section. */ 2605 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) 2606 rel->r_addend += sec->output_offset; 2607 continue; 2608 } 2609 2610 if (bfd_link_relocatable (info) && use_rel) 2611 { 2612 /* This is a relocatable link. We don't have to change 2613 anything, unless the reloc is against a section symbol, 2614 in which case we have to adjust according to where the 2615 section symbol winds up in the output section. */ 2616 if (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION) 2617 continue; 2618 2619 addend += sec->output_offset; 2620 2621 /* If partial_inplace, we need to store any additional addend 2622 back in the section. */ 2623 if (! howto->partial_inplace) 2624 continue; 2625 /* ??? Here is a nice place to call a special_function 2626 like handler. */ 2627 if (r_type != R_M32R_HI16_SLO && r_type != R_M32R_HI16_ULO) 2628 r = _bfd_relocate_contents (howto, input_bfd, 2629 addend, contents + offset); 2630 else 2631 { 2632 Elf_Internal_Rela *lorel; 2633 2634 /* We allow an arbitrary number of HI16 relocs before the 2635 LO16 reloc. This permits gcc to emit the HI and LO relocs 2636 itself. */ 2637 for (lorel = rel + 1; 2638 (lorel < relend 2639 && (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO 2640 || ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO)); 2641 lorel++) 2642 continue; 2643 if (lorel < relend 2644 && ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16) 2645 { 2646 m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel, 2647 contents, addend); 2648 r = bfd_reloc_ok; 2649 } 2650 else 2651 r = _bfd_relocate_contents (howto, input_bfd, 2652 addend, contents + offset); 2653 } 2654 } 2655 else 2656 { 2657 /* Sanity check the address. */ 2658 if (offset > high_address) 2659 { 2660 r = bfd_reloc_outofrange; 2661 goto check_reloc; 2662 } 2663 2664 switch ((int) r_type) 2665 { 2666 case R_M32R_GOTOFF: 2667 /* Relocation is relative to the start of the global offset 2668 table (for ld24 rx, #uimm24). eg access at label+addend 2669 2670 ld24 rx. #label@GOTOFF + addend 2671 sub rx, r12. */ 2672 2673 BFD_ASSERT (sgot != NULL); 2674 2675 relocation = -(relocation - sgot->output_section->vma); 2676 rel->r_addend = -rel->r_addend; 2677 break; 2678 2679 case R_M32R_GOTOFF_HI_ULO: 2680 case R_M32R_GOTOFF_HI_SLO: 2681 case R_M32R_GOTOFF_LO: 2682 BFD_ASSERT (sgot != NULL); 2683 2684 relocation -= sgot->output_section->vma; 2685 2686 if ((r_type == R_M32R_GOTOFF_HI_SLO) 2687 && ((relocation + rel->r_addend) & 0x8000)) 2688 rel->r_addend += 0x10000; 2689 break; 2690 2691 case R_M32R_GOTPC24: 2692 /* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation 2693 ld24 rx,#_GLOBAL_OFFSET_TABLE_ 2694 */ 2695 relocation = sgot->output_section->vma; 2696 break; 2697 2698 case R_M32R_GOTPC_HI_ULO: 2699 case R_M32R_GOTPC_HI_SLO: 2700 case R_M32R_GOTPC_LO: 2701 { 2702 /* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation 2703 bl .+4 2704 seth rx,#high(_GLOBAL_OFFSET_TABLE_) 2705 or3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4) 2706 or 2707 bl .+4 2708 seth rx,#shigh(_GLOBAL_OFFSET_TABLE_) 2709 add3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4) 2710 */ 2711 relocation = sgot->output_section->vma; 2712 relocation -= (input_section->output_section->vma 2713 + input_section->output_offset 2714 + rel->r_offset); 2715 if ((r_type == R_M32R_GOTPC_HI_SLO) 2716 && ((relocation + rel->r_addend) & 0x8000)) 2717 rel->r_addend += 0x10000; 2718 2719 break; 2720 } 2721 case R_M32R_GOT16_HI_ULO: 2722 case R_M32R_GOT16_HI_SLO: 2723 case R_M32R_GOT16_LO: 2724 /* Fall through. */ 2725 case R_M32R_GOT24: 2726 /* Relocation is to the entry for this symbol in the global 2727 offset table. */ 2728 BFD_ASSERT (sgot != NULL); 2729 2730 if (h != NULL) 2731 { 2732 bfd_boolean dyn; 2733 bfd_vma off; 2734 2735 off = h->got.offset; 2736 BFD_ASSERT (off != (bfd_vma) -1); 2737 2738 dyn = htab->root.dynamic_sections_created; 2739 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 2740 bfd_link_pic (info), 2741 h) 2742 || (bfd_link_pic (info) 2743 && (info->symbolic 2744 || h->dynindx == -1 2745 || h->forced_local) 2746 && h->def_regular)) 2747 { 2748 /* This is actually a static link, or it is a 2749 -Bsymbolic link and the symbol is defined 2750 locally, or the symbol was forced to be local 2751 because of a version file. We must initialize 2752 this entry in the global offset table. Since the 2753 offset must always be a multiple of 4, we use the 2754 least significant bit to record whether we have 2755 initialized it already. 2756 2757 When doing a dynamic link, we create a .rela.got 2758 relocation entry to initialize the value. This 2759 is done in the finish_dynamic_symbol routine. */ 2760 if ((off & 1) != 0) 2761 off &= ~1; 2762 else 2763 { 2764 bfd_put_32 (output_bfd, relocation, 2765 sgot->contents + off); 2766 h->got.offset |= 1; 2767 } 2768 } 2769 2770 relocation = sgot->output_offset + off; 2771 } 2772 else 2773 { 2774 bfd_vma off; 2775 bfd_byte *loc; 2776 2777 BFD_ASSERT (local_got_offsets != NULL 2778 && local_got_offsets[r_symndx] != (bfd_vma) -1); 2779 2780 off = local_got_offsets[r_symndx]; 2781 2782 /* The offset must always be a multiple of 4. We use 2783 the least significant bit to record whether we have 2784 already processed this entry. */ 2785 if ((off & 1) != 0) 2786 off &= ~1; 2787 else 2788 { 2789 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 2790 2791 if (bfd_link_pic (info)) 2792 { 2793 asection *srelgot; 2794 Elf_Internal_Rela outrel; 2795 2796 /* We need to generate a R_M32R_RELATIVE reloc 2797 for the dynamic linker. */ 2798 srelgot = bfd_get_linker_section (dynobj, 2799 ".rela.got"); 2800 BFD_ASSERT (srelgot != NULL); 2801 2802 outrel.r_offset = (sgot->output_section->vma 2803 + sgot->output_offset 2804 + off); 2805 outrel.