1/* PowerPC-specific support for 32-bit ELF 2 Copyright (C) 1994-2017 Free Software Foundation, Inc. 3 Written by Ian Lance Taylor, Cygnus Support. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the 19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, 20 Boston, MA 02110-1301, USA. */ 21 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 "sysdep.h" 29#include <stdarg.h> 30#include "bfd.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#include "dwarf2.h" 38#include "opcode/ppc.h" 39 40typedef enum split16_format_type 41{ 42 split16a_type = 0, 43 split16d_type 44} 45split16_format_type; 46 47/* RELA relocations are used here. */ 48 49static bfd_reloc_status_type ppc_elf_addr16_ha_reloc 50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 51static bfd_reloc_status_type ppc_elf_unhandled_reloc 52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 53 54/* Branch prediction bit for branch taken relocs. */ 55#define BRANCH_PREDICT_BIT 0x200000 56/* Mask to set RA in memory instructions. */ 57#define RA_REGISTER_MASK 0x001f0000 58/* Value to shift register by to insert RA. */ 59#define RA_REGISTER_SHIFT 16 60 61/* The name of the dynamic interpreter. This is put in the .interp 62 section. */ 63#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 64 65/* For old-style PLT. */ 66/* The number of single-slot PLT entries (the rest use two slots). */ 67#define PLT_NUM_SINGLE_ENTRIES 8192 68 69/* For new-style .glink and .plt. */ 70#define GLINK_PLTRESOLVE 16*4 71#define GLINK_ENTRY_SIZE 4*4 72#define TLS_GET_ADDR_GLINK_SIZE 12*4 73 74/* VxWorks uses its own plt layout, filled in by the static linker. */ 75 76/* The standard VxWorks PLT entry. */ 77#define VXWORKS_PLT_ENTRY_SIZE 32 78static const bfd_vma ppc_elf_vxworks_plt_entry 79 [VXWORKS_PLT_ENTRY_SIZE / 4] = 80 { 81 0x3d800000, /* lis r12,0 */ 82 0x818c0000, /* lwz r12,0(r12) */ 83 0x7d8903a6, /* mtctr r12 */ 84 0x4e800420, /* bctr */ 85 0x39600000, /* li r11,0 */ 86 0x48000000, /* b 14 <.PLT0resolve+0x4> */ 87 0x60000000, /* nop */ 88 0x60000000, /* nop */ 89 }; 90static const bfd_vma ppc_elf_vxworks_pic_plt_entry 91 [VXWORKS_PLT_ENTRY_SIZE / 4] = 92 { 93 0x3d9e0000, /* addis r12,r30,0 */ 94 0x818c0000, /* lwz r12,0(r12) */ 95 0x7d8903a6, /* mtctr r12 */ 96 0x4e800420, /* bctr */ 97 0x39600000, /* li r11,0 */ 98 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */ 99 0x60000000, /* nop */ 100 0x60000000, /* nop */ 101 }; 102 103/* The initial VxWorks PLT entry. */ 104#define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32 105static const bfd_vma ppc_elf_vxworks_plt0_entry 106 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = 107 { 108 0x3d800000, /* lis r12,0 */ 109 0x398c0000, /* addi r12,r12,0 */ 110 0x800c0008, /* lwz r0,8(r12) */ 111 0x7c0903a6, /* mtctr r0 */ 112 0x818c0004, /* lwz r12,4(r12) */ 113 0x4e800420, /* bctr */ 114 0x60000000, /* nop */ 115 0x60000000, /* nop */ 116 }; 117static const bfd_vma ppc_elf_vxworks_pic_plt0_entry 118 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = 119 { 120 0x819e0008, /* lwz r12,8(r30) */ 121 0x7d8903a6, /* mtctr r12 */ 122 0x819e0004, /* lwz r12,4(r30) */ 123 0x4e800420, /* bctr */ 124 0x60000000, /* nop */ 125 0x60000000, /* nop */ 126 0x60000000, /* nop */ 127 0x60000000, /* nop */ 128 }; 129 130/* For executables, we have some additional relocations in 131 .rela.plt.unloaded, for the kernel loader. */ 132 133/* The number of non-JMP_SLOT relocations per PLT0 slot. */ 134#define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3 135/* The number of relocations in the PLTResolve slot. */ 136#define VXWORKS_PLTRESOLVE_RELOCS 2 137/* The number of relocations in the PLTResolve slot when when creating 138 a shared library. */ 139#define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0 140 141/* Some instructions. */ 142#define ADDIS_11_11 0x3d6b0000 143#define ADDIS_11_30 0x3d7e0000 144#define ADDIS_12_12 0x3d8c0000 145#define ADDI_11_11 0x396b0000 146#define ADD_0_11_11 0x7c0b5a14 147#define ADD_3_12_2 0x7c6c1214 148#define ADD_11_0_11 0x7d605a14 149#define B 0x48000000 150#define BA 0x48000002 151#define BCL_20_31 0x429f0005 152#define BCTR 0x4e800420 153#define BEQLR 0x4d820020 154#define CMPWI_11_0 0x2c0b0000 155#define LIS_11 0x3d600000 156#define LIS_12 0x3d800000 157#define LWZU_0_12 0x840c0000 158#define LWZ_0_12 0x800c0000 159#define LWZ_11_3 0x81630000 160#define LWZ_11_11 0x816b0000 161#define LWZ_11_30 0x817e0000 162#define LWZ_12_3 0x81830000 163#define LWZ_12_12 0x818c0000 164#define MR_0_3 0x7c601b78 165#define MR_3_0 0x7c030378 166#define MFLR_0 0x7c0802a6 167#define MFLR_12 0x7d8802a6 168#define MTCTR_0 0x7c0903a6 169#define MTCTR_11 0x7d6903a6 170#define MTLR_0 0x7c0803a6 171#define NOP 0x60000000 172#define SUB_11_11_12 0x7d6c5850 173 174/* Offset of tp and dtp pointers from start of TLS block. */ 175#define TP_OFFSET 0x7000 176#define DTP_OFFSET 0x8000 177 178/* The value of a defined global symbol. */ 179#define SYM_VAL(SYM) \ 180 ((SYM)->root.u.def.section->output_section->vma \ 181 + (SYM)->root.u.def.section->output_offset \ 182 + (SYM)->root.u.def.value) 183 184static reloc_howto_type *ppc_elf_howto_table[R_PPC_max]; 185 186static reloc_howto_type ppc_elf_howto_raw[] = { 187 /* This reloc does nothing. */ 188 HOWTO (R_PPC_NONE, /* type */ 189 0, /* rightshift */ 190 3, /* size (0 = byte, 1 = short, 2 = long) */ 191 0, /* bitsize */ 192 FALSE, /* pc_relative */ 193 0, /* bitpos */ 194 complain_overflow_dont, /* complain_on_overflow */ 195 bfd_elf_generic_reloc, /* special_function */ 196 "R_PPC_NONE", /* name */ 197 FALSE, /* partial_inplace */ 198 0, /* src_mask */ 199 0, /* dst_mask */ 200 FALSE), /* pcrel_offset */ 201 202 /* A standard 32 bit relocation. */ 203 HOWTO (R_PPC_ADDR32, /* type */ 204 0, /* rightshift */ 205 2, /* size (0 = byte, 1 = short, 2 = long) */ 206 32, /* bitsize */ 207 FALSE, /* pc_relative */ 208 0, /* bitpos */ 209 complain_overflow_dont, /* complain_on_overflow */ 210 bfd_elf_generic_reloc, /* special_function */ 211 "R_PPC_ADDR32", /* name */ 212 FALSE, /* partial_inplace */ 213 0, /* src_mask */ 214 0xffffffff, /* dst_mask */ 215 FALSE), /* pcrel_offset */ 216 217 /* An absolute 26 bit branch; the lower two bits must be zero. 218 FIXME: we don't check that, we just clear them. */ 219 HOWTO (R_PPC_ADDR24, /* type */ 220 0, /* rightshift */ 221 2, /* size (0 = byte, 1 = short, 2 = long) */ 222 26, /* bitsize */ 223 FALSE, /* pc_relative */ 224 0, /* bitpos */ 225 complain_overflow_signed, /* complain_on_overflow */ 226 bfd_elf_generic_reloc, /* special_function */ 227 "R_PPC_ADDR24", /* name */ 228 FALSE, /* partial_inplace */ 229 0, /* src_mask */ 230 0x3fffffc, /* dst_mask */ 231 FALSE), /* pcrel_offset */ 232 233 /* A standard 16 bit relocation. */ 234 HOWTO (R_PPC_ADDR16, /* type */ 235 0, /* rightshift */ 236 1, /* size (0 = byte, 1 = short, 2 = long) */ 237 16, /* bitsize */ 238 FALSE, /* pc_relative */ 239 0, /* bitpos */ 240 complain_overflow_bitfield, /* complain_on_overflow */ 241 bfd_elf_generic_reloc, /* special_function */ 242 "R_PPC_ADDR16", /* name */ 243 FALSE, /* partial_inplace */ 244 0, /* src_mask */ 245 0xffff, /* dst_mask */ 246 FALSE), /* pcrel_offset */ 247 248 /* A 16 bit relocation without overflow. */ 249 HOWTO (R_PPC_ADDR16_LO, /* type */ 250 0, /* rightshift */ 251 1, /* size (0 = byte, 1 = short, 2 = long) */ 252 16, /* bitsize */ 253 FALSE, /* pc_relative */ 254 0, /* bitpos */ 255 complain_overflow_dont,/* complain_on_overflow */ 256 bfd_elf_generic_reloc, /* special_function */ 257 "R_PPC_ADDR16_LO", /* name */ 258 FALSE, /* partial_inplace */ 259 0, /* src_mask */ 260 0xffff, /* dst_mask */ 261 FALSE), /* pcrel_offset */ 262 263 /* The high order 16 bits of an address. */ 264 HOWTO (R_PPC_ADDR16_HI, /* type */ 265 16, /* rightshift */ 266 1, /* size (0 = byte, 1 = short, 2 = long) */ 267 16, /* bitsize */ 268 FALSE, /* pc_relative */ 269 0, /* bitpos */ 270 complain_overflow_dont, /* complain_on_overflow */ 271 bfd_elf_generic_reloc, /* special_function */ 272 "R_PPC_ADDR16_HI", /* name */ 273 FALSE, /* partial_inplace */ 274 0, /* src_mask */ 275 0xffff, /* dst_mask */ 276 FALSE), /* pcrel_offset */ 277 278 /* The high order 16 bits of an address, plus 1 if the contents of 279 the low 16 bits, treated as a signed number, is negative. */ 280 HOWTO (R_PPC_ADDR16_HA, /* type */ 281 16, /* rightshift */ 282 1, /* size (0 = byte, 1 = short, 2 = long) */ 283 16, /* bitsize */ 284 FALSE, /* pc_relative */ 285 0, /* bitpos */ 286 complain_overflow_dont, /* complain_on_overflow */ 287 ppc_elf_addr16_ha_reloc, /* special_function */ 288 "R_PPC_ADDR16_HA", /* name */ 289 FALSE, /* partial_inplace */ 290 0, /* src_mask */ 291 0xffff, /* dst_mask */ 292 FALSE), /* pcrel_offset */ 293 294 /* An absolute 16 bit branch; the lower two bits must be zero. 295 FIXME: we don't check that, we just clear them. */ 296 HOWTO (R_PPC_ADDR14, /* type */ 297 0, /* rightshift */ 298 2, /* size (0 = byte, 1 = short, 2 = long) */ 299 16, /* bitsize */ 300 FALSE, /* pc_relative */ 301 0, /* bitpos */ 302 complain_overflow_signed, /* complain_on_overflow */ 303 bfd_elf_generic_reloc, /* special_function */ 304 "R_PPC_ADDR14", /* name */ 305 FALSE, /* partial_inplace */ 306 0, /* src_mask */ 307 0xfffc, /* dst_mask */ 308 FALSE), /* pcrel_offset */ 309 310 /* An absolute 16 bit branch, for which bit 10 should be set to 311 indicate that the branch is expected to be taken. The lower two 312 bits must be zero. */ 313 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */ 314 0, /* rightshift */ 315 2, /* size (0 = byte, 1 = short, 2 = long) */ 316 16, /* bitsize */ 317 FALSE, /* pc_relative */ 318 0, /* bitpos */ 319 complain_overflow_signed, /* complain_on_overflow */ 320 bfd_elf_generic_reloc, /* special_function */ 321 "R_PPC_ADDR14_BRTAKEN",/* name */ 322 FALSE, /* partial_inplace */ 323 0, /* src_mask */ 324 0xfffc, /* dst_mask */ 325 FALSE), /* pcrel_offset */ 326 327 /* An absolute 16 bit branch, for which bit 10 should be set to 328 indicate that the branch is not expected to be taken. The lower 329 two bits must be zero. */ 330 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */ 331 0, /* rightshift */ 332 2, /* size (0 = byte, 1 = short, 2 = long) */ 333 16, /* bitsize */ 334 FALSE, /* pc_relative */ 335 0, /* bitpos */ 336 complain_overflow_signed, /* complain_on_overflow */ 337 bfd_elf_generic_reloc, /* special_function */ 338 "R_PPC_ADDR14_BRNTAKEN",/* name */ 339 FALSE, /* partial_inplace */ 340 0, /* src_mask */ 341 0xfffc, /* dst_mask */ 342 FALSE), /* pcrel_offset */ 343 344 /* A relative 26 bit branch; the lower two bits must be zero. */ 345 HOWTO (R_PPC_REL24, /* type */ 346 0, /* rightshift */ 347 2, /* size (0 = byte, 1 = short, 2 = long) */ 348 26, /* bitsize */ 349 TRUE, /* pc_relative */ 350 0, /* bitpos */ 351 complain_overflow_signed, /* complain_on_overflow */ 352 bfd_elf_generic_reloc, /* special_function */ 353 "R_PPC_REL24", /* name */ 354 FALSE, /* partial_inplace */ 355 0, /* src_mask */ 356 0x3fffffc, /* dst_mask */ 357 TRUE), /* pcrel_offset */ 358 359 /* A relative 16 bit branch; the lower two bits must be zero. */ 360 HOWTO (R_PPC_REL14, /* type */ 361 0, /* rightshift */ 362 2, /* size (0 = byte, 1 = short, 2 = long) */ 363 16, /* bitsize */ 364 TRUE, /* pc_relative */ 365 0, /* bitpos */ 366 complain_overflow_signed, /* complain_on_overflow */ 367 bfd_elf_generic_reloc, /* special_function */ 368 "R_PPC_REL14", /* name */ 369 FALSE, /* partial_inplace */ 370 0, /* src_mask */ 371 0xfffc, /* dst_mask */ 372 TRUE), /* pcrel_offset */ 373 374 /* A relative 16 bit branch. Bit 10 should be set to indicate that 375 the branch is expected to be taken. The lower two bits must be 376 zero. */ 377 HOWTO (R_PPC_REL14_BRTAKEN, /* type */ 378 0, /* rightshift */ 379 2, /* size (0 = byte, 1 = short, 2 = long) */ 380 16, /* bitsize */ 381 TRUE, /* pc_relative */ 382 0, /* bitpos */ 383 complain_overflow_signed, /* complain_on_overflow */ 384 bfd_elf_generic_reloc, /* special_function */ 385 "R_PPC_REL14_BRTAKEN", /* name */ 386 FALSE, /* partial_inplace */ 387 0, /* src_mask */ 388 0xfffc, /* dst_mask */ 389 TRUE), /* pcrel_offset */ 390 391 /* A relative 16 bit branch. Bit 10 should be set to indicate that 392 the branch is not expected to be taken. The lower two bits must 393 be zero. */ 394 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */ 395 0, /* rightshift */ 396 2, /* size (0 = byte, 1 = short, 2 = long) */ 397 16, /* bitsize */ 398 TRUE, /* pc_relative */ 399 0, /* bitpos */ 400 complain_overflow_signed, /* complain_on_overflow */ 401 bfd_elf_generic_reloc, /* special_function */ 402 "R_PPC_REL14_BRNTAKEN",/* name */ 403 FALSE, /* partial_inplace */ 404 0, /* src_mask */ 405 0xfffc, /* dst_mask */ 406 TRUE), /* pcrel_offset */ 407 408 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the 409 symbol. */ 410 HOWTO (R_PPC_GOT16, /* type */ 411 0, /* rightshift */ 412 1, /* size (0 = byte, 1 = short, 2 = long) */ 413 16, /* bitsize */ 414 FALSE, /* pc_relative */ 415 0, /* bitpos */ 416 complain_overflow_signed, /* complain_on_overflow */ 417 ppc_elf_unhandled_reloc, /* special_function */ 418 "R_PPC_GOT16", /* name */ 419 FALSE, /* partial_inplace */ 420 0, /* src_mask */ 421 0xffff, /* dst_mask */ 422 FALSE), /* pcrel_offset */ 423 424 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for 425 the symbol. */ 426 HOWTO (R_PPC_GOT16_LO, /* type */ 427 0, /* rightshift */ 428 1, /* size (0 = byte, 1 = short, 2 = long) */ 429 16, /* bitsize */ 430 FALSE, /* pc_relative */ 431 0, /* bitpos */ 432 complain_overflow_dont, /* complain_on_overflow */ 433 ppc_elf_unhandled_reloc, /* special_function */ 434 "R_PPC_GOT16_LO", /* name */ 435 FALSE, /* partial_inplace */ 436 0, /* src_mask */ 437 0xffff, /* dst_mask */ 438 FALSE), /* pcrel_offset */ 439 440 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for 441 the symbol. */ 442 HOWTO (R_PPC_GOT16_HI, /* type */ 443 16, /* rightshift */ 444 1, /* size (0 = byte, 1 = short, 2 = long) */ 445 16, /* bitsize */ 446 FALSE, /* pc_relative */ 447 0, /* bitpos */ 448 complain_overflow_dont, /* complain_on_overflow */ 449 ppc_elf_unhandled_reloc, /* special_function */ 450 "R_PPC_GOT16_HI", /* name */ 451 FALSE, /* partial_inplace */ 452 0, /* src_mask */ 453 0xffff, /* dst_mask */ 454 FALSE), /* pcrel_offset */ 455 456 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for 457 the symbol. */ 458 HOWTO (R_PPC_GOT16_HA, /* type */ 459 16, /* rightshift */ 460 1, /* size (0 = byte, 1 = short, 2 = long) */ 461 16, /* bitsize */ 462 FALSE, /* pc_relative */ 463 0, /* bitpos */ 464 complain_overflow_dont, /* complain_on_overflow */ 465 ppc_elf_unhandled_reloc, /* special_function */ 466 "R_PPC_GOT16_HA", /* name */ 467 FALSE, /* partial_inplace */ 468 0, /* src_mask */ 469 0xffff, /* dst_mask */ 470 FALSE), /* pcrel_offset */ 471 472 /* Like R_PPC_REL24, but referring to the procedure linkage table 473 entry for the symbol. */ 474 HOWTO (R_PPC_PLTREL24, /* type */ 475 0, /* rightshift */ 476 2, /* size (0 = byte, 1 = short, 2 = long) */ 477 26, /* bitsize */ 478 TRUE, /* pc_relative */ 479 0, /* bitpos */ 480 complain_overflow_signed, /* complain_on_overflow */ 481 ppc_elf_unhandled_reloc, /* special_function */ 482 "R_PPC_PLTREL24", /* name */ 483 FALSE, /* partial_inplace */ 484 0, /* src_mask */ 485 0x3fffffc, /* dst_mask */ 486 TRUE), /* pcrel_offset */ 487 488 /* This is used only by the dynamic linker. The symbol should exist 489 both in the object being run and in some shared library. The 490 dynamic linker copies the data addressed by the symbol from the 491 shared library into the object, because the object being 492 run has to have the data at some particular address. */ 493 HOWTO (R_PPC_COPY, /* type */ 494 0, /* rightshift */ 495 2, /* size (0 = byte, 1 = short, 2 = long) */ 496 32, /* bitsize */ 497 FALSE, /* pc_relative */ 498 0, /* bitpos */ 499 complain_overflow_dont, /* complain_on_overflow */ 500 ppc_elf_unhandled_reloc, /* special_function */ 501 "R_PPC_COPY", /* name */ 502 FALSE, /* partial_inplace */ 503 0, /* src_mask */ 504 0, /* dst_mask */ 505 FALSE), /* pcrel_offset */ 506 507 /* Like R_PPC_ADDR32, but used when setting global offset table 508 entries. */ 509 HOWTO (R_PPC_GLOB_DAT, /* type */ 510 0, /* rightshift */ 511 2, /* size (0 = byte, 1 = short, 2 = long) */ 512 32, /* bitsize */ 513 FALSE, /* pc_relative */ 514 0, /* bitpos */ 515 complain_overflow_dont, /* complain_on_overflow */ 516 ppc_elf_unhandled_reloc, /* special_function */ 517 "R_PPC_GLOB_DAT", /* name */ 518 FALSE, /* partial_inplace */ 519 0, /* src_mask */ 520 0xffffffff, /* dst_mask */ 521 FALSE), /* pcrel_offset */ 522 523 /* Marks a procedure linkage table entry for a symbol. */ 524 HOWTO (R_PPC_JMP_SLOT, /* type */ 525 0, /* rightshift */ 526 2, /* size (0 = byte, 1 = short, 2 = long) */ 527 32, /* bitsize */ 528 FALSE, /* pc_relative */ 529 0, /* bitpos */ 530 complain_overflow_dont, /* complain_on_overflow */ 531 ppc_elf_unhandled_reloc, /* special_function */ 532 "R_PPC_JMP_SLOT", /* name */ 533 FALSE, /* partial_inplace */ 534 0, /* src_mask */ 535 0, /* dst_mask */ 536 FALSE), /* pcrel_offset */ 537 538 /* Used only by the dynamic linker. When the object is run, this 539 longword is set to the load address of the object, plus the 540 addend. */ 541 HOWTO (R_PPC_RELATIVE, /* type */ 542 0, /* rightshift */ 543 2, /* size (0 = byte, 1 = short, 2 = long) */ 544 32, /* bitsize */ 545 FALSE, /* pc_relative */ 546 0, /* bitpos */ 547 complain_overflow_dont, /* complain_on_overflow */ 548 bfd_elf_generic_reloc, /* special_function */ 549 "R_PPC_RELATIVE", /* name */ 550 FALSE, /* partial_inplace */ 551 0, /* src_mask */ 552 0xffffffff, /* dst_mask */ 553 FALSE), /* pcrel_offset */ 554 555 /* Like R_PPC_REL24, but uses the value of the symbol within the 556 object rather than the final value. Normally used for 557 _GLOBAL_OFFSET_TABLE_. */ 558 HOWTO (R_PPC_LOCAL24PC, /* type */ 559 0, /* rightshift */ 560 2, /* size (0 = byte, 1 = short, 2 = long) */ 561 26, /* bitsize */ 562 TRUE, /* pc_relative */ 563 0, /* bitpos */ 564 complain_overflow_signed, /* complain_on_overflow */ 565 bfd_elf_generic_reloc, /* special_function */ 566 "R_PPC_LOCAL24PC", /* name */ 567 FALSE, /* partial_inplace */ 568 0, /* src_mask */ 569 0x3fffffc, /* dst_mask */ 570 TRUE), /* pcrel_offset */ 571 572 /* Like R_PPC_ADDR32, but may be unaligned. */ 573 HOWTO (R_PPC_UADDR32, /* type */ 574 0, /* rightshift */ 575 2, /* size (0 = byte, 1 = short, 2 = long) */ 576 32, /* bitsize */ 577 FALSE, /* pc_relative */ 578 0, /* bitpos */ 579 complain_overflow_dont, /* complain_on_overflow */ 580 bfd_elf_generic_reloc, /* special_function */ 581 "R_PPC_UADDR32", /* name */ 582 FALSE, /* partial_inplace */ 583 0, /* src_mask */ 584 0xffffffff, /* dst_mask */ 585 FALSE), /* pcrel_offset */ 586 587 /* Like R_PPC_ADDR16, but may be unaligned. */ 588 HOWTO (R_PPC_UADDR16, /* type */ 589 0, /* rightshift */ 590 1, /* size (0 = byte, 1 = short, 2 = long) */ 591 16, /* bitsize */ 592 FALSE, /* pc_relative */ 593 0, /* bitpos */ 594 complain_overflow_bitfield, /* complain_on_overflow */ 595 bfd_elf_generic_reloc, /* special_function */ 596 "R_PPC_UADDR16", /* name */ 597 FALSE, /* partial_inplace */ 598 0, /* src_mask */ 599 0xffff, /* dst_mask */ 600 FALSE), /* pcrel_offset */ 601 602 /* 32-bit PC relative */ 603 HOWTO (R_PPC_REL32, /* type */ 604 0, /* rightshift */ 605 2, /* size (0 = byte, 1 = short, 2 = long) */ 606 32, /* bitsize */ 607 TRUE, /* pc_relative */ 608 0, /* bitpos */ 609 complain_overflow_dont, /* complain_on_overflow */ 610 bfd_elf_generic_reloc, /* special_function */ 611 "R_PPC_REL32", /* name */ 612 FALSE, /* partial_inplace */ 613 0, /* src_mask */ 614 0xffffffff, /* dst_mask */ 615 TRUE), /* pcrel_offset */ 616 617 /* 32-bit relocation to the symbol's procedure linkage table. 618 FIXME: not supported. */ 619 HOWTO (R_PPC_PLT32, /* type */ 620 0, /* rightshift */ 621 2, /* size (0 = byte, 1 = short, 2 = long) */ 622 32, /* bitsize */ 623 FALSE, /* pc_relative */ 624 0, /* bitpos */ 625 complain_overflow_dont, /* complain_on_overflow */ 626 ppc_elf_unhandled_reloc, /* special_function */ 627 "R_PPC_PLT32", /* name */ 628 FALSE, /* partial_inplace */ 629 0, /* src_mask */ 630 0, /* dst_mask */ 631 FALSE), /* pcrel_offset */ 632 633 /* 32-bit PC relative relocation to the symbol's procedure linkage table. 634 FIXME: not supported. */ 635 HOWTO (R_PPC_PLTREL32, /* type */ 636 0, /* rightshift */ 637 2, /* size (0 = byte, 1 = short, 2 = long) */ 638 32, /* bitsize */ 639 TRUE, /* pc_relative */ 640 0, /* bitpos */ 641 complain_overflow_dont, /* complain_on_overflow */ 642 ppc_elf_unhandled_reloc, /* special_function */ 643 "R_PPC_PLTREL32", /* name */ 644 FALSE, /* partial_inplace */ 645 0, /* src_mask */ 646 0, /* dst_mask */ 647 TRUE), /* pcrel_offset */ 648 649 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for 650 the symbol. */ 651 HOWTO (R_PPC_PLT16_LO, /* type */ 652 0, /* rightshift */ 653 1, /* size (0 = byte, 1 = short, 2 = long) */ 654 16, /* bitsize */ 655 FALSE, /* pc_relative */ 656 0, /* bitpos */ 657 complain_overflow_dont, /* complain_on_overflow */ 658 ppc_elf_unhandled_reloc, /* special_function */ 659 "R_PPC_PLT16_LO", /* name */ 660 FALSE, /* partial_inplace */ 661 0, /* src_mask */ 662 0xffff, /* dst_mask */ 663 FALSE), /* pcrel_offset */ 664 665 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for 666 the symbol. */ 667 HOWTO (R_PPC_PLT16_HI, /* type */ 668 16, /* rightshift */ 669 1, /* size (0 = byte, 1 = short, 2 = long) */ 670 16, /* bitsize */ 671 FALSE, /* pc_relative */ 672 0, /* bitpos */ 673 complain_overflow_dont, /* complain_on_overflow */ 674 ppc_elf_unhandled_reloc, /* special_function */ 675 "R_PPC_PLT16_HI", /* name */ 676 FALSE, /* partial_inplace */ 677 0, /* src_mask */ 678 0xffff, /* dst_mask */ 679 FALSE), /* pcrel_offset */ 680 681 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for 682 the symbol. */ 683 HOWTO (R_PPC_PLT16_HA, /* type */ 684 16, /* rightshift */ 685 1, /* size (0 = byte, 1 = short, 2 = long) */ 686 16, /* bitsize */ 687 FALSE, /* pc_relative */ 688 0, /* bitpos */ 689 complain_overflow_dont, /* complain_on_overflow */ 690 ppc_elf_unhandled_reloc, /* special_function */ 691 "R_PPC_PLT16_HA", /* name */ 692 FALSE, /* partial_inplace */ 693 0, /* src_mask */ 694 0xffff, /* dst_mask */ 695 FALSE), /* pcrel_offset */ 696 697 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with 698 small data items. */ 699 HOWTO (R_PPC_SDAREL16, /* type */ 700 0, /* rightshift */ 701 1, /* size (0 = byte, 1 = short, 2 = long) */ 702 16, /* bitsize */ 703 FALSE, /* pc_relative */ 704 0, /* bitpos */ 705 complain_overflow_signed, /* complain_on_overflow */ 706 ppc_elf_unhandled_reloc, /* special_function */ 707 "R_PPC_SDAREL16", /* name */ 708 FALSE, /* partial_inplace */ 709 0, /* src_mask */ 710 0xffff, /* dst_mask */ 711 FALSE), /* pcrel_offset */ 712 713 /* 16-bit section relative relocation. */ 714 HOWTO (R_PPC_SECTOFF, /* type */ 715 0, /* rightshift */ 716 1, /* size (0 = byte, 1 = short, 2 = long) */ 717 16, /* bitsize */ 718 FALSE, /* pc_relative */ 719 0, /* bitpos */ 720 complain_overflow_signed, /* complain_on_overflow */ 721 ppc_elf_unhandled_reloc, /* special_function */ 722 "R_PPC_SECTOFF", /* name */ 723 FALSE, /* partial_inplace */ 724 0, /* src_mask */ 725 0xffff, /* dst_mask */ 726 FALSE), /* pcrel_offset */ 727 728 /* 16-bit lower half section relative relocation. */ 729 HOWTO (R_PPC_SECTOFF_LO, /* type */ 730 0, /* rightshift */ 731 1, /* size (0 = byte, 1 = short, 2 = long) */ 732 16, /* bitsize */ 733 FALSE, /* pc_relative */ 734 0, /* bitpos */ 735 complain_overflow_dont, /* complain_on_overflow */ 736 ppc_elf_unhandled_reloc, /* special_function */ 737 "R_PPC_SECTOFF_LO", /* name */ 738 FALSE, /* partial_inplace */ 739 0, /* src_mask */ 740 0xffff, /* dst_mask */ 741 FALSE), /* pcrel_offset */ 742 743 /* 16-bit upper half section relative relocation. */ 744 HOWTO (R_PPC_SECTOFF_HI, /* type */ 745 16, /* rightshift */ 746 1, /* size (0 = byte, 1 = short, 2 = long) */ 747 16, /* bitsize */ 748 FALSE, /* pc_relative */ 749 0, /* bitpos */ 750 complain_overflow_dont, /* complain_on_overflow */ 751 ppc_elf_unhandled_reloc, /* special_function */ 752 "R_PPC_SECTOFF_HI", /* name */ 753 FALSE, /* partial_inplace */ 754 0, /* src_mask */ 755 0xffff, /* dst_mask */ 756 FALSE), /* pcrel_offset */ 757 758 /* 16-bit upper half adjusted section relative relocation. */ 759 HOWTO (R_PPC_SECTOFF_HA, /* type */ 760 16, /* rightshift */ 761 1, /* size (0 = byte, 1 = short, 2 = long) */ 762 16, /* bitsize */ 763 FALSE, /* pc_relative */ 764 0, /* bitpos */ 765 complain_overflow_dont, /* complain_on_overflow */ 766 ppc_elf_unhandled_reloc, /* special_function */ 767 "R_PPC_SECTOFF_HA", /* name */ 768 FALSE, /* partial_inplace */ 769 0, /* src_mask */ 770 0xffff, /* dst_mask */ 771 FALSE), /* pcrel_offset */ 772 773 /* Marker relocs for TLS. */ 774 HOWTO (R_PPC_TLS, 775 0, /* rightshift */ 776 2, /* size (0 = byte, 1 = short, 2 = long) */ 777 32, /* bitsize */ 778 FALSE, /* pc_relative */ 779 0, /* bitpos */ 780 complain_overflow_dont, /* complain_on_overflow */ 781 bfd_elf_generic_reloc, /* special_function */ 782 "R_PPC_TLS", /* name */ 783 FALSE, /* partial_inplace */ 784 0, /* src_mask */ 785 0, /* dst_mask */ 786 FALSE), /* pcrel_offset */ 787 788 HOWTO (R_PPC_TLSGD, 789 0, /* rightshift */ 790 2, /* size (0 = byte, 1 = short, 2 = long) */ 791 32, /* bitsize */ 792 FALSE, /* pc_relative */ 793 0, /* bitpos */ 794 complain_overflow_dont, /* complain_on_overflow */ 795 bfd_elf_generic_reloc, /* special_function */ 796 "R_PPC_TLSGD", /* name */ 797 FALSE, /* partial_inplace */ 798 0, /* src_mask */ 799 0, /* dst_mask */ 800 FALSE), /* pcrel_offset */ 801 802 HOWTO (R_PPC_TLSLD, 803 0, /* rightshift */ 804 2, /* size (0 = byte, 1 = short, 2 = long) */ 805 32, /* bitsize */ 806 FALSE, /* pc_relative */ 807 0, /* bitpos */ 808 complain_overflow_dont, /* complain_on_overflow */ 809 bfd_elf_generic_reloc, /* special_function */ 810 "R_PPC_TLSLD", /* name */ 811 FALSE, /* partial_inplace */ 812 0, /* src_mask */ 813 0, /* dst_mask */ 814 FALSE), /* pcrel_offset */ 815 816 /* Computes the load module index of the load module that contains the 817 definition of its TLS sym. */ 818 HOWTO (R_PPC_DTPMOD32, 819 0, /* rightshift */ 820 2, /* size (0 = byte, 1 = short, 2 = long) */ 821 32, /* bitsize */ 822 FALSE, /* pc_relative */ 823 0, /* bitpos */ 824 complain_overflow_dont, /* complain_on_overflow */ 825 ppc_elf_unhandled_reloc, /* special_function */ 826 "R_PPC_DTPMOD32", /* name */ 827 FALSE, /* partial_inplace */ 828 0, /* src_mask */ 829 0xffffffff, /* dst_mask */ 830 FALSE), /* pcrel_offset */ 831 832 /* Computes a dtv-relative displacement, the difference between the value 833 of sym+add and the base address of the thread-local storage block that 834 contains the definition of sym, minus 0x8000. */ 835 HOWTO (R_PPC_DTPREL32, 836 0, /* rightshift */ 837 2, /* size (0 = byte, 1 = short, 2 = long) */ 838 32, /* bitsize */ 839 FALSE, /* pc_relative */ 840 0, /* bitpos */ 841 complain_overflow_dont, /* complain_on_overflow */ 842 ppc_elf_unhandled_reloc, /* special_function */ 843 "R_PPC_DTPREL32", /* name */ 844 FALSE, /* partial_inplace */ 845 0, /* src_mask */ 846 0xffffffff, /* dst_mask */ 847 FALSE), /* pcrel_offset */ 848 849 /* A 16 bit dtprel reloc. */ 850 HOWTO (R_PPC_DTPREL16, 851 0, /* rightshift */ 852 1, /* size (0 = byte, 1 = short, 2 = long) */ 853 16, /* bitsize */ 854 FALSE, /* pc_relative */ 855 0, /* bitpos */ 856 complain_overflow_signed, /* complain_on_overflow */ 857 ppc_elf_unhandled_reloc, /* special_function */ 858 "R_PPC_DTPREL16", /* name */ 859 FALSE, /* partial_inplace */ 860 0, /* src_mask */ 861 0xffff, /* dst_mask */ 862 FALSE), /* pcrel_offset */ 863 864 /* Like DTPREL16, but no overflow. */ 865 HOWTO (R_PPC_DTPREL16_LO, 866 0, /* rightshift */ 867 1, /* size (0 = byte, 1 = short, 2 = long) */ 868 16, /* bitsize */ 869 FALSE, /* pc_relative */ 870 0, /* bitpos */ 871 complain_overflow_dont, /* complain_on_overflow */ 872 ppc_elf_unhandled_reloc, /* special_function */ 873 "R_PPC_DTPREL16_LO", /* name */ 874 FALSE, /* partial_inplace */ 875 0, /* src_mask */ 876 0xffff, /* dst_mask */ 877 FALSE), /* pcrel_offset */ 878 879 /* Like DTPREL16_LO, but next higher group of 16 bits. */ 880 HOWTO (R_PPC_DTPREL16_HI, 881 16, /* rightshift */ 882 1, /* size (0 = byte, 1 = short, 2 = long) */ 883 16, /* bitsize */ 884 FALSE, /* pc_relative */ 885 0, /* bitpos */ 886 complain_overflow_dont, /* complain_on_overflow */ 887 ppc_elf_unhandled_reloc, /* special_function */ 888 "R_PPC_DTPREL16_HI", /* name */ 889 FALSE, /* partial_inplace */ 890 0, /* src_mask */ 891 0xffff, /* dst_mask */ 892 FALSE), /* pcrel_offset */ 893 894 /* Like DTPREL16_HI, but adjust for low 16 bits. */ 895 HOWTO (R_PPC_DTPREL16_HA, 896 16, /* rightshift */ 897 1, /* size (0 = byte, 1 = short, 2 = long) */ 898 16, /* bitsize */ 899 FALSE, /* pc_relative */ 900 0, /* bitpos */ 901 complain_overflow_dont, /* complain_on_overflow */ 902 ppc_elf_unhandled_reloc, /* special_function */ 903 "R_PPC_DTPREL16_HA", /* name */ 904 FALSE, /* partial_inplace */ 905 0, /* src_mask */ 906 0xffff, /* dst_mask */ 907 FALSE), /* pcrel_offset */ 908 909 /* Computes a tp-relative displacement, the difference between the value of 910 sym+add and the value of the thread pointer (r13). */ 911 HOWTO (R_PPC_TPREL32, 912 0, /* rightshift */ 913 2, /* size (0 = byte, 1 = short, 2 = long) */ 914 32, /* bitsize */ 915 FALSE, /* pc_relative */ 916 0, /* bitpos */ 917 complain_overflow_dont, /* complain_on_overflow */ 918 ppc_elf_unhandled_reloc, /* special_function */ 919 "R_PPC_TPREL32", /* name */ 920 FALSE, /* partial_inplace */ 921 0, /* src_mask */ 922 0xffffffff, /* dst_mask */ 923 FALSE), /* pcrel_offset */ 924 925 /* A 16 bit tprel reloc. */ 926 HOWTO (R_PPC_TPREL16, 927 0, /* rightshift */ 928 1, /* size (0 = byte, 1 = short, 2 = long) */ 929 16, /* bitsize */ 930 FALSE, /* pc_relative */ 931 0, /* bitpos */ 932 complain_overflow_signed, /* complain_on_overflow */ 933 ppc_elf_unhandled_reloc, /* special_function */ 934 "R_PPC_TPREL16", /* name */ 935 FALSE, /* partial_inplace */ 936 0, /* src_mask */ 937 0xffff, /* dst_mask */ 938 FALSE), /* pcrel_offset */ 939 940 /* Like TPREL16, but no overflow. */ 941 HOWTO (R_PPC_TPREL16_LO, 942 0, /* rightshift */ 943 1, /* size (0 = byte, 1 = short, 2 = long) */ 944 16, /* bitsize */ 945 FALSE, /* pc_relative */ 946 0, /* bitpos */ 947 complain_overflow_dont, /* complain_on_overflow */ 948 ppc_elf_unhandled_reloc, /* special_function */ 949 "R_PPC_TPREL16_LO", /* name */ 950 FALSE, /* partial_inplace */ 951 0, /* src_mask */ 952 0xffff, /* dst_mask */ 953 FALSE), /* pcrel_offset */ 954 955 /* Like TPREL16_LO, but next higher group of 16 bits. */ 956 HOWTO (R_PPC_TPREL16_HI, 957 16, /* rightshift */ 958 1, /* size (0 = byte, 1 = short, 2 = long) */ 959 16, /* bitsize */ 960 FALSE, /* pc_relative */ 961 0, /* bitpos */ 962 complain_overflow_dont, /* complain_on_overflow */ 963 ppc_elf_unhandled_reloc, /* special_function */ 964 "R_PPC_TPREL16_HI", /* name */ 965 FALSE, /* partial_inplace */ 966 0, /* src_mask */ 967 0xffff, /* dst_mask */ 968 FALSE), /* pcrel_offset */ 969 970 /* Like TPREL16_HI, but adjust for low 16 bits. */ 971 HOWTO (R_PPC_TPREL16_HA, 972 16, /* rightshift */ 973 1, /* size (0 = byte, 1 = short, 2 = long) */ 974 16, /* bitsize */ 975 FALSE, /* pc_relative */ 976 0, /* bitpos */ 977 complain_overflow_dont, /* complain_on_overflow */ 978 ppc_elf_unhandled_reloc, /* special_function */ 979 "R_PPC_TPREL16_HA", /* name */ 980 FALSE, /* partial_inplace */ 981 0, /* src_mask */ 982 0xffff, /* dst_mask */ 983 FALSE), /* pcrel_offset */ 984 985 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 986 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset 987 to the first entry. */ 988 HOWTO (R_PPC_GOT_TLSGD16, 989 0, /* rightshift */ 990 1, /* size (0 = byte, 1 = short, 2 = long) */ 991 16, /* bitsize */ 992 FALSE, /* pc_relative */ 993 0, /* bitpos */ 994 complain_overflow_signed, /* complain_on_overflow */ 995 ppc_elf_unhandled_reloc, /* special_function */ 996 "R_PPC_GOT_TLSGD16", /* name */ 997 FALSE, /* partial_inplace */ 998 0, /* src_mask */ 999 0xffff, /* dst_mask */ 1000 FALSE), /* pcrel_offset */ 1001 1002 /* Like GOT_TLSGD16, but no overflow. */ 1003 HOWTO (R_PPC_GOT_TLSGD16_LO, 1004 0, /* rightshift */ 1005 1, /* size (0 = byte, 1 = short, 2 = long) */ 1006 16, /* bitsize */ 1007 FALSE, /* pc_relative */ 1008 0, /* bitpos */ 1009 complain_overflow_dont, /* complain_on_overflow */ 1010 ppc_elf_unhandled_reloc, /* special_function */ 1011 "R_PPC_GOT_TLSGD16_LO", /* name */ 1012 FALSE, /* partial_inplace */ 1013 0, /* src_mask */ 1014 0xffff, /* dst_mask */ 1015 FALSE), /* pcrel_offset */ 1016 1017 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ 1018 HOWTO (R_PPC_GOT_TLSGD16_HI, 1019 16, /* rightshift */ 1020 1, /* size (0 = byte, 1 = short, 2 = long) */ 1021 16, /* bitsize */ 1022 FALSE, /* pc_relative */ 1023 0, /* bitpos */ 1024 complain_overflow_dont, /* complain_on_overflow */ 1025 ppc_elf_unhandled_reloc, /* special_function */ 1026 "R_PPC_GOT_TLSGD16_HI", /* name */ 1027 FALSE, /* partial_inplace */ 1028 0, /* src_mask */ 1029 0xffff, /* dst_mask */ 1030 FALSE), /* pcrel_offset */ 1031 1032 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ 1033 HOWTO (R_PPC_GOT_TLSGD16_HA, 1034 16, /* rightshift */ 1035 1, /* size (0 = byte, 1 = short, 2 = long) */ 1036 16, /* bitsize */ 1037 FALSE, /* pc_relative */ 1038 0, /* bitpos */ 1039 complain_overflow_dont, /* complain_on_overflow */ 1040 ppc_elf_unhandled_reloc, /* special_function */ 1041 "R_PPC_GOT_TLSGD16_HA", /* name */ 1042 FALSE, /* partial_inplace */ 1043 0, /* src_mask */ 1044 0xffff, /* dst_mask */ 1045 FALSE), /* pcrel_offset */ 1046 1047 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 1048 with values (sym+add)@dtpmod and zero, and computes the offset to the 1049 first entry. */ 1050 HOWTO (R_PPC_GOT_TLSLD16, 1051 0, /* rightshift */ 1052 1, /* size (0 = byte, 1 = short, 2 = long) */ 1053 16, /* bitsize */ 1054 FALSE, /* pc_relative */ 1055 0, /* bitpos */ 1056 complain_overflow_signed, /* complain_on_overflow */ 1057 ppc_elf_unhandled_reloc, /* special_function */ 1058 "R_PPC_GOT_TLSLD16", /* name */ 1059 FALSE, /* partial_inplace */ 1060 0, /* src_mask */ 1061 0xffff, /* dst_mask */ 1062 FALSE), /* pcrel_offset */ 1063 1064 /* Like GOT_TLSLD16, but no overflow. */ 1065 HOWTO (R_PPC_GOT_TLSLD16_LO, 1066 0, /* rightshift */ 1067 1, /* size (0 = byte, 1 = short, 2 = long) */ 1068 16, /* bitsize */ 1069 FALSE, /* pc_relative */ 1070 0, /* bitpos */ 1071 complain_overflow_dont, /* complain_on_overflow */ 1072 ppc_elf_unhandled_reloc, /* special_function */ 1073 "R_PPC_GOT_TLSLD16_LO", /* name */ 1074 FALSE, /* partial_inplace */ 1075 0, /* src_mask */ 1076 0xffff, /* dst_mask */ 1077 FALSE), /* pcrel_offset */ 1078 1079 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ 1080 HOWTO (R_PPC_GOT_TLSLD16_HI, 1081 16, /* rightshift */ 1082 1, /* size (0 = byte, 1 = short, 2 = long) */ 1083 16, /* bitsize */ 1084 FALSE, /* pc_relative */ 1085 0, /* bitpos */ 1086 complain_overflow_dont, /* complain_on_overflow */ 1087 ppc_elf_unhandled_reloc, /* special_function */ 1088 "R_PPC_GOT_TLSLD16_HI", /* name */ 1089 FALSE, /* partial_inplace */ 1090 0, /* src_mask */ 1091 0xffff, /* dst_mask */ 1092 FALSE), /* pcrel_offset */ 1093 1094 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ 1095 HOWTO (R_PPC_GOT_TLSLD16_HA, 1096 16, /* rightshift */ 1097 1, /* size (0 = byte, 1 = short, 2 = long) */ 1098 16, /* bitsize */ 1099 FALSE, /* pc_relative */ 1100 0, /* bitpos */ 1101 complain_overflow_dont, /* complain_on_overflow */ 1102 ppc_elf_unhandled_reloc, /* special_function */ 1103 "R_PPC_GOT_TLSLD16_HA", /* name */ 1104 FALSE, /* partial_inplace */ 1105 0, /* src_mask */ 1106 0xffff, /* dst_mask */ 1107 FALSE), /* pcrel_offset */ 1108 1109 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes 1110 the offset to the entry. */ 1111 HOWTO (R_PPC_GOT_DTPREL16, 1112 0, /* rightshift */ 1113 1, /* size (0 = byte, 1 = short, 2 = long) */ 1114 16, /* bitsize */ 1115 FALSE, /* pc_relative */ 1116 0, /* bitpos */ 1117 complain_overflow_signed, /* complain_on_overflow */ 1118 ppc_elf_unhandled_reloc, /* special_function */ 1119 "R_PPC_GOT_DTPREL16", /* name */ 1120 FALSE, /* partial_inplace */ 1121 0, /* src_mask */ 1122 0xffff, /* dst_mask */ 1123 FALSE), /* pcrel_offset */ 1124 1125 /* Like GOT_DTPREL16, but no overflow. */ 1126 HOWTO (R_PPC_GOT_DTPREL16_LO, 1127 0, /* rightshift */ 1128 1, /* size (0 = byte, 1 = short, 2 = long) */ 1129 16, /* bitsize */ 1130 FALSE, /* pc_relative */ 1131 0, /* bitpos */ 1132 complain_overflow_dont, /* complain_on_overflow */ 1133 ppc_elf_unhandled_reloc, /* special_function */ 1134 "R_PPC_GOT_DTPREL16_LO", /* name */ 1135 FALSE, /* partial_inplace */ 1136 0, /* src_mask */ 1137 0xffff, /* dst_mask */ 1138 FALSE), /* pcrel_offset */ 1139 1140 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */ 1141 HOWTO (R_PPC_GOT_DTPREL16_HI, 1142 16, /* rightshift */ 1143 1, /* size (0 = byte, 1 = short, 2 = long) */ 1144 16, /* bitsize */ 1145 FALSE, /* pc_relative */ 1146 0, /* bitpos */ 1147 complain_overflow_dont, /* complain_on_overflow */ 1148 ppc_elf_unhandled_reloc, /* special_function */ 1149 "R_PPC_GOT_DTPREL16_HI", /* name */ 1150 FALSE, /* partial_inplace */ 1151 0, /* src_mask */ 1152 0xffff, /* dst_mask */ 1153 FALSE), /* pcrel_offset */ 1154 1155 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ 1156 HOWTO (R_PPC_GOT_DTPREL16_HA, 1157 16, /* rightshift */ 1158 1, /* size (0 = byte, 1 = short, 2 = long) */ 1159 16, /* bitsize */ 1160 FALSE, /* pc_relative */ 1161 0, /* bitpos */ 1162 complain_overflow_dont, /* complain_on_overflow */ 1163 ppc_elf_unhandled_reloc, /* special_function */ 1164 "R_PPC_GOT_DTPREL16_HA", /* name */ 1165 FALSE, /* partial_inplace */ 1166 0, /* src_mask */ 1167 0xffff, /* dst_mask */ 1168 FALSE), /* pcrel_offset */ 1169 1170 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the 1171 offset to the entry. */ 1172 HOWTO (R_PPC_GOT_TPREL16, 1173 0, /* rightshift */ 1174 1, /* size (0 = byte, 1 = short, 2 = long) */ 1175 16, /* bitsize */ 1176 FALSE, /* pc_relative */ 1177 0, /* bitpos */ 1178 complain_overflow_signed, /* complain_on_overflow */ 1179 ppc_elf_unhandled_reloc, /* special_function */ 1180 "R_PPC_GOT_TPREL16", /* name */ 1181 FALSE, /* partial_inplace */ 1182 0, /* src_mask */ 1183 0xffff, /* dst_mask */ 1184 FALSE), /* pcrel_offset */ 1185 1186 /* Like GOT_TPREL16, but no overflow. */ 1187 HOWTO (R_PPC_GOT_TPREL16_LO, 1188 0, /* rightshift */ 1189 1, /* size (0 = byte, 1 = short, 2 = long) */ 1190 16, /* bitsize */ 1191 FALSE, /* pc_relative */ 1192 0, /* bitpos */ 1193 complain_overflow_dont, /* complain_on_overflow */ 1194 ppc_elf_unhandled_reloc, /* special_function */ 1195 "R_PPC_GOT_TPREL16_LO", /* name */ 1196 FALSE, /* partial_inplace */ 1197 0, /* src_mask */ 1198 0xffff, /* dst_mask */ 1199 FALSE), /* pcrel_offset */ 1200 1201 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */ 1202 HOWTO (R_PPC_GOT_TPREL16_HI, 1203 16, /* rightshift */ 1204 1, /* size (0 = byte, 1 = short, 2 = long) */ 1205 16, /* bitsize */ 1206 FALSE, /* pc_relative */ 1207 0, /* bitpos */ 1208 complain_overflow_dont, /* complain_on_overflow */ 1209 ppc_elf_unhandled_reloc, /* special_function */ 1210 "R_PPC_GOT_TPREL16_HI", /* name */ 1211 FALSE, /* partial_inplace */ 1212 0, /* src_mask */ 1213 0xffff, /* dst_mask */ 1214 FALSE), /* pcrel_offset */ 1215 1216 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ 1217 HOWTO (R_PPC_GOT_TPREL16_HA, 1218 16, /* rightshift */ 1219 1, /* size (0 = byte, 1 = short, 2 = long) */ 1220 16, /* bitsize */ 1221 FALSE, /* pc_relative */ 1222 0, /* bitpos */ 1223 complain_overflow_dont, /* complain_on_overflow */ 1224 ppc_elf_unhandled_reloc, /* special_function */ 1225 "R_PPC_GOT_TPREL16_HA", /* name */ 1226 FALSE, /* partial_inplace */ 1227 0, /* src_mask */ 1228 0xffff, /* dst_mask */ 1229 FALSE), /* pcrel_offset */ 1230 1231 /* The remaining relocs are from the Embedded ELF ABI, and are not 1232 in the SVR4 ELF ABI. */ 1233 1234 /* 32 bit value resulting from the addend minus the symbol. */ 1235 HOWTO (R_PPC_EMB_NADDR32, /* type */ 1236 0, /* rightshift */ 1237 2, /* size (0 = byte, 1 = short, 2 = long) */ 1238 32, /* bitsize */ 1239 FALSE, /* pc_relative */ 1240 0, /* bitpos */ 1241 complain_overflow_dont, /* complain_on_overflow */ 1242 ppc_elf_unhandled_reloc, /* special_function */ 1243 "R_PPC_EMB_NADDR32", /* name */ 1244 FALSE, /* partial_inplace */ 1245 0, /* src_mask */ 1246 0xffffffff, /* dst_mask */ 1247 FALSE), /* pcrel_offset */ 1248 1249 /* 16 bit value resulting from the addend minus the symbol. */ 1250 HOWTO (R_PPC_EMB_NADDR16, /* type */ 1251 0, /* rightshift */ 1252 1, /* size (0 = byte, 1 = short, 2 = long) */ 1253 16, /* bitsize */ 1254 FALSE, /* pc_relative */ 1255 0, /* bitpos */ 1256 complain_overflow_signed, /* complain_on_overflow */ 1257 ppc_elf_unhandled_reloc, /* special_function */ 1258 "R_PPC_EMB_NADDR16", /* name */ 1259 FALSE, /* partial_inplace */ 1260 0, /* src_mask */ 1261 0xffff, /* dst_mask */ 1262 FALSE), /* pcrel_offset */ 1263 1264 /* 16 bit value resulting from the addend minus the symbol. */ 1265 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */ 1266 0, /* rightshift */ 1267 1, /* size (0 = byte, 1 = short, 2 = long) */ 1268 16, /* bitsize */ 1269 FALSE, /* pc_relative */ 1270 0, /* bitpos */ 1271 complain_overflow_dont,/* complain_on_overflow */ 1272 ppc_elf_unhandled_reloc, /* special_function */ 1273 "R_PPC_EMB_ADDR16_LO", /* name */ 1274 FALSE, /* partial_inplace */ 1275 0, /* src_mask */ 1276 0xffff, /* dst_mask */ 1277 FALSE), /* pcrel_offset */ 1278 1279 /* The high order 16 bits of the addend minus the symbol. */ 1280 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */ 1281 16, /* rightshift */ 1282 1, /* size (0 = byte, 1 = short, 2 = long) */ 1283 16, /* bitsize */ 1284 FALSE, /* pc_relative */ 1285 0, /* bitpos */ 1286 complain_overflow_dont, /* complain_on_overflow */ 1287 ppc_elf_unhandled_reloc, /* special_function */ 1288 "R_PPC_EMB_NADDR16_HI", /* name */ 1289 FALSE, /* partial_inplace */ 1290 