1 /* M32R-specific support for 32-bit ELF. 2 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 3 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 20 MA 02110-1301, USA. */ 21 22 #include "sysdep.h" 23 #include "bfd.h" 24 #include "libbfd.h" 25 #include "elf-bfd.h" 26 #include "elf/m32r.h" 27 28 #define NOP_INSN 0x7000 29 #define MAKE_PARALLEL(insn) ((insn) | 0x8000) 30 31 /* Use REL instead of RELA to save space. 32 This only saves space in libraries and object files, but perhaps 33 relocs will be put in ROM? All in all though, REL relocs are a pain 34 to work with. */ 35 /* #define USE_REL 1 36 37 #ifndef USE_REL 38 #define USE_REL 0 39 #endif */ 40 /* Use RELA. But use REL to link old objects for backwords compatibility. */ 41 42 /* Functions for the M32R ELF linker. */ 43 44 /* The name of the dynamic interpreter. This is put in the .interp 45 section. */ 46 47 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" 48 49 /* The nop opcode we use. */ 50 51 #define M32R_NOP 0x7000f000 52 53 #define PLT_EMPTY 0x10101010 /* RIE -> RIE */ 54 55 /* The size in bytes of an entry in the procedure linkage table. */ 56 57 #define PLT_ENTRY_SIZE 20 58 #define PLT_HEADER_SIZE 20 59 60 /* The first one entries in a procedure linkage table are reserved, 61 and the initial contents are unimportant (we zero them out). 62 Subsequent entries look like this. */ 63 64 #define PLT0_ENTRY_WORD0 0xd6c00000 /* seth r6, #high(.got+4) */ 65 #define PLT0_ENTRY_WORD1 0x86e60000 /* or3 r6, r6, #low(.got)+4) */ 66 #define PLT0_ENTRY_WORD2 0x24e626c6 /* ld r4, @r6+ -> ld r6, @r6 */ 67 #define PLT0_ENTRY_WORD3 0x1fc6f000 /* jmp r6 || pnop */ 68 #define PLT0_ENTRY_WORD4 PLT_EMPTY /* RIE -> RIE */ 69 70 #define PLT0_PIC_ENTRY_WORD0 0xa4cc0004 /* ld r4, @(4,r12) */ 71 #define PLT0_PIC_ENTRY_WORD1 0xa6cc0008 /* ld r6, @(8,r12) */ 72 #define PLT0_PIC_ENTRY_WORD2 0x1fc6f000 /* jmp r6 || nop */ 73 #define PLT0_PIC_ENTRY_WORD3 PLT_EMPTY /* RIE -> RIE */ 74 #define PLT0_PIC_ENTRY_WORD4 PLT_EMPTY /* RIE -> RIE */ 75 76 #define PLT_ENTRY_WORD0 0xe6000000 /* ld24 r6, .name_in_GOT */ 77 #define PLT_ENTRY_WORD1 0x06acf000 /* add r6, r12 || nop */ 78 #define PLT_ENTRY_WORD0b 0xd6c00000 /* seth r6, #high(.name_in_GOT) */ 79 #define PLT_ENTRY_WORD1b 0x86e60000 /* or3 r6, r6, #low(.name_in_GOT) */ 80 #define PLT_ENTRY_WORD2 0x26c61fc6 /* ld r6, @r6 -> jmp r6 */ 81 #define PLT_ENTRY_WORD3 0xe5000000 /* ld24 r5, $offset */ 82 #define PLT_ENTRY_WORD4 0xff000000 /* bra .plt0. */ 83 84 85 /* Utility to actually perform an R_M32R_10_PCREL reloc. */ 86 87 static bfd_reloc_status_type 88 m32r_elf_do_10_pcrel_reloc (bfd *abfd, 89 reloc_howto_type *howto, 90 asection *input_section, 91 bfd_byte *data, 92 bfd_vma offset, 93 asection *symbol_section ATTRIBUTE_UNUSED, 94 bfd_vma symbol_value, 95 bfd_vma addend) 96 { 97 bfd_signed_vma relocation; 98 unsigned long x; 99 bfd_reloc_status_type status; 100 101 /* Sanity check the address (offset in section). */ 102 if (offset > bfd_get_section_limit (abfd, input_section)) 103 return bfd_reloc_outofrange; 104 105 relocation = symbol_value + addend; 106 /* Make it pc relative. */ 107 relocation -= (input_section->output_section->vma 108 + input_section->output_offset); 109 /* These jumps mask off the lower two bits of the current address 110 before doing pcrel calculations. */ 111 relocation -= (offset & -(bfd_vma) 4); 112 113 if (relocation < -0x200 || relocation > 0x1ff) 114 status = bfd_reloc_overflow; 115 else 116 status = bfd_reloc_ok; 117 118 x = bfd_get_16 (abfd, data + offset); 119 relocation >>= howto->rightshift; 120 relocation <<= howto->bitpos; 121 x = (x & ~howto->dst_mask) | (((x & howto->src_mask) + relocation) & howto->dst_mask); 122 bfd_put_16 (abfd, (bfd_vma) x, data + offset); 123 124 return status; 125 } 126 127 /* Handle the R_M32R_10_PCREL reloc. */ 128 129 static bfd_reloc_status_type 130 m32r_elf_10_pcrel_reloc (bfd * abfd, 131 arelent * reloc_entry, 132 asymbol * symbol, 133 void * data, 134 asection * input_section, 135 bfd * output_bfd, 136 char ** error_message ATTRIBUTE_UNUSED) 137 { 138 /* This part is from bfd_elf_generic_reloc. */ 139 if (output_bfd != NULL 140 && (symbol->flags & BSF_SECTION_SYM) == 0 141 && (! reloc_entry->howto->partial_inplace 142 || reloc_entry->addend == 0)) 143 { 144 reloc_entry->address += input_section->output_offset; 145 return bfd_reloc_ok; 146 } 147 148 if (output_bfd != NULL) 149 /* FIXME: See bfd_perform_relocation. Is this right? */ 150 return bfd_reloc_continue; 151 152 return m32r_elf_do_10_pcrel_reloc (abfd, reloc_entry->howto, 153 input_section, 154 data, reloc_entry->address, 155 symbol->section, 156 (symbol->value 157 + symbol->section->output_section->vma 158 + symbol->section->output_offset), 159 reloc_entry->addend); 160 } 161 162 /* Do generic partial_inplace relocation. 163 This is a local replacement for bfd_elf_generic_reloc. */ 164 165 static bfd_reloc_status_type 166 m32r_elf_generic_reloc (bfd *input_bfd, 167 arelent *reloc_entry, 168 asymbol *symbol, 169 void * data, 170 asection *input_section, 171 bfd *output_bfd, 172 char **error_message ATTRIBUTE_UNUSED) 173 { 174 bfd_reloc_status_type ret; 175 bfd_vma relocation; 176 bfd_byte *inplace_address; 177 178 /* This part is from bfd_elf_generic_reloc. 179 If we're relocating, and this an external symbol, we don't want 180 to change anything. */ 181 if (output_bfd != NULL 182 && (symbol->flags & BSF_SECTION_SYM) == 0 183 && reloc_entry->addend == 0) 184 { 185 reloc_entry->address += input_section->output_offset; 186 return bfd_reloc_ok; 187 } 188 189 /* Now do the reloc in the usual way. 190 ??? It would be nice to call bfd_elf_generic_reloc here, 191 but we have partial_inplace set. bfd_elf_generic_reloc will 192 pass the handling back to bfd_install_relocation which will install 193 a section relative addend which is wrong. */ 194 195 /* Sanity check the address (offset in section). */ 196 if (reloc_entry->address > bfd_get_section_limit (input_bfd, input_section)) 197 return bfd_reloc_outofrange; 198 199 ret = bfd_reloc_ok; 200 if (bfd_is_und_section (symbol->section) 201 && output_bfd == NULL) 202 ret = bfd_reloc_undefined; 203 204 if (bfd_is_com_section (symbol->section) 205 || output_bfd != NULL) 206 relocation = 0; 207 else 208 relocation = symbol->value; 209 210 /* Only do this for a final link. */ 211 if (output_bfd == NULL) 212 { 213 relocation += symbol->section->output_section->vma; 214 relocation += symbol->section->output_offset; 215 } 216 217 relocation += reloc_entry->addend; 218 inplace_address = (bfd_byte *) data + reloc_entry->address; 219 220 #define DOIT(x) \ 221 x = ( (x & ~reloc_entry->howto->dst_mask) | \ 222 (((x & reloc_entry->howto->src_mask) + relocation) & \ 223 reloc_entry->howto->dst_mask)) 224 225 switch (reloc_entry->howto->size) 226 { 227 case 1: 228 { 229 short x = bfd_get_16 (input_bfd, inplace_address); 230 DOIT (x); 231 bfd_put_16 (input_bfd, (bfd_vma) x, inplace_address); 232 } 233 break; 234 case 2: 235 { 236 unsigned long x = bfd_get_32 (input_bfd, inplace_address); 237 DOIT (x); 238 bfd_put_32 (input_bfd, (bfd_vma)x , inplace_address); 239 } 240 break; 241 default: 242 BFD_ASSERT (0); 243 } 244 245 if (output_bfd != NULL) 246 reloc_entry->address += input_section->output_offset; 247 248 return ret; 249 } 250 251 /* Handle the R_M32R_SDA16 reloc. 252 This reloc is used to compute the address of objects in the small data area 253 and to perform loads and stores from that area. 254 The lower 16 bits are sign extended and added to the register specified 255 in the instruction, which is assumed to point to _SDA_BASE_. */ 256 257 static bfd_reloc_status_type 258 m32r_elf_sda16_reloc (bfd *abfd ATTRIBUTE_UNUSED, 259 arelent *reloc_entry, 260 asymbol *symbol, 261 void * data ATTRIBUTE_UNUSED, 262 asection *input_section, 263 bfd *output_bfd, 264 char **error_message ATTRIBUTE_UNUSED) 265 { 266 /* This part is from bfd_elf_generic_reloc. */ 267 if (output_bfd != NULL 268 && (symbol->flags & BSF_SECTION_SYM) == 0 269 && (! reloc_entry->howto->partial_inplace 270 || reloc_entry->addend == 0)) 271 { 272 reloc_entry->address += input_section->output_offset; 273 return bfd_reloc_ok; 274 } 275 276 if (output_bfd != NULL) 277 /* FIXME: See bfd_perform_relocation. Is this right? */ 278 return bfd_reloc_continue; 279 280 /* FIXME: not sure what to do here yet. But then again, the linker 281 may never call us. */ 282 abort (); 283 } 284 285 286 /* 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[] = 474 { 475 /* This reloc does nothing. */ 476 HOWTO (R_M32R_NONE, /* type */ 477 0, /* rightshift */ 478 2, /* size (0 = byte, 1 = short, 2 = long) */ 479 32, /* bitsize */ 480 FALSE, /* pc_relative */ 481 0, /* bitpos */ 482 complain_overflow_bitfield, /* complain_on_overflow */ 483 bfd_elf_generic_reloc, /* special_function */ 484 "R_M32R_NONE", /* name */ 485 FALSE, /* partial_inplace */ 486 0, /* src_mask */ 487 0, /* dst_mask */ 488 FALSE), /* pcrel_offset */ 489 490 /* A 16 bit absolute relocation. */ 491 HOWTO (R_M32R_16, /* type */ 492 0, /* rightshift */ 493 1, /* size (0 = byte, 1 = short, 2 = long) */ 494 16, /* bitsize */ 495 FALSE, /* pc_relative */ 496 0, /* bitpos */ 497 complain_overflow_bitfield, /* complain_on_overflow */ 498 m32r_elf_generic_reloc,/* special_function */ 499 "R_M32R_16", /* name */ 500 TRUE, /* partial_inplace */ 501 0xffff, /* src_mask */ 502 0xffff, /* dst_mask */ 503 FALSE), /* pcrel_offset */ 504 505 /* A 32 bit absolute relocation. */ 506 HOWTO (R_M32R_32, /* type */ 507 0, /* rightshift */ 508 2, /* size (0 = byte, 1 = short, 2 = long) */ 509 32, /* bitsize */ 510 FALSE, /* pc_relative */ 511 0, /* bitpos */ 512 complain_overflow_bitfield, /* complain_on_overflow */ 513 m32r_elf_generic_reloc,/* special_function */ 514 "R_M32R_32", /* name */ 515 TRUE, /* partial_inplace */ 516 0xffffffff, /* src_mask */ 517 0xffffffff, /* dst_mask */ 518 FALSE), /* pcrel_offset */ 519 520 /* A 24 bit address. */ 521 HOWTO (R_M32R_24, /* type */ 522 0, /* rightshift */ 523 2, /* size (0 = byte, 1 = short, 2 = long) */ 524 24, /* bitsize */ 525 FALSE, /* pc_relative */ 526 0, /* bitpos */ 527 complain_overflow_unsigned, /* complain_on_overflow */ 528 m32r_elf_generic_reloc,/* special_function */ 529 "R_M32R_24", /* name */ 530 TRUE, /* partial_inplace */ 531 0xffffff, /* src_mask */ 532 0xffffff, /* dst_mask */ 533 FALSE), /* pcrel_offset */ 534 535 /* An PC Relative 10-bit relocation, shifted by 2. 536 This reloc is complicated because relocations are relative to pc & -4. 