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); 2806 outrel.r_addend = relocation; 2807 loc = srelgot->contents; 2808 loc += srelgot->reloc_count * sizeof (Elf32_External_Rela); 2809 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); 2810 ++srelgot->reloc_count; 2811 } 2812 2813 local_got_offsets[r_symndx] |= 1; 2814 } 2815 2816 relocation = sgot->output_offset + off; 2817 } 2818 if ((r_type == R_M32R_GOT16_HI_SLO) 2819 && ((relocation + rel->r_addend) & 0x8000)) 2820 rel->r_addend += 0x10000; 2821 2822 break; 2823 2824 case R_M32R_26_PLTREL: 2825 /* Relocation is to the entry for this symbol in the 2826 procedure linkage table. */ 2827 2828 /* The native assembler will generate a 26_PLTREL reloc 2829 for a local symbol if you assemble a call from one 2830 section to another when using -K pic. */ 2831 if (h == NULL) 2832 break; 2833 2834 if (h->forced_local) 2835 break; 2836 2837 if (h->plt.offset == (bfd_vma) -1) 2838 /* We didn't make a PLT entry for this symbol. This 2839 happens when statically linking PIC code, or when 2840 using -Bsymbolic. */ 2841 break; 2842 2843 relocation = (splt->output_section->vma 2844 + splt->output_offset 2845 + h->plt.offset); 2846 break; 2847 2848 case R_M32R_HI16_SLO_RELA: 2849 if ((relocation + rel->r_addend) & 0x8000) 2850 rel->r_addend += 0x10000; 2851 /* Fall through. */ 2852 2853 case R_M32R_16_RELA: 2854 case R_M32R_24_RELA: 2855 case R_M32R_32_RELA: 2856 case R_M32R_REL32: 2857 case R_M32R_10_PCREL_RELA: 2858 case R_M32R_18_PCREL_RELA: 2859 case R_M32R_26_PCREL_RELA: 2860 case R_M32R_HI16_ULO_RELA: 2861 case R_M32R_LO16_RELA: 2862 if (bfd_link_pic (info) 2863 && r_symndx != STN_UNDEF 2864 && (input_section->flags & SEC_ALLOC) != 0 2865 && (( r_type != R_M32R_10_PCREL_RELA 2866 && r_type != R_M32R_18_PCREL_RELA 2867 && r_type != R_M32R_26_PCREL_RELA 2868 && r_type != R_M32R_REL32) 2869 || (h != NULL 2870 && h->dynindx != -1 2871 && (! info->symbolic 2872 || !h->def_regular)))) 2873 { 2874 Elf_Internal_Rela outrel; 2875 bfd_boolean skip, relocate; 2876 bfd_byte *loc; 2877 2878 /* When generating a shared object, these relocations 2879 are copied into the output file to be resolved at run 2880 time. */ 2881 if (sreloc == NULL) 2882 { 2883 sreloc = _bfd_elf_get_dynamic_reloc_section 2884 (input_bfd, input_section, /*rela?*/ TRUE); 2885 if (sreloc == NULL) 2886 return FALSE; 2887 } 2888 2889 skip = FALSE; 2890 relocate = FALSE; 2891 2892 outrel.r_offset = _bfd_elf_section_offset (output_bfd, 2893 info, 2894 input_section, 2895 rel->r_offset); 2896 if (outrel.r_offset == (bfd_vma) -1) 2897 skip = TRUE; 2898 else if (outrel.r_offset == (bfd_vma) -2) 2899 skip = relocate = TRUE; 2900 outrel.r_offset += (input_section->output_section->vma 2901 + input_section->output_offset); 2902 2903 if (skip) 2904 memset (&outrel, 0, sizeof outrel); 2905 else if ( r_type == R_M32R_10_PCREL_RELA 2906 || r_type == R_M32R_18_PCREL_RELA 2907 || r_type == R_M32R_26_PCREL_RELA 2908 || r_type == R_M32R_REL32) 2909 { 2910 BFD_ASSERT (h != NULL && h->dynindx != -1); 2911 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 2912 outrel.r_addend = rel->r_addend; 2913 } 2914 else 2915 { 2916 /* h->dynindx may be -1 if this symbol was marked to 2917 become local. */ 2918 if (h == NULL 2919 || ((info->symbolic || h->dynindx == -1) 2920 && h->def_regular)) 2921 { 2922 relocate = TRUE; 2923 outrel.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); 2924 outrel.r_addend = relocation + rel->r_addend; 2925 } 2926 else 2927 { 2928 BFD_ASSERT (h->dynindx != -1); 2929 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 2930 outrel.r_addend = relocation + rel->r_addend; 2931 } 2932 } 2933 2934 loc = sreloc->contents; 2935 loc += sreloc->reloc_count * sizeof (Elf32_External_Rela); 2936 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); 2937 ++sreloc->reloc_count; 2938 2939 /* If this reloc is against an external symbol, we do 2940 not want to fiddle with the addend. Otherwise, we 2941 need to include the symbol value so that it becomes 2942 an addend for the dynamic reloc. */ 2943 if (! relocate) 2944 continue; 2945 break; 2946 } 2947 else if (r_type != R_M32R_10_PCREL_RELA) 2948 break; 2949 /* Fall through. */ 2950 2951 case (int) R_M32R_10_PCREL : 2952 r = m32r_elf_do_10_pcrel_reloc (input_bfd, howto, input_section, 2953 contents, offset, 2954 sec, relocation, addend); 2955 goto check_reloc; 2956 2957 case (int) R_M32R_HI16_SLO : 2958 case (int) R_M32R_HI16_ULO : 2959 { 2960 Elf_Internal_Rela *lorel; 2961 2962 /* We allow an arbitrary number of HI16 relocs before the 2963 LO16 reloc. This permits gcc to emit the HI and LO relocs 2964 itself. */ 2965 for (lorel = rel + 1; 2966 (lorel < relend 2967 && (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO 2968 || ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO)); 2969 lorel++) 2970 continue; 2971 if (lorel < relend 2972 && ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16) 2973 { 2974 m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel, 2975 contents, relocation + addend); 2976 r = bfd_reloc_ok; 2977 } 2978 else 2979 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 2980 contents, offset, 