0, /* src_mask */ 1291 0xffff, /* dst_mask */ 1292 FALSE), /* pcrel_offset */ 1293 1294 /* The high order 16 bits of the result of the addend minus the address, 1295 plus 1 if the contents of the low 16 bits, treated as a signed number, 1296 is negative. */ 1297 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */ 1298 16, /* rightshift */ 1299 1, /* size (0 = byte, 1 = short, 2 = long) */ 1300 16, /* bitsize */ 1301 FALSE, /* pc_relative */ 1302 0, /* bitpos */ 1303 complain_overflow_dont, /* complain_on_overflow */ 1304 ppc_elf_unhandled_reloc, /* special_function */ 1305 "R_PPC_EMB_NADDR16_HA", /* name */ 1306 FALSE, /* partial_inplace */ 1307 0, /* src_mask */ 1308 0xffff, /* dst_mask */ 1309 FALSE), /* pcrel_offset */ 1310 1311 /* 16 bit value resulting from allocating a 4 byte word to hold an 1312 address in the .sdata section, and returning the offset from 1313 _SDA_BASE_ for that relocation. */ 1314 HOWTO (R_PPC_EMB_SDAI16, /* type */ 1315 0, /* rightshift */ 1316 1, /* size (0 = byte, 1 = short, 2 = long) */ 1317 16, /* bitsize */ 1318 FALSE, /* pc_relative */ 1319 0, /* bitpos */ 1320 complain_overflow_signed, /* complain_on_overflow */ 1321 ppc_elf_unhandled_reloc, /* special_function */ 1322 "R_PPC_EMB_SDAI16", /* name */ 1323 FALSE, /* partial_inplace */ 1324 0, /* src_mask */ 1325 0xffff, /* dst_mask */ 1326 FALSE), /* pcrel_offset */ 1327 1328 /* 16 bit value resulting from allocating a 4 byte word to hold an 1329 address in the .sdata2 section, and returning the offset from 1330 _SDA2_BASE_ for that relocation. */ 1331 HOWTO (R_PPC_EMB_SDA2I16, /* type */ 1332 0, /* rightshift */ 1333 1, /* size (0 = byte, 1 = short, 2 = long) */ 1334 16, /* bitsize */ 1335 FALSE, /* pc_relative */ 1336 0, /* bitpos */ 1337 complain_overflow_signed, /* complain_on_overflow */ 1338 ppc_elf_unhandled_reloc, /* special_function */ 1339 "R_PPC_EMB_SDA2I16", /* name */ 1340 FALSE, /* partial_inplace */ 1341 0, /* src_mask */ 1342 0xffff, /* dst_mask */ 1343 FALSE), /* pcrel_offset */ 1344 1345 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with 1346 small data items. */ 1347 HOWTO (R_PPC_EMB_SDA2REL, /* type */ 1348 0, /* rightshift */ 1349 1, /* size (0 = byte, 1 = short, 2 = long) */ 1350 16, /* bitsize */ 1351 FALSE, /* pc_relative */ 1352 0, /* bitpos */ 1353 complain_overflow_signed, /* complain_on_overflow */ 1354 ppc_elf_unhandled_reloc, /* special_function */ 1355 "R_PPC_EMB_SDA2REL", /* name */ 1356 FALSE, /* partial_inplace */ 1357 0, /* src_mask */ 1358 0xffff, /* dst_mask */ 1359 FALSE), /* pcrel_offset */ 1360 1361 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit 1362 signed offset from the appropriate base, and filling in the register 1363 field with the appropriate register (0, 2, or 13). */ 1364 HOWTO (R_PPC_EMB_SDA21, /* type */ 1365 0, /* rightshift */ 1366 2, /* size (0 = byte, 1 = short, 2 = long) */ 1367 16, /* bitsize */ 1368 FALSE, /* pc_relative */ 1369 0, /* bitpos */ 1370 complain_overflow_signed, /* complain_on_overflow */ 1371 ppc_elf_unhandled_reloc, /* special_function */ 1372 "R_PPC_EMB_SDA21", /* name */ 1373 FALSE, /* partial_inplace */ 1374 0, /* src_mask */ 1375 0xffff, /* dst_mask */ 1376 FALSE), /* pcrel_offset */ 1377 1378 /* Relocation not handled: R_PPC_EMB_MRKREF */ 1379 /* Relocation not handled: R_PPC_EMB_RELSEC16 */ 1380 /* Relocation not handled: R_PPC_EMB_RELST_LO */ 1381 /* Relocation not handled: R_PPC_EMB_RELST_HI */ 1382 /* Relocation not handled: R_PPC_EMB_RELST_HA */ 1383 /* Relocation not handled: R_PPC_EMB_BIT_FLD */ 1384 1385 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling 1386 in the 16 bit signed offset from the appropriate base, and filling in the 1387 register field with the appropriate register (0, 2, or 13). */ 1388 HOWTO (R_PPC_EMB_RELSDA, /* type */ 1389 0, /* rightshift */ 1390 1, /* size (0 = byte, 1 = short, 2 = long) */ 1391 16, /* bitsize */ 1392 FALSE, /* pc_relative */ 1393 0, /* bitpos */ 1394 complain_overflow_signed, /* complain_on_overflow */ 1395 ppc_elf_unhandled_reloc, /* special_function */ 1396 "R_PPC_EMB_RELSDA", /* name */ 1397 FALSE, /* partial_inplace */ 1398 0, /* src_mask */ 1399 0xffff, /* dst_mask */ 1400 FALSE), /* pcrel_offset */ 1401 1402 /* A relative 8 bit branch. */ 1403 HOWTO (R_PPC_VLE_REL8, /* type */ 1404 1, /* rightshift */ 1405 1, /* size (0 = byte, 1 = short, 2 = long) */ 1406 8, /* bitsize */ 1407 TRUE, /* pc_relative */ 1408 0, /* bitpos */ 1409 complain_overflow_signed, /* complain_on_overflow */ 1410 bfd_elf_generic_reloc, /* special_function */ 1411 "R_PPC_VLE_REL8", /* name */ 1412 FALSE, /* partial_inplace */ 1413 0, /* src_mask */ 1414 0xff, /* dst_mask */ 1415 TRUE), /* pcrel_offset */ 1416 1417 /* A relative 15 bit branch. */ 1418 HOWTO (R_PPC_VLE_REL15, /* type */ 1419 1, /* rightshift */ 1420 2, /* size (0 = byte, 1 = short, 2 = long) */ 1421 15, /* bitsize */ 1422 TRUE, /* pc_relative */ 1423 1, /* bitpos */ 1424 complain_overflow_signed, /* complain_on_overflow */ 1425 bfd_elf_generic_reloc, /* special_function */ 1426 "R_PPC_VLE_REL15", /* name */ 1427 FALSE, /* partial_inplace */ 1428 0, /* src_mask */ 1429 0xfffe, /* dst_mask */ 1430 TRUE), /* pcrel_offset */ 1431 1432 /* A relative 24 bit branch. */ 1433 HOWTO (R_PPC_VLE_REL24, /* type */ 1434 1, /* rightshift */ 1435 2, /* size (0 = byte, 1 = short, 2 = long) */ 1436 24, /* bitsize */ 1437 TRUE, /* pc_relative */ 1438 1, /* bitpos */ 1439 complain_overflow_signed, /* complain_on_overflow */ 1440 bfd_elf_generic_reloc, /* special_function */ 1441 "R_PPC_VLE_REL24", /* name */ 1442 FALSE, /* partial_inplace */ 1443 0, /* src_mask */ 1444 0x1fffffe, /* dst_mask */ 1445 TRUE), /* pcrel_offset */ 1446 1447 /* The 16 LSBS in split16a format. */ 1448 HOWTO (R_PPC_VLE_LO16A, /* type */ 1449 0, /* rightshift */ 1450 2, /* size (0 = byte, 1 = short, 2 = long) */ 1451 16, /* bitsize */ 1452 FALSE, /* pc_relative */ 1453 0, /* bitpos */ 1454 complain_overflow_dont, /* complain_on_overflow */ 1455 ppc_elf_unhandled_reloc, /* special_function */ 1456 "R_PPC_VLE_LO16A", /* name */ 1457 FALSE, /* partial_inplace */ 1458 0, /* src_mask */ 1459 0x1f07ff, /* dst_mask */ 1460 FALSE), /* pcrel_offset */ 1461 1462 /* The 16 LSBS in split16d format. */ 1463 HOWTO (R_PPC_VLE_LO16D, /* type */ 1464 0, /* rightshift */ 1465 2, /* size (0 = byte, 1 = short, 2 = long) */ 1466 16, /* bitsize */ 1467 FALSE, /* pc_relative */ 1468 0, /* bitpos */ 1469 complain_overflow_dont, /* complain_on_overflow */ 1470 ppc_elf_unhandled_reloc, /* special_function */ 1471 "R_PPC_VLE_LO16D", /* name */ 1472 FALSE, /* partial_inplace */ 1473 0, /* src_mask */ 1474 0x3e007ff, /* dst_mask */ 1475 FALSE), /* pcrel_offset */ 1476 1477 /* Bits 16-31 split16a format. */ 1478 HOWTO (R_PPC_VLE_HI16A, /* type */ 1479 16, /* rightshift */ 1480 2, /* size (0 = byte, 1 = short, 2 = long) */ 1481 16, /* bitsize */ 1482 FALSE, /* pc_relative */ 1483 0, /* bitpos */ 1484 complain_overflow_dont, /* complain_on_overflow */ 1485 ppc_elf_unhandled_reloc, /* special_function */ 1486 "R_PPC_VLE_HI16A", /* name */ 1487 FALSE, /* partial_inplace */ 1488 0, /* src_mask */ 1489 0x1f07ff, /* dst_mask */ 1490 FALSE), /* pcrel_offset */ 1491 1492 /* Bits 16-31 split16d format. */ 1493 HOWTO (R_PPC_VLE_HI16D, /* type */ 1494 16, /* rightshift */ 1495 2, /* size (0 = byte, 1 = short, 2 = long) */ 1496 16, /* bitsize */ 1497 FALSE, /* pc_relative */ 1498 0, /* bitpos */ 1499 complain_overflow_dont, /* complain_on_overflow */ 1500 ppc_elf_unhandled_reloc, /* special_function */ 1501 "R_PPC_VLE_HI16D", /* name */ 1502 FALSE, /* partial_inplace */ 1503 0, /* src_mask */ 1504 0x3e007ff, /* dst_mask */ 1505 FALSE), /* pcrel_offset */ 1506 1507 /* Bits 16-31 (High Adjusted) in split16a format. */ 1508 HOWTO (R_PPC_VLE_HA16A, /* type */ 1509 16, /* rightshift */ 1510 2, /* size (0 = byte, 1 = short, 2 = long) */ 1511 16, /* bitsize */ 1512 FALSE, /* pc_relative */ 1513 0, /* bitpos */ 1514 complain_overflow_dont, /* complain_on_overflow */ 1515 ppc_elf_unhandled_reloc, /* special_function */ 1516 "R_PPC_VLE_HA16A", /* name */ 1517 FALSE, /* partial_inplace */ 1518 0, /* src_mask */ 1519 0x1f07ff, /* dst_mask */ 1520 FALSE), /* pcrel_offset */ 1521 1522 /* Bits 16-31 (High Adjusted) in split16d format. */ 1523 HOWTO (R_PPC_VLE_HA16D, /* type */ 1524 16, /* rightshift */ 1525 2, /* size (0 = byte, 1 = short, 2 = long) */ 1526 16, /* bitsize */ 1527 FALSE, /* pc_relative */ 1528 0, /* bitpos */ 1529 complain_overflow_dont, /* complain_on_overflow */ 1530 ppc_elf_unhandled_reloc, /* special_function */ 1531 "R_PPC_VLE_HA16D", /* name */ 1532 FALSE, /* partial_inplace */ 1533 0, /* src_mask */ 1534 0x3e007ff, /* dst_mask */ 1535 FALSE), /* pcrel_offset */ 1536 1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i 1538 instructions. If the register base is 0 then the linker changes 1539 the e_add16i to an e_li instruction. */ 1540 HOWTO (R_PPC_VLE_SDA21, /* type */ 1541 0, /* rightshift */ 1542 2, /* size (0 = byte, 1 = short, 2 = long) */ 1543 16, /* bitsize */ 1544 FALSE, /* pc_relative */ 1545 0, /* bitpos */ 1546 complain_overflow_signed, /* complain_on_overflow */ 1547 ppc_elf_unhandled_reloc, /* special_function */ 1548 "R_PPC_VLE_SDA21", /* name */ 1549 FALSE, /* partial_inplace */ 1550 0, /* src_mask */ 1551 0xffff, /* dst_mask */ 1552 FALSE), /* pcrel_offset */ 1553 1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */ 1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */ 1556 0, /* rightshift */ 1557 2, /* size (0 = byte, 1 = short, 2 = long) */ 1558 16, /* bitsize */ 1559 FALSE, /* pc_relative */ 1560 0, /* bitpos */ 1561 complain_overflow_dont, /* complain_on_overflow */ 1562 ppc_elf_unhandled_reloc, /* special_function */ 1563 "R_PPC_VLE_SDA21_LO", /* name */ 1564 FALSE, /* partial_inplace */ 1565 0, /* src_mask */ 1566 0xffff, /* dst_mask */ 1567 FALSE), /* pcrel_offset */ 1568 1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */ 1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */ 1571 0, /* rightshift */ 1572 2, /* size (0 = byte, 1 = short, 2 = long) */ 1573 16, /* bitsize */ 1574 FALSE, /* pc_relative */ 1575 0, /* bitpos */ 1576 complain_overflow_dont, /* complain_on_overflow */ 1577 ppc_elf_unhandled_reloc, /* special_function */ 1578 "R_PPC_VLE_SDAREL_LO16A", /* name */ 1579 FALSE, /* partial_inplace */ 1580 0, /* src_mask */ 1581 0x1f07ff, /* dst_mask */ 1582 FALSE), /* pcrel_offset */ 1583 1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */ 1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */ 1586 0, /* rightshift */ 1587 2, /* size (0 = byte, 1 = short, 2 = long) */ 1588 16, /* bitsize */ 1589 FALSE, /* pc_relative */ 1590 0, /* bitpos */ 1591 complain_overflow_dont, /* complain_on_overflow */ 1592 ppc_elf_unhandled_reloc, /* special_function */ 1593 "R_PPC_VLE_SDAREL_LO16D", /* name */ 1594 FALSE, /* partial_inplace */ 1595 0, /* src_mask */ 1596 0x3e007ff, /* dst_mask */ 1597 FALSE), /* pcrel_offset */ 1598 1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */ 1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */ 1601 16, /* rightshift */ 1602 2, /* size (0 = byte, 1 = short, 2 = long) */ 1603 16, /* bitsize */ 1604 FALSE, /* pc_relative */ 1605 0, /* bitpos */ 1606 complain_overflow_dont, /* complain_on_overflow */ 1607 ppc_elf_unhandled_reloc, /* special_function */ 1608 "R_PPC_VLE_SDAREL_HI16A", /* name */ 1609 FALSE, /* partial_inplace */ 1610 0, /* src_mask */ 1611 0x1f07ff, /* dst_mask */ 1612 FALSE), /* pcrel_offset */ 1613 1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */ 1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */ 1616 16, /* rightshift */ 1617 2, /* size (0 = byte, 1 = short, 2 = long) */ 1618 16, /* bitsize */ 1619 FALSE, /* pc_relative */ 1620 0, /* bitpos */ 1621 complain_overflow_dont, /* complain_on_overflow */ 1622 ppc_elf_unhandled_reloc, /* special_function */ 1623 "R_PPC_VLE_SDAREL_HI16D", /* name */ 1624 FALSE, /* partial_inplace */ 1625 0, /* src_mask */ 1626 0x3e007ff, /* dst_mask */ 1627 FALSE), /* pcrel_offset */ 1628 1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */ 1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */ 1631 16, /* rightshift */ 1632 2, /* size (0 = byte, 1 = short, 2 = long) */ 1633 16, /* bitsize */ 1634 FALSE, /* pc_relative */ 1635 0, /* bitpos */ 1636 complain_overflow_dont, /* complain_on_overflow */ 1637 ppc_elf_unhandled_reloc, /* special_function */ 1638 "R_PPC_VLE_SDAREL_HA16A", /* name */ 1639 FALSE, /* partial_inplace */ 1640 0, /* src_mask */ 1641 0x1f07ff, /* dst_mask */ 1642 FALSE), /* pcrel_offset */ 1643 1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */ 1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */ 1646 16, /* rightshift */ 1647 2, /* size (0 = byte, 1 = short, 2 = long) */ 1648 16, /* bitsize */ 1649 FALSE, /* pc_relative */ 1650 0, /* bitpos */ 1651 complain_overflow_dont, /* complain_on_overflow */ 1652 ppc_elf_unhandled_reloc, /* special_function */ 1653 "R_PPC_VLE_SDAREL_HA16D", /* name */ 1654 FALSE, /* partial_inplace */ 1655 0, /* src_mask */ 1656 0x3e007ff, /* dst_mask */ 1657 FALSE), /* pcrel_offset */ 1658 1659 HOWTO (R_PPC_IRELATIVE, /* type */ 1660 0, /* rightshift */ 1661 2, /* size (0 = byte, 1 = short, 2 = long) */ 1662 32, /* bitsize */ 1663 FALSE, /* pc_relative */ 1664 0, /* bitpos */ 1665 complain_overflow_dont, /* complain_on_overflow */ 1666 ppc_elf_unhandled_reloc, /* special_function */ 1667 "R_PPC_IRELATIVE", /* name */ 1668 FALSE, /* partial_inplace */ 1669 0, /* src_mask */ 1670 0xffffffff, /* dst_mask */ 1671 FALSE), /* pcrel_offset */ 1672 1673 /* A 16 bit relative relocation. */ 1674 HOWTO (R_PPC_REL16, /* type */ 1675 0, /* rightshift */ 1676 1, /* size (0 = byte, 1 = short, 2 = long) */ 1677 16, /* bitsize */ 1678 TRUE, /* pc_relative */ 1679 0, /* bitpos */ 1680 complain_overflow_signed, /* complain_on_overflow */ 1681 bfd_elf_generic_reloc, /* special_function */ 1682 "R_PPC_REL16", /* name */ 1683 FALSE, /* partial_inplace */ 1684 0, /* src_mask */ 1685 0xffff, /* dst_mask */ 1686 TRUE), /* pcrel_offset */ 1687 1688 /* A 16 bit relative relocation without overflow. */ 1689 HOWTO (R_PPC_REL16_LO, /* type */ 1690 0, /* rightshift */ 1691 1, /* size (0 = byte, 1 = short, 2 = long) */ 1692 16, /* bitsize */ 1693 TRUE, /* pc_relative */ 1694 0, /* bitpos */ 1695 complain_overflow_dont,/* complain_on_overflow */ 1696 bfd_elf_generic_reloc, /* special_function */ 1697 "R_PPC_REL16_LO", /* name */ 1698 FALSE, /* partial_inplace */ 1699 0, /* src_mask */ 1700 0xffff, /* dst_mask */ 1701 TRUE), /* pcrel_offset */ 1702 1703 /* The high order 16 bits of a relative address. */ 1704 HOWTO (R_PPC_REL16_HI, /* type */ 1705 16, /* rightshift */ 1706 1, /* size (0 = byte, 1 = short, 2 = long) */ 1707 16, /* bitsize */ 1708 TRUE, /* pc_relative */ 1709 0, /* bitpos */ 1710 complain_overflow_dont, /* complain_on_overflow */ 1711 bfd_elf_generic_reloc, /* special_function */ 1712 "R_PPC_REL16_HI", /* name */ 1713 FALSE, /* partial_inplace */ 1714 0, /* src_mask */ 1715 0xffff, /* dst_mask */ 1716 TRUE), /* pcrel_offset */ 1717 1718 /* The high order 16 bits of a relative address, plus 1 if the contents of 1719 the low 16 bits, treated as a signed number, is negative. */ 1720 HOWTO (R_PPC_REL16_HA, /* type */ 1721 16, /* rightshift */ 1722 1, /* size (0 = byte, 1 = short, 2 = long) */ 1723 16, /* bitsize */ 1724 TRUE, /* pc_relative */ 1725 0, /* bitpos */ 1726 complain_overflow_dont, /* complain_on_overflow */ 1727 ppc_elf_addr16_ha_reloc, /* special_function */ 1728 "R_PPC_REL16_HA", /* name */ 1729 FALSE, /* partial_inplace */ 1730 0, /* src_mask */ 1731 0xffff, /* dst_mask */ 1732 TRUE), /* pcrel_offset */ 1733 1734 /* Like R_PPC_REL16_HA but for split field in addpcis. */ 1735 HOWTO (R_PPC_REL16DX_HA, /* type */ 1736 16, /* rightshift */ 1737 2, /* size (0 = byte, 1 = short, 2 = long) */ 1738 16, /* bitsize */ 1739 TRUE, /* pc_relative */ 1740 0, /* bitpos */ 1741 complain_overflow_signed, /* complain_on_overflow */ 1742 ppc_elf_addr16_ha_reloc, /* special_function */ 1743 "R_PPC_REL16DX_HA", /* name */ 1744 FALSE, /* partial_inplace */ 1745 0, /* src_mask */ 1746 0x1fffc1, /* dst_mask */ 1747 TRUE), /* pcrel_offset */ 1748 1749 /* A split-field reloc for addpcis, non-relative (gas internal use only). */ 1750 HOWTO (R_PPC_16DX_HA, /* type */ 1751 16, /* rightshift */ 1752 2, /* size (0 = byte, 1 = short, 2 = long) */ 1753 16, /* bitsize */ 1754 FALSE, /* pc_relative */ 1755 0, /* bitpos */ 1756 complain_overflow_signed, /* complain_on_overflow */ 1757 ppc_elf_addr16_ha_reloc, /* special_function */ 1758 "R_PPC_16DX_HA", /* name */ 1759 FALSE, /* partial_inplace */ 1760 0, /* src_mask */ 1761 0x1fffc1, /* dst_mask */ 1762 FALSE), /* pcrel_offset */ 1763 1764 /* GNU extension to record C++ vtable hierarchy. */ 1765 HOWTO (R_PPC_GNU_VTINHERIT, /* type */ 1766 0, /* rightshift */ 1767 0, /* size (0 = byte, 1 = short, 2 = long) */ 1768 0, /* bitsize */ 1769 FALSE, /* pc_relative */ 1770 0, /* bitpos */ 1771 complain_overflow_dont, /* complain_on_overflow */ 1772 NULL, /* special_function */ 1773 "R_PPC_GNU_VTINHERIT", /* name */ 1774 FALSE, /* partial_inplace */ 1775 0, /* src_mask */ 1776 0, /* dst_mask */ 1777 FALSE), /* pcrel_offset */ 1778 1779 /* GNU extension to record C++ vtable member usage. */ 1780 HOWTO (R_PPC_GNU_VTENTRY, /* type */ 1781 0, /* rightshift */ 1782 0, /* size (0 = byte, 1 = short, 2 = long) */ 1783 0, /* bitsize */ 1784 FALSE, /* pc_relative */ 1785 0, /* bitpos */ 1786 complain_overflow_dont, /* complain_on_overflow */ 1787 NULL, /* special_function */ 1788 "R_PPC_GNU_VTENTRY", /* name */ 1789 FALSE, /* partial_inplace */ 1790 0, /* src_mask */ 1791 0, /* dst_mask */ 1792 FALSE), /* pcrel_offset */ 1793 1794 /* Phony reloc to handle AIX style TOC entries. */ 1795 HOWTO (R_PPC_TOC16, /* type */ 1796 0, /* rightshift */ 1797 1, /* size (0 = byte, 1 = short, 2 = long) */ 1798 16, /* bitsize */ 1799 FALSE, /* pc_relative */ 1800 0, /* bitpos */ 1801 complain_overflow_signed, /* complain_on_overflow */ 1802 ppc_elf_unhandled_reloc, /* special_function */ 1803 "R_PPC_TOC16", /* name */ 1804 FALSE, /* partial_inplace */ 1805 0, /* src_mask */ 1806 0xffff, /* dst_mask */ 1807 FALSE), /* pcrel_offset */ 1808}; 1809 1810/* External 32-bit PPC structure for PRPSINFO. This structure is 1811 ABI-defined, thus we choose to use char arrays here in order to 1812 avoid dealing with different types in different architectures. 1813 1814 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while 1815 most non-PPC architectures use `short int'. 1816 1817 This structure will ultimately be written in the corefile's note 1818 section, as the PRPSINFO. */ 1819 1820struct elf_external_ppc_linux_prpsinfo32 1821 { 1822 char pr_state; /* Numeric process state. */ 1823 char pr_sname; /* Char for pr_state. */ 1824 char pr_zomb; /* Zombie. */ 1825 char pr_nice; /* Nice val. */ 1826 char pr_flag[4]; /* Flags. */ 1827 char pr_uid[4]; 1828 char pr_gid[4]; 1829 char pr_pid[4]; 1830 char pr_ppid[4]; 1831 char pr_pgrp[4]; 1832 char pr_sid[4]; 1833 char pr_fname[16]; /* Filename of executable. */ 1834 char pr_psargs[80]; /* Initial part of arg list. */ 1835 }; 1836 1837/* Helper function to copy an elf_internal_linux_prpsinfo in host 1838 endian to an elf_external_ppc_linux_prpsinfo32 in target endian. */ 1839 1840static inline void 1841swap_ppc_linux_prpsinfo32_out (bfd *obfd, 1842 const struct elf_internal_linux_prpsinfo *from, 1843 struct elf_external_ppc_linux_prpsinfo32 *to) 1844{ 1845 bfd_put_8 (obfd, from->pr_state, &to->pr_state); 1846 bfd_put_8 (obfd, from->pr_sname, &to->pr_sname); 1847 bfd_put_8 (obfd, from->pr_zomb, &to->pr_zomb); 1848 bfd_put_8 (obfd, from->pr_nice, &to->pr_nice); 1849 bfd_put_32 (obfd, from->pr_flag, to->pr_flag); 1850 bfd_put_32 (obfd, from->pr_uid, to->pr_uid); 1851 bfd_put_32 (obfd, from->pr_gid, to->pr_gid); 1852 bfd_put_32 (obfd, from->pr_pid, to->pr_pid); 1853 bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid); 1854 bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp); 1855 bfd_put_32 (obfd, from->pr_sid, to->pr_sid); 1856 strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname)); 1857 strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs)); 1858} 1859 1860/* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ 1861 1862static void 1863ppc_elf_howto_init (void) 1864{ 1865 unsigned int i, type; 1866 1867 for (i = 0; 1868 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); 1869 i++) 1870 { 1871 type = ppc_elf_howto_raw[i].type; 1872 if (type >= (sizeof (ppc_elf_howto_table) 1873 / sizeof (ppc_elf_howto_table[0]))) 1874 abort (); 1875 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; 1876 } 1877} 1878 1879static reloc_howto_type * 1880ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1881 bfd_reloc_code_real_type code) 1882{ 1883 enum elf_ppc_reloc_type r; 1884 1885 /* Initialize howto table if not already done. */ 1886 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 1887 ppc_elf_howto_init (); 1888 1889 switch (code) 1890 { 1891 default: 1892 return NULL; 1893 1894 case BFD_RELOC_NONE: r = R_PPC_NONE; break; 1895 case BFD_RELOC_32: r = R_PPC_ADDR32; break; 1896 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; 1897 case BFD_RELOC_PPC64_ADDR16_DS: 1898 case BFD_RELOC_16: r = R_PPC_ADDR16; break; 1899 case BFD_RELOC_PPC64_ADDR16_LO_DS: 1900 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; 1901 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; 1902 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; 1903 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break; 1904 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break; 1905 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break; 1906 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break; 1907 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; 1908 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; 1909 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; 1910 case BFD_RELOC_PPC64_GOT16_DS: 1911 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; 1912 case BFD_RELOC_PPC64_GOT16_LO_DS: 1913 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; 1914 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; 1915 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; 1916 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break; 1917 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break; 1918 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break; 1919 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break; 1920 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; 1921 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; 1922 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; 1923 case BFD_RELOC_PPC64_PLT16_LO_DS: 1924 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; 1925 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; 1926 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; 1927 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; 1928 case BFD_RELOC_PPC64_SECTOFF_DS: 1929 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; 1930 case BFD_RELOC_PPC64_SECTOFF_LO_DS: 1931 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; 1932 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; 1933 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; 1934 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; 1935 case BFD_RELOC_PPC64_TOC16_DS: 1936 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; 1937 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; 1938 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break; 1939 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break; 1940 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; 1941 case BFD_RELOC_PPC64_TPREL16_DS: 1942 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; 1943 case BFD_RELOC_PPC64_TPREL16_LO_DS: 1944 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; 1945 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; 1946 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; 1947 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; 1948 case BFD_RELOC_PPC64_DTPREL16_DS: 1949 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; 1950 case BFD_RELOC_PPC64_DTPREL16_LO_DS: 1951 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; 1952 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; 1953 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; 1954 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break; 1955 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break; 1956 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break; 1957 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break; 1958 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break; 1959 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break; 1960 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break; 1961 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break; 1962 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break; 1963 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break; 1964 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break; 1965 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break; 1966 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break; 1967 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break; 1968 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break; 1969 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break; 1970 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break; 1971 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break; 1972 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break; 1973 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break; 1974 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break; 1975 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break; 1976 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break; 1977 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break; 1978 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break; 1979 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break; 1980 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break; 1981 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break; 1982 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break; 1983 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break; 1984 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break; 1985 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break; 1986 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break; 1987 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break; 1988 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break; 1989 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break; 1990 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break; 1991 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break; 1992 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break; 1993 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break; 1994 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break; 1995 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break; 1996 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break; 1997 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break; 1998 case BFD_RELOC_PPC_VLE_SDAREL_LO16A: 1999 r = R_PPC_VLE_SDAREL_LO16A; 2000 break; 2001 case BFD_RELOC_PPC_VLE_SDAREL_LO16D: 2002 r = R_PPC_VLE_SDAREL_LO16D; 2003 break; 2004 case BFD_RELOC_PPC_VLE_SDAREL_HI16A: 2005 r = R_PPC_VLE_SDAREL_HI16A; 2006 break; 2007 case BFD_RELOC_PPC_VLE_SDAREL_HI16D: 2008 r = R_PPC_VLE_SDAREL_HI16D; 2009 break; 2010 case BFD_RELOC_PPC_VLE_SDAREL_HA16A: 2011 r = R_PPC_VLE_SDAREL_HA16A; 2012 break; 2013 case BFD_RELOC_PPC_VLE_SDAREL_HA16D: 2014 r = R_PPC_VLE_SDAREL_HA16D; 2015 break; 2016 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break; 2017 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break; 2018 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break; 2019 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break; 2020 case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break; 2021 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break; 2022 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break; 2023 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break; 2024 } 2025 2026 return ppc_elf_howto_table[r]; 2027}; 2028 2029static reloc_howto_type * 2030ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 2031 const char *r_name) 2032{ 2033 unsigned int i; 2034 2035 for (i = 0; 2036 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); 2037 i++) 2038 if (ppc_elf_howto_raw[i].name != NULL 2039 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0) 2040 return &ppc_elf_howto_raw[i]; 2041 2042 return NULL; 2043} 2044 2045/* Set the howto pointer for a PowerPC ELF reloc. */ 2046 2047static void 2048ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 2049 arelent *cache_ptr, 2050 Elf_Internal_Rela *dst) 2051{ 2052 unsigned int r_type; 2053 2054 /* Initialize howto table if not already done. */ 2055 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 2056 ppc_elf_howto_init (); 2057 2058 r_type = ELF32_R_TYPE (dst->r_info); 2059 if (r_type >= R_PPC_max) 2060 { 2061 /* xgettext:c-format */ 2062 _bfd_error_handler (_("%B: unrecognised PPC reloc number: %d"), 2063 abfd, r_type); 2064 bfd_set_error (bfd_error_bad_value); 2065 r_type = R_PPC_NONE; 2066 } 2067 cache_ptr->howto = ppc_elf_howto_table[r_type]; 2068 2069 /* Just because the above assert didn't trigger doesn't mean that 2070 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */ 2071 if (!cache_ptr->howto) 2072 { 2073 /* xgettext:c-format */ 2074 _bfd_error_handler (_("%B: invalid relocation type %d"), 2075 abfd, r_type); 2076 bfd_set_error (bfd_error_bad_value); 2077 2078 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE]; 2079 } 2080} 2081 2082/* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */ 2083 2084static bfd_reloc_status_type 2085ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED, 2086 arelent *reloc_entry, 2087 asymbol *symbol, 2088 void *data ATTRIBUTE_UNUSED, 2089 asection *input_section, 2090 bfd *output_bfd, 2091 char **error_message ATTRIBUTE_UNUSED) 2092{ 2093 enum elf_ppc_reloc_type r_type; 2094 long insn; 2095 bfd_size_type octets; 2096 bfd_vma value; 2097 2098 if (output_bfd != NULL) 2099 { 2100 reloc_entry->address += input_section->output_offset; 2101 return bfd_reloc_ok; 2102 } 2103 2104 reloc_entry->addend += 0x8000; 2105 r_type = reloc_entry->howto->type; 2106 if (r_type != R_PPC_REL16DX_HA) 2107 return bfd_reloc_continue; 2108 2109 value = 0; 2110 if (!bfd_is_com_section (symbol->section)) 2111 value = symbol->value; 2112 value += (reloc_entry->addend 2113 + symbol->section->output_offset 2114 + symbol->section->output_section->vma); 2115 value -= (reloc_entry->address 2116 + input_section->output_offset 2117 + input_section->output_section->vma); 2118 value >>= 16; 2119 2120 octets = reloc_entry->address * bfd_octets_per_byte (abfd); 2121 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); 2122 insn &= ~0x1fffc1; 2123 insn |= (value & 0xffc1) | ((value & 0x3e) << 15); 2124 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); 2125 return bfd_reloc_ok; 2126} 2127 2128static bfd_reloc_status_type 2129ppc_elf_unhandled_reloc (bfd *abfd, 2130 arelent *reloc_entry, 2131 asymbol *symbol, 2132 void *data, 2133 asection *input_section, 2134 bfd *output_bfd, 2135 char **error_message) 2136{ 2137 /* If this is a relocatable link (output_bfd test tells us), just 2138 call the generic function. Any adjustment will be done at final 2139 link time. */ 2140 if (output_bfd != NULL) 2141 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2142 input_section, output_bfd, error_message); 2143 2144 if (error_message != NULL) 2145 { 2146 static char buf[60]; 2147 sprintf (buf, _("generic linker can't handle %s"), 2148 reloc_entry->howto->name); 2149 *error_message = buf; 2150 } 2151 return bfd_reloc_dangerous; 2152} 2153 2154/* Sections created by the linker. */ 2155 2156typedef struct elf_linker_section 2157{ 2158 /* Pointer to the bfd section. */ 2159 asection *section; 2160 /* Section name. */ 2161 const char *name; 2162 /* Associated bss section name. */ 2163 const char *bss_name; 2164 /* Associated symbol name. */ 2165 const char *sym_name; 2166 /* Associated symbol. */ 2167 struct elf_link_hash_entry *sym; 2168} elf_linker_section_t; 2169 2170/* Linked list of allocated pointer entries. This hangs off of the 2171 symbol lists, and provides allows us to return different pointers, 2172 based on different addend's. */ 2173 2174typedef struct elf_linker_section_pointers 2175{ 2176 /* next allocated pointer for this symbol */ 2177 struct elf_linker_section_pointers *next; 2178 /* offset of pointer from beginning of section */ 2179 bfd_vma offset; 2180 /* addend used */ 2181 bfd_vma addend; 2182 /* which linker section this is */ 2183 elf_linker_section_t *lsect; 2184} elf_linker_section_pointers_t; 2185 2186struct ppc_elf_obj_tdata 2187{ 2188 struct elf_obj_tdata elf; 2189 2190 /* A mapping from local symbols to offsets into the various linker 2191 sections added. This is index by the symbol index. */ 2192 elf_linker_section_pointers_t **linker_section_pointers; 2193 2194 /* Flags used to auto-detect plt type. */ 2195 unsigned int makes_plt_call : 1; 2196 unsigned int has_rel16 : 1; 2197}; 2198 2199#define ppc_elf_tdata(bfd) \ 2200 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any) 2201 2202#define elf_local_ptr_offsets(bfd) \ 2203 (ppc_elf_tdata (bfd)->linker_section_pointers) 2204 2205#define is_ppc_elf(bfd) \ 2206 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 2207 && elf_object_id (bfd) == PPC32_ELF_DATA) 2208 2209/* Override the generic function because we store some extras. */ 2210 2211static bfd_boolean 2212ppc_elf_mkobject (bfd *abfd) 2213{ 2214 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata), 2215 PPC32_ELF_DATA); 2216} 2217 2218/* When defaulting arch/mach, decode apuinfo to find a better match. */ 2219 2220bfd_boolean 2221_bfd_elf_ppc_set_arch (bfd *abfd) 2222{ 2223 unsigned long mach = 0; 2224 asection *s; 2225 unsigned char *contents; 2226 2227 if (abfd->arch_info->bits_per_word == 32 2228 && bfd_big_endian (abfd)) 2229 { 2230 2231 for (s = abfd->sections; s != NULL; s = s->next) 2232 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0) 2233 break; 2234 if (s != NULL) 2235 mach = bfd_mach_ppc_vle; 2236 } 2237 2238 if (mach == 0) 2239 { 2240 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2241 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents)) 2242 { 2243 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4); 2244 unsigned int i; 2245 2246 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4) 2247 { 2248 unsigned int val = bfd_get_32 (abfd, contents + i); 2249 switch (val >> 16) 2250 { 2251 case PPC_APUINFO_PMR: 2252 case PPC_APUINFO_RFMCI: 2253 if (mach == 0) 2254 mach = bfd_mach_ppc_titan; 2255 break; 2256 2257 case PPC_APUINFO_ISEL: 2258 case PPC_APUINFO_CACHELCK: 2259 if (mach == bfd_mach_ppc_titan) 2260 mach = bfd_mach_ppc_e500mc; 2261 break; 2262 2263 case PPC_APUINFO_SPE: 2264 case PPC_APUINFO_EFS: 2265 case PPC_APUINFO_BRLOCK: 2266 if (mach != bfd_mach_ppc_vle) 2267 mach = bfd_mach_ppc_e500; 2268 break; 2269 2270 case PPC_APUINFO_VLE: 2271 mach = bfd_mach_ppc_vle; 2272 break; 2273 2274 default: 2275 mach = -1ul; 2276 } 2277 } 2278 free (contents); 2279 } 2280 } 2281 2282 if (mach != 0 && mach != -1ul) 2283 { 2284 const bfd_arch_info_type *arch; 2285 2286 for (arch = abfd->arch_info->next; arch; arch = arch->next) 2287 if (arch->mach == mach) 2288 { 2289 abfd->arch_info = arch; 2290 break; 2291 } 2292 } 2293 return TRUE; 2294} 2295 2296/* Fix bad default arch selected for a 32 bit input bfd when the 2297 default is 64 bit. Also select arch based on apuinfo. */ 2298 2299static bfd_boolean 2300ppc_elf_object_p (bfd *abfd) 2301{ 2302 if (!abfd->arch_info->the_default) 2303 return TRUE; 2304 2305 if (abfd->arch_info->bits_per_word == 64) 2306 { 2307 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); 2308 2309 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32) 2310 { 2311 /* Relies on arch after 64 bit default being 32 bit default. */ 2312 abfd->arch_info = abfd->arch_info->next; 2313 BFD_ASSERT (abfd->arch_info->bits_per_word == 32); 2314 } 2315 } 2316 return _bfd_elf_ppc_set_arch (abfd); 2317} 2318 2319/* Function to set whether a module needs the -mrelocatable bit set. */ 2320 2321static bfd_boolean 2322ppc_elf_set_private_flags (bfd *abfd, flagword flags) 2323{ 2324 BFD_ASSERT (!elf_flags_init (abfd) 2325 || elf_elfheader (abfd)->e_flags == flags); 2326 2327 elf_elfheader (abfd)->e_flags = flags; 2328 elf_flags_init (abfd) = TRUE; 2329 return TRUE; 2330} 2331 2332/* Support for core dump NOTE sections. */ 2333 2334static bfd_boolean 2335ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 2336{ 2337 int offset; 2338 unsigned int size; 2339 2340 switch (note->descsz) 2341 { 2342 default: 2343 return FALSE; 2344 2345 case 268: /* Linux/PPC. */ 2346 /* pr_cursig */ 2347 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 2348 2349 /* pr_pid */ 2350 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); 2351 2352 /* pr_reg */ 2353 offset = 72; 2354 size = 192; 2355 2356 break; 2357 } 2358 2359 /* Make a ".reg/999" section. */ 2360 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 2361 size, note->descpos + offset); 2362} 2363 2364static bfd_boolean 2365ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 2366{ 2367 switch (note->descsz) 2368 { 2369 default: 2370 return FALSE; 2371 2372 case 128: /* Linux/PPC elf_prpsinfo. */ 2373 elf_tdata (abfd)->core->pid 2374 = bfd_get_32 (abfd, note->descdata + 16); 2375 elf_tdata (abfd)->core->program 2376 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); 2377 elf_tdata (abfd)->core->command 2378 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); 2379 } 2380 2381 /* Note that for some reason, a spurious space is tacked 2382 onto the end of the args in some (at least one anyway) 2383 implementations, so strip it off if it exists. */ 2384 2385 { 2386 char *command = elf_tdata (abfd)->core->command; 2387 int n = strlen (command); 2388 2389 if (0 < n && command[n - 1] == ' ') 2390 command[n - 1] = '\0'; 2391 } 2392 2393 return TRUE; 2394} 2395 2396char * 2397elfcore_write_ppc_linux_prpsinfo32 2398 (bfd *abfd, 2399 char *buf, 2400 int *bufsiz, 2401 const struct elf_internal_linux_prpsinfo *prpsinfo) 2402{ 2403 struct elf_external_ppc_linux_prpsinfo32 data; 2404 2405 swap_ppc_linux_prpsinfo32_out (abfd, prpsinfo, &data); 2406 return elfcore_write_note (abfd, buf, bufsiz, 2407 "CORE", NT_PRPSINFO, &data, sizeof (data)); 2408} 2409 2410static char * 2411ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...) 2412{ 2413 switch (note_type) 2414 { 2415 default: 2416 return NULL; 2417 2418 case NT_PRPSINFO: 2419 { 2420 char data[128]; 2421 va_list ap; 2422 2423 va_start (ap, note_type); 2424 memset (data, 0, sizeof (data)); 2425 strncpy (data + 32, va_arg (ap, const char *), 16); 2426 strncpy (data + 48, va_arg (ap, const char *), 80); 2427 va_end (ap); 2428 return elfcore_write_note (abfd, buf, bufsiz, 2429 "CORE", note_type, data, sizeof (data)); 2430 } 2431 2432 case NT_PRSTATUS: 2433 { 2434 char data[268]; 2435 va_list ap; 2436 long pid; 2437 int cursig; 2438 const void *greg; 2439 2440 va_start (ap, note_type); 2441 memset (data, 0, 72); 2442 pid = va_arg (ap, long); 2443 bfd_put_32 (abfd, pid, data + 24); 2444 cursig = va_arg (ap, int); 2445 bfd_put_16 (abfd, cursig, data + 12); 2446 greg = va_arg (ap, const void *); 2447 memcpy (data + 72, greg, 192); 2448 memset (data + 264, 0, 4); 2449 va_end (ap); 2450 return elfcore_write_note (abfd, buf, bufsiz, 2451 "CORE", note_type, data, sizeof (data)); 2452 } 2453 } 2454} 2455 2456static flagword 2457ppc_elf_lookup_section_flags (char *flag_name) 2458{ 2459 2460 if (!strcmp (flag_name, "SHF_PPC_VLE")) 2461 return SHF_PPC_VLE; 2462 2463 return 0; 2464} 2465 2466/* Return address for Ith PLT stub in section PLT, for relocation REL 2467 or (bfd_vma) -1 if it should not be included. */ 2468 2469static bfd_vma 2470ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, 2471 const asection *plt ATTRIBUTE_UNUSED, 2472 const arelent *rel) 2473{ 2474 return rel->address; 2475} 2476 2477/* Handle a PowerPC specific section when reading an object file. This 2478 is called when bfd_section_from_shdr finds a section with an unknown 2479 type. */ 2480 2481static bfd_boolean 2482ppc_elf_section_from_shdr (bfd *abfd, 2483 Elf_Internal_Shdr *hdr, 2484 const char *name, 2485 int shindex) 2486{ 2487 asection *newsect; 2488 flagword flags; 2489 2490 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) 2491 return FALSE; 2492 2493 newsect = hdr->bfd_section; 2494 flags = bfd_get_section_flags (abfd, newsect); 2495 if (hdr->sh_flags & SHF_EXCLUDE) 2496 flags |= SEC_EXCLUDE; 2497 2498 if (hdr->sh_type == SHT_ORDERED) 2499 flags |= SEC_SORT_ENTRIES; 2500 2501 bfd_set_section_flags (abfd, newsect, flags); 2502 return TRUE; 2503} 2504 2505/* Set up any other section flags and such that may be necessary. */ 2506 2507static bfd_boolean 2508ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, 2509 Elf_Internal_Shdr *shdr, 2510 asection *asect) 2511{ 2512 if ((asect->flags & SEC_SORT_ENTRIES) != 0) 2513 shdr->sh_type = SHT_ORDERED; 2514 2515 return TRUE; 2516} 2517 2518/* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we 2519 need to bump up the number of section headers. */ 2520 2521static int 2522ppc_elf_additional_program_headers (bfd *abfd, 2523 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2524{ 2525 asection *s; 2526 int ret = 0; 2527 2528 s = bfd_get_section_by_name (abfd, ".sbss2"); 2529 if (s != NULL && (s->flags & SEC_ALLOC) != 0) 2530 ++ret; 2531 2532 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); 2533 if (s != NULL && (s->flags & SEC_ALLOC) != 0) 2534 ++ret; 2535 2536 return ret; 2537} 2538 2539/* Modify the segment map for VLE executables. */ 2540 2541bfd_boolean 2542ppc_elf_modify_segment_map (bfd *abfd, 2543 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2544{ 2545 struct elf_segment_map *m; 2546 2547 /* At this point in the link, output sections have already been sorted by 2548 LMA and assigned to segments. All that is left to do is to ensure 2549 there is no mixing of VLE & non-VLE sections in a text segment. 