537 i.e. branches in the right insn slot use the address of the left insn 538 slot for pc. */ 539 /* ??? It's not clear whether this should have partial_inplace set or not. 540 Branch relaxing in the assembler can store the addend in the insn, 541 and if bfd_install_relocation gets called the addend may get added 542 again. */ 543 HOWTO (R_M32R_10_PCREL, /* type */ 544 2, /* rightshift */ 545 1, /* size (0 = byte, 1 = short, 2 = long) */ 546 10, /* bitsize */ 547 TRUE, /* pc_relative */ 548 0, /* bitpos */ 549 complain_overflow_signed, /* complain_on_overflow */ 550 m32r_elf_10_pcrel_reloc, /* special_function */ 551 "R_M32R_10_PCREL", /* name */ 552 FALSE, /* partial_inplace */ 553 0xff, /* src_mask */ 554 0xff, /* dst_mask */ 555 TRUE), /* pcrel_offset */ 556 557 /* A relative 18 bit relocation, right shifted by 2. */ 558 HOWTO (R_M32R_18_PCREL, /* type */ 559 2, /* rightshift */ 560 2, /* size (0 = byte, 1 = short, 2 = long) */ 561 16, /* bitsize */ 562 TRUE, /* pc_relative */ 563 0, /* bitpos */ 564 complain_overflow_signed, /* complain_on_overflow */ 565 bfd_elf_generic_reloc, /* special_function */ 566 "R_M32R_18_PCREL", /* name */ 567 FALSE, /* partial_inplace */ 568 0xffff, /* src_mask */ 569 0xffff, /* dst_mask */ 570 TRUE), /* pcrel_offset */ 571 572 /* A relative 26 bit relocation, right shifted by 2. */ 573 /* ??? It's not clear whether this should have partial_inplace set or not. 574 Branch relaxing in the assembler can store the addend in the insn, 575 and if bfd_install_relocation gets called the addend may get added 576 again. */ 577 HOWTO (R_M32R_26_PCREL, /* type */ 578 2, /* rightshift */ 579 2, /* size (0 = byte, 1 = short, 2 = long) */ 580 26, /* bitsize */ 581 TRUE, /* pc_relative */ 582 0, /* bitpos */ 583 complain_overflow_signed, /* complain_on_overflow */ 584 bfd_elf_generic_reloc, /* special_function */ 585 "R_M32R_26_PCREL", /* name */ 586 FALSE, /* partial_inplace */ 587 0xffffff, /* src_mask */ 588 0xffffff, /* dst_mask */ 589 TRUE), /* pcrel_offset */ 590 591 /* High 16 bits of address when lower 16 is or'd in. */ 592 HOWTO (R_M32R_HI16_ULO, /* type */ 593 16, /* rightshift */ 594 2, /* size (0 = byte, 1 = short, 2 = long) */ 595 16, /* bitsize */ 596 FALSE, /* pc_relative */ 597 0, /* bitpos */ 598 complain_overflow_dont, /* complain_on_overflow */ 599 m32r_elf_hi16_reloc, /* special_function */ 600 "R_M32R_HI16_ULO", /* name */ 601 TRUE, /* partial_inplace */ 602 0x0000ffff, /* src_mask */ 603 0x0000ffff, /* dst_mask */ 604 FALSE), /* pcrel_offset */ 605 606 /* High 16 bits of address when lower 16 is added in. */ 607 HOWTO (R_M32R_HI16_SLO, /* type */ 608 16, /* rightshift */ 609 2, /* size (0 = byte, 1 = short, 2 = long) */ 610 16, /* bitsize */ 611 FALSE, /* pc_relative */ 612 0, /* bitpos */ 613 complain_overflow_dont, /* complain_on_overflow */ 614 m32r_elf_hi16_reloc, /* special_function */ 615 "R_M32R_HI16_SLO", /* name */ 616 TRUE, /* partial_inplace */ 617 0x0000ffff, /* src_mask */ 618 0x0000ffff, /* dst_mask */ 619 FALSE), /* pcrel_offset */ 620 621 /* Lower 16 bits of address. */ 622 HOWTO (R_M32R_LO16, /* type */ 623 0, /* rightshift */ 624 2, /* size (0 = byte, 1 = short, 2 = long) */ 625 16, /* bitsize */ 626 FALSE, /* pc_relative */ 627 0, /* bitpos */ 628 complain_overflow_dont, /* complain_on_overflow */ 629 m32r_elf_lo16_reloc, /* special_function */ 630 "R_M32R_LO16", /* name */ 631 TRUE, /* partial_inplace */ 632 0x0000ffff, /* src_mask */ 633 0x0000ffff, /* dst_mask */ 634 FALSE), /* pcrel_offset */ 635 636 /* Small data area 16 bits offset. */ 637 HOWTO (R_M32R_SDA16, /* type */ 638 0, /* rightshift */ 639 2, /* size (0 = byte, 1 = short, 2 = long) */ 640 16, /* bitsize */ 641 FALSE, /* pc_relative */ 642 0, /* bitpos */ 643 complain_overflow_signed, /* complain_on_overflow */ 644 m32r_elf_sda16_reloc, /* special_function */ 645 "R_M32R_SDA16", /* name */ 646 TRUE, /* partial_inplace */ /* FIXME: correct? */ 647 0x0000ffff, /* src_mask */ 648 0x0000ffff, /* dst_mask */ 649 FALSE), /* pcrel_offset */ 650 651 /* GNU extension to record C++ vtable hierarchy. */ 652 HOWTO (R_M32R_GNU_VTINHERIT, /* type */ 653 0, /* rightshift */ 654 2, /* size (0 = byte, 1 = short, 2 = long) */ 655 0, /* bitsize */ 656 FALSE, /* pc_relative */ 657 0, /* bitpos */ 658 complain_overflow_dont, /* complain_on_overflow */ 659 NULL, /* special_function */ 660 "R_M32R_GNU_VTINHERIT", /* name */ 661 FALSE, /* partial_inplace */ 662 0, /* src_mask */ 663 0, /* dst_mask */ 664 FALSE), /* pcrel_offset */ 665 666 /* GNU extension to record C++ vtable member usage. */ 667 HOWTO (R_M32R_GNU_VTENTRY, /* type */ 668 0, /* rightshift */ 669 2, /* size (0 = byte, 1 = short, 2 = long) */ 670 0, /* bitsize */ 671 FALSE, /* pc_relative */ 672 0, /* bitpos */ 673 complain_overflow_dont, /* complain_on_overflow */ 674 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 675 "R_M32R_GNU_VTENTRY", /* name */ 676 FALSE, /* partial_inplace */ 677 0, /* src_mask */ 678 0, /* dst_mask */ 679 FALSE), /* pcrel_offset */ 680 681 EMPTY_HOWTO (13), 682 EMPTY_HOWTO (14), 683 EMPTY_HOWTO (15), 684 EMPTY_HOWTO (16), 685 EMPTY_HOWTO (17), 686 EMPTY_HOWTO (18), 687 EMPTY_HOWTO (19), 688 EMPTY_HOWTO (20), 689 EMPTY_HOWTO (21), 690 EMPTY_HOWTO (22), 691 EMPTY_HOWTO (23), 692 EMPTY_HOWTO (24), 693 EMPTY_HOWTO (25), 694 EMPTY_HOWTO (26), 695 EMPTY_HOWTO (27), 696 EMPTY_HOWTO (28), 697 EMPTY_HOWTO (29), 698 EMPTY_HOWTO (30), 699 EMPTY_HOWTO (31), 700 EMPTY_HOWTO (32), 701 702 /* A 16 bit absolute relocation. */ 703 HOWTO (R_M32R_16_RELA, /* type */ 704 0, /* rightshift */ 705 1, /* size (0 = byte, 1 = short, 2 = long) */ 706 16, /* bitsize */ 707 FALSE, /* pc_relative */ 708 0, /* bitpos */ 709 complain_overflow_bitfield, /* complain_on_overflow */ 710 bfd_elf_generic_reloc, /* special_function */ 711 "R_M32R_16_RELA", /* name */ 712 FALSE, /* partial_inplace */ 713 0xffff, /* src_mask */ 714 0xffff, /* dst_mask */ 715 FALSE), /* pcrel_offset */ 716 717 /* A 32 bit absolute relocation. */ 718 HOWTO (R_M32R_32_RELA, /* type */ 719 0, /* rightshift */ 720 2, /* size (0 = byte, 1 = short, 2 = long) */ 721 32, /* bitsize */ 722 FALSE, /* pc_relative */ 723 0, /* bitpos */ 724 complain_overflow_bitfield, /* complain_on_overflow */ 725 bfd_elf_generic_reloc,/* special_function */ 726 "R_M32R_32_RELA", /* name */ 727 FALSE, /* partial_inplace */ 728 0xffffffff, /* src_mask */ 729 0xffffffff, /* dst_mask */ 730 FALSE), /* pcrel_offset */ 731 732 /* A 24 bit address. */ 733 HOWTO (R_M32R_24_RELA, /* type */ 734 0, /* rightshift */ 735 2, /* size (0 = byte, 1 = short, 2 = long) */ 736 24, /* bitsize */ 737 FALSE, /* pc_relative */ 738 0, /* bitpos */ 739 complain_overflow_unsigned, /* complain_on_overflow */ 740 bfd_elf_generic_reloc,/* special_function */ 741 "R_M32R_24_RELA", /* name */ 742 FALSE, /* partial_inplace */ 743 0xffffff, /* src_mask */ 744 0xffffff, /* dst_mask */ 745 FALSE), /* pcrel_offset */ 746 747 HOWTO (R_M32R_10_PCREL_RELA, /* type */ 748 2, /* rightshift */ 749 1, /* size (0 = byte, 1 = short, 2 = long) */ 750 10, /* bitsize */ 751 TRUE, /* pc_relative */ 752 0, /* bitpos */ 753 complain_overflow_signed, /* complain_on_overflow */ 754 m32r_elf_10_pcrel_reloc, /* special_function */ 755 "R_M32R_10_PCREL_RELA",/* name */ 756 FALSE, /* partial_inplace */ 757 0xff, /* src_mask */ 758 0xff, /* dst_mask */ 759 TRUE), /* pcrel_offset */ 760 761 /* A relative 18 bit relocation, right shifted by 2. */ 762 HOWTO (R_M32R_18_PCREL_RELA, /* type */ 763 2, /* rightshift */ 764 2, /* size (0 = byte, 1 = short, 2 = long) */ 765 16, /* bitsize */ 766 TRUE, /* pc_relative */ 767 0, /* bitpos */ 768 complain_overflow_signed, /* complain_on_overflow */ 769 bfd_elf_generic_reloc, /* special_function */ 770 "R_M32R_18_PCREL_RELA",/* name */ 771 FALSE, /* partial_inplace */ 772 0xffff, /* src_mask */ 773 0xffff, /* dst_mask */ 774 TRUE), /* pcrel_offset */ 775 776 /* A relative 26 bit relocation, right shifted by 2. */ 777 HOWTO (R_M32R_26_PCREL_RELA, /* type */ 778 2, /* rightshift */ 779 2, /* size (0 = byte, 1 = short, 2 = long) */ 780 26, /* bitsize */ 781 TRUE, /* pc_relative */ 782 0, /* bitpos */ 783 complain_overflow_signed, /* complain_on_overflow */ 784 bfd_elf_generic_reloc, /* special_function */ 785 "R_M32R_26_PCREL_RELA",/* name */ 786 FALSE, /* partial_inplace */ 787 0xffffff, /* src_mask */ 788 0xffffff, /* dst_mask */ 789 TRUE), /* pcrel_offset */ 790 791 /* High 16 bits of address when lower 16 is or'd in. */ 792 HOWTO (R_M32R_HI16_ULO_RELA, /* type */ 793 16, /* rightshift */ 794 2, /* size (0 = byte, 1 = short, 2 = long) */ 795 16, /* bitsize */ 796 FALSE, /* pc_relative */ 797 0, /* bitpos */ 798 complain_overflow_dont, /* complain_on_overflow */ 799 bfd_elf_generic_reloc, /* special_function */ 800 "R_M32R_HI16_ULO_RELA",/* name */ 801 FALSE, /* partial_inplace */ 802 0x0000ffff, /* src_mask */ 803 0x0000ffff, /* dst_mask */ 804 FALSE), /* pcrel_offset */ 805 806 /* High 16 bits of address when lower 16 is added in. */ 807 HOWTO (R_M32R_HI16_SLO_RELA, /* type */ 808 16, /* rightshift */ 809 2, /* size (0 = byte, 1 = short, 2 = long) */ 810 16, /* bitsize */ 811 FALSE, /* pc_relative */ 812 0, /* bitpos */ 813 complain_overflow_dont, /* complain_on_overflow */ 814 bfd_elf_generic_reloc, /* special_function */ 815 "R_M32R_HI16_SLO_RELA",/* name */ 816 FALSE, /* partial_inplace */ 817 0x0000ffff, /* src_mask */ 818 0x0000ffff, /* dst_mask */ 819 FALSE), /* pcrel_offset */ 820 821 /* Lower 16 bits of address. */ 822 HOWTO (R_M32R_LO16_RELA, /* type */ 823 0, /* rightshift */ 824 2, /* size (0 = byte, 1 = short, 2 = long) */ 825 16, /* bitsize */ 826 FALSE, /* pc_relative */ 827 0, /* bitpos */ 828 complain_overflow_dont, /* complain_on_overflow */ 829 bfd_elf_generic_reloc, /* special_function */ 830 "R_M32R_LO16_RELA", /* name */ 831 FALSE, /* partial_inplace */ 832 0x0000ffff, /* src_mask */ 833 0x0000ffff, /* dst_mask */ 834 FALSE), /* pcrel_offset */ 835 836 /* Small data area 16 bits offset. */ 837 HOWTO (R_M32R_SDA16_RELA, /* type */ 838 0, /* rightshift */ 839 2, /* size (0 = byte, 1 = short, 2 = long) */ 840 16, /* bitsize */ 841 FALSE, /* pc_relative */ 842 0, /* bitpos */ 843 complain_overflow_signed, /* complain_on_overflow */ 844 bfd_elf_generic_reloc, /* special_function */ 845 "R_M32R_SDA16_RELA", /* name */ 846 TRUE, /* partial_inplace */ /* FIXME: correct? */ 847 0x0000ffff, /* src_mask */ 848 0x0000ffff, /* dst_mask */ 849 FALSE), /* pcrel_offset */ 850 851 /* GNU extension to record C++ vtable hierarchy. */ 852 HOWTO (R_M32R_RELA_GNU_VTINHERIT, /* type */ 853 0, /* rightshift */ 854 2, /* size (0 = byte, 1 = short, 2 = long) */ 855 0, /* bitsize */ 856 FALSE, /* pc_relative */ 857 0, /* bitpos */ 858 complain_overflow_dont, /* complain_on_overflow */ 859 NULL, /* special_function */ 860 "R_M32R_RELA_GNU_VTINHERIT", /* name */ 861 FALSE, /* partial_inplace */ 862 0, /* src_mask */ 863 0, /* dst_mask */ 864 FALSE), /* pcrel_offset */ 865 866 /* GNU extension to record C++ vtable member usage. */ 867 HOWTO (R_M32R_RELA_GNU_VTENTRY, /* type */ 868 0, /* rightshift */ 869 2, /* size (0 = byte, 1 = short, 2 = long) */ 870 0, /* bitsize */ 871 FALSE, /* pc_relative */ 872 0, /* bitpos */ 873 complain_overflow_dont, /* complain_on_overflow */ 874 _bfd_elf_rel_vtable_reloc_fn, /* special_function */ 875 "R_M32R_RELA_GNU_VTENTRY", /* name */ 876 FALSE, /* partial_inplace */ 877 0, /* src_mask */ 878 0, /* dst_mask */ 879 FALSE), /* pcrel_offset */ 880 881 /* A 32 bit PC relative relocation. */ 882 HOWTO (R_M32R_REL32, /* type */ 883 0, /* rightshift */ 884 2, /* size (0 = byte, 1 = short, 2 = long) */ 885 32, /* bitsize */ 886 TRUE, /* pc_relative */ 887 0, /* bitpos */ 888 complain_overflow_bitfield, /* complain_on_overflow */ 889 bfd_elf_generic_reloc,/* special_function */ 890 "R_M32R_REL32", /* name */ 891 FALSE, /* partial_inplace */ 892 0xffffffff, /* src_mask */ 893 0xffffffff, /* dst_mask */ 894 TRUE), /* pcrel_offset */ 895 896 EMPTY_HOWTO (46), 897 EMPTY_HOWTO (47), 898 899 /* Like R_M32R_24, but referring to the GOT table entry for 900 the symbol. */ 901 HOWTO (R_M32R_GOT24, /* type */ 902 0, /* rightshift */ 903 2, /* size (0 = byte, 1 = short, 2 = long) */ 904 24, /* bitsize */ 905 FALSE, /* pc_relative */ 906 0, /* bitpos */ 907 complain_overflow_unsigned, /* complain_on_overflow */ 908 bfd_elf_generic_reloc, /* special_function */ 909 "R_M32R_GOT24", /* name */ 910 FALSE, /* partial_inplace */ 911 0xffffff, /* src_mask */ 912 0xffffff, /* dst_mask */ 913 FALSE), /* pcrel_offset */ 914 915 /* Like R_M32R_PCREL, but referring to the procedure linkage table 916 entry for the symbol. */ 917 HOWTO (R_M32R_26_PLTREL, /* type */ 918 2, /* rightshift */ 919 2, /* size (0 = byte, 1 = short, 2 = long) */ 920 24, /* bitsize */ 921 TRUE, /* pc_relative */ 922 0, /* bitpos */ 923 complain_overflow_signed, /* complain_on_overflow */ 924 bfd_elf_generic_reloc, /* special_function */ 925 "R_M32R_26_PLTREL", /* name */ 926 FALSE, /* partial_inplace */ 927 0xffffff, /* src_mask */ 928 0xffffff, /* dst_mask */ 929 TRUE), /* pcrel_offset */ 930 931 /* This is used only by the dynamic linker. The symbol should exist 932 both in the object being run and in some shared library. The 933 dynamic linker copies the data addressed by the symbol from the 934 shared library into the object, because the object being 935 run has to have the data at some particular address. */ 936 HOWTO (R_M32R_COPY, /* type */ 937 0, /* rightshift */ 938 2, /* size (0 = byte, 1 = short, 2 = long) */ 939 32, /* bitsize */ 940 FALSE, /* pc_relative */ 941 0, /* bitpos */ 942 complain_overflow_bitfield, /* complain_on_overflow */ 943 bfd_elf_generic_reloc, /* special_function */ 944 "R_M32R_COPY", /* name */ 945 FALSE, /* partial_inplace */ 946 0xffffffff, /* src_mask */ 947 0xffffffff, /* dst_mask */ 948 FALSE), /* pcrel_offset */ 949 950 /* Like R_M32R_24, but used when setting global offset table 951 entries. */ 952 HOWTO (R_M32R_GLOB_DAT, /* type */ 953 0, /* rightshift */ 954 2, /* size (0 = byte, 1 = short, 2 = long) */ 955 32, /* bitsize */ 956 FALSE, /* pc_relative */ 957 0, /* bitpos */ 958 complain_overflow_bitfield, /* complain_on_overflow */ 959 bfd_elf_generic_reloc, /* special_function */ 