1/* PowerPC-specific support for 32-bit ELF 2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 3 2004, 2005, 2006 Free Software Foundation, Inc. 4 Written by Ian Lance Taylor, Cygnus Support. 5 6 This file is part of BFD, the Binary File Descriptor library. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 2 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the 20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, 21 Boston, MA 02110-1301, USA. */ 22 23/* This file is based on a preliminary PowerPC ELF ABI. The 24 information may not match the final PowerPC ELF ABI. It includes 25 suggestions from the in-progress Embedded PowerPC ABI, and that 26 information may also not match. */ 27 28#include <stdarg.h> 29#include "bfd.h" 30#include "sysdep.h" 31#include "bfdlink.h" 32#include "libbfd.h" 33#include "elf-bfd.h" 34#include "elf/ppc.h" 35#include "elf32-ppc.h" 36#include "elf-vxworks.h" 37 38/* RELA relocations are used here. */ 39 40static bfd_reloc_status_type ppc_elf_addr16_ha_reloc 41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 42static bfd_reloc_status_type ppc_elf_unhandled_reloc 43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 44 45/* Branch prediction bit for branch taken relocs. */ 46#define BRANCH_PREDICT_BIT 0x200000 47/* Mask to set RA in memory instructions. */ 48#define RA_REGISTER_MASK 0x001f0000 49/* Value to shift register by to insert RA. */ 50#define RA_REGISTER_SHIFT 16 51 52/* The name of the dynamic interpreter. This is put in the .interp 53 section. */ 54#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 55 56/* For old-style PLT. */ 57/* The number of single-slot PLT entries (the rest use two slots). */ 58#define PLT_NUM_SINGLE_ENTRIES 8192 59 60/* For new-style .glink and .plt. */ 61#define GLINK_PLTRESOLVE 16*4 62#define GLINK_ENTRY_SIZE 4*4 63 64/* VxWorks uses its own plt layout, filled in by the static linker. */ 65 66/* The standard VxWorks PLT entry. */ 67#define VXWORKS_PLT_ENTRY_SIZE 32 68static const bfd_vma ppc_elf_vxworks_plt_entry 69 [VXWORKS_PLT_ENTRY_SIZE / 4] = 70 { 71 0x3d800000, /* lis r12,0 */ 72 0x818c0000, /* lwz r12,0(r12) */ 73 0x7d8903a6, /* mtctr r12 */ 74 0x4e800420, /* bctr */ 75 0x39600000, /* li r11,0 */ 76 0x48000000, /* b 14 <.PLT0resolve+0x4> */ 77 0x60000000, /* nop */ 78 0x60000000, /* nop */ 79 }; 80static const bfd_vma ppc_elf_vxworks_pic_plt_entry 81 [VXWORKS_PLT_ENTRY_SIZE / 4] = 82 { 83 0x3d9e0000, /* addis r12,r30,0 */ 84 0x818c0000, /* lwz r12,0(r12) */ 85 0x7d8903a6, /* mtctr r12 */ 86 0x4e800420, /* bctr */ 87 0x39600000, /* li r11,0 */ 88 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */ 89 0x60000000, /* nop */ 90 0x60000000, /* nop */ 91 }; 92 93/* The initial VxWorks PLT entry. */ 94#define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32 95static const bfd_vma ppc_elf_vxworks_plt0_entry 96 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = 97 { 98 0x3d800000, /* lis r12,0 */ 99 0x398c0000, /* addi r12,r12,0 */ 100 0x800c0008, /* lwz r0,8(r12) */ 101 0x7c0903a6, /* mtctr r0 */ 102 0x818c0004, /* lwz r12,4(r12) */ 103 0x4e800420, /* bctr */ 104 0x60000000, /* nop */ 105 0x60000000, /* nop */ 106 }; 107static const bfd_vma ppc_elf_vxworks_pic_plt0_entry 108 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = 109 { 110 0x819e0008, /* lwz r12,8(r30) */ 111 0x7d8903a6, /* mtctr r12 */ 112 0x819e0004, /* lwz r12,4(r30) */ 113 0x4e800420, /* bctr */ 114 0x60000000, /* nop */ 115 0x60000000, /* nop */ 116 0x60000000, /* nop */ 117 0x60000000, /* nop */ 118 }; 119 120/* For executables, we have some additional relocations in 121 .rela.plt.unloaded, for the kernel loader. */ 122 123/* The number of non-JMP_SLOT relocations per PLT0 slot. */ 124#define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3 125/* The number of relocations in the PLTResolve slot. */ 126#define VXWORKS_PLTRESOLVE_RELOCS 2 127/* The number of relocations in the PLTResolve slot when when creating 128 a shared library. */ 129#define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0 130 131/* Some instructions. */ 132#define ADDIS_11_11 0x3d6b0000 133#define ADDIS_11_30 0x3d7e0000 134#define ADDIS_12_12 0x3d8c0000 135#define ADDI_11_11 0x396b0000 136#define ADD_0_11_11 0x7c0b5a14 137#define ADD_11_0_11 0x7d605a14 138#define B 0x48000000 139#define BCL_20_31 0x429f0005 140#define BCTR 0x4e800420 141#define LIS_11 0x3d600000 142#define LIS_12 0x3d800000 143#define LWZU_0_12 0x840c0000 144#define LWZ_0_12 0x800c0000 145#define LWZ_11_11 0x816b0000 146#define LWZ_11_30 0x817e0000 147#define LWZ_12_12 0x818c0000 148#define MFLR_0 0x7c0802a6 149#define MFLR_12 0x7d8802a6 150#define MTCTR_0 0x7c0903a6 151#define MTCTR_11 0x7d6903a6 152#define MTLR_0 0x7c0803a6 153#define NOP 0x60000000 154#define SUB_11_11_12 0x7d6c5850 155 156/* Offset of tp and dtp pointers from start of TLS block. */ 157#define TP_OFFSET 0x7000 158#define DTP_OFFSET 0x8000 159 160static reloc_howto_type *ppc_elf_howto_table[R_PPC_max]; 161 162static reloc_howto_type ppc_elf_howto_raw[] = { 163 /* This reloc does nothing. */ 164 HOWTO (R_PPC_NONE, /* type */ 165 0, /* rightshift */ 166 2, /* size (0 = byte, 1 = short, 2 = long) */ 167 32, /* bitsize */ 168 FALSE, /* pc_relative */ 169 0, /* bitpos */ 170 complain_overflow_bitfield, /* complain_on_overflow */ 171 bfd_elf_generic_reloc, /* special_function */ 172 "R_PPC_NONE", /* name */ 173 FALSE, /* partial_inplace */ 174 0, /* src_mask */ 175 0, /* dst_mask */ 176 FALSE), /* pcrel_offset */ 177 178 /* A standard 32 bit relocation. */ 179 HOWTO (R_PPC_ADDR32, /* type */ 180 0, /* rightshift */ 181 2, /* size (0 = byte, 1 = short, 2 = long) */ 182 32, /* bitsize */ 183 FALSE, /* pc_relative */ 184 0, /* bitpos */ 185 complain_overflow_bitfield, /* complain_on_overflow */ 186 bfd_elf_generic_reloc, /* special_function */ 187 "R_PPC_ADDR32", /* name */ 188 FALSE, /* partial_inplace */ 189 0, /* src_mask */ 190 0xffffffff, /* dst_mask */ 191 FALSE), /* pcrel_offset */ 192 193 /* An absolute 26 bit branch; the lower two bits must be zero. 194 FIXME: we don't check that, we just clear them. */ 195 HOWTO (R_PPC_ADDR24, /* type */ 196 0, /* rightshift */ 197 2, /* size (0 = byte, 1 = short, 2 = long) */ 198 26, /* bitsize */ 199 FALSE, /* pc_relative */ 200 0, /* bitpos */ 201 complain_overflow_bitfield, /* complain_on_overflow */ 202 bfd_elf_generic_reloc, /* special_function */ 203 "R_PPC_ADDR24", /* name */ 204 FALSE, /* partial_inplace */ 205 0, /* src_mask */ 206 0x3fffffc, /* dst_mask */ 207 FALSE), /* pcrel_offset */ 208 209 /* A standard 16 bit relocation. */ 210 HOWTO (R_PPC_ADDR16, /* type */ 211 0, /* rightshift */ 212 1, /* size (0 = byte, 1 = short, 2 = long) */ 213 16, /* bitsize */ 214 FALSE, /* pc_relative */ 215 0, /* bitpos */ 216 complain_overflow_bitfield, /* complain_on_overflow */ 217 bfd_elf_generic_reloc, /* special_function */ 218 "R_PPC_ADDR16", /* name */ 219 FALSE, /* partial_inplace */ 220 0, /* src_mask */ 221 0xffff, /* dst_mask */ 222 FALSE), /* pcrel_offset */ 223 224 /* A 16 bit relocation without overflow. */ 225 HOWTO (R_PPC_ADDR16_LO, /* type */ 226 0, /* rightshift */ 227 1, /* size (0 = byte, 1 = short, 2 = long) */ 228 16, /* bitsize */ 229 FALSE, /* pc_relative */ 230 0, /* bitpos */ 231 complain_overflow_dont,/* complain_on_overflow */ 232 bfd_elf_generic_reloc, /* special_function */ 233 "R_PPC_ADDR16_LO", /* name */ 234 FALSE, /* partial_inplace */ 235 0, /* src_mask */ 236 0xffff, /* dst_mask */ 237 FALSE), /* pcrel_offset */ 238 239 /* The high order 16 bits of an address. */ 240 HOWTO (R_PPC_ADDR16_HI, /* type */ 241 16, /* rightshift */ 242 1, /* size (0 = byte, 1 = short, 2 = long) */ 243 16, /* bitsize */ 244 FALSE, /* pc_relative */ 245 0, /* bitpos */ 246 complain_overflow_dont, /* complain_on_overflow */ 247 bfd_elf_generic_reloc, /* special_function */ 248 "R_PPC_ADDR16_HI", /* name */ 249 FALSE, /* partial_inplace */ 250 0, /* src_mask */ 251 0xffff, /* dst_mask */ 252 FALSE), /* pcrel_offset */ 253 254 /* The high order 16 bits of an address, plus 1 if the contents of 255 the low 16 bits, treated as a signed number, is negative. */ 256 HOWTO (R_PPC_ADDR16_HA, /* type */ 257 16, /* rightshift */ 258 1, /* size (0 = byte, 1 = short, 2 = long) */ 259 16, /* bitsize */ 260 FALSE, /* pc_relative */ 261 0, /* bitpos */ 262 complain_overflow_dont, /* complain_on_overflow */ 263 ppc_elf_addr16_ha_reloc, /* special_function */ 264 "R_PPC_ADDR16_HA", /* name */ 265 FALSE, /* partial_inplace */ 266 0, /* src_mask */ 267 0xffff, /* dst_mask */ 268 FALSE), /* pcrel_offset */ 269 270 /* An absolute 16 bit branch; the lower two bits must be zero. 271 FIXME: we don't check that, we just clear them. */ 272 HOWTO (R_PPC_ADDR14, /* type */ 273 0, /* rightshift */ 274 2, /* size (0 = byte, 1 = short, 2 = long) */ 275 16, /* bitsize */ 276 FALSE, /* pc_relative */ 277 0, /* bitpos */ 278 complain_overflow_bitfield, /* complain_on_overflow */ 279 bfd_elf_generic_reloc, /* special_function */ 280 "R_PPC_ADDR14", /* name */ 281 FALSE, /* partial_inplace */ 282 0, /* src_mask */ 283 0xfffc, /* dst_mask */ 284 FALSE), /* pcrel_offset */ 285 286 /* An absolute 16 bit branch, for which bit 10 should be set to 287 indicate that the branch is expected to be taken. The lower two 288 bits must be zero. */ 289 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */ 290 0, /* rightshift */ 291 2, /* size (0 = byte, 1 = short, 2 = long) */ 292 16, /* bitsize */ 293 FALSE, /* pc_relative */ 294 0, /* bitpos */ 295 complain_overflow_bitfield, /* complain_on_overflow */ 296 bfd_elf_generic_reloc, /* special_function */ 297 "R_PPC_ADDR14_BRTAKEN",/* name */ 298 FALSE, /* partial_inplace */ 299 0, /* src_mask */ 300 0xfffc, /* dst_mask */ 301 FALSE), /* pcrel_offset */ 302 303 /* An absolute 16 bit branch, for which bit 10 should be set to 304 indicate that the branch is not expected to be taken. The lower 305 two bits must be zero. */ 306 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */ 307 0, /* rightshift */ 308 2, /* size (0 = byte, 1 = short, 2 = long) */ 309 16, /* bitsize */ 310 FALSE, /* pc_relative */ 311 0, /* bitpos */ 312 complain_overflow_bitfield, /* complain_on_overflow */ 313 bfd_elf_generic_reloc, /* special_function */ 314 "R_PPC_ADDR14_BRNTAKEN",/* name */ 315 FALSE, /* partial_inplace */ 316 0, /* src_mask */ 317 0xfffc, /* dst_mask */ 318 FALSE), /* pcrel_offset */ 319 320 /* A relative 26 bit branch; the lower two bits must be zero. */ 321 HOWTO (R_PPC_REL24, /* type */ 322 0, /* rightshift */ 323 2, /* size (0 = byte, 1 = short, 2 = long) */ 324 26, /* bitsize */ 325 TRUE, /* pc_relative */ 326 0, /* bitpos */ 327 complain_overflow_signed, /* complain_on_overflow */ 328 bfd_elf_generic_reloc, /* special_function */ 329 "R_PPC_REL24", /* name */ 330 FALSE, /* partial_inplace */ 331 0, /* src_mask */ 332 0x3fffffc, /* dst_mask */ 333 TRUE), /* pcrel_offset */ 334 335 /* A relative 16 bit branch; the lower two bits must be zero. */ 336 HOWTO (R_PPC_REL14, /* type */ 337 0, /* rightshift */ 338 2, /* size (0 = byte, 1 = short, 2 = long) */ 339 16, /* bitsize */ 340 TRUE, /* pc_relative */ 341 0, /* bitpos */ 342 complain_overflow_signed, /* complain_on_overflow */ 343 bfd_elf_generic_reloc, /* special_function */ 344 "R_PPC_REL14", /* name */ 345 FALSE, /* partial_inplace */ 346 0, /* src_mask */ 347 0xfffc, /* dst_mask */ 348 TRUE), /* pcrel_offset */ 349 350 /* A relative 16 bit branch. Bit 10 should be set to indicate that 351 the branch is expected to be taken. The lower two bits must be 352 zero. */ 353 HOWTO (R_PPC_REL14_BRTAKEN, /* type */ 354 0, /* rightshift */ 355 2, /* size (0 = byte, 1 = short, 2 = long) */ 356 16, /* bitsize */ 357 TRUE, /* pc_relative */ 358 0, /* bitpos */ 359 complain_overflow_signed, /* complain_on_overflow */ 360 bfd_elf_generic_reloc, /* special_function */ 361 "R_PPC_REL14_BRTAKEN", /* name */ 362 FALSE, /* partial_inplace */ 363 0, /* src_mask */ 364 0xfffc, /* dst_mask */ 365 TRUE), /* pcrel_offset */ 366 367 /* A relative 16 bit branch. Bit 10 should be set to indicate that 368 the branch is not expected to be taken. The lower two bits must 369 be zero. */ 370 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */ 371 0, /* rightshift */ 372 2, /* size (0 = byte, 1 = short, 2 = long) */ 373 16, /* bitsize */ 374 TRUE, /* pc_relative */ 375 0, /* bitpos */ 376 complain_overflow_signed, /* complain_on_overflow */ 377 bfd_elf_generic_reloc, /* special_function */ 378 "R_PPC_REL14_BRNTAKEN",/* name */ 379 FALSE, /* partial_inplace */ 380 0, /* src_mask */ 381 0xfffc, /* dst_mask */ 382 TRUE), /* pcrel_offset */ 383 384 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the 385 symbol. */ 386 HOWTO (R_PPC_GOT16, /* type */ 387 0, /* rightshift */ 388 1, /* size (0 = byte, 1 = short, 2 = long) */ 389 16, /* bitsize */ 390 FALSE, /* pc_relative */ 391 0, /* bitpos */ 392 complain_overflow_signed, /* complain_on_overflow */ 393 bfd_elf_generic_reloc, /* special_function */ 394 "R_PPC_GOT16", /* name */ 395 FALSE, /* partial_inplace */ 396 0, /* src_mask */ 397 0xffff, /* dst_mask */ 398 FALSE), /* pcrel_offset */ 399 400 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for 401 the symbol. */ 402 HOWTO (R_PPC_GOT16_LO, /* type */ 403 0, /* rightshift */ 404 1, /* size (0 = byte, 1 = short, 2 = long) */ 405 16, /* bitsize */ 406 FALSE, /* pc_relative */ 407 0, /* bitpos */ 408 complain_overflow_dont, /* complain_on_overflow */ 409 bfd_elf_generic_reloc, /* special_function */ 410 "R_PPC_GOT16_LO", /* name */ 411 FALSE, /* partial_inplace */ 412 0, /* src_mask */ 413 0xffff, /* dst_mask */ 414 FALSE), /* pcrel_offset */ 415 416 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for 417 the symbol. */ 418 HOWTO (R_PPC_GOT16_HI, /* type */ 419 16, /* rightshift */ 420 1, /* size (0 = byte, 1 = short, 2 = long) */ 421 16, /* bitsize */ 422 FALSE, /* pc_relative */ 423 0, /* bitpos */ 424 complain_overflow_bitfield, /* complain_on_overflow */ 425 bfd_elf_generic_reloc, /* special_function */ 426 "R_PPC_GOT16_HI", /* name */ 427 FALSE, /* partial_inplace */ 428 0, /* src_mask */ 429 0xffff, /* dst_mask */ 430 FALSE), /* pcrel_offset */ 431 432 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for 433 the symbol. */ 434 HOWTO (R_PPC_GOT16_HA, /* type */ 435 16, /* rightshift */ 436 1, /* size (0 = byte, 1 = short, 2 = long) */ 437 16, /* bitsize */ 438 FALSE, /* pc_relative */ 439 0, /* bitpos */ 440 complain_overflow_bitfield, /* complain_on_overflow */ 441 ppc_elf_addr16_ha_reloc, /* special_function */ 442 "R_PPC_GOT16_HA", /* name */ 443 FALSE, /* partial_inplace */ 444 0, /* src_mask */ 445 0xffff, /* dst_mask */ 446 FALSE), /* pcrel_offset */ 447 448 /* Like R_PPC_REL24, but referring to the procedure linkage table 449 entry for the symbol. */ 450 HOWTO (R_PPC_PLTREL24, /* type */ 451 0, /* rightshift */ 452 2, /* size (0 = byte, 1 = short, 2 = long) */ 453 26, /* bitsize */ 454 TRUE, /* pc_relative */ 455 0, /* bitpos */ 456 complain_overflow_signed, /* complain_on_overflow */ 457 bfd_elf_generic_reloc, /* special_function */ 458 "R_PPC_PLTREL24", /* name */ 459 FALSE, /* partial_inplace */ 460 0, /* src_mask */ 461 0x3fffffc, /* dst_mask */ 462 TRUE), /* pcrel_offset */ 463 464 /* This is used only by the dynamic linker. The symbol should exist 465 both in the object being run and in some shared library. The 466 dynamic linker copies the data addressed by the symbol from the 467 shared library into the object, because the object being 468 run has to have the data at some particular address. */ 469 HOWTO (R_PPC_COPY, /* type */ 470 0, /* rightshift */ 471 2, /* size (0 = byte, 1 = short, 2 = long) */ 472 32, /* bitsize */ 473 FALSE, /* pc_relative */ 474 0, /* bitpos */ 475 complain_overflow_bitfield, /* complain_on_overflow */ 476 bfd_elf_generic_reloc, /* special_function */ 477 "R_PPC_COPY", /* name */ 478 FALSE, /* partial_inplace */ 479 0, /* src_mask */ 480 0, /* dst_mask */ 481 FALSE), /* pcrel_offset */ 482 483 /* Like R_PPC_ADDR32, but used when setting global offset table 484 entries. */ 485 HOWTO (R_PPC_GLOB_DAT, /* type */ 486 0, /* rightshift */ 487 2, /* size (0 = byte, 1 = short, 2 = long) */ 488 32, /* bitsize */ 489 FALSE, /* pc_relative */ 490 0, /* bitpos */ 491 complain_overflow_bitfield, /* complain_on_overflow */ 492 bfd_elf_generic_reloc, /* special_function */ 493 "R_PPC_GLOB_DAT", /* name */ 494 FALSE, /* partial_inplace */ 495 0, /* src_mask */ 496 0xffffffff, /* dst_mask */ 497 FALSE), /* pcrel_offset */ 498 499 /* Marks a procedure linkage table entry for a symbol. */ 500 HOWTO (R_PPC_JMP_SLOT, /* type */ 501 0, /* rightshift */ 502 2, /* size (0 = byte, 1 = short, 2 = long) */ 503 32, /* bitsize */ 504 FALSE, /* pc_relative */ 505 0, /* bitpos */ 506 complain_overflow_bitfield, /* complain_on_overflow */ 507 bfd_elf_generic_reloc, /* special_function */ 508 "R_PPC_JMP_SLOT", /* name */ 509 FALSE, /* partial_inplace */ 510 0, /* src_mask */ 511 0, /* dst_mask */ 512 FALSE), /* pcrel_offset */ 513 514 /* Used only by the dynamic linker. When the object is run, this 515 longword is set to the load address of the object, plus the 516 addend. */ 517 HOWTO (R_PPC_RELATIVE, /* type */ 518 0, /* rightshift */ 519 2, /* size (0 = byte, 1 = short, 2 = long) */ 520 32, /* bitsize */ 521 FALSE, /* pc_relative */ 522 0, /* bitpos */ 523 complain_overflow_bitfield, /* complain_on_overflow */ 524 bfd_elf_generic_reloc, /* special_function */ 525 "R_PPC_RELATIVE", /* name */ 526 FALSE, /* partial_inplace */ 527 0, /* src_mask */ 528 0xffffffff, /* dst_mask */ 529 FALSE), /* pcrel_offset */ 530 531 /* Like R_PPC_REL24, but uses the value of the symbol within the 532 object rather than the final value. Normally used for 533 _GLOBAL_OFFSET_TABLE_. */ 534 HOWTO (R_PPC_LOCAL24PC, /* type */ 535 0, /* rightshift */ 536 2, /* size (0 = byte, 1 = short, 2 = long) */ 537 26, /* bitsize */ 538 TRUE, /* pc_relative */ 539 0, /* bitpos */ 540 complain_overflow_signed, /* complain_on_overflow */ 541 bfd_elf_generic_reloc, /* special_function */ 542 "R_PPC_LOCAL24PC", /* name */ 543 FALSE, /* partial_inplace */ 544 0, /* src_mask */ 545 0x3fffffc, /* dst_mask */ 546 TRUE), /* pcrel_offset */ 547 548 /* Like R_PPC_ADDR32, but may be unaligned. */ 549 HOWTO (R_PPC_UADDR32, /* type */ 550 0, /* rightshift */ 551 2, /* size (0 = byte, 1 = short, 2 = long) */ 552 32, /* bitsize */ 553 FALSE, /* pc_relative */ 554 0, /* bitpos */ 555 complain_overflow_bitfield, /* complain_on_overflow */ 556 bfd_elf_generic_reloc, /* special_function */ 557 "R_PPC_UADDR32", /* name */ 558 FALSE, /* partial_inplace */ 559 0, /* src_mask */ 560 0xffffffff, /* dst_mask */ 561 FALSE), /* pcrel_offset */ 562 563 /* Like R_PPC_ADDR16, but may be unaligned. */ 564 HOWTO (R_PPC_UADDR16, /* type */ 565 0, /* rightshift */ 566 1, /* size (0 = byte, 1 = short, 2 = long) */ 567 16, /* bitsize */ 568 FALSE, /* pc_relative */ 569 0, /* bitpos */ 570 complain_overflow_bitfield, /* complain_on_overflow */ 571 bfd_elf_generic_reloc, /* special_function */ 572 "R_PPC_UADDR16", /* name */ 573 FALSE, /* partial_inplace */ 574 0, /* src_mask */ 575 0xffff, /* dst_mask */ 576 FALSE), /* pcrel_offset */ 577 578 /* 32-bit PC relative */ 579 HOWTO (R_PPC_REL32, /* type */ 580 0, /* rightshift */ 581 2, /* size (0 = byte, 1 = short, 2 = long) */ 582 32, /* bitsize */ 583 TRUE, /* pc_relative */ 584 0, /* bitpos */ 585 complain_overflow_bitfield, /* complain_on_overflow */ 586 bfd_elf_generic_reloc, /* special_function */ 587 "R_PPC_REL32", /* name */ 588 FALSE, /* partial_inplace */ 589 0, /* src_mask */ 590 0xffffffff, /* dst_mask */ 591 TRUE), /* pcrel_offset */ 592 593 /* 32-bit relocation to the symbol's procedure linkage table. 594 FIXME: not supported. */ 595 HOWTO (R_PPC_PLT32, /* type */ 596 0, /* rightshift */ 597 2, /* size (0 = byte, 1 = short, 2 = long) */ 598 32, /* bitsize */ 599 FALSE, /* pc_relative */ 600 0, /* bitpos */ 601 complain_overflow_bitfield, /* complain_on_overflow */ 602 bfd_elf_generic_reloc, /* special_function */ 603 "R_PPC_PLT32", /* name */ 604 FALSE, /* partial_inplace */ 605 0, /* src_mask */ 606 0, /* dst_mask */ 607 FALSE), /* pcrel_offset */ 608 609 /* 32-bit PC relative relocation to the symbol's procedure linkage table. 610 FIXME: not supported. */ 611 HOWTO (R_PPC_PLTREL32, /* type */ 612 0, /* rightshift */ 613 2, /* size (0 = byte, 1 = short, 2 = long) */ 614 32, /* bitsize */ 615 TRUE, /* pc_relative */ 616 0, /* bitpos */ 617 complain_overflow_bitfield, /* complain_on_overflow */ 618 bfd_elf_generic_reloc, /* special_function */ 619 "R_PPC_PLTREL32", /* name */ 620 FALSE, /* partial_inplace */ 621 0, /* src_mask */ 622 0, /* dst_mask */ 623 TRUE), /* pcrel_offset */ 624 625 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for 626 the symbol. */ 627 HOWTO (R_PPC_PLT16_LO, /* type */ 628 0, /* rightshift */ 629 1, /* size (0 = byte, 1 = short, 2 = long) */ 630 16, /* bitsize */ 631 FALSE, /* pc_relative */ 632 0, /* bitpos */ 633 complain_overflow_dont, /* complain_on_overflow */ 634 bfd_elf_generic_reloc, /* special_function */ 635 "R_PPC_PLT16_LO", /* name */ 636 FALSE, /* partial_inplace */ 637 0, /* src_mask */ 638 0xffff, /* dst_mask */ 639 FALSE), /* pcrel_offset */ 640 641 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for 642 the symbol. */ 643 HOWTO (R_PPC_PLT16_HI, /* type */ 644 16, /* rightshift */ 645 1, /* size (0 = byte, 1 = short, 2 = long) */ 646 16, /* bitsize */ 647 FALSE, /* pc_relative */ 648 0, /* bitpos */ 649 complain_overflow_bitfield, /* complain_on_overflow */ 650 bfd_elf_generic_reloc, /* special_function */ 651 "R_PPC_PLT16_HI", /* name */ 652 FALSE, /* partial_inplace */ 653 0, /* src_mask */ 654 0xffff, /* dst_mask */ 655 FALSE), /* pcrel_offset */ 656 657 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for 658 the symbol. */ 659 HOWTO (R_PPC_PLT16_HA, /* type */ 660 16, /* rightshift */ 661 1, /* size (0 = byte, 1 = short, 2 = long) */ 662 16, /* bitsize */ 663 FALSE, /* pc_relative */ 664 0, /* bitpos */ 665 complain_overflow_bitfield, /* complain_on_overflow */ 666 ppc_elf_addr16_ha_reloc, /* special_function */ 667 "R_PPC_PLT16_HA", /* name */ 668 FALSE, /* partial_inplace */ 669 0, /* src_mask */ 670 0xffff, /* dst_mask */ 671 FALSE), /* pcrel_offset */ 672 673 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with 674 small data items. */ 675 HOWTO (R_PPC_SDAREL16, /* type */ 676 0, /* rightshift */ 677 1, /* size (0 = byte, 1 = short, 2 = long) */ 678 16, /* bitsize */ 679 FALSE, /* pc_relative */ 680 0, /* bitpos */ 681 complain_overflow_signed, /* complain_on_overflow */ 682 bfd_elf_generic_reloc, /* special_function */ 683 "R_PPC_SDAREL16", /* name */ 684 FALSE, /* partial_inplace */ 685 0, /* src_mask */ 686 0xffff, /* dst_mask */ 687 FALSE), /* pcrel_offset */ 688 689 /* 16-bit section relative relocation. */ 690 HOWTO (R_PPC_SECTOFF, /* type */ 691 0, /* rightshift */ 692 1, /* size (0 = byte, 1 = short, 2 = long) */ 693 16, /* bitsize */ 694 FALSE, /* pc_relative */ 695 0, /* bitpos */ 696 complain_overflow_bitfield, /* complain_on_overflow */ 697 bfd_elf_generic_reloc, /* special_function */ 698 "R_PPC_SECTOFF", /* name */ 699 FALSE, /* partial_inplace */ 700 0, /* src_mask */ 701 0xffff, /* dst_mask */ 702 FALSE), /* pcrel_offset */ 703 704 /* 16-bit lower half section relative relocation. */ 705 HOWTO (R_PPC_SECTOFF_LO, /* type */ 706 0, /* rightshift */ 707 1, /* size (0 = byte, 1 = short, 2 = long) */ 708 16, /* bitsize */ 709 FALSE, /* pc_relative */ 710 0, /* bitpos */ 711 complain_overflow_dont, /* complain_on_overflow */ 712 bfd_elf_generic_reloc, /* special_function */ 713 "R_PPC_SECTOFF_LO", /* name */ 714 FALSE, /* partial_inplace */ 715 0, /* src_mask */ 716 0xffff, /* dst_mask */ 717 FALSE), /* pcrel_offset */ 718 719 /* 16-bit upper half section relative relocation. */ 720 HOWTO (R_PPC_SECTOFF_HI, /* type */ 721 16, /* rightshift */ 722 1, /* size (0 = byte, 1 = short, 2 = long) */ 723 16, /* bitsize */ 724 FALSE, /* pc_relative */ 725 0, /* bitpos */ 726 complain_overflow_bitfield, /* complain_on_overflow */ 727 bfd_elf_generic_reloc, /* special_function */ 728 "R_PPC_SECTOFF_HI", /* name */ 729 FALSE, /* partial_inplace */ 730 0, /* src_mask */ 731 0xffff, /* dst_mask */ 732 FALSE), /* pcrel_offset */ 733 734 /* 16-bit upper half adjusted section relative relocation. */ 735 HOWTO (R_PPC_SECTOFF_HA, /* type */ 736 16, /* rightshift */ 737 1, /* size (0 = byte, 1 = short, 2 = long) */ 738 16, /* bitsize */ 739 FALSE, /* pc_relative */ 740 0, /* bitpos */ 741 complain_overflow_bitfield, /* complain_on_overflow */ 742 ppc_elf_addr16_ha_reloc, /* special_function */ 743 "R_PPC_SECTOFF_HA", /* name */ 744 FALSE, /* partial_inplace */ 745 0, /* src_mask */ 746 0xffff, /* dst_mask */ 747 FALSE), /* pcrel_offset */ 748 749 /* Marker reloc for TLS. */ 750 HOWTO (R_PPC_TLS, 751 0, /* rightshift */ 752 2, /* size (0 = byte, 1 = short, 2 = long) */ 753 32, /* bitsize */ 754 FALSE, /* pc_relative */ 755 0, /* bitpos */ 756 complain_overflow_dont, /* complain_on_overflow */ 757 bfd_elf_generic_reloc, /* special_function */ 758 "R_PPC_TLS", /* name */ 759 FALSE, /* partial_inplace */ 760 0, /* src_mask */ 761 0, /* dst_mask */ 762 FALSE), /* pcrel_offset */ 763 764 /* Computes the load module index of the load module that contains the 765 definition of its TLS sym. */ 766 HOWTO (R_PPC_DTPMOD32, 767 0, /* rightshift */ 768 2, /* size (0 = byte, 1 = short, 2 = long) */ 769 32, /* bitsize */ 770 FALSE, /* pc_relative */ 771 0, /* bitpos */ 772 complain_overflow_dont, /* complain_on_overflow */ 773 ppc_elf_unhandled_reloc, /* special_function */ 774 "R_PPC_DTPMOD32", /* name */ 775 FALSE, /* partial_inplace */ 776 0, /* src_mask */ 777 0xffffffff, /* dst_mask */ 778 FALSE), /* pcrel_offset */ 779 780 /* Computes a dtv-relative displacement, the difference between the value 781 of sym+add and the base address of the thread-local storage block that 782 contains the definition of sym, minus 0x8000. */ 783 HOWTO (R_PPC_DTPREL32, 784 0, /* rightshift */ 785 2, /* size (0 = byte, 1 = short, 2 = long) */ 786 32, /* bitsize */ 787 FALSE, /* pc_relative */ 788 0, /* bitpos */ 789 complain_overflow_dont, /* complain_on_overflow */ 790 ppc_elf_unhandled_reloc, /* special_function */ 791 "R_PPC_DTPREL32", /* name */ 792 FALSE, /* partial_inplace */ 793 0, /* src_mask */ 794 0xffffffff, /* dst_mask */ 795 FALSE), /* pcrel_offset */ 796 797 /* A 16 bit dtprel reloc. */ 798 HOWTO (R_PPC_DTPREL16, 799 0, /* rightshift */ 800 1, /* size (0 = byte, 1 = short, 2 = long) */ 801 16, /* bitsize */ 802 FALSE, /* pc_relative */ 803 0, /* bitpos */ 804 complain_overflow_signed, /* complain_on_overflow */ 805 ppc_elf_unhandled_reloc, /* special_function */ 806 "R_PPC_DTPREL16", /* name */ 807 FALSE, /* partial_inplace */ 808 0, /* src_mask */ 809 0xffff, /* dst_mask */ 810 FALSE), /* pcrel_offset */ 811 812 /* Like DTPREL16, but no overflow. */ 813 HOWTO (R_PPC_DTPREL16_LO, 814 0, /* rightshift */ 815 1, /* size (0 = byte, 1 = short, 2 = long) */ 816 16, /* bitsize */ 817 FALSE, /* pc_relative */ 818 0, /* bitpos */ 819 complain_overflow_dont, /* complain_on_overflow */ 820 ppc_elf_unhandled_reloc, /* special_function */ 821 "R_PPC_DTPREL16_LO", /* name */ 822 FALSE, /* partial_inplace */ 823 0, /* src_mask */ 824 0xffff, /* dst_mask */ 825 FALSE), /* pcrel_offset */ 826 827 /* Like DTPREL16_LO, but next higher group of 16 bits. */ 828 HOWTO (R_PPC_DTPREL16_HI, 829 16, /* rightshift */ 830 1, /* size (0 = byte, 1 = short, 2 = long) */ 831 16, /* bitsize */ 832 FALSE, /* pc_relative */ 833 0, /* bitpos */ 834 complain_overflow_dont, /* complain_on_overflow */ 835 ppc_elf_unhandled_reloc, /* special_function */ 836 "R_PPC_DTPREL16_HI", /* name */ 837 FALSE, /* partial_inplace */ 838 0, /* src_mask */ 839 0xffff, /* dst_mask */ 840 FALSE), /* pcrel_offset */ 841 842 /* Like DTPREL16_HI, but adjust for low 16 bits. */ 843 HOWTO (R_PPC_DTPREL16_HA, 844 16, /* rightshift */ 845 1, /* size (0 = byte, 1 = short, 2 = long) */ 846 16, /* bitsize */ 847 FALSE, /* pc_relative */ 848 0, /* bitpos */ 849 complain_overflow_dont, /* complain_on_overflow */ 850 ppc_elf_unhandled_reloc, /* special_function */ 851 "R_PPC_DTPREL16_HA", /* name */ 852 FALSE, /* partial_inplace */ 853 0, /* src_mask */ 854 0xffff, /* dst_mask */ 855 FALSE), /* pcrel_offset */ 856 857 /* Computes a tp-relative displacement, the difference between the value of 858 sym+add and the value of the thread pointer (r13). */ 859 HOWTO (R_PPC_TPREL32, 860 0, /* rightshift */ 861 2, /* size (0 = byte, 1 = short, 2 = long) */ 862 32, /* bitsize */ 863 FALSE, /* pc_relative */ 864 0, /* bitpos */ 865 