2550 If we find that case, we split the segment. 2551 We maintain the original output section order. */ 2552 2553 for (m = elf_seg_map (abfd); m != NULL; m = m->next) 2554 { 2555 struct elf_segment_map *n; 2556 bfd_size_type amt; 2557 unsigned int j, k; 2558 unsigned int p_flags; 2559 2560 if (m->p_type != PT_LOAD || m->count == 0) 2561 continue; 2562 2563 for (p_flags = PF_R, j = 0; j != m->count; ++j) 2564 { 2565 if ((m->sections[j]->flags & SEC_READONLY) == 0) 2566 p_flags |= PF_W; 2567 if ((m->sections[j]->flags & SEC_CODE) != 0) 2568 { 2569 p_flags |= PF_X; 2570 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0) 2571 p_flags |= PF_PPC_VLE; 2572 break; 2573 } 2574 } 2575 if (j != m->count) 2576 while (++j != m->count) 2577 { 2578 unsigned int p_flags1 = PF_R; 2579 2580 if ((m->sections[j]->flags & SEC_READONLY) == 0) 2581 p_flags1 |= PF_W; 2582 if ((m->sections[j]->flags & SEC_CODE) != 0) 2583 { 2584 p_flags1 |= PF_X; 2585 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0) 2586 p_flags1 |= PF_PPC_VLE; 2587 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0) 2588 break; 2589 } 2590 p_flags |= p_flags1; 2591 } 2592 /* If we're splitting a segment which originally contained rw 2593 sections then those sections might now only be in one of the 2594 two parts. So always set p_flags if splitting, even if we 2595 are being called for objcopy with p_flags_valid set. */ 2596 if (j != m->count || !m->p_flags_valid) 2597 { 2598 m->p_flags_valid = 1; 2599 m->p_flags = p_flags; 2600 } 2601 if (j == m->count) 2602 continue; 2603 2604 /* Sections 0..j-1 stay in this (current) segment, 2605 the remainder are put in a new segment. 2606 The scan resumes with the new segment. */ 2607 2608 amt = sizeof (struct elf_segment_map); 2609 amt += (m->count - j - 1) * sizeof (asection *); 2610 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt); 2611 if (n == NULL) 2612 return FALSE; 2613 2614 n->p_type = PT_LOAD; 2615 n->count = m->count - j; 2616 for (k = 0; k < n->count; ++k) 2617 n->sections[k] = m->sections[j + k]; 2618 m->count = j; 2619 m->p_size_valid = 0; 2620 n->next = m->next; 2621 m->next = n; 2622 } 2623 2624 return TRUE; 2625} 2626 2627/* Add extra PPC sections -- Note, for now, make .sbss2 and 2628 .PPC.EMB.sbss0 a normal section, and not a bss section so 2629 that the linker doesn't crater when trying to make more than 2630 2 sections. */ 2631 2632static const struct bfd_elf_special_section ppc_elf_special_sections[] = 2633{ 2634 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR }, 2635 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 2636 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC }, 2637 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 2638 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC }, 2639 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC }, 2640 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 }, 2641 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC }, 2642 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC }, 2643 { NULL, 0, 0, 0, 0 } 2644}; 2645 2646/* This is what we want for new plt/got. */ 2647static struct bfd_elf_special_section ppc_alt_plt = 2648 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC }; 2649 2650static const struct bfd_elf_special_section * 2651ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) 2652{ 2653 const struct bfd_elf_special_section *ssect; 2654 2655 /* See if this is one of the special sections. */ 2656 if (sec->name == NULL) 2657 return NULL; 2658 2659 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections, 2660 sec->use_rela_p); 2661 if (ssect != NULL) 2662 { 2663 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0) 2664 ssect = &ppc_alt_plt; 2665 return ssect; 2666 } 2667 2668 return _bfd_elf_get_sec_type_attr (abfd, sec); 2669} 2670 2671/* Very simple linked list structure for recording apuinfo values. */ 2672typedef struct apuinfo_list 2673{ 2674 struct apuinfo_list *next; 2675 unsigned long value; 2676} 2677apuinfo_list; 2678 2679static apuinfo_list *head; 2680static bfd_boolean apuinfo_set; 2681 2682static void 2683apuinfo_list_init (void) 2684{ 2685 head = NULL; 2686 apuinfo_set = FALSE; 2687} 2688 2689static void 2690apuinfo_list_add (unsigned long value) 2691{ 2692 apuinfo_list *entry = head; 2693 2694 while (entry != NULL) 2695 { 2696 if (entry->value == value) 2697 return; 2698 entry = entry->next; 2699 } 2700 2701 entry = bfd_malloc (sizeof (* entry)); 2702 if (entry == NULL) 2703 return; 2704 2705 entry->value = value; 2706 entry->next = head; 2707 head = entry; 2708} 2709 2710static unsigned 2711apuinfo_list_length (void) 2712{ 2713 apuinfo_list *entry; 2714 unsigned long count; 2715 2716 for (entry = head, count = 0; 2717 entry; 2718 entry = entry->next) 2719 ++ count; 2720 2721 return count; 2722} 2723 2724static inline unsigned long 2725apuinfo_list_element (unsigned long number) 2726{ 2727 apuinfo_list * entry; 2728 2729 for (entry = head; 2730 entry && number --; 2731 entry = entry->next) 2732 ; 2733 2734 return entry ? entry->value : 0; 2735} 2736 2737static void 2738apuinfo_list_finish (void) 2739{ 2740 apuinfo_list *entry; 2741 2742 for (entry = head; entry;) 2743 { 2744 apuinfo_list *next = entry->next; 2745 free (entry); 2746 entry = next; 2747 } 2748 2749 head = NULL; 2750} 2751 2752/* Scan the input BFDs and create a linked list of 2753 the APUinfo values that will need to be emitted. */ 2754 2755static void 2756ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info) 2757{ 2758 bfd *ibfd; 2759 asection *asec; 2760 char *buffer = NULL; 2761 bfd_size_type largest_input_size = 0; 2762 unsigned i; 2763 unsigned long length; 2764 const char *error_message = NULL; 2765 2766 if (link_info == NULL) 2767 return; 2768 2769 apuinfo_list_init (); 2770 2771 /* Read in the input sections contents. */ 2772 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next) 2773 { 2774 unsigned long datum; 2775 2776 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); 2777 if (asec == NULL) 2778 continue; 2779 2780 /* xgettext:c-format */ 2781 error_message = _("corrupt %s section in %B"); 2782 length = asec->size; 2783 if (length < 20) 2784 goto fail; 2785 2786 apuinfo_set = TRUE; 2787 if (largest_input_size < asec->size) 2788 { 2789 if (buffer) 2790 free (buffer); 2791 largest_input_size = asec->size; 2792 buffer = bfd_malloc (largest_input_size); 2793 if (!buffer) 2794 return; 2795 } 2796 2797 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0 2798 || (bfd_bread (buffer, length, ibfd) != length)) 2799 { 2800 /* xgettext:c-format */ 2801 error_message = _("unable to read in %s section from %B"); 2802 goto fail; 2803 } 2804 2805 /* Verify the contents of the header. Note - we have to 2806 extract the values this way in order to allow for a 2807 host whose endian-ness is different from the target. */ 2808 datum = bfd_get_32 (ibfd, buffer); 2809 if (datum != sizeof APUINFO_LABEL) 2810 goto fail; 2811 2812 datum = bfd_get_32 (ibfd, buffer + 8); 2813 if (datum != 0x2) 2814 goto fail; 2815 2816 if (strcmp (buffer + 12, APUINFO_LABEL) != 0) 2817 goto fail; 2818 2819 /* Get the number of bytes used for apuinfo entries. */ 2820 datum = bfd_get_32 (ibfd, buffer + 4); 2821 if (datum + 20 != length) 2822 goto fail; 2823 2824 /* Scan the apuinfo section, building a list of apuinfo numbers. */ 2825 for (i = 0; i < datum; i += 4) 2826 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i)); 2827 } 2828 2829 error_message = NULL; 2830 2831 if (apuinfo_set) 2832 { 2833 /* Compute the size of the output section. */ 2834 unsigned num_entries = apuinfo_list_length (); 2835 2836 /* Set the output section size, if it exists. */ 2837 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2838 2839 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4)) 2840 { 2841 ibfd = abfd; 2842 /* xgettext:c-format */ 2843 error_message = _("warning: unable to set size of %s section in %B"); 2844 } 2845 } 2846 2847 fail: 2848 if (buffer) 2849 free (buffer); 2850 2851 if (error_message) 2852 _bfd_error_handler (error_message, ibfd, APUINFO_SECTION_NAME); 2853} 2854 2855/* Prevent the output section from accumulating the input sections' 2856 contents. We have already stored this in our linked list structure. */ 2857 2858static bfd_boolean 2859ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED, 2860 struct bfd_link_info *link_info ATTRIBUTE_UNUSED, 2861 asection *asec, 2862 bfd_byte *contents ATTRIBUTE_UNUSED) 2863{ 2864 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0; 2865} 2866 2867/* Finally we can generate the output section. */ 2868 2869static void 2870ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) 2871{ 2872 bfd_byte *buffer; 2873 asection *asec; 2874 unsigned i; 2875 unsigned num_entries; 2876 bfd_size_type length; 2877 2878 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2879 if (asec == NULL) 2880 return; 2881 2882 if (!apuinfo_set) 2883 return; 2884 2885 length = asec->size; 2886 if (length < 20) 2887 return; 2888 2889 buffer = bfd_malloc (length); 2890 if (buffer == NULL) 2891 { 2892 _bfd_error_handler 2893 (_("failed to allocate space for new APUinfo section.")); 2894 return; 2895 } 2896 2897 /* Create the apuinfo header. */ 2898 num_entries = apuinfo_list_length (); 2899 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer); 2900 bfd_put_32 (abfd, num_entries * 4, buffer + 4); 2901 bfd_put_32 (abfd, 0x2, buffer + 8); 2902 strcpy ((char *) buffer + 12, APUINFO_LABEL); 2903 2904 length = 20; 2905 for (i = 0; i < num_entries; i++) 2906 { 2907 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length); 2908 length += 4; 2909 } 2910 2911 if (length != asec->size) 2912 _bfd_error_handler (_("failed to compute new APUinfo section.")); 2913 2914 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length)) 2915 _bfd_error_handler (_("failed to install new APUinfo section.")); 2916 2917 free (buffer); 2918 2919 apuinfo_list_finish (); 2920} 2921 2922static bfd_boolean 2923is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off) 2924{ 2925 bfd_byte buf[GLINK_ENTRY_SIZE]; 2926 2927 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE)) 2928 return FALSE; 2929 2930 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11 2931 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11 2932 && bfd_get_32 (abfd, buf + 8) == MTCTR_11 2933 && bfd_get_32 (abfd, buf + 12) == BCTR); 2934} 2935 2936static bfd_boolean 2937section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr) 2938{ 2939 bfd_vma vma = *(bfd_vma *) ptr; 2940 return ((section->flags & SEC_ALLOC) != 0 2941 && section->vma <= vma 2942 && vma < section->vma + section->size); 2943} 2944 2945static long 2946ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms, 2947 long dynsymcount, asymbol **dynsyms, 2948 asymbol **ret) 2949{ 2950 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); 2951 asection *plt, *relplt, *dynamic, *glink; 2952 bfd_vma glink_vma = 0; 2953 bfd_vma resolv_vma = 0; 2954 bfd_vma stub_vma; 2955 asymbol *s; 2956 arelent *p; 2957 long count, i; 2958 size_t size; 2959 char *names; 2960 bfd_byte buf[4]; 2961 2962 *ret = NULL; 2963 2964 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) 2965 return 0; 2966 2967 if (dynsymcount <= 0) 2968 return 0; 2969 2970 relplt = bfd_get_section_by_name (abfd, ".rela.plt"); 2971 if (relplt == NULL) 2972 return 0; 2973 2974 plt = bfd_get_section_by_name (abfd, ".plt"); 2975 if (plt == NULL) 2976 return 0; 2977 2978 /* Call common code to handle old-style executable PLTs. */ 2979 if (elf_section_flags (plt) & SHF_EXECINSTR) 2980 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms, 2981 dynsymcount, dynsyms, ret); 2982 2983 /* If this object was prelinked, the prelinker stored the address 2984 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */ 2985 dynamic = bfd_get_section_by_name (abfd, ".dynamic"); 2986 if (dynamic != NULL) 2987 { 2988 bfd_byte *dynbuf, *extdyn, *extdynend; 2989 size_t extdynsize; 2990 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); 2991 2992 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf)) 2993 return -1; 2994 2995 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; 2996 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; 2997 2998 extdyn = dynbuf; 2999 extdynend = extdyn + dynamic->size; 3000 for (; extdyn < extdynend; extdyn += extdynsize) 3001 { 3002 Elf_Internal_Dyn dyn; 3003 (*swap_dyn_in) (abfd, extdyn, &dyn); 3004 3005 if (dyn.d_tag == DT_NULL) 3006 break; 3007 3008 if (dyn.d_tag == DT_PPC_GOT) 3009 { 3010 unsigned int g_o_t = dyn.d_un.d_val; 3011 asection *got = bfd_get_section_by_name (abfd, ".got"); 3012 if (got != NULL 3013 && bfd_get_section_contents (abfd, got, buf, 3014 g_o_t - got->vma + 4, 4)) 3015 glink_vma = bfd_get_32 (abfd, buf); 3016 break; 3017 } 3018 } 3019 free (dynbuf); 3020 } 3021 3022 /* Otherwise we read the first plt entry. */ 3023 if (glink_vma == 0) 3024 { 3025 if (bfd_get_section_contents (abfd, plt, buf, 0, 4)) 3026 glink_vma = bfd_get_32 (abfd, buf); 3027 } 3028 3029 if (glink_vma == 0) 3030 return 0; 3031 3032 /* The .glink section usually does not survive the final 3033 link; search for the section (usually .text) where the 3034 glink stubs now reside. */ 3035 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma); 3036 if (glink == NULL) 3037 return 0; 3038 3039 /* Determine glink PLT resolver by reading the relative branch 3040 from the first glink stub. */ 3041 if (bfd_get_section_contents (abfd, glink, buf, 3042 glink_vma - glink->vma, 4)) 3043 { 3044 unsigned int insn = bfd_get_32 (abfd, buf); 3045 3046 /* The first glink stub may either branch to the resolver ... */ 3047 insn ^= B; 3048 if ((insn & ~0x3fffffc) == 0) 3049 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000; 3050 3051 /* ... or fall through a bunch of NOPs. */ 3052 else if ((insn ^ B ^ NOP) == 0) 3053 for (i = 4; 3054 bfd_get_section_contents (abfd, glink, buf, 3055 glink_vma - glink->vma + i, 4); 3056 i += 4) 3057 if (bfd_get_32 (abfd, buf) != NOP) 3058 { 3059 resolv_vma = glink_vma + i; 3060 break; 3061 } 3062 } 3063 3064 count = relplt->size / sizeof (Elf32_External_Rela); 3065 /* If the stubs are those for -shared/-pie then we might have 3066 multiple stubs for each plt entry. If that is the case then 3067 there is no way to associate stubs with their plt entries short 3068 of figuring out the GOT pointer value used in the stub. */ 3069 if (!is_nonpic_glink_stub (abfd, glink, 3070 glink_vma - GLINK_ENTRY_SIZE - glink->vma)) 3071 return 0; 3072 3073 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; 3074 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) 3075 return -1; 3076 3077 size = count * sizeof (asymbol); 3078 p = relplt->relocation; 3079 for (i = 0; i < count; i++, p++) 3080 { 3081 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); 3082 if (p->addend != 0) 3083 size += sizeof ("+0x") - 1 + 8; 3084 } 3085 3086 size += sizeof (asymbol) + sizeof ("__glink"); 3087 3088 if (resolv_vma) 3089 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve"); 3090 3091 s = *ret = bfd_malloc (size); 3092 if (s == NULL) 3093 return -1; 3094 3095 stub_vma = glink_vma; 3096 names = (char *) (s + count + 1 + (resolv_vma != 0)); 3097 p = relplt->relocation + count - 1; 3098 for (i = 0; i < count; i++) 3099 { 3100 size_t len; 3101 3102 *s = **p->sym_ptr_ptr; 3103 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since 3104 we are defining a symbol, ensure one of them is set. */ 3105 if ((s->flags & BSF_LOCAL) == 0) 3106 s->flags |= BSF_GLOBAL; 3107 s->flags |= BSF_SYNTHETIC; 3108 s->section = glink; 3109 stub_vma -= 16; 3110 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0) 3111 stub_vma -= 32; 3112 s->value = stub_vma - glink->vma; 3113 s->name = names; 3114 s->udata.p = NULL; 3115 len = strlen ((*p->sym_ptr_ptr)->name); 3116 memcpy (names, (*p->sym_ptr_ptr)->name, len); 3117 names += len; 3118 if (p->addend != 0) 3119 { 3120 memcpy (names, "+0x", sizeof ("+0x") - 1); 3121 names += sizeof ("+0x") - 1; 3122 bfd_sprintf_vma (abfd, names, p->addend); 3123 names += strlen (names); 3124 } 3125 memcpy (names, "@plt", sizeof ("@plt")); 3126 names += sizeof ("@plt"); 3127 ++s; 3128 --p; 3129 } 3130 3131 /* Add a symbol at the start of the glink branch table. */ 3132 memset (s, 0, sizeof *s); 3133 s->the_bfd = abfd; 3134 s->flags = BSF_GLOBAL | BSF_SYNTHETIC; 3135 s->section = glink; 3136 s->value = glink_vma - glink->vma; 3137 s->name = names; 3138 memcpy (names, "__glink", sizeof ("__glink")); 3139 names += sizeof ("__glink"); 3140 s++; 3141 count++; 3142 3143 if (resolv_vma) 3144 { 3145 /* Add a symbol for the glink PLT resolver. */ 3146 memset (s, 0, sizeof *s); 3147 s->the_bfd = abfd; 3148 s->flags = BSF_GLOBAL | BSF_SYNTHETIC; 3149 s->section = glink; 3150 s->value = resolv_vma - glink->vma; 3151 s->name = names; 3152 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve")); 3153 names += sizeof ("__glink_PLTresolve"); 3154 s++; 3155 count++; 3156 } 3157 3158 return count; 3159} 3160 3161/* The following functions are specific to the ELF linker, while 3162 functions above are used generally. They appear in this file more 3163 or less in the order in which they are called. eg. 3164 ppc_elf_check_relocs is called early in the link process, 3165 ppc_elf_finish_dynamic_sections is one of the last functions 3166 called. */ 3167 3168/* Track PLT entries needed for a given symbol. We might need more 3169 than one glink entry per symbol when generating a pic binary. */ 3170struct plt_entry 3171{ 3172 struct plt_entry *next; 3173 3174 /* -fPIC uses multiple GOT sections, one per file, called ".got2". 3175 This field stores the offset into .got2 used to initialise the 3176 GOT pointer reg. It will always be at least 32768. (Current 3177 gcc always uses an offset of 32768, but ld -r will pack .got2 3178 sections together resulting in larger offsets). */ 3179 bfd_vma addend; 3180 3181 /* The .got2 section. */ 3182 asection *sec; 3183 3184 /* PLT refcount or offset. */ 3185 union 3186 { 3187 bfd_signed_vma refcount; 3188 bfd_vma offset; 3189 } plt; 3190 3191 /* .glink stub offset. */ 3192 bfd_vma glink_offset; 3193}; 3194 3195/* Of those relocs that might be copied as dynamic relocs, this function 3196 selects those that must be copied when linking a shared library, 3197 even when the symbol is local. */ 3198 3199static int 3200must_be_dyn_reloc (struct bfd_link_info *info, 3201 enum elf_ppc_reloc_type r_type) 3202{ 3203 switch (r_type) 3204 { 3205 default: 3206 return 1; 3207 3208 case R_PPC_REL24: 3209 case R_PPC_REL14: 3210 case R_PPC_REL14_BRTAKEN: 3211 case R_PPC_REL14_BRNTAKEN: 3212 case R_PPC_REL32: 3213 return 0; 3214 3215 case R_PPC_TPREL32: 3216 case R_PPC_TPREL16: 3217 case R_PPC_TPREL16_LO: 3218 case R_PPC_TPREL16_HI: 3219 case R_PPC_TPREL16_HA: 3220 return !bfd_link_executable (info); 3221 } 3222} 3223 3224/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 3225 copying dynamic variables from a shared lib into an app's dynbss 3226 section, and instead use a dynamic relocation to point into the 3227 shared lib. */ 3228#define ELIMINATE_COPY_RELOCS 1 3229 3230/* Used to track dynamic relocations for local symbols. */ 3231struct ppc_dyn_relocs 3232{ 3233 struct ppc_dyn_relocs *next; 3234 3235 /* The input section of the reloc. */ 3236 asection *sec; 3237 3238 /* Total number of relocs copied for the input section. */ 3239 unsigned int count : 31; 3240 3241 /* Whether this entry is for STT_GNU_IFUNC symbols. */ 3242 unsigned int ifunc : 1; 3243}; 3244 3245/* PPC ELF linker hash entry. */ 3246 3247struct ppc_elf_link_hash_entry 3248{ 3249 struct elf_link_hash_entry elf; 3250 3251 /* If this symbol is used in the linker created sections, the processor 3252 specific backend uses this field to map the field into the offset 3253 from the beginning of the section. */ 3254 elf_linker_section_pointers_t *linker_section_pointer; 3255 3256 /* Track dynamic relocs copied for this symbol. */ 3257 struct elf_dyn_relocs *dyn_relocs; 3258 3259 /* Contexts in which symbol is used in the GOT (or TOC). 3260 TLS_GD .. TLS_TLS bits are or'd into the mask as the 3261 corresponding relocs are encountered during check_relocs. 3262 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to 3263 indicate the corresponding GOT entry type is not needed. */ 3264#define TLS_GD 1 /* GD reloc. */ 3265#define TLS_LD 2 /* LD reloc. */ 3266#define TLS_TPREL 4 /* TPREL reloc, => IE. */ 3267#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ 3268#define TLS_TLS 16 /* Any TLS reloc. */ 3269#define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */ 3270#define PLT_IFUNC 64 /* STT_GNU_IFUNC. */ 3271 char tls_mask; 3272 3273 /* Nonzero if we have seen a small data relocation referring to this 3274 symbol. */ 3275 unsigned char has_sda_refs : 1; 3276 3277 /* Flag use of given relocations. */ 3278 unsigned char has_addr16_ha : 1; 3279 unsigned char has_addr16_lo : 1; 3280}; 3281 3282#define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) 3283 3284/* PPC ELF linker hash table. */ 3285 3286struct ppc_elf_link_hash_table 3287{ 3288 struct elf_link_hash_table elf; 3289 3290 /* Various options passed from the linker. */ 3291 struct ppc_elf_params *params; 3292 3293 /* Short-cuts to get to dynamic linker sections. */ 3294 asection *glink; 3295 asection *dynsbss; 3296 asection *relsbss; 3297 elf_linker_section_t sdata[2]; 3298 asection *sbss; 3299 asection *glink_eh_frame; 3300 3301 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */ 3302 asection *srelplt2; 3303 3304 /* Shortcut to __tls_get_addr. */ 3305 struct elf_link_hash_entry *tls_get_addr; 3306 3307 /* The bfd that forced an old-style PLT. */ 3308 bfd *old_bfd; 3309 3310 /* TLS local dynamic got entry handling. */ 3311 union { 3312 bfd_signed_vma refcount; 3313 bfd_vma offset; 3314 } tlsld_got; 3315 3316 /* Offset of branch table to PltResolve function in glink. */ 3317 bfd_vma glink_pltresolve; 3318 3319 /* Size of reserved GOT entries. */ 3320 unsigned int got_header_size; 3321 /* Non-zero if allocating the header left a gap. */ 3322 unsigned int got_gap; 3323 3324 /* The type of PLT we have chosen to use. */ 3325 enum ppc_elf_plt_type plt_type; 3326 3327 /* True if the target system is VxWorks. */ 3328 unsigned int is_vxworks:1; 3329 3330 /* The size of PLT entries. */ 3331 int plt_entry_size; 3332 /* The distance between adjacent PLT slots. */ 3333 int plt_slot_size; 3334 /* The size of the first PLT entry. */ 3335 int plt_initial_entry_size; 3336 3337 /* Small local sym cache. */ 3338 struct sym_cache sym_cache; 3339}; 3340 3341/* Rename some of the generic section flags to better document how they 3342 are used for ppc32. The flags are only valid for ppc32 elf objects. */ 3343 3344/* Nonzero if this section has TLS related relocations. */ 3345#define has_tls_reloc sec_flg0 3346 3347/* Nonzero if this section has a call to __tls_get_addr. */ 3348#define has_tls_get_addr_call sec_flg1 3349 3350/* Get the PPC ELF linker hash table from a link_info structure. */ 3351 3352#define ppc_elf_hash_table(p) \ 3353 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 3354 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL) 3355 3356/* Create an entry in a PPC ELF linker hash table. */ 3357 3358static struct bfd_hash_entry * 3359ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 3360 struct bfd_hash_table *table, 3361 const char *string) 3362{ 3363 /* Allocate the structure if it has not already been allocated by a 3364 subclass. */ 3365 if (entry == NULL) 3366 { 3367 entry = bfd_hash_allocate (table, 3368 sizeof (struct ppc_elf_link_hash_entry)); 3369 if (entry == NULL) 3370 return entry; 3371 } 3372 3373 /* Call the allocation method of the superclass. */ 3374 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 3375 if (entry != NULL) 3376 { 3377 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL; 3378 ppc_elf_hash_entry (entry)->dyn_relocs = NULL; 3379 ppc_elf_hash_entry (entry)->tls_mask = 0; 3380 ppc_elf_hash_entry (entry)->has_sda_refs = 0; 3381 } 3382 3383 return entry; 3384} 3385 3386/* Create a PPC ELF linker hash table. */ 3387 3388static struct bfd_link_hash_table * 3389ppc_elf_link_hash_table_create (bfd *abfd) 3390{ 3391 struct ppc_elf_link_hash_table *ret; 3392 static struct ppc_elf_params default_params 3393 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0, 0 }; 3394 3395 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table)); 3396 if (ret == NULL) 3397 return NULL; 3398 3399 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, 3400 ppc_elf_link_hash_newfunc, 3401 sizeof (struct ppc_elf_link_hash_entry), 3402 PPC32_ELF_DATA)) 3403 { 3404 free (ret); 3405 return NULL; 3406 } 3407 3408 ret->elf.init_plt_refcount.refcount = 0; 3409 ret->elf.init_plt_refcount.glist = NULL; 3410 ret->elf.init_plt_offset.offset = 0; 3411 ret->elf.init_plt_offset.glist = NULL; 3412 3413 ret->params = &default_params; 3414 3415 ret->sdata[0].name = ".sdata"; 3416 ret->sdata[0].sym_name = "_SDA_BASE_"; 3417 ret->sdata[0].bss_name = ".sbss"; 3418 3419 ret->sdata[1].name = ".sdata2"; 3420 ret->sdata[1].sym_name = "_SDA2_BASE_"; 3421 ret->sdata[1].bss_name = ".sbss2"; 3422 3423 ret->plt_entry_size = 12; 3424 ret->plt_slot_size = 8; 3425 ret->plt_initial_entry_size = 72; 3426 3427 return &ret->elf.root; 3428} 3429 3430/* Hook linker params into hash table. */ 3431 3432void 3433ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params) 3434{ 3435 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 3436 3437 if (htab) 3438 htab->params = params; 3439 params->pagesize_p2 = bfd_log2 (params->pagesize); 3440} 3441 3442/* Create .got and the related sections. */ 3443 3444static bfd_boolean 3445ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info) 3446{ 3447 struct ppc_elf_link_hash_table *htab; 3448 3449 if (!_bfd_elf_create_got_section (abfd, info)) 3450 return FALSE; 3451 3452 htab = ppc_elf_hash_table (info); 3453 if (!htab->is_vxworks) 3454 { 3455 /* The powerpc .got has a blrl instruction in it. Mark it 3456 executable. */ 3457 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS 3458 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3459 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags)) 3460 return FALSE; 3461 } 3462 3463 return TRUE; 3464} 3465 3466/* Create a special linker section, used for R_PPC_EMB_SDAI16 and 3467 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata 3468 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */ 3469 3470static bfd_boolean 3471ppc_elf_create_linker_section (bfd *abfd, 3472 struct bfd_link_info *info, 3473 flagword flags, 3474 elf_linker_section_t *lsect) 3475{ 3476 asection *s; 3477 3478 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 3479 | SEC_LINKER_CREATED); 3480 3481 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags); 3482 if (s == NULL) 3483 return FALSE; 3484 lsect->section = s; 3485 3486 /* Define the sym on the first section of this name. */ 3487 s = bfd_get_section_by_name (abfd, lsect->name); 3488 3489 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name); 3490 if (lsect->sym == NULL) 3491 return FALSE; 3492 lsect->sym->root.u.def.value = 0x8000; 3493 return TRUE; 3494} 3495 3496static bfd_boolean 3497ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info) 3498{ 3499 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 3500 asection *s; 3501 flagword flags; 3502 3503 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS 3504 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3505 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags); 3506 htab->glink = s; 3507 if (s == NULL 3508 || !bfd_set_section_alignment (abfd, s, 3509 htab->params->ppc476_workaround ? 6 : 4)) 3510 return FALSE; 3511 3512 if (!info->no_ld_generated_unwind_info) 3513 { 3514 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3515 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3516 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags); 3517 htab->glink_eh_frame = s; 3518 if (s == NULL 3519 || !bfd_set_section_alignment (abfd, s, 2)) 3520 return FALSE; 3521 } 3522 3523 flags = SEC_ALLOC | SEC_LINKER_CREATED; 3524 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags); 3525 htab->elf.iplt = s; 3526 if (s == NULL 3527 || !bfd_set_section_alignment (abfd, s, 4)) 3528 return FALSE; 3529 3530 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3531 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3532 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags); 3533 htab->elf.irelplt = s; 3534 if (s == NULL 3535 || ! bfd_set_section_alignment (abfd, s, 2)) 3536 return FALSE; 3537 3538 if (!ppc_elf_create_linker_section (abfd, info, 0, 3539 &htab->sdata[0])) 3540 return FALSE; 3541 3542 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY, 3543 &htab->sdata[1])) 3544 return FALSE; 3545 3546 return TRUE; 3547} 3548 3549/* We have to create .dynsbss and .rela.sbss here so that they get mapped 3550 to output sections (just like _bfd_elf_create_dynamic_sections has 3551 to create .dynbss and .rela.bss). */ 3552 3553static bfd_boolean 3554ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 3555{ 3556 struct ppc_elf_link_hash_table *htab; 3557 asection *s; 3558 flagword flags; 3559 3560 htab = ppc_elf_hash_table (info); 3561 3562 if (htab->elf.sgot == NULL 3563 && !ppc_elf_create_got (abfd, info)) 3564 return FALSE; 3565 3566 if (!_bfd_elf_create_dynamic_sections (abfd, info)) 3567 return FALSE; 3568 3569 if (htab->glink == NULL 3570 && !ppc_elf_create_glink (abfd, info)) 3571 return FALSE; 3572 3573 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss", 3574 SEC_ALLOC | SEC_LINKER_CREATED); 3575 htab->dynsbss = s; 3576 if (s == NULL) 3577 return FALSE; 3578 3579 if (! bfd_link_pic (info)) 3580 { 3581 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3582 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3583 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags); 3584 htab->relsbss = s; 3585 if (s == NULL 3586 || ! bfd_set_section_alignment (abfd, s, 2)) 3587 return FALSE; 3588 } 3589 3590 if (htab->is_vxworks 3591 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2)) 3592 return FALSE; 3593 3594 s = htab->elf.splt; 3595 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED; 3596 if (htab->plt_type == PLT_VXWORKS) 3597 /* The VxWorks PLT is a loaded section with contents. */ 3598 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY; 3599 return bfd_set_section_flags (abfd, s, flags); 3600} 3601 3602/* Copy the extra info we tack onto an elf_link_hash_entry. */ 3603 3604static void 3605ppc_elf_copy_indirect_symbol (struct bfd_link_info *info, 3606 struct elf_link_hash_entry *dir, 3607 struct elf_link_hash_entry *ind) 3608{ 3609 struct ppc_elf_link_hash_entry *edir, *eind; 3610 3611 edir = (struct ppc_elf_link_hash_entry *) dir; 3612 eind = (struct ppc_elf_link_hash_entry *) ind; 3613 3614 edir->tls_mask |= eind->tls_mask; 3615 edir->has_sda_refs |= eind->has_sda_refs; 3616 3617 /* If called to transfer flags for a weakdef during processing 3618 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 3619 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 3620 if (!(ELIMINATE_COPY_RELOCS 3621 && eind->elf.root.type != bfd_link_hash_indirect 3622 && edir->elf.dynamic_adjusted)) 3623 edir->elf.non_got_ref |= eind->elf.non_got_ref; 3624 3625 if (edir->elf.versioned != versioned_hidden) 3626 edir->elf.ref_dynamic |= eind->elf.ref_dynamic; 3627 edir->elf.ref_regular |= eind->elf.ref_regular; 3628 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; 3629 edir->elf.needs_plt |= eind->elf.needs_plt; 3630 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed; 3631 3632 if (eind->dyn_relocs != NULL) 3633 { 3634 if (edir->dyn_relocs != NULL) 3635 { 3636 struct elf_dyn_relocs **pp; 3637 struct elf_dyn_relocs *p; 3638 3639 /* Add reloc counts against the indirect sym to the direct sym 3640 list. Merge any entries against the same section. */ 3641 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 3642 { 3643 struct elf_dyn_relocs *q; 3644 3645 for (q = edir->dyn_relocs; q != NULL; q = q->next) 3646 if (q->sec == p->sec) 3647 { 3648 q->pc_count += p->pc_count; 3649 q->count += p->count; 3650 *pp = p->next; 3651 break; 3652 } 3653 if (q == NULL) 3654 pp = &p->next; 3655 } 3656 *pp = edir->dyn_relocs; 3657 } 3658 3659 edir->dyn_relocs = eind->dyn_relocs; 3660 eind->dyn_relocs = NULL; 3661 } 3662 3663 /* If we were called to copy over info for a weak sym, that's all. 3664 You might think dyn_relocs need not be copied over; After all, 3665 both syms will be dynamic or both non-dynamic so we're just 3666 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS 3667 code in ppc_elf_adjust_dynamic_symbol needs to check for 3668 dyn_relocs in read-only sections, and it does so on what is the 3669 DIR sym here. */ 3670 if (eind->elf.root.type != bfd_link_hash_indirect) 3671 return; 3672 3673 /* Copy over the GOT refcount entries that we may have already seen to 3674 the symbol which just became indirect. */ 3675 edir->elf.got.refcount += eind->elf.got.refcount; 3676 eind->elf.got.refcount = 0; 3677 3678 /* And plt entries. */ 3679 if (eind->elf.plt.plist != NULL) 3680 { 3681 if (edir->elf.plt.plist != NULL) 3682 { 3683 struct plt_entry **entp; 3684 struct plt_entry *ent; 3685 3686 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; ) 3687 { 3688 struct plt_entry *dent; 3689 3690 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next) 3691 if (dent->sec == ent->sec && dent->addend == ent->addend) 3692 { 3693 dent->plt.refcount += ent->plt.refcount; 3694 *entp = ent->next; 3695 break; 3696 } 3697 if (dent == NULL) 3698 entp = &ent->next; 3699 } 3700 *entp = edir->elf.plt.plist; 3701 } 3702 3703 edir->elf.plt.plist = eind->elf.plt.plist; 3704 eind->elf.plt.plist = NULL; 3705 } 3706 3707 if (eind->elf.dynindx != -1) 3708 { 3709 if (edir->elf.dynindx != -1) 3710 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 3711 edir->elf.dynstr_index); 3712 edir->elf.dynindx = eind->elf.dynindx; 3713 edir->elf.dynstr_index = eind->elf.dynstr_index; 3714 eind->elf.dynindx = -1; 3715 eind->elf.dynstr_index = 0; 3716 } 3717} 3718 3719/* Hook called by the linker routine which adds symbols from an object 3720 file. We use it to put .comm items in .sbss, and not .bss. */ 3721 3722static bfd_boolean 3723ppc_elf_add_symbol_hook (bfd *abfd, 3724 struct bfd_link_info *info, 3725 Elf_Internal_Sym *sym, 3726 const char **namep ATTRIBUTE_UNUSED, 3727 flagword *flagsp ATTRIBUTE_UNUSED, 3728 asection **secp, 3729 bfd_vma *valp) 3730{ 3731 if (sym->st_shndx == SHN_COMMON 3732 && !bfd_link_relocatable (info) 3733 && is_ppc_elf (info->output_bfd) 3734 && sym->st_size <= elf_gp_size (abfd)) 3735 { 3736 /* Common symbols less than or equal to -G nn bytes are automatically 3737 put into .sbss. */ 3738 struct ppc_elf_link_hash_table *htab; 3739 3740 htab = ppc_elf_hash_table (info); 3741 if (htab->sbss == NULL) 3742 { 3743 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED; 3744 3745 if (!htab->elf.dynobj) 3746 htab->elf.dynobj = abfd; 3747 3748 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj, 3749 ".sbss", 3750 flags); 3751 if (htab->sbss == NULL) 3752 return FALSE; 3753 } 3754 3755 *secp = htab->sbss; 3756 *valp = sym->st_size; 3757 } 3758 3759 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC 3760 && (abfd->flags & DYNAMIC) == 0 3761 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) 3762 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc; 3763 3764 return TRUE; 3765} 3766 3767/* Find a linker generated pointer with a given addend and type. */ 3768 3769static elf_linker_section_pointers_t * 3770elf_find_pointer_linker_section 3771 (elf_linker_section_pointers_t *linker_pointers, 3772 bfd_vma addend, 3773 elf_linker_section_t *lsect) 3774{ 3775 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next) 3776 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend) 3777 return linker_pointers; 3778 3779 return NULL; 3780} 3781 3782/* Allocate a pointer to live in a linker created section. */ 3783 3784static bfd_boolean 3785elf_allocate_pointer_linker_section (bfd *abfd, 3786 elf_linker_section_t *lsect, 3787 struct elf_link_hash_entry *h, 3788 const Elf_Internal_Rela *rel) 3789{ 3790 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; 3791 elf_linker_section_pointers_t *linker_section_ptr; 3792 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 3793 bfd_size_type amt; 3794 3795 BFD_ASSERT (lsect != NULL); 3796 3797 /* Is this a global symbol? */ 3798 if (h != NULL) 3799 { 3800 struct ppc_elf_link_hash_entry *eh; 3801 3802 /* Has this symbol already been allocated? If so, our work is done. */ 3803 eh = (struct ppc_elf_link_hash_entry *) h; 3804 if (elf_find_pointer_linker_section (eh->linker_section_pointer, 3805 rel->r_addend, 3806 lsect)) 3807 return TRUE; 3808 3809 ptr_linker_section_ptr = &eh->linker_section_pointer; 3810 } 3811 else 3812 { 3813 BFD_ASSERT (is_ppc_elf (abfd)); 3814 3815 /* Allocation of a pointer to a local symbol. */ 3816 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); 3817 3818 /* Allocate a table to hold the local symbols if first time. */ 3819 if (!ptr) 3820 { 3821 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info; 3822 3823 amt = num_symbols; 3824 amt *= sizeof (elf_linker_section_pointers_t *); 3825 ptr = bfd_zalloc (abfd, amt); 3826 3827 if (!ptr) 3828 return FALSE; 3829 3830 elf_local_ptr_offsets (abfd) = ptr; 3831 } 3832 3833 /* Has this symbol already been allocated? If so, our work is done. */ 3834 if (elf_find_pointer_linker_section (ptr[r_symndx], 3835 rel->r_addend, 3836 lsect)) 3837 return TRUE; 3838 3839 ptr_linker_section_ptr = &ptr[r_symndx]; 3840 } 3841 3842 /* Allocate space for a pointer in the linker section, and allocate 3843 a new pointer record from internal memory. */ 3844 BFD_ASSERT (ptr_linker_section_ptr != NULL); 3845 amt = sizeof (elf_linker_section_pointers_t); 3846 linker_section_ptr = bfd_alloc (abfd, amt); 3847 3848 if (!linker_section_ptr) 3849 return FALSE; 3850 3851 linker_section_ptr->next = *ptr_linker_section_ptr; 3852 linker_section_ptr->addend = rel->r_addend; 3853 linker_section_ptr->lsect = lsect; 3854 *ptr_linker_section_ptr = linker_section_ptr; 3855 3856 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2)) 3857 return FALSE; 3858 linker_section_ptr->offset = lsect->section->size; 3859 lsect->section->size += 4; 3860 3861#ifdef DEBUG 3862 fprintf (stderr, 3863 "Create pointer in linker section %s, offset = %ld, section size = %ld\n", 3864 lsect->name, (long) linker_section_ptr->offset, 3865 (long) lsect->section->size); 3866#endif 3867 3868 return TRUE; 3869} 3870 3871static struct plt_entry ** 3872update_local_sym_info (bfd *abfd, 3873 Elf_Internal_Shdr *symtab_hdr, 3874 unsigned long r_symndx, 3875 int tls_type) 3876{ 3877 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); 3878 struct plt_entry **local_plt; 3879 char *local_got_tls_masks; 3880 3881 if (local_got_refcounts == NULL) 3882 { 3883 bfd_size_type size = symtab_hdr->sh_info; 3884 3885 size *= (sizeof (*local_got_refcounts) 3886 + sizeof (*local_plt) 3887 + sizeof (*local_got_tls_masks)); 3888 local_got_refcounts = bfd_zalloc (abfd, size); 3889 if (local_got_refcounts == NULL) 3890 return NULL; 3891 elf_local_got_refcounts (abfd) = local_got_refcounts; 3892 } 3893 3894 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info); 3895 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info); 3896 local_got_tls_masks[r_symndx] |= tls_type; 3897 if (tls_type != PLT_IFUNC) 3898 local_got_refcounts[r_symndx] += 1; 3899 return local_plt + r_symndx; 3900} 3901 3902static bfd_boolean 3903update_plt_info (bfd *abfd, struct plt_entry **plist, 3904 asection *sec, bfd_vma addend) 3905{ 3906 struct plt_entry *ent; 3907 3908 if (addend < 32768) 3909 sec = NULL; 3910 for (ent = *plist; ent != NULL; ent = ent->next) 3911 if (ent->sec == sec && ent->addend == addend) 3912 break; 3913 if (ent == NULL) 3914 { 3915 bfd_size_type amt = sizeof (*ent); 3916 ent = bfd_alloc (abfd, amt); 3917 if (ent == NULL) 3918 return FALSE; 3919 ent->next = *plist; 3920 ent->sec = sec; 3921 ent->addend = addend; 3922 ent->plt.refcount = 0; 3923 *plist = ent; 3924 } 3925 ent->plt.refcount += 1; 3926 return TRUE; 3927} 3928 3929static struct plt_entry * 3930find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend) 3931{ 3932 struct plt_entry *ent; 3933 3934 if (addend < 32768) 3935 sec = NULL; 3936 for (ent = *plist; ent != NULL; ent = ent->next) 3937 if (ent->sec == sec && ent->addend == addend) 3938 break; 3939 return ent; 3940} 3941 3942static bfd_boolean 3943is_branch_reloc (enum elf_ppc_reloc_type r_type) 3944{ 3945 return (r_type == R_PPC_PLTREL24 3946 || r_type == R_PPC_LOCAL24PC 3947 || r_type == R_PPC_REL24 3948 || r_type == R_PPC_REL14 3949 || r_type == R_PPC_REL14_BRTAKEN 3950 || r_type == R_PPC_REL14_BRNTAKEN 3951 || r_type == R_PPC_ADDR24 3952 || r_type == R_PPC_ADDR14 3953 || r_type == R_PPC_ADDR14_BRTAKEN 3954 || r_type == R_PPC_ADDR14_BRNTAKEN 3955 || r_type == R_PPC_VLE_REL24); 3956} 3957 3958static void 3959bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type) 3960{ 3961 _bfd_error_handler 3962 /* xgettext:c-format */ 3963 (_("%B: relocation %s cannot be used when making a shared object"), 3964 abfd, 3965 ppc_elf_howto_table[r_type]->name); 3966 bfd_set_error (bfd_error_bad_value); 3967} 3968 3969/* Look through the relocs for a section during the first phase, and 3970 allocate space in the global offset table or procedure linkage 3971 table. */ 3972 3973static bfd_boolean 3974ppc_elf_check_relocs (bfd *abfd, 3975 struct bfd_link_info *info, 3976 asection *sec, 3977 const Elf_Internal_Rela *relocs) 3978{ 3979 struct ppc_elf_link_hash_table *htab; 3980 Elf_Internal_Shdr *symtab_hdr; 3981 struct elf_link_hash_entry **sym_hashes; 3982 const Elf_Internal_Rela *rel; 3983 const Elf_Internal_Rela *rel_end; 3984 asection *got2, *sreloc; 3985 struct elf_link_hash_entry *tga; 3986 3987 if (bfd_link_relocatable (info)) 3988 return TRUE; 3989 3990 /* Don't do anything special with non-loaded, non-alloced sections. 