960 "R_M32R_GLOB_DAT", /* name */ 961 FALSE, /* partial_inplace */ 962 0xffffffff, /* src_mask */ 963 0xffffffff, /* dst_mask */ 964 FALSE), /* pcrel_offset */ 965 966 /* Marks a procedure linkage table entry for a symbol. */ 967 HOWTO (R_M32R_JMP_SLOT, /* type */ 968 0, /* rightshift */ 969 2, /* size (0 = byte, 1 = short, 2 = long) */ 970 32, /* bitsize */ 971 FALSE, /* pc_relative */ 972 0, /* bitpos */ 973 complain_overflow_bitfield, /* complain_on_overflow */ 974 bfd_elf_generic_reloc, /* special_function */ 975 "R_M32R_JMP_SLOT", /* name */ 976 FALSE, /* partial_inplace */ 977 0xffffffff, /* src_mask */ 978 0xffffffff, /* dst_mask */ 979 FALSE), /* pcrel_offset */ 980 981 /* Used only by the dynamic linker. When the object is run, this 982 longword is set to the load address of the object, plus the 983 addend. */ 984 HOWTO (R_M32R_RELATIVE, /* type */ 985 0, /* rightshift */ 986 2, /* size (0 = byte, 1 = short, 2 = long) */ 987 32, /* bitsize */ 988 FALSE, /* pc_relative */ 989 0, /* bitpos */ 990 complain_overflow_bitfield, /* complain_on_overflow */ 991 bfd_elf_generic_reloc, /* special_function */ 992 "R_M32R_RELATIVE", /* name */ 993 FALSE, /* partial_inplace */ 994 0xffffffff, /* src_mask */ 995 0xffffffff, /* dst_mask */ 996 FALSE), /* pcrel_offset */ 997 998 HOWTO (R_M32R_GOTOFF, /* type */ 999 0, /* rightshift */ 1000 2, /* size (0 = byte, 1 = short, 2 = long) */ 1001 24, /* bitsize */ 1002 FALSE, /* pc_relative */ 1003 0, /* bitpos */ 1004 complain_overflow_bitfield, /* complain_on_overflow */ 1005 bfd_elf_generic_reloc, /* special_function */ 1006 "R_M32R_GOTOFF", /* name */ 1007 FALSE, /* partial_inplace */ 1008 0xffffff, /* src_mask */ 1009 0xffffff, /* dst_mask */ 1010 FALSE), /* pcrel_offset */ 1011 1012 /* An PC Relative 24-bit relocation used when setting PIC offset 1013 table register. */ 1014 HOWTO (R_M32R_GOTPC24, /* type */ 1015 0, /* rightshift */ 1016 2, /* size (0 = byte, 1 = short, 2 = long) */ 1017 24, /* bitsize */ 1018 TRUE, /* pc_relative */ 1019 0, /* bitpos */ 1020 complain_overflow_unsigned, /* complain_on_overflow */ 1021 bfd_elf_generic_reloc, /* special_function */ 1022 "R_M32R_GOTPC24", /* name */ 1023 FALSE, /* partial_inplace */ 1024 0xffffff, /* src_mask */ 1025 0xffffff, /* dst_mask */ 1026 TRUE), /* pcrel_offset */ 1027 1028 /* Like R_M32R_HI16_ULO, but referring to the GOT table entry for 1029 the symbol. */ 1030 HOWTO (R_M32R_GOT16_HI_ULO, /* type */ 1031 16, /* rightshift */ 1032 2, /* size (0 = byte, 1 = short, 2 = long) */ 1033 16, /* bitsize */ 1034 FALSE, /* pc_relative */ 1035 0, /* bitpos */ 1036 complain_overflow_dont, /* complain_on_overflow */ 1037 bfd_elf_generic_reloc, /* special_function */ 1038 "R_M32R_GOT16_HI_ULO", /* name */ 1039 FALSE, /* partial_inplace */ 1040 0x0000ffff, /* src_mask */ 1041 0x0000ffff, /* dst_mask */ 1042 FALSE), /* pcrel_offset */ 1043 1044 /* Like R_M32R_HI16_SLO, but referring to the GOT table entry for 1045 the symbol. */ 1046 HOWTO (R_M32R_GOT16_HI_SLO, /* type */ 1047 16, /* rightshift */ 1048 2, /* size (0 = byte, 1 = short, 2 = long) */ 1049 16, /* bitsize */ 1050 FALSE, /* pc_relative */ 1051 0, /* bitpos */ 1052 complain_overflow_dont, /* complain_on_overflow */ 1053 bfd_elf_generic_reloc, /* special_function */ 1054 "R_M32R_GOT16_HI_SLO", /* name */ 1055 FALSE, /* partial_inplace */ 1056 0x0000ffff, /* src_mask */ 1057 0x0000ffff, /* dst_mask */ 1058 FALSE), /* pcrel_offset */ 1059 1060 /* Like R_M32R_LO16, but referring to the GOT table entry for 1061 the symbol. */ 1062 HOWTO (R_M32R_GOT16_LO, /* type */ 1063 0, /* rightshift */ 1064 2, /* size (0 = byte, 1 = short, 2 = long) */ 1065 16, /* bitsize */ 1066 FALSE, /* pc_relative */ 1067 0, /* bitpos */ 1068 complain_overflow_dont, /* complain_on_overflow */ 1069 bfd_elf_generic_reloc, /* special_function */ 1070 "R_M32R_GOT16_LO", /* name */ 1071 FALSE, /* partial_inplace */ 1072 0x0000ffff, /* src_mask */ 1073 0x0000ffff, /* dst_mask */ 1074 FALSE), /* pcrel_offset */ 1075 1076 /* An PC Relative relocation used when setting PIC offset table register. 1077 Like R_M32R_HI16_ULO, but referring to the GOT table entry for 1078 the symbol. */ 1079 HOWTO (R_M32R_GOTPC_HI_ULO, /* type */ 1080 16, /* rightshift */ 1081 2, /* size (0 = byte, 1 = short, 2 = long) */ 1082 16, /* bitsize */ 1083 FALSE, /* pc_relative */ 1084 0, /* bitpos */ 1085 complain_overflow_dont, /* complain_on_overflow */ 1086 bfd_elf_generic_reloc, /* special_function */ 1087 "R_M32R_GOTPC_HI_ULO", /* name */ 1088 FALSE, /* partial_inplace */ 1089 0x0000ffff, /* src_mask */ 1090 0x0000ffff, /* dst_mask */ 1091 TRUE), /* pcrel_offset */ 1092 1093 /* An PC Relative relocation used when setting PIC offset table register. 1094 Like R_M32R_HI16_SLO, but referring to the GOT table entry for 1095 the symbol. */ 1096 HOWTO (R_M32R_GOTPC_HI_SLO, /* type */ 1097 16, /* rightshift */ 1098 2, /* size (0 = byte, 1 = short, 2 = long) */ 1099 16, /* bitsize */ 1100 FALSE, /* pc_relative */ 1101 0, /* bitpos */ 1102 complain_overflow_dont, /* complain_on_overflow */ 1103 bfd_elf_generic_reloc, /* special_function */ 1104 "R_M32R_GOTPC_HI_SLO", /* name */ 1105 FALSE, /* partial_inplace */ 1106 0x0000ffff, /* src_mask */ 1107 0x0000ffff, /* dst_mask */ 1108 TRUE), /* pcrel_offset */ 1109 1110 /* An PC Relative relocation used when setting PIC offset table register. 1111 Like R_M32R_LO16, but referring to the GOT table entry for 1112 the symbol. */ 1113 HOWTO (R_M32R_GOTPC_LO, /* type */ 1114 0, /* rightshift */ 1115 2, /* size (0 = byte, 1 = short, 2 = long) */ 1116 16, /* bitsize */ 1117 FALSE, /* pc_relative */ 1118 0, /* bitpos */ 1119 complain_overflow_dont, /* complain_on_overflow */ 1120 bfd_elf_generic_reloc, /* special_function */ 1121 "R_M32R_GOTPC_LO", /* name */ 1122 FALSE, /* partial_inplace */ 1123 0x0000ffff, /* src_mask */ 1124 0x0000ffff, /* dst_mask */ 1125 TRUE), /* pcrel_offset */ 1126 1127 HOWTO (R_M32R_GOTOFF_HI_ULO, /* type */ 1128 16, /* rightshift */ 1129 2, /* size (0 = byte, 1 = short, 2 = long) */ 1130 16, /* bitsize */ 1131 FALSE, /* pc_relative */ 1132 0, /* bitpos */ 1133 complain_overflow_dont, /* complain_on_overflow */ 1134 bfd_elf_generic_reloc, /* special_function */ 1135 "R_M32R_GOTOFF_HI_ULO",/* name */ 1136 FALSE, /* partial_inplace */ 1137 0x0000ffff, /* src_mask */ 1138 0x0000ffff, /* dst_mask */ 1139 FALSE), /* pcrel_offset */ 1140 1141 HOWTO (R_M32R_GOTOFF_HI_SLO, /* type */ 1142 16, /* rightshift */ 1143 2, /* size (0 = byte, 1 = short, 2 = long) */ 1144 16, /* bitsize */ 1145 FALSE, /* pc_relative */ 1146 0, /* bitpos */ 1147 complain_overflow_dont, /* complain_on_overflow */ 1148 bfd_elf_generic_reloc, /* special_function */ 1149 "R_M32R_GOTOFF_HI_SLO",/* name */ 1150 FALSE, /* partial_inplace */ 1151 0x0000ffff, /* src_mask */ 1152 0x0000ffff, /* dst_mask */ 1153 FALSE), /* pcrel_offset */ 1154 1155 HOWTO (R_M32R_GOTOFF_LO, /* type */ 1156 0, /* rightshift */ 1157 2, /* size (0 = byte, 1 = short, 2 = long) */ 1158 16, /* bitsize */ 1159 FALSE, /* pc_relative */ 1160 0, /* bitpos */ 1161 complain_overflow_dont, /* complain_on_overflow */ 1162 bfd_elf_generic_reloc, /* special_function */ 1163 "R_M32R_GOTOFF_LO", /* name */ 1164 FALSE, /* partial_inplace */ 1165 0x0000ffff, /* src_mask */ 1166 0x0000ffff, /* dst_mask */ 1167 FALSE), /* pcrel_offset */ 1168 }; 1169 1170 /* Map BFD reloc types to M32R ELF reloc types. */ 1171 1172 struct m32r_reloc_map 1173 { 1174 bfd_reloc_code_real_type bfd_reloc_val; 1175 unsigned char elf_reloc_val; 1176 }; 1177 1178 #ifdef USE_M32R_OLD_RELOC 1179 static const struct m32r_reloc_map m32r_reloc_map_old[] = 1180 { 1181 { BFD_RELOC_NONE, R_M32R_NONE }, 1182 { BFD_RELOC_16, R_M32R_16 }, 1183 { BFD_RELOC_32, R_M32R_32 }, 1184 { BFD_RELOC_M32R_24, R_M32R_24 }, 1185 { BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL }, 1186 { BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL }, 1187 { BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL }, 1188 { BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO }, 1189 { BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO }, 1190 { BFD_RELOC_M32R_LO16, R_M32R_LO16 }, 1191 { BFD_RELOC_M32R_SDA16, R_M32R_SDA16 }, 1192 { BFD_RELOC_VTABLE_INHERIT, R_M32R_GNU_VTINHERIT }, 1193 { BFD_RELOC_VTABLE_ENTRY, R_M32R_GNU_VTENTRY }, 1194 }; 1195 #else 1196 static const struct m32r_reloc_map m32r_reloc_map[] = 1197 { 1198 { BFD_RELOC_NONE, R_M32R_NONE }, 1199 { BFD_RELOC_16, R_M32R_16_RELA }, 1200 { BFD_RELOC_32, R_M32R_32_RELA }, 1201 { BFD_RELOC_M32R_24, R_M32R_24_RELA }, 1202 { BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL_RELA }, 1203 { BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL_RELA }, 1204 { BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL_RELA }, 1205 { BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO_RELA }, 1206 { BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO_RELA }, 1207 { BFD_RELOC_M32R_LO16, R_M32R_LO16_RELA }, 1208 { BFD_RELOC_M32R_SDA16, R_M32R_SDA16_RELA }, 1209 { BFD_RELOC_VTABLE_INHERIT, R_M32R_RELA_GNU_VTINHERIT }, 1210 { BFD_RELOC_VTABLE_ENTRY, R_M32R_RELA_GNU_VTENTRY }, 1211 { BFD_RELOC_32_PCREL, R_M32R_REL32 }, 1212 1213 { BFD_RELOC_M32R_GOT24, R_M32R_GOT24 }, 1214 { BFD_RELOC_M32R_26_PLTREL, R_M32R_26_PLTREL }, 1215 { BFD_RELOC_M32R_COPY, R_M32R_COPY }, 1216 { BFD_RELOC_M32R_GLOB_DAT, R_M32R_GLOB_DAT }, 1217 { BFD_RELOC_M32R_JMP_SLOT, R_M32R_JMP_SLOT }, 1218 { BFD_RELOC_M32R_RELATIVE, R_M32R_RELATIVE }, 1219 { BFD_RELOC_M32R_GOTOFF, R_M32R_GOTOFF }, 1220 { BFD_RELOC_M32R_GOTPC24, R_M32R_GOTPC24 }, 1221 { BFD_RELOC_M32R_GOT16_HI_ULO, R_M32R_GOT16_HI_ULO }, 1222 { BFD_RELOC_M32R_GOT16_HI_SLO, R_M32R_GOT16_HI_SLO }, 1223 { BFD_RELOC_M32R_GOT16_LO, R_M32R_GOT16_LO }, 1224 { BFD_RELOC_M32R_GOTPC_HI_ULO, R_M32R_GOTPC_HI_ULO }, 1225 { BFD_RELOC_M32R_GOTPC_HI_SLO, R_M32R_GOTPC_HI_SLO }, 1226 { BFD_RELOC_M32R_GOTPC_LO, R_M32R_GOTPC_LO }, 1227 { BFD_RELOC_M32R_GOTOFF_HI_ULO, R_M32R_GOTOFF_HI_ULO }, 1228 { BFD_RELOC_M32R_GOTOFF_HI_SLO, R_M32R_GOTOFF_HI_SLO }, 1229 { BFD_RELOC_M32R_GOTOFF_LO, R_M32R_GOTOFF_LO }, 1230 }; 1231 #endif 1232 1233 static reloc_howto_type * 1234 bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1235 bfd_reloc_code_real_type code) 1236 { 1237 unsigned int i; 1238 1239 #ifdef USE_M32R_OLD_RELOC 1240 for (i = 0; 1241 i < sizeof (m32r_reloc_map_old) / sizeof (struct m32r_reloc_map); 1242 i++) 1243 if (m32r_reloc_map_old[i].bfd_reloc_val == code) 1244 return &m32r_elf_howto_table[m32r_reloc_map_old[i].elf_reloc_val]; 1245 1246 #else /* ! USE_M32R_OLD_RELOC */ 1247 1248 for (i = 0; 1249 i < sizeof (m32r_reloc_map) / sizeof (struct m32r_reloc_map); 1250 i++) 1251 if (m32r_reloc_map[i].bfd_reloc_val == code) 1252 return &m32r_elf_howto_table[m32r_reloc_map[i].elf_reloc_val]; 1253 #endif 1254 1255 return NULL; 1256 } 1257 1258 static reloc_howto_type * 1259 bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1260 const char *r_name) 1261 { 1262 unsigned int i; 1263 1264 for (i = 0; 1265 i < sizeof (m32r_elf_howto_table) / sizeof (m32r_elf_howto_table[0]); 1266 i++) 1267 if (m32r_elf_howto_table[i].name != NULL 1268 && strcasecmp (m32r_elf_howto_table[i].name, r_name) == 0) 1269 return &m32r_elf_howto_table[i]; 1270 1271 return NULL; 1272 } 1273 1274 /* Set the howto pointer for an M32R ELF reloc. */ 1275 1276 static void 1277 m32r_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, 1278 arelent *cache_ptr, 1279 Elf_Internal_Rela *dst) 1280 { 1281 unsigned int r_type; 1282 1283 r_type = ELF32_R_TYPE (dst->r_info); 1284 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) <= (unsigned int) R_M32R_GNU_VTENTRY); 1285 cache_ptr->howto = &m32r_elf_howto_table[r_type]; 1286 } 1287 1288 static void 1289 m32r_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 1290 arelent *cache_ptr, 1291 Elf_Internal_Rela *dst) 1292 { 1293 BFD_ASSERT ((ELF32_R_TYPE(dst->r_info) == (unsigned int) R_M32R_NONE) 1294 || ((ELF32_R_TYPE(dst->r_info) > (unsigned int) R_M32R_GNU_VTENTRY) 1295 && (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_M32R_max))); 1296 cache_ptr->howto = &m32r_elf_howto_table[ELF32_R_TYPE(dst->r_info)]; 1297 } 1298 1299 1300 /* Given a BFD section, try to locate the corresponding ELF section 1301 index. */ 1302 1303 static bfd_boolean 1304 _bfd_m32r_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, 1305 asection *sec, 1306 int *retval) 1307 { 1308 