complain_overflow_dont, /* complain_on_overflow */ 866 ppc_elf_unhandled_reloc, /* special_function */ 867 "R_PPC_TPREL32", /* name */ 868 FALSE, /* partial_inplace */ 869 0, /* src_mask */ 870 0xffffffff, /* dst_mask */ 871 FALSE), /* pcrel_offset */ 872 873 /* A 16 bit tprel reloc. */ 874 HOWTO (R_PPC_TPREL16, 875 0, /* rightshift */ 876 1, /* size (0 = byte, 1 = short, 2 = long) */ 877 16, /* bitsize */ 878 FALSE, /* pc_relative */ 879 0, /* bitpos */ 880 complain_overflow_signed, /* complain_on_overflow */ 881 ppc_elf_unhandled_reloc, /* special_function */ 882 "R_PPC_TPREL16", /* name */ 883 FALSE, /* partial_inplace */ 884 0, /* src_mask */ 885 0xffff, /* dst_mask */ 886 FALSE), /* pcrel_offset */ 887 888 /* Like TPREL16, but no overflow. */ 889 HOWTO (R_PPC_TPREL16_LO, 890 0, /* rightshift */ 891 1, /* size (0 = byte, 1 = short, 2 = long) */ 892 16, /* bitsize */ 893 FALSE, /* pc_relative */ 894 0, /* bitpos */ 895 complain_overflow_dont, /* complain_on_overflow */ 896 ppc_elf_unhandled_reloc, /* special_function */ 897 "R_PPC_TPREL16_LO", /* name */ 898 FALSE, /* partial_inplace */ 899 0, /* src_mask */ 900 0xffff, /* dst_mask */ 901 FALSE), /* pcrel_offset */ 902 903 /* Like TPREL16_LO, but next higher group of 16 bits. */ 904 HOWTO (R_PPC_TPREL16_HI, 905 16, /* rightshift */ 906 1, /* size (0 = byte, 1 = short, 2 = long) */ 907 16, /* bitsize */ 908 FALSE, /* pc_relative */ 909 0, /* bitpos */ 910 complain_overflow_dont, /* complain_on_overflow */ 911 ppc_elf_unhandled_reloc, /* special_function */ 912 "R_PPC_TPREL16_HI", /* name */ 913 FALSE, /* partial_inplace */ 914 0, /* src_mask */ 915 0xffff, /* dst_mask */ 916 FALSE), /* pcrel_offset */ 917 918 /* Like TPREL16_HI, but adjust for low 16 bits. */ 919 HOWTO (R_PPC_TPREL16_HA, 920 16, /* rightshift */ 921 1, /* size (0 = byte, 1 = short, 2 = long) */ 922 16, /* bitsize */ 923 FALSE, /* pc_relative */ 924 0, /* bitpos */ 925 complain_overflow_dont, /* complain_on_overflow */ 926 ppc_elf_unhandled_reloc, /* special_function */ 927 "R_PPC_TPREL16_HA", /* name */ 928 FALSE, /* partial_inplace */ 929 0, /* src_mask */ 930 0xffff, /* dst_mask */ 931 FALSE), /* pcrel_offset */ 932 933 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 934 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset 935 to the first entry. */ 936 HOWTO (R_PPC_GOT_TLSGD16, 937 0, /* rightshift */ 938 1, /* size (0 = byte, 1 = short, 2 = long) */ 939 16, /* bitsize */ 940 FALSE, /* pc_relative */ 941 0, /* bitpos */ 942 complain_overflow_signed, /* complain_on_overflow */ 943 ppc_elf_unhandled_reloc, /* special_function */ 944 "R_PPC_GOT_TLSGD16", /* name */ 945 FALSE, /* partial_inplace */ 946 0, /* src_mask */ 947 0xffff, /* dst_mask */ 948 FALSE), /* pcrel_offset */ 949 950 /* Like GOT_TLSGD16, but no overflow. */ 951 HOWTO (R_PPC_GOT_TLSGD16_LO, 952 0, /* rightshift */ 953 1, /* size (0 = byte, 1 = short, 2 = long) */ 954 16, /* bitsize */ 955 FALSE, /* pc_relative */ 956 0, /* bitpos */ 957 complain_overflow_dont, /* complain_on_overflow */ 958 ppc_elf_unhandled_reloc, /* special_function */ 959 "R_PPC_GOT_TLSGD16_LO", /* name */ 960 FALSE, /* partial_inplace */ 961 0, /* src_mask */ 962 0xffff, /* dst_mask */ 963 FALSE), /* pcrel_offset */ 964 965 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ 966 HOWTO (R_PPC_GOT_TLSGD16_HI, 967 16, /* rightshift */ 968 1, /* size (0 = byte, 1 = short, 2 = long) */ 969 16, /* bitsize */ 970 FALSE, /* pc_relative */ 971 0, /* bitpos */ 972 complain_overflow_dont, /* complain_on_overflow */ 973 ppc_elf_unhandled_reloc, /* special_function */ 974 "R_PPC_GOT_TLSGD16_HI", /* name */ 975 FALSE, /* partial_inplace */ 976 0, /* src_mask */ 977 0xffff, /* dst_mask */ 978 FALSE), /* pcrel_offset */ 979 980 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ 981 HOWTO (R_PPC_GOT_TLSGD16_HA, 982 16, /* rightshift */ 983 1, /* size (0 = byte, 1 = short, 2 = long) */ 984 16, /* bitsize */ 985 FALSE, /* pc_relative */ 986 0, /* bitpos */ 987 complain_overflow_dont, /* complain_on_overflow */ 988 ppc_elf_unhandled_reloc, /* special_function */ 989 "R_PPC_GOT_TLSGD16_HA", /* name */ 990 FALSE, /* partial_inplace */ 991 0, /* src_mask */ 992 0xffff, /* dst_mask */ 993 FALSE), /* pcrel_offset */ 994 995 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 996 with values (sym+add)@dtpmod and zero, and computes the offset to the 997 first entry. */ 998 HOWTO (R_PPC_GOT_TLSLD16, 999 0, /* rightshift */ 1000 1, /* size (0 = byte, 1 = short, 2 = long) */ 1001 16, /* bitsize */ 1002 FALSE, /* pc_relative */ 1003 0, /* bitpos */ 1004 complain_overflow_signed, /* complain_on_overflow */ 1005 ppc_elf_unhandled_reloc, /* special_function */ 1006 "R_PPC_GOT_TLSLD16", /* name */ 1007 FALSE, /* partial_inplace */ 1008 0, /* src_mask */ 1009 0xffff, /* dst_mask */ 1010 FALSE), /* pcrel_offset */ 1011 1012 /* Like GOT_TLSLD16, but no overflow. */ 1013 HOWTO (R_PPC_GOT_TLSLD16_LO, 1014 0, /* rightshift */ 1015 1, /* size (0 = byte, 1 = short, 2 = long) */ 1016 16, /* bitsize */ 1017 FALSE, /* pc_relative */ 1018 0, /* bitpos */ 1019 complain_overflow_dont, /* complain_on_overflow */ 1020 ppc_elf_unhandled_reloc, /* special_function */ 1021 "R_PPC_GOT_TLSLD16_LO", /* name */ 1022 FALSE, /* partial_inplace */ 1023 0, /* src_mask */ 1024 0xffff, /* dst_mask */ 1025 FALSE), /* pcrel_offset */ 1026 1027 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ 1028 HOWTO (R_PPC_GOT_TLSLD16_HI, 1029 16, /* rightshift */ 1030 1, /* size (0 = byte, 1 = short, 2 = long) */ 1031 16, /* bitsize */ 1032 FALSE, /* pc_relative */ 1033 0, /* bitpos */ 1034 complain_overflow_dont, /* complain_on_overflow */ 1035 ppc_elf_unhandled_reloc, /* special_function */ 1036 "R_PPC_GOT_TLSLD16_HI", /* name */ 1037 FALSE, /* partial_inplace */ 1038 0, /* src_mask */ 1039 0xffff, /* dst_mask */ 1040 FALSE), /* pcrel_offset */ 1041 1042 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ 1043 HOWTO (R_PPC_GOT_TLSLD16_HA, 1044 16, /* rightshift */ 1045 1, /* size (0 = byte, 1 = short, 2 = long) */ 1046 16, /* bitsize */ 1047 FALSE, /* pc_relative */ 1048 0, /* bitpos */ 1049 complain_overflow_dont, /* complain_on_overflow */ 1050 ppc_elf_unhandled_reloc, /* special_function */ 1051 "R_PPC_GOT_TLSLD16_HA", /* name */ 1052 FALSE, /* partial_inplace */ 1053 0, /* src_mask */ 1054 0xffff, /* dst_mask */ 1055 FALSE), /* pcrel_offset */ 1056 1057 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes 1058 the offset to the entry. */ 1059 HOWTO (R_PPC_GOT_DTPREL16, 1060 0, /* rightshift */ 1061 1, /* size (0 = byte, 1 = short, 2 = long) */ 1062 16, /* bitsize */ 1063 FALSE, /* pc_relative */ 1064 0, /* bitpos */ 1065 complain_overflow_signed, /* complain_on_overflow */ 1066 ppc_elf_unhandled_reloc, /* special_function */ 1067 "R_PPC_GOT_DTPREL16", /* name */ 1068 FALSE, /* partial_inplace */ 1069 0, /* src_mask */ 1070 0xffff, /* dst_mask */ 1071 FALSE), /* pcrel_offset */ 1072 1073 /* Like GOT_DTPREL16, but no overflow. */ 1074 HOWTO (R_PPC_GOT_DTPREL16_LO, 1075 0, /* rightshift */ 1076 1, /* size (0 = byte, 1 = short, 2 = long) */ 1077 16, /* bitsize */ 1078 FALSE, /* pc_relative */ 1079 0, /* bitpos */ 1080 complain_overflow_dont, /* complain_on_overflow */ 1081 ppc_elf_unhandled_reloc, /* special_function */ 1082 "R_PPC_GOT_DTPREL16_LO", /* name */ 1083 FALSE, /* partial_inplace */ 1084 0, /* src_mask */ 1085 0xffff, /* dst_mask */ 1086 FALSE), /* pcrel_offset */ 1087 1088 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */ 1089 HOWTO (R_PPC_GOT_DTPREL16_HI, 1090 16, /* rightshift */ 1091 1, /* size (0 = byte, 1 = short, 2 = long) */ 1092 16, /* bitsize */ 1093 FALSE, /* pc_relative */ 1094 0, /* bitpos */ 1095 complain_overflow_dont, /* complain_on_overflow */ 1096 ppc_elf_unhandled_reloc, /* special_function */ 1097 "R_PPC_GOT_DTPREL16_HI", /* name */ 1098 FALSE, /* partial_inplace */ 1099 0, /* src_mask */ 1100 0xffff, /* dst_mask */ 1101 FALSE), /* pcrel_offset */ 1102 1103 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ 1104 HOWTO (R_PPC_GOT_DTPREL16_HA, 1105 16, /* rightshift */ 1106 1, /* size (0 = byte, 1 = short, 2 = long) */ 1107 16, /* bitsize */ 1108 FALSE, /* pc_relative */ 1109 0, /* bitpos */ 1110 complain_overflow_dont, /* complain_on_overflow */ 1111 ppc_elf_unhandled_reloc, /* special_function */ 1112 "R_PPC_GOT_DTPREL16_HA", /* name */ 1113 FALSE, /* partial_inplace */ 1114 0, /* src_mask */ 1115 0xffff, /* dst_mask */ 1116 FALSE), /* pcrel_offset */ 1117 1118 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the 1119 offset to the entry. */ 1120 HOWTO (R_PPC_GOT_TPREL16, 1121 0, /* rightshift */ 1122 1, /* size (0 = byte, 1 = short, 2 = long) */ 1123 16, /* bitsize */ 1124 FALSE, /* pc_relative */ 1125 0, /* bitpos */ 1126 complain_overflow_signed, /* complain_on_overflow */ 1127 ppc_elf_unhandled_reloc, /* special_function */ 1128 "R_PPC_GOT_TPREL16", /* name */ 1129 FALSE, /* partial_inplace */ 1130 0, /* src_mask */ 1131 0xffff, /* dst_mask */ 1132 FALSE), /* pcrel_offset */ 1133 1134 /* Like GOT_TPREL16, but no overflow. */ 1135 HOWTO (R_PPC_GOT_TPREL16_LO, 1136 0, /* rightshift */ 1137 1, /* size (0 = byte, 1 = short, 2 = long) */ 1138 16, /* bitsize */ 1139 FALSE, /* pc_relative */ 1140 0, /* bitpos */ 1141 complain_overflow_dont, /* complain_on_overflow */ 1142 ppc_elf_unhandled_reloc, /* special_function */ 1143 "R_PPC_GOT_TPREL16_LO", /* name */ 1144 FALSE, /* partial_inplace */ 1145 0, /* src_mask */ 1146 0xffff, /* dst_mask */ 1147 FALSE), /* pcrel_offset */ 1148 1149 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */ 1150 HOWTO (R_PPC_GOT_TPREL16_HI, 1151 16, /* rightshift */ 1152 1, /* size (0 = byte, 1 = short, 2 = long) */ 1153 16, /* bitsize */ 1154 FALSE, /* pc_relative */ 1155 0, /* bitpos */ 1156 complain_overflow_dont, /* complain_on_overflow */ 1157 ppc_elf_unhandled_reloc, /* special_function */ 1158 "R_PPC_GOT_TPREL16_HI", /* name */ 1159 FALSE, /* partial_inplace */ 1160 0, /* src_mask */ 1161 0xffff, /* dst_mask */ 1162 FALSE), /* pcrel_offset */ 1163 1164 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ 1165 HOWTO (R_PPC_GOT_TPREL16_HA, 1166 16, /* rightshift */ 1167 1, /* size (0 = byte, 1 = short, 2 = long) */ 1168 16, /* bitsize */ 1169 FALSE, /* pc_relative */ 1170 0, /* bitpos */ 1171 complain_overflow_dont, /* complain_on_overflow */ 1172 ppc_elf_unhandled_reloc, /* special_function */ 1173 "R_PPC_GOT_TPREL16_HA", /* name */ 1174 FALSE, /* partial_inplace */ 1175 0, /* src_mask */ 1176 0xffff, /* dst_mask */ 1177 FALSE), /* pcrel_offset */ 1178 1179 /* The remaining relocs are from the Embedded ELF ABI, and are not 1180 in the SVR4 ELF ABI. */ 1181 1182 /* 32 bit value resulting from the addend minus the symbol. */ 1183 HOWTO (R_PPC_EMB_NADDR32, /* type */ 1184 0, /* rightshift */ 1185 2, /* size (0 = byte, 1 = short, 2 = long) */ 1186 32, /* bitsize */ 1187 FALSE, /* pc_relative */ 1188 0, /* bitpos */ 1189 complain_overflow_bitfield, /* complain_on_overflow */ 1190 bfd_elf_generic_reloc, /* special_function */ 1191 "R_PPC_EMB_NADDR32", /* name */ 1192 FALSE, /* partial_inplace */ 1193 0, /* src_mask */ 1194 0xffffffff, /* dst_mask */ 1195 FALSE), /* pcrel_offset */ 1196 1197 /* 16 bit value resulting from the addend minus the symbol. */ 1198 HOWTO (R_PPC_EMB_NADDR16, /* type */ 1199 0, /* rightshift */ 1200 1, /* size (0 = byte, 1 = short, 2 = long) */ 1201 16, /* bitsize */ 1202 FALSE, /* pc_relative */ 1203 0, /* bitpos */ 1204 complain_overflow_bitfield, /* complain_on_overflow */ 1205 bfd_elf_generic_reloc, /* special_function */ 1206 "R_PPC_EMB_NADDR16", /* name */ 1207 FALSE, /* partial_inplace */ 1208 0, /* src_mask */ 1209 0xffff, /* dst_mask */ 1210 FALSE), /* pcrel_offset */ 1211 1212 /* 16 bit value resulting from the addend minus the symbol. */ 1213 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */ 1214 0, /* rightshift */ 1215 1, /* size (0 = byte, 1 = short, 2 = long) */ 1216 16, /* bitsize */ 1217 FALSE, /* pc_relative */ 1218 0, /* bitpos */ 1219 complain_overflow_dont,/* complain_on_overflow */ 1220 bfd_elf_generic_reloc, /* special_function */ 1221 "R_PPC_EMB_ADDR16_LO", /* name */ 1222 FALSE, /* partial_inplace */ 1223 0, /* src_mask */ 1224 0xffff, /* dst_mask */ 1225 FALSE), /* pcrel_offset */ 1226 1227 /* The high order 16 bits of the addend minus the symbol. */ 1228 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */ 1229 16, /* rightshift */ 1230 1, /* size (0 = byte, 1 = short, 2 = long) */ 1231 16, /* bitsize */ 1232 FALSE, /* pc_relative */ 1233 0, /* bitpos */ 1234 complain_overflow_dont, /* complain_on_overflow */ 1235 bfd_elf_generic_reloc, /* special_function */ 1236 "R_PPC_EMB_NADDR16_HI", /* name */ 1237 FALSE, /* partial_inplace */ 1238 0, /* src_mask */ 1239 0xffff, /* dst_mask */ 1240 FALSE), /* pcrel_offset */ 1241 1242 /* The high order 16 bits of the result of the addend minus the address, 1243 plus 1 if the contents of the low 16 bits, treated as a signed number, 1244 is negative. */ 1245 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */ 1246 16, /* rightshift */ 1247 1, /* size (0 = byte, 1 = short, 2 = long) */ 1248 16, /* bitsize */ 1249 FALSE, /* pc_relative */ 1250 0, /* bitpos */ 1251 complain_overflow_dont, /* complain_on_overflow */ 1252 ppc_elf_addr16_ha_reloc, /* special_function */ 1253 "R_PPC_EMB_NADDR16_HA", /* name */ 1254 FALSE, /* partial_inplace */ 1255 0, /* src_mask */ 1256 0xffff, /* dst_mask */ 1257 FALSE), /* pcrel_offset */ 1258 1259 /* 16 bit value resulting from allocating a 4 byte word to hold an 1260 address in the .sdata section, and returning the offset from 1261 _SDA_BASE_ for that relocation. */ 1262 HOWTO (R_PPC_EMB_SDAI16, /* type */ 1263 0, /* rightshift */ 1264 1, /* size (0 = byte, 1 = short, 2 = long) */ 1265 16, /* bitsize */ 1266 FALSE, /* pc_relative */ 1267 0, /* bitpos */ 1268 complain_overflow_bitfield, /* complain_on_overflow */ 1269 bfd_elf_generic_reloc, /* special_function */ 1270 "R_PPC_EMB_SDAI16", /* name */ 1271 FALSE, /* partial_inplace */ 1272 0, /* src_mask */ 1273 0xffff, /* dst_mask */ 1274 FALSE), /* pcrel_offset */ 1275 1276 /* 16 bit value resulting from allocating a 4 byte word to hold an 1277 address in the .sdata2 section, and returning the offset from 1278 _SDA2_BASE_ for that relocation. */ 1279 HOWTO (R_PPC_EMB_SDA2I16, /* type */ 1280 0, /* rightshift */ 1281 1, /* size (0 = byte, 1 = short, 2 = long) */ 1282 16, /* bitsize */ 1283 FALSE, /* pc_relative */ 1284 0, /* bitpos */ 1285 complain_overflow_bitfield, /* complain_on_overflow */ 1286 bfd_elf_generic_reloc, /* special_function */ 1287 "R_PPC_EMB_SDA2I16", /* name */ 1288 FALSE, /* partial_inplace */ 1289 0, /* src_mask */ 1290 0xffff, /* dst_mask */ 1291 FALSE), /* pcrel_offset */ 1292 1293 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with 1294 small data items. */ 1295 HOWTO (R_PPC_EMB_SDA2REL, /* type */ 1296 0, /* rightshift */ 1297 1, /* size (0 = byte, 1 = short, 2 = long) */ 1298 16, /* bitsize */ 1299 FALSE, /* pc_relative */ 1300 0, /* bitpos */ 1301 complain_overflow_signed, /* complain_on_overflow */ 1302 bfd_elf_generic_reloc, /* special_function */ 1303 "R_PPC_EMB_SDA2REL", /* name */ 1304 FALSE, /* partial_inplace */ 1305 0, /* src_mask */ 1306 0xffff, /* dst_mask */ 1307 FALSE), /* pcrel_offset */ 1308 1309 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit 1310 signed offset from the appropriate base, and filling in the register 1311 field with the appropriate register (0, 2, or 13). */ 1312 HOWTO (R_PPC_EMB_SDA21, /* type */ 1313 0, /* rightshift */ 1314 2, /* size (0 = byte, 1 = short, 2 = long) */ 1315 16, /* bitsize */ 1316 FALSE, /* pc_relative */ 1317 0, /* bitpos */ 1318 complain_overflow_signed, /* complain_on_overflow */ 1319 bfd_elf_generic_reloc, /* special_function */ 1320 "R_PPC_EMB_SDA21", /* name */ 1321 FALSE, /* partial_inplace */ 1322 0, /* src_mask */ 1323 0xffff, /* dst_mask */ 1324 FALSE), /* pcrel_offset */ 1325 1326 /* Relocation not handled: R_PPC_EMB_MRKREF */ 1327 /* Relocation not handled: R_PPC_EMB_RELSEC16 */ 1328 /* Relocation not handled: R_PPC_EMB_RELST_LO */ 1329 /* Relocation not handled: R_PPC_EMB_RELST_HI */ 1330 /* Relocation not handled: R_PPC_EMB_RELST_HA */ 1331 /* Relocation not handled: R_PPC_EMB_BIT_FLD */ 1332 1333 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling 1334 in the 16 bit signed offset from the appropriate base, and filling in the 1335 register field with the appropriate register (0, 2, or 13). */ 1336 HOWTO (R_PPC_EMB_RELSDA, /* type */ 1337 0, /* rightshift */ 1338 1, /* size (0 = byte, 1 = short, 2 = long) */ 1339 16, /* bitsize */ 1340 TRUE, /* pc_relative */ 1341 0, /* bitpos */ 1342 complain_overflow_signed, /* complain_on_overflow */ 1343 bfd_elf_generic_reloc, /* special_function */ 1344 "R_PPC_EMB_RELSDA", /* name */ 1345 FALSE, /* partial_inplace */ 1346 0, /* src_mask */ 1347 0xffff, /* dst_mask */ 1348 FALSE), /* pcrel_offset */ 1349 1350 /* A 16 bit relative relocation. */ 1351 HOWTO (R_PPC_REL16, /* type */ 1352 0, /* rightshift */ 1353 1, /* size (0 = byte, 1 = short, 2 = long) */ 1354 16, /* bitsize */ 1355 TRUE, /* pc_relative */ 1356 0, /* bitpos */ 1357 complain_overflow_bitfield, /* complain_on_overflow */ 1358 bfd_elf_generic_reloc, /* special_function */ 1359 "R_PPC_REL16", /* name */ 1360 FALSE, /* partial_inplace */ 1361 0, /* src_mask */ 1362 0xffff, /* dst_mask */ 1363 TRUE), /* pcrel_offset */ 1364 1365 /* A 16 bit relative relocation without overflow. */ 1366 HOWTO (R_PPC_REL16_LO, /* type */ 1367 0, /* rightshift */ 1368 1, /* size (0 = byte, 1 = short, 2 = long) */ 1369 16, /* bitsize */ 1370 TRUE, /* pc_relative */ 1371 0, /* bitpos */ 1372 complain_overflow_dont,/* complain_on_overflow */ 1373 bfd_elf_generic_reloc, /* special_function */ 1374 "R_PPC_REL16_LO", /* name */ 1375 FALSE, /* partial_inplace */ 1376 0, /* src_mask */ 1377 0xffff, /* dst_mask */ 1378 TRUE), /* pcrel_offset */ 1379 1380 /* The high order 16 bits of a relative address. */ 1381 HOWTO (R_PPC_REL16_HI, /* type */ 1382 16, /* rightshift */ 1383 1, /* size (0 = byte, 1 = short, 2 = long) */ 1384 16, /* bitsize */ 1385 TRUE, /* pc_relative */ 1386 0, /* bitpos */ 1387 complain_overflow_dont, /* complain_on_overflow */ 1388 bfd_elf_generic_reloc, /* special_function */ 1389 "R_PPC_REL16_HI", /* name */ 1390 FALSE, /* partial_inplace */ 1391 0, /* src_mask */ 1392 0xffff, /* dst_mask */ 1393 TRUE), /* pcrel_offset */ 1394 1395 /* The high order 16 bits of a relative address, plus 1 if the contents of 1396 the low 16 bits, treated as a signed number, is negative. */ 1397 HOWTO (R_PPC_REL16_HA, /* type */ 1398 16, /* rightshift */ 1399 1, /* size (0 = byte, 1 = short, 2 = long) */ 1400 16, /* bitsize */ 1401 TRUE, /* pc_relative */ 1402 0, /* bitpos */ 1403 complain_overflow_dont, /* complain_on_overflow */ 1404 ppc_elf_addr16_ha_reloc, /* special_function */ 1405 "R_PPC_REL16_HA", /* name */ 1406 FALSE, /* partial_inplace */ 1407 0, /* src_mask */ 1408 0xffff, /* dst_mask */ 1409 TRUE), /* pcrel_offset */ 1410 1411 /* GNU extension to record C++ vtable hierarchy. */ 1412 HOWTO (R_PPC_GNU_VTINHERIT, /* type */ 1413 0, /* rightshift */ 1414 0, /* size (0 = byte, 1 = short, 2 = long) */ 1415 0, /* bitsize */ 1416 FALSE, /* pc_relative */ 1417 0, /* bitpos */ 1418 complain_overflow_dont, /* complain_on_overflow */ 1419 NULL, /* special_function */ 1420 "R_PPC_GNU_VTINHERIT", /* name */ 1421 FALSE, /* partial_inplace */ 1422 0, /* src_mask */ 1423 0, /* dst_mask */ 1424 FALSE), /* pcrel_offset */ 1425 1426 /* GNU extension to record C++ vtable member usage. */ 1427 HOWTO (R_PPC_GNU_VTENTRY, /* type */ 1428 0, /* rightshift */ 1429 0, /* size (0 = byte, 1 = short, 2 = long) */ 1430 0, /* bitsize */ 1431 FALSE, /* pc_relative */ 1432 0, /* bitpos */ 1433 complain_overflow_dont, /* complain_on_overflow */ 1434 NULL, /* special_function */ 1435 "R_PPC_GNU_VTENTRY", /* name */ 1436 FALSE, /* partial_inplace */ 1437 0, /* src_mask */ 1438 0, /* dst_mask */ 1439 FALSE), /* pcrel_offset */ 1440 1441 /* Phony reloc to handle AIX style TOC entries. */ 1442 HOWTO (R_PPC_TOC16, /* type */ 1443 0, /* rightshift */ 1444 1, /* size (0 = byte, 1 = short, 2 = long) */ 1445 16, /* bitsize */ 1446 FALSE, /* pc_relative */ 1447 0, /* bitpos */ 1448 complain_overflow_signed, /* complain_on_overflow */ 1449 bfd_elf_generic_reloc, /* special_function */ 1450 "R_PPC_TOC16", /* name */ 1451 FALSE, /* partial_inplace */ 1452 0, /* src_mask */ 1453 0xffff, /* dst_mask */ 1454 FALSE), /* pcrel_offset */ 1455}; 1456 1457/* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ 1458 1459static void 1460ppc_elf_howto_init (void) 1461{ 1462 unsigned int i, type; 1463 1464 for (i = 0; 1465 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); 1466 i++) 1467 { 1468 type = ppc_elf_howto_raw[i].type; 1469 if (type >= (sizeof (ppc_elf_howto_table) 1470 / sizeof (ppc_elf_howto_table[0]))) 1471 abort (); 1472 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; 1473 } 1474} 1475 1476static reloc_howto_type * 1477ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1478 bfd_reloc_code_real_type code) 1479{ 1480 enum elf_ppc_reloc_type r; 1481 1482 /* Initialize howto table if not already done. */ 1483 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 1484 ppc_elf_howto_init (); 1485 1486 switch (code) 1487 { 1488 default: 1489 return NULL; 1490 1491 case BFD_RELOC_NONE: r = R_PPC_NONE; break; 1492 case BFD_RELOC_32: r = R_PPC_ADDR32; break; 1493 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; 1494 case BFD_RELOC_16: r = R_PPC_ADDR16; break; 1495 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; 1496 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; 1497 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; 1498 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break; 1499 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break; 1500 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break; 1501 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break; 1502 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; 1503 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; 1504 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; 1505 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; 1506 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; 1507 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; 1508 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; 1509 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break; 1510 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break; 1511 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break; 1512 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break; 1513 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; 1514 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; 1515 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; 1516 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; 1517 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; 1518 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; 1519 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; 1520 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; 1521 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; 1522 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; 1523 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; 1524 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; 1525 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; 1526 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; 1527 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; 1528 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; 1529 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; 1530 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; 1531 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; 1532 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; 1533 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; 1534 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; 1535 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; 1536 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; 1537 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break; 1538 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break; 1539 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break; 1540 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break; 1541 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break; 1542 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break; 1543 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break; 1544 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break; 1545 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break; 1546 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break; 1547 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break; 1548 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break; 1549 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break; 1550 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break; 1551 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break; 1552 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break; 1553 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break; 1554 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break; 1555 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break; 1556 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break; 1557 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break; 1558 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break; 1559 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break; 1560 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break; 1561 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break; 1562 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break; 1563 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break; 1564 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break; 1565 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break; 1566 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break; 1567 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break; 1568 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break; 1569 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break; 1570 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break; 1571 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break; 1572 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break; 1573 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break; 1574 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break; 1575 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break; 1576 } 1577 1578 return ppc_elf_howto_table[r]; 1579}; 1580 1581/* Set the howto pointer for a PowerPC ELF reloc. */ 1582 1583static void 1584ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 1585 arelent *cache_ptr, 1586 Elf_Internal_Rela *dst) 1587{ 1588 /* Initialize howto table if not already done. */ 1589 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 1590 ppc_elf_howto_init (); 1591 1592 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max); 1593 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)]; 1594} 1595 1596/* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */ 1597 1598static bfd_reloc_status_type 1599ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED, 1600 arelent *reloc_entry, 1601 asymbol *symbol, 1602 void *data ATTRIBUTE_UNUSED, 1603 asection *input_section, 1604 bfd *output_bfd, 1605 char **error_message ATTRIBUTE_UNUSED) 1606{ 1607 bfd_vma relocation; 1608 1609 if (output_bfd != NULL) 1610 { 1611 reloc_entry->address += input_section->output_offset; 1612 return bfd_reloc_ok; 1613 } 1614 1615 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 1616 return bfd_reloc_outofrange; 1617 1618 if (bfd_is_com_section (symbol->section)) 1619 relocation = 0; 1620 else 1621 relocation = symbol->value; 1622 1623 relocation += symbol->section->output_section->vma; 1624 relocation += symbol->section->output_offset; 1625 relocation += reloc_entry->addend; 1626 if (reloc_entry->howto->pc_relative) 1627 relocation -= reloc_entry->address; 1628 1629 reloc_entry->addend += (relocation & 0x8000) << 1; 1630 1631 return bfd_reloc_continue; 1632} 1633 1634static bfd_reloc_status_type 1635ppc_elf_unhandled_reloc (bfd *abfd, 1636 arelent *reloc_entry, 1637 asymbol *symbol, 1638 void *data, 1639 asection *input_section, 1640 bfd *output_bfd, 1641 char **error_message) 1642{ 1643 /* If this is a relocatable link (output_bfd test tells us), just 1644 call the generic function. Any adjustment will be done at final 1645 link time. */ 1646 if (output_bfd != NULL) 1647 