2981 relocation, addend); 2982 } 2983 2984 goto check_reloc; 2985 2986 case (int) R_M32R_SDA16_RELA: 2987 case (int) R_M32R_SDA16 : 2988 { 2989 const char *name; 2990 2991 BFD_ASSERT (sec != NULL); 2992 name = bfd_get_section_name (sec->owner, sec); 2993 2994 if ( strcmp (name, ".sdata") == 0 2995 || strcmp (name, ".sbss") == 0 2996 || strcmp (name, ".scommon") == 0) 2997 { 2998 bfd_vma sda_base; 2999 bfd *out_bfd = sec->output_section->owner; 3000 3001 r = m32r_elf_final_sda_base (out_bfd, info, 3002 &errmsg, 3003 &sda_base); 3004 if (r != bfd_reloc_ok) 3005 { 3006 ret = FALSE; 3007 goto check_reloc; 3008 } 3009 3010 /* At this point `relocation' contains the object's 3011 address. */ 3012 relocation -= sda_base; 3013 /* Now it contains the offset from _SDA_BASE_. */ 3014 } 3015 else 3016 { 3017 (*_bfd_error_handler) 3018 (_("%B: The target (%s) of an %s relocation is in the wrong section (%A)"), 3019 input_bfd, 3020 sec, 3021 sym_name, 3022 m32r_elf_howto_table[(int) r_type].name); 3023 /*bfd_set_error (bfd_error_bad_value); ??? why? */ 3024 ret = FALSE; 3025 continue; 3026 } 3027 } 3028 /* Fall through. */ 3029 3030 default : /* OLD_M32R_RELOC */ 3031 3032 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3033 contents, offset, 3034 relocation, addend); 3035 goto check_reloc; 3036 } 3037 3038 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3039 contents, rel->r_offset, 3040 relocation, rel->r_addend); 3041 3042 } 3043 3044 check_reloc: 3045 3046 if (r != bfd_reloc_ok) 3047 { 3048 /* FIXME: This should be generic enough to go in a utility. */ 3049 const char *name; 3050 3051 if (h != NULL) 3052 name = h->root.root.string; 3053 else 3054 { 3055 name = (bfd_elf_string_from_elf_section 3056 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 3057 if (name == NULL || *name == '\0') 3058 name = bfd_section_name (input_bfd, sec); 3059 } 3060 3061 if (errmsg != NULL) 3062 goto common_error; 3063 3064 switch (r) 3065 { 3066 case bfd_reloc_overflow: 3067 (*info->callbacks->reloc_overflow) 3068 (info, (h ? &h->root : NULL), name, howto->name, 3069 (bfd_vma) 0, input_bfd, input_section, offset); 3070 break; 3071 3072 case bfd_reloc_undefined: 3073 (*info->callbacks->undefined_symbol) 3074 (info, name, input_bfd, input_section, offset, TRUE); 3075 break; 3076 3077 case bfd_reloc_outofrange: 3078 errmsg = _("internal error: out of range error"); 3079 goto common_error; 3080 3081 case bfd_reloc_notsupported: 3082 errmsg = _("internal error: unsupported relocation error"); 3083 goto common_error; 3084 3085 case bfd_reloc_dangerous: 3086 errmsg = _("internal error: dangerous error"); 3087 goto common_error; 3088 3089 default: 3090 errmsg = _("internal error: unknown error"); 3091 /* fall through */ 3092 3093 common_error: 3094 (*info->callbacks->warning) (info, errmsg, name, input_bfd, 3095 input_section, offset); 3096 break; 3097 } 3098 } 3099 } 3100 3101 return ret; 3102 } 3103 3104 /* Finish up dynamic symbol handling. We set the contents of various 3105 dynamic sections here. */ 3106 3107 static bfd_boolean 3108 m32r_elf_finish_dynamic_symbol (bfd *output_bfd, 3109 struct bfd_link_info *info, 3110 struct elf_link_hash_entry *h, 3111 Elf_Internal_Sym *sym) 3112 { 3113 struct elf_m32r_link_hash_table *htab; 3114 bfd_byte *loc; 3115 3116 #ifdef DEBUG_PIC 3117 printf ("m32r_elf_finish_dynamic_symbol()\n"); 3118 #endif 3119 3120 htab = m32r_elf_hash_table (info); 3121 if (htab == NULL) 3122 return FALSE; 3123 3124 if (h->plt.offset != (bfd_vma) -1) 3125 { 3126 asection *splt; 3127 asection *sgot; 3128 asection *srela; 3129 3130 bfd_vma plt_index; 3131 bfd_vma got_offset; 3132 Elf_Internal_Rela rela; 3133 3134 /* This symbol has an entry in the procedure linkage table. Set 3135 it up. */ 3136 3137 BFD_ASSERT (h->dynindx != -1); 3138 3139 splt = htab->splt; 3140 sgot = htab->sgotplt; 3141 srela = htab->srelplt; 3142 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); 3143 3144 /* Get the index in the procedure linkage table which 3145 corresponds to this symbol. This is the index of this symbol 3146 in all the symbols for which we are making plt entries. The 3147 first entry in the procedure linkage table is reserved. */ 3148 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 3149 3150 /* Get the offset into the .got table of the entry that 3151 corresponds to this function. Each .got entry is 4 bytes. 3152 The first three are reserved. */ 3153 got_offset = (plt_index + 3) * 4; 3154 3155 /* Fill in the entry in the procedure linkage table. */ 3156 if (! bfd_link_pic (info)) 3157 { 3158 bfd_put_32 (output_bfd, 3159 (PLT_ENTRY_WORD0b 3160 + (((sgot->output_section->vma 3161 + sgot->output_offset 3162 + got_offset) >> 16) & 0xffff)), 3163 splt->contents + h->plt.offset); 3164 bfd_put_32 (output_bfd, 3165 (PLT_ENTRY_WORD1b 3166 + ((sgot->output_section->vma 3167 + sgot->output_offset 3168 + got_offset) & 0xffff)), 3169 splt->contents + h->plt.offset + 4); 3170 bfd_put_32 (output_bfd, PLT_ENTRY_WORD2, 3171 splt->contents + h->plt.offset + 8); 3172 bfd_put_32 (output_bfd, 3173 (PLT_ENTRY_WORD3 3174 + plt_index * sizeof (Elf32_External_Rela)), 3175 splt->contents + h->plt.offset + 12); 3176 bfd_put_32 (output_bfd, 3177 (PLT_ENTRY_WORD4 3178 + (((unsigned int) ((- (h->plt.offset + 16)) >> 2)) & 0xffffff)), 3179 splt->contents + h->plt.offset + 16); 3180 } 3181 else 3182 { 3183 bfd_put_32 (output_bfd, 3184 PLT_ENTRY_WORD0 + got_offset, 3185 splt->contents + h->plt.offset); 3186 bfd_put_32 (output_bfd, PLT_ENTRY_WORD1, 3187 splt->contents + h->plt.offset + 4); 3188 bfd_put_32 (output_bfd, PLT_ENTRY_WORD2, 3189 splt->contents + h->plt.offset + 8); 3190 bfd_put_32 (output_bfd, 3191 (PLT_ENTRY_WORD3 3192 + plt_index * sizeof (Elf32_External_Rela)), 3193 splt->contents + h->plt.offset + 12); 3194 bfd_put_32 (output_bfd, 3195 (PLT_ENTRY_WORD4 3196 + (((unsigned int) ((- (h->plt.offset + 16)) >> 2)) & 0xffffff)), 3197 splt->contents + h->plt.offset + 16); 3198 } 3199 3200 /* Fill in the entry in the global offset table. */ 3201 bfd_put_32 (output_bfd, 3202 (splt->output_section->vma 3203 + splt->output_offset 3204 + h->plt.offset 3205 + 12), /* same offset */ 3206 sgot->contents + got_offset); 3207 3208 /* Fill in the entry in the .rela.plt section. */ 3209 rela.r_offset = (sgot->output_section->vma 3210 + sgot->output_offset 3211 + got_offset); 3212 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_JMP_SLOT); 3213 rela.r_addend = 0; 3214 loc = srela->contents; 3215 loc += plt_index * sizeof (Elf32_External_Rela); 3216 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3217 3218 if (!h->def_regular) 3219 { 3220 /* Mark the symbol as undefined, rather than as defined in 3221 the .plt section. Leave the value alone. */ 3222 sym->st_shndx = SHN_UNDEF; 3223 } 3224 } 3225 3226 if (h->got.offset != (bfd_vma) -1) 3227 { 3228 asection *sgot; 3229 asection *srela; 3230 Elf_Internal_Rela rela; 3231 3232 /* This symbol has an entry in the global offset table. Set it 3233 up. */ 3234 3235 sgot = htab->sgot; 3236 srela = htab->srelgot; 3237 BFD_ASSERT (sgot != NULL && srela != NULL); 3238 3239 rela.r_offset = (sgot->output_section->vma 3240 + sgot->output_offset 3241 + (h->got.offset &~ 1)); 3242 3243 /* If this is a -Bsymbolic link, and the symbol is defined 3244 locally, we just want to emit a RELATIVE reloc. Likewise if 3245 the symbol was forced to be local because of a version file. 3246 The entry in the global offset table will already have been 3247 initialized in the relocate_section function. */ 3248 if (bfd_link_pic (info) 3249 && (info->symbolic 3250 || h->dynindx == -1 3251 || h->forced_local) 3252 && h->def_regular) 3253 { 3254 rela.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); 3255 rela.r_addend = (h->root.u.def.value 3256 + h->root.u.def.section->output_section->vma 3257 + h->root.u.def.section->output_offset); 3258 } 3259 else 3260 { 3261 BFD_ASSERT ((h->got.offset & 1) == 0); 3262 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); 3263 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_GLOB_DAT); 3264 rela.r_addend = 0; 3265 } 3266 3267 loc = srela->contents; 3268 loc += srela->reloc_count * sizeof (Elf32_External_Rela); 3269 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3270 ++srela->reloc_count; 3271 } 3272 3273 if (h->needs_copy) 3274 { 3275 asection *s; 3276 Elf_Internal_Rela rela; 3277 3278 /* This symbols needs a copy reloc. Set it up. */ 3279 3280 BFD_ASSERT (h->dynindx != -1 3281 && (h->root.type == bfd_link_hash_defined 3282 || h->root.type == bfd_link_hash_defweak)); 3283 3284 s = bfd_get_linker_section (htab->root.dynobj, ".rela.bss"); 3285 BFD_ASSERT (s != NULL); 3286 3287 rela.r_offset = (h->root.u.def.value 3288 + h->root.u.def.section->output_section->vma 3289 + h->root.u.def.section->output_offset); 3290 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_COPY); 3291 rela.r_addend = 0; 3292 loc = s->contents; 3293 loc += s->reloc_count * sizeof (Elf32_External_Rela); 3294 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3295 ++s->reloc_count; 3296 } 3297 3298 /* Mark some specially defined symbols as absolute. */ 3299 if (h == htab->root.hdynamic || h == htab->root.hgot) 3300 sym->st_shndx = SHN_ABS; 3301 3302 return TRUE; 3303 } 3304 3305 3306 /* Finish up the dynamic sections. */ 3307 3308 static bfd_boolean 3309 m32r_elf_finish_dynamic_sections (bfd *output_bfd, 3310 struct bfd_link_info *info) 3311 { 3312 struct elf_m32r_link_hash_table *htab; 3313 bfd *dynobj; 3314 asection *sdyn; 3315 asection *sgot; 3316 3317 #ifdef DEBUG_PIC 3318 printf ("m32r_elf_finish_dynamic_sections()\n"); 3319 #endif 3320 3321 htab = m32r_elf_hash_table (info); 3322 if (htab == NULL) 3323 return FALSE; 3324 3325 dynobj = htab->root.dynobj; 3326 3327 sgot = htab->sgotplt; 3328 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 3329 3330 if (htab->root.dynamic_sections_created) 3331 { 3332 asection *splt; 3333 Elf32_External_Dyn *dyncon, *dynconend; 3334 3335 BFD_ASSERT (sgot != NULL && sdyn != NULL); 3336 3337 dyncon = (Elf32_External_Dyn *) sdyn->contents; 3338 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 3339 3340 for (; dyncon < dynconend; dyncon++) 3341 { 3342 Elf_Internal_Dyn dyn; 3343 asection *s; 3344 3345 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 3346 3347 switch (dyn.d_tag) 3348 { 3349 default: 3350 break; 3351 3352 case DT_PLTGOT: 3353 s = htab->sgotplt; 3354 goto get_vma; 3355 case DT_JMPREL: 3356 s = htab->srelplt; 3357 get_vma: 3358 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 3359 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3360 break; 3361 3362 case DT_PLTRELSZ: 3363 s = htab->srelplt; 3364 dyn.d_un.d_val = s->size; 3365 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3366 break; 3367 3368 case DT_RELASZ: 3369 /* My reading of the SVR4 ABI indicates that the 3370 procedure linkage table relocs (DT_JMPREL) should be 3371 included in the overall relocs (DT_RELA). This is 3372 