if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0) 1309 { 1310 *retval = SHN_M32R_SCOMMON; 1311 return TRUE; 1312 } 1313 return FALSE; 1314 } 1315 1316 /* M32R ELF uses two common sections. One is the usual one, and the other 1317 is for small objects. All the small objects are kept together, and then 1318 referenced via one register, which yields faster assembler code. It is 1319 up to the compiler to emit an instruction to load the register with 1320 _SDA_BASE. This is what we use for the small common section. This 1321 approach is copied from elf32-mips.c. */ 1322 static asection m32r_elf_scom_section; 1323 static asymbol m32r_elf_scom_symbol; 1324 static asymbol *m32r_elf_scom_symbol_ptr; 1325 1326 /* Handle the special M32R section numbers that a symbol may use. */ 1327 1328 static void 1329 _bfd_m32r_elf_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *asym) 1330 { 1331 elf_symbol_type *elfsym = (elf_symbol_type *) asym; 1332 1333 switch (elfsym->internal_elf_sym.st_shndx) 1334 { 1335 case SHN_M32R_SCOMMON: 1336 if (m32r_elf_scom_section.name == NULL) 1337 { 1338 /* Initialize the small common section. */ 1339 m32r_elf_scom_section.name = ".scommon"; 1340 m32r_elf_scom_section.flags = SEC_IS_COMMON; 1341 m32r_elf_scom_section.output_section = &m32r_elf_scom_section; 1342 m32r_elf_scom_section.symbol = &m32r_elf_scom_symbol; 1343 m32r_elf_scom_section.symbol_ptr_ptr = &m32r_elf_scom_symbol_ptr; 1344 m32r_elf_scom_symbol.name = ".scommon"; 1345 m32r_elf_scom_symbol.flags = BSF_SECTION_SYM; 1346 m32r_elf_scom_symbol.section = &m32r_elf_scom_section; 1347 m32r_elf_scom_symbol_ptr = &m32r_elf_scom_symbol; 1348 } 1349 asym->section = &m32r_elf_scom_section; 1350 asym->value = elfsym->internal_elf_sym.st_size; 1351 break; 1352 } 1353 } 1354 1355 /* Hook called by the linker routine which adds symbols from an object 1356 file. We must handle the special M32R section numbers here. 1357 We also keep watching for whether we need to create the sdata special 1358 linker sections. */ 1359 1360 static bfd_boolean 1361 m32r_elf_add_symbol_hook (bfd *abfd, 1362 struct bfd_link_info *info, 1363 Elf_Internal_Sym *sym, 1364 const char **namep, 1365 flagword *flagsp ATTRIBUTE_UNUSED, 1366 asection **secp, 1367 bfd_vma *valp) 1368 { 1369 if (! info->relocatable 1370 && (*namep)[0] == '_' && (*namep)[1] == 'S' 1371 && strcmp (*namep, "_SDA_BASE_") == 0 1372 && is_elf_hash_table (info->hash)) 1373 { 1374 /* This is simpler than using _bfd_elf_create_linker_section 1375 (our needs are simpler than ppc's needs). Also 1376 _bfd_elf_create_linker_section currently has a bug where if a .sdata 1377 section already exists a new one is created that follows it which 1378 screws of _SDA_BASE_ address calcs because output_offset != 0. */ 1379 struct elf_link_hash_entry *h; 1380 struct bfd_link_hash_entry *bh; 1381 asection *s = bfd_get_section_by_name (abfd, ".sdata"); 1382 1383 /* The following code was cobbled from elf32-ppc.c and elflink.c. */ 1384 if (s == NULL) 1385 { 1386 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 1387 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 1388 1389 s = bfd_make_section_anyway_with_flags (abfd, ".sdata", 1390 flags); 1391 if (s == NULL) 1392 return FALSE; 1393 bfd_set_section_alignment (abfd, s, 2); 1394 } 1395 1396 bh = bfd_link_hash_lookup (info->hash, "_SDA_BASE_", 1397 FALSE, FALSE, FALSE); 1398 1399 if ((bh == NULL || bh->type == bfd_link_hash_undefined) 1400 && !(_bfd_generic_link_add_one_symbol (info, 1401 abfd, 1402 "_SDA_BASE_", 1403 BSF_GLOBAL, 1404 s, 1405 (bfd_vma) 32768, 1406 NULL, 1407 FALSE, 1408 get_elf_backend_data (abfd)->collect, 1409 &bh))) 1410 return FALSE; 1411 h = (struct elf_link_hash_entry *) bh; 1412 h->type = STT_OBJECT; 1413 } 1414 1415 switch (sym->st_shndx) 1416 { 1417 case SHN_M32R_SCOMMON: 1418 *secp = bfd_make_section_old_way (abfd, ".scommon"); 1419 (*secp)->flags |= SEC_IS_COMMON; 1420 *valp = sym->st_size; 1421 break; 1422 } 1423 1424 return TRUE; 1425 } 1426 1427 /* We have to figure out the SDA_BASE value, so that we can adjust the 1428 symbol value correctly. We look up the symbol _SDA_BASE_ in the output 1429 BFD. If we can't find it, we're stuck. We cache it in the ELF 1430 target data. We don't need to adjust the symbol value for an 1431 external symbol if we are producing relocatable output. */ 1432 1433 static bfd_reloc_status_type 1434 m32r_elf_final_sda_base (bfd *output_bfd, 1435 struct bfd_link_info *info, 1436 const char **error_message, 1437 bfd_vma *psb) 1438 { 1439 if (elf_gp (output_bfd) == 0) 1440 { 1441 struct bfd_link_hash_entry *h; 1442 1443 h = bfd_link_hash_lookup (info->hash, "_SDA_BASE_", FALSE, FALSE, TRUE); 1444 if (h != NULL && h->type == bfd_link_hash_defined) 1445 elf_gp (output_bfd) = (h->u.def.value 1446 + h->u.def.section->output_section->vma 1447 + h->u.def.section->output_offset); 1448 else 1449 { 1450 /* Only get the error once. */ 1451 *psb = elf_gp (output_bfd) = 4; 1452 *error_message = 1453 (const char *) _("SDA relocation when _SDA_BASE_ not defined"); 1454 return bfd_reloc_dangerous; 1455 } 1456 } 1457 *psb = elf_gp (output_bfd); 1458 return bfd_reloc_ok; 1459 } 1460 1461 /* Return size of a PLT entry. */ 1462 #define elf_m32r_sizeof_plt(info) PLT_ENTRY_SIZE 1463 1464 /* The m32r linker needs to keep track of the number of relocs that it 1465 decides to copy in check_relocs for each symbol. This is so that 1466 it can discard PC relative relocs if it doesn't need them when 1467 linking with -Bsymbolic. We store the information in a field 1468 extending the regular ELF linker hash table. */ 1469 1470 /* This structure keeps track of the number of PC relative relocs we 1471 have copied for a given symbol. */ 1472 1473 struct elf_m32r_pcrel_relocs_copied 1474 { 1475 /* Next section. */ 1476 struct elf_m32r_pcrel_relocs_copied *next; 1477 /* A section in dynobj. */ 1478 asection *section; 1479 /* Number of relocs copied in this section. */ 1480 bfd_size_type count; 1481 }; 1482 1483 /* The sh linker needs to keep track of the number of relocs that it 1484 decides to copy as dynamic relocs in check_relocs for each symbol. 1485 This is so that it can later discard them if they are found to be 1486 unnecessary. We store the information in a field extending the 1487 regular ELF linker hash table. */ 1488 1489 struct elf_m32r_dyn_relocs 1490 { 1491 struct elf_m32r_dyn_relocs *next; 1492 1493 /* The input section of the reloc. */ 1494 asection *sec; 1495 1496 /* Total number of relocs copied for the input section. */ 1497 bfd_size_type count; 1498 1499 /* Number of pc-relative relocs copied for the input section. */ 1500 bfd_size_type pc_count; 1501 }; 1502 1503 1504 /* m32r ELF linker hash entry. */ 1505 1506 struct elf_m32r_link_hash_entry 1507 { 1508 struct elf_link_hash_entry root; 1509 1510 /* Track dynamic relocs copied for this symbol. */ 1511 struct elf_m32r_dyn_relocs *dyn_relocs; 1512 }; 1513 1514 /* m32r ELF linker hash table. */ 1515 1516 struct elf_m32r_link_hash_table 1517 { 1518 struct elf_link_hash_table root; 1519 1520 /* Short-cuts to get to dynamic linker sections. */ 1521 asection *sgot; 1522 asection *sgotplt; 1523 asection *srelgot; 1524 asection *splt; 1525 asection *srelplt; 1526 asection *sdynbss; 1527 asection *srelbss; 1528 1529 /* Small local sym cache. */ 1530 struct sym_cache sym_cache; 1531 }; 1532 1533 /* Traverse an m32r ELF linker hash table. */ 1534 1535 #define m32r_elf_link_hash_traverse(table, func, info) \ 1536 (elf_link_hash_traverse \ 1537 (&(table)->root, \ 1538 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ 1539 (info))) 1540 1541 /* Get the m32r ELF linker hash table from a link_info structure. */ 1542 1543 #define m32r_elf_hash_table(p) \ 1544 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 1545 == M32R_ELF_DATA ? ((struct elf_m32r_link_hash_table *) ((p)->hash)) : NULL) 1546 1547 /* Create an entry in an m32r ELF linker hash table. */ 1548 1549 static struct bfd_hash_entry * 1550 m32r_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 1551 struct bfd_hash_table *table, 1552 const char *string) 1553 { 1554 struct elf_m32r_link_hash_entry *ret = 1555 (struct elf_m32r_link_hash_entry *) entry; 1556 1557 /* Allocate the structure if it has not already been allocated by a 1558 subclass. */ 1559 if (ret == NULL) 1560 ret = bfd_hash_allocate (table, 1561 sizeof (struct elf_m32r_link_hash_entry)); 1562 if (ret == NULL) 1563 return NULL; 1564 1565 /* Call the allocation method of the superclass. */ 1566 ret = ((struct elf_m32r_link_hash_entry *) 1567 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 1568 table, string)); 1569 if (ret != NULL) 1570 { 1571 struct elf_m32r_link_hash_entry *eh; 1572 1573 eh = (struct elf_m32r_link_hash_entry *) ret; 1574 eh->dyn_relocs = NULL; 1575 } 1576 1577 return (struct bfd_hash_entry *) ret; 1578 } 1579 1580 /* Create an m32r ELF linker hash table. */ 1581 1582 static struct bfd_link_hash_table * 1583 m32r_elf_link_hash_table_create (bfd *abfd) 1584 { 1585 struct elf_m32r_link_hash_table *ret; 1586 bfd_size_type amt = sizeof (struct elf_m32r_link_hash_table); 1587 1588 ret = bfd_malloc (amt); 1589 if (ret == NULL) 1590 return NULL; 1591 1592 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, 1593 m32r_elf_link_hash_newfunc, 1594 sizeof (struct elf_m32r_link_hash_entry), 1595 M32R_ELF_DATA)) 1596 { 1597 free (ret); 1598 return NULL; 1599 } 1600 1601 ret->sgot = NULL; 1602 ret->sgotplt = NULL; 1603 ret->srelgot = NULL; 1604 ret->splt = NULL; 1605 ret->srelplt = NULL; 1606 ret->sdynbss = NULL; 1607 ret->srelbss = NULL; 1608 ret->sym_cache.abfd = NULL; 1609 1610 return &ret->root.root; 1611 } 1612 1613 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up 1614 shortcuts to them in our hash table. */ 1615 1616 static bfd_boolean 1617 create_got_section (bfd *dynobj, struct bfd_link_info *info) 1618 { 1619 struct elf_m32r_link_hash_table *htab; 1620 1621 if (! _bfd_elf_create_got_section (dynobj, info)) 1622 return FALSE; 1623 1624 htab = m32r_elf_hash_table (info); 1625 if (htab == NULL) 1626 return FALSE; 1627 1628 htab->sgot = bfd_get_linker_section (dynobj, ".got"); 1629 htab->sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); 1630 htab->srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 1631 if (! htab->sgot || ! htab->sgotplt || ! htab->srelgot) 1632 abort (); 1633 1634 return TRUE; 1635 } 1636 1637 /* Create dynamic sections when linking against a dynamic object. */ 1638 1639 static bfd_boolean 1640 m32r_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 1641 { 1642 struct elf_m32r_link_hash_table *htab; 1643 flagword flags, pltflags; 1644 asection *s; 1645 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 1646 int ptralign = 2; /* 32bit */ 1647 1648 htab = m32r_elf_hash_table (info); 1649 if (htab == NULL) 1650 return FALSE; 1651 1652 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and 1653 .rel[a].bss sections. */ 1654 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 1655 | SEC_LINKER_CREATED); 1656 1657 pltflags = flags; 1658 pltflags |= SEC_CODE; 1659 if (bed->plt_not_loaded) 1660 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); 1661 if (bed->plt_readonly) 1662 pltflags |= SEC_READONLY; 1663 1664 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); 1665 htab->splt = s; 1666 if (s == NULL 1667 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) 1668 return FALSE; 1669 1670 if (bed->want_plt_sym) 1671 { 1672 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the 1673 .plt section. */ 1674 struct bfd_link_hash_entry *bh = NULL; 1675 struct elf_link_hash_entry *h; 1676 1677 if (! (_bfd_generic_link_add_one_symbol 1678 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 1679 (bfd_vma) 0, NULL, FALSE, 1680 get_elf_backend_data (abfd)->collect, &bh))) 1681 return FALSE; 1682 h = (struct elf_link_hash_entry *) bh; 1683 h->def_regular = 1; 1684 h->type = STT_OBJECT; 1685 htab->root.hplt = h; 1686 1687 if (info->shared 1688 && ! bfd_elf_link_record_dynamic_symbol (info, h)) 1689 return FALSE; 1690 } 1691 1692 s = bfd_make_section_anyway_with_flags (abfd, 1693 bed->default_use_rela_p 1694 ? ".rela.plt" : ".rel.plt", 1695 flags | SEC_READONLY); 1696 htab->srelplt = s; 1697 if (s == NULL 1698 || ! bfd_set_section_alignment (abfd, s, ptralign)) 1699 return FALSE; 1700 1701 if (htab->sgot == NULL 1702 && ! create_got_section (abfd, info)) 