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 1648 input_section, output_bfd, error_message); 1649 1650 if (error_message != NULL) 1651 { 1652 static char buf[60]; 1653 sprintf (buf, _("generic linker can't handle %s"), 1654 reloc_entry->howto->name); 1655 *error_message = buf; 1656 } 1657 return bfd_reloc_dangerous; 1658} 1659 1660/* Sections created by the linker. */ 1661 1662typedef struct elf_linker_section 1663{ 1664 /* Pointer to the bfd section. */ 1665 asection *section; 1666 /* Section name. */ 1667 const char *name; 1668 /* Associated bss section name. */ 1669 const char *bss_name; 1670 /* Associated symbol name. */ 1671 const char *sym_name; 1672 /* Associated symbol. */ 1673 struct elf_link_hash_entry *sym; 1674} elf_linker_section_t; 1675 1676/* Linked list of allocated pointer entries. This hangs off of the 1677 symbol lists, and provides allows us to return different pointers, 1678 based on different addend's. */ 1679 1680typedef struct elf_linker_section_pointers 1681{ 1682 /* next allocated pointer for this symbol */ 1683 struct elf_linker_section_pointers *next; 1684 /* offset of pointer from beginning of section */ 1685 bfd_vma offset; 1686 /* addend used */ 1687 bfd_vma addend; 1688 /* which linker section this is */ 1689 elf_linker_section_t *lsect; 1690} elf_linker_section_pointers_t; 1691 1692struct ppc_elf_obj_tdata 1693{ 1694 struct elf_obj_tdata elf; 1695 1696 /* A mapping from local symbols to offsets into the various linker 1697 sections added. This is index by the symbol index. */ 1698 elf_linker_section_pointers_t **linker_section_pointers; 1699}; 1700 1701#define ppc_elf_tdata(bfd) \ 1702 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any) 1703 1704#define elf_local_ptr_offsets(bfd) \ 1705 (ppc_elf_tdata (bfd)->linker_section_pointers) 1706 1707/* Override the generic function because we store some extras. */ 1708 1709static bfd_boolean 1710ppc_elf_mkobject (bfd *abfd) 1711{ 1712 if (abfd->tdata.any == NULL) 1713 { 1714 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata); 1715 abfd->tdata.any = bfd_zalloc (abfd, amt); 1716 if (abfd->tdata.any == NULL) 1717 return FALSE; 1718 } 1719 return bfd_elf_mkobject (abfd); 1720} 1721 1722/* Fix bad default arch selected for a 32 bit input bfd when the 1723 default is 64 bit. */ 1724 1725static bfd_boolean 1726ppc_elf_object_p (bfd *abfd) 1727{ 1728 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64) 1729 { 1730 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); 1731 1732 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32) 1733 { 1734 /* Relies on arch after 64 bit default being 32 bit default. */ 1735 abfd->arch_info = abfd->arch_info->next; 1736 BFD_ASSERT (abfd->arch_info->bits_per_word == 32); 1737 } 1738 } 1739 return TRUE; 1740} 1741 1742/* Function to set whether a module needs the -mrelocatable bit set. */ 1743 1744static bfd_boolean 1745ppc_elf_set_private_flags (bfd *abfd, flagword flags) 1746{ 1747 BFD_ASSERT (!elf_flags_init (abfd) 1748 || elf_elfheader (abfd)->e_flags == flags); 1749 1750 elf_elfheader (abfd)->e_flags = flags; 1751 elf_flags_init (abfd) = TRUE; 1752 return TRUE; 1753} 1754 1755/* Support for core dump NOTE sections. */ 1756 1757static bfd_boolean 1758ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 1759{ 1760 int offset; 1761 unsigned int size; 1762 1763 switch (note->descsz) 1764 { 1765 default: 1766 return FALSE; 1767 1768 case 268: /* Linux/PPC. */ 1769 /* pr_cursig */ 1770 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); 1771 1772 /* pr_pid */ 1773 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); 1774 1775 /* pr_reg */ 1776 offset = 72; 1777 size = 192; 1778 1779 break; 1780 } 1781 1782 /* Make a ".reg/999" section. */ 1783 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 1784 size, note->descpos + offset); 1785} 1786 1787static bfd_boolean 1788ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 1789{ 1790 switch (note->descsz) 1791 { 1792 default: 1793 return FALSE; 1794 1795 case 128: /* Linux/PPC elf_prpsinfo. */ 1796 elf_tdata (abfd)->core_program 1797 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); 1798 elf_tdata (abfd)->core_command 1799 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); 1800 } 1801 1802 /* Note that for some reason, a spurious space is tacked 1803 onto the end of the args in some (at least one anyway) 1804 implementations, so strip it off if it exists. */ 1805 1806 { 1807 char *command = elf_tdata (abfd)->core_command; 1808 int n = strlen (command); 1809 1810 if (0 < n && command[n - 1] == ' ') 1811 command[n - 1] = '\0'; 1812 } 1813 1814 return TRUE; 1815} 1816 1817static char * 1818ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...) 1819{ 1820 switch (note_type) 1821 { 1822 default: 1823 return NULL; 1824 1825 case NT_PRPSINFO: 1826 { 1827 char data[128]; 1828 va_list ap; 1829 1830 va_start (ap, note_type); 1831 memset (data, 0, 32); 1832 strncpy (data + 32, va_arg (ap, const char *), 16); 1833 strncpy (data + 48, va_arg (ap, const char *), 80); 1834 va_end (ap); 1835 return elfcore_write_note (abfd, buf, bufsiz, 1836 "CORE", note_type, data, sizeof (data)); 1837 } 1838 1839 case NT_PRSTATUS: 1840 { 1841 char data[268]; 1842 va_list ap; 1843 long pid; 1844 int cursig; 1845 const void *greg; 1846 1847 va_start (ap, note_type); 1848 memset (data, 0, 72); 1849 pid = va_arg (ap, long); 1850 bfd_put_32 (abfd, pid, data + 24); 1851 cursig = va_arg (ap, int); 1852 bfd_put_16 (abfd, cursig, data + 12); 1853 greg = va_arg (ap, const void *); 1854 memcpy (data + 72, greg, 192); 1855 memset (data + 264, 0, 4); 1856 va_end (ap); 1857 return elfcore_write_note (abfd, buf, bufsiz, 1858 "CORE", note_type, data, sizeof (data)); 1859 } 1860 } 1861} 1862 1863/* Return address for Ith PLT stub in section PLT, for relocation REL 1864 or (bfd_vma) -1 if it should not be included. */ 1865 1866static bfd_vma 1867ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, 1868 const asection *plt ATTRIBUTE_UNUSED, 1869 const arelent *rel) 1870{ 1871 return rel->address; 1872} 1873 1874/* Handle a PowerPC specific section when reading an object file. This 1875 is called when bfd_section_from_shdr finds a section with an unknown 1876 type. */ 1877 1878static bfd_boolean 1879ppc_elf_section_from_shdr (bfd *abfd, 1880 Elf_Internal_Shdr *hdr, 1881 const char *name, 1882 int shindex) 1883{ 1884 asection *newsect; 1885 flagword flags; 1886 1887 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) 1888 return FALSE; 1889 1890 newsect = hdr->bfd_section; 1891 flags = bfd_get_section_flags (abfd, newsect); 1892 if (hdr->sh_flags & SHF_EXCLUDE) 1893 flags |= SEC_EXCLUDE; 1894 1895 if (hdr->sh_type == SHT_ORDERED) 1896 flags |= SEC_SORT_ENTRIES; 1897 1898 bfd_set_section_flags (abfd, newsect, flags); 1899 return TRUE; 1900} 1901 1902/* Set up any other section flags and such that may be necessary. */ 1903 1904static bfd_boolean 1905ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, 1906 Elf_Internal_Shdr *shdr, 1907 asection *asect) 1908{ 1909 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE) 1910 shdr->sh_flags |= SHF_EXCLUDE; 1911 1912 if ((asect->flags & SEC_SORT_ENTRIES) != 0) 1913 shdr->sh_type = SHT_ORDERED; 1914 1915 return TRUE; 1916} 1917 1918/* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we 1919 need to bump up the number of section headers. */ 1920 1921static int 1922ppc_elf_additional_program_headers (bfd *abfd, 1923 struct bfd_link_info *info ATTRIBUTE_UNUSED) 1924{ 1925 asection *s; 1926 int ret = 0; 1927 1928 s = bfd_get_section_by_name (abfd, ".sbss2"); 1929 if (s != NULL && (s->flags & SEC_ALLOC) != 0) 1930 ++ret; 1931 1932 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); 1933 if (s != NULL && (s->flags & SEC_ALLOC) != 0) 1934 ++ret; 1935 1936 return ret; 1937} 1938 1939/* Add extra PPC sections -- Note, for now, make .sbss2 and 1940 .PPC.EMB.sbss0 a normal section, and not a bss section so 1941 that the linker doesn't crater when trying to make more than 1942 2 sections. */ 1943 1944static const struct bfd_elf_special_section ppc_elf_special_sections[] = 1945{ 1946 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR }, 1947 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 1948 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC }, 1949 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 1950 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC }, 1951 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC }, 1952 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 }, 1953 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC }, 1954 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC }, 1955 { NULL, 0, 0, 0, 0 } 1956}; 1957 1958/* This is what we want for new plt/got. */ 1959static struct bfd_elf_special_section ppc_alt_plt = 1960 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC }; 1961 1962static const struct bfd_elf_special_section * 1963ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) 1964{ 1965 const struct bfd_elf_special_section *ssect; 1966 1967 /* See if this is one of the special sections. */ 1968 if (sec->name == NULL) 1969 return NULL; 1970 1971 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections, 1972 sec->use_rela_p); 1973 if (ssect != NULL) 1974 { 1975 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0) 1976 ssect = &ppc_alt_plt; 1977 return ssect; 1978 } 1979 1980 return _bfd_elf_get_sec_type_attr (abfd, sec); 1981} 1982 1983/* Very simple linked list structure for recording apuinfo values. */ 1984typedef struct apuinfo_list 1985{ 1986 struct apuinfo_list *next; 1987 unsigned long value; 1988} 1989apuinfo_list; 1990 1991static apuinfo_list *head; 1992 1993 1994static void 1995apuinfo_list_init (void) 1996{ 1997 head = NULL; 1998} 1999 2000static void 2001apuinfo_list_add (unsigned long value) 2002{ 2003 apuinfo_list *entry = head; 2004 2005 while (entry != NULL) 2006 { 2007 if (entry->value == value) 2008 return; 2009 entry = entry->next; 2010 } 2011 2012 entry = bfd_malloc (sizeof (* entry)); 2013 if (entry == NULL) 2014 return; 2015 2016 entry->value = value; 2017 entry->next = head; 2018 head = entry; 2019} 2020 2021static unsigned 2022apuinfo_list_length (void) 2023{ 2024 apuinfo_list *entry; 2025 unsigned long count; 2026 2027 for (entry = head, count = 0; 2028 entry; 2029 entry = entry->next) 2030 ++ count; 2031 2032 return count; 2033} 2034 2035static inline unsigned long 2036apuinfo_list_element (unsigned long number) 2037{ 2038 apuinfo_list * entry; 2039 2040 for (entry = head; 2041 entry && number --; 2042 entry = entry->next) 2043 ; 2044 2045 return entry ? entry->value : 0; 2046} 2047 2048static void 2049apuinfo_list_finish (void) 2050{ 2051 apuinfo_list *entry; 2052 2053 for (entry = head; entry;) 2054 { 2055 apuinfo_list *next = entry->next; 2056 free (entry); 2057 entry = next; 2058 } 2059 2060 head = NULL; 2061} 2062 2063#define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo" 2064#define APUINFO_LABEL "APUinfo" 2065 2066/* Scan the input BFDs and create a linked list of 2067 the APUinfo values that will need to be emitted. */ 2068 2069static void 2070ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info) 2071{ 2072 bfd *ibfd; 2073 asection *asec; 2074 char *buffer; 2075 unsigned num_input_sections; 2076 bfd_size_type output_section_size; 2077 unsigned i; 2078 unsigned num_entries; 2079 unsigned long offset; 2080 unsigned long length; 2081 const char *error_message = NULL; 2082 2083 if (link_info == NULL) 2084 return; 2085 2086 /* Scan the input bfds, looking for apuinfo sections. */ 2087 num_input_sections = 0; 2088 output_section_size = 0; 2089 2090 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) 2091 { 2092 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); 2093 if (asec) 2094 { 2095 ++ num_input_sections; 2096 output_section_size += asec->size; 2097 } 2098 } 2099 2100 /* We need at least one input sections 2101 in order to make merging worthwhile. */ 2102 if (num_input_sections < 1) 2103 return; 2104 2105 /* Just make sure that the output section exists as well. */ 2106 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2107 if (asec == NULL) 2108 return; 2109 2110 /* Allocate a buffer for the contents of the input sections. */ 2111 buffer = bfd_malloc (output_section_size); 2112 if (buffer == NULL) 2113 return; 2114 2115 offset = 0; 2116 apuinfo_list_init (); 2117 2118 /* Read in the input sections contents. */ 2119 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) 2120 { 2121 unsigned long datum; 2122 char *ptr; 2123 2124 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); 2125 if (asec == NULL) 2126 continue; 2127 2128 length = asec->size; 2129 if (length < 24) 2130 { 2131 error_message = _("corrupt or empty %s section in %B"); 2132 goto fail; 2133 } 2134 2135 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0 2136 || (bfd_bread (buffer + offset, length, ibfd) != length)) 2137 { 2138 error_message = _("unable to read in %s section from %B"); 2139 goto fail; 2140 } 2141 2142 /* Process the contents of the section. */ 2143 ptr = buffer + offset; 2144 error_message = _("corrupt %s section in %B"); 2145 2146 /* Verify the contents of the header. Note - we have to 2147 extract the values this way in order to allow for a 2148 host whose endian-ness is different from the target. */ 2149 datum = bfd_get_32 (ibfd, ptr); 2150 if (datum != sizeof APUINFO_LABEL) 2151 goto fail; 2152 2153 datum = bfd_get_32 (ibfd, ptr + 8); 2154 if (datum != 0x2) 2155 goto fail; 2156 2157 if (strcmp (ptr + 12, APUINFO_LABEL) != 0) 2158 goto fail; 2159 2160 /* Get the number of bytes used for apuinfo entries. */ 2161 datum = bfd_get_32 (ibfd, ptr + 4); 2162 if (datum + 20 != length) 2163 goto fail; 2164 2165 /* Make sure that we do not run off the end of the section. */ 2166 if (offset + length > output_section_size) 2167 goto fail; 2168 2169 /* Scan the apuinfo section, building a list of apuinfo numbers. */ 2170 for (i = 0; i < datum; i += 4) 2171 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i)); 2172 2173 /* Update the offset. */ 2174 offset += length; 2175 } 2176 2177 error_message = NULL; 2178 2179 /* Compute the size of the output section. */ 2180 num_entries = apuinfo_list_length (); 2181 output_section_size = 20 + num_entries * 4; 2182 2183 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2184 2185 if (! bfd_set_section_size (abfd, asec, output_section_size)) 2186 ibfd = abfd, 2187 error_message = _("warning: unable to set size of %s section in %B"); 2188 2189 fail: 2190 free (buffer); 2191 2192 if (error_message) 2193 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME); 2194} 2195 2196/* Prevent the output section from accumulating the input sections' 2197 contents. We have already stored this in our linked list structure. */ 2198 2199static bfd_boolean 2200ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED, 2201 struct bfd_link_info *link_info ATTRIBUTE_UNUSED, 2202 asection *asec, 2203 bfd_byte *contents ATTRIBUTE_UNUSED) 2204{ 2205 return (apuinfo_list_length () 2206 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0); 2207} 2208 2209/* Finally we can generate the output section. */ 2210 2211static void 2212ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) 2213{ 2214 bfd_byte *buffer; 2215 asection *asec; 2216 unsigned i; 2217 unsigned num_entries; 2218 bfd_size_type length; 2219 2220 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2221 if (asec == NULL) 2222 return; 2223 2224 if (apuinfo_list_length () == 0) 2225 return; 2226 2227 length = asec->size; 2228 if (length < 20) 2229 return; 2230 2231 buffer = bfd_malloc (length); 2232 if (buffer == NULL) 2233 { 2234 (*_bfd_error_handler) 2235 (_("failed to allocate space for new APUinfo section.")); 2236 return; 2237 } 2238 2239 /* Create the apuinfo header. */ 2240 num_entries = apuinfo_list_length (); 2241 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer); 2242 bfd_put_32 (abfd, num_entries * 4, buffer + 4); 2243 bfd_put_32 (abfd, 0x2, buffer + 8); 2244 strcpy ((char *) buffer + 12, APUINFO_LABEL); 2245 2246 length = 20; 2247 for (i = 0; i < num_entries; i++) 2248 { 2249 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length); 2250 length += 4; 2251 } 2252 2253 if (length != asec->size) 2254 (*_bfd_error_handler) (_("failed to compute new APUinfo section.")); 2255 2256 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length)) 2257 (*_bfd_error_handler) (_("failed to install new APUinfo section.")); 2258 2259 free (buffer); 2260 2261 apuinfo_list_finish (); 2262} 2263 2264/* The following functions are specific to the ELF linker, while 2265 functions above are used generally. They appear in this file more 2266 or less in the order in which they are called. eg. 2267 ppc_elf_check_relocs is called early in the link process, 2268 ppc_elf_finish_dynamic_sections is one of the last functions 2269 called. */ 2270 2271/* The PPC linker needs to keep track of the number of relocs that it 2272 decides to copy as dynamic relocs in check_relocs for each symbol. 2273 This is so that it can later discard them if they are found to be 2274 unnecessary. We store the information in a field extending the 2275 regular ELF linker hash table. */ 2276 2277struct ppc_elf_dyn_relocs 2278{ 2279 struct ppc_elf_dyn_relocs *next; 2280 2281 /* The input section of the reloc. */ 2282 asection *sec; 2283 2284 /* Total number of relocs copied for the input section. */ 2285 bfd_size_type count; 2286 2287 /* Number of pc-relative relocs copied for the input section. */ 2288 bfd_size_type pc_count; 2289}; 2290 2291/* Track PLT entries needed for a given symbol. We might need more 2292 than one glink entry per symbol. */ 2293struct plt_entry 2294{ 2295 struct plt_entry *next; 2296 2297 /* -fPIC uses multiple GOT sections, one per file, called ".got2". 2298 This field stores the offset into .got2 used to initialise the 2299 GOT pointer reg. It will always be at least 32768 (and for 2300 current gcc this is the only offset used). */ 2301 bfd_vma addend; 2302 2303 /* The .got2 section. */ 2304 asection *sec; 2305 2306 /* PLT refcount or offset. */ 2307 union 2308 { 2309 bfd_signed_vma refcount; 2310 bfd_vma offset; 2311 } plt; 2312 2313 /* .glink stub offset. */ 2314 bfd_vma glink_offset; 2315}; 2316 2317/* Of those relocs that might be copied as dynamic relocs, this macro 2318 selects those that must be copied when linking a shared library, 2319 even when the symbol is local. */ 2320 2321#define MUST_BE_DYN_RELOC(RTYPE) \ 2322 ((RTYPE) != R_PPC_REL24 \ 2323 && (RTYPE) != R_PPC_REL14 \ 2324 && (RTYPE) != R_PPC_REL14_BRTAKEN \ 2325 && (RTYPE) != R_PPC_REL14_BRNTAKEN \ 2326 && (RTYPE) != R_PPC_REL32) 2327 2328/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 2329 copying dynamic variables from a shared lib into an app's dynbss 2330 section, and instead use a dynamic relocation to point into the 2331 shared lib. */ 2332#define ELIMINATE_COPY_RELOCS 1 2333 2334/* PPC ELF linker hash entry. */ 2335 2336struct ppc_elf_link_hash_entry 2337{ 2338 struct elf_link_hash_entry elf; 2339 2340 /* If this symbol is used in the linker created sections, the processor 2341 specific backend uses this field to map the field into the offset 2342 from the beginning of the section. */ 2343 elf_linker_section_pointers_t *linker_section_pointer; 2344 2345 /* Track dynamic relocs copied for this symbol. */ 2346 struct ppc_elf_dyn_relocs *dyn_relocs; 2347 2348 /* Contexts in which symbol is used in the GOT (or TOC). 2349 TLS_GD .. TLS_TLS bits are or'd into the mask as the 2350 corresponding relocs are encountered during check_relocs. 2351 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to 2352 indicate the corresponding GOT entry type is not needed. */ 2353#define TLS_GD 1 /* GD reloc. */ 2354#define TLS_LD 2 /* LD reloc. */ 2355#define TLS_TPREL 4 /* TPREL reloc, => IE. */ 2356#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ 2357#define TLS_TLS 16 /* Any TLS reloc. */ 2358#define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */ 2359 char tls_mask; 2360 2361 /* Nonzero if we have seen a small data relocation referring to this 2362 symbol. */ 2363 unsigned char has_sda_refs; 2364}; 2365 2366#define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) 2367 2368enum ppc_elf_plt_type { 2369 PLT_UNSET, 2370 PLT_OLD, 2371 PLT_NEW, 2372 PLT_VXWORKS 2373}; 2374 2375/* PPC ELF linker hash table. */ 2376 2377struct ppc_elf_link_hash_table 2378{ 2379 struct elf_link_hash_table elf; 2380 2381 /* Short-cuts to get to dynamic linker sections. */ 2382 asection *got; 2383 asection *relgot; 2384 asection *glink; 2385 asection *plt; 2386 asection *relplt; 2387 asection *dynbss; 2388 asection *relbss; 2389 asection *dynsbss; 2390 asection *relsbss; 2391 elf_linker_section_t sdata[2]; 2392 asection *sbss; 2393 2394 /* Shortcut to .__tls_get_addr. */ 2395 struct elf_link_hash_entry *tls_get_addr; 2396 2397 /* TLS local dynamic got entry handling. */ 2398 union { 2399 bfd_signed_vma refcount; 2400 bfd_vma offset; 2401 } tlsld_got; 2402 2403 /* Offset of PltResolve function in glink. */ 2404 bfd_vma glink_pltresolve; 2405 2406 /* Size of reserved GOT entries. */ 2407 unsigned int got_header_size; 2408 /* Non-zero if allocating the header left a gap. */ 2409 unsigned int got_gap; 2410 2411 /* The type of PLT we have chosen to use. */ 2412 enum ppc_elf_plt_type plt_type; 2413 2414 /* Whether we can use the new PLT layout. */ 2415 unsigned int can_use_new_plt:1; 2416 2417 /* Set if we should emit symbols for stubs. */ 2418 unsigned int emit_stub_syms:1; 2419 2420 /* Small local sym to section mapping cache. */ 2421 struct sym_sec_cache sym_sec; 2422 2423 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */ 2424 asection *srelplt2; 2425 2426 /* The .got.plt section (VxWorks only)*/ 2427 asection *sgotplt; 2428 2429 /* True if the target system is VxWorks. */ 2430 int is_vxworks; 2431 2432 /* The size of PLT entries. */ 2433 int plt_entry_size; 2434 /* The distance between adjacent PLT slots. */ 2435 int plt_slot_size; 2436 /* The size of the first PLT entry. */ 2437 int plt_initial_entry_size; 2438}; 2439 2440/* Get the PPC ELF linker hash table from a link_info structure. */ 2441 2442#define ppc_elf_hash_table(p) \ 2443 ((struct ppc_elf_link_hash_table *) (p)->hash) 2444 2445/* Create an entry in a PPC ELF linker hash table. */ 2446 2447static struct bfd_hash_entry * 2448ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 2449 struct bfd_hash_table *table, 2450 const char *string) 2451{ 2452 /* Allocate the structure if it has not already been allocated by a 2453 subclass. */ 2454 if (entry == NULL) 2455 { 2456 entry = bfd_hash_allocate (table, 2457 sizeof (struct ppc_elf_link_hash_entry)); 2458 if (entry == NULL) 2459 return entry; 2460 } 2461 2462 /* Call the allocation method of the superclass. */ 2463 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 2464 if (entry != NULL) 2465 { 2466 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL; 2467 ppc_elf_hash_entry (entry)->dyn_relocs = NULL; 2468 ppc_elf_hash_entry (entry)->tls_mask = 0; 2469 } 2470 2471 return entry; 2472} 2473 2474/* Create a PPC ELF linker hash table. */ 2475 2476static struct bfd_link_hash_table * 2477ppc_elf_link_hash_table_create (bfd *abfd) 2478{ 2479 struct ppc_elf_link_hash_table *ret; 2480 2481 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table)); 2482 if (ret == NULL) 2483 return NULL; 2484 2485 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, 2486 ppc_elf_link_hash_newfunc, 2487 sizeof (struct ppc_elf_link_hash_entry))) 2488 { 2489 free (ret); 2490 return NULL; 2491 } 2492 2493 ret->elf.init_plt_refcount.refcount = 0; 2494 ret->elf.init_plt_refcount.glist = NULL; 2495 ret->elf.init_plt_offset.offset = 0; 2496 ret->elf.init_plt_offset.glist = NULL; 2497 2498 ret->sdata[0].name = ".sdata"; 2499 ret->sdata[0].sym_name = "_SDA_BASE_"; 2500 ret->sdata[0].bss_name = ".sbss"; 2501 2502 ret->sdata[1].name = ".sdata2"; 2503 ret->sdata[1].sym_name = "_SDA2_BASE_"; 2504 ret->sdata[1].bss_name = ".sbss2"; 2505 2506 ret->plt_entry_size = 12; 2507 ret->plt_slot_size = 8; 2508 ret->plt_initial_entry_size = 72; 2509 2510 ret->is_vxworks = 0; 2511 2512 return &ret->elf.root; 2513} 2514 2515/* Create .got and the related sections. */ 2516 2517static bfd_boolean 2518ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info) 2519{ 2520 struct ppc_elf_link_hash_table *htab; 2521 asection *s; 2522 flagword flags; 2523 2524 if (!_bfd_elf_create_got_section (abfd, info)) 2525 return FALSE; 2526 2527 htab = ppc_elf_hash_table (info); 2528 htab->got = s = bfd_get_section_by_name (abfd, ".got"); 2529 if (s == NULL) 2530 abort (); 2531 2532 if (htab->is_vxworks) 2533 { 2534 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt"); 2535 if (!htab->sgotplt) 2536 abort (); 2537 } 2538 else 2539 { 2540 /* The powerpc .got has a blrl instruction in it. Mark it 2541 executable. */ 2542 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS 2543 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 2544 if (!bfd_set_section_flags (abfd, s, flags)) 2545 return FALSE; 2546 } 2547 2548 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 2549 | SEC_LINKER_CREATED | SEC_READONLY); 2550 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags); 2551 if (!htab->relgot 2552 || ! bfd_set_section_alignment (abfd, htab->relgot, 2)) 2553 return FALSE; 2554 2555 return TRUE; 2556} 2557 2558/* We have to create .dynsbss and .rela.sbss here so that they get mapped 2559 to output sections (just like _bfd_elf_create_dynamic_sections has 2560 to create .dynbss and .rela.bss). */ 2561 2562static bfd_boolean 2563ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 2564{ 2565 struct ppc_elf_link_hash_table *htab; 2566 asection *s; 2567 flagword flags; 2568 2569 htab = ppc_elf_hash_table (info); 2570 2571 if (htab->got == NULL 2572 && !ppc_elf_create_got (abfd, info)) 2573 return FALSE; 2574 2575 if (!_bfd_elf_create_dynamic_sections (abfd, info)) 2576 return FALSE; 2577 2578 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 2579 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 2580 2581 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE); 2582 htab->glink = s; 2583 if (s == NULL 2584 || !bfd_set_section_alignment (abfd, s, 4)) 2585 return FALSE; 2586 2587 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss"); 2588 s = bfd_make_section_with_flags (abfd, ".dynsbss", 2589 SEC_ALLOC | SEC_LINKER_CREATED); 2590 htab->dynsbss = s; 2591 if (s == NULL) 2592 return FALSE; 2593 2594 if (! info->shared) 2595 { 2596 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss"); 2597 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags); 2598 htab->relsbss = s; 2599 if (s == NULL 2600 || ! bfd_set_section_alignment (abfd, s, 2)) 2601 return FALSE; 2602 } 2603 2604 if (htab->is_vxworks 2605 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2)) 2606 return FALSE; 2607 2608 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt"); 2609 htab->plt = s = bfd_get_section_by_name (abfd, ".plt"); 2610 if (s == NULL) 2611 abort (); 2612 2613 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED; 2614 if (htab->plt_type == PLT_VXWORKS) 2615 /* The VxWorks PLT is a loaded section with contents. */ 2616 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY; 2617 return bfd_set_section_flags (abfd, s, flags); 2618} 2619 2620/* Copy the extra info we tack onto an elf_link_hash_entry. */ 2621 2622static void 2623ppc_elf_copy_indirect_symbol (struct bfd_link_info *info, 2624 struct elf_link_hash_entry *dir, 2625 struct elf_link_hash_entry *ind) 2626{ 2627 struct ppc_elf_link_hash_entry *edir, *eind; 2628 2629 edir = (struct ppc_elf_link_hash_entry *) dir; 2630 eind = (struct ppc_elf_link_hash_entry *) ind; 2631 2632 if (eind->dyn_relocs != NULL) 2633 { 2634 if (edir->dyn_relocs != NULL) 2635 { 2636 struct ppc_elf_dyn_relocs **pp; 2637 struct ppc_elf_dyn_relocs *p; 2638 2639 /* Add reloc counts against the indirect sym to the direct sym 2640 list. Merge any entries against the same section. */ 2641 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 2642 { 2643 struct ppc_elf_dyn_relocs *q; 2644 2645 for (q = edir->dyn_relocs; q != NULL; q = q->next) 2646 if (q->sec == p->sec) 2647 { 2648 q->pc_count += p->pc_count; 2649 q->count += p->count; 2650 *pp = p->next; 2651 break; 2652 } 2653 if (q == NULL) 2654 pp = &p->next; 2655 } 2656 *pp = edir->dyn_relocs; 2657 } 2658 2659 edir->dyn_relocs = eind->dyn_relocs; 2660 eind->dyn_relocs = NULL; 2661 } 2662 2663 edir->tls_mask |= eind->tls_mask; 2664 edir->has_sda_refs |= eind->has_sda_refs; 2665 2666 /* If called to transfer flags for a weakdef during processing 2667 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 2668 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 2669 if (!