3991 In particular, any relocs in such sections should not affect GOT 3992 and PLT reference counting (ie. we don't allow them to create GOT 3993 or PLT entries), there's no possibility or desire to optimize TLS 3994 relocs, and there's not much point in propagating relocs to shared 3995 libs that the dynamic linker won't relocate. */ 3996 if ((sec->flags & SEC_ALLOC) == 0) 3997 return TRUE; 3998 3999#ifdef DEBUG 4000 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B", 4001 sec, abfd); 4002#endif 4003 4004 BFD_ASSERT (is_ppc_elf (abfd)); 4005 4006 /* Initialize howto table if not already done. */ 4007 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 4008 ppc_elf_howto_init (); 4009 4010 htab = ppc_elf_hash_table (info); 4011 if (htab->glink == NULL) 4012 { 4013 if (htab->elf.dynobj == NULL) 4014 htab->elf.dynobj = abfd; 4015 if (!ppc_elf_create_glink (htab->elf.dynobj, info)) 4016 return FALSE; 4017 } 4018 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", 4019 FALSE, FALSE, TRUE); 4020 symtab_hdr = &elf_symtab_hdr (abfd); 4021 sym_hashes = elf_sym_hashes (abfd); 4022 got2 = bfd_get_section_by_name (abfd, ".got2"); 4023 sreloc = NULL; 4024 4025 rel_end = relocs + sec->reloc_count; 4026 for (rel = relocs; rel < rel_end; rel++) 4027 { 4028 unsigned long r_symndx; 4029 enum elf_ppc_reloc_type r_type; 4030 struct elf_link_hash_entry *h; 4031 int tls_type; 4032 struct plt_entry **ifunc; 4033 4034 r_symndx = ELF32_R_SYM (rel->r_info); 4035 if (r_symndx < symtab_hdr->sh_info) 4036 h = NULL; 4037 else 4038 { 4039 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 4040 while (h->root.type == bfd_link_hash_indirect 4041 || h->root.type == bfd_link_hash_warning) 4042 h = (struct elf_link_hash_entry *) h->root.u.i.link; 4043 4044 /* PR15323, ref flags aren't set for references in the same 4045 object. */ 4046 h->root.non_ir_ref = 1; 4047 } 4048 4049 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. 4050 This shows up in particular in an R_PPC_ADDR32 in the eabi 4051 startup code. */ 4052 if (h != NULL 4053 && htab->elf.sgot == NULL 4054 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 4055 { 4056 if (htab->elf.dynobj == NULL) 4057 htab->elf.dynobj = abfd; 4058 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 4059 return FALSE; 4060 BFD_ASSERT (h == htab->elf.hgot); 4061 } 4062 4063 tls_type = 0; 4064 r_type = ELF32_R_TYPE (rel->r_info); 4065 ifunc = NULL; 4066 if (h == NULL && !htab->is_vxworks) 4067 { 4068 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache, 4069 abfd, r_symndx); 4070 if (isym == NULL) 4071 return FALSE; 4072 4073 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 4074 { 4075 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */ 4076 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx, 4077 PLT_IFUNC); 4078 if (ifunc == NULL) 4079 return FALSE; 4080 4081 /* STT_GNU_IFUNC symbols must have a PLT entry; 4082 In a non-pie executable even when there are 4083 no plt calls. */ 4084 if (!bfd_link_pic (info) 4085 || is_branch_reloc (r_type)) 4086 { 4087 bfd_vma addend = 0; 4088 if (r_type == R_PPC_PLTREL24) 4089 { 4090 ppc_elf_tdata (abfd)->makes_plt_call = 1; 4091 if (bfd_link_pic (info)) 4092 addend = rel->r_addend; 4093 } 4094 if (!update_plt_info (abfd, ifunc, got2, addend)) 4095 return FALSE; 4096 } 4097 } 4098 } 4099 4100 if (!htab->is_vxworks 4101 && is_branch_reloc (r_type) 4102 && h != NULL 4103 && h == tga) 4104 { 4105 if (rel != relocs 4106 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD 4107 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD)) 4108 /* We have a new-style __tls_get_addr call with a marker 4109 reloc. */ 4110 ; 4111 else 4112 /* Mark this section as having an old-style call. */ 4113 sec->has_tls_get_addr_call = 1; 4114 } 4115 4116 switch (r_type) 4117 { 4118 case R_PPC_TLSGD: 4119 case R_PPC_TLSLD: 4120 /* These special tls relocs tie a call to __tls_get_addr with 4121 its parameter symbol. */ 4122 break; 4123 4124 case R_PPC_GOT_TLSLD16: 4125 case R_PPC_GOT_TLSLD16_LO: 4126 case R_PPC_GOT_TLSLD16_HI: 4127 case R_PPC_GOT_TLSLD16_HA: 4128 tls_type = TLS_TLS | TLS_LD; 4129 goto dogottls; 4130 4131 case R_PPC_GOT_TLSGD16: 4132 case R_PPC_GOT_TLSGD16_LO: 4133 case R_PPC_GOT_TLSGD16_HI: 4134 case R_PPC_GOT_TLSGD16_HA: 4135 tls_type = TLS_TLS | TLS_GD; 4136 goto dogottls; 4137 4138 case R_PPC_GOT_TPREL16: 4139 case R_PPC_GOT_TPREL16_LO: 4140 case R_PPC_GOT_TPREL16_HI: 4141 case R_PPC_GOT_TPREL16_HA: 4142 if (bfd_link_pic (info)) 4143 info->flags |= DF_STATIC_TLS; 4144 tls_type = TLS_TLS | TLS_TPREL; 4145 goto dogottls; 4146 4147 case R_PPC_GOT_DTPREL16: 4148 case R_PPC_GOT_DTPREL16_LO: 4149 case R_PPC_GOT_DTPREL16_HI: 4150 case R_PPC_GOT_DTPREL16_HA: 4151 tls_type = TLS_TLS | TLS_DTPREL; 4152 dogottls: 4153 sec->has_tls_reloc = 1; 4154 /* Fall through. */ 4155 4156 /* GOT16 relocations */ 4157 case R_PPC_GOT16: 4158 case R_PPC_GOT16_LO: 4159 case R_PPC_GOT16_HI: 4160 case R_PPC_GOT16_HA: 4161 /* This symbol requires a global offset table entry. */ 4162 if (htab->elf.sgot == NULL) 4163 { 4164 if (htab->elf.dynobj == NULL) 4165 htab->elf.dynobj = abfd; 4166 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 4167 return FALSE; 4168 } 4169 if (h != NULL) 4170 { 4171 h->got.refcount += 1; 4172 ppc_elf_hash_entry (h)->tls_mask |= tls_type; 4173 } 4174 else 4175 /* This is a global offset table entry for a local symbol. */ 4176 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)) 4177 return FALSE; 4178 4179 /* We may also need a plt entry if the symbol turns out to be 4180 an ifunc. */ 4181 if (h != NULL && !bfd_link_pic (info)) 4182 { 4183 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4184 return FALSE; 4185 } 4186 break; 4187 4188 /* Indirect .sdata relocation. */ 4189 case R_PPC_EMB_SDAI16: 4190 if (bfd_link_pic (info)) 4191 { 4192 bad_shared_reloc (abfd, r_type); 4193 return FALSE; 4194 } 4195 htab->sdata[0].sym->ref_regular = 1; 4196 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0], 4197 h, rel)) 4198 return FALSE; 4199 if (h != NULL) 4200 { 4201 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4202 h->non_got_ref = TRUE; 4203 } 4204 break; 4205 4206 /* Indirect .sdata2 relocation. */ 4207 case R_PPC_EMB_SDA2I16: 4208 if (bfd_link_pic (info)) 4209 { 4210 bad_shared_reloc (abfd, r_type); 4211 return FALSE; 4212 } 4213 htab->sdata[1].sym->ref_regular = 1; 4214 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1], 4215 h, rel)) 4216 return FALSE; 4217 if (h != NULL) 4218 { 4219 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4220 h->non_got_ref = TRUE; 4221 } 4222 break; 4223 4224 case R_PPC_SDAREL16: 4225 htab->sdata[0].sym->ref_regular = 1; 4226 /* Fall through. */ 4227 4228 case R_PPC_VLE_SDAREL_LO16A: 4229 case R_PPC_VLE_SDAREL_LO16D: 4230 case R_PPC_VLE_SDAREL_HI16A: 4231 case R_PPC_VLE_SDAREL_HI16D: 4232 case R_PPC_VLE_SDAREL_HA16A: 4233 case R_PPC_VLE_SDAREL_HA16D: 4234 if (h != NULL) 4235 { 4236 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4237 h->non_got_ref = TRUE; 4238 } 4239 break; 4240 4241 case R_PPC_VLE_REL8: 4242 case R_PPC_VLE_REL15: 4243 case R_PPC_VLE_REL24: 4244 case R_PPC_VLE_LO16A: 4245 case R_PPC_VLE_LO16D: 4246 case R_PPC_VLE_HI16A: 4247 case R_PPC_VLE_HI16D: 4248 case R_PPC_VLE_HA16A: 4249 case R_PPC_VLE_HA16D: 4250 break; 4251 4252 case R_PPC_EMB_SDA2REL: 4253 if (bfd_link_pic (info)) 4254 { 4255 bad_shared_reloc (abfd, r_type); 4256 return FALSE; 4257 } 4258 htab->sdata[1].sym->ref_regular = 1; 4259 if (h != NULL) 4260 { 4261 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4262 h->non_got_ref = TRUE; 4263 } 4264 break; 4265 4266 case R_PPC_VLE_SDA21_LO: 4267 case R_PPC_VLE_SDA21: 4268 case R_PPC_EMB_SDA21: 4269 case R_PPC_EMB_RELSDA: 4270 if (bfd_link_pic (info)) 4271 { 4272 bad_shared_reloc (abfd, r_type); 4273 return FALSE; 4274 } 4275 if (h != NULL) 4276 { 4277 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4278 h->non_got_ref = TRUE; 4279 } 4280 break; 4281 4282 case R_PPC_EMB_NADDR32: 4283 case R_PPC_EMB_NADDR16: 4284 case R_PPC_EMB_NADDR16_LO: 4285 case R_PPC_EMB_NADDR16_HI: 4286 case R_PPC_EMB_NADDR16_HA: 4287 if (bfd_link_pic (info)) 4288 { 4289 bad_shared_reloc (abfd, r_type); 4290 return FALSE; 4291 } 4292 if (h != NULL) 4293 h->non_got_ref = TRUE; 4294 break; 4295 4296 case R_PPC_PLTREL24: 4297 if (h == NULL) 4298 break; 4299 /* Fall through */ 4300 case R_PPC_PLT32: 4301 case R_PPC_PLTREL32: 4302 case R_PPC_PLT16_LO: 4303 case R_PPC_PLT16_HI: 4304 case R_PPC_PLT16_HA: 4305#ifdef DEBUG 4306 fprintf (stderr, "Reloc requires a PLT entry\n"); 4307#endif 4308 /* This symbol requires a procedure linkage table entry. */ 4309 if (h == NULL) 4310 { 4311 if (ifunc == NULL) 4312 { 4313 /* It does not make sense to have a procedure linkage 4314 table entry for a non-ifunc local symbol. */ 4315 info->callbacks->einfo 4316 /* xgettext:c-format */ 4317 (_("%P: %H: %s reloc against local symbol\n"), 4318 abfd, sec, rel->r_offset, 4319 ppc_elf_howto_table[r_type]->name); 4320 bfd_set_error (bfd_error_bad_value); 4321 return FALSE; 4322 } 4323 } 4324 else 4325 { 4326 bfd_vma addend = 0; 4327 4328 if (r_type == R_PPC_PLTREL24) 4329 { 4330 ppc_elf_tdata (abfd)->makes_plt_call = 1; 4331 if (bfd_link_pic (info)) 4332 addend = rel->r_addend; 4333 } 4334 h->needs_plt = 1; 4335 if (!update_plt_info (abfd, &h->plt.plist, got2, addend)) 4336 return FALSE; 4337 } 4338 break; 4339 4340 /* The following relocations don't need to propagate the 4341 relocation if linking a shared object since they are 4342 section relative. */ 4343 case R_PPC_SECTOFF: 4344 case R_PPC_SECTOFF_LO: 4345 case R_PPC_SECTOFF_HI: 4346 case R_PPC_SECTOFF_HA: 4347 case R_PPC_DTPREL16: 4348 case R_PPC_DTPREL16_LO: 4349 case R_PPC_DTPREL16_HI: 4350 case R_PPC_DTPREL16_HA: 4351 case R_PPC_TOC16: 4352 break; 4353 4354 case R_PPC_REL16: 4355 case R_PPC_REL16_LO: 4356 case R_PPC_REL16_HI: 4357 case R_PPC_REL16_HA: 4358 case R_PPC_REL16DX_HA: 4359 ppc_elf_tdata (abfd)->has_rel16 = 1; 4360 break; 4361 4362 /* These are just markers. */ 4363 case R_PPC_TLS: 4364 case R_PPC_EMB_MRKREF: 4365 case R_PPC_NONE: 4366 case R_PPC_max: 4367 case R_PPC_RELAX: 4368 case R_PPC_RELAX_PLT: 4369 case R_PPC_RELAX_PLTREL24: 4370 case R_PPC_16DX_HA: 4371 break; 4372 4373 /* These should only appear in dynamic objects. */ 4374 case R_PPC_COPY: 4375 case R_PPC_GLOB_DAT: 4376 case R_PPC_JMP_SLOT: 4377 case R_PPC_RELATIVE: 4378 case R_PPC_IRELATIVE: 4379 break; 4380 4381 /* These aren't handled yet. We'll report an error later. */ 4382 case R_PPC_ADDR30: 4383 case R_PPC_EMB_RELSEC16: 4384 case R_PPC_EMB_RELST_LO: 4385 case R_PPC_EMB_RELST_HI: 4386 case R_PPC_EMB_RELST_HA: 4387 case R_PPC_EMB_BIT_FLD: 4388 break; 4389 4390 /* This refers only to functions defined in the shared library. */ 4391 case R_PPC_LOCAL24PC: 4392 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET) 4393 { 4394 htab->plt_type = PLT_OLD; 4395 htab->old_bfd = abfd; 4396 } 4397 if (h != NULL && h->type == STT_GNU_IFUNC) 4398 { 4399 h->needs_plt = 1; 4400 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4401 return FALSE; 4402 } 4403 break; 4404 4405 /* This relocation describes the C++ object vtable hierarchy. 4406 Reconstruct it for later use during GC. */ 4407 case R_PPC_GNU_VTINHERIT: 4408 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 4409 return FALSE; 4410 break; 4411 4412 /* This relocation describes which C++ vtable entries are actually 4413 used. Record for later use during GC. */ 4414 case R_PPC_GNU_VTENTRY: 4415 BFD_ASSERT (h != NULL); 4416 if (h != NULL 4417 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 4418 return FALSE; 4419 break; 4420 4421 /* We shouldn't really be seeing these. */ 4422 case R_PPC_TPREL32: 4423 case R_PPC_TPREL16: 4424 case R_PPC_TPREL16_LO: 4425 case R_PPC_TPREL16_HI: 4426 case R_PPC_TPREL16_HA: 4427 if (bfd_link_pic (info)) 4428 info->flags |= DF_STATIC_TLS; 4429 goto dodyn; 4430 4431 /* Nor these. */ 4432 case R_PPC_DTPMOD32: 4433 case R_PPC_DTPREL32: 4434 goto dodyn; 4435 4436 case R_PPC_REL32: 4437 if (h == NULL 4438 && got2 != NULL 4439 && (sec->flags & SEC_CODE) != 0 4440 && bfd_link_pic (info) 4441 && htab->plt_type == PLT_UNSET) 4442 { 4443 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before 4444 the start of a function, which assembles to a REL32 4445 reference to .got2. If we detect one of these, then 4446 force the old PLT layout because the linker cannot 4447 reliably deduce the GOT pointer value needed for 4448 PLT call stubs. */ 4449 asection *s; 4450 Elf_Internal_Sym *isym; 4451 4452 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 4453 abfd, r_symndx); 4454 if (isym == NULL) 4455 return FALSE; 4456 4457 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 4458 if (s == got2) 4459 { 4460 htab->plt_type = PLT_OLD; 4461 htab->old_bfd = abfd; 4462 } 4463 } 4464 if (h == NULL || h == htab->elf.hgot) 4465 break; 4466 /* fall through */ 4467 4468 case R_PPC_ADDR32: 4469 case R_PPC_ADDR16: 4470 case R_PPC_ADDR16_LO: 4471 case R_PPC_ADDR16_HI: 4472 case R_PPC_ADDR16_HA: 4473 case R_PPC_UADDR32: 4474 case R_PPC_UADDR16: 4475 if (h != NULL && !bfd_link_pic (info)) 4476 { 4477 /* We may need a plt entry if the symbol turns out to be 4478 a function defined in a dynamic object. */ 4479 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4480 return FALSE; 4481 4482 /* We may need a copy reloc too. */ 4483 h->non_got_ref = 1; 4484 h->pointer_equality_needed = 1; 4485 if (r_type == R_PPC_ADDR16_HA) 4486 ppc_elf_hash_entry (h)->has_addr16_ha = 1; 4487 if (r_type == R_PPC_ADDR16_LO) 4488 ppc_elf_hash_entry (h)->has_addr16_lo = 1; 4489 } 4490 goto dodyn; 4491 4492 case R_PPC_REL24: 4493 case R_PPC_REL14: 4494 case R_PPC_REL14_BRTAKEN: 4495 case R_PPC_REL14_BRNTAKEN: 4496 if (h == NULL) 4497 break; 4498 if (h == htab->elf.hgot) 4499 { 4500 if (htab->plt_type == PLT_UNSET) 4501 { 4502 htab->plt_type = PLT_OLD; 4503 htab->old_bfd = abfd; 4504 } 4505 break; 4506 } 4507 /* fall through */ 4508 4509 case R_PPC_ADDR24: 4510 case R_PPC_ADDR14: 4511 case R_PPC_ADDR14_BRTAKEN: 4512 case R_PPC_ADDR14_BRNTAKEN: 4513 if (h != NULL && !bfd_link_pic (info)) 4514 { 4515 /* We may need a plt entry if the symbol turns out to be 4516 a function defined in a dynamic object. */ 4517 h->needs_plt = 1; 4518 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4519 return FALSE; 4520 break; 4521 } 4522 4523 dodyn: 4524 /* If we are creating a shared library, and this is a reloc 4525 against a global symbol, or a non PC relative reloc 4526 against a local symbol, then we need to copy the reloc 4527 into the shared library. However, if we are linking with 4528 -Bsymbolic, we do not need to copy a reloc against a 4529 global symbol which is defined in an object we are 4530 including in the link (i.e., DEF_REGULAR is set). At 4531 this point we have not seen all the input files, so it is 4532 possible that DEF_REGULAR is not set now but will be set 4533 later (it is never cleared). In case of a weak definition, 4534 DEF_REGULAR may be cleared later by a strong definition in 4535 a shared library. We account for that possibility below by 4536 storing information in the dyn_relocs field of the hash 4537 table entry. A similar situation occurs when creating 4538 shared libraries and symbol visibility changes render the 4539 symbol local. 4540 4541 If on the other hand, we are creating an executable, we 4542 may need to keep relocations for symbols satisfied by a 4543 dynamic library if we manage to avoid copy relocs for the 4544 symbol. */ 4545 if ((bfd_link_pic (info) 4546 && (must_be_dyn_reloc (info, r_type) 4547 || (h != NULL 4548 && (!SYMBOLIC_BIND (info, h) 4549 || h->root.type == bfd_link_hash_defweak 4550 || !h->def_regular)))) 4551 || (ELIMINATE_COPY_RELOCS 4552 && !bfd_link_pic (info) 4553 && h != NULL 4554 && (h->root.type == bfd_link_hash_defweak 4555 || !h->def_regular))) 4556 { 4557#ifdef DEBUG 4558 fprintf (stderr, 4559 "ppc_elf_check_relocs needs to " 4560 "create relocation for %s\n", 4561 (h && h->root.root.string 4562 ? h->root.root.string : "<unknown>")); 4563#endif 4564 if (sreloc == NULL) 4565 { 4566 if (htab->elf.dynobj == NULL) 4567 htab->elf.dynobj = abfd; 4568 4569 sreloc = _bfd_elf_make_dynamic_reloc_section 4570 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE); 4571 4572 if (sreloc == NULL) 4573 return FALSE; 4574 } 4575 4576 /* If this is a global symbol, we count the number of 4577 relocations we need for this symbol. */ 4578 if (h != NULL) 4579 { 4580 struct elf_dyn_relocs *p; 4581 struct elf_dyn_relocs **rel_head; 4582 4583 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs; 4584 p = *rel_head; 4585 if (p == NULL || p->sec != sec) 4586 { 4587 p = bfd_alloc (htab->elf.dynobj, sizeof *p); 4588 if (p == NULL) 4589 return FALSE; 4590 p->next = *rel_head; 4591 *rel_head = p; 4592 p->sec = sec; 4593 p->count = 0; 4594 p->pc_count = 0; 4595 } 4596 p->count += 1; 4597 if (!must_be_dyn_reloc (info, r_type)) 4598 p->pc_count += 1; 4599 } 4600 else 4601 { 4602 /* Track dynamic relocs needed for local syms too. 4603 We really need local syms available to do this 4604 easily. Oh well. */ 4605 struct ppc_dyn_relocs *p; 4606 struct ppc_dyn_relocs **rel_head; 4607 bfd_boolean is_ifunc; 4608 asection *s; 4609 void *vpp; 4610 Elf_Internal_Sym *isym; 4611 4612 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 4613 abfd, r_symndx); 4614 if (isym == NULL) 4615 return FALSE; 4616 4617 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 4618 if (s == NULL) 4619 s = sec; 4620 4621 vpp = &elf_section_data (s)->local_dynrel; 4622 rel_head = (struct ppc_dyn_relocs **) vpp; 4623 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC; 4624 p = *rel_head; 4625 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc) 4626 p = p->next; 4627 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc) 4628 { 4629 p = bfd_alloc (htab->elf.dynobj, sizeof *p); 4630 if (p == NULL) 4631 return FALSE; 4632 p->next = *rel_head; 4633 *rel_head = p; 4634 p->sec = sec; 4635 p->ifunc = is_ifunc; 4636 p->count = 0; 4637 } 4638 p->count += 1; 4639 } 4640 } 4641 4642 break; 4643 } 4644 } 4645 4646 return TRUE; 4647} 4648 4649/* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD 4650 and OBFD, and merge non-conflicting ones. */ 4651void 4652_bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info) 4653{ 4654 bfd *obfd = info->output_bfd; 4655 obj_attribute *in_attr, *in_attrs; 4656 obj_attribute *out_attr, *out_attrs; 4657 4658 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU]; 4659 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU]; 4660 4661 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP]; 4662 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP]; 4663 4664 if (in_attr->i != out_attr->i) 4665 { 4666 int in_fp = in_attr->i & 3; 4667 int out_fp = out_attr->i & 3; 4668 4669 if (in_fp == 0) 4670 ; 4671 else if (out_fp == 0) 4672 { 4673 out_attr->type = 1; 4674 out_attr->i ^= in_fp; 4675 } 4676 else if (out_fp != 2 && in_fp == 2) 4677 _bfd_error_handler 4678 /* xgettext:c-format */ 4679 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd); 4680 else if (out_fp == 2 && in_fp != 2) 4681 _bfd_error_handler 4682 /* xgettext:c-format */ 4683 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd); 4684 else if (out_fp == 1 && in_fp == 3) 4685 _bfd_error_handler 4686 /* xgettext:c-format */ 4687 (_("Warning: %B uses double-precision hard float, " 4688 "%B uses single-precision hard float"), obfd, ibfd); 4689 else if (out_fp == 3 && in_fp == 1) 4690 _bfd_error_handler 4691 /* xgettext:c-format */ 4692 (_("Warning: %B uses double-precision hard float, " 4693 "%B uses single-precision hard float"), ibfd, obfd); 4694 4695 in_fp = in_attr->i & 0xc; 4696 out_fp = out_attr->i & 0xc; 4697 if (in_fp == 0) 4698 ; 4699 else if (out_fp == 0) 4700 { 4701 out_attr->type = 1; 4702 out_attr->i ^= in_fp; 4703 } 4704 else if (out_fp != 2 * 4 && in_fp == 2 * 4) 4705 _bfd_error_handler 4706 /* xgettext:c-format */ 4707 (_("Warning: %B uses 64-bit long double, " 4708 "%B uses 128-bit long double"), ibfd, obfd); 4709 else if (in_fp != 2 * 4 && out_fp == 2 * 4) 4710 _bfd_error_handler 4711 /* xgettext:c-format */ 4712 (_("Warning: %B uses 64-bit long double, " 4713 "%B uses 128-bit long double"), obfd, ibfd); 4714 else if (out_fp == 1 * 4 && in_fp == 3 * 4) 4715 _bfd_error_handler 4716 /* xgettext:c-format */ 4717 (_("Warning: %B uses IBM long double, " 4718 "%B uses IEEE long double"), ibfd, obfd); 4719 else if (out_fp == 3 * 4 && in_fp == 1 * 4) 4720 _bfd_error_handler 4721 /* xgettext:c-format */ 4722 (_("Warning: %B uses IBM long double, " 4723 "%B uses IEEE long double"), obfd, ibfd); 4724 } 4725} 4726 4727/* Merge object attributes from IBFD into OBFD. Warn if 4728 there are conflicting attributes. */ 4729static bfd_boolean 4730ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info) 4731{ 4732 bfd *obfd; 4733 obj_attribute *in_attr, *in_attrs; 4734 obj_attribute *out_attr, *out_attrs; 4735 4736 _bfd_elf_ppc_merge_fp_attributes (ibfd, info); 4737 4738 obfd = info->output_bfd; 4739 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU]; 4740 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU]; 4741 4742 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and 4743 merge non-conflicting ones. */ 4744 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector]; 4745 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector]; 4746 if (in_attr->i != out_attr->i) 4747 { 4748 int in_vec = in_attr->i & 3; 4749 int out_vec = out_attr->i & 3; 4750 4751 if (in_vec == 0) 4752 ; 4753 else if (out_vec == 0) 4754 { 4755 out_attr->type = 1; 4756 out_attr->i = in_vec; 4757 } 4758 /* For now, allow generic to transition to AltiVec or SPE 4759 without a warning. If GCC marked files with their stack 4760 alignment and used don't-care markings for files which are 4761 not affected by the vector ABI, we could warn about this 4762 case too. */ 4763 else if (in_vec == 1) 4764 ; 4765 else if (out_vec == 1) 4766 { 4767 out_attr->type = 1; 4768 out_attr->i = in_vec; 4769 } 4770 else if (out_vec < in_vec) 4771 _bfd_error_handler 4772 /* xgettext:c-format */ 4773 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"), 4774 obfd, ibfd); 4775 else if (out_vec > in_vec) 4776 _bfd_error_handler 4777 /* xgettext:c-format */ 4778 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"), 4779 ibfd, obfd); 4780 } 4781 4782 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes 4783 and merge non-conflicting ones. */ 4784 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return]; 4785 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return]; 4786 if (in_attr->i != out_attr->i) 4787 { 4788 int in_struct = in_attr->i & 3; 4789 int out_struct = out_attr->i & 3; 4790 4791 if (in_struct == 0 || in_struct == 3) 4792 ; 4793 else if (out_struct == 0) 4794 { 4795 out_attr->type = 1; 4796 out_attr->i = in_struct; 4797 } 4798 else if (out_struct < in_struct) 4799 _bfd_error_handler 4800 /* xgettext:c-format */ 4801 (_("Warning: %B uses r3/r4 for small structure returns, " 4802 "%B uses memory"), obfd, ibfd); 4803 else if (out_struct > in_struct) 4804 _bfd_error_handler 4805 /* xgettext:c-format */ 4806 (_("Warning: %B uses r3/r4 for small structure returns, " 4807 "%B uses memory"), ibfd, obfd); 4808 } 4809 4810 /* Merge Tag_compatibility attributes and any common GNU ones. */ 4811 _bfd_elf_merge_object_attributes (ibfd, info); 4812 4813 return TRUE; 4814} 4815 4816/* Merge backend specific data from an object file to the output 4817 object file when linking. */ 4818 4819static bfd_boolean 4820ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 4821{ 4822 bfd *obfd = info->output_bfd; 4823 flagword old_flags; 4824 flagword new_flags; 4825 bfd_boolean error; 4826 4827 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd)) 4828 return TRUE; 4829 4830 /* Check if we have the same endianness. */ 4831 if (! _bfd_generic_verify_endian_match (ibfd, info)) 4832 return FALSE; 4833 4834 if (!ppc_elf_merge_obj_attributes (ibfd, info)) 4835 return FALSE; 4836 4837 new_flags = elf_elfheader (ibfd)->e_flags; 4838 old_flags = elf_elfheader (obfd)->e_flags; 4839 if (!elf_flags_init (obfd)) 4840 { 4841 /* First call, no flags set. */ 4842 elf_flags_init (obfd) = TRUE; 4843 elf_elfheader (obfd)->e_flags = new_flags; 4844 } 4845 4846 /* Compatible flags are ok. */ 4847 else if (new_flags == old_flags) 4848 ; 4849 4850 /* Incompatible flags. */ 4851 else 4852 { 4853 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib 4854 to be linked with either. */ 4855 error = FALSE; 4856 if ((new_flags & EF_PPC_RELOCATABLE) != 0 4857 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) 4858 { 4859 error = TRUE; 4860 _bfd_error_handler 4861 (_("%B: compiled with -mrelocatable and linked with " 4862 "modules compiled normally"), ibfd); 4863 } 4864 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 4865 && (old_flags & EF_PPC_RELOCATABLE) != 0) 4866 { 4867 error = TRUE; 4868 _bfd_error_handler 4869 (_("%B: compiled normally and linked with " 4870 "modules compiled with -mrelocatable"), ibfd); 4871 } 4872 4873 /* The output is -mrelocatable-lib iff both the input files are. */ 4874 if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) 4875 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; 4876 4877 /* The output is -mrelocatable iff it can't be -mrelocatable-lib, 4878 but each input file is either -mrelocatable or -mrelocatable-lib. */ 4879 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) 4880 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) 4881 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) 4882 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; 4883 4884 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if 4885 any module uses it. */ 4886 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); 4887 4888 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 4889 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 4890 4891 /* Warn about any other mismatches. */ 4892 if (new_flags != old_flags) 4893 { 4894 error = TRUE; 4895 _bfd_error_handler 4896 /* xgettext:c-format */ 4897 (_("%B: uses different e_flags (0x%lx) fields " 4898 "than previous modules (0x%lx)"), 4899 ibfd, (long) new_flags, (long) old_flags); 4900 } 4901 4902 if (error) 4903 { 4904 bfd_set_error (bfd_error_bad_value); 4905 return FALSE; 4906 } 4907 } 4908 4909 return TRUE; 4910} 4911 4912static void 4913ppc_elf_vle_split16 (bfd *input_bfd, 4914 asection *input_section, 4915 unsigned long offset, 4916 bfd_byte *loc, 4917 bfd_vma value, 4918 split16_format_type split16_format, 4919 bfd_boolean fixup) 4920{ 4921 unsigned int insn, opcode, top5; 4922 4923 insn = bfd_get_32 (input_bfd, loc); 4924 opcode = insn & 0xfc00f800; 4925 if (opcode == E_OR2I_INSN 4926 || opcode == E_AND2I_DOT_INSN 4927 || opcode == E_OR2IS_INSN 4928 || opcode == E_LIS_INSN 4929 || opcode == E_AND2IS_DOT_INSN) 4930 { 4931 if (split16_format != split16a_type) 4932 { 4933 if (fixup) 4934 split16_format = split16a_type; 4935 else 4936 _bfd_error_handler 4937 /* xgettext:c-format */ 4938 (_("%B(%A+0x%lx): expected 16A style relocation on 0x%08x insn"), 4939 input_bfd, input_section, offset, opcode); 4940 } 4941 } 4942 else if (opcode == E_ADD2I_DOT_INSN 4943 || opcode == E_ADD2IS_INSN 4944 || opcode == E_CMP16I_INSN 4945 || opcode == E_MULL2I_INSN 4946 || opcode == E_CMPL16I_INSN 4947 || opcode == E_CMPH16I_INSN 4948 || opcode == E_CMPHL16I_INSN) 4949 { 4950 if (split16_format != split16d_type) 4951 { 4952 if (fixup) 4953 split16_format = split16d_type; 4954 else 4955 _bfd_error_handler 4956 /* xgettext:c-format */ 4957 (_("%B(%A+0x%lx): expected 16D style relocation on 0x%08x insn"), 4958 input_bfd, input_section, offset, opcode); 4959 } 4960 } 4961 top5 = value & 0xf800; 4962 top5 = top5 << (split16_format == split16a_type ? 5 : 10); 4963 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x3e007ff); 4964 insn |= top5; 4965 insn |= value & 0x7ff; 4966 bfd_put_32 (input_bfd, insn, loc); 4967} 4968 4969/* Choose which PLT scheme to use, and set .plt flags appropriately. 4970 Returns -1 on error, 0 for old PLT, 1 for new PLT. */ 4971int 4972ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED, 4973 struct bfd_link_info *info) 4974{ 4975 struct ppc_elf_link_hash_table *htab; 4976 flagword flags; 4977 4978 htab = ppc_elf_hash_table (info); 4979 4980 if (htab->plt_type == PLT_UNSET) 4981 { 4982 struct elf_link_hash_entry *h; 4983 4984 if (htab->params->plt_style == PLT_OLD) 4985 htab->plt_type = PLT_OLD; 4986 else if (bfd_link_pic (info) 4987 && htab->elf.dynamic_sections_created 4988 && (h = elf_link_hash_lookup (&htab->elf, "_mcount", 4989 FALSE, FALSE, TRUE)) != NULL 4990 && (h->type == STT_FUNC 4991 || h->needs_plt) 4992 && h->ref_regular 4993 && !(SYMBOL_CALLS_LOCAL (info, h) 4994 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 4995 && h->root.type == bfd_link_hash_undefweak))) 4996 { 4997 /* Profiling of shared libs (and pies) is not supported with 4998 secure plt, because ppc32 does profiling before a 4999 function prologue and a secure plt pic call stubs needs 5000 r30 to be set up. */ 5001 htab->plt_type = PLT_OLD; 5002 } 5003 else 5004 { 5005 bfd *ibfd; 5006 enum ppc_elf_plt_type plt_type = htab->params->plt_style; 5007 5008 /* Look through the reloc flags left by ppc_elf_check_relocs. 5009 Use the old style bss plt if a file makes plt calls 5010 without using the new relocs, and if ld isn't given 5011 --secure-plt and we never see REL16 relocs. */ 5012 if (plt_type == PLT_UNSET) 5013 plt_type = PLT_OLD; 5014 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next) 5015 if (is_ppc_elf (ibfd)) 5016 { 5017 if (ppc_elf_tdata (ibfd)->has_rel16) 5018 plt_type = PLT_NEW; 5019 else if (ppc_elf_tdata (ibfd)->makes_plt_call) 5020 { 5021 plt_type = PLT_OLD; 5022 htab->old_bfd = ibfd; 5023 break; 5024 } 5025 } 5026 htab->plt_type = plt_type; 5027 } 5028 } 5029 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW) 5030 { 5031 if (htab->old_bfd != NULL) 5032 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"), 5033 htab->old_bfd); 5034 else 5035 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n")); 5036 } 5037 5038 BFD_ASSERT (htab->plt_type != PLT_VXWORKS); 5039 5040 if (htab->plt_type == PLT_NEW) 5041 { 5042 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 5043 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 5044 5045 /* The new PLT is a loaded section. */ 5046 if (htab->elf.splt != NULL 5047 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags)) 5048 return -1; 5049 5050 /* The new GOT is not executable. */ 5051 if (htab->elf.sgot != NULL 5052 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags)) 5053 return -1; 5054 } 5055 else 5056 { 5057 /* Stop an unused .glink section from affecting .text alignment. */ 5058 if (htab->glink != NULL 5059 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0)) 5060 return -1; 5061 } 5062 return htab->plt_type == PLT_NEW; 5063} 5064 5065/* Return the section that should be marked against GC for a given 5066 relocation. */ 5067 5068static asection * 5069ppc_elf_gc_mark_hook (asection *sec, 5070 struct bfd_link_info *info, 5071 Elf_Internal_Rela *rel, 5072 struct elf_link_hash_entry *h, 5073 Elf_Internal_Sym *sym) 5074{ 5075 if (h != NULL) 5076 switch (ELF32_R_TYPE (rel->r_info)) 5077 { 5078 case R_PPC_GNU_VTINHERIT: 5079 case R_PPC_GNU_VTENTRY: 5080 return NULL; 5081 } 5082 5083 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 5084} 5085 5086/* Update the got, plt and dynamic reloc reference counts for the 5087 section being removed. */ 5088 5089static bfd_boolean 5090ppc_elf_gc_sweep_hook (bfd *abfd, 5091 struct bfd_link_info *info, 5092 asection *sec, 5093 const Elf_Internal_Rela *relocs) 5094{ 5095 struct ppc_elf_link_hash_table *htab; 5096 Elf_Internal_Shdr *symtab_hdr; 5097 struct elf_link_hash_entry **sym_hashes; 5098 bfd_signed_vma *local_got_refcounts; 5099 const Elf_Internal_Rela *rel, *relend; 5100 asection *got2; 5101 5102 if (bfd_link_relocatable (info)) 5103 return TRUE; 5104 5105 if ((sec->flags & SEC_ALLOC) == 0) 5106 return TRUE; 5107 5108 elf_section_data (sec)->local_dynrel = NULL; 5109 5110 htab = ppc_elf_hash_table (info); 5111 symtab_hdr = &elf_symtab_hdr (abfd); 5112 sym_hashes = elf_sym_hashes (abfd); 5113 local_got_refcounts = elf_local_got_refcounts (abfd); 5114 got2 = bfd_get_section_by_name (abfd, ".got2"); 5115 5116 relend = relocs + sec->reloc_count; 5117 for (rel = relocs; rel < relend; rel++) 5118 { 5119 unsigned long r_symndx; 5120 enum elf_ppc_reloc_type r_type; 5121 struct elf_link_hash_entry *h = NULL; 5122 5123 r_symndx = ELF32_R_SYM (rel->r_info); 5124 if (r_symndx >= symtab_hdr->sh_info) 5125 { 5126 struct elf_dyn_relocs **pp, *p; 5127 struct ppc_elf_link_hash_entry *eh; 5128 5129 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 5130 while (h->root.type == bfd_link_hash_indirect 5131 || h->root.type == bfd_link_hash_warning) 5132 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5133 eh = (struct ppc_elf_link_hash_entry *) h; 5134 5135 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 5136 if (p->sec == sec) 5137 { 5138 /* Everything must go for SEC. */ 5139 *pp = p->next; 5140 break; 5141 } 5142 } 5143 5144 r_type = ELF32_R_TYPE (rel->r_info); 5145 if (!htab->is_vxworks 5146 && h == NULL 5147 && local_got_refcounts != NULL 5148 && (!bfd_link_pic (info) 5149 || is_branch_reloc (r_type))) 5150 { 5151 struct plt_entry **local_plt = (struct plt_entry **) 5152 (local_got_refcounts + symtab_hdr->sh_info); 5153 char *local_got_tls_masks = (char *) 5154 (local_plt + symtab_hdr->sh_info); 5155 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0) 5156 { 5157 struct plt_entry **ifunc = local_plt + r_symndx; 5158 bfd_vma addend = 0; 5159 struct plt_entry *ent; 5160 5161 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info)) 5162 addend = rel->r_addend; 5163 ent = find_plt_ent (ifunc, got2, addend); 5164 if (ent->plt.refcount > 0) 5165 ent->plt.refcount -= 1; 5166 continue; 5167 } 5168 } 5169 5170 switch (r_type) 5171 { 5172 case R_PPC_GOT_TLSLD16: 5173 case R_PPC_GOT_TLSLD16_LO: 5174 case R_PPC_GOT_TLSLD16_HI: 5175 case R_PPC_GOT_TLSLD16_HA: 5176 case R_PPC_GOT_TLSGD16: 5177 case R_PPC_GOT_TLSGD16_LO: 5178 case R_PPC_GOT_TLSGD16_HI: 5179 case R_PPC_GOT_TLSGD16_HA: 5180 case R_PPC_GOT_TPREL16: 5181 case R_PPC_GOT_TPREL16_LO: 5182 case R_PPC_GOT_TPREL16_HI: 5183 case R_PPC_GOT_TPREL16_HA: 5184 case R_PPC_GOT_DTPREL16: 5185 case R_PPC_GOT_DTPREL16_LO: 5186 case R_PPC_GOT_DTPREL16_HI: 5187 case R_PPC_GOT_DTPREL16_HA: 5188 case R_PPC_GOT16: 5189 case R_PPC_GOT16_LO: 5190 case R_PPC_GOT16_HI: 5191 case R_PPC_GOT16_HA: 5192 if (h != NULL) 5193 { 5194 if (h->got.refcount > 0) 5195 h->got.refcount--; 5196 if (!bfd_link_pic (info)) 5197 { 5198 struct plt_entry *ent; 5199 5200 ent = find_plt_ent (&h->plt.plist, NULL, 0); 5201 if (ent != NULL && ent->plt.refcount > 0) 5202 ent->plt.refcount -= 1; 5203 } 5204 } 5205 else if (local_got_refcounts != NULL) 5206 { 5207 if (local_got_refcounts[r_symndx] > 0) 5208 local_got_refcounts[r_symndx]--; 5209 } 5210 break; 5211 5212 case R_PPC_REL24: 5213 case R_PPC_REL14: 5214 case R_PPC_REL14_BRTAKEN: 5215 case R_PPC_REL14_BRNTAKEN: 5216 case R_PPC_REL32: 5217 if (h == NULL || h == htab->elf.hgot) 5218 break; 5219 /* Fall through. */ 5220 5221 case R_PPC_ADDR32: 5222 case R_PPC_ADDR24: 5223 case R_PPC_ADDR16: 5224 case R_PPC_ADDR16_LO: 5225 case R_PPC_ADDR16_HI: 5226 case R_PPC_ADDR16_HA: 5227 case R_PPC_ADDR14: 5228 case R_PPC_ADDR14_BRTAKEN: 5229 case R_PPC_ADDR14_BRNTAKEN: 5230 case R_PPC_UADDR32: 5231 case R_PPC_UADDR16: 5232 if (bfd_link_pic (info)) 5233 break; 5234 /* Fall through. */ 5235 5236 case R_PPC_PLT32: 5237 case R_PPC_PLTREL24: 5238 case R_PPC_PLTREL32: 5239 case R_PPC_PLT16_LO: 5240 case R_PPC_PLT16_HI: 5241 case R_PPC_PLT16_HA: 5242 if (h != NULL) 5243 { 5244 bfd_vma addend = 0; 5245 struct plt_entry *ent; 5246 5247 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info)) 5248 addend = rel->r_addend; 5249 ent = find_plt_ent (&h->plt.plist, got2, addend); 5250 if (ent != NULL && ent->plt.refcount > 0) 5251 ent->plt.refcount -= 1; 5252 } 5253 break; 5254 5255 default: 5256 break; 5257 } 5258 } 5259 return TRUE; 5260} 5261 5262/* Set plt output section type, htab->tls_get_addr, and call the 5263 generic ELF tls_setup function. */ 5264 5265asection * 5266ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) 5267{ 5268 struct ppc_elf_link_hash_table *htab; 5269 5270 htab = ppc_elf_hash_table (info); 5271 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", 5272 FALSE, FALSE, TRUE); 5273 if (htab->plt_type != PLT_NEW) 5274 htab->params->no_tls_get_addr_opt = TRUE; 5275 5276 if (!htab->params->no_tls_get_addr_opt) 5277 { 5278 struct elf_link_hash_entry *opt, *tga; 5279 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt", 5280 FALSE, FALSE, TRUE); 5281 if (opt != NULL 5282 && (opt->root.type == bfd_link_hash_defined 5283 || opt->root.type == bfd_link_hash_defweak)) 5284 { 5285 /* If glibc supports an optimized __tls_get_addr call stub, 5286 signalled by the presence of __tls_get_addr_opt, and we'll 5287 be calling __tls_get_addr via a plt call stub, then 5288 make __tls_get_addr point to __tls_get_addr_opt. */ 5289 tga = htab->tls_get_addr; 5290 if (htab->elf.dynamic_sections_created 5291 && tga != NULL 5292 && (tga->type == STT_FUNC 5293 || tga->needs_plt) 5294 && !