1703 return FALSE; 1704 1705 if (bed->want_dynbss) 1706 { 1707 /* The .dynbss section is a place to put symbols which are defined 1708 by dynamic objects, are referenced by regular objects, and are 1709 not functions. We must allocate space for them in the process 1710 image and use a R_*_COPY reloc to tell the dynamic linker to 1711 initialize them at run time. The linker script puts the .dynbss 1712 section into the .bss section of the final image. */ 1713 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", 1714 SEC_ALLOC | SEC_LINKER_CREATED); 1715 htab->sdynbss = s; 1716 if (s == NULL) 1717 return FALSE; 1718 /* The .rel[a].bss section holds copy relocs. This section is not 1719 normally needed. We need to create it here, though, so that the 1720 linker will map it to an output section. We can't just create it 1721 only if we need it, because we will not know whether we need it 1722 until we have seen all the input files, and the first time the 1723 main linker code calls BFD after examining all the input files 1724 (size_dynamic_sections) the input sections have already been 1725 mapped to the output sections. If the section turns out not to 1726 be needed, we can discard it later. We will never need this 1727 section when generating a shared object, since they do not use 1728 copy relocs. */ 1729 if (! info->shared) 1730 { 1731 s = bfd_make_section_anyway_with_flags (abfd, 1732 (bed->default_use_rela_p 1733 ? ".rela.bss" : ".rel.bss"), 1734 flags | SEC_READONLY); 1735 htab->srelbss = s; 1736 if (s == NULL 1737 || ! bfd_set_section_alignment (abfd, s, ptralign)) 1738 return FALSE; 1739 } 1740 } 1741 1742 return TRUE; 1743 } 1744 1745 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 1746 1747 static void 1748 m32r_elf_copy_indirect_symbol (struct bfd_link_info *info, 1749 struct elf_link_hash_entry *dir, 1750 struct elf_link_hash_entry *ind) 1751 { 1752 struct elf_m32r_link_hash_entry * edir; 1753 struct elf_m32r_link_hash_entry * eind; 1754 1755 edir = (struct elf_m32r_link_hash_entry *) dir; 1756 eind = (struct elf_m32r_link_hash_entry *) ind; 1757 1758 if (eind->dyn_relocs != NULL) 1759 { 1760 if (edir->dyn_relocs != NULL) 1761 { 1762 struct elf_m32r_dyn_relocs **pp; 1763 struct elf_m32r_dyn_relocs *p; 1764 1765 /* Add reloc counts against the indirect sym to the direct sym 1766 list. Merge any entries against the same section. */ 1767 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) 1768 { 1769 struct elf_m32r_dyn_relocs *q; 1770 1771 for (q = edir->dyn_relocs; q != NULL; q = q->next) 1772 if (q->sec == p->sec) 1773 { 1774 q->pc_count += p->pc_count; 1775 q->count += p->count; 1776 *pp = p->next; 1777 break; 1778 } 1779 if (q == NULL) 1780 pp = &p->next; 1781 } 1782 *pp = edir->dyn_relocs; 1783 } 1784 1785 edir->dyn_relocs = eind->dyn_relocs; 1786 eind->dyn_relocs = NULL; 1787 } 1788 1789 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 1790 } 1791 1792 1793 /* 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 (! info->shared 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 (info->shared) 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 (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, info->shared, 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 (! info->shared 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, info->shared, 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 (info->shared) 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 (info->executable) 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 (info->shared) 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 (info->executable) 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 while (h->root.type == bfd_link_hash_indirect 2503 || h->root.type == bfd_link_hash_warning) 2504 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2505 sym_name = h->root.root.string; 2506 2507 if (h->root.type == bfd_link_hash_defined 2508 || h->root.type == bfd_link_hash_defweak) 2509 { 2510 bfd_boolean dyn; 2511 sec = h->root.u.def.section; 2512 2513 dyn = htab->root.dynamic_sections_created; 2514 sec = h->root.u.def.section; 2515 if (r_type == R_M32R_GOTPC24 2516 || (r_type == R_M32R_GOTPC_HI_ULO 2517 || r_type == R_M32R_GOTPC_HI_SLO 2518 || r_type == R_M32R_GOTPC_LO) 2519 || (r_type == R_M32R_26_PLTREL 2520 && h->plt.offset != (bfd_vma) -1) 2521 || ((r_type == R_M32R_GOT24 2522 || r_type == R_M32R_GOT16_HI_ULO 2523 || r_type == R_M32R_GOT16_HI_SLO 2524 || r_type == R_M32R_GOT16_LO) 2525 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 2526 info->shared, h) 2527 && (! info->shared 2528 || (! info->symbolic && h->dynindx != -1) 2529 || !h->def_regular)) 2530 || (info->shared 2531 && ((! info->symbolic && h->dynindx != -1) 2532 || !h->def_regular) 2533 && (((r_type == R_M32R_16_RELA 2534 || r_type == R_M32R_32_RELA 2535 || r_type == R_M32R_24_RELA 2536 || r_type == R_M32R_HI16_ULO_RELA 2537 || r_type == R_M32R_HI16_SLO_RELA 2538 || r_type == R_M32R_LO16_RELA) 2539 && !h->forced_local) 2540 || r_type == R_M32R_REL32 2541 || r_type == R_M32R_10_PCREL_RELA 2542 || r_type == R_M32R_18_PCREL_RELA 2543 || r_type == R_M32R_26_PCREL_RELA) 2544 && ((input_section->flags & SEC_ALLOC) != 0 2545 /* DWARF will emit R_M32R_16(24,32) relocations 2546 in its sections against symbols defined 2547 externally in shared libraries. We can't do 2548 anything with them here. */ 2549 || ((input_section->flags & SEC_DEBUGGING) != 0 2550 && h->def_dynamic)))) 2551 { 2552 /* In these cases, we don't need the relocation 2553 value. We check specially because in some 2554 obscure cases sec->output_section will be NULL. */ 2555 } 2556 else if (sec->output_section != NULL) 2557 relocation = (h->root.u.def.value 2558 + sec->output_section->vma 2559 + sec->output_offset); 2560 else if (!info->relocatable 2561 && (_bfd_elf_section_offset (output_bfd, info, 2562 input_section, 2563 rel->r_offset) 2564 != (bfd_vma) -1)) 2565 { 2566 (*_bfd_error_handler) 2567 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), 2568 input_bfd, 2569 input_section, 2570 (long) rel->r_offset, 2571 howto->name, 2572 h->root.root.string); 2573 } 2574 } 2575 else if (h->root.type == bfd_link_hash_undefweak) 2576 ; 2577 else if (info->unresolved_syms_in_objects == RM_IGNORE 2578 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) 2579 ; 2580 else if (!info->relocatable) 2581 { 2582 if (! ((*info->callbacks->undefined_symbol) 2583 (info, h->root.root.string, input_bfd, 2584 input_section, offset, 2585 (info->unresolved_syms_in_objects == RM_GENERATE_ERROR 2586 || ELF_ST_VISIBILITY (h->other))))) 2587 return FALSE; 2588 } 2589 } 2590 2591 if (sec != NULL && discarded_section (sec)) 2592 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2593 rel, 1, relend, howto, 0, contents); 2594 2595 if (info->relocatable && !use_rel) 2596 { 2597 /* This is a relocatable link. We don't have to change 2598 anything, unless the reloc is against a section symbol, 2599 in which case we have to adjust according to where the 2600 section symbol winds up in the output section. */ 2601 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) 2602 rel->r_addend += sec->output_offset; 2603 continue; 2604 } 2605 2606 if (info->relocatable && use_rel) 2607 { 2608 /* This is a relocatable link. We don't have to change 2609 anything, unless the reloc is against a section symbol, 2610 in which case we have to adjust according to where the 2611 section symbol winds up in the output section. */ 2612 if (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION) 2613 continue; 2614 2615 addend += sec->output_offset; 2616 2617 /* If partial_inplace, we need to store any additional addend 2618 back in the section. */ 2619 if (! howto->partial_inplace) 2620 continue; 2621 /* ??? Here is a nice place to call a special_function 2622 like handler. */ 2623 if (r_type != R_M32R_HI16_SLO && r_type != R_M32R_HI16_ULO) 2624 r = _bfd_relocate_contents (howto, input_bfd, 2625 addend, contents + offset); 2626 else 2627 { 2628 Elf_Internal_Rela *lorel; 2629 2630 /* We allow an arbitrary number of HI16 relocs before the 2631 LO16 reloc. This permits gcc to emit the HI and LO relocs 2632 itself. */ 2633 for (lorel = rel + 1; 2634 (lorel < relend 2635 && (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO 2636 || ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO)); 2637 lorel++) 2638 continue; 2639 if (lorel < relend 2640 && ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16) 2641 { 2642 m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel, 2643 contents, addend); 2644 r = bfd_reloc_ok; 2645 } 2646 else 2647 r = _bfd_relocate_contents (howto, input_bfd, 2648 addend, contents + offset); 2649 } 2650 } 2651 else 2652 { 2653 /* Sanity check the address. */ 2654 if (offset > high_address) 2655 { 2656 r = bfd_reloc_outofrange; 2657 goto check_reloc; 2658 } 2659 2660 switch ((int) r_type) 2661 { 2662 case R_M32R_GOTOFF: 2663 /* Relocation is relative to the start of the global offset 2664 table (for ld24 rx, #uimm24). eg access at label+addend 2665 2666 ld24 rx. #label@GOTOFF + addend 2667 sub rx, r12. */ 2668 2669 BFD_ASSERT (sgot != NULL); 2670 2671 relocation = -(relocation - sgot->output_section->vma); 2672 rel->r_addend = -rel->r_addend; 2673 break; 2674 2675 case R_M32R_GOTOFF_HI_ULO: 2676 case R_M32R_GOTOFF_HI_SLO: 2677 case R_M32R_GOTOFF_LO: 2678 BFD_ASSERT (sgot != NULL); 2679 2680 relocation -= sgot->output_section->vma; 2681 2682 if ((r_type == R_M32R_GOTOFF_HI_SLO) 2683 && ((relocation + rel->r_addend) & 0x8000)) 2684 rel->r_addend += 0x10000; 2685 break; 2686 2687 case R_M32R_GOTPC24: 2688 /* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation 2689 ld24 rx,#_GLOBAL_OFFSET_TABLE_ 2690 */ 2691 relocation = sgot->output_section->vma; 2692 break; 2693 2694 case R_M32R_GOTPC_HI_ULO: 2695 case R_M32R_GOTPC_HI_SLO: 2696 case R_M32R_GOTPC_LO: 2697 { 2698 /* .got(_GLOBAL_OFFSET_TABLE_) - pc relocation 2699 bl .+4 2700 seth rx,#high(_GLOBAL_OFFSET_TABLE_) 2701 or3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4) 2702 or 2703 bl .+4 2704 seth rx,#shigh(_GLOBAL_OFFSET_TABLE_) 2705 add3 rx,rx,#low(_GLOBAL_OFFSET_TABLE_ +4) 2706 */ 2707 relocation = sgot->output_section->vma; 2708 relocation -= (input_section->output_section->vma 2709 + input_section->output_offset 2710 + rel->r_offset); 2711 if ((r_type == R_M32R_GOTPC_HI_SLO) 2712 && ((relocation + rel->r_addend) & 0x8000)) 2713 rel->r_addend += 0x10000; 2714 2715 break; 2716 } 2717 case R_M32R_GOT16_HI_ULO: 2718 case R_M32R_GOT16_HI_SLO: 2719 case R_M32R_GOT16_LO: 2720 /* Fall through. */ 2721 case R_M32R_GOT24: 2722 /* Relocation is to the entry for this symbol in the global 2723 offset table. */ 2724 BFD_ASSERT (sgot != NULL); 2725 2726 if (h != NULL) 2727 { 2728 bfd_boolean dyn; 2729 bfd_vma off; 2730 2731 off = h->got.offset; 2732 BFD_ASSERT (off != (bfd_vma) -1); 2733 2734 dyn = htab->root.dynamic_sections_created; 2735 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 2736 || (info->shared 2737 && (info->symbolic 2738 || h->dynindx == -1 2739 || h->forced_local) 2740 && h->def_regular)) 2741 { 2742 /* This is actually a static link, or it is a 2743 -Bsymbolic link and the symbol is defined 2744 locally, or the symbol was forced to be local 2745 because of a version file. We must initialize 2746 this entry in the global offset table. Since the 2747 offset must always be a multiple of 4, we use the 2748 least significant bit to record whether we have 2749 initialized it already. 2750 2751 When doing a dynamic link, we create a .rela.got 2752 relocation entry to initialize the value. This 2753 is done in the finish_dynamic_symbol routine. */ 2754 if ((off & 1) != 0) 2755 off &= ~1; 2756 else 2757 { 2758 bfd_put_32 (output_bfd, relocation, 2759 sgot->contents + off); 2760 h->got.offset |= 1; 2761 } 2762 } 2763 2764 relocation = sgot->output_offset + off; 2765 } 2766 else 2767 { 2768 bfd_vma off; 2769 bfd_byte *loc; 2770 2771 BFD_ASSERT (local_got_offsets != NULL 2772 && local_got_offsets[r_symndx] != (bfd_vma) -1); 2773 2774 off = local_got_offsets[r_symndx]; 2775 2776 /* The offset must always be a multiple of 4. We use 2777 the least significant bit to record whether we have 2778 already processed this entry. */ 2779 if ((off & 1) != 0) 2780 off &= ~1; 2781 else 2782 { 2783 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 2784 2785 if (info->shared) 2786 { 2787 asection *srelgot; 2788 Elf_Internal_Rela outrel; 2789 2790 /* We need to generate a R_M32R_RELATIVE reloc 2791 for the dynamic linker. */ 2792 srelgot = bfd_get_linker_section (dynobj, 2793 ".rela.got"); 2794 BFD_ASSERT (srelgot != NULL); 2795 2796 outrel.r_offset = (sgot->output_section->vma 2797 + sgot->output_offset 2798 + off); 2799 outrel.