(ELIMINATE_COPY_RELOCS 2670 && eind->elf.root.type != bfd_link_hash_indirect 2671 && edir->elf.dynamic_adjusted)) 2672 edir->elf.non_got_ref |= eind->elf.non_got_ref; 2673 2674 edir->elf.ref_dynamic |= eind->elf.ref_dynamic; 2675 edir->elf.ref_regular |= eind->elf.ref_regular; 2676 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; 2677 edir->elf.needs_plt |= eind->elf.needs_plt; 2678 2679 /* If we were called to copy over info for a weak sym, that's all. */ 2680 if (eind->elf.root.type != bfd_link_hash_indirect) 2681 return; 2682 2683 /* Copy over the GOT refcount entries that we may have already seen to 2684 the symbol which just became indirect. */ 2685 edir->elf.got.refcount += eind->elf.got.refcount; 2686 eind->elf.got.refcount = 0; 2687 2688 /* And plt entries. */ 2689 if (eind->elf.plt.plist != NULL) 2690 { 2691 if (edir->elf.plt.plist != NULL) 2692 { 2693 struct plt_entry **entp; 2694 struct plt_entry *ent; 2695 2696 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; ) 2697 { 2698 struct plt_entry *dent; 2699 2700 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next) 2701 if (dent->sec == ent->sec && dent->addend == ent->addend) 2702 { 2703 dent->plt.refcount += ent->plt.refcount; 2704 *entp = ent->next; 2705 break; 2706 } 2707 if (dent == NULL) 2708 entp = &ent->next; 2709 } 2710 *entp = edir->elf.plt.plist; 2711 } 2712 2713 edir->elf.plt.plist = eind->elf.plt.plist; 2714 eind->elf.plt.plist = NULL; 2715 } 2716 2717 if (eind->elf.dynindx != -1) 2718 { 2719 if (edir->elf.dynindx != -1) 2720 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 2721 edir->elf.dynstr_index); 2722 edir->elf.dynindx = eind->elf.dynindx; 2723 edir->elf.dynstr_index = eind->elf.dynstr_index; 2724 eind->elf.dynindx = -1; 2725 eind->elf.dynstr_index = 0; 2726 } 2727} 2728 2729/* Return 1 if target is one of ours. */ 2730 2731static bfd_boolean 2732is_ppc_elf_target (const struct bfd_target *targ) 2733{ 2734 extern const bfd_target bfd_elf32_powerpc_vec; 2735 extern const bfd_target bfd_elf32_powerpc_vxworks_vec; 2736 extern const bfd_target bfd_elf32_powerpcle_vec; 2737 2738 return (targ == &bfd_elf32_powerpc_vec 2739 || targ == &bfd_elf32_powerpc_vxworks_vec 2740 || targ == &bfd_elf32_powerpcle_vec); 2741} 2742 2743/* Hook called by the linker routine which adds symbols from an object 2744 file. We use it to put .comm items in .sbss, and not .bss. */ 2745 2746static bfd_boolean 2747ppc_elf_add_symbol_hook (bfd *abfd, 2748 struct bfd_link_info *info, 2749 Elf_Internal_Sym *sym, 2750 const char **namep ATTRIBUTE_UNUSED, 2751 flagword *flagsp ATTRIBUTE_UNUSED, 2752 asection **secp, 2753 bfd_vma *valp) 2754{ 2755 if (sym->st_shndx == SHN_COMMON 2756 && !info->relocatable 2757 && sym->st_size <= elf_gp_size (abfd) 2758 && is_ppc_elf_target (info->hash->creator)) 2759 { 2760 /* Common symbols less than or equal to -G nn bytes are automatically 2761 put into .sbss. */ 2762 struct ppc_elf_link_hash_table *htab; 2763 2764 htab = ppc_elf_hash_table (info); 2765 if (htab->sbss == NULL) 2766 { 2767 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED; 2768 2769 if (!htab->elf.dynobj) 2770 htab->elf.dynobj = abfd; 2771 2772 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj, 2773 ".sbss", 2774 flags); 2775 if (htab->sbss == NULL) 2776 return FALSE; 2777 } 2778 2779 *secp = htab->sbss; 2780 *valp = sym->st_size; 2781 } 2782 2783 return TRUE; 2784} 2785 2786static bfd_boolean 2787create_sdata_sym (struct ppc_elf_link_hash_table *htab, 2788 elf_linker_section_t *lsect) 2789{ 2790 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name, 2791 TRUE, FALSE, TRUE); 2792 if (lsect->sym == NULL) 2793 return FALSE; 2794 if (lsect->sym->root.type == bfd_link_hash_new) 2795 lsect->sym->non_elf = 0; 2796 lsect->sym->ref_regular = 1; 2797 return TRUE; 2798} 2799 2800/* Create a special linker section. */ 2801 2802static bfd_boolean 2803ppc_elf_create_linker_section (bfd *abfd, 2804 struct bfd_link_info *info, 2805 flagword flags, 2806 elf_linker_section_t *lsect) 2807{ 2808 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 2809 asection *s; 2810 2811 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 2812 | SEC_LINKER_CREATED); 2813 2814 /* Record the first bfd that needs the special sections. */ 2815 if (!htab->elf.dynobj) 2816 htab->elf.dynobj = abfd; 2817 2818 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj, 2819 lsect->name, 2820 flags); 2821 if (s == NULL 2822 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2)) 2823 return FALSE; 2824 lsect->section = s; 2825 2826 return create_sdata_sym (htab, lsect); 2827} 2828 2829/* Find a linker generated pointer with a given addend and type. */ 2830 2831static elf_linker_section_pointers_t * 2832elf_find_pointer_linker_section 2833 (elf_linker_section_pointers_t *linker_pointers, 2834 bfd_vma addend, 2835 elf_linker_section_t *lsect) 2836{ 2837 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next) 2838 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend) 2839 return linker_pointers; 2840 2841 return NULL; 2842} 2843 2844/* Allocate a pointer to live in a linker created section. */ 2845 2846static bfd_boolean 2847elf_create_pointer_linker_section (bfd *abfd, 2848 elf_linker_section_t *lsect, 2849 struct elf_link_hash_entry *h, 2850 const Elf_Internal_Rela *rel) 2851{ 2852 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; 2853 elf_linker_section_pointers_t *linker_section_ptr; 2854 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 2855 bfd_size_type amt; 2856 2857 BFD_ASSERT (lsect != NULL); 2858 2859 /* Is this a global symbol? */ 2860 if (h != NULL) 2861 { 2862 struct ppc_elf_link_hash_entry *eh; 2863 2864 /* Has this symbol already been allocated? If so, our work is done. */ 2865 eh = (struct ppc_elf_link_hash_entry *) h; 2866 if (elf_find_pointer_linker_section (eh->linker_section_pointer, 2867 rel->r_addend, 2868 lsect)) 2869 return TRUE; 2870 2871 ptr_linker_section_ptr = &eh->linker_section_pointer; 2872 } 2873 else 2874 { 2875 /* Allocation of a pointer to a local symbol. */ 2876 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); 2877 2878 /* Allocate a table to hold the local symbols if first time. */ 2879 if (!ptr) 2880 { 2881 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info; 2882 2883 amt = num_symbols; 2884 amt *= sizeof (elf_linker_section_pointers_t *); 2885 ptr = bfd_zalloc (abfd, amt); 2886 2887 if (!ptr) 2888 return FALSE; 2889 2890 elf_local_ptr_offsets (abfd) = ptr; 2891 } 2892 2893 /* Has this symbol already been allocated? If so, our work is done. */ 2894 if (elf_find_pointer_linker_section (ptr[r_symndx], 2895 rel->r_addend, 2896 lsect)) 2897 return TRUE; 2898 2899 ptr_linker_section_ptr = &ptr[r_symndx]; 2900 } 2901 2902 /* Allocate space for a pointer in the linker section, and allocate 2903 a new pointer record from internal memory. */ 2904 BFD_ASSERT (ptr_linker_section_ptr != NULL); 2905 amt = sizeof (elf_linker_section_pointers_t); 2906 linker_section_ptr = bfd_alloc (abfd, amt); 2907 2908 if (!linker_section_ptr) 2909 return FALSE; 2910 2911 linker_section_ptr->next = *ptr_linker_section_ptr; 2912 linker_section_ptr->addend = rel->r_addend; 2913 linker_section_ptr->lsect = lsect; 2914 *ptr_linker_section_ptr = linker_section_ptr; 2915 2916 linker_section_ptr->offset = lsect->section->size; 2917 lsect->section->size += 4; 2918 2919#ifdef DEBUG 2920 fprintf (stderr, 2921 "Create pointer in linker section %s, offset = %ld, section size = %ld\n", 2922 lsect->name, (long) linker_section_ptr->offset, 2923 (long) lsect->section->size); 2924#endif 2925 2926 return TRUE; 2927} 2928 2929static bfd_boolean 2930update_local_sym_info (bfd *abfd, 2931 Elf_Internal_Shdr *symtab_hdr, 2932 unsigned long r_symndx, 2933 int tls_type) 2934{ 2935 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); 2936 char *local_got_tls_masks; 2937 2938 if (local_got_refcounts == NULL) 2939 { 2940 bfd_size_type size = symtab_hdr->sh_info; 2941 2942 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks); 2943 local_got_refcounts = bfd_zalloc (abfd, size); 2944 if (local_got_refcounts == NULL) 2945 return FALSE; 2946 elf_local_got_refcounts (abfd) = local_got_refcounts; 2947 } 2948 2949 local_got_refcounts[r_symndx] += 1; 2950 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info); 2951 local_got_tls_masks[r_symndx] |= tls_type; 2952 return TRUE; 2953} 2954 2955static bfd_boolean 2956update_plt_info (bfd *abfd, struct elf_link_hash_entry *h, 2957 asection *sec, bfd_vma addend) 2958{ 2959 struct plt_entry *ent; 2960 2961 if (addend < 32768) 2962 sec = NULL; 2963 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 2964 if (ent->sec == sec && ent->addend == addend) 2965 break; 2966 if (ent == NULL) 2967 { 2968 bfd_size_type amt = sizeof (*ent); 2969 ent = bfd_alloc (abfd, amt); 2970 if (ent == NULL) 2971 return FALSE; 2972 ent->next = h->plt.plist; 2973 ent->sec = sec; 2974 ent->addend = addend; 2975 ent->plt.refcount = 0; 2976 h->plt.plist = ent; 2977 } 2978 ent->plt.refcount += 1; 2979 return TRUE; 2980} 2981 2982static struct plt_entry * 2983find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend) 2984{ 2985 struct plt_entry *ent; 2986 2987 if (addend < 32768) 2988 sec = NULL; 2989 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 2990 if (ent->sec == sec && ent->addend == addend) 2991 break; 2992 return ent; 2993} 2994 2995static void 2996bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type) 2997{ 2998 (*_bfd_error_handler) 2999 (_("%B: relocation %s cannot be used when making a shared object"), 3000 abfd, 3001 ppc_elf_howto_table[r_type]->name); 3002 bfd_set_error (bfd_error_bad_value); 3003} 3004 3005/* Look through the relocs for a section during the first phase, and 3006 allocate space in the global offset table or procedure linkage 3007 table. */ 3008 3009static bfd_boolean 3010ppc_elf_check_relocs (bfd *abfd, 3011 struct bfd_link_info *info, 3012 asection *sec, 3013 const Elf_Internal_Rela *relocs) 3014{ 3015 struct ppc_elf_link_hash_table *htab; 3016 Elf_Internal_Shdr *symtab_hdr; 3017 struct elf_link_hash_entry **sym_hashes; 3018 const Elf_Internal_Rela *rel; 3019 const Elf_Internal_Rela *rel_end; 3020 asection *got2, *sreloc; 3021 3022 if (info->relocatable) 3023 return TRUE; 3024 3025 /* Don't do anything special with non-loaded, non-alloced sections. 3026 In particular, any relocs in such sections should not affect GOT 3027 and PLT reference counting (ie. we don't allow them to create GOT 3028 or PLT entries), there's no possibility or desire to optimize TLS 3029 relocs, and there's not much point in propagating relocs to shared 3030 libs that the dynamic linker won't relocate. */ 3031 if ((sec->flags & SEC_ALLOC) == 0) 3032 return TRUE; 3033 3034#ifdef DEBUG 3035 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B", 3036 sec, abfd); 3037#endif 3038 3039 /* Initialize howto table if not already done. */ 3040 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 3041 ppc_elf_howto_init (); 3042 3043 htab = ppc_elf_hash_table (info); 3044 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 3045 sym_hashes = elf_sym_hashes (abfd); 3046 got2 = bfd_get_section_by_name (abfd, ".got2"); 3047 sreloc = NULL; 3048 3049 rel_end = relocs + sec->reloc_count; 3050 for (rel = relocs; rel < rel_end; rel++) 3051 { 3052 unsigned long r_symndx; 3053 enum elf_ppc_reloc_type r_type; 3054 struct elf_link_hash_entry *h; 3055 int tls_type = 0; 3056 3057 r_symndx = ELF32_R_SYM (rel->r_info); 3058 if (r_symndx < symtab_hdr->sh_info) 3059 h = NULL; 3060 else 3061 { 3062 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3063 while (h->root.type == bfd_link_hash_indirect 3064 || h->root.type == bfd_link_hash_warning) 3065 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3066 } 3067 3068 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. 3069 This shows up in particular in an R_PPC_ADDR32 in the eabi 3070 startup code. */ 3071 if (h != NULL 3072 && htab->got == NULL 3073 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 3074 { 3075 if (htab->elf.dynobj == NULL) 3076 htab->elf.dynobj = abfd; 3077 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 3078 return FALSE; 3079 BFD_ASSERT (h == htab->elf.hgot); 3080 } 3081 3082 r_type = ELF32_R_TYPE (rel->r_info); 3083 switch (r_type) 3084 { 3085 case R_PPC_GOT_TLSLD16: 3086 case R_PPC_GOT_TLSLD16_LO: 3087 case R_PPC_GOT_TLSLD16_HI: 3088 case R_PPC_GOT_TLSLD16_HA: 3089 htab->tlsld_got.refcount += 1; 3090 tls_type = TLS_TLS | TLS_LD; 3091 goto dogottls; 3092 3093 case R_PPC_GOT_TLSGD16: 3094 case R_PPC_GOT_TLSGD16_LO: 3095 case R_PPC_GOT_TLSGD16_HI: 3096 case R_PPC_GOT_TLSGD16_HA: 3097 tls_type = TLS_TLS | TLS_GD; 3098 goto dogottls; 3099 3100 case R_PPC_GOT_TPREL16: 3101 case R_PPC_GOT_TPREL16_LO: 3102 case R_PPC_GOT_TPREL16_HI: 3103 case R_PPC_GOT_TPREL16_HA: 3104 if (info->shared) 3105 info->flags |= DF_STATIC_TLS; 3106 tls_type = TLS_TLS | TLS_TPREL; 3107 goto dogottls; 3108 3109 case R_PPC_GOT_DTPREL16: 3110 case R_PPC_GOT_DTPREL16_LO: 3111 case R_PPC_GOT_DTPREL16_HI: 3112 case R_PPC_GOT_DTPREL16_HA: 3113 tls_type = TLS_TLS | TLS_DTPREL; 3114 dogottls: 3115 sec->has_tls_reloc = 1; 3116 /* Fall thru */ 3117 3118 /* GOT16 relocations */ 3119 case R_PPC_GOT16: 3120 case R_PPC_GOT16_LO: 3121 case R_PPC_GOT16_HI: 3122 case R_PPC_GOT16_HA: 3123 /* This symbol requires a global offset table entry. */ 3124 if (htab->got == NULL) 3125 { 3126 if (htab->elf.dynobj == NULL) 3127 htab->elf.dynobj = abfd; 3128 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 3129 return FALSE; 3130 } 3131 if (h != NULL) 3132 { 3133 h->got.refcount += 1; 3134 ppc_elf_hash_entry (h)->tls_mask |= tls_type; 3135 } 3136 else 3137 /* This is a global offset table entry for a local symbol. */ 3138 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)) 3139 return FALSE; 3140 break; 3141 3142 /* Indirect .sdata relocation. */ 3143 case R_PPC_EMB_SDAI16: 3144 if (info->shared) 3145 { 3146 bad_shared_reloc (abfd, r_type); 3147 return FALSE; 3148 } 3149 if (htab->sdata[0].section == NULL 3150 && !ppc_elf_create_linker_section (abfd, info, 0, 3151 &htab->sdata[0])) 3152 return FALSE; 3153 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0], 3154 h, rel)) 3155 return FALSE; 3156 if (h != NULL) 3157 { 3158 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 3159 h->non_got_ref = TRUE; 3160 } 3161 break; 3162 3163 /* Indirect .sdata2 relocation. */ 3164 case R_PPC_EMB_SDA2I16: 3165 if (info->shared) 3166 { 3167 bad_shared_reloc (abfd, r_type); 3168 return FALSE; 3169 } 3170 if (htab->sdata[1].section == NULL 3171 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY, 3172 &htab->sdata[1])) 3173 return FALSE; 3174 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1], 3175 h, rel)) 3176 return FALSE; 3177 if (h != NULL) 3178 { 3179 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 3180 h->non_got_ref = TRUE; 3181 } 3182 break; 3183 3184 case R_PPC_SDAREL16: 3185 if (info->shared) 3186 { 3187 bad_shared_reloc (abfd, r_type); 3188 return FALSE; 3189 } 3190 if (htab->sdata[0].sym == NULL 3191 && !create_sdata_sym (htab, &htab->sdata[0])) 3192 return FALSE; 3193 if (h != NULL) 3194 { 3195 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 3196 h->non_got_ref = TRUE; 3197 } 3198 break; 3199 3200 case R_PPC_EMB_SDA2REL: 3201 if (info->shared) 3202 { 3203 bad_shared_reloc (abfd, r_type); 3204 return FALSE; 3205 } 3206 if (htab->sdata[1].sym == NULL 3207 && !create_sdata_sym (htab, &htab->sdata[1])) 3208 return FALSE; 3209 if (h != NULL) 3210 { 3211 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 3212 h->non_got_ref = TRUE; 3213 } 3214 break; 3215 3216 case R_PPC_EMB_SDA21: 3217 case R_PPC_EMB_RELSDA: 3218 if (info->shared) 3219 { 3220 bad_shared_reloc (abfd, r_type); 3221 return FALSE; 3222 } 3223 if (htab->sdata[0].sym == NULL 3224 && !create_sdata_sym (htab, &htab->sdata[0])) 3225 return FALSE; 3226 if (htab->sdata[1].sym == NULL 3227 && !create_sdata_sym (htab, &htab->sdata[1])) 3228 return FALSE; 3229 if (h != NULL) 3230 { 3231 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 3232 h->non_got_ref = TRUE; 3233 } 3234 break; 3235 3236 case R_PPC_EMB_NADDR32: 3237 case R_PPC_EMB_NADDR16: 3238 case R_PPC_EMB_NADDR16_LO: 3239 case R_PPC_EMB_NADDR16_HI: 3240 case R_PPC_EMB_NADDR16_HA: 3241 if (info->shared) 3242 { 3243 bad_shared_reloc (abfd, r_type); 3244 return FALSE; 3245 } 3246 if (h != NULL) 3247 h->non_got_ref = TRUE; 3248 break; 3249 3250 case R_PPC_PLT32: 3251 case R_PPC_PLTREL24: 3252 case R_PPC_PLTREL32: 3253 case R_PPC_PLT16_LO: 3254 case R_PPC_PLT16_HI: 3255 case R_PPC_PLT16_HA: 3256#ifdef DEBUG 3257 fprintf (stderr, "Reloc requires a PLT entry\n"); 3258#endif 3259 /* This symbol requires a procedure linkage table entry. We 3260 actually build the entry in finish_dynamic_symbol, 3261 because this might be a case of linking PIC code without 3262 linking in any dynamic objects, in which case we don't 3263 need to generate a procedure linkage table after all. */ 3264 3265 if (h == NULL) 3266 { 3267 /* It does not make sense to have a procedure linkage 3268 table entry for a local symbol. */ 3269 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against " 3270 "local symbol"), 3271 abfd, 3272 sec, 3273 (long) rel->r_offset, 3274 ppc_elf_howto_table[r_type]->name); 3275 bfd_set_error (bfd_error_bad_value); 3276 return FALSE; 3277 } 3278 else 3279 { 3280 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0; 3281 3282 h->needs_plt = 1; 3283 if (!update_plt_info (abfd, h, got2, addend)) 3284 return FALSE; 3285 } 3286 break; 3287 3288 /* The following relocations don't need to propagate the 3289 relocation if linking a shared object since they are 3290 section relative. */ 3291 case R_PPC_SECTOFF: 3292 case R_PPC_SECTOFF_LO: 3293 case R_PPC_SECTOFF_HI: 3294 case R_PPC_SECTOFF_HA: 3295 case R_PPC_DTPREL16: 3296 case R_PPC_DTPREL16_LO: 3297 case R_PPC_DTPREL16_HI: 3298 case R_PPC_DTPREL16_HA: 3299 case R_PPC_TOC16: 3300 break; 3301 3302 case R_PPC_REL16: 3303 case R_PPC_REL16_LO: 3304 case R_PPC_REL16_HI: 3305 case R_PPC_REL16_HA: 3306 htab->can_use_new_plt = 1; 3307 break; 3308 3309 /* These are just markers. */ 3310 case R_PPC_TLS: 3311 case R_PPC_EMB_MRKREF: 3312 case R_PPC_NONE: 3313 case R_PPC_max: 3314 break; 3315 3316 /* These should only appear in dynamic objects. */ 3317 case R_PPC_COPY: 3318 case R_PPC_GLOB_DAT: 3319 case R_PPC_JMP_SLOT: 3320 case R_PPC_RELATIVE: 3321 break; 3322 3323 /* These aren't handled yet. We'll report an error later. */ 3324 case R_PPC_ADDR30: 3325 case R_PPC_EMB_RELSEC16: 3326 case R_PPC_EMB_RELST_LO: 3327 case R_PPC_EMB_RELST_HI: 3328 case R_PPC_EMB_RELST_HA: 3329 case R_PPC_EMB_BIT_FLD: 3330 break; 3331 3332 /* This refers only to functions defined in the shared library. */ 3333 case R_PPC_LOCAL24PC: 3334 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET) 3335 htab->plt_type = PLT_OLD; 3336 break; 3337 3338 /* This relocation describes the C++ object vtable hierarchy. 3339 Reconstruct it for later use during GC. */ 3340 case R_PPC_GNU_VTINHERIT: 3341 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 3342 return FALSE; 3343 break; 3344 3345 /* This relocation describes which C++ vtable entries are actually 3346 used. Record for later use during GC. */ 3347 case R_PPC_GNU_VTENTRY: 3348 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 3349 return FALSE; 3350 break; 3351 3352 /* We shouldn't really be seeing these. */ 3353 case R_PPC_TPREL32: 3354 if (info->shared) 3355 info->flags |= DF_STATIC_TLS; 3356 goto dodyn; 3357 3358 /* Nor these. */ 3359 case R_PPC_DTPMOD32: 3360 case R_PPC_DTPREL32: 3361 goto dodyn; 3362 3363 case R_PPC_TPREL16: 3364 case R_PPC_TPREL16_LO: 3365 case R_PPC_TPREL16_HI: 3366 case R_PPC_TPREL16_HA: 3367 if (info->shared) 3368 info->flags |= DF_STATIC_TLS; 3369 goto dodyn; 3370 3371 case R_PPC_REL32: 3372 if (h == NULL 3373 && got2 != NULL 3374 && (sec->flags & SEC_CODE) != 0 3375 && (info->shared || info->pie) 3376 && htab->plt_type == PLT_UNSET) 3377 { 3378 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before 3379 the start of a function, which assembles to a REL32 3380 reference to .got2. If we detect one of these, then 3381 force the old PLT layout because the linker cannot 3382 reliably deduce the GOT pointer value needed for 3383 PLT call stubs. */ 3384 asection *s; 3385 3386 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec, 3387 r_symndx); 3388 if (s == got2) 3389 htab->plt_type = PLT_OLD; 3390 } 3391 if (h == NULL || h == htab->elf.hgot) 3392 break; 3393 goto dodyn1; 3394 3395 case R_PPC_REL24: 3396 case R_PPC_REL14: 3397 case R_PPC_REL14_BRTAKEN: 3398 case R_PPC_REL14_BRNTAKEN: 3399 if (h == NULL) 3400 break; 3401 if (h == htab->elf.hgot) 3402 { 3403 if (htab->plt_type == PLT_UNSET) 3404 htab->plt_type = PLT_OLD; 3405 break; 3406 } 3407 /* fall through */ 3408 3409 case R_PPC_ADDR32: 3410 case R_PPC_ADDR24: 3411 case R_PPC_ADDR16: 3412 case R_PPC_ADDR16_LO: 3413 case R_PPC_ADDR16_HI: 3414 case R_PPC_ADDR16_HA: 3415 case R_PPC_ADDR14: 3416 case R_PPC_ADDR14_BRTAKEN: 3417 case R_PPC_ADDR14_BRNTAKEN: 3418 case R_PPC_UADDR32: 3419 case R_PPC_UADDR16: 3420 dodyn1: 3421 if (h != NULL && !info->shared) 3422 { 3423 /* We may need a plt entry if the symbol turns out to be 3424 a function defined in a dynamic object. */ 3425 if (!update_plt_info (abfd, h, NULL, 0)) 3426 return FALSE; 3427 3428 /* We may need a copy reloc too. */ 3429 h->non_got_ref = 1; 3430 } 3431 3432 dodyn: 3433 /* If we are creating a shared library, and this is a reloc 3434 against a global symbol, or a non PC relative reloc 3435 against a local symbol, then we need to copy the reloc 3436 into the shared library. However, if we are linking with 3437 -Bsymbolic, we do not need to copy a reloc against a 3438 global symbol which is defined in an object we are 3439 including in the link (i.e., DEF_REGULAR is set). At 3440 this point we have not seen all the input files, so it is 3441 possible that DEF_REGULAR is not set now but will be set 3442 later (it is never cleared). In case of a weak definition, 3443 DEF_REGULAR may be cleared later by a strong definition in 3444 a shared library. We account for that possibility below by 3445 storing information in the dyn_relocs field of the hash 3446 table entry. A similar situation occurs when creating 3447 shared libraries and symbol visibility changes render the 3448 symbol local. 3449 3450 If on the other hand, we are creating an executable, we 3451 may need to keep relocations for symbols satisfied by a 3452 dynamic library if we manage to avoid copy relocs for the 3453 symbol. */ 3454 if ((info->shared 3455 && (MUST_BE_DYN_RELOC (r_type) 3456 || (h != NULL 3457 && (! info->symbolic 3458 || h->root.type == bfd_link_hash_defweak 3459 || !h->def_regular)))) 3460 || (ELIMINATE_COPY_RELOCS 3461 && !info->shared 3462 && h != NULL 3463 && (h->root.type == bfd_link_hash_defweak 3464 || !h->def_regular))) 3465 { 3466 struct ppc_elf_dyn_relocs *p; 3467 struct ppc_elf_dyn_relocs **head; 3468 3469#ifdef DEBUG 3470 fprintf (stderr, 3471 "ppc_elf_check_relocs needs to " 3472 "create relocation for %s\n", 3473 (h && h->root.root.string 3474 ? h->root.root.string : "<unknown>")); 3475#endif 3476 if (sreloc == NULL) 3477 { 3478 const char *name; 3479 3480 name = (bfd_elf_string_from_elf_section 3481 (abfd, 3482 elf_elfheader (abfd)->e_shstrndx, 3483 elf_section_data (sec)->rel_hdr.sh_name)); 3484 if (name == NULL) 3485 return FALSE; 3486 3487 BFD_ASSERT (CONST_STRNEQ (name, ".rela") 3488 && strcmp (bfd_get_section_name (abfd, sec), 3489 name + 5) == 0); 3490 3491 if (htab->elf.dynobj == NULL) 3492 htab->elf.dynobj = abfd; 3493 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name); 3494 if (sreloc == NULL) 3495 { 3496 flagword flags; 3497 3498 flags = (SEC_HAS_CONTENTS | SEC_READONLY 3499 | SEC_IN_MEMORY | SEC_LINKER_CREATED 3500 | SEC_ALLOC | SEC_LOAD); 3501 sreloc = bfd_make_section_with_flags (htab->elf.dynobj, 3502 name, 3503 flags); 3504 if (sreloc == NULL 3505 || ! bfd_set_section_alignment (htab->elf.dynobj, 3506 sreloc, 2)) 3507 return FALSE; 3508 } 3509 elf_section_data (sec)->sreloc = sreloc; 3510 } 3511 3512 /* If this is a global symbol, we count the number of 3513 relocations we need for this symbol. */ 3514 if (h != NULL) 3515 { 3516 head = &ppc_elf_hash_entry (h)->dyn_relocs; 3517 } 3518 else 3519 { 3520 /* Track dynamic relocs needed for local syms too. 3521 We really need local syms available to do this 3522 easily. Oh well. */ 3523 3524 asection *s; 3525 void *vpp; 3526 3527 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, 3528 sec, r_symndx); 3529 if (s == NULL) 3530 return FALSE; 3531 3532 vpp = &elf_section_data (s)->local_dynrel; 3533 head = (struct ppc_elf_dyn_relocs **) vpp; 3534 } 3535 3536 p = *head; 3537 if (p == NULL || p->sec != sec) 3538 { 3539 p = bfd_alloc (htab->elf.dynobj, sizeof *p); 3540 if (p == NULL) 3541 return FALSE; 3542 p->next = *head; 3543 *head = p; 3544 p->sec = sec; 3545 p->count = 0; 3546 p->pc_count = 0; 3547 } 3548 3549 p->count += 1; 3550 if (!MUST_BE_DYN_RELOC (r_type)) 3551 p->pc_count += 1; 3552 } 3553 3554 break; 3555 } 3556 } 3557 3558 return TRUE; 3559} 3560 3561/* Merge backend specific data from an object file to the output 3562 object file when linking. */ 3563 3564static bfd_boolean 3565ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 3566{ 3567 flagword old_flags; 3568 flagword new_flags; 3569 bfd_boolean error; 3570 3571 if (!is_ppc_elf_target (ibfd->xvec) 3572 || !is_ppc_elf_target (obfd->xvec)) 3573 return TRUE; 3574 3575 /* Check if we have the same endianess. */ 3576 if (! _bfd_generic_verify_endian_match (ibfd, obfd)) 3577 return FALSE; 3578 3579 new_flags = elf_elfheader (ibfd)->e_flags; 3580 old_flags = elf_elfheader (obfd)->e_flags; 3581 if (!elf_flags_init (obfd)) 3582 { 3583 /* First call, no flags set. */ 3584 elf_flags_init (obfd) = TRUE; 3585 elf_elfheader (obfd)->e_flags = new_flags; 3586 } 3587 3588 /* Compatible flags are ok. */ 3589 else if (new_flags == old_flags) 3590 ; 3591 3592 /* Incompatible flags. */ 3593 else 3594 { 3595 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib 3596 to be linked with either. */ 3597 error = FALSE; 3598 if ((new_flags & EF_PPC_RELOCATABLE) != 0 3599 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) 3600 { 3601 error = TRUE; 3602 (*_bfd_error_handler) 3603 (_("%B: compiled with -mrelocatable and linked with " 3604 "modules compiled normally"), ibfd); 3605 } 3606 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 3607 && (old_flags & EF_PPC_RELOCATABLE) != 0) 3608 { 3609 error = TRUE; 3610 (*_bfd_error_handler) 3611 (_("%B: compiled normally and linked with " 3612 "modules compiled with -mrelocatable"), ibfd); 3613 } 3614 3615 /* The output is -mrelocatable-lib iff both the input files are. */ 3616 if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) 3617 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; 3618 3619 /* The output is -mrelocatable iff it can't be -mrelocatable-lib, 3620 but each input file is either -mrelocatable or -mrelocatable-lib. */ 3621 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) 3622 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) 3623 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) 3624 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; 3625 3626 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if 3627 any module uses it. */ 3628 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); 3629 3630 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 3631 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 3632 3633 /* Warn about any other mismatches. */ 3634 if (new_flags != old_flags) 3635 { 3636 error = TRUE; 3637 (*_bfd_error_handler) 3638 (_("%B: uses different e_flags (0x%lx) fields " 3639 "than previous modules (0x%lx)"), 3640 ibfd, (long) new_flags, (long) old_flags); 3641 } 3642 3643 if (error) 3644 { 3645 bfd_set_error (bfd_error_bad_value); 3646 return FALSE; 3647 } 3648 } 3649 3650 return TRUE; 3651} 3652 3653/* Choose which PLT scheme to use, and set .plt flags appropriately. 