(SYMBOL_CALLS_LOCAL (info, tga) 5295 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT 5296 && tga->root.type == bfd_link_hash_undefweak))) 5297 { 5298 struct plt_entry *ent; 5299 for (ent = tga->plt.plist; ent != NULL; ent = ent->next) 5300 if (ent->plt.refcount > 0) 5301 break; 5302 if (ent != NULL) 5303 { 5304 tga->root.type = bfd_link_hash_indirect; 5305 tga->root.u.i.link = &opt->root; 5306 ppc_elf_copy_indirect_symbol (info, opt, tga); 5307 opt->forced_local = 0; 5308 if (opt->dynindx != -1) 5309 { 5310 /* Use __tls_get_addr_opt in dynamic relocations. */ 5311 opt->dynindx = -1; 5312 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 5313 opt->dynstr_index); 5314 if (!bfd_elf_link_record_dynamic_symbol (info, opt)) 5315 return FALSE; 5316 } 5317 htab->tls_get_addr = opt; 5318 } 5319 } 5320 } 5321 else 5322 htab->params->no_tls_get_addr_opt = TRUE; 5323 } 5324 if (htab->plt_type == PLT_NEW 5325 && htab->elf.splt != NULL 5326 && htab->elf.splt->output_section != NULL) 5327 { 5328 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS; 5329 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE; 5330 } 5331 5332 return _bfd_elf_tls_setup (obfd, info); 5333} 5334 5335/* Return TRUE iff REL is a branch reloc with a global symbol matching 5336 HASH. */ 5337 5338static bfd_boolean 5339branch_reloc_hash_match (const bfd *ibfd, 5340 const Elf_Internal_Rela *rel, 5341 const struct elf_link_hash_entry *hash) 5342{ 5343 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); 5344 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info); 5345 unsigned int r_symndx = ELF32_R_SYM (rel->r_info); 5346 5347 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type)) 5348 { 5349 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); 5350 struct elf_link_hash_entry *h; 5351 5352 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 5353 while (h->root.type == bfd_link_hash_indirect 5354 || h->root.type == bfd_link_hash_warning) 5355 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5356 if (h == hash) 5357 return TRUE; 5358 } 5359 return FALSE; 5360} 5361 5362/* Run through all the TLS relocs looking for optimization 5363 opportunities. */ 5364 5365bfd_boolean 5366ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, 5367 struct bfd_link_info *info) 5368{ 5369 bfd *ibfd; 5370 asection *sec; 5371 struct ppc_elf_link_hash_table *htab; 5372 int pass; 5373 5374 if (!bfd_link_executable (info)) 5375 return TRUE; 5376 5377 htab = ppc_elf_hash_table (info); 5378 if (htab == NULL) 5379 return FALSE; 5380 5381 /* Make two passes through the relocs. First time check that tls 5382 relocs involved in setting up a tls_get_addr call are indeed 5383 followed by such a call. If they are not, don't do any tls 5384 optimization. On the second pass twiddle tls_mask flags to 5385 notify relocate_section that optimization can be done, and 5386 adjust got and plt refcounts. */ 5387 for (pass = 0; pass < 2; ++pass) 5388 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 5389 { 5390 Elf_Internal_Sym *locsyms = NULL; 5391 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); 5392 asection *got2 = bfd_get_section_by_name (ibfd, ".got2"); 5393 5394 for (sec = ibfd->sections; sec != NULL; sec = sec->next) 5395 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) 5396 { 5397 Elf_Internal_Rela *relstart, *rel, *relend; 5398 int expecting_tls_get_addr = 0; 5399 5400 /* Read the relocations. */ 5401 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, 5402 info->keep_memory); 5403 if (relstart == NULL) 5404 return FALSE; 5405 5406 relend = relstart + sec->reloc_count; 5407 for (rel = relstart; rel < relend; rel++) 5408 { 5409 enum elf_ppc_reloc_type r_type; 5410 unsigned long r_symndx; 5411 struct elf_link_hash_entry *h = NULL; 5412 char *tls_mask; 5413 char tls_set, tls_clear; 5414 bfd_boolean is_local; 5415 bfd_signed_vma *got_count; 5416 5417 r_symndx = ELF32_R_SYM (rel->r_info); 5418 if (r_symndx >= symtab_hdr->sh_info) 5419 { 5420 struct elf_link_hash_entry **sym_hashes; 5421 5422 sym_hashes = elf_sym_hashes (ibfd); 5423 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 5424 while (h->root.type == bfd_link_hash_indirect 5425 || h->root.type == bfd_link_hash_warning) 5426 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5427 } 5428 5429 is_local = FALSE; 5430 if (h == NULL 5431 || !h->def_dynamic) 5432 is_local = TRUE; 5433 5434 r_type = ELF32_R_TYPE (rel->r_info); 5435 /* If this section has old-style __tls_get_addr calls 5436 without marker relocs, then check that each 5437 __tls_get_addr call reloc is preceded by a reloc 5438 that conceivably belongs to the __tls_get_addr arg 5439 setup insn. If we don't find matching arg setup 5440 relocs, don't do any tls optimization. */ 5441 if (pass == 0 5442 && sec->has_tls_get_addr_call 5443 && h != NULL 5444 && h == htab->tls_get_addr 5445 && !expecting_tls_get_addr 5446 && is_branch_reloc (r_type)) 5447 { 5448 info->callbacks->minfo ("%H __tls_get_addr lost arg, " 5449 "TLS optimization disabled\n", 5450 ibfd, sec, rel->r_offset); 5451 if (elf_section_data (sec)->relocs != relstart) 5452 free (relstart); 5453 return TRUE; 5454 } 5455 5456 expecting_tls_get_addr = 0; 5457 switch (r_type) 5458 { 5459 case R_PPC_GOT_TLSLD16: 5460 case R_PPC_GOT_TLSLD16_LO: 5461 expecting_tls_get_addr = 1; 5462 /* Fall through. */ 5463 5464 case R_PPC_GOT_TLSLD16_HI: 5465 case R_PPC_GOT_TLSLD16_HA: 5466 /* These relocs should never be against a symbol 5467 defined in a shared lib. Leave them alone if 5468 that turns out to be the case. */ 5469 if (!is_local) 5470 continue; 5471 5472 /* LD -> LE */ 5473 tls_set = 0; 5474 tls_clear = TLS_LD; 5475 break; 5476 5477 case R_PPC_GOT_TLSGD16: 5478 case R_PPC_GOT_TLSGD16_LO: 5479 expecting_tls_get_addr = 1; 5480 /* Fall through. */ 5481 5482 case R_PPC_GOT_TLSGD16_HI: 5483 case R_PPC_GOT_TLSGD16_HA: 5484 if (is_local) 5485 /* GD -> LE */ 5486 tls_set = 0; 5487 else 5488 /* GD -> IE */ 5489 tls_set = TLS_TLS | TLS_TPRELGD; 5490 tls_clear = TLS_GD; 5491 break; 5492 5493 case R_PPC_GOT_TPREL16: 5494 case R_PPC_GOT_TPREL16_LO: 5495 case R_PPC_GOT_TPREL16_HI: 5496 case R_PPC_GOT_TPREL16_HA: 5497 if (is_local) 5498 { 5499 /* IE -> LE */ 5500 tls_set = 0; 5501 tls_clear = TLS_TPREL; 5502 break; 5503 } 5504 else 5505 continue; 5506 5507 case R_PPC_TLSGD: 5508 case R_PPC_TLSLD: 5509 expecting_tls_get_addr = 2; 5510 tls_set = 0; 5511 tls_clear = 0; 5512 break; 5513 5514 default: 5515 continue; 5516 } 5517 5518 if (pass == 0) 5519 { 5520 if (!expecting_tls_get_addr 5521 || (expecting_tls_get_addr == 1 5522 && !sec->has_tls_get_addr_call)) 5523 continue; 5524 5525 if (rel + 1 < relend 5526 && branch_reloc_hash_match (ibfd, rel + 1, 5527 htab->tls_get_addr)) 5528 continue; 5529 5530 /* Uh oh, we didn't find the expected call. We 5531 could just mark this symbol to exclude it 5532 from tls optimization but it's safer to skip 5533 the entire optimization. */ 5534 info->callbacks->minfo (_("%H arg lost __tls_get_addr, " 5535 "TLS optimization disabled\n"), 5536 ibfd, sec, rel->r_offset); 5537 if (elf_section_data (sec)->relocs != relstart) 5538 free (relstart); 5539 return TRUE; 5540 } 5541 5542 if (expecting_tls_get_addr) 5543 { 5544 struct plt_entry *ent; 5545 bfd_vma addend = 0; 5546 5547 if (bfd_link_pic (info) 5548 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24) 5549 addend = rel[1].r_addend; 5550 ent = find_plt_ent (&htab->tls_get_addr->plt.plist, 5551 got2, addend); 5552 if (ent != NULL && ent->plt.refcount > 0) 5553 ent->plt.refcount -= 1; 5554 5555 if (expecting_tls_get_addr == 2) 5556 continue; 5557 } 5558 5559 if (h != NULL) 5560 { 5561 tls_mask = &ppc_elf_hash_entry (h)->tls_mask; 5562 got_count = &h->got.refcount; 5563 } 5564 else 5565 { 5566 bfd_signed_vma *lgot_refs; 5567 struct plt_entry **local_plt; 5568 char *lgot_masks; 5569 5570 if (locsyms == NULL) 5571 { 5572 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; 5573 if (locsyms == NULL) 5574 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, 5575 symtab_hdr->sh_info, 5576 0, NULL, NULL, NULL); 5577 if (locsyms == NULL) 5578 { 5579 if (elf_section_data (sec)->relocs != relstart) 5580 free (relstart); 5581 return FALSE; 5582 } 5583 } 5584 lgot_refs = elf_local_got_refcounts (ibfd); 5585 if (lgot_refs == NULL) 5586 abort (); 5587 local_plt = (struct plt_entry **) 5588 (lgot_refs + symtab_hdr->sh_info); 5589 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); 5590 tls_mask = &lgot_masks[r_symndx]; 5591 got_count = &lgot_refs[r_symndx]; 5592 } 5593 5594 if (tls_set == 0) 5595 { 5596 /* We managed to get rid of a got entry. */ 5597 if (*got_count > 0) 5598 *got_count -= 1; 5599 } 5600 5601 *tls_mask |= tls_set; 5602 *tls_mask &= ~tls_clear; 5603 } 5604 5605 if (elf_section_data (sec)->relocs != relstart) 5606 free (relstart); 5607 } 5608 5609 if (locsyms != NULL 5610 && (symtab_hdr->contents != (unsigned char *) locsyms)) 5611 { 5612 if (!info->keep_memory) 5613 free (locsyms); 5614 else 5615 symtab_hdr->contents = (unsigned char *) locsyms; 5616 } 5617 } 5618 return TRUE; 5619} 5620 5621/* Return true if we have dynamic relocs that apply to read-only sections. */ 5622 5623static bfd_boolean 5624readonly_dynrelocs (struct elf_link_hash_entry *h) 5625{ 5626 struct elf_dyn_relocs *p; 5627 5628 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) 5629 { 5630 asection *s = p->sec->output_section; 5631 5632 if (s != NULL 5633 && ((s->flags & (SEC_READONLY | SEC_ALLOC)) 5634 == (SEC_READONLY | SEC_ALLOC))) 5635 return TRUE; 5636 } 5637 return FALSE; 5638} 5639 5640/* Adjust a symbol defined by a dynamic object and referenced by a 5641 regular object. The current definition is in some section of the 5642 dynamic object, but we're not including those sections. We have to 5643 change the definition to something the rest of the link can 5644 understand. */ 5645 5646static bfd_boolean 5647ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 5648 struct elf_link_hash_entry *h) 5649{ 5650 struct ppc_elf_link_hash_table *htab; 5651 asection *s; 5652 5653#ifdef DEBUG 5654 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", 5655 h->root.root.string); 5656#endif 5657 5658 /* Make sure we know what is going on here. */ 5659 htab = ppc_elf_hash_table (info); 5660 BFD_ASSERT (htab->elf.dynobj != NULL 5661 && (h->needs_plt 5662 || h->type == STT_GNU_IFUNC 5663 || h->u.weakdef != NULL 5664 || (h->def_dynamic 5665 && h->ref_regular 5666 && !h->def_regular))); 5667 5668 /* Deal with function syms. */ 5669 if (h->type == STT_FUNC 5670 || h->type == STT_GNU_IFUNC 5671 || h->needs_plt) 5672 { 5673 /* Clear procedure linkage table information for any symbol that 5674 won't need a .plt entry. */ 5675 struct plt_entry *ent; 5676 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 5677 if (ent->plt.refcount > 0) 5678 break; 5679 if (ent == NULL 5680 || (h->type != STT_GNU_IFUNC 5681 && (SYMBOL_CALLS_LOCAL (info, h) 5682 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 5683 && h->root.type == bfd_link_hash_undefweak)))) 5684 { 5685 /* A PLT entry is not required/allowed when: 5686 5687 1. We are not using ld.so; because then the PLT entry 5688 can't be set up, so we can't use one. In this case, 5689 ppc_elf_adjust_dynamic_symbol won't even be called. 5690 5691 2. GC has rendered the entry unused. 5692 5693 3. We know for certain that a call to this symbol 5694 will go to this object, or will remain undefined. */ 5695 h->plt.plist = NULL; 5696 h->needs_plt = 0; 5697 h->pointer_equality_needed = 0; 5698 } 5699 else 5700 { 5701 /* Taking a function's address in a read/write section 5702 doesn't require us to define the function symbol in the 5703 executable on a plt call stub. A dynamic reloc can 5704 be used instead. */ 5705 if (h->pointer_equality_needed 5706 && h->type != STT_GNU_IFUNC 5707 && !htab->is_vxworks 5708 && !ppc_elf_hash_entry (h)->has_sda_refs 5709 && !readonly_dynrelocs (h)) 5710 { 5711 h->pointer_equality_needed = 0; 5712 h->non_got_ref = 0; 5713 } 5714 5715 /* After adjust_dynamic_symbol, non_got_ref set in the 5716 non-shared case means that we have allocated space in 5717 .dynbss for the symbol and thus dyn_relocs for this 5718 symbol should be discarded. 5719 If we get here we know we are making a PLT entry for this 5720 symbol, and in an executable we'd normally resolve 5721 relocations against this symbol to the PLT entry. Allow 5722 dynamic relocs if the reference is weak, and the dynamic 5723 relocs will not cause text relocation. */ 5724 else if (!h->ref_regular_nonweak 5725 && h->non_got_ref 5726 && h->type != STT_GNU_IFUNC 5727 && !htab->is_vxworks 5728 && !ppc_elf_hash_entry (h)->has_sda_refs 5729 && !readonly_dynrelocs (h)) 5730 h->non_got_ref = 0; 5731 } 5732 h->protected_def = 0; 5733 return TRUE; 5734 } 5735 else 5736 h->plt.plist = NULL; 5737 5738 /* If this is a weak symbol, and there is a real definition, the 5739 processor independent code will have arranged for us to see the 5740 real definition first, and we can just use the same value. */ 5741 if (h->u.weakdef != NULL) 5742 { 5743 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 5744 || h->u.weakdef->root.type == bfd_link_hash_defweak); 5745 h->root.u.def.section = h->u.weakdef->root.u.def.section; 5746 h->root.u.def.value = h->u.weakdef->root.u.def.value; 5747 if (ELIMINATE_COPY_RELOCS) 5748 h->non_got_ref = h->u.weakdef->non_got_ref; 5749 return TRUE; 5750 } 5751 5752 /* This is a reference to a symbol defined by a dynamic object which 5753 is not a function. */ 5754 5755 /* If we are creating a shared library, we must presume that the 5756 only references to the symbol are via the global offset table. 5757 For such cases we need not do anything here; the relocations will 5758 be handled correctly by relocate_section. */ 5759 if (bfd_link_pic (info)) 5760 { 5761 h->protected_def = 0; 5762 return TRUE; 5763 } 5764 5765 /* If there are no references to this symbol that do not use the 5766 GOT, we don't need to generate a copy reloc. */ 5767 if (!h->non_got_ref) 5768 { 5769 h->protected_def = 0; 5770 return TRUE; 5771 } 5772 5773 /* Protected variables do not work with .dynbss. The copy in 5774 .dynbss won't be used by the shared library with the protected 5775 definition for the variable. Editing to PIC, or text relocations 5776 are preferable to an incorrect program. */ 5777 if (h->protected_def) 5778 { 5779 if (ELIMINATE_COPY_RELOCS 5780 && ppc_elf_hash_entry (h)->has_addr16_ha 5781 && ppc_elf_hash_entry (h)->has_addr16_lo 5782 && htab->params->pic_fixup == 0 5783 && info->disable_target_specific_optimizations <= 1) 5784 htab->params->pic_fixup = 1; 5785 h->non_got_ref = 0; 5786 return TRUE; 5787 } 5788 5789 /* If -z nocopyreloc was given, we won't generate them either. */ 5790 if (info->nocopyreloc) 5791 { 5792 h->non_got_ref = 0; 5793 return TRUE; 5794 } 5795 5796 /* If we didn't find any dynamic relocs in read-only sections, then 5797 we'll be keeping the dynamic relocs and avoiding the copy reloc. 5798 We can't do this if there are any small data relocations. This 5799 doesn't work on VxWorks, where we can not have dynamic 5800 relocations (other than copy and jump slot relocations) in an 5801 executable. */ 5802 if (ELIMINATE_COPY_RELOCS 5803 && !ppc_elf_hash_entry (h)->has_sda_refs 5804 && !htab->is_vxworks 5805 && !h->def_regular 5806 && !readonly_dynrelocs (h)) 5807 { 5808 h->non_got_ref = 0; 5809 return TRUE; 5810 } 5811 5812 /* We must allocate the symbol in our .dynbss section, which will 5813 become part of the .bss section of the executable. There will be 5814 an entry for this symbol in the .dynsym section. The dynamic 5815 object will contain position independent code, so all references 5816 from the dynamic object to this symbol will go through the global 5817 offset table. The dynamic linker will use the .dynsym entry to 5818 determine the address it must put in the global offset table, so 5819 both the dynamic object and the regular object will refer to the 5820 same memory location for the variable. 5821 5822 Of course, if the symbol is referenced using SDAREL relocs, we 5823 must instead allocate it in .sbss. */ 5824 5825 if (ppc_elf_hash_entry (h)->has_sda_refs) 5826 s = htab->dynsbss; 5827 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0) 5828 s = htab->elf.sdynrelro; 5829 else 5830 s = htab->elf.sdynbss; 5831 BFD_ASSERT (s != NULL); 5832 5833 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to 5834 copy the initial value out of the dynamic object and into the 5835 runtime process image. We need to remember the offset into the 5836 .rela.bss section we are going to use. */ 5837 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 5838 { 5839 asection *srel; 5840 5841 if (ppc_elf_hash_entry (h)->has_sda_refs) 5842 srel = htab->relsbss; 5843 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0) 5844 srel = htab->elf.sreldynrelro; 5845 else 5846 srel = htab->elf.srelbss; 5847 BFD_ASSERT (srel != NULL); 5848 srel->size += sizeof (Elf32_External_Rela); 5849 h->needs_copy = 1; 5850 } 5851 5852 return _bfd_elf_adjust_dynamic_copy (info, h, s); 5853} 5854 5855/* Generate a symbol to mark plt call stubs. For non-PIC code the sym is 5856 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0, 5857 specifying the addend on the plt relocation. For -fpic code, the sym 5858 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC 5859 xxxxxxxx.got2.plt_pic32.<callee>. */ 5860 5861static bfd_boolean 5862add_stub_sym (struct plt_entry *ent, 5863 struct elf_link_hash_entry *h, 5864 struct bfd_link_info *info) 5865{ 5866 struct elf_link_hash_entry *sh; 5867 size_t len1, len2, len3; 5868 char *name; 5869 const char *stub; 5870 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 5871 5872 if (bfd_link_pic (info)) 5873 stub = ".plt_pic32."; 5874 else 5875 stub = ".plt_call32."; 5876 5877 len1 = strlen (h->root.root.string); 5878 len2 = strlen (stub); 5879 len3 = 0; 5880 if (ent->sec) 5881 len3 = strlen (ent->sec->name); 5882 name = bfd_malloc (len1 + len2 + len3 + 9); 5883 if (name == NULL) 5884 return FALSE; 5885 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff); 5886 if (ent->sec) 5887 memcpy (name + 8, ent->sec->name, len3); 5888 memcpy (name + 8 + len3, stub, len2); 5889 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1); 5890 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); 5891 if (sh == NULL) 5892 return FALSE; 5893 if (sh->root.type == bfd_link_hash_new) 5894 { 5895 sh->root.type = bfd_link_hash_defined; 5896 sh->root.u.def.section = htab->glink; 5897 sh->root.u.def.value = ent->glink_offset; 5898 sh->ref_regular = 1; 5899 sh->def_regular = 1; 5900 sh->ref_regular_nonweak = 1; 5901 sh->forced_local = 1; 5902 sh->non_elf = 0; 5903 sh->root.linker_def = 1; 5904 } 5905 return TRUE; 5906} 5907 5908/* Allocate NEED contiguous space in .got, and return the offset. 5909 Handles allocation of the got header when crossing 32k. */ 5910 5911static bfd_vma 5912allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need) 5913{ 5914 bfd_vma where; 5915 unsigned int max_before_header; 5916 5917 if (htab->plt_type == PLT_VXWORKS) 5918 { 5919 where = htab->elf.sgot->size; 5920 htab->elf.sgot->size += need; 5921 } 5922 else 5923 { 5924 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764; 5925 if (need <= htab->got_gap) 5926 { 5927 where = max_before_header - htab->got_gap; 5928 htab->got_gap -= need; 5929 } 5930 else 5931 { 5932 if (htab->elf.sgot->size + need > max_before_header 5933 && htab->elf.sgot->size <= max_before_header) 5934 { 5935 htab->got_gap = max_before_header - htab->elf.sgot->size; 5936 htab->elf.sgot->size = max_before_header + htab->got_header_size; 5937 } 5938 where = htab->elf.sgot->size; 5939 htab->elf.sgot->size += need; 5940 } 5941 } 5942 return where; 5943} 5944 5945/* Allocate space in associated reloc sections for dynamic relocs. */ 5946 5947static bfd_boolean 5948allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) 5949{ 5950 struct bfd_link_info *info = inf; 5951 struct ppc_elf_link_hash_entry *eh; 5952 struct ppc_elf_link_hash_table *htab; 5953 struct elf_dyn_relocs *p; 5954 5955 if (h->root.type == bfd_link_hash_indirect) 5956 return TRUE; 5957 5958 htab = ppc_elf_hash_table (info); 5959 if (htab->elf.dynamic_sections_created 5960 || h->type == STT_GNU_IFUNC) 5961 { 5962 struct plt_entry *ent; 5963 bfd_boolean doneone = FALSE; 5964 bfd_vma plt_offset = 0, glink_offset = 0; 5965 bfd_boolean dyn; 5966 5967 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 5968 if (ent->plt.refcount > 0) 5969 { 5970 /* Make sure this symbol is output as a dynamic symbol. */ 5971 if (h->dynindx == -1 5972 && !h->forced_local 5973 && !h->def_regular 5974 && htab->elf.dynamic_sections_created) 5975 { 5976 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 5977 return FALSE; 5978 } 5979 5980 dyn = htab->elf.dynamic_sections_created; 5981 if (bfd_link_pic (info) 5982 || h->type == STT_GNU_IFUNC 5983 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)) 5984 { 5985 asection *s = htab->elf.splt; 5986 if (!dyn || h->dynindx == -1) 5987 s = htab->elf.iplt; 5988 5989 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1) 5990 { 5991 if (!doneone) 5992 { 5993 plt_offset = s->size; 5994 s->size += 4; 5995 } 5996 ent->plt.offset = plt_offset; 5997 5998 s = htab->glink; 5999 if (!doneone || bfd_link_pic (info)) 6000 { 6001 glink_offset = s->size; 6002 s->size += GLINK_ENTRY_SIZE; 6003 if (h == htab->tls_get_addr 6004 && !htab->params->no_tls_get_addr_opt) 6005 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE; 6006 } 6007 if (!doneone 6008 && !bfd_link_pic (info) 6009 && h->def_dynamic 6010 && !h->def_regular) 6011 { 6012 h->root.u.def.section = s; 6013 h->root.u.def.value = glink_offset; 6014 } 6015 ent->glink_offset = glink_offset; 6016 6017 if (htab->params->emit_stub_syms 6018 && !add_stub_sym (ent, h, info)) 6019 return FALSE; 6020 } 6021 else 6022 { 6023 if (!doneone) 6024 { 6025 /* If this is the first .plt entry, make room 6026 for the special first entry. */ 6027 if (s->size == 0) 6028 s->size += htab->plt_initial_entry_size; 6029 6030 /* The PowerPC PLT is actually composed of two 6031 parts, the first part is 2 words (for a load 6032 and a jump), and then there is a remaining 6033 word available at the end. */ 6034 plt_offset = (htab->plt_initial_entry_size 6035 + (htab->plt_slot_size 6036 * ((s->size 6037 - htab->plt_initial_entry_size) 6038 / htab->plt_entry_size))); 6039 6040 /* If this symbol is not defined in a regular 6041 file, and we are not generating a shared 6042 library, then set the symbol to this location 6043 in the .plt. This is to avoid text 6044 relocations, and is required to make 6045 function pointers compare as equal between 6046 the normal executable and the shared library. */ 6047 if (! bfd_link_pic (info) 6048 && h->def_dynamic 6049 && !h->def_regular) 6050 { 6051 h->root.u.def.section = s; 6052 h->root.u.def.value = plt_offset; 6053 } 6054 6055 /* Make room for this entry. */ 6056 s->size += htab->plt_entry_size; 6057 /* After the 8192nd entry, room for two entries 6058 is allocated. */ 6059 if (htab->plt_type == PLT_OLD 6060 && (s->size - htab->plt_initial_entry_size) 6061 / htab->plt_entry_size 6062 > PLT_NUM_SINGLE_ENTRIES) 6063 s->size += htab->plt_entry_size; 6064 } 6065 ent->plt.offset = plt_offset; 6066 } 6067 6068 /* We also need to make an entry in the .rela.plt section. */ 6069 if (!doneone) 6070 { 6071 if (!htab->elf.dynamic_sections_created 6072 || h->dynindx == -1) 6073 htab->elf.irelplt->size += sizeof (Elf32_External_Rela); 6074 else 6075 { 6076 htab->elf.srelplt->size += sizeof (Elf32_External_Rela); 6077 6078 if (htab->plt_type == PLT_VXWORKS) 6079 { 6080 /* Allocate space for the unloaded relocations. */ 6081 if (!bfd_link_pic (info) 6082 && htab->elf.dynamic_sections_created) 6083 { 6084 if (ent->plt.offset 6085 == (bfd_vma) htab->plt_initial_entry_size) 6086 { 6087 htab->srelplt2->size 6088 += (sizeof (Elf32_External_Rela) 6089 * VXWORKS_PLTRESOLVE_RELOCS); 6090 } 6091 6092 htab->srelplt2->size 6093 += (sizeof (Elf32_External_Rela) 6094 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS); 6095 } 6096 6097 /* Every PLT entry has an associated GOT entry in 6098 .got.plt. */ 6099 htab->elf.sgotplt->size += 4; 6100 } 6101 } 6102 doneone = TRUE; 6103 } 6104 } 6105 else 6106 ent->plt.offset = (bfd_vma) -1; 6107 } 6108 else 6109 ent->plt.offset = (bfd_vma) -1; 6110 6111 if (!doneone) 6112 { 6113 h->plt.plist = NULL; 6114 h->needs_plt = 0; 6115 } 6116 } 6117 else 6118 { 6119 h->plt.plist = NULL; 6120 h->needs_plt = 0; 6121 } 6122 6123 eh = (struct ppc_elf_link_hash_entry *) h; 6124 if (eh->elf.got.refcount > 0 6125 || (ELIMINATE_COPY_RELOCS 6126 && !eh->elf.def_regular 6127 && eh->elf.protected_def 6128 && eh->has_addr16_ha 6129 && eh->has_addr16_lo 6130 && htab->params->pic_fixup > 0)) 6131 { 6132 bfd_boolean dyn; 6133 unsigned int need; 6134 6135 /* Make sure this symbol is output as a dynamic symbol. */ 6136 if (eh->elf.dynindx == -1 6137 && !eh->elf.forced_local 6138 && eh->elf.type != STT_GNU_IFUNC 6139 && htab->elf.dynamic_sections_created) 6140 { 6141 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf)) 6142 return FALSE; 6143 } 6144 6145 need = 0; 6146 if ((eh->tls_mask & TLS_TLS) != 0) 6147 { 6148 if ((eh->tls_mask & TLS_LD) != 0) 6149 { 6150 if (!eh->elf.def_dynamic) 6151 /* We'll just use htab->tlsld_got.offset. This should 6152 always be the case. It's a little odd if we have 6153 a local dynamic reloc against a non-local symbol. */ 6154 htab->tlsld_got.refcount += 1; 6155 else 6156 need += 8; 6157 } 6158 if ((eh->tls_mask & TLS_GD) != 0) 6159 need += 8; 6160 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0) 6161 need += 4; 6162 if ((eh->tls_mask & TLS_DTPREL) != 0) 6163 need += 4; 6164 } 6165 else 6166 need += 4; 6167 if (need == 0) 6168 eh->elf.got.offset = (bfd_vma) -1; 6169 else 6170 { 6171 eh->elf.got.offset = allocate_got (htab, need); 6172 dyn = htab->elf.dynamic_sections_created; 6173 if ((bfd_link_pic (info) 6174 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf)) 6175 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT 6176 || eh->elf.root.type != bfd_link_hash_undefweak)) 6177 { 6178 asection *rsec = htab->elf.srelgot; 6179 6180 if (eh->elf.type == STT_GNU_IFUNC) 6181 rsec = htab->elf.irelplt; 6182 /* All the entries we allocated need relocs. 6183 Except LD only needs one. */ 6184 if ((eh->tls_mask & TLS_LD) != 0 6185 && eh->elf.def_dynamic) 6186 need -= 4; 6187 rsec->size += need * (sizeof (Elf32_External_Rela) / 4); 6188 } 6189 } 6190 } 6191 else 6192 eh->elf.got.offset = (bfd_vma) -1; 6193 6194 if (eh->dyn_relocs == NULL 6195 || !htab->elf.dynamic_sections_created) 6196 return TRUE; 6197 6198 /* In the shared -Bsymbolic case, discard space allocated for 6199 dynamic pc-relative relocs against symbols which turn out to be 6200 defined in regular objects. For the normal shared case, discard 6201 space for relocs that have become local due to symbol visibility 6202 changes. */ 6203 6204 if (bfd_link_pic (info)) 6205 { 6206 /* Relocs that use pc_count are those that appear on a call insn, 6207 or certain REL relocs (see must_be_dyn_reloc) that can be 6208 generated via assembly. We want calls to protected symbols to 6209 resolve directly to the function rather than going via the plt. 6210 If people want function pointer comparisons to work as expected 6211 then they should avoid writing weird assembly. */ 6212 if (SYMBOL_CALLS_LOCAL (info, h)) 6213 { 6214 struct elf_dyn_relocs **pp; 6215 6216 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 6217 { 6218 p->count -= p->pc_count; 6219 p->pc_count = 0; 6220 if (p->count == 0) 6221 *pp = p->next; 6222 else 6223 pp = &p->next; 6224 } 6225 } 6226 6227 if (htab->is_vxworks) 6228 { 6229 struct elf_dyn_relocs **pp; 6230 6231 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 6232 { 6233 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) 6234 *pp = p->next; 6235 else 6236 pp = &p->next; 6237 } 6238 } 6239 6240 /* Discard relocs on undefined symbols that must be local. */ 6241 if (eh->dyn_relocs != NULL 6242 && h->root.type == bfd_link_hash_undefined 6243 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN 6244 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) 6245 eh->dyn_relocs = NULL; 6246 6247 /* Also discard relocs on undefined weak syms with non-default 6248 visibility. */ 6249 if (eh->dyn_relocs != NULL 6250 && h->root.type == bfd_link_hash_undefweak) 6251 { 6252 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 6253 eh->dyn_relocs = NULL; 6254 6255 /* Make sure undefined weak symbols are output as a dynamic 6256 symbol in PIEs. */ 6257 else if (h->dynindx == -1 6258 && !h->forced_local 6259 && !h->def_regular) 6260 { 6261 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 6262 return FALSE; 6263 } 6264 } 6265 } 6266 else if (ELIMINATE_COPY_RELOCS) 6267 { 6268 /* For the non-shared case, discard space for relocs against 6269 symbols which turn out to need copy relocs or are not 6270 dynamic. */ 6271 6272 if (!h->non_got_ref 6273 && !h->def_regular 6274 && !(h->protected_def 6275 && eh->has_addr16_ha 6276 && eh->has_addr16_lo 6277 && htab->params->pic_fixup > 0)) 6278 { 6279 /* Make sure this symbol is output as a dynamic symbol. 6280 Undefined weak syms won't yet be marked as dynamic. */ 6281 if (h->dynindx == -1 6282 && !h->forced_local) 6283 { 6284 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 6285 return FALSE; 6286 } 6287 6288 /* If that succeeded, we know we'll be keeping all the 6289 relocs. */ 6290 if (h->dynindx != -1) 6291 goto keep; 6292 } 6293 6294 eh->dyn_relocs = NULL; 6295 6296 keep: ; 6297 } 6298 6299 /* Finally, allocate space. */ 6300 for (p = eh->dyn_relocs; p != NULL; p = p->next) 6301 { 6302 asection *sreloc = elf_section_data (p->sec)->sreloc; 6303 if (eh->elf.type == STT_GNU_IFUNC) 6304 sreloc = htab->elf.irelplt; 6305 sreloc->size += p->count * sizeof (Elf32_External_Rela); 6306 } 6307 6308 return TRUE; 6309} 6310 6311/* Set DF_TEXTREL if we find any dynamic relocs that apply to 6312 read-only sections. */ 6313 6314static bfd_boolean 6315maybe_set_textrel (struct elf_link_hash_entry *h, void *info) 6316{ 6317 if (h->root.type == bfd_link_hash_indirect) 6318 return TRUE; 6319 6320 if (readonly_dynrelocs (h)) 6321 { 6322 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL; 6323 6324 /* Not an error, just cut short the traversal. */ 6325 return FALSE; 6326 } 6327 return TRUE; 6328} 6329 6330static const unsigned char glink_eh_frame_cie[] = 6331{ 6332 0, 0, 0, 16, /* length. */ 6333 0, 0, 0, 0, /* id. */ 6334 1, /* CIE version. */ 6335 'z', 'R', 0, /* Augmentation string. */ 6336 4, /* Code alignment. */ 6337 0x7c, /* Data alignment. */ 6338 65, /* RA reg. */ 6339 1, /* Augmentation size. */ 6340 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */ 6341 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */ 6342}; 6343 6344/* Set the sizes of the dynamic sections. */ 6345 6346static bfd_boolean 6347ppc_elf_size_dynamic_sections (bfd *output_bfd, 6348 struct bfd_link_info *info) 6349{ 6350 struct ppc_elf_link_hash_table *htab; 6351 asection *s; 6352 bfd_boolean relocs; 6353 bfd *ibfd; 6354 6355#ifdef DEBUG 6356 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); 6357#endif 6358 6359 htab = ppc_elf_hash_table (info); 6360 BFD_ASSERT (htab->elf.dynobj != NULL); 6361 6362 if (elf_hash_table (info)->dynamic_sections_created) 6363 { 6364 /* Set the contents of the .interp section to the interpreter. */ 6365 if (bfd_link_executable (info) && !info->nointerp) 6366 { 6367 s = bfd_get_linker_section (htab->elf.dynobj, ".interp"); 6368 BFD_ASSERT (s != NULL); 6369 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 6370 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 6371 } 6372 } 6373 6374 if (htab->plt_type == PLT_OLD) 6375 htab->got_header_size = 16; 6376 else if (htab->plt_type == PLT_NEW) 6377 htab->got_header_size = 12; 6378 6379 /* Set up .got offsets for local syms, and space for local dynamic 6380 relocs. */ 6381 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 6382 { 6383 bfd_signed_vma *local_got; 6384 bfd_signed_vma *end_local_got; 6385 struct plt_entry **local_plt; 6386 struct plt_entry **end_local_plt; 6387 char *lgot_masks; 6388 bfd_size_type locsymcount; 6389 Elf_Internal_Shdr *symtab_hdr; 6390 6391 if (!is_ppc_elf (ibfd)) 6392 continue; 6393 6394 for (s = ibfd->sections; s != NULL; s = s->next) 6395 { 6396 struct ppc_dyn_relocs *p; 6397 6398 for (p = ((struct ppc_dyn_relocs *) 6399 elf_section_data (s)->local_dynrel); 6400 p != NULL; 6401 p = p->next) 6402 { 6403 if (!bfd_is_abs_section (p->sec) 6404 && bfd_is_abs_section (p->sec->output_section)) 6405 { 6406 /* Input section has been discarded, either because 6407 it is a copy of a linkonce section or due to 6408 linker script /DISCARD/, so we'll be discarding 6409 the relocs too. */ 6410 } 6411 else if (htab->is_vxworks 6412 && strcmp (p->sec->output_section->name, 6413 ".tls_vars") == 0) 6414 { 6415 /* Relocations in vxworks .tls_vars sections are 6416 handled specially by the loader. */ 6417 } 6418 else if (p->count != 0) 6419 { 6420 asection *sreloc = elf_section_data (p->sec)->sreloc; 6421 if (p->ifunc) 6422 sreloc = htab->elf.irelplt; 6423 sreloc->size += p->count * sizeof (Elf32_External_Rela); 6424 if ((p->sec->output_section->flags 6425 & (SEC_READONLY | SEC_ALLOC)) 6426 == (SEC_READONLY | SEC_ALLOC)) 6427 info->flags |= DF_TEXTREL; 6428 } 6429 } 6430 } 6431 6432 local_got = elf_local_got_refcounts (ibfd); 6433 if (!local_got) 6434 continue; 6435 6436 symtab_hdr = &elf_symtab_hdr (ibfd); 6437 locsymcount = symtab_hdr->sh_info; 6438 end_local_got = local_got + locsymcount; 6439 local_plt = (struct plt_entry **) end_local_got; 6440 end_local_plt = local_plt + locsymcount; 6441 lgot_masks = (char *) end_local_plt; 6442 6443 for (; local_got < end_local_got; ++local_got, ++lgot_masks) 6444 if (*local_got > 0) 6445 { 6446 unsigned int need = 0; 6447 if ((*lgot_masks & TLS_TLS) != 0) 6448 { 6449 if ((*lgot_masks & TLS_GD) != 0) 6450 need += 8; 6451 if ((*lgot_masks & TLS_LD) != 0) 6452 htab->tlsld_got.refcount += 1; 6453 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0) 6454 need += 4; 6455 if ((*lgot_masks & TLS_DTPREL) != 0) 6456 need += 4; 6457 } 6458 else 6459 need += 4; 6460 if (need == 0) 6461 *local_got = (bfd_vma) -1; 6462 else 6463 { 6464 *local_got = allocate_got (htab, need); 6465 if (bfd_link_pic (info)) 6466 { 6467 asection *srel = htab->elf.srelgot; 6468 if ((*lgot_masks & PLT_IFUNC) != 0) 6469 srel = htab->elf.irelplt; 6470 srel->size += need * (sizeof (Elf32_External_Rela) / 4); 6471 } 6472 } 6473 } 6474 else 6475 *local_got = (bfd_vma) -1; 6476 6477 if (htab->is_vxworks) 6478 continue; 6479 6480 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */ 6481 for (; local_plt < end_local_plt; ++local_plt) 6482 { 6483 struct plt_entry *ent; 6484 bfd_boolean doneone = FALSE; 6485 bfd_vma plt_offset = 0, glink_offset = 0; 6486 6487 for (ent = *local_plt; ent != NULL; ent = ent->next) 6488 if (ent->plt.refcount > 0) 6489 { 6490 s = htab->elf.iplt; 6491 6492 if (!doneone) 6493 { 6494 plt_offset = s->size; 6495 s->size += 4; 6496 } 6497 ent->plt.offset = plt_offset; 6498 6499 s = htab->glink; 6500 if (!doneone || bfd_link_pic (info)) 6501 { 6502 glink_offset = s->size; 6503 s->size += GLINK_ENTRY_SIZE; 6504 } 6505 ent->glink_offset = glink_offset; 6506 6507 if (!doneone) 6508 { 6509 htab->elf.irelplt->size += sizeof (Elf32_External_Rela); 6510 doneone = TRUE; 6511 } 6512 } 6513 else 6514 ent->plt.offset = (bfd_vma) -1; 6515 } 6516 } 6517 6518 /* Allocate space for global sym dynamic relocs. */ 6519 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); 6520 6521 if (htab->tlsld_got.refcount > 0) 6522 { 6523 htab->tlsld_got.offset = allocate_got (htab, 8); 6524 if (bfd_link_pic (info)) 6525 htab->elf.srelgot->size += sizeof (Elf32_External_Rela); 6526 } 6527 else 6528 htab->tlsld_got.offset = (bfd_vma) -1; 6529 6530 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS) 6531 { 6532 unsigned int g_o_t = 32768; 6533 6534 /* If we haven't allocated the header, do so now. When we get here, 6535 for old plt/got the got size will be 0 to 32764 (not allocated), 6536 or 32780 to 65536 (header allocated). For new plt/got, the 6537 corresponding ranges are 0 to 32768 and 32780 to 65536. */ 6538 if (htab->elf.sgot->size <= 32768) 6539 { 6540 g_o_t = htab->elf.sgot->size; 6541 if (htab->plt_type == PLT_OLD) 6542 g_o_t += 4; 6543 htab->elf.sgot->size += htab->got_header_size; 6544 } 6545 6546 htab->elf.hgot->root.u.def.value = g_o_t; 6547 } 6548 if (bfd_link_pic (info)) 6549 { 6550 struct elf_link_hash_entry *sda = htab->sdata[0].sym; 6551 6552 sda->root.u.def.section = htab->elf.hgot->root.u.def.section; 6553 sda->root.u.def.value = htab->elf.hgot->root.u.def.value; 6554 } 6555 if (info->emitrelocations) 6556 { 6557 struct elf_link_hash_entry *sda = htab->sdata[0].sym; 6558 6559 if (sda != NULL && sda->ref_regular) 6560 sda->root.u.def.section->flags |= SEC_KEEP; 6561 sda = htab->sdata[1].sym; 6562 if (sda != NULL && sda->ref_regular) 6563 sda->root.u.def.section->flags |= SEC_KEEP; 6564 } 6565 6566 if (htab->glink != NULL 6567 && htab->glink->size != 0 6568 && htab->elf.dynamic_sections_created) 6569 { 6570 htab->glink_pltresolve = htab->glink->size; 6571 /* Space for the branch table. ??? We don't need entries for 6572 non-dynamic symbols in this table. This case can arise with 6573 static ifuncs or forced local ifuncs. */ 6574 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4; 6575 /* Pad out to align the start of PLTresolve. */ 6576 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround 6577 ? 63 : 15); 6578 htab->glink->size += GLINK_PLTRESOLVE; 6579 6580 if (htab->params->emit_stub_syms) 6581 { 6582 struct elf_link_hash_entry *sh; 6583 sh = elf_link_hash_lookup (&htab->elf, "__glink", 6584 TRUE, FALSE, FALSE); 6585 if (sh == NULL) 6586 return FALSE; 6587 if (sh->root.type == bfd_link_hash_new) 6588 { 6589 sh->root.type = bfd_link_hash_defined; 6590 sh->root.u.def.section = htab->glink; 6591 sh->root.u.def.value = htab->glink_pltresolve; 6592 sh->ref_regular = 1; 6593 sh->def_regular = 1; 6594 sh->ref_regular_nonweak = 1; 6595 sh->forced_local = 1; 6596 sh->non_elf = 0; 6597 sh->root.linker_def = 1; 6598 } 6599 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve", 6600 TRUE, FALSE, FALSE); 6601 if (sh == NULL) 6602 return FALSE; 6603 if (sh->root.type == bfd_link_hash_new) 6604 { 6605 sh->root.type = bfd_link_hash_defined; 6606 sh->root.u.def.section = htab->glink; 6607 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE; 6608 sh->ref_regular = 1; 6609 sh->def_regular = 1; 6610 sh->ref_regular_nonweak = 1; 6611 sh->forced_local = 1; 6612 sh->non_elf = 0; 6613 sh->root.linker_def = 1; 6614 } 6615 } 6616 } 6617 6618 if (htab->glink != NULL 6619 && htab->glink->size != 0 6620 && htab->glink_eh_frame != NULL 6621 && !bfd_is_abs_section (htab->glink_eh_frame->output_section) 6622 && _bfd_elf_eh_frame_present (info)) 6623 { 6624 s = htab->glink_eh_frame; 6625 s->size = sizeof (glink_eh_frame_cie) + 20; 6626 if (bfd_link_pic (info)) 6627 { 6628 s->size += 4; 6629 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256) 6630 s->size += 4; 6631 } 6632 } 6633 6634 /* We've now determined the sizes of the various dynamic sections. 6635 Allocate memory for them. */ 6636 relocs = FALSE; 6637 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next) 6638 { 6639 bfd_boolean strip_section = TRUE; 6640 6641 if ((s->flags & SEC_LINKER_CREATED) == 0) 6642 continue; 6643 6644 if (s == htab->elf.splt 6645 || s == htab->elf.sgot) 6646 { 6647 /* We'd like to strip these sections if they aren't needed, but if 6648 we've exported dynamic symbols from them we must leave them. 6649 It's too late to tell BFD to get rid of the symbols. */ 6650 if (htab->elf.hplt != NULL) 6651 strip_section = FALSE; 6652 /* Strip this section if we don't need it; see the 6653 comment below. */ 6654 } 6655 else if (s == htab->elf.iplt 6656 || s == htab->glink 6657 || s == htab->glink_eh_frame 6658 || s == htab->elf.sgotplt 6659 || s == htab->sbss 6660 || s == htab->elf.sdynbss 6661 || s == htab->elf.sdynrelro 6662 || s == htab->dynsbss) 6663 { 6664 /* Strip these too. */ 6665 } 6666 else if (s == htab->sdata[0].section 6667 || s == htab->sdata[1].section) 6668 { 6669 strip_section = (s->flags & SEC_KEEP) == 0; 6670 } 6671 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s), 6672 ".rela")) 6673 { 6674 if (s->size != 0) 6675 { 6676 /* Remember whether there are any relocation sections. */ 6677 relocs = TRUE; 6678 6679 /* We use the reloc_count field as a counter if we need 6680 to copy relocs into the output file. */ 6681 s->reloc_count = 0; 6682 } 6683 } 6684 else 6685 { 6686 /* It's not one of our sections, so don't allocate space. */ 6687 continue; 6688 } 6689 6690 if (s->size == 0 && strip_section) 6691 { 6692 /* If we don't need this section, strip it from the 6693 output file. This is mostly to handle .rela.bss and 6694 .rela.plt. We must create both sections in 6695 create_dynamic_sections, because they must be created 6696 before the linker maps input sections to output 6697 sections. The linker does that before 6698 adjust_dynamic_symbol is called, and it is that 6699 function which decides whether anything needs to go 6700 into these sections. */ 6701 s->flags |= SEC_EXCLUDE; 6702 continue; 6703 } 6704 6705 if ((s->flags & SEC_HAS_CONTENTS) == 0) 6706 continue; 6707 6708 /* Allocate memory for the section contents. */ 6709 s->contents = bfd_zalloc (htab->elf.dynobj, s->size); 6710 if (s->contents == NULL) 6711 return FALSE; 6712 } 6713 6714 if (htab->elf.dynamic_sections_created) 6715 { 6716 /* Add some entries to the .dynamic section. We fill in the 6717 values later, in ppc_elf_finish_dynamic_sections, but we 6718 must add the entries now so that we get the correct size for 6719 the .dynamic section. The DT_DEBUG entry is filled in by the 6720 dynamic linker and used by the debugger. */ 6721#define add_dynamic_entry(TAG, VAL) \ 6722 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 6723 6724 if (bfd_link_executable (info)) 6725 { 6726 if (!add_dynamic_entry (DT_DEBUG, 0)) 6727 return FALSE; 6728 } 6729 6730 if (htab->elf.splt != NULL && htab->elf.splt->size != 0) 6731 { 6732 if (!add_dynamic_entry (DT_PLTGOT, 0) 6733 || !add_dynamic_entry (DT_PLTRELSZ, 0) 6734 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 6735 || !add_dynamic_entry (DT_JMPREL, 0)) 6736 return FALSE; 6737 } 6738 6739 if (htab->plt_type == PLT_NEW 6740 && htab->glink != NULL 6741 && htab->glink->size != 0) 6742 { 6743 if (!add_dynamic_entry (DT_PPC_GOT, 0)) 6744 return FALSE; 6745 if (!htab->params->no_tls_get_addr_opt 6746 && htab->tls_get_addr != NULL 6747 && htab->tls_get_addr->plt.plist != NULL 6748 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS)) 6749 return FALSE; 6750 } 6751 6752 if (relocs) 6753 { 6754 if (!add_dynamic_entry (DT_RELA, 0) 6755 || !add_dynamic_entry (DT_RELASZ, 0) 6756 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 6757 return FALSE; 6758 } 6759 6760 /* If any dynamic relocs apply to a read-only section, then we 6761 need a DT_TEXTREL entry. */ 6762 if ((info->flags & DF_TEXTREL) == 0) 6763 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel, 6764 info); 6765 6766 if ((info->flags & DF_TEXTREL) != 0) 6767 { 6768 if (!add_dynamic_entry (DT_TEXTREL, 0)) 6769 return FALSE; 6770 } 6771 if (htab->is_vxworks 6772 && !elf_vxworks_add_dynamic_entries (output_bfd, info)) 6773 return FALSE; 6774 } 6775#undef add_dynamic_entry 6776 6777 if (htab->glink_eh_frame != NULL 6778 && htab->glink_eh_frame->contents != NULL) 6779 { 6780 unsigned char *p = htab->glink_eh_frame->contents; 6781 bfd_vma val; 6782 6783 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie)); 6784 /* CIE length (rewrite in case little-endian). */ 6785 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p); 6786 p += sizeof (glink_eh_frame_cie); 6787 /* FDE length. */ 6788 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie); 6789 bfd_put_32 (htab->elf.dynobj, val, p); 6790 p += 4; 6791 /* CIE pointer. */ 6792 val = p - htab->glink_eh_frame->contents; 6793 bfd_put_32 (htab->elf.dynobj, val, p); 6794 p += 4; 6795 /* Offset to .glink. Set later. */ 6796 p += 4; 6797 /* .glink size. */ 6798 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p); 6799 p += 4; 6800 /* Augmentation. */ 6801 p += 1; 6802 6803 if (bfd_link_pic (info) 6804 && htab->elf.dynamic_sections_created) 6805 { 6806 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2; 6807 if (adv < 64) 6808 *p++ = DW_CFA_advance_loc + adv; 6809 else if (adv < 256) 6810 { 6811 *p++ = DW_CFA_advance_loc1; 6812 *p++ = adv; 6813 } 6814 else if (adv < 65536) 6815 { 6816 *p++ = DW_CFA_advance_loc2; 6817 bfd_put_16 (htab->elf.dynobj, adv, p); 6818 p += 2; 6819 } 6820 else 6821 { 6822 *p++ = DW_CFA_advance_loc4; 6823 bfd_put_32 (htab->elf.dynobj, adv, p); 6824 p += 4; 6825 } 6826 *p++ = DW_CFA_register; 6827 *p++ = 65; 6828 p++; 6829 *p++ = DW_CFA_advance_loc + 4; 6830 *p++ = DW_CFA_restore_extended; 6831 *p++ = 65; 6832 } 6833 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4) 6834 == htab->glink_eh_frame->size); 6835 } 6836 6837 return TRUE; 6838} 6839 6840/* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output 6841 if it looks like nothing is using them. */ 6842 6843static void 6844maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect) 6845{ 6846 struct elf_link_hash_entry *sda = lsect->sym; 6847 6848 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1) 6849 { 6850 asection *s; 6851 6852 s = bfd_get_section_by_name (output_bfd, lsect->name); 6853 if (s == NULL || bfd_section_removed_from_list (output_bfd, s)) 6854 { 6855 s = bfd_get_section_by_name (output_bfd, lsect->bss_name); 6856 if (s == NULL || bfd_section_removed_from_list (output_bfd, s)) 6857 { 6858 sda->def_regular = 0; 6859 /* This is somewhat magic. See elf_link_output_extsym. */ 6860 sda->ref_dynamic = 1; 6861 sda->forced_local = 0; 6862 } 6863 } 6864 } 6865} 6866 6867void 6868ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info) 6869{ 6870 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 6871 6872 if (htab != NULL) 6873 { 6874 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]); 6875 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]); 6876 } 6877} 6878 6879 6880/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ 6881 6882static bfd_boolean 6883ppc_elf_hash_symbol (struct elf_link_hash_entry *h) 6884{ 6885 if (h->plt.plist != NULL 6886 && !h->def_regular 6887 && (!h->pointer_equality_needed 6888 || !h->ref_regular_nonweak)) 6889 return FALSE; 6890 6891 return _bfd_elf_hash_symbol (h); 6892} 6893 6894#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) 6895 6896/* Relaxation trampolines. r12 is available for clobbering (r11, is 6897 used for some functions that are allowed to break the ABI). */ 6898static const int shared_stub_entry[] = 6899 { 6900 0x7c0802a6, /* mflr 0 */ 6901 0x429f0005, /* bcl 20, 31, .Lxxx */ 6902 0x7d8802a6, /* mflr 12 */ 6903 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */ 6904 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */ 6905 0x7c0803a6, /* mtlr 0 */ 6906 0x7d8903a6, /* mtctr 12 */ 6907 0x4e800420, /* bctr */ 6908 }; 6909 6910static const int stub_entry[] = 6911 { 6912 0x3d800000, /* lis 12,xxx@ha */ 6913 0x398c0000, /* addi 12,12,xxx@l */ 6914 0x7d8903a6, /* mtctr 12 */ 6915 0x4e800420, /* bctr */ 6916 }; 6917 6918struct ppc_elf_relax_info 