what Solaris does. However, UnixWare can not handle 3373 that case. Therefore, we override the DT_RELASZ entry 3374 here to make it not include the JMPREL relocs. Since 3375 the linker script arranges for .rela.plt to follow all 3376 other relocation sections, we don't have to worry 3377 about changing the DT_RELA entry. */ 3378 if (htab->srelplt != NULL) 3379 { 3380 s = htab->srelplt; 3381 dyn.d_un.d_val -= s->size; 3382 } 3383 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3384 break; 3385 } 3386 } 3387 3388 /* Fill in the first entry in the procedure linkage table. */ 3389 splt = htab->splt; 3390 if (splt && splt->size > 0) 3391 { 3392 if (bfd_link_pic (info)) 3393 { 3394 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents); 3395 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4); 3396 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8); 3397 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12); 3398 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16); 3399 } 3400 else 3401 { 3402 unsigned long addr; 3403 /* addr = .got + 4 */ 3404 addr = sgot->output_section->vma + sgot->output_offset + 4; 3405 bfd_put_32 (output_bfd, 3406 PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), 3407 splt->contents); 3408 bfd_put_32 (output_bfd, 3409 PLT0_ENTRY_WORD1 | (addr & 0xffff), 3410 splt->contents + 4); 3411 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); 3412 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); 3413 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); 3414 } 3415 3416 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 3417 PLT_ENTRY_SIZE; 3418 } 3419 } 3420 3421 /* Fill in the first three entries in the global offset table. */ 3422 if (sgot && sgot->size > 0) 3423 { 3424 if (sdyn == NULL) 3425 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 3426 else 3427 bfd_put_32 (output_bfd, 3428 sdyn->output_section->vma + sdyn->output_offset, 3429 sgot->contents); 3430 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); 3431 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); 3432 3433 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 3434 } 3435 3436 return TRUE; 3437 } 3438 3439 3440 /* Set the right machine number. */ 3442 3443 static bfd_boolean 3444 m32r_elf_object_p (bfd *abfd) 3445 { 3446 switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH) 3447 { 3448 default: 3449 case E_M32R_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32r); break; 3450 case E_M32RX_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32rx); break; 3451 case E_M32R2_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32r2); break; 3452 } 3453 return TRUE; 3454 } 3455 3456 /* Store the machine number in the flags field. */ 3457 3458 static void 3459 m32r_elf_final_write_processing (bfd *abfd, 3460 bfd_boolean linker ATTRIBUTE_UNUSED) 3461 { 3462 unsigned long val; 3463 3464 switch (bfd_get_mach (abfd)) 3465 { 3466 default: 3467 case bfd_mach_m32r: val = E_M32R_ARCH; break; 3468 case bfd_mach_m32rx: val = E_M32RX_ARCH; break; 3469 case bfd_mach_m32r2: val = E_M32R2_ARCH; break; 3470 } 3471 3472 elf_elfheader (abfd)->e_flags &=~ EF_M32R_ARCH; 3473 elf_elfheader (abfd)->e_flags |= val; 3474 } 3475 3476 /* Function to keep M32R specific file flags. */ 3477 3478 static bfd_boolean 3479 m32r_elf_set_private_flags (bfd *abfd, flagword flags) 3480 { 3481 BFD_ASSERT (!elf_flags_init (abfd) 3482 || elf_elfheader (abfd)->e_flags == flags); 3483 3484 elf_elfheader (abfd)->e_flags = flags; 3485 elf_flags_init (abfd) = TRUE; 3486 return TRUE; 3487 } 3488 3489 /* Merge backend specific data from an object file to the output 3490 object file when linking. */ 3491 3492 static bfd_boolean 3493 m32r_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 3494 { 3495 flagword out_flags; 3496 flagword in_flags; 3497 3498 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour 3499 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 3500 return TRUE; 3501 3502 in_flags = elf_elfheader (ibfd)->e_flags; 3503 out_flags = elf_elfheader (obfd)->e_flags; 3504 3505 if (! elf_flags_init (obfd)) 3506 { 3507 /* If the input is the default architecture then do not 3508 bother setting the flags for the output architecture, 3509 instead allow future merges to do this. If no future 3510 merges ever set these flags then they will retain their 3511 unitialised values, which surprise surprise, correspond 3512 to the default values. */ 3513 if (bfd_get_arch_info (ibfd)->the_default) 3514 return TRUE; 3515 3516 elf_flags_init (obfd) = TRUE; 3517 elf_elfheader (obfd)->e_flags = in_flags; 3518 3519 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) 3520 && bfd_get_arch_info (obfd)->the_default) 3521 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), 3522 bfd_get_mach (ibfd)); 3523 3524 return TRUE; 3525 } 3526 3527 /* Check flag compatibility. */ 3528 if (in_flags == out_flags) 3529 return TRUE; 3530 3531 if ((in_flags & EF_M32R_ARCH) != (out_flags & EF_M32R_ARCH)) 3532 { 3533 if ( ((in_flags & EF_M32R_ARCH) != E_M32R_ARCH) 3534 || ((out_flags & EF_M32R_ARCH) == E_M32R_ARCH) 3535 || ((in_flags & EF_M32R_ARCH) == E_M32R2_ARCH)) 3536 { 3537 (*_bfd_error_handler) 3538 (_("%B: Instruction set mismatch with previous modules"), ibfd); 3539 3540 bfd_set_error (bfd_error_bad_value); 3541 return FALSE; 3542 } 3543 } 3544 3545 return TRUE; 3546 } 3547 3548 /* Display the flags field. */ 3549 3550 static bfd_boolean 3551 m32r_elf_print_private_bfd_data (bfd *abfd, void * ptr) 3552 { 3553 FILE * file = (FILE *) ptr; 3554 3555 BFD_ASSERT (abfd != NULL && ptr != NULL); 3556 3557 _bfd_elf_print_private_bfd_data (abfd, ptr); 3558 3559 fprintf (file, _("private flags = %lx"), elf_elfheader (abfd)->e_flags); 3560 3561 switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH) 3562 { 3563 default: 3564 case E_M32R_ARCH: fprintf (file, _(": m32r instructions")); break; 3565 case E_M32RX_ARCH: fprintf (file, _(": m32rx instructions")); break; 3566 case E_M32R2_ARCH: fprintf (file, _(": m32r2 instructions")); break; 3567 } 3568 3569 fputc ('\n', file); 3570 3571 return TRUE; 3572 } 3573 3574 static asection * 3575 m32r_elf_gc_mark_hook (asection *sec, 3576 struct bfd_link_info *info, 3577 Elf_Internal_Rela *rel, 3578 struct elf_link_hash_entry *h, 3579 Elf_Internal_Sym *sym) 3580 { 3581 if (h != NULL) 3582 switch (ELF32_R_TYPE (rel->r_info)) 3583 { 3584 case R_M32R_GNU_VTINHERIT: 3585 case R_M32R_GNU_VTENTRY: 3586 case R_M32R_RELA_GNU_VTINHERIT: 3587 case R_M32R_RELA_GNU_VTENTRY: 3588 return NULL; 3589 } 3590 3591 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 3592 } 3593 3594 static bfd_boolean 3595 m32r_elf_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, 3596 struct bfd_link_info *info ATTRIBUTE_UNUSED, 3597 asection *sec ATTRIBUTE_UNUSED, 3598 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) 3599 { 3600 /* Update the got entry reference counts for the section being removed. */ 3601 Elf_Internal_Shdr *symtab_hdr; 3602 struct elf_link_hash_entry **sym_hashes; 3603 bfd_signed_vma *local_got_refcounts; 3604 const Elf_Internal_Rela *rel, *relend; 3605 3606 if (bfd_link_relocatable (info)) 3607 return TRUE; 3608 3609 elf_section_data (sec)->local_dynrel = NULL; 3610 3611 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 3612 sym_hashes = elf_sym_hashes (abfd); 3613 local_got_refcounts = elf_local_got_refcounts (abfd); 3614 3615 relend = relocs + sec->reloc_count; 3616 for (rel = relocs; rel < relend; rel++) 3617 { 3618 unsigned long r_symndx; 3619 struct elf_link_hash_entry *h = NULL; 3620 3621 r_symndx = ELF32_R_SYM (rel->r_info); 3622 if (r_symndx >= symtab_hdr->sh_info) 3623 { 3624 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3625 while (h->root.type == bfd_link_hash_indirect 3626 || h->root.type == bfd_link_hash_warning) 3627 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3628 } 3629 3630 switch (ELF32_R_TYPE (rel->r_info)) 3631 { 3632 case R_M32R_GOT16_HI_ULO: 3633 case R_M32R_GOT16_HI_SLO: 3634 case R_M32R_GOT16_LO: 3635 case R_M32R_GOTOFF: 3636 case R_M32R_GOTOFF_HI_ULO: 3637 case R_M32R_GOTOFF_HI_SLO: 3638 case R_M32R_GOTOFF_LO: 3639 case R_M32R_GOT24: 3640 case R_M32R_GOTPC_HI_ULO: 3641 case R_M32R_GOTPC_HI_SLO: 3642 case R_M32R_GOTPC_LO: 3643 case R_M32R_GOTPC24: 3644 if (h != NULL) 3645 { 3646 if (h->got.refcount > 0) 3647 h->got.refcount--; 3648 } 3649 else 3650 { 3651 if (local_got_refcounts && local_got_refcounts[r_symndx] > 0) 3652 local_got_refcounts[r_symndx]--; 3653 } 3654 break; 3655 3656 case R_M32R_16_RELA: 3657 case R_M32R_24_RELA: 3658 case R_M32R_32_RELA: 3659 case R_M32R_REL32: 3660 case R_M32R_HI16_ULO_RELA: 3661 case R_M32R_HI16_SLO_RELA: 3662 case R_M32R_LO16_RELA: 3663 case R_M32R_SDA16_RELA: 3664 case R_M32R_10_PCREL_RELA: 3665 case R_M32R_18_PCREL_RELA: 3666 case R_M32R_26_PCREL_RELA: 3667 if (h != NULL) 3668 { 3669 struct elf_m32r_link_hash_entry *eh; 3670 struct elf_m32r_dyn_relocs **pp; 3671 struct elf_m32r_dyn_relocs *p; 3672 3673 if (!bfd_link_pic (info) && h->plt.refcount > 0) 3674 h->plt.refcount -= 1; 3675 3676 eh = (struct elf_m32r_link_hash_entry *) h; 3677 3678 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 3679 if (p->sec == sec) 3680 { 3681 if ( ELF32_R_TYPE (rel->r_info) == R_M32R_26_PCREL_RELA 3682 || ELF32_R_TYPE (rel->r_info) == R_M32R_18_PCREL_RELA 3683 || ELF32_R_TYPE (rel->r_info) == R_M32R_10_PCREL_RELA 3684 || ELF32_R_TYPE (rel->r_info) == R_M32R_REL32) 3685 p->pc_count -= 1; 3686 p->count -= 1; 3687 if (p->count == 0) 3688 *pp = p->next; 3689 break; 3690 } 3691 } 3692 break; 3693 3694 case R_M32R_26_PLTREL: 3695 if (h != NULL) 3696 { 3697 if (h->plt.refcount > 0) 3698 h->plt.refcount--; 3699 } 3700 break; 3701 3702 default: 3703 break; 3704 } 3705 } 3706 3707 return TRUE; 3708 } 3709 3710 /* Look through the relocs for a section during the first phase. 3711 Since we don't do .gots or .plts, we just need to consider the 3712 virtual table relocs for gc. */ 3713 3714 static bfd_boolean 3715 m32r_elf_check_relocs (bfd *abfd, 3716 struct bfd_link_info *info, 3717 asection *sec, 3718 const Elf_Internal_Rela *relocs) 3719 { 3720 Elf_Internal_Shdr *symtab_hdr; 3721 struct elf_link_hash_entry **sym_hashes; 3722 const Elf_Internal_Rela *rel; 3723 const Elf_Internal_Rela *rel_end; 3724 struct elf_m32r_link_hash_table *htab; 3725 bfd *dynobj; 3726 asection *sreloc; 3727 3728 if (bfd_link_relocatable (info)) 3729 return TRUE; 3730 3731 sreloc = NULL; 3732 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 3733 sym_hashes = elf_sym_hashes (abfd); 3734 3735 htab = m32r_elf_hash_table (info); 3736 if (htab == NULL) 3737 return FALSE; 3738 3739 dynobj = htab->root.dynobj; 3740 3741 rel_end = relocs + sec->reloc_count; 3742 for (rel = relocs; rel < rel_end; rel++) 3743 { 3744 int r_type; 3745 struct elf_link_hash_entry *h; 3746 unsigned long r_symndx; 3747 3748 r_symndx = ELF32_R_SYM (rel->r_info); 3749 r_type = ELF32_R_TYPE (rel->r_info); 3750 if (r_symndx < symtab_hdr->sh_info) 