3654 Returns -1 on error, 0 for old PLT, 1 for new PLT. */ 3655int 3656ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED, 3657 struct bfd_link_info *info, 3658 int force_old_plt, 3659 int emit_stub_syms) 3660{ 3661 struct ppc_elf_link_hash_table *htab; 3662 flagword flags; 3663 3664 htab = ppc_elf_hash_table (info); 3665 3666 if (htab->plt_type == PLT_UNSET) 3667 htab->plt_type = (force_old_plt || !htab->can_use_new_plt 3668 ? PLT_OLD : PLT_NEW); 3669 3670 htab->emit_stub_syms = emit_stub_syms; 3671 3672 BFD_ASSERT (htab->plt_type != PLT_VXWORKS); 3673 3674 if (htab->plt_type == PLT_NEW) 3675 { 3676 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 3677 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3678 3679 /* The new PLT is a loaded section. */ 3680 if (htab->plt != NULL 3681 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags)) 3682 return -1; 3683 3684 /* The new GOT is not executable. */ 3685 if (htab->got != NULL 3686 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags)) 3687 return -1; 3688 } 3689 else 3690 { 3691 /* Stop an unused .glink section from affecting .text alignment. */ 3692 if (htab->glink != NULL 3693 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0)) 3694 return -1; 3695 } 3696 return htab->plt_type == PLT_NEW; 3697} 3698 3699/* Return the section that should be marked against GC for a given 3700 relocation. */ 3701 3702static asection * 3703ppc_elf_gc_mark_hook (asection *sec, 3704 struct bfd_link_info *info, 3705 Elf_Internal_Rela *rel, 3706 struct elf_link_hash_entry *h, 3707 Elf_Internal_Sym *sym) 3708{ 3709 if (h != NULL) 3710 switch (ELF32_R_TYPE (rel->r_info)) 3711 { 3712 case R_PPC_GNU_VTINHERIT: 3713 case R_PPC_GNU_VTENTRY: 3714 return NULL; 3715 } 3716 3717 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 3718} 3719 3720/* Update the got, plt and dynamic reloc reference counts for the 3721 section being removed. */ 3722 3723static bfd_boolean 3724ppc_elf_gc_sweep_hook (bfd *abfd, 3725 struct bfd_link_info *info, 3726 asection *sec, 3727 const Elf_Internal_Rela *relocs) 3728{ 3729 struct ppc_elf_link_hash_table *htab; 3730 Elf_Internal_Shdr *symtab_hdr; 3731 struct elf_link_hash_entry **sym_hashes; 3732 bfd_signed_vma *local_got_refcounts; 3733 const Elf_Internal_Rela *rel, *relend; 3734 asection *got2; 3735 3736 if ((sec->flags & SEC_ALLOC) == 0) 3737 return TRUE; 3738 3739 elf_section_data (sec)->local_dynrel = NULL; 3740 3741 htab = ppc_elf_hash_table (info); 3742 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 3743 sym_hashes = elf_sym_hashes (abfd); 3744 local_got_refcounts = elf_local_got_refcounts (abfd); 3745 got2 = bfd_get_section_by_name (abfd, ".got2"); 3746 3747 relend = relocs + sec->reloc_count; 3748 for (rel = relocs; rel < relend; rel++) 3749 { 3750 unsigned long r_symndx; 3751 enum elf_ppc_reloc_type r_type; 3752 struct elf_link_hash_entry *h = NULL; 3753 3754 r_symndx = ELF32_R_SYM (rel->r_info); 3755 if (r_symndx >= symtab_hdr->sh_info) 3756 { 3757 struct ppc_elf_dyn_relocs **pp, *p; 3758 struct ppc_elf_link_hash_entry *eh; 3759 3760 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3761 while (h->root.type == bfd_link_hash_indirect 3762 || h->root.type == bfd_link_hash_warning) 3763 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3764 eh = (struct ppc_elf_link_hash_entry *) h; 3765 3766 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 3767 if (p->sec == sec) 3768 { 3769 /* Everything must go for SEC. */ 3770 *pp = p->next; 3771 break; 3772 } 3773 } 3774 3775 r_type = ELF32_R_TYPE (rel->r_info); 3776 switch (r_type) 3777 { 3778 case R_PPC_GOT_TLSLD16: 3779 case R_PPC_GOT_TLSLD16_LO: 3780 case R_PPC_GOT_TLSLD16_HI: 3781 case R_PPC_GOT_TLSLD16_HA: 3782 htab->tlsld_got.refcount -= 1; 3783 /* Fall thru */ 3784 3785 case R_PPC_GOT_TLSGD16: 3786 case R_PPC_GOT_TLSGD16_LO: 3787 case R_PPC_GOT_TLSGD16_HI: 3788 case R_PPC_GOT_TLSGD16_HA: 3789 case R_PPC_GOT_TPREL16: 3790 case R_PPC_GOT_TPREL16_LO: 3791 case R_PPC_GOT_TPREL16_HI: 3792 case R_PPC_GOT_TPREL16_HA: 3793 case R_PPC_GOT_DTPREL16: 3794 case R_PPC_GOT_DTPREL16_LO: 3795 case R_PPC_GOT_DTPREL16_HI: 3796 case R_PPC_GOT_DTPREL16_HA: 3797 case R_PPC_GOT16: 3798 case R_PPC_GOT16_LO: 3799 case R_PPC_GOT16_HI: 3800 case R_PPC_GOT16_HA: 3801 if (h != NULL) 3802 { 3803 if (h->got.refcount > 0) 3804 h->got.refcount--; 3805 } 3806 else if (local_got_refcounts != NULL) 3807 { 3808 if (local_got_refcounts[r_symndx] > 0) 3809 local_got_refcounts[r_symndx]--; 3810 } 3811 break; 3812 3813 case R_PPC_REL24: 3814 case R_PPC_REL14: 3815 case R_PPC_REL14_BRTAKEN: 3816 case R_PPC_REL14_BRNTAKEN: 3817 case R_PPC_REL32: 3818 if (h == NULL || h == htab->elf.hgot) 3819 break; 3820 /* Fall thru */ 3821 3822 case R_PPC_ADDR32: 3823 case R_PPC_ADDR24: 3824 case R_PPC_ADDR16: 3825 case R_PPC_ADDR16_LO: 3826 case R_PPC_ADDR16_HI: 3827 case R_PPC_ADDR16_HA: 3828 case R_PPC_ADDR14: 3829 case R_PPC_ADDR14_BRTAKEN: 3830 case R_PPC_ADDR14_BRNTAKEN: 3831 case R_PPC_UADDR32: 3832 case R_PPC_UADDR16: 3833 if (info->shared) 3834 break; 3835 3836 case R_PPC_PLT32: 3837 case R_PPC_PLTREL24: 3838 case R_PPC_PLTREL32: 3839 case R_PPC_PLT16_LO: 3840 case R_PPC_PLT16_HI: 3841 case R_PPC_PLT16_HA: 3842 if (h != NULL) 3843 { 3844 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0; 3845 struct plt_entry *ent = find_plt_ent (h, got2, addend); 3846 if (ent->plt.refcount > 0) 3847 ent->plt.refcount -= 1; 3848 } 3849 break; 3850 3851 default: 3852 break; 3853 } 3854 } 3855 return TRUE; 3856} 3857 3858/* Set htab->tls_get_addr and call the generic ELF tls_setup function. */ 3859 3860asection * 3861ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) 3862{ 3863 struct ppc_elf_link_hash_table *htab; 3864 3865 htab = ppc_elf_hash_table (info); 3866 if (htab->plt_type == PLT_NEW 3867 && htab->plt != NULL 3868 && htab->plt->output_section != NULL) 3869 { 3870 elf_section_type (htab->plt->output_section) = SHT_PROGBITS; 3871 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE; 3872 } 3873 3874 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", 3875 FALSE, FALSE, TRUE); 3876 return _bfd_elf_tls_setup (obfd, info); 3877} 3878 3879/* Run through all the TLS relocs looking for optimization 3880 opportunities. */ 3881 3882bfd_boolean 3883ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, 3884 struct bfd_link_info *info) 3885{ 3886 bfd *ibfd; 3887 asection *sec; 3888 struct ppc_elf_link_hash_table *htab; 3889 3890 if (info->relocatable || info->shared) 3891 return TRUE; 3892 3893 htab = ppc_elf_hash_table (info); 3894 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 3895 { 3896 Elf_Internal_Sym *locsyms = NULL; 3897 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 3898 3899 for (sec = ibfd->sections; sec != NULL; sec = sec->next) 3900 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) 3901 { 3902 Elf_Internal_Rela *relstart, *rel, *relend; 3903 int expecting_tls_get_addr; 3904 3905 /* Read the relocations. */ 3906 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, 3907 info->keep_memory); 3908 if (relstart == NULL) 3909 return FALSE; 3910 3911 expecting_tls_get_addr = 0; 3912 relend = relstart + sec->reloc_count; 3913 for (rel = relstart; rel < relend; rel++) 3914 { 3915 enum elf_ppc_reloc_type r_type; 3916 unsigned long r_symndx; 3917 struct elf_link_hash_entry *h = NULL; 3918 char *tls_mask; 3919 char tls_set, tls_clear; 3920 bfd_boolean is_local; 3921 3922 r_symndx = ELF32_R_SYM (rel->r_info); 3923 if (r_symndx >= symtab_hdr->sh_info) 3924 { 3925 struct elf_link_hash_entry **sym_hashes; 3926 3927 sym_hashes = elf_sym_hashes (ibfd); 3928 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3929 while (h->root.type == bfd_link_hash_indirect 3930 || h->root.type == bfd_link_hash_warning) 3931 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3932 } 3933 3934 is_local = FALSE; 3935 if (h == NULL 3936 || !h->def_dynamic) 3937 is_local = TRUE; 3938 3939 r_type = ELF32_R_TYPE (rel->r_info); 3940 switch (r_type) 3941 { 3942 case R_PPC_GOT_TLSLD16: 3943 case R_PPC_GOT_TLSLD16_LO: 3944 case R_PPC_GOT_TLSLD16_HI: 3945 case R_PPC_GOT_TLSLD16_HA: 3946 /* These relocs should never be against a symbol 3947 defined in a shared lib. Leave them alone if 3948 that turns out to be the case. */ 3949 expecting_tls_get_addr = 0; 3950 htab->tlsld_got.refcount -= 1; 3951 if (!is_local) 3952 continue; 3953 3954 /* LD -> LE */ 3955 tls_set = 0; 3956 tls_clear = TLS_LD; 3957 expecting_tls_get_addr = 1; 3958 break; 3959 3960 case R_PPC_GOT_TLSGD16: 3961 case R_PPC_GOT_TLSGD16_LO: 3962 case R_PPC_GOT_TLSGD16_HI: 3963 case R_PPC_GOT_TLSGD16_HA: 3964 if (is_local) 3965 /* GD -> LE */ 3966 tls_set = 0; 3967 else 3968 /* GD -> IE */ 3969 tls_set = TLS_TLS | TLS_TPRELGD; 3970 tls_clear = TLS_GD; 3971 expecting_tls_get_addr = 1; 3972 break; 3973 3974 case R_PPC_GOT_TPREL16: 3975 case R_PPC_GOT_TPREL16_LO: 3976 case R_PPC_GOT_TPREL16_HI: 3977 case R_PPC_GOT_TPREL16_HA: 3978 expecting_tls_get_addr = 0; 3979 if (is_local) 3980 { 3981 /* IE -> LE */ 3982 tls_set = 0; 3983 tls_clear = TLS_TPREL; 3984 break; 3985 } 3986 else 3987 continue; 3988 3989 case R_PPC_REL14: 3990 case R_PPC_REL14_BRTAKEN: 3991 case R_PPC_REL14_BRNTAKEN: 3992 case R_PPC_REL24: 3993 if (expecting_tls_get_addr 3994 && h != NULL 3995 && h == htab->tls_get_addr) 3996 { 3997 struct plt_entry *ent = find_plt_ent (h, NULL, 0); 3998 if (ent != NULL && ent->plt.refcount > 0) 3999 ent->plt.refcount -= 1; 4000 } 4001 expecting_tls_get_addr = 0; 4002 continue; 4003 4004 default: 4005 expecting_tls_get_addr = 0; 4006 continue; 4007 } 4008 4009 if (h != NULL) 4010 { 4011 if (tls_set == 0) 4012 { 4013 /* We managed to get rid of a got entry. */ 4014 if (h->got.refcount > 0) 4015 h->got.refcount -= 1; 4016 } 4017 tls_mask = &ppc_elf_hash_entry (h)->tls_mask; 4018 } 4019 else 4020 { 4021 Elf_Internal_Sym *sym; 4022 bfd_signed_vma *lgot_refs; 4023 char *lgot_masks; 4024 4025 if (locsyms == NULL) 4026 { 4027 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; 4028 if (locsyms == NULL) 4029 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, 4030 symtab_hdr->sh_info, 4031 0, NULL, NULL, NULL); 4032 if (locsyms == NULL) 4033 { 4034 if (elf_section_data (sec)->relocs != relstart) 4035 free (relstart); 4036 return FALSE; 4037 } 4038 } 4039 sym = locsyms + r_symndx; 4040 lgot_refs = elf_local_got_refcounts (ibfd); 4041 if (lgot_refs == NULL) 4042 abort (); 4043 if (tls_set == 0) 4044 { 4045 /* We managed to get rid of a got entry. */ 4046 if (lgot_refs[r_symndx] > 0) 4047 lgot_refs[r_symndx] -= 1; 4048 } 4049 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info); 4050 tls_mask = &lgot_masks[r_symndx]; 4051 } 4052 4053 *tls_mask |= tls_set; 4054 *tls_mask &= ~tls_clear; 4055 } 4056 4057 if (elf_section_data (sec)->relocs != relstart) 4058 free (relstart); 4059 } 4060 4061 if (locsyms != NULL 4062 && (symtab_hdr->contents != (unsigned char *) locsyms)) 4063 { 4064 if (!info->keep_memory) 4065 free (locsyms); 4066 else 4067 symtab_hdr->contents = (unsigned char *) locsyms; 4068 } 4069 } 4070 return TRUE; 4071} 4072 4073/* Adjust a symbol defined by a dynamic object and referenced by a 4074 regular object. The current definition is in some section of the 4075 dynamic object, but we're not including those sections. We have to 4076 change the definition to something the rest of the link can 4077 understand. */ 4078 4079static bfd_boolean 4080ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 4081 struct elf_link_hash_entry *h) 4082{ 4083 struct ppc_elf_link_hash_table *htab; 4084 asection *s; 4085 unsigned int power_of_two; 4086 4087#ifdef DEBUG 4088 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", 4089 h->root.root.string); 4090#endif 4091 4092 /* Make sure we know what is going on here. */ 4093 htab = ppc_elf_hash_table (info); 4094 BFD_ASSERT (htab->elf.dynobj != NULL 4095 && (h->needs_plt 4096 || h->u.weakdef != NULL 4097 || (h->def_dynamic 4098 && h->ref_regular 4099 && !h->def_regular))); 4100 4101 /* Deal with function syms. */ 4102 if (h->type == STT_FUNC 4103 || h->needs_plt) 4104 { 4105 /* Clear procedure linkage table information for any symbol that 4106 won't need a .plt entry. */ 4107 struct plt_entry *ent; 4108 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 4109 if (ent->plt.refcount > 0) 4110 break; 4111 if (ent == NULL 4112 || SYMBOL_CALLS_LOCAL (info, h) 4113 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 4114 && h->root.type == bfd_link_hash_undefweak)) 4115 { 4116 /* A PLT entry is not required/allowed when: 4117 4118 1. We are not using ld.so; because then the PLT entry 4119 can't be set up, so we can't use one. In this case, 4120 ppc_elf_adjust_dynamic_symbol won't even be called. 4121 4122 2. GC has rendered the entry unused. 4123 4124 3. We know for certain that a call to this symbol 4125 will go to this object, or will remain undefined. */ 4126 h->plt.plist = NULL; 4127 h->needs_plt = 0; 4128 } 4129 return TRUE; 4130 } 4131 else 4132 h->plt.plist = NULL; 4133 4134 /* If this is a weak symbol, and there is a real definition, the 4135 processor independent code will have arranged for us to see the 4136 real definition first, and we can just use the same value. */ 4137 if (h->u.weakdef != NULL) 4138 { 4139 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 4140 || h->u.weakdef->root.type == bfd_link_hash_defweak); 4141 h->root.u.def.section = h->u.weakdef->root.u.def.section; 4142 h->root.u.def.value = h->u.weakdef->root.u.def.value; 4143 if (ELIMINATE_COPY_RELOCS) 4144 h->non_got_ref = h->u.weakdef->non_got_ref; 4145 return TRUE; 4146 } 4147 4148 /* This is a reference to a symbol defined by a dynamic object which 4149 is not a function. */ 4150 4151 /* If we are creating a shared library, we must presume that the 4152 only references to the symbol are via the global offset table. 4153 For such cases we need not do anything here; the relocations will 4154 be handled correctly by relocate_section. */ 4155 if (info->shared) 4156 return TRUE; 4157 4158 /* If there are no references to this symbol that do not use the 4159 GOT, we don't need to generate a copy reloc. */ 4160 if (!h->non_got_ref) 4161 return TRUE; 4162 4163 /* If we didn't find any dynamic relocs in read-only sections, then we'll 4164 be keeping the dynamic relocs and avoiding the copy reloc. We can't 4165 do this if there are any small data relocations. */ 4166 if (ELIMINATE_COPY_RELOCS 4167 && !ppc_elf_hash_entry (h)->has_sda_refs) 4168 { 4169 struct ppc_elf_dyn_relocs *p; 4170 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) 4171 { 4172 s = p->sec->output_section; 4173 if (s != NULL && (s->flags & SEC_READONLY) != 0) 4174 break; 4175 } 4176 4177 if (p == NULL) 4178 { 4179 h->non_got_ref = 0; 4180 return TRUE; 4181 } 4182 } 4183 4184 if (h->size == 0) 4185 { 4186 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), 4187 h->root.root.string); 4188 return TRUE; 4189 } 4190 4191 /* We must allocate the symbol in our .dynbss section, which will 4192 become part of the .bss section of the executable. There will be 4193 an entry for this symbol in the .dynsym section. The dynamic 4194 object will contain position independent code, so all references 4195 from the dynamic object to this symbol will go through the global 4196 offset table. The dynamic linker will use the .dynsym entry to 4197 determine the address it must put in the global offset table, so 4198 both the dynamic object and the regular object will refer to the 4199 same memory location for the variable. 4200 4201 Of course, if the symbol is referenced using SDAREL relocs, we 4202 must instead allocate it in .sbss. */ 4203 4204 if (ppc_elf_hash_entry (h)->has_sda_refs) 4205 s = htab->dynsbss; 4206 else 4207 s = htab->dynbss; 4208 BFD_ASSERT (s != NULL); 4209 4210 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to 4211 copy the initial value out of the dynamic object and into the 4212 runtime process image. We need to remember the offset into the 4213 .rela.bss section we are going to use. */ 4214 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) 4215 { 4216 asection *srel; 4217 4218 if (ppc_elf_hash_entry (h)->has_sda_refs) 4219 srel = htab->relsbss; 4220 else 4221 srel = htab->relbss; 4222 BFD_ASSERT (srel != NULL); 4223 srel->size += sizeof (Elf32_External_Rela); 4224 h->needs_copy = 1; 4225 } 4226 4227 /* We need to figure out the alignment required for this symbol. I 4228 have no idea how ELF linkers handle this. */ 4229 power_of_two = bfd_log2 (h->size); 4230 if (power_of_two > 4) 4231 power_of_two = 4; 4232 4233 /* Apply the required alignment. */ 4234 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); 4235 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) 4236 { 4237 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) 4238 return FALSE; 4239 } 4240 4241 /* Define the symbol as being at this point in the section. */ 4242 h->root.u.def.section = s; 4243 h->root.u.def.value = s->size; 4244 4245 /* Increment the section size to make room for the symbol. */ 4246 s->size += h->size; 4247 4248 return TRUE; 4249} 4250 4251/* Generate a symbol to mark plt call stubs. For non-PIC code the sym is 4252 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0, 4253 specifying the addend on the plt relocation. For -fpic code, the sym 4254 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC 4255 xxxxxxxx.got2.plt_pic32.<callee>. */ 4256 4257static bfd_boolean 4258add_stub_sym (struct plt_entry *ent, 4259 struct elf_link_hash_entry *h, 4260 struct bfd_link_info *info) 4261{ 4262 struct elf_link_hash_entry *sh; 4263 size_t len1, len2, len3; 4264 char *name; 4265 const char *stub; 4266 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 4267 4268 if (info->shared || info->pie) 4269 stub = ".plt_pic32."; 4270 else 4271 stub = ".plt_call32."; 4272 4273 len1 = strlen (h->root.root.string); 4274 len2 = strlen (stub); 4275 len3 = 0; 4276 if (ent->sec) 4277 len3 = strlen (ent->sec->name); 4278 name = bfd_malloc (len1 + len2 + len3 + 9); 4279 if (name == NULL) 4280 return FALSE; 4281 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff); 4282 if (ent->sec) 4283 memcpy (name + 8, ent->sec->name, len3); 4284 memcpy (name + 8 + len3, stub, len2); 4285 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1); 4286 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); 4287 if (sh == NULL) 4288 return FALSE; 4289 if (sh->root.type == bfd_link_hash_new) 4290 { 4291 sh->root.type = bfd_link_hash_defined; 4292 sh->root.u.def.section = htab->glink; 4293 sh->root.u.def.value = ent->glink_offset; 4294 sh->ref_regular = 1; 4295 sh->def_regular = 1; 4296 sh->ref_regular_nonweak = 1; 4297 sh->forced_local = 1; 4298 sh->non_elf = 0; 4299 } 4300 return TRUE; 4301} 4302 4303/* Allocate NEED contiguous space in .got, and return the offset. 4304 Handles allocation of the got header when crossing 32k. */ 4305 4306static bfd_vma 4307allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need) 4308{ 4309 bfd_vma where; 4310 unsigned int max_before_header; 4311 4312 if (htab->plt_type == PLT_VXWORKS) 4313 { 4314 where = htab->got->size; 4315 htab->got->size += need; 4316 } 4317 else 4318 { 4319 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764; 4320 if (need <= htab->got_gap) 4321 { 4322 where = max_before_header - htab->got_gap; 4323 htab->got_gap -= need; 4324 } 4325 else 4326 { 4327 if (htab->got->size + need > max_before_header 4328 && htab->got->size <= max_before_header) 4329 { 4330 htab->got_gap = max_before_header - htab->got->size; 4331 htab->got->size = max_before_header + htab->got_header_size; 4332 } 4333 where = htab->got->size; 4334 htab->got->size += need; 4335 } 4336 } 4337 return where; 4338} 4339 4340/* Allocate space in associated reloc sections for dynamic relocs. */ 4341 4342static bfd_boolean 4343allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) 4344{ 4345 struct bfd_link_info *info = inf; 4346 struct ppc_elf_link_hash_entry *eh; 4347 struct ppc_elf_link_hash_table *htab; 4348 struct ppc_elf_dyn_relocs *p; 4349 4350 if (h->root.type == bfd_link_hash_indirect) 4351 return TRUE; 4352 4353 if (h->root.type == bfd_link_hash_warning) 4354 /* When warning symbols are created, they **replace** the "real" 4355 entry in the hash table, thus we never get to see the real 4356 symbol in a hash traversal. So look at it now. */ 4357 h = (struct elf_link_hash_entry *) h->root.u.i.link; 4358 4359 htab = ppc_elf_hash_table (info); 4360 if (htab->elf.dynamic_sections_created) 4361 { 4362 struct plt_entry *ent; 4363 bfd_boolean doneone = FALSE; 4364 bfd_vma plt_offset = 0, glink_offset = 0; 4365 4366 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 4367 if (ent->plt.refcount > 0) 4368 { 4369 /* Make sure this symbol is output as a dynamic symbol. */ 4370 if (h->dynindx == -1 4371 && !h->forced_local) 4372 { 4373 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 4374 return FALSE; 4375 } 4376 4377 if (info->shared 4378 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) 4379 { 4380 asection *s = htab->plt; 4381 4382 if (htab->plt_type == PLT_NEW) 4383 { 4384 if (!doneone) 4385 { 4386 plt_offset = s->size; 4387 s->size += 4; 4388 } 4389 ent->plt.offset = plt_offset; 4390 4391 s = htab->glink; 4392 if (!doneone || info->shared || info->pie) 4393 { 4394 glink_offset = s->size; 4395 s->size += GLINK_ENTRY_SIZE; 4396 } 4397 if (!doneone 4398 && !info->shared 4399 && !h->def_regular) 4400 { 4401 h->root.u.def.section = s; 4402 h->root.u.def.value = glink_offset; 4403 } 4404 ent->glink_offset = glink_offset; 4405 4406 if (htab->emit_stub_syms 4407 && !add_stub_sym (ent, h, info)) 4408 return FALSE; 4409 } 4410 else 4411 { 4412 if (!doneone) 4413 { 4414 /* If this is the first .plt entry, make room 4415 for the special first entry. */ 4416 if (s->size == 0) 4417 s->size += htab->plt_initial_entry_size; 4418 4419 /* The PowerPC PLT is actually composed of two 4420 parts, the first part is 2 words (for a load 4421 and a jump), and then there is a remaining 4422 word available at the end. */ 4423 plt_offset = (htab->plt_initial_entry_size 4424 + (htab->plt_slot_size 4425 * ((s->size 4426 - htab->plt_initial_entry_size) 4427 / htab->plt_entry_size))); 4428 4429 /* If this symbol is not defined in a regular 4430 file, and we are not generating a shared 4431 library, then set the symbol to this location 4432 in the .plt. This is required to make 4433 function pointers compare as equal between 4434 the normal executable and the shared library. */ 4435 if (! info->shared 4436 && !h->def_regular) 4437 { 4438 h->root.u.def.section = s; 4439 h->root.u.def.value = plt_offset; 4440 } 4441 4442 /* Make room for this entry. */ 4443 s->size += htab->plt_entry_size; 4444 /* After the 8192nd entry, room for two entries 4445 is allocated. */ 4446 if (htab->plt_type == PLT_OLD 4447 && (s->size - htab->plt_initial_entry_size) 4448 / htab->plt_entry_size 4449 > PLT_NUM_SINGLE_ENTRIES) 4450 s->size += htab->plt_entry_size; 4451 } 4452 ent->plt.offset = plt_offset; 4453 } 4454 4455 /* We also need to make an entry in the .rela.plt section. */ 4456 if (!doneone) 4457 { 4458 htab->relplt->size += sizeof (Elf32_External_Rela); 4459 4460 if (htab->plt_type == PLT_VXWORKS) 4461 { 4462 /* Allocate space for the unloaded relocations. */ 4463 if (!info->shared) 4464 { 4465 if (ent->plt.offset 4466 == (bfd_vma) htab->plt_initial_entry_size) 4467 { 4468 htab->srelplt2->size 4469 += sizeof (Elf32_External_Rela) 4470 * VXWORKS_PLTRESOLVE_RELOCS; 4471 } 4472 4473 htab->srelplt2->size 4474 += sizeof (Elf32_External_Rela) 4475 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS; 4476 } 4477 4478 /* Every PLT entry has an associated GOT entry in 4479 .got.plt. */ 4480 htab->sgotplt->size += 4; 4481 } 4482 doneone = TRUE; 4483 } 4484 } 4485 else 4486 ent->plt.offset = (bfd_vma) -1; 4487 4488 if (!doneone) 4489 { 4490 h->plt.plist = NULL; 4491 h->needs_plt = 0; 4492 } 4493 } 4494 } 4495 else 4496 { 4497 h->plt.plist = NULL; 4498 h->needs_plt = 0; 4499 } 4500 4501 eh = (struct ppc_elf_link_hash_entry *) h; 4502 if (eh->elf.got.refcount > 0) 4503 { 4504 /* Make sure this symbol is output as a dynamic symbol. */ 4505 if (eh->elf.dynindx == -1 4506 && !eh->elf.forced_local) 4507 { 4508 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf)) 4509 return FALSE; 4510 } 4511 4512 if (eh->tls_mask == (TLS_TLS | TLS_LD) 4513 && !eh->elf.def_dynamic) 4514 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */ 4515 eh->elf.got.offset = (bfd_vma) -1; 4516 else 4517 { 4518 bfd_boolean dyn; 4519 unsigned int need = 0; 4520 if ((eh->tls_mask & TLS_TLS) != 0) 4521 { 4522 if ((eh->tls_mask & TLS_LD) != 0) 4523 need += 8; 4524 if ((eh->tls_mask & TLS_GD) != 0) 4525 need += 8; 4526 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0) 4527 need += 4; 4528 if ((eh->tls_mask & TLS_DTPREL) != 0) 4529 need += 4; 4530 } 4531 else 4532 need += 4; 4533 eh->elf.got.offset = allocate_got (htab, need); 4534 dyn = htab->elf.dynamic_sections_created; 4535 if ((info->shared 4536 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf)) 4537 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT 4538 || eh->elf.root.type != bfd_link_hash_undefweak)) 4539 { 4540 /* All the entries we allocated need relocs. 4541 Except LD only needs one. */ 4542 if ((eh->tls_mask & TLS_LD) != 0) 4543 need -= 4; 4544 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4); 4545 } 4546 } 4547 } 4548 else 4549 eh->elf.got.offset = (bfd_vma) -1; 4550 4551 if (eh->dyn_relocs == NULL) 4552 return TRUE; 4553 4554 /* In the shared -Bsymbolic case, discard space allocated for 4555 dynamic pc-relative relocs against symbols which turn out to be 4556 defined in regular objects. For the normal shared case, discard 4557 space for relocs that have become local due to symbol visibility 4558 changes. */ 4559 4560 if (info->shared) 4561 { 4562 /* Relocs that use pc_count are those that appear on a call insn, 4563 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be 4564 generated via assembly. We want calls to protected symbols to 4565 resolve directly to the function rather than going via the plt. 4566 If people want function pointer comparisons to work as expected 4567 then they should avoid writing weird assembly. */ 4568 if (SYMBOL_CALLS_LOCAL (info, h)) 4569 { 4570 struct ppc_elf_dyn_relocs **pp; 4571 4572 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 4573 { 4574 p->count -= p->pc_count; 4575 p->pc_count = 0; 4576 if (p->count == 0) 4577 *pp = p->next; 4578 else 4579 pp = &p->next; 4580 } 4581 } 4582 4583 /* Also discard relocs on undefined weak syms with non-default 4584 visibility. */ 4585 if (eh->dyn_relocs != NULL 4586 && h->root.type == bfd_link_hash_undefweak) 4587 { 4588 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 4589 eh->dyn_relocs = NULL; 4590 4591 /* Make sure undefined weak symbols are output as a dynamic 4592 symbol in PIEs. */ 4593 else if (h->dynindx == -1 4594 && !h->forced_local) 4595 { 4596 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 4597 return FALSE; 4598 } 4599 } 4600 } 4601 else if (ELIMINATE_COPY_RELOCS) 4602 { 4603 /* For the non-shared case, discard space for relocs against 4604 symbols which turn out to need copy relocs or are not 4605 dynamic. */ 4606 4607 if (!h->non_got_ref 4608 && h->def_dynamic 4609 && !h->def_regular) 4610 { 4611 /* Make sure this symbol is output as a dynamic symbol. 