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); 2800 outrel.r_addend = relocation; 2801 loc = srelgot->contents; 2802 loc += srelgot->reloc_count * sizeof (Elf32_External_Rela); 2803 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); 2804 ++srelgot->reloc_count; 2805 } 2806 2807 local_got_offsets[r_symndx] |= 1; 2808 } 2809 2810 relocation = sgot->output_offset + off; 2811 } 2812 if ((r_type == R_M32R_GOT16_HI_SLO) 2813 && ((relocation + rel->r_addend) & 0x8000)) 2814 rel->r_addend += 0x10000; 2815 2816 break; 2817 2818 case R_M32R_26_PLTREL: 2819 /* Relocation is to the entry for this symbol in the 2820 procedure linkage table. */ 2821 2822 /* The native assembler will generate a 26_PLTREL reloc 2823 for a local symbol if you assemble a call from one 2824 section to another when using -K pic. */ 2825 if (h == NULL) 2826 break; 2827 2828 if (h->forced_local) 2829 break; 2830 2831 if (h->plt.offset == (bfd_vma) -1) 2832 /* We didn't make a PLT entry for this symbol. This 2833 happens when statically linking PIC code, or when 2834 using -Bsymbolic. */ 2835 break; 2836 2837 relocation = (splt->output_section->vma 2838 + splt->output_offset 2839 + h->plt.offset); 2840 break; 2841 2842 case R_M32R_HI16_SLO_RELA: 2843 if ((relocation + rel->r_addend) & 0x8000) 2844 rel->r_addend += 0x10000; 2845 /* Fall through. */ 2846 2847 case R_M32R_16_RELA: 2848 case R_M32R_24_RELA: 2849 case R_M32R_32_RELA: 2850 case R_M32R_REL32: 2851 case R_M32R_10_PCREL_RELA: 2852 case R_M32R_18_PCREL_RELA: 2853 case R_M32R_26_PCREL_RELA: 2854 case R_M32R_HI16_ULO_RELA: 2855 case R_M32R_LO16_RELA: 2856 if (info->shared 2857 && r_symndx != STN_UNDEF 2858 && (input_section->flags & SEC_ALLOC) != 0 2859 && (( r_type != R_M32R_10_PCREL_RELA 2860 && r_type != R_M32R_18_PCREL_RELA 2861 && r_type != R_M32R_26_PCREL_RELA 2862 && r_type != R_M32R_REL32) 2863 || (h != NULL 2864 && h->dynindx != -1 2865 && (! info->symbolic 2866 || !h->def_regular)))) 2867 { 2868 Elf_Internal_Rela outrel; 2869 bfd_boolean skip, relocate; 2870 bfd_byte *loc; 2871 2872 /* When generating a shared object, these relocations 2873 are copied into the output file to be resolved at run 2874 time. */ 2875 if (sreloc == NULL) 2876 { 2877 sreloc = _bfd_elf_get_dynamic_reloc_section 2878 (input_bfd, input_section, /*rela?*/ TRUE); 2879 if (sreloc == NULL) 2880 return FALSE; 2881 } 2882 2883 skip = FALSE; 2884 relocate = FALSE; 2885 2886 outrel.r_offset = _bfd_elf_section_offset (output_bfd, 2887 info, 2888 input_section, 2889 rel->r_offset); 2890 if (outrel.r_offset == (bfd_vma) -1) 2891 skip = TRUE; 2892 else if (outrel.r_offset == (bfd_vma) -2) 2893 skip = relocate = TRUE; 2894 outrel.r_offset += (input_section->output_section->vma 2895 + input_section->output_offset); 2896 2897 if (skip) 2898 memset (&outrel, 0, sizeof outrel); 2899 else if ( r_type == R_M32R_10_PCREL_RELA 2900 || r_type == R_M32R_18_PCREL_RELA 2901 || r_type == R_M32R_26_PCREL_RELA 2902 || r_type == R_M32R_REL32) 2903 { 2904 BFD_ASSERT (h != NULL && h->dynindx != -1); 2905 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 2906 outrel.r_addend = rel->r_addend; 2907 } 2908 else 2909 { 2910 /* h->dynindx may be -1 if this symbol was marked to 2911 become local. */ 2912 if (h == NULL 2913 || ((info->symbolic || h->dynindx == -1) 2914 && h->def_regular)) 2915 { 2916 relocate = TRUE; 2917 outrel.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); 2918 outrel.r_addend = relocation + rel->r_addend; 2919 } 2920 else 2921 { 2922 BFD_ASSERT (h->dynindx != -1); 2923 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 2924 outrel.r_addend = relocation + rel->r_addend; 2925 } 2926 } 2927 2928 loc = sreloc->contents; 2929 loc += sreloc->reloc_count * sizeof (Elf32_External_Rela); 2930 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); 2931 ++sreloc->reloc_count; 2932 2933 /* If this reloc is against an external symbol, we do 2934 not want to fiddle with the addend. Otherwise, we 2935 need to include the symbol value so that it becomes 2936 an addend for the dynamic reloc. */ 2937 if (! relocate) 2938 continue; 2939 break; 2940 } 2941 else if (r_type != R_M32R_10_PCREL_RELA) 2942 break; 2943 /* Fall through. */ 2944 2945 case (int) R_M32R_10_PCREL : 2946 r = m32r_elf_do_10_pcrel_reloc (input_bfd, howto, input_section, 2947 contents, offset, 2948 sec, relocation, addend); 2949 goto check_reloc; 2950 2951 case (int) R_M32R_HI16_SLO : 2952 case (int) R_M32R_HI16_ULO : 2953 { 2954 Elf_Internal_Rela *lorel; 2955 2956 /* We allow an arbitrary number of HI16 relocs before the 2957 LO16 reloc. This permits gcc to emit the HI and LO relocs 2958 itself. */ 2959 for (lorel = rel + 1; 2960 (lorel < relend 2961 && (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO 2962 || ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO)); 2963 lorel++) 2964 continue; 2965 if (lorel < relend 2966 && ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16) 2967 { 2968 m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel, 2969 contents, relocation + addend); 2970 r = bfd_reloc_ok; 2971 } 2972 else 2973 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 2974 contents, offset, 2975 relocation, addend); 2976 } 2977 2978 goto check_reloc; 2979 2980 case (int) R_M32R_SDA16_RELA: 2981 case (int) R_M32R_SDA16 : 2982 { 2983 const char *name; 2984 2985 BFD_ASSERT (sec != NULL); 2986 name = bfd_get_section_name (sec->owner, sec); 2987 2988 if ( strcmp (name, ".sdata") == 0 2989 || strcmp (name, ".sbss") == 0 2990 || strcmp (name, ".scommon") == 0) 2991 { 2992 bfd_vma sda_base; 2993 bfd *out_bfd = sec->output_section->owner; 2994 2995 r = m32r_elf_final_sda_base (out_bfd, info, 2996 &errmsg, 2997 &sda_base); 2998 if (r != bfd_reloc_ok) 2999 { 3000 ret = FALSE; 3001 goto check_reloc; 3002 } 3003 3004 /* At this point `relocation' contains the object's 3005 address. */ 3006 relocation -= sda_base; 3007 /* Now it contains the offset from _SDA_BASE_. */ 3008 } 3009 else 3010 { 3011 (*_bfd_error_handler) 3012 (_("%B: The target (%s) of an %s relocation is in the wrong section (%A)"), 3013 input_bfd, 3014 sec, 3015 sym_name, 3016 m32r_elf_howto_table[(int) r_type].name); 3017 /*bfd_set_error (bfd_error_bad_value); ??? why? */ 3018 ret = FALSE; 3019 continue; 3020 } 3021 } 3022 /* Fall through. */ 3023 3024 default : /* OLD_M32R_RELOC */ 3025 3026 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3027 contents, offset, 3028 relocation, addend); 3029 goto check_reloc; 3030 } 3031 3032 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 3033 contents, rel->r_offset, 3034 relocation, rel->r_addend); 3035 3036 } 3037 3038 check_reloc: 3039 3040 if (r != bfd_reloc_ok) 3041 { 3042 /* FIXME: This should be generic enough to go in a utility. */ 3043 const char *name; 3044 3045 if (h != NULL) 3046 name = h->root.root.string; 3047 else 3048 { 3049 name = (bfd_elf_string_from_elf_section 3050 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 3051 if (name == NULL || *name == '\0') 3052 name = bfd_section_name (input_bfd, sec); 3053 } 3054 3055 if (errmsg != NULL) 3056 goto common_error; 3057 3058 switch (r) 3059 { 3060 case bfd_reloc_overflow: 3061 if (! ((*info->callbacks->reloc_overflow) 3062 (info, (h ? &h->root : NULL), name, howto->name, 3063 (bfd_vma) 0, input_bfd, input_section, offset))) 3064 return FALSE; 3065 break; 3066 3067 case bfd_reloc_undefined: 3068 if (! ((*info->callbacks->undefined_symbol) 3069 (info, name, input_bfd, input_section, 3070 offset, TRUE))) 3071 return FALSE; 3072 break; 3073 3074 case bfd_reloc_outofrange: 3075 errmsg = _("internal error: out of range error"); 3076 goto common_error; 3077 3078 case bfd_reloc_notsupported: 3079 errmsg = _("internal error: unsupported relocation error"); 3080 goto common_error; 3081 3082 case bfd_reloc_dangerous: 3083 errmsg = _("internal error: dangerous error"); 3084 goto common_error; 3085 3086 default: 3087 errmsg = _("internal error: unknown error"); 3088 /* fall through */ 3089 3090 common_error: 3091 if (!((*info->callbacks->warning) 3092 (info, errmsg, name, input_bfd, input_section, 3093 offset))) 3094 return FALSE; 3095 break; 3096 } 3097 } 3098 } 3099 3100 return ret; 3101 } 3102 3103 /* Finish up dynamic symbol handling. We set the contents of various 3104 dynamic sections here. */ 3105 3106 static bfd_boolean 3107 m32r_elf_finish_dynamic_symbol (bfd *output_bfd, 3108 struct bfd_link_info *info, 3109 struct elf_link_hash_entry *h, 3110 Elf_Internal_Sym *sym) 3111 { 3112 struct elf_m32r_link_hash_table *htab; 3113 bfd_byte *loc; 3114 3115 #ifdef DEBUG_PIC 3116 printf ("m32r_elf_finish_dynamic_symbol()\n"); 3117 #endif 3118 3119 htab = m32r_elf_hash_table (info); 3120 if (htab == NULL) 3121 return FALSE; 3122 3123 if (h->plt.offset != (bfd_vma) -1) 3124 { 3125 asection *splt; 3126 asection *sgot; 3127 asection *srela; 3128 3129 bfd_vma plt_index; 3130 bfd_vma got_offset; 3131 Elf_Internal_Rela rela; 3132 3133 /* This symbol has an entry in the procedure linkage table. Set 3134 it up. */ 3135 3136 BFD_ASSERT (h->dynindx != -1); 3137 3138 splt = htab->splt; 3139 sgot = htab->sgotplt; 3140 srela = htab->srelplt; 3141 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); 3142 3143 /* Get the index in the procedure linkage table which 3144 corresponds to this symbol. This is the index of this symbol 3145 in all the symbols for which we are making plt entries. The 3146 first entry in the procedure linkage table is reserved. */ 3147 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 3148 3149 /* Get the offset into the .got table of the entry that 3150 corresponds to this function. Each .got entry is 4 bytes. 3151 The first three are reserved. */ 3152 got_offset = (plt_index + 3) * 4; 3153 3154 /* Fill in the entry in the procedure linkage table. */ 3155 if (! info->shared) 3156 { 3157 bfd_put_32 (output_bfd, 3158 (PLT_ENTRY_WORD0b 3159 + (((sgot->output_section->vma 3160 + sgot->output_offset 3161 + got_offset) >> 16) & 0xffff)), 3162 splt->contents + h->plt.offset); 3163 bfd_put_32 (output_bfd, 3164 (PLT_ENTRY_WORD1b 3165 + ((sgot->output_section->vma 3166 + sgot->output_offset 3167 + got_offset) & 0xffff)), 3168 splt->contents + h->plt.offset + 4); 3169 bfd_put_32 (output_bfd, PLT_ENTRY_WORD2, 3170 splt->contents + h->plt.offset + 8); 3171 bfd_put_32 (output_bfd, 3172 (PLT_ENTRY_WORD3 3173 + plt_index * sizeof (Elf32_External_Rela)), 3174 splt->contents + h->plt.offset + 12); 3175 bfd_put_32 (output_bfd, 3176 (PLT_ENTRY_WORD4 3177 + (((unsigned int) ((- (h->plt.offset + 16)) >> 2)) & 0xffffff)), 3178 splt->contents + h->plt.offset + 16); 3179 } 3180 else 3181 { 3182 bfd_put_32 (output_bfd, 3183 PLT_ENTRY_WORD0 + got_offset, 3184 splt->contents + h->plt.offset); 3185 bfd_put_32 (output_bfd, PLT_ENTRY_WORD1, 3186 splt->contents + h->plt.offset + 4); 3187 bfd_put_32 (output_bfd, PLT_ENTRY_WORD2, 3188 splt->contents + h->plt.offset + 8); 3189 bfd_put_32 (output_bfd, 3190 (PLT_ENTRY_WORD3 3191 + plt_index * sizeof (Elf32_External_Rela)), 3192 splt->contents + h->plt.offset + 12); 3193 bfd_put_32 (output_bfd, 3194 (PLT_ENTRY_WORD4 3195 + (((unsigned int) ((- (h->plt.offset + 16)) >> 2)) & 0xffffff)), 3196 splt->contents + h->plt.offset + 16); 3197 } 3198 3199 /* Fill in the entry in the global offset table. */ 3200 bfd_put_32 (output_bfd, 3201 (splt->output_section->vma 3202 + splt->output_offset 3203 + h->plt.offset 3204 + 12), /* same offset */ 3205 sgot->contents + got_offset); 3206 3207 /* Fill in the entry in the .rela.plt section. */ 3208 rela.r_offset = (sgot->output_section->vma 3209 + sgot->output_offset 3210 + got_offset); 3211 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_JMP_SLOT); 3212 rela.r_addend = 0; 3213 loc = srela->contents; 3214 loc += plt_index * sizeof (Elf32_External_Rela); 3215 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3216 3217 if (!h->def_regular) 3218 { 3219 /* Mark the symbol as undefined, rather than as defined in 3220 the .plt section. Leave the value alone. */ 3221 sym->st_shndx = SHN_UNDEF; 3222 } 3223 } 3224 3225 if (h->got.offset != (bfd_vma) -1) 3226 { 3227 asection *sgot; 3228 asection *srela; 3229 Elf_Internal_Rela rela; 3230 3231 /* This symbol has an entry in the global offset table. Set it 3232 up. */ 3233 3234 sgot = htab->sgot; 3235 srela = htab->srelgot; 3236 BFD_ASSERT (sgot != NULL && srela != NULL); 3237 3238 rela.r_offset = (sgot->output_section->vma 3239 + sgot->output_offset 3240 + (h->got.offset &~ 1)); 3241 3242 /* If this is a -Bsymbolic link, and the symbol is defined 3243 locally, we just want to emit a RELATIVE reloc. Likewise if 3244 the symbol was forced to be local because of a version file. 3245 The entry in the global offset table will already have been 3246 initialized in the relocate_section function. */ 3247 if (info->shared 3248 && (info->symbolic 3249 || h->dynindx == -1 3250 || h->forced_local) 3251 && h->def_regular) 3252 { 3253 rela.r_info = ELF32_R_INFO (0, R_M32R_RELATIVE); 3254 rela.r_addend = (h->root.u.def.value 3255 + h->root.u.def.section->output_section->vma 3256 + h->root.u.def.section->output_offset); 3257 } 3258 else 3259 { 3260 BFD_ASSERT ((h->got.offset & 1) == 0); 3261 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); 3262 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_GLOB_DAT); 3263 rela.r_addend = 0; 3264 } 3265 3266 loc = srela->contents; 3267 loc += srela->reloc_count * sizeof (Elf32_External_Rela); 3268 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3269 ++srela->reloc_count; 3270 } 3271 3272 if (h->needs_copy) 3273 { 3274 asection *s; 3275 Elf_Internal_Rela rela; 3276 3277 /* This symbols needs a copy reloc. Set it up. */ 3278 3279 BFD_ASSERT (h->dynindx != -1 3280 && (h->root.type == bfd_link_hash_defined 3281 || h->root.type == bfd_link_hash_defweak)); 3282 3283 s = bfd_get_linker_section (htab->root.dynobj, ".rela.bss"); 3284 BFD_ASSERT (s != NULL); 3285 3286 rela.r_offset = (h->root.u.def.value 3287 + h->root.u.def.section->output_section->vma 3288 + h->root.u.def.section->output_offset); 3289 rela.r_info = ELF32_R_INFO (h->dynindx, R_M32R_COPY); 3290 rela.r_addend = 0; 3291 loc = s->contents; 3292 loc += s->reloc_count * sizeof (Elf32_External_Rela); 3293 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 3294 ++s->reloc_count; 3295 } 3296 3297 /* Mark some specially defined symbols as absolute. */ 3298 if (strcmp (h->root.root.string, "_DYNAMIC") == 0 3299 || 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->sgot->output_section; 3354 goto get_vma; 3355 case DT_JMPREL: 3356 s = htab->srelplt->output_section; 3357 get_vma: 3358 BFD_ASSERT (s != NULL); 3359 dyn.d_un.d_ptr = s->vma; 3360 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3361 break; 3362 3363 case DT_PLTRELSZ: 3364 s = htab->srelplt->output_section; 3365 BFD_ASSERT (s != NULL); 3366 dyn.d_un.d_val = s->size; 3367 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3368 break; 3369 3370 case DT_RELASZ: 3371 /* My reading of the SVR4 ABI indicates that the 3372 procedure linkage table relocs (DT_JMPREL) should be 3373 included in the overall relocs (DT_RELA). This is 3374 what Solaris does. However, UnixWare can not handle 3375 that case. Therefore, we override the DT_RELASZ entry 3376 here to make it not include the JMPREL relocs. Since 3377 the linker script arranges for .rela.plt to follow all 3378 other relocation sections, we don't have to worry 3379 about changing the DT_RELA entry. */ 3380 if (htab->srelplt != NULL) 3381 { 3382 s = htab->srelplt->output_section; 3383 dyn.d_un.d_val -= s->size; 3384 } 3385 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 3386 break; 3387 } 3388 } 3389 3390 /* Fill in the first entry in the procedure linkage table. */ 3391 splt = htab->splt; 3392 if (splt && splt->size > 0) 3393 { 3394 if (info->shared) 3395 { 3396 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents); 3397 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4); 3398 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8); 3399 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12); 3400 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16); 3401 } 3402 else 3403 { 3404 unsigned long addr; 3405 /* addr = .got + 4 */ 3406 addr = sgot->output_section->vma + sgot->output_offset + 4; 3407 bfd_put_32 (output_bfd, 3408 PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), 3409 splt->contents); 3410 bfd_put_32 (output_bfd, 3411 PLT0_ENTRY_WORD1 | (addr & 0xffff), 3412 splt->contents + 4); 3413 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); 3414 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); 3415 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); 3416 } 3417 3418 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 3419 PLT_ENTRY_SIZE; 3420 } 3421 } 3422 3423 /* Fill in the first three entries in the global offset table. */ 3424 if (sgot && sgot->size > 0) 3425 { 3426 if (sdyn == NULL) 3427 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 3428 else 3429 bfd_put_32 (output_bfd, 3430 sdyn->output_section->vma + sdyn->output_offset, 3431 sgot->contents); 3432 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); 3433 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); 3434 3435 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 3436 } 3437 3438 return TRUE; 3439 } 3440 3441 3442 /* Set the right machine number. */ 3443 3444 static bfd_boolean 3445 m32r_elf_object_p (bfd *abfd) 3446 { 3447 switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH) 3448 { 3449 default: 3450 case E_M32R_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32r); break; 3451 case E_M32RX_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32rx); break; 3452 case E_M32R2_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32r2); break; 3453 } 3454 return TRUE; 3455 } 3456 3457 /* Store the machine number in the flags field. */ 3458 3459 static void 3460 m32r_elf_final_write_processing (bfd *abfd, 3461 bfd_boolean linker ATTRIBUTE_UNUSED) 3462 { 3463 unsigned long val; 3464 3465 switch (bfd_get_mach (abfd)) 3466 { 3467 default: 3468 case bfd_mach_m32r: val = E_M32R_ARCH; break; 3469 case bfd_mach_m32rx: val = E_M32RX_ARCH; break; 3470 case bfd_mach_m32r2: val = E_M32R2_ARCH; break; 3471 } 3472 3473 elf_elfheader (abfd)->e_flags &=~ EF_M32R_ARCH; 3474 elf_elfheader (abfd)->e_flags |= val; 3475 } 3476 3477 /* Function to keep M32R specific file flags. */ 3478 3479 static bfd_boolean 3480 m32r_elf_set_private_flags (bfd *abfd, flagword flags) 3481 { 3482 BFD_ASSERT (!elf_flags_init (abfd) 3483 || elf_elfheader (abfd)->e_flags == flags); 3484 3485 elf_elfheader (abfd)->e_flags = flags; 3486 elf_flags_init (abfd) = TRUE; 3487 return TRUE; 3488 } 3489 3490 /* Merge backend specific data from an object file to the output 3491 object file when linking. */ 3492 3493 static bfd_boolean 3494 m32r_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 3495 { 3496 flagword out_flags; 3497 flagword in_flags; 3498 3499 if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour 3500 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 3501 return TRUE; 3502 3503 in_flags = elf_elfheader (ibfd)->e_flags; 3504 out_flags = elf_elfheader (obfd)->e_flags; 3505 3506 if (! elf_flags_init (obfd)) 3507 { 3508 /* If the input is the default architecture then do not 3509 bother setting the flags for the output architecture, 3510 instead allow future merges to do this. If no future 3511 merges ever set these flags then they will retain their 3512 unitialised values, which surprise surprise, correspond 3513 to the default values. */ 3514 if (bfd_get_arch_info (ibfd)->the_default) 3515 return TRUE; 3516 3517 elf_flags_init (obfd) = TRUE; 3518 elf_elfheader (obfd)->e_flags = in_flags; 3519 3520 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) 3521 && bfd_get_arch_info (obfd)->the_default) 3522 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), 3523 bfd_get_mach (ibfd)); 3524 3525 return TRUE; 3526 } 3527 3528 /* Check flag compatibility. */ 3529 if (in_flags == out_flags) 3530 return TRUE; 3531 3532 if ((in_flags & EF_M32R_ARCH) != (out_flags & EF_M32R_ARCH)) 3533 { 3534 if ( ((in_flags & EF_M32R_ARCH) != E_M32R_ARCH) 3535 || ((out_flags & EF_M32R_ARCH) == E_M32R_ARCH) 3536 || ((in_flags & EF_M32R_ARCH) == E_M32R2_ARCH)) 3537 { 3538 (*_bfd_error_handler) 3539 (_("%B: Instruction set mismatch with previous modules"), ibfd); 3540 3541 bfd_set_error (bfd_error_bad_value); 3542 return FALSE; 3543 } 3544 } 3545 3546 return TRUE; 3547 } 3548 3549 /* Display the flags field. */ 3550 3551 static bfd_boolean 3552 m32r_elf_print_private_bfd_data (bfd *abfd, void * ptr) 3553 { 3554 FILE * file = (FILE *) ptr; 3555 3556 BFD_ASSERT (abfd != NULL && ptr != NULL); 3557 3558 _bfd_elf_print_private_bfd_data (abfd, ptr); 3559 3560 fprintf (file, _("private flags = %lx"), elf_elfheader (abfd)->e_flags); 3561 3562 switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH) 3563 { 3564 default: 3565 case E_M32R_ARCH: fprintf (file, _(": m32r instructions")); break; 3566 case E_M32RX_ARCH: fprintf (file, _(": m32rx instructions")); break; 3567 case E_M32R2_ARCH: fprintf (file, _(": m32r2 instructions")); break; 3568 } 3569 3570 fputc ('\n', file); 3571 3572 return TRUE; 3573 } 3574 3575 static asection * 3576 m32r_elf_gc_mark_hook (asection *sec, 3577 struct bfd_link_info *info, 3578 Elf_Internal_Rela *rel, 3579 struct elf_link_hash_entry *h, 3580 Elf_Internal_Sym *sym) 3581 { 3582 if (h != NULL) 3583 switch (ELF32_R_TYPE (rel->r_info)) 3584 { 3585 case R_M32R_GNU_VTINHERIT: 3586 case R_M32R_GNU_VTENTRY: 3587 case R_M32R_RELA_GNU_VTINHERIT: 3588 case R_M32R_RELA_GNU_VTENTRY: 3589 return NULL; 3590 } 3591 3592 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 3593 } 3594 3595 static bfd_boolean 3596 m32r_elf_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, 3597 struct bfd_link_info *info ATTRIBUTE_UNUSED, 3598 asection *sec ATTRIBUTE_UNUSED, 3599 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) 3600 { 3601 /* Update the got entry reference counts for the section being removed. */ 3602 Elf_Internal_Shdr *symtab_hdr; 3603 struct elf_link_hash_entry **sym_hashes; 3604 bfd_signed_vma *local_got_refcounts; 3605 const Elf_Internal_Rela *rel, *relend; 3606 3607 if (info->relocatable) 3608 return TRUE; 3609 3610 elf_section_data (sec)->local_dynrel = NULL; 3611 3612 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 3613 sym_hashes = elf_sym_hashes (abfd); 3614 local_got_refcounts = elf_local_got_refcounts (abfd); 3615 3616 relend = relocs + sec->reloc_count; 3617 for (rel = relocs; rel < relend; rel++) 3618 { 3619 unsigned long r_symndx; 3620 struct elf_link_hash_entry *h = NULL; 3621 3622 r_symndx = ELF32_R_SYM (rel->r_info); 3623 if (r_symndx >= symtab_hdr->sh_info) 3624 { 3625 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3626 while (h->root.type == bfd_link_hash_indirect 3627 || h->root.type == bfd_link_hash_warning) 3628 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3629 } 3630 3631 switch (ELF32_R_TYPE (rel->r_info)) 3632 { 3633 case R_M32R_GOT16_HI_ULO: 3634 case R_M32R_GOT16_HI_SLO: 3635 case R_M32R_GOT16_LO: 3636 case R_M32R_GOTOFF: 3637 case R_M32R_GOTOFF_HI_ULO: 3638 case R_M32R_GOTOFF_HI_SLO: 3639 case R_M32R_GOTOFF_LO: 3640 case R_M32R_GOT24: 3641 case R_M32R_GOTPC_HI_ULO: 3642 case R_M32R_GOTPC_HI_SLO: 3643 case R_M32R_GOTPC_LO: 3644 case R_M32R_GOTPC24: 3645 if (h != NULL) 3646 { 3647 if (h->got.refcount > 0) 3648 h->got.refcount--; 3649 } 3650 else 3651 { 3652 if (local_got_refcounts && local_got_refcounts[r_symndx] > 0) 3653 local_got_refcounts[r_symndx]--; 3654 } 3655 break; 3656 3657 case R_M32R_16_RELA: 3658 case R_M32R_24_RELA: 3659 case R_M32R_32_RELA: 3660 case R_M32R_REL32: 3661 case R_M32R_HI16_ULO_RELA: 3662 case R_M32R_HI16_SLO_RELA: 3663 case R_M32R_LO16_RELA: 3664 case R_M32R_SDA16_RELA: 3665 case R_M32R_10_PCREL_RELA: 3666 case R_M32R_18_PCREL_RELA: 3667 case R_M32R_26_PCREL_RELA: 3668 if (h != NULL) 3669 { 3670 struct elf_m32r_link_hash_entry *eh; 3671 struct elf_m32r_dyn_relocs **pp; 3672 struct elf_m32r_dyn_relocs *p; 3673 3674 if (!info->shared && h->plt.refcount > 0) 3675 h->plt.refcount -= 1; 3676 3677 eh = (struct elf_m32r_link_hash_entry *) h; 3678 3679 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 3680 if (p->sec == sec) 3681 { 3682 if ( ELF32_R_TYPE (rel->r_info) == R_M32R_26_PCREL_RELA 3683 || ELF32_R_TYPE (rel->r_info) == R_M32R_18_PCREL_RELA 3684 || ELF32_R_TYPE (rel->r_info) == R_M32R_10_PCREL_RELA 3685 || ELF32_R_TYPE (rel->r_info) == R_M32R_REL32) 3686 p->pc_count -= 1; 3687 p->count -= 1; 3688 if (p->count == 0) 3689 *pp = p->next; 3690 break; 3691 } 3692 } 3693 break; 3694 3695 case R_M32R_26_PLTREL: 3696 if (h != NULL) 3697 { 3698 if (h->plt.refcount > 0) 3699 h->plt.refcount--; 3700 } 3701 break; 3702 3703 default: 3704 break; 3705 } 3706 } 3707 3708 return TRUE; 3709 } 3710 3711 /* Look through the relocs for a section during the first phase. 