6919{ 6920 unsigned int workaround_size; 6921 unsigned int picfixup_size; 6922}; 6923 6924/* This function implements long branch trampolines, and the ppc476 6925 icache bug workaround. Any section needing trampolines or patch 6926 space for the workaround has its size extended so that we can 6927 add trampolines at the end of the section. */ 6928 6929static bfd_boolean 6930ppc_elf_relax_section (bfd *abfd, 6931 asection *isec, 6932 struct bfd_link_info *link_info, 6933 bfd_boolean *again) 6934{ 6935 struct one_branch_fixup 6936 { 6937 struct one_branch_fixup *next; 6938 asection *tsec; 6939 /* Final link, can use the symbol offset. For a 6940 relocatable link we use the symbol's index. */ 6941 bfd_vma toff; 6942 bfd_vma trampoff; 6943 }; 6944 6945 Elf_Internal_Shdr *symtab_hdr; 6946 bfd_byte *contents = NULL; 6947 Elf_Internal_Sym *isymbuf = NULL; 6948 Elf_Internal_Rela *internal_relocs = NULL; 6949 Elf_Internal_Rela *irel, *irelend = NULL; 6950 struct one_branch_fixup *branch_fixups = NULL; 6951 struct ppc_elf_relax_info *relax_info = NULL; 6952 unsigned changes = 0; 6953 bfd_boolean workaround_change; 6954 struct ppc_elf_link_hash_table *htab; 6955 bfd_size_type trampbase, trampoff, newsize, picfixup_size; 6956 asection *got2; 6957 bfd_boolean maybe_pasted; 6958 6959 *again = FALSE; 6960 6961 /* No need to do anything with non-alloc or non-code sections. */ 6962 if ((isec->flags & SEC_ALLOC) == 0 6963 || (isec->flags & SEC_CODE) == 0 6964 || (isec->flags & SEC_LINKER_CREATED) != 0 6965 || isec->size < 4) 6966 return TRUE; 6967 6968 /* We cannot represent the required PIC relocs in the output, so don't 6969 do anything. The linker doesn't support mixing -shared and -r 6970 anyway. */ 6971 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info)) 6972 return TRUE; 6973 6974 htab = ppc_elf_hash_table (link_info); 6975 if (htab == NULL) 6976 return TRUE; 6977 6978 isec->size = (isec->size + 3) & -4; 6979 if (isec->rawsize == 0) 6980 isec->rawsize = isec->size; 6981 trampbase = isec->size; 6982 6983 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE 6984 || isec->sec_info_type == SEC_INFO_TYPE_TARGET); 6985 isec->sec_info_type = SEC_INFO_TYPE_TARGET; 6986 6987 if (htab->params->ppc476_workaround 6988 || htab->params->pic_fixup > 0) 6989 { 6990 if (elf_section_data (isec)->sec_info == NULL) 6991 { 6992 elf_section_data (isec)->sec_info 6993 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info)); 6994 if (elf_section_data (isec)->sec_info == NULL) 6995 return FALSE; 6996 } 6997 relax_info = elf_section_data (isec)->sec_info; 6998 trampbase -= relax_info->workaround_size; 6999 } 7000 7001 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0 7002 || strcmp (isec->output_section->name, ".fini") == 0); 7003 /* Space for a branch around any trampolines. */ 7004 trampoff = trampbase; 7005 if (maybe_pasted && trampbase == isec->rawsize) 7006 trampoff += 4; 7007 7008 symtab_hdr = &elf_symtab_hdr (abfd); 7009 picfixup_size = 0; 7010 if (htab->params->branch_trampolines 7011 || htab->params->pic_fixup > 0) 7012 { 7013 /* Get a copy of the native relocations. */ 7014 if (isec->reloc_count != 0) 7015 { 7016 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, 7017 link_info->keep_memory); 7018 if (internal_relocs == NULL) 7019 goto error_return; 7020 } 7021 7022 got2 = bfd_get_section_by_name (abfd, ".got2"); 7023 7024 irelend = internal_relocs + isec->reloc_count; 7025 for (irel = internal_relocs; irel < irelend; irel++) 7026 { 7027 unsigned long r_type = ELF32_R_TYPE (irel->r_info); 7028 bfd_vma toff, roff; 7029 asection *tsec; 7030 struct one_branch_fixup *f; 7031 size_t insn_offset = 0; 7032 bfd_vma max_branch_offset = 0, val; 7033 bfd_byte *hit_addr; 7034 unsigned long t0; 7035 struct elf_link_hash_entry *h; 7036 struct plt_entry **plist; 7037 unsigned char sym_type; 7038 7039 switch (r_type) 7040 { 7041 case R_PPC_REL24: 7042 case R_PPC_LOCAL24PC: 7043 case R_PPC_PLTREL24: 7044 max_branch_offset = 1 << 25; 7045 break; 7046 7047 case R_PPC_REL14: 7048 case R_PPC_REL14_BRTAKEN: 7049 case R_PPC_REL14_BRNTAKEN: 7050 max_branch_offset = 1 << 15; 7051 break; 7052 7053 case R_PPC_ADDR16_HA: 7054 if (htab->params->pic_fixup > 0) 7055 break; 7056 continue; 7057 7058 default: 7059 continue; 7060 } 7061 7062 /* Get the value of the symbol referred to by the reloc. */ 7063 h = NULL; 7064 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 7065 { 7066 /* A local symbol. */ 7067 Elf_Internal_Sym *isym; 7068 7069 /* Read this BFD's local symbols. */ 7070 if (isymbuf == NULL) 7071 { 7072 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 7073 if (isymbuf == NULL) 7074 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 7075 symtab_hdr->sh_info, 0, 7076 NULL, NULL, NULL); 7077 if (isymbuf == 0) 7078 goto error_return; 7079 } 7080 isym = isymbuf + ELF32_R_SYM (irel->r_info); 7081 if (isym->st_shndx == SHN_UNDEF) 7082 tsec = bfd_und_section_ptr; 7083 else if (isym->st_shndx == SHN_ABS) 7084 tsec = bfd_abs_section_ptr; 7085 else if (isym->st_shndx == SHN_COMMON) 7086 tsec = bfd_com_section_ptr; 7087 else 7088 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); 7089 7090 toff = isym->st_value; 7091 sym_type = ELF_ST_TYPE (isym->st_info); 7092 } 7093 else 7094 { 7095 /* Global symbol handling. */ 7096 unsigned long indx; 7097 7098 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 7099 h = elf_sym_hashes (abfd)[indx]; 7100 7101 while (h->root.type == bfd_link_hash_indirect 7102 || h->root.type == bfd_link_hash_warning) 7103 h = (struct elf_link_hash_entry *) h->root.u.i.link; 7104 7105 if (h->root.type == bfd_link_hash_defined 7106 || h->root.type == bfd_link_hash_defweak) 7107 { 7108 tsec = h->root.u.def.section; 7109 toff = h->root.u.def.value; 7110 } 7111 else if (h->root.type == bfd_link_hash_undefined 7112 || h->root.type == bfd_link_hash_undefweak) 7113 { 7114 tsec = bfd_und_section_ptr; 7115 toff = bfd_link_relocatable (link_info) ? indx : 0; 7116 } 7117 else 7118 continue; 7119 7120 /* If this branch is to __tls_get_addr then we may later 7121 optimise away the call. We won't be needing a long- 7122 branch stub in that case. */ 7123 if (bfd_link_executable (link_info) 7124 && h == htab->tls_get_addr 7125 && irel != internal_relocs) 7126 { 7127 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info); 7128 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info); 7129 unsigned int tls_mask = 0; 7130 7131 /* The previous reloc should be one of R_PPC_TLSGD or 7132 R_PPC_TLSLD, or for older object files, a reloc 7133 on the __tls_get_addr arg setup insn. Get tls 7134 mask bits from the symbol on that reloc. */ 7135 if (t_symndx < symtab_hdr->sh_info) 7136 { 7137 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd); 7138 7139 if (local_got_offsets != NULL) 7140 { 7141 struct plt_entry **local_plt = (struct plt_entry **) 7142 (local_got_offsets + symtab_hdr->sh_info); 7143 char *lgot_masks = (char *) 7144 (local_plt + symtab_hdr->sh_info); 7145 tls_mask = lgot_masks[t_symndx]; 7146 } 7147 } 7148 else 7149 { 7150 struct elf_link_hash_entry *th 7151 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info]; 7152 7153 while (th->root.type == bfd_link_hash_indirect 7154 || th->root.type == bfd_link_hash_warning) 7155 th = (struct elf_link_hash_entry *) th->root.u.i.link; 7156 7157 tls_mask 7158 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask; 7159 } 7160 7161 /* The mask bits tell us if the call will be 7162 optimised away. */ 7163 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0 7164 && (t_rtype == R_PPC_TLSGD 7165 || t_rtype == R_PPC_GOT_TLSGD16 7166 || t_rtype == R_PPC_GOT_TLSGD16_LO)) 7167 continue; 7168 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0 7169 && (t_rtype == R_PPC_TLSLD 7170 || t_rtype == R_PPC_GOT_TLSLD16 7171 || t_rtype == R_PPC_GOT_TLSLD16_LO)) 7172 continue; 7173 } 7174 7175 sym_type = h->type; 7176 } 7177 7178 if (r_type == R_PPC_ADDR16_HA) 7179 { 7180 if (h != NULL 7181 && !h->def_regular 7182 && h->protected_def 7183 && ppc_elf_hash_entry (h)->has_addr16_ha 7184 && ppc_elf_hash_entry (h)->has_addr16_lo) 7185 picfixup_size += 12; 7186 continue; 7187 } 7188 7189 /* The condition here under which we call find_plt_ent must 7190 match that in relocate_section. If we call find_plt_ent here 7191 but not in relocate_section, or vice versa, then the branch 7192 destination used here may be incorrect. */ 7193 plist = NULL; 7194 if (h != NULL) 7195 { 7196 /* We know is_branch_reloc (r_type) is true. */ 7197 if (h->type == STT_GNU_IFUNC 7198 || r_type == R_PPC_PLTREL24) 7199 plist = &h->plt.plist; 7200 } 7201 else if (sym_type == STT_GNU_IFUNC 7202 && elf_local_got_offsets (abfd) != NULL) 7203 { 7204 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd); 7205 struct plt_entry **local_plt = (struct plt_entry **) 7206 (local_got_offsets + symtab_hdr->sh_info); 7207 plist = local_plt + ELF32_R_SYM (irel->r_info); 7208 } 7209 if (plist != NULL) 7210 { 7211 bfd_vma addend = 0; 7212 struct plt_entry *ent; 7213 7214 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info)) 7215 addend = irel->r_addend; 7216 ent = find_plt_ent (plist, got2, addend); 7217 if (ent != NULL) 7218 { 7219 if (htab->plt_type == PLT_NEW 7220 || h == NULL 7221 || !htab->elf.dynamic_sections_created 7222 || h->dynindx == -1) 7223 { 7224 tsec = htab->glink; 7225 toff = ent->glink_offset; 7226 } 7227 else 7228 { 7229 tsec = htab->elf.splt; 7230 toff = ent->plt.offset; 7231 } 7232 } 7233 } 7234 7235 /* If the branch and target are in the same section, you have 7236 no hope of adding stubs. We'll error out later should the 7237 branch overflow. */ 7238 if (tsec == isec) 7239 continue; 7240 7241 /* There probably isn't any reason to handle symbols in 7242 SEC_MERGE sections; SEC_MERGE doesn't seem a likely 7243 attribute for a code section, and we are only looking at 7244 branches. However, implement it correctly here as a 7245 reference for other target relax_section functions. */ 7246 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE) 7247 { 7248 /* At this stage in linking, no SEC_MERGE symbol has been 7249 adjusted, so all references to such symbols need to be 7250 passed through _bfd_merged_section_offset. (Later, in 7251 relocate_section, all SEC_MERGE symbols *except* for 7252 section symbols have been adjusted.) 7253 7254 gas may reduce relocations against symbols in SEC_MERGE 7255 sections to a relocation against the section symbol when 7256 the original addend was zero. When the reloc is against 7257 a section symbol we should include the addend in the 7258 offset passed to _bfd_merged_section_offset, since the 7259 location of interest is the original symbol. On the 7260 other hand, an access to "sym+addend" where "sym" is not 7261 a section symbol should not include the addend; Such an 7262 access is presumed to be an offset from "sym"; The 7263 location of interest is just "sym". */ 7264 if (sym_type == STT_SECTION) 7265 toff += irel->r_addend; 7266 7267 toff 7268 = _bfd_merged_section_offset (abfd, &tsec, 7269 elf_section_data (tsec)->sec_info, 7270 toff); 7271 7272 if (sym_type != STT_SECTION) 7273 toff += irel->r_addend; 7274 } 7275 /* PLTREL24 addends are special. */ 7276 else if (r_type != R_PPC_PLTREL24) 7277 toff += irel->r_addend; 7278 7279 /* Attempted -shared link of non-pic code loses. */ 7280 if ((!bfd_link_relocatable (link_info) 7281 && tsec == bfd_und_section_ptr) 7282 || tsec->output_section == NULL 7283 || (tsec->owner != NULL 7284 && (tsec->owner->flags & BFD_PLUGIN) != 0)) 7285 continue; 7286 7287 roff = irel->r_offset; 7288 7289 /* If the branch is in range, no need to do anything. */ 7290 if (tsec != bfd_und_section_ptr 7291 && (!bfd_link_relocatable (link_info) 7292 /* A relocatable link may have sections moved during 7293 final link, so do not presume they remain in range. */ 7294 || tsec->output_section == isec->output_section)) 7295 { 7296 bfd_vma symaddr, reladdr; 7297 7298 symaddr = tsec->output_section->vma + tsec->output_offset + toff; 7299 reladdr = isec->output_section->vma + isec->output_offset + roff; 7300 if (symaddr - reladdr + max_branch_offset 7301 < 2 * max_branch_offset) 7302 continue; 7303 } 7304 7305 /* Look for an existing fixup to this address. */ 7306 for (f = branch_fixups; f ; f = f->next) 7307 if (f->tsec == tsec && f->toff == toff) 7308 break; 7309 7310 if (f == NULL) 7311 { 7312 size_t size; 7313 unsigned long stub_rtype; 7314 7315 val = trampoff - roff; 7316 if (val >= max_branch_offset) 7317 /* Oh dear, we can't reach a trampoline. Don't try to add 7318 one. We'll report an error later. */ 7319 continue; 7320 7321 if (bfd_link_pic (link_info)) 7322 { 7323 size = 4 * ARRAY_SIZE (shared_stub_entry); 7324 insn_offset = 12; 7325 } 7326 else 7327 { 7328 size = 4 * ARRAY_SIZE (stub_entry); 7329 insn_offset = 0; 7330 } 7331 stub_rtype = R_PPC_RELAX; 7332 if (tsec == htab->elf.splt 7333 || tsec == htab->glink) 7334 { 7335 stub_rtype = R_PPC_RELAX_PLT; 7336 if (r_type == R_PPC_PLTREL24) 7337 stub_rtype = R_PPC_RELAX_PLTREL24; 7338 } 7339 7340 /* Hijack the old relocation. Since we need two 7341 relocations for this use a "composite" reloc. */ 7342 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 7343 stub_rtype); 7344 irel->r_offset = trampoff + insn_offset; 7345 if (r_type == R_PPC_PLTREL24 7346 && stub_rtype != R_PPC_RELAX_PLTREL24) 7347 irel->r_addend = 0; 7348 7349 /* Record the fixup so we don't do it again this section. */ 7350 f = bfd_malloc (sizeof (*f)); 7351 f->next = branch_fixups; 7352 f->tsec = tsec; 7353 f->toff = toff; 7354 f->trampoff = trampoff; 7355 branch_fixups = f; 7356 7357 trampoff += size; 7358 changes++; 7359 } 7360 else 7361 { 7362 val = f->trampoff - roff; 7363 if (val >= max_branch_offset) 7364 continue; 7365 7366 /* Nop out the reloc, since we're finalizing things here. */ 7367 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); 7368 } 7369 7370 /* Get the section contents. */ 7371 if (contents == NULL) 7372 { 7373 /* Get cached copy if it exists. */ 7374 if (elf_section_data (isec)->this_hdr.contents != NULL) 7375 contents = elf_section_data (isec)->this_hdr.contents; 7376 /* Go get them off disk. */ 7377 else if (!bfd_malloc_and_get_section (abfd, isec, &contents)) 7378 goto error_return; 7379 } 7380 7381 /* Fix up the existing branch to hit the trampoline. */ 7382 hit_addr = contents + roff; 7383 switch (r_type) 7384 { 7385 case R_PPC_REL24: 7386 case R_PPC_LOCAL24PC: 7387 case R_PPC_PLTREL24: 7388 t0 = bfd_get_32 (abfd, hit_addr); 7389 t0 &= ~0x3fffffc; 7390 t0 |= val & 0x3fffffc; 7391 bfd_put_32 (abfd, t0, hit_addr); 7392 break; 7393 7394 case R_PPC_REL14: 7395 case R_PPC_REL14_BRTAKEN: 7396 case R_PPC_REL14_BRNTAKEN: 7397 t0 = bfd_get_32 (abfd, hit_addr); 7398 t0 &= ~0xfffc; 7399 t0 |= val & 0xfffc; 7400 bfd_put_32 (abfd, t0, hit_addr); 7401 break; 7402 } 7403 } 7404 7405 while (branch_fixups != NULL) 7406 { 7407 struct one_branch_fixup *f = branch_fixups; 7408 branch_fixups = branch_fixups->next; 7409 free (f); 7410 } 7411 } 7412 7413 workaround_change = FALSE; 7414 newsize = trampoff; 7415 if (htab->params->ppc476_workaround 7416 && (!bfd_link_relocatable (link_info) 7417 || isec->output_section->alignment_power >= htab->params->pagesize_p2)) 7418 { 7419 bfd_vma addr, end_addr; 7420 unsigned int crossings; 7421 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; 7422 7423 addr = isec->output_section->vma + isec->output_offset; 7424 end_addr = addr + trampoff; 7425 addr &= -pagesize; 7426 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2; 7427 if (crossings != 0) 7428 { 7429 /* Keep space aligned, to ensure the patch code itself does 7430 not cross a page. Don't decrease size calculated on a 7431 previous pass as otherwise we might never settle on a layout. */ 7432 newsize = 15 - ((end_addr - 1) & 15); 7433 newsize += crossings * 16; 7434 if (relax_info->workaround_size < newsize) 7435 { 7436 relax_info->workaround_size = newsize; 7437 workaround_change = TRUE; 7438 } 7439 /* Ensure relocate_section is called. */ 7440 isec->flags |= SEC_RELOC; 7441 } 7442 newsize = trampoff + relax_info->workaround_size; 7443 } 7444 7445 if (htab->params->pic_fixup > 0) 7446 { 7447 picfixup_size -= relax_info->picfixup_size; 7448 if (picfixup_size != 0) 7449 relax_info->picfixup_size += picfixup_size; 7450 newsize += relax_info->picfixup_size; 7451 } 7452 7453 if (changes != 0 || picfixup_size != 0 || workaround_change) 7454 isec->size = newsize; 7455 7456 if (isymbuf != NULL 7457 && symtab_hdr->contents != (unsigned char *) isymbuf) 7458 { 7459 if (! link_info->keep_memory) 7460 free (isymbuf); 7461 else 7462 { 7463 /* Cache the symbols for elf_link_input_bfd. */ 7464 symtab_hdr->contents = (unsigned char *) isymbuf; 7465 } 7466 } 7467 7468 if (contents != NULL 7469 && elf_section_data (isec)->this_hdr.contents != contents) 7470 { 7471 if (!changes && !link_info->keep_memory) 7472 free (contents); 7473 else 7474 { 7475 /* Cache the section contents for elf_link_input_bfd. */ 7476 elf_section_data (isec)->this_hdr.contents = contents; 7477 } 7478 } 7479 7480 changes += picfixup_size; 7481 if (changes != 0) 7482 { 7483 /* Append sufficient NOP relocs so we can write out relocation 7484 information for the trampolines. */ 7485 Elf_Internal_Shdr *rel_hdr; 7486 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count) 7487 * sizeof (*new_relocs)); 7488 unsigned ix; 7489 7490 if (!new_relocs) 7491 goto error_return; 7492 memcpy (new_relocs, internal_relocs, 7493 isec->reloc_count * sizeof (*new_relocs)); 7494 for (ix = changes; ix--;) 7495 { 7496 irel = new_relocs + ix + isec->reloc_count; 7497 7498 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); 7499 } 7500 if (internal_relocs != elf_section_data (isec)->relocs) 7501 free (internal_relocs); 7502 elf_section_data (isec)->relocs = new_relocs; 7503 isec->reloc_count += changes; 7504 rel_hdr = _bfd_elf_single_rel_hdr (isec); 7505 rel_hdr->sh_size += changes * rel_hdr->sh_entsize; 7506 } 7507 else if (internal_relocs != NULL 7508 && elf_section_data (isec)->relocs != internal_relocs) 7509 free (internal_relocs); 7510 7511 *again = changes != 0 || workaround_change; 7512 return TRUE; 7513 7514 error_return: 7515 while (branch_fixups != NULL) 7516 { 7517 struct one_branch_fixup *f = branch_fixups; 7518 branch_fixups = branch_fixups->next; 7519 free (f); 7520 } 7521 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) 7522 free (isymbuf); 7523 if (contents != NULL 7524 && elf_section_data (isec)->this_hdr.contents != contents) 7525 free (contents); 7526 if (internal_relocs != NULL 7527 && elf_section_data (isec)->relocs != internal_relocs) 7528 free (internal_relocs); 7529 return FALSE; 7530} 7531 7532/* What to do when ld finds relocations against symbols defined in 7533 discarded sections. */ 7534 7535static unsigned int 7536ppc_elf_action_discarded (asection *sec) 7537{ 7538 if (strcmp (".fixup", sec->name) == 0) 7539 return 0; 7540 7541 if (strcmp (".got2", sec->name) == 0) 7542 return 0; 7543 7544 return _bfd_elf_default_action_discarded (sec); 7545} 7546 7547/* Fill in the address for a pointer generated in a linker section. */ 7548 7549static bfd_vma 7550elf_finish_pointer_linker_section (bfd *input_bfd, 7551 elf_linker_section_t *lsect, 7552 struct elf_link_hash_entry *h, 7553 bfd_vma relocation, 7554 const Elf_Internal_Rela *rel) 7555{ 7556 elf_linker_section_pointers_t *linker_section_ptr; 7557 7558 BFD_ASSERT (lsect != NULL); 7559 7560 if (h != NULL) 7561 { 7562 /* Handle global symbol. */ 7563 struct ppc_elf_link_hash_entry *eh; 7564 7565 eh = (struct ppc_elf_link_hash_entry *) h; 7566 BFD_ASSERT (eh->elf.def_regular); 7567 linker_section_ptr = eh->linker_section_pointer; 7568 } 7569 else 7570 { 7571 /* Handle local symbol. */ 7572 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 7573 7574 BFD_ASSERT (is_ppc_elf (input_bfd)); 7575 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); 7576 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx]; 7577 } 7578 7579 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr, 7580 rel->r_addend, 7581 lsect); 7582 BFD_ASSERT (linker_section_ptr != NULL); 7583 7584 /* Offset will always be a multiple of four, so use the bottom bit 7585 as a "written" flag. */ 7586 if ((linker_section_ptr->offset & 1) == 0) 7587 { 7588 bfd_put_32 (lsect->section->owner, 7589 relocation + linker_section_ptr->addend, 7590 lsect->section->contents + linker_section_ptr->offset); 7591 linker_section_ptr->offset += 1; 7592 } 7593 7594 relocation = (lsect->section->output_section->vma 7595 + lsect->section->output_offset 7596 + linker_section_ptr->offset - 1 7597 - SYM_VAL (lsect->sym)); 7598 7599#ifdef DEBUG 7600 fprintf (stderr, 7601 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", 7602 lsect->name, (long) relocation, (long) relocation); 7603#endif 7604 7605 return relocation; 7606} 7607 7608#define PPC_LO(v) ((v) & 0xffff) 7609#define PPC_HI(v) (((v) >> 16) & 0xffff) 7610#define PPC_HA(v) PPC_HI ((v) + 0x8000) 7611 7612static void 7613write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p, 7614 struct bfd_link_info *info) 7615{ 7616 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 7617 bfd *output_bfd = info->output_bfd; 7618 bfd_vma plt; 7619 7620 plt = ((ent->plt.offset & ~1) 7621 + plt_sec->output_section->vma 7622 + plt_sec->output_offset); 7623 7624 if (bfd_link_pic (info)) 7625 { 7626 bfd_vma got = 0; 7627 7628 if (ent->addend >= 32768) 7629 got = (ent->addend 7630 + ent->sec->output_section->vma 7631 + ent->sec->output_offset); 7632 else if (htab->elf.hgot != NULL) 7633 got = SYM_VAL (htab->elf.hgot); 7634 7635 plt -= got; 7636 7637 if (plt + 0x8000 < 0x10000) 7638 { 7639 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p); 7640 p += 4; 7641 bfd_put_32 (output_bfd, MTCTR_11, p); 7642 p += 4; 7643 bfd_put_32 (output_bfd, BCTR, p); 7644 p += 4; 7645 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p); 7646 p += 4; 7647 } 7648 else 7649 { 7650 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p); 7651 p += 4; 7652 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); 7653 p += 4; 7654 bfd_put_32 (output_bfd, MTCTR_11, p); 7655 p += 4; 7656 bfd_put_32 (output_bfd, BCTR, p); 7657 p += 4; 7658 } 7659 } 7660 else 7661 { 7662 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p); 7663 p += 4; 7664 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); 7665 p += 4; 7666 bfd_put_32 (output_bfd, MTCTR_11, p); 7667 p += 4; 7668 bfd_put_32 (output_bfd, BCTR, p); 7669 p += 4; 7670 } 7671} 7672 7673/* Return true if symbol is defined statically. */ 7674 7675static bfd_boolean 7676is_static_defined (struct elf_link_hash_entry *h) 7677{ 7678 return ((h->root.type == bfd_link_hash_defined 7679 || h->root.type == bfd_link_hash_defweak) 7680 && h->root.u.def.section != NULL 7681 && h->root.u.def.section->output_section != NULL); 7682} 7683 7684/* If INSN is an opcode that may be used with an @tls operand, return 7685 the transformed insn for TLS optimisation, otherwise return 0. If 7686 REG is non-zero only match an insn with RB or RA equal to REG. */ 7687 7688unsigned int 7689_bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg) 7690{ 7691 unsigned int rtra; 7692 7693 if ((insn & (0x3f << 26)) != 31 << 26) 7694 return 0; 7695 7696 if (reg == 0 || ((insn >> 11) & 0x1f) == reg) 7697 rtra = insn & ((1 << 26) - (1 << 16)); 7698 else if (((insn >> 16) & 0x1f) == reg) 7699 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); 7700 else 7701 return 0; 7702 7703 if ((insn & (0x3ff << 1)) == 266 << 1) 7704 /* add -> addi. */ 7705 insn = 14 << 26; 7706 else if ((insn & (0x1f << 1)) == 23 << 1 7707 && ((insn & (0x1f << 6)) < 14 << 6 7708 || ((insn & (0x1f << 6)) >= 16 << 6 7709 && (insn & (0x1f << 6)) < 24 << 6))) 7710 /* load and store indexed -> dform. */ 7711 insn = (32 | ((insn >> 6) & 0x1f)) << 26; 7712 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) 7713 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ 7714 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); 7715 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) 7716 /* lwax -> lwa. */ 7717 insn = (58 << 26) | 2; 7718 else 7719 return 0; 7720 insn |= rtra; 7721 return insn; 7722} 7723 7724/* If INSN is an opcode that may be used with an @tprel operand, return 7725 the transformed insn for an undefined weak symbol, ie. with the 7726 thread pointer REG operand removed. Otherwise return 0. */ 7727 7728unsigned int 7729_bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg) 7730{ 7731 if ((insn & (0x1f << 16)) == reg << 16 7732 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */ 7733 || (insn & (0x3f << 26)) == 15u << 26 /* addis */ 7734 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ 7735 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ 7736 || (insn & (0x3f << 26)) == 36u << 26 /* stw */ 7737 || (insn & (0x3f << 26)) == 38u << 26 /* stb */ 7738 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ 7739 || (insn & (0x3f << 26)) == 42u << 26 /* lha */ 7740 || (insn & (0x3f << 26)) == 44u << 26 /* sth */ 7741 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ 7742 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ 7743 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ 7744 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ 7745 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ 7746 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ 7747 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ 7748 && (insn & 3) != 1) 7749 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ 7750 && ((insn & 3) == 0 || (insn & 3) == 3)))) 7751 { 7752 insn &= ~(0x1f << 16); 7753 } 7754 else if ((insn & (0x1f << 21)) == reg << 21 7755 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */ 7756 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */ 7757 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */)) 7758 { 7759 insn &= ~(0x1f << 21); 7760 insn |= (insn & (0x1f << 16)) << 5; 7761 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */) 7762 insn -= 2 >> 26; /* convert to ori,oris */ 7763 } 7764 else 7765 insn = 0; 7766 return insn; 7767} 7768 7769static bfd_boolean 7770is_insn_ds_form (unsigned int insn) 7771{ 7772 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */ 7773 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */ 7774 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */ 7775 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */); 7776} 7777 7778static bfd_boolean 7779is_insn_dq_form (unsigned int insn) 7780{ 7781 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */ 7782 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */ 7783 && (insn & 3) == 1)); 7784} 7785 7786/* The RELOCATE_SECTION function is called by the ELF backend linker 7787 to handle the relocations for a section. 7788 7789 The relocs are always passed as Rela structures; if the section 7790 actually uses Rel structures, the r_addend field will always be 7791 zero. 7792 7793 This function is responsible for adjust the section contents as 7794 necessary, and (if using Rela relocs and generating a 7795 relocatable output file) adjusting the reloc addend as 7796 necessary. 7797 7798 This function does not have to worry about setting the reloc 7799 address or the reloc symbol index. 7800 7801 LOCAL_SYMS is a pointer to the swapped in local symbols. 7802 7803 LOCAL_SECTIONS is an array giving the section in the input file 7804 corresponding to the st_shndx field of each local symbol. 7805 7806 The global hash table entry for the global symbols can be found 7807 via elf_sym_hashes (input_bfd). 7808 7809 When generating relocatable output, this function must handle 7810 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 7811 going to be the section symbol corresponding to the output 7812 section, which means that the addend must be adjusted 7813 accordingly. */ 7814 7815static bfd_boolean 7816ppc_elf_relocate_section (bfd *output_bfd, 7817 struct bfd_link_info *info, 7818 bfd *input_bfd, 7819 asection *input_section, 7820 bfd_byte *contents, 7821 Elf_Internal_Rela *relocs, 7822 Elf_Internal_Sym *local_syms, 7823 asection **local_sections) 7824{ 7825 Elf_Internal_Shdr *symtab_hdr; 7826 struct elf_link_hash_entry **sym_hashes; 7827 struct ppc_elf_link_hash_table *htab; 7828 Elf_Internal_Rela *rel; 7829 Elf_Internal_Rela *wrel; 7830 Elf_Internal_Rela *relend; 7831 Elf_Internal_Rela outrel; 7832 asection *got2; 7833 bfd_vma *local_got_offsets; 7834 bfd_boolean ret = TRUE; 7835 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0); 7836 bfd_boolean is_vxworks_tls; 7837 unsigned int picfixup_size = 0; 7838 struct ppc_elf_relax_info *relax_info = NULL; 7839 7840#ifdef DEBUG 7841 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, " 7842 "%ld relocations%s", 7843 input_bfd, input_section, 7844 (long) input_section->reloc_count, 7845 (bfd_link_relocatable (info)) ? " (relocatable)" : ""); 7846#endif 7847 7848 got2 = bfd_get_section_by_name (input_bfd, ".got2"); 7849 7850 /* Initialize howto table if not already done. */ 7851 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 7852 ppc_elf_howto_init (); 7853 7854 htab = ppc_elf_hash_table (info); 7855 local_got_offsets = elf_local_got_offsets (input_bfd); 7856 symtab_hdr = &elf_symtab_hdr (input_bfd); 7857 sym_hashes = elf_sym_hashes (input_bfd); 7858 /* We have to handle relocations in vxworks .tls_vars sections 7859 specially, because the dynamic loader is 'weird'. */ 7860 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info) 7861 && !strcmp (input_section->output_section->name, 7862 ".tls_vars")); 7863 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET) 7864 relax_info = elf_section_data (input_section)->sec_info; 7865 rel = wrel = relocs; 7866 relend = relocs + input_section->reloc_count; 7867 for (; rel < relend; wrel++, rel++) 7868 { 7869 enum elf_ppc_reloc_type r_type; 7870 bfd_vma addend; 7871 bfd_reloc_status_type r; 7872 Elf_Internal_Sym *sym; 7873 asection *sec; 7874 struct elf_link_hash_entry *h; 7875 const char *sym_name; 7876 reloc_howto_type *howto; 7877 unsigned long r_symndx; 7878 bfd_vma relocation; 7879 bfd_vma branch_bit, from; 7880 bfd_boolean unresolved_reloc; 7881 bfd_boolean warned; 7882 unsigned int tls_type, tls_mask, tls_gd; 7883 struct plt_entry **ifunc; 7884 struct reloc_howto_struct alt_howto; 7885 7886 again: 7887 r_type = ELF32_R_TYPE (rel->r_info); 7888 sym = NULL; 7889 sec = NULL; 7890 h = NULL; 7891 unresolved_reloc = FALSE; 7892 warned = FALSE; 7893 r_symndx = ELF32_R_SYM (rel->r_info); 7894 7895 if (r_symndx < symtab_hdr->sh_info) 7896 { 7897 sym = local_syms + r_symndx; 7898 sec = local_sections[r_symndx]; 7899 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); 7900 7901 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 7902 } 7903 else 7904 { 7905 bfd_boolean ignored; 7906 7907 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 7908 r_symndx, symtab_hdr, sym_hashes, 7909 h, sec, relocation, 7910 unresolved_reloc, warned, ignored); 7911 7912 sym_name = h->root.root.string; 7913 } 7914 7915 if (sec != NULL && discarded_section (sec)) 7916 { 7917 /* For relocs against symbols from removed linkonce sections, 7918 or sections discarded by a linker script, we just want the 7919 section contents zeroed. Avoid any special processing. */ 7920 howto = NULL; 7921 if (r_type < R_PPC_max) 7922 howto = ppc_elf_howto_table[r_type]; 7923 7924 _bfd_clear_contents (howto, input_bfd, input_section, 7925 contents + rel->r_offset); 7926 wrel->r_offset = rel->r_offset; 7927 wrel->r_info = 0; 7928 wrel->r_addend = 0; 7929 7930 /* For ld -r, remove relocations in debug sections against 7931 sections defined in discarded sections. Not done for 7932 non-debug to preserve relocs in .eh_frame which the 7933 eh_frame editing code expects to be present. */ 7934 if (bfd_link_relocatable (info) 7935 && (input_section->flags & SEC_DEBUGGING)) 7936 wrel--; 7937 7938 continue; 7939 } 7940 7941 if (bfd_link_relocatable (info)) 7942 { 7943 if (got2 != NULL 7944 && r_type == R_PPC_PLTREL24 7945 && rel->r_addend != 0) 7946 { 7947 /* R_PPC_PLTREL24 is rather special. If non-zero, the 7948 addend specifies the GOT pointer offset within .got2. */ 7949 rel->r_addend += got2->output_offset; 7950 } 7951 if (r_type != R_PPC_RELAX_PLT 7952 && r_type != R_PPC_RELAX_PLTREL24 7953 && r_type != R_PPC_RELAX) 7954 goto copy_reloc; 7955 } 7956 7957 /* TLS optimizations. Replace instruction sequences and relocs 7958 based on information we collected in tls_optimize. We edit 7959 RELOCS so that --emit-relocs will output something sensible 7960 for the final instruction stream. */ 7961 tls_mask = 0; 7962 tls_gd = 0; 7963 if (h != NULL) 7964 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask; 7965 else if (local_got_offsets != NULL) 7966 { 7967 struct plt_entry **local_plt; 7968 char *lgot_masks; 7969 local_plt 7970 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info); 7971 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); 7972 tls_mask = lgot_masks[r_symndx]; 7973 } 7974 7975 /* Ensure reloc mapping code below stays sane. */ 7976 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3) 7977 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3) 7978 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3) 7979 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3) 7980 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3) 7981 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3) 7982 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3) 7983 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3)) 7984 abort (); 7985 switch (r_type) 7986 { 7987 default: 7988 break; 7989 7990 case R_PPC_GOT_TPREL16: 7991 case R_PPC_GOT_TPREL16_LO: 7992 if ((tls_mask & TLS_TLS) != 0 7993 && (tls_mask & TLS_TPREL) == 0) 7994 { 7995 bfd_vma insn; 7996 7997 insn = bfd_get_32 (input_bfd, 7998 contents + rel->r_offset - d_offset); 7999 insn &= 31 << 21; 8000 insn |= 0x3c020000; /* addis 0,2,0 */ 8001 bfd_put_32 (input_bfd, insn, 8002 contents + rel->r_offset - d_offset); 8003 r_type = R_PPC_TPREL16_HA; 8004 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 8005 } 8006 break; 8007 8008 case R_PPC_TLS: 8009 if ((tls_mask & TLS_TLS) != 0 8010 && (tls_mask & TLS_TPREL) == 0) 8011 { 8012 bfd_vma insn; 8013 8014 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 8015 insn = _bfd_elf_ppc_at_tls_transform (insn, 2); 8016 if (insn == 0) 8017 abort (); 8018 bfd_put_32 (input_bfd, insn, contents + rel->r_offset); 8019 r_type = R_PPC_TPREL16_LO; 8020 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 8021 8022 /* Was PPC_TLS which sits on insn boundary, now 8023 PPC_TPREL16_LO which is at low-order half-word. */ 8024 rel->r_offset += d_offset; 8025 } 8026 break; 8027 8028 case R_PPC_GOT_TLSGD16_HI: 8029 case R_PPC_GOT_TLSGD16_HA: 8030 tls_gd = TLS_TPRELGD; 8031 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 8032 goto tls_gdld_hi; 8033 break; 8034 8035 case R_PPC_GOT_TLSLD16_HI: 8036 case R_PPC_GOT_TLSLD16_HA: 8037 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 8038 { 8039 tls_gdld_hi: 8040 if ((tls_mask & tls_gd) != 0) 8041 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 8042 + R_PPC_GOT_TPREL16); 8043 else 8044 { 8045 rel->r_offset -= d_offset; 8046 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset); 8047 r_type = R_PPC_NONE; 8048 } 8049 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 8050 } 8051 break; 8052 8053 case R_PPC_GOT_TLSGD16: 8054 case R_PPC_GOT_TLSGD16_LO: 8055 tls_gd = TLS_TPRELGD; 8056 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 8057 goto tls_ldgd_opt; 8058 break; 8059 8060 case R_PPC_GOT_TLSLD16: 8061 case R_PPC_GOT_TLSLD16_LO: 8062 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 8063 { 8064 unsigned int insn1, insn2; 8065 bfd_vma offset; 8066 8067 tls_ldgd_opt: 8068 offset = (bfd_vma) -1; 8069 /* If not using the newer R_PPC_TLSGD/LD to mark 8070 __tls_get_addr calls, we must trust that the call 8071 stays with its arg setup insns, ie. that the next 8072 reloc is the __tls_get_addr call associated with 8073 the current reloc. Edit both insns. */ 8074 if (input_section->has_tls_get_addr_call 8075 && rel + 1 < relend 8076 && branch_reloc_hash_match (input_bfd, rel + 1, 8077 htab->tls_get_addr)) 8078 offset = rel[1].r_offset; 8079 /* We read the low GOT_TLS insn because we need to keep 8080 the destination reg. It may be something other than 8081 the usual r3, and moved to r3 before the call by 8082 intervening code. */ 8083 insn1 = bfd_get_32 (input_bfd, 8084 contents + rel->r_offset - d_offset); 8085 if ((tls_mask & tls_gd) != 0) 8086 { 8087 /* IE */ 8088 insn1 &= (0x1f << 21) | (0x1f << 16); 8089 insn1 |= 32 << 26; /* lwz */ 8090 if (offset != (bfd_vma) -1) 8091 { 8092 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 8093 insn2 = 0x7c631214; /* add 3,3,2 */ 8094 bfd_put_32 (input_bfd, insn2, contents + offset); 8095 } 8096 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 8097 + R_PPC_GOT_TPREL16); 8098 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 8099 } 8100 else 8101 { 8102 /* LE */ 8103 insn1 &= 0x1f << 21; 8104 insn1 |= 0x3c020000; /* addis r,2,0 */ 8105 if (tls_gd == 0) 8106 { 8107 /* Was an LD reloc. */ 8108 for (r_symndx = 0; 8109 r_symndx < symtab_hdr->sh_info; 8110 r_symndx++) 8111 if (local_sections[r_symndx] == sec) 8112 break; 8113 if (r_symndx >= symtab_hdr->sh_info) 8114 r_symndx = STN_UNDEF; 8115 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 8116 if (r_symndx != STN_UNDEF) 8117 rel->r_addend -= (local_syms[r_symndx].st_value 8118 + sec->output_offset 8119 + sec->output_section->vma); 8120 } 8121 r_type = R_PPC_TPREL16_HA; 8122 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 8123 if (offset != (bfd_vma) -1) 8124 { 8125 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); 8126 rel[1].r_offset = offset + d_offset; 8127 rel[1].r_addend = rel->r_addend; 8128 insn2 = 0x38630000; /* addi 3,3,0 */ 8129 bfd_put_32 (input_bfd, insn2, contents + offset); 8130 } 8131 } 8132 bfd_put_32 (input_bfd, insn1, 8133 contents + rel->r_offset - d_offset); 8134 if (tls_gd == 0) 8135 { 8136 /* We changed the symbol on an LD reloc. Start over 8137 in order to get h, sym, sec etc. right. */ 8138 goto again; 8139 } 8140 } 8141 break; 8142 8143 case R_PPC_TLSGD: 8144 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 8145 { 8146 unsigned int insn2; 8147 bfd_vma offset = rel->r_offset; 8148 8149 if ((tls_mask & TLS_TPRELGD) != 0) 8150 { 8151 /* IE */ 8152 r_type = R_PPC_NONE; 8153 insn2 = 0x7c631214; /* add 3,3,2 */ 8154 } 8155 else 8156 { 8157 /* LE */ 8158 r_type = R_PPC_TPREL16_LO; 8159 rel->r_offset += d_offset; 8160 insn2 = 0x38630000; /* addi 3,3,0 */ 8161 } 8162 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 8163 bfd_put_32 (input_bfd, insn2, contents + offset); 8164 /* Zap the reloc on the _tls_get_addr call too. */ 8165 BFD_ASSERT (offset == rel[1].r_offset); 8166 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 8167 } 8168 break; 8169 8170 case R_PPC_TLSLD: 8171 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 8172 { 8173 unsigned int insn2; 8174 8175 for (r_symndx = 0; 8176 r_symndx < symtab_hdr->sh_info; 8177 r_symndx++) 8178 if (local_sections[r_symndx] == sec) 8179 break; 8180 if (r_symndx >= symtab_hdr->sh_info) 8181 r_symndx = STN_UNDEF; 8182 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 8183 if (r_symndx != STN_UNDEF) 8184 rel->r_addend -= (local_syms[r_symndx].st_value 8185 + sec->output_offset 8186 + sec->output_section->vma); 8187 8188 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); 8189 rel->r_offset += d_offset; 8190 insn2 = 0x38630000; /* addi 3,3,0 */ 8191 bfd_put_32 (input_bfd, insn2, 8192 contents + rel->r_offset - d_offset); 8193 /* Zap the reloc on the _tls_get_addr call too. */ 8194 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset); 8195 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 8196 goto again; 8197 } 8198 break; 8199 } 8200 8201 /* Handle other relocations that tweak non-addend part of insn. */ 8202 branch_bit = 0; 8203 switch (r_type) 8204 { 8205 default: 8206 break; 8207 8208 /* Branch taken prediction relocations. */ 8209 case R_PPC_ADDR14_BRTAKEN: 8210 case R_PPC_REL14_BRTAKEN: 8211 branch_bit = BRANCH_PREDICT_BIT; 8212 /* Fall through. */ 8213 8214 /* Branch not taken prediction relocations. */ 8215 case R_PPC_ADDR14_BRNTAKEN: 8216 case R_PPC_REL14_BRNTAKEN: 8217 { 8218 bfd_vma insn; 8219 8220 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 8221 insn &= ~BRANCH_PREDICT_BIT; 8222 insn |= branch_bit; 8223 8224 from = (rel->r_offset 8225 + input_section->output_offset 8226 + input_section->output_section->vma); 8227 8228 /* Invert 'y' bit if not the default. */ 8229 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) 8230 insn ^= BRANCH_PREDICT_BIT; 8231 8232 bfd_put_32 (input_bfd, insn, contents + rel->r_offset); 8233 break; 8234 } 8235 } 8236 8237 if (ELIMINATE_COPY_RELOCS 8238 && h != NULL 8239 && !h->def_regular 8240 && h->protected_def 8241 && ppc_elf_hash_entry (h)->has_addr16_ha 8242 && ppc_elf_hash_entry (h)->has_addr16_lo 8243 && htab->params->pic_fixup > 0) 8244 { 8245 /* Convert lis;addi or lis;load/store accessing a protected 8246 variable defined in a shared library to PIC. */ 8247 unsigned int insn; 8248 8249 if (r_type == R_PPC_ADDR16_HA) 8250 { 8251 insn = bfd_get_32 (input_bfd, 8252 contents + rel->r_offset - d_offset); 8253 if ((insn & (0x3f << 26)) == (15u << 26) 8254 && (insn & (0x1f << 16)) == 0 /* lis */) 8255 { 8256 bfd_byte *p; 8257 bfd_vma off; 8258 bfd_vma got_addr; 8259 8260 p = (contents + input_section->size 8261 - relax_info->workaround_size 8262 - relax_info->picfixup_size 8263 + picfixup_size); 8264 off = (p - contents) - (rel->r_offset - d_offset); 8265 if (off > 0x1fffffc || (off & 3) != 0) 8266 info->callbacks->einfo 8267 (_("%P: %H: fixup branch overflow\n"), 8268 input_bfd, input_section, rel->r_offset); 8269 8270 bfd_put_32 (input_bfd, B | off, 8271 contents + rel->r_offset - d_offset); 8272 got_addr = (htab->elf.sgot->output_section->vma 8273 + htab->elf.sgot->output_offset 8274 + (h->got.offset & ~1)); 8275 wrel->r_offset = (p - contents) + d_offset; 8276 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA); 8277 wrel->r_addend = got_addr; 8278 insn &= ~0xffff; 8279 insn |= ((unsigned int )(got_addr + 0x8000) >> 16) & 0xffff; 8280 bfd_put_32 (input_bfd, insn, p); 8281 8282 /* Convert lis to lwz, loading address from GOT. */ 8283 insn &= ~0xffff; 8284 insn ^= (32u ^ 15u) << 26; 8285 insn |= (insn & (0x1f << 21)) >> 5; 8286 insn |= got_addr & 0xffff; 8287 bfd_put_32 (input_bfd, insn, p + 4); 8288 8289 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8); 8290 picfixup_size += 12; 8291 8292 /* Use one of the spare relocs, so --emit-relocs 8293 output is reasonable. */ 8294 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel)); 8295 wrel++, rel++; 8296 rel->r_offset = wrel[-1].r_offset + 4; 8297 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO); 8298 rel->r_addend = wrel[-1].r_addend; 8299 8300 /* Continue on as if we had a got reloc, to output 8301 dynamic reloc. */ 8302 r_type = R_PPC_GOT16_LO; 8303 } 8304 else 8305 info->callbacks->einfo 8306 /* xgettext:c-format */ 8307 (_("%P: %H: error: %s with unexpected instruction %x\n"), 8308 input_bfd, input_section, rel->r_offset, 8309 "R_PPC_ADDR16_HA", insn); 8310 } 8311 else if (r_type == R_PPC_ADDR16_LO) 8312 { 8313 insn = bfd_get_32 (input_bfd, 8314 contents + rel->r_offset - d_offset); 8315 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */ 8316 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ 8317 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ 8318 || (insn & (0x3f << 26)) == 36u << 26 /* stw */ 8319 || (insn & (0x3f << 26)) == 38u << 26 /* stb */ 8320 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ 8321 || (insn & (0x3f << 26)) == 42u << 26 /* lha */ 8322 || (insn & (0x3f << 26)) == 44u << 26 /* sth */ 8323 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ 8324 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ 8325 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ 8326 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ 8327 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ 8328 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ 8329 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ 8330 && (insn & 3) != 1) 8331 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ 8332 && ((insn & 3) == 0 || (insn & 3) == 3))) 8333 { 8334 /* Arrange to apply the reloc addend, if any. */ 8335 relocation = 0; 8336 unresolved_reloc = FALSE; 8337 rel->r_info = ELF32_R_INFO (0, r_type); 8338 } 8339 else 8340 info->callbacks->einfo 8341 /* xgettext:c-format */ 8342 (_("%P: %H: error: %s with unexpected instruction %x\n"), 8343 input_bfd, input_section, rel->r_offset, 8344 "R_PPC_ADDR16_LO", insn); 8345 } 8346 } 8347 8348 ifunc = NULL; 8349 if (!htab->is_vxworks) 8350 { 8351 struct plt_entry *ent; 8352 8353 if (h != NULL) 8354 { 8355 if (h->type == STT_GNU_IFUNC) 8356 ifunc = &h->plt.plist; 8357 } 8358 else if (local_got_offsets != NULL 8359 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 8360 { 8361 struct plt_entry **local_plt; 8362 8363 local_plt = (struct plt_entry **) (local_got_offsets 8364 + symtab_hdr->sh_info); 8365 ifunc = local_plt + r_symndx; 8366 } 8367 8368 ent = NULL; 8369 if (ifunc != NULL 8370 && (!bfd_link_pic (info) 8371 || is_branch_reloc (r_type))) 8372 { 8373 addend = 0; 8374 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info)) 8375 addend = rel->r_addend; 8376 ent = find_plt_ent (ifunc, got2, addend); 8377 } 8378 if (ent != NULL) 8379 { 8380 if (bfd_link_pic (info) 8381 && ent->sec != got2 8382 && htab->plt_type != PLT_NEW 8383 && (!htab->elf.dynamic_sections_created 8384 || h == NULL 8385 || h->dynindx == -1)) 8386 { 8387 /* Uh oh, we are going to create a pic glink stub 8388 for an ifunc (here for h == NULL and later in 8389 finish_dynamic_symbol for h != NULL), and 8390 apparently are using code compiled with 8391 -mbss-plt. The difficulty is that -mbss-plt code 8392 gives no indication via a magic PLTREL24 addend 8393 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or 8394 is pointing into a .got2 section (and how far 8395 into .got2). */ 8396 info->callbacks->einfo 8397 /* xgettext:c-format */ 8398 (_("%X%P: %H: unsupported bss-plt -fPIC ifunc %s\n"), 8399 input_bfd, input_section, rel->r_offset, sym_name); 8400 } 8401 if (h == NULL && (ent->plt.offset & 1) == 0) 8402 { 8403 Elf_Internal_Rela rela; 8404 bfd_byte *loc; 8405 8406 rela.r_offset = (htab->elf.iplt->output_section->vma 8407 + htab->elf.iplt->output_offset 8408 + ent->plt.offset); 8409 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 8410 rela.r_addend = relocation; 8411 loc = htab->elf.irelplt->contents; 8412 loc += (htab->elf.irelplt->reloc_count++ 8413 * sizeof (Elf32_External_Rela)); 8414 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 8415 8416 ent->plt.offset |= 1; 8417 } 8418 if (h == NULL && (ent->glink_offset & 1) == 0) 8419 { 8420 unsigned char *p = ((unsigned char *) htab->glink->contents 8421 + ent->glink_offset); 8422 write_glink_stub (ent, htab->elf.iplt, p, info); 8423 ent->glink_offset |= 1; 8424 } 8425 8426 unresolved_reloc = FALSE; 8427 if (htab->plt_type == PLT_NEW 8428 || !htab->elf.dynamic_sections_created 8429 || h == NULL 8430 || h->dynindx == -1) 8431 relocation = (htab->glink->output_section->vma 8432 + htab->glink->output_offset 8433 + (ent->glink_offset & ~1)); 8434 else 8435 relocation = (htab->elf.splt->output_section->vma 8436 + htab->elf.splt->output_offset 8437 + ent->plt.offset); 8438 } 8439 } 8440 8441 addend = rel->r_addend; 8442 tls_type = 0; 8443 howto = NULL; 8444 if (r_type < R_PPC_max) 8445 howto = ppc_elf_howto_table[r_type]; 8446 switch (r_type) 8447 { 8448 default: 8449 info->callbacks->einfo 8450 /* xgettext:c-format */ 8451 (_("%P: %B: unknown relocation type %d for symbol %s\n"), 8452 input_bfd, (int) r_type, sym_name); 8453 8454 bfd_set_error (bfd_error_bad_value); 8455 ret = FALSE; 8456 goto copy_reloc; 8457 8458 case R_PPC_NONE: 8459 case R_PPC_TLS: 8460 case R_PPC_TLSGD: 8461 case R_PPC_TLSLD: 8462 case R_PPC_EMB_MRKREF: 8463 case R_PPC_GNU_VTINHERIT: 8464 case R_PPC_GNU_VTENTRY: 8465 goto copy_reloc; 8466 8467 /* GOT16 relocations. Like an ADDR16 using the symbol's 8468 address in the GOT as relocation value instead of the 8469 symbol's value itself. Also, create a GOT entry for the 8470 symbol and put the symbol value there. */ 8471 case R_PPC_GOT_TLSGD16: 8472 case R_PPC_GOT_TLSGD16_LO: 8473 case R_PPC_GOT_TLSGD16_HI: 8474 case R_PPC_GOT_TLSGD16_HA: 8475 tls_type = TLS_TLS | TLS_GD; 8476 goto dogot; 8477 8478 case R_PPC_GOT_TLSLD16: 8479 case R_PPC_GOT_TLSLD16_LO: 8480 case R_PPC_GOT_TLSLD16_HI: 8481 case R_PPC_GOT_TLSLD16_HA: 8482 tls_type = TLS_TLS | TLS_LD; 8483 goto dogot; 8484 8485 case R_PPC_GOT_TPREL16: 8486 case R_PPC_GOT_TPREL16_LO: 8487 case R_PPC_GOT_TPREL16_HI: 8488 case R_PPC_GOT_TPREL16_HA: 8489 tls_type = TLS_TLS | TLS_TPREL; 8490 goto dogot; 8491 8492 case R_PPC_GOT_DTPREL16: 8493 case R_PPC_GOT_DTPREL16_LO: 8494 case R_PPC_GOT_DTPREL16_HI: 8495 case R_PPC_GOT_DTPREL16_HA: 8496 tls_type = TLS_TLS | TLS_DTPREL; 8497 goto dogot; 8498 8499 case R_PPC_GOT16: 8500 case R_PPC_GOT16_LO: 8501 case R_PPC_GOT16_HI: 8502 case R_PPC_GOT16_HA: 8503 tls_mask = 0; 8504 dogot: 8505 { 8506 /* Relocation is to the entry for this symbol in the global 8507 offset table. */ 8508 bfd_vma off; 8509 bfd_vma *offp; 8510 unsigned long indx; 8511 8512 if (htab->elf.sgot == NULL) 8513 abort (); 8514 8515 indx = 0; 8516 if (tls_type == (TLS_TLS | TLS_LD) 8517 && (h == NULL 8518 || !h->def_dynamic)) 8519 offp = &htab->tlsld_got.offset; 8520 else if (h != NULL) 8521 { 8522 bfd_boolean dyn; 8523 dyn = htab->elf.dynamic_sections_created; 8524 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) 8525 || (bfd_link_pic (info) 8526 && SYMBOL_REFERENCES_LOCAL (info, h))) 8527 /* This is actually a static link, or it is a 8528 -Bsymbolic link and the symbol is defined 8529 locally, or the symbol was forced to be local 8530 because of a version file. */ 8531 ; 8532 else 8533 { 8534 BFD_ASSERT (h->dynindx != -1); 8535 indx = h->dynindx; 8536 unresolved_reloc = FALSE; 8537 } 8538 offp = &h->got.offset; 8539 } 8540 else 8541 { 8542 if (local_got_offsets == NULL) 8543 abort (); 8544 offp = &local_got_offsets[r_symndx]; 8545 } 8546 8547 /* The offset must always be a multiple of 4. We use the 8548 least significant bit to record whether we have already 8549 processed this entry. */ 8550 off = *offp; 8551 if ((off & 1) != 0) 8552 off &= ~1; 8553 else 8554 { 8555 unsigned int tls_m = (tls_mask 8556 & (TLS_LD | TLS_GD | TLS_DTPREL 8557 | TLS_TPREL | TLS_TPRELGD)); 8558 8559 if (offp == &htab->tlsld_got.offset) 8560 tls_m = TLS_LD; 8561 else if (h == NULL 8562 || !h->def_dynamic) 8563 tls_m &= ~TLS_LD; 8564 8565 /* We might have multiple got entries for this sym. 8566 Initialize them all. */ 8567 do 8568 { 8569 int tls_ty = 0; 8570 8571 if ((tls_m & TLS_LD) != 0) 8572 { 8573 tls_ty = TLS_TLS | TLS_LD; 8574 tls_m &= ~TLS_LD; 8575 } 8576 else if ((tls_m & TLS_GD) != 0) 8577 { 8578 tls_ty = TLS_TLS | TLS_GD; 8579 tls_m &= ~TLS_GD; 8580 } 8581 else if ((tls_m & TLS_DTPREL) != 0) 8582 { 8583 tls_ty = TLS_TLS | TLS_DTPREL; 8584 tls_m &= ~TLS_DTPREL; 8585 } 8586 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0) 8587 { 8588 tls_ty = TLS_TLS | TLS_TPREL; 8589 tls_m = 0; 8590 } 8591 8592 /* Generate relocs for the dynamic linker. */ 8593 if ((bfd_link_pic (info) || indx != 0) 8594 && (offp == &htab->tlsld_got.offset 8595 || h == NULL 8596 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 8597 || h->root.type != bfd_link_hash_undefweak)) 8598 { 8599 asection *rsec = htab->elf.srelgot; 8600 bfd_byte * loc; 8601 8602 if (ifunc != NULL) 8603 rsec = htab->elf.irelplt; 8604 outrel.r_offset = (htab->elf.sgot->output_section->vma 8605 + htab->elf.sgot->output_offset 8606 + off); 8607 outrel.r_addend = 0; 8608 if (tls_ty & (TLS_LD | TLS_GD)) 8609 { 8610 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32); 8611 if (tls_ty == (TLS_TLS | TLS_GD)) 8612 { 8613 loc = rsec->contents; 8614 loc += (rsec->reloc_count++ 8615 * sizeof (Elf32_External_Rela)); 8616 bfd_elf32_swap_reloca_out (output_bfd, 8617 &outrel, loc); 8618 outrel.r_offset += 4; 8619 outrel.r_info 8620 = ELF32_R_INFO (indx, R_PPC_DTPREL32); 8621 } 8622 } 8623 else if (tls_ty == (TLS_TLS | TLS_DTPREL)) 8624 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32); 8625 else if (tls_ty == (TLS_TLS | TLS_TPREL)) 8626 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32); 8627 else if (indx != 0) 8628 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT); 8629 else if (ifunc != NULL) 8630 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 8631 else 8632 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); 8633 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD)) 8634 { 8635 outrel.r_addend += relocation; 8636 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL)) 8637 { 8638 if (htab->elf.tls_sec == NULL) 8639 outrel.r_addend = 0; 8640 else 8641 outrel.r_addend -= htab->elf.tls_sec->vma; 8642 } 8643 } 8644 loc = rsec->contents; 8645 loc += (rsec->reloc_count++ 8646 * sizeof (Elf32_External_Rela)); 8647 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 8648 } 8649 8650 /* Init the .got section contents if we're not 8651 emitting a reloc. */ 8652 else 8653 { 8654 bfd_vma value = relocation; 8655 8656 if (tls_ty == (TLS_TLS | TLS_LD)) 8657 value = 1; 8658 else if (tls_ty != 0) 8659 { 8660 if (htab->elf.tls_sec == NULL) 8661 value = 0; 8662 else 8663 { 8664 value -= htab->elf.tls_sec->vma + DTP_OFFSET; 8665 if (tls_ty == (TLS_TLS | TLS_TPREL)) 8666 value += DTP_OFFSET - TP_OFFSET; 8667 } 8668 8669 if (tls_ty == (TLS_TLS | TLS_GD)) 8670 { 8671 bfd_put_32 (input_bfd, value, 8672 htab->elf.sgot->contents + off + 4); 8673 value = 1; 8674 } 8675 } 8676 bfd_put_32 (input_bfd, value, 8677 htab->elf.sgot->contents + off); 8678 } 8679 8680 off += 4; 8681 if (tls_ty & (TLS_LD | TLS_GD)) 8682 off += 4; 8683 } 8684 while (tls_m != 0); 8685 8686 off = *offp; 8687 *offp = off | 1; 8688 } 8689 8690 if (off >= (bfd_vma) -2) 8691 abort (); 8692 8693 if ((tls_type & TLS_TLS) != 0) 8694 { 8695 if (tls_type != (TLS_TLS | TLS_LD)) 8696 { 8697 if ((tls_mask & TLS_LD) != 0 8698 && !(h == NULL 8699 || !h->def_dynamic)) 8700 off += 8; 8701 if (tls_type != (TLS_TLS | TLS_GD)) 8702 { 8703 if ((tls_mask & TLS_GD) != 0) 8704 off += 8; 8705 if (tls_type != (TLS_TLS | TLS_DTPREL)) 8706 { 8707 if ((tls_mask & TLS_DTPREL) != 0) 8708 off += 4; 8709 } 8710 } 8711 } 8712 } 8713 8714 /* If here for a picfixup, we're done. */ 8715 if (r_type != ELF32_R_TYPE (rel->r_info)) 8716 goto copy_reloc; 8717 8718 relocation = (htab->elf.sgot->output_section->vma 8719 + htab->elf.sgot->output_offset 8720 + off 8721 - SYM_VAL (htab->elf.hgot)); 8722 8723 /* Addends on got relocations don't make much sense. 8724 x+off@got is actually x@got+off, and since the got is 8725 generated by a hash table traversal, the value in the 8726 got at entry m+n bears little relation to the entry m. */ 8727 if (addend != 0) 8728 info->callbacks->einfo 8729 /* xgettext:c-format */ 8730 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"), 8731 input_bfd, input_section, rel->r_offset, 8732 howto->name, 8733 sym_name); 8734 } 8735 break; 8736 8737 /* Relocations that need no special processing. */ 8738 case R_PPC_LOCAL24PC: 8739 /* It makes no sense to point a local relocation 8740 at a symbol not in this object. */ 8741 if (unresolved_reloc) 8742 { 8743 (*info->callbacks->undefined_symbol) (info, 8744 h->root.root.string, 8745 input_bfd, 8746 input_section, 8747 rel->r_offset, 8748 TRUE); 8749 goto copy_reloc; 8750 } 8751 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info)) 8752 { 8753 /* @local on an ifunc does not really make sense since 8754 the ifunc resolver can take you anywhere. More 8755 seriously, calls to ifuncs must go through a plt call 8756 stub, and for pic the plt call stubs uses r30 to 8757 access the PLT. The problem is that a call that is 8758 local won't have the +32k reloc addend trick marking 8759 -fPIC code, so the linker won't know whether r30 is 8760 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */ 8761 /* xgettext:c-format */ 8762 info->callbacks->einfo (_("%X%P: %H: @local call to ifunc %s\n"), 8763 input_bfd, input_section, rel->r_offset, 8764 h->root.root.string); 8765 } 8766 break; 8767 8768 case R_PPC_DTPREL16: 8769 case R_PPC_DTPREL16_LO: 8770 case R_PPC_DTPREL16_HI: 8771 case R_PPC_DTPREL16_HA: 8772 if (htab->elf.tls_sec != NULL) 8773 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 8774 break; 8775 8776 /* Relocations that may need to be propagated if this is a shared 8777 object. */ 8778 case R_PPC_TPREL16: 8779 case R_PPC_TPREL16_LO: 8780 case R_PPC_TPREL16_HI: 8781 case R_PPC_TPREL16_HA: 8782 if (h != NULL 8783 && h->root.type == bfd_link_hash_undefweak 8784 && h->dynindx == -1) 8785 { 8786 /* Make this relocation against an undefined weak symbol 8787 resolve to zero. This is really just a tweak, since 8788 code using weak externs ought to check that they are 8789 defined before using them. */ 8790 bfd_byte *p = contents + rel->r_offset - d_offset; 8791 unsigned int insn = bfd_get_32 (input_bfd, p); 8792 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2); 8793 if (insn != 0) 8794 bfd_put_32 (input_bfd, insn, p); 8795 break; 8796 } 8797 if (htab->elf.tls_sec != NULL) 8798 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 8799 /* The TPREL16 relocs shouldn't really be used in shared 8800 libs as they will result in DT_TEXTREL being set, but 8801 support them anyway. */ 8802 goto dodyn; 8803 8804 case R_PPC_TPREL32: 8805 if (htab->elf.tls_sec != NULL) 8806 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 8807 goto dodyn; 8808 8809 case R_PPC_DTPREL32: 8810 if (htab->elf.tls_sec != NULL) 8811 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 8812 goto dodyn; 8813 8814 case R_PPC_DTPMOD32: 8815 relocation = 1; 8816 addend = 0; 8817 goto dodyn; 8818 8819 case R_PPC_REL16: 8820 case R_PPC_REL16_LO: 8821 case R_PPC_REL16_HI: 8822 case R_PPC_REL16_HA: 8823 case R_PPC_REL16DX_HA: 8824 break; 8825 8826 case R_PPC_REL32: 8827 if (h == NULL || h == htab->elf.hgot) 8828 break; 8829 /* fall through */ 8830 8831 case R_PPC_ADDR32: 8832 case R_PPC_ADDR16: 8833 case R_PPC_ADDR16_LO: 8834 case R_PPC_ADDR16_HI: 8835 case R_PPC_ADDR16_HA: 8836 case R_PPC_UADDR32: 8837 case R_PPC_UADDR16: 8838 goto dodyn; 8839 8840 case R_PPC_VLE_REL8: 8841 case R_PPC_VLE_REL15: 8842 case R_PPC_VLE_REL24: 8843 case R_PPC_REL24: 8844 case R_PPC_REL14: 8845 case R_PPC_REL14_BRTAKEN: 8846 case R_PPC_REL14_BRNTAKEN: 8847 /* If these relocations are not to a named symbol, they can be 8848 handled right here, no need to bother the dynamic linker. */ 8849 if (SYMBOL_CALLS_LOCAL (info, h) 8850 || h == htab->elf.hgot) 8851 break; 8852 /* fall through */ 8853 8854 case R_PPC_ADDR24: 8855 case R_PPC_ADDR14: 8856 case R_PPC_ADDR14_BRTAKEN: 8857 case R_PPC_ADDR14_BRNTAKEN: 8858 if (h != NULL && !bfd_link_pic (info)) 8859 break; 8860 /* fall through */ 8861 8862 dodyn: 8863 if ((input_section->flags & SEC_ALLOC) == 0 8864 || is_vxworks_tls) 8865 break; 8866 8867 if ((bfd_link_pic (info) 8868 && !(h != NULL 8869 && ((h->root.type == bfd_link_hash_undefined 8870 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN 8871 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) 8872 || (h->root.type == bfd_link_hash_undefweak 8873 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))) 8874 && (must_be_dyn_reloc (info, r_type) 8875 || !SYMBOL_CALLS_LOCAL (info, h))) 8876 || (ELIMINATE_COPY_RELOCS 8877 && !bfd_link_pic (info) 8878 && h != NULL 8879 && h->dynindx != -1 8880 && !h->non_got_ref 8881 && !h->def_regular 8882 && !(h->protected_def 8883 && ppc_elf_hash_entry (h)->has_addr16_ha 8884 && ppc_elf_hash_entry (h)->has_addr16_lo 8885 && htab->params->pic_fixup > 0))) 8886 { 8887 int skip; 8888 bfd_byte *loc; 8889 asection *sreloc; 8890#ifdef DEBUG 8891 fprintf (stderr, "ppc_elf_relocate_section needs to " 8892 "create relocation for %s\n", 8893 (h && h->root.root.string 8894 ? h->root.root.string : "<unknown>")); 8895#endif 8896 8897 /* When generating a shared object, these relocations 8898 are copied into the output file to be resolved at run 8899 time. */ 8900 sreloc = elf_section_data (input_section)->sreloc; 8901 if (ifunc) 8902 sreloc = htab->elf.irelplt; 8903 if (sreloc == NULL) 8904 return FALSE; 8905 8906 skip = 0; 8907 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info, 8908 input_section, 8909 rel->r_offset); 8910 if (outrel.r_offset == (bfd_vma) -1 8911 || outrel.r_offset == (bfd_vma) -2) 8912 skip = (int) outrel.r_offset; 8913 outrel.r_offset += (input_section->output_section->vma 8914 + input_section->output_offset); 8915 8916 if (skip) 8917 memset (&outrel, 0, sizeof outrel); 8918 else if ((h != NULL 8919 && (h->root.type == bfd_link_hash_undefined 8920 || h->root.type == bfd_link_hash_undefweak)) 8921 || !SYMBOL_REFERENCES_LOCAL (info, h)) 8922 { 8923 BFD_ASSERT (h->dynindx != -1); 8924 unresolved_reloc = FALSE; 8925 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 8926 outrel.r_addend = rel->r_addend; 8927 } 8928 else 8929 { 8930 outrel.r_addend = relocation + rel->r_addend; 8931 8932 if (r_type != R_PPC_ADDR32) 8933 { 8934 long indx = 0; 8935 8936 if (ifunc != NULL) 8937 { 8938 /* If we get here when building a static 8939 executable, then the libc startup function 8940 responsible for applying indirect function 8941 relocations is going to complain about 8942 the reloc type. 8943 If we get here when building a dynamic 8944 executable, it will be because we have 8945 a text relocation. The dynamic loader 8946 will set the text segment writable and 8947 non-executable to apply text relocations. 8948 So we'll segfault when trying to run the 8949 indirection function to resolve the reloc. */ 8950 info->callbacks->einfo 8951 /* xgettext:c-format */ 8952 (_("%P: %H: relocation %s for indirect " 8953 "function %s unsupported\n"), 8954 input_bfd, input_section, rel->r_offset, 8955 howto->name, 8956 sym_name); 8957 ret = FALSE; 8958 } 8959 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec)) 8960 ; 8961 else if (sec == NULL || sec->owner == NULL) 8962 { 8963 bfd_set_error (bfd_error_bad_value); 8964 ret = FALSE; 8965 } 8966 else 8967 { 8968 asection *osec; 8969 8970 /* We are turning this relocation into one 8971 against a section symbol. It would be 8972 proper to subtract the symbol's value, 8973 osec->vma, from the emitted reloc addend, 8974 but ld.so expects buggy relocs. 8975 FIXME: Why not always use a zero index? */ 8976 osec = sec->output_section; 8977 indx = elf_section_data (osec)->dynindx; 8978 if (indx == 0) 8979 { 8980 osec = htab->elf.text_index_section; 8981 indx = elf_section_data (osec)->dynindx; 8982 } 8983 BFD_ASSERT (indx != 0); 8984#ifdef DEBUG 8985 if (indx == 0) 8986 printf ("indx=%ld section=%s flags=%08x name=%s\n", 8987 indx, osec->name, osec->flags, 8988 h->root.root.string); 8989#endif 8990 } 8991 8992 outrel.r_info = ELF32_R_INFO (indx, r_type); 8993 } 8994 else if (ifunc != NULL) 8995 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 8996 else 8997 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); 8998 } 8999 9000 loc = sreloc->contents; 9001 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 9002 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 9003 9004 if (skip == -1) 9005 goto copy_reloc; 9006 9007 /* This reloc will be computed at runtime. We clear the memory 9008 so that it contains predictable value. */ 9009 if (! skip 9010 && ((input_section->flags & SEC_ALLOC) != 0 9011 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE)) 9012 { 9013 relocation = howto->pc_relative ? outrel.r_offset : 0; 9014 addend = 0; 9015 break; 9016 } 9017 } 9018 break; 9019 9020 case R_PPC_RELAX_PLT: 9021 case R_PPC_RELAX_PLTREL24: 9022 if (h != NULL) 9023 { 9024 struct plt_entry *ent; 9025 bfd_vma got2_addend = 0; 9026 9027 if (r_type == R_PPC_RELAX_PLTREL24) 9028 { 9029 if (bfd_link_pic (info)) 9030 got2_addend = addend; 9031 addend = 0; 9032 } 9033 ent = find_plt_ent (&h->plt.plist, got2, got2_addend); 9034 if (htab->plt_type == PLT_NEW) 9035 relocation = (htab->glink->output_section->vma 9036 + htab->glink->output_offset 9037 + ent->glink_offset); 9038 else 9039 relocation = (htab->elf.splt->output_section->vma 9040 + htab->elf.splt->output_offset 9041 + ent->plt.offset); 9042 } 9043 /* Fall through. */ 9044 9045 case R_PPC_RELAX: 9046 { 9047 const int *stub; 9048 size_t size; 9049 size_t insn_offset = rel->r_offset; 9050 unsigned int insn; 9051 9052 if (bfd_link_pic (info)) 9053 { 9054 relocation -= (input_section->output_section->vma 9055 + input_section->output_offset 9056 + rel->r_offset - 4); 9057 stub = shared_stub_entry; 9058 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12); 9059 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8); 9060 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4); 9061 stub += 3; 9062 size = ARRAY_SIZE (shared_stub_entry) - 3; 9063 } 9064 else 9065 { 9066 stub = stub_entry; 9067 size = ARRAY_SIZE (stub_entry); 9068 } 9069 9070 relocation += addend; 9071 if (bfd_link_relocatable (info)) 9072 relocation = 0; 9073 9074 /* First insn is HA, second is LO. */ 9075 insn = *stub++; 9076 insn |= ((relocation + 0x8000) >> 16) & 0xffff; 9077 bfd_put_32 (input_bfd, insn, contents + insn_offset); 9078 insn_offset += 4; 9079 9080 insn = *stub++; 9081 insn |= relocation & 0xffff; 9082 bfd_put_32 (input_bfd, insn, contents + insn_offset); 9083 insn_offset += 4; 9084 size -= 2; 9085 9086 while (size != 0) 9087 { 9088 insn = *stub++; 9089 --size; 9090 bfd_put_32 (input_bfd, insn, contents + insn_offset); 9091 insn_offset += 4; 9092 } 9093 9094 /* Rewrite the reloc and convert one of the trailing nop 9095 relocs to describe this relocation. */ 9096 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE); 9097 /* The relocs are at the bottom 2 bytes */ 9098 wrel->r_offset = rel->r_offset + d_offset; 9099 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA); 9100 wrel->r_addend = rel->r_addend; 9101 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel)); 9102 wrel++, rel++; 9103 wrel->r_offset += 4; 9104 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO); 9105 } 9106 continue; 9107 9108 /* Indirect .sdata relocation. */ 9109 case R_PPC_EMB_SDAI16: 9110 BFD_ASSERT (htab->sdata[0].section != NULL); 9111 if (!is_static_defined (htab->sdata[0].sym)) 9112 { 9113 unresolved_reloc = TRUE; 9114 break; 9115 } 9116 relocation 9117 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0], 9118 h, relocation, rel); 9119 addend = 0; 9120 break; 9121 9122 /* Indirect .sdata2 relocation. */ 9123 case R_PPC_EMB_SDA2I16: 9124 BFD_ASSERT (htab->sdata[1].section != NULL); 9125 if (!is_static_defined (htab->sdata[1].sym)) 9126 { 9127 unresolved_reloc = TRUE; 9128 break; 9129 } 9130 relocation 9131 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1], 9132 h, relocation, rel); 9133 addend = 0; 9134 break; 9135 9136 /* Handle the TOC16 reloc. We want to use the offset within the .got 9137 section, not the actual VMA. This is appropriate when generating 9138 an embedded ELF object, for which the .got section acts like the 9139 AIX .toc section. */ 9140 case R_PPC_TOC16: /* phony GOT16 relocations */ 9141 if (sec == NULL || sec->output_section == NULL) 9142 { 9143 unresolved_reloc = TRUE; 9144 break; 9145 } 9146 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec), 9147 ".got") == 0 9148 || strcmp (bfd_get_section_name (sec->owner, sec), 9149 ".cgot") == 0); 9150 9151 addend -= sec->output_section->vma + sec->output_offset + 0x8000; 9152 break; 9153 9154 case R_PPC_PLTREL24: 9155 if (h != NULL && ifunc == NULL) 9156 { 9157 struct plt_entry *ent; 9158 9159 ent = find_plt_ent (&h->plt.plist, got2, 9160 bfd_link_pic (info) ? addend : 0); 9161 if (ent == NULL 9162 || htab->elf.splt == NULL) 9163 { 9164 /* We didn't make a PLT entry for this symbol. This 9165 happens when statically linking PIC code, or when 9166 using -Bsymbolic. */ 9167 } 9168 else 9169 { 9170 /* Relocation is to the entry for this symbol in the 9171 procedure linkage table. */ 9172 unresolved_reloc = FALSE; 9173 if (htab->plt_type == PLT_NEW) 9174 relocation = (htab->glink->output_section->vma 9175 + htab->glink->output_offset 9176 + ent->glink_offset); 9177 else 9178 relocation = (htab->elf.splt->output_section->vma 9179 + htab->elf.splt->output_offset 9180 + ent->plt.offset); 9181 } 9182 } 9183 9184 /* R_PPC_PLTREL24 is rather special. If non-zero, the 9185 addend specifies the GOT pointer offset within .got2. 9186 Don't apply it to the relocation field. */ 9187 addend = 0; 9188 break; 9189 9190 /* Relocate against _SDA_BASE_. */ 9191 case R_PPC_SDAREL16: 9192 { 9193 const char *name; 9194 struct elf_link_hash_entry *sda = htab->sdata[0].sym; 9195 9196 if (sec == NULL 9197 || sec->output_section == NULL 9198 || !is_static_defined (sda)) 9199 { 9200 unresolved_reloc = TRUE; 9201 break; 9202 } 9203 addend -= SYM_VAL (sda); 9204 9205 name = bfd_get_section_name (output_bfd, sec->output_section); 9206 if (!(strcmp (name, ".sdata") == 0 9207 || strcmp (name, ".sbss") == 0)) 9208 { 9209 info->callbacks->einfo 9210 /* xgettext:c-format */ 9211 (_("%P: %B: the target (%s) of a %s relocation is " 9212 "in the wrong output section (%s)\n"), 9213 input_bfd, 9214 sym_name, 9215 howto->name, 9216 name); 9217 } 9218 } 9219 break; 9220 9221 /* Relocate against _SDA2_BASE_. */ 9222 case R_PPC_EMB_SDA2REL: 9223 { 9224 const char *name; 9225 struct elf_link_hash_entry *sda = htab->sdata[1].sym; 9226 9227 if (sec == NULL 9228 || sec->output_section == NULL 9229 || !is_static_defined (sda)) 9230 { 9231 unresolved_reloc = TRUE; 9232 break; 9233 } 9234 addend -= SYM_VAL (sda); 9235 9236 name = bfd_get_section_name (output_bfd, sec->output_section); 9237 if (!(strcmp (name, ".sdata2") == 0 9238 || strcmp (name, ".sbss2") == 0)) 9239 { 9240 info->callbacks->einfo 9241 /* xgettext:c-format */ 9242 (_("%P: %B: the target (%s) of a %s relocation is " 9243 "in the wrong output section (%s)\n"), 9244 input_bfd, 9245 sym_name, 9246 howto->name, 9247 name); 9248 } 9249 } 9250 break; 9251 9252 case R_PPC_VLE_LO16A: 9253 relocation = relocation + addend; 9254 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9255 contents + rel->r_offset, relocation, 9256 split16a_type, htab->params->vle_reloc_fixup); 9257 goto copy_reloc; 9258 9259 case R_PPC_VLE_LO16D: 9260 relocation = relocation + addend; 9261 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9262 contents + rel->r_offset, relocation, 9263 split16d_type, htab->params->vle_reloc_fixup); 9264 goto copy_reloc; 9265 9266 case R_PPC_VLE_HI16A: 9267 relocation = (relocation + addend) >> 16; 9268 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9269 contents + rel->r_offset, relocation, 9270 split16a_type, htab->params->vle_reloc_fixup); 9271 goto copy_reloc; 9272 9273 case R_PPC_VLE_HI16D: 9274 relocation = (relocation + addend) >> 16; 9275 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9276 contents + rel->r_offset, relocation, 9277 split16d_type, htab->params->vle_reloc_fixup); 9278 goto copy_reloc; 9279 9280 case R_PPC_VLE_HA16A: 9281 relocation = (relocation + addend + 0x8000) >> 16; 9282 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9283 contents + rel->r_offset, relocation, 9284 split16a_type, htab->params->vle_reloc_fixup); 9285 goto copy_reloc; 9286 9287 case R_PPC_VLE_HA16D: 9288 relocation = (relocation + addend + 0x8000) >> 16; 9289 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9290 contents + rel->r_offset, relocation, 9291 split16d_type, htab->params->vle_reloc_fixup); 9292 goto copy_reloc; 9293 9294 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */ 9295 case R_PPC_EMB_SDA21: 9296 case R_PPC_VLE_SDA21: 9297 case R_PPC_EMB_RELSDA: 9298 case R_PPC_VLE_SDA21_LO: 9299 { 9300 const char *name; 9301 int reg; 9302 unsigned int insn; 9303 struct elf_link_hash_entry *sda = NULL; 9304 9305 if (sec == NULL || sec->output_section == NULL) 9306 { 9307 unresolved_reloc = TRUE; 9308 break; 9309 } 9310 9311 name = bfd_get_section_name (output_bfd, sec->output_section); 9312 if (strcmp (name, ".sdata") == 0 9313 || strcmp (name, ".sbss") == 0) 9314 { 9315 reg = 13; 9316 sda = htab->sdata[0].sym; 9317 } 9318 else if (strcmp (name, ".sdata2") == 0 9319 || strcmp (name, ".sbss2") == 0) 9320 { 9321 reg = 2; 9322 sda = htab->sdata[1].sym; 9323 } 9324 else if (strcmp (name, ".PPC.EMB.sdata0") == 0 9325 || strcmp (name, ".PPC.EMB.sbss0") == 0) 9326 { 9327 reg = 0; 9328 } 9329 else 9330 { 9331 info->callbacks->einfo 9332 /* xgettext:c-format */ 9333 (_("%P: %B: the target (%s) of a %s relocation is " 9334 "in the wrong output section (%s)\n"), 9335 input_bfd, 9336 sym_name, 9337 howto->name, 9338 name); 9339 9340 bfd_set_error (bfd_error_bad_value); 9341 ret = FALSE; 9342 goto copy_reloc; 9343 } 9344 9345 if (sda != NULL) 9346 { 9347 if (!is_static_defined (sda)) 9348 { 9349 unresolved_reloc = TRUE; 9350 break; 9351 } 9352 addend -= SYM_VAL (sda); 9353 } 9354 9355 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 9356 if (reg == 0 9357 && (r_type == R_PPC_VLE_SDA21 9358 || r_type == R_PPC_VLE_SDA21_LO)) 9359 { 9360 relocation = relocation + addend; 9361 addend = 0; 9362 9363 /* Force e_li insn, keeping RT from original insn. */ 9364 insn &= 0x1f << 21; 9365 insn |= 28u << 26; 9366 9367 /* We have an li20 field, bits 17..20, 11..15, 21..31. */ 9368 /* Top 4 bits of value to 17..20. */ 9369 insn |= (relocation & 0xf0000) >> 5; 9370 /* Next 5 bits of the value to 11..15. */ 9371 insn |= (relocation & 0xf800) << 5; 9372 /* And the final 11 bits of the value to bits 21 to 31. */ 9373 insn |= relocation & 0x7ff; 9374 9375 bfd_put_32 (input_bfd, insn, contents + rel->r_offset); 9376 9377 if (r_type == R_PPC_VLE_SDA21 9378 && ((relocation + 0x80000) & 0xffffffff) > 0x100000) 9379 goto overflow; 9380 goto copy_reloc; 9381 } 9382 else if (r_type == R_PPC_EMB_SDA21 9383 || r_type == R_PPC_VLE_SDA21 9384 || r_type == R_PPC_VLE_SDA21_LO) 9385 { 9386 /* Fill in register field. */ 9387 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); 9388 } 9389 bfd_put_32 (input_bfd, insn, contents + rel->r_offset); 9390 } 9391 break; 9392 9393 case R_PPC_VLE_SDAREL_LO16A: 9394 case R_PPC_VLE_SDAREL_LO16D: 9395 case R_PPC_VLE_SDAREL_HI16A: 9396 case R_PPC_VLE_SDAREL_HI16D: 9397 case R_PPC_VLE_SDAREL_HA16A: 9398 case R_PPC_VLE_SDAREL_HA16D: 9399 { 9400 bfd_vma value; 9401 const char *name; 9402 struct elf_link_hash_entry *sda = NULL; 9403 9404 if (sec == NULL || sec->output_section == NULL) 9405 { 9406 unresolved_reloc = TRUE; 9407 break; 9408 } 9409 9410 name = bfd_get_section_name (output_bfd, sec->output_section); 9411 if (strcmp (name, ".sdata") == 0 9412 || strcmp (name, ".sbss") == 0) 9413 sda = htab->sdata[0].sym; 9414 else if (strcmp (name, ".sdata2") == 0 9415 || strcmp (name, ".sbss2") == 0) 9416 sda = htab->sdata[1].sym; 9417 else 9418 { 9419 _bfd_error_handler 9420 /* xgettext:c-format */ 9421 (_("%B: the target (%s) of a %s relocation is " 9422 "in the wrong output section (%s)"), 9423 input_bfd, 9424 sym_name, 9425 howto->name, 9426 name); 9427 9428 bfd_set_error (bfd_error_bad_value); 9429 ret = FALSE; 9430 goto copy_reloc; 9431 } 9432 9433 if (sda == NULL || !is_static_defined (sda)) 9434 { 9435 unresolved_reloc = TRUE; 9436 break; 9437 } 9438 value = relocation + addend - SYM_VAL (sda); 9439 9440 if (r_type == R_PPC_VLE_SDAREL_LO16A) 9441 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9442 contents + rel->r_offset, value, 9443 split16a_type, 9444 htab->params->vle_reloc_fixup); 9445 else if (r_type == R_PPC_VLE_SDAREL_LO16D) 9446 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9447 contents + rel->r_offset, value, 9448 split16d_type, 9449 htab->params->vle_reloc_fixup); 9450 else if (r_type == R_PPC_VLE_SDAREL_HI16A) 9451 { 9452 value = value >> 16; 9453 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9454 contents + rel->r_offset, value, 9455 split16a_type, 9456 htab->params->vle_reloc_fixup); 9457 } 9458 else if (r_type == R_PPC_VLE_SDAREL_HI16D) 9459 { 9460 value = value >> 16; 9461 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9462 contents + rel->r_offset, value, 9463 split16d_type, 9464 htab->params->vle_reloc_fixup); 9465 } 9466 else if (r_type == R_PPC_VLE_SDAREL_HA16A) 9467 { 9468 value = (value + 0x8000) >> 16; 9469 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9470 contents + rel->r_offset, value, 9471 split16a_type, 9472 htab->params->vle_reloc_fixup); 9473 } 9474 else if (r_type == R_PPC_VLE_SDAREL_HA16D) 9475 { 9476 value = (value + 0x8000) >> 16; 9477 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, 9478 contents + rel->r_offset, value, 9479 split16d_type, 9480 htab->params->vle_reloc_fixup); 9481 } 9482 } 9483 goto copy_reloc; 9484 9485 /* Relocate against the beginning of the section. */ 9486 case R_PPC_SECTOFF: 9487 case R_PPC_SECTOFF_LO: 9488 case R_PPC_SECTOFF_HI: 9489 case R_PPC_SECTOFF_HA: 9490 if (sec == NULL || sec->output_section == NULL) 9491 { 9492 unresolved_reloc = TRUE; 9493 break; 9494 } 9495 addend -= sec->output_section->vma; 9496 break; 9497 9498 /* Negative relocations. */ 9499 case R_PPC_EMB_NADDR32: 9500 case R_PPC_EMB_NADDR16: 9501 case R_PPC_EMB_NADDR16_LO: 9502 case R_PPC_EMB_NADDR16_HI: 9503 case R_PPC_EMB_NADDR16_HA: 9504 addend -= 2 * relocation; 9505 break; 9506 9507 case R_PPC_COPY: 9508 case R_PPC_GLOB_DAT: 9509 case R_PPC_JMP_SLOT: 9510 case R_PPC_RELATIVE: 9511 case R_PPC_IRELATIVE: 9512 case R_PPC_PLT32: 9513 case R_PPC_PLTREL32: 9514 case R_PPC_PLT16_LO: 9515 case R_PPC_PLT16_HI: 9516 case R_PPC_PLT16_HA: 9517 case R_PPC_ADDR30: 9518 case R_PPC_EMB_RELSEC16: 9519 case R_PPC_EMB_RELST_LO: 9520 case R_PPC_EMB_RELST_HI: 9521 case R_PPC_EMB_RELST_HA: 9522 case R_PPC_EMB_BIT_FLD: 9523 info->callbacks->einfo 9524 /* xgettext:c-format */ 9525 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"), 9526 input_bfd, 9527 howto->name, 9528 sym_name); 9529 9530 bfd_set_error (bfd_error_invalid_operation); 9531 ret = FALSE; 9532 goto copy_reloc; 9533 } 9534 9535 /* Do any further special processing. */ 9536 switch (r_type) 9537 { 9538 default: 9539 break; 9540 9541 case R_PPC_ADDR16_HA: 9542 case R_PPC_REL16_HA: 9543 case R_PPC_REL16DX_HA: 9544 case R_PPC_SECTOFF_HA: 9545 case R_PPC_TPREL16_HA: 9546 case R_PPC_DTPREL16_HA: 9547 case R_PPC_EMB_NADDR16_HA: 9548 case R_PPC_EMB_RELST_HA: 9549 /* It's just possible that this symbol is a weak symbol 9550 that's not actually defined anywhere. In that case, 9551 'sec' would be NULL, and we should leave the symbol 9552 alone (it will be set to zero elsewhere in the link). */ 9553 if (sec == NULL) 9554 break; 9555 /* Fall through. */ 9556 9557 case R_PPC_PLT16_HA: 9558 case R_PPC_GOT16_HA: 9559 case R_PPC_GOT_TLSGD16_HA: 9560 case R_PPC_GOT_TLSLD16_HA: 9561 case R_PPC_GOT_TPREL16_HA: 9562 case R_PPC_GOT_DTPREL16_HA: 9563 /* Add 0x10000 if sign bit in 0:15 is set. 9564 Bits 0:15 are not used. */ 9565 addend += 0x8000; 9566 break; 9567 9568 case R_PPC_ADDR16: 9569 case R_PPC_ADDR16_LO: 9570 case R_PPC_GOT16: 9571 case R_PPC_GOT16_LO: 9572 case R_PPC_SDAREL16: 9573 case R_PPC_SECTOFF: 9574 case R_PPC_SECTOFF_LO: 9575 case R_PPC_DTPREL16: 9576 case R_PPC_DTPREL16_LO: 9577 case R_PPC_TPREL16: 9578 case R_PPC_TPREL16_LO: 9579 case R_PPC_GOT_TLSGD16: 9580 case R_PPC_GOT_TLSGD16_LO: 9581 case R_PPC_GOT_TLSLD16: 9582 case R_PPC_GOT_TLSLD16_LO: 9583 case R_PPC_GOT_DTPREL16: 9584 case R_PPC_GOT_DTPREL16_LO: 9585 case R_PPC_GOT_TPREL16: 9586 case R_PPC_GOT_TPREL16_LO: 9587 { 9588 /* The 32-bit ABI lacks proper relocations to deal with 9589 certain 64-bit instructions. Prevent damage to bits 9590 that make up part of the insn opcode. */ 9591 unsigned int insn, mask, lobit; 9592 9593 insn = bfd_get_32 (input_bfd, 9594 contents + rel->r_offset - d_offset); 9595 mask = 0; 9596 if (is_insn_ds_form (insn)) 9597 mask = 3; 9598 else if (is_insn_dq_form (insn)) 9599 mask = 15; 9600 else 9601 break; 9602 relocation += addend; 9603 addend = insn & mask; 9604 lobit = mask & relocation; 9605 if (lobit != 0) 9606 { 9607 relocation ^= lobit; 9608 info->callbacks->einfo 9609 /* xgettext:c-format */ 9610 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"), 9611 input_bfd, input_section, rel->r_offset, 9612 howto->name, sym_name, mask + 1); 9613 bfd_set_error (bfd_error_bad_value); 9614 ret = FALSE; 9615 } 9616 } 9617 break; 9618 } 9619 9620#ifdef DEBUG 9621 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, " 9622 "offset = %ld, addend = %ld\n", 9623 howto->name, 9624 (int) r_type, 9625 sym_name, 9626 r_symndx, 9627 (long) rel->r_offset, 9628 (long) addend); 9629#endif 9630 9631 if (unresolved_reloc 9632 && !((input_section->flags & SEC_DEBUGGING) != 0 9633 && h->def_dynamic) 9634 && _bfd_elf_section_offset (output_bfd, info, input_section, 9635 rel->r_offset) != (bfd_vma) -1) 9636 { 9637 info->callbacks->einfo 9638 /* xgettext:c-format */ 9639 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"), 9640 input_bfd, input_section, rel->r_offset, 9641 howto->name, 9642 sym_name); 9643 ret = FALSE; 9644 } 9645 9646 /* 16-bit fields in insns mostly have signed values, but a 9647 few insns have 16-bit unsigned values. Really, we should 9648 have different reloc types. */ 9649 if (howto->complain_on_overflow != complain_overflow_dont 9650 && howto->dst_mask == 0xffff 9651 && (input_section->flags & SEC_CODE) != 0) 9652 { 9653 enum complain_overflow complain = complain_overflow_signed; 9654 9655 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0) 9656 { 9657 unsigned int insn; 9658 9659 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); 9660 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */) 9661 complain = complain_overflow_bitfield; 9662 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */ 9663 || (insn & (0x3f << 26)) == 24u << 26 /* ori */ 9664 || (insn & (0x3f << 26)) == 26u << 26 /* xori */) 9665 complain = complain_overflow_unsigned; 9666 } 9667 if (howto->complain_on_overflow != complain) 9668 { 9669 alt_howto = *howto; 9670 alt_howto.complain_on_overflow = complain; 9671 howto = &alt_howto; 9672 } 9673 } 9674 9675 if (r_type == R_PPC_REL16DX_HA) 9676 { 9677 /* Split field reloc isn't handled by _bfd_final_link_relocate. */ 9678 if (rel->r_offset + 4 > input_section->size) 9679 r = bfd_reloc_outofrange; 9680 else 9681 { 9682 unsigned int insn; 9683 9684 relocation += addend; 9685 relocation -= (rel->r_offset 9686 + input_section->output_offset 9687 + input_section->output_section->vma); 9688 relocation >>= 16; 9689 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 9690 insn &= ~0x1fffc1; 9691 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15); 9692 bfd_put_32 (input_bfd, insn, contents + rel->r_offset); 9693 r = bfd_reloc_ok; 9694 } 9695 } 9696 else 9697 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents, 9698 rel->r_offset, relocation, addend); 9699 9700 if (r != bfd_reloc_ok) 9701 { 9702 if (r == bfd_reloc_overflow) 9703 { 9704 overflow: 9705 /* On code like "if (foo) foo();" don't report overflow 9706 on a branch to zero when foo is undefined. */ 9707 if (!warned 9708 && !(h != NULL 9709 && (h->root.type == bfd_link_hash_undefweak 9710 || h->root.type == bfd_link_hash_undefined) 9711 && is_branch_reloc (r_type))) 9712 info->callbacks->reloc_overflow 9713 (info, (h ? &h->root : NULL), sym_name, howto->name, 9714 rel->r_addend, input_bfd, input_section, rel->r_offset); 9715 } 9716 else 9717 { 9718 info->callbacks->einfo 9719 /* xgettext:c-format */ 9720 (_("%P: %H: %s reloc against `%s': error %d\n"), 9721 input_bfd, input_section, rel->r_offset, 9722 howto->name, sym_name, (int) r); 9723 ret = FALSE; 9724 } 9725 } 9726 copy_reloc: 9727 if (wrel != rel) 9728 *wrel = *rel; 9729 } 9730 9731 if (wrel != rel) 9732 { 9733 Elf_Internal_Shdr *rel_hdr; 9734 size_t deleted = rel - wrel; 9735 9736 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); 9737 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; 9738 if (rel_hdr->sh_size == 0) 9739 { 9740 /* It is too late to remove an empty reloc section. Leave 9741 one NONE reloc. 