3751 h = NULL; 3752 else 3753 { 3754 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3755 while (h->root.type == bfd_link_hash_indirect 3756 || h->root.type == bfd_link_hash_warning) 3757 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3758 3759 /* PR15323, ref flags aren't set for references in the same 3760 object. */ 3761 h->root.non_ir_ref = 1; 3762 } 3763 3764 /* Some relocs require a global offset table. */ 3765 if (htab->sgot == NULL) 3766 { 3767 switch (r_type) 3768 { 3769 case R_M32R_GOT16_HI_ULO: 3770 case R_M32R_GOT16_HI_SLO: 3771 case R_M32R_GOTOFF: 3772 case R_M32R_GOTOFF_HI_ULO: 3773 case R_M32R_GOTOFF_HI_SLO: 3774 case R_M32R_GOTOFF_LO: 3775 case R_M32R_GOT16_LO: 3776 case R_M32R_GOTPC24: 3777 case R_M32R_GOTPC_HI_ULO: 3778 case R_M32R_GOTPC_HI_SLO: 3779 case R_M32R_GOTPC_LO: 3780 case R_M32R_GOT24: 3781 if (dynobj == NULL) 3782 htab->root.dynobj = dynobj = abfd; 3783 if (! create_got_section (dynobj, info)) 3784 return FALSE; 3785 break; 3786 3787 default: 3788 break; 3789 } 3790 } 3791 3792 switch (r_type) 3793 { 3794 case R_M32R_GOT16_HI_ULO: 3795 case R_M32R_GOT16_HI_SLO: 3796 case R_M32R_GOT16_LO: 3797 case R_M32R_GOT24: 3798 3799 if (h != NULL) 3800 h->got.refcount += 1; 3801 else 3802 { 3803 bfd_signed_vma *local_got_refcounts; 3804 3805 /* This is a global offset table entry for a local 3806 symbol. */ 3807 local_got_refcounts = elf_local_got_refcounts (abfd); 3808 if (local_got_refcounts == NULL) 3809 { 3810 bfd_size_type size; 3811 3812 size = symtab_hdr->sh_info; 3813 size *= sizeof (bfd_signed_vma); 3814 local_got_refcounts = bfd_zalloc (abfd, size); 3815 if (local_got_refcounts == NULL) 3816 return FALSE; 3817 elf_local_got_refcounts (abfd) = local_got_refcounts; 3818 } 3819 local_got_refcounts[r_symndx] += 1; 3820 } 3821 break; 3822 3823 case R_M32R_26_PLTREL: 3824 /* This symbol requires a procedure linkage table entry. We 3825 actually build the entry in adjust_dynamic_symbol, 3826 because this might be a case of linking PIC code without 3827 linking in any dynamic objects, in which case we don't 3828 need to generate a procedure linkage table after all. */ 3829 3830 /* If this is a local symbol, we resolve it directly without 3831 creating a procedure linkage table entry. */ 3832 if (h == NULL) 3833 continue; 3834 3835 if (h->forced_local) 3836 break; 3837 3838 h->needs_plt = 1; 3839 h->plt.refcount += 1; 3840 break; 3841 3842 case R_M32R_16_RELA: 3843 case R_M32R_24_RELA: 3844 case R_M32R_32_RELA: 3845 case R_M32R_REL32: 3846 case R_M32R_HI16_ULO_RELA: 3847 case R_M32R_HI16_SLO_RELA: 3848 case R_M32R_LO16_RELA: 3849 case R_M32R_SDA16_RELA: 3850 case R_M32R_10_PCREL_RELA: 3851 case R_M32R_18_PCREL_RELA: 3852 case R_M32R_26_PCREL_RELA: 3853 3854 if (h != NULL && !bfd_link_pic (info)) 3855 { 3856 h->non_got_ref = 1; 3857 h->plt.refcount += 1; 3858 } 3859 3860 /* If we are creating a shared library, and this is a reloc 3861 against a global symbol, or a non PC relative reloc 3862 against a local symbol, then we need to copy the reloc 3863 into the shared library. However, if we are linking with 3864 -Bsymbolic, we do not need to copy a reloc against a 3865 global symbol which is defined in an object we are 3866 including in the link (i.e., DEF_REGULAR is set). At 3867 this point we have not seen all the input files, so it is 3868 possible that DEF_REGULAR is not set now but will be set 3869 later (it is never cleared). We account for that 3870 possibility below by storing information in the 3871 dyn_relocs field of the hash table entry. A similar 3872 situation occurs when creating shared libraries and symbol 3873 visibility changes render the symbol local. 3874 3875 If on the other hand, we are creating an executable, we 3876 may need to keep relocations for symbols satisfied by a 3877 dynamic library if we manage to avoid copy relocs for the 3878 symbol. */ 3879 if ((bfd_link_pic (info) 3880 && (sec->flags & SEC_ALLOC) != 0 3881 && (( r_type != R_M32R_26_PCREL_RELA 3882 && r_type != R_M32R_18_PCREL_RELA 3883 && r_type != R_M32R_10_PCREL_RELA 3884 && r_type != R_M32R_REL32) 3885 || (h != NULL 3886 && (! info->symbolic 3887 || h->root.type == bfd_link_hash_defweak 3888 || !h->def_regular)))) 3889 || (!bfd_link_pic (info) 3890 && (sec->flags & SEC_ALLOC) != 0 3891 && h != NULL 3892 && (h->root.type == bfd_link_hash_defweak 3893 || !h->def_regular))) 3894 { 3895 struct elf_m32r_dyn_relocs *p; 3896 struct elf_m32r_dyn_relocs **head; 3897 3898 if (dynobj == NULL) 3899 htab->root.dynobj = dynobj = abfd; 3900 3901 /* When creating a shared object, we must copy these 3902 relocs into the output file. We create a reloc 3903 section in dynobj and make room for the reloc. */ 3904 if (sreloc == NULL) 3905 { 3906 sreloc = _bfd_elf_make_dynamic_reloc_section 3907 (sec, dynobj, 2, abfd, /*rela?