4612 Undefined weak syms won't yet be marked as dynamic. */ 4613 if (h->dynindx == -1 4614 && !h->forced_local) 4615 { 4616 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 4617 return FALSE; 4618 } 4619 4620 /* If that succeeded, we know we'll be keeping all the 4621 relocs. */ 4622 if (h->dynindx != -1) 4623 goto keep; 4624 } 4625 4626 eh->dyn_relocs = NULL; 4627 4628 keep: ; 4629 } 4630 4631 /* Finally, allocate space. */ 4632 for (p = eh->dyn_relocs; p != NULL; p = p->next) 4633 { 4634 asection *sreloc = elf_section_data (p->sec)->sreloc; 4635 sreloc->size += p->count * sizeof (Elf32_External_Rela); 4636 } 4637 4638 return TRUE; 4639} 4640 4641/* Find any dynamic relocs that apply to read-only sections. */ 4642 4643static bfd_boolean 4644readonly_dynrelocs (struct elf_link_hash_entry *h, void *info) 4645{ 4646 struct ppc_elf_dyn_relocs *p; 4647 4648 if (h->root.type == bfd_link_hash_indirect) 4649 return TRUE; 4650 4651 if (h->root.type == bfd_link_hash_warning) 4652 h = (struct elf_link_hash_entry *) h->root.u.i.link; 4653 4654 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) 4655 { 4656 asection *s = p->sec->output_section; 4657 4658 if (s != NULL 4659 && ((s->flags & (SEC_READONLY | SEC_ALLOC)) 4660 == (SEC_READONLY | SEC_ALLOC))) 4661 { 4662 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL; 4663 4664 /* Not an error, just cut short the traversal. */ 4665 return FALSE; 4666 } 4667 } 4668 return TRUE; 4669} 4670 4671/* Set the sizes of the dynamic sections. */ 4672 4673static bfd_boolean 4674ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 4675 struct bfd_link_info *info) 4676{ 4677 struct ppc_elf_link_hash_table *htab; 4678 asection *s; 4679 bfd_boolean relocs; 4680 bfd *ibfd; 4681 4682#ifdef DEBUG 4683 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); 4684#endif 4685 4686 htab = ppc_elf_hash_table (info); 4687 BFD_ASSERT (htab->elf.dynobj != NULL); 4688 4689 if (elf_hash_table (info)->dynamic_sections_created) 4690 { 4691 /* Set the contents of the .interp section to the interpreter. */ 4692 if (info->executable) 4693 { 4694 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp"); 4695 BFD_ASSERT (s != NULL); 4696 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 4697 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 4698 } 4699 } 4700 4701 if (htab->plt_type == PLT_OLD) 4702 htab->got_header_size = 16; 4703 else if (htab->plt_type == PLT_NEW) 4704 htab->got_header_size = 12; 4705 4706 /* Set up .got offsets for local syms, and space for local dynamic 4707 relocs. */ 4708 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 4709 { 4710 bfd_signed_vma *local_got; 4711 bfd_signed_vma *end_local_got; 4712 char *lgot_masks; 4713 bfd_size_type locsymcount; 4714 Elf_Internal_Shdr *symtab_hdr; 4715 4716 if (!is_ppc_elf_target (ibfd->xvec)) 4717 continue; 4718 4719 for (s = ibfd->sections; s != NULL; s = s->next) 4720 { 4721 struct ppc_elf_dyn_relocs *p; 4722 4723 for (p = ((struct ppc_elf_dyn_relocs *) 4724 elf_section_data (s)->local_dynrel); 4725 p != NULL; 4726 p = p->next) 4727 { 4728 if (!bfd_is_abs_section (p->sec) 4729 && bfd_is_abs_section (p->sec->output_section)) 4730 { 4731 /* Input section has been discarded, either because 4732 it is a copy of a linkonce section or due to 4733 linker script /DISCARD/, so we'll be discarding 4734 the relocs too. */ 4735 } 4736 else if (p->count != 0) 4737 { 4738 elf_section_data (p->sec)->sreloc->size 4739 += p->count * sizeof (Elf32_External_Rela); 4740 if ((p->sec->output_section->flags 4741 & (SEC_READONLY | SEC_ALLOC)) 4742 == (SEC_READONLY | SEC_ALLOC)) 4743 info->flags |= DF_TEXTREL; 4744 } 4745 } 4746 } 4747 4748 local_got = elf_local_got_refcounts (ibfd); 4749 if (!local_got) 4750 continue; 4751 4752 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 4753 locsymcount = symtab_hdr->sh_info; 4754 end_local_got = local_got + locsymcount; 4755 lgot_masks = (char *) end_local_got; 4756 for (; local_got < end_local_got; ++local_got, ++lgot_masks) 4757 if (*local_got > 0) 4758 { 4759 if (*lgot_masks == (TLS_TLS | TLS_LD)) 4760 { 4761 /* If just an LD reloc, we'll just use 4762 htab->tlsld_got.offset. */ 4763 htab->tlsld_got.refcount += 1; 4764 *local_got = (bfd_vma) -1; 4765 } 4766 else 4767 { 4768 unsigned int need = 0; 4769 if ((*lgot_masks & TLS_TLS) != 0) 4770 { 4771 if ((*lgot_masks & TLS_GD) != 0) 4772 need += 8; 4773 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0) 4774 need += 4; 4775 if ((*lgot_masks & TLS_DTPREL) != 0) 4776 need += 4; 4777 } 4778 else 4779 need += 4; 4780 *local_got = allocate_got (htab, need); 4781 if (info->shared) 4782 htab->relgot->size += (need 4783 * (sizeof (Elf32_External_Rela) / 4)); 4784 } 4785 } 4786 else 4787 *local_got = (bfd_vma) -1; 4788 } 4789 4790 if (htab->tlsld_got.refcount > 0) 4791 { 4792 htab->tlsld_got.offset = allocate_got (htab, 8); 4793 if (info->shared) 4794 htab->relgot->size += sizeof (Elf32_External_Rela); 4795 } 4796 else 4797 htab->tlsld_got.offset = (bfd_vma) -1; 4798 4799 /* Allocate space for global sym dynamic relocs. */ 4800 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); 4801 4802 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS) 4803 { 4804 unsigned int g_o_t = 32768; 4805 4806 /* If we haven't allocated the header, do so now. When we get here, 4807 for old plt/got the got size will be 0 to 32764 (not allocated), 4808 or 32780 to 65536 (header allocated). For new plt/got, the 4809 corresponding ranges are 0 to 32768 and 32780 to 65536. */ 4810 if (htab->got->size <= 32768) 4811 { 4812 g_o_t = htab->got->size; 4813 if (htab->plt_type == PLT_OLD) 4814 g_o_t += 4; 4815 htab->got->size += htab->got_header_size; 4816 } 4817 4818 htab->elf.hgot->root.u.def.value = g_o_t; 4819 } 4820 4821 if (htab->glink != NULL && htab->glink->size != 0) 4822 { 4823 htab->glink_pltresolve = htab->glink->size; 4824 /* Space for the branch table. */ 4825 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4; 4826 /* Pad out to align the start of PLTresolve. */ 4827 htab->glink->size += -htab->glink->size & 15; 4828 htab->glink->size += GLINK_PLTRESOLVE; 4829 4830 if (htab->emit_stub_syms) 4831 { 4832 struct elf_link_hash_entry *sh; 4833 sh = elf_link_hash_lookup (&htab->elf, "__glink", 4834 TRUE, FALSE, FALSE); 4835 if (sh == NULL) 4836 return FALSE; 4837 if (sh->root.type == bfd_link_hash_new) 4838 { 4839 sh->root.type = bfd_link_hash_defined; 4840 sh->root.u.def.section = htab->glink; 4841 sh->root.u.def.value = htab->glink_pltresolve; 4842 sh->ref_regular = 1; 4843 sh->def_regular = 1; 4844 sh->ref_regular_nonweak = 1; 4845 sh->forced_local = 1; 4846 sh->non_elf = 0; 4847 } 4848 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve", 4849 TRUE, FALSE, FALSE); 4850 if (sh == NULL) 4851 return FALSE; 4852 if (sh->root.type == bfd_link_hash_new) 4853 { 4854 sh->root.type = bfd_link_hash_defined; 4855 sh->root.u.def.section = htab->glink; 4856 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE; 4857 sh->ref_regular = 1; 4858 sh->def_regular = 1; 4859 sh->ref_regular_nonweak = 1; 4860 sh->forced_local = 1; 4861 sh->non_elf = 0; 4862 } 4863 } 4864 } 4865 4866 /* We've now determined the sizes of the various dynamic sections. 4867 Allocate memory for them. */ 4868 relocs = FALSE; 4869 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next) 4870 { 4871 bfd_boolean strip_section = TRUE; 4872 4873 if ((s->flags & SEC_LINKER_CREATED) == 0) 4874 continue; 4875 4876 if (s == htab->plt 4877 || s == htab->glink 4878 || s == htab->got 4879 || s == htab->sgotplt 4880 || s == htab->sbss 4881 || s == htab->dynbss 4882 || s == htab->dynsbss) 4883 { 4884 /* We'd like to strip these sections if they aren't needed, but if 4885 we've exported dynamic symbols from them we must leave them. 4886 It's too late to tell BFD to get rid of the symbols. */ 4887 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL) 4888 strip_section = FALSE; 4889 /* Strip this section if we don't need it; see the 4890 comment below. */ 4891 } 4892 else if (s == htab->sdata[0].section 4893 || s == htab->sdata[1].section) 4894 { 4895 /* Strip these too. */ 4896 } 4897 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) 4898 { 4899 if (s->size != 0) 4900 { 4901 /* Remember whether there are any relocation sections. */ 4902 relocs = TRUE; 4903 4904 /* We use the reloc_count field as a counter if we need 4905 to copy relocs into the output file. */ 4906 s->reloc_count = 0; 4907 } 4908 } 4909 else 4910 { 4911 /* It's not one of our sections, so don't allocate space. */ 4912 continue; 4913 } 4914 4915 if (s->size == 0 && strip_section) 4916 { 4917 /* If we don't need this section, strip it from the 4918 output file. This is mostly to handle .rela.bss and 4919 .rela.plt. We must create both sections in 4920 create_dynamic_sections, because they must be created 4921 before the linker maps input sections to output 4922 sections. The linker does that before 4923 adjust_dynamic_symbol is called, and it is that 4924 function which decides whether anything needs to go 4925 into these sections. */ 4926 s->flags |= SEC_EXCLUDE; 4927 continue; 4928 } 4929 4930 if ((s->flags & SEC_HAS_CONTENTS) == 0) 4931 continue; 4932 4933 /* Allocate memory for the section contents. */ 4934 s->contents = bfd_zalloc (htab->elf.dynobj, s->size); 4935 if (s->contents == NULL) 4936 return FALSE; 4937 } 4938 4939 if (htab->elf.dynamic_sections_created) 4940 { 4941 /* Add some entries to the .dynamic section. We fill in the 4942 values later, in ppc_elf_finish_dynamic_sections, but we 4943 must add the entries now so that we get the correct size for 4944 the .dynamic section. The DT_DEBUG entry is filled in by the 4945 dynamic linker and used by the debugger. */ 4946#define add_dynamic_entry(TAG, VAL) \ 4947 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 4948 4949 if (info->executable) 4950 { 4951 if (!add_dynamic_entry (DT_DEBUG, 0)) 4952 return FALSE; 4953 } 4954 4955 if (htab->plt != NULL && htab->plt->size != 0) 4956 { 4957 if (!add_dynamic_entry (DT_PLTGOT, 0) 4958 || !add_dynamic_entry (DT_PLTRELSZ, 0) 4959 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 4960 || !add_dynamic_entry (DT_JMPREL, 0)) 4961 return FALSE; 4962 } 4963 4964 if (htab->glink != NULL && htab->glink->size != 0) 4965 { 4966 if (!add_dynamic_entry (DT_PPC_GOT, 0)) 4967 return FALSE; 4968 } 4969 4970 if (relocs) 4971 { 4972 if (!add_dynamic_entry (DT_RELA, 0) 4973 || !add_dynamic_entry (DT_RELASZ, 0) 4974 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 4975 return FALSE; 4976 } 4977 4978 /* If any dynamic relocs apply to a read-only section, then we 4979 need a DT_TEXTREL entry. */ 4980 if ((info->flags & DF_TEXTREL) == 0) 4981 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs, 4982 info); 4983 4984 if ((info->flags & DF_TEXTREL) != 0) 4985 { 4986 if (!add_dynamic_entry (DT_TEXTREL, 0)) 4987 return FALSE; 4988 } 4989 } 4990#undef add_dynamic_entry 4991 4992 return TRUE; 4993} 4994 4995#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) 4996 4997static const int shared_stub_entry[] = 4998 { 4999 0x7c0802a6, /* mflr 0 */ 5000 0x429f0005, /* bcl 20, 31, .Lxxx */ 5001 0x7d6802a6, /* mflr 11 */ 5002 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */ 5003 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */ 5004 0x7c0803a6, /* mtlr 0 */ 5005 0x7d6903a6, /* mtctr 11 */ 5006 0x4e800420, /* bctr */ 5007 }; 5008 5009static const int stub_entry[] = 5010 { 5011 0x3d600000, /* lis 11,xxx@ha */ 5012 0x396b0000, /* addi 11,11,xxx@l */ 5013 0x7d6903a6, /* mtctr 11 */ 5014 0x4e800420, /* bctr */ 5015 }; 5016 5017static bfd_boolean 5018ppc_elf_relax_section (bfd *abfd, 5019 asection *isec, 5020 struct bfd_link_info *link_info, 5021 bfd_boolean *again) 5022{ 5023 struct one_fixup 5024 { 5025 struct one_fixup *next; 5026 asection *tsec; 5027 bfd_vma toff; 5028 bfd_vma trampoff; 5029 }; 5030 5031 Elf_Internal_Shdr *symtab_hdr; 5032 bfd_byte *contents = NULL; 5033 Elf_Internal_Sym *isymbuf = NULL; 5034 Elf_Internal_Rela *internal_relocs = NULL; 5035 Elf_Internal_Rela *irel, *irelend; 5036 struct one_fixup *fixups = NULL; 5037 bfd_boolean changed; 5038 struct ppc_elf_link_hash_table *htab; 5039 bfd_size_type trampoff; 5040 asection *got2; 5041 5042 *again = FALSE; 5043 5044 /* Nothing to do if there are no relocations, and no need to do 5045 anything with non-alloc sections. */ 5046 if ((isec->flags & SEC_ALLOC) == 0 5047 || (isec->flags & SEC_RELOC) == 0 5048 || isec->reloc_count == 0) 5049 return TRUE; 5050 5051 trampoff = (isec->size + 3) & (bfd_vma) -4; 5052 /* Space for a branch around any trampolines. */ 5053 trampoff += 4; 5054 5055 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 5056 5057 /* Get a copy of the native relocations. */ 5058 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, 5059 link_info->keep_memory); 5060 if (internal_relocs == NULL) 5061 goto error_return; 5062 5063 htab = ppc_elf_hash_table (link_info); 5064 got2 = bfd_get_section_by_name (abfd, ".got2"); 5065 5066 irelend = internal_relocs + isec->reloc_count; 5067 for (irel = internal_relocs; irel < irelend; irel++) 5068 { 5069 unsigned long r_type = ELF32_R_TYPE (irel->r_info); 5070 bfd_vma symaddr, reladdr, toff, roff; 5071 asection *tsec; 5072 struct one_fixup *f; 5073 size_t insn_offset = 0; 5074 bfd_vma max_branch_offset, val; 5075 bfd_byte *hit_addr; 5076 unsigned long t0; 5077 unsigned char sym_type; 5078 5079 switch (r_type) 5080 { 5081 case R_PPC_REL24: 5082 case R_PPC_LOCAL24PC: 5083 case R_PPC_PLTREL24: 5084 max_branch_offset = 1 << 25; 5085 break; 5086 5087 case R_PPC_REL14: 5088 case R_PPC_REL14_BRTAKEN: 5089 case R_PPC_REL14_BRNTAKEN: 5090 max_branch_offset = 1 << 15; 5091 break; 5092 5093 default: 5094 continue; 5095 } 5096 5097 /* Get the value of the symbol referred to by the reloc. */ 5098 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 5099 { 5100 /* A local symbol. */ 5101 Elf_Internal_Sym *isym; 5102 5103 /* Read this BFD's local symbols. */ 5104 if (isymbuf == NULL) 5105 { 5106 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 5107 if (isymbuf == NULL) 5108 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 5109 symtab_hdr->sh_info, 0, 5110 NULL, NULL, NULL); 5111 if (isymbuf == 0) 5112 goto error_return; 5113 } 5114 isym = isymbuf + ELF32_R_SYM (irel->r_info); 5115 if (isym->st_shndx == SHN_UNDEF) 5116 continue; /* We can't do anything with undefined symbols. */ 5117 else if (isym->st_shndx == SHN_ABS) 5118 tsec = bfd_abs_section_ptr; 5119 else if (isym->st_shndx == SHN_COMMON) 5120 tsec = bfd_com_section_ptr; 5121 else 5122 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); 5123 5124 toff = isym->st_value; 5125 sym_type = ELF_ST_TYPE (isym->st_info); 5126 } 5127 else 5128 { 5129 /* Global symbol handling. */ 5130 unsigned long indx; 5131 struct elf_link_hash_entry *h; 5132 5133 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 5134 h = elf_sym_hashes (abfd)[indx]; 5135 5136 while (h->root.type == bfd_link_hash_indirect 5137 || h->root.type == bfd_link_hash_warning) 5138 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5139 5140 tsec = NULL; 5141 toff = 0; 5142 if (r_type == R_PPC_PLTREL24 5143 && htab->plt != NULL) 5144 { 5145 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend); 5146 5147 if (ent != NULL) 5148 { 5149 if (htab->plt_type == PLT_NEW) 5150 { 5151 tsec = htab->glink; 5152 toff = ent->glink_offset; 5153 } 5154 else 5155 { 5156 tsec = htab->plt; 5157 toff = ent->plt.offset; 5158 } 5159 } 5160 } 5161 if (tsec != NULL) 5162 ; 5163 else if (h->root.type == bfd_link_hash_defined 5164 || h->root.type == bfd_link_hash_defweak) 5165 { 5166 tsec = h->root.u.def.section; 5167 toff = h->root.u.def.value; 5168 } 5169 else 5170 continue; 5171 5172 sym_type = h->type; 5173 } 5174 5175 /* If the branch and target are in the same section, you have 5176 no hope of adding stubs. We'll error out later should the 5177 branch overflow. */ 5178 if (tsec == isec) 5179 continue; 5180 5181 /* There probably isn't any reason to handle symbols in 5182 SEC_MERGE sections; SEC_MERGE doesn't seem a likely 5183 attribute for a code section, and we are only looking at 5184 branches. However, implement it correctly here as a 5185 reference for other target relax_section functions. */ 5186 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE) 5187 { 5188 /* At this stage in linking, no SEC_MERGE symbol has been 5189 adjusted, so all references to such symbols need to be 5190 passed through _bfd_merged_section_offset. (Later, in 5191 relocate_section, all SEC_MERGE symbols *except* for 5192 section symbols have been adjusted.) 5193 5194 gas may reduce relocations against symbols in SEC_MERGE 5195 sections to a relocation against the section symbol when 5196 the original addend was zero. When the reloc is against 5197 a section symbol we should include the addend in the 5198 offset passed to _bfd_merged_section_offset, since the 5199 location of interest is the original symbol. On the 5200 other hand, an access to "sym+addend" where "sym" is not 5201 a section symbol should not include the addend; Such an 5202 access is presumed to be an offset from "sym"; The 5203 location of interest is just "sym". */ 5204 if (sym_type == STT_SECTION) 5205 toff += irel->r_addend; 5206 5207 toff = _bfd_merged_section_offset (abfd, &tsec, 5208 elf_section_data (tsec)->sec_info, 5209 toff); 5210 5211 if (sym_type != STT_SECTION) 5212 toff += irel->r_addend; 5213 } 5214 /* PLTREL24 addends are special. */ 5215 else if (r_type != R_PPC_PLTREL24) 5216 toff += irel->r_addend; 5217 5218 /* Attempted -shared link of non-pic code loses. */ 5219 if (tsec->output_section == NULL) 5220 continue; 5221 5222 symaddr = tsec->output_section->vma + tsec->output_offset + toff; 5223 5224 roff = irel->r_offset; 5225 reladdr = isec->output_section->vma + isec->output_offset + roff; 5226 5227 /* If the branch is in range, no need to do anything. */ 5228 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset) 5229 continue; 5230 5231 /* Look for an existing fixup to this address. */ 5232 for (f = fixups; f ; f = f->next) 5233 if (f->tsec == tsec && f->toff == toff) 5234 break; 5235 5236 if (f == NULL) 5237 { 5238 size_t size; 5239 unsigned long stub_rtype; 5240 5241 val = trampoff - roff; 5242 if (val >= max_branch_offset) 5243 /* Oh dear, we can't reach a trampoline. Don't try to add 5244 one. We'll report an error later. */ 5245 continue; 5246 5247 if (link_info->shared) 5248 { 5249 size = 4 * ARRAY_SIZE (shared_stub_entry); 5250 insn_offset = 12; 5251 stub_rtype = R_PPC_RELAX32PC; 5252 } 5253 else 5254 { 5255 size = 4 * ARRAY_SIZE (stub_entry); 5256 insn_offset = 0; 5257 stub_rtype = R_PPC_RELAX32; 5258 } 5259 5260 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32 5261 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC) 5262 abort (); 5263 if (tsec == htab->plt 5264 || tsec == htab->glink) 5265 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32; 5266 5267 /* Hijack the old relocation. Since we need two 5268 relocations for this use a "composite" reloc. */ 5269 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 5270 stub_rtype); 5271 irel->r_offset = trampoff + insn_offset; 5272 5273 /* Record the fixup so we don't do it again this section. */ 5274 f = bfd_malloc (sizeof (*f)); 5275 f->next = fixups; 5276 f->tsec = tsec; 5277 f->toff = toff; 5278 f->trampoff = trampoff; 5279 fixups = f; 5280 5281 trampoff += size; 5282 } 5283 else 5284 { 5285 val = f->trampoff - roff; 5286 if (val >= max_branch_offset) 5287 continue; 5288 5289 /* Nop out the reloc, since we're finalizing things here. */ 5290 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); 5291 } 5292 5293 /* Get the section contents. */ 5294 if (contents == NULL) 5295 { 5296 /* Get cached copy if it exists. */ 5297 if (elf_section_data (isec)->this_hdr.contents != NULL) 5298 contents = elf_section_data (isec)->this_hdr.contents; 5299 else 5300 { 5301 /* Go get them off disk. */ 5302 if (!bfd_malloc_and_get_section (abfd, isec, &contents)) 5303 goto error_return; 5304 } 5305 } 5306 5307 /* Fix up the existing branch to hit the trampoline. */ 5308 hit_addr = contents + roff; 5309 switch (r_type) 5310 { 5311 case R_PPC_REL24: 5312 case R_PPC_LOCAL24PC: 5313 case R_PPC_PLTREL24: 5314 t0 = bfd_get_32 (abfd, hit_addr); 5315 t0 &= ~0x3fffffc; 5316 t0 |= val & 0x3fffffc; 5317 bfd_put_32 (abfd, t0, hit_addr); 5318 break; 5319 5320 case R_PPC_REL14: 5321 case R_PPC_REL14_BRTAKEN: 5322 case R_PPC_REL14_BRNTAKEN: 5323 t0 = bfd_get_32 (abfd, hit_addr); 5324 t0 &= ~0xfffc; 5325 t0 |= val & 0xfffc; 5326 bfd_put_32 (abfd, t0, hit_addr); 5327 break; 5328 } 5329 } 5330 5331 /* Write out the trampolines. */ 5332 changed = fixups != NULL; 5333 if (fixups != NULL) 5334 { 5335 const int *stub; 5336 bfd_byte *dest; 5337 bfd_vma val; 5338 int i, size; 5339 5340 do 5341 { 5342 struct one_fixup *f = fixups; 5343 fixups = fixups->next; 5344 free (f); 5345 } 5346 while (fixups); 5347 5348 contents = bfd_realloc (contents, trampoff); 5349 if (contents == NULL) 5350 goto error_return; 5351 5352 isec->size = (isec->size + 3) & (bfd_vma) -4; 5353 /* Branch around the trampolines. */ 5354 val = trampoff - isec->size + 0x48000000; 5355 dest = contents + isec->size; 5356 isec->size = trampoff; 5357 bfd_put_32 (abfd, val, dest); 5358 dest += 4; 5359 5360 if (link_info->shared) 5361 { 5362 stub = shared_stub_entry; 5363 size = ARRAY_SIZE (shared_stub_entry); 5364 } 5365 else 5366 { 5367 stub = stub_entry; 5368 size = ARRAY_SIZE (stub_entry); 5369 } 5370 5371 i = 0; 5372 while (dest < contents + trampoff) 5373 { 5374 bfd_put_32 (abfd, stub[i], dest); 5375 i++; 5376 if (i == size) 5377 i = 0; 5378 dest += 4; 5379 } 5380 BFD_ASSERT (i == 0); 5381 } 5382 5383 if (isymbuf != NULL 5384 && symtab_hdr->contents != (unsigned char *) isymbuf) 5385 { 5386 if (! link_info->keep_memory) 5387 free (isymbuf); 5388 else 5389 { 5390 /* Cache the symbols for elf_link_input_bfd. */ 5391 symtab_hdr->contents = (unsigned char *) isymbuf; 5392 } 5393 } 5394 5395 if (contents != NULL 5396 && elf_section_data (isec)->this_hdr.contents != contents) 5397 { 5398 if (!changed && !link_info->keep_memory) 5399 free (contents); 5400 else 5401 { 5402 /* Cache the section contents for elf_link_input_bfd. */ 5403 elf_section_data (isec)->this_hdr.contents = contents; 5404 } 5405 } 5406 5407 if (elf_section_data (isec)->relocs != internal_relocs) 5408 { 5409 if (!changed) 5410 free (internal_relocs); 5411 else 5412 elf_section_data (isec)->relocs = internal_relocs; 5413 } 5414 5415 *again = changed; 5416 return TRUE; 5417 5418 error_return: 5419 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) 5420 free (isymbuf); 5421 if (contents != NULL 5422 && elf_section_data (isec)->this_hdr.contents != contents) 5423 free (contents); 5424 if (internal_relocs != NULL 5425 && elf_section_data (isec)->relocs != internal_relocs) 5426 free (internal_relocs); 5427 return FALSE; 5428} 5429 5430/* What to do when ld finds relocations against symbols defined in 5431 discarded sections. */ 5432 5433static unsigned int 5434ppc_elf_action_discarded (asection *sec) 5435{ 5436 if (strcmp (".fixup", sec->name) == 0) 5437 return 0; 5438 5439 if (strcmp (".got2", sec->name) == 0) 5440 return 0; 5441 5442 return _bfd_elf_default_action_discarded (sec); 5443} 5444 5445/* Fill in the address for a pointer generated in a linker section. */ 5446 5447static bfd_vma 5448elf_finish_pointer_linker_section (bfd *input_bfd, 5449 elf_linker_section_t *lsect, 5450 struct elf_link_hash_entry *h, 5451 bfd_vma relocation, 5452 const Elf_Internal_Rela *rel) 5453{ 5454 elf_linker_section_pointers_t *linker_section_ptr; 5455 5456 BFD_ASSERT (lsect != NULL); 5457 5458 if (h != NULL) 5459 { 5460 /* Handle global symbol. */ 5461 struct ppc_elf_link_hash_entry *eh; 5462 5463 eh = (struct ppc_elf_link_hash_entry *) h; 5464 BFD_ASSERT (eh->elf.def_regular); 5465 linker_section_ptr = eh->linker_section_pointer; 5466 } 5467 else 5468 { 5469 /* Handle local symbol. */ 5470 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 5471 5472 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); 5473 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx]; 5474 } 5475 5476 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr, 5477 rel->r_addend, 5478 lsect); 5479 BFD_ASSERT (linker_section_ptr != NULL); 5480 5481 /* Offset will always be a multiple of four, so use the bottom bit 5482 as a "written" flag. */ 5483 if ((linker_section_ptr->offset & 1) == 0) 5484 { 5485 bfd_put_32 (lsect->section->owner, 5486 relocation + linker_section_ptr->addend, 5487 lsect->section->contents + linker_section_ptr->offset); 5488 linker_section_ptr->offset += 1; 5489 } 5490 5491 relocation = (lsect->section->output_offset 5492 + linker_section_ptr->offset - 1 5493 - 0x8000); 5494 5495#ifdef DEBUG 5496 fprintf (stderr, 5497 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", 5498 lsect->name, (long) relocation, (long) relocation); 5499#endif 5500 5501 /* Subtract out the addend, because it will get added back in by the normal 5502 processing. */ 5503 return relocation - linker_section_ptr->addend; 5504} 5505 5506/* The RELOCATE_SECTION function is called by the ELF backend linker 5507 to handle the relocations for a section. 5508 5509 The relocs are always passed as Rela structures; if the section 5510 actually uses Rel structures, the r_addend field will always be 5511 zero. 5512 5513 This function is responsible for adjust the section contents as 5514 necessary, and (if using Rela relocs and generating a 5515 relocatable output file) adjusting the reloc addend as 5516 necessary. 5517 5518 This function does not have to worry about setting the reloc 5519 address or the reloc symbol index. 5520 5521 LOCAL_SYMS is a pointer to the swapped in local symbols. 5522 5523 LOCAL_SECTIONS is an array giving the section in the input file 5524 corresponding to the st_shndx field of each local symbol. 5525 5526 The global hash table entry for the global symbols can be found 5527 via elf_sym_hashes (input_bfd). 5528 5529 When generating relocatable output, this function must handle 5530 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 5531 going to be the section symbol corresponding to the output 5532 section, which means that the addend must be adjusted 5533 accordingly. */ 5534 5535static bfd_boolean 5536ppc_elf_relocate_section (bfd *output_bfd, 5537 struct bfd_link_info *info, 5538 bfd *input_bfd, 5539 asection *input_section, 5540 bfd_byte *contents, 5541 Elf_Internal_Rela *relocs, 5542 Elf_Internal_Sym *local_syms, 5543 asection **local_sections) 5544{ 5545 Elf_Internal_Shdr *symtab_hdr; 5546 struct elf_link_hash_entry **sym_hashes; 5547 struct ppc_elf_link_hash_table *htab; 5548 Elf_Internal_Rela *rel; 5549 Elf_Internal_Rela *relend; 5550 Elf_Internal_Rela outrel; 5551 bfd_byte *loc; 5552 asection *got2, *sreloc = NULL; 5553 bfd_vma *local_got_offsets; 5554 bfd_boolean ret = TRUE; 5555 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0); 5556 5557#ifdef DEBUG 5558 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, " 5559 "%ld relocations%s", 5560 input_bfd, input_section, 5561 (long) input_section->reloc_count, 5562 (info->relocatable) ? " (relocatable)" : ""); 5563#endif 5564 5565 got2 = bfd_get_section_by_name (input_bfd, ".got2"); 5566 5567 if (info->relocatable) 5568 { 5569 if (got2 == NULL) 5570 return TRUE; 5571 5572 rel = relocs; 5573 relend = relocs + input_section->reloc_count; 5574 for (; rel < relend; rel++) 5575 { 5576 enum elf_ppc_reloc_type r_type; 5577 5578 r_type = ELF32_R_TYPE (rel->r_info); 5579 if (r_type == R_PPC_PLTREL24 5580 && rel->r_addend >= 32768) 5581 { 5582 /* R_PPC_PLTREL24 is rather special. If non-zero, the 5583 addend specifies the GOT pointer offset within .got2. */ 5584 rel->r_addend += got2->output_offset; 5585 } 5586 } 5587 return TRUE; 5588 } 5589 5590 /* Initialize howto table if not already done. */ 5591 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 5592 ppc_elf_howto_init (); 5593 5594 htab = ppc_elf_hash_table (info); 5595 local_got_offsets = elf_local_got_offsets (input_bfd); 5596 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 5597 sym_hashes = elf_sym_hashes (input_bfd); 5598 rel = relocs; 5599 relend = relocs + input_section->reloc_count; 5600 for (; rel < relend; rel++) 5601 { 5602 enum elf_ppc_reloc_type r_type; 5603 bfd_vma addend; 5604 bfd_reloc_status_type r; 5605 Elf_Internal_Sym *sym; 5606 asection *sec; 5607 struct elf_link_hash_entry *h; 5608 const char *sym_name; 5609 reloc_howto_type *howto; 5610 unsigned long r_symndx; 5611 bfd_vma relocation; 5612 bfd_vma branch_bit, insn, from; 5613 bfd_boolean unresolved_reloc; 5614 bfd_boolean warned; 5615 unsigned int tls_type, tls_mask, tls_gd; 5616 5617 r_type = ELF32_R_TYPE (rel->r_info); 5618 sym = NULL; 5619 sec = NULL; 5620 h = NULL; 5621 unresolved_reloc = FALSE; 5622 warned = FALSE; 5623 r_symndx = ELF32_R_SYM (rel->r_info); 5624 5625 if (r_symndx < symtab_hdr->sh_info) 5626 { 5627 sym = local_syms + r_symndx; 5628 sec = local_sections[r_symndx]; 5629 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); 5630 5631 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 5632 } 5633 else 5634 { 5635 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 5636 r_symndx, symtab_hdr, sym_hashes, 5637 h, sec, relocation, 5638 unresolved_reloc, warned); 5639 5640 sym_name = h->root.root.string; 5641 } 5642 5643 /* TLS optimizations. Replace instruction sequences and relocs 5644 based on information we collected in tls_optimize. We edit 5645 RELOCS so that --emit-relocs will output something sensible 5646 for the final instruction stream. */ 5647 tls_mask = 0; 5648 tls_gd = 0; 5649 if (IS_PPC_TLS_RELOC (r_type)) 5650 { 5651 if (h != NULL) 5652 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask; 5653 else if (local_got_offsets != NULL) 5654 { 5655 char *lgot_masks; 5656 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info); 5657 tls_mask = lgot_masks[r_symndx]; 5658 } 5659 } 5660 5661 /* Ensure reloc mapping code below stays sane. */ 5662 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3) 5663 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3) 5664 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3) 5665 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3) 5666 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3) 