3712 Since we don't do .gots or .plts, we just need to consider the 3713 virtual table relocs for gc. */ 3714 3715 static bfd_boolean 3716 m32r_elf_check_relocs (bfd *abfd, 3717 struct bfd_link_info *info, 3718 asection *sec, 3719 const Elf_Internal_Rela *relocs) 3720 { 3721 Elf_Internal_Shdr *symtab_hdr; 3722 struct elf_link_hash_entry **sym_hashes; 3723 const Elf_Internal_Rela *rel; 3724 const Elf_Internal_Rela *rel_end; 3725 struct elf_m32r_link_hash_table *htab; 3726 bfd *dynobj; 3727 asection *sreloc; 3728 3729 if (info->relocatable) 3730 return TRUE; 3731 3732 sreloc = NULL; 3733 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 3734 sym_hashes = elf_sym_hashes (abfd); 3735 3736 htab = m32r_elf_hash_table (info); 3737 if (htab == NULL) 3738 return FALSE; 3739 3740 dynobj = htab->root.dynobj; 3741 3742 rel_end = relocs + sec->reloc_count; 3743 for (rel = relocs; rel < rel_end; rel++) 3744 { 3745 int r_type; 3746 struct elf_link_hash_entry *h; 3747 unsigned long r_symndx; 3748 3749 r_symndx = ELF32_R_SYM (rel->r_info); 3750 r_type = ELF32_R_TYPE (rel->r_info); 3751 if (r_symndx < symtab_hdr->sh_info) 3752 h = NULL; 3753 else 3754 { 3755 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3756 while (h->root.type == bfd_link_hash_indirect 3757 || h->root.type == bfd_link_hash_warning) 3758 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3759 } 3760 3761 /* Some relocs require a global offset table. */ 3762 if (htab->sgot == NULL) 3763 { 3764 switch (r_type) 3765 { 3766 case R_M32R_GOT16_HI_ULO: 3767 case R_M32R_GOT16_HI_SLO: 3768 case R_M32R_GOTOFF: 3769 case R_M32R_GOTOFF_HI_ULO: 3770 case R_M32R_GOTOFF_HI_SLO: 3771 case R_M32R_GOTOFF_LO: 3772 case R_M32R_GOT16_LO: 3773 case R_M32R_GOTPC24: 3774 case R_M32R_GOTPC_HI_ULO: 3775 case R_M32R_GOTPC_HI_SLO: 3776 case R_M32R_GOTPC_LO: 3777 case R_M32R_GOT24: 3778 if (dynobj == NULL) 3779 htab->root.dynobj = dynobj = abfd; 3780 if (! create_got_section (dynobj, info)) 3781 return FALSE; 3782 break; 3783 3784 default: 3785 break; 3786 } 3787 } 3788 3789 switch (r_type) 3790 { 3791 case R_M32R_GOT16_HI_ULO: 3792 case R_M32R_GOT16_HI_SLO: 3793 case R_M32R_GOT16_LO: 3794 case R_M32R_GOT24: 3795 3796 if (h != NULL) 3797 h->got.refcount += 1; 3798 else 3799 { 3800 bfd_signed_vma *local_got_refcounts; 3801 3802 /* This is a global offset table entry for a local 3803 symbol. */ 3804 local_got_refcounts = elf_local_got_refcounts (abfd); 3805 if (local_got_refcounts == NULL) 3806 { 3807 bfd_size_type size; 3808 3809 size = symtab_hdr->sh_info; 3810 size *= sizeof (bfd_signed_vma); 3811 local_got_refcounts = bfd_zalloc (abfd, size); 3812 if (local_got_refcounts == NULL) 3813 return FALSE; 3814 elf_local_got_refcounts (abfd) = local_got_refcounts; 3815 } 3816 local_got_refcounts[r_symndx] += 1; 3817 } 3818 break; 3819 3820 case R_M32R_26_PLTREL: 3821 /* This symbol requires a procedure linkage table entry. We 3822 actually build the entry in adjust_dynamic_symbol, 3823 because this might be a case of linking PIC code without 3824 linking in any dynamic objects, in which case we don't 3825 need to generate a procedure linkage table after all. */ 3826 3827 /* If this is a local symbol, we resolve it directly without 3828 creating a procedure linkage table entry. */ 3829 if (h == NULL) 3830 continue; 3831 3832 if (h->forced_local) 3833 break; 3834 3835 h->needs_plt = 1; 3836 h->plt.refcount += 1; 3837 break; 3838 3839 case R_M32R_16_RELA: 3840 case R_M32R_24_RELA: 3841 case R_M32R_32_RELA: 3842 case R_M32R_REL32: 3843 case R_M32R_HI16_ULO_RELA: 3844 case R_M32R_HI16_SLO_RELA: 3845 case R_M32R_LO16_RELA: 3846 case R_M32R_SDA16_RELA: 3847 case R_M32R_10_PCREL_RELA: 3848 case R_M32R_18_PCREL_RELA: 3849 case R_M32R_26_PCREL_RELA: 3850 3851 if (h != NULL && !info->shared) 3852 { 3853 h->non_got_ref = 1; 3854 h->plt.refcount += 1; 3855 } 3856 3857 /* If we are creating a shared library, and this is a reloc 3858 against a global symbol, or a non PC relative reloc 3859 against a local symbol, then we need to copy the reloc 3860 into the shared library. However, if we are linking with 3861 -Bsymbolic, we do not need to copy a reloc against a 3862 global symbol which is defined in an object we are 3863 including in the link (i.e., DEF_REGULAR is set). At 3864 this point we have not seen all the input files, so it is 3865 possible that DEF_REGULAR is not set now but will be set 3866 later (it is never cleared). We account for that 3867 possibility below by storing information in the 3868 dyn_relocs field of the hash table entry. A similar 3869 situation occurs when creating shared libraries and symbol 3870 visibility changes render the symbol local. 3871 3872 If on the other hand, we are creating an executable, we 3873 may need to keep relocations for symbols satisfied by a 3874 dynamic library if we manage to avoid copy relocs for the 3875 symbol. */ 3876 if ((info->shared 3877 && (sec->flags & SEC_ALLOC) != 0 3878 && (( r_type != R_M32R_26_PCREL_RELA 3879 && r_type != R_M32R_18_PCREL_RELA 3880 && r_type != R_M32R_10_PCREL_RELA 3881 && r_type != R_M32R_REL32) 3882 || (h != NULL 3883 && (! info->symbolic 3884 || h->root.type == bfd_link_hash_defweak 3885 || !h->def_regular)))) 3886 || (!info->shared 3887 && (sec->flags & SEC_ALLOC) != 0 3888 && h != NULL 3889 && (h->root.type == bfd_link_hash_defweak 3890 || !h->def_regular))) 3891 { 3892 struct elf_m32r_dyn_relocs *p; 3893 struct elf_m32r_dyn_relocs **head; 3894 3895 if (dynobj == NULL) 3896 htab->root.dynobj = dynobj = abfd; 3897 3898 /* When creating a shared object, we must copy these 3899 relocs into the output file. We create a reloc 3900 section in dynobj and make room for the reloc. */ 3901 if (sreloc == NULL) 3902 { 3903 sreloc = _bfd_elf_make_dynamic_reloc_section 3904 (sec, dynobj, 2, abfd, /*rela?*/ TRUE); 3905 3906 if (sreloc == NULL) 3907 return FALSE; 3908 } 3909 3910 /* If this is a global symbol, we count the number of 3911 relocations we need for this symbol. */ 3912 if (h != NULL) 3913 head = &((struct elf_m32r_link_hash_entry *) h)->dyn_relocs; 3914 else 3915 { 3916 /* Track dynamic relocs needed for local syms too. */ 3917 asection *s; 3918 void *vpp; 3919 Elf_Internal_Sym *isym; 3920 3921 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 3922 abfd, r_symndx); 3923 if (isym == NULL) 3924 return FALSE; 3925 3926 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 3927 if (s == NULL) 3928 s = sec; 3929 3930 vpp = &elf_section_data (s)->local_dynrel; 3931 head = (struct elf_m32r_dyn_relocs **) vpp; 3932 } 3933 3934 p = *head; 3935 if (p == NULL || p->sec != sec) 3936 { 3937 bfd_size_type amt = sizeof (*p); 3938 3939 p = bfd_alloc (dynobj, amt); 3940 if (p == NULL) 3941 return FALSE; 3942 p->next = *head; 3943 *head = p; 3944 p->sec = sec; 3945 p->count = 0; 3946 p->pc_count = 0; 3947 } 3948 3949 p->count += 1; 3950 if ( ELF32_R_TYPE (rel->r_info) == R_M32R_26_PCREL_RELA 3951 || ELF32_R_TYPE (rel->r_info) == R_M32R_18_PCREL_RELA 3952 || ELF32_R_TYPE (rel->r_info) == R_M32R_10_PCREL_RELA 3953 || ELF32_R_TYPE (rel->r_info) == R_M32R_REL32) 3954 p->pc_count += 1; 3955 } 3956 break; 3957 3958 /* This relocation describes the C++ object vtable hierarchy. 3959 Reconstruct it for later use during GC. */ 3960 case R_M32R_RELA_GNU_VTINHERIT: 3961 case R_M32R_GNU_VTINHERIT: 3962 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 3963 return FALSE; 3964 break; 3965 3966 /* This relocation describes which C++ vtable entries are actually 3967 used. Record for later use during GC. */ 3968 case R_M32R_GNU_VTENTRY: 3969 BFD_ASSERT (h != NULL); 3970 if (h != NULL 3971 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) 3972 return FALSE; 3973 break; 3974 case R_M32R_RELA_GNU_VTENTRY: 3975 BFD_ASSERT (h != NULL); 3976 if (h != NULL 3977 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 3978 return FALSE; 3979 break; 3980 } 3981 } 3982 3983 return TRUE; 3984 } 3985 3986 static const struct bfd_elf_special_section m32r_elf_special_sections[] = 3987 { 3988 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 3989 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 3990 { NULL, 0, 0, 0, 0 } 3991 }; 3992 3993 static enum elf_reloc_type_class 3994 m32r_elf_reloc_type_class (const Elf_Internal_Rela *rela) 3995 { 3996 switch ((int) ELF32_R_TYPE (rela->r_info)) 3997 { 3998 case R_M32R_RELATIVE: return reloc_class_relative; 3999 case R_M32R_JMP_SLOT: return reloc_class_plt; 4000 case R_M32R_COPY: return reloc_class_copy; 4001 default: return reloc_class_normal; 4002 } 4003 } 4004 4005 #define ELF_ARCH bfd_arch_m32r 4006 #define ELF_TARGET_ID M32R_ELF_DATA 4007 #define ELF_MACHINE_CODE EM_M32R 4008 #define ELF_MACHINE_ALT1 EM_CYGNUS_M32R 4009 #define ELF_MAXPAGESIZE 0x1 /* Explicitly requested by Mitsubishi. */ 4010 4011 #define TARGET_BIG_SYM bfd_elf32_m32r_vec 4012 #define TARGET_BIG_NAME "elf32-m32r" 4013 #define TARGET_LITTLE_SYM bfd_elf32_m32rle_vec 4014 #define TARGET_LITTLE_NAME "elf32-m32rle" 4015 4016 #define elf_info_to_howto m32r_info_to_howto 4017 #define elf_info_to_howto_rel m32r_info_to_howto_rel 4018 #define elf_backend_section_from_bfd_section _bfd_m32r_elf_section_from_bfd_section 4019 #define elf_backend_symbol_processing _bfd_m32r_elf_symbol_processing 4020 #define elf_backend_add_symbol_hook m32r_elf_add_symbol_hook 4021 #define elf_backend_relocate_section m32r_elf_relocate_section 4022 #define elf_backend_gc_mark_hook m32r_elf_gc_mark_hook 4023 #define elf_backend_gc_sweep_hook m32r_elf_gc_sweep_hook 4024 #define elf_backend_check_relocs m32r_elf_check_relocs 4025 4026 #define elf_backend_create_dynamic_sections m32r_elf_create_dynamic_sections 4027 #define bfd_elf32_bfd_link_hash_table_create m32r_elf_link_hash_table_create 4028 #define elf_backend_size_dynamic_sections m32r_elf_size_dynamic_sections 4029 #define elf_backend_omit_section_dynsym \ 4030 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) 4031 #define elf_backend_finish_dynamic_sections m32r_elf_finish_dynamic_sections 4032 #define elf_backend_adjust_dynamic_symbol m32r_elf_adjust_dynamic_symbol 4033 #define elf_backend_finish_dynamic_symbol m32r_elf_finish_dynamic_symbol 4034 #define elf_backend_reloc_type_class m32r_elf_reloc_type_class 4035 #define elf_backend_copy_indirect_symbol m32r_elf_copy_indirect_symbol 4036 4037 #define elf_backend_can_gc_sections 1 4038 /*#if !USE_REL 4039 #define elf_backend_rela_normal 1 4040 #endif*/ 4041 #define elf_backend_can_refcount 1 4042 #define elf_backend_want_got_plt 1 4043 #define elf_backend_plt_readonly 1 4044 #define elf_backend_want_plt_sym 0 4045 #define elf_backend_got_header_size 12 4046 4047 #define elf_backend_may_use_rel_p 1 4048 #ifdef USE_M32R_OLD_RELOC 4049 #define elf_backend_default_use_rela_p 0 4050 #define elf_backend_may_use_rela_p 0 4051 #else 4052 #define elf_backend_default_use_rela_p 1 4053 #define elf_backend_may_use_rela_p 1 4054 #endif 4055 4056 #define elf_backend_object_p m32r_elf_object_p 4057 #define elf_backend_final_write_processing m32r_elf_final_write_processing 4058 #define bfd_elf32_bfd_merge_private_bfd_data m32r_elf_merge_private_bfd_data 4059 #define bfd_elf32_bfd_set_private_flags m32r_elf_set_private_flags 4060 #define bfd_elf32_bfd_print_private_bfd_data m32r_elf_print_private_bfd_data 4061 #define elf_backend_special_sections m32r_elf_special_sections 4062 4063 #include "elf32-target.h" 4064 4065 #undef ELF_MAXPAGESIZE 4066 #define ELF_MAXPAGESIZE 0x1000 4067 4068 #undef TARGET_BIG_SYM 4069 #define TARGET_BIG_SYM bfd_elf32_m32rlin_vec 4070 #undef TARGET_BIG_NAME 4071 #define TARGET_BIG_NAME "elf32-m32r-linux" 4072 #undef TARGET_LITTLE_SYM 4073 #define TARGET_LITTLE_SYM bfd_elf32_m32rlelin_vec 4074 #undef TARGET_LITTLE_NAME 4075 #define TARGET_LITTLE_NAME "elf32-m32rle-linux" 4076 #undef elf32_bed 4077 #define elf32_bed elf32_m32r_lin_bed 4078 4079 #include "elf32-target.h" 4080 4081