9742 ??? What is wrong with an empty section??? */ 9743 rel_hdr->sh_size = rel_hdr->sh_entsize; 9744 deleted -= 1; 9745 wrel++; 9746 } 9747 relend = wrel; 9748 rel_hdr = _bfd_elf_single_rel_hdr (input_section); 9749 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; 9750 input_section->reloc_count -= deleted; 9751 } 9752 9753#ifdef DEBUG 9754 fprintf (stderr, "\n"); 9755#endif 9756 9757 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET 9758 && input_section->size != input_section->rawsize 9759 && (strcmp (input_section->output_section->name, ".init") == 0 9760 || strcmp (input_section->output_section->name, ".fini") == 0)) 9761 { 9762 /* Branch around the trampolines. */ 9763 unsigned int insn = B + input_section->size - input_section->rawsize; 9764 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize); 9765 } 9766 9767 if (htab->params->ppc476_workaround 9768 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET 9769 && (!bfd_link_relocatable (info) 9770 || (input_section->output_section->alignment_power 9771 >= htab->params->pagesize_p2))) 9772 { 9773 bfd_vma start_addr, end_addr, addr; 9774 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; 9775 9776 if (relax_info->workaround_size != 0) 9777 { 9778 bfd_byte *p; 9779 unsigned int n; 9780 bfd_byte fill[4]; 9781 9782 bfd_put_32 (input_bfd, BA, fill); 9783 p = contents + input_section->size - relax_info->workaround_size; 9784 n = relax_info->workaround_size >> 2; 9785 while (n--) 9786 { 9787 memcpy (p, fill, 4); 9788 p += 4; 9789 } 9790 } 9791 9792 /* The idea is: Replace the last instruction on a page with a 9793 branch to a patch area. Put the insn there followed by a 9794 branch back to the next page. Complicated a little by 9795 needing to handle moved conditional branches, and by not 9796 wanting to touch data-in-text. */ 9797 9798 start_addr = (input_section->output_section->vma 9799 + input_section->output_offset); 9800 end_addr = (start_addr + input_section->size 9801 - relax_info->workaround_size); 9802 for (addr = ((start_addr & -pagesize) + pagesize - 4); 9803 addr < end_addr; 9804 addr += pagesize) 9805 { 9806 bfd_vma offset = addr - start_addr; 9807 Elf_Internal_Rela *lo, *hi; 9808 bfd_boolean is_data; 9809 bfd_vma patch_off, patch_addr; 9810 unsigned int insn; 9811 9812 /* Do we have a data reloc at this offset? If so, leave 9813 the word alone. */ 9814 is_data = FALSE; 9815 lo = relocs; 9816 hi = relend; 9817 rel = NULL; 9818 while (lo < hi) 9819 { 9820 rel = lo + (hi - lo) / 2; 9821 if (rel->r_offset < offset) 9822 lo = rel + 1; 9823 else if (rel->r_offset > offset + 3) 9824 hi = rel; 9825 else 9826 { 9827 switch (ELF32_R_TYPE (rel->r_info)) 9828 { 9829 case R_PPC_ADDR32: 9830 case R_PPC_UADDR32: 9831 case R_PPC_REL32: 9832 case R_PPC_ADDR30: 9833 is_data = TRUE; 9834 break; 9835 default: 9836 break; 9837 } 9838 break; 9839 } 9840 } 9841 if (is_data) 9842 continue; 9843 9844 /* Some instructions can be left alone too. Unconditional 9845 branches, except for bcctr with BO=0x14 (bctr, bctrl), 9846 avoid the icache failure. 9847 9848 The problem occurs due to prefetch across a page boundary 9849 where stale instructions can be fetched from the next 9850 page, and the mechanism for flushing these bad 9851 instructions fails under certain circumstances. The 9852 unconditional branches: 9853 1) Branch: b, bl, ba, bla, 9854 2) Branch Conditional: bc, bca, bcl, bcla, 9855 3) Branch Conditional to Link Register: bclr, bclrl, 9856 where (2) and (3) have BO=0x14 making them unconditional, 9857 prevent the bad prefetch because the prefetch itself is 9858 affected by these instructions. This happens even if the 9859 instruction is not executed. 9860 9861 A bctr example: 9862 . 9863 . lis 9,new_page@ha 9864 . addi 9,9,new_page@l 9865 . mtctr 9 9866 . bctr 9867 . nop 9868 . nop 9869 . new_page: 9870 . 9871 The bctr is not predicted taken due to ctr not being 9872 ready, so prefetch continues on past the bctr into the 9873 new page which might have stale instructions. If they 9874 fail to be flushed, then they will be executed after the 9875 bctr executes. Either of the following modifications 9876 prevent the bad prefetch from happening in the first 9877 place: 9878 . 9879 . lis 9,new_page@ha lis 9,new_page@ha 9880 . addi 9,9,new_page@l addi 9,9,new_page@l 9881 . mtctr 9 mtctr 9 9882 . bctr bctr 9883 . nop b somewhere_else 9884 . b somewhere_else nop 9885 . new_page: new_page: 9886 . */ 9887 insn = bfd_get_32 (input_bfd, contents + offset); 9888 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */ 9889 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/ 9890 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */ 9891 || ((insn & (0x3f << 26)) == (19u << 26) 9892 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */ 9893 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */ 9894 continue; 9895 9896 patch_addr = (start_addr + input_section->size 9897 - relax_info->workaround_size); 9898 patch_addr = (patch_addr + 15) & -16; 9899 patch_off = patch_addr - start_addr; 9900 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset); 9901 9902 if (rel != NULL 9903 && rel->r_offset >= offset 9904 && rel->r_offset < offset + 4) 9905 { 9906 asection *sreloc; 9907 9908 /* If the insn we are patching had a reloc, adjust the 9909 reloc r_offset so that the reloc applies to the moved 9910 location. This matters for -r and --emit-relocs. */ 9911 if (rel + 1 != relend) 9912 { 9913 Elf_Internal_Rela tmp = *rel; 9914 9915 /* Keep the relocs sorted by r_offset. */ 9916 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel)); 9917 relend[-1] = tmp; 9918 } 9919 relend[-1].r_offset += patch_off - offset; 9920 9921 /* Adjust REL16 addends too. */ 9922 switch (ELF32_R_TYPE (relend[-1].r_info)) 9923 { 9924 case R_PPC_REL16: 9925 case R_PPC_REL16_LO: 9926 case R_PPC_REL16_HI: 9927 case R_PPC_REL16_HA: 9928 relend[-1].r_addend += patch_off - offset; 9929 break; 9930 default: 9931 break; 9932 } 9933 9934 /* If we are building a PIE or shared library with 9935 non-PIC objects, perhaps we had a dynamic reloc too? 9936 If so, the dynamic reloc must move with the insn. */ 9937 sreloc = elf_section_data (input_section)->sreloc; 9938 if (sreloc != NULL) 9939 { 9940 Elf32_External_Rela *slo, *shi, *srelend; 9941 bfd_vma soffset; 9942 9943 slo = (Elf32_External_Rela *) sreloc->contents; 9944 shi = srelend = slo + sreloc->reloc_count; 9945 soffset = (offset + input_section->output_section->vma 9946 + input_section->output_offset); 9947 while (slo < shi) 9948 { 9949 Elf32_External_Rela *srel = slo + (shi - slo) / 2; 9950 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel, 9951 &outrel); 9952 if (outrel.r_offset < soffset) 9953 slo = srel + 1; 9954 else if (outrel.r_offset > soffset + 3) 9955 shi = srel; 9956 else 9957 { 9958 if (srel + 1 != srelend) 9959 { 9960 memmove (srel, srel + 1, 9961 (srelend - (srel + 1)) * sizeof (*srel)); 9962 srel = srelend - 1; 9963 } 9964 outrel.r_offset += patch_off - offset; 9965 bfd_elf32_swap_reloca_out (output_bfd, &outrel, 9966 (bfd_byte *) srel); 9967 break; 9968 } 9969 } 9970 } 9971 } 9972 else 9973 rel = NULL; 9974 9975 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */ 9976 && (insn & 2) == 0 /* relative */) 9977 { 9978 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000; 9979 9980 delta += offset - patch_off; 9981 if (bfd_link_relocatable (info) && rel != NULL) 9982 delta = 0; 9983 if (!bfd_link_relocatable (info) && rel != NULL) 9984 { 9985 enum elf_ppc_reloc_type r_type; 9986 9987 r_type = ELF32_R_TYPE (relend[-1].r_info); 9988 if (r_type == R_PPC_REL14_BRTAKEN) 9989 insn |= BRANCH_PREDICT_BIT; 9990 else if (r_type == R_PPC_REL14_BRNTAKEN) 9991 insn &= ~BRANCH_PREDICT_BIT; 9992 else 9993 BFD_ASSERT (r_type == R_PPC_REL14); 9994 9995 if ((r_type == R_PPC_REL14_BRTAKEN 9996 || r_type == R_PPC_REL14_BRNTAKEN) 9997 && delta + 0x8000 < 0x10000 9998 && (bfd_signed_vma) delta < 0) 9999 insn ^= BRANCH_PREDICT_BIT; 10000 } 10001 if (delta + 0x8000 < 0x10000) 10002 { 10003 bfd_put_32 (input_bfd, 10004 (insn & ~0xfffc) | (delta & 0xfffc), 10005 contents + patch_off); 10006 patch_off += 4; 10007 bfd_put_32 (input_bfd, 10008 B | ((offset + 4 - patch_off) & 0x3fffffc), 10009 contents + patch_off); 10010 patch_off += 4; 10011 } 10012 else 10013 { 10014 if (rel != NULL) 10015 { 10016 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info); 10017 10018 relend[-1].r_offset += 8; 10019 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24); 10020 } 10021 bfd_put_32 (input_bfd, 10022 (insn & ~0xfffc) | 8, 10023 contents + patch_off); 10024 patch_off += 4; 10025 bfd_put_32 (input_bfd, 10026 B | ((offset + 4 - patch_off) & 0x3fffffc), 10027 contents + patch_off); 10028 patch_off += 4; 10029 bfd_put_32 (input_bfd, 10030 B | ((delta - 8) & 0x3fffffc), 10031 contents + patch_off); 10032 patch_off += 4; 10033 } 10034 } 10035 else 10036 { 10037 bfd_put_32 (input_bfd, insn, contents + patch_off); 10038 patch_off += 4; 10039 bfd_put_32 (input_bfd, 10040 B | ((offset + 4 - patch_off) & 0x3fffffc), 10041 contents + patch_off); 10042 patch_off += 4; 10043 } 10044 BFD_ASSERT (patch_off <= input_section->size); 10045 relax_info->workaround_size = input_section->size - patch_off; 10046 } 10047 } 10048 10049 return ret; 10050} 10051 10052/* Finish up dynamic symbol handling. We set the contents of various 10053 dynamic sections here. */ 10054 10055static bfd_boolean 10056ppc_elf_finish_dynamic_symbol (bfd *output_bfd, 10057 struct bfd_link_info *info, 10058 struct elf_link_hash_entry *h, 10059 Elf_Internal_Sym *sym) 10060{ 10061 struct ppc_elf_link_hash_table *htab; 10062 struct plt_entry *ent; 10063 bfd_boolean doneone; 10064 10065#ifdef DEBUG 10066 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", 10067 h->root.root.string); 10068#endif 10069 10070 htab = ppc_elf_hash_table (info); 10071 BFD_ASSERT (htab->elf.dynobj != NULL); 10072 10073 doneone = FALSE; 10074 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 10075 if (ent->plt.offset != (bfd_vma) -1) 10076 { 10077 if (!doneone) 10078 { 10079 Elf_Internal_Rela rela; 10080 bfd_byte *loc; 10081 bfd_vma reloc_index; 10082 10083 if (htab->plt_type == PLT_NEW 10084 || !htab->elf.dynamic_sections_created 10085 || h->dynindx == -1) 10086 reloc_index = ent->plt.offset / 4; 10087 else 10088 { 10089 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size) 10090 / htab->plt_slot_size); 10091 if (reloc_index > PLT_NUM_SINGLE_ENTRIES 10092 && htab->plt_type == PLT_OLD) 10093 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; 10094 } 10095 10096 /* This symbol has an entry in the procedure linkage table. 10097 Set it up. */ 10098 if (htab->plt_type == PLT_VXWORKS 10099 && htab->elf.dynamic_sections_created 10100 && h->dynindx != -1) 10101 { 10102 bfd_vma got_offset; 10103 const bfd_vma *plt_entry; 10104 10105 /* The first three entries in .got.plt are reserved. */ 10106 got_offset = (reloc_index + 3) * 4; 10107 10108 /* Use the right PLT. */ 10109 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry 10110 : ppc_elf_vxworks_plt_entry; 10111 10112 /* Fill in the .plt on VxWorks. */ 10113 if (bfd_link_pic (info)) 10114 { 10115 bfd_put_32 (output_bfd, 10116 plt_entry[0] | PPC_HA (got_offset), 10117 htab->elf.splt->contents + ent->plt.offset + 0); 10118 bfd_put_32 (output_bfd, 10119 plt_entry[1] | PPC_LO (got_offset), 10120 htab->elf.splt->contents + ent->plt.offset + 4); 10121 } 10122 else 10123 { 10124 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot); 10125 10126 bfd_put_32 (output_bfd, 10127 plt_entry[0] | PPC_HA (got_loc), 10128 htab->elf.splt->contents + ent->plt.offset + 0); 10129 bfd_put_32 (output_bfd, 10130 plt_entry[1] | PPC_LO (got_loc), 10131 htab->elf.splt->contents + ent->plt.offset + 4); 10132 } 10133 10134 bfd_put_32 (output_bfd, plt_entry[2], 10135 htab->elf.splt->contents + ent->plt.offset + 8); 10136 bfd_put_32 (output_bfd, plt_entry[3], 10137 htab->elf.splt->contents + ent->plt.offset + 12); 10138 10139 /* This instruction is an immediate load. The value loaded is 10140 the byte offset of the R_PPC_JMP_SLOT relocation from the 10141 start of the .rela.plt section. The value is stored in the 10142 low-order 16 bits of the load instruction. */ 10143 /* NOTE: It appears that this is now an index rather than a 10144 prescaled offset. */ 10145 bfd_put_32 (output_bfd, 10146 plt_entry[4] | reloc_index, 10147 htab->elf.splt->contents + ent->plt.offset + 16); 10148 /* This instruction is a PC-relative branch whose target is 10149 the start of the PLT section. The address of this branch 10150 instruction is 20 bytes beyond the start of this PLT entry. 10151 The address is encoded in bits 6-29, inclusive. The value 10152 stored is right-shifted by two bits, permitting a 26-bit 10153 offset. */ 10154 bfd_put_32 (output_bfd, 10155 (plt_entry[5] 10156 | (-(ent->plt.offset + 20) & 0x03fffffc)), 10157 htab->elf.splt->contents + ent->plt.offset + 20); 10158 bfd_put_32 (output_bfd, plt_entry[6], 10159 htab->elf.splt->contents + ent->plt.offset + 24); 10160 bfd_put_32 (output_bfd, plt_entry[7], 10161 htab->elf.splt->contents + ent->plt.offset + 28); 10162 10163 /* Fill in the GOT entry corresponding to this PLT slot with 10164 the address immediately after the "bctr" instruction 10165 in this PLT entry. */ 10166 bfd_put_32 (output_bfd, (htab->elf.splt->output_section->vma 10167 + htab->elf.splt->output_offset 10168 + ent->plt.offset + 16), 10169 htab->elf.sgotplt->contents + got_offset); 10170 10171 if (!bfd_link_pic (info)) 10172 { 10173 /* Fill in a couple of entries in .rela.plt.unloaded. */ 10174 loc = htab->srelplt2->contents 10175 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index 10176 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS) 10177 * sizeof (Elf32_External_Rela)); 10178 10179 /* Provide the @ha relocation for the first instruction. */ 10180 rela.r_offset = (htab->elf.splt->output_section->vma 10181 + htab->elf.splt->output_offset 10182 + ent->plt.offset + 2); 10183 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, 10184 R_PPC_ADDR16_HA); 10185 rela.r_addend = got_offset; 10186 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10187 loc += sizeof (Elf32_External_Rela); 10188 10189 /* Provide the @l relocation for the second instruction. */ 10190 rela.r_offset = (htab->elf.splt->output_section->vma 10191 + htab->elf.splt->output_offset 10192 + ent->plt.offset + 6); 10193 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, 10194 R_PPC_ADDR16_LO); 10195 rela.r_addend = got_offset; 10196 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10197 loc += sizeof (Elf32_External_Rela); 10198 10199 /* Provide a relocation for the GOT entry corresponding to this 10200 PLT slot. Point it at the middle of the .plt entry. */ 10201 rela.r_offset = (htab->elf.sgotplt->output_section->vma 10202 + htab->elf.sgotplt->output_offset 10203 + got_offset); 10204 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx, 10205 R_PPC_ADDR32); 10206 rela.r_addend = ent->plt.offset + 16; 10207 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10208 } 10209 10210 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT. 10211 In particular, the offset for the relocation is not the 10212 address of the PLT entry for this function, as specified 10213 by the ABI. Instead, the offset is set to the address of 10214 the GOT slot for this function. See EABI 4.4.4.1. */ 10215 rela.r_offset = (htab->elf.sgotplt->output_section->vma 10216 + htab->elf.sgotplt->output_offset 10217 + got_offset); 10218 10219 } 10220 else 10221 { 10222 asection *splt = htab->elf.splt; 10223 if (!htab->elf.dynamic_sections_created 10224 || h->dynindx == -1) 10225 splt = htab->elf.iplt; 10226 10227 rela.r_offset = (splt->output_section->vma 10228 + splt->output_offset 10229 + ent->plt.offset); 10230 if (htab->plt_type == PLT_OLD 10231 || !htab->elf.dynamic_sections_created 10232 || h->dynindx == -1) 10233 { 10234 /* We don't need to fill in the .plt. The ppc dynamic 10235 linker will fill it in. */ 10236 } 10237 else 10238 { 10239 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset 10240 + htab->glink->output_section->vma 10241 + htab->glink->output_offset); 10242 bfd_put_32 (output_bfd, val, 10243 splt->contents + ent->plt.offset); 10244 } 10245 } 10246 10247 /* Fill in the entry in the .rela.plt section. */ 10248 rela.r_addend = 0; 10249 if (!htab->elf.dynamic_sections_created 10250 || h->dynindx == -1) 10251 { 10252 BFD_ASSERT (h->type == STT_GNU_IFUNC 10253 && h->def_regular 10254 && (h->root.type == bfd_link_hash_defined 10255 || h->root.type == bfd_link_hash_defweak)); 10256 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 10257 rela.r_addend = SYM_VAL (h); 10258 } 10259 else 10260 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); 10261 10262 if (!htab->elf.dynamic_sections_created 10263 || h->dynindx == -1) 10264 loc = (htab->elf.irelplt->contents 10265 + (htab->elf.irelplt->reloc_count++ 10266 * sizeof (Elf32_External_Rela))); 10267 else 10268 loc = (htab->elf.srelplt->contents 10269 + reloc_index * sizeof (Elf32_External_Rela)); 10270 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10271 10272 if (!h->def_regular) 10273 { 10274 /* Mark the symbol as undefined, rather than as 10275 defined in the .plt section. Leave the value if 10276 there were any relocations where pointer equality 10277 matters (this is a clue for the dynamic linker, to 10278 make function pointer comparisons work between an 10279 application and shared library), otherwise set it 10280 to zero. */ 10281 sym->st_shndx = SHN_UNDEF; 10282 if (!h->pointer_equality_needed) 10283 sym->st_value = 0; 10284 else if (!h->ref_regular_nonweak) 10285 { 10286 /* This breaks function pointer comparisons, but 10287 that is better than breaking tests for a NULL 10288 function pointer. */ 10289 sym->st_value = 0; 10290 } 10291 } 10292 else if (h->type == STT_GNU_IFUNC 10293 && !bfd_link_pic (info)) 10294 { 10295 /* Set the value of ifunc symbols in a non-pie 10296 executable to the glink entry. This is to avoid 10297 text relocations. We can't do this for ifunc in 10298 allocate_dynrelocs, as we do for normal dynamic 10299 function symbols with plt entries, because we need 10300 to keep the original value around for the ifunc 10301 relocation. */ 10302 sym->st_shndx = (_bfd_elf_section_from_bfd_section 10303 (output_bfd, htab->glink->output_section)); 10304 sym->st_value = (ent->glink_offset 10305 + htab->glink->output_offset 10306 + htab->glink->output_section->vma); 10307 } 10308 doneone = TRUE; 10309 } 10310 10311 if (htab->plt_type == PLT_NEW 10312 || !htab->elf.dynamic_sections_created 10313 || h->dynindx == -1) 10314 { 10315 unsigned char *p; 10316 asection *splt = htab->elf.splt; 10317 if (!htab->elf.dynamic_sections_created 10318 || h->dynindx == -1) 10319 splt = htab->elf.iplt; 10320 10321 p = (unsigned char *) htab->glink->contents + ent->glink_offset; 10322 10323 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt) 10324 { 10325 bfd_put_32 (output_bfd, LWZ_11_3, p); 10326 p += 4; 10327 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p); 10328 p += 4; 10329 bfd_put_32 (output_bfd, MR_0_3, p); 10330 p += 4; 10331 bfd_put_32 (output_bfd, CMPWI_11_0, p); 10332 p += 4; 10333 bfd_put_32 (output_bfd, ADD_3_12_2, p); 10334 p += 4; 10335 bfd_put_32 (output_bfd, BEQLR, p); 10336 p += 4; 10337 bfd_put_32 (output_bfd, MR_3_0, p); 10338 p += 4; 10339 bfd_put_32 (output_bfd, NOP, p); 10340 p += 4; 10341 } 10342 10343 write_glink_stub (ent, splt, p, info); 10344 10345 if (!bfd_link_pic (info)) 10346 /* We only need one non-PIC glink stub. */ 10347 break; 10348 } 10349 else 10350 break; 10351 } 10352 10353 if (h->needs_copy) 10354 { 10355 asection *s; 10356 Elf_Internal_Rela rela; 10357 bfd_byte *loc; 10358 10359 /* This symbols needs a copy reloc. Set it up. */ 10360 10361#ifdef DEBUG 10362 fprintf (stderr, ", copy"); 10363#endif 10364 10365 BFD_ASSERT (h->dynindx != -1); 10366 10367 if (ppc_elf_hash_entry (h)->has_sda_refs) 10368 s = htab->relsbss; 10369 else if (h->root.u.def.section == htab->elf.sdynrelro) 10370 s = htab->elf.sreldynrelro; 10371 else 10372 s = htab->elf.srelbss; 10373 BFD_ASSERT (s != NULL); 10374 10375 rela.r_offset = SYM_VAL (h); 10376 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); 10377 rela.r_addend = 0; 10378 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 10379 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10380 } 10381 10382#ifdef DEBUG 10383 fprintf (stderr, "\n"); 10384#endif 10385 10386 return TRUE; 10387} 10388 10389static enum elf_reloc_type_class 10390ppc_elf_reloc_type_class (const struct bfd_link_info *info, 10391 const asection *rel_sec, 10392 const Elf_Internal_Rela *rela) 10393{ 10394 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 10395 10396 if (rel_sec == htab->elf.irelplt) 10397 return reloc_class_ifunc; 10398 10399 switch (ELF32_R_TYPE (rela->r_info)) 10400 { 10401 case R_PPC_RELATIVE: 10402 return reloc_class_relative; 10403 case R_PPC_JMP_SLOT: 10404 return reloc_class_plt; 10405 case R_PPC_COPY: 10406 return reloc_class_copy; 10407 default: 10408 return reloc_class_normal; 10409 } 10410} 10411 10412/* Finish up the dynamic sections. */ 10413 10414static bfd_boolean 10415ppc_elf_finish_dynamic_sections (bfd *output_bfd, 10416 struct bfd_link_info *info) 10417{ 10418 asection *sdyn; 10419 struct ppc_elf_link_hash_table *htab; 10420 bfd_vma got; 10421 bfd *dynobj; 10422 bfd_boolean ret = TRUE; 10423 10424#ifdef DEBUG 10425 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); 10426#endif 10427 10428 htab = ppc_elf_hash_table (info); 10429 dynobj = htab->elf.dynobj; 10430 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 10431 10432 got = 0; 10433 if (htab->elf.hgot != NULL) 10434 got = SYM_VAL (htab->elf.hgot); 10435 10436 if (htab->elf.dynamic_sections_created) 10437 { 10438 Elf32_External_Dyn *dyncon, *dynconend; 10439 10440 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL); 10441 10442 dyncon = (Elf32_External_Dyn *) sdyn->contents; 10443 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 10444 for (; dyncon < dynconend; dyncon++) 10445 { 10446 Elf_Internal_Dyn dyn; 10447 asection *s; 10448 10449 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 10450 10451 switch (dyn.d_tag) 10452 { 10453 case DT_PLTGOT: 10454 if (htab->is_vxworks) 10455 s = htab->elf.sgotplt; 10456 else 10457 s = htab->elf.splt; 10458 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 10459 break; 10460 10461 case DT_PLTRELSZ: 10462 dyn.d_un.d_val = htab->elf.srelplt->size; 10463 break; 10464 10465 case DT_JMPREL: 10466 s = htab->elf.srelplt; 10467 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 10468 break; 10469 10470 case DT_PPC_GOT: 10471 dyn.d_un.d_ptr = got; 10472 break; 10473 10474 default: 10475 if (htab->is_vxworks 10476 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) 10477 break; 10478 continue; 10479 } 10480 10481 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 10482 } 10483 } 10484 10485 if (htab->elf.sgot != NULL 10486 && htab->elf.sgot->output_section != bfd_abs_section_ptr) 10487 { 10488 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot 10489 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt) 10490 { 10491 unsigned char *p = htab->elf.hgot->root.u.def.section->contents; 10492 10493 p += htab->elf.hgot->root.u.def.value; 10494 if (htab->plt_type == PLT_OLD) 10495 { 10496 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 10497 so that a function can easily find the address of 10498 _GLOBAL_OFFSET_TABLE_. */ 10499 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4 10500 < htab->elf.hgot->root.u.def.section->size); 10501 bfd_put_32 (output_bfd, 0x4e800021, p - 4); 10502 } 10503 10504 if (sdyn != NULL) 10505 { 10506 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset; 10507 BFD_ASSERT (htab->elf.hgot->root.u.def.value 10508 < htab->elf.hgot->root.u.def.section->size); 10509 bfd_put_32 (output_bfd, val, p); 10510 } 10511 } 10512 else 10513 { 10514 /* xgettext:c-format */ 10515 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"), 10516 htab->elf.hgot->root.root.string, 10517 (htab->elf.sgotplt != NULL 10518 ? htab->elf.sgotplt->name 10519 : htab->elf.sgot->name)); 10520 bfd_set_error (bfd_error_bad_value); 10521 ret = FALSE; 10522 } 10523 10524 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4; 10525 } 10526 10527 /* Fill in the first entry in the VxWorks procedure linkage table. */ 10528 if (htab->is_vxworks 10529 && htab->elf.splt != NULL 10530 && htab->elf.splt->size != 0 10531 && htab->elf.splt->output_section != bfd_abs_section_ptr) 10532 { 10533 asection *splt = htab->elf.splt; 10534 /* Use the right PLT. */ 10535 const bfd_vma *plt_entry = (bfd_link_pic (info) 10536 ? ppc_elf_vxworks_pic_plt0_entry 10537 : ppc_elf_vxworks_plt0_entry); 10538 10539 if (!bfd_link_pic (info)) 10540 { 10541 bfd_vma got_value = SYM_VAL (htab->elf.hgot); 10542 10543 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value), 10544 splt->contents + 0); 10545 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value), 10546 splt->contents + 4); 10547 } 10548 else 10549 { 10550 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0); 10551 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4); 10552 } 10553 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8); 10554 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12); 10555 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16); 10556 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20); 10557 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24); 10558 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28); 10559 10560 if (! bfd_link_pic (info)) 10561 { 10562 Elf_Internal_Rela rela; 10563 bfd_byte *loc; 10564 10565 loc = htab->srelplt2->contents; 10566 10567 /* Output the @ha relocation for the first instruction. */ 10568 rela.r_offset = (htab->elf.splt->output_section->vma 10569 + htab->elf.splt->output_offset 10570 + 2); 10571 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); 10572 rela.r_addend = 0; 10573 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10574 loc += sizeof (Elf32_External_Rela); 10575 10576 /* Output the @l relocation for the second instruction. */ 10577 rela.r_offset = (htab->elf.splt->output_section->vma 10578 + htab->elf.splt->output_offset 10579 + 6); 10580 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); 10581 rela.r_addend = 0; 10582 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10583 loc += sizeof (Elf32_External_Rela); 10584 10585 /* Fix up the remaining relocations. They may have the wrong 10586 symbol index for _G_O_T_ or _P_L_T_ depending on the order 10587 in which symbols were output. */ 10588 while (loc < htab->srelplt2->contents + htab->srelplt2->size) 10589 { 10590 Elf_Internal_Rela rel; 10591 10592 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 10593 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); 10594 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 10595 loc += sizeof (Elf32_External_Rela); 10596 10597 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 10598 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); 10599 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 10600 loc += sizeof (Elf32_External_Rela); 10601 10602 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 10603 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32); 10604 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 10605 loc += sizeof (Elf32_External_Rela); 10606 } 10607 } 10608 } 10609 10610 if (htab->glink != NULL 10611 && htab->glink->contents != NULL 10612 && htab->elf.dynamic_sections_created) 10613 { 10614 unsigned char *p; 10615 unsigned char *endp; 10616 bfd_vma res0; 10617 unsigned int i; 10618 10619 /* 10620 * PIC glink code is the following: 10621 * 10622 * # ith PLT code stub. 10623 * addis 11,30,(plt+(i-1)*4-got)@ha 10624 * lwz 11,(plt+(i-1)*4-got)@l(11) 10625 * mtctr 11 10626 * bctr 10627 * 10628 * # A table of branches, one for each plt entry. 10629 * # The idea is that the plt call stub loads ctr and r11 with these 10630 * # addresses, so (r11 - res_0) gives the plt index * 4. 10631 * res_0: b PLTresolve 10632 * res_1: b PLTresolve 10633 * . 10634 * # Some number of entries towards the end can be nops 10635 * res_n_m3: nop 10636 * res_n_m2: nop 10637 * res_n_m1: 10638 * 10639 * PLTresolve: 10640 * addis 11,11,(1f-res_0)@ha 10641 * mflr 0 10642 * bcl 20,31,1f 10643 * 1: addi 11,11,(1b-res_0)@l 10644 * mflr 12 10645 * mtlr 0 10646 * sub 11,11,12 # r11 = index * 4 10647 * addis 12,12,(got+4-1b)@ha 10648 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve 10649 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address 10650 * mtctr 0 10651 * add 0,11,11 10652 * add 11,0,11 # r11 = index * 12 = reloc offset. 10653 * bctr 10654 */ 10655 static const unsigned int pic_plt_resolve[] = 10656 { 10657 ADDIS_11_11, 10658 MFLR_0, 10659 BCL_20_31, 10660 ADDI_11_11, 10661 MFLR_12, 10662 MTLR_0, 10663 SUB_11_11_12, 10664 ADDIS_12_12, 10665 LWZ_0_12, 10666 LWZ_12_12, 10667 MTCTR_0, 10668 ADD_0_11_11, 10669 ADD_11_0_11, 10670 BCTR, 10671 NOP, 10672 NOP 10673 }; 10674 10675 /* 10676 * Non-PIC glink code is a little simpler. 10677 * 10678 * # ith PLT code stub. 10679 * lis 11,(plt+(i-1)*4)@ha 10680 * lwz 11,(plt+(i-1)*4)@l(11) 10681 * mtctr 11 10682 * bctr 10683 * 10684 * The branch table is the same, then comes 10685 * 10686 * PLTresolve: 10687 * lis 12,(got+4)@ha 10688 * addis 11,11,(-res_0)@ha 10689 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve 10690 * addi 11,11,(-res_0)@l # r11 = index * 4 10691 * mtctr 0 10692 * add 0,11,11 10693 * lwz 12,(got+8)@l(12) # got[2] contains the map address 10694 * add 11,0,11 # r11 = index * 12 = reloc offset. 10695 * bctr 10696 */ 10697 static const unsigned int plt_resolve[] = 10698 { 10699 LIS_12, 10700 ADDIS_11_11, 10701 LWZ_0_12, 10702 ADDI_11_11, 10703 MTCTR_0, 10704 ADD_0_11_11, 10705 LWZ_12_12, 10706 ADD_11_0_11, 10707 BCTR, 10708 NOP, 10709 NOP, 10710 NOP, 10711 NOP, 10712 NOP, 10713 NOP, 10714 NOP 10715 }; 10716 10717 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4) 10718 abort (); 10719 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4) 10720 abort (); 10721 10722 /* Build the branch table, one for each plt entry (less one), 10723 and perhaps some padding. */ 10724 p = htab->glink->contents; 10725 p += htab->glink_pltresolve; 10726 endp = htab->glink->contents; 10727 endp += htab->glink->size - GLINK_PLTRESOLVE; 10728 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4)) 10729 { 10730 bfd_put_32 (output_bfd, B + endp - p, p); 10731 p += 4; 10732 } 10733 while (p < endp) 10734 { 10735 bfd_put_32 (output_bfd, NOP, p); 10736 p += 4; 10737 } 10738 10739 res0 = (htab->glink_pltresolve 10740 + htab->glink->output_section->vma 10741 + htab->glink->output_offset); 10742 10743 if (htab->params->ppc476_workaround) 10744 { 10745 /* Ensure that a call stub at the end of a page doesn't 10746 result in prefetch over the end of the page into the 10747 glink branch table. */ 10748 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; 10749 bfd_vma page_addr; 10750 bfd_vma glink_start = (htab->glink->output_section->vma 10751 + htab->glink->output_offset); 10752 10753 for (page_addr = res0 & -pagesize; 10754 page_addr > glink_start; 10755 page_addr -= pagesize) 10756 { 10757 /* We have a plt call stub that may need fixing. */ 10758 bfd_byte *loc; 10759 unsigned int insn; 10760 10761 loc = htab->glink->contents + page_addr - 4 - glink_start; 10762 insn = bfd_get_32 (output_bfd, loc); 10763 if (insn == BCTR) 10764 { 10765 /* By alignment, we know that there must be at least 10766 one other call stub before this one. */ 10767 insn = bfd_get_32 (output_bfd, loc - 16); 10768 if (insn == BCTR) 10769 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc); 10770 else 10771 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc); 10772 } 10773 } 10774 } 10775 10776 /* Last comes the PLTresolve stub. */ 10777 if (bfd_link_pic (info)) 10778 { 10779 bfd_vma bcl; 10780 10781 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++) 10782 { 10783 unsigned int insn = pic_plt_resolve[i]; 10784 10785 if (htab->params->ppc476_workaround && insn == NOP) 10786 insn = BA + 0; 10787 bfd_put_32 (output_bfd, insn, p); 10788 p += 4; 10789 } 10790 p -= 4 * ARRAY_SIZE (pic_plt_resolve); 10791 10792 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4 10793 + htab->glink->output_section->vma 10794 + htab->glink->output_offset); 10795 10796 bfd_put_32 (output_bfd, 10797 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4); 10798 bfd_put_32 (output_bfd, 10799 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4); 10800 bfd_put_32 (output_bfd, 10801 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4); 10802 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl)) 10803 { 10804 bfd_put_32 (output_bfd, 10805 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); 10806 bfd_put_32 (output_bfd, 10807 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4); 10808 } 10809 else 10810 { 10811 bfd_put_32 (output_bfd, 10812 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); 10813 bfd_put_32 (output_bfd, 10814 LWZ_12_12 + 4, p + 9*4); 10815 } 10816 } 10817 else 10818 { 10819 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++) 10820 { 10821 unsigned int insn = plt_resolve[i]; 10822 10823 if (htab->params->ppc476_workaround && insn == NOP) 10824 insn = BA + 0; 10825 bfd_put_32 (output_bfd, insn, p); 10826 p += 4; 10827 } 10828 p -= 4 * ARRAY_SIZE (plt_resolve); 10829 10830 bfd_put_32 (output_bfd, 10831 LIS_12 + PPC_HA (got + 4), p + 0*4); 10832 bfd_put_32 (output_bfd, 10833 ADDIS_11_11 + PPC_HA (-res0), p + 1*4); 10834 bfd_put_32 (output_bfd, 10835 ADDI_11_11 + PPC_LO (-res0), p + 3*4); 10836 if (PPC_HA (got + 4) == PPC_HA (got + 8)) 10837 { 10838 bfd_put_32 (output_bfd, 10839 LWZ_0_12 + PPC_LO (got + 4), p + 2*4); 10840 bfd_put_32 (output_bfd, 10841 LWZ_12_12 + PPC_LO (got + 8), p + 6*4); 10842 } 10843 else 10844 { 10845 bfd_put_32 (output_bfd, 10846 LWZU_0_12 + PPC_LO (got + 4), p + 2*4); 10847 bfd_put_32 (output_bfd, 10848 LWZ_12_12 + 4, p + 6*4); 10849 } 10850 } 10851 } 10852 10853 if (htab->glink_eh_frame != NULL 10854 && htab->glink_eh_frame->contents != NULL) 10855 { 10856 unsigned char *p = htab->glink_eh_frame->contents; 10857 bfd_vma val; 10858 10859 p += sizeof (glink_eh_frame_cie); 10860 /* FDE length. */ 10861 p += 4; 10862 /* CIE pointer. */ 10863 p += 4; 10864 /* Offset to .glink. */ 10865 val = (htab->glink->output_section->vma 10866 + htab->glink->output_offset); 10867 val -= (htab->glink_eh_frame->output_section->vma 10868 + htab->glink_eh_frame->output_offset); 10869 val -= p - htab->glink_eh_frame->contents; 10870 bfd_put_32 (htab->elf.dynobj, val, p); 10871 10872 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME 10873 && !_bfd_elf_write_section_eh_frame (output_bfd, info, 10874 htab->glink_eh_frame, 10875 htab->glink_eh_frame->contents)) 10876 return FALSE; 10877 } 10878 10879 return ret; 10880} 10881 10882#define TARGET_LITTLE_SYM powerpc_elf32_le_vec 10883#define TARGET_LITTLE_NAME "elf32-powerpcle" 10884#define TARGET_BIG_SYM powerpc_elf32_vec 10885#define TARGET_BIG_NAME "elf32-powerpc" 10886#define ELF_ARCH bfd_arch_powerpc 10887#define ELF_TARGET_ID PPC32_ELF_DATA 10888#define ELF_MACHINE_CODE EM_PPC 10889#if defined(__QNXTARGET__) || defined(__HAIKU_TARGET__) 10890#define ELF_MAXPAGESIZE 0x1000 10891#define ELF_COMMONPAGESIZE 0x1000 10892#else 10893#define ELF_MAXPAGESIZE 0x10000 10894#define ELF_COMMONPAGESIZE 0x10000 10895#endif 10896#define ELF_MINPAGESIZE 0x1000 10897#define elf_info_to_howto ppc_elf_info_to_howto 10898 10899#ifdef EM_CYGNUS_POWERPC 10900#define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC 10901#endif 10902 10903#ifdef EM_PPC_OLD 10904#define ELF_MACHINE_ALT2 EM_PPC_OLD 10905#endif 10906 10907#define elf_backend_plt_not_loaded 1 10908#define elf_backend_want_dynrelro 1 10909#define elf_backend_can_gc_sections 1 10910#define elf_backend_can_refcount 1 10911#define elf_backend_rela_normal 1 10912#define elf_backend_caches_rawsize 1 10913 10914#define bfd_elf32_mkobject ppc_elf_mkobject 10915#define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data 10916#define bfd_elf32_bfd_relax_section ppc_elf_relax_section 10917#define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup 10918#define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup 10919#define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags 10920#define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create 10921#define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab 10922 10923#define elf_backend_object_p ppc_elf_object_p 10924#define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook 10925#define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook 10926#define elf_backend_section_from_shdr ppc_elf_section_from_shdr 10927#define elf_backend_relocate_section ppc_elf_relocate_section 10928#define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections 10929#define elf_backend_check_relocs ppc_elf_check_relocs 10930#define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol 10931#define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol 10932#define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook 10933#define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections 10934#define elf_backend_hash_symbol ppc_elf_hash_symbol 10935#define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol 10936#define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections 10937#define elf_backend_fake_sections ppc_elf_fake_sections 10938#define elf_backend_additional_program_headers ppc_elf_additional_program_headers 10939#define elf_backend_modify_segment_map ppc_elf_modify_segment_map 10940#define elf_backend_grok_prstatus ppc_elf_grok_prstatus 10941#define elf_backend_grok_psinfo ppc_elf_grok_psinfo 10942#define elf_backend_write_core_note ppc_elf_write_core_note 10943#define elf_backend_reloc_type_class ppc_elf_reloc_type_class 10944#define elf_backend_begin_write_processing ppc_elf_begin_write_processing 10945#define elf_backend_final_write_processing ppc_elf_final_write_processing 10946#define elf_backend_write_section ppc_elf_write_section 10947#define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr 10948#define elf_backend_plt_sym_val ppc_elf_plt_sym_val 10949#define elf_backend_action_discarded ppc_elf_action_discarded 10950#define elf_backend_init_index_section _bfd_elf_init_1_index_section 10951#define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags 10952 10953#include "elf32-target.h" 10954 10955/* FreeBSD Target */ 10956 10957#undef TARGET_LITTLE_SYM 10958#undef TARGET_LITTLE_NAME 10959 10960#undef TARGET_BIG_SYM 10961#define TARGET_BIG_SYM powerpc_elf32_fbsd_vec 10962#undef TARGET_BIG_NAME 10963#define TARGET_BIG_NAME "elf32-powerpc-freebsd" 10964 10965#undef ELF_OSABI 10966#define ELF_OSABI ELFOSABI_FREEBSD 10967 10968#undef elf32_bed 10969#define elf32_bed elf32_powerpc_fbsd_bed 10970 10971#include "elf32-target.h" 10972 10973/* VxWorks Target */ 10974 10975#undef TARGET_LITTLE_SYM 10976#undef TARGET_LITTLE_NAME 10977 10978#undef TARGET_BIG_SYM 10979#define TARGET_BIG_SYM powerpc_elf32_vxworks_vec 10980#undef TARGET_BIG_NAME 10981#define TARGET_BIG_NAME "elf32-powerpc-vxworks" 10982 10983#undef ELF_OSABI 10984 10985/* VxWorks uses the elf default section flags for .plt. */ 10986static const struct bfd_elf_special_section * 10987ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) 10988{ 10989 if (sec->name == NULL) 10990 return NULL; 10991 10992 if (strcmp (sec->name, ".plt") == 0) 10993 return _bfd_elf_get_sec_type_attr (abfd, sec); 10994 10995 return ppc_elf_get_sec_type_attr (abfd, sec); 10996} 10997 10998/* Like ppc_elf_link_hash_table_create, but overrides 10999 appropriately for VxWorks. */ 11000static struct bfd_link_hash_table * 11001ppc_elf_vxworks_link_hash_table_create (bfd *abfd) 11002{ 11003 struct bfd_link_hash_table *ret; 11004 11005 ret = ppc_elf_link_hash_table_create (abfd); 11006 if (ret) 11007 { 11008 struct ppc_elf_link_hash_table *htab 11009 = (struct ppc_elf_link_hash_table *)ret; 11010 htab->is_vxworks = 1; 11011 htab->plt_type = PLT_VXWORKS; 11012 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE; 11013 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE; 11014 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE; 11015 } 11016 return ret; 11017} 11018 11019/* Tweak magic VxWorks symbols as they are loaded. */ 11020static bfd_boolean 11021ppc_elf_vxworks_add_symbol_hook (bfd *abfd, 11022 struct bfd_link_info *info, 11023 Elf_Internal_Sym *sym, 11024 const char **namep ATTRIBUTE_UNUSED, 11025 flagword *flagsp ATTRIBUTE_UNUSED, 11026 asection **secp, 11027 bfd_vma *valp) 11028{ 11029 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, 11030 valp)) 11031 return FALSE; 11032 11033 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp); 11034} 11035 11036static void 11037ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) 11038{ 11039 ppc_elf_final_write_processing(abfd, linker); 11040 elf_vxworks_final_write_processing(abfd, linker); 11041} 11042 11043/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so 11044 define it. */ 11045#undef elf_backend_want_plt_sym 11046#define elf_backend_want_plt_sym 1 11047#undef elf_backend_want_got_plt 11048#define elf_backend_want_got_plt 1 11049#undef elf_backend_got_symbol_offset 11050#define elf_backend_got_symbol_offset 0 11051#undef elf_backend_plt_not_loaded 11052#define elf_backend_plt_not_loaded 0 11053#undef elf_backend_plt_readonly 11054#define elf_backend_plt_readonly 1 11055#undef elf_backend_got_header_size 11056#define elf_backend_got_header_size 12 11057#undef elf_backend_dtrel_excludes_plt 11058#define elf_backend_dtrel_excludes_plt 1 11059 11060#undef bfd_elf32_get_synthetic_symtab 11061 11062#undef bfd_elf32_bfd_link_hash_table_create 11063#define bfd_elf32_bfd_link_hash_table_create \ 11064 ppc_elf_vxworks_link_hash_table_create 11065#undef elf_backend_add_symbol_hook 11066#define elf_backend_add_symbol_hook \ 11067 ppc_elf_vxworks_add_symbol_hook 11068#undef elf_backend_link_output_symbol_hook 11069#define elf_backend_link_output_symbol_hook \ 11070 elf_vxworks_link_output_symbol_hook 11071#undef elf_backend_final_write_processing 11072#define elf_backend_final_write_processing \ 11073 ppc_elf_vxworks_final_write_processing 11074#undef elf_backend_get_sec_type_attr 11075#define elf_backend_get_sec_type_attr \ 11076 ppc_elf_vxworks_get_sec_type_attr 11077#undef elf_backend_emit_relocs 11078#define elf_backend_emit_relocs \ 11079 elf_vxworks_emit_relocs 11080 11081#undef elf32_bed 11082#define elf32_bed ppc_elf_vxworks_bed 11083#undef elf_backend_post_process_headers 11084 11085#include "elf32-target.h" 11086