5667 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3) 5668 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3) 5669 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3)) 5670 abort (); 5671 switch (r_type) 5672 { 5673 default: 5674 break; 5675 5676 case R_PPC_GOT_TPREL16: 5677 case R_PPC_GOT_TPREL16_LO: 5678 if (tls_mask != 0 5679 && (tls_mask & TLS_TPREL) == 0) 5680 { 5681 bfd_vma insn; 5682 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset); 5683 insn &= 31 << 21; 5684 insn |= 0x3c020000; /* addis 0,2,0 */ 5685 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset); 5686 r_type = R_PPC_TPREL16_HA; 5687 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 5688 } 5689 break; 5690 5691 case R_PPC_TLS: 5692 if (tls_mask != 0 5693 && (tls_mask & TLS_TPREL) == 0) 5694 { 5695 bfd_vma insn, rtra; 5696 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 5697 if ((insn & ((31 << 26) | (31 << 11))) 5698 == ((31 << 26) | (2 << 11))) 5699 rtra = insn & ((1 << 26) - (1 << 16)); 5700 else if ((insn & ((31 << 26) | (31 << 16))) 5701 == ((31 << 26) | (2 << 16))) 5702 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5); 5703 else 5704 abort (); 5705 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1) 5706 /* add -> addi. */ 5707 insn = 14 << 26; 5708 else if ((insn & (31 << 1)) == 23 << 1 5709 && ((insn & (31 << 6)) < 14 << 6 5710 || ((insn & (31 << 6)) >= 16 << 6 5711 && (insn & (31 << 6)) < 24 << 6))) 5712 /* load and store indexed -> dform. */ 5713 insn = (32 | ((insn >> 6) & 31)) << 26; 5714 else if ((insn & (31 << 1)) == 21 << 1 5715 && (insn & (0x1a << 6)) == 0) 5716 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ 5717 insn = (((58 | ((insn >> 6) & 4)) << 26) 5718 | ((insn >> 6) & 1)); 5719 else if ((insn & (31 << 1)) == 21 << 1 5720 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1) 5721 /* lwax -> lwa. */ 5722 insn = (58 << 26) | 2; 5723 else 5724 abort (); 5725 insn |= rtra; 5726 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 5727 r_type = R_PPC_TPREL16_LO; 5728 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 5729 5730 /* Was PPC_TLS which sits on insn boundary, now 5731 PPC_TPREL16_LO which is at low-order half-word. */ 5732 rel->r_offset += d_offset; 5733 } 5734 break; 5735 5736 case R_PPC_GOT_TLSGD16_HI: 5737 case R_PPC_GOT_TLSGD16_HA: 5738 tls_gd = TLS_TPRELGD; 5739 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) 5740 goto tls_gdld_hi; 5741 break; 5742 5743 case R_PPC_GOT_TLSLD16_HI: 5744 case R_PPC_GOT_TLSLD16_HA: 5745 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) 5746 { 5747 tls_gdld_hi: 5748 if ((tls_mask & tls_gd) != 0) 5749 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 5750 + R_PPC_GOT_TPREL16); 5751 else 5752 { 5753 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); 5754 rel->r_offset -= d_offset; 5755 r_type = R_PPC_NONE; 5756 } 5757 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 5758 } 5759 break; 5760 5761 case R_PPC_GOT_TLSGD16: 5762 case R_PPC_GOT_TLSGD16_LO: 5763 tls_gd = TLS_TPRELGD; 5764 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) 5765 goto tls_get_addr_check; 5766 break; 5767 5768 case R_PPC_GOT_TLSLD16: 5769 case R_PPC_GOT_TLSLD16_LO: 5770 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) 5771 { 5772 tls_get_addr_check: 5773 if (rel + 1 < relend) 5774 { 5775 enum elf_ppc_reloc_type r_type2; 5776 unsigned long r_symndx2; 5777 struct elf_link_hash_entry *h2; 5778 bfd_vma insn1, insn2; 5779 bfd_vma offset; 5780 5781 /* The next instruction should be a call to 5782 __tls_get_addr. Peek at the reloc to be sure. */ 5783 r_type2 = ELF32_R_TYPE (rel[1].r_info); 5784 r_symndx2 = ELF32_R_SYM (rel[1].r_info); 5785 if (r_symndx2 < symtab_hdr->sh_info 5786 || (r_type2 != R_PPC_REL14 5787 && r_type2 != R_PPC_REL14_BRTAKEN 5788 && r_type2 != R_PPC_REL14_BRNTAKEN 5789 && r_type2 != R_PPC_REL24 5790 && r_type2 != R_PPC_PLTREL24)) 5791 break; 5792 5793 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info]; 5794 while (h2->root.type == bfd_link_hash_indirect 5795 || h2->root.type == bfd_link_hash_warning) 5796 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link; 5797 if (h2 == NULL || h2 != htab->tls_get_addr) 5798 break; 5799 5800 /* OK, it checks out. Replace the call. */ 5801 offset = rel[1].r_offset; 5802 insn1 = bfd_get_32 (output_bfd, 5803 contents + rel->r_offset - d_offset); 5804 if ((tls_mask & tls_gd) != 0) 5805 { 5806 /* IE */ 5807 insn1 &= (1 << 26) - 1; 5808 insn1 |= 32 << 26; /* lwz */ 5809 insn2 = 0x7c631214; /* add 3,3,2 */ 5810 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE); 5811 rel[1].r_addend = 0; 5812 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 5813 + R_PPC_GOT_TPREL16); 5814 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 5815 } 5816 else 5817 { 5818 /* LE */ 5819 insn1 = 0x3c620000; /* addis 3,2,0 */ 5820 insn2 = 0x38630000; /* addi 3,3,0 */ 5821 if (tls_gd == 0) 5822 { 5823 /* Was an LD reloc. */ 5824 r_symndx = 0; 5825 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 5826 } 5827 r_type = R_PPC_TPREL16_HA; 5828 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 5829 rel[1].r_info = ELF32_R_INFO (r_symndx, 5830 R_PPC_TPREL16_LO); 5831 rel[1].r_offset += d_offset; 5832 rel[1].r_addend = rel->r_addend; 5833 } 5834 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - d_offset); 5835 bfd_put_32 (output_bfd, insn2, contents + offset); 5836 if (tls_gd == 0) 5837 { 5838 /* We changed the symbol on an LD reloc. Start over 5839 in order to get h, sym, sec etc. right. */ 5840 rel--; 5841 continue; 5842 } 5843 } 5844 } 5845 break; 5846 } 5847 5848 /* Handle other relocations that tweak non-addend part of insn. */ 5849 branch_bit = 0; 5850 switch (r_type) 5851 { 5852 default: 5853 break; 5854 5855 /* Branch taken prediction relocations. */ 5856 case R_PPC_ADDR14_BRTAKEN: 5857 case R_PPC_REL14_BRTAKEN: 5858 branch_bit = BRANCH_PREDICT_BIT; 5859 /* Fall thru */ 5860 5861 /* Branch not taken prediction relocations. */ 5862 case R_PPC_ADDR14_BRNTAKEN: 5863 case R_PPC_REL14_BRNTAKEN: 5864 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 5865 insn &= ~BRANCH_PREDICT_BIT; 5866 insn |= branch_bit; 5867 5868 from = (rel->r_offset 5869 + input_section->output_offset 5870 + input_section->output_section->vma); 5871 5872 /* Invert 'y' bit if not the default. */ 5873 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) 5874 insn ^= BRANCH_PREDICT_BIT; 5875 5876 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 5877 break; 5878 } 5879 5880 addend = rel->r_addend; 5881 tls_type = 0; 5882 howto = NULL; 5883 if (r_type < R_PPC_max) 5884 howto = ppc_elf_howto_table[r_type]; 5885 switch (r_type) 5886 { 5887 default: 5888 (*_bfd_error_handler) 5889 (_("%B: unknown relocation type %d for symbol %s"), 5890 input_bfd, (int) r_type, sym_name); 5891 5892 bfd_set_error (bfd_error_bad_value); 5893 ret = FALSE; 5894 continue; 5895 5896 case R_PPC_NONE: 5897 case R_PPC_TLS: 5898 case R_PPC_EMB_MRKREF: 5899 case R_PPC_GNU_VTINHERIT: 5900 case R_PPC_GNU_VTENTRY: 5901 continue; 5902 5903 /* GOT16 relocations. Like an ADDR16 using the symbol's 5904 address in the GOT as relocation value instead of the 5905 symbol's value itself. Also, create a GOT entry for the 5906 symbol and put the symbol value there. */ 5907 case R_PPC_GOT_TLSGD16: 5908 case R_PPC_GOT_TLSGD16_LO: 5909 case R_PPC_GOT_TLSGD16_HI: 5910 case R_PPC_GOT_TLSGD16_HA: 5911 tls_type = TLS_TLS | TLS_GD; 5912 goto dogot; 5913 5914 case R_PPC_GOT_TLSLD16: 5915 case R_PPC_GOT_TLSLD16_LO: 5916 case R_PPC_GOT_TLSLD16_HI: 5917 case R_PPC_GOT_TLSLD16_HA: 5918 tls_type = TLS_TLS | TLS_LD; 5919 goto dogot; 5920 5921 case R_PPC_GOT_TPREL16: 5922 case R_PPC_GOT_TPREL16_LO: 5923 case R_PPC_GOT_TPREL16_HI: 5924 case R_PPC_GOT_TPREL16_HA: 5925 tls_type = TLS_TLS | TLS_TPREL; 5926 goto dogot; 5927 5928 case R_PPC_GOT_DTPREL16: 5929 case R_PPC_GOT_DTPREL16_LO: 5930 case R_PPC_GOT_DTPREL16_HI: 5931 case R_PPC_GOT_DTPREL16_HA: 5932 tls_type = TLS_TLS | TLS_DTPREL; 5933 goto dogot; 5934 5935 case R_PPC_GOT16: 5936 case R_PPC_GOT16_LO: 5937 case R_PPC_GOT16_HI: 5938 case R_PPC_GOT16_HA: 5939 dogot: 5940 { 5941 /* Relocation is to the entry for this symbol in the global 5942 offset table. */ 5943 bfd_vma off; 5944 bfd_vma *offp; 5945 unsigned long indx; 5946 5947 if (htab->got == NULL) 5948 abort (); 5949 5950 indx = 0; 5951 if (tls_type == (TLS_TLS | TLS_LD) 5952 && (h == NULL 5953 || !h->def_dynamic)) 5954 offp = &htab->tlsld_got.offset; 5955 else if (h != NULL) 5956 { 5957 bfd_boolean dyn; 5958 dyn = htab->elf.dynamic_sections_created; 5959 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 5960 || (info->shared 5961 && SYMBOL_REFERENCES_LOCAL (info, h))) 5962 /* This is actually a static link, or it is a 5963 -Bsymbolic link and the symbol is defined 5964 locally, or the symbol was forced to be local 5965 because of a version file. */ 5966 ; 5967 else 5968 { 5969 indx = h->dynindx; 5970 unresolved_reloc = FALSE; 5971 } 5972 offp = &h->got.offset; 5973 } 5974 else 5975 { 5976 if (local_got_offsets == NULL) 5977 abort (); 5978 offp = &local_got_offsets[r_symndx]; 5979 } 5980 5981 /* The offset must always be a multiple of 4. We use the 5982 least significant bit to record whether we have already 5983 processed this entry. */ 5984 off = *offp; 5985 if ((off & 1) != 0) 5986 off &= ~1; 5987 else 5988 { 5989 unsigned int tls_m = (tls_mask 5990 & (TLS_LD | TLS_GD | TLS_DTPREL 5991 | TLS_TPREL | TLS_TPRELGD)); 5992 5993 if (offp == &htab->tlsld_got.offset) 5994 tls_m = TLS_LD; 5995 else if (h == NULL 5996 || !h->def_dynamic) 5997 tls_m &= ~TLS_LD; 5998 5999 /* We might have multiple got entries for this sym. 6000 Initialize them all. */ 6001 do 6002 { 6003 int tls_ty = 0; 6004 6005 if ((tls_m & TLS_LD) != 0) 6006 { 6007 tls_ty = TLS_TLS | TLS_LD; 6008 tls_m &= ~TLS_LD; 6009 } 6010 else if ((tls_m & TLS_GD) != 0) 6011 { 6012 tls_ty = TLS_TLS | TLS_GD; 6013 tls_m &= ~TLS_GD; 6014 } 6015 else if ((tls_m & TLS_DTPREL) != 0) 6016 { 6017 tls_ty = TLS_TLS | TLS_DTPREL; 6018 tls_m &= ~TLS_DTPREL; 6019 } 6020 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0) 6021 { 6022 tls_ty = TLS_TLS | TLS_TPREL; 6023 tls_m = 0; 6024 } 6025 6026 /* Generate relocs for the dynamic linker. */ 6027 if ((info->shared || indx != 0) 6028 && (h == NULL 6029 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 6030 || h->root.type != bfd_link_hash_undefweak)) 6031 { 6032 outrel.r_offset = (htab->got->output_section->vma 6033 + htab->got->output_offset 6034 + off); 6035 outrel.r_addend = 0; 6036 if (tls_ty & (TLS_LD | TLS_GD)) 6037 { 6038 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32); 6039 if (tls_ty == (TLS_TLS | TLS_GD)) 6040 { 6041 loc = htab->relgot->contents; 6042 loc += (htab->relgot->reloc_count++ 6043 * sizeof (Elf32_External_Rela)); 6044 bfd_elf32_swap_reloca_out (output_bfd, 6045 &outrel, loc); 6046 outrel.r_offset += 4; 6047 outrel.r_info 6048 = ELF32_R_INFO (indx, R_PPC_DTPREL32); 6049 } 6050 } 6051 else if (tls_ty == (TLS_TLS | TLS_DTPREL)) 6052 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32); 6053 else if (tls_ty == (TLS_TLS | TLS_TPREL)) 6054 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32); 6055 else if (indx == 0) 6056 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE); 6057 else 6058 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT); 6059 if (indx == 0) 6060 { 6061 outrel.r_addend += relocation; 6062 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL)) 6063 outrel.r_addend -= htab->elf.tls_sec->vma; 6064 } 6065 loc = htab->relgot->contents; 6066 loc += (htab->relgot->reloc_count++ 6067 * sizeof (Elf32_External_Rela)); 6068 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 6069 } 6070 6071 /* Init the .got section contents if we're not 6072 emitting a reloc. */ 6073 else 6074 { 6075 bfd_vma value = relocation; 6076 6077 if (tls_ty == (TLS_TLS | TLS_LD)) 6078 value = 1; 6079 else if (tls_ty != 0) 6080 { 6081 value -= htab->elf.tls_sec->vma + DTP_OFFSET; 6082 if (tls_ty == (TLS_TLS | TLS_TPREL)) 6083 value += DTP_OFFSET - TP_OFFSET; 6084 6085 if (tls_ty == (TLS_TLS | TLS_GD)) 6086 { 6087 bfd_put_32 (output_bfd, value, 6088 htab->got->contents + off + 4); 6089 value = 1; 6090 } 6091 } 6092 bfd_put_32 (output_bfd, value, 6093 htab->got->contents + off); 6094 } 6095 6096 off += 4; 6097 if (tls_ty & (TLS_LD | TLS_GD)) 6098 off += 4; 6099 } 6100 while (tls_m != 0); 6101 6102 off = *offp; 6103 *offp = off | 1; 6104 } 6105 6106 if (off >= (bfd_vma) -2) 6107 abort (); 6108 6109 if ((tls_type & TLS_TLS) != 0) 6110 { 6111 if (tls_type != (TLS_TLS | TLS_LD)) 6112 { 6113 if ((tls_mask & TLS_LD) != 0 6114 && !(h == NULL 6115 || !h->def_dynamic)) 6116 off += 8; 6117 if (tls_type != (TLS_TLS | TLS_GD)) 6118 { 6119 if ((tls_mask & TLS_GD) != 0) 6120 off += 8; 6121 if (tls_type != (TLS_TLS | TLS_DTPREL)) 6122 { 6123 if ((tls_mask & TLS_DTPREL) != 0) 6124 off += 4; 6125 } 6126 } 6127 } 6128 } 6129 6130 relocation = htab->got->output_offset + off; 6131 relocation -= htab->elf.hgot->root.u.def.value; 6132 6133 /* Addends on got relocations don't make much sense. 6134 x+off@got is actually x@got+off, and since the got is 6135 generated by a hash table traversal, the value in the 6136 got at entry m+n bears little relation to the entry m. */ 6137 if (addend != 0) 6138 (*_bfd_error_handler) 6139 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"), 6140 input_bfd, 6141 input_section, 6142 (long) rel->r_offset, 6143 howto->name, 6144 sym_name); 6145 } 6146 break; 6147 6148 /* Relocations that need no special processing. */ 6149 case R_PPC_LOCAL24PC: 6150 /* It makes no sense to point a local relocation 6151 at a symbol not in this object. */ 6152 if (unresolved_reloc) 6153 { 6154 if (! (*info->callbacks->undefined_symbol) (info, 6155 h->root.root.string, 6156 input_bfd, 6157 input_section, 6158 rel->r_offset, 6159 TRUE)) 6160 return FALSE; 6161 continue; 6162 } 6163 break; 6164 6165 case R_PPC_DTPREL16: 6166 case R_PPC_DTPREL16_LO: 6167 case R_PPC_DTPREL16_HI: 6168 case R_PPC_DTPREL16_HA: 6169 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 6170 break; 6171 6172 /* Relocations that may need to be propagated if this is a shared 6173 object. */ 6174 case R_PPC_TPREL16: 6175 case R_PPC_TPREL16_LO: 6176 case R_PPC_TPREL16_HI: 6177 case R_PPC_TPREL16_HA: 6178 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 6179 /* The TPREL16 relocs shouldn't really be used in shared 6180 libs as they will result in DT_TEXTREL being set, but 6181 support them anyway. */ 6182 goto dodyn; 6183 6184 case R_PPC_TPREL32: 6185 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 6186 goto dodyn; 6187 6188 case R_PPC_DTPREL32: 6189 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 6190 goto dodyn; 6191 6192 case R_PPC_DTPMOD32: 6193 relocation = 1; 6194 addend = 0; 6195 goto dodyn; 6196 6197 case R_PPC_REL16: 6198 case R_PPC_REL16_LO: 6199 case R_PPC_REL16_HI: 6200 case R_PPC_REL16_HA: 6201 break; 6202 6203 case R_PPC_REL24: 6204 case R_PPC_REL32: 6205 case R_PPC_REL14: 6206 case R_PPC_REL14_BRTAKEN: 6207 case R_PPC_REL14_BRNTAKEN: 6208 /* If these relocations are not to a named symbol, they can be 6209 handled right here, no need to bother the dynamic linker. */ 6210 if (SYMBOL_REFERENCES_LOCAL (info, h) 6211 || h == htab->elf.hgot) 6212 break; 6213 /* fall through */ 6214 6215 /* Relocations that always need to be propagated if this is a shared 6216 object. */ 6217 case R_PPC_ADDR32: 6218 case R_PPC_ADDR24: 6219 case R_PPC_ADDR16: 6220 case R_PPC_ADDR16_LO: 6221 case R_PPC_ADDR16_HI: 6222 case R_PPC_ADDR16_HA: 6223 case R_PPC_ADDR14: 6224 case R_PPC_ADDR14_BRTAKEN: 6225 case R_PPC_ADDR14_BRNTAKEN: 6226 case R_PPC_UADDR32: 6227 case R_PPC_UADDR16: 6228 /* r_symndx will be zero only for relocs against symbols 6229 from removed linkonce sections, or sections discarded by 6230 a linker script. */ 6231 dodyn: 6232 if (r_symndx == 0) 6233 { 6234 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); 6235 break; 6236 } 6237 /* Fall thru. */ 6238 6239 if ((input_section->flags & SEC_ALLOC) == 0) 6240 break; 6241 /* Fall thru. */ 6242 6243 if ((info->shared 6244 && (h == NULL 6245 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 6246 || h->root.type != bfd_link_hash_undefweak) 6247 && (MUST_BE_DYN_RELOC (r_type) 6248 || !SYMBOL_CALLS_LOCAL (info, h))) 6249 || (ELIMINATE_COPY_RELOCS 6250 && !info->shared 6251 && h != NULL 6252 && h->dynindx != -1 6253 && !h->non_got_ref 6254 && h->def_dynamic 6255 && !h->def_regular)) 6256 { 6257 int skip; 6258 6259#ifdef DEBUG 6260 fprintf (stderr, "ppc_elf_relocate_section needs to " 6261 "create relocation for %s\n", 6262 (h && h->root.root.string 6263 ? h->root.root.string : "<unknown>")); 6264#endif 6265 6266 /* When generating a shared object, these relocations 6267 are copied into the output file to be resolved at run 6268 time. */ 6269 if (sreloc == NULL) 6270 { 6271 const char *name; 6272 6273 name = (bfd_elf_string_from_elf_section 6274 (input_bfd, 6275 elf_elfheader (input_bfd)->e_shstrndx, 6276 elf_section_data (input_section)->rel_hdr.sh_name)); 6277 if (name == NULL) 6278 return FALSE; 6279 6280 BFD_ASSERT (CONST_STRNEQ (name, ".rela") 6281 && strcmp (bfd_get_section_name (input_bfd, 6282 input_section), 6283 name + 5) == 0); 6284 6285 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name); 6286 BFD_ASSERT (sreloc != NULL); 6287 } 6288 6289 skip = 0; 6290 6291 outrel.r_offset = 6292 _bfd_elf_section_offset (output_bfd, info, input_section, 6293 rel->r_offset); 6294 if (outrel.r_offset == (bfd_vma) -1 6295 || outrel.r_offset == (bfd_vma) -2) 6296 skip = (int) outrel.r_offset; 6297 outrel.r_offset += (input_section->output_section->vma 6298 + input_section->output_offset); 6299 6300 if (skip) 6301 memset (&outrel, 0, sizeof outrel); 6302 else if (!SYMBOL_REFERENCES_LOCAL (info, h)) 6303 { 6304 unresolved_reloc = FALSE; 6305 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 6306 outrel.r_addend = rel->r_addend; 6307 } 6308 else 6309 { 6310 outrel.r_addend = relocation + rel->r_addend; 6311 6312 if (r_type == R_PPC_ADDR32) 6313 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); 6314 else 6315 { 6316 long indx; 6317 6318 if (bfd_is_abs_section (sec)) 6319 indx = 0; 6320 else if (sec == NULL || sec->owner == NULL) 6321 { 6322 bfd_set_error (bfd_error_bad_value); 6323 return FALSE; 6324 } 6325 else 6326 { 6327 asection *osec; 6328 6329 /* We are turning this relocation into one 6330 against a section symbol. It would be 6331 proper to subtract the symbol's value, 6332 osec->vma, from the emitted reloc addend, 6333 but ld.so expects buggy relocs. */ 6334 osec = sec->output_section; 6335 indx = elf_section_data (osec)->dynindx; 6336 if (indx == 0) 6337 { 6338 osec = htab->elf.text_index_section; 6339 indx = elf_section_data (osec)->dynindx; 6340 } 6341 BFD_ASSERT (indx != 0); 6342#ifdef DEBUG 6343 if (indx == 0) 6344 printf ("indx=%ld section=%s flags=%08x name=%s\n", 6345 indx, osec->name, osec->flags, 6346 h->root.root.string); 6347#endif 6348 } 6349 6350 outrel.r_info = ELF32_R_INFO (indx, r_type); 6351 } 6352 } 6353 6354 loc = sreloc->contents; 6355 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 6356 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 6357 6358 if (skip == -1) 6359 continue; 6360 6361 /* This reloc will be computed at runtime. We clear the memory 6362 so that it contains predictable value. */ 6363 if (! skip 6364 && ((input_section->flags & SEC_ALLOC) != 0 6365 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE)) 6366 { 6367 relocation = howto->pc_relative ? outrel.r_offset : 0; 6368 addend = 0; 6369 break; 6370 } 6371 } 6372 break; 6373 6374 case R_PPC_RELAX32PC_PLT: 6375 case R_PPC_RELAX32_PLT: 6376 { 6377 struct plt_entry *ent = find_plt_ent (h, got2, addend); 6378 6379 if (htab->plt_type == PLT_NEW) 6380 relocation = (htab->glink->output_section->vma 6381 + htab->glink->output_offset 6382 + ent->glink_offset); 6383 else 6384 relocation = (htab->plt->output_section->vma 6385 + htab->plt->output_offset 6386 + ent->plt.offset); 6387 addend = 0; 6388 } 6389 if (r_type == R_PPC_RELAX32_PLT) 6390 goto relax32; 6391 /* Fall thru */ 6392 6393 case R_PPC_RELAX32PC: 6394 relocation -= (input_section->output_section->vma 6395 + input_section->output_offset 6396 + rel->r_offset - 4); 6397 /* Fall thru */ 6398 6399 case R_PPC_RELAX32: 6400 relax32: 6401 { 6402 unsigned long t0; 6403 unsigned long t1; 6404 6405 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset); 6406 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4); 6407 6408 /* We're clearing the bits for R_PPC_ADDR16_HA 6409 and R_PPC_ADDR16_LO here. */ 6410 t0 &= ~0xffff; 6411 t1 &= ~0xffff; 6412 6413 /* t0 is HA, t1 is LO */ 6414 relocation += addend; 6415 t0 |= ((relocation + 0x8000) >> 16) & 0xffff; 6416 t1 |= relocation & 0xffff; 6417 6418 bfd_put_32 (output_bfd, t0, contents + rel->r_offset); 6419 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4); 6420 } 6421 continue; 6422 6423 /* Indirect .sdata relocation. */ 6424 case R_PPC_EMB_SDAI16: 6425 BFD_ASSERT (htab->sdata[0].section != NULL); 6426 relocation 6427 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0], 6428 h, relocation, rel); 6429 break; 6430 6431 /* Indirect .sdata2 relocation. */ 6432 case R_PPC_EMB_SDA2I16: 6433 BFD_ASSERT (htab->sdata[1].section != NULL); 6434 relocation 6435 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1], 6436 h, relocation, rel); 6437 break; 6438 6439 /* Handle the TOC16 reloc. We want to use the offset within the .got 6440 section, not the actual VMA. This is appropriate when generating 6441 an embedded ELF object, for which the .got section acts like the 6442 AIX .toc section. */ 6443 case R_PPC_TOC16: /* phony GOT16 relocations */ 6444 BFD_ASSERT (sec != NULL); 6445 BFD_ASSERT (bfd_is_und_section (sec) 6446 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0 6447 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0); 6448 6449 addend -= sec->output_section->vma + sec->output_offset + 0x8000; 6450 break; 6451 6452 case R_PPC_PLTREL24: 6453 /* Relocation is to the entry for this symbol in the 6454 procedure linkage table. */ 6455 { 6456 struct plt_entry *ent = find_plt_ent (h, got2, addend); 6457 6458 addend = 0; 6459 if (ent == NULL 6460 || htab->plt == NULL) 6461 { 6462 /* We didn't make a PLT entry for this symbol. This 6463 happens when statically linking PIC code, or when 6464 using -Bsymbolic. */ 6465 break; 6466 } 6467 6468 unresolved_reloc = FALSE; 6469 if (htab->plt_type == PLT_NEW) 6470 relocation = (htab->glink->output_section->vma 6471 + htab->glink->output_offset 6472 + ent->glink_offset); 6473 else 6474 relocation = (htab->plt->output_section->vma 6475 + htab->plt->output_offset 6476 + ent->plt.offset); 6477 } 6478 break; 6479 6480 /* Relocate against _SDA_BASE_. */ 6481 case R_PPC_SDAREL16: 6482 { 6483 const char *name; 6484 struct elf_link_hash_entry *sh; 6485 6486 BFD_ASSERT (sec != NULL); 6487 name = bfd_get_section_name (abfd, sec->output_section); 6488 if (! ((CONST_STRNEQ (name, ".sdata") 6489 && (name[6] == 0 || name[6] == '.')) 6490 || (CONST_STRNEQ (name, ".sbss") 6491 && (name[5] == 0 || name[5] == '.')))) 6492 { 6493 (*_bfd_error_handler) 6494 (_("%B: the target (%s) of a %s relocation is " 6495 "in the wrong output section (%s)"), 6496 input_bfd, 6497 sym_name, 6498 howto->name, 6499 name); 6500 } 6501 sh = htab->sdata[0].sym; 6502 addend -= (sh->root.u.def.value 6503 + sh->root.u.def.section->output_offset 6504 + sh->root.u.def.section->output_section->vma); 6505 } 6506 break; 6507 6508 /* Relocate against _SDA2_BASE_. */ 6509 case R_PPC_EMB_SDA2REL: 6510 { 6511 const char *name; 6512 struct elf_link_hash_entry *sh; 6513 6514 BFD_ASSERT (sec != NULL); 6515 name = bfd_get_section_name (abfd, sec->output_section); 6516 if (! (CONST_STRNEQ (name, ".sdata2") 6517 || CONST_STRNEQ (name, ".sbss2"))) 6518 { 6519 (*_bfd_error_handler) 6520 (_("%B: the target (%s) of a %s relocation is " 6521 "in the wrong output section (%s)"), 6522 input_bfd, 6523 sym_name, 6524 howto->name, 6525 name); 6526 6527 bfd_set_error (bfd_error_bad_value); 6528 ret = FALSE; 6529 continue; 6530 } 6531 sh = htab->sdata[1].sym; 6532 addend -= (sh->root.u.def.value 6533 + sh->root.u.def.section->output_offset 6534 + sh->root.u.def.section->output_section->vma); 6535 } 6536 break; 6537 6538 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */ 6539 case R_PPC_EMB_SDA21: 6540 case R_PPC_EMB_RELSDA: 6541 { 6542 const char *name; 6543 int reg; 6544 struct elf_link_hash_entry *sh; 6545 6546 BFD_ASSERT (sec != NULL); 6547 name = bfd_get_section_name (abfd, sec->output_section); 6548 if (((CONST_STRNEQ (name, ".sdata") 6549 && (name[6] == 0 || name[6] == '.')) 6550 || (CONST_STRNEQ (name, ".sbss") 6551 && (name[5] == 0 || name[5] == '.')))) 6552 { 6553 reg = 13; 6554 sh = htab->sdata[0].sym; 6555 addend -= (sh->root.u.def.value 6556 + sh->root.u.def.section->output_offset 6557 + sh->root.u.def.section->output_section->vma); 6558 } 6559 6560 else if (CONST_STRNEQ (name, ".sdata2") 6561 || CONST_STRNEQ (name, ".sbss2")) 6562 { 6563 reg = 2; 6564 sh = htab->sdata[1].sym; 6565 addend -= (sh->root.u.def.value 6566 + sh->root.u.def.section->output_offset 6567 + sh->root.u.def.section->output_section->vma); 6568 } 6569 6570 else if (strcmp (name, ".PPC.EMB.sdata0") == 0 6571 || strcmp (name, ".PPC.EMB.sbss0") == 0) 6572 { 6573 reg = 0; 6574 } 6575 6576 else 6577 { 6578 (*_bfd_error_handler) 6579 (_("%B: the target (%s) of a %s relocation is " 6580 "in the wrong output section (%s)"), 6581 input_bfd, 6582 sym_name, 6583 howto->name, 6584 name); 6585 6586 bfd_set_error (bfd_error_bad_value); 6587 ret = FALSE; 6588 continue; 6589 } 6590 6591 if (r_type == R_PPC_EMB_SDA21) 6592 { /* fill in register field */ 6593 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 6594 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); 6595 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 6596 } 6597 } 6598 break; 6599 6600 /* Relocate against the beginning of the section. */ 6601 case R_PPC_SECTOFF: 6602 case R_PPC_SECTOFF_LO: 6603 case R_PPC_SECTOFF_HI: 6604 case R_PPC_SECTOFF_HA: 6605 BFD_ASSERT (sec != NULL); 6606 addend -= sec->output_section->vma; 6607 break; 6608 6609 /* Negative relocations. */ 6610 case R_PPC_EMB_NADDR32: 6611 case R_PPC_EMB_NADDR16: 6612 case R_PPC_EMB_NADDR16_LO: 6613 case R_PPC_EMB_NADDR16_HI: 6614 case R_PPC_EMB_NADDR16_HA: 6615 addend -= 2 * relocation; 6616 break; 6617 6618 case R_PPC_COPY: 6619 case R_PPC_GLOB_DAT: 6620 case R_PPC_JMP_SLOT: 6621 case R_PPC_RELATIVE: 6622 case R_PPC_PLT32: 6623 case R_PPC_PLTREL32: 6624 case R_PPC_PLT16_LO: 6625 case R_PPC_PLT16_HI: 6626 case R_PPC_PLT16_HA: 6627 case R_PPC_ADDR30: 6628 case R_PPC_EMB_RELSEC16: 6629 case R_PPC_EMB_RELST_LO: 6630 case R_PPC_EMB_RELST_HI: 6631 case R_PPC_EMB_RELST_HA: 6632 case R_PPC_EMB_BIT_FLD: 6633 (*_bfd_error_handler) 6634 (_("%B: relocation %s is not yet supported for symbol %s."), 6635 input_bfd, 6636 howto->name, 6637 sym_name); 6638 6639 bfd_set_error (bfd_error_invalid_operation); 6640 ret = FALSE; 6641 continue; 6642 } 6643 6644 /* Do any further special processing. */ 6645 switch (r_type) 6646 { 6647 default: 6648 break; 6649 6650 case R_PPC_ADDR16_HA: 6651 case R_PPC_REL16_HA: 6652 case R_PPC_SECTOFF_HA: 6653 case R_PPC_TPREL16_HA: 6654 case R_PPC_DTPREL16_HA: 6655 case R_PPC_EMB_NADDR16_HA: 6656 case R_PPC_EMB_RELST_HA: 6657 /* It's just possible that this symbol is a weak symbol 6658 that's not actually defined anywhere. In that case, 6659 'sec' would be NULL, and we should leave the symbol 6660 alone (it will be set to zero elsewhere in the link). */ 6661 if (sec == NULL) 6662 break; 6663 /* Fall thru */ 6664 6665 case R_PPC_PLT16_HA: 6666 case R_PPC_GOT16_HA: 6667 case R_PPC_GOT_TLSGD16_HA: 6668 case R_PPC_GOT_TLSLD16_HA: 6669 case R_PPC_GOT_TPREL16_HA: 6670 case R_PPC_GOT_DTPREL16_HA: 6671 /* Add 0x10000 if sign bit in 0:15 is set. 6672 Bits 0:15 are not used. */ 6673 addend += 0x8000; 6674 break; 6675 } 6676 6677#ifdef DEBUG 6678 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, " 6679 "offset = %ld, addend = %ld\n", 6680 howto->name, 6681 (int) r_type, 6682 sym_name, 6683 r_symndx, 6684 (long) rel->r_offset, 6685 (long) addend); 6686#endif 6687 6688 if (unresolved_reloc 6689 && !