*/ TRUE); 3908 3909 if (sreloc == NULL) 3910 return FALSE; 3911 } 3912 3913 /* If this is a global symbol, we count the number of 3914 relocations we need for this symbol. */ 3915 if (h != NULL) 3916 head = &((struct elf_m32r_link_hash_entry *) h)->dyn_relocs; 3917 else 3918 { 3919 /* Track dynamic relocs needed for local syms too. */ 3920 asection *s; 3921 void *vpp; 3922 Elf_Internal_Sym *isym; 3923 3924 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 3925 abfd, r_symndx); 3926 if (isym == NULL) 3927 return FALSE; 3928 3929 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 3930 if (s == NULL) 3931 s = sec; 3932 3933 vpp = &elf_section_data (s)->local_dynrel; 3934 head = (struct elf_m32r_dyn_relocs **) vpp; 3935 } 3936 3937 p = *head; 3938 if (p == NULL || p->sec != sec) 3939 { 3940 bfd_size_type amt = sizeof (*p); 3941 3942 p = bfd_alloc (dynobj, amt); 3943 if (p == NULL) 3944 return FALSE; 3945 p->next = *head; 3946 *head = p; 3947 p->sec = sec; 3948 p->count = 0; 3949 p->pc_count = 0; 3950 } 3951 3952 p->count += 1; 3953 if ( ELF32_R_TYPE (rel->r_info) == R_M32R_26_PCREL_RELA 3954 || ELF32_R_TYPE (rel->r_info) == R_M32R_18_PCREL_RELA 3955 || ELF32_R_TYPE (rel->r_info) == R_M32R_10_PCREL_RELA 3956 || ELF32_R_TYPE (rel->r_info) == R_M32R_REL32) 3957 p->pc_count += 1; 3958 } 3959 break; 3960 3961 /* This relocation describes the C++ object vtable hierarchy. 3962 Reconstruct it for later use during GC. */ 3963 case R_M32R_RELA_GNU_VTINHERIT: 3964 case R_M32R_GNU_VTINHERIT: 3965 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 3966 return FALSE; 3967 break; 3968 3969 /* This relocation describes which C++ vtable entries are actually 3970 used. Record for later use during GC. */ 3971 case R_M32R_GNU_VTENTRY: 3972 BFD_ASSERT (h != NULL); 3973 if (h != NULL 3974 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) 3975 return FALSE; 3976 break; 3977 case R_M32R_RELA_GNU_VTENTRY: 3978 BFD_ASSERT (h != NULL); 3979 if (h != NULL 3980 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 3981 return FALSE; 3982 break; 3983 } 3984 } 3985 3986 return TRUE; 3987 } 3988 3989 static const struct bfd_elf_special_section m32r_elf_special_sections[] = 3990 { 3991 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 3992 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 3993 { NULL, 0, 0, 0, 0 } 3994 }; 3995 3996 static enum elf_reloc_type_class 3997 m32r_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 3998 const asection *rel_sec ATTRIBUTE_UNUSED, 3999 const Elf_Internal_Rela *rela) 4000 { 4001 switch ((int) ELF32_R_TYPE (rela->r_info)) 4002 { 4003 case R_M32R_RELATIVE: return reloc_class_relative; 4004 case R_M32R_JMP_SLOT: return reloc_class_plt; 4005 case R_M32R_COPY: return reloc_class_copy; 4006 default: return reloc_class_normal; 4007 } 4008 } 4009 4010 #define ELF_ARCH bfd_arch_m32r 4012 #define ELF_TARGET_ID M32R_ELF_DATA 4013 #define ELF_MACHINE_CODE EM_M32R 4014 #define ELF_MACHINE_ALT1 EM_CYGNUS_M32R 4015 #define ELF_MAXPAGESIZE 0x1 /* Explicitly requested by Mitsubishi. */ 4016 4017 #define TARGET_BIG_SYM m32r_elf32_vec 4018 #define TARGET_BIG_NAME "elf32-m32r" 4019 #define TARGET_LITTLE_SYM m32r_elf32_le_vec 4020 #define TARGET_LITTLE_NAME "elf32-m32rle" 4021 4022 #define elf_info_to_howto m32r_info_to_howto 4023 #define elf_info_to_howto_rel m32r_info_to_howto_rel 4024 #define elf_backend_section_from_bfd_section _bfd_m32r_elf_section_from_bfd_section 4025 #define elf_backend_symbol_processing _bfd_m32r_elf_symbol_processing 4026 #define elf_backend_add_symbol_hook m32r_elf_add_symbol_hook 4027 #define elf_backend_relocate_section m32r_elf_relocate_section 4028 #define elf_backend_gc_mark_hook m32r_elf_gc_mark_hook 4029 #define elf_backend_gc_sweep_hook m32r_elf_gc_sweep_hook 4030 #define elf_backend_check_relocs m32r_elf_check_relocs 4031 4032 #define elf_backend_create_dynamic_sections m32r_elf_create_dynamic_sections 4033 #define bfd_elf32_bfd_link_hash_table_create m32r_elf_link_hash_table_create 4034 #define elf_backend_size_dynamic_sections m32r_elf_size_dynamic_sections 4035 #define elf_backend_omit_section_dynsym \ 4036 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) 4037 #define elf_backend_finish_dynamic_sections m32r_elf_finish_dynamic_sections 4038 #define elf_backend_adjust_dynamic_symbol m32r_elf_adjust_dynamic_symbol 4039 #define elf_backend_finish_dynamic_symbol m32r_elf_finish_dynamic_symbol 4040 #define elf_backend_reloc_type_class m32r_elf_reloc_type_class 4041 #define elf_backend_copy_indirect_symbol m32r_elf_copy_indirect_symbol 4042 4043 #define elf_backend_can_gc_sections 1 4044 /*#if !USE_REL 4045 #define elf_backend_rela_normal 1 4046 #endif*/ 4047 #define elf_backend_can_refcount 1 4048 #define elf_backend_want_got_plt 1 4049 #define elf_backend_plt_readonly 1 4050 #define elf_backend_want_plt_sym 0 4051 #define elf_backend_got_header_size 12 4052 4053 #define elf_backend_may_use_rel_p 1 4054 #ifdef USE_M32R_OLD_RELOC 4055 #define elf_backend_default_use_rela_p 0 4056 #define elf_backend_may_use_rela_p 0 4057 #else 4058 #define elf_backend_default_use_rela_p 1 4059 #define elf_backend_may_use_rela_p 1 4060 #endif 4061 4062 #define elf_backend_object_p m32r_elf_object_p 4063 #define elf_backend_final_write_processing m32r_elf_final_write_processing 4064 #define bfd_elf32_bfd_merge_private_bfd_data m32r_elf_merge_private_bfd_data 4065 #define bfd_elf32_bfd_set_private_flags m32r_elf_set_private_flags 4066 #define bfd_elf32_bfd_print_private_bfd_data m32r_elf_print_private_bfd_data 4067 #define elf_backend_special_sections m32r_elf_special_sections 4068 4069 #include "elf32-target.h" 4070 4071 #undef ELF_MAXPAGESIZE 4072 #define ELF_MAXPAGESIZE 0x1000 4073 4074 #undef TARGET_BIG_SYM 4075 #define TARGET_BIG_SYM m32r_elf32_linux_vec 4076 #undef TARGET_BIG_NAME 4077 #define TARGET_BIG_NAME "elf32-m32r-linux" 4078 #undef TARGET_LITTLE_SYM 4079 #define TARGET_LITTLE_SYM m32r_elf32_linux_le_vec 4080 #undef TARGET_LITTLE_NAME 4081 #define TARGET_LITTLE_NAME "elf32-m32rle-linux" 4082 #undef elf32_bed 4083 #define elf32_bed elf32_m32r_lin_bed 4084 4085 #include "elf32-target.h" 4086 4087