((input_section->flags & SEC_DEBUGGING) != 0 6690 && h->def_dynamic)) 6691 { 6692 (*_bfd_error_handler) 6693 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), 6694 input_bfd, 6695 input_section, 6696 (long) rel->r_offset, 6697 howto->name, 6698 sym_name); 6699 ret = FALSE; 6700 } 6701 6702 r = _bfd_final_link_relocate (howto, 6703 input_bfd, 6704 input_section, 6705 contents, 6706 rel->r_offset, 6707 relocation, 6708 addend); 6709 6710 if (r != bfd_reloc_ok) 6711 { 6712 if (r == bfd_reloc_overflow) 6713 { 6714 if (warned) 6715 continue; 6716 if (h != NULL 6717 && h->root.type == bfd_link_hash_undefweak 6718 && howto->pc_relative) 6719 { 6720 /* Assume this is a call protected by other code that 6721 detect the symbol is undefined. If this is the case, 6722 we can safely ignore the overflow. If not, the 6723 program is hosed anyway, and a little warning isn't 6724 going to help. */ 6725 6726 continue; 6727 } 6728 6729 if (! (*info->callbacks->reloc_overflow) (info, 6730 (h ? &h->root : NULL), 6731 sym_name, 6732 howto->name, 6733 rel->r_addend, 6734 input_bfd, 6735 input_section, 6736 rel->r_offset)) 6737 return FALSE; 6738 } 6739 else 6740 { 6741 (*_bfd_error_handler) 6742 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"), 6743 input_bfd, input_section, 6744 (long) rel->r_offset, howto->name, sym_name, (int) r); 6745 ret = FALSE; 6746 } 6747 } 6748 } 6749 6750#ifdef DEBUG 6751 fprintf (stderr, "\n"); 6752#endif 6753 6754 return ret; 6755} 6756 6757#define PPC_LO(v) ((v) & 0xffff) 6758#define PPC_HI(v) (((v) >> 16) & 0xffff) 6759#define PPC_HA(v) PPC_HI ((v) + 0x8000) 6760 6761/* Finish up dynamic symbol handling. We set the contents of various 6762 dynamic sections here. */ 6763 6764static bfd_boolean 6765ppc_elf_finish_dynamic_symbol (bfd *output_bfd, 6766 struct bfd_link_info *info, 6767 struct elf_link_hash_entry *h, 6768 Elf_Internal_Sym *sym) 6769{ 6770 struct ppc_elf_link_hash_table *htab; 6771 struct plt_entry *ent; 6772 bfd_boolean doneone; 6773 6774#ifdef DEBUG 6775 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", 6776 h->root.root.string); 6777#endif 6778 6779 htab = ppc_elf_hash_table (info); 6780 BFD_ASSERT (htab->elf.dynobj != NULL); 6781 6782 doneone = FALSE; 6783 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 6784 if (ent->plt.offset != (bfd_vma) -1) 6785 { 6786 if (!doneone) 6787 { 6788 Elf_Internal_Rela rela; 6789 bfd_byte *loc; 6790 bfd_vma reloc_index; 6791 6792 if (htab->plt_type == PLT_NEW) 6793 reloc_index = ent->plt.offset / 4; 6794 else 6795 { 6796 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size) 6797 / htab->plt_slot_size); 6798 if (reloc_index > PLT_NUM_SINGLE_ENTRIES 6799 && htab->plt_type == PLT_OLD) 6800 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; 6801 } 6802 6803 /* This symbol has an entry in the procedure linkage table. 6804 Set it up. */ 6805 if (htab->plt_type == PLT_VXWORKS) 6806 { 6807 bfd_vma got_offset; 6808 const bfd_vma *plt_entry; 6809 6810 /* The first three entries in .got.plt are reserved. */ 6811 got_offset = (reloc_index + 3) * 4; 6812 6813 /* Use the right PLT. */ 6814 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry 6815 : ppc_elf_vxworks_plt_entry; 6816 6817 /* Fill in the .plt on VxWorks. */ 6818 if (info->shared) 6819 { 6820 bfd_vma got_offset_hi = (got_offset >> 16) 6821 + ((got_offset & 0x8000) >> 15); 6822 6823 bfd_put_32 (output_bfd, 6824 plt_entry[0] | (got_offset_hi & 0xffff), 6825 htab->plt->contents + ent->plt.offset + 0); 6826 bfd_put_32 (output_bfd, 6827 plt_entry[1] | (got_offset & 0xffff), 6828 htab->plt->contents + ent->plt.offset + 4); 6829 } 6830 else 6831 { 6832 bfd_vma got_loc 6833 = (got_offset 6834 + htab->elf.hgot->root.u.def.value 6835 + htab->elf.hgot->root.u.def.section->output_offset 6836 + htab->elf.hgot->root.u.def.section->output_section->vma); 6837 bfd_vma got_loc_hi = (got_loc >> 16) 6838 + ((got_loc & 0x8000) >> 15); 6839 6840 bfd_put_32 (output_bfd, 6841 plt_entry[0] | (got_loc_hi & 0xffff), 6842 htab->plt->contents + ent->plt.offset + 0); 6843 bfd_put_32 (output_bfd, 6844 plt_entry[1] | (got_loc & 0xffff), 6845 htab->plt->contents + ent->plt.offset + 4); 6846 } 6847 6848 bfd_put_32 (output_bfd, plt_entry[2], 6849 htab->plt->contents + ent->plt.offset + 8); 6850 bfd_put_32 (output_bfd, plt_entry[3], 6851 htab->plt->contents + ent->plt.offset + 12); 6852 6853 /* This instruction is an immediate load. The value loaded is 6854 the byte offset of the R_PPC_JMP_SLOT relocation from the 6855 start of the .rela.plt section. The value is stored in the 6856 low-order 16 bits of the load instruction. */ 6857 /* NOTE: It appears that this is now an index rather than a 6858 prescaled offset. */ 6859 bfd_put_32 (output_bfd, 6860 plt_entry[4] | reloc_index, 6861 htab->plt->contents + ent->plt.offset + 16); 6862 /* This instruction is a PC-relative branch whose target is 6863 the start of the PLT section. The address of this branch 6864 instruction is 20 bytes beyond the start of this PLT entry. 6865 The address is encoded in bits 6-29, inclusive. The value 6866 stored is right-shifted by two bits, permitting a 26-bit 6867 offset. */ 6868 bfd_put_32 (output_bfd, 6869 (plt_entry[5] 6870 | (-(ent->plt.offset + 20) & 0x03fffffc)), 6871 htab->plt->contents + ent->plt.offset + 20); 6872 bfd_put_32 (output_bfd, plt_entry[6], 6873 htab->plt->contents + ent->plt.offset + 24); 6874 bfd_put_32 (output_bfd, plt_entry[7], 6875 htab->plt->contents + ent->plt.offset + 28); 6876 6877 /* Fill in the GOT entry corresponding to this PLT slot with 6878 the address immediately after the the "bctr" instruction 6879 in this PLT entry. */ 6880 bfd_put_32 (output_bfd, (htab->plt->output_section->vma 6881 + htab->plt->output_offset 6882 + ent->plt.offset + 16), 6883 htab->sgotplt->contents + got_offset); 6884 6885 if (!info->shared) 6886 { 6887 /* Fill in a couple of entries in .rela.plt.unloaded. */ 6888 loc = htab->srelplt2->contents 6889 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index 6890 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS) 6891 * sizeof (Elf32_External_Rela)); 6892 6893 /* Provide the @ha relocation for the first instruction. */ 6894 rela.r_offset = (htab->plt->output_section->vma 6895 + htab->plt->output_offset 6896 + ent->plt.offset + 2); 6897 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, 6898 R_PPC_ADDR16_HA); 6899 rela.r_addend = got_offset; 6900 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 6901 loc += sizeof (Elf32_External_Rela); 6902 6903 /* Provide the @l relocation for the second instruction. */ 6904 rela.r_offset = (htab->plt->output_section->vma 6905 + htab->plt->output_offset 6906 + ent->plt.offset + 6); 6907 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, 6908 R_PPC_ADDR16_LO); 6909 rela.r_addend = got_offset; 6910 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 6911 loc += sizeof (Elf32_External_Rela); 6912 6913 /* Provide a relocation for the GOT entry corresponding to this 6914 PLT slot. Point it at the middle of the .plt entry. */ 6915 rela.r_offset = (htab->sgotplt->output_section->vma 6916 + htab->sgotplt->output_offset 6917 + got_offset); 6918 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx, 6919 R_PPC_ADDR32); 6920 rela.r_addend = ent->plt.offset + 16; 6921 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 6922 } 6923 6924 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT. 6925 In particular, the offset for the relocation is not the 6926 address of the PLT entry for this function, as specified 6927 by the ABI. Instead, the offset is set to the address of 6928 the GOT slot for this function. See EABI 4.4.4.1. */ 6929 rela.r_offset = (htab->sgotplt->output_section->vma 6930 + htab->sgotplt->output_offset 6931 + got_offset); 6932 6933 } 6934 else 6935 { 6936 rela.r_offset = (htab->plt->output_section->vma 6937 + htab->plt->output_offset 6938 + ent->plt.offset); 6939 if (htab->plt_type == PLT_OLD) 6940 { 6941 /* We don't need to fill in the .plt. The ppc dynamic 6942 linker will fill it in. */ 6943 } 6944 else 6945 { 6946 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset 6947 + htab->glink->output_section->vma 6948 + htab->glink->output_offset); 6949 bfd_put_32 (output_bfd, val, 6950 htab->plt->contents + ent->plt.offset); 6951 } 6952 } 6953 6954 /* Fill in the entry in the .rela.plt section. */ 6955 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); 6956 rela.r_addend = 0; 6957 6958 loc = (htab->relplt->contents 6959 + reloc_index * sizeof (Elf32_External_Rela)); 6960 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 6961 6962 if (!h->def_regular) 6963 { 6964 /* Mark the symbol as undefined, rather than as defined in 6965 the .plt section. Leave the value alone. */ 6966 sym->st_shndx = SHN_UNDEF; 6967 /* If the symbol is weak, we do need to clear the value. 6968 Otherwise, the PLT entry would provide a definition for 6969 the symbol even if the symbol wasn't defined anywhere, 6970 and so the symbol would never be NULL. */ 6971 if (!h->ref_regular_nonweak) 6972 sym->st_value = 0; 6973 } 6974 doneone = TRUE; 6975 } 6976 6977 if (htab->plt_type == PLT_NEW) 6978 { 6979 bfd_vma plt; 6980 unsigned char *p; 6981 6982 plt = (ent->plt.offset 6983 + htab->plt->output_section->vma 6984 + htab->plt->output_offset); 6985 p = (unsigned char *) htab->glink->contents + ent->glink_offset; 6986 6987 if (info->shared || info->pie) 6988 { 6989 bfd_vma got = 0; 6990 6991 if (ent->addend >= 32768) 6992 got = (ent->addend 6993 + ent->sec->output_section->vma 6994 + ent->sec->output_offset); 6995 else if (htab->elf.hgot != NULL) 6996 got = (htab->elf.hgot->root.u.def.value 6997 + htab->elf.hgot->root.u.def.section->output_section->vma 6998 + htab->elf.hgot->root.u.def.section->output_offset); 6999 7000 plt -= got; 7001 7002 if (plt + 0x8000 < 0x10000) 7003 { 7004 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p); 7005 p += 4; 7006 bfd_put_32 (output_bfd, MTCTR_11, p); 7007 p += 4; 7008 bfd_put_32 (output_bfd, BCTR, p); 7009 p += 4; 7010 bfd_put_32 (output_bfd, NOP, p); 7011 p += 4; 7012 } 7013 else 7014 { 7015 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p); 7016 p += 4; 7017 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); 7018 p += 4; 7019 bfd_put_32 (output_bfd, MTCTR_11, p); 7020 p += 4; 7021 bfd_put_32 (output_bfd, BCTR, p); 7022 p += 4; 7023 } 7024 } 7025 else 7026 { 7027 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p); 7028 p += 4; 7029 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); 7030 p += 4; 7031 bfd_put_32 (output_bfd, MTCTR_11, p); 7032 p += 4; 7033 bfd_put_32 (output_bfd, BCTR, p); 7034 p += 4; 7035 7036 /* We only need one non-PIC glink stub. */ 7037 break; 7038 } 7039 } 7040 else 7041 break; 7042 } 7043 7044 if (h->needs_copy) 7045 { 7046 asection *s; 7047 Elf_Internal_Rela rela; 7048 bfd_byte *loc; 7049 7050 /* This symbols needs a copy reloc. Set it up. */ 7051 7052#ifdef DEBUG 7053 fprintf (stderr, ", copy"); 7054#endif 7055 7056 BFD_ASSERT (h->dynindx != -1); 7057 7058 if (ppc_elf_hash_entry (h)->has_sda_refs) 7059 s = htab->relsbss; 7060 else 7061 s = htab->relbss; 7062 BFD_ASSERT (s != NULL); 7063 7064 rela.r_offset = (h->root.u.def.value 7065 + h->root.u.def.section->output_section->vma 7066 + h->root.u.def.section->output_offset); 7067 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); 7068 rela.r_addend = 0; 7069 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 7070 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 7071 } 7072 7073#ifdef DEBUG 7074 fprintf (stderr, "\n"); 7075#endif 7076 7077 /* Mark some specially defined symbols as absolute. */ 7078 if (strcmp (h->root.root.string, "_DYNAMIC") == 0 7079 || (!htab->is_vxworks 7080 && (h == htab->elf.hgot 7081 || strcmp (h->root.root.string, 7082 "_PROCEDURE_LINKAGE_TABLE_") == 0))) 7083 sym->st_shndx = SHN_ABS; 7084 7085 return TRUE; 7086} 7087 7088static enum elf_reloc_type_class 7089ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela) 7090{ 7091 switch (ELF32_R_TYPE (rela->r_info)) 7092 { 7093 case R_PPC_RELATIVE: 7094 return reloc_class_relative; 7095 case R_PPC_REL24: 7096 case R_PPC_ADDR24: 7097 case R_PPC_JMP_SLOT: 7098 return reloc_class_plt; 7099 case R_PPC_COPY: 7100 return reloc_class_copy; 7101 default: 7102 return reloc_class_normal; 7103 } 7104} 7105 7106/* Finish up the dynamic sections. */ 7107 7108static bfd_boolean 7109ppc_elf_finish_dynamic_sections (bfd *output_bfd, 7110 struct bfd_link_info *info) 7111{ 7112 asection *sdyn; 7113 asection *splt; 7114 struct ppc_elf_link_hash_table *htab; 7115 bfd_vma got; 7116 bfd * dynobj; 7117 7118#ifdef DEBUG 7119 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); 7120#endif 7121 7122 htab = ppc_elf_hash_table (info); 7123 dynobj = elf_hash_table (info)->dynobj; 7124 sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); 7125 if (htab->is_vxworks) 7126 splt = bfd_get_section_by_name (dynobj, ".plt"); 7127 else 7128 splt = NULL; 7129 7130 got = 0; 7131 if (htab->elf.hgot != NULL) 7132 got = (htab->elf.hgot->root.u.def.value 7133 + htab->elf.hgot->root.u.def.section->output_section->vma 7134 + htab->elf.hgot->root.u.def.section->output_offset); 7135 7136 if (htab->elf.dynamic_sections_created) 7137 { 7138 Elf32_External_Dyn *dyncon, *dynconend; 7139 7140 BFD_ASSERT (htab->plt != NULL && sdyn != NULL); 7141 7142 dyncon = (Elf32_External_Dyn *) sdyn->contents; 7143 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 7144 for (; dyncon < dynconend; dyncon++) 7145 { 7146 Elf_Internal_Dyn dyn; 7147 asection *s; 7148 7149 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 7150 7151 switch (dyn.d_tag) 7152 { 7153 case DT_PLTGOT: 7154 if (htab->is_vxworks) 7155 s = htab->sgotplt; 7156 else 7157 s = htab->plt; 7158 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 7159 break; 7160 7161 case DT_PLTRELSZ: 7162 dyn.d_un.d_val = htab->relplt->size; 7163 break; 7164 7165 case DT_JMPREL: 7166 s = htab->relplt; 7167 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 7168 break; 7169 7170 case DT_PPC_GOT: 7171 dyn.d_un.d_ptr = got; 7172 break; 7173 7174 case DT_RELASZ: 7175 if (htab->is_vxworks) 7176 { 7177 if (htab->relplt) 7178 dyn.d_un.d_ptr -= htab->relplt->size; 7179 break; 7180 } 7181 continue; 7182 7183 default: 7184 continue; 7185 } 7186 7187 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 7188 } 7189 } 7190 7191 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can 7192 easily find the address of the _GLOBAL_OFFSET_TABLE_. */ 7193 if (htab->got != NULL) 7194 { 7195 unsigned char *p = htab->got->contents; 7196 bfd_vma val; 7197 7198 p += htab->elf.hgot->root.u.def.value; 7199 if (htab->plt_type == PLT_OLD) 7200 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4); 7201 7202 val = 0; 7203 if (sdyn != NULL) 7204 val = sdyn->output_section->vma + sdyn->output_offset; 7205 bfd_put_32 (output_bfd, val, p); 7206 7207 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4; 7208 } 7209 7210 /* Fill in the first entry in the VxWorks procedure linkage table. */ 7211 if (splt && splt->size > 0) 7212 { 7213 /* Use the right PLT. */ 7214 static const bfd_vma *plt_entry = NULL; 7215 plt_entry = info->shared ? 7216 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry; 7217 7218 if (!info->shared) 7219 { 7220 bfd_vma got_value = 7221 (htab->elf.hgot->root.u.def.section->output_section->vma 7222 + htab->elf.hgot->root.u.def.section->output_offset 7223 + htab->elf.hgot->root.u.def.value); 7224 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15); 7225 7226 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff), 7227 splt->contents + 0); 7228 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff), 7229 splt->contents + 4); 7230 } 7231 else 7232 { 7233 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0); 7234 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4); 7235 } 7236 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8); 7237 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12); 7238 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16); 7239 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20); 7240 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24); 7241 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28); 7242 7243 if (! info->shared) 7244 { 7245 Elf_Internal_Rela rela; 7246 bfd_byte *loc; 7247 7248 loc = htab->srelplt2->contents; 7249 7250 /* Output the @ha relocation for the first instruction. */ 7251 rela.r_offset = (htab->plt->output_section->vma 7252 + htab->plt->output_offset 7253 + 2); 7254 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); 7255 rela.r_addend = 0; 7256 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 7257 loc += sizeof (Elf32_External_Rela); 7258 7259 /* Output the @l relocation for the second instruction. */ 7260 rela.r_offset = (htab->plt->output_section->vma 7261 + htab->plt->output_offset 7262 + 6); 7263 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); 7264 rela.r_addend = 0; 7265 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 7266 loc += sizeof (Elf32_External_Rela); 7267 7268 /* Fix up the remaining relocations. They may have the wrong 7269 symbol index for _G_O_T_ or _P_L_T_ depending on the order 7270 in which symbols were output. */ 7271 while (loc < htab->srelplt2->contents + htab->srelplt2->size) 7272 { 7273 Elf_Internal_Rela rel; 7274 7275 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 7276 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); 7277 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 7278 loc += sizeof (Elf32_External_Rela); 7279 7280 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 7281 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); 7282 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 7283 loc += sizeof (Elf32_External_Rela); 7284 7285 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 7286 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32); 7287 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 7288 loc += sizeof (Elf32_External_Rela); 7289 } 7290 } 7291 } 7292 7293 if (htab->glink != NULL && htab->glink->contents != NULL) 7294 { 7295 unsigned char *p; 7296 unsigned char *endp; 7297 bfd_vma res0; 7298 unsigned int i; 7299 7300 /* 7301 * PIC glink code is the following: 7302 * 7303 * # ith PLT code stub. 7304 * addis 11,30,(plt+(i-1)*4-got)@ha 7305 * lwz 11,(plt+(i-1)*4-got)@l(11) 7306 * mtctr 11 7307 * bctr 7308 * 7309 * # A table of branches, one for each plt entry. 7310 * # The idea is that the plt call stub loads ctr (and r11) with these 7311 * # addresses, so (r11 - res_0) gives the plt index * 4. 7312 * res_0: b PLTresolve 7313 * res_1: b PLTresolve 7314 * . 7315 * # Some number of entries towards the end can be nops 7316 * res_n_m3: nop 7317 * res_n_m2: nop 7318 * res_n_m1: 7319 * 7320 * PLTresolve: 7321 * addis 11,11,(1f-res_0)@ha 7322 * mflr 0 7323 * bcl 20,31,1f 7324 * 1: addi 11,11,(1b-res_0)@l 7325 * mflr 12 7326 * mtlr 0 7327 * sub 11,11,12 # r11 = index * 4 7328 * addis 12,12,(got+4-1b)@ha 7329 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve 7330 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address 7331 * mtctr 0 7332 * add 0,11,11 7333 * add 11,0,11 # r11 = index * 12 = reloc offset. 7334 * bctr 7335 */ 7336 static const unsigned int pic_plt_resolve[] = 7337 { 7338 ADDIS_11_11, 7339 MFLR_0, 7340 BCL_20_31, 7341 ADDI_11_11, 7342 MFLR_12, 7343 MTLR_0, 7344 SUB_11_11_12, 7345 ADDIS_12_12, 7346 LWZ_0_12, 7347 LWZ_12_12, 7348 MTCTR_0, 7349 ADD_0_11_11, 7350 ADD_11_0_11, 7351 BCTR, 7352 NOP, 7353 NOP 7354 }; 7355 7356 static const unsigned int plt_resolve[] = 7357 { 7358 LIS_12, 7359 ADDIS_11_11, 7360 LWZ_0_12, 7361 ADDI_11_11, 7362 MTCTR_0, 7363 ADD_0_11_11, 7364 LWZ_12_12, 7365 ADD_11_0_11, 7366 BCTR, 7367 NOP, 7368 NOP, 7369 NOP, 7370 NOP, 7371 NOP, 7372 NOP, 7373 NOP 7374 }; 7375 7376 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4) 7377 abort (); 7378 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4) 7379 abort (); 7380 7381 /* Build the branch table, one for each plt entry (less one), 7382 and perhaps some padding. */ 7383 p = htab->glink->contents; 7384 p += htab->glink_pltresolve; 7385 endp = htab->glink->contents; 7386 endp += htab->glink->size - GLINK_PLTRESOLVE; 7387 while (p < endp - 8 * 4) 7388 { 7389 bfd_put_32 (output_bfd, B + endp - p, p); 7390 p += 4; 7391 } 7392 while (p < endp) 7393 { 7394 bfd_put_32 (output_bfd, NOP, p); 7395 p += 4; 7396 } 7397 7398 res0 = (htab->glink_pltresolve 7399 + htab->glink->output_section->vma 7400 + htab->glink->output_offset); 7401 7402 /* Last comes the PLTresolve stub. */ 7403 if (info->shared || info->pie) 7404 { 7405 bfd_vma bcl; 7406 7407 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++) 7408 { 7409 bfd_put_32 (output_bfd, pic_plt_resolve[i], p); 7410 p += 4; 7411 } 7412 p -= 4 * ARRAY_SIZE (pic_plt_resolve); 7413 7414 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4 7415 + htab->glink->output_section->vma 7416 + htab->glink->output_offset); 7417 7418 bfd_put_32 (output_bfd, 7419 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4); 7420 bfd_put_32 (output_bfd, 7421 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4); 7422 bfd_put_32 (output_bfd, 7423 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4); 7424 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl)) 7425 { 7426 bfd_put_32 (output_bfd, 7427 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); 7428 bfd_put_32 (output_bfd, 7429 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4); 7430 } 7431 else 7432 { 7433 bfd_put_32 (output_bfd, 7434 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); 7435 bfd_put_32 (output_bfd, 7436 LWZ_12_12 + 4, p + 9*4); 7437 } 7438 } 7439 else 7440 { 7441 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++) 7442 { 7443 bfd_put_32 (output_bfd, plt_resolve[i], p); 7444 p += 4; 7445 } 7446 p -= 4 * ARRAY_SIZE (plt_resolve); 7447 7448 bfd_put_32 (output_bfd, 7449 LIS_12 + PPC_HA (got + 4), p + 0*4); 7450 bfd_put_32 (output_bfd, 7451 ADDIS_11_11 + PPC_HA (-res0), p + 1*4); 7452 bfd_put_32 (output_bfd, 7453 ADDI_11_11 + PPC_LO (-res0), p + 3*4); 7454 if (PPC_HA (got + 4) == PPC_HA (got + 8)) 7455 { 7456 bfd_put_32 (output_bfd, 7457 LWZ_0_12 + PPC_LO (got + 4), p + 2*4); 7458 bfd_put_32 (output_bfd, 7459 LWZ_12_12 + PPC_LO (got + 8), p + 6*4); 7460 } 7461 else 7462 { 7463 bfd_put_32 (output_bfd, 7464 LWZU_0_12 + PPC_LO (got + 4), p + 2*4); 7465 bfd_put_32 (output_bfd, 7466 LWZ_12_12 + 4, p + 6*4); 7467 } 7468 } 7469 } 7470 7471 return TRUE; 7472} 7473 7474#define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec 7475#define TARGET_LITTLE_NAME "elf32-powerpcle" 7476#define TARGET_BIG_SYM bfd_elf32_powerpc_vec 7477#define TARGET_BIG_NAME "elf32-powerpc" 7478#define ELF_ARCH bfd_arch_powerpc 7479#define ELF_MACHINE_CODE EM_PPC 7480#ifdef __QNXTARGET__ 7481#define ELF_MAXPAGESIZE 0x1000 7482#else 7483#define ELF_MAXPAGESIZE 0x10000 7484#endif 7485#define ELF_MINPAGESIZE 0x1000 7486#define ELF_COMMONPAGESIZE 0x1000 7487#define elf_info_to_howto ppc_elf_info_to_howto 7488 7489#ifdef EM_CYGNUS_POWERPC 7490#define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC 7491#endif 7492 7493#ifdef EM_PPC_OLD 7494#define ELF_MACHINE_ALT2 EM_PPC_OLD 7495#endif 7496 7497#define elf_backend_plt_not_loaded 1 7498#define elf_backend_can_gc_sections 1 7499#define elf_backend_can_refcount 1 7500#define elf_backend_rela_normal 1 7501 7502#define bfd_elf32_mkobject ppc_elf_mkobject 7503#define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data 7504#define bfd_elf32_bfd_relax_section ppc_elf_relax_section 7505#define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup 7506#define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags 7507#define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create 7508 7509#define elf_backend_object_p ppc_elf_object_p 7510#define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook 7511#define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook 7512#define elf_backend_section_from_shdr ppc_elf_section_from_shdr 7513#define elf_backend_relocate_section ppc_elf_relocate_section 7514#define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections 7515#define elf_backend_check_relocs ppc_elf_check_relocs 7516#define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol 7517#define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol 7518#define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook 7519#define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections 7520#define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol 7521#define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections 7522#define elf_backend_fake_sections ppc_elf_fake_sections 7523#define elf_backend_additional_program_headers ppc_elf_additional_program_headers 7524#define elf_backend_grok_prstatus ppc_elf_grok_prstatus 7525#define elf_backend_grok_psinfo ppc_elf_grok_psinfo 7526#define elf_backend_write_core_note ppc_elf_write_core_note 7527#define elf_backend_reloc_type_class ppc_elf_reloc_type_class 7528#define elf_backend_begin_write_processing ppc_elf_begin_write_processing 7529#define elf_backend_final_write_processing ppc_elf_final_write_processing 7530#define elf_backend_write_section ppc_elf_write_section 7531#define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr 7532#define elf_backend_plt_sym_val ppc_elf_plt_sym_val 7533#define elf_backend_action_discarded ppc_elf_action_discarded 7534#define elf_backend_init_index_section _bfd_elf_init_1_index_section 7535 7536#include "elf32-target.h" 7537 7538/* VxWorks Target */ 7539 7540#undef TARGET_LITTLE_SYM 7541#undef TARGET_LITTLE_NAME 7542 7543#undef TARGET_BIG_SYM 7544#define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec 7545#undef TARGET_BIG_NAME 7546#define TARGET_BIG_NAME "elf32-powerpc-vxworks" 7547 7548/* VxWorks uses the elf default section flags for .plt. */ 7549static const struct bfd_elf_special_section * 7550ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) 7551{ 7552 if (sec->name == NULL) 7553 return NULL; 7554 7555 if (strcmp (sec->name, ".plt") == 0) 7556 return _bfd_elf_get_sec_type_attr (abfd, sec); 7557 7558 return ppc_elf_get_sec_type_attr (abfd, sec); 7559} 7560 7561/* Like ppc_elf_link_hash_table_create, but overrides 7562 appropriately for VxWorks. */ 7563static struct bfd_link_hash_table * 7564ppc_elf_vxworks_link_hash_table_create (bfd *abfd) 7565{ 7566 struct bfd_link_hash_table *ret; 7567 7568 ret = ppc_elf_link_hash_table_create (abfd); 7569 if (ret) 7570 { 7571 struct ppc_elf_link_hash_table *htab 7572 = (struct ppc_elf_link_hash_table *)ret; 7573 htab->is_vxworks = 1; 7574 htab->plt_type = PLT_VXWORKS; 7575 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE; 7576 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE; 7577 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE; 7578 } 7579 return ret; 7580} 7581 7582/* Tweak magic VxWorks symbols as they are loaded. */ 7583static bfd_boolean 7584ppc_elf_vxworks_add_symbol_hook (bfd *abfd, 7585 struct bfd_link_info *info, 7586 Elf_Internal_Sym *sym, 7587 const char **namep ATTRIBUTE_UNUSED, 7588 flagword *flagsp ATTRIBUTE_UNUSED, 7589 asection **secp, 7590 bfd_vma *valp) 7591{ 7592 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, 7593 valp)) 7594 return FALSE; 7595 7596 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp); 7597} 7598 7599static void 7600ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) 7601{ 7602 ppc_elf_final_write_processing(abfd, linker); 7603 elf_vxworks_final_write_processing(abfd, linker); 7604} 7605 7606/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so 7607 define it. */ 7608#undef elf_backend_want_plt_sym 7609#define elf_backend_want_plt_sym 1 7610#undef elf_backend_want_got_plt 7611#define elf_backend_want_got_plt 1 7612#undef elf_backend_got_symbol_offset 7613#define elf_backend_got_symbol_offset 0 7614#undef elf_backend_plt_not_loaded 7615#define elf_backend_plt_not_loaded 0 7616#undef elf_backend_plt_readonly 7617#define elf_backend_plt_readonly 1 7618#undef elf_backend_got_header_size 7619#define elf_backend_got_header_size 12 7620 7621#undef bfd_elf32_bfd_link_hash_table_create 7622#define bfd_elf32_bfd_link_hash_table_create \ 7623 ppc_elf_vxworks_link_hash_table_create 7624#undef elf_backend_add_symbol_hook 7625#define elf_backend_add_symbol_hook \ 7626 ppc_elf_vxworks_add_symbol_hook 7627#undef elf_backend_link_output_symbol_hook 7628#define elf_backend_link_output_symbol_hook \ 7629 elf_vxworks_link_output_symbol_hook 7630#undef elf_backend_final_write_processing 7631#define elf_backend_final_write_processing \ 7632 ppc_elf_vxworks_final_write_processing 7633#undef elf_backend_get_sec_type_attr 7634#define elf_backend_get_sec_type_attr \ 7635 ppc_elf_vxworks_get_sec_type_attr 7636#undef elf_backend_emit_relocs 7637#define elf_backend_emit_relocs \ 7638 elf_vxworks_emit_relocs 7639 7640#undef elf32_bed 7641#define elf32_bed ppc_elf_vxworks_bed 7642 7643#include "elf32-target.h" 7644